src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richtextctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/timer.h"
  30 #include "wx/textfile.h"
  31 #include "wx/ffile.h"
  32 #include "wx/filename.h"
  33 #include "wx/dcbuffer.h"
  34 #include "wx/arrimpl.cpp"
  35 #include "wx/fontenum.h"
  36 #include "wx/accel.h"
  37
  38 #if defined (__WXGTK__) || defined(__WXX11__) || defined(__WXMOTIF__)
  39 #define wxHAVE_PRIMARY_SELECTION 1
  40 #else
  41 #define wxHAVE_PRIMARY_SELECTION 0
  42 #endif
  43
  44 #if wxUSE_CLIPBOARD && wxHAVE_PRIMARY_SELECTION
  45 #include "wx/clipbrd.h"
  46 #endif
  47
  48 // DLL options compatibility check:
  49 #include "wx/app.h"
  50 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  51
  52 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_LEFT_CLICK, wxRichTextEvent );
  53 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK, wxRichTextEvent );
  54 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK, wxRichTextEvent );
  55 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK, wxRichTextEvent );
  56 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_RETURN, wxRichTextEvent );
  57 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CHARACTER, wxRichTextEvent );
  58 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_DELETE, wxRichTextEvent );
  59
  60 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING, wxRichTextEvent );
  61 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED, wxRichTextEvent );
  62 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING, wxRichTextEvent );
  63 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED, wxRichTextEvent );
  64
  65 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED, wxRichTextEvent );
  66 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED, wxRichTextEvent );
  67 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED, wxRichTextEvent );
  68 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_PROPERTIES_CHANGED, wxRichTextEvent );
  69 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED, wxRichTextEvent );
  70 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_BUFFER_RESET, wxRichTextEvent );
  71 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_FOCUS_OBJECT_CHANGED, wxRichTextEvent );
  72
  73 #if wxRICHTEXT_USE_OWN_CARET
  74
  75 /*!
  76  * wxRichTextCaret
  77  *
  78  * This implements a non-flashing cursor in case there
  79  * are platform-specific problems with the generic caret.
  80  * wxRICHTEXT_USE_OWN_CARET is set in richtextbuffer.h.
  81  */
  82
  83 class wxRichTextCaret;
  84 class wxRichTextCaretTimer: public wxTimer
  85 {
  86   public:
  87     wxRichTextCaretTimer(wxRichTextCaret* caret)
  88     {
  89         m_caret = caret;
  90     }
  91     virtual void Notify();
  92     wxRichTextCaret* m_caret;
  93 };
  94
  95 class wxRichTextCaret: public wxCaret
  96 {
  97 public:
  98     // ctors
  99     // -----
 100         // default - use Create()
 101     wxRichTextCaret(): m_timer(this)  { Init(); }
 102         // creates a block caret associated with the given window
 103     wxRichTextCaret(wxRichTextCtrl *window, int width, int height)
 104         : wxCaret(window, width, height), m_timer(this) { Init(); m_richTextCtrl = window; }
 105     wxRichTextCaret(wxRichTextCtrl *window, const wxSize& size)
 106         : wxCaret(window, size), m_timer(this) { Init(); m_richTextCtrl = window; }
 107
 108     virtual ~wxRichTextCaret();
 109
 110     // implementation
 111     // --------------
 112
 113     // called by wxWindow (not using the event tables)
 114     virtual void OnSetFocus();
 115     virtual void OnKillFocus();
 116
 117     // draw the caret on the given DC
 118     void DoDraw(wxDC *dc);
 119
 120     // get the visible count
 121     int GetVisibleCount() const { return m_countVisible; }
 122
 123     // delay repositioning
 124     bool GetNeedsUpdate() const { return m_needsUpdate; }
 125     void SetNeedsUpdate(bool needsUpdate = true ) { m_needsUpdate = needsUpdate; }
 126
 127     void Notify();
 128
 129     bool GetRefreshEnabled() const { return m_refreshEnabled; }
 130     void EnableRefresh(bool b) { m_refreshEnabled = b; }
 131
 132 protected:
 133     virtual void DoShow();
 134     virtual void DoHide();
 135     virtual void DoMove();
 136     virtual void DoSize();
 137
 138     // refresh the caret
 139     void Refresh();
 140
 141 private:
 142     void Init();
 143
 144     int           m_xOld,
 145                   m_yOld;
 146     bool          m_hasFocus;       // true => our window has focus
 147     bool          m_needsUpdate;    // must be repositioned
 148     bool          m_flashOn;
 149     wxRichTextCaretTimer m_timer;
 150     wxRichTextCtrl* m_richTextCtrl;
 151     bool          m_refreshEnabled;
 152 };
 153 #endif
 154
 155 IMPLEMENT_DYNAMIC_CLASS( wxRichTextCtrl, wxControl )
 156
 157 IMPLEMENT_DYNAMIC_CLASS( wxRichTextEvent, wxNotifyEvent )
 158
 159 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
 160     EVT_PAINT(wxRichTextCtrl::OnPaint)
 161     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
 162     EVT_IDLE(wxRichTextCtrl::OnIdle)
 163     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
 164     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
 165     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
 166     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
 167     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
 168     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
 169     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
 170     EVT_CHAR(wxRichTextCtrl::OnChar)
 171     EVT_KEY_DOWN(wxRichTextCtrl::OnChar)
 172     EVT_SIZE(wxRichTextCtrl::OnSize)
 173     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
 174     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
 175     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
 176     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
 177     EVT_SYS_COLOUR_CHANGED(wxRichTextCtrl::OnSysColourChanged)
 178
 179     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
 180     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
 181
 182     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
 183     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
 184
 185     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
 186     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
 187
 188     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
 189     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
 190
 191     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
 192     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
 193
 194     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
 195     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
 196
 197     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
 198     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 199
 200     EVT_MENU(wxID_RICHTEXT_PROPERTIES1, wxRichTextCtrl::OnProperties)
 201     EVT_UPDATE_UI(wxID_RICHTEXT_PROPERTIES1, wxRichTextCtrl::OnUpdateProperties)
 202
 203     EVT_MENU(wxID_RICHTEXT_PROPERTIES2, wxRichTextCtrl::OnProperties)
 204     EVT_UPDATE_UI(wxID_RICHTEXT_PROPERTIES2, wxRichTextCtrl::OnUpdateProperties)
 205
 206     EVT_MENU(wxID_RICHTEXT_PROPERTIES3, wxRichTextCtrl::OnProperties)
 207     EVT_UPDATE_UI(wxID_RICHTEXT_PROPERTIES3, wxRichTextCtrl::OnUpdateProperties)
 208
 209 END_EVENT_TABLE()
 210
 211 /*!
 212  * wxRichTextCtrl
 213  */
 214
 215 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 216
 217 wxRichTextCtrl::wxRichTextCtrl()
 218               : wxScrollHelper(this)
 219 {
 220     Init();
 221 }
 222
 223 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 224                                wxWindowID id,
 225                                const wxString& value,
 226                                const wxPoint& pos,
 227                                const wxSize& size,
 228                                long style,
 229                                const wxValidator& validator,
 230                                const wxString& name)
 231               : wxScrollHelper(this)
 232 {
 233     Init();
 234     Create(parent, id, value, pos, size, style, validator, name);
 235 }
 236
 237 /// Creation
 238 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 239                              const wxValidator& validator, const wxString& name)
 240 {
 241     style |= wxVSCROLL;
 242
 243     if (!wxControl::Create(parent, id, pos, size,
 244                            style|wxFULL_REPAINT_ON_RESIZE,
 245                            validator, name))
 246         return false;
 247
 248     if (!GetFont().IsOk())
 249     {
 250         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 251     }
 252
 253     // No physical scrolling, so we can preserve margins
 254     EnableScrolling(false, false);
 255
 256     if (style & wxTE_READONLY)
 257         SetEditable(false);
 258
 259     // The base attributes must all have default values
 260     wxRichTextAttr attributes;
 261     attributes.SetFont(GetFont());
 262     attributes.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
 263     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 264     attributes.SetLineSpacing(10);
 265     attributes.SetParagraphSpacingAfter(10);
 266     attributes.SetParagraphSpacingBefore(0);
 267     SetBasicStyle(attributes);
 268
 269     int margin = 5;
 270     SetMargins(margin, margin);
 271
 272     // The default attributes will be merged with base attributes, so
 273     // can be empty to begin with
 274     wxRichTextAttr defaultAttributes;
 275     SetDefaultStyle(defaultAttributes);
 276
 277     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 278     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 279
 280     GetBuffer().Reset();
 281     GetBuffer().SetRichTextCtrl(this);
 282
 283 #if wxRICHTEXT_USE_OWN_CARET
 284     SetCaret(new wxRichTextCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 285 #else
 286     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 287 #endif
 288
 289     // Tell the sizers to use the given or best size
 290     SetInitialSize(size);
 291
 292 #if wxRICHTEXT_BUFFERED_PAINTING
 293     // Create a buffer
 294     RecreateBuffer(size);
 295 #endif
 296
 297     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 298     m_urlCursor = wxCursor(wxCURSOR_HAND);
 299
 300     SetCursor(m_textCursor);
 301
 302     if (!value.IsEmpty())
 303         SetValue(value);
 304
 305     GetBuffer().AddEventHandler(this);
 306
 307     // Accelerators
 308     wxAcceleratorEntry entries[6];
 309
 310     entries[0].Set(wxACCEL_CTRL,   (int) 'C',       wxID_COPY);
 311     entries[1].Set(wxACCEL_CTRL,   (int) 'X',       wxID_CUT);
 312     entries[2].Set(wxACCEL_CTRL,   (int) 'V',       wxID_PASTE);
 313     entries[3].Set(wxACCEL_CTRL,   (int) 'A',       wxID_SELECTALL);
 314     entries[4].Set(wxACCEL_CTRL,   (int) 'Z',       wxID_UNDO);
 315     entries[5].Set(wxACCEL_CTRL,   (int) 'Y',       wxID_REDO);
 316
 317     wxAcceleratorTable accel(6, entries);
 318     SetAcceleratorTable(accel);
 319
 320     m_contextMenu = new wxMenu;
 321     m_contextMenu->Append(wxID_UNDO, _("&Undo"));
 322     m_contextMenu->Append(wxID_REDO, _("&Redo"));
 323     m_contextMenu->AppendSeparator();
 324     m_contextMenu->Append(wxID_CUT, _("Cu&t"));
 325     m_contextMenu->Append(wxID_COPY, _("&Copy"));
 326     m_contextMenu->Append(wxID_PASTE, _("&Paste"));
 327     m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
 328     m_contextMenu->AppendSeparator();
 329     m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
 330     m_contextMenu->AppendSeparator();
 331     m_contextMenu->Append(wxID_RICHTEXT_PROPERTIES1, _("&Properties"));
 332
 333 #if wxUSE_DRAG_AND_DROP
 334     SetDropTarget(new wxRichTextDropTarget(this));
 335 #endif
 336
 337     return true;
 338 }
 339
 340 wxRichTextCtrl::~wxRichTextCtrl()
 341 {
 342     SetFocusObject(& GetBuffer(), false);
 343     GetBuffer().RemoveEventHandler(this);
 344
 345     delete m_contextMenu;
 346 }
 347
 348 /// Member initialisation
 349 void wxRichTextCtrl::Init()
 350 {
 351     m_contextMenu = NULL;
 352     m_caret = NULL;
 353     m_caretPosition = -1;
 354     m_selectionAnchor = -2;
 355     m_selectionAnchorObject = NULL;
 356     m_selectionState = wxRichTextCtrlSelectionState_Normal;
 357     m_editable = true;
 358     m_verticalScrollbarEnabled = true;
 359     m_caretAtLineStart = false;
 360     m_dragging = false;
 361 #if wxUSE_DRAG_AND_DROP
 362     m_preDrag = false;
 363 #endif
 364     m_fullLayoutRequired = false;
 365     m_fullLayoutTime = 0;
 366     m_fullLayoutSavedPosition = 0;
 367     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 368     m_caretPositionForDefaultStyle = -2;
 369     m_focusObject = & m_buffer;
 370     m_scale = 1.0;
 371 }
 372
 373 void wxRichTextCtrl::DoThaw()
 374 {
 375     if (GetBuffer().IsDirty())
 376         LayoutContent();
 377     else
 378         SetupScrollbars();
 379
 380     wxWindow::DoThaw();
 381 }
 382
 383 /// Clear all text
 384 void wxRichTextCtrl::Clear()
 385 {
 386     if (GetFocusObject() == & GetBuffer())
 387     {
 388         m_buffer.ResetAndClearCommands();
 389         m_buffer.Invalidate(wxRICHTEXT_ALL);
 390     }
 391     else
 392     {
 393         GetFocusObject()->Reset();
 394     }
 395
 396     m_caretPosition = -1;
 397     m_caretPositionForDefaultStyle = -2;
 398     m_caretAtLineStart = false;
 399     m_selection.Reset();
 400     m_selectionState = wxRichTextCtrlSelectionState_Normal;
 401
 402     Scroll(0,0);
 403
 404     if (!IsFrozen())
 405     {
 406         LayoutContent();
 407         Refresh(false);
 408     }
 409
 410     wxTextCtrl::SendTextUpdatedEvent(this);
 411 }
 412
 413 /// Painting
 414 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 415 {
 416 #if !wxRICHTEXT_USE_OWN_CARET
 417     if (GetCaret() && !IsFrozen())
 418         GetCaret()->Hide();
 419 #else
 420     // Stop the caret refreshing the control from within the
 421     // paint handler
 422     if (GetCaret())
 423         ((wxRichTextCaret*) GetCaret())->EnableRefresh(false);
 424 #endif
 425
 426     {
 427 #if wxRICHTEXT_BUFFERED_PAINTING
 428         wxBufferedPaintDC dc(this, m_bufferBitmap);
 429 #else
 430         wxPaintDC dc(this);
 431 #endif
 432
 433         if (IsFrozen())
 434             return;
 435
 436         PrepareDC(dc);
 437
 438         dc.SetFont(GetFont());
 439
 440         // Paint the background
 441         PaintBackground(dc);
 442
 443         wxRect drawingArea(GetUpdateRegion().GetBox());
 444         drawingArea.SetPosition(GetUnscaledPoint(GetLogicalPoint(drawingArea.GetPosition())));
 445         drawingArea.SetSize(GetUnscaledSize(drawingArea.GetSize()));
 446
 447         wxRect availableSpace(GetUnscaledSize(GetClientSize()));
 448         wxRichTextDrawingContext context(& GetBuffer());
 449         if (GetBuffer().IsDirty())
 450         {
 451             dc.SetUserScale(GetScale(), GetScale());
 452
 453             GetBuffer().Layout(dc, context, availableSpace, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 454             GetBuffer().Invalidate(wxRICHTEXT_NONE);
 455
 456             dc.SetUserScale(1.0, 1.0);
 457
 458             SetupScrollbars();
 459         }
 460
 461         wxRect clipRect(availableSpace);
 462         clipRect.x += GetBuffer().GetLeftMargin();
 463         clipRect.y += GetBuffer().GetTopMargin();
 464         clipRect.width -= (GetBuffer().GetLeftMargin() + GetBuffer().GetRightMargin());
 465         clipRect.height -= (GetBuffer().GetTopMargin() + GetBuffer().GetBottomMargin());
 466
 467         clipRect = GetScaledRect(clipRect);
 468         clipRect.SetPosition(GetLogicalPoint(clipRect.GetPosition()));
 469
 470         dc.SetClippingRegion(clipRect);
 471
 472         int flags = 0;
 473         if ((GetExtraStyle() & wxRICHTEXT_EX_NO_GUIDELINES) == 0)
 474             flags |= wxRICHTEXT_DRAW_GUIDELINES;
 475
 476         dc.SetUserScale(GetScale(), GetScale());
 477
 478         GetBuffer().Draw(dc, context, GetBuffer().GetOwnRange(), GetSelection(), drawingArea, 0 /* descent */, flags);
 479
 480         dc.DestroyClippingRegion();
 481
 482         // Other user defined painting after everything else (i.e. all text) is painted
 483         PaintAboveContent(dc);
 484
 485 #if wxRICHTEXT_USE_OWN_CARET
 486         if (GetCaret()->IsVisible())
 487         {
 488             PositionCaret();
 489             ((wxRichTextCaret*) GetCaret())->DoDraw(& dc);
 490         }
 491 #endif
 492
 493         dc.SetUserScale(1.0, 1.0);
 494     }
 495
 496 #if !wxRICHTEXT_USE_OWN_CARET
 497     if (GetCaret())
 498         GetCaret()->Show();
 499     PositionCaret();
 500 #else
 501     if (GetCaret())
 502         ((wxRichTextCaret*) GetCaret())->EnableRefresh(true);
 503 #endif
 504 }
 505
 506 // Empty implementation, to prevent flicker
 507 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 508 {
 509 }
 510
 511 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 512 {
 513     if (GetCaret())
 514     {
 515 #if !wxRICHTEXT_USE_OWN_CARET
 516         PositionCaret();
 517 #endif
 518         GetCaret()->Show();
 519     }
 520
 521 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 522     // Work around dropouts when control is focused
 523     if (!IsFrozen())
 524     {
 525         Refresh(false);
 526     }
 527 #endif
 528 }
 529
 530 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 531 {
 532     if (GetCaret())
 533         GetCaret()->Hide();
 534
 535 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 536     // Work around dropouts when control is focused
 537     if (!IsFrozen())
 538     {
 539         Refresh(false);
 540     }
 541 #endif
 542 }
 543
 544 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 545 {
 546     m_dragging = false;
 547 }
 548
 549 // Set up the caret for the given position and container, after a mouse click
 550 bool wxRichTextCtrl::SetCaretPositionAfterClick(wxRichTextParagraphLayoutBox* container, long position, int hitTestFlags, bool extendSelection)
 551 {
 552     bool caretAtLineStart = false;
 553
 554     if (hitTestFlags & wxRICHTEXT_HITTEST_BEFORE)
 555     {
 556         // If we're at the start of a line (but not first in para)
 557         // then we should keep the caret showing at the start of the line
 558         // by showing the m_caretAtLineStart flag.
 559         wxRichTextParagraph* para = container->GetParagraphAtPosition(position);
 560         wxRichTextLine* line = container->GetLineAtPosition(position);
 561
 562         if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 563             caretAtLineStart = true;
 564         position --;
 565     }
 566
 567     if (extendSelection && (m_caretPosition != position))
 568         ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 569
 570     MoveCaret(position, caretAtLineStart);
 571     SetDefaultStyleToCursorStyle();
 572
 573     return true;
 574 }
 575
 576 /// Left-click
 577 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 578 {
 579     SetFocus();
 580
 581     wxClientDC dc(this);
 582     PrepareDC(dc);
 583     dc.SetFont(GetFont());
 584
 585     // TODO: detect change of focus object
 586     long position = 0;
 587     wxRichTextObject* hitObj = NULL;
 588     wxRichTextObject* contextObj = NULL;
 589     wxRichTextDrawingContext context(& GetBuffer());
 590     int hit = GetBuffer().HitTest(dc, context, GetUnscaledPoint(event.GetLogicalPosition(dc)), position, & hitObj, & contextObj, wxRICHTEXT_HITTEST_HONOUR_ATOMIC);
 591
 592 #if wxUSE_DRAG_AND_DROP
 593     // If there's no selection, or we're not inside it, this isn't an attempt to initiate Drag'n'Drop
 594     if (IsEditable() && HasSelection() && GetSelectionRange().ToInternal().Contains(position))
 595     {
 596         // This might be an attempt at initiating Drag'n'Drop. So set the time & flags
 597         m_preDrag = true;
 598         m_dragStartPoint = event.GetPosition();   // No need to worry about logical positions etc, we only care about the distance from the original pt
 599
 600 #if wxUSE_DATETIME
 601         m_dragStartTime = wxDateTime::UNow();
 602 #endif // wxUSE_DATETIME
 603
 604         // Preserve behaviour of clicking on an object within the selection
 605         if (hit != wxRICHTEXT_HITTEST_NONE && hitObj)
 606             m_dragging = true;
 607
 608         return; // Don't skip the event, else the selection will be lost
 609     }
 610 #endif // wxUSE_DRAG_AND_DROP
 611
 612     if (hit != wxRICHTEXT_HITTEST_NONE && hitObj)
 613     {
 614         wxRichTextParagraphLayoutBox* oldFocusObject = GetFocusObject();
 615         wxRichTextParagraphLayoutBox* container = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
 616         if (container && container != GetFocusObject() && container->AcceptsFocus())
 617         {
 618             SetFocusObject(container, false /* don't set caret position yet */);
 619         }
 620
 621         m_dragging = true;
 622         CaptureMouse();
 623
 624         long oldCaretPos = m_caretPosition;
 625
 626         SetCaretPositionAfterClick(container, position, hit);
 627
 628         // For now, don't handle shift-click when we're selecting multiple objects.
 629         if (event.ShiftDown() && GetFocusObject() == oldFocusObject && m_selectionState == wxRichTextCtrlSelectionState_Normal)
 630             ExtendSelection(oldCaretPos, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 631         else
 632             SelectNone();
 633     }
 634
 635     event.Skip();
 636 }
 637
 638 /// Left-up
 639 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 640 {
 641     if (m_dragging)
 642     {
 643         m_dragging = false;
 644         if (GetCapture() == this)
 645             ReleaseMouse();
 646
 647         // See if we clicked on a URL
 648         wxClientDC dc(this);
 649         PrepareDC(dc);
 650         dc.SetFont(GetFont());
 651
 652         long position = 0;
 653         wxPoint logicalPt = event.GetLogicalPosition(dc);
 654         wxRichTextObject* hitObj = NULL;
 655         wxRichTextObject* contextObj = NULL;
 656         wxRichTextDrawingContext context(& GetBuffer());
 657         // Only get objects at this level, not nested, because otherwise we couldn't swipe text at a single level.
 658         int hit = GetFocusObject()->HitTest(dc, context, GetUnscaledPoint(logicalPt), position, & hitObj, & contextObj, wxRICHTEXT_HITTEST_NO_NESTED_OBJECTS|wxRICHTEXT_HITTEST_HONOUR_ATOMIC);
 659
 660 #if wxUSE_DRAG_AND_DROP
 661         if (m_preDrag)
 662         {
 663             // Preserve the behaviour that would have happened without drag-and-drop detection, in OnLeftClick
 664             m_preDrag = false; // Tell DnD not to happen now: we are processing Left Up ourselves.
 665
 666             // Do the actions that would have been done in OnLeftClick if we hadn't tried to drag
 667             long position = 0;
 668             wxRichTextObject* hitObj = NULL;
 669             wxRichTextObject* contextObj = NULL;
 670             int hit = GetBuffer().HitTest(dc, context, GetUnscaledPoint(event.GetLogicalPosition(dc)), position, & hitObj, & contextObj, wxRICHTEXT_HITTEST_HONOUR_ATOMIC);
 671             wxRichTextParagraphLayoutBox* oldFocusObject = GetFocusObject();
 672             wxRichTextParagraphLayoutBox* container = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
 673             if (container && container != GetFocusObject() && container->AcceptsFocus())
 674             {
 675                 SetFocusObject(container, false /* don't set caret position yet */);
 676             }
 677
 678             long oldCaretPos = m_caretPosition;
 679
 680             SetCaretPositionAfterClick(container, position, hit);
 681
 682             // For now, don't handle shift-click when we're selecting multiple objects.
 683             if (event.ShiftDown() && GetFocusObject() == oldFocusObject && m_selectionState == wxRichTextCtrlSelectionState_Normal)
 684                 ExtendSelection(oldCaretPos, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 685             else
 686                 SelectNone();
 687         }
 688 #endif
 689
 690         if ((hit != wxRICHTEXT_HITTEST_NONE) && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 691         {
 692             wxRichTextEvent cmdEvent(
 693                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 694                 GetId());
 695             cmdEvent.SetEventObject(this);
 696             cmdEvent.SetPosition(position);
 697             if (hitObj)
 698                 cmdEvent.SetContainer(hitObj->GetContainer());
 699
 700             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 701             {
 702                 wxRichTextAttr attr;
 703                 if (GetStyle(position, attr))
 704                 {
 705                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 706                     {
 707                         wxString urlTarget = attr.GetURL();
 708                         if (!urlTarget.IsEmpty())
 709                         {
 710                             wxMouseEvent mouseEvent(event);
 711
 712                             long startPos = 0, endPos = 0;
 713                             wxRichTextObject* obj = GetFocusObject()->GetLeafObjectAtPosition(position);
 714                             if (obj)
 715                             {
 716                                 startPos = obj->GetRange().GetStart();
 717                                 endPos = obj->GetRange().GetEnd();
 718                             }
 719
 720                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 721                             InitCommandEvent(urlEvent);
 722
 723                             urlEvent.SetString(urlTarget);
 724
 725                             GetEventHandler()->ProcessEvent(urlEvent);
 726                         }
 727                     }
 728                 }
 729             }
 730         }
 731     }
 732
 733 #if wxUSE_DRAG_AND_DROP
 734     m_preDrag = false;
 735 #endif // wxUSE_DRAG_AND_DROP
 736
 737 #if wxUSE_CLIPBOARD && wxUSE_DATAOBJ && wxHAVE_PRIMARY_SELECTION
 738     if (HasSelection() && GetFocusObject() && GetFocusObject()->GetBuffer())
 739     {
 740         // Put the selection in PRIMARY, if it exists
 741         wxTheClipboard->UsePrimarySelection(true);
 742
 743         wxRichTextRange range = GetInternalSelectionRange();
 744         GetFocusObject()->GetBuffer()->CopyToClipboard(range);
 745
 746         wxTheClipboard->UsePrimarySelection(false);
 747     }
 748 #endif
 749 }
 750
 751 /// Mouse-movements
 752 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 753 {
 754 #if wxUSE_DRAG_AND_DROP
 755     size_t distance = 0;
 756     if (m_preDrag || m_dragging)
 757     {
 758         int x = m_dragStartPoint.x - event.GetPosition().x;
 759         int y = m_dragStartPoint.y - event.GetPosition().y;
 760         distance = abs(x) + abs(y);
 761     }
 762
 763     // See if we're starting Drag'n'Drop
 764     if (m_preDrag)
 765     {
 766 #if wxUSE_DATETIME
 767         wxTimeSpan diff = wxDateTime::UNow() - m_dragStartTime;
 768 #endif
 769         if ((distance > 10)
 770 #if wxUSE_DATETIME
 771              && (diff.GetMilliseconds() > 100)
 772 #endif
 773            )
 774         {
 775             m_dragging = false;
 776
 777             // Start drag'n'drop
 778             wxRichTextRange range = GetInternalSelectionRange();
 779             if (range == wxRICHTEXT_NONE)
 780             {
 781               // Don't try to drag an empty range
 782               m_preDrag = false;
 783               return;
 784             }
 785
 786             // Cache the current situation, to be restored if Drag'n'Drop is cancelled
 787             long oldPos = GetCaretPosition();
 788             wxRichTextParagraphLayoutBox* oldFocus = GetFocusObject();
 789
 790             wxDataObjectComposite* compositeObject = new wxDataObjectComposite();
 791             wxString text = GetFocusObject()->GetTextForRange(range);
 792 #ifdef __WXMSW__
 793             text = wxTextFile::Translate(text, wxTextFileType_Dos);
 794 #endif
 795             compositeObject->Add(new wxTextDataObject(text), false /* not preferred */);
 796
 797             wxRichTextBuffer* richTextBuf = new wxRichTextBuffer;
 798             GetFocusObject()->CopyFragment(range, *richTextBuf);
 799             compositeObject->Add(new wxRichTextBufferDataObject(richTextBuf), true /* preferred */);
 800
 801             wxRichTextDropSource source(*compositeObject, this);
 802             // Use wxDrag_DefaultMove, not because it's the likelier choice but because pressing Ctrl for Copy obeys the principle of least surprise
 803             // The alternative, wxDrag_DefaultCopy, requires the user to know that Move needs the Shift key pressed
 804             BeginBatchUndo(_("Drag"));
 805             switch (source.DoDragDrop(wxDrag_AllowMove | wxDrag_DefaultMove))
 806             {
 807                 case wxDragMove:
 808                 case wxDragCopy:  break;
 809
 810                 case wxDragError:
 811                     wxLogError(wxT("An error occurred during drag and drop operation"));
 812                 case wxDragNone:
 813                 case wxDragCancel:
 814                     Refresh(); // This is needed in wxMSW, otherwise resetting the position doesn't 'take'
 815                     SetCaretPosition(oldPos);
 816                     SetFocusObject(oldFocus, false);
 817                 default: break;
 818             }
 819             EndBatchUndo();
 820
 821             m_preDrag = false;
 822             return;
 823         }
 824     }
 825 #endif // wxUSE_DRAG_AND_DROP
 826
 827     wxClientDC dc(this);
 828     PrepareDC(dc);
 829     dc.SetFont(GetFont());
 830
 831     long position = 0;
 832     wxPoint logicalPt = event.GetLogicalPosition(dc);
 833     wxRichTextObject* hitObj = NULL;
 834     wxRichTextObject* contextObj = NULL;
 835
 836     int flags = 0;
 837
 838     // If we're dragging, let's only consider positions at this level; otherwise
 839     // selecting a range is not going to work.
 840     wxRichTextParagraphLayoutBox* container = & GetBuffer();
 841     if (m_dragging)
 842     {
 843         flags = wxRICHTEXT_HITTEST_NO_NESTED_OBJECTS;
 844         container = GetFocusObject();
 845     }
 846     wxRichTextDrawingContext context(& GetBuffer());
 847     int hit = container->HitTest(dc, context, GetUnscaledPoint(logicalPt), position, & hitObj, & contextObj, flags);
 848
 849     // See if we need to change the cursor
 850
 851     {
 852         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE) && hitObj)
 853         {
 854             wxRichTextParagraphLayoutBox* actualContainer = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
 855             if (actualContainer)
 856                 ProcessMouseMovement(actualContainer, hitObj, position, logicalPt);
 857         }
 858         else
 859             SetCursor(m_textCursor);
 860     }
 861
 862     if (!event.Dragging())
 863     {
 864         event.Skip();
 865         return;
 866     }
 867
 868     if (m_dragging
 869 #if wxUSE_DRAG_AND_DROP
 870         && !m_preDrag
 871         && (distance > 4)
 872 #endif
 873         )
 874     {
 875         wxRichTextParagraphLayoutBox* commonAncestor = NULL;
 876         wxRichTextParagraphLayoutBox* otherContainer = NULL;
 877         wxRichTextParagraphLayoutBox* firstContainer = NULL;
 878
 879         // Check for dragging across multiple containers
 880         long position2 = 0;
 881         wxRichTextObject* hitObj2 = NULL, *contextObj2 = NULL;
 882         int hit2 = GetBuffer().HitTest(dc, context, GetUnscaledPoint(logicalPt), position2, & hitObj2, & contextObj2, 0);
 883         if (hit2 != wxRICHTEXT_HITTEST_NONE && !(hit2 & wxRICHTEXT_HITTEST_OUTSIDE) && hitObj2 && hitObj != hitObj2)
 884         {
 885             // See if we can find a common ancestor
 886             if (m_selectionState == wxRichTextCtrlSelectionState_Normal)
 887             {
 888                 firstContainer = GetFocusObject();
 889                 commonAncestor = wxDynamicCast(firstContainer->GetParent(), wxRichTextParagraphLayoutBox);
 890             }
 891             else
 892             {
 893                 firstContainer = wxDynamicCast(m_selectionAnchorObject, wxRichTextParagraphLayoutBox);
 894                 //commonAncestor = GetFocusObject(); // when the selection state is not normal, the focus object (e.g. table)
 895                                                    // is the common ancestor.
 896                 commonAncestor = wxDynamicCast(firstContainer->GetParent(), wxRichTextParagraphLayoutBox);
 897             }
 898
 899             if (commonAncestor && commonAncestor->HandlesChildSelections())
 900             {
 901                 wxRichTextObject* p = hitObj2;
 902                 while (p)
 903                 {
 904                     if (p->GetParent() == commonAncestor)
 905                     {
 906                         otherContainer = wxDynamicCast(p, wxRichTextParagraphLayoutBox);
 907                         break;
 908                     }
 909                     p = p->GetParent();
 910                 }
 911             }
 912
 913             if (commonAncestor && firstContainer && otherContainer)
 914             {
 915                 // We have now got a second container that shares a parent with the current or anchor object.
 916                 if (m_selectionState == wxRichTextCtrlSelectionState_Normal)
 917                 {
 918                     // Don't go into common-ancestor selection mode if we still have the same
 919                     // container.
 920                     if (otherContainer != firstContainer)
 921                     {
 922                         m_selectionState = wxRichTextCtrlSelectionState_CommonAncestor;
 923                         m_selectionAnchorObject = firstContainer;
 924                         m_selectionAnchor = firstContainer->GetRange().GetStart();
 925
 926                         // The common ancestor, such as a table, returns the cell selection
 927                         // between the anchor and current position.
 928                         m_selection = commonAncestor->GetSelection(m_selectionAnchor, otherContainer->GetRange().GetStart());
 929                     }
 930                 }
 931                 else
 932                 {
 933                     m_selection = commonAncestor->GetSelection(m_selectionAnchor, otherContainer->GetRange().GetStart());
 934                 }
 935
 936                 Refresh();
 937
 938                 if (otherContainer->AcceptsFocus())
 939                     SetFocusObject(otherContainer, false /* don't set caret and clear selection */);
 940                 MoveCaret(-1, false);
 941                 SetDefaultStyleToCursorStyle();
 942             }
 943         }
 944     }
 945
 946     if (hitObj && m_dragging && hit != wxRICHTEXT_HITTEST_NONE && m_selectionState == wxRichTextCtrlSelectionState_Normal
 947 #if wxUSE_DRAG_AND_DROP
 948         && !m_preDrag
 949         && (distance > 4)
 950 #endif
 951         )
 952     {
 953         SetCaretPositionAfterClick(container, position, hit, true /* extend selection */);
 954     }
 955 }
 956
 957 /// Right-click
 958 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 959 {
 960     SetFocus();
 961
 962     wxClientDC dc(this);
 963     PrepareDC(dc);
 964     dc.SetFont(GetFont());
 965
 966     long position = 0;
 967     wxPoint logicalPt = event.GetLogicalPosition(dc);
 968     wxRichTextObject* hitObj = NULL;
 969     wxRichTextObject* contextObj = NULL;
 970     wxRichTextDrawingContext context(& GetBuffer());
 971     int hit = GetFocusObject()->HitTest(dc, context, GetUnscaledPoint(logicalPt), position, & hitObj, & contextObj, wxRICHTEXT_HITTEST_HONOUR_ATOMIC);
 972
 973     if (hitObj && hitObj->GetContainer() != GetFocusObject())
 974     {
 975         wxRichTextParagraphLayoutBox* actualContainer = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
 976         if (actualContainer && actualContainer->AcceptsFocus())
 977         {
 978             SetFocusObject(actualContainer, false /* don't set caret position yet */);
 979             SetCaretPositionAfterClick(actualContainer, position, hit);
 980         }
 981     }
 982
 983     wxRichTextEvent cmdEvent(
 984         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 985         GetId());
 986     cmdEvent.SetEventObject(this);
 987     cmdEvent.SetPosition(position);
 988     if (hitObj)
 989         cmdEvent.SetContainer(hitObj->GetContainer());
 990
 991     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 992         event.Skip();
 993 }
 994
 995 /// Left-double-click
 996 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 997 {
 998     wxRichTextEvent cmdEvent(
 999         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
1000         GetId());
1001     cmdEvent.SetEventObject(this);
1002     cmdEvent.SetPosition(m_caretPosition+1);
1003     cmdEvent.SetContainer(GetFocusObject());
1004
1005     if (!GetEventHandler()->ProcessEvent(cmdEvent))
1006     {
1007         SelectWord(GetCaretPosition()+1);
1008     }
1009 }
1010
1011 /// Middle-click
1012 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
1013 {
1014     wxRichTextEvent cmdEvent(
1015         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
1016         GetId());
1017     cmdEvent.SetEventObject(this);
1018     cmdEvent.SetPosition(m_caretPosition+1);
1019     cmdEvent.SetContainer(GetFocusObject());
1020
1021     if (!GetEventHandler()->ProcessEvent(cmdEvent))
1022         event.Skip();
1023
1024 #if wxUSE_CLIPBOARD && wxUSE_DATAOBJ && wxHAVE_PRIMARY_SELECTION
1025     // Paste any PRIMARY selection, if it exists
1026     wxTheClipboard->UsePrimarySelection(true);
1027     Paste();
1028     wxTheClipboard->UsePrimarySelection(false);
1029 #endif
1030 }
1031
1032 /// Key press
1033 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
1034 {
1035     int flags = 0;
1036     if (event.CmdDown())
1037         flags |= wxRICHTEXT_CTRL_DOWN;
1038     if (event.ShiftDown())
1039         flags |= wxRICHTEXT_SHIFT_DOWN;
1040     if (event.AltDown())
1041         flags |= wxRICHTEXT_ALT_DOWN;
1042
1043     if (event.GetEventType() == wxEVT_KEY_DOWN)
1044     {
1045         if (event.IsKeyInCategory(WXK_CATEGORY_NAVIGATION))
1046         {
1047             KeyboardNavigate(event.GetKeyCode(), flags);
1048             return;
1049         }
1050
1051         long keycode = event.GetKeyCode();
1052         switch ( keycode )
1053         {
1054             case WXK_ESCAPE:
1055             case WXK_START:
1056             case WXK_LBUTTON:
1057             case WXK_RBUTTON:
1058             case WXK_CANCEL:
1059             case WXK_MBUTTON:
1060             case WXK_CLEAR:
1061             case WXK_SHIFT:
1062             case WXK_ALT:
1063             case WXK_CONTROL:
1064             case WXK_MENU:
1065             case WXK_PAUSE:
1066             case WXK_CAPITAL:
1067             case WXK_END:
1068             case WXK_HOME:
1069             case WXK_LEFT:
1070             case WXK_UP:
1071             case WXK_RIGHT:
1072             case WXK_DOWN:
1073             case WXK_SELECT:
1074             case WXK_PRINT:
1075             case WXK_EXECUTE:
1076             case WXK_SNAPSHOT:
1077             case WXK_INSERT:
1078             case WXK_HELP:
1079             case WXK_F1:
1080             case WXK_F2:
1081             case WXK_F3:
1082             case WXK_F4:
1083             case WXK_F5:
1084             case WXK_F6:
1085             case WXK_F7:
1086             case WXK_F8:
1087             case WXK_F9:
1088             case WXK_F10:
1089             case WXK_F11:
1090             case WXK_F12:
1091             case WXK_F13:
1092             case WXK_F14:
1093             case WXK_F15:
1094             case WXK_F16:
1095             case WXK_F17:
1096             case WXK_F18:
1097             case WXK_F19:
1098             case WXK_F20:
1099             case WXK_F21:
1100             case WXK_F22:
1101             case WXK_F23:
1102             case WXK_F24:
1103             case WXK_NUMLOCK:
1104             case WXK_SCROLL:
1105             case WXK_PAGEUP:
1106             case WXK_PAGEDOWN:
1107             case WXK_NUMPAD_F1:
1108             case WXK_NUMPAD_F2:
1109             case WXK_NUMPAD_F3:
1110             case WXK_NUMPAD_F4:
1111             case WXK_NUMPAD_HOME:
1112             case WXK_NUMPAD_LEFT:
1113             case WXK_NUMPAD_UP:
1114             case WXK_NUMPAD_RIGHT:
1115             case WXK_NUMPAD_DOWN:
1116             case WXK_NUMPAD_PAGEUP:
1117             case WXK_NUMPAD_PAGEDOWN:
1118             case WXK_NUMPAD_END:
1119             case WXK_NUMPAD_BEGIN:
1120             case WXK_NUMPAD_INSERT:
1121             case WXK_WINDOWS_LEFT:
1122             {
1123                 return;
1124             }
1125             default:
1126             {
1127             }
1128         }
1129
1130         // Must process this before translation, otherwise it's translated into a WXK_DELETE event.
1131         if (event.CmdDown() && event.GetKeyCode() == WXK_BACK)
1132         {
1133             if (!ProcessBackKey(event, flags))
1134                 return;
1135         }
1136         else
1137             event.Skip();
1138
1139         return;
1140     }
1141
1142     // all the other keys modify the controls contents which shouldn't be
1143     // possible if we're read-only
1144     if ( !IsEditable() )
1145     {
1146         event.Skip();
1147         return;
1148     }
1149
1150     if (event.GetKeyCode() == WXK_RETURN)
1151     {
1152         if (!CanInsertContent(* GetFocusObject(), m_caretPosition+1))
1153             return;
1154
1155         long newPos = m_caretPosition;
1156
1157         if (HasSelection() && !CanDeleteRange(* GetFocusObject(), GetSelectionRange()))
1158         {
1159             return;
1160         }
1161
1162         BeginBatchUndo(_("Insert Text"));
1163
1164         DeleteSelectedContent(& newPos);
1165
1166         if (event.ShiftDown())
1167         {
1168             wxString text;
1169             text = wxRichTextLineBreakChar;
1170             GetFocusObject()->InsertTextWithUndo(& GetBuffer(), newPos+1, text, this);
1171             m_caretAtLineStart = true;
1172             PositionCaret();
1173         }
1174         else
1175             GetFocusObject()->InsertNewlineWithUndo(& GetBuffer(), newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE|wxRICHTEXT_INSERT_INTERACTIVE);
1176
1177         // Automatically renumber list
1178         bool isNumberedList = false;
1179         wxRichTextRange numberedListRange = FindRangeForList(newPos+1, isNumberedList);
1180         if (isNumberedList && numberedListRange != wxRichTextRange(-1, -1))
1181         {
1182             NumberList(numberedListRange, NULL, wxRICHTEXT_SETSTYLE_RENUMBER|wxRICHTEXT_SETSTYLE_WITH_UNDO);
1183         }
1184
1185         EndBatchUndo();
1186         SetDefaultStyleToCursorStyle();
1187
1188         ScrollIntoView(m_caretPosition, WXK_RIGHT);
1189
1190         wxRichTextEvent cmdEvent(
1191             wxEVT_COMMAND_RICHTEXT_RETURN,
1192             GetId());
1193         cmdEvent.SetEventObject(this);
1194         cmdEvent.SetFlags(flags);
1195         cmdEvent.SetPosition(newPos+1);
1196         cmdEvent.SetContainer(GetFocusObject());
1197
1198         if (!GetEventHandler()->ProcessEvent(cmdEvent))
1199         {
1200             // Generate conventional event
1201             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
1202             InitCommandEvent(textEvent);
1203
1204             GetEventHandler()->ProcessEvent(textEvent);
1205         }
1206         Update();
1207     }
1208     else if (event.GetKeyCode() == WXK_BACK)
1209     {
1210         ProcessBackKey(event, flags);
1211     }
1212     else if (event.GetKeyCode() == WXK_DELETE)
1213     {
1214         long newPos = m_caretPosition;
1215
1216         if (HasSelection() && !CanDeleteRange(* GetFocusObject(), GetSelectionRange()))
1217         {
1218             return;
1219         }
1220
1221         BeginBatchUndo(_("Delete Text"));
1222
1223         bool processed = DeleteSelectedContent(& newPos);
1224
1225         int deletions = 0;
1226         if (processed)
1227             deletions ++;
1228
1229         // Submit range in character positions, which are greater than caret positions,
1230         if (newPos < GetFocusObject()->GetOwnRange().GetEnd()+1)
1231         {
1232             if (event.CmdDown())
1233             {
1234                 long pos = wxRichTextCtrl::FindNextWordPosition(1);
1235                 if (pos != -1 && (pos > newPos))
1236                 {
1237                     wxRichTextRange range(newPos+1, pos);
1238                     if (CanDeleteRange(* GetFocusObject(), range.FromInternal()))
1239                     {
1240                         GetFocusObject()->DeleteRangeWithUndo(range, this, & GetBuffer());
1241                         deletions ++;
1242                     }
1243                     processed = true;
1244                 }
1245             }
1246
1247             if (!processed && newPos < (GetLastPosition()-1))
1248             {
1249                 wxRichTextRange range(newPos+1, newPos+1);
1250                 if (CanDeleteRange(* GetFocusObject(), range.FromInternal()))
1251                 {
1252                     GetFocusObject()->DeleteRangeWithUndo(range, this, & GetBuffer());
1253                     deletions ++;
1254                 }
1255             }
1256         }
1257
1258         EndBatchUndo();
1259
1260         if (GetLastPosition() == -1)
1261         {
1262             GetFocusObject()->Reset();
1263
1264             m_caretPosition = -1;
1265             PositionCaret();
1266             SetDefaultStyleToCursorStyle();
1267         }
1268
1269         ScrollIntoView(m_caretPosition, WXK_LEFT);
1270
1271         // Always send this event; wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED will be sent only if there is an actual deletion.
1272         {
1273             wxRichTextEvent cmdEvent(
1274                 wxEVT_COMMAND_RICHTEXT_DELETE,
1275                 GetId());
1276             cmdEvent.SetEventObject(this);
1277             cmdEvent.SetFlags(flags);
1278             cmdEvent.SetPosition(m_caretPosition+1);
1279             cmdEvent.SetContainer(GetFocusObject());
1280             GetEventHandler()->ProcessEvent(cmdEvent);
1281         }
1282
1283         Update();
1284     }
1285     else
1286     {
1287         long keycode = event.GetKeyCode();
1288         switch ( keycode )
1289         {
1290             case WXK_ESCAPE:
1291             {
1292                 event.Skip();
1293                 return;
1294             }
1295
1296             default:
1297             {
1298 #ifdef __WXMAC__
1299                 if (event.CmdDown())
1300 #else
1301                 // Fixes AltGr+key with European input languages on Windows
1302                 if ((event.CmdDown() && !event.AltDown()) || (event.AltDown() && !event.CmdDown()))
1303 #endif
1304                 {
1305                     event.Skip();
1306                     return;
1307                 }
1308
1309                 wxRichTextEvent cmdEvent(
1310                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
1311                     GetId());
1312                 cmdEvent.SetEventObject(this);
1313                 cmdEvent.SetFlags(flags);
1314 #if wxUSE_UNICODE
1315                 cmdEvent.SetCharacter(event.GetUnicodeKey());
1316 #else
1317                 cmdEvent.SetCharacter((wxChar) keycode);
1318 #endif
1319                 cmdEvent.SetPosition(m_caretPosition+1);
1320                 cmdEvent.SetContainer(GetFocusObject());
1321
1322                 if (keycode == wxT('\t'))
1323                 {
1324                     // See if we need to promote or demote the selection or paragraph at the cursor
1325                     // position, instead of inserting a tab.
1326                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
1327                     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(pos);
1328                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
1329                     {
1330                         wxRichTextRange range;
1331                         if (HasSelection())
1332                             range = GetSelectionRange();
1333                         else
1334                             range = para->GetRange().FromInternal();
1335
1336                         int promoteBy = event.ShiftDown() ? 1 : -1;
1337
1338                         PromoteList(promoteBy, range, NULL);
1339
1340                         GetEventHandler()->ProcessEvent(cmdEvent);
1341
1342                         return;
1343                     }
1344                 }
1345
1346                 if (!CanInsertContent(* GetFocusObject(), m_caretPosition+1))
1347                     return;
1348
1349                 if (HasSelection() && !CanDeleteRange(* GetFocusObject(), GetSelectionRange()))
1350                     return;
1351
1352                 BeginBatchUndo(_("Insert Text"));
1353
1354                 long newPos = m_caretPosition;
1355                 DeleteSelectedContent(& newPos);
1356
1357 #if wxUSE_UNICODE
1358                 wxString str = event.GetUnicodeKey();
1359 #else
1360                 wxString str = (wxChar) event.GetKeyCode();
1361 #endif
1362                 GetFocusObject()->InsertTextWithUndo(& GetBuffer(), newPos+1, str, this, 0);
1363
1364                 EndBatchUndo();
1365
1366                 SetDefaultStyleToCursorStyle();
1367                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
1368
1369                 cmdEvent.SetPosition(m_caretPosition);
1370                 GetEventHandler()->ProcessEvent(cmdEvent);
1371
1372                 Update();
1373             }
1374         }
1375     }
1376 }
1377
1378 bool wxRichTextCtrl::ProcessMouseMovement(wxRichTextParagraphLayoutBox* container, wxRichTextObject* WXUNUSED(obj), long position, const wxPoint& WXUNUSED(pos))
1379 {
1380     wxRichTextAttr attr;
1381     if (container && GetStyle(position, attr, container))
1382     {
1383         if (attr.HasFlag(wxTEXT_ATTR_URL))
1384         {
1385             SetCursor(m_urlCursor);
1386         }
1387         else if (!attr.HasFlag(wxTEXT_ATTR_URL))
1388         {
1389             SetCursor(m_textCursor);
1390         }
1391         return true;
1392     }
1393     else
1394         return false;
1395 }
1396
1397 // Processes the back key
1398 bool wxRichTextCtrl::ProcessBackKey(wxKeyEvent& event, int flags)
1399 {
1400     if (!IsEditable())
1401     {
1402         return false;
1403     }
1404
1405     if (HasSelection() && !CanDeleteRange(* GetFocusObject(), GetSelectionRange()))
1406     {
1407         return false;
1408     }
1409
1410     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(m_caretPosition, true);
1411
1412     // If we're at the start of a list item with a bullet, let's 'delete' the bullet, i.e.
1413     // make it a continuation paragraph.
1414     if (!HasSelection() && para && ((m_caretPosition+1) == para->GetRange().GetStart()) &&
1415         para->GetAttributes().HasBulletStyle() && (para->GetAttributes().GetBulletStyle() & wxTEXT_ATTR_BULLET_STYLE_CONTINUATION) == 0)
1416     {
1417         wxRichTextParagraph* newPara = wxDynamicCast(para->Clone(), wxRichTextParagraph);
1418         newPara->GetAttributes().SetBulletStyle(newPara->GetAttributes().GetBulletStyle() | wxTEXT_ATTR_BULLET_STYLE_CONTINUATION);
1419
1420         wxRichTextAction* action = new wxRichTextAction(NULL, _("Remove Bullet"), wxRICHTEXT_CHANGE_STYLE, & GetBuffer(), GetFocusObject(), this);
1421         action->SetRange(newPara->GetRange());
1422         action->SetPosition(GetCaretPosition());
1423         action->GetNewParagraphs().AppendChild(newPara);
1424         // Also store the old ones for Undo
1425         action->GetOldParagraphs().AppendChild(new wxRichTextParagraph(*para));
1426
1427         GetBuffer().Invalidate(para->GetRange());
1428         GetBuffer().SubmitAction(action);
1429
1430         // Automatically renumber list
1431         bool isNumberedList = false;
1432         wxRichTextRange numberedListRange = FindRangeForList(m_caretPosition, isNumberedList);
1433         if (isNumberedList && numberedListRange != wxRichTextRange(-1, -1))
1434         {
1435             NumberList(numberedListRange, NULL, wxRICHTEXT_SETSTYLE_RENUMBER|wxRICHTEXT_SETSTYLE_WITH_UNDO);
1436         }
1437
1438         Update();
1439     }
1440     else
1441     {
1442         BeginBatchUndo(_("Delete Text"));
1443
1444         long newPos = m_caretPosition;
1445
1446         bool processed = DeleteSelectedContent(& newPos);
1447
1448         int deletions = 0;
1449         if (processed)
1450             deletions ++;
1451
1452         // Submit range in character positions, which are greater than caret positions,
1453         // so subtract 1 for deleted character and add 1 for conversion to character position.
1454         if (newPos > -1)
1455         {
1456             if (event.CmdDown())
1457             {
1458                 long pos = wxRichTextCtrl::FindNextWordPosition(-1);
1459                 if (pos < newPos)
1460                 {
1461                     wxRichTextRange range(pos+1, newPos);
1462                     if (CanDeleteRange(* GetFocusObject(), range.FromInternal()))
1463                     {
1464                         GetFocusObject()->DeleteRangeWithUndo(range, this, & GetBuffer());
1465                         deletions ++;
1466                     }
1467                     processed = true;
1468                 }
1469             }
1470
1471             if (!processed)
1472             {
1473                 wxRichTextRange range(newPos, newPos);
1474                 if (CanDeleteRange(* GetFocusObject(), range.FromInternal()))
1475                 {
1476                     GetFocusObject()->DeleteRangeWithUndo(range, this, & GetBuffer());
1477                     deletions ++;
1478                 }
1479             }
1480         }
1481
1482         EndBatchUndo();
1483
1484         if (GetLastPosition() == -1)
1485         {
1486             GetFocusObject()->Reset();
1487
1488             m_caretPosition = -1;
1489             PositionCaret();
1490             SetDefaultStyleToCursorStyle();
1491         }
1492
1493         ScrollIntoView(m_caretPosition, WXK_LEFT);
1494
1495         // Always send this event; wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED will be sent only if there is an actual deletion.
1496         {
1497             wxRichTextEvent cmdEvent(
1498                 wxEVT_COMMAND_RICHTEXT_DELETE,
1499                 GetId());
1500             cmdEvent.SetEventObject(this);
1501             cmdEvent.SetFlags(flags);
1502             cmdEvent.SetPosition(m_caretPosition+1);
1503             cmdEvent.SetContainer(GetFocusObject());
1504             GetEventHandler()->ProcessEvent(cmdEvent);
1505         }
1506
1507         Update();
1508     }
1509
1510     return true;
1511 }
1512
1513 /// Delete content if there is a selection, e.g. when pressing a key.
1514 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
1515 {
1516     if (HasSelection())
1517     {
1518         long pos = m_selection.GetRange().GetStart();
1519         wxRichTextRange range = m_selection.GetRange();
1520
1521         // SelectAll causes more to be selected than doing it interactively,
1522         // and causes a new paragraph to be inserted. So for multiline buffers,
1523         // don't delete the final position.
1524         if (range.GetEnd() == GetLastPosition() && GetNumberOfLines() > 0)
1525             range.SetEnd(range.GetEnd()-1);
1526
1527         GetFocusObject()->DeleteRangeWithUndo(range, this, & GetBuffer());
1528         m_selection.Reset();
1529         m_selectionState = wxRichTextCtrlSelectionState_Normal;
1530
1531         if (newPos)
1532             *newPos = pos-1;
1533         return true;
1534     }
1535     else
1536         return false;
1537 }
1538
1539 /// Keyboard navigation
1540
1541 /*
1542
1543 Left:       left one character
1544 Right:      right one character
1545 Up:         up one line
1546 Down:       down one line
1547 Ctrl-Left:  left one word
1548 Ctrl-Right: right one word
1549 Ctrl-Up:    previous paragraph start
1550 Ctrl-Down:  next start of paragraph
1551 Home:       start of line
1552 End:        end of line
1553 Ctrl-Home:  start of document
1554 Ctrl-End:   end of document
1555 Page-Up:    Up a screen
1556 Page-Down:  Down a screen
1557
1558 Maybe:
1559
1560 Ctrl-Alt-PgUp: Start of window
1561 Ctrl-Alt-PgDn: End of window
1562 F8:         Start selection mode
1563 Esc:        End selection mode
1564
1565 Adding Shift does the above but starts/extends selection.
1566
1567
1568  */
1569
1570 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
1571 {
1572     bool success = false;
1573
1574     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
1575     {
1576         if (flags & wxRICHTEXT_CTRL_DOWN)
1577             success = WordRight(1, flags);
1578         else
1579             success = MoveRight(1, flags);
1580     }
1581     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
1582     {
1583         if (flags & wxRICHTEXT_CTRL_DOWN)
1584             success = WordLeft(1, flags);
1585         else
1586             success = MoveLeft(1, flags);
1587     }
1588     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
1589     {
1590         if (flags & wxRICHTEXT_CTRL_DOWN)
1591             success = MoveToParagraphStart(flags);
1592         else
1593             success = MoveUp(1, flags);
1594     }
1595     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
1596     {
1597         if (flags & wxRICHTEXT_CTRL_DOWN)
1598             success = MoveToParagraphEnd(flags);
1599         else
1600             success = MoveDown(1, flags);
1601     }
1602     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
1603     {
1604         success = PageUp(1, flags);
1605     }
1606     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1607     {
1608         success = PageDown(1, flags);
1609     }
1610     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
1611     {
1612         if (flags & wxRICHTEXT_CTRL_DOWN)
1613             success = MoveHome(flags);
1614         else
1615             success = MoveToLineStart(flags);
1616     }
1617     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
1618     {
1619         if (flags & wxRICHTEXT_CTRL_DOWN)
1620             success = MoveEnd(flags);
1621         else
1622             success = MoveToLineEnd(flags);
1623     }
1624
1625     if (success)
1626     {
1627         ScrollIntoView(m_caretPosition, keyCode);
1628         SetDefaultStyleToCursorStyle();
1629     }
1630
1631     return success;
1632 }
1633
1634 /// Extend the selection. Selections are in caret positions.
1635 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
1636 {
1637     if (flags & wxRICHTEXT_SHIFT_DOWN)
1638     {
1639         if (oldPos == newPos)
1640             return false;
1641
1642         wxRichTextSelection oldSelection = m_selection;
1643
1644         m_selection.SetContainer(GetFocusObject());
1645
1646         wxRichTextRange oldRange;
1647         if (m_selection.IsValid())
1648             oldRange = m_selection.GetRange();
1649         else
1650             oldRange = wxRICHTEXT_NO_SELECTION;
1651         wxRichTextRange newRange;
1652
1653         // If not currently selecting, start selecting
1654         if (oldRange.GetStart() == -2)
1655         {
1656             m_selectionAnchor = oldPos;
1657
1658             if (oldPos > newPos)
1659                 newRange.SetRange(newPos+1, oldPos);
1660             else
1661                 newRange.SetRange(oldPos+1, newPos);
1662         }
1663         else
1664         {
1665             // Always ensure that the selection range start is greater than
1666             // the end.
1667             if (newPos > m_selectionAnchor)
1668                 newRange.SetRange(m_selectionAnchor+1, newPos);
1669             else if (newPos == m_selectionAnchor)
1670                 newRange = wxRichTextRange(-2, -2);
1671             else
1672                 newRange.SetRange(newPos+1, m_selectionAnchor);
1673         }
1674
1675         m_selection.SetRange(newRange);
1676
1677         RefreshForSelectionChange(oldSelection, m_selection);
1678
1679         if (newRange.GetStart() > newRange.GetEnd())
1680         {
1681             wxLogDebug(wxT("Strange selection range"));
1682         }
1683
1684         return true;
1685     }
1686     else
1687         return false;
1688 }
1689
1690 /// Scroll into view, returning true if we scrolled.
1691 /// This takes a _caret_ position.
1692 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1693 {
1694     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1695
1696     if (!line)
1697         return false;
1698
1699     int ppuX, ppuY;
1700     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1701
1702     int startXUnits, startYUnits;
1703     GetViewStart(& startXUnits, & startYUnits);
1704     int startY = startYUnits * ppuY;
1705
1706     int sx = 0, sy = 0;
1707     GetVirtualSize(& sx, & sy);
1708     int sxUnits = 0;
1709     int syUnits = 0;
1710     if (ppuY != 0)
1711         syUnits = sy/ppuY;
1712
1713     wxRect rect = GetScaledRect(line->GetRect());
1714
1715     bool scrolled = false;
1716
1717     wxSize clientSize = GetClientSize();
1718
1719     int leftMargin, rightMargin, topMargin, bottomMargin;
1720
1721     {
1722         wxClientDC dc(this);
1723         wxRichTextObject::GetTotalMargin(dc, & GetBuffer(), GetBuffer().GetAttributes(), leftMargin, rightMargin,
1724             topMargin, bottomMargin);
1725     }
1726     clientSize.y -= (int) (0.5 + bottomMargin * GetScale());
1727
1728     if (GetWindowStyle() & wxRE_CENTRE_CARET)
1729     {
1730         int y = rect.y - GetClientSize().y/2;
1731         int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1732         if (y >= 0 && (y + clientSize.y) < (int) (0.5 + GetBuffer().GetCachedSize().y * GetScale()))
1733         {
1734             if (startYUnits != yUnits)
1735             {
1736                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1737                 scrolled = true;
1738             }
1739 #if !wxRICHTEXT_USE_OWN_CARET
1740             if (scrolled)
1741 #endif
1742                 PositionCaret();
1743
1744             return scrolled;
1745         }
1746     }
1747
1748     // Going down
1749     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1750         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1751         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1752         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1753     {
1754         if ((rect.y + rect.height) > (clientSize.y + startY))
1755         {
1756             // Make it scroll so this item is at the bottom
1757             // of the window
1758             int y = rect.y - (clientSize.y - rect.height);
1759             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1760
1761             // If we're still off the screen, scroll another line down
1762             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1763                 yUnits ++;
1764
1765             if (startYUnits != yUnits)
1766             {
1767                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1768                 scrolled = true;
1769             }
1770         }
1771         else if (rect.y < (startY + (int) (0.5 + GetBuffer().GetTopMargin() * GetScale())))
1772         {
1773             // Make it scroll so this item is at the top
1774             // of the window
1775             int y = rect.y - (int) (0.5 + GetBuffer().GetTopMargin() * GetScale());
1776             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1777
1778             if (startYUnits != yUnits)
1779             {
1780                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1781                 scrolled = true;
1782             }
1783         }
1784     }
1785     // Going up
1786     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1787              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1788              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1789              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1790     {
1791         if (rect.y < (startY + (int) (0.5 + GetBuffer().GetBottomMargin() * GetScale())))
1792         {
1793             // Make it scroll so this item is at the top
1794             // of the window
1795             int y = rect.y - (int) (0.5 + GetBuffer().GetTopMargin() * GetScale());
1796             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1797
1798             if (startYUnits != yUnits)
1799             {
1800                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1801                 scrolled = true;
1802             }
1803         }
1804         else if ((rect.y + rect.height) > (clientSize.y + startY))
1805         {
1806             // Make it scroll so this item is at the bottom
1807             // of the window
1808             int y = rect.y - (clientSize.y - rect.height);
1809             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1810
1811             // If we're still off the screen, scroll another line down
1812             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1813                 yUnits ++;
1814
1815             if (startYUnits != yUnits)
1816             {
1817                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1818                 scrolled = true;
1819             }
1820         }
1821     }
1822
1823 #if !wxRICHTEXT_USE_OWN_CARET
1824     if (scrolled)
1825 #endif
1826         PositionCaret();
1827
1828     return scrolled;
1829 }
1830
1831 /// Is the given position visible on the screen?
1832 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1833 {
1834     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1835
1836     if (!line)
1837         return false;
1838
1839     int ppuX, ppuY;
1840     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1841
1842     int startX, startY;
1843     GetViewStart(& startX, & startY);
1844     startX = 0;
1845     startY = startY * ppuY;
1846
1847     wxRect rect = GetScaledRect(line->GetRect());
1848     wxSize clientSize = GetClientSize();
1849     clientSize.y -= (int) (0.5 + GetBuffer().GetBottomMargin() * GetScale());
1850
1851     return (rect.GetTop() >= (startY + (int) (0.5 + GetBuffer().GetTopMargin() * GetScale()))) &&
1852            (rect.GetBottom() <= (startY + clientSize.y));
1853 }
1854
1855 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1856 {
1857     m_caretPosition = position;
1858     m_caretAtLineStart = showAtLineStart;
1859 }
1860
1861 /// Move caret one visual step forward: this may mean setting a flag
1862 /// and keeping the same position if we're going from the end of one line
1863 /// to the start of the next, which may be the exact same caret position.
1864 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1865 {
1866     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(oldPosition);
1867
1868     // Only do the check if we're not at the end of the paragraph (where things work OK
1869     // anyway)
1870     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1871     {
1872         wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(oldPosition);
1873
1874         if (line)
1875         {
1876             wxRichTextRange lineRange = line->GetAbsoluteRange();
1877
1878             // We're at the end of a line. See whether we need to
1879             // stay at the same actual caret position but change visual
1880             // position, or not.
1881             if (oldPosition == lineRange.GetEnd())
1882             {
1883                 if (m_caretAtLineStart)
1884                 {
1885                     // We're already at the start of the line, so actually move on now.
1886                     m_caretPosition = oldPosition + 1;
1887                     m_caretAtLineStart = false;
1888                 }
1889                 else
1890                 {
1891                     // We're showing at the end of the line, so keep to
1892                     // the same position but indicate that we're to show
1893                     // at the start of the next line.
1894                     m_caretPosition = oldPosition;
1895                     m_caretAtLineStart = true;
1896                 }
1897                 SetDefaultStyleToCursorStyle();
1898                 return;
1899             }
1900         }
1901     }
1902     m_caretPosition ++;
1903     SetDefaultStyleToCursorStyle();
1904 }
1905
1906 /// Move caret one visual step backward: this may mean setting a flag
1907 /// and keeping the same position if we're going from the end of one line
1908 /// to the start of the next, which may be the exact same caret position.
1909 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1910 {
1911     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(oldPosition);
1912
1913     // Only do the check if we're not at the start of the paragraph (where things work OK
1914     // anyway)
1915     if (para && (oldPosition != para->GetRange().GetStart()))
1916     {
1917         wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(oldPosition);
1918
1919         if (line)
1920         {
1921             wxRichTextRange lineRange = line->GetAbsoluteRange();
1922
1923             // We're at the start of a line. See whether we need to
1924             // stay at the same actual caret position but change visual
1925             // position, or not.
1926             if (oldPosition == lineRange.GetStart())
1927             {
1928                 m_caretPosition = oldPosition-1;
1929                 m_caretAtLineStart = true;
1930                 return;
1931             }
1932             else if (oldPosition == lineRange.GetEnd())
1933             {
1934                 if (m_caretAtLineStart)
1935                 {
1936                     // We're at the start of the line, so keep the same caret position
1937                     // but clear the start-of-line flag.
1938                     m_caretPosition = oldPosition;
1939                     m_caretAtLineStart = false;
1940                 }
1941                 else
1942                 {
1943                     // We're showing at the end of the line, so go back
1944                     // to the previous character position.
1945                     m_caretPosition = oldPosition - 1;
1946                 }
1947                 SetDefaultStyleToCursorStyle();
1948                 return;
1949             }
1950         }
1951     }
1952     m_caretPosition --;
1953     SetDefaultStyleToCursorStyle();
1954 }
1955
1956 /// Move right
1957 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1958 {
1959     long endPos = GetFocusObject()->GetOwnRange().GetEnd();
1960
1961     if (m_caretPosition + noPositions < endPos)
1962     {
1963         long oldPos = m_caretPosition;
1964         long newPos = m_caretPosition + noPositions;
1965
1966         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1967         if (!extendSel)
1968             SelectNone();
1969
1970         // Determine by looking at oldPos and m_caretPosition whether
1971         // we moved from the end of a line to the start of the next line, in which case
1972         // we want to adjust the caret position such that it is positioned at the
1973         // start of the next line, rather than jumping past the first character of the
1974         // line.
1975         if (noPositions == 1)
1976             MoveCaretForward(oldPos);
1977         else
1978             SetCaretPosition(newPos);
1979
1980         PositionCaret();
1981         SetDefaultStyleToCursorStyle();
1982
1983         return true;
1984     }
1985     else
1986         return false;
1987 }
1988
1989 /// Move left
1990 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1991 {
1992     long startPos = -1;
1993
1994     if (m_caretPosition > startPos - noPositions + 1)
1995     {
1996         long oldPos = m_caretPosition;
1997         long newPos = m_caretPosition - noPositions;
1998         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1999         if (!extendSel)
2000             SelectNone();
2001
2002         if (noPositions == 1)
2003             MoveCaretBack(oldPos);
2004         else
2005             SetCaretPosition(newPos);
2006
2007         PositionCaret();
2008         SetDefaultStyleToCursorStyle();
2009
2010         return true;
2011     }
2012     else
2013         return false;
2014 }
2015
2016 // Find the caret position for the combination of hit-test flags and character position.
2017 // Returns the caret position and also an indication of where to place the caret (caretLineStart)
2018 // since this is ambiguous (same position used for end of line and start of next).
2019 long wxRichTextCtrl::FindCaretPositionForCharacterPosition(long position, int hitTestFlags, wxRichTextParagraphLayoutBox* container,
2020                                                    bool& caretLineStart)
2021 {
2022     // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
2023     // we want to be at the end of the last line but with m_caretAtLineStart set to true,
2024     // so we view the caret at the start of the line.
2025     caretLineStart = false;
2026     long caretPosition = position;
2027
2028     if (hitTestFlags & wxRICHTEXT_HITTEST_BEFORE)
2029     {
2030         wxRichTextLine* thisLine = container->GetLineAtPosition(position-1);
2031         wxRichTextRange lineRange;
2032         if (thisLine)
2033             lineRange = thisLine->GetAbsoluteRange();
2034
2035         if (thisLine && (position-1) == lineRange.GetEnd())
2036         {
2037             caretPosition --;
2038             caretLineStart = true;
2039         }
2040         else
2041         {
2042             wxRichTextParagraph* para = container->GetParagraphAtPosition(position);
2043             if (para && para->GetRange().GetStart() == position)
2044                 caretPosition --;
2045         }
2046     }
2047     return caretPosition;
2048 }
2049
2050 /// Move up
2051 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
2052 {
2053     return MoveDown(- noLines, flags);
2054 }
2055
2056 /// Move up
2057 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
2058 {
2059     if (!GetCaret())
2060         return false;
2061
2062     long lineNumber = GetFocusObject()->GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
2063     wxPoint pt = GetCaret()->GetPosition();
2064     long newLine = lineNumber + noLines;
2065     bool notInThisObject = false;
2066
2067     if (lineNumber != -1)
2068     {
2069         if (noLines > 0)
2070         {
2071             long lastLine = GetFocusObject()->GetVisibleLineNumber(GetFocusObject()->GetOwnRange().GetEnd());
2072             if (newLine > lastLine)
2073                 notInThisObject = true;
2074         }
2075         else
2076         {
2077             if (newLine < 0)
2078                 notInThisObject = true;
2079         }
2080     }
2081
2082     wxRichTextParagraphLayoutBox* container = GetFocusObject();
2083     int hitTestFlags = wxRICHTEXT_HITTEST_NO_NESTED_OBJECTS|wxRICHTEXT_HITTEST_NO_FLOATING_OBJECTS|wxRICHTEXT_HITTEST_HONOUR_ATOMIC;
2084
2085     if (notInThisObject)
2086     {
2087         // If we know we're navigating out of the current object,
2088         // try to find an object anywhere in the buffer at the new position (up or down a bit)
2089         container = & GetBuffer();
2090         hitTestFlags &= ~wxRICHTEXT_HITTEST_NO_NESTED_OBJECTS;
2091
2092         if (noLines > 0) // going down
2093         {
2094             pt.y = GetFocusObject()->GetPosition().y + GetFocusObject()->GetCachedSize().y + 2;
2095         }
2096         else // going up
2097         {
2098             pt.y = GetFocusObject()->GetPosition().y - 2;
2099         }
2100     }
2101     else
2102     {
2103         wxRichTextLine* lineObj = GetFocusObject()->GetLineForVisibleLineNumber(newLine);
2104         if (lineObj)
2105             pt.y = lineObj->GetAbsolutePosition().y + 2;
2106         else
2107             return false;
2108     }
2109
2110     long newPos = 0;
2111     wxClientDC dc(this);
2112     PrepareDC(dc);
2113     dc.SetFont(GetFont());
2114
2115     wxRichTextObject* hitObj = NULL;
2116     wxRichTextObject* contextObj = NULL;
2117     wxRichTextDrawingContext context(& GetBuffer());
2118     int hitTest = container->HitTest(dc, context, pt, newPos, & hitObj, & contextObj, hitTestFlags);
2119
2120     if (hitObj &&
2121         ((hitTest & wxRICHTEXT_HITTEST_NONE) == 0) &&
2122         (! (hitObj == (& m_buffer) && ((hitTest & wxRICHTEXT_HITTEST_OUTSIDE) != 0))) // outside the buffer counts as 'do nothing'
2123         )
2124     {
2125         if (notInThisObject)
2126         {
2127             wxRichTextParagraphLayoutBox* actualContainer = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
2128             if (actualContainer && actualContainer != GetFocusObject() && actualContainer->AcceptsFocus())
2129             {
2130                 SetFocusObject(actualContainer, false /* don't set caret position yet */);
2131
2132                 container = actualContainer;
2133             }
2134         }
2135
2136         bool caretLineStart = true;
2137         long caretPosition = FindCaretPositionForCharacterPosition(newPos, hitTest, container, caretLineStart);
2138         long newSelEnd = caretPosition;
2139         bool extendSel;
2140
2141         if (notInThisObject)
2142             extendSel = false;
2143         else
2144             extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
2145
2146         if (!extendSel)
2147             SelectNone();
2148
2149         SetCaretPosition(caretPosition, caretLineStart);
2150         PositionCaret();
2151         SetDefaultStyleToCursorStyle();
2152
2153         return true;
2154     }
2155
2156     return false;
2157 }
2158
2159 /// Move to the end of the paragraph
2160 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
2161 {
2162     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(m_caretPosition, true);
2163     if (para)
2164     {
2165         long newPos = para->GetRange().GetEnd() - 1;
2166         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
2167         if (!extendSel)
2168             SelectNone();
2169
2170         SetCaretPosition(newPos);
2171         PositionCaret();
2172         SetDefaultStyleToCursorStyle();
2173
2174         return true;
2175     }
2176
2177     return false;
2178 }
2179
2180 /// Move to the start of the paragraph
2181 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
2182 {
2183     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(m_caretPosition, true);
2184     if (para)
2185     {
2186         long newPos = para->GetRange().GetStart() - 1;
2187         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
2188         if (!extendSel)
2189             SelectNone();
2190
2191         SetCaretPosition(newPos, true);
2192         PositionCaret();
2193         SetDefaultStyleToCursorStyle();
2194
2195         return true;
2196     }
2197
2198     return false;
2199 }
2200
2201 /// Move to the end of the line
2202 bool wxRichTextCtrl::MoveToLineEnd(int flags)
2203 {
2204     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
2205
2206     if (line)
2207     {
2208         wxRichTextRange lineRange = line->GetAbsoluteRange();
2209         long newPos = lineRange.GetEnd();
2210         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
2211         if (!extendSel)
2212             SelectNone();
2213
2214         SetCaretPosition(newPos);
2215         PositionCaret();
2216         SetDefaultStyleToCursorStyle();
2217
2218         return true;
2219     }
2220
2221     return false;
2222 }
2223
2224 /// Move to the start of the line
2225 bool wxRichTextCtrl::MoveToLineStart(int flags)
2226 {
2227     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
2228     if (line)
2229     {
2230         wxRichTextRange lineRange = line->GetAbsoluteRange();
2231         long newPos = lineRange.GetStart()-1;
2232
2233         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
2234         if (!extendSel)
2235             SelectNone();
2236
2237         wxRichTextParagraph* para = GetFocusObject()->GetParagraphForLine(line);
2238
2239         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
2240         PositionCaret();
2241         SetDefaultStyleToCursorStyle();
2242
2243         return true;
2244     }
2245
2246     return false;
2247 }
2248
2249 /// Move to the start of the buffer
2250 bool wxRichTextCtrl::MoveHome(int flags)
2251 {
2252     if (m_caretPosition != -1)
2253     {
2254         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
2255         if (!extendSel)
2256             SelectNone();
2257
2258         SetCaretPosition(-1);
2259         PositionCaret();
2260         SetDefaultStyleToCursorStyle();
2261
2262         return true;
2263     }
2264     else
2265         return false;
2266 }
2267
2268 /// Move to the end of the buffer
2269 bool wxRichTextCtrl::MoveEnd(int flags)
2270 {
2271     long endPos = GetFocusObject()->GetOwnRange().GetEnd()-1;
2272
2273     if (m_caretPosition != endPos)
2274     {
2275         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
2276         if (!extendSel)
2277             SelectNone();
2278
2279         SetCaretPosition(endPos);
2280         PositionCaret();
2281         SetDefaultStyleToCursorStyle();
2282
2283         return true;
2284     }
2285     else
2286         return false;
2287 }
2288
2289 /// Move noPages pages up
2290 bool wxRichTextCtrl::PageUp(int noPages, int flags)
2291 {
2292     return PageDown(- noPages, flags);
2293 }
2294
2295 /// Move noPages pages down
2296 bool wxRichTextCtrl::PageDown(int noPages, int flags)
2297 {
2298     // Calculate which line occurs noPages * screen height further down.
2299     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
2300     if (line)
2301     {
2302         wxSize clientSize = GetClientSize();
2303         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
2304
2305         wxRichTextLine* newLine = GetFocusObject()->GetLineAtYPosition(newY);
2306         if (newLine)
2307         {
2308             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
2309             long pos = lineRange.GetStart()-1;
2310             if (pos != m_caretPosition)
2311             {
2312                 wxRichTextParagraph* para = GetFocusObject()->GetParagraphForLine(newLine);
2313
2314                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
2315                 if (!extendSel)
2316                     SelectNone();
2317
2318                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
2319                 PositionCaret();
2320                 SetDefaultStyleToCursorStyle();
2321
2322                 return true;
2323             }
2324         }
2325     }
2326
2327     return false;
2328 }
2329
2330 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
2331 {
2332     return str == wxT(" ") || str == wxT("\t") || (!str.empty() && (str[0] == (wxChar) 160));
2333 }
2334
2335 // Finds the caret position for the next word
2336 long wxRichTextCtrl::FindNextWordPosition(int direction) const
2337 {
2338     long endPos = GetFocusObject()->GetOwnRange().GetEnd();
2339
2340     if (direction > 0)
2341     {
2342         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
2343
2344         // First skip current text to space
2345         while (i < endPos && i > -1)
2346         {
2347             // i is in character, not caret positions
2348             wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(i, i));
2349             wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(i, false);
2350             if (line && (i == line->GetAbsoluteRange().GetEnd()))
2351             {
2352                 break;
2353             }
2354             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
2355                 i += direction;
2356             else
2357             {
2358                 break;
2359             }
2360         }
2361         while (i < endPos && i > -1)
2362         {
2363             // i is in character, not caret positions
2364             wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(i, i));
2365             wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(i, false);
2366             if (line && (i == line->GetAbsoluteRange().GetEnd()))
2367                 return wxMax(-1, i);
2368
2369             if (text.empty()) // End of paragraph, or maybe an image
2370                 return wxMax(-1, i - 1);
2371             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
2372                 i += direction;
2373             else
2374             {
2375                 // Convert to caret position
2376                 return wxMax(-1, i - 1);
2377             }
2378         }
2379         if (i >= endPos)
2380             return endPos-1;
2381         return i-1;
2382     }
2383     else
2384     {
2385         long i = m_caretPosition;
2386
2387         // First skip white space
2388         while (i < endPos && i > -1)
2389         {
2390             // i is in character, not caret positions
2391             wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(i, i));
2392             wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(i, false);
2393
2394             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
2395                 break;
2396             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
2397                 i += direction;
2398             else
2399                 break;
2400         }
2401         // Next skip current text to space
2402         while (i < endPos && i > -1)
2403         {
2404             // i is in character, not caret positions
2405             wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(i, i));
2406             wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(i, false);
2407             if (line && line->GetAbsoluteRange().GetStart() == i)
2408                 return i-1;
2409
2410             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
2411                 i += direction;
2412             else
2413             {
2414                 return i;
2415             }
2416         }
2417         if (i < -1)
2418             return -1;
2419         return i;
2420     }
2421 }
2422
2423 /// Move n words left
2424 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
2425 {
2426     long pos = FindNextWordPosition(-1);
2427     if (pos != m_caretPosition)
2428     {
2429         wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(pos, true);
2430
2431         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
2432         if (!extendSel)
2433             SelectNone();
2434
2435         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
2436         PositionCaret();
2437         SetDefaultStyleToCursorStyle();
2438
2439         return true;
2440     }
2441
2442     return false;
2443 }
2444
2445 /// Move n words right
2446 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
2447 {
2448     long pos = FindNextWordPosition(1);
2449     if (pos != m_caretPosition)
2450     {
2451         wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(pos, true);
2452
2453         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
2454         if (!extendSel)
2455             SelectNone();
2456
2457         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
2458         PositionCaret();
2459         SetDefaultStyleToCursorStyle();
2460
2461         return true;
2462     }
2463
2464     return false;
2465 }
2466
2467 /// Sizing
2468 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
2469 {
2470     // Only do sizing optimization for large buffers
2471     if (GetBuffer().GetOwnRange().GetEnd() > m_delayedLayoutThreshold)
2472     {
2473         m_fullLayoutRequired = true;
2474         m_fullLayoutTime = wxGetLocalTimeMillis();
2475         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
2476         LayoutContent(true /* onlyVisibleRect */);
2477     }
2478     else
2479         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2480
2481 #if wxRICHTEXT_BUFFERED_PAINTING
2482     RecreateBuffer();
2483 #endif
2484
2485     event.Skip();
2486 }
2487
2488 // Force any pending layout due to large buffer
2489 void wxRichTextCtrl::ForceDelayedLayout()
2490 {
2491     if (m_fullLayoutRequired)
2492     {
2493         m_fullLayoutRequired = false;
2494         m_fullLayoutTime = 0;
2495         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2496         ShowPosition(m_fullLayoutSavedPosition);
2497         Refresh(false);
2498         Update();
2499     }
2500 }
2501
2502 /// Idle-time processing
2503 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
2504 {
2505 #if wxRICHTEXT_USE_OWN_CARET
2506     if (((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
2507     {
2508         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate(false);
2509         PositionCaret();
2510         GetCaret()->Show();
2511     }
2512 #endif
2513
2514     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
2515
2516     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
2517     {
2518         m_fullLayoutRequired = false;
2519         m_fullLayoutTime = 0;
2520         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2521         ShowPosition(m_fullLayoutSavedPosition);
2522         Refresh(false);
2523     }
2524
2525     if (m_caretPositionForDefaultStyle != -2)
2526     {
2527         // If the caret position has changed, no longer reflect the default style
2528         // in the UI.
2529         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
2530             m_caretPositionForDefaultStyle = -2;
2531     }
2532
2533     event.Skip();
2534 }
2535
2536 /// Scrolling
2537 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
2538 {
2539 #if wxRICHTEXT_USE_OWN_CARET
2540     if (!((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
2541     {
2542         GetCaret()->Hide();
2543         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate();
2544     }
2545 #endif
2546
2547     event.Skip();
2548 }
2549
2550 /// Set up scrollbars, e.g. after a resize
2551 void wxRichTextCtrl::SetupScrollbars(bool atTop)
2552 {
2553     if (IsFrozen())
2554         return;
2555
2556     if (GetBuffer().IsEmpty() || !m_verticalScrollbarEnabled)
2557     {
2558         SetScrollbars(0, 0, 0, 0, 0, 0);
2559         return;
2560     }
2561
2562     // TODO: reimplement scrolling so we scroll by line, not by fixed number
2563     // of pixels. See e.g. wxVScrolledWindow for ideas.
2564     int pixelsPerUnit = 5;
2565     wxSize clientSize = GetClientSize();
2566
2567     int maxHeight = (int) (0.5 + GetScale() * (GetBuffer().GetCachedSize().y + GetBuffer().GetTopMargin()));
2568
2569     // Round up so we have at least maxHeight pixels
2570     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
2571
2572     int startX = 0, startY = 0;
2573     if (!atTop)
2574         GetViewStart(& startX, & startY);
2575
2576     int maxPositionX = 0;
2577     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
2578
2579     int newStartX = wxMin(maxPositionX, startX);
2580     int newStartY = wxMin(maxPositionY, startY);
2581
2582     int oldPPUX, oldPPUY;
2583     int oldStartX, oldStartY;
2584     int oldVirtualSizeX = 0, oldVirtualSizeY = 0;
2585     GetScrollPixelsPerUnit(& oldPPUX, & oldPPUY);
2586     GetViewStart(& oldStartX, & oldStartY);
2587     GetVirtualSize(& oldVirtualSizeX, & oldVirtualSizeY);
2588     if (oldPPUY > 0)
2589         oldVirtualSizeY /= oldPPUY;
2590
2591     if (oldPPUX == 0 && oldPPUY == pixelsPerUnit && oldVirtualSizeY == unitsY && oldStartX == newStartX && oldStartY == newStartY)
2592         return;
2593
2594     // Don't set scrollbars if there were none before, and there will be none now.
2595     if (oldPPUY != 0 && (oldVirtualSizeY*oldPPUY < clientSize.y) && (unitsY*pixelsPerUnit < clientSize.y))
2596         return;
2597
2598     // Move to previous scroll position if
2599     // possible
2600     SetScrollbars(0, pixelsPerUnit, 0, unitsY, newStartX, newStartY);
2601 }
2602
2603 /// Paint the background
2604 void wxRichTextCtrl::PaintBackground(wxDC& dc)
2605 {
2606     wxColour backgroundColour = GetBackgroundColour();
2607     if (!backgroundColour.IsOk())
2608         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
2609
2610     // Clear the background
2611     dc.SetBrush(wxBrush(backgroundColour));
2612     dc.SetPen(*wxTRANSPARENT_PEN);
2613     wxRect windowRect(GetClientSize());
2614     windowRect.x -= 2; windowRect.y -= 2;
2615     windowRect.width += 4; windowRect.height += 4;
2616
2617     // We need to shift the rectangle to take into account
2618     // scrolling. Converting device to logical coordinates.
2619     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
2620     dc.DrawRectangle(windowRect);
2621 }
2622
2623 #if wxRICHTEXT_BUFFERED_PAINTING
2624 /// Recreate buffer bitmap if necessary
2625 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
2626 {
2627     wxSize sz = size;
2628     if (sz == wxDefaultSize)
2629         sz = GetClientSize();
2630
2631     if (sz.x < 1 || sz.y < 1)
2632         return false;
2633
2634     if (!m_bufferBitmap.IsOk() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
2635         m_bufferBitmap = wxBitmap(sz.x, sz.y);
2636     return m_bufferBitmap.IsOk();
2637 }
2638 #endif
2639
2640 // ----------------------------------------------------------------------------
2641 // file IO functions
2642 // ----------------------------------------------------------------------------
2643
2644 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
2645 {
2646     SetFocusObject(& GetBuffer(), true);
2647
2648     bool success = GetBuffer().LoadFile(filename, (wxRichTextFileType)fileType);
2649     if (success)
2650         m_filename = filename;
2651
2652     DiscardEdits();
2653     SetInsertionPoint(0);
2654     LayoutContent();
2655     PositionCaret();
2656     SetupScrollbars(true);
2657     Refresh(false);
2658     wxTextCtrl::SendTextUpdatedEvent(this);
2659
2660     if (success)
2661         return true;
2662     else
2663     {
2664         wxLogError(_("File couldn't be loaded."));
2665
2666         return false;
2667     }
2668 }
2669
2670 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
2671 {
2672     if (GetBuffer().SaveFile(filename, (wxRichTextFileType)fileType))
2673     {
2674         m_filename = filename;
2675
2676         DiscardEdits();
2677
2678         return true;
2679     }
2680
2681     wxLogError(_("The text couldn't be saved."));
2682
2683     return false;
2684 }
2685
2686 // ----------------------------------------------------------------------------
2687 // wxRichTextCtrl specific functionality
2688 // ----------------------------------------------------------------------------
2689
2690 /// Add a new paragraph of text to the end of the buffer
2691 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
2692 {
2693     wxRichTextRange range = GetFocusObject()->AddParagraph(text);
2694     GetBuffer().Invalidate();
2695     LayoutContent();
2696     return range;
2697 }
2698
2699 /// Add an image
2700 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
2701 {
2702     wxRichTextRange range = GetFocusObject()->AddImage(image);
2703     GetBuffer().Invalidate();
2704     LayoutContent();
2705     return range;
2706 }
2707
2708 // ----------------------------------------------------------------------------
2709 // selection and ranges
2710 // ----------------------------------------------------------------------------
2711
2712 /// Select none
2713 void wxRichTextCtrl::SelectNone()
2714 {
2715     if (m_selection.IsValid())
2716     {
2717         wxRichTextSelection oldSelection = m_selection;
2718
2719         m_selection.Reset();
2720
2721         RefreshForSelectionChange(oldSelection, m_selection);
2722     }
2723     m_selectionAnchor = -2;
2724     m_selectionAnchorObject = NULL;
2725     m_selectionState = wxRichTextCtrlSelectionState_Normal;
2726 }
2727
2728 static bool wxIsWordDelimiter(const wxString& text)
2729 {
2730     return !text.IsEmpty() && !wxIsalnum(text[0]);
2731 }
2732
2733 /// Select the word at the given character position
2734 bool wxRichTextCtrl::SelectWord(long position)
2735 {
2736     if (position < 0 || position > GetFocusObject()->GetOwnRange().GetEnd())
2737         return false;
2738
2739     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(position);
2740     if (!para)
2741         return false;
2742
2743     if (position == para->GetRange().GetEnd())
2744         position --;
2745
2746     long positionStart = position;
2747     long positionEnd = position;
2748
2749     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
2750     {
2751         wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(positionStart, positionStart));
2752         if (wxIsWordDelimiter(text))
2753         {
2754             positionStart ++;
2755             break;
2756         }
2757     }
2758     if (positionStart < para->GetRange().GetStart())
2759         positionStart = para->GetRange().GetStart();
2760
2761     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
2762     {
2763         wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
2764         if (wxIsWordDelimiter(text))
2765         {
2766             positionEnd --;
2767             break;
2768         }
2769     }
2770     if (positionEnd >= para->GetRange().GetEnd())
2771         positionEnd = para->GetRange().GetEnd();
2772
2773     if (positionEnd < positionStart)
2774         return false;
2775
2776     SetSelection(positionStart, positionEnd+1);
2777
2778     if (positionStart >= 0)
2779     {
2780         MoveCaret(positionStart-1, true);
2781         SetDefaultStyleToCursorStyle();
2782     }
2783
2784     return true;
2785 }
2786
2787 wxString wxRichTextCtrl::GetStringSelection() const
2788 {
2789     long from, to;
2790     GetSelection(&from, &to);
2791
2792     return GetRange(from, to);
2793 }
2794
2795 // ----------------------------------------------------------------------------
2796 // hit testing
2797 // ----------------------------------------------------------------------------
2798
2799 wxTextCtrlHitTestResult
2800 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2801 {
2802     // implement in terms of the other overload as the native ports typically
2803     // can get the position and not (x, y) pair directly (although wxUniv
2804     // directly gets x and y -- and so overrides this method as well)
2805     long pos;
2806     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2807
2808     if ( rc != wxTE_HT_UNKNOWN )
2809     {
2810         PositionToXY(pos, x, y);
2811     }
2812
2813     return rc;
2814 }
2815
2816 wxTextCtrlHitTestResult
2817 wxRichTextCtrl::HitTest(const wxPoint& pt,
2818                         long * pos) const
2819 {
2820     wxClientDC dc((wxRichTextCtrl*) this);
2821     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2822
2823     // Buffer uses logical position (relative to start of buffer)
2824     // so convert
2825     wxPoint pt2 = GetLogicalPoint(pt);
2826
2827     wxRichTextObject* hitObj = NULL;
2828     wxRichTextObject* contextObj = NULL;
2829     wxRichTextDrawingContext context((wxRichTextBuffer*) & GetBuffer());
2830     int hit = ((wxRichTextCtrl*)this)->GetFocusObject()->HitTest(dc, context, pt2, *pos, & hitObj, & contextObj, wxRICHTEXT_HITTEST_NO_NESTED_OBJECTS);
2831
2832     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2833         return wxTE_HT_BEFORE;
2834     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2835         return wxTE_HT_BEYOND;
2836     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2837         return wxTE_HT_ON_TEXT;
2838
2839     return wxTE_HT_UNKNOWN;
2840 }
2841
2842 wxRichTextParagraphLayoutBox*
2843 wxRichTextCtrl::FindContainerAtPoint(const wxPoint pt, long& position, int& hit, wxRichTextObject* hitObj, int flags/* = 0*/)
2844 {
2845     wxClientDC dc(this);
2846     PrepareDC(dc);
2847     dc.SetFont(GetFont());
2848
2849     wxPoint logicalPt = GetLogicalPoint(pt);
2850
2851     wxRichTextObject* contextObj = NULL;
2852     wxRichTextDrawingContext context(& GetBuffer());
2853     hit = GetBuffer().HitTest(dc, context, GetUnscaledPoint(logicalPt), position, &hitObj, &contextObj, flags);
2854     wxRichTextParagraphLayoutBox* container = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
2855
2856     return container;
2857 }
2858
2859
2860 // ----------------------------------------------------------------------------
2861 // set/get the controls text
2862 // ----------------------------------------------------------------------------
2863
2864 wxString wxRichTextCtrl::DoGetValue() const
2865 {
2866     return GetBuffer().GetText();
2867 }
2868
2869 wxString wxRichTextCtrl::GetRange(long from, long to) const
2870 {
2871     // Public API for range is different from internals
2872     return GetFocusObject()->GetTextForRange(wxRichTextRange(from, to-1));
2873 }
2874
2875 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2876 {
2877     // Don't call Clear here, since it always sends a text updated event
2878     m_buffer.ResetAndClearCommands();
2879     m_buffer.Invalidate(wxRICHTEXT_ALL);
2880     m_caretPosition = -1;
2881     m_caretPositionForDefaultStyle = -2;
2882     m_caretAtLineStart = false;
2883     m_selection.Reset();
2884     m_selectionState = wxRichTextCtrlSelectionState_Normal;
2885
2886     Scroll(0,0);
2887
2888     if (!IsFrozen())
2889     {
2890         LayoutContent();
2891         Refresh(false);
2892     }
2893
2894     if (!value.IsEmpty())
2895     {
2896         // Remove empty paragraph
2897         GetBuffer().Clear();
2898         DoWriteText(value, flags);
2899
2900         // for compatibility, don't move the cursor when doing SetValue()
2901         SetInsertionPoint(0);
2902     }
2903     else
2904     {
2905         // still send an event for consistency
2906         if (flags & SetValue_SendEvent)
2907             wxTextCtrl::SendTextUpdatedEvent(this);
2908     }
2909     DiscardEdits();
2910 }
2911
2912 void wxRichTextCtrl::WriteText(const wxString& value)
2913 {
2914     DoWriteText(value);
2915 }
2916
2917 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2918 {
2919     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2920
2921     GetFocusObject()->InsertTextWithUndo(& GetBuffer(), m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2922     GetBuffer().Defragment();
2923
2924     if ( flags & SetValue_SendEvent )
2925         wxTextCtrl::SendTextUpdatedEvent(this);
2926 }
2927
2928 void wxRichTextCtrl::AppendText(const wxString& text)
2929 {
2930     SetInsertionPointEnd();
2931
2932     WriteText(text);
2933 }
2934
2935 /// Write an image at the current insertion point
2936 bool wxRichTextCtrl::WriteImage(const wxImage& image, wxBitmapType bitmapType, const wxRichTextAttr& textAttr)
2937 {
2938     wxRichTextImageBlock imageBlock;
2939
2940     wxImage image2 = image;
2941     if (imageBlock.MakeImageBlock(image2, bitmapType))
2942         return WriteImage(imageBlock, textAttr);
2943
2944     return false;
2945 }
2946
2947 bool wxRichTextCtrl::WriteImage(const wxString& filename, wxBitmapType bitmapType, const wxRichTextAttr& textAttr)
2948 {
2949     wxRichTextImageBlock imageBlock;
2950
2951     wxImage image;
2952     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2953         return WriteImage(imageBlock, textAttr);
2954
2955     return false;
2956 }
2957
2958 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock, const wxRichTextAttr& textAttr)
2959 {
2960     return GetFocusObject()->InsertImageWithUndo(& GetBuffer(), m_caretPosition+1, imageBlock, this, 0, textAttr);
2961 }
2962
2963 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, wxBitmapType bitmapType, const wxRichTextAttr& textAttr)
2964 {
2965     if (bitmap.IsOk())
2966     {
2967         wxRichTextImageBlock imageBlock;
2968
2969         wxImage image = bitmap.ConvertToImage();
2970         if (image.IsOk() && imageBlock.MakeImageBlock(image, bitmapType))
2971             return WriteImage(imageBlock, textAttr);
2972     }
2973
2974     return false;
2975 }
2976
2977 // Write a text box at the current insertion point.
2978 wxRichTextBox* wxRichTextCtrl::WriteTextBox(const wxRichTextAttr& textAttr)
2979 {
2980     wxRichTextBox* textBox = new wxRichTextBox;
2981     textBox->SetAttributes(textAttr);
2982     textBox->SetParent(& GetBuffer()); // set parent temporarily for AddParagraph to use correct style
2983     textBox->AddParagraph(wxEmptyString);
2984     textBox->SetParent(NULL);
2985
2986     // The object returned is the one actually inserted into the buffer,
2987     // while the original one is deleted.
2988     wxRichTextObject* obj = GetFocusObject()->InsertObjectWithUndo(& GetBuffer(), m_caretPosition+1, textBox, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2989     wxRichTextBox* box = wxDynamicCast(obj, wxRichTextBox);
2990     return box;
2991 }
2992
2993 wxRichTextField* wxRichTextCtrl::WriteField(const wxString& fieldType, const wxRichTextProperties& properties,
2994                             const wxRichTextAttr& textAttr)
2995 {
2996     return GetFocusObject()->InsertFieldWithUndo(& GetBuffer(), m_caretPosition+1, fieldType, properties,
2997                 this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE, textAttr);
2998 }
2999
3000 // Write a table at the current insertion point, returning the table.
3001 wxRichTextTable* wxRichTextCtrl::WriteTable(int rows, int cols, const wxRichTextAttr& tableAttr, const wxRichTextAttr& cellAttr)
3002 {
3003     wxASSERT(rows > 0 && cols > 0);
3004
3005     if (rows <= 0 || cols <= 0)
3006         return NULL;
3007
3008     wxRichTextTable* table = new wxRichTextTable;
3009     table->SetAttributes(tableAttr);
3010     table->SetParent(& GetBuffer()); // set parent temporarily for AddParagraph to use correct style
3011
3012     table->CreateTable(rows, cols);
3013
3014     table->SetParent(NULL);
3015
3016     int i, j;
3017     for (j = 0; j < rows; j++)
3018     {
3019         for (i = 0; i < cols; i++)
3020         {
3021             table->GetCell(j, i)->GetAttributes() = cellAttr;
3022         }
3023     }
3024
3025     // The object returned is the one actually inserted into the buffer,
3026     // while the original one is deleted.
3027     wxRichTextObject* obj = GetFocusObject()->InsertObjectWithUndo(& GetBuffer(), m_caretPosition+1, table, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
3028     wxRichTextTable* tableResult = wxDynamicCast(obj, wxRichTextTable);
3029     return tableResult;
3030 }
3031
3032
3033 /// Insert a newline (actually paragraph) at the current insertion point.
3034 bool wxRichTextCtrl::Newline()
3035 {
3036     return GetFocusObject()->InsertNewlineWithUndo(& GetBuffer(), m_caretPosition+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
3037 }
3038
3039 /// Insert a line break at the current insertion point.
3040 bool wxRichTextCtrl::LineBreak()
3041 {
3042     wxString text;
3043     text = wxRichTextLineBreakChar;
3044     return GetFocusObject()->InsertTextWithUndo(& GetBuffer(), m_caretPosition+1, text, this);
3045 }
3046
3047 // ----------------------------------------------------------------------------
3048 // Clipboard operations
3049 // ----------------------------------------------------------------------------
3050
3051 void wxRichTextCtrl::Copy()
3052 {
3053     if (CanCopy())
3054     {
3055         wxRichTextRange range = GetInternalSelectionRange();
3056         GetBuffer().CopyToClipboard(range);
3057     }
3058 }
3059
3060 void wxRichTextCtrl::Cut()
3061 {
3062     if (CanCut())
3063     {
3064         wxRichTextRange range = GetInternalSelectionRange();
3065         GetBuffer().CopyToClipboard(range);
3066
3067         DeleteSelectedContent();
3068         LayoutContent();
3069         Refresh(false);
3070     }
3071 }
3072
3073 void wxRichTextCtrl::Paste()
3074 {
3075     if (CanPaste())
3076     {
3077         BeginBatchUndo(_("Paste"));
3078
3079         long newPos = m_caretPosition;
3080         DeleteSelectedContent(& newPos);
3081
3082         GetBuffer().PasteFromClipboard(newPos);
3083
3084         EndBatchUndo();
3085     }
3086 }
3087
3088 void wxRichTextCtrl::DeleteSelection()
3089 {
3090     if (CanDeleteSelection())
3091     {
3092         DeleteSelectedContent();
3093     }
3094 }
3095
3096 bool wxRichTextCtrl::HasSelection() const
3097 {
3098     return (m_selection.IsValid() && m_selection.GetContainer() == GetFocusObject());
3099 }
3100
3101 bool wxRichTextCtrl::HasUnfocusedSelection() const
3102 {
3103     return m_selection.IsValid();
3104 }
3105
3106 bool wxRichTextCtrl::CanCopy() const
3107 {
3108     // Can copy if there's a selection
3109     return HasSelection();
3110 }
3111
3112 bool wxRichTextCtrl::CanCut() const
3113 {
3114     return CanDeleteSelection();
3115 }
3116
3117 bool wxRichTextCtrl::CanPaste() const
3118 {
3119     if ( !IsEditable() || !GetFocusObject() || !CanInsertContent(* GetFocusObject(), m_caretPosition+1))
3120         return false;
3121
3122     return GetBuffer().CanPasteFromClipboard();
3123 }
3124
3125 bool wxRichTextCtrl::CanDeleteSelection() const
3126 {
3127     return HasSelection() && IsEditable() && CanDeleteRange(* GetFocusObject(), GetSelectionRange());
3128 }
3129
3130
3131 // ----------------------------------------------------------------------------
3132 // Accessors
3133 // ----------------------------------------------------------------------------
3134
3135 void wxRichTextCtrl::SetContextMenu(wxMenu* menu)
3136 {
3137     if (m_contextMenu && m_contextMenu != menu)
3138         delete m_contextMenu;
3139     m_contextMenu = menu;
3140 }
3141
3142 void wxRichTextCtrl::SetEditable(bool editable)
3143 {
3144     m_editable = editable;
3145 }
3146
3147 void wxRichTextCtrl::SetInsertionPoint(long pos)
3148 {
3149     SelectNone();
3150
3151     m_caretPosition = pos - 1;
3152     m_caretAtLineStart = true;
3153
3154     PositionCaret();
3155
3156     SetDefaultStyleToCursorStyle();
3157 }
3158
3159 void wxRichTextCtrl::SetInsertionPointEnd()
3160 {
3161     long pos = GetLastPosition();
3162     SetInsertionPoint(pos);
3163 }
3164
3165 long wxRichTextCtrl::GetInsertionPoint() const
3166 {
3167     return m_caretPosition+1;
3168 }
3169
3170 wxTextPos wxRichTextCtrl::GetLastPosition() const
3171 {
3172     return GetFocusObject()->GetOwnRange().GetEnd();
3173 }
3174
3175 // If the return values from and to are the same, there is no
3176 // selection.
3177 void wxRichTextCtrl::GetSelection(long* from, long* to) const
3178 {
3179     if (m_selection.IsValid())
3180     {
3181         *from = m_selection.GetRange().GetStart();
3182         *to = m_selection.GetRange().GetEnd();
3183         (*to) ++;
3184     }
3185     else
3186     {
3187         *from = -2;
3188         *to = -2;
3189     }
3190 }
3191
3192 bool wxRichTextCtrl::IsEditable() const
3193 {
3194     return m_editable;
3195 }
3196
3197 // ----------------------------------------------------------------------------
3198 // selection
3199 // ----------------------------------------------------------------------------
3200
3201 void wxRichTextCtrl::SetSelection(long from, long to)
3202 {
3203     // if from and to are both -1, it means (in wxWidgets) that all text should
3204     // be selected.
3205     if ( (from == -1) && (to == -1) )
3206     {
3207         from = 0;
3208         to = GetLastPosition()+1;
3209     }
3210
3211     if (from == to)
3212     {
3213         SelectNone();
3214     }
3215     else
3216     {
3217         wxRichTextSelection oldSelection = m_selection;
3218
3219         m_selectionAnchor = from-1;
3220         m_selectionAnchorObject = NULL;
3221         m_selection.Set(wxRichTextRange(from, to-1), GetFocusObject());
3222
3223         m_caretPosition = wxMax(-1, to-1);
3224
3225         RefreshForSelectionChange(oldSelection, m_selection);
3226         PositionCaret();
3227     }
3228 }
3229
3230 // ----------------------------------------------------------------------------
3231 // Editing
3232 // ----------------------------------------------------------------------------
3233
3234 void wxRichTextCtrl::Replace(long from, long to,
3235                              const wxString& value)
3236 {
3237     BeginBatchUndo(_("Replace"));
3238
3239     SetSelection(from, to);
3240
3241     wxRichTextAttr attr = GetDefaultStyle();
3242
3243     DeleteSelectedContent();
3244
3245     SetDefaultStyle(attr);
3246
3247     if (!value.IsEmpty())
3248         DoWriteText(value, SetValue_SelectionOnly);
3249
3250     EndBatchUndo();
3251 }
3252
3253 void wxRichTextCtrl::Remove(long from, long to)
3254 {
3255     SelectNone();
3256
3257     GetFocusObject()->DeleteRangeWithUndo(wxRichTextRange(from, to-1), this, & GetBuffer());
3258
3259     LayoutContent();
3260     if (!IsFrozen())
3261         Refresh(false);
3262 }
3263
3264 bool wxRichTextCtrl::IsModified() const
3265 {
3266     return m_buffer.IsModified();
3267 }
3268
3269 void wxRichTextCtrl::MarkDirty()
3270 {
3271     m_buffer.Modify(true);
3272 }
3273
3274 void wxRichTextCtrl::DiscardEdits()
3275 {
3276     m_caretPositionForDefaultStyle = -2;
3277     m_buffer.Modify(false);
3278     m_buffer.GetCommandProcessor()->ClearCommands();
3279 }
3280
3281 int wxRichTextCtrl::GetNumberOfLines() const
3282 {
3283     return GetFocusObject()->GetParagraphCount();
3284 }
3285
3286 // ----------------------------------------------------------------------------
3287 // Positions <-> coords
3288 // ----------------------------------------------------------------------------
3289
3290 long wxRichTextCtrl::XYToPosition(long x, long y) const
3291 {
3292     return GetFocusObject()->XYToPosition(x, y);
3293 }
3294
3295 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
3296 {
3297     return GetFocusObject()->PositionToXY(pos, x, y);
3298 }
3299
3300 // ----------------------------------------------------------------------------
3301 //
3302 // ----------------------------------------------------------------------------
3303
3304 void wxRichTextCtrl::ShowPosition(long pos)
3305 {
3306     if (!IsPositionVisible(pos))
3307         ScrollIntoView(pos-1, WXK_DOWN);
3308 }
3309
3310 int wxRichTextCtrl::GetLineLength(long lineNo) const
3311 {
3312     return GetFocusObject()->GetParagraphLength(lineNo);
3313 }
3314
3315 wxString wxRichTextCtrl::GetLineText(long lineNo) const
3316 {
3317     return GetFocusObject()->GetParagraphText(lineNo);
3318 }
3319
3320 // ----------------------------------------------------------------------------
3321 // Undo/redo
3322 // ----------------------------------------------------------------------------
3323
3324 void wxRichTextCtrl::Undo()
3325 {
3326     if (CanUndo())
3327     {
3328         GetCommandProcessor()->Undo();
3329     }
3330 }
3331
3332 void wxRichTextCtrl::Redo()
3333 {
3334     if (CanRedo())
3335     {
3336         GetCommandProcessor()->Redo();
3337     }
3338 }
3339
3340 bool wxRichTextCtrl::CanUndo() const
3341 {
3342     return GetCommandProcessor()->CanUndo() && IsEditable();
3343 }
3344
3345 bool wxRichTextCtrl::CanRedo() const
3346 {
3347     return GetCommandProcessor()->CanRedo() && IsEditable();
3348 }
3349
3350 // ----------------------------------------------------------------------------
3351 // implementation details
3352 // ----------------------------------------------------------------------------
3353
3354 void wxRichTextCtrl::Command(wxCommandEvent& event)
3355 {
3356     SetValue(event.GetString());
3357     GetEventHandler()->ProcessEvent(event);
3358 }
3359
3360 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
3361 {
3362     // By default, load the first file into the text window.
3363     if (event.GetNumberOfFiles() > 0)
3364     {
3365         LoadFile(event.GetFiles()[0]);
3366     }
3367 }
3368
3369 wxSize wxRichTextCtrl::DoGetBestSize() const
3370 {
3371     return wxSize(10, 10);
3372 }
3373
3374 // ----------------------------------------------------------------------------
3375 // standard handlers for standard edit menu events
3376 // ----------------------------------------------------------------------------
3377
3378 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
3379 {
3380     Cut();
3381 }
3382
3383 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
3384 {
3385     DeleteSelection();
3386 }
3387
3388 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
3389 {
3390     Copy();
3391 }
3392
3393 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
3394 {
3395     Paste();
3396 }
3397
3398 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
3399 {
3400     Undo();
3401 }
3402
3403 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
3404 {
3405     Redo();
3406 }
3407
3408 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
3409 {
3410     event.Enable( CanCut() );
3411 }
3412
3413 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
3414 {
3415     event.Enable( CanCopy() );
3416 }
3417
3418 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
3419 {
3420     event.Enable( CanDeleteSelection() );
3421 }
3422
3423 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
3424 {
3425     event.Enable( CanPaste() );
3426 }
3427
3428 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
3429 {
3430     event.Enable( CanUndo() );
3431     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
3432 }
3433
3434 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
3435 {
3436     event.Enable( CanRedo() );
3437     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
3438 }
3439
3440 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
3441 {
3442     if (GetLastPosition() > 0)
3443         SelectAll();
3444 }
3445
3446 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
3447 {
3448     event.Enable(GetLastPosition() > 0);
3449 }
3450
3451 void wxRichTextCtrl::OnProperties(wxCommandEvent& event)
3452 {
3453     int idx = event.GetId() - wxID_RICHTEXT_PROPERTIES1;
3454     if (idx >= 0 && idx < m_contextMenuPropertiesInfo.GetCount())
3455     {
3456         wxRichTextObject* obj = m_contextMenuPropertiesInfo.GetObject(idx);
3457         if (obj && CanEditProperties(obj))
3458             EditProperties(obj, this);
3459
3460         m_contextMenuPropertiesInfo.Clear();
3461     }
3462 }
3463
3464 void wxRichTextCtrl::OnUpdateProperties(wxUpdateUIEvent& event)
3465 {
3466     int idx = event.GetId() - wxID_RICHTEXT_PROPERTIES1;
3467     event.Enable(idx >= 0 && idx < m_contextMenuPropertiesInfo.GetCount());
3468 }
3469
3470 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
3471 {
3472     if (event.GetEventObject() != this)
3473     {
3474         event.Skip();
3475         return;
3476     }
3477
3478     ShowContextMenu(m_contextMenu, event.GetPosition());
3479 }
3480
3481 // Prepares the context menu, adding appropriate property-editing commands.
3482 // Returns the number of property commands added.
3483 int wxRichTextCtrl::PrepareContextMenu(wxMenu* menu, const wxPoint& pt, bool addPropertyCommands)
3484 {
3485     wxClientDC dc(this);
3486     PrepareDC(dc);
3487     dc.SetFont(GetFont());
3488
3489     m_contextMenuPropertiesInfo.Clear();
3490
3491     long position = 0;
3492     wxRichTextObject* hitObj = NULL;
3493     wxRichTextObject* contextObj = NULL;
3494     if (pt != wxDefaultPosition)
3495     {
3496         wxPoint logicalPt = GetLogicalPoint(ScreenToClient(pt));
3497         wxRichTextDrawingContext context(& GetBuffer());
3498         int hit = GetBuffer().HitTest(dc, context, GetUnscaledPoint(logicalPt), position, & hitObj, & contextObj);
3499
3500         if (hit == wxRICHTEXT_HITTEST_ON || hit == wxRICHTEXT_HITTEST_BEFORE || hit == wxRICHTEXT_HITTEST_AFTER)
3501         {
3502             wxRichTextParagraphLayoutBox* actualContainer = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
3503             if (hitObj && actualContainer)
3504             {
3505                 if (actualContainer->AcceptsFocus())
3506                 {
3507                     SetFocusObject(actualContainer, false /* don't set caret position yet */);
3508                     SetCaretPositionAfterClick(actualContainer, position, hit);
3509                 }
3510
3511                 if (addPropertyCommands)
3512                     m_contextMenuPropertiesInfo.AddItems(this, actualContainer, hitObj);
3513             }
3514             else
3515             {
3516                 if (addPropertyCommands)
3517                     m_contextMenuPropertiesInfo.AddItems(this, GetFocusObject(), NULL);
3518             }
3519         }
3520         else
3521         {
3522             if (addPropertyCommands)
3523                 m_contextMenuPropertiesInfo.AddItems(this, GetFocusObject(), NULL);
3524         }
3525     }
3526     else
3527     {
3528         // Invoked from the keyboard, so don't set the caret position and don't use the event
3529         // position
3530         hitObj = GetFocusObject()->GetLeafObjectAtPosition(m_caretPosition+1);
3531         if (hitObj)
3532             contextObj = hitObj->GetParentContainer();
3533         else
3534             contextObj = GetFocusObject();
3535
3536         wxRichTextParagraphLayoutBox* actualContainer = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
3537         if (hitObj && actualContainer)
3538         {
3539             if (addPropertyCommands)
3540                 m_contextMenuPropertiesInfo.AddItems(this, actualContainer, hitObj);
3541         }
3542         else
3543         {
3544             if (addPropertyCommands)
3545                 m_contextMenuPropertiesInfo.AddItems(this, GetFocusObject(), NULL);
3546         }
3547     }
3548
3549     if (menu)
3550     {
3551         if (addPropertyCommands)
3552             m_contextMenuPropertiesInfo.AddMenuItems(menu);
3553         return m_contextMenuPropertiesInfo.GetCount();
3554     }
3555     else
3556         return 0;
3557 }
3558
3559 // Shows the context menu, adding appropriate property-editing commands
3560 bool wxRichTextCtrl::ShowContextMenu(wxMenu* menu, const wxPoint& pt, bool addPropertyCommands)
3561 {
3562     if (menu)
3563     {
3564         PrepareContextMenu(menu, pt, addPropertyCommands);
3565         PopupMenu(menu);
3566         return true;
3567     }
3568     else
3569         return false;
3570 }
3571
3572 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
3573 {
3574     return GetFocusObject()->SetStyle(wxRichTextRange(start, end-1), wxRichTextAttr(style));
3575 }
3576
3577 bool wxRichTextCtrl::SetStyle(long start, long end, const wxRichTextAttr& style)
3578 {
3579     return GetFocusObject()->SetStyle(wxRichTextRange(start, end-1), style);
3580 }
3581
3582 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxTextAttr& style)
3583 {
3584     return GetFocusObject()->SetStyle(range.ToInternal(), wxRichTextAttr(style));
3585 }
3586
3587 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxRichTextAttr& style)
3588 {
3589     return GetFocusObject()->SetStyle(range.ToInternal(), style);
3590 }
3591
3592 void wxRichTextCtrl::SetStyle(wxRichTextObject *obj, const wxRichTextAttr& textAttr, int flags)
3593 {
3594     GetFocusObject()->SetStyle(obj, textAttr, flags);
3595 }
3596
3597 // extended style setting operation with flags including:
3598 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
3599 // see richtextbuffer.h for more details.
3600
3601 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxRichTextAttr& style, int flags)
3602 {
3603     return GetFocusObject()->SetStyle(range.ToInternal(), style, flags);
3604 }
3605
3606 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
3607 {
3608     return GetBuffer().SetDefaultStyle(style);
3609 }
3610
3611 bool wxRichTextCtrl::SetDefaultStyle(const wxRichTextAttr& style)
3612 {
3613     wxRichTextAttr attr1(style);
3614     attr1.GetTextBoxAttr().Reset();
3615     return GetBuffer().SetDefaultStyle(attr1);
3616 }
3617
3618 const wxRichTextAttr& wxRichTextCtrl::GetDefaultStyleEx() const
3619 {
3620     return GetBuffer().GetDefaultStyle();
3621 }
3622
3623 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
3624 {
3625     wxRichTextAttr attr;
3626     if (GetFocusObject()->GetStyle(position, attr))
3627     {
3628         style = attr;
3629         return true;
3630     }
3631     else
3632         return false;
3633 }
3634
3635 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style)
3636 {
3637     return GetFocusObject()->GetStyle(position, style);
3638 }
3639
3640 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style, wxRichTextParagraphLayoutBox* container)
3641 {
3642     wxRichTextAttr attr;
3643     if (container->GetStyle(position, attr))
3644     {
3645         style = attr;
3646         return true;
3647     }
3648     else
3649         return false;
3650 }
3651
3652 // get the common set of styles for the range
3653 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttr& style)
3654 {
3655     wxRichTextAttr attr;
3656     if (GetFocusObject()->GetStyleForRange(range.ToInternal(), attr))
3657     {
3658         style = attr;
3659         return true;
3660     }
3661     else
3662         return false;
3663 }
3664
3665 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxRichTextAttr& style)
3666 {
3667     return GetFocusObject()->GetStyleForRange(range.ToInternal(), style);
3668 }
3669
3670 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxRichTextAttr& style, wxRichTextParagraphLayoutBox* container)
3671 {
3672     return container->GetStyleForRange(range.ToInternal(), style);
3673 }
3674
3675 /// Get the content (uncombined) attributes for this position.
3676 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style)
3677 {
3678     return GetFocusObject()->GetUncombinedStyle(position, style);
3679 }
3680
3681 /// Get the content (uncombined) attributes for this position.
3682 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style, wxRichTextParagraphLayoutBox* container)
3683 {
3684     return container->GetUncombinedStyle(position, style);
3685 }
3686
3687 bool wxRichTextCtrl::SetProperties(const wxRichTextRange& range, const wxRichTextProperties& properties, int flags)
3688 {
3689     return GetFocusObject()->SetProperties(range.ToInternal(), properties, flags);
3690 }
3691
3692 /// Set font, and also the buffer attributes
3693 bool wxRichTextCtrl::SetFont(const wxFont& font)
3694 {
3695     wxControl::SetFont(font);
3696
3697     wxRichTextAttr attr = GetBuffer().GetAttributes();
3698     attr.SetFont(font);
3699     GetBuffer().SetBasicStyle(attr);
3700
3701     GetBuffer().Invalidate(wxRICHTEXT_ALL);
3702     Refresh(false);
3703
3704     return true;
3705 }
3706
3707 /// Transform logical to physical
3708 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
3709 {
3710     wxPoint pt;
3711     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
3712
3713     return pt;
3714 }
3715
3716 /// Transform physical to logical
3717 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
3718 {
3719     wxPoint pt;
3720     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
3721
3722     return pt;
3723 }
3724
3725 /// Position the caret
3726 void wxRichTextCtrl::PositionCaret(wxRichTextParagraphLayoutBox* container)
3727 {
3728     if (!GetCaret())
3729         return;
3730
3731     //wxLogDebug(wxT("PositionCaret"));
3732
3733     wxRect caretRect;
3734     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect, container))
3735     {
3736         caretRect = GetScaledRect(caretRect);
3737         int topMargin = (int) (0.5 + GetScale()*GetBuffer().GetTopMargin());
3738         int bottomMargin = (int) (0.5 + GetScale()*GetBuffer().GetBottomMargin());
3739         wxPoint newPt = caretRect.GetPosition();
3740         wxSize newSz = caretRect.GetSize();
3741         wxPoint pt = GetPhysicalPoint(newPt);
3742         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
3743         {
3744             GetCaret()->Hide();
3745             if (GetCaret()->GetSize() != newSz)
3746                 GetCaret()->SetSize(newSz);
3747
3748             // Adjust size so the caret size and position doesn't appear in the margins
3749             if (((pt.y + newSz.y) <= topMargin) || (pt.y >= (GetClientSize().y - bottomMargin)))
3750             {
3751                 pt.x = -200;
3752                 pt.y = -200;
3753             }
3754             else if (pt.y < topMargin && (pt.y + newSz.y) > topMargin)
3755             {
3756                 newSz.y -= (topMargin - pt.y);
3757                 if (newSz.y > 0)
3758                 {
3759                     pt.y = topMargin;
3760                     GetCaret()->SetSize(newSz);
3761                 }
3762             }
3763             else if (pt.y < (GetClientSize().y - bottomMargin) && (pt.y + newSz.y) > (GetClientSize().y - bottomMargin))
3764             {
3765                 newSz.y = GetClientSize().y - bottomMargin - pt.y;
3766                 GetCaret()->SetSize(newSz);
3767             }
3768
3769             GetCaret()->Move(pt);
3770             GetCaret()->Show();
3771         }
3772     }
3773 }
3774
3775 /// Get the caret height and position for the given character position
3776 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect, wxRichTextParagraphLayoutBox* container)
3777 {
3778     wxClientDC dc(this);
3779     PrepareDC(dc);
3780     dc.SetUserScale(GetScale(), GetScale());
3781     dc.SetFont(GetFont());
3782
3783     wxPoint pt;
3784     int height = 0;
3785
3786     if (!container)
3787         container = GetFocusObject();
3788
3789     wxRichTextDrawingContext context(& GetBuffer());
3790     if (container->FindPosition(dc, context, position, pt, & height, m_caretAtLineStart))
3791     {
3792         // Caret height can't be zero
3793         if (height == 0)
3794             height = dc.GetCharHeight();
3795
3796         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
3797         return true;
3798     }
3799
3800     return false;
3801 }
3802
3803 /// Gets the line for the visible caret position. If the caret is
3804 /// shown at the very end of the line, it means the next character is actually
3805 /// on the following line. So let's get the line we're expecting to find
3806 /// if this is the case.
3807 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
3808 {
3809     wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(caretPosition, true);
3810     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(caretPosition, true);
3811     if (line)
3812     {
3813         wxRichTextRange lineRange = line->GetAbsoluteRange();
3814         if (caretPosition == lineRange.GetStart()-1 &&
3815             (para->GetRange().GetStart() != lineRange.GetStart()))
3816         {
3817             if (!m_caretAtLineStart)
3818                 line = GetFocusObject()->GetLineAtPosition(caretPosition-1, true);
3819         }
3820     }
3821     return line;
3822 }
3823
3824
3825 /// Move the caret to the given character position
3826 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart, wxRichTextParagraphLayoutBox* container)
3827 {
3828     if (GetBuffer().IsDirty())
3829         LayoutContent();
3830
3831     if (!container)
3832         container = GetFocusObject();
3833
3834     if (pos <= container->GetOwnRange().GetEnd())
3835     {
3836         SetCaretPosition(pos, showAtLineStart);
3837
3838         PositionCaret(container);
3839
3840         return true;
3841     }
3842     else
3843         return false;
3844 }
3845
3846 /// Layout the buffer: which we must do before certain operations, such as
3847 /// setting the caret position.
3848 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
3849 {
3850     if (GetBuffer().IsDirty() || onlyVisibleRect)
3851     {
3852         wxRect availableSpace(GetUnscaledSize(GetClientSize()));
3853         if (availableSpace.width == 0)
3854             availableSpace.width = 10;
3855         if (availableSpace.height == 0)
3856             availableSpace.height = 10;
3857
3858         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
3859         if (onlyVisibleRect)
3860         {
3861             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
3862             availableSpace.SetPosition(GetUnscaledPoint(GetLogicalPoint(wxPoint(0, 0))));
3863         }
3864
3865         wxClientDC dc(this);
3866
3867         PrepareDC(dc);
3868         dc.SetFont(GetFont());
3869
3870         wxRichTextDrawingContext context(& GetBuffer());
3871         GetBuffer().Defragment();
3872         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
3873         GetBuffer().Layout(dc, context, availableSpace, availableSpace, flags);
3874         GetBuffer().Invalidate(wxRICHTEXT_NONE);
3875
3876         if (!IsFrozen() && !onlyVisibleRect)
3877             SetupScrollbars();
3878     }
3879
3880     return true;
3881 }
3882
3883 /// Is all of the selection, or the current caret position, bold?
3884 bool wxRichTextCtrl::IsSelectionBold()
3885 {
3886     if (HasSelection())
3887     {
3888         wxRichTextAttr attr;
3889         wxRichTextRange range = GetSelectionRange();
3890         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3891         attr.SetFontWeight(wxFONTWEIGHT_BOLD);
3892
3893         return HasCharacterAttributes(range, attr);
3894     }
3895     else
3896     {
3897         // If no selection, then we need to combine current style with default style
3898         // to see what the effect would be if we started typing.
3899         wxRichTextAttr attr;
3900         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3901
3902         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3903         if (GetStyle(pos, attr))
3904         {
3905             if (IsDefaultStyleShowing())
3906                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3907             return attr.GetFontWeight() == wxFONTWEIGHT_BOLD;
3908         }
3909     }
3910     return false;
3911 }
3912
3913 /// Is all of the selection, or the current caret position, italics?
3914 bool wxRichTextCtrl::IsSelectionItalics()
3915 {
3916     if (HasSelection())
3917     {
3918         wxRichTextRange range = GetSelectionRange();
3919         wxRichTextAttr attr;
3920         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3921         attr.SetFontStyle(wxFONTSTYLE_ITALIC);
3922
3923         return HasCharacterAttributes(range, attr);
3924     }
3925     else
3926     {
3927         // If no selection, then we need to combine current style with default style
3928         // to see what the effect would be if we started typing.
3929         wxRichTextAttr attr;
3930         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3931
3932         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3933         if (GetStyle(pos, attr))
3934         {
3935             if (IsDefaultStyleShowing())
3936                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3937             return attr.GetFontStyle() == wxFONTSTYLE_ITALIC;
3938         }
3939     }
3940     return false;
3941 }
3942
3943 /// Is all of the selection, or the current caret position, underlined?
3944 bool wxRichTextCtrl::IsSelectionUnderlined()
3945 {
3946     if (HasSelection())
3947     {
3948         wxRichTextRange range = GetSelectionRange();
3949         wxRichTextAttr attr;
3950         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3951         attr.SetFontUnderlined(true);
3952
3953         return HasCharacterAttributes(range, attr);
3954     }
3955     else
3956     {
3957         // If no selection, then we need to combine current style with default style
3958         // to see what the effect would be if we started typing.
3959         wxRichTextAttr attr;
3960         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3961         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3962
3963         if (GetStyle(pos, attr))
3964         {
3965             if (IsDefaultStyleShowing())
3966                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3967             return attr.GetFontUnderlined();
3968         }
3969     }
3970     return false;
3971 }
3972
3973 /// Does all of the selection, or the current caret position, have this wxTextAttrEffects flag(s)?
3974 bool wxRichTextCtrl::DoesSelectionHaveTextEffectFlag(int flag)
3975 {
3976     wxRichTextAttr attr;
3977     attr.SetFlags(wxTEXT_ATTR_EFFECTS);
3978     attr.SetTextEffectFlags(flag);
3979     attr.SetTextEffects(flag);
3980
3981     if (HasSelection())
3982     {
3983         return HasCharacterAttributes(GetSelectionRange(), attr);
3984     }
3985     else
3986     {
3987         // If no selection, then we need to combine current style with default style
3988         // to see what the effect would be if we started typing.
3989         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3990         if (GetStyle(pos, attr))
3991         {
3992             if (IsDefaultStyleShowing())
3993                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3994             return (attr.GetTextEffectFlags() & flag) != 0;
3995         }
3996     }
3997     return false;
3998 }
3999
4000 /// Apply bold to the selection
4001 bool wxRichTextCtrl::ApplyBoldToSelection()
4002 {
4003     wxRichTextAttr attr;
4004     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
4005     attr.SetFontWeight(IsSelectionBold() ? wxFONTWEIGHT_NORMAL : wxFONTWEIGHT_BOLD);
4006
4007     if (HasSelection())
4008         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
4009     else
4010     {
4011         wxRichTextAttr current = GetDefaultStyleEx();
4012         current.Apply(attr);
4013         SetAndShowDefaultStyle(current);
4014     }
4015     return true;
4016 }
4017
4018 /// Apply italic to the selection
4019 bool wxRichTextCtrl::ApplyItalicToSelection()
4020 {
4021     wxRichTextAttr attr;
4022     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
4023     attr.SetFontStyle(IsSelectionItalics() ? wxFONTSTYLE_NORMAL : wxFONTSTYLE_ITALIC);
4024
4025     if (HasSelection())
4026         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
4027     else
4028     {
4029         wxRichTextAttr current = GetDefaultStyleEx();
4030         current.Apply(attr);
4031         SetAndShowDefaultStyle(current);
4032     }
4033     return true;
4034 }
4035
4036 /// Apply underline to the selection
4037 bool wxRichTextCtrl::ApplyUnderlineToSelection()
4038 {
4039     wxRichTextAttr attr;
4040     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
4041     attr.SetFontUnderlined(!IsSelectionUnderlined());
4042
4043     if (HasSelection())
4044         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
4045     else
4046     {
4047         wxRichTextAttr current = GetDefaultStyleEx();
4048         current.Apply(attr);
4049         SetAndShowDefaultStyle(current);
4050     }
4051     return true;
4052 }
4053
4054 /// Apply the wxTextAttrEffects flag(s) to the selection, or the current caret position if there's no selection
4055 bool wxRichTextCtrl::ApplyTextEffectToSelection(int flags)
4056 {
4057     wxRichTextAttr attr;
4058     attr.SetFlags(wxTEXT_ATTR_EFFECTS);
4059     attr.SetTextEffectFlags(flags);
4060     if (!DoesSelectionHaveTextEffectFlag(flags))
4061         attr.SetTextEffects(flags);
4062      else
4063         attr.SetTextEffects(attr.GetTextEffectFlags() & ~flags);
4064
4065     if (HasSelection())
4066         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
4067     else
4068     {
4069         wxRichTextAttr current = GetDefaultStyleEx();
4070         current.Apply(attr);
4071         SetAndShowDefaultStyle(current);
4072     }
4073     return true;
4074 }
4075
4076 /// Is all of the selection aligned according to the specified flag?
4077 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
4078 {
4079     wxRichTextRange range;
4080     if (HasSelection())
4081         range = GetSelectionRange();
4082     else
4083         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
4084
4085     wxRichTextAttr attr;
4086     attr.SetAlignment(alignment);
4087
4088     return HasParagraphAttributes(range, attr);
4089 }
4090
4091 /// Apply alignment to the selection
4092 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
4093 {
4094     wxRichTextAttr attr;
4095     attr.SetAlignment(alignment);
4096     if (HasSelection())
4097         return SetStyle(GetSelectionRange(), attr);
4098     else
4099     {
4100         wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(GetCaretPosition()+1);
4101         if (para)
4102             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
4103     }
4104     return true;
4105 }
4106
4107 /// Apply a named style to the selection
4108 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
4109 {
4110     // Flags are defined within each definition, so only certain
4111     // attributes are applied.
4112     wxRichTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
4113
4114     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_RESET;
4115
4116     if (wxDynamicCast(def, wxRichTextListStyleDefinition))
4117     {
4118         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
4119
4120         wxRichTextRange range;
4121
4122         if (HasSelection())
4123             range = GetSelectionRange();
4124         else
4125         {
4126             long pos = GetAdjustedCaretPosition(GetCaretPosition());
4127             range = wxRichTextRange(pos, pos+1);
4128         }
4129
4130         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
4131     }
4132
4133     bool isPara = false;
4134
4135     // Make sure the attr has the style name
4136     if (wxDynamicCast(def, wxRichTextParagraphStyleDefinition))
4137     {
4138         isPara = true;
4139         attr.SetParagraphStyleName(def->GetName());
4140
4141         // If applying a paragraph style, we only want the paragraph nodes to adopt these
4142         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
4143         // to change its style independently.
4144         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
4145     }
4146     else if (wxDynamicCast(def, wxRichTextCharacterStyleDefinition))
4147         attr.SetCharacterStyleName(def->GetName());
4148     else if (wxDynamicCast(def, wxRichTextBoxStyleDefinition))
4149         attr.GetTextBoxAttr().SetBoxStyleName(def->GetName());
4150
4151     if (wxDynamicCast(def, wxRichTextBoxStyleDefinition))
4152     {
4153         if (GetFocusObject() && (GetFocusObject() != & GetBuffer()))
4154         {
4155             SetStyle(GetFocusObject(), attr);
4156             return true;
4157         }
4158         else
4159             return false;
4160     }
4161     else if (HasSelection())
4162         return SetStyleEx(GetSelectionRange(), attr, flags);
4163     else
4164     {
4165         wxRichTextAttr current = GetDefaultStyleEx();
4166         wxRichTextAttr defaultStyle(attr);
4167         if (isPara)
4168         {
4169             // Don't apply extra character styles since they are already implied
4170             // in the paragraph style
4171             defaultStyle.SetFlags(defaultStyle.GetFlags() & ~wxTEXT_ATTR_CHARACTER);
4172         }
4173         current.Apply(defaultStyle);
4174         SetAndShowDefaultStyle(current);
4175
4176         // If it's a paragraph style, we want to apply the style to the
4177         // current paragraph even if we didn't select any text.
4178         if (isPara)
4179         {
4180             long pos = GetAdjustedCaretPosition(GetCaretPosition());
4181             wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(pos);
4182             if (para)
4183             {
4184                 return SetStyleEx(para->GetRange().FromInternal(), attr, flags);
4185             }
4186         }
4187         return true;
4188     }
4189 }
4190
4191 /// Apply the style sheet to the buffer, for example if the styles have changed.
4192 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
4193 {
4194     if (!styleSheet)
4195         styleSheet = GetBuffer().GetStyleSheet();
4196     if (!styleSheet)
4197         return false;
4198
4199     if (GetBuffer().ApplyStyleSheet(styleSheet))
4200     {
4201         GetBuffer().Invalidate(wxRICHTEXT_ALL);
4202         Refresh(false);
4203         return true;
4204     }
4205     else
4206         return false;
4207 }
4208
4209 /// Sets the default style to the style under the cursor
4210 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
4211 {
4212     wxRichTextAttr attr;
4213     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
4214
4215     // If at the start of a paragraph, use the next position.
4216     long pos = GetAdjustedCaretPosition(GetCaretPosition());
4217
4218     wxRichTextObject* obj = GetFocusObject()->GetLeafObjectAtPosition(pos);
4219     if (obj && obj->IsTopLevel())
4220     {
4221         // Don't use the attributes of a top-level object, since they might apply
4222         // to content of the object, e.g. background colour.
4223         SetDefaultStyle(wxRichTextAttr());
4224         return true;
4225     }
4226     else if (GetUncombinedStyle(pos, attr))
4227     {
4228         SetDefaultStyle(attr);
4229         return true;
4230     }
4231
4232     return false;
4233 }
4234
4235 /// Returns the first visible position in the current view
4236 long wxRichTextCtrl::GetFirstVisiblePosition() const
4237 {
4238     wxRichTextLine* line = GetFocusObject()->GetLineAtYPosition(GetUnscaledPoint(GetLogicalPoint(wxPoint(0, 0))).y);
4239     if (line)
4240         return line->GetAbsoluteRange().GetStart();
4241     else
4242         return 0;
4243 }
4244
4245 /// Get the first visible point in the window
4246 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
4247 {
4248     int ppuX, ppuY;
4249     int startXUnits, startYUnits;
4250
4251     GetScrollPixelsPerUnit(& ppuX, & ppuY);
4252     GetViewStart(& startXUnits, & startYUnits);
4253
4254     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
4255 }
4256
4257 /// The adjusted caret position is the character position adjusted to take
4258 /// into account whether we're at the start of a paragraph, in which case
4259 /// style information should be taken from the next position, not current one.
4260 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
4261 {
4262     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(caretPos+1);
4263
4264     if (para && (caretPos+1 == para->GetRange().GetStart()))
4265         caretPos ++;
4266     return caretPos;
4267 }
4268
4269 /// Get/set the selection range in character positions. -1, -1 means no selection.
4270 /// The range is in API convention, i.e. a single character selection is denoted
4271 /// by (n, n+1)
4272 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
4273 {
4274     wxRichTextRange range = GetInternalSelectionRange();
4275     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
4276         range.SetEnd(range.GetEnd() + 1);
4277     return range;
4278 }
4279
4280 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
4281 {
4282     SetSelection(range.GetStart(), range.GetEnd());
4283 }
4284
4285 /// Set list style
4286 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
4287 {
4288     return GetFocusObject()->SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
4289 }
4290
4291 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
4292 {
4293     return GetFocusObject()->SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
4294 }
4295
4296 /// Clear list for given range
4297 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
4298 {
4299     return GetFocusObject()->ClearListStyle(range.ToInternal(), flags);
4300 }
4301
4302 /// Number/renumber any list elements in the given range
4303 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
4304 {
4305     return GetFocusObject()->NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
4306 }
4307
4308 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
4309 {
4310     return GetFocusObject()->NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
4311 }
4312
4313 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
4314 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
4315 {
4316     return GetFocusObject()->PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
4317 }
4318
4319 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
4320 {
4321     return GetFocusObject()->PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
4322 }
4323
4324 // Given a character position at which there is a list style, find the range
4325 // encompassing the same list style by looking backwards and forwards.
4326 wxRichTextRange wxRichTextCtrl::FindRangeForList(long pos, bool& isNumberedList)
4327 {
4328     wxRichTextParagraphLayoutBox* focusObject = GetFocusObject();
4329     wxRichTextRange range = wxRichTextRange(-1, -1);
4330     wxRichTextParagraph* para = focusObject->GetParagraphAtPosition(pos);
4331     if (!para || !para->GetAttributes().HasListStyleName())
4332         return range;
4333     else
4334     {
4335         wxString listStyle = para->GetAttributes().GetListStyleName();
4336         range = para->GetRange();
4337
4338         isNumberedList = para->GetAttributes().HasBulletNumber();
4339
4340         // Search back
4341         wxRichTextObjectList::compatibility_iterator initialNode = focusObject->GetChildren().Find(para);
4342         if (initialNode)
4343         {
4344             wxRichTextObjectList::compatibility_iterator startNode = initialNode->GetPrevious();
4345             while (startNode)
4346             {
4347                 wxRichTextParagraph* p = wxDynamicCast(startNode->GetData(), wxRichTextParagraph);
4348                 if (p)
4349                 {
4350                     if (!p->GetAttributes().HasListStyleName() || p->GetAttributes().GetListStyleName() != listStyle)
4351                         break;
4352                     else
4353                         range.SetStart(p->GetRange().GetStart());
4354                 }
4355
4356                 startNode = startNode->GetPrevious();
4357             }
4358
4359             // Search forward
4360             wxRichTextObjectList::compatibility_iterator endNode = initialNode->GetNext();
4361             while (endNode)
4362             {
4363                 wxRichTextParagraph* p = wxDynamicCast(endNode->GetData(), wxRichTextParagraph);
4364                 if (p)
4365                 {
4366                     if (!p->GetAttributes().HasListStyleName() || p->GetAttributes().GetListStyleName() != listStyle)
4367                         break;
4368                     else
4369                         range.SetEnd(p->GetRange().GetEnd());
4370                 }
4371
4372                 endNode = endNode->GetNext();
4373             }
4374         }
4375     }
4376     return range;
4377 }
4378
4379 /// Deletes the content in the given range
4380 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
4381 {
4382     return GetFocusObject()->DeleteRangeWithUndo(range.ToInternal(), this, & GetBuffer());
4383 }
4384
4385 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
4386 {
4387     if (sm_availableFontNames.GetCount() == 0)
4388     {
4389         sm_availableFontNames = wxFontEnumerator::GetFacenames();
4390         sm_availableFontNames.Sort();
4391     }
4392     return sm_availableFontNames;
4393 }
4394
4395 void wxRichTextCtrl::ClearAvailableFontNames()
4396 {
4397     sm_availableFontNames.Clear();
4398 }
4399
4400 void wxRichTextCtrl::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
4401 {
4402     //wxLogDebug(wxT("wxRichTextCtrl::OnSysColourChanged"));
4403
4404     wxTextAttrEx basicStyle = GetBasicStyle();
4405     basicStyle.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
4406     SetBasicStyle(basicStyle);
4407     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
4408
4409     Refresh();
4410 }
4411
4412 // Refresh the area affected by a selection change
4413 bool wxRichTextCtrl::RefreshForSelectionChange(const wxRichTextSelection& oldSelection, const wxRichTextSelection& newSelection)
4414 {
4415     // If the selection is not part of the focus object, or we have multiple ranges, then the chances are that
4416     // the selection contains whole containers rather than just text, so refresh everything
4417     // for now as it would be hard to compute the rectangle bounding all selections.
4418     // TODO: improve on this.
4419     if ((oldSelection.IsValid() && (oldSelection.GetContainer() != GetFocusObject() || oldSelection.GetCount() > 1)) ||
4420         (newSelection.IsValid() && (newSelection.GetContainer() != GetFocusObject() || newSelection.GetCount() > 1)))
4421     {
4422         Refresh(false);
4423         return true;
4424     }
4425
4426     wxRichTextRange oldRange, newRange;
4427     if (oldSelection.IsValid())
4428         oldRange = oldSelection.GetRange();
4429     else
4430         oldRange = wxRICHTEXT_NO_SELECTION;
4431     if (newSelection.IsValid())
4432         newRange = newSelection.GetRange();
4433     else
4434         newRange = wxRICHTEXT_NO_SELECTION;
4435
4436     // Calculate the refresh rectangle - just the affected lines
4437     long firstPos, lastPos;
4438     if (oldRange.GetStart() == -2 && newRange.GetStart() != -2)
4439     {
4440         firstPos = newRange.GetStart();
4441         lastPos = newRange.GetEnd();
4442     }
4443     else if (oldRange.GetStart() != -2 && newRange.GetStart() == -2)
4444     {
4445         firstPos = oldRange.GetStart();
4446         lastPos = oldRange.GetEnd();
4447     }
4448     else if (oldRange.GetStart() == -2 && newRange.GetStart() == -2)
4449     {
4450         return false;
4451     }
4452     else
4453     {
4454         firstPos = wxMin(oldRange.GetStart(), newRange.GetStart());
4455         lastPos = wxMax(oldRange.GetEnd(), newRange.GetEnd());
4456     }
4457
4458     wxRichTextLine* firstLine = GetFocusObject()->GetLineAtPosition(firstPos);
4459     wxRichTextLine* lastLine = GetFocusObject()->GetLineAtPosition(lastPos);
4460
4461     if (firstLine && lastLine)
4462     {
4463         wxSize clientSize = GetClientSize();
4464         wxPoint pt1 = GetPhysicalPoint(GetScaledPoint(firstLine->GetAbsolutePosition()));
4465         wxPoint pt2 = GetPhysicalPoint(GetScaledPoint(lastLine->GetAbsolutePosition())) + wxPoint(0, (int) (0.5 + lastLine->GetSize().y * GetScale()));
4466
4467         pt1.x = 0;
4468         pt1.y = wxMax(0, pt1.y);
4469         pt2.x = 0;
4470         pt2.y = wxMin(clientSize.y, pt2.y);
4471
4472         wxRect rect(pt1, wxSize(clientSize.x, pt2.y - pt1.y));
4473         RefreshRect(rect, false);
4474     }
4475     else
4476         Refresh(false);
4477
4478     return true;
4479 }
4480
4481 // margins functions
4482 bool wxRichTextCtrl::DoSetMargins(const wxPoint& pt)
4483 {
4484     GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetLeft().SetValue(pt.x, wxTEXT_ATTR_UNITS_PIXELS);
4485     GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetRight().SetValue(pt.x, wxTEXT_ATTR_UNITS_PIXELS);
4486     GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetTop().SetValue(pt.y, wxTEXT_ATTR_UNITS_PIXELS);
4487     GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetBottom().SetValue(pt.y, wxTEXT_ATTR_UNITS_PIXELS);
4488
4489     return true;
4490 }
4491
4492 wxPoint wxRichTextCtrl::DoGetMargins() const
4493 {
4494     return wxPoint(GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetLeft().GetValue(),
4495                    GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetTop().GetValue());
4496 }
4497
4498 bool wxRichTextCtrl::SetFocusObject(wxRichTextParagraphLayoutBox* obj, bool setCaretPosition)
4499 {
4500     if (obj && !obj->AcceptsFocus())
4501         return false;
4502
4503     wxRichTextParagraphLayoutBox* oldContainer = GetFocusObject();
4504     bool changingContainer = (m_focusObject != obj);
4505
4506     if (changingContainer && HasSelection())
4507         SelectNone();
4508
4509     m_focusObject = obj;
4510
4511     if (!obj)
4512         m_focusObject = & m_buffer;
4513
4514     if (setCaretPosition && changingContainer)
4515     {
4516         m_selection.Reset();
4517         m_selectionAnchor = -2;
4518         m_selectionAnchorObject = NULL;
4519         m_selectionState = wxRichTextCtrlSelectionState_Normal;
4520
4521         long pos = -1;
4522
4523         m_caretAtLineStart = false;
4524         MoveCaret(pos, m_caretAtLineStart);
4525         SetDefaultStyleToCursorStyle();
4526
4527         wxRichTextEvent cmdEvent(
4528             wxEVT_COMMAND_RICHTEXT_FOCUS_OBJECT_CHANGED,
4529             GetId());
4530         cmdEvent.SetEventObject(this);
4531         cmdEvent.SetPosition(m_caretPosition+1);
4532         cmdEvent.SetOldContainer(oldContainer);
4533         cmdEvent.SetContainer(m_focusObject);
4534
4535         GetEventHandler()->ProcessEvent(cmdEvent);
4536     }
4537     return true;
4538 }
4539
4540 #if wxUSE_DRAG_AND_DROP
4541 void wxRichTextCtrl::OnDrop(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxDragResult def, wxDataObject* DataObj)
4542 {
4543     m_preDrag = false;
4544
4545     if ((def != wxDragCopy) && (def != wxDragMove))
4546     {
4547         return;
4548     }
4549
4550     if (!GetSelection().IsValid())
4551     {
4552         return;
4553     }
4554
4555     wxRichTextParagraphLayoutBox* originContainer = GetSelection().GetContainer();
4556     wxRichTextParagraphLayoutBox* destContainer = GetFocusObject(); // This will be the drop container, not necessarily the same as the origin one
4557
4558     wxRichTextBuffer* richTextBuffer = ((wxRichTextBufferDataObject*)DataObj)->GetRichTextBuffer();
4559     if (richTextBuffer)
4560     {
4561         long position = GetCaretPosition();
4562         wxRichTextRange selectionrange = GetInternalSelectionRange();
4563         if (selectionrange.Contains(position) && (def == wxDragMove))
4564         {
4565             // It doesn't make sense to move onto itself
4566             return;
4567         }
4568
4569         // If we're moving, and the data is being moved forward, we need to drop first, then delete the selection
4570         // If moving backwards, we need to delete then drop. If we're copying (or doing nothing) we don't delete anyway
4571         bool DeleteAfter = (def == wxDragMove) && (position > selectionrange.GetEnd());
4572         if ((def == wxDragMove) && !DeleteAfter)
4573         {
4574             // We can't use e.g. DeleteSelectedContent() as it uses the focus container
4575             originContainer->DeleteRangeWithUndo(selectionrange, this, &GetBuffer());
4576         }
4577
4578         destContainer->InsertParagraphsWithUndo(&GetBuffer(), position+1, *richTextBuffer, this, 0);
4579         ShowPosition(position + richTextBuffer->GetOwnRange().GetEnd());
4580
4581         delete richTextBuffer;
4582
4583         if (DeleteAfter)
4584         {
4585             // We can't use e.g. DeleteSelectedContent() as it uses the focus container
4586             originContainer->DeleteRangeWithUndo(selectionrange, this, &GetBuffer());
4587         }
4588
4589         SelectNone();
4590         Refresh();
4591     }
4592 }
4593 #endif // wxUSE_DRAG_AND_DROP
4594
4595
4596 #if wxUSE_DRAG_AND_DROP
4597 bool wxRichTextDropSource::GiveFeedback(wxDragResult WXUNUSED(effect))
4598 {
4599     wxCHECK_MSG(m_rtc, false, wxT("NULL m_rtc"));
4600
4601     long position = 0;
4602     int hit = 0;
4603     wxRichTextObject* hitObj = NULL;
4604     wxRichTextParagraphLayoutBox* container = m_rtc->FindContainerAtPoint(m_rtc->GetUnscaledPoint(m_rtc->ScreenToClient(wxGetMousePosition())), position, hit, hitObj);
4605
4606     if (!(hit & wxRICHTEXT_HITTEST_NONE) && container && container->AcceptsFocus())
4607     {
4608         m_rtc->StoreFocusObject(container);
4609         m_rtc->SetCaretPositionAfterClick(container, position, hit);
4610     }
4611
4612     return false;  // so that the base-class sets a cursor
4613 }
4614 #endif // wxUSE_DRAG_AND_DROP
4615
4616 bool wxRichTextCtrl::CanDeleteRange(wxRichTextParagraphLayoutBox& WXUNUSED(container), const wxRichTextRange& WXUNUSED(range)) const
4617 {
4618     return true;
4619 }
4620
4621 bool wxRichTextCtrl::CanInsertContent(wxRichTextParagraphLayoutBox& WXUNUSED(container), long WXUNUSED(pos)) const
4622 {
4623     return true;
4624 }
4625
4626 void wxRichTextCtrl::EnableVerticalScrollbar(bool enable)
4627 {
4628     m_verticalScrollbarEnabled = enable;
4629     SetupScrollbars();
4630 }
4631
4632 void wxRichTextCtrl::SetFontScale(double fontScale, bool refresh)
4633 {
4634     GetBuffer().SetFontScale(fontScale);
4635     if (refresh)
4636     {
4637         GetBuffer().Invalidate(wxRICHTEXT_ALL);
4638         Refresh();
4639     }
4640 }
4641
4642 void wxRichTextCtrl::SetDimensionScale(double dimScale, bool refresh)
4643 {
4644     GetBuffer().SetDimensionScale(dimScale);
4645     if (refresh)
4646     {
4647         GetBuffer().Invalidate(wxRICHTEXT_ALL);
4648         Refresh();
4649     }
4650 }
4651
4652 // Sets an overall scale factor for displaying and editing the content.
4653 void wxRichTextCtrl::SetScale(double scale, bool refresh)
4654 {
4655     m_scale = scale;
4656     if (refresh)
4657     {
4658         GetBuffer().Invalidate(wxRICHTEXT_ALL);
4659         Refresh();
4660     }
4661 }
4662
4663 // Get an unscaled point
4664 wxPoint wxRichTextCtrl::GetUnscaledPoint(const wxPoint& pt) const
4665 {
4666     if (GetScale() == 1.0)
4667         return pt;
4668     else
4669         return wxPoint((int) (0.5 + double(pt.x) / GetScale()), (int) (0.5 + double(pt.y) / GetScale()));
4670 }
4671
4672 // Get a scaled point
4673 wxPoint wxRichTextCtrl::GetScaledPoint(const wxPoint& pt) const
4674 {
4675     if (GetScale() == 1.0)
4676         return pt;
4677     else
4678         return wxPoint((int) (0.5 + double(pt.x) * GetScale()), (int) (0.5 + double(pt.y) * GetScale()));
4679 }
4680
4681 // Get an unscaled size
4682 wxSize wxRichTextCtrl::GetUnscaledSize(const wxSize& sz) const
4683 {
4684     if (GetScale() == 1.0)
4685         return sz;
4686     else
4687         return wxSize((int) (0.5 + double(sz.x) / GetScale()), (int) (0.5 + double(sz.y) / GetScale()));
4688 }
4689
4690 // Get a scaled size
4691 wxSize wxRichTextCtrl::GetScaledSize(const wxSize& sz) const
4692 {
4693     if (GetScale() == 1.0)
4694         return sz;
4695     else
4696         return wxSize((int) (0.5 + double(sz.x) * GetScale()), (int) (0.5 + double(sz.y) * GetScale()));
4697 }
4698
4699 // Get an unscaled rect
4700 wxRect wxRichTextCtrl::GetUnscaledRect(const wxRect& rect) const
4701 {
4702     if (GetScale() == 1.0)
4703         return rect;
4704     else
4705         return wxRect((int) (0.5 + double(rect.x) / GetScale()), (int) (0.5 + double(rect.y) / GetScale()),
4706                       (int) (0.5 + double(rect.width) / GetScale()), (int) (0.5 + double(rect.height) / GetScale()));
4707 }
4708
4709 // Get a scaled rect
4710 wxRect wxRichTextCtrl::GetScaledRect(const wxRect& rect) const
4711 {
4712     if (GetScale() == 1.0)
4713         return rect;
4714     else
4715         return wxRect((int) (0.5 + double(rect.x) * GetScale()), (int) (0.5 + double(rect.y) * GetScale()),
4716                       (int) (0.5 + double(rect.width) * GetScale()), (int) (0.5 + double(rect.height) * GetScale()));
4717 }
4718
4719 #if wxRICHTEXT_USE_OWN_CARET
4720
4721 // ----------------------------------------------------------------------------
4722 // initialization and destruction
4723 // ----------------------------------------------------------------------------
4724
4725 void wxRichTextCaret::Init()
4726 {
4727     m_hasFocus = true;
4728     m_refreshEnabled = true;
4729
4730     m_xOld =
4731     m_yOld = -1;
4732     m_richTextCtrl = NULL;
4733     m_needsUpdate = false;
4734     m_flashOn = true;
4735 }
4736
4737 wxRichTextCaret::~wxRichTextCaret()
4738 {
4739     if (m_timer.IsRunning())
4740         m_timer.Stop();
4741 }
4742
4743 // ----------------------------------------------------------------------------
4744 // showing/hiding/moving the caret (base class interface)
4745 // ----------------------------------------------------------------------------
4746
4747 void wxRichTextCaret::DoShow()
4748 {
4749     m_flashOn = true;
4750
4751     if (!m_timer.IsRunning())
4752         m_timer.Start(GetBlinkTime());
4753
4754     Refresh();
4755 }
4756
4757 void wxRichTextCaret::DoHide()
4758 {
4759     if (m_timer.IsRunning())
4760         m_timer.Stop();
4761
4762     Refresh();
4763 }
4764
4765 void wxRichTextCaret::DoMove()
4766 {
4767     if (IsVisible())
4768     {
4769         Refresh();
4770
4771         if (m_xOld != -1 && m_yOld != -1)
4772         {
4773             if (m_richTextCtrl && m_refreshEnabled)
4774             {
4775                 wxRect rect(GetPosition(), GetSize());
4776                 m_richTextCtrl->RefreshRect(rect, false);
4777             }
4778         }
4779     }
4780
4781     m_xOld = m_x;
4782     m_yOld = m_y;
4783 }
4784
4785 void wxRichTextCaret::DoSize()
4786 {
4787     int countVisible = m_countVisible;
4788     if (countVisible > 0)
4789     {
4790         m_countVisible = 0;
4791         DoHide();
4792     }
4793
4794     if (countVisible > 0)
4795     {
4796         m_countVisible = countVisible;
4797         DoShow();
4798     }
4799 }
4800
4801 // ----------------------------------------------------------------------------
4802 // handling the focus
4803 // ----------------------------------------------------------------------------
4804
4805 void wxRichTextCaret::OnSetFocus()
4806 {
4807     m_hasFocus = true;
4808
4809     if ( IsVisible() )
4810         Refresh();
4811 }
4812
4813 void wxRichTextCaret::OnKillFocus()
4814 {
4815     m_hasFocus = false;
4816 }
4817
4818 // ----------------------------------------------------------------------------
4819 // drawing the caret
4820 // ----------------------------------------------------------------------------
4821
4822 void wxRichTextCaret::Refresh()
4823 {
4824     if (m_richTextCtrl && m_refreshEnabled)
4825     {
4826         wxRect rect(GetPosition(), GetSize());
4827         m_richTextCtrl->RefreshRect(rect, false);
4828     }
4829 }
4830
4831 void wxRichTextCaret::DoDraw(wxDC *dc)
4832 {
4833     dc->SetPen( *wxBLACK_PEN );
4834
4835     dc->SetBrush(*(m_hasFocus ? wxBLACK_BRUSH : wxTRANSPARENT_BRUSH));
4836     dc->SetPen(*wxBLACK_PEN);
4837
4838     wxPoint pt(m_x, m_y);
4839
4840     if (m_richTextCtrl)
4841     {
4842         pt = m_richTextCtrl->GetLogicalPoint(pt);
4843     }
4844     if (IsVisible() && m_flashOn)
4845         dc->DrawRectangle(pt.x, pt.y, m_width, m_height);
4846 }
4847
4848 void wxRichTextCaret::Notify()
4849 {
4850     m_flashOn = !m_flashOn;
4851     Refresh();
4852 }
4853
4854 void wxRichTextCaretTimer::Notify()
4855 {
4856     m_caret->Notify();
4857 }
4858 #endif
4859     // wxRICHTEXT_USE_OWN_CARET
4860
4861 // Add an item
4862 bool wxRichTextContextMenuPropertiesInfo::AddItem(const wxString& label, wxRichTextObject* obj)
4863 {
4864     if (GetCount() < 3)
4865     {
4866         m_labels.Add(label);
4867         m_objects.Add(obj);
4868         return true;
4869     }
4870     else
4871         return false;
4872 }
4873
4874 // Returns number of menu items were added.
4875 int wxRichTextContextMenuPropertiesInfo::AddMenuItems(wxMenu* menu, int startCmd) const
4876 {
4877     wxMenuItem* item = menu->FindItem(startCmd);
4878     // If none of the standard properties identifiers are in the menu, add them if necessary.
4879     // If no items to add, just set the text to something generic
4880     if (GetCount() == 0)
4881     {
4882         if (item)
4883         {
4884             menu->SetLabel(startCmd, _("&Properties"));
4885
4886             // Delete the others if necessary
4887             int i;
4888             for (i = startCmd+1; i < startCmd+3; i++)
4889             {
4890                 if (menu->FindItem(i))
4891                 {
4892                     menu->Delete(i);
4893                 }
4894             }
4895         }
4896     }
4897     else
4898     {
4899         int i;
4900         int pos = -1;
4901         // Find the position of the first properties item
4902         for (i = 0; i < (int) menu->GetMenuItemCount(); i++)
4903         {
4904             wxMenuItem* item = menu->FindItemByPosition(i);
4905             if (item && item->GetId() == startCmd)
4906             {
4907                 pos = i;
4908                 break;
4909             }
4910         }
4911
4912         if (pos != -1)
4913         {
4914             int insertBefore = pos+1;
4915             for (i = startCmd; i < startCmd+GetCount(); i++)
4916             {
4917                 if (menu->FindItem(i))
4918                 {
4919                     menu->SetLabel(i, m_labels[i - startCmd]);
4920                 }
4921                 else
4922                 {
4923                     if (insertBefore >= (int) menu->GetMenuItemCount())
4924                         menu->Append(i, m_labels[i - startCmd]);
4925                     else
4926                         menu->Insert(insertBefore, i, m_labels[i - startCmd]);
4927                 }
4928                 insertBefore ++;
4929             }
4930
4931             // Delete any old items still left on the menu
4932             for (i = startCmd + GetCount(); i < startCmd+3; i++)
4933             {
4934                 if (menu->FindItem(i))
4935                 {
4936                     menu->Delete(i);
4937                 }
4938             }
4939         }
4940         else
4941         {
4942             // No existing property identifiers were found, so append to the end of the menu.
4943             menu->AppendSeparator();
4944             for (i = startCmd; i < startCmd+GetCount(); i++)
4945             {
4946                 menu->Append(i, m_labels[i - startCmd]);
4947             }
4948         }
4949     }
4950
4951     return GetCount();
4952 }
4953
4954 // Add appropriate menu items for the current container and clicked on object
4955 // (and container's parent, if appropriate).
4956 int wxRichTextContextMenuPropertiesInfo::AddItems(wxRichTextCtrl* ctrl, wxRichTextObject* container, wxRichTextObject* obj)
4957 {
4958     Clear();
4959     if (obj && ctrl->CanEditProperties(obj))
4960         AddItem(ctrl->GetPropertiesMenuLabel(obj), obj);
4961
4962     if (container && container != obj && ctrl->CanEditProperties(container) && m_labels.Index(ctrl->GetPropertiesMenuLabel(container)) == wxNOT_FOUND)
4963         AddItem(ctrl->GetPropertiesMenuLabel(container), container);
4964
4965     if (container && container->GetParent() && ctrl->CanEditProperties(container->GetParent()) && m_labels.Index(ctrl->GetPropertiesMenuLabel(container->GetParent())) == wxNOT_FOUND)
4966         AddItem(ctrl->GetPropertiesMenuLabel(container->GetParent()), container->GetParent());
4967
4968     return GetCount();
4969 }
4970
4971 #endif
4972     // wxUSE_RICHTEXT