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 (!IsEditable())
1134             {
1135                 return;
1136             }
1137
1138             if (HasSelection() && !CanDeleteRange(* GetFocusObject(), GetSelectionRange()))
1139             {
1140                 return;
1141             }
1142
1143             BeginBatchUndo(_("Delete Text"));
1144
1145             long newPos = m_caretPosition;
1146
1147             bool processed = DeleteSelectedContent(& newPos);
1148
1149             int deletions = 0;
1150             if (processed)
1151                 deletions ++;
1152
1153             // Submit range in character positions, which are greater than caret positions,
1154             // so subtract 1 for deleted character and add 1 for conversion to character position.
1155             if (newPos > -1)
1156             {
1157                 if (event.CmdDown())
1158                 {
1159                     long pos = wxRichTextCtrl::FindNextWordPosition(-1);
1160                     if (pos < newPos)
1161                     {
1162                         wxRichTextRange range(pos+1, newPos);
1163                         if (CanDeleteRange(* GetFocusObject(), range.FromInternal()))
1164                         {
1165                             GetFocusObject()->DeleteRangeWithUndo(range, this, & GetBuffer());
1166                             deletions ++;
1167                         }
1168                         processed = true;
1169                     }
1170                 }
1171
1172                 if (!processed)
1173                 {
1174                     wxRichTextRange range(newPos, newPos);
1175                     if (CanDeleteRange(* GetFocusObject(), range.FromInternal()))
1176                     {
1177                         GetFocusObject()->DeleteRangeWithUndo(range, this, & GetBuffer());
1178                         deletions ++;
1179                     }
1180                 }
1181             }
1182
1183             EndBatchUndo();
1184
1185             if (GetLastPosition() == -1)
1186             {
1187                 GetFocusObject()->Reset();
1188
1189                 m_caretPosition = -1;
1190                 PositionCaret();
1191                 SetDefaultStyleToCursorStyle();
1192             }
1193
1194             ScrollIntoView(m_caretPosition, WXK_LEFT);
1195
1196             // Always send this event; wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED will be sent only if there is an actual deletion.
1197             {
1198                 wxRichTextEvent cmdEvent(
1199                     wxEVT_COMMAND_RICHTEXT_DELETE,
1200                     GetId());
1201                 cmdEvent.SetEventObject(this);
1202                 cmdEvent.SetFlags(flags);
1203                 cmdEvent.SetPosition(m_caretPosition+1);
1204                 cmdEvent.SetContainer(GetFocusObject());
1205                 GetEventHandler()->ProcessEvent(cmdEvent);
1206             }
1207
1208             Update();
1209         }
1210         else
1211             event.Skip();
1212
1213         return;
1214     }
1215
1216     // all the other keys modify the controls contents which shouldn't be
1217     // possible if we're read-only
1218     if ( !IsEditable() )
1219     {
1220         event.Skip();
1221         return;
1222     }
1223
1224     if (event.GetKeyCode() == WXK_RETURN)
1225     {
1226         if (!CanInsertContent(* GetFocusObject(), m_caretPosition+1))
1227             return;
1228
1229         long newPos = m_caretPosition;
1230
1231         if (HasSelection() && !CanDeleteRange(* GetFocusObject(), GetSelectionRange()))
1232         {
1233             return;
1234         }
1235
1236         BeginBatchUndo(_("Insert Text"));
1237
1238         DeleteSelectedContent(& newPos);
1239
1240         if (event.ShiftDown())
1241         {
1242             wxString text;
1243             text = wxRichTextLineBreakChar;
1244             GetFocusObject()->InsertTextWithUndo(& GetBuffer(), newPos+1, text, this);
1245             m_caretAtLineStart = true;
1246             PositionCaret();
1247         }
1248         else
1249             GetFocusObject()->InsertNewlineWithUndo(& GetBuffer(), newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE|wxRICHTEXT_INSERT_INTERACTIVE);
1250
1251         EndBatchUndo();
1252         SetDefaultStyleToCursorStyle();
1253
1254         ScrollIntoView(m_caretPosition, WXK_RIGHT);
1255
1256         wxRichTextEvent cmdEvent(
1257             wxEVT_COMMAND_RICHTEXT_RETURN,
1258             GetId());
1259         cmdEvent.SetEventObject(this);
1260         cmdEvent.SetFlags(flags);
1261         cmdEvent.SetPosition(newPos+1);
1262         cmdEvent.SetContainer(GetFocusObject());
1263
1264         if (!GetEventHandler()->ProcessEvent(cmdEvent))
1265         {
1266             // Generate conventional event
1267             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
1268             InitCommandEvent(textEvent);
1269
1270             GetEventHandler()->ProcessEvent(textEvent);
1271         }
1272         Update();
1273     }
1274     else if (event.GetKeyCode() == WXK_BACK)
1275     {
1276         long newPos = m_caretPosition;
1277
1278         if (HasSelection() && !CanDeleteRange(* GetFocusObject(), GetSelectionRange()))
1279         {
1280             return;
1281         }
1282
1283         BeginBatchUndo(_("Delete Text"));
1284
1285         bool processed = DeleteSelectedContent(& newPos);
1286
1287         int deletions = 0;
1288         if (processed)
1289             deletions ++;
1290
1291         // Submit range in character positions, which are greater than caret positions,
1292         // so subtract 1 for deleted character and add 1 for conversion to character position.
1293         if (newPos > -1)
1294         {
1295             if (event.CmdDown())
1296             {
1297                 long pos = wxRichTextCtrl::FindNextWordPosition(-1);
1298                 if (pos < newPos)
1299                 {
1300                     wxRichTextRange range(pos+1, newPos);
1301                     if (CanDeleteRange(* GetFocusObject(), range.FromInternal()))
1302                     {
1303                         GetFocusObject()->DeleteRangeWithUndo(range, this, & GetBuffer());
1304                         deletions ++;
1305                     }
1306                     processed = true;
1307                 }
1308             }
1309
1310             if (!processed)
1311             {
1312                 wxRichTextRange range(newPos, newPos);
1313                 if (CanDeleteRange(* GetFocusObject(), range.FromInternal()))
1314                 {
1315                     GetFocusObject()->DeleteRangeWithUndo(range, this, & GetBuffer());
1316                     deletions ++;
1317                 }
1318             }
1319         }
1320
1321         EndBatchUndo();
1322
1323         if (GetLastPosition() == -1)
1324         {
1325             GetFocusObject()->Reset();
1326
1327             m_caretPosition = -1;
1328             PositionCaret();
1329             SetDefaultStyleToCursorStyle();
1330         }
1331
1332         ScrollIntoView(m_caretPosition, WXK_LEFT);
1333
1334         // Always send this event; wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED will be sent only if there is an actual deletion.
1335         {
1336             wxRichTextEvent cmdEvent(
1337                 wxEVT_COMMAND_RICHTEXT_DELETE,
1338                 GetId());
1339             cmdEvent.SetEventObject(this);
1340             cmdEvent.SetFlags(flags);
1341             cmdEvent.SetPosition(m_caretPosition+1);
1342             cmdEvent.SetContainer(GetFocusObject());
1343             GetEventHandler()->ProcessEvent(cmdEvent);
1344         }
1345
1346         Update();
1347     }
1348     else if (event.GetKeyCode() == WXK_DELETE)
1349     {
1350         long newPos = m_caretPosition;
1351
1352         if (HasSelection() && !CanDeleteRange(* GetFocusObject(), GetSelectionRange()))
1353         {
1354             return;
1355         }
1356
1357         BeginBatchUndo(_("Delete Text"));
1358
1359         bool processed = DeleteSelectedContent(& newPos);
1360
1361         int deletions = 0;
1362         if (processed)
1363             deletions ++;
1364
1365         // Submit range in character positions, which are greater than caret positions,
1366         if (newPos < GetFocusObject()->GetOwnRange().GetEnd()+1)
1367         {
1368             if (event.CmdDown())
1369             {
1370                 long pos = wxRichTextCtrl::FindNextWordPosition(1);
1371                 if (pos != -1 && (pos > newPos))
1372                 {
1373                     wxRichTextRange range(newPos+1, pos);
1374                     if (CanDeleteRange(* GetFocusObject(), range.FromInternal()))
1375                     {
1376                         GetFocusObject()->DeleteRangeWithUndo(range, this, & GetBuffer());
1377                         deletions ++;
1378                     }
1379                     processed = true;
1380                 }
1381             }
1382
1383             if (!processed && newPos < (GetLastPosition()-1))
1384             {
1385                 wxRichTextRange range(newPos+1, newPos+1);
1386                 if (CanDeleteRange(* GetFocusObject(), range.FromInternal()))
1387                 {
1388                     GetFocusObject()->DeleteRangeWithUndo(range, this, & GetBuffer());
1389                     deletions ++;
1390                 }
1391             }
1392         }
1393
1394         EndBatchUndo();
1395
1396         if (GetLastPosition() == -1)
1397         {
1398             GetFocusObject()->Reset();
1399
1400             m_caretPosition = -1;
1401             PositionCaret();
1402             SetDefaultStyleToCursorStyle();
1403         }
1404
1405         ScrollIntoView(m_caretPosition, WXK_LEFT);
1406
1407         // Always send this event; wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED will be sent only if there is an actual deletion.
1408         {
1409             wxRichTextEvent cmdEvent(
1410                 wxEVT_COMMAND_RICHTEXT_DELETE,
1411                 GetId());
1412             cmdEvent.SetEventObject(this);
1413             cmdEvent.SetFlags(flags);
1414             cmdEvent.SetPosition(m_caretPosition+1);
1415             cmdEvent.SetContainer(GetFocusObject());
1416             GetEventHandler()->ProcessEvent(cmdEvent);
1417         }
1418
1419         Update();
1420     }
1421     else
1422     {
1423         long keycode = event.GetKeyCode();
1424         switch ( keycode )
1425         {
1426             case WXK_ESCAPE:
1427             {
1428                 event.Skip();
1429                 return;
1430             }
1431
1432             default:
1433             {
1434 #ifdef __WXMAC__
1435                 if (event.CmdDown())
1436 #else
1437                 // Fixes AltGr+key with European input languages on Windows
1438                 if ((event.CmdDown() && !event.AltDown()) || (event.AltDown() && !event.CmdDown()))
1439 #endif
1440                 {
1441                     event.Skip();
1442                     return;
1443                 }
1444
1445                 wxRichTextEvent cmdEvent(
1446                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
1447                     GetId());
1448                 cmdEvent.SetEventObject(this);
1449                 cmdEvent.SetFlags(flags);
1450 #if wxUSE_UNICODE
1451                 cmdEvent.SetCharacter(event.GetUnicodeKey());
1452 #else
1453                 cmdEvent.SetCharacter((wxChar) keycode);
1454 #endif
1455                 cmdEvent.SetPosition(m_caretPosition+1);
1456                 cmdEvent.SetContainer(GetFocusObject());
1457
1458                 if (keycode == wxT('\t'))
1459                 {
1460                     // See if we need to promote or demote the selection or paragraph at the cursor
1461                     // position, instead of inserting a tab.
1462                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
1463                     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(pos);
1464                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
1465                     {
1466                         wxRichTextRange range;
1467                         if (HasSelection())
1468                             range = GetSelectionRange();
1469                         else
1470                             range = para->GetRange().FromInternal();
1471
1472                         int promoteBy = event.ShiftDown() ? 1 : -1;
1473
1474                         PromoteList(promoteBy, range, NULL);
1475
1476                         GetEventHandler()->ProcessEvent(cmdEvent);
1477
1478                         return;
1479                     }
1480                 }
1481
1482                 if (!CanInsertContent(* GetFocusObject(), m_caretPosition+1))
1483                     return;
1484
1485                 if (HasSelection() && !CanDeleteRange(* GetFocusObject(), GetSelectionRange()))
1486                     return;
1487
1488                 BeginBatchUndo(_("Insert Text"));
1489
1490                 long newPos = m_caretPosition;
1491                 DeleteSelectedContent(& newPos);
1492
1493 #if wxUSE_UNICODE
1494                 wxString str = event.GetUnicodeKey();
1495 #else
1496                 wxString str = (wxChar) event.GetKeyCode();
1497 #endif
1498                 GetFocusObject()->InsertTextWithUndo(& GetBuffer(), newPos+1, str, this, 0);
1499
1500                 EndBatchUndo();
1501
1502                 SetDefaultStyleToCursorStyle();
1503                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
1504
1505                 cmdEvent.SetPosition(m_caretPosition);
1506                 GetEventHandler()->ProcessEvent(cmdEvent);
1507
1508                 Update();
1509             }
1510         }
1511     }
1512 }
1513
1514 bool wxRichTextCtrl::ProcessMouseMovement(wxRichTextParagraphLayoutBox* container, wxRichTextObject* WXUNUSED(obj), long position, const wxPoint& WXUNUSED(pos))
1515 {
1516     wxRichTextAttr attr;
1517     if (container && GetStyle(position, attr, container))
1518     {
1519         if (attr.HasFlag(wxTEXT_ATTR_URL))
1520         {
1521             SetCursor(m_urlCursor);
1522         }
1523         else if (!attr.HasFlag(wxTEXT_ATTR_URL))
1524         {
1525             SetCursor(m_textCursor);
1526         }
1527         return true;
1528     }
1529     else
1530         return false;
1531 }
1532
1533 /// Delete content if there is a selection, e.g. when pressing a key.
1534 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
1535 {
1536     if (HasSelection())
1537     {
1538         long pos = m_selection.GetRange().GetStart();
1539         wxRichTextRange range = m_selection.GetRange();
1540
1541         // SelectAll causes more to be selected than doing it interactively,
1542         // and causes a new paragraph to be inserted. So for multiline buffers,
1543         // don't delete the final position.
1544         if (range.GetEnd() == GetLastPosition() && GetNumberOfLines() > 0)
1545             range.SetEnd(range.GetEnd()-1);
1546
1547         GetFocusObject()->DeleteRangeWithUndo(range, this, & GetBuffer());
1548         m_selection.Reset();
1549         m_selectionState = wxRichTextCtrlSelectionState_Normal;
1550
1551         if (newPos)
1552             *newPos = pos-1;
1553         return true;
1554     }
1555     else
1556         return false;
1557 }
1558
1559 /// Keyboard navigation
1560
1561 /*
1562
1563 Left:       left one character
1564 Right:      right one character
1565 Up:         up one line
1566 Down:       down one line
1567 Ctrl-Left:  left one word
1568 Ctrl-Right: right one word
1569 Ctrl-Up:    previous paragraph start
1570 Ctrl-Down:  next start of paragraph
1571 Home:       start of line
1572 End:        end of line
1573 Ctrl-Home:  start of document
1574 Ctrl-End:   end of document
1575 Page-Up:    Up a screen
1576 Page-Down:  Down a screen
1577
1578 Maybe:
1579
1580 Ctrl-Alt-PgUp: Start of window
1581 Ctrl-Alt-PgDn: End of window
1582 F8:         Start selection mode
1583 Esc:        End selection mode
1584
1585 Adding Shift does the above but starts/extends selection.
1586
1587
1588  */
1589
1590 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
1591 {
1592     bool success = false;
1593
1594     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
1595     {
1596         if (flags & wxRICHTEXT_CTRL_DOWN)
1597             success = WordRight(1, flags);
1598         else
1599             success = MoveRight(1, flags);
1600     }
1601     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
1602     {
1603         if (flags & wxRICHTEXT_CTRL_DOWN)
1604             success = WordLeft(1, flags);
1605         else
1606             success = MoveLeft(1, flags);
1607     }
1608     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
1609     {
1610         if (flags & wxRICHTEXT_CTRL_DOWN)
1611             success = MoveToParagraphStart(flags);
1612         else
1613             success = MoveUp(1, flags);
1614     }
1615     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
1616     {
1617         if (flags & wxRICHTEXT_CTRL_DOWN)
1618             success = MoveToParagraphEnd(flags);
1619         else
1620             success = MoveDown(1, flags);
1621     }
1622     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
1623     {
1624         success = PageUp(1, flags);
1625     }
1626     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1627     {
1628         success = PageDown(1, flags);
1629     }
1630     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
1631     {
1632         if (flags & wxRICHTEXT_CTRL_DOWN)
1633             success = MoveHome(flags);
1634         else
1635             success = MoveToLineStart(flags);
1636     }
1637     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
1638     {
1639         if (flags & wxRICHTEXT_CTRL_DOWN)
1640             success = MoveEnd(flags);
1641         else
1642             success = MoveToLineEnd(flags);
1643     }
1644
1645     if (success)
1646     {
1647         ScrollIntoView(m_caretPosition, keyCode);
1648         SetDefaultStyleToCursorStyle();
1649     }
1650
1651     return success;
1652 }
1653
1654 /// Extend the selection. Selections are in caret positions.
1655 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
1656 {
1657     if (flags & wxRICHTEXT_SHIFT_DOWN)
1658     {
1659         if (oldPos == newPos)
1660             return false;
1661
1662         wxRichTextSelection oldSelection = m_selection;
1663
1664         m_selection.SetContainer(GetFocusObject());
1665
1666         wxRichTextRange oldRange;
1667         if (m_selection.IsValid())
1668             oldRange = m_selection.GetRange();
1669         else
1670             oldRange = wxRICHTEXT_NO_SELECTION;
1671         wxRichTextRange newRange;
1672
1673         // If not currently selecting, start selecting
1674         if (oldRange.GetStart() == -2)
1675         {
1676             m_selectionAnchor = oldPos;
1677
1678             if (oldPos > newPos)
1679                 newRange.SetRange(newPos+1, oldPos);
1680             else
1681                 newRange.SetRange(oldPos+1, newPos);
1682         }
1683         else
1684         {
1685             // Always ensure that the selection range start is greater than
1686             // the end.
1687             if (newPos > m_selectionAnchor)
1688                 newRange.SetRange(m_selectionAnchor+1, newPos);
1689             else if (newPos == m_selectionAnchor)
1690                 newRange = wxRichTextRange(-2, -2);
1691             else
1692                 newRange.SetRange(newPos+1, m_selectionAnchor);
1693         }
1694
1695         m_selection.SetRange(newRange);
1696
1697         RefreshForSelectionChange(oldSelection, m_selection);
1698
1699         if (newRange.GetStart() > newRange.GetEnd())
1700         {
1701             wxLogDebug(wxT("Strange selection range"));
1702         }
1703
1704         return true;
1705     }
1706     else
1707         return false;
1708 }
1709
1710 /// Scroll into view, returning true if we scrolled.
1711 /// This takes a _caret_ position.
1712 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1713 {
1714     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1715
1716     if (!line)
1717         return false;
1718
1719     int ppuX, ppuY;
1720     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1721
1722     int startXUnits, startYUnits;
1723     GetViewStart(& startXUnits, & startYUnits);
1724     int startY = startYUnits * ppuY;
1725
1726     int sx = 0, sy = 0;
1727     GetVirtualSize(& sx, & sy);
1728     int sxUnits = 0;
1729     int syUnits = 0;
1730     if (ppuY != 0)
1731         syUnits = sy/ppuY;
1732
1733     wxRect rect = GetScaledRect(line->GetRect());
1734
1735     bool scrolled = false;
1736
1737     wxSize clientSize = GetClientSize();
1738
1739     int leftMargin, rightMargin, topMargin, bottomMargin;
1740
1741     {
1742         wxClientDC dc(this);
1743         wxRichTextObject::GetTotalMargin(dc, & GetBuffer(), GetBuffer().GetAttributes(), leftMargin, rightMargin,
1744             topMargin, bottomMargin);
1745     }
1746     clientSize.y -= (int) (0.5 + bottomMargin * GetScale());
1747
1748     if (GetWindowStyle() & wxRE_CENTRE_CARET)
1749     {
1750         int y = rect.y - GetClientSize().y/2;
1751         int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1752         if (y >= 0 && (y + clientSize.y) < (int) (0.5 + GetBuffer().GetCachedSize().y * GetScale()))
1753         {
1754             if (startYUnits != yUnits)
1755             {
1756                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1757                 scrolled = true;
1758             }
1759 #if !wxRICHTEXT_USE_OWN_CARET
1760             if (scrolled)
1761 #endif
1762                 PositionCaret();
1763
1764             return scrolled;
1765         }
1766     }
1767
1768     // Going down
1769     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1770         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1771         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1772         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1773     {
1774         if ((rect.y + rect.height) > (clientSize.y + startY))
1775         {
1776             // Make it scroll so this item is at the bottom
1777             // of the window
1778             int y = rect.y - (clientSize.y - rect.height);
1779             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1780
1781             // If we're still off the screen, scroll another line down
1782             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1783                 yUnits ++;
1784
1785             if (startYUnits != yUnits)
1786             {
1787                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1788                 scrolled = true;
1789             }
1790         }
1791         else if (rect.y < (startY + (int) (0.5 + GetBuffer().GetTopMargin() * 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     }
1805     // Going up
1806     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1807              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1808              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1809              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1810     {
1811         if (rect.y < (startY + (int) (0.5 + GetBuffer().GetBottomMargin() * GetScale())))
1812         {
1813             // Make it scroll so this item is at the top
1814             // of the window
1815             int y = rect.y - (int) (0.5 + GetBuffer().GetTopMargin() * GetScale());
1816             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1817
1818             if (startYUnits != yUnits)
1819             {
1820                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1821                 scrolled = true;
1822             }
1823         }
1824         else if ((rect.y + rect.height) > (clientSize.y + startY))
1825         {
1826             // Make it scroll so this item is at the bottom
1827             // of the window
1828             int y = rect.y - (clientSize.y - rect.height);
1829             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1830
1831             // If we're still off the screen, scroll another line down
1832             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1833                 yUnits ++;
1834
1835             if (startYUnits != yUnits)
1836             {
1837                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1838                 scrolled = true;
1839             }
1840         }
1841     }
1842
1843 #if !wxRICHTEXT_USE_OWN_CARET
1844     if (scrolled)
1845 #endif
1846         PositionCaret();
1847
1848     return scrolled;
1849 }
1850
1851 /// Is the given position visible on the screen?
1852 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1853 {
1854     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1855
1856     if (!line)
1857         return false;
1858
1859     int ppuX, ppuY;
1860     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1861
1862     int startX, startY;
1863     GetViewStart(& startX, & startY);
1864     startX = 0;
1865     startY = startY * ppuY;
1866
1867     wxRect rect = GetScaledRect(line->GetRect());
1868     wxSize clientSize = GetClientSize();
1869     clientSize.y -= (int) (0.5 + GetBuffer().GetBottomMargin() * GetScale());
1870
1871     return (rect.GetTop() >= (startY + (int) (0.5 + GetBuffer().GetTopMargin() * GetScale()))) &&
1872            (rect.GetBottom() <= (startY + clientSize.y));
1873 }
1874
1875 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1876 {
1877     m_caretPosition = position;
1878     m_caretAtLineStart = showAtLineStart;
1879 }
1880
1881 /// Move caret one visual step forward: this may mean setting a flag
1882 /// and keeping the same position if we're going from the end of one line
1883 /// to the start of the next, which may be the exact same caret position.
1884 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1885 {
1886     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(oldPosition);
1887
1888     // Only do the check if we're not at the end of the paragraph (where things work OK
1889     // anyway)
1890     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1891     {
1892         wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(oldPosition);
1893
1894         if (line)
1895         {
1896             wxRichTextRange lineRange = line->GetAbsoluteRange();
1897
1898             // We're at the end of a line. See whether we need to
1899             // stay at the same actual caret position but change visual
1900             // position, or not.
1901             if (oldPosition == lineRange.GetEnd())
1902             {
1903                 if (m_caretAtLineStart)
1904                 {
1905                     // We're already at the start of the line, so actually move on now.
1906                     m_caretPosition = oldPosition + 1;
1907                     m_caretAtLineStart = false;
1908                 }
1909                 else
1910                 {
1911                     // We're showing at the end of the line, so keep to
1912                     // the same position but indicate that we're to show
1913                     // at the start of the next line.
1914                     m_caretPosition = oldPosition;
1915                     m_caretAtLineStart = true;
1916                 }
1917                 SetDefaultStyleToCursorStyle();
1918                 return;
1919             }
1920         }
1921     }
1922     m_caretPosition ++;
1923     SetDefaultStyleToCursorStyle();
1924 }
1925
1926 /// Move caret one visual step backward: this may mean setting a flag
1927 /// and keeping the same position if we're going from the end of one line
1928 /// to the start of the next, which may be the exact same caret position.
1929 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1930 {
1931     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(oldPosition);
1932
1933     // Only do the check if we're not at the start of the paragraph (where things work OK
1934     // anyway)
1935     if (para && (oldPosition != para->GetRange().GetStart()))
1936     {
1937         wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(oldPosition);
1938
1939         if (line)
1940         {
1941             wxRichTextRange lineRange = line->GetAbsoluteRange();
1942
1943             // We're at the start of a line. See whether we need to
1944             // stay at the same actual caret position but change visual
1945             // position, or not.
1946             if (oldPosition == lineRange.GetStart())
1947             {
1948                 m_caretPosition = oldPosition-1;
1949                 m_caretAtLineStart = true;
1950                 return;
1951             }
1952             else if (oldPosition == lineRange.GetEnd())
1953             {
1954                 if (m_caretAtLineStart)
1955                 {
1956                     // We're at the start of the line, so keep the same caret position
1957                     // but clear the start-of-line flag.
1958                     m_caretPosition = oldPosition;
1959                     m_caretAtLineStart = false;
1960                 }
1961                 else
1962                 {
1963                     // We're showing at the end of the line, so go back
1964                     // to the previous character position.
1965                     m_caretPosition = oldPosition - 1;
1966                 }
1967                 SetDefaultStyleToCursorStyle();
1968                 return;
1969             }
1970         }
1971     }
1972     m_caretPosition --;
1973     SetDefaultStyleToCursorStyle();
1974 }
1975
1976 /// Move right
1977 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1978 {
1979     long endPos = GetFocusObject()->GetOwnRange().GetEnd();
1980
1981     if (m_caretPosition + noPositions < endPos)
1982     {
1983         long oldPos = m_caretPosition;
1984         long newPos = m_caretPosition + noPositions;
1985
1986         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1987         if (!extendSel)
1988             SelectNone();
1989
1990         // Determine by looking at oldPos and m_caretPosition whether
1991         // we moved from the end of a line to the start of the next line, in which case
1992         // we want to adjust the caret position such that it is positioned at the
1993         // start of the next line, rather than jumping past the first character of the
1994         // line.
1995         if (noPositions == 1 && !extendSel)
1996             MoveCaretForward(oldPos);
1997         else
1998             SetCaretPosition(newPos);
1999
2000         PositionCaret();
2001         SetDefaultStyleToCursorStyle();
2002
2003         return true;
2004     }
2005     else
2006         return false;
2007 }
2008
2009 /// Move left
2010 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
2011 {
2012     long startPos = -1;
2013
2014     if (m_caretPosition > startPos - noPositions + 1)
2015     {
2016         long oldPos = m_caretPosition;
2017         long newPos = m_caretPosition - noPositions;
2018         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
2019         if (!extendSel)
2020             SelectNone();
2021
2022         if (noPositions == 1 && !extendSel)
2023             MoveCaretBack(oldPos);
2024         else
2025             SetCaretPosition(newPos);
2026
2027         PositionCaret();
2028         SetDefaultStyleToCursorStyle();
2029
2030         return true;
2031     }
2032     else
2033         return false;
2034 }
2035
2036 // Find the caret position for the combination of hit-test flags and character position.
2037 // Returns the caret position and also an indication of where to place the caret (caretLineStart)
2038 // since this is ambiguous (same position used for end of line and start of next).
2039 long wxRichTextCtrl::FindCaretPositionForCharacterPosition(long position, int hitTestFlags, wxRichTextParagraphLayoutBox* container,
2040                                                    bool& caretLineStart)
2041 {
2042     // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
2043     // we want to be at the end of the last line but with m_caretAtLineStart set to true,
2044     // so we view the caret at the start of the line.
2045     caretLineStart = false;
2046     long caretPosition = position;
2047
2048     if (hitTestFlags & wxRICHTEXT_HITTEST_BEFORE)
2049     {
2050         wxRichTextLine* thisLine = container->GetLineAtPosition(position-1);
2051         wxRichTextRange lineRange;
2052         if (thisLine)
2053             lineRange = thisLine->GetAbsoluteRange();
2054
2055         if (thisLine && (position-1) == lineRange.GetEnd())
2056         {
2057             caretPosition --;
2058             caretLineStart = true;
2059         }
2060         else
2061         {
2062             wxRichTextParagraph* para = container->GetParagraphAtPosition(position);
2063             if (para && para->GetRange().GetStart() == position)
2064                 caretPosition --;
2065         }
2066     }
2067     return caretPosition;
2068 }
2069
2070 /// Move up
2071 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
2072 {
2073     return MoveDown(- noLines, flags);
2074 }
2075
2076 /// Move up
2077 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
2078 {
2079     if (!GetCaret())
2080         return false;
2081
2082     long lineNumber = GetFocusObject()->GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
2083     wxPoint pt = GetCaret()->GetPosition();
2084     long newLine = lineNumber + noLines;
2085     bool notInThisObject = false;
2086
2087     if (lineNumber != -1)
2088     {
2089         if (noLines > 0)
2090         {
2091             long lastLine = GetFocusObject()->GetVisibleLineNumber(GetFocusObject()->GetOwnRange().GetEnd());
2092             if (newLine > lastLine)
2093                 notInThisObject = true;
2094         }
2095         else
2096         {
2097             if (newLine < 0)
2098                 notInThisObject = true;
2099         }
2100     }
2101
2102     wxRichTextParagraphLayoutBox* container = GetFocusObject();
2103     int hitTestFlags = wxRICHTEXT_HITTEST_NO_NESTED_OBJECTS|wxRICHTEXT_HITTEST_NO_FLOATING_OBJECTS|wxRICHTEXT_HITTEST_HONOUR_ATOMIC;
2104
2105     if (notInThisObject)
2106     {
2107         // If we know we're navigating out of the current object,
2108         // try to find an object anywhere in the buffer at the new position (up or down a bit)
2109         container = & GetBuffer();
2110         hitTestFlags &= ~wxRICHTEXT_HITTEST_NO_NESTED_OBJECTS;
2111
2112         if (noLines > 0) // going down
2113         {
2114             pt.y = GetFocusObject()->GetPosition().y + GetFocusObject()->GetCachedSize().y + 2;
2115         }
2116         else // going up
2117         {
2118             pt.y = GetFocusObject()->GetPosition().y - 2;
2119         }
2120     }
2121     else
2122     {
2123         wxRichTextLine* lineObj = GetFocusObject()->GetLineForVisibleLineNumber(newLine);
2124         if (lineObj)
2125             pt.y = lineObj->GetAbsolutePosition().y + 2;
2126         else
2127             return false;
2128     }
2129
2130     long newPos = 0;
2131     wxClientDC dc(this);
2132     PrepareDC(dc);
2133     dc.SetFont(GetFont());
2134
2135     wxRichTextObject* hitObj = NULL;
2136     wxRichTextObject* contextObj = NULL;
2137     wxRichTextDrawingContext context(& GetBuffer());
2138     int hitTest = container->HitTest(dc, context, pt, newPos, & hitObj, & contextObj, hitTestFlags);
2139
2140     if (hitObj &&
2141         ((hitTest & wxRICHTEXT_HITTEST_NONE) == 0) &&
2142         (! (hitObj == (& m_buffer) && ((hitTest & wxRICHTEXT_HITTEST_OUTSIDE) != 0))) // outside the buffer counts as 'do nothing'
2143         )
2144     {
2145         if (notInThisObject)
2146         {
2147             wxRichTextParagraphLayoutBox* actualContainer = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
2148             if (actualContainer && actualContainer != GetFocusObject() && actualContainer->AcceptsFocus())
2149             {
2150                 SetFocusObject(actualContainer, false /* don't set caret position yet */);
2151
2152                 container = actualContainer;
2153             }
2154         }
2155
2156         bool caretLineStart = true;
2157         long caretPosition = FindCaretPositionForCharacterPosition(newPos, hitTest, container, caretLineStart);
2158         long newSelEnd = caretPosition;
2159         bool extendSel;
2160
2161         if (notInThisObject)
2162             extendSel = false;
2163         else
2164             extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
2165
2166         if (!extendSel)
2167             SelectNone();
2168
2169         SetCaretPosition(caretPosition, caretLineStart);
2170         PositionCaret();
2171         SetDefaultStyleToCursorStyle();
2172
2173         return true;
2174     }
2175
2176     return false;
2177 }
2178
2179 /// Move to the end of the paragraph
2180 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
2181 {
2182     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(m_caretPosition, true);
2183     if (para)
2184     {
2185         long newPos = para->GetRange().GetEnd() - 1;
2186         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
2187         if (!extendSel)
2188             SelectNone();
2189
2190         SetCaretPosition(newPos);
2191         PositionCaret();
2192         SetDefaultStyleToCursorStyle();
2193
2194         return true;
2195     }
2196
2197     return false;
2198 }
2199
2200 /// Move to the start of the paragraph
2201 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
2202 {
2203     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(m_caretPosition, true);
2204     if (para)
2205     {
2206         long newPos = para->GetRange().GetStart() - 1;
2207         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
2208         if (!extendSel)
2209             SelectNone();
2210
2211         SetCaretPosition(newPos);
2212         PositionCaret();
2213         SetDefaultStyleToCursorStyle();
2214
2215         return true;
2216     }
2217
2218     return false;
2219 }
2220
2221 /// Move to the end of the line
2222 bool wxRichTextCtrl::MoveToLineEnd(int flags)
2223 {
2224     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
2225
2226     if (line)
2227     {
2228         wxRichTextRange lineRange = line->GetAbsoluteRange();
2229         long newPos = lineRange.GetEnd();
2230         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
2231         if (!extendSel)
2232             SelectNone();
2233
2234         SetCaretPosition(newPos);
2235         PositionCaret();
2236         SetDefaultStyleToCursorStyle();
2237
2238         return true;
2239     }
2240
2241     return false;
2242 }
2243
2244 /// Move to the start of the line
2245 bool wxRichTextCtrl::MoveToLineStart(int flags)
2246 {
2247     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
2248     if (line)
2249     {
2250         wxRichTextRange lineRange = line->GetAbsoluteRange();
2251         long newPos = lineRange.GetStart()-1;
2252
2253         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
2254         if (!extendSel)
2255             SelectNone();
2256
2257         wxRichTextParagraph* para = GetFocusObject()->GetParagraphForLine(line);
2258
2259         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
2260         PositionCaret();
2261         SetDefaultStyleToCursorStyle();
2262
2263         return true;
2264     }
2265
2266     return false;
2267 }
2268
2269 /// Move to the start of the buffer
2270 bool wxRichTextCtrl::MoveHome(int flags)
2271 {
2272     if (m_caretPosition != -1)
2273     {
2274         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
2275         if (!extendSel)
2276             SelectNone();
2277
2278         SetCaretPosition(-1);
2279         PositionCaret();
2280         SetDefaultStyleToCursorStyle();
2281
2282         return true;
2283     }
2284     else
2285         return false;
2286 }
2287
2288 /// Move to the end of the buffer
2289 bool wxRichTextCtrl::MoveEnd(int flags)
2290 {
2291     long endPos = GetFocusObject()->GetOwnRange().GetEnd()-1;
2292
2293     if (m_caretPosition != endPos)
2294     {
2295         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
2296         if (!extendSel)
2297             SelectNone();
2298
2299         SetCaretPosition(endPos);
2300         PositionCaret();
2301         SetDefaultStyleToCursorStyle();
2302
2303         return true;
2304     }
2305     else
2306         return false;
2307 }
2308
2309 /// Move noPages pages up
2310 bool wxRichTextCtrl::PageUp(int noPages, int flags)
2311 {
2312     return PageDown(- noPages, flags);
2313 }
2314
2315 /// Move noPages pages down
2316 bool wxRichTextCtrl::PageDown(int noPages, int flags)
2317 {
2318     // Calculate which line occurs noPages * screen height further down.
2319     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
2320     if (line)
2321     {
2322         wxSize clientSize = GetClientSize();
2323         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
2324
2325         wxRichTextLine* newLine = GetFocusObject()->GetLineAtYPosition(newY);
2326         if (newLine)
2327         {
2328             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
2329             long pos = lineRange.GetStart()-1;
2330             if (pos != m_caretPosition)
2331             {
2332                 wxRichTextParagraph* para = GetFocusObject()->GetParagraphForLine(newLine);
2333
2334                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
2335                 if (!extendSel)
2336                     SelectNone();
2337
2338                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
2339                 PositionCaret();
2340                 SetDefaultStyleToCursorStyle();
2341
2342                 return true;
2343             }
2344         }
2345     }
2346
2347     return false;
2348 }
2349
2350 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
2351 {
2352     return str == wxT(" ") || str == wxT("\t") || (!str.empty() && (str[0] == (wxChar) 160));
2353 }
2354
2355 // Finds the caret position for the next word
2356 long wxRichTextCtrl::FindNextWordPosition(int direction) const
2357 {
2358     long endPos = GetFocusObject()->GetOwnRange().GetEnd();
2359
2360     if (direction > 0)
2361     {
2362         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
2363
2364         // First skip current text to space
2365         while (i < endPos && i > -1)
2366         {
2367             // i is in character, not caret positions
2368             wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(i, i));
2369             wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(i, false);
2370             if (line && (i == line->GetAbsoluteRange().GetEnd()))
2371             {
2372                 break;
2373             }
2374             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
2375                 i += direction;
2376             else
2377             {
2378                 break;
2379             }
2380         }
2381         while (i < endPos && i > -1)
2382         {
2383             // i is in character, not caret positions
2384             wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(i, i));
2385             wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(i, false);
2386             if (line && (i == line->GetAbsoluteRange().GetEnd()))
2387                 return wxMax(-1, i);
2388
2389             if (text.empty()) // End of paragraph, or maybe an image
2390                 return wxMax(-1, i - 1);
2391             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
2392                 i += direction;
2393             else
2394             {
2395                 // Convert to caret position
2396                 return wxMax(-1, i - 1);
2397             }
2398         }
2399         if (i >= endPos)
2400             return endPos-1;
2401         return i-1;
2402     }
2403     else
2404     {
2405         long i = m_caretPosition;
2406
2407         // First skip white space
2408         while (i < endPos && i > -1)
2409         {
2410             // i is in character, not caret positions
2411             wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(i, i));
2412             wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(i, false);
2413
2414             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
2415                 break;
2416             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
2417                 i += direction;
2418             else
2419                 break;
2420         }
2421         // Next skip current text to space
2422         while (i < endPos && i > -1)
2423         {
2424             // i is in character, not caret positions
2425             wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(i, i));
2426             wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(i, false);
2427             if (line && line->GetAbsoluteRange().GetStart() == i)
2428                 return i-1;
2429
2430             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
2431                 i += direction;
2432             else
2433             {
2434                 return i;
2435             }
2436         }
2437         if (i < -1)
2438             return -1;
2439         return i;
2440     }
2441 }
2442
2443 /// Move n words left
2444 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
2445 {
2446     long pos = FindNextWordPosition(-1);
2447     if (pos != m_caretPosition)
2448     {
2449         wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(pos, true);
2450
2451         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
2452         if (!extendSel)
2453             SelectNone();
2454
2455         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
2456         PositionCaret();
2457         SetDefaultStyleToCursorStyle();
2458
2459         return true;
2460     }
2461
2462     return false;
2463 }
2464
2465 /// Move n words right
2466 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
2467 {
2468     long pos = FindNextWordPosition(1);
2469     if (pos != m_caretPosition)
2470     {
2471         wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(pos, true);
2472
2473         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
2474         if (!extendSel)
2475             SelectNone();
2476
2477         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
2478         PositionCaret();
2479         SetDefaultStyleToCursorStyle();
2480
2481         return true;
2482     }
2483
2484     return false;
2485 }
2486
2487 /// Sizing
2488 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
2489 {
2490     // Only do sizing optimization for large buffers
2491     if (GetBuffer().GetOwnRange().GetEnd() > m_delayedLayoutThreshold)
2492     {
2493         m_fullLayoutRequired = true;
2494         m_fullLayoutTime = wxGetLocalTimeMillis();
2495         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
2496         LayoutContent(true /* onlyVisibleRect */);
2497     }
2498     else
2499         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2500
2501 #if wxRICHTEXT_BUFFERED_PAINTING
2502     RecreateBuffer();
2503 #endif
2504
2505     event.Skip();
2506 }
2507
2508 // Force any pending layout due to large buffer
2509 void wxRichTextCtrl::ForceDelayedLayout()
2510 {
2511     if (m_fullLayoutRequired)
2512     {
2513         m_fullLayoutRequired = false;
2514         m_fullLayoutTime = 0;
2515         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2516         ShowPosition(m_fullLayoutSavedPosition);
2517         Refresh(false);
2518         Update();
2519     }
2520 }
2521
2522 /// Idle-time processing
2523 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
2524 {
2525 #if wxRICHTEXT_USE_OWN_CARET
2526     if (((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
2527     {
2528         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate(false);
2529         PositionCaret();
2530         GetCaret()->Show();
2531     }
2532 #endif
2533
2534     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
2535
2536     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
2537     {
2538         m_fullLayoutRequired = false;
2539         m_fullLayoutTime = 0;
2540         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2541         ShowPosition(m_fullLayoutSavedPosition);
2542         Refresh(false);
2543     }
2544
2545     if (m_caretPositionForDefaultStyle != -2)
2546     {
2547         // If the caret position has changed, no longer reflect the default style
2548         // in the UI.
2549         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
2550             m_caretPositionForDefaultStyle = -2;
2551     }
2552
2553     event.Skip();
2554 }
2555
2556 /// Scrolling
2557 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
2558 {
2559 #if wxRICHTEXT_USE_OWN_CARET
2560     if (!((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
2561     {
2562         GetCaret()->Hide();
2563         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate();
2564     }
2565 #endif
2566
2567     event.Skip();
2568 }
2569
2570 /// Set up scrollbars, e.g. after a resize
2571 void wxRichTextCtrl::SetupScrollbars(bool atTop)
2572 {
2573     if (IsFrozen())
2574         return;
2575
2576     if (GetBuffer().IsEmpty() || !m_verticalScrollbarEnabled)
2577     {
2578         SetScrollbars(0, 0, 0, 0, 0, 0);
2579         return;
2580     }
2581
2582     // TODO: reimplement scrolling so we scroll by line, not by fixed number
2583     // of pixels. See e.g. wxVScrolledWindow for ideas.
2584     int pixelsPerUnit = 5;
2585     wxSize clientSize = GetClientSize();
2586
2587     int maxHeight = (int) (0.5 + GetScale() * (GetBuffer().GetCachedSize().y + GetBuffer().GetTopMargin()));
2588
2589     // Round up so we have at least maxHeight pixels
2590     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
2591
2592     int startX = 0, startY = 0;
2593     if (!atTop)
2594         GetViewStart(& startX, & startY);
2595
2596     int maxPositionX = 0;
2597     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
2598
2599     int newStartX = wxMin(maxPositionX, startX);
2600     int newStartY = wxMin(maxPositionY, startY);
2601
2602     int oldPPUX, oldPPUY;
2603     int oldStartX, oldStartY;
2604     int oldVirtualSizeX = 0, oldVirtualSizeY = 0;
2605     GetScrollPixelsPerUnit(& oldPPUX, & oldPPUY);
2606     GetViewStart(& oldStartX, & oldStartY);
2607     GetVirtualSize(& oldVirtualSizeX, & oldVirtualSizeY);
2608     if (oldPPUY > 0)
2609         oldVirtualSizeY /= oldPPUY;
2610
2611     if (oldPPUX == 0 && oldPPUY == pixelsPerUnit && oldVirtualSizeY == unitsY && oldStartX == newStartX && oldStartY == newStartY)
2612         return;
2613
2614     // Don't set scrollbars if there were none before, and there will be none now.
2615     if (oldPPUY != 0 && (oldVirtualSizeY*oldPPUY < clientSize.y) && (unitsY*pixelsPerUnit < clientSize.y))
2616         return;
2617
2618     // Move to previous scroll position if
2619     // possible
2620     SetScrollbars(0, pixelsPerUnit, 0, unitsY, newStartX, newStartY);
2621 }
2622
2623 /// Paint the background
2624 void wxRichTextCtrl::PaintBackground(wxDC& dc)
2625 {
2626     wxColour backgroundColour = GetBackgroundColour();
2627     if (!backgroundColour.IsOk())
2628         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
2629
2630     // Clear the background
2631     dc.SetBrush(wxBrush(backgroundColour));
2632     dc.SetPen(*wxTRANSPARENT_PEN);
2633     wxRect windowRect(GetClientSize());
2634     windowRect.x -= 2; windowRect.y -= 2;
2635     windowRect.width += 4; windowRect.height += 4;
2636
2637     // We need to shift the rectangle to take into account
2638     // scrolling. Converting device to logical coordinates.
2639     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
2640     dc.DrawRectangle(windowRect);
2641 }
2642
2643 #if wxRICHTEXT_BUFFERED_PAINTING
2644 /// Recreate buffer bitmap if necessary
2645 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
2646 {
2647     wxSize sz = size;
2648     if (sz == wxDefaultSize)
2649         sz = GetClientSize();
2650
2651     if (sz.x < 1 || sz.y < 1)
2652         return false;
2653
2654     if (!m_bufferBitmap.IsOk() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
2655         m_bufferBitmap = wxBitmap(sz.x, sz.y);
2656     return m_bufferBitmap.IsOk();
2657 }
2658 #endif
2659
2660 // ----------------------------------------------------------------------------
2661 // file IO functions
2662 // ----------------------------------------------------------------------------
2663
2664 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
2665 {
2666     SetFocusObject(& GetBuffer(), true);
2667
2668     bool success = GetBuffer().LoadFile(filename, (wxRichTextFileType)fileType);
2669     if (success)
2670         m_filename = filename;
2671
2672     DiscardEdits();
2673     SetInsertionPoint(0);
2674     LayoutContent();
2675     PositionCaret();
2676     SetupScrollbars(true);
2677     Refresh(false);
2678     wxTextCtrl::SendTextUpdatedEvent(this);
2679
2680     if (success)
2681         return true;
2682     else
2683     {
2684         wxLogError(_("File couldn't be loaded."));
2685
2686         return false;
2687     }
2688 }
2689
2690 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
2691 {
2692     if (GetBuffer().SaveFile(filename, (wxRichTextFileType)fileType))
2693     {
2694         m_filename = filename;
2695
2696         DiscardEdits();
2697
2698         return true;
2699     }
2700
2701     wxLogError(_("The text couldn't be saved."));
2702
2703     return false;
2704 }
2705
2706 // ----------------------------------------------------------------------------
2707 // wxRichTextCtrl specific functionality
2708 // ----------------------------------------------------------------------------
2709
2710 /// Add a new paragraph of text to the end of the buffer
2711 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
2712 {
2713     wxRichTextRange range = GetFocusObject()->AddParagraph(text);
2714     GetBuffer().Invalidate();
2715     LayoutContent();
2716     return range;
2717 }
2718
2719 /// Add an image
2720 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
2721 {
2722     wxRichTextRange range = GetFocusObject()->AddImage(image);
2723     GetBuffer().Invalidate();
2724     LayoutContent();
2725     return range;
2726 }
2727
2728 // ----------------------------------------------------------------------------
2729 // selection and ranges
2730 // ----------------------------------------------------------------------------
2731
2732 void wxRichTextCtrl::SelectAll()
2733 {
2734     SetSelection(-1, -1);
2735 }
2736
2737 /// Select none
2738 void wxRichTextCtrl::SelectNone()
2739 {
2740     if (m_selection.IsValid())
2741     {
2742         wxRichTextSelection oldSelection = m_selection;
2743
2744         m_selection.Reset();
2745
2746         RefreshForSelectionChange(oldSelection, m_selection);
2747     }
2748     m_selectionAnchor = -2;
2749     m_selectionAnchorObject = NULL;
2750     m_selectionState = wxRichTextCtrlSelectionState_Normal;
2751 }
2752
2753 static bool wxIsWordDelimiter(const wxString& text)
2754 {
2755     return !text.IsEmpty() && !wxIsalnum(text[0]);
2756 }
2757
2758 /// Select the word at the given character position
2759 bool wxRichTextCtrl::SelectWord(long position)
2760 {
2761     if (position < 0 || position > GetFocusObject()->GetOwnRange().GetEnd())
2762         return false;
2763
2764     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(position);
2765     if (!para)
2766         return false;
2767
2768     if (position == para->GetRange().GetEnd())
2769         position --;
2770
2771     long positionStart = position;
2772     long positionEnd = position;
2773
2774     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
2775     {
2776         wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(positionStart, positionStart));
2777         if (wxIsWordDelimiter(text))
2778         {
2779             positionStart ++;
2780             break;
2781         }
2782     }
2783     if (positionStart < para->GetRange().GetStart())
2784         positionStart = para->GetRange().GetStart();
2785
2786     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
2787     {
2788         wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
2789         if (wxIsWordDelimiter(text))
2790         {
2791             positionEnd --;
2792             break;
2793         }
2794     }
2795     if (positionEnd >= para->GetRange().GetEnd())
2796         positionEnd = para->GetRange().GetEnd();
2797
2798     if (positionEnd < positionStart)
2799         return false;
2800
2801     SetSelection(positionStart, positionEnd+1);
2802
2803     if (positionStart >= 0)
2804     {
2805         MoveCaret(positionStart-1, true);
2806         SetDefaultStyleToCursorStyle();
2807     }
2808
2809     return true;
2810 }
2811
2812 wxString wxRichTextCtrl::GetStringSelection() const
2813 {
2814     long from, to;
2815     GetSelection(&from, &to);
2816
2817     return GetRange(from, to);
2818 }
2819
2820 // ----------------------------------------------------------------------------
2821 // hit testing
2822 // ----------------------------------------------------------------------------
2823
2824 wxTextCtrlHitTestResult
2825 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2826 {
2827     // implement in terms of the other overload as the native ports typically
2828     // can get the position and not (x, y) pair directly (although wxUniv
2829     // directly gets x and y -- and so overrides this method as well)
2830     long pos;
2831     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2832
2833     if ( rc != wxTE_HT_UNKNOWN )
2834     {
2835         PositionToXY(pos, x, y);
2836     }
2837
2838     return rc;
2839 }
2840
2841 wxTextCtrlHitTestResult
2842 wxRichTextCtrl::HitTest(const wxPoint& pt,
2843                         long * pos) const
2844 {
2845     wxClientDC dc((wxRichTextCtrl*) this);
2846     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2847
2848     // Buffer uses logical position (relative to start of buffer)
2849     // so convert
2850     wxPoint pt2 = GetLogicalPoint(pt);
2851
2852     wxRichTextObject* hitObj = NULL;
2853     wxRichTextObject* contextObj = NULL;
2854     wxRichTextDrawingContext context((wxRichTextBuffer*) & GetBuffer());
2855     int hit = ((wxRichTextCtrl*)this)->GetFocusObject()->HitTest(dc, context, pt2, *pos, & hitObj, & contextObj, wxRICHTEXT_HITTEST_NO_NESTED_OBJECTS);
2856
2857     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2858         return wxTE_HT_BEFORE;
2859     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2860         return wxTE_HT_BEYOND;
2861     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2862         return wxTE_HT_ON_TEXT;
2863
2864     return wxTE_HT_UNKNOWN;
2865 }
2866
2867 wxRichTextParagraphLayoutBox*
2868 wxRichTextCtrl::FindContainerAtPoint(const wxPoint pt, long& position, int& hit, wxRichTextObject* hitObj, int flags/* = 0*/)
2869 {
2870     wxClientDC dc(this);
2871     PrepareDC(dc);
2872     dc.SetFont(GetFont());
2873
2874     wxPoint logicalPt = GetLogicalPoint(pt);
2875
2876     wxRichTextObject* contextObj = NULL;
2877     wxRichTextDrawingContext context(& GetBuffer());
2878     hit = GetBuffer().HitTest(dc, context, GetUnscaledPoint(logicalPt), position, &hitObj, &contextObj, flags);
2879     wxRichTextParagraphLayoutBox* container = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
2880
2881     return container;
2882 }
2883
2884
2885 // ----------------------------------------------------------------------------
2886 // set/get the controls text
2887 // ----------------------------------------------------------------------------
2888
2889 wxString wxRichTextCtrl::DoGetValue() const
2890 {
2891     return GetBuffer().GetText();
2892 }
2893
2894 wxString wxRichTextCtrl::GetRange(long from, long to) const
2895 {
2896     // Public API for range is different from internals
2897     return GetFocusObject()->GetTextForRange(wxRichTextRange(from, to-1));
2898 }
2899
2900 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2901 {
2902     // Don't call Clear here, since it always sends a text updated event
2903     m_buffer.ResetAndClearCommands();
2904     m_buffer.Invalidate(wxRICHTEXT_ALL);
2905     m_caretPosition = -1;
2906     m_caretPositionForDefaultStyle = -2;
2907     m_caretAtLineStart = false;
2908     m_selection.Reset();
2909     m_selectionState = wxRichTextCtrlSelectionState_Normal;
2910
2911     Scroll(0,0);
2912
2913     if (!IsFrozen())
2914     {
2915         LayoutContent();
2916         Refresh(false);
2917     }
2918
2919     if (!value.IsEmpty())
2920     {
2921         // Remove empty paragraph
2922         GetBuffer().Clear();
2923         DoWriteText(value, flags);
2924
2925         // for compatibility, don't move the cursor when doing SetValue()
2926         SetInsertionPoint(0);
2927     }
2928     else
2929     {
2930         // still send an event for consistency
2931         if (flags & SetValue_SendEvent)
2932             wxTextCtrl::SendTextUpdatedEvent(this);
2933     }
2934     DiscardEdits();
2935 }
2936
2937 void wxRichTextCtrl::WriteText(const wxString& value)
2938 {
2939     DoWriteText(value);
2940 }
2941
2942 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2943 {
2944     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2945
2946     GetFocusObject()->InsertTextWithUndo(& GetBuffer(), m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2947     GetBuffer().Defragment();
2948
2949     if ( flags & SetValue_SendEvent )
2950         wxTextCtrl::SendTextUpdatedEvent(this);
2951 }
2952
2953 void wxRichTextCtrl::AppendText(const wxString& text)
2954 {
2955     SetInsertionPointEnd();
2956
2957     WriteText(text);
2958 }
2959
2960 /// Write an image at the current insertion point
2961 bool wxRichTextCtrl::WriteImage(const wxImage& image, wxBitmapType bitmapType, const wxRichTextAttr& textAttr)
2962 {
2963     wxRichTextImageBlock imageBlock;
2964
2965     wxImage image2 = image;
2966     if (imageBlock.MakeImageBlock(image2, bitmapType))
2967         return WriteImage(imageBlock, textAttr);
2968
2969     return false;
2970 }
2971
2972 bool wxRichTextCtrl::WriteImage(const wxString& filename, wxBitmapType bitmapType, const wxRichTextAttr& textAttr)
2973 {
2974     wxRichTextImageBlock imageBlock;
2975
2976     wxImage image;
2977     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2978         return WriteImage(imageBlock, textAttr);
2979
2980     return false;
2981 }
2982
2983 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock, const wxRichTextAttr& textAttr)
2984 {
2985     return GetFocusObject()->InsertImageWithUndo(& GetBuffer(), m_caretPosition+1, imageBlock, this, 0, textAttr);
2986 }
2987
2988 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, wxBitmapType bitmapType, const wxRichTextAttr& textAttr)
2989 {
2990     if (bitmap.IsOk())
2991     {
2992         wxRichTextImageBlock imageBlock;
2993
2994         wxImage image = bitmap.ConvertToImage();
2995         if (image.IsOk() && imageBlock.MakeImageBlock(image, bitmapType))
2996             return WriteImage(imageBlock, textAttr);
2997     }
2998
2999     return false;
3000 }
3001
3002 // Write a text box at the current insertion point.
3003 wxRichTextBox* wxRichTextCtrl::WriteTextBox(const wxRichTextAttr& textAttr)
3004 {
3005     wxRichTextBox* textBox = new wxRichTextBox;
3006     textBox->SetAttributes(textAttr);
3007     textBox->SetParent(& GetBuffer()); // set parent temporarily for AddParagraph to use correct style
3008     textBox->AddParagraph(wxEmptyString);
3009     textBox->SetParent(NULL);
3010
3011     // The object returned is the one actually inserted into the buffer,
3012     // while the original one is deleted.
3013     wxRichTextObject* obj = GetFocusObject()->InsertObjectWithUndo(& GetBuffer(), m_caretPosition+1, textBox, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
3014     wxRichTextBox* box = wxDynamicCast(obj, wxRichTextBox);
3015     return box;
3016 }
3017
3018 wxRichTextField* wxRichTextCtrl::WriteField(const wxString& fieldType, const wxRichTextProperties& properties,
3019                             const wxRichTextAttr& textAttr)
3020 {
3021     return GetFocusObject()->InsertFieldWithUndo(& GetBuffer(), m_caretPosition+1, fieldType, properties,
3022                 this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE, textAttr);
3023 }
3024
3025 // Write a table at the current insertion point, returning the table.
3026 wxRichTextTable* wxRichTextCtrl::WriteTable(int rows, int cols, const wxRichTextAttr& tableAttr, const wxRichTextAttr& cellAttr)
3027 {
3028     wxASSERT(rows > 0 && cols > 0);
3029
3030     if (rows <= 0 || cols <= 0)
3031         return NULL;
3032
3033     wxRichTextTable* table = new wxRichTextTable;
3034     table->SetAttributes(tableAttr);
3035     table->SetParent(& GetBuffer()); // set parent temporarily for AddParagraph to use correct style
3036
3037     table->CreateTable(rows, cols);
3038
3039     table->SetParent(NULL);
3040
3041     int i, j;
3042     for (j = 0; j < rows; j++)
3043     {
3044         for (i = 0; i < cols; i++)
3045         {
3046             table->GetCell(j, i)->GetAttributes() = cellAttr;
3047         }
3048     }
3049
3050     // The object returned is the one actually inserted into the buffer,
3051     // while the original one is deleted.
3052     wxRichTextObject* obj = GetFocusObject()->InsertObjectWithUndo(& GetBuffer(), m_caretPosition+1, table, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
3053     wxRichTextTable* tableResult = wxDynamicCast(obj, wxRichTextTable);
3054     return tableResult;
3055 }
3056
3057
3058 /// Insert a newline (actually paragraph) at the current insertion point.
3059 bool wxRichTextCtrl::Newline()
3060 {
3061     return GetFocusObject()->InsertNewlineWithUndo(& GetBuffer(), m_caretPosition+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
3062 }
3063
3064 /// Insert a line break at the current insertion point.
3065 bool wxRichTextCtrl::LineBreak()
3066 {
3067     wxString text;
3068     text = wxRichTextLineBreakChar;
3069     return GetFocusObject()->InsertTextWithUndo(& GetBuffer(), m_caretPosition+1, text, this);
3070 }
3071
3072 // ----------------------------------------------------------------------------
3073 // Clipboard operations
3074 // ----------------------------------------------------------------------------
3075
3076 void wxRichTextCtrl::Copy()
3077 {
3078     if (CanCopy())
3079     {
3080         wxRichTextRange range = GetInternalSelectionRange();
3081         GetBuffer().CopyToClipboard(range);
3082     }
3083 }
3084
3085 void wxRichTextCtrl::Cut()
3086 {
3087     if (CanCut())
3088     {
3089         wxRichTextRange range = GetInternalSelectionRange();
3090         GetBuffer().CopyToClipboard(range);
3091
3092         DeleteSelectedContent();
3093         LayoutContent();
3094         Refresh(false);
3095     }
3096 }
3097
3098 void wxRichTextCtrl::Paste()
3099 {
3100     if (CanPaste())
3101     {
3102         BeginBatchUndo(_("Paste"));
3103
3104         long newPos = m_caretPosition;
3105         DeleteSelectedContent(& newPos);
3106
3107         GetBuffer().PasteFromClipboard(newPos);
3108
3109         EndBatchUndo();
3110     }
3111 }
3112
3113 void wxRichTextCtrl::DeleteSelection()
3114 {
3115     if (CanDeleteSelection())
3116     {
3117         DeleteSelectedContent();
3118     }
3119 }
3120
3121 bool wxRichTextCtrl::HasSelection() const
3122 {
3123     return (m_selection.IsValid() && m_selection.GetContainer() == GetFocusObject());
3124 }
3125
3126 bool wxRichTextCtrl::HasUnfocusedSelection() const
3127 {
3128     return m_selection.IsValid();
3129 }
3130
3131 bool wxRichTextCtrl::CanCopy() const
3132 {
3133     // Can copy if there's a selection
3134     return HasSelection();
3135 }
3136
3137 bool wxRichTextCtrl::CanCut() const
3138 {
3139     return CanDeleteSelection();
3140 }
3141
3142 bool wxRichTextCtrl::CanPaste() const
3143 {
3144     if ( !IsEditable() || !GetFocusObject() || !CanInsertContent(* GetFocusObject(), m_caretPosition+1))
3145         return false;
3146
3147     return GetBuffer().CanPasteFromClipboard();
3148 }
3149
3150 bool wxRichTextCtrl::CanDeleteSelection() const
3151 {
3152     return HasSelection() && IsEditable() && CanDeleteRange(* GetFocusObject(), GetSelectionRange());
3153 }
3154
3155
3156 // ----------------------------------------------------------------------------
3157 // Accessors
3158 // ----------------------------------------------------------------------------
3159
3160 void wxRichTextCtrl::SetContextMenu(wxMenu* menu)
3161 {
3162     if (m_contextMenu && m_contextMenu != menu)
3163         delete m_contextMenu;
3164     m_contextMenu = menu;
3165 }
3166
3167 void wxRichTextCtrl::SetEditable(bool editable)
3168 {
3169     m_editable = editable;
3170 }
3171
3172 void wxRichTextCtrl::SetInsertionPoint(long pos)
3173 {
3174     SelectNone();
3175
3176     m_caretPosition = pos - 1;
3177
3178     PositionCaret();
3179
3180     SetDefaultStyleToCursorStyle();
3181 }
3182
3183 void wxRichTextCtrl::SetInsertionPointEnd()
3184 {
3185     long pos = GetLastPosition();
3186     SetInsertionPoint(pos);
3187 }
3188
3189 long wxRichTextCtrl::GetInsertionPoint() const
3190 {
3191     return m_caretPosition+1;
3192 }
3193
3194 wxTextPos wxRichTextCtrl::GetLastPosition() const
3195 {
3196     return GetFocusObject()->GetOwnRange().GetEnd();
3197 }
3198
3199 // If the return values from and to are the same, there is no
3200 // selection.
3201 void wxRichTextCtrl::GetSelection(long* from, long* to) const
3202 {
3203     if (m_selection.IsValid())
3204     {
3205         *from = m_selection.GetRange().GetStart();
3206         *to = m_selection.GetRange().GetEnd();
3207         (*to) ++;
3208     }
3209     else
3210     {
3211         *from = -2;
3212         *to = -2;
3213     }
3214 }
3215
3216 bool wxRichTextCtrl::IsEditable() const
3217 {
3218     return m_editable;
3219 }
3220
3221 // ----------------------------------------------------------------------------
3222 // selection
3223 // ----------------------------------------------------------------------------
3224
3225 void wxRichTextCtrl::SetSelection(long from, long to)
3226 {
3227     // if from and to are both -1, it means (in wxWidgets) that all text should
3228     // be selected.
3229     if ( (from == -1) && (to == -1) )
3230     {
3231         from = 0;
3232         to = GetLastPosition()+1;
3233     }
3234
3235     if (from == to)
3236     {
3237         SelectNone();
3238     }
3239     else
3240     {
3241         wxRichTextSelection oldSelection = m_selection;
3242
3243         m_selectionAnchor = from-1;
3244         m_selectionAnchorObject = NULL;
3245         m_selection.Set(wxRichTextRange(from, to-1), GetFocusObject());
3246
3247         m_caretPosition = wxMax(-1, to-1);
3248
3249         RefreshForSelectionChange(oldSelection, m_selection);
3250         PositionCaret();
3251     }
3252 }
3253
3254 // ----------------------------------------------------------------------------
3255 // Editing
3256 // ----------------------------------------------------------------------------
3257
3258 void wxRichTextCtrl::Replace(long from, long to,
3259                              const wxString& value)
3260 {
3261     BeginBatchUndo(_("Replace"));
3262
3263     SetSelection(from, to);
3264
3265     wxRichTextAttr attr = GetDefaultStyle();
3266
3267     DeleteSelectedContent();
3268
3269     SetDefaultStyle(attr);
3270
3271     DoWriteText(value, SetValue_SelectionOnly);
3272
3273     EndBatchUndo();
3274 }
3275
3276 void wxRichTextCtrl::Remove(long from, long to)
3277 {
3278     SelectNone();
3279
3280     GetFocusObject()->DeleteRangeWithUndo(wxRichTextRange(from, to-1), this, & GetBuffer());
3281
3282     LayoutContent();
3283     if (!IsFrozen())
3284         Refresh(false);
3285 }
3286
3287 bool wxRichTextCtrl::IsModified() const
3288 {
3289     return m_buffer.IsModified();
3290 }
3291
3292 void wxRichTextCtrl::MarkDirty()
3293 {
3294     m_buffer.Modify(true);
3295 }
3296
3297 void wxRichTextCtrl::DiscardEdits()
3298 {
3299     m_caretPositionForDefaultStyle = -2;
3300     m_buffer.Modify(false);
3301     m_buffer.GetCommandProcessor()->ClearCommands();
3302 }
3303
3304 int wxRichTextCtrl::GetNumberOfLines() const
3305 {
3306     return GetFocusObject()->GetParagraphCount();
3307 }
3308
3309 // ----------------------------------------------------------------------------
3310 // Positions <-> coords
3311 // ----------------------------------------------------------------------------
3312
3313 long wxRichTextCtrl::XYToPosition(long x, long y) const
3314 {
3315     return GetFocusObject()->XYToPosition(x, y);
3316 }
3317
3318 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
3319 {
3320     return GetFocusObject()->PositionToXY(pos, x, y);
3321 }
3322
3323 // ----------------------------------------------------------------------------
3324 //
3325 // ----------------------------------------------------------------------------
3326
3327 void wxRichTextCtrl::ShowPosition(long pos)
3328 {
3329     if (!IsPositionVisible(pos))
3330         ScrollIntoView(pos-1, WXK_DOWN);
3331 }
3332
3333 int wxRichTextCtrl::GetLineLength(long lineNo) const
3334 {
3335     return GetFocusObject()->GetParagraphLength(lineNo);
3336 }
3337
3338 wxString wxRichTextCtrl::GetLineText(long lineNo) const
3339 {
3340     return GetFocusObject()->GetParagraphText(lineNo);
3341 }
3342
3343 // ----------------------------------------------------------------------------
3344 // Undo/redo
3345 // ----------------------------------------------------------------------------
3346
3347 void wxRichTextCtrl::Undo()
3348 {
3349     if (CanUndo())
3350     {
3351         GetCommandProcessor()->Undo();
3352     }
3353 }
3354
3355 void wxRichTextCtrl::Redo()
3356 {
3357     if (CanRedo())
3358     {
3359         GetCommandProcessor()->Redo();
3360     }
3361 }
3362
3363 bool wxRichTextCtrl::CanUndo() const
3364 {
3365     return GetCommandProcessor()->CanUndo() && IsEditable();
3366 }
3367
3368 bool wxRichTextCtrl::CanRedo() const
3369 {
3370     return GetCommandProcessor()->CanRedo() && IsEditable();
3371 }
3372
3373 // ----------------------------------------------------------------------------
3374 // implementation details
3375 // ----------------------------------------------------------------------------
3376
3377 void wxRichTextCtrl::Command(wxCommandEvent& event)
3378 {
3379     SetValue(event.GetString());
3380     GetEventHandler()->ProcessEvent(event);
3381 }
3382
3383 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
3384 {
3385     // By default, load the first file into the text window.
3386     if (event.GetNumberOfFiles() > 0)
3387     {
3388         LoadFile(event.GetFiles()[0]);
3389     }
3390 }
3391
3392 wxSize wxRichTextCtrl::DoGetBestSize() const
3393 {
3394     return wxSize(10, 10);
3395 }
3396
3397 // ----------------------------------------------------------------------------
3398 // standard handlers for standard edit menu events
3399 // ----------------------------------------------------------------------------
3400
3401 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
3402 {
3403     Cut();
3404 }
3405
3406 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
3407 {
3408     DeleteSelection();
3409 }
3410
3411 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
3412 {
3413     Copy();
3414 }
3415
3416 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
3417 {
3418     Paste();
3419 }
3420
3421 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
3422 {
3423     Undo();
3424 }
3425
3426 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
3427 {
3428     Redo();
3429 }
3430
3431 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
3432 {
3433     event.Enable( CanCut() );
3434 }
3435
3436 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
3437 {
3438     event.Enable( CanCopy() );
3439 }
3440
3441 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
3442 {
3443     event.Enable( CanDeleteSelection() );
3444 }
3445
3446 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
3447 {
3448     event.Enable( CanPaste() );
3449 }
3450
3451 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
3452 {
3453     event.Enable( CanUndo() );
3454     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
3455 }
3456
3457 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
3458 {
3459     event.Enable( CanRedo() );
3460     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
3461 }
3462
3463 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
3464 {
3465     if (GetLastPosition() > 0)
3466         SelectAll();
3467 }
3468
3469 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
3470 {
3471     event.Enable(GetLastPosition() > 0);
3472 }
3473
3474 void wxRichTextCtrl::OnProperties(wxCommandEvent& event)
3475 {
3476     int idx = event.GetId() - wxID_RICHTEXT_PROPERTIES1;
3477     if (idx >= 0 && idx < m_contextMenuPropertiesInfo.GetCount())
3478     {
3479         wxRichTextObject* obj = m_contextMenuPropertiesInfo.GetObject(idx);
3480         if (obj && CanEditProperties(obj))
3481             EditProperties(obj, this);
3482
3483         m_contextMenuPropertiesInfo.Clear();
3484     }
3485 }
3486
3487 void wxRichTextCtrl::OnUpdateProperties(wxUpdateUIEvent& event)
3488 {
3489     int idx = event.GetId() - wxID_RICHTEXT_PROPERTIES1;
3490     event.Enable(idx >= 0 && idx < m_contextMenuPropertiesInfo.GetCount());
3491 }
3492
3493 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
3494 {
3495     if (event.GetEventObject() != this)
3496     {
3497         event.Skip();
3498         return;
3499     }
3500
3501     ShowContextMenu(m_contextMenu, event.GetPosition());
3502 }
3503
3504 // Prepares the context menu, adding appropriate property-editing commands.
3505 // Returns the number of property commands added.
3506 int wxRichTextCtrl::PrepareContextMenu(wxMenu* menu, const wxPoint& pt, bool addPropertyCommands)
3507 {
3508     wxClientDC dc(this);
3509     PrepareDC(dc);
3510     dc.SetFont(GetFont());
3511
3512     m_contextMenuPropertiesInfo.Clear();
3513
3514     long position = 0;
3515     wxRichTextObject* hitObj = NULL;
3516     wxRichTextObject* contextObj = NULL;
3517     if (pt != wxDefaultPosition)
3518     {
3519         wxPoint logicalPt = GetLogicalPoint(ScreenToClient(pt));
3520         wxRichTextDrawingContext context(& GetBuffer());
3521         int hit = GetBuffer().HitTest(dc, context, GetUnscaledPoint(logicalPt), position, & hitObj, & contextObj);
3522
3523         if (hit == wxRICHTEXT_HITTEST_ON || hit == wxRICHTEXT_HITTEST_BEFORE || hit == wxRICHTEXT_HITTEST_AFTER)
3524         {
3525             wxRichTextParagraphLayoutBox* actualContainer = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
3526             if (hitObj && actualContainer)
3527             {
3528                 if (actualContainer->AcceptsFocus())
3529                 {
3530                     SetFocusObject(actualContainer, false /* don't set caret position yet */);
3531                     SetCaretPositionAfterClick(actualContainer, position, hit);
3532                 }
3533
3534                 if (addPropertyCommands)
3535                     m_contextMenuPropertiesInfo.AddItems(this, actualContainer, hitObj);
3536             }
3537             else
3538             {
3539                 if (addPropertyCommands)
3540                     m_contextMenuPropertiesInfo.AddItems(this, GetFocusObject(), NULL);
3541             }
3542         }
3543         else
3544         {
3545             if (addPropertyCommands)
3546                 m_contextMenuPropertiesInfo.AddItems(this, GetFocusObject(), NULL);
3547         }
3548     }
3549     else
3550     {
3551         // Invoked from the keyboard, so don't set the caret position and don't use the event
3552         // position
3553         hitObj = GetFocusObject()->GetLeafObjectAtPosition(m_caretPosition+1);
3554         if (hitObj)
3555             contextObj = hitObj->GetParentContainer();
3556         else
3557             contextObj = GetFocusObject();
3558
3559         wxRichTextParagraphLayoutBox* actualContainer = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
3560         if (hitObj && actualContainer)
3561         {
3562             if (addPropertyCommands)
3563                 m_contextMenuPropertiesInfo.AddItems(this, actualContainer, hitObj);
3564         }
3565         else
3566         {
3567             if (addPropertyCommands)
3568                 m_contextMenuPropertiesInfo.AddItems(this, GetFocusObject(), NULL);
3569         }
3570     }
3571
3572     if (menu)
3573     {
3574         if (addPropertyCommands)
3575             m_contextMenuPropertiesInfo.AddMenuItems(menu);
3576         return m_contextMenuPropertiesInfo.GetCount();
3577     }
3578     else
3579         return 0;
3580 }
3581
3582 // Shows the context menu, adding appropriate property-editing commands
3583 bool wxRichTextCtrl::ShowContextMenu(wxMenu* menu, const wxPoint& pt, bool addPropertyCommands)
3584 {
3585     if (menu)
3586     {
3587         PrepareContextMenu(menu, pt, addPropertyCommands);
3588         PopupMenu(menu);
3589         return true;
3590     }
3591     else
3592         return false;
3593 }
3594
3595 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
3596 {
3597     return GetFocusObject()->SetStyle(wxRichTextRange(start, end-1), wxRichTextAttr(style));
3598 }
3599
3600 bool wxRichTextCtrl::SetStyle(long start, long end, const wxRichTextAttr& style)
3601 {
3602     return GetFocusObject()->SetStyle(wxRichTextRange(start, end-1), style);
3603 }
3604
3605 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxTextAttr& style)
3606 {
3607     return GetFocusObject()->SetStyle(range.ToInternal(), wxRichTextAttr(style));
3608 }
3609
3610 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxRichTextAttr& style)
3611 {
3612     return GetFocusObject()->SetStyle(range.ToInternal(), style);
3613 }
3614
3615 void wxRichTextCtrl::SetStyle(wxRichTextObject *obj, const wxRichTextAttr& textAttr, int flags)
3616 {
3617     GetFocusObject()->SetStyle(obj, textAttr, flags);
3618 }
3619
3620 // extended style setting operation with flags including:
3621 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
3622 // see richtextbuffer.h for more details.
3623
3624 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxRichTextAttr& style, int flags)
3625 {
3626     return GetFocusObject()->SetStyle(range.ToInternal(), style, flags);
3627 }
3628
3629 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
3630 {
3631     return GetBuffer().SetDefaultStyle(style);
3632 }
3633
3634 bool wxRichTextCtrl::SetDefaultStyle(const wxRichTextAttr& style)
3635 {
3636     wxRichTextAttr attr1(style);
3637     attr1.GetTextBoxAttr().Reset();
3638     return GetBuffer().SetDefaultStyle(attr1);
3639 }
3640
3641 const wxRichTextAttr& wxRichTextCtrl::GetDefaultStyleEx() const
3642 {
3643     return GetBuffer().GetDefaultStyle();
3644 }
3645
3646 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
3647 {
3648     wxRichTextAttr attr;
3649     if (GetFocusObject()->GetStyle(position, attr))
3650     {
3651         style = attr;
3652         return true;
3653     }
3654     else
3655         return false;
3656 }
3657
3658 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style)
3659 {
3660     return GetFocusObject()->GetStyle(position, style);
3661 }
3662
3663 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style, wxRichTextParagraphLayoutBox* container)
3664 {
3665     wxRichTextAttr attr;
3666     if (container->GetStyle(position, attr))
3667     {
3668         style = attr;
3669         return true;
3670     }
3671     else
3672         return false;
3673 }
3674
3675 // get the common set of styles for the range
3676 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttr& style)
3677 {
3678     wxRichTextAttr attr;
3679     if (GetFocusObject()->GetStyleForRange(range.ToInternal(), attr))
3680     {
3681         style = attr;
3682         return true;
3683     }
3684     else
3685         return false;
3686 }
3687
3688 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxRichTextAttr& style)
3689 {
3690     return GetFocusObject()->GetStyleForRange(range.ToInternal(), style);
3691 }
3692
3693 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxRichTextAttr& style, wxRichTextParagraphLayoutBox* container)
3694 {
3695     return container->GetStyleForRange(range.ToInternal(), style);
3696 }
3697
3698 /// Get the content (uncombined) attributes for this position.
3699 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style)
3700 {
3701     return GetFocusObject()->GetUncombinedStyle(position, style);
3702 }
3703
3704 /// Get the content (uncombined) attributes for this position.
3705 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style, wxRichTextParagraphLayoutBox* container)
3706 {
3707     return container->GetUncombinedStyle(position, style);
3708 }
3709
3710 bool wxRichTextCtrl::SetProperties(const wxRichTextRange& range, const wxRichTextProperties& properties, int flags)
3711 {
3712     return GetFocusObject()->SetProperties(range.ToInternal(), properties, flags);
3713 }
3714
3715 /// Set font, and also the buffer attributes
3716 bool wxRichTextCtrl::SetFont(const wxFont& font)
3717 {
3718     wxControl::SetFont(font);
3719
3720     wxRichTextAttr attr = GetBuffer().GetAttributes();
3721     attr.SetFont(font);
3722     GetBuffer().SetBasicStyle(attr);
3723
3724     GetBuffer().Invalidate(wxRICHTEXT_ALL);
3725     Refresh(false);
3726
3727     return true;
3728 }
3729
3730 /// Transform logical to physical
3731 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
3732 {
3733     wxPoint pt;
3734     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
3735
3736     return pt;
3737 }
3738
3739 /// Transform physical to logical
3740 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
3741 {
3742     wxPoint pt;
3743     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
3744
3745     return pt;
3746 }
3747
3748 /// Position the caret
3749 void wxRichTextCtrl::PositionCaret(wxRichTextParagraphLayoutBox* container)
3750 {
3751     if (!GetCaret())
3752         return;
3753
3754     //wxLogDebug(wxT("PositionCaret"));
3755
3756     wxRect caretRect;
3757     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect, container))
3758     {
3759         caretRect = GetScaledRect(caretRect);
3760         int topMargin = (int) (0.5 + GetScale()*GetBuffer().GetTopMargin());
3761         int bottomMargin = (int) (0.5 + GetScale()*GetBuffer().GetBottomMargin());
3762         wxPoint newPt = caretRect.GetPosition();
3763         wxSize newSz = caretRect.GetSize();
3764         wxPoint pt = GetPhysicalPoint(newPt);
3765         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
3766         {
3767             GetCaret()->Hide();
3768             if (GetCaret()->GetSize() != newSz)
3769                 GetCaret()->SetSize(newSz);
3770
3771             // Adjust size so the caret size and position doesn't appear in the margins
3772             if (((pt.y + newSz.y) <= topMargin) || (pt.y >= (GetClientSize().y - bottomMargin)))
3773             {
3774                 pt.x = -200;
3775                 pt.y = -200;
3776             }
3777             else if (pt.y < topMargin && (pt.y + newSz.y) > topMargin)
3778             {
3779                 newSz.y -= (topMargin - pt.y);
3780                 if (newSz.y > 0)
3781                 {
3782                     pt.y = topMargin;
3783                     GetCaret()->SetSize(newSz);
3784                 }
3785             }
3786             else if (pt.y < (GetClientSize().y - bottomMargin) && (pt.y + newSz.y) > (GetClientSize().y - bottomMargin))
3787             {
3788                 newSz.y = GetClientSize().y - bottomMargin - pt.y;
3789                 GetCaret()->SetSize(newSz);
3790             }
3791
3792             GetCaret()->Move(pt);
3793             GetCaret()->Show();
3794         }
3795     }
3796 }
3797
3798 /// Get the caret height and position for the given character position
3799 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect, wxRichTextParagraphLayoutBox* container)
3800 {
3801     wxClientDC dc(this);
3802     PrepareDC(dc);
3803     dc.SetUserScale(GetScale(), GetScale());
3804     dc.SetFont(GetFont());
3805
3806     wxPoint pt;
3807     int height = 0;
3808
3809     if (!container)
3810         container = GetFocusObject();
3811
3812     wxRichTextDrawingContext context(& GetBuffer());
3813     if (container->FindPosition(dc, context, position, pt, & height, m_caretAtLineStart))
3814     {
3815         // Caret height can't be zero
3816         if (height == 0)
3817             height = dc.GetCharHeight();
3818
3819         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
3820         return true;
3821     }
3822
3823     return false;
3824 }
3825
3826 /// Gets the line for the visible caret position. If the caret is
3827 /// shown at the very end of the line, it means the next character is actually
3828 /// on the following line. So let's get the line we're expecting to find
3829 /// if this is the case.
3830 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
3831 {
3832     wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(caretPosition, true);
3833     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(caretPosition, true);
3834     if (line)
3835     {
3836         wxRichTextRange lineRange = line->GetAbsoluteRange();
3837         if (caretPosition == lineRange.GetStart()-1 &&
3838             (para->GetRange().GetStart() != lineRange.GetStart()))
3839         {
3840             if (!m_caretAtLineStart)
3841                 line = GetFocusObject()->GetLineAtPosition(caretPosition-1, true);
3842         }
3843     }
3844     return line;
3845 }
3846
3847
3848 /// Move the caret to the given character position
3849 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart, wxRichTextParagraphLayoutBox* container)
3850 {
3851     if (GetBuffer().IsDirty())
3852         LayoutContent();
3853
3854     if (!container)
3855         container = GetFocusObject();
3856
3857     if (pos <= container->GetOwnRange().GetEnd())
3858     {
3859         SetCaretPosition(pos, showAtLineStart);
3860
3861         PositionCaret(container);
3862
3863         return true;
3864     }
3865     else
3866         return false;
3867 }
3868
3869 /// Layout the buffer: which we must do before certain operations, such as
3870 /// setting the caret position.
3871 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
3872 {
3873     if (GetBuffer().IsDirty() || onlyVisibleRect)
3874     {
3875         wxRect availableSpace(GetUnscaledSize(GetClientSize()));
3876         if (availableSpace.width == 0)
3877             availableSpace.width = 10;
3878         if (availableSpace.height == 0)
3879             availableSpace.height = 10;
3880
3881         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
3882         if (onlyVisibleRect)
3883         {
3884             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
3885             availableSpace.SetPosition(GetUnscaledPoint(GetLogicalPoint(wxPoint(0, 0))));
3886         }
3887
3888         wxClientDC dc(this);
3889
3890         PrepareDC(dc);
3891         dc.SetFont(GetFont());
3892
3893         wxRichTextDrawingContext context(& GetBuffer());
3894         GetBuffer().Defragment();
3895         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
3896         GetBuffer().Layout(dc, context, availableSpace, availableSpace, flags);
3897         GetBuffer().Invalidate(wxRICHTEXT_NONE);
3898
3899         if (!IsFrozen())
3900             SetupScrollbars();
3901     }
3902
3903     return true;
3904 }
3905
3906 /// Is all of the selection, or the current caret position, bold?
3907 bool wxRichTextCtrl::IsSelectionBold()
3908 {
3909     if (HasSelection())
3910     {
3911         wxRichTextAttr attr;
3912         wxRichTextRange range = GetSelectionRange();
3913         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3914         attr.SetFontWeight(wxFONTWEIGHT_BOLD);
3915
3916         return HasCharacterAttributes(range, attr);
3917     }
3918     else
3919     {
3920         // If no selection, then we need to combine current style with default style
3921         // to see what the effect would be if we started typing.
3922         wxRichTextAttr attr;
3923         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3924
3925         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3926         if (GetStyle(pos, attr))
3927         {
3928             if (IsDefaultStyleShowing())
3929                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3930             return attr.GetFontWeight() == wxFONTWEIGHT_BOLD;
3931         }
3932     }
3933     return false;
3934 }
3935
3936 /// Is all of the selection, or the current caret position, italics?
3937 bool wxRichTextCtrl::IsSelectionItalics()
3938 {
3939     if (HasSelection())
3940     {
3941         wxRichTextRange range = GetSelectionRange();
3942         wxRichTextAttr attr;
3943         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3944         attr.SetFontStyle(wxFONTSTYLE_ITALIC);
3945
3946         return HasCharacterAttributes(range, attr);
3947     }
3948     else
3949     {
3950         // If no selection, then we need to combine current style with default style
3951         // to see what the effect would be if we started typing.
3952         wxRichTextAttr attr;
3953         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3954
3955         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3956         if (GetStyle(pos, attr))
3957         {
3958             if (IsDefaultStyleShowing())
3959                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3960             return attr.GetFontStyle() == wxFONTSTYLE_ITALIC;
3961         }
3962     }
3963     return false;
3964 }
3965
3966 /// Is all of the selection, or the current caret position, underlined?
3967 bool wxRichTextCtrl::IsSelectionUnderlined()
3968 {
3969     if (HasSelection())
3970     {
3971         wxRichTextRange range = GetSelectionRange();
3972         wxRichTextAttr attr;
3973         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3974         attr.SetFontUnderlined(true);
3975
3976         return HasCharacterAttributes(range, attr);
3977     }
3978     else
3979     {
3980         // If no selection, then we need to combine current style with default style
3981         // to see what the effect would be if we started typing.
3982         wxRichTextAttr attr;
3983         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3984         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3985
3986         if (GetStyle(pos, attr))
3987         {
3988             if (IsDefaultStyleShowing())
3989                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3990             return attr.GetFontUnderlined();
3991         }
3992     }
3993     return false;
3994 }
3995
3996 /// Does all of the selection, or the current caret position, have this wxTextAttrEffects flag(s)?
3997 bool wxRichTextCtrl::DoesSelectionHaveTextEffectFlag(int flag)
3998 {
3999     wxRichTextAttr attr;
4000     attr.SetFlags(wxTEXT_ATTR_EFFECTS);
4001     attr.SetTextEffectFlags(flag);
4002     attr.SetTextEffects(flag);
4003
4004     if (HasSelection())
4005     {
4006         return HasCharacterAttributes(GetSelectionRange(), attr);
4007     }
4008     else
4009     {
4010         // If no selection, then we need to combine current style with default style
4011         // to see what the effect would be if we started typing.
4012         long pos = GetAdjustedCaretPosition(GetCaretPosition());
4013         if (GetStyle(pos, attr))
4014         {
4015             if (IsDefaultStyleShowing())
4016                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
4017             return (attr.GetTextEffectFlags() & flag) != 0;
4018         }
4019     }
4020     return false;
4021 }
4022
4023 /// Apply bold to the selection
4024 bool wxRichTextCtrl::ApplyBoldToSelection()
4025 {
4026     wxRichTextAttr attr;
4027     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
4028     attr.SetFontWeight(IsSelectionBold() ? wxFONTWEIGHT_NORMAL : wxFONTWEIGHT_BOLD);
4029
4030     if (HasSelection())
4031         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
4032     else
4033     {
4034         wxRichTextAttr current = GetDefaultStyleEx();
4035         current.Apply(attr);
4036         SetAndShowDefaultStyle(current);
4037     }
4038     return true;
4039 }
4040
4041 /// Apply italic to the selection
4042 bool wxRichTextCtrl::ApplyItalicToSelection()
4043 {
4044     wxRichTextAttr attr;
4045     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
4046     attr.SetFontStyle(IsSelectionItalics() ? wxFONTSTYLE_NORMAL : wxFONTSTYLE_ITALIC);
4047
4048     if (HasSelection())
4049         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
4050     else
4051     {
4052         wxRichTextAttr current = GetDefaultStyleEx();
4053         current.Apply(attr);
4054         SetAndShowDefaultStyle(current);
4055     }
4056     return true;
4057 }
4058
4059 /// Apply underline to the selection
4060 bool wxRichTextCtrl::ApplyUnderlineToSelection()
4061 {
4062     wxRichTextAttr attr;
4063     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
4064     attr.SetFontUnderlined(!IsSelectionUnderlined());
4065
4066     if (HasSelection())
4067         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
4068     else
4069     {
4070         wxRichTextAttr current = GetDefaultStyleEx();
4071         current.Apply(attr);
4072         SetAndShowDefaultStyle(current);
4073     }
4074     return true;
4075 }
4076
4077 /// Apply the wxTextAttrEffects flag(s) to the selection, or the current caret position if there's no selection
4078 bool wxRichTextCtrl::ApplyTextEffectToSelection(int flags)
4079 {
4080     wxRichTextAttr attr;
4081     attr.SetFlags(wxTEXT_ATTR_EFFECTS);
4082     attr.SetTextEffectFlags(flags);
4083     if (!DoesSelectionHaveTextEffectFlag(flags))
4084         attr.SetTextEffects(flags);
4085      else
4086         attr.SetTextEffects(attr.GetTextEffectFlags() & ~flags);
4087
4088     if (HasSelection())
4089         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
4090     else
4091     {
4092         wxRichTextAttr current = GetDefaultStyleEx();
4093         current.Apply(attr);
4094         SetAndShowDefaultStyle(current);
4095     }
4096     return true;
4097 }
4098
4099 /// Is all of the selection aligned according to the specified flag?
4100 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
4101 {
4102     wxRichTextRange range;
4103     if (HasSelection())
4104         range = GetSelectionRange();
4105     else
4106         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
4107
4108     wxRichTextAttr attr;
4109     attr.SetAlignment(alignment);
4110
4111     return HasParagraphAttributes(range, attr);
4112 }
4113
4114 /// Apply alignment to the selection
4115 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
4116 {
4117     wxRichTextAttr attr;
4118     attr.SetAlignment(alignment);
4119     if (HasSelection())
4120         return SetStyle(GetSelectionRange(), attr);
4121     else
4122     {
4123         wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(GetCaretPosition()+1);
4124         if (para)
4125             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
4126     }
4127     return true;
4128 }
4129
4130 /// Apply a named style to the selection
4131 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
4132 {
4133     // Flags are defined within each definition, so only certain
4134     // attributes are applied.
4135     wxRichTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
4136
4137     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_RESET;
4138
4139     if (wxDynamicCast(def, wxRichTextListStyleDefinition))
4140     {
4141         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
4142
4143         wxRichTextRange range;
4144
4145         if (HasSelection())
4146             range = GetSelectionRange();
4147         else
4148         {
4149             long pos = GetAdjustedCaretPosition(GetCaretPosition());
4150             range = wxRichTextRange(pos, pos+1);
4151         }
4152
4153         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
4154     }
4155
4156     bool isPara = false;
4157
4158     // Make sure the attr has the style name
4159     if (wxDynamicCast(def, wxRichTextParagraphStyleDefinition))
4160     {
4161         isPara = true;
4162         attr.SetParagraphStyleName(def->GetName());
4163
4164         // If applying a paragraph style, we only want the paragraph nodes to adopt these
4165         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
4166         // to change its style independently.
4167         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
4168     }
4169     else if (wxDynamicCast(def, wxRichTextCharacterStyleDefinition))
4170         attr.SetCharacterStyleName(def->GetName());
4171     else if (wxDynamicCast(def, wxRichTextBoxStyleDefinition))
4172         attr.GetTextBoxAttr().SetBoxStyleName(def->GetName());
4173
4174     if (wxDynamicCast(def, wxRichTextBoxStyleDefinition))
4175     {
4176         if (GetFocusObject() && (GetFocusObject() != & GetBuffer()))
4177         {
4178             SetStyle(GetFocusObject(), attr);
4179             return true;
4180         }
4181         else
4182             return false;
4183     }
4184     else if (HasSelection())
4185         return SetStyleEx(GetSelectionRange(), attr, flags);
4186     else
4187     {
4188         wxRichTextAttr current = GetDefaultStyleEx();
4189         wxRichTextAttr defaultStyle(attr);
4190         if (isPara)
4191         {
4192             // Don't apply extra character styles since they are already implied
4193             // in the paragraph style
4194             defaultStyle.SetFlags(defaultStyle.GetFlags() & ~wxTEXT_ATTR_CHARACTER);
4195         }
4196         current.Apply(defaultStyle);
4197         SetAndShowDefaultStyle(current);
4198
4199         // If it's a paragraph style, we want to apply the style to the
4200         // current paragraph even if we didn't select any text.
4201         if (isPara)
4202         {
4203             long pos = GetAdjustedCaretPosition(GetCaretPosition());
4204             wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(pos);
4205             if (para)
4206             {
4207                 return SetStyleEx(para->GetRange().FromInternal(), attr, flags);
4208             }
4209         }
4210         return true;
4211     }
4212 }
4213
4214 /// Apply the style sheet to the buffer, for example if the styles have changed.
4215 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
4216 {
4217     if (!styleSheet)
4218         styleSheet = GetBuffer().GetStyleSheet();
4219     if (!styleSheet)
4220         return false;
4221
4222     if (GetBuffer().ApplyStyleSheet(styleSheet))
4223     {
4224         GetBuffer().Invalidate(wxRICHTEXT_ALL);
4225         Refresh(false);
4226         return true;
4227     }
4228     else
4229         return false;
4230 }
4231
4232 /// Sets the default style to the style under the cursor
4233 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
4234 {
4235     wxRichTextAttr attr;
4236     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
4237
4238     // If at the start of a paragraph, use the next position.
4239     long pos = GetAdjustedCaretPosition(GetCaretPosition());
4240
4241     wxRichTextObject* obj = GetFocusObject()->GetLeafObjectAtPosition(pos);
4242     if (obj && obj->IsTopLevel())
4243     {
4244         // Don't use the attributes of a top-level object, since they might apply
4245         // to content of the object, e.g. background colour.
4246         SetDefaultStyle(wxRichTextAttr());
4247         return true;
4248     }
4249     else if (GetUncombinedStyle(pos, attr))
4250     {
4251         SetDefaultStyle(attr);
4252         return true;
4253     }
4254
4255     return false;
4256 }
4257
4258 /// Returns the first visible position in the current view
4259 long wxRichTextCtrl::GetFirstVisiblePosition() const
4260 {
4261     wxRichTextLine* line = GetFocusObject()->GetLineAtYPosition(GetUnscaledPoint(GetLogicalPoint(wxPoint(0, 0))).y);
4262     if (line)
4263         return line->GetAbsoluteRange().GetStart();
4264     else
4265         return 0;
4266 }
4267
4268 /// Get the first visible point in the window
4269 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
4270 {
4271     int ppuX, ppuY;
4272     int startXUnits, startYUnits;
4273
4274     GetScrollPixelsPerUnit(& ppuX, & ppuY);
4275     GetViewStart(& startXUnits, & startYUnits);
4276
4277     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
4278 }
4279
4280 /// The adjusted caret position is the character position adjusted to take
4281 /// into account whether we're at the start of a paragraph, in which case
4282 /// style information should be taken from the next position, not current one.
4283 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
4284 {
4285     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(caretPos+1);
4286
4287     if (para && (caretPos+1 == para->GetRange().GetStart()))
4288         caretPos ++;
4289     return caretPos;
4290 }
4291
4292 /// Get/set the selection range in character positions. -1, -1 means no selection.
4293 /// The range is in API convention, i.e. a single character selection is denoted
4294 /// by (n, n+1)
4295 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
4296 {
4297     wxRichTextRange range = GetInternalSelectionRange();
4298     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
4299         range.SetEnd(range.GetEnd() + 1);
4300     return range;
4301 }
4302
4303 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
4304 {
4305     SetSelection(range.GetStart(), range.GetEnd());
4306 }
4307
4308 /// Set list style
4309 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
4310 {
4311     return GetFocusObject()->SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
4312 }
4313
4314 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
4315 {
4316     return GetFocusObject()->SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
4317 }
4318
4319 /// Clear list for given range
4320 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
4321 {
4322     return GetFocusObject()->ClearListStyle(range.ToInternal(), flags);
4323 }
4324
4325 /// Number/renumber any list elements in the given range
4326 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
4327 {
4328     return GetFocusObject()->NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
4329 }
4330
4331 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
4332 {
4333     return GetFocusObject()->NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
4334 }
4335
4336 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
4337 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
4338 {
4339     return GetFocusObject()->PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
4340 }
4341
4342 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
4343 {
4344     return GetFocusObject()->PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
4345 }
4346
4347 /// Deletes the content in the given range
4348 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
4349 {
4350     return GetFocusObject()->DeleteRangeWithUndo(range.ToInternal(), this, & GetBuffer());
4351 }
4352
4353 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
4354 {
4355     if (sm_availableFontNames.GetCount() == 0)
4356     {
4357         sm_availableFontNames = wxFontEnumerator::GetFacenames();
4358         sm_availableFontNames.Sort();
4359     }
4360     return sm_availableFontNames;
4361 }
4362
4363 void wxRichTextCtrl::ClearAvailableFontNames()
4364 {
4365     sm_availableFontNames.Clear();
4366 }
4367
4368 void wxRichTextCtrl::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
4369 {
4370     //wxLogDebug(wxT("wxRichTextCtrl::OnSysColourChanged"));
4371
4372     wxTextAttrEx basicStyle = GetBasicStyle();
4373     basicStyle.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
4374     SetBasicStyle(basicStyle);
4375     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
4376
4377     Refresh();
4378 }
4379
4380 // Refresh the area affected by a selection change
4381 bool wxRichTextCtrl::RefreshForSelectionChange(const wxRichTextSelection& oldSelection, const wxRichTextSelection& newSelection)
4382 {
4383     // If the selection is not part of the focus object, or we have multiple ranges, then the chances are that
4384     // the selection contains whole containers rather than just text, so refresh everything
4385     // for now as it would be hard to compute the rectangle bounding all selections.
4386     // TODO: improve on this.
4387     if ((oldSelection.IsValid() && (oldSelection.GetContainer() != GetFocusObject() || oldSelection.GetCount() > 1)) ||
4388         (newSelection.IsValid() && (newSelection.GetContainer() != GetFocusObject() || newSelection.GetCount() > 1)))
4389     {
4390         Refresh(false);
4391         return true;
4392     }
4393
4394     wxRichTextRange oldRange, newRange;
4395     if (oldSelection.IsValid())
4396         oldRange = oldSelection.GetRange();
4397     else
4398         oldRange = wxRICHTEXT_NO_SELECTION;
4399     if (newSelection.IsValid())
4400         newRange = newSelection.GetRange();
4401     else
4402         newRange = wxRICHTEXT_NO_SELECTION;
4403
4404     // Calculate the refresh rectangle - just the affected lines
4405     long firstPos, lastPos;
4406     if (oldRange.GetStart() == -2 && newRange.GetStart() != -2)
4407     {
4408         firstPos = newRange.GetStart();
4409         lastPos = newRange.GetEnd();
4410     }
4411     else if (oldRange.GetStart() != -2 && newRange.GetStart() == -2)
4412     {
4413         firstPos = oldRange.GetStart();
4414         lastPos = oldRange.GetEnd();
4415     }
4416     else if (oldRange.GetStart() == -2 && newRange.GetStart() == -2)
4417     {
4418         return false;
4419     }
4420     else
4421     {
4422         firstPos = wxMin(oldRange.GetStart(), newRange.GetStart());
4423         lastPos = wxMax(oldRange.GetEnd(), newRange.GetEnd());
4424     }
4425
4426     wxRichTextLine* firstLine = GetFocusObject()->GetLineAtPosition(firstPos);
4427     wxRichTextLine* lastLine = GetFocusObject()->GetLineAtPosition(lastPos);
4428
4429     if (firstLine && lastLine)
4430     {
4431         wxSize clientSize = GetClientSize();
4432         wxPoint pt1 = GetPhysicalPoint(GetScaledPoint(firstLine->GetAbsolutePosition()));
4433         wxPoint pt2 = GetPhysicalPoint(GetScaledPoint(lastLine->GetAbsolutePosition())) + wxPoint(0, (int) (0.5 + lastLine->GetSize().y * GetScale()));
4434
4435         pt1.x = 0;
4436         pt1.y = wxMax(0, pt1.y);
4437         pt2.x = 0;
4438         pt2.y = wxMin(clientSize.y, pt2.y);
4439
4440         wxRect rect(pt1, wxSize(clientSize.x, pt2.y - pt1.y));
4441         RefreshRect(rect, false);
4442     }
4443     else
4444         Refresh(false);
4445
4446     return true;
4447 }
4448
4449 // margins functions
4450 bool wxRichTextCtrl::DoSetMargins(const wxPoint& pt)
4451 {
4452     GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetLeft().SetValue(pt.x, wxTEXT_ATTR_UNITS_PIXELS);
4453     GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetRight().SetValue(pt.x, wxTEXT_ATTR_UNITS_PIXELS);
4454     GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetTop().SetValue(pt.y, wxTEXT_ATTR_UNITS_PIXELS);
4455     GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetBottom().SetValue(pt.y, wxTEXT_ATTR_UNITS_PIXELS);
4456
4457     return true;
4458 }
4459
4460 wxPoint wxRichTextCtrl::DoGetMargins() const
4461 {
4462     return wxPoint(GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetLeft().GetValue(),
4463                    GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetTop().GetValue());
4464 }
4465
4466 bool wxRichTextCtrl::SetFocusObject(wxRichTextParagraphLayoutBox* obj, bool setCaretPosition)
4467 {
4468     if (obj && !obj->AcceptsFocus())
4469         return false;
4470
4471     wxRichTextParagraphLayoutBox* oldContainer = GetFocusObject();
4472     bool changingContainer = (m_focusObject != obj);
4473
4474     if (changingContainer && HasSelection())
4475         SelectNone();
4476
4477     m_focusObject = obj;
4478
4479     if (!obj)
4480         m_focusObject = & m_buffer;
4481
4482     if (setCaretPosition && changingContainer)
4483     {
4484         m_selection.Reset();
4485         m_selectionAnchor = -2;
4486         m_selectionAnchorObject = NULL;
4487         m_selectionState = wxRichTextCtrlSelectionState_Normal;
4488
4489         long pos = -1;
4490
4491         m_caretAtLineStart = false;
4492         MoveCaret(pos, m_caretAtLineStart);
4493         SetDefaultStyleToCursorStyle();
4494
4495         wxRichTextEvent cmdEvent(
4496             wxEVT_COMMAND_RICHTEXT_FOCUS_OBJECT_CHANGED,
4497             GetId());
4498         cmdEvent.SetEventObject(this);
4499         cmdEvent.SetPosition(m_caretPosition+1);
4500         cmdEvent.SetOldContainer(oldContainer);
4501         cmdEvent.SetContainer(m_focusObject);
4502
4503         GetEventHandler()->ProcessEvent(cmdEvent);
4504     }
4505     return true;
4506 }
4507
4508 #if wxUSE_DRAG_AND_DROP
4509 void wxRichTextCtrl::OnDrop(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxDragResult def, wxDataObject* DataObj)
4510 {
4511     m_preDrag = false;
4512
4513     if ((def != wxDragCopy) && (def != wxDragMove))
4514     {
4515         return;
4516     }
4517
4518     if (!GetSelection().IsValid())
4519     {
4520         return;
4521     }
4522
4523     wxRichTextParagraphLayoutBox* originContainer = GetSelection().GetContainer();
4524     wxRichTextParagraphLayoutBox* destContainer = GetFocusObject(); // This will be the drop container, not necessarily the same as the origin one
4525
4526     wxRichTextBuffer* richTextBuffer = ((wxRichTextBufferDataObject*)DataObj)->GetRichTextBuffer();
4527     if (richTextBuffer)
4528     {
4529         long position = GetCaretPosition();
4530         wxRichTextRange selectionrange = GetInternalSelectionRange();
4531         if (selectionrange.Contains(position) && (def == wxDragMove))
4532         {
4533             // It doesn't make sense to move onto itself
4534             return;
4535         }
4536
4537         // If we're moving, and the data is being moved forward, we need to drop first, then delete the selection
4538         // If moving backwards, we need to delete then drop. If we're copying (or doing nothing) we don't delete anyway
4539         bool DeleteAfter = (def == wxDragMove) && (position > selectionrange.GetEnd());
4540         if ((def == wxDragMove) && !DeleteAfter)
4541         {
4542             // We can't use e.g. DeleteSelectedContent() as it uses the focus container
4543             originContainer->DeleteRangeWithUndo(selectionrange, this, &GetBuffer());
4544         }
4545
4546         destContainer->InsertParagraphsWithUndo(&GetBuffer(), position+1, *richTextBuffer, this, 0);
4547         ShowPosition(position + richTextBuffer->GetOwnRange().GetEnd());
4548
4549         delete richTextBuffer;
4550
4551         if (DeleteAfter)
4552         {
4553             // We can't use e.g. DeleteSelectedContent() as it uses the focus container
4554             originContainer->DeleteRangeWithUndo(selectionrange, this, &GetBuffer());
4555         }
4556
4557         SelectNone();
4558         Refresh();
4559     }
4560 }
4561 #endif // wxUSE_DRAG_AND_DROP
4562
4563
4564 #if wxUSE_DRAG_AND_DROP
4565 bool wxRichTextDropSource::GiveFeedback(wxDragResult WXUNUSED(effect))
4566 {
4567     wxCHECK_MSG(m_rtc, false, wxT("NULL m_rtc"));
4568
4569     long position = 0;
4570     int hit = 0;
4571     wxRichTextObject* hitObj = NULL;
4572     wxRichTextParagraphLayoutBox* container = m_rtc->FindContainerAtPoint(m_rtc->GetUnscaledPoint(m_rtc->ScreenToClient(wxGetMousePosition())), position, hit, hitObj);
4573
4574     if (!(hit & wxRICHTEXT_HITTEST_NONE) && container && container->AcceptsFocus())
4575     {
4576         m_rtc->StoreFocusObject(container);
4577         m_rtc->SetCaretPositionAfterClick(container, position, hit);
4578     }
4579
4580     return false;  // so that the base-class sets a cursor
4581 }
4582 #endif // wxUSE_DRAG_AND_DROP
4583
4584 bool wxRichTextCtrl::CanDeleteRange(wxRichTextParagraphLayoutBox& WXUNUSED(container), const wxRichTextRange& WXUNUSED(range)) const
4585 {
4586     return true;
4587 }
4588
4589 bool wxRichTextCtrl::CanInsertContent(wxRichTextParagraphLayoutBox& WXUNUSED(container), long WXUNUSED(pos)) const
4590 {
4591     return true;
4592 }
4593
4594 void wxRichTextCtrl::EnableVerticalScrollbar(bool enable)
4595 {
4596     m_verticalScrollbarEnabled = enable;
4597     SetupScrollbars();
4598 }
4599
4600 void wxRichTextCtrl::SetFontScale(double fontScale, bool refresh)
4601 {
4602     GetBuffer().SetFontScale(fontScale);
4603     if (refresh)
4604     {
4605         GetBuffer().Invalidate(wxRICHTEXT_ALL);
4606         Refresh();
4607     }
4608 }
4609
4610 void wxRichTextCtrl::SetDimensionScale(double dimScale, bool refresh)
4611 {
4612     GetBuffer().SetDimensionScale(dimScale);
4613     if (refresh)
4614     {
4615         GetBuffer().Invalidate(wxRICHTEXT_ALL);
4616         Refresh();
4617     }
4618 }
4619
4620 // Sets an overall scale factor for displaying and editing the content.
4621 void wxRichTextCtrl::SetScale(double scale, bool refresh)
4622 {
4623     m_scale = scale;
4624     if (refresh)
4625     {
4626         GetBuffer().Invalidate(wxRICHTEXT_ALL);
4627         Refresh();
4628     }
4629 }
4630
4631 // Get an unscaled point
4632 wxPoint wxRichTextCtrl::GetUnscaledPoint(const wxPoint& pt) const
4633 {
4634     if (GetScale() == 1.0)
4635         return pt;
4636     else
4637         return wxPoint((int) (0.5 + double(pt.x) / GetScale()), (int) (0.5 + double(pt.y) / GetScale()));
4638 }
4639
4640 // Get a scaled point
4641 wxPoint wxRichTextCtrl::GetScaledPoint(const wxPoint& pt) const
4642 {
4643     if (GetScale() == 1.0)
4644         return pt;
4645     else
4646         return wxPoint((int) (0.5 + double(pt.x) * GetScale()), (int) (0.5 + double(pt.y) * GetScale()));
4647 }
4648
4649 // Get an unscaled size
4650 wxSize wxRichTextCtrl::GetUnscaledSize(const wxSize& sz) const
4651 {
4652     if (GetScale() == 1.0)
4653         return sz;
4654     else
4655         return wxSize((int) (0.5 + double(sz.x) / GetScale()), (int) (0.5 + double(sz.y) / GetScale()));
4656 }
4657
4658 // Get a scaled size
4659 wxSize wxRichTextCtrl::GetScaledSize(const wxSize& sz) const
4660 {
4661     if (GetScale() == 1.0)
4662         return sz;
4663     else
4664         return wxSize((int) (0.5 + double(sz.x) * GetScale()), (int) (0.5 + double(sz.y) * GetScale()));
4665 }
4666
4667 // Get an unscaled rect
4668 wxRect wxRichTextCtrl::GetUnscaledRect(const wxRect& rect) const
4669 {
4670     if (GetScale() == 1.0)
4671         return rect;
4672     else
4673         return wxRect((int) (0.5 + double(rect.x) / GetScale()), (int) (0.5 + double(rect.y) / GetScale()),
4674                       (int) (0.5 + double(rect.width) / GetScale()), (int) (0.5 + double(rect.height) / GetScale()));
4675 }
4676
4677 // Get a scaled rect
4678 wxRect wxRichTextCtrl::GetScaledRect(const wxRect& rect) const
4679 {
4680     if (GetScale() == 1.0)
4681         return rect;
4682     else
4683         return wxRect((int) (0.5 + double(rect.x) * GetScale()), (int) (0.5 + double(rect.y) * GetScale()),
4684                       (int) (0.5 + double(rect.width) * GetScale()), (int) (0.5 + double(rect.height) * GetScale()));
4685 }
4686
4687 #if wxRICHTEXT_USE_OWN_CARET
4688
4689 // ----------------------------------------------------------------------------
4690 // initialization and destruction
4691 // ----------------------------------------------------------------------------
4692
4693 void wxRichTextCaret::Init()
4694 {
4695     m_hasFocus = true;
4696     m_refreshEnabled = true;
4697
4698     m_xOld =
4699     m_yOld = -1;
4700     m_richTextCtrl = NULL;
4701     m_needsUpdate = false;
4702     m_flashOn = true;
4703 }
4704
4705 wxRichTextCaret::~wxRichTextCaret()
4706 {
4707     if (m_timer.IsRunning())
4708         m_timer.Stop();
4709 }
4710
4711 // ----------------------------------------------------------------------------
4712 // showing/hiding/moving the caret (base class interface)
4713 // ----------------------------------------------------------------------------
4714
4715 void wxRichTextCaret::DoShow()
4716 {
4717     m_flashOn = true;
4718
4719     if (!m_timer.IsRunning())
4720         m_timer.Start(GetBlinkTime());
4721
4722     Refresh();
4723 }
4724
4725 void wxRichTextCaret::DoHide()
4726 {
4727     if (m_timer.IsRunning())
4728         m_timer.Stop();
4729
4730     Refresh();
4731 }
4732
4733 void wxRichTextCaret::DoMove()
4734 {
4735     if (IsVisible())
4736     {
4737         Refresh();
4738
4739         if (m_xOld != -1 && m_yOld != -1)
4740         {
4741             if (m_richTextCtrl && m_refreshEnabled)
4742             {
4743                 wxRect rect(GetPosition(), GetSize());
4744                 m_richTextCtrl->RefreshRect(rect, false);
4745             }
4746         }
4747     }
4748
4749     m_xOld = m_x;
4750     m_yOld = m_y;
4751 }
4752
4753 void wxRichTextCaret::DoSize()
4754 {
4755     int countVisible = m_countVisible;
4756     if (countVisible > 0)
4757     {
4758         m_countVisible = 0;
4759         DoHide();
4760     }
4761
4762     if (countVisible > 0)
4763     {
4764         m_countVisible = countVisible;
4765         DoShow();
4766     }
4767 }
4768
4769 // ----------------------------------------------------------------------------
4770 // handling the focus
4771 // ----------------------------------------------------------------------------
4772
4773 void wxRichTextCaret::OnSetFocus()
4774 {
4775     m_hasFocus = true;
4776
4777     if ( IsVisible() )
4778         Refresh();
4779 }
4780
4781 void wxRichTextCaret::OnKillFocus()
4782 {
4783     m_hasFocus = false;
4784 }
4785
4786 // ----------------------------------------------------------------------------
4787 // drawing the caret
4788 // ----------------------------------------------------------------------------
4789
4790 void wxRichTextCaret::Refresh()
4791 {
4792     if (m_richTextCtrl && m_refreshEnabled)
4793     {
4794         wxRect rect(GetPosition(), GetSize());
4795         m_richTextCtrl->RefreshRect(rect, false);
4796     }
4797 }
4798
4799 void wxRichTextCaret::DoDraw(wxDC *dc)
4800 {
4801     dc->SetPen( *wxBLACK_PEN );
4802
4803     dc->SetBrush(*(m_hasFocus ? wxBLACK_BRUSH : wxTRANSPARENT_BRUSH));
4804     dc->SetPen(*wxBLACK_PEN);
4805
4806     wxPoint pt(m_x, m_y);
4807
4808     if (m_richTextCtrl)
4809     {
4810         pt = m_richTextCtrl->GetLogicalPoint(pt);
4811     }
4812     if (IsVisible() && m_flashOn)
4813         dc->DrawRectangle(pt.x, pt.y, m_width, m_height);
4814 }
4815
4816 void wxRichTextCaret::Notify()
4817 {
4818     m_flashOn = !m_flashOn;
4819     Refresh();
4820 }
4821
4822 void wxRichTextCaretTimer::Notify()
4823 {
4824     m_caret->Notify();
4825 }
4826 #endif
4827     // wxRICHTEXT_USE_OWN_CARET
4828
4829 // Add an item
4830 bool wxRichTextContextMenuPropertiesInfo::AddItem(const wxString& label, wxRichTextObject* obj)
4831 {
4832     if (GetCount() < 3)
4833     {
4834         m_labels.Add(label);
4835         m_objects.Add(obj);
4836         return true;
4837     }
4838     else
4839         return false;
4840 }
4841
4842 // Returns number of menu items were added.
4843 int wxRichTextContextMenuPropertiesInfo::AddMenuItems(wxMenu* menu, int startCmd) const
4844 {
4845     wxMenuItem* item = menu->FindItem(startCmd);
4846     // If none of the standard properties identifiers are in the menu, add them if necessary.
4847     // If no items to add, just set the text to something generic
4848     if (GetCount() == 0)
4849     {
4850         if (item)
4851         {
4852             menu->SetLabel(startCmd, _("&Properties"));
4853
4854             // Delete the others if necessary
4855             int i;
4856             for (i = startCmd+1; i < startCmd+3; i++)
4857             {
4858                 if (menu->FindItem(i))
4859                 {
4860                     menu->Delete(i);
4861                 }
4862             }
4863         }
4864     }
4865     else
4866     {
4867         int i;
4868         int pos = -1;
4869         // Find the position of the first properties item
4870         for (i = 0; i < (int) menu->GetMenuItemCount(); i++)
4871         {
4872             wxMenuItem* item = menu->FindItemByPosition(i);
4873             if (item && item->GetId() == startCmd)
4874             {
4875                 pos = i;
4876                 break;
4877             }
4878         }
4879
4880         if (pos != -1)
4881         {
4882             int insertBefore = pos+1;
4883             for (i = startCmd; i < startCmd+GetCount(); i++)
4884             {
4885                 if (menu->FindItem(i))
4886                 {
4887                     menu->SetLabel(i, m_labels[i - startCmd]);
4888                 }
4889                 else
4890                 {
4891                     if (insertBefore >= (int) menu->GetMenuItemCount())
4892                         menu->Append(i, m_labels[i - startCmd]);
4893                     else
4894                         menu->Insert(insertBefore, i, m_labels[i - startCmd]);
4895                 }
4896                 insertBefore ++;
4897             }
4898
4899             // Delete any old items still left on the menu
4900             for (i = startCmd + GetCount(); i < startCmd+3; i++)
4901             {
4902                 if (menu->FindItem(i))
4903                 {
4904                     menu->Delete(i);
4905                 }
4906             }
4907         }
4908         else
4909         {
4910             // No existing property identifiers were found, so append to the end of the menu.
4911             menu->AppendSeparator();
4912             for (i = startCmd; i < startCmd+GetCount(); i++)
4913             {
4914                 menu->Append(i, m_labels[i - startCmd]);
4915             }
4916         }
4917     }
4918
4919     return GetCount();
4920 }
4921
4922 // Add appropriate menu items for the current container and clicked on object
4923 // (and container's parent, if appropriate).
4924 int wxRichTextContextMenuPropertiesInfo::AddItems(wxRichTextCtrl* ctrl, wxRichTextObject* container, wxRichTextObject* obj)
4925 {
4926     Clear();
4927     if (obj && ctrl->CanEditProperties(obj))
4928         AddItem(ctrl->GetPropertiesMenuLabel(obj), obj);
4929
4930     if (container && container != obj && ctrl->CanEditProperties(container) && m_labels.Index(ctrl->GetPropertiesMenuLabel(container)) == wxNOT_FOUND)
4931         AddItem(ctrl->GetPropertiesMenuLabel(container), container);
4932
4933     if (container && container->GetParent() && ctrl->CanEditProperties(container->GetParent()) && m_labels.Index(ctrl->GetPropertiesMenuLabel(container->GetParent())) == wxNOT_FOUND)
4934         AddItem(ctrl->GetPropertiesMenuLabel(container->GetParent()), container->GetParent());
4935
4936     return GetCount();
4937 }
4938
4939 #endif
4940     // wxUSE_RICHTEXT