src/richtext/richtextctrl.cpp

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