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/textfile.h"
  30 #include "wx/ffile.h"
  31 #include "wx/filename.h"
  32 #include "wx/dcbuffer.h"
  33 #include "wx/arrimpl.cpp"
  34 #include "wx/fontenum.h"
  35
  36 // DLL options compatibility check:
  37 #include "wx/app.h"
  38 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  39
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_CLICK)
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RETURN)
  45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CHARACTER)
  46 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_DELETE)
  47
  48 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING)
  49 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED)
  50 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING)
  51 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED)
  52
  53 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED)
  54 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED)
  55 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED)
  56 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED)
  57 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_BUFFER_RESET)
  58
  59 #if wxRICHTEXT_USE_OWN_CARET
  60
  61 /*!
  62  * wxRichTextCaret
  63  *
  64  * This implements a non-flashing cursor in case there
  65  * are platform-specific problems with the generic caret.
  66  * wxRICHTEXT_USE_OWN_CARET is set in richtextbuffer.h.
  67  */
  68
  69 class wxRichTextCaret: public wxCaret
  70 {
  71 public:
  72     // ctors
  73     // -----
  74         // default - use Create()
  75     wxRichTextCaret() { Init(); }
  76         // creates a block caret associated with the given window
  77     wxRichTextCaret(wxRichTextCtrl *window, int width, int height)
  78         : wxCaret(window, width, height) { Init(); m_richTextCtrl = window; }
  79     wxRichTextCaret(wxRichTextCtrl *window, const wxSize& size)
  80         : wxCaret(window, size) { Init(); m_richTextCtrl = window; }
  81
  82     virtual ~wxRichTextCaret();
  83
  84     // implementation
  85     // --------------
  86
  87     // called by wxWindow (not using the event tables)
  88     virtual void OnSetFocus();
  89     virtual void OnKillFocus();
  90
  91     // draw the caret on the given DC
  92     void DoDraw(wxDC *dc);
  93
  94     // get the visible count
  95     int GetVisibleCount() const { return m_countVisible; }
  96
  97     // delay repositioning
  98     bool GetNeedsUpdate() const { return m_needsUpdate; }
  99     void SetNeedsUpdate(bool needsUpdate = true ) { m_needsUpdate = needsUpdate; }
 100
 101 protected:
 102     virtual void DoShow();
 103     virtual void DoHide();
 104     virtual void DoMove();
 105     virtual void DoSize();
 106
 107     // refresh the caret
 108     void Refresh();
 109
 110 private:
 111     void Init();
 112
 113     int           m_xOld,
 114                   m_yOld;
 115     bool          m_hasFocus;       // true => our window has focus
 116     bool          m_needsUpdate;    // must be repositioned
 117
 118     wxRichTextCtrl* m_richTextCtrl;
 119 };
 120 #endif
 121
 122 IMPLEMENT_CLASS( wxRichTextCtrl, wxControl )
 123
 124 IMPLEMENT_CLASS( wxRichTextEvent, wxNotifyEvent )
 125
 126 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
 127     EVT_PAINT(wxRichTextCtrl::OnPaint)
 128     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
 129     EVT_IDLE(wxRichTextCtrl::OnIdle)
 130     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
 131     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
 132     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
 133     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
 134     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
 135     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
 136     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
 137     EVT_CHAR(wxRichTextCtrl::OnChar)
 138     EVT_SIZE(wxRichTextCtrl::OnSize)
 139     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
 140     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
 141     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
 142     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
 143     EVT_SYS_COLOUR_CHANGED(wxRichTextCtrl::OnSysColourChanged)
 144
 145     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
 146     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
 147
 148     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
 149     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
 150
 151     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
 152     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
 153
 154     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
 155     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
 156
 157     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
 158     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
 159
 160     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
 161     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
 162
 163     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
 164     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 165 END_EVENT_TABLE()
 166
 167 /*!
 168  * wxRichTextCtrl
 169  */
 170
 171 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 172
 173 wxRichTextCtrl::wxRichTextCtrl()
 174               : wxScrollHelper(this)
 175 {
 176     Init();
 177 }
 178
 179 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 180                                wxWindowID id,
 181                                const wxString& value,
 182                                const wxPoint& pos,
 183                                const wxSize& size,
 184                                long style,
 185                                const wxValidator& validator,
 186                                const wxString& name)
 187               : wxScrollHelper(this)
 188 {
 189     Init();
 190     Create(parent, id, value, pos, size, style, validator, name);
 191 }
 192
 193 /// Creation
 194 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 195                              const wxValidator& validator, const wxString& name)
 196 {
 197     if (!wxControl::Create(parent, id, pos, size,
 198                            style|wxFULL_REPAINT_ON_RESIZE,
 199                            validator, name))
 200         return false;
 201
 202     if (!GetFont().Ok())
 203     {
 204         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 205     }
 206
 207     if (style & wxTE_READONLY)
 208         SetEditable(false);
 209
 210     // The base attributes must all have default values
 211     wxTextAttr attributes;
 212     attributes.SetFont(GetFont());
 213     attributes.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
 214     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 215     attributes.SetLineSpacing(10);
 216     attributes.SetParagraphSpacingAfter(10);
 217     attributes.SetParagraphSpacingBefore(0);
 218     attributes.SetTextEffects(0);
 219     attributes.SetTextEffectFlags(wxTEXT_ATTR_EFFECT_STRIKETHROUGH|wxTEXT_ATTR_EFFECT_CAPITALS);
 220
 221     SetBasicStyle(attributes);
 222
 223     // The default attributes will be merged with base attributes, so
 224     // can be empty to begin with
 225     wxTextAttr defaultAttributes;
 226     SetDefaultStyle(defaultAttributes);
 227
 228     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 229     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 230
 231     GetBuffer().Reset();
 232     GetBuffer().SetRichTextCtrl(this);
 233
 234 #if wxRICHTEXT_USE_OWN_CARET
 235     SetCaret(new wxRichTextCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 236 #else
 237     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 238 #endif
 239
 240     // Tell the sizers to use the given or best size
 241     SetInitialSize(size);
 242
 243 #if wxRICHTEXT_BUFFERED_PAINTING
 244     // Create a buffer
 245     RecreateBuffer(size);
 246 #endif
 247
 248     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 249     m_urlCursor = wxCursor(wxCURSOR_HAND);
 250
 251     SetCursor(m_textCursor);
 252
 253     if (!value.IsEmpty())
 254         SetValue(value);
 255
 256     GetBuffer().AddEventHandler(this);
 257
 258     return true;
 259 }
 260
 261 wxRichTextCtrl::~wxRichTextCtrl()
 262 {
 263     GetBuffer().RemoveEventHandler(this);
 264
 265     delete m_contextMenu;
 266 }
 267
 268 /// Member initialisation
 269 void wxRichTextCtrl::Init()
 270 {
 271     m_contextMenu = NULL;
 272     m_caret = NULL;
 273     m_caretPosition = -1;
 274     m_selectionRange.SetRange(-2, -2);
 275     m_selectionAnchor = -2;
 276     m_editable = true;
 277     m_caretAtLineStart = false;
 278     m_dragging = false;
 279     m_fullLayoutRequired = false;
 280     m_fullLayoutTime = 0;
 281     m_fullLayoutSavedPosition = 0;
 282     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 283     m_caretPositionForDefaultStyle = -2;
 284 }
 285
 286 void wxRichTextCtrl::DoThaw()
 287 {
 288     if (GetBuffer().GetDirty())
 289         LayoutContent();
 290     else
 291         SetupScrollbars();
 292     Refresh(false);
 293 }
 294
 295 /// Clear all text
 296 void wxRichTextCtrl::Clear()
 297 {
 298     m_buffer.ResetAndClearCommands();
 299     m_buffer.SetDirty(true);
 300     m_caretPosition = -1;
 301     m_caretPositionForDefaultStyle = -2;
 302     m_caretAtLineStart = false;
 303     m_selectionRange.SetRange(-2, -2);
 304
 305     Scroll(0,0);
 306
 307     if (!IsFrozen())
 308     {
 309         LayoutContent();
 310         Refresh(false);
 311     }
 312
 313     wxTextCtrl::SendTextUpdatedEvent(this);
 314 }
 315
 316 /// Painting
 317 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 318 {
 319 #if !wxRICHTEXT_USE_OWN_CARET
 320     if (GetCaret() && !IsFrozen())
 321         GetCaret()->Hide();
 322 #endif
 323
 324     {
 325 #if wxRICHTEXT_BUFFERED_PAINTING
 326         wxBufferedPaintDC dc(this, m_bufferBitmap);
 327 #else
 328         wxPaintDC dc(this);
 329 #endif
 330
 331         if (IsFrozen())
 332             return;
 333
 334         PrepareDC(dc);
 335
 336         dc.SetFont(GetFont());
 337
 338         // Paint the background
 339         PaintBackground(dc);
 340
 341         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 342
 343         wxRect drawingArea(GetUpdateRegion().GetBox());
 344         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 345
 346         wxRect availableSpace(GetClientSize());
 347         if (GetBuffer().GetDirty())
 348         {
 349             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 350             GetBuffer().SetDirty(false);
 351             SetupScrollbars();
 352         }
 353
 354         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 355 #if wxRICHTEXT_USE_OWN_CARET
 356         if (GetCaret()->IsVisible())
 357         {
 358             ((wxRichTextCaret*) GetCaret())->DoDraw(& dc);
 359         }
 360 #endif
 361     }
 362
 363 #if !wxRICHTEXT_USE_OWN_CARET
 364     if (GetCaret())
 365         GetCaret()->Show();
 366     PositionCaret();
 367 #endif
 368 }
 369
 370 // Empty implementation, to prevent flicker
 371 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 372 {
 373 }
 374
 375 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 376 {
 377     if (GetCaret())
 378     {
 379 #if !wxRICHTEXT_USE_OWN_CARET
 380         PositionCaret();
 381 #endif
 382         GetCaret()->Show();
 383     }
 384
 385 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 386     // Work around dropouts when control is focused
 387     if (!IsFrozen())
 388     {
 389         Refresh(false);
 390     }
 391 #endif
 392 }
 393
 394 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 395 {
 396     if (GetCaret())
 397         GetCaret()->Hide();
 398
 399 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 400     // Work around dropouts when control is focused
 401     if (!IsFrozen())
 402     {
 403         Refresh(false);
 404     }
 405 #endif
 406 }
 407
 408 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 409 {
 410     m_dragging = false;
 411 }
 412
 413 /// Left-click
 414 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 415 {
 416     SetFocus();
 417
 418     wxClientDC dc(this);
 419     PrepareDC(dc);
 420     dc.SetFont(GetFont());
 421
 422     long position = 0;
 423     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 424
 425     if (hit != wxRICHTEXT_HITTEST_NONE)
 426     {
 427         m_dragStart = event.GetLogicalPosition(dc);
 428         m_dragging = true;
 429         CaptureMouse();
 430
 431         bool caretAtLineStart = false;
 432
 433         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 434         {
 435             // If we're at the start of a line (but not first in para)
 436             // then we should keep the caret showing at the start of the line
 437             // by showing the m_caretAtLineStart flag.
 438             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 439             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 440
 441             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 442                 caretAtLineStart = true;
 443             position --;
 444         }
 445
 446         long oldCaretPos = m_caretPosition;
 447
 448         MoveCaret(position, caretAtLineStart);
 449         SetDefaultStyleToCursorStyle();
 450
 451         if (event.ShiftDown())
 452         {
 453             if (m_selectionRange.GetStart() == -2)
 454                 ExtendSelection(oldCaretPos, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 455             else
 456                 ExtendSelection(m_caretPosition, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 457         }
 458         else
 459             SelectNone();
 460     }
 461
 462     event.Skip();
 463 }
 464
 465 /// Left-up
 466 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 467 {
 468     if (m_dragging)
 469     {
 470         m_dragging = false;
 471         if (GetCapture() == this)
 472             ReleaseMouse();
 473
 474         // See if we clicked on a URL
 475         wxClientDC dc(this);
 476         PrepareDC(dc);
 477         dc.SetFont(GetFont());
 478
 479         long position = 0;
 480         wxPoint logicalPt = event.GetLogicalPosition(dc);
 481         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 482
 483         if ((hit != wxRICHTEXT_HITTEST_NONE) && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 484         {
 485             wxRichTextEvent cmdEvent(
 486                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 487                 GetId());
 488             cmdEvent.SetEventObject(this);
 489             cmdEvent.SetPosition(m_caretPosition+1);
 490
 491             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 492             {
 493                 wxTextAttr attr;
 494                 if (GetStyle(position, attr))
 495                 {
 496                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 497                     {
 498                         wxString urlTarget = attr.GetURL();
 499                         if (!urlTarget.IsEmpty())
 500                         {
 501                             wxMouseEvent mouseEvent(event);
 502
 503                             long startPos = 0, endPos = 0;
 504                             wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 505                             if (obj)
 506                             {
 507                                 startPos = obj->GetRange().GetStart();
 508                                 endPos = obj->GetRange().GetEnd();
 509                             }
 510
 511                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 512                             InitCommandEvent(urlEvent);
 513
 514                             urlEvent.SetString(urlTarget);
 515
 516                             GetEventHandler()->ProcessEvent(urlEvent);
 517                         }
 518                     }
 519                 }
 520             }
 521         }
 522     }
 523 }
 524
 525 /// Left-click
 526 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 527 {
 528     wxClientDC dc(this);
 529     PrepareDC(dc);
 530     dc.SetFont(GetFont());
 531
 532     long position = 0;
 533     wxPoint logicalPt = event.GetLogicalPosition(dc);
 534     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 535
 536     // See if we need to change the cursor
 537
 538     {
 539         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 540         {
 541             wxTextAttr attr;
 542             if (GetStyle(position, attr))
 543             {
 544                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 545                 {
 546                     SetCursor(m_urlCursor);
 547                 }
 548                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 549                 {
 550                     SetCursor(m_textCursor);
 551                 }
 552             }
 553         }
 554         else
 555             SetCursor(m_textCursor);
 556     }
 557
 558     if (!event.Dragging())
 559     {
 560         event.Skip();
 561         return;
 562     }
 563
 564     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 565     {
 566         // TODO: test closeness
 567
 568         bool caretAtLineStart = false;
 569
 570         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 571         {
 572             // If we're at the start of a line (but not first in para)
 573             // then we should keep the caret showing at the start of the line
 574             // by showing the m_caretAtLineStart flag.
 575             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 576             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 577
 578             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 579                 caretAtLineStart = true;
 580             position --;
 581         }
 582
 583         if (m_caretPosition != position)
 584         {
 585             ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 586
 587             MoveCaret(position, caretAtLineStart);
 588             SetDefaultStyleToCursorStyle();
 589         }
 590     }
 591 }
 592
 593 /// Right-click
 594 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 595 {
 596     SetFocus();
 597
 598     wxRichTextEvent cmdEvent(
 599         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 600         GetId());
 601     cmdEvent.SetEventObject(this);
 602     cmdEvent.SetPosition(m_caretPosition+1);
 603
 604     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 605         event.Skip();
 606 }
 607
 608 /// Left-double-click
 609 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 610 {
 611     wxRichTextEvent cmdEvent(
 612         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
 613         GetId());
 614     cmdEvent.SetEventObject(this);
 615     cmdEvent.SetPosition(m_caretPosition+1);
 616
 617     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 618     {
 619         SelectWord(GetCaretPosition()+1);
 620     }
 621 }
 622
 623 /// Middle-click
 624 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 625 {
 626     wxRichTextEvent cmdEvent(
 627         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
 628         GetId());
 629     cmdEvent.SetEventObject(this);
 630     cmdEvent.SetPosition(m_caretPosition+1);
 631
 632     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 633         event.Skip();
 634 }
 635
 636 /// Key press
 637 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 638 {
 639     int flags = 0;
 640     if (event.CmdDown())
 641         flags |= wxRICHTEXT_CTRL_DOWN;
 642     if (event.ShiftDown())
 643         flags |= wxRICHTEXT_SHIFT_DOWN;
 644     if (event.AltDown())
 645         flags |= wxRICHTEXT_ALT_DOWN;
 646
 647     if (event.GetKeyCode() == WXK_LEFT ||
 648         event.GetKeyCode() == WXK_RIGHT ||
 649         event.GetKeyCode() == WXK_UP ||
 650         event.GetKeyCode() == WXK_DOWN ||
 651         event.GetKeyCode() == WXK_HOME ||
 652         event.GetKeyCode() == WXK_PAGEUP ||
 653         event.GetKeyCode() == WXK_PAGEDOWN ||
 654         event.GetKeyCode() == WXK_END ||
 655
 656         event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 657         event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 658         event.GetKeyCode() == WXK_NUMPAD_UP ||
 659         event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 660         event.GetKeyCode() == WXK_NUMPAD_HOME ||
 661         event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 662         event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 663         event.GetKeyCode() == WXK_NUMPAD_END)
 664     {
 665         KeyboardNavigate(event.GetKeyCode(), flags);
 666         return;
 667     }
 668
 669     // all the other keys modify the controls contents which shouldn't be
 670     // possible if we're read-only
 671     if ( !IsEditable() )
 672     {
 673         event.Skip();
 674         return;
 675     }
 676
 677     if (event.GetKeyCode() == WXK_RETURN)
 678     {
 679         BeginBatchUndo(_("Insert Text"));
 680
 681         long newPos = m_caretPosition;
 682
 683         DeleteSelectedContent(& newPos);
 684
 685         if (event.ShiftDown())
 686         {
 687             wxString text;
 688             text = wxRichTextLineBreakChar;
 689             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 690         }
 691         else
 692             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE|wxRICHTEXT_INSERT_INTERACTIVE);
 693
 694         EndBatchUndo();
 695         SetDefaultStyleToCursorStyle();
 696
 697         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 698
 699         wxRichTextEvent cmdEvent(
 700             wxEVT_COMMAND_RICHTEXT_RETURN,
 701             GetId());
 702         cmdEvent.SetEventObject(this);
 703         cmdEvent.SetFlags(flags);
 704         cmdEvent.SetPosition(newPos+1);
 705
 706         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 707         {
 708             // Generate conventional event
 709             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 710             InitCommandEvent(textEvent);
 711
 712             GetEventHandler()->ProcessEvent(textEvent);
 713         }
 714         Update();
 715     }
 716     else if (event.GetKeyCode() == WXK_BACK)
 717     {
 718         BeginBatchUndo(_("Delete Text"));
 719
 720         // Submit range in character positions, which are greater than caret positions,
 721         // so subtract 1 for deleted character and add 1 for conversion to character position.
 722         if (m_caretPosition > -1 && !HasSelection())
 723         {
 724             bool processed = false;
 725             if (event.CmdDown())
 726             {
 727                 long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 728                 if (pos != -1 && (pos < m_caretPosition))
 729                 {
 730                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, m_caretPosition), this);
 731                     processed = true;
 732                 }
 733             }
 734
 735             if (!processed)
 736                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition, m_caretPosition), this);
 737         }
 738         else
 739             DeleteSelectedContent();
 740
 741         EndBatchUndo();
 742
 743         if (GetLastPosition() == -1)
 744         {
 745             GetBuffer().Reset();
 746
 747             m_caretPosition = -1;
 748             PositionCaret();
 749             SetDefaultStyleToCursorStyle();
 750         }
 751
 752         ScrollIntoView(m_caretPosition, WXK_LEFT);
 753
 754         wxRichTextEvent cmdEvent(
 755             wxEVT_COMMAND_RICHTEXT_DELETE,
 756             GetId());
 757         cmdEvent.SetEventObject(this);
 758         cmdEvent.SetFlags(flags);
 759         cmdEvent.SetPosition(m_caretPosition+1);
 760         GetEventHandler()->ProcessEvent(cmdEvent);
 761
 762         Update();
 763     }
 764     else if (event.GetKeyCode() == WXK_DELETE)
 765     {
 766         BeginBatchUndo(_("Delete Text"));
 767
 768         // Submit range in character positions, which are greater than caret positions,
 769         if (m_caretPosition < GetBuffer().GetRange().GetEnd()+1 && !HasSelection())
 770         {
 771             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition+1, m_caretPosition+1), this);
 772         }
 773         else
 774             DeleteSelectedContent();
 775
 776         EndBatchUndo();
 777
 778         if (GetLastPosition() == -1)
 779         {
 780             GetBuffer().Reset();
 781
 782             m_caretPosition = -1;
 783             PositionCaret();
 784             SetDefaultStyleToCursorStyle();
 785         }
 786
 787         wxRichTextEvent cmdEvent(
 788             wxEVT_COMMAND_RICHTEXT_DELETE,
 789             GetId());
 790         cmdEvent.SetEventObject(this);
 791         cmdEvent.SetFlags(flags);
 792         cmdEvent.SetPosition(m_caretPosition+1);
 793         GetEventHandler()->ProcessEvent(cmdEvent);
 794
 795         Update();
 796     }
 797     else
 798     {
 799         long keycode = event.GetKeyCode();
 800         switch ( keycode )
 801         {
 802             case WXK_ESCAPE:
 803             case WXK_DELETE:
 804             case WXK_START:
 805             case WXK_LBUTTON:
 806             case WXK_RBUTTON:
 807             case WXK_CANCEL:
 808             case WXK_MBUTTON:
 809             case WXK_CLEAR:
 810             case WXK_SHIFT:
 811             case WXK_ALT:
 812             case WXK_CONTROL:
 813             case WXK_MENU:
 814             case WXK_PAUSE:
 815             case WXK_CAPITAL:
 816             case WXK_END:
 817             case WXK_HOME:
 818             case WXK_LEFT:
 819             case WXK_UP:
 820             case WXK_RIGHT:
 821             case WXK_DOWN:
 822             case WXK_SELECT:
 823             case WXK_PRINT:
 824             case WXK_EXECUTE:
 825             case WXK_SNAPSHOT:
 826             case WXK_INSERT:
 827             case WXK_HELP:
 828             case WXK_NUMPAD0:
 829             case WXK_NUMPAD1:
 830             case WXK_NUMPAD2:
 831             case WXK_NUMPAD3:
 832             case WXK_NUMPAD4:
 833             case WXK_NUMPAD5:
 834             case WXK_NUMPAD6:
 835             case WXK_NUMPAD7:
 836             case WXK_NUMPAD8:
 837             case WXK_NUMPAD9:
 838             case WXK_MULTIPLY:
 839             case WXK_ADD:
 840             case WXK_SEPARATOR:
 841             case WXK_SUBTRACT:
 842             case WXK_DECIMAL:
 843             case WXK_DIVIDE:
 844             case WXK_F1:
 845             case WXK_F2:
 846             case WXK_F3:
 847             case WXK_F4:
 848             case WXK_F5:
 849             case WXK_F6:
 850             case WXK_F7:
 851             case WXK_F8:
 852             case WXK_F9:
 853             case WXK_F10:
 854             case WXK_F11:
 855             case WXK_F12:
 856             case WXK_F13:
 857             case WXK_F14:
 858             case WXK_F15:
 859             case WXK_F16:
 860             case WXK_F17:
 861             case WXK_F18:
 862             case WXK_F19:
 863             case WXK_F20:
 864             case WXK_F21:
 865             case WXK_F22:
 866             case WXK_F23:
 867             case WXK_F24:
 868             case WXK_NUMLOCK:
 869             case WXK_SCROLL:
 870             case WXK_PAGEUP:
 871             case WXK_PAGEDOWN:
 872             case WXK_NUMPAD_SPACE:
 873             case WXK_NUMPAD_TAB:
 874             case WXK_NUMPAD_ENTER:
 875             case WXK_NUMPAD_F1:
 876             case WXK_NUMPAD_F2:
 877             case WXK_NUMPAD_F3:
 878             case WXK_NUMPAD_F4:
 879             case WXK_NUMPAD_HOME:
 880             case WXK_NUMPAD_LEFT:
 881             case WXK_NUMPAD_UP:
 882             case WXK_NUMPAD_RIGHT:
 883             case WXK_NUMPAD_DOWN:
 884             case WXK_NUMPAD_PAGEUP:
 885             case WXK_NUMPAD_PAGEDOWN:
 886             case WXK_NUMPAD_END:
 887             case WXK_NUMPAD_BEGIN:
 888             case WXK_NUMPAD_INSERT:
 889             case WXK_NUMPAD_DELETE:
 890             case WXK_NUMPAD_EQUAL:
 891             case WXK_NUMPAD_MULTIPLY:
 892             case WXK_NUMPAD_ADD:
 893             case WXK_NUMPAD_SEPARATOR:
 894             case WXK_NUMPAD_SUBTRACT:
 895             case WXK_NUMPAD_DECIMAL:
 896             case WXK_WINDOWS_LEFT:
 897             {
 898                 event.Skip();
 899                 return;
 900             }
 901
 902             default:
 903             {
 904                 if (event.CmdDown() || event.AltDown())
 905                 {
 906                     event.Skip();
 907                     return;
 908                 }
 909
 910                 wxRichTextEvent cmdEvent(
 911                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
 912                     GetId());
 913                 cmdEvent.SetEventObject(this);
 914                 cmdEvent.SetFlags(flags);
 915 #if wxUSE_UNICODE
 916                 cmdEvent.SetCharacter(event.GetUnicodeKey());
 917 #else
 918                 cmdEvent.SetCharacter((wxChar) keycode);
 919 #endif
 920                 cmdEvent.SetPosition(m_caretPosition+1);
 921
 922                 if (keycode == wxT('\t'))
 923                 {
 924                     // See if we need to promote or demote the selection or paragraph at the cursor
 925                     // position, instead of inserting a tab.
 926                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
 927                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
 928                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
 929                     {
 930                         wxRichTextRange range;
 931                         if (HasSelection())
 932                             range = GetSelectionRange();
 933                         else
 934                             range = para->GetRange().FromInternal();
 935
 936                         int promoteBy = event.ShiftDown() ? 1 : -1;
 937
 938                         PromoteList(promoteBy, range, NULL);
 939
 940                         GetEventHandler()->ProcessEvent(cmdEvent);
 941
 942                         return;
 943                     }
 944                 }
 945
 946                 BeginBatchUndo(_("Insert Text"));
 947
 948                 long newPos = m_caretPosition;
 949                 DeleteSelectedContent(& newPos);
 950
 951 #if wxUSE_UNICODE
 952                 wxString str = event.GetUnicodeKey();
 953 #else
 954                 wxString str = (wxChar) event.GetKeyCode();
 955 #endif
 956                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
 957
 958                 EndBatchUndo();
 959
 960                 SetDefaultStyleToCursorStyle();
 961                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
 962
 963                 GetEventHandler()->ProcessEvent(cmdEvent);
 964
 965                 Update();
 966             }
 967         }
 968     }
 969 }
 970
 971 /// Delete content if there is a selection, e.g. when pressing a key.
 972 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
 973 {
 974     if (HasSelection())
 975     {
 976         long pos = m_selectionRange.GetStart();
 977         GetBuffer().DeleteRangeWithUndo(m_selectionRange, this);
 978         m_selectionRange.SetRange(-2, -2);
 979
 980         if (newPos)
 981             *newPos = pos-1;
 982         return true;
 983     }
 984     else
 985         return false;
 986 }
 987
 988 /// Keyboard navigation
 989
 990 /*
 991
 992 Left:       left one character
 993 Right:      right one character
 994 Up:         up one line
 995 Down:       down one line
 996 Ctrl-Left:  left one word
 997 Ctrl-Right: right one word
 998 Ctrl-Up:    previous paragraph start
 999 Ctrl-Down:  next start of paragraph
1000 Home:       start of line
1001 End:        end of line
1002 Ctrl-Home:  start of document
1003 Ctrl-End:   end of document
1004 Page-Up:    Up a screen
1005 Page-Down:  Down a screen
1006
1007 Maybe:
1008
1009 Ctrl-Alt-PgUp: Start of window
1010 Ctrl-Alt-PgDn: End of window
1011 F8:         Start selection mode
1012 Esc:        End selection mode
1013
1014 Adding Shift does the above but starts/extends selection.
1015
1016
1017  */
1018
1019 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
1020 {
1021     bool success = false;
1022
1023     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
1024     {
1025         if (flags & wxRICHTEXT_CTRL_DOWN)
1026             success = WordRight(1, flags);
1027         else
1028             success = MoveRight(1, flags);
1029     }
1030     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
1031     {
1032         if (flags & wxRICHTEXT_CTRL_DOWN)
1033             success = WordLeft(1, flags);
1034         else
1035             success = MoveLeft(1, flags);
1036     }
1037     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
1038     {
1039         if (flags & wxRICHTEXT_CTRL_DOWN)
1040             success = MoveToParagraphStart(flags);
1041         else
1042             success = MoveUp(1, flags);
1043     }
1044     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
1045     {
1046         if (flags & wxRICHTEXT_CTRL_DOWN)
1047             success = MoveToParagraphEnd(flags);
1048         else
1049             success = MoveDown(1, flags);
1050     }
1051     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
1052     {
1053         success = PageUp(1, flags);
1054     }
1055     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1056     {
1057         success = PageDown(1, flags);
1058     }
1059     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
1060     {
1061         if (flags & wxRICHTEXT_CTRL_DOWN)
1062             success = MoveHome(flags);
1063         else
1064             success = MoveToLineStart(flags);
1065     }
1066     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
1067     {
1068         if (flags & wxRICHTEXT_CTRL_DOWN)
1069             success = MoveEnd(flags);
1070         else
1071             success = MoveToLineEnd(flags);
1072     }
1073
1074     if (success)
1075     {
1076         ScrollIntoView(m_caretPosition, keyCode);
1077         SetDefaultStyleToCursorStyle();
1078     }
1079
1080     return success;
1081 }
1082
1083 /// Extend the selection. Selections are in caret positions.
1084 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
1085 {
1086     if (flags & wxRICHTEXT_SHIFT_DOWN)
1087     {
1088         wxRichTextRange oldSelection = m_selectionRange;
1089
1090         // If not currently selecting, start selecting
1091         if (m_selectionRange.GetStart() == -2)
1092         {
1093             m_selectionAnchor = oldPos;
1094
1095             if (oldPos > newPos)
1096                 m_selectionRange.SetRange(newPos+1, oldPos);
1097             else
1098                 m_selectionRange.SetRange(oldPos+1, newPos);
1099         }
1100         else
1101         {
1102             // Always ensure that the selection range start is greater than
1103             // the end.
1104             if (newPos > m_selectionAnchor)
1105                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
1106             else
1107                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
1108         }
1109
1110         RefreshForSelectionChange(oldSelection, m_selectionRange);
1111
1112         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
1113         {
1114             wxLogDebug(wxT("Strange selection range"));
1115         }
1116
1117         return true;
1118     }
1119     else
1120         return false;
1121 }
1122
1123 /// Scroll into view, returning true if we scrolled.
1124 /// This takes a _caret_ position.
1125 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1126 {
1127     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1128
1129     if (!line)
1130         return false;
1131
1132     int ppuX, ppuY;
1133     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1134
1135     int startXUnits, startYUnits;
1136     GetViewStart(& startXUnits, & startYUnits);
1137     int startY = startYUnits * ppuY;
1138
1139     int sx = 0, sy = 0;
1140     GetVirtualSize(& sx, & sy);
1141     int sxUnits = 0;
1142     int syUnits = 0;
1143     if (ppuY != 0)
1144         syUnits = sy/ppuY;
1145
1146     wxRect rect = line->GetRect();
1147
1148     bool scrolled = false;
1149
1150     wxSize clientSize = GetClientSize();
1151
1152     // Going down
1153     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1154         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1155         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1156         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1157     {
1158         if ((rect.y + rect.height) > (clientSize.y + startY))
1159         {
1160             // Make it scroll so this item is at the bottom
1161             // of the window
1162             int y = rect.y - (clientSize.y - rect.height);
1163             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1164
1165             // If we're still off the screen, scroll another line down
1166             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1167                 yUnits ++;
1168
1169             if (startYUnits != yUnits)
1170             {
1171                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1172                 scrolled = true;
1173             }
1174         }
1175         else if (rect.y < startY)
1176         {
1177             // Make it scroll so this item is at the top
1178             // of the window
1179             int y = rect.y ;
1180             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1181
1182             if (startYUnits != yUnits)
1183             {
1184                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1185                 scrolled = true;
1186             }
1187         }
1188     }
1189     // Going up
1190     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1191              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1192              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1193              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1194     {
1195         if (rect.y < startY)
1196         {
1197             // Make it scroll so this item is at the top
1198             // of the window
1199             int y = rect.y ;
1200             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1201
1202             if (startYUnits != yUnits)
1203             {
1204                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1205                 scrolled = true;
1206             }
1207         }
1208         else if ((rect.y + rect.height) > (clientSize.y + startY))
1209         {
1210             // Make it scroll so this item is at the bottom
1211             // of the window
1212             int y = rect.y - (clientSize.y - rect.height);
1213             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1214
1215             // If we're still off the screen, scroll another line down
1216             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1217                 yUnits ++;
1218
1219             if (startYUnits != yUnits)
1220             {
1221                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1222                 scrolled = true;
1223             }
1224         }
1225     }
1226
1227 #if !wxRICHTEXT_USE_OWN_CARET
1228     if (scrolled)
1229 #endif
1230         PositionCaret();
1231
1232     return scrolled;
1233 }
1234
1235 /// Is the given position visible on the screen?
1236 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1237 {
1238     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1239
1240     if (!line)
1241         return false;
1242
1243     int ppuX, ppuY;
1244     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1245
1246     int startX, startY;
1247     GetViewStart(& startX, & startY);
1248     startX = 0;
1249     startY = startY * ppuY;
1250
1251     wxRect rect = line->GetRect();
1252     wxSize clientSize = GetClientSize();
1253
1254     return (rect.GetBottom() > startY) && (rect.GetTop() < (startY + clientSize.y));
1255 }
1256
1257 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1258 {
1259     m_caretPosition = position;
1260     m_caretAtLineStart = showAtLineStart;
1261 }
1262
1263 /// Move caret one visual step forward: this may mean setting a flag
1264 /// and keeping the same position if we're going from the end of one line
1265 /// to the start of the next, which may be the exact same caret position.
1266 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1267 {
1268     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1269
1270     // Only do the check if we're not at the end of the paragraph (where things work OK
1271     // anyway)
1272     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1273     {
1274         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1275
1276         if (line)
1277         {
1278             wxRichTextRange lineRange = line->GetAbsoluteRange();
1279
1280             // We're at the end of a line. See whether we need to
1281             // stay at the same actual caret position but change visual
1282             // position, or not.
1283             if (oldPosition == lineRange.GetEnd())
1284             {
1285                 if (m_caretAtLineStart)
1286                 {
1287                     // We're already at the start of the line, so actually move on now.
1288                     m_caretPosition = oldPosition + 1;
1289                     m_caretAtLineStart = false;
1290                 }
1291                 else
1292                 {
1293                     // We're showing at the end of the line, so keep to
1294                     // the same position but indicate that we're to show
1295                     // at the start of the next line.
1296                     m_caretPosition = oldPosition;
1297                     m_caretAtLineStart = true;
1298                 }
1299                 SetDefaultStyleToCursorStyle();
1300                 return;
1301             }
1302         }
1303     }
1304     m_caretPosition ++;
1305     SetDefaultStyleToCursorStyle();
1306 }
1307
1308 /// Move caret one visual step backward: this may mean setting a flag
1309 /// and keeping the same position if we're going from the end of one line
1310 /// to the start of the next, which may be the exact same caret position.
1311 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1312 {
1313     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1314
1315     // Only do the check if we're not at the start of the paragraph (where things work OK
1316     // anyway)
1317     if (para && (oldPosition != para->GetRange().GetStart()))
1318     {
1319         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1320
1321         if (line)
1322         {
1323             wxRichTextRange lineRange = line->GetAbsoluteRange();
1324
1325             // We're at the start of a line. See whether we need to
1326             // stay at the same actual caret position but change visual
1327             // position, or not.
1328             if (oldPosition == lineRange.GetStart())
1329             {
1330                 m_caretPosition = oldPosition-1;
1331                 m_caretAtLineStart = true;
1332                 return;
1333             }
1334             else if (oldPosition == lineRange.GetEnd())
1335             {
1336                 if (m_caretAtLineStart)
1337                 {
1338                     // We're at the start of the line, so keep the same caret position
1339                     // but clear the start-of-line flag.
1340                     m_caretPosition = oldPosition;
1341                     m_caretAtLineStart = false;
1342                 }
1343                 else
1344                 {
1345                     // We're showing at the end of the line, so go back
1346                     // to the previous character position.
1347                     m_caretPosition = oldPosition - 1;
1348                 }
1349                 SetDefaultStyleToCursorStyle();
1350                 return;
1351             }
1352         }
1353     }
1354     m_caretPosition --;
1355     SetDefaultStyleToCursorStyle();
1356 }
1357
1358 /// Move right
1359 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1360 {
1361     long endPos = GetBuffer().GetRange().GetEnd();
1362
1363     if (m_caretPosition + noPositions < endPos)
1364     {
1365         long oldPos = m_caretPosition;
1366         long newPos = m_caretPosition + noPositions;
1367
1368         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1369         if (!extendSel)
1370             SelectNone();
1371
1372         // Determine by looking at oldPos and m_caretPosition whether
1373         // we moved from the end of a line to the start of the next line, in which case
1374         // we want to adjust the caret position such that it is positioned at the
1375         // start of the next line, rather than jumping past the first character of the
1376         // line.
1377         if (noPositions == 1 && !extendSel)
1378             MoveCaretForward(oldPos);
1379         else
1380             SetCaretPosition(newPos);
1381
1382         PositionCaret();
1383         SetDefaultStyleToCursorStyle();
1384
1385         return true;
1386     }
1387     else
1388         return false;
1389 }
1390
1391 /// Move left
1392 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1393 {
1394     long startPos = -1;
1395
1396     if (m_caretPosition > startPos - noPositions + 1)
1397     {
1398         long oldPos = m_caretPosition;
1399         long newPos = m_caretPosition - noPositions;
1400         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1401         if (!extendSel)
1402             SelectNone();
1403
1404         if (noPositions == 1 && !extendSel)
1405             MoveCaretBack(oldPos);
1406         else
1407             SetCaretPosition(newPos);
1408
1409         PositionCaret();
1410         SetDefaultStyleToCursorStyle();
1411
1412         return true;
1413     }
1414     else
1415         return false;
1416 }
1417
1418 /// Move up
1419 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1420 {
1421     return MoveDown(- noLines, flags);
1422 }
1423
1424 /// Move up
1425 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1426 {
1427     if (!GetCaret())
1428         return false;
1429
1430     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1431     wxPoint pt = GetCaret()->GetPosition();
1432     long newLine = lineNumber + noLines;
1433
1434     if (lineNumber != -1)
1435     {
1436         if (noLines > 0)
1437         {
1438             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1439
1440             if (newLine > lastLine)
1441                 return false;
1442         }
1443         else
1444         {
1445             if (newLine < 0)
1446                 return false;
1447         }
1448     }
1449
1450     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1451     if (lineObj)
1452     {
1453         pt.y = lineObj->GetAbsolutePosition().y + 2;
1454     }
1455     else
1456         return false;
1457
1458     long newPos = 0;
1459     wxClientDC dc(this);
1460     PrepareDC(dc);
1461     dc.SetFont(GetFont());
1462
1463     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1464
1465     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1466     {
1467         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1468         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1469         // so we view the caret at the start of the line.
1470         bool caretLineStart = false;
1471         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1472         {
1473             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1474             wxRichTextRange lineRange;
1475             if (thisLine)
1476                 lineRange = thisLine->GetAbsoluteRange();
1477
1478             if (thisLine && (newPos-1) == lineRange.GetEnd())
1479             {
1480                 newPos --;
1481                 caretLineStart = true;
1482             }
1483             else
1484             {
1485                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1486                 if (para && para->GetRange().GetStart() == newPos)
1487                     newPos --;
1488             }
1489         }
1490
1491         long newSelEnd = newPos;
1492
1493         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1494         if (!extendSel)
1495             SelectNone();
1496
1497         SetCaretPosition(newPos, caretLineStart);
1498         PositionCaret();
1499         SetDefaultStyleToCursorStyle();
1500
1501         return true;
1502     }
1503
1504     return false;
1505 }
1506
1507 /// Move to the end of the paragraph
1508 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1509 {
1510     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1511     if (para)
1512     {
1513         long newPos = para->GetRange().GetEnd() - 1;
1514         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1515         if (!extendSel)
1516             SelectNone();
1517
1518         SetCaretPosition(newPos);
1519         PositionCaret();
1520         SetDefaultStyleToCursorStyle();
1521
1522         return true;
1523     }
1524
1525     return false;
1526 }
1527
1528 /// Move to the start of the paragraph
1529 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1530 {
1531     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1532     if (para)
1533     {
1534         long newPos = para->GetRange().GetStart() - 1;
1535         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1536         if (!extendSel)
1537             SelectNone();
1538
1539         SetCaretPosition(newPos);
1540         PositionCaret();
1541         SetDefaultStyleToCursorStyle();
1542
1543         return true;
1544     }
1545
1546     return false;
1547 }
1548
1549 /// Move to the end of the line
1550 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1551 {
1552     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1553
1554     if (line)
1555     {
1556         wxRichTextRange lineRange = line->GetAbsoluteRange();
1557         long newPos = lineRange.GetEnd();
1558         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1559         if (!extendSel)
1560             SelectNone();
1561
1562         SetCaretPosition(newPos);
1563         PositionCaret();
1564         SetDefaultStyleToCursorStyle();
1565
1566         return true;
1567     }
1568
1569     return false;
1570 }
1571
1572 /// Move to the start of the line
1573 bool wxRichTextCtrl::MoveToLineStart(int flags)
1574 {
1575     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1576     if (line)
1577     {
1578         wxRichTextRange lineRange = line->GetAbsoluteRange();
1579         long newPos = lineRange.GetStart()-1;
1580
1581         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1582         if (!extendSel)
1583             SelectNone();
1584
1585         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1586
1587         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1588         PositionCaret();
1589         SetDefaultStyleToCursorStyle();
1590
1591         return true;
1592     }
1593
1594     return false;
1595 }
1596
1597 /// Move to the start of the buffer
1598 bool wxRichTextCtrl::MoveHome(int flags)
1599 {
1600     if (m_caretPosition != -1)
1601     {
1602         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1603         if (!extendSel)
1604             SelectNone();
1605
1606         SetCaretPosition(-1);
1607         PositionCaret();
1608         SetDefaultStyleToCursorStyle();
1609
1610         return true;
1611     }
1612     else
1613         return false;
1614 }
1615
1616 /// Move to the end of the buffer
1617 bool wxRichTextCtrl::MoveEnd(int flags)
1618 {
1619     long endPos = GetBuffer().GetRange().GetEnd()-1;
1620
1621     if (m_caretPosition != endPos)
1622     {
1623         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1624         if (!extendSel)
1625             SelectNone();
1626
1627         SetCaretPosition(endPos);
1628         PositionCaret();
1629         SetDefaultStyleToCursorStyle();
1630
1631         return true;
1632     }
1633     else
1634         return false;
1635 }
1636
1637 /// Move noPages pages up
1638 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1639 {
1640     return PageDown(- noPages, flags);
1641 }
1642
1643 /// Move noPages pages down
1644 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1645 {
1646     // Calculate which line occurs noPages * screen height further down.
1647     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1648     if (line)
1649     {
1650         wxSize clientSize = GetClientSize();
1651         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1652
1653         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1654         if (newLine)
1655         {
1656             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1657             long pos = lineRange.GetStart()-1;
1658             if (pos != m_caretPosition)
1659             {
1660                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1661
1662                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1663                 if (!extendSel)
1664                     SelectNone();
1665
1666                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1667                 PositionCaret();
1668                 SetDefaultStyleToCursorStyle();
1669
1670                 return true;
1671             }
1672         }
1673     }
1674
1675     return false;
1676 }
1677
1678 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1679 {
1680     return str == wxT(" ") || str == wxT("\t");
1681 }
1682
1683 // Finds the caret position for the next word
1684 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1685 {
1686     long endPos = GetBuffer().GetRange().GetEnd();
1687
1688     if (direction > 0)
1689     {
1690         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1691
1692         // First skip current text to space
1693         while (i < endPos && i > -1)
1694         {
1695             // i is in character, not caret positions
1696             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1697             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1698             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1699             {
1700                 break;
1701             }
1702             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1703                 i += direction;
1704             else
1705             {
1706                 break;
1707             }
1708         }
1709         while (i < endPos && i > -1)
1710         {
1711             // i is in character, not caret positions
1712             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1713             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1714             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1715                 return wxMax(-1, i);
1716
1717             if (text.empty()) // End of paragraph, or maybe an image
1718                 return wxMax(-1, i - 1);
1719             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1720                 i += direction;
1721             else
1722             {
1723                 // Convert to caret position
1724                 return wxMax(-1, i - 1);
1725             }
1726         }
1727         if (i >= endPos)
1728             return endPos-1;
1729         return i-1;
1730     }
1731     else
1732     {
1733         long i = m_caretPosition;
1734
1735         // First skip white space
1736         while (i < endPos && i > -1)
1737         {
1738             // i is in character, not caret positions
1739             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1740             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1741
1742             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1743                 break;
1744             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1745                 i += direction;
1746             else
1747                 break;
1748         }
1749         // Next skip current text to space
1750         while (i < endPos && i > -1)
1751         {
1752             // i is in character, not caret positions
1753             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1754             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1755             if (line && line->GetAbsoluteRange().GetStart() == i)
1756                 return i-1;
1757
1758             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1759                 i += direction;
1760             else
1761             {
1762                 return i;
1763             }
1764         }
1765         if (i < -1)
1766             return -1;
1767         return i;
1768     }
1769 }
1770
1771 /// Move n words left
1772 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1773 {
1774     long pos = FindNextWordPosition(-1);
1775     if (pos != m_caretPosition)
1776     {
1777         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1778
1779         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1780         if (!extendSel)
1781             SelectNone();
1782
1783         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1784         PositionCaret();
1785         SetDefaultStyleToCursorStyle();
1786
1787         return true;
1788     }
1789
1790     return false;
1791 }
1792
1793 /// Move n words right
1794 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1795 {
1796     long pos = FindNextWordPosition(1);
1797     if (pos != m_caretPosition)
1798     {
1799         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1800
1801         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1802         if (!extendSel)
1803             SelectNone();
1804
1805         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1806         PositionCaret();
1807         SetDefaultStyleToCursorStyle();
1808
1809         return true;
1810     }
1811
1812     return false;
1813 }
1814
1815 /// Sizing
1816 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1817 {
1818     // Only do sizing optimization for large buffers
1819     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1820     {
1821         m_fullLayoutRequired = true;
1822         m_fullLayoutTime = wxGetLocalTimeMillis();
1823         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1824         LayoutContent(true /* onlyVisibleRect */);
1825     }
1826     else
1827         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1828
1829 #if wxRICHTEXT_BUFFERED_PAINTING
1830     RecreateBuffer();
1831 #endif
1832
1833     event.Skip();
1834 }
1835
1836
1837 /// Idle-time processing
1838 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1839 {
1840 #if wxRICHTEXT_USE_OWN_CARET
1841     if (((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
1842     {
1843         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate(false);
1844         PositionCaret();
1845         GetCaret()->Show();
1846     }
1847 #endif
1848
1849     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1850
1851     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1852     {
1853         m_fullLayoutRequired = false;
1854         m_fullLayoutTime = 0;
1855         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1856         ShowPosition(m_fullLayoutSavedPosition);
1857         Refresh(false);
1858     }
1859
1860     if (m_caretPositionForDefaultStyle != -2)
1861     {
1862         // If the caret position has changed, no longer reflect the default style
1863         // in the UI.
1864         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1865             m_caretPositionForDefaultStyle = -2;
1866     }
1867
1868     event.Skip();
1869 }
1870
1871 /// Scrolling
1872 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1873 {
1874 #if wxRICHTEXT_USE_OWN_CARET
1875     if (!((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
1876     {
1877         GetCaret()->Hide();
1878         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate();
1879     }
1880 #endif
1881
1882     event.Skip();
1883 }
1884
1885 /// Set up scrollbars, e.g. after a resize
1886 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1887 {
1888     if (IsFrozen())
1889         return;
1890
1891     if (GetBuffer().IsEmpty())
1892     {
1893         SetScrollbars(0, 0, 0, 0, 0, 0);
1894         return;
1895     }
1896
1897     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1898     // of pixels. See e.g. wxVScrolledWindow for ideas.
1899     int pixelsPerUnit = 5;
1900     wxSize clientSize = GetClientSize();
1901
1902     int maxHeight = GetBuffer().GetCachedSize().y;
1903
1904     // Round up so we have at least maxHeight pixels
1905     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1906
1907     int startX = 0, startY = 0;
1908     if (!atTop)
1909         GetViewStart(& startX, & startY);
1910
1911     int maxPositionX = 0;
1912     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
1913
1914     int newStartX = wxMin(maxPositionX, startX);
1915     int newStartY = wxMin(maxPositionY, startY);
1916
1917     int oldPPUX, oldPPUY;
1918     int oldStartX, oldStartY;
1919     int oldVirtualSizeX = 0, oldVirtualSizeY = 0;
1920     GetScrollPixelsPerUnit(& oldPPUX, & oldPPUY);
1921     GetViewStart(& oldStartX, & oldStartY);
1922     GetVirtualSize(& oldVirtualSizeX, & oldVirtualSizeY);
1923     if (oldPPUY > 0)
1924         oldVirtualSizeY /= oldPPUY;
1925
1926     if (oldPPUX == 0 && oldPPUY == pixelsPerUnit && oldVirtualSizeY == unitsY && oldStartX == newStartX && oldStartY == newStartY)
1927         return;
1928
1929     // Don't set scrollbars if there were none before, and there will be none now.
1930     if (oldPPUY != 0 && (oldVirtualSizeY < clientSize.y) && (unitsY*pixelsPerUnit < clientSize.y))
1931         return;
1932
1933     // Move to previous scroll position if
1934     // possible
1935     SetScrollbars(0, pixelsPerUnit, 0, unitsY, newStartX, newStartY);
1936 }
1937
1938 /// Paint the background
1939 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1940 {
1941     wxColour backgroundColour = GetBackgroundColour();
1942     if (!backgroundColour.Ok())
1943         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1944
1945     // Clear the background
1946     dc.SetBrush(wxBrush(backgroundColour));
1947     dc.SetPen(*wxTRANSPARENT_PEN);
1948     wxRect windowRect(GetClientSize());
1949     windowRect.x -= 2; windowRect.y -= 2;
1950     windowRect.width += 4; windowRect.height += 4;
1951
1952     // We need to shift the rectangle to take into account
1953     // scrolling. Converting device to logical coordinates.
1954     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1955     dc.DrawRectangle(windowRect);
1956 }
1957
1958 #if wxRICHTEXT_BUFFERED_PAINTING
1959 /// Recreate buffer bitmap if necessary
1960 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1961 {
1962     wxSize sz = size;
1963     if (sz == wxDefaultSize)
1964         sz = GetClientSize();
1965
1966     if (sz.x < 1 || sz.y < 1)
1967         return false;
1968
1969     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1970         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1971     return m_bufferBitmap.Ok();
1972 }
1973 #endif
1974
1975 // ----------------------------------------------------------------------------
1976 // file IO functions
1977 // ----------------------------------------------------------------------------
1978
1979 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
1980 {
1981     bool success = GetBuffer().LoadFile(filename, fileType);
1982     if (success)
1983         m_filename = filename;
1984
1985     DiscardEdits();
1986     SetInsertionPoint(0);
1987     LayoutContent();
1988     PositionCaret();
1989     SetupScrollbars(true);
1990     Refresh(false);
1991     wxTextCtrl::SendTextUpdatedEvent(this);
1992
1993     if (success)
1994         return true;
1995     else
1996     {
1997         wxLogError(_("File couldn't be loaded."));
1998
1999         return false;
2000     }
2001 }
2002
2003 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
2004 {
2005     if (GetBuffer().SaveFile(filename, fileType))
2006     {
2007         m_filename = filename;
2008
2009         DiscardEdits();
2010
2011         return true;
2012     }
2013
2014     wxLogError(_("The text couldn't be saved."));
2015
2016     return false;
2017 }
2018
2019 // ----------------------------------------------------------------------------
2020 // wxRichTextCtrl specific functionality
2021 // ----------------------------------------------------------------------------
2022
2023 /// Add a new paragraph of text to the end of the buffer
2024 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
2025 {
2026     wxRichTextRange range = GetBuffer().AddParagraph(text);
2027     LayoutContent();
2028     return range;
2029 }
2030
2031 /// Add an image
2032 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
2033 {
2034     wxRichTextRange range = GetBuffer().AddImage(image);
2035     LayoutContent();
2036     return range;
2037 }
2038
2039 // ----------------------------------------------------------------------------
2040 // selection and ranges
2041 // ----------------------------------------------------------------------------
2042
2043 void wxRichTextCtrl::SelectAll()
2044 {
2045     SetSelection(0, GetLastPosition()+1);
2046     m_selectionAnchor = -1;
2047 }
2048
2049 /// Select none
2050 void wxRichTextCtrl::SelectNone()
2051 {
2052     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
2053     {
2054         wxRichTextRange oldSelection = m_selectionRange;
2055
2056         m_selectionRange = wxRichTextRange(-2, -2);
2057
2058         RefreshForSelectionChange(oldSelection, m_selectionRange);
2059     }
2060     m_selectionAnchor = -2;
2061 }
2062
2063 static bool wxIsWordDelimiter(const wxString& text)
2064 {
2065     return !text.IsEmpty() && !wxIsalnum(text[0]);
2066 }
2067
2068 /// Select the word at the given character position
2069 bool wxRichTextCtrl::SelectWord(long position)
2070 {
2071     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
2072         return false;
2073
2074     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
2075     if (!para)
2076         return false;
2077
2078     if (position == para->GetRange().GetEnd())
2079         position --;
2080
2081     long positionStart = position;
2082     long positionEnd = position;
2083
2084     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
2085     {
2086         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
2087         if (wxIsWordDelimiter(text))
2088         {
2089             positionStart ++;
2090             break;
2091         }
2092     }
2093     if (positionStart < para->GetRange().GetStart())
2094         positionStart = para->GetRange().GetStart();
2095
2096     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
2097     {
2098         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
2099         if (wxIsWordDelimiter(text))
2100         {
2101             positionEnd --;
2102             break;
2103         }
2104     }
2105     if (positionEnd >= para->GetRange().GetEnd())
2106         positionEnd = para->GetRange().GetEnd();
2107
2108     if (positionEnd < positionStart)
2109         return false;
2110
2111     SetSelection(positionStart, positionEnd+1);
2112
2113     if (positionStart >= 0)
2114     {
2115         MoveCaret(positionStart-1, true);
2116         SetDefaultStyleToCursorStyle();
2117     }
2118
2119     return true;
2120 }
2121
2122 wxString wxRichTextCtrl::GetStringSelection() const
2123 {
2124     long from, to;
2125     GetSelection(&from, &to);
2126
2127     return GetRange(from, to);
2128 }
2129
2130 // ----------------------------------------------------------------------------
2131 // hit testing
2132 // ----------------------------------------------------------------------------
2133
2134 wxTextCtrlHitTestResult
2135 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2136 {
2137     // implement in terms of the other overload as the native ports typically
2138     // can get the position and not (x, y) pair directly (although wxUniv
2139     // directly gets x and y -- and so overrides this method as well)
2140     long pos;
2141     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2142
2143     if ( rc != wxTE_HT_UNKNOWN )
2144     {
2145         PositionToXY(pos, x, y);
2146     }
2147
2148     return rc;
2149 }
2150
2151 wxTextCtrlHitTestResult
2152 wxRichTextCtrl::HitTest(const wxPoint& pt,
2153                         long * pos) const
2154 {
2155     wxClientDC dc((wxRichTextCtrl*) this);
2156     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2157
2158     // Buffer uses logical position (relative to start of buffer)
2159     // so convert
2160     wxPoint pt2 = GetLogicalPoint(pt);
2161
2162     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
2163
2164     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2165         return wxTE_HT_BEFORE;
2166     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2167         return wxTE_HT_BEYOND;
2168     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2169         return wxTE_HT_ON_TEXT;
2170
2171     return wxTE_HT_UNKNOWN;
2172 }
2173
2174 // ----------------------------------------------------------------------------
2175 // set/get the controls text
2176 // ----------------------------------------------------------------------------
2177
2178 wxString wxRichTextCtrl::GetValue() const
2179 {
2180     return GetBuffer().GetText();
2181 }
2182
2183 wxString wxRichTextCtrl::GetRange(long from, long to) const
2184 {
2185     // Public API for range is different from internals
2186     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2187 }
2188
2189 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2190 {
2191     // Don't call Clear here, since it always sends a text updated event
2192     m_buffer.ResetAndClearCommands();
2193     m_buffer.SetDirty(true);
2194     m_caretPosition = -1;
2195     m_caretPositionForDefaultStyle = -2;
2196     m_caretAtLineStart = false;
2197     m_selectionRange.SetRange(-2, -2);
2198
2199     Scroll(0,0);
2200
2201     if (!IsFrozen())
2202     {
2203         LayoutContent();
2204         Refresh(false);
2205     }
2206
2207     if (!value.IsEmpty())
2208     {
2209         // Remove empty paragraph
2210         GetBuffer().Clear();
2211         DoWriteText(value, flags);
2212
2213         // for compatibility, don't move the cursor when doing SetValue()
2214         SetInsertionPoint(0);
2215     }
2216     else
2217     {
2218         // still send an event for consistency
2219         if (flags & SetValue_SendEvent)
2220             wxTextCtrl::SendTextUpdatedEvent(this);
2221     }
2222     DiscardEdits();
2223 }
2224
2225 void wxRichTextCtrl::WriteText(const wxString& value)
2226 {
2227     DoWriteText(value);
2228 }
2229
2230 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2231 {
2232     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2233
2234     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2235
2236     if ( flags & SetValue_SendEvent )
2237         wxTextCtrl::SendTextUpdatedEvent(this);
2238 }
2239
2240 void wxRichTextCtrl::AppendText(const wxString& text)
2241 {
2242     SetInsertionPointEnd();
2243
2244     WriteText(text);
2245 }
2246
2247 /// Write an image at the current insertion point
2248 bool wxRichTextCtrl::WriteImage(const wxImage& image, int bitmapType)
2249 {
2250     wxRichTextImageBlock imageBlock;
2251
2252     wxImage image2 = image;
2253     if (imageBlock.MakeImageBlock(image2, bitmapType))
2254         return WriteImage(imageBlock);
2255
2256     return false;
2257 }
2258
2259 bool wxRichTextCtrl::WriteImage(const wxString& filename, int bitmapType)
2260 {
2261     wxRichTextImageBlock imageBlock;
2262
2263     wxImage image;
2264     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2265         return WriteImage(imageBlock);
2266
2267     return false;
2268 }
2269
2270 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2271 {
2272     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2273 }
2274
2275 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, int bitmapType)
2276 {
2277     if (bitmap.Ok())
2278     {
2279         wxRichTextImageBlock imageBlock;
2280
2281         wxImage image = bitmap.ConvertToImage();
2282         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2283             return WriteImage(imageBlock);
2284     }
2285
2286     return false;
2287 }
2288
2289 /// Insert a newline (actually paragraph) at the current insertion point.
2290 bool wxRichTextCtrl::Newline()
2291 {
2292     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
2293 }
2294
2295 /// Insert a line break at the current insertion point.
2296 bool wxRichTextCtrl::LineBreak()
2297 {
2298     wxString text;
2299     text = wxRichTextLineBreakChar;
2300     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2301 }
2302
2303 // ----------------------------------------------------------------------------
2304 // Clipboard operations
2305 // ----------------------------------------------------------------------------
2306
2307 void wxRichTextCtrl::Copy()
2308 {
2309     if (CanCopy())
2310     {
2311         wxRichTextRange range = GetInternalSelectionRange();
2312         GetBuffer().CopyToClipboard(range);
2313     }
2314 }
2315
2316 void wxRichTextCtrl::Cut()
2317 {
2318     if (CanCut())
2319     {
2320         wxRichTextRange range = GetInternalSelectionRange();
2321         GetBuffer().CopyToClipboard(range);
2322
2323         DeleteSelectedContent();
2324         LayoutContent();
2325         Refresh(false);
2326     }
2327 }
2328
2329 void wxRichTextCtrl::Paste()
2330 {
2331     if (CanPaste())
2332     {
2333         BeginBatchUndo(_("Paste"));
2334
2335         long newPos = m_caretPosition;
2336         DeleteSelectedContent(& newPos);
2337
2338         GetBuffer().PasteFromClipboard(newPos);
2339
2340         EndBatchUndo();
2341     }
2342 }
2343
2344 void wxRichTextCtrl::DeleteSelection()
2345 {
2346     if (CanDeleteSelection())
2347     {
2348         DeleteSelectedContent();
2349     }
2350 }
2351
2352 bool wxRichTextCtrl::HasSelection() const
2353 {
2354     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2355 }
2356
2357 bool wxRichTextCtrl::CanCopy() const
2358 {
2359     // Can copy if there's a selection
2360     return HasSelection();
2361 }
2362
2363 bool wxRichTextCtrl::CanCut() const
2364 {
2365     return HasSelection() && IsEditable();
2366 }
2367
2368 bool wxRichTextCtrl::CanPaste() const
2369 {
2370     if ( !IsEditable() )
2371         return false;
2372
2373     return GetBuffer().CanPasteFromClipboard();
2374 }
2375
2376 bool wxRichTextCtrl::CanDeleteSelection() const
2377 {
2378     return HasSelection() && IsEditable();
2379 }
2380
2381
2382 // ----------------------------------------------------------------------------
2383 // Accessors
2384 // ----------------------------------------------------------------------------
2385
2386 void wxRichTextCtrl::SetEditable(bool editable)
2387 {
2388     m_editable = editable;
2389 }
2390
2391 void wxRichTextCtrl::SetInsertionPoint(long pos)
2392 {
2393     SelectNone();
2394
2395     m_caretPosition = pos - 1;
2396
2397     PositionCaret();
2398 }
2399
2400 void wxRichTextCtrl::SetInsertionPointEnd()
2401 {
2402     long pos = GetLastPosition();
2403     SetInsertionPoint(pos);
2404 }
2405
2406 long wxRichTextCtrl::GetInsertionPoint() const
2407 {
2408     return m_caretPosition+1;
2409 }
2410
2411 wxTextPos wxRichTextCtrl::GetLastPosition() const
2412 {
2413     return GetBuffer().GetRange().GetEnd();
2414 }
2415
2416 // If the return values from and to are the same, there is no
2417 // selection.
2418 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2419 {
2420     *from = m_selectionRange.GetStart();
2421     *to = m_selectionRange.GetEnd();
2422     if ((*to) != -1 && (*to) != -2)
2423         (*to) ++;
2424 }
2425
2426 bool wxRichTextCtrl::IsEditable() const
2427 {
2428     return m_editable;
2429 }
2430
2431 // ----------------------------------------------------------------------------
2432 // selection
2433 // ----------------------------------------------------------------------------
2434
2435 void wxRichTextCtrl::SetSelection(long from, long to)
2436 {
2437     // if from and to are both -1, it means (in wxWidgets) that all text should
2438     // be selected.
2439     if ( (from == -1) && (to == -1) )
2440     {
2441         from = 0;
2442         to = GetLastPosition()+1;
2443     }
2444
2445     DoSetSelection(from, to);
2446     SetDefaultStyleToCursorStyle();
2447 }
2448
2449 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2450 {
2451     if (from == to)
2452     {
2453         SelectNone();
2454     }
2455     else
2456     {
2457         wxRichTextRange oldSelection = m_selectionRange;
2458         m_selectionAnchor = from;
2459         m_selectionRange.SetRange(from, to-1);
2460         if (from > -2)
2461             m_caretPosition = from-1;
2462
2463         RefreshForSelectionChange(oldSelection, m_selectionRange);
2464         PositionCaret();
2465     }
2466 }
2467
2468 // ----------------------------------------------------------------------------
2469 // Editing
2470 // ----------------------------------------------------------------------------
2471
2472 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2473                              const wxString& value)
2474 {
2475     BeginBatchUndo(_("Replace"));
2476
2477     DeleteSelectedContent();
2478
2479     DoWriteText(value, SetValue_SelectionOnly);
2480
2481     EndBatchUndo();
2482 }
2483
2484 void wxRichTextCtrl::Remove(long from, long to)
2485 {
2486     SelectNone();
2487
2488     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to-1), this);
2489
2490     LayoutContent();
2491     if (!IsFrozen())
2492         Refresh(false);
2493 }
2494
2495 bool wxRichTextCtrl::IsModified() const
2496 {
2497     return m_buffer.IsModified();
2498 }
2499
2500 void wxRichTextCtrl::MarkDirty()
2501 {
2502     m_buffer.Modify(true);
2503 }
2504
2505 void wxRichTextCtrl::DiscardEdits()
2506 {
2507     m_caretPositionForDefaultStyle = -2;
2508     m_buffer.Modify(false);
2509     m_buffer.GetCommandProcessor()->ClearCommands();
2510 }
2511
2512 int wxRichTextCtrl::GetNumberOfLines() const
2513 {
2514     return GetBuffer().GetParagraphCount();
2515 }
2516
2517 // ----------------------------------------------------------------------------
2518 // Positions <-> coords
2519 // ----------------------------------------------------------------------------
2520
2521 long wxRichTextCtrl::XYToPosition(long x, long y) const
2522 {
2523     return GetBuffer().XYToPosition(x, y);
2524 }
2525
2526 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2527 {
2528     return GetBuffer().PositionToXY(pos, x, y);
2529 }
2530
2531 // ----------------------------------------------------------------------------
2532 //
2533 // ----------------------------------------------------------------------------
2534
2535 void wxRichTextCtrl::ShowPosition(long pos)
2536 {
2537     if (!IsPositionVisible(pos))
2538         ScrollIntoView(pos-1, WXK_DOWN);
2539 }
2540
2541 int wxRichTextCtrl::GetLineLength(long lineNo) const
2542 {
2543     return GetBuffer().GetParagraphLength(lineNo);
2544 }
2545
2546 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2547 {
2548     return GetBuffer().GetParagraphText(lineNo);
2549 }
2550
2551 // ----------------------------------------------------------------------------
2552 // Undo/redo
2553 // ----------------------------------------------------------------------------
2554
2555 void wxRichTextCtrl::Undo()
2556 {
2557     if (CanUndo())
2558     {
2559         GetCommandProcessor()->Undo();
2560     }
2561 }
2562
2563 void wxRichTextCtrl::Redo()
2564 {
2565     if (CanRedo())
2566     {
2567         GetCommandProcessor()->Redo();
2568     }
2569 }
2570
2571 bool wxRichTextCtrl::CanUndo() const
2572 {
2573     return GetCommandProcessor()->CanUndo();
2574 }
2575
2576 bool wxRichTextCtrl::CanRedo() const
2577 {
2578     return GetCommandProcessor()->CanRedo();
2579 }
2580
2581 // ----------------------------------------------------------------------------
2582 // implementation details
2583 // ----------------------------------------------------------------------------
2584
2585 void wxRichTextCtrl::Command(wxCommandEvent& event)
2586 {
2587     SetValue(event.GetString());
2588     GetEventHandler()->ProcessEvent(event);
2589 }
2590
2591 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2592 {
2593     // By default, load the first file into the text window.
2594     if (event.GetNumberOfFiles() > 0)
2595     {
2596         LoadFile(event.GetFiles()[0]);
2597     }
2598 }
2599
2600 wxSize wxRichTextCtrl::DoGetBestSize() const
2601 {
2602     return wxSize(10, 10);
2603 }
2604
2605 // ----------------------------------------------------------------------------
2606 // standard handlers for standard edit menu events
2607 // ----------------------------------------------------------------------------
2608
2609 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2610 {
2611     Cut();
2612 }
2613
2614 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2615 {
2616     DeleteSelection();
2617 }
2618
2619 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2620 {
2621     Copy();
2622 }
2623
2624 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2625 {
2626     Paste();
2627 }
2628
2629 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2630 {
2631     Undo();
2632 }
2633
2634 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2635 {
2636     Redo();
2637 }
2638
2639 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2640 {
2641     event.Enable( CanCut() );
2642 }
2643
2644 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2645 {
2646     event.Enable( CanCopy() );
2647 }
2648
2649 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2650 {
2651     event.Enable( CanDeleteSelection() );
2652 }
2653
2654 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2655 {
2656     event.Enable( CanPaste() );
2657 }
2658
2659 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2660 {
2661     event.Enable( CanUndo() );
2662     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2663 }
2664
2665 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2666 {
2667     event.Enable( CanRedo() );
2668     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2669 }
2670
2671 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2672 {
2673     SelectAll();
2674 }
2675
2676 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2677 {
2678     event.Enable(GetLastPosition() > 0);
2679 }
2680
2681 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2682 {
2683     if (event.GetEventObject() != this)
2684     {
2685         event.Skip();
2686         return;
2687     }
2688
2689     if (!m_contextMenu)
2690     {
2691         m_contextMenu = new wxMenu;
2692         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2693         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2694         m_contextMenu->AppendSeparator();
2695         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2696         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2697         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2698         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2699         m_contextMenu->AppendSeparator();
2700         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2701     }
2702     PopupMenu(m_contextMenu);
2703     return;
2704 }
2705
2706 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2707 {
2708     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttr(style));
2709 }
2710
2711 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxTextAttr& style)
2712 {
2713     return GetBuffer().SetStyle(range.ToInternal(), style);
2714 }
2715
2716 // extended style setting operation with flags including:
2717 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2718 // see richtextbuffer.h for more details.
2719
2720 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttr& style, int flags)
2721 {
2722     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2723 }
2724
2725 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2726 {
2727     return GetBuffer().SetDefaultStyle(wxTextAttr(style));
2728 }
2729
2730 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2731 {
2732     return GetBuffer().GetDefaultStyle();
2733 }
2734
2735 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2736 {
2737     return GetBuffer().GetStyle(position, style);
2738 }
2739
2740 // get the common set of styles for the range
2741 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttr& style)
2742 {
2743     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2744 }
2745
2746 /// Get the content (uncombined) attributes for this position.
2747 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2748 {
2749     return GetBuffer().GetUncombinedStyle(position, style);
2750 }
2751
2752 /// Set font, and also the buffer attributes
2753 bool wxRichTextCtrl::SetFont(const wxFont& font)
2754 {
2755     wxControl::SetFont(font);
2756
2757     wxTextAttr attr = GetBuffer().GetAttributes();
2758     attr.SetFont(font);
2759     GetBuffer().SetBasicStyle(attr);
2760
2761     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2762     Refresh(false);
2763
2764     return true;
2765 }
2766
2767 /// Transform logical to physical
2768 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2769 {
2770     wxPoint pt;
2771     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2772
2773     return pt;
2774 }
2775
2776 /// Transform physical to logical
2777 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2778 {
2779     wxPoint pt;
2780     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2781
2782     return pt;
2783 }
2784
2785 /// Position the caret
2786 void wxRichTextCtrl::PositionCaret()
2787 {
2788     if (!GetCaret())
2789         return;
2790
2791     //wxLogDebug(wxT("PositionCaret"));
2792
2793     wxRect caretRect;
2794     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2795     {
2796         wxPoint newPt = caretRect.GetPosition();
2797         wxSize newSz = caretRect.GetSize();
2798         wxPoint pt = GetPhysicalPoint(newPt);
2799         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
2800         {
2801             GetCaret()->Hide();
2802             if (GetCaret()->GetSize() != newSz)
2803                 GetCaret()->SetSize(newSz);
2804             GetCaret()->Move(pt);
2805             GetCaret()->Show();
2806         }
2807     }
2808 }
2809
2810 /// Get the caret height and position for the given character position
2811 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2812 {
2813     wxClientDC dc(this);
2814     dc.SetFont(GetFont());
2815
2816     PrepareDC(dc);
2817
2818     wxPoint pt;
2819     int height = 0;
2820
2821     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2822     {
2823         // Caret height can't be zero
2824         if (height == 0)
2825             height = dc.GetCharHeight();
2826
2827         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2828         return true;
2829     }
2830
2831     return false;
2832 }
2833
2834 /// Gets the line for the visible caret position. If the caret is
2835 /// shown at the very end of the line, it means the next character is actually
2836 /// on the following line. So let's get the line we're expecting to find
2837 /// if this is the case.
2838 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2839 {
2840     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2841     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2842     if (line)
2843     {
2844         wxRichTextRange lineRange = line->GetAbsoluteRange();
2845         if (caretPosition == lineRange.GetStart()-1 &&
2846             (para->GetRange().GetStart() != lineRange.GetStart()))
2847         {
2848             if (!m_caretAtLineStart)
2849                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2850         }
2851     }
2852     return line;
2853 }
2854
2855
2856 /// Move the caret to the given character position
2857 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2858 {
2859     if (GetBuffer().GetDirty())
2860         LayoutContent();
2861
2862     if (pos <= GetBuffer().GetRange().GetEnd())
2863     {
2864         SetCaretPosition(pos, showAtLineStart);
2865
2866         PositionCaret();
2867
2868         return true;
2869     }
2870     else
2871         return false;
2872 }
2873
2874 /// Layout the buffer: which we must do before certain operations, such as
2875 /// setting the caret position.
2876 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2877 {
2878     if (GetBuffer().GetDirty() || onlyVisibleRect)
2879     {
2880         wxRect availableSpace(GetClientSize());
2881         if (availableSpace.width == 0)
2882             availableSpace.width = 10;
2883         if (availableSpace.height == 0)
2884             availableSpace.height = 10;
2885
2886         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2887         if (onlyVisibleRect)
2888         {
2889             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2890             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2891         }
2892
2893         wxClientDC dc(this);
2894         dc.SetFont(GetFont());
2895
2896         PrepareDC(dc);
2897
2898         GetBuffer().Defragment();
2899         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2900         GetBuffer().Layout(dc, availableSpace, flags);
2901         GetBuffer().SetDirty(false);
2902
2903         if (!IsFrozen())
2904             SetupScrollbars();
2905     }
2906
2907     return true;
2908 }
2909
2910 /// Is all of the selection bold?
2911 bool wxRichTextCtrl::IsSelectionBold()
2912 {
2913     if (HasSelection())
2914     {
2915         wxTextAttr attr;
2916         wxRichTextRange range = GetSelectionRange();
2917         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2918         attr.SetFontWeight(wxBOLD);
2919
2920         return HasCharacterAttributes(range, attr);
2921     }
2922     else
2923     {
2924         // If no selection, then we need to combine current style with default style
2925         // to see what the effect would be if we started typing.
2926         wxTextAttr attr;
2927         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2928
2929         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2930         if (GetStyle(pos, attr))
2931         {
2932             if (IsDefaultStyleShowing())
2933                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2934             return attr.GetFontWeight() == wxBOLD;
2935         }
2936     }
2937     return false;
2938 }
2939
2940 /// Is all of the selection italics?
2941 bool wxRichTextCtrl::IsSelectionItalics()
2942 {
2943     if (HasSelection())
2944     {
2945         wxRichTextRange range = GetSelectionRange();
2946         wxTextAttr attr;
2947         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2948         attr.SetFontStyle(wxITALIC);
2949
2950         return HasCharacterAttributes(range, attr);
2951     }
2952     else
2953     {
2954         // If no selection, then we need to combine current style with default style
2955         // to see what the effect would be if we started typing.
2956         wxTextAttr attr;
2957         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2958
2959         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2960         if (GetStyle(pos, attr))
2961         {
2962             if (IsDefaultStyleShowing())
2963                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2964             return attr.GetFontStyle() == wxITALIC;
2965         }
2966     }
2967     return false;
2968 }
2969
2970 /// Is all of the selection underlined?
2971 bool wxRichTextCtrl::IsSelectionUnderlined()
2972 {
2973     if (HasSelection())
2974     {
2975         wxRichTextRange range = GetSelectionRange();
2976         wxTextAttr attr;
2977         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2978         attr.SetFontUnderlined(true);
2979
2980         return HasCharacterAttributes(range, attr);
2981     }
2982     else
2983     {
2984         // If no selection, then we need to combine current style with default style
2985         // to see what the effect would be if we started typing.
2986         wxTextAttr attr;
2987         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2988         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2989
2990         if (GetStyle(pos, attr))
2991         {
2992             if (IsDefaultStyleShowing())
2993                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2994             return attr.GetFontUnderlined();
2995         }
2996     }
2997     return false;
2998 }
2999
3000 /// Apply bold to the selection
3001 bool wxRichTextCtrl::ApplyBoldToSelection()
3002 {
3003     wxTextAttr attr;
3004     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3005     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
3006
3007     if (HasSelection())
3008         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3009     else
3010     {
3011         wxRichTextAttr current = GetDefaultStyleEx();
3012         current.Apply(attr);
3013         SetAndShowDefaultStyle(current);
3014     }
3015     return true;
3016 }
3017
3018 /// Apply italic to the selection
3019 bool wxRichTextCtrl::ApplyItalicToSelection()
3020 {
3021     wxTextAttr attr;
3022     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3023     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
3024
3025     if (HasSelection())
3026         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3027     else
3028     {
3029         wxRichTextAttr current = GetDefaultStyleEx();
3030         current.Apply(attr);
3031         SetAndShowDefaultStyle(current);
3032     }
3033     return true;
3034 }
3035
3036 /// Apply underline to the selection
3037 bool wxRichTextCtrl::ApplyUnderlineToSelection()
3038 {
3039     wxTextAttr attr;
3040     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3041     attr.SetFontUnderlined(!IsSelectionUnderlined());
3042
3043     if (HasSelection())
3044         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3045     else
3046     {
3047         wxRichTextAttr current = GetDefaultStyleEx();
3048         current.Apply(attr);
3049         SetAndShowDefaultStyle(current);
3050     }
3051     return true;
3052 }
3053
3054 /// Is all of the selection aligned according to the specified flag?
3055 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
3056 {
3057     wxRichTextRange range;
3058     if (HasSelection())
3059         range = GetSelectionRange();
3060     else
3061         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
3062
3063     wxTextAttr attr;
3064     attr.SetAlignment(alignment);
3065
3066     return HasParagraphAttributes(range, attr);
3067 }
3068
3069 /// Apply alignment to the selection
3070 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
3071 {
3072     wxTextAttr attr;
3073     attr.SetAlignment(alignment);
3074     if (HasSelection())
3075         return SetStyle(GetSelectionRange(), attr);
3076     else
3077     {
3078         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
3079         if (para)
3080             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
3081     }
3082     return true;
3083 }
3084
3085 /// Apply a named style to the selection
3086 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
3087 {
3088     // Flags are defined within each definition, so only certain
3089     // attributes are applied.
3090     wxTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
3091
3092     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_RESET;
3093
3094     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
3095     {
3096         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3097
3098         wxRichTextRange range;
3099
3100         if (HasSelection())
3101             range = GetSelectionRange();
3102         else
3103         {
3104             long pos = GetAdjustedCaretPosition(GetCaretPosition());
3105             range = wxRichTextRange(pos, pos+1);
3106         }
3107
3108         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
3109     }
3110
3111     // Make sure the attr has the style name
3112     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
3113     {
3114         attr.SetParagraphStyleName(def->GetName());
3115
3116         // If applying a paragraph style, we only want the paragraph nodes to adopt these
3117         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
3118         // to change its style independently.
3119         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3120     }
3121     else
3122         attr.SetCharacterStyleName(def->GetName());
3123
3124     if (HasSelection())
3125         return SetStyleEx(GetSelectionRange(), attr, flags);
3126     else
3127     {
3128         wxRichTextAttr current = GetDefaultStyleEx();
3129         current.Apply(attr);
3130         SetAndShowDefaultStyle(current);
3131         return true;
3132     }
3133 }
3134
3135 /// Apply the style sheet to the buffer, for example if the styles have changed.
3136 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
3137 {
3138     if (!styleSheet)
3139         styleSheet = GetBuffer().GetStyleSheet();
3140     if (!styleSheet)
3141         return false;
3142
3143     if (GetBuffer().ApplyStyleSheet(styleSheet))
3144     {
3145         GetBuffer().Invalidate(wxRICHTEXT_ALL);
3146         Refresh(false);
3147         return true;
3148     }
3149     else
3150         return false;
3151 }
3152
3153 /// Sets the default style to the style under the cursor
3154 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3155 {
3156     wxTextAttr attr;
3157     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3158
3159     // If at the start of a paragraph, use the next position.
3160     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3161
3162     if (GetUncombinedStyle(pos, attr))
3163     {
3164         SetDefaultStyle(attr);
3165         return true;
3166     }
3167
3168     return false;
3169 }
3170
3171 /// Returns the first visible position in the current view
3172 long wxRichTextCtrl::GetFirstVisiblePosition() const
3173 {
3174     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3175     if (line)
3176         return line->GetAbsoluteRange().GetStart();
3177     else
3178         return 0;
3179 }
3180
3181 /// Get the first visible point in the window
3182 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3183 {
3184     int ppuX, ppuY;
3185     int startXUnits, startYUnits;
3186
3187     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3188     GetViewStart(& startXUnits, & startYUnits);
3189
3190     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3191 }
3192
3193 /// The adjusted caret position is the character position adjusted to take
3194 /// into account whether we're at the start of a paragraph, in which case
3195 /// style information should be taken from the next position, not current one.
3196 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3197 {
3198     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3199
3200     if (para && (caretPos+1 == para->GetRange().GetStart()))
3201         caretPos ++;
3202     return caretPos;
3203 }
3204
3205 /// Get/set the selection range in character positions. -1, -1 means no selection.
3206 /// The range is in API convention, i.e. a single character selection is denoted
3207 /// by (n, n+1)
3208 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3209 {
3210     wxRichTextRange range = GetInternalSelectionRange();
3211     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3212         range.SetEnd(range.GetEnd() + 1);
3213     return range;
3214 }
3215
3216 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3217 {
3218     wxRichTextRange range1(range);
3219     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3220         range1.SetEnd(range1.GetEnd() - 1);
3221
3222     wxASSERT( range1.GetStart() > range1.GetEnd() );
3223
3224     SetInternalSelectionRange(range1);
3225 }
3226
3227 /// Set list style
3228 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3229 {
3230     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3231 }
3232
3233 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3234 {
3235     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3236 }
3237
3238 /// Clear list for given range
3239 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3240 {
3241     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3242 }
3243
3244 /// Number/renumber any list elements in the given range
3245 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3246 {
3247     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3248 }
3249
3250 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3251 {
3252     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3253 }
3254
3255 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3256 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3257 {
3258     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3259 }
3260
3261 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3262 {
3263     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3264 }
3265
3266 /// Deletes the content in the given range
3267 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3268 {
3269     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3270 }
3271
3272 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3273 {
3274     if (sm_availableFontNames.GetCount() == 0)
3275     {
3276         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3277         sm_availableFontNames.Sort();
3278     }
3279     return sm_availableFontNames;
3280 }
3281
3282 void wxRichTextCtrl::ClearAvailableFontNames()
3283 {
3284     sm_availableFontNames.Clear();
3285 }
3286
3287 void wxRichTextCtrl::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
3288 {
3289     //wxLogDebug(wxT("wxRichTextCtrl::OnSysColourChanged"));
3290
3291     wxTextAttrEx basicStyle = GetBasicStyle();
3292     basicStyle.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
3293     SetBasicStyle(basicStyle);
3294     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
3295
3296     Refresh();
3297 }
3298
3299 // Refresh the area affected by a selection change
3300 bool wxRichTextCtrl::RefreshForSelectionChange(const wxRichTextRange& oldSelection, const wxRichTextRange& newSelection)
3301 {
3302     // Calculate the refresh rectangle - just the affected lines
3303     long firstPos, lastPos;
3304     if (oldSelection.GetStart() == -2 && newSelection.GetStart() != -2)
3305     {
3306         firstPos = newSelection.GetStart();
3307         lastPos = newSelection.GetEnd();
3308     }
3309     else if (oldSelection.GetStart() != -2 && newSelection.GetStart() == -2)
3310     {
3311         firstPos = oldSelection.GetStart();
3312         lastPos = oldSelection.GetEnd();
3313     }
3314     else if (oldSelection.GetStart() == -2 && newSelection.GetStart() == -2)
3315     {
3316         return false;
3317     }
3318     else
3319     {
3320         firstPos = wxMin(oldSelection.GetStart(), newSelection.GetStart());
3321         lastPos = wxMax(oldSelection.GetEnd(), newSelection.GetEnd());
3322     }
3323
3324     wxRichTextLine* firstLine = GetBuffer().GetLineAtPosition(firstPos);
3325     wxRichTextLine* lastLine = GetBuffer().GetLineAtPosition(lastPos);
3326
3327     if (firstLine && lastLine)
3328     {
3329         wxSize clientSize = GetClientSize();
3330         wxPoint pt1 = GetPhysicalPoint(firstLine->GetAbsolutePosition());
3331         wxPoint pt2 = GetPhysicalPoint(lastLine->GetAbsolutePosition()) + wxPoint(0, lastLine->GetSize().y);
3332
3333         pt1.x = 0;
3334         pt1.y = wxMax(0, pt1.y);
3335         pt2.x = 0;
3336         pt2.y = wxMin(clientSize.y, pt2.y);
3337
3338         wxRect rect(pt1, wxSize(clientSize.x, pt2.y - pt1.y));
3339         RefreshRect(rect, false);
3340     }
3341     else
3342         Refresh(false);
3343
3344     return true;
3345 }
3346
3347 #if wxRICHTEXT_USE_OWN_CARET
3348
3349 // ----------------------------------------------------------------------------
3350 // initialization and destruction
3351 // ----------------------------------------------------------------------------
3352
3353 void wxRichTextCaret::Init()
3354 {
3355     m_hasFocus = true;
3356
3357     m_xOld =
3358     m_yOld = -1;
3359     m_richTextCtrl = NULL;
3360     m_needsUpdate = false;
3361 }
3362
3363 wxRichTextCaret::~wxRichTextCaret()
3364 {
3365 }
3366
3367 // ----------------------------------------------------------------------------
3368 // showing/hiding/moving the caret (base class interface)
3369 // ----------------------------------------------------------------------------
3370
3371 void wxRichTextCaret::DoShow()
3372 {
3373     Refresh();
3374 }
3375
3376 void wxRichTextCaret::DoHide()
3377 {
3378     Refresh();
3379 }
3380
3381 void wxRichTextCaret::DoMove()
3382 {
3383     if (IsVisible())
3384     {
3385         Refresh();
3386
3387         if (m_xOld != -1 && m_yOld != -1)
3388         {
3389             if (m_richTextCtrl)
3390             {
3391                 wxRect rect(GetPosition(), GetSize());
3392                 m_richTextCtrl->RefreshRect(rect, false);
3393             }
3394         }
3395     }
3396
3397     m_xOld = m_x;
3398     m_yOld = m_y;
3399 }
3400
3401 void wxRichTextCaret::DoSize()
3402 {
3403     int countVisible = m_countVisible;
3404     if (countVisible > 0)
3405     {
3406         m_countVisible = 0;
3407         DoHide();
3408     }
3409
3410     if (countVisible > 0)
3411     {
3412         m_countVisible = countVisible;
3413         DoShow();
3414     }
3415 }
3416
3417 // ----------------------------------------------------------------------------
3418 // handling the focus
3419 // ----------------------------------------------------------------------------
3420
3421 void wxRichTextCaret::OnSetFocus()
3422 {
3423     m_hasFocus = true;
3424
3425     if ( IsVisible() )
3426         Refresh();
3427 }
3428
3429 void wxRichTextCaret::OnKillFocus()
3430 {
3431     m_hasFocus = false;
3432 }
3433
3434 // ----------------------------------------------------------------------------
3435 // drawing the caret
3436 // ----------------------------------------------------------------------------
3437
3438 void wxRichTextCaret::Refresh()
3439 {
3440     if (m_richTextCtrl)
3441     {
3442         wxRect rect(GetPosition(), GetSize());
3443         m_richTextCtrl->RefreshRect(rect, false);
3444     }
3445 }
3446
3447 void wxRichTextCaret::DoDraw(wxDC *dc)
3448 {
3449     dc->SetPen( *wxBLACK_PEN );
3450
3451     dc->SetBrush(*(m_hasFocus ? wxBLACK_BRUSH : wxTRANSPARENT_BRUSH));
3452     dc->SetPen(*wxBLACK_PEN);
3453
3454     // VZ: unfortunately, the rectangle comes out a pixel smaller when this is
3455     //     done under wxGTK - no idea why
3456     //dc->SetLogicalFunction(wxINVERT);
3457
3458     wxPoint pt(m_x, m_y);
3459
3460     if (m_richTextCtrl)
3461     {
3462         pt = m_richTextCtrl->GetLogicalPoint(pt);
3463     }
3464     dc->DrawRectangle(pt.x, pt.y, m_width, m_height);
3465 }
3466 #endif
3467     // wxRICHTEXT_USE_OWN_CARET
3468
3469 #endif
3470     // wxUSE_RICHTEXT