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 #include "wx/accel.h"
  36
  37 // DLL options compatibility check:
  38 #include "wx/app.h"
  39 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  40
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_CLICK)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK)
  45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RETURN)
  46 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CHARACTER)
  47 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_DELETE)
  48
  49 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING)
  50 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED)
  51 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING)
  52 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED)
  53
  54 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED)
  55 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED)
  56 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED)
  57 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED)
  58 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_BUFFER_RESET)
  59
  60 #if wxRICHTEXT_USE_OWN_CARET
  61
  62 /*!
  63  * wxRichTextCaret
  64  *
  65  * This implements a non-flashing cursor in case there
  66  * are platform-specific problems with the generic caret.
  67  * wxRICHTEXT_USE_OWN_CARET is set in richtextbuffer.h.
  68  */
  69
  70 class wxRichTextCaret: public wxCaret
  71 {
  72 public:
  73     // ctors
  74     // -----
  75         // default - use Create()
  76     wxRichTextCaret() { Init(); }
  77         // creates a block caret associated with the given window
  78     wxRichTextCaret(wxRichTextCtrl *window, int width, int height)
  79         : wxCaret(window, width, height) { Init(); m_richTextCtrl = window; }
  80     wxRichTextCaret(wxRichTextCtrl *window, const wxSize& size)
  81         : wxCaret(window, size) { Init(); m_richTextCtrl = window; }
  82
  83     virtual ~wxRichTextCaret();
  84
  85     // implementation
  86     // --------------
  87
  88     // called by wxWindow (not using the event tables)
  89     virtual void OnSetFocus();
  90     virtual void OnKillFocus();
  91
  92     // draw the caret on the given DC
  93     void DoDraw(wxDC *dc);
  94
  95     // get the visible count
  96     int GetVisibleCount() const { return m_countVisible; }
  97
  98     // delay repositioning
  99     bool GetNeedsUpdate() const { return m_needsUpdate; }
 100     void SetNeedsUpdate(bool needsUpdate = true ) { m_needsUpdate = needsUpdate; }
 101
 102 protected:
 103     virtual void DoShow();
 104     virtual void DoHide();
 105     virtual void DoMove();
 106     virtual void DoSize();
 107
 108     // refresh the caret
 109     void Refresh();
 110
 111 private:
 112     void Init();
 113
 114     int           m_xOld,
 115                   m_yOld;
 116     bool          m_hasFocus;       // true => our window has focus
 117     bool          m_needsUpdate;    // must be repositioned
 118
 119     wxRichTextCtrl* m_richTextCtrl;
 120 };
 121 #endif
 122
 123 IMPLEMENT_CLASS( wxRichTextCtrl, wxControl )
 124
 125 IMPLEMENT_CLASS( wxRichTextEvent, wxNotifyEvent )
 126
 127 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
 128     EVT_PAINT(wxRichTextCtrl::OnPaint)
 129     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
 130     EVT_IDLE(wxRichTextCtrl::OnIdle)
 131     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
 132     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
 133     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
 134     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
 135     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
 136     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
 137     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
 138     EVT_CHAR(wxRichTextCtrl::OnChar)
 139     EVT_SIZE(wxRichTextCtrl::OnSize)
 140     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
 141     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
 142     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
 143     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
 144     EVT_SYS_COLOUR_CHANGED(wxRichTextCtrl::OnSysColourChanged)
 145
 146     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
 147     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
 148
 149     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
 150     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
 151
 152     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
 153     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
 154
 155     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
 156     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
 157
 158     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
 159     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
 160
 161     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
 162     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
 163
 164     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
 165     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 166 END_EVENT_TABLE()
 167
 168 /*!
 169  * wxRichTextCtrl
 170  */
 171
 172 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 173
 174 wxRichTextCtrl::wxRichTextCtrl()
 175               : wxScrollHelper(this)
 176 {
 177     Init();
 178 }
 179
 180 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 181                                wxWindowID id,
 182                                const wxString& value,
 183                                const wxPoint& pos,
 184                                const wxSize& size,
 185                                long style,
 186                                const wxValidator& validator,
 187                                const wxString& name)
 188               : wxScrollHelper(this)
 189 {
 190     Init();
 191     Create(parent, id, value, pos, size, style, validator, name);
 192 }
 193
 194 /// Creation
 195 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 196                              const wxValidator& validator, const wxString& name)
 197 {
 198     if (!wxControl::Create(parent, id, pos, size,
 199                            style|wxFULL_REPAINT_ON_RESIZE,
 200                            validator, name))
 201         return false;
 202
 203     if (!GetFont().Ok())
 204     {
 205         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 206     }
 207
 208     if (style & wxTE_READONLY)
 209         SetEditable(false);
 210
 211     // The base attributes must all have default values
 212     wxTextAttr attributes;
 213     attributes.SetFont(GetFont());
 214     attributes.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
 215     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 216     attributes.SetLineSpacing(10);
 217     attributes.SetParagraphSpacingAfter(10);
 218     attributes.SetParagraphSpacingBefore(0);
 219     attributes.SetTextEffects(0);
 220     attributes.SetTextEffectFlags(wxTEXT_ATTR_EFFECT_STRIKETHROUGH|wxTEXT_ATTR_EFFECT_CAPITALS);
 221
 222     SetBasicStyle(attributes);
 223
 224     // The default attributes will be merged with base attributes, so
 225     // can be empty to begin with
 226     wxTextAttr defaultAttributes;
 227     SetDefaultStyle(defaultAttributes);
 228
 229     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 230     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 231
 232     GetBuffer().Reset();
 233     GetBuffer().SetRichTextCtrl(this);
 234
 235 #if wxRICHTEXT_USE_OWN_CARET
 236     SetCaret(new wxRichTextCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 237 #else
 238     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 239 #endif
 240
 241     // Tell the sizers to use the given or best size
 242     SetInitialSize(size);
 243
 244 #if wxRICHTEXT_BUFFERED_PAINTING
 245     // Create a buffer
 246     RecreateBuffer(size);
 247 #endif
 248
 249     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 250     m_urlCursor = wxCursor(wxCURSOR_HAND);
 251
 252     SetCursor(m_textCursor);
 253
 254     if (!value.IsEmpty())
 255         SetValue(value);
 256
 257     GetBuffer().AddEventHandler(this);
 258
 259     // Accelerators
 260     wxAcceleratorEntry entries[4];
 261
 262     entries[0].Set(wxACCEL_CMD,   (int) 'C',       wxID_COPY);
 263     entries[1].Set(wxACCEL_CMD,   (int) 'X',       wxID_CUT);
 264     entries[2].Set(wxACCEL_CMD,   (int) 'V',       wxID_PASTE);
 265     entries[3].Set(wxACCEL_CMD,   (int) 'A',       wxID_SELECTALL);
 266
 267     wxAcceleratorTable accel(4, entries);
 268     SetAcceleratorTable(accel);
 269
 270     return true;
 271 }
 272
 273 wxRichTextCtrl::~wxRichTextCtrl()
 274 {
 275     GetBuffer().RemoveEventHandler(this);
 276
 277     delete m_contextMenu;
 278 }
 279
 280 /// Member initialisation
 281 void wxRichTextCtrl::Init()
 282 {
 283     m_contextMenu = NULL;
 284     m_caret = NULL;
 285     m_caretPosition = -1;
 286     m_selectionRange.SetRange(-2, -2);
 287     m_selectionAnchor = -2;
 288     m_editable = true;
 289     m_caretAtLineStart = false;
 290     m_dragging = false;
 291     m_fullLayoutRequired = false;
 292     m_fullLayoutTime = 0;
 293     m_fullLayoutSavedPosition = 0;
 294     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 295     m_caretPositionForDefaultStyle = -2;
 296 }
 297
 298 void wxRichTextCtrl::DoThaw()
 299 {
 300     if (GetBuffer().GetDirty())
 301         LayoutContent();
 302     else
 303         SetupScrollbars();
 304     Refresh(false);
 305 }
 306
 307 /// Clear all text
 308 void wxRichTextCtrl::Clear()
 309 {
 310     m_buffer.ResetAndClearCommands();
 311     m_buffer.SetDirty(true);
 312     m_caretPosition = -1;
 313     m_caretPositionForDefaultStyle = -2;
 314     m_caretAtLineStart = false;
 315     m_selectionRange.SetRange(-2, -2);
 316
 317     Scroll(0,0);
 318
 319     if (!IsFrozen())
 320     {
 321         LayoutContent();
 322         Refresh(false);
 323     }
 324
 325     wxTextCtrl::SendTextUpdatedEvent(this);
 326 }
 327
 328 /// Painting
 329 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 330 {
 331 #if !wxRICHTEXT_USE_OWN_CARET
 332     if (GetCaret() && !IsFrozen())
 333         GetCaret()->Hide();
 334 #endif
 335
 336     {
 337 #if wxRICHTEXT_BUFFERED_PAINTING
 338         wxBufferedPaintDC dc(this, m_bufferBitmap);
 339 #else
 340         wxPaintDC dc(this);
 341 #endif
 342
 343         if (IsFrozen())
 344             return;
 345
 346         PrepareDC(dc);
 347
 348         dc.SetFont(GetFont());
 349
 350         // Paint the background
 351         PaintBackground(dc);
 352
 353         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 354
 355         wxRect drawingArea(GetUpdateRegion().GetBox());
 356         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 357
 358         wxRect availableSpace(GetClientSize());
 359         if (GetBuffer().GetDirty())
 360         {
 361             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 362             GetBuffer().SetDirty(false);
 363             SetupScrollbars();
 364         }
 365
 366         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 367 #if wxRICHTEXT_USE_OWN_CARET
 368         if (GetCaret()->IsVisible())
 369         {
 370             ((wxRichTextCaret*) GetCaret())->DoDraw(& dc);
 371         }
 372 #endif
 373     }
 374
 375 #if !wxRICHTEXT_USE_OWN_CARET
 376     if (GetCaret())
 377         GetCaret()->Show();
 378     PositionCaret();
 379 #endif
 380 }
 381
 382 // Empty implementation, to prevent flicker
 383 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 384 {
 385 }
 386
 387 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 388 {
 389     if (GetCaret())
 390     {
 391 #if !wxRICHTEXT_USE_OWN_CARET
 392         PositionCaret();
 393 #endif
 394         GetCaret()->Show();
 395     }
 396
 397 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 398     // Work around dropouts when control is focused
 399     if (!IsFrozen())
 400     {
 401         Refresh(false);
 402     }
 403 #endif
 404 }
 405
 406 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 407 {
 408     if (GetCaret())
 409         GetCaret()->Hide();
 410
 411 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 412     // Work around dropouts when control is focused
 413     if (!IsFrozen())
 414     {
 415         Refresh(false);
 416     }
 417 #endif
 418 }
 419
 420 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 421 {
 422     m_dragging = false;
 423 }
 424
 425 /// Left-click
 426 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 427 {
 428     SetFocus();
 429
 430     wxClientDC dc(this);
 431     PrepareDC(dc);
 432     dc.SetFont(GetFont());
 433
 434     long position = 0;
 435     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 436
 437     if (hit != wxRICHTEXT_HITTEST_NONE)
 438     {
 439         m_dragStart = event.GetLogicalPosition(dc);
 440         m_dragging = true;
 441         CaptureMouse();
 442
 443         bool caretAtLineStart = false;
 444
 445         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 446         {
 447             // If we're at the start of a line (but not first in para)
 448             // then we should keep the caret showing at the start of the line
 449             // by showing the m_caretAtLineStart flag.
 450             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 451             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 452
 453             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 454                 caretAtLineStart = true;
 455             position --;
 456         }
 457
 458         long oldCaretPos = m_caretPosition;
 459
 460         MoveCaret(position, caretAtLineStart);
 461         SetDefaultStyleToCursorStyle();
 462
 463         if (event.ShiftDown())
 464         {
 465             if (m_selectionRange.GetStart() == -2)
 466                 ExtendSelection(oldCaretPos, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 467             else
 468                 ExtendSelection(m_caretPosition, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 469         }
 470         else
 471             SelectNone();
 472     }
 473
 474     event.Skip();
 475 }
 476
 477 /// Left-up
 478 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 479 {
 480     if (m_dragging)
 481     {
 482         m_dragging = false;
 483         if (GetCapture() == this)
 484             ReleaseMouse();
 485
 486         // See if we clicked on a URL
 487         wxClientDC dc(this);
 488         PrepareDC(dc);
 489         dc.SetFont(GetFont());
 490
 491         long position = 0;
 492         wxPoint logicalPt = event.GetLogicalPosition(dc);
 493         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 494
 495         if ((hit != wxRICHTEXT_HITTEST_NONE) && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 496         {
 497             wxRichTextEvent cmdEvent(
 498                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 499                 GetId());
 500             cmdEvent.SetEventObject(this);
 501             cmdEvent.SetPosition(m_caretPosition+1);
 502
 503             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 504             {
 505                 wxTextAttr attr;
 506                 if (GetStyle(position, attr))
 507                 {
 508                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 509                     {
 510                         wxString urlTarget = attr.GetURL();
 511                         if (!urlTarget.IsEmpty())
 512                         {
 513                             wxMouseEvent mouseEvent(event);
 514
 515                             long startPos = 0, endPos = 0;
 516                             wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 517                             if (obj)
 518                             {
 519                                 startPos = obj->GetRange().GetStart();
 520                                 endPos = obj->GetRange().GetEnd();
 521                             }
 522
 523                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 524                             InitCommandEvent(urlEvent);
 525
 526                             urlEvent.SetString(urlTarget);
 527
 528                             GetEventHandler()->ProcessEvent(urlEvent);
 529                         }
 530                     }
 531                 }
 532             }
 533         }
 534     }
 535 }
 536
 537 /// Left-click
 538 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 539 {
 540     wxClientDC dc(this);
 541     PrepareDC(dc);
 542     dc.SetFont(GetFont());
 543
 544     long position = 0;
 545     wxPoint logicalPt = event.GetLogicalPosition(dc);
 546     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 547
 548     // See if we need to change the cursor
 549
 550     {
 551         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 552         {
 553             wxTextAttr attr;
 554             if (GetStyle(position, attr))
 555             {
 556                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 557                 {
 558                     SetCursor(m_urlCursor);
 559                 }
 560                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 561                 {
 562                     SetCursor(m_textCursor);
 563                 }
 564             }
 565         }
 566         else
 567             SetCursor(m_textCursor);
 568     }
 569
 570     if (!event.Dragging())
 571     {
 572         event.Skip();
 573         return;
 574     }
 575
 576     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 577     {
 578         // TODO: test closeness
 579
 580         bool caretAtLineStart = false;
 581
 582         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 583         {
 584             // If we're at the start of a line (but not first in para)
 585             // then we should keep the caret showing at the start of the line
 586             // by showing the m_caretAtLineStart flag.
 587             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 588             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 589
 590             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 591                 caretAtLineStart = true;
 592             position --;
 593         }
 594
 595         if (m_caretPosition != position)
 596         {
 597             ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 598
 599             MoveCaret(position, caretAtLineStart);
 600             SetDefaultStyleToCursorStyle();
 601         }
 602     }
 603 }
 604
 605 /// Right-click
 606 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 607 {
 608     SetFocus();
 609
 610     wxRichTextEvent cmdEvent(
 611         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 612         GetId());
 613     cmdEvent.SetEventObject(this);
 614     cmdEvent.SetPosition(m_caretPosition+1);
 615
 616     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 617         event.Skip();
 618 }
 619
 620 /// Left-double-click
 621 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 622 {
 623     wxRichTextEvent cmdEvent(
 624         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
 625         GetId());
 626     cmdEvent.SetEventObject(this);
 627     cmdEvent.SetPosition(m_caretPosition+1);
 628
 629     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 630     {
 631         SelectWord(GetCaretPosition()+1);
 632     }
 633 }
 634
 635 /// Middle-click
 636 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 637 {
 638     wxRichTextEvent cmdEvent(
 639         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
 640         GetId());
 641     cmdEvent.SetEventObject(this);
 642     cmdEvent.SetPosition(m_caretPosition+1);
 643
 644     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 645         event.Skip();
 646 }
 647
 648 /// Key press
 649 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 650 {
 651     int flags = 0;
 652     if (event.CmdDown())
 653         flags |= wxRICHTEXT_CTRL_DOWN;
 654     if (event.ShiftDown())
 655         flags |= wxRICHTEXT_SHIFT_DOWN;
 656     if (event.AltDown())
 657         flags |= wxRICHTEXT_ALT_DOWN;
 658
 659     if (event.GetKeyCode() == WXK_LEFT ||
 660         event.GetKeyCode() == WXK_RIGHT ||
 661         event.GetKeyCode() == WXK_UP ||
 662         event.GetKeyCode() == WXK_DOWN ||
 663         event.GetKeyCode() == WXK_HOME ||
 664         event.GetKeyCode() == WXK_PAGEUP ||
 665         event.GetKeyCode() == WXK_PAGEDOWN ||
 666         event.GetKeyCode() == WXK_END ||
 667
 668         event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 669         event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 670         event.GetKeyCode() == WXK_NUMPAD_UP ||
 671         event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 672         event.GetKeyCode() == WXK_NUMPAD_HOME ||
 673         event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 674         event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 675         event.GetKeyCode() == WXK_NUMPAD_END)
 676     {
 677         KeyboardNavigate(event.GetKeyCode(), flags);
 678         return;
 679     }
 680
 681     // all the other keys modify the controls contents which shouldn't be
 682     // possible if we're read-only
 683     if ( !IsEditable() )
 684     {
 685         event.Skip();
 686         return;
 687     }
 688
 689     if (event.GetKeyCode() == WXK_RETURN)
 690     {
 691         BeginBatchUndo(_("Insert Text"));
 692
 693         long newPos = m_caretPosition;
 694
 695         DeleteSelectedContent(& newPos);
 696
 697         if (event.ShiftDown())
 698         {
 699             wxString text;
 700             text = wxRichTextLineBreakChar;
 701             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 702         }
 703         else
 704             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE|wxRICHTEXT_INSERT_INTERACTIVE);
 705
 706         EndBatchUndo();
 707         SetDefaultStyleToCursorStyle();
 708
 709         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 710
 711         wxRichTextEvent cmdEvent(
 712             wxEVT_COMMAND_RICHTEXT_RETURN,
 713             GetId());
 714         cmdEvent.SetEventObject(this);
 715         cmdEvent.SetFlags(flags);
 716         cmdEvent.SetPosition(newPos+1);
 717
 718         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 719         {
 720             // Generate conventional event
 721             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 722             InitCommandEvent(textEvent);
 723
 724             GetEventHandler()->ProcessEvent(textEvent);
 725         }
 726         Update();
 727     }
 728     else if (event.GetKeyCode() == WXK_BACK)
 729     {
 730         BeginBatchUndo(_("Delete Text"));
 731
 732         // Submit range in character positions, which are greater than caret positions,
 733         // so subtract 1 for deleted character and add 1 for conversion to character position.
 734         if (m_caretPosition > -1 && !HasSelection())
 735         {
 736             bool processed = false;
 737             if (event.CmdDown())
 738             {
 739                 long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 740                 if (pos != -1 && (pos < m_caretPosition))
 741                 {
 742                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, m_caretPosition), this);
 743                     processed = true;
 744                 }
 745             }
 746
 747             if (!processed)
 748                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition, m_caretPosition), this);
 749         }
 750         else
 751             DeleteSelectedContent();
 752
 753         EndBatchUndo();
 754
 755         if (GetLastPosition() == -1)
 756         {
 757             GetBuffer().Reset();
 758
 759             m_caretPosition = -1;
 760             PositionCaret();
 761             SetDefaultStyleToCursorStyle();
 762         }
 763
 764         ScrollIntoView(m_caretPosition, WXK_LEFT);
 765
 766         wxRichTextEvent cmdEvent(
 767             wxEVT_COMMAND_RICHTEXT_DELETE,
 768             GetId());
 769         cmdEvent.SetEventObject(this);
 770         cmdEvent.SetFlags(flags);
 771         cmdEvent.SetPosition(m_caretPosition+1);
 772         GetEventHandler()->ProcessEvent(cmdEvent);
 773
 774         Update();
 775     }
 776     else if (event.GetKeyCode() == WXK_DELETE)
 777     {
 778         BeginBatchUndo(_("Delete Text"));
 779
 780         // Submit range in character positions, which are greater than caret positions,
 781         if (m_caretPosition < GetBuffer().GetRange().GetEnd()+1 && !HasSelection())
 782         {
 783             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition+1, m_caretPosition+1), this);
 784         }
 785         else
 786             DeleteSelectedContent();
 787
 788         EndBatchUndo();
 789
 790         if (GetLastPosition() == -1)
 791         {
 792             GetBuffer().Reset();
 793
 794             m_caretPosition = -1;
 795             PositionCaret();
 796             SetDefaultStyleToCursorStyle();
 797         }
 798
 799         wxRichTextEvent cmdEvent(
 800             wxEVT_COMMAND_RICHTEXT_DELETE,
 801             GetId());
 802         cmdEvent.SetEventObject(this);
 803         cmdEvent.SetFlags(flags);
 804         cmdEvent.SetPosition(m_caretPosition+1);
 805         GetEventHandler()->ProcessEvent(cmdEvent);
 806
 807         Update();
 808     }
 809     else
 810     {
 811         long keycode = event.GetKeyCode();
 812         switch ( keycode )
 813         {
 814             case WXK_ESCAPE:
 815             case WXK_DELETE:
 816             case WXK_START:
 817             case WXK_LBUTTON:
 818             case WXK_RBUTTON:
 819             case WXK_CANCEL:
 820             case WXK_MBUTTON:
 821             case WXK_CLEAR:
 822             case WXK_SHIFT:
 823             case WXK_ALT:
 824             case WXK_CONTROL:
 825             case WXK_MENU:
 826             case WXK_PAUSE:
 827             case WXK_CAPITAL:
 828             case WXK_END:
 829             case WXK_HOME:
 830             case WXK_LEFT:
 831             case WXK_UP:
 832             case WXK_RIGHT:
 833             case WXK_DOWN:
 834             case WXK_SELECT:
 835             case WXK_PRINT:
 836             case WXK_EXECUTE:
 837             case WXK_SNAPSHOT:
 838             case WXK_INSERT:
 839             case WXK_HELP:
 840             case WXK_NUMPAD0:
 841             case WXK_NUMPAD1:
 842             case WXK_NUMPAD2:
 843             case WXK_NUMPAD3:
 844             case WXK_NUMPAD4:
 845             case WXK_NUMPAD5:
 846             case WXK_NUMPAD6:
 847             case WXK_NUMPAD7:
 848             case WXK_NUMPAD8:
 849             case WXK_NUMPAD9:
 850             case WXK_MULTIPLY:
 851             case WXK_ADD:
 852             case WXK_SEPARATOR:
 853             case WXK_SUBTRACT:
 854             case WXK_DECIMAL:
 855             case WXK_DIVIDE:
 856             case WXK_F1:
 857             case WXK_F2:
 858             case WXK_F3:
 859             case WXK_F4:
 860             case WXK_F5:
 861             case WXK_F6:
 862             case WXK_F7:
 863             case WXK_F8:
 864             case WXK_F9:
 865             case WXK_F10:
 866             case WXK_F11:
 867             case WXK_F12:
 868             case WXK_F13:
 869             case WXK_F14:
 870             case WXK_F15:
 871             case WXK_F16:
 872             case WXK_F17:
 873             case WXK_F18:
 874             case WXK_F19:
 875             case WXK_F20:
 876             case WXK_F21:
 877             case WXK_F22:
 878             case WXK_F23:
 879             case WXK_F24:
 880             case WXK_NUMLOCK:
 881             case WXK_SCROLL:
 882             case WXK_PAGEUP:
 883             case WXK_PAGEDOWN:
 884             case WXK_NUMPAD_SPACE:
 885             case WXK_NUMPAD_TAB:
 886             case WXK_NUMPAD_ENTER:
 887             case WXK_NUMPAD_F1:
 888             case WXK_NUMPAD_F2:
 889             case WXK_NUMPAD_F3:
 890             case WXK_NUMPAD_F4:
 891             case WXK_NUMPAD_HOME:
 892             case WXK_NUMPAD_LEFT:
 893             case WXK_NUMPAD_UP:
 894             case WXK_NUMPAD_RIGHT:
 895             case WXK_NUMPAD_DOWN:
 896             case WXK_NUMPAD_PAGEUP:
 897             case WXK_NUMPAD_PAGEDOWN:
 898             case WXK_NUMPAD_END:
 899             case WXK_NUMPAD_BEGIN:
 900             case WXK_NUMPAD_INSERT:
 901             case WXK_NUMPAD_DELETE:
 902             case WXK_NUMPAD_EQUAL:
 903             case WXK_NUMPAD_MULTIPLY:
 904             case WXK_NUMPAD_ADD:
 905             case WXK_NUMPAD_SEPARATOR:
 906             case WXK_NUMPAD_SUBTRACT:
 907             case WXK_NUMPAD_DECIMAL:
 908             case WXK_WINDOWS_LEFT:
 909             {
 910                 event.Skip();
 911                 return;
 912             }
 913
 914             default:
 915             {
 916                 if (event.CmdDown() || event.AltDown())
 917                 {
 918                     event.Skip();
 919                     return;
 920                 }
 921
 922                 wxRichTextEvent cmdEvent(
 923                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
 924                     GetId());
 925                 cmdEvent.SetEventObject(this);
 926                 cmdEvent.SetFlags(flags);
 927 #if wxUSE_UNICODE
 928                 cmdEvent.SetCharacter(event.GetUnicodeKey());
 929 #else
 930                 cmdEvent.SetCharacter((wxChar) keycode);
 931 #endif
 932                 cmdEvent.SetPosition(m_caretPosition+1);
 933
 934                 if (keycode == wxT('\t'))
 935                 {
 936                     // See if we need to promote or demote the selection or paragraph at the cursor
 937                     // position, instead of inserting a tab.
 938                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
 939                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
 940                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
 941                     {
 942                         wxRichTextRange range;
 943                         if (HasSelection())
 944                             range = GetSelectionRange();
 945                         else
 946                             range = para->GetRange().FromInternal();
 947
 948                         int promoteBy = event.ShiftDown() ? 1 : -1;
 949
 950                         PromoteList(promoteBy, range, NULL);
 951
 952                         GetEventHandler()->ProcessEvent(cmdEvent);
 953
 954                         return;
 955                     }
 956                 }
 957
 958                 BeginBatchUndo(_("Insert Text"));
 959
 960                 long newPos = m_caretPosition;
 961                 DeleteSelectedContent(& newPos);
 962
 963 #if wxUSE_UNICODE
 964                 wxString str = event.GetUnicodeKey();
 965 #else
 966                 wxString str = (wxChar) event.GetKeyCode();
 967 #endif
 968                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
 969
 970                 EndBatchUndo();
 971
 972                 SetDefaultStyleToCursorStyle();
 973                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
 974
 975                 GetEventHandler()->ProcessEvent(cmdEvent);
 976
 977                 Update();
 978             }
 979         }
 980     }
 981 }
 982
 983 /// Delete content if there is a selection, e.g. when pressing a key.
 984 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
 985 {
 986     if (HasSelection())
 987     {
 988         long pos = m_selectionRange.GetStart();
 989         GetBuffer().DeleteRangeWithUndo(m_selectionRange, this);
 990         m_selectionRange.SetRange(-2, -2);
 991
 992         if (newPos)
 993             *newPos = pos-1;
 994         return true;
 995     }
 996     else
 997         return false;
 998 }
 999
1000 /// Keyboard navigation
1001
1002 /*
1003
1004 Left:       left one character
1005 Right:      right one character
1006 Up:         up one line
1007 Down:       down one line
1008 Ctrl-Left:  left one word
1009 Ctrl-Right: right one word
1010 Ctrl-Up:    previous paragraph start
1011 Ctrl-Down:  next start of paragraph
1012 Home:       start of line
1013 End:        end of line
1014 Ctrl-Home:  start of document
1015 Ctrl-End:   end of document
1016 Page-Up:    Up a screen
1017 Page-Down:  Down a screen
1018
1019 Maybe:
1020
1021 Ctrl-Alt-PgUp: Start of window
1022 Ctrl-Alt-PgDn: End of window
1023 F8:         Start selection mode
1024 Esc:        End selection mode
1025
1026 Adding Shift does the above but starts/extends selection.
1027
1028
1029  */
1030
1031 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
1032 {
1033     bool success = false;
1034
1035     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
1036     {
1037         if (flags & wxRICHTEXT_CTRL_DOWN)
1038             success = WordRight(1, flags);
1039         else
1040             success = MoveRight(1, flags);
1041     }
1042     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
1043     {
1044         if (flags & wxRICHTEXT_CTRL_DOWN)
1045             success = WordLeft(1, flags);
1046         else
1047             success = MoveLeft(1, flags);
1048     }
1049     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
1050     {
1051         if (flags & wxRICHTEXT_CTRL_DOWN)
1052             success = MoveToParagraphStart(flags);
1053         else
1054             success = MoveUp(1, flags);
1055     }
1056     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
1057     {
1058         if (flags & wxRICHTEXT_CTRL_DOWN)
1059             success = MoveToParagraphEnd(flags);
1060         else
1061             success = MoveDown(1, flags);
1062     }
1063     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
1064     {
1065         success = PageUp(1, flags);
1066     }
1067     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1068     {
1069         success = PageDown(1, flags);
1070     }
1071     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
1072     {
1073         if (flags & wxRICHTEXT_CTRL_DOWN)
1074             success = MoveHome(flags);
1075         else
1076             success = MoveToLineStart(flags);
1077     }
1078     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
1079     {
1080         if (flags & wxRICHTEXT_CTRL_DOWN)
1081             success = MoveEnd(flags);
1082         else
1083             success = MoveToLineEnd(flags);
1084     }
1085
1086     if (success)
1087     {
1088         ScrollIntoView(m_caretPosition, keyCode);
1089         SetDefaultStyleToCursorStyle();
1090     }
1091
1092     return success;
1093 }
1094
1095 /// Extend the selection. Selections are in caret positions.
1096 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
1097 {
1098     if (flags & wxRICHTEXT_SHIFT_DOWN)
1099     {
1100         wxRichTextRange oldSelection = m_selectionRange;
1101
1102         // If not currently selecting, start selecting
1103         if (m_selectionRange.GetStart() == -2)
1104         {
1105             m_selectionAnchor = oldPos;
1106
1107             if (oldPos > newPos)
1108                 m_selectionRange.SetRange(newPos+1, oldPos);
1109             else
1110                 m_selectionRange.SetRange(oldPos+1, newPos);
1111         }
1112         else
1113         {
1114             // Always ensure that the selection range start is greater than
1115             // the end.
1116             if (newPos > m_selectionAnchor)
1117                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
1118             else
1119                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
1120         }
1121
1122         RefreshForSelectionChange(oldSelection, m_selectionRange);
1123
1124         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
1125         {
1126             wxLogDebug(wxT("Strange selection range"));
1127         }
1128
1129         return true;
1130     }
1131     else
1132         return false;
1133 }
1134
1135 /// Scroll into view, returning true if we scrolled.
1136 /// This takes a _caret_ position.
1137 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1138 {
1139     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1140
1141     if (!line)
1142         return false;
1143
1144     int ppuX, ppuY;
1145     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1146
1147     int startXUnits, startYUnits;
1148     GetViewStart(& startXUnits, & startYUnits);
1149     int startY = startYUnits * ppuY;
1150
1151     int sx = 0, sy = 0;
1152     GetVirtualSize(& sx, & sy);
1153     int sxUnits = 0;
1154     int syUnits = 0;
1155     if (ppuY != 0)
1156         syUnits = sy/ppuY;
1157
1158     wxRect rect = line->GetRect();
1159
1160     bool scrolled = false;
1161
1162     wxSize clientSize = GetClientSize();
1163
1164     // Going down
1165     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1166         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1167         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1168         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1169     {
1170         if ((rect.y + rect.height) > (clientSize.y + startY))
1171         {
1172             // Make it scroll so this item is at the bottom
1173             // of the window
1174             int y = rect.y - (clientSize.y - rect.height);
1175             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1176
1177             // If we're still off the screen, scroll another line down
1178             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1179                 yUnits ++;
1180
1181             if (startYUnits != yUnits)
1182             {
1183                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1184                 scrolled = true;
1185             }
1186         }
1187         else if (rect.y < startY)
1188         {
1189             // Make it scroll so this item is at the top
1190             // of the window
1191             int y = rect.y ;
1192             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1193
1194             if (startYUnits != yUnits)
1195             {
1196                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1197                 scrolled = true;
1198             }
1199         }
1200     }
1201     // Going up
1202     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1203              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1204              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1205              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1206     {
1207         if (rect.y < startY)
1208         {
1209             // Make it scroll so this item is at the top
1210             // of the window
1211             int y = rect.y ;
1212             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1213
1214             if (startYUnits != yUnits)
1215             {
1216                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1217                 scrolled = true;
1218             }
1219         }
1220         else if ((rect.y + rect.height) > (clientSize.y + startY))
1221         {
1222             // Make it scroll so this item is at the bottom
1223             // of the window
1224             int y = rect.y - (clientSize.y - rect.height);
1225             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1226
1227             // If we're still off the screen, scroll another line down
1228             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1229                 yUnits ++;
1230
1231             if (startYUnits != yUnits)
1232             {
1233                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1234                 scrolled = true;
1235             }
1236         }
1237     }
1238
1239 #if !wxRICHTEXT_USE_OWN_CARET
1240     if (scrolled)
1241 #endif
1242         PositionCaret();
1243
1244     return scrolled;
1245 }
1246
1247 /// Is the given position visible on the screen?
1248 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1249 {
1250     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1251
1252     if (!line)
1253         return false;
1254
1255     int ppuX, ppuY;
1256     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1257
1258     int startX, startY;
1259     GetViewStart(& startX, & startY);
1260     startX = 0;
1261     startY = startY * ppuY;
1262
1263     wxRect rect = line->GetRect();
1264     wxSize clientSize = GetClientSize();
1265
1266     return (rect.GetBottom() > startY) && (rect.GetTop() < (startY + clientSize.y));
1267 }
1268
1269 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1270 {
1271     m_caretPosition = position;
1272     m_caretAtLineStart = showAtLineStart;
1273 }
1274
1275 /// Move caret one visual step forward: this may mean setting a flag
1276 /// and keeping the same position if we're going from the end of one line
1277 /// to the start of the next, which may be the exact same caret position.
1278 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1279 {
1280     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1281
1282     // Only do the check if we're not at the end of the paragraph (where things work OK
1283     // anyway)
1284     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1285     {
1286         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1287
1288         if (line)
1289         {
1290             wxRichTextRange lineRange = line->GetAbsoluteRange();
1291
1292             // We're at the end of a line. See whether we need to
1293             // stay at the same actual caret position but change visual
1294             // position, or not.
1295             if (oldPosition == lineRange.GetEnd())
1296             {
1297                 if (m_caretAtLineStart)
1298                 {
1299                     // We're already at the start of the line, so actually move on now.
1300                     m_caretPosition = oldPosition + 1;
1301                     m_caretAtLineStart = false;
1302                 }
1303                 else
1304                 {
1305                     // We're showing at the end of the line, so keep to
1306                     // the same position but indicate that we're to show
1307                     // at the start of the next line.
1308                     m_caretPosition = oldPosition;
1309                     m_caretAtLineStart = true;
1310                 }
1311                 SetDefaultStyleToCursorStyle();
1312                 return;
1313             }
1314         }
1315     }
1316     m_caretPosition ++;
1317     SetDefaultStyleToCursorStyle();
1318 }
1319
1320 /// Move caret one visual step backward: this may mean setting a flag
1321 /// and keeping the same position if we're going from the end of one line
1322 /// to the start of the next, which may be the exact same caret position.
1323 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1324 {
1325     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1326
1327     // Only do the check if we're not at the start of the paragraph (where things work OK
1328     // anyway)
1329     if (para && (oldPosition != para->GetRange().GetStart()))
1330     {
1331         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1332
1333         if (line)
1334         {
1335             wxRichTextRange lineRange = line->GetAbsoluteRange();
1336
1337             // We're at the start of a line. See whether we need to
1338             // stay at the same actual caret position but change visual
1339             // position, or not.
1340             if (oldPosition == lineRange.GetStart())
1341             {
1342                 m_caretPosition = oldPosition-1;
1343                 m_caretAtLineStart = true;
1344                 return;
1345             }
1346             else if (oldPosition == lineRange.GetEnd())
1347             {
1348                 if (m_caretAtLineStart)
1349                 {
1350                     // We're at the start of the line, so keep the same caret position
1351                     // but clear the start-of-line flag.
1352                     m_caretPosition = oldPosition;
1353                     m_caretAtLineStart = false;
1354                 }
1355                 else
1356                 {
1357                     // We're showing at the end of the line, so go back
1358                     // to the previous character position.
1359                     m_caretPosition = oldPosition - 1;
1360                 }
1361                 SetDefaultStyleToCursorStyle();
1362                 return;
1363             }
1364         }
1365     }
1366     m_caretPosition --;
1367     SetDefaultStyleToCursorStyle();
1368 }
1369
1370 /// Move right
1371 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1372 {
1373     long endPos = GetBuffer().GetRange().GetEnd();
1374
1375     if (m_caretPosition + noPositions < endPos)
1376     {
1377         long oldPos = m_caretPosition;
1378         long newPos = m_caretPosition + noPositions;
1379
1380         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1381         if (!extendSel)
1382             SelectNone();
1383
1384         // Determine by looking at oldPos and m_caretPosition whether
1385         // we moved from the end of a line to the start of the next line, in which case
1386         // we want to adjust the caret position such that it is positioned at the
1387         // start of the next line, rather than jumping past the first character of the
1388         // line.
1389         if (noPositions == 1 && !extendSel)
1390             MoveCaretForward(oldPos);
1391         else
1392             SetCaretPosition(newPos);
1393
1394         PositionCaret();
1395         SetDefaultStyleToCursorStyle();
1396
1397         return true;
1398     }
1399     else
1400         return false;
1401 }
1402
1403 /// Move left
1404 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1405 {
1406     long startPos = -1;
1407
1408     if (m_caretPosition > startPos - noPositions + 1)
1409     {
1410         long oldPos = m_caretPosition;
1411         long newPos = m_caretPosition - noPositions;
1412         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1413         if (!extendSel)
1414             SelectNone();
1415
1416         if (noPositions == 1 && !extendSel)
1417             MoveCaretBack(oldPos);
1418         else
1419             SetCaretPosition(newPos);
1420
1421         PositionCaret();
1422         SetDefaultStyleToCursorStyle();
1423
1424         return true;
1425     }
1426     else
1427         return false;
1428 }
1429
1430 /// Move up
1431 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1432 {
1433     return MoveDown(- noLines, flags);
1434 }
1435
1436 /// Move up
1437 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1438 {
1439     if (!GetCaret())
1440         return false;
1441
1442     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1443     wxPoint pt = GetCaret()->GetPosition();
1444     long newLine = lineNumber + noLines;
1445
1446     if (lineNumber != -1)
1447     {
1448         if (noLines > 0)
1449         {
1450             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1451
1452             if (newLine > lastLine)
1453                 return false;
1454         }
1455         else
1456         {
1457             if (newLine < 0)
1458                 return false;
1459         }
1460     }
1461
1462     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1463     if (lineObj)
1464     {
1465         pt.y = lineObj->GetAbsolutePosition().y + 2;
1466     }
1467     else
1468         return false;
1469
1470     long newPos = 0;
1471     wxClientDC dc(this);
1472     PrepareDC(dc);
1473     dc.SetFont(GetFont());
1474
1475     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1476
1477     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1478     {
1479         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1480         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1481         // so we view the caret at the start of the line.
1482         bool caretLineStart = false;
1483         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1484         {
1485             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1486             wxRichTextRange lineRange;
1487             if (thisLine)
1488                 lineRange = thisLine->GetAbsoluteRange();
1489
1490             if (thisLine && (newPos-1) == lineRange.GetEnd())
1491             {
1492                 newPos --;
1493                 caretLineStart = true;
1494             }
1495             else
1496             {
1497                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1498                 if (para && para->GetRange().GetStart() == newPos)
1499                     newPos --;
1500             }
1501         }
1502
1503         long newSelEnd = newPos;
1504
1505         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1506         if (!extendSel)
1507             SelectNone();
1508
1509         SetCaretPosition(newPos, caretLineStart);
1510         PositionCaret();
1511         SetDefaultStyleToCursorStyle();
1512
1513         return true;
1514     }
1515
1516     return false;
1517 }
1518
1519 /// Move to the end of the paragraph
1520 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1521 {
1522     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1523     if (para)
1524     {
1525         long newPos = para->GetRange().GetEnd() - 1;
1526         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1527         if (!extendSel)
1528             SelectNone();
1529
1530         SetCaretPosition(newPos);
1531         PositionCaret();
1532         SetDefaultStyleToCursorStyle();
1533
1534         return true;
1535     }
1536
1537     return false;
1538 }
1539
1540 /// Move to the start of the paragraph
1541 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1542 {
1543     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1544     if (para)
1545     {
1546         long newPos = para->GetRange().GetStart() - 1;
1547         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1548         if (!extendSel)
1549             SelectNone();
1550
1551         SetCaretPosition(newPos);
1552         PositionCaret();
1553         SetDefaultStyleToCursorStyle();
1554
1555         return true;
1556     }
1557
1558     return false;
1559 }
1560
1561 /// Move to the end of the line
1562 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1563 {
1564     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1565
1566     if (line)
1567     {
1568         wxRichTextRange lineRange = line->GetAbsoluteRange();
1569         long newPos = lineRange.GetEnd();
1570         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1571         if (!extendSel)
1572             SelectNone();
1573
1574         SetCaretPosition(newPos);
1575         PositionCaret();
1576         SetDefaultStyleToCursorStyle();
1577
1578         return true;
1579     }
1580
1581     return false;
1582 }
1583
1584 /// Move to the start of the line
1585 bool wxRichTextCtrl::MoveToLineStart(int flags)
1586 {
1587     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1588     if (line)
1589     {
1590         wxRichTextRange lineRange = line->GetAbsoluteRange();
1591         long newPos = lineRange.GetStart()-1;
1592
1593         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1594         if (!extendSel)
1595             SelectNone();
1596
1597         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1598
1599         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1600         PositionCaret();
1601         SetDefaultStyleToCursorStyle();
1602
1603         return true;
1604     }
1605
1606     return false;
1607 }
1608
1609 /// Move to the start of the buffer
1610 bool wxRichTextCtrl::MoveHome(int flags)
1611 {
1612     if (m_caretPosition != -1)
1613     {
1614         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1615         if (!extendSel)
1616             SelectNone();
1617
1618         SetCaretPosition(-1);
1619         PositionCaret();
1620         SetDefaultStyleToCursorStyle();
1621
1622         return true;
1623     }
1624     else
1625         return false;
1626 }
1627
1628 /// Move to the end of the buffer
1629 bool wxRichTextCtrl::MoveEnd(int flags)
1630 {
1631     long endPos = GetBuffer().GetRange().GetEnd()-1;
1632
1633     if (m_caretPosition != endPos)
1634     {
1635         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1636         if (!extendSel)
1637             SelectNone();
1638
1639         SetCaretPosition(endPos);
1640         PositionCaret();
1641         SetDefaultStyleToCursorStyle();
1642
1643         return true;
1644     }
1645     else
1646         return false;
1647 }
1648
1649 /// Move noPages pages up
1650 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1651 {
1652     return PageDown(- noPages, flags);
1653 }
1654
1655 /// Move noPages pages down
1656 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1657 {
1658     // Calculate which line occurs noPages * screen height further down.
1659     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1660     if (line)
1661     {
1662         wxSize clientSize = GetClientSize();
1663         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1664
1665         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1666         if (newLine)
1667         {
1668             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1669             long pos = lineRange.GetStart()-1;
1670             if (pos != m_caretPosition)
1671             {
1672                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1673
1674                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1675                 if (!extendSel)
1676                     SelectNone();
1677
1678                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1679                 PositionCaret();
1680                 SetDefaultStyleToCursorStyle();
1681
1682                 return true;
1683             }
1684         }
1685     }
1686
1687     return false;
1688 }
1689
1690 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1691 {
1692     return str == wxT(" ") || str == wxT("\t");
1693 }
1694
1695 // Finds the caret position for the next word
1696 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1697 {
1698     long endPos = GetBuffer().GetRange().GetEnd();
1699
1700     if (direction > 0)
1701     {
1702         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1703
1704         // First skip current text to space
1705         while (i < endPos && i > -1)
1706         {
1707             // i is in character, not caret positions
1708             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1709             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1710             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1711             {
1712                 break;
1713             }
1714             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1715                 i += direction;
1716             else
1717             {
1718                 break;
1719             }
1720         }
1721         while (i < endPos && i > -1)
1722         {
1723             // i is in character, not caret positions
1724             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1725             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1726             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1727                 return wxMax(-1, i);
1728
1729             if (text.empty()) // End of paragraph, or maybe an image
1730                 return wxMax(-1, i - 1);
1731             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1732                 i += direction;
1733             else
1734             {
1735                 // Convert to caret position
1736                 return wxMax(-1, i - 1);
1737             }
1738         }
1739         if (i >= endPos)
1740             return endPos-1;
1741         return i-1;
1742     }
1743     else
1744     {
1745         long i = m_caretPosition;
1746
1747         // First skip white space
1748         while (i < endPos && i > -1)
1749         {
1750             // i is in character, not caret positions
1751             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1752             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1753
1754             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1755                 break;
1756             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1757                 i += direction;
1758             else
1759                 break;
1760         }
1761         // Next skip current text to space
1762         while (i < endPos && i > -1)
1763         {
1764             // i is in character, not caret positions
1765             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1766             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1767             if (line && line->GetAbsoluteRange().GetStart() == i)
1768                 return i-1;
1769
1770             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1771                 i += direction;
1772             else
1773             {
1774                 return i;
1775             }
1776         }
1777         if (i < -1)
1778             return -1;
1779         return i;
1780     }
1781 }
1782
1783 /// Move n words left
1784 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1785 {
1786     long pos = FindNextWordPosition(-1);
1787     if (pos != m_caretPosition)
1788     {
1789         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1790
1791         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1792         if (!extendSel)
1793             SelectNone();
1794
1795         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1796         PositionCaret();
1797         SetDefaultStyleToCursorStyle();
1798
1799         return true;
1800     }
1801
1802     return false;
1803 }
1804
1805 /// Move n words right
1806 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1807 {
1808     long pos = FindNextWordPosition(1);
1809     if (pos != m_caretPosition)
1810     {
1811         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1812
1813         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1814         if (!extendSel)
1815             SelectNone();
1816
1817         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1818         PositionCaret();
1819         SetDefaultStyleToCursorStyle();
1820
1821         return true;
1822     }
1823
1824     return false;
1825 }
1826
1827 /// Sizing
1828 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1829 {
1830     // Only do sizing optimization for large buffers
1831     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1832     {
1833         m_fullLayoutRequired = true;
1834         m_fullLayoutTime = wxGetLocalTimeMillis();
1835         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1836         LayoutContent(true /* onlyVisibleRect */);
1837     }
1838     else
1839         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1840
1841 #if wxRICHTEXT_BUFFERED_PAINTING
1842     RecreateBuffer();
1843 #endif
1844
1845     event.Skip();
1846 }
1847
1848
1849 /// Idle-time processing
1850 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1851 {
1852 #if wxRICHTEXT_USE_OWN_CARET
1853     if (((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
1854     {
1855         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate(false);
1856         PositionCaret();
1857         GetCaret()->Show();
1858     }
1859 #endif
1860
1861     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1862
1863     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1864     {
1865         m_fullLayoutRequired = false;
1866         m_fullLayoutTime = 0;
1867         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1868         ShowPosition(m_fullLayoutSavedPosition);
1869         Refresh(false);
1870     }
1871
1872     if (m_caretPositionForDefaultStyle != -2)
1873     {
1874         // If the caret position has changed, no longer reflect the default style
1875         // in the UI.
1876         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1877             m_caretPositionForDefaultStyle = -2;
1878     }
1879
1880     event.Skip();
1881 }
1882
1883 /// Scrolling
1884 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1885 {
1886 #if wxRICHTEXT_USE_OWN_CARET
1887     if (!((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
1888     {
1889         GetCaret()->Hide();
1890         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate();
1891     }
1892 #endif
1893
1894     event.Skip();
1895 }
1896
1897 /// Set up scrollbars, e.g. after a resize
1898 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1899 {
1900     if (IsFrozen())
1901         return;
1902
1903     if (GetBuffer().IsEmpty())
1904     {
1905         SetScrollbars(0, 0, 0, 0, 0, 0);
1906         return;
1907     }
1908
1909     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1910     // of pixels. See e.g. wxVScrolledWindow for ideas.
1911     int pixelsPerUnit = 5;
1912     wxSize clientSize = GetClientSize();
1913
1914     int maxHeight = GetBuffer().GetCachedSize().y;
1915
1916     // Round up so we have at least maxHeight pixels
1917     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1918
1919     int startX = 0, startY = 0;
1920     if (!atTop)
1921         GetViewStart(& startX, & startY);
1922
1923     int maxPositionX = 0;
1924     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
1925
1926     int newStartX = wxMin(maxPositionX, startX);
1927     int newStartY = wxMin(maxPositionY, startY);
1928
1929     int oldPPUX, oldPPUY;
1930     int oldStartX, oldStartY;
1931     int oldVirtualSizeX = 0, oldVirtualSizeY = 0;
1932     GetScrollPixelsPerUnit(& oldPPUX, & oldPPUY);
1933     GetViewStart(& oldStartX, & oldStartY);
1934     GetVirtualSize(& oldVirtualSizeX, & oldVirtualSizeY);
1935     if (oldPPUY > 0)
1936         oldVirtualSizeY /= oldPPUY;
1937
1938     if (oldPPUX == 0 && oldPPUY == pixelsPerUnit && oldVirtualSizeY == unitsY && oldStartX == newStartX && oldStartY == newStartY)
1939         return;
1940
1941     // Don't set scrollbars if there were none before, and there will be none now.
1942     if (oldPPUY != 0 && (oldVirtualSizeY < clientSize.y) && (unitsY*pixelsPerUnit < clientSize.y))
1943         return;
1944
1945     // Move to previous scroll position if
1946     // possible
1947     SetScrollbars(0, pixelsPerUnit, 0, unitsY, newStartX, newStartY);
1948 }
1949
1950 /// Paint the background
1951 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1952 {
1953     wxColour backgroundColour = GetBackgroundColour();
1954     if (!backgroundColour.Ok())
1955         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1956
1957     // Clear the background
1958     dc.SetBrush(wxBrush(backgroundColour));
1959     dc.SetPen(*wxTRANSPARENT_PEN);
1960     wxRect windowRect(GetClientSize());
1961     windowRect.x -= 2; windowRect.y -= 2;
1962     windowRect.width += 4; windowRect.height += 4;
1963
1964     // We need to shift the rectangle to take into account
1965     // scrolling. Converting device to logical coordinates.
1966     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1967     dc.DrawRectangle(windowRect);
1968 }
1969
1970 #if wxRICHTEXT_BUFFERED_PAINTING
1971 /// Recreate buffer bitmap if necessary
1972 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1973 {
1974     wxSize sz = size;
1975     if (sz == wxDefaultSize)
1976         sz = GetClientSize();
1977
1978     if (sz.x < 1 || sz.y < 1)
1979         return false;
1980
1981     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1982         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1983     return m_bufferBitmap.Ok();
1984 }
1985 #endif
1986
1987 // ----------------------------------------------------------------------------
1988 // file IO functions
1989 // ----------------------------------------------------------------------------
1990
1991 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
1992 {
1993     bool success = GetBuffer().LoadFile(filename, (wxRichTextFileType)fileType);
1994     if (success)
1995         m_filename = filename;
1996
1997     DiscardEdits();
1998     SetInsertionPoint(0);
1999     LayoutContent();
2000     PositionCaret();
2001     SetupScrollbars(true);
2002     Refresh(false);
2003     wxTextCtrl::SendTextUpdatedEvent(this);
2004
2005     if (success)
2006         return true;
2007     else
2008     {
2009         wxLogError(_("File couldn't be loaded."));
2010
2011         return false;
2012     }
2013 }
2014
2015 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
2016 {
2017     if (GetBuffer().SaveFile(filename, (wxRichTextFileType)fileType))
2018     {
2019         m_filename = filename;
2020
2021         DiscardEdits();
2022
2023         return true;
2024     }
2025
2026     wxLogError(_("The text couldn't be saved."));
2027
2028     return false;
2029 }
2030
2031 // ----------------------------------------------------------------------------
2032 // wxRichTextCtrl specific functionality
2033 // ----------------------------------------------------------------------------
2034
2035 /// Add a new paragraph of text to the end of the buffer
2036 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
2037 {
2038     wxRichTextRange range = GetBuffer().AddParagraph(text);
2039     LayoutContent();
2040     return range;
2041 }
2042
2043 /// Add an image
2044 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
2045 {
2046     wxRichTextRange range = GetBuffer().AddImage(image);
2047     LayoutContent();
2048     return range;
2049 }
2050
2051 // ----------------------------------------------------------------------------
2052 // selection and ranges
2053 // ----------------------------------------------------------------------------
2054
2055 void wxRichTextCtrl::SelectAll()
2056 {
2057     SetSelection(0, GetLastPosition()+1);
2058     m_selectionAnchor = -1;
2059 }
2060
2061 /// Select none
2062 void wxRichTextCtrl::SelectNone()
2063 {
2064     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
2065     {
2066         wxRichTextRange oldSelection = m_selectionRange;
2067
2068         m_selectionRange = wxRichTextRange(-2, -2);
2069
2070         RefreshForSelectionChange(oldSelection, m_selectionRange);
2071     }
2072     m_selectionAnchor = -2;
2073 }
2074
2075 static bool wxIsWordDelimiter(const wxString& text)
2076 {
2077     return !text.IsEmpty() && !wxIsalnum(text[0]);
2078 }
2079
2080 /// Select the word at the given character position
2081 bool wxRichTextCtrl::SelectWord(long position)
2082 {
2083     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
2084         return false;
2085
2086     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
2087     if (!para)
2088         return false;
2089
2090     if (position == para->GetRange().GetEnd())
2091         position --;
2092
2093     long positionStart = position;
2094     long positionEnd = position;
2095
2096     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
2097     {
2098         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
2099         if (wxIsWordDelimiter(text))
2100         {
2101             positionStart ++;
2102             break;
2103         }
2104     }
2105     if (positionStart < para->GetRange().GetStart())
2106         positionStart = para->GetRange().GetStart();
2107
2108     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
2109     {
2110         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
2111         if (wxIsWordDelimiter(text))
2112         {
2113             positionEnd --;
2114             break;
2115         }
2116     }
2117     if (positionEnd >= para->GetRange().GetEnd())
2118         positionEnd = para->GetRange().GetEnd();
2119
2120     if (positionEnd < positionStart)
2121         return false;
2122
2123     SetSelection(positionStart, positionEnd+1);
2124
2125     if (positionStart >= 0)
2126     {
2127         MoveCaret(positionStart-1, true);
2128         SetDefaultStyleToCursorStyle();
2129     }
2130
2131     return true;
2132 }
2133
2134 wxString wxRichTextCtrl::GetStringSelection() const
2135 {
2136     long from, to;
2137     GetSelection(&from, &to);
2138
2139     return GetRange(from, to);
2140 }
2141
2142 // ----------------------------------------------------------------------------
2143 // hit testing
2144 // ----------------------------------------------------------------------------
2145
2146 wxTextCtrlHitTestResult
2147 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2148 {
2149     // implement in terms of the other overload as the native ports typically
2150     // can get the position and not (x, y) pair directly (although wxUniv
2151     // directly gets x and y -- and so overrides this method as well)
2152     long pos;
2153     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2154
2155     if ( rc != wxTE_HT_UNKNOWN )
2156     {
2157         PositionToXY(pos, x, y);
2158     }
2159
2160     return rc;
2161 }
2162
2163 wxTextCtrlHitTestResult
2164 wxRichTextCtrl::HitTest(const wxPoint& pt,
2165                         long * pos) const
2166 {
2167     wxClientDC dc((wxRichTextCtrl*) this);
2168     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2169
2170     // Buffer uses logical position (relative to start of buffer)
2171     // so convert
2172     wxPoint pt2 = GetLogicalPoint(pt);
2173
2174     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
2175
2176     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2177         return wxTE_HT_BEFORE;
2178     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2179         return wxTE_HT_BEYOND;
2180     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2181         return wxTE_HT_ON_TEXT;
2182
2183     return wxTE_HT_UNKNOWN;
2184 }
2185
2186 // ----------------------------------------------------------------------------
2187 // set/get the controls text
2188 // ----------------------------------------------------------------------------
2189
2190 wxString wxRichTextCtrl::GetValue() const
2191 {
2192     return GetBuffer().GetText();
2193 }
2194
2195 wxString wxRichTextCtrl::GetRange(long from, long to) const
2196 {
2197     // Public API for range is different from internals
2198     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2199 }
2200
2201 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2202 {
2203     // Don't call Clear here, since it always sends a text updated event
2204     m_buffer.ResetAndClearCommands();
2205     m_buffer.SetDirty(true);
2206     m_caretPosition = -1;
2207     m_caretPositionForDefaultStyle = -2;
2208     m_caretAtLineStart = false;
2209     m_selectionRange.SetRange(-2, -2);
2210
2211     Scroll(0,0);
2212
2213     if (!IsFrozen())
2214     {
2215         LayoutContent();
2216         Refresh(false);
2217     }
2218
2219     if (!value.IsEmpty())
2220     {
2221         // Remove empty paragraph
2222         GetBuffer().Clear();
2223         DoWriteText(value, flags);
2224
2225         // for compatibility, don't move the cursor when doing SetValue()
2226         SetInsertionPoint(0);
2227     }
2228     else
2229     {
2230         // still send an event for consistency
2231         if (flags & SetValue_SendEvent)
2232             wxTextCtrl::SendTextUpdatedEvent(this);
2233     }
2234     DiscardEdits();
2235 }
2236
2237 void wxRichTextCtrl::WriteText(const wxString& value)
2238 {
2239     DoWriteText(value);
2240 }
2241
2242 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2243 {
2244     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2245
2246     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2247
2248     if ( flags & SetValue_SendEvent )
2249         wxTextCtrl::SendTextUpdatedEvent(this);
2250 }
2251
2252 void wxRichTextCtrl::AppendText(const wxString& text)
2253 {
2254     SetInsertionPointEnd();
2255
2256     WriteText(text);
2257 }
2258
2259 /// Write an image at the current insertion point
2260 bool wxRichTextCtrl::WriteImage(const wxImage& image, wxBitmapType bitmapType)
2261 {
2262     wxRichTextImageBlock imageBlock;
2263
2264     wxImage image2 = image;
2265     if (imageBlock.MakeImageBlock(image2, bitmapType))
2266         return WriteImage(imageBlock);
2267
2268     return false;
2269 }
2270
2271 bool wxRichTextCtrl::WriteImage(const wxString& filename, wxBitmapType bitmapType)
2272 {
2273     wxRichTextImageBlock imageBlock;
2274
2275     wxImage image;
2276     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2277         return WriteImage(imageBlock);
2278
2279     return false;
2280 }
2281
2282 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2283 {
2284     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2285 }
2286
2287 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, wxBitmapType bitmapType)
2288 {
2289     if (bitmap.Ok())
2290     {
2291         wxRichTextImageBlock imageBlock;
2292
2293         wxImage image = bitmap.ConvertToImage();
2294         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2295             return WriteImage(imageBlock);
2296     }
2297
2298     return false;
2299 }
2300
2301 /// Insert a newline (actually paragraph) at the current insertion point.
2302 bool wxRichTextCtrl::Newline()
2303 {
2304     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
2305 }
2306
2307 /// Insert a line break at the current insertion point.
2308 bool wxRichTextCtrl::LineBreak()
2309 {
2310     wxString text;
2311     text = wxRichTextLineBreakChar;
2312     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2313 }
2314
2315 // ----------------------------------------------------------------------------
2316 // Clipboard operations
2317 // ----------------------------------------------------------------------------
2318
2319 void wxRichTextCtrl::Copy()
2320 {
2321     if (CanCopy())
2322     {
2323         wxRichTextRange range = GetInternalSelectionRange();
2324         GetBuffer().CopyToClipboard(range);
2325     }
2326 }
2327
2328 void wxRichTextCtrl::Cut()
2329 {
2330     if (CanCut())
2331     {
2332         wxRichTextRange range = GetInternalSelectionRange();
2333         GetBuffer().CopyToClipboard(range);
2334
2335         DeleteSelectedContent();
2336         LayoutContent();
2337         Refresh(false);
2338     }
2339 }
2340
2341 void wxRichTextCtrl::Paste()
2342 {
2343     if (CanPaste())
2344     {
2345         BeginBatchUndo(_("Paste"));
2346
2347         long newPos = m_caretPosition;
2348         DeleteSelectedContent(& newPos);
2349
2350         GetBuffer().PasteFromClipboard(newPos);
2351
2352         EndBatchUndo();
2353     }
2354 }
2355
2356 void wxRichTextCtrl::DeleteSelection()
2357 {
2358     if (CanDeleteSelection())
2359     {
2360         DeleteSelectedContent();
2361     }
2362 }
2363
2364 bool wxRichTextCtrl::HasSelection() const
2365 {
2366     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2367 }
2368
2369 bool wxRichTextCtrl::CanCopy() const
2370 {
2371     // Can copy if there's a selection
2372     return HasSelection();
2373 }
2374
2375 bool wxRichTextCtrl::CanCut() const
2376 {
2377     return HasSelection() && IsEditable();
2378 }
2379
2380 bool wxRichTextCtrl::CanPaste() const
2381 {
2382     if ( !IsEditable() )
2383         return false;
2384
2385     return GetBuffer().CanPasteFromClipboard();
2386 }
2387
2388 bool wxRichTextCtrl::CanDeleteSelection() const
2389 {
2390     return HasSelection() && IsEditable();
2391 }
2392
2393
2394 // ----------------------------------------------------------------------------
2395 // Accessors
2396 // ----------------------------------------------------------------------------
2397
2398 void wxRichTextCtrl::SetEditable(bool editable)
2399 {
2400     m_editable = editable;
2401 }
2402
2403 void wxRichTextCtrl::SetInsertionPoint(long pos)
2404 {
2405     SelectNone();
2406
2407     m_caretPosition = pos - 1;
2408
2409     PositionCaret();
2410 }
2411
2412 void wxRichTextCtrl::SetInsertionPointEnd()
2413 {
2414     long pos = GetLastPosition();
2415     SetInsertionPoint(pos);
2416 }
2417
2418 long wxRichTextCtrl::GetInsertionPoint() const
2419 {
2420     return m_caretPosition+1;
2421 }
2422
2423 wxTextPos wxRichTextCtrl::GetLastPosition() const
2424 {
2425     return GetBuffer().GetRange().GetEnd();
2426 }
2427
2428 // If the return values from and to are the same, there is no
2429 // selection.
2430 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2431 {
2432     *from = m_selectionRange.GetStart();
2433     *to = m_selectionRange.GetEnd();
2434     if ((*to) != -1 && (*to) != -2)
2435         (*to) ++;
2436 }
2437
2438 bool wxRichTextCtrl::IsEditable() const
2439 {
2440     return m_editable;
2441 }
2442
2443 // ----------------------------------------------------------------------------
2444 // selection
2445 // ----------------------------------------------------------------------------
2446
2447 void wxRichTextCtrl::SetSelection(long from, long to)
2448 {
2449     // if from and to are both -1, it means (in wxWidgets) that all text should
2450     // be selected.
2451     if ( (from == -1) && (to == -1) )
2452     {
2453         from = 0;
2454         to = GetLastPosition()+1;
2455     }
2456
2457     DoSetSelection(from, to);
2458 }
2459
2460 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2461 {
2462     if (from == to)
2463     {
2464         SelectNone();
2465     }
2466     else
2467     {
2468         wxRichTextRange oldSelection = m_selectionRange;
2469         m_selectionAnchor = from;
2470         m_selectionRange.SetRange(from, to-1);
2471         if (from > -2)
2472             m_caretPosition = from-1;
2473
2474         RefreshForSelectionChange(oldSelection, m_selectionRange);
2475         PositionCaret();
2476     }
2477 }
2478
2479 // ----------------------------------------------------------------------------
2480 // Editing
2481 // ----------------------------------------------------------------------------
2482
2483 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2484                              const wxString& value)
2485 {
2486     BeginBatchUndo(_("Replace"));
2487
2488     DeleteSelectedContent();
2489
2490     DoWriteText(value, SetValue_SelectionOnly);
2491
2492     EndBatchUndo();
2493 }
2494
2495 void wxRichTextCtrl::Remove(long from, long to)
2496 {
2497     SelectNone();
2498
2499     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to-1), this);
2500
2501     LayoutContent();
2502     if (!IsFrozen())
2503         Refresh(false);
2504 }
2505
2506 bool wxRichTextCtrl::IsModified() const
2507 {
2508     return m_buffer.IsModified();
2509 }
2510
2511 void wxRichTextCtrl::MarkDirty()
2512 {
2513     m_buffer.Modify(true);
2514 }
2515
2516 void wxRichTextCtrl::DiscardEdits()
2517 {
2518     m_caretPositionForDefaultStyle = -2;
2519     m_buffer.Modify(false);
2520     m_buffer.GetCommandProcessor()->ClearCommands();
2521 }
2522
2523 int wxRichTextCtrl::GetNumberOfLines() const
2524 {
2525     return GetBuffer().GetParagraphCount();
2526 }
2527
2528 // ----------------------------------------------------------------------------
2529 // Positions <-> coords
2530 // ----------------------------------------------------------------------------
2531
2532 long wxRichTextCtrl::XYToPosition(long x, long y) const
2533 {
2534     return GetBuffer().XYToPosition(x, y);
2535 }
2536
2537 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2538 {
2539     return GetBuffer().PositionToXY(pos, x, y);
2540 }
2541
2542 // ----------------------------------------------------------------------------
2543 //
2544 // ----------------------------------------------------------------------------
2545
2546 void wxRichTextCtrl::ShowPosition(long pos)
2547 {
2548     if (!IsPositionVisible(pos))
2549         ScrollIntoView(pos-1, WXK_DOWN);
2550 }
2551
2552 int wxRichTextCtrl::GetLineLength(long lineNo) const
2553 {
2554     return GetBuffer().GetParagraphLength(lineNo);
2555 }
2556
2557 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2558 {
2559     return GetBuffer().GetParagraphText(lineNo);
2560 }
2561
2562 // ----------------------------------------------------------------------------
2563 // Undo/redo
2564 // ----------------------------------------------------------------------------
2565
2566 void wxRichTextCtrl::Undo()
2567 {
2568     if (CanUndo())
2569     {
2570         GetCommandProcessor()->Undo();
2571     }
2572 }
2573
2574 void wxRichTextCtrl::Redo()
2575 {
2576     if (CanRedo())
2577     {
2578         GetCommandProcessor()->Redo();
2579     }
2580 }
2581
2582 bool wxRichTextCtrl::CanUndo() const
2583 {
2584     return GetCommandProcessor()->CanUndo();
2585 }
2586
2587 bool wxRichTextCtrl::CanRedo() const
2588 {
2589     return GetCommandProcessor()->CanRedo();
2590 }
2591
2592 // ----------------------------------------------------------------------------
2593 // implementation details
2594 // ----------------------------------------------------------------------------
2595
2596 void wxRichTextCtrl::Command(wxCommandEvent& event)
2597 {
2598     SetValue(event.GetString());
2599     GetEventHandler()->ProcessEvent(event);
2600 }
2601
2602 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2603 {
2604     // By default, load the first file into the text window.
2605     if (event.GetNumberOfFiles() > 0)
2606     {
2607         LoadFile(event.GetFiles()[0]);
2608     }
2609 }
2610
2611 wxSize wxRichTextCtrl::DoGetBestSize() const
2612 {
2613     return wxSize(10, 10);
2614 }
2615
2616 // ----------------------------------------------------------------------------
2617 // standard handlers for standard edit menu events
2618 // ----------------------------------------------------------------------------
2619
2620 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2621 {
2622     Cut();
2623 }
2624
2625 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2626 {
2627     DeleteSelection();
2628 }
2629
2630 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2631 {
2632     Copy();
2633 }
2634
2635 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2636 {
2637     Paste();
2638 }
2639
2640 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2641 {
2642     Undo();
2643 }
2644
2645 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2646 {
2647     Redo();
2648 }
2649
2650 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2651 {
2652     event.Enable( CanCut() );
2653 }
2654
2655 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2656 {
2657     event.Enable( CanCopy() );
2658 }
2659
2660 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2661 {
2662     event.Enable( CanDeleteSelection() );
2663 }
2664
2665 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2666 {
2667     event.Enable( CanPaste() );
2668 }
2669
2670 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2671 {
2672     event.Enable( CanUndo() );
2673     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2674 }
2675
2676 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2677 {
2678     event.Enable( CanRedo() );
2679     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2680 }
2681
2682 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2683 {
2684     SelectAll();
2685 }
2686
2687 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2688 {
2689     event.Enable(GetLastPosition() > 0);
2690 }
2691
2692 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2693 {
2694     if (event.GetEventObject() != this)
2695     {
2696         event.Skip();
2697         return;
2698     }
2699
2700     if (!m_contextMenu)
2701     {
2702         m_contextMenu = new wxMenu;
2703         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2704         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2705         m_contextMenu->AppendSeparator();
2706         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2707         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2708         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2709         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2710         m_contextMenu->AppendSeparator();
2711         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2712     }
2713     PopupMenu(m_contextMenu);
2714     return;
2715 }
2716
2717 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2718 {
2719     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttr(style));
2720 }
2721
2722 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxTextAttr& style)
2723 {
2724     return GetBuffer().SetStyle(range.ToInternal(), style);
2725 }
2726
2727 // extended style setting operation with flags including:
2728 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2729 // see richtextbuffer.h for more details.
2730
2731 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttr& style, int flags)
2732 {
2733     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2734 }
2735
2736 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2737 {
2738     return GetBuffer().SetDefaultStyle(wxTextAttr(style));
2739 }
2740
2741 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2742 {
2743     return GetBuffer().GetDefaultStyle();
2744 }
2745
2746 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2747 {
2748     return GetBuffer().GetStyle(position, style);
2749 }
2750
2751 // get the common set of styles for the range
2752 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttr& style)
2753 {
2754     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2755 }
2756
2757 /// Get the content (uncombined) attributes for this position.
2758 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2759 {
2760     return GetBuffer().GetUncombinedStyle(position, style);
2761 }
2762
2763 /// Set font, and also the buffer attributes
2764 bool wxRichTextCtrl::SetFont(const wxFont& font)
2765 {
2766     wxControl::SetFont(font);
2767
2768     wxTextAttr attr = GetBuffer().GetAttributes();
2769     attr.SetFont(font);
2770     GetBuffer().SetBasicStyle(attr);
2771
2772     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2773     Refresh(false);
2774
2775     return true;
2776 }
2777
2778 /// Transform logical to physical
2779 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2780 {
2781     wxPoint pt;
2782     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2783
2784     return pt;
2785 }
2786
2787 /// Transform physical to logical
2788 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2789 {
2790     wxPoint pt;
2791     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2792
2793     return pt;
2794 }
2795
2796 /// Position the caret
2797 void wxRichTextCtrl::PositionCaret()
2798 {
2799     if (!GetCaret())
2800         return;
2801
2802     //wxLogDebug(wxT("PositionCaret"));
2803
2804     wxRect caretRect;
2805     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2806     {
2807         wxPoint newPt = caretRect.GetPosition();
2808         wxSize newSz = caretRect.GetSize();
2809         wxPoint pt = GetPhysicalPoint(newPt);
2810         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
2811         {
2812             GetCaret()->Hide();
2813             if (GetCaret()->GetSize() != newSz)
2814                 GetCaret()->SetSize(newSz);
2815             GetCaret()->Move(pt);
2816             GetCaret()->Show();
2817         }
2818     }
2819 }
2820
2821 /// Get the caret height and position for the given character position
2822 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2823 {
2824     wxClientDC dc(this);
2825     dc.SetFont(GetFont());
2826
2827     PrepareDC(dc);
2828
2829     wxPoint pt;
2830     int height = 0;
2831
2832     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2833     {
2834         // Caret height can't be zero
2835         if (height == 0)
2836             height = dc.GetCharHeight();
2837
2838         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2839         return true;
2840     }
2841
2842     return false;
2843 }
2844
2845 /// Gets the line for the visible caret position. If the caret is
2846 /// shown at the very end of the line, it means the next character is actually
2847 /// on the following line. So let's get the line we're expecting to find
2848 /// if this is the case.
2849 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2850 {
2851     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2852     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2853     if (line)
2854     {
2855         wxRichTextRange lineRange = line->GetAbsoluteRange();
2856         if (caretPosition == lineRange.GetStart()-1 &&
2857             (para->GetRange().GetStart() != lineRange.GetStart()))
2858         {
2859             if (!m_caretAtLineStart)
2860                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2861         }
2862     }
2863     return line;
2864 }
2865
2866
2867 /// Move the caret to the given character position
2868 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2869 {
2870     if (GetBuffer().GetDirty())
2871         LayoutContent();
2872
2873     if (pos <= GetBuffer().GetRange().GetEnd())
2874     {
2875         SetCaretPosition(pos, showAtLineStart);
2876
2877         PositionCaret();
2878
2879         return true;
2880     }
2881     else
2882         return false;
2883 }
2884
2885 /// Layout the buffer: which we must do before certain operations, such as
2886 /// setting the caret position.
2887 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2888 {
2889     if (GetBuffer().GetDirty() || onlyVisibleRect)
2890     {
2891         wxRect availableSpace(GetClientSize());
2892         if (availableSpace.width == 0)
2893             availableSpace.width = 10;
2894         if (availableSpace.height == 0)
2895             availableSpace.height = 10;
2896
2897         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2898         if (onlyVisibleRect)
2899         {
2900             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2901             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2902         }
2903
2904         wxClientDC dc(this);
2905         dc.SetFont(GetFont());
2906
2907         PrepareDC(dc);
2908
2909         GetBuffer().Defragment();
2910         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2911         GetBuffer().Layout(dc, availableSpace, flags);
2912         GetBuffer().SetDirty(false);
2913
2914         if (!IsFrozen())
2915             SetupScrollbars();
2916     }
2917
2918     return true;
2919 }
2920
2921 /// Is all of the selection bold?
2922 bool wxRichTextCtrl::IsSelectionBold()
2923 {
2924     if (HasSelection())
2925     {
2926         wxTextAttr attr;
2927         wxRichTextRange range = GetSelectionRange();
2928         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2929         attr.SetFontWeight(wxBOLD);
2930
2931         return HasCharacterAttributes(range, attr);
2932     }
2933     else
2934     {
2935         // If no selection, then we need to combine current style with default style
2936         // to see what the effect would be if we started typing.
2937         wxTextAttr attr;
2938         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2939
2940         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2941         if (GetStyle(pos, attr))
2942         {
2943             if (IsDefaultStyleShowing())
2944                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2945             return attr.GetFontWeight() == wxBOLD;
2946         }
2947     }
2948     return false;
2949 }
2950
2951 /// Is all of the selection italics?
2952 bool wxRichTextCtrl::IsSelectionItalics()
2953 {
2954     if (HasSelection())
2955     {
2956         wxRichTextRange range = GetSelectionRange();
2957         wxTextAttr attr;
2958         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2959         attr.SetFontStyle(wxITALIC);
2960
2961         return HasCharacterAttributes(range, attr);
2962     }
2963     else
2964     {
2965         // If no selection, then we need to combine current style with default style
2966         // to see what the effect would be if we started typing.
2967         wxTextAttr attr;
2968         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2969
2970         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2971         if (GetStyle(pos, attr))
2972         {
2973             if (IsDefaultStyleShowing())
2974                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2975             return attr.GetFontStyle() == wxITALIC;
2976         }
2977     }
2978     return false;
2979 }
2980
2981 /// Is all of the selection underlined?
2982 bool wxRichTextCtrl::IsSelectionUnderlined()
2983 {
2984     if (HasSelection())
2985     {
2986         wxRichTextRange range = GetSelectionRange();
2987         wxTextAttr attr;
2988         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2989         attr.SetFontUnderlined(true);
2990
2991         return HasCharacterAttributes(range, attr);
2992     }
2993     else
2994     {
2995         // If no selection, then we need to combine current style with default style
2996         // to see what the effect would be if we started typing.
2997         wxTextAttr attr;
2998         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2999         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3000
3001         if (GetStyle(pos, attr))
3002         {
3003             if (IsDefaultStyleShowing())
3004                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3005             return attr.GetFontUnderlined();
3006         }
3007     }
3008     return false;
3009 }
3010
3011 /// Apply bold to the selection
3012 bool wxRichTextCtrl::ApplyBoldToSelection()
3013 {
3014     wxTextAttr attr;
3015     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3016     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
3017
3018     if (HasSelection())
3019         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3020     else
3021     {
3022         wxRichTextAttr current = GetDefaultStyleEx();
3023         current.Apply(attr);
3024         SetAndShowDefaultStyle(current);
3025     }
3026     return true;
3027 }
3028
3029 /// Apply italic to the selection
3030 bool wxRichTextCtrl::ApplyItalicToSelection()
3031 {
3032     wxTextAttr attr;
3033     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3034     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
3035
3036     if (HasSelection())
3037         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3038     else
3039     {
3040         wxRichTextAttr current = GetDefaultStyleEx();
3041         current.Apply(attr);
3042         SetAndShowDefaultStyle(current);
3043     }
3044     return true;
3045 }
3046
3047 /// Apply underline to the selection
3048 bool wxRichTextCtrl::ApplyUnderlineToSelection()
3049 {
3050     wxTextAttr attr;
3051     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3052     attr.SetFontUnderlined(!IsSelectionUnderlined());
3053
3054     if (HasSelection())
3055         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3056     else
3057     {
3058         wxRichTextAttr current = GetDefaultStyleEx();
3059         current.Apply(attr);
3060         SetAndShowDefaultStyle(current);
3061     }
3062     return true;
3063 }
3064
3065 /// Is all of the selection aligned according to the specified flag?
3066 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
3067 {
3068     wxRichTextRange range;
3069     if (HasSelection())
3070         range = GetSelectionRange();
3071     else
3072         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
3073
3074     wxTextAttr attr;
3075     attr.SetAlignment(alignment);
3076
3077     return HasParagraphAttributes(range, attr);
3078 }
3079
3080 /// Apply alignment to the selection
3081 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
3082 {
3083     wxTextAttr attr;
3084     attr.SetAlignment(alignment);
3085     if (HasSelection())
3086         return SetStyle(GetSelectionRange(), attr);
3087     else
3088     {
3089         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
3090         if (para)
3091             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
3092     }
3093     return true;
3094 }
3095
3096 /// Apply a named style to the selection
3097 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
3098 {
3099     // Flags are defined within each definition, so only certain
3100     // attributes are applied.
3101     wxTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
3102
3103     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_RESET;
3104
3105     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
3106     {
3107         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3108
3109         wxRichTextRange range;
3110
3111         if (HasSelection())
3112             range = GetSelectionRange();
3113         else
3114         {
3115             long pos = GetAdjustedCaretPosition(GetCaretPosition());
3116             range = wxRichTextRange(pos, pos+1);
3117         }
3118
3119         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
3120     }
3121
3122     // Make sure the attr has the style name
3123     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
3124     {
3125         attr.SetParagraphStyleName(def->GetName());
3126
3127         // If applying a paragraph style, we only want the paragraph nodes to adopt these
3128         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
3129         // to change its style independently.
3130         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3131     }
3132     else
3133         attr.SetCharacterStyleName(def->GetName());
3134
3135     if (HasSelection())
3136         return SetStyleEx(GetSelectionRange(), attr, flags);
3137     else
3138     {
3139         wxRichTextAttr current = GetDefaultStyleEx();
3140         current.Apply(attr);
3141         SetAndShowDefaultStyle(current);
3142         return true;
3143     }
3144 }
3145
3146 /// Apply the style sheet to the buffer, for example if the styles have changed.
3147 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
3148 {
3149     if (!styleSheet)
3150         styleSheet = GetBuffer().GetStyleSheet();
3151     if (!styleSheet)
3152         return false;
3153
3154     if (GetBuffer().ApplyStyleSheet(styleSheet))
3155     {
3156         GetBuffer().Invalidate(wxRICHTEXT_ALL);
3157         Refresh(false);
3158         return true;
3159     }
3160     else
3161         return false;
3162 }
3163
3164 /// Sets the default style to the style under the cursor
3165 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3166 {
3167     wxTextAttr attr;
3168     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3169
3170     // If at the start of a paragraph, use the next position.
3171     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3172
3173     if (GetUncombinedStyle(pos, attr))
3174     {
3175         SetDefaultStyle(attr);
3176         return true;
3177     }
3178
3179     return false;
3180 }
3181
3182 /// Returns the first visible position in the current view
3183 long wxRichTextCtrl::GetFirstVisiblePosition() const
3184 {
3185     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3186     if (line)
3187         return line->GetAbsoluteRange().GetStart();
3188     else
3189         return 0;
3190 }
3191
3192 /// Get the first visible point in the window
3193 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3194 {
3195     int ppuX, ppuY;
3196     int startXUnits, startYUnits;
3197
3198     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3199     GetViewStart(& startXUnits, & startYUnits);
3200
3201     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3202 }
3203
3204 /// The adjusted caret position is the character position adjusted to take
3205 /// into account whether we're at the start of a paragraph, in which case
3206 /// style information should be taken from the next position, not current one.
3207 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3208 {
3209     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3210
3211     if (para && (caretPos+1 == para->GetRange().GetStart()))
3212         caretPos ++;
3213     return caretPos;
3214 }
3215
3216 /// Get/set the selection range in character positions. -1, -1 means no selection.
3217 /// The range is in API convention, i.e. a single character selection is denoted
3218 /// by (n, n+1)
3219 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3220 {
3221     wxRichTextRange range = GetInternalSelectionRange();
3222     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3223         range.SetEnd(range.GetEnd() + 1);
3224     return range;
3225 }
3226
3227 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3228 {
3229     wxRichTextRange range1(range);
3230     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3231         range1.SetEnd(range1.GetEnd() - 1);
3232
3233     wxASSERT( range1.GetStart() > range1.GetEnd() );
3234
3235     SetInternalSelectionRange(range1);
3236 }
3237
3238 /// Set list style
3239 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3240 {
3241     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3242 }
3243
3244 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3245 {
3246     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3247 }
3248
3249 /// Clear list for given range
3250 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3251 {
3252     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3253 }
3254
3255 /// Number/renumber any list elements in the given range
3256 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3257 {
3258     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3259 }
3260
3261 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3262 {
3263     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3264 }
3265
3266 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3267 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3268 {
3269     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3270 }
3271
3272 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3273 {
3274     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3275 }
3276
3277 /// Deletes the content in the given range
3278 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3279 {
3280     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3281 }
3282
3283 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3284 {
3285     if (sm_availableFontNames.GetCount() == 0)
3286     {
3287         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3288         sm_availableFontNames.Sort();
3289     }
3290     return sm_availableFontNames;
3291 }
3292
3293 void wxRichTextCtrl::ClearAvailableFontNames()
3294 {
3295     sm_availableFontNames.Clear();
3296 }
3297
3298 void wxRichTextCtrl::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
3299 {
3300     //wxLogDebug(wxT("wxRichTextCtrl::OnSysColourChanged"));
3301
3302     wxTextAttrEx basicStyle = GetBasicStyle();
3303     basicStyle.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
3304     SetBasicStyle(basicStyle);
3305     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
3306
3307     Refresh();
3308 }
3309
3310 // Refresh the area affected by a selection change
3311 bool wxRichTextCtrl::RefreshForSelectionChange(const wxRichTextRange& oldSelection, const wxRichTextRange& newSelection)
3312 {
3313     // Calculate the refresh rectangle - just the affected lines
3314     long firstPos, lastPos;
3315     if (oldSelection.GetStart() == -2 && newSelection.GetStart() != -2)
3316     {
3317         firstPos = newSelection.GetStart();
3318         lastPos = newSelection.GetEnd();
3319     }
3320     else if (oldSelection.GetStart() != -2 && newSelection.GetStart() == -2)
3321     {
3322         firstPos = oldSelection.GetStart();
3323         lastPos = oldSelection.GetEnd();
3324     }
3325     else if (oldSelection.GetStart() == -2 && newSelection.GetStart() == -2)
3326     {
3327         return false;
3328     }
3329     else
3330     {
3331         firstPos = wxMin(oldSelection.GetStart(), newSelection.GetStart());
3332         lastPos = wxMax(oldSelection.GetEnd(), newSelection.GetEnd());
3333     }
3334
3335     wxRichTextLine* firstLine = GetBuffer().GetLineAtPosition(firstPos);
3336     wxRichTextLine* lastLine = GetBuffer().GetLineAtPosition(lastPos);
3337
3338     if (firstLine && lastLine)
3339     {
3340         wxSize clientSize = GetClientSize();
3341         wxPoint pt1 = GetPhysicalPoint(firstLine->GetAbsolutePosition());
3342         wxPoint pt2 = GetPhysicalPoint(lastLine->GetAbsolutePosition()) + wxPoint(0, lastLine->GetSize().y);
3343
3344         pt1.x = 0;
3345         pt1.y = wxMax(0, pt1.y);
3346         pt2.x = 0;
3347         pt2.y = wxMin(clientSize.y, pt2.y);
3348
3349         wxRect rect(pt1, wxSize(clientSize.x, pt2.y - pt1.y));
3350         RefreshRect(rect, false);
3351     }
3352     else
3353         Refresh(false);
3354
3355     return true;
3356 }
3357
3358 #if wxRICHTEXT_USE_OWN_CARET
3359
3360 // ----------------------------------------------------------------------------
3361 // initialization and destruction
3362 // ----------------------------------------------------------------------------
3363
3364 void wxRichTextCaret::Init()
3365 {
3366     m_hasFocus = true;
3367
3368     m_xOld =
3369     m_yOld = -1;
3370     m_richTextCtrl = NULL;
3371     m_needsUpdate = false;
3372 }
3373
3374 wxRichTextCaret::~wxRichTextCaret()
3375 {
3376 }
3377
3378 // ----------------------------------------------------------------------------
3379 // showing/hiding/moving the caret (base class interface)
3380 // ----------------------------------------------------------------------------
3381
3382 void wxRichTextCaret::DoShow()
3383 {
3384     Refresh();
3385 }
3386
3387 void wxRichTextCaret::DoHide()
3388 {
3389     Refresh();
3390 }
3391
3392 void wxRichTextCaret::DoMove()
3393 {
3394     if (IsVisible())
3395     {
3396         Refresh();
3397
3398         if (m_xOld != -1 && m_yOld != -1)
3399         {
3400             if (m_richTextCtrl)
3401             {
3402                 wxRect rect(GetPosition(), GetSize());
3403                 m_richTextCtrl->RefreshRect(rect, false);
3404             }
3405         }
3406     }
3407
3408     m_xOld = m_x;
3409     m_yOld = m_y;
3410 }
3411
3412 void wxRichTextCaret::DoSize()
3413 {
3414     int countVisible = m_countVisible;
3415     if (countVisible > 0)
3416     {
3417         m_countVisible = 0;
3418         DoHide();
3419     }
3420
3421     if (countVisible > 0)
3422     {
3423         m_countVisible = countVisible;
3424         DoShow();
3425     }
3426 }
3427
3428 // ----------------------------------------------------------------------------
3429 // handling the focus
3430 // ----------------------------------------------------------------------------
3431
3432 void wxRichTextCaret::OnSetFocus()
3433 {
3434     m_hasFocus = true;
3435
3436     if ( IsVisible() )
3437         Refresh();
3438 }
3439
3440 void wxRichTextCaret::OnKillFocus()
3441 {
3442     m_hasFocus = false;
3443 }
3444
3445 // ----------------------------------------------------------------------------
3446 // drawing the caret
3447 // ----------------------------------------------------------------------------
3448
3449 void wxRichTextCaret::Refresh()
3450 {
3451     if (m_richTextCtrl)
3452     {
3453         wxRect rect(GetPosition(), GetSize());
3454         m_richTextCtrl->RefreshRect(rect, false);
3455     }
3456 }
3457
3458 void wxRichTextCaret::DoDraw(wxDC *dc)
3459 {
3460     dc->SetPen( *wxBLACK_PEN );
3461
3462     dc->SetBrush(*(m_hasFocus ? wxBLACK_BRUSH : wxTRANSPARENT_BRUSH));
3463     dc->SetPen(*wxBLACK_PEN);
3464
3465     // VZ: unfortunately, the rectangle comes out a pixel smaller when this is
3466     //     done under wxGTK - no idea why
3467     //dc->SetLogicalFunction(wxINVERT);
3468
3469     wxPoint pt(m_x, m_y);
3470
3471     if (m_richTextCtrl)
3472     {
3473         pt = m_richTextCtrl->GetLogicalPoint(pt);
3474     }
3475     dc->DrawRectangle(pt.x, pt.y, m_width, m_height);
3476 }
3477 #endif
3478     // wxRICHTEXT_USE_OWN_CARET
3479
3480 #endif
3481     // wxUSE_RICHTEXT