src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richeditctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/timer.h"
  30 #include "wx/textfile.h"
  31 #include "wx/ffile.h"
  32 #include "wx/filename.h"
  33 #include "wx/dcbuffer.h"
  34 #include "wx/arrimpl.cpp"
  35 #include "wx/fontenum.h"
  36 #include "wx/accel.h"
  37
  38 // DLL options compatibility check:
  39 #include "wx/app.h"
  40 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  41
  42 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_LEFT_CLICK, wxRichTextEvent );
  43 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK, wxRichTextEvent );
  44 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK, wxRichTextEvent );
  45 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK, wxRichTextEvent );
  46 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_RETURN, wxRichTextEvent );
  47 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CHARACTER, wxRichTextEvent );
  48 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_DELETE, wxRichTextEvent );
  49
  50 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING, wxRichTextEvent );
  51 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED, wxRichTextEvent );
  52 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING, wxRichTextEvent );
  53 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED, wxRichTextEvent );
  54
  55 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED, wxRichTextEvent );
  56 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED, wxRichTextEvent );
  57 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED, wxRichTextEvent );
  58 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED, wxRichTextEvent );
  59 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_BUFFER_RESET, wxRichTextEvent );
  60
  61 #if wxRICHTEXT_USE_OWN_CARET
  62
  63 /*!
  64  * wxRichTextCaret
  65  *
  66  * This implements a non-flashing cursor in case there
  67  * are platform-specific problems with the generic caret.
  68  * wxRICHTEXT_USE_OWN_CARET is set in richtextbuffer.h.
  69  */
  70
  71 class wxRichTextCaret;
  72 class wxRichTextCaretTimer: public wxTimer
  73 {
  74   public:
  75     wxRichTextCaretTimer(wxRichTextCaret* caret)
  76     {
  77         m_caret = caret;
  78     }
  79     virtual void Notify();
  80     wxRichTextCaret* m_caret;
  81 };
  82
  83 class wxRichTextCaret: public wxCaret
  84 {
  85 public:
  86     // ctors
  87     // -----
  88         // default - use Create()
  89     wxRichTextCaret(): m_timer(this)  { Init(); }
  90         // creates a block caret associated with the given window
  91     wxRichTextCaret(wxRichTextCtrl *window, int width, int height)
  92         : wxCaret(window, width, height), m_timer(this) { Init(); m_richTextCtrl = window; }
  93     wxRichTextCaret(wxRichTextCtrl *window, const wxSize& size)
  94         : wxCaret(window, size), m_timer(this) { Init(); m_richTextCtrl = window; }
  95
  96     virtual ~wxRichTextCaret();
  97
  98     // implementation
  99     // --------------
 100
 101     // called by wxWindow (not using the event tables)
 102     virtual void OnSetFocus();
 103     virtual void OnKillFocus();
 104
 105     // draw the caret on the given DC
 106     void DoDraw(wxDC *dc);
 107
 108     // get the visible count
 109     int GetVisibleCount() const { return m_countVisible; }
 110
 111     // delay repositioning
 112     bool GetNeedsUpdate() const { return m_needsUpdate; }
 113     void SetNeedsUpdate(bool needsUpdate = true ) { m_needsUpdate = needsUpdate; }
 114
 115     void Notify();
 116
 117 protected:
 118     virtual void DoShow();
 119     virtual void DoHide();
 120     virtual void DoMove();
 121     virtual void DoSize();
 122
 123     // refresh the caret
 124     void Refresh();
 125
 126 private:
 127     void Init();
 128
 129     int           m_xOld,
 130                   m_yOld;
 131     bool          m_hasFocus;       // true => our window has focus
 132     bool          m_needsUpdate;    // must be repositioned
 133     bool          m_flashOn;
 134     wxRichTextCaretTimer m_timer;
 135     wxRichTextCtrl* m_richTextCtrl;
 136 };
 137 #endif
 138
 139 IMPLEMENT_DYNAMIC_CLASS( wxRichTextCtrl, wxTextCtrlBase )
 140
 141 IMPLEMENT_DYNAMIC_CLASS( wxRichTextEvent, wxNotifyEvent )
 142
 143 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxTextCtrlBase )
 144     EVT_PAINT(wxRichTextCtrl::OnPaint)
 145     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
 146     EVT_IDLE(wxRichTextCtrl::OnIdle)
 147     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
 148     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
 149     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
 150     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
 151     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
 152     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
 153     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
 154     EVT_CHAR(wxRichTextCtrl::OnChar)
 155     EVT_KEY_DOWN(wxRichTextCtrl::OnChar)
 156     EVT_SIZE(wxRichTextCtrl::OnSize)
 157     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
 158     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
 159     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
 160     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
 161     EVT_SYS_COLOUR_CHANGED(wxRichTextCtrl::OnSysColourChanged)
 162
 163     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
 164     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
 165
 166     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
 167     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
 168
 169     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
 170     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
 171
 172     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
 173     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
 174
 175     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
 176     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
 177
 178     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
 179     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
 180
 181     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
 182     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 183 END_EVENT_TABLE()
 184
 185 /*!
 186  * wxRichTextCtrl
 187  */
 188
 189 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 190
 191 wxRichTextCtrl::wxRichTextCtrl()
 192               : wxScrollHelper(this)
 193 {
 194     Init();
 195 }
 196
 197 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 198                                wxWindowID id,
 199                                const wxString& value,
 200                                const wxPoint& pos,
 201                                const wxSize& size,
 202                                long style,
 203                                const wxValidator& validator,
 204                                const wxString& name)
 205               : wxScrollHelper(this)
 206 {
 207     Init();
 208     Create(parent, id, value, pos, size, style, validator, name);
 209 }
 210
 211 /// Creation
 212 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 213                              const wxValidator& validator, const wxString& name)
 214 {
 215     style |= wxVSCROLL;
 216
 217     if (!wxTextCtrlBase::Create(parent, id, pos, size,
 218                            style|wxFULL_REPAINT_ON_RESIZE,
 219                            validator, name))
 220         return false;
 221
 222     if (!GetFont().Ok())
 223     {
 224         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 225     }
 226
 227     // No physical scrolling, so we can preserve margins
 228     EnableScrolling(false, false);
 229
 230     if (style & wxTE_READONLY)
 231         SetEditable(false);
 232
 233     // The base attributes must all have default values
 234     wxTextAttr attributes;
 235     attributes.SetFont(GetFont());
 236     attributes.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
 237     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 238     attributes.SetLineSpacing(10);
 239     attributes.SetParagraphSpacingAfter(10);
 240     attributes.SetParagraphSpacingBefore(0);
 241
 242     SetBasicStyle(attributes);
 243
 244     // The default attributes will be merged with base attributes, so
 245     // can be empty to begin with
 246     wxTextAttr defaultAttributes;
 247     SetDefaultStyle(defaultAttributes);
 248
 249     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 250     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 251
 252     GetBuffer().Reset();
 253     GetBuffer().SetRichTextCtrl(this);
 254
 255 #if wxRICHTEXT_USE_OWN_CARET
 256     SetCaret(new wxRichTextCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 257 #else
 258     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 259 #endif
 260
 261     // Tell the sizers to use the given or best size
 262     SetInitialSize(size);
 263
 264 #if wxRICHTEXT_BUFFERED_PAINTING
 265     // Create a buffer
 266     RecreateBuffer(size);
 267 #endif
 268
 269     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 270     m_urlCursor = wxCursor(wxCURSOR_HAND);
 271
 272     SetCursor(m_textCursor);
 273
 274     if (!value.IsEmpty())
 275         SetValue(value);
 276
 277     GetBuffer().AddEventHandler(this);
 278
 279     // Accelerators
 280     wxAcceleratorEntry entries[6];
 281
 282     entries[0].Set(wxACCEL_CMD,   (int) 'C',       wxID_COPY);
 283     entries[1].Set(wxACCEL_CMD,   (int) 'X',       wxID_CUT);
 284     entries[2].Set(wxACCEL_CMD,   (int) 'V',       wxID_PASTE);
 285     entries[3].Set(wxACCEL_CMD,   (int) 'A',       wxID_SELECTALL);
 286     entries[4].Set(wxACCEL_CMD,   (int) 'Z',       wxID_UNDO);
 287     entries[5].Set(wxACCEL_CMD,   (int) 'Y',       wxID_REDO);
 288
 289     wxAcceleratorTable accel(6, entries);
 290     SetAcceleratorTable(accel);
 291
 292     return true;
 293 }
 294
 295 wxRichTextCtrl::~wxRichTextCtrl()
 296 {
 297     GetBuffer().RemoveEventHandler(this);
 298
 299     delete m_contextMenu;
 300 }
 301
 302 /// Member initialisation
 303 void wxRichTextCtrl::Init()
 304 {
 305     m_contextMenu = NULL;
 306     m_caret = NULL;
 307     m_caretPosition = -1;
 308     m_selectionRange.SetRange(-2, -2);
 309     m_selectionAnchor = -2;
 310     m_editable = true;
 311     m_caretAtLineStart = false;
 312     m_dragging = false;
 313     m_fullLayoutRequired = false;
 314     m_fullLayoutTime = 0;
 315     m_fullLayoutSavedPosition = 0;
 316     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 317     m_caretPositionForDefaultStyle = -2;
 318 }
 319
 320 void wxRichTextCtrl::DoThaw()
 321 {
 322     if (GetBuffer().GetDirty())
 323         LayoutContent();
 324     else
 325         SetupScrollbars();
 326
 327     wxWindow::DoThaw();
 328 }
 329
 330 /// Clear all text
 331 void wxRichTextCtrl::Clear()
 332 {
 333     m_buffer.ResetAndClearCommands();
 334     m_buffer.SetDirty(true);
 335     m_caretPosition = -1;
 336     m_caretPositionForDefaultStyle = -2;
 337     m_caretAtLineStart = false;
 338     m_selectionRange.SetRange(-2, -2);
 339
 340     Scroll(0,0);
 341
 342     if (!IsFrozen())
 343     {
 344         LayoutContent();
 345         Refresh(false);
 346     }
 347
 348     wxTextCtrl::SendTextUpdatedEvent(this);
 349 }
 350
 351 /// Painting
 352 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 353 {
 354 #if !wxRICHTEXT_USE_OWN_CARET
 355     if (GetCaret() && !IsFrozen())
 356         GetCaret()->Hide();
 357 #endif
 358
 359     {
 360 #if wxRICHTEXT_BUFFERED_PAINTING
 361         wxBufferedPaintDC dc(this, m_bufferBitmap);
 362 #else
 363         wxPaintDC dc(this);
 364 #endif
 365
 366         if (IsFrozen())
 367             return;
 368
 369         PrepareDC(dc);
 370
 371         dc.SetFont(GetFont());
 372
 373         // Paint the background
 374         PaintBackground(dc);
 375
 376         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 377
 378         wxRect drawingArea(GetUpdateRegion().GetBox());
 379         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 380
 381         wxRect availableSpace(GetClientSize());
 382         if (GetBuffer().GetDirty())
 383         {
 384             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 385             GetBuffer().SetDirty(false);
 386             SetupScrollbars();
 387         }
 388
 389         wxRect clipRect(availableSpace);
 390         clipRect.x += GetBuffer().GetLeftMargin();
 391         clipRect.y += GetBuffer().GetTopMargin();
 392         clipRect.width -= (GetBuffer().GetLeftMargin() + GetBuffer().GetRightMargin());
 393         clipRect.height -= (GetBuffer().GetTopMargin() + GetBuffer().GetBottomMargin());
 394         clipRect.SetPosition(GetLogicalPoint(clipRect.GetPosition()));
 395         dc.SetClippingRegion(clipRect);
 396
 397         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 398
 399         dc.DestroyClippingRegion();
 400
 401 #if wxRICHTEXT_USE_OWN_CARET
 402         if (GetCaret()->IsVisible())
 403         {
 404             ((wxRichTextCaret*) GetCaret())->DoDraw(& dc);
 405         }
 406 #endif
 407     }
 408
 409 #if !wxRICHTEXT_USE_OWN_CARET
 410     if (GetCaret())
 411         GetCaret()->Show();
 412     PositionCaret();
 413 #endif
 414 }
 415
 416 // Empty implementation, to prevent flicker
 417 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 418 {
 419 }
 420
 421 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 422 {
 423     if (GetCaret())
 424     {
 425 #if !wxRICHTEXT_USE_OWN_CARET
 426         PositionCaret();
 427 #endif
 428         GetCaret()->Show();
 429     }
 430
 431 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 432     // Work around dropouts when control is focused
 433     if (!IsFrozen())
 434     {
 435         Refresh(false);
 436     }
 437 #endif
 438 }
 439
 440 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 441 {
 442     if (GetCaret())
 443         GetCaret()->Hide();
 444
 445 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 446     // Work around dropouts when control is focused
 447     if (!IsFrozen())
 448     {
 449         Refresh(false);
 450     }
 451 #endif
 452 }
 453
 454 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 455 {
 456     m_dragging = false;
 457 }
 458
 459 /// Left-click
 460 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 461 {
 462     SetFocus();
 463
 464     wxClientDC dc(this);
 465     PrepareDC(dc);
 466     dc.SetFont(GetFont());
 467
 468     long position = 0;
 469     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 470
 471     if (hit != wxRICHTEXT_HITTEST_NONE)
 472     {
 473         m_dragStart = event.GetLogicalPosition(dc);
 474         m_dragging = true;
 475         CaptureMouse();
 476
 477         bool caretAtLineStart = false;
 478
 479         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 480         {
 481             // If we're at the start of a line (but not first in para)
 482             // then we should keep the caret showing at the start of the line
 483             // by showing the m_caretAtLineStart flag.
 484             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 485             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 486
 487             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 488                 caretAtLineStart = true;
 489             position --;
 490         }
 491
 492         long oldCaretPos = m_caretPosition;
 493
 494         MoveCaret(position, caretAtLineStart);
 495         SetDefaultStyleToCursorStyle();
 496
 497         if (event.ShiftDown())
 498         {
 499             if (m_selectionRange.GetStart() == -2)
 500                 ExtendSelection(oldCaretPos, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 501             else
 502                 ExtendSelection(m_caretPosition, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 503         }
 504         else
 505             SelectNone();
 506     }
 507
 508     event.Skip();
 509 }
 510
 511 /// Left-up
 512 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 513 {
 514     if (m_dragging)
 515     {
 516         m_dragging = false;
 517         if (GetCapture() == this)
 518             ReleaseMouse();
 519
 520         // See if we clicked on a URL
 521         wxClientDC dc(this);
 522         PrepareDC(dc);
 523         dc.SetFont(GetFont());
 524
 525         long position = 0;
 526         wxPoint logicalPt = event.GetLogicalPosition(dc);
 527         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 528
 529         if ((hit != wxRICHTEXT_HITTEST_NONE) && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 530         {
 531             wxRichTextEvent cmdEvent(
 532                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 533                 GetId());
 534             cmdEvent.SetEventObject(this);
 535             cmdEvent.SetPosition(m_caretPosition+1);
 536
 537             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 538             {
 539                 wxTextAttr attr;
 540                 if (GetStyle(position, attr))
 541                 {
 542                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 543                     {
 544                         wxString urlTarget = attr.GetURL();
 545                         if (!urlTarget.IsEmpty())
 546                         {
 547                             wxMouseEvent mouseEvent(event);
 548
 549                             long startPos = 0, endPos = 0;
 550                             wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 551                             if (obj)
 552                             {
 553                                 startPos = obj->GetRange().GetStart();
 554                                 endPos = obj->GetRange().GetEnd();
 555                             }
 556
 557                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 558                             InitCommandEvent(urlEvent);
 559
 560                             urlEvent.SetString(urlTarget);
 561
 562                             GetEventHandler()->ProcessEvent(urlEvent);
 563                         }
 564                     }
 565                 }
 566             }
 567         }
 568     }
 569 }
 570
 571 /// Left-click
 572 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 573 {
 574     wxClientDC dc(this);
 575     PrepareDC(dc);
 576     dc.SetFont(GetFont());
 577
 578     long position = 0;
 579     wxPoint logicalPt = event.GetLogicalPosition(dc);
 580     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 581
 582     // See if we need to change the cursor
 583
 584     {
 585         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 586         {
 587             wxTextAttr attr;
 588             if (GetStyle(position, attr))
 589             {
 590                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 591                 {
 592                     SetCursor(m_urlCursor);
 593                 }
 594                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 595                 {
 596                     SetCursor(m_textCursor);
 597                 }
 598             }
 599         }
 600         else
 601             SetCursor(m_textCursor);
 602     }
 603
 604     if (!event.Dragging())
 605     {
 606         event.Skip();
 607         return;
 608     }
 609
 610     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 611     {
 612         // TODO: test closeness
 613
 614         bool caretAtLineStart = false;
 615
 616         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 617         {
 618             // If we're at the start of a line (but not first in para)
 619             // then we should keep the caret showing at the start of the line
 620             // by showing the m_caretAtLineStart flag.
 621             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 622             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 623
 624             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 625                 caretAtLineStart = true;
 626             position --;
 627         }
 628
 629         if (m_caretPosition != position)
 630         {
 631             ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 632
 633             MoveCaret(position, caretAtLineStart);
 634             SetDefaultStyleToCursorStyle();
 635         }
 636     }
 637 }
 638
 639 /// Right-click
 640 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 641 {
 642     SetFocus();
 643
 644     wxRichTextEvent cmdEvent(
 645         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 646         GetId());
 647     cmdEvent.SetEventObject(this);
 648     cmdEvent.SetPosition(m_caretPosition+1);
 649
 650     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 651         event.Skip();
 652 }
 653
 654 /// Left-double-click
 655 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 656 {
 657     wxRichTextEvent cmdEvent(
 658         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
 659         GetId());
 660     cmdEvent.SetEventObject(this);
 661     cmdEvent.SetPosition(m_caretPosition+1);
 662
 663     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 664     {
 665         SelectWord(GetCaretPosition()+1);
 666     }
 667 }
 668
 669 /// Middle-click
 670 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 671 {
 672     wxRichTextEvent cmdEvent(
 673         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
 674         GetId());
 675     cmdEvent.SetEventObject(this);
 676     cmdEvent.SetPosition(m_caretPosition+1);
 677
 678     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 679         event.Skip();
 680 }
 681
 682 /// Key press
 683 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 684 {
 685     int flags = 0;
 686     if (event.CmdDown())
 687         flags |= wxRICHTEXT_CTRL_DOWN;
 688     if (event.ShiftDown())
 689         flags |= wxRICHTEXT_SHIFT_DOWN;
 690     if (event.AltDown())
 691         flags |= wxRICHTEXT_ALT_DOWN;
 692
 693     if (event.GetEventType() == wxEVT_KEY_DOWN)
 694     {
 695         if (event.GetKeyCode() == WXK_LEFT ||
 696             event.GetKeyCode() == WXK_RIGHT ||
 697             event.GetKeyCode() == WXK_UP ||
 698             event.GetKeyCode() == WXK_DOWN ||
 699             event.GetKeyCode() == WXK_HOME ||
 700             event.GetKeyCode() == WXK_PAGEUP ||
 701             event.GetKeyCode() == WXK_PAGEDOWN ||
 702             event.GetKeyCode() == WXK_END ||
 703
 704             event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 705             event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 706             event.GetKeyCode() == WXK_NUMPAD_UP ||
 707             event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 708             event.GetKeyCode() == WXK_NUMPAD_HOME ||
 709             event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 710             event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 711             event.GetKeyCode() == WXK_NUMPAD_END)
 712         {
 713             KeyboardNavigate(event.GetKeyCode(), flags);
 714             return;
 715         }
 716
 717         long keycode = event.GetKeyCode();
 718         switch ( keycode )
 719         {
 720             case WXK_ESCAPE:
 721             case WXK_START:
 722             case WXK_LBUTTON:
 723             case WXK_RBUTTON:
 724             case WXK_CANCEL:
 725             case WXK_MBUTTON:
 726             case WXK_CLEAR:
 727             case WXK_SHIFT:
 728             case WXK_ALT:
 729             case WXK_CONTROL:
 730             case WXK_MENU:
 731             case WXK_PAUSE:
 732             case WXK_CAPITAL:
 733             case WXK_END:
 734             case WXK_HOME:
 735             case WXK_LEFT:
 736             case WXK_UP:
 737             case WXK_RIGHT:
 738             case WXK_DOWN:
 739             case WXK_SELECT:
 740             case WXK_PRINT:
 741             case WXK_EXECUTE:
 742             case WXK_SNAPSHOT:
 743             case WXK_INSERT:
 744             case WXK_HELP:
 745             case WXK_F1:
 746             case WXK_F2:
 747             case WXK_F3:
 748             case WXK_F4:
 749             case WXK_F5:
 750             case WXK_F6:
 751             case WXK_F7:
 752             case WXK_F8:
 753             case WXK_F9:
 754             case WXK_F10:
 755             case WXK_F11:
 756             case WXK_F12:
 757             case WXK_F13:
 758             case WXK_F14:
 759             case WXK_F15:
 760             case WXK_F16:
 761             case WXK_F17:
 762             case WXK_F18:
 763             case WXK_F19:
 764             case WXK_F20:
 765             case WXK_F21:
 766             case WXK_F22:
 767             case WXK_F23:
 768             case WXK_F24:
 769             case WXK_NUMLOCK:
 770             case WXK_SCROLL:
 771             case WXK_PAGEUP:
 772             case WXK_PAGEDOWN:
 773             case WXK_NUMPAD_F1:
 774             case WXK_NUMPAD_F2:
 775             case WXK_NUMPAD_F3:
 776             case WXK_NUMPAD_F4:
 777             case WXK_NUMPAD_HOME:
 778             case WXK_NUMPAD_LEFT:
 779             case WXK_NUMPAD_UP:
 780             case WXK_NUMPAD_RIGHT:
 781             case WXK_NUMPAD_DOWN:
 782             case WXK_NUMPAD_PAGEUP:
 783             case WXK_NUMPAD_PAGEDOWN:
 784             case WXK_NUMPAD_END:
 785             case WXK_NUMPAD_BEGIN:
 786             case WXK_NUMPAD_INSERT:
 787             case WXK_WINDOWS_LEFT:
 788             {
 789                 return;
 790             }
 791             default:
 792             {
 793             }
 794         }
 795
 796         // Must process this before translation, otherwise it's translated into a WXK_DELETE event.
 797         if (event.CmdDown() && event.GetKeyCode() == WXK_BACK)
 798         {
 799             BeginBatchUndo(_("Delete Text"));
 800
 801             long newPos = m_caretPosition;
 802
 803             bool processed = DeleteSelectedContent(& newPos);
 804
 805             // Submit range in character positions, which are greater than caret positions,
 806             // so subtract 1 for deleted character and add 1 for conversion to character position.
 807             if (newPos > -1)
 808             {
 809                 if (event.CmdDown())
 810                 {
 811                     long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 812                     if (pos < newPos)
 813                     {
 814                         GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this);
 815                         processed = true;
 816                     }
 817                 }
 818
 819                 if (!processed)
 820                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this);
 821             }
 822
 823             EndBatchUndo();
 824
 825             if (GetLastPosition() == -1)
 826             {
 827                 GetBuffer().Reset();
 828
 829                 m_caretPosition = -1;
 830                 PositionCaret();
 831                 SetDefaultStyleToCursorStyle();
 832             }
 833
 834             ScrollIntoView(m_caretPosition, WXK_LEFT);
 835
 836             wxRichTextEvent cmdEvent(
 837                 wxEVT_COMMAND_RICHTEXT_DELETE,
 838                 GetId());
 839             cmdEvent.SetEventObject(this);
 840             cmdEvent.SetFlags(flags);
 841             cmdEvent.SetPosition(m_caretPosition+1);
 842             GetEventHandler()->ProcessEvent(cmdEvent);
 843
 844             Update();
 845         }
 846         else
 847             event.Skip();
 848
 849         return;
 850     }
 851
 852     // all the other keys modify the controls contents which shouldn't be
 853     // possible if we're read-only
 854     if ( !IsEditable() )
 855     {
 856         event.Skip();
 857         return;
 858     }
 859
 860     if (event.GetKeyCode() == WXK_RETURN)
 861     {
 862         BeginBatchUndo(_("Insert Text"));
 863
 864         long newPos = m_caretPosition;
 865
 866         DeleteSelectedContent(& newPos);
 867
 868         if (event.ShiftDown())
 869         {
 870             wxString text;
 871             text = wxRichTextLineBreakChar;
 872             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 873             m_caretAtLineStart = true;
 874             PositionCaret();
 875         }
 876         else
 877             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE|wxRICHTEXT_INSERT_INTERACTIVE);
 878
 879         EndBatchUndo();
 880         SetDefaultStyleToCursorStyle();
 881
 882         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 883
 884         wxRichTextEvent cmdEvent(
 885             wxEVT_COMMAND_RICHTEXT_RETURN,
 886             GetId());
 887         cmdEvent.SetEventObject(this);
 888         cmdEvent.SetFlags(flags);
 889         cmdEvent.SetPosition(newPos+1);
 890
 891         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 892         {
 893             // Generate conventional event
 894             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 895             InitCommandEvent(textEvent);
 896
 897             GetEventHandler()->ProcessEvent(textEvent);
 898         }
 899         Update();
 900     }
 901     else if (event.GetKeyCode() == WXK_BACK)
 902     {
 903         BeginBatchUndo(_("Delete Text"));
 904
 905         long newPos = m_caretPosition;
 906
 907         bool processed = DeleteSelectedContent(& newPos);
 908
 909         // Submit range in character positions, which are greater than caret positions,
 910         // so subtract 1 for deleted character and add 1 for conversion to character position.
 911         if (newPos > -1)
 912         {
 913             if (event.CmdDown())
 914             {
 915                 long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 916                 if (pos < newPos)
 917                 {
 918                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this);
 919                     processed = true;
 920                 }
 921             }
 922
 923             if (!processed)
 924                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this);
 925         }
 926
 927         EndBatchUndo();
 928
 929         if (GetLastPosition() == -1)
 930         {
 931             GetBuffer().Reset();
 932
 933             m_caretPosition = -1;
 934             PositionCaret();
 935             SetDefaultStyleToCursorStyle();
 936         }
 937
 938         ScrollIntoView(m_caretPosition, WXK_LEFT);
 939
 940         wxRichTextEvent cmdEvent(
 941             wxEVT_COMMAND_RICHTEXT_DELETE,
 942             GetId());
 943         cmdEvent.SetEventObject(this);
 944         cmdEvent.SetFlags(flags);
 945         cmdEvent.SetPosition(m_caretPosition+1);
 946         GetEventHandler()->ProcessEvent(cmdEvent);
 947
 948         Update();
 949     }
 950     else if (event.GetKeyCode() == WXK_DELETE)
 951     {
 952         BeginBatchUndo(_("Delete Text"));
 953
 954         long newPos = m_caretPosition;
 955
 956         bool processed = DeleteSelectedContent(& newPos);
 957
 958         // Submit range in character positions, which are greater than caret positions,
 959         if (newPos < GetBuffer().GetRange().GetEnd()+1)
 960         {
 961             if (event.CmdDown())
 962             {
 963                 long pos = wxRichTextCtrl::FindNextWordPosition(1);
 964                 if (pos != -1 && (pos > newPos))
 965                 {
 966                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos+1, pos), this);
 967                     processed = true;
 968                 }
 969             }
 970
 971             if (!processed)
 972                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos+1, newPos+1), this);
 973         }
 974
 975         EndBatchUndo();
 976
 977         if (GetLastPosition() == -1)
 978         {
 979             GetBuffer().Reset();
 980
 981             m_caretPosition = -1;
 982             PositionCaret();
 983             SetDefaultStyleToCursorStyle();
 984         }
 985
 986         wxRichTextEvent cmdEvent(
 987             wxEVT_COMMAND_RICHTEXT_DELETE,
 988             GetId());
 989         cmdEvent.SetEventObject(this);
 990         cmdEvent.SetFlags(flags);
 991         cmdEvent.SetPosition(m_caretPosition+1);
 992         GetEventHandler()->ProcessEvent(cmdEvent);
 993
 994         Update();
 995     }
 996     else
 997     {
 998         long keycode = event.GetKeyCode();
 999         switch ( keycode )
1000         {
1001             case WXK_ESCAPE:
1002             {
1003                 event.Skip();
1004                 return;
1005             }
1006
1007             default:
1008             {
1009 #ifdef __WXMAC__
1010                 if (event.CmdDown())
1011 #else
1012                 // Fixes AltGr+key with European input languages on Windows
1013                 if ((event.CmdDown() && !event.AltDown()) || (event.AltDown() && !event.CmdDown()))
1014 #endif
1015                 {
1016                     event.Skip();
1017                     return;
1018                 }
1019
1020                 wxRichTextEvent cmdEvent(
1021                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
1022                     GetId());
1023                 cmdEvent.SetEventObject(this);
1024                 cmdEvent.SetFlags(flags);
1025 #if wxUSE_UNICODE
1026                 cmdEvent.SetCharacter(event.GetUnicodeKey());
1027 #else
1028                 cmdEvent.SetCharacter((wxChar) keycode);
1029 #endif
1030                 cmdEvent.SetPosition(m_caretPosition+1);
1031
1032                 if (keycode == wxT('\t'))
1033                 {
1034                     // See if we need to promote or demote the selection or paragraph at the cursor
1035                     // position, instead of inserting a tab.
1036                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
1037                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
1038                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
1039                     {
1040                         wxRichTextRange range;
1041                         if (HasSelection())
1042                             range = GetSelectionRange();
1043                         else
1044                             range = para->GetRange().FromInternal();
1045
1046                         int promoteBy = event.ShiftDown() ? 1 : -1;
1047
1048                         PromoteList(promoteBy, range, NULL);
1049
1050                         GetEventHandler()->ProcessEvent(cmdEvent);
1051
1052                         return;
1053                     }
1054                 }
1055
1056                 BeginBatchUndo(_("Insert Text"));
1057
1058                 long newPos = m_caretPosition;
1059                 DeleteSelectedContent(& newPos);
1060
1061 #if wxUSE_UNICODE
1062                 wxString str = event.GetUnicodeKey();
1063 #else
1064                 wxString str = (wxChar) event.GetKeyCode();
1065 #endif
1066                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
1067
1068                 EndBatchUndo();
1069
1070                 SetDefaultStyleToCursorStyle();
1071                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
1072
1073                 GetEventHandler()->ProcessEvent(cmdEvent);
1074
1075                 Update();
1076             }
1077         }
1078     }
1079 }
1080
1081 /// Delete content if there is a selection, e.g. when pressing a key.
1082 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
1083 {
1084     if (HasSelection())
1085     {
1086         long pos = m_selectionRange.GetStart();
1087         GetBuffer().DeleteRangeWithUndo(m_selectionRange, this);
1088         m_selectionRange.SetRange(-2, -2);
1089
1090         if (newPos)
1091             *newPos = pos-1;
1092         return true;
1093     }
1094     else
1095         return false;
1096 }
1097
1098 /// Keyboard navigation
1099
1100 /*
1101
1102 Left:       left one character
1103 Right:      right one character
1104 Up:         up one line
1105 Down:       down one line
1106 Ctrl-Left:  left one word
1107 Ctrl-Right: right one word
1108 Ctrl-Up:    previous paragraph start
1109 Ctrl-Down:  next start of paragraph
1110 Home:       start of line
1111 End:        end of line
1112 Ctrl-Home:  start of document
1113 Ctrl-End:   end of document
1114 Page-Up:    Up a screen
1115 Page-Down:  Down a screen
1116
1117 Maybe:
1118
1119 Ctrl-Alt-PgUp: Start of window
1120 Ctrl-Alt-PgDn: End of window
1121 F8:         Start selection mode
1122 Esc:        End selection mode
1123
1124 Adding Shift does the above but starts/extends selection.
1125
1126
1127  */
1128
1129 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
1130 {
1131     bool success = false;
1132
1133     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
1134     {
1135         if (flags & wxRICHTEXT_CTRL_DOWN)
1136             success = WordRight(1, flags);
1137         else
1138             success = MoveRight(1, flags);
1139     }
1140     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
1141     {
1142         if (flags & wxRICHTEXT_CTRL_DOWN)
1143             success = WordLeft(1, flags);
1144         else
1145             success = MoveLeft(1, flags);
1146     }
1147     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
1148     {
1149         if (flags & wxRICHTEXT_CTRL_DOWN)
1150             success = MoveToParagraphStart(flags);
1151         else
1152             success = MoveUp(1, flags);
1153     }
1154     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
1155     {
1156         if (flags & wxRICHTEXT_CTRL_DOWN)
1157             success = MoveToParagraphEnd(flags);
1158         else
1159             success = MoveDown(1, flags);
1160     }
1161     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
1162     {
1163         success = PageUp(1, flags);
1164     }
1165     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1166     {
1167         success = PageDown(1, flags);
1168     }
1169     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
1170     {
1171         if (flags & wxRICHTEXT_CTRL_DOWN)
1172             success = MoveHome(flags);
1173         else
1174             success = MoveToLineStart(flags);
1175     }
1176     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
1177     {
1178         if (flags & wxRICHTEXT_CTRL_DOWN)
1179             success = MoveEnd(flags);
1180         else
1181             success = MoveToLineEnd(flags);
1182     }
1183
1184     if (success)
1185     {
1186         ScrollIntoView(m_caretPosition, keyCode);
1187         SetDefaultStyleToCursorStyle();
1188     }
1189
1190     return success;
1191 }
1192
1193 /// Extend the selection. Selections are in caret positions.
1194 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
1195 {
1196     if (flags & wxRICHTEXT_SHIFT_DOWN)
1197     {
1198         if (oldPos == newPos)
1199             return false;
1200
1201         wxRichTextRange oldSelection = m_selectionRange;
1202
1203         // If not currently selecting, start selecting
1204         if (m_selectionRange.GetStart() == -2)
1205         {
1206             m_selectionAnchor = oldPos;
1207
1208             if (oldPos > newPos)
1209                 m_selectionRange.SetRange(newPos+1, oldPos);
1210             else
1211                 m_selectionRange.SetRange(oldPos+1, newPos);
1212         }
1213         else
1214         {
1215             // Always ensure that the selection range start is greater than
1216             // the end.
1217             if (newPos > m_selectionAnchor)
1218                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
1219             else if (newPos == m_selectionAnchor)
1220                 m_selectionRange = wxRichTextRange(-2, -2);
1221             else
1222                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
1223         }
1224
1225         RefreshForSelectionChange(oldSelection, m_selectionRange);
1226
1227         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
1228         {
1229             wxLogDebug(wxT("Strange selection range"));
1230         }
1231
1232         return true;
1233     }
1234     else
1235         return false;
1236 }
1237
1238 /// Scroll into view, returning true if we scrolled.
1239 /// This takes a _caret_ position.
1240 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1241 {
1242     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1243
1244     if (!line)
1245         return false;
1246
1247     int ppuX, ppuY;
1248     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1249
1250     int startXUnits, startYUnits;
1251     GetViewStart(& startXUnits, & startYUnits);
1252     int startY = startYUnits * ppuY;
1253
1254     int sx = 0, sy = 0;
1255     GetVirtualSize(& sx, & sy);
1256     int sxUnits = 0;
1257     int syUnits = 0;
1258     if (ppuY != 0)
1259         syUnits = sy/ppuY;
1260
1261     wxRect rect = line->GetRect();
1262
1263     bool scrolled = false;
1264
1265     wxSize clientSize = GetClientSize();
1266     clientSize.y -= GetBuffer().GetBottomMargin();
1267
1268     if (GetWindowStyle() & wxRE_CENTRE_CARET)
1269     {
1270         int y = rect.y - GetClientSize().y/2;
1271         int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1272         if (y >= 0 && (y + clientSize.y) < GetBuffer().GetCachedSize().y)
1273         {
1274             if (startYUnits != yUnits)
1275             {
1276                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1277                 scrolled = true;
1278             }
1279 #if !wxRICHTEXT_USE_OWN_CARET
1280             if (scrolled)
1281 #endif
1282                 PositionCaret();
1283
1284             return scrolled;
1285         }
1286     }
1287
1288     // Going down
1289     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1290         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1291         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1292         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1293     {
1294         if ((rect.y + rect.height) > (clientSize.y + startY))
1295         {
1296             // Make it scroll so this item is at the bottom
1297             // of the window
1298             int y = rect.y - (clientSize.y - rect.height);
1299             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1300
1301             // If we're still off the screen, scroll another line down
1302             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1303                 yUnits ++;
1304
1305             if (startYUnits != yUnits)
1306             {
1307                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1308                 scrolled = true;
1309             }
1310         }
1311         else if (rect.y < (startY + GetBuffer().GetTopMargin()))
1312         {
1313             // Make it scroll so this item is at the top
1314             // of the window
1315             int y = rect.y - GetBuffer().GetTopMargin();
1316             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1317
1318             if (startYUnits != yUnits)
1319             {
1320                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1321                 scrolled = true;
1322             }
1323         }
1324     }
1325     // Going up
1326     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1327              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1328              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1329              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1330     {
1331         if (rect.y < (startY + GetBuffer().GetBottomMargin()))
1332         {
1333             // Make it scroll so this item is at the top
1334             // of the window
1335             int y = rect.y - GetBuffer().GetTopMargin();
1336             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1337
1338             if (startYUnits != yUnits)
1339             {
1340                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1341                 scrolled = true;
1342             }
1343         }
1344         else if ((rect.y + rect.height) > (clientSize.y + startY))
1345         {
1346             // Make it scroll so this item is at the bottom
1347             // of the window
1348             int y = rect.y - (clientSize.y - rect.height);
1349             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1350
1351             // If we're still off the screen, scroll another line down
1352             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1353                 yUnits ++;
1354
1355             if (startYUnits != yUnits)
1356             {
1357                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1358                 scrolled = true;
1359             }
1360         }
1361     }
1362
1363 #if !wxRICHTEXT_USE_OWN_CARET
1364     if (scrolled)
1365 #endif
1366         PositionCaret();
1367
1368     return scrolled;
1369 }
1370
1371 /// Is the given position visible on the screen?
1372 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1373 {
1374     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1375
1376     if (!line)
1377         return false;
1378
1379     int ppuX, ppuY;
1380     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1381
1382     int startX, startY;
1383     GetViewStart(& startX, & startY);
1384     startX = 0;
1385     startY = startY * ppuY;
1386
1387     wxRect rect = line->GetRect();
1388     wxSize clientSize = GetClientSize();
1389     clientSize.y -= GetBuffer().GetBottomMargin();
1390
1391     return (rect.GetBottom() > (startY + GetBuffer().GetTopMargin())) && (rect.GetTop() < (startY + clientSize.y));
1392 }
1393
1394 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1395 {
1396     m_caretPosition = position;
1397     m_caretAtLineStart = showAtLineStart;
1398 }
1399
1400 /// Move caret one visual step forward: this may mean setting a flag
1401 /// and keeping the same position if we're going from the end of one line
1402 /// to the start of the next, which may be the exact same caret position.
1403 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1404 {
1405     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1406
1407     // Only do the check if we're not at the end of the paragraph (where things work OK
1408     // anyway)
1409     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1410     {
1411         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1412
1413         if (line)
1414         {
1415             wxRichTextRange lineRange = line->GetAbsoluteRange();
1416
1417             // We're at the end of a line. See whether we need to
1418             // stay at the same actual caret position but change visual
1419             // position, or not.
1420             if (oldPosition == lineRange.GetEnd())
1421             {
1422                 if (m_caretAtLineStart)
1423                 {
1424                     // We're already at the start of the line, so actually move on now.
1425                     m_caretPosition = oldPosition + 1;
1426                     m_caretAtLineStart = false;
1427                 }
1428                 else
1429                 {
1430                     // We're showing at the end of the line, so keep to
1431                     // the same position but indicate that we're to show
1432                     // at the start of the next line.
1433                     m_caretPosition = oldPosition;
1434                     m_caretAtLineStart = true;
1435                 }
1436                 SetDefaultStyleToCursorStyle();
1437                 return;
1438             }
1439         }
1440     }
1441     m_caretPosition ++;
1442     SetDefaultStyleToCursorStyle();
1443 }
1444
1445 /// Move caret one visual step backward: this may mean setting a flag
1446 /// and keeping the same position if we're going from the end of one line
1447 /// to the start of the next, which may be the exact same caret position.
1448 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1449 {
1450     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1451
1452     // Only do the check if we're not at the start of the paragraph (where things work OK
1453     // anyway)
1454     if (para && (oldPosition != para->GetRange().GetStart()))
1455     {
1456         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1457
1458         if (line)
1459         {
1460             wxRichTextRange lineRange = line->GetAbsoluteRange();
1461
1462             // We're at the start of a line. See whether we need to
1463             // stay at the same actual caret position but change visual
1464             // position, or not.
1465             if (oldPosition == lineRange.GetStart())
1466             {
1467                 m_caretPosition = oldPosition-1;
1468                 m_caretAtLineStart = true;
1469                 return;
1470             }
1471             else if (oldPosition == lineRange.GetEnd())
1472             {
1473                 if (m_caretAtLineStart)
1474                 {
1475                     // We're at the start of the line, so keep the same caret position
1476                     // but clear the start-of-line flag.
1477                     m_caretPosition = oldPosition;
1478                     m_caretAtLineStart = false;
1479                 }
1480                 else
1481                 {
1482                     // We're showing at the end of the line, so go back
1483                     // to the previous character position.
1484                     m_caretPosition = oldPosition - 1;
1485                 }
1486                 SetDefaultStyleToCursorStyle();
1487                 return;
1488             }
1489         }
1490     }
1491     m_caretPosition --;
1492     SetDefaultStyleToCursorStyle();
1493 }
1494
1495 /// Move right
1496 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1497 {
1498     long endPos = GetBuffer().GetRange().GetEnd();
1499
1500     if (m_caretPosition + noPositions < endPos)
1501     {
1502         long oldPos = m_caretPosition;
1503         long newPos = m_caretPosition + noPositions;
1504
1505         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1506         if (!extendSel)
1507             SelectNone();
1508
1509         // Determine by looking at oldPos and m_caretPosition whether
1510         // we moved from the end of a line to the start of the next line, in which case
1511         // we want to adjust the caret position such that it is positioned at the
1512         // start of the next line, rather than jumping past the first character of the
1513         // line.
1514         if (noPositions == 1 && !extendSel)
1515             MoveCaretForward(oldPos);
1516         else
1517             SetCaretPosition(newPos);
1518
1519         PositionCaret();
1520         SetDefaultStyleToCursorStyle();
1521
1522         return true;
1523     }
1524     else
1525         return false;
1526 }
1527
1528 /// Move left
1529 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1530 {
1531     long startPos = -1;
1532
1533     if (m_caretPosition > startPos - noPositions + 1)
1534     {
1535         long oldPos = m_caretPosition;
1536         long newPos = m_caretPosition - noPositions;
1537         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1538         if (!extendSel)
1539             SelectNone();
1540
1541         if (noPositions == 1 && !extendSel)
1542             MoveCaretBack(oldPos);
1543         else
1544             SetCaretPosition(newPos);
1545
1546         PositionCaret();
1547         SetDefaultStyleToCursorStyle();
1548
1549         return true;
1550     }
1551     else
1552         return false;
1553 }
1554
1555 /// Move up
1556 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1557 {
1558     return MoveDown(- noLines, flags);
1559 }
1560
1561 /// Move up
1562 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1563 {
1564     if (!GetCaret())
1565         return false;
1566
1567     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1568     wxPoint pt = GetCaret()->GetPosition();
1569     long newLine = lineNumber + noLines;
1570
1571     if (lineNumber != -1)
1572     {
1573         if (noLines > 0)
1574         {
1575             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1576
1577             if (newLine > lastLine)
1578                 return false;
1579         }
1580         else
1581         {
1582             if (newLine < 0)
1583                 return false;
1584         }
1585     }
1586
1587     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1588     if (lineObj)
1589     {
1590         pt.y = lineObj->GetAbsolutePosition().y + 2;
1591     }
1592     else
1593         return false;
1594
1595     long newPos = 0;
1596     wxClientDC dc(this);
1597     PrepareDC(dc);
1598     dc.SetFont(GetFont());
1599
1600     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1601
1602     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1603     {
1604         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1605         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1606         // so we view the caret at the start of the line.
1607         bool caretLineStart = false;
1608         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1609         {
1610             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1611             wxRichTextRange lineRange;
1612             if (thisLine)
1613                 lineRange = thisLine->GetAbsoluteRange();
1614
1615             if (thisLine && (newPos-1) == lineRange.GetEnd())
1616             {
1617                 newPos --;
1618                 caretLineStart = true;
1619             }
1620             else
1621             {
1622                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1623                 if (para && para->GetRange().GetStart() == newPos)
1624                     newPos --;
1625             }
1626         }
1627
1628         long newSelEnd = newPos;
1629
1630         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1631         if (!extendSel)
1632             SelectNone();
1633
1634         SetCaretPosition(newPos, caretLineStart);
1635         PositionCaret();
1636         SetDefaultStyleToCursorStyle();
1637
1638         return true;
1639     }
1640
1641     return false;
1642 }
1643
1644 /// Move to the end of the paragraph
1645 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1646 {
1647     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1648     if (para)
1649     {
1650         long newPos = para->GetRange().GetEnd() - 1;
1651         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1652         if (!extendSel)
1653             SelectNone();
1654
1655         SetCaretPosition(newPos);
1656         PositionCaret();
1657         SetDefaultStyleToCursorStyle();
1658
1659         return true;
1660     }
1661
1662     return false;
1663 }
1664
1665 /// Move to the start of the paragraph
1666 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1667 {
1668     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1669     if (para)
1670     {
1671         long newPos = para->GetRange().GetStart() - 1;
1672         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1673         if (!extendSel)
1674             SelectNone();
1675
1676         SetCaretPosition(newPos);
1677         PositionCaret();
1678         SetDefaultStyleToCursorStyle();
1679
1680         return true;
1681     }
1682
1683     return false;
1684 }
1685
1686 /// Move to the end of the line
1687 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1688 {
1689     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1690
1691     if (line)
1692     {
1693         wxRichTextRange lineRange = line->GetAbsoluteRange();
1694         long newPos = lineRange.GetEnd();
1695         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1696         if (!extendSel)
1697             SelectNone();
1698
1699         SetCaretPosition(newPos);
1700         PositionCaret();
1701         SetDefaultStyleToCursorStyle();
1702
1703         return true;
1704     }
1705
1706     return false;
1707 }
1708
1709 /// Move to the start of the line
1710 bool wxRichTextCtrl::MoveToLineStart(int flags)
1711 {
1712     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1713     if (line)
1714     {
1715         wxRichTextRange lineRange = line->GetAbsoluteRange();
1716         long newPos = lineRange.GetStart()-1;
1717
1718         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1719         if (!extendSel)
1720             SelectNone();
1721
1722         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1723
1724         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1725         PositionCaret();
1726         SetDefaultStyleToCursorStyle();
1727
1728         return true;
1729     }
1730
1731     return false;
1732 }
1733
1734 /// Move to the start of the buffer
1735 bool wxRichTextCtrl::MoveHome(int flags)
1736 {
1737     if (m_caretPosition != -1)
1738     {
1739         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1740         if (!extendSel)
1741             SelectNone();
1742
1743         SetCaretPosition(-1);
1744         PositionCaret();
1745         SetDefaultStyleToCursorStyle();
1746
1747         return true;
1748     }
1749     else
1750         return false;
1751 }
1752
1753 /// Move to the end of the buffer
1754 bool wxRichTextCtrl::MoveEnd(int flags)
1755 {
1756     long endPos = GetBuffer().GetRange().GetEnd()-1;
1757
1758     if (m_caretPosition != endPos)
1759     {
1760         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1761         if (!extendSel)
1762             SelectNone();
1763
1764         SetCaretPosition(endPos);
1765         PositionCaret();
1766         SetDefaultStyleToCursorStyle();
1767
1768         return true;
1769     }
1770     else
1771         return false;
1772 }
1773
1774 /// Move noPages pages up
1775 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1776 {
1777     return PageDown(- noPages, flags);
1778 }
1779
1780 /// Move noPages pages down
1781 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1782 {
1783     // Calculate which line occurs noPages * screen height further down.
1784     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1785     if (line)
1786     {
1787         wxSize clientSize = GetClientSize();
1788         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1789
1790         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1791         if (newLine)
1792         {
1793             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1794             long pos = lineRange.GetStart()-1;
1795             if (pos != m_caretPosition)
1796             {
1797                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1798
1799                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1800                 if (!extendSel)
1801                     SelectNone();
1802
1803                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1804                 PositionCaret();
1805                 SetDefaultStyleToCursorStyle();
1806
1807                 return true;
1808             }
1809         }
1810     }
1811
1812     return false;
1813 }
1814
1815 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1816 {
1817     return str == wxT(" ") || str == wxT("\t");
1818 }
1819
1820 // Finds the caret position for the next word
1821 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1822 {
1823     long endPos = GetBuffer().GetRange().GetEnd();
1824
1825     if (direction > 0)
1826     {
1827         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1828
1829         // First skip current text to space
1830         while (i < endPos && i > -1)
1831         {
1832             // i is in character, not caret positions
1833             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1834             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1835             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1836             {
1837                 break;
1838             }
1839             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1840                 i += direction;
1841             else
1842             {
1843                 break;
1844             }
1845         }
1846         while (i < endPos && i > -1)
1847         {
1848             // i is in character, not caret positions
1849             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1850             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1851             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1852                 return wxMax(-1, i);
1853
1854             if (text.empty()) // End of paragraph, or maybe an image
1855                 return wxMax(-1, i - 1);
1856             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1857                 i += direction;
1858             else
1859             {
1860                 // Convert to caret position
1861                 return wxMax(-1, i - 1);
1862             }
1863         }
1864         if (i >= endPos)
1865             return endPos-1;
1866         return i-1;
1867     }
1868     else
1869     {
1870         long i = m_caretPosition;
1871
1872         // First skip white space
1873         while (i < endPos && i > -1)
1874         {
1875             // i is in character, not caret positions
1876             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1877             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1878
1879             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1880                 break;
1881             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1882                 i += direction;
1883             else
1884                 break;
1885         }
1886         // Next skip current text to space
1887         while (i < endPos && i > -1)
1888         {
1889             // i is in character, not caret positions
1890             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1891             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1892             if (line && line->GetAbsoluteRange().GetStart() == i)
1893                 return i-1;
1894
1895             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1896                 i += direction;
1897             else
1898             {
1899                 return i;
1900             }
1901         }
1902         if (i < -1)
1903             return -1;
1904         return i;
1905     }
1906 }
1907
1908 /// Move n words left
1909 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1910 {
1911     long pos = FindNextWordPosition(-1);
1912     if (pos != m_caretPosition)
1913     {
1914         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1915
1916         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1917         if (!extendSel)
1918             SelectNone();
1919
1920         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1921         PositionCaret();
1922         SetDefaultStyleToCursorStyle();
1923
1924         return true;
1925     }
1926
1927     return false;
1928 }
1929
1930 /// Move n words right
1931 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1932 {
1933     long pos = FindNextWordPosition(1);
1934     if (pos != m_caretPosition)
1935     {
1936         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1937
1938         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1939         if (!extendSel)
1940             SelectNone();
1941
1942         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1943         PositionCaret();
1944         SetDefaultStyleToCursorStyle();
1945
1946         return true;
1947     }
1948
1949     return false;
1950 }
1951
1952 /// Sizing
1953 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1954 {
1955     // Only do sizing optimization for large buffers
1956     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1957     {
1958         m_fullLayoutRequired = true;
1959         m_fullLayoutTime = wxGetLocalTimeMillis();
1960         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1961         LayoutContent(true /* onlyVisibleRect */);
1962     }
1963     else
1964         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1965
1966 #if wxRICHTEXT_BUFFERED_PAINTING
1967     RecreateBuffer();
1968 #endif
1969
1970     event.Skip();
1971 }
1972
1973
1974 /// Idle-time processing
1975 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1976 {
1977 #if wxRICHTEXT_USE_OWN_CARET
1978     if (((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
1979     {
1980         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate(false);
1981         PositionCaret();
1982         GetCaret()->Show();
1983     }
1984 #endif
1985
1986     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1987
1988     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1989     {
1990         m_fullLayoutRequired = false;
1991         m_fullLayoutTime = 0;
1992         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1993         ShowPosition(m_fullLayoutSavedPosition);
1994         Refresh(false);
1995     }
1996
1997     if (m_caretPositionForDefaultStyle != -2)
1998     {
1999         // If the caret position has changed, no longer reflect the default style
2000         // in the UI.
2001         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
2002             m_caretPositionForDefaultStyle = -2;
2003     }
2004
2005     event.Skip();
2006 }
2007
2008 /// Scrolling
2009 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
2010 {
2011 #if wxRICHTEXT_USE_OWN_CARET
2012     if (!((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
2013     {
2014         GetCaret()->Hide();
2015         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate();
2016     }
2017 #endif
2018
2019     event.Skip();
2020 }
2021
2022 /// Set up scrollbars, e.g. after a resize
2023 void wxRichTextCtrl::SetupScrollbars(bool atTop)
2024 {
2025     if (IsFrozen())
2026         return;
2027
2028     if (GetBuffer().IsEmpty())
2029     {
2030         SetScrollbars(0, 0, 0, 0, 0, 0);
2031         return;
2032     }
2033
2034     // TODO: reimplement scrolling so we scroll by line, not by fixed number
2035     // of pixels. See e.g. wxVScrolledWindow for ideas.
2036     int pixelsPerUnit = 5;
2037     wxSize clientSize = GetClientSize();
2038
2039     int maxHeight = GetBuffer().GetCachedSize().y + GetBuffer().GetTopMargin();
2040
2041     // Round up so we have at least maxHeight pixels
2042     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
2043
2044     int startX = 0, startY = 0;
2045     if (!atTop)
2046         GetViewStart(& startX, & startY);
2047
2048     int maxPositionX = 0;
2049     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
2050
2051     int newStartX = wxMin(maxPositionX, startX);
2052     int newStartY = wxMin(maxPositionY, startY);
2053
2054     int oldPPUX, oldPPUY;
2055     int oldStartX, oldStartY;
2056     int oldVirtualSizeX = 0, oldVirtualSizeY = 0;
2057     GetScrollPixelsPerUnit(& oldPPUX, & oldPPUY);
2058     GetViewStart(& oldStartX, & oldStartY);
2059     GetVirtualSize(& oldVirtualSizeX, & oldVirtualSizeY);
2060     if (oldPPUY > 0)
2061         oldVirtualSizeY /= oldPPUY;
2062
2063     if (oldPPUX == 0 && oldPPUY == pixelsPerUnit && oldVirtualSizeY == unitsY && oldStartX == newStartX && oldStartY == newStartY)
2064         return;
2065
2066     // Don't set scrollbars if there were none before, and there will be none now.
2067     if (oldPPUY != 0 && (oldVirtualSizeY < clientSize.y) && (unitsY*pixelsPerUnit < clientSize.y))
2068         return;
2069
2070     // Move to previous scroll position if
2071     // possible
2072     SetScrollbars(0, pixelsPerUnit, 0, unitsY, newStartX, newStartY);
2073 }
2074
2075 /// Paint the background
2076 void wxRichTextCtrl::PaintBackground(wxDC& dc)
2077 {
2078     wxColour backgroundColour = GetBackgroundColour();
2079     if (!backgroundColour.Ok())
2080         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
2081
2082     // Clear the background
2083     dc.SetBrush(wxBrush(backgroundColour));
2084     dc.SetPen(*wxTRANSPARENT_PEN);
2085     wxRect windowRect(GetClientSize());
2086     windowRect.x -= 2; windowRect.y -= 2;
2087     windowRect.width += 4; windowRect.height += 4;
2088
2089     // We need to shift the rectangle to take into account
2090     // scrolling. Converting device to logical coordinates.
2091     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
2092     dc.DrawRectangle(windowRect);
2093 }
2094
2095 #if wxRICHTEXT_BUFFERED_PAINTING
2096 /// Recreate buffer bitmap if necessary
2097 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
2098 {
2099     wxSize sz = size;
2100     if (sz == wxDefaultSize)
2101         sz = GetClientSize();
2102
2103     if (sz.x < 1 || sz.y < 1)
2104         return false;
2105
2106     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
2107         m_bufferBitmap = wxBitmap(sz.x, sz.y);
2108     return m_bufferBitmap.Ok();
2109 }
2110 #endif
2111
2112 // ----------------------------------------------------------------------------
2113 // file IO functions
2114 // ----------------------------------------------------------------------------
2115
2116 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
2117 {
2118     bool success = GetBuffer().LoadFile(filename, (wxRichTextFileType)fileType);
2119     if (success)
2120         m_filename = filename;
2121
2122     DiscardEdits();
2123     SetInsertionPoint(0);
2124     LayoutContent();
2125     PositionCaret();
2126     SetupScrollbars(true);
2127     Refresh(false);
2128     wxTextCtrl::SendTextUpdatedEvent(this);
2129
2130     if (success)
2131         return true;
2132     else
2133     {
2134         wxLogError(_("File couldn't be loaded."));
2135
2136         return false;
2137     }
2138 }
2139
2140 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
2141 {
2142     if (GetBuffer().SaveFile(filename, (wxRichTextFileType)fileType))
2143     {
2144         m_filename = filename;
2145
2146         DiscardEdits();
2147
2148         return true;
2149     }
2150
2151     wxLogError(_("The text couldn't be saved."));
2152
2153     return false;
2154 }
2155
2156 // ----------------------------------------------------------------------------
2157 // wxRichTextCtrl specific functionality
2158 // ----------------------------------------------------------------------------
2159
2160 /// Add a new paragraph of text to the end of the buffer
2161 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
2162 {
2163     wxRichTextRange range = GetBuffer().AddParagraph(text);
2164     LayoutContent();
2165     return range;
2166 }
2167
2168 /// Add an image
2169 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
2170 {
2171     wxRichTextRange range = GetBuffer().AddImage(image);
2172     LayoutContent();
2173     return range;
2174 }
2175
2176 // ----------------------------------------------------------------------------
2177 // selection and ranges
2178 // ----------------------------------------------------------------------------
2179
2180 void wxRichTextCtrl::SelectAll()
2181 {
2182     SetSelection(0, GetLastPosition()+1);
2183     m_selectionAnchor = -1;
2184 }
2185
2186 /// Select none
2187 void wxRichTextCtrl::SelectNone()
2188 {
2189     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
2190     {
2191         wxRichTextRange oldSelection = m_selectionRange;
2192
2193         m_selectionRange = wxRichTextRange(-2, -2);
2194
2195         RefreshForSelectionChange(oldSelection, m_selectionRange);
2196     }
2197     m_selectionAnchor = -2;
2198 }
2199
2200 static bool wxIsWordDelimiter(const wxString& text)
2201 {
2202     return !text.IsEmpty() && !wxIsalnum(text[0]);
2203 }
2204
2205 /// Select the word at the given character position
2206 bool wxRichTextCtrl::SelectWord(long position)
2207 {
2208     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
2209         return false;
2210
2211     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
2212     if (!para)
2213         return false;
2214
2215     if (position == para->GetRange().GetEnd())
2216         position --;
2217
2218     long positionStart = position;
2219     long positionEnd = position;
2220
2221     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
2222     {
2223         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
2224         if (wxIsWordDelimiter(text))
2225         {
2226             positionStart ++;
2227             break;
2228         }
2229     }
2230     if (positionStart < para->GetRange().GetStart())
2231         positionStart = para->GetRange().GetStart();
2232
2233     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
2234     {
2235         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
2236         if (wxIsWordDelimiter(text))
2237         {
2238             positionEnd --;
2239             break;
2240         }
2241     }
2242     if (positionEnd >= para->GetRange().GetEnd())
2243         positionEnd = para->GetRange().GetEnd();
2244
2245     if (positionEnd < positionStart)
2246         return false;
2247
2248     SetSelection(positionStart, positionEnd+1);
2249
2250     if (positionStart >= 0)
2251     {
2252         MoveCaret(positionStart-1, true);
2253         SetDefaultStyleToCursorStyle();
2254     }
2255
2256     return true;
2257 }
2258
2259 wxString wxRichTextCtrl::GetStringSelection() const
2260 {
2261     long from, to;
2262     GetSelection(&from, &to);
2263
2264     return GetRange(from, to);
2265 }
2266
2267 // ----------------------------------------------------------------------------
2268 // hit testing
2269 // ----------------------------------------------------------------------------
2270
2271 wxTextCtrlHitTestResult
2272 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2273 {
2274     // implement in terms of the other overload as the native ports typically
2275     // can get the position and not (x, y) pair directly (although wxUniv
2276     // directly gets x and y -- and so overrides this method as well)
2277     long pos;
2278     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2279
2280     if ( rc != wxTE_HT_UNKNOWN )
2281     {
2282         PositionToXY(pos, x, y);
2283     }
2284
2285     return rc;
2286 }
2287
2288 wxTextCtrlHitTestResult
2289 wxRichTextCtrl::HitTest(const wxPoint& pt,
2290                         long * pos) const
2291 {
2292     wxClientDC dc((wxRichTextCtrl*) this);
2293     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2294
2295     // Buffer uses logical position (relative to start of buffer)
2296     // so convert
2297     wxPoint pt2 = GetLogicalPoint(pt);
2298
2299     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
2300
2301     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2302         return wxTE_HT_BEFORE;
2303     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2304         return wxTE_HT_BEYOND;
2305     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2306         return wxTE_HT_ON_TEXT;
2307
2308     return wxTE_HT_UNKNOWN;
2309 }
2310
2311 // ----------------------------------------------------------------------------
2312 // set/get the controls text
2313 // ----------------------------------------------------------------------------
2314
2315 wxString wxRichTextCtrl::DoGetValue() const
2316 {
2317     return GetBuffer().GetText();
2318 }
2319
2320 wxString wxRichTextCtrl::GetRange(long from, long to) const
2321 {
2322     // Public API for range is different from internals
2323     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2324 }
2325
2326 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2327 {
2328     // Don't call Clear here, since it always sends a text updated event
2329     m_buffer.ResetAndClearCommands();
2330     m_buffer.SetDirty(true);
2331     m_caretPosition = -1;
2332     m_caretPositionForDefaultStyle = -2;
2333     m_caretAtLineStart = false;
2334     m_selectionRange.SetRange(-2, -2);
2335
2336     Scroll(0,0);
2337
2338     if (!IsFrozen())
2339     {
2340         LayoutContent();
2341         Refresh(false);
2342     }
2343
2344     if (!value.IsEmpty())
2345     {
2346         // Remove empty paragraph
2347         GetBuffer().Clear();
2348         DoWriteText(value, flags);
2349
2350         // for compatibility, don't move the cursor when doing SetValue()
2351         SetInsertionPoint(0);
2352     }
2353     else
2354     {
2355         // still send an event for consistency
2356         if (flags & SetValue_SendEvent)
2357             wxTextCtrl::SendTextUpdatedEvent(this);
2358     }
2359     DiscardEdits();
2360 }
2361
2362 void wxRichTextCtrl::WriteText(const wxString& value)
2363 {
2364     DoWriteText(value);
2365 }
2366
2367 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2368 {
2369     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2370
2371     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2372
2373     if ( flags & SetValue_SendEvent )
2374         wxTextCtrl::SendTextUpdatedEvent(this);
2375 }
2376
2377 void wxRichTextCtrl::AppendText(const wxString& text)
2378 {
2379     SetInsertionPointEnd();
2380
2381     WriteText(text);
2382 }
2383
2384 /// Write an image at the current insertion point
2385 bool wxRichTextCtrl::WriteImage(const wxImage& image, wxBitmapType bitmapType)
2386 {
2387     wxRichTextImageBlock imageBlock;
2388
2389     wxImage image2 = image;
2390     if (imageBlock.MakeImageBlock(image2, bitmapType))
2391         return WriteImage(imageBlock);
2392
2393     return false;
2394 }
2395
2396 bool wxRichTextCtrl::WriteImage(const wxString& filename, wxBitmapType bitmapType)
2397 {
2398     wxRichTextImageBlock imageBlock;
2399
2400     wxImage image;
2401     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2402         return WriteImage(imageBlock);
2403
2404     return false;
2405 }
2406
2407 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2408 {
2409     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2410 }
2411
2412 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, wxBitmapType bitmapType)
2413 {
2414     if (bitmap.Ok())
2415     {
2416         wxRichTextImageBlock imageBlock;
2417
2418         wxImage image = bitmap.ConvertToImage();
2419         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2420             return WriteImage(imageBlock);
2421     }
2422
2423     return false;
2424 }
2425
2426 /// Insert a newline (actually paragraph) at the current insertion point.
2427 bool wxRichTextCtrl::Newline()
2428 {
2429     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2430 }
2431
2432 /// Insert a line break at the current insertion point.
2433 bool wxRichTextCtrl::LineBreak()
2434 {
2435     wxString text;
2436     text = wxRichTextLineBreakChar;
2437     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2438 }
2439
2440 // ----------------------------------------------------------------------------
2441 // Clipboard operations
2442 // ----------------------------------------------------------------------------
2443
2444 void wxRichTextCtrl::Copy()
2445 {
2446     if (CanCopy())
2447     {
2448         wxRichTextRange range = GetInternalSelectionRange();
2449         GetBuffer().CopyToClipboard(range);
2450     }
2451 }
2452
2453 void wxRichTextCtrl::Cut()
2454 {
2455     if (CanCut())
2456     {
2457         wxRichTextRange range = GetInternalSelectionRange();
2458         GetBuffer().CopyToClipboard(range);
2459
2460         DeleteSelectedContent();
2461         LayoutContent();
2462         Refresh(false);
2463     }
2464 }
2465
2466 void wxRichTextCtrl::Paste()
2467 {
2468     if (CanPaste())
2469     {
2470         BeginBatchUndo(_("Paste"));
2471
2472         long newPos = m_caretPosition;
2473         DeleteSelectedContent(& newPos);
2474
2475         GetBuffer().PasteFromClipboard(newPos);
2476
2477         EndBatchUndo();
2478     }
2479 }
2480
2481 void wxRichTextCtrl::DeleteSelection()
2482 {
2483     if (CanDeleteSelection())
2484     {
2485         DeleteSelectedContent();
2486     }
2487 }
2488
2489 bool wxRichTextCtrl::HasSelection() const
2490 {
2491     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2492 }
2493
2494 bool wxRichTextCtrl::CanCopy() const
2495 {
2496     // Can copy if there's a selection
2497     return HasSelection();
2498 }
2499
2500 bool wxRichTextCtrl::CanCut() const
2501 {
2502     return HasSelection() && IsEditable();
2503 }
2504
2505 bool wxRichTextCtrl::CanPaste() const
2506 {
2507     if ( !IsEditable() )
2508         return false;
2509
2510     return GetBuffer().CanPasteFromClipboard();
2511 }
2512
2513 bool wxRichTextCtrl::CanDeleteSelection() const
2514 {
2515     return HasSelection() && IsEditable();
2516 }
2517
2518
2519 // ----------------------------------------------------------------------------
2520 // Accessors
2521 // ----------------------------------------------------------------------------
2522
2523 void wxRichTextCtrl::SetEditable(bool editable)
2524 {
2525     m_editable = editable;
2526 }
2527
2528 void wxRichTextCtrl::SetInsertionPoint(long pos)
2529 {
2530     SelectNone();
2531
2532     m_caretPosition = pos - 1;
2533
2534     PositionCaret();
2535 }
2536
2537 void wxRichTextCtrl::SetInsertionPointEnd()
2538 {
2539     long pos = GetLastPosition();
2540     SetInsertionPoint(pos);
2541 }
2542
2543 long wxRichTextCtrl::GetInsertionPoint() const
2544 {
2545     return m_caretPosition+1;
2546 }
2547
2548 wxTextPos wxRichTextCtrl::GetLastPosition() const
2549 {
2550     return GetBuffer().GetRange().GetEnd();
2551 }
2552
2553 // If the return values from and to are the same, there is no
2554 // selection.
2555 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2556 {
2557     *from = m_selectionRange.GetStart();
2558     *to = m_selectionRange.GetEnd();
2559     if ((*to) != -1 && (*to) != -2)
2560         (*to) ++;
2561 }
2562
2563 bool wxRichTextCtrl::IsEditable() const
2564 {
2565     return m_editable;
2566 }
2567
2568 // ----------------------------------------------------------------------------
2569 // selection
2570 // ----------------------------------------------------------------------------
2571
2572 void wxRichTextCtrl::SetSelection(long from, long to)
2573 {
2574     // if from and to are both -1, it means (in wxWidgets) that all text should
2575     // be selected.
2576     if ( (from == -1) && (to == -1) )
2577     {
2578         from = 0;
2579         to = GetLastPosition()+1;
2580     }
2581
2582     if (from == to)
2583     {
2584         SelectNone();
2585     }
2586     else
2587     {
2588         wxRichTextRange oldSelection = m_selectionRange;
2589         m_selectionAnchor = from;
2590         m_selectionRange.SetRange(from, to-1);
2591         if (from > -2)
2592             m_caretPosition = from-1;
2593
2594         RefreshForSelectionChange(oldSelection, m_selectionRange);
2595         PositionCaret();
2596     }
2597 }
2598
2599 // ----------------------------------------------------------------------------
2600 // Editing
2601 // ----------------------------------------------------------------------------
2602
2603 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2604                              const wxString& value)
2605 {
2606     BeginBatchUndo(_("Replace"));
2607
2608     DeleteSelectedContent();
2609
2610     DoWriteText(value, SetValue_SelectionOnly);
2611
2612     EndBatchUndo();
2613 }
2614
2615 void wxRichTextCtrl::Remove(long from, long to)
2616 {
2617     SelectNone();
2618
2619     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to-1), this);
2620
2621     LayoutContent();
2622     if (!IsFrozen())
2623         Refresh(false);
2624 }
2625
2626 bool wxRichTextCtrl::IsModified() const
2627 {
2628     return m_buffer.IsModified();
2629 }
2630
2631 void wxRichTextCtrl::MarkDirty()
2632 {
2633     m_buffer.Modify(true);
2634 }
2635
2636 void wxRichTextCtrl::DiscardEdits()
2637 {
2638     m_caretPositionForDefaultStyle = -2;
2639     m_buffer.Modify(false);
2640     m_buffer.GetCommandProcessor()->ClearCommands();
2641 }
2642
2643 int wxRichTextCtrl::GetNumberOfLines() const
2644 {
2645     return GetBuffer().GetParagraphCount();
2646 }
2647
2648 // ----------------------------------------------------------------------------
2649 // Positions <-> coords
2650 // ----------------------------------------------------------------------------
2651
2652 long wxRichTextCtrl::XYToPosition(long x, long y) const
2653 {
2654     return GetBuffer().XYToPosition(x, y);
2655 }
2656
2657 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2658 {
2659     return GetBuffer().PositionToXY(pos, x, y);
2660 }
2661
2662 // ----------------------------------------------------------------------------
2663 //
2664 // ----------------------------------------------------------------------------
2665
2666 void wxRichTextCtrl::ShowPosition(long pos)
2667 {
2668     if (!IsPositionVisible(pos))
2669         ScrollIntoView(pos-1, WXK_DOWN);
2670 }
2671
2672 int wxRichTextCtrl::GetLineLength(long lineNo) const
2673 {
2674     return GetBuffer().GetParagraphLength(lineNo);
2675 }
2676
2677 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2678 {
2679     return GetBuffer().GetParagraphText(lineNo);
2680 }
2681
2682 // ----------------------------------------------------------------------------
2683 // Undo/redo
2684 // ----------------------------------------------------------------------------
2685
2686 void wxRichTextCtrl::Undo()
2687 {
2688     if (CanUndo())
2689     {
2690         GetCommandProcessor()->Undo();
2691     }
2692 }
2693
2694 void wxRichTextCtrl::Redo()
2695 {
2696     if (CanRedo())
2697     {
2698         GetCommandProcessor()->Redo();
2699     }
2700 }
2701
2702 bool wxRichTextCtrl::CanUndo() const
2703 {
2704     return GetCommandProcessor()->CanUndo();
2705 }
2706
2707 bool wxRichTextCtrl::CanRedo() const
2708 {
2709     return GetCommandProcessor()->CanRedo();
2710 }
2711
2712 // ----------------------------------------------------------------------------
2713 // implementation details
2714 // ----------------------------------------------------------------------------
2715
2716 void wxRichTextCtrl::Command(wxCommandEvent& event)
2717 {
2718     SetValue(event.GetString());
2719     GetEventHandler()->ProcessEvent(event);
2720 }
2721
2722 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2723 {
2724     // By default, load the first file into the text window.
2725     if (event.GetNumberOfFiles() > 0)
2726     {
2727         LoadFile(event.GetFiles()[0]);
2728     }
2729 }
2730
2731 wxSize wxRichTextCtrl::DoGetBestSize() const
2732 {
2733     return wxSize(10, 10);
2734 }
2735
2736 // ----------------------------------------------------------------------------
2737 // standard handlers for standard edit menu events
2738 // ----------------------------------------------------------------------------
2739
2740 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2741 {
2742     Cut();
2743 }
2744
2745 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2746 {
2747     DeleteSelection();
2748 }
2749
2750 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2751 {
2752     Copy();
2753 }
2754
2755 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2756 {
2757     Paste();
2758 }
2759
2760 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2761 {
2762     Undo();
2763 }
2764
2765 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2766 {
2767     Redo();
2768 }
2769
2770 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2771 {
2772     event.Enable( CanCut() );
2773 }
2774
2775 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2776 {
2777     event.Enable( CanCopy() );
2778 }
2779
2780 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2781 {
2782     event.Enable( CanDeleteSelection() );
2783 }
2784
2785 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2786 {
2787     event.Enable( CanPaste() );
2788 }
2789
2790 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2791 {
2792     event.Enable( CanUndo() );
2793     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2794 }
2795
2796 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2797 {
2798     event.Enable( CanRedo() );
2799     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2800 }
2801
2802 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2803 {
2804     SelectAll();
2805 }
2806
2807 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2808 {
2809     event.Enable(GetLastPosition() > 0);
2810 }
2811
2812 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2813 {
2814     if (event.GetEventObject() != this)
2815     {
2816         event.Skip();
2817         return;
2818     }
2819
2820     if (!m_contextMenu)
2821     {
2822         m_contextMenu = new wxMenu;
2823         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2824         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2825         m_contextMenu->AppendSeparator();
2826         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2827         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2828         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2829         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2830         m_contextMenu->AppendSeparator();
2831         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2832     }
2833     PopupMenu(m_contextMenu);
2834     return;
2835 }
2836
2837 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2838 {
2839     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttr(style));
2840 }
2841
2842 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxTextAttr& style)
2843 {
2844     return GetBuffer().SetStyle(range.ToInternal(), style);
2845 }
2846
2847 // extended style setting operation with flags including:
2848 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2849 // see richtextbuffer.h for more details.
2850
2851 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttr& style, int flags)
2852 {
2853     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2854 }
2855
2856 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2857 {
2858     return GetBuffer().SetDefaultStyle(wxTextAttr(style));
2859 }
2860
2861 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2862 {
2863     return GetBuffer().GetDefaultStyle();
2864 }
2865
2866 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2867 {
2868     return GetBuffer().GetStyle(position, style);
2869 }
2870
2871 // get the common set of styles for the range
2872 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttr& style)
2873 {
2874     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2875 }
2876
2877 /// Get the content (uncombined) attributes for this position.
2878 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2879 {
2880     return GetBuffer().GetUncombinedStyle(position, style);
2881 }
2882
2883 /// Set font, and also the buffer attributes
2884 bool wxRichTextCtrl::SetFont(const wxFont& font)
2885 {
2886     wxTextCtrlBase::SetFont(font);
2887
2888     wxTextAttr attr = GetBuffer().GetAttributes();
2889     attr.SetFont(font);
2890     GetBuffer().SetBasicStyle(attr);
2891
2892     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2893     Refresh(false);
2894
2895     return true;
2896 }
2897
2898 /// Transform logical to physical
2899 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2900 {
2901     wxPoint pt;
2902     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2903
2904     return pt;
2905 }
2906
2907 /// Transform physical to logical
2908 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2909 {
2910     wxPoint pt;
2911     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2912
2913     return pt;
2914 }
2915
2916 /// Position the caret
2917 void wxRichTextCtrl::PositionCaret()
2918 {
2919     if (!GetCaret())
2920         return;
2921
2922     //wxLogDebug(wxT("PositionCaret"));
2923
2924     wxRect caretRect;
2925     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2926     {
2927         wxPoint newPt = caretRect.GetPosition();
2928         wxSize newSz = caretRect.GetSize();
2929         wxPoint pt = GetPhysicalPoint(newPt);
2930         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
2931         {
2932             GetCaret()->Hide();
2933             if (GetCaret()->GetSize() != newSz)
2934                 GetCaret()->SetSize(newSz);
2935
2936             int halfSize = newSz.y/2;
2937             // If the caret is beyond the margin, hide it by moving it out of the way
2938             if (((pt.y + halfSize) < GetBuffer().GetTopMargin()) || ((pt.y + halfSize) > (GetClientSize().y - GetBuffer().GetBottomMargin())))
2939                 pt.y = -200;
2940
2941             GetCaret()->Move(pt);
2942             GetCaret()->Show();
2943         }
2944     }
2945 }
2946
2947 /// Get the caret height and position for the given character position
2948 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2949 {
2950     wxClientDC dc(this);
2951     dc.SetFont(GetFont());
2952
2953     PrepareDC(dc);
2954
2955     wxPoint pt;
2956     int height = 0;
2957
2958     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2959     {
2960         // Caret height can't be zero
2961         if (height == 0)
2962             height = dc.GetCharHeight();
2963
2964         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2965         return true;
2966     }
2967
2968     return false;
2969 }
2970
2971 /// Gets the line for the visible caret position. If the caret is
2972 /// shown at the very end of the line, it means the next character is actually
2973 /// on the following line. So let's get the line we're expecting to find
2974 /// if this is the case.
2975 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2976 {
2977     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2978     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2979     if (line)
2980     {
2981         wxRichTextRange lineRange = line->GetAbsoluteRange();
2982         if (caretPosition == lineRange.GetStart()-1 &&
2983             (para->GetRange().GetStart() != lineRange.GetStart()))
2984         {
2985             if (!m_caretAtLineStart)
2986                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2987         }
2988     }
2989     return line;
2990 }
2991
2992
2993 /// Move the caret to the given character position
2994 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2995 {
2996     if (GetBuffer().GetDirty())
2997         LayoutContent();
2998
2999     if (pos <= GetBuffer().GetRange().GetEnd())
3000     {
3001         SetCaretPosition(pos, showAtLineStart);
3002
3003         PositionCaret();
3004
3005         return true;
3006     }
3007     else
3008         return false;
3009 }
3010
3011 /// Layout the buffer: which we must do before certain operations, such as
3012 /// setting the caret position.
3013 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
3014 {
3015     if (GetBuffer().GetDirty() || onlyVisibleRect)
3016     {
3017         wxRect availableSpace(GetClientSize());
3018         if (availableSpace.width == 0)
3019             availableSpace.width = 10;
3020         if (availableSpace.height == 0)
3021             availableSpace.height = 10;
3022
3023         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
3024         if (onlyVisibleRect)
3025         {
3026             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
3027             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
3028         }
3029
3030         wxClientDC dc(this);
3031         dc.SetFont(GetFont());
3032
3033         PrepareDC(dc);
3034
3035         GetBuffer().Defragment();
3036         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
3037         GetBuffer().Layout(dc, availableSpace, flags);
3038         GetBuffer().SetDirty(false);
3039
3040         if (!IsFrozen())
3041             SetupScrollbars();
3042     }
3043
3044     return true;
3045 }
3046
3047 /// Is all of the selection bold?
3048 bool wxRichTextCtrl::IsSelectionBold()
3049 {
3050     if (HasSelection())
3051     {
3052         wxTextAttr attr;
3053         wxRichTextRange range = GetSelectionRange();
3054         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3055         attr.SetFontWeight(wxFONTWEIGHT_BOLD);
3056
3057         return HasCharacterAttributes(range, attr);
3058     }
3059     else
3060     {
3061         // If no selection, then we need to combine current style with default style
3062         // to see what the effect would be if we started typing.
3063         wxTextAttr attr;
3064         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3065
3066         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3067         if (GetStyle(pos, attr))
3068         {
3069             if (IsDefaultStyleShowing())
3070                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3071             return attr.GetFontWeight() == wxFONTWEIGHT_BOLD;
3072         }
3073     }
3074     return false;
3075 }
3076
3077 /// Is all of the selection italics?
3078 bool wxRichTextCtrl::IsSelectionItalics()
3079 {
3080     if (HasSelection())
3081     {
3082         wxRichTextRange range = GetSelectionRange();
3083         wxTextAttr attr;
3084         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3085         attr.SetFontStyle(wxFONTSTYLE_ITALIC);
3086
3087         return HasCharacterAttributes(range, attr);
3088     }
3089     else
3090     {
3091         // If no selection, then we need to combine current style with default style
3092         // to see what the effect would be if we started typing.
3093         wxTextAttr attr;
3094         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3095
3096         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3097         if (GetStyle(pos, attr))
3098         {
3099             if (IsDefaultStyleShowing())
3100                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3101             return attr.GetFontStyle() == wxFONTSTYLE_ITALIC;
3102         }
3103     }
3104     return false;
3105 }
3106
3107 /// Is all of the selection underlined?
3108 bool wxRichTextCtrl::IsSelectionUnderlined()
3109 {
3110     if (HasSelection())
3111     {
3112         wxRichTextRange range = GetSelectionRange();
3113         wxTextAttr attr;
3114         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3115         attr.SetFontUnderlined(true);
3116
3117         return HasCharacterAttributes(range, attr);
3118     }
3119     else
3120     {
3121         // If no selection, then we need to combine current style with default style
3122         // to see what the effect would be if we started typing.
3123         wxTextAttr attr;
3124         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3125         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3126
3127         if (GetStyle(pos, attr))
3128         {
3129             if (IsDefaultStyleShowing())
3130                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3131             return attr.GetFontUnderlined();
3132         }
3133     }
3134     return false;
3135 }
3136
3137 /// Apply bold to the selection
3138 bool wxRichTextCtrl::ApplyBoldToSelection()
3139 {
3140     wxTextAttr attr;
3141     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3142     attr.SetFontWeight(IsSelectionBold() ? wxFONTWEIGHT_NORMAL : wxFONTWEIGHT_BOLD);
3143
3144     if (HasSelection())
3145         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3146     else
3147     {
3148         wxRichTextAttr current = GetDefaultStyleEx();
3149         current.Apply(attr);
3150         SetAndShowDefaultStyle(current);
3151     }
3152     return true;
3153 }
3154
3155 /// Apply italic to the selection
3156 bool wxRichTextCtrl::ApplyItalicToSelection()
3157 {
3158     wxTextAttr attr;
3159     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3160     attr.SetFontStyle(IsSelectionItalics() ? wxFONTSTYLE_NORMAL : wxFONTSTYLE_ITALIC);
3161
3162     if (HasSelection())
3163         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3164     else
3165     {
3166         wxRichTextAttr current = GetDefaultStyleEx();
3167         current.Apply(attr);
3168         SetAndShowDefaultStyle(current);
3169     }
3170     return true;
3171 }
3172
3173 /// Apply underline to the selection
3174 bool wxRichTextCtrl::ApplyUnderlineToSelection()
3175 {
3176     wxTextAttr attr;
3177     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3178     attr.SetFontUnderlined(!IsSelectionUnderlined());
3179
3180     if (HasSelection())
3181         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3182     else
3183     {
3184         wxRichTextAttr current = GetDefaultStyleEx();
3185         current.Apply(attr);
3186         SetAndShowDefaultStyle(current);
3187     }
3188     return true;
3189 }
3190
3191 /// Is all of the selection aligned according to the specified flag?
3192 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
3193 {
3194     wxRichTextRange range;
3195     if (HasSelection())
3196         range = GetSelectionRange();
3197     else
3198         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
3199
3200     wxTextAttr attr;
3201     attr.SetAlignment(alignment);
3202
3203     return HasParagraphAttributes(range, attr);
3204 }
3205
3206 /// Apply alignment to the selection
3207 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
3208 {
3209     wxTextAttr attr;
3210     attr.SetAlignment(alignment);
3211     if (HasSelection())
3212         return SetStyle(GetSelectionRange(), attr);
3213     else
3214     {
3215         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
3216         if (para)
3217             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
3218     }
3219     return true;
3220 }
3221
3222 /// Apply a named style to the selection
3223 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
3224 {
3225     // Flags are defined within each definition, so only certain
3226     // attributes are applied.
3227     wxTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
3228
3229     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_RESET;
3230
3231     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
3232     {
3233         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3234
3235         wxRichTextRange range;
3236
3237         if (HasSelection())
3238             range = GetSelectionRange();
3239         else
3240         {
3241             long pos = GetAdjustedCaretPosition(GetCaretPosition());
3242             range = wxRichTextRange(pos, pos+1);
3243         }
3244
3245         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
3246     }
3247
3248     // Make sure the attr has the style name
3249     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
3250     {
3251         attr.SetParagraphStyleName(def->GetName());
3252
3253         // If applying a paragraph style, we only want the paragraph nodes to adopt these
3254         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
3255         // to change its style independently.
3256         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3257     }
3258     else
3259         attr.SetCharacterStyleName(def->GetName());
3260
3261     if (HasSelection())
3262         return SetStyleEx(GetSelectionRange(), attr, flags);
3263     else
3264     {
3265         wxRichTextAttr current = GetDefaultStyleEx();
3266         current.Apply(attr);
3267         SetAndShowDefaultStyle(current);
3268         return true;
3269     }
3270 }
3271
3272 /// Apply the style sheet to the buffer, for example if the styles have changed.
3273 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
3274 {
3275     if (!styleSheet)
3276         styleSheet = GetBuffer().GetStyleSheet();
3277     if (!styleSheet)
3278         return false;
3279
3280     if (GetBuffer().ApplyStyleSheet(styleSheet))
3281     {
3282         GetBuffer().Invalidate(wxRICHTEXT_ALL);
3283         Refresh(false);
3284         return true;
3285     }
3286     else
3287         return false;
3288 }
3289
3290 /// Sets the default style to the style under the cursor
3291 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3292 {
3293     wxTextAttr attr;
3294     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3295
3296     // If at the start of a paragraph, use the next position.
3297     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3298
3299     if (GetUncombinedStyle(pos, attr))
3300     {
3301         SetDefaultStyle(attr);
3302         return true;
3303     }
3304
3305     return false;
3306 }
3307
3308 /// Returns the first visible position in the current view
3309 long wxRichTextCtrl::GetFirstVisiblePosition() const
3310 {
3311     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3312     if (line)
3313         return line->GetAbsoluteRange().GetStart();
3314     else
3315         return 0;
3316 }
3317
3318 /// Get the first visible point in the window
3319 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3320 {
3321     int ppuX, ppuY;
3322     int startXUnits, startYUnits;
3323
3324     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3325     GetViewStart(& startXUnits, & startYUnits);
3326
3327     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3328 }
3329
3330 /// The adjusted caret position is the character position adjusted to take
3331 /// into account whether we're at the start of a paragraph, in which case
3332 /// style information should be taken from the next position, not current one.
3333 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3334 {
3335     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3336
3337     if (para && (caretPos+1 == para->GetRange().GetStart()))
3338         caretPos ++;
3339     return caretPos;
3340 }
3341
3342 /// Get/set the selection range in character positions. -1, -1 means no selection.
3343 /// The range is in API convention, i.e. a single character selection is denoted
3344 /// by (n, n+1)
3345 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3346 {
3347     wxRichTextRange range = GetInternalSelectionRange();
3348     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3349         range.SetEnd(range.GetEnd() + 1);
3350     return range;
3351 }
3352
3353 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3354 {
3355     wxRichTextRange range1(range);
3356     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3357         range1.SetEnd(range1.GetEnd() - 1);
3358
3359     wxASSERT( range1.GetStart() > range1.GetEnd() );
3360
3361     SetInternalSelectionRange(range1);
3362 }
3363
3364 /// Set list style
3365 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3366 {
3367     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3368 }
3369
3370 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3371 {
3372     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3373 }
3374
3375 /// Clear list for given range
3376 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3377 {
3378     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3379 }
3380
3381 /// Number/renumber any list elements in the given range
3382 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3383 {
3384     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3385 }
3386
3387 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3388 {
3389     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3390 }
3391
3392 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3393 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3394 {
3395     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3396 }
3397
3398 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3399 {
3400     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3401 }
3402
3403 /// Deletes the content in the given range
3404 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3405 {
3406     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3407 }
3408
3409 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3410 {
3411     if (sm_availableFontNames.GetCount() == 0)
3412     {
3413         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3414         sm_availableFontNames.Sort();
3415     }
3416     return sm_availableFontNames;
3417 }
3418
3419 void wxRichTextCtrl::ClearAvailableFontNames()
3420 {
3421     sm_availableFontNames.Clear();
3422 }
3423
3424 void wxRichTextCtrl::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
3425 {
3426     //wxLogDebug(wxT("wxRichTextCtrl::OnSysColourChanged"));
3427
3428     wxTextAttrEx basicStyle = GetBasicStyle();
3429     basicStyle.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
3430     SetBasicStyle(basicStyle);
3431     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
3432
3433     Refresh();
3434 }
3435
3436 // Refresh the area affected by a selection change
3437 bool wxRichTextCtrl::RefreshForSelectionChange(const wxRichTextRange& oldSelection, const wxRichTextRange& newSelection)
3438 {
3439     // Calculate the refresh rectangle - just the affected lines
3440     long firstPos, lastPos;
3441     if (oldSelection.GetStart() == -2 && newSelection.GetStart() != -2)
3442     {
3443         firstPos = newSelection.GetStart();
3444         lastPos = newSelection.GetEnd();
3445     }
3446     else if (oldSelection.GetStart() != -2 && newSelection.GetStart() == -2)
3447     {
3448         firstPos = oldSelection.GetStart();
3449         lastPos = oldSelection.GetEnd();
3450     }
3451     else if (oldSelection.GetStart() == -2 && newSelection.GetStart() == -2)
3452     {
3453         return false;
3454     }
3455     else
3456     {
3457         firstPos = wxMin(oldSelection.GetStart(), newSelection.GetStart());
3458         lastPos = wxMax(oldSelection.GetEnd(), newSelection.GetEnd());
3459     }
3460
3461     wxRichTextLine* firstLine = GetBuffer().GetLineAtPosition(firstPos);
3462     wxRichTextLine* lastLine = GetBuffer().GetLineAtPosition(lastPos);
3463
3464     if (firstLine && lastLine)
3465     {
3466         wxSize clientSize = GetClientSize();
3467         wxPoint pt1 = GetPhysicalPoint(firstLine->GetAbsolutePosition());
3468         wxPoint pt2 = GetPhysicalPoint(lastLine->GetAbsolutePosition()) + wxPoint(0, lastLine->GetSize().y);
3469
3470         pt1.x = 0;
3471         pt1.y = wxMax(0, pt1.y);
3472         pt2.x = 0;
3473         pt2.y = wxMin(clientSize.y, pt2.y);
3474
3475         wxRect rect(pt1, wxSize(clientSize.x, pt2.y - pt1.y));
3476         RefreshRect(rect, false);
3477     }
3478     else
3479         Refresh(false);
3480
3481     return true;
3482 }
3483
3484 #if wxRICHTEXT_USE_OWN_CARET
3485
3486 // ----------------------------------------------------------------------------
3487 // initialization and destruction
3488 // ----------------------------------------------------------------------------
3489
3490 void wxRichTextCaret::Init()
3491 {
3492     m_hasFocus = true;
3493
3494     m_xOld =
3495     m_yOld = -1;
3496     m_richTextCtrl = NULL;
3497     m_needsUpdate = false;
3498     m_flashOn = true;
3499 }
3500
3501 wxRichTextCaret::~wxRichTextCaret()
3502 {
3503     if (m_timer.IsRunning())
3504         m_timer.Stop();
3505 }
3506
3507 // ----------------------------------------------------------------------------
3508 // showing/hiding/moving the caret (base class interface)
3509 // ----------------------------------------------------------------------------
3510
3511 void wxRichTextCaret::DoShow()
3512 {
3513     m_flashOn = true;
3514
3515     if (!m_timer.IsRunning())
3516         m_timer.Start(GetBlinkTime());
3517
3518     Refresh();
3519 }
3520
3521 void wxRichTextCaret::DoHide()
3522 {
3523     if (m_timer.IsRunning())
3524         m_timer.Stop();
3525
3526     Refresh();
3527 }
3528
3529 void wxRichTextCaret::DoMove()
3530 {
3531     if (IsVisible())
3532     {
3533         Refresh();
3534
3535         if (m_xOld != -1 && m_yOld != -1)
3536         {
3537             if (m_richTextCtrl)
3538             {
3539                 wxRect rect(GetPosition(), GetSize());
3540                 m_richTextCtrl->RefreshRect(rect, false);
3541             }
3542         }
3543     }
3544
3545     m_xOld = m_x;
3546     m_yOld = m_y;
3547 }
3548
3549 void wxRichTextCaret::DoSize()
3550 {
3551     int countVisible = m_countVisible;
3552     if (countVisible > 0)
3553     {
3554         m_countVisible = 0;
3555         DoHide();
3556     }
3557
3558     if (countVisible > 0)
3559     {
3560         m_countVisible = countVisible;
3561         DoShow();
3562     }
3563 }
3564
3565 // ----------------------------------------------------------------------------
3566 // handling the focus
3567 // ----------------------------------------------------------------------------
3568
3569 void wxRichTextCaret::OnSetFocus()
3570 {
3571     m_hasFocus = true;
3572
3573     if ( IsVisible() )
3574         Refresh();
3575 }
3576
3577 void wxRichTextCaret::OnKillFocus()
3578 {
3579     m_hasFocus = false;
3580 }
3581
3582 // ----------------------------------------------------------------------------
3583 // drawing the caret
3584 // ----------------------------------------------------------------------------
3585
3586 void wxRichTextCaret::Refresh()
3587 {
3588     if (m_richTextCtrl)
3589     {
3590         wxRect rect(GetPosition(), GetSize());
3591         m_richTextCtrl->RefreshRect(rect, false);
3592     }
3593 }
3594
3595 void wxRichTextCaret::DoDraw(wxDC *dc)
3596 {
3597     dc->SetPen( *wxBLACK_PEN );
3598
3599     dc->SetBrush(*(m_hasFocus ? wxBLACK_BRUSH : wxTRANSPARENT_BRUSH));
3600     dc->SetPen(*wxBLACK_PEN);
3601
3602     wxPoint pt(m_x, m_y);
3603
3604     if (m_richTextCtrl)
3605     {
3606         pt = m_richTextCtrl->GetLogicalPoint(pt);
3607     }
3608     if (IsVisible() && m_flashOn)
3609         dc->DrawRectangle(pt.x, pt.y, m_width, m_height);
3610 }
3611
3612 void wxRichTextCaret::Notify()
3613 {
3614     m_flashOn = !m_flashOn;
3615     Refresh();
3616 }
3617
3618 void wxRichTextCaretTimer::Notify()
3619 {
3620     m_caret->Notify();
3621 }
3622 #endif
3623     // wxRICHTEXT_USE_OWN_CARET
3624
3625 #endif
3626     // wxUSE_RICHTEXT