src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richeditctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/textfile.h"
  30 #include "wx/ffile.h"
  31 #include "wx/filename.h"
  32 #include "wx/dcbuffer.h"
  33 #include "wx/arrimpl.cpp"
  34 #include "wx/fontenum.h"
  35
  36 // DLL options compatibility check:
  37 #include "wx/app.h"
  38 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  39
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_ITEM_SELECTED)
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_ITEM_DESELECTED)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_CLICK)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK)
  45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK)
  46 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RETURN)
  47 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING)
  48 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED)
  49 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING)
  50 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED)
  51
  52 IMPLEMENT_CLASS( wxRichTextCtrl, wxControl )
  53
  54 IMPLEMENT_CLASS( wxRichTextEvent, wxNotifyEvent )
  55
  56 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
  57     EVT_PAINT(wxRichTextCtrl::OnPaint)
  58     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
  59     EVT_IDLE(wxRichTextCtrl::OnIdle)
  60     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
  61     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
  62     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
  63     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
  64     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
  65     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
  66     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
  67     EVT_CHAR(wxRichTextCtrl::OnChar)
  68     EVT_SIZE(wxRichTextCtrl::OnSize)
  69     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
  70     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
  71     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
  72
  73     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
  74     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
  75
  76     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
  77     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
  78
  79     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
  80     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
  81
  82     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
  83     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
  84
  85     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
  86     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
  87
  88     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
  89     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
  90
  91     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
  92     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
  93 END_EVENT_TABLE()
  94
  95 /*!
  96  * wxRichTextCtrl
  97  */
  98
  99 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 100
 101 wxRichTextCtrl::wxRichTextCtrl()
 102               : wxScrollHelper(this)
 103 {
 104     Init();
 105 }
 106
 107 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 108                                wxWindowID id,
 109                                const wxString& value,
 110                                const wxPoint& pos,
 111                                const wxSize& size,
 112                                long style)
 113               : wxScrollHelper(this)
 114 {
 115     Init();
 116     Create(parent, id, value, pos, size, style);
 117 }
 118
 119 /// Creation
 120 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style)
 121 {
 122     if (!wxTextCtrlBase::Create(parent, id, pos, size,
 123                                 style|wxFULL_REPAINT_ON_RESIZE))
 124         return false;
 125
 126     if (!GetFont().Ok())
 127     {
 128         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 129     }
 130
 131     GetBuffer().Reset();
 132     GetBuffer().SetRichTextCtrl(this);
 133
 134     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 135     GetCaret()->Show();
 136
 137     if (style & wxTE_READONLY)
 138         SetEditable(false);
 139
 140     wxTextAttrEx attributes;
 141     attributes.SetFont(GetFont());
 142     attributes.SetTextColour(*wxBLACK);
 143     attributes.SetBackgroundColour(*wxWHITE);
 144     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 145     attributes.SetLineSpacing(10);
 146     attributes.SetParagraphSpacingAfter(10);
 147     attributes.SetParagraphSpacingBefore(0);
 148
 149     SetBasicStyle(attributes);
 150
 151     // The default attributes will be merged with base attributes, so
 152     // can be empty to begin with
 153     wxTextAttrEx defaultAttributes;
 154     SetDefaultStyle(defaultAttributes);
 155
 156     SetBackgroundColour(*wxWHITE);
 157     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 158
 159     // Tell the sizers to use the given or best size
 160     SetBestFittingSize(size);
 161
 162 #if wxRICHTEXT_BUFFERED_PAINTING
 163     // Create a buffer
 164     RecreateBuffer(size);
 165 #endif
 166
 167     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 168     m_urlCursor = wxCursor(wxCURSOR_HAND);
 169
 170     SetCursor(m_textCursor);
 171
 172     if (!value.IsEmpty())
 173         SetValue(value);
 174
 175     GetBuffer().AddEventHandler(this);
 176
 177     return true;
 178 }
 179
 180 wxRichTextCtrl::~wxRichTextCtrl()
 181 {
 182     GetBuffer().RemoveEventHandler(this);
 183
 184     delete m_contextMenu;
 185 }
 186
 187 /// Member initialisation
 188 void wxRichTextCtrl::Init()
 189 {
 190     m_freezeCount = 0;
 191     m_contextMenu = NULL;
 192     m_caret = NULL;
 193     m_caretPosition = -1;
 194     m_selectionRange.SetRange(-2, -2);
 195     m_selectionAnchor = -2;
 196     m_editable = true;
 197     m_caretAtLineStart = false;
 198     m_dragging = false;
 199     m_fullLayoutRequired = false;
 200     m_fullLayoutTime = 0;
 201     m_fullLayoutSavedPosition = 0;
 202     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 203     m_caretPositionForDefaultStyle = -2;
 204 }
 205
 206 /// Call Freeze to prevent refresh
 207 void wxRichTextCtrl::Freeze()
 208 {
 209     m_freezeCount ++;
 210 }
 211
 212 /// Call Thaw to refresh
 213 void wxRichTextCtrl::Thaw()
 214 {
 215     m_freezeCount --;
 216
 217     if (m_freezeCount == 0)
 218     {
 219         SetupScrollbars();
 220         Refresh(false);
 221     }
 222 }
 223
 224 /// Clear all text
 225 void wxRichTextCtrl::Clear()
 226 {
 227     m_buffer.ResetAndClearCommands();
 228     m_buffer.SetDirty(true);
 229     m_caretPosition = -1;
 230     m_caretPositionForDefaultStyle = -2;
 231     m_caretAtLineStart = false;
 232     m_selectionRange.SetRange(-2, -2);
 233
 234     SetScrollbars(0, 0, 0, 0, 0, 0);
 235
 236     if (m_freezeCount == 0)
 237     {
 238         SetupScrollbars();
 239         Refresh(false);
 240     }
 241     SendTextUpdatedEvent();
 242 }
 243
 244 /// Painting
 245 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 246 {
 247     if (GetCaret() && GetCaret()->IsVisible())
 248         GetCaret()->Hide();
 249
 250     {
 251 #if wxRICHTEXT_BUFFERED_PAINTING
 252         wxBufferedPaintDC dc(this, m_bufferBitmap);
 253 #else
 254         wxPaintDC dc(this);
 255 #endif
 256         PrepareDC(dc);
 257
 258         if (m_freezeCount > 0)
 259             return;
 260
 261         dc.SetFont(GetFont());
 262
 263         // Paint the background
 264         PaintBackground(dc);
 265
 266         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 267
 268         wxRect drawingArea(GetUpdateRegion().GetBox());
 269         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 270
 271         wxRect availableSpace(GetClientSize());
 272         if (GetBuffer().GetDirty())
 273         {
 274             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 275             GetBuffer().SetDirty(false);
 276             SetupScrollbars();
 277         }
 278
 279         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 280     }
 281
 282     if (GetCaret() && !GetCaret()->IsVisible())
 283         GetCaret()->Show();
 284
 285     PositionCaret();
 286 }
 287
 288 // Empty implementation, to prevent flicker
 289 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 290 {
 291 }
 292
 293 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 294 {
 295     if (GetCaret())
 296     {
 297         if (!GetCaret()->IsVisible())
 298             GetCaret()->Show();
 299         PositionCaret();
 300     }
 301
 302     // if (!IsFrozen())
 303     //    Refresh(false);
 304 }
 305
 306 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 307 {
 308     if (GetCaret() && GetCaret()->IsVisible())
 309         GetCaret()->Hide();
 310
 311     // if (!IsFrozen())
 312     //    Refresh(false);
 313 }
 314
 315 /// Left-click
 316 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 317 {
 318     SetFocus();
 319
 320     wxClientDC dc(this);
 321     PrepareDC(dc);
 322     dc.SetFont(GetFont());
 323
 324     long position = 0;
 325     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 326
 327     if (hit != wxRICHTEXT_HITTEST_NONE)
 328     {
 329         m_dragStart = event.GetLogicalPosition(dc);
 330         m_dragging = true;
 331         CaptureMouse();
 332
 333         SelectNone();
 334
 335         bool caretAtLineStart = false;
 336
 337         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 338         {
 339             // If we're at the start of a line (but not first in para)
 340             // then we should keep the caret showing at the start of the line
 341             // by showing the m_caretAtLineStart flag.
 342             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 343             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 344
 345             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 346                 caretAtLineStart = true;
 347             position --;
 348         }
 349
 350         MoveCaret(position, caretAtLineStart);
 351         SetDefaultStyleToCursorStyle();
 352     }
 353
 354     event.Skip();
 355 }
 356
 357 /// Left-up
 358 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 359 {
 360     if (m_dragging)
 361     {
 362         m_dragging = false;
 363         if (GetCapture() == this)
 364             ReleaseMouse();
 365
 366         // See if we clicked on a URL
 367         wxClientDC dc(this);
 368         PrepareDC(dc);
 369         dc.SetFont(GetFont());
 370
 371         long position = 0;
 372         wxPoint logicalPt = event.GetLogicalPosition(dc);
 373         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 374
 375         if (hit != wxRICHTEXT_HITTEST_NONE)
 376         {
 377             wxTextAttrEx attr;
 378             if (GetStyle(position, attr))
 379             {
 380                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 381                 {
 382                     wxString urlTarget = attr.GetURL();
 383                     if (!urlTarget.IsEmpty())
 384                     {
 385                         wxMouseEvent mouseEvent(event);
 386
 387                         long startPos = 0, endPos = 0;
 388                         wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 389                         if (obj)
 390                         {
 391                             startPos = obj->GetRange().GetStart();
 392                             endPos = obj->GetRange().GetEnd();
 393                         }
 394
 395                         wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 396                         InitCommandEvent(urlEvent);
 397
 398                         urlEvent.SetString(urlTarget);
 399
 400                         GetEventHandler()->ProcessEvent(urlEvent);
 401                     }
 402                 }
 403             }
 404         }
 405     }
 406 }
 407
 408 /// Left-click
 409 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 410 {
 411     wxClientDC dc(this);
 412     PrepareDC(dc);
 413     dc.SetFont(GetFont());
 414
 415     long position = 0;
 416     wxPoint logicalPt = event.GetLogicalPosition(dc);
 417     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 418
 419     // See if we need to change the cursor
 420
 421     {
 422         if (hit != wxRICHTEXT_HITTEST_NONE)
 423         {
 424             wxTextAttrEx attr;
 425             if (GetStyle(position, attr))
 426             {
 427                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 428                 {
 429                     if (!GetCursor().IsRefTo(&m_urlCursor))
 430                         SetCursor(m_urlCursor);
 431                 }
 432                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 433                 {
 434                     if (!GetCursor().IsRefTo(&m_textCursor))
 435                         SetCursor(m_textCursor);
 436                 }
 437             }
 438         }
 439     }
 440
 441     if (!event.Dragging())
 442     {
 443         event.Skip();
 444         return;
 445     }
 446
 447     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 448     {
 449         // TODO: test closeness
 450
 451         bool caretAtLineStart = false;
 452
 453         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 454         {
 455             // If we're at the start of a line (but not first in para)
 456             // then we should keep the caret showing at the start of the line
 457             // by showing the m_caretAtLineStart flag.
 458             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 459             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 460
 461             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 462                 caretAtLineStart = true;
 463             position --;
 464         }
 465
 466         if (m_caretPosition != position)
 467         {
 468             bool extendSel = ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 469
 470             MoveCaret(position, caretAtLineStart);
 471             SetDefaultStyleToCursorStyle();
 472
 473             if (extendSel)
 474                 Refresh(false);
 475         }
 476     }
 477 }
 478
 479 /// Right-click
 480 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 481 {
 482     SetFocus();
 483     event.Skip();
 484 }
 485
 486 /// Left-double-click
 487 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& event)
 488 {
 489     SelectWord(GetCaretPosition()+1);
 490     event.Skip();
 491 }
 492
 493 /// Middle-click
 494 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 495 {
 496     event.Skip();
 497 }
 498
 499 /// Key press
 500 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 501 {
 502     int flags = 0;
 503     if (event.CmdDown())
 504         flags |= wxRICHTEXT_CTRL_DOWN;
 505     if (event.ShiftDown())
 506         flags |= wxRICHTEXT_SHIFT_DOWN;
 507     if (event.AltDown())
 508         flags |= wxRICHTEXT_ALT_DOWN;
 509
 510     if (event.GetKeyCode() == WXK_LEFT ||
 511         event.GetKeyCode() == WXK_RIGHT ||
 512         event.GetKeyCode() == WXK_UP ||
 513         event.GetKeyCode() == WXK_DOWN ||
 514         event.GetKeyCode() == WXK_HOME ||
 515         event.GetKeyCode() == WXK_PAGEUP ||
 516         event.GetKeyCode() == WXK_PAGEDOWN ||
 517         event.GetKeyCode() == WXK_END ||
 518
 519         event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 520         event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 521         event.GetKeyCode() == WXK_NUMPAD_UP ||
 522         event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 523         event.GetKeyCode() == WXK_NUMPAD_HOME ||
 524         event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 525         event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 526         event.GetKeyCode() == WXK_NUMPAD_END)
 527     {
 528         KeyboardNavigate(event.GetKeyCode(), flags);
 529         return;
 530     }
 531
 532     // all the other keys modify the controls contents which shouldn't be
 533     // possible if we're read-only
 534     if ( !IsEditable() )
 535     {
 536         event.Skip();
 537         return;
 538     }
 539
 540     if (event.GetKeyCode() == WXK_RETURN)
 541     {
 542         BeginBatchUndo(_("Insert Text"));
 543
 544         long newPos = m_caretPosition;
 545
 546         DeleteSelectedContent(& newPos);
 547
 548         GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
 549         EndBatchUndo();
 550         SetDefaultStyleToCursorStyle();
 551
 552         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 553
 554         wxRichTextEvent cmdEvent(
 555             wxEVT_COMMAND_RICHTEXT_RETURN,
 556             GetId());
 557         cmdEvent.SetEventObject(this);
 558         cmdEvent.SetFlags(flags);
 559         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 560         {
 561             // Generate conventional event
 562             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 563             InitCommandEvent(textEvent);
 564
 565             GetEventHandler()->ProcessEvent(textEvent);
 566         }
 567         Update();
 568     }
 569     else if (event.GetKeyCode() == WXK_BACK)
 570     {
 571         BeginBatchUndo(_("Delete Text"));
 572
 573         // Submit range in character positions, which are greater than caret positions,
 574         // so subtract 1 for deleted character and add 1 for conversion to character position.
 575         if (m_caretPosition > -1 && !HasSelection())
 576         {
 577             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition, m_caretPosition),
 578                 m_caretPosition,   // Current caret position
 579                 m_caretPosition-1, // New caret position
 580                 this);
 581         }
 582         else
 583             DeleteSelectedContent();
 584
 585         EndBatchUndo();
 586
 587         if (GetLastPosition() == -1)
 588         {
 589             GetBuffer().Reset();
 590
 591             m_caretPosition = -1;
 592             PositionCaret();
 593             SetDefaultStyleToCursorStyle();
 594         }
 595
 596         ScrollIntoView(m_caretPosition, WXK_LEFT);
 597         Update();
 598     }
 599     else if (event.GetKeyCode() == WXK_DELETE)
 600     {
 601         BeginBatchUndo(_("Delete Text"));
 602
 603         // Submit range in character positions, which are greater than caret positions,
 604         if (m_caretPosition < GetBuffer().GetRange().GetEnd()+1 && !HasSelection())
 605         {
 606             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition+1, m_caretPosition+1),
 607                 m_caretPosition,   // Current caret position
 608                 m_caretPosition+1, // New caret position
 609                 this);
 610         }
 611         else
 612             DeleteSelectedContent();
 613
 614         EndBatchUndo();
 615
 616         if (GetLastPosition() == -1)
 617         {
 618             GetBuffer().Reset();
 619
 620             m_caretPosition = -1;
 621             PositionCaret();
 622             SetDefaultStyleToCursorStyle();
 623         }
 624         Update();
 625     }
 626     else
 627     {
 628         long keycode = event.GetKeyCode();
 629         switch ( keycode )
 630         {
 631             case WXK_ESCAPE:
 632             // case WXK_SPACE:
 633             case WXK_DELETE:
 634             case WXK_START:
 635             case WXK_LBUTTON:
 636             case WXK_RBUTTON:
 637             case WXK_CANCEL:
 638             case WXK_MBUTTON:
 639             case WXK_CLEAR:
 640             case WXK_SHIFT:
 641             case WXK_ALT:
 642             case WXK_CONTROL:
 643             case WXK_MENU:
 644             case WXK_PAUSE:
 645             case WXK_CAPITAL:
 646             case WXK_END:
 647             case WXK_HOME:
 648             case WXK_LEFT:
 649             case WXK_UP:
 650             case WXK_RIGHT:
 651             case WXK_DOWN:
 652             case WXK_SELECT:
 653             case WXK_PRINT:
 654             case WXK_EXECUTE:
 655             case WXK_SNAPSHOT:
 656             case WXK_INSERT:
 657             case WXK_HELP:
 658             case WXK_NUMPAD0:
 659             case WXK_NUMPAD1:
 660             case WXK_NUMPAD2:
 661             case WXK_NUMPAD3:
 662             case WXK_NUMPAD4:
 663             case WXK_NUMPAD5:
 664             case WXK_NUMPAD6:
 665             case WXK_NUMPAD7:
 666             case WXK_NUMPAD8:
 667             case WXK_NUMPAD9:
 668             case WXK_MULTIPLY:
 669             case WXK_ADD:
 670             case WXK_SEPARATOR:
 671             case WXK_SUBTRACT:
 672             case WXK_DECIMAL:
 673             case WXK_DIVIDE:
 674             case WXK_F1:
 675             case WXK_F2:
 676             case WXK_F3:
 677             case WXK_F4:
 678             case WXK_F5:
 679             case WXK_F6:
 680             case WXK_F7:
 681             case WXK_F8:
 682             case WXK_F9:
 683             case WXK_F10:
 684             case WXK_F11:
 685             case WXK_F12:
 686             case WXK_F13:
 687             case WXK_F14:
 688             case WXK_F15:
 689             case WXK_F16:
 690             case WXK_F17:
 691             case WXK_F18:
 692             case WXK_F19:
 693             case WXK_F20:
 694             case WXK_F21:
 695             case WXK_F22:
 696             case WXK_F23:
 697             case WXK_F24:
 698             case WXK_NUMLOCK:
 699             case WXK_SCROLL:
 700             case WXK_PAGEUP:
 701             case WXK_PAGEDOWN:
 702             case WXK_NUMPAD_SPACE:
 703             case WXK_NUMPAD_TAB:
 704             case WXK_NUMPAD_ENTER:
 705             case WXK_NUMPAD_F1:
 706             case WXK_NUMPAD_F2:
 707             case WXK_NUMPAD_F3:
 708             case WXK_NUMPAD_F4:
 709             case WXK_NUMPAD_HOME:
 710             case WXK_NUMPAD_LEFT:
 711             case WXK_NUMPAD_UP:
 712             case WXK_NUMPAD_RIGHT:
 713             case WXK_NUMPAD_DOWN:
 714             case WXK_NUMPAD_PAGEUP:
 715             case WXK_NUMPAD_PAGEDOWN:
 716             case WXK_NUMPAD_END:
 717             case WXK_NUMPAD_BEGIN:
 718             case WXK_NUMPAD_INSERT:
 719             case WXK_NUMPAD_DELETE:
 720             case WXK_NUMPAD_EQUAL:
 721             case WXK_NUMPAD_MULTIPLY:
 722             case WXK_NUMPAD_ADD:
 723             case WXK_NUMPAD_SEPARATOR:
 724             case WXK_NUMPAD_SUBTRACT:
 725             case WXK_NUMPAD_DECIMAL:
 726             {
 727                 event.Skip();
 728                 return;
 729             }
 730
 731             default:
 732             {
 733                 if (event.CmdDown() || event.AltDown())
 734                 {
 735                     event.Skip();
 736                     return;
 737                 }
 738
 739                 if (keycode == wxT('\t'))
 740                 {
 741                     // See if we need to promote or demote the selection or paragraph at the cursor
 742                     // position, instead of inserting a tab.
 743                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
 744                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
 745                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
 746                     {
 747                         wxRichTextRange range;
 748                         if (HasSelection())
 749                             range = GetSelectionRange();
 750                         else
 751                             range = para->GetRange().FromInternal();
 752
 753                         int promoteBy = event.ShiftDown() ? 1 : -1;
 754
 755                         PromoteList(promoteBy, range, NULL);
 756
 757                         return;
 758                     }
 759                 }
 760
 761                 BeginBatchUndo(_("Insert Text"));
 762
 763                 long newPos = m_caretPosition;
 764                 DeleteSelectedContent(& newPos);
 765
 766                 wxString str = (wxChar) event.GetKeyCode();
 767                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
 768
 769                 EndBatchUndo();
 770
 771                 SetDefaultStyleToCursorStyle();
 772                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
 773                 Update();
 774             }
 775         }
 776     }
 777 }
 778
 779 /// Delete content if there is a selection, e.g. when pressing a key.
 780 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
 781 {
 782     if (HasSelection())
 783     {
 784         long pos = m_selectionRange.GetStart();
 785         GetBuffer().DeleteRangeWithUndo(m_selectionRange,
 786             m_caretPosition,       // Current caret position
 787             pos,    // New caret position
 788             this);
 789         m_selectionRange.SetRange(-2, -2);
 790
 791         if (newPos)
 792             *newPos = pos-1;
 793         return true;
 794     }
 795     else
 796         return false;
 797 }
 798
 799 /// Keyboard navigation
 800
 801 /*
 802
 803 Left:       left one character
 804 Right:      right one character
 805 Up:         up one line
 806 Down:       down one line
 807 Ctrl-Left:  left one word
 808 Ctrl-Right: right one word
 809 Ctrl-Up:    previous paragraph start
 810 Ctrl-Down:  next start of paragraph
 811 Home:       start of line
 812 End:        end of line
 813 Ctrl-Home:  start of document
 814 Ctrl-End:   end of document
 815 Page-Up:    Up a screen
 816 Page-Down:  Down a screen
 817
 818 Maybe:
 819
 820 Ctrl-Alt-PgUp: Start of window
 821 Ctrl-Alt-PgDn: End of window
 822 F8:         Start selection mode
 823 Esc:        End selection mode
 824
 825 Adding Shift does the above but starts/extends selection.
 826
 827
 828  */
 829
 830 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
 831 {
 832     bool success = false;
 833
 834     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
 835     {
 836         if (flags & wxRICHTEXT_CTRL_DOWN)
 837             success = WordRight(1, flags);
 838         else
 839             success = MoveRight(1, flags);
 840     }
 841     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
 842     {
 843         if (flags & wxRICHTEXT_CTRL_DOWN)
 844             success = WordLeft(1, flags);
 845         else
 846             success = MoveLeft(1, flags);
 847     }
 848     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
 849     {
 850         if (flags & wxRICHTEXT_CTRL_DOWN)
 851             success = MoveToParagraphStart(flags);
 852         else
 853             success = MoveUp(1, flags);
 854     }
 855     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
 856     {
 857         if (flags & wxRICHTEXT_CTRL_DOWN)
 858             success = MoveToParagraphEnd(flags);
 859         else
 860             success = MoveDown(1, flags);
 861     }
 862     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
 863     {
 864         success = PageUp(1, flags);
 865     }
 866     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
 867     {
 868         success = PageDown(1, flags);
 869     }
 870     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
 871     {
 872         if (flags & wxRICHTEXT_CTRL_DOWN)
 873             success = MoveHome(flags);
 874         else
 875             success = MoveToLineStart(flags);
 876     }
 877     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
 878     {
 879         if (flags & wxRICHTEXT_CTRL_DOWN)
 880             success = MoveEnd(flags);
 881         else
 882             success = MoveToLineEnd(flags);
 883     }
 884
 885     if (success)
 886     {
 887         ScrollIntoView(m_caretPosition, keyCode);
 888         SetDefaultStyleToCursorStyle();
 889     }
 890
 891     return success;
 892 }
 893
 894 /// Extend the selection. Selections are in caret positions.
 895 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
 896 {
 897     if (flags & wxRICHTEXT_SHIFT_DOWN)
 898     {
 899         // If not currently selecting, start selecting
 900         if (m_selectionRange.GetStart() == -2)
 901         {
 902             m_selectionAnchor = oldPos;
 903
 904             if (oldPos > newPos)
 905                 m_selectionRange.SetRange(newPos+1, oldPos);
 906             else
 907                 m_selectionRange.SetRange(oldPos+1, newPos);
 908         }
 909         else
 910         {
 911             // Always ensure that the selection range start is greater than
 912             // the end.
 913             if (newPos > m_selectionAnchor)
 914                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
 915             else
 916                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
 917         }
 918
 919         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
 920         {
 921             wxLogDebug(wxT("Strange selection range"));
 922         }
 923
 924         return true;
 925     }
 926     else
 927         return false;
 928 }
 929
 930 /// Scroll into view, returning true if we scrolled.
 931 /// This takes a _caret_ position.
 932 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
 933 {
 934     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
 935
 936     if (!line)
 937         return false;
 938
 939     int ppuX, ppuY;
 940     GetScrollPixelsPerUnit(& ppuX, & ppuY);
 941
 942     int startXUnits, startYUnits;
 943     GetViewStart(& startXUnits, & startYUnits);
 944     int startY = startYUnits * ppuY;
 945
 946     int sx = 0, sy = 0;
 947     GetVirtualSize(& sx, & sy);
 948     int sxUnits = 0;
 949     int syUnits = 0;
 950     if (ppuY != 0)
 951         syUnits = sy/ppuY;
 952
 953     wxRect rect = line->GetRect();
 954
 955     bool scrolled = false;
 956
 957     wxSize clientSize = GetClientSize();
 958
 959     // Going down
 960     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
 961         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_DOWN ||
 962         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
 963         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
 964     {
 965         if ((rect.y + rect.height) > (clientSize.y + startY))
 966         {
 967             // Make it scroll so this item is at the bottom
 968             // of the window
 969             int y = rect.y - (clientSize.y - rect.height);
 970             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
 971
 972             // If we're still off the screen, scroll another line down
 973             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
 974                 yUnits ++;
 975
 976             if (startYUnits != yUnits)
 977             {
 978                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
 979                 scrolled = true;
 980             }
 981         }
 982         else if (rect.y < startY)
 983         {
 984             // Make it scroll so this item is at the top
 985             // of the window
 986             int y = rect.y ;
 987             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
 988
 989             if (startYUnits != yUnits)
 990             {
 991                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
 992                 scrolled = true;
 993             }
 994         }
 995     }
 996     // Going up
 997     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
 998              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
 999              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1000              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1001     {
1002         if (rect.y < startY)
1003         {
1004             // Make it scroll so this item is at the top
1005             // of the window
1006             int y = rect.y ;
1007             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1008
1009             if (startYUnits != yUnits)
1010             {
1011                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1012                 scrolled = true;
1013             }
1014         }
1015         else if ((rect.y + rect.height) > (clientSize.y + startY))
1016         {
1017             // Make it scroll so this item is at the bottom
1018             // of the window
1019             int y = rect.y - (clientSize.y - rect.height);
1020             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1021
1022             // If we're still off the screen, scroll another line down
1023             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1024                 yUnits ++;
1025
1026             if (startYUnits != yUnits)
1027             {
1028                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1029                 scrolled = true;
1030             }
1031         }
1032     }
1033     PositionCaret();
1034
1035     return scrolled;
1036 }
1037
1038 /// Is the given position visible on the screen?
1039 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1040 {
1041     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1042
1043     if (!line)
1044         return false;
1045
1046     int ppuX, ppuY;
1047     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1048
1049     int startX, startY;
1050     GetViewStart(& startX, & startY);
1051     startX = 0;
1052     startY = startY * ppuY;
1053
1054     int sx = 0, sy = 0;
1055     GetVirtualSize(& sx, & sy);
1056     sx = 0;
1057     if (ppuY != 0)
1058         sy = sy/ppuY;
1059
1060     wxRect rect = line->GetRect();
1061
1062     wxSize clientSize = GetClientSize();
1063
1064     return !(((rect.y + rect.height) > (clientSize.y + startY)) || rect.y < startY);
1065 }
1066
1067 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1068 {
1069     m_caretPosition = position;
1070     m_caretAtLineStart = showAtLineStart;
1071 }
1072
1073 /// Move caret one visual step forward: this may mean setting a flag
1074 /// and keeping the same position if we're going from the end of one line
1075 /// to the start of the next, which may be the exact same caret position.
1076 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1077 {
1078     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1079
1080     // Only do the check if we're not at the end of the paragraph (where things work OK
1081     // anyway)
1082     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1083     {
1084         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1085
1086         if (line)
1087         {
1088             wxRichTextRange lineRange = line->GetAbsoluteRange();
1089
1090             // We're at the end of a line. See whether we need to
1091             // stay at the same actual caret position but change visual
1092             // position, or not.
1093             if (oldPosition == lineRange.GetEnd())
1094             {
1095                 if (m_caretAtLineStart)
1096                 {
1097                     // We're already at the start of the line, so actually move on now.
1098                     m_caretPosition = oldPosition + 1;
1099                     m_caretAtLineStart = false;
1100                 }
1101                 else
1102                 {
1103                     // We're showing at the end of the line, so keep to
1104                     // the same position but indicate that we're to show
1105                     // at the start of the next line.
1106                     m_caretPosition = oldPosition;
1107                     m_caretAtLineStart = true;
1108                 }
1109                 SetDefaultStyleToCursorStyle();
1110                 return;
1111             }
1112         }
1113     }
1114     m_caretPosition ++;
1115     SetDefaultStyleToCursorStyle();
1116 }
1117
1118 /// Move caret one visual step backward: this may mean setting a flag
1119 /// and keeping the same position if we're going from the end of one line
1120 /// to the start of the next, which may be the exact same caret position.
1121 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1122 {
1123     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1124
1125     // Only do the check if we're not at the start of the paragraph (where things work OK
1126     // anyway)
1127     if (para && (oldPosition != para->GetRange().GetStart()))
1128     {
1129         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1130
1131         if (line)
1132         {
1133             wxRichTextRange lineRange = line->GetAbsoluteRange();
1134
1135             // We're at the start of a line. See whether we need to
1136             // stay at the same actual caret position but change visual
1137             // position, or not.
1138             if (oldPosition == lineRange.GetStart())
1139             {
1140                 m_caretPosition = oldPosition-1;
1141                 m_caretAtLineStart = true;
1142                 return;
1143             }
1144             else if (oldPosition == lineRange.GetEnd())
1145             {
1146                 if (m_caretAtLineStart)
1147                 {
1148                     // We're at the start of the line, so keep the same caret position
1149                     // but clear the start-of-line flag.
1150                     m_caretPosition = oldPosition;
1151                     m_caretAtLineStart = false;
1152                 }
1153                 else
1154                 {
1155                     // We're showing at the end of the line, so go back
1156                     // to the previous character position.
1157                     m_caretPosition = oldPosition - 1;
1158                 }
1159                 SetDefaultStyleToCursorStyle();
1160                 return;
1161             }
1162         }
1163     }
1164     m_caretPosition --;
1165     SetDefaultStyleToCursorStyle();
1166 }
1167
1168 /// Move right
1169 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1170 {
1171     long endPos = GetBuffer().GetRange().GetEnd();
1172
1173     if (m_caretPosition + noPositions < endPos)
1174     {
1175         long oldPos = m_caretPosition;
1176         long newPos = m_caretPosition + noPositions;
1177
1178         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1179         if (!extendSel)
1180             SelectNone();
1181
1182         // Determine by looking at oldPos and m_caretPosition whether
1183         // we moved from the end of a line to the start of the next line, in which case
1184         // we want to adjust the caret position such that it is positioned at the
1185         // start of the next line, rather than jumping past the first character of the
1186         // line.
1187         if (noPositions == 1 && !extendSel)
1188             MoveCaretForward(oldPos);
1189         else
1190             SetCaretPosition(newPos);
1191
1192         PositionCaret();
1193         SetDefaultStyleToCursorStyle();
1194
1195         if (extendSel)
1196             Refresh(false);
1197         return true;
1198     }
1199     else
1200         return false;
1201 }
1202
1203 /// Move left
1204 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1205 {
1206     long startPos = -1;
1207
1208     if (m_caretPosition > startPos - noPositions + 1)
1209     {
1210         long oldPos = m_caretPosition;
1211         long newPos = m_caretPosition - noPositions;
1212         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1213         if (!extendSel)
1214             SelectNone();
1215
1216         if (noPositions == 1 && !extendSel)
1217             MoveCaretBack(oldPos);
1218         else
1219             SetCaretPosition(newPos);
1220
1221         PositionCaret();
1222         SetDefaultStyleToCursorStyle();
1223
1224         if (extendSel)
1225             Refresh(false);
1226         return true;
1227     }
1228     else
1229         return false;
1230 }
1231
1232 /// Move up
1233 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1234 {
1235     return MoveDown(- noLines, flags);
1236 }
1237
1238 /// Move up
1239 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1240 {
1241     if (!GetCaret())
1242         return false;
1243
1244     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1245     wxPoint pt = GetCaret()->GetPosition();
1246     long newLine = lineNumber + noLines;
1247
1248     if (lineNumber != -1)
1249     {
1250         if (noLines > 0)
1251         {
1252             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1253
1254             if (newLine > lastLine)
1255                 return false;
1256         }
1257         else
1258         {
1259             if (newLine < 0)
1260                 return false;
1261         }
1262     }
1263
1264     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1265     if (lineObj)
1266     {
1267         pt.y = lineObj->GetAbsolutePosition().y + 2;
1268     }
1269     else
1270         return false;
1271
1272     long newPos = 0;
1273     wxClientDC dc(this);
1274     PrepareDC(dc);
1275     dc.SetFont(GetFont());
1276
1277     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1278
1279     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1280     {
1281         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1282         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1283         // so we view the caret at the start of the line.
1284         bool caretLineStart = false;
1285         if (hitTest == wxRICHTEXT_HITTEST_BEFORE)
1286         {
1287             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1288             wxRichTextRange lineRange;
1289             if (thisLine)
1290                 lineRange = thisLine->GetAbsoluteRange();
1291
1292             if (thisLine && (newPos-1) == lineRange.GetEnd())
1293             {
1294                 newPos --;
1295                 caretLineStart = true;
1296             }
1297             else
1298             {
1299                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1300                 if (para && para->GetRange().GetStart() == newPos)
1301                     newPos --;
1302             }
1303         }
1304
1305         long newSelEnd = newPos;
1306
1307         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1308         if (!extendSel)
1309             SelectNone();
1310
1311         SetCaretPosition(newPos, caretLineStart);
1312         PositionCaret();
1313         SetDefaultStyleToCursorStyle();
1314
1315         if (extendSel)
1316             Refresh(false);
1317         return true;
1318     }
1319
1320     return false;
1321 }
1322
1323 /// Move to the end of the paragraph
1324 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1325 {
1326     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1327     if (para)
1328     {
1329         long newPos = para->GetRange().GetEnd() - 1;
1330         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1331         if (!extendSel)
1332             SelectNone();
1333
1334         SetCaretPosition(newPos);
1335         PositionCaret();
1336         SetDefaultStyleToCursorStyle();
1337
1338         if (extendSel)
1339             Refresh(false);
1340         return true;
1341     }
1342
1343     return false;
1344 }
1345
1346 /// Move to the start of the paragraph
1347 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1348 {
1349     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1350     if (para)
1351     {
1352         long newPos = para->GetRange().GetStart() - 1;
1353         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1354         if (!extendSel)
1355             SelectNone();
1356
1357         SetCaretPosition(newPos);
1358         PositionCaret();
1359         SetDefaultStyleToCursorStyle();
1360
1361         if (extendSel)
1362             Refresh(false);
1363         return true;
1364     }
1365
1366     return false;
1367 }
1368
1369 /// Move to the end of the line
1370 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1371 {
1372     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1373
1374     if (line)
1375     {
1376         wxRichTextRange lineRange = line->GetAbsoluteRange();
1377         long newPos = lineRange.GetEnd();
1378         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1379         if (!extendSel)
1380             SelectNone();
1381
1382         SetCaretPosition(newPos);
1383         PositionCaret();
1384         SetDefaultStyleToCursorStyle();
1385
1386         if (extendSel)
1387             Refresh(false);
1388         return true;
1389     }
1390
1391     return false;
1392 }
1393
1394 /// Move to the start of the line
1395 bool wxRichTextCtrl::MoveToLineStart(int flags)
1396 {
1397     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1398     if (line)
1399     {
1400         wxRichTextRange lineRange = line->GetAbsoluteRange();
1401         long newPos = lineRange.GetStart()-1;
1402
1403         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1404         if (!extendSel)
1405             SelectNone();
1406
1407         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1408
1409         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1410         PositionCaret();
1411         SetDefaultStyleToCursorStyle();
1412
1413         if (extendSel)
1414             Refresh(false);
1415         return true;
1416     }
1417
1418     return false;
1419 }
1420
1421 /// Move to the start of the buffer
1422 bool wxRichTextCtrl::MoveHome(int flags)
1423 {
1424     if (m_caretPosition != -1)
1425     {
1426         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1427         if (!extendSel)
1428             SelectNone();
1429
1430         SetCaretPosition(-1);
1431         PositionCaret();
1432         SetDefaultStyleToCursorStyle();
1433
1434         if (extendSel)
1435             Refresh(false);
1436         return true;
1437     }
1438     else
1439         return false;
1440 }
1441
1442 /// Move to the end of the buffer
1443 bool wxRichTextCtrl::MoveEnd(int flags)
1444 {
1445     long endPos = GetBuffer().GetRange().GetEnd()-1;
1446
1447     if (m_caretPosition != endPos)
1448     {
1449         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1450         if (!extendSel)
1451             SelectNone();
1452
1453         SetCaretPosition(endPos);
1454         PositionCaret();
1455         SetDefaultStyleToCursorStyle();
1456
1457         if (extendSel)
1458             Refresh(false);
1459         return true;
1460     }
1461     else
1462         return false;
1463 }
1464
1465 /// Move noPages pages up
1466 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1467 {
1468     return PageDown(- noPages, flags);
1469 }
1470
1471 /// Move noPages pages down
1472 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1473 {
1474     // Calculate which line occurs noPages * screen height further down.
1475     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1476     if (line)
1477     {
1478         wxSize clientSize = GetClientSize();
1479         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1480
1481         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1482         if (newLine)
1483         {
1484             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1485             long pos = lineRange.GetStart()-1;
1486             if (pos != m_caretPosition)
1487             {
1488                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1489
1490                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1491                 if (!extendSel)
1492                     SelectNone();
1493
1494                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1495                 PositionCaret();
1496                 SetDefaultStyleToCursorStyle();
1497
1498                 if (extendSel)
1499                     Refresh(false);
1500                 return true;
1501             }
1502         }
1503     }
1504
1505     return false;
1506 }
1507
1508 // Finds the caret position for the next word
1509 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1510 {
1511     long endPos = GetBuffer().GetRange().GetEnd();
1512
1513     if (direction > 0)
1514     {
1515         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1516
1517         // First skip current text to space
1518         while (i < endPos && i > -1)
1519         {
1520             // i is in character, not caret positions
1521             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1522             if (text != wxT(" ") && !text.empty())
1523                 i += direction;
1524             else
1525             {
1526                 break;
1527             }
1528         }
1529         while (i < endPos && i > -1)
1530         {
1531             // i is in character, not caret positions
1532             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1533             if (text.empty()) // End of paragraph, or maybe an image
1534                 return wxMax(-1, i - 1);
1535             else if (text == wxT(" ") || text.empty())
1536                 i += direction;
1537             else
1538             {
1539                 // Convert to caret position
1540                 return wxMax(-1, i - 1);
1541             }
1542         }
1543         if (i >= endPos)
1544             return endPos-1;
1545         return i-1;
1546     }
1547     else
1548     {
1549         long i = m_caretPosition;
1550
1551         // First skip white space
1552         while (i < endPos && i > -1)
1553         {
1554             // i is in character, not caret positions
1555             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1556             if (text.empty()) // End of paragraph, or maybe an image
1557                 break;
1558             else if (text == wxT(" ") || text.empty())
1559                 i += direction;
1560             else
1561                 break;
1562         }
1563         // Next skip current text to space
1564         while (i < endPos && i > -1)
1565         {
1566             // i is in character, not caret positions
1567             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1568             if (text != wxT(" ") /* && !text.empty() */)
1569                 i += direction;
1570             else
1571             {
1572                 return i;
1573             }
1574         }
1575         if (i < -1)
1576             return -1;
1577         return i;
1578     }
1579 }
1580
1581 /// Move n words left
1582 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1583 {
1584     long pos = FindNextWordPosition(-1);
1585     if (pos != m_caretPosition)
1586     {
1587         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1588
1589         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1590         if (!extendSel)
1591             SelectNone();
1592
1593         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1594         PositionCaret();
1595         SetDefaultStyleToCursorStyle();
1596
1597         if (extendSel)
1598             Refresh(false);
1599         return true;
1600     }
1601
1602     return false;
1603 }
1604
1605 /// Move n words right
1606 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1607 {
1608     long pos = FindNextWordPosition(1);
1609     if (pos != m_caretPosition)
1610     {
1611         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1612
1613         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1614         if (!extendSel)
1615             SelectNone();
1616
1617         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1618         PositionCaret();
1619         SetDefaultStyleToCursorStyle();
1620
1621         if (extendSel)
1622             Refresh(false);
1623         return true;
1624     }
1625
1626     return false;
1627 }
1628
1629 /// Sizing
1630 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1631 {
1632     // Only do sizing optimization for large buffers
1633     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1634     {
1635         m_fullLayoutRequired = true;
1636         m_fullLayoutTime = wxGetLocalTimeMillis();
1637         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1638         LayoutContent(true /* onlyVisibleRect */);
1639     }
1640     else
1641         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1642
1643 #if wxRICHTEXT_BUFFERED_PAINTING
1644     RecreateBuffer();
1645 #endif
1646
1647     event.Skip();
1648 }
1649
1650
1651 /// Idle-time processing
1652 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1653 {
1654     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1655
1656     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1657     {
1658         m_fullLayoutRequired = false;
1659         m_fullLayoutTime = 0;
1660         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1661         ShowPosition(m_fullLayoutSavedPosition);
1662         Refresh(false);
1663     }
1664
1665     if (m_caretPositionForDefaultStyle != -2)
1666     {
1667         // If the caret position has changed, no longer reflect the default style
1668         // in the UI.
1669         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1670             m_caretPositionForDefaultStyle = -2;
1671     }
1672
1673     event.Skip();
1674 }
1675
1676 /// Scrolling
1677 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1678 {
1679     // Not used
1680     event.Skip();
1681 }
1682
1683 /// Set up scrollbars, e.g. after a resize
1684 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1685 {
1686     if (m_freezeCount)
1687         return;
1688
1689     if (GetBuffer().IsEmpty())
1690     {
1691         SetScrollbars(0, 0, 0, 0, 0, 0);
1692         return;
1693     }
1694
1695     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1696     // of pixels. See e.g. wxVScrolledWindow for ideas.
1697     int pixelsPerUnit = 5;
1698     wxSize clientSize = GetClientSize();
1699
1700     int maxHeight = GetBuffer().GetCachedSize().y;
1701
1702     // Round up so we have at least maxHeight pixels
1703     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1704
1705     int startX = 0, startY = 0;
1706     if (!atTop)
1707         GetViewStart(& startX, & startY);
1708
1709     int maxPositionX = 0; // wxMax(sz.x - clientSize.x, 0);
1710     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
1711
1712     // Move to previous scroll position if
1713     // possible
1714     SetScrollbars(0, pixelsPerUnit,
1715         0, unitsY,
1716         wxMin(maxPositionX, startX), wxMin(maxPositionY, startY));
1717 }
1718
1719 /// Paint the background
1720 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1721 {
1722     wxColour backgroundColour = GetBackgroundColour();
1723     if (!backgroundColour.Ok())
1724         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1725
1726     // Clear the background
1727     dc.SetBrush(wxBrush(backgroundColour));
1728     dc.SetPen(*wxTRANSPARENT_PEN);
1729     wxRect windowRect(GetClientSize());
1730     windowRect.x -= 2; windowRect.y -= 2;
1731     windowRect.width += 4; windowRect.height += 4;
1732
1733     // We need to shift the rectangle to take into account
1734     // scrolling. Converting device to logical coordinates.
1735     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1736     dc.DrawRectangle(windowRect);
1737 }
1738
1739 #if wxRICHTEXT_BUFFERED_PAINTING
1740 /// Recreate buffer bitmap if necessary
1741 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1742 {
1743     wxSize sz = size;
1744     if (sz == wxDefaultSize)
1745         sz = GetClientSize();
1746
1747     if (sz.x < 1 || sz.y < 1)
1748         return false;
1749
1750     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1751         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1752     return m_bufferBitmap.Ok();
1753 }
1754 #endif
1755
1756 // ----------------------------------------------------------------------------
1757 // file IO functions
1758 // ----------------------------------------------------------------------------
1759
1760 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
1761 {
1762     bool success = GetBuffer().LoadFile(filename, fileType);
1763     if (success)
1764         m_filename = filename;
1765
1766     DiscardEdits();
1767     SetInsertionPoint(0);
1768     LayoutContent();
1769     PositionCaret();
1770     SetupScrollbars(true);
1771     Refresh(false);
1772     SendTextUpdatedEvent();
1773
1774     if (success)
1775         return true;
1776     else
1777     {
1778         wxLogError(_("File couldn't be loaded."));
1779
1780         return false;
1781     }
1782 }
1783
1784 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
1785 {
1786     if (GetBuffer().SaveFile(filename, fileType))
1787     {
1788         m_filename = filename;
1789
1790         DiscardEdits();
1791
1792         return true;
1793     }
1794
1795     wxLogError(_("The text couldn't be saved."));
1796
1797     return false;
1798 }
1799
1800 // ----------------------------------------------------------------------------
1801 // wxRichTextCtrl specific functionality
1802 // ----------------------------------------------------------------------------
1803
1804 /// Add a new paragraph of text to the end of the buffer
1805 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
1806 {
1807     return GetBuffer().AddParagraph(text);
1808 }
1809
1810 /// Add an image
1811 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
1812 {
1813     return GetBuffer().AddImage(image);
1814 }
1815
1816 // ----------------------------------------------------------------------------
1817 // selection and ranges
1818 // ----------------------------------------------------------------------------
1819
1820 void wxRichTextCtrl::SelectAll()
1821 {
1822     SetSelection(0, GetLastPosition()+1);
1823     m_selectionAnchor = -1;
1824 }
1825
1826 /// Select none
1827 void wxRichTextCtrl::SelectNone()
1828 {
1829     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
1830         SetSelection(-2, -2);
1831     m_selectionAnchor = -2;
1832 }
1833
1834 static bool wxIsWordDelimiter(const wxString& text)
1835 {
1836     return !text.IsEmpty() && !wxIsalnum(text[0]);
1837 }
1838
1839 /// Select the word at the given character position
1840 bool wxRichTextCtrl::SelectWord(long position)
1841 {
1842     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
1843         return false;
1844
1845     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
1846     if (!para)
1847         return false;
1848
1849     long positionStart = position;
1850     long positionEnd = position;
1851
1852     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
1853     {
1854         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
1855         if (wxIsWordDelimiter(text))
1856         {
1857             positionStart ++;
1858             break;
1859         }
1860     }
1861     if (positionStart < para->GetRange().GetStart())
1862         positionStart = para->GetRange().GetStart();
1863
1864     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
1865     {
1866         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
1867         if (wxIsWordDelimiter(text))
1868         {
1869             positionEnd --;
1870             break;
1871         }
1872     }
1873     if (positionEnd >= para->GetRange().GetEnd())
1874         positionEnd = para->GetRange().GetEnd();
1875
1876     SetSelection(positionStart, positionEnd+1);
1877
1878     if (positionStart >= 0)
1879     {
1880         MoveCaret(positionStart-1, true);
1881         SetDefaultStyleToCursorStyle();
1882     }
1883
1884     return true;
1885 }
1886
1887 wxString wxRichTextCtrl::GetStringSelection() const
1888 {
1889     long from, to;
1890     GetSelection(&from, &to);
1891
1892     return GetRange(from, to);
1893 }
1894
1895 // ----------------------------------------------------------------------------
1896 // hit testing
1897 // ----------------------------------------------------------------------------
1898
1899 wxTextCtrlHitTestResult
1900 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
1901 {
1902     // implement in terms of the other overload as the native ports typically
1903     // can get the position and not (x, y) pair directly (although wxUniv
1904     // directly gets x and y -- and so overrides this method as well)
1905     long pos;
1906     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
1907
1908     if ( rc != wxTE_HT_UNKNOWN )
1909     {
1910         PositionToXY(pos, x, y);
1911     }
1912
1913     return rc;
1914 }
1915
1916 wxTextCtrlHitTestResult
1917 wxRichTextCtrl::HitTest(const wxPoint& pt,
1918                         long * pos) const
1919 {
1920     wxClientDC dc((wxRichTextCtrl*) this);
1921     ((wxRichTextCtrl*)this)->PrepareDC(dc);
1922
1923     // Buffer uses logical position (relative to start of buffer)
1924     // so convert
1925     wxPoint pt2 = GetLogicalPoint(pt);
1926
1927     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
1928
1929     switch ( hit )
1930     {
1931         case wxRICHTEXT_HITTEST_BEFORE:
1932             return wxTE_HT_BEFORE;
1933
1934         case wxRICHTEXT_HITTEST_AFTER:
1935             return wxTE_HT_BEYOND;
1936
1937         case wxRICHTEXT_HITTEST_ON:
1938             return wxTE_HT_ON_TEXT;
1939     }
1940
1941     return wxTE_HT_UNKNOWN;
1942 }
1943
1944 // ----------------------------------------------------------------------------
1945 // set/get the controls text
1946 // ----------------------------------------------------------------------------
1947
1948 wxString wxRichTextCtrl::GetValue() const
1949 {
1950     return GetBuffer().GetText();
1951 }
1952
1953 wxString wxRichTextCtrl::GetRange(long from, long to) const
1954 {
1955     // Public API for range is different from internals
1956     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
1957 }
1958
1959 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
1960 {
1961     Clear();
1962
1963     // if the text is long enough, it's faster to just set it instead of first
1964     // comparing it with the old one (chances are that it will be different
1965     // anyhow, this comparison is there to avoid flicker for small single-line
1966     // edit controls mostly)
1967     if ( (value.length() > 0x400) || (value != GetValue()) )
1968     {
1969         DoWriteText(value);
1970
1971         // for compatibility, don't move the cursor when doing SetValue()
1972         SetInsertionPoint(0);
1973     }
1974     else // same text
1975     {
1976         if ( flags & SetValue_SendEvent )
1977         {
1978             // still send an event for consistency
1979             SendTextUpdatedEvent();
1980         }
1981     }
1982
1983     // we should reset the modified flag even if the value didn't really change
1984
1985     // mark the control as being not dirty - we changed its text, not the
1986     // user
1987     DiscardEdits();
1988 }
1989
1990 void wxRichTextCtrl::WriteText(const wxString& value)
1991 {
1992     DoWriteText(value);
1993 }
1994
1995 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
1996 {
1997     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
1998
1999     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this);
2000
2001     if ( flags & SetValue_SendEvent )
2002         SendTextUpdatedEvent();
2003 }
2004
2005 void wxRichTextCtrl::AppendText(const wxString& text)
2006 {
2007     SetInsertionPointEnd();
2008
2009     WriteText(text);
2010 }
2011
2012 /// Write an image at the current insertion point
2013 bool wxRichTextCtrl::WriteImage(const wxImage& image, int bitmapType)
2014 {
2015     wxRichTextImageBlock imageBlock;
2016
2017     wxImage image2 = image;
2018     if (imageBlock.MakeImageBlock(image2, bitmapType))
2019         return WriteImage(imageBlock);
2020
2021     return false;
2022 }
2023
2024 bool wxRichTextCtrl::WriteImage(const wxString& filename, int bitmapType)
2025 {
2026     wxRichTextImageBlock imageBlock;
2027
2028     wxImage image;
2029     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2030         return WriteImage(imageBlock);
2031
2032     return false;
2033 }
2034
2035 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2036 {
2037     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2038 }
2039
2040 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, int bitmapType)
2041 {
2042     if (bitmap.Ok())
2043     {
2044         wxRichTextImageBlock imageBlock;
2045
2046         wxImage image = bitmap.ConvertToImage();
2047         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2048             return WriteImage(imageBlock);
2049     }
2050
2051     return false;
2052 }
2053
2054 /// Insert a newline (actually paragraph) at the current insertion point.
2055 bool wxRichTextCtrl::Newline()
2056 {
2057     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
2058 }
2059
2060
2061 // ----------------------------------------------------------------------------
2062 // Clipboard operations
2063 // ----------------------------------------------------------------------------
2064
2065 void wxRichTextCtrl::Copy()
2066 {
2067     if (CanCopy())
2068     {
2069         wxRichTextRange range = GetInternalSelectionRange();
2070         GetBuffer().CopyToClipboard(range);
2071     }
2072 }
2073
2074 void wxRichTextCtrl::Cut()
2075 {
2076     if (CanCut())
2077     {
2078         wxRichTextRange range = GetInternalSelectionRange();
2079         GetBuffer().CopyToClipboard(range);
2080
2081         DeleteSelectedContent();
2082         LayoutContent();
2083         Refresh(false);
2084     }
2085 }
2086
2087 void wxRichTextCtrl::Paste()
2088 {
2089     if (CanPaste())
2090     {
2091         BeginBatchUndo(_("Paste"));
2092
2093         long newPos = m_caretPosition;
2094         DeleteSelectedContent(& newPos);
2095
2096         GetBuffer().PasteFromClipboard(newPos);
2097
2098         EndBatchUndo();
2099     }
2100 }
2101
2102 void wxRichTextCtrl::DeleteSelection()
2103 {
2104     if (CanDeleteSelection())
2105     {
2106         DeleteSelectedContent();
2107     }
2108 }
2109
2110 bool wxRichTextCtrl::HasSelection() const
2111 {
2112     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2113 }
2114
2115 bool wxRichTextCtrl::CanCopy() const
2116 {
2117     // Can copy if there's a selection
2118     return HasSelection();
2119 }
2120
2121 bool wxRichTextCtrl::CanCut() const
2122 {
2123     return HasSelection() && IsEditable();
2124 }
2125
2126 bool wxRichTextCtrl::CanPaste() const
2127 {
2128     if ( !IsEditable() )
2129         return false;
2130
2131     return GetBuffer().CanPasteFromClipboard();
2132 }
2133
2134 bool wxRichTextCtrl::CanDeleteSelection() const
2135 {
2136     return HasSelection() && IsEditable();
2137 }
2138
2139
2140 // ----------------------------------------------------------------------------
2141 // Accessors
2142 // ----------------------------------------------------------------------------
2143
2144 void wxRichTextCtrl::SetEditable(bool editable)
2145 {
2146     m_editable = editable;
2147 }
2148
2149 void wxRichTextCtrl::SetInsertionPoint(long pos)
2150 {
2151     SelectNone();
2152
2153     m_caretPosition = pos - 1;
2154 }
2155
2156 void wxRichTextCtrl::SetInsertionPointEnd()
2157 {
2158     long pos = GetLastPosition();
2159     SetInsertionPoint(pos);
2160 }
2161
2162 long wxRichTextCtrl::GetInsertionPoint() const
2163 {
2164     return m_caretPosition+1;
2165 }
2166
2167 wxTextPos wxRichTextCtrl::GetLastPosition() const
2168 {
2169     return GetBuffer().GetRange().GetEnd();
2170 }
2171
2172 // If the return values from and to are the same, there is no
2173 // selection.
2174 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2175 {
2176     *from = m_selectionRange.GetStart();
2177     *to = m_selectionRange.GetEnd();
2178     if ((*to) != -1 && (*to) != -2)
2179         (*to) ++;
2180 }
2181
2182 bool wxRichTextCtrl::IsEditable() const
2183 {
2184     return m_editable;
2185 }
2186
2187 // ----------------------------------------------------------------------------
2188 // selection
2189 // ----------------------------------------------------------------------------
2190
2191 void wxRichTextCtrl::SetSelection(long from, long to)
2192 {
2193     // if from and to are both -1, it means (in wxWidgets) that all text should
2194     // be selected.
2195     if ( (from == -1) && (to == -1) )
2196     {
2197         from = 0;
2198         to = GetLastPosition()+1;
2199     }
2200
2201     DoSetSelection(from, to);
2202 }
2203
2204 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2205 {
2206     m_selectionAnchor = from;
2207     m_selectionRange.SetRange(from, to-1);
2208
2209     Refresh(false);
2210     PositionCaret();
2211 }
2212
2213 // ----------------------------------------------------------------------------
2214 // Editing
2215 // ----------------------------------------------------------------------------
2216
2217 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2218                              const wxString& value)
2219 {
2220     BeginBatchUndo(_("Replace"));
2221
2222     DeleteSelectedContent();
2223
2224     DoWriteText(value, SetValue_SelectionOnly);
2225
2226     EndBatchUndo();
2227 }
2228
2229 void wxRichTextCtrl::Remove(long from, long to)
2230 {
2231     SelectNone();
2232
2233     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to),
2234         m_caretPosition,       // Current caret position
2235         from,                           // New caret position
2236         this);
2237
2238     LayoutContent();
2239     if (!IsFrozen())
2240         Refresh(false);
2241 }
2242
2243 bool wxRichTextCtrl::IsModified() const
2244 {
2245     return m_buffer.IsModified();
2246 }
2247
2248 void wxRichTextCtrl::MarkDirty()
2249 {
2250     m_buffer.Modify(true);
2251 }
2252
2253 void wxRichTextCtrl::DiscardEdits()
2254 {
2255     m_caretPositionForDefaultStyle = -2;
2256     m_buffer.Modify(false);
2257     m_buffer.GetCommandProcessor()->ClearCommands();
2258 }
2259
2260 int wxRichTextCtrl::GetNumberOfLines() const
2261 {
2262     return GetBuffer().GetParagraphCount();
2263 }
2264
2265 // ----------------------------------------------------------------------------
2266 // Positions <-> coords
2267 // ----------------------------------------------------------------------------
2268
2269 long wxRichTextCtrl::XYToPosition(long x, long y) const
2270 {
2271     return GetBuffer().XYToPosition(x, y);
2272 }
2273
2274 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2275 {
2276     return GetBuffer().PositionToXY(pos, x, y);
2277 }
2278
2279 // ----------------------------------------------------------------------------
2280 //
2281 // ----------------------------------------------------------------------------
2282
2283 void wxRichTextCtrl::ShowPosition(long pos)
2284 {
2285     if (!IsPositionVisible(pos))
2286         ScrollIntoView(pos-1, WXK_DOWN);
2287 }
2288
2289 int wxRichTextCtrl::GetLineLength(long lineNo) const
2290 {
2291     return GetBuffer().GetParagraphLength(lineNo);
2292 }
2293
2294 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2295 {
2296     return GetBuffer().GetParagraphText(lineNo);
2297 }
2298
2299 // ----------------------------------------------------------------------------
2300 // Undo/redo
2301 // ----------------------------------------------------------------------------
2302
2303 void wxRichTextCtrl::Undo()
2304 {
2305     if (CanUndo())
2306     {
2307         GetCommandProcessor()->Undo();
2308     }
2309 }
2310
2311 void wxRichTextCtrl::Redo()
2312 {
2313     if (CanRedo())
2314     {
2315         GetCommandProcessor()->Redo();
2316     }
2317 }
2318
2319 bool wxRichTextCtrl::CanUndo() const
2320 {
2321     return GetCommandProcessor()->CanUndo();
2322 }
2323
2324 bool wxRichTextCtrl::CanRedo() const
2325 {
2326     return GetCommandProcessor()->CanRedo();
2327 }
2328
2329 // ----------------------------------------------------------------------------
2330 // implementation details
2331 // ----------------------------------------------------------------------------
2332
2333 void wxRichTextCtrl::Command(wxCommandEvent& event)
2334 {
2335     SetValue(event.GetString());
2336     GetEventHandler()->ProcessEvent(event);
2337 }
2338
2339 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2340 {
2341     // By default, load the first file into the text window.
2342     if (event.GetNumberOfFiles() > 0)
2343     {
2344         LoadFile(event.GetFiles()[0]);
2345     }
2346 }
2347
2348 wxSize wxRichTextCtrl::DoGetBestSize() const
2349 {
2350     return wxSize(10, 10);
2351 }
2352
2353 // ----------------------------------------------------------------------------
2354 // standard handlers for standard edit menu events
2355 // ----------------------------------------------------------------------------
2356
2357 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2358 {
2359     Cut();
2360 }
2361
2362 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2363 {
2364     DeleteSelection();
2365 }
2366
2367 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2368 {
2369     Copy();
2370 }
2371
2372 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2373 {
2374     Paste();
2375 }
2376
2377 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2378 {
2379     Undo();
2380 }
2381
2382 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2383 {
2384     Redo();
2385 }
2386
2387 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2388 {
2389     event.Enable( CanCut() );
2390 }
2391
2392 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2393 {
2394     event.Enable( CanCopy() );
2395 }
2396
2397 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2398 {
2399     event.Enable( CanDeleteSelection() );
2400 }
2401
2402 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2403 {
2404     event.Enable( CanPaste() );
2405 }
2406
2407 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2408 {
2409     event.Enable( CanUndo() );
2410     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2411 }
2412
2413 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2414 {
2415     event.Enable( CanRedo() );
2416     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2417 }
2418
2419 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2420 {
2421     SelectAll();
2422 }
2423
2424 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2425 {
2426     event.Enable(GetLastPosition() > 0);
2427 }
2428
2429 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& WXUNUSED(event))
2430 {
2431     if (!m_contextMenu)
2432     {
2433         m_contextMenu = new wxMenu;
2434         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2435         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2436         m_contextMenu->AppendSeparator();
2437         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2438         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2439         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2440         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2441         m_contextMenu->AppendSeparator();
2442         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2443     }
2444     PopupMenu(m_contextMenu);
2445     return;
2446 }
2447
2448 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttrEx& style)
2449 {
2450     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style);
2451 }
2452
2453 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2454 {
2455     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttrEx(style));
2456 }
2457
2458 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxRichTextAttr& style)
2459 {
2460     return GetBuffer().SetStyle(range.ToInternal(), style);
2461 }
2462
2463 // extended style setting operation with flags including:
2464 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2465 // see richtextbuffer.h for more details.
2466 bool wxRichTextCtrl::SetStyleEx(long start, long end, const wxTextAttrEx& style, int flags)
2467 {
2468     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style, flags);
2469 }
2470
2471 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttrEx& style, int flags)
2472 {
2473     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2474 }
2475
2476 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxRichTextAttr& style, int flags)
2477 {
2478     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2479 }
2480
2481 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttrEx& style)
2482 {
2483     return GetBuffer().SetDefaultStyle(style);
2484 }
2485
2486 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2487 {
2488     return GetBuffer().SetDefaultStyle(wxTextAttrEx(style));
2489 }
2490
2491 const wxTextAttrEx& wxRichTextCtrl::GetDefaultStyleEx() const
2492 {
2493     return GetBuffer().GetDefaultStyle();
2494 }
2495
2496 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2497 {
2498     return GetBuffer().GetDefaultStyle();
2499 }
2500
2501 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2502 {
2503     wxTextAttrEx attr(style);
2504     if (GetBuffer().GetStyle(position, attr))
2505     {
2506         style = attr;
2507         return true;
2508     }
2509     else
2510         return false;
2511 }
2512
2513 bool wxRichTextCtrl::GetStyle(long position, wxTextAttrEx& style)
2514 {
2515     return GetBuffer().GetStyle(position, style);
2516 }
2517
2518 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style)
2519 {
2520     return GetBuffer().GetStyle(position, style);
2521 }
2522
2523 /// Get the content (uncombined) attributes for this position.
2524
2525 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2526 {
2527     wxTextAttrEx attr(style);
2528     if (GetBuffer().GetUncombinedStyle(position, attr))
2529     {
2530         style = attr;
2531         return true;
2532     }
2533     else
2534         return false;
2535 }
2536
2537 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttrEx& style)
2538 {
2539     return GetBuffer().GetUncombinedStyle(position, style);
2540 }
2541
2542 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style)
2543 {
2544     return GetBuffer().GetUncombinedStyle(position, style);
2545 }
2546
2547 /// Set font, and also the buffer attributes
2548 bool wxRichTextCtrl::SetFont(const wxFont& font)
2549 {
2550     wxControl::SetFont(font);
2551
2552     wxTextAttrEx attr = GetBuffer().GetAttributes();
2553     attr.SetFont(font);
2554     GetBuffer().SetBasicStyle(attr);
2555
2556     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2557     Refresh(false);
2558
2559     return true;
2560 }
2561
2562 /// Transform logical to physical
2563 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2564 {
2565     wxPoint pt;
2566     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2567
2568     return pt;
2569 }
2570
2571 /// Transform physical to logical
2572 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2573 {
2574     wxPoint pt;
2575     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2576
2577     return pt;
2578 }
2579
2580 /// Position the caret
2581 void wxRichTextCtrl::PositionCaret()
2582 {
2583     if (!GetCaret())
2584         return;
2585
2586     //wxLogDebug(wxT("PositionCaret"));
2587
2588     wxRect caretRect;
2589     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2590     {
2591         wxPoint originalPt = caretRect.GetPosition();
2592         wxPoint pt = GetPhysicalPoint(originalPt);
2593         if (GetCaret()->GetPosition() != pt)
2594         {
2595             GetCaret()->Move(pt);
2596             GetCaret()->SetSize(caretRect.GetSize());
2597         }
2598     }
2599 }
2600
2601 /// Get the caret height and position for the given character position
2602 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2603 {
2604     wxClientDC dc(this);
2605     dc.SetFont(GetFont());
2606
2607     PrepareDC(dc);
2608
2609     wxPoint pt;
2610     int height = 0;
2611
2612     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2613     {
2614         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2615         return true;
2616     }
2617
2618     return false;
2619 }
2620
2621 /// Gets the line for the visible caret position. If the caret is
2622 /// shown at the very end of the line, it means the next character is actually
2623 /// on the following line. So let's get the line we're expecting to find
2624 /// if this is the case.
2625 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2626 {
2627     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2628     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2629     if (line)
2630     {
2631         wxRichTextRange lineRange = line->GetAbsoluteRange();
2632         if (caretPosition == lineRange.GetStart()-1 &&
2633             (para->GetRange().GetStart() != lineRange.GetStart()))
2634         {
2635             if (!m_caretAtLineStart)
2636                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2637         }
2638     }
2639     return line;
2640 }
2641
2642
2643 /// Move the caret to the given character position
2644 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2645 {
2646     if (GetBuffer().GetDirty())
2647         LayoutContent();
2648
2649     if (pos <= GetBuffer().GetRange().GetEnd())
2650     {
2651         SetCaretPosition(pos, showAtLineStart);
2652
2653         PositionCaret();
2654
2655         return true;
2656     }
2657     else
2658         return false;
2659 }
2660
2661 /// Layout the buffer: which we must do before certain operations, such as
2662 /// setting the caret position.
2663 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2664 {
2665     if (GetBuffer().GetDirty() || onlyVisibleRect)
2666     {
2667         wxRect availableSpace(GetClientSize());
2668         if (availableSpace.width == 0)
2669             availableSpace.width = 10;
2670         if (availableSpace.height == 0)
2671             availableSpace.height = 10;
2672
2673         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2674         if (onlyVisibleRect)
2675         {
2676             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2677             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2678         }
2679
2680         wxClientDC dc(this);
2681         dc.SetFont(GetFont());
2682
2683         PrepareDC(dc);
2684
2685         GetBuffer().Defragment();
2686         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2687         GetBuffer().Layout(dc, availableSpace, flags);
2688         GetBuffer().SetDirty(false);
2689
2690         if (!IsFrozen())
2691             SetupScrollbars();
2692     }
2693
2694     return true;
2695 }
2696
2697 /// Is all of the selection bold?
2698 bool wxRichTextCtrl::IsSelectionBold()
2699 {
2700     if (HasSelection())
2701     {
2702         wxRichTextAttr attr;
2703         wxRichTextRange range = GetInternalSelectionRange();
2704         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2705         attr.SetFontWeight(wxBOLD);
2706
2707         return HasCharacterAttributes(range, attr);
2708     }
2709     else
2710     {
2711         // If no selection, then we need to combine current style with default style
2712         // to see what the effect would be if we started typing.
2713         wxRichTextAttr attr;
2714         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2715
2716         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2717         if (GetStyle(pos, attr))
2718         {
2719             if (IsDefaultStyleShowing())
2720                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2721             return attr.GetFontWeight() == wxBOLD;
2722         }
2723     }
2724     return false;
2725 }
2726
2727 /// Is all of the selection italics?
2728 bool wxRichTextCtrl::IsSelectionItalics()
2729 {
2730     if (HasSelection())
2731     {
2732         wxRichTextRange range = GetInternalSelectionRange();
2733         wxRichTextAttr attr;
2734         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2735         attr.SetFontStyle(wxITALIC);
2736
2737         return HasCharacterAttributes(range, attr);
2738     }
2739     else
2740     {
2741         // If no selection, then we need to combine current style with default style
2742         // to see what the effect would be if we started typing.
2743         wxRichTextAttr attr;
2744         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2745
2746         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2747         if (GetStyle(pos, attr))
2748         {
2749             if (IsDefaultStyleShowing())
2750                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2751             return attr.GetFontStyle() == wxITALIC;
2752         }
2753     }
2754     return false;
2755 }
2756
2757 /// Is all of the selection underlined?
2758 bool wxRichTextCtrl::IsSelectionUnderlined()
2759 {
2760     if (HasSelection())
2761     {
2762         wxRichTextRange range = GetInternalSelectionRange();
2763         wxRichTextAttr attr;
2764         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2765         attr.SetFontUnderlined(true);
2766
2767         return HasCharacterAttributes(range, attr);
2768     }
2769     else
2770     {
2771         // If no selection, then we need to combine current style with default style
2772         // to see what the effect would be if we started typing.
2773         wxRichTextAttr attr;
2774         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2775         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2776
2777         if (GetStyle(pos, attr))
2778         {
2779             if (IsDefaultStyleShowing())
2780                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2781             return attr.GetFontUnderlined();
2782         }
2783     }
2784     return false;
2785 }
2786
2787 /// Apply bold to the selection
2788 bool wxRichTextCtrl::ApplyBoldToSelection()
2789 {
2790     wxRichTextAttr attr;
2791     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2792     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
2793
2794     if (HasSelection())
2795         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2796     else
2797         SetAndShowDefaultStyle(attr);
2798     return true;
2799 }
2800
2801 /// Apply italic to the selection
2802 bool wxRichTextCtrl::ApplyItalicToSelection()
2803 {
2804     wxRichTextAttr attr;
2805     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2806     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
2807
2808     if (HasSelection())
2809         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2810     else
2811         SetAndShowDefaultStyle(attr);
2812     return true;
2813 }
2814
2815 /// Apply underline to the selection
2816 bool wxRichTextCtrl::ApplyUnderlineToSelection()
2817 {
2818     wxRichTextAttr attr;
2819     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2820     attr.SetFontUnderlined(!IsSelectionUnderlined());
2821
2822     if (HasSelection())
2823         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2824     else
2825         SetAndShowDefaultStyle(attr);
2826     return true;
2827 }
2828
2829 /// Is all of the selection aligned according to the specified flag?
2830 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
2831 {
2832     wxRichTextRange range;
2833     if (HasSelection())
2834         range = GetInternalSelectionRange();
2835     else
2836         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+1);
2837
2838     wxRichTextAttr attr;
2839     attr.SetAlignment(alignment);
2840
2841     return HasParagraphAttributes(range, attr);
2842 }
2843
2844 /// Apply alignment to the selection
2845 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
2846 {
2847     wxRichTextAttr attr;
2848     attr.SetAlignment(alignment);
2849     if (HasSelection())
2850         return SetStyle(GetSelectionRange(), attr);
2851     else
2852     {
2853         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
2854         if (para)
2855             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
2856     }
2857     return true;
2858 }
2859
2860 /// Apply a named style to the selection
2861 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
2862 {
2863     // Flags are defined within each definition, so only certain
2864     // attributes are applied.
2865     wxRichTextAttr attr(def->GetStyle());
2866
2867     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE;
2868
2869     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
2870     {
2871         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2872
2873         wxRichTextRange range;
2874
2875         if (HasSelection())
2876             range = GetSelectionRange();
2877         else
2878         {
2879             long pos = GetAdjustedCaretPosition(GetCaretPosition());
2880             range = wxRichTextRange(pos, pos+1);
2881         }
2882
2883         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
2884     }
2885
2886     // Make sure the attr has the style name
2887     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
2888     {
2889         attr.SetParagraphStyleName(def->GetName());
2890
2891         // If applying a paragraph style, we only want the paragraph nodes to adopt these
2892         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
2893         // to change its style independently.
2894         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2895     }
2896     else
2897         attr.SetCharacterStyleName(def->GetName());
2898
2899     if (HasSelection())
2900         return SetStyleEx(GetSelectionRange(), attr, flags);
2901     else
2902     {
2903         SetAndShowDefaultStyle(attr);
2904         return true;
2905     }
2906 }
2907
2908 /// Apply the style sheet to the buffer, for example if the styles have changed.
2909 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
2910 {
2911     if (!styleSheet)
2912         styleSheet = GetBuffer().GetStyleSheet();
2913     if (!styleSheet)
2914         return false;
2915
2916     if (GetBuffer().ApplyStyleSheet(styleSheet))
2917     {
2918         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2919         Refresh(false);
2920         return true;
2921     }
2922     else
2923         return false;
2924 }
2925
2926 /// Sets the default style to the style under the cursor
2927 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
2928 {
2929     wxTextAttrEx attr;
2930     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
2931
2932     // If at the start of a paragraph, use the next position.
2933     long pos = GetAdjustedCaretPosition(GetCaretPosition());
2934
2935 #if wxRICHTEXT_USE_DYNAMIC_STYLES
2936     if (GetUncombinedStyle(pos, attr))
2937 #else
2938     if (GetStyle(pos, attr))
2939 #endif
2940     {
2941         SetDefaultStyle(attr);
2942         return true;
2943     }
2944
2945     return false;
2946 }
2947
2948 /// Returns the first visible position in the current view
2949 long wxRichTextCtrl::GetFirstVisiblePosition() const
2950 {
2951     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
2952     if (line)
2953         return line->GetAbsoluteRange().GetStart();
2954     else
2955         return 0;
2956 }
2957
2958 /// Get the first visible point in the window
2959 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
2960 {
2961     int ppuX, ppuY;
2962     int startXUnits, startYUnits;
2963
2964     GetScrollPixelsPerUnit(& ppuX, & ppuY);
2965     GetViewStart(& startXUnits, & startYUnits);
2966
2967     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
2968 }
2969
2970 /// The adjusted caret position is the character position adjusted to take
2971 /// into account whether we're at the start of a paragraph, in which case
2972 /// style information should be taken from the next position, not current one.
2973 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
2974 {
2975     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
2976
2977     if (para && (caretPos+1 == para->GetRange().GetStart()))
2978         caretPos ++;
2979     return caretPos;
2980 }
2981
2982 /// Get/set the selection range in character positions. -1, -1 means no selection.
2983 /// The range is in API convention, i.e. a single character selection is denoted
2984 /// by (n, n+1)
2985 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
2986 {
2987     wxRichTextRange range = GetInternalSelectionRange();
2988     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
2989         range.SetEnd(range.GetEnd() + 1);
2990     return range;
2991 }
2992
2993 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
2994 {
2995     wxRichTextRange range1(range);
2996     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
2997         range1.SetEnd(range1.GetEnd() - 1);
2998
2999     wxASSERT( range1.GetStart() > range1.GetEnd() );
3000
3001     SetInternalSelectionRange(range1);
3002 }
3003
3004 /// Set list style
3005 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3006 {
3007     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3008 }
3009
3010 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3011 {
3012     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3013 }
3014
3015 /// Clear list for given range
3016 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3017 {
3018     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3019 }
3020
3021 /// Number/renumber any list elements in the given range
3022 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3023 {
3024     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3025 }
3026
3027 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3028 {
3029     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3030 }
3031
3032 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3033 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3034 {
3035     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3036 }
3037
3038 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3039 {
3040     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3041 }
3042
3043 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3044 {
3045     if (sm_availableFontNames.GetCount() == 0)
3046     {
3047         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3048         sm_availableFontNames.Sort();
3049     }
3050     return sm_availableFontNames;
3051 }
3052
3053 void wxRichTextCtrl::ClearAvailableFontNames()
3054 {
3055     sm_availableFontNames.Clear();
3056 }
3057
3058 #endif
3059     // wxUSE_RICHTEXT