src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richeditctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/textfile.h"
  30 #include "wx/ffile.h"
  31 #include "wx/filename.h"
  32 #include "wx/dcbuffer.h"
  33 #include "wx/arrimpl.cpp"
  34 #include "wx/fontenum.h"
  35
  36 // DLL options compatibility check:
  37 #include "wx/app.h"
  38 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  39
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_CLICK)
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RETURN)
  45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CHARACTER)
  46 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_DELETE)
  47
  48 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING)
  49 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED)
  50 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING)
  51 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED)
  52
  53 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED)
  54 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED)
  55 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED)
  56 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED)
  57
  58 IMPLEMENT_CLASS( wxRichTextCtrl, wxControl )
  59
  60 IMPLEMENT_CLASS( wxRichTextEvent, wxNotifyEvent )
  61
  62 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
  63     EVT_PAINT(wxRichTextCtrl::OnPaint)
  64     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
  65     EVT_IDLE(wxRichTextCtrl::OnIdle)
  66     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
  67     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
  68     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
  69     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
  70     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
  71     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
  72     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
  73     EVT_CHAR(wxRichTextCtrl::OnChar)
  74     EVT_SIZE(wxRichTextCtrl::OnSize)
  75     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
  76     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
  77     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
  78     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
  79
  80     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
  81     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
  82
  83     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
  84     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
  85
  86     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
  87     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
  88
  89     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
  90     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
  91
  92     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
  93     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
  94
  95     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
  96     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
  97
  98     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
  99     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 100 END_EVENT_TABLE()
 101
 102 /*!
 103  * wxRichTextCtrl
 104  */
 105
 106 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 107
 108 wxRichTextCtrl::wxRichTextCtrl()
 109               : wxScrollHelper(this)
 110 {
 111     Init();
 112 }
 113
 114 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 115                                wxWindowID id,
 116                                const wxString& value,
 117                                const wxPoint& pos,
 118                                const wxSize& size,
 119                                long style,
 120                                const wxValidator& validator,
 121                                const wxString& name)
 122               : wxScrollHelper(this)
 123 {
 124     Init();
 125     Create(parent, id, value, pos, size, style, validator, name);
 126 }
 127
 128 /// Creation
 129 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 130                              const wxValidator& validator, const wxString& name)
 131 {
 132     if (!wxTextCtrlBase::Create(parent, id, pos, size,
 133                                 style|wxFULL_REPAINT_ON_RESIZE,
 134                                 validator, name))
 135         return false;
 136
 137     if (!GetFont().Ok())
 138     {
 139         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 140     }
 141
 142     GetBuffer().Reset();
 143     GetBuffer().SetRichTextCtrl(this);
 144
 145     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 146     GetCaret()->Show();
 147
 148     if (style & wxTE_READONLY)
 149         SetEditable(false);
 150
 151     // The base attributes must all have default values
 152     wxTextAttrEx attributes;
 153     attributes.SetFont(GetFont());
 154     attributes.SetTextColour(*wxBLACK);
 155     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 156     attributes.SetLineSpacing(10);
 157     attributes.SetParagraphSpacingAfter(10);
 158     attributes.SetParagraphSpacingBefore(0);
 159     attributes.SetTextEffects(0);
 160     attributes.SetTextEffectFlags(wxTEXT_ATTR_EFFECT_STRIKETHROUGH|wxTEXT_ATTR_EFFECT_CAPITALS);
 161
 162     SetBasicStyle(attributes);
 163
 164     // The default attributes will be merged with base attributes, so
 165     // can be empty to begin with
 166     wxTextAttrEx defaultAttributes;
 167     SetDefaultStyle(defaultAttributes);
 168
 169     SetBackgroundColour(*wxWHITE);
 170     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 171
 172     // Tell the sizers to use the given or best size
 173     SetInitialSize(size);
 174
 175 #if wxRICHTEXT_BUFFERED_PAINTING
 176     // Create a buffer
 177     RecreateBuffer(size);
 178 #endif
 179
 180     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 181     m_urlCursor = wxCursor(wxCURSOR_HAND);
 182
 183     SetCursor(m_textCursor);
 184
 185     if (!value.IsEmpty())
 186         SetValue(value);
 187
 188     GetBuffer().AddEventHandler(this);
 189
 190     return true;
 191 }
 192
 193 wxRichTextCtrl::~wxRichTextCtrl()
 194 {
 195     GetBuffer().RemoveEventHandler(this);
 196
 197     delete m_contextMenu;
 198 }
 199
 200 /// Member initialisation
 201 void wxRichTextCtrl::Init()
 202 {
 203     m_freezeCount = 0;
 204     m_contextMenu = NULL;
 205     m_caret = NULL;
 206     m_caretPosition = -1;
 207     m_selectionRange.SetRange(-2, -2);
 208     m_selectionAnchor = -2;
 209     m_editable = true;
 210     m_caretAtLineStart = false;
 211     m_dragging = false;
 212     m_fullLayoutRequired = false;
 213     m_fullLayoutTime = 0;
 214     m_fullLayoutSavedPosition = 0;
 215     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 216     m_caretPositionForDefaultStyle = -2;
 217 }
 218
 219 /// Call Freeze to prevent refresh
 220 void wxRichTextCtrl::Freeze()
 221 {
 222     m_freezeCount ++;
 223 }
 224
 225 /// Call Thaw to refresh
 226 void wxRichTextCtrl::Thaw()
 227 {
 228     m_freezeCount --;
 229
 230     if (m_freezeCount == 0)
 231     {
 232         SetupScrollbars();
 233         Refresh(false);
 234     }
 235 }
 236
 237 /// Clear all text
 238 void wxRichTextCtrl::Clear()
 239 {
 240     m_buffer.ResetAndClearCommands();
 241     m_buffer.SetDirty(true);
 242     m_caretPosition = -1;
 243     m_caretPositionForDefaultStyle = -2;
 244     m_caretAtLineStart = false;
 245     m_selectionRange.SetRange(-2, -2);
 246
 247     SetScrollbars(0, 0, 0, 0, 0, 0);
 248
 249     if (m_freezeCount == 0)
 250     {
 251         SetupScrollbars();
 252         Refresh(false);
 253     }
 254     SendTextUpdatedEvent();
 255 }
 256
 257 /// Painting
 258 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 259 {
 260     if (GetCaret() && GetCaret()->IsVisible())
 261         GetCaret()->Hide();
 262
 263     {
 264 #if wxRICHTEXT_BUFFERED_PAINTING
 265         wxBufferedPaintDC dc(this, m_bufferBitmap);
 266 #else
 267         wxPaintDC dc(this);
 268 #endif
 269         PrepareDC(dc);
 270
 271         if (m_freezeCount > 0)
 272             return;
 273
 274         dc.SetFont(GetFont());
 275
 276         // Paint the background
 277         PaintBackground(dc);
 278
 279         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 280
 281         wxRect drawingArea(GetUpdateRegion().GetBox());
 282         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 283
 284         wxRect availableSpace(GetClientSize());
 285         if (GetBuffer().GetDirty())
 286         {
 287             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 288             GetBuffer().SetDirty(false);
 289             SetupScrollbars();
 290         }
 291
 292         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 293     }
 294
 295     if (GetCaret() && !GetCaret()->IsVisible())
 296         GetCaret()->Show();
 297
 298     PositionCaret();
 299 }
 300
 301 // Empty implementation, to prevent flicker
 302 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 303 {
 304 }
 305
 306 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 307 {
 308     if (GetCaret())
 309     {
 310         if (!GetCaret()->IsVisible())
 311             GetCaret()->Show();
 312         PositionCaret();
 313     }
 314
 315     // if (!IsFrozen())
 316     //    Refresh(false);
 317 }
 318
 319 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 320 {
 321     if (GetCaret() && GetCaret()->IsVisible())
 322         GetCaret()->Hide();
 323
 324     // if (!IsFrozen())
 325     //    Refresh(false);
 326 }
 327
 328 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 329 {
 330     m_dragging = false;
 331 }
 332
 333 /// Left-click
 334 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 335 {
 336     SetFocus();
 337
 338     wxClientDC dc(this);
 339     PrepareDC(dc);
 340     dc.SetFont(GetFont());
 341
 342     long position = 0;
 343     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 344
 345     if (hit != wxRICHTEXT_HITTEST_NONE)
 346     {
 347         m_dragStart = event.GetLogicalPosition(dc);
 348         m_dragging = true;
 349         CaptureMouse();
 350
 351         SelectNone();
 352
 353         bool caretAtLineStart = false;
 354
 355         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 356         {
 357             // If we're at the start of a line (but not first in para)
 358             // then we should keep the caret showing at the start of the line
 359             // by showing the m_caretAtLineStart flag.
 360             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 361             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 362
 363             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 364                 caretAtLineStart = true;
 365             position --;
 366         }
 367
 368         MoveCaret(position, caretAtLineStart);
 369         SetDefaultStyleToCursorStyle();
 370     }
 371
 372     event.Skip();
 373 }
 374
 375 /// Left-up
 376 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 377 {
 378     if (m_dragging)
 379     {
 380         m_dragging = false;
 381         if (GetCapture() == this)
 382             ReleaseMouse();
 383
 384         // See if we clicked on a URL
 385         wxClientDC dc(this);
 386         PrepareDC(dc);
 387         dc.SetFont(GetFont());
 388
 389         long position = 0;
 390         wxPoint logicalPt = event.GetLogicalPosition(dc);
 391         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 392
 393         if (hit != wxRICHTEXT_HITTEST_NONE)
 394         {
 395             wxRichTextEvent cmdEvent(
 396                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 397                 GetId());
 398             cmdEvent.SetEventObject(this);
 399             cmdEvent.SetPosition(m_caretPosition+1);
 400
 401             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 402             {
 403                 wxTextAttrEx attr;
 404                 if (GetStyle(position, attr))
 405                 {
 406                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 407                     {
 408                         wxString urlTarget = attr.GetURL();
 409                         if (!urlTarget.IsEmpty())
 410                         {
 411                             wxMouseEvent mouseEvent(event);
 412
 413                             long startPos = 0, endPos = 0;
 414                             wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 415                             if (obj)
 416                             {
 417                                 startPos = obj->GetRange().GetStart();
 418                                 endPos = obj->GetRange().GetEnd();
 419                             }
 420
 421                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 422                             InitCommandEvent(urlEvent);
 423
 424                             urlEvent.SetString(urlTarget);
 425
 426                             GetEventHandler()->ProcessEvent(urlEvent);
 427                         }
 428                     }
 429                 }
 430             }
 431         }
 432     }
 433 }
 434
 435 /// Left-click
 436 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 437 {
 438     wxClientDC dc(this);
 439     PrepareDC(dc);
 440     dc.SetFont(GetFont());
 441
 442     long position = 0;
 443     wxPoint logicalPt = event.GetLogicalPosition(dc);
 444     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 445
 446     // See if we need to change the cursor
 447
 448     {
 449         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 450         {
 451             wxTextAttrEx attr;
 452             if (GetStyle(position, attr))
 453             {
 454                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 455                 {
 456                     SetCursor(m_urlCursor);
 457                 }
 458                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 459                 {
 460                     SetCursor(m_textCursor);
 461                 }
 462             }
 463         }
 464         else
 465             SetCursor(m_textCursor);
 466     }
 467
 468     if (!event.Dragging())
 469     {
 470         event.Skip();
 471         return;
 472     }
 473
 474     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 475     {
 476         // TODO: test closeness
 477
 478         bool caretAtLineStart = false;
 479
 480         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 481         {
 482             // If we're at the start of a line (but not first in para)
 483             // then we should keep the caret showing at the start of the line
 484             // by showing the m_caretAtLineStart flag.
 485             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 486             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 487
 488             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 489                 caretAtLineStart = true;
 490             position --;
 491         }
 492
 493         if (m_caretPosition != position)
 494         {
 495             bool extendSel = ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 496
 497             MoveCaret(position, caretAtLineStart);
 498             SetDefaultStyleToCursorStyle();
 499
 500             if (extendSel)
 501                 Refresh(false);
 502         }
 503     }
 504 }
 505
 506 /// Right-click
 507 void wxRichTextCtrl::OnRightClick(wxMouseEvent& WXUNUSED(event))
 508 {
 509     SetFocus();
 510
 511     wxRichTextEvent cmdEvent(
 512         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 513         GetId());
 514     cmdEvent.SetEventObject(this);
 515     cmdEvent.SetPosition(m_caretPosition+1);
 516
 517     GetEventHandler()->ProcessEvent(cmdEvent);
 518 }
 519
 520 /// Left-double-click
 521 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 522 {
 523     wxRichTextEvent cmdEvent(
 524         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
 525         GetId());
 526     cmdEvent.SetEventObject(this);
 527     cmdEvent.SetPosition(m_caretPosition+1);
 528
 529     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 530     {
 531         SelectWord(GetCaretPosition()+1);
 532     }
 533 }
 534
 535 /// Middle-click
 536 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 537 {
 538     wxRichTextEvent cmdEvent(
 539         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
 540         GetId());
 541     cmdEvent.SetEventObject(this);
 542     cmdEvent.SetPosition(m_caretPosition+1);
 543
 544     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 545         event.Skip();
 546 }
 547
 548 /// Key press
 549 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 550 {
 551     int flags = 0;
 552     if (event.CmdDown())
 553         flags |= wxRICHTEXT_CTRL_DOWN;
 554     if (event.ShiftDown())
 555         flags |= wxRICHTEXT_SHIFT_DOWN;
 556     if (event.AltDown())
 557         flags |= wxRICHTEXT_ALT_DOWN;
 558
 559     if (event.GetKeyCode() == WXK_LEFT ||
 560         event.GetKeyCode() == WXK_RIGHT ||
 561         event.GetKeyCode() == WXK_UP ||
 562         event.GetKeyCode() == WXK_DOWN ||
 563         event.GetKeyCode() == WXK_HOME ||
 564         event.GetKeyCode() == WXK_PAGEUP ||
 565         event.GetKeyCode() == WXK_PAGEDOWN ||
 566         event.GetKeyCode() == WXK_END ||
 567
 568         event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 569         event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 570         event.GetKeyCode() == WXK_NUMPAD_UP ||
 571         event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 572         event.GetKeyCode() == WXK_NUMPAD_HOME ||
 573         event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 574         event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 575         event.GetKeyCode() == WXK_NUMPAD_END)
 576     {
 577         KeyboardNavigate(event.GetKeyCode(), flags);
 578         return;
 579     }
 580
 581     // all the other keys modify the controls contents which shouldn't be
 582     // possible if we're read-only
 583     if ( !IsEditable() )
 584     {
 585         event.Skip();
 586         return;
 587     }
 588
 589     if (event.GetKeyCode() == WXK_RETURN)
 590     {
 591         BeginBatchUndo(_("Insert Text"));
 592
 593         long newPos = m_caretPosition;
 594
 595         DeleteSelectedContent(& newPos);
 596
 597         if (event.ShiftDown())
 598         {
 599             wxString text;
 600             text = wxRichTextLineBreakChar;
 601             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 602         }
 603         else
 604             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
 605
 606         EndBatchUndo();
 607         SetDefaultStyleToCursorStyle();
 608
 609         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 610
 611         wxRichTextEvent cmdEvent(
 612             wxEVT_COMMAND_RICHTEXT_RETURN,
 613             GetId());
 614         cmdEvent.SetEventObject(this);
 615         cmdEvent.SetFlags(flags);
 616         cmdEvent.SetPosition(newPos+1);
 617
 618         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 619         {
 620             // Generate conventional event
 621             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 622             InitCommandEvent(textEvent);
 623
 624             GetEventHandler()->ProcessEvent(textEvent);
 625         }
 626         Update();
 627     }
 628     else if (event.GetKeyCode() == WXK_BACK)
 629     {
 630         BeginBatchUndo(_("Delete Text"));
 631
 632         // Submit range in character positions, which are greater than caret positions,
 633         // so subtract 1 for deleted character and add 1 for conversion to character position.
 634         if (m_caretPosition > -1 && !HasSelection())
 635         {
 636             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition, m_caretPosition), this);
 637         }
 638         else
 639             DeleteSelectedContent();
 640
 641         EndBatchUndo();
 642
 643         if (GetLastPosition() == -1)
 644         {
 645             GetBuffer().Reset();
 646
 647             m_caretPosition = -1;
 648             PositionCaret();
 649             SetDefaultStyleToCursorStyle();
 650         }
 651
 652         ScrollIntoView(m_caretPosition, WXK_LEFT);
 653
 654         wxRichTextEvent cmdEvent(
 655             wxEVT_COMMAND_RICHTEXT_DELETE,
 656             GetId());
 657         cmdEvent.SetEventObject(this);
 658         cmdEvent.SetFlags(flags);
 659         cmdEvent.SetPosition(m_caretPosition+1);
 660         GetEventHandler()->ProcessEvent(cmdEvent);
 661
 662         Update();
 663     }
 664     else if (event.GetKeyCode() == WXK_DELETE)
 665     {
 666         BeginBatchUndo(_("Delete Text"));
 667
 668         // Submit range in character positions, which are greater than caret positions,
 669         if (m_caretPosition < GetBuffer().GetRange().GetEnd()+1 && !HasSelection())
 670         {
 671             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition+1, m_caretPosition+1), this);
 672         }
 673         else
 674             DeleteSelectedContent();
 675
 676         EndBatchUndo();
 677
 678         if (GetLastPosition() == -1)
 679         {
 680             GetBuffer().Reset();
 681
 682             m_caretPosition = -1;
 683             PositionCaret();
 684             SetDefaultStyleToCursorStyle();
 685         }
 686
 687         wxRichTextEvent cmdEvent(
 688             wxEVT_COMMAND_RICHTEXT_DELETE,
 689             GetId());
 690         cmdEvent.SetEventObject(this);
 691         cmdEvent.SetFlags(flags);
 692         cmdEvent.SetPosition(m_caretPosition+1);
 693         GetEventHandler()->ProcessEvent(cmdEvent);
 694
 695         Update();
 696     }
 697     else
 698     {
 699         long keycode = event.GetKeyCode();
 700         switch ( keycode )
 701         {
 702             case WXK_ESCAPE:
 703             case WXK_DELETE:
 704             case WXK_START:
 705             case WXK_LBUTTON:
 706             case WXK_RBUTTON:
 707             case WXK_CANCEL:
 708             case WXK_MBUTTON:
 709             case WXK_CLEAR:
 710             case WXK_SHIFT:
 711             case WXK_ALT:
 712             case WXK_CONTROL:
 713             case WXK_MENU:
 714             case WXK_PAUSE:
 715             case WXK_CAPITAL:
 716             case WXK_END:
 717             case WXK_HOME:
 718             case WXK_LEFT:
 719             case WXK_UP:
 720             case WXK_RIGHT:
 721             case WXK_DOWN:
 722             case WXK_SELECT:
 723             case WXK_PRINT:
 724             case WXK_EXECUTE:
 725             case WXK_SNAPSHOT:
 726             case WXK_INSERT:
 727             case WXK_HELP:
 728             case WXK_NUMPAD0:
 729             case WXK_NUMPAD1:
 730             case WXK_NUMPAD2:
 731             case WXK_NUMPAD3:
 732             case WXK_NUMPAD4:
 733             case WXK_NUMPAD5:
 734             case WXK_NUMPAD6:
 735             case WXK_NUMPAD7:
 736             case WXK_NUMPAD8:
 737             case WXK_NUMPAD9:
 738             case WXK_MULTIPLY:
 739             case WXK_ADD:
 740             case WXK_SEPARATOR:
 741             case WXK_SUBTRACT:
 742             case WXK_DECIMAL:
 743             case WXK_DIVIDE:
 744             case WXK_F1:
 745             case WXK_F2:
 746             case WXK_F3:
 747             case WXK_F4:
 748             case WXK_F5:
 749             case WXK_F6:
 750             case WXK_F7:
 751             case WXK_F8:
 752             case WXK_F9:
 753             case WXK_F10:
 754             case WXK_F11:
 755             case WXK_F12:
 756             case WXK_F13:
 757             case WXK_F14:
 758             case WXK_F15:
 759             case WXK_F16:
 760             case WXK_F17:
 761             case WXK_F18:
 762             case WXK_F19:
 763             case WXK_F20:
 764             case WXK_F21:
 765             case WXK_F22:
 766             case WXK_F23:
 767             case WXK_F24:
 768             case WXK_NUMLOCK:
 769             case WXK_SCROLL:
 770             case WXK_PAGEUP:
 771             case WXK_PAGEDOWN:
 772             case WXK_NUMPAD_SPACE:
 773             case WXK_NUMPAD_TAB:
 774             case WXK_NUMPAD_ENTER:
 775             case WXK_NUMPAD_F1:
 776             case WXK_NUMPAD_F2:
 777             case WXK_NUMPAD_F3:
 778             case WXK_NUMPAD_F4:
 779             case WXK_NUMPAD_HOME:
 780             case WXK_NUMPAD_LEFT:
 781             case WXK_NUMPAD_UP:
 782             case WXK_NUMPAD_RIGHT:
 783             case WXK_NUMPAD_DOWN:
 784             case WXK_NUMPAD_PAGEUP:
 785             case WXK_NUMPAD_PAGEDOWN:
 786             case WXK_NUMPAD_END:
 787             case WXK_NUMPAD_BEGIN:
 788             case WXK_NUMPAD_INSERT:
 789             case WXK_NUMPAD_DELETE:
 790             case WXK_NUMPAD_EQUAL:
 791             case WXK_NUMPAD_MULTIPLY:
 792             case WXK_NUMPAD_ADD:
 793             case WXK_NUMPAD_SEPARATOR:
 794             case WXK_NUMPAD_SUBTRACT:
 795             case WXK_NUMPAD_DECIMAL:
 796             case WXK_WINDOWS_LEFT:
 797             {
 798                 event.Skip();
 799                 return;
 800             }
 801
 802             default:
 803             {
 804                 if (event.CmdDown() || event.AltDown())
 805                 {
 806                     event.Skip();
 807                     return;
 808                 }
 809
 810                 wxRichTextEvent cmdEvent(
 811                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
 812                     GetId());
 813                 cmdEvent.SetEventObject(this);
 814                 cmdEvent.SetFlags(flags);
 815 #if wxUSE_UNICODE
 816                 cmdEvent.SetCharacter(event.GetUnicodeKey());
 817 #else
 818                 cmdEvent.SetCharacter((wxChar) keycode);
 819 #endif
 820                 cmdEvent.SetPosition(m_caretPosition+1);
 821
 822                 if (keycode == wxT('\t'))
 823                 {
 824                     // See if we need to promote or demote the selection or paragraph at the cursor
 825                     // position, instead of inserting a tab.
 826                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
 827                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
 828                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
 829                     {
 830                         wxRichTextRange range;
 831                         if (HasSelection())
 832                             range = GetSelectionRange();
 833                         else
 834                             range = para->GetRange().FromInternal();
 835
 836                         int promoteBy = event.ShiftDown() ? 1 : -1;
 837
 838                         PromoteList(promoteBy, range, NULL);
 839
 840                         GetEventHandler()->ProcessEvent(cmdEvent);
 841
 842                         return;
 843                     }
 844                 }
 845
 846                 BeginBatchUndo(_("Insert Text"));
 847
 848                 long newPos = m_caretPosition;
 849                 DeleteSelectedContent(& newPos);
 850
 851 #if wxUSE_UNICODE
 852                 wxString str = event.GetUnicodeKey();
 853 #else
 854                 wxString str = (wxChar) event.GetKeyCode();
 855 #endif
 856                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
 857
 858                 EndBatchUndo();
 859
 860                 SetDefaultStyleToCursorStyle();
 861                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
 862
 863                 GetEventHandler()->ProcessEvent(cmdEvent);
 864
 865                 Update();
 866             }
 867         }
 868     }
 869 }
 870
 871 /// Delete content if there is a selection, e.g. when pressing a key.
 872 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
 873 {
 874     if (HasSelection())
 875     {
 876         long pos = m_selectionRange.GetStart();
 877         GetBuffer().DeleteRangeWithUndo(m_selectionRange, this);
 878         m_selectionRange.SetRange(-2, -2);
 879
 880         if (newPos)
 881             *newPos = pos-1;
 882         return true;
 883     }
 884     else
 885         return false;
 886 }
 887
 888 /// Keyboard navigation
 889
 890 /*
 891
 892 Left:       left one character
 893 Right:      right one character
 894 Up:         up one line
 895 Down:       down one line
 896 Ctrl-Left:  left one word
 897 Ctrl-Right: right one word
 898 Ctrl-Up:    previous paragraph start
 899 Ctrl-Down:  next start of paragraph
 900 Home:       start of line
 901 End:        end of line
 902 Ctrl-Home:  start of document
 903 Ctrl-End:   end of document
 904 Page-Up:    Up a screen
 905 Page-Down:  Down a screen
 906
 907 Maybe:
 908
 909 Ctrl-Alt-PgUp: Start of window
 910 Ctrl-Alt-PgDn: End of window
 911 F8:         Start selection mode
 912 Esc:        End selection mode
 913
 914 Adding Shift does the above but starts/extends selection.
 915
 916
 917  */
 918
 919 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
 920 {
 921     bool success = false;
 922
 923     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
 924     {
 925         if (flags & wxRICHTEXT_CTRL_DOWN)
 926             success = WordRight(1, flags);
 927         else
 928             success = MoveRight(1, flags);
 929     }
 930     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
 931     {
 932         if (flags & wxRICHTEXT_CTRL_DOWN)
 933             success = WordLeft(1, flags);
 934         else
 935             success = MoveLeft(1, flags);
 936     }
 937     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
 938     {
 939         if (flags & wxRICHTEXT_CTRL_DOWN)
 940             success = MoveToParagraphStart(flags);
 941         else
 942             success = MoveUp(1, flags);
 943     }
 944     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
 945     {
 946         if (flags & wxRICHTEXT_CTRL_DOWN)
 947             success = MoveToParagraphEnd(flags);
 948         else
 949             success = MoveDown(1, flags);
 950     }
 951     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
 952     {
 953         success = PageUp(1, flags);
 954     }
 955     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
 956     {
 957         success = PageDown(1, flags);
 958     }
 959     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
 960     {
 961         if (flags & wxRICHTEXT_CTRL_DOWN)
 962             success = MoveHome(flags);
 963         else
 964             success = MoveToLineStart(flags);
 965     }
 966     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
 967     {
 968         if (flags & wxRICHTEXT_CTRL_DOWN)
 969             success = MoveEnd(flags);
 970         else
 971             success = MoveToLineEnd(flags);
 972     }
 973
 974     if (success)
 975     {
 976         ScrollIntoView(m_caretPosition, keyCode);
 977         SetDefaultStyleToCursorStyle();
 978     }
 979
 980     return success;
 981 }
 982
 983 /// Extend the selection. Selections are in caret positions.
 984 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
 985 {
 986     if (flags & wxRICHTEXT_SHIFT_DOWN)
 987     {
 988         // If not currently selecting, start selecting
 989         if (m_selectionRange.GetStart() == -2)
 990         {
 991             m_selectionAnchor = oldPos;
 992
 993             if (oldPos > newPos)
 994                 m_selectionRange.SetRange(newPos+1, oldPos);
 995             else
 996                 m_selectionRange.SetRange(oldPos+1, newPos);
 997         }
 998         else
 999         {
1000             // Always ensure that the selection range start is greater than
1001             // the end.
1002             if (newPos > m_selectionAnchor)
1003                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
1004             else
1005                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
1006         }
1007
1008         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
1009         {
1010             wxLogDebug(wxT("Strange selection range"));
1011         }
1012
1013         return true;
1014     }
1015     else
1016         return false;
1017 }
1018
1019 /// Scroll into view, returning true if we scrolled.
1020 /// This takes a _caret_ position.
1021 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1022 {
1023     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1024
1025     if (!line)
1026         return false;
1027
1028     int ppuX, ppuY;
1029     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1030
1031     int startXUnits, startYUnits;
1032     GetViewStart(& startXUnits, & startYUnits);
1033     int startY = startYUnits * ppuY;
1034
1035     int sx = 0, sy = 0;
1036     GetVirtualSize(& sx, & sy);
1037     int sxUnits = 0;
1038     int syUnits = 0;
1039     if (ppuY != 0)
1040         syUnits = sy/ppuY;
1041
1042     wxRect rect = line->GetRect();
1043
1044     bool scrolled = false;
1045
1046     wxSize clientSize = GetClientSize();
1047
1048     // Going down
1049     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1050         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1051         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1052         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1053     {
1054         if ((rect.y + rect.height) > (clientSize.y + startY))
1055         {
1056             // Make it scroll so this item is at the bottom
1057             // of the window
1058             int y = rect.y - (clientSize.y - rect.height);
1059             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1060
1061             // If we're still off the screen, scroll another line down
1062             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1063                 yUnits ++;
1064
1065             if (startYUnits != yUnits)
1066             {
1067                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1068                 scrolled = true;
1069             }
1070         }
1071         else if (rect.y < startY)
1072         {
1073             // Make it scroll so this item is at the top
1074             // of the window
1075             int y = rect.y ;
1076             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1077
1078             if (startYUnits != yUnits)
1079             {
1080                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1081                 scrolled = true;
1082             }
1083         }
1084     }
1085     // Going up
1086     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1087              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1088              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1089              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1090     {
1091         if (rect.y < startY)
1092         {
1093             // Make it scroll so this item is at the top
1094             // of the window
1095             int y = rect.y ;
1096             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1097
1098             if (startYUnits != yUnits)
1099             {
1100                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1101                 scrolled = true;
1102             }
1103         }
1104         else if ((rect.y + rect.height) > (clientSize.y + startY))
1105         {
1106             // Make it scroll so this item is at the bottom
1107             // of the window
1108             int y = rect.y - (clientSize.y - rect.height);
1109             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1110
1111             // If we're still off the screen, scroll another line down
1112             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1113                 yUnits ++;
1114
1115             if (startYUnits != yUnits)
1116             {
1117                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1118                 scrolled = true;
1119             }
1120         }
1121     }
1122     PositionCaret();
1123
1124     return scrolled;
1125 }
1126
1127 /// Is the given position visible on the screen?
1128 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1129 {
1130     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1131
1132     if (!line)
1133         return false;
1134
1135     int ppuX, ppuY;
1136     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1137
1138     int startX, startY;
1139     GetViewStart(& startX, & startY);
1140     startX = 0;
1141     startY = startY * ppuY;
1142
1143     int sx = 0, sy = 0;
1144     GetVirtualSize(& sx, & sy);
1145     sx = 0;
1146     if (ppuY != 0)
1147         sy = sy/ppuY;
1148
1149     wxRect rect = line->GetRect();
1150
1151     wxSize clientSize = GetClientSize();
1152
1153     return !(((rect.y + rect.height) > (clientSize.y + startY)) || rect.y < startY);
1154 }
1155
1156 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1157 {
1158     m_caretPosition = position;
1159     m_caretAtLineStart = showAtLineStart;
1160 }
1161
1162 /// Move caret one visual step forward: this may mean setting a flag
1163 /// and keeping the same position if we're going from the end of one line
1164 /// to the start of the next, which may be the exact same caret position.
1165 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1166 {
1167     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1168
1169     // Only do the check if we're not at the end of the paragraph (where things work OK
1170     // anyway)
1171     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1172     {
1173         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1174
1175         if (line)
1176         {
1177             wxRichTextRange lineRange = line->GetAbsoluteRange();
1178
1179             // We're at the end of a line. See whether we need to
1180             // stay at the same actual caret position but change visual
1181             // position, or not.
1182             if (oldPosition == lineRange.GetEnd())
1183             {
1184                 if (m_caretAtLineStart)
1185                 {
1186                     // We're already at the start of the line, so actually move on now.
1187                     m_caretPosition = oldPosition + 1;
1188                     m_caretAtLineStart = false;
1189                 }
1190                 else
1191                 {
1192                     // We're showing at the end of the line, so keep to
1193                     // the same position but indicate that we're to show
1194                     // at the start of the next line.
1195                     m_caretPosition = oldPosition;
1196                     m_caretAtLineStart = true;
1197                 }
1198                 SetDefaultStyleToCursorStyle();
1199                 return;
1200             }
1201         }
1202     }
1203     m_caretPosition ++;
1204     SetDefaultStyleToCursorStyle();
1205 }
1206
1207 /// Move caret one visual step backward: this may mean setting a flag
1208 /// and keeping the same position if we're going from the end of one line
1209 /// to the start of the next, which may be the exact same caret position.
1210 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1211 {
1212     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1213
1214     // Only do the check if we're not at the start of the paragraph (where things work OK
1215     // anyway)
1216     if (para && (oldPosition != para->GetRange().GetStart()))
1217     {
1218         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1219
1220         if (line)
1221         {
1222             wxRichTextRange lineRange = line->GetAbsoluteRange();
1223
1224             // We're at the start of a line. See whether we need to
1225             // stay at the same actual caret position but change visual
1226             // position, or not.
1227             if (oldPosition == lineRange.GetStart())
1228             {
1229                 m_caretPosition = oldPosition-1;
1230                 m_caretAtLineStart = true;
1231                 return;
1232             }
1233             else if (oldPosition == lineRange.GetEnd())
1234             {
1235                 if (m_caretAtLineStart)
1236                 {
1237                     // We're at the start of the line, so keep the same caret position
1238                     // but clear the start-of-line flag.
1239                     m_caretPosition = oldPosition;
1240                     m_caretAtLineStart = false;
1241                 }
1242                 else
1243                 {
1244                     // We're showing at the end of the line, so go back
1245                     // to the previous character position.
1246                     m_caretPosition = oldPosition - 1;
1247                 }
1248                 SetDefaultStyleToCursorStyle();
1249                 return;
1250             }
1251         }
1252     }
1253     m_caretPosition --;
1254     SetDefaultStyleToCursorStyle();
1255 }
1256
1257 /// Move right
1258 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1259 {
1260     long endPos = GetBuffer().GetRange().GetEnd();
1261
1262     if (m_caretPosition + noPositions < endPos)
1263     {
1264         long oldPos = m_caretPosition;
1265         long newPos = m_caretPosition + noPositions;
1266
1267         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1268         if (!extendSel)
1269             SelectNone();
1270
1271         // Determine by looking at oldPos and m_caretPosition whether
1272         // we moved from the end of a line to the start of the next line, in which case
1273         // we want to adjust the caret position such that it is positioned at the
1274         // start of the next line, rather than jumping past the first character of the
1275         // line.
1276         if (noPositions == 1 && !extendSel)
1277             MoveCaretForward(oldPos);
1278         else
1279             SetCaretPosition(newPos);
1280
1281         PositionCaret();
1282         SetDefaultStyleToCursorStyle();
1283
1284         if (extendSel)
1285             Refresh(false);
1286         return true;
1287     }
1288     else
1289         return false;
1290 }
1291
1292 /// Move left
1293 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1294 {
1295     long startPos = -1;
1296
1297     if (m_caretPosition > startPos - noPositions + 1)
1298     {
1299         long oldPos = m_caretPosition;
1300         long newPos = m_caretPosition - noPositions;
1301         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1302         if (!extendSel)
1303             SelectNone();
1304
1305         if (noPositions == 1 && !extendSel)
1306             MoveCaretBack(oldPos);
1307         else
1308             SetCaretPosition(newPos);
1309
1310         PositionCaret();
1311         SetDefaultStyleToCursorStyle();
1312
1313         if (extendSel)
1314             Refresh(false);
1315         return true;
1316     }
1317     else
1318         return false;
1319 }
1320
1321 /// Move up
1322 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1323 {
1324     return MoveDown(- noLines, flags);
1325 }
1326
1327 /// Move up
1328 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1329 {
1330     if (!GetCaret())
1331         return false;
1332
1333     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1334     wxPoint pt = GetCaret()->GetPosition();
1335     long newLine = lineNumber + noLines;
1336
1337     if (lineNumber != -1)
1338     {
1339         if (noLines > 0)
1340         {
1341             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1342
1343             if (newLine > lastLine)
1344                 return false;
1345         }
1346         else
1347         {
1348             if (newLine < 0)
1349                 return false;
1350         }
1351     }
1352
1353     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1354     if (lineObj)
1355     {
1356         pt.y = lineObj->GetAbsolutePosition().y + 2;
1357     }
1358     else
1359         return false;
1360
1361     long newPos = 0;
1362     wxClientDC dc(this);
1363     PrepareDC(dc);
1364     dc.SetFont(GetFont());
1365
1366     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1367
1368     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1369     {
1370         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1371         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1372         // so we view the caret at the start of the line.
1373         bool caretLineStart = false;
1374         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1375         {
1376             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1377             wxRichTextRange lineRange;
1378             if (thisLine)
1379                 lineRange = thisLine->GetAbsoluteRange();
1380
1381             if (thisLine && (newPos-1) == lineRange.GetEnd())
1382             {
1383                 newPos --;
1384                 caretLineStart = true;
1385             }
1386             else
1387             {
1388                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1389                 if (para && para->GetRange().GetStart() == newPos)
1390                     newPos --;
1391             }
1392         }
1393
1394         long newSelEnd = newPos;
1395
1396         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1397         if (!extendSel)
1398             SelectNone();
1399
1400         SetCaretPosition(newPos, caretLineStart);
1401         PositionCaret();
1402         SetDefaultStyleToCursorStyle();
1403
1404         if (extendSel)
1405             Refresh(false);
1406         return true;
1407     }
1408
1409     return false;
1410 }
1411
1412 /// Move to the end of the paragraph
1413 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1414 {
1415     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1416     if (para)
1417     {
1418         long newPos = para->GetRange().GetEnd() - 1;
1419         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1420         if (!extendSel)
1421             SelectNone();
1422
1423         SetCaretPosition(newPos);
1424         PositionCaret();
1425         SetDefaultStyleToCursorStyle();
1426
1427         if (extendSel)
1428             Refresh(false);
1429         return true;
1430     }
1431
1432     return false;
1433 }
1434
1435 /// Move to the start of the paragraph
1436 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1437 {
1438     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1439     if (para)
1440     {
1441         long newPos = para->GetRange().GetStart() - 1;
1442         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1443         if (!extendSel)
1444             SelectNone();
1445
1446         SetCaretPosition(newPos);
1447         PositionCaret();
1448         SetDefaultStyleToCursorStyle();
1449
1450         if (extendSel)
1451             Refresh(false);
1452         return true;
1453     }
1454
1455     return false;
1456 }
1457
1458 /// Move to the end of the line
1459 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1460 {
1461     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1462
1463     if (line)
1464     {
1465         wxRichTextRange lineRange = line->GetAbsoluteRange();
1466         long newPos = lineRange.GetEnd();
1467         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1468         if (!extendSel)
1469             SelectNone();
1470
1471         SetCaretPosition(newPos);
1472         PositionCaret();
1473         SetDefaultStyleToCursorStyle();
1474
1475         if (extendSel)
1476             Refresh(false);
1477         return true;
1478     }
1479
1480     return false;
1481 }
1482
1483 /// Move to the start of the line
1484 bool wxRichTextCtrl::MoveToLineStart(int flags)
1485 {
1486     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1487     if (line)
1488     {
1489         wxRichTextRange lineRange = line->GetAbsoluteRange();
1490         long newPos = lineRange.GetStart()-1;
1491
1492         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1493         if (!extendSel)
1494             SelectNone();
1495
1496         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1497
1498         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1499         PositionCaret();
1500         SetDefaultStyleToCursorStyle();
1501
1502         if (extendSel)
1503             Refresh(false);
1504         return true;
1505     }
1506
1507     return false;
1508 }
1509
1510 /// Move to the start of the buffer
1511 bool wxRichTextCtrl::MoveHome(int flags)
1512 {
1513     if (m_caretPosition != -1)
1514     {
1515         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1516         if (!extendSel)
1517             SelectNone();
1518
1519         SetCaretPosition(-1);
1520         PositionCaret();
1521         SetDefaultStyleToCursorStyle();
1522
1523         if (extendSel)
1524             Refresh(false);
1525         return true;
1526     }
1527     else
1528         return false;
1529 }
1530
1531 /// Move to the end of the buffer
1532 bool wxRichTextCtrl::MoveEnd(int flags)
1533 {
1534     long endPos = GetBuffer().GetRange().GetEnd()-1;
1535
1536     if (m_caretPosition != endPos)
1537     {
1538         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1539         if (!extendSel)
1540             SelectNone();
1541
1542         SetCaretPosition(endPos);
1543         PositionCaret();
1544         SetDefaultStyleToCursorStyle();
1545
1546         if (extendSel)
1547             Refresh(false);
1548         return true;
1549     }
1550     else
1551         return false;
1552 }
1553
1554 /// Move noPages pages up
1555 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1556 {
1557     return PageDown(- noPages, flags);
1558 }
1559
1560 /// Move noPages pages down
1561 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1562 {
1563     // Calculate which line occurs noPages * screen height further down.
1564     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1565     if (line)
1566     {
1567         wxSize clientSize = GetClientSize();
1568         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1569
1570         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1571         if (newLine)
1572         {
1573             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1574             long pos = lineRange.GetStart()-1;
1575             if (pos != m_caretPosition)
1576             {
1577                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1578
1579                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1580                 if (!extendSel)
1581                     SelectNone();
1582
1583                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1584                 PositionCaret();
1585                 SetDefaultStyleToCursorStyle();
1586
1587                 if (extendSel)
1588                     Refresh(false);
1589                 return true;
1590             }
1591         }
1592     }
1593
1594     return false;
1595 }
1596
1597 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1598 {
1599     return str == wxT(" ") || str == wxT("\t");
1600 }
1601
1602 // Finds the caret position for the next word
1603 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1604 {
1605     long endPos = GetBuffer().GetRange().GetEnd();
1606
1607     if (direction > 0)
1608     {
1609         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1610
1611         // First skip current text to space
1612         while (i < endPos && i > -1)
1613         {
1614             // i is in character, not caret positions
1615             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1616             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1617             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1618             {
1619                 break;
1620             }
1621             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1622                 i += direction;
1623             else
1624             {
1625                 break;
1626             }
1627         }
1628         while (i < endPos && i > -1)
1629         {
1630             // i is in character, not caret positions
1631             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1632             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1633             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1634                 return wxMax(-1, i);
1635
1636             if (text.empty()) // End of paragraph, or maybe an image
1637                 return wxMax(-1, i - 1);
1638             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1639                 i += direction;
1640             else
1641             {
1642                 // Convert to caret position
1643                 return wxMax(-1, i - 1);
1644             }
1645         }
1646         if (i >= endPos)
1647             return endPos-1;
1648         return i-1;
1649     }
1650     else
1651     {
1652         long i = m_caretPosition;
1653
1654         // First skip white space
1655         while (i < endPos && i > -1)
1656         {
1657             // i is in character, not caret positions
1658             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1659             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1660
1661             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1662                 break;
1663             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1664                 i += direction;
1665             else
1666                 break;
1667         }
1668         // Next skip current text to space
1669         while (i < endPos && i > -1)
1670         {
1671             // i is in character, not caret positions
1672             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1673             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1674             if (line && line->GetAbsoluteRange().GetStart() == i)
1675                 return i-1;
1676
1677             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1678                 i += direction;
1679             else
1680             {
1681                 return i;
1682             }
1683         }
1684         if (i < -1)
1685             return -1;
1686         return i;
1687     }
1688 }
1689
1690 /// Move n words left
1691 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1692 {
1693     long pos = FindNextWordPosition(-1);
1694     if (pos != m_caretPosition)
1695     {
1696         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1697
1698         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1699         if (!extendSel)
1700             SelectNone();
1701
1702         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1703         PositionCaret();
1704         SetDefaultStyleToCursorStyle();
1705
1706         if (extendSel)
1707             Refresh(false);
1708         return true;
1709     }
1710
1711     return false;
1712 }
1713
1714 /// Move n words right
1715 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1716 {
1717     long pos = FindNextWordPosition(1);
1718     if (pos != m_caretPosition)
1719     {
1720         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1721
1722         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1723         if (!extendSel)
1724             SelectNone();
1725
1726         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1727         PositionCaret();
1728         SetDefaultStyleToCursorStyle();
1729
1730         if (extendSel)
1731             Refresh(false);
1732         return true;
1733     }
1734
1735     return false;
1736 }
1737
1738 /// Sizing
1739 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1740 {
1741     // Only do sizing optimization for large buffers
1742     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1743     {
1744         m_fullLayoutRequired = true;
1745         m_fullLayoutTime = wxGetLocalTimeMillis();
1746         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1747         LayoutContent(true /* onlyVisibleRect */);
1748     }
1749     else
1750         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1751
1752 #if wxRICHTEXT_BUFFERED_PAINTING
1753     RecreateBuffer();
1754 #endif
1755
1756     event.Skip();
1757 }
1758
1759
1760 /// Idle-time processing
1761 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1762 {
1763     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1764
1765     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1766     {
1767         m_fullLayoutRequired = false;
1768         m_fullLayoutTime = 0;
1769         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1770         ShowPosition(m_fullLayoutSavedPosition);
1771         Refresh(false);
1772     }
1773
1774     if (m_caretPositionForDefaultStyle != -2)
1775     {
1776         // If the caret position has changed, no longer reflect the default style
1777         // in the UI.
1778         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1779             m_caretPositionForDefaultStyle = -2;
1780     }
1781
1782     event.Skip();
1783 }
1784
1785 /// Scrolling
1786 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1787 {
1788     // Not used
1789     event.Skip();
1790 }
1791
1792 /// Set up scrollbars, e.g. after a resize
1793 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1794 {
1795     if (m_freezeCount)
1796         return;
1797
1798     if (GetBuffer().IsEmpty())
1799     {
1800         SetScrollbars(0, 0, 0, 0, 0, 0);
1801         return;
1802     }
1803
1804     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1805     // of pixels. See e.g. wxVScrolledWindow for ideas.
1806     int pixelsPerUnit = 5;
1807     wxSize clientSize = GetClientSize();
1808
1809     int maxHeight = GetBuffer().GetCachedSize().y;
1810
1811     // Round up so we have at least maxHeight pixels
1812     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1813
1814     int startX = 0, startY = 0;
1815     if (!atTop)
1816         GetViewStart(& startX, & startY);
1817
1818     int maxPositionX = 0; // wxMax(sz.x - clientSize.x, 0);
1819     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
1820
1821     // Move to previous scroll position if
1822     // possible
1823     SetScrollbars(0, pixelsPerUnit,
1824         0, unitsY,
1825         wxMin(maxPositionX, startX), wxMin(maxPositionY, startY));
1826 }
1827
1828 /// Paint the background
1829 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1830 {
1831     wxColour backgroundColour = GetBackgroundColour();
1832     if (!backgroundColour.Ok())
1833         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1834
1835     // Clear the background
1836     dc.SetBrush(wxBrush(backgroundColour));
1837     dc.SetPen(*wxTRANSPARENT_PEN);
1838     wxRect windowRect(GetClientSize());
1839     windowRect.x -= 2; windowRect.y -= 2;
1840     windowRect.width += 4; windowRect.height += 4;
1841
1842     // We need to shift the rectangle to take into account
1843     // scrolling. Converting device to logical coordinates.
1844     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1845     dc.DrawRectangle(windowRect);
1846 }
1847
1848 #if wxRICHTEXT_BUFFERED_PAINTING
1849 /// Recreate buffer bitmap if necessary
1850 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1851 {
1852     wxSize sz = size;
1853     if (sz == wxDefaultSize)
1854         sz = GetClientSize();
1855
1856     if (sz.x < 1 || sz.y < 1)
1857         return false;
1858
1859     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1860         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1861     return m_bufferBitmap.Ok();
1862 }
1863 #endif
1864
1865 // ----------------------------------------------------------------------------
1866 // file IO functions
1867 // ----------------------------------------------------------------------------
1868
1869 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
1870 {
1871     bool success = GetBuffer().LoadFile(filename, fileType);
1872     if (success)
1873         m_filename = filename;
1874
1875     DiscardEdits();
1876     SetInsertionPoint(0);
1877     LayoutContent();
1878     PositionCaret();
1879     SetupScrollbars(true);
1880     Refresh(false);
1881     SendTextUpdatedEvent();
1882
1883     if (success)
1884         return true;
1885     else
1886     {
1887         wxLogError(_("File couldn't be loaded."));
1888
1889         return false;
1890     }
1891 }
1892
1893 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
1894 {
1895     if (GetBuffer().SaveFile(filename, fileType))
1896     {
1897         m_filename = filename;
1898
1899         DiscardEdits();
1900
1901         return true;
1902     }
1903
1904     wxLogError(_("The text couldn't be saved."));
1905
1906     return false;
1907 }
1908
1909 // ----------------------------------------------------------------------------
1910 // wxRichTextCtrl specific functionality
1911 // ----------------------------------------------------------------------------
1912
1913 /// Add a new paragraph of text to the end of the buffer
1914 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
1915 {
1916     return GetBuffer().AddParagraph(text);
1917 }
1918
1919 /// Add an image
1920 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
1921 {
1922     return GetBuffer().AddImage(image);
1923 }
1924
1925 // ----------------------------------------------------------------------------
1926 // selection and ranges
1927 // ----------------------------------------------------------------------------
1928
1929 void wxRichTextCtrl::SelectAll()
1930 {
1931     SetSelection(0, GetLastPosition()+1);
1932     m_selectionAnchor = -1;
1933 }
1934
1935 /// Select none
1936 void wxRichTextCtrl::SelectNone()
1937 {
1938     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
1939         SetSelection(-2, -2);
1940     m_selectionAnchor = -2;
1941 }
1942
1943 static bool wxIsWordDelimiter(const wxString& text)
1944 {
1945     return !text.IsEmpty() && !wxIsalnum(text[0]);
1946 }
1947
1948 /// Select the word at the given character position
1949 bool wxRichTextCtrl::SelectWord(long position)
1950 {
1951     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
1952         return false;
1953
1954     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
1955     if (!para)
1956         return false;
1957
1958     long positionStart = position;
1959     long positionEnd = position;
1960
1961     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
1962     {
1963         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
1964         if (wxIsWordDelimiter(text))
1965         {
1966             positionStart ++;
1967             break;
1968         }
1969     }
1970     if (positionStart < para->GetRange().GetStart())
1971         positionStart = para->GetRange().GetStart();
1972
1973     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
1974     {
1975         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
1976         if (wxIsWordDelimiter(text))
1977         {
1978             positionEnd --;
1979             break;
1980         }
1981     }
1982     if (positionEnd >= para->GetRange().GetEnd())
1983         positionEnd = para->GetRange().GetEnd();
1984
1985     SetSelection(positionStart, positionEnd+1);
1986
1987     if (positionStart >= 0)
1988     {
1989         MoveCaret(positionStart-1, true);
1990         SetDefaultStyleToCursorStyle();
1991     }
1992
1993     return true;
1994 }
1995
1996 wxString wxRichTextCtrl::GetStringSelection() const
1997 {
1998     long from, to;
1999     GetSelection(&from, &to);
2000
2001     return GetRange(from, to);
2002 }
2003
2004 // ----------------------------------------------------------------------------
2005 // hit testing
2006 // ----------------------------------------------------------------------------
2007
2008 wxTextCtrlHitTestResult
2009 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2010 {
2011     // implement in terms of the other overload as the native ports typically
2012     // can get the position and not (x, y) pair directly (although wxUniv
2013     // directly gets x and y -- and so overrides this method as well)
2014     long pos;
2015     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2016
2017     if ( rc != wxTE_HT_UNKNOWN )
2018     {
2019         PositionToXY(pos, x, y);
2020     }
2021
2022     return rc;
2023 }
2024
2025 wxTextCtrlHitTestResult
2026 wxRichTextCtrl::HitTest(const wxPoint& pt,
2027                         long * pos) const
2028 {
2029     wxClientDC dc((wxRichTextCtrl*) this);
2030     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2031
2032     // Buffer uses logical position (relative to start of buffer)
2033     // so convert
2034     wxPoint pt2 = GetLogicalPoint(pt);
2035
2036     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
2037
2038     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2039         return wxTE_HT_BEFORE;
2040     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2041         return wxTE_HT_BEYOND;
2042     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2043         return wxTE_HT_ON_TEXT;
2044
2045     return wxTE_HT_UNKNOWN;
2046 }
2047
2048 // ----------------------------------------------------------------------------
2049 // set/get the controls text
2050 // ----------------------------------------------------------------------------
2051
2052 wxString wxRichTextCtrl::GetValue() const
2053 {
2054     return GetBuffer().GetText();
2055 }
2056
2057 wxString wxRichTextCtrl::GetRange(long from, long to) const
2058 {
2059     // Public API for range is different from internals
2060     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2061 }
2062
2063 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2064 {
2065     Clear();
2066
2067     if (!value.IsEmpty())
2068     {
2069         // Remove empty paragraph
2070         GetBuffer().Clear();
2071         DoWriteText(value);
2072
2073         // for compatibility, don't move the cursor when doing SetValue()
2074         SetInsertionPoint(0);
2075     }
2076     else
2077     {
2078         // still send an event for consistency
2079         if (flags & SetValue_SendEvent)
2080             SendTextUpdatedEvent();
2081     }
2082     DiscardEdits();
2083 }
2084
2085 void wxRichTextCtrl::WriteText(const wxString& value)
2086 {
2087     DoWriteText(value);
2088 }
2089
2090 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2091 {
2092     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2093
2094     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2095
2096     if ( flags & SetValue_SendEvent )
2097         SendTextUpdatedEvent();
2098 }
2099
2100 void wxRichTextCtrl::AppendText(const wxString& text)
2101 {
2102     SetInsertionPointEnd();
2103
2104     WriteText(text);
2105 }
2106
2107 /// Write an image at the current insertion point
2108 bool wxRichTextCtrl::WriteImage(const wxImage& image, int bitmapType)
2109 {
2110     wxRichTextImageBlock imageBlock;
2111
2112     wxImage image2 = image;
2113     if (imageBlock.MakeImageBlock(image2, bitmapType))
2114         return WriteImage(imageBlock);
2115
2116     return false;
2117 }
2118
2119 bool wxRichTextCtrl::WriteImage(const wxString& filename, int bitmapType)
2120 {
2121     wxRichTextImageBlock imageBlock;
2122
2123     wxImage image;
2124     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2125         return WriteImage(imageBlock);
2126
2127     return false;
2128 }
2129
2130 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2131 {
2132     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2133 }
2134
2135 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, int bitmapType)
2136 {
2137     if (bitmap.Ok())
2138     {
2139         wxRichTextImageBlock imageBlock;
2140
2141         wxImage image = bitmap.ConvertToImage();
2142         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2143             return WriteImage(imageBlock);
2144     }
2145
2146     return false;
2147 }
2148
2149 /// Insert a newline (actually paragraph) at the current insertion point.
2150 bool wxRichTextCtrl::Newline()
2151 {
2152     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
2153 }
2154
2155 /// Insert a line break at the current insertion point.
2156 bool wxRichTextCtrl::LineBreak()
2157 {
2158     wxString text;
2159     text = wxRichTextLineBreakChar;
2160     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2161 }
2162
2163 // ----------------------------------------------------------------------------
2164 // Clipboard operations
2165 // ----------------------------------------------------------------------------
2166
2167 void wxRichTextCtrl::Copy()
2168 {
2169     if (CanCopy())
2170     {
2171         wxRichTextRange range = GetInternalSelectionRange();
2172         GetBuffer().CopyToClipboard(range);
2173     }
2174 }
2175
2176 void wxRichTextCtrl::Cut()
2177 {
2178     if (CanCut())
2179     {
2180         wxRichTextRange range = GetInternalSelectionRange();
2181         GetBuffer().CopyToClipboard(range);
2182
2183         DeleteSelectedContent();
2184         LayoutContent();
2185         Refresh(false);
2186     }
2187 }
2188
2189 void wxRichTextCtrl::Paste()
2190 {
2191     if (CanPaste())
2192     {
2193         BeginBatchUndo(_("Paste"));
2194
2195         long newPos = m_caretPosition;
2196         DeleteSelectedContent(& newPos);
2197
2198         GetBuffer().PasteFromClipboard(newPos);
2199
2200         EndBatchUndo();
2201     }
2202 }
2203
2204 void wxRichTextCtrl::DeleteSelection()
2205 {
2206     if (CanDeleteSelection())
2207     {
2208         DeleteSelectedContent();
2209     }
2210 }
2211
2212 bool wxRichTextCtrl::HasSelection() const
2213 {
2214     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2215 }
2216
2217 bool wxRichTextCtrl::CanCopy() const
2218 {
2219     // Can copy if there's a selection
2220     return HasSelection();
2221 }
2222
2223 bool wxRichTextCtrl::CanCut() const
2224 {
2225     return HasSelection() && IsEditable();
2226 }
2227
2228 bool wxRichTextCtrl::CanPaste() const
2229 {
2230     if ( !IsEditable() )
2231         return false;
2232
2233     return GetBuffer().CanPasteFromClipboard();
2234 }
2235
2236 bool wxRichTextCtrl::CanDeleteSelection() const
2237 {
2238     return HasSelection() && IsEditable();
2239 }
2240
2241
2242 // ----------------------------------------------------------------------------
2243 // Accessors
2244 // ----------------------------------------------------------------------------
2245
2246 void wxRichTextCtrl::SetEditable(bool editable)
2247 {
2248     m_editable = editable;
2249 }
2250
2251 void wxRichTextCtrl::SetInsertionPoint(long pos)
2252 {
2253     SelectNone();
2254
2255     m_caretPosition = pos - 1;
2256 }
2257
2258 void wxRichTextCtrl::SetInsertionPointEnd()
2259 {
2260     long pos = GetLastPosition();
2261     SetInsertionPoint(pos);
2262 }
2263
2264 long wxRichTextCtrl::GetInsertionPoint() const
2265 {
2266     return m_caretPosition+1;
2267 }
2268
2269 wxTextPos wxRichTextCtrl::GetLastPosition() const
2270 {
2271     return GetBuffer().GetRange().GetEnd();
2272 }
2273
2274 // If the return values from and to are the same, there is no
2275 // selection.
2276 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2277 {
2278     *from = m_selectionRange.GetStart();
2279     *to = m_selectionRange.GetEnd();
2280     if ((*to) != -1 && (*to) != -2)
2281         (*to) ++;
2282 }
2283
2284 bool wxRichTextCtrl::IsEditable() const
2285 {
2286     return m_editable;
2287 }
2288
2289 // ----------------------------------------------------------------------------
2290 // selection
2291 // ----------------------------------------------------------------------------
2292
2293 void wxRichTextCtrl::SetSelection(long from, long to)
2294 {
2295     // if from and to are both -1, it means (in wxWidgets) that all text should
2296     // be selected.
2297     if ( (from == -1) && (to == -1) )
2298     {
2299         from = 0;
2300         to = GetLastPosition()+1;
2301     }
2302
2303     DoSetSelection(from, to);
2304 }
2305
2306 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2307 {
2308     m_selectionAnchor = from;
2309     m_selectionRange.SetRange(from, to-1);
2310     if (from > -2)
2311         m_caretPosition = from-1;
2312
2313     Refresh(false);
2314     PositionCaret();
2315 }
2316
2317 // ----------------------------------------------------------------------------
2318 // Editing
2319 // ----------------------------------------------------------------------------
2320
2321 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2322                              const wxString& value)
2323 {
2324     BeginBatchUndo(_("Replace"));
2325
2326     DeleteSelectedContent();
2327
2328     DoWriteText(value, SetValue_SelectionOnly);
2329
2330     EndBatchUndo();
2331 }
2332
2333 void wxRichTextCtrl::Remove(long from, long to)
2334 {
2335     SelectNone();
2336
2337     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to), this);
2338
2339     LayoutContent();
2340     if (!IsFrozen())
2341         Refresh(false);
2342 }
2343
2344 bool wxRichTextCtrl::IsModified() const
2345 {
2346     return m_buffer.IsModified();
2347 }
2348
2349 void wxRichTextCtrl::MarkDirty()
2350 {
2351     m_buffer.Modify(true);
2352 }
2353
2354 void wxRichTextCtrl::DiscardEdits()
2355 {
2356     m_caretPositionForDefaultStyle = -2;
2357     m_buffer.Modify(false);
2358     m_buffer.GetCommandProcessor()->ClearCommands();
2359 }
2360
2361 int wxRichTextCtrl::GetNumberOfLines() const
2362 {
2363     return GetBuffer().GetParagraphCount();
2364 }
2365
2366 // ----------------------------------------------------------------------------
2367 // Positions <-> coords
2368 // ----------------------------------------------------------------------------
2369
2370 long wxRichTextCtrl::XYToPosition(long x, long y) const
2371 {
2372     return GetBuffer().XYToPosition(x, y);
2373 }
2374
2375 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2376 {
2377     return GetBuffer().PositionToXY(pos, x, y);
2378 }
2379
2380 // ----------------------------------------------------------------------------
2381 //
2382 // ----------------------------------------------------------------------------
2383
2384 void wxRichTextCtrl::ShowPosition(long pos)
2385 {
2386     if (!IsPositionVisible(pos))
2387         ScrollIntoView(pos-1, WXK_DOWN);
2388 }
2389
2390 int wxRichTextCtrl::GetLineLength(long lineNo) const
2391 {
2392     return GetBuffer().GetParagraphLength(lineNo);
2393 }
2394
2395 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2396 {
2397     return GetBuffer().GetParagraphText(lineNo);
2398 }
2399
2400 // ----------------------------------------------------------------------------
2401 // Undo/redo
2402 // ----------------------------------------------------------------------------
2403
2404 void wxRichTextCtrl::Undo()
2405 {
2406     if (CanUndo())
2407     {
2408         GetCommandProcessor()->Undo();
2409     }
2410 }
2411
2412 void wxRichTextCtrl::Redo()
2413 {
2414     if (CanRedo())
2415     {
2416         GetCommandProcessor()->Redo();
2417     }
2418 }
2419
2420 bool wxRichTextCtrl::CanUndo() const
2421 {
2422     return GetCommandProcessor()->CanUndo();
2423 }
2424
2425 bool wxRichTextCtrl::CanRedo() const
2426 {
2427     return GetCommandProcessor()->CanRedo();
2428 }
2429
2430 // ----------------------------------------------------------------------------
2431 // implementation details
2432 // ----------------------------------------------------------------------------
2433
2434 void wxRichTextCtrl::Command(wxCommandEvent& event)
2435 {
2436     SetValue(event.GetString());
2437     GetEventHandler()->ProcessEvent(event);
2438 }
2439
2440 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2441 {
2442     // By default, load the first file into the text window.
2443     if (event.GetNumberOfFiles() > 0)
2444     {
2445         LoadFile(event.GetFiles()[0]);
2446     }
2447 }
2448
2449 wxSize wxRichTextCtrl::DoGetBestSize() const
2450 {
2451     return wxSize(10, 10);
2452 }
2453
2454 // ----------------------------------------------------------------------------
2455 // standard handlers for standard edit menu events
2456 // ----------------------------------------------------------------------------
2457
2458 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2459 {
2460     Cut();
2461 }
2462
2463 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2464 {
2465     DeleteSelection();
2466 }
2467
2468 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2469 {
2470     Copy();
2471 }
2472
2473 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2474 {
2475     Paste();
2476 }
2477
2478 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2479 {
2480     Undo();
2481 }
2482
2483 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2484 {
2485     Redo();
2486 }
2487
2488 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2489 {
2490     event.Enable( CanCut() );
2491 }
2492
2493 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2494 {
2495     event.Enable( CanCopy() );
2496 }
2497
2498 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2499 {
2500     event.Enable( CanDeleteSelection() );
2501 }
2502
2503 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2504 {
2505     event.Enable( CanPaste() );
2506 }
2507
2508 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2509 {
2510     event.Enable( CanUndo() );
2511     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2512 }
2513
2514 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2515 {
2516     event.Enable( CanRedo() );
2517     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2518 }
2519
2520 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2521 {
2522     SelectAll();
2523 }
2524
2525 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2526 {
2527     event.Enable(GetLastPosition() > 0);
2528 }
2529
2530 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2531 {
2532     if (event.GetEventObject() != this)
2533     {
2534         event.Skip();
2535         return;
2536     }
2537
2538     if (!m_contextMenu)
2539     {
2540         m_contextMenu = new wxMenu;
2541         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2542         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2543         m_contextMenu->AppendSeparator();
2544         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2545         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2546         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2547         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2548         m_contextMenu->AppendSeparator();
2549         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2550     }
2551     PopupMenu(m_contextMenu);
2552     return;
2553 }
2554
2555 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttrEx& style)
2556 {
2557     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style);
2558 }
2559
2560 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2561 {
2562     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttrEx(style));
2563 }
2564
2565 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxRichTextAttr& style)
2566 {
2567     return GetBuffer().SetStyle(range.ToInternal(), style);
2568 }
2569
2570 // extended style setting operation with flags including:
2571 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2572 // see richtextbuffer.h for more details.
2573 bool wxRichTextCtrl::SetStyleEx(long start, long end, const wxTextAttrEx& style, int flags)
2574 {
2575     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style, flags);
2576 }
2577
2578 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttrEx& style, int flags)
2579 {
2580     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2581 }
2582
2583 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxRichTextAttr& style, int flags)
2584 {
2585     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2586 }
2587
2588 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttrEx& style)
2589 {
2590     return GetBuffer().SetDefaultStyle(style);
2591 }
2592
2593 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2594 {
2595     return GetBuffer().SetDefaultStyle(wxTextAttrEx(style));
2596 }
2597
2598 const wxTextAttrEx& wxRichTextCtrl::GetDefaultStyleEx() const
2599 {
2600     return GetBuffer().GetDefaultStyle();
2601 }
2602
2603 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2604 {
2605     return GetBuffer().GetDefaultStyle();
2606 }
2607
2608 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2609 {
2610     wxTextAttrEx attr(style);
2611     if (GetBuffer().GetStyle(position, attr))
2612     {
2613         style = attr;
2614         return true;
2615     }
2616     else
2617         return false;
2618 }
2619
2620 bool wxRichTextCtrl::GetStyle(long position, wxTextAttrEx& style)
2621 {
2622     return GetBuffer().GetStyle(position, style);
2623 }
2624
2625 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style)
2626 {
2627     return GetBuffer().GetStyle(position, style);
2628 }
2629
2630 // get the common set of styles for the range
2631 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxRichTextAttr& style)
2632 {
2633     wxTextAttrEx styleEx;
2634     if (GetBuffer().GetStyleForRange(range.ToInternal(), styleEx))
2635     {
2636         style = styleEx;
2637         return true;
2638     }
2639     else
2640         return false;
2641 }
2642
2643 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttrEx& style)
2644 {
2645     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2646 }
2647
2648 /// Get the content (uncombined) attributes for this position.
2649
2650 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2651 {
2652     wxTextAttrEx attr(style);
2653     if (GetBuffer().GetUncombinedStyle(position, attr))
2654     {
2655         style = attr;
2656         return true;
2657     }
2658     else
2659         return false;
2660 }
2661
2662 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttrEx& style)
2663 {
2664     return GetBuffer().GetUncombinedStyle(position, style);
2665 }
2666
2667 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style)
2668 {
2669     return GetBuffer().GetUncombinedStyle(position, style);
2670 }
2671
2672 /// Set font, and also the buffer attributes
2673 bool wxRichTextCtrl::SetFont(const wxFont& font)
2674 {
2675     wxControl::SetFont(font);
2676
2677     wxTextAttrEx attr = GetBuffer().GetAttributes();
2678     attr.SetFont(font);
2679     GetBuffer().SetBasicStyle(attr);
2680
2681     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2682     Refresh(false);
2683
2684     return true;
2685 }
2686
2687 /// Transform logical to physical
2688 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2689 {
2690     wxPoint pt;
2691     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2692
2693     return pt;
2694 }
2695
2696 /// Transform physical to logical
2697 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2698 {
2699     wxPoint pt;
2700     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2701
2702     return pt;
2703 }
2704
2705 /// Position the caret
2706 void wxRichTextCtrl::PositionCaret()
2707 {
2708     if (!GetCaret())
2709         return;
2710
2711     //wxLogDebug(wxT("PositionCaret"));
2712
2713     wxRect caretRect;
2714     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2715     {
2716         wxPoint originalPt = caretRect.GetPosition();
2717         wxPoint pt = GetPhysicalPoint(originalPt);
2718         if (GetCaret()->GetPosition() != pt)
2719         {
2720             GetCaret()->Move(pt);
2721             GetCaret()->SetSize(caretRect.GetSize());
2722         }
2723     }
2724 }
2725
2726 /// Get the caret height and position for the given character position
2727 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2728 {
2729     wxClientDC dc(this);
2730     dc.SetFont(GetFont());
2731
2732     PrepareDC(dc);
2733
2734     wxPoint pt;
2735     int height = 0;
2736
2737     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2738     {
2739         // Caret height can't be zero
2740         if (height == 0)
2741             height = dc.GetCharHeight();
2742
2743         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2744         return true;
2745     }
2746
2747     return false;
2748 }
2749
2750 /// Gets the line for the visible caret position. If the caret is
2751 /// shown at the very end of the line, it means the next character is actually
2752 /// on the following line. So let's get the line we're expecting to find
2753 /// if this is the case.
2754 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2755 {
2756     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2757     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2758     if (line)
2759     {
2760         wxRichTextRange lineRange = line->GetAbsoluteRange();
2761         if (caretPosition == lineRange.GetStart()-1 &&
2762             (para->GetRange().GetStart() != lineRange.GetStart()))
2763         {
2764             if (!m_caretAtLineStart)
2765                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2766         }
2767     }
2768     return line;
2769 }
2770
2771
2772 /// Move the caret to the given character position
2773 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2774 {
2775     if (GetBuffer().GetDirty())
2776         LayoutContent();
2777
2778     if (pos <= GetBuffer().GetRange().GetEnd())
2779     {
2780         SetCaretPosition(pos, showAtLineStart);
2781
2782         PositionCaret();
2783
2784         return true;
2785     }
2786     else
2787         return false;
2788 }
2789
2790 /// Layout the buffer: which we must do before certain operations, such as
2791 /// setting the caret position.
2792 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2793 {
2794     if (GetBuffer().GetDirty() || onlyVisibleRect)
2795     {
2796         wxRect availableSpace(GetClientSize());
2797         if (availableSpace.width == 0)
2798             availableSpace.width = 10;
2799         if (availableSpace.height == 0)
2800             availableSpace.height = 10;
2801
2802         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2803         if (onlyVisibleRect)
2804         {
2805             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2806             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2807         }
2808
2809         wxClientDC dc(this);
2810         dc.SetFont(GetFont());
2811
2812         PrepareDC(dc);
2813
2814         GetBuffer().Defragment();
2815         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2816         GetBuffer().Layout(dc, availableSpace, flags);
2817         GetBuffer().SetDirty(false);
2818
2819         if (!IsFrozen())
2820             SetupScrollbars();
2821     }
2822
2823     return true;
2824 }
2825
2826 /// Is all of the selection bold?
2827 bool wxRichTextCtrl::IsSelectionBold()
2828 {
2829     if (HasSelection())
2830     {
2831         wxRichTextAttr attr;
2832         wxRichTextRange range = GetSelectionRange();
2833         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2834         attr.SetFontWeight(wxBOLD);
2835
2836         return HasCharacterAttributes(range, attr);
2837     }
2838     else
2839     {
2840         // If no selection, then we need to combine current style with default style
2841         // to see what the effect would be if we started typing.
2842         wxRichTextAttr attr;
2843         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2844
2845         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2846         if (GetStyle(pos, attr))
2847         {
2848             if (IsDefaultStyleShowing())
2849                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2850             return attr.GetFontWeight() == wxBOLD;
2851         }
2852     }
2853     return false;
2854 }
2855
2856 /// Is all of the selection italics?
2857 bool wxRichTextCtrl::IsSelectionItalics()
2858 {
2859     if (HasSelection())
2860     {
2861         wxRichTextRange range = GetSelectionRange();
2862         wxRichTextAttr attr;
2863         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2864         attr.SetFontStyle(wxITALIC);
2865
2866         return HasCharacterAttributes(range, attr);
2867     }
2868     else
2869     {
2870         // If no selection, then we need to combine current style with default style
2871         // to see what the effect would be if we started typing.
2872         wxRichTextAttr attr;
2873         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2874
2875         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2876         if (GetStyle(pos, attr))
2877         {
2878             if (IsDefaultStyleShowing())
2879                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2880             return attr.GetFontStyle() == wxITALIC;
2881         }
2882     }
2883     return false;
2884 }
2885
2886 /// Is all of the selection underlined?
2887 bool wxRichTextCtrl::IsSelectionUnderlined()
2888 {
2889     if (HasSelection())
2890     {
2891         wxRichTextRange range = GetSelectionRange();
2892         wxRichTextAttr attr;
2893         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2894         attr.SetFontUnderlined(true);
2895
2896         return HasCharacterAttributes(range, attr);
2897     }
2898     else
2899     {
2900         // If no selection, then we need to combine current style with default style
2901         // to see what the effect would be if we started typing.
2902         wxRichTextAttr attr;
2903         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2904         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2905
2906         if (GetStyle(pos, attr))
2907         {
2908             if (IsDefaultStyleShowing())
2909                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2910             return attr.GetFontUnderlined();
2911         }
2912     }
2913     return false;
2914 }
2915
2916 /// Apply bold to the selection
2917 bool wxRichTextCtrl::ApplyBoldToSelection()
2918 {
2919     wxRichTextAttr attr;
2920     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2921     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
2922
2923     if (HasSelection())
2924         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2925     else
2926         SetAndShowDefaultStyle(attr);
2927     return true;
2928 }
2929
2930 /// Apply italic to the selection
2931 bool wxRichTextCtrl::ApplyItalicToSelection()
2932 {
2933     wxRichTextAttr attr;
2934     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2935     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
2936
2937     if (HasSelection())
2938         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2939     else
2940         SetAndShowDefaultStyle(attr);
2941     return true;
2942 }
2943
2944 /// Apply underline to the selection
2945 bool wxRichTextCtrl::ApplyUnderlineToSelection()
2946 {
2947     wxRichTextAttr attr;
2948     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2949     attr.SetFontUnderlined(!IsSelectionUnderlined());
2950
2951     if (HasSelection())
2952         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2953     else
2954         SetAndShowDefaultStyle(attr);
2955     return true;
2956 }
2957
2958 /// Is all of the selection aligned according to the specified flag?
2959 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
2960 {
2961     wxRichTextRange range;
2962     if (HasSelection())
2963         range = GetSelectionRange();
2964     else
2965         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
2966
2967     wxRichTextAttr attr;
2968     attr.SetAlignment(alignment);
2969
2970     return HasParagraphAttributes(range, attr);
2971 }
2972
2973 /// Apply alignment to the selection
2974 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
2975 {
2976     wxRichTextAttr attr;
2977     attr.SetAlignment(alignment);
2978     if (HasSelection())
2979         return SetStyle(GetSelectionRange(), attr);
2980     else
2981     {
2982         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
2983         if (para)
2984             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
2985     }
2986     return true;
2987 }
2988
2989 /// Apply a named style to the selection
2990 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
2991 {
2992     // Flags are defined within each definition, so only certain
2993     // attributes are applied.
2994     wxRichTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
2995
2996     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE;
2997
2998     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
2999     {
3000         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3001
3002         wxRichTextRange range;
3003
3004         if (HasSelection())
3005             range = GetSelectionRange();
3006         else
3007         {
3008             long pos = GetAdjustedCaretPosition(GetCaretPosition());
3009             range = wxRichTextRange(pos, pos+1);
3010         }
3011
3012         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
3013     }
3014
3015     // Make sure the attr has the style name
3016     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
3017     {
3018         attr.SetParagraphStyleName(def->GetName());
3019
3020         // If applying a paragraph style, we only want the paragraph nodes to adopt these
3021         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
3022         // to change its style independently.
3023         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3024     }
3025     else
3026         attr.SetCharacterStyleName(def->GetName());
3027
3028     if (HasSelection())
3029         return SetStyleEx(GetSelectionRange(), attr, flags);
3030     else
3031     {
3032         SetAndShowDefaultStyle(attr);
3033         return true;
3034     }
3035 }
3036
3037 /// Apply the style sheet to the buffer, for example if the styles have changed.
3038 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
3039 {
3040     if (!styleSheet)
3041         styleSheet = GetBuffer().GetStyleSheet();
3042     if (!styleSheet)
3043         return false;
3044
3045     if (GetBuffer().ApplyStyleSheet(styleSheet))
3046     {
3047         GetBuffer().Invalidate(wxRICHTEXT_ALL);
3048         Refresh(false);
3049         return true;
3050     }
3051     else
3052         return false;
3053 }
3054
3055 /// Sets the default style to the style under the cursor
3056 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3057 {
3058     wxTextAttrEx attr;
3059     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3060
3061     // If at the start of a paragraph, use the next position.
3062     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3063
3064     if (GetUncombinedStyle(pos, attr))
3065     {
3066         SetDefaultStyle(attr);
3067         return true;
3068     }
3069
3070     return false;
3071 }
3072
3073 /// Returns the first visible position in the current view
3074 long wxRichTextCtrl::GetFirstVisiblePosition() const
3075 {
3076     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3077     if (line)
3078         return line->GetAbsoluteRange().GetStart();
3079     else
3080         return 0;
3081 }
3082
3083 /// Get the first visible point in the window
3084 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3085 {
3086     int ppuX, ppuY;
3087     int startXUnits, startYUnits;
3088
3089     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3090     GetViewStart(& startXUnits, & startYUnits);
3091
3092     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3093 }
3094
3095 /// The adjusted caret position is the character position adjusted to take
3096 /// into account whether we're at the start of a paragraph, in which case
3097 /// style information should be taken from the next position, not current one.
3098 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3099 {
3100     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3101
3102     if (para && (caretPos+1 == para->GetRange().GetStart()))
3103         caretPos ++;
3104     return caretPos;
3105 }
3106
3107 /// Get/set the selection range in character positions. -1, -1 means no selection.
3108 /// The range is in API convention, i.e. a single character selection is denoted
3109 /// by (n, n+1)
3110 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3111 {
3112     wxRichTextRange range = GetInternalSelectionRange();
3113     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3114         range.SetEnd(range.GetEnd() + 1);
3115     return range;
3116 }
3117
3118 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3119 {
3120     wxRichTextRange range1(range);
3121     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3122         range1.SetEnd(range1.GetEnd() - 1);
3123
3124     wxASSERT( range1.GetStart() > range1.GetEnd() );
3125
3126     SetInternalSelectionRange(range1);
3127 }
3128
3129 /// Set list style
3130 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3131 {
3132     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3133 }
3134
3135 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3136 {
3137     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3138 }
3139
3140 /// Clear list for given range
3141 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3142 {
3143     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3144 }
3145
3146 /// Number/renumber any list elements in the given range
3147 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3148 {
3149     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3150 }
3151
3152 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3153 {
3154     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3155 }
3156
3157 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3158 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3159 {
3160     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3161 }
3162
3163 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3164 {
3165     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3166 }
3167
3168 /// Deletes the content in the given range
3169 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3170 {
3171     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3172 }
3173
3174 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3175 {
3176     if (sm_availableFontNames.GetCount() == 0)
3177     {
3178         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3179         sm_availableFontNames.Sort();
3180     }
3181     return sm_availableFontNames;
3182 }
3183
3184 void wxRichTextCtrl::ClearAvailableFontNames()
3185 {
3186     sm_availableFontNames.Clear();
3187 }
3188
3189 #endif
3190     // wxUSE_RICHTEXT