src/richtext/richtextctrl.cpp

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