src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richeditctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/textfile.h"
  30 #include "wx/ffile.h"
  31 #include "wx/filename.h"
  32 #include "wx/dcbuffer.h"
  33 #include "wx/arrimpl.cpp"
  34 #include "wx/fontenum.h"
  35
  36 // DLL options compatibility check:
  37 #include "wx/app.h"
  38 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  39
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_CLICK)
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RETURN)
  45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CHARACTER)
  46 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_DELETE)
  47
  48 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING)
  49 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED)
  50 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING)
  51 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED)
  52
  53 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED)
  54 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED)
  55 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED)
  56 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED)
  57
  58 IMPLEMENT_CLASS( wxRichTextCtrl, wxControl )
  59
  60 IMPLEMENT_CLASS( wxRichTextEvent, wxNotifyEvent )
  61
  62 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
  63     EVT_PAINT(wxRichTextCtrl::OnPaint)
  64     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
  65     EVT_IDLE(wxRichTextCtrl::OnIdle)
  66     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
  67     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
  68     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
  69     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
  70     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
  71     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
  72     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
  73     EVT_CHAR(wxRichTextCtrl::OnChar)
  74     EVT_SIZE(wxRichTextCtrl::OnSize)
  75     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
  76     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
  77     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
  78     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
  79
  80     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
  81     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
  82
  83     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
  84     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
  85
  86     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
  87     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
  88
  89     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
  90     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
  91
  92     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
  93     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
  94
  95     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
  96     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
  97
  98     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
  99     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 100 END_EVENT_TABLE()
 101
 102 /*!
 103  * wxRichTextCtrl
 104  */
 105
 106 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 107
 108 wxRichTextCtrl::wxRichTextCtrl()
 109               : wxScrollHelper(this)
 110 {
 111     Init();
 112 }
 113
 114 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 115                                wxWindowID id,
 116                                const wxString& value,
 117                                const wxPoint& pos,
 118                                const wxSize& size,
 119                                long style,
 120                                const wxValidator& validator,
 121                                const wxString& name)
 122               : wxScrollHelper(this)
 123 {
 124     Init();
 125     Create(parent, id, value, pos, size, style, validator, name);
 126 }
 127
 128 /// Creation
 129 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 130                              const wxValidator& validator, const wxString& name)
 131 {
 132     if (!wxTextCtrlBase::Create(parent, id, pos, size,
 133                                 style|wxFULL_REPAINT_ON_RESIZE,
 134                                 validator, name))
 135         return false;
 136
 137     if (!GetFont().Ok())
 138     {
 139         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 140     }
 141
 142     GetBuffer().Reset();
 143     GetBuffer().SetRichTextCtrl(this);
 144
 145     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 146     GetCaret()->Show();
 147
 148     if (style & wxTE_READONLY)
 149         SetEditable(false);
 150
 151     // The base attributes must all have default values
 152     wxTextAttrEx attributes;
 153     attributes.SetFont(GetFont());
 154     attributes.SetTextColour(*wxBLACK);
 155     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 156     attributes.SetLineSpacing(10);
 157     attributes.SetParagraphSpacingAfter(10);
 158     attributes.SetParagraphSpacingBefore(0);
 159     attributes.SetTextEffects(0);
 160     attributes.SetTextEffectFlags(wxTEXT_ATTR_EFFECT_STRIKETHROUGH|wxTEXT_ATTR_EFFECT_CAPITALS);
 161
 162     SetBasicStyle(attributes);
 163
 164     // The default attributes will be merged with base attributes, so
 165     // can be empty to begin with
 166     wxTextAttrEx defaultAttributes;
 167     SetDefaultStyle(defaultAttributes);
 168
 169     SetBackgroundColour(*wxWHITE);
 170     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 171
 172     // Tell the sizers to use the given or best size
 173     SetInitialSize(size);
 174
 175 #if wxRICHTEXT_BUFFERED_PAINTING
 176     // Create a buffer
 177     RecreateBuffer(size);
 178 #endif
 179
 180     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 181     m_urlCursor = wxCursor(wxCURSOR_HAND);
 182
 183     SetCursor(m_textCursor);
 184
 185     if (!value.IsEmpty())
 186         SetValue(value);
 187
 188     GetBuffer().AddEventHandler(this);
 189
 190     return true;
 191 }
 192
 193 wxRichTextCtrl::~wxRichTextCtrl()
 194 {
 195     GetBuffer().RemoveEventHandler(this);
 196
 197     delete m_contextMenu;
 198 }
 199
 200 /// Member initialisation
 201 void wxRichTextCtrl::Init()
 202 {
 203     m_freezeCount = 0;
 204     m_contextMenu = NULL;
 205     m_caret = NULL;
 206     m_caretPosition = -1;
 207     m_selectionRange.SetRange(-2, -2);
 208     m_selectionAnchor = -2;
 209     m_editable = true;
 210     m_caretAtLineStart = false;
 211     m_dragging = false;
 212     m_fullLayoutRequired = false;
 213     m_fullLayoutTime = 0;
 214     m_fullLayoutSavedPosition = 0;
 215     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 216     m_caretPositionForDefaultStyle = -2;
 217 }
 218
 219 /// Call Freeze to prevent refresh
 220 void wxRichTextCtrl::Freeze()
 221 {
 222     m_freezeCount ++;
 223 }
 224
 225 /// Call Thaw to refresh
 226 void wxRichTextCtrl::Thaw()
 227 {
 228     m_freezeCount --;
 229
 230     if (m_freezeCount == 0)
 231     {
 232         SetupScrollbars();
 233         Refresh(false);
 234     }
 235 }
 236
 237 /// Clear all text
 238 void wxRichTextCtrl::Clear()
 239 {
 240     m_buffer.ResetAndClearCommands();
 241     m_buffer.SetDirty(true);
 242     m_caretPosition = -1;
 243     m_caretPositionForDefaultStyle = -2;
 244     m_caretAtLineStart = false;
 245     m_selectionRange.SetRange(-2, -2);
 246
 247     SetScrollbars(0, 0, 0, 0, 0, 0);
 248
 249     if (m_freezeCount == 0)
 250     {
 251         SetupScrollbars();
 252         Refresh(false);
 253     }
 254     SendTextUpdatedEvent();
 255 }
 256
 257 /// Painting
 258 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 259 {
 260     if (GetCaret() && GetCaret()->IsVisible())
 261         GetCaret()->Hide();
 262
 263     {
 264 #if wxRICHTEXT_BUFFERED_PAINTING
 265         wxBufferedPaintDC dc(this, m_bufferBitmap);
 266 #else
 267         wxPaintDC dc(this);
 268 #endif
 269         PrepareDC(dc);
 270
 271         if (m_freezeCount > 0)
 272             return;
 273
 274         dc.SetFont(GetFont());
 275
 276         // Paint the background
 277         PaintBackground(dc);
 278
 279         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 280
 281         wxRect drawingArea(GetUpdateRegion().GetBox());
 282         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 283
 284         wxRect availableSpace(GetClientSize());
 285         if (GetBuffer().GetDirty())
 286         {
 287             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 288             GetBuffer().SetDirty(false);
 289             SetupScrollbars();
 290         }
 291
 292         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 293     }
 294
 295     if (GetCaret() && !GetCaret()->IsVisible())
 296         GetCaret()->Show();
 297
 298     PositionCaret();
 299 }
 300
 301 // Empty implementation, to prevent flicker
 302 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 303 {
 304 }
 305
 306 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 307 {
 308     if (GetCaret())
 309     {
 310         if (!GetCaret()->IsVisible())
 311             GetCaret()->Show();
 312         PositionCaret();
 313     }
 314
 315     // if (!IsFrozen())
 316     //    Refresh(false);
 317 }
 318
 319 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 320 {
 321     if (GetCaret() && GetCaret()->IsVisible())
 322         GetCaret()->Hide();
 323
 324     // if (!IsFrozen())
 325     //    Refresh(false);
 326 }
 327
 328 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 329 {
 330     m_dragging = false;
 331 }
 332
 333 /// Left-click
 334 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 335 {
 336     SetFocus();
 337
 338     wxClientDC dc(this);
 339     PrepareDC(dc);
 340     dc.SetFont(GetFont());
 341
 342     long position = 0;
 343     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 344
 345     if (hit != wxRICHTEXT_HITTEST_NONE)
 346     {
 347         m_dragStart = event.GetLogicalPosition(dc);
 348         m_dragging = true;
 349         CaptureMouse();
 350
 351         SelectNone();
 352
 353         bool caretAtLineStart = false;
 354
 355         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 356         {
 357             // If we're at the start of a line (but not first in para)
 358             // then we should keep the caret showing at the start of the line
 359             // by showing the m_caretAtLineStart flag.
 360             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 361             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 362
 363             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 364                 caretAtLineStart = true;
 365             position --;
 366         }
 367
 368         MoveCaret(position, caretAtLineStart);
 369         SetDefaultStyleToCursorStyle();
 370     }
 371
 372     event.Skip();
 373 }
 374
 375 /// Left-up
 376 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 377 {
 378     if (m_dragging)
 379     {
 380         m_dragging = false;
 381         if (GetCapture() == this)
 382             ReleaseMouse();
 383
 384         // See if we clicked on a URL
 385         wxClientDC dc(this);
 386         PrepareDC(dc);
 387         dc.SetFont(GetFont());
 388
 389         long position = 0;
 390         wxPoint logicalPt = event.GetLogicalPosition(dc);
 391         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 392
 393         if (hit != wxRICHTEXT_HITTEST_NONE)
 394         {
 395             wxTextAttrEx attr;
 396             if (GetStyle(position, attr))
 397             {
 398                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 399                 {
 400                     wxString urlTarget = attr.GetURL();
 401                     if (!urlTarget.IsEmpty())
 402                     {
 403                         wxMouseEvent mouseEvent(event);
 404
 405                         long startPos = 0, endPos = 0;
 406                         wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 407                         if (obj)
 408                         {
 409                             startPos = obj->GetRange().GetStart();
 410                             endPos = obj->GetRange().GetEnd();
 411                         }
 412
 413                         wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 414                         InitCommandEvent(urlEvent);
 415
 416                         urlEvent.SetString(urlTarget);
 417
 418                         GetEventHandler()->ProcessEvent(urlEvent);
 419                     }
 420                 }
 421             }
 422         }
 423     }
 424 }
 425
 426 /// Left-click
 427 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 428 {
 429     wxClientDC dc(this);
 430     PrepareDC(dc);
 431     dc.SetFont(GetFont());
 432
 433     long position = 0;
 434     wxPoint logicalPt = event.GetLogicalPosition(dc);
 435     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 436
 437     // See if we need to change the cursor
 438
 439     {
 440         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 441         {
 442             wxTextAttrEx attr;
 443             if (GetStyle(position, attr))
 444             {
 445                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 446                 {
 447                     SetCursor(m_urlCursor);
 448                 }
 449                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 450                 {
 451                     SetCursor(m_textCursor);
 452                 }
 453             }
 454         }
 455         else
 456             SetCursor(m_textCursor);
 457     }
 458
 459     if (!event.Dragging())
 460     {
 461         event.Skip();
 462         return;
 463     }
 464
 465     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 466     {
 467         // TODO: test closeness
 468
 469         bool caretAtLineStart = false;
 470
 471         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 472         {
 473             // If we're at the start of a line (but not first in para)
 474             // then we should keep the caret showing at the start of the line
 475             // by showing the m_caretAtLineStart flag.
 476             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 477             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 478
 479             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 480                 caretAtLineStart = true;
 481             position --;
 482         }
 483
 484         if (m_caretPosition != position)
 485         {
 486             bool extendSel = ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 487
 488             MoveCaret(position, caretAtLineStart);
 489             SetDefaultStyleToCursorStyle();
 490
 491             if (extendSel)
 492                 Refresh(false);
 493         }
 494     }
 495 }
 496
 497 /// Right-click
 498 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 499 {
 500     SetFocus();
 501     event.Skip();
 502 }
 503
 504 /// Left-double-click
 505 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& event)
 506 {
 507     SelectWord(GetCaretPosition()+1);
 508     event.Skip();
 509 }
 510
 511 /// Middle-click
 512 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 513 {
 514     event.Skip();
 515 }
 516
 517 /// Key press
 518 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 519 {
 520     int flags = 0;
 521     if (event.CmdDown())
 522         flags |= wxRICHTEXT_CTRL_DOWN;
 523     if (event.ShiftDown())
 524         flags |= wxRICHTEXT_SHIFT_DOWN;
 525     if (event.AltDown())
 526         flags |= wxRICHTEXT_ALT_DOWN;
 527
 528     if (event.GetKeyCode() == WXK_LEFT ||
 529         event.GetKeyCode() == WXK_RIGHT ||
 530         event.GetKeyCode() == WXK_UP ||
 531         event.GetKeyCode() == WXK_DOWN ||
 532         event.GetKeyCode() == WXK_HOME ||
 533         event.GetKeyCode() == WXK_PAGEUP ||
 534         event.GetKeyCode() == WXK_PAGEDOWN ||
 535         event.GetKeyCode() == WXK_END ||
 536
 537         event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 538         event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 539         event.GetKeyCode() == WXK_NUMPAD_UP ||
 540         event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 541         event.GetKeyCode() == WXK_NUMPAD_HOME ||
 542         event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 543         event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 544         event.GetKeyCode() == WXK_NUMPAD_END)
 545     {
 546         KeyboardNavigate(event.GetKeyCode(), flags);
 547         return;
 548     }
 549
 550     // all the other keys modify the controls contents which shouldn't be
 551     // possible if we're read-only
 552     if ( !IsEditable() )
 553     {
 554         event.Skip();
 555         return;
 556     }
 557
 558     if (event.GetKeyCode() == WXK_RETURN)
 559     {
 560         BeginBatchUndo(_("Insert Text"));
 561
 562         long newPos = m_caretPosition;
 563
 564         DeleteSelectedContent(& newPos);
 565
 566         if (event.ShiftDown())
 567         {
 568             wxString text;
 569             text = wxRichTextLineBreakChar;
 570             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 571         }
 572         else
 573             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
 574
 575         EndBatchUndo();
 576         SetDefaultStyleToCursorStyle();
 577
 578         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 579
 580         wxRichTextEvent cmdEvent(
 581             wxEVT_COMMAND_RICHTEXT_RETURN,
 582             GetId());
 583         cmdEvent.SetEventObject(this);
 584         cmdEvent.SetFlags(flags);
 585         cmdEvent.SetPosition(newPos+1);
 586
 587         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 588         {
 589             // Generate conventional event
 590             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 591             InitCommandEvent(textEvent);
 592
 593             GetEventHandler()->ProcessEvent(textEvent);
 594         }
 595         Update();
 596     }
 597     else if (event.GetKeyCode() == WXK_BACK)
 598     {
 599         BeginBatchUndo(_("Delete Text"));
 600
 601         // Submit range in character positions, which are greater than caret positions,
 602         // so subtract 1 for deleted character and add 1 for conversion to character position.
 603         if (m_caretPosition > -1 && !HasSelection())
 604         {
 605             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition, m_caretPosition), this);
 606         }
 607         else
 608             DeleteSelectedContent();
 609
 610         EndBatchUndo();
 611
 612         if (GetLastPosition() == -1)
 613         {
 614             GetBuffer().Reset();
 615
 616             m_caretPosition = -1;
 617             PositionCaret();
 618             SetDefaultStyleToCursorStyle();
 619         }
 620
 621         ScrollIntoView(m_caretPosition, WXK_LEFT);
 622
 623         wxRichTextEvent cmdEvent(
 624             wxEVT_COMMAND_RICHTEXT_DELETE,
 625             GetId());
 626         cmdEvent.SetEventObject(this);
 627         cmdEvent.SetFlags(flags);
 628         cmdEvent.SetPosition(m_caretPosition+1);
 629         GetEventHandler()->ProcessEvent(cmdEvent);
 630
 631         Update();
 632     }
 633     else if (event.GetKeyCode() == WXK_DELETE)
 634     {
 635         BeginBatchUndo(_("Delete Text"));
 636
 637         // Submit range in character positions, which are greater than caret positions,
 638         if (m_caretPosition < GetBuffer().GetRange().GetEnd()+1 && !HasSelection())
 639         {
 640             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition+1, m_caretPosition+1), this);
 641         }
 642         else
 643             DeleteSelectedContent();
 644
 645         EndBatchUndo();
 646
 647         if (GetLastPosition() == -1)
 648         {
 649             GetBuffer().Reset();
 650
 651             m_caretPosition = -1;
 652             PositionCaret();
 653             SetDefaultStyleToCursorStyle();
 654         }
 655
 656         wxRichTextEvent cmdEvent(
 657             wxEVT_COMMAND_RICHTEXT_DELETE,
 658             GetId());
 659         cmdEvent.SetEventObject(this);
 660         cmdEvent.SetFlags(flags);
 661         cmdEvent.SetPosition(m_caretPosition+1);
 662         GetEventHandler()->ProcessEvent(cmdEvent);
 663
 664         Update();
 665     }
 666     else
 667     {
 668         long keycode = event.GetKeyCode();
 669         switch ( keycode )
 670         {
 671             case WXK_ESCAPE:
 672             case WXK_DELETE:
 673             case WXK_START:
 674             case WXK_LBUTTON:
 675             case WXK_RBUTTON:
 676             case WXK_CANCEL:
 677             case WXK_MBUTTON:
 678             case WXK_CLEAR:
 679             case WXK_SHIFT:
 680             case WXK_ALT:
 681             case WXK_CONTROL:
 682             case WXK_MENU:
 683             case WXK_PAUSE:
 684             case WXK_CAPITAL:
 685             case WXK_END:
 686             case WXK_HOME:
 687             case WXK_LEFT:
 688             case WXK_UP:
 689             case WXK_RIGHT:
 690             case WXK_DOWN:
 691             case WXK_SELECT:
 692             case WXK_PRINT:
 693             case WXK_EXECUTE:
 694             case WXK_SNAPSHOT:
 695             case WXK_INSERT:
 696             case WXK_HELP:
 697             case WXK_NUMPAD0:
 698             case WXK_NUMPAD1:
 699             case WXK_NUMPAD2:
 700             case WXK_NUMPAD3:
 701             case WXK_NUMPAD4:
 702             case WXK_NUMPAD5:
 703             case WXK_NUMPAD6:
 704             case WXK_NUMPAD7:
 705             case WXK_NUMPAD8:
 706             case WXK_NUMPAD9:
 707             case WXK_MULTIPLY:
 708             case WXK_ADD:
 709             case WXK_SEPARATOR:
 710             case WXK_SUBTRACT:
 711             case WXK_DECIMAL:
 712             case WXK_DIVIDE:
 713             case WXK_F1:
 714             case WXK_F2:
 715             case WXK_F3:
 716             case WXK_F4:
 717             case WXK_F5:
 718             case WXK_F6:
 719             case WXK_F7:
 720             case WXK_F8:
 721             case WXK_F9:
 722             case WXK_F10:
 723             case WXK_F11:
 724             case WXK_F12:
 725             case WXK_F13:
 726             case WXK_F14:
 727             case WXK_F15:
 728             case WXK_F16:
 729             case WXK_F17:
 730             case WXK_F18:
 731             case WXK_F19:
 732             case WXK_F20:
 733             case WXK_F21:
 734             case WXK_F22:
 735             case WXK_F23:
 736             case WXK_F24:
 737             case WXK_NUMLOCK:
 738             case WXK_SCROLL:
 739             case WXK_PAGEUP:
 740             case WXK_PAGEDOWN:
 741             case WXK_NUMPAD_SPACE:
 742             case WXK_NUMPAD_TAB:
 743             case WXK_NUMPAD_ENTER:
 744             case WXK_NUMPAD_F1:
 745             case WXK_NUMPAD_F2:
 746             case WXK_NUMPAD_F3:
 747             case WXK_NUMPAD_F4:
 748             case WXK_NUMPAD_HOME:
 749             case WXK_NUMPAD_LEFT:
 750             case WXK_NUMPAD_UP:
 751             case WXK_NUMPAD_RIGHT:
 752             case WXK_NUMPAD_DOWN:
 753             case WXK_NUMPAD_PAGEUP:
 754             case WXK_NUMPAD_PAGEDOWN:
 755             case WXK_NUMPAD_END:
 756             case WXK_NUMPAD_BEGIN:
 757             case WXK_NUMPAD_INSERT:
 758             case WXK_NUMPAD_DELETE:
 759             case WXK_NUMPAD_EQUAL:
 760             case WXK_NUMPAD_MULTIPLY:
 761             case WXK_NUMPAD_ADD:
 762             case WXK_NUMPAD_SEPARATOR:
 763             case WXK_NUMPAD_SUBTRACT:
 764             case WXK_NUMPAD_DECIMAL:
 765             case WXK_WINDOWS_LEFT:
 766             {
 767                 event.Skip();
 768                 return;
 769             }
 770
 771             default:
 772             {
 773                 if (event.CmdDown() || event.AltDown())
 774                 {
 775                     event.Skip();
 776                     return;
 777                 }
 778
 779                 wxRichTextEvent cmdEvent(
 780                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
 781                     GetId());
 782                 cmdEvent.SetEventObject(this);
 783                 cmdEvent.SetFlags(flags);
 784                 cmdEvent.SetCharacter((wxChar) keycode);
 785                 cmdEvent.SetPosition(m_caretPosition+1);
 786
 787                 if (keycode == wxT('\t'))
 788                 {
 789                     // See if we need to promote or demote the selection or paragraph at the cursor
 790                     // position, instead of inserting a tab.
 791                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
 792                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
 793                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
 794                     {
 795                         wxRichTextRange range;
 796                         if (HasSelection())
 797                             range = GetSelectionRange();
 798                         else
 799                             range = para->GetRange().FromInternal();
 800
 801                         int promoteBy = event.ShiftDown() ? 1 : -1;
 802
 803                         PromoteList(promoteBy, range, NULL);
 804
 805                         GetEventHandler()->ProcessEvent(cmdEvent);
 806
 807                         return;
 808                     }
 809                 }
 810
 811                 BeginBatchUndo(_("Insert Text"));
 812
 813                 long newPos = m_caretPosition;
 814                 DeleteSelectedContent(& newPos);
 815
 816                 wxString str = (wxChar) event.GetKeyCode();
 817                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
 818
 819                 EndBatchUndo();
 820
 821                 SetDefaultStyleToCursorStyle();
 822                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
 823
 824                 GetEventHandler()->ProcessEvent(cmdEvent);
 825
 826                 Update();
 827             }
 828         }
 829     }
 830 }
 831
 832 /// Delete content if there is a selection, e.g. when pressing a key.
 833 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
 834 {
 835     if (HasSelection())
 836     {
 837         long pos = m_selectionRange.GetStart();
 838         GetBuffer().DeleteRangeWithUndo(m_selectionRange, this);
 839         m_selectionRange.SetRange(-2, -2);
 840
 841         if (newPos)
 842             *newPos = pos-1;
 843         return true;
 844     }
 845     else
 846         return false;
 847 }
 848
 849 /// Keyboard navigation
 850
 851 /*
 852
 853 Left:       left one character
 854 Right:      right one character
 855 Up:         up one line
 856 Down:       down one line
 857 Ctrl-Left:  left one word
 858 Ctrl-Right: right one word
 859 Ctrl-Up:    previous paragraph start
 860 Ctrl-Down:  next start of paragraph
 861 Home:       start of line
 862 End:        end of line
 863 Ctrl-Home:  start of document
 864 Ctrl-End:   end of document
 865 Page-Up:    Up a screen
 866 Page-Down:  Down a screen
 867
 868 Maybe:
 869
 870 Ctrl-Alt-PgUp: Start of window
 871 Ctrl-Alt-PgDn: End of window
 872 F8:         Start selection mode
 873 Esc:        End selection mode
 874
 875 Adding Shift does the above but starts/extends selection.
 876
 877
 878  */
 879
 880 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
 881 {
 882     bool success = false;
 883
 884     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
 885     {
 886         if (flags & wxRICHTEXT_CTRL_DOWN)
 887             success = WordRight(1, flags);
 888         else
 889             success = MoveRight(1, flags);
 890     }
 891     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
 892     {
 893         if (flags & wxRICHTEXT_CTRL_DOWN)
 894             success = WordLeft(1, flags);
 895         else
 896             success = MoveLeft(1, flags);
 897     }
 898     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
 899     {
 900         if (flags & wxRICHTEXT_CTRL_DOWN)
 901             success = MoveToParagraphStart(flags);
 902         else
 903             success = MoveUp(1, flags);
 904     }
 905     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
 906     {
 907         if (flags & wxRICHTEXT_CTRL_DOWN)
 908             success = MoveToParagraphEnd(flags);
 909         else
 910             success = MoveDown(1, flags);
 911     }
 912     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
 913     {
 914         success = PageUp(1, flags);
 915     }
 916     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
 917     {
 918         success = PageDown(1, flags);
 919     }
 920     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
 921     {
 922         if (flags & wxRICHTEXT_CTRL_DOWN)
 923             success = MoveHome(flags);
 924         else
 925             success = MoveToLineStart(flags);
 926     }
 927     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
 928     {
 929         if (flags & wxRICHTEXT_CTRL_DOWN)
 930             success = MoveEnd(flags);
 931         else
 932             success = MoveToLineEnd(flags);
 933     }
 934
 935     if (success)
 936     {
 937         ScrollIntoView(m_caretPosition, keyCode);
 938         SetDefaultStyleToCursorStyle();
 939     }
 940
 941     return success;
 942 }
 943
 944 /// Extend the selection. Selections are in caret positions.
 945 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
 946 {
 947     if (flags & wxRICHTEXT_SHIFT_DOWN)
 948     {
 949         // If not currently selecting, start selecting
 950         if (m_selectionRange.GetStart() == -2)
 951         {
 952             m_selectionAnchor = oldPos;
 953
 954             if (oldPos > newPos)
 955                 m_selectionRange.SetRange(newPos+1, oldPos);
 956             else
 957                 m_selectionRange.SetRange(oldPos+1, newPos);
 958         }
 959         else
 960         {
 961             // Always ensure that the selection range start is greater than
 962             // the end.
 963             if (newPos > m_selectionAnchor)
 964                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
 965             else
 966                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
 967         }
 968
 969         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
 970         {
 971             wxLogDebug(wxT("Strange selection range"));
 972         }
 973
 974         return true;
 975     }
 976     else
 977         return false;
 978 }
 979
 980 /// Scroll into view, returning true if we scrolled.
 981 /// This takes a _caret_ position.
 982 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
 983 {
 984     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
 985
 986     if (!line)
 987         return false;
 988
 989     int ppuX, ppuY;
 990     GetScrollPixelsPerUnit(& ppuX, & ppuY);
 991
 992     int startXUnits, startYUnits;
 993     GetViewStart(& startXUnits, & startYUnits);
 994     int startY = startYUnits * ppuY;
 995
 996     int sx = 0, sy = 0;
 997     GetVirtualSize(& sx, & sy);
 998     int sxUnits = 0;
 999     int syUnits = 0;
1000     if (ppuY != 0)
1001         syUnits = sy/ppuY;
1002
1003     wxRect rect = line->GetRect();
1004
1005     bool scrolled = false;
1006
1007     wxSize clientSize = GetClientSize();
1008
1009     // Going down
1010     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1011         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_DOWN ||
1012         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1013         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1014     {
1015         if ((rect.y + rect.height) > (clientSize.y + startY))
1016         {
1017             // Make it scroll so this item is at the bottom
1018             // of the window
1019             int y = rect.y - (clientSize.y - rect.height);
1020             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1021
1022             // If we're still off the screen, scroll another line down
1023             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1024                 yUnits ++;
1025
1026             if (startYUnits != yUnits)
1027             {
1028                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1029                 scrolled = true;
1030             }
1031         }
1032         else if (rect.y < startY)
1033         {
1034             // Make it scroll so this item is at the top
1035             // of the window
1036             int y = rect.y ;
1037             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1038
1039             if (startYUnits != yUnits)
1040             {
1041                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1042                 scrolled = true;
1043             }
1044         }
1045     }
1046     // Going up
1047     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1048              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1049              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1050              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1051     {
1052         if (rect.y < startY)
1053         {
1054             // Make it scroll so this item is at the top
1055             // of the window
1056             int y = rect.y ;
1057             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1058
1059             if (startYUnits != yUnits)
1060             {
1061                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1062                 scrolled = true;
1063             }
1064         }
1065         else if ((rect.y + rect.height) > (clientSize.y + startY))
1066         {
1067             // Make it scroll so this item is at the bottom
1068             // of the window
1069             int y = rect.y - (clientSize.y - rect.height);
1070             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1071
1072             // If we're still off the screen, scroll another line down
1073             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1074                 yUnits ++;
1075
1076             if (startYUnits != yUnits)
1077             {
1078                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1079                 scrolled = true;
1080             }
1081         }
1082     }
1083     PositionCaret();
1084
1085     return scrolled;
1086 }
1087
1088 /// Is the given position visible on the screen?
1089 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1090 {
1091     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1092
1093     if (!line)
1094         return false;
1095
1096     int ppuX, ppuY;
1097     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1098
1099     int startX, startY;
1100     GetViewStart(& startX, & startY);
1101     startX = 0;
1102     startY = startY * ppuY;
1103
1104     int sx = 0, sy = 0;
1105     GetVirtualSize(& sx, & sy);
1106     sx = 0;
1107     if (ppuY != 0)
1108         sy = sy/ppuY;
1109
1110     wxRect rect = line->GetRect();
1111
1112     wxSize clientSize = GetClientSize();
1113
1114     return !(((rect.y + rect.height) > (clientSize.y + startY)) || rect.y < startY);
1115 }
1116
1117 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1118 {
1119     m_caretPosition = position;
1120     m_caretAtLineStart = showAtLineStart;
1121 }
1122
1123 /// Move caret one visual step forward: this may mean setting a flag
1124 /// and keeping the same position if we're going from the end of one line
1125 /// to the start of the next, which may be the exact same caret position.
1126 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1127 {
1128     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1129
1130     // Only do the check if we're not at the end of the paragraph (where things work OK
1131     // anyway)
1132     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1133     {
1134         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1135
1136         if (line)
1137         {
1138             wxRichTextRange lineRange = line->GetAbsoluteRange();
1139
1140             // We're at the end of a line. See whether we need to
1141             // stay at the same actual caret position but change visual
1142             // position, or not.
1143             if (oldPosition == lineRange.GetEnd())
1144             {
1145                 if (m_caretAtLineStart)
1146                 {
1147                     // We're already at the start of the line, so actually move on now.
1148                     m_caretPosition = oldPosition + 1;
1149                     m_caretAtLineStart = false;
1150                 }
1151                 else
1152                 {
1153                     // We're showing at the end of the line, so keep to
1154                     // the same position but indicate that we're to show
1155                     // at the start of the next line.
1156                     m_caretPosition = oldPosition;
1157                     m_caretAtLineStart = true;
1158                 }
1159                 SetDefaultStyleToCursorStyle();
1160                 return;
1161             }
1162         }
1163     }
1164     m_caretPosition ++;
1165     SetDefaultStyleToCursorStyle();
1166 }
1167
1168 /// Move caret one visual step backward: this may mean setting a flag
1169 /// and keeping the same position if we're going from the end of one line
1170 /// to the start of the next, which may be the exact same caret position.
1171 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1172 {
1173     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1174
1175     // Only do the check if we're not at the start of the paragraph (where things work OK
1176     // anyway)
1177     if (para && (oldPosition != para->GetRange().GetStart()))
1178     {
1179         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1180
1181         if (line)
1182         {
1183             wxRichTextRange lineRange = line->GetAbsoluteRange();
1184
1185             // We're at the start of a line. See whether we need to
1186             // stay at the same actual caret position but change visual
1187             // position, or not.
1188             if (oldPosition == lineRange.GetStart())
1189             {
1190                 m_caretPosition = oldPosition-1;
1191                 m_caretAtLineStart = true;
1192                 return;
1193             }
1194             else if (oldPosition == lineRange.GetEnd())
1195             {
1196                 if (m_caretAtLineStart)
1197                 {
1198                     // We're at the start of the line, so keep the same caret position
1199                     // but clear the start-of-line flag.
1200                     m_caretPosition = oldPosition;
1201                     m_caretAtLineStart = false;
1202                 }
1203                 else
1204                 {
1205                     // We're showing at the end of the line, so go back
1206                     // to the previous character position.
1207                     m_caretPosition = oldPosition - 1;
1208                 }
1209                 SetDefaultStyleToCursorStyle();
1210                 return;
1211             }
1212         }
1213     }
1214     m_caretPosition --;
1215     SetDefaultStyleToCursorStyle();
1216 }
1217
1218 /// Move right
1219 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1220 {
1221     long endPos = GetBuffer().GetRange().GetEnd();
1222
1223     if (m_caretPosition + noPositions < endPos)
1224     {
1225         long oldPos = m_caretPosition;
1226         long newPos = m_caretPosition + noPositions;
1227
1228         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1229         if (!extendSel)
1230             SelectNone();
1231
1232         // Determine by looking at oldPos and m_caretPosition whether
1233         // we moved from the end of a line to the start of the next line, in which case
1234         // we want to adjust the caret position such that it is positioned at the
1235         // start of the next line, rather than jumping past the first character of the
1236         // line.
1237         if (noPositions == 1 && !extendSel)
1238             MoveCaretForward(oldPos);
1239         else
1240             SetCaretPosition(newPos);
1241
1242         PositionCaret();
1243         SetDefaultStyleToCursorStyle();
1244
1245         if (extendSel)
1246             Refresh(false);
1247         return true;
1248     }
1249     else
1250         return false;
1251 }
1252
1253 /// Move left
1254 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1255 {
1256     long startPos = -1;
1257
1258     if (m_caretPosition > startPos - noPositions + 1)
1259     {
1260         long oldPos = m_caretPosition;
1261         long newPos = m_caretPosition - noPositions;
1262         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1263         if (!extendSel)
1264             SelectNone();
1265
1266         if (noPositions == 1 && !extendSel)
1267             MoveCaretBack(oldPos);
1268         else
1269             SetCaretPosition(newPos);
1270
1271         PositionCaret();
1272         SetDefaultStyleToCursorStyle();
1273
1274         if (extendSel)
1275             Refresh(false);
1276         return true;
1277     }
1278     else
1279         return false;
1280 }
1281
1282 /// Move up
1283 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1284 {
1285     return MoveDown(- noLines, flags);
1286 }
1287
1288 /// Move up
1289 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1290 {
1291     if (!GetCaret())
1292         return false;
1293
1294     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1295     wxPoint pt = GetCaret()->GetPosition();
1296     long newLine = lineNumber + noLines;
1297
1298     if (lineNumber != -1)
1299     {
1300         if (noLines > 0)
1301         {
1302             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1303
1304             if (newLine > lastLine)
1305                 return false;
1306         }
1307         else
1308         {
1309             if (newLine < 0)
1310                 return false;
1311         }
1312     }
1313
1314     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1315     if (lineObj)
1316     {
1317         pt.y = lineObj->GetAbsolutePosition().y + 2;
1318     }
1319     else
1320         return false;
1321
1322     long newPos = 0;
1323     wxClientDC dc(this);
1324     PrepareDC(dc);
1325     dc.SetFont(GetFont());
1326
1327     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1328
1329     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1330     {
1331         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1332         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1333         // so we view the caret at the start of the line.
1334         bool caretLineStart = false;
1335         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1336         {
1337             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1338             wxRichTextRange lineRange;
1339             if (thisLine)
1340                 lineRange = thisLine->GetAbsoluteRange();
1341
1342             if (thisLine && (newPos-1) == lineRange.GetEnd())
1343             {
1344                 newPos --;
1345                 caretLineStart = true;
1346             }
1347             else
1348             {
1349                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1350                 if (para && para->GetRange().GetStart() == newPos)
1351                     newPos --;
1352             }
1353         }
1354
1355         long newSelEnd = newPos;
1356
1357         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1358         if (!extendSel)
1359             SelectNone();
1360
1361         SetCaretPosition(newPos, caretLineStart);
1362         PositionCaret();
1363         SetDefaultStyleToCursorStyle();
1364
1365         if (extendSel)
1366             Refresh(false);
1367         return true;
1368     }
1369
1370     return false;
1371 }
1372
1373 /// Move to the end of the paragraph
1374 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1375 {
1376     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1377     if (para)
1378     {
1379         long newPos = para->GetRange().GetEnd() - 1;
1380         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1381         if (!extendSel)
1382             SelectNone();
1383
1384         SetCaretPosition(newPos);
1385         PositionCaret();
1386         SetDefaultStyleToCursorStyle();
1387
1388         if (extendSel)
1389             Refresh(false);
1390         return true;
1391     }
1392
1393     return false;
1394 }
1395
1396 /// Move to the start of the paragraph
1397 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1398 {
1399     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1400     if (para)
1401     {
1402         long newPos = para->GetRange().GetStart() - 1;
1403         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1404         if (!extendSel)
1405             SelectNone();
1406
1407         SetCaretPosition(newPos);
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 end of the line
1420 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1421 {
1422     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1423
1424     if (line)
1425     {
1426         wxRichTextRange lineRange = line->GetAbsoluteRange();
1427         long newPos = lineRange.GetEnd();
1428         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1429         if (!extendSel)
1430             SelectNone();
1431
1432         SetCaretPosition(newPos);
1433         PositionCaret();
1434         SetDefaultStyleToCursorStyle();
1435
1436         if (extendSel)
1437             Refresh(false);
1438         return true;
1439     }
1440
1441     return false;
1442 }
1443
1444 /// Move to the start of the line
1445 bool wxRichTextCtrl::MoveToLineStart(int flags)
1446 {
1447     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1448     if (line)
1449     {
1450         wxRichTextRange lineRange = line->GetAbsoluteRange();
1451         long newPos = lineRange.GetStart()-1;
1452
1453         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1454         if (!extendSel)
1455             SelectNone();
1456
1457         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1458
1459         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1460         PositionCaret();
1461         SetDefaultStyleToCursorStyle();
1462
1463         if (extendSel)
1464             Refresh(false);
1465         return true;
1466     }
1467
1468     return false;
1469 }
1470
1471 /// Move to the start of the buffer
1472 bool wxRichTextCtrl::MoveHome(int flags)
1473 {
1474     if (m_caretPosition != -1)
1475     {
1476         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1477         if (!extendSel)
1478             SelectNone();
1479
1480         SetCaretPosition(-1);
1481         PositionCaret();
1482         SetDefaultStyleToCursorStyle();
1483
1484         if (extendSel)
1485             Refresh(false);
1486         return true;
1487     }
1488     else
1489         return false;
1490 }
1491
1492 /// Move to the end of the buffer
1493 bool wxRichTextCtrl::MoveEnd(int flags)
1494 {
1495     long endPos = GetBuffer().GetRange().GetEnd()-1;
1496
1497     if (m_caretPosition != endPos)
1498     {
1499         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1500         if (!extendSel)
1501             SelectNone();
1502
1503         SetCaretPosition(endPos);
1504         PositionCaret();
1505         SetDefaultStyleToCursorStyle();
1506
1507         if (extendSel)
1508             Refresh(false);
1509         return true;
1510     }
1511     else
1512         return false;
1513 }
1514
1515 /// Move noPages pages up
1516 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1517 {
1518     return PageDown(- noPages, flags);
1519 }
1520
1521 /// Move noPages pages down
1522 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1523 {
1524     // Calculate which line occurs noPages * screen height further down.
1525     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1526     if (line)
1527     {
1528         wxSize clientSize = GetClientSize();
1529         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1530
1531         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1532         if (newLine)
1533         {
1534             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1535             long pos = lineRange.GetStart()-1;
1536             if (pos != m_caretPosition)
1537             {
1538                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1539
1540                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1541                 if (!extendSel)
1542                     SelectNone();
1543
1544                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1545                 PositionCaret();
1546                 SetDefaultStyleToCursorStyle();
1547
1548                 if (extendSel)
1549                     Refresh(false);
1550                 return true;
1551             }
1552         }
1553     }
1554
1555     return false;
1556 }
1557
1558 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1559 {
1560     return str == wxT(" ") || str == wxT("\t");
1561 }
1562
1563 // Finds the caret position for the next word
1564 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1565 {
1566     long endPos = GetBuffer().GetRange().GetEnd();
1567
1568     if (direction > 0)
1569     {
1570         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1571
1572         // First skip current text to space
1573         while (i < endPos && i > -1)
1574         {
1575             // i is in character, not caret positions
1576             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1577             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1578             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1579             {
1580                 break;
1581             }
1582             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1583                 i += direction;
1584             else
1585             {
1586                 break;
1587             }
1588         }
1589         while (i < endPos && i > -1)
1590         {
1591             // i is in character, not caret positions
1592             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1593             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1594             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1595                 return wxMax(-1, i);
1596
1597             if (text.empty()) // End of paragraph, or maybe an image
1598                 return wxMax(-1, i - 1);
1599             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1600                 i += direction;
1601             else
1602             {
1603                 // Convert to caret position
1604                 return wxMax(-1, i - 1);
1605             }
1606         }
1607         if (i >= endPos)
1608             return endPos-1;
1609         return i-1;
1610     }
1611     else
1612     {
1613         long i = m_caretPosition;
1614
1615         // First skip white space
1616         while (i < endPos && i > -1)
1617         {
1618             // i is in character, not caret positions
1619             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1620             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1621
1622             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1623                 break;
1624             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1625                 i += direction;
1626             else
1627                 break;
1628         }
1629         // Next skip current text to space
1630         while (i < endPos && i > -1)
1631         {
1632             // i is in character, not caret positions
1633             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1634             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1635             if (line && line->GetAbsoluteRange().GetStart() == i)
1636                 return i-1;
1637
1638             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1639                 i += direction;
1640             else
1641             {
1642                 return i;
1643             }
1644         }
1645         if (i < -1)
1646             return -1;
1647         return i;
1648     }
1649 }
1650
1651 /// Move n words left
1652 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1653 {
1654     long pos = FindNextWordPosition(-1);
1655     if (pos != m_caretPosition)
1656     {
1657         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1658
1659         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1660         if (!extendSel)
1661             SelectNone();
1662
1663         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1664         PositionCaret();
1665         SetDefaultStyleToCursorStyle();
1666
1667         if (extendSel)
1668             Refresh(false);
1669         return true;
1670     }
1671
1672     return false;
1673 }
1674
1675 /// Move n words right
1676 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1677 {
1678     long pos = FindNextWordPosition(1);
1679     if (pos != m_caretPosition)
1680     {
1681         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1682
1683         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1684         if (!extendSel)
1685             SelectNone();
1686
1687         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1688         PositionCaret();
1689         SetDefaultStyleToCursorStyle();
1690
1691         if (extendSel)
1692             Refresh(false);
1693         return true;
1694     }
1695
1696     return false;
1697 }
1698
1699 /// Sizing
1700 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1701 {
1702     // Only do sizing optimization for large buffers
1703     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1704     {
1705         m_fullLayoutRequired = true;
1706         m_fullLayoutTime = wxGetLocalTimeMillis();
1707         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1708         LayoutContent(true /* onlyVisibleRect */);
1709     }
1710     else
1711         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1712
1713 #if wxRICHTEXT_BUFFERED_PAINTING
1714     RecreateBuffer();
1715 #endif
1716
1717     event.Skip();
1718 }
1719
1720
1721 /// Idle-time processing
1722 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1723 {
1724     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1725
1726     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1727     {
1728         m_fullLayoutRequired = false;
1729         m_fullLayoutTime = 0;
1730         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1731         ShowPosition(m_fullLayoutSavedPosition);
1732         Refresh(false);
1733     }
1734
1735     if (m_caretPositionForDefaultStyle != -2)
1736     {
1737         // If the caret position has changed, no longer reflect the default style
1738         // in the UI.
1739         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1740             m_caretPositionForDefaultStyle = -2;
1741     }
1742
1743     event.Skip();
1744 }
1745
1746 /// Scrolling
1747 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1748 {
1749     // Not used
1750     event.Skip();
1751 }
1752
1753 /// Set up scrollbars, e.g. after a resize
1754 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1755 {
1756     if (m_freezeCount)
1757         return;
1758
1759     if (GetBuffer().IsEmpty())
1760     {
1761         SetScrollbars(0, 0, 0, 0, 0, 0);
1762         return;
1763     }
1764
1765     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1766     // of pixels. See e.g. wxVScrolledWindow for ideas.
1767     int pixelsPerUnit = 5;
1768     wxSize clientSize = GetClientSize();
1769
1770     int maxHeight = GetBuffer().GetCachedSize().y;
1771
1772     // Round up so we have at least maxHeight pixels
1773     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1774
1775     int startX = 0, startY = 0;
1776     if (!atTop)
1777         GetViewStart(& startX, & startY);
1778
1779     int maxPositionX = 0; // wxMax(sz.x - clientSize.x, 0);
1780     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
1781
1782     // Move to previous scroll position if
1783     // possible
1784     SetScrollbars(0, pixelsPerUnit,
1785         0, unitsY,
1786         wxMin(maxPositionX, startX), wxMin(maxPositionY, startY));
1787 }
1788
1789 /// Paint the background
1790 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1791 {
1792     wxColour backgroundColour = GetBackgroundColour();
1793     if (!backgroundColour.Ok())
1794         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1795
1796     // Clear the background
1797     dc.SetBrush(wxBrush(backgroundColour));
1798     dc.SetPen(*wxTRANSPARENT_PEN);
1799     wxRect windowRect(GetClientSize());
1800     windowRect.x -= 2; windowRect.y -= 2;
1801     windowRect.width += 4; windowRect.height += 4;
1802
1803     // We need to shift the rectangle to take into account
1804     // scrolling. Converting device to logical coordinates.
1805     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1806     dc.DrawRectangle(windowRect);
1807 }
1808
1809 #if wxRICHTEXT_BUFFERED_PAINTING
1810 /// Recreate buffer bitmap if necessary
1811 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1812 {
1813     wxSize sz = size;
1814     if (sz == wxDefaultSize)
1815         sz = GetClientSize();
1816
1817     if (sz.x < 1 || sz.y < 1)
1818         return false;
1819
1820     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1821         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1822     return m_bufferBitmap.Ok();
1823 }
1824 #endif
1825
1826 // ----------------------------------------------------------------------------
1827 // file IO functions
1828 // ----------------------------------------------------------------------------
1829
1830 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
1831 {
1832     bool success = GetBuffer().LoadFile(filename, fileType);
1833     if (success)
1834         m_filename = filename;
1835
1836     DiscardEdits();
1837     SetInsertionPoint(0);
1838     LayoutContent();
1839     PositionCaret();
1840     SetupScrollbars(true);
1841     Refresh(false);
1842     SendTextUpdatedEvent();
1843
1844     if (success)
1845         return true;
1846     else
1847     {
1848         wxLogError(_("File couldn't be loaded."));
1849
1850         return false;
1851     }
1852 }
1853
1854 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
1855 {
1856     if (GetBuffer().SaveFile(filename, fileType))
1857     {
1858         m_filename = filename;
1859
1860         DiscardEdits();
1861
1862         return true;
1863     }
1864
1865     wxLogError(_("The text couldn't be saved."));
1866
1867     return false;
1868 }
1869
1870 // ----------------------------------------------------------------------------
1871 // wxRichTextCtrl specific functionality
1872 // ----------------------------------------------------------------------------
1873
1874 /// Add a new paragraph of text to the end of the buffer
1875 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
1876 {
1877     return GetBuffer().AddParagraph(text);
1878 }
1879
1880 /// Add an image
1881 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
1882 {
1883     return GetBuffer().AddImage(image);
1884 }
1885
1886 // ----------------------------------------------------------------------------
1887 // selection and ranges
1888 // ----------------------------------------------------------------------------
1889
1890 void wxRichTextCtrl::SelectAll()
1891 {
1892     SetSelection(0, GetLastPosition()+1);
1893     m_selectionAnchor = -1;
1894 }
1895
1896 /// Select none
1897 void wxRichTextCtrl::SelectNone()
1898 {
1899     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
1900         SetSelection(-2, -2);
1901     m_selectionAnchor = -2;
1902 }
1903
1904 static bool wxIsWordDelimiter(const wxString& text)
1905 {
1906     return !text.IsEmpty() && !wxIsalnum(text[0]);
1907 }
1908
1909 /// Select the word at the given character position
1910 bool wxRichTextCtrl::SelectWord(long position)
1911 {
1912     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
1913         return false;
1914
1915     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
1916     if (!para)
1917         return false;
1918
1919     long positionStart = position;
1920     long positionEnd = position;
1921
1922     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
1923     {
1924         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
1925         if (wxIsWordDelimiter(text))
1926         {
1927             positionStart ++;
1928             break;
1929         }
1930     }
1931     if (positionStart < para->GetRange().GetStart())
1932         positionStart = para->GetRange().GetStart();
1933
1934     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
1935     {
1936         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
1937         if (wxIsWordDelimiter(text))
1938         {
1939             positionEnd --;
1940             break;
1941         }
1942     }
1943     if (positionEnd >= para->GetRange().GetEnd())
1944         positionEnd = para->GetRange().GetEnd();
1945
1946     SetSelection(positionStart, positionEnd+1);
1947
1948     if (positionStart >= 0)
1949     {
1950         MoveCaret(positionStart-1, true);
1951         SetDefaultStyleToCursorStyle();
1952     }
1953
1954     return true;
1955 }
1956
1957 wxString wxRichTextCtrl::GetStringSelection() const
1958 {
1959     long from, to;
1960     GetSelection(&from, &to);
1961
1962     return GetRange(from, to);
1963 }
1964
1965 // ----------------------------------------------------------------------------
1966 // hit testing
1967 // ----------------------------------------------------------------------------
1968
1969 wxTextCtrlHitTestResult
1970 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
1971 {
1972     // implement in terms of the other overload as the native ports typically
1973     // can get the position and not (x, y) pair directly (although wxUniv
1974     // directly gets x and y -- and so overrides this method as well)
1975     long pos;
1976     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
1977
1978     if ( rc != wxTE_HT_UNKNOWN )
1979     {
1980         PositionToXY(pos, x, y);
1981     }
1982
1983     return rc;
1984 }
1985
1986 wxTextCtrlHitTestResult
1987 wxRichTextCtrl::HitTest(const wxPoint& pt,
1988                         long * pos) const
1989 {
1990     wxClientDC dc((wxRichTextCtrl*) this);
1991     ((wxRichTextCtrl*)this)->PrepareDC(dc);
1992
1993     // Buffer uses logical position (relative to start of buffer)
1994     // so convert
1995     wxPoint pt2 = GetLogicalPoint(pt);
1996
1997     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
1998
1999     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2000         return wxTE_HT_BEFORE;
2001     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2002         return wxTE_HT_BEYOND;
2003     else if (hit & wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER)
2004         return wxTE_HT_ON_TEXT;
2005
2006     return wxTE_HT_UNKNOWN;
2007 }
2008
2009 // ----------------------------------------------------------------------------
2010 // set/get the controls text
2011 // ----------------------------------------------------------------------------
2012
2013 wxString wxRichTextCtrl::GetValue() const
2014 {
2015     return GetBuffer().GetText();
2016 }
2017
2018 wxString wxRichTextCtrl::GetRange(long from, long to) const
2019 {
2020     // Public API for range is different from internals
2021     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2022 }
2023
2024 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2025 {
2026     Clear();
2027
2028     // if the text is long enough, it's faster to just set it instead of first
2029     // comparing it with the old one (chances are that it will be different
2030     // anyhow, this comparison is there to avoid flicker for small single-line
2031     // edit controls mostly)
2032     if ( (value.length() > 0x400) || (value != GetValue()) )
2033     {
2034         DoWriteText(value);
2035
2036         // for compatibility, don't move the cursor when doing SetValue()
2037         SetInsertionPoint(0);
2038     }
2039     else // same text
2040     {
2041         if ( flags & SetValue_SendEvent )
2042         {
2043             // still send an event for consistency
2044             SendTextUpdatedEvent();
2045         }
2046     }
2047
2048     // we should reset the modified flag even if the value didn't really change
2049
2050     // mark the control as being not dirty - we changed its text, not the
2051     // user
2052     DiscardEdits();
2053 }
2054
2055 void wxRichTextCtrl::WriteText(const wxString& value)
2056 {
2057     DoWriteText(value);
2058 }
2059
2060 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2061 {
2062     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2063
2064     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2065
2066     if ( flags & SetValue_SendEvent )
2067         SendTextUpdatedEvent();
2068 }
2069
2070 void wxRichTextCtrl::AppendText(const wxString& text)
2071 {
2072     SetInsertionPointEnd();
2073
2074     WriteText(text);
2075 }
2076
2077 /// Write an image at the current insertion point
2078 bool wxRichTextCtrl::WriteImage(const wxImage& image, int bitmapType)
2079 {
2080     wxRichTextImageBlock imageBlock;
2081
2082     wxImage image2 = image;
2083     if (imageBlock.MakeImageBlock(image2, bitmapType))
2084         return WriteImage(imageBlock);
2085
2086     return false;
2087 }
2088
2089 bool wxRichTextCtrl::WriteImage(const wxString& filename, int bitmapType)
2090 {
2091     wxRichTextImageBlock imageBlock;
2092
2093     wxImage image;
2094     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2095         return WriteImage(imageBlock);
2096
2097     return false;
2098 }
2099
2100 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2101 {
2102     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2103 }
2104
2105 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, int bitmapType)
2106 {
2107     if (bitmap.Ok())
2108     {
2109         wxRichTextImageBlock imageBlock;
2110
2111         wxImage image = bitmap.ConvertToImage();
2112         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2113             return WriteImage(imageBlock);
2114     }
2115
2116     return false;
2117 }
2118
2119 /// Insert a newline (actually paragraph) at the current insertion point.
2120 bool wxRichTextCtrl::Newline()
2121 {
2122     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
2123 }
2124
2125 /// Insert a line break at the current insertion point.
2126 bool wxRichTextCtrl::LineBreak()
2127 {
2128     wxString text;
2129     text = wxRichTextLineBreakChar;
2130     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2131 }
2132
2133 // ----------------------------------------------------------------------------
2134 // Clipboard operations
2135 // ----------------------------------------------------------------------------
2136
2137 void wxRichTextCtrl::Copy()
2138 {
2139     if (CanCopy())
2140     {
2141         wxRichTextRange range = GetInternalSelectionRange();
2142         GetBuffer().CopyToClipboard(range);
2143     }
2144 }
2145
2146 void wxRichTextCtrl::Cut()
2147 {
2148     if (CanCut())
2149     {
2150         wxRichTextRange range = GetInternalSelectionRange();
2151         GetBuffer().CopyToClipboard(range);
2152
2153         DeleteSelectedContent();
2154         LayoutContent();
2155         Refresh(false);
2156     }
2157 }
2158
2159 void wxRichTextCtrl::Paste()
2160 {
2161     if (CanPaste())
2162     {
2163         BeginBatchUndo(_("Paste"));
2164
2165         long newPos = m_caretPosition;
2166         DeleteSelectedContent(& newPos);
2167
2168         GetBuffer().PasteFromClipboard(newPos);
2169
2170         EndBatchUndo();
2171     }
2172 }
2173
2174 void wxRichTextCtrl::DeleteSelection()
2175 {
2176     if (CanDeleteSelection())
2177     {
2178         DeleteSelectedContent();
2179     }
2180 }
2181
2182 bool wxRichTextCtrl::HasSelection() const
2183 {
2184     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2185 }
2186
2187 bool wxRichTextCtrl::CanCopy() const
2188 {
2189     // Can copy if there's a selection
2190     return HasSelection();
2191 }
2192
2193 bool wxRichTextCtrl::CanCut() const
2194 {
2195     return HasSelection() && IsEditable();
2196 }
2197
2198 bool wxRichTextCtrl::CanPaste() const
2199 {
2200     if ( !IsEditable() )
2201         return false;
2202
2203     return GetBuffer().CanPasteFromClipboard();
2204 }
2205
2206 bool wxRichTextCtrl::CanDeleteSelection() const
2207 {
2208     return HasSelection() && IsEditable();
2209 }
2210
2211
2212 // ----------------------------------------------------------------------------
2213 // Accessors
2214 // ----------------------------------------------------------------------------
2215
2216 void wxRichTextCtrl::SetEditable(bool editable)
2217 {
2218     m_editable = editable;
2219 }
2220
2221 void wxRichTextCtrl::SetInsertionPoint(long pos)
2222 {
2223     SelectNone();
2224
2225     m_caretPosition = pos - 1;
2226 }
2227
2228 void wxRichTextCtrl::SetInsertionPointEnd()
2229 {
2230     long pos = GetLastPosition();
2231     SetInsertionPoint(pos);
2232 }
2233
2234 long wxRichTextCtrl::GetInsertionPoint() const
2235 {
2236     return m_caretPosition+1;
2237 }
2238
2239 wxTextPos wxRichTextCtrl::GetLastPosition() const
2240 {
2241     return GetBuffer().GetRange().GetEnd();
2242 }
2243
2244 // If the return values from and to are the same, there is no
2245 // selection.
2246 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2247 {
2248     *from = m_selectionRange.GetStart();
2249     *to = m_selectionRange.GetEnd();
2250     if ((*to) != -1 && (*to) != -2)
2251         (*to) ++;
2252 }
2253
2254 bool wxRichTextCtrl::IsEditable() const
2255 {
2256     return m_editable;
2257 }
2258
2259 // ----------------------------------------------------------------------------
2260 // selection
2261 // ----------------------------------------------------------------------------
2262
2263 void wxRichTextCtrl::SetSelection(long from, long to)
2264 {
2265     // if from and to are both -1, it means (in wxWidgets) that all text should
2266     // be selected.
2267     if ( (from == -1) && (to == -1) )
2268     {
2269         from = 0;
2270         to = GetLastPosition()+1;
2271     }
2272
2273     DoSetSelection(from, to);
2274 }
2275
2276 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2277 {
2278     m_selectionAnchor = from;
2279     m_selectionRange.SetRange(from, to-1);
2280     if (from > -2)
2281         m_caretPosition = from-1;
2282
2283     Refresh(false);
2284     PositionCaret();
2285 }
2286
2287 // ----------------------------------------------------------------------------
2288 // Editing
2289 // ----------------------------------------------------------------------------
2290
2291 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2292                              const wxString& value)
2293 {
2294     BeginBatchUndo(_("Replace"));
2295
2296     DeleteSelectedContent();
2297
2298     DoWriteText(value, SetValue_SelectionOnly);
2299
2300     EndBatchUndo();
2301 }
2302
2303 void wxRichTextCtrl::Remove(long from, long to)
2304 {
2305     SelectNone();
2306
2307     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to), this);
2308
2309     LayoutContent();
2310     if (!IsFrozen())
2311         Refresh(false);
2312 }
2313
2314 bool wxRichTextCtrl::IsModified() const
2315 {
2316     return m_buffer.IsModified();
2317 }
2318
2319 void wxRichTextCtrl::MarkDirty()
2320 {
2321     m_buffer.Modify(true);
2322 }
2323
2324 void wxRichTextCtrl::DiscardEdits()
2325 {
2326     m_caretPositionForDefaultStyle = -2;
2327     m_buffer.Modify(false);
2328     m_buffer.GetCommandProcessor()->ClearCommands();
2329 }
2330
2331 int wxRichTextCtrl::GetNumberOfLines() const
2332 {
2333     return GetBuffer().GetParagraphCount();
2334 }
2335
2336 // ----------------------------------------------------------------------------
2337 // Positions <-> coords
2338 // ----------------------------------------------------------------------------
2339
2340 long wxRichTextCtrl::XYToPosition(long x, long y) const
2341 {
2342     return GetBuffer().XYToPosition(x, y);
2343 }
2344
2345 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2346 {
2347     return GetBuffer().PositionToXY(pos, x, y);
2348 }
2349
2350 // ----------------------------------------------------------------------------
2351 //
2352 // ----------------------------------------------------------------------------
2353
2354 void wxRichTextCtrl::ShowPosition(long pos)
2355 {
2356     if (!IsPositionVisible(pos))
2357         ScrollIntoView(pos-1, WXK_DOWN);
2358 }
2359
2360 int wxRichTextCtrl::GetLineLength(long lineNo) const
2361 {
2362     return GetBuffer().GetParagraphLength(lineNo);
2363 }
2364
2365 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2366 {
2367     return GetBuffer().GetParagraphText(lineNo);
2368 }
2369
2370 // ----------------------------------------------------------------------------
2371 // Undo/redo
2372 // ----------------------------------------------------------------------------
2373
2374 void wxRichTextCtrl::Undo()
2375 {
2376     if (CanUndo())
2377     {
2378         GetCommandProcessor()->Undo();
2379     }
2380 }
2381
2382 void wxRichTextCtrl::Redo()
2383 {
2384     if (CanRedo())
2385     {
2386         GetCommandProcessor()->Redo();
2387     }
2388 }
2389
2390 bool wxRichTextCtrl::CanUndo() const
2391 {
2392     return GetCommandProcessor()->CanUndo();
2393 }
2394
2395 bool wxRichTextCtrl::CanRedo() const
2396 {
2397     return GetCommandProcessor()->CanRedo();
2398 }
2399
2400 // ----------------------------------------------------------------------------
2401 // implementation details
2402 // ----------------------------------------------------------------------------
2403
2404 void wxRichTextCtrl::Command(wxCommandEvent& event)
2405 {
2406     SetValue(event.GetString());
2407     GetEventHandler()->ProcessEvent(event);
2408 }
2409
2410 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2411 {
2412     // By default, load the first file into the text window.
2413     if (event.GetNumberOfFiles() > 0)
2414     {
2415         LoadFile(event.GetFiles()[0]);
2416     }
2417 }
2418
2419 wxSize wxRichTextCtrl::DoGetBestSize() const
2420 {
2421     return wxSize(10, 10);
2422 }
2423
2424 // ----------------------------------------------------------------------------
2425 // standard handlers for standard edit menu events
2426 // ----------------------------------------------------------------------------
2427
2428 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2429 {
2430     Cut();
2431 }
2432
2433 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2434 {
2435     DeleteSelection();
2436 }
2437
2438 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2439 {
2440     Copy();
2441 }
2442
2443 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2444 {
2445     Paste();
2446 }
2447
2448 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2449 {
2450     Undo();
2451 }
2452
2453 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2454 {
2455     Redo();
2456 }
2457
2458 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2459 {
2460     event.Enable( CanCut() );
2461 }
2462
2463 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2464 {
2465     event.Enable( CanCopy() );
2466 }
2467
2468 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2469 {
2470     event.Enable( CanDeleteSelection() );
2471 }
2472
2473 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2474 {
2475     event.Enable( CanPaste() );
2476 }
2477
2478 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2479 {
2480     event.Enable( CanUndo() );
2481     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2482 }
2483
2484 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2485 {
2486     event.Enable( CanRedo() );
2487     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2488 }
2489
2490 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2491 {
2492     SelectAll();
2493 }
2494
2495 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2496 {
2497     event.Enable(GetLastPosition() > 0);
2498 }
2499
2500 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& WXUNUSED(event))
2501 {
2502     if (!m_contextMenu)
2503     {
2504         m_contextMenu = new wxMenu;
2505         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2506         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2507         m_contextMenu->AppendSeparator();
2508         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2509         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2510         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2511         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2512         m_contextMenu->AppendSeparator();
2513         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2514     }
2515     PopupMenu(m_contextMenu);
2516     return;
2517 }
2518
2519 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttrEx& style)
2520 {
2521     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style);
2522 }
2523
2524 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2525 {
2526     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttrEx(style));
2527 }
2528
2529 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxRichTextAttr& style)
2530 {
2531     return GetBuffer().SetStyle(range.ToInternal(), style);
2532 }
2533
2534 // extended style setting operation with flags including:
2535 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2536 // see richtextbuffer.h for more details.
2537 bool wxRichTextCtrl::SetStyleEx(long start, long end, const wxTextAttrEx& style, int flags)
2538 {
2539     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style, flags);
2540 }
2541
2542 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttrEx& style, int flags)
2543 {
2544     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2545 }
2546
2547 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxRichTextAttr& style, int flags)
2548 {
2549     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2550 }
2551
2552 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttrEx& style)
2553 {
2554     return GetBuffer().SetDefaultStyle(style);
2555 }
2556
2557 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2558 {
2559     return GetBuffer().SetDefaultStyle(wxTextAttrEx(style));
2560 }
2561
2562 const wxTextAttrEx& wxRichTextCtrl::GetDefaultStyleEx() const
2563 {
2564     return GetBuffer().GetDefaultStyle();
2565 }
2566
2567 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2568 {
2569     return GetBuffer().GetDefaultStyle();
2570 }
2571
2572 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2573 {
2574     wxTextAttrEx attr(style);
2575     if (GetBuffer().GetStyle(position, attr))
2576     {
2577         style = attr;
2578         return true;
2579     }
2580     else
2581         return false;
2582 }
2583
2584 bool wxRichTextCtrl::GetStyle(long position, wxTextAttrEx& style)
2585 {
2586     return GetBuffer().GetStyle(position, style);
2587 }
2588
2589 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style)
2590 {
2591     return GetBuffer().GetStyle(position, style);
2592 }
2593
2594 // get the common set of styles for the range
2595 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxRichTextAttr& style)
2596 {
2597     wxTextAttrEx styleEx;
2598     if (GetBuffer().GetStyleForRange(range.ToInternal(), styleEx))
2599     {
2600         style = styleEx;
2601         return true;
2602     }
2603     else
2604         return false;
2605 }
2606
2607 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttrEx& style)
2608 {
2609     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2610 }
2611
2612 /// Get the content (uncombined) attributes for this position.
2613
2614 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2615 {
2616     wxTextAttrEx attr(style);
2617     if (GetBuffer().GetUncombinedStyle(position, attr))
2618     {
2619         style = attr;
2620         return true;
2621     }
2622     else
2623         return false;
2624 }
2625
2626 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttrEx& style)
2627 {
2628     return GetBuffer().GetUncombinedStyle(position, style);
2629 }
2630
2631 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style)
2632 {
2633     return GetBuffer().GetUncombinedStyle(position, style);
2634 }
2635
2636 /// Set font, and also the buffer attributes
2637 bool wxRichTextCtrl::SetFont(const wxFont& font)
2638 {
2639     wxControl::SetFont(font);
2640
2641     wxTextAttrEx attr = GetBuffer().GetAttributes();
2642     attr.SetFont(font);
2643     GetBuffer().SetBasicStyle(attr);
2644
2645     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2646     Refresh(false);
2647
2648     return true;
2649 }
2650
2651 /// Transform logical to physical
2652 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2653 {
2654     wxPoint pt;
2655     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2656
2657     return pt;
2658 }
2659
2660 /// Transform physical to logical
2661 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2662 {
2663     wxPoint pt;
2664     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2665
2666     return pt;
2667 }
2668
2669 /// Position the caret
2670 void wxRichTextCtrl::PositionCaret()
2671 {
2672     if (!GetCaret())
2673         return;
2674
2675     //wxLogDebug(wxT("PositionCaret"));
2676
2677     wxRect caretRect;
2678     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2679     {
2680         wxPoint originalPt = caretRect.GetPosition();
2681         wxPoint pt = GetPhysicalPoint(originalPt);
2682         if (GetCaret()->GetPosition() != pt)
2683         {
2684             GetCaret()->Move(pt);
2685             GetCaret()->SetSize(caretRect.GetSize());
2686         }
2687     }
2688 }
2689
2690 /// Get the caret height and position for the given character position
2691 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2692 {
2693     wxClientDC dc(this);
2694     dc.SetFont(GetFont());
2695
2696     PrepareDC(dc);
2697
2698     wxPoint pt;
2699     int height = 0;
2700
2701     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2702     {
2703         // Caret height can't be zero
2704         if (height == 0)
2705             height = dc.GetCharHeight();
2706
2707         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2708         return true;
2709     }
2710
2711     return false;
2712 }
2713
2714 /// Gets the line for the visible caret position. If the caret is
2715 /// shown at the very end of the line, it means the next character is actually
2716 /// on the following line. So let's get the line we're expecting to find
2717 /// if this is the case.
2718 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2719 {
2720     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2721     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2722     if (line)
2723     {
2724         wxRichTextRange lineRange = line->GetAbsoluteRange();
2725         if (caretPosition == lineRange.GetStart()-1 &&
2726             (para->GetRange().GetStart() != lineRange.GetStart()))
2727         {
2728             if (!m_caretAtLineStart)
2729                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2730         }
2731     }
2732     return line;
2733 }
2734
2735
2736 /// Move the caret to the given character position
2737 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2738 {
2739     if (GetBuffer().GetDirty())
2740         LayoutContent();
2741
2742     if (pos <= GetBuffer().GetRange().GetEnd())
2743     {
2744         SetCaretPosition(pos, showAtLineStart);
2745
2746         PositionCaret();
2747
2748         return true;
2749     }
2750     else
2751         return false;
2752 }
2753
2754 /// Layout the buffer: which we must do before certain operations, such as
2755 /// setting the caret position.
2756 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2757 {
2758     if (GetBuffer().GetDirty() || onlyVisibleRect)
2759     {
2760         wxRect availableSpace(GetClientSize());
2761         if (availableSpace.width == 0)
2762             availableSpace.width = 10;
2763         if (availableSpace.height == 0)
2764             availableSpace.height = 10;
2765
2766         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2767         if (onlyVisibleRect)
2768         {
2769             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2770             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2771         }
2772
2773         wxClientDC dc(this);
2774         dc.SetFont(GetFont());
2775
2776         PrepareDC(dc);
2777
2778         GetBuffer().Defragment();
2779         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2780         GetBuffer().Layout(dc, availableSpace, flags);
2781         GetBuffer().SetDirty(false);
2782
2783         if (!IsFrozen())
2784             SetupScrollbars();
2785     }
2786
2787     return true;
2788 }
2789
2790 /// Is all of the selection bold?
2791 bool wxRichTextCtrl::IsSelectionBold()
2792 {
2793     if (HasSelection())
2794     {
2795         wxRichTextAttr attr;
2796         wxRichTextRange range = GetSelectionRange();
2797         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2798         attr.SetFontWeight(wxBOLD);
2799
2800         return HasCharacterAttributes(range, attr);
2801     }
2802     else
2803     {
2804         // If no selection, then we need to combine current style with default style
2805         // to see what the effect would be if we started typing.
2806         wxRichTextAttr attr;
2807         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2808
2809         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2810         if (GetStyle(pos, attr))
2811         {
2812             if (IsDefaultStyleShowing())
2813                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2814             return attr.GetFontWeight() == wxBOLD;
2815         }
2816     }
2817     return false;
2818 }
2819
2820 /// Is all of the selection italics?
2821 bool wxRichTextCtrl::IsSelectionItalics()
2822 {
2823     if (HasSelection())
2824     {
2825         wxRichTextRange range = GetSelectionRange();
2826         wxRichTextAttr attr;
2827         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2828         attr.SetFontStyle(wxITALIC);
2829
2830         return HasCharacterAttributes(range, attr);
2831     }
2832     else
2833     {
2834         // If no selection, then we need to combine current style with default style
2835         // to see what the effect would be if we started typing.
2836         wxRichTextAttr attr;
2837         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2838
2839         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2840         if (GetStyle(pos, attr))
2841         {
2842             if (IsDefaultStyleShowing())
2843                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2844             return attr.GetFontStyle() == wxITALIC;
2845         }
2846     }
2847     return false;
2848 }
2849
2850 /// Is all of the selection underlined?
2851 bool wxRichTextCtrl::IsSelectionUnderlined()
2852 {
2853     if (HasSelection())
2854     {
2855         wxRichTextRange range = GetSelectionRange();
2856         wxRichTextAttr attr;
2857         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2858         attr.SetFontUnderlined(true);
2859
2860         return HasCharacterAttributes(range, attr);
2861     }
2862     else
2863     {
2864         // If no selection, then we need to combine current style with default style
2865         // to see what the effect would be if we started typing.
2866         wxRichTextAttr attr;
2867         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2868         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2869
2870         if (GetStyle(pos, attr))
2871         {
2872             if (IsDefaultStyleShowing())
2873                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2874             return attr.GetFontUnderlined();
2875         }
2876     }
2877     return false;
2878 }
2879
2880 /// Apply bold to the selection
2881 bool wxRichTextCtrl::ApplyBoldToSelection()
2882 {
2883     wxRichTextAttr attr;
2884     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2885     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
2886
2887     if (HasSelection())
2888         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2889     else
2890         SetAndShowDefaultStyle(attr);
2891     return true;
2892 }
2893
2894 /// Apply italic to the selection
2895 bool wxRichTextCtrl::ApplyItalicToSelection()
2896 {
2897     wxRichTextAttr attr;
2898     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2899     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
2900
2901     if (HasSelection())
2902         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2903     else
2904         SetAndShowDefaultStyle(attr);
2905     return true;
2906 }
2907
2908 /// Apply underline to the selection
2909 bool wxRichTextCtrl::ApplyUnderlineToSelection()
2910 {
2911     wxRichTextAttr attr;
2912     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2913     attr.SetFontUnderlined(!IsSelectionUnderlined());
2914
2915     if (HasSelection())
2916         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2917     else
2918         SetAndShowDefaultStyle(attr);
2919     return true;
2920 }
2921
2922 /// Is all of the selection aligned according to the specified flag?
2923 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
2924 {
2925     wxRichTextRange range;
2926     if (HasSelection())
2927         range = GetSelectionRange();
2928     else
2929         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
2930
2931     wxRichTextAttr attr;
2932     attr.SetAlignment(alignment);
2933
2934     return HasParagraphAttributes(range, attr);
2935 }
2936
2937 /// Apply alignment to the selection
2938 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
2939 {
2940     wxRichTextAttr attr;
2941     attr.SetAlignment(alignment);
2942     if (HasSelection())
2943         return SetStyle(GetSelectionRange(), attr);
2944     else
2945     {
2946         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
2947         if (para)
2948             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
2949     }
2950     return true;
2951 }
2952
2953 /// Apply a named style to the selection
2954 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
2955 {
2956     // Flags are defined within each definition, so only certain
2957     // attributes are applied.
2958     wxRichTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
2959
2960     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE;
2961
2962     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
2963     {
2964         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2965
2966         wxRichTextRange range;
2967
2968         if (HasSelection())
2969             range = GetSelectionRange();
2970         else
2971         {
2972             long pos = GetAdjustedCaretPosition(GetCaretPosition());
2973             range = wxRichTextRange(pos, pos+1);
2974         }
2975
2976         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
2977     }
2978
2979     // Make sure the attr has the style name
2980     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
2981     {
2982         attr.SetParagraphStyleName(def->GetName());
2983
2984         // If applying a paragraph style, we only want the paragraph nodes to adopt these
2985         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
2986         // to change its style independently.
2987         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2988     }
2989     else
2990         attr.SetCharacterStyleName(def->GetName());
2991
2992     if (HasSelection())
2993         return SetStyleEx(GetSelectionRange(), attr, flags);
2994     else
2995     {
2996         SetAndShowDefaultStyle(attr);
2997         return true;
2998     }
2999 }
3000
3001 /// Apply the style sheet to the buffer, for example if the styles have changed.
3002 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
3003 {
3004     if (!styleSheet)
3005         styleSheet = GetBuffer().GetStyleSheet();
3006     if (!styleSheet)
3007         return false;
3008
3009     if (GetBuffer().ApplyStyleSheet(styleSheet))
3010     {
3011         GetBuffer().Invalidate(wxRICHTEXT_ALL);
3012         Refresh(false);
3013         return true;
3014     }
3015     else
3016         return false;
3017 }
3018
3019 /// Sets the default style to the style under the cursor
3020 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3021 {
3022     wxTextAttrEx attr;
3023     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3024
3025     // If at the start of a paragraph, use the next position.
3026     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3027
3028     if (GetUncombinedStyle(pos, attr))
3029     {
3030         SetDefaultStyle(attr);
3031         return true;
3032     }
3033
3034     return false;
3035 }
3036
3037 /// Returns the first visible position in the current view
3038 long wxRichTextCtrl::GetFirstVisiblePosition() const
3039 {
3040     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3041     if (line)
3042         return line->GetAbsoluteRange().GetStart();
3043     else
3044         return 0;
3045 }
3046
3047 /// Get the first visible point in the window
3048 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3049 {
3050     int ppuX, ppuY;
3051     int startXUnits, startYUnits;
3052
3053     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3054     GetViewStart(& startXUnits, & startYUnits);
3055
3056     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3057 }
3058
3059 /// The adjusted caret position is the character position adjusted to take
3060 /// into account whether we're at the start of a paragraph, in which case
3061 /// style information should be taken from the next position, not current one.
3062 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3063 {
3064     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3065
3066     if (para && (caretPos+1 == para->GetRange().GetStart()))
3067         caretPos ++;
3068     return caretPos;
3069 }
3070
3071 /// Get/set the selection range in character positions. -1, -1 means no selection.
3072 /// The range is in API convention, i.e. a single character selection is denoted
3073 /// by (n, n+1)
3074 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3075 {
3076     wxRichTextRange range = GetInternalSelectionRange();
3077     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3078         range.SetEnd(range.GetEnd() + 1);
3079     return range;
3080 }
3081
3082 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3083 {
3084     wxRichTextRange range1(range);
3085     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3086         range1.SetEnd(range1.GetEnd() - 1);
3087
3088     wxASSERT( range1.GetStart() > range1.GetEnd() );
3089
3090     SetInternalSelectionRange(range1);
3091 }
3092
3093 /// Set list style
3094 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3095 {
3096     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3097 }
3098
3099 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3100 {
3101     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3102 }
3103
3104 /// Clear list for given range
3105 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3106 {
3107     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3108 }
3109
3110 /// Number/renumber any list elements in the given range
3111 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3112 {
3113     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3114 }
3115
3116 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3117 {
3118     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3119 }
3120
3121 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3122 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3123 {
3124     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3125 }
3126
3127 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3128 {
3129     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3130 }
3131
3132 /// Deletes the content in the given range
3133 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3134 {
3135     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3136 }
3137
3138 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3139 {
3140     if (sm_availableFontNames.GetCount() == 0)
3141     {
3142         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3143         sm_availableFontNames.Sort();
3144     }
3145     return sm_availableFontNames;
3146 }
3147
3148 void wxRichTextCtrl::ClearAvailableFontNames()
3149 {
3150     sm_availableFontNames.Clear();
3151 }
3152
3153 #endif
3154     // wxUSE_RICHTEXT