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_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
  78
  79     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
  80     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
  81
  82     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
  83     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
  84
  85     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
  86     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
  87
  88     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
  89     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
  90
  91     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
  92     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
  93
  94     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
  95     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
  96
  97     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
  98     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
  99 END_EVENT_TABLE()
 100
 101 /*!
 102  * wxRichTextCtrl
 103  */
 104
 105 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 106
 107 wxRichTextCtrl::wxRichTextCtrl()
 108               : wxScrollHelper(this)
 109 {
 110     Init();
 111 }
 112
 113 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 114                                wxWindowID id,
 115                                const wxString& value,
 116                                const wxPoint& pos,
 117                                const wxSize& size,
 118                                long style,
 119                                const wxValidator& validator,
 120                                const wxString& name)
 121               : wxScrollHelper(this)
 122 {
 123     Init();
 124     Create(parent, id, value, pos, size, style, validator, name);
 125 }
 126
 127 /// Creation
 128 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 129                              const wxValidator& validator, const wxString& name)
 130 {
 131     if (!wxTextCtrlBase::Create(parent, id, pos, size,
 132                                 style|wxFULL_REPAINT_ON_RESIZE,
 133                                 validator, name))
 134         return false;
 135
 136     if (!GetFont().Ok())
 137     {
 138         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 139     }
 140
 141     GetBuffer().Reset();
 142     GetBuffer().SetRichTextCtrl(this);
 143
 144     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 145     GetCaret()->Show();
 146
 147     if (style & wxTE_READONLY)
 148         SetEditable(false);
 149
 150     // The base attributes must all have default values
 151     wxTextAttrEx attributes;
 152     attributes.SetFont(GetFont());
 153     attributes.SetTextColour(*wxBLACK);
 154     attributes.SetBackgroundColour(*wxWHITE);
 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 /// Left-click
 329 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 330 {
 331     SetFocus();
 332
 333     wxClientDC dc(this);
 334     PrepareDC(dc);
 335     dc.SetFont(GetFont());
 336
 337     long position = 0;
 338     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 339
 340     if (hit != wxRICHTEXT_HITTEST_NONE)
 341     {
 342         m_dragStart = event.GetLogicalPosition(dc);
 343         m_dragging = true;
 344         CaptureMouse();
 345
 346         SelectNone();
 347
 348         bool caretAtLineStart = false;
 349
 350         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 351         {
 352             // If we're at the start of a line (but not first in para)
 353             // then we should keep the caret showing at the start of the line
 354             // by showing the m_caretAtLineStart flag.
 355             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 356             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 357
 358             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 359                 caretAtLineStart = true;
 360             position --;
 361         }
 362
 363         MoveCaret(position, caretAtLineStart);
 364         SetDefaultStyleToCursorStyle();
 365     }
 366
 367     event.Skip();
 368 }
 369
 370 /// Left-up
 371 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 372 {
 373     if (m_dragging)
 374     {
 375         m_dragging = false;
 376         if (GetCapture() == this)
 377             ReleaseMouse();
 378
 379         // See if we clicked on a URL
 380         wxClientDC dc(this);
 381         PrepareDC(dc);
 382         dc.SetFont(GetFont());
 383
 384         long position = 0;
 385         wxPoint logicalPt = event.GetLogicalPosition(dc);
 386         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 387
 388         if (hit != wxRICHTEXT_HITTEST_NONE)
 389         {
 390             wxTextAttrEx attr;
 391             if (GetStyle(position, attr))
 392             {
 393                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 394                 {
 395                     wxString urlTarget = attr.GetURL();
 396                     if (!urlTarget.IsEmpty())
 397                     {
 398                         wxMouseEvent mouseEvent(event);
 399
 400                         long startPos = 0, endPos = 0;
 401                         wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 402                         if (obj)
 403                         {
 404                             startPos = obj->GetRange().GetStart();
 405                             endPos = obj->GetRange().GetEnd();
 406                         }
 407
 408                         wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 409                         InitCommandEvent(urlEvent);
 410
 411                         urlEvent.SetString(urlTarget);
 412
 413                         GetEventHandler()->ProcessEvent(urlEvent);
 414                     }
 415                 }
 416             }
 417         }
 418     }
 419 }
 420
 421 /// Left-click
 422 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 423 {
 424     wxClientDC dc(this);
 425     PrepareDC(dc);
 426     dc.SetFont(GetFont());
 427
 428     long position = 0;
 429     wxPoint logicalPt = event.GetLogicalPosition(dc);
 430     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 431
 432     // See if we need to change the cursor
 433
 434     {
 435         if (hit != wxRICHTEXT_HITTEST_NONE)
 436         {
 437             wxTextAttrEx attr;
 438             if (GetStyle(position, attr))
 439             {
 440                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 441                 {
 442                     SetCursor(m_urlCursor);
 443                 }
 444                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 445                 {
 446                     SetCursor(m_textCursor);
 447                 }
 448             }
 449         }
 450     }
 451
 452     if (!event.Dragging())
 453     {
 454         event.Skip();
 455         return;
 456     }
 457
 458     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 459     {
 460         // TODO: test closeness
 461
 462         bool caretAtLineStart = false;
 463
 464         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 465         {
 466             // If we're at the start of a line (but not first in para)
 467             // then we should keep the caret showing at the start of the line
 468             // by showing the m_caretAtLineStart flag.
 469             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 470             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 471
 472             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 473                 caretAtLineStart = true;
 474             position --;
 475         }
 476
 477         if (m_caretPosition != position)
 478         {
 479             bool extendSel = ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 480
 481             MoveCaret(position, caretAtLineStart);
 482             SetDefaultStyleToCursorStyle();
 483
 484             if (extendSel)
 485                 Refresh(false);
 486         }
 487     }
 488 }
 489
 490 /// Right-click
 491 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 492 {
 493     SetFocus();
 494     event.Skip();
 495 }
 496
 497 /// Left-double-click
 498 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& event)
 499 {
 500     SelectWord(GetCaretPosition()+1);
 501     event.Skip();
 502 }
 503
 504 /// Middle-click
 505 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 506 {
 507     event.Skip();
 508 }
 509
 510 /// Key press
 511 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 512 {
 513     int flags = 0;
 514     if (event.CmdDown())
 515         flags |= wxRICHTEXT_CTRL_DOWN;
 516     if (event.ShiftDown())
 517         flags |= wxRICHTEXT_SHIFT_DOWN;
 518     if (event.AltDown())
 519         flags |= wxRICHTEXT_ALT_DOWN;
 520
 521     if (event.GetKeyCode() == WXK_LEFT ||
 522         event.GetKeyCode() == WXK_RIGHT ||
 523         event.GetKeyCode() == WXK_UP ||
 524         event.GetKeyCode() == WXK_DOWN ||
 525         event.GetKeyCode() == WXK_HOME ||
 526         event.GetKeyCode() == WXK_PAGEUP ||
 527         event.GetKeyCode() == WXK_PAGEDOWN ||
 528         event.GetKeyCode() == WXK_END ||
 529
 530         event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 531         event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 532         event.GetKeyCode() == WXK_NUMPAD_UP ||
 533         event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 534         event.GetKeyCode() == WXK_NUMPAD_HOME ||
 535         event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 536         event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 537         event.GetKeyCode() == WXK_NUMPAD_END)
 538     {
 539         KeyboardNavigate(event.GetKeyCode(), flags);
 540         return;
 541     }
 542
 543     // all the other keys modify the controls contents which shouldn't be
 544     // possible if we're read-only
 545     if ( !IsEditable() )
 546     {
 547         event.Skip();
 548         return;
 549     }
 550
 551     if (event.GetKeyCode() == WXK_RETURN)
 552     {
 553         BeginBatchUndo(_("Insert Text"));
 554
 555         long newPos = m_caretPosition;
 556
 557         DeleteSelectedContent(& newPos);
 558
 559         GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
 560         EndBatchUndo();
 561         SetDefaultStyleToCursorStyle();
 562
 563         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 564
 565         wxRichTextEvent cmdEvent(
 566             wxEVT_COMMAND_RICHTEXT_RETURN,
 567             GetId());
 568         cmdEvent.SetEventObject(this);
 569         cmdEvent.SetFlags(flags);
 570         cmdEvent.SetPosition(newPos+1);
 571
 572         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 573         {
 574             // Generate conventional event
 575             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 576             InitCommandEvent(textEvent);
 577
 578             GetEventHandler()->ProcessEvent(textEvent);
 579         }
 580         Update();
 581     }
 582     else if (event.GetKeyCode() == WXK_BACK)
 583     {
 584         BeginBatchUndo(_("Delete Text"));
 585
 586         // Submit range in character positions, which are greater than caret positions,
 587         // so subtract 1 for deleted character and add 1 for conversion to character position.
 588         if (m_caretPosition > -1 && !HasSelection())
 589         {
 590             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition, m_caretPosition),
 591                 m_caretPosition,   // Current caret position
 592                 m_caretPosition-1, // New caret position
 593                 this);
 594         }
 595         else
 596             DeleteSelectedContent();
 597
 598         EndBatchUndo();
 599
 600         if (GetLastPosition() == -1)
 601         {
 602             GetBuffer().Reset();
 603
 604             m_caretPosition = -1;
 605             PositionCaret();
 606             SetDefaultStyleToCursorStyle();
 607         }
 608
 609         ScrollIntoView(m_caretPosition, WXK_LEFT);
 610
 611         wxRichTextEvent cmdEvent(
 612             wxEVT_COMMAND_RICHTEXT_DELETE,
 613             GetId());
 614         cmdEvent.SetEventObject(this);
 615         cmdEvent.SetFlags(flags);
 616         cmdEvent.SetPosition(m_caretPosition+1);
 617         GetEventHandler()->ProcessEvent(cmdEvent);
 618
 619         Update();
 620     }
 621     else if (event.GetKeyCode() == WXK_DELETE)
 622     {
 623         BeginBatchUndo(_("Delete Text"));
 624
 625         // Submit range in character positions, which are greater than caret positions,
 626         if (m_caretPosition < GetBuffer().GetRange().GetEnd()+1 && !HasSelection())
 627         {
 628             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition+1, m_caretPosition+1),
 629                 m_caretPosition,   // Current caret position
 630                 m_caretPosition+1, // New caret position
 631                 this);
 632         }
 633         else
 634             DeleteSelectedContent();
 635
 636         EndBatchUndo();
 637
 638         if (GetLastPosition() == -1)
 639         {
 640             GetBuffer().Reset();
 641
 642             m_caretPosition = -1;
 643             PositionCaret();
 644             SetDefaultStyleToCursorStyle();
 645         }
 646
 647         wxRichTextEvent cmdEvent(
 648             wxEVT_COMMAND_RICHTEXT_DELETE,
 649             GetId());
 650         cmdEvent.SetEventObject(this);
 651         cmdEvent.SetFlags(flags);
 652         cmdEvent.SetPosition(m_caretPosition+1);
 653         GetEventHandler()->ProcessEvent(cmdEvent);
 654
 655         Update();
 656     }
 657     else
 658     {
 659         long keycode = event.GetKeyCode();
 660         switch ( keycode )
 661         {
 662             case WXK_ESCAPE:
 663             // case WXK_SPACE:
 664             case WXK_DELETE:
 665             case WXK_START:
 666             case WXK_LBUTTON:
 667             case WXK_RBUTTON:
 668             case WXK_CANCEL:
 669             case WXK_MBUTTON:
 670             case WXK_CLEAR:
 671             case WXK_SHIFT:
 672             case WXK_ALT:
 673             case WXK_CONTROL:
 674             case WXK_MENU:
 675             case WXK_PAUSE:
 676             case WXK_CAPITAL:
 677             case WXK_END:
 678             case WXK_HOME:
 679             case WXK_LEFT:
 680             case WXK_UP:
 681             case WXK_RIGHT:
 682             case WXK_DOWN:
 683             case WXK_SELECT:
 684             case WXK_PRINT:
 685             case WXK_EXECUTE:
 686             case WXK_SNAPSHOT:
 687             case WXK_INSERT:
 688             case WXK_HELP:
 689             case WXK_NUMPAD0:
 690             case WXK_NUMPAD1:
 691             case WXK_NUMPAD2:
 692             case WXK_NUMPAD3:
 693             case WXK_NUMPAD4:
 694             case WXK_NUMPAD5:
 695             case WXK_NUMPAD6:
 696             case WXK_NUMPAD7:
 697             case WXK_NUMPAD8:
 698             case WXK_NUMPAD9:
 699             case WXK_MULTIPLY:
 700             case WXK_ADD:
 701             case WXK_SEPARATOR:
 702             case WXK_SUBTRACT:
 703             case WXK_DECIMAL:
 704             case WXK_DIVIDE:
 705             case WXK_F1:
 706             case WXK_F2:
 707             case WXK_F3:
 708             case WXK_F4:
 709             case WXK_F5:
 710             case WXK_F6:
 711             case WXK_F7:
 712             case WXK_F8:
 713             case WXK_F9:
 714             case WXK_F10:
 715             case WXK_F11:
 716             case WXK_F12:
 717             case WXK_F13:
 718             case WXK_F14:
 719             case WXK_F15:
 720             case WXK_F16:
 721             case WXK_F17:
 722             case WXK_F18:
 723             case WXK_F19:
 724             case WXK_F20:
 725             case WXK_F21:
 726             case WXK_F22:
 727             case WXK_F23:
 728             case WXK_F24:
 729             case WXK_NUMLOCK:
 730             case WXK_SCROLL:
 731             case WXK_PAGEUP:
 732             case WXK_PAGEDOWN:
 733             case WXK_NUMPAD_SPACE:
 734             case WXK_NUMPAD_TAB:
 735             case WXK_NUMPAD_ENTER:
 736             case WXK_NUMPAD_F1:
 737             case WXK_NUMPAD_F2:
 738             case WXK_NUMPAD_F3:
 739             case WXK_NUMPAD_F4:
 740             case WXK_NUMPAD_HOME:
 741             case WXK_NUMPAD_LEFT:
 742             case WXK_NUMPAD_UP:
 743             case WXK_NUMPAD_RIGHT:
 744             case WXK_NUMPAD_DOWN:
 745             case WXK_NUMPAD_PAGEUP:
 746             case WXK_NUMPAD_PAGEDOWN:
 747             case WXK_NUMPAD_END:
 748             case WXK_NUMPAD_BEGIN:
 749             case WXK_NUMPAD_INSERT:
 750             case WXK_NUMPAD_DELETE:
 751             case WXK_NUMPAD_EQUAL:
 752             case WXK_NUMPAD_MULTIPLY:
 753             case WXK_NUMPAD_ADD:
 754             case WXK_NUMPAD_SEPARATOR:
 755             case WXK_NUMPAD_SUBTRACT:
 756             case WXK_NUMPAD_DECIMAL:
 757             {
 758                 event.Skip();
 759                 return;
 760             }
 761
 762             default:
 763             {
 764                 if (event.CmdDown() || event.AltDown())
 765                 {
 766                     event.Skip();
 767                     return;
 768                 }
 769
 770                 wxRichTextEvent cmdEvent(
 771                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
 772                     GetId());
 773                 cmdEvent.SetEventObject(this);
 774                 cmdEvent.SetFlags(flags);
 775                 cmdEvent.SetCharacter((wxChar) keycode);
 776                 cmdEvent.SetPosition(m_caretPosition+1);
 777
 778                 if (keycode == wxT('\t'))
 779                 {
 780                     // See if we need to promote or demote the selection or paragraph at the cursor
 781                     // position, instead of inserting a tab.
 782                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
 783                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
 784                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
 785                     {
 786                         wxRichTextRange range;
 787                         if (HasSelection())
 788                             range = GetSelectionRange();
 789                         else
 790                             range = para->GetRange().FromInternal();
 791
 792                         int promoteBy = event.ShiftDown() ? 1 : -1;
 793
 794                         PromoteList(promoteBy, range, NULL);
 795
 796                         GetEventHandler()->ProcessEvent(cmdEvent);
 797
 798                         return;
 799                     }
 800                 }
 801
 802                 BeginBatchUndo(_("Insert Text"));
 803
 804                 long newPos = m_caretPosition;
 805                 DeleteSelectedContent(& newPos);
 806
 807                 wxString str = (wxChar) event.GetKeyCode();
 808                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
 809
 810                 EndBatchUndo();
 811
 812                 SetDefaultStyleToCursorStyle();
 813                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
 814
 815                 GetEventHandler()->ProcessEvent(cmdEvent);
 816
 817                 Update();
 818             }
 819         }
 820     }
 821 }
 822
 823 /// Delete content if there is a selection, e.g. when pressing a key.
 824 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
 825 {
 826     if (HasSelection())
 827     {
 828         long pos = m_selectionRange.GetStart();
 829         GetBuffer().DeleteRangeWithUndo(m_selectionRange,
 830             m_caretPosition,       // Current caret position
 831             pos,    // New caret position
 832             this);
 833         m_selectionRange.SetRange(-2, -2);
 834
 835         if (newPos)
 836             *newPos = pos-1;
 837         return true;
 838     }
 839     else
 840         return false;
 841 }
 842
 843 /// Keyboard navigation
 844
 845 /*
 846
 847 Left:       left one character
 848 Right:      right one character
 849 Up:         up one line
 850 Down:       down one line
 851 Ctrl-Left:  left one word
 852 Ctrl-Right: right one word
 853 Ctrl-Up:    previous paragraph start
 854 Ctrl-Down:  next start of paragraph
 855 Home:       start of line
 856 End:        end of line
 857 Ctrl-Home:  start of document
 858 Ctrl-End:   end of document
 859 Page-Up:    Up a screen
 860 Page-Down:  Down a screen
 861
 862 Maybe:
 863
 864 Ctrl-Alt-PgUp: Start of window
 865 Ctrl-Alt-PgDn: End of window
 866 F8:         Start selection mode
 867 Esc:        End selection mode
 868
 869 Adding Shift does the above but starts/extends selection.
 870
 871
 872  */
 873
 874 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
 875 {
 876     bool success = false;
 877
 878     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
 879     {
 880         if (flags & wxRICHTEXT_CTRL_DOWN)
 881             success = WordRight(1, flags);
 882         else
 883             success = MoveRight(1, flags);
 884     }
 885     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
 886     {
 887         if (flags & wxRICHTEXT_CTRL_DOWN)
 888             success = WordLeft(1, flags);
 889         else
 890             success = MoveLeft(1, flags);
 891     }
 892     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
 893     {
 894         if (flags & wxRICHTEXT_CTRL_DOWN)
 895             success = MoveToParagraphStart(flags);
 896         else
 897             success = MoveUp(1, flags);
 898     }
 899     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
 900     {
 901         if (flags & wxRICHTEXT_CTRL_DOWN)
 902             success = MoveToParagraphEnd(flags);
 903         else
 904             success = MoveDown(1, flags);
 905     }
 906     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
 907     {
 908         success = PageUp(1, flags);
 909     }
 910     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
 911     {
 912         success = PageDown(1, flags);
 913     }
 914     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
 915     {
 916         if (flags & wxRICHTEXT_CTRL_DOWN)
 917             success = MoveHome(flags);
 918         else
 919             success = MoveToLineStart(flags);
 920     }
 921     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
 922     {
 923         if (flags & wxRICHTEXT_CTRL_DOWN)
 924             success = MoveEnd(flags);
 925         else
 926             success = MoveToLineEnd(flags);
 927     }
 928
 929     if (success)
 930     {
 931         ScrollIntoView(m_caretPosition, keyCode);
 932         SetDefaultStyleToCursorStyle();
 933     }
 934
 935     return success;
 936 }
 937
 938 /// Extend the selection. Selections are in caret positions.
 939 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
 940 {
 941     if (flags & wxRICHTEXT_SHIFT_DOWN)
 942     {
 943         // If not currently selecting, start selecting
 944         if (m_selectionRange.GetStart() == -2)
 945         {
 946             m_selectionAnchor = oldPos;
 947
 948             if (oldPos > newPos)
 949                 m_selectionRange.SetRange(newPos+1, oldPos);
 950             else
 951                 m_selectionRange.SetRange(oldPos+1, newPos);
 952         }
 953         else
 954         {
 955             // Always ensure that the selection range start is greater than
 956             // the end.
 957             if (newPos > m_selectionAnchor)
 958                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
 959             else
 960                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
 961         }
 962
 963         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
 964         {
 965             wxLogDebug(wxT("Strange selection range"));
 966         }
 967
 968         return true;
 969     }
 970     else
 971         return false;
 972 }
 973
 974 /// Scroll into view, returning true if we scrolled.
 975 /// This takes a _caret_ position.
 976 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
 977 {
 978     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
 979
 980     if (!line)
 981         return false;
 982
 983     int ppuX, ppuY;
 984     GetScrollPixelsPerUnit(& ppuX, & ppuY);
 985
 986     int startXUnits, startYUnits;
 987     GetViewStart(& startXUnits, & startYUnits);
 988     int startY = startYUnits * ppuY;
 989
 990     int sx = 0, sy = 0;
 991     GetVirtualSize(& sx, & sy);
 992     int sxUnits = 0;
 993     int syUnits = 0;
 994     if (ppuY != 0)
 995         syUnits = sy/ppuY;
 996
 997     wxRect rect = line->GetRect();
 998
 999     bool scrolled = false;
1000
1001     wxSize clientSize = GetClientSize();
1002
1003     // Going down
1004     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1005         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_DOWN ||
1006         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1007         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1008     {
1009         if ((rect.y + rect.height) > (clientSize.y + startY))
1010         {
1011             // Make it scroll so this item is at the bottom
1012             // of the window
1013             int y = rect.y - (clientSize.y - rect.height);
1014             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1015
1016             // If we're still off the screen, scroll another line down
1017             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1018                 yUnits ++;
1019
1020             if (startYUnits != yUnits)
1021             {
1022                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1023                 scrolled = true;
1024             }
1025         }
1026         else if (rect.y < startY)
1027         {
1028             // Make it scroll so this item is at the top
1029             // of the window
1030             int y = rect.y ;
1031             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1032
1033             if (startYUnits != yUnits)
1034             {
1035                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1036                 scrolled = true;
1037             }
1038         }
1039     }
1040     // Going up
1041     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1042              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1043              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1044              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1045     {
1046         if (rect.y < startY)
1047         {
1048             // Make it scroll so this item is at the top
1049             // of the window
1050             int y = rect.y ;
1051             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1052
1053             if (startYUnits != yUnits)
1054             {
1055                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1056                 scrolled = true;
1057             }
1058         }
1059         else if ((rect.y + rect.height) > (clientSize.y + startY))
1060         {
1061             // Make it scroll so this item is at the bottom
1062             // of the window
1063             int y = rect.y - (clientSize.y - rect.height);
1064             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1065
1066             // If we're still off the screen, scroll another line down
1067             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1068                 yUnits ++;
1069
1070             if (startYUnits != yUnits)
1071             {
1072                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1073                 scrolled = true;
1074             }
1075         }
1076     }
1077     PositionCaret();
1078
1079     return scrolled;
1080 }
1081
1082 /// Is the given position visible on the screen?
1083 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1084 {
1085     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1086
1087     if (!line)
1088         return false;
1089
1090     int ppuX, ppuY;
1091     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1092
1093     int startX, startY;
1094     GetViewStart(& startX, & startY);
1095     startX = 0;
1096     startY = startY * ppuY;
1097
1098     int sx = 0, sy = 0;
1099     GetVirtualSize(& sx, & sy);
1100     sx = 0;
1101     if (ppuY != 0)
1102         sy = sy/ppuY;
1103
1104     wxRect rect = line->GetRect();
1105
1106     wxSize clientSize = GetClientSize();
1107
1108     return !(((rect.y + rect.height) > (clientSize.y + startY)) || rect.y < startY);
1109 }
1110
1111 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1112 {
1113     m_caretPosition = position;
1114     m_caretAtLineStart = showAtLineStart;
1115 }
1116
1117 /// Move caret one visual step forward: this may mean setting a flag
1118 /// and keeping the same position if we're going from the end of one line
1119 /// to the start of the next, which may be the exact same caret position.
1120 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1121 {
1122     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1123
1124     // Only do the check if we're not at the end of the paragraph (where things work OK
1125     // anyway)
1126     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1127     {
1128         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1129
1130         if (line)
1131         {
1132             wxRichTextRange lineRange = line->GetAbsoluteRange();
1133
1134             // We're at the end of a line. See whether we need to
1135             // stay at the same actual caret position but change visual
1136             // position, or not.
1137             if (oldPosition == lineRange.GetEnd())
1138             {
1139                 if (m_caretAtLineStart)
1140                 {
1141                     // We're already at the start of the line, so actually move on now.
1142                     m_caretPosition = oldPosition + 1;
1143                     m_caretAtLineStart = false;
1144                 }
1145                 else
1146                 {
1147                     // We're showing at the end of the line, so keep to
1148                     // the same position but indicate that we're to show
1149                     // at the start of the next line.
1150                     m_caretPosition = oldPosition;
1151                     m_caretAtLineStart = true;
1152                 }
1153                 SetDefaultStyleToCursorStyle();
1154                 return;
1155             }
1156         }
1157     }
1158     m_caretPosition ++;
1159     SetDefaultStyleToCursorStyle();
1160 }
1161
1162 /// Move caret one visual step backward: this may mean setting a flag
1163 /// and keeping the same position if we're going from the end of one line
1164 /// to the start of the next, which may be the exact same caret position.
1165 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1166 {
1167     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1168
1169     // Only do the check if we're not at the start of the paragraph (where things work OK
1170     // anyway)
1171     if (para && (oldPosition != para->GetRange().GetStart()))
1172     {
1173         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1174
1175         if (line)
1176         {
1177             wxRichTextRange lineRange = line->GetAbsoluteRange();
1178
1179             // We're at the start of a line. See whether we need to
1180             // stay at the same actual caret position but change visual
1181             // position, or not.
1182             if (oldPosition == lineRange.GetStart())
1183             {
1184                 m_caretPosition = oldPosition-1;
1185                 m_caretAtLineStart = true;
1186                 return;
1187             }
1188             else if (oldPosition == lineRange.GetEnd())
1189             {
1190                 if (m_caretAtLineStart)
1191                 {
1192                     // We're at the start of the line, so keep the same caret position
1193                     // but clear the start-of-line flag.
1194                     m_caretPosition = oldPosition;
1195                     m_caretAtLineStart = false;
1196                 }
1197                 else
1198                 {
1199                     // We're showing at the end of the line, so go back
1200                     // to the previous character position.
1201                     m_caretPosition = oldPosition - 1;
1202                 }
1203                 SetDefaultStyleToCursorStyle();
1204                 return;
1205             }
1206         }
1207     }
1208     m_caretPosition --;
1209     SetDefaultStyleToCursorStyle();
1210 }
1211
1212 /// Move right
1213 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1214 {
1215     long endPos = GetBuffer().GetRange().GetEnd();
1216
1217     if (m_caretPosition + noPositions < endPos)
1218     {
1219         long oldPos = m_caretPosition;
1220         long newPos = m_caretPosition + noPositions;
1221
1222         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1223         if (!extendSel)
1224             SelectNone();
1225
1226         // Determine by looking at oldPos and m_caretPosition whether
1227         // we moved from the end of a line to the start of the next line, in which case
1228         // we want to adjust the caret position such that it is positioned at the
1229         // start of the next line, rather than jumping past the first character of the
1230         // line.
1231         if (noPositions == 1 && !extendSel)
1232             MoveCaretForward(oldPos);
1233         else
1234             SetCaretPosition(newPos);
1235
1236         PositionCaret();
1237         SetDefaultStyleToCursorStyle();
1238
1239         if (extendSel)
1240             Refresh(false);
1241         return true;
1242     }
1243     else
1244         return false;
1245 }
1246
1247 /// Move left
1248 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1249 {
1250     long startPos = -1;
1251
1252     if (m_caretPosition > startPos - noPositions + 1)
1253     {
1254         long oldPos = m_caretPosition;
1255         long newPos = m_caretPosition - noPositions;
1256         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1257         if (!extendSel)
1258             SelectNone();
1259
1260         if (noPositions == 1 && !extendSel)
1261             MoveCaretBack(oldPos);
1262         else
1263             SetCaretPosition(newPos);
1264
1265         PositionCaret();
1266         SetDefaultStyleToCursorStyle();
1267
1268         if (extendSel)
1269             Refresh(false);
1270         return true;
1271     }
1272     else
1273         return false;
1274 }
1275
1276 /// Move up
1277 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1278 {
1279     return MoveDown(- noLines, flags);
1280 }
1281
1282 /// Move up
1283 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1284 {
1285     if (!GetCaret())
1286         return false;
1287
1288     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1289     wxPoint pt = GetCaret()->GetPosition();
1290     long newLine = lineNumber + noLines;
1291
1292     if (lineNumber != -1)
1293     {
1294         if (noLines > 0)
1295         {
1296             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1297
1298             if (newLine > lastLine)
1299                 return false;
1300         }
1301         else
1302         {
1303             if (newLine < 0)
1304                 return false;
1305         }
1306     }
1307
1308     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1309     if (lineObj)
1310     {
1311         pt.y = lineObj->GetAbsolutePosition().y + 2;
1312     }
1313     else
1314         return false;
1315
1316     long newPos = 0;
1317     wxClientDC dc(this);
1318     PrepareDC(dc);
1319     dc.SetFont(GetFont());
1320
1321     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1322
1323     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1324     {
1325         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1326         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1327         // so we view the caret at the start of the line.
1328         bool caretLineStart = false;
1329         if (hitTest == wxRICHTEXT_HITTEST_BEFORE)
1330         {
1331             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1332             wxRichTextRange lineRange;
1333             if (thisLine)
1334                 lineRange = thisLine->GetAbsoluteRange();
1335
1336             if (thisLine && (newPos-1) == lineRange.GetEnd())
1337             {
1338                 newPos --;
1339                 caretLineStart = true;
1340             }
1341             else
1342             {
1343                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1344                 if (para && para->GetRange().GetStart() == newPos)
1345                     newPos --;
1346             }
1347         }
1348
1349         long newSelEnd = newPos;
1350
1351         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1352         if (!extendSel)
1353             SelectNone();
1354
1355         SetCaretPosition(newPos, caretLineStart);
1356         PositionCaret();
1357         SetDefaultStyleToCursorStyle();
1358
1359         if (extendSel)
1360             Refresh(false);
1361         return true;
1362     }
1363
1364     return false;
1365 }
1366
1367 /// Move to the end of the paragraph
1368 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1369 {
1370     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1371     if (para)
1372     {
1373         long newPos = para->GetRange().GetEnd() - 1;
1374         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1375         if (!extendSel)
1376             SelectNone();
1377
1378         SetCaretPosition(newPos);
1379         PositionCaret();
1380         SetDefaultStyleToCursorStyle();
1381
1382         if (extendSel)
1383             Refresh(false);
1384         return true;
1385     }
1386
1387     return false;
1388 }
1389
1390 /// Move to the start of the paragraph
1391 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1392 {
1393     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1394     if (para)
1395     {
1396         long newPos = para->GetRange().GetStart() - 1;
1397         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1398         if (!extendSel)
1399             SelectNone();
1400
1401         SetCaretPosition(newPos);
1402         PositionCaret();
1403         SetDefaultStyleToCursorStyle();
1404
1405         if (extendSel)
1406             Refresh(false);
1407         return true;
1408     }
1409
1410     return false;
1411 }
1412
1413 /// Move to the end of the line
1414 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1415 {
1416     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1417
1418     if (line)
1419     {
1420         wxRichTextRange lineRange = line->GetAbsoluteRange();
1421         long newPos = lineRange.GetEnd();
1422         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1423         if (!extendSel)
1424             SelectNone();
1425
1426         SetCaretPosition(newPos);
1427         PositionCaret();
1428         SetDefaultStyleToCursorStyle();
1429
1430         if (extendSel)
1431             Refresh(false);
1432         return true;
1433     }
1434
1435     return false;
1436 }
1437
1438 /// Move to the start of the line
1439 bool wxRichTextCtrl::MoveToLineStart(int flags)
1440 {
1441     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1442     if (line)
1443     {
1444         wxRichTextRange lineRange = line->GetAbsoluteRange();
1445         long newPos = lineRange.GetStart()-1;
1446
1447         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1448         if (!extendSel)
1449             SelectNone();
1450
1451         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1452
1453         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1454         PositionCaret();
1455         SetDefaultStyleToCursorStyle();
1456
1457         if (extendSel)
1458             Refresh(false);
1459         return true;
1460     }
1461
1462     return false;
1463 }
1464
1465 /// Move to the start of the buffer
1466 bool wxRichTextCtrl::MoveHome(int flags)
1467 {
1468     if (m_caretPosition != -1)
1469     {
1470         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1471         if (!extendSel)
1472             SelectNone();
1473
1474         SetCaretPosition(-1);
1475         PositionCaret();
1476         SetDefaultStyleToCursorStyle();
1477
1478         if (extendSel)
1479             Refresh(false);
1480         return true;
1481     }
1482     else
1483         return false;
1484 }
1485
1486 /// Move to the end of the buffer
1487 bool wxRichTextCtrl::MoveEnd(int flags)
1488 {
1489     long endPos = GetBuffer().GetRange().GetEnd()-1;
1490
1491     if (m_caretPosition != endPos)
1492     {
1493         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1494         if (!extendSel)
1495             SelectNone();
1496
1497         SetCaretPosition(endPos);
1498         PositionCaret();
1499         SetDefaultStyleToCursorStyle();
1500
1501         if (extendSel)
1502             Refresh(false);
1503         return true;
1504     }
1505     else
1506         return false;
1507 }
1508
1509 /// Move noPages pages up
1510 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1511 {
1512     return PageDown(- noPages, flags);
1513 }
1514
1515 /// Move noPages pages down
1516 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1517 {
1518     // Calculate which line occurs noPages * screen height further down.
1519     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1520     if (line)
1521     {
1522         wxSize clientSize = GetClientSize();
1523         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1524
1525         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1526         if (newLine)
1527         {
1528             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1529             long pos = lineRange.GetStart()-1;
1530             if (pos != m_caretPosition)
1531             {
1532                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1533
1534                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1535                 if (!extendSel)
1536                     SelectNone();
1537
1538                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1539                 PositionCaret();
1540                 SetDefaultStyleToCursorStyle();
1541
1542                 if (extendSel)
1543                     Refresh(false);
1544                 return true;
1545             }
1546         }
1547     }
1548
1549     return false;
1550 }
1551
1552 // Finds the caret position for the next word
1553 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1554 {
1555     long endPos = GetBuffer().GetRange().GetEnd();
1556
1557     if (direction > 0)
1558     {
1559         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1560
1561         // First skip current text to space
1562         while (i < endPos && i > -1)
1563         {
1564             // i is in character, not caret positions
1565             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1566             if (text != wxT(" ") && !text.empty())
1567                 i += direction;
1568             else
1569             {
1570                 break;
1571             }
1572         }
1573         while (i < endPos && i > -1)
1574         {
1575             // i is in character, not caret positions
1576             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1577             if (text.empty()) // End of paragraph, or maybe an image
1578                 return wxMax(-1, i - 1);
1579             else if (text == wxT(" ") || text.empty())
1580                 i += direction;
1581             else
1582             {
1583                 // Convert to caret position
1584                 return wxMax(-1, i - 1);
1585             }
1586         }
1587         if (i >= endPos)
1588             return endPos-1;
1589         return i-1;
1590     }
1591     else
1592     {
1593         long i = m_caretPosition;
1594
1595         // First skip white space
1596         while (i < endPos && i > -1)
1597         {
1598             // i is in character, not caret positions
1599             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1600             if (text.empty()) // End of paragraph, or maybe an image
1601                 break;
1602             else if (text == wxT(" ") || text.empty())
1603                 i += direction;
1604             else
1605                 break;
1606         }
1607         // Next skip current text to space
1608         while (i < endPos && i > -1)
1609         {
1610             // i is in character, not caret positions
1611             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1612             if (text != wxT(" ") /* && !text.empty() */)
1613                 i += direction;
1614             else
1615             {
1616                 return i;
1617             }
1618         }
1619         if (i < -1)
1620             return -1;
1621         return i;
1622     }
1623 }
1624
1625 /// Move n words left
1626 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1627 {
1628     long pos = FindNextWordPosition(-1);
1629     if (pos != m_caretPosition)
1630     {
1631         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1632
1633         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1634         if (!extendSel)
1635             SelectNone();
1636
1637         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1638         PositionCaret();
1639         SetDefaultStyleToCursorStyle();
1640
1641         if (extendSel)
1642             Refresh(false);
1643         return true;
1644     }
1645
1646     return false;
1647 }
1648
1649 /// Move n words right
1650 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1651 {
1652     long pos = FindNextWordPosition(1);
1653     if (pos != m_caretPosition)
1654     {
1655         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1656
1657         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1658         if (!extendSel)
1659             SelectNone();
1660
1661         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1662         PositionCaret();
1663         SetDefaultStyleToCursorStyle();
1664
1665         if (extendSel)
1666             Refresh(false);
1667         return true;
1668     }
1669
1670     return false;
1671 }
1672
1673 /// Sizing
1674 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1675 {
1676     // Only do sizing optimization for large buffers
1677     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1678     {
1679         m_fullLayoutRequired = true;
1680         m_fullLayoutTime = wxGetLocalTimeMillis();
1681         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1682         LayoutContent(true /* onlyVisibleRect */);
1683     }
1684     else
1685         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1686
1687 #if wxRICHTEXT_BUFFERED_PAINTING
1688     RecreateBuffer();
1689 #endif
1690
1691     event.Skip();
1692 }
1693
1694
1695 /// Idle-time processing
1696 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1697 {
1698     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1699
1700     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1701     {
1702         m_fullLayoutRequired = false;
1703         m_fullLayoutTime = 0;
1704         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1705         ShowPosition(m_fullLayoutSavedPosition);
1706         Refresh(false);
1707     }
1708
1709     if (m_caretPositionForDefaultStyle != -2)
1710     {
1711         // If the caret position has changed, no longer reflect the default style
1712         // in the UI.
1713         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1714             m_caretPositionForDefaultStyle = -2;
1715     }
1716
1717     event.Skip();
1718 }
1719
1720 /// Scrolling
1721 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1722 {
1723     // Not used
1724     event.Skip();
1725 }
1726
1727 /// Set up scrollbars, e.g. after a resize
1728 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1729 {
1730     if (m_freezeCount)
1731         return;
1732
1733     if (GetBuffer().IsEmpty())
1734     {
1735         SetScrollbars(0, 0, 0, 0, 0, 0);
1736         return;
1737     }
1738
1739     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1740     // of pixels. See e.g. wxVScrolledWindow for ideas.
1741     int pixelsPerUnit = 5;
1742     wxSize clientSize = GetClientSize();
1743
1744     int maxHeight = GetBuffer().GetCachedSize().y;
1745
1746     // Round up so we have at least maxHeight pixels
1747     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1748
1749     int startX = 0, startY = 0;
1750     if (!atTop)
1751         GetViewStart(& startX, & startY);
1752
1753     int maxPositionX = 0; // wxMax(sz.x - clientSize.x, 0);
1754     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
1755
1756     // Move to previous scroll position if
1757     // possible
1758     SetScrollbars(0, pixelsPerUnit,
1759         0, unitsY,
1760         wxMin(maxPositionX, startX), wxMin(maxPositionY, startY));
1761 }
1762
1763 /// Paint the background
1764 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1765 {
1766     wxColour backgroundColour = GetBackgroundColour();
1767     if (!backgroundColour.Ok())
1768         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1769
1770     // Clear the background
1771     dc.SetBrush(wxBrush(backgroundColour));
1772     dc.SetPen(*wxTRANSPARENT_PEN);
1773     wxRect windowRect(GetClientSize());
1774     windowRect.x -= 2; windowRect.y -= 2;
1775     windowRect.width += 4; windowRect.height += 4;
1776
1777     // We need to shift the rectangle to take into account
1778     // scrolling. Converting device to logical coordinates.
1779     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1780     dc.DrawRectangle(windowRect);
1781 }
1782
1783 #if wxRICHTEXT_BUFFERED_PAINTING
1784 /// Recreate buffer bitmap if necessary
1785 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1786 {
1787     wxSize sz = size;
1788     if (sz == wxDefaultSize)
1789         sz = GetClientSize();
1790
1791     if (sz.x < 1 || sz.y < 1)
1792         return false;
1793
1794     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1795         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1796     return m_bufferBitmap.Ok();
1797 }
1798 #endif
1799
1800 // ----------------------------------------------------------------------------
1801 // file IO functions
1802 // ----------------------------------------------------------------------------
1803
1804 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
1805 {
1806     bool success = GetBuffer().LoadFile(filename, fileType);
1807     if (success)
1808         m_filename = filename;
1809
1810     DiscardEdits();
1811     SetInsertionPoint(0);
1812     LayoutContent();
1813     PositionCaret();
1814     SetupScrollbars(true);
1815     Refresh(false);
1816     SendTextUpdatedEvent();
1817
1818     if (success)
1819         return true;
1820     else
1821     {
1822         wxLogError(_("File couldn't be loaded."));
1823
1824         return false;
1825     }
1826 }
1827
1828 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
1829 {
1830     if (GetBuffer().SaveFile(filename, fileType))
1831     {
1832         m_filename = filename;
1833
1834         DiscardEdits();
1835
1836         return true;
1837     }
1838
1839     wxLogError(_("The text couldn't be saved."));
1840
1841     return false;
1842 }
1843
1844 // ----------------------------------------------------------------------------
1845 // wxRichTextCtrl specific functionality
1846 // ----------------------------------------------------------------------------
1847
1848 /// Add a new paragraph of text to the end of the buffer
1849 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
1850 {
1851     return GetBuffer().AddParagraph(text);
1852 }
1853
1854 /// Add an image
1855 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
1856 {
1857     return GetBuffer().AddImage(image);
1858 }
1859
1860 // ----------------------------------------------------------------------------
1861 // selection and ranges
1862 // ----------------------------------------------------------------------------
1863
1864 void wxRichTextCtrl::SelectAll()
1865 {
1866     SetSelection(0, GetLastPosition()+1);
1867     m_selectionAnchor = -1;
1868 }
1869
1870 /// Select none
1871 void wxRichTextCtrl::SelectNone()
1872 {
1873     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
1874         SetSelection(-2, -2);
1875     m_selectionAnchor = -2;
1876 }
1877
1878 static bool wxIsWordDelimiter(const wxString& text)
1879 {
1880     return !text.IsEmpty() && !wxIsalnum(text[0]);
1881 }
1882
1883 /// Select the word at the given character position
1884 bool wxRichTextCtrl::SelectWord(long position)
1885 {
1886     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
1887         return false;
1888
1889     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
1890     if (!para)
1891         return false;
1892
1893     long positionStart = position;
1894     long positionEnd = position;
1895
1896     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
1897     {
1898         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
1899         if (wxIsWordDelimiter(text))
1900         {
1901             positionStart ++;
1902             break;
1903         }
1904     }
1905     if (positionStart < para->GetRange().GetStart())
1906         positionStart = para->GetRange().GetStart();
1907
1908     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
1909     {
1910         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
1911         if (wxIsWordDelimiter(text))
1912         {
1913             positionEnd --;
1914             break;
1915         }
1916     }
1917     if (positionEnd >= para->GetRange().GetEnd())
1918         positionEnd = para->GetRange().GetEnd();
1919
1920     SetSelection(positionStart, positionEnd+1);
1921
1922     if (positionStart >= 0)
1923     {
1924         MoveCaret(positionStart-1, true);
1925         SetDefaultStyleToCursorStyle();
1926     }
1927
1928     return true;
1929 }
1930
1931 wxString wxRichTextCtrl::GetStringSelection() const
1932 {
1933     long from, to;
1934     GetSelection(&from, &to);
1935
1936     return GetRange(from, to);
1937 }
1938
1939 // ----------------------------------------------------------------------------
1940 // hit testing
1941 // ----------------------------------------------------------------------------
1942
1943 wxTextCtrlHitTestResult
1944 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
1945 {
1946     // implement in terms of the other overload as the native ports typically
1947     // can get the position and not (x, y) pair directly (although wxUniv
1948     // directly gets x and y -- and so overrides this method as well)
1949     long pos;
1950     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
1951
1952     if ( rc != wxTE_HT_UNKNOWN )
1953     {
1954         PositionToXY(pos, x, y);
1955     }
1956
1957     return rc;
1958 }
1959
1960 wxTextCtrlHitTestResult
1961 wxRichTextCtrl::HitTest(const wxPoint& pt,
1962                         long * pos) const
1963 {
1964     wxClientDC dc((wxRichTextCtrl*) this);
1965     ((wxRichTextCtrl*)this)->PrepareDC(dc);
1966
1967     // Buffer uses logical position (relative to start of buffer)
1968     // so convert
1969     wxPoint pt2 = GetLogicalPoint(pt);
1970
1971     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
1972
1973     switch ( hit )
1974     {
1975         case wxRICHTEXT_HITTEST_BEFORE:
1976             return wxTE_HT_BEFORE;
1977
1978         case wxRICHTEXT_HITTEST_AFTER:
1979             return wxTE_HT_BEYOND;
1980
1981         case wxRICHTEXT_HITTEST_ON:
1982             return wxTE_HT_ON_TEXT;
1983     }
1984
1985     return wxTE_HT_UNKNOWN;
1986 }
1987
1988 // ----------------------------------------------------------------------------
1989 // set/get the controls text
1990 // ----------------------------------------------------------------------------
1991
1992 wxString wxRichTextCtrl::GetValue() const
1993 {
1994     return GetBuffer().GetText();
1995 }
1996
1997 wxString wxRichTextCtrl::GetRange(long from, long to) const
1998 {
1999     // Public API for range is different from internals
2000     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2001 }
2002
2003 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2004 {
2005     Clear();
2006
2007     // if the text is long enough, it's faster to just set it instead of first
2008     // comparing it with the old one (chances are that it will be different
2009     // anyhow, this comparison is there to avoid flicker for small single-line
2010     // edit controls mostly)
2011     if ( (value.length() > 0x400) || (value != GetValue()) )
2012     {
2013         DoWriteText(value);
2014
2015         // for compatibility, don't move the cursor when doing SetValue()
2016         SetInsertionPoint(0);
2017     }
2018     else // same text
2019     {
2020         if ( flags & SetValue_SendEvent )
2021         {
2022             // still send an event for consistency
2023             SendTextUpdatedEvent();
2024         }
2025     }
2026
2027     // we should reset the modified flag even if the value didn't really change
2028
2029     // mark the control as being not dirty - we changed its text, not the
2030     // user
2031     DiscardEdits();
2032 }
2033
2034 void wxRichTextCtrl::WriteText(const wxString& value)
2035 {
2036     DoWriteText(value);
2037 }
2038
2039 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2040 {
2041     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2042
2043     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this);
2044
2045     if ( flags & SetValue_SendEvent )
2046         SendTextUpdatedEvent();
2047 }
2048
2049 void wxRichTextCtrl::AppendText(const wxString& text)
2050 {
2051     SetInsertionPointEnd();
2052
2053     WriteText(text);
2054 }
2055
2056 /// Write an image at the current insertion point
2057 bool wxRichTextCtrl::WriteImage(const wxImage& image, int bitmapType)
2058 {
2059     wxRichTextImageBlock imageBlock;
2060
2061     wxImage image2 = image;
2062     if (imageBlock.MakeImageBlock(image2, bitmapType))
2063         return WriteImage(imageBlock);
2064
2065     return false;
2066 }
2067
2068 bool wxRichTextCtrl::WriteImage(const wxString& filename, int bitmapType)
2069 {
2070     wxRichTextImageBlock imageBlock;
2071
2072     wxImage image;
2073     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2074         return WriteImage(imageBlock);
2075
2076     return false;
2077 }
2078
2079 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2080 {
2081     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2082 }
2083
2084 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, int bitmapType)
2085 {
2086     if (bitmap.Ok())
2087     {
2088         wxRichTextImageBlock imageBlock;
2089
2090         wxImage image = bitmap.ConvertToImage();
2091         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2092             return WriteImage(imageBlock);
2093     }
2094
2095     return false;
2096 }
2097
2098 /// Insert a newline (actually paragraph) at the current insertion point.
2099 bool wxRichTextCtrl::Newline()
2100 {
2101     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
2102 }
2103
2104
2105 // ----------------------------------------------------------------------------
2106 // Clipboard operations
2107 // ----------------------------------------------------------------------------
2108
2109 void wxRichTextCtrl::Copy()
2110 {
2111     if (CanCopy())
2112     {
2113         wxRichTextRange range = GetInternalSelectionRange();
2114         GetBuffer().CopyToClipboard(range);
2115     }
2116 }
2117
2118 void wxRichTextCtrl::Cut()
2119 {
2120     if (CanCut())
2121     {
2122         wxRichTextRange range = GetInternalSelectionRange();
2123         GetBuffer().CopyToClipboard(range);
2124
2125         DeleteSelectedContent();
2126         LayoutContent();
2127         Refresh(false);
2128     }
2129 }
2130
2131 void wxRichTextCtrl::Paste()
2132 {
2133     if (CanPaste())
2134     {
2135         BeginBatchUndo(_("Paste"));
2136
2137         long newPos = m_caretPosition;
2138         DeleteSelectedContent(& newPos);
2139
2140         GetBuffer().PasteFromClipboard(newPos);
2141
2142         EndBatchUndo();
2143     }
2144 }
2145
2146 void wxRichTextCtrl::DeleteSelection()
2147 {
2148     if (CanDeleteSelection())
2149     {
2150         DeleteSelectedContent();
2151     }
2152 }
2153
2154 bool wxRichTextCtrl::HasSelection() const
2155 {
2156     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2157 }
2158
2159 bool wxRichTextCtrl::CanCopy() const
2160 {
2161     // Can copy if there's a selection
2162     return HasSelection();
2163 }
2164
2165 bool wxRichTextCtrl::CanCut() const
2166 {
2167     return HasSelection() && IsEditable();
2168 }
2169
2170 bool wxRichTextCtrl::CanPaste() const
2171 {
2172     if ( !IsEditable() )
2173         return false;
2174
2175     return GetBuffer().CanPasteFromClipboard();
2176 }
2177
2178 bool wxRichTextCtrl::CanDeleteSelection() const
2179 {
2180     return HasSelection() && IsEditable();
2181 }
2182
2183
2184 // ----------------------------------------------------------------------------
2185 // Accessors
2186 // ----------------------------------------------------------------------------
2187
2188 void wxRichTextCtrl::SetEditable(bool editable)
2189 {
2190     m_editable = editable;
2191 }
2192
2193 void wxRichTextCtrl::SetInsertionPoint(long pos)
2194 {
2195     SelectNone();
2196
2197     m_caretPosition = pos - 1;
2198 }
2199
2200 void wxRichTextCtrl::SetInsertionPointEnd()
2201 {
2202     long pos = GetLastPosition();
2203     SetInsertionPoint(pos);
2204 }
2205
2206 long wxRichTextCtrl::GetInsertionPoint() const
2207 {
2208     return m_caretPosition+1;
2209 }
2210
2211 wxTextPos wxRichTextCtrl::GetLastPosition() const
2212 {
2213     return GetBuffer().GetRange().GetEnd();
2214 }
2215
2216 // If the return values from and to are the same, there is no
2217 // selection.
2218 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2219 {
2220     *from = m_selectionRange.GetStart();
2221     *to = m_selectionRange.GetEnd();
2222     if ((*to) != -1 && (*to) != -2)
2223         (*to) ++;
2224 }
2225
2226 bool wxRichTextCtrl::IsEditable() const
2227 {
2228     return m_editable;
2229 }
2230
2231 // ----------------------------------------------------------------------------
2232 // selection
2233 // ----------------------------------------------------------------------------
2234
2235 void wxRichTextCtrl::SetSelection(long from, long to)
2236 {
2237     // if from and to are both -1, it means (in wxWidgets) that all text should
2238     // be selected.
2239     if ( (from == -1) && (to == -1) )
2240     {
2241         from = 0;
2242         to = GetLastPosition()+1;
2243     }
2244
2245     DoSetSelection(from, to);
2246 }
2247
2248 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2249 {
2250     m_selectionAnchor = from;
2251     m_selectionRange.SetRange(from, to-1);
2252     m_caretPosition = from-1;
2253
2254     Refresh(false);
2255     PositionCaret();
2256 }
2257
2258 // ----------------------------------------------------------------------------
2259 // Editing
2260 // ----------------------------------------------------------------------------
2261
2262 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2263                              const wxString& value)
2264 {
2265     BeginBatchUndo(_("Replace"));
2266
2267     DeleteSelectedContent();
2268
2269     DoWriteText(value, SetValue_SelectionOnly);
2270
2271     EndBatchUndo();
2272 }
2273
2274 void wxRichTextCtrl::Remove(long from, long to)
2275 {
2276     SelectNone();
2277
2278     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to),
2279         m_caretPosition,       // Current caret position
2280         from,                           // New caret position
2281         this);
2282
2283     LayoutContent();
2284     if (!IsFrozen())
2285         Refresh(false);
2286 }
2287
2288 bool wxRichTextCtrl::IsModified() const
2289 {
2290     return m_buffer.IsModified();
2291 }
2292
2293 void wxRichTextCtrl::MarkDirty()
2294 {
2295     m_buffer.Modify(true);
2296 }
2297
2298 void wxRichTextCtrl::DiscardEdits()
2299 {
2300     m_caretPositionForDefaultStyle = -2;
2301     m_buffer.Modify(false);
2302     m_buffer.GetCommandProcessor()->ClearCommands();
2303 }
2304
2305 int wxRichTextCtrl::GetNumberOfLines() const
2306 {
2307     return GetBuffer().GetParagraphCount();
2308 }
2309
2310 // ----------------------------------------------------------------------------
2311 // Positions <-> coords
2312 // ----------------------------------------------------------------------------
2313
2314 long wxRichTextCtrl::XYToPosition(long x, long y) const
2315 {
2316     return GetBuffer().XYToPosition(x, y);
2317 }
2318
2319 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2320 {
2321     return GetBuffer().PositionToXY(pos, x, y);
2322 }
2323
2324 // ----------------------------------------------------------------------------
2325 //
2326 // ----------------------------------------------------------------------------
2327
2328 void wxRichTextCtrl::ShowPosition(long pos)
2329 {
2330     if (!IsPositionVisible(pos))
2331         ScrollIntoView(pos-1, WXK_DOWN);
2332 }
2333
2334 int wxRichTextCtrl::GetLineLength(long lineNo) const
2335 {
2336     return GetBuffer().GetParagraphLength(lineNo);
2337 }
2338
2339 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2340 {
2341     return GetBuffer().GetParagraphText(lineNo);
2342 }
2343
2344 // ----------------------------------------------------------------------------
2345 // Undo/redo
2346 // ----------------------------------------------------------------------------
2347
2348 void wxRichTextCtrl::Undo()
2349 {
2350     if (CanUndo())
2351     {
2352         GetCommandProcessor()->Undo();
2353     }
2354 }
2355
2356 void wxRichTextCtrl::Redo()
2357 {
2358     if (CanRedo())
2359     {
2360         GetCommandProcessor()->Redo();
2361     }
2362 }
2363
2364 bool wxRichTextCtrl::CanUndo() const
2365 {
2366     return GetCommandProcessor()->CanUndo();
2367 }
2368
2369 bool wxRichTextCtrl::CanRedo() const
2370 {
2371     return GetCommandProcessor()->CanRedo();
2372 }
2373
2374 // ----------------------------------------------------------------------------
2375 // implementation details
2376 // ----------------------------------------------------------------------------
2377
2378 void wxRichTextCtrl::Command(wxCommandEvent& event)
2379 {
2380     SetValue(event.GetString());
2381     GetEventHandler()->ProcessEvent(event);
2382 }
2383
2384 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2385 {
2386     // By default, load the first file into the text window.
2387     if (event.GetNumberOfFiles() > 0)
2388     {
2389         LoadFile(event.GetFiles()[0]);
2390     }
2391 }
2392
2393 wxSize wxRichTextCtrl::DoGetBestSize() const
2394 {
2395     return wxSize(10, 10);
2396 }
2397
2398 // ----------------------------------------------------------------------------
2399 // standard handlers for standard edit menu events
2400 // ----------------------------------------------------------------------------
2401
2402 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2403 {
2404     Cut();
2405 }
2406
2407 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2408 {
2409     DeleteSelection();
2410 }
2411
2412 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2413 {
2414     Copy();
2415 }
2416
2417 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2418 {
2419     Paste();
2420 }
2421
2422 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2423 {
2424     Undo();
2425 }
2426
2427 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2428 {
2429     Redo();
2430 }
2431
2432 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2433 {
2434     event.Enable( CanCut() );
2435 }
2436
2437 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2438 {
2439     event.Enable( CanCopy() );
2440 }
2441
2442 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2443 {
2444     event.Enable( CanDeleteSelection() );
2445 }
2446
2447 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2448 {
2449     event.Enable( CanPaste() );
2450 }
2451
2452 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2453 {
2454     event.Enable( CanUndo() );
2455     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2456 }
2457
2458 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2459 {
2460     event.Enable( CanRedo() );
2461     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2462 }
2463
2464 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2465 {
2466     SelectAll();
2467 }
2468
2469 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2470 {
2471     event.Enable(GetLastPosition() > 0);
2472 }
2473
2474 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& WXUNUSED(event))
2475 {
2476     if (!m_contextMenu)
2477     {
2478         m_contextMenu = new wxMenu;
2479         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2480         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2481         m_contextMenu->AppendSeparator();
2482         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2483         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2484         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2485         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2486         m_contextMenu->AppendSeparator();
2487         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2488     }
2489     PopupMenu(m_contextMenu);
2490     return;
2491 }
2492
2493 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttrEx& style)
2494 {
2495     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style);
2496 }
2497
2498 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2499 {
2500     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttrEx(style));
2501 }
2502
2503 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxRichTextAttr& style)
2504 {
2505     return GetBuffer().SetStyle(range.ToInternal(), style);
2506 }
2507
2508 // extended style setting operation with flags including:
2509 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2510 // see richtextbuffer.h for more details.
2511 bool wxRichTextCtrl::SetStyleEx(long start, long end, const wxTextAttrEx& style, int flags)
2512 {
2513     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style, flags);
2514 }
2515
2516 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttrEx& style, int flags)
2517 {
2518     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2519 }
2520
2521 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxRichTextAttr& style, int flags)
2522 {
2523     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2524 }
2525
2526 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttrEx& style)
2527 {
2528     return GetBuffer().SetDefaultStyle(style);
2529 }
2530
2531 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2532 {
2533     return GetBuffer().SetDefaultStyle(wxTextAttrEx(style));
2534 }
2535
2536 const wxTextAttrEx& wxRichTextCtrl::GetDefaultStyleEx() const
2537 {
2538     return GetBuffer().GetDefaultStyle();
2539 }
2540
2541 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2542 {
2543     return GetBuffer().GetDefaultStyle();
2544 }
2545
2546 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2547 {
2548     wxTextAttrEx attr(style);
2549     if (GetBuffer().GetStyle(position, attr))
2550     {
2551         style = attr;
2552         return true;
2553     }
2554     else
2555         return false;
2556 }
2557
2558 bool wxRichTextCtrl::GetStyle(long position, wxTextAttrEx& style)
2559 {
2560     return GetBuffer().GetStyle(position, style);
2561 }
2562
2563 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style)
2564 {
2565     return GetBuffer().GetStyle(position, style);
2566 }
2567
2568 // get the common set of styles for the range
2569 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxRichTextAttr& style)
2570 {
2571     wxTextAttrEx styleEx;
2572     if (GetBuffer().GetStyleForRange(range.ToInternal(), styleEx))
2573     {
2574         style = styleEx;
2575         return true;
2576     }
2577     else
2578         return false;
2579 }
2580
2581 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttrEx& style)
2582 {
2583     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2584 }
2585
2586 /// Get the content (uncombined) attributes for this position.
2587
2588 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2589 {
2590     wxTextAttrEx attr(style);
2591     if (GetBuffer().GetUncombinedStyle(position, attr))
2592     {
2593         style = attr;
2594         return true;
2595     }
2596     else
2597         return false;
2598 }
2599
2600 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttrEx& style)
2601 {
2602     return GetBuffer().GetUncombinedStyle(position, style);
2603 }
2604
2605 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style)
2606 {
2607     return GetBuffer().GetUncombinedStyle(position, style);
2608 }
2609
2610 /// Set font, and also the buffer attributes
2611 bool wxRichTextCtrl::SetFont(const wxFont& font)
2612 {
2613     wxControl::SetFont(font);
2614
2615     wxTextAttrEx attr = GetBuffer().GetAttributes();
2616     attr.SetFont(font);
2617     GetBuffer().SetBasicStyle(attr);
2618
2619     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2620     Refresh(false);
2621
2622     return true;
2623 }
2624
2625 /// Transform logical to physical
2626 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2627 {
2628     wxPoint pt;
2629     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2630
2631     return pt;
2632 }
2633
2634 /// Transform physical to logical
2635 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2636 {
2637     wxPoint pt;
2638     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2639
2640     return pt;
2641 }
2642
2643 /// Position the caret
2644 void wxRichTextCtrl::PositionCaret()
2645 {
2646     if (!GetCaret())
2647         return;
2648
2649     //wxLogDebug(wxT("PositionCaret"));
2650
2651     wxRect caretRect;
2652     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2653     {
2654         wxPoint originalPt = caretRect.GetPosition();
2655         wxPoint pt = GetPhysicalPoint(originalPt);
2656         if (GetCaret()->GetPosition() != pt)
2657         {
2658             GetCaret()->Move(pt);
2659             GetCaret()->SetSize(caretRect.GetSize());
2660         }
2661     }
2662 }
2663
2664 /// Get the caret height and position for the given character position
2665 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2666 {
2667     wxClientDC dc(this);
2668     dc.SetFont(GetFont());
2669
2670     PrepareDC(dc);
2671
2672     wxPoint pt;
2673     int height = 0;
2674
2675     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2676     {
2677         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2678         return true;
2679     }
2680
2681     return false;
2682 }
2683
2684 /// Gets the line for the visible caret position. If the caret is
2685 /// shown at the very end of the line, it means the next character is actually
2686 /// on the following line. So let's get the line we're expecting to find
2687 /// if this is the case.
2688 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2689 {
2690     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2691     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2692     if (line)
2693     {
2694         wxRichTextRange lineRange = line->GetAbsoluteRange();
2695         if (caretPosition == lineRange.GetStart()-1 &&
2696             (para->GetRange().GetStart() != lineRange.GetStart()))
2697         {
2698             if (!m_caretAtLineStart)
2699                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2700         }
2701     }
2702     return line;
2703 }
2704
2705
2706 /// Move the caret to the given character position
2707 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2708 {
2709     if (GetBuffer().GetDirty())
2710         LayoutContent();
2711
2712     if (pos <= GetBuffer().GetRange().GetEnd())
2713     {
2714         SetCaretPosition(pos, showAtLineStart);
2715
2716         PositionCaret();
2717
2718         return true;
2719     }
2720     else
2721         return false;
2722 }
2723
2724 /// Layout the buffer: which we must do before certain operations, such as
2725 /// setting the caret position.
2726 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2727 {
2728     if (GetBuffer().GetDirty() || onlyVisibleRect)
2729     {
2730         wxRect availableSpace(GetClientSize());
2731         if (availableSpace.width == 0)
2732             availableSpace.width = 10;
2733         if (availableSpace.height == 0)
2734             availableSpace.height = 10;
2735
2736         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2737         if (onlyVisibleRect)
2738         {
2739             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2740             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2741         }
2742
2743         wxClientDC dc(this);
2744         dc.SetFont(GetFont());
2745
2746         PrepareDC(dc);
2747
2748         GetBuffer().Defragment();
2749         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2750         GetBuffer().Layout(dc, availableSpace, flags);
2751         GetBuffer().SetDirty(false);
2752
2753         if (!IsFrozen())
2754             SetupScrollbars();
2755     }
2756
2757     return true;
2758 }
2759
2760 /// Is all of the selection bold?
2761 bool wxRichTextCtrl::IsSelectionBold()
2762 {
2763     if (HasSelection())
2764     {
2765         wxRichTextAttr attr;
2766         wxRichTextRange range = GetSelectionRange();
2767         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2768         attr.SetFontWeight(wxBOLD);
2769
2770         return HasCharacterAttributes(range, attr);
2771     }
2772     else
2773     {
2774         // If no selection, then we need to combine current style with default style
2775         // to see what the effect would be if we started typing.
2776         wxRichTextAttr attr;
2777         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2778
2779         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2780         if (GetStyle(pos, attr))
2781         {
2782             if (IsDefaultStyleShowing())
2783                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2784             return attr.GetFontWeight() == wxBOLD;
2785         }
2786     }
2787     return false;
2788 }
2789
2790 /// Is all of the selection italics?
2791 bool wxRichTextCtrl::IsSelectionItalics()
2792 {
2793     if (HasSelection())
2794     {
2795         wxRichTextRange range = GetSelectionRange();
2796         wxRichTextAttr attr;
2797         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2798         attr.SetFontStyle(wxITALIC);
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_ITALIC);
2808
2809         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2810         if (GetStyle(pos, attr))
2811         {
2812             if (IsDefaultStyleShowing())
2813                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2814             return attr.GetFontStyle() == wxITALIC;
2815         }
2816     }
2817     return false;
2818 }
2819
2820 /// Is all of the selection underlined?
2821 bool wxRichTextCtrl::IsSelectionUnderlined()
2822 {
2823     if (HasSelection())
2824     {
2825         wxRichTextRange range = GetSelectionRange();
2826         wxRichTextAttr attr;
2827         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2828         attr.SetFontUnderlined(true);
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_UNDERLINE);
2838         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2839
2840         if (GetStyle(pos, attr))
2841         {
2842             if (IsDefaultStyleShowing())
2843                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2844             return attr.GetFontUnderlined();
2845         }
2846     }
2847     return false;
2848 }
2849
2850 /// Apply bold to the selection
2851 bool wxRichTextCtrl::ApplyBoldToSelection()
2852 {
2853     wxRichTextAttr attr;
2854     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2855     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
2856
2857     if (HasSelection())
2858         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2859     else
2860         SetAndShowDefaultStyle(attr);
2861     return true;
2862 }
2863
2864 /// Apply italic to the selection
2865 bool wxRichTextCtrl::ApplyItalicToSelection()
2866 {
2867     wxRichTextAttr attr;
2868     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2869     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
2870
2871     if (HasSelection())
2872         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2873     else
2874         SetAndShowDefaultStyle(attr);
2875     return true;
2876 }
2877
2878 /// Apply underline to the selection
2879 bool wxRichTextCtrl::ApplyUnderlineToSelection()
2880 {
2881     wxRichTextAttr attr;
2882     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2883     attr.SetFontUnderlined(!IsSelectionUnderlined());
2884
2885     if (HasSelection())
2886         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2887     else
2888         SetAndShowDefaultStyle(attr);
2889     return true;
2890 }
2891
2892 /// Is all of the selection aligned according to the specified flag?
2893 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
2894 {
2895     wxRichTextRange range;
2896     if (HasSelection())
2897         range = GetSelectionRange();
2898     else
2899         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
2900
2901     wxRichTextAttr attr;
2902     attr.SetAlignment(alignment);
2903
2904     return HasParagraphAttributes(range, attr);
2905 }
2906
2907 /// Apply alignment to the selection
2908 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
2909 {
2910     wxRichTextAttr attr;
2911     attr.SetAlignment(alignment);
2912     if (HasSelection())
2913         return SetStyle(GetSelectionRange(), attr);
2914     else
2915     {
2916         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
2917         if (para)
2918             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
2919     }
2920     return true;
2921 }
2922
2923 /// Apply a named style to the selection
2924 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
2925 {
2926     // Flags are defined within each definition, so only certain
2927     // attributes are applied.
2928     wxRichTextAttr attr(def->GetStyle());
2929
2930     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE;
2931
2932     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
2933     {
2934         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2935
2936         wxRichTextRange range;
2937
2938         if (HasSelection())
2939             range = GetSelectionRange();
2940         else
2941         {
2942             long pos = GetAdjustedCaretPosition(GetCaretPosition());
2943             range = wxRichTextRange(pos, pos+1);
2944         }
2945
2946         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
2947     }
2948
2949     // Make sure the attr has the style name
2950     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
2951     {
2952         attr.SetParagraphStyleName(def->GetName());
2953
2954         // If applying a paragraph style, we only want the paragraph nodes to adopt these
2955         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
2956         // to change its style independently.
2957         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2958     }
2959     else
2960         attr.SetCharacterStyleName(def->GetName());
2961
2962     if (HasSelection())
2963         return SetStyleEx(GetSelectionRange(), attr, flags);
2964     else
2965     {
2966         SetAndShowDefaultStyle(attr);
2967         return true;
2968     }
2969 }
2970
2971 /// Apply the style sheet to the buffer, for example if the styles have changed.
2972 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
2973 {
2974     if (!styleSheet)
2975         styleSheet = GetBuffer().GetStyleSheet();
2976     if (!styleSheet)
2977         return false;
2978
2979     if (GetBuffer().ApplyStyleSheet(styleSheet))
2980     {
2981         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2982         Refresh(false);
2983         return true;
2984     }
2985     else
2986         return false;
2987 }
2988
2989 /// Sets the default style to the style under the cursor
2990 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
2991 {
2992     wxTextAttrEx attr;
2993     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
2994
2995     // If at the start of a paragraph, use the next position.
2996     long pos = GetAdjustedCaretPosition(GetCaretPosition());
2997
2998     if (GetUncombinedStyle(pos, attr))
2999     {
3000         SetDefaultStyle(attr);
3001         return true;
3002     }
3003
3004     return false;
3005 }
3006
3007 /// Returns the first visible position in the current view
3008 long wxRichTextCtrl::GetFirstVisiblePosition() const
3009 {
3010     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3011     if (line)
3012         return line->GetAbsoluteRange().GetStart();
3013     else
3014         return 0;
3015 }
3016
3017 /// Get the first visible point in the window
3018 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3019 {
3020     int ppuX, ppuY;
3021     int startXUnits, startYUnits;
3022
3023     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3024     GetViewStart(& startXUnits, & startYUnits);
3025
3026     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3027 }
3028
3029 /// The adjusted caret position is the character position adjusted to take
3030 /// into account whether we're at the start of a paragraph, in which case
3031 /// style information should be taken from the next position, not current one.
3032 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3033 {
3034     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3035
3036     if (para && (caretPos+1 == para->GetRange().GetStart()))
3037         caretPos ++;
3038     return caretPos;
3039 }
3040
3041 /// Get/set the selection range in character positions. -1, -1 means no selection.
3042 /// The range is in API convention, i.e. a single character selection is denoted
3043 /// by (n, n+1)
3044 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3045 {
3046     wxRichTextRange range = GetInternalSelectionRange();
3047     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3048         range.SetEnd(range.GetEnd() + 1);
3049     return range;
3050 }
3051
3052 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3053 {
3054     wxRichTextRange range1(range);
3055     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3056         range1.SetEnd(range1.GetEnd() - 1);
3057
3058     wxASSERT( range1.GetStart() > range1.GetEnd() );
3059
3060     SetInternalSelectionRange(range1);
3061 }
3062
3063 /// Set list style
3064 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3065 {
3066     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3067 }
3068
3069 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3070 {
3071     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3072 }
3073
3074 /// Clear list for given range
3075 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3076 {
3077     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3078 }
3079
3080 /// Number/renumber any list elements in the given range
3081 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3082 {
3083     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3084 }
3085
3086 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3087 {
3088     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3089 }
3090
3091 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3092 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3093 {
3094     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3095 }
3096
3097 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3098 {
3099     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3100 }
3101
3102 /// Deletes the content in the given range
3103 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3104 {
3105     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3106 }
3107
3108 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3109 {
3110     if (sm_availableFontNames.GetCount() == 0)
3111     {
3112         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3113         sm_availableFontNames.Sort();
3114     }
3115     return sm_availableFontNames;
3116 }
3117
3118 void wxRichTextCtrl::ClearAvailableFontNames()
3119 {
3120     sm_availableFontNames.Clear();
3121 }
3122
3123 #endif
3124     // wxUSE_RICHTEXT