src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richeditctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/textfile.h"
  30 #include "wx/ffile.h"
  31 #include "wx/filename.h"
  32 #include "wx/dcbuffer.h"
  33 #include "wx/arrimpl.cpp"
  34 #include "wx/fontenum.h"
  35
  36 // DLL options compatibility check:
  37 #include "wx/app.h"
  38 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  39
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_ITEM_SELECTED)
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_ITEM_DESELECTED)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_CLICK)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK)
  45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK)
  46 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RETURN)
  47 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING)
  48 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED)
  49 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING)
  50 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED)
  51
  52 IMPLEMENT_CLASS( wxRichTextCtrl, wxControl )
  53
  54 IMPLEMENT_CLASS( wxRichTextEvent, wxNotifyEvent )
  55
  56 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
  57     EVT_PAINT(wxRichTextCtrl::OnPaint)
  58     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
  59     EVT_IDLE(wxRichTextCtrl::OnIdle)
  60     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
  61     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
  62     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
  63     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
  64     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
  65     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
  66     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
  67     EVT_CHAR(wxRichTextCtrl::OnChar)
  68     EVT_SIZE(wxRichTextCtrl::OnSize)
  69     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
  70     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
  71     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
  72
  73     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
  74     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
  75
  76     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
  77     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
  78
  79     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
  80     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
  81
  82     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
  83     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
  84
  85     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
  86     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
  87
  88     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
  89     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
  90
  91     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
  92     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
  93 END_EVENT_TABLE()
  94
  95 /*!
  96  * wxRichTextCtrl
  97  */
  98
  99 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 100
 101 wxRichTextCtrl::wxRichTextCtrl()
 102               : wxScrollHelper(this)
 103 {
 104     Init();
 105 }
 106
 107 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 108                                wxWindowID id,
 109                                const wxString& value,
 110                                const wxPoint& pos,
 111                                const wxSize& size,
 112                                long style,
 113                                const wxValidator& validator,
 114                                const wxString& name)
 115               : wxScrollHelper(this)
 116 {
 117     Init();
 118     Create(parent, id, value, pos, size, style, validator, name);
 119 }
 120
 121 /// Creation
 122 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 123                              const wxValidator& validator, const wxString& name)
 124 {
 125     if (!wxTextCtrlBase::Create(parent, id, pos, size,
 126                                 style|wxFULL_REPAINT_ON_RESIZE,
 127                                 validator, name))
 128         return false;
 129
 130     if (!GetFont().Ok())
 131     {
 132         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 133     }
 134
 135     GetBuffer().Reset();
 136     GetBuffer().SetRichTextCtrl(this);
 137
 138     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 139     GetCaret()->Show();
 140
 141     if (style & wxTE_READONLY)
 142         SetEditable(false);
 143
 144     // The base attributes must all have default values
 145     wxTextAttrEx attributes;
 146     attributes.SetFont(GetFont());
 147     attributes.SetTextColour(*wxBLACK);
 148     attributes.SetBackgroundColour(*wxWHITE);
 149     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 150     attributes.SetLineSpacing(10);
 151     attributes.SetParagraphSpacingAfter(10);
 152     attributes.SetParagraphSpacingBefore(0);
 153     attributes.SetTextEffects(0);
 154     attributes.SetTextEffectFlags(wxTEXT_ATTR_EFFECT_STRIKETHROUGH|wxTEXT_ATTR_EFFECT_CAPITALS);
 155
 156     SetBasicStyle(attributes);
 157
 158     // The default attributes will be merged with base attributes, so
 159     // can be empty to begin with
 160     wxTextAttrEx defaultAttributes;
 161     SetDefaultStyle(defaultAttributes);
 162
 163     SetBackgroundColour(*wxWHITE);
 164     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 165
 166     // Tell the sizers to use the given or best size
 167     SetInitialSize(size);
 168
 169 #if wxRICHTEXT_BUFFERED_PAINTING
 170     // Create a buffer
 171     RecreateBuffer(size);
 172 #endif
 173
 174     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 175     m_urlCursor = wxCursor(wxCURSOR_HAND);
 176
 177     SetCursor(m_textCursor);
 178
 179     if (!value.IsEmpty())
 180         SetValue(value);
 181
 182     GetBuffer().AddEventHandler(this);
 183
 184     return true;
 185 }
 186
 187 wxRichTextCtrl::~wxRichTextCtrl()
 188 {
 189     GetBuffer().RemoveEventHandler(this);
 190
 191     delete m_contextMenu;
 192 }
 193
 194 /// Member initialisation
 195 void wxRichTextCtrl::Init()
 196 {
 197     m_freezeCount = 0;
 198     m_contextMenu = NULL;
 199     m_caret = NULL;
 200     m_caretPosition = -1;
 201     m_selectionRange.SetRange(-2, -2);
 202     m_selectionAnchor = -2;
 203     m_editable = true;
 204     m_caretAtLineStart = false;
 205     m_dragging = false;
 206     m_fullLayoutRequired = false;
 207     m_fullLayoutTime = 0;
 208     m_fullLayoutSavedPosition = 0;
 209     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 210     m_caretPositionForDefaultStyle = -2;
 211 }
 212
 213 /// Call Freeze to prevent refresh
 214 void wxRichTextCtrl::Freeze()
 215 {
 216     m_freezeCount ++;
 217 }
 218
 219 /// Call Thaw to refresh
 220 void wxRichTextCtrl::Thaw()
 221 {
 222     m_freezeCount --;
 223
 224     if (m_freezeCount == 0)
 225     {
 226         SetupScrollbars();
 227         Refresh(false);
 228     }
 229 }
 230
 231 /// Clear all text
 232 void wxRichTextCtrl::Clear()
 233 {
 234     m_buffer.ResetAndClearCommands();
 235     m_buffer.SetDirty(true);
 236     m_caretPosition = -1;
 237     m_caretPositionForDefaultStyle = -2;
 238     m_caretAtLineStart = false;
 239     m_selectionRange.SetRange(-2, -2);
 240
 241     SetScrollbars(0, 0, 0, 0, 0, 0);
 242
 243     if (m_freezeCount == 0)
 244     {
 245         SetupScrollbars();
 246         Refresh(false);
 247     }
 248     SendTextUpdatedEvent();
 249 }
 250
 251 /// Painting
 252 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 253 {
 254     if (GetCaret() && GetCaret()->IsVisible())
 255         GetCaret()->Hide();
 256
 257     {
 258 #if wxRICHTEXT_BUFFERED_PAINTING
 259         wxBufferedPaintDC dc(this, m_bufferBitmap);
 260 #else
 261         wxPaintDC dc(this);
 262 #endif
 263         PrepareDC(dc);
 264
 265         if (m_freezeCount > 0)
 266             return;
 267
 268         dc.SetFont(GetFont());
 269
 270         // Paint the background
 271         PaintBackground(dc);
 272
 273         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 274
 275         wxRect drawingArea(GetUpdateRegion().GetBox());
 276         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 277
 278         wxRect availableSpace(GetClientSize());
 279         if (GetBuffer().GetDirty())
 280         {
 281             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 282             GetBuffer().SetDirty(false);
 283             SetupScrollbars();
 284         }
 285
 286         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 287     }
 288
 289     if (GetCaret() && !GetCaret()->IsVisible())
 290         GetCaret()->Show();
 291
 292     PositionCaret();
 293 }
 294
 295 // Empty implementation, to prevent flicker
 296 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 297 {
 298 }
 299
 300 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 301 {
 302     if (GetCaret())
 303     {
 304         if (!GetCaret()->IsVisible())
 305             GetCaret()->Show();
 306         PositionCaret();
 307     }
 308
 309     // if (!IsFrozen())
 310     //    Refresh(false);
 311 }
 312
 313 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 314 {
 315     if (GetCaret() && GetCaret()->IsVisible())
 316         GetCaret()->Hide();
 317
 318     // if (!IsFrozen())
 319     //    Refresh(false);
 320 }
 321
 322 /// Left-click
 323 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 324 {
 325     SetFocus();
 326
 327     wxClientDC dc(this);
 328     PrepareDC(dc);
 329     dc.SetFont(GetFont());
 330
 331     long position = 0;
 332     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 333
 334     if (hit != wxRICHTEXT_HITTEST_NONE)
 335     {
 336         m_dragStart = event.GetLogicalPosition(dc);
 337         m_dragging = true;
 338         CaptureMouse();
 339
 340         SelectNone();
 341
 342         bool caretAtLineStart = false;
 343
 344         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 345         {
 346             // If we're at the start of a line (but not first in para)
 347             // then we should keep the caret showing at the start of the line
 348             // by showing the m_caretAtLineStart flag.
 349             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 350             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 351
 352             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 353                 caretAtLineStart = true;
 354             position --;
 355         }
 356
 357         MoveCaret(position, caretAtLineStart);
 358         SetDefaultStyleToCursorStyle();
 359     }
 360
 361     event.Skip();
 362 }
 363
 364 /// Left-up
 365 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 366 {
 367     if (m_dragging)
 368     {
 369         m_dragging = false;
 370         if (GetCapture() == this)
 371             ReleaseMouse();
 372
 373         // See if we clicked on a URL
 374         wxClientDC dc(this);
 375         PrepareDC(dc);
 376         dc.SetFont(GetFont());
 377
 378         long position = 0;
 379         wxPoint logicalPt = event.GetLogicalPosition(dc);
 380         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 381
 382         if (hit != wxRICHTEXT_HITTEST_NONE)
 383         {
 384             wxTextAttrEx attr;
 385             if (GetStyle(position, attr))
 386             {
 387                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 388                 {
 389                     wxString urlTarget = attr.GetURL();
 390                     if (!urlTarget.IsEmpty())
 391                     {
 392                         wxMouseEvent mouseEvent(event);
 393
 394                         long startPos = 0, endPos = 0;
 395                         wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 396                         if (obj)
 397                         {
 398                             startPos = obj->GetRange().GetStart();
 399                             endPos = obj->GetRange().GetEnd();
 400                         }
 401
 402                         wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 403                         InitCommandEvent(urlEvent);
 404
 405                         urlEvent.SetString(urlTarget);
 406
 407                         GetEventHandler()->ProcessEvent(urlEvent);
 408                     }
 409                 }
 410             }
 411         }
 412     }
 413 }
 414
 415 /// Left-click
 416 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 417 {
 418     wxClientDC dc(this);
 419     PrepareDC(dc);
 420     dc.SetFont(GetFont());
 421
 422     long position = 0;
 423     wxPoint logicalPt = event.GetLogicalPosition(dc);
 424     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 425
 426     // See if we need to change the cursor
 427
 428     {
 429         if (hit != wxRICHTEXT_HITTEST_NONE)
 430         {
 431             wxTextAttrEx attr;
 432             if (GetStyle(position, attr))
 433             {
 434                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 435                 {
 436                     SetCursor(m_urlCursor);
 437                 }
 438                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 439                 {
 440                     SetCursor(m_textCursor);
 441                 }
 442             }
 443         }
 444     }
 445
 446     if (!event.Dragging())
 447     {
 448         event.Skip();
 449         return;
 450     }
 451
 452     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 453     {
 454         // TODO: test closeness
 455
 456         bool caretAtLineStart = false;
 457
 458         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 459         {
 460             // If we're at the start of a line (but not first in para)
 461             // then we should keep the caret showing at the start of the line
 462             // by showing the m_caretAtLineStart flag.
 463             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 464             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 465
 466             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 467                 caretAtLineStart = true;
 468             position --;
 469         }
 470
 471         if (m_caretPosition != position)
 472         {
 473             bool extendSel = ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 474
 475             MoveCaret(position, caretAtLineStart);
 476             SetDefaultStyleToCursorStyle();
 477
 478             if (extendSel)
 479                 Refresh(false);
 480         }
 481     }
 482 }
 483
 484 /// Right-click
 485 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 486 {
 487     SetFocus();
 488     event.Skip();
 489 }
 490
 491 /// Left-double-click
 492 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& event)
 493 {
 494     SelectWord(GetCaretPosition()+1);
 495     event.Skip();
 496 }
 497
 498 /// Middle-click
 499 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 500 {
 501     event.Skip();
 502 }
 503
 504 /// Key press
 505 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 506 {
 507     int flags = 0;
 508     if (event.CmdDown())
 509         flags |= wxRICHTEXT_CTRL_DOWN;
 510     if (event.ShiftDown())
 511         flags |= wxRICHTEXT_SHIFT_DOWN;
 512     if (event.AltDown())
 513         flags |= wxRICHTEXT_ALT_DOWN;
 514
 515     if (event.GetKeyCode() == WXK_LEFT ||
 516         event.GetKeyCode() == WXK_RIGHT ||
 517         event.GetKeyCode() == WXK_UP ||
 518         event.GetKeyCode() == WXK_DOWN ||
 519         event.GetKeyCode() == WXK_HOME ||
 520         event.GetKeyCode() == WXK_PAGEUP ||
 521         event.GetKeyCode() == WXK_PAGEDOWN ||
 522         event.GetKeyCode() == WXK_END ||
 523
 524         event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 525         event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 526         event.GetKeyCode() == WXK_NUMPAD_UP ||
 527         event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 528         event.GetKeyCode() == WXK_NUMPAD_HOME ||
 529         event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 530         event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 531         event.GetKeyCode() == WXK_NUMPAD_END)
 532     {
 533         KeyboardNavigate(event.GetKeyCode(), flags);
 534         return;
 535     }
 536
 537     // all the other keys modify the controls contents which shouldn't be
 538     // possible if we're read-only
 539     if ( !IsEditable() )
 540     {
 541         event.Skip();
 542         return;
 543     }
 544
 545     if (event.GetKeyCode() == WXK_RETURN)
 546     {
 547         BeginBatchUndo(_("Insert Text"));
 548
 549         long newPos = m_caretPosition;
 550
 551         DeleteSelectedContent(& newPos);
 552
 553         GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
 554         EndBatchUndo();
 555         SetDefaultStyleToCursorStyle();
 556
 557         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 558
 559         wxRichTextEvent cmdEvent(
 560             wxEVT_COMMAND_RICHTEXT_RETURN,
 561             GetId());
 562         cmdEvent.SetEventObject(this);
 563         cmdEvent.SetFlags(flags);
 564         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 565         {
 566             // Generate conventional event
 567             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 568             InitCommandEvent(textEvent);
 569
 570             GetEventHandler()->ProcessEvent(textEvent);
 571         }
 572         Update();
 573     }
 574     else if (event.GetKeyCode() == WXK_BACK)
 575     {
 576         BeginBatchUndo(_("Delete Text"));
 577
 578         // Submit range in character positions, which are greater than caret positions,
 579         // so subtract 1 for deleted character and add 1 for conversion to character position.
 580         if (m_caretPosition > -1 && !HasSelection())
 581         {
 582             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition, m_caretPosition),
 583                 m_caretPosition,   // Current caret position
 584                 m_caretPosition-1, // New caret position
 585                 this);
 586         }
 587         else
 588             DeleteSelectedContent();
 589
 590         EndBatchUndo();
 591
 592         if (GetLastPosition() == -1)
 593         {
 594             GetBuffer().Reset();
 595
 596             m_caretPosition = -1;
 597             PositionCaret();
 598             SetDefaultStyleToCursorStyle();
 599         }
 600
 601         ScrollIntoView(m_caretPosition, WXK_LEFT);
 602         Update();
 603     }
 604     else if (event.GetKeyCode() == WXK_DELETE)
 605     {
 606         BeginBatchUndo(_("Delete Text"));
 607
 608         // Submit range in character positions, which are greater than caret positions,
 609         if (m_caretPosition < GetBuffer().GetRange().GetEnd()+1 && !HasSelection())
 610         {
 611             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition+1, m_caretPosition+1),
 612                 m_caretPosition,   // Current caret position
 613                 m_caretPosition+1, // New caret position
 614                 this);
 615         }
 616         else
 617             DeleteSelectedContent();
 618
 619         EndBatchUndo();
 620
 621         if (GetLastPosition() == -1)
 622         {
 623             GetBuffer().Reset();
 624
 625             m_caretPosition = -1;
 626             PositionCaret();
 627             SetDefaultStyleToCursorStyle();
 628         }
 629         Update();
 630     }
 631     else
 632     {
 633         long keycode = event.GetKeyCode();
 634         switch ( keycode )
 635         {
 636             case WXK_ESCAPE:
 637             // case WXK_SPACE:
 638             case WXK_DELETE:
 639             case WXK_START:
 640             case WXK_LBUTTON:
 641             case WXK_RBUTTON:
 642             case WXK_CANCEL:
 643             case WXK_MBUTTON:
 644             case WXK_CLEAR:
 645             case WXK_SHIFT:
 646             case WXK_ALT:
 647             case WXK_CONTROL:
 648             case WXK_MENU:
 649             case WXK_PAUSE:
 650             case WXK_CAPITAL:
 651             case WXK_END:
 652             case WXK_HOME:
 653             case WXK_LEFT:
 654             case WXK_UP:
 655             case WXK_RIGHT:
 656             case WXK_DOWN:
 657             case WXK_SELECT:
 658             case WXK_PRINT:
 659             case WXK_EXECUTE:
 660             case WXK_SNAPSHOT:
 661             case WXK_INSERT:
 662             case WXK_HELP:
 663             case WXK_NUMPAD0:
 664             case WXK_NUMPAD1:
 665             case WXK_NUMPAD2:
 666             case WXK_NUMPAD3:
 667             case WXK_NUMPAD4:
 668             case WXK_NUMPAD5:
 669             case WXK_NUMPAD6:
 670             case WXK_NUMPAD7:
 671             case WXK_NUMPAD8:
 672             case WXK_NUMPAD9:
 673             case WXK_MULTIPLY:
 674             case WXK_ADD:
 675             case WXK_SEPARATOR:
 676             case WXK_SUBTRACT:
 677             case WXK_DECIMAL:
 678             case WXK_DIVIDE:
 679             case WXK_F1:
 680             case WXK_F2:
 681             case WXK_F3:
 682             case WXK_F4:
 683             case WXK_F5:
 684             case WXK_F6:
 685             case WXK_F7:
 686             case WXK_F8:
 687             case WXK_F9:
 688             case WXK_F10:
 689             case WXK_F11:
 690             case WXK_F12:
 691             case WXK_F13:
 692             case WXK_F14:
 693             case WXK_F15:
 694             case WXK_F16:
 695             case WXK_F17:
 696             case WXK_F18:
 697             case WXK_F19:
 698             case WXK_F20:
 699             case WXK_F21:
 700             case WXK_F22:
 701             case WXK_F23:
 702             case WXK_F24:
 703             case WXK_NUMLOCK:
 704             case WXK_SCROLL:
 705             case WXK_PAGEUP:
 706             case WXK_PAGEDOWN:
 707             case WXK_NUMPAD_SPACE:
 708             case WXK_NUMPAD_TAB:
 709             case WXK_NUMPAD_ENTER:
 710             case WXK_NUMPAD_F1:
 711             case WXK_NUMPAD_F2:
 712             case WXK_NUMPAD_F3:
 713             case WXK_NUMPAD_F4:
 714             case WXK_NUMPAD_HOME:
 715             case WXK_NUMPAD_LEFT:
 716             case WXK_NUMPAD_UP:
 717             case WXK_NUMPAD_RIGHT:
 718             case WXK_NUMPAD_DOWN:
 719             case WXK_NUMPAD_PAGEUP:
 720             case WXK_NUMPAD_PAGEDOWN:
 721             case WXK_NUMPAD_END:
 722             case WXK_NUMPAD_BEGIN:
 723             case WXK_NUMPAD_INSERT:
 724             case WXK_NUMPAD_DELETE:
 725             case WXK_NUMPAD_EQUAL:
 726             case WXK_NUMPAD_MULTIPLY:
 727             case WXK_NUMPAD_ADD:
 728             case WXK_NUMPAD_SEPARATOR:
 729             case WXK_NUMPAD_SUBTRACT:
 730             case WXK_NUMPAD_DECIMAL:
 731             {
 732                 event.Skip();
 733                 return;
 734             }
 735
 736             default:
 737             {
 738                 if (event.CmdDown() || event.AltDown())
 739                 {
 740                     event.Skip();
 741                     return;
 742                 }
 743
 744                 if (keycode == wxT('\t'))
 745                 {
 746                     // See if we need to promote or demote the selection or paragraph at the cursor
 747                     // position, instead of inserting a tab.
 748                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
 749                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
 750                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
 751                     {
 752                         wxRichTextRange range;
 753                         if (HasSelection())
 754                             range = GetSelectionRange();
 755                         else
 756                             range = para->GetRange().FromInternal();
 757
 758                         int promoteBy = event.ShiftDown() ? 1 : -1;
 759
 760                         PromoteList(promoteBy, range, NULL);
 761
 762                         return;
 763                     }
 764                 }
 765
 766                 BeginBatchUndo(_("Insert Text"));
 767
 768                 long newPos = m_caretPosition;
 769                 DeleteSelectedContent(& newPos);
 770
 771                 wxString str = (wxChar) event.GetKeyCode();
 772                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
 773
 774                 EndBatchUndo();
 775
 776                 SetDefaultStyleToCursorStyle();
 777                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
 778                 Update();
 779             }
 780         }
 781     }
 782 }
 783
 784 /// Delete content if there is a selection, e.g. when pressing a key.
 785 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
 786 {
 787     if (HasSelection())
 788     {
 789         long pos = m_selectionRange.GetStart();
 790         GetBuffer().DeleteRangeWithUndo(m_selectionRange,
 791             m_caretPosition,       // Current caret position
 792             pos,    // New caret position
 793             this);
 794         m_selectionRange.SetRange(-2, -2);
 795
 796         if (newPos)
 797             *newPos = pos-1;
 798         return true;
 799     }
 800     else
 801         return false;
 802 }
 803
 804 /// Keyboard navigation
 805
 806 /*
 807
 808 Left:       left one character
 809 Right:      right one character
 810 Up:         up one line
 811 Down:       down one line
 812 Ctrl-Left:  left one word
 813 Ctrl-Right: right one word
 814 Ctrl-Up:    previous paragraph start
 815 Ctrl-Down:  next start of paragraph
 816 Home:       start of line
 817 End:        end of line
 818 Ctrl-Home:  start of document
 819 Ctrl-End:   end of document
 820 Page-Up:    Up a screen
 821 Page-Down:  Down a screen
 822
 823 Maybe:
 824
 825 Ctrl-Alt-PgUp: Start of window
 826 Ctrl-Alt-PgDn: End of window
 827 F8:         Start selection mode
 828 Esc:        End selection mode
 829
 830 Adding Shift does the above but starts/extends selection.
 831
 832
 833  */
 834
 835 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
 836 {
 837     bool success = false;
 838
 839     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
 840     {
 841         if (flags & wxRICHTEXT_CTRL_DOWN)
 842             success = WordRight(1, flags);
 843         else
 844             success = MoveRight(1, flags);
 845     }
 846     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
 847     {
 848         if (flags & wxRICHTEXT_CTRL_DOWN)
 849             success = WordLeft(1, flags);
 850         else
 851             success = MoveLeft(1, flags);
 852     }
 853     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
 854     {
 855         if (flags & wxRICHTEXT_CTRL_DOWN)
 856             success = MoveToParagraphStart(flags);
 857         else
 858             success = MoveUp(1, flags);
 859     }
 860     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
 861     {
 862         if (flags & wxRICHTEXT_CTRL_DOWN)
 863             success = MoveToParagraphEnd(flags);
 864         else
 865             success = MoveDown(1, flags);
 866     }
 867     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
 868     {
 869         success = PageUp(1, flags);
 870     }
 871     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
 872     {
 873         success = PageDown(1, flags);
 874     }
 875     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
 876     {
 877         if (flags & wxRICHTEXT_CTRL_DOWN)
 878             success = MoveHome(flags);
 879         else
 880             success = MoveToLineStart(flags);
 881     }
 882     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
 883     {
 884         if (flags & wxRICHTEXT_CTRL_DOWN)
 885             success = MoveEnd(flags);
 886         else
 887             success = MoveToLineEnd(flags);
 888     }
 889
 890     if (success)
 891     {
 892         ScrollIntoView(m_caretPosition, keyCode);
 893         SetDefaultStyleToCursorStyle();
 894     }
 895
 896     return success;
 897 }
 898
 899 /// Extend the selection. Selections are in caret positions.
 900 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
 901 {
 902     if (flags & wxRICHTEXT_SHIFT_DOWN)
 903     {
 904         // If not currently selecting, start selecting
 905         if (m_selectionRange.GetStart() == -2)
 906         {
 907             m_selectionAnchor = oldPos;
 908
 909             if (oldPos > newPos)
 910                 m_selectionRange.SetRange(newPos+1, oldPos);
 911             else
 912                 m_selectionRange.SetRange(oldPos+1, newPos);
 913         }
 914         else
 915         {
 916             // Always ensure that the selection range start is greater than
 917             // the end.
 918             if (newPos > m_selectionAnchor)
 919                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
 920             else
 921                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
 922         }
 923
 924         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
 925         {
 926             wxLogDebug(wxT("Strange selection range"));
 927         }
 928
 929         return true;
 930     }
 931     else
 932         return false;
 933 }
 934
 935 /// Scroll into view, returning true if we scrolled.
 936 /// This takes a _caret_ position.
 937 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
 938 {
 939     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
 940
 941     if (!line)
 942         return false;
 943
 944     int ppuX, ppuY;
 945     GetScrollPixelsPerUnit(& ppuX, & ppuY);
 946
 947     int startXUnits, startYUnits;
 948     GetViewStart(& startXUnits, & startYUnits);
 949     int startY = startYUnits * ppuY;
 950
 951     int sx = 0, sy = 0;
 952     GetVirtualSize(& sx, & sy);
 953     int sxUnits = 0;
 954     int syUnits = 0;
 955     if (ppuY != 0)
 956         syUnits = sy/ppuY;
 957
 958     wxRect rect = line->GetRect();
 959
 960     bool scrolled = false;
 961
 962     wxSize clientSize = GetClientSize();
 963
 964     // Going down
 965     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
 966         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_DOWN ||
 967         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
 968         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
 969     {
 970         if ((rect.y + rect.height) > (clientSize.y + startY))
 971         {
 972             // Make it scroll so this item is at the bottom
 973             // of the window
 974             int y = rect.y - (clientSize.y - rect.height);
 975             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
 976
 977             // If we're still off the screen, scroll another line down
 978             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
 979                 yUnits ++;
 980
 981             if (startYUnits != yUnits)
 982             {
 983                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
 984                 scrolled = true;
 985             }
 986         }
 987         else if (rect.y < startY)
 988         {
 989             // Make it scroll so this item is at the top
 990             // of the window
 991             int y = rect.y ;
 992             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
 993
 994             if (startYUnits != yUnits)
 995             {
 996                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
 997                 scrolled = true;
 998             }
 999         }
1000     }
1001     // Going up
1002     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1003              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1004              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1005              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1006     {
1007         if (rect.y < startY)
1008         {
1009             // Make it scroll so this item is at the top
1010             // of the window
1011             int y = rect.y ;
1012             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1013
1014             if (startYUnits != yUnits)
1015             {
1016                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1017                 scrolled = true;
1018             }
1019         }
1020         else if ((rect.y + rect.height) > (clientSize.y + startY))
1021         {
1022             // Make it scroll so this item is at the bottom
1023             // of the window
1024             int y = rect.y - (clientSize.y - rect.height);
1025             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1026
1027             // If we're still off the screen, scroll another line down
1028             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1029                 yUnits ++;
1030
1031             if (startYUnits != yUnits)
1032             {
1033                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1034                 scrolled = true;
1035             }
1036         }
1037     }
1038     PositionCaret();
1039
1040     return scrolled;
1041 }
1042
1043 /// Is the given position visible on the screen?
1044 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1045 {
1046     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1047
1048     if (!line)
1049         return false;
1050
1051     int ppuX, ppuY;
1052     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1053
1054     int startX, startY;
1055     GetViewStart(& startX, & startY);
1056     startX = 0;
1057     startY = startY * ppuY;
1058
1059     int sx = 0, sy = 0;
1060     GetVirtualSize(& sx, & sy);
1061     sx = 0;
1062     if (ppuY != 0)
1063         sy = sy/ppuY;
1064
1065     wxRect rect = line->GetRect();
1066
1067     wxSize clientSize = GetClientSize();
1068
1069     return !(((rect.y + rect.height) > (clientSize.y + startY)) || rect.y < startY);
1070 }
1071
1072 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1073 {
1074     m_caretPosition = position;
1075     m_caretAtLineStart = showAtLineStart;
1076 }
1077
1078 /// Move caret one visual step forward: this may mean setting a flag
1079 /// and keeping the same position if we're going from the end of one line
1080 /// to the start of the next, which may be the exact same caret position.
1081 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1082 {
1083     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1084
1085     // Only do the check if we're not at the end of the paragraph (where things work OK
1086     // anyway)
1087     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1088     {
1089         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1090
1091         if (line)
1092         {
1093             wxRichTextRange lineRange = line->GetAbsoluteRange();
1094
1095             // We're at the end of a line. See whether we need to
1096             // stay at the same actual caret position but change visual
1097             // position, or not.
1098             if (oldPosition == lineRange.GetEnd())
1099             {
1100                 if (m_caretAtLineStart)
1101                 {
1102                     // We're already at the start of the line, so actually move on now.
1103                     m_caretPosition = oldPosition + 1;
1104                     m_caretAtLineStart = false;
1105                 }
1106                 else
1107                 {
1108                     // We're showing at the end of the line, so keep to
1109                     // the same position but indicate that we're to show
1110                     // at the start of the next line.
1111                     m_caretPosition = oldPosition;
1112                     m_caretAtLineStart = true;
1113                 }
1114                 SetDefaultStyleToCursorStyle();
1115                 return;
1116             }
1117         }
1118     }
1119     m_caretPosition ++;
1120     SetDefaultStyleToCursorStyle();
1121 }
1122
1123 /// Move caret one visual step backward: this may mean setting a flag
1124 /// and keeping the same position if we're going from the end of one line
1125 /// to the start of the next, which may be the exact same caret position.
1126 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1127 {
1128     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1129
1130     // Only do the check if we're not at the start of the paragraph (where things work OK
1131     // anyway)
1132     if (para && (oldPosition != para->GetRange().GetStart()))
1133     {
1134         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1135
1136         if (line)
1137         {
1138             wxRichTextRange lineRange = line->GetAbsoluteRange();
1139
1140             // We're at the start of a line. See whether we need to
1141             // stay at the same actual caret position but change visual
1142             // position, or not.
1143             if (oldPosition == lineRange.GetStart())
1144             {
1145                 m_caretPosition = oldPosition-1;
1146                 m_caretAtLineStart = true;
1147                 return;
1148             }
1149             else if (oldPosition == lineRange.GetEnd())
1150             {
1151                 if (m_caretAtLineStart)
1152                 {
1153                     // We're at the start of the line, so keep the same caret position
1154                     // but clear the start-of-line flag.
1155                     m_caretPosition = oldPosition;
1156                     m_caretAtLineStart = false;
1157                 }
1158                 else
1159                 {
1160                     // We're showing at the end of the line, so go back
1161                     // to the previous character position.
1162                     m_caretPosition = oldPosition - 1;
1163                 }
1164                 SetDefaultStyleToCursorStyle();
1165                 return;
1166             }
1167         }
1168     }
1169     m_caretPosition --;
1170     SetDefaultStyleToCursorStyle();
1171 }
1172
1173 /// Move right
1174 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1175 {
1176     long endPos = GetBuffer().GetRange().GetEnd();
1177
1178     if (m_caretPosition + noPositions < endPos)
1179     {
1180         long oldPos = m_caretPosition;
1181         long newPos = m_caretPosition + noPositions;
1182
1183         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1184         if (!extendSel)
1185             SelectNone();
1186
1187         // Determine by looking at oldPos and m_caretPosition whether
1188         // we moved from the end of a line to the start of the next line, in which case
1189         // we want to adjust the caret position such that it is positioned at the
1190         // start of the next line, rather than jumping past the first character of the
1191         // line.
1192         if (noPositions == 1 && !extendSel)
1193             MoveCaretForward(oldPos);
1194         else
1195             SetCaretPosition(newPos);
1196
1197         PositionCaret();
1198         SetDefaultStyleToCursorStyle();
1199
1200         if (extendSel)
1201             Refresh(false);
1202         return true;
1203     }
1204     else
1205         return false;
1206 }
1207
1208 /// Move left
1209 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1210 {
1211     long startPos = -1;
1212
1213     if (m_caretPosition > startPos - noPositions + 1)
1214     {
1215         long oldPos = m_caretPosition;
1216         long newPos = m_caretPosition - noPositions;
1217         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1218         if (!extendSel)
1219             SelectNone();
1220
1221         if (noPositions == 1 && !extendSel)
1222             MoveCaretBack(oldPos);
1223         else
1224             SetCaretPosition(newPos);
1225
1226         PositionCaret();
1227         SetDefaultStyleToCursorStyle();
1228
1229         if (extendSel)
1230             Refresh(false);
1231         return true;
1232     }
1233     else
1234         return false;
1235 }
1236
1237 /// Move up
1238 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1239 {
1240     return MoveDown(- noLines, flags);
1241 }
1242
1243 /// Move up
1244 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1245 {
1246     if (!GetCaret())
1247         return false;
1248
1249     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1250     wxPoint pt = GetCaret()->GetPosition();
1251     long newLine = lineNumber + noLines;
1252
1253     if (lineNumber != -1)
1254     {
1255         if (noLines > 0)
1256         {
1257             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1258
1259             if (newLine > lastLine)
1260                 return false;
1261         }
1262         else
1263         {
1264             if (newLine < 0)
1265                 return false;
1266         }
1267     }
1268
1269     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1270     if (lineObj)
1271     {
1272         pt.y = lineObj->GetAbsolutePosition().y + 2;
1273     }
1274     else
1275         return false;
1276
1277     long newPos = 0;
1278     wxClientDC dc(this);
1279     PrepareDC(dc);
1280     dc.SetFont(GetFont());
1281
1282     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1283
1284     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1285     {
1286         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1287         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1288         // so we view the caret at the start of the line.
1289         bool caretLineStart = false;
1290         if (hitTest == wxRICHTEXT_HITTEST_BEFORE)
1291         {
1292             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1293             wxRichTextRange lineRange;
1294             if (thisLine)
1295                 lineRange = thisLine->GetAbsoluteRange();
1296
1297             if (thisLine && (newPos-1) == lineRange.GetEnd())
1298             {
1299                 newPos --;
1300                 caretLineStart = true;
1301             }
1302             else
1303             {
1304                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1305                 if (para && para->GetRange().GetStart() == newPos)
1306                     newPos --;
1307             }
1308         }
1309
1310         long newSelEnd = newPos;
1311
1312         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1313         if (!extendSel)
1314             SelectNone();
1315
1316         SetCaretPosition(newPos, caretLineStart);
1317         PositionCaret();
1318         SetDefaultStyleToCursorStyle();
1319
1320         if (extendSel)
1321             Refresh(false);
1322         return true;
1323     }
1324
1325     return false;
1326 }
1327
1328 /// Move to the end of the paragraph
1329 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1330 {
1331     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1332     if (para)
1333     {
1334         long newPos = para->GetRange().GetEnd() - 1;
1335         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1336         if (!extendSel)
1337             SelectNone();
1338
1339         SetCaretPosition(newPos);
1340         PositionCaret();
1341         SetDefaultStyleToCursorStyle();
1342
1343         if (extendSel)
1344             Refresh(false);
1345         return true;
1346     }
1347
1348     return false;
1349 }
1350
1351 /// Move to the start of the paragraph
1352 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1353 {
1354     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1355     if (para)
1356     {
1357         long newPos = para->GetRange().GetStart() - 1;
1358         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1359         if (!extendSel)
1360             SelectNone();
1361
1362         SetCaretPosition(newPos);
1363         PositionCaret();
1364         SetDefaultStyleToCursorStyle();
1365
1366         if (extendSel)
1367             Refresh(false);
1368         return true;
1369     }
1370
1371     return false;
1372 }
1373
1374 /// Move to the end of the line
1375 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1376 {
1377     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1378
1379     if (line)
1380     {
1381         wxRichTextRange lineRange = line->GetAbsoluteRange();
1382         long newPos = lineRange.GetEnd();
1383         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1384         if (!extendSel)
1385             SelectNone();
1386
1387         SetCaretPosition(newPos);
1388         PositionCaret();
1389         SetDefaultStyleToCursorStyle();
1390
1391         if (extendSel)
1392             Refresh(false);
1393         return true;
1394     }
1395
1396     return false;
1397 }
1398
1399 /// Move to the start of the line
1400 bool wxRichTextCtrl::MoveToLineStart(int flags)
1401 {
1402     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1403     if (line)
1404     {
1405         wxRichTextRange lineRange = line->GetAbsoluteRange();
1406         long newPos = lineRange.GetStart()-1;
1407
1408         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1409         if (!extendSel)
1410             SelectNone();
1411
1412         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1413
1414         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1415         PositionCaret();
1416         SetDefaultStyleToCursorStyle();
1417
1418         if (extendSel)
1419             Refresh(false);
1420         return true;
1421     }
1422
1423     return false;
1424 }
1425
1426 /// Move to the start of the buffer
1427 bool wxRichTextCtrl::MoveHome(int flags)
1428 {
1429     if (m_caretPosition != -1)
1430     {
1431         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1432         if (!extendSel)
1433             SelectNone();
1434
1435         SetCaretPosition(-1);
1436         PositionCaret();
1437         SetDefaultStyleToCursorStyle();
1438
1439         if (extendSel)
1440             Refresh(false);
1441         return true;
1442     }
1443     else
1444         return false;
1445 }
1446
1447 /// Move to the end of the buffer
1448 bool wxRichTextCtrl::MoveEnd(int flags)
1449 {
1450     long endPos = GetBuffer().GetRange().GetEnd()-1;
1451
1452     if (m_caretPosition != endPos)
1453     {
1454         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1455         if (!extendSel)
1456             SelectNone();
1457
1458         SetCaretPosition(endPos);
1459         PositionCaret();
1460         SetDefaultStyleToCursorStyle();
1461
1462         if (extendSel)
1463             Refresh(false);
1464         return true;
1465     }
1466     else
1467         return false;
1468 }
1469
1470 /// Move noPages pages up
1471 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1472 {
1473     return PageDown(- noPages, flags);
1474 }
1475
1476 /// Move noPages pages down
1477 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1478 {
1479     // Calculate which line occurs noPages * screen height further down.
1480     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1481     if (line)
1482     {
1483         wxSize clientSize = GetClientSize();
1484         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1485
1486         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1487         if (newLine)
1488         {
1489             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1490             long pos = lineRange.GetStart()-1;
1491             if (pos != m_caretPosition)
1492             {
1493                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1494
1495                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1496                 if (!extendSel)
1497                     SelectNone();
1498
1499                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1500                 PositionCaret();
1501                 SetDefaultStyleToCursorStyle();
1502
1503                 if (extendSel)
1504                     Refresh(false);
1505                 return true;
1506             }
1507         }
1508     }
1509
1510     return false;
1511 }
1512
1513 // Finds the caret position for the next word
1514 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1515 {
1516     long endPos = GetBuffer().GetRange().GetEnd();
1517
1518     if (direction > 0)
1519     {
1520         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1521
1522         // First skip current text to space
1523         while (i < endPos && i > -1)
1524         {
1525             // i is in character, not caret positions
1526             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1527             if (text != wxT(" ") && !text.empty())
1528                 i += direction;
1529             else
1530             {
1531                 break;
1532             }
1533         }
1534         while (i < endPos && i > -1)
1535         {
1536             // i is in character, not caret positions
1537             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1538             if (text.empty()) // End of paragraph, or maybe an image
1539                 return wxMax(-1, i - 1);
1540             else if (text == wxT(" ") || text.empty())
1541                 i += direction;
1542             else
1543             {
1544                 // Convert to caret position
1545                 return wxMax(-1, i - 1);
1546             }
1547         }
1548         if (i >= endPos)
1549             return endPos-1;
1550         return i-1;
1551     }
1552     else
1553     {
1554         long i = m_caretPosition;
1555
1556         // First skip white space
1557         while (i < endPos && i > -1)
1558         {
1559             // i is in character, not caret positions
1560             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1561             if (text.empty()) // End of paragraph, or maybe an image
1562                 break;
1563             else if (text == wxT(" ") || text.empty())
1564                 i += direction;
1565             else
1566                 break;
1567         }
1568         // Next skip current text to space
1569         while (i < endPos && i > -1)
1570         {
1571             // i is in character, not caret positions
1572             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1573             if (text != wxT(" ") /* && !text.empty() */)
1574                 i += direction;
1575             else
1576             {
1577                 return i;
1578             }
1579         }
1580         if (i < -1)
1581             return -1;
1582         return i;
1583     }
1584 }
1585
1586 /// Move n words left
1587 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1588 {
1589     long pos = FindNextWordPosition(-1);
1590     if (pos != m_caretPosition)
1591     {
1592         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1593
1594         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1595         if (!extendSel)
1596             SelectNone();
1597
1598         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1599         PositionCaret();
1600         SetDefaultStyleToCursorStyle();
1601
1602         if (extendSel)
1603             Refresh(false);
1604         return true;
1605     }
1606
1607     return false;
1608 }
1609
1610 /// Move n words right
1611 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1612 {
1613     long pos = FindNextWordPosition(1);
1614     if (pos != m_caretPosition)
1615     {
1616         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1617
1618         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1619         if (!extendSel)
1620             SelectNone();
1621
1622         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1623         PositionCaret();
1624         SetDefaultStyleToCursorStyle();
1625
1626         if (extendSel)
1627             Refresh(false);
1628         return true;
1629     }
1630
1631     return false;
1632 }
1633
1634 /// Sizing
1635 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1636 {
1637     // Only do sizing optimization for large buffers
1638     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1639     {
1640         m_fullLayoutRequired = true;
1641         m_fullLayoutTime = wxGetLocalTimeMillis();
1642         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1643         LayoutContent(true /* onlyVisibleRect */);
1644     }
1645     else
1646         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1647
1648 #if wxRICHTEXT_BUFFERED_PAINTING
1649     RecreateBuffer();
1650 #endif
1651
1652     event.Skip();
1653 }
1654
1655
1656 /// Idle-time processing
1657 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1658 {
1659     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1660
1661     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1662     {
1663         m_fullLayoutRequired = false;
1664         m_fullLayoutTime = 0;
1665         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1666         ShowPosition(m_fullLayoutSavedPosition);
1667         Refresh(false);
1668     }
1669
1670     if (m_caretPositionForDefaultStyle != -2)
1671     {
1672         // If the caret position has changed, no longer reflect the default style
1673         // in the UI.
1674         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1675             m_caretPositionForDefaultStyle = -2;
1676     }
1677
1678     event.Skip();
1679 }
1680
1681 /// Scrolling
1682 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1683 {
1684     // Not used
1685     event.Skip();
1686 }
1687
1688 /// Set up scrollbars, e.g. after a resize
1689 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1690 {
1691     if (m_freezeCount)
1692         return;
1693
1694     if (GetBuffer().IsEmpty())
1695     {
1696         SetScrollbars(0, 0, 0, 0, 0, 0);
1697         return;
1698     }
1699
1700     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1701     // of pixels. See e.g. wxVScrolledWindow for ideas.
1702     int pixelsPerUnit = 5;
1703     wxSize clientSize = GetClientSize();
1704
1705     int maxHeight = GetBuffer().GetCachedSize().y;
1706
1707     // Round up so we have at least maxHeight pixels
1708     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1709
1710     int startX = 0, startY = 0;
1711     if (!atTop)
1712         GetViewStart(& startX, & startY);
1713
1714     int maxPositionX = 0; // wxMax(sz.x - clientSize.x, 0);
1715     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
1716
1717     // Move to previous scroll position if
1718     // possible
1719     SetScrollbars(0, pixelsPerUnit,
1720         0, unitsY,
1721         wxMin(maxPositionX, startX), wxMin(maxPositionY, startY));
1722 }
1723
1724 /// Paint the background
1725 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1726 {
1727     wxColour backgroundColour = GetBackgroundColour();
1728     if (!backgroundColour.Ok())
1729         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1730
1731     // Clear the background
1732     dc.SetBrush(wxBrush(backgroundColour));
1733     dc.SetPen(*wxTRANSPARENT_PEN);
1734     wxRect windowRect(GetClientSize());
1735     windowRect.x -= 2; windowRect.y -= 2;
1736     windowRect.width += 4; windowRect.height += 4;
1737
1738     // We need to shift the rectangle to take into account
1739     // scrolling. Converting device to logical coordinates.
1740     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1741     dc.DrawRectangle(windowRect);
1742 }
1743
1744 #if wxRICHTEXT_BUFFERED_PAINTING
1745 /// Recreate buffer bitmap if necessary
1746 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1747 {
1748     wxSize sz = size;
1749     if (sz == wxDefaultSize)
1750         sz = GetClientSize();
1751
1752     if (sz.x < 1 || sz.y < 1)
1753         return false;
1754
1755     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1756         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1757     return m_bufferBitmap.Ok();
1758 }
1759 #endif
1760
1761 // ----------------------------------------------------------------------------
1762 // file IO functions
1763 // ----------------------------------------------------------------------------
1764
1765 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
1766 {
1767     bool success = GetBuffer().LoadFile(filename, fileType);
1768     if (success)
1769         m_filename = filename;
1770
1771     DiscardEdits();
1772     SetInsertionPoint(0);
1773     LayoutContent();
1774     PositionCaret();
1775     SetupScrollbars(true);
1776     Refresh(false);
1777     SendTextUpdatedEvent();
1778
1779     if (success)
1780         return true;
1781     else
1782     {
1783         wxLogError(_("File couldn't be loaded."));
1784
1785         return false;
1786     }
1787 }
1788
1789 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
1790 {
1791     if (GetBuffer().SaveFile(filename, fileType))
1792     {
1793         m_filename = filename;
1794
1795         DiscardEdits();
1796
1797         return true;
1798     }
1799
1800     wxLogError(_("The text couldn't be saved."));
1801
1802     return false;
1803 }
1804
1805 // ----------------------------------------------------------------------------
1806 // wxRichTextCtrl specific functionality
1807 // ----------------------------------------------------------------------------
1808
1809 /// Add a new paragraph of text to the end of the buffer
1810 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
1811 {
1812     return GetBuffer().AddParagraph(text);
1813 }
1814
1815 /// Add an image
1816 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
1817 {
1818     return GetBuffer().AddImage(image);
1819 }
1820
1821 // ----------------------------------------------------------------------------
1822 // selection and ranges
1823 // ----------------------------------------------------------------------------
1824
1825 void wxRichTextCtrl::SelectAll()
1826 {
1827     SetSelection(0, GetLastPosition()+1);
1828     m_selectionAnchor = -1;
1829 }
1830
1831 /// Select none
1832 void wxRichTextCtrl::SelectNone()
1833 {
1834     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
1835         SetSelection(-2, -2);
1836     m_selectionAnchor = -2;
1837 }
1838
1839 static bool wxIsWordDelimiter(const wxString& text)
1840 {
1841     return !text.IsEmpty() && !wxIsalnum(text[0]);
1842 }
1843
1844 /// Select the word at the given character position
1845 bool wxRichTextCtrl::SelectWord(long position)
1846 {
1847     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
1848         return false;
1849
1850     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
1851     if (!para)
1852         return false;
1853
1854     long positionStart = position;
1855     long positionEnd = position;
1856
1857     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
1858     {
1859         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
1860         if (wxIsWordDelimiter(text))
1861         {
1862             positionStart ++;
1863             break;
1864         }
1865     }
1866     if (positionStart < para->GetRange().GetStart())
1867         positionStart = para->GetRange().GetStart();
1868
1869     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
1870     {
1871         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
1872         if (wxIsWordDelimiter(text))
1873         {
1874             positionEnd --;
1875             break;
1876         }
1877     }
1878     if (positionEnd >= para->GetRange().GetEnd())
1879         positionEnd = para->GetRange().GetEnd();
1880
1881     SetSelection(positionStart, positionEnd+1);
1882
1883     if (positionStart >= 0)
1884     {
1885         MoveCaret(positionStart-1, true);
1886         SetDefaultStyleToCursorStyle();
1887     }
1888
1889     return true;
1890 }
1891
1892 wxString wxRichTextCtrl::GetStringSelection() const
1893 {
1894     long from, to;
1895     GetSelection(&from, &to);
1896
1897     return GetRange(from, to);
1898 }
1899
1900 // ----------------------------------------------------------------------------
1901 // hit testing
1902 // ----------------------------------------------------------------------------
1903
1904 wxTextCtrlHitTestResult
1905 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
1906 {
1907     // implement in terms of the other overload as the native ports typically
1908     // can get the position and not (x, y) pair directly (although wxUniv
1909     // directly gets x and y -- and so overrides this method as well)
1910     long pos;
1911     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
1912
1913     if ( rc != wxTE_HT_UNKNOWN )
1914     {
1915         PositionToXY(pos, x, y);
1916     }
1917
1918     return rc;
1919 }
1920
1921 wxTextCtrlHitTestResult
1922 wxRichTextCtrl::HitTest(const wxPoint& pt,
1923                         long * pos) const
1924 {
1925     wxClientDC dc((wxRichTextCtrl*) this);
1926     ((wxRichTextCtrl*)this)->PrepareDC(dc);
1927
1928     // Buffer uses logical position (relative to start of buffer)
1929     // so convert
1930     wxPoint pt2 = GetLogicalPoint(pt);
1931
1932     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
1933
1934     switch ( hit )
1935     {
1936         case wxRICHTEXT_HITTEST_BEFORE:
1937             return wxTE_HT_BEFORE;
1938
1939         case wxRICHTEXT_HITTEST_AFTER:
1940             return wxTE_HT_BEYOND;
1941
1942         case wxRICHTEXT_HITTEST_ON:
1943             return wxTE_HT_ON_TEXT;
1944     }
1945
1946     return wxTE_HT_UNKNOWN;
1947 }
1948
1949 // ----------------------------------------------------------------------------
1950 // set/get the controls text
1951 // ----------------------------------------------------------------------------
1952
1953 wxString wxRichTextCtrl::GetValue() const
1954 {
1955     return GetBuffer().GetText();
1956 }
1957
1958 wxString wxRichTextCtrl::GetRange(long from, long to) const
1959 {
1960     // Public API for range is different from internals
1961     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
1962 }
1963
1964 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
1965 {
1966     Clear();
1967
1968     // if the text is long enough, it's faster to just set it instead of first
1969     // comparing it with the old one (chances are that it will be different
1970     // anyhow, this comparison is there to avoid flicker for small single-line
1971     // edit controls mostly)
1972     if ( (value.length() > 0x400) || (value != GetValue()) )
1973     {
1974         DoWriteText(value);
1975
1976         // for compatibility, don't move the cursor when doing SetValue()
1977         SetInsertionPoint(0);
1978     }
1979     else // same text
1980     {
1981         if ( flags & SetValue_SendEvent )
1982         {
1983             // still send an event for consistency
1984             SendTextUpdatedEvent();
1985         }
1986     }
1987
1988     // we should reset the modified flag even if the value didn't really change
1989
1990     // mark the control as being not dirty - we changed its text, not the
1991     // user
1992     DiscardEdits();
1993 }
1994
1995 void wxRichTextCtrl::WriteText(const wxString& value)
1996 {
1997     DoWriteText(value);
1998 }
1999
2000 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2001 {
2002     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2003
2004     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this);
2005
2006     if ( flags & SetValue_SendEvent )
2007         SendTextUpdatedEvent();
2008 }
2009
2010 void wxRichTextCtrl::AppendText(const wxString& text)
2011 {
2012     SetInsertionPointEnd();
2013
2014     WriteText(text);
2015 }
2016
2017 /// Write an image at the current insertion point
2018 bool wxRichTextCtrl::WriteImage(const wxImage& image, int bitmapType)
2019 {
2020     wxRichTextImageBlock imageBlock;
2021
2022     wxImage image2 = image;
2023     if (imageBlock.MakeImageBlock(image2, bitmapType))
2024         return WriteImage(imageBlock);
2025
2026     return false;
2027 }
2028
2029 bool wxRichTextCtrl::WriteImage(const wxString& filename, int bitmapType)
2030 {
2031     wxRichTextImageBlock imageBlock;
2032
2033     wxImage image;
2034     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2035         return WriteImage(imageBlock);
2036
2037     return false;
2038 }
2039
2040 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2041 {
2042     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2043 }
2044
2045 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, int bitmapType)
2046 {
2047     if (bitmap.Ok())
2048     {
2049         wxRichTextImageBlock imageBlock;
2050
2051         wxImage image = bitmap.ConvertToImage();
2052         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2053             return WriteImage(imageBlock);
2054     }
2055
2056     return false;
2057 }
2058
2059 /// Insert a newline (actually paragraph) at the current insertion point.
2060 bool wxRichTextCtrl::Newline()
2061 {
2062     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
2063 }
2064
2065
2066 // ----------------------------------------------------------------------------
2067 // Clipboard operations
2068 // ----------------------------------------------------------------------------
2069
2070 void wxRichTextCtrl::Copy()
2071 {
2072     if (CanCopy())
2073     {
2074         wxRichTextRange range = GetInternalSelectionRange();
2075         GetBuffer().CopyToClipboard(range);
2076     }
2077 }
2078
2079 void wxRichTextCtrl::Cut()
2080 {
2081     if (CanCut())
2082     {
2083         wxRichTextRange range = GetInternalSelectionRange();
2084         GetBuffer().CopyToClipboard(range);
2085
2086         DeleteSelectedContent();
2087         LayoutContent();
2088         Refresh(false);
2089     }
2090 }
2091
2092 void wxRichTextCtrl::Paste()
2093 {
2094     if (CanPaste())
2095     {
2096         BeginBatchUndo(_("Paste"));
2097
2098         long newPos = m_caretPosition;
2099         DeleteSelectedContent(& newPos);
2100
2101         GetBuffer().PasteFromClipboard(newPos);
2102
2103         EndBatchUndo();
2104     }
2105 }
2106
2107 void wxRichTextCtrl::DeleteSelection()
2108 {
2109     if (CanDeleteSelection())
2110     {
2111         DeleteSelectedContent();
2112     }
2113 }
2114
2115 bool wxRichTextCtrl::HasSelection() const
2116 {
2117     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2118 }
2119
2120 bool wxRichTextCtrl::CanCopy() const
2121 {
2122     // Can copy if there's a selection
2123     return HasSelection();
2124 }
2125
2126 bool wxRichTextCtrl::CanCut() const
2127 {
2128     return HasSelection() && IsEditable();
2129 }
2130
2131 bool wxRichTextCtrl::CanPaste() const
2132 {
2133     if ( !IsEditable() )
2134         return false;
2135
2136     return GetBuffer().CanPasteFromClipboard();
2137 }
2138
2139 bool wxRichTextCtrl::CanDeleteSelection() const
2140 {
2141     return HasSelection() && IsEditable();
2142 }
2143
2144
2145 // ----------------------------------------------------------------------------
2146 // Accessors
2147 // ----------------------------------------------------------------------------
2148
2149 void wxRichTextCtrl::SetEditable(bool editable)
2150 {
2151     m_editable = editable;
2152 }
2153
2154 void wxRichTextCtrl::SetInsertionPoint(long pos)
2155 {
2156     SelectNone();
2157
2158     m_caretPosition = pos - 1;
2159 }
2160
2161 void wxRichTextCtrl::SetInsertionPointEnd()
2162 {
2163     long pos = GetLastPosition();
2164     SetInsertionPoint(pos);
2165 }
2166
2167 long wxRichTextCtrl::GetInsertionPoint() const
2168 {
2169     return m_caretPosition+1;
2170 }
2171
2172 wxTextPos wxRichTextCtrl::GetLastPosition() const
2173 {
2174     return GetBuffer().GetRange().GetEnd();
2175 }
2176
2177 // If the return values from and to are the same, there is no
2178 // selection.
2179 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2180 {
2181     *from = m_selectionRange.GetStart();
2182     *to = m_selectionRange.GetEnd();
2183     if ((*to) != -1 && (*to) != -2)
2184         (*to) ++;
2185 }
2186
2187 bool wxRichTextCtrl::IsEditable() const
2188 {
2189     return m_editable;
2190 }
2191
2192 // ----------------------------------------------------------------------------
2193 // selection
2194 // ----------------------------------------------------------------------------
2195
2196 void wxRichTextCtrl::SetSelection(long from, long to)
2197 {
2198     // if from and to are both -1, it means (in wxWidgets) that all text should
2199     // be selected.
2200     if ( (from == -1) && (to == -1) )
2201     {
2202         from = 0;
2203         to = GetLastPosition()+1;
2204     }
2205
2206     DoSetSelection(from, to);
2207 }
2208
2209 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2210 {
2211     m_selectionAnchor = from;
2212     m_selectionRange.SetRange(from, to-1);
2213
2214     Refresh(false);
2215     PositionCaret();
2216 }
2217
2218 // ----------------------------------------------------------------------------
2219 // Editing
2220 // ----------------------------------------------------------------------------
2221
2222 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2223                              const wxString& value)
2224 {
2225     BeginBatchUndo(_("Replace"));
2226
2227     DeleteSelectedContent();
2228
2229     DoWriteText(value, SetValue_SelectionOnly);
2230
2231     EndBatchUndo();
2232 }
2233
2234 void wxRichTextCtrl::Remove(long from, long to)
2235 {
2236     SelectNone();
2237
2238     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to),
2239         m_caretPosition,       // Current caret position
2240         from,                           // New caret position
2241         this);
2242
2243     LayoutContent();
2244     if (!IsFrozen())
2245         Refresh(false);
2246 }
2247
2248 bool wxRichTextCtrl::IsModified() const
2249 {
2250     return m_buffer.IsModified();
2251 }
2252
2253 void wxRichTextCtrl::MarkDirty()
2254 {
2255     m_buffer.Modify(true);
2256 }
2257
2258 void wxRichTextCtrl::DiscardEdits()
2259 {
2260     m_caretPositionForDefaultStyle = -2;
2261     m_buffer.Modify(false);
2262     m_buffer.GetCommandProcessor()->ClearCommands();
2263 }
2264
2265 int wxRichTextCtrl::GetNumberOfLines() const
2266 {
2267     return GetBuffer().GetParagraphCount();
2268 }
2269
2270 // ----------------------------------------------------------------------------
2271 // Positions <-> coords
2272 // ----------------------------------------------------------------------------
2273
2274 long wxRichTextCtrl::XYToPosition(long x, long y) const
2275 {
2276     return GetBuffer().XYToPosition(x, y);
2277 }
2278
2279 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2280 {
2281     return GetBuffer().PositionToXY(pos, x, y);
2282 }
2283
2284 // ----------------------------------------------------------------------------
2285 //
2286 // ----------------------------------------------------------------------------
2287
2288 void wxRichTextCtrl::ShowPosition(long pos)
2289 {
2290     if (!IsPositionVisible(pos))
2291         ScrollIntoView(pos-1, WXK_DOWN);
2292 }
2293
2294 int wxRichTextCtrl::GetLineLength(long lineNo) const
2295 {
2296     return GetBuffer().GetParagraphLength(lineNo);
2297 }
2298
2299 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2300 {
2301     return GetBuffer().GetParagraphText(lineNo);
2302 }
2303
2304 // ----------------------------------------------------------------------------
2305 // Undo/redo
2306 // ----------------------------------------------------------------------------
2307
2308 void wxRichTextCtrl::Undo()
2309 {
2310     if (CanUndo())
2311     {
2312         GetCommandProcessor()->Undo();
2313     }
2314 }
2315
2316 void wxRichTextCtrl::Redo()
2317 {
2318     if (CanRedo())
2319     {
2320         GetCommandProcessor()->Redo();
2321     }
2322 }
2323
2324 bool wxRichTextCtrl::CanUndo() const
2325 {
2326     return GetCommandProcessor()->CanUndo();
2327 }
2328
2329 bool wxRichTextCtrl::CanRedo() const
2330 {
2331     return GetCommandProcessor()->CanRedo();
2332 }
2333
2334 // ----------------------------------------------------------------------------
2335 // implementation details
2336 // ----------------------------------------------------------------------------
2337
2338 void wxRichTextCtrl::Command(wxCommandEvent& event)
2339 {
2340     SetValue(event.GetString());
2341     GetEventHandler()->ProcessEvent(event);
2342 }
2343
2344 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2345 {
2346     // By default, load the first file into the text window.
2347     if (event.GetNumberOfFiles() > 0)
2348     {
2349         LoadFile(event.GetFiles()[0]);
2350     }
2351 }
2352
2353 wxSize wxRichTextCtrl::DoGetBestSize() const
2354 {
2355     return wxSize(10, 10);
2356 }
2357
2358 // ----------------------------------------------------------------------------
2359 // standard handlers for standard edit menu events
2360 // ----------------------------------------------------------------------------
2361
2362 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2363 {
2364     Cut();
2365 }
2366
2367 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2368 {
2369     DeleteSelection();
2370 }
2371
2372 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2373 {
2374     Copy();
2375 }
2376
2377 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2378 {
2379     Paste();
2380 }
2381
2382 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2383 {
2384     Undo();
2385 }
2386
2387 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2388 {
2389     Redo();
2390 }
2391
2392 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2393 {
2394     event.Enable( CanCut() );
2395 }
2396
2397 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2398 {
2399     event.Enable( CanCopy() );
2400 }
2401
2402 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2403 {
2404     event.Enable( CanDeleteSelection() );
2405 }
2406
2407 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2408 {
2409     event.Enable( CanPaste() );
2410 }
2411
2412 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2413 {
2414     event.Enable( CanUndo() );
2415     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2416 }
2417
2418 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2419 {
2420     event.Enable( CanRedo() );
2421     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2422 }
2423
2424 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2425 {
2426     SelectAll();
2427 }
2428
2429 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2430 {
2431     event.Enable(GetLastPosition() > 0);
2432 }
2433
2434 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& WXUNUSED(event))
2435 {
2436     if (!m_contextMenu)
2437     {
2438         m_contextMenu = new wxMenu;
2439         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2440         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2441         m_contextMenu->AppendSeparator();
2442         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2443         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2444         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2445         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2446         m_contextMenu->AppendSeparator();
2447         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2448     }
2449     PopupMenu(m_contextMenu);
2450     return;
2451 }
2452
2453 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttrEx& style)
2454 {
2455     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style);
2456 }
2457
2458 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2459 {
2460     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttrEx(style));
2461 }
2462
2463 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxRichTextAttr& style)
2464 {
2465     return GetBuffer().SetStyle(range.ToInternal(), style);
2466 }
2467
2468 // extended style setting operation with flags including:
2469 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2470 // see richtextbuffer.h for more details.
2471 bool wxRichTextCtrl::SetStyleEx(long start, long end, const wxTextAttrEx& style, int flags)
2472 {
2473     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style, flags);
2474 }
2475
2476 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttrEx& style, int flags)
2477 {
2478     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2479 }
2480
2481 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxRichTextAttr& style, int flags)
2482 {
2483     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2484 }
2485
2486 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttrEx& style)
2487 {
2488     return GetBuffer().SetDefaultStyle(style);
2489 }
2490
2491 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2492 {
2493     return GetBuffer().SetDefaultStyle(wxTextAttrEx(style));
2494 }
2495
2496 const wxTextAttrEx& wxRichTextCtrl::GetDefaultStyleEx() const
2497 {
2498     return GetBuffer().GetDefaultStyle();
2499 }
2500
2501 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2502 {
2503     return GetBuffer().GetDefaultStyle();
2504 }
2505
2506 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2507 {
2508     wxTextAttrEx attr(style);
2509     if (GetBuffer().GetStyle(position, attr))
2510     {
2511         style = attr;
2512         return true;
2513     }
2514     else
2515         return false;
2516 }
2517
2518 bool wxRichTextCtrl::GetStyle(long position, wxTextAttrEx& style)
2519 {
2520     return GetBuffer().GetStyle(position, style);
2521 }
2522
2523 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style)
2524 {
2525     return GetBuffer().GetStyle(position, style);
2526 }
2527
2528 /// Get the content (uncombined) attributes for this position.
2529
2530 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2531 {
2532     wxTextAttrEx attr(style);
2533     if (GetBuffer().GetUncombinedStyle(position, attr))
2534     {
2535         style = attr;
2536         return true;
2537     }
2538     else
2539         return false;
2540 }
2541
2542 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttrEx& style)
2543 {
2544     return GetBuffer().GetUncombinedStyle(position, style);
2545 }
2546
2547 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style)
2548 {
2549     return GetBuffer().GetUncombinedStyle(position, style);
2550 }
2551
2552 /// Set font, and also the buffer attributes
2553 bool wxRichTextCtrl::SetFont(const wxFont& font)
2554 {
2555     wxControl::SetFont(font);
2556
2557     wxTextAttrEx attr = GetBuffer().GetAttributes();
2558     attr.SetFont(font);
2559     GetBuffer().SetBasicStyle(attr);
2560
2561     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2562     Refresh(false);
2563
2564     return true;
2565 }
2566
2567 /// Transform logical to physical
2568 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2569 {
2570     wxPoint pt;
2571     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2572
2573     return pt;
2574 }
2575
2576 /// Transform physical to logical
2577 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2578 {
2579     wxPoint pt;
2580     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2581
2582     return pt;
2583 }
2584
2585 /// Position the caret
2586 void wxRichTextCtrl::PositionCaret()
2587 {
2588     if (!GetCaret())
2589         return;
2590
2591     //wxLogDebug(wxT("PositionCaret"));
2592
2593     wxRect caretRect;
2594     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2595     {
2596         wxPoint originalPt = caretRect.GetPosition();
2597         wxPoint pt = GetPhysicalPoint(originalPt);
2598         if (GetCaret()->GetPosition() != pt)
2599         {
2600             GetCaret()->Move(pt);
2601             GetCaret()->SetSize(caretRect.GetSize());
2602         }
2603     }
2604 }
2605
2606 /// Get the caret height and position for the given character position
2607 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2608 {
2609     wxClientDC dc(this);
2610     dc.SetFont(GetFont());
2611
2612     PrepareDC(dc);
2613
2614     wxPoint pt;
2615     int height = 0;
2616
2617     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2618     {
2619         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2620         return true;
2621     }
2622
2623     return false;
2624 }
2625
2626 /// Gets the line for the visible caret position. If the caret is
2627 /// shown at the very end of the line, it means the next character is actually
2628 /// on the following line. So let's get the line we're expecting to find
2629 /// if this is the case.
2630 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2631 {
2632     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2633     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2634     if (line)
2635     {
2636         wxRichTextRange lineRange = line->GetAbsoluteRange();
2637         if (caretPosition == lineRange.GetStart()-1 &&
2638             (para->GetRange().GetStart() != lineRange.GetStart()))
2639         {
2640             if (!m_caretAtLineStart)
2641                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2642         }
2643     }
2644     return line;
2645 }
2646
2647
2648 /// Move the caret to the given character position
2649 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2650 {
2651     if (GetBuffer().GetDirty())
2652         LayoutContent();
2653
2654     if (pos <= GetBuffer().GetRange().GetEnd())
2655     {
2656         SetCaretPosition(pos, showAtLineStart);
2657
2658         PositionCaret();
2659
2660         return true;
2661     }
2662     else
2663         return false;
2664 }
2665
2666 /// Layout the buffer: which we must do before certain operations, such as
2667 /// setting the caret position.
2668 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2669 {
2670     if (GetBuffer().GetDirty() || onlyVisibleRect)
2671     {
2672         wxRect availableSpace(GetClientSize());
2673         if (availableSpace.width == 0)
2674             availableSpace.width = 10;
2675         if (availableSpace.height == 0)
2676             availableSpace.height = 10;
2677
2678         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2679         if (onlyVisibleRect)
2680         {
2681             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2682             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2683         }
2684
2685         wxClientDC dc(this);
2686         dc.SetFont(GetFont());
2687
2688         PrepareDC(dc);
2689
2690         GetBuffer().Defragment();
2691         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2692         GetBuffer().Layout(dc, availableSpace, flags);
2693         GetBuffer().SetDirty(false);
2694
2695         if (!IsFrozen())
2696             SetupScrollbars();
2697     }
2698
2699     return true;
2700 }
2701
2702 /// Is all of the selection bold?
2703 bool wxRichTextCtrl::IsSelectionBold()
2704 {
2705     if (HasSelection())
2706     {
2707         wxRichTextAttr attr;
2708         wxRichTextRange range = GetInternalSelectionRange();
2709         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2710         attr.SetFontWeight(wxBOLD);
2711
2712         return HasCharacterAttributes(range, attr);
2713     }
2714     else
2715     {
2716         // If no selection, then we need to combine current style with default style
2717         // to see what the effect would be if we started typing.
2718         wxRichTextAttr attr;
2719         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2720
2721         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2722         if (GetStyle(pos, attr))
2723         {
2724             if (IsDefaultStyleShowing())
2725                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2726             return attr.GetFontWeight() == wxBOLD;
2727         }
2728     }
2729     return false;
2730 }
2731
2732 /// Is all of the selection italics?
2733 bool wxRichTextCtrl::IsSelectionItalics()
2734 {
2735     if (HasSelection())
2736     {
2737         wxRichTextRange range = GetInternalSelectionRange();
2738         wxRichTextAttr attr;
2739         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2740         attr.SetFontStyle(wxITALIC);
2741
2742         return HasCharacterAttributes(range, attr);
2743     }
2744     else
2745     {
2746         // If no selection, then we need to combine current style with default style
2747         // to see what the effect would be if we started typing.
2748         wxRichTextAttr attr;
2749         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2750
2751         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2752         if (GetStyle(pos, attr))
2753         {
2754             if (IsDefaultStyleShowing())
2755                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2756             return attr.GetFontStyle() == wxITALIC;
2757         }
2758     }
2759     return false;
2760 }
2761
2762 /// Is all of the selection underlined?
2763 bool wxRichTextCtrl::IsSelectionUnderlined()
2764 {
2765     if (HasSelection())
2766     {
2767         wxRichTextRange range = GetInternalSelectionRange();
2768         wxRichTextAttr attr;
2769         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2770         attr.SetFontUnderlined(true);
2771
2772         return HasCharacterAttributes(range, attr);
2773     }
2774     else
2775     {
2776         // If no selection, then we need to combine current style with default style
2777         // to see what the effect would be if we started typing.
2778         wxRichTextAttr attr;
2779         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2780         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2781
2782         if (GetStyle(pos, attr))
2783         {
2784             if (IsDefaultStyleShowing())
2785                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2786             return attr.GetFontUnderlined();
2787         }
2788     }
2789     return false;
2790 }
2791
2792 /// Apply bold to the selection
2793 bool wxRichTextCtrl::ApplyBoldToSelection()
2794 {
2795     wxRichTextAttr attr;
2796     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2797     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
2798
2799     if (HasSelection())
2800         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2801     else
2802         SetAndShowDefaultStyle(attr);
2803     return true;
2804 }
2805
2806 /// Apply italic to the selection
2807 bool wxRichTextCtrl::ApplyItalicToSelection()
2808 {
2809     wxRichTextAttr attr;
2810     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2811     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
2812
2813     if (HasSelection())
2814         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2815     else
2816         SetAndShowDefaultStyle(attr);
2817     return true;
2818 }
2819
2820 /// Apply underline to the selection
2821 bool wxRichTextCtrl::ApplyUnderlineToSelection()
2822 {
2823     wxRichTextAttr attr;
2824     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2825     attr.SetFontUnderlined(!IsSelectionUnderlined());
2826
2827     if (HasSelection())
2828         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2829     else
2830         SetAndShowDefaultStyle(attr);
2831     return true;
2832 }
2833
2834 /// Is all of the selection aligned according to the specified flag?
2835 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
2836 {
2837     wxRichTextRange range;
2838     if (HasSelection())
2839         range = GetInternalSelectionRange();
2840     else
2841         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+1);
2842
2843     wxRichTextAttr attr;
2844     attr.SetAlignment(alignment);
2845
2846     return HasParagraphAttributes(range, attr);
2847 }
2848
2849 /// Apply alignment to the selection
2850 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
2851 {
2852     wxRichTextAttr attr;
2853     attr.SetAlignment(alignment);
2854     if (HasSelection())
2855         return SetStyle(GetSelectionRange(), attr);
2856     else
2857     {
2858         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
2859         if (para)
2860             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
2861     }
2862     return true;
2863 }
2864
2865 /// Apply a named style to the selection
2866 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
2867 {
2868     // Flags are defined within each definition, so only certain
2869     // attributes are applied.
2870     wxRichTextAttr attr(def->GetStyle());
2871
2872     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE;
2873
2874     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
2875     {
2876         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2877
2878         wxRichTextRange range;
2879
2880         if (HasSelection())
2881             range = GetSelectionRange();
2882         else
2883         {
2884             long pos = GetAdjustedCaretPosition(GetCaretPosition());
2885             range = wxRichTextRange(pos, pos+1);
2886         }
2887
2888         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
2889     }
2890
2891     // Make sure the attr has the style name
2892     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
2893     {
2894         attr.SetParagraphStyleName(def->GetName());
2895
2896         // If applying a paragraph style, we only want the paragraph nodes to adopt these
2897         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
2898         // to change its style independently.
2899         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2900     }
2901     else
2902         attr.SetCharacterStyleName(def->GetName());
2903
2904     if (HasSelection())
2905         return SetStyleEx(GetSelectionRange(), attr, flags);
2906     else
2907     {
2908         SetAndShowDefaultStyle(attr);
2909         return true;
2910     }
2911 }
2912
2913 /// Apply the style sheet to the buffer, for example if the styles have changed.
2914 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
2915 {
2916     if (!styleSheet)
2917         styleSheet = GetBuffer().GetStyleSheet();
2918     if (!styleSheet)
2919         return false;
2920
2921     if (GetBuffer().ApplyStyleSheet(styleSheet))
2922     {
2923         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2924         Refresh(false);
2925         return true;
2926     }
2927     else
2928         return false;
2929 }
2930
2931 /// Sets the default style to the style under the cursor
2932 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
2933 {
2934     wxTextAttrEx attr;
2935     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
2936
2937     // If at the start of a paragraph, use the next position.
2938     long pos = GetAdjustedCaretPosition(GetCaretPosition());
2939
2940 #if wxRICHTEXT_USE_DYNAMIC_STYLES
2941     if (GetUncombinedStyle(pos, attr))
2942 #else
2943     if (GetStyle(pos, attr))
2944 #endif
2945     {
2946         SetDefaultStyle(attr);
2947         return true;
2948     }
2949
2950     return false;
2951 }
2952
2953 /// Returns the first visible position in the current view
2954 long wxRichTextCtrl::GetFirstVisiblePosition() const
2955 {
2956     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
2957     if (line)
2958         return line->GetAbsoluteRange().GetStart();
2959     else
2960         return 0;
2961 }
2962
2963 /// Get the first visible point in the window
2964 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
2965 {
2966     int ppuX, ppuY;
2967     int startXUnits, startYUnits;
2968
2969     GetScrollPixelsPerUnit(& ppuX, & ppuY);
2970     GetViewStart(& startXUnits, & startYUnits);
2971
2972     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
2973 }
2974
2975 /// The adjusted caret position is the character position adjusted to take
2976 /// into account whether we're at the start of a paragraph, in which case
2977 /// style information should be taken from the next position, not current one.
2978 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
2979 {
2980     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
2981
2982     if (para && (caretPos+1 == para->GetRange().GetStart()))
2983         caretPos ++;
2984     return caretPos;
2985 }
2986
2987 /// Get/set the selection range in character positions. -1, -1 means no selection.
2988 /// The range is in API convention, i.e. a single character selection is denoted
2989 /// by (n, n+1)
2990 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
2991 {
2992     wxRichTextRange range = GetInternalSelectionRange();
2993     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
2994         range.SetEnd(range.GetEnd() + 1);
2995     return range;
2996 }
2997
2998 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
2999 {
3000     wxRichTextRange range1(range);
3001     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3002         range1.SetEnd(range1.GetEnd() - 1);
3003
3004     wxASSERT( range1.GetStart() > range1.GetEnd() );
3005
3006     SetInternalSelectionRange(range1);
3007 }
3008
3009 /// Set list style
3010 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3011 {
3012     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3013 }
3014
3015 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3016 {
3017     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3018 }
3019
3020 /// Clear list for given range
3021 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3022 {
3023     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3024 }
3025
3026 /// Number/renumber any list elements in the given range
3027 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3028 {
3029     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3030 }
3031
3032 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3033 {
3034     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3035 }
3036
3037 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3038 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3039 {
3040     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3041 }
3042
3043 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3044 {
3045     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3046 }
3047
3048 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3049 {
3050     if (sm_availableFontNames.GetCount() == 0)
3051     {
3052         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3053         sm_availableFontNames.Sort();
3054     }
3055     return sm_availableFontNames;
3056 }
3057
3058 void wxRichTextCtrl::ClearAvailableFontNames()
3059 {
3060     sm_availableFontNames.Clear();
3061 }
3062
3063 #endif
3064     // wxUSE_RICHTEXT