src/richtext/richtextctrl.cpp

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