src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richeditctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/textfile.h"
  30 #include "wx/ffile.h"
  31 #include "wx/filename.h"
  32 #include "wx/dcbuffer.h"
  33 #include "wx/arrimpl.cpp"
  34 #include "wx/fontenum.h"
  35
  36 // DLL options compatibility check:
  37 #include "wx/app.h"
  38 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  39
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_CLICK)
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RETURN)
  45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CHARACTER)
  46 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_DELETE)
  47
  48 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING)
  49 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED)
  50 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING)
  51 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED)
  52
  53 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED)
  54 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED)
  55 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED)
  56 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED)
  57
  58 IMPLEMENT_CLASS( wxRichTextCtrl, wxControl )
  59
  60 IMPLEMENT_CLASS( wxRichTextEvent, wxNotifyEvent )
  61
  62 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
  63     EVT_PAINT(wxRichTextCtrl::OnPaint)
  64     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
  65     EVT_IDLE(wxRichTextCtrl::OnIdle)
  66     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
  67     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
  68     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
  69     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
  70     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
  71     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
  72     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
  73     EVT_CHAR(wxRichTextCtrl::OnChar)
  74     EVT_SIZE(wxRichTextCtrl::OnSize)
  75     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
  76     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
  77     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
  78     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
  79     EVT_SYS_COLOUR_CHANGED(wxRichTextCtrl::OnSysColourChanged)
  80
  81     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
  82     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
  83
  84     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
  85     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
  86
  87     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
  88     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
  89
  90     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
  91     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
  92
  93     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
  94     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
  95
  96     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
  97     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
  98
  99     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
 100     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 101 END_EVENT_TABLE()
 102
 103 /*!
 104  * wxRichTextCtrl
 105  */
 106
 107 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 108
 109 wxRichTextCtrl::wxRichTextCtrl()
 110               : wxScrollHelper(this)
 111 {
 112     Init();
 113 }
 114
 115 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 116                                wxWindowID id,
 117                                const wxString& value,
 118                                const wxPoint& pos,
 119                                const wxSize& size,
 120                                long style,
 121                                const wxValidator& validator,
 122                                const wxString& name)
 123               : wxScrollHelper(this)
 124 {
 125     Init();
 126     Create(parent, id, value, pos, size, style, validator, name);
 127 }
 128
 129 /// Creation
 130 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 131                              const wxValidator& validator, const wxString& name)
 132 {
 133     if (!wxControl::Create(parent, id, pos, size,
 134                            style|wxFULL_REPAINT_ON_RESIZE,
 135                            validator, name))
 136         return false;
 137
 138     if (!GetFont().Ok())
 139     {
 140         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 141     }
 142
 143     GetBuffer().Reset();
 144     GetBuffer().SetRichTextCtrl(this);
 145
 146     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 147     GetCaret()->Show();
 148
 149     if (style & wxTE_READONLY)
 150         SetEditable(false);
 151
 152     // The base attributes must all have default values
 153     wxTextAttr attributes;
 154     attributes.SetFont(GetFont());
 155     attributes.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
 156     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 157     attributes.SetLineSpacing(10);
 158     attributes.SetParagraphSpacingAfter(10);
 159     attributes.SetParagraphSpacingBefore(0);
 160     attributes.SetTextEffects(0);
 161     attributes.SetTextEffectFlags(wxTEXT_ATTR_EFFECT_STRIKETHROUGH|wxTEXT_ATTR_EFFECT_CAPITALS);
 162
 163     SetBasicStyle(attributes);
 164
 165     // The default attributes will be merged with base attributes, so
 166     // can be empty to begin with
 167     wxTextAttr defaultAttributes;
 168     SetDefaultStyle(defaultAttributes);
 169
 170     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 171     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 172
 173     // Tell the sizers to use the given or best size
 174     SetInitialSize(size);
 175
 176 #if wxRICHTEXT_BUFFERED_PAINTING
 177     // Create a buffer
 178     RecreateBuffer(size);
 179 #endif
 180
 181     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 182     m_urlCursor = wxCursor(wxCURSOR_HAND);
 183
 184     SetCursor(m_textCursor);
 185
 186     if (!value.IsEmpty())
 187         SetValue(value);
 188
 189     GetBuffer().AddEventHandler(this);
 190
 191     return true;
 192 }
 193
 194 wxRichTextCtrl::~wxRichTextCtrl()
 195 {
 196     GetBuffer().RemoveEventHandler(this);
 197
 198     delete m_contextMenu;
 199 }
 200
 201 /// Member initialisation
 202 void wxRichTextCtrl::Init()
 203 {
 204     m_freezeCount = 0;
 205     m_contextMenu = NULL;
 206     m_caret = NULL;
 207     m_caretPosition = -1;
 208     m_selectionRange.SetRange(-2, -2);
 209     m_selectionAnchor = -2;
 210     m_editable = true;
 211     m_caretAtLineStart = false;
 212     m_dragging = false;
 213     m_fullLayoutRequired = false;
 214     m_fullLayoutTime = 0;
 215     m_fullLayoutSavedPosition = 0;
 216     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 217     m_caretPositionForDefaultStyle = -2;
 218 }
 219
 220 /// Call Freeze to prevent refresh
 221 void wxRichTextCtrl::Freeze()
 222 {
 223     m_freezeCount ++;
 224 }
 225
 226 /// Call Thaw to refresh
 227 void wxRichTextCtrl::Thaw()
 228 {
 229     m_freezeCount --;
 230
 231     if (m_freezeCount == 0)
 232     {
 233         if (GetBuffer().GetDirty())
 234             LayoutContent();
 235         else
 236             SetupScrollbars();
 237         Refresh(false);
 238     }
 239 }
 240
 241 /// Clear all text
 242 void wxRichTextCtrl::Clear()
 243 {
 244     m_buffer.ResetAndClearCommands();
 245     m_buffer.SetDirty(true);
 246     m_caretPosition = -1;
 247     m_caretPositionForDefaultStyle = -2;
 248     m_caretAtLineStart = false;
 249     m_selectionRange.SetRange(-2, -2);
 250
 251     if (m_freezeCount == 0)
 252     {
 253         LayoutContent();
 254         Refresh(false);
 255     }
 256
 257     wxTextCtrl::SendTextUpdatedEvent(this);
 258 }
 259
 260 /// Painting
 261 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 262 {
 263     if (GetCaret() && GetCaret()->IsVisible())
 264         GetCaret()->Hide();
 265
 266     {
 267 #if wxRICHTEXT_BUFFERED_PAINTING
 268         wxBufferedPaintDC dc(this, m_bufferBitmap);
 269 #else
 270         wxPaintDC dc(this);
 271 #endif
 272         PrepareDC(dc);
 273
 274         if (m_freezeCount > 0)
 275             return;
 276
 277         dc.SetFont(GetFont());
 278
 279         // Paint the background
 280         PaintBackground(dc);
 281
 282         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 283
 284         wxRect drawingArea(GetUpdateRegion().GetBox());
 285         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 286
 287         wxRect availableSpace(GetClientSize());
 288         if (GetBuffer().GetDirty())
 289         {
 290             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 291             GetBuffer().SetDirty(false);
 292             SetupScrollbars();
 293         }
 294
 295         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 296     }
 297
 298     if (GetCaret() && !GetCaret()->IsVisible())
 299         GetCaret()->Show();
 300
 301     PositionCaret();
 302 }
 303
 304 // Empty implementation, to prevent flicker
 305 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 306 {
 307 }
 308
 309 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 310 {
 311     if (GetCaret())
 312     {
 313         if (!GetCaret()->IsVisible())
 314             GetCaret()->Show();
 315         PositionCaret();
 316     }
 317
 318     // if (!IsFrozen())
 319     //    Refresh(false);
 320 }
 321
 322 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 323 {
 324     if (GetCaret() && GetCaret()->IsVisible())
 325         GetCaret()->Hide();
 326
 327     // if (!IsFrozen())
 328     //    Refresh(false);
 329 }
 330
 331 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 332 {
 333     m_dragging = false;
 334 }
 335
 336 /// Left-click
 337 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 338 {
 339     SetFocus();
 340
 341     wxClientDC dc(this);
 342     PrepareDC(dc);
 343     dc.SetFont(GetFont());
 344
 345     long position = 0;
 346     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 347
 348     if (hit != wxRICHTEXT_HITTEST_NONE)
 349     {
 350         m_dragStart = event.GetLogicalPosition(dc);
 351         m_dragging = true;
 352         CaptureMouse();
 353
 354         SelectNone();
 355
 356         bool caretAtLineStart = false;
 357
 358         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 359         {
 360             // If we're at the start of a line (but not first in para)
 361             // then we should keep the caret showing at the start of the line
 362             // by showing the m_caretAtLineStart flag.
 363             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 364             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 365
 366             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 367                 caretAtLineStart = true;
 368             position --;
 369         }
 370
 371         MoveCaret(position, caretAtLineStart);
 372         SetDefaultStyleToCursorStyle();
 373     }
 374
 375     event.Skip();
 376 }
 377
 378 /// Left-up
 379 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 380 {
 381     if (m_dragging)
 382     {
 383         m_dragging = false;
 384         if (GetCapture() == this)
 385             ReleaseMouse();
 386
 387         // See if we clicked on a URL
 388         wxClientDC dc(this);
 389         PrepareDC(dc);
 390         dc.SetFont(GetFont());
 391
 392         long position = 0;
 393         wxPoint logicalPt = event.GetLogicalPosition(dc);
 394         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 395
 396         if (hit != wxRICHTEXT_HITTEST_NONE)
 397         {
 398             wxRichTextEvent cmdEvent(
 399                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 400                 GetId());
 401             cmdEvent.SetEventObject(this);
 402             cmdEvent.SetPosition(m_caretPosition+1);
 403
 404             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 405             {
 406                 wxTextAttr attr;
 407                 if (GetStyle(position, attr))
 408                 {
 409                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 410                     {
 411                         wxString urlTarget = attr.GetURL();
 412                         if (!urlTarget.IsEmpty())
 413                         {
 414                             wxMouseEvent mouseEvent(event);
 415
 416                             long startPos = 0, endPos = 0;
 417                             wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 418                             if (obj)
 419                             {
 420                                 startPos = obj->GetRange().GetStart();
 421                                 endPos = obj->GetRange().GetEnd();
 422                             }
 423
 424                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 425                             InitCommandEvent(urlEvent);
 426
 427                             urlEvent.SetString(urlTarget);
 428
 429                             GetEventHandler()->ProcessEvent(urlEvent);
 430                         }
 431                     }
 432                 }
 433             }
 434         }
 435     }
 436 }
 437
 438 /// Left-click
 439 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 440 {
 441     wxClientDC dc(this);
 442     PrepareDC(dc);
 443     dc.SetFont(GetFont());
 444
 445     long position = 0;
 446     wxPoint logicalPt = event.GetLogicalPosition(dc);
 447     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 448
 449     // See if we need to change the cursor
 450
 451     {
 452         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 453         {
 454             wxTextAttr attr;
 455             if (GetStyle(position, attr))
 456             {
 457                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 458                 {
 459                     SetCursor(m_urlCursor);
 460                 }
 461                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 462                 {
 463                     SetCursor(m_textCursor);
 464                 }
 465             }
 466         }
 467         else
 468             SetCursor(m_textCursor);
 469     }
 470
 471     if (!event.Dragging())
 472     {
 473         event.Skip();
 474         return;
 475     }
 476
 477     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 478     {
 479         // TODO: test closeness
 480
 481         bool caretAtLineStart = false;
 482
 483         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 484         {
 485             // If we're at the start of a line (but not first in para)
 486             // then we should keep the caret showing at the start of the line
 487             // by showing the m_caretAtLineStart flag.
 488             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 489             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 490
 491             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 492                 caretAtLineStart = true;
 493             position --;
 494         }
 495
 496         if (m_caretPosition != position)
 497         {
 498             bool extendSel = ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 499
 500             MoveCaret(position, caretAtLineStart);
 501             SetDefaultStyleToCursorStyle();
 502
 503             if (extendSel)
 504                 Refresh(false);
 505         }
 506     }
 507 }
 508
 509 /// Right-click
 510 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 511 {
 512     SetFocus();
 513
 514     wxRichTextEvent cmdEvent(
 515         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 516         GetId());
 517     cmdEvent.SetEventObject(this);
 518     cmdEvent.SetPosition(m_caretPosition+1);
 519
 520     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 521         event.Skip();
 522 }
 523
 524 /// Left-double-click
 525 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 526 {
 527     wxRichTextEvent cmdEvent(
 528         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
 529         GetId());
 530     cmdEvent.SetEventObject(this);
 531     cmdEvent.SetPosition(m_caretPosition+1);
 532
 533     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 534     {
 535         SelectWord(GetCaretPosition()+1);
 536     }
 537 }
 538
 539 /// Middle-click
 540 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 541 {
 542     wxRichTextEvent cmdEvent(
 543         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
 544         GetId());
 545     cmdEvent.SetEventObject(this);
 546     cmdEvent.SetPosition(m_caretPosition+1);
 547
 548     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 549         event.Skip();
 550 }
 551
 552 /// Key press
 553 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 554 {
 555     int flags = 0;
 556     if (event.CmdDown())
 557         flags |= wxRICHTEXT_CTRL_DOWN;
 558     if (event.ShiftDown())
 559         flags |= wxRICHTEXT_SHIFT_DOWN;
 560     if (event.AltDown())
 561         flags |= wxRICHTEXT_ALT_DOWN;
 562
 563     if (event.GetKeyCode() == WXK_LEFT ||
 564         event.GetKeyCode() == WXK_RIGHT ||
 565         event.GetKeyCode() == WXK_UP ||
 566         event.GetKeyCode() == WXK_DOWN ||
 567         event.GetKeyCode() == WXK_HOME ||
 568         event.GetKeyCode() == WXK_PAGEUP ||
 569         event.GetKeyCode() == WXK_PAGEDOWN ||
 570         event.GetKeyCode() == WXK_END ||
 571
 572         event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 573         event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 574         event.GetKeyCode() == WXK_NUMPAD_UP ||
 575         event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 576         event.GetKeyCode() == WXK_NUMPAD_HOME ||
 577         event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 578         event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 579         event.GetKeyCode() == WXK_NUMPAD_END)
 580     {
 581         KeyboardNavigate(event.GetKeyCode(), flags);
 582         return;
 583     }
 584
 585     // all the other keys modify the controls contents which shouldn't be
 586     // possible if we're read-only
 587     if ( !IsEditable() )
 588     {
 589         event.Skip();
 590         return;
 591     }
 592
 593     if (event.GetKeyCode() == WXK_RETURN)
 594     {
 595         BeginBatchUndo(_("Insert Text"));
 596
 597         long newPos = m_caretPosition;
 598
 599         DeleteSelectedContent(& newPos);
 600
 601         if (event.ShiftDown())
 602         {
 603             wxString text;
 604             text = wxRichTextLineBreakChar;
 605             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 606         }
 607         else
 608             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
 609
 610         EndBatchUndo();
 611         SetDefaultStyleToCursorStyle();
 612
 613         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 614
 615         wxRichTextEvent cmdEvent(
 616             wxEVT_COMMAND_RICHTEXT_RETURN,
 617             GetId());
 618         cmdEvent.SetEventObject(this);
 619         cmdEvent.SetFlags(flags);
 620         cmdEvent.SetPosition(newPos+1);
 621
 622         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 623         {
 624             // Generate conventional event
 625             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 626             InitCommandEvent(textEvent);
 627
 628             GetEventHandler()->ProcessEvent(textEvent);
 629         }
 630         Update();
 631     }
 632     else if (event.GetKeyCode() == WXK_BACK)
 633     {
 634         BeginBatchUndo(_("Delete Text"));
 635
 636         // Submit range in character positions, which are greater than caret positions,
 637         // so subtract 1 for deleted character and add 1 for conversion to character position.
 638         if (m_caretPosition > -1 && !HasSelection())
 639         {
 640             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition, m_caretPosition), this);
 641         }
 642         else
 643             DeleteSelectedContent();
 644
 645         EndBatchUndo();
 646
 647         if (GetLastPosition() == -1)
 648         {
 649             GetBuffer().Reset();
 650
 651             m_caretPosition = -1;
 652             PositionCaret();
 653             SetDefaultStyleToCursorStyle();
 654         }
 655
 656         ScrollIntoView(m_caretPosition, WXK_LEFT);
 657
 658         wxRichTextEvent cmdEvent(
 659             wxEVT_COMMAND_RICHTEXT_DELETE,
 660             GetId());
 661         cmdEvent.SetEventObject(this);
 662         cmdEvent.SetFlags(flags);
 663         cmdEvent.SetPosition(m_caretPosition+1);
 664         GetEventHandler()->ProcessEvent(cmdEvent);
 665
 666         Update();
 667     }
 668     else if (event.GetKeyCode() == WXK_DELETE)
 669     {
 670         BeginBatchUndo(_("Delete Text"));
 671
 672         // Submit range in character positions, which are greater than caret positions,
 673         if (m_caretPosition < GetBuffer().GetRange().GetEnd()+1 && !HasSelection())
 674         {
 675             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition+1, m_caretPosition+1), this);
 676         }
 677         else
 678             DeleteSelectedContent();
 679
 680         EndBatchUndo();
 681
 682         if (GetLastPosition() == -1)
 683         {
 684             GetBuffer().Reset();
 685
 686             m_caretPosition = -1;
 687             PositionCaret();
 688             SetDefaultStyleToCursorStyle();
 689         }
 690
 691         wxRichTextEvent cmdEvent(
 692             wxEVT_COMMAND_RICHTEXT_DELETE,
 693             GetId());
 694         cmdEvent.SetEventObject(this);
 695         cmdEvent.SetFlags(flags);
 696         cmdEvent.SetPosition(m_caretPosition+1);
 697         GetEventHandler()->ProcessEvent(cmdEvent);
 698
 699         Update();
 700     }
 701     else
 702     {
 703         long keycode = event.GetKeyCode();
 704         switch ( keycode )
 705         {
 706             case WXK_ESCAPE:
 707             case WXK_DELETE:
 708             case WXK_START:
 709             case WXK_LBUTTON:
 710             case WXK_RBUTTON:
 711             case WXK_CANCEL:
 712             case WXK_MBUTTON:
 713             case WXK_CLEAR:
 714             case WXK_SHIFT:
 715             case WXK_ALT:
 716             case WXK_CONTROL:
 717             case WXK_MENU:
 718             case WXK_PAUSE:
 719             case WXK_CAPITAL:
 720             case WXK_END:
 721             case WXK_HOME:
 722             case WXK_LEFT:
 723             case WXK_UP:
 724             case WXK_RIGHT:
 725             case WXK_DOWN:
 726             case WXK_SELECT:
 727             case WXK_PRINT:
 728             case WXK_EXECUTE:
 729             case WXK_SNAPSHOT:
 730             case WXK_INSERT:
 731             case WXK_HELP:
 732             case WXK_NUMPAD0:
 733             case WXK_NUMPAD1:
 734             case WXK_NUMPAD2:
 735             case WXK_NUMPAD3:
 736             case WXK_NUMPAD4:
 737             case WXK_NUMPAD5:
 738             case WXK_NUMPAD6:
 739             case WXK_NUMPAD7:
 740             case WXK_NUMPAD8:
 741             case WXK_NUMPAD9:
 742             case WXK_MULTIPLY:
 743             case WXK_ADD:
 744             case WXK_SEPARATOR:
 745             case WXK_SUBTRACT:
 746             case WXK_DECIMAL:
 747             case WXK_DIVIDE:
 748             case WXK_F1:
 749             case WXK_F2:
 750             case WXK_F3:
 751             case WXK_F4:
 752             case WXK_F5:
 753             case WXK_F6:
 754             case WXK_F7:
 755             case WXK_F8:
 756             case WXK_F9:
 757             case WXK_F10:
 758             case WXK_F11:
 759             case WXK_F12:
 760             case WXK_F13:
 761             case WXK_F14:
 762             case WXK_F15:
 763             case WXK_F16:
 764             case WXK_F17:
 765             case WXK_F18:
 766             case WXK_F19:
 767             case WXK_F20:
 768             case WXK_F21:
 769             case WXK_F22:
 770             case WXK_F23:
 771             case WXK_F24:
 772             case WXK_NUMLOCK:
 773             case WXK_SCROLL:
 774             case WXK_PAGEUP:
 775             case WXK_PAGEDOWN:
 776             case WXK_NUMPAD_SPACE:
 777             case WXK_NUMPAD_TAB:
 778             case WXK_NUMPAD_ENTER:
 779             case WXK_NUMPAD_F1:
 780             case WXK_NUMPAD_F2:
 781             case WXK_NUMPAD_F3:
 782             case WXK_NUMPAD_F4:
 783             case WXK_NUMPAD_HOME:
 784             case WXK_NUMPAD_LEFT:
 785             case WXK_NUMPAD_UP:
 786             case WXK_NUMPAD_RIGHT:
 787             case WXK_NUMPAD_DOWN:
 788             case WXK_NUMPAD_PAGEUP:
 789             case WXK_NUMPAD_PAGEDOWN:
 790             case WXK_NUMPAD_END:
 791             case WXK_NUMPAD_BEGIN:
 792             case WXK_NUMPAD_INSERT:
 793             case WXK_NUMPAD_DELETE:
 794             case WXK_NUMPAD_EQUAL:
 795             case WXK_NUMPAD_MULTIPLY:
 796             case WXK_NUMPAD_ADD:
 797             case WXK_NUMPAD_SEPARATOR:
 798             case WXK_NUMPAD_SUBTRACT:
 799             case WXK_NUMPAD_DECIMAL:
 800             case WXK_WINDOWS_LEFT:
 801             {
 802                 event.Skip();
 803                 return;
 804             }
 805
 806             default:
 807             {
 808                 if (event.CmdDown() || event.AltDown())
 809                 {
 810                     event.Skip();
 811                     return;
 812                 }
 813
 814                 wxRichTextEvent cmdEvent(
 815                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
 816                     GetId());
 817                 cmdEvent.SetEventObject(this);
 818                 cmdEvent.SetFlags(flags);
 819 #if wxUSE_UNICODE
 820                 cmdEvent.SetCharacter(event.GetUnicodeKey());
 821 #else
 822                 cmdEvent.SetCharacter((wxChar) keycode);
 823 #endif
 824                 cmdEvent.SetPosition(m_caretPosition+1);
 825
 826                 if (keycode == wxT('\t'))
 827                 {
 828                     // See if we need to promote or demote the selection or paragraph at the cursor
 829                     // position, instead of inserting a tab.
 830                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
 831                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
 832                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
 833                     {
 834                         wxRichTextRange range;
 835                         if (HasSelection())
 836                             range = GetSelectionRange();
 837                         else
 838                             range = para->GetRange().FromInternal();
 839
 840                         int promoteBy = event.ShiftDown() ? 1 : -1;
 841
 842                         PromoteList(promoteBy, range, NULL);
 843
 844                         GetEventHandler()->ProcessEvent(cmdEvent);
 845
 846                         return;
 847                     }
 848                 }
 849
 850                 BeginBatchUndo(_("Insert Text"));
 851
 852                 long newPos = m_caretPosition;
 853                 DeleteSelectedContent(& newPos);
 854
 855 #if wxUSE_UNICODE
 856                 wxString str = event.GetUnicodeKey();
 857 #else
 858                 wxString str = (wxChar) event.GetKeyCode();
 859 #endif
 860                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
 861
 862                 EndBatchUndo();
 863
 864                 SetDefaultStyleToCursorStyle();
 865                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
 866
 867                 GetEventHandler()->ProcessEvent(cmdEvent);
 868
 869                 Update();
 870             }
 871         }
 872     }
 873 }
 874
 875 /// Delete content if there is a selection, e.g. when pressing a key.
 876 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
 877 {
 878     if (HasSelection())
 879     {
 880         long pos = m_selectionRange.GetStart();
 881         GetBuffer().DeleteRangeWithUndo(m_selectionRange, this);
 882         m_selectionRange.SetRange(-2, -2);
 883
 884         if (newPos)
 885             *newPos = pos-1;
 886         return true;
 887     }
 888     else
 889         return false;
 890 }
 891
 892 /// Keyboard navigation
 893
 894 /*
 895
 896 Left:       left one character
 897 Right:      right one character
 898 Up:         up one line
 899 Down:       down one line
 900 Ctrl-Left:  left one word
 901 Ctrl-Right: right one word
 902 Ctrl-Up:    previous paragraph start
 903 Ctrl-Down:  next start of paragraph
 904 Home:       start of line
 905 End:        end of line
 906 Ctrl-Home:  start of document
 907 Ctrl-End:   end of document
 908 Page-Up:    Up a screen
 909 Page-Down:  Down a screen
 910
 911 Maybe:
 912
 913 Ctrl-Alt-PgUp: Start of window
 914 Ctrl-Alt-PgDn: End of window
 915 F8:         Start selection mode
 916 Esc:        End selection mode
 917
 918 Adding Shift does the above but starts/extends selection.
 919
 920
 921  */
 922
 923 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
 924 {
 925     bool success = false;
 926
 927     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
 928     {
 929         if (flags & wxRICHTEXT_CTRL_DOWN)
 930             success = WordRight(1, flags);
 931         else
 932             success = MoveRight(1, flags);
 933     }
 934     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
 935     {
 936         if (flags & wxRICHTEXT_CTRL_DOWN)
 937             success = WordLeft(1, flags);
 938         else
 939             success = MoveLeft(1, flags);
 940     }
 941     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
 942     {
 943         if (flags & wxRICHTEXT_CTRL_DOWN)
 944             success = MoveToParagraphStart(flags);
 945         else
 946             success = MoveUp(1, flags);
 947     }
 948     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
 949     {
 950         if (flags & wxRICHTEXT_CTRL_DOWN)
 951             success = MoveToParagraphEnd(flags);
 952         else
 953             success = MoveDown(1, flags);
 954     }
 955     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
 956     {
 957         success = PageUp(1, flags);
 958     }
 959     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
 960     {
 961         success = PageDown(1, flags);
 962     }
 963     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
 964     {
 965         if (flags & wxRICHTEXT_CTRL_DOWN)
 966             success = MoveHome(flags);
 967         else
 968             success = MoveToLineStart(flags);
 969     }
 970     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
 971     {
 972         if (flags & wxRICHTEXT_CTRL_DOWN)
 973             success = MoveEnd(flags);
 974         else
 975             success = MoveToLineEnd(flags);
 976     }
 977
 978     if (success)
 979     {
 980         ScrollIntoView(m_caretPosition, keyCode);
 981         SetDefaultStyleToCursorStyle();
 982     }
 983
 984     return success;
 985 }
 986
 987 /// Extend the selection. Selections are in caret positions.
 988 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
 989 {
 990     if (flags & wxRICHTEXT_SHIFT_DOWN)
 991     {
 992         // If not currently selecting, start selecting
 993         if (m_selectionRange.GetStart() == -2)
 994         {
 995             m_selectionAnchor = oldPos;
 996
 997             if (oldPos > newPos)
 998                 m_selectionRange.SetRange(newPos+1, oldPos);
 999             else
1000                 m_selectionRange.SetRange(oldPos+1, newPos);
1001         }
1002         else
1003         {
1004             // Always ensure that the selection range start is greater than
1005             // the end.
1006             if (newPos > m_selectionAnchor)
1007                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
1008             else
1009                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
1010         }
1011
1012         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
1013         {
1014             wxLogDebug(wxT("Strange selection range"));
1015         }
1016
1017         return true;
1018     }
1019     else
1020         return false;
1021 }
1022
1023 /// Scroll into view, returning true if we scrolled.
1024 /// This takes a _caret_ position.
1025 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1026 {
1027     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1028
1029     if (!line)
1030         return false;
1031
1032     int ppuX, ppuY;
1033     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1034
1035     int startXUnits, startYUnits;
1036     GetViewStart(& startXUnits, & startYUnits);
1037     int startY = startYUnits * ppuY;
1038
1039     int sx = 0, sy = 0;
1040     GetVirtualSize(& sx, & sy);
1041     int sxUnits = 0;
1042     int syUnits = 0;
1043     if (ppuY != 0)
1044         syUnits = sy/ppuY;
1045
1046     wxRect rect = line->GetRect();
1047
1048     bool scrolled = false;
1049
1050     wxSize clientSize = GetClientSize();
1051
1052     // Going down
1053     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1054         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1055         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1056         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1057     {
1058         if ((rect.y + rect.height) > (clientSize.y + startY))
1059         {
1060             // Make it scroll so this item is at the bottom
1061             // of the window
1062             int y = rect.y - (clientSize.y - rect.height);
1063             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1064
1065             // If we're still off the screen, scroll another line down
1066             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1067                 yUnits ++;
1068
1069             if (startYUnits != yUnits)
1070             {
1071                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1072                 scrolled = true;
1073             }
1074         }
1075         else if (rect.y < startY)
1076         {
1077             // Make it scroll so this item is at the top
1078             // of the window
1079             int y = rect.y ;
1080             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1081
1082             if (startYUnits != yUnits)
1083             {
1084                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1085                 scrolled = true;
1086             }
1087         }
1088     }
1089     // Going up
1090     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1091              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1092              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1093              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1094     {
1095         if (rect.y < startY)
1096         {
1097             // Make it scroll so this item is at the top
1098             // of the window
1099             int y = rect.y ;
1100             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1101
1102             if (startYUnits != yUnits)
1103             {
1104                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1105                 scrolled = true;
1106             }
1107         }
1108         else if ((rect.y + rect.height) > (clientSize.y + startY))
1109         {
1110             // Make it scroll so this item is at the bottom
1111             // of the window
1112             int y = rect.y - (clientSize.y - rect.height);
1113             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1114
1115             // If we're still off the screen, scroll another line down
1116             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1117                 yUnits ++;
1118
1119             if (startYUnits != yUnits)
1120             {
1121                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1122                 scrolled = true;
1123             }
1124         }
1125     }
1126     PositionCaret();
1127
1128     return scrolled;
1129 }
1130
1131 /// Is the given position visible on the screen?
1132 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1133 {
1134     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1135
1136     if (!line)
1137         return false;
1138
1139     int ppuX, ppuY;
1140     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1141
1142     int startX, startY;
1143     GetViewStart(& startX, & startY);
1144     startX = 0;
1145     startY = startY * ppuY;
1146
1147     wxRect rect = line->GetRect();
1148     wxSize clientSize = GetClientSize();
1149
1150     return (rect.GetBottom() > startY) && (rect.GetTop() < (startY + clientSize.y));
1151 }
1152
1153 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1154 {
1155     m_caretPosition = position;
1156     m_caretAtLineStart = showAtLineStart;
1157 }
1158
1159 /// Move caret one visual step forward: this may mean setting a flag
1160 /// and keeping the same position if we're going from the end of one line
1161 /// to the start of the next, which may be the exact same caret position.
1162 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1163 {
1164     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1165
1166     // Only do the check if we're not at the end of the paragraph (where things work OK
1167     // anyway)
1168     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1169     {
1170         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1171
1172         if (line)
1173         {
1174             wxRichTextRange lineRange = line->GetAbsoluteRange();
1175
1176             // We're at the end of a line. See whether we need to
1177             // stay at the same actual caret position but change visual
1178             // position, or not.
1179             if (oldPosition == lineRange.GetEnd())
1180             {
1181                 if (m_caretAtLineStart)
1182                 {
1183                     // We're already at the start of the line, so actually move on now.
1184                     m_caretPosition = oldPosition + 1;
1185                     m_caretAtLineStart = false;
1186                 }
1187                 else
1188                 {
1189                     // We're showing at the end of the line, so keep to
1190                     // the same position but indicate that we're to show
1191                     // at the start of the next line.
1192                     m_caretPosition = oldPosition;
1193                     m_caretAtLineStart = true;
1194                 }
1195                 SetDefaultStyleToCursorStyle();
1196                 return;
1197             }
1198         }
1199     }
1200     m_caretPosition ++;
1201     SetDefaultStyleToCursorStyle();
1202 }
1203
1204 /// Move caret one visual step backward: this may mean setting a flag
1205 /// and keeping the same position if we're going from the end of one line
1206 /// to the start of the next, which may be the exact same caret position.
1207 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1208 {
1209     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1210
1211     // Only do the check if we're not at the start of the paragraph (where things work OK
1212     // anyway)
1213     if (para && (oldPosition != para->GetRange().GetStart()))
1214     {
1215         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1216
1217         if (line)
1218         {
1219             wxRichTextRange lineRange = line->GetAbsoluteRange();
1220
1221             // We're at the start of a line. See whether we need to
1222             // stay at the same actual caret position but change visual
1223             // position, or not.
1224             if (oldPosition == lineRange.GetStart())
1225             {
1226                 m_caretPosition = oldPosition-1;
1227                 m_caretAtLineStart = true;
1228                 return;
1229             }
1230             else if (oldPosition == lineRange.GetEnd())
1231             {
1232                 if (m_caretAtLineStart)
1233                 {
1234                     // We're at the start of the line, so keep the same caret position
1235                     // but clear the start-of-line flag.
1236                     m_caretPosition = oldPosition;
1237                     m_caretAtLineStart = false;
1238                 }
1239                 else
1240                 {
1241                     // We're showing at the end of the line, so go back
1242                     // to the previous character position.
1243                     m_caretPosition = oldPosition - 1;
1244                 }
1245                 SetDefaultStyleToCursorStyle();
1246                 return;
1247             }
1248         }
1249     }
1250     m_caretPosition --;
1251     SetDefaultStyleToCursorStyle();
1252 }
1253
1254 /// Move right
1255 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1256 {
1257     long endPos = GetBuffer().GetRange().GetEnd();
1258
1259     if (m_caretPosition + noPositions < endPos)
1260     {
1261         long oldPos = m_caretPosition;
1262         long newPos = m_caretPosition + noPositions;
1263
1264         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1265         if (!extendSel)
1266             SelectNone();
1267
1268         // Determine by looking at oldPos and m_caretPosition whether
1269         // we moved from the end of a line to the start of the next line, in which case
1270         // we want to adjust the caret position such that it is positioned at the
1271         // start of the next line, rather than jumping past the first character of the
1272         // line.
1273         if (noPositions == 1 && !extendSel)
1274             MoveCaretForward(oldPos);
1275         else
1276             SetCaretPosition(newPos);
1277
1278         PositionCaret();
1279         SetDefaultStyleToCursorStyle();
1280
1281         if (extendSel)
1282             Refresh(false);
1283         return true;
1284     }
1285     else
1286         return false;
1287 }
1288
1289 /// Move left
1290 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1291 {
1292     long startPos = -1;
1293
1294     if (m_caretPosition > startPos - noPositions + 1)
1295     {
1296         long oldPos = m_caretPosition;
1297         long newPos = m_caretPosition - noPositions;
1298         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1299         if (!extendSel)
1300             SelectNone();
1301
1302         if (noPositions == 1 && !extendSel)
1303             MoveCaretBack(oldPos);
1304         else
1305             SetCaretPosition(newPos);
1306
1307         PositionCaret();
1308         SetDefaultStyleToCursorStyle();
1309
1310         if (extendSel)
1311             Refresh(false);
1312         return true;
1313     }
1314     else
1315         return false;
1316 }
1317
1318 /// Move up
1319 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1320 {
1321     return MoveDown(- noLines, flags);
1322 }
1323
1324 /// Move up
1325 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1326 {
1327     if (!GetCaret())
1328         return false;
1329
1330     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1331     wxPoint pt = GetCaret()->GetPosition();
1332     long newLine = lineNumber + noLines;
1333
1334     if (lineNumber != -1)
1335     {
1336         if (noLines > 0)
1337         {
1338             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1339
1340             if (newLine > lastLine)
1341                 return false;
1342         }
1343         else
1344         {
1345             if (newLine < 0)
1346                 return false;
1347         }
1348     }
1349
1350     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1351     if (lineObj)
1352     {
1353         pt.y = lineObj->GetAbsolutePosition().y + 2;
1354     }
1355     else
1356         return false;
1357
1358     long newPos = 0;
1359     wxClientDC dc(this);
1360     PrepareDC(dc);
1361     dc.SetFont(GetFont());
1362
1363     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1364
1365     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1366     {
1367         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1368         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1369         // so we view the caret at the start of the line.
1370         bool caretLineStart = false;
1371         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1372         {
1373             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1374             wxRichTextRange lineRange;
1375             if (thisLine)
1376                 lineRange = thisLine->GetAbsoluteRange();
1377
1378             if (thisLine && (newPos-1) == lineRange.GetEnd())
1379             {
1380                 newPos --;
1381                 caretLineStart = true;
1382             }
1383             else
1384             {
1385                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1386                 if (para && para->GetRange().GetStart() == newPos)
1387                     newPos --;
1388             }
1389         }
1390
1391         long newSelEnd = newPos;
1392
1393         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1394         if (!extendSel)
1395             SelectNone();
1396
1397         SetCaretPosition(newPos, caretLineStart);
1398         PositionCaret();
1399         SetDefaultStyleToCursorStyle();
1400
1401         if (extendSel)
1402             Refresh(false);
1403         return true;
1404     }
1405
1406     return false;
1407 }
1408
1409 /// Move to the end of the paragraph
1410 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1411 {
1412     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1413     if (para)
1414     {
1415         long newPos = para->GetRange().GetEnd() - 1;
1416         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1417         if (!extendSel)
1418             SelectNone();
1419
1420         SetCaretPosition(newPos);
1421         PositionCaret();
1422         SetDefaultStyleToCursorStyle();
1423
1424         if (extendSel)
1425             Refresh(false);
1426         return true;
1427     }
1428
1429     return false;
1430 }
1431
1432 /// Move to the start of the paragraph
1433 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1434 {
1435     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1436     if (para)
1437     {
1438         long newPos = para->GetRange().GetStart() - 1;
1439         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1440         if (!extendSel)
1441             SelectNone();
1442
1443         SetCaretPosition(newPos);
1444         PositionCaret();
1445         SetDefaultStyleToCursorStyle();
1446
1447         if (extendSel)
1448             Refresh(false);
1449         return true;
1450     }
1451
1452     return false;
1453 }
1454
1455 /// Move to the end of the line
1456 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1457 {
1458     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1459
1460     if (line)
1461     {
1462         wxRichTextRange lineRange = line->GetAbsoluteRange();
1463         long newPos = lineRange.GetEnd();
1464         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1465         if (!extendSel)
1466             SelectNone();
1467
1468         SetCaretPosition(newPos);
1469         PositionCaret();
1470         SetDefaultStyleToCursorStyle();
1471
1472         if (extendSel)
1473             Refresh(false);
1474         return true;
1475     }
1476
1477     return false;
1478 }
1479
1480 /// Move to the start of the line
1481 bool wxRichTextCtrl::MoveToLineStart(int flags)
1482 {
1483     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1484     if (line)
1485     {
1486         wxRichTextRange lineRange = line->GetAbsoluteRange();
1487         long newPos = lineRange.GetStart()-1;
1488
1489         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1490         if (!extendSel)
1491             SelectNone();
1492
1493         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1494
1495         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1496         PositionCaret();
1497         SetDefaultStyleToCursorStyle();
1498
1499         if (extendSel)
1500             Refresh(false);
1501         return true;
1502     }
1503
1504     return false;
1505 }
1506
1507 /// Move to the start of the buffer
1508 bool wxRichTextCtrl::MoveHome(int flags)
1509 {
1510     if (m_caretPosition != -1)
1511     {
1512         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1513         if (!extendSel)
1514             SelectNone();
1515
1516         SetCaretPosition(-1);
1517         PositionCaret();
1518         SetDefaultStyleToCursorStyle();
1519
1520         if (extendSel)
1521             Refresh(false);
1522         return true;
1523     }
1524     else
1525         return false;
1526 }
1527
1528 /// Move to the end of the buffer
1529 bool wxRichTextCtrl::MoveEnd(int flags)
1530 {
1531     long endPos = GetBuffer().GetRange().GetEnd()-1;
1532
1533     if (m_caretPosition != endPos)
1534     {
1535         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1536         if (!extendSel)
1537             SelectNone();
1538
1539         SetCaretPosition(endPos);
1540         PositionCaret();
1541         SetDefaultStyleToCursorStyle();
1542
1543         if (extendSel)
1544             Refresh(false);
1545         return true;
1546     }
1547     else
1548         return false;
1549 }
1550
1551 /// Move noPages pages up
1552 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1553 {
1554     return PageDown(- noPages, flags);
1555 }
1556
1557 /// Move noPages pages down
1558 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1559 {
1560     // Calculate which line occurs noPages * screen height further down.
1561     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1562     if (line)
1563     {
1564         wxSize clientSize = GetClientSize();
1565         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1566
1567         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1568         if (newLine)
1569         {
1570             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1571             long pos = lineRange.GetStart()-1;
1572             if (pos != m_caretPosition)
1573             {
1574                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1575
1576                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1577                 if (!extendSel)
1578                     SelectNone();
1579
1580                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1581                 PositionCaret();
1582                 SetDefaultStyleToCursorStyle();
1583
1584                 if (extendSel)
1585                     Refresh(false);
1586                 return true;
1587             }
1588         }
1589     }
1590
1591     return false;
1592 }
1593
1594 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1595 {
1596     return str == wxT(" ") || str == wxT("\t");
1597 }
1598
1599 // Finds the caret position for the next word
1600 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1601 {
1602     long endPos = GetBuffer().GetRange().GetEnd();
1603
1604     if (direction > 0)
1605     {
1606         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1607
1608         // First skip current text to space
1609         while (i < endPos && i > -1)
1610         {
1611             // i is in character, not caret positions
1612             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1613             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1614             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1615             {
1616                 break;
1617             }
1618             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1619                 i += direction;
1620             else
1621             {
1622                 break;
1623             }
1624         }
1625         while (i < endPos && i > -1)
1626         {
1627             // i is in character, not caret positions
1628             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1629             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1630             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1631                 return wxMax(-1, i);
1632
1633             if (text.empty()) // End of paragraph, or maybe an image
1634                 return wxMax(-1, i - 1);
1635             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1636                 i += direction;
1637             else
1638             {
1639                 // Convert to caret position
1640                 return wxMax(-1, i - 1);
1641             }
1642         }
1643         if (i >= endPos)
1644             return endPos-1;
1645         return i-1;
1646     }
1647     else
1648     {
1649         long i = m_caretPosition;
1650
1651         // First skip white space
1652         while (i < endPos && i > -1)
1653         {
1654             // i is in character, not caret positions
1655             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1656             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1657
1658             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1659                 break;
1660             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1661                 i += direction;
1662             else
1663                 break;
1664         }
1665         // Next skip current text to space
1666         while (i < endPos && i > -1)
1667         {
1668             // i is in character, not caret positions
1669             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1670             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1671             if (line && line->GetAbsoluteRange().GetStart() == i)
1672                 return i-1;
1673
1674             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1675                 i += direction;
1676             else
1677             {
1678                 return i;
1679             }
1680         }
1681         if (i < -1)
1682             return -1;
1683         return i;
1684     }
1685 }
1686
1687 /// Move n words left
1688 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1689 {
1690     long pos = FindNextWordPosition(-1);
1691     if (pos != m_caretPosition)
1692     {
1693         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1694
1695         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1696         if (!extendSel)
1697             SelectNone();
1698
1699         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1700         PositionCaret();
1701         SetDefaultStyleToCursorStyle();
1702
1703         if (extendSel)
1704             Refresh(false);
1705         return true;
1706     }
1707
1708     return false;
1709 }
1710
1711 /// Move n words right
1712 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1713 {
1714     long pos = FindNextWordPosition(1);
1715     if (pos != m_caretPosition)
1716     {
1717         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1718
1719         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1720         if (!extendSel)
1721             SelectNone();
1722
1723         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1724         PositionCaret();
1725         SetDefaultStyleToCursorStyle();
1726
1727         if (extendSel)
1728             Refresh(false);
1729         return true;
1730     }
1731
1732     return false;
1733 }
1734
1735 /// Sizing
1736 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1737 {
1738     // Only do sizing optimization for large buffers
1739     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1740     {
1741         m_fullLayoutRequired = true;
1742         m_fullLayoutTime = wxGetLocalTimeMillis();
1743         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1744         LayoutContent(true /* onlyVisibleRect */);
1745     }
1746     else
1747         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1748
1749 #if wxRICHTEXT_BUFFERED_PAINTING
1750     RecreateBuffer();
1751 #endif
1752
1753     event.Skip();
1754 }
1755
1756
1757 /// Idle-time processing
1758 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1759 {
1760     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1761
1762     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1763     {
1764         m_fullLayoutRequired = false;
1765         m_fullLayoutTime = 0;
1766         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1767         ShowPosition(m_fullLayoutSavedPosition);
1768         Refresh(false);
1769     }
1770
1771     if (m_caretPositionForDefaultStyle != -2)
1772     {
1773         // If the caret position has changed, no longer reflect the default style
1774         // in the UI.
1775         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1776             m_caretPositionForDefaultStyle = -2;
1777     }
1778
1779     event.Skip();
1780 }
1781
1782 /// Scrolling
1783 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1784 {
1785     // Not used
1786     event.Skip();
1787 }
1788
1789 /// Set up scrollbars, e.g. after a resize
1790 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1791 {
1792     if (m_freezeCount)
1793         return;
1794
1795     if (GetBuffer().IsEmpty())
1796     {
1797         SetScrollbars(0, 0, 0, 0, 0, 0);
1798         return;
1799     }
1800
1801     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1802     // of pixels. See e.g. wxVScrolledWindow for ideas.
1803     int pixelsPerUnit = 5;
1804     wxSize clientSize = GetClientSize();
1805
1806     int maxHeight = GetBuffer().GetCachedSize().y;
1807
1808     // Round up so we have at least maxHeight pixels
1809     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1810
1811     int startX = 0, startY = 0;
1812     if (!atTop)
1813         GetViewStart(& startX, & startY);
1814
1815     int maxPositionX = 0; // wxMax(sz.x - clientSize.x, 0);
1816     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
1817
1818     // Move to previous scroll position if
1819     // possible
1820     SetScrollbars(0, pixelsPerUnit,
1821         0, unitsY,
1822         wxMin(maxPositionX, startX), wxMin(maxPositionY, startY));
1823 }
1824
1825 /// Paint the background
1826 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1827 {
1828     wxColour backgroundColour = GetBackgroundColour();
1829     if (!backgroundColour.Ok())
1830         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1831
1832     // Clear the background
1833     dc.SetBrush(wxBrush(backgroundColour));
1834     dc.SetPen(*wxTRANSPARENT_PEN);
1835     wxRect windowRect(GetClientSize());
1836     windowRect.x -= 2; windowRect.y -= 2;
1837     windowRect.width += 4; windowRect.height += 4;
1838
1839     // We need to shift the rectangle to take into account
1840     // scrolling. Converting device to logical coordinates.
1841     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1842     dc.DrawRectangle(windowRect);
1843 }
1844
1845 #if wxRICHTEXT_BUFFERED_PAINTING
1846 /// Recreate buffer bitmap if necessary
1847 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1848 {
1849     wxSize sz = size;
1850     if (sz == wxDefaultSize)
1851         sz = GetClientSize();
1852
1853     if (sz.x < 1 || sz.y < 1)
1854         return false;
1855
1856     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1857         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1858     return m_bufferBitmap.Ok();
1859 }
1860 #endif
1861
1862 // ----------------------------------------------------------------------------
1863 // file IO functions
1864 // ----------------------------------------------------------------------------
1865
1866 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
1867 {
1868     bool success = GetBuffer().LoadFile(filename, fileType);
1869     if (success)
1870         m_filename = filename;
1871
1872     DiscardEdits();
1873     SetInsertionPoint(0);
1874     LayoutContent();
1875     PositionCaret();
1876     SetupScrollbars(true);
1877     Refresh(false);
1878     wxTextCtrl::SendTextUpdatedEvent(this);
1879
1880     if (success)
1881         return true;
1882     else
1883     {
1884         wxLogError(_("File couldn't be loaded."));
1885
1886         return false;
1887     }
1888 }
1889
1890 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
1891 {
1892     if (GetBuffer().SaveFile(filename, fileType))
1893     {
1894         m_filename = filename;
1895
1896         DiscardEdits();
1897
1898         return true;
1899     }
1900
1901     wxLogError(_("The text couldn't be saved."));
1902
1903     return false;
1904 }
1905
1906 // ----------------------------------------------------------------------------
1907 // wxRichTextCtrl specific functionality
1908 // ----------------------------------------------------------------------------
1909
1910 /// Add a new paragraph of text to the end of the buffer
1911 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
1912 {
1913     return GetBuffer().AddParagraph(text);
1914 }
1915
1916 /// Add an image
1917 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
1918 {
1919     return GetBuffer().AddImage(image);
1920 }
1921
1922 // ----------------------------------------------------------------------------
1923 // selection and ranges
1924 // ----------------------------------------------------------------------------
1925
1926 void wxRichTextCtrl::SelectAll()
1927 {
1928     SetSelection(0, GetLastPosition()+1);
1929     m_selectionAnchor = -1;
1930 }
1931
1932 /// Select none
1933 void wxRichTextCtrl::SelectNone()
1934 {
1935     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
1936         SetSelection(-2, -2);
1937     m_selectionAnchor = -2;
1938 }
1939
1940 static bool wxIsWordDelimiter(const wxString& text)
1941 {
1942     return !text.IsEmpty() && !wxIsalnum(text[0]);
1943 }
1944
1945 /// Select the word at the given character position
1946 bool wxRichTextCtrl::SelectWord(long position)
1947 {
1948     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
1949         return false;
1950
1951     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
1952     if (!para)
1953         return false;
1954
1955     long positionStart = position;
1956     long positionEnd = position;
1957
1958     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
1959     {
1960         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
1961         if (wxIsWordDelimiter(text))
1962         {
1963             positionStart ++;
1964             break;
1965         }
1966     }
1967     if (positionStart < para->GetRange().GetStart())
1968         positionStart = para->GetRange().GetStart();
1969
1970     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
1971     {
1972         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
1973         if (wxIsWordDelimiter(text))
1974         {
1975             positionEnd --;
1976             break;
1977         }
1978     }
1979     if (positionEnd >= para->GetRange().GetEnd())
1980         positionEnd = para->GetRange().GetEnd();
1981
1982     SetSelection(positionStart, positionEnd+1);
1983
1984     if (positionStart >= 0)
1985     {
1986         MoveCaret(positionStart-1, true);
1987         SetDefaultStyleToCursorStyle();
1988     }
1989
1990     return true;
1991 }
1992
1993 wxString wxRichTextCtrl::GetStringSelection() const
1994 {
1995     long from, to;
1996     GetSelection(&from, &to);
1997
1998     return GetRange(from, to);
1999 }
2000
2001 // ----------------------------------------------------------------------------
2002 // hit testing
2003 // ----------------------------------------------------------------------------
2004
2005 wxTextCtrlHitTestResult
2006 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2007 {
2008     // implement in terms of the other overload as the native ports typically
2009     // can get the position and not (x, y) pair directly (although wxUniv
2010     // directly gets x and y -- and so overrides this method as well)
2011     long pos;
2012     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2013
2014     if ( rc != wxTE_HT_UNKNOWN )
2015     {
2016         PositionToXY(pos, x, y);
2017     }
2018
2019     return rc;
2020 }
2021
2022 wxTextCtrlHitTestResult
2023 wxRichTextCtrl::HitTest(const wxPoint& pt,
2024                         long * pos) const
2025 {
2026     wxClientDC dc((wxRichTextCtrl*) this);
2027     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2028
2029     // Buffer uses logical position (relative to start of buffer)
2030     // so convert
2031     wxPoint pt2 = GetLogicalPoint(pt);
2032
2033     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
2034
2035     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2036         return wxTE_HT_BEFORE;
2037     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2038         return wxTE_HT_BEYOND;
2039     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2040         return wxTE_HT_ON_TEXT;
2041
2042     return wxTE_HT_UNKNOWN;
2043 }
2044
2045 // ----------------------------------------------------------------------------
2046 // set/get the controls text
2047 // ----------------------------------------------------------------------------
2048
2049 wxString wxRichTextCtrl::GetValue() const
2050 {
2051     return GetBuffer().GetText();
2052 }
2053
2054 wxString wxRichTextCtrl::GetRange(long from, long to) const
2055 {
2056     // Public API for range is different from internals
2057     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2058 }
2059
2060 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2061 {
2062     Clear();
2063
2064     if (!value.IsEmpty())
2065     {
2066         // Remove empty paragraph
2067         GetBuffer().Clear();
2068         DoWriteText(value);
2069
2070         // for compatibility, don't move the cursor when doing SetValue()
2071         SetInsertionPoint(0);
2072     }
2073     else
2074     {
2075         // still send an event for consistency
2076         if (flags & SetValue_SendEvent)
2077             wxTextCtrl::SendTextUpdatedEvent(this);
2078     }
2079     DiscardEdits();
2080 }
2081
2082 void wxRichTextCtrl::WriteText(const wxString& value)
2083 {
2084     DoWriteText(value);
2085 }
2086
2087 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2088 {
2089     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2090
2091     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2092
2093     if ( flags & SetValue_SendEvent )
2094         wxTextCtrl::SendTextUpdatedEvent(this);
2095 }
2096
2097 void wxRichTextCtrl::AppendText(const wxString& text)
2098 {
2099     SetInsertionPointEnd();
2100
2101     WriteText(text);
2102 }
2103
2104 /// Write an image at the current insertion point
2105 bool wxRichTextCtrl::WriteImage(const wxImage& image, int bitmapType)
2106 {
2107     wxRichTextImageBlock imageBlock;
2108
2109     wxImage image2 = image;
2110     if (imageBlock.MakeImageBlock(image2, bitmapType))
2111         return WriteImage(imageBlock);
2112
2113     return false;
2114 }
2115
2116 bool wxRichTextCtrl::WriteImage(const wxString& filename, int bitmapType)
2117 {
2118     wxRichTextImageBlock imageBlock;
2119
2120     wxImage image;
2121     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2122         return WriteImage(imageBlock);
2123
2124     return false;
2125 }
2126
2127 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2128 {
2129     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2130 }
2131
2132 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, int bitmapType)
2133 {
2134     if (bitmap.Ok())
2135     {
2136         wxRichTextImageBlock imageBlock;
2137
2138         wxImage image = bitmap.ConvertToImage();
2139         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2140             return WriteImage(imageBlock);
2141     }
2142
2143     return false;
2144 }
2145
2146 /// Insert a newline (actually paragraph) at the current insertion point.
2147 bool wxRichTextCtrl::Newline()
2148 {
2149     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
2150 }
2151
2152 /// Insert a line break at the current insertion point.
2153 bool wxRichTextCtrl::LineBreak()
2154 {
2155     wxString text;
2156     text = wxRichTextLineBreakChar;
2157     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2158 }
2159
2160 // ----------------------------------------------------------------------------
2161 // Clipboard operations
2162 // ----------------------------------------------------------------------------
2163
2164 void wxRichTextCtrl::Copy()
2165 {
2166     if (CanCopy())
2167     {
2168         wxRichTextRange range = GetInternalSelectionRange();
2169         GetBuffer().CopyToClipboard(range);
2170     }
2171 }
2172
2173 void wxRichTextCtrl::Cut()
2174 {
2175     if (CanCut())
2176     {
2177         wxRichTextRange range = GetInternalSelectionRange();
2178         GetBuffer().CopyToClipboard(range);
2179
2180         DeleteSelectedContent();
2181         LayoutContent();
2182         Refresh(false);
2183     }
2184 }
2185
2186 void wxRichTextCtrl::Paste()
2187 {
2188     if (CanPaste())
2189     {
2190         BeginBatchUndo(_("Paste"));
2191
2192         long newPos = m_caretPosition;
2193         DeleteSelectedContent(& newPos);
2194
2195         GetBuffer().PasteFromClipboard(newPos);
2196
2197         EndBatchUndo();
2198     }
2199 }
2200
2201 void wxRichTextCtrl::DeleteSelection()
2202 {
2203     if (CanDeleteSelection())
2204     {
2205         DeleteSelectedContent();
2206     }
2207 }
2208
2209 bool wxRichTextCtrl::HasSelection() const
2210 {
2211     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2212 }
2213
2214 bool wxRichTextCtrl::CanCopy() const
2215 {
2216     // Can copy if there's a selection
2217     return HasSelection();
2218 }
2219
2220 bool wxRichTextCtrl::CanCut() const
2221 {
2222     return HasSelection() && IsEditable();
2223 }
2224
2225 bool wxRichTextCtrl::CanPaste() const
2226 {
2227     if ( !IsEditable() )
2228         return false;
2229
2230     return GetBuffer().CanPasteFromClipboard();
2231 }
2232
2233 bool wxRichTextCtrl::CanDeleteSelection() const
2234 {
2235     return HasSelection() && IsEditable();
2236 }
2237
2238
2239 // ----------------------------------------------------------------------------
2240 // Accessors
2241 // ----------------------------------------------------------------------------
2242
2243 void wxRichTextCtrl::SetEditable(bool editable)
2244 {
2245     m_editable = editable;
2246 }
2247
2248 void wxRichTextCtrl::SetInsertionPoint(long pos)
2249 {
2250     SelectNone();
2251
2252     m_caretPosition = pos - 1;
2253 }
2254
2255 void wxRichTextCtrl::SetInsertionPointEnd()
2256 {
2257     long pos = GetLastPosition();
2258     SetInsertionPoint(pos);
2259 }
2260
2261 long wxRichTextCtrl::GetInsertionPoint() const
2262 {
2263     return m_caretPosition+1;
2264 }
2265
2266 wxTextPos wxRichTextCtrl::GetLastPosition() const
2267 {
2268     return GetBuffer().GetRange().GetEnd();
2269 }
2270
2271 // If the return values from and to are the same, there is no
2272 // selection.
2273 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2274 {
2275     *from = m_selectionRange.GetStart();
2276     *to = m_selectionRange.GetEnd();
2277     if ((*to) != -1 && (*to) != -2)
2278         (*to) ++;
2279 }
2280
2281 bool wxRichTextCtrl::IsEditable() const
2282 {
2283     return m_editable;
2284 }
2285
2286 // ----------------------------------------------------------------------------
2287 // selection
2288 // ----------------------------------------------------------------------------
2289
2290 void wxRichTextCtrl::SetSelection(long from, long to)
2291 {
2292     // if from and to are both -1, it means (in wxWidgets) that all text should
2293     // be selected.
2294     if ( (from == -1) && (to == -1) )
2295     {
2296         from = 0;
2297         to = GetLastPosition()+1;
2298     }
2299
2300     DoSetSelection(from, to);
2301 }
2302
2303 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2304 {
2305     m_selectionAnchor = from;
2306     m_selectionRange.SetRange(from, to-1);
2307     if (from > -2)
2308         m_caretPosition = from-1;
2309
2310     Refresh(false);
2311     PositionCaret();
2312 }
2313
2314 // ----------------------------------------------------------------------------
2315 // Editing
2316 // ----------------------------------------------------------------------------
2317
2318 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2319                              const wxString& value)
2320 {
2321     BeginBatchUndo(_("Replace"));
2322
2323     DeleteSelectedContent();
2324
2325     DoWriteText(value, SetValue_SelectionOnly);
2326
2327     EndBatchUndo();
2328 }
2329
2330 void wxRichTextCtrl::Remove(long from, long to)
2331 {
2332     SelectNone();
2333
2334     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to), this);
2335
2336     LayoutContent();
2337     if (!IsFrozen())
2338         Refresh(false);
2339 }
2340
2341 bool wxRichTextCtrl::IsModified() const
2342 {
2343     return m_buffer.IsModified();
2344 }
2345
2346 void wxRichTextCtrl::MarkDirty()
2347 {
2348     m_buffer.Modify(true);
2349 }
2350
2351 void wxRichTextCtrl::DiscardEdits()
2352 {
2353     m_caretPositionForDefaultStyle = -2;
2354     m_buffer.Modify(false);
2355     m_buffer.GetCommandProcessor()->ClearCommands();
2356 }
2357
2358 int wxRichTextCtrl::GetNumberOfLines() const
2359 {
2360     return GetBuffer().GetParagraphCount();
2361 }
2362
2363 // ----------------------------------------------------------------------------
2364 // Positions <-> coords
2365 // ----------------------------------------------------------------------------
2366
2367 long wxRichTextCtrl::XYToPosition(long x, long y) const
2368 {
2369     return GetBuffer().XYToPosition(x, y);
2370 }
2371
2372 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2373 {
2374     return GetBuffer().PositionToXY(pos, x, y);
2375 }
2376
2377 // ----------------------------------------------------------------------------
2378 //
2379 // ----------------------------------------------------------------------------
2380
2381 void wxRichTextCtrl::ShowPosition(long pos)
2382 {
2383     if (!IsPositionVisible(pos))
2384         ScrollIntoView(pos-1, WXK_DOWN);
2385 }
2386
2387 int wxRichTextCtrl::GetLineLength(long lineNo) const
2388 {
2389     return GetBuffer().GetParagraphLength(lineNo);
2390 }
2391
2392 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2393 {
2394     return GetBuffer().GetParagraphText(lineNo);
2395 }
2396
2397 // ----------------------------------------------------------------------------
2398 // Undo/redo
2399 // ----------------------------------------------------------------------------
2400
2401 void wxRichTextCtrl::Undo()
2402 {
2403     if (CanUndo())
2404     {
2405         GetCommandProcessor()->Undo();
2406     }
2407 }
2408
2409 void wxRichTextCtrl::Redo()
2410 {
2411     if (CanRedo())
2412     {
2413         GetCommandProcessor()->Redo();
2414     }
2415 }
2416
2417 bool wxRichTextCtrl::CanUndo() const
2418 {
2419     return GetCommandProcessor()->CanUndo();
2420 }
2421
2422 bool wxRichTextCtrl::CanRedo() const
2423 {
2424     return GetCommandProcessor()->CanRedo();
2425 }
2426
2427 // ----------------------------------------------------------------------------
2428 // implementation details
2429 // ----------------------------------------------------------------------------
2430
2431 void wxRichTextCtrl::Command(wxCommandEvent& event)
2432 {
2433     SetValue(event.GetString());
2434     GetEventHandler()->ProcessEvent(event);
2435 }
2436
2437 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2438 {
2439     // By default, load the first file into the text window.
2440     if (event.GetNumberOfFiles() > 0)
2441     {
2442         LoadFile(event.GetFiles()[0]);
2443     }
2444 }
2445
2446 wxSize wxRichTextCtrl::DoGetBestSize() const
2447 {
2448     return wxSize(10, 10);
2449 }
2450
2451 // ----------------------------------------------------------------------------
2452 // standard handlers for standard edit menu events
2453 // ----------------------------------------------------------------------------
2454
2455 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2456 {
2457     Cut();
2458 }
2459
2460 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2461 {
2462     DeleteSelection();
2463 }
2464
2465 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2466 {
2467     Copy();
2468 }
2469
2470 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2471 {
2472     Paste();
2473 }
2474
2475 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2476 {
2477     Undo();
2478 }
2479
2480 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2481 {
2482     Redo();
2483 }
2484
2485 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2486 {
2487     event.Enable( CanCut() );
2488 }
2489
2490 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2491 {
2492     event.Enable( CanCopy() );
2493 }
2494
2495 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2496 {
2497     event.Enable( CanDeleteSelection() );
2498 }
2499
2500 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2501 {
2502     event.Enable( CanPaste() );
2503 }
2504
2505 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2506 {
2507     event.Enable( CanUndo() );
2508     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2509 }
2510
2511 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2512 {
2513     event.Enable( CanRedo() );
2514     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2515 }
2516
2517 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2518 {
2519     SelectAll();
2520 }
2521
2522 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2523 {
2524     event.Enable(GetLastPosition() > 0);
2525 }
2526
2527 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2528 {
2529     if (event.GetEventObject() != this)
2530     {
2531         event.Skip();
2532         return;
2533     }
2534
2535     if (!m_contextMenu)
2536     {
2537         m_contextMenu = new wxMenu;
2538         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2539         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2540         m_contextMenu->AppendSeparator();
2541         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2542         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2543         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2544         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2545         m_contextMenu->AppendSeparator();
2546         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2547     }
2548     PopupMenu(m_contextMenu);
2549     return;
2550 }
2551
2552 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2553 {
2554     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttr(style));
2555 }
2556
2557 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxTextAttr& style)
2558 {
2559     return GetBuffer().SetStyle(range.ToInternal(), style);
2560 }
2561
2562 // extended style setting operation with flags including:
2563 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2564 // see richtextbuffer.h for more details.
2565
2566 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttr& style, int flags)
2567 {
2568     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2569 }
2570
2571 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2572 {
2573     return GetBuffer().SetDefaultStyle(wxTextAttr(style));
2574 }
2575
2576 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2577 {
2578     return GetBuffer().GetDefaultStyle();
2579 }
2580
2581 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2582 {
2583     return GetBuffer().GetStyle(position, style);
2584 }
2585
2586 // get the common set of styles for the range
2587 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttr& style)
2588 {
2589     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2590 }
2591
2592 /// Get the content (uncombined) attributes for this position.
2593 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2594 {
2595     return GetBuffer().GetUncombinedStyle(position, style);
2596 }
2597
2598 /// Set font, and also the buffer attributes
2599 bool wxRichTextCtrl::SetFont(const wxFont& font)
2600 {
2601     wxControl::SetFont(font);
2602
2603     wxTextAttr attr = GetBuffer().GetAttributes();
2604     attr.SetFont(font);
2605     GetBuffer().SetBasicStyle(attr);
2606
2607     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2608     Refresh(false);
2609
2610     return true;
2611 }
2612
2613 /// Transform logical to physical
2614 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2615 {
2616     wxPoint pt;
2617     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2618
2619     return pt;
2620 }
2621
2622 /// Transform physical to logical
2623 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2624 {
2625     wxPoint pt;
2626     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2627
2628     return pt;
2629 }
2630
2631 /// Position the caret
2632 void wxRichTextCtrl::PositionCaret()
2633 {
2634     if (!GetCaret())
2635         return;
2636
2637     //wxLogDebug(wxT("PositionCaret"));
2638
2639     wxRect caretRect;
2640     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2641     {
2642         wxPoint newPt = caretRect.GetPosition();
2643         wxSize newSz = caretRect.GetSize();
2644         wxPoint pt = GetPhysicalPoint(newPt);
2645         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
2646         {
2647             GetCaret()->Move(pt);
2648             GetCaret()->SetSize(newSz);
2649         }
2650     }
2651 }
2652
2653 /// Get the caret height and position for the given character position
2654 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2655 {
2656     wxClientDC dc(this);
2657     dc.SetFont(GetFont());
2658
2659     PrepareDC(dc);
2660
2661     wxPoint pt;
2662     int height = 0;
2663
2664     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2665     {
2666         // Caret height can't be zero
2667         if (height == 0)
2668             height = dc.GetCharHeight();
2669
2670         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2671         return true;
2672     }
2673
2674     return false;
2675 }
2676
2677 /// Gets the line for the visible caret position. If the caret is
2678 /// shown at the very end of the line, it means the next character is actually
2679 /// on the following line. So let's get the line we're expecting to find
2680 /// if this is the case.
2681 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2682 {
2683     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2684     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2685     if (line)
2686     {
2687         wxRichTextRange lineRange = line->GetAbsoluteRange();
2688         if (caretPosition == lineRange.GetStart()-1 &&
2689             (para->GetRange().GetStart() != lineRange.GetStart()))
2690         {
2691             if (!m_caretAtLineStart)
2692                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2693         }
2694     }
2695     return line;
2696 }
2697
2698
2699 /// Move the caret to the given character position
2700 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2701 {
2702     if (GetBuffer().GetDirty())
2703         LayoutContent();
2704
2705     if (pos <= GetBuffer().GetRange().GetEnd())
2706     {
2707         SetCaretPosition(pos, showAtLineStart);
2708
2709         PositionCaret();
2710
2711         return true;
2712     }
2713     else
2714         return false;
2715 }
2716
2717 /// Layout the buffer: which we must do before certain operations, such as
2718 /// setting the caret position.
2719 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2720 {
2721     if (GetBuffer().GetDirty() || onlyVisibleRect)
2722     {
2723         wxRect availableSpace(GetClientSize());
2724         if (availableSpace.width == 0)
2725             availableSpace.width = 10;
2726         if (availableSpace.height == 0)
2727             availableSpace.height = 10;
2728
2729         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2730         if (onlyVisibleRect)
2731         {
2732             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2733             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2734         }
2735
2736         wxClientDC dc(this);
2737         dc.SetFont(GetFont());
2738
2739         PrepareDC(dc);
2740
2741         GetBuffer().Defragment();
2742         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2743         GetBuffer().Layout(dc, availableSpace, flags);
2744         GetBuffer().SetDirty(false);
2745
2746         if (!IsFrozen())
2747             SetupScrollbars();
2748     }
2749
2750     return true;
2751 }
2752
2753 /// Is all of the selection bold?
2754 bool wxRichTextCtrl::IsSelectionBold()
2755 {
2756     if (HasSelection())
2757     {
2758         wxTextAttr attr;
2759         wxRichTextRange range = GetSelectionRange();
2760         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2761         attr.SetFontWeight(wxBOLD);
2762
2763         return HasCharacterAttributes(range, attr);
2764     }
2765     else
2766     {
2767         // If no selection, then we need to combine current style with default style
2768         // to see what the effect would be if we started typing.
2769         wxTextAttr attr;
2770         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2771
2772         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2773         if (GetStyle(pos, attr))
2774         {
2775             if (IsDefaultStyleShowing())
2776                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2777             return attr.GetFontWeight() == wxBOLD;
2778         }
2779     }
2780     return false;
2781 }
2782
2783 /// Is all of the selection italics?
2784 bool wxRichTextCtrl::IsSelectionItalics()
2785 {
2786     if (HasSelection())
2787     {
2788         wxRichTextRange range = GetSelectionRange();
2789         wxTextAttr attr;
2790         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2791         attr.SetFontStyle(wxITALIC);
2792
2793         return HasCharacterAttributes(range, attr);
2794     }
2795     else
2796     {
2797         // If no selection, then we need to combine current style with default style
2798         // to see what the effect would be if we started typing.
2799         wxTextAttr attr;
2800         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2801
2802         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2803         if (GetStyle(pos, attr))
2804         {
2805             if (IsDefaultStyleShowing())
2806                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2807             return attr.GetFontStyle() == wxITALIC;
2808         }
2809     }
2810     return false;
2811 }
2812
2813 /// Is all of the selection underlined?
2814 bool wxRichTextCtrl::IsSelectionUnderlined()
2815 {
2816     if (HasSelection())
2817     {
2818         wxRichTextRange range = GetSelectionRange();
2819         wxTextAttr attr;
2820         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2821         attr.SetFontUnderlined(true);
2822
2823         return HasCharacterAttributes(range, attr);
2824     }
2825     else
2826     {
2827         // If no selection, then we need to combine current style with default style
2828         // to see what the effect would be if we started typing.
2829         wxTextAttr attr;
2830         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2831         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2832
2833         if (GetStyle(pos, attr))
2834         {
2835             if (IsDefaultStyleShowing())
2836                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2837             return attr.GetFontUnderlined();
2838         }
2839     }
2840     return false;
2841 }
2842
2843 /// Apply bold to the selection
2844 bool wxRichTextCtrl::ApplyBoldToSelection()
2845 {
2846     wxTextAttr attr;
2847     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2848     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
2849
2850     if (HasSelection())
2851         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2852     else
2853         SetAndShowDefaultStyle(attr);
2854     return true;
2855 }
2856
2857 /// Apply italic to the selection
2858 bool wxRichTextCtrl::ApplyItalicToSelection()
2859 {
2860     wxTextAttr attr;
2861     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2862     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
2863
2864     if (HasSelection())
2865         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2866     else
2867         SetAndShowDefaultStyle(attr);
2868     return true;
2869 }
2870
2871 /// Apply underline to the selection
2872 bool wxRichTextCtrl::ApplyUnderlineToSelection()
2873 {
2874     wxTextAttr attr;
2875     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2876     attr.SetFontUnderlined(!IsSelectionUnderlined());
2877
2878     if (HasSelection())
2879         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2880     else
2881         SetAndShowDefaultStyle(attr);
2882     return true;
2883 }
2884
2885 /// Is all of the selection aligned according to the specified flag?
2886 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
2887 {
2888     wxRichTextRange range;
2889     if (HasSelection())
2890         range = GetSelectionRange();
2891     else
2892         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
2893
2894     wxTextAttr attr;
2895     attr.SetAlignment(alignment);
2896
2897     return HasParagraphAttributes(range, attr);
2898 }
2899
2900 /// Apply alignment to the selection
2901 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
2902 {
2903     wxTextAttr attr;
2904     attr.SetAlignment(alignment);
2905     if (HasSelection())
2906         return SetStyle(GetSelectionRange(), attr);
2907     else
2908     {
2909         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
2910         if (para)
2911             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
2912     }
2913     return true;
2914 }
2915
2916 /// Apply a named style to the selection
2917 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
2918 {
2919     // Flags are defined within each definition, so only certain
2920     // attributes are applied.
2921     wxTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
2922
2923     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE;
2924
2925     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
2926     {
2927         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2928
2929         wxRichTextRange range;
2930
2931         if (HasSelection())
2932             range = GetSelectionRange();
2933         else
2934         {
2935             long pos = GetAdjustedCaretPosition(GetCaretPosition());
2936             range = wxRichTextRange(pos, pos+1);
2937         }
2938
2939         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
2940     }
2941
2942     // Make sure the attr has the style name
2943     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
2944     {
2945         attr.SetParagraphStyleName(def->GetName());
2946
2947         // If applying a paragraph style, we only want the paragraph nodes to adopt these
2948         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
2949         // to change its style independently.
2950         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2951     }
2952     else
2953         attr.SetCharacterStyleName(def->GetName());
2954
2955     if (HasSelection())
2956         return SetStyleEx(GetSelectionRange(), attr, flags);
2957     else
2958     {
2959         SetAndShowDefaultStyle(attr);
2960         return true;
2961     }
2962 }
2963
2964 /// Apply the style sheet to the buffer, for example if the styles have changed.
2965 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
2966 {
2967     if (!styleSheet)
2968         styleSheet = GetBuffer().GetStyleSheet();
2969     if (!styleSheet)
2970         return false;
2971
2972     if (GetBuffer().ApplyStyleSheet(styleSheet))
2973     {
2974         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2975         Refresh(false);
2976         return true;
2977     }
2978     else
2979         return false;
2980 }
2981
2982 /// Sets the default style to the style under the cursor
2983 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
2984 {
2985     wxTextAttr attr;
2986     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
2987
2988     // If at the start of a paragraph, use the next position.
2989     long pos = GetAdjustedCaretPosition(GetCaretPosition());
2990
2991     if (GetUncombinedStyle(pos, attr))
2992     {
2993         SetDefaultStyle(attr);
2994         return true;
2995     }
2996
2997     return false;
2998 }
2999
3000 /// Returns the first visible position in the current view
3001 long wxRichTextCtrl::GetFirstVisiblePosition() const
3002 {
3003     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3004     if (line)
3005         return line->GetAbsoluteRange().GetStart();
3006     else
3007         return 0;
3008 }
3009
3010 /// Get the first visible point in the window
3011 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3012 {
3013     int ppuX, ppuY;
3014     int startXUnits, startYUnits;
3015
3016     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3017     GetViewStart(& startXUnits, & startYUnits);
3018
3019     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3020 }
3021
3022 /// The adjusted caret position is the character position adjusted to take
3023 /// into account whether we're at the start of a paragraph, in which case
3024 /// style information should be taken from the next position, not current one.
3025 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3026 {
3027     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3028
3029     if (para && (caretPos+1 == para->GetRange().GetStart()))
3030         caretPos ++;
3031     return caretPos;
3032 }
3033
3034 /// Get/set the selection range in character positions. -1, -1 means no selection.
3035 /// The range is in API convention, i.e. a single character selection is denoted
3036 /// by (n, n+1)
3037 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3038 {
3039     wxRichTextRange range = GetInternalSelectionRange();
3040     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3041         range.SetEnd(range.GetEnd() + 1);
3042     return range;
3043 }
3044
3045 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3046 {
3047     wxRichTextRange range1(range);
3048     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3049         range1.SetEnd(range1.GetEnd() - 1);
3050
3051     wxASSERT( range1.GetStart() > range1.GetEnd() );
3052
3053     SetInternalSelectionRange(range1);
3054 }
3055
3056 /// Set list style
3057 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3058 {
3059     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3060 }
3061
3062 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3063 {
3064     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3065 }
3066
3067 /// Clear list for given range
3068 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3069 {
3070     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3071 }
3072
3073 /// Number/renumber any list elements in the given range
3074 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3075 {
3076     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3077 }
3078
3079 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3080 {
3081     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3082 }
3083
3084 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3085 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3086 {
3087     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3088 }
3089
3090 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3091 {
3092     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3093 }
3094
3095 /// Deletes the content in the given range
3096 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3097 {
3098     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3099 }
3100
3101 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3102 {
3103     if (sm_availableFontNames.GetCount() == 0)
3104     {
3105         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3106         sm_availableFontNames.Sort();
3107     }
3108     return sm_availableFontNames;
3109 }
3110
3111 void wxRichTextCtrl::ClearAvailableFontNames()
3112 {
3113     sm_availableFontNames.Clear();
3114 }
3115
3116 void wxRichTextCtrl::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
3117 {
3118     //wxLogDebug(wxT("wxRichTextCtrl::OnSysColourChanged"));
3119
3120     wxTextAttrEx basicStyle = GetBasicStyle();
3121     basicStyle.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
3122     SetBasicStyle(basicStyle);
3123     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
3124
3125     Refresh();
3126 }
3127
3128 #endif
3129     // wxUSE_RICHTEXT