src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richeditctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/textfile.h"
  30 #include "wx/ffile.h"
  31 #include "wx/filename.h"
  32 #include "wx/dcbuffer.h"
  33 #include "wx/arrimpl.cpp"
  34 #include "wx/fontenum.h"
  35
  36 // DLL options compatibility check:
  37 #include "wx/app.h"
  38 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  39
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_CLICK)
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RETURN)
  45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CHARACTER)
  46 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_DELETE)
  47
  48 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING)
  49 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED)
  50 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING)
  51 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED)
  52
  53 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED)
  54 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED)
  55 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED)
  56 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED)
  57
  58 IMPLEMENT_CLASS( wxRichTextCtrl, wxControl )
  59
  60 IMPLEMENT_CLASS( wxRichTextEvent, wxNotifyEvent )
  61
  62 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
  63     EVT_PAINT(wxRichTextCtrl::OnPaint)
  64     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
  65     EVT_IDLE(wxRichTextCtrl::OnIdle)
  66     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
  67     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
  68     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
  69     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
  70     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
  71     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
  72     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
  73     EVT_CHAR(wxRichTextCtrl::OnChar)
  74     EVT_SIZE(wxRichTextCtrl::OnSize)
  75     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
  76     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
  77     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
  78     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
  79
  80     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
  81     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
  82
  83     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
  84     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
  85
  86     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
  87     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
  88
  89     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
  90     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
  91
  92     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
  93     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
  94
  95     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
  96     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
  97
  98     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
  99     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 100 END_EVENT_TABLE()
 101
 102 /*!
 103  * wxRichTextCtrl
 104  */
 105
 106 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 107
 108 wxRichTextCtrl::wxRichTextCtrl()
 109               : wxScrollHelper(this)
 110 {
 111     Init();
 112 }
 113
 114 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 115                                wxWindowID id,
 116                                const wxString& value,
 117                                const wxPoint& pos,
 118                                const wxSize& size,
 119                                long style,
 120                                const wxValidator& validator,
 121                                const wxString& name)
 122               : wxScrollHelper(this)
 123 {
 124     Init();
 125     Create(parent, id, value, pos, size, style, validator, name);
 126 }
 127
 128 /// Creation
 129 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 130                              const wxValidator& validator, const wxString& name)
 131 {
 132     if (!wxControl::Create(parent, id, pos, size,
 133                            style|wxFULL_REPAINT_ON_RESIZE,
 134                            validator, name))
 135         return false;
 136
 137     if (!GetFont().Ok())
 138     {
 139         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 140     }
 141
 142     GetBuffer().Reset();
 143     GetBuffer().SetRichTextCtrl(this);
 144
 145     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 146     GetCaret()->Show();
 147
 148     if (style & wxTE_READONLY)
 149         SetEditable(false);
 150
 151     // The base attributes must all have default values
 152     wxTextAttrEx attributes;
 153     attributes.SetFont(GetFont());
 154     attributes.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
 155     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 156     attributes.SetLineSpacing(10);
 157     attributes.SetParagraphSpacingAfter(10);
 158     attributes.SetParagraphSpacingBefore(0);
 159     attributes.SetTextEffects(0);
 160     attributes.SetTextEffectFlags(wxTEXT_ATTR_EFFECT_STRIKETHROUGH|wxTEXT_ATTR_EFFECT_CAPITALS);
 161
 162     SetBasicStyle(attributes);
 163
 164     // The default attributes will be merged with base attributes, so
 165     // can be empty to begin with
 166     wxTextAttrEx defaultAttributes;
 167     SetDefaultStyle(defaultAttributes);
 168
 169     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 170     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 171
 172     // Tell the sizers to use the given or best size
 173     SetInitialSize(size);
 174
 175 #if wxRICHTEXT_BUFFERED_PAINTING
 176     // Create a buffer
 177     RecreateBuffer(size);
 178 #endif
 179
 180     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 181     m_urlCursor = wxCursor(wxCURSOR_HAND);
 182
 183     SetCursor(m_textCursor);
 184
 185     if (!value.IsEmpty())
 186         SetValue(value);
 187
 188     GetBuffer().AddEventHandler(this);
 189
 190     return true;
 191 }
 192
 193 wxRichTextCtrl::~wxRichTextCtrl()
 194 {
 195     GetBuffer().RemoveEventHandler(this);
 196
 197     delete m_contextMenu;
 198 }
 199
 200 /// Member initialisation
 201 void wxRichTextCtrl::Init()
 202 {
 203     m_freezeCount = 0;
 204     m_contextMenu = NULL;
 205     m_caret = NULL;
 206     m_caretPosition = -1;
 207     m_selectionRange.SetRange(-2, -2);
 208     m_selectionAnchor = -2;
 209     m_editable = true;
 210     m_caretAtLineStart = false;
 211     m_dragging = false;
 212     m_fullLayoutRequired = false;
 213     m_fullLayoutTime = 0;
 214     m_fullLayoutSavedPosition = 0;
 215     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 216     m_caretPositionForDefaultStyle = -2;
 217 }
 218
 219 /// Call Freeze to prevent refresh
 220 void wxRichTextCtrl::Freeze()
 221 {
 222     m_freezeCount ++;
 223 }
 224
 225 /// Call Thaw to refresh
 226 void wxRichTextCtrl::Thaw()
 227 {
 228     m_freezeCount --;
 229
 230     if (m_freezeCount == 0)
 231     {
 232         if (GetBuffer().GetDirty())
 233             LayoutContent();
 234         else
 235             SetupScrollbars();
 236         Refresh(false);
 237     }
 238 }
 239
 240 /// Clear all text
 241 void wxRichTextCtrl::Clear()
 242 {
 243     m_buffer.ResetAndClearCommands();
 244     m_buffer.SetDirty(true);
 245     m_caretPosition = -1;
 246     m_caretPositionForDefaultStyle = -2;
 247     m_caretAtLineStart = false;
 248     m_selectionRange.SetRange(-2, -2);
 249
 250     if (m_freezeCount == 0)
 251     {
 252         LayoutContent();
 253         Refresh(false);
 254     }
 255
 256     wxTextCtrl::SendTextUpdatedEvent(this);
 257 }
 258
 259 /// Painting
 260 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 261 {
 262     if (GetCaret() && GetCaret()->IsVisible())
 263         GetCaret()->Hide();
 264
 265     {
 266 #if wxRICHTEXT_BUFFERED_PAINTING
 267         wxBufferedPaintDC dc(this, m_bufferBitmap);
 268 #else
 269         wxPaintDC dc(this);
 270 #endif
 271         PrepareDC(dc);
 272
 273         if (m_freezeCount > 0)
 274             return;
 275
 276         dc.SetFont(GetFont());
 277
 278         // Paint the background
 279         PaintBackground(dc);
 280
 281         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 282
 283         wxRect drawingArea(GetUpdateRegion().GetBox());
 284         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 285
 286         wxRect availableSpace(GetClientSize());
 287         if (GetBuffer().GetDirty())
 288         {
 289             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 290             GetBuffer().SetDirty(false);
 291             SetupScrollbars();
 292         }
 293
 294         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 295     }
 296
 297     if (GetCaret() && !GetCaret()->IsVisible())
 298         GetCaret()->Show();
 299
 300     PositionCaret();
 301 }
 302
 303 // Empty implementation, to prevent flicker
 304 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 305 {
 306 }
 307
 308 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 309 {
 310     if (GetCaret())
 311     {
 312         if (!GetCaret()->IsVisible())
 313             GetCaret()->Show();
 314         PositionCaret();
 315     }
 316
 317     // if (!IsFrozen())
 318     //    Refresh(false);
 319 }
 320
 321 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 322 {
 323     if (GetCaret() && GetCaret()->IsVisible())
 324         GetCaret()->Hide();
 325
 326     // if (!IsFrozen())
 327     //    Refresh(false);
 328 }
 329
 330 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 331 {
 332     m_dragging = false;
 333 }
 334
 335 /// Left-click
 336 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 337 {
 338     SetFocus();
 339
 340     wxClientDC dc(this);
 341     PrepareDC(dc);
 342     dc.SetFont(GetFont());
 343
 344     long position = 0;
 345     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 346
 347     if (hit != wxRICHTEXT_HITTEST_NONE)
 348     {
 349         m_dragStart = event.GetLogicalPosition(dc);
 350         m_dragging = true;
 351         CaptureMouse();
 352
 353         SelectNone();
 354
 355         bool caretAtLineStart = false;
 356
 357         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 358         {
 359             // If we're at the start of a line (but not first in para)
 360             // then we should keep the caret showing at the start of the line
 361             // by showing the m_caretAtLineStart flag.
 362             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 363             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 364
 365             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 366                 caretAtLineStart = true;
 367             position --;
 368         }
 369
 370         MoveCaret(position, caretAtLineStart);
 371         SetDefaultStyleToCursorStyle();
 372     }
 373
 374     event.Skip();
 375 }
 376
 377 /// Left-up
 378 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 379 {
 380     if (m_dragging)
 381     {
 382         m_dragging = false;
 383         if (GetCapture() == this)
 384             ReleaseMouse();
 385
 386         // See if we clicked on a URL
 387         wxClientDC dc(this);
 388         PrepareDC(dc);
 389         dc.SetFont(GetFont());
 390
 391         long position = 0;
 392         wxPoint logicalPt = event.GetLogicalPosition(dc);
 393         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 394
 395         if (hit != wxRICHTEXT_HITTEST_NONE)
 396         {
 397             wxRichTextEvent cmdEvent(
 398                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 399                 GetId());
 400             cmdEvent.SetEventObject(this);
 401             cmdEvent.SetPosition(m_caretPosition+1);
 402
 403             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 404             {
 405                 wxTextAttrEx attr;
 406                 if (GetStyle(position, attr))
 407                 {
 408                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 409                     {
 410                         wxString urlTarget = attr.GetURL();
 411                         if (!urlTarget.IsEmpty())
 412                         {
 413                             wxMouseEvent mouseEvent(event);
 414
 415                             long startPos = 0, endPos = 0;
 416                             wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 417                             if (obj)
 418                             {
 419                                 startPos = obj->GetRange().GetStart();
 420                                 endPos = obj->GetRange().GetEnd();
 421                             }
 422
 423                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 424                             InitCommandEvent(urlEvent);
 425
 426                             urlEvent.SetString(urlTarget);
 427
 428                             GetEventHandler()->ProcessEvent(urlEvent);
 429                         }
 430                     }
 431                 }
 432             }
 433         }
 434     }
 435 }
 436
 437 /// Left-click
 438 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 439 {
 440     wxClientDC dc(this);
 441     PrepareDC(dc);
 442     dc.SetFont(GetFont());
 443
 444     long position = 0;
 445     wxPoint logicalPt = event.GetLogicalPosition(dc);
 446     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 447
 448     // See if we need to change the cursor
 449
 450     {
 451         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 452         {
 453             wxTextAttrEx attr;
 454             if (GetStyle(position, attr))
 455             {
 456                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 457                 {
 458                     SetCursor(m_urlCursor);
 459                 }
 460                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 461                 {
 462                     SetCursor(m_textCursor);
 463                 }
 464             }
 465         }
 466         else
 467             SetCursor(m_textCursor);
 468     }
 469
 470     if (!event.Dragging())
 471     {
 472         event.Skip();
 473         return;
 474     }
 475
 476     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 477     {
 478         // TODO: test closeness
 479
 480         bool caretAtLineStart = false;
 481
 482         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 483         {
 484             // If we're at the start of a line (but not first in para)
 485             // then we should keep the caret showing at the start of the line
 486             // by showing the m_caretAtLineStart flag.
 487             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 488             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 489
 490             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 491                 caretAtLineStart = true;
 492             position --;
 493         }
 494
 495         if (m_caretPosition != position)
 496         {
 497             bool extendSel = ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 498
 499             MoveCaret(position, caretAtLineStart);
 500             SetDefaultStyleToCursorStyle();
 501
 502             if (extendSel)
 503                 Refresh(false);
 504         }
 505     }
 506 }
 507
 508 /// Right-click
 509 void wxRichTextCtrl::OnRightClick(wxMouseEvent& WXUNUSED(event))
 510 {
 511     SetFocus();
 512
 513     wxRichTextEvent cmdEvent(
 514         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 515         GetId());
 516     cmdEvent.SetEventObject(this);
 517     cmdEvent.SetPosition(m_caretPosition+1);
 518
 519     GetEventHandler()->ProcessEvent(cmdEvent);
 520 }
 521
 522 /// Left-double-click
 523 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 524 {
 525     wxRichTextEvent cmdEvent(
 526         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
 527         GetId());
 528     cmdEvent.SetEventObject(this);
 529     cmdEvent.SetPosition(m_caretPosition+1);
 530
 531     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 532     {
 533         SelectWord(GetCaretPosition()+1);
 534     }
 535 }
 536
 537 /// Middle-click
 538 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 539 {
 540     wxRichTextEvent cmdEvent(
 541         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
 542         GetId());
 543     cmdEvent.SetEventObject(this);
 544     cmdEvent.SetPosition(m_caretPosition+1);
 545
 546     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 547         event.Skip();
 548 }
 549
 550 /// Key press
 551 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 552 {
 553     int flags = 0;
 554     if (event.CmdDown())
 555         flags |= wxRICHTEXT_CTRL_DOWN;
 556     if (event.ShiftDown())
 557         flags |= wxRICHTEXT_SHIFT_DOWN;
 558     if (event.AltDown())
 559         flags |= wxRICHTEXT_ALT_DOWN;
 560
 561     if (event.GetKeyCode() == WXK_LEFT ||
 562         event.GetKeyCode() == WXK_RIGHT ||
 563         event.GetKeyCode() == WXK_UP ||
 564         event.GetKeyCode() == WXK_DOWN ||
 565         event.GetKeyCode() == WXK_HOME ||
 566         event.GetKeyCode() == WXK_PAGEUP ||
 567         event.GetKeyCode() == WXK_PAGEDOWN ||
 568         event.GetKeyCode() == WXK_END ||
 569
 570         event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 571         event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 572         event.GetKeyCode() == WXK_NUMPAD_UP ||
 573         event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 574         event.GetKeyCode() == WXK_NUMPAD_HOME ||
 575         event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 576         event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 577         event.GetKeyCode() == WXK_NUMPAD_END)
 578     {
 579         KeyboardNavigate(event.GetKeyCode(), flags);
 580         return;
 581     }
 582
 583     // all the other keys modify the controls contents which shouldn't be
 584     // possible if we're read-only
 585     if ( !IsEditable() )
 586     {
 587         event.Skip();
 588         return;
 589     }
 590
 591     if (event.GetKeyCode() == WXK_RETURN)
 592     {
 593         BeginBatchUndo(_("Insert Text"));
 594
 595         long newPos = m_caretPosition;
 596
 597         DeleteSelectedContent(& newPos);
 598
 599         if (event.ShiftDown())
 600         {
 601             wxString text;
 602             text = wxRichTextLineBreakChar;
 603             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 604         }
 605         else
 606             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
 607
 608         EndBatchUndo();
 609         SetDefaultStyleToCursorStyle();
 610
 611         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 612
 613         wxRichTextEvent cmdEvent(
 614             wxEVT_COMMAND_RICHTEXT_RETURN,
 615             GetId());
 616         cmdEvent.SetEventObject(this);
 617         cmdEvent.SetFlags(flags);
 618         cmdEvent.SetPosition(newPos+1);
 619
 620         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 621         {
 622             // Generate conventional event
 623             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 624             InitCommandEvent(textEvent);
 625
 626             GetEventHandler()->ProcessEvent(textEvent);
 627         }
 628         Update();
 629     }
 630     else if (event.GetKeyCode() == WXK_BACK)
 631     {
 632         BeginBatchUndo(_("Delete Text"));
 633
 634         // Submit range in character positions, which are greater than caret positions,
 635         // so subtract 1 for deleted character and add 1 for conversion to character position.
 636         if (m_caretPosition > -1 && !HasSelection())
 637         {
 638             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition, m_caretPosition), this);
 639         }
 640         else
 641             DeleteSelectedContent();
 642
 643         EndBatchUndo();
 644
 645         if (GetLastPosition() == -1)
 646         {
 647             GetBuffer().Reset();
 648
 649             m_caretPosition = -1;
 650             PositionCaret();
 651             SetDefaultStyleToCursorStyle();
 652         }
 653
 654         ScrollIntoView(m_caretPosition, WXK_LEFT);
 655
 656         wxRichTextEvent cmdEvent(
 657             wxEVT_COMMAND_RICHTEXT_DELETE,
 658             GetId());
 659         cmdEvent.SetEventObject(this);
 660         cmdEvent.SetFlags(flags);
 661         cmdEvent.SetPosition(m_caretPosition+1);
 662         GetEventHandler()->ProcessEvent(cmdEvent);
 663
 664         Update();
 665     }
 666     else if (event.GetKeyCode() == WXK_DELETE)
 667     {
 668         BeginBatchUndo(_("Delete Text"));
 669
 670         // Submit range in character positions, which are greater than caret positions,
 671         if (m_caretPosition < GetBuffer().GetRange().GetEnd()+1 && !HasSelection())
 672         {
 673             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition+1, m_caretPosition+1), this);
 674         }
 675         else
 676             DeleteSelectedContent();
 677
 678         EndBatchUndo();
 679
 680         if (GetLastPosition() == -1)
 681         {
 682             GetBuffer().Reset();
 683
 684             m_caretPosition = -1;
 685             PositionCaret();
 686             SetDefaultStyleToCursorStyle();
 687         }
 688
 689         wxRichTextEvent cmdEvent(
 690             wxEVT_COMMAND_RICHTEXT_DELETE,
 691             GetId());
 692         cmdEvent.SetEventObject(this);
 693         cmdEvent.SetFlags(flags);
 694         cmdEvent.SetPosition(m_caretPosition+1);
 695         GetEventHandler()->ProcessEvent(cmdEvent);
 696
 697         Update();
 698     }
 699     else
 700     {
 701         long keycode = event.GetKeyCode();
 702         switch ( keycode )
 703         {
 704             case WXK_ESCAPE:
 705             case WXK_DELETE:
 706             case WXK_START:
 707             case WXK_LBUTTON:
 708             case WXK_RBUTTON:
 709             case WXK_CANCEL:
 710             case WXK_MBUTTON:
 711             case WXK_CLEAR:
 712             case WXK_SHIFT:
 713             case WXK_ALT:
 714             case WXK_CONTROL:
 715             case WXK_MENU:
 716             case WXK_PAUSE:
 717             case WXK_CAPITAL:
 718             case WXK_END:
 719             case WXK_HOME:
 720             case WXK_LEFT:
 721             case WXK_UP:
 722             case WXK_RIGHT:
 723             case WXK_DOWN:
 724             case WXK_SELECT:
 725             case WXK_PRINT:
 726             case WXK_EXECUTE:
 727             case WXK_SNAPSHOT:
 728             case WXK_INSERT:
 729             case WXK_HELP:
 730             case WXK_NUMPAD0:
 731             case WXK_NUMPAD1:
 732             case WXK_NUMPAD2:
 733             case WXK_NUMPAD3:
 734             case WXK_NUMPAD4:
 735             case WXK_NUMPAD5:
 736             case WXK_NUMPAD6:
 737             case WXK_NUMPAD7:
 738             case WXK_NUMPAD8:
 739             case WXK_NUMPAD9:
 740             case WXK_MULTIPLY:
 741             case WXK_ADD:
 742             case WXK_SEPARATOR:
 743             case WXK_SUBTRACT:
 744             case WXK_DECIMAL:
 745             case WXK_DIVIDE:
 746             case WXK_F1:
 747             case WXK_F2:
 748             case WXK_F3:
 749             case WXK_F4:
 750             case WXK_F5:
 751             case WXK_F6:
 752             case WXK_F7:
 753             case WXK_F8:
 754             case WXK_F9:
 755             case WXK_F10:
 756             case WXK_F11:
 757             case WXK_F12:
 758             case WXK_F13:
 759             case WXK_F14:
 760             case WXK_F15:
 761             case WXK_F16:
 762             case WXK_F17:
 763             case WXK_F18:
 764             case WXK_F19:
 765             case WXK_F20:
 766             case WXK_F21:
 767             case WXK_F22:
 768             case WXK_F23:
 769             case WXK_F24:
 770             case WXK_NUMLOCK:
 771             case WXK_SCROLL:
 772             case WXK_PAGEUP:
 773             case WXK_PAGEDOWN:
 774             case WXK_NUMPAD_SPACE:
 775             case WXK_NUMPAD_TAB:
 776             case WXK_NUMPAD_ENTER:
 777             case WXK_NUMPAD_F1:
 778             case WXK_NUMPAD_F2:
 779             case WXK_NUMPAD_F3:
 780             case WXK_NUMPAD_F4:
 781             case WXK_NUMPAD_HOME:
 782             case WXK_NUMPAD_LEFT:
 783             case WXK_NUMPAD_UP:
 784             case WXK_NUMPAD_RIGHT:
 785             case WXK_NUMPAD_DOWN:
 786             case WXK_NUMPAD_PAGEUP:
 787             case WXK_NUMPAD_PAGEDOWN:
 788             case WXK_NUMPAD_END:
 789             case WXK_NUMPAD_BEGIN:
 790             case WXK_NUMPAD_INSERT:
 791             case WXK_NUMPAD_DELETE:
 792             case WXK_NUMPAD_EQUAL:
 793             case WXK_NUMPAD_MULTIPLY:
 794             case WXK_NUMPAD_ADD:
 795             case WXK_NUMPAD_SEPARATOR:
 796             case WXK_NUMPAD_SUBTRACT:
 797             case WXK_NUMPAD_DECIMAL:
 798             case WXK_WINDOWS_LEFT:
 799             {
 800                 event.Skip();
 801                 return;
 802             }
 803
 804             default:
 805             {
 806                 if (event.CmdDown() || event.AltDown())
 807                 {
 808                     event.Skip();
 809                     return;
 810                 }
 811
 812                 wxRichTextEvent cmdEvent(
 813                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
 814                     GetId());
 815                 cmdEvent.SetEventObject(this);
 816                 cmdEvent.SetFlags(flags);
 817 #if wxUSE_UNICODE
 818                 cmdEvent.SetCharacter(event.GetUnicodeKey());
 819 #else
 820                 cmdEvent.SetCharacter((wxChar) keycode);
 821 #endif
 822                 cmdEvent.SetPosition(m_caretPosition+1);
 823
 824                 if (keycode == wxT('\t'))
 825                 {
 826                     // See if we need to promote or demote the selection or paragraph at the cursor
 827                     // position, instead of inserting a tab.
 828                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
 829                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
 830                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
 831                     {
 832                         wxRichTextRange range;
 833                         if (HasSelection())
 834                             range = GetSelectionRange();
 835                         else
 836                             range = para->GetRange().FromInternal();
 837
 838                         int promoteBy = event.ShiftDown() ? 1 : -1;
 839
 840                         PromoteList(promoteBy, range, NULL);
 841
 842                         GetEventHandler()->ProcessEvent(cmdEvent);
 843
 844                         return;
 845                     }
 846                 }
 847
 848                 BeginBatchUndo(_("Insert Text"));
 849
 850                 long newPos = m_caretPosition;
 851                 DeleteSelectedContent(& newPos);
 852
 853 #if wxUSE_UNICODE
 854                 wxString str = event.GetUnicodeKey();
 855 #else
 856                 wxString str = (wxChar) event.GetKeyCode();
 857 #endif
 858                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
 859
 860                 EndBatchUndo();
 861
 862                 SetDefaultStyleToCursorStyle();
 863                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
 864
 865                 GetEventHandler()->ProcessEvent(cmdEvent);
 866
 867                 Update();
 868             }
 869         }
 870     }
 871 }
 872
 873 /// Delete content if there is a selection, e.g. when pressing a key.
 874 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
 875 {
 876     if (HasSelection())
 877     {
 878         long pos = m_selectionRange.GetStart();
 879         GetBuffer().DeleteRangeWithUndo(m_selectionRange, this);
 880         m_selectionRange.SetRange(-2, -2);
 881
 882         if (newPos)
 883             *newPos = pos-1;
 884         return true;
 885     }
 886     else
 887         return false;
 888 }
 889
 890 /// Keyboard navigation
 891
 892 /*
 893
 894 Left:       left one character
 895 Right:      right one character
 896 Up:         up one line
 897 Down:       down one line
 898 Ctrl-Left:  left one word
 899 Ctrl-Right: right one word
 900 Ctrl-Up:    previous paragraph start
 901 Ctrl-Down:  next start of paragraph
 902 Home:       start of line
 903 End:        end of line
 904 Ctrl-Home:  start of document
 905 Ctrl-End:   end of document
 906 Page-Up:    Up a screen
 907 Page-Down:  Down a screen
 908
 909 Maybe:
 910
 911 Ctrl-Alt-PgUp: Start of window
 912 Ctrl-Alt-PgDn: End of window
 913 F8:         Start selection mode
 914 Esc:        End selection mode
 915
 916 Adding Shift does the above but starts/extends selection.
 917
 918
 919  */
 920
 921 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
 922 {
 923     bool success = false;
 924
 925     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
 926     {
 927         if (flags & wxRICHTEXT_CTRL_DOWN)
 928             success = WordRight(1, flags);
 929         else
 930             success = MoveRight(1, flags);
 931     }
 932     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
 933     {
 934         if (flags & wxRICHTEXT_CTRL_DOWN)
 935             success = WordLeft(1, flags);
 936         else
 937             success = MoveLeft(1, flags);
 938     }
 939     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
 940     {
 941         if (flags & wxRICHTEXT_CTRL_DOWN)
 942             success = MoveToParagraphStart(flags);
 943         else
 944             success = MoveUp(1, flags);
 945     }
 946     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
 947     {
 948         if (flags & wxRICHTEXT_CTRL_DOWN)
 949             success = MoveToParagraphEnd(flags);
 950         else
 951             success = MoveDown(1, flags);
 952     }
 953     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
 954     {
 955         success = PageUp(1, flags);
 956     }
 957     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
 958     {
 959         success = PageDown(1, flags);
 960     }
 961     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
 962     {
 963         if (flags & wxRICHTEXT_CTRL_DOWN)
 964             success = MoveHome(flags);
 965         else
 966             success = MoveToLineStart(flags);
 967     }
 968     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
 969     {
 970         if (flags & wxRICHTEXT_CTRL_DOWN)
 971             success = MoveEnd(flags);
 972         else
 973             success = MoveToLineEnd(flags);
 974     }
 975
 976     if (success)
 977     {
 978         ScrollIntoView(m_caretPosition, keyCode);
 979         SetDefaultStyleToCursorStyle();
 980     }
 981
 982     return success;
 983 }
 984
 985 /// Extend the selection. Selections are in caret positions.
 986 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
 987 {
 988     if (flags & wxRICHTEXT_SHIFT_DOWN)
 989     {
 990         // If not currently selecting, start selecting
 991         if (m_selectionRange.GetStart() == -2)
 992         {
 993             m_selectionAnchor = oldPos;
 994
 995             if (oldPos > newPos)
 996                 m_selectionRange.SetRange(newPos+1, oldPos);
 997             else
 998                 m_selectionRange.SetRange(oldPos+1, newPos);
 999         }
1000         else
1001         {
1002             // Always ensure that the selection range start is greater than
1003             // the end.
1004             if (newPos > m_selectionAnchor)
1005                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
1006             else
1007                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
1008         }
1009
1010         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
1011         {
1012             wxLogDebug(wxT("Strange selection range"));
1013         }
1014
1015         return true;
1016     }
1017     else
1018         return false;
1019 }
1020
1021 /// Scroll into view, returning true if we scrolled.
1022 /// This takes a _caret_ position.
1023 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1024 {
1025     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1026
1027     if (!line)
1028         return false;
1029
1030     int ppuX, ppuY;
1031     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1032
1033     int startXUnits, startYUnits;
1034     GetViewStart(& startXUnits, & startYUnits);
1035     int startY = startYUnits * ppuY;
1036
1037     int sx = 0, sy = 0;
1038     GetVirtualSize(& sx, & sy);
1039     int sxUnits = 0;
1040     int syUnits = 0;
1041     if (ppuY != 0)
1042         syUnits = sy/ppuY;
1043
1044     wxRect rect = line->GetRect();
1045
1046     bool scrolled = false;
1047
1048     wxSize clientSize = GetClientSize();
1049
1050     // Going down
1051     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1052         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1053         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1054         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1055     {
1056         if ((rect.y + rect.height) > (clientSize.y + startY))
1057         {
1058             // Make it scroll so this item is at the bottom
1059             // of the window
1060             int y = rect.y - (clientSize.y - rect.height);
1061             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1062
1063             // If we're still off the screen, scroll another line down
1064             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1065                 yUnits ++;
1066
1067             if (startYUnits != yUnits)
1068             {
1069                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1070                 scrolled = true;
1071             }
1072         }
1073         else if (rect.y < startY)
1074         {
1075             // Make it scroll so this item is at the top
1076             // of the window
1077             int y = rect.y ;
1078             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1079
1080             if (startYUnits != yUnits)
1081             {
1082                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1083                 scrolled = true;
1084             }
1085         }
1086     }
1087     // Going up
1088     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1089              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1090              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1091              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1092     {
1093         if (rect.y < startY)
1094         {
1095             // Make it scroll so this item is at the top
1096             // of the window
1097             int y = rect.y ;
1098             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1099
1100             if (startYUnits != yUnits)
1101             {
1102                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1103                 scrolled = true;
1104             }
1105         }
1106         else if ((rect.y + rect.height) > (clientSize.y + startY))
1107         {
1108             // Make it scroll so this item is at the bottom
1109             // of the window
1110             int y = rect.y - (clientSize.y - rect.height);
1111             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1112
1113             // If we're still off the screen, scroll another line down
1114             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1115                 yUnits ++;
1116
1117             if (startYUnits != yUnits)
1118             {
1119                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1120                 scrolled = true;
1121             }
1122         }
1123     }
1124     PositionCaret();
1125
1126     return scrolled;
1127 }
1128
1129 /// Is the given position visible on the screen?
1130 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1131 {
1132     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1133
1134     if (!line)
1135         return false;
1136
1137     int ppuX, ppuY;
1138     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1139
1140     int startX, startY;
1141     GetViewStart(& startX, & startY);
1142     startX = 0;
1143     startY = startY * ppuY;
1144
1145     int sx = 0, sy = 0;
1146     GetVirtualSize(& sx, & sy);
1147     sx = 0;
1148     if (ppuY != 0)
1149         sy = sy/ppuY;
1150
1151     wxRect rect = line->GetRect();
1152
1153     wxSize clientSize = GetClientSize();
1154
1155     return !(((rect.y + rect.height) > (clientSize.y + startY)) || rect.y < startY);
1156 }
1157
1158 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1159 {
1160     m_caretPosition = position;
1161     m_caretAtLineStart = showAtLineStart;
1162 }
1163
1164 /// Move caret one visual step forward: this may mean setting a flag
1165 /// and keeping the same position if we're going from the end of one line
1166 /// to the start of the next, which may be the exact same caret position.
1167 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1168 {
1169     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1170
1171     // Only do the check if we're not at the end of the paragraph (where things work OK
1172     // anyway)
1173     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1174     {
1175         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1176
1177         if (line)
1178         {
1179             wxRichTextRange lineRange = line->GetAbsoluteRange();
1180
1181             // We're at the end of a line. See whether we need to
1182             // stay at the same actual caret position but change visual
1183             // position, or not.
1184             if (oldPosition == lineRange.GetEnd())
1185             {
1186                 if (m_caretAtLineStart)
1187                 {
1188                     // We're already at the start of the line, so actually move on now.
1189                     m_caretPosition = oldPosition + 1;
1190                     m_caretAtLineStart = false;
1191                 }
1192                 else
1193                 {
1194                     // We're showing at the end of the line, so keep to
1195                     // the same position but indicate that we're to show
1196                     // at the start of the next line.
1197                     m_caretPosition = oldPosition;
1198                     m_caretAtLineStart = true;
1199                 }
1200                 SetDefaultStyleToCursorStyle();
1201                 return;
1202             }
1203         }
1204     }
1205     m_caretPosition ++;
1206     SetDefaultStyleToCursorStyle();
1207 }
1208
1209 /// Move caret one visual step backward: this may mean setting a flag
1210 /// and keeping the same position if we're going from the end of one line
1211 /// to the start of the next, which may be the exact same caret position.
1212 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1213 {
1214     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1215
1216     // Only do the check if we're not at the start of the paragraph (where things work OK
1217     // anyway)
1218     if (para && (oldPosition != para->GetRange().GetStart()))
1219     {
1220         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1221
1222         if (line)
1223         {
1224             wxRichTextRange lineRange = line->GetAbsoluteRange();
1225
1226             // We're at the start of a line. See whether we need to
1227             // stay at the same actual caret position but change visual
1228             // position, or not.
1229             if (oldPosition == lineRange.GetStart())
1230             {
1231                 m_caretPosition = oldPosition-1;
1232                 m_caretAtLineStart = true;
1233                 return;
1234             }
1235             else if (oldPosition == lineRange.GetEnd())
1236             {
1237                 if (m_caretAtLineStart)
1238                 {
1239                     // We're at the start of the line, so keep the same caret position
1240                     // but clear the start-of-line flag.
1241                     m_caretPosition = oldPosition;
1242                     m_caretAtLineStart = false;
1243                 }
1244                 else
1245                 {
1246                     // We're showing at the end of the line, so go back
1247                     // to the previous character position.
1248                     m_caretPosition = oldPosition - 1;
1249                 }
1250                 SetDefaultStyleToCursorStyle();
1251                 return;
1252             }
1253         }
1254     }
1255     m_caretPosition --;
1256     SetDefaultStyleToCursorStyle();
1257 }
1258
1259 /// Move right
1260 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1261 {
1262     long endPos = GetBuffer().GetRange().GetEnd();
1263
1264     if (m_caretPosition + noPositions < endPos)
1265     {
1266         long oldPos = m_caretPosition;
1267         long newPos = m_caretPosition + noPositions;
1268
1269         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1270         if (!extendSel)
1271             SelectNone();
1272
1273         // Determine by looking at oldPos and m_caretPosition whether
1274         // we moved from the end of a line to the start of the next line, in which case
1275         // we want to adjust the caret position such that it is positioned at the
1276         // start of the next line, rather than jumping past the first character of the
1277         // line.
1278         if (noPositions == 1 && !extendSel)
1279             MoveCaretForward(oldPos);
1280         else
1281             SetCaretPosition(newPos);
1282
1283         PositionCaret();
1284         SetDefaultStyleToCursorStyle();
1285
1286         if (extendSel)
1287             Refresh(false);
1288         return true;
1289     }
1290     else
1291         return false;
1292 }
1293
1294 /// Move left
1295 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1296 {
1297     long startPos = -1;
1298
1299     if (m_caretPosition > startPos - noPositions + 1)
1300     {
1301         long oldPos = m_caretPosition;
1302         long newPos = m_caretPosition - noPositions;
1303         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1304         if (!extendSel)
1305             SelectNone();
1306
1307         if (noPositions == 1 && !extendSel)
1308             MoveCaretBack(oldPos);
1309         else
1310             SetCaretPosition(newPos);
1311
1312         PositionCaret();
1313         SetDefaultStyleToCursorStyle();
1314
1315         if (extendSel)
1316             Refresh(false);
1317         return true;
1318     }
1319     else
1320         return false;
1321 }
1322
1323 /// Move up
1324 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1325 {
1326     return MoveDown(- noLines, flags);
1327 }
1328
1329 /// Move up
1330 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1331 {
1332     if (!GetCaret())
1333         return false;
1334
1335     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1336     wxPoint pt = GetCaret()->GetPosition();
1337     long newLine = lineNumber + noLines;
1338
1339     if (lineNumber != -1)
1340     {
1341         if (noLines > 0)
1342         {
1343             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1344
1345             if (newLine > lastLine)
1346                 return false;
1347         }
1348         else
1349         {
1350             if (newLine < 0)
1351                 return false;
1352         }
1353     }
1354
1355     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1356     if (lineObj)
1357     {
1358         pt.y = lineObj->GetAbsolutePosition().y + 2;
1359     }
1360     else
1361         return false;
1362
1363     long newPos = 0;
1364     wxClientDC dc(this);
1365     PrepareDC(dc);
1366     dc.SetFont(GetFont());
1367
1368     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1369
1370     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1371     {
1372         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1373         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1374         // so we view the caret at the start of the line.
1375         bool caretLineStart = false;
1376         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1377         {
1378             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1379             wxRichTextRange lineRange;
1380             if (thisLine)
1381                 lineRange = thisLine->GetAbsoluteRange();
1382
1383             if (thisLine && (newPos-1) == lineRange.GetEnd())
1384             {
1385                 newPos --;
1386                 caretLineStart = true;
1387             }
1388             else
1389             {
1390                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1391                 if (para && para->GetRange().GetStart() == newPos)
1392                     newPos --;
1393             }
1394         }
1395
1396         long newSelEnd = newPos;
1397
1398         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1399         if (!extendSel)
1400             SelectNone();
1401
1402         SetCaretPosition(newPos, caretLineStart);
1403         PositionCaret();
1404         SetDefaultStyleToCursorStyle();
1405
1406         if (extendSel)
1407             Refresh(false);
1408         return true;
1409     }
1410
1411     return false;
1412 }
1413
1414 /// Move to the end of the paragraph
1415 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1416 {
1417     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1418     if (para)
1419     {
1420         long newPos = para->GetRange().GetEnd() - 1;
1421         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1422         if (!extendSel)
1423             SelectNone();
1424
1425         SetCaretPosition(newPos);
1426         PositionCaret();
1427         SetDefaultStyleToCursorStyle();
1428
1429         if (extendSel)
1430             Refresh(false);
1431         return true;
1432     }
1433
1434     return false;
1435 }
1436
1437 /// Move to the start of the paragraph
1438 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1439 {
1440     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1441     if (para)
1442     {
1443         long newPos = para->GetRange().GetStart() - 1;
1444         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1445         if (!extendSel)
1446             SelectNone();
1447
1448         SetCaretPosition(newPos);
1449         PositionCaret();
1450         SetDefaultStyleToCursorStyle();
1451
1452         if (extendSel)
1453             Refresh(false);
1454         return true;
1455     }
1456
1457     return false;
1458 }
1459
1460 /// Move to the end of the line
1461 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1462 {
1463     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1464
1465     if (line)
1466     {
1467         wxRichTextRange lineRange = line->GetAbsoluteRange();
1468         long newPos = lineRange.GetEnd();
1469         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1470         if (!extendSel)
1471             SelectNone();
1472
1473         SetCaretPosition(newPos);
1474         PositionCaret();
1475         SetDefaultStyleToCursorStyle();
1476
1477         if (extendSel)
1478             Refresh(false);
1479         return true;
1480     }
1481
1482     return false;
1483 }
1484
1485 /// Move to the start of the line
1486 bool wxRichTextCtrl::MoveToLineStart(int flags)
1487 {
1488     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1489     if (line)
1490     {
1491         wxRichTextRange lineRange = line->GetAbsoluteRange();
1492         long newPos = lineRange.GetStart()-1;
1493
1494         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1495         if (!extendSel)
1496             SelectNone();
1497
1498         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1499
1500         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1501         PositionCaret();
1502         SetDefaultStyleToCursorStyle();
1503
1504         if (extendSel)
1505             Refresh(false);
1506         return true;
1507     }
1508
1509     return false;
1510 }
1511
1512 /// Move to the start of the buffer
1513 bool wxRichTextCtrl::MoveHome(int flags)
1514 {
1515     if (m_caretPosition != -1)
1516     {
1517         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1518         if (!extendSel)
1519             SelectNone();
1520
1521         SetCaretPosition(-1);
1522         PositionCaret();
1523         SetDefaultStyleToCursorStyle();
1524
1525         if (extendSel)
1526             Refresh(false);
1527         return true;
1528     }
1529     else
1530         return false;
1531 }
1532
1533 /// Move to the end of the buffer
1534 bool wxRichTextCtrl::MoveEnd(int flags)
1535 {
1536     long endPos = GetBuffer().GetRange().GetEnd()-1;
1537
1538     if (m_caretPosition != endPos)
1539     {
1540         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1541         if (!extendSel)
1542             SelectNone();
1543
1544         SetCaretPosition(endPos);
1545         PositionCaret();
1546         SetDefaultStyleToCursorStyle();
1547
1548         if (extendSel)
1549             Refresh(false);
1550         return true;
1551     }
1552     else
1553         return false;
1554 }
1555
1556 /// Move noPages pages up
1557 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1558 {
1559     return PageDown(- noPages, flags);
1560 }
1561
1562 /// Move noPages pages down
1563 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1564 {
1565     // Calculate which line occurs noPages * screen height further down.
1566     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1567     if (line)
1568     {
1569         wxSize clientSize = GetClientSize();
1570         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1571
1572         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1573         if (newLine)
1574         {
1575             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1576             long pos = lineRange.GetStart()-1;
1577             if (pos != m_caretPosition)
1578             {
1579                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1580
1581                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1582                 if (!extendSel)
1583                     SelectNone();
1584
1585                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1586                 PositionCaret();
1587                 SetDefaultStyleToCursorStyle();
1588
1589                 if (extendSel)
1590                     Refresh(false);
1591                 return true;
1592             }
1593         }
1594     }
1595
1596     return false;
1597 }
1598
1599 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1600 {
1601     return str == wxT(" ") || str == wxT("\t");
1602 }
1603
1604 // Finds the caret position for the next word
1605 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1606 {
1607     long endPos = GetBuffer().GetRange().GetEnd();
1608
1609     if (direction > 0)
1610     {
1611         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1612
1613         // First skip current text to space
1614         while (i < endPos && i > -1)
1615         {
1616             // i is in character, not caret positions
1617             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1618             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1619             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1620             {
1621                 break;
1622             }
1623             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1624                 i += direction;
1625             else
1626             {
1627                 break;
1628             }
1629         }
1630         while (i < endPos && i > -1)
1631         {
1632             // i is in character, not caret positions
1633             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1634             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1635             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1636                 return wxMax(-1, i);
1637
1638             if (text.empty()) // End of paragraph, or maybe an image
1639                 return wxMax(-1, i - 1);
1640             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1641                 i += direction;
1642             else
1643             {
1644                 // Convert to caret position
1645                 return wxMax(-1, i - 1);
1646             }
1647         }
1648         if (i >= endPos)
1649             return endPos-1;
1650         return i-1;
1651     }
1652     else
1653     {
1654         long i = m_caretPosition;
1655
1656         // First skip white space
1657         while (i < endPos && i > -1)
1658         {
1659             // i is in character, not caret positions
1660             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1661             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1662
1663             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1664                 break;
1665             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1666                 i += direction;
1667             else
1668                 break;
1669         }
1670         // Next skip current text to space
1671         while (i < endPos && i > -1)
1672         {
1673             // i is in character, not caret positions
1674             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1675             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1676             if (line && line->GetAbsoluteRange().GetStart() == i)
1677                 return i-1;
1678
1679             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1680                 i += direction;
1681             else
1682             {
1683                 return i;
1684             }
1685         }
1686         if (i < -1)
1687             return -1;
1688         return i;
1689     }
1690 }
1691
1692 /// Move n words left
1693 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1694 {
1695     long pos = FindNextWordPosition(-1);
1696     if (pos != m_caretPosition)
1697     {
1698         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1699
1700         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1701         if (!extendSel)
1702             SelectNone();
1703
1704         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1705         PositionCaret();
1706         SetDefaultStyleToCursorStyle();
1707
1708         if (extendSel)
1709             Refresh(false);
1710         return true;
1711     }
1712
1713     return false;
1714 }
1715
1716 /// Move n words right
1717 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1718 {
1719     long pos = FindNextWordPosition(1);
1720     if (pos != m_caretPosition)
1721     {
1722         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1723
1724         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1725         if (!extendSel)
1726             SelectNone();
1727
1728         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1729         PositionCaret();
1730         SetDefaultStyleToCursorStyle();
1731
1732         if (extendSel)
1733             Refresh(false);
1734         return true;
1735     }
1736
1737     return false;
1738 }
1739
1740 /// Sizing
1741 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1742 {
1743     // Only do sizing optimization for large buffers
1744     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1745     {
1746         m_fullLayoutRequired = true;
1747         m_fullLayoutTime = wxGetLocalTimeMillis();
1748         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1749         LayoutContent(true /* onlyVisibleRect */);
1750     }
1751     else
1752         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1753
1754 #if wxRICHTEXT_BUFFERED_PAINTING
1755     RecreateBuffer();
1756 #endif
1757
1758     event.Skip();
1759 }
1760
1761
1762 /// Idle-time processing
1763 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1764 {
1765     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1766
1767     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1768     {
1769         m_fullLayoutRequired = false;
1770         m_fullLayoutTime = 0;
1771         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1772         ShowPosition(m_fullLayoutSavedPosition);
1773         Refresh(false);
1774     }
1775
1776     if (m_caretPositionForDefaultStyle != -2)
1777     {
1778         // If the caret position has changed, no longer reflect the default style
1779         // in the UI.
1780         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1781             m_caretPositionForDefaultStyle = -2;
1782     }
1783
1784     event.Skip();
1785 }
1786
1787 /// Scrolling
1788 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1789 {
1790     // Not used
1791     event.Skip();
1792 }
1793
1794 /// Set up scrollbars, e.g. after a resize
1795 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1796 {
1797     if (m_freezeCount)
1798         return;
1799
1800     if (GetBuffer().IsEmpty())
1801     {
1802         SetScrollbars(0, 0, 0, 0, 0, 0);
1803         return;
1804     }
1805
1806     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1807     // of pixels. See e.g. wxVScrolledWindow for ideas.
1808     int pixelsPerUnit = 5;
1809     wxSize clientSize = GetClientSize();
1810
1811     int maxHeight = GetBuffer().GetCachedSize().y;
1812
1813     // Round up so we have at least maxHeight pixels
1814     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1815
1816     int startX = 0, startY = 0;
1817     if (!atTop)
1818         GetViewStart(& startX, & startY);
1819
1820     int maxPositionX = 0; // wxMax(sz.x - clientSize.x, 0);
1821     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
1822
1823     // Move to previous scroll position if
1824     // possible
1825     SetScrollbars(0, pixelsPerUnit,
1826         0, unitsY,
1827         wxMin(maxPositionX, startX), wxMin(maxPositionY, startY));
1828 }
1829
1830 /// Paint the background
1831 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1832 {
1833     wxColour backgroundColour = GetBackgroundColour();
1834     if (!backgroundColour.Ok())
1835         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1836
1837     // Clear the background
1838     dc.SetBrush(wxBrush(backgroundColour));
1839     dc.SetPen(*wxTRANSPARENT_PEN);
1840     wxRect windowRect(GetClientSize());
1841     windowRect.x -= 2; windowRect.y -= 2;
1842     windowRect.width += 4; windowRect.height += 4;
1843
1844     // We need to shift the rectangle to take into account
1845     // scrolling. Converting device to logical coordinates.
1846     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1847     dc.DrawRectangle(windowRect);
1848 }
1849
1850 #if wxRICHTEXT_BUFFERED_PAINTING
1851 /// Recreate buffer bitmap if necessary
1852 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1853 {
1854     wxSize sz = size;
1855     if (sz == wxDefaultSize)
1856         sz = GetClientSize();
1857
1858     if (sz.x < 1 || sz.y < 1)
1859         return false;
1860
1861     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1862         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1863     return m_bufferBitmap.Ok();
1864 }
1865 #endif
1866
1867 // ----------------------------------------------------------------------------
1868 // file IO functions
1869 // ----------------------------------------------------------------------------
1870
1871 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
1872 {
1873     bool success = GetBuffer().LoadFile(filename, fileType);
1874     if (success)
1875         m_filename = filename;
1876
1877     DiscardEdits();
1878     SetInsertionPoint(0);
1879     LayoutContent();
1880     PositionCaret();
1881     SetupScrollbars(true);
1882     Refresh(false);
1883     wxTextCtrl::SendTextUpdatedEvent(this);
1884
1885     if (success)
1886         return true;
1887     else
1888     {
1889         wxLogError(_("File couldn't be loaded."));
1890
1891         return false;
1892     }
1893 }
1894
1895 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
1896 {
1897     if (GetBuffer().SaveFile(filename, fileType))
1898     {
1899         m_filename = filename;
1900
1901         DiscardEdits();
1902
1903         return true;
1904     }
1905
1906     wxLogError(_("The text couldn't be saved."));
1907
1908     return false;
1909 }
1910
1911 // ----------------------------------------------------------------------------
1912 // wxRichTextCtrl specific functionality
1913 // ----------------------------------------------------------------------------
1914
1915 /// Add a new paragraph of text to the end of the buffer
1916 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
1917 {
1918     return GetBuffer().AddParagraph(text);
1919 }
1920
1921 /// Add an image
1922 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
1923 {
1924     return GetBuffer().AddImage(image);
1925 }
1926
1927 // ----------------------------------------------------------------------------
1928 // selection and ranges
1929 // ----------------------------------------------------------------------------
1930
1931 void wxRichTextCtrl::SelectAll()
1932 {
1933     SetSelection(0, GetLastPosition()+1);
1934     m_selectionAnchor = -1;
1935 }
1936
1937 /// Select none
1938 void wxRichTextCtrl::SelectNone()
1939 {
1940     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
1941         SetSelection(-2, -2);
1942     m_selectionAnchor = -2;
1943 }
1944
1945 static bool wxIsWordDelimiter(const wxString& text)
1946 {
1947     return !text.IsEmpty() && !wxIsalnum(text[0]);
1948 }
1949
1950 /// Select the word at the given character position
1951 bool wxRichTextCtrl::SelectWord(long position)
1952 {
1953     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
1954         return false;
1955
1956     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
1957     if (!para)
1958         return false;
1959
1960     long positionStart = position;
1961     long positionEnd = position;
1962
1963     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
1964     {
1965         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
1966         if (wxIsWordDelimiter(text))
1967         {
1968             positionStart ++;
1969             break;
1970         }
1971     }
1972     if (positionStart < para->GetRange().GetStart())
1973         positionStart = para->GetRange().GetStart();
1974
1975     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
1976     {
1977         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
1978         if (wxIsWordDelimiter(text))
1979         {
1980             positionEnd --;
1981             break;
1982         }
1983     }
1984     if (positionEnd >= para->GetRange().GetEnd())
1985         positionEnd = para->GetRange().GetEnd();
1986
1987     SetSelection(positionStart, positionEnd+1);
1988
1989     if (positionStart >= 0)
1990     {
1991         MoveCaret(positionStart-1, true);
1992         SetDefaultStyleToCursorStyle();
1993     }
1994
1995     return true;
1996 }
1997
1998 wxString wxRichTextCtrl::GetStringSelection() const
1999 {
2000     long from, to;
2001     GetSelection(&from, &to);
2002
2003     return GetRange(from, to);
2004 }
2005
2006 // ----------------------------------------------------------------------------
2007 // hit testing
2008 // ----------------------------------------------------------------------------
2009
2010 wxTextCtrlHitTestResult
2011 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2012 {
2013     // implement in terms of the other overload as the native ports typically
2014     // can get the position and not (x, y) pair directly (although wxUniv
2015     // directly gets x and y -- and so overrides this method as well)
2016     long pos;
2017     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2018
2019     if ( rc != wxTE_HT_UNKNOWN )
2020     {
2021         PositionToXY(pos, x, y);
2022     }
2023
2024     return rc;
2025 }
2026
2027 wxTextCtrlHitTestResult
2028 wxRichTextCtrl::HitTest(const wxPoint& pt,
2029                         long * pos) const
2030 {
2031     wxClientDC dc((wxRichTextCtrl*) this);
2032     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2033
2034     // Buffer uses logical position (relative to start of buffer)
2035     // so convert
2036     wxPoint pt2 = GetLogicalPoint(pt);
2037
2038     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
2039
2040     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2041         return wxTE_HT_BEFORE;
2042     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2043         return wxTE_HT_BEYOND;
2044     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2045         return wxTE_HT_ON_TEXT;
2046
2047     return wxTE_HT_UNKNOWN;
2048 }
2049
2050 // ----------------------------------------------------------------------------
2051 // set/get the controls text
2052 // ----------------------------------------------------------------------------
2053
2054 wxString wxRichTextCtrl::GetValue() const
2055 {
2056     return GetBuffer().GetText();
2057 }
2058
2059 wxString wxRichTextCtrl::GetRange(long from, long to) const
2060 {
2061     // Public API for range is different from internals
2062     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2063 }
2064
2065 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2066 {
2067     Clear();
2068
2069     if (!value.IsEmpty())
2070     {
2071         // Remove empty paragraph
2072         GetBuffer().Clear();
2073         DoWriteText(value);
2074
2075         // for compatibility, don't move the cursor when doing SetValue()
2076         SetInsertionPoint(0);
2077     }
2078     else
2079     {
2080         // still send an event for consistency
2081         if (flags & SetValue_SendEvent)
2082             wxTextCtrl::SendTextUpdatedEvent(this);
2083     }
2084     DiscardEdits();
2085 }
2086
2087 void wxRichTextCtrl::WriteText(const wxString& value)
2088 {
2089     DoWriteText(value);
2090 }
2091
2092 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2093 {
2094     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2095
2096     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2097
2098     if ( flags & SetValue_SendEvent )
2099         wxTextCtrl::SendTextUpdatedEvent(this);
2100 }
2101
2102 void wxRichTextCtrl::AppendText(const wxString& text)
2103 {
2104     SetInsertionPointEnd();
2105
2106     WriteText(text);
2107 }
2108
2109 /// Write an image at the current insertion point
2110 bool wxRichTextCtrl::WriteImage(const wxImage& image, int bitmapType)
2111 {
2112     wxRichTextImageBlock imageBlock;
2113
2114     wxImage image2 = image;
2115     if (imageBlock.MakeImageBlock(image2, bitmapType))
2116         return WriteImage(imageBlock);
2117
2118     return false;
2119 }
2120
2121 bool wxRichTextCtrl::WriteImage(const wxString& filename, int bitmapType)
2122 {
2123     wxRichTextImageBlock imageBlock;
2124
2125     wxImage image;
2126     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2127         return WriteImage(imageBlock);
2128
2129     return false;
2130 }
2131
2132 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2133 {
2134     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2135 }
2136
2137 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, int bitmapType)
2138 {
2139     if (bitmap.Ok())
2140     {
2141         wxRichTextImageBlock imageBlock;
2142
2143         wxImage image = bitmap.ConvertToImage();
2144         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2145             return WriteImage(imageBlock);
2146     }
2147
2148     return false;
2149 }
2150
2151 /// Insert a newline (actually paragraph) at the current insertion point.
2152 bool wxRichTextCtrl::Newline()
2153 {
2154     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
2155 }
2156
2157 /// Insert a line break at the current insertion point.
2158 bool wxRichTextCtrl::LineBreak()
2159 {
2160     wxString text;
2161     text = wxRichTextLineBreakChar;
2162     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2163 }
2164
2165 // ----------------------------------------------------------------------------
2166 // Clipboard operations
2167 // ----------------------------------------------------------------------------
2168
2169 void wxRichTextCtrl::Copy()
2170 {
2171     if (CanCopy())
2172     {
2173         wxRichTextRange range = GetInternalSelectionRange();
2174         GetBuffer().CopyToClipboard(range);
2175     }
2176 }
2177
2178 void wxRichTextCtrl::Cut()
2179 {
2180     if (CanCut())
2181     {
2182         wxRichTextRange range = GetInternalSelectionRange();
2183         GetBuffer().CopyToClipboard(range);
2184
2185         DeleteSelectedContent();
2186         LayoutContent();
2187         Refresh(false);
2188     }
2189 }
2190
2191 void wxRichTextCtrl::Paste()
2192 {
2193     if (CanPaste())
2194     {
2195         BeginBatchUndo(_("Paste"));
2196
2197         long newPos = m_caretPosition;
2198         DeleteSelectedContent(& newPos);
2199
2200         GetBuffer().PasteFromClipboard(newPos);
2201
2202         EndBatchUndo();
2203     }
2204 }
2205
2206 void wxRichTextCtrl::DeleteSelection()
2207 {
2208     if (CanDeleteSelection())
2209     {
2210         DeleteSelectedContent();
2211     }
2212 }
2213
2214 bool wxRichTextCtrl::HasSelection() const
2215 {
2216     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2217 }
2218
2219 bool wxRichTextCtrl::CanCopy() const
2220 {
2221     // Can copy if there's a selection
2222     return HasSelection();
2223 }
2224
2225 bool wxRichTextCtrl::CanCut() const
2226 {
2227     return HasSelection() && IsEditable();
2228 }
2229
2230 bool wxRichTextCtrl::CanPaste() const
2231 {
2232     if ( !IsEditable() )
2233         return false;
2234
2235     return GetBuffer().CanPasteFromClipboard();
2236 }
2237
2238 bool wxRichTextCtrl::CanDeleteSelection() const
2239 {
2240     return HasSelection() && IsEditable();
2241 }
2242
2243
2244 // ----------------------------------------------------------------------------
2245 // Accessors
2246 // ----------------------------------------------------------------------------
2247
2248 void wxRichTextCtrl::SetEditable(bool editable)
2249 {
2250     m_editable = editable;
2251 }
2252
2253 void wxRichTextCtrl::SetInsertionPoint(long pos)
2254 {
2255     SelectNone();
2256
2257     m_caretPosition = pos - 1;
2258 }
2259
2260 void wxRichTextCtrl::SetInsertionPointEnd()
2261 {
2262     long pos = GetLastPosition();
2263     SetInsertionPoint(pos);
2264 }
2265
2266 long wxRichTextCtrl::GetInsertionPoint() const
2267 {
2268     return m_caretPosition+1;
2269 }
2270
2271 wxTextPos wxRichTextCtrl::GetLastPosition() const
2272 {
2273     return GetBuffer().GetRange().GetEnd();
2274 }
2275
2276 // If the return values from and to are the same, there is no
2277 // selection.
2278 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2279 {
2280     *from = m_selectionRange.GetStart();
2281     *to = m_selectionRange.GetEnd();
2282     if ((*to) != -1 && (*to) != -2)
2283         (*to) ++;
2284 }
2285
2286 bool wxRichTextCtrl::IsEditable() const
2287 {
2288     return m_editable;
2289 }
2290
2291 // ----------------------------------------------------------------------------
2292 // selection
2293 // ----------------------------------------------------------------------------
2294
2295 void wxRichTextCtrl::SetSelection(long from, long to)
2296 {
2297     // if from and to are both -1, it means (in wxWidgets) that all text should
2298     // be selected.
2299     if ( (from == -1) && (to == -1) )
2300     {
2301         from = 0;
2302         to = GetLastPosition()+1;
2303     }
2304
2305     DoSetSelection(from, to);
2306 }
2307
2308 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2309 {
2310     m_selectionAnchor = from;
2311     m_selectionRange.SetRange(from, to-1);
2312     if (from > -2)
2313         m_caretPosition = from-1;
2314
2315     Refresh(false);
2316     PositionCaret();
2317 }
2318
2319 // ----------------------------------------------------------------------------
2320 // Editing
2321 // ----------------------------------------------------------------------------
2322
2323 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2324                              const wxString& value)
2325 {
2326     BeginBatchUndo(_("Replace"));
2327
2328     DeleteSelectedContent();
2329
2330     DoWriteText(value, SetValue_SelectionOnly);
2331
2332     EndBatchUndo();
2333 }
2334
2335 void wxRichTextCtrl::Remove(long from, long to)
2336 {
2337     SelectNone();
2338
2339     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to), this);
2340
2341     LayoutContent();
2342     if (!IsFrozen())
2343         Refresh(false);
2344 }
2345
2346 bool wxRichTextCtrl::IsModified() const
2347 {
2348     return m_buffer.IsModified();
2349 }
2350
2351 void wxRichTextCtrl::MarkDirty()
2352 {
2353     m_buffer.Modify(true);
2354 }
2355
2356 void wxRichTextCtrl::DiscardEdits()
2357 {
2358     m_caretPositionForDefaultStyle = -2;
2359     m_buffer.Modify(false);
2360     m_buffer.GetCommandProcessor()->ClearCommands();
2361 }
2362
2363 int wxRichTextCtrl::GetNumberOfLines() const
2364 {
2365     return GetBuffer().GetParagraphCount();
2366 }
2367
2368 // ----------------------------------------------------------------------------
2369 // Positions <-> coords
2370 // ----------------------------------------------------------------------------
2371
2372 long wxRichTextCtrl::XYToPosition(long x, long y) const
2373 {
2374     return GetBuffer().XYToPosition(x, y);
2375 }
2376
2377 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2378 {
2379     return GetBuffer().PositionToXY(pos, x, y);
2380 }
2381
2382 // ----------------------------------------------------------------------------
2383 //
2384 // ----------------------------------------------------------------------------
2385
2386 void wxRichTextCtrl::ShowPosition(long pos)
2387 {
2388     if (!IsPositionVisible(pos))
2389         ScrollIntoView(pos-1, WXK_DOWN);
2390 }
2391
2392 int wxRichTextCtrl::GetLineLength(long lineNo) const
2393 {
2394     return GetBuffer().GetParagraphLength(lineNo);
2395 }
2396
2397 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2398 {
2399     return GetBuffer().GetParagraphText(lineNo);
2400 }
2401
2402 // ----------------------------------------------------------------------------
2403 // Undo/redo
2404 // ----------------------------------------------------------------------------
2405
2406 void wxRichTextCtrl::Undo()
2407 {
2408     if (CanUndo())
2409     {
2410         GetCommandProcessor()->Undo();
2411     }
2412 }
2413
2414 void wxRichTextCtrl::Redo()
2415 {
2416     if (CanRedo())
2417     {
2418         GetCommandProcessor()->Redo();
2419     }
2420 }
2421
2422 bool wxRichTextCtrl::CanUndo() const
2423 {
2424     return GetCommandProcessor()->CanUndo();
2425 }
2426
2427 bool wxRichTextCtrl::CanRedo() const
2428 {
2429     return GetCommandProcessor()->CanRedo();
2430 }
2431
2432 // ----------------------------------------------------------------------------
2433 // implementation details
2434 // ----------------------------------------------------------------------------
2435
2436 void wxRichTextCtrl::Command(wxCommandEvent& event)
2437 {
2438     SetValue(event.GetString());
2439     GetEventHandler()->ProcessEvent(event);
2440 }
2441
2442 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2443 {
2444     // By default, load the first file into the text window.
2445     if (event.GetNumberOfFiles() > 0)
2446     {
2447         LoadFile(event.GetFiles()[0]);
2448     }
2449 }
2450
2451 wxSize wxRichTextCtrl::DoGetBestSize() const
2452 {
2453     return wxSize(10, 10);
2454 }
2455
2456 // ----------------------------------------------------------------------------
2457 // standard handlers for standard edit menu events
2458 // ----------------------------------------------------------------------------
2459
2460 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2461 {
2462     Cut();
2463 }
2464
2465 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2466 {
2467     DeleteSelection();
2468 }
2469
2470 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2471 {
2472     Copy();
2473 }
2474
2475 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2476 {
2477     Paste();
2478 }
2479
2480 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2481 {
2482     Undo();
2483 }
2484
2485 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2486 {
2487     Redo();
2488 }
2489
2490 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2491 {
2492     event.Enable( CanCut() );
2493 }
2494
2495 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2496 {
2497     event.Enable( CanCopy() );
2498 }
2499
2500 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2501 {
2502     event.Enable( CanDeleteSelection() );
2503 }
2504
2505 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2506 {
2507     event.Enable( CanPaste() );
2508 }
2509
2510 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2511 {
2512     event.Enable( CanUndo() );
2513     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2514 }
2515
2516 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2517 {
2518     event.Enable( CanRedo() );
2519     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2520 }
2521
2522 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2523 {
2524     SelectAll();
2525 }
2526
2527 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2528 {
2529     event.Enable(GetLastPosition() > 0);
2530 }
2531
2532 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2533 {
2534     if (event.GetEventObject() != this)
2535     {
2536         event.Skip();
2537         return;
2538     }
2539
2540     if (!m_contextMenu)
2541     {
2542         m_contextMenu = new wxMenu;
2543         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2544         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2545         m_contextMenu->AppendSeparator();
2546         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2547         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2548         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2549         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2550         m_contextMenu->AppendSeparator();
2551         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2552     }
2553     PopupMenu(m_contextMenu);
2554     return;
2555 }
2556
2557 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttrEx& style)
2558 {
2559     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style);
2560 }
2561
2562 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2563 {
2564     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttrEx(style));
2565 }
2566
2567 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxRichTextAttr& style)
2568 {
2569     return GetBuffer().SetStyle(range.ToInternal(), style);
2570 }
2571
2572 // extended style setting operation with flags including:
2573 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2574 // see richtextbuffer.h for more details.
2575 bool wxRichTextCtrl::SetStyleEx(long start, long end, const wxTextAttrEx& style, int flags)
2576 {
2577     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style, flags);
2578 }
2579
2580 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttrEx& style, int flags)
2581 {
2582     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2583 }
2584
2585 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxRichTextAttr& style, int flags)
2586 {
2587     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2588 }
2589
2590 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttrEx& style)
2591 {
2592     return GetBuffer().SetDefaultStyle(style);
2593 }
2594
2595 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2596 {
2597     return GetBuffer().SetDefaultStyle(wxTextAttrEx(style));
2598 }
2599
2600 const wxTextAttrEx& wxRichTextCtrl::GetDefaultStyleEx() const
2601 {
2602     return GetBuffer().GetDefaultStyle();
2603 }
2604
2605 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2606 {
2607     return GetBuffer().GetDefaultStyle();
2608 }
2609
2610 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2611 {
2612     wxTextAttrEx attr(style);
2613     if (GetBuffer().GetStyle(position, attr))
2614     {
2615         style = attr;
2616         return true;
2617     }
2618     else
2619         return false;
2620 }
2621
2622 bool wxRichTextCtrl::GetStyle(long position, wxTextAttrEx& style)
2623 {
2624     return GetBuffer().GetStyle(position, style);
2625 }
2626
2627 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style)
2628 {
2629     return GetBuffer().GetStyle(position, style);
2630 }
2631
2632 // get the common set of styles for the range
2633 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxRichTextAttr& style)
2634 {
2635     wxTextAttrEx styleEx;
2636     if (GetBuffer().GetStyleForRange(range.ToInternal(), styleEx))
2637     {
2638         style = styleEx;
2639         return true;
2640     }
2641     else
2642         return false;
2643 }
2644
2645 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttrEx& style)
2646 {
2647     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2648 }
2649
2650 /// Get the content (uncombined) attributes for this position.
2651
2652 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2653 {
2654     wxTextAttrEx attr(style);
2655     if (GetBuffer().GetUncombinedStyle(position, attr))
2656     {
2657         style = attr;
2658         return true;
2659     }
2660     else
2661         return false;
2662 }
2663
2664 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttrEx& style)
2665 {
2666     return GetBuffer().GetUncombinedStyle(position, style);
2667 }
2668
2669 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style)
2670 {
2671     return GetBuffer().GetUncombinedStyle(position, style);
2672 }
2673
2674 /// Set font, and also the buffer attributes
2675 bool wxRichTextCtrl::SetFont(const wxFont& font)
2676 {
2677     wxControl::SetFont(font);
2678
2679     wxTextAttrEx attr = GetBuffer().GetAttributes();
2680     attr.SetFont(font);
2681     GetBuffer().SetBasicStyle(attr);
2682
2683     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2684     Refresh(false);
2685
2686     return true;
2687 }
2688
2689 /// Transform logical to physical
2690 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2691 {
2692     wxPoint pt;
2693     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2694
2695     return pt;
2696 }
2697
2698 /// Transform physical to logical
2699 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2700 {
2701     wxPoint pt;
2702     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2703
2704     return pt;
2705 }
2706
2707 /// Position the caret
2708 void wxRichTextCtrl::PositionCaret()
2709 {
2710     if (!GetCaret())
2711         return;
2712
2713     //wxLogDebug(wxT("PositionCaret"));
2714
2715     wxRect caretRect;
2716     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2717     {
2718         wxPoint newPt = caretRect.GetPosition();
2719         wxSize newSz = caretRect.GetSize();
2720         wxPoint pt = GetPhysicalPoint(newPt);
2721         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
2722         {
2723             GetCaret()->Move(pt);
2724             GetCaret()->SetSize(newSz);
2725         }
2726     }
2727 }
2728
2729 /// Get the caret height and position for the given character position
2730 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2731 {
2732     wxClientDC dc(this);
2733     dc.SetFont(GetFont());
2734
2735     PrepareDC(dc);
2736
2737     wxPoint pt;
2738     int height = 0;
2739
2740     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2741     {
2742         // Caret height can't be zero
2743         if (height == 0)
2744             height = dc.GetCharHeight();
2745
2746         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2747         return true;
2748     }
2749
2750     return false;
2751 }
2752
2753 /// Gets the line for the visible caret position. If the caret is
2754 /// shown at the very end of the line, it means the next character is actually
2755 /// on the following line. So let's get the line we're expecting to find
2756 /// if this is the case.
2757 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2758 {
2759     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2760     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2761     if (line)
2762     {
2763         wxRichTextRange lineRange = line->GetAbsoluteRange();
2764         if (caretPosition == lineRange.GetStart()-1 &&
2765             (para->GetRange().GetStart() != lineRange.GetStart()))
2766         {
2767             if (!m_caretAtLineStart)
2768                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2769         }
2770     }
2771     return line;
2772 }
2773
2774
2775 /// Move the caret to the given character position
2776 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2777 {
2778     if (GetBuffer().GetDirty())
2779         LayoutContent();
2780
2781     if (pos <= GetBuffer().GetRange().GetEnd())
2782     {
2783         SetCaretPosition(pos, showAtLineStart);
2784
2785         PositionCaret();
2786
2787         return true;
2788     }
2789     else
2790         return false;
2791 }
2792
2793 /// Layout the buffer: which we must do before certain operations, such as
2794 /// setting the caret position.
2795 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2796 {
2797     if (GetBuffer().GetDirty() || onlyVisibleRect)
2798     {
2799         wxRect availableSpace(GetClientSize());
2800         if (availableSpace.width == 0)
2801             availableSpace.width = 10;
2802         if (availableSpace.height == 0)
2803             availableSpace.height = 10;
2804
2805         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2806         if (onlyVisibleRect)
2807         {
2808             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2809             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2810         }
2811
2812         wxClientDC dc(this);
2813         dc.SetFont(GetFont());
2814
2815         PrepareDC(dc);
2816
2817         GetBuffer().Defragment();
2818         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2819         GetBuffer().Layout(dc, availableSpace, flags);
2820         GetBuffer().SetDirty(false);
2821
2822         if (!IsFrozen())
2823             SetupScrollbars();
2824     }
2825
2826     return true;
2827 }
2828
2829 /// Is all of the selection bold?
2830 bool wxRichTextCtrl::IsSelectionBold()
2831 {
2832     if (HasSelection())
2833     {
2834         wxRichTextAttr attr;
2835         wxRichTextRange range = GetSelectionRange();
2836         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2837         attr.SetFontWeight(wxBOLD);
2838
2839         return HasCharacterAttributes(range, attr);
2840     }
2841     else
2842     {
2843         // If no selection, then we need to combine current style with default style
2844         // to see what the effect would be if we started typing.
2845         wxRichTextAttr attr;
2846         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2847
2848         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2849         if (GetStyle(pos, attr))
2850         {
2851             if (IsDefaultStyleShowing())
2852                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2853             return attr.GetFontWeight() == wxBOLD;
2854         }
2855     }
2856     return false;
2857 }
2858
2859 /// Is all of the selection italics?
2860 bool wxRichTextCtrl::IsSelectionItalics()
2861 {
2862     if (HasSelection())
2863     {
2864         wxRichTextRange range = GetSelectionRange();
2865         wxRichTextAttr attr;
2866         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2867         attr.SetFontStyle(wxITALIC);
2868
2869         return HasCharacterAttributes(range, attr);
2870     }
2871     else
2872     {
2873         // If no selection, then we need to combine current style with default style
2874         // to see what the effect would be if we started typing.
2875         wxRichTextAttr attr;
2876         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2877
2878         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2879         if (GetStyle(pos, attr))
2880         {
2881             if (IsDefaultStyleShowing())
2882                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2883             return attr.GetFontStyle() == wxITALIC;
2884         }
2885     }
2886     return false;
2887 }
2888
2889 /// Is all of the selection underlined?
2890 bool wxRichTextCtrl::IsSelectionUnderlined()
2891 {
2892     if (HasSelection())
2893     {
2894         wxRichTextRange range = GetSelectionRange();
2895         wxRichTextAttr attr;
2896         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2897         attr.SetFontUnderlined(true);
2898
2899         return HasCharacterAttributes(range, attr);
2900     }
2901     else
2902     {
2903         // If no selection, then we need to combine current style with default style
2904         // to see what the effect would be if we started typing.
2905         wxRichTextAttr attr;
2906         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2907         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2908
2909         if (GetStyle(pos, attr))
2910         {
2911             if (IsDefaultStyleShowing())
2912                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2913             return attr.GetFontUnderlined();
2914         }
2915     }
2916     return false;
2917 }
2918
2919 /// Apply bold to the selection
2920 bool wxRichTextCtrl::ApplyBoldToSelection()
2921 {
2922     wxRichTextAttr attr;
2923     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2924     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
2925
2926     if (HasSelection())
2927         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2928     else
2929         SetAndShowDefaultStyle(attr);
2930     return true;
2931 }
2932
2933 /// Apply italic to the selection
2934 bool wxRichTextCtrl::ApplyItalicToSelection()
2935 {
2936     wxRichTextAttr attr;
2937     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2938     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
2939
2940     if (HasSelection())
2941         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2942     else
2943         SetAndShowDefaultStyle(attr);
2944     return true;
2945 }
2946
2947 /// Apply underline to the selection
2948 bool wxRichTextCtrl::ApplyUnderlineToSelection()
2949 {
2950     wxRichTextAttr attr;
2951     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2952     attr.SetFontUnderlined(!IsSelectionUnderlined());
2953
2954     if (HasSelection())
2955         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2956     else
2957         SetAndShowDefaultStyle(attr);
2958     return true;
2959 }
2960
2961 /// Is all of the selection aligned according to the specified flag?
2962 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
2963 {
2964     wxRichTextRange range;
2965     if (HasSelection())
2966         range = GetSelectionRange();
2967     else
2968         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
2969
2970     wxRichTextAttr attr;
2971     attr.SetAlignment(alignment);
2972
2973     return HasParagraphAttributes(range, attr);
2974 }
2975
2976 /// Apply alignment to the selection
2977 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
2978 {
2979     wxRichTextAttr attr;
2980     attr.SetAlignment(alignment);
2981     if (HasSelection())
2982         return SetStyle(GetSelectionRange(), attr);
2983     else
2984     {
2985         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
2986         if (para)
2987             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
2988     }
2989     return true;
2990 }
2991
2992 /// Apply a named style to the selection
2993 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
2994 {
2995     // Flags are defined within each definition, so only certain
2996     // attributes are applied.
2997     wxRichTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
2998
2999     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE;
3000
3001     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
3002     {
3003         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3004
3005         wxRichTextRange range;
3006
3007         if (HasSelection())
3008             range = GetSelectionRange();
3009         else
3010         {
3011             long pos = GetAdjustedCaretPosition(GetCaretPosition());
3012             range = wxRichTextRange(pos, pos+1);
3013         }
3014
3015         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
3016     }
3017
3018     // Make sure the attr has the style name
3019     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
3020     {
3021         attr.SetParagraphStyleName(def->GetName());
3022
3023         // If applying a paragraph style, we only want the paragraph nodes to adopt these
3024         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
3025         // to change its style independently.
3026         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3027     }
3028     else
3029         attr.SetCharacterStyleName(def->GetName());
3030
3031     if (HasSelection())
3032         return SetStyleEx(GetSelectionRange(), attr, flags);
3033     else
3034     {
3035         SetAndShowDefaultStyle(attr);
3036         return true;
3037     }
3038 }
3039
3040 /// Apply the style sheet to the buffer, for example if the styles have changed.
3041 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
3042 {
3043     if (!styleSheet)
3044         styleSheet = GetBuffer().GetStyleSheet();
3045     if (!styleSheet)
3046         return false;
3047
3048     if (GetBuffer().ApplyStyleSheet(styleSheet))
3049     {
3050         GetBuffer().Invalidate(wxRICHTEXT_ALL);
3051         Refresh(false);
3052         return true;
3053     }
3054     else
3055         return false;
3056 }
3057
3058 /// Sets the default style to the style under the cursor
3059 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3060 {
3061     wxTextAttrEx attr;
3062     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3063
3064     // If at the start of a paragraph, use the next position.
3065     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3066
3067     if (GetUncombinedStyle(pos, attr))
3068     {
3069         SetDefaultStyle(attr);
3070         return true;
3071     }
3072
3073     return false;
3074 }
3075
3076 /// Returns the first visible position in the current view
3077 long wxRichTextCtrl::GetFirstVisiblePosition() const
3078 {
3079     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3080     if (line)
3081         return line->GetAbsoluteRange().GetStart();
3082     else
3083         return 0;
3084 }
3085
3086 /// Get the first visible point in the window
3087 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3088 {
3089     int ppuX, ppuY;
3090     int startXUnits, startYUnits;
3091
3092     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3093     GetViewStart(& startXUnits, & startYUnits);
3094
3095     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3096 }
3097
3098 /// The adjusted caret position is the character position adjusted to take
3099 /// into account whether we're at the start of a paragraph, in which case
3100 /// style information should be taken from the next position, not current one.
3101 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3102 {
3103     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3104
3105     if (para && (caretPos+1 == para->GetRange().GetStart()))
3106         caretPos ++;
3107     return caretPos;
3108 }
3109
3110 /// Get/set the selection range in character positions. -1, -1 means no selection.
3111 /// The range is in API convention, i.e. a single character selection is denoted
3112 /// by (n, n+1)
3113 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3114 {
3115     wxRichTextRange range = GetInternalSelectionRange();
3116     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3117         range.SetEnd(range.GetEnd() + 1);
3118     return range;
3119 }
3120
3121 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3122 {
3123     wxRichTextRange range1(range);
3124     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3125         range1.SetEnd(range1.GetEnd() - 1);
3126
3127     wxASSERT( range1.GetStart() > range1.GetEnd() );
3128
3129     SetInternalSelectionRange(range1);
3130 }
3131
3132 /// Set list style
3133 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3134 {
3135     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3136 }
3137
3138 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3139 {
3140     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3141 }
3142
3143 /// Clear list for given range
3144 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3145 {
3146     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3147 }
3148
3149 /// Number/renumber any list elements in the given range
3150 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3151 {
3152     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3153 }
3154
3155 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3156 {
3157     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3158 }
3159
3160 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3161 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3162 {
3163     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3164 }
3165
3166 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3167 {
3168     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3169 }
3170
3171 /// Deletes the content in the given range
3172 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3173 {
3174     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3175 }
3176
3177 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3178 {
3179     if (sm_availableFontNames.GetCount() == 0)
3180     {
3181         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3182         sm_availableFontNames.Sort();
3183     }
3184     return sm_availableFontNames;
3185 }
3186
3187 void wxRichTextCtrl::ClearAvailableFontNames()
3188 {
3189     sm_availableFontNames.Clear();
3190 }
3191
3192 #endif
3193     // wxUSE_RICHTEXT