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     wxTextAttr 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     wxTextAttr 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                 wxTextAttr 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             wxTextAttr 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     wxRect rect = line->GetRect();
1146     wxSize clientSize = GetClientSize();
1147
1148     return (rect.GetBottom() > startY) && (rect.GetTop() < (startY + clientSize.y));
1149 }
1150
1151 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1152 {
1153     m_caretPosition = position;
1154     m_caretAtLineStart = showAtLineStart;
1155 }
1156
1157 /// Move caret one visual step forward: this may mean setting a flag
1158 /// and keeping the same position if we're going from the end of one line
1159 /// to the start of the next, which may be the exact same caret position.
1160 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1161 {
1162     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1163
1164     // Only do the check if we're not at the end of the paragraph (where things work OK
1165     // anyway)
1166     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1167     {
1168         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1169
1170         if (line)
1171         {
1172             wxRichTextRange lineRange = line->GetAbsoluteRange();
1173
1174             // We're at the end of a line. See whether we need to
1175             // stay at the same actual caret position but change visual
1176             // position, or not.
1177             if (oldPosition == lineRange.GetEnd())
1178             {
1179                 if (m_caretAtLineStart)
1180                 {
1181                     // We're already at the start of the line, so actually move on now.
1182                     m_caretPosition = oldPosition + 1;
1183                     m_caretAtLineStart = false;
1184                 }
1185                 else
1186                 {
1187                     // We're showing at the end of the line, so keep to
1188                     // the same position but indicate that we're to show
1189                     // at the start of the next line.
1190                     m_caretPosition = oldPosition;
1191                     m_caretAtLineStart = true;
1192                 }
1193                 SetDefaultStyleToCursorStyle();
1194                 return;
1195             }
1196         }
1197     }
1198     m_caretPosition ++;
1199     SetDefaultStyleToCursorStyle();
1200 }
1201
1202 /// Move caret one visual step backward: this may mean setting a flag
1203 /// and keeping the same position if we're going from the end of one line
1204 /// to the start of the next, which may be the exact same caret position.
1205 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1206 {
1207     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1208
1209     // Only do the check if we're not at the start of the paragraph (where things work OK
1210     // anyway)
1211     if (para && (oldPosition != para->GetRange().GetStart()))
1212     {
1213         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1214
1215         if (line)
1216         {
1217             wxRichTextRange lineRange = line->GetAbsoluteRange();
1218
1219             // We're at the start of a line. See whether we need to
1220             // stay at the same actual caret position but change visual
1221             // position, or not.
1222             if (oldPosition == lineRange.GetStart())
1223             {
1224                 m_caretPosition = oldPosition-1;
1225                 m_caretAtLineStart = true;
1226                 return;
1227             }
1228             else if (oldPosition == lineRange.GetEnd())
1229             {
1230                 if (m_caretAtLineStart)
1231                 {
1232                     // We're at the start of the line, so keep the same caret position
1233                     // but clear the start-of-line flag.
1234                     m_caretPosition = oldPosition;
1235                     m_caretAtLineStart = false;
1236                 }
1237                 else
1238                 {
1239                     // We're showing at the end of the line, so go back
1240                     // to the previous character position.
1241                     m_caretPosition = oldPosition - 1;
1242                 }
1243                 SetDefaultStyleToCursorStyle();
1244                 return;
1245             }
1246         }
1247     }
1248     m_caretPosition --;
1249     SetDefaultStyleToCursorStyle();
1250 }
1251
1252 /// Move right
1253 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1254 {
1255     long endPos = GetBuffer().GetRange().GetEnd();
1256
1257     if (m_caretPosition + noPositions < endPos)
1258     {
1259         long oldPos = m_caretPosition;
1260         long newPos = m_caretPosition + noPositions;
1261
1262         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1263         if (!extendSel)
1264             SelectNone();
1265
1266         // Determine by looking at oldPos and m_caretPosition whether
1267         // we moved from the end of a line to the start of the next line, in which case
1268         // we want to adjust the caret position such that it is positioned at the
1269         // start of the next line, rather than jumping past the first character of the
1270         // line.
1271         if (noPositions == 1 && !extendSel)
1272             MoveCaretForward(oldPos);
1273         else
1274             SetCaretPosition(newPos);
1275
1276         PositionCaret();
1277         SetDefaultStyleToCursorStyle();
1278
1279         if (extendSel)
1280             Refresh(false);
1281         return true;
1282     }
1283     else
1284         return false;
1285 }
1286
1287 /// Move left
1288 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1289 {
1290     long startPos = -1;
1291
1292     if (m_caretPosition > startPos - noPositions + 1)
1293     {
1294         long oldPos = m_caretPosition;
1295         long newPos = m_caretPosition - noPositions;
1296         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1297         if (!extendSel)
1298             SelectNone();
1299
1300         if (noPositions == 1 && !extendSel)
1301             MoveCaretBack(oldPos);
1302         else
1303             SetCaretPosition(newPos);
1304
1305         PositionCaret();
1306         SetDefaultStyleToCursorStyle();
1307
1308         if (extendSel)
1309             Refresh(false);
1310         return true;
1311     }
1312     else
1313         return false;
1314 }
1315
1316 /// Move up
1317 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1318 {
1319     return MoveDown(- noLines, flags);
1320 }
1321
1322 /// Move up
1323 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1324 {
1325     if (!GetCaret())
1326         return false;
1327
1328     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1329     wxPoint pt = GetCaret()->GetPosition();
1330     long newLine = lineNumber + noLines;
1331
1332     if (lineNumber != -1)
1333     {
1334         if (noLines > 0)
1335         {
1336             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1337
1338             if (newLine > lastLine)
1339                 return false;
1340         }
1341         else
1342         {
1343             if (newLine < 0)
1344                 return false;
1345         }
1346     }
1347
1348     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1349     if (lineObj)
1350     {
1351         pt.y = lineObj->GetAbsolutePosition().y + 2;
1352     }
1353     else
1354         return false;
1355
1356     long newPos = 0;
1357     wxClientDC dc(this);
1358     PrepareDC(dc);
1359     dc.SetFont(GetFont());
1360
1361     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1362
1363     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1364     {
1365         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1366         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1367         // so we view the caret at the start of the line.
1368         bool caretLineStart = false;
1369         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1370         {
1371             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1372             wxRichTextRange lineRange;
1373             if (thisLine)
1374                 lineRange = thisLine->GetAbsoluteRange();
1375
1376             if (thisLine && (newPos-1) == lineRange.GetEnd())
1377             {
1378                 newPos --;
1379                 caretLineStart = true;
1380             }
1381             else
1382             {
1383                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1384                 if (para && para->GetRange().GetStart() == newPos)
1385                     newPos --;
1386             }
1387         }
1388
1389         long newSelEnd = newPos;
1390
1391         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1392         if (!extendSel)
1393             SelectNone();
1394
1395         SetCaretPosition(newPos, caretLineStart);
1396         PositionCaret();
1397         SetDefaultStyleToCursorStyle();
1398
1399         if (extendSel)
1400             Refresh(false);
1401         return true;
1402     }
1403
1404     return false;
1405 }
1406
1407 /// Move to the end of the paragraph
1408 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1409 {
1410     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1411     if (para)
1412     {
1413         long newPos = para->GetRange().GetEnd() - 1;
1414         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1415         if (!extendSel)
1416             SelectNone();
1417
1418         SetCaretPosition(newPos);
1419         PositionCaret();
1420         SetDefaultStyleToCursorStyle();
1421
1422         if (extendSel)
1423             Refresh(false);
1424         return true;
1425     }
1426
1427     return false;
1428 }
1429
1430 /// Move to the start of the paragraph
1431 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1432 {
1433     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1434     if (para)
1435     {
1436         long newPos = para->GetRange().GetStart() - 1;
1437         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1438         if (!extendSel)
1439             SelectNone();
1440
1441         SetCaretPosition(newPos);
1442         PositionCaret();
1443         SetDefaultStyleToCursorStyle();
1444
1445         if (extendSel)
1446             Refresh(false);
1447         return true;
1448     }
1449
1450     return false;
1451 }
1452
1453 /// Move to the end of the line
1454 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1455 {
1456     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1457
1458     if (line)
1459     {
1460         wxRichTextRange lineRange = line->GetAbsoluteRange();
1461         long newPos = lineRange.GetEnd();
1462         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1463         if (!extendSel)
1464             SelectNone();
1465
1466         SetCaretPosition(newPos);
1467         PositionCaret();
1468         SetDefaultStyleToCursorStyle();
1469
1470         if (extendSel)
1471             Refresh(false);
1472         return true;
1473     }
1474
1475     return false;
1476 }
1477
1478 /// Move to the start of the line
1479 bool wxRichTextCtrl::MoveToLineStart(int flags)
1480 {
1481     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1482     if (line)
1483     {
1484         wxRichTextRange lineRange = line->GetAbsoluteRange();
1485         long newPos = lineRange.GetStart()-1;
1486
1487         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1488         if (!extendSel)
1489             SelectNone();
1490
1491         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1492
1493         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1494         PositionCaret();
1495         SetDefaultStyleToCursorStyle();
1496
1497         if (extendSel)
1498             Refresh(false);
1499         return true;
1500     }
1501
1502     return false;
1503 }
1504
1505 /// Move to the start of the buffer
1506 bool wxRichTextCtrl::MoveHome(int flags)
1507 {
1508     if (m_caretPosition != -1)
1509     {
1510         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1511         if (!extendSel)
1512             SelectNone();
1513
1514         SetCaretPosition(-1);
1515         PositionCaret();
1516         SetDefaultStyleToCursorStyle();
1517
1518         if (extendSel)
1519             Refresh(false);
1520         return true;
1521     }
1522     else
1523         return false;
1524 }
1525
1526 /// Move to the end of the buffer
1527 bool wxRichTextCtrl::MoveEnd(int flags)
1528 {
1529     long endPos = GetBuffer().GetRange().GetEnd()-1;
1530
1531     if (m_caretPosition != endPos)
1532     {
1533         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1534         if (!extendSel)
1535             SelectNone();
1536
1537         SetCaretPosition(endPos);
1538         PositionCaret();
1539         SetDefaultStyleToCursorStyle();
1540
1541         if (extendSel)
1542             Refresh(false);
1543         return true;
1544     }
1545     else
1546         return false;
1547 }
1548
1549 /// Move noPages pages up
1550 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1551 {
1552     return PageDown(- noPages, flags);
1553 }
1554
1555 /// Move noPages pages down
1556 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1557 {
1558     // Calculate which line occurs noPages * screen height further down.
1559     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1560     if (line)
1561     {
1562         wxSize clientSize = GetClientSize();
1563         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1564
1565         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1566         if (newLine)
1567         {
1568             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1569             long pos = lineRange.GetStart()-1;
1570             if (pos != m_caretPosition)
1571             {
1572                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1573
1574                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1575                 if (!extendSel)
1576                     SelectNone();
1577
1578                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1579                 PositionCaret();
1580                 SetDefaultStyleToCursorStyle();
1581
1582                 if (extendSel)
1583                     Refresh(false);
1584                 return true;
1585             }
1586         }
1587     }
1588
1589     return false;
1590 }
1591
1592 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1593 {
1594     return str == wxT(" ") || str == wxT("\t");
1595 }
1596
1597 // Finds the caret position for the next word
1598 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1599 {
1600     long endPos = GetBuffer().GetRange().GetEnd();
1601
1602     if (direction > 0)
1603     {
1604         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1605
1606         // First skip current text to space
1607         while (i < endPos && i > -1)
1608         {
1609             // i is in character, not caret positions
1610             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1611             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1612             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1613             {
1614                 break;
1615             }
1616             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1617                 i += direction;
1618             else
1619             {
1620                 break;
1621             }
1622         }
1623         while (i < endPos && i > -1)
1624         {
1625             // i is in character, not caret positions
1626             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1627             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1628             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1629                 return wxMax(-1, i);
1630
1631             if (text.empty()) // End of paragraph, or maybe an image
1632                 return wxMax(-1, i - 1);
1633             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1634                 i += direction;
1635             else
1636             {
1637                 // Convert to caret position
1638                 return wxMax(-1, i - 1);
1639             }
1640         }
1641         if (i >= endPos)
1642             return endPos-1;
1643         return i-1;
1644     }
1645     else
1646     {
1647         long i = m_caretPosition;
1648
1649         // First skip white space
1650         while (i < endPos && i > -1)
1651         {
1652             // i is in character, not caret positions
1653             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1654             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1655
1656             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1657                 break;
1658             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1659                 i += direction;
1660             else
1661                 break;
1662         }
1663         // Next skip current text to space
1664         while (i < endPos && i > -1)
1665         {
1666             // i is in character, not caret positions
1667             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1668             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1669             if (line && line->GetAbsoluteRange().GetStart() == i)
1670                 return i-1;
1671
1672             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1673                 i += direction;
1674             else
1675             {
1676                 return i;
1677             }
1678         }
1679         if (i < -1)
1680             return -1;
1681         return i;
1682     }
1683 }
1684
1685 /// Move n words left
1686 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1687 {
1688     long pos = FindNextWordPosition(-1);
1689     if (pos != m_caretPosition)
1690     {
1691         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1692
1693         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1694         if (!extendSel)
1695             SelectNone();
1696
1697         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1698         PositionCaret();
1699         SetDefaultStyleToCursorStyle();
1700
1701         if (extendSel)
1702             Refresh(false);
1703         return true;
1704     }
1705
1706     return false;
1707 }
1708
1709 /// Move n words right
1710 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1711 {
1712     long pos = FindNextWordPosition(1);
1713     if (pos != m_caretPosition)
1714     {
1715         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1716
1717         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1718         if (!extendSel)
1719             SelectNone();
1720
1721         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1722         PositionCaret();
1723         SetDefaultStyleToCursorStyle();
1724
1725         if (extendSel)
1726             Refresh(false);
1727         return true;
1728     }
1729
1730     return false;
1731 }
1732
1733 /// Sizing
1734 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1735 {
1736     // Only do sizing optimization for large buffers
1737     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1738     {
1739         m_fullLayoutRequired = true;
1740         m_fullLayoutTime = wxGetLocalTimeMillis();
1741         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1742         LayoutContent(true /* onlyVisibleRect */);
1743     }
1744     else
1745         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1746
1747 #if wxRICHTEXT_BUFFERED_PAINTING
1748     RecreateBuffer();
1749 #endif
1750
1751     event.Skip();
1752 }
1753
1754
1755 /// Idle-time processing
1756 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1757 {
1758     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1759
1760     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1761     {
1762         m_fullLayoutRequired = false;
1763         m_fullLayoutTime = 0;
1764         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1765         ShowPosition(m_fullLayoutSavedPosition);
1766         Refresh(false);
1767     }
1768
1769     if (m_caretPositionForDefaultStyle != -2)
1770     {
1771         // If the caret position has changed, no longer reflect the default style
1772         // in the UI.
1773         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1774             m_caretPositionForDefaultStyle = -2;
1775     }
1776
1777     event.Skip();
1778 }
1779
1780 /// Scrolling
1781 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1782 {
1783     // Not used
1784     event.Skip();
1785 }
1786
1787 /// Set up scrollbars, e.g. after a resize
1788 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1789 {
1790     if (m_freezeCount)
1791         return;
1792
1793     if (GetBuffer().IsEmpty())
1794     {
1795         SetScrollbars(0, 0, 0, 0, 0, 0);
1796         return;
1797     }
1798
1799     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1800     // of pixels. See e.g. wxVScrolledWindow for ideas.
1801     int pixelsPerUnit = 5;
1802     wxSize clientSize = GetClientSize();
1803
1804     int maxHeight = GetBuffer().GetCachedSize().y;
1805
1806     // Round up so we have at least maxHeight pixels
1807     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1808
1809     int startX = 0, startY = 0;
1810     if (!atTop)
1811         GetViewStart(& startX, & startY);
1812
1813     int maxPositionX = 0; // wxMax(sz.x - clientSize.x, 0);
1814     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
1815
1816     // Move to previous scroll position if
1817     // possible
1818     SetScrollbars(0, pixelsPerUnit,
1819         0, unitsY,
1820         wxMin(maxPositionX, startX), wxMin(maxPositionY, startY));
1821 }
1822
1823 /// Paint the background
1824 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1825 {
1826     wxColour backgroundColour = GetBackgroundColour();
1827     if (!backgroundColour.Ok())
1828         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1829
1830     // Clear the background
1831     dc.SetBrush(wxBrush(backgroundColour));
1832     dc.SetPen(*wxTRANSPARENT_PEN);
1833     wxRect windowRect(GetClientSize());
1834     windowRect.x -= 2; windowRect.y -= 2;
1835     windowRect.width += 4; windowRect.height += 4;
1836
1837     // We need to shift the rectangle to take into account
1838     // scrolling. Converting device to logical coordinates.
1839     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1840     dc.DrawRectangle(windowRect);
1841 }
1842
1843 #if wxRICHTEXT_BUFFERED_PAINTING
1844 /// Recreate buffer bitmap if necessary
1845 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1846 {
1847     wxSize sz = size;
1848     if (sz == wxDefaultSize)
1849         sz = GetClientSize();
1850
1851     if (sz.x < 1 || sz.y < 1)
1852         return false;
1853
1854     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1855         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1856     return m_bufferBitmap.Ok();
1857 }
1858 #endif
1859
1860 // ----------------------------------------------------------------------------
1861 // file IO functions
1862 // ----------------------------------------------------------------------------
1863
1864 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
1865 {
1866     bool success = GetBuffer().LoadFile(filename, fileType);
1867     if (success)
1868         m_filename = filename;
1869
1870     DiscardEdits();
1871     SetInsertionPoint(0);
1872     LayoutContent();
1873     PositionCaret();
1874     SetupScrollbars(true);
1875     Refresh(false);
1876     wxTextCtrl::SendTextUpdatedEvent(this);
1877
1878     if (success)
1879         return true;
1880     else
1881     {
1882         wxLogError(_("File couldn't be loaded."));
1883
1884         return false;
1885     }
1886 }
1887
1888 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
1889 {
1890     if (GetBuffer().SaveFile(filename, fileType))
1891     {
1892         m_filename = filename;
1893
1894         DiscardEdits();
1895
1896         return true;
1897     }
1898
1899     wxLogError(_("The text couldn't be saved."));
1900
1901     return false;
1902 }
1903
1904 // ----------------------------------------------------------------------------
1905 // wxRichTextCtrl specific functionality
1906 // ----------------------------------------------------------------------------
1907
1908 /// Add a new paragraph of text to the end of the buffer
1909 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
1910 {
1911     return GetBuffer().AddParagraph(text);
1912 }
1913
1914 /// Add an image
1915 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
1916 {
1917     return GetBuffer().AddImage(image);
1918 }
1919
1920 // ----------------------------------------------------------------------------
1921 // selection and ranges
1922 // ----------------------------------------------------------------------------
1923
1924 void wxRichTextCtrl::SelectAll()
1925 {
1926     SetSelection(0, GetLastPosition()+1);
1927     m_selectionAnchor = -1;
1928 }
1929
1930 /// Select none
1931 void wxRichTextCtrl::SelectNone()
1932 {
1933     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
1934         SetSelection(-2, -2);
1935     m_selectionAnchor = -2;
1936 }
1937
1938 static bool wxIsWordDelimiter(const wxString& text)
1939 {
1940     return !text.IsEmpty() && !wxIsalnum(text[0]);
1941 }
1942
1943 /// Select the word at the given character position
1944 bool wxRichTextCtrl::SelectWord(long position)
1945 {
1946     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
1947         return false;
1948
1949     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
1950     if (!para)
1951         return false;
1952
1953     long positionStart = position;
1954     long positionEnd = position;
1955
1956     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
1957     {
1958         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
1959         if (wxIsWordDelimiter(text))
1960         {
1961             positionStart ++;
1962             break;
1963         }
1964     }
1965     if (positionStart < para->GetRange().GetStart())
1966         positionStart = para->GetRange().GetStart();
1967
1968     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
1969     {
1970         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
1971         if (wxIsWordDelimiter(text))
1972         {
1973             positionEnd --;
1974             break;
1975         }
1976     }
1977     if (positionEnd >= para->GetRange().GetEnd())
1978         positionEnd = para->GetRange().GetEnd();
1979
1980     SetSelection(positionStart, positionEnd+1);
1981
1982     if (positionStart >= 0)
1983     {
1984         MoveCaret(positionStart-1, true);
1985         SetDefaultStyleToCursorStyle();
1986     }
1987
1988     return true;
1989 }
1990
1991 wxString wxRichTextCtrl::GetStringSelection() const
1992 {
1993     long from, to;
1994     GetSelection(&from, &to);
1995
1996     return GetRange(from, to);
1997 }
1998
1999 // ----------------------------------------------------------------------------
2000 // hit testing
2001 // ----------------------------------------------------------------------------
2002
2003 wxTextCtrlHitTestResult
2004 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2005 {
2006     // implement in terms of the other overload as the native ports typically
2007     // can get the position and not (x, y) pair directly (although wxUniv
2008     // directly gets x and y -- and so overrides this method as well)
2009     long pos;
2010     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2011
2012     if ( rc != wxTE_HT_UNKNOWN )
2013     {
2014         PositionToXY(pos, x, y);
2015     }
2016
2017     return rc;
2018 }
2019
2020 wxTextCtrlHitTestResult
2021 wxRichTextCtrl::HitTest(const wxPoint& pt,
2022                         long * pos) const
2023 {
2024     wxClientDC dc((wxRichTextCtrl*) this);
2025     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2026
2027     // Buffer uses logical position (relative to start of buffer)
2028     // so convert
2029     wxPoint pt2 = GetLogicalPoint(pt);
2030
2031     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
2032
2033     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2034         return wxTE_HT_BEFORE;
2035     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2036         return wxTE_HT_BEYOND;
2037     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2038         return wxTE_HT_ON_TEXT;
2039
2040     return wxTE_HT_UNKNOWN;
2041 }
2042
2043 // ----------------------------------------------------------------------------
2044 // set/get the controls text
2045 // ----------------------------------------------------------------------------
2046
2047 wxString wxRichTextCtrl::GetValue() const
2048 {
2049     return GetBuffer().GetText();
2050 }
2051
2052 wxString wxRichTextCtrl::GetRange(long from, long to) const
2053 {
2054     // Public API for range is different from internals
2055     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2056 }
2057
2058 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2059 {
2060     Clear();
2061
2062     if (!value.IsEmpty())
2063     {
2064         // Remove empty paragraph
2065         GetBuffer().Clear();
2066         DoWriteText(value);
2067
2068         // for compatibility, don't move the cursor when doing SetValue()
2069         SetInsertionPoint(0);
2070     }
2071     else
2072     {
2073         // still send an event for consistency
2074         if (flags & SetValue_SendEvent)
2075             wxTextCtrl::SendTextUpdatedEvent(this);
2076     }
2077     DiscardEdits();
2078 }
2079
2080 void wxRichTextCtrl::WriteText(const wxString& value)
2081 {
2082     DoWriteText(value);
2083 }
2084
2085 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2086 {
2087     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2088
2089     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2090
2091     if ( flags & SetValue_SendEvent )
2092         wxTextCtrl::SendTextUpdatedEvent(this);
2093 }
2094
2095 void wxRichTextCtrl::AppendText(const wxString& text)
2096 {
2097     SetInsertionPointEnd();
2098
2099     WriteText(text);
2100 }
2101
2102 /// Write an image at the current insertion point
2103 bool wxRichTextCtrl::WriteImage(const wxImage& image, int bitmapType)
2104 {
2105     wxRichTextImageBlock imageBlock;
2106
2107     wxImage image2 = image;
2108     if (imageBlock.MakeImageBlock(image2, bitmapType))
2109         return WriteImage(imageBlock);
2110
2111     return false;
2112 }
2113
2114 bool wxRichTextCtrl::WriteImage(const wxString& filename, int bitmapType)
2115 {
2116     wxRichTextImageBlock imageBlock;
2117
2118     wxImage image;
2119     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2120         return WriteImage(imageBlock);
2121
2122     return false;
2123 }
2124
2125 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2126 {
2127     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2128 }
2129
2130 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, int bitmapType)
2131 {
2132     if (bitmap.Ok())
2133     {
2134         wxRichTextImageBlock imageBlock;
2135
2136         wxImage image = bitmap.ConvertToImage();
2137         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2138             return WriteImage(imageBlock);
2139     }
2140
2141     return false;
2142 }
2143
2144 /// Insert a newline (actually paragraph) at the current insertion point.
2145 bool wxRichTextCtrl::Newline()
2146 {
2147     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
2148 }
2149
2150 /// Insert a line break at the current insertion point.
2151 bool wxRichTextCtrl::LineBreak()
2152 {
2153     wxString text;
2154     text = wxRichTextLineBreakChar;
2155     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2156 }
2157
2158 // ----------------------------------------------------------------------------
2159 // Clipboard operations
2160 // ----------------------------------------------------------------------------
2161
2162 void wxRichTextCtrl::Copy()
2163 {
2164     if (CanCopy())
2165     {
2166         wxRichTextRange range = GetInternalSelectionRange();
2167         GetBuffer().CopyToClipboard(range);
2168     }
2169 }
2170
2171 void wxRichTextCtrl::Cut()
2172 {
2173     if (CanCut())
2174     {
2175         wxRichTextRange range = GetInternalSelectionRange();
2176         GetBuffer().CopyToClipboard(range);
2177
2178         DeleteSelectedContent();
2179         LayoutContent();
2180         Refresh(false);
2181     }
2182 }
2183
2184 void wxRichTextCtrl::Paste()
2185 {
2186     if (CanPaste())
2187     {
2188         BeginBatchUndo(_("Paste"));
2189
2190         long newPos = m_caretPosition;
2191         DeleteSelectedContent(& newPos);
2192
2193         GetBuffer().PasteFromClipboard(newPos);
2194
2195         EndBatchUndo();
2196     }
2197 }
2198
2199 void wxRichTextCtrl::DeleteSelection()
2200 {
2201     if (CanDeleteSelection())
2202     {
2203         DeleteSelectedContent();
2204     }
2205 }
2206
2207 bool wxRichTextCtrl::HasSelection() const
2208 {
2209     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2210 }
2211
2212 bool wxRichTextCtrl::CanCopy() const
2213 {
2214     // Can copy if there's a selection
2215     return HasSelection();
2216 }
2217
2218 bool wxRichTextCtrl::CanCut() const
2219 {
2220     return HasSelection() && IsEditable();
2221 }
2222
2223 bool wxRichTextCtrl::CanPaste() const
2224 {
2225     if ( !IsEditable() )
2226         return false;
2227
2228     return GetBuffer().CanPasteFromClipboard();
2229 }
2230
2231 bool wxRichTextCtrl::CanDeleteSelection() const
2232 {
2233     return HasSelection() && IsEditable();
2234 }
2235
2236
2237 // ----------------------------------------------------------------------------
2238 // Accessors
2239 // ----------------------------------------------------------------------------
2240
2241 void wxRichTextCtrl::SetEditable(bool editable)
2242 {
2243     m_editable = editable;
2244 }
2245
2246 void wxRichTextCtrl::SetInsertionPoint(long pos)
2247 {
2248     SelectNone();
2249
2250     m_caretPosition = pos - 1;
2251 }
2252
2253 void wxRichTextCtrl::SetInsertionPointEnd()
2254 {
2255     long pos = GetLastPosition();
2256     SetInsertionPoint(pos);
2257 }
2258
2259 long wxRichTextCtrl::GetInsertionPoint() const
2260 {
2261     return m_caretPosition+1;
2262 }
2263
2264 wxTextPos wxRichTextCtrl::GetLastPosition() const
2265 {
2266     return GetBuffer().GetRange().GetEnd();
2267 }
2268
2269 // If the return values from and to are the same, there is no
2270 // selection.
2271 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2272 {
2273     *from = m_selectionRange.GetStart();
2274     *to = m_selectionRange.GetEnd();
2275     if ((*to) != -1 && (*to) != -2)
2276         (*to) ++;
2277 }
2278
2279 bool wxRichTextCtrl::IsEditable() const
2280 {
2281     return m_editable;
2282 }
2283
2284 // ----------------------------------------------------------------------------
2285 // selection
2286 // ----------------------------------------------------------------------------
2287
2288 void wxRichTextCtrl::SetSelection(long from, long to)
2289 {
2290     // if from and to are both -1, it means (in wxWidgets) that all text should
2291     // be selected.
2292     if ( (from == -1) && (to == -1) )
2293     {
2294         from = 0;
2295         to = GetLastPosition()+1;
2296     }
2297
2298     DoSetSelection(from, to);
2299 }
2300
2301 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2302 {
2303     m_selectionAnchor = from;
2304     m_selectionRange.SetRange(from, to-1);
2305     if (from > -2)
2306         m_caretPosition = from-1;
2307
2308     Refresh(false);
2309     PositionCaret();
2310 }
2311
2312 // ----------------------------------------------------------------------------
2313 // Editing
2314 // ----------------------------------------------------------------------------
2315
2316 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2317                              const wxString& value)
2318 {
2319     BeginBatchUndo(_("Replace"));
2320
2321     DeleteSelectedContent();
2322
2323     DoWriteText(value, SetValue_SelectionOnly);
2324
2325     EndBatchUndo();
2326 }
2327
2328 void wxRichTextCtrl::Remove(long from, long to)
2329 {
2330     SelectNone();
2331
2332     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to), this);
2333
2334     LayoutContent();
2335     if (!IsFrozen())
2336         Refresh(false);
2337 }
2338
2339 bool wxRichTextCtrl::IsModified() const
2340 {
2341     return m_buffer.IsModified();
2342 }
2343
2344 void wxRichTextCtrl::MarkDirty()
2345 {
2346     m_buffer.Modify(true);
2347 }
2348
2349 void wxRichTextCtrl::DiscardEdits()
2350 {
2351     m_caretPositionForDefaultStyle = -2;
2352     m_buffer.Modify(false);
2353     m_buffer.GetCommandProcessor()->ClearCommands();
2354 }
2355
2356 int wxRichTextCtrl::GetNumberOfLines() const
2357 {
2358     return GetBuffer().GetParagraphCount();
2359 }
2360
2361 // ----------------------------------------------------------------------------
2362 // Positions <-> coords
2363 // ----------------------------------------------------------------------------
2364
2365 long wxRichTextCtrl::XYToPosition(long x, long y) const
2366 {
2367     return GetBuffer().XYToPosition(x, y);
2368 }
2369
2370 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2371 {
2372     return GetBuffer().PositionToXY(pos, x, y);
2373 }
2374
2375 // ----------------------------------------------------------------------------
2376 //
2377 // ----------------------------------------------------------------------------
2378
2379 void wxRichTextCtrl::ShowPosition(long pos)
2380 {
2381     if (!IsPositionVisible(pos))
2382         ScrollIntoView(pos-1, WXK_DOWN);
2383 }
2384
2385 int wxRichTextCtrl::GetLineLength(long lineNo) const
2386 {
2387     return GetBuffer().GetParagraphLength(lineNo);
2388 }
2389
2390 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2391 {
2392     return GetBuffer().GetParagraphText(lineNo);
2393 }
2394
2395 // ----------------------------------------------------------------------------
2396 // Undo/redo
2397 // ----------------------------------------------------------------------------
2398
2399 void wxRichTextCtrl::Undo()
2400 {
2401     if (CanUndo())
2402     {
2403         GetCommandProcessor()->Undo();
2404     }
2405 }
2406
2407 void wxRichTextCtrl::Redo()
2408 {
2409     if (CanRedo())
2410     {
2411         GetCommandProcessor()->Redo();
2412     }
2413 }
2414
2415 bool wxRichTextCtrl::CanUndo() const
2416 {
2417     return GetCommandProcessor()->CanUndo();
2418 }
2419
2420 bool wxRichTextCtrl::CanRedo() const
2421 {
2422     return GetCommandProcessor()->CanRedo();
2423 }
2424
2425 // ----------------------------------------------------------------------------
2426 // implementation details
2427 // ----------------------------------------------------------------------------
2428
2429 void wxRichTextCtrl::Command(wxCommandEvent& event)
2430 {
2431     SetValue(event.GetString());
2432     GetEventHandler()->ProcessEvent(event);
2433 }
2434
2435 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2436 {
2437     // By default, load the first file into the text window.
2438     if (event.GetNumberOfFiles() > 0)
2439     {
2440         LoadFile(event.GetFiles()[0]);
2441     }
2442 }
2443
2444 wxSize wxRichTextCtrl::DoGetBestSize() const
2445 {
2446     return wxSize(10, 10);
2447 }
2448
2449 // ----------------------------------------------------------------------------
2450 // standard handlers for standard edit menu events
2451 // ----------------------------------------------------------------------------
2452
2453 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2454 {
2455     Cut();
2456 }
2457
2458 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2459 {
2460     DeleteSelection();
2461 }
2462
2463 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2464 {
2465     Copy();
2466 }
2467
2468 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2469 {
2470     Paste();
2471 }
2472
2473 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2474 {
2475     Undo();
2476 }
2477
2478 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2479 {
2480     Redo();
2481 }
2482
2483 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2484 {
2485     event.Enable( CanCut() );
2486 }
2487
2488 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2489 {
2490     event.Enable( CanCopy() );
2491 }
2492
2493 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2494 {
2495     event.Enable( CanDeleteSelection() );
2496 }
2497
2498 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2499 {
2500     event.Enable( CanPaste() );
2501 }
2502
2503 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2504 {
2505     event.Enable( CanUndo() );
2506     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2507 }
2508
2509 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2510 {
2511     event.Enable( CanRedo() );
2512     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2513 }
2514
2515 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2516 {
2517     SelectAll();
2518 }
2519
2520 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2521 {
2522     event.Enable(GetLastPosition() > 0);
2523 }
2524
2525 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2526 {
2527     if (event.GetEventObject() != this)
2528     {
2529         event.Skip();
2530         return;
2531     }
2532
2533     if (!m_contextMenu)
2534     {
2535         m_contextMenu = new wxMenu;
2536         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2537         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2538         m_contextMenu->AppendSeparator();
2539         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2540         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2541         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2542         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2543         m_contextMenu->AppendSeparator();
2544         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2545     }
2546     PopupMenu(m_contextMenu);
2547     return;
2548 }
2549
2550 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2551 {
2552     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttr(style));
2553 }
2554
2555 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxTextAttr& style)
2556 {
2557     return GetBuffer().SetStyle(range.ToInternal(), style);
2558 }
2559
2560 // extended style setting operation with flags including:
2561 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2562 // see richtextbuffer.h for more details.
2563
2564 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttr& style, int flags)
2565 {
2566     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2567 }
2568
2569 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2570 {
2571     return GetBuffer().SetDefaultStyle(wxTextAttr(style));
2572 }
2573
2574 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2575 {
2576     return GetBuffer().GetDefaultStyle();
2577 }
2578
2579 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2580 {
2581     return GetBuffer().GetStyle(position, style);
2582 }
2583
2584 // get the common set of styles for the range
2585 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttr& style)
2586 {
2587     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2588 }
2589
2590 /// Get the content (uncombined) attributes for this position.
2591 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2592 {
2593     return GetBuffer().GetUncombinedStyle(position, style);
2594 }
2595
2596 /// Set font, and also the buffer attributes
2597 bool wxRichTextCtrl::SetFont(const wxFont& font)
2598 {
2599     wxControl::SetFont(font);
2600
2601     wxTextAttr attr = GetBuffer().GetAttributes();
2602     attr.SetFont(font);
2603     GetBuffer().SetBasicStyle(attr);
2604
2605     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2606     Refresh(false);
2607
2608     return true;
2609 }
2610
2611 /// Transform logical to physical
2612 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2613 {
2614     wxPoint pt;
2615     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2616
2617     return pt;
2618 }
2619
2620 /// Transform physical to logical
2621 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2622 {
2623     wxPoint pt;
2624     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2625
2626     return pt;
2627 }
2628
2629 /// Position the caret
2630 void wxRichTextCtrl::PositionCaret()
2631 {
2632     if (!GetCaret())
2633         return;
2634
2635     //wxLogDebug(wxT("PositionCaret"));
2636
2637     wxRect caretRect;
2638     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2639     {
2640         wxPoint newPt = caretRect.GetPosition();
2641         wxSize newSz = caretRect.GetSize();
2642         wxPoint pt = GetPhysicalPoint(newPt);
2643         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
2644         {
2645             GetCaret()->Move(pt);
2646             GetCaret()->SetSize(newSz);
2647         }
2648     }
2649 }
2650
2651 /// Get the caret height and position for the given character position
2652 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2653 {
2654     wxClientDC dc(this);
2655     dc.SetFont(GetFont());
2656
2657     PrepareDC(dc);
2658
2659     wxPoint pt;
2660     int height = 0;
2661
2662     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2663     {
2664         // Caret height can't be zero
2665         if (height == 0)
2666             height = dc.GetCharHeight();
2667
2668         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2669         return true;
2670     }
2671
2672     return false;
2673 }
2674
2675 /// Gets the line for the visible caret position. If the caret is
2676 /// shown at the very end of the line, it means the next character is actually
2677 /// on the following line. So let's get the line we're expecting to find
2678 /// if this is the case.
2679 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2680 {
2681     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2682     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2683     if (line)
2684     {
2685         wxRichTextRange lineRange = line->GetAbsoluteRange();
2686         if (caretPosition == lineRange.GetStart()-1 &&
2687             (para->GetRange().GetStart() != lineRange.GetStart()))
2688         {
2689             if (!m_caretAtLineStart)
2690                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2691         }
2692     }
2693     return line;
2694 }
2695
2696
2697 /// Move the caret to the given character position
2698 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2699 {
2700     if (GetBuffer().GetDirty())
2701         LayoutContent();
2702
2703     if (pos <= GetBuffer().GetRange().GetEnd())
2704     {
2705         SetCaretPosition(pos, showAtLineStart);
2706
2707         PositionCaret();
2708
2709         return true;
2710     }
2711     else
2712         return false;
2713 }
2714
2715 /// Layout the buffer: which we must do before certain operations, such as
2716 /// setting the caret position.
2717 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2718 {
2719     if (GetBuffer().GetDirty() || onlyVisibleRect)
2720     {
2721         wxRect availableSpace(GetClientSize());
2722         if (availableSpace.width == 0)
2723             availableSpace.width = 10;
2724         if (availableSpace.height == 0)
2725             availableSpace.height = 10;
2726
2727         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2728         if (onlyVisibleRect)
2729         {
2730             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2731             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2732         }
2733
2734         wxClientDC dc(this);
2735         dc.SetFont(GetFont());
2736
2737         PrepareDC(dc);
2738
2739         GetBuffer().Defragment();
2740         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2741         GetBuffer().Layout(dc, availableSpace, flags);
2742         GetBuffer().SetDirty(false);
2743
2744         if (!IsFrozen())
2745             SetupScrollbars();
2746     }
2747
2748     return true;
2749 }
2750
2751 /// Is all of the selection bold?
2752 bool wxRichTextCtrl::IsSelectionBold()
2753 {
2754     if (HasSelection())
2755     {
2756         wxTextAttr attr;
2757         wxRichTextRange range = GetSelectionRange();
2758         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2759         attr.SetFontWeight(wxBOLD);
2760
2761         return HasCharacterAttributes(range, attr);
2762     }
2763     else
2764     {
2765         // If no selection, then we need to combine current style with default style
2766         // to see what the effect would be if we started typing.
2767         wxTextAttr attr;
2768         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2769
2770         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2771         if (GetStyle(pos, attr))
2772         {
2773             if (IsDefaultStyleShowing())
2774                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2775             return attr.GetFontWeight() == wxBOLD;
2776         }
2777     }
2778     return false;
2779 }
2780
2781 /// Is all of the selection italics?
2782 bool wxRichTextCtrl::IsSelectionItalics()
2783 {
2784     if (HasSelection())
2785     {
2786         wxRichTextRange range = GetSelectionRange();
2787         wxTextAttr attr;
2788         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2789         attr.SetFontStyle(wxITALIC);
2790
2791         return HasCharacterAttributes(range, attr);
2792     }
2793     else
2794     {
2795         // If no selection, then we need to combine current style with default style
2796         // to see what the effect would be if we started typing.
2797         wxTextAttr attr;
2798         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2799
2800         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2801         if (GetStyle(pos, attr))
2802         {
2803             if (IsDefaultStyleShowing())
2804                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2805             return attr.GetFontStyle() == wxITALIC;
2806         }
2807     }
2808     return false;
2809 }
2810
2811 /// Is all of the selection underlined?
2812 bool wxRichTextCtrl::IsSelectionUnderlined()
2813 {
2814     if (HasSelection())
2815     {
2816         wxRichTextRange range = GetSelectionRange();
2817         wxTextAttr attr;
2818         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2819         attr.SetFontUnderlined(true);
2820
2821         return HasCharacterAttributes(range, attr);
2822     }
2823     else
2824     {
2825         // If no selection, then we need to combine current style with default style
2826         // to see what the effect would be if we started typing.
2827         wxTextAttr attr;
2828         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2829         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2830
2831         if (GetStyle(pos, attr))
2832         {
2833             if (IsDefaultStyleShowing())
2834                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2835             return attr.GetFontUnderlined();
2836         }
2837     }
2838     return false;
2839 }
2840
2841 /// Apply bold to the selection
2842 bool wxRichTextCtrl::ApplyBoldToSelection()
2843 {
2844     wxTextAttr attr;
2845     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2846     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
2847
2848     if (HasSelection())
2849         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2850     else
2851         SetAndShowDefaultStyle(attr);
2852     return true;
2853 }
2854
2855 /// Apply italic to the selection
2856 bool wxRichTextCtrl::ApplyItalicToSelection()
2857 {
2858     wxTextAttr attr;
2859     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2860     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
2861
2862     if (HasSelection())
2863         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2864     else
2865         SetAndShowDefaultStyle(attr);
2866     return true;
2867 }
2868
2869 /// Apply underline to the selection
2870 bool wxRichTextCtrl::ApplyUnderlineToSelection()
2871 {
2872     wxTextAttr attr;
2873     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2874     attr.SetFontUnderlined(!IsSelectionUnderlined());
2875
2876     if (HasSelection())
2877         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2878     else
2879         SetAndShowDefaultStyle(attr);
2880     return true;
2881 }
2882
2883 /// Is all of the selection aligned according to the specified flag?
2884 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
2885 {
2886     wxRichTextRange range;
2887     if (HasSelection())
2888         range = GetSelectionRange();
2889     else
2890         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
2891
2892     wxTextAttr attr;
2893     attr.SetAlignment(alignment);
2894
2895     return HasParagraphAttributes(range, attr);
2896 }
2897
2898 /// Apply alignment to the selection
2899 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
2900 {
2901     wxTextAttr attr;
2902     attr.SetAlignment(alignment);
2903     if (HasSelection())
2904         return SetStyle(GetSelectionRange(), attr);
2905     else
2906     {
2907         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
2908         if (para)
2909             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
2910     }
2911     return true;
2912 }
2913
2914 /// Apply a named style to the selection
2915 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
2916 {
2917     // Flags are defined within each definition, so only certain
2918     // attributes are applied.
2919     wxTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
2920
2921     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE;
2922
2923     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
2924     {
2925         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2926
2927         wxRichTextRange range;
2928
2929         if (HasSelection())
2930             range = GetSelectionRange();
2931         else
2932         {
2933             long pos = GetAdjustedCaretPosition(GetCaretPosition());
2934             range = wxRichTextRange(pos, pos+1);
2935         }
2936
2937         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
2938     }
2939
2940     // Make sure the attr has the style name
2941     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
2942     {
2943         attr.SetParagraphStyleName(def->GetName());
2944
2945         // If applying a paragraph style, we only want the paragraph nodes to adopt these
2946         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
2947         // to change its style independently.
2948         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2949     }
2950     else
2951         attr.SetCharacterStyleName(def->GetName());
2952
2953     if (HasSelection())
2954         return SetStyleEx(GetSelectionRange(), attr, flags);
2955     else
2956     {
2957         SetAndShowDefaultStyle(attr);
2958         return true;
2959     }
2960 }
2961
2962 /// Apply the style sheet to the buffer, for example if the styles have changed.
2963 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
2964 {
2965     if (!styleSheet)
2966         styleSheet = GetBuffer().GetStyleSheet();
2967     if (!styleSheet)
2968         return false;
2969
2970     if (GetBuffer().ApplyStyleSheet(styleSheet))
2971     {
2972         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2973         Refresh(false);
2974         return true;
2975     }
2976     else
2977         return false;
2978 }
2979
2980 /// Sets the default style to the style under the cursor
2981 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
2982 {
2983     wxTextAttr attr;
2984     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
2985
2986     // If at the start of a paragraph, use the next position.
2987     long pos = GetAdjustedCaretPosition(GetCaretPosition());
2988
2989     if (GetUncombinedStyle(pos, attr))
2990     {
2991         SetDefaultStyle(attr);
2992         return true;
2993     }
2994
2995     return false;
2996 }
2997
2998 /// Returns the first visible position in the current view
2999 long wxRichTextCtrl::GetFirstVisiblePosition() const
3000 {
3001     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3002     if (line)
3003         return line->GetAbsoluteRange().GetStart();
3004     else
3005         return 0;
3006 }
3007
3008 /// Get the first visible point in the window
3009 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3010 {
3011     int ppuX, ppuY;
3012     int startXUnits, startYUnits;
3013
3014     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3015     GetViewStart(& startXUnits, & startYUnits);
3016
3017     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3018 }
3019
3020 /// The adjusted caret position is the character position adjusted to take
3021 /// into account whether we're at the start of a paragraph, in which case
3022 /// style information should be taken from the next position, not current one.
3023 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3024 {
3025     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3026
3027     if (para && (caretPos+1 == para->GetRange().GetStart()))
3028         caretPos ++;
3029     return caretPos;
3030 }
3031
3032 /// Get/set the selection range in character positions. -1, -1 means no selection.
3033 /// The range is in API convention, i.e. a single character selection is denoted
3034 /// by (n, n+1)
3035 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3036 {
3037     wxRichTextRange range = GetInternalSelectionRange();
3038     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3039         range.SetEnd(range.GetEnd() + 1);
3040     return range;
3041 }
3042
3043 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3044 {
3045     wxRichTextRange range1(range);
3046     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3047         range1.SetEnd(range1.GetEnd() - 1);
3048
3049     wxASSERT( range1.GetStart() > range1.GetEnd() );
3050
3051     SetInternalSelectionRange(range1);
3052 }
3053
3054 /// Set list style
3055 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3056 {
3057     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3058 }
3059
3060 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3061 {
3062     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3063 }
3064
3065 /// Clear list for given range
3066 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3067 {
3068     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3069 }
3070
3071 /// Number/renumber any list elements in the given range
3072 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3073 {
3074     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3075 }
3076
3077 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3078 {
3079     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3080 }
3081
3082 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3083 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3084 {
3085     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3086 }
3087
3088 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3089 {
3090     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3091 }
3092
3093 /// Deletes the content in the given range
3094 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3095 {
3096     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3097 }
3098
3099 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3100 {
3101     if (sm_availableFontNames.GetCount() == 0)
3102     {
3103         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3104         sm_availableFontNames.Sort();
3105     }
3106     return sm_availableFontNames;
3107 }
3108
3109 void wxRichTextCtrl::ClearAvailableFontNames()
3110 {
3111     sm_availableFontNames.Clear();
3112 }
3113
3114 #endif
3115     // wxUSE_RICHTEXT