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