src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richtextctrl.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/timer.h"
  30 #include "wx/textfile.h"
  31 #include "wx/ffile.h"
  32 #include "wx/filename.h"
  33 #include "wx/dcbuffer.h"
  34 #include "wx/arrimpl.cpp"
  35 #include "wx/fontenum.h"
  36 #include "wx/accel.h"
  37
  38 // DLL options compatibility check:
  39 #include "wx/app.h"
  40 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  41
  42 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_LEFT_CLICK, wxRichTextEvent );
  43 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK, wxRichTextEvent );
  44 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK, wxRichTextEvent );
  45 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK, wxRichTextEvent );
  46 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_RETURN, wxRichTextEvent );
  47 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CHARACTER, wxRichTextEvent );
  48 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_DELETE, wxRichTextEvent );
  49
  50 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING, wxRichTextEvent );
  51 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED, wxRichTextEvent );
  52 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING, wxRichTextEvent );
  53 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED, wxRichTextEvent );
  54
  55 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED, wxRichTextEvent );
  56 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED, wxRichTextEvent );
  57 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED, wxRichTextEvent );
  58 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED, wxRichTextEvent );
  59 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_BUFFER_RESET, wxRichTextEvent );
  60 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_FOCUS_OBJECT_CHANGED, wxRichTextEvent );
  61
  62 #if wxRICHTEXT_USE_OWN_CARET
  63
  64 /*!
  65  * wxRichTextCaret
  66  *
  67  * This implements a non-flashing cursor in case there
  68  * are platform-specific problems with the generic caret.
  69  * wxRICHTEXT_USE_OWN_CARET is set in richtextbuffer.h.
  70  */
  71
  72 class wxRichTextCaret;
  73 class wxRichTextCaretTimer: public wxTimer
  74 {
  75   public:
  76     wxRichTextCaretTimer(wxRichTextCaret* caret)
  77     {
  78         m_caret = caret;
  79     }
  80     virtual void Notify();
  81     wxRichTextCaret* m_caret;
  82 };
  83
  84 class wxRichTextCaret: public wxCaret
  85 {
  86 public:
  87     // ctors
  88     // -----
  89         // default - use Create()
  90     wxRichTextCaret(): m_timer(this)  { Init(); }
  91         // creates a block caret associated with the given window
  92     wxRichTextCaret(wxRichTextCtrl *window, int width, int height)
  93         : wxCaret(window, width, height), m_timer(this) { Init(); m_richTextCtrl = window; }
  94     wxRichTextCaret(wxRichTextCtrl *window, const wxSize& size)
  95         : wxCaret(window, size), m_timer(this) { Init(); m_richTextCtrl = window; }
  96
  97     virtual ~wxRichTextCaret();
  98
  99     // implementation
 100     // --------------
 101
 102     // called by wxWindow (not using the event tables)
 103     virtual void OnSetFocus();
 104     virtual void OnKillFocus();
 105
 106     // draw the caret on the given DC
 107     void DoDraw(wxDC *dc);
 108
 109     // get the visible count
 110     int GetVisibleCount() const { return m_countVisible; }
 111
 112     // delay repositioning
 113     bool GetNeedsUpdate() const { return m_needsUpdate; }
 114     void SetNeedsUpdate(bool needsUpdate = true ) { m_needsUpdate = needsUpdate; }
 115
 116     void Notify();
 117
 118 protected:
 119     virtual void DoShow();
 120     virtual void DoHide();
 121     virtual void DoMove();
 122     virtual void DoSize();
 123
 124     // refresh the caret
 125     void Refresh();
 126
 127 private:
 128     void Init();
 129
 130     int           m_xOld,
 131                   m_yOld;
 132     bool          m_hasFocus;       // true => our window has focus
 133     bool          m_needsUpdate;    // must be repositioned
 134     bool          m_flashOn;
 135     wxRichTextCaretTimer m_timer;
 136     wxRichTextCtrl* m_richTextCtrl;
 137 };
 138 #endif
 139
 140 IMPLEMENT_DYNAMIC_CLASS( wxRichTextCtrl, wxControl )
 141
 142 IMPLEMENT_DYNAMIC_CLASS( wxRichTextEvent, wxNotifyEvent )
 143
 144 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
 145     EVT_PAINT(wxRichTextCtrl::OnPaint)
 146     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
 147     EVT_IDLE(wxRichTextCtrl::OnIdle)
 148     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
 149     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
 150     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
 151     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
 152     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
 153     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
 154     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
 155     EVT_CHAR(wxRichTextCtrl::OnChar)
 156     EVT_KEY_DOWN(wxRichTextCtrl::OnChar)
 157     EVT_SIZE(wxRichTextCtrl::OnSize)
 158     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
 159     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
 160     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
 161     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
 162     EVT_SYS_COLOUR_CHANGED(wxRichTextCtrl::OnSysColourChanged)
 163
 164     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
 165     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
 166
 167     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
 168     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
 169
 170     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
 171     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
 172
 173     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
 174     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
 175
 176     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
 177     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
 178
 179     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
 180     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
 181
 182     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
 183     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 184
 185     EVT_MENU(wxID_RICHTEXT_PROPERTIES1, wxRichTextCtrl::OnProperties)
 186     EVT_UPDATE_UI(wxID_RICHTEXT_PROPERTIES1, wxRichTextCtrl::OnUpdateProperties)
 187
 188     EVT_MENU(wxID_RICHTEXT_PROPERTIES2, wxRichTextCtrl::OnProperties)
 189     EVT_UPDATE_UI(wxID_RICHTEXT_PROPERTIES2, wxRichTextCtrl::OnUpdateProperties)
 190
 191     EVT_MENU(wxID_RICHTEXT_PROPERTIES3, wxRichTextCtrl::OnProperties)
 192     EVT_UPDATE_UI(wxID_RICHTEXT_PROPERTIES3, wxRichTextCtrl::OnUpdateProperties)
 193
 194 END_EVENT_TABLE()
 195
 196 /*!
 197  * wxRichTextCtrl
 198  */
 199
 200 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 201
 202 wxRichTextCtrl::wxRichTextCtrl()
 203               : wxScrollHelper(this)
 204 {
 205     Init();
 206 }
 207
 208 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 209                                wxWindowID id,
 210                                const wxString& value,
 211                                const wxPoint& pos,
 212                                const wxSize& size,
 213                                long style,
 214                                const wxValidator& validator,
 215                                const wxString& name)
 216               : wxScrollHelper(this)
 217 {
 218     Init();
 219     Create(parent, id, value, pos, size, style, validator, name);
 220 }
 221
 222 /// Creation
 223 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 224                              const wxValidator& validator, const wxString& name)
 225 {
 226     style |= wxVSCROLL;
 227
 228     if (!wxControl::Create(parent, id, pos, size,
 229                            style|wxFULL_REPAINT_ON_RESIZE,
 230                            validator, name))
 231         return false;
 232
 233     if (!GetFont().Ok())
 234     {
 235         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 236     }
 237
 238     // No physical scrolling, so we can preserve margins
 239     EnableScrolling(false, false);
 240
 241     if (style & wxTE_READONLY)
 242         SetEditable(false);
 243
 244     // The base attributes must all have default values
 245     wxRichTextAttr attributes;
 246     attributes.SetFont(GetFont());
 247     attributes.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
 248     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 249     attributes.SetLineSpacing(10);
 250     attributes.SetParagraphSpacingAfter(10);
 251     attributes.SetParagraphSpacingBefore(0);
 252
 253     SetBasicStyle(attributes);
 254
 255     int margin = 5;
 256     SetMargins(margin, margin);
 257
 258     // The default attributes will be merged with base attributes, so
 259     // can be empty to begin with
 260     wxRichTextAttr defaultAttributes;
 261     SetDefaultStyle(defaultAttributes);
 262
 263     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 264     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 265
 266     GetBuffer().Reset();
 267     GetBuffer().SetRichTextCtrl(this);
 268
 269 #if wxRICHTEXT_USE_OWN_CARET
 270     SetCaret(new wxRichTextCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 271 #else
 272     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 273 #endif
 274
 275     // Tell the sizers to use the given or best size
 276     SetInitialSize(size);
 277
 278 #if wxRICHTEXT_BUFFERED_PAINTING
 279     // Create a buffer
 280     RecreateBuffer(size);
 281 #endif
 282
 283     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 284     m_urlCursor = wxCursor(wxCURSOR_HAND);
 285
 286     SetCursor(m_textCursor);
 287
 288     if (!value.IsEmpty())
 289         SetValue(value);
 290
 291     GetBuffer().AddEventHandler(this);
 292
 293     // Accelerators
 294     wxAcceleratorEntry entries[6];
 295
 296     entries[0].Set(wxACCEL_CMD,   (int) 'C',       wxID_COPY);
 297     entries[1].Set(wxACCEL_CMD,   (int) 'X',       wxID_CUT);
 298     entries[2].Set(wxACCEL_CMD,   (int) 'V',       wxID_PASTE);
 299     entries[3].Set(wxACCEL_CMD,   (int) 'A',       wxID_SELECTALL);
 300     entries[4].Set(wxACCEL_CMD,   (int) 'Z',       wxID_UNDO);
 301     entries[5].Set(wxACCEL_CMD,   (int) 'Y',       wxID_REDO);
 302
 303     wxAcceleratorTable accel(6, entries);
 304     SetAcceleratorTable(accel);
 305
 306     m_contextMenu = new wxMenu;
 307     m_contextMenu->Append(wxID_UNDO, _("&Undo"));
 308     m_contextMenu->Append(wxID_REDO, _("&Redo"));
 309     m_contextMenu->AppendSeparator();
 310     m_contextMenu->Append(wxID_CUT, _("Cu&t"));
 311     m_contextMenu->Append(wxID_COPY, _("&Copy"));
 312     m_contextMenu->Append(wxID_PASTE, _("&Paste"));
 313     m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
 314     m_contextMenu->AppendSeparator();
 315     m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
 316     m_contextMenu->AppendSeparator();
 317     m_contextMenu->Append(wxID_RICHTEXT_PROPERTIES1, _("&Properties"));
 318
 319     return true;
 320 }
 321
 322 wxRichTextCtrl::~wxRichTextCtrl()
 323 {
 324     SetFocusObject(& GetBuffer(), false);
 325     GetBuffer().RemoveEventHandler(this);
 326
 327     delete m_contextMenu;
 328 }
 329
 330 /// Member initialisation
 331 void wxRichTextCtrl::Init()
 332 {
 333     m_contextMenu = NULL;
 334     m_caret = NULL;
 335     m_caretPosition = -1;
 336     m_selectionAnchor = -2;
 337     m_selectionAnchorObject = NULL;
 338     m_selectionState = wxRichTextCtrlSelectionState_Normal;
 339     m_editable = true;
 340     m_caretAtLineStart = false;
 341     m_dragging = false;
 342     m_fullLayoutRequired = false;
 343     m_fullLayoutTime = 0;
 344     m_fullLayoutSavedPosition = 0;
 345     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 346     m_caretPositionForDefaultStyle = -2;
 347     m_focusObject = & m_buffer;
 348 }
 349
 350 void wxRichTextCtrl::DoThaw()
 351 {
 352     if (GetBuffer().IsDirty())
 353         LayoutContent();
 354     else
 355         SetupScrollbars();
 356
 357     wxWindow::DoThaw();
 358 }
 359
 360 /// Clear all text
 361 void wxRichTextCtrl::Clear()
 362 {
 363     if (GetFocusObject() == & GetBuffer())
 364     {
 365         m_buffer.ResetAndClearCommands();
 366         m_buffer.Invalidate(wxRICHTEXT_ALL);
 367     }
 368     else
 369     {
 370         GetFocusObject()->Reset();
 371     }
 372
 373     m_caretPosition = -1;
 374     m_caretPositionForDefaultStyle = -2;
 375     m_caretAtLineStart = false;
 376     m_selection.Reset();
 377     m_selectionState = wxRichTextCtrlSelectionState_Normal;
 378
 379     Scroll(0,0);
 380
 381     if (!IsFrozen())
 382     {
 383         LayoutContent();
 384         Refresh(false);
 385     }
 386
 387     wxTextCtrl::SendTextUpdatedEvent(this);
 388 }
 389
 390 /// Painting
 391 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 392 {
 393 #if !wxRICHTEXT_USE_OWN_CARET
 394     if (GetCaret() && !IsFrozen())
 395         GetCaret()->Hide();
 396 #endif
 397
 398     {
 399 #if wxRICHTEXT_BUFFERED_PAINTING
 400         wxBufferedPaintDC dc(this, m_bufferBitmap);
 401 #else
 402         wxPaintDC dc(this);
 403 #endif
 404
 405         if (IsFrozen())
 406             return;
 407
 408         PrepareDC(dc);
 409
 410         dc.SetFont(GetFont());
 411
 412         // Paint the background
 413         PaintBackground(dc);
 414
 415         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 416
 417         wxRect drawingArea(GetUpdateRegion().GetBox());
 418         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 419
 420         wxRect availableSpace(GetClientSize());
 421         if (GetBuffer().IsDirty())
 422         {
 423             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 424             GetBuffer().Invalidate(wxRICHTEXT_NONE);
 425             SetupScrollbars();
 426         }
 427
 428         wxRect clipRect(availableSpace);
 429         clipRect.x += GetBuffer().GetLeftMargin();
 430         clipRect.y += GetBuffer().GetTopMargin();
 431         clipRect.width -= (GetBuffer().GetLeftMargin() + GetBuffer().GetRightMargin());
 432         clipRect.height -= (GetBuffer().GetTopMargin() + GetBuffer().GetBottomMargin());
 433         clipRect.SetPosition(GetLogicalPoint(clipRect.GetPosition()));
 434         dc.SetClippingRegion(clipRect);
 435
 436         int flags = 0;
 437         if ((GetExtraStyle() & wxRICHTEXT_EX_NO_GUIDELINES) == 0)
 438             flags |= wxRICHTEXT_DRAW_GUIDELINES;
 439
 440         GetBuffer().Draw(dc, GetBuffer().GetOwnRange(), GetSelection(), drawingArea, 0 /* descent */, flags);
 441
 442         dc.DestroyClippingRegion();
 443
 444         // Other user defined painting after everything else (i.e. all text) is painted
 445         PaintAboveContent(dc);
 446
 447 #if wxRICHTEXT_USE_OWN_CARET
 448         if (GetCaret()->IsVisible())
 449         {
 450             ((wxRichTextCaret*) GetCaret())->DoDraw(& dc);
 451         }
 452 #endif
 453     }
 454
 455 #if !wxRICHTEXT_USE_OWN_CARET
 456     if (GetCaret())
 457         GetCaret()->Show();
 458     PositionCaret();
 459 #endif
 460 }
 461
 462 // Empty implementation, to prevent flicker
 463 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 464 {
 465 }
 466
 467 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 468 {
 469     if (GetCaret())
 470     {
 471 #if !wxRICHTEXT_USE_OWN_CARET
 472         PositionCaret();
 473 #endif
 474         GetCaret()->Show();
 475     }
 476
 477 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 478     // Work around dropouts when control is focused
 479     if (!IsFrozen())
 480     {
 481         Refresh(false);
 482     }
 483 #endif
 484 }
 485
 486 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 487 {
 488     if (GetCaret())
 489         GetCaret()->Hide();
 490
 491 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 492     // Work around dropouts when control is focused
 493     if (!IsFrozen())
 494     {
 495         Refresh(false);
 496     }
 497 #endif
 498 }
 499
 500 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 501 {
 502     m_dragging = false;
 503 }
 504
 505 // Set up the caret for the given position and container, after a mouse click
 506 bool wxRichTextCtrl::SetCaretPositionAfterClick(wxRichTextParagraphLayoutBox* container, long position, int hitTestFlags, bool extendSelection)
 507 {
 508     bool caretAtLineStart = false;
 509
 510     if (hitTestFlags & wxRICHTEXT_HITTEST_BEFORE)
 511     {
 512         // If we're at the start of a line (but not first in para)
 513         // then we should keep the caret showing at the start of the line
 514         // by showing the m_caretAtLineStart flag.
 515         wxRichTextParagraph* para = container->GetParagraphAtPosition(position);
 516         wxRichTextLine* line = container->GetLineAtPosition(position);
 517
 518         if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 519             caretAtLineStart = true;
 520         position --;
 521     }
 522
 523     if (extendSelection && (m_caretPosition != position))
 524         ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 525
 526     MoveCaret(position, caretAtLineStart);
 527     SetDefaultStyleToCursorStyle();
 528
 529     return true;
 530 }
 531
 532 /// Left-click
 533 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 534 {
 535     SetFocus();
 536
 537     wxClientDC dc(this);
 538     PrepareDC(dc);
 539     dc.SetFont(GetFont());
 540
 541     // TODO: detect change of focus object
 542     long position = 0;
 543     wxRichTextObject* hitObj = NULL;
 544     wxRichTextObject* contextObj = NULL;
 545     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position, & hitObj, & contextObj);
 546
 547     if (hit != wxRICHTEXT_HITTEST_NONE && hitObj)
 548     {
 549         wxRichTextParagraphLayoutBox* oldFocusObject = GetFocusObject();
 550         wxRichTextParagraphLayoutBox* container = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
 551         if (container && container != GetFocusObject() && container->AcceptsFocus())
 552         {
 553             SetFocusObject(container, false /* don't set caret position yet */);
 554         }
 555
 556         m_dragStart = event.GetLogicalPosition(dc);
 557         m_dragging = true;
 558         CaptureMouse();
 559
 560         long oldCaretPos = m_caretPosition;
 561
 562         SetCaretPositionAfterClick(container, position, hit);
 563
 564         // For now, don't handle shift-click when we're selecting multiple objects.
 565         if (event.ShiftDown() && GetFocusObject() == oldFocusObject && m_selectionState == wxRichTextCtrlSelectionState_Normal)
 566         {
 567             if (!m_selection.IsValid())
 568                 ExtendSelection(oldCaretPos, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 569             else
 570                 ExtendSelection(m_caretPosition, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 571         }
 572         else
 573             SelectNone();
 574     }
 575
 576     event.Skip();
 577 }
 578
 579 /// Left-up
 580 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 581 {
 582     if (m_dragging)
 583     {
 584         m_dragging = false;
 585         if (GetCapture() == this)
 586             ReleaseMouse();
 587
 588         // See if we clicked on a URL
 589         wxClientDC dc(this);
 590         PrepareDC(dc);
 591         dc.SetFont(GetFont());
 592
 593         long position = 0;
 594         wxPoint logicalPt = event.GetLogicalPosition(dc);
 595         wxRichTextObject* hitObj = NULL;
 596         wxRichTextObject* contextObj = NULL;
 597         // Only get objects at this level, not nested, because otherwise we couldn't swipe text at a single level.
 598         int hit = GetFocusObject()->HitTest(dc, logicalPt, position, & hitObj, & contextObj, wxRICHTEXT_HITTEST_NO_NESTED_OBJECTS);
 599
 600         if ((hit != wxRICHTEXT_HITTEST_NONE) && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 601         {
 602             wxRichTextEvent cmdEvent(
 603                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 604                 GetId());
 605             cmdEvent.SetEventObject(this);
 606             cmdEvent.SetPosition(position);
 607             if (hitObj)
 608                 cmdEvent.SetContainer(hitObj->GetContainer());
 609
 610             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 611             {
 612                 wxRichTextAttr attr;
 613                 if (GetStyle(position, attr))
 614                 {
 615                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 616                     {
 617                         wxString urlTarget = attr.GetURL();
 618                         if (!urlTarget.IsEmpty())
 619                         {
 620                             wxMouseEvent mouseEvent(event);
 621
 622                             long startPos = 0, endPos = 0;
 623                             wxRichTextObject* obj = GetFocusObject()->GetLeafObjectAtPosition(position);
 624                             if (obj)
 625                             {
 626                                 startPos = obj->GetRange().GetStart();
 627                                 endPos = obj->GetRange().GetEnd();
 628                             }
 629
 630                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 631                             InitCommandEvent(urlEvent);
 632
 633                             urlEvent.SetString(urlTarget);
 634
 635                             GetEventHandler()->ProcessEvent(urlEvent);
 636                         }
 637                     }
 638                 }
 639             }
 640         }
 641     }
 642 }
 643
 644 /// Left-click
 645 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 646 {
 647     wxClientDC dc(this);
 648     PrepareDC(dc);
 649     dc.SetFont(GetFont());
 650
 651     long position = 0;
 652     wxPoint logicalPt = event.GetLogicalPosition(dc);
 653     wxRichTextObject* hitObj = NULL;
 654     wxRichTextObject* contextObj = NULL;
 655
 656     int flags = 0;
 657
 658     // If we're dragging, let's only consider positions at this level; otherwise
 659     // selecting a range is not going to work.
 660     wxRichTextParagraphLayoutBox* container = & GetBuffer();
 661     if (m_dragging)
 662     {
 663         flags = wxRICHTEXT_HITTEST_NO_NESTED_OBJECTS;
 664         container = GetFocusObject();
 665     }
 666     int hit = container->HitTest(dc, logicalPt, position, & hitObj, & contextObj, flags);
 667
 668     // See if we need to change the cursor
 669
 670     {
 671         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE) && hitObj)
 672         {
 673             wxRichTextParagraphLayoutBox* actualContainer = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
 674             wxRichTextAttr attr;
 675             if (actualContainer && GetStyle(position, attr, actualContainer))
 676             {
 677                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 678                 {
 679                     SetCursor(m_urlCursor);
 680                 }
 681                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 682                 {
 683                     SetCursor(m_textCursor);
 684                 }
 685             }
 686         }
 687         else
 688             SetCursor(m_textCursor);
 689     }
 690
 691     if (!event.Dragging())
 692     {
 693         event.Skip();
 694         return;
 695     }
 696
 697     if (m_dragging)
 698     {
 699         wxRichTextParagraphLayoutBox* commonAncestor = NULL;
 700         wxRichTextParagraphLayoutBox* otherContainer = NULL;
 701         wxRichTextParagraphLayoutBox* firstContainer = NULL;
 702
 703         // Check for dragging across multiple containers
 704         long position2 = 0;
 705         wxRichTextObject* hitObj2 = NULL, *contextObj2 = NULL;
 706         int hit2 = GetBuffer().HitTest(dc, logicalPt, position2, & hitObj2, & contextObj2, 0);
 707         if (hit2 != wxRICHTEXT_HITTEST_NONE && !(hit2 & wxRICHTEXT_HITTEST_OUTSIDE) && hitObj2 && hitObj != hitObj2)
 708         {
 709             // See if we can find a common ancestor
 710             if (m_selectionState == wxRichTextCtrlSelectionState_Normal)
 711             {
 712                 firstContainer = GetFocusObject();
 713                 commonAncestor = wxDynamicCast(firstContainer->GetParent(), wxRichTextParagraphLayoutBox);
 714             }
 715             else
 716             {
 717                 firstContainer = wxDynamicCast(m_selectionAnchorObject, wxRichTextParagraphLayoutBox);
 718                 //commonAncestor = GetFocusObject(); // when the selection state is not normal, the focus object (e.g. table)
 719                                                    // is the common ancestor.
 720                 commonAncestor = wxDynamicCast(firstContainer->GetParent(), wxRichTextParagraphLayoutBox);
 721             }
 722
 723             if (commonAncestor && commonAncestor->HandlesChildSelections())
 724             {
 725                 wxRichTextObject* p = hitObj2;
 726                 while (p)
 727                 {
 728                     if (p->GetParent() == commonAncestor)
 729                     {
 730                         otherContainer = wxDynamicCast(p, wxRichTextParagraphLayoutBox);
 731                         break;
 732                     }
 733                     p = p->GetParent();
 734                 }
 735             }
 736
 737             if (commonAncestor && firstContainer && otherContainer)
 738             {
 739                 // We have now got a second container that shares a parent with the current or anchor object.
 740                 if (m_selectionState == wxRichTextCtrlSelectionState_Normal)
 741                 {
 742                     // Don't go into common-ancestor selection mode if we still have the same
 743                     // container.
 744                     if (otherContainer != firstContainer)
 745                     {
 746                         m_selectionState = wxRichTextCtrlSelectionState_CommonAncestor;
 747                         m_selectionAnchorObject = firstContainer;
 748                         m_selectionAnchor = firstContainer->GetRange().GetStart();
 749
 750                         // The common ancestor, such as a table, returns the cell selection
 751                         // between the anchor and current position.
 752                         m_selection = commonAncestor->GetSelection(m_selectionAnchor, otherContainer->GetRange().GetStart());
 753                     }
 754                 }
 755                 else
 756                 {
 757                     m_selection = commonAncestor->GetSelection(m_selectionAnchor, otherContainer->GetRange().GetStart());
 758                 }
 759
 760                 Refresh();
 761
 762                 if (otherContainer->AcceptsFocus())
 763                     SetFocusObject(otherContainer, false /* don't set caret and clear selection */);
 764                 MoveCaret(-1, false);
 765                 SetDefaultStyleToCursorStyle();
 766             }
 767         }
 768     }
 769
 770     if (hitObj && m_dragging && hit != wxRICHTEXT_HITTEST_NONE && m_selectionState == wxRichTextCtrlSelectionState_Normal)
 771     {
 772         // TODO: test closeness
 773         SetCaretPositionAfterClick(container, position, hit, true /* extend selection */);
 774     }
 775 }
 776
 777 /// Right-click
 778 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 779 {
 780     SetFocus();
 781
 782     wxClientDC dc(this);
 783     PrepareDC(dc);
 784     dc.SetFont(GetFont());
 785
 786     long position = 0;
 787     wxPoint logicalPt = event.GetLogicalPosition(dc);
 788     wxRichTextObject* hitObj = NULL;
 789     wxRichTextObject* contextObj = NULL;
 790     int hit = GetFocusObject()->HitTest(dc, logicalPt, position, & hitObj, & contextObj);
 791
 792     if (hitObj && hitObj->GetContainer() != GetFocusObject())
 793     {
 794         wxRichTextParagraphLayoutBox* actualContainer = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
 795         if (actualContainer && actualContainer->AcceptsFocus())
 796         {
 797             SetFocusObject(actualContainer, false /* don't set caret position yet */);
 798             SetCaretPositionAfterClick(actualContainer, position, hit);
 799         }
 800     }
 801
 802     wxRichTextEvent cmdEvent(
 803         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 804         GetId());
 805     cmdEvent.SetEventObject(this);
 806     cmdEvent.SetPosition(position);
 807     if (hitObj)
 808         cmdEvent.SetContainer(hitObj->GetContainer());
 809
 810     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 811         event.Skip();
 812 }
 813
 814 /// Left-double-click
 815 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 816 {
 817     wxRichTextEvent cmdEvent(
 818         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
 819         GetId());
 820     cmdEvent.SetEventObject(this);
 821     cmdEvent.SetPosition(m_caretPosition+1);
 822     cmdEvent.SetContainer(GetFocusObject());
 823
 824     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 825     {
 826         SelectWord(GetCaretPosition()+1);
 827     }
 828 }
 829
 830 /// Middle-click
 831 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 832 {
 833     wxRichTextEvent cmdEvent(
 834         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
 835         GetId());
 836     cmdEvent.SetEventObject(this);
 837     cmdEvent.SetPosition(m_caretPosition+1);
 838     cmdEvent.SetContainer(GetFocusObject());
 839
 840     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 841         event.Skip();
 842 }
 843
 844 /// Key press
 845 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 846 {
 847     int flags = 0;
 848     if (event.CmdDown())
 849         flags |= wxRICHTEXT_CTRL_DOWN;
 850     if (event.ShiftDown())
 851         flags |= wxRICHTEXT_SHIFT_DOWN;
 852     if (event.AltDown())
 853         flags |= wxRICHTEXT_ALT_DOWN;
 854
 855     if (event.GetEventType() == wxEVT_KEY_DOWN)
 856     {
 857         if (event.IsKeyInCategory(WXK_CATEGORY_NAVIGATION))
 858         {
 859             KeyboardNavigate(event.GetKeyCode(), flags);
 860             return;
 861         }
 862
 863         long keycode = event.GetKeyCode();
 864         switch ( keycode )
 865         {
 866             case WXK_ESCAPE:
 867             case WXK_START:
 868             case WXK_LBUTTON:
 869             case WXK_RBUTTON:
 870             case WXK_CANCEL:
 871             case WXK_MBUTTON:
 872             case WXK_CLEAR:
 873             case WXK_SHIFT:
 874             case WXK_ALT:
 875             case WXK_CONTROL:
 876             case WXK_MENU:
 877             case WXK_PAUSE:
 878             case WXK_CAPITAL:
 879             case WXK_END:
 880             case WXK_HOME:
 881             case WXK_LEFT:
 882             case WXK_UP:
 883             case WXK_RIGHT:
 884             case WXK_DOWN:
 885             case WXK_SELECT:
 886             case WXK_PRINT:
 887             case WXK_EXECUTE:
 888             case WXK_SNAPSHOT:
 889             case WXK_INSERT:
 890             case WXK_HELP:
 891             case WXK_F1:
 892             case WXK_F2:
 893             case WXK_F3:
 894             case WXK_F4:
 895             case WXK_F5:
 896             case WXK_F6:
 897             case WXK_F7:
 898             case WXK_F8:
 899             case WXK_F9:
 900             case WXK_F10:
 901             case WXK_F11:
 902             case WXK_F12:
 903             case WXK_F13:
 904             case WXK_F14:
 905             case WXK_F15:
 906             case WXK_F16:
 907             case WXK_F17:
 908             case WXK_F18:
 909             case WXK_F19:
 910             case WXK_F20:
 911             case WXK_F21:
 912             case WXK_F22:
 913             case WXK_F23:
 914             case WXK_F24:
 915             case WXK_NUMLOCK:
 916             case WXK_SCROLL:
 917             case WXK_PAGEUP:
 918             case WXK_PAGEDOWN:
 919             case WXK_NUMPAD_F1:
 920             case WXK_NUMPAD_F2:
 921             case WXK_NUMPAD_F3:
 922             case WXK_NUMPAD_F4:
 923             case WXK_NUMPAD_HOME:
 924             case WXK_NUMPAD_LEFT:
 925             case WXK_NUMPAD_UP:
 926             case WXK_NUMPAD_RIGHT:
 927             case WXK_NUMPAD_DOWN:
 928             case WXK_NUMPAD_PAGEUP:
 929             case WXK_NUMPAD_PAGEDOWN:
 930             case WXK_NUMPAD_END:
 931             case WXK_NUMPAD_BEGIN:
 932             case WXK_NUMPAD_INSERT:
 933             case WXK_WINDOWS_LEFT:
 934             {
 935                 return;
 936             }
 937             default:
 938             {
 939             }
 940         }
 941
 942         // Must process this before translation, otherwise it's translated into a WXK_DELETE event.
 943         if (event.CmdDown() && event.GetKeyCode() == WXK_BACK)
 944         {
 945             BeginBatchUndo(_("Delete Text"));
 946
 947             long newPos = m_caretPosition;
 948
 949             bool processed = DeleteSelectedContent(& newPos);
 950
 951             // Submit range in character positions, which are greater than caret positions,
 952             // so subtract 1 for deleted character and add 1 for conversion to character position.
 953             if (newPos > -1)
 954             {
 955                 if (event.CmdDown())
 956                 {
 957                     long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 958                     if (pos < newPos)
 959                     {
 960                         GetFocusObject()->DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this, & GetBuffer());
 961                         processed = true;
 962                     }
 963                 }
 964
 965                 if (!processed)
 966                     GetFocusObject()->DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this, & GetBuffer());
 967             }
 968
 969             EndBatchUndo();
 970
 971             if (GetLastPosition() == -1)
 972             {
 973                 GetFocusObject()->Reset();
 974
 975                 m_caretPosition = -1;
 976                 PositionCaret();
 977                 SetDefaultStyleToCursorStyle();
 978             }
 979
 980             ScrollIntoView(m_caretPosition, WXK_LEFT);
 981
 982             wxRichTextEvent cmdEvent(
 983                 wxEVT_COMMAND_RICHTEXT_DELETE,
 984                 GetId());
 985             cmdEvent.SetEventObject(this);
 986             cmdEvent.SetFlags(flags);
 987             cmdEvent.SetPosition(m_caretPosition+1);
 988             cmdEvent.SetContainer(GetFocusObject());
 989             GetEventHandler()->ProcessEvent(cmdEvent);
 990
 991             Update();
 992         }
 993         else
 994             event.Skip();
 995
 996         return;
 997     }
 998
 999     // all the other keys modify the controls contents which shouldn't be
1000     // possible if we're read-only
1001     if ( !IsEditable() )
1002     {
1003         event.Skip();
1004         return;
1005     }
1006
1007     if (event.GetKeyCode() == WXK_RETURN)
1008     {
1009         BeginBatchUndo(_("Insert Text"));
1010
1011         long newPos = m_caretPosition;
1012
1013         DeleteSelectedContent(& newPos);
1014
1015         if (event.ShiftDown())
1016         {
1017             wxString text;
1018             text = wxRichTextLineBreakChar;
1019             GetFocusObject()->InsertTextWithUndo(newPos+1, text, this, & GetBuffer());
1020             m_caretAtLineStart = true;
1021             PositionCaret();
1022         }
1023         else
1024             GetFocusObject()->InsertNewlineWithUndo(newPos+1, this, & GetBuffer(), wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE|wxRICHTEXT_INSERT_INTERACTIVE);
1025
1026         EndBatchUndo();
1027         SetDefaultStyleToCursorStyle();
1028
1029         ScrollIntoView(m_caretPosition, WXK_RIGHT);
1030
1031         wxRichTextEvent cmdEvent(
1032             wxEVT_COMMAND_RICHTEXT_RETURN,
1033             GetId());
1034         cmdEvent.SetEventObject(this);
1035         cmdEvent.SetFlags(flags);
1036         cmdEvent.SetPosition(newPos+1);
1037         cmdEvent.SetContainer(GetFocusObject());
1038
1039         if (!GetEventHandler()->ProcessEvent(cmdEvent))
1040         {
1041             // Generate conventional event
1042             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
1043             InitCommandEvent(textEvent);
1044
1045             GetEventHandler()->ProcessEvent(textEvent);
1046         }
1047         Update();
1048     }
1049     else if (event.GetKeyCode() == WXK_BACK)
1050     {
1051         BeginBatchUndo(_("Delete Text"));
1052
1053         long newPos = m_caretPosition;
1054
1055         bool processed = DeleteSelectedContent(& newPos);
1056
1057         // Submit range in character positions, which are greater than caret positions,
1058         // so subtract 1 for deleted character and add 1 for conversion to character position.
1059         if (newPos > -1)
1060         {
1061             if (event.CmdDown())
1062             {
1063                 long pos = wxRichTextCtrl::FindNextWordPosition(-1);
1064                 if (pos < newPos)
1065                 {
1066                     GetFocusObject()->DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this, & GetBuffer());
1067                     processed = true;
1068                 }
1069             }
1070
1071             if (!processed)
1072                 GetFocusObject()->DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this, & GetBuffer());
1073         }
1074
1075         EndBatchUndo();
1076
1077         if (GetLastPosition() == -1)
1078         {
1079             GetFocusObject()->Reset();
1080
1081             m_caretPosition = -1;
1082             PositionCaret();
1083             SetDefaultStyleToCursorStyle();
1084         }
1085
1086         ScrollIntoView(m_caretPosition, WXK_LEFT);
1087
1088         wxRichTextEvent cmdEvent(
1089             wxEVT_COMMAND_RICHTEXT_DELETE,
1090             GetId());
1091         cmdEvent.SetEventObject(this);
1092         cmdEvent.SetFlags(flags);
1093         cmdEvent.SetPosition(m_caretPosition+1);
1094         cmdEvent.SetContainer(GetFocusObject());
1095         GetEventHandler()->ProcessEvent(cmdEvent);
1096
1097         Update();
1098     }
1099     else if (event.GetKeyCode() == WXK_DELETE)
1100     {
1101         BeginBatchUndo(_("Delete Text"));
1102
1103         long newPos = m_caretPosition;
1104
1105         bool processed = DeleteSelectedContent(& newPos);
1106
1107         // Submit range in character positions, which are greater than caret positions,
1108         if (newPos < GetFocusObject()->GetOwnRange().GetEnd()+1)
1109         {
1110             if (event.CmdDown())
1111             {
1112                 long pos = wxRichTextCtrl::FindNextWordPosition(1);
1113                 if (pos != -1 && (pos > newPos))
1114                 {
1115                     GetFocusObject()->DeleteRangeWithUndo(wxRichTextRange(newPos+1, pos), this, & GetBuffer());
1116                     processed = true;
1117                 }
1118             }
1119
1120             if (!processed && newPos < (GetLastPosition()-1))
1121                 GetFocusObject()->DeleteRangeWithUndo(wxRichTextRange(newPos+1, newPos+1), this, & GetBuffer());
1122         }
1123
1124         EndBatchUndo();
1125
1126         if (GetLastPosition() == -1)
1127         {
1128             GetFocusObject()->Reset();
1129
1130             m_caretPosition = -1;
1131             PositionCaret();
1132             SetDefaultStyleToCursorStyle();
1133         }
1134
1135         wxRichTextEvent cmdEvent(
1136             wxEVT_COMMAND_RICHTEXT_DELETE,
1137             GetId());
1138         cmdEvent.SetEventObject(this);
1139         cmdEvent.SetFlags(flags);
1140         cmdEvent.SetPosition(m_caretPosition+1);
1141         cmdEvent.SetContainer(GetFocusObject());
1142         GetEventHandler()->ProcessEvent(cmdEvent);
1143
1144         Update();
1145     }
1146     else
1147     {
1148         long keycode = event.GetKeyCode();
1149         switch ( keycode )
1150         {
1151             case WXK_ESCAPE:
1152             {
1153                 event.Skip();
1154                 return;
1155             }
1156
1157             default:
1158             {
1159 #ifdef __WXMAC__
1160                 if (event.CmdDown())
1161 #else
1162                 // Fixes AltGr+key with European input languages on Windows
1163                 if ((event.CmdDown() && !event.AltDown()) || (event.AltDown() && !event.CmdDown()))
1164 #endif
1165                 {
1166                     event.Skip();
1167                     return;
1168                 }
1169
1170                 wxRichTextEvent cmdEvent(
1171                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
1172                     GetId());
1173                 cmdEvent.SetEventObject(this);
1174                 cmdEvent.SetFlags(flags);
1175 #if wxUSE_UNICODE
1176                 cmdEvent.SetCharacter(event.GetUnicodeKey());
1177 #else
1178                 cmdEvent.SetCharacter((wxChar) keycode);
1179 #endif
1180                 cmdEvent.SetPosition(m_caretPosition+1);
1181                 cmdEvent.SetContainer(GetFocusObject());
1182
1183                 if (keycode == wxT('\t'))
1184                 {
1185                     // See if we need to promote or demote the selection or paragraph at the cursor
1186                     // position, instead of inserting a tab.
1187                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
1188                     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(pos);
1189                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
1190                     {
1191                         wxRichTextRange range;
1192                         if (HasSelection())
1193                             range = GetSelectionRange();
1194                         else
1195                             range = para->GetRange().FromInternal();
1196
1197                         int promoteBy = event.ShiftDown() ? 1 : -1;
1198
1199                         PromoteList(promoteBy, range, NULL);
1200
1201                         GetEventHandler()->ProcessEvent(cmdEvent);
1202
1203                         return;
1204                     }
1205                 }
1206
1207                 BeginBatchUndo(_("Insert Text"));
1208
1209                 long newPos = m_caretPosition;
1210                 DeleteSelectedContent(& newPos);
1211
1212 #if wxUSE_UNICODE
1213                 wxString str = event.GetUnicodeKey();
1214 #else
1215                 wxString str = (wxChar) event.GetKeyCode();
1216 #endif
1217                 GetFocusObject()->InsertTextWithUndo(newPos+1, str, this, & GetBuffer(), 0);
1218
1219                 EndBatchUndo();
1220
1221                 SetDefaultStyleToCursorStyle();
1222                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
1223
1224                 cmdEvent.SetPosition(m_caretPosition);
1225                 GetEventHandler()->ProcessEvent(cmdEvent);
1226
1227                 Update();
1228             }
1229         }
1230     }
1231 }
1232
1233 /// Delete content if there is a selection, e.g. when pressing a key.
1234 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
1235 {
1236     if (HasSelection())
1237     {
1238         long pos = m_selection.GetRange().GetStart();
1239         wxRichTextRange range = m_selection.GetRange();
1240
1241         // SelectAll causes more to be selected than doing it interactively,
1242         // and causes a new paragraph to be inserted. So for multiline buffers,
1243         // don't delete the final position.
1244         if (range.GetEnd() == GetLastPosition() && GetNumberOfLines() > 0)
1245             range.SetEnd(range.GetEnd()-1);
1246
1247         GetFocusObject()->DeleteRangeWithUndo(range, this, & GetBuffer());
1248         m_selection.Reset();
1249         m_selectionState = wxRichTextCtrlSelectionState_Normal;
1250
1251         if (newPos)
1252             *newPos = pos-1;
1253         return true;
1254     }
1255     else
1256         return false;
1257 }
1258
1259 /// Keyboard navigation
1260
1261 /*
1262
1263 Left:       left one character
1264 Right:      right one character
1265 Up:         up one line
1266 Down:       down one line
1267 Ctrl-Left:  left one word
1268 Ctrl-Right: right one word
1269 Ctrl-Up:    previous paragraph start
1270 Ctrl-Down:  next start of paragraph
1271 Home:       start of line
1272 End:        end of line
1273 Ctrl-Home:  start of document
1274 Ctrl-End:   end of document
1275 Page-Up:    Up a screen
1276 Page-Down:  Down a screen
1277
1278 Maybe:
1279
1280 Ctrl-Alt-PgUp: Start of window
1281 Ctrl-Alt-PgDn: End of window
1282 F8:         Start selection mode
1283 Esc:        End selection mode
1284
1285 Adding Shift does the above but starts/extends selection.
1286
1287
1288  */
1289
1290 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
1291 {
1292     bool success = false;
1293
1294     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
1295     {
1296         if (flags & wxRICHTEXT_CTRL_DOWN)
1297             success = WordRight(1, flags);
1298         else
1299             success = MoveRight(1, flags);
1300     }
1301     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
1302     {
1303         if (flags & wxRICHTEXT_CTRL_DOWN)
1304             success = WordLeft(1, flags);
1305         else
1306             success = MoveLeft(1, flags);
1307     }
1308     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
1309     {
1310         if (flags & wxRICHTEXT_CTRL_DOWN)
1311             success = MoveToParagraphStart(flags);
1312         else
1313             success = MoveUp(1, flags);
1314     }
1315     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
1316     {
1317         if (flags & wxRICHTEXT_CTRL_DOWN)
1318             success = MoveToParagraphEnd(flags);
1319         else
1320             success = MoveDown(1, flags);
1321     }
1322     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
1323     {
1324         success = PageUp(1, flags);
1325     }
1326     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1327     {
1328         success = PageDown(1, flags);
1329     }
1330     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
1331     {
1332         if (flags & wxRICHTEXT_CTRL_DOWN)
1333             success = MoveHome(flags);
1334         else
1335             success = MoveToLineStart(flags);
1336     }
1337     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
1338     {
1339         if (flags & wxRICHTEXT_CTRL_DOWN)
1340             success = MoveEnd(flags);
1341         else
1342             success = MoveToLineEnd(flags);
1343     }
1344
1345     if (success)
1346     {
1347         ScrollIntoView(m_caretPosition, keyCode);
1348         SetDefaultStyleToCursorStyle();
1349     }
1350
1351     return success;
1352 }
1353
1354 /// Extend the selection. Selections are in caret positions.
1355 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
1356 {
1357     if (flags & wxRICHTEXT_SHIFT_DOWN)
1358     {
1359         if (oldPos == newPos)
1360             return false;
1361
1362         wxRichTextSelection oldSelection = m_selection;
1363
1364         m_selection.SetContainer(GetFocusObject());
1365
1366         wxRichTextRange oldRange;
1367         if (m_selection.IsValid())
1368             oldRange = m_selection.GetRange();
1369         else
1370             oldRange = wxRICHTEXT_NO_SELECTION;
1371         wxRichTextRange newRange;
1372
1373         // If not currently selecting, start selecting
1374         if (oldRange.GetStart() == -2)
1375         {
1376             m_selectionAnchor = oldPos;
1377
1378             if (oldPos > newPos)
1379                 newRange.SetRange(newPos+1, oldPos);
1380             else
1381                 newRange.SetRange(oldPos+1, newPos);
1382         }
1383         else
1384         {
1385             // Always ensure that the selection range start is greater than
1386             // the end.
1387             if (newPos > m_selectionAnchor)
1388                 newRange.SetRange(m_selectionAnchor+1, newPos);
1389             else if (newPos == m_selectionAnchor)
1390                 newRange = wxRichTextRange(-2, -2);
1391             else
1392                 newRange.SetRange(newPos+1, m_selectionAnchor);
1393         }
1394
1395         m_selection.SetRange(newRange);
1396
1397         RefreshForSelectionChange(oldSelection, m_selection);
1398
1399         if (newRange.GetStart() > newRange.GetEnd())
1400         {
1401             wxLogDebug(wxT("Strange selection range"));
1402         }
1403
1404         return true;
1405     }
1406     else
1407         return false;
1408 }
1409
1410 /// Scroll into view, returning true if we scrolled.
1411 /// This takes a _caret_ position.
1412 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1413 {
1414     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1415
1416     if (!line)
1417         return false;
1418
1419     int ppuX, ppuY;
1420     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1421
1422     int startXUnits, startYUnits;
1423     GetViewStart(& startXUnits, & startYUnits);
1424     int startY = startYUnits * ppuY;
1425
1426     int sx = 0, sy = 0;
1427     GetVirtualSize(& sx, & sy);
1428     int sxUnits = 0;
1429     int syUnits = 0;
1430     if (ppuY != 0)
1431         syUnits = sy/ppuY;
1432
1433     wxRect rect = line->GetRect();
1434
1435     bool scrolled = false;
1436
1437     wxSize clientSize = GetClientSize();
1438
1439     int leftMargin, rightMargin, topMargin, bottomMargin;
1440
1441     {
1442         wxClientDC dc(this);
1443         wxRichTextObject::GetTotalMargin(dc, & GetBuffer(), GetBuffer().GetAttributes(), leftMargin, rightMargin,
1444             topMargin, bottomMargin);
1445     }
1446 //    clientSize.y -= GetBuffer().GetBottomMargin();
1447     clientSize.y -= bottomMargin;
1448
1449     if (GetWindowStyle() & wxRE_CENTRE_CARET)
1450     {
1451         int y = rect.y - GetClientSize().y/2;
1452         int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1453         if (y >= 0 && (y + clientSize.y) < GetBuffer().GetCachedSize().y)
1454         {
1455             if (startYUnits != yUnits)
1456             {
1457                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1458                 scrolled = true;
1459             }
1460 #if !wxRICHTEXT_USE_OWN_CARET
1461             if (scrolled)
1462 #endif
1463                 PositionCaret();
1464
1465             return scrolled;
1466         }
1467     }
1468
1469     // Going down
1470     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1471         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1472         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1473         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1474     {
1475         if ((rect.y + rect.height) > (clientSize.y + startY))
1476         {
1477             // Make it scroll so this item is at the bottom
1478             // of the window
1479             int y = rect.y - (clientSize.y - rect.height);
1480             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1481
1482             // If we're still off the screen, scroll another line down
1483             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1484                 yUnits ++;
1485
1486             if (startYUnits != yUnits)
1487             {
1488                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1489                 scrolled = true;
1490             }
1491         }
1492         else if (rect.y < (startY + GetBuffer().GetTopMargin()))
1493         {
1494             // Make it scroll so this item is at the top
1495             // of the window
1496             int y = rect.y - GetBuffer().GetTopMargin();
1497             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1498
1499             if (startYUnits != yUnits)
1500             {
1501                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1502                 scrolled = true;
1503             }
1504         }
1505     }
1506     // Going up
1507     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1508              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1509              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1510              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1511     {
1512         if (rect.y < (startY + GetBuffer().GetBottomMargin()))
1513         {
1514             // Make it scroll so this item is at the top
1515             // of the window
1516             int y = rect.y - GetBuffer().GetTopMargin();
1517             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1518
1519             if (startYUnits != yUnits)
1520             {
1521                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1522                 scrolled = true;
1523             }
1524         }
1525         else if ((rect.y + rect.height) > (clientSize.y + startY))
1526         {
1527             // Make it scroll so this item is at the bottom
1528             // of the window
1529             int y = rect.y - (clientSize.y - rect.height);
1530             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1531
1532             // If we're still off the screen, scroll another line down
1533             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1534                 yUnits ++;
1535
1536             if (startYUnits != yUnits)
1537             {
1538                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1539                 scrolled = true;
1540             }
1541         }
1542     }
1543
1544 #if !wxRICHTEXT_USE_OWN_CARET
1545     if (scrolled)
1546 #endif
1547         PositionCaret();
1548
1549     return scrolled;
1550 }
1551
1552 /// Is the given position visible on the screen?
1553 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1554 {
1555     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1556
1557     if (!line)
1558         return false;
1559
1560     int ppuX, ppuY;
1561     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1562
1563     int startX, startY;
1564     GetViewStart(& startX, & startY);
1565     startX = 0;
1566     startY = startY * ppuY;
1567
1568     wxRect rect = line->GetRect();
1569     wxSize clientSize = GetClientSize();
1570     clientSize.y -= GetBuffer().GetBottomMargin();
1571
1572     return (rect.GetTop() >= (startY + GetBuffer().GetTopMargin())) && (rect.GetBottom() <= (startY + clientSize.y));
1573 }
1574
1575 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1576 {
1577     m_caretPosition = position;
1578     m_caretAtLineStart = showAtLineStart;
1579 }
1580
1581 /// Move caret one visual step forward: this may mean setting a flag
1582 /// and keeping the same position if we're going from the end of one line
1583 /// to the start of the next, which may be the exact same caret position.
1584 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1585 {
1586     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(oldPosition);
1587
1588     // Only do the check if we're not at the end of the paragraph (where things work OK
1589     // anyway)
1590     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1591     {
1592         wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(oldPosition);
1593
1594         if (line)
1595         {
1596             wxRichTextRange lineRange = line->GetAbsoluteRange();
1597
1598             // We're at the end of a line. See whether we need to
1599             // stay at the same actual caret position but change visual
1600             // position, or not.
1601             if (oldPosition == lineRange.GetEnd())
1602             {
1603                 if (m_caretAtLineStart)
1604                 {
1605                     // We're already at the start of the line, so actually move on now.
1606                     m_caretPosition = oldPosition + 1;
1607                     m_caretAtLineStart = false;
1608                 }
1609                 else
1610                 {
1611                     // We're showing at the end of the line, so keep to
1612                     // the same position but indicate that we're to show
1613                     // at the start of the next line.
1614                     m_caretPosition = oldPosition;
1615                     m_caretAtLineStart = true;
1616                 }
1617                 SetDefaultStyleToCursorStyle();
1618                 return;
1619             }
1620         }
1621     }
1622     m_caretPosition ++;
1623     SetDefaultStyleToCursorStyle();
1624 }
1625
1626 /// Move caret one visual step backward: this may mean setting a flag
1627 /// and keeping the same position if we're going from the end of one line
1628 /// to the start of the next, which may be the exact same caret position.
1629 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1630 {
1631     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(oldPosition);
1632
1633     // Only do the check if we're not at the start of the paragraph (where things work OK
1634     // anyway)
1635     if (para && (oldPosition != para->GetRange().GetStart()))
1636     {
1637         wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(oldPosition);
1638
1639         if (line)
1640         {
1641             wxRichTextRange lineRange = line->GetAbsoluteRange();
1642
1643             // We're at the start of a line. See whether we need to
1644             // stay at the same actual caret position but change visual
1645             // position, or not.
1646             if (oldPosition == lineRange.GetStart())
1647             {
1648                 m_caretPosition = oldPosition-1;
1649                 m_caretAtLineStart = true;
1650                 return;
1651             }
1652             else if (oldPosition == lineRange.GetEnd())
1653             {
1654                 if (m_caretAtLineStart)
1655                 {
1656                     // We're at the start of the line, so keep the same caret position
1657                     // but clear the start-of-line flag.
1658                     m_caretPosition = oldPosition;
1659                     m_caretAtLineStart = false;
1660                 }
1661                 else
1662                 {
1663                     // We're showing at the end of the line, so go back
1664                     // to the previous character position.
1665                     m_caretPosition = oldPosition - 1;
1666                 }
1667                 SetDefaultStyleToCursorStyle();
1668                 return;
1669             }
1670         }
1671     }
1672     m_caretPosition --;
1673     SetDefaultStyleToCursorStyle();
1674 }
1675
1676 /// Move right
1677 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1678 {
1679     long endPos = GetFocusObject()->GetOwnRange().GetEnd();
1680
1681     if (m_caretPosition + noPositions < endPos)
1682     {
1683         long oldPos = m_caretPosition;
1684         long newPos = m_caretPosition + noPositions;
1685
1686         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1687         if (!extendSel)
1688             SelectNone();
1689
1690         // Determine by looking at oldPos and m_caretPosition whether
1691         // we moved from the end of a line to the start of the next line, in which case
1692         // we want to adjust the caret position such that it is positioned at the
1693         // start of the next line, rather than jumping past the first character of the
1694         // line.
1695         if (noPositions == 1 && !extendSel)
1696             MoveCaretForward(oldPos);
1697         else
1698             SetCaretPosition(newPos);
1699
1700         PositionCaret();
1701         SetDefaultStyleToCursorStyle();
1702
1703         return true;
1704     }
1705     else
1706         return false;
1707 }
1708
1709 /// Move left
1710 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1711 {
1712     long startPos = -1;
1713
1714     if (m_caretPosition > startPos - noPositions + 1)
1715     {
1716         long oldPos = m_caretPosition;
1717         long newPos = m_caretPosition - noPositions;
1718         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1719         if (!extendSel)
1720             SelectNone();
1721
1722         if (noPositions == 1 && !extendSel)
1723             MoveCaretBack(oldPos);
1724         else
1725             SetCaretPosition(newPos);
1726
1727         PositionCaret();
1728         SetDefaultStyleToCursorStyle();
1729
1730         return true;
1731     }
1732     else
1733         return false;
1734 }
1735
1736 // Find the caret position for the combination of hit-test flags and character position.
1737 // Returns the caret position and also an indication of where to place the caret (caretLineStart)
1738 // since this is ambiguous (same position used for end of line and start of next).
1739 long wxRichTextCtrl::FindCaretPositionForCharacterPosition(long position, int hitTestFlags, wxRichTextParagraphLayoutBox* container,
1740                                                    bool& caretLineStart)
1741 {
1742     // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1743     // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1744     // so we view the caret at the start of the line.
1745     caretLineStart = false;
1746     long caretPosition = position;
1747
1748     if (hitTestFlags & wxRICHTEXT_HITTEST_BEFORE)
1749     {
1750         wxRichTextLine* thisLine = container->GetLineAtPosition(position-1);
1751         wxRichTextRange lineRange;
1752         if (thisLine)
1753             lineRange = thisLine->GetAbsoluteRange();
1754
1755         if (thisLine && (position-1) == lineRange.GetEnd())
1756         {
1757             caretPosition --;
1758             caretLineStart = true;
1759         }
1760         else
1761         {
1762             wxRichTextParagraph* para = container->GetParagraphAtPosition(position);
1763             if (para && para->GetRange().GetStart() == position)
1764                 caretPosition --;
1765         }
1766     }
1767     return caretPosition;
1768 }
1769
1770 /// Move up
1771 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1772 {
1773     return MoveDown(- noLines, flags);
1774 }
1775
1776 /// Move up
1777 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1778 {
1779     if (!GetCaret())
1780         return false;
1781
1782     long lineNumber = GetFocusObject()->GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1783     wxPoint pt = GetCaret()->GetPosition();
1784     long newLine = lineNumber + noLines;
1785     bool notInThisObject = false;
1786
1787     if (lineNumber != -1)
1788     {
1789         if (noLines > 0)
1790         {
1791             long lastLine = GetFocusObject()->GetVisibleLineNumber(GetFocusObject()->GetOwnRange().GetEnd());
1792             if (newLine > lastLine)
1793                 notInThisObject = true;
1794         }
1795         else
1796         {
1797             if (newLine < 0)
1798                 notInThisObject = true;
1799         }
1800     }
1801
1802     wxRichTextParagraphLayoutBox* container = GetFocusObject();
1803     int hitTestFlags = wxRICHTEXT_HITTEST_NO_NESTED_OBJECTS|wxRICHTEXT_HITTEST_NO_FLOATING_OBJECTS;
1804
1805     if (notInThisObject)
1806     {
1807         // If we know we're navigating out of the current object,
1808         // try to find an object anywhere in the buffer at the new position (up or down a bit)
1809         container = & GetBuffer();
1810         hitTestFlags &= ~wxRICHTEXT_HITTEST_NO_NESTED_OBJECTS;
1811
1812         if (noLines > 0) // going down
1813         {
1814             pt.y = GetFocusObject()->GetPosition().y + GetFocusObject()->GetCachedSize().y + 2;
1815         }
1816         else // going up
1817         {
1818             pt.y = GetFocusObject()->GetPosition().y - 2;
1819         }
1820     }
1821     else
1822     {
1823         wxRichTextLine* lineObj = GetFocusObject()->GetLineForVisibleLineNumber(newLine);
1824         if (lineObj)
1825             pt.y = lineObj->GetAbsolutePosition().y + 2;
1826         else
1827             return false;
1828     }
1829
1830     long newPos = 0;
1831     wxClientDC dc(this);
1832     PrepareDC(dc);
1833     dc.SetFont(GetFont());
1834
1835     wxRichTextObject* hitObj = NULL;
1836     wxRichTextObject* contextObj = NULL;
1837     int hitTest = container->HitTest(dc, pt, newPos, & hitObj, & contextObj, hitTestFlags);
1838
1839     if (hitObj &&
1840         ((hitTest & wxRICHTEXT_HITTEST_NONE) == 0) &&
1841         (! (hitObj == (& m_buffer) && ((hitTest & wxRICHTEXT_HITTEST_OUTSIDE) != 0))) // outside the buffer counts as 'do nothing'
1842         )
1843     {
1844         if (notInThisObject)
1845         {
1846             wxRichTextParagraphLayoutBox* actualContainer = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
1847             if (actualContainer && actualContainer != GetFocusObject() && actualContainer->AcceptsFocus())
1848             {
1849                 SetFocusObject(actualContainer, false /* don't set caret position yet */);
1850
1851                 container = actualContainer;
1852             }
1853         }
1854
1855         bool caretLineStart = true;
1856         long caretPosition = FindCaretPositionForCharacterPosition(newPos, hitTest, container, caretLineStart);
1857         long newSelEnd = caretPosition;
1858         bool extendSel;
1859
1860         if (notInThisObject)
1861             extendSel = false;
1862         else
1863             extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1864
1865         if (!extendSel)
1866             SelectNone();
1867
1868         SetCaretPosition(caretPosition, caretLineStart);
1869         PositionCaret();
1870         SetDefaultStyleToCursorStyle();
1871
1872         return true;
1873     }
1874
1875     return false;
1876 }
1877
1878 /// Move to the end of the paragraph
1879 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1880 {
1881     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(m_caretPosition, true);
1882     if (para)
1883     {
1884         long newPos = para->GetRange().GetEnd() - 1;
1885         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1886         if (!extendSel)
1887             SelectNone();
1888
1889         SetCaretPosition(newPos);
1890         PositionCaret();
1891         SetDefaultStyleToCursorStyle();
1892
1893         return true;
1894     }
1895
1896     return false;
1897 }
1898
1899 /// Move to the start of the paragraph
1900 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1901 {
1902     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(m_caretPosition, true);
1903     if (para)
1904     {
1905         long newPos = para->GetRange().GetStart() - 1;
1906         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1907         if (!extendSel)
1908             SelectNone();
1909
1910         SetCaretPosition(newPos);
1911         PositionCaret();
1912         SetDefaultStyleToCursorStyle();
1913
1914         return true;
1915     }
1916
1917     return false;
1918 }
1919
1920 /// Move to the end of the line
1921 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1922 {
1923     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1924
1925     if (line)
1926     {
1927         wxRichTextRange lineRange = line->GetAbsoluteRange();
1928         long newPos = lineRange.GetEnd();
1929         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1930         if (!extendSel)
1931             SelectNone();
1932
1933         SetCaretPosition(newPos);
1934         PositionCaret();
1935         SetDefaultStyleToCursorStyle();
1936
1937         return true;
1938     }
1939
1940     return false;
1941 }
1942
1943 /// Move to the start of the line
1944 bool wxRichTextCtrl::MoveToLineStart(int flags)
1945 {
1946     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1947     if (line)
1948     {
1949         wxRichTextRange lineRange = line->GetAbsoluteRange();
1950         long newPos = lineRange.GetStart()-1;
1951
1952         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1953         if (!extendSel)
1954             SelectNone();
1955
1956         wxRichTextParagraph* para = GetFocusObject()->GetParagraphForLine(line);
1957
1958         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1959         PositionCaret();
1960         SetDefaultStyleToCursorStyle();
1961
1962         return true;
1963     }
1964
1965     return false;
1966 }
1967
1968 /// Move to the start of the buffer
1969 bool wxRichTextCtrl::MoveHome(int flags)
1970 {
1971     if (m_caretPosition != -1)
1972     {
1973         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1974         if (!extendSel)
1975             SelectNone();
1976
1977         SetCaretPosition(-1);
1978         PositionCaret();
1979         SetDefaultStyleToCursorStyle();
1980
1981         return true;
1982     }
1983     else
1984         return false;
1985 }
1986
1987 /// Move to the end of the buffer
1988 bool wxRichTextCtrl::MoveEnd(int flags)
1989 {
1990     long endPos = GetFocusObject()->GetOwnRange().GetEnd()-1;
1991
1992     if (m_caretPosition != endPos)
1993     {
1994         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1995         if (!extendSel)
1996             SelectNone();
1997
1998         SetCaretPosition(endPos);
1999         PositionCaret();
2000         SetDefaultStyleToCursorStyle();
2001
2002         return true;
2003     }
2004     else
2005         return false;
2006 }
2007
2008 /// Move noPages pages up
2009 bool wxRichTextCtrl::PageUp(int noPages, int flags)
2010 {
2011     return PageDown(- noPages, flags);
2012 }
2013
2014 /// Move noPages pages down
2015 bool wxRichTextCtrl::PageDown(int noPages, int flags)
2016 {
2017     // Calculate which line occurs noPages * screen height further down.
2018     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
2019     if (line)
2020     {
2021         wxSize clientSize = GetClientSize();
2022         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
2023
2024         wxRichTextLine* newLine = GetFocusObject()->GetLineAtYPosition(newY);
2025         if (newLine)
2026         {
2027             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
2028             long pos = lineRange.GetStart()-1;
2029             if (pos != m_caretPosition)
2030             {
2031                 wxRichTextParagraph* para = GetFocusObject()->GetParagraphForLine(newLine);
2032
2033                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
2034                 if (!extendSel)
2035                     SelectNone();
2036
2037                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
2038                 PositionCaret();
2039                 SetDefaultStyleToCursorStyle();
2040
2041                 return true;
2042             }
2043         }
2044     }
2045
2046     return false;
2047 }
2048
2049 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
2050 {
2051     return str == wxT(" ") || str == wxT("\t");
2052 }
2053
2054 // Finds the caret position for the next word
2055 long wxRichTextCtrl::FindNextWordPosition(int direction) const
2056 {
2057     long endPos = GetFocusObject()->GetOwnRange().GetEnd();
2058
2059     if (direction > 0)
2060     {
2061         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
2062
2063         // First skip current text to space
2064         while (i < endPos && i > -1)
2065         {
2066             // i is in character, not caret positions
2067             wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(i, i));
2068             wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(i, false);
2069             if (line && (i == line->GetAbsoluteRange().GetEnd()))
2070             {
2071                 break;
2072             }
2073             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
2074                 i += direction;
2075             else
2076             {
2077                 break;
2078             }
2079         }
2080         while (i < endPos && i > -1)
2081         {
2082             // i is in character, not caret positions
2083             wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(i, i));
2084             wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(i, false);
2085             if (line && (i == line->GetAbsoluteRange().GetEnd()))
2086                 return wxMax(-1, i);
2087
2088             if (text.empty()) // End of paragraph, or maybe an image
2089                 return wxMax(-1, i - 1);
2090             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
2091                 i += direction;
2092             else
2093             {
2094                 // Convert to caret position
2095                 return wxMax(-1, i - 1);
2096             }
2097         }
2098         if (i >= endPos)
2099             return endPos-1;
2100         return i-1;
2101     }
2102     else
2103     {
2104         long i = m_caretPosition;
2105
2106         // First skip white space
2107         while (i < endPos && i > -1)
2108         {
2109             // i is in character, not caret positions
2110             wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(i, i));
2111             wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(i, false);
2112
2113             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
2114                 break;
2115             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
2116                 i += direction;
2117             else
2118                 break;
2119         }
2120         // Next skip current text to space
2121         while (i < endPos && i > -1)
2122         {
2123             // i is in character, not caret positions
2124             wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(i, i));
2125             wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(i, false);
2126             if (line && line->GetAbsoluteRange().GetStart() == i)
2127                 return i-1;
2128
2129             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
2130                 i += direction;
2131             else
2132             {
2133                 return i;
2134             }
2135         }
2136         if (i < -1)
2137             return -1;
2138         return i;
2139     }
2140 }
2141
2142 /// Move n words left
2143 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
2144 {
2145     long pos = FindNextWordPosition(-1);
2146     if (pos != m_caretPosition)
2147     {
2148         wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(pos, true);
2149
2150         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
2151         if (!extendSel)
2152             SelectNone();
2153
2154         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
2155         PositionCaret();
2156         SetDefaultStyleToCursorStyle();
2157
2158         return true;
2159     }
2160
2161     return false;
2162 }
2163
2164 /// Move n words right
2165 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
2166 {
2167     long pos = FindNextWordPosition(1);
2168     if (pos != m_caretPosition)
2169     {
2170         wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(pos, true);
2171
2172         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
2173         if (!extendSel)
2174             SelectNone();
2175
2176         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
2177         PositionCaret();
2178         SetDefaultStyleToCursorStyle();
2179
2180         return true;
2181     }
2182
2183     return false;
2184 }
2185
2186 /// Sizing
2187 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
2188 {
2189     // Only do sizing optimization for large buffers
2190     if (GetBuffer().GetOwnRange().GetEnd() > m_delayedLayoutThreshold)
2191     {
2192         m_fullLayoutRequired = true;
2193         m_fullLayoutTime = wxGetLocalTimeMillis();
2194         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
2195         LayoutContent(true /* onlyVisibleRect */);
2196     }
2197     else
2198         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2199
2200 #if wxRICHTEXT_BUFFERED_PAINTING
2201     RecreateBuffer();
2202 #endif
2203
2204     event.Skip();
2205 }
2206
2207
2208 /// Idle-time processing
2209 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
2210 {
2211 #if wxRICHTEXT_USE_OWN_CARET
2212     if (((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
2213     {
2214         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate(false);
2215         PositionCaret();
2216         GetCaret()->Show();
2217     }
2218 #endif
2219
2220     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
2221
2222     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
2223     {
2224         m_fullLayoutRequired = false;
2225         m_fullLayoutTime = 0;
2226         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2227         ShowPosition(m_fullLayoutSavedPosition);
2228         Refresh(false);
2229     }
2230
2231     if (m_caretPositionForDefaultStyle != -2)
2232     {
2233         // If the caret position has changed, no longer reflect the default style
2234         // in the UI.
2235         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
2236             m_caretPositionForDefaultStyle = -2;
2237     }
2238
2239     event.Skip();
2240 }
2241
2242 /// Scrolling
2243 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
2244 {
2245 #if wxRICHTEXT_USE_OWN_CARET
2246     if (!((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
2247     {
2248         GetCaret()->Hide();
2249         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate();
2250     }
2251 #endif
2252
2253     event.Skip();
2254 }
2255
2256 /// Set up scrollbars, e.g. after a resize
2257 void wxRichTextCtrl::SetupScrollbars(bool atTop)
2258 {
2259     if (IsFrozen())
2260         return;
2261
2262     if (GetBuffer().IsEmpty())
2263     {
2264         SetScrollbars(0, 0, 0, 0, 0, 0);
2265         return;
2266     }
2267
2268     // TODO: reimplement scrolling so we scroll by line, not by fixed number
2269     // of pixels. See e.g. wxVScrolledWindow for ideas.
2270     int pixelsPerUnit = 5;
2271     wxSize clientSize = GetClientSize();
2272
2273     int maxHeight = GetBuffer().GetCachedSize().y + GetBuffer().GetTopMargin();
2274
2275     // Round up so we have at least maxHeight pixels
2276     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
2277
2278     int startX = 0, startY = 0;
2279     if (!atTop)
2280         GetViewStart(& startX, & startY);
2281
2282     int maxPositionX = 0;
2283     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
2284
2285     int newStartX = wxMin(maxPositionX, startX);
2286     int newStartY = wxMin(maxPositionY, startY);
2287
2288     int oldPPUX, oldPPUY;
2289     int oldStartX, oldStartY;
2290     int oldVirtualSizeX = 0, oldVirtualSizeY = 0;
2291     GetScrollPixelsPerUnit(& oldPPUX, & oldPPUY);
2292     GetViewStart(& oldStartX, & oldStartY);
2293     GetVirtualSize(& oldVirtualSizeX, & oldVirtualSizeY);
2294     if (oldPPUY > 0)
2295         oldVirtualSizeY /= oldPPUY;
2296
2297     if (oldPPUX == 0 && oldPPUY == pixelsPerUnit && oldVirtualSizeY == unitsY && oldStartX == newStartX && oldStartY == newStartY)
2298         return;
2299
2300     // Don't set scrollbars if there were none before, and there will be none now.
2301     if (oldPPUY != 0 && (oldVirtualSizeY*oldPPUY < clientSize.y) && (unitsY*pixelsPerUnit < clientSize.y))
2302         return;
2303
2304     // Move to previous scroll position if
2305     // possible
2306     SetScrollbars(0, pixelsPerUnit, 0, unitsY, newStartX, newStartY);
2307 }
2308
2309 /// Paint the background
2310 void wxRichTextCtrl::PaintBackground(wxDC& dc)
2311 {
2312     wxColour backgroundColour = GetBackgroundColour();
2313     if (!backgroundColour.Ok())
2314         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
2315
2316     // Clear the background
2317     dc.SetBrush(wxBrush(backgroundColour));
2318     dc.SetPen(*wxTRANSPARENT_PEN);
2319     wxRect windowRect(GetClientSize());
2320     windowRect.x -= 2; windowRect.y -= 2;
2321     windowRect.width += 4; windowRect.height += 4;
2322
2323     // We need to shift the rectangle to take into account
2324     // scrolling. Converting device to logical coordinates.
2325     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
2326     dc.DrawRectangle(windowRect);
2327 }
2328
2329 #if wxRICHTEXT_BUFFERED_PAINTING
2330 /// Recreate buffer bitmap if necessary
2331 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
2332 {
2333     wxSize sz = size;
2334     if (sz == wxDefaultSize)
2335         sz = GetClientSize();
2336
2337     if (sz.x < 1 || sz.y < 1)
2338         return false;
2339
2340     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
2341         m_bufferBitmap = wxBitmap(sz.x, sz.y);
2342     return m_bufferBitmap.Ok();
2343 }
2344 #endif
2345
2346 // ----------------------------------------------------------------------------
2347 // file IO functions
2348 // ----------------------------------------------------------------------------
2349
2350 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
2351 {
2352     bool success = GetBuffer().LoadFile(filename, (wxRichTextFileType)fileType);
2353     if (success)
2354         m_filename = filename;
2355
2356     DiscardEdits();
2357     SetInsertionPoint(0);
2358     LayoutContent();
2359     PositionCaret();
2360     SetupScrollbars(true);
2361     Refresh(false);
2362     wxTextCtrl::SendTextUpdatedEvent(this);
2363
2364     if (success)
2365         return true;
2366     else
2367     {
2368         wxLogError(_("File couldn't be loaded."));
2369
2370         return false;
2371     }
2372 }
2373
2374 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
2375 {
2376     if (GetBuffer().SaveFile(filename, (wxRichTextFileType)fileType))
2377     {
2378         m_filename = filename;
2379
2380         DiscardEdits();
2381
2382         return true;
2383     }
2384
2385     wxLogError(_("The text couldn't be saved."));
2386
2387     return false;
2388 }
2389
2390 // ----------------------------------------------------------------------------
2391 // wxRichTextCtrl specific functionality
2392 // ----------------------------------------------------------------------------
2393
2394 /// Add a new paragraph of text to the end of the buffer
2395 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
2396 {
2397     wxRichTextRange range = GetFocusObject()->AddParagraph(text);
2398     GetBuffer().Invalidate();
2399     LayoutContent();
2400     return range;
2401 }
2402
2403 /// Add an image
2404 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
2405 {
2406     wxRichTextRange range = GetFocusObject()->AddImage(image);
2407     GetBuffer().Invalidate();
2408     LayoutContent();
2409     return range;
2410 }
2411
2412 // ----------------------------------------------------------------------------
2413 // selection and ranges
2414 // ----------------------------------------------------------------------------
2415
2416 void wxRichTextCtrl::SelectAll()
2417 {
2418     SetSelection(-1, -1);
2419 }
2420
2421 /// Select none
2422 void wxRichTextCtrl::SelectNone()
2423 {
2424     if (m_selection.IsValid())
2425     {
2426         wxRichTextSelection oldSelection = m_selection;
2427
2428         m_selection.Reset();
2429
2430         RefreshForSelectionChange(oldSelection, m_selection);
2431     }
2432     m_selectionAnchor = -2;
2433     m_selectionAnchorObject = NULL;
2434     m_selectionState = wxRichTextCtrlSelectionState_Normal;
2435 }
2436
2437 static bool wxIsWordDelimiter(const wxString& text)
2438 {
2439     return !text.IsEmpty() && !wxIsalnum(text[0]);
2440 }
2441
2442 /// Select the word at the given character position
2443 bool wxRichTextCtrl::SelectWord(long position)
2444 {
2445     if (position < 0 || position > GetFocusObject()->GetOwnRange().GetEnd())
2446         return false;
2447
2448     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(position);
2449     if (!para)
2450         return false;
2451
2452     if (position == para->GetRange().GetEnd())
2453         position --;
2454
2455     long positionStart = position;
2456     long positionEnd = position;
2457
2458     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
2459     {
2460         wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(positionStart, positionStart));
2461         if (wxIsWordDelimiter(text))
2462         {
2463             positionStart ++;
2464             break;
2465         }
2466     }
2467     if (positionStart < para->GetRange().GetStart())
2468         positionStart = para->GetRange().GetStart();
2469
2470     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
2471     {
2472         wxString text = GetFocusObject()->GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
2473         if (wxIsWordDelimiter(text))
2474         {
2475             positionEnd --;
2476             break;
2477         }
2478     }
2479     if (positionEnd >= para->GetRange().GetEnd())
2480         positionEnd = para->GetRange().GetEnd();
2481
2482     if (positionEnd < positionStart)
2483         return false;
2484
2485     SetSelection(positionStart, positionEnd+1);
2486
2487     if (positionStart >= 0)
2488     {
2489         MoveCaret(positionStart-1, true);
2490         SetDefaultStyleToCursorStyle();
2491     }
2492
2493     return true;
2494 }
2495
2496 wxString wxRichTextCtrl::GetStringSelection() const
2497 {
2498     long from, to;
2499     GetSelection(&from, &to);
2500
2501     return GetRange(from, to);
2502 }
2503
2504 // ----------------------------------------------------------------------------
2505 // hit testing
2506 // ----------------------------------------------------------------------------
2507
2508 wxTextCtrlHitTestResult
2509 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2510 {
2511     // implement in terms of the other overload as the native ports typically
2512     // can get the position and not (x, y) pair directly (although wxUniv
2513     // directly gets x and y -- and so overrides this method as well)
2514     long pos;
2515     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2516
2517     if ( rc != wxTE_HT_UNKNOWN )
2518     {
2519         PositionToXY(pos, x, y);
2520     }
2521
2522     return rc;
2523 }
2524
2525 wxTextCtrlHitTestResult
2526 wxRichTextCtrl::HitTest(const wxPoint& pt,
2527                         long * pos) const
2528 {
2529     wxClientDC dc((wxRichTextCtrl*) this);
2530     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2531
2532     // Buffer uses logical position (relative to start of buffer)
2533     // so convert
2534     wxPoint pt2 = GetLogicalPoint(pt);
2535
2536     wxRichTextObject* hitObj = NULL;
2537     wxRichTextObject* contextObj = NULL;
2538     int hit = ((wxRichTextCtrl*)this)->GetFocusObject()->HitTest(dc, pt2, *pos, & hitObj, & contextObj, wxRICHTEXT_HITTEST_NO_NESTED_OBJECTS);
2539
2540     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2541         return wxTE_HT_BEFORE;
2542     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2543         return wxTE_HT_BEYOND;
2544     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2545         return wxTE_HT_ON_TEXT;
2546
2547     return wxTE_HT_UNKNOWN;
2548 }
2549
2550 // ----------------------------------------------------------------------------
2551 // set/get the controls text
2552 // ----------------------------------------------------------------------------
2553
2554 wxString wxRichTextCtrl::DoGetValue() const
2555 {
2556     return GetBuffer().GetText();
2557 }
2558
2559 wxString wxRichTextCtrl::GetRange(long from, long to) const
2560 {
2561     // Public API for range is different from internals
2562     return GetFocusObject()->GetTextForRange(wxRichTextRange(from, to-1));
2563 }
2564
2565 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2566 {
2567     // Don't call Clear here, since it always sends a text updated event
2568     m_buffer.ResetAndClearCommands();
2569     m_buffer.Invalidate(wxRICHTEXT_ALL);
2570     m_caretPosition = -1;
2571     m_caretPositionForDefaultStyle = -2;
2572     m_caretAtLineStart = false;
2573     m_selection.Reset();
2574     m_selectionState = wxRichTextCtrlSelectionState_Normal;
2575
2576     Scroll(0,0);
2577
2578     if (!IsFrozen())
2579     {
2580         LayoutContent();
2581         Refresh(false);
2582     }
2583
2584     if (!value.IsEmpty())
2585     {
2586         // Remove empty paragraph
2587         GetBuffer().Clear();
2588         DoWriteText(value, flags);
2589
2590         // for compatibility, don't move the cursor when doing SetValue()
2591         SetInsertionPoint(0);
2592     }
2593     else
2594     {
2595         // still send an event for consistency
2596         if (flags & SetValue_SendEvent)
2597             wxTextCtrl::SendTextUpdatedEvent(this);
2598     }
2599     DiscardEdits();
2600 }
2601
2602 void wxRichTextCtrl::WriteText(const wxString& value)
2603 {
2604     DoWriteText(value);
2605 }
2606
2607 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2608 {
2609     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2610
2611     GetFocusObject()->InsertTextWithUndo(m_caretPosition+1, valueUnix, this, & GetBuffer(), wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2612
2613     if ( flags & SetValue_SendEvent )
2614         wxTextCtrl::SendTextUpdatedEvent(this);
2615 }
2616
2617 void wxRichTextCtrl::AppendText(const wxString& text)
2618 {
2619     SetInsertionPointEnd();
2620
2621     WriteText(text);
2622 }
2623
2624 /// Write an image at the current insertion point
2625 bool wxRichTextCtrl::WriteImage(const wxImage& image, wxBitmapType bitmapType, const wxRichTextAttr& textAttr)
2626 {
2627     wxRichTextImageBlock imageBlock;
2628
2629     wxImage image2 = image;
2630     if (imageBlock.MakeImageBlock(image2, bitmapType))
2631         return WriteImage(imageBlock, textAttr);
2632
2633     return false;
2634 }
2635
2636 bool wxRichTextCtrl::WriteImage(const wxString& filename, wxBitmapType bitmapType, const wxRichTextAttr& textAttr)
2637 {
2638     wxRichTextImageBlock imageBlock;
2639
2640     wxImage image;
2641     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2642         return WriteImage(imageBlock, textAttr);
2643
2644     return false;
2645 }
2646
2647 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock, const wxRichTextAttr& textAttr)
2648 {
2649     return GetFocusObject()->InsertImageWithUndo(m_caretPosition+1, imageBlock, this, & GetBuffer(), 0, textAttr);
2650 }
2651
2652 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, wxBitmapType bitmapType, const wxRichTextAttr& textAttr)
2653 {
2654     if (bitmap.Ok())
2655     {
2656         wxRichTextImageBlock imageBlock;
2657
2658         wxImage image = bitmap.ConvertToImage();
2659         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2660             return WriteImage(imageBlock, textAttr);
2661     }
2662
2663     return false;
2664 }
2665
2666 // Write a text box at the current insertion point.
2667 wxRichTextBox* wxRichTextCtrl::WriteTextBox(const wxRichTextAttr& textAttr)
2668 {
2669     wxRichTextBox* textBox = new wxRichTextBox;
2670     textBox->SetAttributes(textAttr);
2671     textBox->SetParent(& GetBuffer()); // set parent temporarily for AddParagraph to use correct style
2672     textBox->AddParagraph(wxEmptyString);
2673     textBox->SetParent(NULL);
2674
2675     // The object returned is the one actually inserted into the buffer,
2676     // while the original one is deleted.
2677     wxRichTextObject* obj = GetFocusObject()->InsertObjectWithUndo(m_caretPosition+1, textBox, this, & GetBuffer(), wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2678     wxRichTextBox* box = wxDynamicCast(obj, wxRichTextBox);
2679     return box;
2680 }
2681
2682 // Write a table at the current insertion point, returning the table.
2683 wxRichTextTable* wxRichTextCtrl::WriteTable(int rows, int cols, const wxRichTextAttr& tableAttr, const wxRichTextAttr& cellAttr)
2684 {
2685     wxASSERT(rows > 0 && cols > 0);
2686
2687     if (rows <= 0 || cols <= 0)
2688         return NULL;
2689
2690     wxRichTextTable* table = new wxRichTextTable;
2691     table->SetAttributes(tableAttr);
2692     table->SetParent(& GetBuffer()); // set parent temporarily for AddParagraph to use correct style
2693
2694     table->CreateTable(rows, cols);
2695
2696     table->SetParent(NULL);
2697
2698     int i, j;
2699     for (j = 0; j < rows; j++)
2700     {
2701         for (i = 0; i < cols; i++)
2702         {
2703             table->GetCell(j, i)->GetAttributes() = cellAttr;
2704         }
2705     }
2706
2707     // The object returned is the one actually inserted into the buffer,
2708     // while the original one is deleted.
2709     wxRichTextObject* obj = GetFocusObject()->InsertObjectWithUndo(m_caretPosition+1, table, this, & GetBuffer(), wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2710     wxRichTextTable* tableResult = wxDynamicCast(obj, wxRichTextTable);
2711     return tableResult;
2712 }
2713
2714
2715 /// Insert a newline (actually paragraph) at the current insertion point.
2716 bool wxRichTextCtrl::Newline()
2717 {
2718     return GetFocusObject()->InsertNewlineWithUndo(m_caretPosition+1, this, & GetBuffer(), wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2719 }
2720
2721 /// Insert a line break at the current insertion point.
2722 bool wxRichTextCtrl::LineBreak()
2723 {
2724     wxString text;
2725     text = wxRichTextLineBreakChar;
2726     return GetFocusObject()->InsertTextWithUndo(m_caretPosition+1, text, this, & GetBuffer());
2727 }
2728
2729 // ----------------------------------------------------------------------------
2730 // Clipboard operations
2731 // ----------------------------------------------------------------------------
2732
2733 void wxRichTextCtrl::Copy()
2734 {
2735     if (CanCopy())
2736     {
2737         wxRichTextRange range = GetInternalSelectionRange();
2738         GetBuffer().CopyToClipboard(range);
2739     }
2740 }
2741
2742 void wxRichTextCtrl::Cut()
2743 {
2744     if (CanCut())
2745     {
2746         wxRichTextRange range = GetInternalSelectionRange();
2747         GetBuffer().CopyToClipboard(range);
2748
2749         DeleteSelectedContent();
2750         LayoutContent();
2751         Refresh(false);
2752     }
2753 }
2754
2755 void wxRichTextCtrl::Paste()
2756 {
2757     if (CanPaste())
2758     {
2759         BeginBatchUndo(_("Paste"));
2760
2761         long newPos = m_caretPosition;
2762         DeleteSelectedContent(& newPos);
2763
2764         GetBuffer().PasteFromClipboard(newPos);
2765
2766         EndBatchUndo();
2767     }
2768 }
2769
2770 void wxRichTextCtrl::DeleteSelection()
2771 {
2772     if (CanDeleteSelection())
2773     {
2774         DeleteSelectedContent();
2775     }
2776 }
2777
2778 bool wxRichTextCtrl::HasSelection() const
2779 {
2780     return (m_selection.IsValid() && m_selection.GetContainer() == GetFocusObject());
2781 }
2782
2783 bool wxRichTextCtrl::HasUnfocusedSelection() const
2784 {
2785     return m_selection.IsValid();
2786 }
2787
2788 bool wxRichTextCtrl::CanCopy() const
2789 {
2790     // Can copy if there's a selection
2791     return HasSelection();
2792 }
2793
2794 bool wxRichTextCtrl::CanCut() const
2795 {
2796     return HasSelection() && IsEditable();
2797 }
2798
2799 bool wxRichTextCtrl::CanPaste() const
2800 {
2801     if ( !IsEditable() )
2802         return false;
2803
2804     return GetBuffer().CanPasteFromClipboard();
2805 }
2806
2807 bool wxRichTextCtrl::CanDeleteSelection() const
2808 {
2809     return HasSelection() && IsEditable();
2810 }
2811
2812
2813 // ----------------------------------------------------------------------------
2814 // Accessors
2815 // ----------------------------------------------------------------------------
2816
2817 void wxRichTextCtrl::SetContextMenu(wxMenu* menu)
2818 {
2819     if (m_contextMenu && m_contextMenu != menu)
2820         delete m_contextMenu;
2821     m_contextMenu = menu;
2822 }
2823
2824 void wxRichTextCtrl::SetEditable(bool editable)
2825 {
2826     m_editable = editable;
2827 }
2828
2829 void wxRichTextCtrl::SetInsertionPoint(long pos)
2830 {
2831     SelectNone();
2832
2833     m_caretPosition = pos - 1;
2834
2835     PositionCaret();
2836
2837     SetDefaultStyleToCursorStyle();
2838 }
2839
2840 void wxRichTextCtrl::SetInsertionPointEnd()
2841 {
2842     long pos = GetLastPosition();
2843     SetInsertionPoint(pos);
2844 }
2845
2846 long wxRichTextCtrl::GetInsertionPoint() const
2847 {
2848     return m_caretPosition+1;
2849 }
2850
2851 wxTextPos wxRichTextCtrl::GetLastPosition() const
2852 {
2853     return GetFocusObject()->GetOwnRange().GetEnd();
2854 }
2855
2856 // If the return values from and to are the same, there is no
2857 // selection.
2858 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2859 {
2860     if (m_selection.IsValid())
2861     {
2862         *from = m_selection.GetRange().GetStart();
2863         *to = m_selection.GetRange().GetEnd();
2864         (*to) ++;
2865     }
2866     else
2867     {
2868         *from = -2;
2869         *to = -2;
2870     }
2871 }
2872
2873 bool wxRichTextCtrl::IsEditable() const
2874 {
2875     return m_editable;
2876 }
2877
2878 // ----------------------------------------------------------------------------
2879 // selection
2880 // ----------------------------------------------------------------------------
2881
2882 void wxRichTextCtrl::SetSelection(long from, long to)
2883 {
2884     // if from and to are both -1, it means (in wxWidgets) that all text should
2885     // be selected.
2886     if ( (from == -1) && (to == -1) )
2887     {
2888         from = 0;
2889         to = GetLastPosition()+1;
2890     }
2891
2892     if (from == to)
2893     {
2894         SelectNone();
2895     }
2896     else
2897     {
2898         wxRichTextSelection oldSelection = m_selection;
2899
2900         m_selectionAnchor = from-1;
2901         m_selectionAnchorObject = NULL;
2902         m_selection.Set(wxRichTextRange(from, to-1), GetFocusObject());
2903
2904         m_caretPosition = wxMax(-1, to-1);
2905
2906         RefreshForSelectionChange(oldSelection, m_selection);
2907         PositionCaret();
2908     }
2909 }
2910
2911 // ----------------------------------------------------------------------------
2912 // Editing
2913 // ----------------------------------------------------------------------------
2914
2915 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2916                              const wxString& value)
2917 {
2918     BeginBatchUndo(_("Replace"));
2919
2920     DeleteSelectedContent();
2921
2922     DoWriteText(value, SetValue_SelectionOnly);
2923
2924     EndBatchUndo();
2925 }
2926
2927 void wxRichTextCtrl::Remove(long from, long to)
2928 {
2929     SelectNone();
2930
2931     GetFocusObject()->DeleteRangeWithUndo(wxRichTextRange(from, to-1), this, & GetBuffer());
2932
2933     LayoutContent();
2934     if (!IsFrozen())
2935         Refresh(false);
2936 }
2937
2938 bool wxRichTextCtrl::IsModified() const
2939 {
2940     return m_buffer.IsModified();
2941 }
2942
2943 void wxRichTextCtrl::MarkDirty()
2944 {
2945     m_buffer.Modify(true);
2946 }
2947
2948 void wxRichTextCtrl::DiscardEdits()
2949 {
2950     m_caretPositionForDefaultStyle = -2;
2951     m_buffer.Modify(false);
2952     m_buffer.GetCommandProcessor()->ClearCommands();
2953 }
2954
2955 int wxRichTextCtrl::GetNumberOfLines() const
2956 {
2957     return GetFocusObject()->GetParagraphCount();
2958 }
2959
2960 // ----------------------------------------------------------------------------
2961 // Positions <-> coords
2962 // ----------------------------------------------------------------------------
2963
2964 long wxRichTextCtrl::XYToPosition(long x, long y) const
2965 {
2966     return GetFocusObject()->XYToPosition(x, y);
2967 }
2968
2969 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2970 {
2971     return GetFocusObject()->PositionToXY(pos, x, y);
2972 }
2973
2974 // ----------------------------------------------------------------------------
2975 //
2976 // ----------------------------------------------------------------------------
2977
2978 void wxRichTextCtrl::ShowPosition(long pos)
2979 {
2980     if (!IsPositionVisible(pos))
2981         ScrollIntoView(pos-1, WXK_DOWN);
2982 }
2983
2984 int wxRichTextCtrl::GetLineLength(long lineNo) const
2985 {
2986     return GetFocusObject()->GetParagraphLength(lineNo);
2987 }
2988
2989 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2990 {
2991     return GetFocusObject()->GetParagraphText(lineNo);
2992 }
2993
2994 // ----------------------------------------------------------------------------
2995 // Undo/redo
2996 // ----------------------------------------------------------------------------
2997
2998 void wxRichTextCtrl::Undo()
2999 {
3000     if (CanUndo())
3001     {
3002         GetCommandProcessor()->Undo();
3003     }
3004 }
3005
3006 void wxRichTextCtrl::Redo()
3007 {
3008     if (CanRedo())
3009     {
3010         GetCommandProcessor()->Redo();
3011     }
3012 }
3013
3014 bool wxRichTextCtrl::CanUndo() const
3015 {
3016     return GetCommandProcessor()->CanUndo() && IsEditable();
3017 }
3018
3019 bool wxRichTextCtrl::CanRedo() const
3020 {
3021     return GetCommandProcessor()->CanRedo() && IsEditable();
3022 }
3023
3024 // ----------------------------------------------------------------------------
3025 // implementation details
3026 // ----------------------------------------------------------------------------
3027
3028 void wxRichTextCtrl::Command(wxCommandEvent& event)
3029 {
3030     SetValue(event.GetString());
3031     GetEventHandler()->ProcessEvent(event);
3032 }
3033
3034 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
3035 {
3036     // By default, load the first file into the text window.
3037     if (event.GetNumberOfFiles() > 0)
3038     {
3039         LoadFile(event.GetFiles()[0]);
3040     }
3041 }
3042
3043 wxSize wxRichTextCtrl::DoGetBestSize() const
3044 {
3045     return wxSize(10, 10);
3046 }
3047
3048 // ----------------------------------------------------------------------------
3049 // standard handlers for standard edit menu events
3050 // ----------------------------------------------------------------------------
3051
3052 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
3053 {
3054     Cut();
3055 }
3056
3057 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
3058 {
3059     DeleteSelection();
3060 }
3061
3062 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
3063 {
3064     Copy();
3065 }
3066
3067 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
3068 {
3069     Paste();
3070 }
3071
3072 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
3073 {
3074     Undo();
3075 }
3076
3077 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
3078 {
3079     Redo();
3080 }
3081
3082 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
3083 {
3084     event.Enable( CanCut() );
3085 }
3086
3087 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
3088 {
3089     event.Enable( CanCopy() );
3090 }
3091
3092 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
3093 {
3094     event.Enable( CanDeleteSelection() );
3095 }
3096
3097 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
3098 {
3099     event.Enable( CanPaste() );
3100 }
3101
3102 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
3103 {
3104     event.Enable( CanUndo() );
3105     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
3106 }
3107
3108 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
3109 {
3110     event.Enable( CanRedo() );
3111     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
3112 }
3113
3114 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
3115 {
3116     if (GetLastPosition() > 0)
3117         SelectAll();
3118 }
3119
3120 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
3121 {
3122     event.Enable(GetLastPosition() > 0);
3123 }
3124
3125 void wxRichTextCtrl::OnProperties(wxCommandEvent& event)
3126 {
3127     int idx = event.GetId() - wxID_RICHTEXT_PROPERTIES1;
3128     if (idx >= 0 && idx < m_contextMenuPropertiesInfo.GetCount())
3129     {
3130         wxRichTextObject* obj = m_contextMenuPropertiesInfo.GetObject(idx);
3131         if (obj && obj->CanEditProperties())
3132             obj->EditProperties(this, & GetBuffer());
3133
3134         m_contextMenuPropertiesInfo.Clear();
3135     }
3136 }
3137
3138 void wxRichTextCtrl::OnUpdateProperties(wxUpdateUIEvent& event)
3139 {
3140     int idx = event.GetId() - wxID_RICHTEXT_PROPERTIES1;
3141     event.Enable(idx >= 0 && idx < m_contextMenuPropertiesInfo.GetCount());
3142 }
3143
3144 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
3145 {
3146     if (event.GetEventObject() != this)
3147     {
3148         event.Skip();
3149         return;
3150     }
3151
3152     wxClientDC dc(this);
3153     PrepareDC(dc);
3154     dc.SetFont(GetFont());
3155
3156     long position = 0;
3157     wxPoint pt = event.GetPosition();
3158     wxPoint logicalPt = GetLogicalPoint(ScreenToClient(pt));
3159     wxRichTextObject* hitObj = NULL;
3160     wxRichTextObject* contextObj = NULL;
3161     int hit = GetFocusObject()->HitTest(dc, logicalPt, position, & hitObj, & contextObj);
3162
3163     m_contextMenuPropertiesInfo.Clear();
3164
3165     if (hit == wxRICHTEXT_HITTEST_ON || hit == wxRICHTEXT_HITTEST_BEFORE || hit == wxRICHTEXT_HITTEST_AFTER)
3166     {
3167         wxRichTextParagraphLayoutBox* actualContainer = wxDynamicCast(contextObj, wxRichTextParagraphLayoutBox);
3168         if (hitObj && actualContainer)
3169         {
3170             if (actualContainer->AcceptsFocus())
3171             {
3172                 SetFocusObject(actualContainer, false /* don't set caret position yet */);
3173                 SetCaretPositionAfterClick(actualContainer, position, hit);
3174             }
3175
3176             m_contextMenuPropertiesInfo.AddItems(actualContainer, hitObj);
3177         }
3178         else
3179             m_contextMenuPropertiesInfo.AddItems(GetFocusObject(), NULL);
3180     }
3181     else
3182     {
3183         m_contextMenuPropertiesInfo.AddItems(GetFocusObject(), NULL);
3184     }
3185
3186     if (m_contextMenu)
3187     {
3188         m_contextMenuPropertiesInfo.AddMenuItems(m_contextMenu);
3189         PopupMenu(m_contextMenu);
3190     }
3191 }
3192
3193 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
3194 {
3195     return GetFocusObject()->SetStyle(wxRichTextRange(start, end-1), wxRichTextAttr(style));
3196 }
3197
3198 bool wxRichTextCtrl::SetStyle(long start, long end, const wxRichTextAttr& style)
3199 {
3200     return GetFocusObject()->SetStyle(wxRichTextRange(start, end-1), style);
3201 }
3202
3203 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxTextAttr& style)
3204 {
3205     return GetFocusObject()->SetStyle(range.ToInternal(), wxRichTextAttr(style));
3206 }
3207
3208 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxRichTextAttr& style)
3209 {
3210     return GetFocusObject()->SetStyle(range.ToInternal(), style);
3211 }
3212
3213 void wxRichTextCtrl::SetStyle(wxRichTextObject *obj, const wxRichTextAttr& textAttr)
3214 {
3215     GetFocusObject()->SetStyle(obj, textAttr);
3216 }
3217
3218 // extended style setting operation with flags including:
3219 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
3220 // see richtextbuffer.h for more details.
3221
3222 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxRichTextAttr& style, int flags)
3223 {
3224     return GetFocusObject()->SetStyle(range.ToInternal(), style, flags);
3225 }
3226
3227 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
3228 {
3229     return GetBuffer().SetDefaultStyle(style);
3230 }
3231
3232 bool wxRichTextCtrl::SetDefaultStyle(const wxRichTextAttr& style)
3233 {
3234     wxRichTextAttr attr1(style);
3235     attr1.GetTextBoxAttr().Reset();
3236     return GetBuffer().SetDefaultStyle(attr1);
3237 }
3238
3239 const wxRichTextAttr& wxRichTextCtrl::GetDefaultStyleEx() const
3240 {
3241     return GetBuffer().GetDefaultStyle();
3242 }
3243
3244 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
3245 {
3246     wxRichTextAttr attr;
3247     if (GetFocusObject()->GetStyle(position, attr))
3248     {
3249         style = attr;
3250         return true;
3251     }
3252     else
3253         return false;
3254 }
3255
3256 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style)
3257 {
3258     return GetFocusObject()->GetStyle(position, style);
3259 }
3260
3261 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style, wxRichTextParagraphLayoutBox* container)
3262 {
3263     wxRichTextAttr attr;
3264     if (container->GetStyle(position, attr))
3265     {
3266         style = attr;
3267         return true;
3268     }
3269     else
3270         return false;
3271 }
3272
3273 // get the common set of styles for the range
3274 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttr& style)
3275 {
3276     wxRichTextAttr attr;
3277     if (GetFocusObject()->GetStyleForRange(range.ToInternal(), attr))
3278     {
3279         style = attr;
3280         return true;
3281     }
3282     else
3283         return false;
3284 }
3285
3286 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxRichTextAttr& style)
3287 {
3288     return GetFocusObject()->GetStyleForRange(range.ToInternal(), style);
3289 }
3290
3291 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxRichTextAttr& style, wxRichTextParagraphLayoutBox* container)
3292 {
3293     return container->GetStyleForRange(range.ToInternal(), style);
3294 }
3295
3296 /// Get the content (uncombined) attributes for this position.
3297 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style)
3298 {
3299     return GetFocusObject()->GetUncombinedStyle(position, style);
3300 }
3301
3302 /// Get the content (uncombined) attributes for this position.
3303 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style, wxRichTextParagraphLayoutBox* container)
3304 {
3305     return container->GetUncombinedStyle(position, style);
3306 }
3307
3308 /// Set font, and also the buffer attributes
3309 bool wxRichTextCtrl::SetFont(const wxFont& font)
3310 {
3311     wxControl::SetFont(font);
3312
3313     wxRichTextAttr attr = GetBuffer().GetAttributes();
3314     attr.SetFont(font);
3315     GetBuffer().SetBasicStyle(attr);
3316
3317     GetBuffer().Invalidate(wxRICHTEXT_ALL);
3318     Refresh(false);
3319
3320     return true;
3321 }
3322
3323 /// Transform logical to physical
3324 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
3325 {
3326     wxPoint pt;
3327     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
3328
3329     return pt;
3330 }
3331
3332 /// Transform physical to logical
3333 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
3334 {
3335     wxPoint pt;
3336     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
3337
3338     return pt;
3339 }
3340
3341 /// Position the caret
3342 void wxRichTextCtrl::PositionCaret(wxRichTextParagraphLayoutBox* container)
3343 {
3344     if (!GetCaret())
3345         return;
3346
3347     //wxLogDebug(wxT("PositionCaret"));
3348
3349     wxRect caretRect;
3350     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect, container))
3351     {
3352         wxPoint newPt = caretRect.GetPosition();
3353         wxSize newSz = caretRect.GetSize();
3354         wxPoint pt = GetPhysicalPoint(newPt);
3355         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
3356         {
3357             GetCaret()->Hide();
3358             if (GetCaret()->GetSize() != newSz)
3359                 GetCaret()->SetSize(newSz);
3360
3361             int halfSize = newSz.y/2;
3362             // If the caret is beyond the margin, hide it by moving it out of the way
3363             if (((pt.y + halfSize) < GetBuffer().GetTopMargin()) || ((pt.y + halfSize) > (GetClientSize().y - GetBuffer().GetBottomMargin())))
3364             {
3365                 pt.x = -200;
3366                 pt.y = -200;
3367             }
3368
3369             GetCaret()->Move(pt);
3370             GetCaret()->Show();
3371         }
3372     }
3373 }
3374
3375 /// Get the caret height and position for the given character position
3376 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect, wxRichTextParagraphLayoutBox* container)
3377 {
3378     wxClientDC dc(this);
3379     dc.SetFont(GetFont());
3380
3381     PrepareDC(dc);
3382
3383     wxPoint pt;
3384     int height = 0;
3385
3386     if (!container)
3387         container = GetFocusObject();
3388
3389     if (container->FindPosition(dc, position, pt, & height, m_caretAtLineStart))
3390     {
3391         // Caret height can't be zero
3392         if (height == 0)
3393             height = dc.GetCharHeight();
3394
3395         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
3396         return true;
3397     }
3398
3399     return false;
3400 }
3401
3402 /// Gets the line for the visible caret position. If the caret is
3403 /// shown at the very end of the line, it means the next character is actually
3404 /// on the following line. So let's get the line we're expecting to find
3405 /// if this is the case.
3406 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
3407 {
3408     wxRichTextLine* line = GetFocusObject()->GetLineAtPosition(caretPosition, true);
3409     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(caretPosition, true);
3410     if (line)
3411     {
3412         wxRichTextRange lineRange = line->GetAbsoluteRange();
3413         if (caretPosition == lineRange.GetStart()-1 &&
3414             (para->GetRange().GetStart() != lineRange.GetStart()))
3415         {
3416             if (!m_caretAtLineStart)
3417                 line = GetFocusObject()->GetLineAtPosition(caretPosition-1, true);
3418         }
3419     }
3420     return line;
3421 }
3422
3423
3424 /// Move the caret to the given character position
3425 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart, wxRichTextParagraphLayoutBox* container)
3426 {
3427     if (GetBuffer().IsDirty())
3428         LayoutContent();
3429
3430     if (!container)
3431         container = GetFocusObject();
3432
3433     if (pos <= container->GetOwnRange().GetEnd())
3434     {
3435         SetCaretPosition(pos, showAtLineStart);
3436
3437         PositionCaret(container);
3438
3439         return true;
3440     }
3441     else
3442         return false;
3443 }
3444
3445 /// Layout the buffer: which we must do before certain operations, such as
3446 /// setting the caret position.
3447 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
3448 {
3449     if (GetBuffer().IsDirty() || onlyVisibleRect)
3450     {
3451         wxRect availableSpace(GetClientSize());
3452         if (availableSpace.width == 0)
3453             availableSpace.width = 10;
3454         if (availableSpace.height == 0)
3455             availableSpace.height = 10;
3456
3457         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
3458         if (onlyVisibleRect)
3459         {
3460             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
3461             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
3462         }
3463
3464         wxClientDC dc(this);
3465         dc.SetFont(GetFont());
3466
3467         PrepareDC(dc);
3468
3469         GetBuffer().Defragment();
3470         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
3471         GetBuffer().Layout(dc, availableSpace, flags);
3472         GetBuffer().Invalidate(wxRICHTEXT_NONE);
3473
3474         if (!IsFrozen())
3475             SetupScrollbars();
3476     }
3477
3478     return true;
3479 }
3480
3481 /// Is all of the selection bold?
3482 bool wxRichTextCtrl::IsSelectionBold()
3483 {
3484     if (HasSelection())
3485     {
3486         wxRichTextAttr attr;
3487         wxRichTextRange range = GetSelectionRange();
3488         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3489         attr.SetFontWeight(wxFONTWEIGHT_BOLD);
3490
3491         return HasCharacterAttributes(range, attr);
3492     }
3493     else
3494     {
3495         // If no selection, then we need to combine current style with default style
3496         // to see what the effect would be if we started typing.
3497         wxRichTextAttr attr;
3498         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3499
3500         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3501         if (GetStyle(pos, attr))
3502         {
3503             if (IsDefaultStyleShowing())
3504                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3505             return attr.GetFontWeight() == wxFONTWEIGHT_BOLD;
3506         }
3507     }
3508     return false;
3509 }
3510
3511 /// Is all of the selection italics?
3512 bool wxRichTextCtrl::IsSelectionItalics()
3513 {
3514     if (HasSelection())
3515     {
3516         wxRichTextRange range = GetSelectionRange();
3517         wxRichTextAttr attr;
3518         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3519         attr.SetFontStyle(wxFONTSTYLE_ITALIC);
3520
3521         return HasCharacterAttributes(range, attr);
3522     }
3523     else
3524     {
3525         // If no selection, then we need to combine current style with default style
3526         // to see what the effect would be if we started typing.
3527         wxRichTextAttr attr;
3528         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3529
3530         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3531         if (GetStyle(pos, attr))
3532         {
3533             if (IsDefaultStyleShowing())
3534                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3535             return attr.GetFontStyle() == wxFONTSTYLE_ITALIC;
3536         }
3537     }
3538     return false;
3539 }
3540
3541 /// Is all of the selection underlined?
3542 bool wxRichTextCtrl::IsSelectionUnderlined()
3543 {
3544     if (HasSelection())
3545     {
3546         wxRichTextRange range = GetSelectionRange();
3547         wxRichTextAttr attr;
3548         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3549         attr.SetFontUnderlined(true);
3550
3551         return HasCharacterAttributes(range, attr);
3552     }
3553     else
3554     {
3555         // If no selection, then we need to combine current style with default style
3556         // to see what the effect would be if we started typing.
3557         wxRichTextAttr attr;
3558         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3559         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3560
3561         if (GetStyle(pos, attr))
3562         {
3563             if (IsDefaultStyleShowing())
3564                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3565             return attr.GetFontUnderlined();
3566         }
3567     }
3568     return false;
3569 }
3570
3571 /// Apply bold to the selection
3572 bool wxRichTextCtrl::ApplyBoldToSelection()
3573 {
3574     wxRichTextAttr attr;
3575     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3576     attr.SetFontWeight(IsSelectionBold() ? wxFONTWEIGHT_NORMAL : wxFONTWEIGHT_BOLD);
3577
3578     if (HasSelection())
3579         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3580     else
3581     {
3582         wxRichTextAttr current = GetDefaultStyleEx();
3583         current.Apply(attr);
3584         SetAndShowDefaultStyle(current);
3585     }
3586     return true;
3587 }
3588
3589 /// Apply italic to the selection
3590 bool wxRichTextCtrl::ApplyItalicToSelection()
3591 {
3592     wxRichTextAttr attr;
3593     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3594     attr.SetFontStyle(IsSelectionItalics() ? wxFONTSTYLE_NORMAL : wxFONTSTYLE_ITALIC);
3595
3596     if (HasSelection())
3597         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3598     else
3599     {
3600         wxRichTextAttr current = GetDefaultStyleEx();
3601         current.Apply(attr);
3602         SetAndShowDefaultStyle(current);
3603     }
3604     return true;
3605 }
3606
3607 /// Apply underline to the selection
3608 bool wxRichTextCtrl::ApplyUnderlineToSelection()
3609 {
3610     wxRichTextAttr attr;
3611     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3612     attr.SetFontUnderlined(!IsSelectionUnderlined());
3613
3614     if (HasSelection())
3615         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3616     else
3617     {
3618         wxRichTextAttr current = GetDefaultStyleEx();
3619         current.Apply(attr);
3620         SetAndShowDefaultStyle(current);
3621     }
3622     return true;
3623 }
3624
3625 /// Is all of the selection aligned according to the specified flag?
3626 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
3627 {
3628     wxRichTextRange range;
3629     if (HasSelection())
3630         range = GetSelectionRange();
3631     else
3632         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
3633
3634     wxRichTextAttr attr;
3635     attr.SetAlignment(alignment);
3636
3637     return HasParagraphAttributes(range, attr);
3638 }
3639
3640 /// Apply alignment to the selection
3641 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
3642 {
3643     wxRichTextAttr attr;
3644     attr.SetAlignment(alignment);
3645     if (HasSelection())
3646         return SetStyle(GetSelectionRange(), attr);
3647     else
3648     {
3649         wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(GetCaretPosition()+1);
3650         if (para)
3651             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
3652     }
3653     return true;
3654 }
3655
3656 /// Apply a named style to the selection
3657 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
3658 {
3659     // Flags are defined within each definition, so only certain
3660     // attributes are applied.
3661     wxRichTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
3662
3663     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_RESET;
3664
3665     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
3666     {
3667         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3668
3669         wxRichTextRange range;
3670
3671         if (HasSelection())
3672             range = GetSelectionRange();
3673         else
3674         {
3675             long pos = GetAdjustedCaretPosition(GetCaretPosition());
3676             range = wxRichTextRange(pos, pos+1);
3677         }
3678
3679         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
3680     }
3681
3682     bool isPara = false;
3683
3684     // Make sure the attr has the style name
3685     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
3686     {
3687         isPara = true;
3688         attr.SetParagraphStyleName(def->GetName());
3689
3690         // If applying a paragraph style, we only want the paragraph nodes to adopt these
3691         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
3692         // to change its style independently.
3693         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3694     }
3695     else
3696         attr.SetCharacterStyleName(def->GetName());
3697
3698     if (HasSelection())
3699         return SetStyleEx(GetSelectionRange(), attr, flags);
3700     else
3701     {
3702         wxRichTextAttr current = GetDefaultStyleEx();
3703         wxRichTextAttr defaultStyle(attr);
3704         if (isPara)
3705         {
3706             // Don't apply extra character styles since they are already implied
3707             // in the paragraph style
3708             defaultStyle.SetFlags(defaultStyle.GetFlags() & ~wxTEXT_ATTR_CHARACTER);
3709         }
3710         current.Apply(defaultStyle);
3711         SetAndShowDefaultStyle(current);
3712
3713         // If it's a paragraph style, we want to apply the style to the
3714         // current paragraph even if we didn't select any text.
3715         if (isPara)
3716         {
3717             long pos = GetAdjustedCaretPosition(GetCaretPosition());
3718             wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(pos);
3719             if (para)
3720             {
3721                 return SetStyleEx(para->GetRange().FromInternal(), attr, flags);
3722             }
3723         }
3724         return true;
3725     }
3726 }
3727
3728 /// Apply the style sheet to the buffer, for example if the styles have changed.
3729 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
3730 {
3731     if (!styleSheet)
3732         styleSheet = GetBuffer().GetStyleSheet();
3733     if (!styleSheet)
3734         return false;
3735
3736     if (GetBuffer().ApplyStyleSheet(styleSheet))
3737     {
3738         GetBuffer().Invalidate(wxRICHTEXT_ALL);
3739         Refresh(false);
3740         return true;
3741     }
3742     else
3743         return false;
3744 }
3745
3746 /// Sets the default style to the style under the cursor
3747 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3748 {
3749     wxRichTextAttr attr;
3750     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3751
3752     // If at the start of a paragraph, use the next position.
3753     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3754
3755     if (GetUncombinedStyle(pos, attr))
3756     {
3757         SetDefaultStyle(attr);
3758         return true;
3759     }
3760
3761     return false;
3762 }
3763
3764 /// Returns the first visible position in the current view
3765 long wxRichTextCtrl::GetFirstVisiblePosition() const
3766 {
3767     wxRichTextLine* line = GetFocusObject()->GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3768     if (line)
3769         return line->GetAbsoluteRange().GetStart();
3770     else
3771         return 0;
3772 }
3773
3774 /// Get the first visible point in the window
3775 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3776 {
3777     int ppuX, ppuY;
3778     int startXUnits, startYUnits;
3779
3780     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3781     GetViewStart(& startXUnits, & startYUnits);
3782
3783     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3784 }
3785
3786 /// The adjusted caret position is the character position adjusted to take
3787 /// into account whether we're at the start of a paragraph, in which case
3788 /// style information should be taken from the next position, not current one.
3789 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3790 {
3791     wxRichTextParagraph* para = GetFocusObject()->GetParagraphAtPosition(caretPos+1);
3792
3793     if (para && (caretPos+1 == para->GetRange().GetStart()))
3794         caretPos ++;
3795     return caretPos;
3796 }
3797
3798 /// Get/set the selection range in character positions. -1, -1 means no selection.
3799 /// The range is in API convention, i.e. a single character selection is denoted
3800 /// by (n, n+1)
3801 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3802 {
3803     wxRichTextRange range = GetInternalSelectionRange();
3804     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3805         range.SetEnd(range.GetEnd() + 1);
3806     return range;
3807 }
3808
3809 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3810 {
3811     SetSelection(range.GetStart(), range.GetEnd());
3812 }
3813
3814 /// Set list style
3815 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3816 {
3817     return GetFocusObject()->SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3818 }
3819
3820 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3821 {
3822     return GetFocusObject()->SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3823 }
3824
3825 /// Clear list for given range
3826 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3827 {
3828     return GetFocusObject()->ClearListStyle(range.ToInternal(), flags);
3829 }
3830
3831 /// Number/renumber any list elements in the given range
3832 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3833 {
3834     return GetFocusObject()->NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3835 }
3836
3837 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3838 {
3839     return GetFocusObject()->NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3840 }
3841
3842 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3843 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3844 {
3845     return GetFocusObject()->PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3846 }
3847
3848 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3849 {
3850     return GetFocusObject()->PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3851 }
3852
3853 /// Deletes the content in the given range
3854 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3855 {
3856     return GetFocusObject()->DeleteRangeWithUndo(range.ToInternal(), this, & GetBuffer());
3857 }
3858
3859 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3860 {
3861     if (sm_availableFontNames.GetCount() == 0)
3862     {
3863         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3864         sm_availableFontNames.Sort();
3865     }
3866     return sm_availableFontNames;
3867 }
3868
3869 void wxRichTextCtrl::ClearAvailableFontNames()
3870 {
3871     sm_availableFontNames.Clear();
3872 }
3873
3874 void wxRichTextCtrl::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
3875 {
3876     //wxLogDebug(wxT("wxRichTextCtrl::OnSysColourChanged"));
3877
3878     wxTextAttrEx basicStyle = GetBasicStyle();
3879     basicStyle.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
3880     SetBasicStyle(basicStyle);
3881     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
3882
3883     Refresh();
3884 }
3885
3886 // Refresh the area affected by a selection change
3887 bool wxRichTextCtrl::RefreshForSelectionChange(const wxRichTextSelection& oldSelection, const wxRichTextSelection& newSelection)
3888 {
3889     // If the selection is not part of the focus object, or we have multiple ranges, then the chances are that
3890     // the selection contains whole containers rather than just text, so refresh everything
3891     // for now as it would be hard to compute the rectangle bounding all selections.
3892     // TODO: improve on this.
3893     if ((oldSelection.IsValid() && (oldSelection.GetContainer() != GetFocusObject() || oldSelection.GetCount() > 1)) ||
3894         (newSelection.IsValid() && (newSelection.GetContainer() != GetFocusObject() || newSelection.GetCount() > 1)))
3895     {
3896         Refresh(false);
3897         return true;
3898     }
3899
3900     wxRichTextRange oldRange, newRange;
3901     if (oldSelection.IsValid())
3902         oldRange = oldSelection.GetRange();
3903     else
3904         oldRange = wxRICHTEXT_NO_SELECTION;
3905     if (newSelection.IsValid())
3906         newRange = newSelection.GetRange();
3907     else
3908         newRange = wxRICHTEXT_NO_SELECTION;
3909
3910     // Calculate the refresh rectangle - just the affected lines
3911     long firstPos, lastPos;
3912     if (oldRange.GetStart() == -2 && newRange.GetStart() != -2)
3913     {
3914         firstPos = newRange.GetStart();
3915         lastPos = newRange.GetEnd();
3916     }
3917     else if (oldRange.GetStart() != -2 && newRange.GetStart() == -2)
3918     {
3919         firstPos = oldRange.GetStart();
3920         lastPos = oldRange.GetEnd();
3921     }
3922     else if (oldRange.GetStart() == -2 && newRange.GetStart() == -2)
3923     {
3924         return false;
3925     }
3926     else
3927     {
3928         firstPos = wxMin(oldRange.GetStart(), newRange.GetStart());
3929         lastPos = wxMax(oldRange.GetEnd(), newRange.GetEnd());
3930     }
3931
3932     wxRichTextLine* firstLine = GetFocusObject()->GetLineAtPosition(firstPos);
3933     wxRichTextLine* lastLine = GetFocusObject()->GetLineAtPosition(lastPos);
3934
3935     if (firstLine && lastLine)
3936     {
3937         wxSize clientSize = GetClientSize();
3938         wxPoint pt1 = GetPhysicalPoint(firstLine->GetAbsolutePosition());
3939         wxPoint pt2 = GetPhysicalPoint(lastLine->GetAbsolutePosition()) + wxPoint(0, lastLine->GetSize().y);
3940
3941         pt1.x = 0;
3942         pt1.y = wxMax(0, pt1.y);
3943         pt2.x = 0;
3944         pt2.y = wxMin(clientSize.y, pt2.y);
3945
3946         wxRect rect(pt1, wxSize(clientSize.x, pt2.y - pt1.y));
3947         RefreshRect(rect, false);
3948     }
3949     else
3950         Refresh(false);
3951
3952     return true;
3953 }
3954
3955 // margins functions
3956 bool wxRichTextCtrl::DoSetMargins(const wxPoint& pt)
3957 {
3958     GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetLeft().SetValue(pt.x, wxTEXT_ATTR_UNITS_PIXELS);
3959     GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetRight().SetValue(pt.x, wxTEXT_ATTR_UNITS_PIXELS);
3960     GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetTop().SetValue(pt.y, wxTEXT_ATTR_UNITS_PIXELS);
3961     GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetBottom().SetValue(pt.y, wxTEXT_ATTR_UNITS_PIXELS);
3962
3963     return true;
3964 }
3965
3966 wxPoint wxRichTextCtrl::DoGetMargins() const
3967 {
3968     return wxPoint(GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetLeft().GetValue(),
3969                    GetBuffer().GetAttributes().GetTextBoxAttr().GetMargins().GetTop().GetValue());
3970 }
3971
3972 bool wxRichTextCtrl::SetFocusObject(wxRichTextParagraphLayoutBox* obj, bool setCaretPosition)
3973 {
3974     if (obj && !obj->AcceptsFocus())
3975         return false;
3976
3977     wxRichTextParagraphLayoutBox* oldContainer = GetFocusObject();
3978     bool changingContainer = (m_focusObject != obj);
3979
3980     m_focusObject = obj;
3981
3982     if (!obj)
3983         m_focusObject = & m_buffer;
3984
3985     if (setCaretPosition && changingContainer)
3986     {
3987         m_selection.Reset();
3988         m_selectionAnchor = -2;
3989         m_selectionAnchorObject = NULL;
3990         m_selectionState = wxRichTextCtrlSelectionState_Normal;
3991
3992         long pos = -1;
3993
3994         m_caretAtLineStart = false;
3995         MoveCaret(pos, m_caretAtLineStart);
3996         SetDefaultStyleToCursorStyle();
3997
3998         wxRichTextEvent cmdEvent(
3999             wxEVT_COMMAND_RICHTEXT_FOCUS_OBJECT_CHANGED,
4000             GetId());
4001         cmdEvent.SetEventObject(this);
4002         cmdEvent.SetPosition(m_caretPosition+1);
4003         cmdEvent.SetOldContainer(oldContainer);
4004         cmdEvent.SetContainer(m_focusObject);
4005
4006         GetEventHandler()->ProcessEvent(cmdEvent);
4007     }
4008     return true;
4009 }
4010
4011 #if wxRICHTEXT_USE_OWN_CARET
4012
4013 // ----------------------------------------------------------------------------
4014 // initialization and destruction
4015 // ----------------------------------------------------------------------------
4016
4017 void wxRichTextCaret::Init()
4018 {
4019     m_hasFocus = true;
4020
4021     m_xOld =
4022     m_yOld = -1;
4023     m_richTextCtrl = NULL;
4024     m_needsUpdate = false;
4025     m_flashOn = true;
4026 }
4027
4028 wxRichTextCaret::~wxRichTextCaret()
4029 {
4030     if (m_timer.IsRunning())
4031         m_timer.Stop();
4032 }
4033
4034 // ----------------------------------------------------------------------------
4035 // showing/hiding/moving the caret (base class interface)
4036 // ----------------------------------------------------------------------------
4037
4038 void wxRichTextCaret::DoShow()
4039 {
4040     m_flashOn = true;
4041
4042     if (!m_timer.IsRunning())
4043         m_timer.Start(GetBlinkTime());
4044
4045     Refresh();
4046 }
4047
4048 void wxRichTextCaret::DoHide()
4049 {
4050     if (m_timer.IsRunning())
4051         m_timer.Stop();
4052
4053     Refresh();
4054 }
4055
4056 void wxRichTextCaret::DoMove()
4057 {
4058     if (IsVisible())
4059     {
4060         Refresh();
4061
4062         if (m_xOld != -1 && m_yOld != -1)
4063         {
4064             if (m_richTextCtrl)
4065             {
4066                 wxRect rect(GetPosition(), GetSize());
4067                 m_richTextCtrl->RefreshRect(rect, false);
4068             }
4069         }
4070     }
4071
4072     m_xOld = m_x;
4073     m_yOld = m_y;
4074 }
4075
4076 void wxRichTextCaret::DoSize()
4077 {
4078     int countVisible = m_countVisible;
4079     if (countVisible > 0)
4080     {
4081         m_countVisible = 0;
4082         DoHide();
4083     }
4084
4085     if (countVisible > 0)
4086     {
4087         m_countVisible = countVisible;
4088         DoShow();
4089     }
4090 }
4091
4092 // ----------------------------------------------------------------------------
4093 // handling the focus
4094 // ----------------------------------------------------------------------------
4095
4096 void wxRichTextCaret::OnSetFocus()
4097 {
4098     m_hasFocus = true;
4099
4100     if ( IsVisible() )
4101         Refresh();
4102 }
4103
4104 void wxRichTextCaret::OnKillFocus()
4105 {
4106     m_hasFocus = false;
4107 }
4108
4109 // ----------------------------------------------------------------------------
4110 // drawing the caret
4111 // ----------------------------------------------------------------------------
4112
4113 void wxRichTextCaret::Refresh()
4114 {
4115     if (m_richTextCtrl)
4116     {
4117         wxRect rect(GetPosition(), GetSize());
4118         m_richTextCtrl->RefreshRect(rect, false);
4119     }
4120 }
4121
4122 void wxRichTextCaret::DoDraw(wxDC *dc)
4123 {
4124     dc->SetPen( *wxBLACK_PEN );
4125
4126     dc->SetBrush(*(m_hasFocus ? wxBLACK_BRUSH : wxTRANSPARENT_BRUSH));
4127     dc->SetPen(*wxBLACK_PEN);
4128
4129     wxPoint pt(m_x, m_y);
4130
4131     if (m_richTextCtrl)
4132     {
4133         pt = m_richTextCtrl->GetLogicalPoint(pt);
4134     }
4135     if (IsVisible() && m_flashOn)
4136         dc->DrawRectangle(pt.x, pt.y, m_width, m_height);
4137 }
4138
4139 void wxRichTextCaret::Notify()
4140 {
4141     m_flashOn = !m_flashOn;
4142     Refresh();
4143 }
4144
4145 void wxRichTextCaretTimer::Notify()
4146 {
4147     m_caret->Notify();
4148 }
4149 #endif
4150     // wxRICHTEXT_USE_OWN_CARET
4151
4152 // Add an item
4153 bool wxRichTextContextMenuPropertiesInfo::AddItem(const wxString& label, wxRichTextObject* obj)
4154 {
4155     if (GetCount() < 3)
4156     {
4157         m_labels.Add(label);
4158         m_objects.Add(obj);
4159         return true;
4160     }
4161     else
4162         return false;
4163 }
4164
4165 // Returns number of menu items were added.
4166 int wxRichTextContextMenuPropertiesInfo::AddMenuItems(wxMenu* menu, int startCmd) const
4167 {
4168     wxMenuItem* item = menu->FindItem(startCmd);
4169     // If none of the standard properties identifiers are in the menu, assume it's
4170     // a custom menu without properties commands, and don't add them.
4171     if (item)
4172     {
4173         // If no items, to add just set the text to something generic
4174         if (GetCount() == 0)
4175         {
4176             menu->SetLabel(startCmd, _("&Properties"));
4177
4178             // Delete the others if necessary
4179             int i;
4180             for (i = startCmd+1; i < startCmd+3; i++)
4181             {
4182                 if (menu->FindItem(i))
4183                 {
4184                     menu->Delete(i);
4185                 }
4186             }
4187         }
4188         else
4189         {
4190             int i;
4191             int pos = -1;
4192             // Find the position of the first properties item
4193             for (i = 0; i < (int) menu->GetMenuItemCount(); i++)
4194             {
4195                 wxMenuItem* item = menu->FindItemByPosition(i);
4196                 if (item && item->GetId() == startCmd)
4197                 {
4198                     pos = i;
4199                     break;
4200                 }
4201             }
4202
4203             if (pos != -1)
4204             {
4205                 int insertBefore = pos+1;
4206                 for (i = startCmd; i < startCmd+GetCount(); i++)
4207                 {
4208                     if (menu->FindItem(i))
4209                     {
4210                         menu->SetLabel(i, m_labels[i - startCmd]);
4211                     }
4212                     else
4213                     {
4214                         if (insertBefore >= (int) menu->GetMenuItemCount())
4215                             menu->Append(i, m_labels[i - startCmd]);
4216                         else
4217                             menu->Insert(insertBefore, i, m_labels[i - startCmd]);
4218                     }
4219                     insertBefore ++;
4220                 }
4221
4222                 // Delete any old items still left on the menu
4223                 for (i = startCmd + GetCount(); i < startCmd+3; i++)
4224                 {
4225                     if (menu->FindItem(i))
4226                     {
4227                         menu->Delete(i);
4228                     }
4229                 }
4230             }
4231         }
4232     }
4233
4234     return GetCount();
4235 }
4236
4237 // Add appropriate menu items for the current container and clicked on object
4238 // (and container's parent, if appropriate).
4239 int wxRichTextContextMenuPropertiesInfo::AddItems(wxRichTextObject* container, wxRichTextObject* obj)
4240 {
4241     Clear();
4242     if (obj && obj->CanEditProperties())
4243         AddItem(obj->GetPropertiesMenuLabel(), obj);
4244
4245     if (container && container != obj && container->CanEditProperties() && m_labels.Index(container->GetPropertiesMenuLabel()) == wxNOT_FOUND)
4246         AddItem(container->GetPropertiesMenuLabel(), container);
4247
4248     if (container && container->GetParent() && container->GetParent()->CanEditProperties() && m_labels.Index(container->GetParent()->GetPropertiesMenuLabel()) == wxNOT_FOUND)
4249         AddItem(container->GetParent()->GetPropertiesMenuLabel(), container->GetParent());
4250
4251     return GetCount();
4252 }
4253
4254 #endif
4255     // wxUSE_RICHTEXT