src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richeditctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/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
  61 #if wxRICHTEXT_USE_OWN_CARET
  62
  63 /*!
  64  * wxRichTextCaret
  65  *
  66  * This implements a non-flashing cursor in case there
  67  * are platform-specific problems with the generic caret.
  68  * wxRICHTEXT_USE_OWN_CARET is set in richtextbuffer.h.
  69  */
  70
  71 class wxRichTextCaret;
  72 class wxRichTextCaretTimer: public wxTimer
  73 {
  74   public:
  75     wxRichTextCaretTimer(wxRichTextCaret* caret)
  76     {
  77         m_caret = caret;
  78     }
  79     virtual void Notify();
  80     wxRichTextCaret* m_caret;
  81 };
  82
  83 class wxRichTextCaret: public wxCaret
  84 {
  85 public:
  86     // ctors
  87     // -----
  88         // default - use Create()
  89     wxRichTextCaret(): m_timer(this)  { Init(); }
  90         // creates a block caret associated with the given window
  91     wxRichTextCaret(wxRichTextCtrl *window, int width, int height)
  92         : wxCaret(window, width, height), m_timer(this) { Init(); m_richTextCtrl = window; }
  93     wxRichTextCaret(wxRichTextCtrl *window, const wxSize& size)
  94         : wxCaret(window, size), m_timer(this) { Init(); m_richTextCtrl = window; }
  95
  96     virtual ~wxRichTextCaret();
  97
  98     // implementation
  99     // --------------
 100
 101     // called by wxWindow (not using the event tables)
 102     virtual void OnSetFocus();
 103     virtual void OnKillFocus();
 104
 105     // draw the caret on the given DC
 106     void DoDraw(wxDC *dc);
 107
 108     // get the visible count
 109     int GetVisibleCount() const { return m_countVisible; }
 110
 111     // delay repositioning
 112     bool GetNeedsUpdate() const { return m_needsUpdate; }
 113     void SetNeedsUpdate(bool needsUpdate = true ) { m_needsUpdate = needsUpdate; }
 114
 115     void Notify();
 116
 117 protected:
 118     virtual void DoShow();
 119     virtual void DoHide();
 120     virtual void DoMove();
 121     virtual void DoSize();
 122
 123     // refresh the caret
 124     void Refresh();
 125
 126 private:
 127     void Init();
 128
 129     int           m_xOld,
 130                   m_yOld;
 131     bool          m_hasFocus;       // true => our window has focus
 132     bool          m_needsUpdate;    // must be repositioned
 133     bool          m_flashOn;
 134     wxRichTextCaretTimer m_timer;
 135     wxRichTextCtrl* m_richTextCtrl;
 136 };
 137 #endif
 138
 139 IMPLEMENT_DYNAMIC_CLASS( wxRichTextCtrl, wxTextCtrlBase )
 140
 141 IMPLEMENT_DYNAMIC_CLASS( wxRichTextEvent, wxNotifyEvent )
 142
 143 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxTextCtrlBase )
 144     EVT_PAINT(wxRichTextCtrl::OnPaint)
 145     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
 146     EVT_IDLE(wxRichTextCtrl::OnIdle)
 147     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
 148     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
 149     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
 150     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
 151     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
 152     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
 153     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
 154     EVT_CHAR(wxRichTextCtrl::OnChar)
 155     EVT_KEY_DOWN(wxRichTextCtrl::OnChar)
 156     EVT_SIZE(wxRichTextCtrl::OnSize)
 157     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
 158     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
 159     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
 160     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
 161     EVT_SYS_COLOUR_CHANGED(wxRichTextCtrl::OnSysColourChanged)
 162
 163     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
 164     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
 165
 166     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
 167     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
 168
 169     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
 170     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
 171
 172     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
 173     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
 174
 175     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
 176     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
 177
 178     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
 179     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
 180
 181     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
 182     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 183 END_EVENT_TABLE()
 184
 185 /*!
 186  * wxRichTextCtrl
 187  */
 188
 189 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 190
 191 wxRichTextCtrl::wxRichTextCtrl()
 192               : wxScrollHelper(this)
 193 {
 194     Init();
 195 }
 196
 197 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 198                                wxWindowID id,
 199                                const wxString& value,
 200                                const wxPoint& pos,
 201                                const wxSize& size,
 202                                long style,
 203                                const wxValidator& validator,
 204                                const wxString& name)
 205               : wxScrollHelper(this)
 206 {
 207     Init();
 208     Create(parent, id, value, pos, size, style, validator, name);
 209 }
 210
 211 /// Creation
 212 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 213                              const wxValidator& validator, const wxString& name)
 214 {
 215     style |= wxVSCROLL;
 216
 217     if (!wxTextCtrlBase::Create(parent, id, pos, size,
 218                            style|wxFULL_REPAINT_ON_RESIZE,
 219                            validator, name))
 220         return false;
 221
 222     if (!GetFont().Ok())
 223     {
 224         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 225     }
 226
 227     // No physical scrolling, so we can preserve margins
 228     EnableScrolling(false, false);
 229
 230     if (style & wxTE_READONLY)
 231         SetEditable(false);
 232
 233     // The base attributes must all have default values
 234     wxTextAttr attributes;
 235     attributes.SetFont(GetFont());
 236     attributes.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
 237     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 238     attributes.SetLineSpacing(10);
 239     attributes.SetParagraphSpacingAfter(10);
 240     attributes.SetParagraphSpacingBefore(0);
 241
 242     SetBasicStyle(attributes);
 243
 244     // The default attributes will be merged with base attributes, so
 245     // can be empty to begin with
 246     wxTextAttr defaultAttributes;
 247     SetDefaultStyle(defaultAttributes);
 248
 249     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 250     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 251
 252     GetBuffer().Reset();
 253     GetBuffer().SetRichTextCtrl(this);
 254
 255 #if wxRICHTEXT_USE_OWN_CARET
 256     SetCaret(new wxRichTextCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 257 #else
 258     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 259 #endif
 260
 261     // Tell the sizers to use the given or best size
 262     SetInitialSize(size);
 263
 264 #if wxRICHTEXT_BUFFERED_PAINTING
 265     // Create a buffer
 266     RecreateBuffer(size);
 267 #endif
 268
 269     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 270     m_urlCursor = wxCursor(wxCURSOR_HAND);
 271
 272     SetCursor(m_textCursor);
 273
 274     if (!value.IsEmpty())
 275         SetValue(value);
 276
 277     GetBuffer().AddEventHandler(this);
 278
 279     // Accelerators
 280     wxAcceleratorEntry entries[6];
 281
 282     entries[0].Set(wxACCEL_CMD,   (int) 'C',       wxID_COPY);
 283     entries[1].Set(wxACCEL_CMD,   (int) 'X',       wxID_CUT);
 284     entries[2].Set(wxACCEL_CMD,   (int) 'V',       wxID_PASTE);
 285     entries[3].Set(wxACCEL_CMD,   (int) 'A',       wxID_SELECTALL);
 286     entries[4].Set(wxACCEL_CMD,   (int) 'Z',       wxID_UNDO);
 287     entries[5].Set(wxACCEL_CMD,   (int) 'Y',       wxID_REDO);
 288
 289     wxAcceleratorTable accel(6, entries);
 290     SetAcceleratorTable(accel);
 291
 292     m_contextMenu = new wxMenu;
 293     m_contextMenu->Append(wxID_UNDO, _("&Undo"));
 294     m_contextMenu->Append(wxID_REDO, _("&Redo"));
 295     m_contextMenu->AppendSeparator();
 296     m_contextMenu->Append(wxID_CUT, _("Cu&t"));
 297     m_contextMenu->Append(wxID_COPY, _("&Copy"));
 298     m_contextMenu->Append(wxID_PASTE, _("&Paste"));
 299     m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
 300     m_contextMenu->AppendSeparator();
 301     m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
 302
 303     return true;
 304 }
 305
 306 wxRichTextCtrl::~wxRichTextCtrl()
 307 {
 308     GetBuffer().RemoveEventHandler(this);
 309
 310     delete m_contextMenu;
 311 }
 312
 313 /// Member initialisation
 314 void wxRichTextCtrl::Init()
 315 {
 316     m_contextMenu = NULL;
 317     m_caret = NULL;
 318     m_caretPosition = -1;
 319     m_selectionRange.SetRange(-2, -2);
 320     m_selectionAnchor = -2;
 321     m_editable = true;
 322     m_caretAtLineStart = false;
 323     m_dragging = false;
 324     m_fullLayoutRequired = false;
 325     m_fullLayoutTime = 0;
 326     m_fullLayoutSavedPosition = 0;
 327     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 328     m_caretPositionForDefaultStyle = -2;
 329 }
 330
 331 void wxRichTextCtrl::DoThaw()
 332 {
 333     if (GetBuffer().GetDirty())
 334         LayoutContent();
 335     else
 336         SetupScrollbars();
 337
 338     wxWindow::DoThaw();
 339 }
 340
 341 /// Clear all text
 342 void wxRichTextCtrl::Clear()
 343 {
 344     m_buffer.ResetAndClearCommands();
 345     m_buffer.SetDirty(true);
 346     m_caretPosition = -1;
 347     m_caretPositionForDefaultStyle = -2;
 348     m_caretAtLineStart = false;
 349     m_selectionRange.SetRange(-2, -2);
 350
 351     Scroll(0,0);
 352
 353     if (!IsFrozen())
 354     {
 355         LayoutContent();
 356         Refresh(false);
 357     }
 358
 359     wxTextCtrl::SendTextUpdatedEvent(this);
 360 }
 361
 362 /// Painting
 363 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 364 {
 365 #if !wxRICHTEXT_USE_OWN_CARET
 366     if (GetCaret() && !IsFrozen())
 367         GetCaret()->Hide();
 368 #endif
 369
 370     {
 371 #if wxRICHTEXT_BUFFERED_PAINTING
 372         wxBufferedPaintDC dc(this, m_bufferBitmap);
 373 #else
 374         wxPaintDC dc(this);
 375 #endif
 376
 377         if (IsFrozen())
 378             return;
 379
 380         PrepareDC(dc);
 381
 382         dc.SetFont(GetFont());
 383
 384         // Paint the background
 385         PaintBackground(dc);
 386
 387         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 388
 389         wxRect drawingArea(GetUpdateRegion().GetBox());
 390         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 391
 392         wxRect availableSpace(GetClientSize());
 393         if (GetBuffer().GetDirty())
 394         {
 395             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 396             GetBuffer().SetDirty(false);
 397             SetupScrollbars();
 398         }
 399
 400         wxRect clipRect(availableSpace);
 401         clipRect.x += GetBuffer().GetLeftMargin();
 402         clipRect.y += GetBuffer().GetTopMargin();
 403         clipRect.width -= (GetBuffer().GetLeftMargin() + GetBuffer().GetRightMargin());
 404         clipRect.height -= (GetBuffer().GetTopMargin() + GetBuffer().GetBottomMargin());
 405         clipRect.SetPosition(GetLogicalPoint(clipRect.GetPosition()));
 406         dc.SetClippingRegion(clipRect);
 407
 408         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 409
 410         dc.DestroyClippingRegion();
 411
 412 #if wxRICHTEXT_USE_OWN_CARET
 413         if (GetCaret()->IsVisible())
 414         {
 415             ((wxRichTextCaret*) GetCaret())->DoDraw(& dc);
 416         }
 417 #endif
 418     }
 419
 420 #if !wxRICHTEXT_USE_OWN_CARET
 421     if (GetCaret())
 422         GetCaret()->Show();
 423     PositionCaret();
 424 #endif
 425 }
 426
 427 // Empty implementation, to prevent flicker
 428 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 429 {
 430 }
 431
 432 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 433 {
 434     if (GetCaret())
 435     {
 436 #if !wxRICHTEXT_USE_OWN_CARET
 437         PositionCaret();
 438 #endif
 439         GetCaret()->Show();
 440     }
 441
 442 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 443     // Work around dropouts when control is focused
 444     if (!IsFrozen())
 445     {
 446         Refresh(false);
 447     }
 448 #endif
 449 }
 450
 451 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 452 {
 453     if (GetCaret())
 454         GetCaret()->Hide();
 455
 456 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 457     // Work around dropouts when control is focused
 458     if (!IsFrozen())
 459     {
 460         Refresh(false);
 461     }
 462 #endif
 463 }
 464
 465 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 466 {
 467     m_dragging = false;
 468 }
 469
 470 /// Left-click
 471 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 472 {
 473     SetFocus();
 474
 475     wxClientDC dc(this);
 476     PrepareDC(dc);
 477     dc.SetFont(GetFont());
 478
 479     long position = 0;
 480     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 481
 482     if (hit != wxRICHTEXT_HITTEST_NONE)
 483     {
 484         m_dragStart = event.GetLogicalPosition(dc);
 485         m_dragging = true;
 486         CaptureMouse();
 487
 488         bool caretAtLineStart = false;
 489
 490         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 491         {
 492             // If we're at the start of a line (but not first in para)
 493             // then we should keep the caret showing at the start of the line
 494             // by showing the m_caretAtLineStart flag.
 495             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 496             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 497
 498             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 499                 caretAtLineStart = true;
 500             position --;
 501         }
 502
 503         long oldCaretPos = m_caretPosition;
 504
 505         MoveCaret(position, caretAtLineStart);
 506         SetDefaultStyleToCursorStyle();
 507
 508         if (event.ShiftDown())
 509         {
 510             if (m_selectionRange.GetStart() == -2)
 511                 ExtendSelection(oldCaretPos, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 512             else
 513                 ExtendSelection(m_caretPosition, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 514         }
 515         else
 516             SelectNone();
 517     }
 518
 519     event.Skip();
 520 }
 521
 522 /// Left-up
 523 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 524 {
 525     if (m_dragging)
 526     {
 527         m_dragging = false;
 528         if (GetCapture() == this)
 529             ReleaseMouse();
 530
 531         // See if we clicked on a URL
 532         wxClientDC dc(this);
 533         PrepareDC(dc);
 534         dc.SetFont(GetFont());
 535
 536         long position = 0;
 537         wxPoint logicalPt = event.GetLogicalPosition(dc);
 538         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 539
 540         if ((hit != wxRICHTEXT_HITTEST_NONE) && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 541         {
 542             wxRichTextEvent cmdEvent(
 543                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 544                 GetId());
 545             cmdEvent.SetEventObject(this);
 546             cmdEvent.SetPosition(m_caretPosition+1);
 547
 548             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 549             {
 550                 wxTextAttr attr;
 551                 if (GetStyle(position, attr))
 552                 {
 553                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 554                     {
 555                         wxString urlTarget = attr.GetURL();
 556                         if (!urlTarget.IsEmpty())
 557                         {
 558                             wxMouseEvent mouseEvent(event);
 559
 560                             long startPos = 0, endPos = 0;
 561                             wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 562                             if (obj)
 563                             {
 564                                 startPos = obj->GetRange().GetStart();
 565                                 endPos = obj->GetRange().GetEnd();
 566                             }
 567
 568                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 569                             InitCommandEvent(urlEvent);
 570
 571                             urlEvent.SetString(urlTarget);
 572
 573                             GetEventHandler()->ProcessEvent(urlEvent);
 574                         }
 575                     }
 576                 }
 577             }
 578         }
 579     }
 580 }
 581
 582 /// Left-click
 583 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 584 {
 585     wxClientDC dc(this);
 586     PrepareDC(dc);
 587     dc.SetFont(GetFont());
 588
 589     long position = 0;
 590     wxPoint logicalPt = event.GetLogicalPosition(dc);
 591     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 592
 593     // See if we need to change the cursor
 594
 595     {
 596         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 597         {
 598             wxTextAttr attr;
 599             if (GetStyle(position, attr))
 600             {
 601                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 602                 {
 603                     SetCursor(m_urlCursor);
 604                 }
 605                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 606                 {
 607                     SetCursor(m_textCursor);
 608                 }
 609             }
 610         }
 611         else
 612             SetCursor(m_textCursor);
 613     }
 614
 615     if (!event.Dragging())
 616     {
 617         event.Skip();
 618         return;
 619     }
 620
 621     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 622     {
 623         // TODO: test closeness
 624
 625         bool caretAtLineStart = false;
 626
 627         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 628         {
 629             // If we're at the start of a line (but not first in para)
 630             // then we should keep the caret showing at the start of the line
 631             // by showing the m_caretAtLineStart flag.
 632             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 633             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 634
 635             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 636                 caretAtLineStart = true;
 637             position --;
 638         }
 639
 640         if (m_caretPosition != position)
 641         {
 642             ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 643
 644             MoveCaret(position, caretAtLineStart);
 645             SetDefaultStyleToCursorStyle();
 646         }
 647     }
 648 }
 649
 650 /// Right-click
 651 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 652 {
 653     SetFocus();
 654
 655     wxRichTextEvent cmdEvent(
 656         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 657         GetId());
 658     cmdEvent.SetEventObject(this);
 659     cmdEvent.SetPosition(m_caretPosition+1);
 660
 661     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 662         event.Skip();
 663 }
 664
 665 /// Left-double-click
 666 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 667 {
 668     wxRichTextEvent cmdEvent(
 669         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
 670         GetId());
 671     cmdEvent.SetEventObject(this);
 672     cmdEvent.SetPosition(m_caretPosition+1);
 673
 674     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 675     {
 676         SelectWord(GetCaretPosition()+1);
 677     }
 678 }
 679
 680 /// Middle-click
 681 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 682 {
 683     wxRichTextEvent cmdEvent(
 684         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
 685         GetId());
 686     cmdEvent.SetEventObject(this);
 687     cmdEvent.SetPosition(m_caretPosition+1);
 688
 689     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 690         event.Skip();
 691 }
 692
 693 /// Key press
 694 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 695 {
 696     int flags = 0;
 697     if (event.CmdDown())
 698         flags |= wxRICHTEXT_CTRL_DOWN;
 699     if (event.ShiftDown())
 700         flags |= wxRICHTEXT_SHIFT_DOWN;
 701     if (event.AltDown())
 702         flags |= wxRICHTEXT_ALT_DOWN;
 703
 704     if (event.GetEventType() == wxEVT_KEY_DOWN)
 705     {
 706         if (event.IsKeyInCategory(WXK_CATEGORY_NAVIGATION))
 707         {
 708             KeyboardNavigate(event.GetKeyCode(), flags);
 709             return;
 710         }
 711
 712         long keycode = event.GetKeyCode();
 713         switch ( keycode )
 714         {
 715             case WXK_ESCAPE:
 716             case WXK_START:
 717             case WXK_LBUTTON:
 718             case WXK_RBUTTON:
 719             case WXK_CANCEL:
 720             case WXK_MBUTTON:
 721             case WXK_CLEAR:
 722             case WXK_SHIFT:
 723             case WXK_ALT:
 724             case WXK_CONTROL:
 725             case WXK_MENU:
 726             case WXK_PAUSE:
 727             case WXK_CAPITAL:
 728             case WXK_END:
 729             case WXK_HOME:
 730             case WXK_LEFT:
 731             case WXK_UP:
 732             case WXK_RIGHT:
 733             case WXK_DOWN:
 734             case WXK_SELECT:
 735             case WXK_PRINT:
 736             case WXK_EXECUTE:
 737             case WXK_SNAPSHOT:
 738             case WXK_INSERT:
 739             case WXK_HELP:
 740             case WXK_F1:
 741             case WXK_F2:
 742             case WXK_F3:
 743             case WXK_F4:
 744             case WXK_F5:
 745             case WXK_F6:
 746             case WXK_F7:
 747             case WXK_F8:
 748             case WXK_F9:
 749             case WXK_F10:
 750             case WXK_F11:
 751             case WXK_F12:
 752             case WXK_F13:
 753             case WXK_F14:
 754             case WXK_F15:
 755             case WXK_F16:
 756             case WXK_F17:
 757             case WXK_F18:
 758             case WXK_F19:
 759             case WXK_F20:
 760             case WXK_F21:
 761             case WXK_F22:
 762             case WXK_F23:
 763             case WXK_F24:
 764             case WXK_NUMLOCK:
 765             case WXK_SCROLL:
 766             case WXK_PAGEUP:
 767             case WXK_PAGEDOWN:
 768             case WXK_NUMPAD_F1:
 769             case WXK_NUMPAD_F2:
 770             case WXK_NUMPAD_F3:
 771             case WXK_NUMPAD_F4:
 772             case WXK_NUMPAD_HOME:
 773             case WXK_NUMPAD_LEFT:
 774             case WXK_NUMPAD_UP:
 775             case WXK_NUMPAD_RIGHT:
 776             case WXK_NUMPAD_DOWN:
 777             case WXK_NUMPAD_PAGEUP:
 778             case WXK_NUMPAD_PAGEDOWN:
 779             case WXK_NUMPAD_END:
 780             case WXK_NUMPAD_BEGIN:
 781             case WXK_NUMPAD_INSERT:
 782             case WXK_WINDOWS_LEFT:
 783             {
 784                 return;
 785             }
 786             default:
 787             {
 788             }
 789         }
 790
 791         // Must process this before translation, otherwise it's translated into a WXK_DELETE event.
 792         if (event.CmdDown() && event.GetKeyCode() == WXK_BACK)
 793         {
 794             BeginBatchUndo(_("Delete Text"));
 795
 796             long newPos = m_caretPosition;
 797
 798             bool processed = DeleteSelectedContent(& newPos);
 799
 800             // Submit range in character positions, which are greater than caret positions,
 801             // so subtract 1 for deleted character and add 1 for conversion to character position.
 802             if (newPos > -1)
 803             {
 804                 if (event.CmdDown())
 805                 {
 806                     long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 807                     if (pos < newPos)
 808                     {
 809                         GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this);
 810                         processed = true;
 811                     }
 812                 }
 813
 814                 if (!processed)
 815                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this);
 816             }
 817
 818             EndBatchUndo();
 819
 820             if (GetLastPosition() == -1)
 821             {
 822                 GetBuffer().Reset();
 823
 824                 m_caretPosition = -1;
 825                 PositionCaret();
 826                 SetDefaultStyleToCursorStyle();
 827             }
 828
 829             ScrollIntoView(m_caretPosition, WXK_LEFT);
 830
 831             wxRichTextEvent cmdEvent(
 832                 wxEVT_COMMAND_RICHTEXT_DELETE,
 833                 GetId());
 834             cmdEvent.SetEventObject(this);
 835             cmdEvent.SetFlags(flags);
 836             cmdEvent.SetPosition(m_caretPosition+1);
 837             GetEventHandler()->ProcessEvent(cmdEvent);
 838
 839             Update();
 840         }
 841         else
 842             event.Skip();
 843
 844         return;
 845     }
 846
 847     // all the other keys modify the controls contents which shouldn't be
 848     // possible if we're read-only
 849     if ( !IsEditable() )
 850     {
 851         event.Skip();
 852         return;
 853     }
 854
 855     if (event.GetKeyCode() == WXK_RETURN)
 856     {
 857         BeginBatchUndo(_("Insert Text"));
 858
 859         long newPos = m_caretPosition;
 860
 861         DeleteSelectedContent(& newPos);
 862
 863         if (event.ShiftDown())
 864         {
 865             wxString text;
 866             text = wxRichTextLineBreakChar;
 867             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 868             m_caretAtLineStart = true;
 869             PositionCaret();
 870         }
 871         else
 872             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE|wxRICHTEXT_INSERT_INTERACTIVE);
 873
 874         EndBatchUndo();
 875         SetDefaultStyleToCursorStyle();
 876
 877         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 878
 879         wxRichTextEvent cmdEvent(
 880             wxEVT_COMMAND_RICHTEXT_RETURN,
 881             GetId());
 882         cmdEvent.SetEventObject(this);
 883         cmdEvent.SetFlags(flags);
 884         cmdEvent.SetPosition(newPos+1);
 885
 886         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 887         {
 888             // Generate conventional event
 889             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 890             InitCommandEvent(textEvent);
 891
 892             GetEventHandler()->ProcessEvent(textEvent);
 893         }
 894         Update();
 895     }
 896     else if (event.GetKeyCode() == WXK_BACK)
 897     {
 898         BeginBatchUndo(_("Delete Text"));
 899
 900         long newPos = m_caretPosition;
 901
 902         bool processed = DeleteSelectedContent(& newPos);
 903
 904         // Submit range in character positions, which are greater than caret positions,
 905         // so subtract 1 for deleted character and add 1 for conversion to character position.
 906         if (newPos > -1)
 907         {
 908             if (event.CmdDown())
 909             {
 910                 long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 911                 if (pos < newPos)
 912                 {
 913                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this);
 914                     processed = true;
 915                 }
 916             }
 917
 918             if (!processed)
 919                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this);
 920         }
 921
 922         EndBatchUndo();
 923
 924         if (GetLastPosition() == -1)
 925         {
 926             GetBuffer().Reset();
 927
 928             m_caretPosition = -1;
 929             PositionCaret();
 930             SetDefaultStyleToCursorStyle();
 931         }
 932
 933         ScrollIntoView(m_caretPosition, WXK_LEFT);
 934
 935         wxRichTextEvent cmdEvent(
 936             wxEVT_COMMAND_RICHTEXT_DELETE,
 937             GetId());
 938         cmdEvent.SetEventObject(this);
 939         cmdEvent.SetFlags(flags);
 940         cmdEvent.SetPosition(m_caretPosition+1);
 941         GetEventHandler()->ProcessEvent(cmdEvent);
 942
 943         Update();
 944     }
 945     else if (event.GetKeyCode() == WXK_DELETE)
 946     {
 947         BeginBatchUndo(_("Delete Text"));
 948
 949         long newPos = m_caretPosition;
 950
 951         bool processed = DeleteSelectedContent(& newPos);
 952
 953         // Submit range in character positions, which are greater than caret positions,
 954         if (newPos < GetBuffer().GetRange().GetEnd()+1)
 955         {
 956             if (event.CmdDown())
 957             {
 958                 long pos = wxRichTextCtrl::FindNextWordPosition(1);
 959                 if (pos != -1 && (pos > newPos))
 960                 {
 961                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos+1, pos), this);
 962                     processed = true;
 963                 }
 964             }
 965
 966             if (!processed && newPos < (GetLastPosition()-1))
 967                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos+1, newPos+1), this);
 968         }
 969
 970         EndBatchUndo();
 971
 972         if (GetLastPosition() == -1)
 973         {
 974             GetBuffer().Reset();
 975
 976             m_caretPosition = -1;
 977             PositionCaret();
 978             SetDefaultStyleToCursorStyle();
 979         }
 980
 981         wxRichTextEvent cmdEvent(
 982             wxEVT_COMMAND_RICHTEXT_DELETE,
 983             GetId());
 984         cmdEvent.SetEventObject(this);
 985         cmdEvent.SetFlags(flags);
 986         cmdEvent.SetPosition(m_caretPosition+1);
 987         GetEventHandler()->ProcessEvent(cmdEvent);
 988
 989         Update();
 990     }
 991     else
 992     {
 993         long keycode = event.GetKeyCode();
 994         switch ( keycode )
 995         {
 996             case WXK_ESCAPE:
 997             {
 998                 event.Skip();
 999                 return;
1000             }
1001
1002             default:
1003             {
1004 #ifdef __WXMAC__
1005                 if (event.CmdDown())
1006 #else
1007                 // Fixes AltGr+key with European input languages on Windows
1008                 if ((event.CmdDown() && !event.AltDown()) || (event.AltDown() && !event.CmdDown()))
1009 #endif
1010                 {
1011                     event.Skip();
1012                     return;
1013                 }
1014
1015                 wxRichTextEvent cmdEvent(
1016                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
1017                     GetId());
1018                 cmdEvent.SetEventObject(this);
1019                 cmdEvent.SetFlags(flags);
1020 #if wxUSE_UNICODE
1021                 cmdEvent.SetCharacter(event.GetUnicodeKey());
1022 #else
1023                 cmdEvent.SetCharacter((wxChar) keycode);
1024 #endif
1025                 cmdEvent.SetPosition(m_caretPosition+1);
1026
1027                 if (keycode == wxT('\t'))
1028                 {
1029                     // See if we need to promote or demote the selection or paragraph at the cursor
1030                     // position, instead of inserting a tab.
1031                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
1032                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
1033                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
1034                     {
1035                         wxRichTextRange range;
1036                         if (HasSelection())
1037                             range = GetSelectionRange();
1038                         else
1039                             range = para->GetRange().FromInternal();
1040
1041                         int promoteBy = event.ShiftDown() ? 1 : -1;
1042
1043                         PromoteList(promoteBy, range, NULL);
1044
1045                         GetEventHandler()->ProcessEvent(cmdEvent);
1046
1047                         return;
1048                     }
1049                 }
1050
1051                 BeginBatchUndo(_("Insert Text"));
1052
1053                 long newPos = m_caretPosition;
1054                 DeleteSelectedContent(& newPos);
1055
1056 #if wxUSE_UNICODE
1057                 wxString str = event.GetUnicodeKey();
1058 #else
1059                 wxString str = (wxChar) event.GetKeyCode();
1060 #endif
1061                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
1062
1063                 EndBatchUndo();
1064
1065                 SetDefaultStyleToCursorStyle();
1066                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
1067
1068                 GetEventHandler()->ProcessEvent(cmdEvent);
1069
1070                 Update();
1071             }
1072         }
1073     }
1074 }
1075
1076 /// Delete content if there is a selection, e.g. when pressing a key.
1077 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
1078 {
1079     if (HasSelection())
1080     {
1081         long pos = m_selectionRange.GetStart();
1082         wxRichTextRange range = m_selectionRange;
1083
1084         // SelectAll causes more to be selected than doing it interactively,
1085         // and causes a new paragraph to be inserted. So for multiline buffers,
1086         // don't delete the final position.
1087         if (range.GetEnd() == GetLastPosition() && GetNumberOfLines() > 0)
1088             range.SetEnd(range.GetEnd()-1);
1089
1090         GetBuffer().DeleteRangeWithUndo(range, this);
1091         m_selectionRange.SetRange(-2, -2);
1092
1093         if (newPos)
1094             *newPos = pos-1;
1095         return true;
1096     }
1097     else
1098         return false;
1099 }
1100
1101 /// Keyboard navigation
1102
1103 /*
1104
1105 Left:       left one character
1106 Right:      right one character
1107 Up:         up one line
1108 Down:       down one line
1109 Ctrl-Left:  left one word
1110 Ctrl-Right: right one word
1111 Ctrl-Up:    previous paragraph start
1112 Ctrl-Down:  next start of paragraph
1113 Home:       start of line
1114 End:        end of line
1115 Ctrl-Home:  start of document
1116 Ctrl-End:   end of document
1117 Page-Up:    Up a screen
1118 Page-Down:  Down a screen
1119
1120 Maybe:
1121
1122 Ctrl-Alt-PgUp: Start of window
1123 Ctrl-Alt-PgDn: End of window
1124 F8:         Start selection mode
1125 Esc:        End selection mode
1126
1127 Adding Shift does the above but starts/extends selection.
1128
1129
1130  */
1131
1132 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
1133 {
1134     bool success = false;
1135
1136     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
1137     {
1138         if (flags & wxRICHTEXT_CTRL_DOWN)
1139             success = WordRight(1, flags);
1140         else
1141             success = MoveRight(1, flags);
1142     }
1143     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
1144     {
1145         if (flags & wxRICHTEXT_CTRL_DOWN)
1146             success = WordLeft(1, flags);
1147         else
1148             success = MoveLeft(1, flags);
1149     }
1150     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
1151     {
1152         if (flags & wxRICHTEXT_CTRL_DOWN)
1153             success = MoveToParagraphStart(flags);
1154         else
1155             success = MoveUp(1, flags);
1156     }
1157     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
1158     {
1159         if (flags & wxRICHTEXT_CTRL_DOWN)
1160             success = MoveToParagraphEnd(flags);
1161         else
1162             success = MoveDown(1, flags);
1163     }
1164     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
1165     {
1166         success = PageUp(1, flags);
1167     }
1168     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1169     {
1170         success = PageDown(1, flags);
1171     }
1172     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
1173     {
1174         if (flags & wxRICHTEXT_CTRL_DOWN)
1175             success = MoveHome(flags);
1176         else
1177             success = MoveToLineStart(flags);
1178     }
1179     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
1180     {
1181         if (flags & wxRICHTEXT_CTRL_DOWN)
1182             success = MoveEnd(flags);
1183         else
1184             success = MoveToLineEnd(flags);
1185     }
1186
1187     if (success)
1188     {
1189         ScrollIntoView(m_caretPosition, keyCode);
1190         SetDefaultStyleToCursorStyle();
1191     }
1192
1193     return success;
1194 }
1195
1196 /// Extend the selection. Selections are in caret positions.
1197 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
1198 {
1199     if (flags & wxRICHTEXT_SHIFT_DOWN)
1200     {
1201         if (oldPos == newPos)
1202             return false;
1203
1204         wxRichTextRange oldSelection = m_selectionRange;
1205
1206         // If not currently selecting, start selecting
1207         if (m_selectionRange.GetStart() == -2)
1208         {
1209             m_selectionAnchor = oldPos;
1210
1211             if (oldPos > newPos)
1212                 m_selectionRange.SetRange(newPos+1, oldPos);
1213             else
1214                 m_selectionRange.SetRange(oldPos+1, newPos);
1215         }
1216         else
1217         {
1218             // Always ensure that the selection range start is greater than
1219             // the end.
1220             if (newPos > m_selectionAnchor)
1221                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
1222             else if (newPos == m_selectionAnchor)
1223                 m_selectionRange = wxRichTextRange(-2, -2);
1224             else
1225                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
1226         }
1227
1228         RefreshForSelectionChange(oldSelection, m_selectionRange);
1229
1230         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
1231         {
1232             wxLogDebug(wxT("Strange selection range"));
1233         }
1234
1235         return true;
1236     }
1237     else
1238         return false;
1239 }
1240
1241 /// Scroll into view, returning true if we scrolled.
1242 /// This takes a _caret_ position.
1243 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1244 {
1245     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1246
1247     if (!line)
1248         return false;
1249
1250     int ppuX, ppuY;
1251     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1252
1253     int startXUnits, startYUnits;
1254     GetViewStart(& startXUnits, & startYUnits);
1255     int startY = startYUnits * ppuY;
1256
1257     int sx = 0, sy = 0;
1258     GetVirtualSize(& sx, & sy);
1259     int sxUnits = 0;
1260     int syUnits = 0;
1261     if (ppuY != 0)
1262         syUnits = sy/ppuY;
1263
1264     wxRect rect = line->GetRect();
1265
1266     bool scrolled = false;
1267
1268     wxSize clientSize = GetClientSize();
1269     clientSize.y -= GetBuffer().GetBottomMargin();
1270
1271     if (GetWindowStyle() & wxRE_CENTRE_CARET)
1272     {
1273         int y = rect.y - GetClientSize().y/2;
1274         int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1275         if (y >= 0 && (y + clientSize.y) < GetBuffer().GetCachedSize().y)
1276         {
1277             if (startYUnits != yUnits)
1278             {
1279                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1280                 scrolled = true;
1281             }
1282 #if !wxRICHTEXT_USE_OWN_CARET
1283             if (scrolled)
1284 #endif
1285                 PositionCaret();
1286
1287             return scrolled;
1288         }
1289     }
1290
1291     // Going down
1292     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1293         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1294         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1295         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1296     {
1297         if ((rect.y + rect.height) > (clientSize.y + startY))
1298         {
1299             // Make it scroll so this item is at the bottom
1300             // of the window
1301             int y = rect.y - (clientSize.y - rect.height);
1302             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1303
1304             // If we're still off the screen, scroll another line down
1305             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1306                 yUnits ++;
1307
1308             if (startYUnits != yUnits)
1309             {
1310                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1311                 scrolled = true;
1312             }
1313         }
1314         else if (rect.y < (startY + GetBuffer().GetTopMargin()))
1315         {
1316             // Make it scroll so this item is at the top
1317             // of the window
1318             int y = rect.y - GetBuffer().GetTopMargin();
1319             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1320
1321             if (startYUnits != yUnits)
1322             {
1323                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1324                 scrolled = true;
1325             }
1326         }
1327     }
1328     // Going up
1329     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1330              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1331              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1332              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1333     {
1334         if (rect.y < (startY + GetBuffer().GetBottomMargin()))
1335         {
1336             // Make it scroll so this item is at the top
1337             // of the window
1338             int y = rect.y - GetBuffer().GetTopMargin();
1339             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1340
1341             if (startYUnits != yUnits)
1342             {
1343                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1344                 scrolled = true;
1345             }
1346         }
1347         else if ((rect.y + rect.height) > (clientSize.y + startY))
1348         {
1349             // Make it scroll so this item is at the bottom
1350             // of the window
1351             int y = rect.y - (clientSize.y - rect.height);
1352             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1353
1354             // If we're still off the screen, scroll another line down
1355             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1356                 yUnits ++;
1357
1358             if (startYUnits != yUnits)
1359             {
1360                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1361                 scrolled = true;
1362             }
1363         }
1364     }
1365
1366 #if !wxRICHTEXT_USE_OWN_CARET
1367     if (scrolled)
1368 #endif
1369         PositionCaret();
1370
1371     return scrolled;
1372 }
1373
1374 /// Is the given position visible on the screen?
1375 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1376 {
1377     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1378
1379     if (!line)
1380         return false;
1381
1382     int ppuX, ppuY;
1383     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1384
1385     int startX, startY;
1386     GetViewStart(& startX, & startY);
1387     startX = 0;
1388     startY = startY * ppuY;
1389
1390     wxRect rect = line->GetRect();
1391     wxSize clientSize = GetClientSize();
1392     clientSize.y -= GetBuffer().GetBottomMargin();
1393
1394     return (rect.GetBottom() > (startY + GetBuffer().GetTopMargin())) && (rect.GetTop() < (startY + clientSize.y));
1395 }
1396
1397 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1398 {
1399     m_caretPosition = position;
1400     m_caretAtLineStart = showAtLineStart;
1401 }
1402
1403 /// Move caret one visual step forward: this may mean setting a flag
1404 /// and keeping the same position if we're going from the end of one line
1405 /// to the start of the next, which may be the exact same caret position.
1406 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1407 {
1408     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1409
1410     // Only do the check if we're not at the end of the paragraph (where things work OK
1411     // anyway)
1412     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1413     {
1414         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1415
1416         if (line)
1417         {
1418             wxRichTextRange lineRange = line->GetAbsoluteRange();
1419
1420             // We're at the end of a line. See whether we need to
1421             // stay at the same actual caret position but change visual
1422             // position, or not.
1423             if (oldPosition == lineRange.GetEnd())
1424             {
1425                 if (m_caretAtLineStart)
1426                 {
1427                     // We're already at the start of the line, so actually move on now.
1428                     m_caretPosition = oldPosition + 1;
1429                     m_caretAtLineStart = false;
1430                 }
1431                 else
1432                 {
1433                     // We're showing at the end of the line, so keep to
1434                     // the same position but indicate that we're to show
1435                     // at the start of the next line.
1436                     m_caretPosition = oldPosition;
1437                     m_caretAtLineStart = true;
1438                 }
1439                 SetDefaultStyleToCursorStyle();
1440                 return;
1441             }
1442         }
1443     }
1444     m_caretPosition ++;
1445     SetDefaultStyleToCursorStyle();
1446 }
1447
1448 /// Move caret one visual step backward: this may mean setting a flag
1449 /// and keeping the same position if we're going from the end of one line
1450 /// to the start of the next, which may be the exact same caret position.
1451 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1452 {
1453     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1454
1455     // Only do the check if we're not at the start of the paragraph (where things work OK
1456     // anyway)
1457     if (para && (oldPosition != para->GetRange().GetStart()))
1458     {
1459         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1460
1461         if (line)
1462         {
1463             wxRichTextRange lineRange = line->GetAbsoluteRange();
1464
1465             // We're at the start of a line. See whether we need to
1466             // stay at the same actual caret position but change visual
1467             // position, or not.
1468             if (oldPosition == lineRange.GetStart())
1469             {
1470                 m_caretPosition = oldPosition-1;
1471                 m_caretAtLineStart = true;
1472                 return;
1473             }
1474             else if (oldPosition == lineRange.GetEnd())
1475             {
1476                 if (m_caretAtLineStart)
1477                 {
1478                     // We're at the start of the line, so keep the same caret position
1479                     // but clear the start-of-line flag.
1480                     m_caretPosition = oldPosition;
1481                     m_caretAtLineStart = false;
1482                 }
1483                 else
1484                 {
1485                     // We're showing at the end of the line, so go back
1486                     // to the previous character position.
1487                     m_caretPosition = oldPosition - 1;
1488                 }
1489                 SetDefaultStyleToCursorStyle();
1490                 return;
1491             }
1492         }
1493     }
1494     m_caretPosition --;
1495     SetDefaultStyleToCursorStyle();
1496 }
1497
1498 /// Move right
1499 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1500 {
1501     long endPos = GetBuffer().GetRange().GetEnd();
1502
1503     if (m_caretPosition + noPositions < endPos)
1504     {
1505         long oldPos = m_caretPosition;
1506         long newPos = m_caretPosition + noPositions;
1507
1508         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1509         if (!extendSel)
1510             SelectNone();
1511
1512         // Determine by looking at oldPos and m_caretPosition whether
1513         // we moved from the end of a line to the start of the next line, in which case
1514         // we want to adjust the caret position such that it is positioned at the
1515         // start of the next line, rather than jumping past the first character of the
1516         // line.
1517         if (noPositions == 1 && !extendSel)
1518             MoveCaretForward(oldPos);
1519         else
1520             SetCaretPosition(newPos);
1521
1522         PositionCaret();
1523         SetDefaultStyleToCursorStyle();
1524
1525         return true;
1526     }
1527     else
1528         return false;
1529 }
1530
1531 /// Move left
1532 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1533 {
1534     long startPos = -1;
1535
1536     if (m_caretPosition > startPos - noPositions + 1)
1537     {
1538         long oldPos = m_caretPosition;
1539         long newPos = m_caretPosition - noPositions;
1540         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1541         if (!extendSel)
1542             SelectNone();
1543
1544         if (noPositions == 1 && !extendSel)
1545             MoveCaretBack(oldPos);
1546         else
1547             SetCaretPosition(newPos);
1548
1549         PositionCaret();
1550         SetDefaultStyleToCursorStyle();
1551
1552         return true;
1553     }
1554     else
1555         return false;
1556 }
1557
1558 /// Move up
1559 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1560 {
1561     return MoveDown(- noLines, flags);
1562 }
1563
1564 /// Move up
1565 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1566 {
1567     if (!GetCaret())
1568         return false;
1569
1570     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1571     wxPoint pt = GetCaret()->GetPosition();
1572     long newLine = lineNumber + noLines;
1573
1574     if (lineNumber != -1)
1575     {
1576         if (noLines > 0)
1577         {
1578             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1579
1580             if (newLine > lastLine)
1581                 return false;
1582         }
1583         else
1584         {
1585             if (newLine < 0)
1586                 return false;
1587         }
1588     }
1589
1590     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1591     if (lineObj)
1592     {
1593         pt.y = lineObj->GetAbsolutePosition().y + 2;
1594     }
1595     else
1596         return false;
1597
1598     long newPos = 0;
1599     wxClientDC dc(this);
1600     PrepareDC(dc);
1601     dc.SetFont(GetFont());
1602
1603     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1604
1605     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1606     {
1607         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1608         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1609         // so we view the caret at the start of the line.
1610         bool caretLineStart = false;
1611         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1612         {
1613             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1614             wxRichTextRange lineRange;
1615             if (thisLine)
1616                 lineRange = thisLine->GetAbsoluteRange();
1617
1618             if (thisLine && (newPos-1) == lineRange.GetEnd())
1619             {
1620                 newPos --;
1621                 caretLineStart = true;
1622             }
1623             else
1624             {
1625                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1626                 if (para && para->GetRange().GetStart() == newPos)
1627                     newPos --;
1628             }
1629         }
1630
1631         long newSelEnd = newPos;
1632
1633         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1634         if (!extendSel)
1635             SelectNone();
1636
1637         SetCaretPosition(newPos, caretLineStart);
1638         PositionCaret();
1639         SetDefaultStyleToCursorStyle();
1640
1641         return true;
1642     }
1643
1644     return false;
1645 }
1646
1647 /// Move to the end of the paragraph
1648 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1649 {
1650     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1651     if (para)
1652     {
1653         long newPos = para->GetRange().GetEnd() - 1;
1654         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1655         if (!extendSel)
1656             SelectNone();
1657
1658         SetCaretPosition(newPos);
1659         PositionCaret();
1660         SetDefaultStyleToCursorStyle();
1661
1662         return true;
1663     }
1664
1665     return false;
1666 }
1667
1668 /// Move to the start of the paragraph
1669 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1670 {
1671     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1672     if (para)
1673     {
1674         long newPos = para->GetRange().GetStart() - 1;
1675         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1676         if (!extendSel)
1677             SelectNone();
1678
1679         SetCaretPosition(newPos);
1680         PositionCaret();
1681         SetDefaultStyleToCursorStyle();
1682
1683         return true;
1684     }
1685
1686     return false;
1687 }
1688
1689 /// Move to the end of the line
1690 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1691 {
1692     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1693
1694     if (line)
1695     {
1696         wxRichTextRange lineRange = line->GetAbsoluteRange();
1697         long newPos = lineRange.GetEnd();
1698         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1699         if (!extendSel)
1700             SelectNone();
1701
1702         SetCaretPosition(newPos);
1703         PositionCaret();
1704         SetDefaultStyleToCursorStyle();
1705
1706         return true;
1707     }
1708
1709     return false;
1710 }
1711
1712 /// Move to the start of the line
1713 bool wxRichTextCtrl::MoveToLineStart(int flags)
1714 {
1715     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1716     if (line)
1717     {
1718         wxRichTextRange lineRange = line->GetAbsoluteRange();
1719         long newPos = lineRange.GetStart()-1;
1720
1721         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1722         if (!extendSel)
1723             SelectNone();
1724
1725         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1726
1727         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1728         PositionCaret();
1729         SetDefaultStyleToCursorStyle();
1730
1731         return true;
1732     }
1733
1734     return false;
1735 }
1736
1737 /// Move to the start of the buffer
1738 bool wxRichTextCtrl::MoveHome(int flags)
1739 {
1740     if (m_caretPosition != -1)
1741     {
1742         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1743         if (!extendSel)
1744             SelectNone();
1745
1746         SetCaretPosition(-1);
1747         PositionCaret();
1748         SetDefaultStyleToCursorStyle();
1749
1750         return true;
1751     }
1752     else
1753         return false;
1754 }
1755
1756 /// Move to the end of the buffer
1757 bool wxRichTextCtrl::MoveEnd(int flags)
1758 {
1759     long endPos = GetBuffer().GetRange().GetEnd()-1;
1760
1761     if (m_caretPosition != endPos)
1762     {
1763         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1764         if (!extendSel)
1765             SelectNone();
1766
1767         SetCaretPosition(endPos);
1768         PositionCaret();
1769         SetDefaultStyleToCursorStyle();
1770
1771         return true;
1772     }
1773     else
1774         return false;
1775 }
1776
1777 /// Move noPages pages up
1778 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1779 {
1780     return PageDown(- noPages, flags);
1781 }
1782
1783 /// Move noPages pages down
1784 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1785 {
1786     // Calculate which line occurs noPages * screen height further down.
1787     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1788     if (line)
1789     {
1790         wxSize clientSize = GetClientSize();
1791         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1792
1793         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1794         if (newLine)
1795         {
1796             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1797             long pos = lineRange.GetStart()-1;
1798             if (pos != m_caretPosition)
1799             {
1800                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1801
1802                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1803                 if (!extendSel)
1804                     SelectNone();
1805
1806                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1807                 PositionCaret();
1808                 SetDefaultStyleToCursorStyle();
1809
1810                 return true;
1811             }
1812         }
1813     }
1814
1815     return false;
1816 }
1817
1818 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1819 {
1820     return str == wxT(" ") || str == wxT("\t");
1821 }
1822
1823 // Finds the caret position for the next word
1824 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1825 {
1826     long endPos = GetBuffer().GetRange().GetEnd();
1827
1828     if (direction > 0)
1829     {
1830         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1831
1832         // First skip current text to space
1833         while (i < endPos && i > -1)
1834         {
1835             // i is in character, not caret positions
1836             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1837             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1838             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1839             {
1840                 break;
1841             }
1842             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1843                 i += direction;
1844             else
1845             {
1846                 break;
1847             }
1848         }
1849         while (i < endPos && i > -1)
1850         {
1851             // i is in character, not caret positions
1852             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1853             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1854             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1855                 return wxMax(-1, i);
1856
1857             if (text.empty()) // End of paragraph, or maybe an image
1858                 return wxMax(-1, i - 1);
1859             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1860                 i += direction;
1861             else
1862             {
1863                 // Convert to caret position
1864                 return wxMax(-1, i - 1);
1865             }
1866         }
1867         if (i >= endPos)
1868             return endPos-1;
1869         return i-1;
1870     }
1871     else
1872     {
1873         long i = m_caretPosition;
1874
1875         // First skip white space
1876         while (i < endPos && i > -1)
1877         {
1878             // i is in character, not caret positions
1879             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1880             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1881
1882             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1883                 break;
1884             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1885                 i += direction;
1886             else
1887                 break;
1888         }
1889         // Next skip current text to space
1890         while (i < endPos && i > -1)
1891         {
1892             // i is in character, not caret positions
1893             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1894             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1895             if (line && line->GetAbsoluteRange().GetStart() == i)
1896                 return i-1;
1897
1898             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1899                 i += direction;
1900             else
1901             {
1902                 return i;
1903             }
1904         }
1905         if (i < -1)
1906             return -1;
1907         return i;
1908     }
1909 }
1910
1911 /// Move n words left
1912 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1913 {
1914     long pos = FindNextWordPosition(-1);
1915     if (pos != m_caretPosition)
1916     {
1917         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1918
1919         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1920         if (!extendSel)
1921             SelectNone();
1922
1923         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1924         PositionCaret();
1925         SetDefaultStyleToCursorStyle();
1926
1927         return true;
1928     }
1929
1930     return false;
1931 }
1932
1933 /// Move n words right
1934 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1935 {
1936     long pos = FindNextWordPosition(1);
1937     if (pos != m_caretPosition)
1938     {
1939         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1940
1941         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1942         if (!extendSel)
1943             SelectNone();
1944
1945         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1946         PositionCaret();
1947         SetDefaultStyleToCursorStyle();
1948
1949         return true;
1950     }
1951
1952     return false;
1953 }
1954
1955 /// Sizing
1956 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1957 {
1958     // Only do sizing optimization for large buffers
1959     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1960     {
1961         m_fullLayoutRequired = true;
1962         m_fullLayoutTime = wxGetLocalTimeMillis();
1963         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1964         LayoutContent(true /* onlyVisibleRect */);
1965     }
1966     else
1967         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1968
1969 #if wxRICHTEXT_BUFFERED_PAINTING
1970     RecreateBuffer();
1971 #endif
1972
1973     event.Skip();
1974 }
1975
1976
1977 /// Idle-time processing
1978 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1979 {
1980 #if wxRICHTEXT_USE_OWN_CARET
1981     if (((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
1982     {
1983         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate(false);
1984         PositionCaret();
1985         GetCaret()->Show();
1986     }
1987 #endif
1988
1989     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1990
1991     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1992     {
1993         m_fullLayoutRequired = false;
1994         m_fullLayoutTime = 0;
1995         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1996         ShowPosition(m_fullLayoutSavedPosition);
1997         Refresh(false);
1998     }
1999
2000     if (m_caretPositionForDefaultStyle != -2)
2001     {
2002         // If the caret position has changed, no longer reflect the default style
2003         // in the UI.
2004         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
2005             m_caretPositionForDefaultStyle = -2;
2006     }
2007
2008     event.Skip();
2009 }
2010
2011 /// Scrolling
2012 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
2013 {
2014 #if wxRICHTEXT_USE_OWN_CARET
2015     if (!((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
2016     {
2017         GetCaret()->Hide();
2018         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate();
2019     }
2020 #endif
2021
2022     event.Skip();
2023 }
2024
2025 /// Set up scrollbars, e.g. after a resize
2026 void wxRichTextCtrl::SetupScrollbars(bool atTop)
2027 {
2028     if (IsFrozen())
2029         return;
2030
2031     if (GetBuffer().IsEmpty())
2032     {
2033         SetScrollbars(0, 0, 0, 0, 0, 0);
2034         return;
2035     }
2036
2037     // TODO: reimplement scrolling so we scroll by line, not by fixed number
2038     // of pixels. See e.g. wxVScrolledWindow for ideas.
2039     int pixelsPerUnit = 5;
2040     wxSize clientSize = GetClientSize();
2041
2042     int maxHeight = GetBuffer().GetCachedSize().y + GetBuffer().GetTopMargin();
2043
2044     // Round up so we have at least maxHeight pixels
2045     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
2046
2047     int startX = 0, startY = 0;
2048     if (!atTop)
2049         GetViewStart(& startX, & startY);
2050
2051     int maxPositionX = 0;
2052     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
2053
2054     int newStartX = wxMin(maxPositionX, startX);
2055     int newStartY = wxMin(maxPositionY, startY);
2056
2057     int oldPPUX, oldPPUY;
2058     int oldStartX, oldStartY;
2059     int oldVirtualSizeX = 0, oldVirtualSizeY = 0;
2060     GetScrollPixelsPerUnit(& oldPPUX, & oldPPUY);
2061     GetViewStart(& oldStartX, & oldStartY);
2062     GetVirtualSize(& oldVirtualSizeX, & oldVirtualSizeY);
2063     if (oldPPUY > 0)
2064         oldVirtualSizeY /= oldPPUY;
2065
2066     if (oldPPUX == 0 && oldPPUY == pixelsPerUnit && oldVirtualSizeY == unitsY && oldStartX == newStartX && oldStartY == newStartY)
2067         return;
2068
2069     // Don't set scrollbars if there were none before, and there will be none now.
2070     if (oldPPUY != 0 && (oldVirtualSizeY*oldPPUY < clientSize.y) && (unitsY*pixelsPerUnit < clientSize.y))
2071         return;
2072
2073     // Move to previous scroll position if
2074     // possible
2075     SetScrollbars(0, pixelsPerUnit, 0, unitsY, newStartX, newStartY);
2076 }
2077
2078 /// Paint the background
2079 void wxRichTextCtrl::PaintBackground(wxDC& dc)
2080 {
2081     wxColour backgroundColour = GetBackgroundColour();
2082     if (!backgroundColour.Ok())
2083         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
2084
2085     // Clear the background
2086     dc.SetBrush(wxBrush(backgroundColour));
2087     dc.SetPen(*wxTRANSPARENT_PEN);
2088     wxRect windowRect(GetClientSize());
2089     windowRect.x -= 2; windowRect.y -= 2;
2090     windowRect.width += 4; windowRect.height += 4;
2091
2092     // We need to shift the rectangle to take into account
2093     // scrolling. Converting device to logical coordinates.
2094     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
2095     dc.DrawRectangle(windowRect);
2096 }
2097
2098 #if wxRICHTEXT_BUFFERED_PAINTING
2099 /// Recreate buffer bitmap if necessary
2100 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
2101 {
2102     wxSize sz = size;
2103     if (sz == wxDefaultSize)
2104         sz = GetClientSize();
2105
2106     if (sz.x < 1 || sz.y < 1)
2107         return false;
2108
2109     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
2110         m_bufferBitmap = wxBitmap(sz.x, sz.y);
2111     return m_bufferBitmap.Ok();
2112 }
2113 #endif
2114
2115 // ----------------------------------------------------------------------------
2116 // file IO functions
2117 // ----------------------------------------------------------------------------
2118
2119 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
2120 {
2121     bool success = GetBuffer().LoadFile(filename, (wxRichTextFileType)fileType);
2122     if (success)
2123         m_filename = filename;
2124
2125     DiscardEdits();
2126     SetInsertionPoint(0);
2127     LayoutContent();
2128     PositionCaret();
2129     SetupScrollbars(true);
2130     Refresh(false);
2131     wxTextCtrl::SendTextUpdatedEvent(this);
2132
2133     if (success)
2134         return true;
2135     else
2136     {
2137         wxLogError(_("File couldn't be loaded."));
2138
2139         return false;
2140     }
2141 }
2142
2143 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
2144 {
2145     if (GetBuffer().SaveFile(filename, (wxRichTextFileType)fileType))
2146     {
2147         m_filename = filename;
2148
2149         DiscardEdits();
2150
2151         return true;
2152     }
2153
2154     wxLogError(_("The text couldn't be saved."));
2155
2156     return false;
2157 }
2158
2159 // ----------------------------------------------------------------------------
2160 // wxRichTextCtrl specific functionality
2161 // ----------------------------------------------------------------------------
2162
2163 /// Add a new paragraph of text to the end of the buffer
2164 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
2165 {
2166     wxRichTextRange range = GetBuffer().AddParagraph(text);
2167     LayoutContent();
2168     return range;
2169 }
2170
2171 /// Add an image
2172 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
2173 {
2174     wxRichTextRange range = GetBuffer().AddImage(image);
2175     LayoutContent();
2176     return range;
2177 }
2178
2179 // ----------------------------------------------------------------------------
2180 // selection and ranges
2181 // ----------------------------------------------------------------------------
2182
2183 void wxRichTextCtrl::SelectAll()
2184 {
2185     SetSelection(-1, -1);
2186 }
2187
2188 /// Select none
2189 void wxRichTextCtrl::SelectNone()
2190 {
2191     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
2192     {
2193         wxRichTextRange oldSelection = m_selectionRange;
2194
2195         m_selectionRange = wxRichTextRange(-2, -2);
2196
2197         RefreshForSelectionChange(oldSelection, m_selectionRange);
2198     }
2199     m_selectionAnchor = -2;
2200 }
2201
2202 static bool wxIsWordDelimiter(const wxString& text)
2203 {
2204     return !text.IsEmpty() && !wxIsalnum(text[0]);
2205 }
2206
2207 /// Select the word at the given character position
2208 bool wxRichTextCtrl::SelectWord(long position)
2209 {
2210     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
2211         return false;
2212
2213     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
2214     if (!para)
2215         return false;
2216
2217     if (position == para->GetRange().GetEnd())
2218         position --;
2219
2220     long positionStart = position;
2221     long positionEnd = position;
2222
2223     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
2224     {
2225         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
2226         if (wxIsWordDelimiter(text))
2227         {
2228             positionStart ++;
2229             break;
2230         }
2231     }
2232     if (positionStart < para->GetRange().GetStart())
2233         positionStart = para->GetRange().GetStart();
2234
2235     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
2236     {
2237         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
2238         if (wxIsWordDelimiter(text))
2239         {
2240             positionEnd --;
2241             break;
2242         }
2243     }
2244     if (positionEnd >= para->GetRange().GetEnd())
2245         positionEnd = para->GetRange().GetEnd();
2246
2247     if (positionEnd < positionStart)
2248         return false;
2249
2250     SetSelection(positionStart, positionEnd+1);
2251
2252     if (positionStart >= 0)
2253     {
2254         MoveCaret(positionStart-1, true);
2255         SetDefaultStyleToCursorStyle();
2256     }
2257
2258     return true;
2259 }
2260
2261 wxString wxRichTextCtrl::GetStringSelection() const
2262 {
2263     long from, to;
2264     GetSelection(&from, &to);
2265
2266     return GetRange(from, to);
2267 }
2268
2269 // ----------------------------------------------------------------------------
2270 // hit testing
2271 // ----------------------------------------------------------------------------
2272
2273 wxTextCtrlHitTestResult
2274 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2275 {
2276     // implement in terms of the other overload as the native ports typically
2277     // can get the position and not (x, y) pair directly (although wxUniv
2278     // directly gets x and y -- and so overrides this method as well)
2279     long pos;
2280     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2281
2282     if ( rc != wxTE_HT_UNKNOWN )
2283     {
2284         PositionToXY(pos, x, y);
2285     }
2286
2287     return rc;
2288 }
2289
2290 wxTextCtrlHitTestResult
2291 wxRichTextCtrl::HitTest(const wxPoint& pt,
2292                         long * pos) const
2293 {
2294     wxClientDC dc((wxRichTextCtrl*) this);
2295     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2296
2297     // Buffer uses logical position (relative to start of buffer)
2298     // so convert
2299     wxPoint pt2 = GetLogicalPoint(pt);
2300
2301     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
2302
2303     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2304         return wxTE_HT_BEFORE;
2305     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2306         return wxTE_HT_BEYOND;
2307     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2308         return wxTE_HT_ON_TEXT;
2309
2310     return wxTE_HT_UNKNOWN;
2311 }
2312
2313 // ----------------------------------------------------------------------------
2314 // set/get the controls text
2315 // ----------------------------------------------------------------------------
2316
2317 wxString wxRichTextCtrl::DoGetValue() const
2318 {
2319     return GetBuffer().GetText();
2320 }
2321
2322 wxString wxRichTextCtrl::GetRange(long from, long to) const
2323 {
2324     // Public API for range is different from internals
2325     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2326 }
2327
2328 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2329 {
2330     // Don't call Clear here, since it always sends a text updated event
2331     m_buffer.ResetAndClearCommands();
2332     m_buffer.SetDirty(true);
2333     m_caretPosition = -1;
2334     m_caretPositionForDefaultStyle = -2;
2335     m_caretAtLineStart = false;
2336     m_selectionRange.SetRange(-2, -2);
2337
2338     Scroll(0,0);
2339
2340     if (!IsFrozen())
2341     {
2342         LayoutContent();
2343         Refresh(false);
2344     }
2345
2346     if (!value.IsEmpty())
2347     {
2348         // Remove empty paragraph
2349         GetBuffer().Clear();
2350         DoWriteText(value, flags);
2351
2352         // for compatibility, don't move the cursor when doing SetValue()
2353         SetInsertionPoint(0);
2354     }
2355     else
2356     {
2357         // still send an event for consistency
2358         if (flags & SetValue_SendEvent)
2359             wxTextCtrl::SendTextUpdatedEvent(this);
2360     }
2361     DiscardEdits();
2362 }
2363
2364 void wxRichTextCtrl::WriteText(const wxString& value)
2365 {
2366     DoWriteText(value);
2367 }
2368
2369 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2370 {
2371     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2372
2373     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2374
2375     if ( flags & SetValue_SendEvent )
2376         wxTextCtrl::SendTextUpdatedEvent(this);
2377 }
2378
2379 void wxRichTextCtrl::AppendText(const wxString& text)
2380 {
2381     SetInsertionPointEnd();
2382
2383     WriteText(text);
2384 }
2385
2386 /// Write an image at the current insertion point
2387 bool wxRichTextCtrl::WriteImage(const wxImage& image, wxBitmapType bitmapType)
2388 {
2389     wxRichTextImageBlock imageBlock;
2390
2391     wxImage image2 = image;
2392     if (imageBlock.MakeImageBlock(image2, bitmapType))
2393         return WriteImage(imageBlock);
2394
2395     return false;
2396 }
2397
2398 bool wxRichTextCtrl::WriteImage(const wxString& filename, wxBitmapType bitmapType)
2399 {
2400     wxRichTextImageBlock imageBlock;
2401
2402     wxImage image;
2403     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2404         return WriteImage(imageBlock);
2405
2406     return false;
2407 }
2408
2409 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2410 {
2411     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2412 }
2413
2414 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, wxBitmapType bitmapType)
2415 {
2416     if (bitmap.Ok())
2417     {
2418         wxRichTextImageBlock imageBlock;
2419
2420         wxImage image = bitmap.ConvertToImage();
2421         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2422             return WriteImage(imageBlock);
2423     }
2424
2425     return false;
2426 }
2427
2428 /// Insert a newline (actually paragraph) at the current insertion point.
2429 bool wxRichTextCtrl::Newline()
2430 {
2431     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2432 }
2433
2434 /// Insert a line break at the current insertion point.
2435 bool wxRichTextCtrl::LineBreak()
2436 {
2437     wxString text;
2438     text = wxRichTextLineBreakChar;
2439     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2440 }
2441
2442 // ----------------------------------------------------------------------------
2443 // Clipboard operations
2444 // ----------------------------------------------------------------------------
2445
2446 void wxRichTextCtrl::Copy()
2447 {
2448     if (CanCopy())
2449     {
2450         wxRichTextRange range = GetInternalSelectionRange();
2451         GetBuffer().CopyToClipboard(range);
2452     }
2453 }
2454
2455 void wxRichTextCtrl::Cut()
2456 {
2457     if (CanCut())
2458     {
2459         wxRichTextRange range = GetInternalSelectionRange();
2460         GetBuffer().CopyToClipboard(range);
2461
2462         DeleteSelectedContent();
2463         LayoutContent();
2464         Refresh(false);
2465     }
2466 }
2467
2468 void wxRichTextCtrl::Paste()
2469 {
2470     if (CanPaste())
2471     {
2472         BeginBatchUndo(_("Paste"));
2473
2474         long newPos = m_caretPosition;
2475         DeleteSelectedContent(& newPos);
2476
2477         GetBuffer().PasteFromClipboard(newPos);
2478
2479         EndBatchUndo();
2480     }
2481 }
2482
2483 void wxRichTextCtrl::DeleteSelection()
2484 {
2485     if (CanDeleteSelection())
2486     {
2487         DeleteSelectedContent();
2488     }
2489 }
2490
2491 bool wxRichTextCtrl::HasSelection() const
2492 {
2493     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2494 }
2495
2496 bool wxRichTextCtrl::CanCopy() const
2497 {
2498     // Can copy if there's a selection
2499     return HasSelection();
2500 }
2501
2502 bool wxRichTextCtrl::CanCut() const
2503 {
2504     return HasSelection() && IsEditable();
2505 }
2506
2507 bool wxRichTextCtrl::CanPaste() const
2508 {
2509     if ( !IsEditable() )
2510         return false;
2511
2512     return GetBuffer().CanPasteFromClipboard();
2513 }
2514
2515 bool wxRichTextCtrl::CanDeleteSelection() const
2516 {
2517     return HasSelection() && IsEditable();
2518 }
2519
2520
2521 // ----------------------------------------------------------------------------
2522 // Accessors
2523 // ----------------------------------------------------------------------------
2524
2525 void wxRichTextCtrl::SetContextMenu(wxMenu* menu)
2526 {
2527     if (m_contextMenu && m_contextMenu != menu)
2528         delete m_contextMenu;
2529     m_contextMenu = menu;
2530 }
2531
2532 void wxRichTextCtrl::SetEditable(bool editable)
2533 {
2534     m_editable = editable;
2535 }
2536
2537 void wxRichTextCtrl::SetInsertionPoint(long pos)
2538 {
2539     SelectNone();
2540
2541     m_caretPosition = pos - 1;
2542
2543     PositionCaret();
2544
2545     SetDefaultStyleToCursorStyle();
2546 }
2547
2548 void wxRichTextCtrl::SetInsertionPointEnd()
2549 {
2550     long pos = GetLastPosition();
2551     SetInsertionPoint(pos);
2552 }
2553
2554 long wxRichTextCtrl::GetInsertionPoint() const
2555 {
2556     return m_caretPosition+1;
2557 }
2558
2559 wxTextPos wxRichTextCtrl::GetLastPosition() const
2560 {
2561     return GetBuffer().GetRange().GetEnd();
2562 }
2563
2564 // If the return values from and to are the same, there is no
2565 // selection.
2566 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2567 {
2568     *from = m_selectionRange.GetStart();
2569     *to = m_selectionRange.GetEnd();
2570     if ((*to) != -1 && (*to) != -2)
2571         (*to) ++;
2572 }
2573
2574 bool wxRichTextCtrl::IsEditable() const
2575 {
2576     return m_editable;
2577 }
2578
2579 // ----------------------------------------------------------------------------
2580 // selection
2581 // ----------------------------------------------------------------------------
2582
2583 void wxRichTextCtrl::SetSelection(long from, long to)
2584 {
2585     // if from and to are both -1, it means (in wxWidgets) that all text should
2586     // be selected.
2587     if ( (from == -1) && (to == -1) )
2588     {
2589         from = 0;
2590         to = GetLastPosition()+1;
2591     }
2592
2593     if (from == to)
2594     {
2595         SelectNone();
2596     }
2597     else
2598     {
2599         wxRichTextRange oldSelection = m_selectionRange;
2600         m_selectionAnchor = from-1;
2601         m_selectionRange.SetRange(from, to-1);
2602
2603         m_caretPosition = wxMax(-1, to-2);
2604
2605         RefreshForSelectionChange(oldSelection, m_selectionRange);
2606         PositionCaret();
2607     }
2608 }
2609
2610 // ----------------------------------------------------------------------------
2611 // Editing
2612 // ----------------------------------------------------------------------------
2613
2614 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2615                              const wxString& value)
2616 {
2617     BeginBatchUndo(_("Replace"));
2618
2619     DeleteSelectedContent();
2620
2621     DoWriteText(value, SetValue_SelectionOnly);
2622
2623     EndBatchUndo();
2624 }
2625
2626 void wxRichTextCtrl::Remove(long from, long to)
2627 {
2628     SelectNone();
2629
2630     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to-1), this);
2631
2632     LayoutContent();
2633     if (!IsFrozen())
2634         Refresh(false);
2635 }
2636
2637 bool wxRichTextCtrl::IsModified() const
2638 {
2639     return m_buffer.IsModified();
2640 }
2641
2642 void wxRichTextCtrl::MarkDirty()
2643 {
2644     m_buffer.Modify(true);
2645 }
2646
2647 void wxRichTextCtrl::DiscardEdits()
2648 {
2649     m_caretPositionForDefaultStyle = -2;
2650     m_buffer.Modify(false);
2651     m_buffer.GetCommandProcessor()->ClearCommands();
2652 }
2653
2654 int wxRichTextCtrl::GetNumberOfLines() const
2655 {
2656     return GetBuffer().GetParagraphCount();
2657 }
2658
2659 // ----------------------------------------------------------------------------
2660 // Positions <-> coords
2661 // ----------------------------------------------------------------------------
2662
2663 long wxRichTextCtrl::XYToPosition(long x, long y) const
2664 {
2665     return GetBuffer().XYToPosition(x, y);
2666 }
2667
2668 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2669 {
2670     return GetBuffer().PositionToXY(pos, x, y);
2671 }
2672
2673 // ----------------------------------------------------------------------------
2674 //
2675 // ----------------------------------------------------------------------------
2676
2677 void wxRichTextCtrl::ShowPosition(long pos)
2678 {
2679     if (!IsPositionVisible(pos))
2680         ScrollIntoView(pos-1, WXK_DOWN);
2681 }
2682
2683 int wxRichTextCtrl::GetLineLength(long lineNo) const
2684 {
2685     return GetBuffer().GetParagraphLength(lineNo);
2686 }
2687
2688 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2689 {
2690     return GetBuffer().GetParagraphText(lineNo);
2691 }
2692
2693 // ----------------------------------------------------------------------------
2694 // Undo/redo
2695 // ----------------------------------------------------------------------------
2696
2697 void wxRichTextCtrl::Undo()
2698 {
2699     if (CanUndo())
2700     {
2701         GetCommandProcessor()->Undo();
2702     }
2703 }
2704
2705 void wxRichTextCtrl::Redo()
2706 {
2707     if (CanRedo())
2708     {
2709         GetCommandProcessor()->Redo();
2710     }
2711 }
2712
2713 bool wxRichTextCtrl::CanUndo() const
2714 {
2715     return GetCommandProcessor()->CanUndo();
2716 }
2717
2718 bool wxRichTextCtrl::CanRedo() const
2719 {
2720     return GetCommandProcessor()->CanRedo();
2721 }
2722
2723 // ----------------------------------------------------------------------------
2724 // implementation details
2725 // ----------------------------------------------------------------------------
2726
2727 void wxRichTextCtrl::Command(wxCommandEvent& event)
2728 {
2729     SetValue(event.GetString());
2730     GetEventHandler()->ProcessEvent(event);
2731 }
2732
2733 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2734 {
2735     // By default, load the first file into the text window.
2736     if (event.GetNumberOfFiles() > 0)
2737     {
2738         LoadFile(event.GetFiles()[0]);
2739     }
2740 }
2741
2742 wxSize wxRichTextCtrl::DoGetBestSize() const
2743 {
2744     return wxSize(10, 10);
2745 }
2746
2747 // ----------------------------------------------------------------------------
2748 // standard handlers for standard edit menu events
2749 // ----------------------------------------------------------------------------
2750
2751 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2752 {
2753     Cut();
2754 }
2755
2756 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2757 {
2758     DeleteSelection();
2759 }
2760
2761 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2762 {
2763     Copy();
2764 }
2765
2766 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2767 {
2768     Paste();
2769 }
2770
2771 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2772 {
2773     Undo();
2774 }
2775
2776 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2777 {
2778     Redo();
2779 }
2780
2781 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2782 {
2783     event.Enable( CanCut() );
2784 }
2785
2786 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2787 {
2788     event.Enable( CanCopy() );
2789 }
2790
2791 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2792 {
2793     event.Enable( CanDeleteSelection() );
2794 }
2795
2796 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2797 {
2798     event.Enable( CanPaste() );
2799 }
2800
2801 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2802 {
2803     event.Enable( CanUndo() );
2804     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2805 }
2806
2807 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2808 {
2809     event.Enable( CanRedo() );
2810     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2811 }
2812
2813 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2814 {
2815     if (GetLastPosition() > 0)
2816         SelectAll();
2817 }
2818
2819 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2820 {
2821     event.Enable(GetLastPosition() > 0);
2822 }
2823
2824 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2825 {
2826     if (event.GetEventObject() != this)
2827     {
2828         event.Skip();
2829         return;
2830     }
2831
2832     if (m_contextMenu)
2833         PopupMenu(m_contextMenu);
2834     return;
2835 }
2836
2837 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2838 {
2839     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttr(style));
2840 }
2841
2842 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxTextAttr& style)
2843 {
2844     return GetBuffer().SetStyle(range.ToInternal(), style);
2845 }
2846
2847 // extended style setting operation with flags including:
2848 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2849 // see richtextbuffer.h for more details.
2850
2851 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttr& style, int flags)
2852 {
2853     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2854 }
2855
2856 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2857 {
2858     return GetBuffer().SetDefaultStyle(wxTextAttr(style));
2859 }
2860
2861 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2862 {
2863     return GetBuffer().GetDefaultStyle();
2864 }
2865
2866 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2867 {
2868     return GetBuffer().GetStyle(position, style);
2869 }
2870
2871 // get the common set of styles for the range
2872 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttr& style)
2873 {
2874     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2875 }
2876
2877 /// Get the content (uncombined) attributes for this position.
2878 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2879 {
2880     return GetBuffer().GetUncombinedStyle(position, style);
2881 }
2882
2883 /// Set font, and also the buffer attributes
2884 bool wxRichTextCtrl::SetFont(const wxFont& font)
2885 {
2886     wxTextCtrlBase::SetFont(font);
2887
2888     wxTextAttr attr = GetBuffer().GetAttributes();
2889     attr.SetFont(font);
2890     GetBuffer().SetBasicStyle(attr);
2891
2892     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2893     Refresh(false);
2894
2895     return true;
2896 }
2897
2898 /// Transform logical to physical
2899 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2900 {
2901     wxPoint pt;
2902     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2903
2904     return pt;
2905 }
2906
2907 /// Transform physical to logical
2908 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2909 {
2910     wxPoint pt;
2911     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2912
2913     return pt;
2914 }
2915
2916 /// Position the caret
2917 void wxRichTextCtrl::PositionCaret()
2918 {
2919     if (!GetCaret())
2920         return;
2921
2922     //wxLogDebug(wxT("PositionCaret"));
2923
2924     wxRect caretRect;
2925     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2926     {
2927         wxPoint newPt = caretRect.GetPosition();
2928         wxSize newSz = caretRect.GetSize();
2929         wxPoint pt = GetPhysicalPoint(newPt);
2930         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
2931         {
2932             GetCaret()->Hide();
2933             if (GetCaret()->GetSize() != newSz)
2934                 GetCaret()->SetSize(newSz);
2935
2936             int halfSize = newSz.y/2;
2937             // If the caret is beyond the margin, hide it by moving it out of the way
2938             if (((pt.y + halfSize) < GetBuffer().GetTopMargin()) || ((pt.y + halfSize) > (GetClientSize().y - GetBuffer().GetBottomMargin())))
2939                 pt.y = -200;
2940
2941             GetCaret()->Move(pt);
2942             GetCaret()->Show();
2943         }
2944     }
2945 }
2946
2947 /// Get the caret height and position for the given character position
2948 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2949 {
2950     wxClientDC dc(this);
2951     dc.SetFont(GetFont());
2952
2953     PrepareDC(dc);
2954
2955     wxPoint pt;
2956     int height = 0;
2957
2958     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2959     {
2960         // Caret height can't be zero
2961         if (height == 0)
2962             height = dc.GetCharHeight();
2963
2964         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2965         return true;
2966     }
2967
2968     return false;
2969 }
2970
2971 /// Gets the line for the visible caret position. If the caret is
2972 /// shown at the very end of the line, it means the next character is actually
2973 /// on the following line. So let's get the line we're expecting to find
2974 /// if this is the case.
2975 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2976 {
2977     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2978     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2979     if (line)
2980     {
2981         wxRichTextRange lineRange = line->GetAbsoluteRange();
2982         if (caretPosition == lineRange.GetStart()-1 &&
2983             (para->GetRange().GetStart() != lineRange.GetStart()))
2984         {
2985             if (!m_caretAtLineStart)
2986                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2987         }
2988     }
2989     return line;
2990 }
2991
2992
2993 /// Move the caret to the given character position
2994 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2995 {
2996     if (GetBuffer().GetDirty())
2997         LayoutContent();
2998
2999     if (pos <= GetBuffer().GetRange().GetEnd())
3000     {
3001         SetCaretPosition(pos, showAtLineStart);
3002
3003         PositionCaret();
3004
3005         return true;
3006     }
3007     else
3008         return false;
3009 }
3010
3011 /// Layout the buffer: which we must do before certain operations, such as
3012 /// setting the caret position.
3013 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
3014 {
3015     if (GetBuffer().GetDirty() || onlyVisibleRect)
3016     {
3017         wxRect availableSpace(GetClientSize());
3018         if (availableSpace.width == 0)
3019             availableSpace.width = 10;
3020         if (availableSpace.height == 0)
3021             availableSpace.height = 10;
3022
3023         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
3024         if (onlyVisibleRect)
3025         {
3026             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
3027             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
3028         }
3029
3030         wxClientDC dc(this);
3031         dc.SetFont(GetFont());
3032
3033         PrepareDC(dc);
3034
3035         GetBuffer().Defragment();
3036         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
3037         GetBuffer().Layout(dc, availableSpace, flags);
3038         GetBuffer().SetDirty(false);
3039
3040         if (!IsFrozen())
3041             SetupScrollbars();
3042     }
3043
3044     return true;
3045 }
3046
3047 /// Is all of the selection bold?
3048 bool wxRichTextCtrl::IsSelectionBold()
3049 {
3050     if (HasSelection())
3051     {
3052         wxTextAttr attr;
3053         wxRichTextRange range = GetSelectionRange();
3054         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3055         attr.SetFontWeight(wxFONTWEIGHT_BOLD);
3056
3057         return HasCharacterAttributes(range, attr);
3058     }
3059     else
3060     {
3061         // If no selection, then we need to combine current style with default style
3062         // to see what the effect would be if we started typing.
3063         wxTextAttr attr;
3064         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3065
3066         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3067         if (GetStyle(pos, attr))
3068         {
3069             if (IsDefaultStyleShowing())
3070                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3071             return attr.GetFontWeight() == wxFONTWEIGHT_BOLD;
3072         }
3073     }
3074     return false;
3075 }
3076
3077 /// Is all of the selection italics?
3078 bool wxRichTextCtrl::IsSelectionItalics()
3079 {
3080     if (HasSelection())
3081     {
3082         wxRichTextRange range = GetSelectionRange();
3083         wxTextAttr attr;
3084         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3085         attr.SetFontStyle(wxFONTSTYLE_ITALIC);
3086
3087         return HasCharacterAttributes(range, attr);
3088     }
3089     else
3090     {
3091         // If no selection, then we need to combine current style with default style
3092         // to see what the effect would be if we started typing.
3093         wxTextAttr attr;
3094         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3095
3096         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3097         if (GetStyle(pos, attr))
3098         {
3099             if (IsDefaultStyleShowing())
3100                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3101             return attr.GetFontStyle() == wxFONTSTYLE_ITALIC;
3102         }
3103     }
3104     return false;
3105 }
3106
3107 /// Is all of the selection underlined?
3108 bool wxRichTextCtrl::IsSelectionUnderlined()
3109 {
3110     if (HasSelection())
3111     {
3112         wxRichTextRange range = GetSelectionRange();
3113         wxTextAttr attr;
3114         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3115         attr.SetFontUnderlined(true);
3116
3117         return HasCharacterAttributes(range, attr);
3118     }
3119     else
3120     {
3121         // If no selection, then we need to combine current style with default style
3122         // to see what the effect would be if we started typing.
3123         wxTextAttr attr;
3124         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3125         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3126
3127         if (GetStyle(pos, attr))
3128         {
3129             if (IsDefaultStyleShowing())
3130                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3131             return attr.GetFontUnderlined();
3132         }
3133     }
3134     return false;
3135 }
3136
3137 /// Apply bold to the selection
3138 bool wxRichTextCtrl::ApplyBoldToSelection()
3139 {
3140     wxTextAttr attr;
3141     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3142     attr.SetFontWeight(IsSelectionBold() ? wxFONTWEIGHT_NORMAL : wxFONTWEIGHT_BOLD);
3143
3144     if (HasSelection())
3145         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3146     else
3147     {
3148         wxRichTextAttr current = GetDefaultStyleEx();
3149         current.Apply(attr);
3150         SetAndShowDefaultStyle(current);
3151     }
3152     return true;
3153 }
3154
3155 /// Apply italic to the selection
3156 bool wxRichTextCtrl::ApplyItalicToSelection()
3157 {
3158     wxTextAttr attr;
3159     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3160     attr.SetFontStyle(IsSelectionItalics() ? wxFONTSTYLE_NORMAL : wxFONTSTYLE_ITALIC);
3161
3162     if (HasSelection())
3163         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3164     else
3165     {
3166         wxRichTextAttr current = GetDefaultStyleEx();
3167         current.Apply(attr);
3168         SetAndShowDefaultStyle(current);
3169     }
3170     return true;
3171 }
3172
3173 /// Apply underline to the selection
3174 bool wxRichTextCtrl::ApplyUnderlineToSelection()
3175 {
3176     wxTextAttr attr;
3177     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3178     attr.SetFontUnderlined(!IsSelectionUnderlined());
3179
3180     if (HasSelection())
3181         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3182     else
3183     {
3184         wxRichTextAttr current = GetDefaultStyleEx();
3185         current.Apply(attr);
3186         SetAndShowDefaultStyle(current);
3187     }
3188     return true;
3189 }
3190
3191 /// Is all of the selection aligned according to the specified flag?
3192 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
3193 {
3194     wxRichTextRange range;
3195     if (HasSelection())
3196         range = GetSelectionRange();
3197     else
3198         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
3199
3200     wxTextAttr attr;
3201     attr.SetAlignment(alignment);
3202
3203     return HasParagraphAttributes(range, attr);
3204 }
3205
3206 /// Apply alignment to the selection
3207 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
3208 {
3209     wxTextAttr attr;
3210     attr.SetAlignment(alignment);
3211     if (HasSelection())
3212         return SetStyle(GetSelectionRange(), attr);
3213     else
3214     {
3215         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
3216         if (para)
3217             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
3218     }
3219     return true;
3220 }
3221
3222 /// Apply a named style to the selection
3223 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
3224 {
3225     // Flags are defined within each definition, so only certain
3226     // attributes are applied.
3227     wxTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
3228
3229     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_RESET;
3230
3231     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
3232     {
3233         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3234
3235         wxRichTextRange range;
3236
3237         if (HasSelection())
3238             range = GetSelectionRange();
3239         else
3240         {
3241             long pos = GetAdjustedCaretPosition(GetCaretPosition());
3242             range = wxRichTextRange(pos, pos+1);
3243         }
3244
3245         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
3246     }
3247
3248     // Make sure the attr has the style name
3249     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
3250     {
3251         attr.SetParagraphStyleName(def->GetName());
3252
3253         // If applying a paragraph style, we only want the paragraph nodes to adopt these
3254         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
3255         // to change its style independently.
3256         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3257     }
3258     else
3259         attr.SetCharacterStyleName(def->GetName());
3260
3261     if (HasSelection())
3262         return SetStyleEx(GetSelectionRange(), attr, flags);
3263     else
3264     {
3265         wxRichTextAttr current = GetDefaultStyleEx();
3266         current.Apply(attr);
3267         SetAndShowDefaultStyle(current);
3268         return true;
3269     }
3270 }
3271
3272 /// Apply the style sheet to the buffer, for example if the styles have changed.
3273 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
3274 {
3275     if (!styleSheet)
3276         styleSheet = GetBuffer().GetStyleSheet();
3277     if (!styleSheet)
3278         return false;
3279
3280     if (GetBuffer().ApplyStyleSheet(styleSheet))
3281     {
3282         GetBuffer().Invalidate(wxRICHTEXT_ALL);
3283         Refresh(false);
3284         return true;
3285     }
3286     else
3287         return false;
3288 }
3289
3290 /// Sets the default style to the style under the cursor
3291 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3292 {
3293     wxTextAttr attr;
3294     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3295
3296     // If at the start of a paragraph, use the next position.
3297     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3298
3299     if (GetUncombinedStyle(pos, attr))
3300     {
3301         SetDefaultStyle(attr);
3302         return true;
3303     }
3304
3305     return false;
3306 }
3307
3308 /// Returns the first visible position in the current view
3309 long wxRichTextCtrl::GetFirstVisiblePosition() const
3310 {
3311     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3312     if (line)
3313         return line->GetAbsoluteRange().GetStart();
3314     else
3315         return 0;
3316 }
3317
3318 /// Get the first visible point in the window
3319 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3320 {
3321     int ppuX, ppuY;
3322     int startXUnits, startYUnits;
3323
3324     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3325     GetViewStart(& startXUnits, & startYUnits);
3326
3327     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3328 }
3329
3330 /// The adjusted caret position is the character position adjusted to take
3331 /// into account whether we're at the start of a paragraph, in which case
3332 /// style information should be taken from the next position, not current one.
3333 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3334 {
3335     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3336
3337     if (para && (caretPos+1 == para->GetRange().GetStart()))
3338         caretPos ++;
3339     return caretPos;
3340 }
3341
3342 /// Get/set the selection range in character positions. -1, -1 means no selection.
3343 /// The range is in API convention, i.e. a single character selection is denoted
3344 /// by (n, n+1)
3345 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3346 {
3347     wxRichTextRange range = GetInternalSelectionRange();
3348     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3349         range.SetEnd(range.GetEnd() + 1);
3350     return range;
3351 }
3352
3353 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3354 {
3355     SetSelection(range.GetStart(), range.GetEnd());
3356 }
3357
3358 /// Set list style
3359 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3360 {
3361     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3362 }
3363
3364 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3365 {
3366     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3367 }
3368
3369 /// Clear list for given range
3370 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3371 {
3372     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3373 }
3374
3375 /// Number/renumber any list elements in the given range
3376 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3377 {
3378     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3379 }
3380
3381 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3382 {
3383     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3384 }
3385
3386 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3387 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3388 {
3389     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3390 }
3391
3392 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3393 {
3394     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3395 }
3396
3397 /// Deletes the content in the given range
3398 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3399 {
3400     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3401 }
3402
3403 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3404 {
3405     if (sm_availableFontNames.GetCount() == 0)
3406     {
3407         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3408         sm_availableFontNames.Sort();
3409     }
3410     return sm_availableFontNames;
3411 }
3412
3413 void wxRichTextCtrl::ClearAvailableFontNames()
3414 {
3415     sm_availableFontNames.Clear();
3416 }
3417
3418 void wxRichTextCtrl::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
3419 {
3420     //wxLogDebug(wxT("wxRichTextCtrl::OnSysColourChanged"));
3421
3422     wxTextAttrEx basicStyle = GetBasicStyle();
3423     basicStyle.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
3424     SetBasicStyle(basicStyle);
3425     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
3426
3427     Refresh();
3428 }
3429
3430 // Refresh the area affected by a selection change
3431 bool wxRichTextCtrl::RefreshForSelectionChange(const wxRichTextRange& oldSelection, const wxRichTextRange& newSelection)
3432 {
3433     // Calculate the refresh rectangle - just the affected lines
3434     long firstPos, lastPos;
3435     if (oldSelection.GetStart() == -2 && newSelection.GetStart() != -2)
3436     {
3437         firstPos = newSelection.GetStart();
3438         lastPos = newSelection.GetEnd();
3439     }
3440     else if (oldSelection.GetStart() != -2 && newSelection.GetStart() == -2)
3441     {
3442         firstPos = oldSelection.GetStart();
3443         lastPos = oldSelection.GetEnd();
3444     }
3445     else if (oldSelection.GetStart() == -2 && newSelection.GetStart() == -2)
3446     {
3447         return false;
3448     }
3449     else
3450     {
3451         firstPos = wxMin(oldSelection.GetStart(), newSelection.GetStart());
3452         lastPos = wxMax(oldSelection.GetEnd(), newSelection.GetEnd());
3453     }
3454
3455     wxRichTextLine* firstLine = GetBuffer().GetLineAtPosition(firstPos);
3456     wxRichTextLine* lastLine = GetBuffer().GetLineAtPosition(lastPos);
3457
3458     if (firstLine && lastLine)
3459     {
3460         wxSize clientSize = GetClientSize();
3461         wxPoint pt1 = GetPhysicalPoint(firstLine->GetAbsolutePosition());
3462         wxPoint pt2 = GetPhysicalPoint(lastLine->GetAbsolutePosition()) + wxPoint(0, lastLine->GetSize().y);
3463
3464         pt1.x = 0;
3465         pt1.y = wxMax(0, pt1.y);
3466         pt2.x = 0;
3467         pt2.y = wxMin(clientSize.y, pt2.y);
3468
3469         wxRect rect(pt1, wxSize(clientSize.x, pt2.y - pt1.y));
3470         RefreshRect(rect, false);
3471     }
3472     else
3473         Refresh(false);
3474
3475     return true;
3476 }
3477
3478 #if wxRICHTEXT_USE_OWN_CARET
3479
3480 // ----------------------------------------------------------------------------
3481 // initialization and destruction
3482 // ----------------------------------------------------------------------------
3483
3484 void wxRichTextCaret::Init()
3485 {
3486     m_hasFocus = true;
3487
3488     m_xOld =
3489     m_yOld = -1;
3490     m_richTextCtrl = NULL;
3491     m_needsUpdate = false;
3492     m_flashOn = true;
3493 }
3494
3495 wxRichTextCaret::~wxRichTextCaret()
3496 {
3497     if (m_timer.IsRunning())
3498         m_timer.Stop();
3499 }
3500
3501 // ----------------------------------------------------------------------------
3502 // showing/hiding/moving the caret (base class interface)
3503 // ----------------------------------------------------------------------------
3504
3505 void wxRichTextCaret::DoShow()
3506 {
3507     m_flashOn = true;
3508
3509     if (!m_timer.IsRunning())
3510         m_timer.Start(GetBlinkTime());
3511
3512     Refresh();
3513 }
3514
3515 void wxRichTextCaret::DoHide()
3516 {
3517     if (m_timer.IsRunning())
3518         m_timer.Stop();
3519
3520     Refresh();
3521 }
3522
3523 void wxRichTextCaret::DoMove()
3524 {
3525     if (IsVisible())
3526     {
3527         Refresh();
3528
3529         if (m_xOld != -1 && m_yOld != -1)
3530         {
3531             if (m_richTextCtrl)
3532             {
3533                 wxRect rect(GetPosition(), GetSize());
3534                 m_richTextCtrl->RefreshRect(rect, false);
3535             }
3536         }
3537     }
3538
3539     m_xOld = m_x;
3540     m_yOld = m_y;
3541 }
3542
3543 void wxRichTextCaret::DoSize()
3544 {
3545     int countVisible = m_countVisible;
3546     if (countVisible > 0)
3547     {
3548         m_countVisible = 0;
3549         DoHide();
3550     }
3551
3552     if (countVisible > 0)
3553     {
3554         m_countVisible = countVisible;
3555         DoShow();
3556     }
3557 }
3558
3559 // ----------------------------------------------------------------------------
3560 // handling the focus
3561 // ----------------------------------------------------------------------------
3562
3563 void wxRichTextCaret::OnSetFocus()
3564 {
3565     m_hasFocus = true;
3566
3567     if ( IsVisible() )
3568         Refresh();
3569 }
3570
3571 void wxRichTextCaret::OnKillFocus()
3572 {
3573     m_hasFocus = false;
3574 }
3575
3576 // ----------------------------------------------------------------------------
3577 // drawing the caret
3578 // ----------------------------------------------------------------------------
3579
3580 void wxRichTextCaret::Refresh()
3581 {
3582     if (m_richTextCtrl)
3583     {
3584         wxRect rect(GetPosition(), GetSize());
3585         m_richTextCtrl->RefreshRect(rect, false);
3586     }
3587 }
3588
3589 void wxRichTextCaret::DoDraw(wxDC *dc)
3590 {
3591     dc->SetPen( *wxBLACK_PEN );
3592
3593     dc->SetBrush(*(m_hasFocus ? wxBLACK_BRUSH : wxTRANSPARENT_BRUSH));
3594     dc->SetPen(*wxBLACK_PEN);
3595
3596     wxPoint pt(m_x, m_y);
3597
3598     if (m_richTextCtrl)
3599     {
3600         pt = m_richTextCtrl->GetLogicalPoint(pt);
3601     }
3602     if (IsVisible() && m_flashOn)
3603         dc->DrawRectangle(pt.x, pt.y, m_width, m_height);
3604 }
3605
3606 void wxRichTextCaret::Notify()
3607 {
3608     m_flashOn = !m_flashOn;
3609     Refresh();
3610 }
3611
3612 void wxRichTextCaretTimer::Notify()
3613 {
3614     m_caret->Notify();
3615 }
3616 #endif
3617     // wxRICHTEXT_USE_OWN_CARET
3618
3619 #endif
3620     // wxUSE_RICHTEXT