src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richeditctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/textfile.h"
  30 #include "wx/ffile.h"
  31 #include "wx/filename.h"
  32 #include "wx/dcbuffer.h"
  33 #include "wx/arrimpl.cpp"
  34 #include "wx/fontenum.h"
  35 #include "wx/accel.h"
  36
  37 // DLL options compatibility check:
  38 #include "wx/app.h"
  39 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  40
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_CLICK)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK)
  45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RETURN)
  46 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CHARACTER)
  47 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_DELETE)
  48
  49 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING)
  50 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED)
  51 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING)
  52 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED)
  53
  54 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED)
  55 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED)
  56 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED)
  57 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED)
  58 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_BUFFER_RESET)
  59
  60 #if wxRICHTEXT_USE_OWN_CARET
  61
  62 /*!
  63  * wxRichTextCaret
  64  *
  65  * This implements a non-flashing cursor in case there
  66  * are platform-specific problems with the generic caret.
  67  * wxRICHTEXT_USE_OWN_CARET is set in richtextbuffer.h.
  68  */
  69
  70 class wxRichTextCaret: public wxCaret
  71 {
  72 public:
  73     // ctors
  74     // -----
  75         // default - use Create()
  76     wxRichTextCaret() { Init(); }
  77         // creates a block caret associated with the given window
  78     wxRichTextCaret(wxRichTextCtrl *window, int width, int height)
  79         : wxCaret(window, width, height) { Init(); m_richTextCtrl = window; }
  80     wxRichTextCaret(wxRichTextCtrl *window, const wxSize& size)
  81         : wxCaret(window, size) { Init(); m_richTextCtrl = window; }
  82
  83     virtual ~wxRichTextCaret();
  84
  85     // implementation
  86     // --------------
  87
  88     // called by wxWindow (not using the event tables)
  89     virtual void OnSetFocus();
  90     virtual void OnKillFocus();
  91
  92     // draw the caret on the given DC
  93     void DoDraw(wxDC *dc);
  94
  95     // get the visible count
  96     int GetVisibleCount() const { return m_countVisible; }
  97
  98     // delay repositioning
  99     bool GetNeedsUpdate() const { return m_needsUpdate; }
 100     void SetNeedsUpdate(bool needsUpdate = true ) { m_needsUpdate = needsUpdate; }
 101
 102 protected:
 103     virtual void DoShow();
 104     virtual void DoHide();
 105     virtual void DoMove();
 106     virtual void DoSize();
 107
 108     // refresh the caret
 109     void Refresh();
 110
 111 private:
 112     void Init();
 113
 114     int           m_xOld,
 115                   m_yOld;
 116     bool          m_hasFocus;       // true => our window has focus
 117     bool          m_needsUpdate;    // must be repositioned
 118
 119     wxRichTextCtrl* m_richTextCtrl;
 120 };
 121 #endif
 122
 123 IMPLEMENT_CLASS( wxRichTextCtrl, wxControl )
 124
 125 IMPLEMENT_CLASS( wxRichTextEvent, wxNotifyEvent )
 126
 127 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
 128     EVT_PAINT(wxRichTextCtrl::OnPaint)
 129     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
 130     EVT_IDLE(wxRichTextCtrl::OnIdle)
 131     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
 132     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
 133     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
 134     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
 135     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
 136     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
 137     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
 138     EVT_CHAR(wxRichTextCtrl::OnChar)
 139     EVT_KEY_DOWN(wxRichTextCtrl::OnChar)
 140     EVT_SIZE(wxRichTextCtrl::OnSize)
 141     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
 142     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
 143     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
 144     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
 145     EVT_SYS_COLOUR_CHANGED(wxRichTextCtrl::OnSysColourChanged)
 146
 147     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
 148     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
 149
 150     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
 151     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
 152
 153     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
 154     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
 155
 156     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
 157     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
 158
 159     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
 160     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
 161
 162     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
 163     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
 164
 165     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
 166     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 167 END_EVENT_TABLE()
 168
 169 /*!
 170  * wxRichTextCtrl
 171  */
 172
 173 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 174
 175 wxRichTextCtrl::wxRichTextCtrl()
 176               : wxScrollHelper(this)
 177 {
 178     Init();
 179 }
 180
 181 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 182                                wxWindowID id,
 183                                const wxString& value,
 184                                const wxPoint& pos,
 185                                const wxSize& size,
 186                                long style,
 187                                const wxValidator& validator,
 188                                const wxString& name)
 189               : wxScrollHelper(this)
 190 {
 191     Init();
 192     Create(parent, id, value, pos, size, style, validator, name);
 193 }
 194
 195 /// Creation
 196 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 197                              const wxValidator& validator, const wxString& name)
 198 {
 199     if (!wxControl::Create(parent, id, pos, size,
 200                            style|wxFULL_REPAINT_ON_RESIZE,
 201                            validator, name))
 202         return false;
 203
 204     if (!GetFont().Ok())
 205     {
 206         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 207     }
 208
 209     if (style & wxTE_READONLY)
 210         SetEditable(false);
 211
 212     // The base attributes must all have default values
 213     wxTextAttr attributes;
 214     attributes.SetFont(GetFont());
 215     attributes.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
 216     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 217     attributes.SetLineSpacing(10);
 218     attributes.SetParagraphSpacingAfter(10);
 219     attributes.SetParagraphSpacingBefore(0);
 220
 221     SetBasicStyle(attributes);
 222
 223     // The default attributes will be merged with base attributes, so
 224     // can be empty to begin with
 225     wxTextAttr defaultAttributes;
 226     SetDefaultStyle(defaultAttributes);
 227
 228     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 229     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 230
 231     GetBuffer().Reset();
 232     GetBuffer().SetRichTextCtrl(this);
 233
 234 #if wxRICHTEXT_USE_OWN_CARET
 235     SetCaret(new wxRichTextCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 236 #else
 237     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 238 #endif
 239
 240     // Tell the sizers to use the given or best size
 241     SetInitialSize(size);
 242
 243 #if wxRICHTEXT_BUFFERED_PAINTING
 244     // Create a buffer
 245     RecreateBuffer(size);
 246 #endif
 247
 248     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 249     m_urlCursor = wxCursor(wxCURSOR_HAND);
 250
 251     SetCursor(m_textCursor);
 252
 253     if (!value.IsEmpty())
 254         SetValue(value);
 255
 256     GetBuffer().AddEventHandler(this);
 257
 258     // Accelerators
 259     wxAcceleratorEntry entries[4];
 260
 261     entries[0].Set(wxACCEL_CMD,   (int) 'C',       wxID_COPY);
 262     entries[1].Set(wxACCEL_CMD,   (int) 'X',       wxID_CUT);
 263     entries[2].Set(wxACCEL_CMD,   (int) 'V',       wxID_PASTE);
 264     entries[3].Set(wxACCEL_CMD,   (int) 'A',       wxID_SELECTALL);
 265
 266     wxAcceleratorTable accel(4, entries);
 267     SetAcceleratorTable(accel);
 268
 269     return true;
 270 }
 271
 272 wxRichTextCtrl::~wxRichTextCtrl()
 273 {
 274     GetBuffer().RemoveEventHandler(this);
 275
 276     delete m_contextMenu;
 277 }
 278
 279 /// Member initialisation
 280 void wxRichTextCtrl::Init()
 281 {
 282     m_contextMenu = NULL;
 283     m_caret = NULL;
 284     m_caretPosition = -1;
 285     m_selectionRange.SetRange(-2, -2);
 286     m_selectionAnchor = -2;
 287     m_editable = true;
 288     m_caretAtLineStart = false;
 289     m_dragging = false;
 290     m_fullLayoutRequired = false;
 291     m_fullLayoutTime = 0;
 292     m_fullLayoutSavedPosition = 0;
 293     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 294     m_caretPositionForDefaultStyle = -2;
 295 }
 296
 297 void wxRichTextCtrl::DoThaw()
 298 {
 299     if (GetBuffer().GetDirty())
 300         LayoutContent();
 301     else
 302         SetupScrollbars();
 303     Refresh(false);
 304 }
 305
 306 /// Clear all text
 307 void wxRichTextCtrl::Clear()
 308 {
 309     m_buffer.ResetAndClearCommands();
 310     m_buffer.SetDirty(true);
 311     m_caretPosition = -1;
 312     m_caretPositionForDefaultStyle = -2;
 313     m_caretAtLineStart = false;
 314     m_selectionRange.SetRange(-2, -2);
 315
 316     Scroll(0,0);
 317
 318     if (!IsFrozen())
 319     {
 320         LayoutContent();
 321         Refresh(false);
 322     }
 323
 324     wxTextCtrl::SendTextUpdatedEvent(this);
 325 }
 326
 327 /// Painting
 328 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 329 {
 330 #if !wxRICHTEXT_USE_OWN_CARET
 331     if (GetCaret() && !IsFrozen())
 332         GetCaret()->Hide();
 333 #endif
 334
 335     {
 336 #if wxRICHTEXT_BUFFERED_PAINTING
 337         wxBufferedPaintDC dc(this, m_bufferBitmap);
 338 #else
 339         wxPaintDC dc(this);
 340 #endif
 341
 342         if (IsFrozen())
 343             return;
 344
 345         PrepareDC(dc);
 346
 347         dc.SetFont(GetFont());
 348
 349         // Paint the background
 350         PaintBackground(dc);
 351
 352         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 353
 354         wxRect drawingArea(GetUpdateRegion().GetBox());
 355         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 356
 357         wxRect availableSpace(GetClientSize());
 358         if (GetBuffer().GetDirty())
 359         {
 360             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 361             GetBuffer().SetDirty(false);
 362             SetupScrollbars();
 363         }
 364
 365         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 366 #if wxRICHTEXT_USE_OWN_CARET
 367         if (GetCaret()->IsVisible())
 368         {
 369             ((wxRichTextCaret*) GetCaret())->DoDraw(& dc);
 370         }
 371 #endif
 372     }
 373
 374 #if !wxRICHTEXT_USE_OWN_CARET
 375     if (GetCaret())
 376         GetCaret()->Show();
 377     PositionCaret();
 378 #endif
 379 }
 380
 381 // Empty implementation, to prevent flicker
 382 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 383 {
 384 }
 385
 386 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 387 {
 388     if (GetCaret())
 389     {
 390 #if !wxRICHTEXT_USE_OWN_CARET
 391         PositionCaret();
 392 #endif
 393         GetCaret()->Show();
 394     }
 395
 396 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 397     // Work around dropouts when control is focused
 398     if (!IsFrozen())
 399     {
 400         Refresh(false);
 401     }
 402 #endif
 403 }
 404
 405 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 406 {
 407     if (GetCaret())
 408         GetCaret()->Hide();
 409
 410 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 411     // Work around dropouts when control is focused
 412     if (!IsFrozen())
 413     {
 414         Refresh(false);
 415     }
 416 #endif
 417 }
 418
 419 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 420 {
 421     m_dragging = false;
 422 }
 423
 424 /// Left-click
 425 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 426 {
 427     SetFocus();
 428
 429     wxClientDC dc(this);
 430     PrepareDC(dc);
 431     dc.SetFont(GetFont());
 432
 433     long position = 0;
 434     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 435
 436     if (hit != wxRICHTEXT_HITTEST_NONE)
 437     {
 438         m_dragStart = event.GetLogicalPosition(dc);
 439         m_dragging = true;
 440         CaptureMouse();
 441
 442         bool caretAtLineStart = false;
 443
 444         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 445         {
 446             // If we're at the start of a line (but not first in para)
 447             // then we should keep the caret showing at the start of the line
 448             // by showing the m_caretAtLineStart flag.
 449             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 450             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 451
 452             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 453                 caretAtLineStart = true;
 454             position --;
 455         }
 456
 457         long oldCaretPos = m_caretPosition;
 458
 459         MoveCaret(position, caretAtLineStart);
 460         SetDefaultStyleToCursorStyle();
 461
 462         if (event.ShiftDown())
 463         {
 464             if (m_selectionRange.GetStart() == -2)
 465                 ExtendSelection(oldCaretPos, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 466             else
 467                 ExtendSelection(m_caretPosition, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 468         }
 469         else
 470             SelectNone();
 471     }
 472
 473     event.Skip();
 474 }
 475
 476 /// Left-up
 477 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 478 {
 479     if (m_dragging)
 480     {
 481         m_dragging = false;
 482         if (GetCapture() == this)
 483             ReleaseMouse();
 484
 485         // See if we clicked on a URL
 486         wxClientDC dc(this);
 487         PrepareDC(dc);
 488         dc.SetFont(GetFont());
 489
 490         long position = 0;
 491         wxPoint logicalPt = event.GetLogicalPosition(dc);
 492         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 493
 494         if ((hit != wxRICHTEXT_HITTEST_NONE) && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 495         {
 496             wxRichTextEvent cmdEvent(
 497                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 498                 GetId());
 499             cmdEvent.SetEventObject(this);
 500             cmdEvent.SetPosition(m_caretPosition+1);
 501
 502             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 503             {
 504                 wxTextAttr attr;
 505                 if (GetStyle(position, attr))
 506                 {
 507                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 508                     {
 509                         wxString urlTarget = attr.GetURL();
 510                         if (!urlTarget.IsEmpty())
 511                         {
 512                             wxMouseEvent mouseEvent(event);
 513
 514                             long startPos = 0, endPos = 0;
 515                             wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 516                             if (obj)
 517                             {
 518                                 startPos = obj->GetRange().GetStart();
 519                                 endPos = obj->GetRange().GetEnd();
 520                             }
 521
 522                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 523                             InitCommandEvent(urlEvent);
 524
 525                             urlEvent.SetString(urlTarget);
 526
 527                             GetEventHandler()->ProcessEvent(urlEvent);
 528                         }
 529                     }
 530                 }
 531             }
 532         }
 533     }
 534 }
 535
 536 /// Left-click
 537 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 538 {
 539     wxClientDC dc(this);
 540     PrepareDC(dc);
 541     dc.SetFont(GetFont());
 542
 543     long position = 0;
 544     wxPoint logicalPt = event.GetLogicalPosition(dc);
 545     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 546
 547     // See if we need to change the cursor
 548
 549     {
 550         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 551         {
 552             wxTextAttr attr;
 553             if (GetStyle(position, attr))
 554             {
 555                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 556                 {
 557                     SetCursor(m_urlCursor);
 558                 }
 559                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 560                 {
 561                     SetCursor(m_textCursor);
 562                 }
 563             }
 564         }
 565         else
 566             SetCursor(m_textCursor);
 567     }
 568
 569     if (!event.Dragging())
 570     {
 571         event.Skip();
 572         return;
 573     }
 574
 575     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 576     {
 577         // TODO: test closeness
 578
 579         bool caretAtLineStart = false;
 580
 581         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 582         {
 583             // If we're at the start of a line (but not first in para)
 584             // then we should keep the caret showing at the start of the line
 585             // by showing the m_caretAtLineStart flag.
 586             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 587             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 588
 589             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 590                 caretAtLineStart = true;
 591             position --;
 592         }
 593
 594         if (m_caretPosition != position)
 595         {
 596             ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 597
 598             MoveCaret(position, caretAtLineStart);
 599             SetDefaultStyleToCursorStyle();
 600         }
 601     }
 602 }
 603
 604 /// Right-click
 605 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 606 {
 607     SetFocus();
 608
 609     wxRichTextEvent cmdEvent(
 610         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 611         GetId());
 612     cmdEvent.SetEventObject(this);
 613     cmdEvent.SetPosition(m_caretPosition+1);
 614
 615     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 616         event.Skip();
 617 }
 618
 619 /// Left-double-click
 620 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 621 {
 622     wxRichTextEvent cmdEvent(
 623         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
 624         GetId());
 625     cmdEvent.SetEventObject(this);
 626     cmdEvent.SetPosition(m_caretPosition+1);
 627
 628     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 629     {
 630         SelectWord(GetCaretPosition()+1);
 631     }
 632 }
 633
 634 /// Middle-click
 635 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 636 {
 637     wxRichTextEvent cmdEvent(
 638         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
 639         GetId());
 640     cmdEvent.SetEventObject(this);
 641     cmdEvent.SetPosition(m_caretPosition+1);
 642
 643     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 644         event.Skip();
 645 }
 646
 647 /// Key press
 648 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 649 {
 650     int flags = 0;
 651     if (event.CmdDown())
 652         flags |= wxRICHTEXT_CTRL_DOWN;
 653     if (event.ShiftDown())
 654         flags |= wxRICHTEXT_SHIFT_DOWN;
 655     if (event.AltDown())
 656         flags |= wxRICHTEXT_ALT_DOWN;
 657
 658     if (event.GetEventType() == wxEVT_KEY_DOWN)
 659     {
 660         // Must process this before translation, otherwise it's translated into a WXK_DELETE event.
 661         if (event.CmdDown() && event.GetKeyCode() == WXK_BACK)
 662         {
 663             BeginBatchUndo(_("Delete Text"));
 664
 665             long newPos = m_caretPosition;
 666
 667             DeleteSelectedContent(& newPos);
 668
 669             // Submit range in character positions, which are greater than caret positions,
 670             // so subtract 1 for deleted character and add 1 for conversion to character position.
 671             if (newPos > -1)
 672             {
 673                 bool processed = false;
 674                 if (event.CmdDown())
 675                 {
 676                     long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 677                     if (pos != -1 && (pos < newPos))
 678                     {
 679                         GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this);
 680                         processed = true;
 681                     }
 682                 }
 683
 684                 if (!processed)
 685                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this);
 686             }
 687
 688             EndBatchUndo();
 689
 690             if (GetLastPosition() == -1)
 691             {
 692                 GetBuffer().Reset();
 693
 694                 m_caretPosition = -1;
 695                 PositionCaret();
 696                 SetDefaultStyleToCursorStyle();
 697             }
 698
 699             ScrollIntoView(m_caretPosition, WXK_LEFT);
 700
 701             wxRichTextEvent cmdEvent(
 702                 wxEVT_COMMAND_RICHTEXT_DELETE,
 703                 GetId());
 704             cmdEvent.SetEventObject(this);
 705             cmdEvent.SetFlags(flags);
 706             cmdEvent.SetPosition(m_caretPosition+1);
 707             GetEventHandler()->ProcessEvent(cmdEvent);
 708
 709             Update();
 710         }
 711         else
 712             event.Skip();
 713
 714         return;
 715     }
 716
 717     if (event.GetKeyCode() == WXK_LEFT ||
 718         event.GetKeyCode() == WXK_RIGHT ||
 719         event.GetKeyCode() == WXK_UP ||
 720         event.GetKeyCode() == WXK_DOWN ||
 721         event.GetKeyCode() == WXK_HOME ||
 722         event.GetKeyCode() == WXK_PAGEUP ||
 723         event.GetKeyCode() == WXK_PAGEDOWN ||
 724         event.GetKeyCode() == WXK_END ||
 725
 726         event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 727         event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 728         event.GetKeyCode() == WXK_NUMPAD_UP ||
 729         event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 730         event.GetKeyCode() == WXK_NUMPAD_HOME ||
 731         event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 732         event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 733         event.GetKeyCode() == WXK_NUMPAD_END)
 734     {
 735         KeyboardNavigate(event.GetKeyCode(), flags);
 736         return;
 737     }
 738
 739     // all the other keys modify the controls contents which shouldn't be
 740     // possible if we're read-only
 741     if ( !IsEditable() )
 742     {
 743         event.Skip();
 744         return;
 745     }
 746
 747     if (event.GetKeyCode() == WXK_RETURN)
 748     {
 749         BeginBatchUndo(_("Insert Text"));
 750
 751         long newPos = m_caretPosition;
 752
 753         DeleteSelectedContent(& newPos);
 754
 755         if (event.ShiftDown())
 756         {
 757             wxString text;
 758             text = wxRichTextLineBreakChar;
 759             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 760             m_caretAtLineStart = true;
 761             PositionCaret();
 762         }
 763         else
 764             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE|wxRICHTEXT_INSERT_INTERACTIVE);
 765
 766         EndBatchUndo();
 767         SetDefaultStyleToCursorStyle();
 768
 769         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 770
 771         wxRichTextEvent cmdEvent(
 772             wxEVT_COMMAND_RICHTEXT_RETURN,
 773             GetId());
 774         cmdEvent.SetEventObject(this);
 775         cmdEvent.SetFlags(flags);
 776         cmdEvent.SetPosition(newPos+1);
 777
 778         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 779         {
 780             // Generate conventional event
 781             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 782             InitCommandEvent(textEvent);
 783
 784             GetEventHandler()->ProcessEvent(textEvent);
 785         }
 786         Update();
 787     }
 788     else if (event.GetKeyCode() == WXK_BACK)
 789     {
 790         BeginBatchUndo(_("Delete Text"));
 791
 792         long newPos = m_caretPosition;
 793
 794         DeleteSelectedContent(& newPos);
 795
 796         // Submit range in character positions, which are greater than caret positions,
 797         // so subtract 1 for deleted character and add 1 for conversion to character position.
 798         if (newPos > -1)
 799         {
 800             bool processed = false;
 801             if (event.CmdDown())
 802             {
 803                 long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 804                 if (pos != -1 && (pos < newPos))
 805                 {
 806                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this);
 807                     processed = true;
 808                 }
 809             }
 810
 811             if (!processed)
 812                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this);
 813         }
 814
 815         EndBatchUndo();
 816
 817         if (GetLastPosition() == -1)
 818         {
 819             GetBuffer().Reset();
 820
 821             m_caretPosition = -1;
 822             PositionCaret();
 823             SetDefaultStyleToCursorStyle();
 824         }
 825
 826         ScrollIntoView(m_caretPosition, WXK_LEFT);
 827
 828         wxRichTextEvent cmdEvent(
 829             wxEVT_COMMAND_RICHTEXT_DELETE,
 830             GetId());
 831         cmdEvent.SetEventObject(this);
 832         cmdEvent.SetFlags(flags);
 833         cmdEvent.SetPosition(m_caretPosition+1);
 834         GetEventHandler()->ProcessEvent(cmdEvent);
 835
 836         Update();
 837     }
 838     else if (event.GetKeyCode() == WXK_DELETE)
 839     {
 840         BeginBatchUndo(_("Delete Text"));
 841
 842         long newPos = m_caretPosition;
 843
 844         DeleteSelectedContent(& newPos);
 845
 846         // Submit range in character positions, which are greater than caret positions,
 847         if (newPos < GetBuffer().GetRange().GetEnd()+1)
 848         {
 849             bool processed = false;
 850             if (event.CmdDown())
 851             {
 852                 long pos = wxRichTextCtrl::FindNextWordPosition(1);
 853                 if (pos != -1 && (pos > newPos))
 854                 {
 855                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos+1, pos), this);
 856                     processed = true;
 857                 }
 858             }
 859
 860             if (!processed)
 861                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos+1, newPos+1), this);
 862         }
 863
 864         EndBatchUndo();
 865
 866         if (GetLastPosition() == -1)
 867         {
 868             GetBuffer().Reset();
 869
 870             m_caretPosition = -1;
 871             PositionCaret();
 872             SetDefaultStyleToCursorStyle();
 873         }
 874
 875         wxRichTextEvent cmdEvent(
 876             wxEVT_COMMAND_RICHTEXT_DELETE,
 877             GetId());
 878         cmdEvent.SetEventObject(this);
 879         cmdEvent.SetFlags(flags);
 880         cmdEvent.SetPosition(m_caretPosition+1);
 881         GetEventHandler()->ProcessEvent(cmdEvent);
 882
 883         Update();
 884     }
 885     else
 886     {
 887         long keycode = event.GetKeyCode();
 888         switch ( keycode )
 889         {
 890             case WXK_ESCAPE:
 891             case WXK_DELETE:
 892             case WXK_START:
 893             case WXK_LBUTTON:
 894             case WXK_RBUTTON:
 895             case WXK_CANCEL:
 896             case WXK_MBUTTON:
 897             case WXK_CLEAR:
 898             case WXK_SHIFT:
 899             case WXK_ALT:
 900             case WXK_CONTROL:
 901             case WXK_MENU:
 902             case WXK_PAUSE:
 903             case WXK_CAPITAL:
 904             case WXK_END:
 905             case WXK_HOME:
 906             case WXK_LEFT:
 907             case WXK_UP:
 908             case WXK_RIGHT:
 909             case WXK_DOWN:
 910             case WXK_SELECT:
 911             case WXK_PRINT:
 912             case WXK_EXECUTE:
 913             case WXK_SNAPSHOT:
 914             case WXK_INSERT:
 915             case WXK_HELP:
 916             case WXK_NUMPAD0:
 917             case WXK_NUMPAD1:
 918             case WXK_NUMPAD2:
 919             case WXK_NUMPAD3:
 920             case WXK_NUMPAD4:
 921             case WXK_NUMPAD5:
 922             case WXK_NUMPAD6:
 923             case WXK_NUMPAD7:
 924             case WXK_NUMPAD8:
 925             case WXK_NUMPAD9:
 926             case WXK_MULTIPLY:
 927             case WXK_ADD:
 928             case WXK_SEPARATOR:
 929             case WXK_SUBTRACT:
 930             case WXK_DECIMAL:
 931             case WXK_DIVIDE:
 932             case WXK_F1:
 933             case WXK_F2:
 934             case WXK_F3:
 935             case WXK_F4:
 936             case WXK_F5:
 937             case WXK_F6:
 938             case WXK_F7:
 939             case WXK_F8:
 940             case WXK_F9:
 941             case WXK_F10:
 942             case WXK_F11:
 943             case WXK_F12:
 944             case WXK_F13:
 945             case WXK_F14:
 946             case WXK_F15:
 947             case WXK_F16:
 948             case WXK_F17:
 949             case WXK_F18:
 950             case WXK_F19:
 951             case WXK_F20:
 952             case WXK_F21:
 953             case WXK_F22:
 954             case WXK_F23:
 955             case WXK_F24:
 956             case WXK_NUMLOCK:
 957             case WXK_SCROLL:
 958             case WXK_PAGEUP:
 959             case WXK_PAGEDOWN:
 960             case WXK_NUMPAD_SPACE:
 961             case WXK_NUMPAD_TAB:
 962             case WXK_NUMPAD_ENTER:
 963             case WXK_NUMPAD_F1:
 964             case WXK_NUMPAD_F2:
 965             case WXK_NUMPAD_F3:
 966             case WXK_NUMPAD_F4:
 967             case WXK_NUMPAD_HOME:
 968             case WXK_NUMPAD_LEFT:
 969             case WXK_NUMPAD_UP:
 970             case WXK_NUMPAD_RIGHT:
 971             case WXK_NUMPAD_DOWN:
 972             case WXK_NUMPAD_PAGEUP:
 973             case WXK_NUMPAD_PAGEDOWN:
 974             case WXK_NUMPAD_END:
 975             case WXK_NUMPAD_BEGIN:
 976             case WXK_NUMPAD_INSERT:
 977             case WXK_NUMPAD_DELETE:
 978             case WXK_NUMPAD_EQUAL:
 979             case WXK_NUMPAD_MULTIPLY:
 980             case WXK_NUMPAD_ADD:
 981             case WXK_NUMPAD_SEPARATOR:
 982             case WXK_NUMPAD_SUBTRACT:
 983             case WXK_NUMPAD_DECIMAL:
 984             case WXK_WINDOWS_LEFT:
 985             {
 986                 event.Skip();
 987                 return;
 988             }
 989
 990             default:
 991             {
 992                 if (event.CmdDown() || event.AltDown())
 993                 {
 994                     event.Skip();
 995                     return;
 996                 }
 997
 998                 wxRichTextEvent cmdEvent(
 999                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
1000                     GetId());
1001                 cmdEvent.SetEventObject(this);
1002                 cmdEvent.SetFlags(flags);
1003 #if wxUSE_UNICODE
1004                 cmdEvent.SetCharacter(event.GetUnicodeKey());
1005 #else
1006                 cmdEvent.SetCharacter((wxChar) keycode);
1007 #endif
1008                 cmdEvent.SetPosition(m_caretPosition+1);
1009
1010                 if (keycode == wxT('\t'))
1011                 {
1012                     // See if we need to promote or demote the selection or paragraph at the cursor
1013                     // position, instead of inserting a tab.
1014                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
1015                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
1016                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
1017                     {
1018                         wxRichTextRange range;
1019                         if (HasSelection())
1020                             range = GetSelectionRange();
1021                         else
1022                             range = para->GetRange().FromInternal();
1023
1024                         int promoteBy = event.ShiftDown() ? 1 : -1;
1025
1026                         PromoteList(promoteBy, range, NULL);
1027
1028                         GetEventHandler()->ProcessEvent(cmdEvent);
1029
1030                         return;
1031                     }
1032                 }
1033
1034                 BeginBatchUndo(_("Insert Text"));
1035
1036                 long newPos = m_caretPosition;
1037                 DeleteSelectedContent(& newPos);
1038
1039 #if wxUSE_UNICODE
1040                 wxString str = event.GetUnicodeKey();
1041 #else
1042                 wxString str = (wxChar) event.GetKeyCode();
1043 #endif
1044                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
1045
1046                 EndBatchUndo();
1047
1048                 SetDefaultStyleToCursorStyle();
1049                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
1050
1051                 GetEventHandler()->ProcessEvent(cmdEvent);
1052
1053                 Update();
1054             }
1055         }
1056     }
1057 }
1058
1059 /// Delete content if there is a selection, e.g. when pressing a key.
1060 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
1061 {
1062     if (HasSelection())
1063     {
1064         long pos = m_selectionRange.GetStart();
1065         GetBuffer().DeleteRangeWithUndo(m_selectionRange, this);
1066         m_selectionRange.SetRange(-2, -2);
1067
1068         if (newPos)
1069             *newPos = pos-1;
1070         return true;
1071     }
1072     else
1073         return false;
1074 }
1075
1076 /// Keyboard navigation
1077
1078 /*
1079
1080 Left:       left one character
1081 Right:      right one character
1082 Up:         up one line
1083 Down:       down one line
1084 Ctrl-Left:  left one word
1085 Ctrl-Right: right one word
1086 Ctrl-Up:    previous paragraph start
1087 Ctrl-Down:  next start of paragraph
1088 Home:       start of line
1089 End:        end of line
1090 Ctrl-Home:  start of document
1091 Ctrl-End:   end of document
1092 Page-Up:    Up a screen
1093 Page-Down:  Down a screen
1094
1095 Maybe:
1096
1097 Ctrl-Alt-PgUp: Start of window
1098 Ctrl-Alt-PgDn: End of window
1099 F8:         Start selection mode
1100 Esc:        End selection mode
1101
1102 Adding Shift does the above but starts/extends selection.
1103
1104
1105  */
1106
1107 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
1108 {
1109     bool success = false;
1110
1111     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
1112     {
1113         if (flags & wxRICHTEXT_CTRL_DOWN)
1114             success = WordRight(1, flags);
1115         else
1116             success = MoveRight(1, flags);
1117     }
1118     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
1119     {
1120         if (flags & wxRICHTEXT_CTRL_DOWN)
1121             success = WordLeft(1, flags);
1122         else
1123             success = MoveLeft(1, flags);
1124     }
1125     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
1126     {
1127         if (flags & wxRICHTEXT_CTRL_DOWN)
1128             success = MoveToParagraphStart(flags);
1129         else
1130             success = MoveUp(1, flags);
1131     }
1132     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
1133     {
1134         if (flags & wxRICHTEXT_CTRL_DOWN)
1135             success = MoveToParagraphEnd(flags);
1136         else
1137             success = MoveDown(1, flags);
1138     }
1139     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
1140     {
1141         success = PageUp(1, flags);
1142     }
1143     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1144     {
1145         success = PageDown(1, flags);
1146     }
1147     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
1148     {
1149         if (flags & wxRICHTEXT_CTRL_DOWN)
1150             success = MoveHome(flags);
1151         else
1152             success = MoveToLineStart(flags);
1153     }
1154     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
1155     {
1156         if (flags & wxRICHTEXT_CTRL_DOWN)
1157             success = MoveEnd(flags);
1158         else
1159             success = MoveToLineEnd(flags);
1160     }
1161
1162     if (success)
1163     {
1164         ScrollIntoView(m_caretPosition, keyCode);
1165         SetDefaultStyleToCursorStyle();
1166     }
1167
1168     return success;
1169 }
1170
1171 /// Extend the selection. Selections are in caret positions.
1172 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
1173 {
1174     if (flags & wxRICHTEXT_SHIFT_DOWN)
1175     {
1176         if (oldPos == newPos)
1177             return false;
1178
1179         wxRichTextRange oldSelection = m_selectionRange;
1180
1181         // If not currently selecting, start selecting
1182         if (m_selectionRange.GetStart() == -2)
1183         {
1184             m_selectionAnchor = oldPos;
1185
1186             if (oldPos > newPos)
1187                 m_selectionRange.SetRange(newPos+1, oldPos);
1188             else
1189                 m_selectionRange.SetRange(oldPos+1, newPos);
1190         }
1191         else
1192         {
1193             // Always ensure that the selection range start is greater than
1194             // the end.
1195             if (newPos > m_selectionAnchor)
1196                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
1197             else if (newPos == m_selectionAnchor)
1198                 m_selectionRange = wxRichTextRange(-2, -2);
1199             else
1200                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
1201         }
1202
1203         RefreshForSelectionChange(oldSelection, m_selectionRange);
1204
1205         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
1206         {
1207             wxLogDebug(wxT("Strange selection range"));
1208         }
1209
1210         return true;
1211     }
1212     else
1213         return false;
1214 }
1215
1216 /// Scroll into view, returning true if we scrolled.
1217 /// This takes a _caret_ position.
1218 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1219 {
1220     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1221
1222     if (!line)
1223         return false;
1224
1225     int ppuX, ppuY;
1226     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1227
1228     int startXUnits, startYUnits;
1229     GetViewStart(& startXUnits, & startYUnits);
1230     int startY = startYUnits * ppuY;
1231
1232     int sx = 0, sy = 0;
1233     GetVirtualSize(& sx, & sy);
1234     int sxUnits = 0;
1235     int syUnits = 0;
1236     if (ppuY != 0)
1237         syUnits = sy/ppuY;
1238
1239     wxRect rect = line->GetRect();
1240
1241     bool scrolled = false;
1242
1243     wxSize clientSize = GetClientSize();
1244
1245     // Going down
1246     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1247         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1248         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1249         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1250     {
1251         if ((rect.y + rect.height) > (clientSize.y + startY))
1252         {
1253             // Make it scroll so this item is at the bottom
1254             // of the window
1255             int y = rect.y - (clientSize.y - rect.height);
1256             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1257
1258             // If we're still off the screen, scroll another line down
1259             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1260                 yUnits ++;
1261
1262             if (startYUnits != yUnits)
1263             {
1264                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1265                 scrolled = true;
1266             }
1267         }
1268         else if (rect.y < startY)
1269         {
1270             // Make it scroll so this item is at the top
1271             // of the window
1272             int y = rect.y ;
1273             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1274
1275             if (startYUnits != yUnits)
1276             {
1277                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1278                 scrolled = true;
1279             }
1280         }
1281     }
1282     // Going up
1283     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1284              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1285              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1286              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1287     {
1288         if (rect.y < startY)
1289         {
1290             // Make it scroll so this item is at the top
1291             // of the window
1292             int y = rect.y ;
1293             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1294
1295             if (startYUnits != yUnits)
1296             {
1297                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1298                 scrolled = true;
1299             }
1300         }
1301         else if ((rect.y + rect.height) > (clientSize.y + startY))
1302         {
1303             // Make it scroll so this item is at the bottom
1304             // of the window
1305             int y = rect.y - (clientSize.y - rect.height);
1306             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1307
1308             // If we're still off the screen, scroll another line down
1309             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1310                 yUnits ++;
1311
1312             if (startYUnits != yUnits)
1313             {
1314                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1315                 scrolled = true;
1316             }
1317         }
1318     }
1319
1320 #if !wxRICHTEXT_USE_OWN_CARET
1321     if (scrolled)
1322 #endif
1323         PositionCaret();
1324
1325     return scrolled;
1326 }
1327
1328 /// Is the given position visible on the screen?
1329 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1330 {
1331     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1332
1333     if (!line)
1334         return false;
1335
1336     int ppuX, ppuY;
1337     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1338
1339     int startX, startY;
1340     GetViewStart(& startX, & startY);
1341     startX = 0;
1342     startY = startY * ppuY;
1343
1344     wxRect rect = line->GetRect();
1345     wxSize clientSize = GetClientSize();
1346
1347     return (rect.GetBottom() > startY) && (rect.GetTop() < (startY + clientSize.y));
1348 }
1349
1350 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1351 {
1352     m_caretPosition = position;
1353     m_caretAtLineStart = showAtLineStart;
1354 }
1355
1356 /// Move caret one visual step forward: this may mean setting a flag
1357 /// and keeping the same position if we're going from the end of one line
1358 /// to the start of the next, which may be the exact same caret position.
1359 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1360 {
1361     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1362
1363     // Only do the check if we're not at the end of the paragraph (where things work OK
1364     // anyway)
1365     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1366     {
1367         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1368
1369         if (line)
1370         {
1371             wxRichTextRange lineRange = line->GetAbsoluteRange();
1372
1373             // We're at the end of a line. See whether we need to
1374             // stay at the same actual caret position but change visual
1375             // position, or not.
1376             if (oldPosition == lineRange.GetEnd())
1377             {
1378                 if (m_caretAtLineStart)
1379                 {
1380                     // We're already at the start of the line, so actually move on now.
1381                     m_caretPosition = oldPosition + 1;
1382                     m_caretAtLineStart = false;
1383                 }
1384                 else
1385                 {
1386                     // We're showing at the end of the line, so keep to
1387                     // the same position but indicate that we're to show
1388                     // at the start of the next line.
1389                     m_caretPosition = oldPosition;
1390                     m_caretAtLineStart = true;
1391                 }
1392                 SetDefaultStyleToCursorStyle();
1393                 return;
1394             }
1395         }
1396     }
1397     m_caretPosition ++;
1398     SetDefaultStyleToCursorStyle();
1399 }
1400
1401 /// Move caret one visual step backward: this may mean setting a flag
1402 /// and keeping the same position if we're going from the end of one line
1403 /// to the start of the next, which may be the exact same caret position.
1404 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1405 {
1406     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1407
1408     // Only do the check if we're not at the start of the paragraph (where things work OK
1409     // anyway)
1410     if (para && (oldPosition != para->GetRange().GetStart()))
1411     {
1412         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1413
1414         if (line)
1415         {
1416             wxRichTextRange lineRange = line->GetAbsoluteRange();
1417
1418             // We're at the start of a line. See whether we need to
1419             // stay at the same actual caret position but change visual
1420             // position, or not.
1421             if (oldPosition == lineRange.GetStart())
1422             {
1423                 m_caretPosition = oldPosition-1;
1424                 m_caretAtLineStart = true;
1425                 return;
1426             }
1427             else if (oldPosition == lineRange.GetEnd())
1428             {
1429                 if (m_caretAtLineStart)
1430                 {
1431                     // We're at the start of the line, so keep the same caret position
1432                     // but clear the start-of-line flag.
1433                     m_caretPosition = oldPosition;
1434                     m_caretAtLineStart = false;
1435                 }
1436                 else
1437                 {
1438                     // We're showing at the end of the line, so go back
1439                     // to the previous character position.
1440                     m_caretPosition = oldPosition - 1;
1441                 }
1442                 SetDefaultStyleToCursorStyle();
1443                 return;
1444             }
1445         }
1446     }
1447     m_caretPosition --;
1448     SetDefaultStyleToCursorStyle();
1449 }
1450
1451 /// Move right
1452 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1453 {
1454     long endPos = GetBuffer().GetRange().GetEnd();
1455
1456     if (m_caretPosition + noPositions < endPos)
1457     {
1458         long oldPos = m_caretPosition;
1459         long newPos = m_caretPosition + noPositions;
1460
1461         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1462         if (!extendSel)
1463             SelectNone();
1464
1465         // Determine by looking at oldPos and m_caretPosition whether
1466         // we moved from the end of a line to the start of the next line, in which case
1467         // we want to adjust the caret position such that it is positioned at the
1468         // start of the next line, rather than jumping past the first character of the
1469         // line.
1470         if (noPositions == 1 && !extendSel)
1471             MoveCaretForward(oldPos);
1472         else
1473             SetCaretPosition(newPos);
1474
1475         PositionCaret();
1476         SetDefaultStyleToCursorStyle();
1477
1478         return true;
1479     }
1480     else
1481         return false;
1482 }
1483
1484 /// Move left
1485 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1486 {
1487     long startPos = -1;
1488
1489     if (m_caretPosition > startPos - noPositions + 1)
1490     {
1491         long oldPos = m_caretPosition;
1492         long newPos = m_caretPosition - noPositions;
1493         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1494         if (!extendSel)
1495             SelectNone();
1496
1497         if (noPositions == 1 && !extendSel)
1498             MoveCaretBack(oldPos);
1499         else
1500             SetCaretPosition(newPos);
1501
1502         PositionCaret();
1503         SetDefaultStyleToCursorStyle();
1504
1505         return true;
1506     }
1507     else
1508         return false;
1509 }
1510
1511 /// Move up
1512 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1513 {
1514     return MoveDown(- noLines, flags);
1515 }
1516
1517 /// Move up
1518 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1519 {
1520     if (!GetCaret())
1521         return false;
1522
1523     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1524     wxPoint pt = GetCaret()->GetPosition();
1525     long newLine = lineNumber + noLines;
1526
1527     if (lineNumber != -1)
1528     {
1529         if (noLines > 0)
1530         {
1531             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1532
1533             if (newLine > lastLine)
1534                 return false;
1535         }
1536         else
1537         {
1538             if (newLine < 0)
1539                 return false;
1540         }
1541     }
1542
1543     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1544     if (lineObj)
1545     {
1546         pt.y = lineObj->GetAbsolutePosition().y + 2;
1547     }
1548     else
1549         return false;
1550
1551     long newPos = 0;
1552     wxClientDC dc(this);
1553     PrepareDC(dc);
1554     dc.SetFont(GetFont());
1555
1556     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1557
1558     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1559     {
1560         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1561         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1562         // so we view the caret at the start of the line.
1563         bool caretLineStart = false;
1564         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1565         {
1566             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1567             wxRichTextRange lineRange;
1568             if (thisLine)
1569                 lineRange = thisLine->GetAbsoluteRange();
1570
1571             if (thisLine && (newPos-1) == lineRange.GetEnd())
1572             {
1573                 newPos --;
1574                 caretLineStart = true;
1575             }
1576             else
1577             {
1578                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1579                 if (para && para->GetRange().GetStart() == newPos)
1580                     newPos --;
1581             }
1582         }
1583
1584         long newSelEnd = newPos;
1585
1586         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1587         if (!extendSel)
1588             SelectNone();
1589
1590         SetCaretPosition(newPos, caretLineStart);
1591         PositionCaret();
1592         SetDefaultStyleToCursorStyle();
1593
1594         return true;
1595     }
1596
1597     return false;
1598 }
1599
1600 /// Move to the end of the paragraph
1601 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1602 {
1603     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1604     if (para)
1605     {
1606         long newPos = para->GetRange().GetEnd() - 1;
1607         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1608         if (!extendSel)
1609             SelectNone();
1610
1611         SetCaretPosition(newPos);
1612         PositionCaret();
1613         SetDefaultStyleToCursorStyle();
1614
1615         return true;
1616     }
1617
1618     return false;
1619 }
1620
1621 /// Move to the start of the paragraph
1622 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1623 {
1624     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1625     if (para)
1626     {
1627         long newPos = para->GetRange().GetStart() - 1;
1628         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1629         if (!extendSel)
1630             SelectNone();
1631
1632         SetCaretPosition(newPos);
1633         PositionCaret();
1634         SetDefaultStyleToCursorStyle();
1635
1636         return true;
1637     }
1638
1639     return false;
1640 }
1641
1642 /// Move to the end of the line
1643 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1644 {
1645     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1646
1647     if (line)
1648     {
1649         wxRichTextRange lineRange = line->GetAbsoluteRange();
1650         long newPos = lineRange.GetEnd();
1651         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1652         if (!extendSel)
1653             SelectNone();
1654
1655         SetCaretPosition(newPos);
1656         PositionCaret();
1657         SetDefaultStyleToCursorStyle();
1658
1659         return true;
1660     }
1661
1662     return false;
1663 }
1664
1665 /// Move to the start of the line
1666 bool wxRichTextCtrl::MoveToLineStart(int flags)
1667 {
1668     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1669     if (line)
1670     {
1671         wxRichTextRange lineRange = line->GetAbsoluteRange();
1672         long newPos = lineRange.GetStart()-1;
1673
1674         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1675         if (!extendSel)
1676             SelectNone();
1677
1678         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1679
1680         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1681         PositionCaret();
1682         SetDefaultStyleToCursorStyle();
1683
1684         return true;
1685     }
1686
1687     return false;
1688 }
1689
1690 /// Move to the start of the buffer
1691 bool wxRichTextCtrl::MoveHome(int flags)
1692 {
1693     if (m_caretPosition != -1)
1694     {
1695         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1696         if (!extendSel)
1697             SelectNone();
1698
1699         SetCaretPosition(-1);
1700         PositionCaret();
1701         SetDefaultStyleToCursorStyle();
1702
1703         return true;
1704     }
1705     else
1706         return false;
1707 }
1708
1709 /// Move to the end of the buffer
1710 bool wxRichTextCtrl::MoveEnd(int flags)
1711 {
1712     long endPos = GetBuffer().GetRange().GetEnd()-1;
1713
1714     if (m_caretPosition != endPos)
1715     {
1716         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1717         if (!extendSel)
1718             SelectNone();
1719
1720         SetCaretPosition(endPos);
1721         PositionCaret();
1722         SetDefaultStyleToCursorStyle();
1723
1724         return true;
1725     }
1726     else
1727         return false;
1728 }
1729
1730 /// Move noPages pages up
1731 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1732 {
1733     return PageDown(- noPages, flags);
1734 }
1735
1736 /// Move noPages pages down
1737 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1738 {
1739     // Calculate which line occurs noPages * screen height further down.
1740     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1741     if (line)
1742     {
1743         wxSize clientSize = GetClientSize();
1744         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1745
1746         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1747         if (newLine)
1748         {
1749             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1750             long pos = lineRange.GetStart()-1;
1751             if (pos != m_caretPosition)
1752             {
1753                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1754
1755                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1756                 if (!extendSel)
1757                     SelectNone();
1758
1759                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1760                 PositionCaret();
1761                 SetDefaultStyleToCursorStyle();
1762
1763                 return true;
1764             }
1765         }
1766     }
1767
1768     return false;
1769 }
1770
1771 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1772 {
1773     return str == wxT(" ") || str == wxT("\t");
1774 }
1775
1776 // Finds the caret position for the next word
1777 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1778 {
1779     long endPos = GetBuffer().GetRange().GetEnd();
1780
1781     if (direction > 0)
1782     {
1783         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1784
1785         // First skip current text to space
1786         while (i < endPos && i > -1)
1787         {
1788             // i is in character, not caret positions
1789             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1790             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1791             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1792             {
1793                 break;
1794             }
1795             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1796                 i += direction;
1797             else
1798             {
1799                 break;
1800             }
1801         }
1802         while (i < endPos && i > -1)
1803         {
1804             // i is in character, not caret positions
1805             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1806             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1807             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1808                 return wxMax(-1, i);
1809
1810             if (text.empty()) // End of paragraph, or maybe an image
1811                 return wxMax(-1, i - 1);
1812             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1813                 i += direction;
1814             else
1815             {
1816                 // Convert to caret position
1817                 return wxMax(-1, i - 1);
1818             }
1819         }
1820         if (i >= endPos)
1821             return endPos-1;
1822         return i-1;
1823     }
1824     else
1825     {
1826         long i = m_caretPosition;
1827
1828         // First skip white space
1829         while (i < endPos && i > -1)
1830         {
1831             // i is in character, not caret positions
1832             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1833             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1834
1835             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1836                 break;
1837             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1838                 i += direction;
1839             else
1840                 break;
1841         }
1842         // Next skip current text to space
1843         while (i < endPos && i > -1)
1844         {
1845             // i is in character, not caret positions
1846             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1847             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1848             if (line && line->GetAbsoluteRange().GetStart() == i)
1849                 return i-1;
1850
1851             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1852                 i += direction;
1853             else
1854             {
1855                 return i;
1856             }
1857         }
1858         if (i < -1)
1859             return -1;
1860         return i;
1861     }
1862 }
1863
1864 /// Move n words left
1865 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1866 {
1867     long pos = FindNextWordPosition(-1);
1868     if (pos != m_caretPosition)
1869     {
1870         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1871
1872         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1873         if (!extendSel)
1874             SelectNone();
1875
1876         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1877         PositionCaret();
1878         SetDefaultStyleToCursorStyle();
1879
1880         return true;
1881     }
1882
1883     return false;
1884 }
1885
1886 /// Move n words right
1887 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1888 {
1889     long pos = FindNextWordPosition(1);
1890     if (pos != m_caretPosition)
1891     {
1892         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1893
1894         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1895         if (!extendSel)
1896             SelectNone();
1897
1898         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1899         PositionCaret();
1900         SetDefaultStyleToCursorStyle();
1901
1902         return true;
1903     }
1904
1905     return false;
1906 }
1907
1908 /// Sizing
1909 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1910 {
1911     // Only do sizing optimization for large buffers
1912     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1913     {
1914         m_fullLayoutRequired = true;
1915         m_fullLayoutTime = wxGetLocalTimeMillis();
1916         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1917         LayoutContent(true /* onlyVisibleRect */);
1918     }
1919     else
1920         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1921
1922 #if wxRICHTEXT_BUFFERED_PAINTING
1923     RecreateBuffer();
1924 #endif
1925
1926     event.Skip();
1927 }
1928
1929
1930 /// Idle-time processing
1931 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1932 {
1933 #if wxRICHTEXT_USE_OWN_CARET
1934     if (((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
1935     {
1936         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate(false);
1937         PositionCaret();
1938         GetCaret()->Show();
1939     }
1940 #endif
1941
1942     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1943
1944     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1945     {
1946         m_fullLayoutRequired = false;
1947         m_fullLayoutTime = 0;
1948         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1949         ShowPosition(m_fullLayoutSavedPosition);
1950         Refresh(false);
1951     }
1952
1953     if (m_caretPositionForDefaultStyle != -2)
1954     {
1955         // If the caret position has changed, no longer reflect the default style
1956         // in the UI.
1957         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1958             m_caretPositionForDefaultStyle = -2;
1959     }
1960
1961     event.Skip();
1962 }
1963
1964 /// Scrolling
1965 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1966 {
1967 #if wxRICHTEXT_USE_OWN_CARET
1968     if (!((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
1969     {
1970         GetCaret()->Hide();
1971         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate();
1972     }
1973 #endif
1974
1975     event.Skip();
1976 }
1977
1978 /// Set up scrollbars, e.g. after a resize
1979 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1980 {
1981     if (IsFrozen())
1982         return;
1983
1984     if (GetBuffer().IsEmpty())
1985     {
1986         SetScrollbars(0, 0, 0, 0, 0, 0);
1987         return;
1988     }
1989
1990     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1991     // of pixels. See e.g. wxVScrolledWindow for ideas.
1992     int pixelsPerUnit = 5;
1993     wxSize clientSize = GetClientSize();
1994
1995     int maxHeight = GetBuffer().GetCachedSize().y;
1996
1997     // Round up so we have at least maxHeight pixels
1998     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1999
2000     int startX = 0, startY = 0;
2001     if (!atTop)
2002         GetViewStart(& startX, & startY);
2003
2004     int maxPositionX = 0;
2005     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
2006
2007     int newStartX = wxMin(maxPositionX, startX);
2008     int newStartY = wxMin(maxPositionY, startY);
2009
2010     int oldPPUX, oldPPUY;
2011     int oldStartX, oldStartY;
2012     int oldVirtualSizeX = 0, oldVirtualSizeY = 0;
2013     GetScrollPixelsPerUnit(& oldPPUX, & oldPPUY);
2014     GetViewStart(& oldStartX, & oldStartY);
2015     GetVirtualSize(& oldVirtualSizeX, & oldVirtualSizeY);
2016     if (oldPPUY > 0)
2017         oldVirtualSizeY /= oldPPUY;
2018
2019     if (oldPPUX == 0 && oldPPUY == pixelsPerUnit && oldVirtualSizeY == unitsY && oldStartX == newStartX && oldStartY == newStartY)
2020         return;
2021
2022     // Don't set scrollbars if there were none before, and there will be none now.
2023     if (oldPPUY != 0 && (oldVirtualSizeY < clientSize.y) && (unitsY*pixelsPerUnit < clientSize.y))
2024         return;
2025
2026     // Move to previous scroll position if
2027     // possible
2028     SetScrollbars(0, pixelsPerUnit, 0, unitsY, newStartX, newStartY);
2029 }
2030
2031 /// Paint the background
2032 void wxRichTextCtrl::PaintBackground(wxDC& dc)
2033 {
2034     wxColour backgroundColour = GetBackgroundColour();
2035     if (!backgroundColour.Ok())
2036         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
2037
2038     // Clear the background
2039     dc.SetBrush(wxBrush(backgroundColour));
2040     dc.SetPen(*wxTRANSPARENT_PEN);
2041     wxRect windowRect(GetClientSize());
2042     windowRect.x -= 2; windowRect.y -= 2;
2043     windowRect.width += 4; windowRect.height += 4;
2044
2045     // We need to shift the rectangle to take into account
2046     // scrolling. Converting device to logical coordinates.
2047     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
2048     dc.DrawRectangle(windowRect);
2049 }
2050
2051 #if wxRICHTEXT_BUFFERED_PAINTING
2052 /// Recreate buffer bitmap if necessary
2053 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
2054 {
2055     wxSize sz = size;
2056     if (sz == wxDefaultSize)
2057         sz = GetClientSize();
2058
2059     if (sz.x < 1 || sz.y < 1)
2060         return false;
2061
2062     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
2063         m_bufferBitmap = wxBitmap(sz.x, sz.y);
2064     return m_bufferBitmap.Ok();
2065 }
2066 #endif
2067
2068 // ----------------------------------------------------------------------------
2069 // file IO functions
2070 // ----------------------------------------------------------------------------
2071
2072 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
2073 {
2074     bool success = GetBuffer().LoadFile(filename, (wxRichTextFileType)fileType);
2075     if (success)
2076         m_filename = filename;
2077
2078     DiscardEdits();
2079     SetInsertionPoint(0);
2080     LayoutContent();
2081     PositionCaret();
2082     SetupScrollbars(true);
2083     Refresh(false);
2084     wxTextCtrl::SendTextUpdatedEvent(this);
2085
2086     if (success)
2087         return true;
2088     else
2089     {
2090         wxLogError(_("File couldn't be loaded."));
2091
2092         return false;
2093     }
2094 }
2095
2096 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
2097 {
2098     if (GetBuffer().SaveFile(filename, (wxRichTextFileType)fileType))
2099     {
2100         m_filename = filename;
2101
2102         DiscardEdits();
2103
2104         return true;
2105     }
2106
2107     wxLogError(_("The text couldn't be saved."));
2108
2109     return false;
2110 }
2111
2112 // ----------------------------------------------------------------------------
2113 // wxRichTextCtrl specific functionality
2114 // ----------------------------------------------------------------------------
2115
2116 /// Add a new paragraph of text to the end of the buffer
2117 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
2118 {
2119     wxRichTextRange range = GetBuffer().AddParagraph(text);
2120     LayoutContent();
2121     return range;
2122 }
2123
2124 /// Add an image
2125 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
2126 {
2127     wxRichTextRange range = GetBuffer().AddImage(image);
2128     LayoutContent();
2129     return range;
2130 }
2131
2132 // ----------------------------------------------------------------------------
2133 // selection and ranges
2134 // ----------------------------------------------------------------------------
2135
2136 void wxRichTextCtrl::SelectAll()
2137 {
2138     SetSelection(0, GetLastPosition()+1);
2139     m_selectionAnchor = -1;
2140 }
2141
2142 /// Select none
2143 void wxRichTextCtrl::SelectNone()
2144 {
2145     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
2146     {
2147         wxRichTextRange oldSelection = m_selectionRange;
2148
2149         m_selectionRange = wxRichTextRange(-2, -2);
2150
2151         RefreshForSelectionChange(oldSelection, m_selectionRange);
2152     }
2153     m_selectionAnchor = -2;
2154 }
2155
2156 static bool wxIsWordDelimiter(const wxString& text)
2157 {
2158     return !text.IsEmpty() && !wxIsalnum(text[0]);
2159 }
2160
2161 /// Select the word at the given character position
2162 bool wxRichTextCtrl::SelectWord(long position)
2163 {
2164     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
2165         return false;
2166
2167     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
2168     if (!para)
2169         return false;
2170
2171     if (position == para->GetRange().GetEnd())
2172         position --;
2173
2174     long positionStart = position;
2175     long positionEnd = position;
2176
2177     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
2178     {
2179         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
2180         if (wxIsWordDelimiter(text))
2181         {
2182             positionStart ++;
2183             break;
2184         }
2185     }
2186     if (positionStart < para->GetRange().GetStart())
2187         positionStart = para->GetRange().GetStart();
2188
2189     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
2190     {
2191         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
2192         if (wxIsWordDelimiter(text))
2193         {
2194             positionEnd --;
2195             break;
2196         }
2197     }
2198     if (positionEnd >= para->GetRange().GetEnd())
2199         positionEnd = para->GetRange().GetEnd();
2200
2201     if (positionEnd < positionStart)
2202         return false;
2203
2204     SetSelection(positionStart, positionEnd+1);
2205
2206     if (positionStart >= 0)
2207     {
2208         MoveCaret(positionStart-1, true);
2209         SetDefaultStyleToCursorStyle();
2210     }
2211
2212     return true;
2213 }
2214
2215 wxString wxRichTextCtrl::GetStringSelection() const
2216 {
2217     long from, to;
2218     GetSelection(&from, &to);
2219
2220     return GetRange(from, to);
2221 }
2222
2223 // ----------------------------------------------------------------------------
2224 // hit testing
2225 // ----------------------------------------------------------------------------
2226
2227 wxTextCtrlHitTestResult
2228 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2229 {
2230     // implement in terms of the other overload as the native ports typically
2231     // can get the position and not (x, y) pair directly (although wxUniv
2232     // directly gets x and y -- and so overrides this method as well)
2233     long pos;
2234     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2235
2236     if ( rc != wxTE_HT_UNKNOWN )
2237     {
2238         PositionToXY(pos, x, y);
2239     }
2240
2241     return rc;
2242 }
2243
2244 wxTextCtrlHitTestResult
2245 wxRichTextCtrl::HitTest(const wxPoint& pt,
2246                         long * pos) const
2247 {
2248     wxClientDC dc((wxRichTextCtrl*) this);
2249     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2250
2251     // Buffer uses logical position (relative to start of buffer)
2252     // so convert
2253     wxPoint pt2 = GetLogicalPoint(pt);
2254
2255     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
2256
2257     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2258         return wxTE_HT_BEFORE;
2259     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2260         return wxTE_HT_BEYOND;
2261     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2262         return wxTE_HT_ON_TEXT;
2263
2264     return wxTE_HT_UNKNOWN;
2265 }
2266
2267 // ----------------------------------------------------------------------------
2268 // set/get the controls text
2269 // ----------------------------------------------------------------------------
2270
2271 wxString wxRichTextCtrl::GetValue() const
2272 {
2273     return GetBuffer().GetText();
2274 }
2275
2276 wxString wxRichTextCtrl::GetRange(long from, long to) const
2277 {
2278     // Public API for range is different from internals
2279     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2280 }
2281
2282 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2283 {
2284     // Don't call Clear here, since it always sends a text updated event
2285     m_buffer.ResetAndClearCommands();
2286     m_buffer.SetDirty(true);
2287     m_caretPosition = -1;
2288     m_caretPositionForDefaultStyle = -2;
2289     m_caretAtLineStart = false;
2290     m_selectionRange.SetRange(-2, -2);
2291
2292     Scroll(0,0);
2293
2294     if (!IsFrozen())
2295     {
2296         LayoutContent();
2297         Refresh(false);
2298     }
2299
2300     if (!value.IsEmpty())
2301     {
2302         // Remove empty paragraph
2303         GetBuffer().Clear();
2304         DoWriteText(value, flags);
2305
2306         // for compatibility, don't move the cursor when doing SetValue()
2307         SetInsertionPoint(0);
2308     }
2309     else
2310     {
2311         // still send an event for consistency
2312         if (flags & SetValue_SendEvent)
2313             wxTextCtrl::SendTextUpdatedEvent(this);
2314     }
2315     DiscardEdits();
2316 }
2317
2318 void wxRichTextCtrl::WriteText(const wxString& value)
2319 {
2320     DoWriteText(value);
2321 }
2322
2323 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2324 {
2325     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2326
2327     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2328
2329     if ( flags & SetValue_SendEvent )
2330         wxTextCtrl::SendTextUpdatedEvent(this);
2331 }
2332
2333 void wxRichTextCtrl::AppendText(const wxString& text)
2334 {
2335     SetInsertionPointEnd();
2336
2337     WriteText(text);
2338 }
2339
2340 /// Write an image at the current insertion point
2341 bool wxRichTextCtrl::WriteImage(const wxImage& image, wxBitmapType bitmapType)
2342 {
2343     wxRichTextImageBlock imageBlock;
2344
2345     wxImage image2 = image;
2346     if (imageBlock.MakeImageBlock(image2, bitmapType))
2347         return WriteImage(imageBlock);
2348
2349     return false;
2350 }
2351
2352 bool wxRichTextCtrl::WriteImage(const wxString& filename, wxBitmapType bitmapType)
2353 {
2354     wxRichTextImageBlock imageBlock;
2355
2356     wxImage image;
2357     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2358         return WriteImage(imageBlock);
2359
2360     return false;
2361 }
2362
2363 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2364 {
2365     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2366 }
2367
2368 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, wxBitmapType bitmapType)
2369 {
2370     if (bitmap.Ok())
2371     {
2372         wxRichTextImageBlock imageBlock;
2373
2374         wxImage image = bitmap.ConvertToImage();
2375         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2376             return WriteImage(imageBlock);
2377     }
2378
2379     return false;
2380 }
2381
2382 /// Insert a newline (actually paragraph) at the current insertion point.
2383 bool wxRichTextCtrl::Newline()
2384 {
2385     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2386 }
2387
2388 /// Insert a line break at the current insertion point.
2389 bool wxRichTextCtrl::LineBreak()
2390 {
2391     wxString text;
2392     text = wxRichTextLineBreakChar;
2393     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2394 }
2395
2396 // ----------------------------------------------------------------------------
2397 // Clipboard operations
2398 // ----------------------------------------------------------------------------
2399
2400 void wxRichTextCtrl::Copy()
2401 {
2402     if (CanCopy())
2403     {
2404         wxRichTextRange range = GetInternalSelectionRange();
2405         GetBuffer().CopyToClipboard(range);
2406     }
2407 }
2408
2409 void wxRichTextCtrl::Cut()
2410 {
2411     if (CanCut())
2412     {
2413         wxRichTextRange range = GetInternalSelectionRange();
2414         GetBuffer().CopyToClipboard(range);
2415
2416         DeleteSelectedContent();
2417         LayoutContent();
2418         Refresh(false);
2419     }
2420 }
2421
2422 void wxRichTextCtrl::Paste()
2423 {
2424     if (CanPaste())
2425     {
2426         BeginBatchUndo(_("Paste"));
2427
2428         long newPos = m_caretPosition;
2429         DeleteSelectedContent(& newPos);
2430
2431         GetBuffer().PasteFromClipboard(newPos);
2432
2433         EndBatchUndo();
2434     }
2435 }
2436
2437 void wxRichTextCtrl::DeleteSelection()
2438 {
2439     if (CanDeleteSelection())
2440     {
2441         DeleteSelectedContent();
2442     }
2443 }
2444
2445 bool wxRichTextCtrl::HasSelection() const
2446 {
2447     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2448 }
2449
2450 bool wxRichTextCtrl::CanCopy() const
2451 {
2452     // Can copy if there's a selection
2453     return HasSelection();
2454 }
2455
2456 bool wxRichTextCtrl::CanCut() const
2457 {
2458     return HasSelection() && IsEditable();
2459 }
2460
2461 bool wxRichTextCtrl::CanPaste() const
2462 {
2463     if ( !IsEditable() )
2464         return false;
2465
2466     return GetBuffer().CanPasteFromClipboard();
2467 }
2468
2469 bool wxRichTextCtrl::CanDeleteSelection() const
2470 {
2471     return HasSelection() && IsEditable();
2472 }
2473
2474
2475 // ----------------------------------------------------------------------------
2476 // Accessors
2477 // ----------------------------------------------------------------------------
2478
2479 void wxRichTextCtrl::SetEditable(bool editable)
2480 {
2481     m_editable = editable;
2482 }
2483
2484 void wxRichTextCtrl::SetInsertionPoint(long pos)
2485 {
2486     SelectNone();
2487
2488     m_caretPosition = pos - 1;
2489
2490     PositionCaret();
2491 }
2492
2493 void wxRichTextCtrl::SetInsertionPointEnd()
2494 {
2495     long pos = GetLastPosition();
2496     SetInsertionPoint(pos);
2497 }
2498
2499 long wxRichTextCtrl::GetInsertionPoint() const
2500 {
2501     return m_caretPosition+1;
2502 }
2503
2504 wxTextPos wxRichTextCtrl::GetLastPosition() const
2505 {
2506     return GetBuffer().GetRange().GetEnd();
2507 }
2508
2509 // If the return values from and to are the same, there is no
2510 // selection.
2511 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2512 {
2513     *from = m_selectionRange.GetStart();
2514     *to = m_selectionRange.GetEnd();
2515     if ((*to) != -1 && (*to) != -2)
2516         (*to) ++;
2517 }
2518
2519 bool wxRichTextCtrl::IsEditable() const
2520 {
2521     return m_editable;
2522 }
2523
2524 // ----------------------------------------------------------------------------
2525 // selection
2526 // ----------------------------------------------------------------------------
2527
2528 void wxRichTextCtrl::SetSelection(long from, long to)
2529 {
2530     // if from and to are both -1, it means (in wxWidgets) that all text should
2531     // be selected.
2532     if ( (from == -1) && (to == -1) )
2533     {
2534         from = 0;
2535         to = GetLastPosition()+1;
2536     }
2537
2538     DoSetSelection(from, to);
2539 }
2540
2541 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2542 {
2543     if (from == to)
2544     {
2545         SelectNone();
2546     }
2547     else
2548     {
2549         wxRichTextRange oldSelection = m_selectionRange;
2550         m_selectionAnchor = from;
2551         m_selectionRange.SetRange(from, to-1);
2552         if (from > -2)
2553             m_caretPosition = from-1;
2554
2555         RefreshForSelectionChange(oldSelection, m_selectionRange);
2556         PositionCaret();
2557     }
2558 }
2559
2560 // ----------------------------------------------------------------------------
2561 // Editing
2562 // ----------------------------------------------------------------------------
2563
2564 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2565                              const wxString& value)
2566 {
2567     BeginBatchUndo(_("Replace"));
2568
2569     DeleteSelectedContent();
2570
2571     DoWriteText(value, SetValue_SelectionOnly);
2572
2573     EndBatchUndo();
2574 }
2575
2576 void wxRichTextCtrl::Remove(long from, long to)
2577 {
2578     SelectNone();
2579
2580     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to-1), this);
2581
2582     LayoutContent();
2583     if (!IsFrozen())
2584         Refresh(false);
2585 }
2586
2587 bool wxRichTextCtrl::IsModified() const
2588 {
2589     return m_buffer.IsModified();
2590 }
2591
2592 void wxRichTextCtrl::MarkDirty()
2593 {
2594     m_buffer.Modify(true);
2595 }
2596
2597 void wxRichTextCtrl::DiscardEdits()
2598 {
2599     m_caretPositionForDefaultStyle = -2;
2600     m_buffer.Modify(false);
2601     m_buffer.GetCommandProcessor()->ClearCommands();
2602 }
2603
2604 int wxRichTextCtrl::GetNumberOfLines() const
2605 {
2606     return GetBuffer().GetParagraphCount();
2607 }
2608
2609 // ----------------------------------------------------------------------------
2610 // Positions <-> coords
2611 // ----------------------------------------------------------------------------
2612
2613 long wxRichTextCtrl::XYToPosition(long x, long y) const
2614 {
2615     return GetBuffer().XYToPosition(x, y);
2616 }
2617
2618 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2619 {
2620     return GetBuffer().PositionToXY(pos, x, y);
2621 }
2622
2623 // ----------------------------------------------------------------------------
2624 //
2625 // ----------------------------------------------------------------------------
2626
2627 void wxRichTextCtrl::ShowPosition(long pos)
2628 {
2629     if (!IsPositionVisible(pos))
2630         ScrollIntoView(pos-1, WXK_DOWN);
2631 }
2632
2633 int wxRichTextCtrl::GetLineLength(long lineNo) const
2634 {
2635     return GetBuffer().GetParagraphLength(lineNo);
2636 }
2637
2638 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2639 {
2640     return GetBuffer().GetParagraphText(lineNo);
2641 }
2642
2643 // ----------------------------------------------------------------------------
2644 // Undo/redo
2645 // ----------------------------------------------------------------------------
2646
2647 void wxRichTextCtrl::Undo()
2648 {
2649     if (CanUndo())
2650     {
2651         GetCommandProcessor()->Undo();
2652     }
2653 }
2654
2655 void wxRichTextCtrl::Redo()
2656 {
2657     if (CanRedo())
2658     {
2659         GetCommandProcessor()->Redo();
2660     }
2661 }
2662
2663 bool wxRichTextCtrl::CanUndo() const
2664 {
2665     return GetCommandProcessor()->CanUndo();
2666 }
2667
2668 bool wxRichTextCtrl::CanRedo() const
2669 {
2670     return GetCommandProcessor()->CanRedo();
2671 }
2672
2673 // ----------------------------------------------------------------------------
2674 // implementation details
2675 // ----------------------------------------------------------------------------
2676
2677 void wxRichTextCtrl::Command(wxCommandEvent& event)
2678 {
2679     SetValue(event.GetString());
2680     GetEventHandler()->ProcessEvent(event);
2681 }
2682
2683 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2684 {
2685     // By default, load the first file into the text window.
2686     if (event.GetNumberOfFiles() > 0)
2687     {
2688         LoadFile(event.GetFiles()[0]);
2689     }
2690 }
2691
2692 wxSize wxRichTextCtrl::DoGetBestSize() const
2693 {
2694     return wxSize(10, 10);
2695 }
2696
2697 // ----------------------------------------------------------------------------
2698 // standard handlers for standard edit menu events
2699 // ----------------------------------------------------------------------------
2700
2701 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2702 {
2703     Cut();
2704 }
2705
2706 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2707 {
2708     DeleteSelection();
2709 }
2710
2711 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2712 {
2713     Copy();
2714 }
2715
2716 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2717 {
2718     Paste();
2719 }
2720
2721 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2722 {
2723     Undo();
2724 }
2725
2726 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2727 {
2728     Redo();
2729 }
2730
2731 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2732 {
2733     event.Enable( CanCut() );
2734 }
2735
2736 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2737 {
2738     event.Enable( CanCopy() );
2739 }
2740
2741 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2742 {
2743     event.Enable( CanDeleteSelection() );
2744 }
2745
2746 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2747 {
2748     event.Enable( CanPaste() );
2749 }
2750
2751 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2752 {
2753     event.Enable( CanUndo() );
2754     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2755 }
2756
2757 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2758 {
2759     event.Enable( CanRedo() );
2760     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2761 }
2762
2763 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2764 {
2765     SelectAll();
2766 }
2767
2768 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2769 {
2770     event.Enable(GetLastPosition() > 0);
2771 }
2772
2773 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2774 {
2775     if (event.GetEventObject() != this)
2776     {
2777         event.Skip();
2778         return;
2779     }
2780
2781     if (!m_contextMenu)
2782     {
2783         m_contextMenu = new wxMenu;
2784         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2785         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2786         m_contextMenu->AppendSeparator();
2787         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2788         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2789         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2790         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2791         m_contextMenu->AppendSeparator();
2792         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2793     }
2794     PopupMenu(m_contextMenu);
2795     return;
2796 }
2797
2798 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2799 {
2800     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttr(style));
2801 }
2802
2803 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxTextAttr& style)
2804 {
2805     return GetBuffer().SetStyle(range.ToInternal(), style);
2806 }
2807
2808 // extended style setting operation with flags including:
2809 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2810 // see richtextbuffer.h for more details.
2811
2812 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttr& style, int flags)
2813 {
2814     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2815 }
2816
2817 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2818 {
2819     return GetBuffer().SetDefaultStyle(wxTextAttr(style));
2820 }
2821
2822 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2823 {
2824     return GetBuffer().GetDefaultStyle();
2825 }
2826
2827 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2828 {
2829     return GetBuffer().GetStyle(position, style);
2830 }
2831
2832 // get the common set of styles for the range
2833 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttr& style)
2834 {
2835     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2836 }
2837
2838 /// Get the content (uncombined) attributes for this position.
2839 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2840 {
2841     return GetBuffer().GetUncombinedStyle(position, style);
2842 }
2843
2844 /// Set font, and also the buffer attributes
2845 bool wxRichTextCtrl::SetFont(const wxFont& font)
2846 {
2847     wxControl::SetFont(font);
2848
2849     wxTextAttr attr = GetBuffer().GetAttributes();
2850     attr.SetFont(font);
2851     GetBuffer().SetBasicStyle(attr);
2852
2853     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2854     Refresh(false);
2855
2856     return true;
2857 }
2858
2859 /// Transform logical to physical
2860 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2861 {
2862     wxPoint pt;
2863     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2864
2865     return pt;
2866 }
2867
2868 /// Transform physical to logical
2869 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2870 {
2871     wxPoint pt;
2872     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2873
2874     return pt;
2875 }
2876
2877 /// Position the caret
2878 void wxRichTextCtrl::PositionCaret()
2879 {
2880     if (!GetCaret())
2881         return;
2882
2883     //wxLogDebug(wxT("PositionCaret"));
2884
2885     wxRect caretRect;
2886     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2887     {
2888         wxPoint newPt = caretRect.GetPosition();
2889         wxSize newSz = caretRect.GetSize();
2890         wxPoint pt = GetPhysicalPoint(newPt);
2891         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
2892         {
2893             GetCaret()->Hide();
2894             if (GetCaret()->GetSize() != newSz)
2895                 GetCaret()->SetSize(newSz);
2896             GetCaret()->Move(pt);
2897             GetCaret()->Show();
2898         }
2899     }
2900 }
2901
2902 /// Get the caret height and position for the given character position
2903 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2904 {
2905     wxClientDC dc(this);
2906     dc.SetFont(GetFont());
2907
2908     PrepareDC(dc);
2909
2910     wxPoint pt;
2911     int height = 0;
2912
2913     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2914     {
2915         // Caret height can't be zero
2916         if (height == 0)
2917             height = dc.GetCharHeight();
2918
2919         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2920         return true;
2921     }
2922
2923     return false;
2924 }
2925
2926 /// Gets the line for the visible caret position. If the caret is
2927 /// shown at the very end of the line, it means the next character is actually
2928 /// on the following line. So let's get the line we're expecting to find
2929 /// if this is the case.
2930 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2931 {
2932     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2933     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2934     if (line)
2935     {
2936         wxRichTextRange lineRange = line->GetAbsoluteRange();
2937         if (caretPosition == lineRange.GetStart()-1 &&
2938             (para->GetRange().GetStart() != lineRange.GetStart()))
2939         {
2940             if (!m_caretAtLineStart)
2941                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2942         }
2943     }
2944     return line;
2945 }
2946
2947
2948 /// Move the caret to the given character position
2949 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2950 {
2951     if (GetBuffer().GetDirty())
2952         LayoutContent();
2953
2954     if (pos <= GetBuffer().GetRange().GetEnd())
2955     {
2956         SetCaretPosition(pos, showAtLineStart);
2957
2958         PositionCaret();
2959
2960         return true;
2961     }
2962     else
2963         return false;
2964 }
2965
2966 /// Layout the buffer: which we must do before certain operations, such as
2967 /// setting the caret position.
2968 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2969 {
2970     if (GetBuffer().GetDirty() || onlyVisibleRect)
2971     {
2972         wxRect availableSpace(GetClientSize());
2973         if (availableSpace.width == 0)
2974             availableSpace.width = 10;
2975         if (availableSpace.height == 0)
2976             availableSpace.height = 10;
2977
2978         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2979         if (onlyVisibleRect)
2980         {
2981             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2982             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2983         }
2984
2985         wxClientDC dc(this);
2986         dc.SetFont(GetFont());
2987
2988         PrepareDC(dc);
2989
2990         GetBuffer().Defragment();
2991         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2992         GetBuffer().Layout(dc, availableSpace, flags);
2993         GetBuffer().SetDirty(false);
2994
2995         if (!IsFrozen())
2996             SetupScrollbars();
2997     }
2998
2999     return true;
3000 }
3001
3002 /// Is all of the selection bold?
3003 bool wxRichTextCtrl::IsSelectionBold()
3004 {
3005     if (HasSelection())
3006     {
3007         wxTextAttr attr;
3008         wxRichTextRange range = GetSelectionRange();
3009         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3010         attr.SetFontWeight(wxBOLD);
3011
3012         return HasCharacterAttributes(range, attr);
3013     }
3014     else
3015     {
3016         // If no selection, then we need to combine current style with default style
3017         // to see what the effect would be if we started typing.
3018         wxTextAttr attr;
3019         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3020
3021         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3022         if (GetStyle(pos, attr))
3023         {
3024             if (IsDefaultStyleShowing())
3025                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3026             return attr.GetFontWeight() == wxBOLD;
3027         }
3028     }
3029     return false;
3030 }
3031
3032 /// Is all of the selection italics?
3033 bool wxRichTextCtrl::IsSelectionItalics()
3034 {
3035     if (HasSelection())
3036     {
3037         wxRichTextRange range = GetSelectionRange();
3038         wxTextAttr attr;
3039         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3040         attr.SetFontStyle(wxITALIC);
3041
3042         return HasCharacterAttributes(range, attr);
3043     }
3044     else
3045     {
3046         // If no selection, then we need to combine current style with default style
3047         // to see what the effect would be if we started typing.
3048         wxTextAttr attr;
3049         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3050
3051         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3052         if (GetStyle(pos, attr))
3053         {
3054             if (IsDefaultStyleShowing())
3055                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3056             return attr.GetFontStyle() == wxITALIC;
3057         }
3058     }
3059     return false;
3060 }
3061
3062 /// Is all of the selection underlined?
3063 bool wxRichTextCtrl::IsSelectionUnderlined()
3064 {
3065     if (HasSelection())
3066     {
3067         wxRichTextRange range = GetSelectionRange();
3068         wxTextAttr attr;
3069         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3070         attr.SetFontUnderlined(true);
3071
3072         return HasCharacterAttributes(range, attr);
3073     }
3074     else
3075     {
3076         // If no selection, then we need to combine current style with default style
3077         // to see what the effect would be if we started typing.
3078         wxTextAttr attr;
3079         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3080         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3081
3082         if (GetStyle(pos, attr))
3083         {
3084             if (IsDefaultStyleShowing())
3085                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3086             return attr.GetFontUnderlined();
3087         }
3088     }
3089     return false;
3090 }
3091
3092 /// Apply bold to the selection
3093 bool wxRichTextCtrl::ApplyBoldToSelection()
3094 {
3095     wxTextAttr attr;
3096     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3097     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
3098
3099     if (HasSelection())
3100         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3101     else
3102     {
3103         wxRichTextAttr current = GetDefaultStyleEx();
3104         current.Apply(attr);
3105         SetAndShowDefaultStyle(current);
3106     }
3107     return true;
3108 }
3109
3110 /// Apply italic to the selection
3111 bool wxRichTextCtrl::ApplyItalicToSelection()
3112 {
3113     wxTextAttr attr;
3114     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3115     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
3116
3117     if (HasSelection())
3118         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3119     else
3120     {
3121         wxRichTextAttr current = GetDefaultStyleEx();
3122         current.Apply(attr);
3123         SetAndShowDefaultStyle(current);
3124     }
3125     return true;
3126 }
3127
3128 /// Apply underline to the selection
3129 bool wxRichTextCtrl::ApplyUnderlineToSelection()
3130 {
3131     wxTextAttr attr;
3132     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3133     attr.SetFontUnderlined(!IsSelectionUnderlined());
3134
3135     if (HasSelection())
3136         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3137     else
3138     {
3139         wxRichTextAttr current = GetDefaultStyleEx();
3140         current.Apply(attr);
3141         SetAndShowDefaultStyle(current);
3142     }
3143     return true;
3144 }
3145
3146 /// Is all of the selection aligned according to the specified flag?
3147 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
3148 {
3149     wxRichTextRange range;
3150     if (HasSelection())
3151         range = GetSelectionRange();
3152     else
3153         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
3154
3155     wxTextAttr attr;
3156     attr.SetAlignment(alignment);
3157
3158     return HasParagraphAttributes(range, attr);
3159 }
3160
3161 /// Apply alignment to the selection
3162 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
3163 {
3164     wxTextAttr attr;
3165     attr.SetAlignment(alignment);
3166     if (HasSelection())
3167         return SetStyle(GetSelectionRange(), attr);
3168     else
3169     {
3170         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
3171         if (para)
3172             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
3173     }
3174     return true;
3175 }
3176
3177 /// Apply a named style to the selection
3178 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
3179 {
3180     // Flags are defined within each definition, so only certain
3181     // attributes are applied.
3182     wxTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
3183
3184     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_RESET;
3185
3186     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
3187     {
3188         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3189
3190         wxRichTextRange range;
3191
3192         if (HasSelection())
3193             range = GetSelectionRange();
3194         else
3195         {
3196             long pos = GetAdjustedCaretPosition(GetCaretPosition());
3197             range = wxRichTextRange(pos, pos+1);
3198         }
3199
3200         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
3201     }
3202
3203     // Make sure the attr has the style name
3204     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
3205     {
3206         attr.SetParagraphStyleName(def->GetName());
3207
3208         // If applying a paragraph style, we only want the paragraph nodes to adopt these
3209         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
3210         // to change its style independently.
3211         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3212     }
3213     else
3214         attr.SetCharacterStyleName(def->GetName());
3215
3216     if (HasSelection())
3217         return SetStyleEx(GetSelectionRange(), attr, flags);
3218     else
3219     {
3220         wxRichTextAttr current = GetDefaultStyleEx();
3221         current.Apply(attr);
3222         SetAndShowDefaultStyle(current);
3223         return true;
3224     }
3225 }
3226
3227 /// Apply the style sheet to the buffer, for example if the styles have changed.
3228 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
3229 {
3230     if (!styleSheet)
3231         styleSheet = GetBuffer().GetStyleSheet();
3232     if (!styleSheet)
3233         return false;
3234
3235     if (GetBuffer().ApplyStyleSheet(styleSheet))
3236     {
3237         GetBuffer().Invalidate(wxRICHTEXT_ALL);
3238         Refresh(false);
3239         return true;
3240     }
3241     else
3242         return false;
3243 }
3244
3245 /// Sets the default style to the style under the cursor
3246 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3247 {
3248     wxTextAttr attr;
3249     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3250
3251     // If at the start of a paragraph, use the next position.
3252     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3253
3254     if (GetUncombinedStyle(pos, attr))
3255     {
3256         SetDefaultStyle(attr);
3257         return true;
3258     }
3259
3260     return false;
3261 }
3262
3263 /// Returns the first visible position in the current view
3264 long wxRichTextCtrl::GetFirstVisiblePosition() const
3265 {
3266     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3267     if (line)
3268         return line->GetAbsoluteRange().GetStart();
3269     else
3270         return 0;
3271 }
3272
3273 /// Get the first visible point in the window
3274 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3275 {
3276     int ppuX, ppuY;
3277     int startXUnits, startYUnits;
3278
3279     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3280     GetViewStart(& startXUnits, & startYUnits);
3281
3282     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3283 }
3284
3285 /// The adjusted caret position is the character position adjusted to take
3286 /// into account whether we're at the start of a paragraph, in which case
3287 /// style information should be taken from the next position, not current one.
3288 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3289 {
3290     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3291
3292     if (para && (caretPos+1 == para->GetRange().GetStart()))
3293         caretPos ++;
3294     return caretPos;
3295 }
3296
3297 /// Get/set the selection range in character positions. -1, -1 means no selection.
3298 /// The range is in API convention, i.e. a single character selection is denoted
3299 /// by (n, n+1)
3300 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3301 {
3302     wxRichTextRange range = GetInternalSelectionRange();
3303     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3304         range.SetEnd(range.GetEnd() + 1);
3305     return range;
3306 }
3307
3308 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3309 {
3310     wxRichTextRange range1(range);
3311     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3312         range1.SetEnd(range1.GetEnd() - 1);
3313
3314     wxASSERT( range1.GetStart() > range1.GetEnd() );
3315
3316     SetInternalSelectionRange(range1);
3317 }
3318
3319 /// Set list style
3320 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3321 {
3322     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3323 }
3324
3325 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3326 {
3327     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3328 }
3329
3330 /// Clear list for given range
3331 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3332 {
3333     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3334 }
3335
3336 /// Number/renumber any list elements in the given range
3337 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3338 {
3339     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3340 }
3341
3342 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3343 {
3344     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3345 }
3346
3347 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3348 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3349 {
3350     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3351 }
3352
3353 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3354 {
3355     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3356 }
3357
3358 /// Deletes the content in the given range
3359 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3360 {
3361     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3362 }
3363
3364 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3365 {
3366     if (sm_availableFontNames.GetCount() == 0)
3367     {
3368         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3369         sm_availableFontNames.Sort();
3370     }
3371     return sm_availableFontNames;
3372 }
3373
3374 void wxRichTextCtrl::ClearAvailableFontNames()
3375 {
3376     sm_availableFontNames.Clear();
3377 }
3378
3379 void wxRichTextCtrl::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
3380 {
3381     //wxLogDebug(wxT("wxRichTextCtrl::OnSysColourChanged"));
3382
3383     wxTextAttrEx basicStyle = GetBasicStyle();
3384     basicStyle.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
3385     SetBasicStyle(basicStyle);
3386     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
3387
3388     Refresh();
3389 }
3390
3391 // Refresh the area affected by a selection change
3392 bool wxRichTextCtrl::RefreshForSelectionChange(const wxRichTextRange& oldSelection, const wxRichTextRange& newSelection)
3393 {
3394     // Calculate the refresh rectangle - just the affected lines
3395     long firstPos, lastPos;
3396     if (oldSelection.GetStart() == -2 && newSelection.GetStart() != -2)
3397     {
3398         firstPos = newSelection.GetStart();
3399         lastPos = newSelection.GetEnd();
3400     }
3401     else if (oldSelection.GetStart() != -2 && newSelection.GetStart() == -2)
3402     {
3403         firstPos = oldSelection.GetStart();
3404         lastPos = oldSelection.GetEnd();
3405     }
3406     else if (oldSelection.GetStart() == -2 && newSelection.GetStart() == -2)
3407     {
3408         return false;
3409     }
3410     else
3411     {
3412         firstPos = wxMin(oldSelection.GetStart(), newSelection.GetStart());
3413         lastPos = wxMax(oldSelection.GetEnd(), newSelection.GetEnd());
3414     }
3415
3416     wxRichTextLine* firstLine = GetBuffer().GetLineAtPosition(firstPos);
3417     wxRichTextLine* lastLine = GetBuffer().GetLineAtPosition(lastPos);
3418
3419     if (firstLine && lastLine)
3420     {
3421         wxSize clientSize = GetClientSize();
3422         wxPoint pt1 = GetPhysicalPoint(firstLine->GetAbsolutePosition());
3423         wxPoint pt2 = GetPhysicalPoint(lastLine->GetAbsolutePosition()) + wxPoint(0, lastLine->GetSize().y);
3424
3425         pt1.x = 0;
3426         pt1.y = wxMax(0, pt1.y);
3427         pt2.x = 0;
3428         pt2.y = wxMin(clientSize.y, pt2.y);
3429
3430         wxRect rect(pt1, wxSize(clientSize.x, pt2.y - pt1.y));
3431         RefreshRect(rect, false);
3432     }
3433     else
3434         Refresh(false);
3435
3436     return true;
3437 }
3438
3439 #if wxRICHTEXT_USE_OWN_CARET
3440
3441 // ----------------------------------------------------------------------------
3442 // initialization and destruction
3443 // ----------------------------------------------------------------------------
3444
3445 void wxRichTextCaret::Init()
3446 {
3447     m_hasFocus = true;
3448
3449     m_xOld =
3450     m_yOld = -1;
3451     m_richTextCtrl = NULL;
3452     m_needsUpdate = false;
3453 }
3454
3455 wxRichTextCaret::~wxRichTextCaret()
3456 {
3457 }
3458
3459 // ----------------------------------------------------------------------------
3460 // showing/hiding/moving the caret (base class interface)
3461 // ----------------------------------------------------------------------------
3462
3463 void wxRichTextCaret::DoShow()
3464 {
3465     Refresh();
3466 }
3467
3468 void wxRichTextCaret::DoHide()
3469 {
3470     Refresh();
3471 }
3472
3473 void wxRichTextCaret::DoMove()
3474 {
3475     if (IsVisible())
3476     {
3477         Refresh();
3478
3479         if (m_xOld != -1 && m_yOld != -1)
3480         {
3481             if (m_richTextCtrl)
3482             {
3483                 wxRect rect(GetPosition(), GetSize());
3484                 m_richTextCtrl->RefreshRect(rect, false);
3485             }
3486         }
3487     }
3488
3489     m_xOld = m_x;
3490     m_yOld = m_y;
3491 }
3492
3493 void wxRichTextCaret::DoSize()
3494 {
3495     int countVisible = m_countVisible;
3496     if (countVisible > 0)
3497     {
3498         m_countVisible = 0;
3499         DoHide();
3500     }
3501
3502     if (countVisible > 0)
3503     {
3504         m_countVisible = countVisible;
3505         DoShow();
3506     }
3507 }
3508
3509 // ----------------------------------------------------------------------------
3510 // handling the focus
3511 // ----------------------------------------------------------------------------
3512
3513 void wxRichTextCaret::OnSetFocus()
3514 {
3515     m_hasFocus = true;
3516
3517     if ( IsVisible() )
3518         Refresh();
3519 }
3520
3521 void wxRichTextCaret::OnKillFocus()
3522 {
3523     m_hasFocus = false;
3524 }
3525
3526 // ----------------------------------------------------------------------------
3527 // drawing the caret
3528 // ----------------------------------------------------------------------------
3529
3530 void wxRichTextCaret::Refresh()
3531 {
3532     if (m_richTextCtrl)
3533     {
3534         wxRect rect(GetPosition(), GetSize());
3535         m_richTextCtrl->RefreshRect(rect, false);
3536     }
3537 }
3538
3539 void wxRichTextCaret::DoDraw(wxDC *dc)
3540 {
3541     dc->SetPen( *wxBLACK_PEN );
3542
3543     dc->SetBrush(*(m_hasFocus ? wxBLACK_BRUSH : wxTRANSPARENT_BRUSH));
3544     dc->SetPen(*wxBLACK_PEN);
3545
3546     // VZ: unfortunately, the rectangle comes out a pixel smaller when this is
3547     //     done under wxGTK - no idea why
3548     //dc->SetLogicalFunction(wxINVERT);
3549
3550     wxPoint pt(m_x, m_y);
3551
3552     if (m_richTextCtrl)
3553     {
3554         pt = m_richTextCtrl->GetLogicalPoint(pt);
3555     }
3556     dc->DrawRectangle(pt.x, pt.y, m_width, m_height);
3557 }
3558 #endif
3559     // wxRICHTEXT_USE_OWN_CARET
3560
3561 #endif
3562     // wxUSE_RICHTEXT