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