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 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_LEFT_CLICK, wxRichTextEvent )
  42 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK, wxRichTextEvent )
  43 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK, wxRichTextEvent )
  44 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK, wxRichTextEvent )
  45 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_RETURN, wxRichTextEvent )
  46 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CHARACTER, wxRichTextEvent )
  47 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_DELETE, wxRichTextEvent )
  48
  49 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING, wxRichTextEvent )
  50 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED, wxRichTextEvent )
  51 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING, wxRichTextEvent )
  52 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED, wxRichTextEvent )
  53
  54 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED, wxRichTextEvent )
  55 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED, wxRichTextEvent )
  56 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED, wxRichTextEvent )
  57 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED, wxRichTextEvent )
  58 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_BUFFER_RESET, wxRichTextEvent )
  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_DYNAMIC_CLASS( wxRichTextCtrl, wxControl )
 124
 125 IMPLEMENT_DYNAMIC_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     // No physical scrolling, so we can preserve margins
 210     EnableScrolling(false, false);
 211
 212     if (style & wxTE_READONLY)
 213         SetEditable(false);
 214
 215     // The base attributes must all have default values
 216     wxTextAttr attributes;
 217     attributes.SetFont(GetFont());
 218     attributes.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
 219     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 220     attributes.SetLineSpacing(10);
 221     attributes.SetParagraphSpacingAfter(10);
 222     attributes.SetParagraphSpacingBefore(0);
 223
 224     SetBasicStyle(attributes);
 225
 226     // The default attributes will be merged with base attributes, so
 227     // can be empty to begin with
 228     wxTextAttr defaultAttributes;
 229     SetDefaultStyle(defaultAttributes);
 230
 231     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 232     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 233
 234     GetBuffer().Reset();
 235     GetBuffer().SetRichTextCtrl(this);
 236
 237 #if wxRICHTEXT_USE_OWN_CARET
 238     SetCaret(new wxRichTextCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 239 #else
 240     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 241 #endif
 242
 243     // Tell the sizers to use the given or best size
 244     SetInitialSize(size);
 245
 246 #if wxRICHTEXT_BUFFERED_PAINTING
 247     // Create a buffer
 248     RecreateBuffer(size);
 249 #endif
 250
 251     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 252     m_urlCursor = wxCursor(wxCURSOR_HAND);
 253
 254     SetCursor(m_textCursor);
 255
 256     if (!value.IsEmpty())
 257         SetValue(value);
 258
 259     GetBuffer().AddEventHandler(this);
 260
 261     // Accelerators
 262     wxAcceleratorEntry entries[6];
 263
 264     entries[0].Set(wxACCEL_CMD,   (int) 'C',       wxID_COPY);
 265     entries[1].Set(wxACCEL_CMD,   (int) 'X',       wxID_CUT);
 266     entries[2].Set(wxACCEL_CMD,   (int) 'V',       wxID_PASTE);
 267     entries[3].Set(wxACCEL_CMD,   (int) 'A',       wxID_SELECTALL);
 268     entries[4].Set(wxACCEL_CMD,   (int) 'Z',       wxID_UNDO);
 269     entries[5].Set(wxACCEL_CMD,   (int) 'Y',       wxID_REDO);
 270
 271     wxAcceleratorTable accel(6, entries);
 272     SetAcceleratorTable(accel);
 273
 274     return true;
 275 }
 276
 277 wxRichTextCtrl::~wxRichTextCtrl()
 278 {
 279     GetBuffer().RemoveEventHandler(this);
 280
 281     delete m_contextMenu;
 282 }
 283
 284 /// Member initialisation
 285 void wxRichTextCtrl::Init()
 286 {
 287     m_contextMenu = NULL;
 288     m_caret = NULL;
 289     m_caretPosition = -1;
 290     m_selectionRange.SetRange(-2, -2);
 291     m_selectionAnchor = -2;
 292     m_editable = true;
 293     m_caretAtLineStart = false;
 294     m_dragging = false;
 295     m_fullLayoutRequired = false;
 296     m_fullLayoutTime = 0;
 297     m_fullLayoutSavedPosition = 0;
 298     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 299     m_caretPositionForDefaultStyle = -2;
 300 }
 301
 302 void wxRichTextCtrl::DoThaw()
 303 {
 304     if (GetBuffer().GetDirty())
 305         LayoutContent();
 306     else
 307         SetupScrollbars();
 308
 309     wxWindow::DoThaw();
 310 }
 311
 312 /// Clear all text
 313 void wxRichTextCtrl::Clear()
 314 {
 315     m_buffer.ResetAndClearCommands();
 316     m_buffer.SetDirty(true);
 317     m_caretPosition = -1;
 318     m_caretPositionForDefaultStyle = -2;
 319     m_caretAtLineStart = false;
 320     m_selectionRange.SetRange(-2, -2);
 321
 322     Scroll(0,0);
 323
 324     if (!IsFrozen())
 325     {
 326         LayoutContent();
 327         Refresh(false);
 328     }
 329
 330     wxTextCtrl::SendTextUpdatedEvent(this);
 331 }
 332
 333 /// Painting
 334 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 335 {
 336 #if !wxRICHTEXT_USE_OWN_CARET
 337     if (GetCaret() && !IsFrozen())
 338         GetCaret()->Hide();
 339 #endif
 340
 341     {
 342 #if wxRICHTEXT_BUFFERED_PAINTING
 343         wxBufferedPaintDC dc(this, m_bufferBitmap);
 344 #else
 345         wxPaintDC dc(this);
 346 #endif
 347
 348         if (IsFrozen())
 349             return;
 350
 351         PrepareDC(dc);
 352
 353         dc.SetFont(GetFont());
 354
 355         // Paint the background
 356         PaintBackground(dc);
 357
 358         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 359
 360         wxRect drawingArea(GetUpdateRegion().GetBox());
 361         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 362
 363         wxRect availableSpace(GetClientSize());
 364         if (GetBuffer().GetDirty())
 365         {
 366             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 367             GetBuffer().SetDirty(false);
 368             SetupScrollbars();
 369         }
 370
 371         wxRect clipRect(availableSpace);
 372         clipRect.x += GetBuffer().GetLeftMargin();
 373         clipRect.y += GetBuffer().GetTopMargin();
 374         clipRect.width -= (GetBuffer().GetLeftMargin() + GetBuffer().GetRightMargin());
 375         clipRect.height -= (GetBuffer().GetTopMargin() + GetBuffer().GetBottomMargin());
 376         clipRect.SetPosition(GetLogicalPoint(clipRect.GetPosition()));
 377         dc.SetClippingRegion(clipRect);
 378
 379         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 380
 381         dc.DestroyClippingRegion();
 382
 383 #if wxRICHTEXT_USE_OWN_CARET
 384         if (GetCaret()->IsVisible())
 385         {
 386             ((wxRichTextCaret*) GetCaret())->DoDraw(& dc);
 387         }
 388 #endif
 389     }
 390
 391 #if !wxRICHTEXT_USE_OWN_CARET
 392     if (GetCaret())
 393         GetCaret()->Show();
 394     PositionCaret();
 395 #endif
 396 }
 397
 398 // Empty implementation, to prevent flicker
 399 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 400 {
 401 }
 402
 403 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 404 {
 405     if (GetCaret())
 406     {
 407 #if !wxRICHTEXT_USE_OWN_CARET
 408         PositionCaret();
 409 #endif
 410         GetCaret()->Show();
 411     }
 412
 413 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 414     // Work around dropouts when control is focused
 415     if (!IsFrozen())
 416     {
 417         Refresh(false);
 418     }
 419 #endif
 420 }
 421
 422 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 423 {
 424     if (GetCaret())
 425         GetCaret()->Hide();
 426
 427 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 428     // Work around dropouts when control is focused
 429     if (!IsFrozen())
 430     {
 431         Refresh(false);
 432     }
 433 #endif
 434 }
 435
 436 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 437 {
 438     m_dragging = false;
 439 }
 440
 441 /// Left-click
 442 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 443 {
 444     SetFocus();
 445
 446     wxClientDC dc(this);
 447     PrepareDC(dc);
 448     dc.SetFont(GetFont());
 449
 450     long position = 0;
 451     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 452
 453     if (hit != wxRICHTEXT_HITTEST_NONE)
 454     {
 455         m_dragStart = event.GetLogicalPosition(dc);
 456         m_dragging = true;
 457         CaptureMouse();
 458
 459         bool caretAtLineStart = false;
 460
 461         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 462         {
 463             // If we're at the start of a line (but not first in para)
 464             // then we should keep the caret showing at the start of the line
 465             // by showing the m_caretAtLineStart flag.
 466             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 467             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 468
 469             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 470                 caretAtLineStart = true;
 471             position --;
 472         }
 473
 474         long oldCaretPos = m_caretPosition;
 475
 476         MoveCaret(position, caretAtLineStart);
 477         SetDefaultStyleToCursorStyle();
 478
 479         if (event.ShiftDown())
 480         {
 481             if (m_selectionRange.GetStart() == -2)
 482                 ExtendSelection(oldCaretPos, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 483             else
 484                 ExtendSelection(m_caretPosition, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 485         }
 486         else
 487             SelectNone();
 488     }
 489
 490     event.Skip();
 491 }
 492
 493 /// Left-up
 494 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 495 {
 496     if (m_dragging)
 497     {
 498         m_dragging = false;
 499         if (GetCapture() == this)
 500             ReleaseMouse();
 501
 502         // See if we clicked on a URL
 503         wxClientDC dc(this);
 504         PrepareDC(dc);
 505         dc.SetFont(GetFont());
 506
 507         long position = 0;
 508         wxPoint logicalPt = event.GetLogicalPosition(dc);
 509         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 510
 511         if ((hit != wxRICHTEXT_HITTEST_NONE) && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 512         {
 513             wxRichTextEvent cmdEvent(
 514                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 515                 GetId());
 516             cmdEvent.SetEventObject(this);
 517             cmdEvent.SetPosition(m_caretPosition+1);
 518
 519             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 520             {
 521                 wxTextAttr attr;
 522                 if (GetStyle(position, attr))
 523                 {
 524                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 525                     {
 526                         wxString urlTarget = attr.GetURL();
 527                         if (!urlTarget.IsEmpty())
 528                         {
 529                             wxMouseEvent mouseEvent(event);
 530
 531                             long startPos = 0, endPos = 0;
 532                             wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 533                             if (obj)
 534                             {
 535                                 startPos = obj->GetRange().GetStart();
 536                                 endPos = obj->GetRange().GetEnd();
 537                             }
 538
 539                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 540                             InitCommandEvent(urlEvent);
 541
 542                             urlEvent.SetString(urlTarget);
 543
 544                             GetEventHandler()->ProcessEvent(urlEvent);
 545                         }
 546                     }
 547                 }
 548             }
 549         }
 550     }
 551 }
 552
 553 /// Left-click
 554 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 555 {
 556     wxClientDC dc(this);
 557     PrepareDC(dc);
 558     dc.SetFont(GetFont());
 559
 560     long position = 0;
 561     wxPoint logicalPt = event.GetLogicalPosition(dc);
 562     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 563
 564     // See if we need to change the cursor
 565
 566     {
 567         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 568         {
 569             wxTextAttr attr;
 570             if (GetStyle(position, attr))
 571             {
 572                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 573                 {
 574                     SetCursor(m_urlCursor);
 575                 }
 576                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 577                 {
 578                     SetCursor(m_textCursor);
 579                 }
 580             }
 581         }
 582         else
 583             SetCursor(m_textCursor);
 584     }
 585
 586     if (!event.Dragging())
 587     {
 588         event.Skip();
 589         return;
 590     }
 591
 592     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 593     {
 594         // TODO: test closeness
 595
 596         bool caretAtLineStart = false;
 597
 598         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 599         {
 600             // If we're at the start of a line (but not first in para)
 601             // then we should keep the caret showing at the start of the line
 602             // by showing the m_caretAtLineStart flag.
 603             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 604             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 605
 606             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 607                 caretAtLineStart = true;
 608             position --;
 609         }
 610
 611         if (m_caretPosition != position)
 612         {
 613             ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 614
 615             MoveCaret(position, caretAtLineStart);
 616             SetDefaultStyleToCursorStyle();
 617         }
 618     }
 619 }
 620
 621 /// Right-click
 622 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 623 {
 624     SetFocus();
 625
 626     wxRichTextEvent cmdEvent(
 627         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 628         GetId());
 629     cmdEvent.SetEventObject(this);
 630     cmdEvent.SetPosition(m_caretPosition+1);
 631
 632     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 633         event.Skip();
 634 }
 635
 636 /// Left-double-click
 637 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 638 {
 639     wxRichTextEvent cmdEvent(
 640         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
 641         GetId());
 642     cmdEvent.SetEventObject(this);
 643     cmdEvent.SetPosition(m_caretPosition+1);
 644
 645     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 646     {
 647         SelectWord(GetCaretPosition()+1);
 648     }
 649 }
 650
 651 /// Middle-click
 652 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 653 {
 654     wxRichTextEvent cmdEvent(
 655         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
 656         GetId());
 657     cmdEvent.SetEventObject(this);
 658     cmdEvent.SetPosition(m_caretPosition+1);
 659
 660     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 661         event.Skip();
 662 }
 663
 664 /// Key press
 665 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 666 {
 667     int flags = 0;
 668     if (event.CmdDown())
 669         flags |= wxRICHTEXT_CTRL_DOWN;
 670     if (event.ShiftDown())
 671         flags |= wxRICHTEXT_SHIFT_DOWN;
 672     if (event.AltDown())
 673         flags |= wxRICHTEXT_ALT_DOWN;
 674
 675     if (event.GetEventType() == wxEVT_KEY_DOWN)
 676     {
 677         if (event.GetKeyCode() == WXK_LEFT ||
 678             event.GetKeyCode() == WXK_RIGHT ||
 679             event.GetKeyCode() == WXK_UP ||
 680             event.GetKeyCode() == WXK_DOWN ||
 681             event.GetKeyCode() == WXK_HOME ||
 682             event.GetKeyCode() == WXK_PAGEUP ||
 683             event.GetKeyCode() == WXK_PAGEDOWN ||
 684             event.GetKeyCode() == WXK_END ||
 685
 686             event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 687             event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 688             event.GetKeyCode() == WXK_NUMPAD_UP ||
 689             event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 690             event.GetKeyCode() == WXK_NUMPAD_HOME ||
 691             event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 692             event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 693             event.GetKeyCode() == WXK_NUMPAD_END)
 694         {
 695             KeyboardNavigate(event.GetKeyCode(), flags);
 696             return;
 697         }
 698
 699         long keycode = event.GetKeyCode();
 700         switch ( keycode )
 701         {
 702             case WXK_ESCAPE:
 703             case WXK_START:
 704             case WXK_LBUTTON:
 705             case WXK_RBUTTON:
 706             case WXK_CANCEL:
 707             case WXK_MBUTTON:
 708             case WXK_CLEAR:
 709             case WXK_SHIFT:
 710             case WXK_ALT:
 711             case WXK_CONTROL:
 712             case WXK_MENU:
 713             case WXK_PAUSE:
 714             case WXK_CAPITAL:
 715             case WXK_END:
 716             case WXK_HOME:
 717             case WXK_LEFT:
 718             case WXK_UP:
 719             case WXK_RIGHT:
 720             case WXK_DOWN:
 721             case WXK_SELECT:
 722             case WXK_PRINT:
 723             case WXK_EXECUTE:
 724             case WXK_SNAPSHOT:
 725             case WXK_INSERT:
 726             case WXK_HELP:
 727             case WXK_F1:
 728             case WXK_F2:
 729             case WXK_F3:
 730             case WXK_F4:
 731             case WXK_F5:
 732             case WXK_F6:
 733             case WXK_F7:
 734             case WXK_F8:
 735             case WXK_F9:
 736             case WXK_F10:
 737             case WXK_F11:
 738             case WXK_F12:
 739             case WXK_F13:
 740             case WXK_F14:
 741             case WXK_F15:
 742             case WXK_F16:
 743             case WXK_F17:
 744             case WXK_F18:
 745             case WXK_F19:
 746             case WXK_F20:
 747             case WXK_F21:
 748             case WXK_F22:
 749             case WXK_F23:
 750             case WXK_F24:
 751             case WXK_NUMLOCK:
 752             case WXK_SCROLL:
 753             case WXK_PAGEUP:
 754             case WXK_PAGEDOWN:
 755             case WXK_NUMPAD_F1:
 756             case WXK_NUMPAD_F2:
 757             case WXK_NUMPAD_F3:
 758             case WXK_NUMPAD_F4:
 759             case WXK_NUMPAD_HOME:
 760             case WXK_NUMPAD_LEFT:
 761             case WXK_NUMPAD_UP:
 762             case WXK_NUMPAD_RIGHT:
 763             case WXK_NUMPAD_DOWN:
 764             case WXK_NUMPAD_PAGEUP:
 765             case WXK_NUMPAD_PAGEDOWN:
 766             case WXK_NUMPAD_END:
 767             case WXK_NUMPAD_BEGIN:
 768             case WXK_NUMPAD_INSERT:
 769             case WXK_NUMPAD_DELETE:
 770             case WXK_WINDOWS_LEFT:
 771             {
 772                 return;
 773             }
 774             default:
 775             {
 776             }
 777         }
 778
 779         // Must process this before translation, otherwise it's translated into a WXK_DELETE event.
 780         if (event.CmdDown() && event.GetKeyCode() == WXK_BACK)
 781         {
 782             BeginBatchUndo(_("Delete Text"));
 783
 784             long newPos = m_caretPosition;
 785
 786             bool processed = DeleteSelectedContent(& newPos);
 787
 788             // Submit range in character positions, which are greater than caret positions,
 789             // so subtract 1 for deleted character and add 1 for conversion to character position.
 790             if (newPos > -1)
 791             {
 792                 if (event.CmdDown())
 793                 {
 794                     long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 795                     if (pos < newPos)
 796                     {
 797                         GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this);
 798                         processed = true;
 799                     }
 800                 }
 801
 802                 if (!processed)
 803                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this);
 804             }
 805
 806             EndBatchUndo();
 807
 808             if (GetLastPosition() == -1)
 809             {
 810                 GetBuffer().Reset();
 811
 812                 m_caretPosition = -1;
 813                 PositionCaret();
 814                 SetDefaultStyleToCursorStyle();
 815             }
 816
 817             ScrollIntoView(m_caretPosition, WXK_LEFT);
 818
 819             wxRichTextEvent cmdEvent(
 820                 wxEVT_COMMAND_RICHTEXT_DELETE,
 821                 GetId());
 822             cmdEvent.SetEventObject(this);
 823             cmdEvent.SetFlags(flags);
 824             cmdEvent.SetPosition(m_caretPosition+1);
 825             GetEventHandler()->ProcessEvent(cmdEvent);
 826
 827             Update();
 828         }
 829         else
 830             event.Skip();
 831
 832         return;
 833     }
 834
 835     // all the other keys modify the controls contents which shouldn't be
 836     // possible if we're read-only
 837     if ( !IsEditable() )
 838     {
 839         event.Skip();
 840         return;
 841     }
 842
 843     if (event.GetKeyCode() == WXK_RETURN)
 844     {
 845         BeginBatchUndo(_("Insert Text"));
 846
 847         long newPos = m_caretPosition;
 848
 849         DeleteSelectedContent(& newPos);
 850
 851         if (event.ShiftDown())
 852         {
 853             wxString text;
 854             text = wxRichTextLineBreakChar;
 855             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 856             m_caretAtLineStart = true;
 857             PositionCaret();
 858         }
 859         else
 860             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE|wxRICHTEXT_INSERT_INTERACTIVE);
 861
 862         EndBatchUndo();
 863         SetDefaultStyleToCursorStyle();
 864
 865         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 866
 867         wxRichTextEvent cmdEvent(
 868             wxEVT_COMMAND_RICHTEXT_RETURN,
 869             GetId());
 870         cmdEvent.SetEventObject(this);
 871         cmdEvent.SetFlags(flags);
 872         cmdEvent.SetPosition(newPos+1);
 873
 874         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 875         {
 876             // Generate conventional event
 877             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 878             InitCommandEvent(textEvent);
 879
 880             GetEventHandler()->ProcessEvent(textEvent);
 881         }
 882         Update();
 883     }
 884     else if (event.GetKeyCode() == WXK_BACK)
 885     {
 886         BeginBatchUndo(_("Delete Text"));
 887
 888         long newPos = m_caretPosition;
 889
 890         bool processed = DeleteSelectedContent(& newPos);
 891
 892         // Submit range in character positions, which are greater than caret positions,
 893         // so subtract 1 for deleted character and add 1 for conversion to character position.
 894         if (newPos > -1)
 895         {
 896             if (event.CmdDown())
 897             {
 898                 long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 899                 if (pos < newPos)
 900                 {
 901                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this);
 902                     processed = true;
 903                 }
 904             }
 905
 906             if (!processed)
 907                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this);
 908         }
 909
 910         EndBatchUndo();
 911
 912         if (GetLastPosition() == -1)
 913         {
 914             GetBuffer().Reset();
 915
 916             m_caretPosition = -1;
 917             PositionCaret();
 918             SetDefaultStyleToCursorStyle();
 919         }
 920
 921         ScrollIntoView(m_caretPosition, WXK_LEFT);
 922
 923         wxRichTextEvent cmdEvent(
 924             wxEVT_COMMAND_RICHTEXT_DELETE,
 925             GetId());
 926         cmdEvent.SetEventObject(this);
 927         cmdEvent.SetFlags(flags);
 928         cmdEvent.SetPosition(m_caretPosition+1);
 929         GetEventHandler()->ProcessEvent(cmdEvent);
 930
 931         Update();
 932     }
 933     else if (event.GetKeyCode() == WXK_DELETE)
 934     {
 935         BeginBatchUndo(_("Delete Text"));
 936
 937         long newPos = m_caretPosition;
 938
 939         bool processed = DeleteSelectedContent(& newPos);
 940
 941         // Submit range in character positions, which are greater than caret positions,
 942         if (newPos < GetBuffer().GetRange().GetEnd()+1)
 943         {
 944             if (event.CmdDown())
 945             {
 946                 long pos = wxRichTextCtrl::FindNextWordPosition(1);
 947                 if (pos != -1 && (pos > newPos))
 948                 {
 949                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos+1, pos), this);
 950                     processed = true;
 951                 }
 952             }
 953
 954             if (!processed)
 955                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos+1, newPos+1), this);
 956         }
 957
 958         EndBatchUndo();
 959
 960         if (GetLastPosition() == -1)
 961         {
 962             GetBuffer().Reset();
 963
 964             m_caretPosition = -1;
 965             PositionCaret();
 966             SetDefaultStyleToCursorStyle();
 967         }
 968
 969         wxRichTextEvent cmdEvent(
 970             wxEVT_COMMAND_RICHTEXT_DELETE,
 971             GetId());
 972         cmdEvent.SetEventObject(this);
 973         cmdEvent.SetFlags(flags);
 974         cmdEvent.SetPosition(m_caretPosition+1);
 975         GetEventHandler()->ProcessEvent(cmdEvent);
 976
 977         Update();
 978     }
 979     else
 980     {
 981         long keycode = event.GetKeyCode();
 982         switch ( keycode )
 983         {
 984             case WXK_ESCAPE:
 985             {
 986                 event.Skip();
 987                 return;
 988             }
 989
 990             default:
 991             {
 992 #ifdef __WXMAC__
 993                 if (event.CmdDown())
 994 #else
 995                 if (event.CmdDown() || event.AltDown())
 996 #endif
 997                 {
 998                     event.Skip();
 999                     return;
1000                 }
1001
1002                 wxRichTextEvent cmdEvent(
1003                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
1004                     GetId());
1005                 cmdEvent.SetEventObject(this);
1006                 cmdEvent.SetFlags(flags);
1007 #if wxUSE_UNICODE
1008                 cmdEvent.SetCharacter(event.GetUnicodeKey());
1009 #else
1010                 cmdEvent.SetCharacter((wxChar) keycode);
1011 #endif
1012                 cmdEvent.SetPosition(m_caretPosition+1);
1013
1014                 if (keycode == wxT('\t'))
1015                 {
1016                     // See if we need to promote or demote the selection or paragraph at the cursor
1017                     // position, instead of inserting a tab.
1018                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
1019                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
1020                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
1021                     {
1022                         wxRichTextRange range;
1023                         if (HasSelection())
1024                             range = GetSelectionRange();
1025                         else
1026                             range = para->GetRange().FromInternal();
1027
1028                         int promoteBy = event.ShiftDown() ? 1 : -1;
1029
1030                         PromoteList(promoteBy, range, NULL);
1031
1032                         GetEventHandler()->ProcessEvent(cmdEvent);
1033
1034                         return;
1035                     }
1036                 }
1037
1038                 BeginBatchUndo(_("Insert Text"));
1039
1040                 long newPos = m_caretPosition;
1041                 DeleteSelectedContent(& newPos);
1042
1043 #if wxUSE_UNICODE
1044                 wxString str = event.GetUnicodeKey();
1045 #else
1046                 wxString str = (wxChar) event.GetKeyCode();
1047 #endif
1048                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
1049
1050                 EndBatchUndo();
1051
1052                 SetDefaultStyleToCursorStyle();
1053                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
1054
1055                 GetEventHandler()->ProcessEvent(cmdEvent);
1056
1057                 Update();
1058             }
1059         }
1060     }
1061 }
1062
1063 /// Delete content if there is a selection, e.g. when pressing a key.
1064 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
1065 {
1066     if (HasSelection())
1067     {
1068         long pos = m_selectionRange.GetStart();
1069         GetBuffer().DeleteRangeWithUndo(m_selectionRange, this);
1070         m_selectionRange.SetRange(-2, -2);
1071
1072         if (newPos)
1073             *newPos = pos-1;
1074         return true;
1075     }
1076     else
1077         return false;
1078 }
1079
1080 /// Keyboard navigation
1081
1082 /*
1083
1084 Left:       left one character
1085 Right:      right one character
1086 Up:         up one line
1087 Down:       down one line
1088 Ctrl-Left:  left one word
1089 Ctrl-Right: right one word
1090 Ctrl-Up:    previous paragraph start
1091 Ctrl-Down:  next start of paragraph
1092 Home:       start of line
1093 End:        end of line
1094 Ctrl-Home:  start of document
1095 Ctrl-End:   end of document
1096 Page-Up:    Up a screen
1097 Page-Down:  Down a screen
1098
1099 Maybe:
1100
1101 Ctrl-Alt-PgUp: Start of window
1102 Ctrl-Alt-PgDn: End of window
1103 F8:         Start selection mode
1104 Esc:        End selection mode
1105
1106 Adding Shift does the above but starts/extends selection.
1107
1108
1109  */
1110
1111 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
1112 {
1113     bool success = false;
1114
1115     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
1116     {
1117         if (flags & wxRICHTEXT_CTRL_DOWN)
1118             success = WordRight(1, flags);
1119         else
1120             success = MoveRight(1, flags);
1121     }
1122     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
1123     {
1124         if (flags & wxRICHTEXT_CTRL_DOWN)
1125             success = WordLeft(1, flags);
1126         else
1127             success = MoveLeft(1, flags);
1128     }
1129     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
1130     {
1131         if (flags & wxRICHTEXT_CTRL_DOWN)
1132             success = MoveToParagraphStart(flags);
1133         else
1134             success = MoveUp(1, flags);
1135     }
1136     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
1137     {
1138         if (flags & wxRICHTEXT_CTRL_DOWN)
1139             success = MoveToParagraphEnd(flags);
1140         else
1141             success = MoveDown(1, flags);
1142     }
1143     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
1144     {
1145         success = PageUp(1, flags);
1146     }
1147     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1148     {
1149         success = PageDown(1, flags);
1150     }
1151     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
1152     {
1153         if (flags & wxRICHTEXT_CTRL_DOWN)
1154             success = MoveHome(flags);
1155         else
1156             success = MoveToLineStart(flags);
1157     }
1158     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
1159     {
1160         if (flags & wxRICHTEXT_CTRL_DOWN)
1161             success = MoveEnd(flags);
1162         else
1163             success = MoveToLineEnd(flags);
1164     }
1165
1166     if (success)
1167     {
1168         ScrollIntoView(m_caretPosition, keyCode);
1169         SetDefaultStyleToCursorStyle();
1170     }
1171
1172     return success;
1173 }
1174
1175 /// Extend the selection. Selections are in caret positions.
1176 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
1177 {
1178     if (flags & wxRICHTEXT_SHIFT_DOWN)
1179     {
1180         if (oldPos == newPos)
1181             return false;
1182
1183         wxRichTextRange oldSelection = m_selectionRange;
1184
1185         // If not currently selecting, start selecting
1186         if (m_selectionRange.GetStart() == -2)
1187         {
1188             m_selectionAnchor = oldPos;
1189
1190             if (oldPos > newPos)
1191                 m_selectionRange.SetRange(newPos+1, oldPos);
1192             else
1193                 m_selectionRange.SetRange(oldPos+1, newPos);
1194         }
1195         else
1196         {
1197             // Always ensure that the selection range start is greater than
1198             // the end.
1199             if (newPos > m_selectionAnchor)
1200                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
1201             else if (newPos == m_selectionAnchor)
1202                 m_selectionRange = wxRichTextRange(-2, -2);
1203             else
1204                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
1205         }
1206
1207         RefreshForSelectionChange(oldSelection, m_selectionRange);
1208
1209         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
1210         {
1211             wxLogDebug(wxT("Strange selection range"));
1212         }
1213
1214         return true;
1215     }
1216     else
1217         return false;
1218 }
1219
1220 /// Scroll into view, returning true if we scrolled.
1221 /// This takes a _caret_ position.
1222 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1223 {
1224     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1225
1226     if (!line)
1227         return false;
1228
1229     int ppuX, ppuY;
1230     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1231
1232     int startXUnits, startYUnits;
1233     GetViewStart(& startXUnits, & startYUnits);
1234     int startY = startYUnits * ppuY;
1235
1236     int sx = 0, sy = 0;
1237     GetVirtualSize(& sx, & sy);
1238     int sxUnits = 0;
1239     int syUnits = 0;
1240     if (ppuY != 0)
1241         syUnits = sy/ppuY;
1242
1243     wxRect rect = line->GetRect();
1244
1245     bool scrolled = false;
1246
1247     wxSize clientSize = GetClientSize();
1248     clientSize.y -= GetBuffer().GetBottomMargin();
1249
1250     if (GetWindowStyle() & wxRE_CENTRE_CARET)
1251     {
1252         int y = rect.y - GetClientSize().y/2;
1253         int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1254         if (y >= 0 && (y + clientSize.y) < GetBuffer().GetCachedSize().y)
1255         {
1256             if (startYUnits != yUnits)
1257             {
1258                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1259                 scrolled = true;
1260             }
1261 #if !wxRICHTEXT_USE_OWN_CARET
1262             if (scrolled)
1263 #endif
1264                 PositionCaret();
1265
1266             return scrolled;
1267         }
1268     }
1269
1270     // Going down
1271     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1272         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1273         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1274         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1275     {
1276         if ((rect.y + rect.height) > (clientSize.y + startY))
1277         {
1278             // Make it scroll so this item is at the bottom
1279             // of the window
1280             int y = rect.y - (clientSize.y - rect.height);
1281             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1282
1283             // If we're still off the screen, scroll another line down
1284             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1285                 yUnits ++;
1286
1287             if (startYUnits != yUnits)
1288             {
1289                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1290                 scrolled = true;
1291             }
1292         }
1293         else if (rect.y < (startY + GetBuffer().GetTopMargin()))
1294         {
1295             // Make it scroll so this item is at the top
1296             // of the window
1297             int y = rect.y - GetBuffer().GetTopMargin();
1298             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1299
1300             if (startYUnits != yUnits)
1301             {
1302                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1303                 scrolled = true;
1304             }
1305         }
1306     }
1307     // Going up
1308     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1309              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1310              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1311              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1312     {
1313         if (rect.y < (startY + GetBuffer().GetBottomMargin()))
1314         {
1315             // Make it scroll so this item is at the top
1316             // of the window
1317             int y = rect.y - GetBuffer().GetTopMargin();
1318             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1319
1320             if (startYUnits != yUnits)
1321             {
1322                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1323                 scrolled = true;
1324             }
1325         }
1326         else if ((rect.y + rect.height) > (clientSize.y + startY))
1327         {
1328             // Make it scroll so this item is at the bottom
1329             // of the window
1330             int y = rect.y - (clientSize.y - rect.height);
1331             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1332
1333             // If we're still off the screen, scroll another line down
1334             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1335                 yUnits ++;
1336
1337             if (startYUnits != yUnits)
1338             {
1339                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1340                 scrolled = true;
1341             }
1342         }
1343     }
1344
1345 #if !wxRICHTEXT_USE_OWN_CARET
1346     if (scrolled)
1347 #endif
1348         PositionCaret();
1349
1350     return scrolled;
1351 }
1352
1353 /// Is the given position visible on the screen?
1354 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1355 {
1356     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1357
1358     if (!line)
1359         return false;
1360
1361     int ppuX, ppuY;
1362     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1363
1364     int startX, startY;
1365     GetViewStart(& startX, & startY);
1366     startX = 0;
1367     startY = startY * ppuY;
1368
1369     wxRect rect = line->GetRect();
1370     wxSize clientSize = GetClientSize();
1371     clientSize.y -= GetBuffer().GetBottomMargin();
1372
1373     return (rect.GetBottom() > (startY + GetBuffer().GetTopMargin())) && (rect.GetTop() < (startY + clientSize.y));
1374 }
1375
1376 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1377 {
1378     m_caretPosition = position;
1379     m_caretAtLineStart = showAtLineStart;
1380 }
1381
1382 /// Move caret one visual step forward: this may mean setting a flag
1383 /// and keeping the same position if we're going from the end of one line
1384 /// to the start of the next, which may be the exact same caret position.
1385 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1386 {
1387     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1388
1389     // Only do the check if we're not at the end of the paragraph (where things work OK
1390     // anyway)
1391     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1392     {
1393         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1394
1395         if (line)
1396         {
1397             wxRichTextRange lineRange = line->GetAbsoluteRange();
1398
1399             // We're at the end of a line. See whether we need to
1400             // stay at the same actual caret position but change visual
1401             // position, or not.
1402             if (oldPosition == lineRange.GetEnd())
1403             {
1404                 if (m_caretAtLineStart)
1405                 {
1406                     // We're already at the start of the line, so actually move on now.
1407                     m_caretPosition = oldPosition + 1;
1408                     m_caretAtLineStart = false;
1409                 }
1410                 else
1411                 {
1412                     // We're showing at the end of the line, so keep to
1413                     // the same position but indicate that we're to show
1414                     // at the start of the next line.
1415                     m_caretPosition = oldPosition;
1416                     m_caretAtLineStart = true;
1417                 }
1418                 SetDefaultStyleToCursorStyle();
1419                 return;
1420             }
1421         }
1422     }
1423     m_caretPosition ++;
1424     SetDefaultStyleToCursorStyle();
1425 }
1426
1427 /// Move caret one visual step backward: this may mean setting a flag
1428 /// and keeping the same position if we're going from the end of one line
1429 /// to the start of the next, which may be the exact same caret position.
1430 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1431 {
1432     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1433
1434     // Only do the check if we're not at the start of the paragraph (where things work OK
1435     // anyway)
1436     if (para && (oldPosition != para->GetRange().GetStart()))
1437     {
1438         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1439
1440         if (line)
1441         {
1442             wxRichTextRange lineRange = line->GetAbsoluteRange();
1443
1444             // We're at the start of a line. See whether we need to
1445             // stay at the same actual caret position but change visual
1446             // position, or not.
1447             if (oldPosition == lineRange.GetStart())
1448             {
1449                 m_caretPosition = oldPosition-1;
1450                 m_caretAtLineStart = true;
1451                 return;
1452             }
1453             else if (oldPosition == lineRange.GetEnd())
1454             {
1455                 if (m_caretAtLineStart)
1456                 {
1457                     // We're at the start of the line, so keep the same caret position
1458                     // but clear the start-of-line flag.
1459                     m_caretPosition = oldPosition;
1460                     m_caretAtLineStart = false;
1461                 }
1462                 else
1463                 {
1464                     // We're showing at the end of the line, so go back
1465                     // to the previous character position.
1466                     m_caretPosition = oldPosition - 1;
1467                 }
1468                 SetDefaultStyleToCursorStyle();
1469                 return;
1470             }
1471         }
1472     }
1473     m_caretPosition --;
1474     SetDefaultStyleToCursorStyle();
1475 }
1476
1477 /// Move right
1478 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1479 {
1480     long endPos = GetBuffer().GetRange().GetEnd();
1481
1482     if (m_caretPosition + noPositions < endPos)
1483     {
1484         long oldPos = m_caretPosition;
1485         long newPos = m_caretPosition + noPositions;
1486
1487         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1488         if (!extendSel)
1489             SelectNone();
1490
1491         // Determine by looking at oldPos and m_caretPosition whether
1492         // we moved from the end of a line to the start of the next line, in which case
1493         // we want to adjust the caret position such that it is positioned at the
1494         // start of the next line, rather than jumping past the first character of the
1495         // line.
1496         if (noPositions == 1 && !extendSel)
1497             MoveCaretForward(oldPos);
1498         else
1499             SetCaretPosition(newPos);
1500
1501         PositionCaret();
1502         SetDefaultStyleToCursorStyle();
1503
1504         return true;
1505     }
1506     else
1507         return false;
1508 }
1509
1510 /// Move left
1511 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1512 {
1513     long startPos = -1;
1514
1515     if (m_caretPosition > startPos - noPositions + 1)
1516     {
1517         long oldPos = m_caretPosition;
1518         long newPos = m_caretPosition - noPositions;
1519         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1520         if (!extendSel)
1521             SelectNone();
1522
1523         if (noPositions == 1 && !extendSel)
1524             MoveCaretBack(oldPos);
1525         else
1526             SetCaretPosition(newPos);
1527
1528         PositionCaret();
1529         SetDefaultStyleToCursorStyle();
1530
1531         return true;
1532     }
1533     else
1534         return false;
1535 }
1536
1537 /// Move up
1538 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1539 {
1540     return MoveDown(- noLines, flags);
1541 }
1542
1543 /// Move up
1544 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1545 {
1546     if (!GetCaret())
1547         return false;
1548
1549     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1550     wxPoint pt = GetCaret()->GetPosition();
1551     long newLine = lineNumber + noLines;
1552
1553     if (lineNumber != -1)
1554     {
1555         if (noLines > 0)
1556         {
1557             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1558
1559             if (newLine > lastLine)
1560                 return false;
1561         }
1562         else
1563         {
1564             if (newLine < 0)
1565                 return false;
1566         }
1567     }
1568
1569     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1570     if (lineObj)
1571     {
1572         pt.y = lineObj->GetAbsolutePosition().y + 2;
1573     }
1574     else
1575         return false;
1576
1577     long newPos = 0;
1578     wxClientDC dc(this);
1579     PrepareDC(dc);
1580     dc.SetFont(GetFont());
1581
1582     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1583
1584     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1585     {
1586         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1587         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1588         // so we view the caret at the start of the line.
1589         bool caretLineStart = false;
1590         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1591         {
1592             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1593             wxRichTextRange lineRange;
1594             if (thisLine)
1595                 lineRange = thisLine->GetAbsoluteRange();
1596
1597             if (thisLine && (newPos-1) == lineRange.GetEnd())
1598             {
1599                 newPos --;
1600                 caretLineStart = true;
1601             }
1602             else
1603             {
1604                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1605                 if (para && para->GetRange().GetStart() == newPos)
1606                     newPos --;
1607             }
1608         }
1609
1610         long newSelEnd = newPos;
1611
1612         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1613         if (!extendSel)
1614             SelectNone();
1615
1616         SetCaretPosition(newPos, caretLineStart);
1617         PositionCaret();
1618         SetDefaultStyleToCursorStyle();
1619
1620         return true;
1621     }
1622
1623     return false;
1624 }
1625
1626 /// Move to the end of the paragraph
1627 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1628 {
1629     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1630     if (para)
1631     {
1632         long newPos = para->GetRange().GetEnd() - 1;
1633         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1634         if (!extendSel)
1635             SelectNone();
1636
1637         SetCaretPosition(newPos);
1638         PositionCaret();
1639         SetDefaultStyleToCursorStyle();
1640
1641         return true;
1642     }
1643
1644     return false;
1645 }
1646
1647 /// Move to the start of the paragraph
1648 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1649 {
1650     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1651     if (para)
1652     {
1653         long newPos = para->GetRange().GetStart() - 1;
1654         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1655         if (!extendSel)
1656             SelectNone();
1657
1658         SetCaretPosition(newPos);
1659         PositionCaret();
1660         SetDefaultStyleToCursorStyle();
1661
1662         return true;
1663     }
1664
1665     return false;
1666 }
1667
1668 /// Move to the end of the line
1669 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1670 {
1671     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1672
1673     if (line)
1674     {
1675         wxRichTextRange lineRange = line->GetAbsoluteRange();
1676         long newPos = lineRange.GetEnd();
1677         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1678         if (!extendSel)
1679             SelectNone();
1680
1681         SetCaretPosition(newPos);
1682         PositionCaret();
1683         SetDefaultStyleToCursorStyle();
1684
1685         return true;
1686     }
1687
1688     return false;
1689 }
1690
1691 /// Move to the start of the line
1692 bool wxRichTextCtrl::MoveToLineStart(int flags)
1693 {
1694     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1695     if (line)
1696     {
1697         wxRichTextRange lineRange = line->GetAbsoluteRange();
1698         long newPos = lineRange.GetStart()-1;
1699
1700         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1701         if (!extendSel)
1702             SelectNone();
1703
1704         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1705
1706         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1707         PositionCaret();
1708         SetDefaultStyleToCursorStyle();
1709
1710         return true;
1711     }
1712
1713     return false;
1714 }
1715
1716 /// Move to the start of the buffer
1717 bool wxRichTextCtrl::MoveHome(int flags)
1718 {
1719     if (m_caretPosition != -1)
1720     {
1721         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1722         if (!extendSel)
1723             SelectNone();
1724
1725         SetCaretPosition(-1);
1726         PositionCaret();
1727         SetDefaultStyleToCursorStyle();
1728
1729         return true;
1730     }
1731     else
1732         return false;
1733 }
1734
1735 /// Move to the end of the buffer
1736 bool wxRichTextCtrl::MoveEnd(int flags)
1737 {
1738     long endPos = GetBuffer().GetRange().GetEnd()-1;
1739
1740     if (m_caretPosition != endPos)
1741     {
1742         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1743         if (!extendSel)
1744             SelectNone();
1745
1746         SetCaretPosition(endPos);
1747         PositionCaret();
1748         SetDefaultStyleToCursorStyle();
1749
1750         return true;
1751     }
1752     else
1753         return false;
1754 }
1755
1756 /// Move noPages pages up
1757 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1758 {
1759     return PageDown(- noPages, flags);
1760 }
1761
1762 /// Move noPages pages down
1763 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1764 {
1765     // Calculate which line occurs noPages * screen height further down.
1766     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1767     if (line)
1768     {
1769         wxSize clientSize = GetClientSize();
1770         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1771
1772         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1773         if (newLine)
1774         {
1775             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1776             long pos = lineRange.GetStart()-1;
1777             if (pos != m_caretPosition)
1778             {
1779                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1780
1781                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1782                 if (!extendSel)
1783                     SelectNone();
1784
1785                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1786                 PositionCaret();
1787                 SetDefaultStyleToCursorStyle();
1788
1789                 return true;
1790             }
1791         }
1792     }
1793
1794     return false;
1795 }
1796
1797 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1798 {
1799     return str == wxT(" ") || str == wxT("\t");
1800 }
1801
1802 // Finds the caret position for the next word
1803 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1804 {
1805     long endPos = GetBuffer().GetRange().GetEnd();
1806
1807     if (direction > 0)
1808     {
1809         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1810
1811         // First skip current text to space
1812         while (i < endPos && i > -1)
1813         {
1814             // i is in character, not caret positions
1815             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1816             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1817             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1818             {
1819                 break;
1820             }
1821             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1822                 i += direction;
1823             else
1824             {
1825                 break;
1826             }
1827         }
1828         while (i < endPos && i > -1)
1829         {
1830             // i is in character, not caret positions
1831             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1832             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1833             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1834                 return wxMax(-1, i);
1835
1836             if (text.empty()) // End of paragraph, or maybe an image
1837                 return wxMax(-1, i - 1);
1838             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1839                 i += direction;
1840             else
1841             {
1842                 // Convert to caret position
1843                 return wxMax(-1, i - 1);
1844             }
1845         }
1846         if (i >= endPos)
1847             return endPos-1;
1848         return i-1;
1849     }
1850     else
1851     {
1852         long i = m_caretPosition;
1853
1854         // First skip white space
1855         while (i < endPos && i > -1)
1856         {
1857             // i is in character, not caret positions
1858             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1859             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1860
1861             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1862                 break;
1863             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1864                 i += direction;
1865             else
1866                 break;
1867         }
1868         // Next skip current text to space
1869         while (i < endPos && i > -1)
1870         {
1871             // i is in character, not caret positions
1872             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1873             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1874             if (line && line->GetAbsoluteRange().GetStart() == i)
1875                 return i-1;
1876
1877             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1878                 i += direction;
1879             else
1880             {
1881                 return i;
1882             }
1883         }
1884         if (i < -1)
1885             return -1;
1886         return i;
1887     }
1888 }
1889
1890 /// Move n words left
1891 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1892 {
1893     long pos = FindNextWordPosition(-1);
1894     if (pos != m_caretPosition)
1895     {
1896         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1897
1898         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1899         if (!extendSel)
1900             SelectNone();
1901
1902         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1903         PositionCaret();
1904         SetDefaultStyleToCursorStyle();
1905
1906         return true;
1907     }
1908
1909     return false;
1910 }
1911
1912 /// Move n words right
1913 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1914 {
1915     long pos = FindNextWordPosition(1);
1916     if (pos != m_caretPosition)
1917     {
1918         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1919
1920         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1921         if (!extendSel)
1922             SelectNone();
1923
1924         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1925         PositionCaret();
1926         SetDefaultStyleToCursorStyle();
1927
1928         return true;
1929     }
1930
1931     return false;
1932 }
1933
1934 /// Sizing
1935 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1936 {
1937     // Only do sizing optimization for large buffers
1938     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1939     {
1940         m_fullLayoutRequired = true;
1941         m_fullLayoutTime = wxGetLocalTimeMillis();
1942         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1943         LayoutContent(true /* onlyVisibleRect */);
1944     }
1945     else
1946         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1947
1948 #if wxRICHTEXT_BUFFERED_PAINTING
1949     RecreateBuffer();
1950 #endif
1951
1952     event.Skip();
1953 }
1954
1955
1956 /// Idle-time processing
1957 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1958 {
1959 #if wxRICHTEXT_USE_OWN_CARET
1960     if (((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
1961     {
1962         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate(false);
1963         PositionCaret();
1964         GetCaret()->Show();
1965     }
1966 #endif
1967
1968     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1969
1970     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1971     {
1972         m_fullLayoutRequired = false;
1973         m_fullLayoutTime = 0;
1974         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1975         ShowPosition(m_fullLayoutSavedPosition);
1976         Refresh(false);
1977     }
1978
1979     if (m_caretPositionForDefaultStyle != -2)
1980     {
1981         // If the caret position has changed, no longer reflect the default style
1982         // in the UI.
1983         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1984             m_caretPositionForDefaultStyle = -2;
1985     }
1986
1987     event.Skip();
1988 }
1989
1990 /// Scrolling
1991 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1992 {
1993 #if wxRICHTEXT_USE_OWN_CARET
1994     if (!((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
1995     {
1996         GetCaret()->Hide();
1997         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate();
1998     }
1999 #endif
2000
2001     event.Skip();
2002 }
2003
2004 /// Set up scrollbars, e.g. after a resize
2005 void wxRichTextCtrl::SetupScrollbars(bool atTop)
2006 {
2007     if (IsFrozen())
2008         return;
2009
2010     if (GetBuffer().IsEmpty())
2011     {
2012         SetScrollbars(0, 0, 0, 0, 0, 0);
2013         return;
2014     }
2015
2016     // TODO: reimplement scrolling so we scroll by line, not by fixed number
2017     // of pixels. See e.g. wxVScrolledWindow for ideas.
2018     int pixelsPerUnit = 5;
2019     wxSize clientSize = GetClientSize();
2020
2021     int maxHeight = GetBuffer().GetCachedSize().y + GetBuffer().GetTopMargin();
2022
2023     // Round up so we have at least maxHeight pixels
2024     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
2025
2026     int startX = 0, startY = 0;
2027     if (!atTop)
2028         GetViewStart(& startX, & startY);
2029
2030     int maxPositionX = 0;
2031     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
2032
2033     int newStartX = wxMin(maxPositionX, startX);
2034     int newStartY = wxMin(maxPositionY, startY);
2035
2036     int oldPPUX, oldPPUY;
2037     int oldStartX, oldStartY;
2038     int oldVirtualSizeX = 0, oldVirtualSizeY = 0;
2039     GetScrollPixelsPerUnit(& oldPPUX, & oldPPUY);
2040     GetViewStart(& oldStartX, & oldStartY);
2041     GetVirtualSize(& oldVirtualSizeX, & oldVirtualSizeY);
2042     if (oldPPUY > 0)
2043         oldVirtualSizeY /= oldPPUY;
2044
2045     if (oldPPUX == 0 && oldPPUY == pixelsPerUnit && oldVirtualSizeY == unitsY && oldStartX == newStartX && oldStartY == newStartY)
2046         return;
2047
2048     // Don't set scrollbars if there were none before, and there will be none now.
2049     if (oldPPUY != 0 && (oldVirtualSizeY < clientSize.y) && (unitsY*pixelsPerUnit < clientSize.y))
2050         return;
2051
2052     // Move to previous scroll position if
2053     // possible
2054     SetScrollbars(0, pixelsPerUnit, 0, unitsY, newStartX, newStartY);
2055 }
2056
2057 /// Paint the background
2058 void wxRichTextCtrl::PaintBackground(wxDC& dc)
2059 {
2060     wxColour backgroundColour = GetBackgroundColour();
2061     if (!backgroundColour.Ok())
2062         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
2063
2064     // Clear the background
2065     dc.SetBrush(wxBrush(backgroundColour));
2066     dc.SetPen(*wxTRANSPARENT_PEN);
2067     wxRect windowRect(GetClientSize());
2068     windowRect.x -= 2; windowRect.y -= 2;
2069     windowRect.width += 4; windowRect.height += 4;
2070
2071     // We need to shift the rectangle to take into account
2072     // scrolling. Converting device to logical coordinates.
2073     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
2074     dc.DrawRectangle(windowRect);
2075 }
2076
2077 #if wxRICHTEXT_BUFFERED_PAINTING
2078 /// Recreate buffer bitmap if necessary
2079 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
2080 {
2081     wxSize sz = size;
2082     if (sz == wxDefaultSize)
2083         sz = GetClientSize();
2084
2085     if (sz.x < 1 || sz.y < 1)
2086         return false;
2087
2088     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
2089         m_bufferBitmap = wxBitmap(sz.x, sz.y);
2090     return m_bufferBitmap.Ok();
2091 }
2092 #endif
2093
2094 // ----------------------------------------------------------------------------
2095 // file IO functions
2096 // ----------------------------------------------------------------------------
2097
2098 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
2099 {
2100     bool success = GetBuffer().LoadFile(filename, (wxRichTextFileType)fileType);
2101     if (success)
2102         m_filename = filename;
2103
2104     DiscardEdits();
2105     SetInsertionPoint(0);
2106     LayoutContent();
2107     PositionCaret();
2108     SetupScrollbars(true);
2109     Refresh(false);
2110     wxTextCtrl::SendTextUpdatedEvent(this);
2111
2112     if (success)
2113         return true;
2114     else
2115     {
2116         wxLogError(_("File couldn't be loaded."));
2117
2118         return false;
2119     }
2120 }
2121
2122 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
2123 {
2124     if (GetBuffer().SaveFile(filename, (wxRichTextFileType)fileType))
2125     {
2126         m_filename = filename;
2127
2128         DiscardEdits();
2129
2130         return true;
2131     }
2132
2133     wxLogError(_("The text couldn't be saved."));
2134
2135     return false;
2136 }
2137
2138 // ----------------------------------------------------------------------------
2139 // wxRichTextCtrl specific functionality
2140 // ----------------------------------------------------------------------------
2141
2142 /// Add a new paragraph of text to the end of the buffer
2143 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
2144 {
2145     wxRichTextRange range = GetBuffer().AddParagraph(text);
2146     LayoutContent();
2147     return range;
2148 }
2149
2150 /// Add an image
2151 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
2152 {
2153     wxRichTextRange range = GetBuffer().AddImage(image);
2154     LayoutContent();
2155     return range;
2156 }
2157
2158 // ----------------------------------------------------------------------------
2159 // selection and ranges
2160 // ----------------------------------------------------------------------------
2161
2162 void wxRichTextCtrl::SelectAll()
2163 {
2164     SetSelection(0, GetLastPosition()+1);
2165     m_selectionAnchor = -1;
2166 }
2167
2168 /// Select none
2169 void wxRichTextCtrl::SelectNone()
2170 {
2171     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
2172     {
2173         wxRichTextRange oldSelection = m_selectionRange;
2174
2175         m_selectionRange = wxRichTextRange(-2, -2);
2176
2177         RefreshForSelectionChange(oldSelection, m_selectionRange);
2178     }
2179     m_selectionAnchor = -2;
2180 }
2181
2182 static bool wxIsWordDelimiter(const wxString& text)
2183 {
2184     return !text.IsEmpty() && !wxIsalnum(text[0]);
2185 }
2186
2187 /// Select the word at the given character position
2188 bool wxRichTextCtrl::SelectWord(long position)
2189 {
2190     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
2191         return false;
2192
2193     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
2194     if (!para)
2195         return false;
2196
2197     if (position == para->GetRange().GetEnd())
2198         position --;
2199
2200     long positionStart = position;
2201     long positionEnd = position;
2202
2203     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
2204     {
2205         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
2206         if (wxIsWordDelimiter(text))
2207         {
2208             positionStart ++;
2209             break;
2210         }
2211     }
2212     if (positionStart < para->GetRange().GetStart())
2213         positionStart = para->GetRange().GetStart();
2214
2215     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
2216     {
2217         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
2218         if (wxIsWordDelimiter(text))
2219         {
2220             positionEnd --;
2221             break;
2222         }
2223     }
2224     if (positionEnd >= para->GetRange().GetEnd())
2225         positionEnd = para->GetRange().GetEnd();
2226
2227     if (positionEnd < positionStart)
2228         return false;
2229
2230     SetSelection(positionStart, positionEnd+1);
2231
2232     if (positionStart >= 0)
2233     {
2234         MoveCaret(positionStart-1, true);
2235         SetDefaultStyleToCursorStyle();
2236     }
2237
2238     return true;
2239 }
2240
2241 wxString wxRichTextCtrl::GetStringSelection() const
2242 {
2243     long from, to;
2244     GetSelection(&from, &to);
2245
2246     return GetRange(from, to);
2247 }
2248
2249 // ----------------------------------------------------------------------------
2250 // hit testing
2251 // ----------------------------------------------------------------------------
2252
2253 wxTextCtrlHitTestResult
2254 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2255 {
2256     // implement in terms of the other overload as the native ports typically
2257     // can get the position and not (x, y) pair directly (although wxUniv
2258     // directly gets x and y -- and so overrides this method as well)
2259     long pos;
2260     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2261
2262     if ( rc != wxTE_HT_UNKNOWN )
2263     {
2264         PositionToXY(pos, x, y);
2265     }
2266
2267     return rc;
2268 }
2269
2270 wxTextCtrlHitTestResult
2271 wxRichTextCtrl::HitTest(const wxPoint& pt,
2272                         long * pos) const
2273 {
2274     wxClientDC dc((wxRichTextCtrl*) this);
2275     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2276
2277     // Buffer uses logical position (relative to start of buffer)
2278     // so convert
2279     wxPoint pt2 = GetLogicalPoint(pt);
2280
2281     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
2282
2283     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2284         return wxTE_HT_BEFORE;
2285     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2286         return wxTE_HT_BEYOND;
2287     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2288         return wxTE_HT_ON_TEXT;
2289
2290     return wxTE_HT_UNKNOWN;
2291 }
2292
2293 // ----------------------------------------------------------------------------
2294 // set/get the controls text
2295 // ----------------------------------------------------------------------------
2296
2297 wxString wxRichTextCtrl::GetValue() const
2298 {
2299     return GetBuffer().GetText();
2300 }
2301
2302 wxString wxRichTextCtrl::GetRange(long from, long to) const
2303 {
2304     // Public API for range is different from internals
2305     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2306 }
2307
2308 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2309 {
2310     // Don't call Clear here, since it always sends a text updated event
2311     m_buffer.ResetAndClearCommands();
2312     m_buffer.SetDirty(true);
2313     m_caretPosition = -1;
2314     m_caretPositionForDefaultStyle = -2;
2315     m_caretAtLineStart = false;
2316     m_selectionRange.SetRange(-2, -2);
2317
2318     Scroll(0,0);
2319
2320     if (!IsFrozen())
2321     {
2322         LayoutContent();
2323         Refresh(false);
2324     }
2325
2326     if (!value.IsEmpty())
2327     {
2328         // Remove empty paragraph
2329         GetBuffer().Clear();
2330         DoWriteText(value, flags);
2331
2332         // for compatibility, don't move the cursor when doing SetValue()
2333         SetInsertionPoint(0);
2334     }
2335     else
2336     {
2337         // still send an event for consistency
2338         if (flags & SetValue_SendEvent)
2339             wxTextCtrl::SendTextUpdatedEvent(this);
2340     }
2341     DiscardEdits();
2342 }
2343
2344 void wxRichTextCtrl::WriteText(const wxString& value)
2345 {
2346     DoWriteText(value);
2347 }
2348
2349 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2350 {
2351     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2352
2353     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2354
2355     if ( flags & SetValue_SendEvent )
2356         wxTextCtrl::SendTextUpdatedEvent(this);
2357 }
2358
2359 void wxRichTextCtrl::AppendText(const wxString& text)
2360 {
2361     SetInsertionPointEnd();
2362
2363     WriteText(text);
2364 }
2365
2366 /// Write an image at the current insertion point
2367 bool wxRichTextCtrl::WriteImage(const wxImage& image, wxBitmapType bitmapType)
2368 {
2369     wxRichTextImageBlock imageBlock;
2370
2371     wxImage image2 = image;
2372     if (imageBlock.MakeImageBlock(image2, bitmapType))
2373         return WriteImage(imageBlock);
2374
2375     return false;
2376 }
2377
2378 bool wxRichTextCtrl::WriteImage(const wxString& filename, wxBitmapType bitmapType)
2379 {
2380     wxRichTextImageBlock imageBlock;
2381
2382     wxImage image;
2383     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2384         return WriteImage(imageBlock);
2385
2386     return false;
2387 }
2388
2389 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2390 {
2391     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2392 }
2393
2394 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, wxBitmapType bitmapType)
2395 {
2396     if (bitmap.Ok())
2397     {
2398         wxRichTextImageBlock imageBlock;
2399
2400         wxImage image = bitmap.ConvertToImage();
2401         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2402             return WriteImage(imageBlock);
2403     }
2404
2405     return false;
2406 }
2407
2408 /// Insert a newline (actually paragraph) at the current insertion point.
2409 bool wxRichTextCtrl::Newline()
2410 {
2411     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2412 }
2413
2414 /// Insert a line break at the current insertion point.
2415 bool wxRichTextCtrl::LineBreak()
2416 {
2417     wxString text;
2418     text = wxRichTextLineBreakChar;
2419     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2420 }
2421
2422 // ----------------------------------------------------------------------------
2423 // Clipboard operations
2424 // ----------------------------------------------------------------------------
2425
2426 void wxRichTextCtrl::Copy()
2427 {
2428     if (CanCopy())
2429     {
2430         wxRichTextRange range = GetInternalSelectionRange();
2431         GetBuffer().CopyToClipboard(range);
2432     }
2433 }
2434
2435 void wxRichTextCtrl::Cut()
2436 {
2437     if (CanCut())
2438     {
2439         wxRichTextRange range = GetInternalSelectionRange();
2440         GetBuffer().CopyToClipboard(range);
2441
2442         DeleteSelectedContent();
2443         LayoutContent();
2444         Refresh(false);
2445     }
2446 }
2447
2448 void wxRichTextCtrl::Paste()
2449 {
2450     if (CanPaste())
2451     {
2452         BeginBatchUndo(_("Paste"));
2453
2454         long newPos = m_caretPosition;
2455         DeleteSelectedContent(& newPos);
2456
2457         GetBuffer().PasteFromClipboard(newPos);
2458
2459         EndBatchUndo();
2460     }
2461 }
2462
2463 void wxRichTextCtrl::DeleteSelection()
2464 {
2465     if (CanDeleteSelection())
2466     {
2467         DeleteSelectedContent();
2468     }
2469 }
2470
2471 bool wxRichTextCtrl::HasSelection() const
2472 {
2473     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2474 }
2475
2476 bool wxRichTextCtrl::CanCopy() const
2477 {
2478     // Can copy if there's a selection
2479     return HasSelection();
2480 }
2481
2482 bool wxRichTextCtrl::CanCut() const
2483 {
2484     return HasSelection() && IsEditable();
2485 }
2486
2487 bool wxRichTextCtrl::CanPaste() const
2488 {
2489     if ( !IsEditable() )
2490         return false;
2491
2492     return GetBuffer().CanPasteFromClipboard();
2493 }
2494
2495 bool wxRichTextCtrl::CanDeleteSelection() const
2496 {
2497     return HasSelection() && IsEditable();
2498 }
2499
2500
2501 // ----------------------------------------------------------------------------
2502 // Accessors
2503 // ----------------------------------------------------------------------------
2504
2505 void wxRichTextCtrl::SetEditable(bool editable)
2506 {
2507     m_editable = editable;
2508 }
2509
2510 void wxRichTextCtrl::SetInsertionPoint(long pos)
2511 {
2512     SelectNone();
2513
2514     m_caretPosition = pos - 1;
2515
2516     PositionCaret();
2517 }
2518
2519 void wxRichTextCtrl::SetInsertionPointEnd()
2520 {
2521     long pos = GetLastPosition();
2522     SetInsertionPoint(pos);
2523 }
2524
2525 long wxRichTextCtrl::GetInsertionPoint() const
2526 {
2527     return m_caretPosition+1;
2528 }
2529
2530 wxTextPos wxRichTextCtrl::GetLastPosition() const
2531 {
2532     return GetBuffer().GetRange().GetEnd();
2533 }
2534
2535 // If the return values from and to are the same, there is no
2536 // selection.
2537 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2538 {
2539     *from = m_selectionRange.GetStart();
2540     *to = m_selectionRange.GetEnd();
2541     if ((*to) != -1 && (*to) != -2)
2542         (*to) ++;
2543 }
2544
2545 bool wxRichTextCtrl::IsEditable() const
2546 {
2547     return m_editable;
2548 }
2549
2550 // ----------------------------------------------------------------------------
2551 // selection
2552 // ----------------------------------------------------------------------------
2553
2554 void wxRichTextCtrl::SetSelection(long from, long to)
2555 {
2556     // if from and to are both -1, it means (in wxWidgets) that all text should
2557     // be selected.
2558     if ( (from == -1) && (to == -1) )
2559     {
2560         from = 0;
2561         to = GetLastPosition()+1;
2562     }
2563
2564     DoSetSelection(from, to);
2565 }
2566
2567 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2568 {
2569     if (from == to)
2570     {
2571         SelectNone();
2572     }
2573     else
2574     {
2575         wxRichTextRange oldSelection = m_selectionRange;
2576         m_selectionAnchor = from;
2577         m_selectionRange.SetRange(from, to-1);
2578         if (from > -2)
2579             m_caretPosition = from-1;
2580
2581         RefreshForSelectionChange(oldSelection, m_selectionRange);
2582         PositionCaret();
2583     }
2584 }
2585
2586 // ----------------------------------------------------------------------------
2587 // Editing
2588 // ----------------------------------------------------------------------------
2589
2590 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2591                              const wxString& value)
2592 {
2593     BeginBatchUndo(_("Replace"));
2594
2595     DeleteSelectedContent();
2596
2597     DoWriteText(value, SetValue_SelectionOnly);
2598
2599     EndBatchUndo();
2600 }
2601
2602 void wxRichTextCtrl::Remove(long from, long to)
2603 {
2604     SelectNone();
2605
2606     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to-1), this);
2607
2608     LayoutContent();
2609     if (!IsFrozen())
2610         Refresh(false);
2611 }
2612
2613 bool wxRichTextCtrl::IsModified() const
2614 {
2615     return m_buffer.IsModified();
2616 }
2617
2618 void wxRichTextCtrl::MarkDirty()
2619 {
2620     m_buffer.Modify(true);
2621 }
2622
2623 void wxRichTextCtrl::DiscardEdits()
2624 {
2625     m_caretPositionForDefaultStyle = -2;
2626     m_buffer.Modify(false);
2627     m_buffer.GetCommandProcessor()->ClearCommands();
2628 }
2629
2630 int wxRichTextCtrl::GetNumberOfLines() const
2631 {
2632     return GetBuffer().GetParagraphCount();
2633 }
2634
2635 // ----------------------------------------------------------------------------
2636 // Positions <-> coords
2637 // ----------------------------------------------------------------------------
2638
2639 long wxRichTextCtrl::XYToPosition(long x, long y) const
2640 {
2641     return GetBuffer().XYToPosition(x, y);
2642 }
2643
2644 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2645 {
2646     return GetBuffer().PositionToXY(pos, x, y);
2647 }
2648
2649 // ----------------------------------------------------------------------------
2650 //
2651 // ----------------------------------------------------------------------------
2652
2653 void wxRichTextCtrl::ShowPosition(long pos)
2654 {
2655     if (!IsPositionVisible(pos))
2656         ScrollIntoView(pos-1, WXK_DOWN);
2657 }
2658
2659 int wxRichTextCtrl::GetLineLength(long lineNo) const
2660 {
2661     return GetBuffer().GetParagraphLength(lineNo);
2662 }
2663
2664 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2665 {
2666     return GetBuffer().GetParagraphText(lineNo);
2667 }
2668
2669 // ----------------------------------------------------------------------------
2670 // Undo/redo
2671 // ----------------------------------------------------------------------------
2672
2673 void wxRichTextCtrl::Undo()
2674 {
2675     if (CanUndo())
2676     {
2677         GetCommandProcessor()->Undo();
2678     }
2679 }
2680
2681 void wxRichTextCtrl::Redo()
2682 {
2683     if (CanRedo())
2684     {
2685         GetCommandProcessor()->Redo();
2686     }
2687 }
2688
2689 bool wxRichTextCtrl::CanUndo() const
2690 {
2691     return GetCommandProcessor()->CanUndo();
2692 }
2693
2694 bool wxRichTextCtrl::CanRedo() const
2695 {
2696     return GetCommandProcessor()->CanRedo();
2697 }
2698
2699 // ----------------------------------------------------------------------------
2700 // implementation details
2701 // ----------------------------------------------------------------------------
2702
2703 void wxRichTextCtrl::Command(wxCommandEvent& event)
2704 {
2705     SetValue(event.GetString());
2706     GetEventHandler()->ProcessEvent(event);
2707 }
2708
2709 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2710 {
2711     // By default, load the first file into the text window.
2712     if (event.GetNumberOfFiles() > 0)
2713     {
2714         LoadFile(event.GetFiles()[0]);
2715     }
2716 }
2717
2718 wxSize wxRichTextCtrl::DoGetBestSize() const
2719 {
2720     return wxSize(10, 10);
2721 }
2722
2723 // ----------------------------------------------------------------------------
2724 // standard handlers for standard edit menu events
2725 // ----------------------------------------------------------------------------
2726
2727 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2728 {
2729     Cut();
2730 }
2731
2732 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2733 {
2734     DeleteSelection();
2735 }
2736
2737 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2738 {
2739     Copy();
2740 }
2741
2742 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2743 {
2744     Paste();
2745 }
2746
2747 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2748 {
2749     Undo();
2750 }
2751
2752 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2753 {
2754     Redo();
2755 }
2756
2757 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2758 {
2759     event.Enable( CanCut() );
2760 }
2761
2762 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2763 {
2764     event.Enable( CanCopy() );
2765 }
2766
2767 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2768 {
2769     event.Enable( CanDeleteSelection() );
2770 }
2771
2772 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2773 {
2774     event.Enable( CanPaste() );
2775 }
2776
2777 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2778 {
2779     event.Enable( CanUndo() );
2780     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2781 }
2782
2783 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2784 {
2785     event.Enable( CanRedo() );
2786     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2787 }
2788
2789 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2790 {
2791     SelectAll();
2792 }
2793
2794 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2795 {
2796     event.Enable(GetLastPosition() > 0);
2797 }
2798
2799 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2800 {
2801     if (event.GetEventObject() != this)
2802     {
2803         event.Skip();
2804         return;
2805     }
2806
2807     if (!m_contextMenu)
2808     {
2809         m_contextMenu = new wxMenu;
2810         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2811         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2812         m_contextMenu->AppendSeparator();
2813         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2814         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2815         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2816         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2817         m_contextMenu->AppendSeparator();
2818         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2819     }
2820     PopupMenu(m_contextMenu);
2821     return;
2822 }
2823
2824 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2825 {
2826     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttr(style));
2827 }
2828
2829 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxTextAttr& style)
2830 {
2831     return GetBuffer().SetStyle(range.ToInternal(), style);
2832 }
2833
2834 // extended style setting operation with flags including:
2835 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2836 // see richtextbuffer.h for more details.
2837
2838 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttr& style, int flags)
2839 {
2840     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2841 }
2842
2843 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2844 {
2845     return GetBuffer().SetDefaultStyle(wxTextAttr(style));
2846 }
2847
2848 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2849 {
2850     return GetBuffer().GetDefaultStyle();
2851 }
2852
2853 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2854 {
2855     return GetBuffer().GetStyle(position, style);
2856 }
2857
2858 // get the common set of styles for the range
2859 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttr& style)
2860 {
2861     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2862 }
2863
2864 /// Get the content (uncombined) attributes for this position.
2865 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2866 {
2867     return GetBuffer().GetUncombinedStyle(position, style);
2868 }
2869
2870 /// Set font, and also the buffer attributes
2871 bool wxRichTextCtrl::SetFont(const wxFont& font)
2872 {
2873     wxControl::SetFont(font);
2874
2875     wxTextAttr attr = GetBuffer().GetAttributes();
2876     attr.SetFont(font);
2877     GetBuffer().SetBasicStyle(attr);
2878
2879     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2880     Refresh(false);
2881
2882     return true;
2883 }
2884
2885 /// Transform logical to physical
2886 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2887 {
2888     wxPoint pt;
2889     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2890
2891     return pt;
2892 }
2893
2894 /// Transform physical to logical
2895 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2896 {
2897     wxPoint pt;
2898     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2899
2900     return pt;
2901 }
2902
2903 /// Position the caret
2904 void wxRichTextCtrl::PositionCaret()
2905 {
2906     if (!GetCaret())
2907         return;
2908
2909     //wxLogDebug(wxT("PositionCaret"));
2910
2911     wxRect caretRect;
2912     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2913     {
2914         wxPoint newPt = caretRect.GetPosition();
2915         wxSize newSz = caretRect.GetSize();
2916         wxPoint pt = GetPhysicalPoint(newPt);
2917         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
2918         {
2919             GetCaret()->Hide();
2920             if (GetCaret()->GetSize() != newSz)
2921                 GetCaret()->SetSize(newSz);
2922
2923             int halfSize = newSz.y/2;
2924             // If the caret is beyond the margin, hide it by moving it out of the way
2925             if (((pt.y + halfSize) < GetBuffer().GetTopMargin()) || ((pt.y + halfSize) > (GetClientSize().y - GetBuffer().GetBottomMargin())))
2926                 pt.y = -200;
2927
2928             GetCaret()->Move(pt);
2929             GetCaret()->Show();
2930         }
2931     }
2932 }
2933
2934 /// Get the caret height and position for the given character position
2935 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2936 {
2937     wxClientDC dc(this);
2938     dc.SetFont(GetFont());
2939
2940     PrepareDC(dc);
2941
2942     wxPoint pt;
2943     int height = 0;
2944
2945     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2946     {
2947         // Caret height can't be zero
2948         if (height == 0)
2949             height = dc.GetCharHeight();
2950
2951         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2952         return true;
2953     }
2954
2955     return false;
2956 }
2957
2958 /// Gets the line for the visible caret position. If the caret is
2959 /// shown at the very end of the line, it means the next character is actually
2960 /// on the following line. So let's get the line we're expecting to find
2961 /// if this is the case.
2962 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2963 {
2964     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2965     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2966     if (line)
2967     {
2968         wxRichTextRange lineRange = line->GetAbsoluteRange();
2969         if (caretPosition == lineRange.GetStart()-1 &&
2970             (para->GetRange().GetStart() != lineRange.GetStart()))
2971         {
2972             if (!m_caretAtLineStart)
2973                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2974         }
2975     }
2976     return line;
2977 }
2978
2979
2980 /// Move the caret to the given character position
2981 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2982 {
2983     if (GetBuffer().GetDirty())
2984         LayoutContent();
2985
2986     if (pos <= GetBuffer().GetRange().GetEnd())
2987     {
2988         SetCaretPosition(pos, showAtLineStart);
2989
2990         PositionCaret();
2991
2992         return true;
2993     }
2994     else
2995         return false;
2996 }
2997
2998 /// Layout the buffer: which we must do before certain operations, such as
2999 /// setting the caret position.
3000 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
3001 {
3002     if (GetBuffer().GetDirty() || onlyVisibleRect)
3003     {
3004         wxRect availableSpace(GetClientSize());
3005         if (availableSpace.width == 0)
3006             availableSpace.width = 10;
3007         if (availableSpace.height == 0)
3008             availableSpace.height = 10;
3009
3010         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
3011         if (onlyVisibleRect)
3012         {
3013             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
3014             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
3015         }
3016
3017         wxClientDC dc(this);
3018         dc.SetFont(GetFont());
3019
3020         PrepareDC(dc);
3021
3022         GetBuffer().Defragment();
3023         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
3024         GetBuffer().Layout(dc, availableSpace, flags);
3025         GetBuffer().SetDirty(false);
3026
3027         if (!IsFrozen())
3028             SetupScrollbars();
3029     }
3030
3031     return true;
3032 }
3033
3034 /// Is all of the selection bold?
3035 bool wxRichTextCtrl::IsSelectionBold()
3036 {
3037     if (HasSelection())
3038     {
3039         wxTextAttr attr;
3040         wxRichTextRange range = GetSelectionRange();
3041         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3042         attr.SetFontWeight(wxFONTWEIGHT_BOLD);
3043
3044         return HasCharacterAttributes(range, attr);
3045     }
3046     else
3047     {
3048         // If no selection, then we need to combine current style with default style
3049         // to see what the effect would be if we started typing.
3050         wxTextAttr attr;
3051         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3052
3053         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3054         if (GetStyle(pos, attr))
3055         {
3056             if (IsDefaultStyleShowing())
3057                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3058             return attr.GetFontWeight() == wxFONTWEIGHT_BOLD;
3059         }
3060     }
3061     return false;
3062 }
3063
3064 /// Is all of the selection italics?
3065 bool wxRichTextCtrl::IsSelectionItalics()
3066 {
3067     if (HasSelection())
3068     {
3069         wxRichTextRange range = GetSelectionRange();
3070         wxTextAttr attr;
3071         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3072         attr.SetFontStyle(wxFONTSTYLE_ITALIC);
3073
3074         return HasCharacterAttributes(range, attr);
3075     }
3076     else
3077     {
3078         // If no selection, then we need to combine current style with default style
3079         // to see what the effect would be if we started typing.
3080         wxTextAttr attr;
3081         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3082
3083         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3084         if (GetStyle(pos, attr))
3085         {
3086             if (IsDefaultStyleShowing())
3087                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3088             return attr.GetFontStyle() == wxFONTSTYLE_ITALIC;
3089         }
3090     }
3091     return false;
3092 }
3093
3094 /// Is all of the selection underlined?
3095 bool wxRichTextCtrl::IsSelectionUnderlined()
3096 {
3097     if (HasSelection())
3098     {
3099         wxRichTextRange range = GetSelectionRange();
3100         wxTextAttr attr;
3101         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3102         attr.SetFontUnderlined(true);
3103
3104         return HasCharacterAttributes(range, attr);
3105     }
3106     else
3107     {
3108         // If no selection, then we need to combine current style with default style
3109         // to see what the effect would be if we started typing.
3110         wxTextAttr attr;
3111         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3112         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3113
3114         if (GetStyle(pos, attr))
3115         {
3116             if (IsDefaultStyleShowing())
3117                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3118             return attr.GetFontUnderlined();
3119         }
3120     }
3121     return false;
3122 }
3123
3124 /// Apply bold to the selection
3125 bool wxRichTextCtrl::ApplyBoldToSelection()
3126 {
3127     wxTextAttr attr;
3128     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3129     attr.SetFontWeight(IsSelectionBold() ? wxFONTWEIGHT_NORMAL : wxFONTWEIGHT_BOLD);
3130
3131     if (HasSelection())
3132         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3133     else
3134     {
3135         wxRichTextAttr current = GetDefaultStyleEx();
3136         current.Apply(attr);
3137         SetAndShowDefaultStyle(current);
3138     }
3139     return true;
3140 }
3141
3142 /// Apply italic to the selection
3143 bool wxRichTextCtrl::ApplyItalicToSelection()
3144 {
3145     wxTextAttr attr;
3146     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3147     attr.SetFontStyle(IsSelectionItalics() ? wxFONTSTYLE_NORMAL : wxFONTSTYLE_ITALIC);
3148
3149     if (HasSelection())
3150         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3151     else
3152     {
3153         wxRichTextAttr current = GetDefaultStyleEx();
3154         current.Apply(attr);
3155         SetAndShowDefaultStyle(current);
3156     }
3157     return true;
3158 }
3159
3160 /// Apply underline to the selection
3161 bool wxRichTextCtrl::ApplyUnderlineToSelection()
3162 {
3163     wxTextAttr attr;
3164     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3165     attr.SetFontUnderlined(!IsSelectionUnderlined());
3166
3167     if (HasSelection())
3168         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3169     else
3170     {
3171         wxRichTextAttr current = GetDefaultStyleEx();
3172         current.Apply(attr);
3173         SetAndShowDefaultStyle(current);
3174     }
3175     return true;
3176 }
3177
3178 /// Is all of the selection aligned according to the specified flag?
3179 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
3180 {
3181     wxRichTextRange range;
3182     if (HasSelection())
3183         range = GetSelectionRange();
3184     else
3185         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
3186
3187     wxTextAttr attr;
3188     attr.SetAlignment(alignment);
3189
3190     return HasParagraphAttributes(range, attr);
3191 }
3192
3193 /// Apply alignment to the selection
3194 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
3195 {
3196     wxTextAttr attr;
3197     attr.SetAlignment(alignment);
3198     if (HasSelection())
3199         return SetStyle(GetSelectionRange(), attr);
3200     else
3201     {
3202         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
3203         if (para)
3204             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
3205     }
3206     return true;
3207 }
3208
3209 /// Apply a named style to the selection
3210 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
3211 {
3212     // Flags are defined within each definition, so only certain
3213     // attributes are applied.
3214     wxTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
3215
3216     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_RESET;
3217
3218     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
3219     {
3220         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3221
3222         wxRichTextRange range;
3223
3224         if (HasSelection())
3225             range = GetSelectionRange();
3226         else
3227         {
3228             long pos = GetAdjustedCaretPosition(GetCaretPosition());
3229             range = wxRichTextRange(pos, pos+1);
3230         }
3231
3232         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
3233     }
3234
3235     // Make sure the attr has the style name
3236     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
3237     {
3238         attr.SetParagraphStyleName(def->GetName());
3239
3240         // If applying a paragraph style, we only want the paragraph nodes to adopt these
3241         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
3242         // to change its style independently.
3243         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3244     }
3245     else
3246         attr.SetCharacterStyleName(def->GetName());
3247
3248     if (HasSelection())
3249         return SetStyleEx(GetSelectionRange(), attr, flags);
3250     else
3251     {
3252         wxRichTextAttr current = GetDefaultStyleEx();
3253         current.Apply(attr);
3254         SetAndShowDefaultStyle(current);
3255         return true;
3256     }
3257 }
3258
3259 /// Apply the style sheet to the buffer, for example if the styles have changed.
3260 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
3261 {
3262     if (!styleSheet)
3263         styleSheet = GetBuffer().GetStyleSheet();
3264     if (!styleSheet)
3265         return false;
3266
3267     if (GetBuffer().ApplyStyleSheet(styleSheet))
3268     {
3269         GetBuffer().Invalidate(wxRICHTEXT_ALL);
3270         Refresh(false);
3271         return true;
3272     }
3273     else
3274         return false;
3275 }
3276
3277 /// Sets the default style to the style under the cursor
3278 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3279 {
3280     wxTextAttr attr;
3281     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3282
3283     // If at the start of a paragraph, use the next position.
3284     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3285
3286     if (GetUncombinedStyle(pos, attr))
3287     {
3288         SetDefaultStyle(attr);
3289         return true;
3290     }
3291
3292     return false;
3293 }
3294
3295 /// Returns the first visible position in the current view
3296 long wxRichTextCtrl::GetFirstVisiblePosition() const
3297 {
3298     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3299     if (line)
3300         return line->GetAbsoluteRange().GetStart();
3301     else
3302         return 0;
3303 }
3304
3305 /// Get the first visible point in the window
3306 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3307 {
3308     int ppuX, ppuY;
3309     int startXUnits, startYUnits;
3310
3311     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3312     GetViewStart(& startXUnits, & startYUnits);
3313
3314     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3315 }
3316
3317 /// The adjusted caret position is the character position adjusted to take
3318 /// into account whether we're at the start of a paragraph, in which case
3319 /// style information should be taken from the next position, not current one.
3320 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3321 {
3322     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3323
3324     if (para && (caretPos+1 == para->GetRange().GetStart()))
3325         caretPos ++;
3326     return caretPos;
3327 }
3328
3329 /// Get/set the selection range in character positions. -1, -1 means no selection.
3330 /// The range is in API convention, i.e. a single character selection is denoted
3331 /// by (n, n+1)
3332 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3333 {
3334     wxRichTextRange range = GetInternalSelectionRange();
3335     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3336         range.SetEnd(range.GetEnd() + 1);
3337     return range;
3338 }
3339
3340 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3341 {
3342     wxRichTextRange range1(range);
3343     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3344         range1.SetEnd(range1.GetEnd() - 1);
3345
3346     wxASSERT( range1.GetStart() > range1.GetEnd() );
3347
3348     SetInternalSelectionRange(range1);
3349 }
3350
3351 /// Set list style
3352 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3353 {
3354     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3355 }
3356
3357 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3358 {
3359     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3360 }
3361
3362 /// Clear list for given range
3363 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3364 {
3365     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3366 }
3367
3368 /// Number/renumber any list elements in the given range
3369 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3370 {
3371     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3372 }
3373
3374 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3375 {
3376     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3377 }
3378
3379 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3380 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3381 {
3382     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3383 }
3384
3385 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3386 {
3387     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3388 }
3389
3390 /// Deletes the content in the given range
3391 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3392 {
3393     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3394 }
3395
3396 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3397 {
3398     if (sm_availableFontNames.GetCount() == 0)
3399     {
3400         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3401         sm_availableFontNames.Sort();
3402     }
3403     return sm_availableFontNames;
3404 }
3405
3406 void wxRichTextCtrl::ClearAvailableFontNames()
3407 {
3408     sm_availableFontNames.Clear();
3409 }
3410
3411 void wxRichTextCtrl::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
3412 {
3413     //wxLogDebug(wxT("wxRichTextCtrl::OnSysColourChanged"));
3414
3415     wxTextAttrEx basicStyle = GetBasicStyle();
3416     basicStyle.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
3417     SetBasicStyle(basicStyle);
3418     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
3419
3420     Refresh();
3421 }
3422
3423 // Refresh the area affected by a selection change
3424 bool wxRichTextCtrl::RefreshForSelectionChange(const wxRichTextRange& oldSelection, const wxRichTextRange& newSelection)
3425 {
3426     // Calculate the refresh rectangle - just the affected lines
3427     long firstPos, lastPos;
3428     if (oldSelection.GetStart() == -2 && newSelection.GetStart() != -2)
3429     {
3430         firstPos = newSelection.GetStart();
3431         lastPos = newSelection.GetEnd();
3432     }
3433     else if (oldSelection.GetStart() != -2 && newSelection.GetStart() == -2)
3434     {
3435         firstPos = oldSelection.GetStart();
3436         lastPos = oldSelection.GetEnd();
3437     }
3438     else if (oldSelection.GetStart() == -2 && newSelection.GetStart() == -2)
3439     {
3440         return false;
3441     }
3442     else
3443     {
3444         firstPos = wxMin(oldSelection.GetStart(), newSelection.GetStart());
3445         lastPos = wxMax(oldSelection.GetEnd(), newSelection.GetEnd());
3446     }
3447
3448     wxRichTextLine* firstLine = GetBuffer().GetLineAtPosition(firstPos);
3449     wxRichTextLine* lastLine = GetBuffer().GetLineAtPosition(lastPos);
3450
3451     if (firstLine && lastLine)
3452     {
3453         wxSize clientSize = GetClientSize();
3454         wxPoint pt1 = GetPhysicalPoint(firstLine->GetAbsolutePosition());
3455         wxPoint pt2 = GetPhysicalPoint(lastLine->GetAbsolutePosition()) + wxPoint(0, lastLine->GetSize().y);
3456
3457         pt1.x = 0;
3458         pt1.y = wxMax(0, pt1.y);
3459         pt2.x = 0;
3460         pt2.y = wxMin(clientSize.y, pt2.y);
3461
3462         wxRect rect(pt1, wxSize(clientSize.x, pt2.y - pt1.y));
3463         RefreshRect(rect, false);
3464     }
3465     else
3466         Refresh(false);
3467
3468     return true;
3469 }
3470
3471 #if wxRICHTEXT_USE_OWN_CARET
3472
3473 // ----------------------------------------------------------------------------
3474 // initialization and destruction
3475 // ----------------------------------------------------------------------------
3476
3477 void wxRichTextCaret::Init()
3478 {
3479     m_hasFocus = true;
3480
3481     m_xOld =
3482     m_yOld = -1;
3483     m_richTextCtrl = NULL;
3484     m_needsUpdate = false;
3485 }
3486
3487 wxRichTextCaret::~wxRichTextCaret()
3488 {
3489 }
3490
3491 // ----------------------------------------------------------------------------
3492 // showing/hiding/moving the caret (base class interface)
3493 // ----------------------------------------------------------------------------
3494
3495 void wxRichTextCaret::DoShow()
3496 {
3497     Refresh();
3498 }
3499
3500 void wxRichTextCaret::DoHide()
3501 {
3502     Refresh();
3503 }
3504
3505 void wxRichTextCaret::DoMove()
3506 {
3507     if (IsVisible())
3508     {
3509         Refresh();
3510
3511         if (m_xOld != -1 && m_yOld != -1)
3512         {
3513             if (m_richTextCtrl)
3514             {
3515                 wxRect rect(GetPosition(), GetSize());
3516                 m_richTextCtrl->RefreshRect(rect, false);
3517             }
3518         }
3519     }
3520
3521     m_xOld = m_x;
3522     m_yOld = m_y;
3523 }
3524
3525 void wxRichTextCaret::DoSize()
3526 {
3527     int countVisible = m_countVisible;
3528     if (countVisible > 0)
3529     {
3530         m_countVisible = 0;
3531         DoHide();
3532     }
3533
3534     if (countVisible > 0)
3535     {
3536         m_countVisible = countVisible;
3537         DoShow();
3538     }
3539 }
3540
3541 // ----------------------------------------------------------------------------
3542 // handling the focus
3543 // ----------------------------------------------------------------------------
3544
3545 void wxRichTextCaret::OnSetFocus()
3546 {
3547     m_hasFocus = true;
3548
3549     if ( IsVisible() )
3550         Refresh();
3551 }
3552
3553 void wxRichTextCaret::OnKillFocus()
3554 {
3555     m_hasFocus = false;
3556 }
3557
3558 // ----------------------------------------------------------------------------
3559 // drawing the caret
3560 // ----------------------------------------------------------------------------
3561
3562 void wxRichTextCaret::Refresh()
3563 {
3564     if (m_richTextCtrl)
3565     {
3566         wxRect rect(GetPosition(), GetSize());
3567         m_richTextCtrl->RefreshRect(rect, false);
3568     }
3569 }
3570
3571 void wxRichTextCaret::DoDraw(wxDC *dc)
3572 {
3573     dc->SetPen( *wxBLACK_PEN );
3574
3575     dc->SetBrush(*(m_hasFocus ? wxBLACK_BRUSH : wxTRANSPARENT_BRUSH));
3576     dc->SetPen(*wxBLACK_PEN);
3577
3578     // VZ: unfortunately, the rectangle comes out a pixel smaller when this is
3579     //     done under wxGTK - no idea why
3580     //dc->SetLogicalFunction(wxINVERT);
3581
3582     wxPoint pt(m_x, m_y);
3583
3584     if (m_richTextCtrl)
3585     {
3586         pt = m_richTextCtrl->GetLogicalPoint(pt);
3587     }
3588     dc->DrawRectangle(pt.x, pt.y, m_width, m_height);
3589 }
3590 #endif
3591     // wxRICHTEXT_USE_OWN_CARET
3592
3593 #endif
3594     // wxUSE_RICHTEXT