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, wxTextCtrlBase )
 124
 125 IMPLEMENT_DYNAMIC_CLASS( wxRichTextEvent, wxNotifyEvent )
 126
 127 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxTextCtrlBase )
 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     style |= wxVSCROLL;
 200
 201     if (!wxTextCtrlBase::Create(parent, id, pos, size,
 202                            style|wxFULL_REPAINT_ON_RESIZE,
 203                            validator, name))
 204         return false;
 205
 206     if (!GetFont().Ok())
 207     {
 208         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 209     }
 210
 211     // No physical scrolling, so we can preserve margins
 212     EnableScrolling(false, false);
 213
 214     if (style & wxTE_READONLY)
 215         SetEditable(false);
 216
 217     // The base attributes must all have default values
 218     wxTextAttr attributes;
 219     attributes.SetFont(GetFont());
 220     attributes.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
 221     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 222     attributes.SetLineSpacing(10);
 223     attributes.SetParagraphSpacingAfter(10);
 224     attributes.SetParagraphSpacingBefore(0);
 225
 226     SetBasicStyle(attributes);
 227
 228     // The default attributes will be merged with base attributes, so
 229     // can be empty to begin with
 230     wxTextAttr defaultAttributes;
 231     SetDefaultStyle(defaultAttributes);
 232
 233     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 234     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 235
 236     GetBuffer().Reset();
 237     GetBuffer().SetRichTextCtrl(this);
 238
 239 #if wxRICHTEXT_USE_OWN_CARET
 240     SetCaret(new wxRichTextCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 241 #else
 242     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 243 #endif
 244
 245     // Tell the sizers to use the given or best size
 246     SetInitialSize(size);
 247
 248 #if wxRICHTEXT_BUFFERED_PAINTING
 249     // Create a buffer
 250     RecreateBuffer(size);
 251 #endif
 252
 253     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 254     m_urlCursor = wxCursor(wxCURSOR_HAND);
 255
 256     SetCursor(m_textCursor);
 257
 258     if (!value.IsEmpty())
 259         SetValue(value);
 260
 261     GetBuffer().AddEventHandler(this);
 262
 263     // Accelerators
 264     wxAcceleratorEntry entries[6];
 265
 266     entries[0].Set(wxACCEL_CMD,   (int) 'C',       wxID_COPY);
 267     entries[1].Set(wxACCEL_CMD,   (int) 'X',       wxID_CUT);
 268     entries[2].Set(wxACCEL_CMD,   (int) 'V',       wxID_PASTE);
 269     entries[3].Set(wxACCEL_CMD,   (int) 'A',       wxID_SELECTALL);
 270     entries[4].Set(wxACCEL_CMD,   (int) 'Z',       wxID_UNDO);
 271     entries[5].Set(wxACCEL_CMD,   (int) 'Y',       wxID_REDO);
 272
 273     wxAcceleratorTable accel(6, entries);
 274     SetAcceleratorTable(accel);
 275
 276     return true;
 277 }
 278
 279 wxRichTextCtrl::~wxRichTextCtrl()
 280 {
 281     GetBuffer().RemoveEventHandler(this);
 282
 283     delete m_contextMenu;
 284 }
 285
 286 /// Member initialisation
 287 void wxRichTextCtrl::Init()
 288 {
 289     m_contextMenu = NULL;
 290     m_caret = NULL;
 291     m_caretPosition = -1;
 292     m_selectionRange.SetRange(-2, -2);
 293     m_selectionAnchor = -2;
 294     m_editable = true;
 295     m_caretAtLineStart = false;
 296     m_dragging = false;
 297     m_fullLayoutRequired = false;
 298     m_fullLayoutTime = 0;
 299     m_fullLayoutSavedPosition = 0;
 300     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 301     m_caretPositionForDefaultStyle = -2;
 302 }
 303
 304 void wxRichTextCtrl::DoThaw()
 305 {
 306     if (GetBuffer().GetDirty())
 307         LayoutContent();
 308     else
 309         SetupScrollbars();
 310
 311     wxWindow::DoThaw();
 312 }
 313
 314 /// Clear all text
 315 void wxRichTextCtrl::Clear()
 316 {
 317     m_buffer.ResetAndClearCommands();
 318     m_buffer.SetDirty(true);
 319     m_caretPosition = -1;
 320     m_caretPositionForDefaultStyle = -2;
 321     m_caretAtLineStart = false;
 322     m_selectionRange.SetRange(-2, -2);
 323
 324     Scroll(0,0);
 325
 326     if (!IsFrozen())
 327     {
 328         LayoutContent();
 329         Refresh(false);
 330     }
 331
 332     wxTextCtrl::SendTextUpdatedEvent(this);
 333 }
 334
 335 /// Painting
 336 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 337 {
 338 #if !wxRICHTEXT_USE_OWN_CARET
 339     if (GetCaret() && !IsFrozen())
 340         GetCaret()->Hide();
 341 #endif
 342
 343     {
 344 #if wxRICHTEXT_BUFFERED_PAINTING
 345         wxBufferedPaintDC dc(this, m_bufferBitmap);
 346 #else
 347         wxPaintDC dc(this);
 348 #endif
 349
 350         if (IsFrozen())
 351             return;
 352
 353         PrepareDC(dc);
 354
 355         dc.SetFont(GetFont());
 356
 357         // Paint the background
 358         PaintBackground(dc);
 359
 360         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 361
 362         wxRect drawingArea(GetUpdateRegion().GetBox());
 363         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 364
 365         wxRect availableSpace(GetClientSize());
 366         if (GetBuffer().GetDirty())
 367         {
 368             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 369             GetBuffer().SetDirty(false);
 370             SetupScrollbars();
 371         }
 372
 373         wxRect clipRect(availableSpace);
 374         clipRect.x += GetBuffer().GetLeftMargin();
 375         clipRect.y += GetBuffer().GetTopMargin();
 376         clipRect.width -= (GetBuffer().GetLeftMargin() + GetBuffer().GetRightMargin());
 377         clipRect.height -= (GetBuffer().GetTopMargin() + GetBuffer().GetBottomMargin());
 378         clipRect.SetPosition(GetLogicalPoint(clipRect.GetPosition()));
 379         dc.SetClippingRegion(clipRect);
 380
 381         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 382
 383         dc.DestroyClippingRegion();
 384
 385 #if wxRICHTEXT_USE_OWN_CARET
 386         if (GetCaret()->IsVisible())
 387         {
 388             ((wxRichTextCaret*) GetCaret())->DoDraw(& dc);
 389         }
 390 #endif
 391     }
 392
 393 #if !wxRICHTEXT_USE_OWN_CARET
 394     if (GetCaret())
 395         GetCaret()->Show();
 396     PositionCaret();
 397 #endif
 398 }
 399
 400 // Empty implementation, to prevent flicker
 401 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 402 {
 403 }
 404
 405 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 406 {
 407     if (GetCaret())
 408     {
 409 #if !wxRICHTEXT_USE_OWN_CARET
 410         PositionCaret();
 411 #endif
 412         GetCaret()->Show();
 413     }
 414
 415 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 416     // Work around dropouts when control is focused
 417     if (!IsFrozen())
 418     {
 419         Refresh(false);
 420     }
 421 #endif
 422 }
 423
 424 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 425 {
 426     if (GetCaret())
 427         GetCaret()->Hide();
 428
 429 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 430     // Work around dropouts when control is focused
 431     if (!IsFrozen())
 432     {
 433         Refresh(false);
 434     }
 435 #endif
 436 }
 437
 438 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 439 {
 440     m_dragging = false;
 441 }
 442
 443 /// Left-click
 444 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 445 {
 446     SetFocus();
 447
 448     wxClientDC dc(this);
 449     PrepareDC(dc);
 450     dc.SetFont(GetFont());
 451
 452     long position = 0;
 453     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 454
 455     if (hit != wxRICHTEXT_HITTEST_NONE)
 456     {
 457         m_dragStart = event.GetLogicalPosition(dc);
 458         m_dragging = true;
 459         CaptureMouse();
 460
 461         bool caretAtLineStart = false;
 462
 463         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 464         {
 465             // If we're at the start of a line (but not first in para)
 466             // then we should keep the caret showing at the start of the line
 467             // by showing the m_caretAtLineStart flag.
 468             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 469             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 470
 471             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 472                 caretAtLineStart = true;
 473             position --;
 474         }
 475
 476         long oldCaretPos = m_caretPosition;
 477
 478         MoveCaret(position, caretAtLineStart);
 479         SetDefaultStyleToCursorStyle();
 480
 481         if (event.ShiftDown())
 482         {
 483             if (m_selectionRange.GetStart() == -2)
 484                 ExtendSelection(oldCaretPos, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 485             else
 486                 ExtendSelection(m_caretPosition, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 487         }
 488         else
 489             SelectNone();
 490     }
 491
 492     event.Skip();
 493 }
 494
 495 /// Left-up
 496 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 497 {
 498     if (m_dragging)
 499     {
 500         m_dragging = false;
 501         if (GetCapture() == this)
 502             ReleaseMouse();
 503
 504         // See if we clicked on a URL
 505         wxClientDC dc(this);
 506         PrepareDC(dc);
 507         dc.SetFont(GetFont());
 508
 509         long position = 0;
 510         wxPoint logicalPt = event.GetLogicalPosition(dc);
 511         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 512
 513         if ((hit != wxRICHTEXT_HITTEST_NONE) && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 514         {
 515             wxRichTextEvent cmdEvent(
 516                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 517                 GetId());
 518             cmdEvent.SetEventObject(this);
 519             cmdEvent.SetPosition(m_caretPosition+1);
 520
 521             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 522             {
 523                 wxTextAttr attr;
 524                 if (GetStyle(position, attr))
 525                 {
 526                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 527                     {
 528                         wxString urlTarget = attr.GetURL();
 529                         if (!urlTarget.IsEmpty())
 530                         {
 531                             wxMouseEvent mouseEvent(event);
 532
 533                             long startPos = 0, endPos = 0;
 534                             wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 535                             if (obj)
 536                             {
 537                                 startPos = obj->GetRange().GetStart();
 538                                 endPos = obj->GetRange().GetEnd();
 539                             }
 540
 541                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 542                             InitCommandEvent(urlEvent);
 543
 544                             urlEvent.SetString(urlTarget);
 545
 546                             GetEventHandler()->ProcessEvent(urlEvent);
 547                         }
 548                     }
 549                 }
 550             }
 551         }
 552     }
 553 }
 554
 555 /// Left-click
 556 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 557 {
 558     wxClientDC dc(this);
 559     PrepareDC(dc);
 560     dc.SetFont(GetFont());
 561
 562     long position = 0;
 563     wxPoint logicalPt = event.GetLogicalPosition(dc);
 564     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 565
 566     // See if we need to change the cursor
 567
 568     {
 569         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 570         {
 571             wxTextAttr attr;
 572             if (GetStyle(position, attr))
 573             {
 574                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 575                 {
 576                     SetCursor(m_urlCursor);
 577                 }
 578                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 579                 {
 580                     SetCursor(m_textCursor);
 581                 }
 582             }
 583         }
 584         else
 585             SetCursor(m_textCursor);
 586     }
 587
 588     if (!event.Dragging())
 589     {
 590         event.Skip();
 591         return;
 592     }
 593
 594     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 595     {
 596         // TODO: test closeness
 597
 598         bool caretAtLineStart = false;
 599
 600         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 601         {
 602             // If we're at the start of a line (but not first in para)
 603             // then we should keep the caret showing at the start of the line
 604             // by showing the m_caretAtLineStart flag.
 605             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 606             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 607
 608             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 609                 caretAtLineStart = true;
 610             position --;
 611         }
 612
 613         if (m_caretPosition != position)
 614         {
 615             ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 616
 617             MoveCaret(position, caretAtLineStart);
 618             SetDefaultStyleToCursorStyle();
 619         }
 620     }
 621 }
 622
 623 /// Right-click
 624 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 625 {
 626     SetFocus();
 627
 628     wxRichTextEvent cmdEvent(
 629         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 630         GetId());
 631     cmdEvent.SetEventObject(this);
 632     cmdEvent.SetPosition(m_caretPosition+1);
 633
 634     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 635         event.Skip();
 636 }
 637
 638 /// Left-double-click
 639 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 640 {
 641     wxRichTextEvent cmdEvent(
 642         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
 643         GetId());
 644     cmdEvent.SetEventObject(this);
 645     cmdEvent.SetPosition(m_caretPosition+1);
 646
 647     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 648     {
 649         SelectWord(GetCaretPosition()+1);
 650     }
 651 }
 652
 653 /// Middle-click
 654 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 655 {
 656     wxRichTextEvent cmdEvent(
 657         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
 658         GetId());
 659     cmdEvent.SetEventObject(this);
 660     cmdEvent.SetPosition(m_caretPosition+1);
 661
 662     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 663         event.Skip();
 664 }
 665
 666 /// Key press
 667 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 668 {
 669     int flags = 0;
 670     if (event.CmdDown())
 671         flags |= wxRICHTEXT_CTRL_DOWN;
 672     if (event.ShiftDown())
 673         flags |= wxRICHTEXT_SHIFT_DOWN;
 674     if (event.AltDown())
 675         flags |= wxRICHTEXT_ALT_DOWN;
 676
 677     if (event.GetEventType() == wxEVT_KEY_DOWN)
 678     {
 679         if (event.GetKeyCode() == WXK_LEFT ||
 680             event.GetKeyCode() == WXK_RIGHT ||
 681             event.GetKeyCode() == WXK_UP ||
 682             event.GetKeyCode() == WXK_DOWN ||
 683             event.GetKeyCode() == WXK_HOME ||
 684             event.GetKeyCode() == WXK_PAGEUP ||
 685             event.GetKeyCode() == WXK_PAGEDOWN ||
 686             event.GetKeyCode() == WXK_END ||
 687
 688             event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 689             event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 690             event.GetKeyCode() == WXK_NUMPAD_UP ||
 691             event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 692             event.GetKeyCode() == WXK_NUMPAD_HOME ||
 693             event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 694             event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 695             event.GetKeyCode() == WXK_NUMPAD_END)
 696         {
 697             KeyboardNavigate(event.GetKeyCode(), flags);
 698             return;
 699         }
 700
 701         long keycode = event.GetKeyCode();
 702         switch ( keycode )
 703         {
 704             case WXK_ESCAPE:
 705             case WXK_START:
 706             case WXK_LBUTTON:
 707             case WXK_RBUTTON:
 708             case WXK_CANCEL:
 709             case WXK_MBUTTON:
 710             case WXK_CLEAR:
 711             case WXK_SHIFT:
 712             case WXK_ALT:
 713             case WXK_CONTROL:
 714             case WXK_MENU:
 715             case WXK_PAUSE:
 716             case WXK_CAPITAL:
 717             case WXK_END:
 718             case WXK_HOME:
 719             case WXK_LEFT:
 720             case WXK_UP:
 721             case WXK_RIGHT:
 722             case WXK_DOWN:
 723             case WXK_SELECT:
 724             case WXK_PRINT:
 725             case WXK_EXECUTE:
 726             case WXK_SNAPSHOT:
 727             case WXK_INSERT:
 728             case WXK_HELP:
 729             case WXK_F1:
 730             case WXK_F2:
 731             case WXK_F3:
 732             case WXK_F4:
 733             case WXK_F5:
 734             case WXK_F6:
 735             case WXK_F7:
 736             case WXK_F8:
 737             case WXK_F9:
 738             case WXK_F10:
 739             case WXK_F11:
 740             case WXK_F12:
 741             case WXK_F13:
 742             case WXK_F14:
 743             case WXK_F15:
 744             case WXK_F16:
 745             case WXK_F17:
 746             case WXK_F18:
 747             case WXK_F19:
 748             case WXK_F20:
 749             case WXK_F21:
 750             case WXK_F22:
 751             case WXK_F23:
 752             case WXK_F24:
 753             case WXK_NUMLOCK:
 754             case WXK_SCROLL:
 755             case WXK_PAGEUP:
 756             case WXK_PAGEDOWN:
 757             case WXK_NUMPAD_F1:
 758             case WXK_NUMPAD_F2:
 759             case WXK_NUMPAD_F3:
 760             case WXK_NUMPAD_F4:
 761             case WXK_NUMPAD_HOME:
 762             case WXK_NUMPAD_LEFT:
 763             case WXK_NUMPAD_UP:
 764             case WXK_NUMPAD_RIGHT:
 765             case WXK_NUMPAD_DOWN:
 766             case WXK_NUMPAD_PAGEUP:
 767             case WXK_NUMPAD_PAGEDOWN:
 768             case WXK_NUMPAD_END:
 769             case WXK_NUMPAD_BEGIN:
 770             case WXK_NUMPAD_INSERT:
 771             case WXK_NUMPAD_DELETE:
 772             case WXK_WINDOWS_LEFT:
 773             {
 774                 return;
 775             }
 776             default:
 777             {
 778             }
 779         }
 780
 781         // Must process this before translation, otherwise it's translated into a WXK_DELETE event.
 782         if (event.CmdDown() && event.GetKeyCode() == WXK_BACK)
 783         {
 784             BeginBatchUndo(_("Delete Text"));
 785
 786             long newPos = m_caretPosition;
 787
 788             bool processed = DeleteSelectedContent(& newPos);
 789
 790             // Submit range in character positions, which are greater than caret positions,
 791             // so subtract 1 for deleted character and add 1 for conversion to character position.
 792             if (newPos > -1)
 793             {
 794                 if (event.CmdDown())
 795                 {
 796                     long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 797                     if (pos < newPos)
 798                     {
 799                         GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this);
 800                         processed = true;
 801                     }
 802                 }
 803
 804                 if (!processed)
 805                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this);
 806             }
 807
 808             EndBatchUndo();
 809
 810             if (GetLastPosition() == -1)
 811             {
 812                 GetBuffer().Reset();
 813
 814                 m_caretPosition = -1;
 815                 PositionCaret();
 816                 SetDefaultStyleToCursorStyle();
 817             }
 818
 819             ScrollIntoView(m_caretPosition, WXK_LEFT);
 820
 821             wxRichTextEvent cmdEvent(
 822                 wxEVT_COMMAND_RICHTEXT_DELETE,
 823                 GetId());
 824             cmdEvent.SetEventObject(this);
 825             cmdEvent.SetFlags(flags);
 826             cmdEvent.SetPosition(m_caretPosition+1);
 827             GetEventHandler()->ProcessEvent(cmdEvent);
 828
 829             Update();
 830         }
 831         else
 832             event.Skip();
 833
 834         return;
 835     }
 836
 837     // all the other keys modify the controls contents which shouldn't be
 838     // possible if we're read-only
 839     if ( !IsEditable() )
 840     {
 841         event.Skip();
 842         return;
 843     }
 844
 845     if (event.GetKeyCode() == WXK_RETURN)
 846     {
 847         BeginBatchUndo(_("Insert Text"));
 848
 849         long newPos = m_caretPosition;
 850
 851         DeleteSelectedContent(& newPos);
 852
 853         if (event.ShiftDown())
 854         {
 855             wxString text;
 856             text = wxRichTextLineBreakChar;
 857             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 858             m_caretAtLineStart = true;
 859             PositionCaret();
 860         }
 861         else
 862             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE|wxRICHTEXT_INSERT_INTERACTIVE);
 863
 864         EndBatchUndo();
 865         SetDefaultStyleToCursorStyle();
 866
 867         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 868
 869         wxRichTextEvent cmdEvent(
 870             wxEVT_COMMAND_RICHTEXT_RETURN,
 871             GetId());
 872         cmdEvent.SetEventObject(this);
 873         cmdEvent.SetFlags(flags);
 874         cmdEvent.SetPosition(newPos+1);
 875
 876         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 877         {
 878             // Generate conventional event
 879             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 880             InitCommandEvent(textEvent);
 881
 882             GetEventHandler()->ProcessEvent(textEvent);
 883         }
 884         Update();
 885     }
 886     else if (event.GetKeyCode() == WXK_BACK)
 887     {
 888         BeginBatchUndo(_("Delete Text"));
 889
 890         long newPos = m_caretPosition;
 891
 892         bool processed = DeleteSelectedContent(& newPos);
 893
 894         // Submit range in character positions, which are greater than caret positions,
 895         // so subtract 1 for deleted character and add 1 for conversion to character position.
 896         if (newPos > -1)
 897         {
 898             if (event.CmdDown())
 899             {
 900                 long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 901                 if (pos < newPos)
 902                 {
 903                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this);
 904                     processed = true;
 905                 }
 906             }
 907
 908             if (!processed)
 909                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this);
 910         }
 911
 912         EndBatchUndo();
 913
 914         if (GetLastPosition() == -1)
 915         {
 916             GetBuffer().Reset();
 917
 918             m_caretPosition = -1;
 919             PositionCaret();
 920             SetDefaultStyleToCursorStyle();
 921         }
 922
 923         ScrollIntoView(m_caretPosition, WXK_LEFT);
 924
 925         wxRichTextEvent cmdEvent(
 926             wxEVT_COMMAND_RICHTEXT_DELETE,
 927             GetId());
 928         cmdEvent.SetEventObject(this);
 929         cmdEvent.SetFlags(flags);
 930         cmdEvent.SetPosition(m_caretPosition+1);
 931         GetEventHandler()->ProcessEvent(cmdEvent);
 932
 933         Update();
 934     }
 935     else if (event.GetKeyCode() == WXK_DELETE)
 936     {
 937         BeginBatchUndo(_("Delete Text"));
 938
 939         long newPos = m_caretPosition;
 940
 941         bool processed = DeleteSelectedContent(& newPos);
 942
 943         // Submit range in character positions, which are greater than caret positions,
 944         if (newPos < GetBuffer().GetRange().GetEnd()+1)
 945         {
 946             if (event.CmdDown())
 947             {
 948                 long pos = wxRichTextCtrl::FindNextWordPosition(1);
 949                 if (pos != -1 && (pos > newPos))
 950                 {
 951                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos+1, pos), this);
 952                     processed = true;
 953                 }
 954             }
 955
 956             if (!processed)
 957                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos+1, newPos+1), this);
 958         }
 959
 960         EndBatchUndo();
 961
 962         if (GetLastPosition() == -1)
 963         {
 964             GetBuffer().Reset();
 965
 966             m_caretPosition = -1;
 967             PositionCaret();
 968             SetDefaultStyleToCursorStyle();
 969         }
 970
 971         wxRichTextEvent cmdEvent(
 972             wxEVT_COMMAND_RICHTEXT_DELETE,
 973             GetId());
 974         cmdEvent.SetEventObject(this);
 975         cmdEvent.SetFlags(flags);
 976         cmdEvent.SetPosition(m_caretPosition+1);
 977         GetEventHandler()->ProcessEvent(cmdEvent);
 978
 979         Update();
 980     }
 981     else
 982     {
 983         long keycode = event.GetKeyCode();
 984         switch ( keycode )
 985         {
 986             case WXK_ESCAPE:
 987             {
 988                 event.Skip();
 989                 return;
 990             }
 991
 992             default:
 993             {
 994 #ifdef __WXMAC__
 995                 if (event.CmdDown())
 996 #else
 997                 if (event.CmdDown() || event.AltDown())
 998 #endif
 999                 {
1000                     event.Skip();
1001                     return;
1002                 }
1003
1004                 wxRichTextEvent cmdEvent(
1005                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
1006                     GetId());
1007                 cmdEvent.SetEventObject(this);
1008                 cmdEvent.SetFlags(flags);
1009 #if wxUSE_UNICODE
1010                 cmdEvent.SetCharacter(event.GetUnicodeKey());
1011 #else
1012                 cmdEvent.SetCharacter((wxChar) keycode);
1013 #endif
1014                 cmdEvent.SetPosition(m_caretPosition+1);
1015
1016                 if (keycode == wxT('\t'))
1017                 {
1018                     // See if we need to promote or demote the selection or paragraph at the cursor
1019                     // position, instead of inserting a tab.
1020                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
1021                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
1022                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
1023                     {
1024                         wxRichTextRange range;
1025                         if (HasSelection())
1026                             range = GetSelectionRange();
1027                         else
1028                             range = para->GetRange().FromInternal();
1029
1030                         int promoteBy = event.ShiftDown() ? 1 : -1;
1031
1032                         PromoteList(promoteBy, range, NULL);
1033
1034                         GetEventHandler()->ProcessEvent(cmdEvent);
1035
1036                         return;
1037                     }
1038                 }
1039
1040                 BeginBatchUndo(_("Insert Text"));
1041
1042                 long newPos = m_caretPosition;
1043                 DeleteSelectedContent(& newPos);
1044
1045 #if wxUSE_UNICODE
1046                 wxString str = event.GetUnicodeKey();
1047 #else
1048                 wxString str = (wxChar) event.GetKeyCode();
1049 #endif
1050                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
1051
1052                 EndBatchUndo();
1053
1054                 SetDefaultStyleToCursorStyle();
1055                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
1056
1057                 GetEventHandler()->ProcessEvent(cmdEvent);
1058
1059                 Update();
1060             }
1061         }
1062     }
1063 }
1064
1065 /// Delete content if there is a selection, e.g. when pressing a key.
1066 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
1067 {
1068     if (HasSelection())
1069     {
1070         long pos = m_selectionRange.GetStart();
1071         GetBuffer().DeleteRangeWithUndo(m_selectionRange, this);
1072         m_selectionRange.SetRange(-2, -2);
1073
1074         if (newPos)
1075             *newPos = pos-1;
1076         return true;
1077     }
1078     else
1079         return false;
1080 }
1081
1082 /// Keyboard navigation
1083
1084 /*
1085
1086 Left:       left one character
1087 Right:      right one character
1088 Up:         up one line
1089 Down:       down one line
1090 Ctrl-Left:  left one word
1091 Ctrl-Right: right one word
1092 Ctrl-Up:    previous paragraph start
1093 Ctrl-Down:  next start of paragraph
1094 Home:       start of line
1095 End:        end of line
1096 Ctrl-Home:  start of document
1097 Ctrl-End:   end of document
1098 Page-Up:    Up a screen
1099 Page-Down:  Down a screen
1100
1101 Maybe:
1102
1103 Ctrl-Alt-PgUp: Start of window
1104 Ctrl-Alt-PgDn: End of window
1105 F8:         Start selection mode
1106 Esc:        End selection mode
1107
1108 Adding Shift does the above but starts/extends selection.
1109
1110
1111  */
1112
1113 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
1114 {
1115     bool success = false;
1116
1117     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
1118     {
1119         if (flags & wxRICHTEXT_CTRL_DOWN)
1120             success = WordRight(1, flags);
1121         else
1122             success = MoveRight(1, flags);
1123     }
1124     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
1125     {
1126         if (flags & wxRICHTEXT_CTRL_DOWN)
1127             success = WordLeft(1, flags);
1128         else
1129             success = MoveLeft(1, flags);
1130     }
1131     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
1132     {
1133         if (flags & wxRICHTEXT_CTRL_DOWN)
1134             success = MoveToParagraphStart(flags);
1135         else
1136             success = MoveUp(1, flags);
1137     }
1138     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
1139     {
1140         if (flags & wxRICHTEXT_CTRL_DOWN)
1141             success = MoveToParagraphEnd(flags);
1142         else
1143             success = MoveDown(1, flags);
1144     }
1145     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
1146     {
1147         success = PageUp(1, flags);
1148     }
1149     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1150     {
1151         success = PageDown(1, flags);
1152     }
1153     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
1154     {
1155         if (flags & wxRICHTEXT_CTRL_DOWN)
1156             success = MoveHome(flags);
1157         else
1158             success = MoveToLineStart(flags);
1159     }
1160     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
1161     {
1162         if (flags & wxRICHTEXT_CTRL_DOWN)
1163             success = MoveEnd(flags);
1164         else
1165             success = MoveToLineEnd(flags);
1166     }
1167
1168     if (success)
1169     {
1170         ScrollIntoView(m_caretPosition, keyCode);
1171         SetDefaultStyleToCursorStyle();
1172     }
1173
1174     return success;
1175 }
1176
1177 /// Extend the selection. Selections are in caret positions.
1178 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
1179 {
1180     if (flags & wxRICHTEXT_SHIFT_DOWN)
1181     {
1182         if (oldPos == newPos)
1183             return false;
1184
1185         wxRichTextRange oldSelection = m_selectionRange;
1186
1187         // If not currently selecting, start selecting
1188         if (m_selectionRange.GetStart() == -2)
1189         {
1190             m_selectionAnchor = oldPos;
1191
1192             if (oldPos > newPos)
1193                 m_selectionRange.SetRange(newPos+1, oldPos);
1194             else
1195                 m_selectionRange.SetRange(oldPos+1, newPos);
1196         }
1197         else
1198         {
1199             // Always ensure that the selection range start is greater than
1200             // the end.
1201             if (newPos > m_selectionAnchor)
1202                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
1203             else if (newPos == m_selectionAnchor)
1204                 m_selectionRange = wxRichTextRange(-2, -2);
1205             else
1206                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
1207         }
1208
1209         RefreshForSelectionChange(oldSelection, m_selectionRange);
1210
1211         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
1212         {
1213             wxLogDebug(wxT("Strange selection range"));
1214         }
1215
1216         return true;
1217     }
1218     else
1219         return false;
1220 }
1221
1222 /// Scroll into view, returning true if we scrolled.
1223 /// This takes a _caret_ position.
1224 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1225 {
1226     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1227
1228     if (!line)
1229         return false;
1230
1231     int ppuX, ppuY;
1232     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1233
1234     int startXUnits, startYUnits;
1235     GetViewStart(& startXUnits, & startYUnits);
1236     int startY = startYUnits * ppuY;
1237
1238     int sx = 0, sy = 0;
1239     GetVirtualSize(& sx, & sy);
1240     int sxUnits = 0;
1241     int syUnits = 0;
1242     if (ppuY != 0)
1243         syUnits = sy/ppuY;
1244
1245     wxRect rect = line->GetRect();
1246
1247     bool scrolled = false;
1248
1249     wxSize clientSize = GetClientSize();
1250     clientSize.y -= GetBuffer().GetBottomMargin();
1251
1252     if (GetWindowStyle() & wxRE_CENTRE_CARET)
1253     {
1254         int y = rect.y - GetClientSize().y/2;
1255         int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1256         if (y >= 0 && (y + clientSize.y) < GetBuffer().GetCachedSize().y)
1257         {
1258             if (startYUnits != yUnits)
1259             {
1260                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1261                 scrolled = true;
1262             }
1263 #if !wxRICHTEXT_USE_OWN_CARET
1264             if (scrolled)
1265 #endif
1266                 PositionCaret();
1267
1268             return scrolled;
1269         }
1270     }
1271
1272     // Going down
1273     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1274         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1275         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1276         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1277     {
1278         if ((rect.y + rect.height) > (clientSize.y + startY))
1279         {
1280             // Make it scroll so this item is at the bottom
1281             // of the window
1282             int y = rect.y - (clientSize.y - rect.height);
1283             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1284
1285             // If we're still off the screen, scroll another line down
1286             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1287                 yUnits ++;
1288
1289             if (startYUnits != yUnits)
1290             {
1291                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1292                 scrolled = true;
1293             }
1294         }
1295         else if (rect.y < (startY + GetBuffer().GetTopMargin()))
1296         {
1297             // Make it scroll so this item is at the top
1298             // of the window
1299             int y = rect.y - GetBuffer().GetTopMargin();
1300             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1301
1302             if (startYUnits != yUnits)
1303             {
1304                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1305                 scrolled = true;
1306             }
1307         }
1308     }
1309     // Going up
1310     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1311              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1312              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1313              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1314     {
1315         if (rect.y < (startY + GetBuffer().GetBottomMargin()))
1316         {
1317             // Make it scroll so this item is at the top
1318             // of the window
1319             int y = rect.y - GetBuffer().GetTopMargin();
1320             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1321
1322             if (startYUnits != yUnits)
1323             {
1324                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1325                 scrolled = true;
1326             }
1327         }
1328         else if ((rect.y + rect.height) > (clientSize.y + startY))
1329         {
1330             // Make it scroll so this item is at the bottom
1331             // of the window
1332             int y = rect.y - (clientSize.y - rect.height);
1333             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1334
1335             // If we're still off the screen, scroll another line down
1336             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1337                 yUnits ++;
1338
1339             if (startYUnits != yUnits)
1340             {
1341                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1342                 scrolled = true;
1343             }
1344         }
1345     }
1346
1347 #if !wxRICHTEXT_USE_OWN_CARET
1348     if (scrolled)
1349 #endif
1350         PositionCaret();
1351
1352     return scrolled;
1353 }
1354
1355 /// Is the given position visible on the screen?
1356 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1357 {
1358     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1359
1360     if (!line)
1361         return false;
1362
1363     int ppuX, ppuY;
1364     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1365
1366     int startX, startY;
1367     GetViewStart(& startX, & startY);
1368     startX = 0;
1369     startY = startY * ppuY;
1370
1371     wxRect rect = line->GetRect();
1372     wxSize clientSize = GetClientSize();
1373     clientSize.y -= GetBuffer().GetBottomMargin();
1374
1375     return (rect.GetBottom() > (startY + GetBuffer().GetTopMargin())) && (rect.GetTop() < (startY + clientSize.y));
1376 }
1377
1378 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1379 {
1380     m_caretPosition = position;
1381     m_caretAtLineStart = showAtLineStart;
1382 }
1383
1384 /// Move caret one visual step forward: this may mean setting a flag
1385 /// and keeping the same position if we're going from the end of one line
1386 /// to the start of the next, which may be the exact same caret position.
1387 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1388 {
1389     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1390
1391     // Only do the check if we're not at the end of the paragraph (where things work OK
1392     // anyway)
1393     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1394     {
1395         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1396
1397         if (line)
1398         {
1399             wxRichTextRange lineRange = line->GetAbsoluteRange();
1400
1401             // We're at the end of a line. See whether we need to
1402             // stay at the same actual caret position but change visual
1403             // position, or not.
1404             if (oldPosition == lineRange.GetEnd())
1405             {
1406                 if (m_caretAtLineStart)
1407                 {
1408                     // We're already at the start of the line, so actually move on now.
1409                     m_caretPosition = oldPosition + 1;
1410                     m_caretAtLineStart = false;
1411                 }
1412                 else
1413                 {
1414                     // We're showing at the end of the line, so keep to
1415                     // the same position but indicate that we're to show
1416                     // at the start of the next line.
1417                     m_caretPosition = oldPosition;
1418                     m_caretAtLineStart = true;
1419                 }
1420                 SetDefaultStyleToCursorStyle();
1421                 return;
1422             }
1423         }
1424     }
1425     m_caretPosition ++;
1426     SetDefaultStyleToCursorStyle();
1427 }
1428
1429 /// Move caret one visual step backward: this may mean setting a flag
1430 /// and keeping the same position if we're going from the end of one line
1431 /// to the start of the next, which may be the exact same caret position.
1432 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1433 {
1434     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1435
1436     // Only do the check if we're not at the start of the paragraph (where things work OK
1437     // anyway)
1438     if (para && (oldPosition != para->GetRange().GetStart()))
1439     {
1440         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1441
1442         if (line)
1443         {
1444             wxRichTextRange lineRange = line->GetAbsoluteRange();
1445
1446             // We're at the start of a line. See whether we need to
1447             // stay at the same actual caret position but change visual
1448             // position, or not.
1449             if (oldPosition == lineRange.GetStart())
1450             {
1451                 m_caretPosition = oldPosition-1;
1452                 m_caretAtLineStart = true;
1453                 return;
1454             }
1455             else if (oldPosition == lineRange.GetEnd())
1456             {
1457                 if (m_caretAtLineStart)
1458                 {
1459                     // We're at the start of the line, so keep the same caret position
1460                     // but clear the start-of-line flag.
1461                     m_caretPosition = oldPosition;
1462                     m_caretAtLineStart = false;
1463                 }
1464                 else
1465                 {
1466                     // We're showing at the end of the line, so go back
1467                     // to the previous character position.
1468                     m_caretPosition = oldPosition - 1;
1469                 }
1470                 SetDefaultStyleToCursorStyle();
1471                 return;
1472             }
1473         }
1474     }
1475     m_caretPosition --;
1476     SetDefaultStyleToCursorStyle();
1477 }
1478
1479 /// Move right
1480 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1481 {
1482     long endPos = GetBuffer().GetRange().GetEnd();
1483
1484     if (m_caretPosition + noPositions < endPos)
1485     {
1486         long oldPos = m_caretPosition;
1487         long newPos = m_caretPosition + noPositions;
1488
1489         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1490         if (!extendSel)
1491             SelectNone();
1492
1493         // Determine by looking at oldPos and m_caretPosition whether
1494         // we moved from the end of a line to the start of the next line, in which case
1495         // we want to adjust the caret position such that it is positioned at the
1496         // start of the next line, rather than jumping past the first character of the
1497         // line.
1498         if (noPositions == 1 && !extendSel)
1499             MoveCaretForward(oldPos);
1500         else
1501             SetCaretPosition(newPos);
1502
1503         PositionCaret();
1504         SetDefaultStyleToCursorStyle();
1505
1506         return true;
1507     }
1508     else
1509         return false;
1510 }
1511
1512 /// Move left
1513 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1514 {
1515     long startPos = -1;
1516
1517     if (m_caretPosition > startPos - noPositions + 1)
1518     {
1519         long oldPos = m_caretPosition;
1520         long newPos = m_caretPosition - noPositions;
1521         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1522         if (!extendSel)
1523             SelectNone();
1524
1525         if (noPositions == 1 && !extendSel)
1526             MoveCaretBack(oldPos);
1527         else
1528             SetCaretPosition(newPos);
1529
1530         PositionCaret();
1531         SetDefaultStyleToCursorStyle();
1532
1533         return true;
1534     }
1535     else
1536         return false;
1537 }
1538
1539 /// Move up
1540 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1541 {
1542     return MoveDown(- noLines, flags);
1543 }
1544
1545 /// Move up
1546 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1547 {
1548     if (!GetCaret())
1549         return false;
1550
1551     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1552     wxPoint pt = GetCaret()->GetPosition();
1553     long newLine = lineNumber + noLines;
1554
1555     if (lineNumber != -1)
1556     {
1557         if (noLines > 0)
1558         {
1559             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1560
1561             if (newLine > lastLine)
1562                 return false;
1563         }
1564         else
1565         {
1566             if (newLine < 0)
1567                 return false;
1568         }
1569     }
1570
1571     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1572     if (lineObj)
1573     {
1574         pt.y = lineObj->GetAbsolutePosition().y + 2;
1575     }
1576     else
1577         return false;
1578
1579     long newPos = 0;
1580     wxClientDC dc(this);
1581     PrepareDC(dc);
1582     dc.SetFont(GetFont());
1583
1584     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1585
1586     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1587     {
1588         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1589         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1590         // so we view the caret at the start of the line.
1591         bool caretLineStart = false;
1592         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1593         {
1594             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1595             wxRichTextRange lineRange;
1596             if (thisLine)
1597                 lineRange = thisLine->GetAbsoluteRange();
1598
1599             if (thisLine && (newPos-1) == lineRange.GetEnd())
1600             {
1601                 newPos --;
1602                 caretLineStart = true;
1603             }
1604             else
1605             {
1606                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1607                 if (para && para->GetRange().GetStart() == newPos)
1608                     newPos --;
1609             }
1610         }
1611
1612         long newSelEnd = newPos;
1613
1614         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1615         if (!extendSel)
1616             SelectNone();
1617
1618         SetCaretPosition(newPos, caretLineStart);
1619         PositionCaret();
1620         SetDefaultStyleToCursorStyle();
1621
1622         return true;
1623     }
1624
1625     return false;
1626 }
1627
1628 /// Move to the end of the paragraph
1629 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1630 {
1631     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1632     if (para)
1633     {
1634         long newPos = para->GetRange().GetEnd() - 1;
1635         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1636         if (!extendSel)
1637             SelectNone();
1638
1639         SetCaretPosition(newPos);
1640         PositionCaret();
1641         SetDefaultStyleToCursorStyle();
1642
1643         return true;
1644     }
1645
1646     return false;
1647 }
1648
1649 /// Move to the start of the paragraph
1650 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1651 {
1652     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1653     if (para)
1654     {
1655         long newPos = para->GetRange().GetStart() - 1;
1656         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1657         if (!extendSel)
1658             SelectNone();
1659
1660         SetCaretPosition(newPos);
1661         PositionCaret();
1662         SetDefaultStyleToCursorStyle();
1663
1664         return true;
1665     }
1666
1667     return false;
1668 }
1669
1670 /// Move to the end of the line
1671 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1672 {
1673     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1674
1675     if (line)
1676     {
1677         wxRichTextRange lineRange = line->GetAbsoluteRange();
1678         long newPos = lineRange.GetEnd();
1679         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1680         if (!extendSel)
1681             SelectNone();
1682
1683         SetCaretPosition(newPos);
1684         PositionCaret();
1685         SetDefaultStyleToCursorStyle();
1686
1687         return true;
1688     }
1689
1690     return false;
1691 }
1692
1693 /// Move to the start of the line
1694 bool wxRichTextCtrl::MoveToLineStart(int flags)
1695 {
1696     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1697     if (line)
1698     {
1699         wxRichTextRange lineRange = line->GetAbsoluteRange();
1700         long newPos = lineRange.GetStart()-1;
1701
1702         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1703         if (!extendSel)
1704             SelectNone();
1705
1706         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1707
1708         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1709         PositionCaret();
1710         SetDefaultStyleToCursorStyle();
1711
1712         return true;
1713     }
1714
1715     return false;
1716 }
1717
1718 /// Move to the start of the buffer
1719 bool wxRichTextCtrl::MoveHome(int flags)
1720 {
1721     if (m_caretPosition != -1)
1722     {
1723         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1724         if (!extendSel)
1725             SelectNone();
1726
1727         SetCaretPosition(-1);
1728         PositionCaret();
1729         SetDefaultStyleToCursorStyle();
1730
1731         return true;
1732     }
1733     else
1734         return false;
1735 }
1736
1737 /// Move to the end of the buffer
1738 bool wxRichTextCtrl::MoveEnd(int flags)
1739 {
1740     long endPos = GetBuffer().GetRange().GetEnd()-1;
1741
1742     if (m_caretPosition != endPos)
1743     {
1744         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1745         if (!extendSel)
1746             SelectNone();
1747
1748         SetCaretPosition(endPos);
1749         PositionCaret();
1750         SetDefaultStyleToCursorStyle();
1751
1752         return true;
1753     }
1754     else
1755         return false;
1756 }
1757
1758 /// Move noPages pages up
1759 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1760 {
1761     return PageDown(- noPages, flags);
1762 }
1763
1764 /// Move noPages pages down
1765 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1766 {
1767     // Calculate which line occurs noPages * screen height further down.
1768     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1769     if (line)
1770     {
1771         wxSize clientSize = GetClientSize();
1772         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1773
1774         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1775         if (newLine)
1776         {
1777             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1778             long pos = lineRange.GetStart()-1;
1779             if (pos != m_caretPosition)
1780             {
1781                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1782
1783                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1784                 if (!extendSel)
1785                     SelectNone();
1786
1787                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1788                 PositionCaret();
1789                 SetDefaultStyleToCursorStyle();
1790
1791                 return true;
1792             }
1793         }
1794     }
1795
1796     return false;
1797 }
1798
1799 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1800 {
1801     return str == wxT(" ") || str == wxT("\t");
1802 }
1803
1804 // Finds the caret position for the next word
1805 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1806 {
1807     long endPos = GetBuffer().GetRange().GetEnd();
1808
1809     if (direction > 0)
1810     {
1811         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1812
1813         // First skip current text to space
1814         while (i < endPos && i > -1)
1815         {
1816             // i is in character, not caret positions
1817             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1818             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1819             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1820             {
1821                 break;
1822             }
1823             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1824                 i += direction;
1825             else
1826             {
1827                 break;
1828             }
1829         }
1830         while (i < endPos && i > -1)
1831         {
1832             // i is in character, not caret positions
1833             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1834             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1835             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1836                 return wxMax(-1, i);
1837
1838             if (text.empty()) // End of paragraph, or maybe an image
1839                 return wxMax(-1, i - 1);
1840             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1841                 i += direction;
1842             else
1843             {
1844                 // Convert to caret position
1845                 return wxMax(-1, i - 1);
1846             }
1847         }
1848         if (i >= endPos)
1849             return endPos-1;
1850         return i-1;
1851     }
1852     else
1853     {
1854         long i = m_caretPosition;
1855
1856         // First skip white space
1857         while (i < endPos && i > -1)
1858         {
1859             // i is in character, not caret positions
1860             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1861             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1862
1863             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1864                 break;
1865             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1866                 i += direction;
1867             else
1868                 break;
1869         }
1870         // Next skip current text to space
1871         while (i < endPos && i > -1)
1872         {
1873             // i is in character, not caret positions
1874             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1875             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1876             if (line && line->GetAbsoluteRange().GetStart() == i)
1877                 return i-1;
1878
1879             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1880                 i += direction;
1881             else
1882             {
1883                 return i;
1884             }
1885         }
1886         if (i < -1)
1887             return -1;
1888         return i;
1889     }
1890 }
1891
1892 /// Move n words left
1893 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1894 {
1895     long pos = FindNextWordPosition(-1);
1896     if (pos != m_caretPosition)
1897     {
1898         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1899
1900         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1901         if (!extendSel)
1902             SelectNone();
1903
1904         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1905         PositionCaret();
1906         SetDefaultStyleToCursorStyle();
1907
1908         return true;
1909     }
1910
1911     return false;
1912 }
1913
1914 /// Move n words right
1915 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1916 {
1917     long pos = FindNextWordPosition(1);
1918     if (pos != m_caretPosition)
1919     {
1920         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1921
1922         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1923         if (!extendSel)
1924             SelectNone();
1925
1926         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1927         PositionCaret();
1928         SetDefaultStyleToCursorStyle();
1929
1930         return true;
1931     }
1932
1933     return false;
1934 }
1935
1936 /// Sizing
1937 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1938 {
1939     // Only do sizing optimization for large buffers
1940     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1941     {
1942         m_fullLayoutRequired = true;
1943         m_fullLayoutTime = wxGetLocalTimeMillis();
1944         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1945         LayoutContent(true /* onlyVisibleRect */);
1946     }
1947     else
1948         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1949
1950 #if wxRICHTEXT_BUFFERED_PAINTING
1951     RecreateBuffer();
1952 #endif
1953
1954     event.Skip();
1955 }
1956
1957
1958 /// Idle-time processing
1959 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1960 {
1961 #if wxRICHTEXT_USE_OWN_CARET
1962     if (((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
1963     {
1964         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate(false);
1965         PositionCaret();
1966         GetCaret()->Show();
1967     }
1968 #endif
1969
1970     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1971
1972     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1973     {
1974         m_fullLayoutRequired = false;
1975         m_fullLayoutTime = 0;
1976         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1977         ShowPosition(m_fullLayoutSavedPosition);
1978         Refresh(false);
1979     }
1980
1981     if (m_caretPositionForDefaultStyle != -2)
1982     {
1983         // If the caret position has changed, no longer reflect the default style
1984         // in the UI.
1985         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1986             m_caretPositionForDefaultStyle = -2;
1987     }
1988
1989     event.Skip();
1990 }
1991
1992 /// Scrolling
1993 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1994 {
1995 #if wxRICHTEXT_USE_OWN_CARET
1996     if (!((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
1997     {
1998         GetCaret()->Hide();
1999         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate();
2000     }
2001 #endif
2002
2003     event.Skip();
2004 }
2005
2006 /// Set up scrollbars, e.g. after a resize
2007 void wxRichTextCtrl::SetupScrollbars(bool atTop)
2008 {
2009     if (IsFrozen())
2010         return;
2011
2012     if (GetBuffer().IsEmpty())
2013     {
2014         SetScrollbars(0, 0, 0, 0, 0, 0);
2015         return;
2016     }
2017
2018     // TODO: reimplement scrolling so we scroll by line, not by fixed number
2019     // of pixels. See e.g. wxVScrolledWindow for ideas.
2020     int pixelsPerUnit = 5;
2021     wxSize clientSize = GetClientSize();
2022
2023     int maxHeight = GetBuffer().GetCachedSize().y + GetBuffer().GetTopMargin();
2024
2025     // Round up so we have at least maxHeight pixels
2026     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
2027
2028     int startX = 0, startY = 0;
2029     if (!atTop)
2030         GetViewStart(& startX, & startY);
2031
2032     int maxPositionX = 0;
2033     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
2034
2035     int newStartX = wxMin(maxPositionX, startX);
2036     int newStartY = wxMin(maxPositionY, startY);
2037
2038     int oldPPUX, oldPPUY;
2039     int oldStartX, oldStartY;
2040     int oldVirtualSizeX = 0, oldVirtualSizeY = 0;
2041     GetScrollPixelsPerUnit(& oldPPUX, & oldPPUY);
2042     GetViewStart(& oldStartX, & oldStartY);
2043     GetVirtualSize(& oldVirtualSizeX, & oldVirtualSizeY);
2044     if (oldPPUY > 0)
2045         oldVirtualSizeY /= oldPPUY;
2046
2047     if (oldPPUX == 0 && oldPPUY == pixelsPerUnit && oldVirtualSizeY == unitsY && oldStartX == newStartX && oldStartY == newStartY)
2048         return;
2049
2050     // Don't set scrollbars if there were none before, and there will be none now.
2051     if (oldPPUY != 0 && (oldVirtualSizeY < clientSize.y) && (unitsY*pixelsPerUnit < clientSize.y))
2052         return;
2053
2054     // Move to previous scroll position if
2055     // possible
2056     SetScrollbars(0, pixelsPerUnit, 0, unitsY, newStartX, newStartY);
2057 }
2058
2059 /// Paint the background
2060 void wxRichTextCtrl::PaintBackground(wxDC& dc)
2061 {
2062     wxColour backgroundColour = GetBackgroundColour();
2063     if (!backgroundColour.Ok())
2064         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
2065
2066     // Clear the background
2067     dc.SetBrush(wxBrush(backgroundColour));
2068     dc.SetPen(*wxTRANSPARENT_PEN);
2069     wxRect windowRect(GetClientSize());
2070     windowRect.x -= 2; windowRect.y -= 2;
2071     windowRect.width += 4; windowRect.height += 4;
2072
2073     // We need to shift the rectangle to take into account
2074     // scrolling. Converting device to logical coordinates.
2075     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
2076     dc.DrawRectangle(windowRect);
2077 }
2078
2079 #if wxRICHTEXT_BUFFERED_PAINTING
2080 /// Recreate buffer bitmap if necessary
2081 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
2082 {
2083     wxSize sz = size;
2084     if (sz == wxDefaultSize)
2085         sz = GetClientSize();
2086
2087     if (sz.x < 1 || sz.y < 1)
2088         return false;
2089
2090     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
2091         m_bufferBitmap = wxBitmap(sz.x, sz.y);
2092     return m_bufferBitmap.Ok();
2093 }
2094 #endif
2095
2096 // ----------------------------------------------------------------------------
2097 // file IO functions
2098 // ----------------------------------------------------------------------------
2099
2100 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
2101 {
2102     bool success = GetBuffer().LoadFile(filename, (wxRichTextFileType)fileType);
2103     if (success)
2104         m_filename = filename;
2105
2106     DiscardEdits();
2107     SetInsertionPoint(0);
2108     LayoutContent();
2109     PositionCaret();
2110     SetupScrollbars(true);
2111     Refresh(false);
2112     wxTextCtrl::SendTextUpdatedEvent(this);
2113
2114     if (success)
2115         return true;
2116     else
2117     {
2118         wxLogError(_("File couldn't be loaded."));
2119
2120         return false;
2121     }
2122 }
2123
2124 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
2125 {
2126     if (GetBuffer().SaveFile(filename, (wxRichTextFileType)fileType))
2127     {
2128         m_filename = filename;
2129
2130         DiscardEdits();
2131
2132         return true;
2133     }
2134
2135     wxLogError(_("The text couldn't be saved."));
2136
2137     return false;
2138 }
2139
2140 // ----------------------------------------------------------------------------
2141 // wxRichTextCtrl specific functionality
2142 // ----------------------------------------------------------------------------
2143
2144 /// Add a new paragraph of text to the end of the buffer
2145 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
2146 {
2147     wxRichTextRange range = GetBuffer().AddParagraph(text);
2148     LayoutContent();
2149     return range;
2150 }
2151
2152 /// Add an image
2153 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
2154 {
2155     wxRichTextRange range = GetBuffer().AddImage(image);
2156     LayoutContent();
2157     return range;
2158 }
2159
2160 // ----------------------------------------------------------------------------
2161 // selection and ranges
2162 // ----------------------------------------------------------------------------
2163
2164 void wxRichTextCtrl::SelectAll()
2165 {
2166     SetSelection(0, GetLastPosition()+1);
2167     m_selectionAnchor = -1;
2168 }
2169
2170 /// Select none
2171 void wxRichTextCtrl::SelectNone()
2172 {
2173     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
2174     {
2175         wxRichTextRange oldSelection = m_selectionRange;
2176
2177         m_selectionRange = wxRichTextRange(-2, -2);
2178
2179         RefreshForSelectionChange(oldSelection, m_selectionRange);
2180     }
2181     m_selectionAnchor = -2;
2182 }
2183
2184 static bool wxIsWordDelimiter(const wxString& text)
2185 {
2186     return !text.IsEmpty() && !wxIsalnum(text[0]);
2187 }
2188
2189 /// Select the word at the given character position
2190 bool wxRichTextCtrl::SelectWord(long position)
2191 {
2192     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
2193         return false;
2194
2195     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
2196     if (!para)
2197         return false;
2198
2199     if (position == para->GetRange().GetEnd())
2200         position --;
2201
2202     long positionStart = position;
2203     long positionEnd = position;
2204
2205     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
2206     {
2207         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
2208         if (wxIsWordDelimiter(text))
2209         {
2210             positionStart ++;
2211             break;
2212         }
2213     }
2214     if (positionStart < para->GetRange().GetStart())
2215         positionStart = para->GetRange().GetStart();
2216
2217     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
2218     {
2219         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
2220         if (wxIsWordDelimiter(text))
2221         {
2222             positionEnd --;
2223             break;
2224         }
2225     }
2226     if (positionEnd >= para->GetRange().GetEnd())
2227         positionEnd = para->GetRange().GetEnd();
2228
2229     if (positionEnd < positionStart)
2230         return false;
2231
2232     SetSelection(positionStart, positionEnd+1);
2233
2234     if (positionStart >= 0)
2235     {
2236         MoveCaret(positionStart-1, true);
2237         SetDefaultStyleToCursorStyle();
2238     }
2239
2240     return true;
2241 }
2242
2243 wxString wxRichTextCtrl::GetStringSelection() const
2244 {
2245     long from, to;
2246     GetSelection(&from, &to);
2247
2248     return GetRange(from, to);
2249 }
2250
2251 // ----------------------------------------------------------------------------
2252 // hit testing
2253 // ----------------------------------------------------------------------------
2254
2255 wxTextCtrlHitTestResult
2256 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2257 {
2258     // implement in terms of the other overload as the native ports typically
2259     // can get the position and not (x, y) pair directly (although wxUniv
2260     // directly gets x and y -- and so overrides this method as well)
2261     long pos;
2262     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2263
2264     if ( rc != wxTE_HT_UNKNOWN )
2265     {
2266         PositionToXY(pos, x, y);
2267     }
2268
2269     return rc;
2270 }
2271
2272 wxTextCtrlHitTestResult
2273 wxRichTextCtrl::HitTest(const wxPoint& pt,
2274                         long * pos) const
2275 {
2276     wxClientDC dc((wxRichTextCtrl*) this);
2277     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2278
2279     // Buffer uses logical position (relative to start of buffer)
2280     // so convert
2281     wxPoint pt2 = GetLogicalPoint(pt);
2282
2283     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
2284
2285     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2286         return wxTE_HT_BEFORE;
2287     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2288         return wxTE_HT_BEYOND;
2289     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2290         return wxTE_HT_ON_TEXT;
2291
2292     return wxTE_HT_UNKNOWN;
2293 }
2294
2295 // ----------------------------------------------------------------------------
2296 // set/get the controls text
2297 // ----------------------------------------------------------------------------
2298
2299 wxString wxRichTextCtrl::DoGetValue() const
2300 {
2301     return GetBuffer().GetText();
2302 }
2303
2304 wxString wxRichTextCtrl::GetRange(long from, long to) const
2305 {
2306     // Public API for range is different from internals
2307     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2308 }
2309
2310 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2311 {
2312     // Don't call Clear here, since it always sends a text updated event
2313     m_buffer.ResetAndClearCommands();
2314     m_buffer.SetDirty(true);
2315     m_caretPosition = -1;
2316     m_caretPositionForDefaultStyle = -2;
2317     m_caretAtLineStart = false;
2318     m_selectionRange.SetRange(-2, -2);
2319
2320     Scroll(0,0);
2321
2322     if (!IsFrozen())
2323     {
2324         LayoutContent();
2325         Refresh(false);
2326     }
2327
2328     if (!value.IsEmpty())
2329     {
2330         // Remove empty paragraph
2331         GetBuffer().Clear();
2332         DoWriteText(value, flags);
2333
2334         // for compatibility, don't move the cursor when doing SetValue()
2335         SetInsertionPoint(0);
2336     }
2337     else
2338     {
2339         // still send an event for consistency
2340         if (flags & SetValue_SendEvent)
2341             wxTextCtrl::SendTextUpdatedEvent(this);
2342     }
2343     DiscardEdits();
2344 }
2345
2346 void wxRichTextCtrl::WriteText(const wxString& value)
2347 {
2348     DoWriteText(value);
2349 }
2350
2351 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2352 {
2353     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2354
2355     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2356
2357     if ( flags & SetValue_SendEvent )
2358         wxTextCtrl::SendTextUpdatedEvent(this);
2359 }
2360
2361 void wxRichTextCtrl::AppendText(const wxString& text)
2362 {
2363     SetInsertionPointEnd();
2364
2365     WriteText(text);
2366 }
2367
2368 /// Write an image at the current insertion point
2369 bool wxRichTextCtrl::WriteImage(const wxImage& image, wxBitmapType bitmapType)
2370 {
2371     wxRichTextImageBlock imageBlock;
2372
2373     wxImage image2 = image;
2374     if (imageBlock.MakeImageBlock(image2, bitmapType))
2375         return WriteImage(imageBlock);
2376
2377     return false;
2378 }
2379
2380 bool wxRichTextCtrl::WriteImage(const wxString& filename, wxBitmapType bitmapType)
2381 {
2382     wxRichTextImageBlock imageBlock;
2383
2384     wxImage image;
2385     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2386         return WriteImage(imageBlock);
2387
2388     return false;
2389 }
2390
2391 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2392 {
2393     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2394 }
2395
2396 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, wxBitmapType bitmapType)
2397 {
2398     if (bitmap.Ok())
2399     {
2400         wxRichTextImageBlock imageBlock;
2401
2402         wxImage image = bitmap.ConvertToImage();
2403         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2404             return WriteImage(imageBlock);
2405     }
2406
2407     return false;
2408 }
2409
2410 /// Insert a newline (actually paragraph) at the current insertion point.
2411 bool wxRichTextCtrl::Newline()
2412 {
2413     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2414 }
2415
2416 /// Insert a line break at the current insertion point.
2417 bool wxRichTextCtrl::LineBreak()
2418 {
2419     wxString text;
2420     text = wxRichTextLineBreakChar;
2421     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2422 }
2423
2424 // ----------------------------------------------------------------------------
2425 // Clipboard operations
2426 // ----------------------------------------------------------------------------
2427
2428 void wxRichTextCtrl::Copy()
2429 {
2430     if (CanCopy())
2431     {
2432         wxRichTextRange range = GetInternalSelectionRange();
2433         GetBuffer().CopyToClipboard(range);
2434     }
2435 }
2436
2437 void wxRichTextCtrl::Cut()
2438 {
2439     if (CanCut())
2440     {
2441         wxRichTextRange range = GetInternalSelectionRange();
2442         GetBuffer().CopyToClipboard(range);
2443
2444         DeleteSelectedContent();
2445         LayoutContent();
2446         Refresh(false);
2447     }
2448 }
2449
2450 void wxRichTextCtrl::Paste()
2451 {
2452     if (CanPaste())
2453     {
2454         BeginBatchUndo(_("Paste"));
2455
2456         long newPos = m_caretPosition;
2457         DeleteSelectedContent(& newPos);
2458
2459         GetBuffer().PasteFromClipboard(newPos);
2460
2461         EndBatchUndo();
2462     }
2463 }
2464
2465 void wxRichTextCtrl::DeleteSelection()
2466 {
2467     if (CanDeleteSelection())
2468     {
2469         DeleteSelectedContent();
2470     }
2471 }
2472
2473 bool wxRichTextCtrl::HasSelection() const
2474 {
2475     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2476 }
2477
2478 bool wxRichTextCtrl::CanCopy() const
2479 {
2480     // Can copy if there's a selection
2481     return HasSelection();
2482 }
2483
2484 bool wxRichTextCtrl::CanCut() const
2485 {
2486     return HasSelection() && IsEditable();
2487 }
2488
2489 bool wxRichTextCtrl::CanPaste() const
2490 {
2491     if ( !IsEditable() )
2492         return false;
2493
2494     return GetBuffer().CanPasteFromClipboard();
2495 }
2496
2497 bool wxRichTextCtrl::CanDeleteSelection() const
2498 {
2499     return HasSelection() && IsEditable();
2500 }
2501
2502
2503 // ----------------------------------------------------------------------------
2504 // Accessors
2505 // ----------------------------------------------------------------------------
2506
2507 void wxRichTextCtrl::SetEditable(bool editable)
2508 {
2509     m_editable = editable;
2510 }
2511
2512 void wxRichTextCtrl::SetInsertionPoint(long pos)
2513 {
2514     SelectNone();
2515
2516     m_caretPosition = pos - 1;
2517
2518     PositionCaret();
2519 }
2520
2521 void wxRichTextCtrl::SetInsertionPointEnd()
2522 {
2523     long pos = GetLastPosition();
2524     SetInsertionPoint(pos);
2525 }
2526
2527 long wxRichTextCtrl::GetInsertionPoint() const
2528 {
2529     return m_caretPosition+1;
2530 }
2531
2532 wxTextPos wxRichTextCtrl::GetLastPosition() const
2533 {
2534     return GetBuffer().GetRange().GetEnd();
2535 }
2536
2537 // If the return values from and to are the same, there is no
2538 // selection.
2539 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2540 {
2541     *from = m_selectionRange.GetStart();
2542     *to = m_selectionRange.GetEnd();
2543     if ((*to) != -1 && (*to) != -2)
2544         (*to) ++;
2545 }
2546
2547 bool wxRichTextCtrl::IsEditable() const
2548 {
2549     return m_editable;
2550 }
2551
2552 // ----------------------------------------------------------------------------
2553 // selection
2554 // ----------------------------------------------------------------------------
2555
2556 void wxRichTextCtrl::SetSelection(long from, long to)
2557 {
2558     // if from and to are both -1, it means (in wxWidgets) that all text should
2559     // be selected.
2560     if ( (from == -1) && (to == -1) )
2561     {
2562         from = 0;
2563         to = GetLastPosition()+1;
2564     }
2565
2566     if (from == to)
2567     {
2568         SelectNone();
2569     }
2570     else
2571     {
2572         wxRichTextRange oldSelection = m_selectionRange;
2573         m_selectionAnchor = from;
2574         m_selectionRange.SetRange(from, to-1);
2575         if (from > -2)
2576             m_caretPosition = from-1;
2577
2578         RefreshForSelectionChange(oldSelection, m_selectionRange);
2579         PositionCaret();
2580     }
2581 }
2582
2583 // ----------------------------------------------------------------------------
2584 // Editing
2585 // ----------------------------------------------------------------------------
2586
2587 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2588                              const wxString& value)
2589 {
2590     BeginBatchUndo(_("Replace"));
2591
2592     DeleteSelectedContent();
2593
2594     DoWriteText(value, SetValue_SelectionOnly);
2595
2596     EndBatchUndo();
2597 }
2598
2599 void wxRichTextCtrl::Remove(long from, long to)
2600 {
2601     SelectNone();
2602
2603     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to-1), this);
2604
2605     LayoutContent();
2606     if (!IsFrozen())
2607         Refresh(false);
2608 }
2609
2610 bool wxRichTextCtrl::IsModified() const
2611 {
2612     return m_buffer.IsModified();
2613 }
2614
2615 void wxRichTextCtrl::MarkDirty()
2616 {
2617     m_buffer.Modify(true);
2618 }
2619
2620 void wxRichTextCtrl::DiscardEdits()
2621 {
2622     m_caretPositionForDefaultStyle = -2;
2623     m_buffer.Modify(false);
2624     m_buffer.GetCommandProcessor()->ClearCommands();
2625 }
2626
2627 int wxRichTextCtrl::GetNumberOfLines() const
2628 {
2629     return GetBuffer().GetParagraphCount();
2630 }
2631
2632 // ----------------------------------------------------------------------------
2633 // Positions <-> coords
2634 // ----------------------------------------------------------------------------
2635
2636 long wxRichTextCtrl::XYToPosition(long x, long y) const
2637 {
2638     return GetBuffer().XYToPosition(x, y);
2639 }
2640
2641 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2642 {
2643     return GetBuffer().PositionToXY(pos, x, y);
2644 }
2645
2646 // ----------------------------------------------------------------------------
2647 //
2648 // ----------------------------------------------------------------------------
2649
2650 void wxRichTextCtrl::ShowPosition(long pos)
2651 {
2652     if (!IsPositionVisible(pos))
2653         ScrollIntoView(pos-1, WXK_DOWN);
2654 }
2655
2656 int wxRichTextCtrl::GetLineLength(long lineNo) const
2657 {
2658     return GetBuffer().GetParagraphLength(lineNo);
2659 }
2660
2661 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2662 {
2663     return GetBuffer().GetParagraphText(lineNo);
2664 }
2665
2666 // ----------------------------------------------------------------------------
2667 // Undo/redo
2668 // ----------------------------------------------------------------------------
2669
2670 void wxRichTextCtrl::Undo()
2671 {
2672     if (CanUndo())
2673     {
2674         GetCommandProcessor()->Undo();
2675     }
2676 }
2677
2678 void wxRichTextCtrl::Redo()
2679 {
2680     if (CanRedo())
2681     {
2682         GetCommandProcessor()->Redo();
2683     }
2684 }
2685
2686 bool wxRichTextCtrl::CanUndo() const
2687 {
2688     return GetCommandProcessor()->CanUndo();
2689 }
2690
2691 bool wxRichTextCtrl::CanRedo() const
2692 {
2693     return GetCommandProcessor()->CanRedo();
2694 }
2695
2696 // ----------------------------------------------------------------------------
2697 // implementation details
2698 // ----------------------------------------------------------------------------
2699
2700 void wxRichTextCtrl::Command(wxCommandEvent& event)
2701 {
2702     SetValue(event.GetString());
2703     GetEventHandler()->ProcessEvent(event);
2704 }
2705
2706 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2707 {
2708     // By default, load the first file into the text window.
2709     if (event.GetNumberOfFiles() > 0)
2710     {
2711         LoadFile(event.GetFiles()[0]);
2712     }
2713 }
2714
2715 wxSize wxRichTextCtrl::DoGetBestSize() const
2716 {
2717     return wxSize(10, 10);
2718 }
2719
2720 // ----------------------------------------------------------------------------
2721 // standard handlers for standard edit menu events
2722 // ----------------------------------------------------------------------------
2723
2724 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2725 {
2726     Cut();
2727 }
2728
2729 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2730 {
2731     DeleteSelection();
2732 }
2733
2734 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2735 {
2736     Copy();
2737 }
2738
2739 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2740 {
2741     Paste();
2742 }
2743
2744 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2745 {
2746     Undo();
2747 }
2748
2749 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2750 {
2751     Redo();
2752 }
2753
2754 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2755 {
2756     event.Enable( CanCut() );
2757 }
2758
2759 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2760 {
2761     event.Enable( CanCopy() );
2762 }
2763
2764 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2765 {
2766     event.Enable( CanDeleteSelection() );
2767 }
2768
2769 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2770 {
2771     event.Enable( CanPaste() );
2772 }
2773
2774 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2775 {
2776     event.Enable( CanUndo() );
2777     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2778 }
2779
2780 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2781 {
2782     event.Enable( CanRedo() );
2783     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2784 }
2785
2786 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2787 {
2788     SelectAll();
2789 }
2790
2791 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2792 {
2793     event.Enable(GetLastPosition() > 0);
2794 }
2795
2796 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2797 {
2798     if (event.GetEventObject() != this)
2799     {
2800         event.Skip();
2801         return;
2802     }
2803
2804     if (!m_contextMenu)
2805     {
2806         m_contextMenu = new wxMenu;
2807         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2808         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2809         m_contextMenu->AppendSeparator();
2810         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2811         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2812         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2813         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2814         m_contextMenu->AppendSeparator();
2815         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2816     }
2817     PopupMenu(m_contextMenu);
2818     return;
2819 }
2820
2821 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2822 {
2823     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttr(style));
2824 }
2825
2826 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxTextAttr& style)
2827 {
2828     return GetBuffer().SetStyle(range.ToInternal(), style);
2829 }
2830
2831 // extended style setting operation with flags including:
2832 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2833 // see richtextbuffer.h for more details.
2834
2835 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttr& style, int flags)
2836 {
2837     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2838 }
2839
2840 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2841 {
2842     return GetBuffer().SetDefaultStyle(wxTextAttr(style));
2843 }
2844
2845 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2846 {
2847     return GetBuffer().GetDefaultStyle();
2848 }
2849
2850 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2851 {
2852     return GetBuffer().GetStyle(position, style);
2853 }
2854
2855 // get the common set of styles for the range
2856 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttr& style)
2857 {
2858     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2859 }
2860
2861 /// Get the content (uncombined) attributes for this position.
2862 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2863 {
2864     return GetBuffer().GetUncombinedStyle(position, style);
2865 }
2866
2867 /// Set font, and also the buffer attributes
2868 bool wxRichTextCtrl::SetFont(const wxFont& font)
2869 {
2870     wxTextCtrlBase::SetFont(font);
2871
2872     wxTextAttr attr = GetBuffer().GetAttributes();
2873     attr.SetFont(font);
2874     GetBuffer().SetBasicStyle(attr);
2875
2876     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2877     Refresh(false);
2878
2879     return true;
2880 }
2881
2882 /// Transform logical to physical
2883 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2884 {
2885     wxPoint pt;
2886     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2887
2888     return pt;
2889 }
2890
2891 /// Transform physical to logical
2892 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2893 {
2894     wxPoint pt;
2895     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2896
2897     return pt;
2898 }
2899
2900 /// Position the caret
2901 void wxRichTextCtrl::PositionCaret()
2902 {
2903     if (!GetCaret())
2904         return;
2905
2906     //wxLogDebug(wxT("PositionCaret"));
2907
2908     wxRect caretRect;
2909     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2910     {
2911         wxPoint newPt = caretRect.GetPosition();
2912         wxSize newSz = caretRect.GetSize();
2913         wxPoint pt = GetPhysicalPoint(newPt);
2914         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
2915         {
2916             GetCaret()->Hide();
2917             if (GetCaret()->GetSize() != newSz)
2918                 GetCaret()->SetSize(newSz);
2919
2920             int halfSize = newSz.y/2;
2921             // If the caret is beyond the margin, hide it by moving it out of the way
2922             if (((pt.y + halfSize) < GetBuffer().GetTopMargin()) || ((pt.y + halfSize) > (GetClientSize().y - GetBuffer().GetBottomMargin())))
2923                 pt.y = -200;
2924
2925             GetCaret()->Move(pt);
2926             GetCaret()->Show();
2927         }
2928     }
2929 }
2930
2931 /// Get the caret height and position for the given character position
2932 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2933 {
2934     wxClientDC dc(this);
2935     dc.SetFont(GetFont());
2936
2937     PrepareDC(dc);
2938
2939     wxPoint pt;
2940     int height = 0;
2941
2942     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2943     {
2944         // Caret height can't be zero
2945         if (height == 0)
2946             height = dc.GetCharHeight();
2947
2948         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2949         return true;
2950     }
2951
2952     return false;
2953 }
2954
2955 /// Gets the line for the visible caret position. If the caret is
2956 /// shown at the very end of the line, it means the next character is actually
2957 /// on the following line. So let's get the line we're expecting to find
2958 /// if this is the case.
2959 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2960 {
2961     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2962     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2963     if (line)
2964     {
2965         wxRichTextRange lineRange = line->GetAbsoluteRange();
2966         if (caretPosition == lineRange.GetStart()-1 &&
2967             (para->GetRange().GetStart() != lineRange.GetStart()))
2968         {
2969             if (!m_caretAtLineStart)
2970                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2971         }
2972     }
2973     return line;
2974 }
2975
2976
2977 /// Move the caret to the given character position
2978 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2979 {
2980     if (GetBuffer().GetDirty())
2981         LayoutContent();
2982
2983     if (pos <= GetBuffer().GetRange().GetEnd())
2984     {
2985         SetCaretPosition(pos, showAtLineStart);
2986
2987         PositionCaret();
2988
2989         return true;
2990     }
2991     else
2992         return false;
2993 }
2994
2995 /// Layout the buffer: which we must do before certain operations, such as
2996 /// setting the caret position.
2997 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2998 {
2999     if (GetBuffer().GetDirty() || onlyVisibleRect)
3000     {
3001         wxRect availableSpace(GetClientSize());
3002         if (availableSpace.width == 0)
3003             availableSpace.width = 10;
3004         if (availableSpace.height == 0)
3005             availableSpace.height = 10;
3006
3007         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
3008         if (onlyVisibleRect)
3009         {
3010             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
3011             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
3012         }
3013
3014         wxClientDC dc(this);
3015         dc.SetFont(GetFont());
3016
3017         PrepareDC(dc);
3018
3019         GetBuffer().Defragment();
3020         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
3021         GetBuffer().Layout(dc, availableSpace, flags);
3022         GetBuffer().SetDirty(false);
3023
3024         if (!IsFrozen())
3025             SetupScrollbars();
3026     }
3027
3028     return true;
3029 }
3030
3031 /// Is all of the selection bold?
3032 bool wxRichTextCtrl::IsSelectionBold()
3033 {
3034     if (HasSelection())
3035     {
3036         wxTextAttr attr;
3037         wxRichTextRange range = GetSelectionRange();
3038         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3039         attr.SetFontWeight(wxFONTWEIGHT_BOLD);
3040
3041         return HasCharacterAttributes(range, attr);
3042     }
3043     else
3044     {
3045         // If no selection, then we need to combine current style with default style
3046         // to see what the effect would be if we started typing.
3047         wxTextAttr attr;
3048         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3049
3050         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3051         if (GetStyle(pos, attr))
3052         {
3053             if (IsDefaultStyleShowing())
3054                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3055             return attr.GetFontWeight() == wxFONTWEIGHT_BOLD;
3056         }
3057     }
3058     return false;
3059 }
3060
3061 /// Is all of the selection italics?
3062 bool wxRichTextCtrl::IsSelectionItalics()
3063 {
3064     if (HasSelection())
3065     {
3066         wxRichTextRange range = GetSelectionRange();
3067         wxTextAttr attr;
3068         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3069         attr.SetFontStyle(wxFONTSTYLE_ITALIC);
3070
3071         return HasCharacterAttributes(range, attr);
3072     }
3073     else
3074     {
3075         // If no selection, then we need to combine current style with default style
3076         // to see what the effect would be if we started typing.
3077         wxTextAttr attr;
3078         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3079
3080         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3081         if (GetStyle(pos, attr))
3082         {
3083             if (IsDefaultStyleShowing())
3084                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3085             return attr.GetFontStyle() == wxFONTSTYLE_ITALIC;
3086         }
3087     }
3088     return false;
3089 }
3090
3091 /// Is all of the selection underlined?
3092 bool wxRichTextCtrl::IsSelectionUnderlined()
3093 {
3094     if (HasSelection())
3095     {
3096         wxRichTextRange range = GetSelectionRange();
3097         wxTextAttr attr;
3098         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3099         attr.SetFontUnderlined(true);
3100
3101         return HasCharacterAttributes(range, attr);
3102     }
3103     else
3104     {
3105         // If no selection, then we need to combine current style with default style
3106         // to see what the effect would be if we started typing.
3107         wxTextAttr attr;
3108         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3109         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3110
3111         if (GetStyle(pos, attr))
3112         {
3113             if (IsDefaultStyleShowing())
3114                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3115             return attr.GetFontUnderlined();
3116         }
3117     }
3118     return false;
3119 }
3120
3121 /// Apply bold to the selection
3122 bool wxRichTextCtrl::ApplyBoldToSelection()
3123 {
3124     wxTextAttr attr;
3125     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3126     attr.SetFontWeight(IsSelectionBold() ? wxFONTWEIGHT_NORMAL : wxFONTWEIGHT_BOLD);
3127
3128     if (HasSelection())
3129         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3130     else
3131     {
3132         wxRichTextAttr current = GetDefaultStyleEx();
3133         current.Apply(attr);
3134         SetAndShowDefaultStyle(current);
3135     }
3136     return true;
3137 }
3138
3139 /// Apply italic to the selection
3140 bool wxRichTextCtrl::ApplyItalicToSelection()
3141 {
3142     wxTextAttr attr;
3143     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3144     attr.SetFontStyle(IsSelectionItalics() ? wxFONTSTYLE_NORMAL : wxFONTSTYLE_ITALIC);
3145
3146     if (HasSelection())
3147         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3148     else
3149     {
3150         wxRichTextAttr current = GetDefaultStyleEx();
3151         current.Apply(attr);
3152         SetAndShowDefaultStyle(current);
3153     }
3154     return true;
3155 }
3156
3157 /// Apply underline to the selection
3158 bool wxRichTextCtrl::ApplyUnderlineToSelection()
3159 {
3160     wxTextAttr attr;
3161     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3162     attr.SetFontUnderlined(!IsSelectionUnderlined());
3163
3164     if (HasSelection())
3165         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3166     else
3167     {
3168         wxRichTextAttr current = GetDefaultStyleEx();
3169         current.Apply(attr);
3170         SetAndShowDefaultStyle(current);
3171     }
3172     return true;
3173 }
3174
3175 /// Is all of the selection aligned according to the specified flag?
3176 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
3177 {
3178     wxRichTextRange range;
3179     if (HasSelection())
3180         range = GetSelectionRange();
3181     else
3182         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
3183
3184     wxTextAttr attr;
3185     attr.SetAlignment(alignment);
3186
3187     return HasParagraphAttributes(range, attr);
3188 }
3189
3190 /// Apply alignment to the selection
3191 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
3192 {
3193     wxTextAttr attr;
3194     attr.SetAlignment(alignment);
3195     if (HasSelection())
3196         return SetStyle(GetSelectionRange(), attr);
3197     else
3198     {
3199         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
3200         if (para)
3201             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
3202     }
3203     return true;
3204 }
3205
3206 /// Apply a named style to the selection
3207 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
3208 {
3209     // Flags are defined within each definition, so only certain
3210     // attributes are applied.
3211     wxTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
3212
3213     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_RESET;
3214
3215     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
3216     {
3217         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3218
3219         wxRichTextRange range;
3220
3221         if (HasSelection())
3222             range = GetSelectionRange();
3223         else
3224         {
3225             long pos = GetAdjustedCaretPosition(GetCaretPosition());
3226             range = wxRichTextRange(pos, pos+1);
3227         }
3228
3229         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
3230     }
3231
3232     // Make sure the attr has the style name
3233     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
3234     {
3235         attr.SetParagraphStyleName(def->GetName());
3236
3237         // If applying a paragraph style, we only want the paragraph nodes to adopt these
3238         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
3239         // to change its style independently.
3240         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3241     }
3242     else
3243         attr.SetCharacterStyleName(def->GetName());
3244
3245     if (HasSelection())
3246         return SetStyleEx(GetSelectionRange(), attr, flags);
3247     else
3248     {
3249         wxRichTextAttr current = GetDefaultStyleEx();
3250         current.Apply(attr);
3251         SetAndShowDefaultStyle(current);
3252         return true;
3253     }
3254 }
3255
3256 /// Apply the style sheet to the buffer, for example if the styles have changed.
3257 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
3258 {
3259     if (!styleSheet)
3260         styleSheet = GetBuffer().GetStyleSheet();
3261     if (!styleSheet)
3262         return false;
3263
3264     if (GetBuffer().ApplyStyleSheet(styleSheet))
3265     {
3266         GetBuffer().Invalidate(wxRICHTEXT_ALL);
3267         Refresh(false);
3268         return true;
3269     }
3270     else
3271         return false;
3272 }
3273
3274 /// Sets the default style to the style under the cursor
3275 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3276 {
3277     wxTextAttr attr;
3278     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3279
3280     // If at the start of a paragraph, use the next position.
3281     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3282
3283     if (GetUncombinedStyle(pos, attr))
3284     {
3285         SetDefaultStyle(attr);
3286         return true;
3287     }
3288
3289     return false;
3290 }
3291
3292 /// Returns the first visible position in the current view
3293 long wxRichTextCtrl::GetFirstVisiblePosition() const
3294 {
3295     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3296     if (line)
3297         return line->GetAbsoluteRange().GetStart();
3298     else
3299         return 0;
3300 }
3301
3302 /// Get the first visible point in the window
3303 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3304 {
3305     int ppuX, ppuY;
3306     int startXUnits, startYUnits;
3307
3308     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3309     GetViewStart(& startXUnits, & startYUnits);
3310
3311     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3312 }
3313
3314 /// The adjusted caret position is the character position adjusted to take
3315 /// into account whether we're at the start of a paragraph, in which case
3316 /// style information should be taken from the next position, not current one.
3317 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3318 {
3319     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3320
3321     if (para && (caretPos+1 == para->GetRange().GetStart()))
3322         caretPos ++;
3323     return caretPos;
3324 }
3325
3326 /// Get/set the selection range in character positions. -1, -1 means no selection.
3327 /// The range is in API convention, i.e. a single character selection is denoted
3328 /// by (n, n+1)
3329 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3330 {
3331     wxRichTextRange range = GetInternalSelectionRange();
3332     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3333         range.SetEnd(range.GetEnd() + 1);
3334     return range;
3335 }
3336
3337 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3338 {
3339     wxRichTextRange range1(range);
3340     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3341         range1.SetEnd(range1.GetEnd() - 1);
3342
3343     wxASSERT( range1.GetStart() > range1.GetEnd() );
3344
3345     SetInternalSelectionRange(range1);
3346 }
3347
3348 /// Set list style
3349 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3350 {
3351     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3352 }
3353
3354 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3355 {
3356     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3357 }
3358
3359 /// Clear list for given range
3360 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3361 {
3362     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3363 }
3364
3365 /// Number/renumber any list elements in the given range
3366 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3367 {
3368     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3369 }
3370
3371 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3372 {
3373     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3374 }
3375
3376 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3377 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3378 {
3379     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3380 }
3381
3382 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3383 {
3384     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3385 }
3386
3387 /// Deletes the content in the given range
3388 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3389 {
3390     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3391 }
3392
3393 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3394 {
3395     if (sm_availableFontNames.GetCount() == 0)
3396     {
3397         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3398         sm_availableFontNames.Sort();
3399     }
3400     return sm_availableFontNames;
3401 }
3402
3403 void wxRichTextCtrl::ClearAvailableFontNames()
3404 {
3405     sm_availableFontNames.Clear();
3406 }
3407
3408 void wxRichTextCtrl::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
3409 {
3410     //wxLogDebug(wxT("wxRichTextCtrl::OnSysColourChanged"));
3411
3412     wxTextAttrEx basicStyle = GetBasicStyle();
3413     basicStyle.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
3414     SetBasicStyle(basicStyle);
3415     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
3416
3417     Refresh();
3418 }
3419
3420 // Refresh the area affected by a selection change
3421 bool wxRichTextCtrl::RefreshForSelectionChange(const wxRichTextRange& oldSelection, const wxRichTextRange& newSelection)
3422 {
3423     // Calculate the refresh rectangle - just the affected lines
3424     long firstPos, lastPos;
3425     if (oldSelection.GetStart() == -2 && newSelection.GetStart() != -2)
3426     {
3427         firstPos = newSelection.GetStart();
3428         lastPos = newSelection.GetEnd();
3429     }
3430     else if (oldSelection.GetStart() != -2 && newSelection.GetStart() == -2)
3431     {
3432         firstPos = oldSelection.GetStart();
3433         lastPos = oldSelection.GetEnd();
3434     }
3435     else if (oldSelection.GetStart() == -2 && newSelection.GetStart() == -2)
3436     {
3437         return false;
3438     }
3439     else
3440     {
3441         firstPos = wxMin(oldSelection.GetStart(), newSelection.GetStart());
3442         lastPos = wxMax(oldSelection.GetEnd(), newSelection.GetEnd());
3443     }
3444
3445     wxRichTextLine* firstLine = GetBuffer().GetLineAtPosition(firstPos);
3446     wxRichTextLine* lastLine = GetBuffer().GetLineAtPosition(lastPos);
3447
3448     if (firstLine && lastLine)
3449     {
3450         wxSize clientSize = GetClientSize();
3451         wxPoint pt1 = GetPhysicalPoint(firstLine->GetAbsolutePosition());
3452         wxPoint pt2 = GetPhysicalPoint(lastLine->GetAbsolutePosition()) + wxPoint(0, lastLine->GetSize().y);
3453
3454         pt1.x = 0;
3455         pt1.y = wxMax(0, pt1.y);
3456         pt2.x = 0;
3457         pt2.y = wxMin(clientSize.y, pt2.y);
3458
3459         wxRect rect(pt1, wxSize(clientSize.x, pt2.y - pt1.y));
3460         RefreshRect(rect, false);
3461     }
3462     else
3463         Refresh(false);
3464
3465     return true;
3466 }
3467
3468 #if wxRICHTEXT_USE_OWN_CARET
3469
3470 // ----------------------------------------------------------------------------
3471 // initialization and destruction
3472 // ----------------------------------------------------------------------------
3473
3474 void wxRichTextCaret::Init()
3475 {
3476     m_hasFocus = true;
3477
3478     m_xOld =
3479     m_yOld = -1;
3480     m_richTextCtrl = NULL;
3481     m_needsUpdate = false;
3482 }
3483
3484 wxRichTextCaret::~wxRichTextCaret()
3485 {
3486 }
3487
3488 // ----------------------------------------------------------------------------
3489 // showing/hiding/moving the caret (base class interface)
3490 // ----------------------------------------------------------------------------
3491
3492 void wxRichTextCaret::DoShow()
3493 {
3494     Refresh();
3495 }
3496
3497 void wxRichTextCaret::DoHide()
3498 {
3499     Refresh();
3500 }
3501
3502 void wxRichTextCaret::DoMove()
3503 {
3504     if (IsVisible())
3505     {
3506         Refresh();
3507
3508         if (m_xOld != -1 && m_yOld != -1)
3509         {
3510             if (m_richTextCtrl)
3511             {
3512                 wxRect rect(GetPosition(), GetSize());
3513                 m_richTextCtrl->RefreshRect(rect, false);
3514             }
3515         }
3516     }
3517
3518     m_xOld = m_x;
3519     m_yOld = m_y;
3520 }
3521
3522 void wxRichTextCaret::DoSize()
3523 {
3524     int countVisible = m_countVisible;
3525     if (countVisible > 0)
3526     {
3527         m_countVisible = 0;
3528         DoHide();
3529     }
3530
3531     if (countVisible > 0)
3532     {
3533         m_countVisible = countVisible;
3534         DoShow();
3535     }
3536 }
3537
3538 // ----------------------------------------------------------------------------
3539 // handling the focus
3540 // ----------------------------------------------------------------------------
3541
3542 void wxRichTextCaret::OnSetFocus()
3543 {
3544     m_hasFocus = true;
3545
3546     if ( IsVisible() )
3547         Refresh();
3548 }
3549
3550 void wxRichTextCaret::OnKillFocus()
3551 {
3552     m_hasFocus = false;
3553 }
3554
3555 // ----------------------------------------------------------------------------
3556 // drawing the caret
3557 // ----------------------------------------------------------------------------
3558
3559 void wxRichTextCaret::Refresh()
3560 {
3561     if (m_richTextCtrl)
3562     {
3563         wxRect rect(GetPosition(), GetSize());
3564         m_richTextCtrl->RefreshRect(rect, false);
3565     }
3566 }
3567
3568 void wxRichTextCaret::DoDraw(wxDC *dc)
3569 {
3570     dc->SetPen( *wxBLACK_PEN );
3571
3572     dc->SetBrush(*(m_hasFocus ? wxBLACK_BRUSH : wxTRANSPARENT_BRUSH));
3573     dc->SetPen(*wxBLACK_PEN);
3574
3575     // VZ: unfortunately, the rectangle comes out a pixel smaller when this is
3576     //     done under wxGTK - no idea why
3577     //dc->SetLogicalFunction(wxINVERT);
3578
3579     wxPoint pt(m_x, m_y);
3580
3581     if (m_richTextCtrl)
3582     {
3583         pt = m_richTextCtrl->GetLogicalPoint(pt);
3584     }
3585     dc->DrawRectangle(pt.x, pt.y, m_width, m_height);
3586 }
3587 #endif
3588     // wxRICHTEXT_USE_OWN_CARET
3589
3590 #endif
3591     // wxUSE_RICHTEXT