src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richeditctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/timer.h"
  30 #include "wx/textfile.h"
  31 #include "wx/ffile.h"
  32 #include "wx/filename.h"
  33 #include "wx/dcbuffer.h"
  34 #include "wx/arrimpl.cpp"
  35 #include "wx/fontenum.h"
  36 #include "wx/accel.h"
  37
  38 // DLL options compatibility check:
  39 #include "wx/app.h"
  40 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  41
  42 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_LEFT_CLICK, wxRichTextEvent );
  43 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK, wxRichTextEvent );
  44 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK, wxRichTextEvent );
  45 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK, wxRichTextEvent );
  46 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_RETURN, wxRichTextEvent );
  47 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CHARACTER, wxRichTextEvent );
  48 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_DELETE, wxRichTextEvent );
  49
  50 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING, wxRichTextEvent );
  51 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED, wxRichTextEvent );
  52 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING, wxRichTextEvent );
  53 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED, wxRichTextEvent );
  54
  55 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED, wxRichTextEvent );
  56 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED, wxRichTextEvent );
  57 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED, wxRichTextEvent );
  58 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED, wxRichTextEvent );
  59 wxDEFINE_EVENT( wxEVT_COMMAND_RICHTEXT_BUFFER_RESET, wxRichTextEvent );
  60
  61 #if wxRICHTEXT_USE_OWN_CARET
  62
  63 /*!
  64  * wxRichTextCaret
  65  *
  66  * This implements a non-flashing cursor in case there
  67  * are platform-specific problems with the generic caret.
  68  * wxRICHTEXT_USE_OWN_CARET is set in richtextbuffer.h.
  69  */
  70
  71 class wxRichTextCaret;
  72 class wxRichTextCaretTimer: public wxTimer
  73 {
  74   public:
  75     wxRichTextCaretTimer(wxRichTextCaret* caret)
  76     {
  77         m_caret = caret;
  78     }
  79     virtual void Notify();
  80     wxRichTextCaret* m_caret;
  81 };
  82
  83 class wxRichTextCaret: public wxCaret
  84 {
  85 public:
  86     // ctors
  87     // -----
  88         // default - use Create()
  89     wxRichTextCaret(): m_timer(this)  { Init(); }
  90         // creates a block caret associated with the given window
  91     wxRichTextCaret(wxRichTextCtrl *window, int width, int height)
  92         : wxCaret(window, width, height), m_timer(this) { Init(); m_richTextCtrl = window; }
  93     wxRichTextCaret(wxRichTextCtrl *window, const wxSize& size)
  94         : wxCaret(window, size), m_timer(this) { Init(); m_richTextCtrl = window; }
  95
  96     virtual ~wxRichTextCaret();
  97
  98     // implementation
  99     // --------------
 100
 101     // called by wxWindow (not using the event tables)
 102     virtual void OnSetFocus();
 103     virtual void OnKillFocus();
 104
 105     // draw the caret on the given DC
 106     void DoDraw(wxDC *dc);
 107
 108     // get the visible count
 109     int GetVisibleCount() const { return m_countVisible; }
 110
 111     // delay repositioning
 112     bool GetNeedsUpdate() const { return m_needsUpdate; }
 113     void SetNeedsUpdate(bool needsUpdate = true ) { m_needsUpdate = needsUpdate; }
 114
 115     void Notify();
 116
 117 protected:
 118     virtual void DoShow();
 119     virtual void DoHide();
 120     virtual void DoMove();
 121     virtual void DoSize();
 122
 123     // refresh the caret
 124     void Refresh();
 125
 126 private:
 127     void Init();
 128
 129     int           m_xOld,
 130                   m_yOld;
 131     bool          m_hasFocus;       // true => our window has focus
 132     bool          m_needsUpdate;    // must be repositioned
 133     bool          m_flashOn;
 134     wxRichTextCaretTimer m_timer;
 135     wxRichTextCtrl* m_richTextCtrl;
 136 };
 137 #endif
 138
 139 IMPLEMENT_DYNAMIC_CLASS( wxRichTextCtrl, wxTextCtrlBase )
 140
 141 IMPLEMENT_DYNAMIC_CLASS( wxRichTextEvent, wxNotifyEvent )
 142
 143 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxTextCtrlBase )
 144     EVT_PAINT(wxRichTextCtrl::OnPaint)
 145     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
 146     EVT_IDLE(wxRichTextCtrl::OnIdle)
 147     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
 148     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
 149     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
 150     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
 151     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
 152     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
 153     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
 154     EVT_CHAR(wxRichTextCtrl::OnChar)
 155     EVT_KEY_DOWN(wxRichTextCtrl::OnChar)
 156     EVT_SIZE(wxRichTextCtrl::OnSize)
 157     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
 158     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
 159     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
 160     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
 161     EVT_SYS_COLOUR_CHANGED(wxRichTextCtrl::OnSysColourChanged)
 162
 163     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
 164     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
 165
 166     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
 167     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
 168
 169     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
 170     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
 171
 172     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
 173     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
 174
 175     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
 176     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
 177
 178     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
 179     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
 180
 181     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
 182     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 183 END_EVENT_TABLE()
 184
 185 /*!
 186  * wxRichTextCtrl
 187  */
 188
 189 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 190
 191 wxRichTextCtrl::wxRichTextCtrl()
 192               : wxScrollHelper(this)
 193 {
 194     Init();
 195 }
 196
 197 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 198                                wxWindowID id,
 199                                const wxString& value,
 200                                const wxPoint& pos,
 201                                const wxSize& size,
 202                                long style,
 203                                const wxValidator& validator,
 204                                const wxString& name)
 205               : wxScrollHelper(this)
 206 {
 207     Init();
 208     Create(parent, id, value, pos, size, style, validator, name);
 209 }
 210
 211 /// Creation
 212 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 213                              const wxValidator& validator, const wxString& name)
 214 {
 215     style |= wxVSCROLL;
 216
 217     if (!wxTextCtrlBase::Create(parent, id, pos, size,
 218                            style|wxFULL_REPAINT_ON_RESIZE,
 219                            validator, name))
 220         return false;
 221
 222     if (!GetFont().Ok())
 223     {
 224         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 225     }
 226
 227     // No physical scrolling, so we can preserve margins
 228     EnableScrolling(false, false);
 229
 230     if (style & wxTE_READONLY)
 231         SetEditable(false);
 232
 233     // The base attributes must all have default values
 234     wxTextAttr attributes;
 235     attributes.SetFont(GetFont());
 236     attributes.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
 237     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 238     attributes.SetLineSpacing(10);
 239     attributes.SetParagraphSpacingAfter(10);
 240     attributes.SetParagraphSpacingBefore(0);
 241
 242     SetBasicStyle(attributes);
 243
 244     // The default attributes will be merged with base attributes, so
 245     // can be empty to begin with
 246     wxTextAttr defaultAttributes;
 247     SetDefaultStyle(defaultAttributes);
 248
 249     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 250     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 251
 252     GetBuffer().Reset();
 253     GetBuffer().SetRichTextCtrl(this);
 254
 255 #if wxRICHTEXT_USE_OWN_CARET
 256     SetCaret(new wxRichTextCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 257 #else
 258     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 259 #endif
 260
 261     // Tell the sizers to use the given or best size
 262     SetInitialSize(size);
 263
 264 #if wxRICHTEXT_BUFFERED_PAINTING
 265     // Create a buffer
 266     RecreateBuffer(size);
 267 #endif
 268
 269     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 270     m_urlCursor = wxCursor(wxCURSOR_HAND);
 271
 272     SetCursor(m_textCursor);
 273
 274     if (!value.IsEmpty())
 275         SetValue(value);
 276
 277     GetBuffer().AddEventHandler(this);
 278
 279     // Accelerators
 280     wxAcceleratorEntry entries[6];
 281
 282     entries[0].Set(wxACCEL_CMD,   (int) 'C',       wxID_COPY);
 283     entries[1].Set(wxACCEL_CMD,   (int) 'X',       wxID_CUT);
 284     entries[2].Set(wxACCEL_CMD,   (int) 'V',       wxID_PASTE);
 285     entries[3].Set(wxACCEL_CMD,   (int) 'A',       wxID_SELECTALL);
 286     entries[4].Set(wxACCEL_CMD,   (int) 'Z',       wxID_UNDO);
 287     entries[5].Set(wxACCEL_CMD,   (int) 'Y',       wxID_REDO);
 288
 289     wxAcceleratorTable accel(6, entries);
 290     SetAcceleratorTable(accel);
 291
 292     m_contextMenu = new wxMenu;
 293     m_contextMenu->Append(wxID_UNDO, _("&Undo"));
 294     m_contextMenu->Append(wxID_REDO, _("&Redo"));
 295     m_contextMenu->AppendSeparator();
 296     m_contextMenu->Append(wxID_CUT, _("Cu&t"));
 297     m_contextMenu->Append(wxID_COPY, _("&Copy"));
 298     m_contextMenu->Append(wxID_PASTE, _("&Paste"));
 299     m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
 300     m_contextMenu->AppendSeparator();
 301     m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
 302
 303     return true;
 304 }
 305
 306 wxRichTextCtrl::~wxRichTextCtrl()
 307 {
 308     GetBuffer().RemoveEventHandler(this);
 309
 310     delete m_contextMenu;
 311 }
 312
 313 /// Member initialisation
 314 void wxRichTextCtrl::Init()
 315 {
 316     m_contextMenu = NULL;
 317     m_caret = NULL;
 318     m_caretPosition = -1;
 319     m_selectionRange.SetRange(-2, -2);
 320     m_selectionAnchor = -2;
 321     m_editable = true;
 322     m_caretAtLineStart = false;
 323     m_dragging = false;
 324     m_fullLayoutRequired = false;
 325     m_fullLayoutTime = 0;
 326     m_fullLayoutSavedPosition = 0;
 327     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 328     m_caretPositionForDefaultStyle = -2;
 329 }
 330
 331 void wxRichTextCtrl::DoThaw()
 332 {
 333     if (GetBuffer().GetDirty())
 334         LayoutContent();
 335     else
 336         SetupScrollbars();
 337
 338     wxWindow::DoThaw();
 339 }
 340
 341 /// Clear all text
 342 void wxRichTextCtrl::Clear()
 343 {
 344     m_buffer.ResetAndClearCommands();
 345     m_buffer.SetDirty(true);
 346     m_caretPosition = -1;
 347     m_caretPositionForDefaultStyle = -2;
 348     m_caretAtLineStart = false;
 349     m_selectionRange.SetRange(-2, -2);
 350
 351     Scroll(0,0);
 352
 353     if (!IsFrozen())
 354     {
 355         LayoutContent();
 356         Refresh(false);
 357     }
 358
 359     wxTextCtrl::SendTextUpdatedEvent(this);
 360 }
 361
 362 /// Painting
 363 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 364 {
 365 #if !wxRICHTEXT_USE_OWN_CARET
 366     if (GetCaret() && !IsFrozen())
 367         GetCaret()->Hide();
 368 #endif
 369
 370     {
 371 #if wxRICHTEXT_BUFFERED_PAINTING
 372         wxBufferedPaintDC dc(this, m_bufferBitmap);
 373 #else
 374         wxPaintDC dc(this);
 375 #endif
 376
 377         if (IsFrozen())
 378             return;
 379
 380         PrepareDC(dc);
 381
 382         dc.SetFont(GetFont());
 383
 384         // Paint the background
 385         PaintBackground(dc);
 386
 387         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 388
 389         wxRect drawingArea(GetUpdateRegion().GetBox());
 390         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 391
 392         wxRect availableSpace(GetClientSize());
 393         if (GetBuffer().GetDirty())
 394         {
 395             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 396             GetBuffer().SetDirty(false);
 397             SetupScrollbars();
 398         }
 399
 400         wxRect clipRect(availableSpace);
 401         clipRect.x += GetBuffer().GetLeftMargin();
 402         clipRect.y += GetBuffer().GetTopMargin();
 403         clipRect.width -= (GetBuffer().GetLeftMargin() + GetBuffer().GetRightMargin());
 404         clipRect.height -= (GetBuffer().GetTopMargin() + GetBuffer().GetBottomMargin());
 405         clipRect.SetPosition(GetLogicalPoint(clipRect.GetPosition()));
 406         dc.SetClippingRegion(clipRect);
 407
 408         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 409
 410         dc.DestroyClippingRegion();
 411
 412         // Other user defined painting after everything else (i.e. all text) is painted
 413         PaintAboveContent(dc);
 414
 415 #if wxRICHTEXT_USE_OWN_CARET
 416         if (GetCaret()->IsVisible())
 417         {
 418             ((wxRichTextCaret*) GetCaret())->DoDraw(& dc);
 419         }
 420 #endif
 421     }
 422
 423 #if !wxRICHTEXT_USE_OWN_CARET
 424     if (GetCaret())
 425         GetCaret()->Show();
 426     PositionCaret();
 427 #endif
 428 }
 429
 430 // Empty implementation, to prevent flicker
 431 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 432 {
 433 }
 434
 435 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 436 {
 437     if (GetCaret())
 438     {
 439 #if !wxRICHTEXT_USE_OWN_CARET
 440         PositionCaret();
 441 #endif
 442         GetCaret()->Show();
 443     }
 444
 445 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 446     // Work around dropouts when control is focused
 447     if (!IsFrozen())
 448     {
 449         Refresh(false);
 450     }
 451 #endif
 452 }
 453
 454 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 455 {
 456     if (GetCaret())
 457         GetCaret()->Hide();
 458
 459 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 460     // Work around dropouts when control is focused
 461     if (!IsFrozen())
 462     {
 463         Refresh(false);
 464     }
 465 #endif
 466 }
 467
 468 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 469 {
 470     m_dragging = false;
 471 }
 472
 473 /// Left-click
 474 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 475 {
 476     SetFocus();
 477
 478     wxClientDC dc(this);
 479     PrepareDC(dc);
 480     dc.SetFont(GetFont());
 481
 482     long position = 0;
 483     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 484
 485     if (hit != wxRICHTEXT_HITTEST_NONE)
 486     {
 487         m_dragStart = event.GetLogicalPosition(dc);
 488         m_dragging = true;
 489         CaptureMouse();
 490
 491         bool caretAtLineStart = false;
 492
 493         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 494         {
 495             // If we're at the start of a line (but not first in para)
 496             // then we should keep the caret showing at the start of the line
 497             // by showing the m_caretAtLineStart flag.
 498             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 499             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 500
 501             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 502                 caretAtLineStart = true;
 503             position --;
 504         }
 505
 506         long oldCaretPos = m_caretPosition;
 507
 508         MoveCaret(position, caretAtLineStart);
 509         SetDefaultStyleToCursorStyle();
 510
 511         if (event.ShiftDown())
 512         {
 513             if (m_selectionRange.GetStart() == -2)
 514                 ExtendSelection(oldCaretPos, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 515             else
 516                 ExtendSelection(m_caretPosition, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 517         }
 518         else
 519             SelectNone();
 520     }
 521
 522     event.Skip();
 523 }
 524
 525 /// Left-up
 526 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 527 {
 528     if (m_dragging)
 529     {
 530         m_dragging = false;
 531         if (GetCapture() == this)
 532             ReleaseMouse();
 533
 534         // See if we clicked on a URL
 535         wxClientDC dc(this);
 536         PrepareDC(dc);
 537         dc.SetFont(GetFont());
 538
 539         long position = 0;
 540         wxPoint logicalPt = event.GetLogicalPosition(dc);
 541         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 542
 543         if ((hit != wxRICHTEXT_HITTEST_NONE) && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 544         {
 545             wxRichTextEvent cmdEvent(
 546                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 547                 GetId());
 548             cmdEvent.SetEventObject(this);
 549             cmdEvent.SetPosition(m_caretPosition+1);
 550
 551             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 552             {
 553                 wxTextAttr attr;
 554                 if (GetStyle(position, attr))
 555                 {
 556                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 557                     {
 558                         wxString urlTarget = attr.GetURL();
 559                         if (!urlTarget.IsEmpty())
 560                         {
 561                             wxMouseEvent mouseEvent(event);
 562
 563                             long startPos = 0, endPos = 0;
 564                             wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 565                             if (obj)
 566                             {
 567                                 startPos = obj->GetRange().GetStart();
 568                                 endPos = obj->GetRange().GetEnd();
 569                             }
 570
 571                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 572                             InitCommandEvent(urlEvent);
 573
 574                             urlEvent.SetString(urlTarget);
 575
 576                             GetEventHandler()->ProcessEvent(urlEvent);
 577                         }
 578                     }
 579                 }
 580             }
 581         }
 582     }
 583 }
 584
 585 /// Left-click
 586 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 587 {
 588     wxClientDC dc(this);
 589     PrepareDC(dc);
 590     dc.SetFont(GetFont());
 591
 592     long position = 0;
 593     wxPoint logicalPt = event.GetLogicalPosition(dc);
 594     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 595
 596     // See if we need to change the cursor
 597
 598     {
 599         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 600         {
 601             wxTextAttr attr;
 602             if (GetStyle(position, attr))
 603             {
 604                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 605                 {
 606                     SetCursor(m_urlCursor);
 607                 }
 608                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 609                 {
 610                     SetCursor(m_textCursor);
 611                 }
 612             }
 613         }
 614         else
 615             SetCursor(m_textCursor);
 616     }
 617
 618     if (!event.Dragging())
 619     {
 620         event.Skip();
 621         return;
 622     }
 623
 624     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 625     {
 626         // TODO: test closeness
 627
 628         bool caretAtLineStart = false;
 629
 630         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 631         {
 632             // If we're at the start of a line (but not first in para)
 633             // then we should keep the caret showing at the start of the line
 634             // by showing the m_caretAtLineStart flag.
 635             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 636             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 637
 638             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 639                 caretAtLineStart = true;
 640             position --;
 641         }
 642
 643         if (m_caretPosition != position)
 644         {
 645             ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 646
 647             MoveCaret(position, caretAtLineStart);
 648             SetDefaultStyleToCursorStyle();
 649         }
 650     }
 651 }
 652
 653 /// Right-click
 654 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 655 {
 656     SetFocus();
 657
 658     wxRichTextEvent cmdEvent(
 659         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 660         GetId());
 661     cmdEvent.SetEventObject(this);
 662     cmdEvent.SetPosition(m_caretPosition+1);
 663
 664     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 665         event.Skip();
 666 }
 667
 668 /// Left-double-click
 669 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 670 {
 671     wxRichTextEvent cmdEvent(
 672         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
 673         GetId());
 674     cmdEvent.SetEventObject(this);
 675     cmdEvent.SetPosition(m_caretPosition+1);
 676
 677     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 678     {
 679         SelectWord(GetCaretPosition()+1);
 680     }
 681 }
 682
 683 /// Middle-click
 684 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 685 {
 686     wxRichTextEvent cmdEvent(
 687         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
 688         GetId());
 689     cmdEvent.SetEventObject(this);
 690     cmdEvent.SetPosition(m_caretPosition+1);
 691
 692     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 693         event.Skip();
 694 }
 695
 696 /// Key press
 697 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 698 {
 699     int flags = 0;
 700     if (event.CmdDown())
 701         flags |= wxRICHTEXT_CTRL_DOWN;
 702     if (event.ShiftDown())
 703         flags |= wxRICHTEXT_SHIFT_DOWN;
 704     if (event.AltDown())
 705         flags |= wxRICHTEXT_ALT_DOWN;
 706
 707     if (event.GetEventType() == wxEVT_KEY_DOWN)
 708     {
 709         if (event.IsKeyInCategory(WXK_CATEGORY_NAVIGATION))
 710         {
 711             KeyboardNavigate(event.GetKeyCode(), flags);
 712             return;
 713         }
 714
 715         long keycode = event.GetKeyCode();
 716         switch ( keycode )
 717         {
 718             case WXK_ESCAPE:
 719             case WXK_START:
 720             case WXK_LBUTTON:
 721             case WXK_RBUTTON:
 722             case WXK_CANCEL:
 723             case WXK_MBUTTON:
 724             case WXK_CLEAR:
 725             case WXK_SHIFT:
 726             case WXK_ALT:
 727             case WXK_CONTROL:
 728             case WXK_MENU:
 729             case WXK_PAUSE:
 730             case WXK_CAPITAL:
 731             case WXK_END:
 732             case WXK_HOME:
 733             case WXK_LEFT:
 734             case WXK_UP:
 735             case WXK_RIGHT:
 736             case WXK_DOWN:
 737             case WXK_SELECT:
 738             case WXK_PRINT:
 739             case WXK_EXECUTE:
 740             case WXK_SNAPSHOT:
 741             case WXK_INSERT:
 742             case WXK_HELP:
 743             case WXK_F1:
 744             case WXK_F2:
 745             case WXK_F3:
 746             case WXK_F4:
 747             case WXK_F5:
 748             case WXK_F6:
 749             case WXK_F7:
 750             case WXK_F8:
 751             case WXK_F9:
 752             case WXK_F10:
 753             case WXK_F11:
 754             case WXK_F12:
 755             case WXK_F13:
 756             case WXK_F14:
 757             case WXK_F15:
 758             case WXK_F16:
 759             case WXK_F17:
 760             case WXK_F18:
 761             case WXK_F19:
 762             case WXK_F20:
 763             case WXK_F21:
 764             case WXK_F22:
 765             case WXK_F23:
 766             case WXK_F24:
 767             case WXK_NUMLOCK:
 768             case WXK_SCROLL:
 769             case WXK_PAGEUP:
 770             case WXK_PAGEDOWN:
 771             case WXK_NUMPAD_F1:
 772             case WXK_NUMPAD_F2:
 773             case WXK_NUMPAD_F3:
 774             case WXK_NUMPAD_F4:
 775             case WXK_NUMPAD_HOME:
 776             case WXK_NUMPAD_LEFT:
 777             case WXK_NUMPAD_UP:
 778             case WXK_NUMPAD_RIGHT:
 779             case WXK_NUMPAD_DOWN:
 780             case WXK_NUMPAD_PAGEUP:
 781             case WXK_NUMPAD_PAGEDOWN:
 782             case WXK_NUMPAD_END:
 783             case WXK_NUMPAD_BEGIN:
 784             case WXK_NUMPAD_INSERT:
 785             case WXK_WINDOWS_LEFT:
 786             {
 787                 return;
 788             }
 789             default:
 790             {
 791             }
 792         }
 793
 794         // Must process this before translation, otherwise it's translated into a WXK_DELETE event.
 795         if (event.CmdDown() && event.GetKeyCode() == WXK_BACK)
 796         {
 797             BeginBatchUndo(_("Delete Text"));
 798
 799             long newPos = m_caretPosition;
 800
 801             bool processed = DeleteSelectedContent(& newPos);
 802
 803             // Submit range in character positions, which are greater than caret positions,
 804             // so subtract 1 for deleted character and add 1 for conversion to character position.
 805             if (newPos > -1)
 806             {
 807                 if (event.CmdDown())
 808                 {
 809                     long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 810                     if (pos < newPos)
 811                     {
 812                         GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this);
 813                         processed = true;
 814                     }
 815                 }
 816
 817                 if (!processed)
 818                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this);
 819             }
 820
 821             EndBatchUndo();
 822
 823             if (GetLastPosition() == -1)
 824             {
 825                 GetBuffer().Reset();
 826
 827                 m_caretPosition = -1;
 828                 PositionCaret();
 829                 SetDefaultStyleToCursorStyle();
 830             }
 831
 832             ScrollIntoView(m_caretPosition, WXK_LEFT);
 833
 834             wxRichTextEvent cmdEvent(
 835                 wxEVT_COMMAND_RICHTEXT_DELETE,
 836                 GetId());
 837             cmdEvent.SetEventObject(this);
 838             cmdEvent.SetFlags(flags);
 839             cmdEvent.SetPosition(m_caretPosition+1);
 840             GetEventHandler()->ProcessEvent(cmdEvent);
 841
 842             Update();
 843         }
 844         else
 845             event.Skip();
 846
 847         return;
 848     }
 849
 850     // all the other keys modify the controls contents which shouldn't be
 851     // possible if we're read-only
 852     if ( !IsEditable() )
 853     {
 854         event.Skip();
 855         return;
 856     }
 857
 858     if (event.GetKeyCode() == WXK_RETURN)
 859     {
 860         BeginBatchUndo(_("Insert Text"));
 861
 862         long newPos = m_caretPosition;
 863
 864         DeleteSelectedContent(& newPos);
 865
 866         if (event.ShiftDown())
 867         {
 868             wxString text;
 869             text = wxRichTextLineBreakChar;
 870             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 871             m_caretAtLineStart = true;
 872             PositionCaret();
 873         }
 874         else
 875             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE|wxRICHTEXT_INSERT_INTERACTIVE);
 876
 877         EndBatchUndo();
 878         SetDefaultStyleToCursorStyle();
 879
 880         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 881
 882         wxRichTextEvent cmdEvent(
 883             wxEVT_COMMAND_RICHTEXT_RETURN,
 884             GetId());
 885         cmdEvent.SetEventObject(this);
 886         cmdEvent.SetFlags(flags);
 887         cmdEvent.SetPosition(newPos+1);
 888
 889         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 890         {
 891             // Generate conventional event
 892             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 893             InitCommandEvent(textEvent);
 894
 895             GetEventHandler()->ProcessEvent(textEvent);
 896         }
 897         Update();
 898     }
 899     else if (event.GetKeyCode() == WXK_BACK)
 900     {
 901         BeginBatchUndo(_("Delete Text"));
 902
 903         long newPos = m_caretPosition;
 904
 905         bool processed = DeleteSelectedContent(& newPos);
 906
 907         // Submit range in character positions, which are greater than caret positions,
 908         // so subtract 1 for deleted character and add 1 for conversion to character position.
 909         if (newPos > -1)
 910         {
 911             if (event.CmdDown())
 912             {
 913                 long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 914                 if (pos < newPos)
 915                 {
 916                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this);
 917                     processed = true;
 918                 }
 919             }
 920
 921             if (!processed)
 922                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this);
 923         }
 924
 925         EndBatchUndo();
 926
 927         if (GetLastPosition() == -1)
 928         {
 929             GetBuffer().Reset();
 930
 931             m_caretPosition = -1;
 932             PositionCaret();
 933             SetDefaultStyleToCursorStyle();
 934         }
 935
 936         ScrollIntoView(m_caretPosition, WXK_LEFT);
 937
 938         wxRichTextEvent cmdEvent(
 939             wxEVT_COMMAND_RICHTEXT_DELETE,
 940             GetId());
 941         cmdEvent.SetEventObject(this);
 942         cmdEvent.SetFlags(flags);
 943         cmdEvent.SetPosition(m_caretPosition+1);
 944         GetEventHandler()->ProcessEvent(cmdEvent);
 945
 946         Update();
 947     }
 948     else if (event.GetKeyCode() == WXK_DELETE)
 949     {
 950         BeginBatchUndo(_("Delete Text"));
 951
 952         long newPos = m_caretPosition;
 953
 954         bool processed = DeleteSelectedContent(& newPos);
 955
 956         // Submit range in character positions, which are greater than caret positions,
 957         if (newPos < GetBuffer().GetRange().GetEnd()+1)
 958         {
 959             if (event.CmdDown())
 960             {
 961                 long pos = wxRichTextCtrl::FindNextWordPosition(1);
 962                 if (pos != -1 && (pos > newPos))
 963                 {
 964                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos+1, pos), this);
 965                     processed = true;
 966                 }
 967             }
 968
 969             if (!processed && newPos < (GetLastPosition()-1))
 970                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos+1, newPos+1), this);
 971         }
 972
 973         EndBatchUndo();
 974
 975         if (GetLastPosition() == -1)
 976         {
 977             GetBuffer().Reset();
 978
 979             m_caretPosition = -1;
 980             PositionCaret();
 981             SetDefaultStyleToCursorStyle();
 982         }
 983
 984         wxRichTextEvent cmdEvent(
 985             wxEVT_COMMAND_RICHTEXT_DELETE,
 986             GetId());
 987         cmdEvent.SetEventObject(this);
 988         cmdEvent.SetFlags(flags);
 989         cmdEvent.SetPosition(m_caretPosition+1);
 990         GetEventHandler()->ProcessEvent(cmdEvent);
 991
 992         Update();
 993     }
 994     else
 995     {
 996         long keycode = event.GetKeyCode();
 997         switch ( keycode )
 998         {
 999             case WXK_ESCAPE:
1000             {
1001                 event.Skip();
1002                 return;
1003             }
1004
1005             default:
1006             {
1007 #ifdef __WXMAC__
1008                 if (event.CmdDown())
1009 #else
1010                 // Fixes AltGr+key with European input languages on Windows
1011                 if ((event.CmdDown() && !event.AltDown()) || (event.AltDown() && !event.CmdDown()))
1012 #endif
1013                 {
1014                     event.Skip();
1015                     return;
1016                 }
1017
1018                 wxRichTextEvent cmdEvent(
1019                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
1020                     GetId());
1021                 cmdEvent.SetEventObject(this);
1022                 cmdEvent.SetFlags(flags);
1023 #if wxUSE_UNICODE
1024                 cmdEvent.SetCharacter(event.GetUnicodeKey());
1025 #else
1026                 cmdEvent.SetCharacter((wxChar) keycode);
1027 #endif
1028                 cmdEvent.SetPosition(m_caretPosition+1);
1029
1030                 if (keycode == wxT('\t'))
1031                 {
1032                     // See if we need to promote or demote the selection or paragraph at the cursor
1033                     // position, instead of inserting a tab.
1034                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
1035                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
1036                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
1037                     {
1038                         wxRichTextRange range;
1039                         if (HasSelection())
1040                             range = GetSelectionRange();
1041                         else
1042                             range = para->GetRange().FromInternal();
1043
1044                         int promoteBy = event.ShiftDown() ? 1 : -1;
1045
1046                         PromoteList(promoteBy, range, NULL);
1047
1048                         GetEventHandler()->ProcessEvent(cmdEvent);
1049
1050                         return;
1051                     }
1052                 }
1053
1054                 BeginBatchUndo(_("Insert Text"));
1055
1056                 long newPos = m_caretPosition;
1057                 DeleteSelectedContent(& newPos);
1058
1059 #if wxUSE_UNICODE
1060                 wxString str = event.GetUnicodeKey();
1061 #else
1062                 wxString str = (wxChar) event.GetKeyCode();
1063 #endif
1064                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
1065
1066                 EndBatchUndo();
1067
1068                 SetDefaultStyleToCursorStyle();
1069                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
1070
1071                 GetEventHandler()->ProcessEvent(cmdEvent);
1072
1073                 Update();
1074             }
1075         }
1076     }
1077 }
1078
1079 /// Delete content if there is a selection, e.g. when pressing a key.
1080 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
1081 {
1082     if (HasSelection())
1083     {
1084         long pos = m_selectionRange.GetStart();
1085         wxRichTextRange range = m_selectionRange;
1086
1087         // SelectAll causes more to be selected than doing it interactively,
1088         // and causes a new paragraph to be inserted. So for multiline buffers,
1089         // don't delete the final position.
1090         if (range.GetEnd() == GetLastPosition() && GetNumberOfLines() > 0)
1091             range.SetEnd(range.GetEnd()-1);
1092
1093         GetBuffer().DeleteRangeWithUndo(range, this);
1094         m_selectionRange.SetRange(-2, -2);
1095
1096         if (newPos)
1097             *newPos = pos-1;
1098         return true;
1099     }
1100     else
1101         return false;
1102 }
1103
1104 /// Keyboard navigation
1105
1106 /*
1107
1108 Left:       left one character
1109 Right:      right one character
1110 Up:         up one line
1111 Down:       down one line
1112 Ctrl-Left:  left one word
1113 Ctrl-Right: right one word
1114 Ctrl-Up:    previous paragraph start
1115 Ctrl-Down:  next start of paragraph
1116 Home:       start of line
1117 End:        end of line
1118 Ctrl-Home:  start of document
1119 Ctrl-End:   end of document
1120 Page-Up:    Up a screen
1121 Page-Down:  Down a screen
1122
1123 Maybe:
1124
1125 Ctrl-Alt-PgUp: Start of window
1126 Ctrl-Alt-PgDn: End of window
1127 F8:         Start selection mode
1128 Esc:        End selection mode
1129
1130 Adding Shift does the above but starts/extends selection.
1131
1132
1133  */
1134
1135 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
1136 {
1137     bool success = false;
1138
1139     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
1140     {
1141         if (flags & wxRICHTEXT_CTRL_DOWN)
1142             success = WordRight(1, flags);
1143         else
1144             success = MoveRight(1, flags);
1145     }
1146     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
1147     {
1148         if (flags & wxRICHTEXT_CTRL_DOWN)
1149             success = WordLeft(1, flags);
1150         else
1151             success = MoveLeft(1, flags);
1152     }
1153     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
1154     {
1155         if (flags & wxRICHTEXT_CTRL_DOWN)
1156             success = MoveToParagraphStart(flags);
1157         else
1158             success = MoveUp(1, flags);
1159     }
1160     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
1161     {
1162         if (flags & wxRICHTEXT_CTRL_DOWN)
1163             success = MoveToParagraphEnd(flags);
1164         else
1165             success = MoveDown(1, flags);
1166     }
1167     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
1168     {
1169         success = PageUp(1, flags);
1170     }
1171     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1172     {
1173         success = PageDown(1, flags);
1174     }
1175     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
1176     {
1177         if (flags & wxRICHTEXT_CTRL_DOWN)
1178             success = MoveHome(flags);
1179         else
1180             success = MoveToLineStart(flags);
1181     }
1182     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
1183     {
1184         if (flags & wxRICHTEXT_CTRL_DOWN)
1185             success = MoveEnd(flags);
1186         else
1187             success = MoveToLineEnd(flags);
1188     }
1189
1190     if (success)
1191     {
1192         ScrollIntoView(m_caretPosition, keyCode);
1193         SetDefaultStyleToCursorStyle();
1194     }
1195
1196     return success;
1197 }
1198
1199 /// Extend the selection. Selections are in caret positions.
1200 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
1201 {
1202     if (flags & wxRICHTEXT_SHIFT_DOWN)
1203     {
1204         if (oldPos == newPos)
1205             return false;
1206
1207         wxRichTextRange oldSelection = m_selectionRange;
1208
1209         // If not currently selecting, start selecting
1210         if (m_selectionRange.GetStart() == -2)
1211         {
1212             m_selectionAnchor = oldPos;
1213
1214             if (oldPos > newPos)
1215                 m_selectionRange.SetRange(newPos+1, oldPos);
1216             else
1217                 m_selectionRange.SetRange(oldPos+1, newPos);
1218         }
1219         else
1220         {
1221             // Always ensure that the selection range start is greater than
1222             // the end.
1223             if (newPos > m_selectionAnchor)
1224                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
1225             else if (newPos == m_selectionAnchor)
1226                 m_selectionRange = wxRichTextRange(-2, -2);
1227             else
1228                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
1229         }
1230
1231         RefreshForSelectionChange(oldSelection, m_selectionRange);
1232
1233         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
1234         {
1235             wxLogDebug(wxT("Strange selection range"));
1236         }
1237
1238         return true;
1239     }
1240     else
1241         return false;
1242 }
1243
1244 /// Scroll into view, returning true if we scrolled.
1245 /// This takes a _caret_ position.
1246 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1247 {
1248     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1249
1250     if (!line)
1251         return false;
1252
1253     int ppuX, ppuY;
1254     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1255
1256     int startXUnits, startYUnits;
1257     GetViewStart(& startXUnits, & startYUnits);
1258     int startY = startYUnits * ppuY;
1259
1260     int sx = 0, sy = 0;
1261     GetVirtualSize(& sx, & sy);
1262     int sxUnits = 0;
1263     int syUnits = 0;
1264     if (ppuY != 0)
1265         syUnits = sy/ppuY;
1266
1267     wxRect rect = line->GetRect();
1268
1269     bool scrolled = false;
1270
1271     wxSize clientSize = GetClientSize();
1272     clientSize.y -= GetBuffer().GetBottomMargin();
1273
1274     if (GetWindowStyle() & wxRE_CENTRE_CARET)
1275     {
1276         int y = rect.y - GetClientSize().y/2;
1277         int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1278         if (y >= 0 && (y + clientSize.y) < GetBuffer().GetCachedSize().y)
1279         {
1280             if (startYUnits != yUnits)
1281             {
1282                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1283                 scrolled = true;
1284             }
1285 #if !wxRICHTEXT_USE_OWN_CARET
1286             if (scrolled)
1287 #endif
1288                 PositionCaret();
1289
1290             return scrolled;
1291         }
1292     }
1293
1294     // Going down
1295     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1296         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1297         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1298         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1299     {
1300         if ((rect.y + rect.height) > (clientSize.y + startY))
1301         {
1302             // Make it scroll so this item is at the bottom
1303             // of the window
1304             int y = rect.y - (clientSize.y - rect.height);
1305             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1306
1307             // If we're still off the screen, scroll another line down
1308             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1309                 yUnits ++;
1310
1311             if (startYUnits != yUnits)
1312             {
1313                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1314                 scrolled = true;
1315             }
1316         }
1317         else if (rect.y < (startY + GetBuffer().GetTopMargin()))
1318         {
1319             // Make it scroll so this item is at the top
1320             // of the window
1321             int y = rect.y - GetBuffer().GetTopMargin();
1322             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1323
1324             if (startYUnits != yUnits)
1325             {
1326                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1327                 scrolled = true;
1328             }
1329         }
1330     }
1331     // Going up
1332     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1333              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1334              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1335              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1336     {
1337         if (rect.y < (startY + GetBuffer().GetBottomMargin()))
1338         {
1339             // Make it scroll so this item is at the top
1340             // of the window
1341             int y = rect.y - GetBuffer().GetTopMargin();
1342             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1343
1344             if (startYUnits != yUnits)
1345             {
1346                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1347                 scrolled = true;
1348             }
1349         }
1350         else if ((rect.y + rect.height) > (clientSize.y + startY))
1351         {
1352             // Make it scroll so this item is at the bottom
1353             // of the window
1354             int y = rect.y - (clientSize.y - rect.height);
1355             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1356
1357             // If we're still off the screen, scroll another line down
1358             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1359                 yUnits ++;
1360
1361             if (startYUnits != yUnits)
1362             {
1363                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1364                 scrolled = true;
1365             }
1366         }
1367     }
1368
1369 #if !wxRICHTEXT_USE_OWN_CARET
1370     if (scrolled)
1371 #endif
1372         PositionCaret();
1373
1374     return scrolled;
1375 }
1376
1377 /// Is the given position visible on the screen?
1378 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1379 {
1380     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1381
1382     if (!line)
1383         return false;
1384
1385     int ppuX, ppuY;
1386     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1387
1388     int startX, startY;
1389     GetViewStart(& startX, & startY);
1390     startX = 0;
1391     startY = startY * ppuY;
1392
1393     wxRect rect = line->GetRect();
1394     wxSize clientSize = GetClientSize();
1395     clientSize.y -= GetBuffer().GetBottomMargin();
1396
1397     return (rect.GetBottom() > (startY + GetBuffer().GetTopMargin())) && (rect.GetTop() < (startY + clientSize.y));
1398 }
1399
1400 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1401 {
1402     m_caretPosition = position;
1403     m_caretAtLineStart = showAtLineStart;
1404 }
1405
1406 /// Move caret one visual step forward: this may mean setting a flag
1407 /// and keeping the same position if we're going from the end of one line
1408 /// to the start of the next, which may be the exact same caret position.
1409 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1410 {
1411     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1412
1413     // Only do the check if we're not at the end of the paragraph (where things work OK
1414     // anyway)
1415     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1416     {
1417         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1418
1419         if (line)
1420         {
1421             wxRichTextRange lineRange = line->GetAbsoluteRange();
1422
1423             // We're at the end of a line. See whether we need to
1424             // stay at the same actual caret position but change visual
1425             // position, or not.
1426             if (oldPosition == lineRange.GetEnd())
1427             {
1428                 if (m_caretAtLineStart)
1429                 {
1430                     // We're already at the start of the line, so actually move on now.
1431                     m_caretPosition = oldPosition + 1;
1432                     m_caretAtLineStart = false;
1433                 }
1434                 else
1435                 {
1436                     // We're showing at the end of the line, so keep to
1437                     // the same position but indicate that we're to show
1438                     // at the start of the next line.
1439                     m_caretPosition = oldPosition;
1440                     m_caretAtLineStart = true;
1441                 }
1442                 SetDefaultStyleToCursorStyle();
1443                 return;
1444             }
1445         }
1446     }
1447     m_caretPosition ++;
1448     SetDefaultStyleToCursorStyle();
1449 }
1450
1451 /// Move caret one visual step backward: this may mean setting a flag
1452 /// and keeping the same position if we're going from the end of one line
1453 /// to the start of the next, which may be the exact same caret position.
1454 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1455 {
1456     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1457
1458     // Only do the check if we're not at the start of the paragraph (where things work OK
1459     // anyway)
1460     if (para && (oldPosition != para->GetRange().GetStart()))
1461     {
1462         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1463
1464         if (line)
1465         {
1466             wxRichTextRange lineRange = line->GetAbsoluteRange();
1467
1468             // We're at the start of a line. See whether we need to
1469             // stay at the same actual caret position but change visual
1470             // position, or not.
1471             if (oldPosition == lineRange.GetStart())
1472             {
1473                 m_caretPosition = oldPosition-1;
1474                 m_caretAtLineStart = true;
1475                 return;
1476             }
1477             else if (oldPosition == lineRange.GetEnd())
1478             {
1479                 if (m_caretAtLineStart)
1480                 {
1481                     // We're at the start of the line, so keep the same caret position
1482                     // but clear the start-of-line flag.
1483                     m_caretPosition = oldPosition;
1484                     m_caretAtLineStart = false;
1485                 }
1486                 else
1487                 {
1488                     // We're showing at the end of the line, so go back
1489                     // to the previous character position.
1490                     m_caretPosition = oldPosition - 1;
1491                 }
1492                 SetDefaultStyleToCursorStyle();
1493                 return;
1494             }
1495         }
1496     }
1497     m_caretPosition --;
1498     SetDefaultStyleToCursorStyle();
1499 }
1500
1501 /// Move right
1502 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1503 {
1504     long endPos = GetBuffer().GetRange().GetEnd();
1505
1506     if (m_caretPosition + noPositions < endPos)
1507     {
1508         long oldPos = m_caretPosition;
1509         long newPos = m_caretPosition + noPositions;
1510
1511         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1512         if (!extendSel)
1513             SelectNone();
1514
1515         // Determine by looking at oldPos and m_caretPosition whether
1516         // we moved from the end of a line to the start of the next line, in which case
1517         // we want to adjust the caret position such that it is positioned at the
1518         // start of the next line, rather than jumping past the first character of the
1519         // line.
1520         if (noPositions == 1 && !extendSel)
1521             MoveCaretForward(oldPos);
1522         else
1523             SetCaretPosition(newPos);
1524
1525         PositionCaret();
1526         SetDefaultStyleToCursorStyle();
1527
1528         return true;
1529     }
1530     else
1531         return false;
1532 }
1533
1534 /// Move left
1535 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1536 {
1537     long startPos = -1;
1538
1539     if (m_caretPosition > startPos - noPositions + 1)
1540     {
1541         long oldPos = m_caretPosition;
1542         long newPos = m_caretPosition - noPositions;
1543         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1544         if (!extendSel)
1545             SelectNone();
1546
1547         if (noPositions == 1 && !extendSel)
1548             MoveCaretBack(oldPos);
1549         else
1550             SetCaretPosition(newPos);
1551
1552         PositionCaret();
1553         SetDefaultStyleToCursorStyle();
1554
1555         return true;
1556     }
1557     else
1558         return false;
1559 }
1560
1561 /// Move up
1562 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1563 {
1564     return MoveDown(- noLines, flags);
1565 }
1566
1567 /// Move up
1568 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1569 {
1570     if (!GetCaret())
1571         return false;
1572
1573     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1574     wxPoint pt = GetCaret()->GetPosition();
1575     long newLine = lineNumber + noLines;
1576
1577     if (lineNumber != -1)
1578     {
1579         if (noLines > 0)
1580         {
1581             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1582
1583             if (newLine > lastLine)
1584                 return false;
1585         }
1586         else
1587         {
1588             if (newLine < 0)
1589                 return false;
1590         }
1591     }
1592
1593     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1594     if (lineObj)
1595     {
1596         pt.y = lineObj->GetAbsolutePosition().y + 2;
1597     }
1598     else
1599         return false;
1600
1601     long newPos = 0;
1602     wxClientDC dc(this);
1603     PrepareDC(dc);
1604     dc.SetFont(GetFont());
1605
1606     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1607
1608     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1609     {
1610         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1611         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1612         // so we view the caret at the start of the line.
1613         bool caretLineStart = false;
1614         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1615         {
1616             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1617             wxRichTextRange lineRange;
1618             if (thisLine)
1619                 lineRange = thisLine->GetAbsoluteRange();
1620
1621             if (thisLine && (newPos-1) == lineRange.GetEnd())
1622             {
1623                 newPos --;
1624                 caretLineStart = true;
1625             }
1626             else
1627             {
1628                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1629                 if (para && para->GetRange().GetStart() == newPos)
1630                     newPos --;
1631             }
1632         }
1633
1634         long newSelEnd = newPos;
1635
1636         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1637         if (!extendSel)
1638             SelectNone();
1639
1640         SetCaretPosition(newPos, caretLineStart);
1641         PositionCaret();
1642         SetDefaultStyleToCursorStyle();
1643
1644         return true;
1645     }
1646
1647     return false;
1648 }
1649
1650 /// Move to the end of the paragraph
1651 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1652 {
1653     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1654     if (para)
1655     {
1656         long newPos = para->GetRange().GetEnd() - 1;
1657         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1658         if (!extendSel)
1659             SelectNone();
1660
1661         SetCaretPosition(newPos);
1662         PositionCaret();
1663         SetDefaultStyleToCursorStyle();
1664
1665         return true;
1666     }
1667
1668     return false;
1669 }
1670
1671 /// Move to the start of the paragraph
1672 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1673 {
1674     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1675     if (para)
1676     {
1677         long newPos = para->GetRange().GetStart() - 1;
1678         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1679         if (!extendSel)
1680             SelectNone();
1681
1682         SetCaretPosition(newPos);
1683         PositionCaret();
1684         SetDefaultStyleToCursorStyle();
1685
1686         return true;
1687     }
1688
1689     return false;
1690 }
1691
1692 /// Move to the end of the line
1693 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1694 {
1695     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1696
1697     if (line)
1698     {
1699         wxRichTextRange lineRange = line->GetAbsoluteRange();
1700         long newPos = lineRange.GetEnd();
1701         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1702         if (!extendSel)
1703             SelectNone();
1704
1705         SetCaretPosition(newPos);
1706         PositionCaret();
1707         SetDefaultStyleToCursorStyle();
1708
1709         return true;
1710     }
1711
1712     return false;
1713 }
1714
1715 /// Move to the start of the line
1716 bool wxRichTextCtrl::MoveToLineStart(int flags)
1717 {
1718     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1719     if (line)
1720     {
1721         wxRichTextRange lineRange = line->GetAbsoluteRange();
1722         long newPos = lineRange.GetStart()-1;
1723
1724         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1725         if (!extendSel)
1726             SelectNone();
1727
1728         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1729
1730         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1731         PositionCaret();
1732         SetDefaultStyleToCursorStyle();
1733
1734         return true;
1735     }
1736
1737     return false;
1738 }
1739
1740 /// Move to the start of the buffer
1741 bool wxRichTextCtrl::MoveHome(int flags)
1742 {
1743     if (m_caretPosition != -1)
1744     {
1745         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1746         if (!extendSel)
1747             SelectNone();
1748
1749         SetCaretPosition(-1);
1750         PositionCaret();
1751         SetDefaultStyleToCursorStyle();
1752
1753         return true;
1754     }
1755     else
1756         return false;
1757 }
1758
1759 /// Move to the end of the buffer
1760 bool wxRichTextCtrl::MoveEnd(int flags)
1761 {
1762     long endPos = GetBuffer().GetRange().GetEnd()-1;
1763
1764     if (m_caretPosition != endPos)
1765     {
1766         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1767         if (!extendSel)
1768             SelectNone();
1769
1770         SetCaretPosition(endPos);
1771         PositionCaret();
1772         SetDefaultStyleToCursorStyle();
1773
1774         return true;
1775     }
1776     else
1777         return false;
1778 }
1779
1780 /// Move noPages pages up
1781 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1782 {
1783     return PageDown(- noPages, flags);
1784 }
1785
1786 /// Move noPages pages down
1787 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1788 {
1789     // Calculate which line occurs noPages * screen height further down.
1790     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1791     if (line)
1792     {
1793         wxSize clientSize = GetClientSize();
1794         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1795
1796         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1797         if (newLine)
1798         {
1799             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1800             long pos = lineRange.GetStart()-1;
1801             if (pos != m_caretPosition)
1802             {
1803                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1804
1805                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1806                 if (!extendSel)
1807                     SelectNone();
1808
1809                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1810                 PositionCaret();
1811                 SetDefaultStyleToCursorStyle();
1812
1813                 return true;
1814             }
1815         }
1816     }
1817
1818     return false;
1819 }
1820
1821 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1822 {
1823     return str == wxT(" ") || str == wxT("\t");
1824 }
1825
1826 // Finds the caret position for the next word
1827 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1828 {
1829     long endPos = GetBuffer().GetRange().GetEnd();
1830
1831     if (direction > 0)
1832     {
1833         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1834
1835         // First skip current text to space
1836         while (i < endPos && i > -1)
1837         {
1838             // i is in character, not caret positions
1839             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1840             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1841             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1842             {
1843                 break;
1844             }
1845             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1846                 i += direction;
1847             else
1848             {
1849                 break;
1850             }
1851         }
1852         while (i < endPos && i > -1)
1853         {
1854             // i is in character, not caret positions
1855             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1856             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1857             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1858                 return wxMax(-1, i);
1859
1860             if (text.empty()) // End of paragraph, or maybe an image
1861                 return wxMax(-1, i - 1);
1862             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1863                 i += direction;
1864             else
1865             {
1866                 // Convert to caret position
1867                 return wxMax(-1, i - 1);
1868             }
1869         }
1870         if (i >= endPos)
1871             return endPos-1;
1872         return i-1;
1873     }
1874     else
1875     {
1876         long i = m_caretPosition;
1877
1878         // First skip white space
1879         while (i < endPos && i > -1)
1880         {
1881             // i is in character, not caret positions
1882             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1883             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1884
1885             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1886                 break;
1887             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1888                 i += direction;
1889             else
1890                 break;
1891         }
1892         // Next skip current text to space
1893         while (i < endPos && i > -1)
1894         {
1895             // i is in character, not caret positions
1896             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1897             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1898             if (line && line->GetAbsoluteRange().GetStart() == i)
1899                 return i-1;
1900
1901             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1902                 i += direction;
1903             else
1904             {
1905                 return i;
1906             }
1907         }
1908         if (i < -1)
1909             return -1;
1910         return i;
1911     }
1912 }
1913
1914 /// Move n words left
1915 bool wxRichTextCtrl::WordLeft(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 /// Move n words right
1937 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1938 {
1939     long pos = FindNextWordPosition(1);
1940     if (pos != m_caretPosition)
1941     {
1942         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1943
1944         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1945         if (!extendSel)
1946             SelectNone();
1947
1948         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1949         PositionCaret();
1950         SetDefaultStyleToCursorStyle();
1951
1952         return true;
1953     }
1954
1955     return false;
1956 }
1957
1958 /// Sizing
1959 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1960 {
1961     // Only do sizing optimization for large buffers
1962     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1963     {
1964         m_fullLayoutRequired = true;
1965         m_fullLayoutTime = wxGetLocalTimeMillis();
1966         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1967         LayoutContent(true /* onlyVisibleRect */);
1968     }
1969     else
1970         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1971
1972 #if wxRICHTEXT_BUFFERED_PAINTING
1973     RecreateBuffer();
1974 #endif
1975
1976     event.Skip();
1977 }
1978
1979
1980 /// Idle-time processing
1981 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1982 {
1983 #if wxRICHTEXT_USE_OWN_CARET
1984     if (((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
1985     {
1986         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate(false);
1987         PositionCaret();
1988         GetCaret()->Show();
1989     }
1990 #endif
1991
1992     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1993
1994     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1995     {
1996         m_fullLayoutRequired = false;
1997         m_fullLayoutTime = 0;
1998         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1999         ShowPosition(m_fullLayoutSavedPosition);
2000         Refresh(false);
2001     }
2002
2003     if (m_caretPositionForDefaultStyle != -2)
2004     {
2005         // If the caret position has changed, no longer reflect the default style
2006         // in the UI.
2007         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
2008             m_caretPositionForDefaultStyle = -2;
2009     }
2010
2011     event.Skip();
2012 }
2013
2014 /// Scrolling
2015 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
2016 {
2017 #if wxRICHTEXT_USE_OWN_CARET
2018     if (!((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
2019     {
2020         GetCaret()->Hide();
2021         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate();
2022     }
2023 #endif
2024
2025     event.Skip();
2026 }
2027
2028 /// Set up scrollbars, e.g. after a resize
2029 void wxRichTextCtrl::SetupScrollbars(bool atTop)
2030 {
2031     if (IsFrozen())
2032         return;
2033
2034     if (GetBuffer().IsEmpty())
2035     {
2036         SetScrollbars(0, 0, 0, 0, 0, 0);
2037         return;
2038     }
2039
2040     // TODO: reimplement scrolling so we scroll by line, not by fixed number
2041     // of pixels. See e.g. wxVScrolledWindow for ideas.
2042     int pixelsPerUnit = 5;
2043     wxSize clientSize = GetClientSize();
2044
2045     int maxHeight = GetBuffer().GetCachedSize().y + GetBuffer().GetTopMargin();
2046
2047     // Round up so we have at least maxHeight pixels
2048     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
2049
2050     int startX = 0, startY = 0;
2051     if (!atTop)
2052         GetViewStart(& startX, & startY);
2053
2054     int maxPositionX = 0;
2055     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
2056
2057     int newStartX = wxMin(maxPositionX, startX);
2058     int newStartY = wxMin(maxPositionY, startY);
2059
2060     int oldPPUX, oldPPUY;
2061     int oldStartX, oldStartY;
2062     int oldVirtualSizeX = 0, oldVirtualSizeY = 0;
2063     GetScrollPixelsPerUnit(& oldPPUX, & oldPPUY);
2064     GetViewStart(& oldStartX, & oldStartY);
2065     GetVirtualSize(& oldVirtualSizeX, & oldVirtualSizeY);
2066     if (oldPPUY > 0)
2067         oldVirtualSizeY /= oldPPUY;
2068
2069     if (oldPPUX == 0 && oldPPUY == pixelsPerUnit && oldVirtualSizeY == unitsY && oldStartX == newStartX && oldStartY == newStartY)
2070         return;
2071
2072     // Don't set scrollbars if there were none before, and there will be none now.
2073     if (oldPPUY != 0 && (oldVirtualSizeY*oldPPUY < clientSize.y) && (unitsY*pixelsPerUnit < clientSize.y))
2074         return;
2075
2076     // Move to previous scroll position if
2077     // possible
2078     SetScrollbars(0, pixelsPerUnit, 0, unitsY, newStartX, newStartY);
2079 }
2080
2081 /// Paint the background
2082 void wxRichTextCtrl::PaintBackground(wxDC& dc)
2083 {
2084     wxColour backgroundColour = GetBackgroundColour();
2085     if (!backgroundColour.Ok())
2086         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
2087
2088     // Clear the background
2089     dc.SetBrush(wxBrush(backgroundColour));
2090     dc.SetPen(*wxTRANSPARENT_PEN);
2091     wxRect windowRect(GetClientSize());
2092     windowRect.x -= 2; windowRect.y -= 2;
2093     windowRect.width += 4; windowRect.height += 4;
2094
2095     // We need to shift the rectangle to take into account
2096     // scrolling. Converting device to logical coordinates.
2097     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
2098     dc.DrawRectangle(windowRect);
2099 }
2100
2101 #if wxRICHTEXT_BUFFERED_PAINTING
2102 /// Recreate buffer bitmap if necessary
2103 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
2104 {
2105     wxSize sz = size;
2106     if (sz == wxDefaultSize)
2107         sz = GetClientSize();
2108
2109     if (sz.x < 1 || sz.y < 1)
2110         return false;
2111
2112     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
2113         m_bufferBitmap = wxBitmap(sz.x, sz.y);
2114     return m_bufferBitmap.Ok();
2115 }
2116 #endif
2117
2118 // ----------------------------------------------------------------------------
2119 // file IO functions
2120 // ----------------------------------------------------------------------------
2121
2122 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
2123 {
2124     bool success = GetBuffer().LoadFile(filename, (wxRichTextFileType)fileType);
2125     if (success)
2126         m_filename = filename;
2127
2128     DiscardEdits();
2129     SetInsertionPoint(0);
2130     LayoutContent();
2131     PositionCaret();
2132     SetupScrollbars(true);
2133     Refresh(false);
2134     wxTextCtrl::SendTextUpdatedEvent(this);
2135
2136     if (success)
2137         return true;
2138     else
2139     {
2140         wxLogError(_("File couldn't be loaded."));
2141
2142         return false;
2143     }
2144 }
2145
2146 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
2147 {
2148     if (GetBuffer().SaveFile(filename, (wxRichTextFileType)fileType))
2149     {
2150         m_filename = filename;
2151
2152         DiscardEdits();
2153
2154         return true;
2155     }
2156
2157     wxLogError(_("The text couldn't be saved."));
2158
2159     return false;
2160 }
2161
2162 // ----------------------------------------------------------------------------
2163 // wxRichTextCtrl specific functionality
2164 // ----------------------------------------------------------------------------
2165
2166 /// Add a new paragraph of text to the end of the buffer
2167 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
2168 {
2169     wxRichTextRange range = GetBuffer().AddParagraph(text);
2170     LayoutContent();
2171     return range;
2172 }
2173
2174 /// Add an image
2175 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
2176 {
2177     wxRichTextRange range = GetBuffer().AddImage(image);
2178     LayoutContent();
2179     return range;
2180 }
2181
2182 // ----------------------------------------------------------------------------
2183 // selection and ranges
2184 // ----------------------------------------------------------------------------
2185
2186 void wxRichTextCtrl::SelectAll()
2187 {
2188     SetSelection(-1, -1);
2189 }
2190
2191 /// Select none
2192 void wxRichTextCtrl::SelectNone()
2193 {
2194     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
2195     {
2196         wxRichTextRange oldSelection = m_selectionRange;
2197
2198         m_selectionRange = wxRichTextRange(-2, -2);
2199
2200         RefreshForSelectionChange(oldSelection, m_selectionRange);
2201     }
2202     m_selectionAnchor = -2;
2203 }
2204
2205 static bool wxIsWordDelimiter(const wxString& text)
2206 {
2207     return !text.IsEmpty() && !wxIsalnum(text[0]);
2208 }
2209
2210 /// Select the word at the given character position
2211 bool wxRichTextCtrl::SelectWord(long position)
2212 {
2213     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
2214         return false;
2215
2216     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
2217     if (!para)
2218         return false;
2219
2220     if (position == para->GetRange().GetEnd())
2221         position --;
2222
2223     long positionStart = position;
2224     long positionEnd = position;
2225
2226     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
2227     {
2228         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
2229         if (wxIsWordDelimiter(text))
2230         {
2231             positionStart ++;
2232             break;
2233         }
2234     }
2235     if (positionStart < para->GetRange().GetStart())
2236         positionStart = para->GetRange().GetStart();
2237
2238     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
2239     {
2240         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
2241         if (wxIsWordDelimiter(text))
2242         {
2243             positionEnd --;
2244             break;
2245         }
2246     }
2247     if (positionEnd >= para->GetRange().GetEnd())
2248         positionEnd = para->GetRange().GetEnd();
2249
2250     if (positionEnd < positionStart)
2251         return false;
2252
2253     SetSelection(positionStart, positionEnd+1);
2254
2255     if (positionStart >= 0)
2256     {
2257         MoveCaret(positionStart-1, true);
2258         SetDefaultStyleToCursorStyle();
2259     }
2260
2261     return true;
2262 }
2263
2264 wxString wxRichTextCtrl::GetStringSelection() const
2265 {
2266     long from, to;
2267     GetSelection(&from, &to);
2268
2269     return GetRange(from, to);
2270 }
2271
2272 // ----------------------------------------------------------------------------
2273 // hit testing
2274 // ----------------------------------------------------------------------------
2275
2276 wxTextCtrlHitTestResult
2277 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2278 {
2279     // implement in terms of the other overload as the native ports typically
2280     // can get the position and not (x, y) pair directly (although wxUniv
2281     // directly gets x and y -- and so overrides this method as well)
2282     long pos;
2283     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2284
2285     if ( rc != wxTE_HT_UNKNOWN )
2286     {
2287         PositionToXY(pos, x, y);
2288     }
2289
2290     return rc;
2291 }
2292
2293 wxTextCtrlHitTestResult
2294 wxRichTextCtrl::HitTest(const wxPoint& pt,
2295                         long * pos) const
2296 {
2297     wxClientDC dc((wxRichTextCtrl*) this);
2298     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2299
2300     // Buffer uses logical position (relative to start of buffer)
2301     // so convert
2302     wxPoint pt2 = GetLogicalPoint(pt);
2303
2304     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
2305
2306     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2307         return wxTE_HT_BEFORE;
2308     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2309         return wxTE_HT_BEYOND;
2310     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2311         return wxTE_HT_ON_TEXT;
2312
2313     return wxTE_HT_UNKNOWN;
2314 }
2315
2316 // ----------------------------------------------------------------------------
2317 // set/get the controls text
2318 // ----------------------------------------------------------------------------
2319
2320 wxString wxRichTextCtrl::DoGetValue() const
2321 {
2322     return GetBuffer().GetText();
2323 }
2324
2325 wxString wxRichTextCtrl::GetRange(long from, long to) const
2326 {
2327     // Public API for range is different from internals
2328     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2329 }
2330
2331 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2332 {
2333     // Don't call Clear here, since it always sends a text updated event
2334     m_buffer.ResetAndClearCommands();
2335     m_buffer.SetDirty(true);
2336     m_caretPosition = -1;
2337     m_caretPositionForDefaultStyle = -2;
2338     m_caretAtLineStart = false;
2339     m_selectionRange.SetRange(-2, -2);
2340
2341     Scroll(0,0);
2342
2343     if (!IsFrozen())
2344     {
2345         LayoutContent();
2346         Refresh(false);
2347     }
2348
2349     if (!value.IsEmpty())
2350     {
2351         // Remove empty paragraph
2352         GetBuffer().Clear();
2353         DoWriteText(value, flags);
2354
2355         // for compatibility, don't move the cursor when doing SetValue()
2356         SetInsertionPoint(0);
2357     }
2358     else
2359     {
2360         // still send an event for consistency
2361         if (flags & SetValue_SendEvent)
2362             wxTextCtrl::SendTextUpdatedEvent(this);
2363     }
2364     DiscardEdits();
2365 }
2366
2367 void wxRichTextCtrl::WriteText(const wxString& value)
2368 {
2369     DoWriteText(value);
2370 }
2371
2372 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2373 {
2374     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2375
2376     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2377
2378     if ( flags & SetValue_SendEvent )
2379         wxTextCtrl::SendTextUpdatedEvent(this);
2380 }
2381
2382 void wxRichTextCtrl::AppendText(const wxString& text)
2383 {
2384     SetInsertionPointEnd();
2385
2386     WriteText(text);
2387 }
2388
2389 /// Write an image at the current insertion point
2390 bool wxRichTextCtrl::WriteImage(const wxImage& image, wxBitmapType bitmapType)
2391 {
2392     wxRichTextImageBlock imageBlock;
2393
2394     wxImage image2 = image;
2395     if (imageBlock.MakeImageBlock(image2, bitmapType))
2396         return WriteImage(imageBlock);
2397
2398     return false;
2399 }
2400
2401 bool wxRichTextCtrl::WriteImage(const wxString& filename, wxBitmapType bitmapType)
2402 {
2403     wxRichTextImageBlock imageBlock;
2404
2405     wxImage image;
2406     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2407         return WriteImage(imageBlock);
2408
2409     return false;
2410 }
2411
2412 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2413 {
2414     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2415 }
2416
2417 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, wxBitmapType bitmapType)
2418 {
2419     if (bitmap.Ok())
2420     {
2421         wxRichTextImageBlock imageBlock;
2422
2423         wxImage image = bitmap.ConvertToImage();
2424         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2425             return WriteImage(imageBlock);
2426     }
2427
2428     return false;
2429 }
2430
2431 /// Insert a newline (actually paragraph) at the current insertion point.
2432 bool wxRichTextCtrl::Newline()
2433 {
2434     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2435 }
2436
2437 /// Insert a line break at the current insertion point.
2438 bool wxRichTextCtrl::LineBreak()
2439 {
2440     wxString text;
2441     text = wxRichTextLineBreakChar;
2442     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2443 }
2444
2445 // ----------------------------------------------------------------------------
2446 // Clipboard operations
2447 // ----------------------------------------------------------------------------
2448
2449 void wxRichTextCtrl::Copy()
2450 {
2451     if (CanCopy())
2452     {
2453         wxRichTextRange range = GetInternalSelectionRange();
2454         GetBuffer().CopyToClipboard(range);
2455     }
2456 }
2457
2458 void wxRichTextCtrl::Cut()
2459 {
2460     if (CanCut())
2461     {
2462         wxRichTextRange range = GetInternalSelectionRange();
2463         GetBuffer().CopyToClipboard(range);
2464
2465         DeleteSelectedContent();
2466         LayoutContent();
2467         Refresh(false);
2468     }
2469 }
2470
2471 void wxRichTextCtrl::Paste()
2472 {
2473     if (CanPaste())
2474     {
2475         BeginBatchUndo(_("Paste"));
2476
2477         long newPos = m_caretPosition;
2478         DeleteSelectedContent(& newPos);
2479
2480         GetBuffer().PasteFromClipboard(newPos);
2481
2482         EndBatchUndo();
2483     }
2484 }
2485
2486 void wxRichTextCtrl::DeleteSelection()
2487 {
2488     if (CanDeleteSelection())
2489     {
2490         DeleteSelectedContent();
2491     }
2492 }
2493
2494 bool wxRichTextCtrl::HasSelection() const
2495 {
2496     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2497 }
2498
2499 bool wxRichTextCtrl::CanCopy() const
2500 {
2501     // Can copy if there's a selection
2502     return HasSelection();
2503 }
2504
2505 bool wxRichTextCtrl::CanCut() const
2506 {
2507     return HasSelection() && IsEditable();
2508 }
2509
2510 bool wxRichTextCtrl::CanPaste() const
2511 {
2512     if ( !IsEditable() )
2513         return false;
2514
2515     return GetBuffer().CanPasteFromClipboard();
2516 }
2517
2518 bool wxRichTextCtrl::CanDeleteSelection() const
2519 {
2520     return HasSelection() && IsEditable();
2521 }
2522
2523
2524 // ----------------------------------------------------------------------------
2525 // Accessors
2526 // ----------------------------------------------------------------------------
2527
2528 void wxRichTextCtrl::SetContextMenu(wxMenu* menu)
2529 {
2530     if (m_contextMenu && m_contextMenu != menu)
2531         delete m_contextMenu;
2532     m_contextMenu = menu;
2533 }
2534
2535 void wxRichTextCtrl::SetEditable(bool editable)
2536 {
2537     m_editable = editable;
2538 }
2539
2540 void wxRichTextCtrl::SetInsertionPoint(long pos)
2541 {
2542     SelectNone();
2543
2544     m_caretPosition = pos - 1;
2545
2546     PositionCaret();
2547
2548     SetDefaultStyleToCursorStyle();
2549 }
2550
2551 void wxRichTextCtrl::SetInsertionPointEnd()
2552 {
2553     long pos = GetLastPosition();
2554     SetInsertionPoint(pos);
2555 }
2556
2557 long wxRichTextCtrl::GetInsertionPoint() const
2558 {
2559     return m_caretPosition+1;
2560 }
2561
2562 wxTextPos wxRichTextCtrl::GetLastPosition() const
2563 {
2564     return GetBuffer().GetRange().GetEnd();
2565 }
2566
2567 // If the return values from and to are the same, there is no
2568 // selection.
2569 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2570 {
2571     *from = m_selectionRange.GetStart();
2572     *to = m_selectionRange.GetEnd();
2573     if ((*to) != -1 && (*to) != -2)
2574         (*to) ++;
2575 }
2576
2577 bool wxRichTextCtrl::IsEditable() const
2578 {
2579     return m_editable;
2580 }
2581
2582 // ----------------------------------------------------------------------------
2583 // selection
2584 // ----------------------------------------------------------------------------
2585
2586 void wxRichTextCtrl::SetSelection(long from, long to)
2587 {
2588     // if from and to are both -1, it means (in wxWidgets) that all text should
2589     // be selected.
2590     if ( (from == -1) && (to == -1) )
2591     {
2592         from = 0;
2593         to = GetLastPosition()+1;
2594     }
2595
2596     if (from == to)
2597     {
2598         SelectNone();
2599     }
2600     else
2601     {
2602         wxRichTextRange oldSelection = m_selectionRange;
2603         m_selectionAnchor = from-1;
2604         m_selectionRange.SetRange(from, to-1);
2605
2606         m_caretPosition = wxMax(-1, to-1);
2607
2608         RefreshForSelectionChange(oldSelection, m_selectionRange);
2609         PositionCaret();
2610     }
2611 }
2612
2613 // ----------------------------------------------------------------------------
2614 // Editing
2615 // ----------------------------------------------------------------------------
2616
2617 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2618                              const wxString& value)
2619 {
2620     BeginBatchUndo(_("Replace"));
2621
2622     DeleteSelectedContent();
2623
2624     DoWriteText(value, SetValue_SelectionOnly);
2625
2626     EndBatchUndo();
2627 }
2628
2629 void wxRichTextCtrl::Remove(long from, long to)
2630 {
2631     SelectNone();
2632
2633     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to-1), this);
2634
2635     LayoutContent();
2636     if (!IsFrozen())
2637         Refresh(false);
2638 }
2639
2640 bool wxRichTextCtrl::IsModified() const
2641 {
2642     return m_buffer.IsModified();
2643 }
2644
2645 void wxRichTextCtrl::MarkDirty()
2646 {
2647     m_buffer.Modify(true);
2648 }
2649
2650 void wxRichTextCtrl::DiscardEdits()
2651 {
2652     m_caretPositionForDefaultStyle = -2;
2653     m_buffer.Modify(false);
2654     m_buffer.GetCommandProcessor()->ClearCommands();
2655 }
2656
2657 int wxRichTextCtrl::GetNumberOfLines() const
2658 {
2659     return GetBuffer().GetParagraphCount();
2660 }
2661
2662 // ----------------------------------------------------------------------------
2663 // Positions <-> coords
2664 // ----------------------------------------------------------------------------
2665
2666 long wxRichTextCtrl::XYToPosition(long x, long y) const
2667 {
2668     return GetBuffer().XYToPosition(x, y);
2669 }
2670
2671 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2672 {
2673     return GetBuffer().PositionToXY(pos, x, y);
2674 }
2675
2676 // ----------------------------------------------------------------------------
2677 //
2678 // ----------------------------------------------------------------------------
2679
2680 void wxRichTextCtrl::ShowPosition(long pos)
2681 {
2682     if (!IsPositionVisible(pos))
2683         ScrollIntoView(pos-1, WXK_DOWN);
2684 }
2685
2686 int wxRichTextCtrl::GetLineLength(long lineNo) const
2687 {
2688     return GetBuffer().GetParagraphLength(lineNo);
2689 }
2690
2691 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2692 {
2693     return GetBuffer().GetParagraphText(lineNo);
2694 }
2695
2696 // ----------------------------------------------------------------------------
2697 // Undo/redo
2698 // ----------------------------------------------------------------------------
2699
2700 void wxRichTextCtrl::Undo()
2701 {
2702     if (CanUndo())
2703     {
2704         GetCommandProcessor()->Undo();
2705     }
2706 }
2707
2708 void wxRichTextCtrl::Redo()
2709 {
2710     if (CanRedo())
2711     {
2712         GetCommandProcessor()->Redo();
2713     }
2714 }
2715
2716 bool wxRichTextCtrl::CanUndo() const
2717 {
2718     return GetCommandProcessor()->CanUndo();
2719 }
2720
2721 bool wxRichTextCtrl::CanRedo() const
2722 {
2723     return GetCommandProcessor()->CanRedo();
2724 }
2725
2726 // ----------------------------------------------------------------------------
2727 // implementation details
2728 // ----------------------------------------------------------------------------
2729
2730 void wxRichTextCtrl::Command(wxCommandEvent& event)
2731 {
2732     SetValue(event.GetString());
2733     GetEventHandler()->ProcessEvent(event);
2734 }
2735
2736 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2737 {
2738     // By default, load the first file into the text window.
2739     if (event.GetNumberOfFiles() > 0)
2740     {
2741         LoadFile(event.GetFiles()[0]);
2742     }
2743 }
2744
2745 wxSize wxRichTextCtrl::DoGetBestSize() const
2746 {
2747     return wxSize(10, 10);
2748 }
2749
2750 // ----------------------------------------------------------------------------
2751 // standard handlers for standard edit menu events
2752 // ----------------------------------------------------------------------------
2753
2754 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2755 {
2756     Cut();
2757 }
2758
2759 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2760 {
2761     DeleteSelection();
2762 }
2763
2764 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2765 {
2766     Copy();
2767 }
2768
2769 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2770 {
2771     Paste();
2772 }
2773
2774 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2775 {
2776     Undo();
2777 }
2778
2779 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2780 {
2781     Redo();
2782 }
2783
2784 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2785 {
2786     event.Enable( CanCut() );
2787 }
2788
2789 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2790 {
2791     event.Enable( CanCopy() );
2792 }
2793
2794 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2795 {
2796     event.Enable( CanDeleteSelection() );
2797 }
2798
2799 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2800 {
2801     event.Enable( CanPaste() );
2802 }
2803
2804 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2805 {
2806     event.Enable( CanUndo() );
2807     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2808 }
2809
2810 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2811 {
2812     event.Enable( CanRedo() );
2813     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2814 }
2815
2816 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2817 {
2818     if (GetLastPosition() > 0)
2819         SelectAll();
2820 }
2821
2822 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2823 {
2824     event.Enable(GetLastPosition() > 0);
2825 }
2826
2827 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2828 {
2829     if (event.GetEventObject() != this)
2830     {
2831         event.Skip();
2832         return;
2833     }
2834
2835     if (m_contextMenu)
2836         PopupMenu(m_contextMenu);
2837     return;
2838 }
2839
2840 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2841 {
2842     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttr(style));
2843 }
2844
2845 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxTextAttr& style)
2846 {
2847     return GetBuffer().SetStyle(range.ToInternal(), style);
2848 }
2849
2850 // extended style setting operation with flags including:
2851 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2852 // see richtextbuffer.h for more details.
2853
2854 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttr& style, int flags)
2855 {
2856     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2857 }
2858
2859 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2860 {
2861     return GetBuffer().SetDefaultStyle(wxTextAttr(style));
2862 }
2863
2864 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2865 {
2866     return GetBuffer().GetDefaultStyle();
2867 }
2868
2869 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2870 {
2871     return GetBuffer().GetStyle(position, style);
2872 }
2873
2874 // get the common set of styles for the range
2875 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttr& style)
2876 {
2877     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2878 }
2879
2880 /// Get the content (uncombined) attributes for this position.
2881 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2882 {
2883     return GetBuffer().GetUncombinedStyle(position, style);
2884 }
2885
2886 /// Set font, and also the buffer attributes
2887 bool wxRichTextCtrl::SetFont(const wxFont& font)
2888 {
2889     wxTextCtrlBase::SetFont(font);
2890
2891     wxTextAttr attr = GetBuffer().GetAttributes();
2892     attr.SetFont(font);
2893     GetBuffer().SetBasicStyle(attr);
2894
2895     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2896     Refresh(false);
2897
2898     return true;
2899 }
2900
2901 /// Transform logical to physical
2902 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2903 {
2904     wxPoint pt;
2905     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2906
2907     return pt;
2908 }
2909
2910 /// Transform physical to logical
2911 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2912 {
2913     wxPoint pt;
2914     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2915
2916     return pt;
2917 }
2918
2919 /// Position the caret
2920 void wxRichTextCtrl::PositionCaret()
2921 {
2922     if (!GetCaret())
2923         return;
2924
2925     //wxLogDebug(wxT("PositionCaret"));
2926
2927     wxRect caretRect;
2928     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2929     {
2930         wxPoint newPt = caretRect.GetPosition();
2931         wxSize newSz = caretRect.GetSize();
2932         wxPoint pt = GetPhysicalPoint(newPt);
2933         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
2934         {
2935             GetCaret()->Hide();
2936             if (GetCaret()->GetSize() != newSz)
2937                 GetCaret()->SetSize(newSz);
2938
2939             int halfSize = newSz.y/2;
2940             // If the caret is beyond the margin, hide it by moving it out of the way
2941             if (((pt.y + halfSize) < GetBuffer().GetTopMargin()) || ((pt.y + halfSize) > (GetClientSize().y - GetBuffer().GetBottomMargin())))
2942                 pt.y = -200;
2943
2944             GetCaret()->Move(pt);
2945             GetCaret()->Show();
2946         }
2947     }
2948 }
2949
2950 /// Get the caret height and position for the given character position
2951 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2952 {
2953     wxClientDC dc(this);
2954     dc.SetFont(GetFont());
2955
2956     PrepareDC(dc);
2957
2958     wxPoint pt;
2959     int height = 0;
2960
2961     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2962     {
2963         // Caret height can't be zero
2964         if (height == 0)
2965             height = dc.GetCharHeight();
2966
2967         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2968         return true;
2969     }
2970
2971     return false;
2972 }
2973
2974 /// Gets the line for the visible caret position. If the caret is
2975 /// shown at the very end of the line, it means the next character is actually
2976 /// on the following line. So let's get the line we're expecting to find
2977 /// if this is the case.
2978 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2979 {
2980     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2981     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2982     if (line)
2983     {
2984         wxRichTextRange lineRange = line->GetAbsoluteRange();
2985         if (caretPosition == lineRange.GetStart()-1 &&
2986             (para->GetRange().GetStart() != lineRange.GetStart()))
2987         {
2988             if (!m_caretAtLineStart)
2989                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2990         }
2991     }
2992     return line;
2993 }
2994
2995
2996 /// Move the caret to the given character position
2997 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2998 {
2999     if (GetBuffer().GetDirty())
3000         LayoutContent();
3001
3002     if (pos <= GetBuffer().GetRange().GetEnd())
3003     {
3004         SetCaretPosition(pos, showAtLineStart);
3005
3006         PositionCaret();
3007
3008         return true;
3009     }
3010     else
3011         return false;
3012 }
3013
3014 /// Layout the buffer: which we must do before certain operations, such as
3015 /// setting the caret position.
3016 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
3017 {
3018     if (GetBuffer().GetDirty() || onlyVisibleRect)
3019     {
3020         wxRect availableSpace(GetClientSize());
3021         if (availableSpace.width == 0)
3022             availableSpace.width = 10;
3023         if (availableSpace.height == 0)
3024             availableSpace.height = 10;
3025
3026         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
3027         if (onlyVisibleRect)
3028         {
3029             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
3030             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
3031         }
3032
3033         wxClientDC dc(this);
3034         dc.SetFont(GetFont());
3035
3036         PrepareDC(dc);
3037
3038         GetBuffer().Defragment();
3039         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
3040         GetBuffer().Layout(dc, availableSpace, flags);
3041         GetBuffer().SetDirty(false);
3042
3043         if (!IsFrozen())
3044             SetupScrollbars();
3045     }
3046
3047     return true;
3048 }
3049
3050 /// Is all of the selection bold?
3051 bool wxRichTextCtrl::IsSelectionBold()
3052 {
3053     if (HasSelection())
3054     {
3055         wxTextAttr attr;
3056         wxRichTextRange range = GetSelectionRange();
3057         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3058         attr.SetFontWeight(wxFONTWEIGHT_BOLD);
3059
3060         return HasCharacterAttributes(range, attr);
3061     }
3062     else
3063     {
3064         // If no selection, then we need to combine current style with default style
3065         // to see what the effect would be if we started typing.
3066         wxTextAttr attr;
3067         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3068
3069         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3070         if (GetStyle(pos, attr))
3071         {
3072             if (IsDefaultStyleShowing())
3073                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3074             return attr.GetFontWeight() == wxFONTWEIGHT_BOLD;
3075         }
3076     }
3077     return false;
3078 }
3079
3080 /// Is all of the selection italics?
3081 bool wxRichTextCtrl::IsSelectionItalics()
3082 {
3083     if (HasSelection())
3084     {
3085         wxRichTextRange range = GetSelectionRange();
3086         wxTextAttr attr;
3087         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3088         attr.SetFontStyle(wxFONTSTYLE_ITALIC);
3089
3090         return HasCharacterAttributes(range, attr);
3091     }
3092     else
3093     {
3094         // If no selection, then we need to combine current style with default style
3095         // to see what the effect would be if we started typing.
3096         wxTextAttr attr;
3097         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3098
3099         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3100         if (GetStyle(pos, attr))
3101         {
3102             if (IsDefaultStyleShowing())
3103                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3104             return attr.GetFontStyle() == wxFONTSTYLE_ITALIC;
3105         }
3106     }
3107     return false;
3108 }
3109
3110 /// Is all of the selection underlined?
3111 bool wxRichTextCtrl::IsSelectionUnderlined()
3112 {
3113     if (HasSelection())
3114     {
3115         wxRichTextRange range = GetSelectionRange();
3116         wxTextAttr attr;
3117         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3118         attr.SetFontUnderlined(true);
3119
3120         return HasCharacterAttributes(range, attr);
3121     }
3122     else
3123     {
3124         // If no selection, then we need to combine current style with default style
3125         // to see what the effect would be if we started typing.
3126         wxTextAttr attr;
3127         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3128         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3129
3130         if (GetStyle(pos, attr))
3131         {
3132             if (IsDefaultStyleShowing())
3133                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3134             return attr.GetFontUnderlined();
3135         }
3136     }
3137     return false;
3138 }
3139
3140 /// Apply bold to the selection
3141 bool wxRichTextCtrl::ApplyBoldToSelection()
3142 {
3143     wxTextAttr attr;
3144     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3145     attr.SetFontWeight(IsSelectionBold() ? wxFONTWEIGHT_NORMAL : wxFONTWEIGHT_BOLD);
3146
3147     if (HasSelection())
3148         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3149     else
3150     {
3151         wxRichTextAttr current = GetDefaultStyleEx();
3152         current.Apply(attr);
3153         SetAndShowDefaultStyle(current);
3154     }
3155     return true;
3156 }
3157
3158 /// Apply italic to the selection
3159 bool wxRichTextCtrl::ApplyItalicToSelection()
3160 {
3161     wxTextAttr attr;
3162     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3163     attr.SetFontStyle(IsSelectionItalics() ? wxFONTSTYLE_NORMAL : wxFONTSTYLE_ITALIC);
3164
3165     if (HasSelection())
3166         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3167     else
3168     {
3169         wxRichTextAttr current = GetDefaultStyleEx();
3170         current.Apply(attr);
3171         SetAndShowDefaultStyle(current);
3172     }
3173     return true;
3174 }
3175
3176 /// Apply underline to the selection
3177 bool wxRichTextCtrl::ApplyUnderlineToSelection()
3178 {
3179     wxTextAttr attr;
3180     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3181     attr.SetFontUnderlined(!IsSelectionUnderlined());
3182
3183     if (HasSelection())
3184         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3185     else
3186     {
3187         wxRichTextAttr current = GetDefaultStyleEx();
3188         current.Apply(attr);
3189         SetAndShowDefaultStyle(current);
3190     }
3191     return true;
3192 }
3193
3194 /// Is all of the selection aligned according to the specified flag?
3195 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
3196 {
3197     wxRichTextRange range;
3198     if (HasSelection())
3199         range = GetSelectionRange();
3200     else
3201         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
3202
3203     wxTextAttr attr;
3204     attr.SetAlignment(alignment);
3205
3206     return HasParagraphAttributes(range, attr);
3207 }
3208
3209 /// Apply alignment to the selection
3210 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
3211 {
3212     wxTextAttr attr;
3213     attr.SetAlignment(alignment);
3214     if (HasSelection())
3215         return SetStyle(GetSelectionRange(), attr);
3216     else
3217     {
3218         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
3219         if (para)
3220             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
3221     }
3222     return true;
3223 }
3224
3225 /// Apply a named style to the selection
3226 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
3227 {
3228     // Flags are defined within each definition, so only certain
3229     // attributes are applied.
3230     wxTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
3231
3232     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_RESET;
3233
3234     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
3235     {
3236         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3237
3238         wxRichTextRange range;
3239
3240         if (HasSelection())
3241             range = GetSelectionRange();
3242         else
3243         {
3244             long pos = GetAdjustedCaretPosition(GetCaretPosition());
3245             range = wxRichTextRange(pos, pos+1);
3246         }
3247
3248         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
3249     }
3250
3251     // Make sure the attr has the style name
3252     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
3253     {
3254         attr.SetParagraphStyleName(def->GetName());
3255
3256         // If applying a paragraph style, we only want the paragraph nodes to adopt these
3257         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
3258         // to change its style independently.
3259         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3260     }
3261     else
3262         attr.SetCharacterStyleName(def->GetName());
3263
3264     if (HasSelection())
3265         return SetStyleEx(GetSelectionRange(), attr, flags);
3266     else
3267     {
3268         wxRichTextAttr current = GetDefaultStyleEx();
3269         current.Apply(attr);
3270         SetAndShowDefaultStyle(current);
3271         return true;
3272     }
3273 }
3274
3275 /// Apply the style sheet to the buffer, for example if the styles have changed.
3276 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
3277 {
3278     if (!styleSheet)
3279         styleSheet = GetBuffer().GetStyleSheet();
3280     if (!styleSheet)
3281         return false;
3282
3283     if (GetBuffer().ApplyStyleSheet(styleSheet))
3284     {
3285         GetBuffer().Invalidate(wxRICHTEXT_ALL);
3286         Refresh(false);
3287         return true;
3288     }
3289     else
3290         return false;
3291 }
3292
3293 /// Sets the default style to the style under the cursor
3294 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3295 {
3296     wxTextAttr attr;
3297     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3298
3299     // If at the start of a paragraph, use the next position.
3300     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3301
3302     if (GetUncombinedStyle(pos, attr))
3303     {
3304         SetDefaultStyle(attr);
3305         return true;
3306     }
3307
3308     return false;
3309 }
3310
3311 /// Returns the first visible position in the current view
3312 long wxRichTextCtrl::GetFirstVisiblePosition() const
3313 {
3314     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3315     if (line)
3316         return line->GetAbsoluteRange().GetStart();
3317     else
3318         return 0;
3319 }
3320
3321 /// Get the first visible point in the window
3322 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3323 {
3324     int ppuX, ppuY;
3325     int startXUnits, startYUnits;
3326
3327     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3328     GetViewStart(& startXUnits, & startYUnits);
3329
3330     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3331 }
3332
3333 /// The adjusted caret position is the character position adjusted to take
3334 /// into account whether we're at the start of a paragraph, in which case
3335 /// style information should be taken from the next position, not current one.
3336 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3337 {
3338     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3339
3340     if (para && (caretPos+1 == para->GetRange().GetStart()))
3341         caretPos ++;
3342     return caretPos;
3343 }
3344
3345 /// Get/set the selection range in character positions. -1, -1 means no selection.
3346 /// The range is in API convention, i.e. a single character selection is denoted
3347 /// by (n, n+1)
3348 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3349 {
3350     wxRichTextRange range = GetInternalSelectionRange();
3351     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3352         range.SetEnd(range.GetEnd() + 1);
3353     return range;
3354 }
3355
3356 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3357 {
3358     SetSelection(range.GetStart(), range.GetEnd());
3359 }
3360
3361 /// Set list style
3362 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3363 {
3364     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3365 }
3366
3367 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3368 {
3369     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3370 }
3371
3372 /// Clear list for given range
3373 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3374 {
3375     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3376 }
3377
3378 /// Number/renumber any list elements in the given range
3379 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3380 {
3381     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3382 }
3383
3384 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3385 {
3386     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3387 }
3388
3389 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3390 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3391 {
3392     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3393 }
3394
3395 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3396 {
3397     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3398 }
3399
3400 /// Deletes the content in the given range
3401 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3402 {
3403     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3404 }
3405
3406 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3407 {
3408     if (sm_availableFontNames.GetCount() == 0)
3409     {
3410         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3411         sm_availableFontNames.Sort();
3412     }
3413     return sm_availableFontNames;
3414 }
3415
3416 void wxRichTextCtrl::ClearAvailableFontNames()
3417 {
3418     sm_availableFontNames.Clear();
3419 }
3420
3421 void wxRichTextCtrl::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
3422 {
3423     //wxLogDebug(wxT("wxRichTextCtrl::OnSysColourChanged"));
3424
3425     wxTextAttrEx basicStyle = GetBasicStyle();
3426     basicStyle.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
3427     SetBasicStyle(basicStyle);
3428     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
3429
3430     Refresh();
3431 }
3432
3433 // Refresh the area affected by a selection change
3434 bool wxRichTextCtrl::RefreshForSelectionChange(const wxRichTextRange& oldSelection, const wxRichTextRange& newSelection)
3435 {
3436     // Calculate the refresh rectangle - just the affected lines
3437     long firstPos, lastPos;
3438     if (oldSelection.GetStart() == -2 && newSelection.GetStart() != -2)
3439     {
3440         firstPos = newSelection.GetStart();
3441         lastPos = newSelection.GetEnd();
3442     }
3443     else if (oldSelection.GetStart() != -2 && newSelection.GetStart() == -2)
3444     {
3445         firstPos = oldSelection.GetStart();
3446         lastPos = oldSelection.GetEnd();
3447     }
3448     else if (oldSelection.GetStart() == -2 && newSelection.GetStart() == -2)
3449     {
3450         return false;
3451     }
3452     else
3453     {
3454         firstPos = wxMin(oldSelection.GetStart(), newSelection.GetStart());
3455         lastPos = wxMax(oldSelection.GetEnd(), newSelection.GetEnd());
3456     }
3457
3458     wxRichTextLine* firstLine = GetBuffer().GetLineAtPosition(firstPos);
3459     wxRichTextLine* lastLine = GetBuffer().GetLineAtPosition(lastPos);
3460
3461     if (firstLine && lastLine)
3462     {
3463         wxSize clientSize = GetClientSize();
3464         wxPoint pt1 = GetPhysicalPoint(firstLine->GetAbsolutePosition());
3465         wxPoint pt2 = GetPhysicalPoint(lastLine->GetAbsolutePosition()) + wxPoint(0, lastLine->GetSize().y);
3466
3467         pt1.x = 0;
3468         pt1.y = wxMax(0, pt1.y);
3469         pt2.x = 0;
3470         pt2.y = wxMin(clientSize.y, pt2.y);
3471
3472         wxRect rect(pt1, wxSize(clientSize.x, pt2.y - pt1.y));
3473         RefreshRect(rect, false);
3474     }
3475     else
3476         Refresh(false);
3477
3478     return true;
3479 }
3480
3481 #if wxRICHTEXT_USE_OWN_CARET
3482
3483 // ----------------------------------------------------------------------------
3484 // initialization and destruction
3485 // ----------------------------------------------------------------------------
3486
3487 void wxRichTextCaret::Init()
3488 {
3489     m_hasFocus = true;
3490
3491     m_xOld =
3492     m_yOld = -1;
3493     m_richTextCtrl = NULL;
3494     m_needsUpdate = false;
3495     m_flashOn = true;
3496 }
3497
3498 wxRichTextCaret::~wxRichTextCaret()
3499 {
3500     if (m_timer.IsRunning())
3501         m_timer.Stop();
3502 }
3503
3504 // ----------------------------------------------------------------------------
3505 // showing/hiding/moving the caret (base class interface)
3506 // ----------------------------------------------------------------------------
3507
3508 void wxRichTextCaret::DoShow()
3509 {
3510     m_flashOn = true;
3511
3512     if (!m_timer.IsRunning())
3513         m_timer.Start(GetBlinkTime());
3514
3515     Refresh();
3516 }
3517
3518 void wxRichTextCaret::DoHide()
3519 {
3520     if (m_timer.IsRunning())
3521         m_timer.Stop();
3522
3523     Refresh();
3524 }
3525
3526 void wxRichTextCaret::DoMove()
3527 {
3528     if (IsVisible())
3529     {
3530         Refresh();
3531
3532         if (m_xOld != -1 && m_yOld != -1)
3533         {
3534             if (m_richTextCtrl)
3535             {
3536                 wxRect rect(GetPosition(), GetSize());
3537                 m_richTextCtrl->RefreshRect(rect, false);
3538             }
3539         }
3540     }
3541
3542     m_xOld = m_x;
3543     m_yOld = m_y;
3544 }
3545
3546 void wxRichTextCaret::DoSize()
3547 {
3548     int countVisible = m_countVisible;
3549     if (countVisible > 0)
3550     {
3551         m_countVisible = 0;
3552         DoHide();
3553     }
3554
3555     if (countVisible > 0)
3556     {
3557         m_countVisible = countVisible;
3558         DoShow();
3559     }
3560 }
3561
3562 // ----------------------------------------------------------------------------
3563 // handling the focus
3564 // ----------------------------------------------------------------------------
3565
3566 void wxRichTextCaret::OnSetFocus()
3567 {
3568     m_hasFocus = true;
3569
3570     if ( IsVisible() )
3571         Refresh();
3572 }
3573
3574 void wxRichTextCaret::OnKillFocus()
3575 {
3576     m_hasFocus = false;
3577 }
3578
3579 // ----------------------------------------------------------------------------
3580 // drawing the caret
3581 // ----------------------------------------------------------------------------
3582
3583 void wxRichTextCaret::Refresh()
3584 {
3585     if (m_richTextCtrl)
3586     {
3587         wxRect rect(GetPosition(), GetSize());
3588         m_richTextCtrl->RefreshRect(rect, false);
3589     }
3590 }
3591
3592 void wxRichTextCaret::DoDraw(wxDC *dc)
3593 {
3594     dc->SetPen( *wxBLACK_PEN );
3595
3596     dc->SetBrush(*(m_hasFocus ? wxBLACK_BRUSH : wxTRANSPARENT_BRUSH));
3597     dc->SetPen(*wxBLACK_PEN);
3598
3599     wxPoint pt(m_x, m_y);
3600
3601     if (m_richTextCtrl)
3602     {
3603         pt = m_richTextCtrl->GetLogicalPoint(pt);
3604     }
3605     if (IsVisible() && m_flashOn)
3606         dc->DrawRectangle(pt.x, pt.y, m_width, m_height);
3607 }
3608
3609 void wxRichTextCaret::Notify()
3610 {
3611     m_flashOn = !m_flashOn;
3612     Refresh();
3613 }
3614
3615 void wxRichTextCaretTimer::Notify()
3616 {
3617     m_caret->Notify();
3618 }
3619 #endif
3620     // wxRICHTEXT_USE_OWN_CARET
3621
3622 #endif
3623     // wxUSE_RICHTEXT