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 #if wxRICHTEXT_USE_OWN_CARET
 413         if (GetCaret()->IsVisible())
 414         {
 415             ((wxRichTextCaret*) GetCaret())->DoDraw(& dc);
 416         }
 417 #endif
 418     }
 419
 420 #if !wxRICHTEXT_USE_OWN_CARET
 421     if (GetCaret())
 422         GetCaret()->Show();
 423     PositionCaret();
 424 #endif
 425 }
 426
 427 // Empty implementation, to prevent flicker
 428 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 429 {
 430 }
 431
 432 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 433 {
 434     if (GetCaret())
 435     {
 436 #if !wxRICHTEXT_USE_OWN_CARET
 437         PositionCaret();
 438 #endif
 439         GetCaret()->Show();
 440     }
 441
 442 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 443     // Work around dropouts when control is focused
 444     if (!IsFrozen())
 445     {
 446         Refresh(false);
 447     }
 448 #endif
 449 }
 450
 451 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 452 {
 453     if (GetCaret())
 454         GetCaret()->Hide();
 455
 456 #if defined(__WXGTK__) && !wxRICHTEXT_USE_OWN_CARET
 457     // Work around dropouts when control is focused
 458     if (!IsFrozen())
 459     {
 460         Refresh(false);
 461     }
 462 #endif
 463 }
 464
 465 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 466 {
 467     m_dragging = false;
 468 }
 469
 470 /// Left-click
 471 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 472 {
 473     SetFocus();
 474
 475     wxClientDC dc(this);
 476     PrepareDC(dc);
 477     dc.SetFont(GetFont());
 478
 479     long position = 0;
 480     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 481
 482     if (hit != wxRICHTEXT_HITTEST_NONE)
 483     {
 484         m_dragStart = event.GetLogicalPosition(dc);
 485         m_dragging = true;
 486         CaptureMouse();
 487
 488         bool caretAtLineStart = false;
 489
 490         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 491         {
 492             // If we're at the start of a line (but not first in para)
 493             // then we should keep the caret showing at the start of the line
 494             // by showing the m_caretAtLineStart flag.
 495             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 496             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 497
 498             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 499                 caretAtLineStart = true;
 500             position --;
 501         }
 502
 503         long oldCaretPos = m_caretPosition;
 504
 505         MoveCaret(position, caretAtLineStart);
 506         SetDefaultStyleToCursorStyle();
 507
 508         if (event.ShiftDown())
 509         {
 510             if (m_selectionRange.GetStart() == -2)
 511                 ExtendSelection(oldCaretPos, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 512             else
 513                 ExtendSelection(m_caretPosition, m_caretPosition, wxRICHTEXT_SHIFT_DOWN);
 514         }
 515         else
 516             SelectNone();
 517     }
 518
 519     event.Skip();
 520 }
 521
 522 /// Left-up
 523 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 524 {
 525     if (m_dragging)
 526     {
 527         m_dragging = false;
 528         if (GetCapture() == this)
 529             ReleaseMouse();
 530
 531         // See if we clicked on a URL
 532         wxClientDC dc(this);
 533         PrepareDC(dc);
 534         dc.SetFont(GetFont());
 535
 536         long position = 0;
 537         wxPoint logicalPt = event.GetLogicalPosition(dc);
 538         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 539
 540         if ((hit != wxRICHTEXT_HITTEST_NONE) && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 541         {
 542             wxRichTextEvent cmdEvent(
 543                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 544                 GetId());
 545             cmdEvent.SetEventObject(this);
 546             cmdEvent.SetPosition(m_caretPosition+1);
 547
 548             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 549             {
 550                 wxTextAttr attr;
 551                 if (GetStyle(position, attr))
 552                 {
 553                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 554                     {
 555                         wxString urlTarget = attr.GetURL();
 556                         if (!urlTarget.IsEmpty())
 557                         {
 558                             wxMouseEvent mouseEvent(event);
 559
 560                             long startPos = 0, endPos = 0;
 561                             wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 562                             if (obj)
 563                             {
 564                                 startPos = obj->GetRange().GetStart();
 565                                 endPos = obj->GetRange().GetEnd();
 566                             }
 567
 568                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 569                             InitCommandEvent(urlEvent);
 570
 571                             urlEvent.SetString(urlTarget);
 572
 573                             GetEventHandler()->ProcessEvent(urlEvent);
 574                         }
 575                     }
 576                 }
 577             }
 578         }
 579     }
 580 }
 581
 582 /// Left-click
 583 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 584 {
 585     wxClientDC dc(this);
 586     PrepareDC(dc);
 587     dc.SetFont(GetFont());
 588
 589     long position = 0;
 590     wxPoint logicalPt = event.GetLogicalPosition(dc);
 591     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 592
 593     // See if we need to change the cursor
 594
 595     {
 596         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 597         {
 598             wxTextAttr attr;
 599             if (GetStyle(position, attr))
 600             {
 601                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 602                 {
 603                     SetCursor(m_urlCursor);
 604                 }
 605                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 606                 {
 607                     SetCursor(m_textCursor);
 608                 }
 609             }
 610         }
 611         else
 612             SetCursor(m_textCursor);
 613     }
 614
 615     if (!event.Dragging())
 616     {
 617         event.Skip();
 618         return;
 619     }
 620
 621     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 622     {
 623         // TODO: test closeness
 624
 625         bool caretAtLineStart = false;
 626
 627         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 628         {
 629             // If we're at the start of a line (but not first in para)
 630             // then we should keep the caret showing at the start of the line
 631             // by showing the m_caretAtLineStart flag.
 632             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 633             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 634
 635             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 636                 caretAtLineStart = true;
 637             position --;
 638         }
 639
 640         if (m_caretPosition != position)
 641         {
 642             ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 643
 644             MoveCaret(position, caretAtLineStart);
 645             SetDefaultStyleToCursorStyle();
 646         }
 647     }
 648 }
 649
 650 /// Right-click
 651 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 652 {
 653     SetFocus();
 654
 655     wxRichTextEvent cmdEvent(
 656         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 657         GetId());
 658     cmdEvent.SetEventObject(this);
 659     cmdEvent.SetPosition(m_caretPosition+1);
 660
 661     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 662         event.Skip();
 663 }
 664
 665 /// Left-double-click
 666 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 667 {
 668     wxRichTextEvent cmdEvent(
 669         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
 670         GetId());
 671     cmdEvent.SetEventObject(this);
 672     cmdEvent.SetPosition(m_caretPosition+1);
 673
 674     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 675     {
 676         SelectWord(GetCaretPosition()+1);
 677     }
 678 }
 679
 680 /// Middle-click
 681 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 682 {
 683     wxRichTextEvent cmdEvent(
 684         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
 685         GetId());
 686     cmdEvent.SetEventObject(this);
 687     cmdEvent.SetPosition(m_caretPosition+1);
 688
 689     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 690         event.Skip();
 691 }
 692
 693 /// Key press
 694 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 695 {
 696     int flags = 0;
 697     if (event.CmdDown())
 698         flags |= wxRICHTEXT_CTRL_DOWN;
 699     if (event.ShiftDown())
 700         flags |= wxRICHTEXT_SHIFT_DOWN;
 701     if (event.AltDown())
 702         flags |= wxRICHTEXT_ALT_DOWN;
 703
 704     if (event.GetEventType() == wxEVT_KEY_DOWN)
 705     {
 706         if (event.IsKeyInCategory(WXK_CATEGORY_NAVIGATION))
 707         {
 708             KeyboardNavigate(event.GetKeyCode(), flags);
 709             return;
 710         }
 711
 712         long keycode = event.GetKeyCode();
 713         switch ( keycode )
 714         {
 715             case WXK_ESCAPE:
 716             case WXK_START:
 717             case WXK_LBUTTON:
 718             case WXK_RBUTTON:
 719             case WXK_CANCEL:
 720             case WXK_MBUTTON:
 721             case WXK_CLEAR:
 722             case WXK_SHIFT:
 723             case WXK_ALT:
 724             case WXK_CONTROL:
 725             case WXK_MENU:
 726             case WXK_PAUSE:
 727             case WXK_CAPITAL:
 728             case WXK_END:
 729             case WXK_HOME:
 730             case WXK_LEFT:
 731             case WXK_UP:
 732             case WXK_RIGHT:
 733             case WXK_DOWN:
 734             case WXK_SELECT:
 735             case WXK_PRINT:
 736             case WXK_EXECUTE:
 737             case WXK_SNAPSHOT:
 738             case WXK_INSERT:
 739             case WXK_HELP:
 740             case WXK_F1:
 741             case WXK_F2:
 742             case WXK_F3:
 743             case WXK_F4:
 744             case WXK_F5:
 745             case WXK_F6:
 746             case WXK_F7:
 747             case WXK_F8:
 748             case WXK_F9:
 749             case WXK_F10:
 750             case WXK_F11:
 751             case WXK_F12:
 752             case WXK_F13:
 753             case WXK_F14:
 754             case WXK_F15:
 755             case WXK_F16:
 756             case WXK_F17:
 757             case WXK_F18:
 758             case WXK_F19:
 759             case WXK_F20:
 760             case WXK_F21:
 761             case WXK_F22:
 762             case WXK_F23:
 763             case WXK_F24:
 764             case WXK_NUMLOCK:
 765             case WXK_SCROLL:
 766             case WXK_PAGEUP:
 767             case WXK_PAGEDOWN:
 768             case WXK_NUMPAD_F1:
 769             case WXK_NUMPAD_F2:
 770             case WXK_NUMPAD_F3:
 771             case WXK_NUMPAD_F4:
 772             case WXK_NUMPAD_HOME:
 773             case WXK_NUMPAD_LEFT:
 774             case WXK_NUMPAD_UP:
 775             case WXK_NUMPAD_RIGHT:
 776             case WXK_NUMPAD_DOWN:
 777             case WXK_NUMPAD_PAGEUP:
 778             case WXK_NUMPAD_PAGEDOWN:
 779             case WXK_NUMPAD_END:
 780             case WXK_NUMPAD_BEGIN:
 781             case WXK_NUMPAD_INSERT:
 782             case WXK_WINDOWS_LEFT:
 783             {
 784                 return;
 785             }
 786             default:
 787             {
 788             }
 789         }
 790
 791         // Must process this before translation, otherwise it's translated into a WXK_DELETE event.
 792         if (event.CmdDown() && event.GetKeyCode() == WXK_BACK)
 793         {
 794             BeginBatchUndo(_("Delete Text"));
 795
 796             long newPos = m_caretPosition;
 797
 798             bool processed = DeleteSelectedContent(& newPos);
 799
 800             // Submit range in character positions, which are greater than caret positions,
 801             // so subtract 1 for deleted character and add 1 for conversion to character position.
 802             if (newPos > -1)
 803             {
 804                 if (event.CmdDown())
 805                 {
 806                     long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 807                     if (pos < newPos)
 808                     {
 809                         GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this);
 810                         processed = true;
 811                     }
 812                 }
 813
 814                 if (!processed)
 815                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this);
 816             }
 817
 818             EndBatchUndo();
 819
 820             if (GetLastPosition() == -1)
 821             {
 822                 GetBuffer().Reset();
 823
 824                 m_caretPosition = -1;
 825                 PositionCaret();
 826                 SetDefaultStyleToCursorStyle();
 827             }
 828
 829             ScrollIntoView(m_caretPosition, WXK_LEFT);
 830
 831             wxRichTextEvent cmdEvent(
 832                 wxEVT_COMMAND_RICHTEXT_DELETE,
 833                 GetId());
 834             cmdEvent.SetEventObject(this);
 835             cmdEvent.SetFlags(flags);
 836             cmdEvent.SetPosition(m_caretPosition+1);
 837             GetEventHandler()->ProcessEvent(cmdEvent);
 838
 839             Update();
 840         }
 841         else
 842             event.Skip();
 843
 844         return;
 845     }
 846
 847     // all the other keys modify the controls contents which shouldn't be
 848     // possible if we're read-only
 849     if ( !IsEditable() )
 850     {
 851         event.Skip();
 852         return;
 853     }
 854
 855     if (event.GetKeyCode() == WXK_RETURN)
 856     {
 857         BeginBatchUndo(_("Insert Text"));
 858
 859         long newPos = m_caretPosition;
 860
 861         DeleteSelectedContent(& newPos);
 862
 863         if (event.ShiftDown())
 864         {
 865             wxString text;
 866             text = wxRichTextLineBreakChar;
 867             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 868             m_caretAtLineStart = true;
 869             PositionCaret();
 870         }
 871         else
 872             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE|wxRICHTEXT_INSERT_INTERACTIVE);
 873
 874         EndBatchUndo();
 875         SetDefaultStyleToCursorStyle();
 876
 877         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 878
 879         wxRichTextEvent cmdEvent(
 880             wxEVT_COMMAND_RICHTEXT_RETURN,
 881             GetId());
 882         cmdEvent.SetEventObject(this);
 883         cmdEvent.SetFlags(flags);
 884         cmdEvent.SetPosition(newPos+1);
 885
 886         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 887         {
 888             // Generate conventional event
 889             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 890             InitCommandEvent(textEvent);
 891
 892             GetEventHandler()->ProcessEvent(textEvent);
 893         }
 894         Update();
 895     }
 896     else if (event.GetKeyCode() == WXK_BACK)
 897     {
 898         BeginBatchUndo(_("Delete Text"));
 899
 900         long newPos = m_caretPosition;
 901
 902         bool processed = DeleteSelectedContent(& newPos);
 903
 904         // Submit range in character positions, which are greater than caret positions,
 905         // so subtract 1 for deleted character and add 1 for conversion to character position.
 906         if (newPos > -1)
 907         {
 908             if (event.CmdDown())
 909             {
 910                 long pos = wxRichTextCtrl::FindNextWordPosition(-1);
 911                 if (pos < newPos)
 912                 {
 913                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(pos+1, newPos), this);
 914                     processed = true;
 915                 }
 916             }
 917
 918             if (!processed)
 919                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos, newPos), this);
 920         }
 921
 922         EndBatchUndo();
 923
 924         if (GetLastPosition() == -1)
 925         {
 926             GetBuffer().Reset();
 927
 928             m_caretPosition = -1;
 929             PositionCaret();
 930             SetDefaultStyleToCursorStyle();
 931         }
 932
 933         ScrollIntoView(m_caretPosition, WXK_LEFT);
 934
 935         wxRichTextEvent cmdEvent(
 936             wxEVT_COMMAND_RICHTEXT_DELETE,
 937             GetId());
 938         cmdEvent.SetEventObject(this);
 939         cmdEvent.SetFlags(flags);
 940         cmdEvent.SetPosition(m_caretPosition+1);
 941         GetEventHandler()->ProcessEvent(cmdEvent);
 942
 943         Update();
 944     }
 945     else if (event.GetKeyCode() == WXK_DELETE)
 946     {
 947         BeginBatchUndo(_("Delete Text"));
 948
 949         long newPos = m_caretPosition;
 950
 951         bool processed = DeleteSelectedContent(& newPos);
 952
 953         // Submit range in character positions, which are greater than caret positions,
 954         if (newPos < GetBuffer().GetRange().GetEnd()+1)
 955         {
 956             if (event.CmdDown())
 957             {
 958                 long pos = wxRichTextCtrl::FindNextWordPosition(1);
 959                 if (pos != -1 && (pos > newPos))
 960                 {
 961                     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos+1, pos), this);
 962                     processed = true;
 963                 }
 964             }
 965
 966             if (!processed)
 967                 GetBuffer().DeleteRangeWithUndo(wxRichTextRange(newPos+1, newPos+1), this);
 968         }
 969
 970         EndBatchUndo();
 971
 972         if (GetLastPosition() == -1)
 973         {
 974             GetBuffer().Reset();
 975
 976             m_caretPosition = -1;
 977             PositionCaret();
 978             SetDefaultStyleToCursorStyle();
 979         }
 980
 981         wxRichTextEvent cmdEvent(
 982             wxEVT_COMMAND_RICHTEXT_DELETE,
 983             GetId());
 984         cmdEvent.SetEventObject(this);
 985         cmdEvent.SetFlags(flags);
 986         cmdEvent.SetPosition(m_caretPosition+1);
 987         GetEventHandler()->ProcessEvent(cmdEvent);
 988
 989         Update();
 990     }
 991     else
 992     {
 993         long keycode = event.GetKeyCode();
 994         switch ( keycode )
 995         {
 996             case WXK_ESCAPE:
 997             {
 998                 event.Skip();
 999                 return;
1000             }
1001
1002             default:
1003             {
1004 #ifdef __WXMAC__
1005                 if (event.CmdDown())
1006 #else
1007                 // Fixes AltGr+key with European input languages on Windows
1008                 if ((event.CmdDown() && !event.AltDown()) || (event.AltDown() && !event.CmdDown()))
1009 #endif
1010                 {
1011                     event.Skip();
1012                     return;
1013                 }
1014
1015                 wxRichTextEvent cmdEvent(
1016                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
1017                     GetId());
1018                 cmdEvent.SetEventObject(this);
1019                 cmdEvent.SetFlags(flags);
1020 #if wxUSE_UNICODE
1021                 cmdEvent.SetCharacter(event.GetUnicodeKey());
1022 #else
1023                 cmdEvent.SetCharacter((wxChar) keycode);
1024 #endif
1025                 cmdEvent.SetPosition(m_caretPosition+1);
1026
1027                 if (keycode == wxT('\t'))
1028                 {
1029                     // See if we need to promote or demote the selection or paragraph at the cursor
1030                     // position, instead of inserting a tab.
1031                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
1032                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
1033                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
1034                     {
1035                         wxRichTextRange range;
1036                         if (HasSelection())
1037                             range = GetSelectionRange();
1038                         else
1039                             range = para->GetRange().FromInternal();
1040
1041                         int promoteBy = event.ShiftDown() ? 1 : -1;
1042
1043                         PromoteList(promoteBy, range, NULL);
1044
1045                         GetEventHandler()->ProcessEvent(cmdEvent);
1046
1047                         return;
1048                     }
1049                 }
1050
1051                 BeginBatchUndo(_("Insert Text"));
1052
1053                 long newPos = m_caretPosition;
1054                 DeleteSelectedContent(& newPos);
1055
1056 #if wxUSE_UNICODE
1057                 wxString str = event.GetUnicodeKey();
1058 #else
1059                 wxString str = (wxChar) event.GetKeyCode();
1060 #endif
1061                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
1062
1063                 EndBatchUndo();
1064
1065                 SetDefaultStyleToCursorStyle();
1066                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
1067
1068                 GetEventHandler()->ProcessEvent(cmdEvent);
1069
1070                 Update();
1071             }
1072         }
1073     }
1074 }
1075
1076 /// Delete content if there is a selection, e.g. when pressing a key.
1077 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
1078 {
1079     if (HasSelection())
1080     {
1081         long pos = m_selectionRange.GetStart();
1082         GetBuffer().DeleteRangeWithUndo(m_selectionRange, this);
1083         m_selectionRange.SetRange(-2, -2);
1084
1085         if (newPos)
1086             *newPos = pos-1;
1087         return true;
1088     }
1089     else
1090         return false;
1091 }
1092
1093 /// Keyboard navigation
1094
1095 /*
1096
1097 Left:       left one character
1098 Right:      right one character
1099 Up:         up one line
1100 Down:       down one line
1101 Ctrl-Left:  left one word
1102 Ctrl-Right: right one word
1103 Ctrl-Up:    previous paragraph start
1104 Ctrl-Down:  next start of paragraph
1105 Home:       start of line
1106 End:        end of line
1107 Ctrl-Home:  start of document
1108 Ctrl-End:   end of document
1109 Page-Up:    Up a screen
1110 Page-Down:  Down a screen
1111
1112 Maybe:
1113
1114 Ctrl-Alt-PgUp: Start of window
1115 Ctrl-Alt-PgDn: End of window
1116 F8:         Start selection mode
1117 Esc:        End selection mode
1118
1119 Adding Shift does the above but starts/extends selection.
1120
1121
1122  */
1123
1124 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
1125 {
1126     bool success = false;
1127
1128     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
1129     {
1130         if (flags & wxRICHTEXT_CTRL_DOWN)
1131             success = WordRight(1, flags);
1132         else
1133             success = MoveRight(1, flags);
1134     }
1135     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
1136     {
1137         if (flags & wxRICHTEXT_CTRL_DOWN)
1138             success = WordLeft(1, flags);
1139         else
1140             success = MoveLeft(1, flags);
1141     }
1142     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
1143     {
1144         if (flags & wxRICHTEXT_CTRL_DOWN)
1145             success = MoveToParagraphStart(flags);
1146         else
1147             success = MoveUp(1, flags);
1148     }
1149     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
1150     {
1151         if (flags & wxRICHTEXT_CTRL_DOWN)
1152             success = MoveToParagraphEnd(flags);
1153         else
1154             success = MoveDown(1, flags);
1155     }
1156     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
1157     {
1158         success = PageUp(1, flags);
1159     }
1160     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1161     {
1162         success = PageDown(1, flags);
1163     }
1164     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
1165     {
1166         if (flags & wxRICHTEXT_CTRL_DOWN)
1167             success = MoveHome(flags);
1168         else
1169             success = MoveToLineStart(flags);
1170     }
1171     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
1172     {
1173         if (flags & wxRICHTEXT_CTRL_DOWN)
1174             success = MoveEnd(flags);
1175         else
1176             success = MoveToLineEnd(flags);
1177     }
1178
1179     if (success)
1180     {
1181         ScrollIntoView(m_caretPosition, keyCode);
1182         SetDefaultStyleToCursorStyle();
1183     }
1184
1185     return success;
1186 }
1187
1188 /// Extend the selection. Selections are in caret positions.
1189 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
1190 {
1191     if (flags & wxRICHTEXT_SHIFT_DOWN)
1192     {
1193         if (oldPos == newPos)
1194             return false;
1195
1196         wxRichTextRange oldSelection = m_selectionRange;
1197
1198         // If not currently selecting, start selecting
1199         if (m_selectionRange.GetStart() == -2)
1200         {
1201             m_selectionAnchor = oldPos;
1202
1203             if (oldPos > newPos)
1204                 m_selectionRange.SetRange(newPos+1, oldPos);
1205             else
1206                 m_selectionRange.SetRange(oldPos+1, newPos);
1207         }
1208         else
1209         {
1210             // Always ensure that the selection range start is greater than
1211             // the end.
1212             if (newPos > m_selectionAnchor)
1213                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
1214             else if (newPos == m_selectionAnchor)
1215                 m_selectionRange = wxRichTextRange(-2, -2);
1216             else
1217                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
1218         }
1219
1220         RefreshForSelectionChange(oldSelection, m_selectionRange);
1221
1222         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
1223         {
1224             wxLogDebug(wxT("Strange selection range"));
1225         }
1226
1227         return true;
1228     }
1229     else
1230         return false;
1231 }
1232
1233 /// Scroll into view, returning true if we scrolled.
1234 /// This takes a _caret_ position.
1235 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1236 {
1237     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1238
1239     if (!line)
1240         return false;
1241
1242     int ppuX, ppuY;
1243     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1244
1245     int startXUnits, startYUnits;
1246     GetViewStart(& startXUnits, & startYUnits);
1247     int startY = startYUnits * ppuY;
1248
1249     int sx = 0, sy = 0;
1250     GetVirtualSize(& sx, & sy);
1251     int sxUnits = 0;
1252     int syUnits = 0;
1253     if (ppuY != 0)
1254         syUnits = sy/ppuY;
1255
1256     wxRect rect = line->GetRect();
1257
1258     bool scrolled = false;
1259
1260     wxSize clientSize = GetClientSize();
1261     clientSize.y -= GetBuffer().GetBottomMargin();
1262
1263     if (GetWindowStyle() & wxRE_CENTRE_CARET)
1264     {
1265         int y = rect.y - GetClientSize().y/2;
1266         int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1267         if (y >= 0 && (y + clientSize.y) < GetBuffer().GetCachedSize().y)
1268         {
1269             if (startYUnits != yUnits)
1270             {
1271                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1272                 scrolled = true;
1273             }
1274 #if !wxRICHTEXT_USE_OWN_CARET
1275             if (scrolled)
1276 #endif
1277                 PositionCaret();
1278
1279             return scrolled;
1280         }
1281     }
1282
1283     // Going down
1284     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1285         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1286         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1287         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1288     {
1289         if ((rect.y + rect.height) > (clientSize.y + startY))
1290         {
1291             // Make it scroll so this item is at the bottom
1292             // of the window
1293             int y = rect.y - (clientSize.y - rect.height);
1294             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1295
1296             // If we're still off the screen, scroll another line down
1297             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1298                 yUnits ++;
1299
1300             if (startYUnits != yUnits)
1301             {
1302                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1303                 scrolled = true;
1304             }
1305         }
1306         else if (rect.y < (startY + GetBuffer().GetTopMargin()))
1307         {
1308             // Make it scroll so this item is at the top
1309             // of the window
1310             int y = rect.y - GetBuffer().GetTopMargin();
1311             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1312
1313             if (startYUnits != yUnits)
1314             {
1315                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1316                 scrolled = true;
1317             }
1318         }
1319     }
1320     // Going up
1321     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1322              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1323              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1324              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1325     {
1326         if (rect.y < (startY + GetBuffer().GetBottomMargin()))
1327         {
1328             // Make it scroll so this item is at the top
1329             // of the window
1330             int y = rect.y - GetBuffer().GetTopMargin();
1331             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1332
1333             if (startYUnits != yUnits)
1334             {
1335                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1336                 scrolled = true;
1337             }
1338         }
1339         else if ((rect.y + rect.height) > (clientSize.y + startY))
1340         {
1341             // Make it scroll so this item is at the bottom
1342             // of the window
1343             int y = rect.y - (clientSize.y - rect.height);
1344             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1345
1346             // If we're still off the screen, scroll another line down
1347             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1348                 yUnits ++;
1349
1350             if (startYUnits != yUnits)
1351             {
1352                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1353                 scrolled = true;
1354             }
1355         }
1356     }
1357
1358 #if !wxRICHTEXT_USE_OWN_CARET
1359     if (scrolled)
1360 #endif
1361         PositionCaret();
1362
1363     return scrolled;
1364 }
1365
1366 /// Is the given position visible on the screen?
1367 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1368 {
1369     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1370
1371     if (!line)
1372         return false;
1373
1374     int ppuX, ppuY;
1375     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1376
1377     int startX, startY;
1378     GetViewStart(& startX, & startY);
1379     startX = 0;
1380     startY = startY * ppuY;
1381
1382     wxRect rect = line->GetRect();
1383     wxSize clientSize = GetClientSize();
1384     clientSize.y -= GetBuffer().GetBottomMargin();
1385
1386     return (rect.GetBottom() > (startY + GetBuffer().GetTopMargin())) && (rect.GetTop() < (startY + clientSize.y));
1387 }
1388
1389 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1390 {
1391     m_caretPosition = position;
1392     m_caretAtLineStart = showAtLineStart;
1393 }
1394
1395 /// Move caret one visual step forward: this may mean setting a flag
1396 /// and keeping the same position if we're going from the end of one line
1397 /// to the start of the next, which may be the exact same caret position.
1398 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1399 {
1400     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1401
1402     // Only do the check if we're not at the end of the paragraph (where things work OK
1403     // anyway)
1404     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1405     {
1406         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1407
1408         if (line)
1409         {
1410             wxRichTextRange lineRange = line->GetAbsoluteRange();
1411
1412             // We're at the end of a line. See whether we need to
1413             // stay at the same actual caret position but change visual
1414             // position, or not.
1415             if (oldPosition == lineRange.GetEnd())
1416             {
1417                 if (m_caretAtLineStart)
1418                 {
1419                     // We're already at the start of the line, so actually move on now.
1420                     m_caretPosition = oldPosition + 1;
1421                     m_caretAtLineStart = false;
1422                 }
1423                 else
1424                 {
1425                     // We're showing at the end of the line, so keep to
1426                     // the same position but indicate that we're to show
1427                     // at the start of the next line.
1428                     m_caretPosition = oldPosition;
1429                     m_caretAtLineStart = true;
1430                 }
1431                 SetDefaultStyleToCursorStyle();
1432                 return;
1433             }
1434         }
1435     }
1436     m_caretPosition ++;
1437     SetDefaultStyleToCursorStyle();
1438 }
1439
1440 /// Move caret one visual step backward: this may mean setting a flag
1441 /// and keeping the same position if we're going from the end of one line
1442 /// to the start of the next, which may be the exact same caret position.
1443 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1444 {
1445     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1446
1447     // Only do the check if we're not at the start of the paragraph (where things work OK
1448     // anyway)
1449     if (para && (oldPosition != para->GetRange().GetStart()))
1450     {
1451         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1452
1453         if (line)
1454         {
1455             wxRichTextRange lineRange = line->GetAbsoluteRange();
1456
1457             // We're at the start of a line. See whether we need to
1458             // stay at the same actual caret position but change visual
1459             // position, or not.
1460             if (oldPosition == lineRange.GetStart())
1461             {
1462                 m_caretPosition = oldPosition-1;
1463                 m_caretAtLineStart = true;
1464                 return;
1465             }
1466             else if (oldPosition == lineRange.GetEnd())
1467             {
1468                 if (m_caretAtLineStart)
1469                 {
1470                     // We're at the start of the line, so keep the same caret position
1471                     // but clear the start-of-line flag.
1472                     m_caretPosition = oldPosition;
1473                     m_caretAtLineStart = false;
1474                 }
1475                 else
1476                 {
1477                     // We're showing at the end of the line, so go back
1478                     // to the previous character position.
1479                     m_caretPosition = oldPosition - 1;
1480                 }
1481                 SetDefaultStyleToCursorStyle();
1482                 return;
1483             }
1484         }
1485     }
1486     m_caretPosition --;
1487     SetDefaultStyleToCursorStyle();
1488 }
1489
1490 /// Move right
1491 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1492 {
1493     long endPos = GetBuffer().GetRange().GetEnd();
1494
1495     if (m_caretPosition + noPositions < endPos)
1496     {
1497         long oldPos = m_caretPosition;
1498         long newPos = m_caretPosition + noPositions;
1499
1500         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1501         if (!extendSel)
1502             SelectNone();
1503
1504         // Determine by looking at oldPos and m_caretPosition whether
1505         // we moved from the end of a line to the start of the next line, in which case
1506         // we want to adjust the caret position such that it is positioned at the
1507         // start of the next line, rather than jumping past the first character of the
1508         // line.
1509         if (noPositions == 1 && !extendSel)
1510             MoveCaretForward(oldPos);
1511         else
1512             SetCaretPosition(newPos);
1513
1514         PositionCaret();
1515         SetDefaultStyleToCursorStyle();
1516
1517         return true;
1518     }
1519     else
1520         return false;
1521 }
1522
1523 /// Move left
1524 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1525 {
1526     long startPos = -1;
1527
1528     if (m_caretPosition > startPos - noPositions + 1)
1529     {
1530         long oldPos = m_caretPosition;
1531         long newPos = m_caretPosition - noPositions;
1532         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1533         if (!extendSel)
1534             SelectNone();
1535
1536         if (noPositions == 1 && !extendSel)
1537             MoveCaretBack(oldPos);
1538         else
1539             SetCaretPosition(newPos);
1540
1541         PositionCaret();
1542         SetDefaultStyleToCursorStyle();
1543
1544         return true;
1545     }
1546     else
1547         return false;
1548 }
1549
1550 /// Move up
1551 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1552 {
1553     return MoveDown(- noLines, flags);
1554 }
1555
1556 /// Move up
1557 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1558 {
1559     if (!GetCaret())
1560         return false;
1561
1562     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1563     wxPoint pt = GetCaret()->GetPosition();
1564     long newLine = lineNumber + noLines;
1565
1566     if (lineNumber != -1)
1567     {
1568         if (noLines > 0)
1569         {
1570             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1571
1572             if (newLine > lastLine)
1573                 return false;
1574         }
1575         else
1576         {
1577             if (newLine < 0)
1578                 return false;
1579         }
1580     }
1581
1582     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1583     if (lineObj)
1584     {
1585         pt.y = lineObj->GetAbsolutePosition().y + 2;
1586     }
1587     else
1588         return false;
1589
1590     long newPos = 0;
1591     wxClientDC dc(this);
1592     PrepareDC(dc);
1593     dc.SetFont(GetFont());
1594
1595     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1596
1597     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1598     {
1599         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1600         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1601         // so we view the caret at the start of the line.
1602         bool caretLineStart = false;
1603         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1604         {
1605             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1606             wxRichTextRange lineRange;
1607             if (thisLine)
1608                 lineRange = thisLine->GetAbsoluteRange();
1609
1610             if (thisLine && (newPos-1) == lineRange.GetEnd())
1611             {
1612                 newPos --;
1613                 caretLineStart = true;
1614             }
1615             else
1616             {
1617                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1618                 if (para && para->GetRange().GetStart() == newPos)
1619                     newPos --;
1620             }
1621         }
1622
1623         long newSelEnd = newPos;
1624
1625         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1626         if (!extendSel)
1627             SelectNone();
1628
1629         SetCaretPosition(newPos, caretLineStart);
1630         PositionCaret();
1631         SetDefaultStyleToCursorStyle();
1632
1633         return true;
1634     }
1635
1636     return false;
1637 }
1638
1639 /// Move to the end of the paragraph
1640 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1641 {
1642     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1643     if (para)
1644     {
1645         long newPos = para->GetRange().GetEnd() - 1;
1646         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1647         if (!extendSel)
1648             SelectNone();
1649
1650         SetCaretPosition(newPos);
1651         PositionCaret();
1652         SetDefaultStyleToCursorStyle();
1653
1654         return true;
1655     }
1656
1657     return false;
1658 }
1659
1660 /// Move to the start of the paragraph
1661 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1662 {
1663     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1664     if (para)
1665     {
1666         long newPos = para->GetRange().GetStart() - 1;
1667         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1668         if (!extendSel)
1669             SelectNone();
1670
1671         SetCaretPosition(newPos);
1672         PositionCaret();
1673         SetDefaultStyleToCursorStyle();
1674
1675         return true;
1676     }
1677
1678     return false;
1679 }
1680
1681 /// Move to the end of the line
1682 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1683 {
1684     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1685
1686     if (line)
1687     {
1688         wxRichTextRange lineRange = line->GetAbsoluteRange();
1689         long newPos = lineRange.GetEnd();
1690         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1691         if (!extendSel)
1692             SelectNone();
1693
1694         SetCaretPosition(newPos);
1695         PositionCaret();
1696         SetDefaultStyleToCursorStyle();
1697
1698         return true;
1699     }
1700
1701     return false;
1702 }
1703
1704 /// Move to the start of the line
1705 bool wxRichTextCtrl::MoveToLineStart(int flags)
1706 {
1707     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1708     if (line)
1709     {
1710         wxRichTextRange lineRange = line->GetAbsoluteRange();
1711         long newPos = lineRange.GetStart()-1;
1712
1713         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1714         if (!extendSel)
1715             SelectNone();
1716
1717         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1718
1719         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1720         PositionCaret();
1721         SetDefaultStyleToCursorStyle();
1722
1723         return true;
1724     }
1725
1726     return false;
1727 }
1728
1729 /// Move to the start of the buffer
1730 bool wxRichTextCtrl::MoveHome(int flags)
1731 {
1732     if (m_caretPosition != -1)
1733     {
1734         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1735         if (!extendSel)
1736             SelectNone();
1737
1738         SetCaretPosition(-1);
1739         PositionCaret();
1740         SetDefaultStyleToCursorStyle();
1741
1742         return true;
1743     }
1744     else
1745         return false;
1746 }
1747
1748 /// Move to the end of the buffer
1749 bool wxRichTextCtrl::MoveEnd(int flags)
1750 {
1751     long endPos = GetBuffer().GetRange().GetEnd()-1;
1752
1753     if (m_caretPosition != endPos)
1754     {
1755         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1756         if (!extendSel)
1757             SelectNone();
1758
1759         SetCaretPosition(endPos);
1760         PositionCaret();
1761         SetDefaultStyleToCursorStyle();
1762
1763         return true;
1764     }
1765     else
1766         return false;
1767 }
1768
1769 /// Move noPages pages up
1770 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1771 {
1772     return PageDown(- noPages, flags);
1773 }
1774
1775 /// Move noPages pages down
1776 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1777 {
1778     // Calculate which line occurs noPages * screen height further down.
1779     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1780     if (line)
1781     {
1782         wxSize clientSize = GetClientSize();
1783         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1784
1785         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1786         if (newLine)
1787         {
1788             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1789             long pos = lineRange.GetStart()-1;
1790             if (pos != m_caretPosition)
1791             {
1792                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1793
1794                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1795                 if (!extendSel)
1796                     SelectNone();
1797
1798                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1799                 PositionCaret();
1800                 SetDefaultStyleToCursorStyle();
1801
1802                 return true;
1803             }
1804         }
1805     }
1806
1807     return false;
1808 }
1809
1810 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1811 {
1812     return str == wxT(" ") || str == wxT("\t");
1813 }
1814
1815 // Finds the caret position for the next word
1816 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1817 {
1818     long endPos = GetBuffer().GetRange().GetEnd();
1819
1820     if (direction > 0)
1821     {
1822         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1823
1824         // First skip current text to space
1825         while (i < endPos && i > -1)
1826         {
1827             // i is in character, not caret positions
1828             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1829             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1830             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1831             {
1832                 break;
1833             }
1834             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1835                 i += direction;
1836             else
1837             {
1838                 break;
1839             }
1840         }
1841         while (i < endPos && i > -1)
1842         {
1843             // i is in character, not caret positions
1844             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1845             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1846             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1847                 return wxMax(-1, i);
1848
1849             if (text.empty()) // End of paragraph, or maybe an image
1850                 return wxMax(-1, i - 1);
1851             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1852                 i += direction;
1853             else
1854             {
1855                 // Convert to caret position
1856                 return wxMax(-1, i - 1);
1857             }
1858         }
1859         if (i >= endPos)
1860             return endPos-1;
1861         return i-1;
1862     }
1863     else
1864     {
1865         long i = m_caretPosition;
1866
1867         // First skip white space
1868         while (i < endPos && i > -1)
1869         {
1870             // i is in character, not caret positions
1871             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1872             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1873
1874             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1875                 break;
1876             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1877                 i += direction;
1878             else
1879                 break;
1880         }
1881         // Next skip current text to space
1882         while (i < endPos && i > -1)
1883         {
1884             // i is in character, not caret positions
1885             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1886             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1887             if (line && line->GetAbsoluteRange().GetStart() == i)
1888                 return i-1;
1889
1890             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1891                 i += direction;
1892             else
1893             {
1894                 return i;
1895             }
1896         }
1897         if (i < -1)
1898             return -1;
1899         return i;
1900     }
1901 }
1902
1903 /// Move n words left
1904 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1905 {
1906     long pos = FindNextWordPosition(-1);
1907     if (pos != m_caretPosition)
1908     {
1909         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1910
1911         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1912         if (!extendSel)
1913             SelectNone();
1914
1915         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1916         PositionCaret();
1917         SetDefaultStyleToCursorStyle();
1918
1919         return true;
1920     }
1921
1922     return false;
1923 }
1924
1925 /// Move n words right
1926 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1927 {
1928     long pos = FindNextWordPosition(1);
1929     if (pos != m_caretPosition)
1930     {
1931         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1932
1933         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1934         if (!extendSel)
1935             SelectNone();
1936
1937         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1938         PositionCaret();
1939         SetDefaultStyleToCursorStyle();
1940
1941         return true;
1942     }
1943
1944     return false;
1945 }
1946
1947 /// Sizing
1948 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1949 {
1950     // Only do sizing optimization for large buffers
1951     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1952     {
1953         m_fullLayoutRequired = true;
1954         m_fullLayoutTime = wxGetLocalTimeMillis();
1955         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1956         LayoutContent(true /* onlyVisibleRect */);
1957     }
1958     else
1959         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1960
1961 #if wxRICHTEXT_BUFFERED_PAINTING
1962     RecreateBuffer();
1963 #endif
1964
1965     event.Skip();
1966 }
1967
1968
1969 /// Idle-time processing
1970 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1971 {
1972 #if wxRICHTEXT_USE_OWN_CARET
1973     if (((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
1974     {
1975         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate(false);
1976         PositionCaret();
1977         GetCaret()->Show();
1978     }
1979 #endif
1980
1981     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1982
1983     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1984     {
1985         m_fullLayoutRequired = false;
1986         m_fullLayoutTime = 0;
1987         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1988         ShowPosition(m_fullLayoutSavedPosition);
1989         Refresh(false);
1990     }
1991
1992     if (m_caretPositionForDefaultStyle != -2)
1993     {
1994         // If the caret position has changed, no longer reflect the default style
1995         // in the UI.
1996         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1997             m_caretPositionForDefaultStyle = -2;
1998     }
1999
2000     event.Skip();
2001 }
2002
2003 /// Scrolling
2004 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
2005 {
2006 #if wxRICHTEXT_USE_OWN_CARET
2007     if (!((wxRichTextCaret*) GetCaret())->GetNeedsUpdate())
2008     {
2009         GetCaret()->Hide();
2010         ((wxRichTextCaret*) GetCaret())->SetNeedsUpdate();
2011     }
2012 #endif
2013
2014     event.Skip();
2015 }
2016
2017 /// Set up scrollbars, e.g. after a resize
2018 void wxRichTextCtrl::SetupScrollbars(bool atTop)
2019 {
2020     if (IsFrozen())
2021         return;
2022
2023     if (GetBuffer().IsEmpty())
2024     {
2025         SetScrollbars(0, 0, 0, 0, 0, 0);
2026         return;
2027     }
2028
2029     // TODO: reimplement scrolling so we scroll by line, not by fixed number
2030     // of pixels. See e.g. wxVScrolledWindow for ideas.
2031     int pixelsPerUnit = 5;
2032     wxSize clientSize = GetClientSize();
2033
2034     int maxHeight = GetBuffer().GetCachedSize().y + GetBuffer().GetTopMargin();
2035
2036     // Round up so we have at least maxHeight pixels
2037     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
2038
2039     int startX = 0, startY = 0;
2040     if (!atTop)
2041         GetViewStart(& startX, & startY);
2042
2043     int maxPositionX = 0;
2044     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
2045
2046     int newStartX = wxMin(maxPositionX, startX);
2047     int newStartY = wxMin(maxPositionY, startY);
2048
2049     int oldPPUX, oldPPUY;
2050     int oldStartX, oldStartY;
2051     int oldVirtualSizeX = 0, oldVirtualSizeY = 0;
2052     GetScrollPixelsPerUnit(& oldPPUX, & oldPPUY);
2053     GetViewStart(& oldStartX, & oldStartY);
2054     GetVirtualSize(& oldVirtualSizeX, & oldVirtualSizeY);
2055     if (oldPPUY > 0)
2056         oldVirtualSizeY /= oldPPUY;
2057
2058     if (oldPPUX == 0 && oldPPUY == pixelsPerUnit && oldVirtualSizeY == unitsY && oldStartX == newStartX && oldStartY == newStartY)
2059         return;
2060
2061     // Don't set scrollbars if there were none before, and there will be none now.
2062     if (oldPPUY != 0 && (oldVirtualSizeY < clientSize.y) && (unitsY*pixelsPerUnit < clientSize.y))
2063         return;
2064
2065     // Move to previous scroll position if
2066     // possible
2067     SetScrollbars(0, pixelsPerUnit, 0, unitsY, newStartX, newStartY);
2068 }
2069
2070 /// Paint the background
2071 void wxRichTextCtrl::PaintBackground(wxDC& dc)
2072 {
2073     wxColour backgroundColour = GetBackgroundColour();
2074     if (!backgroundColour.Ok())
2075         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
2076
2077     // Clear the background
2078     dc.SetBrush(wxBrush(backgroundColour));
2079     dc.SetPen(*wxTRANSPARENT_PEN);
2080     wxRect windowRect(GetClientSize());
2081     windowRect.x -= 2; windowRect.y -= 2;
2082     windowRect.width += 4; windowRect.height += 4;
2083
2084     // We need to shift the rectangle to take into account
2085     // scrolling. Converting device to logical coordinates.
2086     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
2087     dc.DrawRectangle(windowRect);
2088 }
2089
2090 #if wxRICHTEXT_BUFFERED_PAINTING
2091 /// Recreate buffer bitmap if necessary
2092 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
2093 {
2094     wxSize sz = size;
2095     if (sz == wxDefaultSize)
2096         sz = GetClientSize();
2097
2098     if (sz.x < 1 || sz.y < 1)
2099         return false;
2100
2101     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
2102         m_bufferBitmap = wxBitmap(sz.x, sz.y);
2103     return m_bufferBitmap.Ok();
2104 }
2105 #endif
2106
2107 // ----------------------------------------------------------------------------
2108 // file IO functions
2109 // ----------------------------------------------------------------------------
2110
2111 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
2112 {
2113     bool success = GetBuffer().LoadFile(filename, (wxRichTextFileType)fileType);
2114     if (success)
2115         m_filename = filename;
2116
2117     DiscardEdits();
2118     SetInsertionPoint(0);
2119     LayoutContent();
2120     PositionCaret();
2121     SetupScrollbars(true);
2122     Refresh(false);
2123     wxTextCtrl::SendTextUpdatedEvent(this);
2124
2125     if (success)
2126         return true;
2127     else
2128     {
2129         wxLogError(_("File couldn't be loaded."));
2130
2131         return false;
2132     }
2133 }
2134
2135 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
2136 {
2137     if (GetBuffer().SaveFile(filename, (wxRichTextFileType)fileType))
2138     {
2139         m_filename = filename;
2140
2141         DiscardEdits();
2142
2143         return true;
2144     }
2145
2146     wxLogError(_("The text couldn't be saved."));
2147
2148     return false;
2149 }
2150
2151 // ----------------------------------------------------------------------------
2152 // wxRichTextCtrl specific functionality
2153 // ----------------------------------------------------------------------------
2154
2155 /// Add a new paragraph of text to the end of the buffer
2156 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
2157 {
2158     wxRichTextRange range = GetBuffer().AddParagraph(text);
2159     LayoutContent();
2160     return range;
2161 }
2162
2163 /// Add an image
2164 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
2165 {
2166     wxRichTextRange range = GetBuffer().AddImage(image);
2167     LayoutContent();
2168     return range;
2169 }
2170
2171 // ----------------------------------------------------------------------------
2172 // selection and ranges
2173 // ----------------------------------------------------------------------------
2174
2175 void wxRichTextCtrl::SelectAll()
2176 {
2177     SetSelection(-1, -1);
2178 }
2179
2180 /// Select none
2181 void wxRichTextCtrl::SelectNone()
2182 {
2183     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
2184     {
2185         wxRichTextRange oldSelection = m_selectionRange;
2186
2187         m_selectionRange = wxRichTextRange(-2, -2);
2188
2189         RefreshForSelectionChange(oldSelection, m_selectionRange);
2190     }
2191     m_selectionAnchor = -2;
2192 }
2193
2194 static bool wxIsWordDelimiter(const wxString& text)
2195 {
2196     return !text.IsEmpty() && !wxIsalnum(text[0]);
2197 }
2198
2199 /// Select the word at the given character position
2200 bool wxRichTextCtrl::SelectWord(long position)
2201 {
2202     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
2203         return false;
2204
2205     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
2206     if (!para)
2207         return false;
2208
2209     if (position == para->GetRange().GetEnd())
2210         position --;
2211
2212     long positionStart = position;
2213     long positionEnd = position;
2214
2215     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
2216     {
2217         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
2218         if (wxIsWordDelimiter(text))
2219         {
2220             positionStart ++;
2221             break;
2222         }
2223     }
2224     if (positionStart < para->GetRange().GetStart())
2225         positionStart = para->GetRange().GetStart();
2226
2227     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
2228     {
2229         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
2230         if (wxIsWordDelimiter(text))
2231         {
2232             positionEnd --;
2233             break;
2234         }
2235     }
2236     if (positionEnd >= para->GetRange().GetEnd())
2237         positionEnd = para->GetRange().GetEnd();
2238
2239     if (positionEnd < positionStart)
2240         return false;
2241
2242     SetSelection(positionStart, positionEnd+1);
2243
2244     if (positionStart >= 0)
2245     {
2246         MoveCaret(positionStart-1, true);
2247         SetDefaultStyleToCursorStyle();
2248     }
2249
2250     return true;
2251 }
2252
2253 wxString wxRichTextCtrl::GetStringSelection() const
2254 {
2255     long from, to;
2256     GetSelection(&from, &to);
2257
2258     return GetRange(from, to);
2259 }
2260
2261 // ----------------------------------------------------------------------------
2262 // hit testing
2263 // ----------------------------------------------------------------------------
2264
2265 wxTextCtrlHitTestResult
2266 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2267 {
2268     // implement in terms of the other overload as the native ports typically
2269     // can get the position and not (x, y) pair directly (although wxUniv
2270     // directly gets x and y -- and so overrides this method as well)
2271     long pos;
2272     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2273
2274     if ( rc != wxTE_HT_UNKNOWN )
2275     {
2276         PositionToXY(pos, x, y);
2277     }
2278
2279     return rc;
2280 }
2281
2282 wxTextCtrlHitTestResult
2283 wxRichTextCtrl::HitTest(const wxPoint& pt,
2284                         long * pos) const
2285 {
2286     wxClientDC dc((wxRichTextCtrl*) this);
2287     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2288
2289     // Buffer uses logical position (relative to start of buffer)
2290     // so convert
2291     wxPoint pt2 = GetLogicalPoint(pt);
2292
2293     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
2294
2295     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2296         return wxTE_HT_BEFORE;
2297     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2298         return wxTE_HT_BEYOND;
2299     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2300         return wxTE_HT_ON_TEXT;
2301
2302     return wxTE_HT_UNKNOWN;
2303 }
2304
2305 // ----------------------------------------------------------------------------
2306 // set/get the controls text
2307 // ----------------------------------------------------------------------------
2308
2309 wxString wxRichTextCtrl::DoGetValue() const
2310 {
2311     return GetBuffer().GetText();
2312 }
2313
2314 wxString wxRichTextCtrl::GetRange(long from, long to) const
2315 {
2316     // Public API for range is different from internals
2317     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2318 }
2319
2320 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2321 {
2322     // Don't call Clear here, since it always sends a text updated event
2323     m_buffer.ResetAndClearCommands();
2324     m_buffer.SetDirty(true);
2325     m_caretPosition = -1;
2326     m_caretPositionForDefaultStyle = -2;
2327     m_caretAtLineStart = false;
2328     m_selectionRange.SetRange(-2, -2);
2329
2330     Scroll(0,0);
2331
2332     if (!IsFrozen())
2333     {
2334         LayoutContent();
2335         Refresh(false);
2336     }
2337
2338     if (!value.IsEmpty())
2339     {
2340         // Remove empty paragraph
2341         GetBuffer().Clear();
2342         DoWriteText(value, flags);
2343
2344         // for compatibility, don't move the cursor when doing SetValue()
2345         SetInsertionPoint(0);
2346     }
2347     else
2348     {
2349         // still send an event for consistency
2350         if (flags & SetValue_SendEvent)
2351             wxTextCtrl::SendTextUpdatedEvent(this);
2352     }
2353     DiscardEdits();
2354 }
2355
2356 void wxRichTextCtrl::WriteText(const wxString& value)
2357 {
2358     DoWriteText(value);
2359 }
2360
2361 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2362 {
2363     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2364
2365     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2366
2367     if ( flags & SetValue_SendEvent )
2368         wxTextCtrl::SendTextUpdatedEvent(this);
2369 }
2370
2371 void wxRichTextCtrl::AppendText(const wxString& text)
2372 {
2373     SetInsertionPointEnd();
2374
2375     WriteText(text);
2376 }
2377
2378 /// Write an image at the current insertion point
2379 bool wxRichTextCtrl::WriteImage(const wxImage& image, wxBitmapType bitmapType)
2380 {
2381     wxRichTextImageBlock imageBlock;
2382
2383     wxImage image2 = image;
2384     if (imageBlock.MakeImageBlock(image2, bitmapType))
2385         return WriteImage(imageBlock);
2386
2387     return false;
2388 }
2389
2390 bool wxRichTextCtrl::WriteImage(const wxString& filename, wxBitmapType bitmapType)
2391 {
2392     wxRichTextImageBlock imageBlock;
2393
2394     wxImage image;
2395     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2396         return WriteImage(imageBlock);
2397
2398     return false;
2399 }
2400
2401 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2402 {
2403     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2404 }
2405
2406 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, wxBitmapType bitmapType)
2407 {
2408     if (bitmap.Ok())
2409     {
2410         wxRichTextImageBlock imageBlock;
2411
2412         wxImage image = bitmap.ConvertToImage();
2413         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2414             return WriteImage(imageBlock);
2415     }
2416
2417     return false;
2418 }
2419
2420 /// Insert a newline (actually paragraph) at the current insertion point.
2421 bool wxRichTextCtrl::Newline()
2422 {
2423     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2424 }
2425
2426 /// Insert a line break at the current insertion point.
2427 bool wxRichTextCtrl::LineBreak()
2428 {
2429     wxString text;
2430     text = wxRichTextLineBreakChar;
2431     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2432 }
2433
2434 // ----------------------------------------------------------------------------
2435 // Clipboard operations
2436 // ----------------------------------------------------------------------------
2437
2438 void wxRichTextCtrl::Copy()
2439 {
2440     if (CanCopy())
2441     {
2442         wxRichTextRange range = GetInternalSelectionRange();
2443         GetBuffer().CopyToClipboard(range);
2444     }
2445 }
2446
2447 void wxRichTextCtrl::Cut()
2448 {
2449     if (CanCut())
2450     {
2451         wxRichTextRange range = GetInternalSelectionRange();
2452         GetBuffer().CopyToClipboard(range);
2453
2454         DeleteSelectedContent();
2455         LayoutContent();
2456         Refresh(false);
2457     }
2458 }
2459
2460 void wxRichTextCtrl::Paste()
2461 {
2462     if (CanPaste())
2463     {
2464         BeginBatchUndo(_("Paste"));
2465
2466         long newPos = m_caretPosition;
2467         DeleteSelectedContent(& newPos);
2468
2469         GetBuffer().PasteFromClipboard(newPos);
2470
2471         EndBatchUndo();
2472     }
2473 }
2474
2475 void wxRichTextCtrl::DeleteSelection()
2476 {
2477     if (CanDeleteSelection())
2478     {
2479         DeleteSelectedContent();
2480     }
2481 }
2482
2483 bool wxRichTextCtrl::HasSelection() const
2484 {
2485     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2486 }
2487
2488 bool wxRichTextCtrl::CanCopy() const
2489 {
2490     // Can copy if there's a selection
2491     return HasSelection();
2492 }
2493
2494 bool wxRichTextCtrl::CanCut() const
2495 {
2496     return HasSelection() && IsEditable();
2497 }
2498
2499 bool wxRichTextCtrl::CanPaste() const
2500 {
2501     if ( !IsEditable() )
2502         return false;
2503
2504     return GetBuffer().CanPasteFromClipboard();
2505 }
2506
2507 bool wxRichTextCtrl::CanDeleteSelection() const
2508 {
2509     return HasSelection() && IsEditable();
2510 }
2511
2512
2513 // ----------------------------------------------------------------------------
2514 // Accessors
2515 // ----------------------------------------------------------------------------
2516
2517 void wxRichTextCtrl::SetContextMenu(wxMenu* menu)
2518 {
2519     if (m_contextMenu && m_contextMenu != menu)
2520         delete m_contextMenu;
2521     m_contextMenu = menu;
2522 }
2523
2524 void wxRichTextCtrl::SetEditable(bool editable)
2525 {
2526     m_editable = editable;
2527 }
2528
2529 void wxRichTextCtrl::SetInsertionPoint(long pos)
2530 {
2531     SelectNone();
2532
2533     m_caretPosition = pos - 1;
2534
2535     PositionCaret();
2536
2537     SetDefaultStyleToCursorStyle();
2538 }
2539
2540 void wxRichTextCtrl::SetInsertionPointEnd()
2541 {
2542     long pos = GetLastPosition();
2543     SetInsertionPoint(pos);
2544 }
2545
2546 long wxRichTextCtrl::GetInsertionPoint() const
2547 {
2548     return m_caretPosition+1;
2549 }
2550
2551 wxTextPos wxRichTextCtrl::GetLastPosition() const
2552 {
2553     return GetBuffer().GetRange().GetEnd();
2554 }
2555
2556 // If the return values from and to are the same, there is no
2557 // selection.
2558 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2559 {
2560     *from = m_selectionRange.GetStart();
2561     *to = m_selectionRange.GetEnd();
2562     if ((*to) != -1 && (*to) != -2)
2563         (*to) ++;
2564 }
2565
2566 bool wxRichTextCtrl::IsEditable() const
2567 {
2568     return m_editable;
2569 }
2570
2571 // ----------------------------------------------------------------------------
2572 // selection
2573 // ----------------------------------------------------------------------------
2574
2575 void wxRichTextCtrl::SetSelection(long from, long to)
2576 {
2577     // if from and to are both -1, it means (in wxWidgets) that all text should
2578     // be selected.
2579     if ( (from == -1) && (to == -1) )
2580     {
2581         from = 0;
2582         to = GetLastPosition()+1;
2583     }
2584
2585     if (from == to)
2586     {
2587         SelectNone();
2588     }
2589     else
2590     {
2591         wxRichTextRange oldSelection = m_selectionRange;
2592         m_selectionAnchor = from;
2593         m_selectionRange.SetRange(from, to-1);
2594
2595         // Have to subtract 2, one because of endPos+1 rule (SetSelection docs) and another to turn into caret position.
2596         m_caretPosition = wxMax(-1, to-2);
2597
2598         RefreshForSelectionChange(oldSelection, m_selectionRange);
2599         PositionCaret();
2600     }
2601 }
2602
2603 // ----------------------------------------------------------------------------
2604 // Editing
2605 // ----------------------------------------------------------------------------
2606
2607 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2608                              const wxString& value)
2609 {
2610     BeginBatchUndo(_("Replace"));
2611
2612     DeleteSelectedContent();
2613
2614     DoWriteText(value, SetValue_SelectionOnly);
2615
2616     EndBatchUndo();
2617 }
2618
2619 void wxRichTextCtrl::Remove(long from, long to)
2620 {
2621     SelectNone();
2622
2623     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to-1), this);
2624
2625     LayoutContent();
2626     if (!IsFrozen())
2627         Refresh(false);
2628 }
2629
2630 bool wxRichTextCtrl::IsModified() const
2631 {
2632     return m_buffer.IsModified();
2633 }
2634
2635 void wxRichTextCtrl::MarkDirty()
2636 {
2637     m_buffer.Modify(true);
2638 }
2639
2640 void wxRichTextCtrl::DiscardEdits()
2641 {
2642     m_caretPositionForDefaultStyle = -2;
2643     m_buffer.Modify(false);
2644     m_buffer.GetCommandProcessor()->ClearCommands();
2645 }
2646
2647 int wxRichTextCtrl::GetNumberOfLines() const
2648 {
2649     return GetBuffer().GetParagraphCount();
2650 }
2651
2652 // ----------------------------------------------------------------------------
2653 // Positions <-> coords
2654 // ----------------------------------------------------------------------------
2655
2656 long wxRichTextCtrl::XYToPosition(long x, long y) const
2657 {
2658     return GetBuffer().XYToPosition(x, y);
2659 }
2660
2661 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2662 {
2663     return GetBuffer().PositionToXY(pos, x, y);
2664 }
2665
2666 // ----------------------------------------------------------------------------
2667 //
2668 // ----------------------------------------------------------------------------
2669
2670 void wxRichTextCtrl::ShowPosition(long pos)
2671 {
2672     if (!IsPositionVisible(pos))
2673         ScrollIntoView(pos-1, WXK_DOWN);
2674 }
2675
2676 int wxRichTextCtrl::GetLineLength(long lineNo) const
2677 {
2678     return GetBuffer().GetParagraphLength(lineNo);
2679 }
2680
2681 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2682 {
2683     return GetBuffer().GetParagraphText(lineNo);
2684 }
2685
2686 // ----------------------------------------------------------------------------
2687 // Undo/redo
2688 // ----------------------------------------------------------------------------
2689
2690 void wxRichTextCtrl::Undo()
2691 {
2692     if (CanUndo())
2693     {
2694         GetCommandProcessor()->Undo();
2695     }
2696 }
2697
2698 void wxRichTextCtrl::Redo()
2699 {
2700     if (CanRedo())
2701     {
2702         GetCommandProcessor()->Redo();
2703     }
2704 }
2705
2706 bool wxRichTextCtrl::CanUndo() const
2707 {
2708     return GetCommandProcessor()->CanUndo();
2709 }
2710
2711 bool wxRichTextCtrl::CanRedo() const
2712 {
2713     return GetCommandProcessor()->CanRedo();
2714 }
2715
2716 // ----------------------------------------------------------------------------
2717 // implementation details
2718 // ----------------------------------------------------------------------------
2719
2720 void wxRichTextCtrl::Command(wxCommandEvent& event)
2721 {
2722     SetValue(event.GetString());
2723     GetEventHandler()->ProcessEvent(event);
2724 }
2725
2726 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2727 {
2728     // By default, load the first file into the text window.
2729     if (event.GetNumberOfFiles() > 0)
2730     {
2731         LoadFile(event.GetFiles()[0]);
2732     }
2733 }
2734
2735 wxSize wxRichTextCtrl::DoGetBestSize() const
2736 {
2737     return wxSize(10, 10);
2738 }
2739
2740 // ----------------------------------------------------------------------------
2741 // standard handlers for standard edit menu events
2742 // ----------------------------------------------------------------------------
2743
2744 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2745 {
2746     Cut();
2747 }
2748
2749 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2750 {
2751     DeleteSelection();
2752 }
2753
2754 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2755 {
2756     Copy();
2757 }
2758
2759 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2760 {
2761     Paste();
2762 }
2763
2764 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2765 {
2766     Undo();
2767 }
2768
2769 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2770 {
2771     Redo();
2772 }
2773
2774 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2775 {
2776     event.Enable( CanCut() );
2777 }
2778
2779 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2780 {
2781     event.Enable( CanCopy() );
2782 }
2783
2784 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2785 {
2786     event.Enable( CanDeleteSelection() );
2787 }
2788
2789 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2790 {
2791     event.Enable( CanPaste() );
2792 }
2793
2794 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2795 {
2796     event.Enable( CanUndo() );
2797     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2798 }
2799
2800 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2801 {
2802     event.Enable( CanRedo() );
2803     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2804 }
2805
2806 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2807 {
2808     SelectAll();
2809 }
2810
2811 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2812 {
2813     event.Enable(GetLastPosition() > 0);
2814 }
2815
2816 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2817 {
2818     if (event.GetEventObject() != this)
2819     {
2820         event.Skip();
2821         return;
2822     }
2823
2824     if (m_contextMenu)
2825         PopupMenu(m_contextMenu);
2826     return;
2827 }
2828
2829 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2830 {
2831     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttr(style));
2832 }
2833
2834 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxTextAttr& style)
2835 {
2836     return GetBuffer().SetStyle(range.ToInternal(), style);
2837 }
2838
2839 // extended style setting operation with flags including:
2840 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2841 // see richtextbuffer.h for more details.
2842
2843 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttr& style, int flags)
2844 {
2845     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2846 }
2847
2848 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2849 {
2850     return GetBuffer().SetDefaultStyle(wxTextAttr(style));
2851 }
2852
2853 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2854 {
2855     return GetBuffer().GetDefaultStyle();
2856 }
2857
2858 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2859 {
2860     return GetBuffer().GetStyle(position, style);
2861 }
2862
2863 // get the common set of styles for the range
2864 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttr& style)
2865 {
2866     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2867 }
2868
2869 /// Get the content (uncombined) attributes for this position.
2870 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2871 {
2872     return GetBuffer().GetUncombinedStyle(position, style);
2873 }
2874
2875 /// Set font, and also the buffer attributes
2876 bool wxRichTextCtrl::SetFont(const wxFont& font)
2877 {
2878     wxTextCtrlBase::SetFont(font);
2879
2880     wxTextAttr attr = GetBuffer().GetAttributes();
2881     attr.SetFont(font);
2882     GetBuffer().SetBasicStyle(attr);
2883
2884     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2885     Refresh(false);
2886
2887     return true;
2888 }
2889
2890 /// Transform logical to physical
2891 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2892 {
2893     wxPoint pt;
2894     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2895
2896     return pt;
2897 }
2898
2899 /// Transform physical to logical
2900 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2901 {
2902     wxPoint pt;
2903     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2904
2905     return pt;
2906 }
2907
2908 /// Position the caret
2909 void wxRichTextCtrl::PositionCaret()
2910 {
2911     if (!GetCaret())
2912         return;
2913
2914     //wxLogDebug(wxT("PositionCaret"));
2915
2916     wxRect caretRect;
2917     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2918     {
2919         wxPoint newPt = caretRect.GetPosition();
2920         wxSize newSz = caretRect.GetSize();
2921         wxPoint pt = GetPhysicalPoint(newPt);
2922         if (GetCaret()->GetPosition() != pt || GetCaret()->GetSize() != newSz)
2923         {
2924             GetCaret()->Hide();
2925             if (GetCaret()->GetSize() != newSz)
2926                 GetCaret()->SetSize(newSz);
2927
2928             int halfSize = newSz.y/2;
2929             // If the caret is beyond the margin, hide it by moving it out of the way
2930             if (((pt.y + halfSize) < GetBuffer().GetTopMargin()) || ((pt.y + halfSize) > (GetClientSize().y - GetBuffer().GetBottomMargin())))
2931                 pt.y = -200;
2932
2933             GetCaret()->Move(pt);
2934             GetCaret()->Show();
2935         }
2936     }
2937 }
2938
2939 /// Get the caret height and position for the given character position
2940 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2941 {
2942     wxClientDC dc(this);
2943     dc.SetFont(GetFont());
2944
2945     PrepareDC(dc);
2946
2947     wxPoint pt;
2948     int height = 0;
2949
2950     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2951     {
2952         // Caret height can't be zero
2953         if (height == 0)
2954             height = dc.GetCharHeight();
2955
2956         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2957         return true;
2958     }
2959
2960     return false;
2961 }
2962
2963 /// Gets the line for the visible caret position. If the caret is
2964 /// shown at the very end of the line, it means the next character is actually
2965 /// on the following line. So let's get the line we're expecting to find
2966 /// if this is the case.
2967 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2968 {
2969     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2970     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2971     if (line)
2972     {
2973         wxRichTextRange lineRange = line->GetAbsoluteRange();
2974         if (caretPosition == lineRange.GetStart()-1 &&
2975             (para->GetRange().GetStart() != lineRange.GetStart()))
2976         {
2977             if (!m_caretAtLineStart)
2978                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2979         }
2980     }
2981     return line;
2982 }
2983
2984
2985 /// Move the caret to the given character position
2986 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2987 {
2988     if (GetBuffer().GetDirty())
2989         LayoutContent();
2990
2991     if (pos <= GetBuffer().GetRange().GetEnd())
2992     {
2993         SetCaretPosition(pos, showAtLineStart);
2994
2995         PositionCaret();
2996
2997         return true;
2998     }
2999     else
3000         return false;
3001 }
3002
3003 /// Layout the buffer: which we must do before certain operations, such as
3004 /// setting the caret position.
3005 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
3006 {
3007     if (GetBuffer().GetDirty() || onlyVisibleRect)
3008     {
3009         wxRect availableSpace(GetClientSize());
3010         if (availableSpace.width == 0)
3011             availableSpace.width = 10;
3012         if (availableSpace.height == 0)
3013             availableSpace.height = 10;
3014
3015         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
3016         if (onlyVisibleRect)
3017         {
3018             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
3019             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
3020         }
3021
3022         wxClientDC dc(this);
3023         dc.SetFont(GetFont());
3024
3025         PrepareDC(dc);
3026
3027         GetBuffer().Defragment();
3028         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
3029         GetBuffer().Layout(dc, availableSpace, flags);
3030         GetBuffer().SetDirty(false);
3031
3032         if (!IsFrozen())
3033             SetupScrollbars();
3034     }
3035
3036     return true;
3037 }
3038
3039 /// Is all of the selection bold?
3040 bool wxRichTextCtrl::IsSelectionBold()
3041 {
3042     if (HasSelection())
3043     {
3044         wxTextAttr attr;
3045         wxRichTextRange range = GetSelectionRange();
3046         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3047         attr.SetFontWeight(wxFONTWEIGHT_BOLD);
3048
3049         return HasCharacterAttributes(range, attr);
3050     }
3051     else
3052     {
3053         // If no selection, then we need to combine current style with default style
3054         // to see what the effect would be if we started typing.
3055         wxTextAttr attr;
3056         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3057
3058         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3059         if (GetStyle(pos, attr))
3060         {
3061             if (IsDefaultStyleShowing())
3062                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3063             return attr.GetFontWeight() == wxFONTWEIGHT_BOLD;
3064         }
3065     }
3066     return false;
3067 }
3068
3069 /// Is all of the selection italics?
3070 bool wxRichTextCtrl::IsSelectionItalics()
3071 {
3072     if (HasSelection())
3073     {
3074         wxRichTextRange range = GetSelectionRange();
3075         wxTextAttr attr;
3076         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3077         attr.SetFontStyle(wxFONTSTYLE_ITALIC);
3078
3079         return HasCharacterAttributes(range, attr);
3080     }
3081     else
3082     {
3083         // If no selection, then we need to combine current style with default style
3084         // to see what the effect would be if we started typing.
3085         wxTextAttr attr;
3086         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3087
3088         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3089         if (GetStyle(pos, attr))
3090         {
3091             if (IsDefaultStyleShowing())
3092                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3093             return attr.GetFontStyle() == wxFONTSTYLE_ITALIC;
3094         }
3095     }
3096     return false;
3097 }
3098
3099 /// Is all of the selection underlined?
3100 bool wxRichTextCtrl::IsSelectionUnderlined()
3101 {
3102     if (HasSelection())
3103     {
3104         wxRichTextRange range = GetSelectionRange();
3105         wxTextAttr attr;
3106         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3107         attr.SetFontUnderlined(true);
3108
3109         return HasCharacterAttributes(range, attr);
3110     }
3111     else
3112     {
3113         // If no selection, then we need to combine current style with default style
3114         // to see what the effect would be if we started typing.
3115         wxTextAttr attr;
3116         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3117         long pos = GetAdjustedCaretPosition(GetCaretPosition());
3118
3119         if (GetStyle(pos, attr))
3120         {
3121             if (IsDefaultStyleShowing())
3122                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
3123             return attr.GetFontUnderlined();
3124         }
3125     }
3126     return false;
3127 }
3128
3129 /// Apply bold to the selection
3130 bool wxRichTextCtrl::ApplyBoldToSelection()
3131 {
3132     wxTextAttr attr;
3133     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
3134     attr.SetFontWeight(IsSelectionBold() ? wxFONTWEIGHT_NORMAL : wxFONTWEIGHT_BOLD);
3135
3136     if (HasSelection())
3137         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3138     else
3139     {
3140         wxRichTextAttr current = GetDefaultStyleEx();
3141         current.Apply(attr);
3142         SetAndShowDefaultStyle(current);
3143     }
3144     return true;
3145 }
3146
3147 /// Apply italic to the selection
3148 bool wxRichTextCtrl::ApplyItalicToSelection()
3149 {
3150     wxTextAttr attr;
3151     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
3152     attr.SetFontStyle(IsSelectionItalics() ? wxFONTSTYLE_NORMAL : wxFONTSTYLE_ITALIC);
3153
3154     if (HasSelection())
3155         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3156     else
3157     {
3158         wxRichTextAttr current = GetDefaultStyleEx();
3159         current.Apply(attr);
3160         SetAndShowDefaultStyle(current);
3161     }
3162     return true;
3163 }
3164
3165 /// Apply underline to the selection
3166 bool wxRichTextCtrl::ApplyUnderlineToSelection()
3167 {
3168     wxTextAttr attr;
3169     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
3170     attr.SetFontUnderlined(!IsSelectionUnderlined());
3171
3172     if (HasSelection())
3173         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
3174     else
3175     {
3176         wxRichTextAttr current = GetDefaultStyleEx();
3177         current.Apply(attr);
3178         SetAndShowDefaultStyle(current);
3179     }
3180     return true;
3181 }
3182
3183 /// Is all of the selection aligned according to the specified flag?
3184 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
3185 {
3186     wxRichTextRange range;
3187     if (HasSelection())
3188         range = GetSelectionRange();
3189     else
3190         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
3191
3192     wxTextAttr attr;
3193     attr.SetAlignment(alignment);
3194
3195     return HasParagraphAttributes(range, attr);
3196 }
3197
3198 /// Apply alignment to the selection
3199 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
3200 {
3201     wxTextAttr attr;
3202     attr.SetAlignment(alignment);
3203     if (HasSelection())
3204         return SetStyle(GetSelectionRange(), attr);
3205     else
3206     {
3207         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
3208         if (para)
3209             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
3210     }
3211     return true;
3212 }
3213
3214 /// Apply a named style to the selection
3215 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
3216 {
3217     // Flags are defined within each definition, so only certain
3218     // attributes are applied.
3219     wxTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
3220
3221     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_RESET;
3222
3223     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
3224     {
3225         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3226
3227         wxRichTextRange range;
3228
3229         if (HasSelection())
3230             range = GetSelectionRange();
3231         else
3232         {
3233             long pos = GetAdjustedCaretPosition(GetCaretPosition());
3234             range = wxRichTextRange(pos, pos+1);
3235         }
3236
3237         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
3238     }
3239
3240     // Make sure the attr has the style name
3241     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
3242     {
3243         attr.SetParagraphStyleName(def->GetName());
3244
3245         // If applying a paragraph style, we only want the paragraph nodes to adopt these
3246         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
3247         // to change its style independently.
3248         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3249     }
3250     else
3251         attr.SetCharacterStyleName(def->GetName());
3252
3253     if (HasSelection())
3254         return SetStyleEx(GetSelectionRange(), attr, flags);
3255     else
3256     {
3257         wxRichTextAttr current = GetDefaultStyleEx();
3258         current.Apply(attr);
3259         SetAndShowDefaultStyle(current);
3260         return true;
3261     }
3262 }
3263
3264 /// Apply the style sheet to the buffer, for example if the styles have changed.
3265 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
3266 {
3267     if (!styleSheet)
3268         styleSheet = GetBuffer().GetStyleSheet();
3269     if (!styleSheet)
3270         return false;
3271
3272     if (GetBuffer().ApplyStyleSheet(styleSheet))
3273     {
3274         GetBuffer().Invalidate(wxRICHTEXT_ALL);
3275         Refresh(false);
3276         return true;
3277     }
3278     else
3279         return false;
3280 }
3281
3282 /// Sets the default style to the style under the cursor
3283 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3284 {
3285     wxTextAttr attr;
3286     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3287
3288     // If at the start of a paragraph, use the next position.
3289     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3290
3291     if (GetUncombinedStyle(pos, attr))
3292     {
3293         SetDefaultStyle(attr);
3294         return true;
3295     }
3296
3297     return false;
3298 }
3299
3300 /// Returns the first visible position in the current view
3301 long wxRichTextCtrl::GetFirstVisiblePosition() const
3302 {
3303     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3304     if (line)
3305         return line->GetAbsoluteRange().GetStart();
3306     else
3307         return 0;
3308 }
3309
3310 /// Get the first visible point in the window
3311 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3312 {
3313     int ppuX, ppuY;
3314     int startXUnits, startYUnits;
3315
3316     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3317     GetViewStart(& startXUnits, & startYUnits);
3318
3319     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3320 }
3321
3322 /// The adjusted caret position is the character position adjusted to take
3323 /// into account whether we're at the start of a paragraph, in which case
3324 /// style information should be taken from the next position, not current one.
3325 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3326 {
3327     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3328
3329     if (para && (caretPos+1 == para->GetRange().GetStart()))
3330         caretPos ++;
3331     return caretPos;
3332 }
3333
3334 /// Get/set the selection range in character positions. -1, -1 means no selection.
3335 /// The range is in API convention, i.e. a single character selection is denoted
3336 /// by (n, n+1)
3337 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3338 {
3339     wxRichTextRange range = GetInternalSelectionRange();
3340     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3341         range.SetEnd(range.GetEnd() + 1);
3342     return range;
3343 }
3344
3345 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3346 {
3347     SetSelection(range.GetStart(), range.GetEnd());
3348 }
3349
3350 /// Set list style
3351 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3352 {
3353     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3354 }
3355
3356 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3357 {
3358     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3359 }
3360
3361 /// Clear list for given range
3362 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3363 {
3364     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3365 }
3366
3367 /// Number/renumber any list elements in the given range
3368 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3369 {
3370     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3371 }
3372
3373 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3374 {
3375     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3376 }
3377
3378 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3379 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3380 {
3381     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3382 }
3383
3384 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3385 {
3386     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3387 }
3388
3389 /// Deletes the content in the given range
3390 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3391 {
3392     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3393 }
3394
3395 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3396 {
3397     if (sm_availableFontNames.GetCount() == 0)
3398     {
3399         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3400         sm_availableFontNames.Sort();
3401     }
3402     return sm_availableFontNames;
3403 }
3404
3405 void wxRichTextCtrl::ClearAvailableFontNames()
3406 {
3407     sm_availableFontNames.Clear();
3408 }
3409
3410 void wxRichTextCtrl::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
3411 {
3412     //wxLogDebug(wxT("wxRichTextCtrl::OnSysColourChanged"));
3413
3414     wxTextAttrEx basicStyle = GetBasicStyle();
3415     basicStyle.SetTextColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
3416     SetBasicStyle(basicStyle);
3417     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
3418
3419     Refresh();
3420 }
3421
3422 // Refresh the area affected by a selection change
3423 bool wxRichTextCtrl::RefreshForSelectionChange(const wxRichTextRange& oldSelection, const wxRichTextRange& newSelection)
3424 {
3425     // Calculate the refresh rectangle - just the affected lines
3426     long firstPos, lastPos;
3427     if (oldSelection.GetStart() == -2 && newSelection.GetStart() != -2)
3428     {
3429         firstPos = newSelection.GetStart();
3430         lastPos = newSelection.GetEnd();
3431     }
3432     else if (oldSelection.GetStart() != -2 && newSelection.GetStart() == -2)
3433     {
3434         firstPos = oldSelection.GetStart();
3435         lastPos = oldSelection.GetEnd();
3436     }
3437     else if (oldSelection.GetStart() == -2 && newSelection.GetStart() == -2)
3438     {
3439         return false;
3440     }
3441     else
3442     {
3443         firstPos = wxMin(oldSelection.GetStart(), newSelection.GetStart());
3444         lastPos = wxMax(oldSelection.GetEnd(), newSelection.GetEnd());
3445     }
3446
3447     wxRichTextLine* firstLine = GetBuffer().GetLineAtPosition(firstPos);
3448     wxRichTextLine* lastLine = GetBuffer().GetLineAtPosition(lastPos);
3449
3450     if (firstLine && lastLine)
3451     {
3452         wxSize clientSize = GetClientSize();
3453         wxPoint pt1 = GetPhysicalPoint(firstLine->GetAbsolutePosition());
3454         wxPoint pt2 = GetPhysicalPoint(lastLine->GetAbsolutePosition()) + wxPoint(0, lastLine->GetSize().y);
3455
3456         pt1.x = 0;
3457         pt1.y = wxMax(0, pt1.y);
3458         pt2.x = 0;
3459         pt2.y = wxMin(clientSize.y, pt2.y);
3460
3461         wxRect rect(pt1, wxSize(clientSize.x, pt2.y - pt1.y));
3462         RefreshRect(rect, false);
3463     }
3464     else
3465         Refresh(false);
3466
3467     return true;
3468 }
3469
3470 #if wxRICHTEXT_USE_OWN_CARET
3471
3472 // ----------------------------------------------------------------------------
3473 // initialization and destruction
3474 // ----------------------------------------------------------------------------
3475
3476 void wxRichTextCaret::Init()
3477 {
3478     m_hasFocus = true;
3479
3480     m_xOld =
3481     m_yOld = -1;
3482     m_richTextCtrl = NULL;
3483     m_needsUpdate = false;
3484     m_flashOn = true;
3485 }
3486
3487 wxRichTextCaret::~wxRichTextCaret()
3488 {
3489     if (m_timer.IsRunning())
3490         m_timer.Stop();
3491 }
3492
3493 // ----------------------------------------------------------------------------
3494 // showing/hiding/moving the caret (base class interface)
3495 // ----------------------------------------------------------------------------
3496
3497 void wxRichTextCaret::DoShow()
3498 {
3499     m_flashOn = true;
3500
3501     if (!m_timer.IsRunning())
3502         m_timer.Start(GetBlinkTime());
3503
3504     Refresh();
3505 }
3506
3507 void wxRichTextCaret::DoHide()
3508 {
3509     if (m_timer.IsRunning())
3510         m_timer.Stop();
3511
3512     Refresh();
3513 }
3514
3515 void wxRichTextCaret::DoMove()
3516 {
3517     if (IsVisible())
3518     {
3519         Refresh();
3520
3521         if (m_xOld != -1 && m_yOld != -1)
3522         {
3523             if (m_richTextCtrl)
3524             {
3525                 wxRect rect(GetPosition(), GetSize());
3526                 m_richTextCtrl->RefreshRect(rect, false);
3527             }
3528         }
3529     }
3530
3531     m_xOld = m_x;
3532     m_yOld = m_y;
3533 }
3534
3535 void wxRichTextCaret::DoSize()
3536 {
3537     int countVisible = m_countVisible;
3538     if (countVisible > 0)
3539     {
3540         m_countVisible = 0;
3541         DoHide();
3542     }
3543
3544     if (countVisible > 0)
3545     {
3546         m_countVisible = countVisible;
3547         DoShow();
3548     }
3549 }
3550
3551 // ----------------------------------------------------------------------------
3552 // handling the focus
3553 // ----------------------------------------------------------------------------
3554
3555 void wxRichTextCaret::OnSetFocus()
3556 {
3557     m_hasFocus = true;
3558
3559     if ( IsVisible() )
3560         Refresh();
3561 }
3562
3563 void wxRichTextCaret::OnKillFocus()
3564 {
3565     m_hasFocus = false;
3566 }
3567
3568 // ----------------------------------------------------------------------------
3569 // drawing the caret
3570 // ----------------------------------------------------------------------------
3571
3572 void wxRichTextCaret::Refresh()
3573 {
3574     if (m_richTextCtrl)
3575     {
3576         wxRect rect(GetPosition(), GetSize());
3577         m_richTextCtrl->RefreshRect(rect, false);
3578     }
3579 }
3580
3581 void wxRichTextCaret::DoDraw(wxDC *dc)
3582 {
3583     dc->SetPen( *wxBLACK_PEN );
3584
3585     dc->SetBrush(*(m_hasFocus ? wxBLACK_BRUSH : wxTRANSPARENT_BRUSH));
3586     dc->SetPen(*wxBLACK_PEN);
3587
3588     wxPoint pt(m_x, m_y);
3589
3590     if (m_richTextCtrl)
3591     {
3592         pt = m_richTextCtrl->GetLogicalPoint(pt);
3593     }
3594     if (IsVisible() && m_flashOn)
3595         dc->DrawRectangle(pt.x, pt.y, m_width, m_height);
3596 }
3597
3598 void wxRichTextCaret::Notify()
3599 {
3600     m_flashOn = !m_flashOn;
3601     Refresh();
3602 }
3603
3604 void wxRichTextCaretTimer::Notify()
3605 {
3606     m_caret->Notify();
3607 }
3608 #endif
3609     // wxRICHTEXT_USE_OWN_CARET
3610
3611 #endif
3612     // wxUSE_RICHTEXT