src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richeditctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/textfile.h"
  30 #include "wx/ffile.h"
  31 #include "wx/filename.h"
  32 #include "wx/dcbuffer.h"
  33 #include "wx/arrimpl.cpp"
  34 #include "wx/fontenum.h"
  35
  36 // DLL options compatibility check:
  37 #include "wx/app.h"
  38 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  39
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_CLICK)
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RETURN)
  45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CHARACTER)
  46 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_DELETE)
  47
  48 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING)
  49 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED)
  50 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING)
  51 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED)
  52
  53 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED)
  54 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED)
  55 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED)
  56 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED)
  57
  58 IMPLEMENT_CLASS( wxRichTextCtrl, wxControl )
  59
  60 IMPLEMENT_CLASS( wxRichTextEvent, wxNotifyEvent )
  61
  62 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
  63     EVT_PAINT(wxRichTextCtrl::OnPaint)
  64     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
  65     EVT_IDLE(wxRichTextCtrl::OnIdle)
  66     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
  67     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
  68     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
  69     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
  70     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
  71     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
  72     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
  73     EVT_CHAR(wxRichTextCtrl::OnChar)
  74     EVT_SIZE(wxRichTextCtrl::OnSize)
  75     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
  76     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
  77     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
  78     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
  79
  80     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
  81     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
  82
  83     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
  84     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
  85
  86     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
  87     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
  88
  89     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
  90     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
  91
  92     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
  93     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
  94
  95     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
  96     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
  97
  98     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
  99     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 100 END_EVENT_TABLE()
 101
 102 /*!
 103  * wxRichTextCtrl
 104  */
 105
 106 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 107
 108 wxRichTextCtrl::wxRichTextCtrl()
 109               : wxScrollHelper(this)
 110 {
 111     Init();
 112 }
 113
 114 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 115                                wxWindowID id,
 116                                const wxString& value,
 117                                const wxPoint& pos,
 118                                const wxSize& size,
 119                                long style,
 120                                const wxValidator& validator,
 121                                const wxString& name)
 122               : wxScrollHelper(this)
 123 {
 124     Init();
 125     Create(parent, id, value, pos, size, style, validator, name);
 126 }
 127
 128 /// Creation
 129 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 130                              const wxValidator& validator, const wxString& name)
 131 {
 132     if (!wxTextCtrlBase::Create(parent, id, pos, size,
 133                                 style|wxFULL_REPAINT_ON_RESIZE,
 134                                 validator, name))
 135         return false;
 136
 137     if (!GetFont().Ok())
 138     {
 139         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 140     }
 141
 142     GetBuffer().Reset();
 143     GetBuffer().SetRichTextCtrl(this);
 144
 145     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 146     GetCaret()->Show();
 147
 148     if (style & wxTE_READONLY)
 149         SetEditable(false);
 150
 151     // The base attributes must all have default values
 152     wxTextAttrEx attributes;
 153     attributes.SetFont(GetFont());
 154     attributes.SetTextColour(*wxBLACK);
 155     attributes.SetBackgroundColour(*wxWHITE);
 156     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 157     attributes.SetLineSpacing(10);
 158     attributes.SetParagraphSpacingAfter(10);
 159     attributes.SetParagraphSpacingBefore(0);
 160     attributes.SetTextEffects(0);
 161     attributes.SetTextEffectFlags(wxTEXT_ATTR_EFFECT_STRIKETHROUGH|wxTEXT_ATTR_EFFECT_CAPITALS);
 162
 163     SetBasicStyle(attributes);
 164
 165     // The default attributes will be merged with base attributes, so
 166     // can be empty to begin with
 167     wxTextAttrEx defaultAttributes;
 168     SetDefaultStyle(defaultAttributes);
 169
 170     SetBackgroundColour(*wxWHITE);
 171     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 172
 173     // Tell the sizers to use the given or best size
 174     SetInitialSize(size);
 175
 176 #if wxRICHTEXT_BUFFERED_PAINTING
 177     // Create a buffer
 178     RecreateBuffer(size);
 179 #endif
 180
 181     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 182     m_urlCursor = wxCursor(wxCURSOR_HAND);
 183
 184     SetCursor(m_textCursor);
 185
 186     if (!value.IsEmpty())
 187         SetValue(value);
 188
 189     GetBuffer().AddEventHandler(this);
 190
 191     return true;
 192 }
 193
 194 wxRichTextCtrl::~wxRichTextCtrl()
 195 {
 196     GetBuffer().RemoveEventHandler(this);
 197
 198     delete m_contextMenu;
 199 }
 200
 201 /// Member initialisation
 202 void wxRichTextCtrl::Init()
 203 {
 204     m_freezeCount = 0;
 205     m_contextMenu = NULL;
 206     m_caret = NULL;
 207     m_caretPosition = -1;
 208     m_selectionRange.SetRange(-2, -2);
 209     m_selectionAnchor = -2;
 210     m_editable = true;
 211     m_caretAtLineStart = false;
 212     m_dragging = false;
 213     m_fullLayoutRequired = false;
 214     m_fullLayoutTime = 0;
 215     m_fullLayoutSavedPosition = 0;
 216     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 217     m_caretPositionForDefaultStyle = -2;
 218 }
 219
 220 /// Call Freeze to prevent refresh
 221 void wxRichTextCtrl::Freeze()
 222 {
 223     m_freezeCount ++;
 224 }
 225
 226 /// Call Thaw to refresh
 227 void wxRichTextCtrl::Thaw()
 228 {
 229     m_freezeCount --;
 230
 231     if (m_freezeCount == 0)
 232     {
 233         SetupScrollbars();
 234         Refresh(false);
 235     }
 236 }
 237
 238 /// Clear all text
 239 void wxRichTextCtrl::Clear()
 240 {
 241     m_buffer.ResetAndClearCommands();
 242     m_buffer.SetDirty(true);
 243     m_caretPosition = -1;
 244     m_caretPositionForDefaultStyle = -2;
 245     m_caretAtLineStart = false;
 246     m_selectionRange.SetRange(-2, -2);
 247
 248     SetScrollbars(0, 0, 0, 0, 0, 0);
 249
 250     if (m_freezeCount == 0)
 251     {
 252         SetupScrollbars();
 253         Refresh(false);
 254     }
 255     SendTextUpdatedEvent();
 256 }
 257
 258 /// Painting
 259 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 260 {
 261     if (GetCaret() && GetCaret()->IsVisible())
 262         GetCaret()->Hide();
 263
 264     {
 265 #if wxRICHTEXT_BUFFERED_PAINTING
 266         wxBufferedPaintDC dc(this, m_bufferBitmap);
 267 #else
 268         wxPaintDC dc(this);
 269 #endif
 270         PrepareDC(dc);
 271
 272         if (m_freezeCount > 0)
 273             return;
 274
 275         dc.SetFont(GetFont());
 276
 277         // Paint the background
 278         PaintBackground(dc);
 279
 280         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 281
 282         wxRect drawingArea(GetUpdateRegion().GetBox());
 283         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 284
 285         wxRect availableSpace(GetClientSize());
 286         if (GetBuffer().GetDirty())
 287         {
 288             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 289             GetBuffer().SetDirty(false);
 290             SetupScrollbars();
 291         }
 292
 293         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 294     }
 295
 296     if (GetCaret() && !GetCaret()->IsVisible())
 297         GetCaret()->Show();
 298
 299     PositionCaret();
 300 }
 301
 302 // Empty implementation, to prevent flicker
 303 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 304 {
 305 }
 306
 307 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 308 {
 309     if (GetCaret())
 310     {
 311         if (!GetCaret()->IsVisible())
 312             GetCaret()->Show();
 313         PositionCaret();
 314     }
 315
 316     // if (!IsFrozen())
 317     //    Refresh(false);
 318 }
 319
 320 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 321 {
 322     if (GetCaret() && GetCaret()->IsVisible())
 323         GetCaret()->Hide();
 324
 325     // if (!IsFrozen())
 326     //    Refresh(false);
 327 }
 328
 329 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 330 {
 331     m_dragging = false;
 332 }
 333
 334 /// Left-click
 335 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 336 {
 337     SetFocus();
 338
 339     wxClientDC dc(this);
 340     PrepareDC(dc);
 341     dc.SetFont(GetFont());
 342
 343     long position = 0;
 344     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 345
 346     if (hit != wxRICHTEXT_HITTEST_NONE)
 347     {
 348         m_dragStart = event.GetLogicalPosition(dc);
 349         m_dragging = true;
 350         CaptureMouse();
 351
 352         SelectNone();
 353
 354         bool caretAtLineStart = false;
 355
 356         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 357         {
 358             // If we're at the start of a line (but not first in para)
 359             // then we should keep the caret showing at the start of the line
 360             // by showing the m_caretAtLineStart flag.
 361             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 362             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 363
 364             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 365                 caretAtLineStart = true;
 366             position --;
 367         }
 368
 369         MoveCaret(position, caretAtLineStart);
 370         SetDefaultStyleToCursorStyle();
 371     }
 372
 373     event.Skip();
 374 }
 375
 376 /// Left-up
 377 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 378 {
 379     if (m_dragging)
 380     {
 381         m_dragging = false;
 382         if (GetCapture() == this)
 383             ReleaseMouse();
 384
 385         // See if we clicked on a URL
 386         wxClientDC dc(this);
 387         PrepareDC(dc);
 388         dc.SetFont(GetFont());
 389
 390         long position = 0;
 391         wxPoint logicalPt = event.GetLogicalPosition(dc);
 392         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 393
 394         if (hit != wxRICHTEXT_HITTEST_NONE)
 395         {
 396             wxTextAttrEx attr;
 397             if (GetStyle(position, attr))
 398             {
 399                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 400                 {
 401                     wxString urlTarget = attr.GetURL();
 402                     if (!urlTarget.IsEmpty())
 403                     {
 404                         wxMouseEvent mouseEvent(event);
 405
 406                         long startPos = 0, endPos = 0;
 407                         wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 408                         if (obj)
 409                         {
 410                             startPos = obj->GetRange().GetStart();
 411                             endPos = obj->GetRange().GetEnd();
 412                         }
 413
 414                         wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 415                         InitCommandEvent(urlEvent);
 416
 417                         urlEvent.SetString(urlTarget);
 418
 419                         GetEventHandler()->ProcessEvent(urlEvent);
 420                     }
 421                 }
 422             }
 423         }
 424     }
 425 }
 426
 427 /// Left-click
 428 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 429 {
 430     wxClientDC dc(this);
 431     PrepareDC(dc);
 432     dc.SetFont(GetFont());
 433
 434     long position = 0;
 435     wxPoint logicalPt = event.GetLogicalPosition(dc);
 436     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 437
 438     // See if we need to change the cursor
 439
 440     {
 441         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 442         {
 443             wxTextAttrEx attr;
 444             if (GetStyle(position, attr))
 445             {
 446                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 447                 {
 448                     SetCursor(m_urlCursor);
 449                 }
 450                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 451                 {
 452                     SetCursor(m_textCursor);
 453                 }
 454             }
 455         }
 456         else
 457             SetCursor(m_textCursor);
 458     }
 459
 460     if (!event.Dragging())
 461     {
 462         event.Skip();
 463         return;
 464     }
 465
 466     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 467     {
 468         // TODO: test closeness
 469
 470         bool caretAtLineStart = false;
 471
 472         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 473         {
 474             // If we're at the start of a line (but not first in para)
 475             // then we should keep the caret showing at the start of the line
 476             // by showing the m_caretAtLineStart flag.
 477             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 478             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 479
 480             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 481                 caretAtLineStart = true;
 482             position --;
 483         }
 484
 485         if (m_caretPosition != position)
 486         {
 487             bool extendSel = ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 488
 489             MoveCaret(position, caretAtLineStart);
 490             SetDefaultStyleToCursorStyle();
 491
 492             if (extendSel)
 493                 Refresh(false);
 494         }
 495     }
 496 }
 497
 498 /// Right-click
 499 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 500 {
 501     SetFocus();
 502     event.Skip();
 503 }
 504
 505 /// Left-double-click
 506 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& event)
 507 {
 508     SelectWord(GetCaretPosition()+1);
 509     event.Skip();
 510 }
 511
 512 /// Middle-click
 513 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 514 {
 515     event.Skip();
 516 }
 517
 518 /// Key press
 519 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 520 {
 521     int flags = 0;
 522     if (event.CmdDown())
 523         flags |= wxRICHTEXT_CTRL_DOWN;
 524     if (event.ShiftDown())
 525         flags |= wxRICHTEXT_SHIFT_DOWN;
 526     if (event.AltDown())
 527         flags |= wxRICHTEXT_ALT_DOWN;
 528
 529     if (event.GetKeyCode() == WXK_LEFT ||
 530         event.GetKeyCode() == WXK_RIGHT ||
 531         event.GetKeyCode() == WXK_UP ||
 532         event.GetKeyCode() == WXK_DOWN ||
 533         event.GetKeyCode() == WXK_HOME ||
 534         event.GetKeyCode() == WXK_PAGEUP ||
 535         event.GetKeyCode() == WXK_PAGEDOWN ||
 536         event.GetKeyCode() == WXK_END ||
 537
 538         event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 539         event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 540         event.GetKeyCode() == WXK_NUMPAD_UP ||
 541         event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 542         event.GetKeyCode() == WXK_NUMPAD_HOME ||
 543         event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 544         event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 545         event.GetKeyCode() == WXK_NUMPAD_END)
 546     {
 547         KeyboardNavigate(event.GetKeyCode(), flags);
 548         return;
 549     }
 550
 551     // all the other keys modify the controls contents which shouldn't be
 552     // possible if we're read-only
 553     if ( !IsEditable() )
 554     {
 555         event.Skip();
 556         return;
 557     }
 558
 559     if (event.GetKeyCode() == WXK_RETURN)
 560     {
 561         BeginBatchUndo(_("Insert Text"));
 562
 563         long newPos = m_caretPosition;
 564
 565         DeleteSelectedContent(& newPos);
 566
 567         if (event.ShiftDown())
 568         {
 569             wxString text;
 570             text = wxRichTextLineBreakChar;
 571             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 572         }
 573         else
 574             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
 575
 576         EndBatchUndo();
 577         SetDefaultStyleToCursorStyle();
 578
 579         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 580
 581         wxRichTextEvent cmdEvent(
 582             wxEVT_COMMAND_RICHTEXT_RETURN,
 583             GetId());
 584         cmdEvent.SetEventObject(this);
 585         cmdEvent.SetFlags(flags);
 586         cmdEvent.SetPosition(newPos+1);
 587
 588         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 589         {
 590             // Generate conventional event
 591             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 592             InitCommandEvent(textEvent);
 593
 594             GetEventHandler()->ProcessEvent(textEvent);
 595         }
 596         Update();
 597     }
 598     else if (event.GetKeyCode() == WXK_BACK)
 599     {
 600         BeginBatchUndo(_("Delete Text"));
 601
 602         // Submit range in character positions, which are greater than caret positions,
 603         // so subtract 1 for deleted character and add 1 for conversion to character position.
 604         if (m_caretPosition > -1 && !HasSelection())
 605         {
 606             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition, m_caretPosition), this);
 607         }
 608         else
 609             DeleteSelectedContent();
 610
 611         EndBatchUndo();
 612
 613         if (GetLastPosition() == -1)
 614         {
 615             GetBuffer().Reset();
 616
 617             m_caretPosition = -1;
 618             PositionCaret();
 619             SetDefaultStyleToCursorStyle();
 620         }
 621
 622         ScrollIntoView(m_caretPosition, WXK_LEFT);
 623
 624         wxRichTextEvent cmdEvent(
 625             wxEVT_COMMAND_RICHTEXT_DELETE,
 626             GetId());
 627         cmdEvent.SetEventObject(this);
 628         cmdEvent.SetFlags(flags);
 629         cmdEvent.SetPosition(m_caretPosition+1);
 630         GetEventHandler()->ProcessEvent(cmdEvent);
 631
 632         Update();
 633     }
 634     else if (event.GetKeyCode() == WXK_DELETE)
 635     {
 636         BeginBatchUndo(_("Delete Text"));
 637
 638         // Submit range in character positions, which are greater than caret positions,
 639         if (m_caretPosition < GetBuffer().GetRange().GetEnd()+1 && !HasSelection())
 640         {
 641             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition+1, m_caretPosition+1), this);
 642         }
 643         else
 644             DeleteSelectedContent();
 645
 646         EndBatchUndo();
 647
 648         if (GetLastPosition() == -1)
 649         {
 650             GetBuffer().Reset();
 651
 652             m_caretPosition = -1;
 653             PositionCaret();
 654             SetDefaultStyleToCursorStyle();
 655         }
 656
 657         wxRichTextEvent cmdEvent(
 658             wxEVT_COMMAND_RICHTEXT_DELETE,
 659             GetId());
 660         cmdEvent.SetEventObject(this);
 661         cmdEvent.SetFlags(flags);
 662         cmdEvent.SetPosition(m_caretPosition+1);
 663         GetEventHandler()->ProcessEvent(cmdEvent);
 664
 665         Update();
 666     }
 667     else
 668     {
 669         long keycode = event.GetKeyCode();
 670         switch ( keycode )
 671         {
 672             case WXK_ESCAPE:
 673             case WXK_DELETE:
 674             case WXK_START:
 675             case WXK_LBUTTON:
 676             case WXK_RBUTTON:
 677             case WXK_CANCEL:
 678             case WXK_MBUTTON:
 679             case WXK_CLEAR:
 680             case WXK_SHIFT:
 681             case WXK_ALT:
 682             case WXK_CONTROL:
 683             case WXK_MENU:
 684             case WXK_PAUSE:
 685             case WXK_CAPITAL:
 686             case WXK_END:
 687             case WXK_HOME:
 688             case WXK_LEFT:
 689             case WXK_UP:
 690             case WXK_RIGHT:
 691             case WXK_DOWN:
 692             case WXK_SELECT:
 693             case WXK_PRINT:
 694             case WXK_EXECUTE:
 695             case WXK_SNAPSHOT:
 696             case WXK_INSERT:
 697             case WXK_HELP:
 698             case WXK_NUMPAD0:
 699             case WXK_NUMPAD1:
 700             case WXK_NUMPAD2:
 701             case WXK_NUMPAD3:
 702             case WXK_NUMPAD4:
 703             case WXK_NUMPAD5:
 704             case WXK_NUMPAD6:
 705             case WXK_NUMPAD7:
 706             case WXK_NUMPAD8:
 707             case WXK_NUMPAD9:
 708             case WXK_MULTIPLY:
 709             case WXK_ADD:
 710             case WXK_SEPARATOR:
 711             case WXK_SUBTRACT:
 712             case WXK_DECIMAL:
 713             case WXK_DIVIDE:
 714             case WXK_F1:
 715             case WXK_F2:
 716             case WXK_F3:
 717             case WXK_F4:
 718             case WXK_F5:
 719             case WXK_F6:
 720             case WXK_F7:
 721             case WXK_F8:
 722             case WXK_F9:
 723             case WXK_F10:
 724             case WXK_F11:
 725             case WXK_F12:
 726             case WXK_F13:
 727             case WXK_F14:
 728             case WXK_F15:
 729             case WXK_F16:
 730             case WXK_F17:
 731             case WXK_F18:
 732             case WXK_F19:
 733             case WXK_F20:
 734             case WXK_F21:
 735             case WXK_F22:
 736             case WXK_F23:
 737             case WXK_F24:
 738             case WXK_NUMLOCK:
 739             case WXK_SCROLL:
 740             case WXK_PAGEUP:
 741             case WXK_PAGEDOWN:
 742             case WXK_NUMPAD_SPACE:
 743             case WXK_NUMPAD_TAB:
 744             case WXK_NUMPAD_ENTER:
 745             case WXK_NUMPAD_F1:
 746             case WXK_NUMPAD_F2:
 747             case WXK_NUMPAD_F3:
 748             case WXK_NUMPAD_F4:
 749             case WXK_NUMPAD_HOME:
 750             case WXK_NUMPAD_LEFT:
 751             case WXK_NUMPAD_UP:
 752             case WXK_NUMPAD_RIGHT:
 753             case WXK_NUMPAD_DOWN:
 754             case WXK_NUMPAD_PAGEUP:
 755             case WXK_NUMPAD_PAGEDOWN:
 756             case WXK_NUMPAD_END:
 757             case WXK_NUMPAD_BEGIN:
 758             case WXK_NUMPAD_INSERT:
 759             case WXK_NUMPAD_DELETE:
 760             case WXK_NUMPAD_EQUAL:
 761             case WXK_NUMPAD_MULTIPLY:
 762             case WXK_NUMPAD_ADD:
 763             case WXK_NUMPAD_SEPARATOR:
 764             case WXK_NUMPAD_SUBTRACT:
 765             case WXK_NUMPAD_DECIMAL:
 766             case WXK_WINDOWS_LEFT:
 767             {
 768                 event.Skip();
 769                 return;
 770             }
 771
 772             default:
 773             {
 774                 if (event.CmdDown() || event.AltDown())
 775                 {
 776                     event.Skip();
 777                     return;
 778                 }
 779
 780                 wxRichTextEvent cmdEvent(
 781                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
 782                     GetId());
 783                 cmdEvent.SetEventObject(this);
 784                 cmdEvent.SetFlags(flags);
 785                 cmdEvent.SetCharacter((wxChar) keycode);
 786                 cmdEvent.SetPosition(m_caretPosition+1);
 787
 788                 if (keycode == wxT('\t'))
 789                 {
 790                     // See if we need to promote or demote the selection or paragraph at the cursor
 791                     // position, instead of inserting a tab.
 792                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
 793                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
 794                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
 795                     {
 796                         wxRichTextRange range;
 797                         if (HasSelection())
 798                             range = GetSelectionRange();
 799                         else
 800                             range = para->GetRange().FromInternal();
 801
 802                         int promoteBy = event.ShiftDown() ? 1 : -1;
 803
 804                         PromoteList(promoteBy, range, NULL);
 805
 806                         GetEventHandler()->ProcessEvent(cmdEvent);
 807
 808                         return;
 809                     }
 810                 }
 811
 812                 BeginBatchUndo(_("Insert Text"));
 813
 814                 long newPos = m_caretPosition;
 815                 DeleteSelectedContent(& newPos);
 816
 817                 wxString str = (wxChar) event.GetKeyCode();
 818                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
 819
 820                 EndBatchUndo();
 821
 822                 SetDefaultStyleToCursorStyle();
 823                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
 824
 825                 GetEventHandler()->ProcessEvent(cmdEvent);
 826
 827                 Update();
 828             }
 829         }
 830     }
 831 }
 832
 833 /// Delete content if there is a selection, e.g. when pressing a key.
 834 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
 835 {
 836     if (HasSelection())
 837     {
 838         long pos = m_selectionRange.GetStart();
 839         GetBuffer().DeleteRangeWithUndo(m_selectionRange, this);
 840         m_selectionRange.SetRange(-2, -2);
 841
 842         if (newPos)
 843             *newPos = pos-1;
 844         return true;
 845     }
 846     else
 847         return false;
 848 }
 849
 850 /// Keyboard navigation
 851
 852 /*
 853
 854 Left:       left one character
 855 Right:      right one character
 856 Up:         up one line
 857 Down:       down one line
 858 Ctrl-Left:  left one word
 859 Ctrl-Right: right one word
 860 Ctrl-Up:    previous paragraph start
 861 Ctrl-Down:  next start of paragraph
 862 Home:       start of line
 863 End:        end of line
 864 Ctrl-Home:  start of document
 865 Ctrl-End:   end of document
 866 Page-Up:    Up a screen
 867 Page-Down:  Down a screen
 868
 869 Maybe:
 870
 871 Ctrl-Alt-PgUp: Start of window
 872 Ctrl-Alt-PgDn: End of window
 873 F8:         Start selection mode
 874 Esc:        End selection mode
 875
 876 Adding Shift does the above but starts/extends selection.
 877
 878
 879  */
 880
 881 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
 882 {
 883     bool success = false;
 884
 885     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
 886     {
 887         if (flags & wxRICHTEXT_CTRL_DOWN)
 888             success = WordRight(1, flags);
 889         else
 890             success = MoveRight(1, flags);
 891     }
 892     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
 893     {
 894         if (flags & wxRICHTEXT_CTRL_DOWN)
 895             success = WordLeft(1, flags);
 896         else
 897             success = MoveLeft(1, flags);
 898     }
 899     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
 900     {
 901         if (flags & wxRICHTEXT_CTRL_DOWN)
 902             success = MoveToParagraphStart(flags);
 903         else
 904             success = MoveUp(1, flags);
 905     }
 906     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
 907     {
 908         if (flags & wxRICHTEXT_CTRL_DOWN)
 909             success = MoveToParagraphEnd(flags);
 910         else
 911             success = MoveDown(1, flags);
 912     }
 913     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
 914     {
 915         success = PageUp(1, flags);
 916     }
 917     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
 918     {
 919         success = PageDown(1, flags);
 920     }
 921     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
 922     {
 923         if (flags & wxRICHTEXT_CTRL_DOWN)
 924             success = MoveHome(flags);
 925         else
 926             success = MoveToLineStart(flags);
 927     }
 928     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
 929     {
 930         if (flags & wxRICHTEXT_CTRL_DOWN)
 931             success = MoveEnd(flags);
 932         else
 933             success = MoveToLineEnd(flags);
 934     }
 935
 936     if (success)
 937     {
 938         ScrollIntoView(m_caretPosition, keyCode);
 939         SetDefaultStyleToCursorStyle();
 940     }
 941
 942     return success;
 943 }
 944
 945 /// Extend the selection. Selections are in caret positions.
 946 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
 947 {
 948     if (flags & wxRICHTEXT_SHIFT_DOWN)
 949     {
 950         // If not currently selecting, start selecting
 951         if (m_selectionRange.GetStart() == -2)
 952         {
 953             m_selectionAnchor = oldPos;
 954
 955             if (oldPos > newPos)
 956                 m_selectionRange.SetRange(newPos+1, oldPos);
 957             else
 958                 m_selectionRange.SetRange(oldPos+1, newPos);
 959         }
 960         else
 961         {
 962             // Always ensure that the selection range start is greater than
 963             // the end.
 964             if (newPos > m_selectionAnchor)
 965                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
 966             else
 967                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
 968         }
 969
 970         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
 971         {
 972             wxLogDebug(wxT("Strange selection range"));
 973         }
 974
 975         return true;
 976     }
 977     else
 978         return false;
 979 }
 980
 981 /// Scroll into view, returning true if we scrolled.
 982 /// This takes a _caret_ position.
 983 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
 984 {
 985     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
 986
 987     if (!line)
 988         return false;
 989
 990     int ppuX, ppuY;
 991     GetScrollPixelsPerUnit(& ppuX, & ppuY);
 992
 993     int startXUnits, startYUnits;
 994     GetViewStart(& startXUnits, & startYUnits);
 995     int startY = startYUnits * ppuY;
 996
 997     int sx = 0, sy = 0;
 998     GetVirtualSize(& sx, & sy);
 999     int sxUnits = 0;
1000     int syUnits = 0;
1001     if (ppuY != 0)
1002         syUnits = sy/ppuY;
1003
1004     wxRect rect = line->GetRect();
1005
1006     bool scrolled = false;
1007
1008     wxSize clientSize = GetClientSize();
1009
1010     // Going down
1011     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1012         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_DOWN ||
1013         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1014         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1015     {
1016         if ((rect.y + rect.height) > (clientSize.y + startY))
1017         {
1018             // Make it scroll so this item is at the bottom
1019             // of the window
1020             int y = rect.y - (clientSize.y - rect.height);
1021             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1022
1023             // If we're still off the screen, scroll another line down
1024             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1025                 yUnits ++;
1026
1027             if (startYUnits != yUnits)
1028             {
1029                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1030                 scrolled = true;
1031             }
1032         }
1033         else if (rect.y < startY)
1034         {
1035             // Make it scroll so this item is at the top
1036             // of the window
1037             int y = rect.y ;
1038             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1039
1040             if (startYUnits != yUnits)
1041             {
1042                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1043                 scrolled = true;
1044             }
1045         }
1046     }
1047     // Going up
1048     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1049              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1050              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1051              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1052     {
1053         if (rect.y < startY)
1054         {
1055             // Make it scroll so this item is at the top
1056             // of the window
1057             int y = rect.y ;
1058             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1059
1060             if (startYUnits != yUnits)
1061             {
1062                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1063                 scrolled = true;
1064             }
1065         }
1066         else if ((rect.y + rect.height) > (clientSize.y + startY))
1067         {
1068             // Make it scroll so this item is at the bottom
1069             // of the window
1070             int y = rect.y - (clientSize.y - rect.height);
1071             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1072
1073             // If we're still off the screen, scroll another line down
1074             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1075                 yUnits ++;
1076
1077             if (startYUnits != yUnits)
1078             {
1079                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1080                 scrolled = true;
1081             }
1082         }
1083     }
1084     PositionCaret();
1085
1086     return scrolled;
1087 }
1088
1089 /// Is the given position visible on the screen?
1090 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1091 {
1092     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1093
1094     if (!line)
1095         return false;
1096
1097     int ppuX, ppuY;
1098     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1099
1100     int startX, startY;
1101     GetViewStart(& startX, & startY);
1102     startX = 0;
1103     startY = startY * ppuY;
1104
1105     int sx = 0, sy = 0;
1106     GetVirtualSize(& sx, & sy);
1107     sx = 0;
1108     if (ppuY != 0)
1109         sy = sy/ppuY;
1110
1111     wxRect rect = line->GetRect();
1112
1113     wxSize clientSize = GetClientSize();
1114
1115     return !(((rect.y + rect.height) > (clientSize.y + startY)) || rect.y < startY);
1116 }
1117
1118 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1119 {
1120     m_caretPosition = position;
1121     m_caretAtLineStart = showAtLineStart;
1122 }
1123
1124 /// Move caret one visual step forward: this may mean setting a flag
1125 /// and keeping the same position if we're going from the end of one line
1126 /// to the start of the next, which may be the exact same caret position.
1127 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1128 {
1129     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1130
1131     // Only do the check if we're not at the end of the paragraph (where things work OK
1132     // anyway)
1133     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1134     {
1135         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1136
1137         if (line)
1138         {
1139             wxRichTextRange lineRange = line->GetAbsoluteRange();
1140
1141             // We're at the end of a line. See whether we need to
1142             // stay at the same actual caret position but change visual
1143             // position, or not.
1144             if (oldPosition == lineRange.GetEnd())
1145             {
1146                 if (m_caretAtLineStart)
1147                 {
1148                     // We're already at the start of the line, so actually move on now.
1149                     m_caretPosition = oldPosition + 1;
1150                     m_caretAtLineStart = false;
1151                 }
1152                 else
1153                 {
1154                     // We're showing at the end of the line, so keep to
1155                     // the same position but indicate that we're to show
1156                     // at the start of the next line.
1157                     m_caretPosition = oldPosition;
1158                     m_caretAtLineStart = true;
1159                 }
1160                 SetDefaultStyleToCursorStyle();
1161                 return;
1162             }
1163         }
1164     }
1165     m_caretPosition ++;
1166     SetDefaultStyleToCursorStyle();
1167 }
1168
1169 /// Move caret one visual step backward: this may mean setting a flag
1170 /// and keeping the same position if we're going from the end of one line
1171 /// to the start of the next, which may be the exact same caret position.
1172 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1173 {
1174     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1175
1176     // Only do the check if we're not at the start of the paragraph (where things work OK
1177     // anyway)
1178     if (para && (oldPosition != para->GetRange().GetStart()))
1179     {
1180         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1181
1182         if (line)
1183         {
1184             wxRichTextRange lineRange = line->GetAbsoluteRange();
1185
1186             // We're at the start of a line. See whether we need to
1187             // stay at the same actual caret position but change visual
1188             // position, or not.
1189             if (oldPosition == lineRange.GetStart())
1190             {
1191                 m_caretPosition = oldPosition-1;
1192                 m_caretAtLineStart = true;
1193                 return;
1194             }
1195             else if (oldPosition == lineRange.GetEnd())
1196             {
1197                 if (m_caretAtLineStart)
1198                 {
1199                     // We're at the start of the line, so keep the same caret position
1200                     // but clear the start-of-line flag.
1201                     m_caretPosition = oldPosition;
1202                     m_caretAtLineStart = false;
1203                 }
1204                 else
1205                 {
1206                     // We're showing at the end of the line, so go back
1207                     // to the previous character position.
1208                     m_caretPosition = oldPosition - 1;
1209                 }
1210                 SetDefaultStyleToCursorStyle();
1211                 return;
1212             }
1213         }
1214     }
1215     m_caretPosition --;
1216     SetDefaultStyleToCursorStyle();
1217 }
1218
1219 /// Move right
1220 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1221 {
1222     long endPos = GetBuffer().GetRange().GetEnd();
1223
1224     if (m_caretPosition + noPositions < endPos)
1225     {
1226         long oldPos = m_caretPosition;
1227         long newPos = m_caretPosition + noPositions;
1228
1229         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1230         if (!extendSel)
1231             SelectNone();
1232
1233         // Determine by looking at oldPos and m_caretPosition whether
1234         // we moved from the end of a line to the start of the next line, in which case
1235         // we want to adjust the caret position such that it is positioned at the
1236         // start of the next line, rather than jumping past the first character of the
1237         // line.
1238         if (noPositions == 1 && !extendSel)
1239             MoveCaretForward(oldPos);
1240         else
1241             SetCaretPosition(newPos);
1242
1243         PositionCaret();
1244         SetDefaultStyleToCursorStyle();
1245
1246         if (extendSel)
1247             Refresh(false);
1248         return true;
1249     }
1250     else
1251         return false;
1252 }
1253
1254 /// Move left
1255 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1256 {
1257     long startPos = -1;
1258
1259     if (m_caretPosition > startPos - noPositions + 1)
1260     {
1261         long oldPos = m_caretPosition;
1262         long newPos = m_caretPosition - noPositions;
1263         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1264         if (!extendSel)
1265             SelectNone();
1266
1267         if (noPositions == 1 && !extendSel)
1268             MoveCaretBack(oldPos);
1269         else
1270             SetCaretPosition(newPos);
1271
1272         PositionCaret();
1273         SetDefaultStyleToCursorStyle();
1274
1275         if (extendSel)
1276             Refresh(false);
1277         return true;
1278     }
1279     else
1280         return false;
1281 }
1282
1283 /// Move up
1284 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1285 {
1286     return MoveDown(- noLines, flags);
1287 }
1288
1289 /// Move up
1290 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1291 {
1292     if (!GetCaret())
1293         return false;
1294
1295     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1296     wxPoint pt = GetCaret()->GetPosition();
1297     long newLine = lineNumber + noLines;
1298
1299     if (lineNumber != -1)
1300     {
1301         if (noLines > 0)
1302         {
1303             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1304
1305             if (newLine > lastLine)
1306                 return false;
1307         }
1308         else
1309         {
1310             if (newLine < 0)
1311                 return false;
1312         }
1313     }
1314
1315     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1316     if (lineObj)
1317     {
1318         pt.y = lineObj->GetAbsolutePosition().y + 2;
1319     }
1320     else
1321         return false;
1322
1323     long newPos = 0;
1324     wxClientDC dc(this);
1325     PrepareDC(dc);
1326     dc.SetFont(GetFont());
1327
1328     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1329
1330     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1331     {
1332         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1333         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1334         // so we view the caret at the start of the line.
1335         bool caretLineStart = false;
1336         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1337         {
1338             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1339             wxRichTextRange lineRange;
1340             if (thisLine)
1341                 lineRange = thisLine->GetAbsoluteRange();
1342
1343             if (thisLine && (newPos-1) == lineRange.GetEnd())
1344             {
1345                 newPos --;
1346                 caretLineStart = true;
1347             }
1348             else
1349             {
1350                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1351                 if (para && para->GetRange().GetStart() == newPos)
1352                     newPos --;
1353             }
1354         }
1355
1356         long newSelEnd = newPos;
1357
1358         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1359         if (!extendSel)
1360             SelectNone();
1361
1362         SetCaretPosition(newPos, caretLineStart);
1363         PositionCaret();
1364         SetDefaultStyleToCursorStyle();
1365
1366         if (extendSel)
1367             Refresh(false);
1368         return true;
1369     }
1370
1371     return false;
1372 }
1373
1374 /// Move to the end of the paragraph
1375 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1376 {
1377     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1378     if (para)
1379     {
1380         long newPos = para->GetRange().GetEnd() - 1;
1381         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1382         if (!extendSel)
1383             SelectNone();
1384
1385         SetCaretPosition(newPos);
1386         PositionCaret();
1387         SetDefaultStyleToCursorStyle();
1388
1389         if (extendSel)
1390             Refresh(false);
1391         return true;
1392     }
1393
1394     return false;
1395 }
1396
1397 /// Move to the start of the paragraph
1398 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1399 {
1400     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1401     if (para)
1402     {
1403         long newPos = para->GetRange().GetStart() - 1;
1404         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1405         if (!extendSel)
1406             SelectNone();
1407
1408         SetCaretPosition(newPos);
1409         PositionCaret();
1410         SetDefaultStyleToCursorStyle();
1411
1412         if (extendSel)
1413             Refresh(false);
1414         return true;
1415     }
1416
1417     return false;
1418 }
1419
1420 /// Move to the end of the line
1421 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1422 {
1423     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1424
1425     if (line)
1426     {
1427         wxRichTextRange lineRange = line->GetAbsoluteRange();
1428         long newPos = lineRange.GetEnd();
1429         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1430         if (!extendSel)
1431             SelectNone();
1432
1433         SetCaretPosition(newPos);
1434         PositionCaret();
1435         SetDefaultStyleToCursorStyle();
1436
1437         if (extendSel)
1438             Refresh(false);
1439         return true;
1440     }
1441
1442     return false;
1443 }
1444
1445 /// Move to the start of the line
1446 bool wxRichTextCtrl::MoveToLineStart(int flags)
1447 {
1448     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1449     if (line)
1450     {
1451         wxRichTextRange lineRange = line->GetAbsoluteRange();
1452         long newPos = lineRange.GetStart()-1;
1453
1454         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1455         if (!extendSel)
1456             SelectNone();
1457
1458         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1459
1460         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1461         PositionCaret();
1462         SetDefaultStyleToCursorStyle();
1463
1464         if (extendSel)
1465             Refresh(false);
1466         return true;
1467     }
1468
1469     return false;
1470 }
1471
1472 /// Move to the start of the buffer
1473 bool wxRichTextCtrl::MoveHome(int flags)
1474 {
1475     if (m_caretPosition != -1)
1476     {
1477         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1478         if (!extendSel)
1479             SelectNone();
1480
1481         SetCaretPosition(-1);
1482         PositionCaret();
1483         SetDefaultStyleToCursorStyle();
1484
1485         if (extendSel)
1486             Refresh(false);
1487         return true;
1488     }
1489     else
1490         return false;
1491 }
1492
1493 /// Move to the end of the buffer
1494 bool wxRichTextCtrl::MoveEnd(int flags)
1495 {
1496     long endPos = GetBuffer().GetRange().GetEnd()-1;
1497
1498     if (m_caretPosition != endPos)
1499     {
1500         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1501         if (!extendSel)
1502             SelectNone();
1503
1504         SetCaretPosition(endPos);
1505         PositionCaret();
1506         SetDefaultStyleToCursorStyle();
1507
1508         if (extendSel)
1509             Refresh(false);
1510         return true;
1511     }
1512     else
1513         return false;
1514 }
1515
1516 /// Move noPages pages up
1517 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1518 {
1519     return PageDown(- noPages, flags);
1520 }
1521
1522 /// Move noPages pages down
1523 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1524 {
1525     // Calculate which line occurs noPages * screen height further down.
1526     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1527     if (line)
1528     {
1529         wxSize clientSize = GetClientSize();
1530         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1531
1532         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1533         if (newLine)
1534         {
1535             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1536             long pos = lineRange.GetStart()-1;
1537             if (pos != m_caretPosition)
1538             {
1539                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1540
1541                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1542                 if (!extendSel)
1543                     SelectNone();
1544
1545                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1546                 PositionCaret();
1547                 SetDefaultStyleToCursorStyle();
1548
1549                 if (extendSel)
1550                     Refresh(false);
1551                 return true;
1552             }
1553         }
1554     }
1555
1556     return false;
1557 }
1558
1559 // Finds the caret position for the next word
1560 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1561 {
1562     long endPos = GetBuffer().GetRange().GetEnd();
1563
1564     if (direction > 0)
1565     {
1566         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1567
1568         // First skip current text to space
1569         while (i < endPos && i > -1)
1570         {
1571             // i is in character, not caret positions
1572             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1573             if (text != wxT(" ") && !text.empty())
1574                 i += direction;
1575             else
1576             {
1577                 break;
1578             }
1579         }
1580         while (i < endPos && i > -1)
1581         {
1582             // i is in character, not caret positions
1583             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1584             if (text.empty()) // End of paragraph, or maybe an image
1585                 return wxMax(-1, i - 1);
1586             else if (text == wxT(" ") || text.empty())
1587                 i += direction;
1588             else
1589             {
1590                 // Convert to caret position
1591                 return wxMax(-1, i - 1);
1592             }
1593         }
1594         if (i >= endPos)
1595             return endPos-1;
1596         return i-1;
1597     }
1598     else
1599     {
1600         long i = m_caretPosition;
1601
1602         // First skip white space
1603         while (i < endPos && i > -1)
1604         {
1605             // i is in character, not caret positions
1606             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1607             if (text.empty()) // End of paragraph, or maybe an image
1608                 break;
1609             else if (text == wxT(" ") || text.empty())
1610                 i += direction;
1611             else
1612                 break;
1613         }
1614         // Next skip current text to space
1615         while (i < endPos && i > -1)
1616         {
1617             // i is in character, not caret positions
1618             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1619             if (text != wxT(" ") /* && !text.empty() */)
1620                 i += direction;
1621             else
1622             {
1623                 return i;
1624             }
1625         }
1626         if (i < -1)
1627             return -1;
1628         return i;
1629     }
1630 }
1631
1632 /// Move n words left
1633 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1634 {
1635     long pos = FindNextWordPosition(-1);
1636     if (pos != m_caretPosition)
1637     {
1638         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1639
1640         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1641         if (!extendSel)
1642             SelectNone();
1643
1644         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1645         PositionCaret();
1646         SetDefaultStyleToCursorStyle();
1647
1648         if (extendSel)
1649             Refresh(false);
1650         return true;
1651     }
1652
1653     return false;
1654 }
1655
1656 /// Move n words right
1657 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1658 {
1659     long pos = FindNextWordPosition(1);
1660     if (pos != m_caretPosition)
1661     {
1662         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1663
1664         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1665         if (!extendSel)
1666             SelectNone();
1667
1668         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1669         PositionCaret();
1670         SetDefaultStyleToCursorStyle();
1671
1672         if (extendSel)
1673             Refresh(false);
1674         return true;
1675     }
1676
1677     return false;
1678 }
1679
1680 /// Sizing
1681 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1682 {
1683     // Only do sizing optimization for large buffers
1684     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1685     {
1686         m_fullLayoutRequired = true;
1687         m_fullLayoutTime = wxGetLocalTimeMillis();
1688         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1689         LayoutContent(true /* onlyVisibleRect */);
1690     }
1691     else
1692         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1693
1694 #if wxRICHTEXT_BUFFERED_PAINTING
1695     RecreateBuffer();
1696 #endif
1697
1698     event.Skip();
1699 }
1700
1701
1702 /// Idle-time processing
1703 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1704 {
1705     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1706
1707     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1708     {
1709         m_fullLayoutRequired = false;
1710         m_fullLayoutTime = 0;
1711         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1712         ShowPosition(m_fullLayoutSavedPosition);
1713         Refresh(false);
1714     }
1715
1716     if (m_caretPositionForDefaultStyle != -2)
1717     {
1718         // If the caret position has changed, no longer reflect the default style
1719         // in the UI.
1720         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1721             m_caretPositionForDefaultStyle = -2;
1722     }
1723
1724     event.Skip();
1725 }
1726
1727 /// Scrolling
1728 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1729 {
1730     // Not used
1731     event.Skip();
1732 }
1733
1734 /// Set up scrollbars, e.g. after a resize
1735 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1736 {
1737     if (m_freezeCount)
1738         return;
1739
1740     if (GetBuffer().IsEmpty())
1741     {
1742         SetScrollbars(0, 0, 0, 0, 0, 0);
1743         return;
1744     }
1745
1746     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1747     // of pixels. See e.g. wxVScrolledWindow for ideas.
1748     int pixelsPerUnit = 5;
1749     wxSize clientSize = GetClientSize();
1750
1751     int maxHeight = GetBuffer().GetCachedSize().y;
1752
1753     // Round up so we have at least maxHeight pixels
1754     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1755
1756     int startX = 0, startY = 0;
1757     if (!atTop)
1758         GetViewStart(& startX, & startY);
1759
1760     int maxPositionX = 0; // wxMax(sz.x - clientSize.x, 0);
1761     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
1762
1763     // Move to previous scroll position if
1764     // possible
1765     SetScrollbars(0, pixelsPerUnit,
1766         0, unitsY,
1767         wxMin(maxPositionX, startX), wxMin(maxPositionY, startY));
1768 }
1769
1770 /// Paint the background
1771 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1772 {
1773     wxColour backgroundColour = GetBackgroundColour();
1774     if (!backgroundColour.Ok())
1775         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1776
1777     // Clear the background
1778     dc.SetBrush(wxBrush(backgroundColour));
1779     dc.SetPen(*wxTRANSPARENT_PEN);
1780     wxRect windowRect(GetClientSize());
1781     windowRect.x -= 2; windowRect.y -= 2;
1782     windowRect.width += 4; windowRect.height += 4;
1783
1784     // We need to shift the rectangle to take into account
1785     // scrolling. Converting device to logical coordinates.
1786     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1787     dc.DrawRectangle(windowRect);
1788 }
1789
1790 #if wxRICHTEXT_BUFFERED_PAINTING
1791 /// Recreate buffer bitmap if necessary
1792 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1793 {
1794     wxSize sz = size;
1795     if (sz == wxDefaultSize)
1796         sz = GetClientSize();
1797
1798     if (sz.x < 1 || sz.y < 1)
1799         return false;
1800
1801     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1802         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1803     return m_bufferBitmap.Ok();
1804 }
1805 #endif
1806
1807 // ----------------------------------------------------------------------------
1808 // file IO functions
1809 // ----------------------------------------------------------------------------
1810
1811 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
1812 {
1813     bool success = GetBuffer().LoadFile(filename, fileType);
1814     if (success)
1815         m_filename = filename;
1816
1817     DiscardEdits();
1818     SetInsertionPoint(0);
1819     LayoutContent();
1820     PositionCaret();
1821     SetupScrollbars(true);
1822     Refresh(false);
1823     SendTextUpdatedEvent();
1824
1825     if (success)
1826         return true;
1827     else
1828     {
1829         wxLogError(_("File couldn't be loaded."));
1830
1831         return false;
1832     }
1833 }
1834
1835 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
1836 {
1837     if (GetBuffer().SaveFile(filename, fileType))
1838     {
1839         m_filename = filename;
1840
1841         DiscardEdits();
1842
1843         return true;
1844     }
1845
1846     wxLogError(_("The text couldn't be saved."));
1847
1848     return false;
1849 }
1850
1851 // ----------------------------------------------------------------------------
1852 // wxRichTextCtrl specific functionality
1853 // ----------------------------------------------------------------------------
1854
1855 /// Add a new paragraph of text to the end of the buffer
1856 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
1857 {
1858     return GetBuffer().AddParagraph(text);
1859 }
1860
1861 /// Add an image
1862 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
1863 {
1864     return GetBuffer().AddImage(image);
1865 }
1866
1867 // ----------------------------------------------------------------------------
1868 // selection and ranges
1869 // ----------------------------------------------------------------------------
1870
1871 void wxRichTextCtrl::SelectAll()
1872 {
1873     SetSelection(0, GetLastPosition()+1);
1874     m_selectionAnchor = -1;
1875 }
1876
1877 /// Select none
1878 void wxRichTextCtrl::SelectNone()
1879 {
1880     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
1881         SetSelection(-2, -2);
1882     m_selectionAnchor = -2;
1883 }
1884
1885 static bool wxIsWordDelimiter(const wxString& text)
1886 {
1887     return !text.IsEmpty() && !wxIsalnum(text[0]);
1888 }
1889
1890 /// Select the word at the given character position
1891 bool wxRichTextCtrl::SelectWord(long position)
1892 {
1893     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
1894         return false;
1895
1896     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
1897     if (!para)
1898         return false;
1899
1900     long positionStart = position;
1901     long positionEnd = position;
1902
1903     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
1904     {
1905         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
1906         if (wxIsWordDelimiter(text))
1907         {
1908             positionStart ++;
1909             break;
1910         }
1911     }
1912     if (positionStart < para->GetRange().GetStart())
1913         positionStart = para->GetRange().GetStart();
1914
1915     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
1916     {
1917         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
1918         if (wxIsWordDelimiter(text))
1919         {
1920             positionEnd --;
1921             break;
1922         }
1923     }
1924     if (positionEnd >= para->GetRange().GetEnd())
1925         positionEnd = para->GetRange().GetEnd();
1926
1927     SetSelection(positionStart, positionEnd+1);
1928
1929     if (positionStart >= 0)
1930     {
1931         MoveCaret(positionStart-1, true);
1932         SetDefaultStyleToCursorStyle();
1933     }
1934
1935     return true;
1936 }
1937
1938 wxString wxRichTextCtrl::GetStringSelection() const
1939 {
1940     long from, to;
1941     GetSelection(&from, &to);
1942
1943     return GetRange(from, to);
1944 }
1945
1946 // ----------------------------------------------------------------------------
1947 // hit testing
1948 // ----------------------------------------------------------------------------
1949
1950 wxTextCtrlHitTestResult
1951 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
1952 {
1953     // implement in terms of the other overload as the native ports typically
1954     // can get the position and not (x, y) pair directly (although wxUniv
1955     // directly gets x and y -- and so overrides this method as well)
1956     long pos;
1957     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
1958
1959     if ( rc != wxTE_HT_UNKNOWN )
1960     {
1961         PositionToXY(pos, x, y);
1962     }
1963
1964     return rc;
1965 }
1966
1967 wxTextCtrlHitTestResult
1968 wxRichTextCtrl::HitTest(const wxPoint& pt,
1969                         long * pos) const
1970 {
1971     wxClientDC dc((wxRichTextCtrl*) this);
1972     ((wxRichTextCtrl*)this)->PrepareDC(dc);
1973
1974     // Buffer uses logical position (relative to start of buffer)
1975     // so convert
1976     wxPoint pt2 = GetLogicalPoint(pt);
1977
1978     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
1979
1980     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
1981         return wxTE_HT_BEFORE;
1982     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
1983         return wxTE_HT_BEYOND;
1984     else if (hit & wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER)
1985         return wxTE_HT_ON_TEXT;
1986
1987     return wxTE_HT_UNKNOWN;
1988 }
1989
1990 // ----------------------------------------------------------------------------
1991 // set/get the controls text
1992 // ----------------------------------------------------------------------------
1993
1994 wxString wxRichTextCtrl::GetValue() const
1995 {
1996     return GetBuffer().GetText();
1997 }
1998
1999 wxString wxRichTextCtrl::GetRange(long from, long to) const
2000 {
2001     // Public API for range is different from internals
2002     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2003 }
2004
2005 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2006 {
2007     Clear();
2008
2009     // if the text is long enough, it's faster to just set it instead of first
2010     // comparing it with the old one (chances are that it will be different
2011     // anyhow, this comparison is there to avoid flicker for small single-line
2012     // edit controls mostly)
2013     if ( (value.length() > 0x400) || (value != GetValue()) )
2014     {
2015         DoWriteText(value);
2016
2017         // for compatibility, don't move the cursor when doing SetValue()
2018         SetInsertionPoint(0);
2019     }
2020     else // same text
2021     {
2022         if ( flags & SetValue_SendEvent )
2023         {
2024             // still send an event for consistency
2025             SendTextUpdatedEvent();
2026         }
2027     }
2028
2029     // we should reset the modified flag even if the value didn't really change
2030
2031     // mark the control as being not dirty - we changed its text, not the
2032     // user
2033     DiscardEdits();
2034 }
2035
2036 void wxRichTextCtrl::WriteText(const wxString& value)
2037 {
2038     DoWriteText(value);
2039 }
2040
2041 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2042 {
2043     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2044
2045     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2046
2047     if ( flags & SetValue_SendEvent )
2048         SendTextUpdatedEvent();
2049 }
2050
2051 void wxRichTextCtrl::AppendText(const wxString& text)
2052 {
2053     SetInsertionPointEnd();
2054
2055     WriteText(text);
2056 }
2057
2058 /// Write an image at the current insertion point
2059 bool wxRichTextCtrl::WriteImage(const wxImage& image, int bitmapType)
2060 {
2061     wxRichTextImageBlock imageBlock;
2062
2063     wxImage image2 = image;
2064     if (imageBlock.MakeImageBlock(image2, bitmapType))
2065         return WriteImage(imageBlock);
2066
2067     return false;
2068 }
2069
2070 bool wxRichTextCtrl::WriteImage(const wxString& filename, int bitmapType)
2071 {
2072     wxRichTextImageBlock imageBlock;
2073
2074     wxImage image;
2075     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2076         return WriteImage(imageBlock);
2077
2078     return false;
2079 }
2080
2081 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2082 {
2083     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2084 }
2085
2086 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, int bitmapType)
2087 {
2088     if (bitmap.Ok())
2089     {
2090         wxRichTextImageBlock imageBlock;
2091
2092         wxImage image = bitmap.ConvertToImage();
2093         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2094             return WriteImage(imageBlock);
2095     }
2096
2097     return false;
2098 }
2099
2100 /// Insert a newline (actually paragraph) at the current insertion point.
2101 bool wxRichTextCtrl::Newline()
2102 {
2103     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
2104 }
2105
2106 /// Insert a line break at the current insertion point.
2107 bool wxRichTextCtrl::LineBreak()
2108 {
2109     wxString text;
2110     text = wxRichTextLineBreakChar;
2111     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2112 }
2113
2114 // ----------------------------------------------------------------------------
2115 // Clipboard operations
2116 // ----------------------------------------------------------------------------
2117
2118 void wxRichTextCtrl::Copy()
2119 {
2120     if (CanCopy())
2121     {
2122         wxRichTextRange range = GetInternalSelectionRange();
2123         GetBuffer().CopyToClipboard(range);
2124     }
2125 }
2126
2127 void wxRichTextCtrl::Cut()
2128 {
2129     if (CanCut())
2130     {
2131         wxRichTextRange range = GetInternalSelectionRange();
2132         GetBuffer().CopyToClipboard(range);
2133
2134         DeleteSelectedContent();
2135         LayoutContent();
2136         Refresh(false);
2137     }
2138 }
2139
2140 void wxRichTextCtrl::Paste()
2141 {
2142     if (CanPaste())
2143     {
2144         BeginBatchUndo(_("Paste"));
2145
2146         long newPos = m_caretPosition;
2147         DeleteSelectedContent(& newPos);
2148
2149         GetBuffer().PasteFromClipboard(newPos);
2150
2151         EndBatchUndo();
2152     }
2153 }
2154
2155 void wxRichTextCtrl::DeleteSelection()
2156 {
2157     if (CanDeleteSelection())
2158     {
2159         DeleteSelectedContent();
2160     }
2161 }
2162
2163 bool wxRichTextCtrl::HasSelection() const
2164 {
2165     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2166 }
2167
2168 bool wxRichTextCtrl::CanCopy() const
2169 {
2170     // Can copy if there's a selection
2171     return HasSelection();
2172 }
2173
2174 bool wxRichTextCtrl::CanCut() const
2175 {
2176     return HasSelection() && IsEditable();
2177 }
2178
2179 bool wxRichTextCtrl::CanPaste() const
2180 {
2181     if ( !IsEditable() )
2182         return false;
2183
2184     return GetBuffer().CanPasteFromClipboard();
2185 }
2186
2187 bool wxRichTextCtrl::CanDeleteSelection() const
2188 {
2189     return HasSelection() && IsEditable();
2190 }
2191
2192
2193 // ----------------------------------------------------------------------------
2194 // Accessors
2195 // ----------------------------------------------------------------------------
2196
2197 void wxRichTextCtrl::SetEditable(bool editable)
2198 {
2199     m_editable = editable;
2200 }
2201
2202 void wxRichTextCtrl::SetInsertionPoint(long pos)
2203 {
2204     SelectNone();
2205
2206     m_caretPosition = pos - 1;
2207 }
2208
2209 void wxRichTextCtrl::SetInsertionPointEnd()
2210 {
2211     long pos = GetLastPosition();
2212     SetInsertionPoint(pos);
2213 }
2214
2215 long wxRichTextCtrl::GetInsertionPoint() const
2216 {
2217     return m_caretPosition+1;
2218 }
2219
2220 wxTextPos wxRichTextCtrl::GetLastPosition() const
2221 {
2222     return GetBuffer().GetRange().GetEnd();
2223 }
2224
2225 // If the return values from and to are the same, there is no
2226 // selection.
2227 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2228 {
2229     *from = m_selectionRange.GetStart();
2230     *to = m_selectionRange.GetEnd();
2231     if ((*to) != -1 && (*to) != -2)
2232         (*to) ++;
2233 }
2234
2235 bool wxRichTextCtrl::IsEditable() const
2236 {
2237     return m_editable;
2238 }
2239
2240 // ----------------------------------------------------------------------------
2241 // selection
2242 // ----------------------------------------------------------------------------
2243
2244 void wxRichTextCtrl::SetSelection(long from, long to)
2245 {
2246     // if from and to are both -1, it means (in wxWidgets) that all text should
2247     // be selected.
2248     if ( (from == -1) && (to == -1) )
2249     {
2250         from = 0;
2251         to = GetLastPosition()+1;
2252     }
2253
2254     DoSetSelection(from, to);
2255 }
2256
2257 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2258 {
2259     m_selectionAnchor = from;
2260     m_selectionRange.SetRange(from, to-1);
2261     if (from > -2)
2262         m_caretPosition = from-1;
2263
2264     Refresh(false);
2265     PositionCaret();
2266 }
2267
2268 // ----------------------------------------------------------------------------
2269 // Editing
2270 // ----------------------------------------------------------------------------
2271
2272 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2273                              const wxString& value)
2274 {
2275     BeginBatchUndo(_("Replace"));
2276
2277     DeleteSelectedContent();
2278
2279     DoWriteText(value, SetValue_SelectionOnly);
2280
2281     EndBatchUndo();
2282 }
2283
2284 void wxRichTextCtrl::Remove(long from, long to)
2285 {
2286     SelectNone();
2287
2288     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to), this);
2289
2290     LayoutContent();
2291     if (!IsFrozen())
2292         Refresh(false);
2293 }
2294
2295 bool wxRichTextCtrl::IsModified() const
2296 {
2297     return m_buffer.IsModified();
2298 }
2299
2300 void wxRichTextCtrl::MarkDirty()
2301 {
2302     m_buffer.Modify(true);
2303 }
2304
2305 void wxRichTextCtrl::DiscardEdits()
2306 {
2307     m_caretPositionForDefaultStyle = -2;
2308     m_buffer.Modify(false);
2309     m_buffer.GetCommandProcessor()->ClearCommands();
2310 }
2311
2312 int wxRichTextCtrl::GetNumberOfLines() const
2313 {
2314     return GetBuffer().GetParagraphCount();
2315 }
2316
2317 // ----------------------------------------------------------------------------
2318 // Positions <-> coords
2319 // ----------------------------------------------------------------------------
2320
2321 long wxRichTextCtrl::XYToPosition(long x, long y) const
2322 {
2323     return GetBuffer().XYToPosition(x, y);
2324 }
2325
2326 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2327 {
2328     return GetBuffer().PositionToXY(pos, x, y);
2329 }
2330
2331 // ----------------------------------------------------------------------------
2332 //
2333 // ----------------------------------------------------------------------------
2334
2335 void wxRichTextCtrl::ShowPosition(long pos)
2336 {
2337     if (!IsPositionVisible(pos))
2338         ScrollIntoView(pos-1, WXK_DOWN);
2339 }
2340
2341 int wxRichTextCtrl::GetLineLength(long lineNo) const
2342 {
2343     return GetBuffer().GetParagraphLength(lineNo);
2344 }
2345
2346 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2347 {
2348     return GetBuffer().GetParagraphText(lineNo);
2349 }
2350
2351 // ----------------------------------------------------------------------------
2352 // Undo/redo
2353 // ----------------------------------------------------------------------------
2354
2355 void wxRichTextCtrl::Undo()
2356 {
2357     if (CanUndo())
2358     {
2359         GetCommandProcessor()->Undo();
2360     }
2361 }
2362
2363 void wxRichTextCtrl::Redo()
2364 {
2365     if (CanRedo())
2366     {
2367         GetCommandProcessor()->Redo();
2368     }
2369 }
2370
2371 bool wxRichTextCtrl::CanUndo() const
2372 {
2373     return GetCommandProcessor()->CanUndo();
2374 }
2375
2376 bool wxRichTextCtrl::CanRedo() const
2377 {
2378     return GetCommandProcessor()->CanRedo();
2379 }
2380
2381 // ----------------------------------------------------------------------------
2382 // implementation details
2383 // ----------------------------------------------------------------------------
2384
2385 void wxRichTextCtrl::Command(wxCommandEvent& event)
2386 {
2387     SetValue(event.GetString());
2388     GetEventHandler()->ProcessEvent(event);
2389 }
2390
2391 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2392 {
2393     // By default, load the first file into the text window.
2394     if (event.GetNumberOfFiles() > 0)
2395     {
2396         LoadFile(event.GetFiles()[0]);
2397     }
2398 }
2399
2400 wxSize wxRichTextCtrl::DoGetBestSize() const
2401 {
2402     return wxSize(10, 10);
2403 }
2404
2405 // ----------------------------------------------------------------------------
2406 // standard handlers for standard edit menu events
2407 // ----------------------------------------------------------------------------
2408
2409 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2410 {
2411     Cut();
2412 }
2413
2414 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2415 {
2416     DeleteSelection();
2417 }
2418
2419 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2420 {
2421     Copy();
2422 }
2423
2424 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2425 {
2426     Paste();
2427 }
2428
2429 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2430 {
2431     Undo();
2432 }
2433
2434 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2435 {
2436     Redo();
2437 }
2438
2439 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2440 {
2441     event.Enable( CanCut() );
2442 }
2443
2444 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2445 {
2446     event.Enable( CanCopy() );
2447 }
2448
2449 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2450 {
2451     event.Enable( CanDeleteSelection() );
2452 }
2453
2454 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2455 {
2456     event.Enable( CanPaste() );
2457 }
2458
2459 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2460 {
2461     event.Enable( CanUndo() );
2462     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2463 }
2464
2465 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2466 {
2467     event.Enable( CanRedo() );
2468     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2469 }
2470
2471 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2472 {
2473     SelectAll();
2474 }
2475
2476 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2477 {
2478     event.Enable(GetLastPosition() > 0);
2479 }
2480
2481 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& WXUNUSED(event))
2482 {
2483     if (!m_contextMenu)
2484     {
2485         m_contextMenu = new wxMenu;
2486         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2487         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2488         m_contextMenu->AppendSeparator();
2489         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2490         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2491         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2492         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2493         m_contextMenu->AppendSeparator();
2494         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2495     }
2496     PopupMenu(m_contextMenu);
2497     return;
2498 }
2499
2500 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttrEx& style)
2501 {
2502     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style);
2503 }
2504
2505 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2506 {
2507     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttrEx(style));
2508 }
2509
2510 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxRichTextAttr& style)
2511 {
2512     return GetBuffer().SetStyle(range.ToInternal(), style);
2513 }
2514
2515 // extended style setting operation with flags including:
2516 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2517 // see richtextbuffer.h for more details.
2518 bool wxRichTextCtrl::SetStyleEx(long start, long end, const wxTextAttrEx& style, int flags)
2519 {
2520     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style, flags);
2521 }
2522
2523 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttrEx& style, int flags)
2524 {
2525     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2526 }
2527
2528 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxRichTextAttr& style, int flags)
2529 {
2530     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2531 }
2532
2533 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttrEx& style)
2534 {
2535     return GetBuffer().SetDefaultStyle(style);
2536 }
2537
2538 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2539 {
2540     return GetBuffer().SetDefaultStyle(wxTextAttrEx(style));
2541 }
2542
2543 const wxTextAttrEx& wxRichTextCtrl::GetDefaultStyleEx() const
2544 {
2545     return GetBuffer().GetDefaultStyle();
2546 }
2547
2548 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2549 {
2550     return GetBuffer().GetDefaultStyle();
2551 }
2552
2553 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2554 {
2555     wxTextAttrEx attr(style);
2556     if (GetBuffer().GetStyle(position, attr))
2557     {
2558         style = attr;
2559         return true;
2560     }
2561     else
2562         return false;
2563 }
2564
2565 bool wxRichTextCtrl::GetStyle(long position, wxTextAttrEx& style)
2566 {
2567     return GetBuffer().GetStyle(position, style);
2568 }
2569
2570 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style)
2571 {
2572     return GetBuffer().GetStyle(position, style);
2573 }
2574
2575 // get the common set of styles for the range
2576 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxRichTextAttr& style)
2577 {
2578     wxTextAttrEx styleEx;
2579     if (GetBuffer().GetStyleForRange(range.ToInternal(), styleEx))
2580     {
2581         style = styleEx;
2582         return true;
2583     }
2584     else
2585         return false;
2586 }
2587
2588 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttrEx& style)
2589 {
2590     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2591 }
2592
2593 /// Get the content (uncombined) attributes for this position.
2594
2595 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2596 {
2597     wxTextAttrEx attr(style);
2598     if (GetBuffer().GetUncombinedStyle(position, attr))
2599     {
2600         style = attr;
2601         return true;
2602     }
2603     else
2604         return false;
2605 }
2606
2607 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttrEx& style)
2608 {
2609     return GetBuffer().GetUncombinedStyle(position, style);
2610 }
2611
2612 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style)
2613 {
2614     return GetBuffer().GetUncombinedStyle(position, style);
2615 }
2616
2617 /// Set font, and also the buffer attributes
2618 bool wxRichTextCtrl::SetFont(const wxFont& font)
2619 {
2620     wxControl::SetFont(font);
2621
2622     wxTextAttrEx attr = GetBuffer().GetAttributes();
2623     attr.SetFont(font);
2624     GetBuffer().SetBasicStyle(attr);
2625
2626     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2627     Refresh(false);
2628
2629     return true;
2630 }
2631
2632 /// Transform logical to physical
2633 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2634 {
2635     wxPoint pt;
2636     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2637
2638     return pt;
2639 }
2640
2641 /// Transform physical to logical
2642 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2643 {
2644     wxPoint pt;
2645     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2646
2647     return pt;
2648 }
2649
2650 /// Position the caret
2651 void wxRichTextCtrl::PositionCaret()
2652 {
2653     if (!GetCaret())
2654         return;
2655
2656     //wxLogDebug(wxT("PositionCaret"));
2657
2658     wxRect caretRect;
2659     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2660     {
2661         wxPoint originalPt = caretRect.GetPosition();
2662         wxPoint pt = GetPhysicalPoint(originalPt);
2663         if (GetCaret()->GetPosition() != pt)
2664         {
2665             GetCaret()->Move(pt);
2666             GetCaret()->SetSize(caretRect.GetSize());
2667         }
2668     }
2669 }
2670
2671 /// Get the caret height and position for the given character position
2672 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2673 {
2674     wxClientDC dc(this);
2675     dc.SetFont(GetFont());
2676
2677     PrepareDC(dc);
2678
2679     wxPoint pt;
2680     int height = 0;
2681
2682     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2683     {
2684         // Caret height can't be zero
2685         if (height == 0)
2686             height = dc.GetCharHeight();
2687
2688         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2689         return true;
2690     }
2691
2692     return false;
2693 }
2694
2695 /// Gets the line for the visible caret position. If the caret is
2696 /// shown at the very end of the line, it means the next character is actually
2697 /// on the following line. So let's get the line we're expecting to find
2698 /// if this is the case.
2699 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2700 {
2701     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2702     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2703     if (line)
2704     {
2705         wxRichTextRange lineRange = line->GetAbsoluteRange();
2706         if (caretPosition == lineRange.GetStart()-1 &&
2707             (para->GetRange().GetStart() != lineRange.GetStart()))
2708         {
2709             if (!m_caretAtLineStart)
2710                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2711         }
2712     }
2713     return line;
2714 }
2715
2716
2717 /// Move the caret to the given character position
2718 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2719 {
2720     if (GetBuffer().GetDirty())
2721         LayoutContent();
2722
2723     if (pos <= GetBuffer().GetRange().GetEnd())
2724     {
2725         SetCaretPosition(pos, showAtLineStart);
2726
2727         PositionCaret();
2728
2729         return true;
2730     }
2731     else
2732         return false;
2733 }
2734
2735 /// Layout the buffer: which we must do before certain operations, such as
2736 /// setting the caret position.
2737 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2738 {
2739     if (GetBuffer().GetDirty() || onlyVisibleRect)
2740     {
2741         wxRect availableSpace(GetClientSize());
2742         if (availableSpace.width == 0)
2743             availableSpace.width = 10;
2744         if (availableSpace.height == 0)
2745             availableSpace.height = 10;
2746
2747         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2748         if (onlyVisibleRect)
2749         {
2750             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2751             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2752         }
2753
2754         wxClientDC dc(this);
2755         dc.SetFont(GetFont());
2756
2757         PrepareDC(dc);
2758
2759         GetBuffer().Defragment();
2760         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2761         GetBuffer().Layout(dc, availableSpace, flags);
2762         GetBuffer().SetDirty(false);
2763
2764         if (!IsFrozen())
2765             SetupScrollbars();
2766     }
2767
2768     return true;
2769 }
2770
2771 /// Is all of the selection bold?
2772 bool wxRichTextCtrl::IsSelectionBold()
2773 {
2774     if (HasSelection())
2775     {
2776         wxRichTextAttr attr;
2777         wxRichTextRange range = GetSelectionRange();
2778         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2779         attr.SetFontWeight(wxBOLD);
2780
2781         return HasCharacterAttributes(range, attr);
2782     }
2783     else
2784     {
2785         // If no selection, then we need to combine current style with default style
2786         // to see what the effect would be if we started typing.
2787         wxRichTextAttr attr;
2788         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2789
2790         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2791         if (GetStyle(pos, attr))
2792         {
2793             if (IsDefaultStyleShowing())
2794                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2795             return attr.GetFontWeight() == wxBOLD;
2796         }
2797     }
2798     return false;
2799 }
2800
2801 /// Is all of the selection italics?
2802 bool wxRichTextCtrl::IsSelectionItalics()
2803 {
2804     if (HasSelection())
2805     {
2806         wxRichTextRange range = GetSelectionRange();
2807         wxRichTextAttr attr;
2808         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2809         attr.SetFontStyle(wxITALIC);
2810
2811         return HasCharacterAttributes(range, attr);
2812     }
2813     else
2814     {
2815         // If no selection, then we need to combine current style with default style
2816         // to see what the effect would be if we started typing.
2817         wxRichTextAttr attr;
2818         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2819
2820         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2821         if (GetStyle(pos, attr))
2822         {
2823             if (IsDefaultStyleShowing())
2824                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2825             return attr.GetFontStyle() == wxITALIC;
2826         }
2827     }
2828     return false;
2829 }
2830
2831 /// Is all of the selection underlined?
2832 bool wxRichTextCtrl::IsSelectionUnderlined()
2833 {
2834     if (HasSelection())
2835     {
2836         wxRichTextRange range = GetSelectionRange();
2837         wxRichTextAttr attr;
2838         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2839         attr.SetFontUnderlined(true);
2840
2841         return HasCharacterAttributes(range, attr);
2842     }
2843     else
2844     {
2845         // If no selection, then we need to combine current style with default style
2846         // to see what the effect would be if we started typing.
2847         wxRichTextAttr attr;
2848         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2849         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2850
2851         if (GetStyle(pos, attr))
2852         {
2853             if (IsDefaultStyleShowing())
2854                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2855             return attr.GetFontUnderlined();
2856         }
2857     }
2858     return false;
2859 }
2860
2861 /// Apply bold to the selection
2862 bool wxRichTextCtrl::ApplyBoldToSelection()
2863 {
2864     wxRichTextAttr attr;
2865     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2866     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
2867
2868     if (HasSelection())
2869         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2870     else
2871         SetAndShowDefaultStyle(attr);
2872     return true;
2873 }
2874
2875 /// Apply italic to the selection
2876 bool wxRichTextCtrl::ApplyItalicToSelection()
2877 {
2878     wxRichTextAttr attr;
2879     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2880     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
2881
2882     if (HasSelection())
2883         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2884     else
2885         SetAndShowDefaultStyle(attr);
2886     return true;
2887 }
2888
2889 /// Apply underline to the selection
2890 bool wxRichTextCtrl::ApplyUnderlineToSelection()
2891 {
2892     wxRichTextAttr attr;
2893     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2894     attr.SetFontUnderlined(!IsSelectionUnderlined());
2895
2896     if (HasSelection())
2897         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2898     else
2899         SetAndShowDefaultStyle(attr);
2900     return true;
2901 }
2902
2903 /// Is all of the selection aligned according to the specified flag?
2904 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
2905 {
2906     wxRichTextRange range;
2907     if (HasSelection())
2908         range = GetSelectionRange();
2909     else
2910         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
2911
2912     wxRichTextAttr attr;
2913     attr.SetAlignment(alignment);
2914
2915     return HasParagraphAttributes(range, attr);
2916 }
2917
2918 /// Apply alignment to the selection
2919 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
2920 {
2921     wxRichTextAttr attr;
2922     attr.SetAlignment(alignment);
2923     if (HasSelection())
2924         return SetStyle(GetSelectionRange(), attr);
2925     else
2926     {
2927         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
2928         if (para)
2929             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
2930     }
2931     return true;
2932 }
2933
2934 /// Apply a named style to the selection
2935 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
2936 {
2937     // Flags are defined within each definition, so only certain
2938     // attributes are applied.
2939     wxRichTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
2940
2941     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE;
2942
2943     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
2944     {
2945         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2946
2947         wxRichTextRange range;
2948
2949         if (HasSelection())
2950             range = GetSelectionRange();
2951         else
2952         {
2953             long pos = GetAdjustedCaretPosition(GetCaretPosition());
2954             range = wxRichTextRange(pos, pos+1);
2955         }
2956
2957         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
2958     }
2959
2960     // Make sure the attr has the style name
2961     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
2962     {
2963         attr.SetParagraphStyleName(def->GetName());
2964
2965         // If applying a paragraph style, we only want the paragraph nodes to adopt these
2966         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
2967         // to change its style independently.
2968         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2969     }
2970     else
2971         attr.SetCharacterStyleName(def->GetName());
2972
2973     if (HasSelection())
2974         return SetStyleEx(GetSelectionRange(), attr, flags);
2975     else
2976     {
2977         SetAndShowDefaultStyle(attr);
2978         return true;
2979     }
2980 }
2981
2982 /// Apply the style sheet to the buffer, for example if the styles have changed.
2983 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
2984 {
2985     if (!styleSheet)
2986         styleSheet = GetBuffer().GetStyleSheet();
2987     if (!styleSheet)
2988         return false;
2989
2990     if (GetBuffer().ApplyStyleSheet(styleSheet))
2991     {
2992         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2993         Refresh(false);
2994         return true;
2995     }
2996     else
2997         return false;
2998 }
2999
3000 /// Sets the default style to the style under the cursor
3001 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3002 {
3003     wxTextAttrEx attr;
3004     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3005
3006     // If at the start of a paragraph, use the next position.
3007     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3008
3009     if (GetUncombinedStyle(pos, attr))
3010     {
3011         SetDefaultStyle(attr);
3012         return true;
3013     }
3014
3015     return false;
3016 }
3017
3018 /// Returns the first visible position in the current view
3019 long wxRichTextCtrl::GetFirstVisiblePosition() const
3020 {
3021     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3022     if (line)
3023         return line->GetAbsoluteRange().GetStart();
3024     else
3025         return 0;
3026 }
3027
3028 /// Get the first visible point in the window
3029 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3030 {
3031     int ppuX, ppuY;
3032     int startXUnits, startYUnits;
3033
3034     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3035     GetViewStart(& startXUnits, & startYUnits);
3036
3037     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3038 }
3039
3040 /// The adjusted caret position is the character position adjusted to take
3041 /// into account whether we're at the start of a paragraph, in which case
3042 /// style information should be taken from the next position, not current one.
3043 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3044 {
3045     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3046
3047     if (para && (caretPos+1 == para->GetRange().GetStart()))
3048         caretPos ++;
3049     return caretPos;
3050 }
3051
3052 /// Get/set the selection range in character positions. -1, -1 means no selection.
3053 /// The range is in API convention, i.e. a single character selection is denoted
3054 /// by (n, n+1)
3055 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3056 {
3057     wxRichTextRange range = GetInternalSelectionRange();
3058     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3059         range.SetEnd(range.GetEnd() + 1);
3060     return range;
3061 }
3062
3063 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3064 {
3065     wxRichTextRange range1(range);
3066     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3067         range1.SetEnd(range1.GetEnd() - 1);
3068
3069     wxASSERT( range1.GetStart() > range1.GetEnd() );
3070
3071     SetInternalSelectionRange(range1);
3072 }
3073
3074 /// Set list style
3075 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3076 {
3077     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3078 }
3079
3080 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3081 {
3082     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3083 }
3084
3085 /// Clear list for given range
3086 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3087 {
3088     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3089 }
3090
3091 /// Number/renumber any list elements in the given range
3092 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3093 {
3094     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3095 }
3096
3097 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3098 {
3099     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3100 }
3101
3102 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3103 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3104 {
3105     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3106 }
3107
3108 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3109 {
3110     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3111 }
3112
3113 /// Deletes the content in the given range
3114 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3115 {
3116     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3117 }
3118
3119 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3120 {
3121     if (sm_availableFontNames.GetCount() == 0)
3122     {
3123         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3124         sm_availableFontNames.Sort();
3125     }
3126     return sm_availableFontNames;
3127 }
3128
3129 void wxRichTextCtrl::ClearAvailableFontNames()
3130 {
3131     sm_availableFontNames.Clear();
3132 }
3133
3134 #endif
3135     // wxUSE_RICHTEXT