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