src/richtext/richtextctrl.cpp

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