src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #ifndef WX_PRECOMP
  20   #include "wx/wx.h"
  21 #endif
  22
  23 #include "wx/image.h"
  24
  25 #if wxUSE_RICHTEXT
  26
  27 #include "wx/textfile.h"
  28 #include "wx/ffile.h"
  29 #include "wx/settings.h"
  30 #include "wx/filename.h"
  31 #include "wx/dcbuffer.h"
  32
  33 #include "wx/richtext/richtextctrl.h"
  34 #include "wx/arrimpl.cpp"
  35
  36 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_ITEM_SELECTED)
  37 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_ITEM_DESELECTED)
  38 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_CLICK)
  39 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK)
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK)
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RETURN)
  43
  44 #if wxRICHTEXT_DERIVES_FROM_TEXTCTRLBASE
  45 IMPLEMENT_CLASS( wxRichTextCtrl, wxControl )
  46 #else
  47 IMPLEMENT_CLASS( wxRichTextCtrl, wxScrolledWindow )
  48 #endif
  49
  50 IMPLEMENT_CLASS( wxRichTextEvent, wxNotifyEvent )
  51
  52 #if wxRICHTEXT_DERIVES_FROM_TEXTCTRLBASE
  53 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
  54 #else
  55 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxScrolledWindow )
  56 #endif
  57     EVT_PAINT(wxRichTextCtrl::OnPaint)
  58     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
  59     EVT_IDLE(wxRichTextCtrl::OnIdle)
  60     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
  61     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
  62     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
  63     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
  64     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
  65     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
  66     EVT_CHAR(wxRichTextCtrl::OnChar)
  67     EVT_SIZE(wxRichTextCtrl::OnSize)
  68     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
  69     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
  70     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
  71
  72     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
  73     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
  74
  75     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
  76     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
  77
  78     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
  79     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
  80
  81     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
  82     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
  83
  84     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
  85     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
  86
  87     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
  88     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
  89
  90     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
  91     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
  92 END_EVENT_TABLE()
  93
  94 /*!
  95  * wxRichTextCtrl
  96  */
  97
  98 wxRichTextCtrl::wxRichTextCtrl()
  99 #if wxRICHTEXT_DERIVES_FROM_TEXTCTRLBASE
 100     : wxScrollHelper(this)
 101 #endif
 102 {
 103     Init();
 104 }
 105
 106 wxRichTextCtrl::wxRichTextCtrl( wxWindow* parent, wxWindowID id, const wxPoint& pos, const wxSize& size, long style)
 107 #if wxRICHTEXT_DERIVES_FROM_TEXTCTRLBASE
 108     : wxScrollHelper(this)
 109 #endif
 110 {
 111     Init();
 112     Create(parent, id, pos, size, style);
 113 }
 114
 115 /// Creation
 116 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxPoint& pos, const wxSize& size, long style)
 117 {
 118 #if wxRICHTEXT_DERIVES_FROM_TEXTCTRLBASE
 119     if (!wxTextCtrlBase::Create(parent, id, pos, size, style|wxFULL_REPAINT_ON_RESIZE
 120         ))
 121         return false;
 122 #else
 123     if (!wxScrolledWindow::Create(parent, id, pos, size, style|wxFULL_REPAINT_ON_RESIZE
 124         ))
 125         return false;
 126 #endif
 127
 128     if (!GetFont().Ok())
 129     {
 130         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 131     }
 132
 133     GetBuffer().SetRichTextCtrl(this);
 134
 135     wxTextAttrEx attributes;
 136     attributes.SetFont(GetFont());
 137     attributes.SetTextColour(*wxBLACK);
 138     attributes.SetBackgroundColour(*wxWHITE);
 139     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 140     attributes.SetFlags(wxTEXT_ATTR_ALL);
 141
 142     SetDefaultStyle(attributes);
 143     SetBasicStyle(attributes);
 144
 145     SetBackgroundColour(*wxWHITE);
 146     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 147
 148     // Tell the sizers to use the given or best size
 149     SetBestFittingSize(size);
 150
 151     // Create a buffer
 152     RecreateBuffer(size);
 153
 154     wxCaret* caret = new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16);
 155     SetCaret(caret);
 156     caret->Show();
 157     PositionCaret();
 158
 159     SetCursor(wxCursor(wxCURSOR_IBEAM));
 160
 161     return true;
 162 }
 163
 164 wxRichTextCtrl::~wxRichTextCtrl()
 165 {
 166     delete m_contextMenu;
 167 }
 168
 169 /// Member initialisation
 170 void wxRichTextCtrl::Init()
 171 {
 172     m_freezeCount = 0;
 173     m_contextMenu = NULL;
 174     m_caret = NULL;
 175     m_caretPosition = -1;
 176     m_selectionRange.SetRange(-2, -2);
 177     m_selectionAnchor = -2;
 178     m_editable = true;
 179     m_caretAtLineStart = false;
 180     m_dragging = false;
 181     m_fullLayoutRequired = false;
 182     m_fullLayoutTime = 0;
 183     m_fullLayoutSavedPosition = 0;
 184     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 185 }
 186
 187 /// Call Freeze to prevent refresh
 188 void wxRichTextCtrl::Freeze()
 189 {
 190     m_freezeCount ++;
 191 }
 192
 193 /// Call Thaw to refresh
 194 void wxRichTextCtrl::Thaw(bool refresh)
 195 {
 196     m_freezeCount --;
 197
 198     if (m_freezeCount == 0 && refresh)
 199     {
 200         SetupScrollbars();
 201         Refresh();
 202     }
 203 }
 204
 205 /// Clear all text
 206 void wxRichTextCtrl::Clear()
 207 {
 208     m_buffer.Reset();
 209     m_buffer.SetDirty(true);
 210     m_caretPosition = -1;
 211     m_caretAtLineStart = false;
 212     m_selectionRange.SetRange(-2, -2);
 213
 214     if (m_freezeCount == 0)
 215     {
 216         SetupScrollbars();
 217         Refresh();
 218     }
 219     SendUpdateEvent();
 220 }
 221
 222 /// Painting
 223 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 224 {
 225     wxBufferedPaintDC dc(this, m_bufferBitmap);
 226
 227     PrepareDC(dc);
 228
 229     if (m_freezeCount > 0)
 230         return;
 231
 232     dc.SetFont(GetFont());
 233
 234     // Paint the background
 235     PaintBackground(dc);
 236
 237     wxRegion dirtyRegion = GetUpdateRegion();
 238
 239     wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 240     wxRect availableSpace(GetClientSize());
 241     if (GetBuffer().GetDirty())
 242     {
 243         GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 244         GetBuffer().SetDirty(false);
 245         SetupScrollbars();
 246         PositionCaret();
 247     }
 248
 249     GetBuffer().Draw(dc, GetBuffer().GetRange(), GetSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 250 }
 251
 252 // Empty implementation, to prevent flicker
 253 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 254 {
 255 }
 256
 257 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 258 {
 259     if (!IsFrozen())
 260         Refresh();
 261 }
 262
 263 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 264 {
 265     if (!IsFrozen())
 266         Refresh();
 267 }
 268
 269 /// Left-click
 270 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 271 {
 272     SetFocus();
 273
 274     wxClientDC dc(this);
 275     PrepareDC(dc);
 276     dc.SetFont(GetFont());
 277
 278     long position = 0;
 279     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 280
 281     if (hit != wxRICHTEXT_HITTEST_NONE)
 282     {
 283         m_dragStart = event.GetLogicalPosition(dc);
 284         m_dragging = true;
 285         CaptureMouse();
 286
 287         SelectNone();
 288
 289         bool caretAtLineStart = false;
 290
 291         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 292         {
 293             // If we're at the start of a line (but not first in para)
 294             // then we should keep the caret showing at the start of the line
 295             // by showing the m_caretAtLineStart flag.
 296             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 297             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 298
 299             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 300                 caretAtLineStart = true;
 301             position --;
 302         }
 303
 304         MoveCaret(position, caretAtLineStart);
 305         SetDefaultStyleToCursorStyle();
 306
 307 #if 0
 308         wxWindow* p = GetParent();
 309         while (p && !p->IsKindOf(CLASSINFO(wxFrame)))
 310             p = p->GetParent();
 311
 312         wxFrame* frame = wxDynamicCast(p, wxFrame);
 313         if (frame)
 314         {
 315             wxString msg = wxString::Format(wxT("Found position %ld"), position);
 316             frame->SetStatusText(msg, 1);
 317         }
 318 #endif
 319     }
 320
 321     event.Skip();
 322 }
 323
 324 /// Left-up
 325 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& WXUNUSED(event))
 326 {
 327     if (m_dragging)
 328     {
 329         m_dragging = false;
 330         if (GetCapture() == this)
 331             ReleaseMouse();
 332     }
 333 }
 334
 335 /// Left-click
 336 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 337 {
 338     if (!event.Dragging())
 339     {
 340         event.Skip();
 341         return;
 342     }
 343
 344     wxClientDC dc(this);
 345     PrepareDC(dc);
 346     dc.SetFont(GetFont());
 347
 348     long position = 0;
 349     wxPoint logicalPt = event.GetLogicalPosition(dc);
 350     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 351
 352     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 353     {
 354         // TODO: test closeness
 355
 356         bool caretAtLineStart = false;
 357
 358         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 359         {
 360             // If we're at the start of a line (but not first in para)
 361             // then we should keep the caret showing at the start of the line
 362             // by showing the m_caretAtLineStart flag.
 363             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 364             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 365
 366             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 367                 caretAtLineStart = true;
 368             position --;
 369         }
 370
 371         if (m_caretPosition != position)
 372         {
 373             bool extendSel = ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 374
 375             MoveCaret(position, caretAtLineStart);
 376             SetDefaultStyleToCursorStyle();
 377
 378             if (extendSel)
 379                 Refresh();
 380         }
 381     }
 382 }
 383
 384 /// Right-click
 385 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 386 {
 387     SetFocus();
 388     event.Skip();
 389 }
 390
 391 /// Left-double-click
 392 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& event)
 393 {
 394     event.Skip();
 395 }
 396
 397 /// Middle-click
 398 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 399 {
 400     event.Skip();
 401 }
 402
 403 /// Key press
 404 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 405 {
 406     int flags = 0;
 407     if (event.ControlDown())
 408         flags |= wxRICHTEXT_CTRL_DOWN;
 409     if (event.ShiftDown())
 410         flags |= wxRICHTEXT_SHIFT_DOWN;
 411     if (event.AltDown())
 412         flags |= wxRICHTEXT_ALT_DOWN;
 413
 414     if (event.GetKeyCode() == WXK_LEFT ||
 415         event.GetKeyCode() == WXK_RIGHT ||
 416         event.GetKeyCode() == WXK_UP ||
 417         event.GetKeyCode() == WXK_DOWN ||
 418         event.GetKeyCode() == WXK_HOME ||
 419         event.GetKeyCode() == WXK_PAGEUP ||
 420         event.GetKeyCode() == WXK_PAGEDOWN ||
 421         event.GetKeyCode() == WXK_PRIOR ||
 422         event.GetKeyCode() == WXK_NEXT ||
 423         event.GetKeyCode() == WXK_END)
 424     {
 425         Navigate(event.GetKeyCode(), flags);
 426     }
 427     else if (event.GetKeyCode() == WXK_RETURN)
 428     {
 429         BeginBatchUndo(_("Insert Text"));
 430
 431         long newPos = m_caretPosition;
 432
 433         DeleteSelectedContent(& newPos);
 434
 435         GetBuffer().InsertNewlineWithUndo(newPos+1, this);
 436
 437         wxRichTextEvent cmdEvent(
 438             wxEVT_COMMAND_RICHTEXT_RETURN,
 439             GetId());
 440         cmdEvent.SetEventObject(this);
 441         cmdEvent.SetFlags(flags);
 442         GetEventHandler()->ProcessEvent(cmdEvent);
 443
 444         EndBatchUndo();
 445         SetDefaultStyleToCursorStyle();
 446     }
 447     else if (event.GetKeyCode() == WXK_BACK)
 448     {
 449         BeginBatchUndo(_("Delete Text"));
 450
 451         // Submit range in character positions, which are greater than caret positions,
 452         // so subtract 1 for deleted character and add 1 for conversion to character position.
 453         if (m_caretPosition > -1 && !HasSelection())
 454         {
 455             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition, m_caretPosition),
 456                 m_caretPosition,   // Current caret position
 457                 m_caretPosition-1, // New caret position
 458                 this);
 459         }
 460         else
 461             DeleteSelectedContent();
 462
 463         EndBatchUndo();
 464
 465         // Shouldn't this be in Do()?
 466         if (GetLastPosition() == -1)
 467         {
 468             GetBuffer().Reset();
 469
 470             m_caretPosition = -1;
 471             PositionCaret();
 472             SetDefaultStyleToCursorStyle();
 473         }
 474
 475     }
 476     else if (event.GetKeyCode() == WXK_DELETE)
 477     {
 478         BeginBatchUndo(_("Delete Text"));
 479
 480         // Submit range in character positions, which are greater than caret positions,
 481         if (m_caretPosition < GetBuffer().GetRange().GetEnd()+1 && !HasSelection())
 482         {
 483             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition+1, m_caretPosition+1),
 484                 m_caretPosition,   // Current caret position
 485                 m_caretPosition+1, // New caret position
 486                 this);
 487         }
 488         else
 489             DeleteSelectedContent();
 490
 491         EndBatchUndo();
 492
 493         // Shouldn't this be in Do()?
 494         if (GetLastPosition() == -1)
 495         {
 496             GetBuffer().Reset();
 497
 498             m_caretPosition = -1;
 499             PositionCaret();
 500             SetDefaultStyleToCursorStyle();
 501         }
 502     }
 503     else
 504     {
 505         BeginBatchUndo(_("Insert Text"));
 506
 507         long newPos = m_caretPosition;
 508         DeleteSelectedContent(& newPos);
 509
 510         wxString str = (wxChar) event.GetKeyCode();
 511         GetBuffer().InsertTextWithUndo(newPos+1, str, this);
 512
 513         EndBatchUndo();
 514
 515         SetDefaultStyleToCursorStyle();
 516     }
 517 #if 0
 518     else
 519         event.Skip();
 520 #endif
 521 }
 522
 523 /// Delete content if there is a selection, e.g. when pressing a key.
 524 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
 525 {
 526     if (HasSelection())
 527     {
 528         long pos = m_selectionRange.GetStart();
 529         GetBuffer().DeleteRangeWithUndo(m_selectionRange,
 530             m_caretPosition,       // Current caret position
 531             pos,    // New caret position
 532             this);
 533         m_selectionRange.SetRange(-2, -2);
 534
 535         if (newPos)
 536             *newPos = pos-1;
 537         return true;
 538     }
 539     else
 540         return false;
 541 }
 542
 543 /// Keyboard navigation
 544
 545 /*
 546
 547 Left:       left one character
 548 Right:      right one character
 549 Up:         up one line
 550 Down:       down one line
 551 Ctrl-Left:  left one word
 552 Ctrl-Right: right one word
 553 Ctrl-Up:    previous paragraph start
 554 Ctrl-Down:  next start of paragraph
 555 Home:       start of line
 556 End:        end of line
 557 Ctrl-Home:  start of document
 558 Ctrl-End:   end of document
 559 Page-Up:    Up a screen
 560 Page-Down:  Down a screen
 561
 562 Maybe:
 563
 564 Ctrl-Alt-PgUp: Start of window
 565 Ctrl-Alt-PgDn: End of window
 566 F8:         Start selection mode
 567 Esc:        End selection mode
 568
 569 Adding Shift does the above but starts/extends selection.
 570
 571
 572  */
 573
 574 bool wxRichTextCtrl::Navigate(int keyCode, int flags)
 575 {
 576     bool success = false;
 577     Freeze();
 578
 579     if (keyCode == WXK_RIGHT)
 580     {
 581         if (flags & wxRICHTEXT_CTRL_DOWN)
 582             success = WordRight(1, flags);
 583         else
 584             success = MoveRight(1, flags);
 585     }
 586     else if (keyCode == WXK_LEFT)
 587     {
 588         if (flags & wxRICHTEXT_CTRL_DOWN)
 589             success = WordLeft(1, flags);
 590         else
 591             success = MoveLeft(1, flags);
 592     }
 593     else if (keyCode == WXK_UP)
 594     {
 595         if (flags & wxRICHTEXT_CTRL_DOWN)
 596             success = MoveToParagraphStart(flags);
 597         else
 598             success = MoveUp(1, flags);
 599     }
 600     else if (keyCode == WXK_DOWN)
 601     {
 602         if (flags & wxRICHTEXT_CTRL_DOWN)
 603             success = MoveToParagraphEnd(flags);
 604         else
 605             success = MoveDown(1, flags);
 606     }
 607     else if (keyCode == WXK_PAGEUP || keyCode == WXK_PRIOR)
 608     {
 609         success = PageUp(1, flags);
 610     }
 611     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NEXT)
 612     {
 613         success = PageDown(1, flags);
 614     }
 615     else if (keyCode == WXK_HOME)
 616     {
 617         if (flags & wxRICHTEXT_CTRL_DOWN)
 618             success = MoveHome(flags);
 619         else
 620             success = MoveToLineStart(flags);
 621     }
 622     else if (keyCode == WXK_END)
 623     {
 624         if (flags & wxRICHTEXT_CTRL_DOWN)
 625             success = MoveEnd(flags);
 626         else
 627             success = MoveToLineEnd(flags);
 628     }
 629
 630     if (success)
 631     {
 632         ScrollIntoView(m_caretPosition, keyCode);
 633         SetDefaultStyleToCursorStyle();
 634     }
 635
 636     // Only refresh if something changed
 637     Thaw(success);
 638
 639     return success;
 640 }
 641
 642 /// Extend the selection. Selections are in caret positions.
 643 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
 644 {
 645     if (flags & wxRICHTEXT_SHIFT_DOWN)
 646     {
 647         // If not currently selecting, start selecting
 648         if (m_selectionRange.GetStart() == -2)
 649         {
 650             m_selectionAnchor = oldPos;
 651
 652             if (oldPos > newPos)
 653                 m_selectionRange.SetRange(newPos+1, oldPos);
 654             else
 655                 m_selectionRange.SetRange(oldPos+1, newPos);
 656         }
 657         else
 658         {
 659             // Always ensure that the selection range start is greater than
 660             // the end.
 661             if (newPos > m_selectionAnchor)
 662                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
 663             else
 664                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
 665         }
 666
 667         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
 668         {
 669             wxLogDebug(wxT("Strange selection range"));
 670         }
 671
 672         return true;
 673     }
 674     else
 675         return false;
 676 }
 677
 678 /// Scroll into view, returning true if we scrolled.
 679 /// This takes a _caret_ position.
 680 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
 681 {
 682     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
 683
 684     if (!line)
 685         return false;
 686
 687     int ppuX, ppuY;
 688     GetScrollPixelsPerUnit(& ppuX, & ppuY);
 689
 690     int startX, startY;
 691     GetViewStart(& startX, & startY);
 692     startX = 0;
 693     startY = startY * ppuY;
 694
 695     int sx, sy;
 696     GetVirtualSize(& sx, & sy);
 697     sx = 0;
 698     if (ppuY != 0)
 699         sy = sy/ppuY;
 700
 701     wxRect rect = line->GetRect();
 702
 703     bool scrolled = false;
 704
 705     wxSize clientSize = GetClientSize();
 706
 707     // Going down
 708     if (keyCode == WXK_DOWN || keyCode == WXK_RIGHT || keyCode == WXK_END || keyCode == WXK_NEXT || keyCode == WXK_PAGEDOWN)
 709     {
 710         if ((rect.y + rect.height) > (clientSize.y + startY))
 711         {
 712             // Make it scroll so this item is at the bottom
 713             // of the window
 714             int y = rect.y - (clientSize.y - rect.height);
 715             SetScrollbars(ppuX, ppuY, sx, sy, 0, (int) (0.5 + y/ppuY));
 716         }
 717         else if (rect.y < startY)
 718         {
 719             // Make it scroll so this item is at the top
 720             // of the window
 721             int y = rect.y ;
 722             SetScrollbars(ppuX, ppuY, sx, sy, 0, (int) (0.5 + y/ppuY));
 723         }
 724         scrolled = true;
 725     }
 726     // Going up
 727     else if (keyCode == WXK_UP || keyCode == WXK_LEFT || keyCode == WXK_HOME || keyCode == WXK_PRIOR || keyCode == WXK_PAGEUP)
 728     {
 729         if (rect.y < startY)
 730         {
 731             // Make it scroll so this item is at the top
 732             // of the window
 733             int y = rect.y ;
 734             SetScrollbars(ppuX, ppuY, sx, sy, 0, (int) (0.5 + y/ppuY));
 735         }
 736         else if ((rect.y + rect.height) > (clientSize.y + startY))
 737         {
 738             // Make it scroll so this item is at the bottom
 739             // of the window
 740             int y = rect.y - (clientSize.y - rect.height);
 741             SetScrollbars(ppuX, ppuY, sx, sy, 0, (int) (0.5 + y/ppuY));
 742         }
 743         scrolled = true;
 744     }
 745     PositionCaret();
 746
 747     return scrolled;
 748 }
 749
 750 /// Is the given position visible on the screen?
 751 bool wxRichTextCtrl::IsPositionVisible(long pos) const
 752 {
 753     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
 754
 755     if (!line)
 756         return false;
 757
 758     int ppuX, ppuY;
 759     GetScrollPixelsPerUnit(& ppuX, & ppuY);
 760
 761     int startX, startY;
 762     GetViewStart(& startX, & startY);
 763     startX = 0;
 764     startY = startY * ppuY;
 765
 766     int sx, sy;
 767     GetVirtualSize(& sx, & sy);
 768     sx = 0;
 769     if (ppuY != 0)
 770         sy = sy/ppuY;
 771
 772     wxRect rect = line->GetRect();
 773
 774     wxSize clientSize = GetClientSize();
 775
 776     return !(((rect.y + rect.height) > (clientSize.y + startY)) || rect.y < startY);
 777 }
 778
 779 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
 780 {
 781     m_caretPosition = position;
 782     m_caretAtLineStart = showAtLineStart;
 783 }
 784
 785 /// Move caret one visual step forward: this may mean setting a flag
 786 /// and keeping the same position if we're going from the end of one line
 787 /// to the start of the next, which may be the exact same caret position.
 788 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
 789 {
 790     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
 791
 792     // Only do the check if we're not at the end of the paragraph (where things work OK
 793     // anyway)
 794     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
 795     {
 796         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
 797
 798         if (line)
 799         {
 800             wxRichTextRange lineRange = line->GetAbsoluteRange();
 801
 802             // We're at the end of a line. See whether we need to
 803             // stay at the same actual caret position but change visual
 804             // position, or not.
 805             if (oldPosition == lineRange.GetEnd())
 806             {
 807                 if (m_caretAtLineStart)
 808                 {
 809                     // We're already at the start of the line, so actually move on now.
 810                     m_caretPosition = oldPosition + 1;
 811                     m_caretAtLineStart = false;
 812                 }
 813                 else
 814                 {
 815                     // We're showing at the end of the line, so keep to
 816                     // the same position but indicate that we're to show
 817                     // at the start of the next line.
 818                     m_caretPosition = oldPosition;
 819                     m_caretAtLineStart = true;
 820                 }
 821                 SetDefaultStyleToCursorStyle();
 822                 return;
 823             }
 824         }
 825     }
 826     m_caretPosition ++;
 827     SetDefaultStyleToCursorStyle();
 828 }
 829
 830 /// Move caret one visual step backward: this may mean setting a flag
 831 /// and keeping the same position if we're going from the end of one line
 832 /// to the start of the next, which may be the exact same caret position.
 833 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
 834 {
 835     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
 836
 837     // Only do the check if we're not at the start of the paragraph (where things work OK
 838     // anyway)
 839     if (para && (oldPosition != para->GetRange().GetStart()))
 840     {
 841         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
 842
 843         if (line)
 844         {
 845             wxRichTextRange lineRange = line->GetAbsoluteRange();
 846
 847             // We're at the start of a line. See whether we need to
 848             // stay at the same actual caret position but change visual
 849             // position, or not.
 850             if (oldPosition == lineRange.GetStart())
 851             {
 852                 m_caretPosition = oldPosition-1;
 853                 m_caretAtLineStart = true;
 854                 return;
 855             }
 856             else if (oldPosition == lineRange.GetEnd())
 857             {
 858                 if (m_caretAtLineStart)
 859                 {
 860                     // We're at the start of the line, so keep the same caret position
 861                     // but clear the start-of-line flag.
 862                     m_caretPosition = oldPosition;
 863                     m_caretAtLineStart = false;
 864                 }
 865                 else
 866                 {
 867                     // We're showing at the end of the line, so go back
 868                     // to the previous character position.
 869                     m_caretPosition = oldPosition - 1;
 870                 }
 871                 SetDefaultStyleToCursorStyle();
 872                 return;
 873             }
 874         }
 875     }
 876     m_caretPosition --;
 877     SetDefaultStyleToCursorStyle();
 878 }
 879
 880 /// Move right
 881 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
 882 {
 883     long endPos = GetBuffer().GetRange().GetEnd();
 884
 885     if (m_caretPosition + noPositions < endPos)
 886     {
 887         long oldPos = m_caretPosition;
 888         long newPos = m_caretPosition + noPositions;
 889
 890         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
 891         if (!extendSel)
 892             SelectNone();
 893
 894         // Determine by looking at oldPos and m_caretPosition whether
 895         // we moved from the end of a line to the start of the next line, in which case
 896         // we want to adjust the caret position such that it is positioned at the
 897         // start of the next line, rather than jumping past the first character of the
 898         // line.
 899         if (noPositions == 1 && !extendSel)
 900             MoveCaretForward(oldPos);
 901         else
 902             SetCaretPosition(newPos);
 903
 904         PositionCaret();
 905         SetDefaultStyleToCursorStyle();
 906
 907         if (!IsFrozen())
 908             Refresh(); // TODO: optimize so that if we didn't change the selection, we don't refresh
 909         return true;
 910     }
 911     else
 912         return false;
 913 }
 914
 915 /// Move left
 916 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
 917 {
 918     long startPos = -1;
 919
 920     if (m_caretPosition > startPos - noPositions + 1)
 921     {
 922         long oldPos = m_caretPosition;
 923         long newPos = m_caretPosition - noPositions;
 924         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
 925         if (!extendSel)
 926             SelectNone();
 927
 928         if (noPositions == 1 && !extendSel)
 929             MoveCaretBack(oldPos);
 930         else
 931             SetCaretPosition(newPos);
 932
 933         PositionCaret();
 934         SetDefaultStyleToCursorStyle();
 935
 936         if (!IsFrozen())
 937             Refresh();
 938         return true;
 939     }
 940     else
 941         return false;
 942 }
 943
 944 /// Move up
 945 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
 946 {
 947     return MoveDown(- noLines, flags);
 948 }
 949
 950 /// Move up
 951 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
 952 {
 953     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
 954     wxPoint pt = GetCaret()->GetPosition();
 955     long newLine = lineNumber + noLines;
 956
 957     if (lineNumber != -1)
 958     {
 959         if (noLines > 0)
 960         {
 961             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
 962
 963             if (newLine > lastLine)
 964                 return false;
 965         }
 966         else
 967         {
 968             if (newLine < 0)
 969                 return false;
 970         }
 971     }
 972
 973     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
 974     if (lineObj)
 975     {
 976         pt.y = lineObj->GetAbsolutePosition().y + 2;
 977     }
 978     else
 979         return false;
 980
 981     long newPos = 0;
 982     wxClientDC dc(this);
 983     PrepareDC(dc);
 984     dc.SetFont(GetFont());
 985
 986     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
 987
 988     if (hitTest != wxRICHTEXT_HITTEST_NONE)
 989     {
 990         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
 991         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
 992         // so we view the caret at the start of the line.
 993         bool caretLineStart = false;
 994         if (hitTest == wxRICHTEXT_HITTEST_BEFORE)
 995         {
 996             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
 997             wxRichTextRange lineRange;
 998             if (thisLine)
 999                 lineRange = thisLine->GetAbsoluteRange();
1000
1001             if (thisLine && (newPos-1) == lineRange.GetEnd())
1002             {
1003                 newPos --;
1004                 caretLineStart = true;
1005             }
1006             else
1007             {
1008                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1009                 if (para && para->GetRange().GetStart() == newPos)
1010                     newPos --;
1011             }
1012         }
1013
1014         long newSelEnd = newPos;
1015
1016         if (!ExtendSelection(m_caretPosition, newSelEnd, flags))
1017             SelectNone();
1018
1019         SetCaretPosition(newPos, caretLineStart);
1020         PositionCaret();
1021         SetDefaultStyleToCursorStyle();
1022
1023         if (!IsFrozen())
1024             Refresh();
1025         return true;
1026     }
1027     else
1028         return false;
1029 }
1030
1031 /// Move to the end of the paragraph
1032 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1033 {
1034     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1035     if (para)
1036     {
1037         long newPos = para->GetRange().GetEnd() - 1;
1038         if (!ExtendSelection(m_caretPosition, newPos, flags))
1039             SelectNone();
1040
1041         SetCaretPosition(newPos);
1042         PositionCaret();
1043         SetDefaultStyleToCursorStyle();
1044
1045         if (!IsFrozen())
1046             Refresh();
1047         return true;
1048     }
1049
1050     return false;
1051 }
1052
1053 /// Move to the start of the paragraph
1054 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1055 {
1056     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1057     if (para)
1058     {
1059         long newPos = para->GetRange().GetStart() - 1;
1060         if (!ExtendSelection(m_caretPosition, newPos, flags))
1061             SelectNone();
1062
1063         SetCaretPosition(newPos);
1064         PositionCaret();
1065         SetDefaultStyleToCursorStyle();
1066
1067         if (!IsFrozen())
1068             Refresh();
1069         return true;
1070     }
1071
1072     return false;
1073 }
1074
1075 /// Move to the end of the line
1076 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1077 {
1078     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1079
1080     if (line)
1081     {
1082         wxRichTextRange lineRange = line->GetAbsoluteRange();
1083         long newPos = lineRange.GetEnd();
1084         if (!ExtendSelection(m_caretPosition, newPos, flags))
1085             SelectNone();
1086
1087         SetCaretPosition(newPos);
1088         PositionCaret();
1089         SetDefaultStyleToCursorStyle();
1090
1091         if (!IsFrozen())
1092             Refresh();
1093         return true;
1094     }
1095
1096     return false;
1097 }
1098
1099 /// Move to the start of the line
1100 bool wxRichTextCtrl::MoveToLineStart(int flags)
1101 {
1102     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1103     if (line)
1104     {
1105         wxRichTextRange lineRange = line->GetAbsoluteRange();
1106         long newPos = lineRange.GetStart()-1;
1107
1108         if (!ExtendSelection(m_caretPosition, newPos, flags))
1109             SelectNone();
1110
1111         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1112
1113         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1114         PositionCaret();
1115         SetDefaultStyleToCursorStyle();
1116
1117         if (!IsFrozen())
1118             Refresh();
1119         return true;
1120     }
1121
1122     return false;
1123 }
1124
1125 /// Move to the start of the buffer
1126 bool wxRichTextCtrl::MoveHome(int flags)
1127 {
1128     if (m_caretPosition != -1)
1129     {
1130         if (!ExtendSelection(m_caretPosition, -1, flags))
1131             SelectNone();
1132
1133         SetCaretPosition(-1);
1134         PositionCaret();
1135         SetDefaultStyleToCursorStyle();
1136
1137         if (!IsFrozen())
1138             Refresh();
1139         return true;
1140     }
1141     else
1142         return false;
1143 }
1144
1145 /// Move to the end of the buffer
1146 bool wxRichTextCtrl::MoveEnd(int flags)
1147 {
1148     long endPos = GetBuffer().GetRange().GetEnd()-1;
1149
1150     if (m_caretPosition != endPos)
1151     {
1152         if (!ExtendSelection(m_caretPosition, endPos, flags))
1153             SelectNone();
1154
1155         SetCaretPosition(endPos);
1156         PositionCaret();
1157         SetDefaultStyleToCursorStyle();
1158
1159         if (!IsFrozen())
1160             Refresh();
1161         return true;
1162     }
1163     else
1164         return false;
1165 }
1166
1167 /// Move noPages pages up
1168 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1169 {
1170     return PageDown(- noPages, flags);
1171 }
1172
1173 /// Move noPages pages down
1174 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1175 {
1176     // Calculate which line occurs noPages * screen height further down.
1177     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1178     if (line)
1179     {
1180         wxSize clientSize = GetClientSize();
1181         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1182
1183         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1184         if (newLine)
1185         {
1186             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1187             long pos = lineRange.GetStart()-1;
1188             if (pos != m_caretPosition)
1189             {
1190                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1191
1192                 if (!ExtendSelection(m_caretPosition, pos, flags))
1193                     SelectNone();
1194
1195                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1196                 PositionCaret();
1197                 SetDefaultStyleToCursorStyle();
1198
1199                 if (!IsFrozen())
1200                     Refresh();
1201                 return true;
1202             }
1203         }
1204     }
1205
1206     return false;
1207 }
1208
1209 // Finds the caret position for the next word
1210 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1211 {
1212     long endPos = GetBuffer().GetRange().GetEnd();
1213
1214     if (direction > 0)
1215     {
1216         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1217
1218         // First skip current text to space
1219         while (i < endPos && i > -1)
1220         {
1221             // i is in character, not caret positions
1222             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1223             if (text != wxT(" ") && !text.empty())
1224                 i += direction;
1225             else
1226             {
1227                 break;
1228             }
1229         }
1230         while (i < endPos && i > -1)
1231         {
1232             // i is in character, not caret positions
1233             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1234             if (text.empty()) // End of paragraph, or maybe an image
1235                 return wxMax(-1, i - 1);
1236             else if (text == wxT(" ") || text.empty())
1237                 i += direction;
1238             else
1239             {
1240                 // Convert to caret position
1241                 return wxMax(-1, i - 1);
1242             }
1243         }
1244         if (i >= endPos)
1245             return endPos-1;
1246         return i-1;
1247     }
1248     else
1249     {
1250         long i = m_caretPosition;
1251
1252         // First skip white space
1253         while (i < endPos && i > -1)
1254         {
1255             // i is in character, not caret positions
1256             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1257             if (text.empty()) // End of paragraph, or maybe an image
1258                 break;
1259             else if (text == wxT(" ") || text.empty())
1260                 i += direction;
1261             else
1262                 break;
1263         }
1264         // Next skip current text to space
1265         while (i < endPos && i > -1)
1266         {
1267             // i is in character, not caret positions
1268             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1269             if (text != wxT(" ") /* && !text.empty() */)
1270                 i += direction;
1271             else
1272             {
1273                 return i;
1274             }
1275         }
1276         if (i < -1)
1277             return -1;
1278         return i;
1279     }
1280 }
1281
1282 /// Move n words left
1283 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1284 {
1285     long pos = FindNextWordPosition(-1);
1286     if (pos != m_caretPosition)
1287     {
1288         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1289
1290         if (!ExtendSelection(m_caretPosition, pos, flags))
1291             SelectNone();
1292
1293         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1294         PositionCaret();
1295         SetDefaultStyleToCursorStyle();
1296
1297         if (!IsFrozen())
1298             Refresh();
1299         return true;
1300     }
1301
1302     return false;
1303 }
1304
1305 /// Move n words right
1306 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1307 {
1308     long pos = FindNextWordPosition(1);
1309     if (pos != m_caretPosition)
1310     {
1311         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1312
1313         if (!ExtendSelection(m_caretPosition, pos, flags))
1314             SelectNone();
1315
1316         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1317         PositionCaret();
1318         SetDefaultStyleToCursorStyle();
1319
1320         if (!IsFrozen())
1321             Refresh();
1322         return true;
1323     }
1324
1325     return false;
1326 }
1327
1328 /// Sizing
1329 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1330 {
1331     // Only do sizing optimization for large buffers
1332     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1333     {
1334         m_fullLayoutRequired = true;
1335         m_fullLayoutTime = wxGetLocalTimeMillis();
1336         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1337         Layout(true /* onlyVisibleRect */);
1338     }
1339     else
1340         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1341
1342     RecreateBuffer();
1343
1344     event.Skip();
1345 }
1346
1347
1348 /// Idle-time processing
1349 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1350 {
1351     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1352
1353     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1354     {
1355         m_fullLayoutRequired = false;
1356         m_fullLayoutTime = 0;
1357         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1358         ShowPosition(m_fullLayoutSavedPosition);
1359         Refresh();
1360     }
1361     event.Skip();
1362 }
1363
1364 /// Set up scrollbars, e.g. after a resize
1365 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1366 {
1367     if (m_freezeCount)
1368         return;
1369
1370     if (GetBuffer().IsEmpty())
1371     {
1372         SetScrollbars(0, 0, 0, 0, 0, 0);
1373         return;
1374     }
1375
1376     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1377     // of pixels. See e.g. wxVScrolledWindow for ideas.
1378     int pixelsPerUnit = 5; // 10;
1379     wxSize clientSize = GetClientSize();
1380
1381     int maxHeight = GetBuffer().GetCachedSize().y;
1382
1383     int unitsY = maxHeight/pixelsPerUnit;
1384
1385     int startX = 0, startY = 0;
1386     if (!atTop)
1387         GetViewStart(& startX, & startY);
1388
1389     int maxPositionX = 0; // wxMax(sz.x - clientSize.x, 0);
1390     int maxPositionY = (wxMax(maxHeight - clientSize.y, 0))/pixelsPerUnit;
1391
1392     // Move to previous scroll position if
1393     // possible
1394     SetScrollbars(0, pixelsPerUnit,
1395         0, unitsY,
1396         wxMin(maxPositionX, startX), wxMin(maxPositionY, startY));
1397 }
1398
1399 /// Paint the background
1400 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1401 {
1402     wxColour backgroundColour = GetBackgroundColour();
1403     if (!backgroundColour.Ok())
1404         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1405
1406     // Clear the background
1407     dc.SetBrush(wxBrush(backgroundColour));
1408     dc.SetPen(*wxTRANSPARENT_PEN);
1409     wxRect windowRect(GetClientSize());
1410     windowRect.x -= 2; windowRect.y -= 2;
1411     windowRect.width += 4; windowRect.height += 4;
1412
1413     // We need to shift the rectangle to take into account
1414     // scrolling. Converting device to logical coordinates.
1415     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1416     dc.DrawRectangle(windowRect);
1417 }
1418
1419 /// Recreate buffer bitmap if necessary
1420 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1421 {
1422     wxSize sz = size;
1423     if (sz == wxDefaultSize)
1424         sz = GetClientSize();
1425
1426     if (sz.x < 1 || sz.y < 1)
1427         return false;
1428
1429     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1430         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1431     return m_bufferBitmap.Ok();
1432 }
1433
1434 // ----------------------------------------------------------------------------
1435 // file IO functions
1436 // ----------------------------------------------------------------------------
1437
1438 bool wxRichTextCtrl::LoadFile(const wxString& filename, int type)
1439 {
1440     bool success = GetBuffer().LoadFile(filename, type);
1441     if (success)
1442         m_filename = filename;
1443
1444     DiscardEdits();
1445     SetInsertionPoint(0);
1446     Layout();
1447     PositionCaret();
1448     SetupScrollbars(true);
1449     Refresh();
1450     SendUpdateEvent();
1451
1452     if (success)
1453         return true;
1454     else
1455     {
1456         wxLogError(_("File couldn't be loaded."));
1457
1458         return false;
1459     }
1460 }
1461
1462 bool wxRichTextCtrl::SaveFile(const wxString& filename, int type)
1463 {
1464     wxString filenameToUse = filename.empty() ? m_filename : filename;
1465     if ( filenameToUse.empty() )
1466     {
1467         // what kind of message to give? is it an error or a program bug?
1468         wxLogDebug(wxT("Can't save textctrl to file without filename."));
1469
1470         return false;
1471     }
1472
1473     if (GetBuffer().SaveFile(filenameToUse, type))
1474     {
1475         m_filename = filenameToUse;
1476
1477         DiscardEdits();
1478
1479         return true;
1480
1481     }
1482
1483     wxLogError(_("The text couldn't be saved."));
1484
1485     return false;
1486 }
1487
1488 // ----------------------------------------------------------------------------
1489 // wxRichTextCtrl specific functionality
1490 // ----------------------------------------------------------------------------
1491
1492 /// Add a new paragraph of text to the end of the buffer
1493 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
1494 {
1495     return GetBuffer().AddParagraph(text);
1496 }
1497
1498 /// Add an image
1499 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
1500 {
1501     return GetBuffer().AddImage(image);
1502 }
1503
1504 // ----------------------------------------------------------------------------
1505 // selection and ranges
1506 // ----------------------------------------------------------------------------
1507
1508 void wxRichTextCtrl::SelectAll()
1509 {
1510     SetSelection(0, GetLastPosition());
1511     m_selectionAnchor = -1;
1512 }
1513
1514 /// Select none
1515 void wxRichTextCtrl::SelectNone()
1516 {
1517     SetSelection(-2, -2);
1518     m_selectionAnchor = -2;
1519 }
1520
1521 wxString wxRichTextCtrl::GetStringSelection() const
1522 {
1523     long from, to;
1524     GetSelection(&from, &to);
1525
1526     return GetRange(from, to);
1527 }
1528
1529 // do the window-specific processing after processing the update event
1530 void wxRichTextCtrl::DoUpdateWindowUI(wxUpdateUIEvent& event)
1531 {
1532     if ( event.GetSetEnabled() )
1533         Enable(event.GetEnabled());
1534
1535     if ( event.GetSetText() )
1536     {
1537         if ( event.GetText() != GetValue() )
1538             SetValue(event.GetText());
1539     }
1540 }
1541
1542 // ----------------------------------------------------------------------------
1543 // hit testing
1544 // ----------------------------------------------------------------------------
1545
1546 wxTextCtrlHitTestResult
1547 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
1548 {
1549     // implement in terms of the other overload as the native ports typically
1550     // can get the position and not (x, y) pair directly (although wxUniv
1551     // directly gets x and y -- and so overrides this method as well)
1552     long pos;
1553     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
1554
1555     if ( rc != wxTE_HT_UNKNOWN )
1556     {
1557         PositionToXY(pos, x, y);
1558     }
1559
1560     return rc;
1561 }
1562
1563 wxTextCtrlHitTestResult
1564 wxRichTextCtrl::HitTest(const wxPoint& pt,
1565                         long * pos) const
1566 {
1567     wxClientDC dc((wxRichTextCtrl*) this);
1568     ((wxRichTextCtrl*)this)->PrepareDC(dc);
1569
1570     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt, *pos);
1571     if (hit == wxRICHTEXT_HITTEST_BEFORE)
1572         return wxTE_HT_BEFORE;
1573     else if (hit == wxRICHTEXT_HITTEST_AFTER)
1574         return wxTE_HT_BEYOND;
1575     else if (hit == wxRICHTEXT_HITTEST_ON)
1576         return wxTE_HT_ON_TEXT;
1577     else
1578         return wxTE_HT_UNKNOWN;
1579 }
1580
1581 // ----------------------------------------------------------------------------
1582 // set/get the controls text
1583 // ----------------------------------------------------------------------------
1584
1585 wxString wxRichTextCtrl::GetValue() const
1586 {
1587     return GetBuffer().GetText();
1588 }
1589
1590 wxString wxRichTextCtrl::GetRange(long from, long to) const
1591 {
1592     return GetBuffer().GetTextForRange(wxRichTextRange(from, to));
1593 }
1594
1595 void wxRichTextCtrl::SetValue(const wxString& value)
1596 {
1597     Clear();
1598
1599     // if the text is long enough, it's faster to just set it instead of first
1600     // comparing it with the old one (chances are that it will be different
1601     // anyhow, this comparison is there to avoid flicker for small single-line
1602     // edit controls mostly)
1603     if ( (value.length() > 0x400) || (value != GetValue()) )
1604     {
1605         DoWriteText(value, false /* not selection only */);
1606
1607         // for compatibility, don't move the cursor when doing SetValue()
1608         SetInsertionPoint(0);
1609     }
1610     else // same text
1611     {
1612         // still send an event for consistency
1613         SendUpdateEvent();
1614     }
1615
1616     // we should reset the modified flag even if the value didn't really change
1617
1618     // mark the control as being not dirty - we changed its text, not the
1619     // user
1620     DiscardEdits();
1621 }
1622
1623 void wxRichTextCtrl::WriteText(const wxString& value)
1624 {
1625     DoWriteText(value);
1626 }
1627
1628 void wxRichTextCtrl::DoWriteText(const wxString& value, bool WXUNUSED(selectionOnly))
1629 {
1630     GetBuffer().InsertTextWithUndo(m_caretPosition+1, value, this);
1631 }
1632
1633 void wxRichTextCtrl::AppendText(const wxString& text)
1634 {
1635     SetInsertionPointEnd();
1636
1637     WriteText(text);
1638 }
1639
1640 /// Write an image at the current insertion point
1641 bool wxRichTextCtrl::WriteImage(const wxImage& image, int bitmapType)
1642 {
1643     wxRichTextImageBlock imageBlock;
1644
1645     wxImage image2 = image;
1646     if (imageBlock.MakeImageBlock(image2, bitmapType))
1647         return WriteImage(imageBlock);
1648     else
1649         return false;
1650 }
1651
1652 bool wxRichTextCtrl::WriteImage(const wxString& filename, int bitmapType)
1653 {
1654     wxRichTextImageBlock imageBlock;
1655
1656     wxImage image;
1657     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
1658         return WriteImage(imageBlock);
1659     else
1660         return false;
1661 }
1662
1663 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
1664 {
1665     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
1666 }
1667
1668 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, int bitmapType)
1669 {
1670     if (bitmap.Ok())
1671     {
1672         wxRichTextImageBlock imageBlock;
1673
1674         wxImage image = bitmap.ConvertToImage();
1675         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
1676             return WriteImage(imageBlock);
1677         else
1678             return false;
1679     }
1680     return false;
1681 }
1682
1683 /// Insert a newline (actually paragraph) at the current insertion point.
1684 bool wxRichTextCtrl::Newline()
1685 {
1686     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
1687 }
1688
1689
1690 // ----------------------------------------------------------------------------
1691 // Clipboard operations
1692 // ----------------------------------------------------------------------------
1693
1694 void wxRichTextCtrl::Copy()
1695 {
1696     if (CanCopy())
1697     {
1698         wxRichTextRange range = GetSelectionRange();
1699         GetBuffer().CopyToClipboard(range);
1700     }
1701 }
1702
1703 void wxRichTextCtrl::Cut()
1704 {
1705     if (CanCut())
1706     {
1707         wxRichTextRange range = GetSelectionRange();
1708         GetBuffer().CopyToClipboard(range);
1709
1710         DeleteSelectedContent();
1711         Layout();
1712         Refresh();
1713     }
1714 }
1715
1716 void wxRichTextCtrl::Paste()
1717 {
1718     if (CanPaste())
1719     {
1720         BeginBatchUndo(_("Paste"));
1721
1722         long newPos = m_caretPosition;
1723         DeleteSelectedContent(& newPos);
1724
1725         GetBuffer().PasteFromClipboard(newPos);
1726
1727         EndBatchUndo();
1728     }
1729 }
1730
1731 void wxRichTextCtrl::DeleteSelection()
1732 {
1733     if (CanDeleteSelection())
1734     {
1735         DeleteSelectedContent();
1736     }
1737 }
1738
1739 bool wxRichTextCtrl::HasSelection() const
1740 {
1741     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
1742 }
1743
1744 bool wxRichTextCtrl::CanCopy() const
1745 {
1746     // Can copy if there's a selection
1747     return HasSelection();
1748 }
1749
1750 bool wxRichTextCtrl::CanCut() const
1751 {
1752     return HasSelection() && IsEditable();
1753 }
1754
1755 bool wxRichTextCtrl::CanPaste() const
1756 {
1757     if ( !IsEditable() )
1758         return false;
1759
1760     return GetBuffer().CanPasteFromClipboard();
1761 }
1762
1763 bool wxRichTextCtrl::CanDeleteSelection() const
1764 {
1765     return HasSelection() && IsEditable();
1766 }
1767
1768
1769 // ----------------------------------------------------------------------------
1770 // Accessors
1771 // ----------------------------------------------------------------------------
1772
1773 void wxRichTextCtrl::SetEditable(bool editable)
1774 {
1775     m_editable = editable;
1776 }
1777
1778 void wxRichTextCtrl::SetInsertionPoint(long pos)
1779 {
1780     SelectNone();
1781
1782     m_caretPosition = pos - 1;
1783 }
1784
1785 void wxRichTextCtrl::SetInsertionPointEnd()
1786 {
1787     long pos = GetLastPosition();
1788     SetInsertionPoint(pos);
1789 }
1790
1791 long wxRichTextCtrl::GetInsertionPoint() const
1792 {
1793     return m_caretPosition+1;
1794 }
1795
1796 wxTextPos wxRichTextCtrl::GetLastPosition() const
1797 {
1798     return GetBuffer().GetRange().GetEnd();
1799 }
1800
1801 // If the return values from and to are the same, there is no
1802 // selection.
1803 void wxRichTextCtrl::GetSelection(long* from, long* to) const
1804 {
1805     *from = m_selectionRange.GetStart();
1806     *to = m_selectionRange.GetEnd();
1807 }
1808
1809 bool wxRichTextCtrl::IsEditable() const
1810 {
1811     return m_editable;
1812 }
1813
1814 // ----------------------------------------------------------------------------
1815 // selection
1816 // ----------------------------------------------------------------------------
1817
1818 void wxRichTextCtrl::SetSelection(long from, long to)
1819 {
1820     // if from and to are both -1, it means (in wxWidgets) that all text should
1821     // be selected.
1822     if ( (from == -1) && (to == -1) )
1823     {
1824         from = 0;
1825         to = GetLastPosition();
1826     }
1827
1828     DoSetSelection(from, to);
1829 }
1830
1831 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
1832 {
1833     m_selectionAnchor = from;
1834     m_selectionRange.SetRange(from, to);
1835     if (!IsFrozen())
1836         Refresh();
1837     PositionCaret();
1838 }
1839
1840 // ----------------------------------------------------------------------------
1841 // Editing
1842 // ----------------------------------------------------------------------------
1843
1844 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to), const wxString& value)
1845 {
1846     BeginBatchUndo(_("Replace"));
1847
1848     DeleteSelectedContent();
1849
1850     DoWriteText(value, true /* selection only */);
1851
1852     EndBatchUndo();
1853 }
1854
1855 void wxRichTextCtrl::Remove(long from, long to)
1856 {
1857     SelectNone();
1858
1859     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to),
1860         m_caretPosition,       // Current caret position
1861         from,                           // New caret position
1862         this);
1863
1864     Layout();
1865     if (!IsFrozen())
1866         Refresh();
1867 }
1868
1869 bool wxRichTextCtrl::IsModified() const
1870 {
1871     return m_buffer.IsModified();
1872 }
1873
1874 void wxRichTextCtrl::MarkDirty()
1875 {
1876     m_buffer.Modify(true);
1877 }
1878
1879 void wxRichTextCtrl::DiscardEdits()
1880 {
1881     m_buffer.Modify(false);
1882     m_buffer.GetCommandProcessor()->ClearCommands();
1883 }
1884
1885 int wxRichTextCtrl::GetNumberOfLines() const
1886 {
1887     return GetBuffer().GetParagraphCount();
1888 }
1889
1890 // ----------------------------------------------------------------------------
1891 // Positions <-> coords
1892 // ----------------------------------------------------------------------------
1893
1894 long wxRichTextCtrl::XYToPosition(long x, long y) const
1895 {
1896     return GetBuffer().XYToPosition(x, y);
1897 }
1898
1899 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
1900 {
1901     return GetBuffer().PositionToXY(pos, x, y);
1902 }
1903
1904 // ----------------------------------------------------------------------------
1905 //
1906 // ----------------------------------------------------------------------------
1907
1908 void wxRichTextCtrl::ShowPosition(long pos)
1909 {
1910     if (!IsPositionVisible(pos))
1911         ScrollIntoView(pos-1, WXK_DOWN);
1912 }
1913
1914 int wxRichTextCtrl::GetLineLength(long lineNo) const
1915 {
1916     return GetBuffer().GetParagraphLength(lineNo);
1917 }
1918
1919 wxString wxRichTextCtrl::GetLineText(long lineNo) const
1920 {
1921     return GetBuffer().GetParagraphText(lineNo);
1922 }
1923
1924 // ----------------------------------------------------------------------------
1925 // Undo/redo
1926 // ----------------------------------------------------------------------------
1927
1928 void wxRichTextCtrl::Undo()
1929 {
1930     if (CanUndo())
1931     {
1932         GetCommandProcessor()->Undo();
1933     }
1934 }
1935
1936 void wxRichTextCtrl::Redo()
1937 {
1938     if (CanRedo())
1939     {
1940         GetCommandProcessor()->Redo();
1941     }
1942 }
1943
1944 bool wxRichTextCtrl::CanUndo() const
1945 {
1946     return GetCommandProcessor()->CanUndo();
1947 }
1948
1949 bool wxRichTextCtrl::CanRedo() const
1950 {
1951     return GetCommandProcessor()->CanRedo();
1952 }
1953
1954 // ----------------------------------------------------------------------------
1955 // implemenation details
1956 // ----------------------------------------------------------------------------
1957
1958 void wxRichTextCtrl::Command(wxCommandEvent & event)
1959 {
1960     SetValue(event.GetString());
1961     GetEventHandler()->ProcessEvent(event);
1962 }
1963
1964 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1965 {
1966     // By default, load the first file into the text window.
1967     if (event.GetNumberOfFiles() > 0)
1968     {
1969         LoadFile(event.GetFiles()[0]);
1970     }
1971 }
1972
1973 // ----------------------------------------------------------------------------
1974 // text control event processing
1975 // ----------------------------------------------------------------------------
1976
1977 bool wxRichTextCtrl::SendUpdateEvent()
1978 {
1979     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1980     InitCommandEvent(event);
1981
1982     return GetEventHandler()->ProcessEvent(event);
1983 }
1984
1985 void wxRichTextCtrl::InitCommandEvent(wxCommandEvent& event) const
1986 {
1987     event.SetEventObject((wxControlBase *)this);    // const_cast
1988
1989     switch ( m_clientDataType )
1990     {
1991         case wxClientData_Void:
1992             event.SetClientData(GetClientData());
1993             break;
1994
1995         case wxClientData_Object:
1996             event.SetClientObject(GetClientObject());
1997             break;
1998
1999         case wxClientData_None:
2000             // nothing to do
2001             ;
2002     }
2003 }
2004
2005
2006 wxSize wxRichTextCtrl::DoGetBestSize() const
2007 {
2008     return wxSize(10, 10);
2009 }
2010
2011 // ----------------------------------------------------------------------------
2012 // standard handlers for standard edit menu events
2013 // ----------------------------------------------------------------------------
2014
2015 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2016 {
2017     Cut();
2018 }
2019
2020 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2021 {
2022     DeleteSelection();
2023 }
2024
2025 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2026 {
2027     Copy();
2028 }
2029
2030 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2031 {
2032     Paste();
2033 }
2034
2035 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2036 {
2037     Undo();
2038 }
2039
2040 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2041 {
2042     Redo();
2043 }
2044
2045 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2046 {
2047     event.Enable( CanCut() );
2048 }
2049
2050 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2051 {
2052     event.Enable( CanCopy() );
2053 }
2054
2055 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2056 {
2057     event.Enable( CanDeleteSelection() );
2058 }
2059
2060 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2061 {
2062     event.Enable( CanPaste() );
2063 }
2064
2065 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2066 {
2067     event.Enable( CanUndo() );
2068     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2069 }
2070
2071 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2072 {
2073     event.Enable( CanRedo() );
2074     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2075 }
2076
2077 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2078 {
2079     SelectAll();
2080 }
2081
2082 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2083 {
2084     event.Enable(GetLastPosition() > 0);
2085 }
2086
2087 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& WXUNUSED(event))
2088 {
2089     if (!m_contextMenu)
2090     {
2091         m_contextMenu = new wxMenu;
2092         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2093         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2094         m_contextMenu->AppendSeparator();
2095         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2096         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2097         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2098         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2099         m_contextMenu->AppendSeparator();
2100         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2101     }
2102     PopupMenu(m_contextMenu);
2103     return;
2104 }
2105
2106 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttrEx& style)
2107 {
2108     return GetBuffer().SetStyle(wxRichTextRange(start, end), style);
2109 }
2110
2111 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxRichTextAttr& style)
2112 {
2113     return GetBuffer().SetStyle(range, style);
2114 }
2115
2116 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttrEx& style)
2117 {
2118     return GetBuffer().SetDefaultStyle(style);
2119 }
2120
2121 const wxTextAttrEx& wxRichTextCtrl::GetDefaultStyleEx() const
2122 {
2123     return GetBuffer().GetDefaultStyle();
2124 }
2125
2126 bool wxRichTextCtrl::GetStyle(long position, wxTextAttrEx& style) const
2127 {
2128     return GetBuffer().GetStyle(position, style);
2129 }
2130
2131 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style) const
2132 {
2133     return GetBuffer().GetStyle(position, style);
2134 }
2135
2136 /// Set font, and also the buffer attributes
2137 bool wxRichTextCtrl::SetFont(const wxFont& font)
2138 {
2139 #if wxRICHTEXT_DERIVES_FROM_TEXTCTRLBASE
2140     wxControl::SetFont(font);
2141 #else
2142     wxScrolledWindow::SetFont(font);
2143 #endif
2144
2145     wxTextAttrEx attr = GetBuffer().GetAttributes();
2146     attr.SetFont(font);
2147     GetBuffer().SetBasicStyle(attr);
2148     GetBuffer().SetDefaultStyle(attr);
2149
2150     return true;
2151 }
2152
2153 /// Transform logical to physical
2154 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2155 {
2156     wxPoint pt;
2157     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2158
2159     return pt;
2160 }
2161
2162 /// Transform physical to logical
2163 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2164 {
2165     wxPoint pt;
2166     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2167
2168     return pt;
2169 }
2170
2171 /// Position the caret
2172 void wxRichTextCtrl::PositionCaret()
2173 {
2174     wxRect caretRect;
2175     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2176     {
2177         wxPoint originalPt = caretRect.GetPosition();
2178         wxPoint pt = GetPhysicalPoint(originalPt);
2179
2180         GetCaret()->Move(pt);
2181         GetCaret()->SetSize(caretRect.GetSize());
2182     }
2183 }
2184
2185 /// Get the caret height and position for the given character position
2186 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2187 {
2188     wxClientDC dc(this);
2189     dc.SetFont(GetFont());
2190
2191     PrepareDC(dc);
2192
2193     wxPoint pt;
2194     int height = 0;
2195
2196     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2197     {
2198         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2199         return true;
2200     }
2201     else
2202         return false;
2203 }
2204
2205 /// Gets the line for the visible caret position. If the caret is
2206 /// shown at the very end of the line, it means the next character is actually
2207 /// on the following line. So let's get the line we're expecting to find
2208 /// if this is the case.
2209 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2210 {
2211     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2212     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2213     if (line)
2214     {
2215         wxRichTextRange lineRange = line->GetAbsoluteRange();
2216         if (caretPosition == lineRange.GetStart()-1 &&
2217             (para->GetRange().GetStart() != lineRange.GetStart()))
2218         {
2219             if (!m_caretAtLineStart)
2220                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2221         }
2222     }
2223     return line;
2224 }
2225
2226
2227 /// Move the caret to the given character position
2228 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2229 {
2230     if (GetBuffer().GetDirty())
2231         Layout();
2232
2233     if (pos <= GetBuffer().GetRange().GetEnd())
2234     {
2235         SetCaretPosition(pos, showAtLineStart);
2236
2237         PositionCaret();
2238
2239         return true;
2240     }
2241     else
2242         return false;
2243 }
2244
2245 /// Layout the buffer: which we must do before certain operations, such as
2246 /// setting the caret position.
2247 bool wxRichTextCtrl::Layout(bool onlyVisibleRect)
2248 {
2249     if (GetBuffer().GetDirty() || onlyVisibleRect)
2250     {
2251         wxRect availableSpace(GetClientSize());
2252         if (availableSpace.width == 0)
2253             availableSpace.width = 10;
2254         if (availableSpace.height == 0)
2255             availableSpace.height = 10;
2256
2257         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2258         if (onlyVisibleRect)
2259         {
2260             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2261             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2262         }
2263
2264         wxClientDC dc(this);
2265         dc.SetFont(GetFont());
2266
2267         PrepareDC(dc);
2268
2269         GetBuffer().Defragment();
2270         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2271         GetBuffer().Layout(dc, availableSpace, flags);
2272         GetBuffer().SetDirty(false);
2273
2274         if (!IsFrozen())
2275             SetupScrollbars();
2276     }
2277
2278     return true;
2279 }
2280
2281 /// Is all of the selection bold?
2282 bool wxRichTextCtrl::IsSelectionBold() const
2283 {
2284     if (HasSelection())
2285     {
2286         wxRichTextAttr attr;
2287         wxRichTextRange range = GetSelectionRange();
2288         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2289         attr.SetFontWeight(wxBOLD);
2290
2291         return HasCharacterAttributes(range, attr);
2292     }
2293     else
2294     {
2295         // If no selection, then we need to combine current style with default style
2296         // to see what the effect would be if we started typing.
2297         wxRichTextAttr attr;
2298         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2299         if (GetStyle(GetCaretPosition()+1, attr))
2300         {
2301             wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2302             return attr.GetFontWeight() == wxBOLD;
2303         }
2304     }
2305     return false;
2306 }
2307
2308 /// Is all of the selection italics?
2309 bool wxRichTextCtrl::IsSelectionItalics() const
2310 {
2311     if (HasSelection())
2312     {
2313         wxRichTextRange range = GetSelectionRange();
2314         wxRichTextAttr attr;
2315         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2316         attr.SetFontStyle(wxITALIC);
2317
2318         return HasCharacterAttributes(range, attr);
2319     }
2320     else
2321     {
2322         // If no selection, then we need to combine current style with default style
2323         // to see what the effect would be if we started typing.
2324         wxRichTextAttr attr;
2325         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2326         if (GetStyle(GetCaretPosition()+1, attr))
2327         {
2328             wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2329             return attr.GetFontStyle() == wxITALIC;
2330         }
2331     }
2332     return false;
2333 }
2334
2335 /// Is all of the selection underlined?
2336 bool wxRichTextCtrl::IsSelectionUnderlined() const
2337 {
2338     if (HasSelection())
2339     {
2340         wxRichTextRange range = GetSelectionRange();
2341         wxRichTextAttr attr;
2342         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2343         attr.SetFontUnderlined(true);
2344
2345         return HasCharacterAttributes(range, attr);
2346     }
2347     else
2348     {
2349         // If no selection, then we need to combine current style with default style
2350         // to see what the effect would be if we started typing.
2351         wxRichTextAttr attr;
2352         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2353         if (GetStyle(GetCaretPosition()+1, attr))
2354         {
2355             wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2356             return attr.GetFontUnderlined();
2357         }
2358     }
2359     return false;
2360 }
2361
2362 /// Apply bold to the selection
2363 bool wxRichTextCtrl::ApplyBoldToSelection()
2364 {
2365     wxRichTextAttr attr;
2366     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2367     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
2368
2369     if (HasSelection())
2370         return SetStyle(GetSelectionRange(), attr);
2371     else
2372         SetDefaultStyle(attr);
2373     return true;
2374 }
2375
2376 /// Apply italic to the selection
2377 bool wxRichTextCtrl::ApplyItalicToSelection()
2378 {
2379     wxRichTextAttr attr;
2380     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2381     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
2382
2383     if (HasSelection())
2384         return SetStyle(GetSelectionRange(), attr);
2385     else
2386         SetDefaultStyle(attr);
2387     return true;
2388 }
2389
2390 /// Apply underline to the selection
2391 bool wxRichTextCtrl::ApplyUnderlineToSelection()
2392 {
2393     wxRichTextAttr attr;
2394     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2395     attr.SetFontUnderlined(!IsSelectionUnderlined());
2396
2397     if (HasSelection())
2398         return SetStyle(GetSelectionRange(), attr);
2399     else
2400         SetDefaultStyle(attr);
2401     return true;
2402 }
2403
2404 /// Is all of the selection aligned according to the specified flag?
2405 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment) const
2406 {
2407     if (HasSelection())
2408     {
2409         wxRichTextRange range = GetSelectionRange();
2410         wxRichTextAttr attr;
2411         attr.SetAlignment(alignment);
2412
2413         return HasParagraphAttributes(range, attr);
2414     }
2415     else
2416     {
2417         // If no selection, then we need to get information from the current paragraph.
2418         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
2419         if (para)
2420             return para->GetAttributes().GetAlignment() == alignment;
2421     }
2422     return false;
2423 }
2424
2425 /// Apply alignment to the selection
2426 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
2427 {
2428     wxRichTextAttr attr;
2429     attr.SetAlignment(alignment);
2430     if (HasSelection())
2431         return SetStyle(GetSelectionRange(), attr);
2432     else
2433     {
2434         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
2435         if (para)
2436             return SetStyle(para->GetRange(), attr);
2437     }
2438     return true;
2439 }
2440
2441 /// Sets the default style to the style under the cursor
2442 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
2443 {
2444     wxTextAttrEx attr;
2445     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
2446
2447     if (GetStyle(GetCaretPosition(), attr))
2448     {
2449         SetDefaultStyle(attr);
2450         return true;
2451     }
2452     else
2453         return false;
2454 }
2455
2456 /// Returns the first visible position in the current view
2457 long wxRichTextCtrl::GetFirstVisiblePosition() const
2458 {
2459     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
2460     if (line)
2461         return line->GetAbsoluteRange().GetStart();
2462     else
2463         return 0;
2464 }
2465
2466 #endif
2467     // wxUSE_RICHTEXT
2468