src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richeditctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/textfile.h"
  30 #include "wx/ffile.h"
  31 #include "wx/filename.h"
  32 #include "wx/dcbuffer.h"
  33 #include "wx/arrimpl.cpp"
  34 #include "wx/fontenum.h"
  35
  36 // DLL options compatibility check:
  37 #include "wx/app.h"
  38 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  39
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_CLICK)
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RETURN)
  45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CHARACTER)
  46 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_DELETE)
  47
  48 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING)
  49 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED)
  50 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING)
  51 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED)
  52
  53 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED)
  54 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED)
  55 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED)
  56 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED)
  57
  58 IMPLEMENT_CLASS( wxRichTextCtrl, wxControl )
  59
  60 IMPLEMENT_CLASS( wxRichTextEvent, wxNotifyEvent )
  61
  62 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
  63     EVT_PAINT(wxRichTextCtrl::OnPaint)
  64     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
  65     EVT_IDLE(wxRichTextCtrl::OnIdle)
  66     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
  67     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
  68     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
  69     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
  70     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
  71     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
  72     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
  73     EVT_CHAR(wxRichTextCtrl::OnChar)
  74     EVT_SIZE(wxRichTextCtrl::OnSize)
  75     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
  76     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
  77     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
  78     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
  79
  80     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
  81     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
  82
  83     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
  84     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
  85
  86     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
  87     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
  88
  89     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
  90     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
  91
  92     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
  93     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
  94
  95     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
  96     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
  97
  98     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
  99     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 100 END_EVENT_TABLE()
 101
 102 /*!
 103  * wxRichTextCtrl
 104  */
 105
 106 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 107
 108 wxRichTextCtrl::wxRichTextCtrl()
 109               : wxScrollHelper(this)
 110 {
 111     Init();
 112 }
 113
 114 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 115                                wxWindowID id,
 116                                const wxString& value,
 117                                const wxPoint& pos,
 118                                const wxSize& size,
 119                                long style,
 120                                const wxValidator& validator,
 121                                const wxString& name)
 122               : wxScrollHelper(this)
 123 {
 124     Init();
 125     Create(parent, id, value, pos, size, style, validator, name);
 126 }
 127
 128 /// Creation
 129 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 130                              const wxValidator& validator, const wxString& name)
 131 {
 132         // Try to make this only necessary in 2.8
 133 #if 0
 134 #ifdef __WXMSW__
 135         if ((style & wxBORDER_MASK) == wxDEFAULT)
 136                 style |= wxBORDER_THEME;
 137 #endif
 138 #endif
 139
 140     if (!wxTextCtrlBase::Create(parent, id, pos, size,
 141                                 style|wxFULL_REPAINT_ON_RESIZE,
 142                                 validator, name))
 143         return false;
 144
 145     if (!GetFont().Ok())
 146     {
 147         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 148     }
 149
 150     GetBuffer().Reset();
 151     GetBuffer().SetRichTextCtrl(this);
 152
 153     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 154     GetCaret()->Show();
 155
 156     if (style & wxTE_READONLY)
 157         SetEditable(false);
 158
 159     // The base attributes must all have default values
 160     wxTextAttrEx attributes;
 161     attributes.SetFont(GetFont());
 162     attributes.SetTextColour(*wxBLACK);
 163     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 164     attributes.SetLineSpacing(10);
 165     attributes.SetParagraphSpacingAfter(10);
 166     attributes.SetParagraphSpacingBefore(0);
 167     attributes.SetTextEffects(0);
 168     attributes.SetTextEffectFlags(wxTEXT_ATTR_EFFECT_STRIKETHROUGH|wxTEXT_ATTR_EFFECT_CAPITALS);
 169
 170     SetBasicStyle(attributes);
 171
 172     // The default attributes will be merged with base attributes, so
 173     // can be empty to begin with
 174     wxTextAttrEx defaultAttributes;
 175     SetDefaultStyle(defaultAttributes);
 176
 177     SetBackgroundColour(*wxWHITE);
 178     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 179
 180     // Tell the sizers to use the given or best size
 181     SetInitialSize(size);
 182
 183 #if wxRICHTEXT_BUFFERED_PAINTING
 184     // Create a buffer
 185     RecreateBuffer(size);
 186 #endif
 187
 188     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 189     m_urlCursor = wxCursor(wxCURSOR_HAND);
 190
 191     SetCursor(m_textCursor);
 192
 193     if (!value.IsEmpty())
 194         SetValue(value);
 195
 196     GetBuffer().AddEventHandler(this);
 197
 198     return true;
 199 }
 200
 201 wxRichTextCtrl::~wxRichTextCtrl()
 202 {
 203     GetBuffer().RemoveEventHandler(this);
 204
 205     delete m_contextMenu;
 206 }
 207
 208 /// Member initialisation
 209 void wxRichTextCtrl::Init()
 210 {
 211     m_freezeCount = 0;
 212     m_contextMenu = NULL;
 213     m_caret = NULL;
 214     m_caretPosition = -1;
 215     m_selectionRange.SetRange(-2, -2);
 216     m_selectionAnchor = -2;
 217     m_editable = true;
 218     m_caretAtLineStart = false;
 219     m_dragging = false;
 220     m_fullLayoutRequired = false;
 221     m_fullLayoutTime = 0;
 222     m_fullLayoutSavedPosition = 0;
 223     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 224     m_caretPositionForDefaultStyle = -2;
 225 }
 226
 227 /// Call Freeze to prevent refresh
 228 void wxRichTextCtrl::Freeze()
 229 {
 230     m_freezeCount ++;
 231 }
 232
 233 /// Call Thaw to refresh
 234 void wxRichTextCtrl::Thaw()
 235 {
 236     m_freezeCount --;
 237
 238     if (m_freezeCount == 0)
 239     {
 240         SetupScrollbars();
 241         Refresh(false);
 242     }
 243 }
 244
 245 /// Clear all text
 246 void wxRichTextCtrl::Clear()
 247 {
 248     m_buffer.ResetAndClearCommands();
 249     m_buffer.SetDirty(true);
 250     m_caretPosition = -1;
 251     m_caretPositionForDefaultStyle = -2;
 252     m_caretAtLineStart = false;
 253     m_selectionRange.SetRange(-2, -2);
 254
 255     SetScrollbars(0, 0, 0, 0, 0, 0);
 256
 257     if (m_freezeCount == 0)
 258     {
 259         SetupScrollbars();
 260         Refresh(false);
 261     }
 262     SendTextUpdatedEvent();
 263 }
 264
 265 /// Painting
 266 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 267 {
 268     if (GetCaret() && GetCaret()->IsVisible())
 269         GetCaret()->Hide();
 270
 271     {
 272 #if wxRICHTEXT_BUFFERED_PAINTING
 273         wxBufferedPaintDC dc(this, m_bufferBitmap);
 274 #else
 275         wxPaintDC dc(this);
 276 #endif
 277         PrepareDC(dc);
 278
 279         if (m_freezeCount > 0)
 280             return;
 281
 282         dc.SetFont(GetFont());
 283
 284         // Paint the background
 285         PaintBackground(dc);
 286
 287         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 288
 289         wxRect drawingArea(GetUpdateRegion().GetBox());
 290         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 291
 292         wxRect availableSpace(GetClientSize());
 293         if (GetBuffer().GetDirty())
 294         {
 295             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 296             GetBuffer().SetDirty(false);
 297             SetupScrollbars();
 298         }
 299
 300         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 301     }
 302
 303     if (GetCaret() && !GetCaret()->IsVisible())
 304         GetCaret()->Show();
 305
 306     PositionCaret();
 307 }
 308
 309 // Empty implementation, to prevent flicker
 310 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 311 {
 312 }
 313
 314 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 315 {
 316     if (GetCaret())
 317     {
 318         if (!GetCaret()->IsVisible())
 319             GetCaret()->Show();
 320         PositionCaret();
 321     }
 322
 323     // if (!IsFrozen())
 324     //    Refresh(false);
 325 }
 326
 327 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 328 {
 329     if (GetCaret() && GetCaret()->IsVisible())
 330         GetCaret()->Hide();
 331
 332     // if (!IsFrozen())
 333     //    Refresh(false);
 334 }
 335
 336 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 337 {
 338     m_dragging = false;
 339 }
 340
 341 /// Left-click
 342 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 343 {
 344     SetFocus();
 345
 346     wxClientDC dc(this);
 347     PrepareDC(dc);
 348     dc.SetFont(GetFont());
 349
 350     long position = 0;
 351     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 352
 353     if (hit != wxRICHTEXT_HITTEST_NONE)
 354     {
 355         m_dragStart = event.GetLogicalPosition(dc);
 356         m_dragging = true;
 357         CaptureMouse();
 358
 359         SelectNone();
 360
 361         bool caretAtLineStart = false;
 362
 363         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 364         {
 365             // If we're at the start of a line (but not first in para)
 366             // then we should keep the caret showing at the start of the line
 367             // by showing the m_caretAtLineStart flag.
 368             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 369             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 370
 371             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 372                 caretAtLineStart = true;
 373             position --;
 374         }
 375
 376         MoveCaret(position, caretAtLineStart);
 377         SetDefaultStyleToCursorStyle();
 378     }
 379
 380     event.Skip();
 381 }
 382
 383 /// Left-up
 384 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 385 {
 386     if (m_dragging)
 387     {
 388         m_dragging = false;
 389         if (GetCapture() == this)
 390             ReleaseMouse();
 391
 392         // See if we clicked on a URL
 393         wxClientDC dc(this);
 394         PrepareDC(dc);
 395         dc.SetFont(GetFont());
 396
 397         long position = 0;
 398         wxPoint logicalPt = event.GetLogicalPosition(dc);
 399         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 400
 401         if (hit != wxRICHTEXT_HITTEST_NONE)
 402         {
 403             wxRichTextEvent cmdEvent(
 404                 wxEVT_COMMAND_RICHTEXT_LEFT_CLICK,
 405                 GetId());
 406             cmdEvent.SetEventObject(this);
 407             cmdEvent.SetPosition(m_caretPosition+1);
 408
 409             if (!GetEventHandler()->ProcessEvent(cmdEvent))
 410             {
 411                 wxTextAttrEx attr;
 412                 if (GetStyle(position, attr))
 413                 {
 414                     if (attr.HasFlag(wxTEXT_ATTR_URL))
 415                     {
 416                         wxString urlTarget = attr.GetURL();
 417                         if (!urlTarget.IsEmpty())
 418                         {
 419                             wxMouseEvent mouseEvent(event);
 420
 421                             long startPos = 0, endPos = 0;
 422                             wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 423                             if (obj)
 424                             {
 425                                 startPos = obj->GetRange().GetStart();
 426                                 endPos = obj->GetRange().GetEnd();
 427                             }
 428
 429                             wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 430                             InitCommandEvent(urlEvent);
 431
 432                             urlEvent.SetString(urlTarget);
 433
 434                             GetEventHandler()->ProcessEvent(urlEvent);
 435                         }
 436                     }
 437                 }
 438             }
 439         }
 440     }
 441 }
 442
 443 /// Left-click
 444 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 445 {
 446     wxClientDC dc(this);
 447     PrepareDC(dc);
 448     dc.SetFont(GetFont());
 449
 450     long position = 0;
 451     wxPoint logicalPt = event.GetLogicalPosition(dc);
 452     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 453
 454     // See if we need to change the cursor
 455
 456     {
 457         if (hit != wxRICHTEXT_HITTEST_NONE && !(hit & wxRICHTEXT_HITTEST_OUTSIDE))
 458         {
 459             wxTextAttrEx attr;
 460             if (GetStyle(position, attr))
 461             {
 462                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 463                 {
 464                     SetCursor(m_urlCursor);
 465                 }
 466                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 467                 {
 468                     SetCursor(m_textCursor);
 469                 }
 470             }
 471         }
 472         else
 473             SetCursor(m_textCursor);
 474     }
 475
 476     if (!event.Dragging())
 477     {
 478         event.Skip();
 479         return;
 480     }
 481
 482     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 483     {
 484         // TODO: test closeness
 485
 486         bool caretAtLineStart = false;
 487
 488         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 489         {
 490             // If we're at the start of a line (but not first in para)
 491             // then we should keep the caret showing at the start of the line
 492             // by showing the m_caretAtLineStart flag.
 493             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 494             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 495
 496             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 497                 caretAtLineStart = true;
 498             position --;
 499         }
 500
 501         if (m_caretPosition != position)
 502         {
 503             bool extendSel = ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 504
 505             MoveCaret(position, caretAtLineStart);
 506             SetDefaultStyleToCursorStyle();
 507
 508             if (extendSel)
 509                 Refresh(false);
 510         }
 511     }
 512 }
 513
 514 /// Right-click
 515 void wxRichTextCtrl::OnRightClick(wxMouseEvent& WXUNUSED(event))
 516 {
 517     SetFocus();
 518
 519     wxRichTextEvent cmdEvent(
 520         wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK,
 521         GetId());
 522     cmdEvent.SetEventObject(this);
 523     cmdEvent.SetPosition(m_caretPosition+1);
 524
 525     GetEventHandler()->ProcessEvent(cmdEvent);
 526 }
 527
 528 /// Left-double-click
 529 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& WXUNUSED(event))
 530 {
 531     wxRichTextEvent cmdEvent(
 532         wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK,
 533         GetId());
 534     cmdEvent.SetEventObject(this);
 535     cmdEvent.SetPosition(m_caretPosition+1);
 536
 537     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 538     {
 539         SelectWord(GetCaretPosition()+1);
 540     }
 541 }
 542
 543 /// Middle-click
 544 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 545 {
 546     wxRichTextEvent cmdEvent(
 547         wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK,
 548         GetId());
 549     cmdEvent.SetEventObject(this);
 550     cmdEvent.SetPosition(m_caretPosition+1);
 551
 552     if (!GetEventHandler()->ProcessEvent(cmdEvent))
 553         event.Skip();
 554 }
 555
 556 /// Key press
 557 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 558 {
 559     int flags = 0;
 560     if (event.CmdDown())
 561         flags |= wxRICHTEXT_CTRL_DOWN;
 562     if (event.ShiftDown())
 563         flags |= wxRICHTEXT_SHIFT_DOWN;
 564     if (event.AltDown())
 565         flags |= wxRICHTEXT_ALT_DOWN;
 566
 567     if (event.GetKeyCode() == WXK_LEFT ||
 568         event.GetKeyCode() == WXK_RIGHT ||
 569         event.GetKeyCode() == WXK_UP ||
 570         event.GetKeyCode() == WXK_DOWN ||
 571         event.GetKeyCode() == WXK_HOME ||
 572         event.GetKeyCode() == WXK_PAGEUP ||
 573         event.GetKeyCode() == WXK_PAGEDOWN ||
 574         event.GetKeyCode() == WXK_END ||
 575
 576         event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 577         event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 578         event.GetKeyCode() == WXK_NUMPAD_UP ||
 579         event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 580         event.GetKeyCode() == WXK_NUMPAD_HOME ||
 581         event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 582         event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 583         event.GetKeyCode() == WXK_NUMPAD_END)
 584     {
 585         KeyboardNavigate(event.GetKeyCode(), flags);
 586         return;
 587     }
 588
 589     // all the other keys modify the controls contents which shouldn't be
 590     // possible if we're read-only
 591     if ( !IsEditable() )
 592     {
 593         event.Skip();
 594         return;
 595     }
 596
 597     if (event.GetKeyCode() == WXK_RETURN)
 598     {
 599         BeginBatchUndo(_("Insert Text"));
 600
 601         long newPos = m_caretPosition;
 602
 603         DeleteSelectedContent(& newPos);
 604
 605         if (event.ShiftDown())
 606         {
 607             wxString text;
 608             text = wxRichTextLineBreakChar;
 609             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 610         }
 611         else
 612             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
 613
 614         EndBatchUndo();
 615         SetDefaultStyleToCursorStyle();
 616
 617         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 618
 619         wxRichTextEvent cmdEvent(
 620             wxEVT_COMMAND_RICHTEXT_RETURN,
 621             GetId());
 622         cmdEvent.SetEventObject(this);
 623         cmdEvent.SetFlags(flags);
 624         cmdEvent.SetPosition(newPos+1);
 625
 626         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 627         {
 628             // Generate conventional event
 629             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 630             InitCommandEvent(textEvent);
 631
 632             GetEventHandler()->ProcessEvent(textEvent);
 633         }
 634         Update();
 635     }
 636     else if (event.GetKeyCode() == WXK_BACK)
 637     {
 638         BeginBatchUndo(_("Delete Text"));
 639
 640         // Submit range in character positions, which are greater than caret positions,
 641         // so subtract 1 for deleted character and add 1 for conversion to character position.
 642         if (m_caretPosition > -1 && !HasSelection())
 643         {
 644             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition, m_caretPosition), this);
 645         }
 646         else
 647             DeleteSelectedContent();
 648
 649         EndBatchUndo();
 650
 651         if (GetLastPosition() == -1)
 652         {
 653             GetBuffer().Reset();
 654
 655             m_caretPosition = -1;
 656             PositionCaret();
 657             SetDefaultStyleToCursorStyle();
 658         }
 659
 660         ScrollIntoView(m_caretPosition, WXK_LEFT);
 661
 662         wxRichTextEvent cmdEvent(
 663             wxEVT_COMMAND_RICHTEXT_DELETE,
 664             GetId());
 665         cmdEvent.SetEventObject(this);
 666         cmdEvent.SetFlags(flags);
 667         cmdEvent.SetPosition(m_caretPosition+1);
 668         GetEventHandler()->ProcessEvent(cmdEvent);
 669
 670         Update();
 671     }
 672     else if (event.GetKeyCode() == WXK_DELETE)
 673     {
 674         BeginBatchUndo(_("Delete Text"));
 675
 676         // Submit range in character positions, which are greater than caret positions,
 677         if (m_caretPosition < GetBuffer().GetRange().GetEnd()+1 && !HasSelection())
 678         {
 679             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition+1, m_caretPosition+1), this);
 680         }
 681         else
 682             DeleteSelectedContent();
 683
 684         EndBatchUndo();
 685
 686         if (GetLastPosition() == -1)
 687         {
 688             GetBuffer().Reset();
 689
 690             m_caretPosition = -1;
 691             PositionCaret();
 692             SetDefaultStyleToCursorStyle();
 693         }
 694
 695         wxRichTextEvent cmdEvent(
 696             wxEVT_COMMAND_RICHTEXT_DELETE,
 697             GetId());
 698         cmdEvent.SetEventObject(this);
 699         cmdEvent.SetFlags(flags);
 700         cmdEvent.SetPosition(m_caretPosition+1);
 701         GetEventHandler()->ProcessEvent(cmdEvent);
 702
 703         Update();
 704     }
 705     else
 706     {
 707         long keycode = event.GetKeyCode();
 708         switch ( keycode )
 709         {
 710             case WXK_ESCAPE:
 711             case WXK_DELETE:
 712             case WXK_START:
 713             case WXK_LBUTTON:
 714             case WXK_RBUTTON:
 715             case WXK_CANCEL:
 716             case WXK_MBUTTON:
 717             case WXK_CLEAR:
 718             case WXK_SHIFT:
 719             case WXK_ALT:
 720             case WXK_CONTROL:
 721             case WXK_MENU:
 722             case WXK_PAUSE:
 723             case WXK_CAPITAL:
 724             case WXK_END:
 725             case WXK_HOME:
 726             case WXK_LEFT:
 727             case WXK_UP:
 728             case WXK_RIGHT:
 729             case WXK_DOWN:
 730             case WXK_SELECT:
 731             case WXK_PRINT:
 732             case WXK_EXECUTE:
 733             case WXK_SNAPSHOT:
 734             case WXK_INSERT:
 735             case WXK_HELP:
 736             case WXK_NUMPAD0:
 737             case WXK_NUMPAD1:
 738             case WXK_NUMPAD2:
 739             case WXK_NUMPAD3:
 740             case WXK_NUMPAD4:
 741             case WXK_NUMPAD5:
 742             case WXK_NUMPAD6:
 743             case WXK_NUMPAD7:
 744             case WXK_NUMPAD8:
 745             case WXK_NUMPAD9:
 746             case WXK_MULTIPLY:
 747             case WXK_ADD:
 748             case WXK_SEPARATOR:
 749             case WXK_SUBTRACT:
 750             case WXK_DECIMAL:
 751             case WXK_DIVIDE:
 752             case WXK_F1:
 753             case WXK_F2:
 754             case WXK_F3:
 755             case WXK_F4:
 756             case WXK_F5:
 757             case WXK_F6:
 758             case WXK_F7:
 759             case WXK_F8:
 760             case WXK_F9:
 761             case WXK_F10:
 762             case WXK_F11:
 763             case WXK_F12:
 764             case WXK_F13:
 765             case WXK_F14:
 766             case WXK_F15:
 767             case WXK_F16:
 768             case WXK_F17:
 769             case WXK_F18:
 770             case WXK_F19:
 771             case WXK_F20:
 772             case WXK_F21:
 773             case WXK_F22:
 774             case WXK_F23:
 775             case WXK_F24:
 776             case WXK_NUMLOCK:
 777             case WXK_SCROLL:
 778             case WXK_PAGEUP:
 779             case WXK_PAGEDOWN:
 780             case WXK_NUMPAD_SPACE:
 781             case WXK_NUMPAD_TAB:
 782             case WXK_NUMPAD_ENTER:
 783             case WXK_NUMPAD_F1:
 784             case WXK_NUMPAD_F2:
 785             case WXK_NUMPAD_F3:
 786             case WXK_NUMPAD_F4:
 787             case WXK_NUMPAD_HOME:
 788             case WXK_NUMPAD_LEFT:
 789             case WXK_NUMPAD_UP:
 790             case WXK_NUMPAD_RIGHT:
 791             case WXK_NUMPAD_DOWN:
 792             case WXK_NUMPAD_PAGEUP:
 793             case WXK_NUMPAD_PAGEDOWN:
 794             case WXK_NUMPAD_END:
 795             case WXK_NUMPAD_BEGIN:
 796             case WXK_NUMPAD_INSERT:
 797             case WXK_NUMPAD_DELETE:
 798             case WXK_NUMPAD_EQUAL:
 799             case WXK_NUMPAD_MULTIPLY:
 800             case WXK_NUMPAD_ADD:
 801             case WXK_NUMPAD_SEPARATOR:
 802             case WXK_NUMPAD_SUBTRACT:
 803             case WXK_NUMPAD_DECIMAL:
 804             case WXK_WINDOWS_LEFT:
 805             {
 806                 event.Skip();
 807                 return;
 808             }
 809
 810             default:
 811             {
 812                 if (event.CmdDown() || event.AltDown())
 813                 {
 814                     event.Skip();
 815                     return;
 816                 }
 817
 818                 wxRichTextEvent cmdEvent(
 819                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
 820                     GetId());
 821                 cmdEvent.SetEventObject(this);
 822                 cmdEvent.SetFlags(flags);
 823 #if wxUSE_UNICODE
 824                 cmdEvent.SetCharacter(event.GetUnicodeKey());
 825 #else
 826                 cmdEvent.SetCharacter((wxChar) keycode);
 827 #endif
 828                 cmdEvent.SetPosition(m_caretPosition+1);
 829
 830                 if (keycode == wxT('\t'))
 831                 {
 832                     // See if we need to promote or demote the selection or paragraph at the cursor
 833                     // position, instead of inserting a tab.
 834                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
 835                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
 836                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
 837                     {
 838                         wxRichTextRange range;
 839                         if (HasSelection())
 840                             range = GetSelectionRange();
 841                         else
 842                             range = para->GetRange().FromInternal();
 843
 844                         int promoteBy = event.ShiftDown() ? 1 : -1;
 845
 846                         PromoteList(promoteBy, range, NULL);
 847
 848                         GetEventHandler()->ProcessEvent(cmdEvent);
 849
 850                         return;
 851                     }
 852                 }
 853
 854                 BeginBatchUndo(_("Insert Text"));
 855
 856                 long newPos = m_caretPosition;
 857                 DeleteSelectedContent(& newPos);
 858
 859 #if wxUSE_UNICODE
 860                 wxString str = event.GetUnicodeKey();
 861 #else
 862                 wxString str = (wxChar) event.GetKeyCode();
 863 #endif
 864                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
 865
 866                 EndBatchUndo();
 867
 868                 SetDefaultStyleToCursorStyle();
 869                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
 870
 871                 GetEventHandler()->ProcessEvent(cmdEvent);
 872
 873                 Update();
 874             }
 875         }
 876     }
 877 }
 878
 879 /// Delete content if there is a selection, e.g. when pressing a key.
 880 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
 881 {
 882     if (HasSelection())
 883     {
 884         long pos = m_selectionRange.GetStart();
 885         GetBuffer().DeleteRangeWithUndo(m_selectionRange, this);
 886         m_selectionRange.SetRange(-2, -2);
 887
 888         if (newPos)
 889             *newPos = pos-1;
 890         return true;
 891     }
 892     else
 893         return false;
 894 }
 895
 896 /// Keyboard navigation
 897
 898 /*
 899
 900 Left:       left one character
 901 Right:      right one character
 902 Up:         up one line
 903 Down:       down one line
 904 Ctrl-Left:  left one word
 905 Ctrl-Right: right one word
 906 Ctrl-Up:    previous paragraph start
 907 Ctrl-Down:  next start of paragraph
 908 Home:       start of line
 909 End:        end of line
 910 Ctrl-Home:  start of document
 911 Ctrl-End:   end of document
 912 Page-Up:    Up a screen
 913 Page-Down:  Down a screen
 914
 915 Maybe:
 916
 917 Ctrl-Alt-PgUp: Start of window
 918 Ctrl-Alt-PgDn: End of window
 919 F8:         Start selection mode
 920 Esc:        End selection mode
 921
 922 Adding Shift does the above but starts/extends selection.
 923
 924
 925  */
 926
 927 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
 928 {
 929     bool success = false;
 930
 931     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
 932     {
 933         if (flags & wxRICHTEXT_CTRL_DOWN)
 934             success = WordRight(1, flags);
 935         else
 936             success = MoveRight(1, flags);
 937     }
 938     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
 939     {
 940         if (flags & wxRICHTEXT_CTRL_DOWN)
 941             success = WordLeft(1, flags);
 942         else
 943             success = MoveLeft(1, flags);
 944     }
 945     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
 946     {
 947         if (flags & wxRICHTEXT_CTRL_DOWN)
 948             success = MoveToParagraphStart(flags);
 949         else
 950             success = MoveUp(1, flags);
 951     }
 952     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
 953     {
 954         if (flags & wxRICHTEXT_CTRL_DOWN)
 955             success = MoveToParagraphEnd(flags);
 956         else
 957             success = MoveDown(1, flags);
 958     }
 959     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
 960     {
 961         success = PageUp(1, flags);
 962     }
 963     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
 964     {
 965         success = PageDown(1, flags);
 966     }
 967     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
 968     {
 969         if (flags & wxRICHTEXT_CTRL_DOWN)
 970             success = MoveHome(flags);
 971         else
 972             success = MoveToLineStart(flags);
 973     }
 974     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
 975     {
 976         if (flags & wxRICHTEXT_CTRL_DOWN)
 977             success = MoveEnd(flags);
 978         else
 979             success = MoveToLineEnd(flags);
 980     }
 981
 982     if (success)
 983     {
 984         ScrollIntoView(m_caretPosition, keyCode);
 985         SetDefaultStyleToCursorStyle();
 986     }
 987
 988     return success;
 989 }
 990
 991 /// Extend the selection. Selections are in caret positions.
 992 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
 993 {
 994     if (flags & wxRICHTEXT_SHIFT_DOWN)
 995     {
 996         // If not currently selecting, start selecting
 997         if (m_selectionRange.GetStart() == -2)
 998         {
 999             m_selectionAnchor = oldPos;
1000
1001             if (oldPos > newPos)
1002                 m_selectionRange.SetRange(newPos+1, oldPos);
1003             else
1004                 m_selectionRange.SetRange(oldPos+1, newPos);
1005         }
1006         else
1007         {
1008             // Always ensure that the selection range start is greater than
1009             // the end.
1010             if (newPos > m_selectionAnchor)
1011                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
1012             else
1013                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
1014         }
1015
1016         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
1017         {
1018             wxLogDebug(wxT("Strange selection range"));
1019         }
1020
1021         return true;
1022     }
1023     else
1024         return false;
1025 }
1026
1027 /// Scroll into view, returning true if we scrolled.
1028 /// This takes a _caret_ position.
1029 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
1030 {
1031     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
1032
1033     if (!line)
1034         return false;
1035
1036     int ppuX, ppuY;
1037     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1038
1039     int startXUnits, startYUnits;
1040     GetViewStart(& startXUnits, & startYUnits);
1041     int startY = startYUnits * ppuY;
1042
1043     int sx = 0, sy = 0;
1044     GetVirtualSize(& sx, & sy);
1045     int sxUnits = 0;
1046     int syUnits = 0;
1047     if (ppuY != 0)
1048         syUnits = sy/ppuY;
1049
1050     wxRect rect = line->GetRect();
1051
1052     bool scrolled = false;
1053
1054     wxSize clientSize = GetClientSize();
1055
1056     // Going down
1057     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1058         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT ||
1059         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1060         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1061     {
1062         if ((rect.y + rect.height) > (clientSize.y + startY))
1063         {
1064             // Make it scroll so this item is at the bottom
1065             // of the window
1066             int y = rect.y - (clientSize.y - rect.height);
1067             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1068
1069             // If we're still off the screen, scroll another line down
1070             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1071                 yUnits ++;
1072
1073             if (startYUnits != yUnits)
1074             {
1075                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1076                 scrolled = true;
1077             }
1078         }
1079         else if (rect.y < startY)
1080         {
1081             // Make it scroll so this item is at the top
1082             // of the window
1083             int y = rect.y ;
1084             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1085
1086             if (startYUnits != yUnits)
1087             {
1088                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1089                 scrolled = true;
1090             }
1091         }
1092     }
1093     // Going up
1094     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1095              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1096              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1097              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1098     {
1099         if (rect.y < startY)
1100         {
1101             // Make it scroll so this item is at the top
1102             // of the window
1103             int y = rect.y ;
1104             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1105
1106             if (startYUnits != yUnits)
1107             {
1108                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1109                 scrolled = true;
1110             }
1111         }
1112         else if ((rect.y + rect.height) > (clientSize.y + startY))
1113         {
1114             // Make it scroll so this item is at the bottom
1115             // of the window
1116             int y = rect.y - (clientSize.y - rect.height);
1117             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1118
1119             // If we're still off the screen, scroll another line down
1120             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1121                 yUnits ++;
1122
1123             if (startYUnits != yUnits)
1124             {
1125                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1126                 scrolled = true;
1127             }
1128         }
1129     }
1130     PositionCaret();
1131
1132     return scrolled;
1133 }
1134
1135 /// Is the given position visible on the screen?
1136 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1137 {
1138     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1139
1140     if (!line)
1141         return false;
1142
1143     int ppuX, ppuY;
1144     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1145
1146     int startX, startY;
1147     GetViewStart(& startX, & startY);
1148     startX = 0;
1149     startY = startY * ppuY;
1150
1151     int sx = 0, sy = 0;
1152     GetVirtualSize(& sx, & sy);
1153     sx = 0;
1154     if (ppuY != 0)
1155         sy = sy/ppuY;
1156
1157     wxRect rect = line->GetRect();
1158
1159     wxSize clientSize = GetClientSize();
1160
1161     return !(((rect.y + rect.height) > (clientSize.y + startY)) || rect.y < startY);
1162 }
1163
1164 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1165 {
1166     m_caretPosition = position;
1167     m_caretAtLineStart = showAtLineStart;
1168 }
1169
1170 /// Move caret one visual step forward: this may mean setting a flag
1171 /// and keeping the same position if we're going from the end of one line
1172 /// to the start of the next, which may be the exact same caret position.
1173 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1174 {
1175     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1176
1177     // Only do the check if we're not at the end of the paragraph (where things work OK
1178     // anyway)
1179     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1180     {
1181         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1182
1183         if (line)
1184         {
1185             wxRichTextRange lineRange = line->GetAbsoluteRange();
1186
1187             // We're at the end of a line. See whether we need to
1188             // stay at the same actual caret position but change visual
1189             // position, or not.
1190             if (oldPosition == lineRange.GetEnd())
1191             {
1192                 if (m_caretAtLineStart)
1193                 {
1194                     // We're already at the start of the line, so actually move on now.
1195                     m_caretPosition = oldPosition + 1;
1196                     m_caretAtLineStart = false;
1197                 }
1198                 else
1199                 {
1200                     // We're showing at the end of the line, so keep to
1201                     // the same position but indicate that we're to show
1202                     // at the start of the next line.
1203                     m_caretPosition = oldPosition;
1204                     m_caretAtLineStart = true;
1205                 }
1206                 SetDefaultStyleToCursorStyle();
1207                 return;
1208             }
1209         }
1210     }
1211     m_caretPosition ++;
1212     SetDefaultStyleToCursorStyle();
1213 }
1214
1215 /// Move caret one visual step backward: this may mean setting a flag
1216 /// and keeping the same position if we're going from the end of one line
1217 /// to the start of the next, which may be the exact same caret position.
1218 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1219 {
1220     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1221
1222     // Only do the check if we're not at the start of the paragraph (where things work OK
1223     // anyway)
1224     if (para && (oldPosition != para->GetRange().GetStart()))
1225     {
1226         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1227
1228         if (line)
1229         {
1230             wxRichTextRange lineRange = line->GetAbsoluteRange();
1231
1232             // We're at the start of a line. See whether we need to
1233             // stay at the same actual caret position but change visual
1234             // position, or not.
1235             if (oldPosition == lineRange.GetStart())
1236             {
1237                 m_caretPosition = oldPosition-1;
1238                 m_caretAtLineStart = true;
1239                 return;
1240             }
1241             else if (oldPosition == lineRange.GetEnd())
1242             {
1243                 if (m_caretAtLineStart)
1244                 {
1245                     // We're at the start of the line, so keep the same caret position
1246                     // but clear the start-of-line flag.
1247                     m_caretPosition = oldPosition;
1248                     m_caretAtLineStart = false;
1249                 }
1250                 else
1251                 {
1252                     // We're showing at the end of the line, so go back
1253                     // to the previous character position.
1254                     m_caretPosition = oldPosition - 1;
1255                 }
1256                 SetDefaultStyleToCursorStyle();
1257                 return;
1258             }
1259         }
1260     }
1261     m_caretPosition --;
1262     SetDefaultStyleToCursorStyle();
1263 }
1264
1265 /// Move right
1266 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1267 {
1268     long endPos = GetBuffer().GetRange().GetEnd();
1269
1270     if (m_caretPosition + noPositions < endPos)
1271     {
1272         long oldPos = m_caretPosition;
1273         long newPos = m_caretPosition + noPositions;
1274
1275         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1276         if (!extendSel)
1277             SelectNone();
1278
1279         // Determine by looking at oldPos and m_caretPosition whether
1280         // we moved from the end of a line to the start of the next line, in which case
1281         // we want to adjust the caret position such that it is positioned at the
1282         // start of the next line, rather than jumping past the first character of the
1283         // line.
1284         if (noPositions == 1 && !extendSel)
1285             MoveCaretForward(oldPos);
1286         else
1287             SetCaretPosition(newPos);
1288
1289         PositionCaret();
1290         SetDefaultStyleToCursorStyle();
1291
1292         if (extendSel)
1293             Refresh(false);
1294         return true;
1295     }
1296     else
1297         return false;
1298 }
1299
1300 /// Move left
1301 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1302 {
1303     long startPos = -1;
1304
1305     if (m_caretPosition > startPos - noPositions + 1)
1306     {
1307         long oldPos = m_caretPosition;
1308         long newPos = m_caretPosition - noPositions;
1309         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1310         if (!extendSel)
1311             SelectNone();
1312
1313         if (noPositions == 1 && !extendSel)
1314             MoveCaretBack(oldPos);
1315         else
1316             SetCaretPosition(newPos);
1317
1318         PositionCaret();
1319         SetDefaultStyleToCursorStyle();
1320
1321         if (extendSel)
1322             Refresh(false);
1323         return true;
1324     }
1325     else
1326         return false;
1327 }
1328
1329 /// Move up
1330 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1331 {
1332     return MoveDown(- noLines, flags);
1333 }
1334
1335 /// Move up
1336 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1337 {
1338     if (!GetCaret())
1339         return false;
1340
1341     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1342     wxPoint pt = GetCaret()->GetPosition();
1343     long newLine = lineNumber + noLines;
1344
1345     if (lineNumber != -1)
1346     {
1347         if (noLines > 0)
1348         {
1349             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1350
1351             if (newLine > lastLine)
1352                 return false;
1353         }
1354         else
1355         {
1356             if (newLine < 0)
1357                 return false;
1358         }
1359     }
1360
1361     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1362     if (lineObj)
1363     {
1364         pt.y = lineObj->GetAbsolutePosition().y + 2;
1365     }
1366     else
1367         return false;
1368
1369     long newPos = 0;
1370     wxClientDC dc(this);
1371     PrepareDC(dc);
1372     dc.SetFont(GetFont());
1373
1374     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1375
1376     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1377     {
1378         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1379         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1380         // so we view the caret at the start of the line.
1381         bool caretLineStart = false;
1382         if (hitTest & wxRICHTEXT_HITTEST_BEFORE)
1383         {
1384             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1385             wxRichTextRange lineRange;
1386             if (thisLine)
1387                 lineRange = thisLine->GetAbsoluteRange();
1388
1389             if (thisLine && (newPos-1) == lineRange.GetEnd())
1390             {
1391                 newPos --;
1392                 caretLineStart = true;
1393             }
1394             else
1395             {
1396                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1397                 if (para && para->GetRange().GetStart() == newPos)
1398                     newPos --;
1399             }
1400         }
1401
1402         long newSelEnd = newPos;
1403
1404         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1405         if (!extendSel)
1406             SelectNone();
1407
1408         SetCaretPosition(newPos, caretLineStart);
1409         PositionCaret();
1410         SetDefaultStyleToCursorStyle();
1411
1412         if (extendSel)
1413             Refresh(false);
1414         return true;
1415     }
1416
1417     return false;
1418 }
1419
1420 /// Move to the end of the paragraph
1421 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1422 {
1423     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1424     if (para)
1425     {
1426         long newPos = para->GetRange().GetEnd() - 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 start of the paragraph
1444 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1445 {
1446     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1447     if (para)
1448     {
1449         long newPos = para->GetRange().GetStart() - 1;
1450         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1451         if (!extendSel)
1452             SelectNone();
1453
1454         SetCaretPosition(newPos);
1455         PositionCaret();
1456         SetDefaultStyleToCursorStyle();
1457
1458         if (extendSel)
1459             Refresh(false);
1460         return true;
1461     }
1462
1463     return false;
1464 }
1465
1466 /// Move to the end of the line
1467 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1468 {
1469     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1470
1471     if (line)
1472     {
1473         wxRichTextRange lineRange = line->GetAbsoluteRange();
1474         long newPos = lineRange.GetEnd();
1475         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1476         if (!extendSel)
1477             SelectNone();
1478
1479         SetCaretPosition(newPos);
1480         PositionCaret();
1481         SetDefaultStyleToCursorStyle();
1482
1483         if (extendSel)
1484             Refresh(false);
1485         return true;
1486     }
1487
1488     return false;
1489 }
1490
1491 /// Move to the start of the line
1492 bool wxRichTextCtrl::MoveToLineStart(int flags)
1493 {
1494     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1495     if (line)
1496     {
1497         wxRichTextRange lineRange = line->GetAbsoluteRange();
1498         long newPos = lineRange.GetStart()-1;
1499
1500         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1501         if (!extendSel)
1502             SelectNone();
1503
1504         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1505
1506         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1507         PositionCaret();
1508         SetDefaultStyleToCursorStyle();
1509
1510         if (extendSel)
1511             Refresh(false);
1512         return true;
1513     }
1514
1515     return false;
1516 }
1517
1518 /// Move to the start of the buffer
1519 bool wxRichTextCtrl::MoveHome(int flags)
1520 {
1521     if (m_caretPosition != -1)
1522     {
1523         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1524         if (!extendSel)
1525             SelectNone();
1526
1527         SetCaretPosition(-1);
1528         PositionCaret();
1529         SetDefaultStyleToCursorStyle();
1530
1531         if (extendSel)
1532             Refresh(false);
1533         return true;
1534     }
1535     else
1536         return false;
1537 }
1538
1539 /// Move to the end of the buffer
1540 bool wxRichTextCtrl::MoveEnd(int flags)
1541 {
1542     long endPos = GetBuffer().GetRange().GetEnd()-1;
1543
1544     if (m_caretPosition != endPos)
1545     {
1546         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1547         if (!extendSel)
1548             SelectNone();
1549
1550         SetCaretPosition(endPos);
1551         PositionCaret();
1552         SetDefaultStyleToCursorStyle();
1553
1554         if (extendSel)
1555             Refresh(false);
1556         return true;
1557     }
1558     else
1559         return false;
1560 }
1561
1562 /// Move noPages pages up
1563 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1564 {
1565     return PageDown(- noPages, flags);
1566 }
1567
1568 /// Move noPages pages down
1569 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1570 {
1571     // Calculate which line occurs noPages * screen height further down.
1572     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1573     if (line)
1574     {
1575         wxSize clientSize = GetClientSize();
1576         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1577
1578         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1579         if (newLine)
1580         {
1581             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1582             long pos = lineRange.GetStart()-1;
1583             if (pos != m_caretPosition)
1584             {
1585                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1586
1587                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1588                 if (!extendSel)
1589                     SelectNone();
1590
1591                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1592                 PositionCaret();
1593                 SetDefaultStyleToCursorStyle();
1594
1595                 if (extendSel)
1596                     Refresh(false);
1597                 return true;
1598             }
1599         }
1600     }
1601
1602     return false;
1603 }
1604
1605 static bool wxRichTextCtrlIsWhitespace(const wxString& str)
1606 {
1607     return str == wxT(" ") || str == wxT("\t");
1608 }
1609
1610 // Finds the caret position for the next word
1611 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1612 {
1613     long endPos = GetBuffer().GetRange().GetEnd();
1614
1615     if (direction > 0)
1616     {
1617         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1618
1619         // First skip current text to space
1620         while (i < endPos && i > -1)
1621         {
1622             // i is in character, not caret positions
1623             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1624             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1625             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1626             {
1627                 break;
1628             }
1629             else if (!wxRichTextCtrlIsWhitespace(text) && !text.empty())
1630                 i += direction;
1631             else
1632             {
1633                 break;
1634             }
1635         }
1636         while (i < endPos && i > -1)
1637         {
1638             // i is in character, not caret positions
1639             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1640             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1641             if (line && (i == line->GetAbsoluteRange().GetEnd()))
1642                 return wxMax(-1, i);
1643
1644             if (text.empty()) // End of paragraph, or maybe an image
1645                 return wxMax(-1, i - 1);
1646             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1647                 i += direction;
1648             else
1649             {
1650                 // Convert to caret position
1651                 return wxMax(-1, i - 1);
1652             }
1653         }
1654         if (i >= endPos)
1655             return endPos-1;
1656         return i-1;
1657     }
1658     else
1659     {
1660         long i = m_caretPosition;
1661
1662         // First skip white space
1663         while (i < endPos && i > -1)
1664         {
1665             // i is in character, not caret positions
1666             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1667             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1668
1669             if (text.empty() || (line && (i == line->GetAbsoluteRange().GetStart()))) // End of paragraph, or maybe an image
1670                 break;
1671             else if (wxRichTextCtrlIsWhitespace(text) || text.empty())
1672                 i += direction;
1673             else
1674                 break;
1675         }
1676         // Next skip current text to space
1677         while (i < endPos && i > -1)
1678         {
1679             // i is in character, not caret positions
1680             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1681             wxRichTextLine* line = GetBuffer().GetLineAtPosition(i, false);
1682             if (line && line->GetAbsoluteRange().GetStart() == i)
1683                 return i-1;
1684
1685             if (!wxRichTextCtrlIsWhitespace(text) /* && !text.empty() */)
1686                 i += direction;
1687             else
1688             {
1689                 return i;
1690             }
1691         }
1692         if (i < -1)
1693             return -1;
1694         return i;
1695     }
1696 }
1697
1698 /// Move n words left
1699 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1700 {
1701     long pos = FindNextWordPosition(-1);
1702     if (pos != m_caretPosition)
1703     {
1704         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1705
1706         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1707         if (!extendSel)
1708             SelectNone();
1709
1710         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1711         PositionCaret();
1712         SetDefaultStyleToCursorStyle();
1713
1714         if (extendSel)
1715             Refresh(false);
1716         return true;
1717     }
1718
1719     return false;
1720 }
1721
1722 /// Move n words right
1723 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1724 {
1725     long pos = FindNextWordPosition(1);
1726     if (pos != m_caretPosition)
1727     {
1728         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1729
1730         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1731         if (!extendSel)
1732             SelectNone();
1733
1734         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1735         PositionCaret();
1736         SetDefaultStyleToCursorStyle();
1737
1738         if (extendSel)
1739             Refresh(false);
1740         return true;
1741     }
1742
1743     return false;
1744 }
1745
1746 /// Sizing
1747 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1748 {
1749     // Only do sizing optimization for large buffers
1750     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1751     {
1752         m_fullLayoutRequired = true;
1753         m_fullLayoutTime = wxGetLocalTimeMillis();
1754         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1755         LayoutContent(true /* onlyVisibleRect */);
1756     }
1757     else
1758         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1759
1760 #if wxRICHTEXT_BUFFERED_PAINTING
1761     RecreateBuffer();
1762 #endif
1763
1764     event.Skip();
1765 }
1766
1767
1768 /// Idle-time processing
1769 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1770 {
1771     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1772
1773     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1774     {
1775         m_fullLayoutRequired = false;
1776         m_fullLayoutTime = 0;
1777         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1778         ShowPosition(m_fullLayoutSavedPosition);
1779         Refresh(false);
1780     }
1781
1782     if (m_caretPositionForDefaultStyle != -2)
1783     {
1784         // If the caret position has changed, no longer reflect the default style
1785         // in the UI.
1786         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1787             m_caretPositionForDefaultStyle = -2;
1788     }
1789
1790     event.Skip();
1791 }
1792
1793 /// Scrolling
1794 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1795 {
1796     // Not used
1797     event.Skip();
1798 }
1799
1800 /// Set up scrollbars, e.g. after a resize
1801 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1802 {
1803     if (m_freezeCount)
1804         return;
1805
1806     if (GetBuffer().IsEmpty())
1807     {
1808         SetScrollbars(0, 0, 0, 0, 0, 0);
1809         return;
1810     }
1811
1812     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1813     // of pixels. See e.g. wxVScrolledWindow for ideas.
1814     int pixelsPerUnit = 5;
1815     wxSize clientSize = GetClientSize();
1816
1817     int maxHeight = GetBuffer().GetCachedSize().y;
1818
1819     // Round up so we have at least maxHeight pixels
1820     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1821
1822     int startX = 0, startY = 0;
1823     if (!atTop)
1824         GetViewStart(& startX, & startY);
1825
1826     int maxPositionX = 0; // wxMax(sz.x - clientSize.x, 0);
1827     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
1828
1829     // Move to previous scroll position if
1830     // possible
1831     SetScrollbars(0, pixelsPerUnit,
1832         0, unitsY,
1833         wxMin(maxPositionX, startX), wxMin(maxPositionY, startY));
1834 }
1835
1836 /// Paint the background
1837 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1838 {
1839     wxColour backgroundColour = GetBackgroundColour();
1840     if (!backgroundColour.Ok())
1841         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1842
1843     // Clear the background
1844     dc.SetBrush(wxBrush(backgroundColour));
1845     dc.SetPen(*wxTRANSPARENT_PEN);
1846     wxRect windowRect(GetClientSize());
1847     windowRect.x -= 2; windowRect.y -= 2;
1848     windowRect.width += 4; windowRect.height += 4;
1849
1850     // We need to shift the rectangle to take into account
1851     // scrolling. Converting device to logical coordinates.
1852     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1853     dc.DrawRectangle(windowRect);
1854 }
1855
1856 #if wxRICHTEXT_BUFFERED_PAINTING
1857 /// Recreate buffer bitmap if necessary
1858 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1859 {
1860     wxSize sz = size;
1861     if (sz == wxDefaultSize)
1862         sz = GetClientSize();
1863
1864     if (sz.x < 1 || sz.y < 1)
1865         return false;
1866
1867     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1868         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1869     return m_bufferBitmap.Ok();
1870 }
1871 #endif
1872
1873 // ----------------------------------------------------------------------------
1874 // file IO functions
1875 // ----------------------------------------------------------------------------
1876
1877 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
1878 {
1879     bool success = GetBuffer().LoadFile(filename, fileType);
1880     if (success)
1881         m_filename = filename;
1882
1883     DiscardEdits();
1884     SetInsertionPoint(0);
1885     LayoutContent();
1886     PositionCaret();
1887     SetupScrollbars(true);
1888     Refresh(false);
1889     SendTextUpdatedEvent();
1890
1891     if (success)
1892         return true;
1893     else
1894     {
1895         wxLogError(_("File couldn't be loaded."));
1896
1897         return false;
1898     }
1899 }
1900
1901 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
1902 {
1903     if (GetBuffer().SaveFile(filename, fileType))
1904     {
1905         m_filename = filename;
1906
1907         DiscardEdits();
1908
1909         return true;
1910     }
1911
1912     wxLogError(_("The text couldn't be saved."));
1913
1914     return false;
1915 }
1916
1917 // ----------------------------------------------------------------------------
1918 // wxRichTextCtrl specific functionality
1919 // ----------------------------------------------------------------------------
1920
1921 /// Add a new paragraph of text to the end of the buffer
1922 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
1923 {
1924     return GetBuffer().AddParagraph(text);
1925 }
1926
1927 /// Add an image
1928 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
1929 {
1930     return GetBuffer().AddImage(image);
1931 }
1932
1933 // ----------------------------------------------------------------------------
1934 // selection and ranges
1935 // ----------------------------------------------------------------------------
1936
1937 void wxRichTextCtrl::SelectAll()
1938 {
1939     SetSelection(0, GetLastPosition()+1);
1940     m_selectionAnchor = -1;
1941 }
1942
1943 /// Select none
1944 void wxRichTextCtrl::SelectNone()
1945 {
1946     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
1947         SetSelection(-2, -2);
1948     m_selectionAnchor = -2;
1949 }
1950
1951 static bool wxIsWordDelimiter(const wxString& text)
1952 {
1953     return !text.IsEmpty() && !wxIsalnum(text[0]);
1954 }
1955
1956 /// Select the word at the given character position
1957 bool wxRichTextCtrl::SelectWord(long position)
1958 {
1959     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
1960         return false;
1961
1962     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
1963     if (!para)
1964         return false;
1965
1966     long positionStart = position;
1967     long positionEnd = position;
1968
1969     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
1970     {
1971         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
1972         if (wxIsWordDelimiter(text))
1973         {
1974             positionStart ++;
1975             break;
1976         }
1977     }
1978     if (positionStart < para->GetRange().GetStart())
1979         positionStart = para->GetRange().GetStart();
1980
1981     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
1982     {
1983         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
1984         if (wxIsWordDelimiter(text))
1985         {
1986             positionEnd --;
1987             break;
1988         }
1989     }
1990     if (positionEnd >= para->GetRange().GetEnd())
1991         positionEnd = para->GetRange().GetEnd();
1992
1993     SetSelection(positionStart, positionEnd+1);
1994
1995     if (positionStart >= 0)
1996     {
1997         MoveCaret(positionStart-1, true);
1998         SetDefaultStyleToCursorStyle();
1999     }
2000
2001     return true;
2002 }
2003
2004 wxString wxRichTextCtrl::GetStringSelection() const
2005 {
2006     long from, to;
2007     GetSelection(&from, &to);
2008
2009     return GetRange(from, to);
2010 }
2011
2012 // ----------------------------------------------------------------------------
2013 // hit testing
2014 // ----------------------------------------------------------------------------
2015
2016 wxTextCtrlHitTestResult
2017 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
2018 {
2019     // implement in terms of the other overload as the native ports typically
2020     // can get the position and not (x, y) pair directly (although wxUniv
2021     // directly gets x and y -- and so overrides this method as well)
2022     long pos;
2023     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
2024
2025     if ( rc != wxTE_HT_UNKNOWN )
2026     {
2027         PositionToXY(pos, x, y);
2028     }
2029
2030     return rc;
2031 }
2032
2033 wxTextCtrlHitTestResult
2034 wxRichTextCtrl::HitTest(const wxPoint& pt,
2035                         long * pos) const
2036 {
2037     wxClientDC dc((wxRichTextCtrl*) this);
2038     ((wxRichTextCtrl*)this)->PrepareDC(dc);
2039
2040     // Buffer uses logical position (relative to start of buffer)
2041     // so convert
2042     wxPoint pt2 = GetLogicalPoint(pt);
2043
2044     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
2045
2046     if ((hit & wxRICHTEXT_HITTEST_BEFORE) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2047         return wxTE_HT_BEFORE;
2048     else if ((hit & wxRICHTEXT_HITTEST_AFTER) && (hit & wxRICHTEXT_HITTEST_OUTSIDE))
2049         return wxTE_HT_BEYOND;
2050     else if (hit & (wxRICHTEXT_HITTEST_BEFORE|wxRICHTEXT_HITTEST_AFTER))
2051         return wxTE_HT_ON_TEXT;
2052
2053     return wxTE_HT_UNKNOWN;
2054 }
2055
2056 // ----------------------------------------------------------------------------
2057 // set/get the controls text
2058 // ----------------------------------------------------------------------------
2059
2060 wxString wxRichTextCtrl::GetValue() const
2061 {
2062     return GetBuffer().GetText();
2063 }
2064
2065 wxString wxRichTextCtrl::GetRange(long from, long to) const
2066 {
2067     // Public API for range is different from internals
2068     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2069 }
2070
2071 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2072 {
2073     Clear();
2074
2075     if (!value.IsEmpty())
2076     {
2077         // Remove empty paragraph
2078         GetBuffer().Clear();
2079         DoWriteText(value);
2080
2081         // for compatibility, don't move the cursor when doing SetValue()
2082         SetInsertionPoint(0);
2083     }
2084     else
2085     {
2086         // still send an event for consistency
2087         if (flags & SetValue_SendEvent)
2088             SendTextUpdatedEvent();
2089     }
2090     DiscardEdits();
2091 }
2092
2093 void wxRichTextCtrl::WriteText(const wxString& value)
2094 {
2095     DoWriteText(value);
2096 }
2097
2098 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2099 {
2100     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2101
2102     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2103
2104     if ( flags & SetValue_SendEvent )
2105         SendTextUpdatedEvent();
2106 }
2107
2108 void wxRichTextCtrl::AppendText(const wxString& text)
2109 {
2110     SetInsertionPointEnd();
2111
2112     WriteText(text);
2113 }
2114
2115 /// Write an image at the current insertion point
2116 bool wxRichTextCtrl::WriteImage(const wxImage& image, int bitmapType)
2117 {
2118     wxRichTextImageBlock imageBlock;
2119
2120     wxImage image2 = image;
2121     if (imageBlock.MakeImageBlock(image2, bitmapType))
2122         return WriteImage(imageBlock);
2123
2124     return false;
2125 }
2126
2127 bool wxRichTextCtrl::WriteImage(const wxString& filename, int bitmapType)
2128 {
2129     wxRichTextImageBlock imageBlock;
2130
2131     wxImage image;
2132     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2133         return WriteImage(imageBlock);
2134
2135     return false;
2136 }
2137
2138 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2139 {
2140     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2141 }
2142
2143 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, int bitmapType)
2144 {
2145     if (bitmap.Ok())
2146     {
2147         wxRichTextImageBlock imageBlock;
2148
2149         wxImage image = bitmap.ConvertToImage();
2150         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2151             return WriteImage(imageBlock);
2152     }
2153
2154     return false;
2155 }
2156
2157 /// Insert a newline (actually paragraph) at the current insertion point.
2158 bool wxRichTextCtrl::Newline()
2159 {
2160     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
2161 }
2162
2163 /// Insert a line break at the current insertion point.
2164 bool wxRichTextCtrl::LineBreak()
2165 {
2166     wxString text;
2167     text = wxRichTextLineBreakChar;
2168     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2169 }
2170
2171 // ----------------------------------------------------------------------------
2172 // Clipboard operations
2173 // ----------------------------------------------------------------------------
2174
2175 void wxRichTextCtrl::Copy()
2176 {
2177     if (CanCopy())
2178     {
2179         wxRichTextRange range = GetInternalSelectionRange();
2180         GetBuffer().CopyToClipboard(range);
2181     }
2182 }
2183
2184 void wxRichTextCtrl::Cut()
2185 {
2186     if (CanCut())
2187     {
2188         wxRichTextRange range = GetInternalSelectionRange();
2189         GetBuffer().CopyToClipboard(range);
2190
2191         DeleteSelectedContent();
2192         LayoutContent();
2193         Refresh(false);
2194     }
2195 }
2196
2197 void wxRichTextCtrl::Paste()
2198 {
2199     if (CanPaste())
2200     {
2201         BeginBatchUndo(_("Paste"));
2202
2203         long newPos = m_caretPosition;
2204         DeleteSelectedContent(& newPos);
2205
2206         GetBuffer().PasteFromClipboard(newPos);
2207
2208         EndBatchUndo();
2209     }
2210 }
2211
2212 void wxRichTextCtrl::DeleteSelection()
2213 {
2214     if (CanDeleteSelection())
2215     {
2216         DeleteSelectedContent();
2217     }
2218 }
2219
2220 bool wxRichTextCtrl::HasSelection() const
2221 {
2222     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2223 }
2224
2225 bool wxRichTextCtrl::CanCopy() const
2226 {
2227     // Can copy if there's a selection
2228     return HasSelection();
2229 }
2230
2231 bool wxRichTextCtrl::CanCut() const
2232 {
2233     return HasSelection() && IsEditable();
2234 }
2235
2236 bool wxRichTextCtrl::CanPaste() const
2237 {
2238     if ( !IsEditable() )
2239         return false;
2240
2241     return GetBuffer().CanPasteFromClipboard();
2242 }
2243
2244 bool wxRichTextCtrl::CanDeleteSelection() const
2245 {
2246     return HasSelection() && IsEditable();
2247 }
2248
2249
2250 // ----------------------------------------------------------------------------
2251 // Accessors
2252 // ----------------------------------------------------------------------------
2253
2254 void wxRichTextCtrl::SetEditable(bool editable)
2255 {
2256     m_editable = editable;
2257 }
2258
2259 void wxRichTextCtrl::SetInsertionPoint(long pos)
2260 {
2261     SelectNone();
2262
2263     m_caretPosition = pos - 1;
2264 }
2265
2266 void wxRichTextCtrl::SetInsertionPointEnd()
2267 {
2268     long pos = GetLastPosition();
2269     SetInsertionPoint(pos);
2270 }
2271
2272 long wxRichTextCtrl::GetInsertionPoint() const
2273 {
2274     return m_caretPosition+1;
2275 }
2276
2277 wxTextPos wxRichTextCtrl::GetLastPosition() const
2278 {
2279     return GetBuffer().GetRange().GetEnd();
2280 }
2281
2282 // If the return values from and to are the same, there is no
2283 // selection.
2284 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2285 {
2286     *from = m_selectionRange.GetStart();
2287     *to = m_selectionRange.GetEnd();
2288     if ((*to) != -1 && (*to) != -2)
2289         (*to) ++;
2290 }
2291
2292 bool wxRichTextCtrl::IsEditable() const
2293 {
2294     return m_editable;
2295 }
2296
2297 // ----------------------------------------------------------------------------
2298 // selection
2299 // ----------------------------------------------------------------------------
2300
2301 void wxRichTextCtrl::SetSelection(long from, long to)
2302 {
2303     // if from and to are both -1, it means (in wxWidgets) that all text should
2304     // be selected.
2305     if ( (from == -1) && (to == -1) )
2306     {
2307         from = 0;
2308         to = GetLastPosition()+1;
2309     }
2310
2311     DoSetSelection(from, to);
2312 }
2313
2314 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2315 {
2316     m_selectionAnchor = from;
2317     m_selectionRange.SetRange(from, to-1);
2318     if (from > -2)
2319         m_caretPosition = from-1;
2320
2321     Refresh(false);
2322     PositionCaret();
2323 }
2324
2325 // ----------------------------------------------------------------------------
2326 // Editing
2327 // ----------------------------------------------------------------------------
2328
2329 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2330                              const wxString& value)
2331 {
2332     BeginBatchUndo(_("Replace"));
2333
2334     DeleteSelectedContent();
2335
2336     DoWriteText(value, SetValue_SelectionOnly);
2337
2338     EndBatchUndo();
2339 }
2340
2341 void wxRichTextCtrl::Remove(long from, long to)
2342 {
2343     SelectNone();
2344
2345     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to), this);
2346
2347     LayoutContent();
2348     if (!IsFrozen())
2349         Refresh(false);
2350 }
2351
2352 bool wxRichTextCtrl::IsModified() const
2353 {
2354     return m_buffer.IsModified();
2355 }
2356
2357 void wxRichTextCtrl::MarkDirty()
2358 {
2359     m_buffer.Modify(true);
2360 }
2361
2362 void wxRichTextCtrl::DiscardEdits()
2363 {
2364     m_caretPositionForDefaultStyle = -2;
2365     m_buffer.Modify(false);
2366     m_buffer.GetCommandProcessor()->ClearCommands();
2367 }
2368
2369 int wxRichTextCtrl::GetNumberOfLines() const
2370 {
2371     return GetBuffer().GetParagraphCount();
2372 }
2373
2374 // ----------------------------------------------------------------------------
2375 // Positions <-> coords
2376 // ----------------------------------------------------------------------------
2377
2378 long wxRichTextCtrl::XYToPosition(long x, long y) const
2379 {
2380     return GetBuffer().XYToPosition(x, y);
2381 }
2382
2383 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2384 {
2385     return GetBuffer().PositionToXY(pos, x, y);
2386 }
2387
2388 // ----------------------------------------------------------------------------
2389 //
2390 // ----------------------------------------------------------------------------
2391
2392 void wxRichTextCtrl::ShowPosition(long pos)
2393 {
2394     if (!IsPositionVisible(pos))
2395         ScrollIntoView(pos-1, WXK_DOWN);
2396 }
2397
2398 int wxRichTextCtrl::GetLineLength(long lineNo) const
2399 {
2400     return GetBuffer().GetParagraphLength(lineNo);
2401 }
2402
2403 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2404 {
2405     return GetBuffer().GetParagraphText(lineNo);
2406 }
2407
2408 // ----------------------------------------------------------------------------
2409 // Undo/redo
2410 // ----------------------------------------------------------------------------
2411
2412 void wxRichTextCtrl::Undo()
2413 {
2414     if (CanUndo())
2415     {
2416         GetCommandProcessor()->Undo();
2417     }
2418 }
2419
2420 void wxRichTextCtrl::Redo()
2421 {
2422     if (CanRedo())
2423     {
2424         GetCommandProcessor()->Redo();
2425     }
2426 }
2427
2428 bool wxRichTextCtrl::CanUndo() const
2429 {
2430     return GetCommandProcessor()->CanUndo();
2431 }
2432
2433 bool wxRichTextCtrl::CanRedo() const
2434 {
2435     return GetCommandProcessor()->CanRedo();
2436 }
2437
2438 // ----------------------------------------------------------------------------
2439 // implementation details
2440 // ----------------------------------------------------------------------------
2441
2442 void wxRichTextCtrl::Command(wxCommandEvent& event)
2443 {
2444     SetValue(event.GetString());
2445     GetEventHandler()->ProcessEvent(event);
2446 }
2447
2448 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2449 {
2450     // By default, load the first file into the text window.
2451     if (event.GetNumberOfFiles() > 0)
2452     {
2453         LoadFile(event.GetFiles()[0]);
2454     }
2455 }
2456
2457 wxSize wxRichTextCtrl::DoGetBestSize() const
2458 {
2459     return wxSize(10, 10);
2460 }
2461
2462 // ----------------------------------------------------------------------------
2463 // standard handlers for standard edit menu events
2464 // ----------------------------------------------------------------------------
2465
2466 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2467 {
2468     Cut();
2469 }
2470
2471 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2472 {
2473     DeleteSelection();
2474 }
2475
2476 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2477 {
2478     Copy();
2479 }
2480
2481 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2482 {
2483     Paste();
2484 }
2485
2486 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2487 {
2488     Undo();
2489 }
2490
2491 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2492 {
2493     Redo();
2494 }
2495
2496 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2497 {
2498     event.Enable( CanCut() );
2499 }
2500
2501 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2502 {
2503     event.Enable( CanCopy() );
2504 }
2505
2506 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2507 {
2508     event.Enable( CanDeleteSelection() );
2509 }
2510
2511 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2512 {
2513     event.Enable( CanPaste() );
2514 }
2515
2516 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2517 {
2518     event.Enable( CanUndo() );
2519     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2520 }
2521
2522 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2523 {
2524     event.Enable( CanRedo() );
2525     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2526 }
2527
2528 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2529 {
2530     SelectAll();
2531 }
2532
2533 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2534 {
2535     event.Enable(GetLastPosition() > 0);
2536 }
2537
2538 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& WXUNUSED(event))
2539 {
2540     if (!m_contextMenu)
2541     {
2542         m_contextMenu = new wxMenu;
2543         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2544         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2545         m_contextMenu->AppendSeparator();
2546         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2547         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2548         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2549         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2550         m_contextMenu->AppendSeparator();
2551         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2552     }
2553     PopupMenu(m_contextMenu);
2554     return;
2555 }
2556
2557 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttrEx& style)
2558 {
2559     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style);
2560 }
2561
2562 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2563 {
2564     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttrEx(style));
2565 }
2566
2567 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxRichTextAttr& style)
2568 {
2569     return GetBuffer().SetStyle(range.ToInternal(), style);
2570 }
2571
2572 // extended style setting operation with flags including:
2573 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2574 // see richtextbuffer.h for more details.
2575 bool wxRichTextCtrl::SetStyleEx(long start, long end, const wxTextAttrEx& style, int flags)
2576 {
2577     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style, flags);
2578 }
2579
2580 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttrEx& style, int flags)
2581 {
2582     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2583 }
2584
2585 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxRichTextAttr& style, int flags)
2586 {
2587     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2588 }
2589
2590 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttrEx& style)
2591 {
2592     return GetBuffer().SetDefaultStyle(style);
2593 }
2594
2595 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2596 {
2597     return GetBuffer().SetDefaultStyle(wxTextAttrEx(style));
2598 }
2599
2600 const wxTextAttrEx& wxRichTextCtrl::GetDefaultStyleEx() const
2601 {
2602     return GetBuffer().GetDefaultStyle();
2603 }
2604
2605 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2606 {
2607     return GetBuffer().GetDefaultStyle();
2608 }
2609
2610 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2611 {
2612     wxTextAttrEx attr(style);
2613     if (GetBuffer().GetStyle(position, attr))
2614     {
2615         style = attr;
2616         return true;
2617     }
2618     else
2619         return false;
2620 }
2621
2622 bool wxRichTextCtrl::GetStyle(long position, wxTextAttrEx& style)
2623 {
2624     return GetBuffer().GetStyle(position, style);
2625 }
2626
2627 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style)
2628 {
2629     return GetBuffer().GetStyle(position, style);
2630 }
2631
2632 // get the common set of styles for the range
2633 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxRichTextAttr& style)
2634 {
2635     wxTextAttrEx styleEx;
2636     if (GetBuffer().GetStyleForRange(range.ToInternal(), styleEx))
2637     {
2638         style = styleEx;
2639         return true;
2640     }
2641     else
2642         return false;
2643 }
2644
2645 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttrEx& style)
2646 {
2647     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2648 }
2649
2650 /// Get the content (uncombined) attributes for this position.
2651
2652 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2653 {
2654     wxTextAttrEx attr(style);
2655     if (GetBuffer().GetUncombinedStyle(position, attr))
2656     {
2657         style = attr;
2658         return true;
2659     }
2660     else
2661         return false;
2662 }
2663
2664 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttrEx& style)
2665 {
2666     return GetBuffer().GetUncombinedStyle(position, style);
2667 }
2668
2669 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style)
2670 {
2671     return GetBuffer().GetUncombinedStyle(position, style);
2672 }
2673
2674 /// Set font, and also the buffer attributes
2675 bool wxRichTextCtrl::SetFont(const wxFont& font)
2676 {
2677     wxControl::SetFont(font);
2678
2679     wxTextAttrEx attr = GetBuffer().GetAttributes();
2680     attr.SetFont(font);
2681     GetBuffer().SetBasicStyle(attr);
2682
2683     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2684     Refresh(false);
2685
2686     return true;
2687 }
2688
2689 /// Transform logical to physical
2690 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2691 {
2692     wxPoint pt;
2693     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2694
2695     return pt;
2696 }
2697
2698 /// Transform physical to logical
2699 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2700 {
2701     wxPoint pt;
2702     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2703
2704     return pt;
2705 }
2706
2707 /// Position the caret
2708 void wxRichTextCtrl::PositionCaret()
2709 {
2710     if (!GetCaret())
2711         return;
2712
2713     //wxLogDebug(wxT("PositionCaret"));
2714
2715     wxRect caretRect;
2716     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2717     {
2718         wxPoint originalPt = caretRect.GetPosition();
2719         wxPoint pt = GetPhysicalPoint(originalPt);
2720         if (GetCaret()->GetPosition() != pt)
2721         {
2722             GetCaret()->Move(pt);
2723             GetCaret()->SetSize(caretRect.GetSize());
2724         }
2725     }
2726 }
2727
2728 /// Get the caret height and position for the given character position
2729 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2730 {
2731     wxClientDC dc(this);
2732     dc.SetFont(GetFont());
2733
2734     PrepareDC(dc);
2735
2736     wxPoint pt;
2737     int height = 0;
2738
2739     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2740     {
2741         // Caret height can't be zero
2742         if (height == 0)
2743             height = dc.GetCharHeight();
2744
2745         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2746         return true;
2747     }
2748
2749     return false;
2750 }
2751
2752 /// Gets the line for the visible caret position. If the caret is
2753 /// shown at the very end of the line, it means the next character is actually
2754 /// on the following line. So let's get the line we're expecting to find
2755 /// if this is the case.
2756 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2757 {
2758     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2759     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2760     if (line)
2761     {
2762         wxRichTextRange lineRange = line->GetAbsoluteRange();
2763         if (caretPosition == lineRange.GetStart()-1 &&
2764             (para->GetRange().GetStart() != lineRange.GetStart()))
2765         {
2766             if (!m_caretAtLineStart)
2767                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2768         }
2769     }
2770     return line;
2771 }
2772
2773
2774 /// Move the caret to the given character position
2775 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2776 {
2777     if (GetBuffer().GetDirty())
2778         LayoutContent();
2779
2780     if (pos <= GetBuffer().GetRange().GetEnd())
2781     {
2782         SetCaretPosition(pos, showAtLineStart);
2783
2784         PositionCaret();
2785
2786         return true;
2787     }
2788     else
2789         return false;
2790 }
2791
2792 /// Layout the buffer: which we must do before certain operations, such as
2793 /// setting the caret position.
2794 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2795 {
2796     if (GetBuffer().GetDirty() || onlyVisibleRect)
2797     {
2798         wxRect availableSpace(GetClientSize());
2799         if (availableSpace.width == 0)
2800             availableSpace.width = 10;
2801         if (availableSpace.height == 0)
2802             availableSpace.height = 10;
2803
2804         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2805         if (onlyVisibleRect)
2806         {
2807             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2808             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2809         }
2810
2811         wxClientDC dc(this);
2812         dc.SetFont(GetFont());
2813
2814         PrepareDC(dc);
2815
2816         GetBuffer().Defragment();
2817         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2818         GetBuffer().Layout(dc, availableSpace, flags);
2819         GetBuffer().SetDirty(false);
2820
2821         if (!IsFrozen())
2822             SetupScrollbars();
2823     }
2824
2825     return true;
2826 }
2827
2828 /// Is all of the selection bold?
2829 bool wxRichTextCtrl::IsSelectionBold()
2830 {
2831     if (HasSelection())
2832     {
2833         wxRichTextAttr attr;
2834         wxRichTextRange range = GetSelectionRange();
2835         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2836         attr.SetFontWeight(wxBOLD);
2837
2838         return HasCharacterAttributes(range, attr);
2839     }
2840     else
2841     {
2842         // If no selection, then we need to combine current style with default style
2843         // to see what the effect would be if we started typing.
2844         wxRichTextAttr attr;
2845         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2846
2847         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2848         if (GetStyle(pos, attr))
2849         {
2850             if (IsDefaultStyleShowing())
2851                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2852             return attr.GetFontWeight() == wxBOLD;
2853         }
2854     }
2855     return false;
2856 }
2857
2858 /// Is all of the selection italics?
2859 bool wxRichTextCtrl::IsSelectionItalics()
2860 {
2861     if (HasSelection())
2862     {
2863         wxRichTextRange range = GetSelectionRange();
2864         wxRichTextAttr attr;
2865         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2866         attr.SetFontStyle(wxITALIC);
2867
2868         return HasCharacterAttributes(range, attr);
2869     }
2870     else
2871     {
2872         // If no selection, then we need to combine current style with default style
2873         // to see what the effect would be if we started typing.
2874         wxRichTextAttr attr;
2875         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2876
2877         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2878         if (GetStyle(pos, attr))
2879         {
2880             if (IsDefaultStyleShowing())
2881                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2882             return attr.GetFontStyle() == wxITALIC;
2883         }
2884     }
2885     return false;
2886 }
2887
2888 /// Is all of the selection underlined?
2889 bool wxRichTextCtrl::IsSelectionUnderlined()
2890 {
2891     if (HasSelection())
2892     {
2893         wxRichTextRange range = GetSelectionRange();
2894         wxRichTextAttr attr;
2895         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2896         attr.SetFontUnderlined(true);
2897
2898         return HasCharacterAttributes(range, attr);
2899     }
2900     else
2901     {
2902         // If no selection, then we need to combine current style with default style
2903         // to see what the effect would be if we started typing.
2904         wxRichTextAttr attr;
2905         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2906         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2907
2908         if (GetStyle(pos, attr))
2909         {
2910             if (IsDefaultStyleShowing())
2911                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2912             return attr.GetFontUnderlined();
2913         }
2914     }
2915     return false;
2916 }
2917
2918 /// Apply bold to the selection
2919 bool wxRichTextCtrl::ApplyBoldToSelection()
2920 {
2921     wxRichTextAttr attr;
2922     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2923     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
2924
2925     if (HasSelection())
2926         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2927     else
2928         SetAndShowDefaultStyle(attr);
2929     return true;
2930 }
2931
2932 /// Apply italic to the selection
2933 bool wxRichTextCtrl::ApplyItalicToSelection()
2934 {
2935     wxRichTextAttr attr;
2936     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2937     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
2938
2939     if (HasSelection())
2940         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2941     else
2942         SetAndShowDefaultStyle(attr);
2943     return true;
2944 }
2945
2946 /// Apply underline to the selection
2947 bool wxRichTextCtrl::ApplyUnderlineToSelection()
2948 {
2949     wxRichTextAttr attr;
2950     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2951     attr.SetFontUnderlined(!IsSelectionUnderlined());
2952
2953     if (HasSelection())
2954         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2955     else
2956         SetAndShowDefaultStyle(attr);
2957     return true;
2958 }
2959
2960 /// Is all of the selection aligned according to the specified flag?
2961 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
2962 {
2963     wxRichTextRange range;
2964     if (HasSelection())
2965         range = GetSelectionRange();
2966     else
2967         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
2968
2969     wxRichTextAttr attr;
2970     attr.SetAlignment(alignment);
2971
2972     return HasParagraphAttributes(range, attr);
2973 }
2974
2975 /// Apply alignment to the selection
2976 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
2977 {
2978     wxRichTextAttr attr;
2979     attr.SetAlignment(alignment);
2980     if (HasSelection())
2981         return SetStyle(GetSelectionRange(), attr);
2982     else
2983     {
2984         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
2985         if (para)
2986             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
2987     }
2988     return true;
2989 }
2990
2991 /// Apply a named style to the selection
2992 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
2993 {
2994     // Flags are defined within each definition, so only certain
2995     // attributes are applied.
2996     wxRichTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
2997
2998     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE;
2999
3000     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
3001     {
3002         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3003
3004         wxRichTextRange range;
3005
3006         if (HasSelection())
3007             range = GetSelectionRange();
3008         else
3009         {
3010             long pos = GetAdjustedCaretPosition(GetCaretPosition());
3011             range = wxRichTextRange(pos, pos+1);
3012         }
3013
3014         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
3015     }
3016
3017     // Make sure the attr has the style name
3018     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
3019     {
3020         attr.SetParagraphStyleName(def->GetName());
3021
3022         // If applying a paragraph style, we only want the paragraph nodes to adopt these
3023         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
3024         // to change its style independently.
3025         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
3026     }
3027     else
3028         attr.SetCharacterStyleName(def->GetName());
3029
3030     if (HasSelection())
3031         return SetStyleEx(GetSelectionRange(), attr, flags);
3032     else
3033     {
3034         SetAndShowDefaultStyle(attr);
3035         return true;
3036     }
3037 }
3038
3039 /// Apply the style sheet to the buffer, for example if the styles have changed.
3040 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
3041 {
3042     if (!styleSheet)
3043         styleSheet = GetBuffer().GetStyleSheet();
3044     if (!styleSheet)
3045         return false;
3046
3047     if (GetBuffer().ApplyStyleSheet(styleSheet))
3048     {
3049         GetBuffer().Invalidate(wxRICHTEXT_ALL);
3050         Refresh(false);
3051         return true;
3052     }
3053     else
3054         return false;
3055 }
3056
3057 /// Sets the default style to the style under the cursor
3058 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3059 {
3060     wxTextAttrEx attr;
3061     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3062
3063     // If at the start of a paragraph, use the next position.
3064     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3065
3066     if (GetUncombinedStyle(pos, attr))
3067     {
3068         SetDefaultStyle(attr);
3069         return true;
3070     }
3071
3072     return false;
3073 }
3074
3075 /// Returns the first visible position in the current view
3076 long wxRichTextCtrl::GetFirstVisiblePosition() const
3077 {
3078     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3079     if (line)
3080         return line->GetAbsoluteRange().GetStart();
3081     else
3082         return 0;
3083 }
3084
3085 /// Get the first visible point in the window
3086 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3087 {
3088     int ppuX, ppuY;
3089     int startXUnits, startYUnits;
3090
3091     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3092     GetViewStart(& startXUnits, & startYUnits);
3093
3094     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3095 }
3096
3097 /// The adjusted caret position is the character position adjusted to take
3098 /// into account whether we're at the start of a paragraph, in which case
3099 /// style information should be taken from the next position, not current one.
3100 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3101 {
3102     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3103
3104     if (para && (caretPos+1 == para->GetRange().GetStart()))
3105         caretPos ++;
3106     return caretPos;
3107 }
3108
3109 /// Get/set the selection range in character positions. -1, -1 means no selection.
3110 /// The range is in API convention, i.e. a single character selection is denoted
3111 /// by (n, n+1)
3112 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3113 {
3114     wxRichTextRange range = GetInternalSelectionRange();
3115     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3116         range.SetEnd(range.GetEnd() + 1);
3117     return range;
3118 }
3119
3120 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3121 {
3122     wxRichTextRange range1(range);
3123     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3124         range1.SetEnd(range1.GetEnd() - 1);
3125
3126     wxASSERT( range1.GetStart() > range1.GetEnd() );
3127
3128     SetInternalSelectionRange(range1);
3129 }
3130
3131 /// Set list style
3132 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3133 {
3134     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3135 }
3136
3137 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3138 {
3139     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3140 }
3141
3142 /// Clear list for given range
3143 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3144 {
3145     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3146 }
3147
3148 /// Number/renumber any list elements in the given range
3149 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3150 {
3151     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3152 }
3153
3154 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3155 {
3156     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3157 }
3158
3159 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3160 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3161 {
3162     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3163 }
3164
3165 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3166 {
3167     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3168 }
3169
3170 /// Deletes the content in the given range
3171 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3172 {
3173     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3174 }
3175
3176 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3177 {
3178     if (sm_availableFontNames.GetCount() == 0)
3179     {
3180         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3181         sm_availableFontNames.Sort();
3182     }
3183     return sm_availableFontNames;
3184 }
3185
3186 void wxRichTextCtrl::ClearAvailableFontNames()
3187 {
3188     sm_availableFontNames.Clear();
3189 }
3190
3191 #endif
3192     // wxUSE_RICHTEXT