src/osx/textctrl_osx.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/textctrl_osx.cpp
   3 // Purpose:     wxTextCtrl
   4 // Author:      Stefan Csomor
   5 // Modified by: Ryan Norton (MLTE GetLineLength and GetLineText)
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id: textctrl.cpp 54820 2008-07-29 20:04:11Z SC $
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #if wxUSE_TEXTCTRL
  15
  16 #include "wx/textctrl.h"
  17
  18 #ifndef WX_PRECOMP
  19     #include "wx/intl.h"
  20     #include "wx/app.h"
  21     #include "wx/utils.h"
  22     #include "wx/dc.h"
  23     #include "wx/button.h"
  24     #include "wx/menu.h"
  25     #include "wx/settings.h"
  26     #include "wx/msgdlg.h"
  27     #include "wx/toplevel.h"
  28 #endif
  29
  30 #ifdef __DARWIN__
  31     #include <sys/types.h>
  32     #include <sys/stat.h>
  33 #else
  34     #include <stat.h>
  35 #endif
  36
  37 #if wxUSE_STD_IOSTREAM
  38     #if wxUSE_IOSTREAMH
  39         #include <fstream.h>
  40     #else
  41         #include <fstream>
  42     #endif
  43 #endif
  44
  45 #include "wx/filefn.h"
  46 #include "wx/sysopt.h"
  47 #include "wx/thread.h"
  48
  49 #include "wx/osx/private.h"
  50
  51 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxTextCtrlBase)
  52
  53 BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
  54     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  55     EVT_CHAR(wxTextCtrl::OnChar)
  56     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
  57     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
  58     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
  59     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
  60     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
  61     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
  62     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
  63
  64     EVT_CONTEXT_MENU(wxTextCtrl::OnContextMenu)
  65
  66     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
  67     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
  68     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
  69     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
  70     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
  71     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
  72     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
  73 END_EVENT_TABLE()
  74
  75
  76 void wxTextCtrl::Init()
  77 {
  78     m_editable = true ;
  79     m_dirty = false;
  80
  81     m_maxLength = 0;
  82     m_privateContextMenu = NULL;
  83     m_triggerUpdateEvents = true ;
  84 }
  85
  86 wxTextCtrl::~wxTextCtrl()
  87 {
  88 #if wxUSE_MENUS
  89     delete m_privateContextMenu;
  90 #endif
  91 }
  92
  93 bool wxTextCtrl::Create( wxWindow *parent,
  94     wxWindowID id,
  95     const wxString& str,
  96     const wxPoint& pos,
  97     const wxSize& size,
  98     long style,
  99     const wxValidator& validator,
 100     const wxString& name )
 101 {
 102     m_macIsUserPane = false ;
 103     m_editable = true ;
 104
 105     if ( ! (style & wxNO_BORDER) )
 106         style = (style & ~wxBORDER_MASK) | wxSUNKEN_BORDER ;
 107
 108     if ( !wxTextCtrlBase::Create( parent, id, pos, size, style & ~(wxHSCROLL | wxVSCROLL), validator, name ) )
 109         return false;
 110
 111     if ( m_windowStyle & wxTE_MULTILINE )
 112     {
 113         // always turn on this style for multi-line controls
 114         m_windowStyle |= wxTE_PROCESS_ENTER;
 115         style |= wxTE_PROCESS_ENTER ;
 116     }
 117
 118
 119     m_peer = wxWidgetImpl::CreateTextControl( this, GetParent(), GetId(), str, pos, size, style, GetExtraStyle() );
 120
 121     MacPostControlCreate(pos, size) ;
 122
 123     // only now the embedding is correct and we can do a positioning update
 124
 125     MacSuperChangedPosition() ;
 126
 127     if ( m_windowStyle & wxTE_READONLY)
 128         SetEditable( false ) ;
 129
 130     SetCursor( wxCursor( wxCURSOR_IBEAM ) ) ;
 131
 132     return true;
 133 }
 134
 135 wxTextWidgetImpl* wxTextCtrl::GetTextPeer() const
 136 {
 137     return dynamic_cast<wxTextWidgetImpl*> (m_peer);
 138 }
 139
 140 void wxTextCtrl::MacSuperChangedPosition()
 141 {
 142     wxWindow::MacSuperChangedPosition() ;
 143 #if wxOSX_USE_CARBON
 144     GetPeer()->SuperChangedPosition() ;
 145 #endif
 146 }
 147
 148 void wxTextCtrl::MacVisibilityChanged()
 149 {
 150 #if wxOSX_USE_CARBON
 151     GetPeer()->VisibilityChanged( GetPeer()->IsVisible() );
 152 #endif
 153 }
 154
 155 void wxTextCtrl::MacCheckSpelling(bool check)
 156 {
 157     GetTextPeer()->CheckSpelling(check);
 158 }
 159
 160 wxString wxTextCtrl::DoGetValue() const
 161 {
 162     return GetTextPeer()->GetStringValue() ;
 163 }
 164
 165 void wxTextCtrl::GetSelection(long* from, long* to) const
 166 {
 167     GetTextPeer()->GetSelection( from , to ) ;
 168 }
 169
 170 void wxTextCtrl::SetMaxLength(unsigned long len)
 171 {
 172     m_maxLength = len ;
 173 }
 174
 175 bool wxTextCtrl::SetFont( const wxFont& font )
 176 {
 177     if ( !wxTextCtrlBase::SetFont( font ) )
 178         return false ;
 179
 180     GetPeer()->SetFont( font , GetForegroundColour() , GetWindowStyle(), false /* dont ignore black */ ) ;
 181
 182     return true ;
 183 }
 184
 185 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
 186 {
 187     GetTextPeer()->SetStyle( start , end , style ) ;
 188
 189     return true ;
 190 }
 191
 192 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
 193 {
 194     wxTextCtrlBase::SetDefaultStyle( style ) ;
 195     SetStyle( -1  /*current selection*/  , -1 /*current selection*/ , GetDefaultStyle() ) ;
 196
 197     return true ;
 198 }
 199
 200 // Clipboard operations
 201
 202 void wxTextCtrl::Copy()
 203 {
 204     if (CanCopy())
 205         GetTextPeer()->Copy() ;
 206 }
 207
 208 void wxTextCtrl::Cut()
 209 {
 210     if (CanCut())
 211     {
 212         GetTextPeer()->Cut() ;
 213
 214         SendTextUpdatedEvent();
 215     }
 216 }
 217
 218 void wxTextCtrl::Paste()
 219 {
 220     if (CanPaste())
 221     {
 222         GetTextPeer()->Paste() ;
 223
 224         // TODO: eventually we should add setting the default style again
 225         SendTextUpdatedEvent();
 226     }
 227 }
 228
 229 bool wxTextCtrl::CanCopy() const
 230 {
 231     // Can copy if there's a selection
 232     long from, to;
 233     GetSelection( &from, &to );
 234
 235     return (from != to);
 236 }
 237
 238 bool wxTextCtrl::CanCut() const
 239 {
 240     if ( !IsEditable() )
 241         return false;
 242
 243     // Can cut if there's a selection
 244     long from, to;
 245     GetSelection( &from, &to );
 246
 247     return (from != to);
 248 }
 249
 250 bool wxTextCtrl::CanPaste() const
 251 {
 252     if (!IsEditable())
 253         return false;
 254
 255     return GetTextPeer()->CanPaste() ;
 256 }
 257
 258 void wxTextCtrl::SetEditable(bool editable)
 259 {
 260     if ( editable != m_editable )
 261     {
 262         m_editable = editable ;
 263         GetTextPeer()->SetEditable( editable ) ;
 264     }
 265 }
 266
 267 void wxTextCtrl::SetInsertionPoint(long pos)
 268 {
 269     SetSelection( pos , pos ) ;
 270 }
 271
 272 void wxTextCtrl::SetInsertionPointEnd()
 273 {
 274     long pos = GetLastPosition();
 275     SetInsertionPoint( pos );
 276 }
 277
 278 long wxTextCtrl::GetInsertionPoint() const
 279 {
 280     long begin, end ;
 281     GetSelection( &begin , &end ) ;
 282
 283     return begin ;
 284 }
 285
 286 wxTextPos wxTextCtrl::GetLastPosition() const
 287 {
 288     return GetTextPeer()->GetLastPosition() ;
 289 }
 290
 291 void wxTextCtrl::Remove(long from, long to)
 292 {
 293     GetTextPeer()->Remove( from , to ) ;
 294     if ( m_triggerUpdateEvents )
 295         SendTextUpdatedEvent();
 296 }
 297
 298 void wxTextCtrl::SetSelection(long from, long to)
 299 {
 300     GetTextPeer()->SetSelection( from , to ) ;
 301 }
 302
 303 void wxTextCtrl::WriteText(const wxString& str)
 304 {
 305     GetTextPeer()->WriteText( str ) ;
 306     if ( m_triggerUpdateEvents )
 307         SendTextUpdatedEvent();
 308 }
 309
 310 void wxTextCtrl::Clear()
 311 {
 312     GetTextPeer()->Clear() ;
 313     SendTextUpdatedEvent();
 314 }
 315
 316 bool wxTextCtrl::IsModified() const
 317 {
 318     return m_dirty;
 319 }
 320
 321 bool wxTextCtrl::IsEditable() const
 322 {
 323     return IsEnabled() && m_editable ;
 324 }
 325
 326 bool wxTextCtrl::AcceptsFocus() const
 327 {
 328     // we don't want focus if we can't be edited
 329     return /*IsEditable() && */ wxControl::AcceptsFocus();
 330 }
 331
 332 wxSize wxTextCtrl::DoGetBestSize() const
 333 {
 334     int wText, hText;
 335
 336     // these are the numbers from the HIG:
 337     // we reduce them by the borders first
 338     wText = 100 ;
 339
 340     switch ( m_windowVariant )
 341     {
 342         case wxWINDOW_VARIANT_NORMAL :
 343             hText = 22 - 6 ;
 344             break ;
 345
 346         case wxWINDOW_VARIANT_SMALL :
 347             hText = 19 - 6 ;
 348             break ;
 349
 350         case wxWINDOW_VARIANT_MINI :
 351             hText = 15 - 6 ;
 352             break ;
 353
 354         default :
 355             hText = 22 - 6;
 356             break ;
 357     }
 358
 359     // as the above numbers have some free space around the text
 360     // we get 5 lines like this anyway
 361     if ( m_windowStyle & wxTE_MULTILINE )
 362          hText *= 5 ;
 363
 364     if ( !HasFlag(wxNO_BORDER) )
 365         hText += 6 ;
 366
 367     return wxSize(wText, hText);
 368 }
 369
 370 // ----------------------------------------------------------------------------
 371 // Undo/redo
 372 // ----------------------------------------------------------------------------
 373
 374 void wxTextCtrl::Undo()
 375 {
 376     if (CanUndo())
 377         GetTextPeer()->Undo() ;
 378 }
 379
 380 void wxTextCtrl::Redo()
 381 {
 382     if (CanRedo())
 383         GetTextPeer()->Redo() ;
 384 }
 385
 386 bool wxTextCtrl::CanUndo() const
 387 {
 388     if ( !IsEditable() )
 389         return false ;
 390
 391     return GetTextPeer()->CanUndo() ;
 392 }
 393
 394 bool wxTextCtrl::CanRedo() const
 395 {
 396     if ( !IsEditable() )
 397         return false ;
 398
 399     return GetTextPeer()->CanRedo() ;
 400 }
 401
 402 void wxTextCtrl::MarkDirty()
 403 {
 404     m_dirty = true;
 405 }
 406
 407 void wxTextCtrl::DiscardEdits()
 408 {
 409     m_dirty = false;
 410 }
 411
 412 int wxTextCtrl::GetNumberOfLines() const
 413 {
 414     return GetTextPeer()->GetNumberOfLines() ;
 415 }
 416
 417 long wxTextCtrl::XYToPosition(long x, long y) const
 418 {
 419     return GetTextPeer()->XYToPosition( x , y ) ;
 420 }
 421
 422 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 423 {
 424     return GetTextPeer()->PositionToXY( pos , x , y ) ;
 425 }
 426
 427 void wxTextCtrl::ShowPosition(long pos)
 428 {
 429     return GetTextPeer()->ShowPosition(pos) ;
 430 }
 431
 432 int wxTextCtrl::GetLineLength(long lineNo) const
 433 {
 434     return GetTextPeer()->GetLineLength(lineNo) ;
 435 }
 436
 437 wxString wxTextCtrl::GetLineText(long lineNo) const
 438 {
 439     return GetTextPeer()->GetLineText(lineNo) ;
 440 }
 441
 442 void wxTextCtrl::Command(wxCommandEvent & event)
 443 {
 444     SetValue(event.GetString());
 445     ProcessCommand(event);
 446 }
 447
 448 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 449 {
 450     // By default, load the first file into the text window.
 451     if (event.GetNumberOfFiles() > 0)
 452         LoadFile( event.GetFiles()[0] );
 453 }
 454
 455 void wxTextCtrl::OnChar(wxKeyEvent& event)
 456 {
 457     int key = event.GetKeyCode() ;
 458     bool eat_key = false ;
 459     long from, to;
 460
 461     if ( key == 'a' && event.MetaDown() )
 462     {
 463         SelectAll() ;
 464
 465         return ;
 466     }
 467
 468     if ( key == 'c' && event.MetaDown() )
 469     {
 470         if ( CanCopy() )
 471             Copy() ;
 472
 473         return ;
 474     }
 475
 476     if ( !IsEditable() && !event.IsKeyInCategory(WXK_CATEGORY_ARROW | WXK_CATEGORY_TAB) &&
 477         !( key == WXK_RETURN && ( (m_windowStyle & wxTE_PROCESS_ENTER) || (m_windowStyle & wxTE_MULTILINE) ) )
 478 //        && key != WXK_PAGEUP && key != WXK_PAGEDOWN && key != WXK_HOME && key != WXK_END
 479         )
 480     {
 481         // eat it
 482         return ;
 483     }
 484
 485     // Check if we have reached the max # of chars (if it is set), but still
 486     // allow navigation and deletion
 487     GetSelection( &from, &to );
 488     if ( !IsMultiLine() && m_maxLength && GetValue().length() >= m_maxLength &&
 489         !event.IsKeyInCategory(WXK_CATEGORY_ARROW | WXK_CATEGORY_TAB | WXK_CATEGORY_CUT) &&
 490         !( key == WXK_RETURN && (m_windowStyle & wxTE_PROCESS_ENTER) ) &&
 491         from == to )
 492     {
 493         // eat it, we don't want to add more than allowed # of characters
 494
 495         // TODO: generate EVT_TEXT_MAXLEN()
 496         return;
 497     }
 498
 499     // assume that any key not processed yet is going to modify the control
 500     m_dirty = true;
 501
 502     if ( key == 'v' && event.MetaDown() )
 503     {
 504         if ( CanPaste() )
 505             Paste() ;
 506
 507         return ;
 508     }
 509
 510     if ( key == 'x' && event.MetaDown() )
 511     {
 512         if ( CanCut() )
 513             Cut() ;
 514
 515         return ;
 516     }
 517
 518     switch ( key )
 519     {
 520         case WXK_RETURN:
 521             if (m_windowStyle & wxTE_PROCESS_ENTER)
 522             {
 523                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 524                 event.SetEventObject( this );
 525                 event.SetString( GetValue() );
 526                 if ( HandleWindowEvent(event) )
 527                     return;
 528             }
 529
 530             if ( !(m_windowStyle & wxTE_MULTILINE) )
 531             {
 532                 wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
 533                 if ( tlw && tlw->GetDefaultItem() )
 534                 {
 535                     wxButton *def = wxDynamicCast(tlw->GetDefaultItem(), wxButton);
 536                     if ( def && def->IsEnabled() )
 537                     {
 538                         wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, def->GetId() );
 539                         event.SetEventObject(def);
 540                         def->Command(event);
 541
 542                         return ;
 543                     }
 544                 }
 545
 546                 // this will make wxWidgets eat the ENTER key so that
 547                 // we actually prevent line wrapping in a single line text control
 548                 eat_key = true;
 549             }
 550             break;
 551
 552         case WXK_TAB:
 553             if ( !(m_windowStyle & wxTE_PROCESS_TAB))
 554             {
 555                 int flags = 0;
 556                 if (!event.ShiftDown())
 557                     flags |= wxNavigationKeyEvent::IsForward ;
 558                 if (event.ControlDown())
 559                     flags |= wxNavigationKeyEvent::WinChange ;
 560                 Navigate(flags);
 561
 562                 return;
 563             }
 564             else
 565             {
 566                 // This is necessary (don't know why);
 567                 // otherwise the tab will not be inserted.
 568                 WriteText(wxT("\t"));
 569                 eat_key = true;
 570             }
 571             break;
 572
 573         default:
 574             break;
 575     }
 576
 577     if (!eat_key)
 578     {
 579         // perform keystroke handling
 580         event.Skip(true) ;
 581     }
 582
 583     // osx_cocoa sends its event upon insertText
 584 #if wxOSX_USE_CARBON
 585     if ( ( key >= 0x20 && key < WXK_START ) ||
 586          ( key >= WXK_NUMPAD0 && key <= WXK_DIVIDE ) ||
 587          key == WXK_RETURN ||
 588          key == WXK_DELETE ||
 589          key == WXK_BACK)
 590     {
 591         wxCommandEvent event1(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
 592         event1.SetEventObject( this );
 593         wxPostEvent( GetEventHandler(), event1 );
 594     }
 595 #endif
 596 }
 597
 598 // ----------------------------------------------------------------------------
 599 // standard handlers for standard edit menu events
 600 // ----------------------------------------------------------------------------
 601
 602 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
 603 {
 604     Cut();
 605 }
 606
 607 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
 608 {
 609     Copy();
 610 }
 611
 612 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
 613 {
 614     Paste();
 615 }
 616
 617 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
 618 {
 619     Undo();
 620 }
 621
 622 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
 623 {
 624     Redo();
 625 }
 626
 627 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
 628 {
 629     long from, to;
 630
 631     GetSelection( &from, &to );
 632     if (from != -1 && to != -1)
 633         Remove( from, to );
 634 }
 635
 636 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
 637 {
 638     SetSelection(-1, -1);
 639 }
 640
 641 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
 642 {
 643     event.Enable( CanCut() );
 644 }
 645
 646 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
 647 {
 648     event.Enable( CanCopy() );
 649 }
 650
 651 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
 652 {
 653     event.Enable( CanPaste() );
 654 }
 655
 656 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
 657 {
 658     event.Enable( CanUndo() );
 659 }
 660
 661 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
 662 {
 663     event.Enable( CanRedo() );
 664 }
 665
 666 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
 667 {
 668     long from, to;
 669
 670     GetSelection( &from, &to );
 671     event.Enable( from != -1 && to != -1 && from != to && IsEditable() ) ;
 672 }
 673
 674 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
 675 {
 676     event.Enable(GetLastPosition() > 0);
 677 }
 678
 679 // CS: Context Menus only work with MLTE implementations or non-multiline HIViews at the moment
 680
 681 void wxTextCtrl::OnContextMenu(wxContextMenuEvent& event)
 682 {
 683     if ( GetTextPeer()->HasOwnContextMenu() )
 684     {
 685         event.Skip() ;
 686         return ;
 687     }
 688
 689 #if wxUSE_MENUS
 690     if (m_privateContextMenu == NULL)
 691     {
 692         m_privateContextMenu = new wxMenu;
 693         m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
 694         m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
 695         m_privateContextMenu->AppendSeparator();
 696         m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
 697         m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
 698         m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
 699         m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
 700         m_privateContextMenu->AppendSeparator();
 701         m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
 702     }
 703
 704     if (m_privateContextMenu != NULL)
 705         PopupMenu(m_privateContextMenu);
 706 #endif
 707 }
 708
 709 bool wxTextCtrl::MacSetupCursor( const wxPoint& pt )
 710 {
 711     if ( !GetTextPeer()->SetupCursor( pt ) )
 712         return wxWindow::MacSetupCursor( pt ) ;
 713     else
 714         return true ;
 715 }
 716
 717 // ----------------------------------------------------------------------------
 718 // implementation base class
 719 // ----------------------------------------------------------------------------
 720
 721 void wxTextWidgetImpl::SetStyle(long WXUNUSED(start),
 722                                 long WXUNUSED(end),
 723                                 const wxTextAttr& WXUNUSED(style))
 724 {
 725 }
 726
 727 void wxTextWidgetImpl::Copy()
 728 {
 729 }
 730
 731 void wxTextWidgetImpl::Cut()
 732 {
 733 }
 734
 735 void wxTextWidgetImpl::Paste()
 736 {
 737 }
 738
 739 bool wxTextWidgetImpl::CanPaste() const
 740 {
 741     return false ;
 742 }
 743
 744 void wxTextWidgetImpl::SetEditable(bool WXUNUSED(editable))
 745 {
 746 }
 747
 748 long wxTextWidgetImpl::GetLastPosition() const
 749 {
 750     return GetStringValue().length() ;
 751 }
 752
 753 void wxTextWidgetImpl::Replace( long from , long to , const wxString &val )
 754 {
 755     SetSelection( from , to ) ;
 756     WriteText( val ) ;
 757 }
 758
 759 void wxTextWidgetImpl::Remove( long from , long to )
 760 {
 761     SetSelection( from , to ) ;
 762     WriteText( wxEmptyString) ;
 763 }
 764
 765 void wxTextWidgetImpl::Clear()
 766 {
 767     SetStringValue( wxEmptyString ) ;
 768 }
 769
 770 bool wxTextWidgetImpl::CanUndo() const
 771 {
 772     return false ;
 773 }
 774
 775 void wxTextWidgetImpl::Undo()
 776 {
 777 }
 778
 779 bool wxTextWidgetImpl::CanRedo()  const
 780 {
 781     return false ;
 782 }
 783
 784 void wxTextWidgetImpl::Redo()
 785 {
 786 }
 787
 788 long wxTextWidgetImpl::XYToPosition(long WXUNUSED(x), long WXUNUSED(y)) const
 789 {
 790     return 0 ;
 791 }
 792
 793 bool wxTextWidgetImpl::PositionToXY(long WXUNUSED(pos),
 794                                     long *WXUNUSED(x),
 795                                     long *WXUNUSED(y)) const
 796 {
 797     return false ;
 798 }
 799
 800 void wxTextWidgetImpl::ShowPosition( long WXUNUSED(pos) )
 801 {
 802 }
 803
 804 int wxTextWidgetImpl::GetNumberOfLines() const
 805 {
 806     ItemCount lines = 0 ;
 807     wxString content = GetStringValue() ;
 808     lines = 1;
 809
 810     for (size_t i = 0; i < content.length() ; i++)
 811     {
 812         if (content[i] == '\r')
 813             lines++;
 814     }
 815
 816     return lines ;
 817 }
 818
 819 wxString wxTextWidgetImpl::GetLineText(long lineNo) const
 820 {
 821     // TODO: change this if possible to reflect real lines
 822     wxString content = GetStringValue() ;
 823
 824     // Find line first
 825     int count = 0;
 826     for (size_t i = 0; i < content.length() ; i++)
 827     {
 828         if (count == lineNo)
 829         {
 830             // Add chars in line then
 831             wxString tmp;
 832
 833             for (size_t j = i; j < content.length(); j++)
 834             {
 835                 if (content[j] == '\n')
 836                     return tmp;
 837
 838                 tmp += content[j];
 839             }
 840
 841             return tmp;
 842         }
 843
 844         if (content[i] == '\n')
 845             count++;
 846     }
 847
 848     return wxEmptyString ;
 849 }
 850
 851 int wxTextWidgetImpl::GetLineLength(long lineNo) const
 852 {
 853     // TODO: change this if possible to reflect real lines
 854     wxString content = GetStringValue() ;
 855
 856     // Find line first
 857     int count = 0;
 858     for (size_t i = 0; i < content.length() ; i++)
 859     {
 860         if (count == lineNo)
 861         {
 862             // Count chars in line then
 863             count = 0;
 864             for (size_t j = i; j < content.length(); j++)
 865             {
 866                 count++;
 867                 if (content[j] == '\n')
 868                     return count;
 869             }
 870
 871             return count;
 872         }
 873
 874         if (content[i] == '\n')
 875             count++;
 876     }
 877
 878     return 0 ;
 879 }
 880
 881 #endif // wxUSE_TEXTCTRL