src/msw/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/textctrl.cpp
   3 // Purpose:     wxTextCtrl
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 #ifdef __GNUG__
  17     #pragma implementation "textctrl.h"
  18 #endif
  19
  20 // ----------------------------------------------------------------------------
  21 // headers
  22 // ----------------------------------------------------------------------------
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_TEXTCTRL
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/textctrl.h"
  35     #include "wx/settings.h"
  36     #include "wx/brush.h"
  37     #include "wx/utils.h"
  38     #include "wx/intl.h"
  39     #include "wx/log.h"
  40     #include "wx/app.h"
  41 #endif
  42
  43 #include "wx/module.h"
  44
  45 #if wxUSE_CLIPBOARD
  46     #include "wx/clipbrd.h"
  47 #endif
  48
  49 #include "wx/textfile.h"
  50
  51 #include <windowsx.h>
  52
  53 #include "wx/msw/private.h"
  54
  55 #include <string.h>
  56 #include <stdlib.h>
  57 #include <sys/types.h>
  58
  59 #if wxUSE_RICHEDIT && (!defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__))
  60     #include <richedit.h>
  61 #endif
  62
  63 // old mingw32 doesn't define this
  64 #ifndef CFM_CHARSET
  65     #define CFM_CHARSET 0x08000000
  66 #endif // CFM_CHARSET
  67
  68 #ifndef CFM_BACKCOLOR
  69     #define CFM_BACKCOLOR 0x04000000
  70 #endif
  71
  72 // cygwin does not have these defined for richedit
  73 #ifndef ENM_LINK
  74     #define ENM_LINK 0x04000000
  75 #endif
  76
  77 #ifndef EM_AUTOURLDETECT
  78     #define EM_AUTOURLDETECT (WM_USER + 91)
  79 #endif
  80
  81 #ifndef EN_LINK
  82     #define EN_LINK 0x070b
  83
  84     typedef struct _enlink
  85     {
  86         NMHDR nmhdr;
  87         UINT msg;
  88         WPARAM wParam;
  89         LPARAM lParam;
  90         CHARRANGE chrg;
  91     } ENLINK;
  92 #endif // ENLINK
  93
  94 #ifndef SF_UNICODE
  95     #define SF_UNICODE 0x0010
  96 #endif
  97
  98 // ----------------------------------------------------------------------------
  99 // private functions
 100 // ----------------------------------------------------------------------------
 101
 102 #if wxUSE_RICHEDIT
 103
 104 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb);
 105
 106 #endif // wxUSE_RICHEDIT
 107
 108 // ----------------------------------------------------------------------------
 109 // private classes
 110 // ----------------------------------------------------------------------------
 111
 112 #if wxUSE_RICHEDIT
 113
 114 // this module initializes RichEdit DLL if needed
 115 class wxRichEditModule : public wxModule
 116 {
 117 public:
 118     virtual bool OnInit();
 119     virtual void OnExit();
 120
 121     // get the version currently loaded, -1 if none
 122     static int GetLoadedVersion() { return ms_verRichEdit; }
 123
 124     // load the richedit DLL of at least of required version
 125     static bool Load(int version = 1);
 126
 127 private:
 128     // the handle to richedit DLL and the version of the DLL loaded
 129     static HINSTANCE ms_hRichEdit;
 130
 131     // the DLL version loaded or -1 if none
 132     static int ms_verRichEdit;
 133
 134     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 135 };
 136
 137 HINSTANCE wxRichEditModule::ms_hRichEdit = (HINSTANCE)NULL;
 138 int       wxRichEditModule::ms_verRichEdit = -1;
 139
 140 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 141
 142 #endif // wxUSE_RICHEDIT
 143
 144 // ----------------------------------------------------------------------------
 145 // event tables and other macros
 146 // ----------------------------------------------------------------------------
 147
 148 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 149
 150 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 151     EVT_CHAR(wxTextCtrl::OnChar)
 152     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 153
 154     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 155     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 156     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 157     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 158     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 159
 160     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 161     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 162     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 163     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 164     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 165 #ifdef __WIN16__
 166     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 167 #endif
 168 END_EVENT_TABLE()
 169
 170 // ============================================================================
 171 // implementation
 172 // ============================================================================
 173
 174 // ----------------------------------------------------------------------------
 175 // creation
 176 // ----------------------------------------------------------------------------
 177
 178 void wxTextCtrl::Init()
 179 {
 180 #if wxUSE_RICHEDIT
 181     m_verRichEdit = 0;
 182 #endif
 183 }
 184
 185 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 186                         const wxString& value,
 187                         const wxPoint& pos,
 188                         const wxSize& size,
 189                         long style,
 190                         const wxValidator& validator,
 191                         const wxString& name)
 192 {
 193     // base initialization
 194     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 195         return FALSE;
 196
 197     if ( parent )
 198         parent->AddChild(this);
 199
 200     // translate wxWin style flags to MSW ones, checking for consistency while
 201     // doing it
 202     long msStyle = ES_LEFT | WS_TABSTOP;
 203
 204     if ( m_windowStyle & wxCLIP_SIBLINGS )
 205         msStyle |= WS_CLIPSIBLINGS;
 206
 207     if ( m_windowStyle & wxTE_MULTILINE )
 208     {
 209         wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 210                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 211
 212         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 213         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 214             msStyle |= WS_VSCROLL;
 215         m_windowStyle |= wxTE_PROCESS_ENTER;
 216     }
 217     else // !multiline
 218     {
 219         // there is really no reason to not have this style for single line
 220         // text controls
 221         msStyle |= ES_AUTOHSCROLL;
 222     }
 223
 224     if ( m_windowStyle & wxHSCROLL )
 225         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 226
 227     if ( m_windowStyle & wxTE_READONLY )
 228         msStyle |= ES_READONLY;
 229
 230     if ( m_windowStyle & wxTE_PASSWORD )
 231         msStyle |= ES_PASSWORD;
 232
 233     if ( m_windowStyle & wxTE_AUTO_SCROLL )
 234         msStyle |= ES_AUTOHSCROLL;
 235
 236     if ( m_windowStyle & wxTE_NOHIDESEL )
 237         msStyle |= ES_NOHIDESEL;
 238
 239     // we always want the characters and the arrows
 240     m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
 241
 242     // we may have several different cases:
 243     // 1. normal case: both TAB and ENTER are used for dialog navigation
 244     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
 245     //    control in the dialog
 246     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
 247     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
 248     //    the next control
 249     if ( m_windowStyle & wxTE_PROCESS_ENTER )
 250         m_lDlgCode |= DLGC_WANTMESSAGE;
 251     if ( m_windowStyle & wxTE_PROCESS_TAB )
 252         m_lDlgCode |= DLGC_WANTTAB;
 253
 254     // do create the control - either an EDIT or RICHEDIT
 255     wxString windowClass = wxT("EDIT");
 256
 257 #if wxUSE_RICHEDIT
 258     if ( m_windowStyle & wxTE_RICH )
 259     {
 260         static bool s_errorGiven = FALSE;   // MT-FIXME
 261
 262         // only give the error msg once if the DLL can't be loaded
 263         if ( !s_errorGiven )
 264         {
 265             // first try to load the RichEdit DLL (will do nothing if already
 266             // done)
 267             if ( !wxRichEditModule::Load() )
 268             {
 269                 wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 270
 271                 s_errorGiven = TRUE;
 272             }
 273         }
 274
 275         if ( !s_errorGiven )
 276         {
 277             msStyle |= ES_AUTOVSCROLL;
 278
 279             m_verRichEdit = wxRichEditModule::GetLoadedVersion();
 280             if ( m_verRichEdit == 1 )
 281             {
 282                 windowClass = wxT("RICHEDIT");
 283             }
 284             else
 285             {
 286 #ifndef RICHEDIT_CLASS
 287                 wxString RICHEDIT_CLASS;
 288                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 289 #if wxUSE_UNICODE
 290                 RICHEDIT_CLASS += _T('W');
 291 #else // ANSI
 292                 RICHEDIT_CLASS += _T('A');
 293 #endif // Unicode/ANSI
 294 #endif // !RICHEDIT_CLASS
 295
 296                 windowClass = RICHEDIT_CLASS;
 297             }
 298         }
 299     }
 300 #endif // wxUSE_RICHEDIT
 301
 302     // we need to turn '\n's into "\r\n"s for the multiline controls
 303     wxString valueWin;
 304     if ( m_windowStyle & wxTE_MULTILINE )
 305     {
 306         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 307     }
 308     else // single line
 309     {
 310         valueWin = value;
 311     }
 312
 313     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 314         return FALSE;
 315
 316     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 317
 318 #if wxUSE_RICHEDIT
 319     if ( IsRich() )
 320     {
 321         // have to enable events manually
 322         LPARAM mask = ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE;
 323
 324         if ( m_windowStyle & wxTE_AUTO_URL )
 325         {
 326             mask |= ENM_LINK;
 327
 328             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 329         }
 330
 331         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 332     }
 333 #endif // wxUSE_RICHEDIT
 334
 335     return TRUE;
 336 }
 337
 338 // Make sure the window style (etc.) reflects the HWND style (roughly)
 339 void wxTextCtrl::AdoptAttributesFromHWND()
 340 {
 341     wxWindow::AdoptAttributesFromHWND();
 342
 343     HWND hWnd = GetHwnd();
 344     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 345
 346     // retrieve the style to see whether this is an edit or richedit ctrl
 347 #if wxUSE_RICHEDIT
 348     wxString classname = wxGetWindowClass(GetHWND());
 349
 350     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 351     {
 352         m_verRichEdit = 0;
 353     }
 354     else // rich edit?
 355     {
 356         wxChar c;
 357         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 358         {
 359             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 360
 361             m_verRichEdit = 0;
 362         }
 363     }
 364 #endif // wxUSE_RICHEDIT
 365
 366     if (style & ES_MULTILINE)
 367         m_windowStyle |= wxTE_MULTILINE;
 368     if (style & ES_PASSWORD)
 369         m_windowStyle |= wxTE_PASSWORD;
 370     if (style & ES_READONLY)
 371         m_windowStyle |= wxTE_READONLY;
 372     if (style & ES_WANTRETURN)
 373         m_windowStyle |= wxTE_PROCESS_ENTER;
 374 }
 375
 376 // ----------------------------------------------------------------------------
 377 // set/get the controls text
 378 // ----------------------------------------------------------------------------
 379
 380 wxString wxTextCtrl::GetValue() const
 381 {
 382     // we can't use wxGetWindowText() (i.e. WM_GETTEXT internally) for
 383     // retrieving more than 64Kb under Win9x
 384 #if wxUSE_RICHEDIT
 385     if ( IsRich() )
 386     {
 387         wxString str;
 388
 389         int len = GetWindowTextLength(GetHwnd());
 390         if ( len )
 391         {
 392             // alloc one extra WORD as needed by the control
 393             wxChar *p = str.GetWriteBuf(++len);
 394
 395             TEXTRANGE textRange;
 396             textRange.chrg.cpMin = 0;
 397             textRange.chrg.cpMax = -1;
 398             textRange.lpstrText = p;
 399
 400             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 401
 402             // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for
 403             // the newlines which is neither Unix nor Windows style (Win95 with
 404             // riched20.dll shows this behaviour) - convert it to something
 405             // reasonable
 406             for ( ; *p; p++ )
 407             {
 408                 if ( *p == _T('\r') )
 409                     *p = _T('\n');
 410             }
 411
 412             str.UngetWriteBuf();
 413         }
 414         //else: no text at all, leave the string empty
 415
 416         return str;
 417     }
 418 #endif // wxUSE_RICHEDIT
 419
 420     // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 421     // same one as above for consitency
 422     wxString str = wxGetWindowText(GetHWND());
 423
 424     return wxTextFile::Translate(str, wxTextFileType_Unix);
 425 }
 426
 427 void wxTextCtrl::SetValue(const wxString& value)
 428 {
 429     // if the text is long enough, it's faster to just set it instead of first
 430     // comparing it with the old one (chances are that it will be different
 431     // anyhow, this comparison is there to avoid flicker for small single-line
 432     // edit controls mostly)
 433     if ( (value.length() > 0x400) || (value != GetValue()) )
 434     {
 435         // it is simpler to do this but it could be more efficient to reproduce
 436         // WriteText() logic here
 437         Clear();
 438
 439         WriteText(value);
 440
 441         // mark the control as being not dirty - we changed its text, not the
 442         // user
 443         DiscardEdits();
 444
 445         // for compatibility, don't move the cursor when doing SetValue()
 446         SetInsertionPoint(0);
 447     }
 448 }
 449
 450 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 451
 452 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 453 {
 454     *pcb = 0;
 455
 456     wchar_t *wbuf = (wchar_t *)buf;
 457     const wchar_t *wpc = *(const wchar_t **)dwCookie;
 458     while ( cb && *wpc )
 459     {
 460         *wbuf++ = *wpc++;
 461
 462         cb -= sizeof(wchar_t);
 463         (*pcb) += sizeof(wchar_t);
 464     }
 465
 466     *(const wchar_t **)dwCookie = wpc;
 467
 468     return 0;
 469 }
 470
 471 extern long wxEncodingToCodepage(wxFontEncoding encoding); // from strconv.cpp
 472
 473 #if wxUSE_UNICODE_MSLU
 474 bool wxTextCtrl::StreamIn(const wxString& value, wxFontEncoding WXUNUSED(encoding))
 475 {
 476     const wchar_t *wpc = value.c_str();
 477 #else
 478 bool wxTextCtrl::StreamIn(const wxString& value, wxFontEncoding encoding)
 479 {
 480     // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
 481     // text in the non default charset - otherwise it thinks it knows better
 482     // than we do and always shows it in the default one
 483
 484     // first get the Windows code page for this encoding
 485     long codepage = wxEncodingToCodepage(encoding);
 486     if ( codepage == -1 )
 487     {
 488         // unknown encoding
 489         return FALSE;
 490     }
 491
 492     // next translate to Unicode using this code page
 493     int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
 494     wxWCharBuffer wchBuf(len);
 495     if ( !::MultiByteToWideChar(codepage, 0, value, -1,
 496                                 (wchar_t *)wchBuf.data(), len) )
 497     {
 498         wxLogLastError(_T("MultiByteToWideChar"));
 499     }
 500
 501     // finally, stream it in the control
 502     const wchar_t *wpc = wchBuf;
 503 #endif // wxUSE_UNICODE_MSLU
 504
 505     EDITSTREAM eds;
 506     wxZeroMemory(eds);
 507     eds.dwCookie = (DWORD)&wpc;
 508     // the cast below is needed for broken (very) old mingw32 headers
 509     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 510
 511     if ( !::SendMessage(GetHwnd(), EM_STREAMIN,
 512                         SF_TEXT | SF_UNICODE | SFF_SELECTION,
 513                         (LPARAM)&eds) || eds.dwError )
 514     {
 515         wxLogLastError(_T("EM_STREAMIN"));
 516
 517         return FALSE;
 518     }
 519
 520     return TRUE;
 521 }
 522
 523 #endif // wxUSE_RICHEDIT
 524
 525 void wxTextCtrl::WriteText(const wxString& value)
 526 {
 527     wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 528
 529 #if wxUSE_RICHEDIT
 530     // there are several complications with the rich edit controls here
 531     bool done = FALSE;
 532     if ( IsRich() )
 533     {
 534         // first, ensure that the new text will be in the default style
 535         if ( !m_defaultStyle.IsDefault() )
 536         {
 537             long start, end;
 538             GetSelection(&start, &end);
 539             SetStyle(start, end, m_defaultStyle);
 540         }
 541
 542 #if wxUSE_UNICODE_MSLU
 543         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 544         // but EM_STREAMIN works
 545         if ( wxGetOsVersion() == wxWIN95 && GetRichVersion() > 1 )
 546         {
 547            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM);
 548         }
 549 #endif // wxUSE_UNICODE_MSLU
 550
 551 #if !wxUSE_UNICODE
 552         // next check if the text we're inserting must be shown in a non
 553         // default charset -- this only works for RichEdit > 1.0
 554         if ( GetRichVersion() > 1 )
 555         {
 556             wxFont font = m_defaultStyle.GetFont();
 557             if ( !font.Ok() )
 558                 font = GetFont();
 559
 560             if ( font.Ok() )
 561             {
 562                wxFontEncoding encoding = font.GetEncoding();
 563                if ( encoding != wxFONTENCODING_SYSTEM )
 564                {
 565                    done = StreamIn(valueDos, encoding);
 566                }
 567             }
 568         }
 569 #endif // !wxUSE_UNICODE
 570     }
 571
 572     if ( !done )
 573 #endif // wxUSE_RICHEDIT
 574     {
 575         ::SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 576     }
 577
 578     AdjustSpaceLimit();
 579 }
 580
 581 void wxTextCtrl::AppendText(const wxString& text)
 582 {
 583     SetInsertionPointEnd();
 584
 585     WriteText(text);
 586 }
 587
 588 void wxTextCtrl::Clear()
 589 {
 590     ::SetWindowText(GetHwnd(), wxT(""));
 591 }
 592
 593 // ----------------------------------------------------------------------------
 594 // Clipboard operations
 595 // ----------------------------------------------------------------------------
 596
 597 void wxTextCtrl::Copy()
 598 {
 599     if (CanCopy())
 600     {
 601         HWND hWnd = GetHwnd();
 602         SendMessage(hWnd, WM_COPY, 0, 0L);
 603     }
 604 }
 605
 606 void wxTextCtrl::Cut()
 607 {
 608     if (CanCut())
 609     {
 610         HWND hWnd = GetHwnd();
 611         SendMessage(hWnd, WM_CUT, 0, 0L);
 612     }
 613 }
 614
 615 void wxTextCtrl::Paste()
 616 {
 617     if (CanPaste())
 618     {
 619         HWND hWnd = GetHwnd();
 620         SendMessage(hWnd, WM_PASTE, 0, 0L);
 621     }
 622 }
 623
 624 bool wxTextCtrl::CanCopy() const
 625 {
 626     // Can copy if there's a selection
 627     long from, to;
 628     GetSelection(& from, & to);
 629     return (from != to) ;
 630 }
 631
 632 bool wxTextCtrl::CanCut() const
 633 {
 634     // Can cut if there's a selection
 635     long from, to;
 636     GetSelection(& from, & to);
 637     return (from != to) && (IsEditable());
 638 }
 639
 640 bool wxTextCtrl::CanPaste() const
 641 {
 642     if ( !IsEditable() )
 643         return FALSE;
 644
 645 #if wxUSE_RICHEDIT
 646     if ( IsRich() )
 647     {
 648         UINT cf = 0; // 0 == any format
 649
 650         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 651     }
 652 #endif // wxUSE_RICHEDIT
 653
 654     // Standard edit control: check for straight text on clipboard
 655     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 656         return FALSE;
 657
 658     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 659     ::CloseClipboard();
 660
 661     return isTextAvailable;
 662 }
 663
 664 // ----------------------------------------------------------------------------
 665 // Accessors
 666 // ----------------------------------------------------------------------------
 667
 668 void wxTextCtrl::SetEditable(bool editable)
 669 {
 670     HWND hWnd = GetHwnd();
 671     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 672 }
 673
 674 void wxTextCtrl::SetInsertionPoint(long pos)
 675 {
 676     SetSelection(pos, pos);
 677 }
 678
 679 void wxTextCtrl::SetInsertionPointEnd()
 680 {
 681     long pos = GetLastPosition();
 682     SetInsertionPoint(pos);
 683 }
 684
 685 long wxTextCtrl::GetInsertionPoint() const
 686 {
 687 #if wxUSE_RICHEDIT
 688     if ( IsRich() )
 689     {
 690         CHARRANGE range;
 691         range.cpMin = 0;
 692         range.cpMax = 0;
 693         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 694         return range.cpMin;
 695     }
 696 #endif // wxUSE_RICHEDIT
 697
 698     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 699     return Pos & 0xFFFF;
 700 }
 701
 702 long wxTextCtrl::GetLastPosition() const
 703 {
 704     HWND hWnd = GetHwnd();
 705
 706     // Will always return a number > 0 (according to docs)
 707     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 708
 709     // This gets the char index for the _beginning_ of the last line
 710     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 711
 712     // Get number of characters in the last line. We'll add this to the character
 713     // index for the last line, 1st position.
 714     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 715
 716     return (long)(charIndex + lineLength);
 717 }
 718
 719 // If the return values from and to are the same, there is no
 720 // selection.
 721 void wxTextCtrl::GetSelection(long* from, long* to) const
 722 {
 723 #if wxUSE_RICHEDIT
 724     if ( IsRich() )
 725     {
 726         CHARRANGE charRange;
 727         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 728
 729         *from = charRange.cpMin;
 730         *to = charRange.cpMax;
 731     }
 732     else
 733 #endif // !wxUSE_RICHEDIT
 734     {
 735         DWORD dwStart, dwEnd;
 736         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 737
 738         *from = dwStart;
 739         *to = dwEnd;
 740     }
 741 }
 742
 743 wxString wxTextCtrl::GetStringSelection() const
 744 {
 745     // the base class version works correctly for the rich text controls
 746     // because there the lines are terminated with just '\r' which means that
 747     // the string length is not changed in the result of the translations doen
 748     // in GetValue() but for the normal ones when we replace "\r\n" with '\n'
 749     // we break the indices
 750 #if wxUSE_RICHEDIT
 751     if ( IsRich() )
 752         return wxTextCtrlBase::GetStringSelection();
 753 #endif // wxUSE_RICHEDIT
 754
 755     long from, to;
 756     GetSelection(&from, &to);
 757
 758     wxString str;
 759     if ( from < to )
 760     {
 761         str = wxGetWindowText(GetHWND()).Mid(from, to - from);
 762
 763         // and now that we have the correct selection, convert it to the
 764         // correct format
 765         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 766     }
 767
 768     return str;
 769 }
 770
 771 bool wxTextCtrl::IsEditable() const
 772 {
 773     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 774
 775     return ((style & ES_READONLY) == 0);
 776 }
 777
 778 // ----------------------------------------------------------------------------
 779 // selection
 780 // ----------------------------------------------------------------------------
 781
 782 void wxTextCtrl::SetSelection(long from, long to)
 783 {
 784     DoSetSelection(from, to);
 785 }
 786
 787 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 788 {
 789     // if from and to are both -1, it means (in wxWindows) that all text should
 790     // be selected - translate into Windows convention
 791     if ( (from == -1) && (to == -1) )
 792     {
 793         from = 0;
 794         to = -1;
 795     }
 796
 797     HWND hWnd = GetHwnd();
 798
 799 #ifdef __WIN32__
 800 #if wxUSE_RICHEDIT
 801     if ( IsRich() )
 802     {
 803         CHARRANGE range;
 804         range.cpMin = from;
 805         range.cpMax = to;
 806         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 807     }
 808     else
 809 #endif // wxUSE_RICHEDIT
 810     {
 811         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
 812     }
 813
 814     if ( scrollCaret )
 815     {
 816 #if wxUSE_RICHEDIT
 817         // EM_SCROLLCARET doesn't work for me with the richedit controls
 818         // unless it has focus although I don't see any mention of it in the
 819         // docs - this is the only workaround I found. Of course it's not
 820         // perfect as it adds the dummy focus set/kill events but it's still
 821         // better than nothing
 822         HWND hwndFocusOld;
 823         if ( IsRich() )
 824         {
 825             hwndFocusOld = ::GetFocus();
 826             if ( hwndFocusOld == GetHwnd() )
 827             {
 828                 // don't change focus
 829                 hwndFocusOld = 0;
 830             }
 831
 832             if ( hwndFocusOld )
 833             {
 834                 ::SetFocus(GetHwnd());
 835             }
 836         }
 837         else // not rich
 838         {
 839             hwndFocusOld = 0;
 840         }
 841 #endif // wxUSE_RICHEDIT
 842
 843         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 844
 845 #if wxUSE_RICHEDIT
 846         if ( hwndFocusOld )
 847         {
 848             ::SetFocus(hwndFocusOld);
 849         }
 850 #endif // wxUSE_RICHEDIT
 851     }
 852 #else // Win16
 853     // WPARAM is 0: selection is scrolled into view
 854     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
 855 #endif // Win32/16
 856 }
 857
 858 // ----------------------------------------------------------------------------
 859 // Editing
 860 // ----------------------------------------------------------------------------
 861
 862 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 863 {
 864     // Set selection and remove it
 865     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
 866
 867     SendMessage(GetHwnd(), EM_REPLACESEL,
 868 #ifdef __WIN32__
 869                 TRUE,
 870 #else
 871                 FALSE,
 872 #endif
 873                 (LPARAM)value.c_str());
 874 }
 875
 876 void wxTextCtrl::Remove(long from, long to)
 877 {
 878     Replace(from, to, _T(""));
 879 }
 880
 881 bool wxTextCtrl::LoadFile(const wxString& file)
 882 {
 883     if ( wxTextCtrlBase::LoadFile(file) )
 884     {
 885         // update the size limit if needed
 886         AdjustSpaceLimit();
 887
 888         return TRUE;
 889     }
 890
 891     return FALSE;
 892 }
 893
 894 bool wxTextCtrl::IsModified() const
 895 {
 896     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 897 }
 898
 899 // Makes 'unmodified'
 900 void wxTextCtrl::DiscardEdits()
 901 {
 902     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 903 }
 904
 905 int wxTextCtrl::GetNumberOfLines() const
 906 {
 907     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 908 }
 909
 910 long wxTextCtrl::XYToPosition(long x, long y) const
 911 {
 912     HWND hWnd = GetHwnd();
 913
 914     // This gets the char index for the _beginning_ of this line
 915     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 916     return (long)(x + charIndex);
 917 }
 918
 919 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 920 {
 921     HWND hWnd = GetHwnd();
 922
 923     // This gets the line number containing the character
 924     int lineNo;
 925 #if wxUSE_RICHEDIT
 926     if ( IsRich() )
 927     {
 928         lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 929     }
 930     else
 931 #endif // wxUSE_RICHEDIT
 932         lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 933
 934     if ( lineNo == -1 )
 935     {
 936         // no such line
 937         return FALSE;
 938     }
 939
 940     // This gets the char index for the _beginning_ of this line
 941     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 942     if ( charIndex == -1 )
 943     {
 944         return FALSE;
 945     }
 946
 947     // The X position must therefore be the different between pos and charIndex
 948     if ( x )
 949         *x = (long)(pos - charIndex);
 950     if ( y )
 951         *y = (long)lineNo;
 952
 953     return TRUE;
 954 }
 955
 956 void wxTextCtrl::ShowPosition(long pos)
 957 {
 958     HWND hWnd = GetHwnd();
 959
 960     // To scroll to a position, we pass the number of lines and characters
 961     // to scroll *by*. This means that we need to:
 962     // (1) Find the line position of the current line.
 963     // (2) Find the line position of pos.
 964     // (3) Scroll by (pos - current).
 965     // For now, ignore the horizontal scrolling.
 966
 967     // Is this where scrolling is relative to - the line containing the caret?
 968     // Or is the first visible line??? Try first visible line.
 969 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 970
 971     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 972
 973     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 974
 975     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 976
 977     if (linesToScroll != 0)
 978       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 979 }
 980
 981 int wxTextCtrl::GetLineLength(long lineNo) const
 982 {
 983     long charIndex = XYToPosition(0, lineNo);
 984     int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
 985     return len;
 986 }
 987
 988 wxString wxTextCtrl::GetLineText(long lineNo) const
 989 {
 990     size_t len = (size_t)GetLineLength(lineNo) + 1;
 991
 992     // there must be at least enough place for the length WORD in the
 993     // buffer
 994     len += sizeof(WORD);
 995
 996     wxString str;
 997     wxChar *buf = str.GetWriteBuf(len);
 998
 999     *(WORD *)buf = (WORD)len;
1000     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1001     buf[len] = 0;
1002
1003     str.UngetWriteBuf(len);
1004
1005     return str;
1006 }
1007
1008 void wxTextCtrl::SetMaxLength(unsigned long len)
1009 {
1010     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1011 }
1012
1013 // ----------------------------------------------------------------------------
1014 // Undo/redo
1015 // ----------------------------------------------------------------------------
1016
1017 void wxTextCtrl::Undo()
1018 {
1019     if (CanUndo())
1020     {
1021         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1022     }
1023 }
1024
1025 void wxTextCtrl::Redo()
1026 {
1027     if (CanRedo())
1028     {
1029         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1030         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1031     }
1032 }
1033
1034 bool wxTextCtrl::CanUndo() const
1035 {
1036     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
1037 }
1038
1039 bool wxTextCtrl::CanRedo() const
1040 {
1041     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
1042 }
1043
1044 // ----------------------------------------------------------------------------
1045 // implemenation details
1046 // ----------------------------------------------------------------------------
1047
1048 void wxTextCtrl::Command(wxCommandEvent & event)
1049 {
1050     SetValue(event.GetString());
1051     ProcessCommand (event);
1052 }
1053
1054 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1055 {
1056     // By default, load the first file into the text window.
1057     if (event.GetNumberOfFiles() > 0)
1058     {
1059         LoadFile(event.GetFiles()[0]);
1060     }
1061 }
1062
1063 // ----------------------------------------------------------------------------
1064 // kbd input processing
1065 // ----------------------------------------------------------------------------
1066
1067 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1068 {
1069     MSG *msg = (MSG *)pMsg;
1070
1071     // check for our special keys here: if we don't do it and the parent frame
1072     // uses them as accelerators, they wouldn't work at all, so we disable
1073     // usual preprocessing for them
1074     if ( msg->message == WM_KEYDOWN )
1075     {
1076         WORD vkey = msg->wParam;
1077         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1078         {
1079             if ( vkey == VK_BACK )
1080                 return FALSE;
1081         }
1082         else // no Alt
1083         {
1084             if ( wxIsCtrlDown() )
1085             {
1086                 switch ( vkey )
1087                 {
1088                     case 'C':
1089                     case 'V':
1090                     case 'X':
1091                     case VK_INSERT:
1092                     case VK_DELETE:
1093                     case VK_HOME:
1094                     case VK_END:
1095                         return FALSE;
1096                 }
1097             }
1098             else if ( wxIsShiftDown() )
1099             {
1100                 if ( vkey == VK_INSERT || vkey == VK_DELETE )
1101                     return FALSE;
1102             }
1103         }
1104     }
1105
1106     return wxControl::MSWShouldPreProcessMessage(pMsg);
1107 }
1108
1109 void wxTextCtrl::OnChar(wxKeyEvent& event)
1110 {
1111     switch ( event.KeyCode() )
1112     {
1113         case WXK_RETURN:
1114             if ( !(m_windowStyle & wxTE_MULTILINE) )
1115             {
1116                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1117                 InitCommandEvent(event);
1118                 event.SetString(GetValue());
1119                 if ( GetEventHandler()->ProcessEvent(event) )
1120                     return;
1121             }
1122             //else: multiline controls need Enter for themselves
1123
1124             break;
1125
1126         case WXK_TAB:
1127             // always produce navigation event - even if we process TAB
1128             // ourselves the fact that we got here means that the user code
1129             // decided to skip processing of this TAB - probably to let it
1130             // do its default job.
1131             {
1132                 wxNavigationKeyEvent eventNav;
1133                 eventNav.SetDirection(!event.ShiftDown());
1134                 eventNav.SetWindowChange(event.ControlDown());
1135                 eventNav.SetEventObject(this);
1136
1137                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1138                     return;
1139             }
1140             break;
1141     }
1142
1143     // no, we didn't process it
1144     event.Skip();
1145 }
1146
1147 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1148 {
1149     switch (param)
1150     {
1151         case EN_SETFOCUS:
1152         case EN_KILLFOCUS:
1153             {
1154                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1155                                                          : wxEVT_SET_FOCUS,
1156                                    m_windowId);
1157                 event.SetEventObject( this );
1158                 GetEventHandler()->ProcessEvent(event);
1159             }
1160             break;
1161
1162         case EN_CHANGE:
1163             {
1164                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1165                 InitCommandEvent(event);
1166                 event.SetString(GetValue());
1167                 ProcessCommand(event);
1168             }
1169             break;
1170
1171         case EN_MAXTEXT:
1172             // the text size limit has been hit - increase it
1173             if ( !AdjustSpaceLimit() )
1174             {
1175                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1176                 InitCommandEvent(event);
1177                 event.SetString(GetValue());
1178                 ProcessCommand(event);
1179             }
1180             break;
1181
1182             // the other notification messages are not processed
1183         case EN_UPDATE:
1184         case EN_ERRSPACE:
1185         case EN_HSCROLL:
1186         case EN_VSCROLL:
1187             return FALSE;
1188         default:
1189             return FALSE;
1190     }
1191
1192     // processed
1193     return TRUE;
1194 }
1195
1196 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1197 #if wxUSE_CTL3D
1198                                WXUINT message,
1199                                WXWPARAM wParam,
1200                                WXLPARAM lParam
1201 #else
1202                                WXUINT WXUNUSED(message),
1203                                WXWPARAM WXUNUSED(wParam),
1204                                WXLPARAM WXUNUSED(lParam)
1205 #endif
1206     )
1207 {
1208 #if wxUSE_CTL3D
1209     if ( m_useCtl3D )
1210     {
1211         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1212         return (WXHBRUSH) hbrush;
1213     }
1214 #endif // wxUSE_CTL3D
1215
1216     HDC hdc = (HDC)pDC;
1217     if (GetParent()->GetTransparentBackground())
1218         SetBkMode(hdc, TRANSPARENT);
1219     else
1220         SetBkMode(hdc, OPAQUE);
1221
1222     wxColour colBack = GetBackgroundColour();
1223
1224     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1225         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1226
1227     ::SetBkColor(hdc, wxColourToRGB(colBack));
1228     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1229
1230     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1231
1232     return (WXHBRUSH)brush->GetResourceHandle();
1233 }
1234
1235 // In WIN16, need to override normal erasing because
1236 // Ctl3D doesn't use the wxWindows background colour.
1237 #ifdef __WIN16__
1238 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1239 {
1240     wxColour col(m_backgroundColour);
1241
1242 #if wxUSE_CTL3D
1243     if (m_useCtl3D)
1244         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1245 #endif
1246
1247     RECT rect;
1248     ::GetClientRect(GetHwnd(), &rect);
1249
1250     COLORREF ref = PALETTERGB(col.Red(),
1251                               col.Green(),
1252                               col.Blue());
1253     HBRUSH hBrush = ::CreateSolidBrush(ref);
1254     if ( !hBrush )
1255         wxLogLastError(wxT("CreateSolidBrush"));
1256
1257     HDC hdc = (HDC)event.GetDC()->GetHDC();
1258
1259     int mode = ::SetMapMode(hdc, MM_TEXT);
1260
1261     ::FillRect(hdc, &rect, hBrush);
1262     ::DeleteObject(hBrush);
1263     ::SetMapMode(hdc, mode);
1264
1265 }
1266 #endif // Win16
1267
1268 bool wxTextCtrl::AdjustSpaceLimit()
1269 {
1270 #ifndef __WIN16__
1271     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1272
1273     // HACK: we try to automatically extend the limit for the amount of text
1274     //       to allow (interactively) entering more than 64Kb of text under
1275     //       Win9x but we shouldn't reset the text limit which was previously
1276     //       set explicitly with SetMaxLength()
1277     //
1278     //       we could solve this by storing the limit we set in wxTextCtrl but
1279     //       to save space we prefer to simply test here the actual limit
1280     //       value: we consider that SetMaxLength() can only be called for
1281     //       values < 32Kb
1282     if ( limit < 0x8000 )
1283     {
1284         // we've got more text than limit set by SetMaxLength()
1285         return FALSE;
1286     }
1287
1288     unsigned int len = ::GetWindowTextLength(GetHwnd());
1289     if ( len >= limit )
1290     {
1291         limit = len + 0x8000;    // 32Kb
1292
1293 #if wxUSE_RICHEDIT
1294         if ( IsRich() )
1295         {
1296             // as a nice side effect, this also allows passing limit > 64Kb
1297             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1298         }
1299         else
1300 #endif // wxUSE_RICHEDIT
1301         {
1302             if ( limit > 0xffff )
1303             {
1304                 // this will set it to a platform-dependent maximum (much more
1305                 // than 64Kb under NT)
1306                 limit = 0;
1307             }
1308
1309             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1310         }
1311     }
1312 #endif // !Win16
1313
1314     // we changed the limit
1315     return TRUE;
1316 }
1317
1318 bool wxTextCtrl::AcceptsFocus() const
1319 {
1320     // we don't want focus if we can't be edited
1321     return IsEditable() && wxControl::AcceptsFocus();
1322 }
1323
1324 wxSize wxTextCtrl::DoGetBestSize() const
1325 {
1326     int cx, cy;
1327     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1328
1329     int wText = DEFAULT_ITEM_WIDTH;
1330
1331     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1332     if ( m_windowStyle & wxTE_MULTILINE )
1333     {
1334         hText *= wxMax(GetNumberOfLines(), 5);
1335     }
1336     //else: for single line control everything is ok
1337
1338     return wxSize(wText, hText);
1339 }
1340
1341 // ----------------------------------------------------------------------------
1342 // standard handlers for standard edit menu events
1343 // ----------------------------------------------------------------------------
1344
1345 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1346 {
1347     Cut();
1348 }
1349
1350 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1351 {
1352     Copy();
1353 }
1354
1355 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1356 {
1357     Paste();
1358 }
1359
1360 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1361 {
1362     Undo();
1363 }
1364
1365 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1366 {
1367     Redo();
1368 }
1369
1370 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1371 {
1372     event.Enable( CanCut() );
1373 }
1374
1375 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1376 {
1377     event.Enable( CanCopy() );
1378 }
1379
1380 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1381 {
1382     event.Enable( CanPaste() );
1383 }
1384
1385 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1386 {
1387     event.Enable( CanUndo() );
1388 }
1389
1390 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1391 {
1392     event.Enable( CanRedo() );
1393 }
1394
1395 // the rest of the file only deals with the rich edit controls
1396 #if wxUSE_RICHEDIT
1397
1398 // ----------------------------------------------------------------------------
1399 // EN_LINK processing
1400 // ----------------------------------------------------------------------------
1401
1402 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1403 {
1404     NMHDR *hdr = (NMHDR* )lParam;
1405     if ( hdr->code == EN_LINK )
1406     {
1407         ENLINK *enlink = (ENLINK *)hdr;
1408
1409         switch ( enlink->msg )
1410         {
1411             case WM_SETCURSOR:
1412                 // ok, so it is hardcoded - do we really nee to customize it?
1413                 ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1414                 *result = TRUE;
1415                 break;
1416
1417             case WM_MOUSEMOVE:
1418             case WM_LBUTTONDOWN:
1419             case WM_LBUTTONUP:
1420             case WM_LBUTTONDBLCLK:
1421             case WM_RBUTTONDOWN:
1422             case WM_RBUTTONUP:
1423             case WM_RBUTTONDBLCLK:
1424                 // send a mouse event
1425                 {
1426                     static const wxEventType eventsMouse[] =
1427                     {
1428                         wxEVT_MOTION,
1429                         wxEVT_LEFT_DOWN,
1430                         wxEVT_LEFT_UP,
1431                         wxEVT_LEFT_DCLICK,
1432                         wxEVT_RIGHT_DOWN,
1433                         wxEVT_RIGHT_UP,
1434                         wxEVT_RIGHT_DCLICK,
1435                     };
1436
1437                     // the event ids are consecutive
1438                     wxMouseEvent
1439                         evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1440
1441                     InitMouseEvent(evtMouse,
1442                                    GET_X_LPARAM(enlink->lParam),
1443                                    GET_Y_LPARAM(enlink->lParam),
1444                                    enlink->wParam);
1445
1446                     wxTextUrlEvent event(m_windowId, evtMouse,
1447                                          enlink->chrg.cpMin,
1448                                          enlink->chrg.cpMax);
1449
1450                     InitCommandEvent(event);
1451
1452                     *result = ProcessCommand(event);
1453                 }
1454                 break;
1455         }
1456
1457         return TRUE;
1458     }
1459
1460     // not processed
1461     return FALSE;
1462 }
1463
1464 // ----------------------------------------------------------------------------
1465 // colour setting for the rich edit controls
1466 // ----------------------------------------------------------------------------
1467
1468 // Watcom C++ doesn't define this
1469 #ifndef SCF_ALL
1470 #define SCF_ALL 0x0004
1471 #endif
1472
1473 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1474 {
1475     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1476     {
1477         // colour didn't really change
1478         return FALSE;
1479     }
1480
1481     if ( IsRich() )
1482     {
1483         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1484         // EM_SETBKGNDCOLOR additionally
1485         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1486     }
1487
1488     return TRUE;
1489 }
1490
1491 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1492 {
1493     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1494     {
1495         // colour didn't really change
1496         return FALSE;
1497     }
1498
1499     if ( IsRich() )
1500     {
1501         // change the colour of everything
1502         CHARFORMAT cf;
1503         wxZeroMemory(cf);
1504         cf.cbSize = sizeof(cf);
1505         cf.dwMask = CFM_COLOR;
1506         cf.crTextColor = wxColourToRGB(colour);
1507         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1508     }
1509
1510     return TRUE;
1511 }
1512
1513 // ----------------------------------------------------------------------------
1514 // styling support for rich edit controls
1515 // ----------------------------------------------------------------------------
1516
1517 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1518 {
1519     if ( !IsRich() )
1520     {
1521         // can't do it with normal text control
1522         return FALSE;
1523     }
1524
1525     // the rich text control doesn't handle setting background colour, so don't
1526     // even try if it's the only thing we want to change
1527     if ( wxRichEditModule::GetLoadedVersion() < 2 &&
1528          !style.HasFont() && !style.HasTextColour() )
1529     {
1530         // nothing to do: return TRUE if there was really nothing to do and
1531         // FALSE if we failed to set bg colour
1532         return !style.HasBackgroundColour();
1533     }
1534
1535     // order the range if needed
1536     if ( start > end )
1537     {
1538         long tmp = start;
1539         start = end;
1540         end = tmp;
1541     }
1542
1543     // we can only change the format of the selection, so select the range we
1544     // want and restore the old selection later
1545     long startOld, endOld;
1546     GetSelection(&startOld, &endOld);
1547
1548     // but do we really have to change the selection?
1549     bool changeSel = start != startOld || end != endOld;
1550
1551     if ( changeSel )
1552     {
1553         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
1554     }
1555
1556     // initialize CHARFORMAT struct
1557 #if wxUSE_RICHEDIT2
1558     CHARFORMAT2 cf;
1559 #else
1560     CHARFORMAT cf;
1561 #endif
1562     wxZeroMemory(cf);
1563     cf.cbSize = sizeof(cf);
1564
1565     if ( style.HasFont() )
1566     {
1567         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1568         //     but using it doesn't seem to hurt neither so leaving it for now
1569
1570         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1571                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1572
1573         // fill in data from LOGFONT but recalculate lfHeight because we need
1574         // the real height in twips and not the negative number which
1575         // wxFillLogFont() returns (this is correct in general and works with
1576         // the Windows font mapper, but not here)
1577         LOGFONT lf;
1578         wxFillLogFont(&lf, &style.GetFont());
1579         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1580         cf.bCharSet = lf.lfCharSet;
1581         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1582         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1583
1584         // also deal with underline/italic/bold attributes: note that we must
1585         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1586         // style to allow clearing it
1587         if ( lf.lfItalic )
1588         {
1589             cf.dwEffects |= CFE_ITALIC;
1590         }
1591
1592         if ( lf.lfWeight == FW_BOLD )
1593         {
1594             cf.dwEffects |= CFE_BOLD;
1595         }
1596
1597         if ( lf.lfUnderline )
1598         {
1599             cf.dwEffects |= CFE_UNDERLINE;
1600         }
1601
1602         // strikeout fonts are not supported by wxWindows
1603     }
1604
1605     if ( style.HasTextColour() )
1606     {
1607         cf.dwMask |= CFM_COLOR;
1608         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1609     }
1610
1611 #if wxUSE_RICHEDIT2
1612     if ( wxRichEditModule::GetLoadedVersion() > 1 && style.HasBackgroundColour() )
1613     {
1614         cf.dwMask |= CFM_BACKCOLOR;
1615         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1616     }
1617 #endif // wxUSE_RICHEDIT2
1618
1619     // do format the selection
1620     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1621                             SCF_SELECTION, (LPARAM)&cf) != 0;
1622     if ( !ok )
1623     {
1624         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1625     }
1626
1627     if ( changeSel )
1628     {
1629         // restore the original selection
1630         DoSetSelection(startOld, endOld, FALSE);
1631     }
1632
1633     return ok;
1634 }
1635
1636 // ----------------------------------------------------------------------------
1637 // wxRichEditModule
1638 // ----------------------------------------------------------------------------
1639
1640 bool wxRichEditModule::OnInit()
1641 {
1642     // don't do anything - we will load it when needed
1643     return TRUE;
1644 }
1645
1646 void wxRichEditModule::OnExit()
1647 {
1648     if ( ms_hRichEdit )
1649     {
1650         FreeLibrary(ms_hRichEdit);
1651     }
1652 }
1653
1654 /* static */
1655 bool wxRichEditModule::Load(int version)
1656 {
1657     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1658                  _T("incorrect richedit control version requested") );
1659
1660     if ( version <= ms_verRichEdit )
1661     {
1662         // we've already got this or better
1663         return TRUE;
1664     }
1665
1666     if ( ms_hRichEdit )
1667     {
1668         ::FreeLibrary(ms_hRichEdit);
1669     }
1670
1671     // always try load riched20.dll first - like this we won't have to reload
1672     // it later if we're first asked for RE 1 and then for RE 2 or 3
1673     wxString dllname = _T("riched20.dll");
1674     ms_hRichEdit = ::LoadLibrary(dllname);
1675     ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
1676
1677     if ( !ms_hRichEdit && (version == 1) )
1678     {
1679         // fall back to RE 1
1680         dllname = _T("riched32.dll");
1681         ms_hRichEdit = ::LoadLibrary(dllname);
1682         ms_verRichEdit = 1;
1683     }
1684
1685     if ( !ms_hRichEdit )
1686     {
1687         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1688
1689         ms_verRichEdit = -1;
1690
1691         return FALSE;
1692     }
1693
1694     return TRUE;
1695 }
1696
1697 #endif // wxUSE_RICHEDIT
1698
1699 #endif // wxUSE_TEXTCTRL