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 // Watcom C++ doesn't define this
  99 #ifndef SCF_ALL
 100 #define SCF_ALL 0x0004
 101 #endif
 102
 103 // ----------------------------------------------------------------------------
 104 // private functions
 105 // ----------------------------------------------------------------------------
 106
 107 #if wxUSE_RICHEDIT
 108
 109 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb);
 110
 111 #endif // wxUSE_RICHEDIT
 112
 113 // ----------------------------------------------------------------------------
 114 // private classes
 115 // ----------------------------------------------------------------------------
 116
 117 #if wxUSE_RICHEDIT
 118
 119 // this module initializes RichEdit DLL(s) if needed
 120 class wxRichEditModule : public wxModule
 121 {
 122 public:
 123     virtual bool OnInit();
 124     virtual void OnExit();
 125
 126     // load the richedit DLL of at least of required version
 127     static bool Load(int version = 1);
 128
 129 private:
 130     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
 131     static HINSTANCE ms_hRichEdit[2];
 132
 133     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 134 };
 135
 136 HINSTANCE wxRichEditModule::ms_hRichEdit[2] = { NULL, NULL };
 137
 138 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 139
 140 #endif // wxUSE_RICHEDIT
 141
 142 // ----------------------------------------------------------------------------
 143 // event tables and other macros
 144 // ----------------------------------------------------------------------------
 145
 146 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 147
 148 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 149     EVT_CHAR(wxTextCtrl::OnChar)
 150     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 151
 152     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 153     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 154     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 155     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 156     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 157
 158     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 159     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 160     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 161     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 162     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 163 #ifdef __WIN16__
 164     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 165 #endif
 166 END_EVENT_TABLE()
 167
 168 // ============================================================================
 169 // implementation
 170 // ============================================================================
 171
 172 // ----------------------------------------------------------------------------
 173 // creation
 174 // ----------------------------------------------------------------------------
 175
 176 void wxTextCtrl::Init()
 177 {
 178 #if wxUSE_RICHEDIT
 179     m_verRichEdit = 0;
 180 #endif
 181 }
 182
 183 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 184                         const wxString& value,
 185                         const wxPoint& pos,
 186                         const wxSize& size,
 187                         long style,
 188                         const wxValidator& validator,
 189                         const wxString& name)
 190 {
 191     // base initialization
 192     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 193         return FALSE;
 194
 195     if ( parent )
 196         parent->AddChild(this);
 197
 198     // translate wxWin style flags to MSW ones
 199     WXDWORD msStyle = MSWGetCreateWindowFlags();
 200
 201     // do create the control - either an EDIT or RICHEDIT
 202     wxString windowClass = wxT("EDIT");
 203
 204 #if wxUSE_RICHEDIT
 205     if ( m_windowStyle & wxTE_AUTO_URL )
 206     {
 207         // automatic URL detection only works in RichEdit 2.0+
 208         m_windowStyle |= wxTE_RICH2;
 209     }
 210
 211     if ( m_windowStyle & wxTE_RICH2 )
 212     {
 213         // using richedit 2.0 implies using wxTE_RICH
 214         m_windowStyle |= wxTE_RICH;
 215     }
 216
 217     // we need to load the richedit DLL before creating the rich edit control
 218     if ( m_windowStyle & wxTE_RICH )
 219     {
 220         static bool s_errorGiven = FALSE;// MT-FIXME
 221
 222         // Which version do we need? Use 1.0 by default because it is much more
 223         // like the the standard EDIT or 2.0 if explicitly requested, but use
 224         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 225         //
 226         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 227         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 228         //       should use 3.0 if available as it is the best of both worlds -
 229         //       but as I can't test it right now I don't do it (VZ)
 230 #if wxUSE_UNICODE
 231         const int verRichEdit = 2;
 232 #else // !wxUSE_UNICODE
 233         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 234 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 235
 236         // only give the error msg once if the DLL can't be loaded
 237         if ( !s_errorGiven )
 238         {
 239             // try to load the RichEdit DLL (will do nothing if already done)
 240             if ( !wxRichEditModule::Load(verRichEdit) )
 241             {
 242 #if !wxUSE_UNICODE
 243                 // try another version?
 244                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 245
 246                 if ( !wxRichEditModule::Load(verRichEdit) )
 247 #endif // wxUSE_UNICODE
 248                 {
 249                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 250
 251                     s_errorGiven = TRUE;
 252                 }
 253             }
 254         }
 255
 256         // have we managed to load any richedit version?
 257         if ( !s_errorGiven )
 258         {
 259             msStyle |= ES_AUTOVSCROLL;
 260
 261             m_verRichEdit = verRichEdit;
 262             if ( m_verRichEdit == 1 )
 263             {
 264                 windowClass = wxT("RICHEDIT");
 265             }
 266             else
 267             {
 268 #ifndef RICHEDIT_CLASS
 269                 wxString RICHEDIT_CLASS;
 270                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 271 #if wxUSE_UNICODE
 272                 RICHEDIT_CLASS += _T('W');
 273 #else // ANSI
 274                 RICHEDIT_CLASS += _T('A');
 275 #endif // Unicode/ANSI
 276 #endif // !RICHEDIT_CLASS
 277
 278                 windowClass = RICHEDIT_CLASS;
 279             }
 280         }
 281     }
 282 #endif // wxUSE_RICHEDIT
 283
 284     // we need to turn '\n's into "\r\n"s for the multiline controls
 285     wxString valueWin;
 286     if ( m_windowStyle & wxTE_MULTILINE )
 287     {
 288         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 289     }
 290     else // single line
 291     {
 292         valueWin = value;
 293     }
 294
 295     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 296         return FALSE;
 297
 298     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 299
 300 #if wxUSE_RICHEDIT
 301     if ( IsRich() )
 302     {
 303         // have to enable events manually
 304         LPARAM mask = ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE;
 305
 306         if ( m_windowStyle & wxTE_AUTO_URL )
 307         {
 308             mask |= ENM_LINK;
 309
 310             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 311         }
 312
 313         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 314     }
 315 #endif // wxUSE_RICHEDIT
 316
 317     return TRUE;
 318 }
 319
 320 // Make sure the window style (etc.) reflects the HWND style (roughly)
 321 void wxTextCtrl::AdoptAttributesFromHWND()
 322 {
 323     wxWindow::AdoptAttributesFromHWND();
 324
 325     HWND hWnd = GetHwnd();
 326     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 327
 328     // retrieve the style to see whether this is an edit or richedit ctrl
 329 #if wxUSE_RICHEDIT
 330     wxString classname = wxGetWindowClass(GetHWND());
 331
 332     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 333     {
 334         m_verRichEdit = 0;
 335     }
 336     else // rich edit?
 337     {
 338         wxChar c;
 339         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 340         {
 341             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 342
 343             m_verRichEdit = 0;
 344         }
 345     }
 346 #endif // wxUSE_RICHEDIT
 347
 348     if (style & ES_MULTILINE)
 349         m_windowStyle |= wxTE_MULTILINE;
 350     if (style & ES_PASSWORD)
 351         m_windowStyle |= wxTE_PASSWORD;
 352     if (style & ES_READONLY)
 353         m_windowStyle |= wxTE_READONLY;
 354     if (style & ES_WANTRETURN)
 355         m_windowStyle |= wxTE_PROCESS_ENTER;
 356 }
 357
 358 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 359 {
 360     // default border for the text controls is the sunken one
 361     if ( (style & wxBORDER_MASK) == wxBORDER_DEFAULT )
 362     {
 363         style |= wxBORDER_SUNKEN;
 364     }
 365
 366     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 367
 368     // default styles
 369     msStyle |= ES_LEFT;
 370
 371     if ( style & wxTE_MULTILINE )
 372     {
 373         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 374                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 375
 376         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 377         if ( !(style & wxTE_NO_VSCROLL) )
 378             msStyle |= WS_VSCROLL;
 379
 380         style |= wxTE_PROCESS_ENTER;
 381     }
 382     else // !multiline
 383     {
 384         // there is really no reason to not have this style for single line
 385         // text controls
 386         msStyle |= ES_AUTOHSCROLL;
 387     }
 388
 389     if ( style & wxHSCROLL )
 390         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 391
 392     if ( style & wxTE_READONLY )
 393         msStyle |= ES_READONLY;
 394
 395     if ( style & wxTE_PASSWORD )
 396         msStyle |= ES_PASSWORD;
 397
 398     if ( style & wxTE_AUTO_SCROLL )
 399         msStyle |= ES_AUTOHSCROLL;
 400
 401     if ( style & wxTE_NOHIDESEL )
 402         msStyle |= ES_NOHIDESEL;
 403
 404     return msStyle;
 405 }
 406
 407 void wxTextCtrl::SetWindowStyleFlag(long style)
 408 {
 409 #if wxUSE_RICHEDIT
 410     // we have to deal with some styles separately because they can't be
 411     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 412     // using richedit-specific EM_SETOPTIONS
 413     if ( IsRich() &&
 414             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 415     {
 416         bool set = (style & wxTE_NOHIDESEL) != 0;
 417
 418         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 419                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 420     }
 421 #endif // wxUSE_RICHEDIT
 422
 423     wxControl::SetWindowStyleFlag(style);
 424 }
 425
 426 // ----------------------------------------------------------------------------
 427 // set/get the controls text
 428 // ----------------------------------------------------------------------------
 429
 430 wxString wxTextCtrl::GetValue() const
 431 {
 432     // range 0..-1 is special for GetRange() and means to retrieve all text
 433     return GetRange(0, -1);
 434 }
 435
 436 wxString wxTextCtrl::GetRange(long from, long to) const
 437 {
 438     wxString str;
 439
 440     if ( from >= to && to != -1 )
 441     {
 442         // nothing to retrieve
 443         return str;
 444     }
 445
 446 #if wxUSE_RICHEDIT
 447     if ( IsRich() )
 448     {
 449         int len = GetWindowTextLength(GetHwnd());
 450         if ( len > from )
 451         {
 452             // alloc one extra WORD as needed by the control
 453             wxChar *p = str.GetWriteBuf(++len);
 454
 455             TEXTRANGE textRange;
 456             textRange.chrg.cpMin = from;
 457             textRange.chrg.cpMax = to == -1 ? len : to;
 458             textRange.lpstrText = p;
 459
 460             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 461
 462             if ( m_verRichEdit > 1 )
 463             {
 464                 // RichEdit 2.0 uses just CR ('\r') for the newlines which is
 465                 // neither Unix nor Windows style - convert it to something
 466                 // reasonable
 467                 for ( ; *p; p++ )
 468                 {
 469                     if ( *p == _T('\r') )
 470                         *p = _T('\n');
 471                 }
 472             }
 473
 474             str.UngetWriteBuf();
 475
 476             if ( m_verRichEdit == 1 )
 477             {
 478                 // convert to the canonical form - see comment below
 479                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 480             }
 481         }
 482         //else: no text at all, leave the string empty
 483     }
 484     else
 485 #endif // wxUSE_RICHEDIT
 486     {
 487         // retrieve all text
 488         str = wxGetWindowText(GetHWND());
 489
 490         // need only a range?
 491         if ( from < to )
 492         {
 493             str = str.Mid(from, to - from);
 494         }
 495
 496         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 497         // canonical one (same one as above) for consistency with the other kinds
 498         // of controls and, more importantly, with the other ports
 499         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 500     }
 501
 502     return str;
 503 }
 504
 505 void wxTextCtrl::SetValue(const wxString& value)
 506 {
 507     // if the text is long enough, it's faster to just set it instead of first
 508     // comparing it with the old one (chances are that it will be different
 509     // anyhow, this comparison is there to avoid flicker for small single-line
 510     // edit controls mostly)
 511     if ( (value.length() > 0x400) || (value != GetValue()) )
 512     {
 513         DoWriteText(value, FALSE /* not selection only */);
 514
 515         // mark the control as being not dirty - we changed its text, not the
 516         // user
 517         DiscardEdits();
 518
 519         // for compatibility, don't move the cursor when doing SetValue()
 520         SetInsertionPoint(0);
 521     }
 522 }
 523
 524 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 525
 526 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 527 {
 528     *pcb = 0;
 529
 530     wchar_t *wbuf = (wchar_t *)buf;
 531     const wchar_t *wpc = *(const wchar_t **)dwCookie;
 532     while ( cb && *wpc )
 533     {
 534         *wbuf++ = *wpc++;
 535
 536         cb -= sizeof(wchar_t);
 537         (*pcb) += sizeof(wchar_t);
 538     }
 539
 540     *(const wchar_t **)dwCookie = wpc;
 541
 542     return 0;
 543 }
 544
 545 extern long wxEncodingToCodepage(wxFontEncoding encoding); // from utils.cpp
 546
 547 #if wxUSE_UNICODE_MSLU
 548 bool wxTextCtrl::StreamIn(const wxString& value,
 549                           wxFontEncoding WXUNUSED(encoding),
 550                           bool selectionOnly)
 551 {
 552     const wchar_t *wpc = value.c_str();
 553 #else // !wxUSE_UNICODE_MSLU
 554 bool wxTextCtrl::StreamIn(const wxString& value,
 555                           wxFontEncoding encoding,
 556                           bool selectionOnly)
 557 {
 558     // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
 559     // text in the non default charset - otherwise it thinks it knows better
 560     // than we do and always shows it in the default one
 561
 562     // first get the Windows code page for this encoding
 563     long codepage = wxEncodingToCodepage(encoding);
 564     if ( codepage == -1 )
 565     {
 566         // unknown encoding
 567         return FALSE;
 568     }
 569
 570     // next translate to Unicode using this code page
 571     int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
 572
 573 #if wxUSE_WCHAR_T
 574     wxWCharBuffer wchBuf(len);
 575 #else
 576     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 577 #endif
 578
 579     if ( !::MultiByteToWideChar(codepage, 0, value, -1,
 580                                 (wchar_t *)(const wchar_t *)wchBuf, len) )
 581     {
 582         wxLogLastError(_T("MultiByteToWideChar"));
 583     }
 584
 585     // finally, stream it in the control
 586     const wchar_t *wpc = wchBuf;
 587 #endif // wxUSE_UNICODE_MSLU
 588
 589     EDITSTREAM eds;
 590     wxZeroMemory(eds);
 591     eds.dwCookie = (DWORD)&wpc;
 592     // the cast below is needed for broken (very) old mingw32 headers
 593     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 594
 595     if ( !::SendMessage(GetHwnd(), EM_STREAMIN,
 596                         SF_TEXT |
 597                         SF_UNICODE |
 598                         (selectionOnly ? SFF_SELECTION : 0),
 599                         (LPARAM)&eds) || eds.dwError )
 600     {
 601         wxLogLastError(_T("EM_STREAMIN"));
 602     }
 603
 604 #if !wxUSE_WCHAR_T
 605     free(wchBuf);
 606 #endif // !wxUSE_WCHAR_T
 607
 608     return TRUE;
 609 }
 610
 611 #endif // wxUSE_RICHEDIT
 612
 613 void wxTextCtrl::WriteText(const wxString& value)
 614 {
 615     DoWriteText(value);
 616 }
 617
 618 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 619 {
 620     wxString valueDos;
 621     if ( m_windowStyle & wxTE_MULTILINE )
 622         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 623     else
 624         valueDos = value;
 625
 626 #if wxUSE_RICHEDIT
 627     // there are several complications with the rich edit controls here
 628     bool done = FALSE;
 629     if ( IsRich() )
 630     {
 631         // first, ensure that the new text will be in the default style
 632         if ( !m_defaultStyle.IsDefault() )
 633         {
 634             long start, end;
 635             GetSelection(&start, &end);
 636             SetStyle(start, end, m_defaultStyle);
 637         }
 638
 639 #if wxUSE_UNICODE_MSLU
 640         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 641         // but EM_STREAMIN works
 642         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 643         {
 644            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 645         }
 646 #endif // wxUSE_UNICODE_MSLU
 647
 648 #if !wxUSE_UNICODE
 649         // next check if the text we're inserting must be shown in a non
 650         // default charset -- this only works for RichEdit > 1.0
 651         if ( GetRichVersion() > 1 )
 652         {
 653             wxFont font = m_defaultStyle.GetFont();
 654             if ( !font.Ok() )
 655                 font = GetFont();
 656
 657             if ( font.Ok() )
 658             {
 659                wxFontEncoding encoding = font.GetEncoding();
 660                if ( encoding != wxFONTENCODING_SYSTEM )
 661                {
 662                    done = StreamIn(valueDos, encoding, selectionOnly);
 663                }
 664             }
 665         }
 666 #endif // !wxUSE_UNICODE
 667     }
 668
 669     if ( !done )
 670 #endif // wxUSE_RICHEDIT
 671     {
 672         if ( !selectionOnly )
 673         {
 674             SetSelection(-1, -1);
 675         }
 676
 677         ::SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 678     }
 679
 680     AdjustSpaceLimit();
 681 }
 682
 683 void wxTextCtrl::AppendText(const wxString& text)
 684 {
 685     SetInsertionPointEnd();
 686
 687     WriteText(text);
 688 }
 689
 690 void wxTextCtrl::Clear()
 691 {
 692     ::SetWindowText(GetHwnd(), wxT(""));
 693 }
 694
 695 // ----------------------------------------------------------------------------
 696 // Clipboard operations
 697 // ----------------------------------------------------------------------------
 698
 699 void wxTextCtrl::Copy()
 700 {
 701     if (CanCopy())
 702     {
 703         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
 704     }
 705 }
 706
 707 void wxTextCtrl::Cut()
 708 {
 709     if (CanCut())
 710     {
 711         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
 712     }
 713 }
 714
 715 void wxTextCtrl::Paste()
 716 {
 717     if (CanPaste())
 718     {
 719         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
 720     }
 721 }
 722
 723 bool wxTextCtrl::CanCopy() const
 724 {
 725     // Can copy if there's a selection
 726     long from, to;
 727     GetSelection(&from, &to);
 728     return from != to;
 729 }
 730
 731 bool wxTextCtrl::CanCut() const
 732 {
 733     return CanCopy() && IsEditable();
 734 }
 735
 736 bool wxTextCtrl::CanPaste() const
 737 {
 738     if ( !IsEditable() )
 739         return FALSE;
 740
 741 #if wxUSE_RICHEDIT
 742     if ( IsRich() )
 743     {
 744         UINT cf = 0; // 0 == any format
 745
 746         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 747     }
 748 #endif // wxUSE_RICHEDIT
 749
 750     // Standard edit control: check for straight text on clipboard
 751     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 752         return FALSE;
 753
 754     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 755     ::CloseClipboard();
 756
 757     return isTextAvailable;
 758 }
 759
 760 // ----------------------------------------------------------------------------
 761 // Accessors
 762 // ----------------------------------------------------------------------------
 763
 764 void wxTextCtrl::SetEditable(bool editable)
 765 {
 766     HWND hWnd = GetHwnd();
 767     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 768 }
 769
 770 void wxTextCtrl::SetInsertionPoint(long pos)
 771 {
 772     DoSetSelection(pos, pos);
 773 }
 774
 775 void wxTextCtrl::SetInsertionPointEnd()
 776 {
 777     long pos;
 778
 779 #if wxUSE_RICHEDIT
 780     if ( m_verRichEdit == 1 )
 781     {
 782         // we don't have to waste time calling GetLastPosition() in this case
 783         pos = -1;
 784     }
 785     else // !RichEdit 1.0
 786 #endif // wxUSE_RICHEDIT
 787     {
 788         pos = GetLastPosition();
 789     }
 790
 791     SetInsertionPoint(pos);
 792 }
 793
 794 long wxTextCtrl::GetInsertionPoint() const
 795 {
 796 #if wxUSE_RICHEDIT
 797     if ( IsRich() )
 798     {
 799         CHARRANGE range;
 800         range.cpMin = 0;
 801         range.cpMax = 0;
 802         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 803         return range.cpMin;
 804     }
 805 #endif // wxUSE_RICHEDIT
 806
 807     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 808     return Pos & 0xFFFF;
 809 }
 810
 811 long wxTextCtrl::GetLastPosition() const
 812 {
 813     int numLines = GetNumberOfLines();
 814     long posStartLastLine = XYToPosition(0, numLines - 1);
 815
 816     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
 817
 818     return posStartLastLine + lenLastLine;
 819 }
 820
 821 // If the return values from and to are the same, there is no
 822 // selection.
 823 void wxTextCtrl::GetSelection(long* from, long* to) const
 824 {
 825 #if wxUSE_RICHEDIT
 826     if ( IsRich() )
 827     {
 828         CHARRANGE charRange;
 829         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 830
 831         *from = charRange.cpMin;
 832         *to = charRange.cpMax;
 833     }
 834     else
 835 #endif // !wxUSE_RICHEDIT
 836     {
 837         DWORD dwStart, dwEnd;
 838         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 839
 840         *from = dwStart;
 841         *to = dwEnd;
 842     }
 843 }
 844
 845 bool wxTextCtrl::IsEditable() const
 846 {
 847     // strangely enough, we may be called before the control is created: our
 848     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
 849     // us
 850     if ( !m_hWnd )
 851         return TRUE;
 852
 853     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 854
 855     return (style & ES_READONLY) == 0;
 856 }
 857
 858 // ----------------------------------------------------------------------------
 859 // selection
 860 // ----------------------------------------------------------------------------
 861
 862 void wxTextCtrl::SetSelection(long from, long to)
 863 {
 864     // if from and to are both -1, it means (in wxWindows) that all text should
 865     // be selected - translate into Windows convention
 866     if ( (from == -1) && (to == -1) )
 867     {
 868         from = 0;
 869         to = -1;
 870     }
 871
 872     DoSetSelection(from, to);
 873 }
 874
 875 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 876 {
 877     HWND hWnd = GetHwnd();
 878
 879 #ifdef __WIN32__
 880 #if wxUSE_RICHEDIT
 881     if ( IsRich() )
 882     {
 883         CHARRANGE range;
 884         range.cpMin = from;
 885         range.cpMax = to;
 886         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 887     }
 888     else
 889 #endif // wxUSE_RICHEDIT
 890     {
 891         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
 892     }
 893
 894     if ( scrollCaret )
 895     {
 896         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 897     }
 898 #else // Win16
 899     // WPARAM is 0: selection is scrolled into view
 900     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
 901 #endif // Win32/16
 902 }
 903
 904 // ----------------------------------------------------------------------------
 905 // Editing
 906 // ----------------------------------------------------------------------------
 907
 908 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 909 {
 910     // Set selection and remove it
 911     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
 912
 913     SendMessage(GetHwnd(), EM_REPLACESEL,
 914 #ifdef __WIN32__
 915                 TRUE,
 916 #else
 917                 FALSE,
 918 #endif
 919                 (LPARAM)value.c_str());
 920 }
 921
 922 void wxTextCtrl::Remove(long from, long to)
 923 {
 924     Replace(from, to, _T(""));
 925 }
 926
 927 bool wxTextCtrl::LoadFile(const wxString& file)
 928 {
 929     if ( wxTextCtrlBase::LoadFile(file) )
 930     {
 931         // update the size limit if needed
 932         AdjustSpaceLimit();
 933
 934         return TRUE;
 935     }
 936
 937     return FALSE;
 938 }
 939
 940 bool wxTextCtrl::IsModified() const
 941 {
 942     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
 943 }
 944
 945 // Makes 'unmodified'
 946 void wxTextCtrl::DiscardEdits()
 947 {
 948     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 949 }
 950
 951 int wxTextCtrl::GetNumberOfLines() const
 952 {
 953     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 954 }
 955
 956 long wxTextCtrl::XYToPosition(long x, long y) const
 957 {
 958     // This gets the char index for the _beginning_ of this line
 959     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 960
 961     return charIndex + x;
 962 }
 963
 964 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 965 {
 966     HWND hWnd = GetHwnd();
 967
 968     // This gets the line number containing the character
 969     long lineNo;
 970 #if wxUSE_RICHEDIT
 971     if ( IsRich() )
 972     {
 973         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 974     }
 975     else
 976 #endif // wxUSE_RICHEDIT
 977     {
 978         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 979     }
 980
 981     if ( lineNo == -1 )
 982     {
 983         // no such line
 984         return FALSE;
 985     }
 986
 987     // This gets the char index for the _beginning_ of this line
 988     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 989     if ( charIndex == -1 )
 990     {
 991         return FALSE;
 992     }
 993
 994     // The X position must therefore be the different between pos and charIndex
 995     if ( x )
 996         *x = pos - charIndex;
 997     if ( y )
 998         *y = lineNo;
 999
1000     return TRUE;
1001 }
1002
1003 void wxTextCtrl::ShowPosition(long pos)
1004 {
1005     HWND hWnd = GetHwnd();
1006
1007     // To scroll to a position, we pass the number of lines and characters
1008     // to scroll *by*. This means that we need to:
1009     // (1) Find the line position of the current line.
1010     // (2) Find the line position of pos.
1011     // (3) Scroll by (pos - current).
1012     // For now, ignore the horizontal scrolling.
1013
1014     // Is this where scrolling is relative to - the line containing the caret?
1015     // Or is the first visible line??? Try first visible line.
1016 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1017
1018     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1019
1020     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1021
1022     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1023
1024     if (linesToScroll != 0)
1025       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1026 }
1027
1028 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1029 {
1030     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1031 }
1032
1033 int wxTextCtrl::GetLineLength(long lineNo) const
1034 {
1035     long pos = XYToPosition(0, lineNo);
1036
1037     return GetLengthOfLineContainingPos(pos);
1038 }
1039
1040 wxString wxTextCtrl::GetLineText(long lineNo) const
1041 {
1042     size_t len = (size_t)GetLineLength(lineNo) + 1;
1043
1044     // there must be at least enough place for the length WORD in the
1045     // buffer
1046     len += sizeof(WORD);
1047
1048     wxString str;
1049     wxChar *buf = str.GetWriteBuf(len);
1050
1051     *(WORD *)buf = (WORD)len;
1052     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1053     buf[len] = 0;
1054
1055     str.UngetWriteBuf(len);
1056
1057     return str;
1058 }
1059
1060 void wxTextCtrl::SetMaxLength(unsigned long len)
1061 {
1062     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1063 }
1064
1065 // ----------------------------------------------------------------------------
1066 // Undo/redo
1067 // ----------------------------------------------------------------------------
1068
1069 void wxTextCtrl::Undo()
1070 {
1071     if (CanUndo())
1072     {
1073         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1074     }
1075 }
1076
1077 void wxTextCtrl::Redo()
1078 {
1079     if (CanRedo())
1080     {
1081         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1082         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1083     }
1084 }
1085
1086 bool wxTextCtrl::CanUndo() const
1087 {
1088     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1089 }
1090
1091 bool wxTextCtrl::CanRedo() const
1092 {
1093     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1094 }
1095
1096 // ----------------------------------------------------------------------------
1097 // implemenation details
1098 // ----------------------------------------------------------------------------
1099
1100 void wxTextCtrl::Command(wxCommandEvent & event)
1101 {
1102     SetValue(event.GetString());
1103     ProcessCommand (event);
1104 }
1105
1106 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1107 {
1108     // By default, load the first file into the text window.
1109     if (event.GetNumberOfFiles() > 0)
1110     {
1111         LoadFile(event.GetFiles()[0]);
1112     }
1113 }
1114
1115 // ----------------------------------------------------------------------------
1116 // kbd input processing
1117 // ----------------------------------------------------------------------------
1118
1119 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1120 {
1121     MSG *msg = (MSG *)pMsg;
1122
1123     // check for our special keys here: if we don't do it and the parent frame
1124     // uses them as accelerators, they wouldn't work at all, so we disable
1125     // usual preprocessing for them
1126     if ( msg->message == WM_KEYDOWN )
1127     {
1128         WORD vkey = (WORD) msg->wParam;
1129         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1130         {
1131             if ( vkey == VK_BACK )
1132                 return FALSE;
1133         }
1134         else // no Alt
1135         {
1136             if ( wxIsCtrlDown() )
1137             {
1138                 switch ( vkey )
1139                 {
1140                     case 'C':
1141                     case 'V':
1142                     case 'X':
1143                     case VK_INSERT:
1144                     case VK_DELETE:
1145                     case VK_HOME:
1146                     case VK_END:
1147                         return FALSE;
1148                 }
1149             }
1150             else if ( wxIsShiftDown() )
1151             {
1152                 if ( vkey == VK_INSERT || vkey == VK_DELETE )
1153                     return FALSE;
1154             }
1155         }
1156     }
1157
1158     return wxControl::MSWShouldPreProcessMessage(pMsg);
1159 }
1160
1161 void wxTextCtrl::OnChar(wxKeyEvent& event)
1162 {
1163     switch ( event.KeyCode() )
1164     {
1165         case WXK_RETURN:
1166             if ( !(m_windowStyle & wxTE_MULTILINE) )
1167             {
1168                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1169                 InitCommandEvent(event);
1170                 event.SetString(GetValue());
1171                 if ( GetEventHandler()->ProcessEvent(event) )
1172                     return;
1173             }
1174             //else: multiline controls need Enter for themselves
1175
1176             break;
1177
1178         case WXK_TAB:
1179             // always produce navigation event - even if we process TAB
1180             // ourselves the fact that we got here means that the user code
1181             // decided to skip processing of this TAB - probably to let it
1182             // do its default job.
1183             {
1184                 wxNavigationKeyEvent eventNav;
1185                 eventNav.SetDirection(!event.ShiftDown());
1186                 eventNav.SetWindowChange(event.ControlDown());
1187                 eventNav.SetEventObject(this);
1188
1189                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1190                     return;
1191             }
1192             break;
1193     }
1194
1195     // no, we didn't process it
1196     event.Skip();
1197 }
1198
1199 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1200 {
1201     // we always want the characters and the arrows
1202     if ( nMsg == WM_GETDLGCODE )
1203     {
1204         // we always want the chars and the arrows
1205         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1206
1207         // we may have several different cases:
1208         // 1. normal case: both TAB and ENTER are used for dialog navigation
1209         // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
1210         //    control in the dialog
1211         // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
1212         // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
1213         //    the next control
1214         if ( m_windowStyle & wxTE_PROCESS_ENTER )
1215             lDlgCode |= DLGC_WANTMESSAGE;
1216         if ( m_windowStyle & wxTE_PROCESS_TAB )
1217             lDlgCode |= DLGC_WANTTAB;
1218
1219         return lDlgCode;
1220     }
1221
1222     return wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1223 }
1224
1225 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1226 {
1227     switch (param)
1228     {
1229         case EN_SETFOCUS:
1230         case EN_KILLFOCUS:
1231             {
1232                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1233                                                          : wxEVT_SET_FOCUS,
1234                                    m_windowId);
1235                 event.SetEventObject( this );
1236                 GetEventHandler()->ProcessEvent(event);
1237             }
1238             break;
1239
1240         case EN_CHANGE:
1241             {
1242                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1243                 InitCommandEvent(event);
1244                 event.SetString(GetValue());
1245                 ProcessCommand(event);
1246             }
1247             break;
1248
1249         case EN_MAXTEXT:
1250             // the text size limit has been hit - increase it
1251             if ( !AdjustSpaceLimit() )
1252             {
1253                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1254                 InitCommandEvent(event);
1255                 event.SetString(GetValue());
1256                 ProcessCommand(event);
1257             }
1258             break;
1259
1260             // the other notification messages are not processed
1261         case EN_UPDATE:
1262         case EN_ERRSPACE:
1263         case EN_HSCROLL:
1264         case EN_VSCROLL:
1265             return FALSE;
1266         default:
1267             return FALSE;
1268     }
1269
1270     // processed
1271     return TRUE;
1272 }
1273
1274 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1275 #if wxUSE_CTL3D
1276                                WXUINT message,
1277                                WXWPARAM wParam,
1278                                WXLPARAM lParam
1279 #else
1280                                WXUINT WXUNUSED(message),
1281                                WXWPARAM WXUNUSED(wParam),
1282                                WXLPARAM WXUNUSED(lParam)
1283 #endif
1284     )
1285 {
1286 #if wxUSE_CTL3D
1287     if ( m_useCtl3D )
1288     {
1289         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1290         return (WXHBRUSH) hbrush;
1291     }
1292 #endif // wxUSE_CTL3D
1293
1294     HDC hdc = (HDC)pDC;
1295     if (GetParent()->GetTransparentBackground())
1296         SetBkMode(hdc, TRANSPARENT);
1297     else
1298         SetBkMode(hdc, OPAQUE);
1299
1300     wxColour colBack = GetBackgroundColour();
1301
1302     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1303         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1304
1305     ::SetBkColor(hdc, wxColourToRGB(colBack));
1306     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1307
1308     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1309
1310     return (WXHBRUSH)brush->GetResourceHandle();
1311 }
1312
1313 // In WIN16, need to override normal erasing because
1314 // Ctl3D doesn't use the wxWindows background colour.
1315 #ifdef __WIN16__
1316 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1317 {
1318     wxColour col(m_backgroundColour);
1319
1320 #if wxUSE_CTL3D
1321     if (m_useCtl3D)
1322         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1323 #endif
1324
1325     RECT rect;
1326     ::GetClientRect(GetHwnd(), &rect);
1327
1328     COLORREF ref = wxColourToRGB(col);
1329     HBRUSH hBrush = ::CreateSolidBrush(ref);
1330     if ( !hBrush )
1331         wxLogLastError(wxT("CreateSolidBrush"));
1332
1333     HDC hdc = (HDC)event.GetDC()->GetHDC();
1334
1335     int mode = ::SetMapMode(hdc, MM_TEXT);
1336
1337     ::FillRect(hdc, &rect, hBrush);
1338     ::DeleteObject(hBrush);
1339     ::SetMapMode(hdc, mode);
1340
1341 }
1342 #endif // Win16
1343
1344 bool wxTextCtrl::AdjustSpaceLimit()
1345 {
1346 #ifndef __WIN16__
1347     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1348
1349     // HACK: we try to automatically extend the limit for the amount of text
1350     //       to allow (interactively) entering more than 64Kb of text under
1351     //       Win9x but we shouldn't reset the text limit which was previously
1352     //       set explicitly with SetMaxLength()
1353     //
1354     //       we could solve this by storing the limit we set in wxTextCtrl but
1355     //       to save space we prefer to simply test here the actual limit
1356     //       value: we consider that SetMaxLength() can only be called for
1357     //       values < 32Kb
1358     if ( limit < 0x8000 )
1359     {
1360         // we've got more text than limit set by SetMaxLength()
1361         return FALSE;
1362     }
1363
1364     unsigned int len = ::GetWindowTextLength(GetHwnd());
1365     if ( len >= limit )
1366     {
1367         limit = len + 0x8000;    // 32Kb
1368
1369 #if wxUSE_RICHEDIT
1370         if ( IsRich() )
1371         {
1372             // as a nice side effect, this also allows passing limit > 64Kb
1373             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1374         }
1375         else
1376 #endif // wxUSE_RICHEDIT
1377         {
1378             if ( limit > 0xffff )
1379             {
1380                 // this will set it to a platform-dependent maximum (much more
1381                 // than 64Kb under NT)
1382                 limit = 0;
1383             }
1384
1385             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1386         }
1387     }
1388 #endif // !Win16
1389
1390     // we changed the limit
1391     return TRUE;
1392 }
1393
1394 bool wxTextCtrl::AcceptsFocus() const
1395 {
1396     // we don't want focus if we can't be edited
1397     return IsEditable() && wxControl::AcceptsFocus();
1398 }
1399
1400 wxSize wxTextCtrl::DoGetBestSize() const
1401 {
1402     int cx, cy;
1403     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1404
1405     int wText = DEFAULT_ITEM_WIDTH;
1406
1407     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1408     if ( m_windowStyle & wxTE_MULTILINE )
1409     {
1410         hText *= wxMax(GetNumberOfLines(), 5);
1411     }
1412     //else: for single line control everything is ok
1413
1414     return wxSize(wText, hText);
1415 }
1416
1417 // ----------------------------------------------------------------------------
1418 // standard handlers for standard edit menu events
1419 // ----------------------------------------------------------------------------
1420
1421 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1422 {
1423     Cut();
1424 }
1425
1426 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1427 {
1428     Copy();
1429 }
1430
1431 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1432 {
1433     Paste();
1434 }
1435
1436 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1437 {
1438     Undo();
1439 }
1440
1441 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1442 {
1443     Redo();
1444 }
1445
1446 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1447 {
1448     event.Enable( CanCut() );
1449 }
1450
1451 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1452 {
1453     event.Enable( CanCopy() );
1454 }
1455
1456 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1457 {
1458     event.Enable( CanPaste() );
1459 }
1460
1461 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1462 {
1463     event.Enable( CanUndo() );
1464 }
1465
1466 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1467 {
1468     event.Enable( CanRedo() );
1469 }
1470
1471 // the rest of the file only deals with the rich edit controls
1472 #if wxUSE_RICHEDIT
1473
1474 // ----------------------------------------------------------------------------
1475 // EN_LINK processing
1476 // ----------------------------------------------------------------------------
1477
1478 bool wxTextCtrl::MSWOnNotify(int WXUNUSED(idCtrl), WXLPARAM lParam, WXLPARAM *result)
1479 {
1480     NMHDR *hdr = (NMHDR* )lParam;
1481     if ( hdr->code == EN_LINK )
1482     {
1483         ENLINK *enlink = (ENLINK *)hdr;
1484
1485         switch ( enlink->msg )
1486         {
1487             case WM_SETCURSOR:
1488                 // ok, so it is hardcoded - do we really nee to customize it?
1489                 ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1490                 *result = TRUE;
1491                 break;
1492
1493             case WM_MOUSEMOVE:
1494             case WM_LBUTTONDOWN:
1495             case WM_LBUTTONUP:
1496             case WM_LBUTTONDBLCLK:
1497             case WM_RBUTTONDOWN:
1498             case WM_RBUTTONUP:
1499             case WM_RBUTTONDBLCLK:
1500                 // send a mouse event
1501                 {
1502                     static const wxEventType eventsMouse[] =
1503                     {
1504                         wxEVT_MOTION,
1505                         wxEVT_LEFT_DOWN,
1506                         wxEVT_LEFT_UP,
1507                         wxEVT_LEFT_DCLICK,
1508                         wxEVT_RIGHT_DOWN,
1509                         wxEVT_RIGHT_UP,
1510                         wxEVT_RIGHT_DCLICK,
1511                     };
1512
1513                     // the event ids are consecutive
1514                     wxMouseEvent
1515                         evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1516
1517                     InitMouseEvent(evtMouse,
1518                                    GET_X_LPARAM(enlink->lParam),
1519                                    GET_Y_LPARAM(enlink->lParam),
1520                                    enlink->wParam);
1521
1522                     wxTextUrlEvent event(m_windowId, evtMouse,
1523                                          enlink->chrg.cpMin,
1524                                          enlink->chrg.cpMax);
1525
1526                     InitCommandEvent(event);
1527
1528                     *result = ProcessCommand(event);
1529                 }
1530                 break;
1531         }
1532
1533         return TRUE;
1534     }
1535
1536     // not processed
1537     return FALSE;
1538 }
1539
1540 // ----------------------------------------------------------------------------
1541 // colour setting for the rich edit controls
1542 // ----------------------------------------------------------------------------
1543
1544 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1545 {
1546     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1547     {
1548         // colour didn't really change
1549         return FALSE;
1550     }
1551
1552     if ( IsRich() )
1553     {
1554         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1555         // EM_SETBKGNDCOLOR additionally
1556         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1557     }
1558
1559     return TRUE;
1560 }
1561
1562 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1563 {
1564     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1565     {
1566         // colour didn't really change
1567         return FALSE;
1568     }
1569
1570     if ( IsRich() )
1571     {
1572         // change the colour of everything
1573         CHARFORMAT cf;
1574         wxZeroMemory(cf);
1575         cf.cbSize = sizeof(cf);
1576         cf.dwMask = CFM_COLOR;
1577         cf.crTextColor = wxColourToRGB(colour);
1578         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1579     }
1580
1581     return TRUE;
1582 }
1583
1584 // ----------------------------------------------------------------------------
1585 // styling support for rich edit controls
1586 // ----------------------------------------------------------------------------
1587
1588 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1589 {
1590     if ( !IsRich() )
1591     {
1592         // can't do it with normal text control
1593         return FALSE;
1594     }
1595
1596     // the richedit 1.0 doesn't handle setting background colour, so don't
1597     // even try to do anything if it's the only thing we want to change
1598     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() )
1599     {
1600         // nothing to do: return TRUE if there was really nothing to do and
1601         // FALSE if we failed to set bg colour
1602         return !style.HasBackgroundColour();
1603     }
1604
1605     // order the range if needed
1606     if ( start > end )
1607     {
1608         long tmp = start;
1609         start = end;
1610         end = tmp;
1611     }
1612
1613     // we can only change the format of the selection, so select the range we
1614     // want and restore the old selection later
1615     long startOld, endOld;
1616     GetSelection(&startOld, &endOld);
1617
1618     // but do we really have to change the selection?
1619     bool changeSel = start != startOld || end != endOld;
1620
1621     if ( changeSel )
1622     {
1623         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
1624     }
1625
1626     // initialize CHARFORMAT struct
1627 #if wxUSE_RICHEDIT2
1628     CHARFORMAT2 cf;
1629 #else
1630     CHARFORMAT cf;
1631 #endif
1632
1633     wxZeroMemory(cf);
1634
1635     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
1636     // CHARFORMAT in that case
1637 #if wxUSE_RICHEDIT2
1638     if ( m_verRichEdit == 1 )
1639     {
1640         // this is the only thing the control is going to grok
1641         cf.cbSize = sizeof(CHARFORMAT);
1642     }
1643     else
1644 #endif
1645     {
1646         // CHARFORMAT or CHARFORMAT2
1647         cf.cbSize = sizeof(cf);
1648     }
1649
1650     if ( style.HasFont() )
1651     {
1652         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1653         //     but using it doesn't seem to hurt neither so leaving it for now
1654
1655         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1656                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1657
1658         // fill in data from LOGFONT but recalculate lfHeight because we need
1659         // the real height in twips and not the negative number which
1660         // wxFillLogFont() returns (this is correct in general and works with
1661         // the Windows font mapper, but not here)
1662         LOGFONT lf;
1663         wxFillLogFont(&lf, &style.GetFont());
1664         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1665         cf.bCharSet = lf.lfCharSet;
1666         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1667         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1668
1669         // also deal with underline/italic/bold attributes: note that we must
1670         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1671         // style to allow clearing it
1672         if ( lf.lfItalic )
1673         {
1674             cf.dwEffects |= CFE_ITALIC;
1675         }
1676
1677         if ( lf.lfWeight == FW_BOLD )
1678         {
1679             cf.dwEffects |= CFE_BOLD;
1680         }
1681
1682         if ( lf.lfUnderline )
1683         {
1684             cf.dwEffects |= CFE_UNDERLINE;
1685         }
1686
1687         // strikeout fonts are not supported by wxWindows
1688     }
1689
1690     if ( style.HasTextColour() )
1691     {
1692         cf.dwMask |= CFM_COLOR;
1693         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1694     }
1695
1696 #if wxUSE_RICHEDIT2
1697     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
1698     {
1699         cf.dwMask |= CFM_BACKCOLOR;
1700         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1701     }
1702 #endif // wxUSE_RICHEDIT2
1703
1704     // do format the selection
1705     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1706                             SCF_SELECTION, (LPARAM)&cf) != 0;
1707     if ( !ok )
1708     {
1709         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1710     }
1711
1712     if ( changeSel )
1713     {
1714         // restore the original selection
1715         DoSetSelection(startOld, endOld, FALSE);
1716     }
1717
1718     return ok;
1719 }
1720
1721 // ----------------------------------------------------------------------------
1722 // wxRichEditModule
1723 // ----------------------------------------------------------------------------
1724
1725 bool wxRichEditModule::OnInit()
1726 {
1727     // don't do anything - we will load it when needed
1728     return TRUE;
1729 }
1730
1731 void wxRichEditModule::OnExit()
1732 {
1733     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
1734     {
1735         if ( ms_hRichEdit[i] )
1736         {
1737             ::FreeLibrary(ms_hRichEdit[i]);
1738         }
1739     }
1740 }
1741
1742 /* static */
1743 bool wxRichEditModule::Load(int version)
1744 {
1745     // we don't support loading richedit 3.0 as I don't know how to distinguish
1746     // it from 2.0 anyhow
1747     wxCHECK_MSG( version == 1 || version == 2, FALSE,
1748                  _T("incorrect richedit control version requested") );
1749
1750     // make it the index in the array
1751     version--;
1752
1753     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
1754     {
1755         // we had already tried to load it and failed
1756         return FALSE;
1757     }
1758
1759     if ( ms_hRichEdit[version] )
1760     {
1761         // we've already got this one
1762         return TRUE;
1763     }
1764
1765     wxString dllname = version ? _T("riched20") : _T("riched32");
1766     dllname += _T(".dll");
1767
1768     ms_hRichEdit[version] = ::LoadLibrary(dllname);
1769
1770     if ( !ms_hRichEdit[version] )
1771     {
1772         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1773
1774         ms_hRichEdit[version] = (HINSTANCE)-1;
1775
1776         return FALSE;
1777     }
1778
1779     return TRUE;
1780 }
1781
1782 #endif // wxUSE_RICHEDIT
1783
1784 #endif // wxUSE_TEXTCTRL