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         // enable the events we're interested in: we want to get EN_CHANGE and
 304         // EN_UPDATE as for the normal controls
 305         LPARAM mask = ENM_CHANGE | ENM_UPDATE;
 306
 307         if ( GetRichVersion() == 1 )
 308         {
 309             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 310             // explained in its handler
 311            mask |= ENM_MOUSEEVENTS;
 312         }
 313         else if ( m_windowStyle & wxTE_AUTO_URL )
 314         {
 315             mask |= ENM_LINK;
 316
 317             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 318         }
 319
 320         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 321     }
 322 #endif // wxUSE_RICHEDIT
 323
 324     return TRUE;
 325 }
 326
 327 // Make sure the window style (etc.) reflects the HWND style (roughly)
 328 void wxTextCtrl::AdoptAttributesFromHWND()
 329 {
 330     wxWindow::AdoptAttributesFromHWND();
 331
 332     HWND hWnd = GetHwnd();
 333     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 334
 335     // retrieve the style to see whether this is an edit or richedit ctrl
 336 #if wxUSE_RICHEDIT
 337     wxString classname = wxGetWindowClass(GetHWND());
 338
 339     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 340     {
 341         m_verRichEdit = 0;
 342     }
 343     else // rich edit?
 344     {
 345         wxChar c;
 346         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 347         {
 348             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 349
 350             m_verRichEdit = 0;
 351         }
 352     }
 353 #endif // wxUSE_RICHEDIT
 354
 355     if (style & ES_MULTILINE)
 356         m_windowStyle |= wxTE_MULTILINE;
 357     if (style & ES_PASSWORD)
 358         m_windowStyle |= wxTE_PASSWORD;
 359     if (style & ES_READONLY)
 360         m_windowStyle |= wxTE_READONLY;
 361     if (style & ES_WANTRETURN)
 362         m_windowStyle |= wxTE_PROCESS_ENTER;
 363 }
 364
 365 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 366 {
 367     // default border for the text controls is the sunken one
 368     if ( (style & wxBORDER_MASK) == wxBORDER_DEFAULT )
 369     {
 370         style |= wxBORDER_SUNKEN;
 371     }
 372
 373     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 374
 375     // default styles
 376     msStyle |= ES_LEFT;
 377
 378     if ( style & wxTE_MULTILINE )
 379     {
 380         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 381                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 382
 383         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 384         if ( !(style & wxTE_NO_VSCROLL) )
 385             msStyle |= WS_VSCROLL;
 386
 387         style |= wxTE_PROCESS_ENTER;
 388     }
 389     else // !multiline
 390     {
 391         // there is really no reason to not have this style for single line
 392         // text controls
 393         msStyle |= ES_AUTOHSCROLL;
 394     }
 395
 396     if ( style & wxHSCROLL )
 397         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 398
 399     if ( style & wxTE_READONLY )
 400         msStyle |= ES_READONLY;
 401
 402     if ( style & wxTE_PASSWORD )
 403         msStyle |= ES_PASSWORD;
 404
 405     if ( style & wxTE_AUTO_SCROLL )
 406         msStyle |= ES_AUTOHSCROLL;
 407
 408     if ( style & wxTE_NOHIDESEL )
 409         msStyle |= ES_NOHIDESEL;
 410
 411     return msStyle;
 412 }
 413
 414 void wxTextCtrl::SetWindowStyleFlag(long style)
 415 {
 416 #if wxUSE_RICHEDIT
 417     // we have to deal with some styles separately because they can't be
 418     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 419     // using richedit-specific EM_SETOPTIONS
 420     if ( IsRich() &&
 421             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 422     {
 423         bool set = (style & wxTE_NOHIDESEL) != 0;
 424
 425         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 426                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 427     }
 428 #endif // wxUSE_RICHEDIT
 429
 430     wxControl::SetWindowStyleFlag(style);
 431 }
 432
 433 // ----------------------------------------------------------------------------
 434 // set/get the controls text
 435 // ----------------------------------------------------------------------------
 436
 437 wxString wxTextCtrl::GetValue() const
 438 {
 439     // range 0..-1 is special for GetRange() and means to retrieve all text
 440     return GetRange(0, -1);
 441 }
 442
 443 wxString wxTextCtrl::GetRange(long from, long to) const
 444 {
 445     wxString str;
 446
 447     if ( from >= to && to != -1 )
 448     {
 449         // nothing to retrieve
 450         return str;
 451     }
 452
 453 #if wxUSE_RICHEDIT
 454     if ( IsRich() )
 455     {
 456         int len = GetWindowTextLength(GetHwnd());
 457         if ( len > from )
 458         {
 459             // alloc one extra WORD as needed by the control
 460             wxChar *p = str.GetWriteBuf(++len);
 461
 462             TEXTRANGE textRange;
 463             textRange.chrg.cpMin = from;
 464             textRange.chrg.cpMax = to == -1 ? len : to;
 465             textRange.lpstrText = p;
 466
 467             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 468
 469             if ( m_verRichEdit > 1 )
 470             {
 471                 // RichEdit 2.0 uses just CR ('\r') for the newlines which is
 472                 // neither Unix nor Windows style - convert it to something
 473                 // reasonable
 474                 for ( ; *p; p++ )
 475                 {
 476                     if ( *p == _T('\r') )
 477                         *p = _T('\n');
 478                 }
 479             }
 480
 481             str.UngetWriteBuf();
 482
 483             if ( m_verRichEdit == 1 )
 484             {
 485                 // convert to the canonical form - see comment below
 486                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 487             }
 488         }
 489         //else: no text at all, leave the string empty
 490     }
 491     else
 492 #endif // wxUSE_RICHEDIT
 493     {
 494         // retrieve all text
 495         str = wxGetWindowText(GetHWND());
 496
 497         // need only a range?
 498         if ( from < to )
 499         {
 500             str = str.Mid(from, to - from);
 501         }
 502
 503         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 504         // canonical one (same one as above) for consistency with the other kinds
 505         // of controls and, more importantly, with the other ports
 506         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 507     }
 508
 509     return str;
 510 }
 511
 512 void wxTextCtrl::SetValue(const wxString& value)
 513 {
 514     // if the text is long enough, it's faster to just set it instead of first
 515     // comparing it with the old one (chances are that it will be different
 516     // anyhow, this comparison is there to avoid flicker for small single-line
 517     // edit controls mostly)
 518     if ( (value.length() > 0x400) || (value != GetValue()) )
 519     {
 520         DoWriteText(value, FALSE /* not selection only */);
 521
 522         // mark the control as being not dirty - we changed its text, not the
 523         // user
 524         DiscardEdits();
 525
 526         // for compatibility, don't move the cursor when doing SetValue()
 527         SetInsertionPoint(0);
 528     }
 529 }
 530
 531 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 532
 533 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 534 {
 535     *pcb = 0;
 536
 537     wchar_t *wbuf = (wchar_t *)buf;
 538     const wchar_t *wpc = *(const wchar_t **)dwCookie;
 539     while ( cb && *wpc )
 540     {
 541         *wbuf++ = *wpc++;
 542
 543         cb -= sizeof(wchar_t);
 544         (*pcb) += sizeof(wchar_t);
 545     }
 546
 547     *(const wchar_t **)dwCookie = wpc;
 548
 549     return 0;
 550 }
 551
 552 extern long wxEncodingToCodepage(wxFontEncoding encoding); // from utils.cpp
 553
 554 #if wxUSE_UNICODE_MSLU
 555 bool wxTextCtrl::StreamIn(const wxString& value,
 556                           wxFontEncoding WXUNUSED(encoding),
 557                           bool selectionOnly)
 558 {
 559     const wchar_t *wpc = value.c_str();
 560 #else // !wxUSE_UNICODE_MSLU
 561 bool wxTextCtrl::StreamIn(const wxString& value,
 562                           wxFontEncoding encoding,
 563                           bool selectionOnly)
 564 {
 565     // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
 566     // text in the non default charset - otherwise it thinks it knows better
 567     // than we do and always shows it in the default one
 568
 569     // first get the Windows code page for this encoding
 570     long codepage = wxEncodingToCodepage(encoding);
 571     if ( codepage == -1 )
 572     {
 573         // unknown encoding
 574         return FALSE;
 575     }
 576
 577     // next translate to Unicode using this code page
 578     int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
 579
 580 #if wxUSE_WCHAR_T
 581     wxWCharBuffer wchBuf(len);
 582 #else
 583     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 584 #endif
 585
 586     if ( !::MultiByteToWideChar(codepage, 0, value, -1,
 587                                 (wchar_t *)(const wchar_t *)wchBuf, len) )
 588     {
 589         wxLogLastError(_T("MultiByteToWideChar"));
 590     }
 591
 592     // finally, stream it in the control
 593     const wchar_t *wpc = wchBuf;
 594 #endif // wxUSE_UNICODE_MSLU
 595
 596     EDITSTREAM eds;
 597     wxZeroMemory(eds);
 598     eds.dwCookie = (DWORD)&wpc;
 599     // the cast below is needed for broken (very) old mingw32 headers
 600     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 601
 602     if ( !::SendMessage(GetHwnd(), EM_STREAMIN,
 603                         SF_TEXT |
 604                         SF_UNICODE |
 605                         (selectionOnly ? SFF_SELECTION : 0),
 606                         (LPARAM)&eds) || eds.dwError )
 607     {
 608         wxLogLastError(_T("EM_STREAMIN"));
 609     }
 610
 611 #if !wxUSE_WCHAR_T
 612     free(wchBuf);
 613 #endif // !wxUSE_WCHAR_T
 614
 615     return TRUE;
 616 }
 617
 618 #endif // wxUSE_RICHEDIT
 619
 620 void wxTextCtrl::WriteText(const wxString& value)
 621 {
 622     DoWriteText(value);
 623 }
 624
 625 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 626 {
 627     wxString valueDos;
 628     if ( m_windowStyle & wxTE_MULTILINE )
 629         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 630     else
 631         valueDos = value;
 632
 633 #if wxUSE_RICHEDIT
 634     // there are several complications with the rich edit controls here
 635     bool done = FALSE;
 636     if ( IsRich() )
 637     {
 638         // first, ensure that the new text will be in the default style
 639         if ( !m_defaultStyle.IsDefault() )
 640         {
 641             long start, end;
 642             GetSelection(&start, &end);
 643             SetStyle(start, end, m_defaultStyle);
 644         }
 645
 646 #if wxUSE_UNICODE_MSLU
 647         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 648         // but EM_STREAMIN works
 649         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 650         {
 651            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 652         }
 653 #endif // wxUSE_UNICODE_MSLU
 654
 655 #if !wxUSE_UNICODE
 656         // next check if the text we're inserting must be shown in a non
 657         // default charset -- this only works for RichEdit > 1.0
 658         if ( GetRichVersion() > 1 )
 659         {
 660             wxFont font = m_defaultStyle.GetFont();
 661             if ( !font.Ok() )
 662                 font = GetFont();
 663
 664             if ( font.Ok() )
 665             {
 666                wxFontEncoding encoding = font.GetEncoding();
 667                if ( encoding != wxFONTENCODING_SYSTEM )
 668                {
 669                    done = StreamIn(valueDos, encoding, selectionOnly);
 670                }
 671             }
 672         }
 673 #endif // !wxUSE_UNICODE
 674     }
 675
 676     if ( !done )
 677 #endif // wxUSE_RICHEDIT
 678     {
 679         if ( !selectionOnly )
 680         {
 681             SetSelection(-1, -1);
 682         }
 683
 684         ::SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 685     }
 686
 687     AdjustSpaceLimit();
 688 }
 689
 690 void wxTextCtrl::AppendText(const wxString& text)
 691 {
 692     SetInsertionPointEnd();
 693
 694     WriteText(text);
 695 }
 696
 697 void wxTextCtrl::Clear()
 698 {
 699     ::SetWindowText(GetHwnd(), wxT(""));
 700 }
 701
 702 #ifdef __WIN32__
 703
 704 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 705 {
 706     SetFocus();
 707
 708     size_t lenOld = GetValue().length();
 709
 710     wxUint32 code = event.GetRawKeyCode();
 711     ::keybd_event(code, 0, 0 /* key press */, 0);
 712     ::keybd_event(code, 0, KEYEVENTF_KEYUP, 0);
 713
 714     // assume that any alphanumeric key changes the total number of characters
 715     // in the control - this should work in 99% of cases
 716     return GetValue().length() != lenOld;
 717 }
 718
 719 #endif // __WIN32__
 720
 721 // ----------------------------------------------------------------------------
 722 // Clipboard operations
 723 // ----------------------------------------------------------------------------
 724
 725 void wxTextCtrl::Copy()
 726 {
 727     if (CanCopy())
 728     {
 729         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
 730     }
 731 }
 732
 733 void wxTextCtrl::Cut()
 734 {
 735     if (CanCut())
 736     {
 737         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
 738     }
 739 }
 740
 741 void wxTextCtrl::Paste()
 742 {
 743     if (CanPaste())
 744     {
 745         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
 746     }
 747 }
 748
 749 bool wxTextCtrl::CanCopy() const
 750 {
 751     // Can copy if there's a selection
 752     long from, to;
 753     GetSelection(&from, &to);
 754     return from != to;
 755 }
 756
 757 bool wxTextCtrl::CanCut() const
 758 {
 759     return CanCopy() && IsEditable();
 760 }
 761
 762 bool wxTextCtrl::CanPaste() const
 763 {
 764     if ( !IsEditable() )
 765         return FALSE;
 766
 767 #if wxUSE_RICHEDIT
 768     if ( IsRich() )
 769     {
 770         UINT cf = 0; // 0 == any format
 771
 772         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 773     }
 774 #endif // wxUSE_RICHEDIT
 775
 776     // Standard edit control: check for straight text on clipboard
 777     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 778         return FALSE;
 779
 780     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 781     ::CloseClipboard();
 782
 783     return isTextAvailable;
 784 }
 785
 786 // ----------------------------------------------------------------------------
 787 // Accessors
 788 // ----------------------------------------------------------------------------
 789
 790 void wxTextCtrl::SetEditable(bool editable)
 791 {
 792     HWND hWnd = GetHwnd();
 793     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 794 }
 795
 796 void wxTextCtrl::SetInsertionPoint(long pos)
 797 {
 798     DoSetSelection(pos, pos);
 799 }
 800
 801 void wxTextCtrl::SetInsertionPointEnd()
 802 {
 803     long pos;
 804
 805 #if wxUSE_RICHEDIT
 806     if ( m_verRichEdit == 1 )
 807     {
 808         // we don't have to waste time calling GetLastPosition() in this case
 809         pos = -1;
 810     }
 811     else // !RichEdit 1.0
 812 #endif // wxUSE_RICHEDIT
 813     {
 814         pos = GetLastPosition();
 815     }
 816
 817     SetInsertionPoint(pos);
 818 }
 819
 820 long wxTextCtrl::GetInsertionPoint() const
 821 {
 822 #if wxUSE_RICHEDIT
 823     if ( IsRich() )
 824     {
 825         CHARRANGE range;
 826         range.cpMin = 0;
 827         range.cpMax = 0;
 828         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 829         return range.cpMin;
 830     }
 831 #endif // wxUSE_RICHEDIT
 832
 833     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 834     return Pos & 0xFFFF;
 835 }
 836
 837 long wxTextCtrl::GetLastPosition() const
 838 {
 839     int numLines = GetNumberOfLines();
 840     long posStartLastLine = XYToPosition(0, numLines - 1);
 841
 842     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
 843
 844     return posStartLastLine + lenLastLine;
 845 }
 846
 847 // If the return values from and to are the same, there is no
 848 // selection.
 849 void wxTextCtrl::GetSelection(long* from, long* to) const
 850 {
 851 #if wxUSE_RICHEDIT
 852     if ( IsRich() )
 853     {
 854         CHARRANGE charRange;
 855         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 856
 857         *from = charRange.cpMin;
 858         *to = charRange.cpMax;
 859     }
 860     else
 861 #endif // !wxUSE_RICHEDIT
 862     {
 863         DWORD dwStart, dwEnd;
 864         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 865
 866         *from = dwStart;
 867         *to = dwEnd;
 868     }
 869 }
 870
 871 bool wxTextCtrl::IsEditable() const
 872 {
 873     // strangely enough, we may be called before the control is created: our
 874     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
 875     // us
 876     if ( !m_hWnd )
 877         return TRUE;
 878
 879     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 880
 881     return (style & ES_READONLY) == 0;
 882 }
 883
 884 // ----------------------------------------------------------------------------
 885 // selection
 886 // ----------------------------------------------------------------------------
 887
 888 void wxTextCtrl::SetSelection(long from, long to)
 889 {
 890     // if from and to are both -1, it means (in wxWindows) that all text should
 891     // be selected - translate into Windows convention
 892     if ( (from == -1) && (to == -1) )
 893     {
 894         from = 0;
 895         to = -1;
 896     }
 897
 898     DoSetSelection(from, to);
 899 }
 900
 901 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 902 {
 903     HWND hWnd = GetHwnd();
 904
 905 #ifdef __WIN32__
 906 #if wxUSE_RICHEDIT
 907     if ( IsRich() )
 908     {
 909         CHARRANGE range;
 910         range.cpMin = from;
 911         range.cpMax = to;
 912         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 913     }
 914     else
 915 #endif // wxUSE_RICHEDIT
 916     {
 917         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
 918     }
 919
 920     if ( scrollCaret )
 921     {
 922         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 923     }
 924 #else // Win16
 925     // WPARAM is 0: selection is scrolled into view
 926     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
 927 #endif // Win32/16
 928 }
 929
 930 // ----------------------------------------------------------------------------
 931 // Editing
 932 // ----------------------------------------------------------------------------
 933
 934 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 935 {
 936     // Set selection and remove it
 937     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
 938
 939     SendMessage(GetHwnd(), EM_REPLACESEL,
 940 #ifdef __WIN32__
 941                 TRUE,
 942 #else
 943                 FALSE,
 944 #endif
 945                 (LPARAM)value.c_str());
 946 }
 947
 948 void wxTextCtrl::Remove(long from, long to)
 949 {
 950     Replace(from, to, _T(""));
 951 }
 952
 953 bool wxTextCtrl::LoadFile(const wxString& file)
 954 {
 955     if ( wxTextCtrlBase::LoadFile(file) )
 956     {
 957         // update the size limit if needed
 958         AdjustSpaceLimit();
 959
 960         return TRUE;
 961     }
 962
 963     return FALSE;
 964 }
 965
 966 bool wxTextCtrl::IsModified() const
 967 {
 968     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
 969 }
 970
 971 // Makes 'unmodified'
 972 void wxTextCtrl::DiscardEdits()
 973 {
 974     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 975 }
 976
 977 int wxTextCtrl::GetNumberOfLines() const
 978 {
 979     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 980 }
 981
 982 long wxTextCtrl::XYToPosition(long x, long y) const
 983 {
 984     // This gets the char index for the _beginning_ of this line
 985     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 986
 987     return charIndex + x;
 988 }
 989
 990 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 991 {
 992     HWND hWnd = GetHwnd();
 993
 994     // This gets the line number containing the character
 995     long lineNo;
 996 #if wxUSE_RICHEDIT
 997     if ( IsRich() )
 998     {
 999         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1000     }
1001     else
1002 #endif // wxUSE_RICHEDIT
1003     {
1004         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1005     }
1006
1007     if ( lineNo == -1 )
1008     {
1009         // no such line
1010         return FALSE;
1011     }
1012
1013     // This gets the char index for the _beginning_ of this line
1014     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1015     if ( charIndex == -1 )
1016     {
1017         return FALSE;
1018     }
1019
1020     // The X position must therefore be the different between pos and charIndex
1021     if ( x )
1022         *x = pos - charIndex;
1023     if ( y )
1024         *y = lineNo;
1025
1026     return TRUE;
1027 }
1028
1029 void wxTextCtrl::ShowPosition(long pos)
1030 {
1031     HWND hWnd = GetHwnd();
1032
1033     // To scroll to a position, we pass the number of lines and characters
1034     // to scroll *by*. This means that we need to:
1035     // (1) Find the line position of the current line.
1036     // (2) Find the line position of pos.
1037     // (3) Scroll by (pos - current).
1038     // For now, ignore the horizontal scrolling.
1039
1040     // Is this where scrolling is relative to - the line containing the caret?
1041     // Or is the first visible line??? Try first visible line.
1042 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1043
1044     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1045
1046     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1047
1048     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1049
1050     if (linesToScroll != 0)
1051       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1052 }
1053
1054 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1055 {
1056     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1057 }
1058
1059 int wxTextCtrl::GetLineLength(long lineNo) const
1060 {
1061     long pos = XYToPosition(0, lineNo);
1062
1063     return GetLengthOfLineContainingPos(pos);
1064 }
1065
1066 wxString wxTextCtrl::GetLineText(long lineNo) const
1067 {
1068     size_t len = (size_t)GetLineLength(lineNo) + 1;
1069
1070     // there must be at least enough place for the length WORD in the
1071     // buffer
1072     len += sizeof(WORD);
1073
1074     wxString str;
1075     wxChar *buf = str.GetWriteBuf(len);
1076
1077     *(WORD *)buf = (WORD)len;
1078     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1079     buf[len] = 0;
1080
1081     str.UngetWriteBuf(len);
1082
1083     return str;
1084 }
1085
1086 void wxTextCtrl::SetMaxLength(unsigned long len)
1087 {
1088     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1089 }
1090
1091 // ----------------------------------------------------------------------------
1092 // Undo/redo
1093 // ----------------------------------------------------------------------------
1094
1095 void wxTextCtrl::Undo()
1096 {
1097     if (CanUndo())
1098     {
1099         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1100     }
1101 }
1102
1103 void wxTextCtrl::Redo()
1104 {
1105     if (CanRedo())
1106     {
1107         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1108         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1109     }
1110 }
1111
1112 bool wxTextCtrl::CanUndo() const
1113 {
1114     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1115 }
1116
1117 bool wxTextCtrl::CanRedo() const
1118 {
1119     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1120 }
1121
1122 // ----------------------------------------------------------------------------
1123 // implemenation details
1124 // ----------------------------------------------------------------------------
1125
1126 void wxTextCtrl::Command(wxCommandEvent & event)
1127 {
1128     SetValue(event.GetString());
1129     ProcessCommand (event);
1130 }
1131
1132 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1133 {
1134     // By default, load the first file into the text window.
1135     if (event.GetNumberOfFiles() > 0)
1136     {
1137         LoadFile(event.GetFiles()[0]);
1138     }
1139 }
1140
1141 // ----------------------------------------------------------------------------
1142 // kbd input processing
1143 // ----------------------------------------------------------------------------
1144
1145 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1146 {
1147     MSG *msg = (MSG *)pMsg;
1148
1149     // check for our special keys here: if we don't do it and the parent frame
1150     // uses them as accelerators, they wouldn't work at all, so we disable
1151     // usual preprocessing for them
1152     if ( msg->message == WM_KEYDOWN )
1153     {
1154         WORD vkey = (WORD) msg->wParam;
1155         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1156         {
1157             if ( vkey == VK_BACK )
1158                 return FALSE;
1159         }
1160         else // no Alt
1161         {
1162             if ( wxIsCtrlDown() )
1163             {
1164                 switch ( vkey )
1165                 {
1166                     case 'C':
1167                     case 'V':
1168                     case 'X':
1169                     case VK_INSERT:
1170                     case VK_DELETE:
1171                     case VK_HOME:
1172                     case VK_END:
1173                         return FALSE;
1174                 }
1175             }
1176             else if ( wxIsShiftDown() )
1177             {
1178                 if ( vkey == VK_INSERT || vkey == VK_DELETE )
1179                     return FALSE;
1180             }
1181         }
1182     }
1183
1184     return wxControl::MSWShouldPreProcessMessage(pMsg);
1185 }
1186
1187 void wxTextCtrl::OnChar(wxKeyEvent& event)
1188 {
1189     switch ( event.KeyCode() )
1190     {
1191         case WXK_RETURN:
1192             if ( !(m_windowStyle & wxTE_MULTILINE) )
1193             {
1194                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1195                 InitCommandEvent(event);
1196                 event.SetString(GetValue());
1197                 if ( GetEventHandler()->ProcessEvent(event) )
1198                     return;
1199             }
1200             //else: multiline controls need Enter for themselves
1201
1202             break;
1203
1204         case WXK_TAB:
1205             // always produce navigation event - even if we process TAB
1206             // ourselves the fact that we got here means that the user code
1207             // decided to skip processing of this TAB - probably to let it
1208             // do its default job.
1209             {
1210                 wxNavigationKeyEvent eventNav;
1211                 eventNav.SetDirection(!event.ShiftDown());
1212                 eventNav.SetWindowChange(event.ControlDown());
1213                 eventNav.SetEventObject(this);
1214
1215                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1216                     return;
1217             }
1218             break;
1219     }
1220
1221     // no, we didn't process it
1222     event.Skip();
1223 }
1224
1225 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1226 {
1227     long lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1228
1229     if ( nMsg == WM_GETDLGCODE )
1230     {
1231         // we always want the chars and the arrows
1232         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1233
1234         // we may have several different cases:
1235         // 1. normal case: both TAB and ENTER are used for dialog navigation
1236         // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1237         //    next control in the dialog
1238         // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1239         //    navigation
1240         // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass
1241         //    to the next control
1242
1243         // the multiline edit control should always get <Return> for itself
1244         if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1245             lDlgCode |= DLGC_WANTMESSAGE;
1246
1247         if ( HasFlag(wxTE_PROCESS_TAB) )
1248             lDlgCode |= DLGC_WANTTAB;
1249
1250         lRc |= lDlgCode;
1251     }
1252
1253     return lRc;
1254 }
1255
1256 // ----------------------------------------------------------------------------
1257 // text control event processing
1258 // ----------------------------------------------------------------------------
1259
1260 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1261 {
1262     switch (param)
1263     {
1264         case EN_SETFOCUS:
1265         case EN_KILLFOCUS:
1266             {
1267                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1268                                                          : wxEVT_SET_FOCUS,
1269                                    m_windowId);
1270                 event.SetEventObject( this );
1271                 GetEventHandler()->ProcessEvent(event);
1272             }
1273             break;
1274
1275         case EN_CHANGE:
1276             {
1277                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1278                 InitCommandEvent(event);
1279                 event.SetString(GetValue());
1280                 ProcessCommand(event);
1281             }
1282             break;
1283
1284         case EN_MAXTEXT:
1285             // the text size limit has been hit - increase it
1286             if ( !AdjustSpaceLimit() )
1287             {
1288                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1289                 InitCommandEvent(event);
1290                 event.SetString(GetValue());
1291                 ProcessCommand(event);
1292             }
1293             break;
1294
1295             // the other notification messages are not processed
1296         case EN_UPDATE:
1297         case EN_ERRSPACE:
1298         case EN_HSCROLL:
1299         case EN_VSCROLL:
1300             return FALSE;
1301
1302         default:
1303             return FALSE;
1304     }
1305
1306     // processed
1307     return TRUE;
1308 }
1309
1310 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1311 #if wxUSE_CTL3D
1312                                WXUINT message,
1313                                WXWPARAM wParam,
1314                                WXLPARAM lParam
1315 #else
1316                                WXUINT WXUNUSED(message),
1317                                WXWPARAM WXUNUSED(wParam),
1318                                WXLPARAM WXUNUSED(lParam)
1319 #endif
1320     )
1321 {
1322 #if wxUSE_CTL3D
1323     if ( m_useCtl3D )
1324     {
1325         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1326         return (WXHBRUSH) hbrush;
1327     }
1328 #endif // wxUSE_CTL3D
1329
1330     HDC hdc = (HDC)pDC;
1331     if (GetParent()->GetTransparentBackground())
1332         SetBkMode(hdc, TRANSPARENT);
1333     else
1334         SetBkMode(hdc, OPAQUE);
1335
1336     wxColour colBack = GetBackgroundColour();
1337
1338     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1339         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1340
1341     ::SetBkColor(hdc, wxColourToRGB(colBack));
1342     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1343
1344     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1345
1346     return (WXHBRUSH)brush->GetResourceHandle();
1347 }
1348
1349 // In WIN16, need to override normal erasing because
1350 // Ctl3D doesn't use the wxWindows background colour.
1351 #ifdef __WIN16__
1352 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1353 {
1354     wxColour col(m_backgroundColour);
1355
1356 #if wxUSE_CTL3D
1357     if (m_useCtl3D)
1358         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1359 #endif
1360
1361     RECT rect;
1362     ::GetClientRect(GetHwnd(), &rect);
1363
1364     COLORREF ref = wxColourToRGB(col);
1365     HBRUSH hBrush = ::CreateSolidBrush(ref);
1366     if ( !hBrush )
1367         wxLogLastError(wxT("CreateSolidBrush"));
1368
1369     HDC hdc = (HDC)event.GetDC()->GetHDC();
1370
1371     int mode = ::SetMapMode(hdc, MM_TEXT);
1372
1373     ::FillRect(hdc, &rect, hBrush);
1374     ::DeleteObject(hBrush);
1375     ::SetMapMode(hdc, mode);
1376
1377 }
1378 #endif // Win16
1379
1380 bool wxTextCtrl::AdjustSpaceLimit()
1381 {
1382 #ifndef __WIN16__
1383     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1384
1385     // HACK: we try to automatically extend the limit for the amount of text
1386     //       to allow (interactively) entering more than 64Kb of text under
1387     //       Win9x but we shouldn't reset the text limit which was previously
1388     //       set explicitly with SetMaxLength()
1389     //
1390     //       we could solve this by storing the limit we set in wxTextCtrl but
1391     //       to save space we prefer to simply test here the actual limit
1392     //       value: we consider that SetMaxLength() can only be called for
1393     //       values < 32Kb
1394     if ( limit < 0x8000 )
1395     {
1396         // we've got more text than limit set by SetMaxLength()
1397         return FALSE;
1398     }
1399
1400     unsigned int len = ::GetWindowTextLength(GetHwnd());
1401     if ( len >= limit )
1402     {
1403         limit = len + 0x8000;    // 32Kb
1404
1405 #if wxUSE_RICHEDIT
1406         if ( IsRich() )
1407         {
1408             // as a nice side effect, this also allows passing limit > 64Kb
1409             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1410         }
1411         else
1412 #endif // wxUSE_RICHEDIT
1413         {
1414             if ( limit > 0xffff )
1415             {
1416                 // this will set it to a platform-dependent maximum (much more
1417                 // than 64Kb under NT)
1418                 limit = 0;
1419             }
1420
1421             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1422         }
1423     }
1424 #endif // !Win16
1425
1426     // we changed the limit
1427     return TRUE;
1428 }
1429
1430 bool wxTextCtrl::AcceptsFocus() const
1431 {
1432     // we don't want focus if we can't be edited
1433     return IsEditable() && wxControl::AcceptsFocus();
1434 }
1435
1436 wxSize wxTextCtrl::DoGetBestSize() const
1437 {
1438     int cx, cy;
1439     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1440
1441     int wText = DEFAULT_ITEM_WIDTH;
1442
1443     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1444     if ( m_windowStyle & wxTE_MULTILINE )
1445     {
1446         hText *= wxMax(GetNumberOfLines(), 5);
1447     }
1448     //else: for single line control everything is ok
1449
1450     return wxSize(wText, hText);
1451 }
1452
1453 // ----------------------------------------------------------------------------
1454 // standard handlers for standard edit menu events
1455 // ----------------------------------------------------------------------------
1456
1457 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1458 {
1459     Cut();
1460 }
1461
1462 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1463 {
1464     Copy();
1465 }
1466
1467 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1468 {
1469     Paste();
1470 }
1471
1472 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1473 {
1474     Undo();
1475 }
1476
1477 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1478 {
1479     Redo();
1480 }
1481
1482 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1483 {
1484     event.Enable( CanCut() );
1485 }
1486
1487 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1488 {
1489     event.Enable( CanCopy() );
1490 }
1491
1492 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1493 {
1494     event.Enable( CanPaste() );
1495 }
1496
1497 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1498 {
1499     event.Enable( CanUndo() );
1500 }
1501
1502 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1503 {
1504     event.Enable( CanRedo() );
1505 }
1506
1507 // the rest of the file only deals with the rich edit controls
1508 #if wxUSE_RICHEDIT
1509
1510 // ----------------------------------------------------------------------------
1511 // EN_LINK processing
1512 // ----------------------------------------------------------------------------
1513
1514 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1515 {
1516     NMHDR *hdr = (NMHDR* )lParam;
1517     switch ( hdr->code )
1518     {
1519         case EN_MSGFILTER:
1520             {
1521                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
1522                 UINT msg = msgf->msg;
1523
1524                 // this is a bit crazy but richedit 1.0 sends us all mouse
1525                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
1526                 // generate the wxWin events for this message manually
1527                 //
1528                 // NB: in fact, this is still not totally correct as it does
1529                 //     send us WM_LBUTTONUP if the selection was cleared by the
1530                 //     last click -- so currently we get 2 events in this case,
1531                 //     but as I don't see any obvious way to check for this I
1532                 //     leave this code in place because it's still better than
1533                 //     not getting left up events at all
1534                 if ( msg == WM_LBUTTONUP )
1535                 {
1536                     WXUINT flags = msgf->wParam;
1537                     int x = GET_X_LPARAM(msgf->lParam),
1538                         y = GET_Y_LPARAM(msgf->lParam);
1539
1540                     HandleMouseEvent(msg, x, y, flags);
1541                 }
1542             }
1543
1544             // return TRUE to process the event (and FALSE to ignore it)
1545             return TRUE;
1546
1547         case EN_LINK:
1548             {
1549                 const ENLINK *enlink = (ENLINK *)hdr;
1550
1551                 switch ( enlink->msg )
1552                 {
1553                     case WM_SETCURSOR:
1554                         // ok, so it is hardcoded - do we really nee to
1555                         // customize it?
1556                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1557                         *result = TRUE;
1558                         break;
1559
1560                     case WM_MOUSEMOVE:
1561                     case WM_LBUTTONDOWN:
1562                     case WM_LBUTTONUP:
1563                     case WM_LBUTTONDBLCLK:
1564                     case WM_RBUTTONDOWN:
1565                     case WM_RBUTTONUP:
1566                     case WM_RBUTTONDBLCLK:
1567                         // send a mouse event
1568                         {
1569                             static const wxEventType eventsMouse[] =
1570                             {
1571                                 wxEVT_MOTION,
1572                                 wxEVT_LEFT_DOWN,
1573                                 wxEVT_LEFT_UP,
1574                                 wxEVT_LEFT_DCLICK,
1575                                 wxEVT_RIGHT_DOWN,
1576                                 wxEVT_RIGHT_UP,
1577                                 wxEVT_RIGHT_DCLICK,
1578                             };
1579
1580                             // the event ids are consecutive
1581                             wxMouseEvent
1582                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1583
1584                             InitMouseEvent(evtMouse,
1585                                            GET_X_LPARAM(enlink->lParam),
1586                                            GET_Y_LPARAM(enlink->lParam),
1587                                            enlink->wParam);
1588
1589                             wxTextUrlEvent event(m_windowId, evtMouse,
1590                                                  enlink->chrg.cpMin,
1591                                                  enlink->chrg.cpMax);
1592
1593                             InitCommandEvent(event);
1594
1595                             *result = ProcessCommand(event);
1596                         }
1597                         break;
1598                 }
1599             }
1600             return TRUE;
1601     }
1602
1603     // not processed, leave it to the base class
1604     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
1605 }
1606
1607 // ----------------------------------------------------------------------------
1608 // colour setting for the rich edit controls
1609 // ----------------------------------------------------------------------------
1610
1611 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1612 {
1613     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1614     {
1615         // colour didn't really change
1616         return FALSE;
1617     }
1618
1619     if ( IsRich() )
1620     {
1621         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1622         // EM_SETBKGNDCOLOR additionally
1623         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1624     }
1625
1626     return TRUE;
1627 }
1628
1629 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1630 {
1631     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1632     {
1633         // colour didn't really change
1634         return FALSE;
1635     }
1636
1637     if ( IsRich() )
1638     {
1639         // change the colour of everything
1640         CHARFORMAT cf;
1641         wxZeroMemory(cf);
1642         cf.cbSize = sizeof(cf);
1643         cf.dwMask = CFM_COLOR;
1644         cf.crTextColor = wxColourToRGB(colour);
1645         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1646     }
1647
1648     return TRUE;
1649 }
1650
1651 // ----------------------------------------------------------------------------
1652 // styling support for rich edit controls
1653 // ----------------------------------------------------------------------------
1654
1655 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1656 {
1657     if ( !IsRich() )
1658     {
1659         // can't do it with normal text control
1660         return FALSE;
1661     }
1662
1663     // the richedit 1.0 doesn't handle setting background colour, so don't
1664     // even try to do anything if it's the only thing we want to change
1665     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() )
1666     {
1667         // nothing to do: return TRUE if there was really nothing to do and
1668         // FALSE if we failed to set bg colour
1669         return !style.HasBackgroundColour();
1670     }
1671
1672     // order the range if needed
1673     if ( start > end )
1674     {
1675         long tmp = start;
1676         start = end;
1677         end = tmp;
1678     }
1679
1680     // we can only change the format of the selection, so select the range we
1681     // want and restore the old selection later
1682     long startOld, endOld;
1683     GetSelection(&startOld, &endOld);
1684
1685     // but do we really have to change the selection?
1686     bool changeSel = start != startOld || end != endOld;
1687
1688     if ( changeSel )
1689     {
1690         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
1691     }
1692
1693     // initialize CHARFORMAT struct
1694 #if wxUSE_RICHEDIT2
1695     CHARFORMAT2 cf;
1696 #else
1697     CHARFORMAT cf;
1698 #endif
1699
1700     wxZeroMemory(cf);
1701
1702     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
1703     // CHARFORMAT in that case
1704 #if wxUSE_RICHEDIT2
1705     if ( m_verRichEdit == 1 )
1706     {
1707         // this is the only thing the control is going to grok
1708         cf.cbSize = sizeof(CHARFORMAT);
1709     }
1710     else
1711 #endif
1712     {
1713         // CHARFORMAT or CHARFORMAT2
1714         cf.cbSize = sizeof(cf);
1715     }
1716
1717     if ( style.HasFont() )
1718     {
1719         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1720         //     but using it doesn't seem to hurt neither so leaving it for now
1721
1722         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1723                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1724
1725         // fill in data from LOGFONT but recalculate lfHeight because we need
1726         // the real height in twips and not the negative number which
1727         // wxFillLogFont() returns (this is correct in general and works with
1728         // the Windows font mapper, but not here)
1729         LOGFONT lf;
1730         wxFillLogFont(&lf, &style.GetFont());
1731         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1732         cf.bCharSet = lf.lfCharSet;
1733         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1734         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1735
1736         // also deal with underline/italic/bold attributes: note that we must
1737         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1738         // style to allow clearing it
1739         if ( lf.lfItalic )
1740         {
1741             cf.dwEffects |= CFE_ITALIC;
1742         }
1743
1744         if ( lf.lfWeight == FW_BOLD )
1745         {
1746             cf.dwEffects |= CFE_BOLD;
1747         }
1748
1749         if ( lf.lfUnderline )
1750         {
1751             cf.dwEffects |= CFE_UNDERLINE;
1752         }
1753
1754         // strikeout fonts are not supported by wxWindows
1755     }
1756
1757     if ( style.HasTextColour() )
1758     {
1759         cf.dwMask |= CFM_COLOR;
1760         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1761     }
1762
1763 #if wxUSE_RICHEDIT2
1764     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
1765     {
1766         cf.dwMask |= CFM_BACKCOLOR;
1767         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1768     }
1769 #endif // wxUSE_RICHEDIT2
1770
1771     // do format the selection
1772     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1773                             SCF_SELECTION, (LPARAM)&cf) != 0;
1774     if ( !ok )
1775     {
1776         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1777     }
1778
1779     if ( changeSel )
1780     {
1781         // restore the original selection
1782         DoSetSelection(startOld, endOld, FALSE);
1783     }
1784
1785     return ok;
1786 }
1787
1788 // ----------------------------------------------------------------------------
1789 // wxRichEditModule
1790 // ----------------------------------------------------------------------------
1791
1792 bool wxRichEditModule::OnInit()
1793 {
1794     // don't do anything - we will load it when needed
1795     return TRUE;
1796 }
1797
1798 void wxRichEditModule::OnExit()
1799 {
1800     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
1801     {
1802         if ( ms_hRichEdit[i] )
1803         {
1804             ::FreeLibrary(ms_hRichEdit[i]);
1805         }
1806     }
1807 }
1808
1809 /* static */
1810 bool wxRichEditModule::Load(int version)
1811 {
1812     // we don't support loading richedit 3.0 as I don't know how to distinguish
1813     // it from 2.0 anyhow
1814     wxCHECK_MSG( version == 1 || version == 2, FALSE,
1815                  _T("incorrect richedit control version requested") );
1816
1817     // make it the index in the array
1818     version--;
1819
1820     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
1821     {
1822         // we had already tried to load it and failed
1823         return FALSE;
1824     }
1825
1826     if ( ms_hRichEdit[version] )
1827     {
1828         // we've already got this one
1829         return TRUE;
1830     }
1831
1832     wxString dllname = version ? _T("riched20") : _T("riched32");
1833     dllname += _T(".dll");
1834
1835     ms_hRichEdit[version] = ::LoadLibrary(dllname);
1836
1837     if ( !ms_hRichEdit[version] )
1838     {
1839         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1840
1841         ms_hRichEdit[version] = (HINSTANCE)-1;
1842
1843         return FALSE;
1844     }
1845
1846     return TRUE;
1847 }
1848
1849 #endif // wxUSE_RICHEDIT
1850
1851 #endif // wxUSE_TEXTCTRL