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 #ifdef __WIN32__
 696
 697 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 698 {
 699     SetFocus();
 700
 701     size_t lenOld = GetValue().length();
 702
 703     wxUint32 code = event.GetRawKeyCode();
 704     ::keybd_event(code, 0, 0 /* key press */, NULL);
 705     ::keybd_event(code, 0, KEYEVENTF_KEYUP, NULL);
 706
 707     // assume that any alphanumeric key changes the total number of characters
 708     // in the control - this should work in 99% of cases
 709     return GetValue().length() != lenOld;
 710 }
 711
 712 #endif // __WIN32__
 713
 714 // ----------------------------------------------------------------------------
 715 // Clipboard operations
 716 // ----------------------------------------------------------------------------
 717
 718 void wxTextCtrl::Copy()
 719 {
 720     if (CanCopy())
 721     {
 722         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
 723     }
 724 }
 725
 726 void wxTextCtrl::Cut()
 727 {
 728     if (CanCut())
 729     {
 730         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
 731     }
 732 }
 733
 734 void wxTextCtrl::Paste()
 735 {
 736     if (CanPaste())
 737     {
 738         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
 739     }
 740 }
 741
 742 bool wxTextCtrl::CanCopy() const
 743 {
 744     // Can copy if there's a selection
 745     long from, to;
 746     GetSelection(&from, &to);
 747     return from != to;
 748 }
 749
 750 bool wxTextCtrl::CanCut() const
 751 {
 752     return CanCopy() && IsEditable();
 753 }
 754
 755 bool wxTextCtrl::CanPaste() const
 756 {
 757     if ( !IsEditable() )
 758         return FALSE;
 759
 760 #if wxUSE_RICHEDIT
 761     if ( IsRich() )
 762     {
 763         UINT cf = 0; // 0 == any format
 764
 765         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 766     }
 767 #endif // wxUSE_RICHEDIT
 768
 769     // Standard edit control: check for straight text on clipboard
 770     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 771         return FALSE;
 772
 773     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 774     ::CloseClipboard();
 775
 776     return isTextAvailable;
 777 }
 778
 779 // ----------------------------------------------------------------------------
 780 // Accessors
 781 // ----------------------------------------------------------------------------
 782
 783 void wxTextCtrl::SetEditable(bool editable)
 784 {
 785     HWND hWnd = GetHwnd();
 786     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 787 }
 788
 789 void wxTextCtrl::SetInsertionPoint(long pos)
 790 {
 791     DoSetSelection(pos, pos);
 792 }
 793
 794 void wxTextCtrl::SetInsertionPointEnd()
 795 {
 796     long pos;
 797
 798 #if wxUSE_RICHEDIT
 799     if ( m_verRichEdit == 1 )
 800     {
 801         // we don't have to waste time calling GetLastPosition() in this case
 802         pos = -1;
 803     }
 804     else // !RichEdit 1.0
 805 #endif // wxUSE_RICHEDIT
 806     {
 807         pos = GetLastPosition();
 808     }
 809
 810     SetInsertionPoint(pos);
 811 }
 812
 813 long wxTextCtrl::GetInsertionPoint() const
 814 {
 815 #if wxUSE_RICHEDIT
 816     if ( IsRich() )
 817     {
 818         CHARRANGE range;
 819         range.cpMin = 0;
 820         range.cpMax = 0;
 821         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 822         return range.cpMin;
 823     }
 824 #endif // wxUSE_RICHEDIT
 825
 826     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 827     return Pos & 0xFFFF;
 828 }
 829
 830 long wxTextCtrl::GetLastPosition() const
 831 {
 832     int numLines = GetNumberOfLines();
 833     long posStartLastLine = XYToPosition(0, numLines - 1);
 834
 835     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
 836
 837     return posStartLastLine + lenLastLine;
 838 }
 839
 840 // If the return values from and to are the same, there is no
 841 // selection.
 842 void wxTextCtrl::GetSelection(long* from, long* to) const
 843 {
 844 #if wxUSE_RICHEDIT
 845     if ( IsRich() )
 846     {
 847         CHARRANGE charRange;
 848         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 849
 850         *from = charRange.cpMin;
 851         *to = charRange.cpMax;
 852     }
 853     else
 854 #endif // !wxUSE_RICHEDIT
 855     {
 856         DWORD dwStart, dwEnd;
 857         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 858
 859         *from = dwStart;
 860         *to = dwEnd;
 861     }
 862 }
 863
 864 bool wxTextCtrl::IsEditable() const
 865 {
 866     // strangely enough, we may be called before the control is created: our
 867     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
 868     // us
 869     if ( !m_hWnd )
 870         return TRUE;
 871
 872     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 873
 874     return (style & ES_READONLY) == 0;
 875 }
 876
 877 // ----------------------------------------------------------------------------
 878 // selection
 879 // ----------------------------------------------------------------------------
 880
 881 void wxTextCtrl::SetSelection(long from, long to)
 882 {
 883     // if from and to are both -1, it means (in wxWindows) that all text should
 884     // be selected - translate into Windows convention
 885     if ( (from == -1) && (to == -1) )
 886     {
 887         from = 0;
 888         to = -1;
 889     }
 890
 891     DoSetSelection(from, to);
 892 }
 893
 894 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 895 {
 896     HWND hWnd = GetHwnd();
 897
 898 #ifdef __WIN32__
 899 #if wxUSE_RICHEDIT
 900     if ( IsRich() )
 901     {
 902         CHARRANGE range;
 903         range.cpMin = from;
 904         range.cpMax = to;
 905         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 906     }
 907     else
 908 #endif // wxUSE_RICHEDIT
 909     {
 910         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
 911     }
 912
 913     if ( scrollCaret )
 914     {
 915         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 916     }
 917 #else // Win16
 918     // WPARAM is 0: selection is scrolled into view
 919     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
 920 #endif // Win32/16
 921 }
 922
 923 // ----------------------------------------------------------------------------
 924 // Editing
 925 // ----------------------------------------------------------------------------
 926
 927 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 928 {
 929     // Set selection and remove it
 930     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
 931
 932     SendMessage(GetHwnd(), EM_REPLACESEL,
 933 #ifdef __WIN32__
 934                 TRUE,
 935 #else
 936                 FALSE,
 937 #endif
 938                 (LPARAM)value.c_str());
 939 }
 940
 941 void wxTextCtrl::Remove(long from, long to)
 942 {
 943     Replace(from, to, _T(""));
 944 }
 945
 946 bool wxTextCtrl::LoadFile(const wxString& file)
 947 {
 948     if ( wxTextCtrlBase::LoadFile(file) )
 949     {
 950         // update the size limit if needed
 951         AdjustSpaceLimit();
 952
 953         return TRUE;
 954     }
 955
 956     return FALSE;
 957 }
 958
 959 bool wxTextCtrl::IsModified() const
 960 {
 961     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
 962 }
 963
 964 // Makes 'unmodified'
 965 void wxTextCtrl::DiscardEdits()
 966 {
 967     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 968 }
 969
 970 int wxTextCtrl::GetNumberOfLines() const
 971 {
 972     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 973 }
 974
 975 long wxTextCtrl::XYToPosition(long x, long y) const
 976 {
 977     // This gets the char index for the _beginning_ of this line
 978     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 979
 980     return charIndex + x;
 981 }
 982
 983 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 984 {
 985     HWND hWnd = GetHwnd();
 986
 987     // This gets the line number containing the character
 988     long lineNo;
 989 #if wxUSE_RICHEDIT
 990     if ( IsRich() )
 991     {
 992         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 993     }
 994     else
 995 #endif // wxUSE_RICHEDIT
 996     {
 997         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 998     }
 999
1000     if ( lineNo == -1 )
1001     {
1002         // no such line
1003         return FALSE;
1004     }
1005
1006     // This gets the char index for the _beginning_ of this line
1007     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1008     if ( charIndex == -1 )
1009     {
1010         return FALSE;
1011     }
1012
1013     // The X position must therefore be the different between pos and charIndex
1014     if ( x )
1015         *x = pos - charIndex;
1016     if ( y )
1017         *y = lineNo;
1018
1019     return TRUE;
1020 }
1021
1022 void wxTextCtrl::ShowPosition(long pos)
1023 {
1024     HWND hWnd = GetHwnd();
1025
1026     // To scroll to a position, we pass the number of lines and characters
1027     // to scroll *by*. This means that we need to:
1028     // (1) Find the line position of the current line.
1029     // (2) Find the line position of pos.
1030     // (3) Scroll by (pos - current).
1031     // For now, ignore the horizontal scrolling.
1032
1033     // Is this where scrolling is relative to - the line containing the caret?
1034     // Or is the first visible line??? Try first visible line.
1035 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1036
1037     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1038
1039     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1040
1041     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1042
1043     if (linesToScroll != 0)
1044       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1045 }
1046
1047 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1048 {
1049     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1050 }
1051
1052 int wxTextCtrl::GetLineLength(long lineNo) const
1053 {
1054     long pos = XYToPosition(0, lineNo);
1055
1056     return GetLengthOfLineContainingPos(pos);
1057 }
1058
1059 wxString wxTextCtrl::GetLineText(long lineNo) const
1060 {
1061     size_t len = (size_t)GetLineLength(lineNo) + 1;
1062
1063     // there must be at least enough place for the length WORD in the
1064     // buffer
1065     len += sizeof(WORD);
1066
1067     wxString str;
1068     wxChar *buf = str.GetWriteBuf(len);
1069
1070     *(WORD *)buf = (WORD)len;
1071     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1072     buf[len] = 0;
1073
1074     str.UngetWriteBuf(len);
1075
1076     return str;
1077 }
1078
1079 void wxTextCtrl::SetMaxLength(unsigned long len)
1080 {
1081     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1082 }
1083
1084 // ----------------------------------------------------------------------------
1085 // Undo/redo
1086 // ----------------------------------------------------------------------------
1087
1088 void wxTextCtrl::Undo()
1089 {
1090     if (CanUndo())
1091     {
1092         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1093     }
1094 }
1095
1096 void wxTextCtrl::Redo()
1097 {
1098     if (CanRedo())
1099     {
1100         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1101         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1102     }
1103 }
1104
1105 bool wxTextCtrl::CanUndo() const
1106 {
1107     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1108 }
1109
1110 bool wxTextCtrl::CanRedo() const
1111 {
1112     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1113 }
1114
1115 // ----------------------------------------------------------------------------
1116 // implemenation details
1117 // ----------------------------------------------------------------------------
1118
1119 void wxTextCtrl::Command(wxCommandEvent & event)
1120 {
1121     SetValue(event.GetString());
1122     ProcessCommand (event);
1123 }
1124
1125 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1126 {
1127     // By default, load the first file into the text window.
1128     if (event.GetNumberOfFiles() > 0)
1129     {
1130         LoadFile(event.GetFiles()[0]);
1131     }
1132 }
1133
1134 // ----------------------------------------------------------------------------
1135 // kbd input processing
1136 // ----------------------------------------------------------------------------
1137
1138 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1139 {
1140     MSG *msg = (MSG *)pMsg;
1141
1142     // check for our special keys here: if we don't do it and the parent frame
1143     // uses them as accelerators, they wouldn't work at all, so we disable
1144     // usual preprocessing for them
1145     if ( msg->message == WM_KEYDOWN )
1146     {
1147         WORD vkey = (WORD) msg->wParam;
1148         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1149         {
1150             if ( vkey == VK_BACK )
1151                 return FALSE;
1152         }
1153         else // no Alt
1154         {
1155             if ( wxIsCtrlDown() )
1156             {
1157                 switch ( vkey )
1158                 {
1159                     case 'C':
1160                     case 'V':
1161                     case 'X':
1162                     case VK_INSERT:
1163                     case VK_DELETE:
1164                     case VK_HOME:
1165                     case VK_END:
1166                         return FALSE;
1167                 }
1168             }
1169             else if ( wxIsShiftDown() )
1170             {
1171                 if ( vkey == VK_INSERT || vkey == VK_DELETE )
1172                     return FALSE;
1173             }
1174         }
1175     }
1176
1177     return wxControl::MSWShouldPreProcessMessage(pMsg);
1178 }
1179
1180 void wxTextCtrl::OnChar(wxKeyEvent& event)
1181 {
1182     switch ( event.KeyCode() )
1183     {
1184         case WXK_RETURN:
1185             if ( !(m_windowStyle & wxTE_MULTILINE) )
1186             {
1187                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1188                 InitCommandEvent(event);
1189                 event.SetString(GetValue());
1190                 if ( GetEventHandler()->ProcessEvent(event) )
1191                     return;
1192             }
1193             //else: multiline controls need Enter for themselves
1194
1195             break;
1196
1197         case WXK_TAB:
1198             // always produce navigation event - even if we process TAB
1199             // ourselves the fact that we got here means that the user code
1200             // decided to skip processing of this TAB - probably to let it
1201             // do its default job.
1202             {
1203                 wxNavigationKeyEvent eventNav;
1204                 eventNav.SetDirection(!event.ShiftDown());
1205                 eventNav.SetWindowChange(event.ControlDown());
1206                 eventNav.SetEventObject(this);
1207
1208                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1209                     return;
1210             }
1211             break;
1212     }
1213
1214     // no, we didn't process it
1215     event.Skip();
1216 }
1217
1218 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1219 {
1220     if ( nMsg == WM_GETDLGCODE )
1221     {
1222         // we always want the chars and the arrows
1223         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1224
1225         // we may have several different cases:
1226         // 1. normal case: both TAB and ENTER are used for dialog navigation
1227         // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1228         //    next control in the dialog
1229         // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1230         //    navigation
1231         // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass
1232         //    to the next control
1233
1234         // the multiline edit control should always get <Return> for itself
1235         if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1236             lDlgCode |= DLGC_WANTMESSAGE;
1237
1238         if ( HasFlag(wxTE_PROCESS_TAB) )
1239             lDlgCode |= DLGC_WANTTAB;
1240
1241         return lDlgCode;
1242     }
1243
1244     return wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1245 }
1246
1247 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1248 {
1249     switch (param)
1250     {
1251         case EN_SETFOCUS:
1252         case EN_KILLFOCUS:
1253             {
1254                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1255                                                          : wxEVT_SET_FOCUS,
1256                                    m_windowId);
1257                 event.SetEventObject( this );
1258                 GetEventHandler()->ProcessEvent(event);
1259             }
1260             break;
1261
1262         case EN_CHANGE:
1263             {
1264                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1265                 InitCommandEvent(event);
1266                 event.SetString(GetValue());
1267                 ProcessCommand(event);
1268             }
1269             break;
1270
1271         case EN_MAXTEXT:
1272             // the text size limit has been hit - increase it
1273             if ( !AdjustSpaceLimit() )
1274             {
1275                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1276                 InitCommandEvent(event);
1277                 event.SetString(GetValue());
1278                 ProcessCommand(event);
1279             }
1280             break;
1281
1282             // the other notification messages are not processed
1283         case EN_UPDATE:
1284         case EN_ERRSPACE:
1285         case EN_HSCROLL:
1286         case EN_VSCROLL:
1287             return FALSE;
1288         default:
1289             return FALSE;
1290     }
1291
1292     // processed
1293     return TRUE;
1294 }
1295
1296 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1297 #if wxUSE_CTL3D
1298                                WXUINT message,
1299                                WXWPARAM wParam,
1300                                WXLPARAM lParam
1301 #else
1302                                WXUINT WXUNUSED(message),
1303                                WXWPARAM WXUNUSED(wParam),
1304                                WXLPARAM WXUNUSED(lParam)
1305 #endif
1306     )
1307 {
1308 #if wxUSE_CTL3D
1309     if ( m_useCtl3D )
1310     {
1311         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1312         return (WXHBRUSH) hbrush;
1313     }
1314 #endif // wxUSE_CTL3D
1315
1316     HDC hdc = (HDC)pDC;
1317     if (GetParent()->GetTransparentBackground())
1318         SetBkMode(hdc, TRANSPARENT);
1319     else
1320         SetBkMode(hdc, OPAQUE);
1321
1322     wxColour colBack = GetBackgroundColour();
1323
1324     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1325         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1326
1327     ::SetBkColor(hdc, wxColourToRGB(colBack));
1328     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1329
1330     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1331
1332     return (WXHBRUSH)brush->GetResourceHandle();
1333 }
1334
1335 // In WIN16, need to override normal erasing because
1336 // Ctl3D doesn't use the wxWindows background colour.
1337 #ifdef __WIN16__
1338 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1339 {
1340     wxColour col(m_backgroundColour);
1341
1342 #if wxUSE_CTL3D
1343     if (m_useCtl3D)
1344         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1345 #endif
1346
1347     RECT rect;
1348     ::GetClientRect(GetHwnd(), &rect);
1349
1350     COLORREF ref = wxColourToRGB(col);
1351     HBRUSH hBrush = ::CreateSolidBrush(ref);
1352     if ( !hBrush )
1353         wxLogLastError(wxT("CreateSolidBrush"));
1354
1355     HDC hdc = (HDC)event.GetDC()->GetHDC();
1356
1357     int mode = ::SetMapMode(hdc, MM_TEXT);
1358
1359     ::FillRect(hdc, &rect, hBrush);
1360     ::DeleteObject(hBrush);
1361     ::SetMapMode(hdc, mode);
1362
1363 }
1364 #endif // Win16
1365
1366 bool wxTextCtrl::AdjustSpaceLimit()
1367 {
1368 #ifndef __WIN16__
1369     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1370
1371     // HACK: we try to automatically extend the limit for the amount of text
1372     //       to allow (interactively) entering more than 64Kb of text under
1373     //       Win9x but we shouldn't reset the text limit which was previously
1374     //       set explicitly with SetMaxLength()
1375     //
1376     //       we could solve this by storing the limit we set in wxTextCtrl but
1377     //       to save space we prefer to simply test here the actual limit
1378     //       value: we consider that SetMaxLength() can only be called for
1379     //       values < 32Kb
1380     if ( limit < 0x8000 )
1381     {
1382         // we've got more text than limit set by SetMaxLength()
1383         return FALSE;
1384     }
1385
1386     unsigned int len = ::GetWindowTextLength(GetHwnd());
1387     if ( len >= limit )
1388     {
1389         limit = len + 0x8000;    // 32Kb
1390
1391 #if wxUSE_RICHEDIT
1392         if ( IsRich() )
1393         {
1394             // as a nice side effect, this also allows passing limit > 64Kb
1395             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1396         }
1397         else
1398 #endif // wxUSE_RICHEDIT
1399         {
1400             if ( limit > 0xffff )
1401             {
1402                 // this will set it to a platform-dependent maximum (much more
1403                 // than 64Kb under NT)
1404                 limit = 0;
1405             }
1406
1407             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1408         }
1409     }
1410 #endif // !Win16
1411
1412     // we changed the limit
1413     return TRUE;
1414 }
1415
1416 bool wxTextCtrl::AcceptsFocus() const
1417 {
1418     // we don't want focus if we can't be edited
1419     return IsEditable() && wxControl::AcceptsFocus();
1420 }
1421
1422 wxSize wxTextCtrl::DoGetBestSize() const
1423 {
1424     int cx, cy;
1425     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1426
1427     int wText = DEFAULT_ITEM_WIDTH;
1428
1429     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1430     if ( m_windowStyle & wxTE_MULTILINE )
1431     {
1432         hText *= wxMax(GetNumberOfLines(), 5);
1433     }
1434     //else: for single line control everything is ok
1435
1436     return wxSize(wText, hText);
1437 }
1438
1439 // ----------------------------------------------------------------------------
1440 // standard handlers for standard edit menu events
1441 // ----------------------------------------------------------------------------
1442
1443 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1444 {
1445     Cut();
1446 }
1447
1448 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1449 {
1450     Copy();
1451 }
1452
1453 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1454 {
1455     Paste();
1456 }
1457
1458 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1459 {
1460     Undo();
1461 }
1462
1463 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1464 {
1465     Redo();
1466 }
1467
1468 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1469 {
1470     event.Enable( CanCut() );
1471 }
1472
1473 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1474 {
1475     event.Enable( CanCopy() );
1476 }
1477
1478 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1479 {
1480     event.Enable( CanPaste() );
1481 }
1482
1483 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1484 {
1485     event.Enable( CanUndo() );
1486 }
1487
1488 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1489 {
1490     event.Enable( CanRedo() );
1491 }
1492
1493 // the rest of the file only deals with the rich edit controls
1494 #if wxUSE_RICHEDIT
1495
1496 // ----------------------------------------------------------------------------
1497 // EN_LINK processing
1498 // ----------------------------------------------------------------------------
1499
1500 bool wxTextCtrl::MSWOnNotify(int WXUNUSED(idCtrl), WXLPARAM lParam, WXLPARAM *result)
1501 {
1502     NMHDR *hdr = (NMHDR* )lParam;
1503     if ( hdr->code == EN_LINK )
1504     {
1505         ENLINK *enlink = (ENLINK *)hdr;
1506
1507         switch ( enlink->msg )
1508         {
1509             case WM_SETCURSOR:
1510                 // ok, so it is hardcoded - do we really nee to customize it?
1511                 ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1512                 *result = TRUE;
1513                 break;
1514             case WM_MOUSEMOVE:
1515             case WM_LBUTTONDOWN:
1516             case WM_LBUTTONUP:
1517             case WM_LBUTTONDBLCLK:
1518             case WM_RBUTTONDOWN:
1519             case WM_RBUTTONUP:
1520             case WM_RBUTTONDBLCLK:
1521                 // send a mouse event
1522                 {
1523                     static const wxEventType eventsMouse[] =
1524                     {
1525                         wxEVT_MOTION,
1526                         wxEVT_LEFT_DOWN,
1527                         wxEVT_LEFT_UP,
1528                         wxEVT_LEFT_DCLICK,
1529                         wxEVT_RIGHT_DOWN,
1530                         wxEVT_RIGHT_UP,
1531                         wxEVT_RIGHT_DCLICK,
1532                     };
1533
1534                     // the event ids are consecutive
1535                     wxMouseEvent
1536                         evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1537
1538                     InitMouseEvent(evtMouse,
1539                                    GET_X_LPARAM(enlink->lParam),
1540                                    GET_Y_LPARAM(enlink->lParam),
1541                                    enlink->wParam);
1542
1543                     wxTextUrlEvent event(m_windowId, evtMouse,
1544                                          enlink->chrg.cpMin,
1545                                          enlink->chrg.cpMax);
1546
1547                     InitCommandEvent(event);
1548
1549                     *result = ProcessCommand(event);
1550                 }
1551                 break;
1552         }
1553
1554         return TRUE;
1555     }
1556
1557     // not processed
1558     return FALSE;
1559 }
1560
1561 // ----------------------------------------------------------------------------
1562 // colour setting for the rich edit controls
1563 // ----------------------------------------------------------------------------
1564
1565 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1566 {
1567     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1568     {
1569         // colour didn't really change
1570         return FALSE;
1571     }
1572
1573     if ( IsRich() )
1574     {
1575         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1576         // EM_SETBKGNDCOLOR additionally
1577         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1578     }
1579
1580     return TRUE;
1581 }
1582
1583 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1584 {
1585     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1586     {
1587         // colour didn't really change
1588         return FALSE;
1589     }
1590
1591     if ( IsRich() )
1592     {
1593         // change the colour of everything
1594         CHARFORMAT cf;
1595         wxZeroMemory(cf);
1596         cf.cbSize = sizeof(cf);
1597         cf.dwMask = CFM_COLOR;
1598         cf.crTextColor = wxColourToRGB(colour);
1599         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1600     }
1601
1602     return TRUE;
1603 }
1604
1605 // ----------------------------------------------------------------------------
1606 // styling support for rich edit controls
1607 // ----------------------------------------------------------------------------
1608
1609 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1610 {
1611     if ( !IsRich() )
1612     {
1613         // can't do it with normal text control
1614         return FALSE;
1615     }
1616
1617     // the richedit 1.0 doesn't handle setting background colour, so don't
1618     // even try to do anything if it's the only thing we want to change
1619     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() )
1620     {
1621         // nothing to do: return TRUE if there was really nothing to do and
1622         // FALSE if we failed to set bg colour
1623         return !style.HasBackgroundColour();
1624     }
1625
1626     // order the range if needed
1627     if ( start > end )
1628     {
1629         long tmp = start;
1630         start = end;
1631         end = tmp;
1632     }
1633
1634     // we can only change the format of the selection, so select the range we
1635     // want and restore the old selection later
1636     long startOld, endOld;
1637     GetSelection(&startOld, &endOld);
1638
1639     // but do we really have to change the selection?
1640     bool changeSel = start != startOld || end != endOld;
1641
1642     if ( changeSel )
1643     {
1644         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
1645     }
1646
1647     // initialize CHARFORMAT struct
1648 #if wxUSE_RICHEDIT2
1649     CHARFORMAT2 cf;
1650 #else
1651     CHARFORMAT cf;
1652 #endif
1653
1654     wxZeroMemory(cf);
1655
1656     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
1657     // CHARFORMAT in that case
1658 #if wxUSE_RICHEDIT2
1659     if ( m_verRichEdit == 1 )
1660     {
1661         // this is the only thing the control is going to grok
1662         cf.cbSize = sizeof(CHARFORMAT);
1663     }
1664     else
1665 #endif
1666     {
1667         // CHARFORMAT or CHARFORMAT2
1668         cf.cbSize = sizeof(cf);
1669     }
1670
1671     if ( style.HasFont() )
1672     {
1673         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1674         //     but using it doesn't seem to hurt neither so leaving it for now
1675
1676         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1677                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1678
1679         // fill in data from LOGFONT but recalculate lfHeight because we need
1680         // the real height in twips and not the negative number which
1681         // wxFillLogFont() returns (this is correct in general and works with
1682         // the Windows font mapper, but not here)
1683         LOGFONT lf;
1684         wxFillLogFont(&lf, &style.GetFont());
1685         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1686         cf.bCharSet = lf.lfCharSet;
1687         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1688         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1689
1690         // also deal with underline/italic/bold attributes: note that we must
1691         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1692         // style to allow clearing it
1693         if ( lf.lfItalic )
1694         {
1695             cf.dwEffects |= CFE_ITALIC;
1696         }
1697
1698         if ( lf.lfWeight == FW_BOLD )
1699         {
1700             cf.dwEffects |= CFE_BOLD;
1701         }
1702
1703         if ( lf.lfUnderline )
1704         {
1705             cf.dwEffects |= CFE_UNDERLINE;
1706         }
1707
1708         // strikeout fonts are not supported by wxWindows
1709     }
1710
1711     if ( style.HasTextColour() )
1712     {
1713         cf.dwMask |= CFM_COLOR;
1714         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1715     }
1716
1717 #if wxUSE_RICHEDIT2
1718     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
1719     {
1720         cf.dwMask |= CFM_BACKCOLOR;
1721         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1722     }
1723 #endif // wxUSE_RICHEDIT2
1724
1725     // do format the selection
1726     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1727                             SCF_SELECTION, (LPARAM)&cf) != 0;
1728     if ( !ok )
1729     {
1730         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1731     }
1732
1733     if ( changeSel )
1734     {
1735         // restore the original selection
1736         DoSetSelection(startOld, endOld, FALSE);
1737     }
1738
1739     return ok;
1740 }
1741
1742 // ----------------------------------------------------------------------------
1743 // wxRichEditModule
1744 // ----------------------------------------------------------------------------
1745
1746 bool wxRichEditModule::OnInit()
1747 {
1748     // don't do anything - we will load it when needed
1749     return TRUE;
1750 }
1751
1752 void wxRichEditModule::OnExit()
1753 {
1754     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
1755     {
1756         if ( ms_hRichEdit[i] )
1757         {
1758             ::FreeLibrary(ms_hRichEdit[i]);
1759         }
1760     }
1761 }
1762
1763 /* static */
1764 bool wxRichEditModule::Load(int version)
1765 {
1766     // we don't support loading richedit 3.0 as I don't know how to distinguish
1767     // it from 2.0 anyhow
1768     wxCHECK_MSG( version == 1 || version == 2, FALSE,
1769                  _T("incorrect richedit control version requested") );
1770
1771     // make it the index in the array
1772     version--;
1773
1774     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
1775     {
1776         // we had already tried to load it and failed
1777         return FALSE;
1778     }
1779
1780     if ( ms_hRichEdit[version] )
1781     {
1782         // we've already got this one
1783         return TRUE;
1784     }
1785
1786     wxString dllname = version ? _T("riched20") : _T("riched32");
1787     dllname += _T(".dll");
1788
1789     ms_hRichEdit[version] = ::LoadLibrary(dllname);
1790
1791     if ( !ms_hRichEdit[version] )
1792     {
1793         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1794
1795         ms_hRichEdit[version] = (HINSTANCE)-1;
1796
1797         return FALSE;
1798     }
1799
1800     return TRUE;
1801 }
1802
1803 #endif // wxUSE_RICHEDIT
1804
1805 #endif // wxUSE_TEXTCTRL