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             // This eliminates an annoying flashing effect
 683             // when replacing all text.
 684             Clear();
 685         }
 686
 687         ::SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 688     }
 689
 690     AdjustSpaceLimit();
 691 }
 692
 693 void wxTextCtrl::AppendText(const wxString& text)
 694 {
 695     SetInsertionPointEnd();
 696
 697     WriteText(text);
 698 }
 699
 700 void wxTextCtrl::Clear()
 701 {
 702     ::SetWindowText(GetHwnd(), wxT(""));
 703 }
 704
 705 #ifdef __WIN32__
 706
 707 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 708 {
 709     SetFocus();
 710
 711     size_t lenOld = GetValue().length();
 712
 713     wxUint32 code = event.GetRawKeyCode();
 714     ::keybd_event(code, 0, 0 /* key press */, 0);
 715     ::keybd_event(code, 0, KEYEVENTF_KEYUP, 0);
 716
 717     // assume that any alphanumeric key changes the total number of characters
 718     // in the control - this should work in 99% of cases
 719     return GetValue().length() != lenOld;
 720 }
 721
 722 #endif // __WIN32__
 723
 724 // ----------------------------------------------------------------------------
 725 // Clipboard operations
 726 // ----------------------------------------------------------------------------
 727
 728 void wxTextCtrl::Copy()
 729 {
 730     if (CanCopy())
 731     {
 732         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
 733     }
 734 }
 735
 736 void wxTextCtrl::Cut()
 737 {
 738     if (CanCut())
 739     {
 740         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
 741     }
 742 }
 743
 744 void wxTextCtrl::Paste()
 745 {
 746     if (CanPaste())
 747     {
 748         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
 749     }
 750 }
 751
 752 bool wxTextCtrl::CanCopy() const
 753 {
 754     // Can copy if there's a selection
 755     long from, to;
 756     GetSelection(&from, &to);
 757     return from != to;
 758 }
 759
 760 bool wxTextCtrl::CanCut() const
 761 {
 762     return CanCopy() && IsEditable();
 763 }
 764
 765 bool wxTextCtrl::CanPaste() const
 766 {
 767     if ( !IsEditable() )
 768         return FALSE;
 769
 770 #if wxUSE_RICHEDIT
 771     if ( IsRich() )
 772     {
 773         UINT cf = 0; // 0 == any format
 774
 775         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 776     }
 777 #endif // wxUSE_RICHEDIT
 778
 779     // Standard edit control: check for straight text on clipboard
 780     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 781         return FALSE;
 782
 783     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 784     ::CloseClipboard();
 785
 786     return isTextAvailable;
 787 }
 788
 789 // ----------------------------------------------------------------------------
 790 // Accessors
 791 // ----------------------------------------------------------------------------
 792
 793 void wxTextCtrl::SetEditable(bool editable)
 794 {
 795     HWND hWnd = GetHwnd();
 796     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 797 }
 798
 799 void wxTextCtrl::SetInsertionPoint(long pos)
 800 {
 801     DoSetSelection(pos, pos);
 802 }
 803
 804 void wxTextCtrl::SetInsertionPointEnd()
 805 {
 806     long pos;
 807
 808 #if wxUSE_RICHEDIT
 809     if ( m_verRichEdit == 1 )
 810     {
 811         // we don't have to waste time calling GetLastPosition() in this case
 812         pos = -1;
 813     }
 814     else // !RichEdit 1.0
 815 #endif // wxUSE_RICHEDIT
 816     {
 817         pos = GetLastPosition();
 818     }
 819
 820     SetInsertionPoint(pos);
 821 }
 822
 823 long wxTextCtrl::GetInsertionPoint() const
 824 {
 825 #if wxUSE_RICHEDIT
 826     if ( IsRich() )
 827     {
 828         CHARRANGE range;
 829         range.cpMin = 0;
 830         range.cpMax = 0;
 831         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 832         return range.cpMin;
 833     }
 834 #endif // wxUSE_RICHEDIT
 835
 836     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 837     return Pos & 0xFFFF;
 838 }
 839
 840 long wxTextCtrl::GetLastPosition() const
 841 {
 842     int numLines = GetNumberOfLines();
 843     long posStartLastLine = XYToPosition(0, numLines - 1);
 844
 845     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
 846
 847     return posStartLastLine + lenLastLine;
 848 }
 849
 850 // If the return values from and to are the same, there is no
 851 // selection.
 852 void wxTextCtrl::GetSelection(long* from, long* to) const
 853 {
 854 #if wxUSE_RICHEDIT
 855     if ( IsRich() )
 856     {
 857         CHARRANGE charRange;
 858         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 859
 860         *from = charRange.cpMin;
 861         *to = charRange.cpMax;
 862     }
 863     else
 864 #endif // !wxUSE_RICHEDIT
 865     {
 866         DWORD dwStart, dwEnd;
 867         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 868
 869         *from = dwStart;
 870         *to = dwEnd;
 871     }
 872 }
 873
 874 bool wxTextCtrl::IsEditable() const
 875 {
 876     // strangely enough, we may be called before the control is created: our
 877     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
 878     // us
 879     if ( !m_hWnd )
 880         return TRUE;
 881
 882     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 883
 884     return (style & ES_READONLY) == 0;
 885 }
 886
 887 // ----------------------------------------------------------------------------
 888 // selection
 889 // ----------------------------------------------------------------------------
 890
 891 void wxTextCtrl::SetSelection(long from, long to)
 892 {
 893     // if from and to are both -1, it means (in wxWindows) that all text should
 894     // be selected - translate into Windows convention
 895     if ( (from == -1) && (to == -1) )
 896     {
 897         from = 0;
 898         to = -1;
 899     }
 900
 901     DoSetSelection(from, to);
 902 }
 903
 904 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 905 {
 906     HWND hWnd = GetHwnd();
 907
 908 #ifdef __WIN32__
 909 #if wxUSE_RICHEDIT
 910     if ( IsRich() )
 911     {
 912         CHARRANGE range;
 913         range.cpMin = from;
 914         range.cpMax = to;
 915         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 916     }
 917     else
 918 #endif // wxUSE_RICHEDIT
 919     {
 920         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
 921     }
 922
 923     if ( scrollCaret )
 924     {
 925         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 926     }
 927 #else // Win16
 928     // WPARAM is 0: selection is scrolled into view
 929     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
 930 #endif // Win32/16
 931 }
 932
 933 // ----------------------------------------------------------------------------
 934 // Editing
 935 // ----------------------------------------------------------------------------
 936
 937 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 938 {
 939     // Set selection and remove it
 940     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
 941
 942     SendMessage(GetHwnd(), EM_REPLACESEL,
 943 #ifdef __WIN32__
 944                 TRUE,
 945 #else
 946                 FALSE,
 947 #endif
 948                 (LPARAM)value.c_str());
 949 }
 950
 951 void wxTextCtrl::Remove(long from, long to)
 952 {
 953     Replace(from, to, _T(""));
 954 }
 955
 956 bool wxTextCtrl::LoadFile(const wxString& file)
 957 {
 958     if ( wxTextCtrlBase::LoadFile(file) )
 959     {
 960         // update the size limit if needed
 961         AdjustSpaceLimit();
 962
 963         return TRUE;
 964     }
 965
 966     return FALSE;
 967 }
 968
 969 bool wxTextCtrl::IsModified() const
 970 {
 971     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
 972 }
 973
 974 // Makes 'unmodified'
 975 void wxTextCtrl::DiscardEdits()
 976 {
 977     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 978 }
 979
 980 int wxTextCtrl::GetNumberOfLines() const
 981 {
 982     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 983 }
 984
 985 long wxTextCtrl::XYToPosition(long x, long y) const
 986 {
 987     // This gets the char index for the _beginning_ of this line
 988     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 989
 990     return charIndex + x;
 991 }
 992
 993 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 994 {
 995     HWND hWnd = GetHwnd();
 996
 997     // This gets the line number containing the character
 998     long lineNo;
 999 #if wxUSE_RICHEDIT
1000     if ( IsRich() )
1001     {
1002         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1003     }
1004     else
1005 #endif // wxUSE_RICHEDIT
1006     {
1007         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1008     }
1009
1010     if ( lineNo == -1 )
1011     {
1012         // no such line
1013         return FALSE;
1014     }
1015
1016     // This gets the char index for the _beginning_ of this line
1017     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1018     if ( charIndex == -1 )
1019     {
1020         return FALSE;
1021     }
1022
1023     // The X position must therefore be the different between pos and charIndex
1024     if ( x )
1025         *x = pos - charIndex;
1026     if ( y )
1027         *y = lineNo;
1028
1029     return TRUE;
1030 }
1031
1032 void wxTextCtrl::ShowPosition(long pos)
1033 {
1034     HWND hWnd = GetHwnd();
1035
1036     // To scroll to a position, we pass the number of lines and characters
1037     // to scroll *by*. This means that we need to:
1038     // (1) Find the line position of the current line.
1039     // (2) Find the line position of pos.
1040     // (3) Scroll by (pos - current).
1041     // For now, ignore the horizontal scrolling.
1042
1043     // Is this where scrolling is relative to - the line containing the caret?
1044     // Or is the first visible line??? Try first visible line.
1045 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1046
1047     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1048
1049     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1050
1051     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1052
1053     if (linesToScroll != 0)
1054       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1055 }
1056
1057 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1058 {
1059     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1060 }
1061
1062 int wxTextCtrl::GetLineLength(long lineNo) const
1063 {
1064     long pos = XYToPosition(0, lineNo);
1065
1066     return GetLengthOfLineContainingPos(pos);
1067 }
1068
1069 wxString wxTextCtrl::GetLineText(long lineNo) const
1070 {
1071     size_t len = (size_t)GetLineLength(lineNo) + 1;
1072
1073     // there must be at least enough place for the length WORD in the
1074     // buffer
1075     len += sizeof(WORD);
1076
1077     wxString str;
1078     wxChar *buf = str.GetWriteBuf(len);
1079
1080     *(WORD *)buf = (WORD)len;
1081     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1082     buf[len] = 0;
1083
1084     str.UngetWriteBuf(len);
1085
1086     return str;
1087 }
1088
1089 void wxTextCtrl::SetMaxLength(unsigned long len)
1090 {
1091     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1092 }
1093
1094 // ----------------------------------------------------------------------------
1095 // Undo/redo
1096 // ----------------------------------------------------------------------------
1097
1098 void wxTextCtrl::Undo()
1099 {
1100     if (CanUndo())
1101     {
1102         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1103     }
1104 }
1105
1106 void wxTextCtrl::Redo()
1107 {
1108     if (CanRedo())
1109     {
1110         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1111         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1112     }
1113 }
1114
1115 bool wxTextCtrl::CanUndo() const
1116 {
1117     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1118 }
1119
1120 bool wxTextCtrl::CanRedo() const
1121 {
1122     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1123 }
1124
1125 // ----------------------------------------------------------------------------
1126 // implemenation details
1127 // ----------------------------------------------------------------------------
1128
1129 void wxTextCtrl::Command(wxCommandEvent & event)
1130 {
1131     SetValue(event.GetString());
1132     ProcessCommand (event);
1133 }
1134
1135 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1136 {
1137     // By default, load the first file into the text window.
1138     if (event.GetNumberOfFiles() > 0)
1139     {
1140         LoadFile(event.GetFiles()[0]);
1141     }
1142 }
1143
1144 // ----------------------------------------------------------------------------
1145 // kbd input processing
1146 // ----------------------------------------------------------------------------
1147
1148 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1149 {
1150     MSG *msg = (MSG *)pMsg;
1151
1152     // check for our special keys here: if we don't do it and the parent frame
1153     // uses them as accelerators, they wouldn't work at all, so we disable
1154     // usual preprocessing for them
1155     if ( msg->message == WM_KEYDOWN )
1156     {
1157         WORD vkey = (WORD) msg->wParam;
1158         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1159         {
1160             if ( vkey == VK_BACK )
1161                 return FALSE;
1162         }
1163         else // no Alt
1164         {
1165             if ( wxIsCtrlDown() )
1166             {
1167                 switch ( vkey )
1168                 {
1169                     case 'C':
1170                     case 'V':
1171                     case 'X':
1172                     case VK_INSERT:
1173                     case VK_DELETE:
1174                     case VK_HOME:
1175                     case VK_END:
1176                         return FALSE;
1177                 }
1178             }
1179             else if ( wxIsShiftDown() )
1180             {
1181                 if ( vkey == VK_INSERT || vkey == VK_DELETE )
1182                     return FALSE;
1183             }
1184         }
1185     }
1186
1187     return wxControl::MSWShouldPreProcessMessage(pMsg);
1188 }
1189
1190 void wxTextCtrl::OnChar(wxKeyEvent& event)
1191 {
1192     switch ( event.KeyCode() )
1193     {
1194         case WXK_RETURN:
1195             if ( !(m_windowStyle & wxTE_MULTILINE) )
1196             {
1197                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1198                 InitCommandEvent(event);
1199                 event.SetString(GetValue());
1200                 if ( GetEventHandler()->ProcessEvent(event) )
1201                     return;
1202             }
1203             //else: multiline controls need Enter for themselves
1204
1205             break;
1206
1207         case WXK_TAB:
1208             // always produce navigation event - even if we process TAB
1209             // ourselves the fact that we got here means that the user code
1210             // decided to skip processing of this TAB - probably to let it
1211             // do its default job.
1212             {
1213                 wxNavigationKeyEvent eventNav;
1214                 eventNav.SetDirection(!event.ShiftDown());
1215                 eventNav.SetWindowChange(event.ControlDown());
1216                 eventNav.SetEventObject(this);
1217
1218                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1219                     return;
1220             }
1221             break;
1222     }
1223
1224     // no, we didn't process it
1225     event.Skip();
1226 }
1227
1228 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1229 {
1230     long lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1231
1232     if ( nMsg == WM_GETDLGCODE )
1233     {
1234         // we always want the chars and the arrows
1235         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1236
1237         // we may have several different cases:
1238         // 1. normal case: both TAB and ENTER are used for dialog navigation
1239         // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1240         //    next control in the dialog
1241         // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1242         //    navigation
1243         // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass
1244         //    to the next control
1245
1246         // the multiline edit control should always get <Return> for itself
1247         if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1248             lDlgCode |= DLGC_WANTMESSAGE;
1249
1250         if ( HasFlag(wxTE_PROCESS_TAB) )
1251             lDlgCode |= DLGC_WANTTAB;
1252
1253         lRc |= lDlgCode;
1254     }
1255
1256     return lRc;
1257 }
1258
1259 // ----------------------------------------------------------------------------
1260 // text control event processing
1261 // ----------------------------------------------------------------------------
1262
1263 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1264 {
1265     switch (param)
1266     {
1267         case EN_SETFOCUS:
1268         case EN_KILLFOCUS:
1269             {
1270                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1271                                                          : wxEVT_SET_FOCUS,
1272                                    m_windowId);
1273                 event.SetEventObject( this );
1274                 GetEventHandler()->ProcessEvent(event);
1275             }
1276             break;
1277
1278         case EN_CHANGE:
1279             {
1280                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1281                 InitCommandEvent(event);
1282                 event.SetString(GetValue());
1283                 ProcessCommand(event);
1284             }
1285             break;
1286
1287         case EN_MAXTEXT:
1288             // the text size limit has been hit - increase it
1289             if ( !AdjustSpaceLimit() )
1290             {
1291                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1292                 InitCommandEvent(event);
1293                 event.SetString(GetValue());
1294                 ProcessCommand(event);
1295             }
1296             break;
1297
1298             // the other notification messages are not processed
1299         case EN_UPDATE:
1300         case EN_ERRSPACE:
1301         case EN_HSCROLL:
1302         case EN_VSCROLL:
1303             return FALSE;
1304
1305         default:
1306             return FALSE;
1307     }
1308
1309     // processed
1310     return TRUE;
1311 }
1312
1313 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1314 #if wxUSE_CTL3D
1315                                WXUINT message,
1316                                WXWPARAM wParam,
1317                                WXLPARAM lParam
1318 #else
1319                                WXUINT WXUNUSED(message),
1320                                WXWPARAM WXUNUSED(wParam),
1321                                WXLPARAM WXUNUSED(lParam)
1322 #endif
1323     )
1324 {
1325 #if wxUSE_CTL3D
1326     if ( m_useCtl3D )
1327     {
1328         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1329         return (WXHBRUSH) hbrush;
1330     }
1331 #endif // wxUSE_CTL3D
1332
1333     HDC hdc = (HDC)pDC;
1334     if (GetParent()->GetTransparentBackground())
1335         SetBkMode(hdc, TRANSPARENT);
1336     else
1337         SetBkMode(hdc, OPAQUE);
1338
1339     wxColour colBack = GetBackgroundColour();
1340
1341     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1342         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1343
1344     ::SetBkColor(hdc, wxColourToRGB(colBack));
1345     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1346
1347     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1348
1349     return (WXHBRUSH)brush->GetResourceHandle();
1350 }
1351
1352 // In WIN16, need to override normal erasing because
1353 // Ctl3D doesn't use the wxWindows background colour.
1354 #ifdef __WIN16__
1355 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1356 {
1357     wxColour col(m_backgroundColour);
1358
1359 #if wxUSE_CTL3D
1360     if (m_useCtl3D)
1361         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1362 #endif
1363
1364     RECT rect;
1365     ::GetClientRect(GetHwnd(), &rect);
1366
1367     COLORREF ref = wxColourToRGB(col);
1368     HBRUSH hBrush = ::CreateSolidBrush(ref);
1369     if ( !hBrush )
1370         wxLogLastError(wxT("CreateSolidBrush"));
1371
1372     HDC hdc = (HDC)event.GetDC()->GetHDC();
1373
1374     int mode = ::SetMapMode(hdc, MM_TEXT);
1375
1376     ::FillRect(hdc, &rect, hBrush);
1377     ::DeleteObject(hBrush);
1378     ::SetMapMode(hdc, mode);
1379
1380 }
1381 #endif // Win16
1382
1383 bool wxTextCtrl::AdjustSpaceLimit()
1384 {
1385 #ifndef __WIN16__
1386     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1387
1388     // HACK: we try to automatically extend the limit for the amount of text
1389     //       to allow (interactively) entering more than 64Kb of text under
1390     //       Win9x but we shouldn't reset the text limit which was previously
1391     //       set explicitly with SetMaxLength()
1392     //
1393     //       we could solve this by storing the limit we set in wxTextCtrl but
1394     //       to save space we prefer to simply test here the actual limit
1395     //       value: we consider that SetMaxLength() can only be called for
1396     //       values < 32Kb
1397     if ( limit < 0x8000 )
1398     {
1399         // we've got more text than limit set by SetMaxLength()
1400         return FALSE;
1401     }
1402
1403     unsigned int len = ::GetWindowTextLength(GetHwnd());
1404     if ( len >= limit )
1405     {
1406         limit = len + 0x8000;    // 32Kb
1407
1408 #if wxUSE_RICHEDIT
1409         if ( IsRich() )
1410         {
1411             // as a nice side effect, this also allows passing limit > 64Kb
1412             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1413         }
1414         else
1415 #endif // wxUSE_RICHEDIT
1416         {
1417             if ( limit > 0xffff )
1418             {
1419                 // this will set it to a platform-dependent maximum (much more
1420                 // than 64Kb under NT)
1421                 limit = 0;
1422             }
1423
1424             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1425         }
1426     }
1427 #endif // !Win16
1428
1429     // we changed the limit
1430     return TRUE;
1431 }
1432
1433 bool wxTextCtrl::AcceptsFocus() const
1434 {
1435     // we don't want focus if we can't be edited
1436     return IsEditable() && wxControl::AcceptsFocus();
1437 }
1438
1439 wxSize wxTextCtrl::DoGetBestSize() const
1440 {
1441     int cx, cy;
1442     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1443
1444     int wText = DEFAULT_ITEM_WIDTH;
1445
1446     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1447     if ( m_windowStyle & wxTE_MULTILINE )
1448     {
1449         hText *= wxMax(GetNumberOfLines(), 5);
1450     }
1451     //else: for single line control everything is ok
1452
1453     return wxSize(wText, hText);
1454 }
1455
1456 // ----------------------------------------------------------------------------
1457 // standard handlers for standard edit menu events
1458 // ----------------------------------------------------------------------------
1459
1460 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1461 {
1462     Cut();
1463 }
1464
1465 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1466 {
1467     Copy();
1468 }
1469
1470 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1471 {
1472     Paste();
1473 }
1474
1475 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1476 {
1477     Undo();
1478 }
1479
1480 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1481 {
1482     Redo();
1483 }
1484
1485 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1486 {
1487     event.Enable( CanCut() );
1488 }
1489
1490 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1491 {
1492     event.Enable( CanCopy() );
1493 }
1494
1495 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1496 {
1497     event.Enable( CanPaste() );
1498 }
1499
1500 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1501 {
1502     event.Enable( CanUndo() );
1503 }
1504
1505 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1506 {
1507     event.Enable( CanRedo() );
1508 }
1509
1510 // the rest of the file only deals with the rich edit controls
1511 #if wxUSE_RICHEDIT
1512
1513 // ----------------------------------------------------------------------------
1514 // EN_LINK processing
1515 // ----------------------------------------------------------------------------
1516
1517 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1518 {
1519     NMHDR *hdr = (NMHDR* )lParam;
1520     switch ( hdr->code )
1521     {
1522         case EN_MSGFILTER:
1523             {
1524                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
1525                 UINT msg = msgf->msg;
1526
1527                 // this is a bit crazy but richedit 1.0 sends us all mouse
1528                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
1529                 // generate the wxWin events for this message manually
1530                 //
1531                 // NB: in fact, this is still not totally correct as it does
1532                 //     send us WM_LBUTTONUP if the selection was cleared by the
1533                 //     last click -- so currently we get 2 events in this case,
1534                 //     but as I don't see any obvious way to check for this I
1535                 //     leave this code in place because it's still better than
1536                 //     not getting left up events at all
1537                 if ( msg == WM_LBUTTONUP )
1538                 {
1539                     WXUINT flags = msgf->wParam;
1540                     int x = GET_X_LPARAM(msgf->lParam),
1541                         y = GET_Y_LPARAM(msgf->lParam);
1542
1543                     HandleMouseEvent(msg, x, y, flags);
1544                 }
1545             }
1546
1547             // return TRUE to process the event (and FALSE to ignore it)
1548             return TRUE;
1549
1550         case EN_LINK:
1551             {
1552                 const ENLINK *enlink = (ENLINK *)hdr;
1553
1554                 switch ( enlink->msg )
1555                 {
1556                     case WM_SETCURSOR:
1557                         // ok, so it is hardcoded - do we really nee to
1558                         // customize it?
1559                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1560                         *result = TRUE;
1561                         break;
1562
1563                     case WM_MOUSEMOVE:
1564                     case WM_LBUTTONDOWN:
1565                     case WM_LBUTTONUP:
1566                     case WM_LBUTTONDBLCLK:
1567                     case WM_RBUTTONDOWN:
1568                     case WM_RBUTTONUP:
1569                     case WM_RBUTTONDBLCLK:
1570                         // send a mouse event
1571                         {
1572                             static const wxEventType eventsMouse[] =
1573                             {
1574                                 wxEVT_MOTION,
1575                                 wxEVT_LEFT_DOWN,
1576                                 wxEVT_LEFT_UP,
1577                                 wxEVT_LEFT_DCLICK,
1578                                 wxEVT_RIGHT_DOWN,
1579                                 wxEVT_RIGHT_UP,
1580                                 wxEVT_RIGHT_DCLICK,
1581                             };
1582
1583                             // the event ids are consecutive
1584                             wxMouseEvent
1585                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1586
1587                             InitMouseEvent(evtMouse,
1588                                            GET_X_LPARAM(enlink->lParam),
1589                                            GET_Y_LPARAM(enlink->lParam),
1590                                            enlink->wParam);
1591
1592                             wxTextUrlEvent event(m_windowId, evtMouse,
1593                                                  enlink->chrg.cpMin,
1594                                                  enlink->chrg.cpMax);
1595
1596                             InitCommandEvent(event);
1597
1598                             *result = ProcessCommand(event);
1599                         }
1600                         break;
1601                 }
1602             }
1603             return TRUE;
1604     }
1605
1606     // not processed, leave it to the base class
1607     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
1608 }
1609
1610 // ----------------------------------------------------------------------------
1611 // colour setting for the rich edit controls
1612 // ----------------------------------------------------------------------------
1613
1614 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1615 {
1616     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1617     {
1618         // colour didn't really change
1619         return FALSE;
1620     }
1621
1622     if ( IsRich() )
1623     {
1624         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1625         // EM_SETBKGNDCOLOR additionally
1626         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1627     }
1628
1629     return TRUE;
1630 }
1631
1632 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1633 {
1634     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1635     {
1636         // colour didn't really change
1637         return FALSE;
1638     }
1639
1640     if ( IsRich() )
1641     {
1642         // change the colour of everything
1643         CHARFORMAT cf;
1644         wxZeroMemory(cf);
1645         cf.cbSize = sizeof(cf);
1646         cf.dwMask = CFM_COLOR;
1647         cf.crTextColor = wxColourToRGB(colour);
1648         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1649     }
1650
1651     return TRUE;
1652 }
1653
1654 // ----------------------------------------------------------------------------
1655 // styling support for rich edit controls
1656 // ----------------------------------------------------------------------------
1657
1658 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1659 {
1660     if ( !IsRich() )
1661     {
1662         // can't do it with normal text control
1663         return FALSE;
1664     }
1665
1666     // the richedit 1.0 doesn't handle setting background colour, so don't
1667     // even try to do anything if it's the only thing we want to change
1668     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() )
1669     {
1670         // nothing to do: return TRUE if there was really nothing to do and
1671         // FALSE if we failed to set bg colour
1672         return !style.HasBackgroundColour();
1673     }
1674
1675     // order the range if needed
1676     if ( start > end )
1677     {
1678         long tmp = start;
1679         start = end;
1680         end = tmp;
1681     }
1682
1683     // we can only change the format of the selection, so select the range we
1684     // want and restore the old selection later
1685     long startOld, endOld;
1686     GetSelection(&startOld, &endOld);
1687
1688     // but do we really have to change the selection?
1689     bool changeSel = start != startOld || end != endOld;
1690
1691     if ( changeSel )
1692     {
1693         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
1694     }
1695
1696     // initialize CHARFORMAT struct
1697 #if wxUSE_RICHEDIT2
1698     CHARFORMAT2 cf;
1699 #else
1700     CHARFORMAT cf;
1701 #endif
1702
1703     wxZeroMemory(cf);
1704
1705     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
1706     // CHARFORMAT in that case
1707 #if wxUSE_RICHEDIT2
1708     if ( m_verRichEdit == 1 )
1709     {
1710         // this is the only thing the control is going to grok
1711         cf.cbSize = sizeof(CHARFORMAT);
1712     }
1713     else
1714 #endif
1715     {
1716         // CHARFORMAT or CHARFORMAT2
1717         cf.cbSize = sizeof(cf);
1718     }
1719
1720     if ( style.HasFont() )
1721     {
1722         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1723         //     but using it doesn't seem to hurt neither so leaving it for now
1724
1725         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1726                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1727
1728         // fill in data from LOGFONT but recalculate lfHeight because we need
1729         // the real height in twips and not the negative number which
1730         // wxFillLogFont() returns (this is correct in general and works with
1731         // the Windows font mapper, but not here)
1732         LOGFONT lf;
1733         wxFillLogFont(&lf, &style.GetFont());
1734         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1735         cf.bCharSet = lf.lfCharSet;
1736         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1737         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1738
1739         // also deal with underline/italic/bold attributes: note that we must
1740         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1741         // style to allow clearing it
1742         if ( lf.lfItalic )
1743         {
1744             cf.dwEffects |= CFE_ITALIC;
1745         }
1746
1747         if ( lf.lfWeight == FW_BOLD )
1748         {
1749             cf.dwEffects |= CFE_BOLD;
1750         }
1751
1752         if ( lf.lfUnderline )
1753         {
1754             cf.dwEffects |= CFE_UNDERLINE;
1755         }
1756
1757         // strikeout fonts are not supported by wxWindows
1758     }
1759
1760     if ( style.HasTextColour() )
1761     {
1762         cf.dwMask |= CFM_COLOR;
1763         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1764     }
1765
1766 #if wxUSE_RICHEDIT2
1767     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
1768     {
1769         cf.dwMask |= CFM_BACKCOLOR;
1770         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1771     }
1772 #endif // wxUSE_RICHEDIT2
1773
1774     // do format the selection
1775     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1776                             SCF_SELECTION, (LPARAM)&cf) != 0;
1777     if ( !ok )
1778     {
1779         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1780     }
1781
1782     if ( changeSel )
1783     {
1784         // restore the original selection
1785         DoSetSelection(startOld, endOld, FALSE);
1786     }
1787
1788     return ok;
1789 }
1790
1791 // ----------------------------------------------------------------------------
1792 // wxRichEditModule
1793 // ----------------------------------------------------------------------------
1794
1795 bool wxRichEditModule::OnInit()
1796 {
1797     // don't do anything - we will load it when needed
1798     return TRUE;
1799 }
1800
1801 void wxRichEditModule::OnExit()
1802 {
1803     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
1804     {
1805         if ( ms_hRichEdit[i] )
1806         {
1807             ::FreeLibrary(ms_hRichEdit[i]);
1808         }
1809     }
1810 }
1811
1812 /* static */
1813 bool wxRichEditModule::Load(int version)
1814 {
1815     // we don't support loading richedit 3.0 as I don't know how to distinguish
1816     // it from 2.0 anyhow
1817     wxCHECK_MSG( version == 1 || version == 2, FALSE,
1818                  _T("incorrect richedit control version requested") );
1819
1820     // make it the index in the array
1821     version--;
1822
1823     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
1824     {
1825         // we had already tried to load it and failed
1826         return FALSE;
1827     }
1828
1829     if ( ms_hRichEdit[version] )
1830     {
1831         // we've already got this one
1832         return TRUE;
1833     }
1834
1835     wxString dllname = version ? _T("riched20") : _T("riched32");
1836     dllname += _T(".dll");
1837
1838     ms_hRichEdit[version] = ::LoadLibrary(dllname);
1839
1840     if ( !ms_hRichEdit[version] )
1841     {
1842         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1843
1844         ms_hRichEdit[version] = (HINSTANCE)-1;
1845
1846         return FALSE;
1847     }
1848
1849     return TRUE;
1850 }
1851
1852 #endif // wxUSE_RICHEDIT
1853
1854 #endif // wxUSE_TEXTCTRL