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
 181     m_suppressNextUpdate = FALSE;
 182 #endif // wxUSE_RICHEDIT
 183 }
 184
 185 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 186                         const wxString& value,
 187                         const wxPoint& pos,
 188                         const wxSize& size,
 189                         long style,
 190                         const wxValidator& validator,
 191                         const wxString& name)
 192 {
 193     // base initialization
 194     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 195         return FALSE;
 196
 197     if ( parent )
 198         parent->AddChild(this);
 199
 200     // translate wxWin style flags to MSW ones
 201     WXDWORD msStyle = MSWGetCreateWindowFlags();
 202
 203     // do create the control - either an EDIT or RICHEDIT
 204     wxString windowClass = wxT("EDIT");
 205
 206 #if wxUSE_RICHEDIT
 207     if ( m_windowStyle & wxTE_AUTO_URL )
 208     {
 209         // automatic URL detection only works in RichEdit 2.0+
 210         m_windowStyle |= wxTE_RICH2;
 211     }
 212
 213     if ( m_windowStyle & wxTE_RICH2 )
 214     {
 215         // using richedit 2.0 implies using wxTE_RICH
 216         m_windowStyle |= wxTE_RICH;
 217     }
 218
 219     // we need to load the richedit DLL before creating the rich edit control
 220     if ( m_windowStyle & wxTE_RICH )
 221     {
 222         static bool s_errorGiven = FALSE;// MT-FIXME
 223
 224         // Which version do we need? Use 1.0 by default because it is much more
 225         // like the the standard EDIT or 2.0 if explicitly requested, but use
 226         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 227         //
 228         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 229         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 230         //       should use 3.0 if available as it is the best of both worlds -
 231         //       but as I can't test it right now I don't do it (VZ)
 232 #if wxUSE_UNICODE
 233         const int verRichEdit = 2;
 234 #else // !wxUSE_UNICODE
 235         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 236 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 237
 238         // only give the error msg once if the DLL can't be loaded
 239         if ( !s_errorGiven )
 240         {
 241             // try to load the RichEdit DLL (will do nothing if already done)
 242             if ( !wxRichEditModule::Load(verRichEdit) )
 243             {
 244 #if !wxUSE_UNICODE
 245                 // try another version?
 246                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 247
 248                 if ( !wxRichEditModule::Load(verRichEdit) )
 249 #endif // wxUSE_UNICODE
 250                 {
 251                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 252
 253                     s_errorGiven = TRUE;
 254                 }
 255             }
 256         }
 257
 258         // have we managed to load any richedit version?
 259         if ( !s_errorGiven )
 260         {
 261             msStyle |= ES_AUTOVSCROLL;
 262
 263             m_verRichEdit = verRichEdit;
 264             if ( m_verRichEdit == 1 )
 265             {
 266                 windowClass = wxT("RICHEDIT");
 267             }
 268             else
 269             {
 270 #ifndef RICHEDIT_CLASS
 271                 wxString RICHEDIT_CLASS;
 272                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 273 #if wxUSE_UNICODE
 274                 RICHEDIT_CLASS += _T('W');
 275 #else // ANSI
 276                 RICHEDIT_CLASS += _T('A');
 277 #endif // Unicode/ANSI
 278 #endif // !RICHEDIT_CLASS
 279
 280                 windowClass = RICHEDIT_CLASS;
 281             }
 282         }
 283     }
 284 #endif // wxUSE_RICHEDIT
 285
 286     // we need to turn '\n's into "\r\n"s for the multiline controls
 287     wxString valueWin;
 288     if ( m_windowStyle & wxTE_MULTILINE )
 289     {
 290         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 291     }
 292     else // single line
 293     {
 294         valueWin = value;
 295     }
 296
 297     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 298         return FALSE;
 299
 300     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 301
 302 #if wxUSE_RICHEDIT
 303     if ( IsRich() )
 304     {
 305         // enable the events we're interested in: we want to get EN_CHANGE as
 306         // for the normal controls
 307         LPARAM mask = ENM_CHANGE;
 308
 309         if ( GetRichVersion() == 1 )
 310         {
 311             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 312             // explained in its handler
 313            mask |= ENM_MOUSEEVENTS;
 314         }
 315         else if ( m_windowStyle & wxTE_AUTO_URL )
 316         {
 317             mask |= ENM_LINK;
 318
 319             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 320         }
 321
 322         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 323     }
 324 #endif // wxUSE_RICHEDIT
 325
 326     return TRUE;
 327 }
 328
 329 // Make sure the window style (etc.) reflects the HWND style (roughly)
 330 void wxTextCtrl::AdoptAttributesFromHWND()
 331 {
 332     wxWindow::AdoptAttributesFromHWND();
 333
 334     HWND hWnd = GetHwnd();
 335     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 336
 337     // retrieve the style to see whether this is an edit or richedit ctrl
 338 #if wxUSE_RICHEDIT
 339     wxString classname = wxGetWindowClass(GetHWND());
 340
 341     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 342     {
 343         m_verRichEdit = 0;
 344     }
 345     else // rich edit?
 346     {
 347         wxChar c;
 348         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 349         {
 350             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 351
 352             m_verRichEdit = 0;
 353         }
 354     }
 355 #endif // wxUSE_RICHEDIT
 356
 357     if (style & ES_MULTILINE)
 358         m_windowStyle |= wxTE_MULTILINE;
 359     if (style & ES_PASSWORD)
 360         m_windowStyle |= wxTE_PASSWORD;
 361     if (style & ES_READONLY)
 362         m_windowStyle |= wxTE_READONLY;
 363     if (style & ES_WANTRETURN)
 364         m_windowStyle |= wxTE_PROCESS_ENTER;
 365 }
 366
 367 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 368 {
 369     // default border for the text controls is the sunken one
 370     if ( (style & wxBORDER_MASK) == wxBORDER_DEFAULT )
 371     {
 372         style |= wxBORDER_SUNKEN;
 373     }
 374
 375     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 376
 377     // default styles
 378     msStyle |= ES_LEFT;
 379
 380     if ( style & wxTE_MULTILINE )
 381     {
 382         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 383                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 384
 385         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 386         if ( !(style & wxTE_NO_VSCROLL) )
 387             msStyle |= WS_VSCROLL;
 388
 389         style |= wxTE_PROCESS_ENTER;
 390     }
 391     else // !multiline
 392     {
 393         // there is really no reason to not have this style for single line
 394         // text controls
 395         msStyle |= ES_AUTOHSCROLL;
 396     }
 397
 398     if ( style & wxHSCROLL )
 399         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 400
 401     if ( style & wxTE_READONLY )
 402         msStyle |= ES_READONLY;
 403
 404     if ( style & wxTE_PASSWORD )
 405         msStyle |= ES_PASSWORD;
 406
 407     if ( style & wxTE_AUTO_SCROLL )
 408         msStyle |= ES_AUTOHSCROLL;
 409
 410     if ( style & wxTE_NOHIDESEL )
 411         msStyle |= ES_NOHIDESEL;
 412
 413     return msStyle;
 414 }
 415
 416 void wxTextCtrl::SetWindowStyleFlag(long style)
 417 {
 418 #if wxUSE_RICHEDIT
 419     // we have to deal with some styles separately because they can't be
 420     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 421     // using richedit-specific EM_SETOPTIONS
 422     if ( IsRich() &&
 423             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 424     {
 425         bool set = (style & wxTE_NOHIDESEL) != 0;
 426
 427         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 428                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 429     }
 430 #endif // wxUSE_RICHEDIT
 431
 432     wxControl::SetWindowStyleFlag(style);
 433 }
 434
 435 // ----------------------------------------------------------------------------
 436 // set/get the controls text
 437 // ----------------------------------------------------------------------------
 438
 439 wxString wxTextCtrl::GetValue() const
 440 {
 441     // range 0..-1 is special for GetRange() and means to retrieve all text
 442     return GetRange(0, -1);
 443 }
 444
 445 wxString wxTextCtrl::GetRange(long from, long to) const
 446 {
 447     wxString str;
 448
 449     if ( from >= to && to != -1 )
 450     {
 451         // nothing to retrieve
 452         return str;
 453     }
 454
 455 #if wxUSE_RICHEDIT
 456     if ( IsRich() )
 457     {
 458         int len = GetWindowTextLength(GetHwnd());
 459         if ( len > from )
 460         {
 461             // alloc one extra WORD as needed by the control
 462             wxChar *p = str.GetWriteBuf(++len);
 463
 464             TEXTRANGE textRange;
 465             textRange.chrg.cpMin = from;
 466             textRange.chrg.cpMax = to == -1 ? len : to;
 467             textRange.lpstrText = p;
 468
 469             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 470
 471             if ( m_verRichEdit > 1 )
 472             {
 473                 // RichEdit 2.0 uses just CR ('\r') for the newlines which is
 474                 // neither Unix nor Windows style - convert it to something
 475                 // reasonable
 476                 for ( ; *p; p++ )
 477                 {
 478                     if ( *p == _T('\r') )
 479                         *p = _T('\n');
 480                 }
 481             }
 482
 483             str.UngetWriteBuf();
 484
 485             if ( m_verRichEdit == 1 )
 486             {
 487                 // convert to the canonical form - see comment below
 488                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 489             }
 490         }
 491         //else: no text at all, leave the string empty
 492     }
 493     else
 494 #endif // wxUSE_RICHEDIT
 495     {
 496         // retrieve all text
 497         str = wxGetWindowText(GetHWND());
 498
 499         // need only a range?
 500         if ( from < to )
 501         {
 502             str = str.Mid(from, to - from);
 503         }
 504
 505         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 506         // canonical one (same one as above) for consistency with the other kinds
 507         // of controls and, more importantly, with the other ports
 508         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 509     }
 510
 511     return str;
 512 }
 513
 514 void wxTextCtrl::SetValue(const wxString& value)
 515 {
 516     // if the text is long enough, it's faster to just set it instead of first
 517     // comparing it with the old one (chances are that it will be different
 518     // anyhow, this comparison is there to avoid flicker for small single-line
 519     // edit controls mostly)
 520     if ( (value.length() > 0x400) || (value != GetValue()) )
 521     {
 522         DoWriteText(value, FALSE /* not selection only */);
 523
 524         // mark the control as being not dirty - we changed its text, not the
 525         // user
 526         DiscardEdits();
 527
 528         // for compatibility, don't move the cursor when doing SetValue()
 529         SetInsertionPoint(0);
 530     }
 531 }
 532
 533 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 534
 535 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 536 {
 537     *pcb = 0;
 538
 539     wchar_t *wbuf = (wchar_t *)buf;
 540     const wchar_t *wpc = *(const wchar_t **)dwCookie;
 541     while ( cb && *wpc )
 542     {
 543         *wbuf++ = *wpc++;
 544
 545         cb -= sizeof(wchar_t);
 546         (*pcb) += sizeof(wchar_t);
 547     }
 548
 549     *(const wchar_t **)dwCookie = wpc;
 550
 551     return 0;
 552 }
 553
 554 extern long wxEncodingToCodepage(wxFontEncoding encoding); // from utils.cpp
 555
 556 #ifdef __WXWINE__
 557 bool wxTextCtrl::StreamIn(const wxString& value,
 558                           wxFontEncoding WXUNUSED(encoding),
 559                           bool selectionOnly)
 560 {
 561     return FALSE;
 562 }
 563 #else
 564
 565 #if wxUSE_UNICODE_MSLU
 566 bool wxTextCtrl::StreamIn(const wxString& value,
 567                           wxFontEncoding WXUNUSED(encoding),
 568                           bool selectionOnly)
 569 {
 570     const wchar_t *wpc = value.c_str();
 571 #else // !wxUSE_UNICODE_MSLU
 572 bool wxTextCtrl::StreamIn(const wxString& value,
 573                           wxFontEncoding encoding,
 574                           bool selectionOnly)
 575 {
 576     // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
 577     // text in the non default charset - otherwise it thinks it knows better
 578     // than we do and always shows it in the default one
 579
 580     // first get the Windows code page for this encoding
 581     long codepage = wxEncodingToCodepage(encoding);
 582     if ( codepage == -1 )
 583     {
 584         // unknown encoding
 585         return FALSE;
 586     }
 587
 588     // next translate to Unicode using this code page
 589     int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
 590
 591 #if wxUSE_WCHAR_T
 592     wxWCharBuffer wchBuf(len);
 593 #else
 594     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 595 #endif
 596
 597     if ( !::MultiByteToWideChar(codepage, 0, value, -1,
 598                                 (wchar_t *)(const wchar_t *)wchBuf, len) )
 599     {
 600         wxLogLastError(_T("MultiByteToWideChar"));
 601     }
 602
 603     // finally, stream it in the control
 604     const wchar_t *wpc = wchBuf;
 605 #endif // wxUSE_UNICODE_MSLU
 606
 607     EDITSTREAM eds;
 608     wxZeroMemory(eds);
 609     eds.dwCookie = (DWORD)&wpc;
 610     // the cast below is needed for broken (very) old mingw32 headers
 611     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 612
 613     if ( !::SendMessage(GetHwnd(), EM_STREAMIN,
 614                         SF_TEXT |
 615                         SF_UNICODE |
 616                         (selectionOnly ? SFF_SELECTION : 0),
 617                         (LPARAM)&eds) || eds.dwError )
 618     {
 619         wxLogLastError(_T("EM_STREAMIN"));
 620     }
 621
 622 #if !wxUSE_WCHAR_T
 623     free(wchBuf);
 624 #endif // !wxUSE_WCHAR_T
 625
 626     return TRUE;
 627 }
 628
 629 #endif
 630     // __WXWINE__
 631
 632 #endif // wxUSE_RICHEDIT
 633
 634 void wxTextCtrl::WriteText(const wxString& value)
 635 {
 636     DoWriteText(value);
 637 }
 638
 639 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 640 {
 641     wxString valueDos;
 642     if ( m_windowStyle & wxTE_MULTILINE )
 643         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 644     else
 645         valueDos = value;
 646
 647 #if wxUSE_RICHEDIT
 648     // there are several complications with the rich edit controls here
 649     bool done = FALSE;
 650     if ( IsRich() )
 651     {
 652         // first, ensure that the new text will be in the default style
 653         if ( !m_defaultStyle.IsDefault() )
 654         {
 655             long start, end;
 656             GetSelection(&start, &end);
 657             SetStyle(start, end, m_defaultStyle);
 658         }
 659
 660 #if wxUSE_UNICODE_MSLU
 661         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 662         // but EM_STREAMIN works
 663         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 664         {
 665            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 666         }
 667 #endif // wxUSE_UNICODE_MSLU
 668
 669 #if !wxUSE_UNICODE && !defined(__WXWINE__)
 670         // next check if the text we're inserting must be shown in a non
 671         // default charset -- this only works for RichEdit > 1.0
 672         if ( GetRichVersion() > 1 )
 673         {
 674             wxFont font = m_defaultStyle.GetFont();
 675             if ( !font.Ok() )
 676                 font = GetFont();
 677
 678             if ( font.Ok() )
 679             {
 680                wxFontEncoding encoding = font.GetEncoding();
 681                if ( encoding != wxFONTENCODING_SYSTEM )
 682                {
 683                    done = StreamIn(valueDos, encoding, selectionOnly);
 684                }
 685             }
 686         }
 687 #endif // !wxUSE_UNICODE
 688     }
 689
 690     if ( !done )
 691 #endif // wxUSE_RICHEDIT
 692     {
 693 #if wxUSE_RICHEDIT
 694         // rich edit text control sends us 2 EN_CHANGE events when we send
 695         // WM_SETTEXT to it, we have to suppress one of them to make wxTextCtrl
 696         // behaviour consistent
 697         if ( IsRich() )
 698         {
 699             m_suppressNextUpdate = TRUE;
 700         }
 701 #endif // wxUSE_RICHEDIT
 702
 703         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 704                       0, (LPARAM)valueDos.c_str());
 705     }
 706
 707     AdjustSpaceLimit();
 708 }
 709
 710 void wxTextCtrl::AppendText(const wxString& text)
 711 {
 712     SetInsertionPointEnd();
 713
 714     WriteText(text);
 715 }
 716
 717 void wxTextCtrl::Clear()
 718 {
 719     ::SetWindowText(GetHwnd(), wxT(""));
 720
 721 #if wxUSE_RICHEDIT
 722     if ( !IsRich() )
 723 #endif // wxUSE_RICHEDIT
 724     {
 725         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 726         // but the normal ones don't -- make Clear() behaviour consistent by
 727         // always sending this event
 728         SendUpdateEvent();
 729     }
 730 }
 731
 732 #ifdef __WIN32__
 733
 734 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 735 {
 736     SetFocus();
 737
 738     size_t lenOld = GetValue().length();
 739
 740     wxUint32 code = event.GetRawKeyCode();
 741     ::keybd_event(code, 0, 0 /* key press */, 0);
 742     ::keybd_event(code, 0, KEYEVENTF_KEYUP, 0);
 743
 744     // assume that any alphanumeric key changes the total number of characters
 745     // in the control - this should work in 99% of cases
 746     return GetValue().length() != lenOld;
 747 }
 748
 749 #endif // __WIN32__
 750
 751 // ----------------------------------------------------------------------------
 752 // Clipboard operations
 753 // ----------------------------------------------------------------------------
 754
 755 void wxTextCtrl::Copy()
 756 {
 757     if (CanCopy())
 758     {
 759         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
 760     }
 761 }
 762
 763 void wxTextCtrl::Cut()
 764 {
 765     if (CanCut())
 766     {
 767         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
 768     }
 769 }
 770
 771 void wxTextCtrl::Paste()
 772 {
 773     if (CanPaste())
 774     {
 775         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
 776     }
 777 }
 778
 779 bool wxTextCtrl::CanCopy() const
 780 {
 781     // Can copy if there's a selection
 782     long from, to;
 783     GetSelection(&from, &to);
 784     return from != to;
 785 }
 786
 787 bool wxTextCtrl::CanCut() const
 788 {
 789     return CanCopy() && IsEditable();
 790 }
 791
 792 bool wxTextCtrl::CanPaste() const
 793 {
 794     if ( !IsEditable() )
 795         return FALSE;
 796
 797 #if wxUSE_RICHEDIT
 798     if ( IsRich() )
 799     {
 800         UINT cf = 0; // 0 == any format
 801
 802         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 803     }
 804 #endif // wxUSE_RICHEDIT
 805
 806     // Standard edit control: check for straight text on clipboard
 807     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 808         return FALSE;
 809
 810     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 811     ::CloseClipboard();
 812
 813     return isTextAvailable;
 814 }
 815
 816 // ----------------------------------------------------------------------------
 817 // Accessors
 818 // ----------------------------------------------------------------------------
 819
 820 void wxTextCtrl::SetEditable(bool editable)
 821 {
 822     HWND hWnd = GetHwnd();
 823     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 824 }
 825
 826 void wxTextCtrl::SetInsertionPoint(long pos)
 827 {
 828     DoSetSelection(pos, pos);
 829 }
 830
 831 void wxTextCtrl::SetInsertionPointEnd()
 832 {
 833     long pos;
 834
 835 #if wxUSE_RICHEDIT
 836     if ( m_verRichEdit == 1 )
 837     {
 838         // we don't have to waste time calling GetLastPosition() in this case
 839         pos = -1;
 840     }
 841     else // !RichEdit 1.0
 842 #endif // wxUSE_RICHEDIT
 843     {
 844         pos = GetLastPosition();
 845     }
 846
 847     SetInsertionPoint(pos);
 848 }
 849
 850 long wxTextCtrl::GetInsertionPoint() const
 851 {
 852 #if wxUSE_RICHEDIT
 853     if ( IsRich() )
 854     {
 855         CHARRANGE range;
 856         range.cpMin = 0;
 857         range.cpMax = 0;
 858         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 859         return range.cpMin;
 860     }
 861 #endif // wxUSE_RICHEDIT
 862
 863     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 864     return Pos & 0xFFFF;
 865 }
 866
 867 long wxTextCtrl::GetLastPosition() const
 868 {
 869     int numLines = GetNumberOfLines();
 870     long posStartLastLine = XYToPosition(0, numLines - 1);
 871
 872     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
 873
 874     return posStartLastLine + lenLastLine;
 875 }
 876
 877 // If the return values from and to are the same, there is no
 878 // selection.
 879 void wxTextCtrl::GetSelection(long* from, long* to) const
 880 {
 881 #if wxUSE_RICHEDIT
 882     if ( IsRich() )
 883     {
 884         CHARRANGE charRange;
 885         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 886
 887         *from = charRange.cpMin;
 888         *to = charRange.cpMax;
 889     }
 890     else
 891 #endif // !wxUSE_RICHEDIT
 892     {
 893         DWORD dwStart, dwEnd;
 894         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 895
 896         *from = dwStart;
 897         *to = dwEnd;
 898     }
 899 }
 900
 901 bool wxTextCtrl::IsEditable() const
 902 {
 903     // strangely enough, we may be called before the control is created: our
 904     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
 905     // us
 906     if ( !m_hWnd )
 907         return TRUE;
 908
 909     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 910
 911     return (style & ES_READONLY) == 0;
 912 }
 913
 914 // ----------------------------------------------------------------------------
 915 // selection
 916 // ----------------------------------------------------------------------------
 917
 918 void wxTextCtrl::SetSelection(long from, long to)
 919 {
 920     // if from and to are both -1, it means (in wxWindows) that all text should
 921     // be selected - translate into Windows convention
 922     if ( (from == -1) && (to == -1) )
 923     {
 924         from = 0;
 925         to = -1;
 926     }
 927
 928     DoSetSelection(from, to);
 929 }
 930
 931 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 932 {
 933     HWND hWnd = GetHwnd();
 934
 935 #ifdef __WIN32__
 936 #if wxUSE_RICHEDIT
 937     if ( IsRich() )
 938     {
 939         CHARRANGE range;
 940         range.cpMin = from;
 941         range.cpMax = to;
 942         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 943     }
 944     else
 945 #endif // wxUSE_RICHEDIT
 946     {
 947         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
 948     }
 949
 950     if ( scrollCaret )
 951     {
 952         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 953     }
 954 #else // Win16
 955     // WPARAM is 0: selection is scrolled into view
 956     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
 957 #endif // Win32/16
 958 }
 959
 960 // ----------------------------------------------------------------------------
 961 // Editing
 962 // ----------------------------------------------------------------------------
 963
 964 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 965 {
 966     // Set selection and remove it
 967     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
 968
 969     SendMessage(GetHwnd(), EM_REPLACESEL,
 970 #ifdef __WIN32__
 971                 TRUE,
 972 #else
 973                 FALSE,
 974 #endif
 975                 (LPARAM)value.c_str());
 976 }
 977
 978 void wxTextCtrl::Remove(long from, long to)
 979 {
 980     Replace(from, to, _T(""));
 981 }
 982
 983 bool wxTextCtrl::LoadFile(const wxString& file)
 984 {
 985     if ( wxTextCtrlBase::LoadFile(file) )
 986     {
 987         // update the size limit if needed
 988         AdjustSpaceLimit();
 989
 990         return TRUE;
 991     }
 992
 993     return FALSE;
 994 }
 995
 996 bool wxTextCtrl::IsModified() const
 997 {
 998     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
 999 }
1000
1001 // Makes 'unmodified'
1002 void wxTextCtrl::DiscardEdits()
1003 {
1004     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1005 }
1006
1007 int wxTextCtrl::GetNumberOfLines() const
1008 {
1009     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1010 }
1011
1012 long wxTextCtrl::XYToPosition(long x, long y) const
1013 {
1014     // This gets the char index for the _beginning_ of this line
1015     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1016
1017     return charIndex + x;
1018 }
1019
1020 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1021 {
1022     HWND hWnd = GetHwnd();
1023
1024     // This gets the line number containing the character
1025     long lineNo;
1026 #if wxUSE_RICHEDIT
1027     if ( IsRich() )
1028     {
1029         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1030     }
1031     else
1032 #endif // wxUSE_RICHEDIT
1033     {
1034         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1035     }
1036
1037     if ( lineNo == -1 )
1038     {
1039         // no such line
1040         return FALSE;
1041     }
1042
1043     // This gets the char index for the _beginning_ of this line
1044     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1045     if ( charIndex == -1 )
1046     {
1047         return FALSE;
1048     }
1049
1050     // The X position must therefore be the different between pos and charIndex
1051     if ( x )
1052         *x = pos - charIndex;
1053     if ( y )
1054         *y = lineNo;
1055
1056     return TRUE;
1057 }
1058
1059 void wxTextCtrl::ShowPosition(long pos)
1060 {
1061     HWND hWnd = GetHwnd();
1062
1063     // To scroll to a position, we pass the number of lines and characters
1064     // to scroll *by*. This means that we need to:
1065     // (1) Find the line position of the current line.
1066     // (2) Find the line position of pos.
1067     // (3) Scroll by (pos - current).
1068     // For now, ignore the horizontal scrolling.
1069
1070     // Is this where scrolling is relative to - the line containing the caret?
1071     // Or is the first visible line??? Try first visible line.
1072 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1073
1074     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1075
1076     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1077
1078     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1079
1080     if (linesToScroll != 0)
1081       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1082 }
1083
1084 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1085 {
1086     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1087 }
1088
1089 int wxTextCtrl::GetLineLength(long lineNo) const
1090 {
1091     long pos = XYToPosition(0, lineNo);
1092
1093     return GetLengthOfLineContainingPos(pos);
1094 }
1095
1096 wxString wxTextCtrl::GetLineText(long lineNo) const
1097 {
1098     size_t len = (size_t)GetLineLength(lineNo) + 1;
1099
1100     // there must be at least enough place for the length WORD in the
1101     // buffer
1102     len += sizeof(WORD);
1103
1104     wxString str;
1105     wxChar *buf = str.GetWriteBuf(len);
1106
1107     *(WORD *)buf = (WORD)len;
1108     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1109     buf[len] = 0;
1110
1111     str.UngetWriteBuf(len);
1112
1113     return str;
1114 }
1115
1116 void wxTextCtrl::SetMaxLength(unsigned long len)
1117 {
1118     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1119 }
1120
1121 // ----------------------------------------------------------------------------
1122 // Undo/redo
1123 // ----------------------------------------------------------------------------
1124
1125 void wxTextCtrl::Undo()
1126 {
1127     if (CanUndo())
1128     {
1129         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1130     }
1131 }
1132
1133 void wxTextCtrl::Redo()
1134 {
1135     if (CanRedo())
1136     {
1137         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1138         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1139     }
1140 }
1141
1142 bool wxTextCtrl::CanUndo() const
1143 {
1144     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1145 }
1146
1147 bool wxTextCtrl::CanRedo() const
1148 {
1149     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1150 }
1151
1152 // ----------------------------------------------------------------------------
1153 // implemenation details
1154 // ----------------------------------------------------------------------------
1155
1156 void wxTextCtrl::Command(wxCommandEvent & event)
1157 {
1158     SetValue(event.GetString());
1159     ProcessCommand (event);
1160 }
1161
1162 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1163 {
1164     // By default, load the first file into the text window.
1165     if (event.GetNumberOfFiles() > 0)
1166     {
1167         LoadFile(event.GetFiles()[0]);
1168     }
1169 }
1170
1171 // ----------------------------------------------------------------------------
1172 // kbd input processing
1173 // ----------------------------------------------------------------------------
1174
1175 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1176 {
1177     MSG *msg = (MSG *)pMsg;
1178
1179     // check for our special keys here: if we don't do it and the parent frame
1180     // uses them as accelerators, they wouldn't work at all, so we disable
1181     // usual preprocessing for them
1182     if ( msg->message == WM_KEYDOWN )
1183     {
1184         WORD vkey = (WORD) msg->wParam;
1185         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1186         {
1187             if ( vkey == VK_BACK )
1188                 return FALSE;
1189         }
1190         else // no Alt
1191         {
1192             // we want to process some Ctrl-foo and Shift-bar but no key
1193             // combinations without either Ctrl or Shift nor with both of them
1194             // pressed
1195             const int ctrl = wxIsCtrlDown(),
1196                       shift = wxIsShiftDown();
1197             switch ( ctrl + shift )
1198             {
1199                 default:
1200                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1201                     // fall through
1202
1203                 case 0:
1204                 case 2:
1205                     break;
1206
1207                 case 1:
1208                     // either Ctrl or Shift pressed
1209                     if ( ctrl )
1210                     {
1211                         switch ( vkey )
1212                         {
1213                             case 'C':
1214                             case 'V':
1215                             case 'X':
1216                             case VK_INSERT:
1217                             case VK_DELETE:
1218                             case VK_HOME:
1219                             case VK_END:
1220                                 return FALSE;
1221                         }
1222                     }
1223                     else // Shift is pressed
1224                     {
1225                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1226                             return FALSE;
1227                     }
1228             }
1229         }
1230     }
1231
1232     return wxControl::MSWShouldPreProcessMessage(pMsg);
1233 }
1234
1235 void wxTextCtrl::OnChar(wxKeyEvent& event)
1236 {
1237     switch ( event.KeyCode() )
1238     {
1239         case WXK_RETURN:
1240             if ( !(m_windowStyle & wxTE_MULTILINE) )
1241             {
1242                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1243                 InitCommandEvent(event);
1244                 event.SetString(GetValue());
1245                 if ( GetEventHandler()->ProcessEvent(event) )
1246                     return;
1247             }
1248             //else: multiline controls need Enter for themselves
1249
1250             break;
1251
1252         case WXK_TAB:
1253             // always produce navigation event - even if we process TAB
1254             // ourselves the fact that we got here means that the user code
1255             // decided to skip processing of this TAB - probably to let it
1256             // do its default job.
1257             {
1258                 wxNavigationKeyEvent eventNav;
1259                 eventNav.SetDirection(!event.ShiftDown());
1260                 eventNav.SetWindowChange(event.ControlDown());
1261                 eventNav.SetEventObject(this);
1262
1263                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1264                     return;
1265             }
1266             break;
1267     }
1268
1269     // no, we didn't process it
1270     event.Skip();
1271 }
1272
1273 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1274 {
1275     long lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1276
1277     if ( nMsg == WM_GETDLGCODE )
1278     {
1279         // we always want the chars and the arrows
1280         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1281
1282         // we may have several different cases:
1283         // 1. normal case: both TAB and ENTER are used for dialog navigation
1284         // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1285         //    next control in the dialog
1286         // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1287         //    navigation
1288         // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass
1289         //    to the next control
1290
1291         // the multiline edit control should always get <Return> for itself
1292         if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1293             lDlgCode |= DLGC_WANTMESSAGE;
1294
1295         if ( HasFlag(wxTE_PROCESS_TAB) )
1296             lDlgCode |= DLGC_WANTTAB;
1297
1298         lRc |= lDlgCode;
1299     }
1300
1301     return lRc;
1302 }
1303
1304 // ----------------------------------------------------------------------------
1305 // text control event processing
1306 // ----------------------------------------------------------------------------
1307
1308 bool wxTextCtrl::SendUpdateEvent()
1309 {
1310     // is event reporting suspended?
1311     if ( m_suppressNextUpdate )
1312     {
1313         // do process the next one
1314         m_suppressNextUpdate = FALSE;
1315
1316         return FALSE;
1317     }
1318
1319     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1320     InitCommandEvent(event);
1321     event.SetString(GetValue());
1322
1323     return ProcessCommand(event);
1324 }
1325
1326 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1327 {
1328     switch ( param )
1329     {
1330         case EN_SETFOCUS:
1331         case EN_KILLFOCUS:
1332             {
1333                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1334                                                          : wxEVT_SET_FOCUS,
1335                                    m_windowId);
1336                 event.SetEventObject(this);
1337                 GetEventHandler()->ProcessEvent(event);
1338             }
1339             break;
1340
1341         case EN_CHANGE:
1342             SendUpdateEvent();
1343             break;
1344
1345         case EN_MAXTEXT:
1346             // the text size limit has been hit -- try to increase it
1347             if ( !AdjustSpaceLimit() )
1348             {
1349                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1350                 InitCommandEvent(event);
1351                 event.SetString(GetValue());
1352                 ProcessCommand(event);
1353             }
1354             break;
1355
1356             // the other edit notification messages are not processed
1357         default:
1358             return FALSE;
1359     }
1360
1361     // processed
1362     return TRUE;
1363 }
1364
1365 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1366 #if wxUSE_CTL3D
1367                                WXUINT message,
1368                                WXWPARAM wParam,
1369                                WXLPARAM lParam
1370 #else
1371                                WXUINT WXUNUSED(message),
1372                                WXWPARAM WXUNUSED(wParam),
1373                                WXLPARAM WXUNUSED(lParam)
1374 #endif
1375     )
1376 {
1377 #if wxUSE_CTL3D
1378     if ( m_useCtl3D )
1379     {
1380         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1381         return (WXHBRUSH) hbrush;
1382     }
1383 #endif // wxUSE_CTL3D
1384
1385     HDC hdc = (HDC)pDC;
1386     if (GetParent()->GetTransparentBackground())
1387         SetBkMode(hdc, TRANSPARENT);
1388     else
1389         SetBkMode(hdc, OPAQUE);
1390
1391     wxColour colBack = GetBackgroundColour();
1392
1393     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1394         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1395
1396     ::SetBkColor(hdc, wxColourToRGB(colBack));
1397     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1398
1399     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1400
1401     return (WXHBRUSH)brush->GetResourceHandle();
1402 }
1403
1404 // In WIN16, need to override normal erasing because
1405 // Ctl3D doesn't use the wxWindows background colour.
1406 #ifdef __WIN16__
1407 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1408 {
1409     wxColour col(m_backgroundColour);
1410
1411 #if wxUSE_CTL3D
1412     if (m_useCtl3D)
1413         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1414 #endif
1415
1416     RECT rect;
1417     ::GetClientRect(GetHwnd(), &rect);
1418
1419     COLORREF ref = wxColourToRGB(col);
1420     HBRUSH hBrush = ::CreateSolidBrush(ref);
1421     if ( !hBrush )
1422         wxLogLastError(wxT("CreateSolidBrush"));
1423
1424     HDC hdc = (HDC)event.GetDC()->GetHDC();
1425
1426     int mode = ::SetMapMode(hdc, MM_TEXT);
1427
1428     ::FillRect(hdc, &rect, hBrush);
1429     ::DeleteObject(hBrush);
1430     ::SetMapMode(hdc, mode);
1431
1432 }
1433 #endif // Win16
1434
1435 bool wxTextCtrl::AdjustSpaceLimit()
1436 {
1437 #ifndef __WIN16__
1438     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1439
1440     // HACK: we try to automatically extend the limit for the amount of text
1441     //       to allow (interactively) entering more than 64Kb of text under
1442     //       Win9x but we shouldn't reset the text limit which was previously
1443     //       set explicitly with SetMaxLength()
1444     //
1445     //       we could solve this by storing the limit we set in wxTextCtrl but
1446     //       to save space we prefer to simply test here the actual limit
1447     //       value: we consider that SetMaxLength() can only be called for
1448     //       values < 32Kb
1449     if ( limit < 0x8000 )
1450     {
1451         // we've got more text than limit set by SetMaxLength()
1452         return FALSE;
1453     }
1454
1455     unsigned int len = ::GetWindowTextLength(GetHwnd());
1456     if ( len >= limit )
1457     {
1458         limit = len + 0x8000;    // 32Kb
1459
1460 #if wxUSE_RICHEDIT
1461         if ( IsRich() )
1462         {
1463             // as a nice side effect, this also allows passing limit > 64Kb
1464             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1465         }
1466         else
1467 #endif // wxUSE_RICHEDIT
1468         {
1469             if ( limit > 0xffff )
1470             {
1471                 // this will set it to a platform-dependent maximum (much more
1472                 // than 64Kb under NT)
1473                 limit = 0;
1474             }
1475
1476             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1477         }
1478     }
1479 #endif // !Win16
1480
1481     // we changed the limit
1482     return TRUE;
1483 }
1484
1485 bool wxTextCtrl::AcceptsFocus() const
1486 {
1487     // we don't want focus if we can't be edited
1488     return IsEditable() && wxControl::AcceptsFocus();
1489 }
1490
1491 wxSize wxTextCtrl::DoGetBestSize() const
1492 {
1493     int cx, cy;
1494     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1495
1496     int wText = DEFAULT_ITEM_WIDTH;
1497
1498     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1499     if ( m_windowStyle & wxTE_MULTILINE )
1500     {
1501         hText *= wxMax(GetNumberOfLines(), 5);
1502     }
1503     //else: for single line control everything is ok
1504
1505     return wxSize(wText, hText);
1506 }
1507
1508 // ----------------------------------------------------------------------------
1509 // standard handlers for standard edit menu events
1510 // ----------------------------------------------------------------------------
1511
1512 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1513 {
1514     Cut();
1515 }
1516
1517 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1518 {
1519     Copy();
1520 }
1521
1522 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1523 {
1524     Paste();
1525 }
1526
1527 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1528 {
1529     Undo();
1530 }
1531
1532 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1533 {
1534     Redo();
1535 }
1536
1537 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1538 {
1539     event.Enable( CanCut() );
1540 }
1541
1542 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1543 {
1544     event.Enable( CanCopy() );
1545 }
1546
1547 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1548 {
1549     event.Enable( CanPaste() );
1550 }
1551
1552 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1553 {
1554     event.Enable( CanUndo() );
1555 }
1556
1557 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1558 {
1559     event.Enable( CanRedo() );
1560 }
1561
1562 // the rest of the file only deals with the rich edit controls
1563 #if wxUSE_RICHEDIT
1564
1565 // ----------------------------------------------------------------------------
1566 // EN_LINK processing
1567 // ----------------------------------------------------------------------------
1568
1569 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1570 {
1571 #ifndef __WXWINE__
1572     NMHDR *hdr = (NMHDR* )lParam;
1573     switch ( hdr->code )
1574     {
1575        case EN_MSGFILTER:
1576             {
1577                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
1578                 UINT msg = msgf->msg;
1579
1580                 // this is a bit crazy but richedit 1.0 sends us all mouse
1581                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
1582                 // generate the wxWin events for this message manually
1583                 //
1584                 // NB: in fact, this is still not totally correct as it does
1585                 //     send us WM_LBUTTONUP if the selection was cleared by the
1586                 //     last click -- so currently we get 2 events in this case,
1587                 //     but as I don't see any obvious way to check for this I
1588                 //     leave this code in place because it's still better than
1589                 //     not getting left up events at all
1590                 if ( msg == WM_LBUTTONUP )
1591                 {
1592                     WXUINT flags = msgf->wParam;
1593                     int x = GET_X_LPARAM(msgf->lParam),
1594                         y = GET_Y_LPARAM(msgf->lParam);
1595
1596                     HandleMouseEvent(msg, x, y, flags);
1597                 }
1598             }
1599
1600             // return TRUE to process the event (and FALSE to ignore it)
1601             return TRUE;
1602
1603         case EN_LINK:
1604             {
1605                 const ENLINK *enlink = (ENLINK *)hdr;
1606
1607                 switch ( enlink->msg )
1608                 {
1609                     case WM_SETCURSOR:
1610                         // ok, so it is hardcoded - do we really nee to
1611                         // customize it?
1612                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1613                         *result = TRUE;
1614                         break;
1615
1616                     case WM_MOUSEMOVE:
1617                     case WM_LBUTTONDOWN:
1618                     case WM_LBUTTONUP:
1619                     case WM_LBUTTONDBLCLK:
1620                     case WM_RBUTTONDOWN:
1621                     case WM_RBUTTONUP:
1622                     case WM_RBUTTONDBLCLK:
1623                         // send a mouse event
1624                         {
1625                             static const wxEventType eventsMouse[] =
1626                             {
1627                                 wxEVT_MOTION,
1628                                 wxEVT_LEFT_DOWN,
1629                                 wxEVT_LEFT_UP,
1630                                 wxEVT_LEFT_DCLICK,
1631                                 wxEVT_RIGHT_DOWN,
1632                                 wxEVT_RIGHT_UP,
1633                                 wxEVT_RIGHT_DCLICK,
1634                             };
1635
1636                             // the event ids are consecutive
1637                             wxMouseEvent
1638                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1639
1640                             InitMouseEvent(evtMouse,
1641                                            GET_X_LPARAM(enlink->lParam),
1642                                            GET_Y_LPARAM(enlink->lParam),
1643                                            enlink->wParam);
1644
1645                             wxTextUrlEvent event(m_windowId, evtMouse,
1646                                                  enlink->chrg.cpMin,
1647                                                  enlink->chrg.cpMax);
1648
1649                             InitCommandEvent(event);
1650
1651                             *result = ProcessCommand(event);
1652                         }
1653                         break;
1654                 }
1655             }
1656             return TRUE;
1657     }
1658 #endif
1659
1660     // not processed, leave it to the base class
1661     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
1662 }
1663
1664 // ----------------------------------------------------------------------------
1665 // colour setting for the rich edit controls
1666 // ----------------------------------------------------------------------------
1667
1668 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1669 {
1670     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1671     {
1672         // colour didn't really change
1673         return FALSE;
1674     }
1675
1676     if ( IsRich() )
1677     {
1678         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1679         // EM_SETBKGNDCOLOR additionally
1680         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1681     }
1682
1683     return TRUE;
1684 }
1685
1686 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1687 {
1688     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1689     {
1690         // colour didn't really change
1691         return FALSE;
1692     }
1693
1694     if ( IsRich() )
1695     {
1696         // change the colour of everything
1697         CHARFORMAT cf;
1698         wxZeroMemory(cf);
1699         cf.cbSize = sizeof(cf);
1700         cf.dwMask = CFM_COLOR;
1701         cf.crTextColor = wxColourToRGB(colour);
1702         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1703     }
1704
1705     return TRUE;
1706 }
1707
1708 // ----------------------------------------------------------------------------
1709 // styling support for rich edit controls
1710 // ----------------------------------------------------------------------------
1711
1712 #if wxUSE_RICHEDIT
1713
1714 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1715 {
1716 #ifdef __WXWINE__
1717     return FALSE;
1718 #else
1719     if ( !IsRich() )
1720     {
1721         // can't do it with normal text control
1722         return FALSE;
1723     }
1724
1725     // the richedit 1.0 doesn't handle setting background colour, so don't
1726     // even try to do anything if it's the only thing we want to change
1727     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() )
1728     {
1729         // nothing to do: return TRUE if there was really nothing to do and
1730         // FALSE if we failed to set bg colour
1731         return !style.HasBackgroundColour();
1732     }
1733
1734     // order the range if needed
1735     if ( start > end )
1736     {
1737         long tmp = start;
1738         start = end;
1739         end = tmp;
1740     }
1741
1742     // we can only change the format of the selection, so select the range we
1743     // want and restore the old selection later
1744     long startOld, endOld;
1745     GetSelection(&startOld, &endOld);
1746
1747     // but do we really have to change the selection?
1748     bool changeSel = start != startOld || end != endOld;
1749
1750     if ( changeSel )
1751     {
1752         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
1753     }
1754
1755     // initialize CHARFORMAT struct
1756 #if wxUSE_RICHEDIT2
1757     CHARFORMAT2 cf;
1758 #else
1759     CHARFORMAT cf;
1760 #endif
1761
1762     wxZeroMemory(cf);
1763
1764     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
1765     // CHARFORMAT in that case
1766 #if wxUSE_RICHEDIT2
1767     if ( m_verRichEdit == 1 )
1768     {
1769         // this is the only thing the control is going to grok
1770         cf.cbSize = sizeof(CHARFORMAT);
1771     }
1772     else
1773 #endif
1774     {
1775         // CHARFORMAT or CHARFORMAT2
1776         cf.cbSize = sizeof(cf);
1777     }
1778
1779     if ( style.HasFont() )
1780     {
1781         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1782         //     but using it doesn't seem to hurt neither so leaving it for now
1783
1784         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1785                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1786
1787         // fill in data from LOGFONT but recalculate lfHeight because we need
1788         // the real height in twips and not the negative number which
1789         // wxFillLogFont() returns (this is correct in general and works with
1790         // the Windows font mapper, but not here)
1791         LOGFONT lf;
1792         wxFillLogFont(&lf, &style.GetFont());
1793         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1794         cf.bCharSet = lf.lfCharSet;
1795         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1796         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1797
1798         // also deal with underline/italic/bold attributes: note that we must
1799         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1800         // style to allow clearing it
1801         if ( lf.lfItalic )
1802         {
1803             cf.dwEffects |= CFE_ITALIC;
1804         }
1805
1806         if ( lf.lfWeight == FW_BOLD )
1807         {
1808             cf.dwEffects |= CFE_BOLD;
1809         }
1810
1811         if ( lf.lfUnderline )
1812         {
1813             cf.dwEffects |= CFE_UNDERLINE;
1814         }
1815
1816         // strikeout fonts are not supported by wxWindows
1817     }
1818
1819     if ( style.HasTextColour() )
1820     {
1821         cf.dwMask |= CFM_COLOR;
1822         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1823     }
1824
1825 #if wxUSE_RICHEDIT2
1826     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
1827     {
1828         cf.dwMask |= CFM_BACKCOLOR;
1829         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1830     }
1831 #endif // wxUSE_RICHEDIT2
1832
1833     // do format the selection
1834     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1835                             SCF_SELECTION, (LPARAM)&cf) != 0;
1836     if ( !ok )
1837     {
1838         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1839     }
1840
1841     if ( changeSel )
1842     {
1843         // restore the original selection
1844         DoSetSelection(startOld, endOld, FALSE);
1845     }
1846
1847     return ok;
1848 #endif
1849 }
1850
1851 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
1852 {
1853     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
1854         return FALSE;
1855
1856     // we have to do this or the style wouldn't apply for the text typed by the
1857     // user
1858     long posLast = GetLastPosition();
1859     SetStyle(posLast, posLast, m_defaultStyle);
1860
1861     return TRUE;
1862 }
1863
1864 #endif
1865
1866 // ----------------------------------------------------------------------------
1867 // wxRichEditModule
1868 // ----------------------------------------------------------------------------
1869
1870 bool wxRichEditModule::OnInit()
1871 {
1872     // don't do anything - we will load it when needed
1873     return TRUE;
1874 }
1875
1876 void wxRichEditModule::OnExit()
1877 {
1878     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
1879     {
1880         if ( ms_hRichEdit[i] )
1881         {
1882             ::FreeLibrary(ms_hRichEdit[i]);
1883         }
1884     }
1885 }
1886
1887 /* static */
1888 bool wxRichEditModule::Load(int version)
1889 {
1890     // we don't support loading richedit 3.0 as I don't know how to distinguish
1891     // it from 2.0 anyhow
1892     wxCHECK_MSG( version == 1 || version == 2, FALSE,
1893                  _T("incorrect richedit control version requested") );
1894
1895     // make it the index in the array
1896     version--;
1897
1898     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
1899     {
1900         // we had already tried to load it and failed
1901         return FALSE;
1902     }
1903
1904     if ( ms_hRichEdit[version] )
1905     {
1906         // we've already got this one
1907         return TRUE;
1908     }
1909
1910     wxString dllname = version ? _T("riched20") : _T("riched32");
1911     dllname += _T(".dll");
1912
1913     ms_hRichEdit[version] = ::LoadLibrary(dllname);
1914
1915     if ( !ms_hRichEdit[version] )
1916     {
1917         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1918
1919         ms_hRichEdit[version] = (HINSTANCE)-1;
1920
1921         return FALSE;
1922     }
1923
1924     return TRUE;
1925 }
1926
1927 #endif // wxUSE_RICHEDIT
1928
1929 #endif // wxUSE_TEXTCTRL