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 #if wxUSE_UNICODE_MSLU
 557 bool wxTextCtrl::StreamIn(const wxString& value,
 558                           wxFontEncoding WXUNUSED(encoding),
 559                           bool selectionOnly)
 560 {
 561     const wchar_t *wpc = value.c_str();
 562 #else // !wxUSE_UNICODE_MSLU
 563 bool wxTextCtrl::StreamIn(const wxString& value,
 564                           wxFontEncoding encoding,
 565                           bool selectionOnly)
 566 {
 567     // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
 568     // text in the non default charset - otherwise it thinks it knows better
 569     // than we do and always shows it in the default one
 570
 571     // first get the Windows code page for this encoding
 572     long codepage = wxEncodingToCodepage(encoding);
 573     if ( codepage == -1 )
 574     {
 575         // unknown encoding
 576         return FALSE;
 577     }
 578
 579     // next translate to Unicode using this code page
 580     int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
 581
 582 #if wxUSE_WCHAR_T
 583     wxWCharBuffer wchBuf(len);
 584 #else
 585     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 586 #endif
 587
 588     if ( !::MultiByteToWideChar(codepage, 0, value, -1,
 589                                 (wchar_t *)(const wchar_t *)wchBuf, len) )
 590     {
 591         wxLogLastError(_T("MultiByteToWideChar"));
 592     }
 593
 594     // finally, stream it in the control
 595     const wchar_t *wpc = wchBuf;
 596 #endif // wxUSE_UNICODE_MSLU
 597
 598     EDITSTREAM eds;
 599     wxZeroMemory(eds);
 600     eds.dwCookie = (DWORD)&wpc;
 601     // the cast below is needed for broken (very) old mingw32 headers
 602     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 603
 604     if ( !::SendMessage(GetHwnd(), EM_STREAMIN,
 605                         SF_TEXT |
 606                         SF_UNICODE |
 607                         (selectionOnly ? SFF_SELECTION : 0),
 608                         (LPARAM)&eds) || eds.dwError )
 609     {
 610         wxLogLastError(_T("EM_STREAMIN"));
 611     }
 612
 613 #if !wxUSE_WCHAR_T
 614     free(wchBuf);
 615 #endif // !wxUSE_WCHAR_T
 616
 617     return TRUE;
 618 }
 619
 620 #endif // wxUSE_RICHEDIT
 621
 622 void wxTextCtrl::WriteText(const wxString& value)
 623 {
 624     DoWriteText(value);
 625 }
 626
 627 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 628 {
 629     wxString valueDos;
 630     if ( m_windowStyle & wxTE_MULTILINE )
 631         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 632     else
 633         valueDos = value;
 634
 635 #if wxUSE_RICHEDIT
 636     // there are several complications with the rich edit controls here
 637     bool done = FALSE;
 638     if ( IsRich() )
 639     {
 640         // first, ensure that the new text will be in the default style
 641         if ( !m_defaultStyle.IsDefault() )
 642         {
 643             long start, end;
 644             GetSelection(&start, &end);
 645             SetStyle(start, end, m_defaultStyle);
 646         }
 647
 648 #if wxUSE_UNICODE_MSLU
 649         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 650         // but EM_STREAMIN works
 651         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 652         {
 653            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 654         }
 655 #endif // wxUSE_UNICODE_MSLU
 656
 657 #if !wxUSE_UNICODE
 658         // next check if the text we're inserting must be shown in a non
 659         // default charset -- this only works for RichEdit > 1.0
 660         if ( GetRichVersion() > 1 )
 661         {
 662             wxFont font = m_defaultStyle.GetFont();
 663             if ( !font.Ok() )
 664                 font = GetFont();
 665
 666             if ( font.Ok() )
 667             {
 668                wxFontEncoding encoding = font.GetEncoding();
 669                if ( encoding != wxFONTENCODING_SYSTEM )
 670                {
 671                    done = StreamIn(valueDos, encoding, selectionOnly);
 672                }
 673             }
 674         }
 675 #endif // !wxUSE_UNICODE
 676     }
 677
 678     if ( !done )
 679 #endif // wxUSE_RICHEDIT
 680     {
 681 #if wxUSE_RICHEDIT
 682         // rich edit text control sends us 2 EN_CHANGE events when we send
 683         // WM_SETTEXT to it, we have to suppress one of them to make wxTextCtrl
 684         // behaviour consistent
 685         if ( IsRich() )
 686         {
 687             m_suppressNextUpdate = TRUE;
 688         }
 689 #endif // wxUSE_RICHEDIT
 690
 691         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 692                       0, (LPARAM)valueDos.c_str());
 693     }
 694
 695     AdjustSpaceLimit();
 696 }
 697
 698 void wxTextCtrl::AppendText(const wxString& text)
 699 {
 700     SetInsertionPointEnd();
 701
 702     WriteText(text);
 703 }
 704
 705 void wxTextCtrl::Clear()
 706 {
 707     ::SetWindowText(GetHwnd(), wxT(""));
 708
 709 #if wxUSE_RICHEDIT
 710     if ( !IsRich() )
 711 #endif // wxUSE_RICHEDIT
 712     {
 713         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 714         // but the normal ones don't -- make Clear() behaviour consistent by
 715         // always sending this event
 716         SendUpdateEvent();
 717     }
 718 }
 719
 720 #ifdef __WIN32__
 721
 722 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 723 {
 724     SetFocus();
 725
 726     size_t lenOld = GetValue().length();
 727
 728     wxUint32 code = event.GetRawKeyCode();
 729     ::keybd_event(code, 0, 0 /* key press */, 0);
 730     ::keybd_event(code, 0, KEYEVENTF_KEYUP, 0);
 731
 732     // assume that any alphanumeric key changes the total number of characters
 733     // in the control - this should work in 99% of cases
 734     return GetValue().length() != lenOld;
 735 }
 736
 737 #endif // __WIN32__
 738
 739 // ----------------------------------------------------------------------------
 740 // Clipboard operations
 741 // ----------------------------------------------------------------------------
 742
 743 void wxTextCtrl::Copy()
 744 {
 745     if (CanCopy())
 746     {
 747         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
 748     }
 749 }
 750
 751 void wxTextCtrl::Cut()
 752 {
 753     if (CanCut())
 754     {
 755         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
 756     }
 757 }
 758
 759 void wxTextCtrl::Paste()
 760 {
 761     if (CanPaste())
 762     {
 763         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
 764     }
 765 }
 766
 767 bool wxTextCtrl::CanCopy() const
 768 {
 769     // Can copy if there's a selection
 770     long from, to;
 771     GetSelection(&from, &to);
 772     return from != to;
 773 }
 774
 775 bool wxTextCtrl::CanCut() const
 776 {
 777     return CanCopy() && IsEditable();
 778 }
 779
 780 bool wxTextCtrl::CanPaste() const
 781 {
 782     if ( !IsEditable() )
 783         return FALSE;
 784
 785 #if wxUSE_RICHEDIT
 786     if ( IsRich() )
 787     {
 788         UINT cf = 0; // 0 == any format
 789
 790         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 791     }
 792 #endif // wxUSE_RICHEDIT
 793
 794     // Standard edit control: check for straight text on clipboard
 795     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 796         return FALSE;
 797
 798     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 799     ::CloseClipboard();
 800
 801     return isTextAvailable;
 802 }
 803
 804 // ----------------------------------------------------------------------------
 805 // Accessors
 806 // ----------------------------------------------------------------------------
 807
 808 void wxTextCtrl::SetEditable(bool editable)
 809 {
 810     HWND hWnd = GetHwnd();
 811     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 812 }
 813
 814 void wxTextCtrl::SetInsertionPoint(long pos)
 815 {
 816     DoSetSelection(pos, pos);
 817 }
 818
 819 void wxTextCtrl::SetInsertionPointEnd()
 820 {
 821     long pos;
 822
 823 #if wxUSE_RICHEDIT
 824     if ( m_verRichEdit == 1 )
 825     {
 826         // we don't have to waste time calling GetLastPosition() in this case
 827         pos = -1;
 828     }
 829     else // !RichEdit 1.0
 830 #endif // wxUSE_RICHEDIT
 831     {
 832         pos = GetLastPosition();
 833     }
 834
 835     SetInsertionPoint(pos);
 836 }
 837
 838 long wxTextCtrl::GetInsertionPoint() const
 839 {
 840 #if wxUSE_RICHEDIT
 841     if ( IsRich() )
 842     {
 843         CHARRANGE range;
 844         range.cpMin = 0;
 845         range.cpMax = 0;
 846         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 847         return range.cpMin;
 848     }
 849 #endif // wxUSE_RICHEDIT
 850
 851     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 852     return Pos & 0xFFFF;
 853 }
 854
 855 long wxTextCtrl::GetLastPosition() const
 856 {
 857     int numLines = GetNumberOfLines();
 858     long posStartLastLine = XYToPosition(0, numLines - 1);
 859
 860     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
 861
 862     return posStartLastLine + lenLastLine;
 863 }
 864
 865 // If the return values from and to are the same, there is no
 866 // selection.
 867 void wxTextCtrl::GetSelection(long* from, long* to) const
 868 {
 869 #if wxUSE_RICHEDIT
 870     if ( IsRich() )
 871     {
 872         CHARRANGE charRange;
 873         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 874
 875         *from = charRange.cpMin;
 876         *to = charRange.cpMax;
 877     }
 878     else
 879 #endif // !wxUSE_RICHEDIT
 880     {
 881         DWORD dwStart, dwEnd;
 882         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 883
 884         *from = dwStart;
 885         *to = dwEnd;
 886     }
 887 }
 888
 889 bool wxTextCtrl::IsEditable() const
 890 {
 891     // strangely enough, we may be called before the control is created: our
 892     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
 893     // us
 894     if ( !m_hWnd )
 895         return TRUE;
 896
 897     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 898
 899     return (style & ES_READONLY) == 0;
 900 }
 901
 902 // ----------------------------------------------------------------------------
 903 // selection
 904 // ----------------------------------------------------------------------------
 905
 906 void wxTextCtrl::SetSelection(long from, long to)
 907 {
 908     // if from and to are both -1, it means (in wxWindows) that all text should
 909     // be selected - translate into Windows convention
 910     if ( (from == -1) && (to == -1) )
 911     {
 912         from = 0;
 913         to = -1;
 914     }
 915
 916     DoSetSelection(from, to);
 917 }
 918
 919 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 920 {
 921     HWND hWnd = GetHwnd();
 922
 923 #ifdef __WIN32__
 924 #if wxUSE_RICHEDIT
 925     if ( IsRich() )
 926     {
 927         CHARRANGE range;
 928         range.cpMin = from;
 929         range.cpMax = to;
 930         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 931     }
 932     else
 933 #endif // wxUSE_RICHEDIT
 934     {
 935         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
 936     }
 937
 938     if ( scrollCaret )
 939     {
 940         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 941     }
 942 #else // Win16
 943     // WPARAM is 0: selection is scrolled into view
 944     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
 945 #endif // Win32/16
 946 }
 947
 948 // ----------------------------------------------------------------------------
 949 // Editing
 950 // ----------------------------------------------------------------------------
 951
 952 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 953 {
 954     // Set selection and remove it
 955     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
 956
 957     SendMessage(GetHwnd(), EM_REPLACESEL,
 958 #ifdef __WIN32__
 959                 TRUE,
 960 #else
 961                 FALSE,
 962 #endif
 963                 (LPARAM)value.c_str());
 964 }
 965
 966 void wxTextCtrl::Remove(long from, long to)
 967 {
 968     Replace(from, to, _T(""));
 969 }
 970
 971 bool wxTextCtrl::LoadFile(const wxString& file)
 972 {
 973     if ( wxTextCtrlBase::LoadFile(file) )
 974     {
 975         // update the size limit if needed
 976         AdjustSpaceLimit();
 977
 978         return TRUE;
 979     }
 980
 981     return FALSE;
 982 }
 983
 984 bool wxTextCtrl::IsModified() const
 985 {
 986     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
 987 }
 988
 989 // Makes 'unmodified'
 990 void wxTextCtrl::DiscardEdits()
 991 {
 992     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 993 }
 994
 995 int wxTextCtrl::GetNumberOfLines() const
 996 {
 997     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 998 }
 999
1000 long wxTextCtrl::XYToPosition(long x, long y) const
1001 {
1002     // This gets the char index for the _beginning_ of this line
1003     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1004
1005     return charIndex + x;
1006 }
1007
1008 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1009 {
1010     HWND hWnd = GetHwnd();
1011
1012     // This gets the line number containing the character
1013     long lineNo;
1014 #if wxUSE_RICHEDIT
1015     if ( IsRich() )
1016     {
1017         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1018     }
1019     else
1020 #endif // wxUSE_RICHEDIT
1021     {
1022         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1023     }
1024
1025     if ( lineNo == -1 )
1026     {
1027         // no such line
1028         return FALSE;
1029     }
1030
1031     // This gets the char index for the _beginning_ of this line
1032     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1033     if ( charIndex == -1 )
1034     {
1035         return FALSE;
1036     }
1037
1038     // The X position must therefore be the different between pos and charIndex
1039     if ( x )
1040         *x = pos - charIndex;
1041     if ( y )
1042         *y = lineNo;
1043
1044     return TRUE;
1045 }
1046
1047 void wxTextCtrl::ShowPosition(long pos)
1048 {
1049     HWND hWnd = GetHwnd();
1050
1051     // To scroll to a position, we pass the number of lines and characters
1052     // to scroll *by*. This means that we need to:
1053     // (1) Find the line position of the current line.
1054     // (2) Find the line position of pos.
1055     // (3) Scroll by (pos - current).
1056     // For now, ignore the horizontal scrolling.
1057
1058     // Is this where scrolling is relative to - the line containing the caret?
1059     // Or is the first visible line??? Try first visible line.
1060 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1061
1062     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1063
1064     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1065
1066     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1067
1068     if (linesToScroll != 0)
1069       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1070 }
1071
1072 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1073 {
1074     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1075 }
1076
1077 int wxTextCtrl::GetLineLength(long lineNo) const
1078 {
1079     long pos = XYToPosition(0, lineNo);
1080
1081     return GetLengthOfLineContainingPos(pos);
1082 }
1083
1084 wxString wxTextCtrl::GetLineText(long lineNo) const
1085 {
1086     size_t len = (size_t)GetLineLength(lineNo) + 1;
1087
1088     // there must be at least enough place for the length WORD in the
1089     // buffer
1090     len += sizeof(WORD);
1091
1092     wxString str;
1093     wxChar *buf = str.GetWriteBuf(len);
1094
1095     *(WORD *)buf = (WORD)len;
1096     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1097     buf[len] = 0;
1098
1099     str.UngetWriteBuf(len);
1100
1101     return str;
1102 }
1103
1104 void wxTextCtrl::SetMaxLength(unsigned long len)
1105 {
1106     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1107 }
1108
1109 // ----------------------------------------------------------------------------
1110 // Undo/redo
1111 // ----------------------------------------------------------------------------
1112
1113 void wxTextCtrl::Undo()
1114 {
1115     if (CanUndo())
1116     {
1117         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1118     }
1119 }
1120
1121 void wxTextCtrl::Redo()
1122 {
1123     if (CanRedo())
1124     {
1125         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1126         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1127     }
1128 }
1129
1130 bool wxTextCtrl::CanUndo() const
1131 {
1132     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1133 }
1134
1135 bool wxTextCtrl::CanRedo() const
1136 {
1137     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1138 }
1139
1140 // ----------------------------------------------------------------------------
1141 // implemenation details
1142 // ----------------------------------------------------------------------------
1143
1144 void wxTextCtrl::Command(wxCommandEvent & event)
1145 {
1146     SetValue(event.GetString());
1147     ProcessCommand (event);
1148 }
1149
1150 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1151 {
1152     // By default, load the first file into the text window.
1153     if (event.GetNumberOfFiles() > 0)
1154     {
1155         LoadFile(event.GetFiles()[0]);
1156     }
1157 }
1158
1159 // ----------------------------------------------------------------------------
1160 // kbd input processing
1161 // ----------------------------------------------------------------------------
1162
1163 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1164 {
1165     MSG *msg = (MSG *)pMsg;
1166
1167     // check for our special keys here: if we don't do it and the parent frame
1168     // uses them as accelerators, they wouldn't work at all, so we disable
1169     // usual preprocessing for them
1170     if ( msg->message == WM_KEYDOWN )
1171     {
1172         WORD vkey = (WORD) msg->wParam;
1173         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1174         {
1175             if ( vkey == VK_BACK )
1176                 return FALSE;
1177         }
1178         else // no Alt
1179         {
1180             if ( wxIsCtrlDown() )
1181             {
1182                 switch ( vkey )
1183                 {
1184                     case 'C':
1185                     case 'V':
1186                     case 'X':
1187                     case VK_INSERT:
1188                     case VK_DELETE:
1189                     case VK_HOME:
1190                     case VK_END:
1191                         return FALSE;
1192                 }
1193             }
1194             else if ( wxIsShiftDown() )
1195             {
1196                 if ( vkey == VK_INSERT || vkey == VK_DELETE )
1197                     return FALSE;
1198             }
1199         }
1200     }
1201
1202     return wxControl::MSWShouldPreProcessMessage(pMsg);
1203 }
1204
1205 void wxTextCtrl::OnChar(wxKeyEvent& event)
1206 {
1207     switch ( event.KeyCode() )
1208     {
1209         case WXK_RETURN:
1210             if ( !(m_windowStyle & wxTE_MULTILINE) )
1211             {
1212                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1213                 InitCommandEvent(event);
1214                 event.SetString(GetValue());
1215                 if ( GetEventHandler()->ProcessEvent(event) )
1216                     return;
1217             }
1218             //else: multiline controls need Enter for themselves
1219
1220             break;
1221
1222         case WXK_TAB:
1223             // always produce navigation event - even if we process TAB
1224             // ourselves the fact that we got here means that the user code
1225             // decided to skip processing of this TAB - probably to let it
1226             // do its default job.
1227             {
1228                 wxNavigationKeyEvent eventNav;
1229                 eventNav.SetDirection(!event.ShiftDown());
1230                 eventNav.SetWindowChange(event.ControlDown());
1231                 eventNav.SetEventObject(this);
1232
1233                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1234                     return;
1235             }
1236             break;
1237     }
1238
1239     // no, we didn't process it
1240     event.Skip();
1241 }
1242
1243 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1244 {
1245     long lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1246
1247     if ( nMsg == WM_GETDLGCODE )
1248     {
1249         // we always want the chars and the arrows
1250         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1251
1252         // we may have several different cases:
1253         // 1. normal case: both TAB and ENTER are used for dialog navigation
1254         // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1255         //    next control in the dialog
1256         // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1257         //    navigation
1258         // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass
1259         //    to the next control
1260
1261         // the multiline edit control should always get <Return> for itself
1262         if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1263             lDlgCode |= DLGC_WANTMESSAGE;
1264
1265         if ( HasFlag(wxTE_PROCESS_TAB) )
1266             lDlgCode |= DLGC_WANTTAB;
1267
1268         lRc |= lDlgCode;
1269     }
1270
1271     return lRc;
1272 }
1273
1274 // ----------------------------------------------------------------------------
1275 // text control event processing
1276 // ----------------------------------------------------------------------------
1277
1278 bool wxTextCtrl::SendUpdateEvent()
1279 {
1280     // is event reporting suspended?
1281     if ( m_suppressNextUpdate )
1282     {
1283         // do process the next one
1284         m_suppressNextUpdate = FALSE;
1285
1286         return FALSE;
1287     }
1288
1289     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1290     InitCommandEvent(event);
1291     event.SetString(GetValue());
1292
1293     return ProcessCommand(event);
1294 }
1295
1296 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1297 {
1298     switch ( param )
1299     {
1300         case EN_SETFOCUS:
1301         case EN_KILLFOCUS:
1302             {
1303                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1304                                                          : wxEVT_SET_FOCUS,
1305                                    m_windowId);
1306                 event.SetEventObject(this);
1307                 GetEventHandler()->ProcessEvent(event);
1308             }
1309             break;
1310
1311         case EN_CHANGE:
1312             SendUpdateEvent();
1313             break;
1314
1315         case EN_MAXTEXT:
1316             // the text size limit has been hit -- try to increase it
1317             if ( !AdjustSpaceLimit() )
1318             {
1319                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1320                 InitCommandEvent(event);
1321                 event.SetString(GetValue());
1322                 ProcessCommand(event);
1323             }
1324             break;
1325
1326             // the other edit notification messages are not processed
1327         default:
1328             return FALSE;
1329     }
1330
1331     // processed
1332     return TRUE;
1333 }
1334
1335 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1336 #if wxUSE_CTL3D
1337                                WXUINT message,
1338                                WXWPARAM wParam,
1339                                WXLPARAM lParam
1340 #else
1341                                WXUINT WXUNUSED(message),
1342                                WXWPARAM WXUNUSED(wParam),
1343                                WXLPARAM WXUNUSED(lParam)
1344 #endif
1345     )
1346 {
1347 #if wxUSE_CTL3D
1348     if ( m_useCtl3D )
1349     {
1350         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1351         return (WXHBRUSH) hbrush;
1352     }
1353 #endif // wxUSE_CTL3D
1354
1355     HDC hdc = (HDC)pDC;
1356     if (GetParent()->GetTransparentBackground())
1357         SetBkMode(hdc, TRANSPARENT);
1358     else
1359         SetBkMode(hdc, OPAQUE);
1360
1361     wxColour colBack = GetBackgroundColour();
1362
1363     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1364         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1365
1366     ::SetBkColor(hdc, wxColourToRGB(colBack));
1367     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1368
1369     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1370
1371     return (WXHBRUSH)brush->GetResourceHandle();
1372 }
1373
1374 // In WIN16, need to override normal erasing because
1375 // Ctl3D doesn't use the wxWindows background colour.
1376 #ifdef __WIN16__
1377 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1378 {
1379     wxColour col(m_backgroundColour);
1380
1381 #if wxUSE_CTL3D
1382     if (m_useCtl3D)
1383         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1384 #endif
1385
1386     RECT rect;
1387     ::GetClientRect(GetHwnd(), &rect);
1388
1389     COLORREF ref = wxColourToRGB(col);
1390     HBRUSH hBrush = ::CreateSolidBrush(ref);
1391     if ( !hBrush )
1392         wxLogLastError(wxT("CreateSolidBrush"));
1393
1394     HDC hdc = (HDC)event.GetDC()->GetHDC();
1395
1396     int mode = ::SetMapMode(hdc, MM_TEXT);
1397
1398     ::FillRect(hdc, &rect, hBrush);
1399     ::DeleteObject(hBrush);
1400     ::SetMapMode(hdc, mode);
1401
1402 }
1403 #endif // Win16
1404
1405 bool wxTextCtrl::AdjustSpaceLimit()
1406 {
1407 #ifndef __WIN16__
1408     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1409
1410     // HACK: we try to automatically extend the limit for the amount of text
1411     //       to allow (interactively) entering more than 64Kb of text under
1412     //       Win9x but we shouldn't reset the text limit which was previously
1413     //       set explicitly with SetMaxLength()
1414     //
1415     //       we could solve this by storing the limit we set in wxTextCtrl but
1416     //       to save space we prefer to simply test here the actual limit
1417     //       value: we consider that SetMaxLength() can only be called for
1418     //       values < 32Kb
1419     if ( limit < 0x8000 )
1420     {
1421         // we've got more text than limit set by SetMaxLength()
1422         return FALSE;
1423     }
1424
1425     unsigned int len = ::GetWindowTextLength(GetHwnd());
1426     if ( len >= limit )
1427     {
1428         limit = len + 0x8000;    // 32Kb
1429
1430 #if wxUSE_RICHEDIT
1431         if ( IsRich() )
1432         {
1433             // as a nice side effect, this also allows passing limit > 64Kb
1434             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1435         }
1436         else
1437 #endif // wxUSE_RICHEDIT
1438         {
1439             if ( limit > 0xffff )
1440             {
1441                 // this will set it to a platform-dependent maximum (much more
1442                 // than 64Kb under NT)
1443                 limit = 0;
1444             }
1445
1446             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1447         }
1448     }
1449 #endif // !Win16
1450
1451     // we changed the limit
1452     return TRUE;
1453 }
1454
1455 bool wxTextCtrl::AcceptsFocus() const
1456 {
1457     // we don't want focus if we can't be edited
1458     return IsEditable() && wxControl::AcceptsFocus();
1459 }
1460
1461 wxSize wxTextCtrl::DoGetBestSize() const
1462 {
1463     int cx, cy;
1464     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1465
1466     int wText = DEFAULT_ITEM_WIDTH;
1467
1468     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1469     if ( m_windowStyle & wxTE_MULTILINE )
1470     {
1471         hText *= wxMax(GetNumberOfLines(), 5);
1472     }
1473     //else: for single line control everything is ok
1474
1475     return wxSize(wText, hText);
1476 }
1477
1478 // ----------------------------------------------------------------------------
1479 // standard handlers for standard edit menu events
1480 // ----------------------------------------------------------------------------
1481
1482 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1483 {
1484     Cut();
1485 }
1486
1487 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1488 {
1489     Copy();
1490 }
1491
1492 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1493 {
1494     Paste();
1495 }
1496
1497 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1498 {
1499     Undo();
1500 }
1501
1502 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1503 {
1504     Redo();
1505 }
1506
1507 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1508 {
1509     event.Enable( CanCut() );
1510 }
1511
1512 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1513 {
1514     event.Enable( CanCopy() );
1515 }
1516
1517 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1518 {
1519     event.Enable( CanPaste() );
1520 }
1521
1522 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1523 {
1524     event.Enable( CanUndo() );
1525 }
1526
1527 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1528 {
1529     event.Enable( CanRedo() );
1530 }
1531
1532 // the rest of the file only deals with the rich edit controls
1533 #if wxUSE_RICHEDIT
1534
1535 // ----------------------------------------------------------------------------
1536 // EN_LINK processing
1537 // ----------------------------------------------------------------------------
1538
1539 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1540 {
1541     NMHDR *hdr = (NMHDR* )lParam;
1542     switch ( hdr->code )
1543     {
1544         case EN_MSGFILTER:
1545             {
1546                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
1547                 UINT msg = msgf->msg;
1548
1549                 // this is a bit crazy but richedit 1.0 sends us all mouse
1550                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
1551                 // generate the wxWin events for this message manually
1552                 //
1553                 // NB: in fact, this is still not totally correct as it does
1554                 //     send us WM_LBUTTONUP if the selection was cleared by the
1555                 //     last click -- so currently we get 2 events in this case,
1556                 //     but as I don't see any obvious way to check for this I
1557                 //     leave this code in place because it's still better than
1558                 //     not getting left up events at all
1559                 if ( msg == WM_LBUTTONUP )
1560                 {
1561                     WXUINT flags = msgf->wParam;
1562                     int x = GET_X_LPARAM(msgf->lParam),
1563                         y = GET_Y_LPARAM(msgf->lParam);
1564
1565                     HandleMouseEvent(msg, x, y, flags);
1566                 }
1567             }
1568
1569             // return TRUE to process the event (and FALSE to ignore it)
1570             return TRUE;
1571
1572         case EN_LINK:
1573             {
1574                 const ENLINK *enlink = (ENLINK *)hdr;
1575
1576                 switch ( enlink->msg )
1577                 {
1578                     case WM_SETCURSOR:
1579                         // ok, so it is hardcoded - do we really nee to
1580                         // customize it?
1581                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1582                         *result = TRUE;
1583                         break;
1584
1585                     case WM_MOUSEMOVE:
1586                     case WM_LBUTTONDOWN:
1587                     case WM_LBUTTONUP:
1588                     case WM_LBUTTONDBLCLK:
1589                     case WM_RBUTTONDOWN:
1590                     case WM_RBUTTONUP:
1591                     case WM_RBUTTONDBLCLK:
1592                         // send a mouse event
1593                         {
1594                             static const wxEventType eventsMouse[] =
1595                             {
1596                                 wxEVT_MOTION,
1597                                 wxEVT_LEFT_DOWN,
1598                                 wxEVT_LEFT_UP,
1599                                 wxEVT_LEFT_DCLICK,
1600                                 wxEVT_RIGHT_DOWN,
1601                                 wxEVT_RIGHT_UP,
1602                                 wxEVT_RIGHT_DCLICK,
1603                             };
1604
1605                             // the event ids are consecutive
1606                             wxMouseEvent
1607                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1608
1609                             InitMouseEvent(evtMouse,
1610                                            GET_X_LPARAM(enlink->lParam),
1611                                            GET_Y_LPARAM(enlink->lParam),
1612                                            enlink->wParam);
1613
1614                             wxTextUrlEvent event(m_windowId, evtMouse,
1615                                                  enlink->chrg.cpMin,
1616                                                  enlink->chrg.cpMax);
1617
1618                             InitCommandEvent(event);
1619
1620                             *result = ProcessCommand(event);
1621                         }
1622                         break;
1623                 }
1624             }
1625             return TRUE;
1626     }
1627
1628     // not processed, leave it to the base class
1629     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
1630 }
1631
1632 // ----------------------------------------------------------------------------
1633 // colour setting for the rich edit controls
1634 // ----------------------------------------------------------------------------
1635
1636 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1637 {
1638     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1639     {
1640         // colour didn't really change
1641         return FALSE;
1642     }
1643
1644     if ( IsRich() )
1645     {
1646         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1647         // EM_SETBKGNDCOLOR additionally
1648         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1649     }
1650
1651     return TRUE;
1652 }
1653
1654 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1655 {
1656     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1657     {
1658         // colour didn't really change
1659         return FALSE;
1660     }
1661
1662     if ( IsRich() )
1663     {
1664         // change the colour of everything
1665         CHARFORMAT cf;
1666         wxZeroMemory(cf);
1667         cf.cbSize = sizeof(cf);
1668         cf.dwMask = CFM_COLOR;
1669         cf.crTextColor = wxColourToRGB(colour);
1670         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1671     }
1672
1673     return TRUE;
1674 }
1675
1676 // ----------------------------------------------------------------------------
1677 // styling support for rich edit controls
1678 // ----------------------------------------------------------------------------
1679
1680 #if wxUSE_RICHEDIT
1681
1682 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1683 {
1684     if ( !IsRich() )
1685     {
1686         // can't do it with normal text control
1687         return FALSE;
1688     }
1689
1690     // the richedit 1.0 doesn't handle setting background colour, so don't
1691     // even try to do anything if it's the only thing we want to change
1692     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() )
1693     {
1694         // nothing to do: return TRUE if there was really nothing to do and
1695         // FALSE if we failed to set bg colour
1696         return !style.HasBackgroundColour();
1697     }
1698
1699     // order the range if needed
1700     if ( start > end )
1701     {
1702         long tmp = start;
1703         start = end;
1704         end = tmp;
1705     }
1706
1707     // we can only change the format of the selection, so select the range we
1708     // want and restore the old selection later
1709     long startOld, endOld;
1710     GetSelection(&startOld, &endOld);
1711
1712     // but do we really have to change the selection?
1713     bool changeSel = start != startOld || end != endOld;
1714
1715     if ( changeSel )
1716     {
1717         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
1718     }
1719
1720     // initialize CHARFORMAT struct
1721 #if wxUSE_RICHEDIT2
1722     CHARFORMAT2 cf;
1723 #else
1724     CHARFORMAT cf;
1725 #endif
1726
1727     wxZeroMemory(cf);
1728
1729     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
1730     // CHARFORMAT in that case
1731 #if wxUSE_RICHEDIT2
1732     if ( m_verRichEdit == 1 )
1733     {
1734         // this is the only thing the control is going to grok
1735         cf.cbSize = sizeof(CHARFORMAT);
1736     }
1737     else
1738 #endif
1739     {
1740         // CHARFORMAT or CHARFORMAT2
1741         cf.cbSize = sizeof(cf);
1742     }
1743
1744     if ( style.HasFont() )
1745     {
1746         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1747         //     but using it doesn't seem to hurt neither so leaving it for now
1748
1749         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1750                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1751
1752         // fill in data from LOGFONT but recalculate lfHeight because we need
1753         // the real height in twips and not the negative number which
1754         // wxFillLogFont() returns (this is correct in general and works with
1755         // the Windows font mapper, but not here)
1756         LOGFONT lf;
1757         wxFillLogFont(&lf, &style.GetFont());
1758         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1759         cf.bCharSet = lf.lfCharSet;
1760         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1761         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1762
1763         // also deal with underline/italic/bold attributes: note that we must
1764         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1765         // style to allow clearing it
1766         if ( lf.lfItalic )
1767         {
1768             cf.dwEffects |= CFE_ITALIC;
1769         }
1770
1771         if ( lf.lfWeight == FW_BOLD )
1772         {
1773             cf.dwEffects |= CFE_BOLD;
1774         }
1775
1776         if ( lf.lfUnderline )
1777         {
1778             cf.dwEffects |= CFE_UNDERLINE;
1779         }
1780
1781         // strikeout fonts are not supported by wxWindows
1782     }
1783
1784     if ( style.HasTextColour() )
1785     {
1786         cf.dwMask |= CFM_COLOR;
1787         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1788     }
1789
1790 #if wxUSE_RICHEDIT2
1791     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
1792     {
1793         cf.dwMask |= CFM_BACKCOLOR;
1794         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1795     }
1796 #endif // wxUSE_RICHEDIT2
1797
1798     // do format the selection
1799     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1800                             SCF_SELECTION, (LPARAM)&cf) != 0;
1801     if ( !ok )
1802     {
1803         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1804     }
1805
1806     if ( changeSel )
1807     {
1808         // restore the original selection
1809         DoSetSelection(startOld, endOld, FALSE);
1810     }
1811
1812     return ok;
1813 }
1814
1815 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
1816 {
1817     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
1818         return FALSE;
1819
1820     // we have to do this or the style wouldn't apply for the text typed by the
1821     // user
1822     long posLast = GetLastPosition();
1823     SetStyle(posLast, posLast, m_defaultStyle);
1824
1825     return TRUE;
1826 }
1827
1828 #endif
1829
1830 // ----------------------------------------------------------------------------
1831 // wxRichEditModule
1832 // ----------------------------------------------------------------------------
1833
1834 bool wxRichEditModule::OnInit()
1835 {
1836     // don't do anything - we will load it when needed
1837     return TRUE;
1838 }
1839
1840 void wxRichEditModule::OnExit()
1841 {
1842     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
1843     {
1844         if ( ms_hRichEdit[i] )
1845         {
1846             ::FreeLibrary(ms_hRichEdit[i]);
1847         }
1848     }
1849 }
1850
1851 /* static */
1852 bool wxRichEditModule::Load(int version)
1853 {
1854     // we don't support loading richedit 3.0 as I don't know how to distinguish
1855     // it from 2.0 anyhow
1856     wxCHECK_MSG( version == 1 || version == 2, FALSE,
1857                  _T("incorrect richedit control version requested") );
1858
1859     // make it the index in the array
1860     version--;
1861
1862     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
1863     {
1864         // we had already tried to load it and failed
1865         return FALSE;
1866     }
1867
1868     if ( ms_hRichEdit[version] )
1869     {
1870         // we've already got this one
1871         return TRUE;
1872     }
1873
1874     wxString dllname = version ? _T("riched20") : _T("riched32");
1875     dllname += _T(".dll");
1876
1877     ms_hRichEdit[version] = ::LoadLibrary(dllname);
1878
1879     if ( !ms_hRichEdit[version] )
1880     {
1881         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1882
1883         ms_hRichEdit[version] = (HINSTANCE)-1;
1884
1885         return FALSE;
1886     }
1887
1888     return TRUE;
1889 }
1890
1891 #endif // wxUSE_RICHEDIT
1892
1893 #endif // wxUSE_TEXTCTRL