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
   9 // Licence:     wxWindows licence
  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     #include "wx/menu.h"
  42 #endif
  43
  44 #include "wx/module.h"
  45
  46 #if wxUSE_CLIPBOARD
  47     #include "wx/clipbrd.h"
  48 #endif
  49
  50 #include "wx/textfile.h"
  51
  52 #include <windowsx.h>
  53
  54 #include "wx/msw/private.h"
  55
  56 #include <string.h>
  57 #include <stdlib.h>
  58 #include <sys/types.h>
  59
  60 #if wxUSE_RICHEDIT
  61
  62 // old mingw32 has richedit stuff directly in windows.h and doesn't have
  63 // richedit.h at all
  64 #if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__)
  65     #include <richedit.h>
  66 #endif
  67
  68 #include "wx/msw/missing.h"
  69
  70 #endif // wxUSE_RICHEDIT
  71
  72 // ----------------------------------------------------------------------------
  73 // private functions
  74 // ----------------------------------------------------------------------------
  75
  76 #if wxUSE_RICHEDIT
  77
  78 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb);
  79
  80 #endif // wxUSE_RICHEDIT
  81
  82 // ----------------------------------------------------------------------------
  83 // private classes
  84 // ----------------------------------------------------------------------------
  85
  86 #if wxUSE_RICHEDIT
  87
  88 // this module initializes RichEdit DLL(s) if needed
  89 class wxRichEditModule : public wxModule
  90 {
  91 public:
  92     virtual bool OnInit();
  93     virtual void OnExit();
  94
  95     // load the richedit DLL of at least of required version
  96     static bool Load(int version = 1);
  97
  98 private:
  99     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
 100     static HINSTANCE ms_hRichEdit[2];
 101
 102     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 103 };
 104
 105 HINSTANCE wxRichEditModule::ms_hRichEdit[2] = { NULL, NULL };
 106
 107 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 108
 109 #endif // wxUSE_RICHEDIT
 110
 111 // ----------------------------------------------------------------------------
 112 // event tables and other macros
 113 // ----------------------------------------------------------------------------
 114
 115 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 116
 117 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 118     EVT_CHAR(wxTextCtrl::OnChar)
 119     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 120
 121 #if wxUSE_RICHEDIT
 122     EVT_RIGHT_UP(wxTextCtrl::OnRightClick)
 123 #endif
 124
 125     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 126     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 127     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 128     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 129     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 130     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 131     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 132
 133     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 134     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 135     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 136     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 137     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 138     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 139     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 140 #ifdef __WIN16__
 141     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 142 #endif
 143 END_EVENT_TABLE()
 144
 145 // ============================================================================
 146 // implementation
 147 // ============================================================================
 148
 149 // ----------------------------------------------------------------------------
 150 // creation
 151 // ----------------------------------------------------------------------------
 152
 153 void wxTextCtrl::Init()
 154 {
 155 #if wxUSE_RICHEDIT
 156     m_verRichEdit = 0;
 157 #endif // wxUSE_RICHEDIT
 158
 159     m_privateContextMenu = NULL;
 160     m_suppressNextUpdate = FALSE;
 161 }
 162
 163 wxTextCtrl::~wxTextCtrl()
 164 {
 165     if (m_privateContextMenu)
 166     {
 167         delete m_privateContextMenu;
 168         m_privateContextMenu = NULL;
 169     }
 170 }
 171
 172 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 173                         const wxString& value,
 174                         const wxPoint& pos,
 175                         const wxSize& size,
 176                         long style,
 177                         const wxValidator& validator,
 178                         const wxString& name)
 179 {
 180     // base initialization
 181     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 182         return FALSE;
 183
 184     if ( parent )
 185         parent->AddChild(this);
 186
 187     // translate wxWin style flags to MSW ones
 188     WXDWORD msStyle = MSWGetCreateWindowFlags();
 189
 190     // do create the control - either an EDIT or RICHEDIT
 191     wxString windowClass = wxT("EDIT");
 192
 193 #if wxUSE_RICHEDIT
 194     if ( m_windowStyle & wxTE_AUTO_URL )
 195     {
 196         // automatic URL detection only works in RichEdit 2.0+
 197         m_windowStyle |= wxTE_RICH2;
 198     }
 199
 200     if ( m_windowStyle & wxTE_RICH2 )
 201     {
 202         // using richedit 2.0 implies using wxTE_RICH
 203         m_windowStyle |= wxTE_RICH;
 204     }
 205
 206     // we need to load the richedit DLL before creating the rich edit control
 207     if ( m_windowStyle & wxTE_RICH )
 208     {
 209         static bool s_errorGiven = FALSE;// MT-FIXME
 210
 211         // Which version do we need? Use 1.0 by default because it is much more
 212         // like the the standard EDIT or 2.0 if explicitly requested, but use
 213         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 214         //
 215         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 216         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 217         //       should use 3.0 if available as it is the best of both worlds -
 218         //       but as I can't test it right now I don't do it (VZ)
 219 #if wxUSE_UNICODE
 220         const int verRichEdit = 2;
 221 #else // !wxUSE_UNICODE
 222         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 223 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 224
 225         // only give the error msg once if the DLL can't be loaded
 226         if ( !s_errorGiven )
 227         {
 228             // try to load the RichEdit DLL (will do nothing if already done)
 229             if ( !wxRichEditModule::Load(verRichEdit) )
 230             {
 231 #if !wxUSE_UNICODE
 232                 // try another version?
 233                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 234
 235                 if ( !wxRichEditModule::Load(verRichEdit) )
 236 #endif // wxUSE_UNICODE
 237                 {
 238                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 239
 240                     s_errorGiven = TRUE;
 241                 }
 242             }
 243         }
 244
 245         // have we managed to load any richedit version?
 246         if ( !s_errorGiven )
 247         {
 248             m_verRichEdit = verRichEdit;
 249             if ( m_verRichEdit == 1 )
 250             {
 251                 windowClass = wxT("RICHEDIT");
 252             }
 253             else
 254             {
 255 #ifndef RICHEDIT_CLASS
 256                 wxString RICHEDIT_CLASS;
 257                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 258 #if wxUSE_UNICODE
 259                 RICHEDIT_CLASS += _T('W');
 260 #else // ANSI
 261                 RICHEDIT_CLASS += _T('A');
 262 #endif // Unicode/ANSI
 263 #endif // !RICHEDIT_CLASS
 264
 265                 windowClass = RICHEDIT_CLASS;
 266             }
 267         }
 268     }
 269 #endif // wxUSE_RICHEDIT
 270
 271     // we need to turn '\n's into "\r\n"s for the multiline controls
 272     wxString valueWin;
 273     if ( m_windowStyle & wxTE_MULTILINE )
 274     {
 275         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 276     }
 277     else // single line
 278     {
 279         valueWin = value;
 280     }
 281
 282     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 283         return FALSE;
 284
 285     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 286
 287 #if wxUSE_RICHEDIT
 288     if ( IsRich() )
 289     {
 290         // enable the events we're interested in: we want to get EN_CHANGE as
 291         // for the normal controls
 292         LPARAM mask = ENM_CHANGE;
 293
 294         if ( GetRichVersion() == 1 )
 295         {
 296             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 297             // explained in its handler
 298            mask |= ENM_MOUSEEVENTS;
 299         }
 300         else if ( m_windowStyle & wxTE_AUTO_URL )
 301         {
 302             mask |= ENM_LINK;
 303
 304             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 305         }
 306
 307         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 308     }
 309 #endif // wxUSE_RICHEDIT
 310
 311     return TRUE;
 312 }
 313
 314 // Make sure the window style (etc.) reflects the HWND style (roughly)
 315 void wxTextCtrl::AdoptAttributesFromHWND()
 316 {
 317     wxWindow::AdoptAttributesFromHWND();
 318
 319     HWND hWnd = GetHwnd();
 320     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 321
 322     // retrieve the style to see whether this is an edit or richedit ctrl
 323 #if wxUSE_RICHEDIT
 324     wxString classname = wxGetWindowClass(GetHWND());
 325
 326     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 327     {
 328         m_verRichEdit = 0;
 329     }
 330     else // rich edit?
 331     {
 332         wxChar c;
 333         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 334         {
 335             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 336
 337             m_verRichEdit = 0;
 338         }
 339     }
 340 #endif // wxUSE_RICHEDIT
 341
 342     if (style & ES_MULTILINE)
 343         m_windowStyle |= wxTE_MULTILINE;
 344     if (style & ES_PASSWORD)
 345         m_windowStyle |= wxTE_PASSWORD;
 346     if (style & ES_READONLY)
 347         m_windowStyle |= wxTE_READONLY;
 348     if (style & ES_WANTRETURN)
 349         m_windowStyle |= wxTE_PROCESS_ENTER;
 350     if (style & ES_CENTER)
 351         m_windowStyle |= wxTE_CENTRE;
 352     if (style & ES_RIGHT)
 353         m_windowStyle |= wxTE_RIGHT;
 354 }
 355
 356 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 357 {
 358     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 359
 360     // styles which we alaways add by default
 361     if ( style & wxTE_MULTILINE )
 362     {
 363         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 364                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 365
 366         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 367         if ( !(style & wxTE_NO_VSCROLL) )
 368         {
 369             // always adjust the vertical scrollbar automatically if we have it
 370             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 371
 372 #if wxUSE_RICHEDIT
 373             // we have to use this style for the rich edit controls because
 374             // without it the vertical scrollbar never appears at all in
 375             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 376             if ( style & wxTE_RICH2 )
 377             {
 378                 msStyle |= ES_DISABLENOSCROLL;
 379             }
 380 #endif // wxUSE_RICHEDIT
 381         }
 382
 383         style |= wxTE_PROCESS_ENTER;
 384     }
 385     else // !multiline
 386     {
 387         // there is really no reason to not have this style for single line
 388         // text controls
 389         msStyle |= ES_AUTOHSCROLL;
 390     }
 391
 392     // styles which we add depending on the specified wxWindows styles
 393     if ( style & wxHSCROLL )
 394     {
 395         // automatically scroll the control horizontally as necessary
 396         msStyle |= WS_HSCROLL;// | ES_AUTOHSCROLL;
 397     }
 398
 399     if ( style & wxTE_READONLY )
 400         msStyle |= ES_READONLY;
 401
 402     if ( style & wxTE_PASSWORD )
 403         msStyle |= ES_PASSWORD;
 404
 405     if ( style & wxTE_NOHIDESEL )
 406         msStyle |= ES_NOHIDESEL;
 407
 408     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 409     if ( style & wxTE_CENTRE )
 410         msStyle |= ES_CENTER;
 411     else if ( style & wxTE_RIGHT )
 412         msStyle |= ES_RIGHT;
 413     else
 414         msStyle |= ES_LEFT; // ES_LEFT if 0 as well but for consistency...
 415
 416     return msStyle;
 417 }
 418
 419 void wxTextCtrl::SetWindowStyleFlag(long style)
 420 {
 421 #if wxUSE_RICHEDIT
 422     // we have to deal with some styles separately because they can't be
 423     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 424     // using richedit-specific EM_SETOPTIONS
 425     if ( IsRich() &&
 426             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 427     {
 428         bool set = (style & wxTE_NOHIDESEL) != 0;
 429
 430         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 431                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 432     }
 433 #endif // wxUSE_RICHEDIT
 434
 435     wxControl::SetWindowStyleFlag(style);
 436 }
 437
 438 // ----------------------------------------------------------------------------
 439 // set/get the controls text
 440 // ----------------------------------------------------------------------------
 441
 442 wxString wxTextCtrl::GetValue() const
 443 {
 444     // range 0..-1 is special for GetRange() and means to retrieve all text
 445     return GetRange(0, -1);
 446 }
 447
 448 wxString wxTextCtrl::GetRange(long from, long to) const
 449 {
 450     wxString str;
 451
 452     if ( from >= to && to != -1 )
 453     {
 454         // nothing to retrieve
 455         return str;
 456     }
 457
 458 #if wxUSE_RICHEDIT
 459     if ( IsRich() )
 460     {
 461         int len = GetWindowTextLength(GetHwnd());
 462         if ( len > from )
 463         {
 464             // alloc one extra WORD as needed by the control
 465             wxChar *p = str.GetWriteBuf(++len);
 466
 467             TEXTRANGE textRange;
 468             textRange.chrg.cpMin = from;
 469             textRange.chrg.cpMax = to == -1 ? len : to;
 470             textRange.lpstrText = p;
 471
 472             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 473
 474             if ( m_verRichEdit > 1 )
 475             {
 476                 // RichEdit 2.0 uses just CR ('\r') for the newlines which is
 477                 // neither Unix nor Windows style - convert it to something
 478                 // reasonable
 479                 for ( ; *p; p++ )
 480                 {
 481                     if ( *p == _T('\r') )
 482                         *p = _T('\n');
 483                 }
 484             }
 485
 486             str.UngetWriteBuf();
 487
 488             if ( m_verRichEdit == 1 )
 489             {
 490                 // convert to the canonical form - see comment below
 491                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 492             }
 493         }
 494         //else: no text at all, leave the string empty
 495     }
 496     else
 497 #endif // wxUSE_RICHEDIT
 498     {
 499         // retrieve all text
 500         str = wxGetWindowText(GetHWND());
 501
 502         // need only a range?
 503         if ( from < to )
 504         {
 505             str = str.Mid(from, to - from);
 506         }
 507
 508         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 509         // canonical one (same one as above) for consistency with the other kinds
 510         // of controls and, more importantly, with the other ports
 511         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 512     }
 513
 514     return str;
 515 }
 516
 517 void wxTextCtrl::SetValue(const wxString& value)
 518 {
 519     // if the text is long enough, it's faster to just set it instead of first
 520     // comparing it with the old one (chances are that it will be different
 521     // anyhow, this comparison is there to avoid flicker for small single-line
 522     // edit controls mostly)
 523     if ( (value.length() > 0x400) || (value != GetValue()) )
 524     {
 525         DoWriteText(value, FALSE /* not selection only */);
 526     }
 527
 528     // we should reset the modified flag even if the value didn't really change
 529
 530     // mark the control as being not dirty - we changed its text, not the
 531     // user
 532     DiscardEdits();
 533
 534     // for compatibility, don't move the cursor when doing SetValue()
 535     SetInsertionPoint(0);
 536 }
 537
 538 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 539
 540 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 541 {
 542     *pcb = 0;
 543
 544     wchar_t *wbuf = (wchar_t *)buf;
 545     const wchar_t *wpc = *(const wchar_t **)dwCookie;
 546     while ( cb && *wpc )
 547     {
 548         *wbuf++ = *wpc++;
 549
 550         cb -= sizeof(wchar_t);
 551         (*pcb) += sizeof(wchar_t);
 552     }
 553
 554     *(const wchar_t **)dwCookie = wpc;
 555
 556     return 0;
 557 }
 558
 559 // from utils.cpp
 560 extern WXDLLIMPEXP_BASE long wxEncodingToCodepage(wxFontEncoding encoding);
 561
 562 #if wxUSE_UNICODE_MSLU
 563 bool wxTextCtrl::StreamIn(const wxString& value,
 564                           wxFontEncoding WXUNUSED(encoding),
 565                           bool selectionOnly)
 566 {
 567     const wchar_t *wpc = value.c_str();
 568 #else // !wxUSE_UNICODE_MSLU
 569 bool wxTextCtrl::StreamIn(const wxString& value,
 570                           wxFontEncoding encoding,
 571                           bool selectionOnly)
 572 {
 573     // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
 574     // text in the non default charset -- otherwise it thinks it knows better
 575     // than we do and always shows it in the default one
 576
 577     // first get the Windows code page for this encoding
 578     long codepage = wxEncodingToCodepage(encoding);
 579     if ( codepage == -1 )
 580     {
 581         // unknown encoding
 582         return FALSE;
 583     }
 584
 585     // next translate to Unicode using this code page
 586     int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
 587
 588 #if wxUSE_WCHAR_T
 589     wxWCharBuffer wchBuf(len);
 590 #else
 591     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 592 #endif
 593
 594     if ( !::MultiByteToWideChar(codepage, 0, value, -1,
 595                                 (wchar_t *)(const wchar_t *)wchBuf, len) )
 596     {
 597         wxLogLastError(_T("MultiByteToWideChar"));
 598     }
 599
 600     // finally, stream it in the control
 601     const wchar_t *wpc = wchBuf;
 602 #endif // wxUSE_UNICODE_MSLU
 603
 604     EDITSTREAM eds;
 605     wxZeroMemory(eds);
 606     eds.dwCookie = (DWORD)&wpc;
 607     // the cast below is needed for broken (very) old mingw32 headers
 608     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 609
 610     // we're going to receive 2 EN_CHANGE notifications if we got any selection
 611     // (same problem as in DoWriteText())
 612     if ( selectionOnly && HasSelection() )
 613     {
 614         // so suppress one of them
 615         m_suppressNextUpdate = TRUE;
 616     }
 617
 618     ::SendMessage(GetHwnd(), EM_STREAMIN,
 619                   SF_TEXT |
 620                   SF_UNICODE |
 621                   (selectionOnly ? SFF_SELECTION : 0),
 622                   (LPARAM)&eds);
 623
 624     if ( eds.dwError )
 625     {
 626         wxLogLastError(_T("EM_STREAMIN"));
 627     }
 628
 629 #if !wxUSE_WCHAR_T
 630     free(wchBuf);
 631 #endif // !wxUSE_WCHAR_T
 632
 633     return TRUE;
 634 }
 635
 636 #endif // wxUSE_RICHEDIT
 637
 638 void wxTextCtrl::WriteText(const wxString& value)
 639 {
 640     DoWriteText(value);
 641 }
 642
 643 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 644 {
 645     wxString valueDos;
 646     if ( m_windowStyle & wxTE_MULTILINE )
 647         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 648     else
 649         valueDos = value;
 650
 651 #if wxUSE_RICHEDIT
 652     // there are several complications with the rich edit controls here
 653     bool done = FALSE;
 654     if ( IsRich() )
 655     {
 656         // first, ensure that the new text will be in the default style
 657         if ( !m_defaultStyle.IsDefault() )
 658         {
 659             long start, end;
 660             GetSelection(&start, &end);
 661             SetStyle(start, end, m_defaultStyle);
 662         }
 663
 664 #if wxUSE_UNICODE_MSLU
 665         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 666         // but EM_STREAMIN works
 667         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 668         {
 669            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 670         }
 671 #endif // wxUSE_UNICODE_MSLU
 672
 673 #if !wxUSE_UNICODE
 674         // next check if the text we're inserting must be shown in a non
 675         // default charset -- this only works for RichEdit > 1.0
 676         if ( GetRichVersion() > 1 )
 677         {
 678             wxFont font = m_defaultStyle.GetFont();
 679             if ( !font.Ok() )
 680                 font = GetFont();
 681
 682             if ( font.Ok() )
 683             {
 684                wxFontEncoding encoding = font.GetEncoding();
 685                if ( encoding != wxFONTENCODING_SYSTEM )
 686                {
 687                    done = StreamIn(valueDos, encoding, selectionOnly);
 688                }
 689             }
 690         }
 691 #endif // !wxUSE_UNICODE
 692     }
 693
 694     if ( !done )
 695 #endif // wxUSE_RICHEDIT
 696     {
 697         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
 698         // call below which is confusing for the client code and so should be
 699         // avoided
 700         //
 701         // these cases are: (a) plain EDIT controls if EM_REPLACESEL is used
 702         // and there is a non empty selection currently and (b) rich text
 703         // controls in any case
 704         if (
 705 #if wxUSE_RICHEDIT
 706             IsRich() ||
 707 #endif // wxUSE_RICHEDIT
 708             (selectionOnly && HasSelection()) )
 709         {
 710             m_suppressNextUpdate = TRUE;
 711         }
 712
 713         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 714                       0, (LPARAM)valueDos.c_str());
 715
 716         // OTOH, non rich text controls don't generate any events at all when
 717         // we use WM_SETTEXT -- have to emulate them here
 718         if ( !selectionOnly
 719 #if wxUSE_RICHEDIT
 720                 && !IsRich()
 721 #endif // wxUSE_RICHEDIT
 722            )
 723         {
 724             // Windows already sends an update event for single-line
 725             // controls.
 726             if ( m_windowStyle & wxTE_MULTILINE )
 727                 SendUpdateEvent();
 728         }
 729     }
 730
 731     AdjustSpaceLimit();
 732 }
 733
 734 void wxTextCtrl::AppendText(const wxString& text)
 735 {
 736     SetInsertionPointEnd();
 737
 738     WriteText(text);
 739
 740 #if wxUSE_RICHEDIT
 741     if ( IsMultiLine() && GetRichVersion() > 1 )
 742     {
 743         // setting the caret to the end and showing it simply doesn't work for
 744         // RichEdit 2.0 -- force it to still do what we want
 745         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
 746     }
 747 #endif // wxUSE_RICHEDIT
 748 }
 749
 750 void wxTextCtrl::Clear()
 751 {
 752     ::SetWindowText(GetHwnd(), wxEmptyString);
 753
 754 #if wxUSE_RICHEDIT
 755     if ( !IsRich() )
 756 #endif // wxUSE_RICHEDIT
 757     {
 758         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 759         // but the normal ones don't -- make Clear() behaviour consistent by
 760         // always sending this event
 761
 762         // Windows already sends an update event for single-line
 763         // controls.
 764         if ( m_windowStyle & wxTE_MULTILINE )
 765             SendUpdateEvent();
 766     }
 767 }
 768
 769 #ifdef __WIN32__
 770
 771 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 772 {
 773     SetFocus();
 774
 775     size_t lenOld = GetValue().length();
 776
 777     wxUint32 code = event.GetRawKeyCode();
 778     ::keybd_event(code, 0, 0 /* key press */, 0);
 779     ::keybd_event(code, 0, KEYEVENTF_KEYUP, 0);
 780
 781     // assume that any alphanumeric key changes the total number of characters
 782     // in the control - this should work in 99% of cases
 783     return GetValue().length() != lenOld;
 784 }
 785
 786 #endif // __WIN32__
 787
 788 // ----------------------------------------------------------------------------
 789 // Clipboard operations
 790 // ----------------------------------------------------------------------------
 791
 792 void wxTextCtrl::Copy()
 793 {
 794     if (CanCopy())
 795     {
 796         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
 797     }
 798 }
 799
 800 void wxTextCtrl::Cut()
 801 {
 802     if (CanCut())
 803     {
 804         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
 805     }
 806 }
 807
 808 void wxTextCtrl::Paste()
 809 {
 810     if (CanPaste())
 811     {
 812         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
 813     }
 814 }
 815
 816 bool wxTextCtrl::HasSelection() const
 817 {
 818     long from, to;
 819     GetSelection(&from, &to);
 820     return from != to;
 821 }
 822
 823 bool wxTextCtrl::CanCopy() const
 824 {
 825     // Can copy if there's a selection
 826     return HasSelection();
 827 }
 828
 829 bool wxTextCtrl::CanCut() const
 830 {
 831     return CanCopy() && IsEditable();
 832 }
 833
 834 bool wxTextCtrl::CanPaste() const
 835 {
 836     if ( !IsEditable() )
 837         return FALSE;
 838
 839 #if wxUSE_RICHEDIT
 840     if ( IsRich() )
 841     {
 842         UINT cf = 0; // 0 == any format
 843
 844         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 845     }
 846 #endif // wxUSE_RICHEDIT
 847
 848     // Standard edit control: check for straight text on clipboard
 849     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 850         return FALSE;
 851
 852     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 853     ::CloseClipboard();
 854
 855     return isTextAvailable;
 856 }
 857
 858 // ----------------------------------------------------------------------------
 859 // Accessors
 860 // ----------------------------------------------------------------------------
 861
 862 void wxTextCtrl::SetEditable(bool editable)
 863 {
 864     HWND hWnd = GetHwnd();
 865     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 866 }
 867
 868 void wxTextCtrl::SetInsertionPoint(long pos)
 869 {
 870     DoSetSelection(pos, pos);
 871 }
 872
 873 void wxTextCtrl::SetInsertionPointEnd()
 874 {
 875     // we must not do anything if the caret is already there because calling
 876     // SetInsertionPoint() thaws the controls if Freeze() had been called even
 877     // if it doesn't actually move the caret anywhere and so the simple fact of
 878     // doing it results in horrible flicker when appending big amounts of text
 879     // to the control in a few chunks (see DoAddText() test in the text sample)
 880     if ( GetInsertionPoint() == GetLastPosition() )
 881         return;
 882
 883     long pos;
 884
 885 #if wxUSE_RICHEDIT
 886     if ( m_verRichEdit == 1 )
 887     {
 888         // we don't have to waste time calling GetLastPosition() in this case
 889         pos = -1;
 890     }
 891     else // !RichEdit 1.0
 892 #endif // wxUSE_RICHEDIT
 893     {
 894         pos = GetLastPosition();
 895     }
 896
 897     SetInsertionPoint(pos);
 898 }
 899
 900 long wxTextCtrl::GetInsertionPoint() const
 901 {
 902 #if wxUSE_RICHEDIT
 903     if ( IsRich() )
 904     {
 905         CHARRANGE range;
 906         range.cpMin = 0;
 907         range.cpMax = 0;
 908         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 909         return range.cpMin;
 910     }
 911 #endif // wxUSE_RICHEDIT
 912
 913     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 914     return Pos & 0xFFFF;
 915 }
 916
 917 long wxTextCtrl::GetLastPosition() const
 918 {
 919     int numLines = GetNumberOfLines();
 920     long posStartLastLine = XYToPosition(0, numLines - 1);
 921
 922     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
 923
 924     return posStartLastLine + lenLastLine;
 925 }
 926
 927 // If the return values from and to are the same, there is no
 928 // selection.
 929 void wxTextCtrl::GetSelection(long* from, long* to) const
 930 {
 931 #if wxUSE_RICHEDIT
 932     if ( IsRich() )
 933     {
 934         CHARRANGE charRange;
 935         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 936
 937         *from = charRange.cpMin;
 938         *to = charRange.cpMax;
 939     }
 940     else
 941 #endif // !wxUSE_RICHEDIT
 942     {
 943         DWORD dwStart, dwEnd;
 944         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 945
 946         *from = dwStart;
 947         *to = dwEnd;
 948     }
 949 }
 950
 951 bool wxTextCtrl::IsEditable() const
 952 {
 953     // strangely enough, we may be called before the control is created: our
 954     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
 955     // us
 956     if ( !m_hWnd )
 957         return TRUE;
 958
 959     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 960
 961     return (style & ES_READONLY) == 0;
 962 }
 963
 964 // ----------------------------------------------------------------------------
 965 // selection
 966 // ----------------------------------------------------------------------------
 967
 968 void wxTextCtrl::SetSelection(long from, long to)
 969 {
 970     // if from and to are both -1, it means (in wxWindows) that all text should
 971     // be selected - translate into Windows convention
 972     if ( (from == -1) && (to == -1) )
 973     {
 974         from = 0;
 975         to = -1;
 976     }
 977
 978     DoSetSelection(from, to);
 979 }
 980
 981 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 982 {
 983     HWND hWnd = GetHwnd();
 984
 985 #ifdef __WIN32__
 986 #if wxUSE_RICHEDIT
 987     if ( IsRich() )
 988     {
 989         CHARRANGE range;
 990         range.cpMin = from;
 991         range.cpMax = to;
 992         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 993     }
 994     else
 995 #endif // wxUSE_RICHEDIT
 996     {
 997         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
 998     }
 999
1000     if ( scrollCaret )
1001     {
1002 #if wxUSE_RICHEDIT
1003         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1004         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1005         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1006         // option is set (but it does work ok in richedit 1.0 mode...)
1007         //
1008         // so to make it work we either need to give focus to it here which
1009         // will probably create many problems (dummy focus events; window
1010         // containing the text control being brought to foreground
1011         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1012         // create other problems too -- and in fact it does because if we turn
1013         // on/off this style while appending the text to the control, the
1014         // vertical scrollbar never appears in it even if we append tons of
1015         // text and to work around this the only solution I found was to use
1016         // ES_DISABLENOSCROLL
1017         //
1018         // this is very ugly but I don't see any other way to make this work
1019         if ( GetRichVersion() > 1 )
1020         {
1021             if ( !HasFlag(wxTE_NOHIDESEL) )
1022             {
1023                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1024                               ECOOP_OR, ECO_NOHIDESEL);
1025             }
1026             //else: everything is already ok
1027         }
1028 #endif // wxUSE_RICHEDIT
1029
1030         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1031
1032 #if wxUSE_RICHEDIT
1033         // restore ECO_NOHIDESEL if we changed it
1034         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1035         {
1036             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1037                           ECOOP_AND, ~ECO_NOHIDESEL);
1038         }
1039 #endif // wxUSE_RICHEDIT
1040     }
1041 #else // Win16
1042     // WPARAM is 0: selection is scrolled into view
1043     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
1044 #endif // Win32/16
1045 }
1046
1047 // ----------------------------------------------------------------------------
1048 // Editing
1049 // ----------------------------------------------------------------------------
1050
1051 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1052 {
1053     // Set selection and remove it
1054     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
1055
1056     SendMessage(GetHwnd(), EM_REPLACESEL,
1057 #ifdef __WIN32__
1058                 TRUE,
1059 #else
1060                 FALSE,
1061 #endif
1062                 (LPARAM)value.c_str());
1063 }
1064
1065 void wxTextCtrl::Remove(long from, long to)
1066 {
1067     Replace(from, to, wxEmptyString);
1068 }
1069
1070 bool wxTextCtrl::LoadFile(const wxString& file)
1071 {
1072     if ( wxTextCtrlBase::LoadFile(file) )
1073     {
1074         // update the size limit if needed
1075         AdjustSpaceLimit();
1076
1077         return TRUE;
1078     }
1079
1080     return FALSE;
1081 }
1082
1083 bool wxTextCtrl::IsModified() const
1084 {
1085     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1086 }
1087
1088 // Makes 'unmodified'
1089 void wxTextCtrl::DiscardEdits()
1090 {
1091     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1092 }
1093
1094 int wxTextCtrl::GetNumberOfLines() const
1095 {
1096     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1097 }
1098
1099 long wxTextCtrl::XYToPosition(long x, long y) const
1100 {
1101     // This gets the char index for the _beginning_ of this line
1102     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1103
1104     return charIndex + x;
1105 }
1106
1107 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1108 {
1109     HWND hWnd = GetHwnd();
1110
1111     // This gets the line number containing the character
1112     long lineNo;
1113 #if wxUSE_RICHEDIT
1114     if ( IsRich() )
1115     {
1116         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1117     }
1118     else
1119 #endif // wxUSE_RICHEDIT
1120     {
1121         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1122     }
1123
1124     if ( lineNo == -1 )
1125     {
1126         // no such line
1127         return FALSE;
1128     }
1129
1130     // This gets the char index for the _beginning_ of this line
1131     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1132     if ( charIndex == -1 )
1133     {
1134         return FALSE;
1135     }
1136
1137     // The X position must therefore be the different between pos and charIndex
1138     if ( x )
1139         *x = pos - charIndex;
1140     if ( y )
1141         *y = lineNo;
1142
1143     return TRUE;
1144 }
1145
1146 void wxTextCtrl::ShowPosition(long pos)
1147 {
1148     HWND hWnd = GetHwnd();
1149
1150     // To scroll to a position, we pass the number of lines and characters
1151     // to scroll *by*. This means that we need to:
1152     // (1) Find the line position of the current line.
1153     // (2) Find the line position of pos.
1154     // (3) Scroll by (pos - current).
1155     // For now, ignore the horizontal scrolling.
1156
1157     // Is this where scrolling is relative to - the line containing the caret?
1158     // Or is the first visible line??? Try first visible line.
1159 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1160
1161     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1162
1163     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1164
1165     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1166
1167     if (linesToScroll != 0)
1168       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1169 }
1170
1171 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1172 {
1173     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1174 }
1175
1176 int wxTextCtrl::GetLineLength(long lineNo) const
1177 {
1178     long pos = XYToPosition(0, lineNo);
1179
1180     return GetLengthOfLineContainingPos(pos);
1181 }
1182
1183 wxString wxTextCtrl::GetLineText(long lineNo) const
1184 {
1185     size_t len = (size_t)GetLineLength(lineNo) + 1;
1186
1187     // there must be at least enough place for the length WORD in the
1188     // buffer
1189     len += sizeof(WORD);
1190
1191     wxString str;
1192     wxChar *buf = str.GetWriteBuf(len);
1193
1194     *(WORD *)buf = (WORD)len;
1195     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1196     buf[len] = 0;
1197
1198     str.UngetWriteBuf(len);
1199
1200     return str;
1201 }
1202
1203 void wxTextCtrl::SetMaxLength(unsigned long len)
1204 {
1205     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1206 }
1207
1208 // ----------------------------------------------------------------------------
1209 // Undo/redo
1210 // ----------------------------------------------------------------------------
1211
1212 void wxTextCtrl::Undo()
1213 {
1214     if (CanUndo())
1215     {
1216         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1217     }
1218 }
1219
1220 void wxTextCtrl::Redo()
1221 {
1222     if (CanRedo())
1223     {
1224         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1225         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1226     }
1227 }
1228
1229 bool wxTextCtrl::CanUndo() const
1230 {
1231     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1232 }
1233
1234 bool wxTextCtrl::CanRedo() const
1235 {
1236     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1237 }
1238
1239 // ----------------------------------------------------------------------------
1240 // implemenation details
1241 // ----------------------------------------------------------------------------
1242
1243 void wxTextCtrl::Command(wxCommandEvent & event)
1244 {
1245     SetValue(event.GetString());
1246     ProcessCommand (event);
1247 }
1248
1249 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1250 {
1251     // By default, load the first file into the text window.
1252     if (event.GetNumberOfFiles() > 0)
1253     {
1254         LoadFile(event.GetFiles()[0]);
1255     }
1256 }
1257
1258 // ----------------------------------------------------------------------------
1259 // kbd input processing
1260 // ----------------------------------------------------------------------------
1261
1262 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1263 {
1264     MSG *msg = (MSG *)pMsg;
1265
1266     // check for our special keys here: if we don't do it and the parent frame
1267     // uses them as accelerators, they wouldn't work at all, so we disable
1268     // usual preprocessing for them
1269     if ( msg->message == WM_KEYDOWN )
1270     {
1271         WORD vkey = (WORD) msg->wParam;
1272         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1273         {
1274             if ( vkey == VK_BACK )
1275                 return FALSE;
1276         }
1277         else // no Alt
1278         {
1279             // we want to process some Ctrl-foo and Shift-bar but no key
1280             // combinations without either Ctrl or Shift nor with both of them
1281             // pressed
1282             const int ctrl = wxIsCtrlDown(),
1283                       shift = wxIsShiftDown();
1284             switch ( ctrl + shift )
1285             {
1286                 default:
1287                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1288                     // fall through
1289
1290                 case 0:
1291                 case 2:
1292                     break;
1293
1294                 case 1:
1295                     // either Ctrl or Shift pressed
1296                     if ( ctrl )
1297                     {
1298                         switch ( vkey )
1299                         {
1300                             case 'C':
1301                             case 'V':
1302                             case 'X':
1303                             case VK_INSERT:
1304                             case VK_DELETE:
1305                             case VK_HOME:
1306                             case VK_END:
1307                                 return FALSE;
1308                         }
1309                     }
1310                     else // Shift is pressed
1311                     {
1312                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1313                             return FALSE;
1314                     }
1315             }
1316         }
1317     }
1318
1319     return wxControl::MSWShouldPreProcessMessage(pMsg);
1320 }
1321
1322 void wxTextCtrl::OnChar(wxKeyEvent& event)
1323 {
1324     switch ( event.GetKeyCode() )
1325     {
1326         case WXK_RETURN:
1327             if ( !(m_windowStyle & wxTE_MULTILINE) )
1328             {
1329                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1330                 InitCommandEvent(event);
1331                 event.SetString(GetValue());
1332                 if ( GetEventHandler()->ProcessEvent(event) )
1333                     return;
1334             }
1335             //else: multiline controls need Enter for themselves
1336
1337             break;
1338
1339         case WXK_TAB:
1340             // always produce navigation event - even if we process TAB
1341             // ourselves the fact that we got here means that the user code
1342             // decided to skip processing of this TAB - probably to let it
1343             // do its default job.
1344             {
1345                 wxNavigationKeyEvent eventNav;
1346                 eventNav.SetDirection(!event.ShiftDown());
1347                 eventNav.SetWindowChange(event.ControlDown());
1348                 eventNav.SetEventObject(this);
1349
1350                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1351                     return;
1352             }
1353             break;
1354     }
1355
1356     // no, we didn't process it
1357     event.Skip();
1358 }
1359
1360 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1361 {
1362     long lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1363
1364     if ( nMsg == WM_GETDLGCODE )
1365     {
1366         // we always want the chars and the arrows: the arrows for navigation
1367         // and the chars because we want Ctrl-C to work even in a read only
1368         // control
1369         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1370
1371         if ( IsEditable() )
1372         {
1373             // we may have several different cases:
1374             // 1. normal case: both TAB and ENTER are used for dlg navigation
1375             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1376             //    next control in the dialog
1377             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1378             //    navigation
1379             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1380             //    to the next control
1381
1382             // the multiline edit control should always get <Return> for itself
1383             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1384                 lDlgCode |= DLGC_WANTMESSAGE;
1385
1386             if ( HasFlag(wxTE_PROCESS_TAB) )
1387                 lDlgCode |= DLGC_WANTTAB;
1388
1389             lRc |= lDlgCode;
1390         }
1391         else // !editable
1392         {
1393             // NB: use "=", not "|=" as the base class version returns the
1394             //     same flags is this state as usual (i.e. including
1395             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1396             //     native Win32 apps?) but for now live with it.
1397             lRc = lDlgCode;
1398         }
1399     }
1400
1401     return lRc;
1402 }
1403
1404 // ----------------------------------------------------------------------------
1405 // text control event processing
1406 // ----------------------------------------------------------------------------
1407
1408 bool wxTextCtrl::SendUpdateEvent()
1409 {
1410     // is event reporting suspended?
1411     if ( m_suppressNextUpdate )
1412     {
1413         // do process the next one
1414         m_suppressNextUpdate = FALSE;
1415
1416         return FALSE;
1417     }
1418
1419     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1420     InitCommandEvent(event);
1421     event.SetString(GetValue());
1422
1423     return ProcessCommand(event);
1424 }
1425
1426 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1427 {
1428     switch ( param )
1429     {
1430         case EN_SETFOCUS:
1431         case EN_KILLFOCUS:
1432             {
1433                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1434                                                          : wxEVT_SET_FOCUS,
1435                                    m_windowId);
1436                 event.SetEventObject(this);
1437                 GetEventHandler()->ProcessEvent(event);
1438             }
1439             break;
1440
1441         case EN_CHANGE:
1442             SendUpdateEvent();
1443             break;
1444
1445         case EN_MAXTEXT:
1446             // the text size limit has been hit -- try to increase it
1447             if ( !AdjustSpaceLimit() )
1448             {
1449                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1450                 InitCommandEvent(event);
1451                 event.SetString(GetValue());
1452                 ProcessCommand(event);
1453             }
1454             break;
1455
1456             // the other edit notification messages are not processed
1457         default:
1458             return FALSE;
1459     }
1460
1461     // processed
1462     return TRUE;
1463 }
1464
1465 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1466 #if wxUSE_CTL3D
1467                                WXUINT message,
1468                                WXWPARAM wParam,
1469                                WXLPARAM lParam
1470 #else
1471                                WXUINT WXUNUSED(message),
1472                                WXWPARAM WXUNUSED(wParam),
1473                                WXLPARAM WXUNUSED(lParam)
1474 #endif
1475     )
1476 {
1477 #if wxUSE_CTL3D
1478     if ( m_useCtl3D )
1479     {
1480         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1481         return (WXHBRUSH) hbrush;
1482     }
1483 #endif // wxUSE_CTL3D
1484
1485     HDC hdc = (HDC)pDC;
1486     wxColour colBack = GetBackgroundColour();
1487
1488     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1489         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1490
1491     ::SetBkColor(hdc, wxColourToRGB(colBack));
1492     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1493
1494     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1495
1496     return (WXHBRUSH)brush->GetResourceHandle();
1497 }
1498
1499 // In WIN16, need to override normal erasing because
1500 // Ctl3D doesn't use the wxWindows background colour.
1501 #ifdef __WIN16__
1502 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1503 {
1504     wxColour col(m_backgroundColour);
1505
1506 #if wxUSE_CTL3D
1507     if (m_useCtl3D)
1508         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1509 #endif
1510
1511     RECT rect;
1512     ::GetClientRect(GetHwnd(), &rect);
1513
1514     COLORREF ref = wxColourToRGB(col);
1515     HBRUSH hBrush = ::CreateSolidBrush(ref);
1516     if ( !hBrush )
1517         wxLogLastError(wxT("CreateSolidBrush"));
1518
1519     HDC hdc = (HDC)event.GetDC()->GetHDC();
1520
1521     int mode = ::SetMapMode(hdc, MM_TEXT);
1522
1523     ::FillRect(hdc, &rect, hBrush);
1524     ::DeleteObject(hBrush);
1525     ::SetMapMode(hdc, mode);
1526
1527 }
1528 #endif // Win16
1529
1530 bool wxTextCtrl::AdjustSpaceLimit()
1531 {
1532 #ifndef __WIN16__
1533     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1534
1535     // HACK: we try to automatically extend the limit for the amount of text
1536     //       to allow (interactively) entering more than 64Kb of text under
1537     //       Win9x but we shouldn't reset the text limit which was previously
1538     //       set explicitly with SetMaxLength()
1539     //
1540     //       we could solve this by storing the limit we set in wxTextCtrl but
1541     //       to save space we prefer to simply test here the actual limit
1542     //       value: we consider that SetMaxLength() can only be called for
1543     //       values < 32Kb
1544     if ( limit < 0x8000 )
1545     {
1546         // we've got more text than limit set by SetMaxLength()
1547         return FALSE;
1548     }
1549
1550     unsigned int len = ::GetWindowTextLength(GetHwnd());
1551     if ( len >= limit )
1552     {
1553         limit = len + 0x8000;    // 32Kb
1554
1555 #if wxUSE_RICHEDIT
1556         if ( IsRich() )
1557         {
1558             // as a nice side effect, this also allows passing limit > 64Kb
1559             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1560         }
1561         else
1562 #endif // wxUSE_RICHEDIT
1563         {
1564             if ( limit > 0xffff )
1565             {
1566                 // this will set it to a platform-dependent maximum (much more
1567                 // than 64Kb under NT)
1568                 limit = 0;
1569             }
1570
1571             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1572         }
1573     }
1574 #endif // !Win16
1575
1576     // we changed the limit
1577     return TRUE;
1578 }
1579
1580 bool wxTextCtrl::AcceptsFocus() const
1581 {
1582     // we don't want focus if we can't be edited unless we're a multiline
1583     // control because then it might be still nice to get focus from keyboard
1584     // to be able to scroll it without mouse
1585     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1586 }
1587
1588 wxSize wxTextCtrl::DoGetBestSize() const
1589 {
1590     int cx, cy;
1591     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1592
1593     int wText = DEFAULT_ITEM_WIDTH;
1594
1595     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1596     if ( m_windowStyle & wxTE_MULTILINE )
1597     {
1598         hText *= wxMax(GetNumberOfLines(), 5);
1599     }
1600     //else: for single line control everything is ok
1601
1602     return wxSize(wText, hText);
1603 }
1604
1605 // ----------------------------------------------------------------------------
1606 // standard handlers for standard edit menu events
1607 // ----------------------------------------------------------------------------
1608
1609 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1610 {
1611     Cut();
1612 }
1613
1614 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1615 {
1616     Copy();
1617 }
1618
1619 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1620 {
1621     Paste();
1622 }
1623
1624 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1625 {
1626     Undo();
1627 }
1628
1629 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1630 {
1631     Redo();
1632 }
1633
1634 void wxTextCtrl::OnDelete(wxCommandEvent& event)
1635 {
1636     long from, to;
1637     GetSelection(& from, & to);
1638     if (from != -1 && to != -1)
1639         Remove(from, to);
1640 }
1641
1642 void wxTextCtrl::OnSelectAll(wxCommandEvent& event)
1643 {
1644     SetSelection(-1, -1);
1645 }
1646
1647 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1648 {
1649     event.Enable( CanCut() );
1650 }
1651
1652 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1653 {
1654     event.Enable( CanCopy() );
1655 }
1656
1657 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1658 {
1659     event.Enable( CanPaste() );
1660 }
1661
1662 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1663 {
1664     event.Enable( CanUndo() );
1665 }
1666
1667 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1668 {
1669     event.Enable( CanRedo() );
1670 }
1671
1672 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
1673 {
1674     long from, to;
1675     GetSelection(& from, & to);
1676     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
1677 }
1678
1679 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
1680 {
1681     event.Enable(GetLastPosition() > 0);
1682 }
1683
1684 void wxTextCtrl::OnRightClick(wxMouseEvent& event)
1685 {
1686 #if wxUSE_RICHEDIT
1687     if (IsRich())
1688     {
1689         if (!m_privateContextMenu)
1690         {
1691             m_privateContextMenu = new wxMenu;
1692             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
1693             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
1694             m_privateContextMenu->AppendSeparator();
1695             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
1696             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
1697             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
1698             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
1699             m_privateContextMenu->AppendSeparator();
1700             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
1701         }
1702         PopupMenu(m_privateContextMenu, event.GetPosition());
1703         return;
1704     }
1705     else
1706 #endif
1707     event.Skip();
1708 }
1709
1710 // the rest of the file only deals with the rich edit controls
1711 #if wxUSE_RICHEDIT
1712
1713 // ----------------------------------------------------------------------------
1714 // EN_LINK processing
1715 // ----------------------------------------------------------------------------
1716
1717 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1718 {
1719     NMHDR *hdr = (NMHDR* )lParam;
1720     switch ( hdr->code )
1721     {
1722        case EN_MSGFILTER:
1723             {
1724                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
1725                 UINT msg = msgf->msg;
1726
1727                 // this is a bit crazy but richedit 1.0 sends us all mouse
1728                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
1729                 // generate the wxWin events for this message manually
1730                 //
1731                 // NB: in fact, this is still not totally correct as it does
1732                 //     send us WM_LBUTTONUP if the selection was cleared by the
1733                 //     last click -- so currently we get 2 events in this case,
1734                 //     but as I don't see any obvious way to check for this I
1735                 //     leave this code in place because it's still better than
1736                 //     not getting left up events at all
1737                 if ( msg == WM_LBUTTONUP )
1738                 {
1739                     WXUINT flags = msgf->wParam;
1740                     int x = GET_X_LPARAM(msgf->lParam),
1741                         y = GET_Y_LPARAM(msgf->lParam);
1742
1743                     HandleMouseEvent(msg, x, y, flags);
1744                 }
1745             }
1746
1747             // return TRUE to process the event (and FALSE to ignore it)
1748             return TRUE;
1749
1750         case EN_LINK:
1751             {
1752                 const ENLINK *enlink = (ENLINK *)hdr;
1753
1754                 switch ( enlink->msg )
1755                 {
1756                     case WM_SETCURSOR:
1757                         // ok, so it is hardcoded - do we really nee to
1758                         // customize it?
1759                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1760                         *result = TRUE;
1761                         break;
1762
1763                     case WM_MOUSEMOVE:
1764                     case WM_LBUTTONDOWN:
1765                     case WM_LBUTTONUP:
1766                     case WM_LBUTTONDBLCLK:
1767                     case WM_RBUTTONDOWN:
1768                     case WM_RBUTTONUP:
1769                     case WM_RBUTTONDBLCLK:
1770                         // send a mouse event
1771                         {
1772                             static const wxEventType eventsMouse[] =
1773                             {
1774                                 wxEVT_MOTION,
1775                                 wxEVT_LEFT_DOWN,
1776                                 wxEVT_LEFT_UP,
1777                                 wxEVT_LEFT_DCLICK,
1778                                 wxEVT_RIGHT_DOWN,
1779                                 wxEVT_RIGHT_UP,
1780                                 wxEVT_RIGHT_DCLICK,
1781                             };
1782
1783                             // the event ids are consecutive
1784                             wxMouseEvent
1785                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1786
1787                             InitMouseEvent(evtMouse,
1788                                            GET_X_LPARAM(enlink->lParam),
1789                                            GET_Y_LPARAM(enlink->lParam),
1790                                            enlink->wParam);
1791
1792                             wxTextUrlEvent event(m_windowId, evtMouse,
1793                                                  enlink->chrg.cpMin,
1794                                                  enlink->chrg.cpMax);
1795
1796                             InitCommandEvent(event);
1797
1798                             *result = ProcessCommand(event);
1799                         }
1800                         break;
1801                 }
1802             }
1803             return TRUE;
1804     }
1805
1806     // not processed, leave it to the base class
1807     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
1808 }
1809
1810 // ----------------------------------------------------------------------------
1811 // colour setting for the rich edit controls
1812 // ----------------------------------------------------------------------------
1813
1814 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1815 {
1816     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1817     {
1818         // colour didn't really change
1819         return FALSE;
1820     }
1821
1822     if ( IsRich() )
1823     {
1824         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1825         // EM_SETBKGNDCOLOR additionally
1826         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1827     }
1828
1829     return TRUE;
1830 }
1831
1832 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1833 {
1834     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1835     {
1836         // colour didn't really change
1837         return FALSE;
1838     }
1839
1840     if ( IsRich() )
1841     {
1842         // change the colour of everything
1843         CHARFORMAT cf;
1844         wxZeroMemory(cf);
1845         cf.cbSize = sizeof(cf);
1846         cf.dwMask = CFM_COLOR;
1847         cf.crTextColor = wxColourToRGB(colour);
1848         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1849     }
1850
1851     return TRUE;
1852 }
1853
1854 // ----------------------------------------------------------------------------
1855 // styling support for rich edit controls
1856 // ----------------------------------------------------------------------------
1857
1858 #if wxUSE_RICHEDIT
1859
1860 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1861 {
1862     if ( !IsRich() )
1863     {
1864         // can't do it with normal text control
1865         return FALSE;
1866     }
1867
1868     // the richedit 1.0 doesn't handle setting background colour, so don't
1869     // even try to do anything if it's the only thing we want to change
1870     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
1871         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
1872         !style.HasTabs() )
1873     {
1874         // nothing to do: return TRUE if there was really nothing to do and
1875         // FALSE if we failed to set bg colour
1876         return !style.HasBackgroundColour();
1877     }
1878
1879     // order the range if needed
1880     if ( start > end )
1881     {
1882         long tmp = start;
1883         start = end;
1884         end = tmp;
1885     }
1886
1887     // we can only change the format of the selection, so select the range we
1888     // want and restore the old selection later
1889     long startOld, endOld;
1890     GetSelection(&startOld, &endOld);
1891
1892     // but do we really have to change the selection?
1893     bool changeSel = start != startOld || end != endOld;
1894
1895     if ( changeSel )
1896     {
1897         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
1898     }
1899
1900     // initialize CHARFORMAT struct
1901 #if wxUSE_RICHEDIT2
1902     CHARFORMAT2 cf;
1903 #else
1904     CHARFORMAT cf;
1905 #endif
1906
1907     wxZeroMemory(cf);
1908
1909     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
1910     // CHARFORMAT in that case
1911 #if wxUSE_RICHEDIT2
1912     if ( m_verRichEdit == 1 )
1913     {
1914         // this is the only thing the control is going to grok
1915         cf.cbSize = sizeof(CHARFORMAT);
1916     }
1917     else
1918 #endif
1919     {
1920         // CHARFORMAT or CHARFORMAT2
1921         cf.cbSize = sizeof(cf);
1922     }
1923
1924     if ( style.HasFont() )
1925     {
1926         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1927         //     but using it doesn't seem to hurt neither so leaving it for now
1928
1929         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1930                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1931
1932         // fill in data from LOGFONT but recalculate lfHeight because we need
1933         // the real height in twips and not the negative number which
1934         // wxFillLogFont() returns (this is correct in general and works with
1935         // the Windows font mapper, but not here)
1936         LOGFONT lf;
1937         wxFillLogFont(&lf, &style.GetFont());
1938         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1939         cf.bCharSet = lf.lfCharSet;
1940         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1941         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1942
1943         // also deal with underline/italic/bold attributes: note that we must
1944         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1945         // style to allow clearing it
1946         if ( lf.lfItalic )
1947         {
1948             cf.dwEffects |= CFE_ITALIC;
1949         }
1950
1951         if ( lf.lfWeight == FW_BOLD )
1952         {
1953             cf.dwEffects |= CFE_BOLD;
1954         }
1955
1956         if ( lf.lfUnderline )
1957         {
1958             cf.dwEffects |= CFE_UNDERLINE;
1959         }
1960
1961         // strikeout fonts are not supported by wxWindows
1962     }
1963
1964     if ( style.HasTextColour() )
1965     {
1966         cf.dwMask |= CFM_COLOR;
1967         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1968     }
1969
1970 #if wxUSE_RICHEDIT2
1971     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
1972     {
1973         cf.dwMask |= CFM_BACKCOLOR;
1974         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1975     }
1976 #endif // wxUSE_RICHEDIT2
1977
1978     // do format the selection
1979     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1980                             SCF_SELECTION, (LPARAM)&cf) != 0;
1981     if ( !ok )
1982     {
1983         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1984     }
1985
1986     // now do the paragraph formatting
1987     PARAFORMAT2 pf;
1988     wxZeroMemory(pf);
1989     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
1990     // PARAFORMAT in that case
1991 #if wxUSE_RICHEDIT2
1992     if ( m_verRichEdit == 1 )
1993     {
1994         // this is the only thing the control is going to grok
1995         pf.cbSize = sizeof(PARAFORMAT);
1996     }
1997     else
1998 #endif
1999     {
2000         // PARAFORMAT or PARAFORMAT2
2001         pf.cbSize = sizeof(pf);
2002     }
2003
2004     if (style.HasAlignment())
2005     {
2006         pf.dwMask |= PFM_ALIGNMENT;
2007         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2008             pf.wAlignment = PFA_RIGHT;
2009         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2010             pf.wAlignment = PFA_CENTER;
2011         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2012             pf.wAlignment = PFA_JUSTIFY;
2013         else
2014             pf.wAlignment = PFA_LEFT;
2015     }
2016
2017     if (style.HasLeftIndent())
2018     {
2019         pf.dwMask |= PFM_STARTINDENT;
2020
2021         // Convert from 1/10 mm to TWIPS
2022         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2023
2024         // TODO: do we need to specify dxOffset?
2025     }
2026
2027     if (style.HasRightIndent())
2028     {
2029         pf.dwMask |= PFM_RIGHTINDENT;
2030
2031         // Convert from 1/10 mm to TWIPS
2032         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2033     }
2034
2035     if (style.HasTabs())
2036     {
2037         pf.dwMask |= PFM_TABSTOPS;
2038
2039         const wxArrayInt& tabs = style.GetTabs();
2040
2041         pf.cTabCount = wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2042         size_t i;
2043         for (i = 0; i < (size_t) pf.cTabCount; i++)
2044         {
2045             // Convert from 1/10 mm to TWIPS
2046             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2047         }
2048     }
2049
2050     if (pf.dwMask != 0)
2051     {
2052         // do format the selection
2053         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2054             0, (LPARAM) &pf) != 0;
2055         if ( !ok )
2056         {
2057             wxLogDebug(_T("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2058         }
2059     }
2060
2061     if ( changeSel )
2062     {
2063         // restore the original selection
2064         DoSetSelection(startOld, endOld, FALSE);
2065     }
2066
2067     return ok;
2068 }
2069
2070 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2071 {
2072     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2073         return FALSE;
2074
2075     // we have to do this or the style wouldn't apply for the text typed by the
2076     // user
2077     long posLast = GetLastPosition();
2078     SetStyle(posLast, posLast, m_defaultStyle);
2079
2080     return TRUE;
2081 }
2082
2083 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2084 {
2085     if ( !IsRich() )
2086     {
2087         // can't do it with normal text control
2088         return FALSE;
2089     }
2090
2091     // initialize CHARFORMAT struct
2092 #if wxUSE_RICHEDIT2
2093     CHARFORMAT2 cf;
2094 #else
2095     CHARFORMAT cf;
2096 #endif
2097
2098     wxZeroMemory(cf);
2099
2100     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2101     // CHARFORMAT in that case
2102 #if wxUSE_RICHEDIT2
2103     if ( m_verRichEdit == 1 )
2104     {
2105         // this is the only thing the control is going to grok
2106         cf.cbSize = sizeof(CHARFORMAT);
2107     }
2108     else
2109 #endif
2110     {
2111         // CHARFORMAT or CHARFORMAT2
2112         cf.cbSize = sizeof(cf);
2113     }
2114     // we can only change the format of the selection, so select the range we
2115     // want and restore the old selection later
2116     long startOld, endOld;
2117     GetSelection(&startOld, &endOld);
2118
2119     // but do we really have to change the selection?
2120     bool changeSel = position != startOld || position != endOld;
2121
2122     if ( changeSel )
2123     {
2124         DoSetSelection(position, position, FALSE /* don't scroll caret into view */);
2125     }
2126
2127     // get the selection formatting
2128     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2129                             SCF_SELECTION, (LPARAM)&cf) ;
2130
2131     LOGFONT lf;
2132     lf.lfHeight = cf.yHeight;
2133     lf.lfWidth = 0;
2134     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2135     lf.lfClipPrecision = 0;
2136     lf.lfEscapement = 0;
2137     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2138     if (cf.dwEffects & CFE_ITALIC)
2139         lf.lfItalic = TRUE;
2140     lf.lfOrientation = 0;
2141     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2142     lf.lfQuality = 0;
2143     if (cf.dwEffects & CFE_STRIKEOUT)
2144         lf.lfStrikeOut = TRUE;
2145     if (cf.dwEffects & CFE_UNDERLINE)
2146         lf.lfUnderline = TRUE;
2147     if (cf.dwEffects & CFE_BOLD)
2148         lf.lfWeight = FW_BOLD;
2149
2150     wxFont font = wxCreateFontFromLogFont(& lf);
2151     if (font.Ok())
2152     {
2153         style.SetFont(font);
2154     }
2155     style.SetTextColour(wxColour(cf.crTextColor));
2156
2157 #if wxUSE_RICHEDIT2
2158     if ( m_verRichEdit != 1 )
2159     {
2160         // cf.dwMask |= CFM_BACKCOLOR;
2161         style.SetBackgroundColour(wxColour(cf.crBackColor));
2162     }
2163 #endif // wxUSE_RICHEDIT2
2164
2165     // now get the paragraph formatting
2166     PARAFORMAT2 pf;
2167     wxZeroMemory(pf);
2168     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2169     // PARAFORMAT in that case
2170 #if wxUSE_RICHEDIT2
2171     if ( m_verRichEdit == 1 )
2172     {
2173         // this is the only thing the control is going to grok
2174         pf.cbSize = sizeof(PARAFORMAT);
2175     }
2176     else
2177 #endif
2178     {
2179         // PARAFORMAT or PARAFORMAT2
2180         pf.cbSize = sizeof(pf);
2181     }
2182
2183     // do format the selection
2184     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2185
2186     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0) );
2187     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2188
2189     if (pf.wAlignment == PFA_CENTER)
2190         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2191     else if (pf.wAlignment == PFA_RIGHT)
2192         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2193     else if (pf.wAlignment == PFA_JUSTIFY)
2194         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2195     else
2196         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2197
2198     wxArrayInt tabStops;
2199     size_t i;
2200     for (i = 0; i < (size_t) pf.cTabCount; i++)
2201     {
2202         tabStops[i] = (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) ;
2203     }
2204
2205     if ( changeSel )
2206     {
2207         // restore the original selection
2208         DoSetSelection(startOld, endOld, FALSE);
2209     }
2210
2211     return TRUE;
2212 }
2213
2214 #endif
2215
2216 // ----------------------------------------------------------------------------
2217 // wxRichEditModule
2218 // ----------------------------------------------------------------------------
2219
2220 bool wxRichEditModule::OnInit()
2221 {
2222     // don't do anything - we will load it when needed
2223     return TRUE;
2224 }
2225
2226 void wxRichEditModule::OnExit()
2227 {
2228     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2229     {
2230         if ( ms_hRichEdit[i] )
2231         {
2232             ::FreeLibrary(ms_hRichEdit[i]);
2233         }
2234     }
2235 }
2236
2237 /* static */
2238 bool wxRichEditModule::Load(int version)
2239 {
2240     // we don't support loading richedit 3.0 as I don't know how to distinguish
2241     // it from 2.0 anyhow
2242     wxCHECK_MSG( version == 1 || version == 2, FALSE,
2243                  _T("incorrect richedit control version requested") );
2244
2245     // make it the index in the array
2246     version--;
2247
2248     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2249     {
2250         // we had already tried to load it and failed
2251         return FALSE;
2252     }
2253
2254     if ( ms_hRichEdit[version] )
2255     {
2256         // we've already got this one
2257         return TRUE;
2258     }
2259
2260     wxString dllname = version ? _T("riched20") : _T("riched32");
2261     dllname += _T(".dll");
2262
2263     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2264
2265     if ( !ms_hRichEdit[version] )
2266     {
2267         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2268
2269         ms_hRichEdit[version] = (HINSTANCE)-1;
2270
2271         return FALSE;
2272     }
2273
2274     return TRUE;
2275 }
2276
2277 #endif // wxUSE_RICHEDIT
2278
2279 #endif // wxUSE_TEXTCTRL