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     #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 && (!defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__))
  61     #include <richedit.h>
  62 #endif
  63
  64 // old mingw32 doesn't define this
  65 #ifndef CFM_CHARSET
  66     #define CFM_CHARSET 0x08000000
  67 #endif // CFM_CHARSET
  68
  69 #ifndef CFM_BACKCOLOR
  70     #define CFM_BACKCOLOR 0x04000000
  71 #endif
  72
  73 // cygwin does not have these defined for richedit
  74 #ifndef ENM_LINK
  75     #define ENM_LINK 0x04000000
  76 #endif
  77
  78 #ifndef EM_AUTOURLDETECT
  79     #define EM_AUTOURLDETECT (WM_USER + 91)
  80 #endif
  81
  82 #ifndef EN_LINK
  83     #define EN_LINK 0x070b
  84
  85     typedef struct _enlink
  86     {
  87         NMHDR nmhdr;
  88         UINT msg;
  89         WPARAM wParam;
  90         LPARAM lParam;
  91         CHARRANGE chrg;
  92     } ENLINK;
  93 #endif // ENLINK
  94
  95 #ifndef SF_UNICODE
  96     #define SF_UNICODE 0x0010
  97 #endif
  98
  99 // Watcom C++ doesn't define this
 100 #ifndef SCF_ALL
 101 #define SCF_ALL 0x0004
 102 #endif
 103
 104 // ----------------------------------------------------------------------------
 105 // private functions
 106 // ----------------------------------------------------------------------------
 107
 108 #if wxUSE_RICHEDIT
 109
 110 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb);
 111
 112 #endif // wxUSE_RICHEDIT
 113
 114 // ----------------------------------------------------------------------------
 115 // private classes
 116 // ----------------------------------------------------------------------------
 117
 118 #if wxUSE_RICHEDIT
 119
 120 // this module initializes RichEdit DLL(s) if needed
 121 class wxRichEditModule : public wxModule
 122 {
 123 public:
 124     virtual bool OnInit();
 125     virtual void OnExit();
 126
 127     // load the richedit DLL of at least of required version
 128     static bool Load(int version = 1);
 129
 130 private:
 131     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
 132     static HINSTANCE ms_hRichEdit[2];
 133
 134     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 135 };
 136
 137 HINSTANCE wxRichEditModule::ms_hRichEdit[2] = { NULL, NULL };
 138
 139 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 140
 141 #endif // wxUSE_RICHEDIT
 142
 143 // ----------------------------------------------------------------------------
 144 // event tables and other macros
 145 // ----------------------------------------------------------------------------
 146
 147 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 148
 149 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 150     EVT_CHAR(wxTextCtrl::OnChar)
 151     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 152
 153 #if wxUSE_RICHEDIT
 154     EVT_RIGHT_UP(wxTextCtrl::OnRightClick)
 155 #endif
 156
 157     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 158     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 159     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 160     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 161     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 162     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 163     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 164
 165     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 166     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 167     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 168     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 169     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 170     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 171     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 172 #ifdef __WIN16__
 173     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 174 #endif
 175 END_EVENT_TABLE()
 176
 177 // ============================================================================
 178 // implementation
 179 // ============================================================================
 180
 181 // ----------------------------------------------------------------------------
 182 // creation
 183 // ----------------------------------------------------------------------------
 184
 185 void wxTextCtrl::Init()
 186 {
 187 #if wxUSE_RICHEDIT
 188     m_verRichEdit = 0;
 189 #endif // wxUSE_RICHEDIT
 190
 191     m_privateContextMenu = NULL;
 192     m_suppressNextUpdate = FALSE;
 193 }
 194
 195 wxTextCtrl::~wxTextCtrl()
 196 {
 197     if (m_privateContextMenu)
 198     {
 199         delete m_privateContextMenu;
 200         m_privateContextMenu = NULL;
 201     }
 202 }
 203
 204 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 205                         const wxString& value,
 206                         const wxPoint& pos,
 207                         const wxSize& size,
 208                         long style,
 209                         const wxValidator& validator,
 210                         const wxString& name)
 211 {
 212     // base initialization
 213     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 214         return FALSE;
 215
 216     if ( parent )
 217         parent->AddChild(this);
 218
 219     // translate wxWin style flags to MSW ones
 220     WXDWORD msStyle = MSWGetCreateWindowFlags();
 221
 222     // do create the control - either an EDIT or RICHEDIT
 223     wxString windowClass = wxT("EDIT");
 224
 225 #if wxUSE_RICHEDIT
 226     if ( m_windowStyle & wxTE_AUTO_URL )
 227     {
 228         // automatic URL detection only works in RichEdit 2.0+
 229         m_windowStyle |= wxTE_RICH2;
 230     }
 231
 232     if ( m_windowStyle & wxTE_RICH2 )
 233     {
 234         // using richedit 2.0 implies using wxTE_RICH
 235         m_windowStyle |= wxTE_RICH;
 236     }
 237
 238     // we need to load the richedit DLL before creating the rich edit control
 239     if ( m_windowStyle & wxTE_RICH )
 240     {
 241         static bool s_errorGiven = FALSE;// MT-FIXME
 242
 243         // Which version do we need? Use 1.0 by default because it is much more
 244         // like the the standard EDIT or 2.0 if explicitly requested, but use
 245         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 246         //
 247         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 248         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 249         //       should use 3.0 if available as it is the best of both worlds -
 250         //       but as I can't test it right now I don't do it (VZ)
 251 #if wxUSE_UNICODE
 252         const int verRichEdit = 2;
 253 #else // !wxUSE_UNICODE
 254         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 255 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 256
 257         // only give the error msg once if the DLL can't be loaded
 258         if ( !s_errorGiven )
 259         {
 260             // try to load the RichEdit DLL (will do nothing if already done)
 261             if ( !wxRichEditModule::Load(verRichEdit) )
 262             {
 263 #if !wxUSE_UNICODE
 264                 // try another version?
 265                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 266
 267                 if ( !wxRichEditModule::Load(verRichEdit) )
 268 #endif // wxUSE_UNICODE
 269                 {
 270                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 271
 272                     s_errorGiven = TRUE;
 273                 }
 274             }
 275         }
 276
 277         // have we managed to load any richedit version?
 278         if ( !s_errorGiven )
 279         {
 280             msStyle |= ES_AUTOVSCROLL;
 281
 282             m_verRichEdit = verRichEdit;
 283             if ( m_verRichEdit == 1 )
 284             {
 285                 windowClass = wxT("RICHEDIT");
 286             }
 287             else
 288             {
 289 #ifndef RICHEDIT_CLASS
 290                 wxString RICHEDIT_CLASS;
 291                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 292 #if wxUSE_UNICODE
 293                 RICHEDIT_CLASS += _T('W');
 294 #else // ANSI
 295                 RICHEDIT_CLASS += _T('A');
 296 #endif // Unicode/ANSI
 297 #endif // !RICHEDIT_CLASS
 298
 299                 windowClass = RICHEDIT_CLASS;
 300             }
 301         }
 302     }
 303 #endif // wxUSE_RICHEDIT
 304
 305     // we need to turn '\n's into "\r\n"s for the multiline controls
 306     wxString valueWin;
 307     if ( m_windowStyle & wxTE_MULTILINE )
 308     {
 309         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 310     }
 311     else // single line
 312     {
 313         valueWin = value;
 314     }
 315
 316     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 317         return FALSE;
 318
 319     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 320
 321 #if wxUSE_RICHEDIT
 322     if ( IsRich() )
 323     {
 324         // enable the events we're interested in: we want to get EN_CHANGE as
 325         // for the normal controls
 326         LPARAM mask = ENM_CHANGE;
 327
 328         if ( GetRichVersion() == 1 )
 329         {
 330             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 331             // explained in its handler
 332            mask |= ENM_MOUSEEVENTS;
 333         }
 334         else if ( m_windowStyle & wxTE_AUTO_URL )
 335         {
 336             mask |= ENM_LINK;
 337
 338             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 339         }
 340
 341         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 342     }
 343 #endif // wxUSE_RICHEDIT
 344
 345     return TRUE;
 346 }
 347
 348 // Make sure the window style (etc.) reflects the HWND style (roughly)
 349 void wxTextCtrl::AdoptAttributesFromHWND()
 350 {
 351     wxWindow::AdoptAttributesFromHWND();
 352
 353     HWND hWnd = GetHwnd();
 354     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 355
 356     // retrieve the style to see whether this is an edit or richedit ctrl
 357 #if wxUSE_RICHEDIT
 358     wxString classname = wxGetWindowClass(GetHWND());
 359
 360     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 361     {
 362         m_verRichEdit = 0;
 363     }
 364     else // rich edit?
 365     {
 366         wxChar c;
 367         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 368         {
 369             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 370
 371             m_verRichEdit = 0;
 372         }
 373     }
 374 #endif // wxUSE_RICHEDIT
 375
 376     if (style & ES_MULTILINE)
 377         m_windowStyle |= wxTE_MULTILINE;
 378     if (style & ES_PASSWORD)
 379         m_windowStyle |= wxTE_PASSWORD;
 380     if (style & ES_READONLY)
 381         m_windowStyle |= wxTE_READONLY;
 382     if (style & ES_WANTRETURN)
 383         m_windowStyle |= wxTE_PROCESS_ENTER;
 384     if (style & ES_CENTER)
 385         m_windowStyle |= wxTE_CENTRE;
 386     if (style & ES_RIGHT)
 387         m_windowStyle |= wxTE_RIGHT;
 388 }
 389
 390 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 391 {
 392     // default border for the text controls is the sunken one
 393     if ( (style & wxBORDER_MASK) == wxBORDER_DEFAULT )
 394     {
 395         style |= wxBORDER_SUNKEN;
 396     }
 397
 398     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 399
 400     // default styles
 401     msStyle |= ES_LEFT;
 402
 403     if ( style & wxTE_MULTILINE )
 404     {
 405         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 406                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 407
 408         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 409         if ( !(style & wxTE_NO_VSCROLL) )
 410             msStyle |= WS_VSCROLL;
 411
 412         style |= wxTE_PROCESS_ENTER;
 413     }
 414     else // !multiline
 415     {
 416         // there is really no reason to not have this style for single line
 417         // text controls
 418         msStyle |= ES_AUTOHSCROLL;
 419     }
 420
 421     if ( style & wxHSCROLL )
 422         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 423
 424     if ( style & wxTE_READONLY )
 425         msStyle |= ES_READONLY;
 426
 427     if ( style & wxTE_PASSWORD )
 428         msStyle |= ES_PASSWORD;
 429
 430     if ( style & wxTE_AUTO_SCROLL )
 431         msStyle |= ES_AUTOHSCROLL;
 432
 433     if ( style & wxTE_NOHIDESEL )
 434         msStyle |= ES_NOHIDESEL;
 435
 436     if ( style & wxTE_CENTRE )
 437         msStyle |= ES_CENTER;
 438
 439     if ( style & wxTE_RIGHT )
 440         msStyle |= ES_RIGHT;
 441
 442     return msStyle;
 443 }
 444
 445 void wxTextCtrl::SetWindowStyleFlag(long style)
 446 {
 447 #if wxUSE_RICHEDIT
 448     // we have to deal with some styles separately because they can't be
 449     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 450     // using richedit-specific EM_SETOPTIONS
 451     if ( IsRich() &&
 452             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 453     {
 454         bool set = (style & wxTE_NOHIDESEL) != 0;
 455
 456         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 457                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 458     }
 459 #endif // wxUSE_RICHEDIT
 460
 461     wxControl::SetWindowStyleFlag(style);
 462 }
 463
 464 // ----------------------------------------------------------------------------
 465 // set/get the controls text
 466 // ----------------------------------------------------------------------------
 467
 468 wxString wxTextCtrl::GetValue() const
 469 {
 470     // range 0..-1 is special for GetRange() and means to retrieve all text
 471     return GetRange(0, -1);
 472 }
 473
 474 wxString wxTextCtrl::GetRange(long from, long to) const
 475 {
 476     wxString str;
 477
 478     if ( from >= to && to != -1 )
 479     {
 480         // nothing to retrieve
 481         return str;
 482     }
 483
 484 #if wxUSE_RICHEDIT
 485     if ( IsRich() )
 486     {
 487         int len = GetWindowTextLength(GetHwnd());
 488         if ( len > from )
 489         {
 490             // alloc one extra WORD as needed by the control
 491             wxChar *p = str.GetWriteBuf(++len);
 492
 493             TEXTRANGE textRange;
 494             textRange.chrg.cpMin = from;
 495             textRange.chrg.cpMax = to == -1 ? len : to;
 496             textRange.lpstrText = p;
 497
 498             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 499
 500             if ( m_verRichEdit > 1 )
 501             {
 502                 // RichEdit 2.0 uses just CR ('\r') for the newlines which is
 503                 // neither Unix nor Windows style - convert it to something
 504                 // reasonable
 505                 for ( ; *p; p++ )
 506                 {
 507                     if ( *p == _T('\r') )
 508                         *p = _T('\n');
 509                 }
 510             }
 511
 512             str.UngetWriteBuf();
 513
 514             if ( m_verRichEdit == 1 )
 515             {
 516                 // convert to the canonical form - see comment below
 517                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 518             }
 519         }
 520         //else: no text at all, leave the string empty
 521     }
 522     else
 523 #endif // wxUSE_RICHEDIT
 524     {
 525         // retrieve all text
 526         str = wxGetWindowText(GetHWND());
 527
 528         // need only a range?
 529         if ( from < to )
 530         {
 531             str = str.Mid(from, to - from);
 532         }
 533
 534         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 535         // canonical one (same one as above) for consistency with the other kinds
 536         // of controls and, more importantly, with the other ports
 537         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 538     }
 539
 540     return str;
 541 }
 542
 543 void wxTextCtrl::SetValue(const wxString& value)
 544 {
 545     // if the text is long enough, it's faster to just set it instead of first
 546     // comparing it with the old one (chances are that it will be different
 547     // anyhow, this comparison is there to avoid flicker for small single-line
 548     // edit controls mostly)
 549     if ( (value.length() > 0x400) || (value != GetValue()) )
 550     {
 551         DoWriteText(value, FALSE /* not selection only */);
 552
 553         // mark the control as being not dirty - we changed its text, not the
 554         // user
 555         DiscardEdits();
 556
 557         // for compatibility, don't move the cursor when doing SetValue()
 558         SetInsertionPoint(0);
 559     }
 560 }
 561
 562 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 563
 564 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 565 {
 566     *pcb = 0;
 567
 568     wchar_t *wbuf = (wchar_t *)buf;
 569     const wchar_t *wpc = *(const wchar_t **)dwCookie;
 570     while ( cb && *wpc )
 571     {
 572         *wbuf++ = *wpc++;
 573
 574         cb -= sizeof(wchar_t);
 575         (*pcb) += sizeof(wchar_t);
 576     }
 577
 578     *(const wchar_t **)dwCookie = wpc;
 579
 580     return 0;
 581 }
 582
 583 extern long wxEncodingToCodepage(wxFontEncoding encoding); // from utils.cpp
 584
 585 #ifdef __WXWINE__
 586 bool wxTextCtrl::StreamIn(const wxString& value,
 587                           wxFontEncoding WXUNUSED(encoding),
 588                           bool selectionOnly)
 589 {
 590     return FALSE;
 591 }
 592 #else // !__WXWINE__
 593
 594 #if wxUSE_UNICODE_MSLU
 595 bool wxTextCtrl::StreamIn(const wxString& value,
 596                           wxFontEncoding WXUNUSED(encoding),
 597                           bool selectionOnly)
 598 {
 599     const wchar_t *wpc = value.c_str();
 600 #else // !wxUSE_UNICODE_MSLU
 601 bool wxTextCtrl::StreamIn(const wxString& value,
 602                           wxFontEncoding encoding,
 603                           bool selectionOnly)
 604 {
 605     // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
 606     // text in the non default charset -- otherwise it thinks it knows better
 607     // than we do and always shows it in the default one
 608
 609     // first get the Windows code page for this encoding
 610     long codepage = wxEncodingToCodepage(encoding);
 611     if ( codepage == -1 )
 612     {
 613         // unknown encoding
 614         return FALSE;
 615     }
 616
 617     // next translate to Unicode using this code page
 618     int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
 619
 620 #if wxUSE_WCHAR_T
 621     wxWCharBuffer wchBuf(len);
 622 #else
 623     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 624 #endif
 625
 626     if ( !::MultiByteToWideChar(codepage, 0, value, -1,
 627                                 (wchar_t *)(const wchar_t *)wchBuf, len) )
 628     {
 629         wxLogLastError(_T("MultiByteToWideChar"));
 630     }
 631
 632     // finally, stream it in the control
 633     const wchar_t *wpc = wchBuf;
 634 #endif // wxUSE_UNICODE_MSLU
 635
 636     EDITSTREAM eds;
 637     wxZeroMemory(eds);
 638     eds.dwCookie = (DWORD)&wpc;
 639     // the cast below is needed for broken (very) old mingw32 headers
 640     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 641
 642     // we're going to receive 2 EN_CHANGE notifications if we got any selection
 643     // (same problem as in DoWriteText())
 644     if ( selectionOnly && HasSelection() )
 645     {
 646         // so suppress one of them
 647         m_suppressNextUpdate = TRUE;
 648     }
 649
 650     if ( !::SendMessage(GetHwnd(), EM_STREAMIN,
 651                         SF_TEXT |
 652                         SF_UNICODE |
 653                         (selectionOnly ? SFF_SELECTION : 0),
 654                         (LPARAM)&eds) || eds.dwError )
 655     {
 656         wxLogLastError(_T("EM_STREAMIN"));
 657     }
 658
 659 #if !wxUSE_WCHAR_T
 660     free(wchBuf);
 661 #endif // !wxUSE_WCHAR_T
 662
 663     return TRUE;
 664 }
 665
 666 #endif // __WXWINE__/!__WXWINE__
 667
 668 #endif // wxUSE_RICHEDIT
 669
 670 void wxTextCtrl::WriteText(const wxString& value)
 671 {
 672     DoWriteText(value);
 673 }
 674
 675 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 676 {
 677     wxString valueDos;
 678     if ( m_windowStyle & wxTE_MULTILINE )
 679         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 680     else
 681         valueDos = value;
 682
 683 #if wxUSE_RICHEDIT
 684     // there are several complications with the rich edit controls here
 685     bool done = FALSE;
 686     if ( IsRich() )
 687     {
 688         // first, ensure that the new text will be in the default style
 689         if ( !m_defaultStyle.IsDefault() )
 690         {
 691             long start, end;
 692             GetSelection(&start, &end);
 693             SetStyle(start, end, m_defaultStyle);
 694         }
 695
 696 #if wxUSE_UNICODE_MSLU
 697         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 698         // but EM_STREAMIN works
 699         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 700         {
 701            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 702         }
 703 #endif // wxUSE_UNICODE_MSLU
 704
 705 #if !wxUSE_UNICODE && !defined(__WXWINE__)
 706         // next check if the text we're inserting must be shown in a non
 707         // default charset -- this only works for RichEdit > 1.0
 708         if ( GetRichVersion() > 1 )
 709         {
 710             wxFont font = m_defaultStyle.GetFont();
 711             if ( !font.Ok() )
 712                 font = GetFont();
 713
 714             if ( font.Ok() )
 715             {
 716                wxFontEncoding encoding = font.GetEncoding();
 717                if ( encoding != wxFONTENCODING_SYSTEM )
 718                {
 719                    done = StreamIn(valueDos, encoding, selectionOnly);
 720                }
 721             }
 722         }
 723 #endif // !wxUSE_UNICODE
 724     }
 725
 726     if ( !done )
 727 #endif // wxUSE_RICHEDIT
 728     {
 729         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
 730         // call below which is confusing for the client code and so should be
 731         // avoided
 732         //
 733         // these cases are: (a) plain EDIT controls if EM_REPLACESEL is used
 734         // and there is a non empty selection currently and (b) rich text
 735         // controls in any case
 736         if (
 737 #if wxUSE_RICHEDIT
 738             IsRich() ||
 739 #endif // wxUSE_RICHEDIT
 740             (selectionOnly && HasSelection()) )
 741         {
 742             m_suppressNextUpdate = TRUE;
 743         }
 744
 745         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 746                       0, (LPARAM)valueDos.c_str());
 747
 748         // OTOH, non rich text controls don't generate any events at all when
 749         // we use WM_SETTEXT -- have to emulate them here
 750         if ( !selectionOnly
 751 #if wxUSE_RICHEDIT
 752                 && !IsRich()
 753 #endif // wxUSE_RICHEDIT
 754            )
 755         {
 756             SendUpdateEvent();
 757         }
 758     }
 759
 760     AdjustSpaceLimit();
 761 }
 762
 763 void wxTextCtrl::AppendText(const wxString& text)
 764 {
 765     SetInsertionPointEnd();
 766
 767     WriteText(text);
 768
 769 #if wxUSE_RICHEDIT
 770     if ( IsMultiLine() && GetRichVersion() > 1 )
 771     {
 772         // setting the caret to the end and showing it simply doesn't work for
 773         // RichEdit 2.0 -- force it to still do what we want
 774         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
 775     }
 776 #endif // wxUSE_RICHEDIT
 777 }
 778
 779 void wxTextCtrl::Clear()
 780 {
 781     ::SetWindowText(GetHwnd(), wxT(""));
 782
 783 #if wxUSE_RICHEDIT
 784     if ( !IsRich() )
 785 #endif // wxUSE_RICHEDIT
 786     {
 787         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 788         // but the normal ones don't -- make Clear() behaviour consistent by
 789         // always sending this event
 790         SendUpdateEvent();
 791     }
 792 }
 793
 794 #ifdef __WIN32__
 795
 796 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 797 {
 798     SetFocus();
 799
 800     size_t lenOld = GetValue().length();
 801
 802     wxUint32 code = event.GetRawKeyCode();
 803     ::keybd_event(code, 0, 0 /* key press */, 0);
 804     ::keybd_event(code, 0, KEYEVENTF_KEYUP, 0);
 805
 806     // assume that any alphanumeric key changes the total number of characters
 807     // in the control - this should work in 99% of cases
 808     return GetValue().length() != lenOld;
 809 }
 810
 811 #endif // __WIN32__
 812
 813 // ----------------------------------------------------------------------------
 814 // Clipboard operations
 815 // ----------------------------------------------------------------------------
 816
 817 void wxTextCtrl::Copy()
 818 {
 819     if (CanCopy())
 820     {
 821         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
 822     }
 823 }
 824
 825 void wxTextCtrl::Cut()
 826 {
 827     if (CanCut())
 828     {
 829         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
 830     }
 831 }
 832
 833 void wxTextCtrl::Paste()
 834 {
 835     if (CanPaste())
 836     {
 837         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
 838     }
 839 }
 840
 841 bool wxTextCtrl::HasSelection() const
 842 {
 843     long from, to;
 844     GetSelection(&from, &to);
 845     return from != to;
 846 }
 847
 848 bool wxTextCtrl::CanCopy() const
 849 {
 850     // Can copy if there's a selection
 851     return HasSelection();
 852 }
 853
 854 bool wxTextCtrl::CanCut() const
 855 {
 856     return CanCopy() && IsEditable();
 857 }
 858
 859 bool wxTextCtrl::CanPaste() const
 860 {
 861     if ( !IsEditable() )
 862         return FALSE;
 863
 864 #if wxUSE_RICHEDIT
 865     if ( IsRich() )
 866     {
 867         UINT cf = 0; // 0 == any format
 868
 869         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 870     }
 871 #endif // wxUSE_RICHEDIT
 872
 873     // Standard edit control: check for straight text on clipboard
 874     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 875         return FALSE;
 876
 877     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 878     ::CloseClipboard();
 879
 880     return isTextAvailable;
 881 }
 882
 883 // ----------------------------------------------------------------------------
 884 // Accessors
 885 // ----------------------------------------------------------------------------
 886
 887 void wxTextCtrl::SetEditable(bool editable)
 888 {
 889     HWND hWnd = GetHwnd();
 890     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 891 }
 892
 893 void wxTextCtrl::SetInsertionPoint(long pos)
 894 {
 895     DoSetSelection(pos, pos);
 896 }
 897
 898 void wxTextCtrl::SetInsertionPointEnd()
 899 {
 900     long pos;
 901
 902 #if wxUSE_RICHEDIT
 903     if ( m_verRichEdit == 1 )
 904     {
 905         // we don't have to waste time calling GetLastPosition() in this case
 906         pos = -1;
 907     }
 908     else // !RichEdit 1.0
 909 #endif // wxUSE_RICHEDIT
 910     {
 911         pos = GetLastPosition();
 912     }
 913
 914     SetInsertionPoint(pos);
 915 }
 916
 917 long wxTextCtrl::GetInsertionPoint() const
 918 {
 919 #if wxUSE_RICHEDIT
 920     if ( IsRich() )
 921     {
 922         CHARRANGE range;
 923         range.cpMin = 0;
 924         range.cpMax = 0;
 925         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 926         return range.cpMin;
 927     }
 928 #endif // wxUSE_RICHEDIT
 929
 930     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 931     return Pos & 0xFFFF;
 932 }
 933
 934 long wxTextCtrl::GetLastPosition() const
 935 {
 936     int numLines = GetNumberOfLines();
 937     long posStartLastLine = XYToPosition(0, numLines - 1);
 938
 939     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
 940
 941     return posStartLastLine + lenLastLine;
 942 }
 943
 944 // If the return values from and to are the same, there is no
 945 // selection.
 946 void wxTextCtrl::GetSelection(long* from, long* to) const
 947 {
 948 #if wxUSE_RICHEDIT
 949     if ( IsRich() )
 950     {
 951         CHARRANGE charRange;
 952         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 953
 954         *from = charRange.cpMin;
 955         *to = charRange.cpMax;
 956     }
 957     else
 958 #endif // !wxUSE_RICHEDIT
 959     {
 960         DWORD dwStart, dwEnd;
 961         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 962
 963         *from = dwStart;
 964         *to = dwEnd;
 965     }
 966 }
 967
 968 bool wxTextCtrl::IsEditable() const
 969 {
 970     // strangely enough, we may be called before the control is created: our
 971     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
 972     // us
 973     if ( !m_hWnd )
 974         return TRUE;
 975
 976     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 977
 978     return (style & ES_READONLY) == 0;
 979 }
 980
 981 // ----------------------------------------------------------------------------
 982 // selection
 983 // ----------------------------------------------------------------------------
 984
 985 void wxTextCtrl::SetSelection(long from, long to)
 986 {
 987     // if from and to are both -1, it means (in wxWindows) that all text should
 988     // be selected - translate into Windows convention
 989     if ( (from == -1) && (to == -1) )
 990     {
 991         from = 0;
 992         to = -1;
 993     }
 994
 995     DoSetSelection(from, to);
 996 }
 997
 998 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 999 {
1000     HWND hWnd = GetHwnd();
1001
1002 #ifdef __WIN32__
1003 #if wxUSE_RICHEDIT
1004     if ( IsRich() )
1005     {
1006         CHARRANGE range;
1007         range.cpMin = from;
1008         range.cpMax = to;
1009         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
1010     }
1011     else
1012 #endif // wxUSE_RICHEDIT
1013     {
1014         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
1015     }
1016
1017     if ( scrollCaret )
1018     {
1019         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1020     }
1021 #else // Win16
1022     // WPARAM is 0: selection is scrolled into view
1023     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
1024 #endif // Win32/16
1025 }
1026
1027 // ----------------------------------------------------------------------------
1028 // Editing
1029 // ----------------------------------------------------------------------------
1030
1031 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1032 {
1033     // Set selection and remove it
1034     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
1035
1036     SendMessage(GetHwnd(), EM_REPLACESEL,
1037 #ifdef __WIN32__
1038                 TRUE,
1039 #else
1040                 FALSE,
1041 #endif
1042                 (LPARAM)value.c_str());
1043 }
1044
1045 void wxTextCtrl::Remove(long from, long to)
1046 {
1047     Replace(from, to, _T(""));
1048 }
1049
1050 bool wxTextCtrl::LoadFile(const wxString& file)
1051 {
1052     if ( wxTextCtrlBase::LoadFile(file) )
1053     {
1054         // update the size limit if needed
1055         AdjustSpaceLimit();
1056
1057         return TRUE;
1058     }
1059
1060     return FALSE;
1061 }
1062
1063 bool wxTextCtrl::IsModified() const
1064 {
1065     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1066 }
1067
1068 // Makes 'unmodified'
1069 void wxTextCtrl::DiscardEdits()
1070 {
1071     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1072 }
1073
1074 int wxTextCtrl::GetNumberOfLines() const
1075 {
1076     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1077 }
1078
1079 long wxTextCtrl::XYToPosition(long x, long y) const
1080 {
1081     // This gets the char index for the _beginning_ of this line
1082     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1083
1084     return charIndex + x;
1085 }
1086
1087 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1088 {
1089     HWND hWnd = GetHwnd();
1090
1091     // This gets the line number containing the character
1092     long lineNo;
1093 #if wxUSE_RICHEDIT
1094     if ( IsRich() )
1095     {
1096         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1097     }
1098     else
1099 #endif // wxUSE_RICHEDIT
1100     {
1101         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1102     }
1103
1104     if ( lineNo == -1 )
1105     {
1106         // no such line
1107         return FALSE;
1108     }
1109
1110     // This gets the char index for the _beginning_ of this line
1111     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1112     if ( charIndex == -1 )
1113     {
1114         return FALSE;
1115     }
1116
1117     // The X position must therefore be the different between pos and charIndex
1118     if ( x )
1119         *x = pos - charIndex;
1120     if ( y )
1121         *y = lineNo;
1122
1123     return TRUE;
1124 }
1125
1126 void wxTextCtrl::ShowPosition(long pos)
1127 {
1128     HWND hWnd = GetHwnd();
1129
1130     // To scroll to a position, we pass the number of lines and characters
1131     // to scroll *by*. This means that we need to:
1132     // (1) Find the line position of the current line.
1133     // (2) Find the line position of pos.
1134     // (3) Scroll by (pos - current).
1135     // For now, ignore the horizontal scrolling.
1136
1137     // Is this where scrolling is relative to - the line containing the caret?
1138     // Or is the first visible line??? Try first visible line.
1139 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1140
1141     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1142
1143     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1144
1145     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1146
1147     if (linesToScroll != 0)
1148       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1149 }
1150
1151 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1152 {
1153     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1154 }
1155
1156 int wxTextCtrl::GetLineLength(long lineNo) const
1157 {
1158     long pos = XYToPosition(0, lineNo);
1159
1160     return GetLengthOfLineContainingPos(pos);
1161 }
1162
1163 wxString wxTextCtrl::GetLineText(long lineNo) const
1164 {
1165     size_t len = (size_t)GetLineLength(lineNo) + 1;
1166
1167     // there must be at least enough place for the length WORD in the
1168     // buffer
1169     len += sizeof(WORD);
1170
1171     wxString str;
1172     wxChar *buf = str.GetWriteBuf(len);
1173
1174     *(WORD *)buf = (WORD)len;
1175     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1176     buf[len] = 0;
1177
1178     str.UngetWriteBuf(len);
1179
1180     return str;
1181 }
1182
1183 void wxTextCtrl::SetMaxLength(unsigned long len)
1184 {
1185     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1186 }
1187
1188 // ----------------------------------------------------------------------------
1189 // Undo/redo
1190 // ----------------------------------------------------------------------------
1191
1192 void wxTextCtrl::Undo()
1193 {
1194     if (CanUndo())
1195     {
1196         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1197     }
1198 }
1199
1200 void wxTextCtrl::Redo()
1201 {
1202     if (CanRedo())
1203     {
1204         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1205         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1206     }
1207 }
1208
1209 bool wxTextCtrl::CanUndo() const
1210 {
1211     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1212 }
1213
1214 bool wxTextCtrl::CanRedo() const
1215 {
1216     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1217 }
1218
1219 // ----------------------------------------------------------------------------
1220 // implemenation details
1221 // ----------------------------------------------------------------------------
1222
1223 void wxTextCtrl::Command(wxCommandEvent & event)
1224 {
1225     SetValue(event.GetString());
1226     ProcessCommand (event);
1227 }
1228
1229 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1230 {
1231     // By default, load the first file into the text window.
1232     if (event.GetNumberOfFiles() > 0)
1233     {
1234         LoadFile(event.GetFiles()[0]);
1235     }
1236 }
1237
1238 // ----------------------------------------------------------------------------
1239 // kbd input processing
1240 // ----------------------------------------------------------------------------
1241
1242 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1243 {
1244     MSG *msg = (MSG *)pMsg;
1245
1246     // check for our special keys here: if we don't do it and the parent frame
1247     // uses them as accelerators, they wouldn't work at all, so we disable
1248     // usual preprocessing for them
1249     if ( msg->message == WM_KEYDOWN )
1250     {
1251         WORD vkey = (WORD) msg->wParam;
1252         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1253         {
1254             if ( vkey == VK_BACK )
1255                 return FALSE;
1256         }
1257         else // no Alt
1258         {
1259             // we want to process some Ctrl-foo and Shift-bar but no key
1260             // combinations without either Ctrl or Shift nor with both of them
1261             // pressed
1262             const int ctrl = wxIsCtrlDown(),
1263                       shift = wxIsShiftDown();
1264             switch ( ctrl + shift )
1265             {
1266                 default:
1267                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1268                     // fall through
1269
1270                 case 0:
1271                 case 2:
1272                     break;
1273
1274                 case 1:
1275                     // either Ctrl or Shift pressed
1276                     if ( ctrl )
1277                     {
1278                         switch ( vkey )
1279                         {
1280                             case 'C':
1281                             case 'V':
1282                             case 'X':
1283                             case VK_INSERT:
1284                             case VK_DELETE:
1285                             case VK_HOME:
1286                             case VK_END:
1287                                 return FALSE;
1288                         }
1289                     }
1290                     else // Shift is pressed
1291                     {
1292                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1293                             return FALSE;
1294                     }
1295             }
1296         }
1297     }
1298
1299     return wxControl::MSWShouldPreProcessMessage(pMsg);
1300 }
1301
1302 void wxTextCtrl::OnChar(wxKeyEvent& event)
1303 {
1304     switch ( event.KeyCode() )
1305     {
1306         case WXK_RETURN:
1307             if ( !(m_windowStyle & wxTE_MULTILINE) )
1308             {
1309                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1310                 InitCommandEvent(event);
1311                 event.SetString(GetValue());
1312                 if ( GetEventHandler()->ProcessEvent(event) )
1313                     return;
1314             }
1315             //else: multiline controls need Enter for themselves
1316
1317             break;
1318
1319         case WXK_TAB:
1320             // always produce navigation event - even if we process TAB
1321             // ourselves the fact that we got here means that the user code
1322             // decided to skip processing of this TAB - probably to let it
1323             // do its default job.
1324             {
1325                 wxNavigationKeyEvent eventNav;
1326                 eventNav.SetDirection(!event.ShiftDown());
1327                 eventNav.SetWindowChange(event.ControlDown());
1328                 eventNav.SetEventObject(this);
1329
1330                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1331                     return;
1332             }
1333             break;
1334     }
1335
1336     // no, we didn't process it
1337     event.Skip();
1338 }
1339
1340 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1341 {
1342     long lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1343
1344     if ( nMsg == WM_GETDLGCODE )
1345     {
1346         // we always want the chars and the arrows: the arrows for navigation
1347         // and the chars because we want Ctrl-C to work even in a read only
1348         // control
1349         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1350
1351         if ( IsEditable() )
1352         {
1353             // we may have several different cases:
1354             // 1. normal case: both TAB and ENTER are used for dlg navigation
1355             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1356             //    next control in the dialog
1357             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1358             //    navigation
1359             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1360             //    to the next control
1361
1362             // the multiline edit control should always get <Return> for itself
1363             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1364                 lDlgCode |= DLGC_WANTMESSAGE;
1365
1366             if ( HasFlag(wxTE_PROCESS_TAB) )
1367                 lDlgCode |= DLGC_WANTTAB;
1368
1369             lRc |= lDlgCode;
1370         }
1371         else // !editable
1372         {
1373             // NB: use "=", not "|=" as the base class version returns the
1374             //     same flags is this state as usual (i.e. including
1375             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1376             //     native Win32 apps?) but for now live with it.
1377             lRc = lDlgCode;
1378         }
1379     }
1380
1381     return lRc;
1382 }
1383
1384 // ----------------------------------------------------------------------------
1385 // text control event processing
1386 // ----------------------------------------------------------------------------
1387
1388 bool wxTextCtrl::SendUpdateEvent()
1389 {
1390     // is event reporting suspended?
1391     if ( m_suppressNextUpdate )
1392     {
1393         // do process the next one
1394         m_suppressNextUpdate = FALSE;
1395
1396         return FALSE;
1397     }
1398
1399     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1400     InitCommandEvent(event);
1401     event.SetString(GetValue());
1402
1403     return ProcessCommand(event);
1404 }
1405
1406 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1407 {
1408     switch ( param )
1409     {
1410         case EN_SETFOCUS:
1411         case EN_KILLFOCUS:
1412             {
1413                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1414                                                          : wxEVT_SET_FOCUS,
1415                                    m_windowId);
1416                 event.SetEventObject(this);
1417                 GetEventHandler()->ProcessEvent(event);
1418             }
1419             break;
1420
1421         case EN_CHANGE:
1422             SendUpdateEvent();
1423             break;
1424
1425         case EN_MAXTEXT:
1426             // the text size limit has been hit -- try to increase it
1427             if ( !AdjustSpaceLimit() )
1428             {
1429                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1430                 InitCommandEvent(event);
1431                 event.SetString(GetValue());
1432                 ProcessCommand(event);
1433             }
1434             break;
1435
1436             // the other edit notification messages are not processed
1437         default:
1438             return FALSE;
1439     }
1440
1441     // processed
1442     return TRUE;
1443 }
1444
1445 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1446 #if wxUSE_CTL3D
1447                                WXUINT message,
1448                                WXWPARAM wParam,
1449                                WXLPARAM lParam
1450 #else
1451                                WXUINT WXUNUSED(message),
1452                                WXWPARAM WXUNUSED(wParam),
1453                                WXLPARAM WXUNUSED(lParam)
1454 #endif
1455     )
1456 {
1457 #if wxUSE_CTL3D
1458     if ( m_useCtl3D )
1459     {
1460         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1461         return (WXHBRUSH) hbrush;
1462     }
1463 #endif // wxUSE_CTL3D
1464
1465     HDC hdc = (HDC)pDC;
1466     if (GetParent()->GetTransparentBackground())
1467         SetBkMode(hdc, TRANSPARENT);
1468     else
1469         SetBkMode(hdc, OPAQUE);
1470
1471     wxColour colBack = GetBackgroundColour();
1472
1473     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1474         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1475
1476     ::SetBkColor(hdc, wxColourToRGB(colBack));
1477     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1478
1479     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1480
1481     return (WXHBRUSH)brush->GetResourceHandle();
1482 }
1483
1484 // In WIN16, need to override normal erasing because
1485 // Ctl3D doesn't use the wxWindows background colour.
1486 #ifdef __WIN16__
1487 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1488 {
1489     wxColour col(m_backgroundColour);
1490
1491 #if wxUSE_CTL3D
1492     if (m_useCtl3D)
1493         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1494 #endif
1495
1496     RECT rect;
1497     ::GetClientRect(GetHwnd(), &rect);
1498
1499     COLORREF ref = wxColourToRGB(col);
1500     HBRUSH hBrush = ::CreateSolidBrush(ref);
1501     if ( !hBrush )
1502         wxLogLastError(wxT("CreateSolidBrush"));
1503
1504     HDC hdc = (HDC)event.GetDC()->GetHDC();
1505
1506     int mode = ::SetMapMode(hdc, MM_TEXT);
1507
1508     ::FillRect(hdc, &rect, hBrush);
1509     ::DeleteObject(hBrush);
1510     ::SetMapMode(hdc, mode);
1511
1512 }
1513 #endif // Win16
1514
1515 bool wxTextCtrl::AdjustSpaceLimit()
1516 {
1517 #ifndef __WIN16__
1518     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1519
1520     // HACK: we try to automatically extend the limit for the amount of text
1521     //       to allow (interactively) entering more than 64Kb of text under
1522     //       Win9x but we shouldn't reset the text limit which was previously
1523     //       set explicitly with SetMaxLength()
1524     //
1525     //       we could solve this by storing the limit we set in wxTextCtrl but
1526     //       to save space we prefer to simply test here the actual limit
1527     //       value: we consider that SetMaxLength() can only be called for
1528     //       values < 32Kb
1529     if ( limit < 0x8000 )
1530     {
1531         // we've got more text than limit set by SetMaxLength()
1532         return FALSE;
1533     }
1534
1535     unsigned int len = ::GetWindowTextLength(GetHwnd());
1536     if ( len >= limit )
1537     {
1538         limit = len + 0x8000;    // 32Kb
1539
1540 #if wxUSE_RICHEDIT
1541         if ( IsRich() )
1542         {
1543             // as a nice side effect, this also allows passing limit > 64Kb
1544             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1545         }
1546         else
1547 #endif // wxUSE_RICHEDIT
1548         {
1549             if ( limit > 0xffff )
1550             {
1551                 // this will set it to a platform-dependent maximum (much more
1552                 // than 64Kb under NT)
1553                 limit = 0;
1554             }
1555
1556             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1557         }
1558     }
1559 #endif // !Win16
1560
1561     // we changed the limit
1562     return TRUE;
1563 }
1564
1565 bool wxTextCtrl::AcceptsFocus() const
1566 {
1567     // we don't want focus if we can't be edited unless we're a multiline
1568     // control because then it might be still nice to get focus from keyboard
1569     // to be able to scroll it without mouse
1570     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1571 }
1572
1573 wxSize wxTextCtrl::DoGetBestSize() const
1574 {
1575     int cx, cy;
1576     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1577
1578     int wText = DEFAULT_ITEM_WIDTH;
1579
1580     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1581     if ( m_windowStyle & wxTE_MULTILINE )
1582     {
1583         hText *= wxMax(GetNumberOfLines(), 5);
1584     }
1585     //else: for single line control everything is ok
1586
1587     return wxSize(wText, hText);
1588 }
1589
1590 // ----------------------------------------------------------------------------
1591 // standard handlers for standard edit menu events
1592 // ----------------------------------------------------------------------------
1593
1594 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1595 {
1596     Cut();
1597 }
1598
1599 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1600 {
1601     Copy();
1602 }
1603
1604 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1605 {
1606     Paste();
1607 }
1608
1609 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1610 {
1611     Undo();
1612 }
1613
1614 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1615 {
1616     Redo();
1617 }
1618
1619 void wxTextCtrl::OnDelete(wxCommandEvent& event)
1620 {
1621     long from, to;
1622     GetSelection(& from, & to);
1623     if (from != -1 && to != -1)
1624         Remove(from, to);
1625 }
1626
1627 void wxTextCtrl::OnSelectAll(wxCommandEvent& event)
1628 {
1629     SetSelection(-1, -1);
1630 }
1631
1632 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1633 {
1634     event.Enable( CanCut() );
1635 }
1636
1637 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1638 {
1639     event.Enable( CanCopy() );
1640 }
1641
1642 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1643 {
1644     event.Enable( CanPaste() );
1645 }
1646
1647 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1648 {
1649     event.Enable( CanUndo() );
1650 }
1651
1652 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1653 {
1654     event.Enable( CanRedo() );
1655 }
1656
1657 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
1658 {
1659     long from, to;
1660     GetSelection(& from, & to);
1661     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
1662 }
1663
1664 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
1665 {
1666     event.Enable(GetLastPosition() > 0);
1667 }
1668
1669 void wxTextCtrl::OnRightClick(wxMouseEvent& event)
1670 {
1671 #if wxUSE_RICHEDIT
1672     if (IsRich())
1673     {
1674         if (!m_privateContextMenu)
1675         {
1676             m_privateContextMenu = new wxMenu;
1677             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
1678             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
1679             m_privateContextMenu->AppendSeparator();
1680             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
1681             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
1682             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
1683             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
1684             m_privateContextMenu->AppendSeparator();
1685             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
1686         }
1687         PopupMenu(m_privateContextMenu, event.GetPosition());
1688         return;
1689     }
1690     else
1691 #endif
1692     event.Skip();
1693 }
1694
1695 // the rest of the file only deals with the rich edit controls
1696 #if wxUSE_RICHEDIT
1697
1698 // ----------------------------------------------------------------------------
1699 // EN_LINK processing
1700 // ----------------------------------------------------------------------------
1701
1702 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1703 {
1704 #ifndef __WXWINE__
1705     NMHDR *hdr = (NMHDR* )lParam;
1706     switch ( hdr->code )
1707     {
1708        case EN_MSGFILTER:
1709             {
1710                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
1711                 UINT msg = msgf->msg;
1712
1713                 // this is a bit crazy but richedit 1.0 sends us all mouse
1714                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
1715                 // generate the wxWin events for this message manually
1716                 //
1717                 // NB: in fact, this is still not totally correct as it does
1718                 //     send us WM_LBUTTONUP if the selection was cleared by the
1719                 //     last click -- so currently we get 2 events in this case,
1720                 //     but as I don't see any obvious way to check for this I
1721                 //     leave this code in place because it's still better than
1722                 //     not getting left up events at all
1723                 if ( msg == WM_LBUTTONUP )
1724                 {
1725                     WXUINT flags = msgf->wParam;
1726                     int x = GET_X_LPARAM(msgf->lParam),
1727                         y = GET_Y_LPARAM(msgf->lParam);
1728
1729                     HandleMouseEvent(msg, x, y, flags);
1730                 }
1731             }
1732
1733             // return TRUE to process the event (and FALSE to ignore it)
1734             return TRUE;
1735
1736         case EN_LINK:
1737             {
1738                 const ENLINK *enlink = (ENLINK *)hdr;
1739
1740                 switch ( enlink->msg )
1741                 {
1742                     case WM_SETCURSOR:
1743                         // ok, so it is hardcoded - do we really nee to
1744                         // customize it?
1745                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1746                         *result = TRUE;
1747                         break;
1748
1749                     case WM_MOUSEMOVE:
1750                     case WM_LBUTTONDOWN:
1751                     case WM_LBUTTONUP:
1752                     case WM_LBUTTONDBLCLK:
1753                     case WM_RBUTTONDOWN:
1754                     case WM_RBUTTONUP:
1755                     case WM_RBUTTONDBLCLK:
1756                         // send a mouse event
1757                         {
1758                             static const wxEventType eventsMouse[] =
1759                             {
1760                                 wxEVT_MOTION,
1761                                 wxEVT_LEFT_DOWN,
1762                                 wxEVT_LEFT_UP,
1763                                 wxEVT_LEFT_DCLICK,
1764                                 wxEVT_RIGHT_DOWN,
1765                                 wxEVT_RIGHT_UP,
1766                                 wxEVT_RIGHT_DCLICK,
1767                             };
1768
1769                             // the event ids are consecutive
1770                             wxMouseEvent
1771                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1772
1773                             InitMouseEvent(evtMouse,
1774                                            GET_X_LPARAM(enlink->lParam),
1775                                            GET_Y_LPARAM(enlink->lParam),
1776                                            enlink->wParam);
1777
1778                             wxTextUrlEvent event(m_windowId, evtMouse,
1779                                                  enlink->chrg.cpMin,
1780                                                  enlink->chrg.cpMax);
1781
1782                             InitCommandEvent(event);
1783
1784                             *result = ProcessCommand(event);
1785                         }
1786                         break;
1787                 }
1788             }
1789             return TRUE;
1790     }
1791 #endif
1792
1793     // not processed, leave it to the base class
1794     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
1795 }
1796
1797 // ----------------------------------------------------------------------------
1798 // colour setting for the rich edit controls
1799 // ----------------------------------------------------------------------------
1800
1801 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1802 {
1803     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1804     {
1805         // colour didn't really change
1806         return FALSE;
1807     }
1808
1809     if ( IsRich() )
1810     {
1811         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1812         // EM_SETBKGNDCOLOR additionally
1813         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1814     }
1815
1816     return TRUE;
1817 }
1818
1819 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1820 {
1821     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1822     {
1823         // colour didn't really change
1824         return FALSE;
1825     }
1826
1827     if ( IsRich() )
1828     {
1829         // change the colour of everything
1830         CHARFORMAT cf;
1831         wxZeroMemory(cf);
1832         cf.cbSize = sizeof(cf);
1833         cf.dwMask = CFM_COLOR;
1834         cf.crTextColor = wxColourToRGB(colour);
1835         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1836     }
1837
1838     return TRUE;
1839 }
1840
1841 // ----------------------------------------------------------------------------
1842 // styling support for rich edit controls
1843 // ----------------------------------------------------------------------------
1844
1845 #if wxUSE_RICHEDIT
1846
1847 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1848 {
1849 #ifdef __WXWINE__
1850     return FALSE;
1851 #else
1852     if ( !IsRich() )
1853     {
1854         // can't do it with normal text control
1855         return FALSE;
1856     }
1857
1858     // the richedit 1.0 doesn't handle setting background colour, so don't
1859     // even try to do anything if it's the only thing we want to change
1860     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() )
1861     {
1862         // nothing to do: return TRUE if there was really nothing to do and
1863         // FALSE if we failed to set bg colour
1864         return !style.HasBackgroundColour();
1865     }
1866
1867     // order the range if needed
1868     if ( start > end )
1869     {
1870         long tmp = start;
1871         start = end;
1872         end = tmp;
1873     }
1874
1875     // we can only change the format of the selection, so select the range we
1876     // want and restore the old selection later
1877     long startOld, endOld;
1878     GetSelection(&startOld, &endOld);
1879
1880     // but do we really have to change the selection?
1881     bool changeSel = start != startOld || end != endOld;
1882
1883     if ( changeSel )
1884     {
1885         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
1886     }
1887
1888     // initialize CHARFORMAT struct
1889 #if wxUSE_RICHEDIT2
1890     CHARFORMAT2 cf;
1891 #else
1892     CHARFORMAT cf;
1893 #endif
1894
1895     wxZeroMemory(cf);
1896
1897     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
1898     // CHARFORMAT in that case
1899 #if wxUSE_RICHEDIT2
1900     if ( m_verRichEdit == 1 )
1901     {
1902         // this is the only thing the control is going to grok
1903         cf.cbSize = sizeof(CHARFORMAT);
1904     }
1905     else
1906 #endif
1907     {
1908         // CHARFORMAT or CHARFORMAT2
1909         cf.cbSize = sizeof(cf);
1910     }
1911
1912     if ( style.HasFont() )
1913     {
1914         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1915         //     but using it doesn't seem to hurt neither so leaving it for now
1916
1917         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1918                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1919
1920         // fill in data from LOGFONT but recalculate lfHeight because we need
1921         // the real height in twips and not the negative number which
1922         // wxFillLogFont() returns (this is correct in general and works with
1923         // the Windows font mapper, but not here)
1924         LOGFONT lf;
1925         wxFillLogFont(&lf, &style.GetFont());
1926         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1927         cf.bCharSet = lf.lfCharSet;
1928         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1929         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1930
1931         // also deal with underline/italic/bold attributes: note that we must
1932         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1933         // style to allow clearing it
1934         if ( lf.lfItalic )
1935         {
1936             cf.dwEffects |= CFE_ITALIC;
1937         }
1938
1939         if ( lf.lfWeight == FW_BOLD )
1940         {
1941             cf.dwEffects |= CFE_BOLD;
1942         }
1943
1944         if ( lf.lfUnderline )
1945         {
1946             cf.dwEffects |= CFE_UNDERLINE;
1947         }
1948
1949         // strikeout fonts are not supported by wxWindows
1950     }
1951
1952     if ( style.HasTextColour() )
1953     {
1954         cf.dwMask |= CFM_COLOR;
1955         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1956     }
1957
1958 #if wxUSE_RICHEDIT2
1959     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
1960     {
1961         cf.dwMask |= CFM_BACKCOLOR;
1962         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1963     }
1964 #endif // wxUSE_RICHEDIT2
1965
1966     // do format the selection
1967     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1968                             SCF_SELECTION, (LPARAM)&cf) != 0;
1969     if ( !ok )
1970     {
1971         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1972     }
1973
1974     if ( changeSel )
1975     {
1976         // restore the original selection
1977         DoSetSelection(startOld, endOld, FALSE);
1978     }
1979
1980     return ok;
1981 #endif
1982 }
1983
1984 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
1985 {
1986     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
1987         return FALSE;
1988
1989     // we have to do this or the style wouldn't apply for the text typed by the
1990     // user
1991     long posLast = GetLastPosition();
1992     SetStyle(posLast, posLast, m_defaultStyle);
1993
1994     return TRUE;
1995 }
1996
1997 #endif
1998
1999 // ----------------------------------------------------------------------------
2000 // wxRichEditModule
2001 // ----------------------------------------------------------------------------
2002
2003 bool wxRichEditModule::OnInit()
2004 {
2005     // don't do anything - we will load it when needed
2006     return TRUE;
2007 }
2008
2009 void wxRichEditModule::OnExit()
2010 {
2011     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2012     {
2013         if ( ms_hRichEdit[i] )
2014         {
2015             ::FreeLibrary(ms_hRichEdit[i]);
2016         }
2017     }
2018 }
2019
2020 /* static */
2021 bool wxRichEditModule::Load(int version)
2022 {
2023     // we don't support loading richedit 3.0 as I don't know how to distinguish
2024     // it from 2.0 anyhow
2025     wxCHECK_MSG( version == 1 || version == 2, FALSE,
2026                  _T("incorrect richedit control version requested") );
2027
2028     // make it the index in the array
2029     version--;
2030
2031     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2032     {
2033         // we had already tried to load it and failed
2034         return FALSE;
2035     }
2036
2037     if ( ms_hRichEdit[version] )
2038     {
2039         // we've already got this one
2040         return TRUE;
2041     }
2042
2043     wxString dllname = version ? _T("riched20") : _T("riched32");
2044     dllname += _T(".dll");
2045
2046     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2047
2048     if ( !ms_hRichEdit[version] )
2049     {
2050         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2051
2052         ms_hRichEdit[version] = (HINSTANCE)-1;
2053
2054         return FALSE;
2055     }
2056
2057     return TRUE;
2058 }
2059
2060 #endif // wxUSE_RICHEDIT
2061
2062 #endif // wxUSE_TEXTCTRL