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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  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 && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
  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     #include "wx/math.h"
  43 #endif
  44
  45 #include "wx/module.h"
  46
  47 #if wxUSE_CLIPBOARD
  48     #include "wx/clipbrd.h"
  49 #endif
  50
  51 #include "wx/textfile.h"
  52
  53 #include <windowsx.h>
  54
  55 #include "wx/msw/private.h"
  56 #include "wx/msw/winundef.h"
  57
  58 #include <string.h>
  59 #include <stdlib.h>
  60
  61 #ifndef __WXWINCE__
  62 #include <sys/types.h>
  63 #endif
  64
  65 #if wxUSE_RICHEDIT
  66
  67 // old mingw32 has richedit stuff directly in windows.h and doesn't have
  68 // richedit.h at all
  69 #if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__)
  70     #include <richedit.h>
  71 #endif
  72
  73 #include "wx/msw/missing.h"
  74
  75 #endif // wxUSE_RICHEDIT
  76
  77 // ----------------------------------------------------------------------------
  78 // private classes
  79 // ----------------------------------------------------------------------------
  80
  81 #if wxUSE_RICHEDIT
  82
  83 // this module initializes RichEdit DLL(s) if needed
  84 class wxRichEditModule : public wxModule
  85 {
  86 public:
  87     virtual bool OnInit();
  88     virtual void OnExit();
  89
  90     // load the richedit DLL of at least of required version
  91     static bool Load(int version = 1);
  92
  93 private:
  94     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
  95     static HINSTANCE ms_hRichEdit[2];
  96
  97     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
  98 };
  99
 100 HINSTANCE wxRichEditModule::ms_hRichEdit[2] = { NULL, NULL };
 101
 102 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 103
 104 #endif // wxUSE_RICHEDIT
 105
 106 // a small class used to set m_updatesCount to 0 (to filter duplicate events if
 107 // necessary) and to reset it back to -1 afterwards
 108 class UpdatesCountFilter
 109 {
 110 public:
 111     UpdatesCountFilter(int& count)
 112         : m_count(count)
 113     {
 114         wxASSERT_MSG( m_count == -1, _T("wrong initial m_updatesCount value") );
 115
 116         m_count = 0;
 117     }
 118
 119     ~UpdatesCountFilter()
 120     {
 121         m_count = -1;
 122     }
 123
 124     // return true if an event has been received
 125     bool GotUpdate() const
 126     {
 127         return m_count == 1;
 128     }
 129
 130 private:
 131     int& m_count;
 132
 133     DECLARE_NO_COPY_CLASS(UpdatesCountFilter)
 134 };
 135
 136 // ----------------------------------------------------------------------------
 137 // event tables and other macros
 138 // ----------------------------------------------------------------------------
 139
 140 #if wxUSE_EXTENDED_RTTI
 141 WX_DEFINE_FLAGS( wxTextCtrlStyle )
 142
 143 wxBEGIN_FLAGS( wxTextCtrlStyle )
 144     // new style border flags, we put them first to
 145     // use them for streaming out
 146     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
 147     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
 148     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
 149     wxFLAGS_MEMBER(wxBORDER_RAISED)
 150     wxFLAGS_MEMBER(wxBORDER_STATIC)
 151     wxFLAGS_MEMBER(wxBORDER_NONE)
 152
 153     // old style border flags
 154     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
 155     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
 156     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
 157     wxFLAGS_MEMBER(wxRAISED_BORDER)
 158     wxFLAGS_MEMBER(wxSTATIC_BORDER)
 159     wxFLAGS_MEMBER(wxBORDER)
 160
 161     // standard window styles
 162     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
 163     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
 164     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
 165     wxFLAGS_MEMBER(wxWANTS_CHARS)
 166     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
 167     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
 168     wxFLAGS_MEMBER(wxVSCROLL)
 169     wxFLAGS_MEMBER(wxHSCROLL)
 170
 171     wxFLAGS_MEMBER(wxTE_PROCESS_ENTER)
 172     wxFLAGS_MEMBER(wxTE_PROCESS_TAB)
 173     wxFLAGS_MEMBER(wxTE_MULTILINE)
 174     wxFLAGS_MEMBER(wxTE_PASSWORD)
 175     wxFLAGS_MEMBER(wxTE_READONLY)
 176     wxFLAGS_MEMBER(wxHSCROLL)
 177     wxFLAGS_MEMBER(wxTE_RICH)
 178     wxFLAGS_MEMBER(wxTE_RICH2)
 179     wxFLAGS_MEMBER(wxTE_AUTO_URL)
 180     wxFLAGS_MEMBER(wxTE_NOHIDESEL)
 181     wxFLAGS_MEMBER(wxTE_LEFT)
 182     wxFLAGS_MEMBER(wxTE_CENTRE)
 183     wxFLAGS_MEMBER(wxTE_RIGHT)
 184     wxFLAGS_MEMBER(wxTE_DONTWRAP)
 185     wxFLAGS_MEMBER(wxTE_LINEWRAP)
 186     wxFLAGS_MEMBER(wxTE_WORDWRAP)
 187
 188 wxEND_FLAGS( wxTextCtrlStyle )
 189
 190 IMPLEMENT_DYNAMIC_CLASS_XTI(wxTextCtrl, wxControl,"wx/textctrl.h")
 191
 192 wxBEGIN_PROPERTIES_TABLE(wxTextCtrl)
 193     wxEVENT_PROPERTY( TextUpdated , wxEVT_COMMAND_TEXT_UPDATED , wxCommandEvent )
 194     wxEVENT_PROPERTY( TextEnter , wxEVT_COMMAND_TEXT_ENTER , wxCommandEvent )
 195
 196     wxPROPERTY( Font , wxFont , SetFont , GetFont  , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 197     wxPROPERTY( Value , wxString , SetValue, GetValue, wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 198     wxPROPERTY_FLAGS( WindowStyle , wxTextCtrlStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 199 wxEND_PROPERTIES_TABLE()
 200
 201 wxBEGIN_HANDLERS_TABLE(wxTextCtrl)
 202 wxEND_HANDLERS_TABLE()
 203
 204 wxCONSTRUCTOR_6( wxTextCtrl , wxWindow* , Parent , wxWindowID , Id , wxString , Value , wxPoint , Position , wxSize , Size , long , WindowStyle)
 205 #else
 206 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 207 #endif
 208
 209
 210 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 211     EVT_CHAR(wxTextCtrl::OnChar)
 212     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 213
 214 #if wxUSE_RICHEDIT
 215     EVT_CONTEXT_MENU(wxTextCtrl::OnContextMenu)
 216 #endif
 217
 218     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 219     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 220     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 221     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 222     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 223     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 224     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 225
 226     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 227     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 228     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 229     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 230     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 231     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 232     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 233
 234     EVT_SET_FOCUS(wxTextCtrl::OnSetFocus)
 235 END_EVENT_TABLE()
 236
 237 // ============================================================================
 238 // implementation
 239 // ============================================================================
 240
 241 // ----------------------------------------------------------------------------
 242 // creation
 243 // ----------------------------------------------------------------------------
 244
 245 void wxTextCtrl::Init()
 246 {
 247 #if wxUSE_RICHEDIT
 248     m_verRichEdit = 0;
 249 #endif // wxUSE_RICHEDIT
 250
 251     m_privateContextMenu = NULL;
 252     m_updatesCount = -1;
 253     m_isNativeCaretShown = true;
 254 }
 255
 256 wxTextCtrl::~wxTextCtrl()
 257 {
 258     delete m_privateContextMenu;
 259 }
 260
 261 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 262                         const wxString& value,
 263                         const wxPoint& pos,
 264                         const wxSize& size,
 265                         long style,
 266                         const wxValidator& validator,
 267                         const wxString& name)
 268 {
 269 #ifdef __WXWINCE__
 270     if ((style & wxBORDER_MASK) == 0)
 271         style |= wxBORDER_SIMPLE;
 272 #endif
 273
 274     // base initialization
 275     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 276         return false;
 277
 278     // translate wxWin style flags to MSW ones
 279     WXDWORD msStyle = MSWGetCreateWindowFlags();
 280
 281     // do create the control - either an EDIT or RICHEDIT
 282     wxString windowClass = wxT("EDIT");
 283
 284 #if wxUSE_RICHEDIT
 285     if ( m_windowStyle & wxTE_AUTO_URL )
 286     {
 287         // automatic URL detection only works in RichEdit 2.0+
 288         m_windowStyle |= wxTE_RICH2;
 289     }
 290
 291     if ( m_windowStyle & wxTE_RICH2 )
 292     {
 293         // using richedit 2.0 implies using wxTE_RICH
 294         m_windowStyle |= wxTE_RICH;
 295     }
 296
 297     // we need to load the richedit DLL before creating the rich edit control
 298     if ( m_windowStyle & wxTE_RICH )
 299     {
 300         static bool s_errorGiven = false;// MT-FIXME
 301
 302         // Which version do we need? Use 1.0 by default because it is much more
 303         // like the the standard EDIT or 2.0 if explicitly requested, but use
 304         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 305         //
 306         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 307         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 308         //       should use 3.0 if available as it is the best of both worlds -
 309         //       but as I can't test it right now I don't do it (VZ)
 310 #if wxUSE_UNICODE
 311         const int verRichEdit = 2;
 312 #else // !wxUSE_UNICODE
 313         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 314 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 315
 316         // only give the error msg once if the DLL can't be loaded
 317         if ( !s_errorGiven )
 318         {
 319             // try to load the RichEdit DLL (will do nothing if already done)
 320             if ( !wxRichEditModule::Load(verRichEdit) )
 321             {
 322 #if !wxUSE_UNICODE
 323                 // try another version?
 324                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 325
 326                 if ( !wxRichEditModule::Load(verRichEdit) )
 327 #endif // wxUSE_UNICODE
 328                 {
 329                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 330
 331                     s_errorGiven = true;
 332                 }
 333             }
 334         }
 335
 336         // have we managed to load any richedit version?
 337         if ( !s_errorGiven )
 338         {
 339             m_verRichEdit = verRichEdit;
 340             if ( m_verRichEdit == 1 )
 341             {
 342                 windowClass = wxT("RICHEDIT");
 343             }
 344             else
 345             {
 346 #ifndef RICHEDIT_CLASS
 347                 wxString RICHEDIT_CLASS;
 348                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 349 #if wxUSE_UNICODE
 350                 RICHEDIT_CLASS += _T('W');
 351 #else // ANSI
 352                 RICHEDIT_CLASS += _T('A');
 353 #endif // Unicode/ANSI
 354 #endif // !RICHEDIT_CLASS
 355
 356                 windowClass = RICHEDIT_CLASS;
 357             }
 358         }
 359     }
 360 #endif // wxUSE_RICHEDIT
 361
 362     // we need to turn '\n's into "\r\n"s for the multiline controls
 363     wxString valueWin;
 364     if ( m_windowStyle & wxTE_MULTILINE )
 365     {
 366         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 367     }
 368     else // single line
 369     {
 370         valueWin = value;
 371     }
 372
 373     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 374         return false;
 375
 376 #if wxUSE_RICHEDIT
 377     if ( IsRich() )
 378     {
 379         // enable the events we're interested in: we want to get EN_CHANGE as
 380         // for the normal controls
 381         LPARAM mask = ENM_CHANGE;
 382
 383         if ( GetRichVersion() == 1 )
 384         {
 385             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 386             // explained in its handler
 387            mask |= ENM_MOUSEEVENTS;
 388         }
 389         else if ( m_windowStyle & wxTE_AUTO_URL )
 390         {
 391             mask |= ENM_LINK;
 392
 393             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 394         }
 395
 396         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 397     }
 398 #endif // wxUSE_RICHEDIT
 399
 400     return true;
 401 }
 402
 403 // Make sure the window style (etc.) reflects the HWND style (roughly)
 404 void wxTextCtrl::AdoptAttributesFromHWND()
 405 {
 406     wxWindow::AdoptAttributesFromHWND();
 407
 408     HWND hWnd = GetHwnd();
 409     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 410
 411     // retrieve the style to see whether this is an edit or richedit ctrl
 412 #if wxUSE_RICHEDIT
 413     wxString classname = wxGetWindowClass(GetHWND());
 414
 415     if ( classname.IsSameAs(_T("EDIT"), false /* no case */) )
 416     {
 417         m_verRichEdit = 0;
 418     }
 419     else // rich edit?
 420     {
 421         wxChar c;
 422         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 423         {
 424             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 425
 426             m_verRichEdit = 0;
 427         }
 428     }
 429 #endif // wxUSE_RICHEDIT
 430
 431     if (style & ES_MULTILINE)
 432         m_windowStyle |= wxTE_MULTILINE;
 433     if (style & ES_PASSWORD)
 434         m_windowStyle |= wxTE_PASSWORD;
 435     if (style & ES_READONLY)
 436         m_windowStyle |= wxTE_READONLY;
 437     if (style & ES_WANTRETURN)
 438         m_windowStyle |= wxTE_PROCESS_ENTER;
 439     if (style & ES_CENTER)
 440         m_windowStyle |= wxTE_CENTRE;
 441     if (style & ES_RIGHT)
 442         m_windowStyle |= wxTE_RIGHT;
 443 }
 444
 445 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 446 {
 447     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 448
 449     // styles which we alaways add by default
 450     if ( style & wxTE_MULTILINE )
 451     {
 452         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 453                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 454
 455         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 456         if ( !(style & wxTE_NO_VSCROLL) )
 457         {
 458             // always adjust the vertical scrollbar automatically if we have it
 459             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 460
 461 #if wxUSE_RICHEDIT
 462             // we have to use this style for the rich edit controls because
 463             // without it the vertical scrollbar never appears at all in
 464             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 465             if ( style & wxTE_RICH2 )
 466             {
 467                 msStyle |= ES_DISABLENOSCROLL;
 468             }
 469 #endif // wxUSE_RICHEDIT
 470         }
 471
 472         style |= wxTE_PROCESS_ENTER;
 473     }
 474     else // !multiline
 475     {
 476         // there is really no reason to not have this style for single line
 477         // text controls
 478         msStyle |= ES_AUTOHSCROLL;
 479     }
 480
 481     // note that wxTE_DONTWRAP is the same as wxHSCROLL so if we have a horz
 482     // scrollbar, there is no wrapping -- which makes sense
 483     if ( style & wxTE_DONTWRAP )
 484     {
 485         // automatically scroll the control horizontally as necessary
 486         //
 487         // NB: ES_AUTOHSCROLL is needed for richedit controls or they don't
 488         //     show horz scrollbar at all, even in spite of WS_HSCROLL, and as
 489         //     it doesn't seem to do any harm for plain edit controls, add it
 490         //     always
 491         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 492     }
 493
 494     if ( style & wxTE_READONLY )
 495         msStyle |= ES_READONLY;
 496
 497     if ( style & wxTE_PASSWORD )
 498         msStyle |= ES_PASSWORD;
 499
 500     if ( style & wxTE_NOHIDESEL )
 501         msStyle |= ES_NOHIDESEL;
 502
 503     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 504     if ( style & wxTE_CENTRE )
 505         msStyle |= ES_CENTER;
 506     else if ( style & wxTE_RIGHT )
 507         msStyle |= ES_RIGHT;
 508     else
 509         msStyle |= ES_LEFT; // ES_LEFT is 0 as well but for consistency...
 510
 511     return msStyle;
 512 }
 513
 514 void wxTextCtrl::SetWindowStyleFlag(long style)
 515 {
 516 #if wxUSE_RICHEDIT
 517     // we have to deal with some styles separately because they can't be
 518     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 519     // using richedit-specific EM_SETOPTIONS
 520     if ( IsRich() &&
 521             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 522     {
 523         bool set = (style & wxTE_NOHIDESEL) != 0;
 524
 525         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 526                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 527     }
 528 #endif // wxUSE_RICHEDIT
 529
 530     wxControl::SetWindowStyleFlag(style);
 531 }
 532
 533 // ----------------------------------------------------------------------------
 534 // set/get the controls text
 535 // ----------------------------------------------------------------------------
 536
 537 wxString wxTextCtrl::GetValue() const
 538 {
 539     // range 0..-1 is special for GetRange() and means to retrieve all text
 540     return GetRange(0, -1);
 541 }
 542
 543 wxString wxTextCtrl::GetRange(long from, long to) const
 544 {
 545     wxString str;
 546
 547     if ( from >= to && to != -1 )
 548     {
 549         // nothing to retrieve
 550         return str;
 551     }
 552
 553 #if wxUSE_RICHEDIT
 554     if ( IsRich() )
 555     {
 556         int len = GetWindowTextLength(GetHwnd());
 557         if ( len > from )
 558         {
 559             if ( to == -1 )
 560                 to = len;
 561
 562 #if !wxUSE_UNICODE
 563             // we must use EM_STREAMOUT if we don't want to lose all characters
 564             // not representable in the current character set (EM_GETTEXTRANGE
 565             // simply replaces them with question marks...)
 566             if ( GetRichVersion() > 1 )
 567             {
 568                 // we must have some encoding, otherwise any 8bit chars in the
 569                 // control are simply *lost* (replaced by '?')
 570                 wxFontEncoding encoding = wxFONTENCODING_SYSTEM;
 571
 572                 wxFont font = m_defaultStyle.GetFont();
 573                 if ( !font.Ok() )
 574                     font = GetFont();
 575
 576                 if ( font.Ok() )
 577                 {
 578                    encoding = font.GetEncoding();
 579                 }
 580
 581                 if ( encoding == wxFONTENCODING_SYSTEM )
 582                 {
 583                     encoding = wxLocale::GetSystemEncoding();
 584                 }
 585
 586                 if ( encoding == wxFONTENCODING_SYSTEM )
 587                 {
 588                     encoding = wxFONTENCODING_ISO8859_1;
 589                 }
 590
 591                 str = StreamOut(encoding);
 592
 593                 if ( !str.empty() )
 594                 {
 595                     // we have to manually extract the required part, luckily
 596                     // this is easy in this case as EOL characters in str are
 597                     // just LFs because we remove CRs in wxRichEditStreamOut
 598                     str = str.Mid(from, to - from);
 599                 }
 600             }
 601
 602             // StreamOut() wasn't used or failed, try to do it in normal way
 603             if ( str.empty() )
 604 #endif // !wxUSE_UNICODE
 605             {
 606                 // alloc one extra WORD as needed by the control
 607                 wxStringBuffer tmp(str, ++len);
 608                 wxChar *p = tmp;
 609
 610                 TEXTRANGE textRange;
 611                 textRange.chrg.cpMin = from;
 612                 textRange.chrg.cpMax = to;
 613                 textRange.lpstrText = p;
 614
 615                 (void)::SendMessage(GetHwnd(), EM_GETTEXTRANGE,
 616                                     0, (LPARAM)&textRange);
 617
 618                 if ( m_verRichEdit > 1 )
 619                 {
 620                     // RichEdit 2.0 uses just CR ('\r') for the
 621                     // newlines which is neither Unix nor Windows
 622                     // style - convert it to something reasonable
 623                     for ( ; *p; p++ )
 624                     {
 625                         if ( *p == _T('\r') )
 626                             *p = _T('\n');
 627                     }
 628                 }
 629             }
 630
 631             if ( m_verRichEdit == 1 )
 632             {
 633                 // convert to the canonical form - see comment below
 634                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 635             }
 636         }
 637         //else: no text at all, leave the string empty
 638     }
 639     else
 640 #endif // wxUSE_RICHEDIT
 641     {
 642         // retrieve all text
 643         str = wxGetWindowText(GetHWND());
 644
 645         // need only a range?
 646         if ( from < to )
 647         {
 648             str = str.Mid(from, to - from);
 649         }
 650
 651         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 652         // canonical one (same one as above) for consistency with the other kinds
 653         // of controls and, more importantly, with the other ports
 654         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 655     }
 656
 657     return str;
 658 }
 659
 660 void wxTextCtrl::SetValue(const wxString& value)
 661 {
 662     // if the text is long enough, it's faster to just set it instead of first
 663     // comparing it with the old one (chances are that it will be different
 664     // anyhow, this comparison is there to avoid flicker for small single-line
 665     // edit controls mostly)
 666     if ( (value.length() > 0x400) || (value != GetValue()) )
 667     {
 668         DoWriteText(value, false /* not selection only */);
 669
 670         // for compatibility, don't move the cursor when doing SetValue()
 671         SetInsertionPoint(0);
 672     }
 673     else // same text
 674     {
 675         // still send an event for consistency
 676         SendUpdateEvent();
 677     }
 678
 679     // we should reset the modified flag even if the value didn't really change
 680
 681     // mark the control as being not dirty - we changed its text, not the
 682     // user
 683     DiscardEdits();
 684 }
 685
 686 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 687
 688 // TODO: using memcpy() would improve performance a lot for big amounts of text
 689
 690 DWORD CALLBACK
 691 wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 692 {
 693     *pcb = 0;
 694
 695     const wchar_t ** const ppws = (const wchar_t **)dwCookie;
 696
 697     wchar_t *wbuf = (wchar_t *)buf;
 698     const wchar_t *wpc = *ppws;
 699     while ( cb && *wpc )
 700     {
 701         *wbuf++ = *wpc++;
 702
 703         cb -= sizeof(wchar_t);
 704         (*pcb) += sizeof(wchar_t);
 705     }
 706
 707     *ppws = wpc;
 708
 709     return 0;
 710 }
 711
 712 // helper struct used to pass parameters from wxTextCtrl to wxRichEditStreamOut
 713 struct wxStreamOutData
 714 {
 715     wchar_t *wpc;
 716     size_t len;
 717 };
 718
 719 DWORD CALLBACK
 720 wxRichEditStreamOut(DWORD_PTR dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 721 {
 722     *pcb = 0;
 723
 724     wxStreamOutData *data = (wxStreamOutData *)dwCookie;
 725
 726     const wchar_t *wbuf = (const wchar_t *)buf;
 727     wchar_t *wpc = data->wpc;
 728     while ( cb )
 729     {
 730         wchar_t wch = *wbuf++;
 731
 732         // turn "\r\n" into "\n" on the fly
 733         if ( wch != L'\r' )
 734             *wpc++ = wch;
 735         else
 736             data->len--;
 737
 738         cb -= sizeof(wchar_t);
 739         (*pcb) += sizeof(wchar_t);
 740     }
 741
 742     data->wpc = wpc;
 743
 744     return 0;
 745 }
 746
 747
 748 #if wxUSE_UNICODE_MSLU
 749     #define UNUSED_IF_MSLU(param)
 750 #else
 751     #define UNUSED_IF_MSLU(param) param
 752 #endif
 753
 754 bool
 755 wxTextCtrl::StreamIn(const wxString& value,
 756                      wxFontEncoding UNUSED_IF_MSLU(encoding),
 757                      bool selectionOnly)
 758 {
 759 #if wxUSE_UNICODE_MSLU
 760     const wchar_t *wpc = value.c_str();
 761 #else // !wxUSE_UNICODE_MSLU
 762     wxCSConv conv(encoding);
 763
 764     const size_t len = conv.MB2WC(NULL, value, value.length());
 765
 766 #if wxUSE_WCHAR_T
 767     wxWCharBuffer wchBuf(len);
 768     wchar_t *wpc = wchBuf.data();
 769 #else
 770     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 771     wchar_t *wpc = wchBuf;
 772 #endif
 773
 774     conv.MB2WC(wpc, value, value.length());
 775 #endif // wxUSE_UNICODE_MSLU
 776
 777     // finally, stream it in the control
 778     EDITSTREAM eds;
 779     wxZeroMemory(eds);
 780     eds.dwCookie = (DWORD)&wpc;
 781     // the cast below is needed for broken (very) old mingw32 headers
 782     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 783
 784     // same problem as in DoWriteText(): we can get multiple events here
 785     UpdatesCountFilter ucf(m_updatesCount);
 786
 787     ::SendMessage(GetHwnd(), EM_STREAMIN,
 788                   SF_TEXT |
 789                   SF_UNICODE |
 790                   (selectionOnly ? SFF_SELECTION : 0),
 791                   (LPARAM)&eds);
 792
 793     wxASSERT_MSG( ucf.GotUpdate(), _T("EM_STREAMIN didn't send EN_UPDATE?") );
 794
 795     if ( eds.dwError )
 796     {
 797         wxLogLastError(_T("EM_STREAMIN"));
 798     }
 799
 800 #if !wxUSE_WCHAR_T
 801     free(wchBuf);
 802 #endif // !wxUSE_WCHAR_T
 803
 804     return true;
 805 }
 806
 807 #if !wxUSE_UNICODE_MSLU
 808
 809 wxString
 810 wxTextCtrl::StreamOut(wxFontEncoding encoding, bool selectionOnly) const
 811 {
 812     wxString out;
 813
 814     const int len = GetWindowTextLength(GetHwnd());
 815
 816 #if wxUSE_WCHAR_T
 817     wxWCharBuffer wchBuf(len);
 818     wchar_t *wpc = wchBuf.data();
 819 #else
 820     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 821     wchar_t *wpc = wchBuf;
 822 #endif
 823
 824     wxStreamOutData data;
 825     data.wpc = wpc;
 826     data.len = len;
 827
 828     EDITSTREAM eds;
 829     wxZeroMemory(eds);
 830     eds.dwCookie = (DWORD)&data;
 831     eds.pfnCallback = wxRichEditStreamOut;
 832
 833     ::SendMessage
 834       (
 835         GetHwnd(),
 836         EM_STREAMOUT,
 837         SF_TEXT | SF_UNICODE | (selectionOnly ? SFF_SELECTION : 0),
 838         (LPARAM)&eds
 839       );
 840
 841     if ( eds.dwError )
 842     {
 843         wxLogLastError(_T("EM_STREAMOUT"));
 844     }
 845     else // streamed out ok
 846     {
 847         // NUL-terminate the string because its length could have been
 848         // decreased by wxRichEditStreamOut
 849         *(wchBuf.data() + data.len) = L'\0';
 850
 851         // now convert to the given encoding (this is a possibly lossful
 852         // conversion but what else can we do)
 853         wxCSConv conv(encoding);
 854         size_t lenNeeded = conv.WC2MB(NULL, wchBuf, 0);
 855         if ( lenNeeded++ )
 856         {
 857             conv.WC2MB(wxStringBuffer(out, lenNeeded), wchBuf, lenNeeded);
 858         }
 859     }
 860
 861 #if !wxUSE_WCHAR_T
 862     free(wchBuf);
 863 #endif // !wxUSE_WCHAR_T
 864
 865     return out;
 866 }
 867
 868 #endif // !wxUSE_UNICODE_MSLU
 869
 870 #endif // wxUSE_RICHEDIT
 871
 872 void wxTextCtrl::WriteText(const wxString& value)
 873 {
 874     DoWriteText(value);
 875 }
 876
 877 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 878 {
 879     wxString valueDos;
 880     if ( m_windowStyle & wxTE_MULTILINE )
 881         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 882     else
 883         valueDos = value;
 884
 885 #if wxUSE_RICHEDIT
 886     // there are several complications with the rich edit controls here
 887     bool done = false;
 888     if ( IsRich() )
 889     {
 890         // first, ensure that the new text will be in the default style
 891         if ( !m_defaultStyle.IsDefault() )
 892         {
 893             long start, end;
 894             GetSelection(&start, &end);
 895             SetStyle(start, end, m_defaultStyle);
 896         }
 897
 898 #if wxUSE_UNICODE_MSLU
 899         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 900         // but EM_STREAMIN works
 901         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 902         {
 903            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 904         }
 905 #endif // wxUSE_UNICODE_MSLU
 906
 907 #if !wxUSE_UNICODE
 908         // next check if the text we're inserting must be shown in a non
 909         // default charset -- this only works for RichEdit > 1.0
 910         if ( GetRichVersion() > 1 )
 911         {
 912             wxFont font = m_defaultStyle.GetFont();
 913             if ( !font.Ok() )
 914                 font = GetFont();
 915
 916             if ( font.Ok() )
 917             {
 918                wxFontEncoding encoding = font.GetEncoding();
 919                if ( encoding != wxFONTENCODING_SYSTEM )
 920                {
 921                    // we have to use EM_STREAMIN to force richedit control 2.0+
 922                    // to show any text in the non default charset -- otherwise
 923                    // it thinks it knows better than we do and always shows it
 924                    // in the default one
 925                    done = StreamIn(valueDos, encoding, selectionOnly);
 926                }
 927             }
 928         }
 929 #endif // !wxUSE_UNICODE
 930     }
 931
 932     if ( !done )
 933 #endif // wxUSE_RICHEDIT
 934     {
 935         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
 936         // call (this happens for plain EDITs with EM_REPLACESEL and under some
 937         // -- undetermined -- conditions with rich edit) and sometimes we don't
 938         // get any events at all (plain EDIT with WM_SETTEXT), so ensure that
 939         // we generate exactly one of them by ignoring all but the first one in
 940         // SendUpdateEvent() and generating one ourselves if we hadn't got any
 941         // notifications from Windows
 942         UpdatesCountFilter ucf(m_updatesCount);
 943
 944         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 945                       0, (LPARAM)valueDos.c_str());
 946
 947         if ( !ucf.GotUpdate() )
 948         {
 949             SendUpdateEvent();
 950         }
 951     }
 952 }
 953
 954 void wxTextCtrl::AppendText(const wxString& text)
 955 {
 956     SetInsertionPointEnd();
 957
 958     WriteText(text);
 959
 960 #if wxUSE_RICHEDIT
 961     // don't do this if we're frozen, saves some time
 962     if ( !IsFrozen() && IsMultiLine() && GetRichVersion() > 1 )
 963     {
 964         // setting the caret to the end and showing it simply doesn't work for
 965         // RichEdit 2.0 -- force it to still do what we want
 966         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
 967     }
 968 #endif // wxUSE_RICHEDIT
 969 }
 970
 971 void wxTextCtrl::Clear()
 972 {
 973     ::SetWindowText(GetHwnd(), wxEmptyString);
 974
 975 #if wxUSE_RICHEDIT
 976     if ( !IsRich() )
 977 #endif // wxUSE_RICHEDIT
 978     {
 979         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 980         // but the normal ones don't -- make Clear() behaviour consistent by
 981         // always sending this event
 982
 983         // Windows already sends an update event for single-line
 984         // controls.
 985         if ( m_windowStyle & wxTE_MULTILINE )
 986             SendUpdateEvent();
 987     }
 988 }
 989
 990 #ifdef __WIN32__
 991
 992 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 993 {
 994     SetFocus();
 995
 996     size_t lenOld = GetValue().length();
 997
 998     wxUint32 code = event.GetRawKeyCode();
 999     ::keybd_event((BYTE)code, 0, 0 /* key press */, 0);
1000     ::keybd_event((BYTE)code, 0, KEYEVENTF_KEYUP, 0);
1001
1002     // assume that any alphanumeric key changes the total number of characters
1003     // in the control - this should work in 99% of cases
1004     return GetValue().length() != lenOld;
1005 }
1006
1007 #endif // __WIN32__
1008
1009 // ----------------------------------------------------------------------------
1010 // Clipboard operations
1011 // ----------------------------------------------------------------------------
1012
1013 void wxTextCtrl::Copy()
1014 {
1015     if (CanCopy())
1016     {
1017         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
1018     }
1019 }
1020
1021 void wxTextCtrl::Cut()
1022 {
1023     if (CanCut())
1024     {
1025         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
1026     }
1027 }
1028
1029 void wxTextCtrl::Paste()
1030 {
1031     if (CanPaste())
1032     {
1033         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
1034     }
1035 }
1036
1037 bool wxTextCtrl::HasSelection() const
1038 {
1039     long from, to;
1040     GetSelection(&from, &to);
1041     return from != to;
1042 }
1043
1044 bool wxTextCtrl::CanCopy() const
1045 {
1046     // Can copy if there's a selection
1047     return HasSelection();
1048 }
1049
1050 bool wxTextCtrl::CanCut() const
1051 {
1052     return CanCopy() && IsEditable();
1053 }
1054
1055 bool wxTextCtrl::CanPaste() const
1056 {
1057     if ( !IsEditable() )
1058         return false;
1059
1060 #if wxUSE_RICHEDIT
1061     if ( IsRich() )
1062     {
1063         UINT cf = 0; // 0 == any format
1064
1065         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
1066     }
1067 #endif // wxUSE_RICHEDIT
1068
1069     // Standard edit control: check for straight text on clipboard
1070     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
1071         return false;
1072
1073     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
1074     ::CloseClipboard();
1075
1076     return isTextAvailable;
1077 }
1078
1079 // ----------------------------------------------------------------------------
1080 // Accessors
1081 // ----------------------------------------------------------------------------
1082
1083 void wxTextCtrl::SetEditable(bool editable)
1084 {
1085     HWND hWnd = GetHwnd();
1086     ::SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
1087 }
1088
1089 void wxTextCtrl::SetInsertionPoint(long pos)
1090 {
1091     DoSetSelection(pos, pos);
1092 }
1093
1094 void wxTextCtrl::SetInsertionPointEnd()
1095 {
1096     // we must not do anything if the caret is already there because calling
1097     // SetInsertionPoint() thaws the controls if Freeze() had been called even
1098     // if it doesn't actually move the caret anywhere and so the simple fact of
1099     // doing it results in horrible flicker when appending big amounts of text
1100     // to the control in a few chunks (see DoAddText() test in the text sample)
1101     if ( GetInsertionPoint() == GetLastPosition() )
1102     {
1103         return;
1104     }
1105
1106     long pos;
1107
1108 #if wxUSE_RICHEDIT
1109     if ( m_verRichEdit == 1 )
1110     {
1111         // we don't have to waste time calling GetLastPosition() in this case
1112         pos = -1;
1113     }
1114     else // !RichEdit 1.0
1115 #endif // wxUSE_RICHEDIT
1116     {
1117         pos = GetLastPosition();
1118     }
1119
1120     SetInsertionPoint(pos);
1121 }
1122
1123 long wxTextCtrl::GetInsertionPoint() const
1124 {
1125 #if wxUSE_RICHEDIT
1126     if ( IsRich() )
1127     {
1128         CHARRANGE range;
1129         range.cpMin = 0;
1130         range.cpMax = 0;
1131         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
1132         return range.cpMin;
1133     }
1134 #endif // wxUSE_RICHEDIT
1135
1136     DWORD Pos = (DWORD)::SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
1137     return Pos & 0xFFFF;
1138 }
1139
1140 wxTextPos wxTextCtrl::GetLastPosition() const
1141 {
1142     int numLines = GetNumberOfLines();
1143     long posStartLastLine = XYToPosition(0, numLines - 1);
1144
1145     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
1146
1147     return posStartLastLine + lenLastLine;
1148 }
1149
1150 // If the return values from and to are the same, there is no
1151 // selection.
1152 void wxTextCtrl::GetSelection(long* from, long* to) const
1153 {
1154 #if wxUSE_RICHEDIT
1155     if ( IsRich() )
1156     {
1157         CHARRANGE charRange;
1158         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
1159
1160         *from = charRange.cpMin;
1161         *to = charRange.cpMax;
1162     }
1163     else
1164 #endif // !wxUSE_RICHEDIT
1165     {
1166         DWORD dwStart, dwEnd;
1167         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
1168
1169         *from = dwStart;
1170         *to = dwEnd;
1171     }
1172 }
1173
1174 bool wxTextCtrl::IsEditable() const
1175 {
1176     // strangely enough, we may be called before the control is created: our
1177     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
1178     // us
1179     if ( !m_hWnd )
1180         return true;
1181
1182     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1183
1184     return (style & ES_READONLY) == 0;
1185 }
1186
1187 // ----------------------------------------------------------------------------
1188 // selection
1189 // ----------------------------------------------------------------------------
1190
1191 void wxTextCtrl::SetSelection(long from, long to)
1192 {
1193     // if from and to are both -1, it means (in wxWidgets) that all text should
1194     // be selected - translate into Windows convention
1195     if ( (from == -1) && (to == -1) )
1196     {
1197         from = 0;
1198         to = -1;
1199     }
1200
1201     DoSetSelection(from, to);
1202 }
1203
1204 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
1205 {
1206     HWND hWnd = GetHwnd();
1207
1208 #if wxUSE_RICHEDIT
1209     if ( IsRich() )
1210     {
1211         CHARRANGE range;
1212         range.cpMin = from;
1213         range.cpMax = to;
1214         ::SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
1215     }
1216     else
1217 #endif // wxUSE_RICHEDIT
1218     {
1219         ::SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
1220     }
1221
1222     if ( scrollCaret && !IsFrozen() )
1223     {
1224 #if wxUSE_RICHEDIT
1225         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1226         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1227         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1228         // option is set (but it does work ok in richedit 1.0 mode...)
1229         //
1230         // so to make it work we either need to give focus to it here which
1231         // will probably create many problems (dummy focus events; window
1232         // containing the text control being brought to foreground
1233         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1234         // create other problems too -- and in fact it does because if we turn
1235         // on/off this style while appending the text to the control, the
1236         // vertical scrollbar never appears in it even if we append tons of
1237         // text and to work around this the only solution I found was to use
1238         // ES_DISABLENOSCROLL
1239         //
1240         // this is very ugly but I don't see any other way to make this work
1241         if ( GetRichVersion() > 1 )
1242         {
1243             if ( !HasFlag(wxTE_NOHIDESEL) )
1244             {
1245                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1246                               ECOOP_OR, ECO_NOHIDESEL);
1247             }
1248             //else: everything is already ok
1249         }
1250 #endif // wxUSE_RICHEDIT
1251
1252         ::SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1253
1254 #if wxUSE_RICHEDIT
1255         // restore ECO_NOHIDESEL if we changed it
1256         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1257         {
1258             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1259                           ECOOP_AND, ~ECO_NOHIDESEL);
1260         }
1261 #endif // wxUSE_RICHEDIT
1262     }
1263 }
1264
1265 // ----------------------------------------------------------------------------
1266 // Working with files
1267 // ----------------------------------------------------------------------------
1268
1269 bool wxTextCtrl::LoadFile(const wxString& file)
1270 {
1271     if ( wxTextCtrlBase::LoadFile(file) )
1272     {
1273         // update the size limit if needed
1274         AdjustSpaceLimit();
1275
1276         return true;
1277     }
1278
1279     return false;
1280 }
1281
1282 // ----------------------------------------------------------------------------
1283 // Editing
1284 // ----------------------------------------------------------------------------
1285
1286 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1287 {
1288     // Set selection and remove it
1289     DoSetSelection(from, to, false /* don't scroll caret into view */);
1290
1291     DoWriteText(value, true /* selection only */);
1292 }
1293
1294 void wxTextCtrl::Remove(long from, long to)
1295 {
1296     Replace(from, to, wxEmptyString);
1297 }
1298
1299 bool wxTextCtrl::IsModified() const
1300 {
1301     return ::SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1302 }
1303
1304 void wxTextCtrl::MarkDirty()
1305 {
1306     ::SendMessage(GetHwnd(), EM_SETMODIFY, TRUE, 0L);
1307 }
1308
1309 void wxTextCtrl::DiscardEdits()
1310 {
1311     ::SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1312 }
1313
1314 int wxTextCtrl::GetNumberOfLines() const
1315 {
1316     return (int)::SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1317 }
1318
1319 // ----------------------------------------------------------------------------
1320 // Positions <-> coords
1321 // ----------------------------------------------------------------------------
1322
1323 long wxTextCtrl::XYToPosition(long x, long y) const
1324 {
1325     // This gets the char index for the _beginning_ of this line
1326     long charIndex = ::SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1327
1328     return charIndex + x;
1329 }
1330
1331 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1332 {
1333     HWND hWnd = GetHwnd();
1334
1335     // This gets the line number containing the character
1336     long lineNo;
1337 #if wxUSE_RICHEDIT
1338     if ( IsRich() )
1339     {
1340         lineNo = ::SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1341     }
1342     else
1343 #endif // wxUSE_RICHEDIT
1344     {
1345         lineNo = ::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1346     }
1347
1348     if ( lineNo == -1 )
1349     {
1350         // no such line
1351         return false;
1352     }
1353
1354     // This gets the char index for the _beginning_ of this line
1355     long charIndex = ::SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1356     if ( charIndex == -1 )
1357     {
1358         return false;
1359     }
1360
1361     // The X position must therefore be the different between pos and charIndex
1362     if ( x )
1363         *x = pos - charIndex;
1364     if ( y )
1365         *y = lineNo;
1366
1367     return true;
1368 }
1369
1370 wxTextCtrlHitTestResult
1371 wxTextCtrl::HitTest(const wxPoint& pt, long *posOut) const
1372 {
1373     // first get the position from Windows
1374     LPARAM lParam;
1375
1376 #if wxUSE_RICHEDIT
1377     POINTL ptl;
1378     if ( IsRich() )
1379     {
1380         // for rich edit controls the position is passed iva the struct fields
1381         ptl.x = pt.x;
1382         ptl.y = pt.y;
1383         lParam = (LPARAM)&ptl;
1384     }
1385     else
1386 #endif // wxUSE_RICHEDIT
1387     {
1388         // for the plain ones, we are limited to 16 bit positions which are
1389         // combined in a single 32 bit value
1390         lParam = MAKELPARAM(pt.x, pt.y);
1391     }
1392
1393     LRESULT pos = ::SendMessage(GetHwnd(), EM_CHARFROMPOS, 0, lParam);
1394
1395     if ( pos == -1 )
1396     {
1397         // this seems to indicate an error...
1398         return wxTE_HT_UNKNOWN;
1399     }
1400
1401 #if wxUSE_RICHEDIT
1402     if ( !IsRich() )
1403 #endif // wxUSE_RICHEDIT
1404     {
1405         // for plain EDIT controls the higher word contains something else
1406         pos = LOWORD(pos);
1407     }
1408
1409
1410     // next determine where it is relatively to our point: EM_CHARFROMPOS
1411     // always returns the closest character but we need to be more precise, so
1412     // double check that we really are where it pretends
1413     POINTL ptReal;
1414
1415 #if wxUSE_RICHEDIT
1416     // FIXME: we need to distinguish between richedit 2 and 3 here somehow but
1417     //        we don't know how to do it
1418     if ( IsRich() )
1419     {
1420         ::SendMessage(GetHwnd(), EM_POSFROMCHAR, (WPARAM)&ptReal, pos);
1421     }
1422     else
1423 #endif // wxUSE_RICHEDIT
1424     {
1425         LRESULT lRc = ::SendMessage(GetHwnd(), EM_POSFROMCHAR, pos, 0);
1426
1427         if ( lRc == -1 )
1428         {
1429             // this is apparently returned when pos corresponds to the last
1430             // position
1431             ptReal.x =
1432             ptReal.y = 0;
1433         }
1434         else
1435         {
1436             ptReal.x = LOWORD(lRc);
1437             ptReal.y = HIWORD(lRc);
1438         }
1439     }
1440
1441     wxTextCtrlHitTestResult rc;
1442
1443     if ( pt.y > ptReal.y + GetCharHeight() )
1444         rc = wxTE_HT_BELOW;
1445     else if ( pt.x > ptReal.x + GetCharWidth() )
1446         rc = wxTE_HT_BEYOND;
1447     else
1448         rc = wxTE_HT_ON_TEXT;
1449
1450     if ( posOut )
1451         *posOut = pos;
1452
1453     return rc;
1454 }
1455
1456 // ----------------------------------------------------------------------------
1457 //
1458 // ----------------------------------------------------------------------------
1459
1460 void wxTextCtrl::ShowPosition(long pos)
1461 {
1462     HWND hWnd = GetHwnd();
1463
1464     // To scroll to a position, we pass the number of lines and characters
1465     // to scroll *by*. This means that we need to:
1466     // (1) Find the line position of the current line.
1467     // (2) Find the line position of pos.
1468     // (3) Scroll by (pos - current).
1469     // For now, ignore the horizontal scrolling.
1470
1471     // Is this where scrolling is relative to - the line containing the caret?
1472     // Or is the first visible line??? Try first visible line.
1473 //    int currentLineLineNo1 = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1474
1475     int currentLineLineNo = (int)::SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1476
1477     int specifiedLineLineNo = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1478
1479     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1480
1481     if (linesToScroll != 0)
1482       (void)::SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1483 }
1484
1485 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1486 {
1487     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1488 }
1489
1490 int wxTextCtrl::GetLineLength(long lineNo) const
1491 {
1492     long pos = XYToPosition(0, lineNo);
1493
1494     return GetLengthOfLineContainingPos(pos);
1495 }
1496
1497 wxString wxTextCtrl::GetLineText(long lineNo) const
1498 {
1499     size_t len = (size_t)GetLineLength(lineNo) + 1;
1500
1501     // there must be at least enough place for the length WORD in the
1502     // buffer
1503     len += sizeof(WORD);
1504
1505     wxString str;
1506     {
1507         wxStringBufferLength tmp(str, len);
1508         wxChar *buf = tmp;
1509
1510         *(WORD *)buf = (WORD)len;
1511         len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1512
1513 #if wxUSE_RICHEDIT
1514         if ( IsRich() )
1515         {
1516             // remove the '\r' returned by the rich edit control, the user code
1517             // should never see it
1518             if ( buf[len - 2] == _T('\r') && buf[len - 1] == _T('\n') )
1519             {
1520                 buf[len - 2] = _T('\n');
1521                 len--;
1522             }
1523         }
1524 #endif // wxUSE_RICHEDIT
1525
1526         // remove the '\n' at the end, if any (this is how this function is
1527         // supposed to work according to the docs)
1528         if ( buf[len - 1] == _T('\n') )
1529         {
1530             len--;
1531         }
1532
1533         buf[len] = 0;
1534         tmp.SetLength(len);
1535     }
1536
1537     return str;
1538 }
1539
1540 void wxTextCtrl::SetMaxLength(unsigned long len)
1541 {
1542 #if wxUSE_RICHEDIT
1543     if (IsRich())
1544         ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, (LPARAM) (DWORD) len);
1545     else
1546 #endif
1547     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1548 }
1549
1550 // ----------------------------------------------------------------------------
1551 // Undo/redo
1552 // ----------------------------------------------------------------------------
1553
1554 void wxTextCtrl::Undo()
1555 {
1556     if (CanUndo())
1557     {
1558         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1559     }
1560 }
1561
1562 void wxTextCtrl::Redo()
1563 {
1564     if (CanRedo())
1565     {
1566 #if wxUSE_RICHEDIT
1567         if (GetRichVersion() > 1)
1568             ::SendMessage(GetHwnd(), EM_REDO, 0, 0);
1569         else
1570 #endif
1571         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1572         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1573     }
1574 }
1575
1576 bool wxTextCtrl::CanUndo() const
1577 {
1578     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1579 }
1580
1581 bool wxTextCtrl::CanRedo() const
1582 {
1583 #if wxUSE_RICHEDIT
1584     if (GetRichVersion() > 1)
1585         return ::SendMessage(GetHwnd(), EM_CANREDO, 0, 0) != 0;
1586     else
1587 #endif
1588     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1589 }
1590
1591 // ----------------------------------------------------------------------------
1592 // caret handling (Windows only)
1593 // ----------------------------------------------------------------------------
1594
1595 bool wxTextCtrl::ShowNativeCaret(bool show)
1596 {
1597     if ( show != m_isNativeCaretShown )
1598     {
1599         if ( !(show ? ::ShowCaret(GetHwnd()) : ::HideCaret(GetHwnd())) )
1600         {
1601             // not an error, may simply indicate that it's not shown/hidden
1602             // yet (i.e. it had been hidden/showh 2 times before)
1603             return false;
1604         }
1605
1606         m_isNativeCaretShown = show;
1607     }
1608
1609     return true;
1610 }
1611
1612 // ----------------------------------------------------------------------------
1613 // implemenation details
1614 // ----------------------------------------------------------------------------
1615
1616 void wxTextCtrl::Command(wxCommandEvent & event)
1617 {
1618     SetValue(event.GetString());
1619     ProcessCommand (event);
1620 }
1621
1622 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1623 {
1624     // By default, load the first file into the text window.
1625     if (event.GetNumberOfFiles() > 0)
1626     {
1627         LoadFile(event.GetFiles()[0]);
1628     }
1629 }
1630
1631 // ----------------------------------------------------------------------------
1632 // kbd input processing
1633 // ----------------------------------------------------------------------------
1634
1635 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1636 {
1637     MSG *msg = (MSG *)pMsg;
1638
1639     // check for our special keys here: if we don't do it and the parent frame
1640     // uses them as accelerators, they wouldn't work at all, so we disable
1641     // usual preprocessing for them
1642     if ( msg->message == WM_KEYDOWN )
1643     {
1644         WORD vkey = (WORD) msg->wParam;
1645         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1646         {
1647             if ( vkey == VK_BACK )
1648                 return false;
1649         }
1650         else // no Alt
1651         {
1652             // we want to process some Ctrl-foo and Shift-bar but no key
1653             // combinations without either Ctrl or Shift nor with both of them
1654             // pressed
1655             const int ctrl = wxIsCtrlDown(),
1656                       shift = wxIsShiftDown();
1657             switch ( ctrl + shift )
1658             {
1659                 default:
1660                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1661                     // fall through
1662
1663                 case 0:
1664                 case 2:
1665                     break;
1666
1667                 case 1:
1668                     // either Ctrl or Shift pressed
1669                     if ( ctrl )
1670                     {
1671                         switch ( vkey )
1672                         {
1673                             case 'C':
1674                             case 'V':
1675                             case 'X':
1676                             case VK_INSERT:
1677                             case VK_DELETE:
1678                             case VK_HOME:
1679                             case VK_END:
1680                                 return false;
1681                         }
1682                     }
1683                     else // Shift is pressed
1684                     {
1685                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1686                             return false;
1687                     }
1688             }
1689         }
1690     }
1691
1692     return wxControl::MSWShouldPreProcessMessage(pMsg);
1693 }
1694
1695 void wxTextCtrl::OnChar(wxKeyEvent& event)
1696 {
1697     switch ( event.GetKeyCode() )
1698     {
1699         case WXK_RETURN:
1700             if ( !HasFlag(wxTE_MULTILINE) )
1701             {
1702                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1703                 InitCommandEvent(event);
1704                 event.SetString(GetValue());
1705                 if ( GetEventHandler()->ProcessEvent(event) )
1706                     return;
1707             }
1708             //else: multiline controls need Enter for themselves
1709
1710             break;
1711
1712         case WXK_TAB:
1713             // ok, so this is getting absolutely ridiculous but I don't see
1714             // any other way to fix this bug: when a multiline text control is
1715             // inside a wxFrame, we need to generate the navigation event as
1716             // otherwise nothing happens at all, but when the same control is
1717             // created inside a dialog, IsDialogMessage() *does* switch focus
1718             // all by itself and so if we do it here as well, it is advanced
1719             // twice and goes to the next control... to prevent this from
1720             // happening we're doing this ugly check, the logic being that if
1721             // we don't have focus then it had been already changed to the next
1722             // control
1723             //
1724             // the right thing to do would, of course, be to understand what
1725             // the hell is IsDialogMessage() doing but this is beyond my feeble
1726             // forces at the moment unfortunately
1727             if ( !(m_windowStyle & wxTE_PROCESS_TAB))
1728             {
1729                 if ( FindFocus() == this )
1730                 {
1731                     int flags = 0;
1732                     if (!event.ShiftDown())
1733                         flags |= wxNavigationKeyEvent::IsForward ;
1734                     if (event.ControlDown())
1735                         flags |= wxNavigationKeyEvent::WinChange ;
1736                     if (Navigate(flags))
1737                         return;
1738                 }
1739             }
1740             else
1741             {
1742                 // Insert tab since calling the default Windows handler
1743                 // doesn't seem to do it
1744                 WriteText(wxT("\t"));
1745             }
1746             break;
1747     }
1748
1749     // no, we didn't process it
1750     event.Skip();
1751 }
1752
1753 WXLRESULT wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1754 {
1755     WXLRESULT lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1756
1757     if ( nMsg == WM_GETDLGCODE )
1758     {
1759         // we always want the chars and the arrows: the arrows for navigation
1760         // and the chars because we want Ctrl-C to work even in a read only
1761         // control
1762         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1763
1764         if ( IsEditable() )
1765         {
1766             // we may have several different cases:
1767             // 1. normal case: both TAB and ENTER are used for dlg navigation
1768             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1769             //    next control in the dialog
1770             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1771             //    navigation
1772             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1773             //    to the next control
1774
1775             // the multiline edit control should always get <Return> for itself
1776             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1777                 lDlgCode |= DLGC_WANTMESSAGE;
1778
1779             if ( HasFlag(wxTE_PROCESS_TAB) )
1780                 lDlgCode |= DLGC_WANTTAB;
1781
1782             lRc |= lDlgCode;
1783         }
1784         else // !editable
1785         {
1786             // NB: use "=", not "|=" as the base class version returns the
1787             //     same flags is this state as usual (i.e. including
1788             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1789             //     native Win32 apps?) but for now live with it.
1790             lRc = lDlgCode;
1791         }
1792     }
1793
1794     return lRc;
1795 }
1796
1797 // ----------------------------------------------------------------------------
1798 // text control event processing
1799 // ----------------------------------------------------------------------------
1800
1801 bool wxTextCtrl::SendUpdateEvent()
1802 {
1803     switch ( m_updatesCount )
1804     {
1805         case 0:
1806             // remember that we've got an update
1807             m_updatesCount++;
1808             break;
1809
1810         case 1:
1811             // we had already sent one event since the last control modification
1812             return false;
1813
1814         default:
1815             wxFAIL_MSG( _T("unexpected wxTextCtrl::m_updatesCount value") );
1816             // fall through
1817
1818         case -1:
1819             // we hadn't updated the control ourselves, this event comes from
1820             // the user, don't need to ignore it nor update the count
1821             break;
1822     }
1823
1824     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1825     InitCommandEvent(event);
1826
1827     return ProcessCommand(event);
1828 }
1829
1830 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1831 {
1832     switch ( param )
1833     {
1834         case EN_SETFOCUS:
1835         case EN_KILLFOCUS:
1836             {
1837                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1838                                                          : wxEVT_SET_FOCUS,
1839                                    m_windowId);
1840                 event.SetEventObject(this);
1841                 GetEventHandler()->ProcessEvent(event);
1842             }
1843             break;
1844
1845         case EN_CHANGE:
1846             SendUpdateEvent();
1847             break;
1848
1849         case EN_MAXTEXT:
1850             // the text size limit has been hit -- try to increase it
1851             if ( !AdjustSpaceLimit() )
1852             {
1853                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1854                 InitCommandEvent(event);
1855                 event.SetString(GetValue());
1856                 ProcessCommand(event);
1857             }
1858             break;
1859
1860             // the other edit notification messages are not processed
1861         default:
1862             return false;
1863     }
1864
1865     // processed
1866     return true;
1867 }
1868
1869 WXHBRUSH wxTextCtrl::MSWControlColor(WXHDC hDC)
1870 {
1871     if ( !IsEnabled() && !HasFlag(wxTE_MULTILINE) )
1872         return MSWControlColorDisabled(hDC);
1873
1874     return wxTextCtrlBase::MSWControlColorSolid(hDC);
1875 }
1876
1877 bool wxTextCtrl::AdjustSpaceLimit()
1878 {
1879     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1880
1881     // HACK: we try to automatically extend the limit for the amount of text
1882     //       to allow (interactively) entering more than 64Kb of text under
1883     //       Win9x but we shouldn't reset the text limit which was previously
1884     //       set explicitly with SetMaxLength()
1885     //
1886     //       we could solve this by storing the limit we set in wxTextCtrl but
1887     //       to save space we prefer to simply test here the actual limit
1888     //       value: we consider that SetMaxLength() can only be called for
1889     //       values < 32Kb
1890     if ( limit < 0x8000 )
1891     {
1892         // we've got more text than limit set by SetMaxLength()
1893         return false;
1894     }
1895
1896     unsigned int len = ::GetWindowTextLength(GetHwnd());
1897     if ( len >= limit )
1898     {
1899         limit = len + 0x8000;    // 32Kb
1900
1901 #if wxUSE_RICHEDIT
1902         if ( IsRich() )
1903         {
1904             // as a nice side effect, this also allows passing limit > 64Kb
1905             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1906         }
1907         else
1908 #endif // wxUSE_RICHEDIT
1909         {
1910             if ( limit > 0xffff )
1911             {
1912                 // this will set it to a platform-dependent maximum (much more
1913                 // than 64Kb under NT)
1914                 limit = 0;
1915             }
1916
1917             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1918         }
1919     }
1920
1921     // we changed the limit
1922     return true;
1923 }
1924
1925 bool wxTextCtrl::AcceptsFocus() const
1926 {
1927     // we don't want focus if we can't be edited unless we're a multiline
1928     // control because then it might be still nice to get focus from keyboard
1929     // to be able to scroll it without mouse
1930     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1931 }
1932
1933 wxSize wxTextCtrl::DoGetBestSize() const
1934 {
1935     int cx, cy;
1936     wxGetCharSize(GetHWND(), &cx, &cy, GetFont());
1937
1938     int wText = DEFAULT_ITEM_WIDTH;
1939
1940     int hText = cy;
1941     if ( m_windowStyle & wxTE_MULTILINE )
1942     {
1943         hText *= wxMax(GetNumberOfLines(), 5);
1944     }
1945     //else: for single line control everything is ok
1946
1947     // we have to add the adjustments for the control height only once, not
1948     // once per line, so do it after multiplication above
1949     hText += EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy) - cy;
1950
1951     return wxSize(wText, hText);
1952 }
1953
1954 // ----------------------------------------------------------------------------
1955 // standard handlers for standard edit menu events
1956 // ----------------------------------------------------------------------------
1957
1958 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1959 {
1960     Cut();
1961 }
1962
1963 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1964 {
1965     Copy();
1966 }
1967
1968 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1969 {
1970     Paste();
1971 }
1972
1973 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1974 {
1975     Undo();
1976 }
1977
1978 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1979 {
1980     Redo();
1981 }
1982
1983 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
1984 {
1985     long from, to;
1986     GetSelection(& from, & to);
1987     if (from != -1 && to != -1)
1988         Remove(from, to);
1989 }
1990
1991 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1992 {
1993     SetSelection(-1, -1);
1994 }
1995
1996 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1997 {
1998     event.Enable( CanCut() );
1999 }
2000
2001 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2002 {
2003     event.Enable( CanCopy() );
2004 }
2005
2006 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2007 {
2008     event.Enable( CanPaste() );
2009 }
2010
2011 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2012 {
2013     event.Enable( CanUndo() );
2014 }
2015
2016 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2017 {
2018     event.Enable( CanRedo() );
2019 }
2020
2021 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
2022 {
2023     long from, to;
2024     GetSelection(& from, & to);
2025     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
2026 }
2027
2028 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2029 {
2030     event.Enable(GetLastPosition() > 0);
2031 }
2032
2033 void wxTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2034 {
2035 #if wxUSE_RICHEDIT
2036     if (IsRich())
2037     {
2038         if (!m_privateContextMenu)
2039         {
2040             m_privateContextMenu = new wxMenu;
2041             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
2042             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
2043             m_privateContextMenu->AppendSeparator();
2044             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
2045             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
2046             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
2047             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
2048             m_privateContextMenu->AppendSeparator();
2049             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
2050         }
2051         PopupMenu(m_privateContextMenu);
2052         return;
2053     }
2054     else
2055 #endif
2056     event.Skip();
2057 }
2058
2059 void wxTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
2060 {
2061     // be sure the caret remains invisible if the user had hidden it
2062     if ( !m_isNativeCaretShown )
2063     {
2064         ::HideCaret(GetHwnd());
2065     }
2066 }
2067
2068 // ----------------------------------------------------------------------------
2069 // Default colors for MSW text control
2070 //
2071 // Set default background color to the native white instead of
2072 // the default wxSYS_COLOUR_BTNFACE (is triggered with wxNullColour).
2073 // ----------------------------------------------------------------------------
2074
2075 wxVisualAttributes wxTextCtrl::GetDefaultAttributes() const
2076 {
2077     wxVisualAttributes attrs;
2078     attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
2079     attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
2080     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW); //white
2081
2082     return attrs;
2083 }
2084
2085 // the rest of the file only deals with the rich edit controls
2086 #if wxUSE_RICHEDIT
2087
2088 // ----------------------------------------------------------------------------
2089 // EN_LINK processing
2090 // ----------------------------------------------------------------------------
2091
2092 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
2093 {
2094     NMHDR *hdr = (NMHDR* )lParam;
2095     switch ( hdr->code )
2096     {
2097        case EN_MSGFILTER:
2098             {
2099                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
2100                 UINT msg = msgf->msg;
2101
2102                 // this is a bit crazy but richedit 1.0 sends us all mouse
2103                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
2104                 // generate the wxWin events for this message manually
2105                 //
2106                 // NB: in fact, this is still not totally correct as it does
2107                 //     send us WM_LBUTTONUP if the selection was cleared by the
2108                 //     last click -- so currently we get 2 events in this case,
2109                 //     but as I don't see any obvious way to check for this I
2110                 //     leave this code in place because it's still better than
2111                 //     not getting left up events at all
2112                 if ( msg == WM_LBUTTONUP )
2113                 {
2114                     WXUINT flags = msgf->wParam;
2115                     int x = GET_X_LPARAM(msgf->lParam),
2116                         y = GET_Y_LPARAM(msgf->lParam);
2117
2118                     HandleMouseEvent(msg, x, y, flags);
2119                 }
2120             }
2121
2122             // return true to process the event (and false to ignore it)
2123             return true;
2124
2125         case EN_LINK:
2126             {
2127                 const ENLINK *enlink = (ENLINK *)hdr;
2128
2129                 switch ( enlink->msg )
2130                 {
2131                     case WM_SETCURSOR:
2132                         // ok, so it is hardcoded - do we really nee to
2133                         // customize it?
2134                         {
2135                             wxCursor cur(wxCURSOR_HAND);
2136                             ::SetCursor(GetHcursorOf(cur));
2137                             *result = TRUE;
2138                             break;
2139                         }
2140
2141                     case WM_MOUSEMOVE:
2142                     case WM_LBUTTONDOWN:
2143                     case WM_LBUTTONUP:
2144                     case WM_LBUTTONDBLCLK:
2145                     case WM_RBUTTONDOWN:
2146                     case WM_RBUTTONUP:
2147                     case WM_RBUTTONDBLCLK:
2148                         // send a mouse event
2149                         {
2150                             static const wxEventType eventsMouse[] =
2151                             {
2152                                 wxEVT_MOTION,
2153                                 wxEVT_LEFT_DOWN,
2154                                 wxEVT_LEFT_UP,
2155                                 wxEVT_LEFT_DCLICK,
2156                                 wxEVT_RIGHT_DOWN,
2157                                 wxEVT_RIGHT_UP,
2158                                 wxEVT_RIGHT_DCLICK,
2159                             };
2160
2161                             // the event ids are consecutive
2162                             wxMouseEvent
2163                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
2164
2165                             InitMouseEvent(evtMouse,
2166                                            GET_X_LPARAM(enlink->lParam),
2167                                            GET_Y_LPARAM(enlink->lParam),
2168                                            enlink->wParam);
2169
2170                             wxTextUrlEvent event(m_windowId, evtMouse,
2171                                                  enlink->chrg.cpMin,
2172                                                  enlink->chrg.cpMax);
2173
2174                             InitCommandEvent(event);
2175
2176                             *result = ProcessCommand(event);
2177                         }
2178                         break;
2179                 }
2180             }
2181             return true;
2182     }
2183
2184     // not processed, leave it to the base class
2185     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
2186 }
2187
2188 // ----------------------------------------------------------------------------
2189 // colour setting for the rich edit controls
2190 // ----------------------------------------------------------------------------
2191
2192 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
2193 {
2194     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
2195     {
2196         // colour didn't really change
2197         return false;
2198     }
2199
2200     if ( IsRich() )
2201     {
2202         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
2203         // EM_SETBKGNDCOLOR additionally
2204         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
2205     }
2206
2207     return true;
2208 }
2209
2210 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
2211 {
2212     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
2213     {
2214         // colour didn't really change
2215         return false;
2216     }
2217
2218     if ( IsRich() )
2219     {
2220         // change the colour of everything
2221         CHARFORMAT cf;
2222         wxZeroMemory(cf);
2223         cf.cbSize = sizeof(cf);
2224         cf.dwMask = CFM_COLOR;
2225         cf.crTextColor = wxColourToRGB(colour);
2226         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
2227     }
2228
2229     return true;
2230 }
2231
2232 // ----------------------------------------------------------------------------
2233 // styling support for rich edit controls
2234 // ----------------------------------------------------------------------------
2235
2236 #if wxUSE_RICHEDIT
2237
2238 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2239 {
2240     if ( !IsRich() )
2241     {
2242         // can't do it with normal text control
2243         return false;
2244     }
2245
2246     // the richedit 1.0 doesn't handle setting background colour, so don't
2247     // even try to do anything if it's the only thing we want to change
2248     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
2249         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
2250         !style.HasTabs() )
2251     {
2252         // nothing to do: return true if there was really nothing to do and
2253         // false if we failed to set bg colour
2254         return !style.HasBackgroundColour();
2255     }
2256
2257     // order the range if needed
2258     if ( start > end )
2259     {
2260         long tmp = start;
2261         start = end;
2262         end = tmp;
2263     }
2264
2265     // we can only change the format of the selection, so select the range we
2266     // want and restore the old selection later
2267     long startOld, endOld;
2268     GetSelection(&startOld, &endOld);
2269
2270     // but do we really have to change the selection?
2271     bool changeSel = start != startOld || end != endOld;
2272
2273     if ( changeSel )
2274     {
2275         DoSetSelection(start, end, false /* don't scroll caret into view */);
2276     }
2277
2278     // initialize CHARFORMAT struct
2279 #if wxUSE_RICHEDIT2
2280     CHARFORMAT2 cf;
2281 #else
2282     CHARFORMAT cf;
2283 #endif
2284
2285     wxZeroMemory(cf);
2286
2287     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2288     // CHARFORMAT in that case
2289 #if wxUSE_RICHEDIT2
2290     if ( m_verRichEdit == 1 )
2291     {
2292         // this is the only thing the control is going to grok
2293         cf.cbSize = sizeof(CHARFORMAT);
2294     }
2295     else
2296 #endif
2297     {
2298         // CHARFORMAT or CHARFORMAT2
2299         cf.cbSize = sizeof(cf);
2300     }
2301
2302     if ( style.HasFont() )
2303     {
2304         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
2305         //     but using it doesn't seem to hurt neither so leaving it for now
2306
2307         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
2308                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
2309
2310         // fill in data from LOGFONT but recalculate lfHeight because we need
2311         // the real height in twips and not the negative number which
2312         // wxFillLogFont() returns (this is correct in general and works with
2313         // the Windows font mapper, but not here)
2314         LOGFONT lf;
2315         wxFillLogFont(&lf, &style.GetFont());
2316         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
2317         cf.bCharSet = lf.lfCharSet;
2318         cf.bPitchAndFamily = lf.lfPitchAndFamily;
2319         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
2320
2321         // also deal with underline/italic/bold attributes: note that we must
2322         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
2323         // style to allow clearing it
2324         if ( lf.lfItalic )
2325         {
2326             cf.dwEffects |= CFE_ITALIC;
2327         }
2328
2329         if ( lf.lfWeight == FW_BOLD )
2330         {
2331             cf.dwEffects |= CFE_BOLD;
2332         }
2333
2334         if ( lf.lfUnderline )
2335         {
2336             cf.dwEffects |= CFE_UNDERLINE;
2337         }
2338
2339         // strikeout fonts are not supported by wxWidgets
2340     }
2341
2342     if ( style.HasTextColour() )
2343     {
2344         cf.dwMask |= CFM_COLOR;
2345         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2346     }
2347
2348 #if wxUSE_RICHEDIT2
2349     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2350     {
2351         cf.dwMask |= CFM_BACKCOLOR;
2352         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2353     }
2354 #endif // wxUSE_RICHEDIT2
2355
2356     // do format the selection
2357     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
2358                             SCF_SELECTION, (LPARAM)&cf) != 0;
2359     if ( !ok )
2360     {
2361         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
2362     }
2363
2364     // now do the paragraph formatting
2365     PARAFORMAT2 pf;
2366     wxZeroMemory(pf);
2367     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2368     // PARAFORMAT in that case
2369 #if wxUSE_RICHEDIT2
2370     if ( m_verRichEdit == 1 )
2371     {
2372         // this is the only thing the control is going to grok
2373         pf.cbSize = sizeof(PARAFORMAT);
2374     }
2375     else
2376 #endif
2377     {
2378         // PARAFORMAT or PARAFORMAT2
2379         pf.cbSize = sizeof(pf);
2380     }
2381
2382     if (style.HasAlignment())
2383     {
2384         pf.dwMask |= PFM_ALIGNMENT;
2385         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2386             pf.wAlignment = PFA_RIGHT;
2387         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2388             pf.wAlignment = PFA_CENTER;
2389         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2390             pf.wAlignment = PFA_JUSTIFY;
2391         else
2392             pf.wAlignment = PFA_LEFT;
2393     }
2394
2395     if (style.HasLeftIndent())
2396     {
2397         pf.dwMask |= PFM_STARTINDENT | PFM_OFFSET;
2398
2399         // Convert from 1/10 mm to TWIPS
2400         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2401         pf.dxOffset = (int) (((double) style.GetLeftSubIndent()) * mm2twips / 10.0) ;
2402     }
2403
2404     if (style.HasRightIndent())
2405     {
2406         pf.dwMask |= PFM_RIGHTINDENT;
2407
2408         // Convert from 1/10 mm to TWIPS
2409         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2410     }
2411
2412     if (style.HasTabs())
2413     {
2414         pf.dwMask |= PFM_TABSTOPS;
2415
2416         const wxArrayInt& tabs = style.GetTabs();
2417
2418         pf.cTabCount = (SHORT)wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2419         size_t i;
2420         for (i = 0; i < (size_t) pf.cTabCount; i++)
2421         {
2422             // Convert from 1/10 mm to TWIPS
2423             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2424         }
2425     }
2426
2427     if (pf.dwMask != 0)
2428     {
2429         // do format the selection
2430         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2431             0, (LPARAM) &pf) != 0;
2432         if ( !ok )
2433         {
2434             wxLogDebug(_T("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2435         }
2436     }
2437
2438     if ( changeSel )
2439     {
2440         // restore the original selection
2441         DoSetSelection(startOld, endOld, false);
2442     }
2443
2444     return ok;
2445 }
2446
2447 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2448 {
2449     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2450         return false;
2451
2452     if ( IsEditable() )
2453     {
2454         // we have to do this or the style wouldn't apply for the text typed by
2455         // the user
2456         wxTextPos posLast = GetLastPosition();
2457         SetStyle(posLast, posLast, m_defaultStyle);
2458     }
2459
2460     return true;
2461 }
2462
2463 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2464 {
2465     if ( !IsRich() )
2466     {
2467         // can't do it with normal text control
2468         return false;
2469     }
2470
2471     // initialize CHARFORMAT struct
2472 #if wxUSE_RICHEDIT2
2473     CHARFORMAT2 cf;
2474 #else
2475     CHARFORMAT cf;
2476 #endif
2477
2478     wxZeroMemory(cf);
2479
2480     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2481     // CHARFORMAT in that case
2482 #if wxUSE_RICHEDIT2
2483     if ( m_verRichEdit == 1 )
2484     {
2485         // this is the only thing the control is going to grok
2486         cf.cbSize = sizeof(CHARFORMAT);
2487     }
2488     else
2489 #endif
2490     {
2491         // CHARFORMAT or CHARFORMAT2
2492         cf.cbSize = sizeof(cf);
2493     }
2494     // we can only change the format of the selection, so select the range we
2495     // want and restore the old selection later
2496     long startOld, endOld;
2497     GetSelection(&startOld, &endOld);
2498
2499     // but do we really have to change the selection?
2500     bool changeSel = position != startOld || position != endOld;
2501
2502     if ( changeSel )
2503     {
2504         DoSetSelection(position, position, false /* don't scroll caret into view */);
2505     }
2506
2507     // get the selection formatting
2508     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2509                             SCF_SELECTION, (LPARAM)&cf) ;
2510
2511
2512     LOGFONT lf;
2513     lf.lfHeight = cf.yHeight;
2514     lf.lfWidth = 0;
2515     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2516     lf.lfClipPrecision = 0;
2517     lf.lfEscapement = 0;
2518     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2519
2520     //NOTE:  we _MUST_ set each of these values to _something_ since we
2521     //do not call wxZeroMemory on the LOGFONT lf
2522     if (cf.dwEffects & CFE_ITALIC)
2523         lf.lfItalic = TRUE;
2524     else
2525         lf.lfItalic = FALSE;
2526
2527     lf.lfOrientation = 0;
2528     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2529     lf.lfQuality = 0;
2530
2531     if (cf.dwEffects & CFE_STRIKEOUT)
2532         lf.lfStrikeOut = TRUE;
2533     else
2534         lf.lfStrikeOut = FALSE;
2535
2536     if (cf.dwEffects & CFE_UNDERLINE)
2537         lf.lfUnderline = TRUE;
2538     else
2539         lf.lfUnderline = FALSE;
2540
2541     if (cf.dwEffects & CFE_BOLD)
2542         lf.lfWeight = FW_BOLD;
2543     else
2544         lf.lfWeight = FW_NORMAL;
2545
2546     wxFont font = wxCreateFontFromLogFont(& lf);
2547     if (font.Ok())
2548     {
2549         style.SetFont(font);
2550     }
2551     style.SetTextColour(wxColour(cf.crTextColor));
2552
2553 #if wxUSE_RICHEDIT2
2554     if ( m_verRichEdit != 1 )
2555     {
2556         // cf.dwMask |= CFM_BACKCOLOR;
2557         style.SetBackgroundColour(wxColour(cf.crBackColor));
2558     }
2559 #endif // wxUSE_RICHEDIT2
2560
2561     // now get the paragraph formatting
2562     PARAFORMAT2 pf;
2563     wxZeroMemory(pf);
2564     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2565     // PARAFORMAT in that case
2566 #if wxUSE_RICHEDIT2
2567     if ( m_verRichEdit == 1 )
2568     {
2569         // this is the only thing the control is going to grok
2570         pf.cbSize = sizeof(PARAFORMAT);
2571     }
2572     else
2573 #endif
2574     {
2575         // PARAFORMAT or PARAFORMAT2
2576         pf.cbSize = sizeof(pf);
2577     }
2578
2579     // do format the selection
2580     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2581
2582     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0), (int) ((double) pf.dxOffset * twips2mm * 10.0) );
2583     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2584
2585     if (pf.wAlignment == PFA_CENTER)
2586         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2587     else if (pf.wAlignment == PFA_RIGHT)
2588         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2589     else if (pf.wAlignment == PFA_JUSTIFY)
2590         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2591     else
2592         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2593
2594     wxArrayInt tabStops;
2595     size_t i;
2596     for (i = 0; i < (size_t) pf.cTabCount; i++)
2597     {
2598         tabStops.Add( (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) );
2599     }
2600
2601     if ( changeSel )
2602     {
2603         // restore the original selection
2604         DoSetSelection(startOld, endOld, false);
2605     }
2606
2607     return true;
2608 }
2609
2610 #endif
2611
2612 // ----------------------------------------------------------------------------
2613 // wxRichEditModule
2614 // ----------------------------------------------------------------------------
2615
2616 bool wxRichEditModule::OnInit()
2617 {
2618     // don't do anything - we will load it when needed
2619     return true;
2620 }
2621
2622 void wxRichEditModule::OnExit()
2623 {
2624     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2625     {
2626         if ( ms_hRichEdit[i] )
2627         {
2628             ::FreeLibrary(ms_hRichEdit[i]);
2629             ms_hRichEdit[i] = NULL;
2630         }
2631     }
2632 }
2633
2634 /* static */
2635 bool wxRichEditModule::Load(int version)
2636 {
2637     // we don't support loading richedit 3.0 as I don't know how to distinguish
2638     // it from 2.0 anyhow
2639     wxCHECK_MSG( version == 1 || version == 2, false,
2640                  _T("incorrect richedit control version requested") );
2641
2642     // make it the index in the array
2643     version--;
2644
2645     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2646     {
2647         // we had already tried to load it and failed
2648         return false;
2649     }
2650
2651     if ( ms_hRichEdit[version] )
2652     {
2653         // we've already got this one
2654         return true;
2655     }
2656
2657     wxString dllname = version ? _T("riched20") : _T("riched32");
2658     dllname += _T(".dll");
2659
2660     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2661
2662     if ( !ms_hRichEdit[version] )
2663     {
2664         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2665
2666         ms_hRichEdit[version] = (HINSTANCE)-1;
2667
2668         return false;
2669     }
2670
2671     return true;
2672 }
2673
2674 #endif // wxUSE_RICHEDIT
2675
2676 #endif // wxUSE_TEXTCTRL && !(__SMARTPHONE__ && __WXWINCE__)