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
  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 #include "wx/msw/winundef.h"
  56
  57 #include <string.h>
  58 #include <stdlib.h>
  59
  60 #ifndef __WXWINCE__
  61 #include <sys/types.h>
  62 #endif
  63
  64 #if wxUSE_RICHEDIT
  65
  66 // old mingw32 has richedit stuff directly in windows.h and doesn't have
  67 // richedit.h at all
  68 #if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__)
  69     #include <richedit.h>
  70 #endif
  71
  72 #include "wx/msw/missing.h"
  73
  74 #endif // wxUSE_RICHEDIT
  75
  76 // ----------------------------------------------------------------------------
  77 // private classes
  78 // ----------------------------------------------------------------------------
  79
  80 #if wxUSE_RICHEDIT
  81
  82 // this module initializes RichEdit DLL(s) if needed
  83 class wxRichEditModule : public wxModule
  84 {
  85 public:
  86     virtual bool OnInit();
  87     virtual void OnExit();
  88
  89     // load the richedit DLL of at least of required version
  90     static bool Load(int version = 1);
  91
  92 private:
  93     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
  94     static HINSTANCE ms_hRichEdit[2];
  95
  96     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
  97 };
  98
  99 HINSTANCE wxRichEditModule::ms_hRichEdit[2] = { NULL, NULL };
 100
 101 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 102
 103 #endif // wxUSE_RICHEDIT
 104
 105 // ----------------------------------------------------------------------------
 106 // event tables and other macros
 107 // ----------------------------------------------------------------------------
 108
 109 #if wxUSE_EXTENDED_RTTI
 110 WX_DEFINE_FLAGS( wxTextCtrlStyle )
 111
 112 wxBEGIN_FLAGS( wxTextCtrlStyle )
 113     // new style border flags, we put them first to
 114     // use them for streaming out
 115     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
 116     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
 117     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
 118     wxFLAGS_MEMBER(wxBORDER_RAISED)
 119     wxFLAGS_MEMBER(wxBORDER_STATIC)
 120     wxFLAGS_MEMBER(wxBORDER_NONE)
 121
 122     // old style border flags
 123     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
 124     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
 125     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
 126     wxFLAGS_MEMBER(wxRAISED_BORDER)
 127     wxFLAGS_MEMBER(wxSTATIC_BORDER)
 128     wxFLAGS_MEMBER(wxBORDER)
 129
 130     // standard window styles
 131     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
 132     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
 133     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
 134     wxFLAGS_MEMBER(wxWANTS_CHARS)
 135     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
 136     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
 137     wxFLAGS_MEMBER(wxVSCROLL)
 138     wxFLAGS_MEMBER(wxHSCROLL)
 139
 140     wxFLAGS_MEMBER(wxTE_PROCESS_ENTER)
 141     wxFLAGS_MEMBER(wxTE_PROCESS_TAB)
 142     wxFLAGS_MEMBER(wxTE_MULTILINE)
 143     wxFLAGS_MEMBER(wxTE_PASSWORD)
 144     wxFLAGS_MEMBER(wxTE_READONLY)
 145     wxFLAGS_MEMBER(wxHSCROLL)
 146     wxFLAGS_MEMBER(wxTE_RICH)
 147     wxFLAGS_MEMBER(wxTE_RICH2)
 148     wxFLAGS_MEMBER(wxTE_AUTO_URL)
 149     wxFLAGS_MEMBER(wxTE_NOHIDESEL)
 150     wxFLAGS_MEMBER(wxTE_LEFT)
 151     wxFLAGS_MEMBER(wxTE_CENTRE)
 152     wxFLAGS_MEMBER(wxTE_RIGHT)
 153     wxFLAGS_MEMBER(wxTE_DONTWRAP)
 154     wxFLAGS_MEMBER(wxTE_LINEWRAP)
 155     wxFLAGS_MEMBER(wxTE_WORDWRAP)
 156
 157 wxEND_FLAGS( wxTextCtrlStyle )
 158
 159 IMPLEMENT_DYNAMIC_CLASS_XTI(wxTextCtrl, wxControl,"wx/textctrl.h")
 160
 161 wxBEGIN_PROPERTIES_TABLE(wxTextCtrl)
 162     wxEVENT_PROPERTY( TextUpdated , wxEVT_COMMAND_TEXT_UPDATED , wxCommandEvent )
 163     wxEVENT_PROPERTY( TextEnter , wxEVT_COMMAND_TEXT_ENTER , wxCommandEvent )
 164
 165     wxPROPERTY( Font , wxFont , SetFont , GetFont  , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 166         wxPROPERTY( Value , wxString , SetValue, GetValue, wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 167     wxPROPERTY_FLAGS( WindowStyle , wxTextCtrlStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 168 wxEND_PROPERTIES_TABLE()
 169
 170 wxBEGIN_HANDLERS_TABLE(wxTextCtrl)
 171 wxEND_HANDLERS_TABLE()
 172
 173 wxCONSTRUCTOR_6( wxTextCtrl , wxWindow* , Parent , wxWindowID , Id , wxString , Value , wxPoint , Position , wxSize , Size , long , WindowStyle)
 174 #else
 175 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 176 #endif
 177
 178
 179 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 180     EVT_CHAR(wxTextCtrl::OnChar)
 181     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 182
 183 #if wxUSE_RICHEDIT
 184     EVT_RIGHT_UP(wxTextCtrl::OnRightClick)
 185 #endif
 186
 187     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 188     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 189     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 190     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 191     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 192     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 193     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 194
 195     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 196     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 197     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 198     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 199     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 200     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 201     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 202
 203     EVT_SET_FOCUS(wxTextCtrl::OnSetFocus)
 204 END_EVENT_TABLE()
 205
 206 // ============================================================================
 207 // implementation
 208 // ============================================================================
 209
 210 // ----------------------------------------------------------------------------
 211 // creation
 212 // ----------------------------------------------------------------------------
 213
 214 void wxTextCtrl::Init()
 215 {
 216 #if wxUSE_RICHEDIT
 217     m_verRichEdit = 0;
 218 #endif // wxUSE_RICHEDIT
 219
 220     m_privateContextMenu = NULL;
 221     m_suppressNextUpdate = FALSE;
 222     m_isNativeCaretShown = true;
 223 }
 224
 225 wxTextCtrl::~wxTextCtrl()
 226 {
 227     if (m_privateContextMenu)
 228     {
 229         delete m_privateContextMenu;
 230         m_privateContextMenu = NULL;
 231     }
 232 }
 233
 234 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 235                         const wxString& value,
 236                         const wxPoint& pos,
 237                         const wxSize& size,
 238                         long style,
 239                         const wxValidator& validator,
 240                         const wxString& name)
 241 {
 242 #ifdef __WXWINCE__
 243     if ((style & wxBORDER_MASK) == 0)
 244         style |= wxBORDER_SIMPLE;
 245 #endif
 246
 247     // base initialization
 248     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 249         return FALSE;
 250
 251     if ( parent )
 252         parent->AddChild(this);
 253
 254     // translate wxWin style flags to MSW ones
 255     WXDWORD msStyle = MSWGetCreateWindowFlags();
 256
 257     // do create the control - either an EDIT or RICHEDIT
 258     wxString windowClass = wxT("EDIT");
 259
 260 #if wxUSE_RICHEDIT
 261     if ( m_windowStyle & wxTE_AUTO_URL )
 262     {
 263         // automatic URL detection only works in RichEdit 2.0+
 264         m_windowStyle |= wxTE_RICH2;
 265     }
 266
 267     if ( m_windowStyle & wxTE_RICH2 )
 268     {
 269         // using richedit 2.0 implies using wxTE_RICH
 270         m_windowStyle |= wxTE_RICH;
 271     }
 272
 273     // we need to load the richedit DLL before creating the rich edit control
 274     if ( m_windowStyle & wxTE_RICH )
 275     {
 276         static bool s_errorGiven = FALSE;// MT-FIXME
 277
 278         // Which version do we need? Use 1.0 by default because it is much more
 279         // like the the standard EDIT or 2.0 if explicitly requested, but use
 280         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 281         //
 282         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 283         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 284         //       should use 3.0 if available as it is the best of both worlds -
 285         //       but as I can't test it right now I don't do it (VZ)
 286 #if wxUSE_UNICODE
 287         const int verRichEdit = 2;
 288 #else // !wxUSE_UNICODE
 289         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 290 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 291
 292         // only give the error msg once if the DLL can't be loaded
 293         if ( !s_errorGiven )
 294         {
 295             // try to load the RichEdit DLL (will do nothing if already done)
 296             if ( !wxRichEditModule::Load(verRichEdit) )
 297             {
 298 #if !wxUSE_UNICODE
 299                 // try another version?
 300                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 301
 302                 if ( !wxRichEditModule::Load(verRichEdit) )
 303 #endif // wxUSE_UNICODE
 304                 {
 305                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 306
 307                     s_errorGiven = TRUE;
 308                 }
 309             }
 310         }
 311
 312         // have we managed to load any richedit version?
 313         if ( !s_errorGiven )
 314         {
 315             m_verRichEdit = verRichEdit;
 316             if ( m_verRichEdit == 1 )
 317             {
 318                 windowClass = wxT("RICHEDIT");
 319             }
 320             else
 321             {
 322 #ifndef RICHEDIT_CLASS
 323                 wxString RICHEDIT_CLASS;
 324                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 325 #if wxUSE_UNICODE
 326                 RICHEDIT_CLASS += _T('W');
 327 #else // ANSI
 328                 RICHEDIT_CLASS += _T('A');
 329 #endif // Unicode/ANSI
 330 #endif // !RICHEDIT_CLASS
 331
 332                 windowClass = RICHEDIT_CLASS;
 333             }
 334         }
 335     }
 336 #endif // wxUSE_RICHEDIT
 337
 338     // we need to turn '\n's into "\r\n"s for the multiline controls
 339     wxString valueWin;
 340     if ( m_windowStyle & wxTE_MULTILINE )
 341     {
 342         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 343     }
 344     else // single line
 345     {
 346         valueWin = value;
 347     }
 348
 349     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 350         return FALSE;
 351
 352     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 353
 354 #if wxUSE_RICHEDIT
 355     if ( IsRich() )
 356     {
 357         // enable the events we're interested in: we want to get EN_CHANGE as
 358         // for the normal controls
 359         LPARAM mask = ENM_CHANGE;
 360
 361         if ( GetRichVersion() == 1 )
 362         {
 363             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 364             // explained in its handler
 365            mask |= ENM_MOUSEEVENTS;
 366         }
 367         else if ( m_windowStyle & wxTE_AUTO_URL )
 368         {
 369             mask |= ENM_LINK;
 370
 371             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 372         }
 373
 374         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 375     }
 376 #endif // wxUSE_RICHEDIT
 377
 378     return TRUE;
 379 }
 380
 381 // Make sure the window style (etc.) reflects the HWND style (roughly)
 382 void wxTextCtrl::AdoptAttributesFromHWND()
 383 {
 384     wxWindow::AdoptAttributesFromHWND();
 385
 386     HWND hWnd = GetHwnd();
 387     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 388
 389     // retrieve the style to see whether this is an edit or richedit ctrl
 390 #if wxUSE_RICHEDIT
 391     wxString classname = wxGetWindowClass(GetHWND());
 392
 393     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 394     {
 395         m_verRichEdit = 0;
 396     }
 397     else // rich edit?
 398     {
 399         wxChar c;
 400         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 401         {
 402             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 403
 404             m_verRichEdit = 0;
 405         }
 406     }
 407 #endif // wxUSE_RICHEDIT
 408
 409     if (style & ES_MULTILINE)
 410         m_windowStyle |= wxTE_MULTILINE;
 411     if (style & ES_PASSWORD)
 412         m_windowStyle |= wxTE_PASSWORD;
 413     if (style & ES_READONLY)
 414         m_windowStyle |= wxTE_READONLY;
 415     if (style & ES_WANTRETURN)
 416         m_windowStyle |= wxTE_PROCESS_ENTER;
 417     if (style & ES_CENTER)
 418         m_windowStyle |= wxTE_CENTRE;
 419     if (style & ES_RIGHT)
 420         m_windowStyle |= wxTE_RIGHT;
 421 }
 422
 423 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 424 {
 425     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 426
 427     // styles which we alaways add by default
 428     if ( style & wxTE_MULTILINE )
 429     {
 430         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 431                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 432
 433         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 434         if ( !(style & wxTE_NO_VSCROLL) )
 435         {
 436             // always adjust the vertical scrollbar automatically if we have it
 437             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 438
 439 #if wxUSE_RICHEDIT
 440             // we have to use this style for the rich edit controls because
 441             // without it the vertical scrollbar never appears at all in
 442             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 443             if ( style & wxTE_RICH2 )
 444             {
 445                 msStyle |= ES_DISABLENOSCROLL;
 446             }
 447 #endif // wxUSE_RICHEDIT
 448         }
 449
 450         style |= wxTE_PROCESS_ENTER;
 451     }
 452     else // !multiline
 453     {
 454         // there is really no reason to not have this style for single line
 455         // text controls
 456         msStyle |= ES_AUTOHSCROLL;
 457     }
 458
 459     // note that wxTE_DONTWRAP is the same as wxHSCROLL so if we have a horz
 460     // scrollbar, there is no wrapping -- which makes sense
 461     if ( style & wxTE_DONTWRAP )
 462     {
 463         // automatically scroll the control horizontally as necessary
 464         //
 465         // NB: ES_AUTOHSCROLL is needed for richedit controls or they don't
 466         //     show horz scrollbar at all, even in spite of WS_HSCROLL, and as
 467         //     it doesn't seem to do any harm for plain edit controls, add it
 468         //     always
 469         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 470     }
 471
 472     if ( style & wxTE_READONLY )
 473         msStyle |= ES_READONLY;
 474
 475     if ( style & wxTE_PASSWORD )
 476         msStyle |= ES_PASSWORD;
 477
 478     if ( style & wxTE_NOHIDESEL )
 479         msStyle |= ES_NOHIDESEL;
 480
 481     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 482     if ( style & wxTE_CENTRE )
 483         msStyle |= ES_CENTER;
 484     else if ( style & wxTE_RIGHT )
 485         msStyle |= ES_RIGHT;
 486     else
 487         msStyle |= ES_LEFT; // ES_LEFT is 0 as well but for consistency...
 488
 489     return msStyle;
 490 }
 491
 492 void wxTextCtrl::SetWindowStyleFlag(long style)
 493 {
 494 #if wxUSE_RICHEDIT
 495     // we have to deal with some styles separately because they can't be
 496     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 497     // using richedit-specific EM_SETOPTIONS
 498     if ( IsRich() &&
 499             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 500     {
 501         bool set = (style & wxTE_NOHIDESEL) != 0;
 502
 503         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 504                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 505     }
 506 #endif // wxUSE_RICHEDIT
 507
 508     wxControl::SetWindowStyleFlag(style);
 509 }
 510
 511 // ----------------------------------------------------------------------------
 512 // set/get the controls text
 513 // ----------------------------------------------------------------------------
 514
 515 wxString wxTextCtrl::GetValue() const
 516 {
 517     // range 0..-1 is special for GetRange() and means to retrieve all text
 518     return GetRange(0, -1);
 519 }
 520
 521 wxString wxTextCtrl::GetRange(long from, long to) const
 522 {
 523     wxString str;
 524
 525     if ( from >= to && to != -1 )
 526     {
 527         // nothing to retrieve
 528         return str;
 529     }
 530
 531 #if wxUSE_RICHEDIT
 532     if ( IsRich() )
 533     {
 534         int len = GetWindowTextLength(GetHwnd());
 535         if ( len > from )
 536         {
 537             if ( to == -1 )
 538                 to = len;
 539
 540 #if !wxUSE_UNICODE
 541             // we must use EM_STREAMOUT if we don't want to lose all characters
 542             // not representable in the current character set (EM_GETTEXTRANGE
 543             // simply replaces them with question marks...)
 544             if ( GetRichVersion() > 1 )
 545             {
 546                 // we must have some encoding, otherwise any 8bit chars in the
 547                 // control are simply *lost* (replaced by '?')
 548                 wxFontEncoding encoding = wxFONTENCODING_SYSTEM;
 549
 550                 wxFont font = m_defaultStyle.GetFont();
 551                 if ( !font.Ok() )
 552                     font = GetFont();
 553
 554                 if ( font.Ok() )
 555                 {
 556                    encoding = font.GetEncoding();
 557                 }
 558
 559                 if ( encoding == wxFONTENCODING_SYSTEM )
 560                 {
 561                     encoding = wxLocale::GetSystemEncoding();
 562                 }
 563
 564                 if ( encoding == wxFONTENCODING_SYSTEM )
 565                 {
 566                     encoding = wxFONTENCODING_ISO8859_1;
 567                 }
 568
 569                 str = StreamOut(encoding);
 570
 571                 if ( !str.empty() )
 572                 {
 573                     // we have to manually extract the required part, luckily
 574                     // this is easy in this case as EOL characters in str are
 575                     // just LFs because we remove CRs in wxRichEditStreamOut
 576                     str = str.Mid(from, to - from);
 577                 }
 578             }
 579
 580             // StreamOut() wasn't used or failed, try to do it in normal way
 581             if ( str.empty() )
 582 #endif // !wxUSE_UNICODE
 583             {
 584                 // alloc one extra WORD as needed by the control
 585                 wxStringBuffer tmp(str, ++len);
 586                 wxChar *p = tmp;
 587
 588                 TEXTRANGE textRange;
 589                 textRange.chrg.cpMin = from;
 590                 textRange.chrg.cpMax = to;
 591                 textRange.lpstrText = p;
 592
 593                 (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE,
 594                                   0, (LPARAM)&textRange);
 595
 596                 if ( m_verRichEdit > 1 )
 597                 {
 598                     // RichEdit 2.0 uses just CR ('\r') for the
 599                     // newlines which is neither Unix nor Windows
 600                     // style - convert it to something reasonable
 601                     for ( ; *p; p++ )
 602                     {
 603                         if ( *p == _T('\r') )
 604                             *p = _T('\n');
 605                     }
 606                 }
 607             }
 608
 609             if ( m_verRichEdit == 1 )
 610             {
 611                 // convert to the canonical form - see comment below
 612                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 613             }
 614         }
 615         //else: no text at all, leave the string empty
 616     }
 617     else
 618 #endif // wxUSE_RICHEDIT
 619     {
 620         // retrieve all text
 621         str = wxGetWindowText(GetHWND());
 622
 623         // need only a range?
 624         if ( from < to )
 625         {
 626             str = str.Mid(from, to - from);
 627         }
 628
 629         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 630         // canonical one (same one as above) for consistency with the other kinds
 631         // of controls and, more importantly, with the other ports
 632         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 633     }
 634
 635     return str;
 636 }
 637
 638 void wxTextCtrl::SetValue(const wxString& value)
 639 {
 640     // if the text is long enough, it's faster to just set it instead of first
 641     // comparing it with the old one (chances are that it will be different
 642     // anyhow, this comparison is there to avoid flicker for small single-line
 643     // edit controls mostly)
 644     if ( (value.length() > 0x400) || (value != GetValue()) )
 645     {
 646         DoWriteText(value, FALSE /* not selection only */);
 647
 648         // for compatibility, don't move the cursor when doing SetValue()
 649         SetInsertionPoint(0);
 650     }
 651     else // same text
 652     {
 653         // still send an event for consistency
 654         SendUpdateEvent();
 655     }
 656
 657     // we should reset the modified flag even if the value didn't really change
 658
 659     // mark the control as being not dirty - we changed its text, not the
 660     // user
 661     DiscardEdits();
 662 }
 663
 664 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 665
 666 // TODO: using memcpy() would improve performance a lot for big amounts of text
 667
 668 DWORD CALLBACK
 669 wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 670 {
 671     *pcb = 0;
 672
 673     const wchar_t ** const ppws = (const wchar_t **)dwCookie;
 674
 675     wchar_t *wbuf = (wchar_t *)buf;
 676     const wchar_t *wpc = *ppws;
 677     while ( cb && *wpc )
 678     {
 679         *wbuf++ = *wpc++;
 680
 681         cb -= sizeof(wchar_t);
 682         (*pcb) += sizeof(wchar_t);
 683     }
 684
 685     *ppws = wpc;
 686
 687     return 0;
 688 }
 689
 690 // helper struct used to pass parameters from wxTextCtrl to wxRichEditStreamOut
 691 struct wxStreamOutData
 692 {
 693     wchar_t *wpc;
 694     size_t len;
 695 };
 696
 697 DWORD CALLBACK
 698 wxRichEditStreamOut(DWORD_PTR dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 699 {
 700     *pcb = 0;
 701
 702     wxStreamOutData *data = (wxStreamOutData *)dwCookie;
 703
 704     const wchar_t *wbuf = (const wchar_t *)buf;
 705     wchar_t *wpc = data->wpc;
 706     while ( cb )
 707     {
 708         wchar_t wch = *wbuf++;
 709
 710         // turn "\r\n" into "\n" on the fly
 711         if ( wch != L'\r' )
 712             *wpc++ = wch;
 713         else
 714             data->len--;
 715
 716         cb -= sizeof(wchar_t);
 717         (*pcb) += sizeof(wchar_t);
 718     }
 719
 720     data->wpc = wpc;
 721
 722     return 0;
 723 }
 724
 725
 726 #if wxUSE_UNICODE_MSLU
 727     #define UNUSED_IF_MSLU(param)
 728 #else
 729     #define UNUSED_IF_MSLU(param) param
 730 #endif
 731
 732 bool
 733 wxTextCtrl::StreamIn(const wxString& value,
 734                      wxFontEncoding UNUSED_IF_MSLU(encoding),
 735                      bool selectionOnly)
 736 {
 737 #if wxUSE_UNICODE_MSLU
 738     const wchar_t *wpc = value.c_str();
 739 #else // !wxUSE_UNICODE_MSLU
 740     wxCSConv conv(encoding);
 741
 742     const size_t len = conv.MB2WC(NULL, value, value.length());
 743
 744 #if wxUSE_WCHAR_T
 745     wxWCharBuffer wchBuf(len);
 746     wchar_t *wpc = wchBuf.data();
 747 #else
 748     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 749     wchar_t *wpc = wchBuf;
 750 #endif
 751
 752     conv.MB2WC(wpc, value, value.length());
 753 #endif // wxUSE_UNICODE_MSLU
 754
 755     // finally, stream it in the control
 756     EDITSTREAM eds;
 757     wxZeroMemory(eds);
 758     eds.dwCookie = (DWORD)&wpc;
 759     // the cast below is needed for broken (very) old mingw32 headers
 760     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 761
 762     // we're going to receive 2 EN_CHANGE notifications if we got any selection
 763     // (same problem as in DoWriteText())
 764     if ( selectionOnly && HasSelection() )
 765     {
 766         // so suppress one of them
 767         m_suppressNextUpdate = TRUE;
 768     }
 769
 770     ::SendMessage(GetHwnd(), EM_STREAMIN,
 771                   SF_TEXT |
 772                   SF_UNICODE |
 773                   (selectionOnly ? SFF_SELECTION : 0),
 774                   (LPARAM)&eds);
 775
 776     if ( eds.dwError )
 777     {
 778         wxLogLastError(_T("EM_STREAMIN"));
 779     }
 780
 781 #if !wxUSE_WCHAR_T
 782     free(wchBuf);
 783 #endif // !wxUSE_WCHAR_T
 784
 785     return TRUE;
 786 }
 787
 788 #if !wxUSE_UNICODE_MSLU
 789
 790 wxString
 791 wxTextCtrl::StreamOut(wxFontEncoding encoding, bool selectionOnly) const
 792 {
 793     wxString out;
 794
 795     const int len = GetWindowTextLength(GetHwnd());
 796
 797 #if wxUSE_WCHAR_T
 798     wxWCharBuffer wchBuf(len);
 799     wchar_t *wpc = wchBuf.data();
 800 #else
 801     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 802     wchar_t *wpc = wchBuf;
 803 #endif
 804
 805     wxStreamOutData data;
 806     data.wpc = wpc;
 807     data.len = len;
 808
 809     EDITSTREAM eds;
 810     wxZeroMemory(eds);
 811     eds.dwCookie = (DWORD)&data;
 812     eds.pfnCallback = wxRichEditStreamOut;
 813
 814     ::SendMessage
 815       (
 816         GetHwnd(),
 817         EM_STREAMOUT,
 818         SF_TEXT | SF_UNICODE | (selectionOnly ? SFF_SELECTION : 0),
 819         (LPARAM)&eds
 820       );
 821
 822     if ( eds.dwError )
 823     {
 824         wxLogLastError(_T("EM_STREAMOUT"));
 825     }
 826     else // streamed out ok
 827     {
 828         // NUL-terminate the string because its length could have been
 829         // decreased by wxRichEditStreamOut
 830         *(wchBuf.data() + data.len) = L'\0';
 831
 832         // now convert to the given encoding (this is a possibly lossful
 833         // conversion but what else can we do)
 834         wxCSConv conv(encoding);
 835         size_t lenNeeded = conv.WC2MB(NULL, wchBuf, 0);
 836         if ( lenNeeded++ )
 837         {
 838             conv.WC2MB(wxStringBuffer(out, lenNeeded), wchBuf, lenNeeded);
 839         }
 840     }
 841
 842 #if !wxUSE_WCHAR_T
 843     free(wchBuf);
 844 #endif // !wxUSE_WCHAR_T
 845
 846     return out;
 847 }
 848
 849 #endif // !wxUSE_UNICODE_MSLU
 850
 851 #endif // wxUSE_RICHEDIT
 852
 853 void wxTextCtrl::WriteText(const wxString& value)
 854 {
 855     DoWriteText(value);
 856 }
 857
 858 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 859 {
 860     wxString valueDos;
 861     if ( m_windowStyle & wxTE_MULTILINE )
 862         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 863     else
 864         valueDos = value;
 865
 866 #if wxUSE_RICHEDIT
 867     // there are several complications with the rich edit controls here
 868     bool done = FALSE;
 869     if ( IsRich() )
 870     {
 871         // first, ensure that the new text will be in the default style
 872         if ( !m_defaultStyle.IsDefault() )
 873         {
 874             long start, end;
 875             GetSelection(&start, &end);
 876             SetStyle(start, end, m_defaultStyle);
 877         }
 878
 879 #if wxUSE_UNICODE_MSLU
 880         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 881         // but EM_STREAMIN works
 882         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 883         {
 884            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 885         }
 886 #endif // wxUSE_UNICODE_MSLU
 887
 888 #if !wxUSE_UNICODE
 889         // next check if the text we're inserting must be shown in a non
 890         // default charset -- this only works for RichEdit > 1.0
 891         if ( GetRichVersion() > 1 )
 892         {
 893             wxFont font = m_defaultStyle.GetFont();
 894             if ( !font.Ok() )
 895                 font = GetFont();
 896
 897             if ( font.Ok() )
 898             {
 899                wxFontEncoding encoding = font.GetEncoding();
 900                if ( encoding != wxFONTENCODING_SYSTEM )
 901                {
 902                    // we have to use EM_STREAMIN to force richedit control 2.0+
 903                    // to show any text in the non default charset -- otherwise
 904                    // it thinks it knows better than we do and always shows it
 905                    // in the default one
 906                    done = StreamIn(valueDos, encoding, selectionOnly);
 907                }
 908             }
 909         }
 910 #endif // !wxUSE_UNICODE
 911     }
 912
 913     if ( !done )
 914 #endif // wxUSE_RICHEDIT
 915     {
 916         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
 917         // call below which is confusing for the client code and so should be
 918         // avoided
 919         //
 920         // these cases are: (a) plain EDIT controls if EM_REPLACESEL is used
 921         // and there is a non empty selection currently and (b) rich text
 922         // controls in any case
 923         if (
 924 #if wxUSE_RICHEDIT
 925             IsRich() ||
 926 #endif // wxUSE_RICHEDIT
 927             (selectionOnly && HasSelection()) )
 928         {
 929             m_suppressNextUpdate = TRUE;
 930         }
 931
 932         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 933                       0, (LPARAM)valueDos.c_str());
 934
 935         // OTOH, non rich text controls don't generate any events at all when
 936         // we use WM_SETTEXT -- have to emulate them here
 937         if ( !selectionOnly
 938 #if wxUSE_RICHEDIT
 939                 && !IsRich()
 940 #endif // wxUSE_RICHEDIT
 941            )
 942         {
 943             // Windows already sends an update event for single-line
 944             // controls.
 945             if ( m_windowStyle & wxTE_MULTILINE )
 946                 SendUpdateEvent();
 947         }
 948     }
 949
 950     AdjustSpaceLimit();
 951 }
 952
 953 void wxTextCtrl::AppendText(const wxString& text)
 954 {
 955     SetInsertionPointEnd();
 956
 957     WriteText(text);
 958
 959 #if wxUSE_RICHEDIT
 960     if ( IsMultiLine() && GetRichVersion() > 1 )
 961     {
 962         // setting the caret to the end and showing it simply doesn't work for
 963         // RichEdit 2.0 -- force it to still do what we want
 964         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
 965     }
 966 #endif // wxUSE_RICHEDIT
 967 }
 968
 969 void wxTextCtrl::Clear()
 970 {
 971     ::SetWindowText(GetHwnd(), wxEmptyString);
 972
 973 #if wxUSE_RICHEDIT
 974     if ( !IsRich() )
 975 #endif // wxUSE_RICHEDIT
 976     {
 977         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 978         // but the normal ones don't -- make Clear() behaviour consistent by
 979         // always sending this event
 980
 981         // Windows already sends an update event for single-line
 982         // controls.
 983         if ( m_windowStyle & wxTE_MULTILINE )
 984             SendUpdateEvent();
 985     }
 986 }
 987
 988 #ifdef __WIN32__
 989
 990 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 991 {
 992     SetFocus();
 993
 994     size_t lenOld = GetValue().length();
 995
 996     wxUint32 code = event.GetRawKeyCode();
 997     ::keybd_event(code, 0, 0 /* key press */, 0);
 998     ::keybd_event(code, 0, KEYEVENTF_KEYUP, 0);
 999
1000     // assume that any alphanumeric key changes the total number of characters
1001     // in the control - this should work in 99% of cases
1002     return GetValue().length() != lenOld;
1003 }
1004
1005 #endif // __WIN32__
1006
1007 // ----------------------------------------------------------------------------
1008 // Clipboard operations
1009 // ----------------------------------------------------------------------------
1010
1011 void wxTextCtrl::Copy()
1012 {
1013     if (CanCopy())
1014     {
1015         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
1016     }
1017 }
1018
1019 void wxTextCtrl::Cut()
1020 {
1021     if (CanCut())
1022     {
1023         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
1024     }
1025 }
1026
1027 void wxTextCtrl::Paste()
1028 {
1029     if (CanPaste())
1030     {
1031         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
1032     }
1033 }
1034
1035 bool wxTextCtrl::HasSelection() const
1036 {
1037     long from, to;
1038     GetSelection(&from, &to);
1039     return from != to;
1040 }
1041
1042 bool wxTextCtrl::CanCopy() const
1043 {
1044     // Can copy if there's a selection
1045     return HasSelection();
1046 }
1047
1048 bool wxTextCtrl::CanCut() const
1049 {
1050     return CanCopy() && IsEditable();
1051 }
1052
1053 bool wxTextCtrl::CanPaste() const
1054 {
1055     if ( !IsEditable() )
1056         return FALSE;
1057
1058 #if wxUSE_RICHEDIT
1059     if ( IsRich() )
1060     {
1061         UINT cf = 0; // 0 == any format
1062
1063         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
1064     }
1065 #endif // wxUSE_RICHEDIT
1066
1067     // Standard edit control: check for straight text on clipboard
1068     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
1069         return FALSE;
1070
1071     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
1072     ::CloseClipboard();
1073
1074     return isTextAvailable;
1075 }
1076
1077 // ----------------------------------------------------------------------------
1078 // Accessors
1079 // ----------------------------------------------------------------------------
1080
1081 void wxTextCtrl::SetEditable(bool editable)
1082 {
1083     HWND hWnd = GetHwnd();
1084     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
1085 }
1086
1087 void wxTextCtrl::SetInsertionPoint(long pos)
1088 {
1089     DoSetSelection(pos, pos);
1090 }
1091
1092 void wxTextCtrl::SetInsertionPointEnd()
1093 {
1094     // we must not do anything if the caret is already there because calling
1095     // SetInsertionPoint() thaws the controls if Freeze() had been called even
1096     // if it doesn't actually move the caret anywhere and so the simple fact of
1097     // doing it results in horrible flicker when appending big amounts of text
1098     // to the control in a few chunks (see DoAddText() test in the text sample)
1099     if ( GetInsertionPoint() == GetLastPosition() )
1100         return;
1101
1102     long pos;
1103
1104 #if wxUSE_RICHEDIT
1105     if ( m_verRichEdit == 1 )
1106     {
1107         // we don't have to waste time calling GetLastPosition() in this case
1108         pos = -1;
1109     }
1110     else // !RichEdit 1.0
1111 #endif // wxUSE_RICHEDIT
1112     {
1113         pos = GetLastPosition();
1114     }
1115
1116     SetInsertionPoint(pos);
1117 }
1118
1119 long wxTextCtrl::GetInsertionPoint() const
1120 {
1121 #if wxUSE_RICHEDIT
1122     if ( IsRich() )
1123     {
1124         CHARRANGE range;
1125         range.cpMin = 0;
1126         range.cpMax = 0;
1127         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
1128         return range.cpMin;
1129     }
1130 #endif // wxUSE_RICHEDIT
1131
1132     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
1133     return Pos & 0xFFFF;
1134 }
1135
1136 long wxTextCtrl::GetLastPosition() const
1137 {
1138     int numLines = GetNumberOfLines();
1139     long posStartLastLine = XYToPosition(0, numLines - 1);
1140
1141     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
1142
1143     return posStartLastLine + lenLastLine;
1144 }
1145
1146 // If the return values from and to are the same, there is no
1147 // selection.
1148 void wxTextCtrl::GetSelection(long* from, long* to) const
1149 {
1150 #if wxUSE_RICHEDIT
1151     if ( IsRich() )
1152     {
1153         CHARRANGE charRange;
1154         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
1155
1156         *from = charRange.cpMin;
1157         *to = charRange.cpMax;
1158     }
1159     else
1160 #endif // !wxUSE_RICHEDIT
1161     {
1162         DWORD dwStart, dwEnd;
1163         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
1164
1165         *from = dwStart;
1166         *to = dwEnd;
1167     }
1168 }
1169
1170 bool wxTextCtrl::IsEditable() const
1171 {
1172     // strangely enough, we may be called before the control is created: our
1173     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
1174     // us
1175     if ( !m_hWnd )
1176         return TRUE;
1177
1178     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1179
1180     return (style & ES_READONLY) == 0;
1181 }
1182
1183 // ----------------------------------------------------------------------------
1184 // selection
1185 // ----------------------------------------------------------------------------
1186
1187 void wxTextCtrl::SetSelection(long from, long to)
1188 {
1189     // if from and to are both -1, it means (in wxWidgets) that all text should
1190     // be selected - translate into Windows convention
1191     if ( (from == -1) && (to == -1) )
1192     {
1193         from = 0;
1194         to = -1;
1195     }
1196
1197     DoSetSelection(from, to);
1198 }
1199
1200 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
1201 {
1202     HWND hWnd = GetHwnd();
1203
1204 #if wxUSE_RICHEDIT
1205     if ( IsRich() )
1206     {
1207         CHARRANGE range;
1208         range.cpMin = from;
1209         range.cpMax = to;
1210         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
1211     }
1212     else
1213 #endif // wxUSE_RICHEDIT
1214     {
1215         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
1216     }
1217
1218     if ( scrollCaret )
1219     {
1220 #if wxUSE_RICHEDIT
1221         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1222         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1223         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1224         // option is set (but it does work ok in richedit 1.0 mode...)
1225         //
1226         // so to make it work we either need to give focus to it here which
1227         // will probably create many problems (dummy focus events; window
1228         // containing the text control being brought to foreground
1229         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1230         // create other problems too -- and in fact it does because if we turn
1231         // on/off this style while appending the text to the control, the
1232         // vertical scrollbar never appears in it even if we append tons of
1233         // text and to work around this the only solution I found was to use
1234         // ES_DISABLENOSCROLL
1235         //
1236         // this is very ugly but I don't see any other way to make this work
1237         if ( GetRichVersion() > 1 )
1238         {
1239             if ( !HasFlag(wxTE_NOHIDESEL) )
1240             {
1241                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1242                               ECOOP_OR, ECO_NOHIDESEL);
1243             }
1244             //else: everything is already ok
1245         }
1246 #endif // wxUSE_RICHEDIT
1247
1248         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1249
1250 #if wxUSE_RICHEDIT
1251         // restore ECO_NOHIDESEL if we changed it
1252         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1253         {
1254             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1255                           ECOOP_AND, ~ECO_NOHIDESEL);
1256         }
1257 #endif // wxUSE_RICHEDIT
1258     }
1259 }
1260
1261 // ----------------------------------------------------------------------------
1262 // Working with files
1263 // ----------------------------------------------------------------------------
1264
1265 bool wxTextCtrl::LoadFile(const wxString& file)
1266 {
1267     if ( wxTextCtrlBase::LoadFile(file) )
1268     {
1269         // update the size limit if needed
1270         AdjustSpaceLimit();
1271
1272         return TRUE;
1273     }
1274
1275     return FALSE;
1276 }
1277
1278 // ----------------------------------------------------------------------------
1279 // Editing
1280 // ----------------------------------------------------------------------------
1281
1282 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1283 {
1284     // Set selection and remove it
1285     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
1286
1287     DoWriteText(value, TRUE /* selection only */);
1288 }
1289
1290 void wxTextCtrl::Remove(long from, long to)
1291 {
1292     Replace(from, to, wxEmptyString);
1293 }
1294
1295 bool wxTextCtrl::IsModified() const
1296 {
1297     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1298 }
1299
1300 void wxTextCtrl::MarkDirty()
1301 {
1302     SendMessage(GetHwnd(), EM_SETMODIFY, TRUE, 0L);
1303 }
1304
1305 void wxTextCtrl::DiscardEdits()
1306 {
1307     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1308 }
1309
1310 int wxTextCtrl::GetNumberOfLines() const
1311 {
1312     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1313 }
1314
1315 // ----------------------------------------------------------------------------
1316 // Positions <-> coords
1317 // ----------------------------------------------------------------------------
1318
1319 long wxTextCtrl::XYToPosition(long x, long y) const
1320 {
1321     // This gets the char index for the _beginning_ of this line
1322     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1323
1324     return charIndex + x;
1325 }
1326
1327 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1328 {
1329     HWND hWnd = GetHwnd();
1330
1331     // This gets the line number containing the character
1332     long lineNo;
1333 #if wxUSE_RICHEDIT
1334     if ( IsRich() )
1335     {
1336         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1337     }
1338     else
1339 #endif // wxUSE_RICHEDIT
1340     {
1341         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1342     }
1343
1344     if ( lineNo == -1 )
1345     {
1346         // no such line
1347         return FALSE;
1348     }
1349
1350     // This gets the char index for the _beginning_ of this line
1351     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1352     if ( charIndex == -1 )
1353     {
1354         return FALSE;
1355     }
1356
1357     // The X position must therefore be the different between pos and charIndex
1358     if ( x )
1359         *x = pos - charIndex;
1360     if ( y )
1361         *y = lineNo;
1362
1363     return TRUE;
1364 }
1365
1366 wxTextCtrlHitTestResult
1367 wxTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *col, wxTextCoord *row) const
1368 {
1369     // first get the position from Windows
1370     LPARAM lParam;
1371
1372 #if wxUSE_RICHEDIT
1373     POINTL ptl;
1374     if ( IsRich() )
1375     {
1376         // for rich edit controls the position is passed iva the struct fields
1377         ptl.x = pt.x;
1378         ptl.y = pt.y;
1379         lParam = (LPARAM)&ptl;
1380     }
1381     else
1382 #endif // wxUSE_RICHEDIT
1383     {
1384         // for the plain ones, we are limited to 16 bit positions which are
1385         // combined in a single 32 bit value
1386         lParam = MAKELPARAM(pt.x, pt.y);
1387     }
1388
1389     LRESULT pos = SendMessage(GetHwnd(), EM_CHARFROMPOS, 0, lParam);
1390
1391     if ( pos == -1 )
1392     {
1393         // this seems to indicate an error...
1394         return wxTE_HT_UNKNOWN;
1395     }
1396
1397 #if wxUSE_RICHEDIT
1398     if ( !IsRich() )
1399 #endif // wxUSE_RICHEDIT
1400     {
1401         // for plain EDIT controls the higher word contains something else
1402         pos = LOWORD(pos);
1403     }
1404
1405
1406     // next determine where it is relatively to our point: EM_CHARFROMPOS
1407     // always returns the closest character but we need to be more precise, so
1408     // double check that we really are where it pretends
1409     POINTL ptReal;
1410
1411 #if wxUSE_RICHEDIT
1412     // FIXME: we need to distinguish between richedit 2 and 3 here somehow but
1413     //        we don't know how to do it
1414     if ( IsRich() )
1415     {
1416         SendMessage(GetHwnd(), EM_POSFROMCHAR, (WPARAM)&ptReal, pos);
1417     }
1418     else
1419 #endif // wxUSE_RICHEDIT
1420     {
1421         LRESULT lRc = SendMessage(GetHwnd(), EM_POSFROMCHAR, pos, 0);
1422
1423         if ( lRc == -1 )
1424         {
1425             // this is apparently returned when pos corresponds to the last
1426             // position
1427             ptReal.x =
1428             ptReal.y = 0;
1429         }
1430         else
1431         {
1432             ptReal.x = LOWORD(lRc);
1433             ptReal.y = HIWORD(lRc);
1434         }
1435     }
1436
1437     wxTextCtrlHitTestResult rc;
1438
1439     if ( pt.y > ptReal.y + GetCharHeight() )
1440         rc = wxTE_HT_BELOW;
1441     else if ( pt.x > ptReal.x + GetCharWidth() )
1442         rc = wxTE_HT_BEYOND;
1443     else
1444         rc = wxTE_HT_ON_TEXT;
1445
1446     // finally translate to column/row
1447     if ( !PositionToXY(pos, col, row) )
1448     {
1449         wxFAIL_MSG( _T("PositionToXY() not expected to fail in HitTest()") );
1450     }
1451
1452     return rc;
1453 }
1454
1455 // ----------------------------------------------------------------------------
1456 //
1457 // ----------------------------------------------------------------------------
1458
1459 void wxTextCtrl::ShowPosition(long pos)
1460 {
1461     HWND hWnd = GetHwnd();
1462
1463     // To scroll to a position, we pass the number of lines and characters
1464     // to scroll *by*. This means that we need to:
1465     // (1) Find the line position of the current line.
1466     // (2) Find the line position of pos.
1467     // (3) Scroll by (pos - current).
1468     // For now, ignore the horizontal scrolling.
1469
1470     // Is this where scrolling is relative to - the line containing the caret?
1471     // Or is the first visible line??? Try first visible line.
1472 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1473
1474     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1475
1476     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1477
1478     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1479
1480     if (linesToScroll != 0)
1481       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1482 }
1483
1484 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1485 {
1486     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1487 }
1488
1489 int wxTextCtrl::GetLineLength(long lineNo) const
1490 {
1491     long pos = XYToPosition(0, lineNo);
1492
1493     return GetLengthOfLineContainingPos(pos);
1494 }
1495
1496 wxString wxTextCtrl::GetLineText(long lineNo) const
1497 {
1498     size_t len = (size_t)GetLineLength(lineNo) + 1;
1499
1500     // there must be at least enough place for the length WORD in the
1501     // buffer
1502     len += sizeof(WORD);
1503
1504     wxString str;
1505     {
1506         wxStringBufferLength tmp(str, len);
1507         wxChar *buf = tmp;
1508
1509         *(WORD *)buf = (WORD)len;
1510         len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1511
1512 #if wxUSE_RICHEDIT
1513         if ( IsRich() )
1514         {
1515             // remove the '\r' returned by the rich edit control, the user code
1516             // should never see it
1517             if ( buf[len - 2] == _T('\r') && buf[len - 1] == _T('\n') )
1518             {
1519                 buf[len - 2] = _T('\n');
1520                 len--;
1521             }
1522         }
1523 #endif // wxUSE_RICHEDIT
1524
1525         // remove the '\n' at the end, if any (this is how this function is
1526         // supposed to work according to the docs)
1527         if ( buf[len - 1] == _T('\n') )
1528         {
1529             len--;
1530         }
1531
1532         buf[len] = 0;
1533         tmp.SetLength(len);
1534     }
1535
1536     return str;
1537 }
1538
1539 void wxTextCtrl::SetMaxLength(unsigned long len)
1540 {
1541     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1542 }
1543
1544 // ----------------------------------------------------------------------------
1545 // Undo/redo
1546 // ----------------------------------------------------------------------------
1547
1548 void wxTextCtrl::Undo()
1549 {
1550     if (CanUndo())
1551     {
1552         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1553     }
1554 }
1555
1556 void wxTextCtrl::Redo()
1557 {
1558     if (CanRedo())
1559     {
1560         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1561         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1562     }
1563 }
1564
1565 bool wxTextCtrl::CanUndo() const
1566 {
1567     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1568 }
1569
1570 bool wxTextCtrl::CanRedo() const
1571 {
1572     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1573 }
1574
1575 // ----------------------------------------------------------------------------
1576 // caret handling (Windows only)
1577 // ----------------------------------------------------------------------------
1578
1579 bool wxTextCtrl::ShowNativeCaret(bool show)
1580 {
1581     if ( show != m_isNativeCaretShown )
1582     {
1583         if ( !(show ? ::ShowCaret(GetHwnd()) : ::HideCaret(GetHwnd())) )
1584         {
1585             // not an error, may simply indicate that it's not shown/hidden
1586             // yet (i.e. it had been hidden/showh 2 times before)
1587             return false;
1588         }
1589
1590         m_isNativeCaretShown = show;
1591     }
1592
1593     return true;
1594 }
1595
1596 // ----------------------------------------------------------------------------
1597 // implemenation details
1598 // ----------------------------------------------------------------------------
1599
1600 void wxTextCtrl::Command(wxCommandEvent & event)
1601 {
1602     SetValue(event.GetString());
1603     ProcessCommand (event);
1604 }
1605
1606 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1607 {
1608     // By default, load the first file into the text window.
1609     if (event.GetNumberOfFiles() > 0)
1610     {
1611         LoadFile(event.GetFiles()[0]);
1612     }
1613 }
1614
1615 // ----------------------------------------------------------------------------
1616 // kbd input processing
1617 // ----------------------------------------------------------------------------
1618
1619 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1620 {
1621     MSG *msg = (MSG *)pMsg;
1622
1623     // check for our special keys here: if we don't do it and the parent frame
1624     // uses them as accelerators, they wouldn't work at all, so we disable
1625     // usual preprocessing for them
1626     if ( msg->message == WM_KEYDOWN )
1627     {
1628         WORD vkey = (WORD) msg->wParam;
1629         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1630         {
1631             if ( vkey == VK_BACK )
1632                 return FALSE;
1633         }
1634         else // no Alt
1635         {
1636             // we want to process some Ctrl-foo and Shift-bar but no key
1637             // combinations without either Ctrl or Shift nor with both of them
1638             // pressed
1639             const int ctrl = wxIsCtrlDown(),
1640                       shift = wxIsShiftDown();
1641             switch ( ctrl + shift )
1642             {
1643                 default:
1644                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1645                     // fall through
1646
1647                 case 0:
1648                 case 2:
1649                     break;
1650
1651                 case 1:
1652                     // either Ctrl or Shift pressed
1653                     if ( ctrl )
1654                     {
1655                         switch ( vkey )
1656                         {
1657                             case 'C':
1658                             case 'V':
1659                             case 'X':
1660                             case VK_INSERT:
1661                             case VK_DELETE:
1662                             case VK_HOME:
1663                             case VK_END:
1664                                 return FALSE;
1665                         }
1666                     }
1667                     else // Shift is pressed
1668                     {
1669                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1670                             return FALSE;
1671                     }
1672             }
1673         }
1674     }
1675
1676     return wxControl::MSWShouldPreProcessMessage(pMsg);
1677 }
1678
1679 void wxTextCtrl::OnChar(wxKeyEvent& event)
1680 {
1681     switch ( event.GetKeyCode() )
1682     {
1683         case WXK_RETURN:
1684             if ( !HasFlag(wxTE_MULTILINE) )
1685             {
1686                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1687                 InitCommandEvent(event);
1688                 event.SetString(GetValue());
1689                 if ( GetEventHandler()->ProcessEvent(event) )
1690                     return;
1691             }
1692             //else: multiline controls need Enter for themselves
1693
1694             break;
1695
1696         case WXK_TAB:
1697             // ok, so this is getting absolutely ridiculous but I don't see
1698             // any other way to fix this bug: when a multiline text control is
1699             // inside a wxFrame, we need to generate the navigation event as
1700             // otherwise nothing happens at all, but when the same control is
1701             // created inside a dialog, IsDialogMessage() *does* switch focus
1702             // all by itself and so if we do it here as well, it is advanced
1703             // twice and goes to the next control... to prevent this from
1704             // happening we're doing this ugly check, the logic being that if
1705             // we don't have focus then it had been already changed to the next
1706             // control
1707             //
1708             // the right thing to do would, of course, be to understand what
1709             // the hell is IsDialogMessage() doing but this is beyond my feeble
1710             // forces at the moment unfortunately
1711             if ( !(m_windowStyle & wxTE_PROCESS_TAB))
1712             {
1713                 if ( FindFocus() == this )
1714                 {
1715                     int flags = 0;
1716                     if (!event.ShiftDown())
1717                         flags |= wxNavigationKeyEvent::IsForward ;
1718                     if (event.ControlDown())
1719                         flags |= wxNavigationKeyEvent::WinChange ;
1720                     if (Navigate(flags))
1721                         return;
1722                 }
1723             }
1724             else
1725             {
1726                 // Insert tab since calling the default Windows handler
1727                 // doesn't seem to do it
1728                 WriteText(wxT("\t"));
1729             }
1730             break;
1731     }
1732
1733     // no, we didn't process it
1734     event.Skip();
1735 }
1736
1737 WXLRESULT wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1738 {
1739     WXLRESULT lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1740
1741     if ( nMsg == WM_GETDLGCODE )
1742     {
1743         // we always want the chars and the arrows: the arrows for navigation
1744         // and the chars because we want Ctrl-C to work even in a read only
1745         // control
1746         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1747
1748         if ( IsEditable() )
1749         {
1750             // we may have several different cases:
1751             // 1. normal case: both TAB and ENTER are used for dlg navigation
1752             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1753             //    next control in the dialog
1754             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1755             //    navigation
1756             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1757             //    to the next control
1758
1759             // the multiline edit control should always get <Return> for itself
1760             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1761                 lDlgCode |= DLGC_WANTMESSAGE;
1762
1763             if ( HasFlag(wxTE_PROCESS_TAB) )
1764                 lDlgCode |= DLGC_WANTTAB;
1765
1766             lRc |= lDlgCode;
1767         }
1768         else // !editable
1769         {
1770             // NB: use "=", not "|=" as the base class version returns the
1771             //     same flags is this state as usual (i.e. including
1772             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1773             //     native Win32 apps?) but for now live with it.
1774             lRc = lDlgCode;
1775         }
1776     }
1777
1778     return lRc;
1779 }
1780
1781 // ----------------------------------------------------------------------------
1782 // text control event processing
1783 // ----------------------------------------------------------------------------
1784
1785 bool wxTextCtrl::SendUpdateEvent()
1786 {
1787     // is event reporting suspended?
1788     if ( m_suppressNextUpdate )
1789     {
1790         // do process the next one
1791         m_suppressNextUpdate = FALSE;
1792
1793         return FALSE;
1794     }
1795
1796     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1797     InitCommandEvent(event);
1798     event.SetString(GetValue());
1799
1800     return ProcessCommand(event);
1801 }
1802
1803 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1804 {
1805     switch ( param )
1806     {
1807         case EN_SETFOCUS:
1808         case EN_KILLFOCUS:
1809             {
1810                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1811                                                          : wxEVT_SET_FOCUS,
1812                                    m_windowId);
1813                 event.SetEventObject(this);
1814                 GetEventHandler()->ProcessEvent(event);
1815             }
1816             break;
1817
1818         case EN_CHANGE:
1819             SendUpdateEvent();
1820             break;
1821
1822         case EN_MAXTEXT:
1823             // the text size limit has been hit -- try to increase it
1824             if ( !AdjustSpaceLimit() )
1825             {
1826                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1827                 InitCommandEvent(event);
1828                 event.SetString(GetValue());
1829                 ProcessCommand(event);
1830             }
1831             break;
1832
1833             // the other edit notification messages are not processed
1834         default:
1835             return FALSE;
1836     }
1837
1838     // processed
1839     return TRUE;
1840 }
1841
1842 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1843 #if wxUSE_CTL3D
1844                                WXUINT message,
1845                                WXWPARAM wParam,
1846                                WXLPARAM lParam
1847 #else
1848                                WXUINT WXUNUSED(message),
1849                                WXWPARAM WXUNUSED(wParam),
1850                                WXLPARAM WXUNUSED(lParam)
1851 #endif
1852     )
1853 {
1854 #if wxUSE_CTL3D
1855     if ( m_useCtl3D )
1856     {
1857         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1858         return (WXHBRUSH) hbrush;
1859     }
1860 #endif // wxUSE_CTL3D
1861
1862     HDC hdc = (HDC)pDC;
1863     wxColour colBack = GetBackgroundColour();
1864
1865     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1866         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1867
1868     ::SetBkColor(hdc, wxColourToRGB(colBack));
1869     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1870
1871     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1872
1873     return (WXHBRUSH)brush->GetResourceHandle();
1874 }
1875
1876 bool wxTextCtrl::AdjustSpaceLimit()
1877 {
1878     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1879
1880     // HACK: we try to automatically extend the limit for the amount of text
1881     //       to allow (interactively) entering more than 64Kb of text under
1882     //       Win9x but we shouldn't reset the text limit which was previously
1883     //       set explicitly with SetMaxLength()
1884     //
1885     //       we could solve this by storing the limit we set in wxTextCtrl but
1886     //       to save space we prefer to simply test here the actual limit
1887     //       value: we consider that SetMaxLength() can only be called for
1888     //       values < 32Kb
1889     if ( limit < 0x8000 )
1890     {
1891         // we've got more text than limit set by SetMaxLength()
1892         return FALSE;
1893     }
1894
1895     unsigned int len = ::GetWindowTextLength(GetHwnd());
1896     if ( len >= limit )
1897     {
1898         limit = len + 0x8000;    // 32Kb
1899
1900 #if wxUSE_RICHEDIT
1901         if ( IsRich() )
1902         {
1903             // as a nice side effect, this also allows passing limit > 64Kb
1904             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1905         }
1906         else
1907 #endif // wxUSE_RICHEDIT
1908         {
1909             if ( limit > 0xffff )
1910             {
1911                 // this will set it to a platform-dependent maximum (much more
1912                 // than 64Kb under NT)
1913                 limit = 0;
1914             }
1915
1916             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1917         }
1918     }
1919
1920     // we changed the limit
1921     return TRUE;
1922 }
1923
1924 bool wxTextCtrl::AcceptsFocus() const
1925 {
1926     // we don't want focus if we can't be edited unless we're a multiline
1927     // control because then it might be still nice to get focus from keyboard
1928     // to be able to scroll it without mouse
1929     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1930 }
1931
1932 wxSize wxTextCtrl::DoGetBestSize() const
1933 {
1934     int cx, cy;
1935     wxGetCharSize(GetHWND(), &cx, &cy, GetFont());
1936
1937     int wText = DEFAULT_ITEM_WIDTH;
1938
1939     int hText = cy;
1940     if ( m_windowStyle & wxTE_MULTILINE )
1941     {
1942         hText *= wxMax(GetNumberOfLines(), 5);
1943     }
1944     //else: for single line control everything is ok
1945
1946     // we have to add the adjustments for the control height only once, not
1947     // once per line, so do it after multiplication above
1948     hText += EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy) - cy;
1949
1950     return wxSize(wText, hText);
1951 }
1952
1953 // ----------------------------------------------------------------------------
1954 // standard handlers for standard edit menu events
1955 // ----------------------------------------------------------------------------
1956
1957 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1958 {
1959     Cut();
1960 }
1961
1962 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1963 {
1964     Copy();
1965 }
1966
1967 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1968 {
1969     Paste();
1970 }
1971
1972 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1973 {
1974     Undo();
1975 }
1976
1977 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1978 {
1979     Redo();
1980 }
1981
1982 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
1983 {
1984     long from, to;
1985     GetSelection(& from, & to);
1986     if (from != -1 && to != -1)
1987         Remove(from, to);
1988 }
1989
1990 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1991 {
1992     SetSelection(-1, -1);
1993 }
1994
1995 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1996 {
1997     event.Enable( CanCut() );
1998 }
1999
2000 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2001 {
2002     event.Enable( CanCopy() );
2003 }
2004
2005 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2006 {
2007     event.Enable( CanPaste() );
2008 }
2009
2010 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2011 {
2012     event.Enable( CanUndo() );
2013 }
2014
2015 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2016 {
2017     event.Enable( CanRedo() );
2018 }
2019
2020 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
2021 {
2022     long from, to;
2023     GetSelection(& from, & to);
2024     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
2025 }
2026
2027 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2028 {
2029     event.Enable(GetLastPosition() > 0);
2030 }
2031
2032 void wxTextCtrl::OnRightClick(wxMouseEvent& event)
2033 {
2034 #if wxUSE_RICHEDIT
2035     if (IsRich())
2036     {
2037         if (!m_privateContextMenu)
2038         {
2039             m_privateContextMenu = new wxMenu;
2040             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
2041             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
2042             m_privateContextMenu->AppendSeparator();
2043             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
2044             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
2045             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
2046             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
2047             m_privateContextMenu->AppendSeparator();
2048             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
2049         }
2050         PopupMenu(m_privateContextMenu, event.GetPosition());
2051         return;
2052     }
2053     else
2054 #endif
2055     event.Skip();
2056 }
2057
2058 void wxTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
2059 {
2060     // be sure the caret remains invisible if the user had hidden it
2061     if ( !m_isNativeCaretShown )
2062     {
2063         ::HideCaret(GetHwnd());
2064     }
2065 }
2066
2067 // the rest of the file only deals with the rich edit controls
2068 #if wxUSE_RICHEDIT
2069
2070 // ----------------------------------------------------------------------------
2071 // EN_LINK processing
2072 // ----------------------------------------------------------------------------
2073
2074 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
2075 {
2076     NMHDR *hdr = (NMHDR* )lParam;
2077     switch ( hdr->code )
2078     {
2079        case EN_MSGFILTER:
2080             {
2081                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
2082                 UINT msg = msgf->msg;
2083
2084                 // this is a bit crazy but richedit 1.0 sends us all mouse
2085                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
2086                 // generate the wxWin events for this message manually
2087                 //
2088                 // NB: in fact, this is still not totally correct as it does
2089                 //     send us WM_LBUTTONUP if the selection was cleared by the
2090                 //     last click -- so currently we get 2 events in this case,
2091                 //     but as I don't see any obvious way to check for this I
2092                 //     leave this code in place because it's still better than
2093                 //     not getting left up events at all
2094                 if ( msg == WM_LBUTTONUP )
2095                 {
2096                     WXUINT flags = msgf->wParam;
2097                     int x = GET_X_LPARAM(msgf->lParam),
2098                         y = GET_Y_LPARAM(msgf->lParam);
2099
2100                     HandleMouseEvent(msg, x, y, flags);
2101                 }
2102             }
2103
2104             // return TRUE to process the event (and FALSE to ignore it)
2105             return TRUE;
2106
2107         case EN_LINK:
2108             {
2109                 const ENLINK *enlink = (ENLINK *)hdr;
2110
2111                 switch ( enlink->msg )
2112                 {
2113                     case WM_SETCURSOR:
2114                         // ok, so it is hardcoded - do we really nee to
2115                         // customize it?
2116                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
2117                         *result = TRUE;
2118                         break;
2119
2120                     case WM_MOUSEMOVE:
2121                     case WM_LBUTTONDOWN:
2122                     case WM_LBUTTONUP:
2123                     case WM_LBUTTONDBLCLK:
2124                     case WM_RBUTTONDOWN:
2125                     case WM_RBUTTONUP:
2126                     case WM_RBUTTONDBLCLK:
2127                         // send a mouse event
2128                         {
2129                             static const wxEventType eventsMouse[] =
2130                             {
2131                                 wxEVT_MOTION,
2132                                 wxEVT_LEFT_DOWN,
2133                                 wxEVT_LEFT_UP,
2134                                 wxEVT_LEFT_DCLICK,
2135                                 wxEVT_RIGHT_DOWN,
2136                                 wxEVT_RIGHT_UP,
2137                                 wxEVT_RIGHT_DCLICK,
2138                             };
2139
2140                             // the event ids are consecutive
2141                             wxMouseEvent
2142                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
2143
2144                             InitMouseEvent(evtMouse,
2145                                            GET_X_LPARAM(enlink->lParam),
2146                                            GET_Y_LPARAM(enlink->lParam),
2147                                            enlink->wParam);
2148
2149                             wxTextUrlEvent event(m_windowId, evtMouse,
2150                                                  enlink->chrg.cpMin,
2151                                                  enlink->chrg.cpMax);
2152
2153                             InitCommandEvent(event);
2154
2155                             *result = ProcessCommand(event);
2156                         }
2157                         break;
2158                 }
2159             }
2160             return TRUE;
2161     }
2162
2163     // not processed, leave it to the base class
2164     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
2165 }
2166
2167 // ----------------------------------------------------------------------------
2168 // colour setting for the rich edit controls
2169 // ----------------------------------------------------------------------------
2170
2171 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
2172 {
2173     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
2174     {
2175         // colour didn't really change
2176         return FALSE;
2177     }
2178
2179     if ( IsRich() )
2180     {
2181         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
2182         // EM_SETBKGNDCOLOR additionally
2183         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
2184     }
2185
2186     return TRUE;
2187 }
2188
2189 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
2190 {
2191     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
2192     {
2193         // colour didn't really change
2194         return FALSE;
2195     }
2196
2197     if ( IsRich() )
2198     {
2199         // change the colour of everything
2200         CHARFORMAT cf;
2201         wxZeroMemory(cf);
2202         cf.cbSize = sizeof(cf);
2203         cf.dwMask = CFM_COLOR;
2204         cf.crTextColor = wxColourToRGB(colour);
2205         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
2206     }
2207
2208     return TRUE;
2209 }
2210
2211 // ----------------------------------------------------------------------------
2212 // styling support for rich edit controls
2213 // ----------------------------------------------------------------------------
2214
2215 #if wxUSE_RICHEDIT
2216
2217 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2218 {
2219     if ( !IsRich() )
2220     {
2221         // can't do it with normal text control
2222         return FALSE;
2223     }
2224
2225     // the richedit 1.0 doesn't handle setting background colour, so don't
2226     // even try to do anything if it's the only thing we want to change
2227     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
2228         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
2229         !style.HasTabs() )
2230     {
2231         // nothing to do: return TRUE if there was really nothing to do and
2232         // FALSE if we failed to set bg colour
2233         return !style.HasBackgroundColour();
2234     }
2235
2236     // order the range if needed
2237     if ( start > end )
2238     {
2239         long tmp = start;
2240         start = end;
2241         end = tmp;
2242     }
2243
2244     // we can only change the format of the selection, so select the range we
2245     // want and restore the old selection later
2246     long startOld, endOld;
2247     GetSelection(&startOld, &endOld);
2248
2249     // but do we really have to change the selection?
2250     bool changeSel = start != startOld || end != endOld;
2251
2252     if ( changeSel )
2253     {
2254         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
2255     }
2256
2257     // initialize CHARFORMAT struct
2258 #if wxUSE_RICHEDIT2
2259     CHARFORMAT2 cf;
2260 #else
2261     CHARFORMAT cf;
2262 #endif
2263
2264     wxZeroMemory(cf);
2265
2266     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2267     // CHARFORMAT in that case
2268 #if wxUSE_RICHEDIT2
2269     if ( m_verRichEdit == 1 )
2270     {
2271         // this is the only thing the control is going to grok
2272         cf.cbSize = sizeof(CHARFORMAT);
2273     }
2274     else
2275 #endif
2276     {
2277         // CHARFORMAT or CHARFORMAT2
2278         cf.cbSize = sizeof(cf);
2279     }
2280
2281     if ( style.HasFont() )
2282     {
2283         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
2284         //     but using it doesn't seem to hurt neither so leaving it for now
2285
2286         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
2287                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
2288
2289         // fill in data from LOGFONT but recalculate lfHeight because we need
2290         // the real height in twips and not the negative number which
2291         // wxFillLogFont() returns (this is correct in general and works with
2292         // the Windows font mapper, but not here)
2293         LOGFONT lf;
2294         wxFillLogFont(&lf, &style.GetFont());
2295         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
2296         cf.bCharSet = lf.lfCharSet;
2297         cf.bPitchAndFamily = lf.lfPitchAndFamily;
2298         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
2299
2300         // also deal with underline/italic/bold attributes: note that we must
2301         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
2302         // style to allow clearing it
2303         if ( lf.lfItalic )
2304         {
2305             cf.dwEffects |= CFE_ITALIC;
2306         }
2307
2308         if ( lf.lfWeight == FW_BOLD )
2309         {
2310             cf.dwEffects |= CFE_BOLD;
2311         }
2312
2313         if ( lf.lfUnderline )
2314         {
2315             cf.dwEffects |= CFE_UNDERLINE;
2316         }
2317
2318         // strikeout fonts are not supported by wxWidgets
2319     }
2320
2321     if ( style.HasTextColour() )
2322     {
2323         cf.dwMask |= CFM_COLOR;
2324         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2325     }
2326
2327 #if wxUSE_RICHEDIT2
2328     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2329     {
2330         cf.dwMask |= CFM_BACKCOLOR;
2331         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2332     }
2333 #endif // wxUSE_RICHEDIT2
2334
2335     // do format the selection
2336     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
2337                             SCF_SELECTION, (LPARAM)&cf) != 0;
2338     if ( !ok )
2339     {
2340         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
2341     }
2342
2343     // now do the paragraph formatting
2344     PARAFORMAT2 pf;
2345     wxZeroMemory(pf);
2346     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2347     // PARAFORMAT in that case
2348 #if wxUSE_RICHEDIT2
2349     if ( m_verRichEdit == 1 )
2350     {
2351         // this is the only thing the control is going to grok
2352         pf.cbSize = sizeof(PARAFORMAT);
2353     }
2354     else
2355 #endif
2356     {
2357         // PARAFORMAT or PARAFORMAT2
2358         pf.cbSize = sizeof(pf);
2359     }
2360
2361     if (style.HasAlignment())
2362     {
2363         pf.dwMask |= PFM_ALIGNMENT;
2364         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2365             pf.wAlignment = PFA_RIGHT;
2366         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2367             pf.wAlignment = PFA_CENTER;
2368         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2369             pf.wAlignment = PFA_JUSTIFY;
2370         else
2371             pf.wAlignment = PFA_LEFT;
2372     }
2373
2374     if (style.HasLeftIndent())
2375     {
2376         pf.dwMask |= PFM_STARTINDENT | PFM_OFFSET;
2377
2378         // Convert from 1/10 mm to TWIPS
2379         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2380         pf.dxOffset = (int) (((double) style.GetLeftSubIndent()) * mm2twips / 10.0) ;
2381     }
2382
2383     if (style.HasRightIndent())
2384     {
2385         pf.dwMask |= PFM_RIGHTINDENT;
2386
2387         // Convert from 1/10 mm to TWIPS
2388         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2389     }
2390
2391     if (style.HasTabs())
2392     {
2393         pf.dwMask |= PFM_TABSTOPS;
2394
2395         const wxArrayInt& tabs = style.GetTabs();
2396
2397         pf.cTabCount = wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2398         size_t i;
2399         for (i = 0; i < (size_t) pf.cTabCount; i++)
2400         {
2401             // Convert from 1/10 mm to TWIPS
2402             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2403         }
2404     }
2405
2406     if (pf.dwMask != 0)
2407     {
2408         // do format the selection
2409         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2410             0, (LPARAM) &pf) != 0;
2411         if ( !ok )
2412         {
2413             wxLogDebug(_T("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2414         }
2415     }
2416
2417     if ( changeSel )
2418     {
2419         // restore the original selection
2420         DoSetSelection(startOld, endOld, FALSE);
2421     }
2422
2423     return ok;
2424 }
2425
2426 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2427 {
2428     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2429         return FALSE;
2430
2431     // we have to do this or the style wouldn't apply for the text typed by the
2432     // user
2433     long posLast = GetLastPosition();
2434     SetStyle(posLast, posLast, m_defaultStyle);
2435
2436     return TRUE;
2437 }
2438
2439 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2440 {
2441     if ( !IsRich() )
2442     {
2443         // can't do it with normal text control
2444         return FALSE;
2445     }
2446
2447     // initialize CHARFORMAT struct
2448 #if wxUSE_RICHEDIT2
2449     CHARFORMAT2 cf;
2450 #else
2451     CHARFORMAT cf;
2452 #endif
2453
2454     wxZeroMemory(cf);
2455
2456     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2457     // CHARFORMAT in that case
2458 #if wxUSE_RICHEDIT2
2459     if ( m_verRichEdit == 1 )
2460     {
2461         // this is the only thing the control is going to grok
2462         cf.cbSize = sizeof(CHARFORMAT);
2463     }
2464     else
2465 #endif
2466     {
2467         // CHARFORMAT or CHARFORMAT2
2468         cf.cbSize = sizeof(cf);
2469     }
2470     // we can only change the format of the selection, so select the range we
2471     // want and restore the old selection later
2472     long startOld, endOld;
2473     GetSelection(&startOld, &endOld);
2474
2475     // but do we really have to change the selection?
2476     bool changeSel = position != startOld || position != endOld;
2477
2478     if ( changeSel )
2479     {
2480         DoSetSelection(position, position, FALSE /* don't scroll caret into view */);
2481     }
2482
2483     // get the selection formatting
2484     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2485                             SCF_SELECTION, (LPARAM)&cf) ;
2486
2487     LOGFONT lf;
2488     lf.lfHeight = cf.yHeight;
2489     lf.lfWidth = 0;
2490     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2491     lf.lfClipPrecision = 0;
2492     lf.lfEscapement = 0;
2493     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2494     if (cf.dwEffects & CFE_ITALIC)
2495         lf.lfItalic = TRUE;
2496     lf.lfOrientation = 0;
2497     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2498     lf.lfQuality = 0;
2499     if (cf.dwEffects & CFE_STRIKEOUT)
2500         lf.lfStrikeOut = TRUE;
2501     if (cf.dwEffects & CFE_UNDERLINE)
2502         lf.lfUnderline = TRUE;
2503     if (cf.dwEffects & CFE_BOLD)
2504         lf.lfWeight = FW_BOLD;
2505
2506     wxFont font = wxCreateFontFromLogFont(& lf);
2507     if (font.Ok())
2508     {
2509         style.SetFont(font);
2510     }
2511     style.SetTextColour(wxColour(cf.crTextColor));
2512
2513 #if wxUSE_RICHEDIT2
2514     if ( m_verRichEdit != 1 )
2515     {
2516         // cf.dwMask |= CFM_BACKCOLOR;
2517         style.SetBackgroundColour(wxColour(cf.crBackColor));
2518     }
2519 #endif // wxUSE_RICHEDIT2
2520
2521     // now get the paragraph formatting
2522     PARAFORMAT2 pf;
2523     wxZeroMemory(pf);
2524     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2525     // PARAFORMAT in that case
2526 #if wxUSE_RICHEDIT2
2527     if ( m_verRichEdit == 1 )
2528     {
2529         // this is the only thing the control is going to grok
2530         pf.cbSize = sizeof(PARAFORMAT);
2531     }
2532     else
2533 #endif
2534     {
2535         // PARAFORMAT or PARAFORMAT2
2536         pf.cbSize = sizeof(pf);
2537     }
2538
2539     // do format the selection
2540     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2541
2542     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0), (int) ((double) pf.dxOffset * twips2mm * 10.0) );
2543     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2544
2545     if (pf.wAlignment == PFA_CENTER)
2546         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2547     else if (pf.wAlignment == PFA_RIGHT)
2548         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2549     else if (pf.wAlignment == PFA_JUSTIFY)
2550         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2551     else
2552         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2553
2554     wxArrayInt tabStops;
2555     size_t i;
2556     for (i = 0; i < (size_t) pf.cTabCount; i++)
2557     {
2558         tabStops.Add( (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) );
2559     }
2560
2561     if ( changeSel )
2562     {
2563         // restore the original selection
2564         DoSetSelection(startOld, endOld, FALSE);
2565     }
2566
2567     return TRUE;
2568 }
2569
2570 #endif
2571
2572 // ----------------------------------------------------------------------------
2573 // wxRichEditModule
2574 // ----------------------------------------------------------------------------
2575
2576 bool wxRichEditModule::OnInit()
2577 {
2578     // don't do anything - we will load it when needed
2579     return TRUE;
2580 }
2581
2582 void wxRichEditModule::OnExit()
2583 {
2584     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2585     {
2586         if ( ms_hRichEdit[i] )
2587         {
2588             ::FreeLibrary(ms_hRichEdit[i]);
2589             ms_hRichEdit[i] = NULL;
2590         }
2591     }
2592 }
2593
2594 /* static */
2595 bool wxRichEditModule::Load(int version)
2596 {
2597     // we don't support loading richedit 3.0 as I don't know how to distinguish
2598     // it from 2.0 anyhow
2599     wxCHECK_MSG( version == 1 || version == 2, FALSE,
2600                  _T("incorrect richedit control version requested") );
2601
2602     // make it the index in the array
2603     version--;
2604
2605     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2606     {
2607         // we had already tried to load it and failed
2608         return FALSE;
2609     }
2610
2611     if ( ms_hRichEdit[version] )
2612     {
2613         // we've already got this one
2614         return TRUE;
2615     }
2616
2617     wxString dllname = version ? _T("riched20") : _T("riched32");
2618     dllname += _T(".dll");
2619
2620     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2621
2622     if ( !ms_hRichEdit[version] )
2623     {
2624         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2625
2626         ms_hRichEdit[version] = (HINSTANCE)-1;
2627
2628         return FALSE;
2629     }
2630
2631     return TRUE;
2632 }
2633
2634 #endif // wxUSE_RICHEDIT
2635
2636 #endif // wxUSE_TEXTCTRL