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_RIGHT_UP(wxTextCtrl::OnRightClick)
 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     m_isCaretAtEnd = true;
 255 }
 256
 257 wxTextCtrl::~wxTextCtrl()
 258 {
 259     delete m_privateContextMenu;
 260 }
 261
 262 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 263                         const wxString& value,
 264                         const wxPoint& pos,
 265                         const wxSize& size,
 266                         long style,
 267                         const wxValidator& validator,
 268                         const wxString& name)
 269 {
 270 #ifdef __WXWINCE__
 271     if ((style & wxBORDER_MASK) == 0)
 272         style |= wxBORDER_SIMPLE;
 273 #endif
 274
 275     // base initialization
 276     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 277         return false;
 278
 279     // translate wxWin style flags to MSW ones
 280     WXDWORD msStyle = MSWGetCreateWindowFlags();
 281
 282     // do create the control - either an EDIT or RICHEDIT
 283     wxString windowClass = wxT("EDIT");
 284
 285 #if wxUSE_RICHEDIT
 286     if ( m_windowStyle & wxTE_AUTO_URL )
 287     {
 288         // automatic URL detection only works in RichEdit 2.0+
 289         m_windowStyle |= wxTE_RICH2;
 290     }
 291
 292     if ( m_windowStyle & wxTE_RICH2 )
 293     {
 294         // using richedit 2.0 implies using wxTE_RICH
 295         m_windowStyle |= wxTE_RICH;
 296     }
 297
 298     // we need to load the richedit DLL before creating the rich edit control
 299     if ( m_windowStyle & wxTE_RICH )
 300     {
 301         static bool s_errorGiven = false;// MT-FIXME
 302
 303         // Which version do we need? Use 1.0 by default because it is much more
 304         // like the the standard EDIT or 2.0 if explicitly requested, but use
 305         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 306         //
 307         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 308         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 309         //       should use 3.0 if available as it is the best of both worlds -
 310         //       but as I can't test it right now I don't do it (VZ)
 311 #if wxUSE_UNICODE
 312         const int verRichEdit = 2;
 313 #else // !wxUSE_UNICODE
 314         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 315 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 316
 317         // only give the error msg once if the DLL can't be loaded
 318         if ( !s_errorGiven )
 319         {
 320             // try to load the RichEdit DLL (will do nothing if already done)
 321             if ( !wxRichEditModule::Load(verRichEdit) )
 322             {
 323 #if !wxUSE_UNICODE
 324                 // try another version?
 325                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 326
 327                 if ( !wxRichEditModule::Load(verRichEdit) )
 328 #endif // wxUSE_UNICODE
 329                 {
 330                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 331
 332                     s_errorGiven = true;
 333                 }
 334             }
 335         }
 336
 337         // have we managed to load any richedit version?
 338         if ( !s_errorGiven )
 339         {
 340             m_verRichEdit = verRichEdit;
 341             if ( m_verRichEdit == 1 )
 342             {
 343                 windowClass = wxT("RICHEDIT");
 344             }
 345             else
 346             {
 347 #ifndef RICHEDIT_CLASS
 348                 wxString RICHEDIT_CLASS;
 349                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 350 #if wxUSE_UNICODE
 351                 RICHEDIT_CLASS += _T('W');
 352 #else // ANSI
 353                 RICHEDIT_CLASS += _T('A');
 354 #endif // Unicode/ANSI
 355 #endif // !RICHEDIT_CLASS
 356
 357                 windowClass = RICHEDIT_CLASS;
 358             }
 359         }
 360     }
 361 #endif // wxUSE_RICHEDIT
 362
 363     // we need to turn '\n's into "\r\n"s for the multiline controls
 364     wxString valueWin;
 365     if ( m_windowStyle & wxTE_MULTILINE )
 366     {
 367         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 368     }
 369     else // single line
 370     {
 371         valueWin = value;
 372     }
 373
 374     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 375         return false;
 376
 377 #if wxUSE_RICHEDIT
 378     if ( IsRich() )
 379     {
 380         // enable the events we're interested in: we want to get EN_CHANGE as
 381         // for the normal controls
 382         LPARAM mask = ENM_CHANGE;
 383
 384         if ( GetRichVersion() == 1 )
 385         {
 386             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 387             // explained in its handler
 388            mask |= ENM_MOUSEEVENTS;
 389         }
 390         else if ( m_windowStyle & wxTE_AUTO_URL )
 391         {
 392             mask |= ENM_LINK;
 393
 394             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 395         }
 396
 397         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 398     }
 399 #endif // wxUSE_RICHEDIT
 400
 401     return true;
 402 }
 403
 404 // Make sure the window style (etc.) reflects the HWND style (roughly)
 405 void wxTextCtrl::AdoptAttributesFromHWND()
 406 {
 407     wxWindow::AdoptAttributesFromHWND();
 408
 409     HWND hWnd = GetHwnd();
 410     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 411
 412     // retrieve the style to see whether this is an edit or richedit ctrl
 413 #if wxUSE_RICHEDIT
 414     wxString classname = wxGetWindowClass(GetHWND());
 415
 416     if ( classname.IsSameAs(_T("EDIT"), false /* no case */) )
 417     {
 418         m_verRichEdit = 0;
 419     }
 420     else // rich edit?
 421     {
 422         wxChar c;
 423         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 424         {
 425             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 426
 427             m_verRichEdit = 0;
 428         }
 429     }
 430 #endif // wxUSE_RICHEDIT
 431
 432     if (style & ES_MULTILINE)
 433         m_windowStyle |= wxTE_MULTILINE;
 434     if (style & ES_PASSWORD)
 435         m_windowStyle |= wxTE_PASSWORD;
 436     if (style & ES_READONLY)
 437         m_windowStyle |= wxTE_READONLY;
 438     if (style & ES_WANTRETURN)
 439         m_windowStyle |= wxTE_PROCESS_ENTER;
 440     if (style & ES_CENTER)
 441         m_windowStyle |= wxTE_CENTRE;
 442     if (style & ES_RIGHT)
 443         m_windowStyle |= wxTE_RIGHT;
 444 }
 445
 446 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 447 {
 448     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 449
 450     // styles which we alaways add by default
 451     if ( style & wxTE_MULTILINE )
 452     {
 453         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 454                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 455
 456         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 457         if ( !(style & wxTE_NO_VSCROLL) )
 458         {
 459             // always adjust the vertical scrollbar automatically if we have it
 460             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 461
 462 #if wxUSE_RICHEDIT
 463             // we have to use this style for the rich edit controls because
 464             // without it the vertical scrollbar never appears at all in
 465             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 466             if ( style & wxTE_RICH2 )
 467             {
 468                 msStyle |= ES_DISABLENOSCROLL;
 469             }
 470 #endif // wxUSE_RICHEDIT
 471         }
 472
 473         style |= wxTE_PROCESS_ENTER;
 474     }
 475     else // !multiline
 476     {
 477         // there is really no reason to not have this style for single line
 478         // text controls
 479         msStyle |= ES_AUTOHSCROLL;
 480     }
 481
 482     // note that wxTE_DONTWRAP is the same as wxHSCROLL so if we have a horz
 483     // scrollbar, there is no wrapping -- which makes sense
 484     if ( style & wxTE_DONTWRAP )
 485     {
 486         // automatically scroll the control horizontally as necessary
 487         //
 488         // NB: ES_AUTOHSCROLL is needed for richedit controls or they don't
 489         //     show horz scrollbar at all, even in spite of WS_HSCROLL, and as
 490         //     it doesn't seem to do any harm for plain edit controls, add it
 491         //     always
 492         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 493     }
 494
 495     if ( style & wxTE_READONLY )
 496         msStyle |= ES_READONLY;
 497
 498     if ( style & wxTE_PASSWORD )
 499         msStyle |= ES_PASSWORD;
 500
 501     if ( style & wxTE_NOHIDESEL )
 502         msStyle |= ES_NOHIDESEL;
 503
 504     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 505     if ( style & wxTE_CENTRE )
 506         msStyle |= ES_CENTER;
 507     else if ( style & wxTE_RIGHT )
 508         msStyle |= ES_RIGHT;
 509     else
 510         msStyle |= ES_LEFT; // ES_LEFT is 0 as well but for consistency...
 511
 512     return msStyle;
 513 }
 514
 515 void wxTextCtrl::SetWindowStyleFlag(long style)
 516 {
 517 #if wxUSE_RICHEDIT
 518     // we have to deal with some styles separately because they can't be
 519     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 520     // using richedit-specific EM_SETOPTIONS
 521     if ( IsRich() &&
 522             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 523     {
 524         bool set = (style & wxTE_NOHIDESEL) != 0;
 525
 526         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 527                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 528     }
 529 #endif // wxUSE_RICHEDIT
 530
 531     wxControl::SetWindowStyleFlag(style);
 532 }
 533
 534 // ----------------------------------------------------------------------------
 535 // set/get the controls text
 536 // ----------------------------------------------------------------------------
 537
 538 wxString wxTextCtrl::GetValue() const
 539 {
 540     // range 0..-1 is special for GetRange() and means to retrieve all text
 541     return GetRange(0, -1);
 542 }
 543
 544 wxString wxTextCtrl::GetRange(long from, long to) const
 545 {
 546     wxString str;
 547
 548     if ( from >= to && to != -1 )
 549     {
 550         // nothing to retrieve
 551         return str;
 552     }
 553
 554 #if wxUSE_RICHEDIT
 555     if ( IsRich() )
 556     {
 557         int len = GetWindowTextLength(GetHwnd());
 558         if ( len > from )
 559         {
 560             if ( to == -1 )
 561                 to = len;
 562
 563 #if !wxUSE_UNICODE
 564             // we must use EM_STREAMOUT if we don't want to lose all characters
 565             // not representable in the current character set (EM_GETTEXTRANGE
 566             // simply replaces them with question marks...)
 567             if ( GetRichVersion() > 1 )
 568             {
 569                 // we must have some encoding, otherwise any 8bit chars in the
 570                 // control are simply *lost* (replaced by '?')
 571                 wxFontEncoding encoding = wxFONTENCODING_SYSTEM;
 572
 573                 wxFont font = m_defaultStyle.GetFont();
 574                 if ( !font.Ok() )
 575                     font = GetFont();
 576
 577                 if ( font.Ok() )
 578                 {
 579                    encoding = font.GetEncoding();
 580                 }
 581
 582                 if ( encoding == wxFONTENCODING_SYSTEM )
 583                 {
 584                     encoding = wxLocale::GetSystemEncoding();
 585                 }
 586
 587                 if ( encoding == wxFONTENCODING_SYSTEM )
 588                 {
 589                     encoding = wxFONTENCODING_ISO8859_1;
 590                 }
 591
 592                 str = StreamOut(encoding);
 593
 594                 if ( !str.empty() )
 595                 {
 596                     // we have to manually extract the required part, luckily
 597                     // this is easy in this case as EOL characters in str are
 598                     // just LFs because we remove CRs in wxRichEditStreamOut
 599                     str = str.Mid(from, to - from);
 600                 }
 601             }
 602
 603             // StreamOut() wasn't used or failed, try to do it in normal way
 604             if ( str.empty() )
 605 #endif // !wxUSE_UNICODE
 606             {
 607                 // alloc one extra WORD as needed by the control
 608                 wxStringBuffer tmp(str, ++len);
 609                 wxChar *p = tmp;
 610
 611                 TEXTRANGE textRange;
 612                 textRange.chrg.cpMin = from;
 613                 textRange.chrg.cpMax = to;
 614                 textRange.lpstrText = p;
 615
 616                 (void)::SendMessage(GetHwnd(), EM_GETTEXTRANGE,
 617                                     0, (LPARAM)&textRange);
 618
 619                 if ( m_verRichEdit > 1 )
 620                 {
 621                     // RichEdit 2.0 uses just CR ('\r') for the
 622                     // newlines which is neither Unix nor Windows
 623                     // style - convert it to something reasonable
 624                     for ( ; *p; p++ )
 625                     {
 626                         if ( *p == _T('\r') )
 627                             *p = _T('\n');
 628                     }
 629                 }
 630             }
 631
 632             if ( m_verRichEdit == 1 )
 633             {
 634                 // convert to the canonical form - see comment below
 635                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 636             }
 637         }
 638         //else: no text at all, leave the string empty
 639     }
 640     else
 641 #endif // wxUSE_RICHEDIT
 642     {
 643         // retrieve all text
 644         str = wxGetWindowText(GetHWND());
 645
 646         // need only a range?
 647         if ( from < to )
 648         {
 649             str = str.Mid(from, to - from);
 650         }
 651
 652         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 653         // canonical one (same one as above) for consistency with the other kinds
 654         // of controls and, more importantly, with the other ports
 655         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 656     }
 657
 658     return str;
 659 }
 660
 661 void wxTextCtrl::SetValue(const wxString& value)
 662 {
 663     // if the text is long enough, it's faster to just set it instead of first
 664     // comparing it with the old one (chances are that it will be different
 665     // anyhow, this comparison is there to avoid flicker for small single-line
 666     // edit controls mostly)
 667     if ( (value.length() > 0x400) || (value != GetValue()) )
 668     {
 669         DoWriteText(value, false /* not selection only */);
 670
 671         // for compatibility, don't move the cursor when doing SetValue()
 672         SetInsertionPoint(0);
 673     }
 674     else // same text
 675     {
 676         // still send an event for consistency
 677         SendUpdateEvent();
 678     }
 679
 680     // we should reset the modified flag even if the value didn't really change
 681
 682     // mark the control as being not dirty - we changed its text, not the
 683     // user
 684     DiscardEdits();
 685 }
 686
 687 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 688
 689 // TODO: using memcpy() would improve performance a lot for big amounts of text
 690
 691 DWORD CALLBACK
 692 wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 693 {
 694     *pcb = 0;
 695
 696     const wchar_t ** const ppws = (const wchar_t **)dwCookie;
 697
 698     wchar_t *wbuf = (wchar_t *)buf;
 699     const wchar_t *wpc = *ppws;
 700     while ( cb && *wpc )
 701     {
 702         *wbuf++ = *wpc++;
 703
 704         cb -= sizeof(wchar_t);
 705         (*pcb) += sizeof(wchar_t);
 706     }
 707
 708     *ppws = wpc;
 709
 710     return 0;
 711 }
 712
 713 // helper struct used to pass parameters from wxTextCtrl to wxRichEditStreamOut
 714 struct wxStreamOutData
 715 {
 716     wchar_t *wpc;
 717     size_t len;
 718 };
 719
 720 DWORD CALLBACK
 721 wxRichEditStreamOut(DWORD_PTR dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 722 {
 723     *pcb = 0;
 724
 725     wxStreamOutData *data = (wxStreamOutData *)dwCookie;
 726
 727     const wchar_t *wbuf = (const wchar_t *)buf;
 728     wchar_t *wpc = data->wpc;
 729     while ( cb )
 730     {
 731         wchar_t wch = *wbuf++;
 732
 733         // turn "\r\n" into "\n" on the fly
 734         if ( wch != L'\r' )
 735             *wpc++ = wch;
 736         else
 737             data->len--;
 738
 739         cb -= sizeof(wchar_t);
 740         (*pcb) += sizeof(wchar_t);
 741     }
 742
 743     data->wpc = wpc;
 744
 745     return 0;
 746 }
 747
 748
 749 #if wxUSE_UNICODE_MSLU
 750     #define UNUSED_IF_MSLU(param)
 751 #else
 752     #define UNUSED_IF_MSLU(param) param
 753 #endif
 754
 755 bool
 756 wxTextCtrl::StreamIn(const wxString& value,
 757                      wxFontEncoding UNUSED_IF_MSLU(encoding),
 758                      bool selectionOnly)
 759 {
 760 #if wxUSE_UNICODE_MSLU
 761     const wchar_t *wpc = value.c_str();
 762 #else // !wxUSE_UNICODE_MSLU
 763     wxCSConv conv(encoding);
 764
 765     const size_t len = conv.MB2WC(NULL, value, value.length());
 766
 767 #if wxUSE_WCHAR_T
 768     wxWCharBuffer wchBuf(len);
 769     wchar_t *wpc = wchBuf.data();
 770 #else
 771     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 772     wchar_t *wpc = wchBuf;
 773 #endif
 774
 775     conv.MB2WC(wpc, value, value.length());
 776 #endif // wxUSE_UNICODE_MSLU
 777
 778     // finally, stream it in the control
 779     EDITSTREAM eds;
 780     wxZeroMemory(eds);
 781     eds.dwCookie = (DWORD)&wpc;
 782     // the cast below is needed for broken (very) old mingw32 headers
 783     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 784
 785     // same problem as in DoWriteText(): we can get multiple events here
 786     UpdatesCountFilter ucf(m_updatesCount);
 787
 788     ::SendMessage(GetHwnd(), EM_STREAMIN,
 789                   SF_TEXT |
 790                   SF_UNICODE |
 791                   (selectionOnly ? SFF_SELECTION : 0),
 792                   (LPARAM)&eds);
 793
 794     wxASSERT_MSG( ucf.GotUpdate(), _T("EM_STREAMIN didn't send EN_UPDATE?") );
 795
 796     if ( eds.dwError )
 797     {
 798         wxLogLastError(_T("EM_STREAMIN"));
 799     }
 800
 801 #if !wxUSE_WCHAR_T
 802     free(wchBuf);
 803 #endif // !wxUSE_WCHAR_T
 804
 805     return true;
 806 }
 807
 808 #if !wxUSE_UNICODE_MSLU
 809
 810 wxString
 811 wxTextCtrl::StreamOut(wxFontEncoding encoding, bool selectionOnly) const
 812 {
 813     wxString out;
 814
 815     const int len = GetWindowTextLength(GetHwnd());
 816
 817 #if wxUSE_WCHAR_T
 818     wxWCharBuffer wchBuf(len);
 819     wchar_t *wpc = wchBuf.data();
 820 #else
 821     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 822     wchar_t *wpc = wchBuf;
 823 #endif
 824
 825     wxStreamOutData data;
 826     data.wpc = wpc;
 827     data.len = len;
 828
 829     EDITSTREAM eds;
 830     wxZeroMemory(eds);
 831     eds.dwCookie = (DWORD)&data;
 832     eds.pfnCallback = wxRichEditStreamOut;
 833
 834     ::SendMessage
 835       (
 836         GetHwnd(),
 837         EM_STREAMOUT,
 838         SF_TEXT | SF_UNICODE | (selectionOnly ? SFF_SELECTION : 0),
 839         (LPARAM)&eds
 840       );
 841
 842     if ( eds.dwError )
 843     {
 844         wxLogLastError(_T("EM_STREAMOUT"));
 845     }
 846     else // streamed out ok
 847     {
 848         // NUL-terminate the string because its length could have been
 849         // decreased by wxRichEditStreamOut
 850         *(wchBuf.data() + data.len) = L'\0';
 851
 852         // now convert to the given encoding (this is a possibly lossful
 853         // conversion but what else can we do)
 854         wxCSConv conv(encoding);
 855         size_t lenNeeded = conv.WC2MB(NULL, wchBuf, 0);
 856         if ( lenNeeded++ )
 857         {
 858             conv.WC2MB(wxStringBuffer(out, lenNeeded), wchBuf, lenNeeded);
 859         }
 860     }
 861
 862 #if !wxUSE_WCHAR_T
 863     free(wchBuf);
 864 #endif // !wxUSE_WCHAR_T
 865
 866     return out;
 867 }
 868
 869 #endif // !wxUSE_UNICODE_MSLU
 870
 871 #endif // wxUSE_RICHEDIT
 872
 873 void wxTextCtrl::WriteText(const wxString& value)
 874 {
 875     DoWriteText(value);
 876 }
 877
 878 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 879 {
 880     wxString valueDos;
 881     if ( m_windowStyle & wxTE_MULTILINE )
 882         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 883     else
 884         valueDos = value;
 885
 886 #if wxUSE_RICHEDIT
 887     // there are several complications with the rich edit controls here
 888     bool done = false;
 889     if ( IsRich() )
 890     {
 891         // first, ensure that the new text will be in the default style
 892         if ( !m_defaultStyle.IsDefault() )
 893         {
 894             long start, end;
 895             GetSelection(&start, &end);
 896             SetStyle(start, end, m_defaultStyle);
 897         }
 898
 899 #if wxUSE_UNICODE_MSLU
 900         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 901         // but EM_STREAMIN works
 902         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 903         {
 904            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 905         }
 906 #endif // wxUSE_UNICODE_MSLU
 907
 908 #if !wxUSE_UNICODE
 909         // next check if the text we're inserting must be shown in a non
 910         // default charset -- this only works for RichEdit > 1.0
 911         if ( GetRichVersion() > 1 )
 912         {
 913             wxFont font = m_defaultStyle.GetFont();
 914             if ( !font.Ok() )
 915                 font = GetFont();
 916
 917             if ( font.Ok() )
 918             {
 919                wxFontEncoding encoding = font.GetEncoding();
 920                if ( encoding != wxFONTENCODING_SYSTEM )
 921                {
 922                    // we have to use EM_STREAMIN to force richedit control 2.0+
 923                    // to show any text in the non default charset -- otherwise
 924                    // it thinks it knows better than we do and always shows it
 925                    // in the default one
 926                    done = StreamIn(valueDos, encoding, selectionOnly);
 927                }
 928             }
 929         }
 930 #endif // !wxUSE_UNICODE
 931     }
 932
 933     if ( !done )
 934 #endif // wxUSE_RICHEDIT
 935     {
 936         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
 937         // call (this happens for plain EDITs with EM_REPLACESEL and under some
 938         // -- undetermined -- conditions with rich edit) and sometimes we don't
 939         // get any events at all (plain EDIT with WM_SETTEXT), so ensure that
 940         // we generate exactly one of them by ignoring all but the first one in
 941         // SendUpdateEvent() and generating one ourselves if we hadn't got any
 942         // notifications from Windows
 943         UpdatesCountFilter ucf(m_updatesCount);
 944
 945         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 946                       0, (LPARAM)valueDos.c_str());
 947
 948         if ( !ucf.GotUpdate() )
 949         {
 950             SendUpdateEvent();
 951         }
 952     }
 953 }
 954
 955 void wxTextCtrl::AppendText(const wxString& text)
 956 {
 957     SetInsertionPointEnd();
 958
 959     WriteText(text);
 960
 961 #if wxUSE_RICHEDIT
 962     // don't do this if we're frozen, saves some time
 963     if ( !IsFrozen() && IsMultiLine() && GetRichVersion() > 1 )
 964     {
 965         // setting the caret to the end and showing it simply doesn't work for
 966         // RichEdit 2.0 -- force it to still do what we want
 967         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
 968     }
 969 #endif // wxUSE_RICHEDIT
 970 }
 971
 972 void wxTextCtrl::Clear()
 973 {
 974     ::SetWindowText(GetHwnd(), wxEmptyString);
 975
 976 #if wxUSE_RICHEDIT
 977     if ( !IsRich() )
 978 #endif // wxUSE_RICHEDIT
 979     {
 980         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 981         // but the normal ones don't -- make Clear() behaviour consistent by
 982         // always sending this event
 983
 984         // Windows already sends an update event for single-line
 985         // controls.
 986         if ( m_windowStyle & wxTE_MULTILINE )
 987             SendUpdateEvent();
 988     }
 989 }
 990
 991 #ifdef __WIN32__
 992
 993 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 994 {
 995     SetFocus();
 996
 997     size_t lenOld = GetValue().length();
 998
 999     wxUint32 code = event.GetRawKeyCode();
1000     ::keybd_event((BYTE)code, 0, 0 /* key press */, 0);
1001     ::keybd_event((BYTE)code, 0, KEYEVENTF_KEYUP, 0);
1002
1003     // assume that any alphanumeric key changes the total number of characters
1004     // in the control - this should work in 99% of cases
1005     return GetValue().length() != lenOld;
1006 }
1007
1008 #endif // __WIN32__
1009
1010 // ----------------------------------------------------------------------------
1011 // Clipboard operations
1012 // ----------------------------------------------------------------------------
1013
1014 void wxTextCtrl::Copy()
1015 {
1016     if (CanCopy())
1017     {
1018         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
1019     }
1020 }
1021
1022 void wxTextCtrl::Cut()
1023 {
1024     if (CanCut())
1025     {
1026         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
1027     }
1028 }
1029
1030 void wxTextCtrl::Paste()
1031 {
1032     if (CanPaste())
1033     {
1034         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
1035     }
1036 }
1037
1038 bool wxTextCtrl::HasSelection() const
1039 {
1040     long from, to;
1041     GetSelection(&from, &to);
1042     return from != to;
1043 }
1044
1045 bool wxTextCtrl::CanCopy() const
1046 {
1047     // Can copy if there's a selection
1048     return HasSelection();
1049 }
1050
1051 bool wxTextCtrl::CanCut() const
1052 {
1053     return CanCopy() && IsEditable();
1054 }
1055
1056 bool wxTextCtrl::CanPaste() const
1057 {
1058     if ( !IsEditable() )
1059         return false;
1060
1061 #if wxUSE_RICHEDIT
1062     if ( IsRich() )
1063     {
1064         UINT cf = 0; // 0 == any format
1065
1066         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
1067     }
1068 #endif // wxUSE_RICHEDIT
1069
1070     // Standard edit control: check for straight text on clipboard
1071     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
1072         return false;
1073
1074     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
1075     ::CloseClipboard();
1076
1077     return isTextAvailable;
1078 }
1079
1080 // ----------------------------------------------------------------------------
1081 // Accessors
1082 // ----------------------------------------------------------------------------
1083
1084 void wxTextCtrl::SetEditable(bool editable)
1085 {
1086     HWND hWnd = GetHwnd();
1087     ::SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
1088 }
1089
1090 void wxTextCtrl::SetInsertionPoint(long pos)
1091 {
1092     DoSetSelection(pos, pos);
1093
1094     m_isCaretAtEnd = pos == GetLastPosition();
1095 }
1096
1097 void wxTextCtrl::SetInsertionPointEnd()
1098 {
1099     // we must not do anything if the caret is already there because calling
1100     // SetInsertionPoint() thaws the controls if Freeze() had been called even
1101     // if it doesn't actually move the caret anywhere and so the simple fact of
1102     // doing it results in horrible flicker when appending big amounts of text
1103     // to the control in a few chunks (see DoAddText() test in the text sample)
1104     if ( m_isCaretAtEnd || GetInsertionPoint() == GetLastPosition() )
1105     {
1106         m_isCaretAtEnd = true;
1107         return;
1108     }
1109
1110     long pos;
1111
1112 #if wxUSE_RICHEDIT
1113     if ( m_verRichEdit == 1 )
1114     {
1115         // we don't have to waste time calling GetLastPosition() in this case
1116         pos = -1;
1117     }
1118     else // !RichEdit 1.0
1119 #endif // wxUSE_RICHEDIT
1120     {
1121         pos = GetLastPosition();
1122     }
1123
1124     SetInsertionPoint(pos);
1125 }
1126
1127 long wxTextCtrl::GetInsertionPoint() const
1128 {
1129 #if wxUSE_RICHEDIT
1130     if ( IsRich() )
1131     {
1132         CHARRANGE range;
1133         range.cpMin = 0;
1134         range.cpMax = 0;
1135         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
1136         return range.cpMin;
1137     }
1138 #endif // wxUSE_RICHEDIT
1139
1140     DWORD Pos = (DWORD)::SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
1141     return Pos & 0xFFFF;
1142 }
1143
1144 wxTextPos wxTextCtrl::GetLastPosition() const
1145 {
1146     int numLines = GetNumberOfLines();
1147     long posStartLastLine = XYToPosition(0, numLines - 1);
1148
1149     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
1150
1151     return posStartLastLine + lenLastLine;
1152 }
1153
1154 // If the return values from and to are the same, there is no
1155 // selection.
1156 void wxTextCtrl::GetSelection(long* from, long* to) const
1157 {
1158 #if wxUSE_RICHEDIT
1159     if ( IsRich() )
1160     {
1161         CHARRANGE charRange;
1162         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
1163
1164         *from = charRange.cpMin;
1165         *to = charRange.cpMax;
1166     }
1167     else
1168 #endif // !wxUSE_RICHEDIT
1169     {
1170         DWORD dwStart, dwEnd;
1171         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
1172
1173         *from = dwStart;
1174         *to = dwEnd;
1175     }
1176 }
1177
1178 bool wxTextCtrl::IsEditable() const
1179 {
1180     // strangely enough, we may be called before the control is created: our
1181     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
1182     // us
1183     if ( !m_hWnd )
1184         return true;
1185
1186     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1187
1188     return (style & ES_READONLY) == 0;
1189 }
1190
1191 // ----------------------------------------------------------------------------
1192 // selection
1193 // ----------------------------------------------------------------------------
1194
1195 void wxTextCtrl::SetSelection(long from, long to)
1196 {
1197     // if from and to are both -1, it means (in wxWidgets) that all text should
1198     // be selected - translate into Windows convention
1199     if ( (from == -1) && (to == -1) )
1200     {
1201         from = 0;
1202         to = -1;
1203     }
1204
1205     DoSetSelection(from, to);
1206 }
1207
1208 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
1209 {
1210     HWND hWnd = GetHwnd();
1211
1212 #if wxUSE_RICHEDIT
1213     if ( IsRich() )
1214     {
1215         CHARRANGE range;
1216         range.cpMin = from;
1217         range.cpMax = to;
1218         ::SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
1219     }
1220     else
1221 #endif // wxUSE_RICHEDIT
1222     {
1223         ::SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
1224     }
1225
1226     if ( scrollCaret && !IsFrozen() )
1227     {
1228 #if wxUSE_RICHEDIT
1229         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1230         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1231         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1232         // option is set (but it does work ok in richedit 1.0 mode...)
1233         //
1234         // so to make it work we either need to give focus to it here which
1235         // will probably create many problems (dummy focus events; window
1236         // containing the text control being brought to foreground
1237         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1238         // create other problems too -- and in fact it does because if we turn
1239         // on/off this style while appending the text to the control, the
1240         // vertical scrollbar never appears in it even if we append tons of
1241         // text and to work around this the only solution I found was to use
1242         // ES_DISABLENOSCROLL
1243         //
1244         // this is very ugly but I don't see any other way to make this work
1245         if ( GetRichVersion() > 1 )
1246         {
1247             if ( !HasFlag(wxTE_NOHIDESEL) )
1248             {
1249                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1250                               ECOOP_OR, ECO_NOHIDESEL);
1251             }
1252             //else: everything is already ok
1253         }
1254 #endif // wxUSE_RICHEDIT
1255
1256         ::SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1257
1258 #if wxUSE_RICHEDIT
1259         // restore ECO_NOHIDESEL if we changed it
1260         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1261         {
1262             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1263                           ECOOP_AND, ~ECO_NOHIDESEL);
1264         }
1265 #endif // wxUSE_RICHEDIT
1266     }
1267 }
1268
1269 // ----------------------------------------------------------------------------
1270 // Working with files
1271 // ----------------------------------------------------------------------------
1272
1273 bool wxTextCtrl::LoadFile(const wxString& file)
1274 {
1275     if ( wxTextCtrlBase::LoadFile(file) )
1276     {
1277         // update the size limit if needed
1278         AdjustSpaceLimit();
1279
1280         return true;
1281     }
1282
1283     return false;
1284 }
1285
1286 // ----------------------------------------------------------------------------
1287 // Editing
1288 // ----------------------------------------------------------------------------
1289
1290 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1291 {
1292     // Set selection and remove it
1293     DoSetSelection(from, to, false /* don't scroll caret into view */);
1294
1295     DoWriteText(value, true /* selection only */);
1296 }
1297
1298 void wxTextCtrl::Remove(long from, long to)
1299 {
1300     Replace(from, to, wxEmptyString);
1301 }
1302
1303 bool wxTextCtrl::IsModified() const
1304 {
1305     return ::SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1306 }
1307
1308 void wxTextCtrl::MarkDirty()
1309 {
1310     ::SendMessage(GetHwnd(), EM_SETMODIFY, TRUE, 0L);
1311 }
1312
1313 void wxTextCtrl::DiscardEdits()
1314 {
1315     ::SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1316 }
1317
1318 int wxTextCtrl::GetNumberOfLines() const
1319 {
1320     return (int)::SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1321 }
1322
1323 // ----------------------------------------------------------------------------
1324 // Positions <-> coords
1325 // ----------------------------------------------------------------------------
1326
1327 long wxTextCtrl::XYToPosition(long x, long y) const
1328 {
1329     // This gets the char index for the _beginning_ of this line
1330     long charIndex = ::SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1331
1332     return charIndex + x;
1333 }
1334
1335 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1336 {
1337     HWND hWnd = GetHwnd();
1338
1339     // This gets the line number containing the character
1340     long lineNo;
1341 #if wxUSE_RICHEDIT
1342     if ( IsRich() )
1343     {
1344         lineNo = ::SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1345     }
1346     else
1347 #endif // wxUSE_RICHEDIT
1348     {
1349         lineNo = ::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1350     }
1351
1352     if ( lineNo == -1 )
1353     {
1354         // no such line
1355         return false;
1356     }
1357
1358     // This gets the char index for the _beginning_ of this line
1359     long charIndex = ::SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1360     if ( charIndex == -1 )
1361     {
1362         return false;
1363     }
1364
1365     // The X position must therefore be the different between pos and charIndex
1366     if ( x )
1367         *x = pos - charIndex;
1368     if ( y )
1369         *y = lineNo;
1370
1371     return true;
1372 }
1373
1374 wxTextCtrlHitTestResult
1375 wxTextCtrl::HitTest(const wxPoint& pt, long *posOut) const
1376 {
1377     // first get the position from Windows
1378     LPARAM lParam;
1379
1380 #if wxUSE_RICHEDIT
1381     POINTL ptl;
1382     if ( IsRich() )
1383     {
1384         // for rich edit controls the position is passed iva the struct fields
1385         ptl.x = pt.x;
1386         ptl.y = pt.y;
1387         lParam = (LPARAM)&ptl;
1388     }
1389     else
1390 #endif // wxUSE_RICHEDIT
1391     {
1392         // for the plain ones, we are limited to 16 bit positions which are
1393         // combined in a single 32 bit value
1394         lParam = MAKELPARAM(pt.x, pt.y);
1395     }
1396
1397     LRESULT pos = ::SendMessage(GetHwnd(), EM_CHARFROMPOS, 0, lParam);
1398
1399     if ( pos == -1 )
1400     {
1401         // this seems to indicate an error...
1402         return wxTE_HT_UNKNOWN;
1403     }
1404
1405 #if wxUSE_RICHEDIT
1406     if ( !IsRich() )
1407 #endif // wxUSE_RICHEDIT
1408     {
1409         // for plain EDIT controls the higher word contains something else
1410         pos = LOWORD(pos);
1411     }
1412
1413
1414     // next determine where it is relatively to our point: EM_CHARFROMPOS
1415     // always returns the closest character but we need to be more precise, so
1416     // double check that we really are where it pretends
1417     POINTL ptReal;
1418
1419 #if wxUSE_RICHEDIT
1420     // FIXME: we need to distinguish between richedit 2 and 3 here somehow but
1421     //        we don't know how to do it
1422     if ( IsRich() )
1423     {
1424         ::SendMessage(GetHwnd(), EM_POSFROMCHAR, (WPARAM)&ptReal, pos);
1425     }
1426     else
1427 #endif // wxUSE_RICHEDIT
1428     {
1429         LRESULT lRc = ::SendMessage(GetHwnd(), EM_POSFROMCHAR, pos, 0);
1430
1431         if ( lRc == -1 )
1432         {
1433             // this is apparently returned when pos corresponds to the last
1434             // position
1435             ptReal.x =
1436             ptReal.y = 0;
1437         }
1438         else
1439         {
1440             ptReal.x = LOWORD(lRc);
1441             ptReal.y = HIWORD(lRc);
1442         }
1443     }
1444
1445     wxTextCtrlHitTestResult rc;
1446
1447     if ( pt.y > ptReal.y + GetCharHeight() )
1448         rc = wxTE_HT_BELOW;
1449     else if ( pt.x > ptReal.x + GetCharWidth() )
1450         rc = wxTE_HT_BEYOND;
1451     else
1452         rc = wxTE_HT_ON_TEXT;
1453
1454     if ( posOut )
1455         *posOut = pos;
1456
1457     return rc;
1458 }
1459
1460 // ----------------------------------------------------------------------------
1461 //
1462 // ----------------------------------------------------------------------------
1463
1464 void wxTextCtrl::ShowPosition(long pos)
1465 {
1466     HWND hWnd = GetHwnd();
1467
1468     // To scroll to a position, we pass the number of lines and characters
1469     // to scroll *by*. This means that we need to:
1470     // (1) Find the line position of the current line.
1471     // (2) Find the line position of pos.
1472     // (3) Scroll by (pos - current).
1473     // For now, ignore the horizontal scrolling.
1474
1475     // Is this where scrolling is relative to - the line containing the caret?
1476     // Or is the first visible line??? Try first visible line.
1477 //    int currentLineLineNo1 = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1478
1479     int currentLineLineNo = (int)::SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1480
1481     int specifiedLineLineNo = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1482
1483     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1484
1485     if (linesToScroll != 0)
1486       (void)::SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1487
1488     // be pessimistic
1489     m_isCaretAtEnd = false;
1490 }
1491
1492 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1493 {
1494     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1495 }
1496
1497 int wxTextCtrl::GetLineLength(long lineNo) const
1498 {
1499     long pos = XYToPosition(0, lineNo);
1500
1501     return GetLengthOfLineContainingPos(pos);
1502 }
1503
1504 wxString wxTextCtrl::GetLineText(long lineNo) const
1505 {
1506     size_t len = (size_t)GetLineLength(lineNo) + 1;
1507
1508     // there must be at least enough place for the length WORD in the
1509     // buffer
1510     len += sizeof(WORD);
1511
1512     wxString str;
1513     {
1514         wxStringBufferLength tmp(str, len);
1515         wxChar *buf = tmp;
1516
1517         *(WORD *)buf = (WORD)len;
1518         len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1519
1520 #if wxUSE_RICHEDIT
1521         if ( IsRich() )
1522         {
1523             // remove the '\r' returned by the rich edit control, the user code
1524             // should never see it
1525             if ( buf[len - 2] == _T('\r') && buf[len - 1] == _T('\n') )
1526             {
1527                 buf[len - 2] = _T('\n');
1528                 len--;
1529             }
1530         }
1531 #endif // wxUSE_RICHEDIT
1532
1533         // remove the '\n' at the end, if any (this is how this function is
1534         // supposed to work according to the docs)
1535         if ( buf[len - 1] == _T('\n') )
1536         {
1537             len--;
1538         }
1539
1540         buf[len] = 0;
1541         tmp.SetLength(len);
1542     }
1543
1544     return str;
1545 }
1546
1547 void wxTextCtrl::SetMaxLength(unsigned long len)
1548 {
1549 #if wxUSE_RICHEDIT
1550     if (IsRich())
1551         ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, (LPARAM) (DWORD) len);
1552     else
1553 #endif
1554     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1555 }
1556
1557 // ----------------------------------------------------------------------------
1558 // Undo/redo
1559 // ----------------------------------------------------------------------------
1560
1561 void wxTextCtrl::Undo()
1562 {
1563     if (CanUndo())
1564     {
1565         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1566
1567         // it's not necessarily at the end any more
1568         m_isCaretAtEnd = false;
1569     }
1570 }
1571
1572 void wxTextCtrl::Redo()
1573 {
1574     if (CanRedo())
1575     {
1576 #if wxUSE_RICHEDIT
1577         if (GetRichVersion() > 1)
1578             ::SendMessage(GetHwnd(), EM_REDO, 0, 0);
1579         else
1580 #endif
1581         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1582         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1583
1584         // it's not necessarily at the end any more
1585         m_isCaretAtEnd = false;
1586     }
1587 }
1588
1589 bool wxTextCtrl::CanUndo() const
1590 {
1591     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1592 }
1593
1594 bool wxTextCtrl::CanRedo() const
1595 {
1596 #if wxUSE_RICHEDIT
1597     if (GetRichVersion() > 1)
1598         return ::SendMessage(GetHwnd(), EM_CANREDO, 0, 0) != 0;
1599     else
1600 #endif
1601     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1602 }
1603
1604 // ----------------------------------------------------------------------------
1605 // caret handling (Windows only)
1606 // ----------------------------------------------------------------------------
1607
1608 bool wxTextCtrl::ShowNativeCaret(bool show)
1609 {
1610     if ( show != m_isNativeCaretShown )
1611     {
1612         if ( !(show ? ::ShowCaret(GetHwnd()) : ::HideCaret(GetHwnd())) )
1613         {
1614             // not an error, may simply indicate that it's not shown/hidden
1615             // yet (i.e. it had been hidden/showh 2 times before)
1616             return false;
1617         }
1618
1619         m_isNativeCaretShown = show;
1620     }
1621
1622     return true;
1623 }
1624
1625 // ----------------------------------------------------------------------------
1626 // implemenation details
1627 // ----------------------------------------------------------------------------
1628
1629 void wxTextCtrl::Command(wxCommandEvent & event)
1630 {
1631     SetValue(event.GetString());
1632     ProcessCommand (event);
1633 }
1634
1635 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1636 {
1637     // By default, load the first file into the text window.
1638     if (event.GetNumberOfFiles() > 0)
1639     {
1640         LoadFile(event.GetFiles()[0]);
1641     }
1642 }
1643
1644 // ----------------------------------------------------------------------------
1645 // kbd input processing
1646 // ----------------------------------------------------------------------------
1647
1648 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1649 {
1650     MSG *msg = (MSG *)pMsg;
1651
1652     // check for our special keys here: if we don't do it and the parent frame
1653     // uses them as accelerators, they wouldn't work at all, so we disable
1654     // usual preprocessing for them
1655     if ( msg->message == WM_KEYDOWN )
1656     {
1657         WORD vkey = (WORD) msg->wParam;
1658         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1659         {
1660             if ( vkey == VK_BACK )
1661                 return false;
1662         }
1663         else // no Alt
1664         {
1665             // we want to process some Ctrl-foo and Shift-bar but no key
1666             // combinations without either Ctrl or Shift nor with both of them
1667             // pressed
1668             const int ctrl = wxIsCtrlDown(),
1669                       shift = wxIsShiftDown();
1670             switch ( ctrl + shift )
1671             {
1672                 default:
1673                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1674                     // fall through
1675
1676                 case 0:
1677                 case 2:
1678                     break;
1679
1680                 case 1:
1681                     // either Ctrl or Shift pressed
1682                     if ( ctrl )
1683                     {
1684                         switch ( vkey )
1685                         {
1686                             case 'C':
1687                             case 'V':
1688                             case 'X':
1689                             case VK_INSERT:
1690                             case VK_DELETE:
1691                             case VK_HOME:
1692                             case VK_END:
1693                                 return false;
1694                         }
1695                     }
1696                     else // Shift is pressed
1697                     {
1698                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1699                             return false;
1700                     }
1701             }
1702         }
1703     }
1704
1705     return wxControl::MSWShouldPreProcessMessage(pMsg);
1706 }
1707
1708 void wxTextCtrl::OnChar(wxKeyEvent& event)
1709 {
1710     switch ( event.GetKeyCode() )
1711     {
1712         case WXK_RETURN:
1713             if ( !HasFlag(wxTE_MULTILINE) )
1714             {
1715                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1716                 InitCommandEvent(event);
1717                 event.SetString(GetValue());
1718                 if ( GetEventHandler()->ProcessEvent(event) )
1719                     return;
1720             }
1721             //else: multiline controls need Enter for themselves
1722
1723             break;
1724
1725         case WXK_TAB:
1726             // ok, so this is getting absolutely ridiculous but I don't see
1727             // any other way to fix this bug: when a multiline text control is
1728             // inside a wxFrame, we need to generate the navigation event as
1729             // otherwise nothing happens at all, but when the same control is
1730             // created inside a dialog, IsDialogMessage() *does* switch focus
1731             // all by itself and so if we do it here as well, it is advanced
1732             // twice and goes to the next control... to prevent this from
1733             // happening we're doing this ugly check, the logic being that if
1734             // we don't have focus then it had been already changed to the next
1735             // control
1736             //
1737             // the right thing to do would, of course, be to understand what
1738             // the hell is IsDialogMessage() doing but this is beyond my feeble
1739             // forces at the moment unfortunately
1740             if ( !(m_windowStyle & wxTE_PROCESS_TAB))
1741             {
1742                 if ( FindFocus() == this )
1743                 {
1744                     int flags = 0;
1745                     if (!event.ShiftDown())
1746                         flags |= wxNavigationKeyEvent::IsForward ;
1747                     if (event.ControlDown())
1748                         flags |= wxNavigationKeyEvent::WinChange ;
1749                     if (Navigate(flags))
1750                         return;
1751                 }
1752             }
1753             else
1754             {
1755                 // Insert tab since calling the default Windows handler
1756                 // doesn't seem to do it
1757                 WriteText(wxT("\t"));
1758             }
1759             break;
1760     }
1761
1762     // no, we didn't process it
1763     event.Skip();
1764 }
1765
1766 WXLRESULT wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1767 {
1768     WXLRESULT lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1769
1770     if ( nMsg == WM_GETDLGCODE )
1771     {
1772         // we always want the chars and the arrows: the arrows for navigation
1773         // and the chars because we want Ctrl-C to work even in a read only
1774         // control
1775         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1776
1777         if ( IsEditable() )
1778         {
1779             // we may have several different cases:
1780             // 1. normal case: both TAB and ENTER are used for dlg navigation
1781             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1782             //    next control in the dialog
1783             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1784             //    navigation
1785             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1786             //    to the next control
1787
1788             // the multiline edit control should always get <Return> for itself
1789             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1790                 lDlgCode |= DLGC_WANTMESSAGE;
1791
1792             if ( HasFlag(wxTE_PROCESS_TAB) )
1793                 lDlgCode |= DLGC_WANTTAB;
1794
1795             lRc |= lDlgCode;
1796         }
1797         else // !editable
1798         {
1799             // NB: use "=", not "|=" as the base class version returns the
1800             //     same flags is this state as usual (i.e. including
1801             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1802             //     native Win32 apps?) but for now live with it.
1803             lRc = lDlgCode;
1804         }
1805     }
1806
1807     return lRc;
1808 }
1809
1810 // ----------------------------------------------------------------------------
1811 // text control event processing
1812 // ----------------------------------------------------------------------------
1813
1814 bool wxTextCtrl::SendUpdateEvent()
1815 {
1816     switch ( m_updatesCount )
1817     {
1818         case 0:
1819             // remember that we've got an update
1820             m_updatesCount++;
1821             break;
1822
1823         case 1:
1824             // we had already sent one event since the last control modification
1825             return false;
1826
1827         default:
1828             wxFAIL_MSG( _T("unexpected wxTextCtrl::m_updatesCount value") );
1829             // fall through
1830
1831         case -1:
1832             // we hadn't updated the control ourselves, this event comes from
1833             // the user, don't need to ignore it nor update the count
1834             break;
1835     }
1836
1837     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1838     InitCommandEvent(event);
1839
1840     return ProcessCommand(event);
1841 }
1842
1843 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1844 {
1845     switch ( param )
1846     {
1847         case EN_SETFOCUS:
1848         case EN_KILLFOCUS:
1849             {
1850                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1851                                                          : wxEVT_SET_FOCUS,
1852                                    m_windowId);
1853                 event.SetEventObject(this);
1854                 GetEventHandler()->ProcessEvent(event);
1855             }
1856             break;
1857
1858         case EN_CHANGE:
1859             SendUpdateEvent();
1860             break;
1861
1862         case EN_MAXTEXT:
1863             // the text size limit has been hit -- try to increase it
1864             if ( !AdjustSpaceLimit() )
1865             {
1866                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1867                 InitCommandEvent(event);
1868                 event.SetString(GetValue());
1869                 ProcessCommand(event);
1870             }
1871             break;
1872
1873             // the other edit notification messages are not processed
1874         default:
1875             return false;
1876     }
1877
1878     // processed
1879     return true;
1880 }
1881
1882 WXHBRUSH wxTextCtrl::MSWControlColor(WXHDC hDC)
1883 {
1884     if ( !IsEnabled() && !HasFlag(wxTE_MULTILINE) )
1885         return MSWControlColorDisabled(hDC);
1886
1887     return wxTextCtrlBase::MSWControlColorSolid(hDC);
1888 }
1889
1890 bool wxTextCtrl::AdjustSpaceLimit()
1891 {
1892     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1893
1894     // HACK: we try to automatically extend the limit for the amount of text
1895     //       to allow (interactively) entering more than 64Kb of text under
1896     //       Win9x but we shouldn't reset the text limit which was previously
1897     //       set explicitly with SetMaxLength()
1898     //
1899     //       we could solve this by storing the limit we set in wxTextCtrl but
1900     //       to save space we prefer to simply test here the actual limit
1901     //       value: we consider that SetMaxLength() can only be called for
1902     //       values < 32Kb
1903     if ( limit < 0x8000 )
1904     {
1905         // we've got more text than limit set by SetMaxLength()
1906         return false;
1907     }
1908
1909     unsigned int len = ::GetWindowTextLength(GetHwnd());
1910     if ( len >= limit )
1911     {
1912         limit = len + 0x8000;    // 32Kb
1913
1914 #if wxUSE_RICHEDIT
1915         if ( IsRich() )
1916         {
1917             // as a nice side effect, this also allows passing limit > 64Kb
1918             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1919         }
1920         else
1921 #endif // wxUSE_RICHEDIT
1922         {
1923             if ( limit > 0xffff )
1924             {
1925                 // this will set it to a platform-dependent maximum (much more
1926                 // than 64Kb under NT)
1927                 limit = 0;
1928             }
1929
1930             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1931         }
1932     }
1933
1934     // we changed the limit
1935     return true;
1936 }
1937
1938 bool wxTextCtrl::AcceptsFocus() const
1939 {
1940     // we don't want focus if we can't be edited unless we're a multiline
1941     // control because then it might be still nice to get focus from keyboard
1942     // to be able to scroll it without mouse
1943     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1944 }
1945
1946 wxSize wxTextCtrl::DoGetBestSize() const
1947 {
1948     int cx, cy;
1949     wxGetCharSize(GetHWND(), &cx, &cy, GetFont());
1950
1951     int wText = DEFAULT_ITEM_WIDTH;
1952
1953     int hText = cy;
1954     if ( m_windowStyle & wxTE_MULTILINE )
1955     {
1956         hText *= wxMax(GetNumberOfLines(), 5);
1957     }
1958     //else: for single line control everything is ok
1959
1960     // we have to add the adjustments for the control height only once, not
1961     // once per line, so do it after multiplication above
1962     hText += EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy) - cy;
1963
1964     return wxSize(wText, hText);
1965 }
1966
1967 // ----------------------------------------------------------------------------
1968 // standard handlers for standard edit menu events
1969 // ----------------------------------------------------------------------------
1970
1971 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1972 {
1973     Cut();
1974 }
1975
1976 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1977 {
1978     Copy();
1979 }
1980
1981 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1982 {
1983     Paste();
1984 }
1985
1986 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1987 {
1988     Undo();
1989 }
1990
1991 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1992 {
1993     Redo();
1994 }
1995
1996 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
1997 {
1998     long from, to;
1999     GetSelection(& from, & to);
2000     if (from != -1 && to != -1)
2001         Remove(from, to);
2002 }
2003
2004 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2005 {
2006     SetSelection(-1, -1);
2007 }
2008
2009 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2010 {
2011     event.Enable( CanCut() );
2012 }
2013
2014 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2015 {
2016     event.Enable( CanCopy() );
2017 }
2018
2019 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2020 {
2021     event.Enable( CanPaste() );
2022 }
2023
2024 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2025 {
2026     event.Enable( CanUndo() );
2027 }
2028
2029 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2030 {
2031     event.Enable( CanRedo() );
2032 }
2033
2034 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
2035 {
2036     long from, to;
2037     GetSelection(& from, & to);
2038     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
2039 }
2040
2041 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2042 {
2043     event.Enable(GetLastPosition() > 0);
2044 }
2045
2046 void wxTextCtrl::OnRightClick(wxMouseEvent& event)
2047 {
2048 #if wxUSE_RICHEDIT
2049     if (IsRich())
2050     {
2051         if (!m_privateContextMenu)
2052         {
2053             m_privateContextMenu = new wxMenu;
2054             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
2055             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
2056             m_privateContextMenu->AppendSeparator();
2057             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
2058             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
2059             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
2060             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
2061             m_privateContextMenu->AppendSeparator();
2062             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
2063         }
2064         PopupMenu(m_privateContextMenu, event.GetPosition());
2065         return;
2066     }
2067     else
2068 #endif
2069     event.Skip();
2070 }
2071
2072 void wxTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
2073 {
2074     // be sure the caret remains invisible if the user had hidden it
2075     if ( !m_isNativeCaretShown )
2076     {
2077         ::HideCaret(GetHwnd());
2078     }
2079 }
2080
2081 // ----------------------------------------------------------------------------
2082 // Default colors for MSW text control
2083 //
2084 // Set default background color to the native white instead of
2085 // the default wxSYS_COLOUR_BTNFACE (is triggered with wxNullColour).
2086 // ----------------------------------------------------------------------------
2087
2088 wxVisualAttributes wxTextCtrl::GetDefaultAttributes() const
2089 {
2090     wxVisualAttributes attrs;
2091     attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
2092     attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
2093     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW); //white
2094
2095     return attrs;
2096 }
2097
2098 // the rest of the file only deals with the rich edit controls
2099 #if wxUSE_RICHEDIT
2100
2101 // ----------------------------------------------------------------------------
2102 // EN_LINK processing
2103 // ----------------------------------------------------------------------------
2104
2105 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
2106 {
2107     NMHDR *hdr = (NMHDR* )lParam;
2108     switch ( hdr->code )
2109     {
2110        case EN_MSGFILTER:
2111             {
2112                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
2113                 UINT msg = msgf->msg;
2114
2115                 // this is a bit crazy but richedit 1.0 sends us all mouse
2116                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
2117                 // generate the wxWin events for this message manually
2118                 //
2119                 // NB: in fact, this is still not totally correct as it does
2120                 //     send us WM_LBUTTONUP if the selection was cleared by the
2121                 //     last click -- so currently we get 2 events in this case,
2122                 //     but as I don't see any obvious way to check for this I
2123                 //     leave this code in place because it's still better than
2124                 //     not getting left up events at all
2125                 if ( msg == WM_LBUTTONUP )
2126                 {
2127                     WXUINT flags = msgf->wParam;
2128                     int x = GET_X_LPARAM(msgf->lParam),
2129                         y = GET_Y_LPARAM(msgf->lParam);
2130
2131                     HandleMouseEvent(msg, x, y, flags);
2132                 }
2133             }
2134
2135             // return true to process the event (and false to ignore it)
2136             return true;
2137
2138         case EN_LINK:
2139             {
2140                 const ENLINK *enlink = (ENLINK *)hdr;
2141
2142                 switch ( enlink->msg )
2143                 {
2144                     case WM_SETCURSOR:
2145                         // ok, so it is hardcoded - do we really nee to
2146                         // customize it?
2147                         {
2148                             wxCursor cur(wxCURSOR_HAND);
2149                             ::SetCursor(GetHcursorOf(cur));
2150                             *result = TRUE;
2151                             break;
2152                         }
2153
2154                     case WM_MOUSEMOVE:
2155                     case WM_LBUTTONDOWN:
2156                     case WM_LBUTTONUP:
2157                     case WM_LBUTTONDBLCLK:
2158                     case WM_RBUTTONDOWN:
2159                     case WM_RBUTTONUP:
2160                     case WM_RBUTTONDBLCLK:
2161                         // send a mouse event
2162                         {
2163                             static const wxEventType eventsMouse[] =
2164                             {
2165                                 wxEVT_MOTION,
2166                                 wxEVT_LEFT_DOWN,
2167                                 wxEVT_LEFT_UP,
2168                                 wxEVT_LEFT_DCLICK,
2169                                 wxEVT_RIGHT_DOWN,
2170                                 wxEVT_RIGHT_UP,
2171                                 wxEVT_RIGHT_DCLICK,
2172                             };
2173
2174                             // the event ids are consecutive
2175                             wxMouseEvent
2176                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
2177
2178                             InitMouseEvent(evtMouse,
2179                                            GET_X_LPARAM(enlink->lParam),
2180                                            GET_Y_LPARAM(enlink->lParam),
2181                                            enlink->wParam);
2182
2183                             wxTextUrlEvent event(m_windowId, evtMouse,
2184                                                  enlink->chrg.cpMin,
2185                                                  enlink->chrg.cpMax);
2186
2187                             InitCommandEvent(event);
2188
2189                             *result = ProcessCommand(event);
2190                         }
2191                         break;
2192                 }
2193             }
2194             return true;
2195     }
2196
2197     // not processed, leave it to the base class
2198     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
2199 }
2200
2201 // ----------------------------------------------------------------------------
2202 // colour setting for the rich edit controls
2203 // ----------------------------------------------------------------------------
2204
2205 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
2206 {
2207     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
2208     {
2209         // colour didn't really change
2210         return false;
2211     }
2212
2213     if ( IsRich() )
2214     {
2215         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
2216         // EM_SETBKGNDCOLOR additionally
2217         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
2218     }
2219
2220     return true;
2221 }
2222
2223 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
2224 {
2225     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
2226     {
2227         // colour didn't really change
2228         return false;
2229     }
2230
2231     if ( IsRich() )
2232     {
2233         // change the colour of everything
2234         CHARFORMAT cf;
2235         wxZeroMemory(cf);
2236         cf.cbSize = sizeof(cf);
2237         cf.dwMask = CFM_COLOR;
2238         cf.crTextColor = wxColourToRGB(colour);
2239         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
2240     }
2241
2242     return true;
2243 }
2244
2245 // ----------------------------------------------------------------------------
2246 // styling support for rich edit controls
2247 // ----------------------------------------------------------------------------
2248
2249 #if wxUSE_RICHEDIT
2250
2251 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2252 {
2253     if ( !IsRich() )
2254     {
2255         // can't do it with normal text control
2256         return false;
2257     }
2258
2259     // the richedit 1.0 doesn't handle setting background colour, so don't
2260     // even try to do anything if it's the only thing we want to change
2261     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
2262         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
2263         !style.HasTabs() )
2264     {
2265         // nothing to do: return true if there was really nothing to do and
2266         // false if we failed to set bg colour
2267         return !style.HasBackgroundColour();
2268     }
2269
2270     // order the range if needed
2271     if ( start > end )
2272     {
2273         long tmp = start;
2274         start = end;
2275         end = tmp;
2276     }
2277
2278     // we can only change the format of the selection, so select the range we
2279     // want and restore the old selection later
2280     long startOld, endOld;
2281     GetSelection(&startOld, &endOld);
2282
2283     // but do we really have to change the selection?
2284     bool changeSel = start != startOld || end != endOld;
2285
2286     if ( changeSel )
2287     {
2288         DoSetSelection(start, end, false /* don't scroll caret into view */);
2289     }
2290
2291     // initialize CHARFORMAT struct
2292 #if wxUSE_RICHEDIT2
2293     CHARFORMAT2 cf;
2294 #else
2295     CHARFORMAT cf;
2296 #endif
2297
2298     wxZeroMemory(cf);
2299
2300     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2301     // CHARFORMAT in that case
2302 #if wxUSE_RICHEDIT2
2303     if ( m_verRichEdit == 1 )
2304     {
2305         // this is the only thing the control is going to grok
2306         cf.cbSize = sizeof(CHARFORMAT);
2307     }
2308     else
2309 #endif
2310     {
2311         // CHARFORMAT or CHARFORMAT2
2312         cf.cbSize = sizeof(cf);
2313     }
2314
2315     if ( style.HasFont() )
2316     {
2317         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
2318         //     but using it doesn't seem to hurt neither so leaving it for now
2319
2320         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
2321                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
2322
2323         // fill in data from LOGFONT but recalculate lfHeight because we need
2324         // the real height in twips and not the negative number which
2325         // wxFillLogFont() returns (this is correct in general and works with
2326         // the Windows font mapper, but not here)
2327         LOGFONT lf;
2328         wxFillLogFont(&lf, &style.GetFont());
2329         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
2330         cf.bCharSet = lf.lfCharSet;
2331         cf.bPitchAndFamily = lf.lfPitchAndFamily;
2332         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
2333
2334         // also deal with underline/italic/bold attributes: note that we must
2335         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
2336         // style to allow clearing it
2337         if ( lf.lfItalic )
2338         {
2339             cf.dwEffects |= CFE_ITALIC;
2340         }
2341
2342         if ( lf.lfWeight == FW_BOLD )
2343         {
2344             cf.dwEffects |= CFE_BOLD;
2345         }
2346
2347         if ( lf.lfUnderline )
2348         {
2349             cf.dwEffects |= CFE_UNDERLINE;
2350         }
2351
2352         // strikeout fonts are not supported by wxWidgets
2353     }
2354
2355     if ( style.HasTextColour() )
2356     {
2357         cf.dwMask |= CFM_COLOR;
2358         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2359     }
2360
2361 #if wxUSE_RICHEDIT2
2362     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2363     {
2364         cf.dwMask |= CFM_BACKCOLOR;
2365         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2366     }
2367 #endif // wxUSE_RICHEDIT2
2368
2369     // do format the selection
2370     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
2371                             SCF_SELECTION, (LPARAM)&cf) != 0;
2372     if ( !ok )
2373     {
2374         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
2375     }
2376
2377     // now do the paragraph formatting
2378     PARAFORMAT2 pf;
2379     wxZeroMemory(pf);
2380     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2381     // PARAFORMAT in that case
2382 #if wxUSE_RICHEDIT2
2383     if ( m_verRichEdit == 1 )
2384     {
2385         // this is the only thing the control is going to grok
2386         pf.cbSize = sizeof(PARAFORMAT);
2387     }
2388     else
2389 #endif
2390     {
2391         // PARAFORMAT or PARAFORMAT2
2392         pf.cbSize = sizeof(pf);
2393     }
2394
2395     if (style.HasAlignment())
2396     {
2397         pf.dwMask |= PFM_ALIGNMENT;
2398         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2399             pf.wAlignment = PFA_RIGHT;
2400         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2401             pf.wAlignment = PFA_CENTER;
2402         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2403             pf.wAlignment = PFA_JUSTIFY;
2404         else
2405             pf.wAlignment = PFA_LEFT;
2406     }
2407
2408     if (style.HasLeftIndent())
2409     {
2410         pf.dwMask |= PFM_STARTINDENT | PFM_OFFSET;
2411
2412         // Convert from 1/10 mm to TWIPS
2413         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2414         pf.dxOffset = (int) (((double) style.GetLeftSubIndent()) * mm2twips / 10.0) ;
2415     }
2416
2417     if (style.HasRightIndent())
2418     {
2419         pf.dwMask |= PFM_RIGHTINDENT;
2420
2421         // Convert from 1/10 mm to TWIPS
2422         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2423     }
2424
2425     if (style.HasTabs())
2426     {
2427         pf.dwMask |= PFM_TABSTOPS;
2428
2429         const wxArrayInt& tabs = style.GetTabs();
2430
2431         pf.cTabCount = (SHORT)wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2432         size_t i;
2433         for (i = 0; i < (size_t) pf.cTabCount; i++)
2434         {
2435             // Convert from 1/10 mm to TWIPS
2436             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2437         }
2438     }
2439
2440     if (pf.dwMask != 0)
2441     {
2442         // do format the selection
2443         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2444             0, (LPARAM) &pf) != 0;
2445         if ( !ok )
2446         {
2447             wxLogDebug(_T("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2448         }
2449     }
2450
2451     if ( changeSel )
2452     {
2453         // restore the original selection
2454         DoSetSelection(startOld, endOld, false);
2455     }
2456
2457     return ok;
2458 }
2459
2460 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2461 {
2462     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2463         return false;
2464
2465     if ( IsEditable() )
2466     {
2467         // we have to do this or the style wouldn't apply for the text typed by
2468         // the user
2469         wxTextPos posLast = GetLastPosition();
2470         SetStyle(posLast, posLast, m_defaultStyle);
2471     }
2472
2473     return true;
2474 }
2475
2476 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2477 {
2478     if ( !IsRich() )
2479     {
2480         // can't do it with normal text control
2481         return false;
2482     }
2483
2484     // initialize CHARFORMAT struct
2485 #if wxUSE_RICHEDIT2
2486     CHARFORMAT2 cf;
2487 #else
2488     CHARFORMAT cf;
2489 #endif
2490
2491     wxZeroMemory(cf);
2492
2493     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2494     // CHARFORMAT in that case
2495 #if wxUSE_RICHEDIT2
2496     if ( m_verRichEdit == 1 )
2497     {
2498         // this is the only thing the control is going to grok
2499         cf.cbSize = sizeof(CHARFORMAT);
2500     }
2501     else
2502 #endif
2503     {
2504         // CHARFORMAT or CHARFORMAT2
2505         cf.cbSize = sizeof(cf);
2506     }
2507     // we can only change the format of the selection, so select the range we
2508     // want and restore the old selection later
2509     long startOld, endOld;
2510     GetSelection(&startOld, &endOld);
2511
2512     // but do we really have to change the selection?
2513     bool changeSel = position != startOld || position != endOld;
2514
2515     if ( changeSel )
2516     {
2517         DoSetSelection(position, position, false /* don't scroll caret into view */);
2518     }
2519
2520     // get the selection formatting
2521     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2522                             SCF_SELECTION, (LPARAM)&cf) ;
2523
2524
2525     LOGFONT lf;
2526     lf.lfHeight = cf.yHeight;
2527     lf.lfWidth = 0;
2528     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2529     lf.lfClipPrecision = 0;
2530     lf.lfEscapement = 0;
2531     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2532
2533     //NOTE:  we _MUST_ set each of these values to _something_ since we
2534     //do not call wxZeroMemory on the LOGFONT lf
2535     if (cf.dwEffects & CFE_ITALIC)
2536         lf.lfItalic = TRUE;
2537     else
2538         lf.lfItalic = FALSE;
2539
2540     lf.lfOrientation = 0;
2541     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2542     lf.lfQuality = 0;
2543
2544     if (cf.dwEffects & CFE_STRIKEOUT)
2545         lf.lfStrikeOut = TRUE;
2546     else
2547         lf.lfStrikeOut = FALSE;
2548
2549     if (cf.dwEffects & CFE_UNDERLINE)
2550         lf.lfUnderline = TRUE;
2551     else
2552         lf.lfUnderline = FALSE;
2553
2554     if (cf.dwEffects & CFE_BOLD)
2555         lf.lfWeight = FW_BOLD;
2556     else
2557         lf.lfWeight = FW_NORMAL;
2558
2559     wxFont font = wxCreateFontFromLogFont(& lf);
2560     if (font.Ok())
2561     {
2562         style.SetFont(font);
2563     }
2564     style.SetTextColour(wxColour(cf.crTextColor));
2565
2566 #if wxUSE_RICHEDIT2
2567     if ( m_verRichEdit != 1 )
2568     {
2569         // cf.dwMask |= CFM_BACKCOLOR;
2570         style.SetBackgroundColour(wxColour(cf.crBackColor));
2571     }
2572 #endif // wxUSE_RICHEDIT2
2573
2574     // now get the paragraph formatting
2575     PARAFORMAT2 pf;
2576     wxZeroMemory(pf);
2577     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2578     // PARAFORMAT in that case
2579 #if wxUSE_RICHEDIT2
2580     if ( m_verRichEdit == 1 )
2581     {
2582         // this is the only thing the control is going to grok
2583         pf.cbSize = sizeof(PARAFORMAT);
2584     }
2585     else
2586 #endif
2587     {
2588         // PARAFORMAT or PARAFORMAT2
2589         pf.cbSize = sizeof(pf);
2590     }
2591
2592     // do format the selection
2593     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2594
2595     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0), (int) ((double) pf.dxOffset * twips2mm * 10.0) );
2596     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2597
2598     if (pf.wAlignment == PFA_CENTER)
2599         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2600     else if (pf.wAlignment == PFA_RIGHT)
2601         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2602     else if (pf.wAlignment == PFA_JUSTIFY)
2603         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2604     else
2605         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2606
2607     wxArrayInt tabStops;
2608     size_t i;
2609     for (i = 0; i < (size_t) pf.cTabCount; i++)
2610     {
2611         tabStops.Add( (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) );
2612     }
2613
2614     if ( changeSel )
2615     {
2616         // restore the original selection
2617         DoSetSelection(startOld, endOld, false);
2618     }
2619
2620     return true;
2621 }
2622
2623 #endif
2624
2625 // ----------------------------------------------------------------------------
2626 // wxRichEditModule
2627 // ----------------------------------------------------------------------------
2628
2629 bool wxRichEditModule::OnInit()
2630 {
2631     // don't do anything - we will load it when needed
2632     return true;
2633 }
2634
2635 void wxRichEditModule::OnExit()
2636 {
2637     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2638     {
2639         if ( ms_hRichEdit[i] )
2640         {
2641             ::FreeLibrary(ms_hRichEdit[i]);
2642             ms_hRichEdit[i] = NULL;
2643         }
2644     }
2645 }
2646
2647 /* static */
2648 bool wxRichEditModule::Load(int version)
2649 {
2650     // we don't support loading richedit 3.0 as I don't know how to distinguish
2651     // it from 2.0 anyhow
2652     wxCHECK_MSG( version == 1 || version == 2, false,
2653                  _T("incorrect richedit control version requested") );
2654
2655     // make it the index in the array
2656     version--;
2657
2658     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2659     {
2660         // we had already tried to load it and failed
2661         return false;
2662     }
2663
2664     if ( ms_hRichEdit[version] )
2665     {
2666         // we've already got this one
2667         return true;
2668     }
2669
2670     wxString dllname = version ? _T("riched20") : _T("riched32");
2671     dllname += _T(".dll");
2672
2673     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2674
2675     if ( !ms_hRichEdit[version] )
2676     {
2677         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2678
2679         ms_hRichEdit[version] = (HINSTANCE)-1;
2680
2681         return false;
2682     }
2683
2684     return true;
2685 }
2686
2687 #endif // wxUSE_RICHEDIT
2688
2689 #endif // wxUSE_TEXTCTRL && !(__SMARTPHONE__ && __WXWINCE__)