src/msw/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/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 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_TEXTCTRL && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/textctrl.h"
  31     #include "wx/settings.h"
  32     #include "wx/brush.h"
  33     #include "wx/utils.h"
  34     #include "wx/intl.h"
  35     #include "wx/log.h"
  36     #include "wx/app.h"
  37     #include "wx/menu.h"
  38     #include "wx/math.h"
  39     #include "wx/module.h"
  40 #endif
  41
  42 #include "wx/sysopt.h"
  43
  44 #if wxUSE_CLIPBOARD
  45     #include "wx/clipbrd.h"
  46 #endif
  47
  48 #include "wx/textfile.h"
  49
  50 #include <windowsx.h>
  51
  52 #include "wx/msw/private.h"
  53 #include "wx/msw/winundef.h"
  54 #include "wx/msw/mslu.h"
  55
  56 #include <string.h>
  57 #include <stdlib.h>
  58
  59 #ifndef __WXWINCE__
  60 #include <sys/types.h>
  61 #endif
  62
  63 #if wxUSE_RICHEDIT
  64
  65 #if wxUSE_INKEDIT
  66 #include "wx/dynlib.h"
  67 #endif
  68
  69 // old mingw32 has richedit stuff directly in windows.h and doesn't have
  70 // richedit.h at all
  71 #if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__)
  72     #include <richedit.h>
  73 #endif
  74
  75 #endif // wxUSE_RICHEDIT
  76
  77 #include "wx/msw/missing.h"
  78
  79 // ----------------------------------------------------------------------------
  80 // private classes
  81 // ----------------------------------------------------------------------------
  82
  83 #if wxUSE_RICHEDIT
  84
  85 // this module initializes RichEdit DLL(s) if needed
  86 class wxRichEditModule : public wxModule
  87 {
  88 public:
  89     enum Version
  90     {
  91         Version_1,          // riched32.dll
  92         Version_2or3,       // both use riched20.dll
  93         Version_41,         // msftedit.dll (XP SP1 and Windows 2003)
  94         Version_Max
  95     };
  96
  97     virtual bool OnInit();
  98     virtual void OnExit();
  99
 100     // load the richedit DLL for the specified version of rich edit
 101     static bool Load(Version version);
 102
 103 #if wxUSE_INKEDIT
 104     // load the InkEdit library
 105     static bool LoadInkEdit();
 106 #endif
 107
 108 private:
 109     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
 110     static HINSTANCE ms_hRichEdit[Version_Max];
 111
 112 #if wxUSE_INKEDIT
 113     static wxDynamicLibrary ms_inkEditLib;
 114     static bool             ms_inkEditLibLoadAttemped;
 115 #endif
 116
 117     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 118 };
 119
 120 HINSTANCE wxRichEditModule::ms_hRichEdit[Version_Max] = { NULL, NULL, NULL };
 121
 122 #if wxUSE_INKEDIT
 123 wxDynamicLibrary wxRichEditModule::ms_inkEditLib;
 124 bool             wxRichEditModule::ms_inkEditLibLoadAttemped = false;
 125 #endif
 126
 127 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 128
 129 #endif // wxUSE_RICHEDIT
 130
 131 // a small class used to set m_updatesCount to 0 (to filter duplicate events if
 132 // necessary) and to reset it back to -1 afterwards
 133 class UpdatesCountFilter
 134 {
 135 public:
 136     UpdatesCountFilter(int& count)
 137         : m_count(count)
 138     {
 139         wxASSERT_MSG( m_count == -1 || m_count == -2,
 140                       _T("wrong initial m_updatesCount value") );
 141
 142         if (m_count != -2)
 143             m_count = 0;
 144         //else: we don't want to count how many update events we get as we're going
 145         //      to ignore all of them
 146     }
 147
 148     ~UpdatesCountFilter()
 149     {
 150         m_count = -1;
 151     }
 152
 153     // return true if an event has been received
 154     bool GotUpdate() const
 155     {
 156         return m_count == 1;
 157     }
 158
 159 private:
 160     int& m_count;
 161
 162     DECLARE_NO_COPY_CLASS(UpdatesCountFilter)
 163 };
 164
 165 // ----------------------------------------------------------------------------
 166 // event tables and other macros
 167 // ----------------------------------------------------------------------------
 168
 169 #if wxUSE_EXTENDED_RTTI
 170 WX_DEFINE_FLAGS( wxTextCtrlStyle )
 171
 172 wxBEGIN_FLAGS( wxTextCtrlStyle )
 173     // new style border flags, we put them first to
 174     // use them for streaming out
 175     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
 176     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
 177     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
 178     wxFLAGS_MEMBER(wxBORDER_RAISED)
 179     wxFLAGS_MEMBER(wxBORDER_STATIC)
 180     wxFLAGS_MEMBER(wxBORDER_NONE)
 181
 182     // old style border flags
 183     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
 184     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
 185     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
 186     wxFLAGS_MEMBER(wxRAISED_BORDER)
 187     wxFLAGS_MEMBER(wxSTATIC_BORDER)
 188     wxFLAGS_MEMBER(wxBORDER)
 189
 190     // standard window styles
 191     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
 192     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
 193     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
 194     wxFLAGS_MEMBER(wxWANTS_CHARS)
 195     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
 196     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
 197     wxFLAGS_MEMBER(wxVSCROLL)
 198     wxFLAGS_MEMBER(wxHSCROLL)
 199
 200     wxFLAGS_MEMBER(wxTE_PROCESS_ENTER)
 201     wxFLAGS_MEMBER(wxTE_PROCESS_TAB)
 202     wxFLAGS_MEMBER(wxTE_MULTILINE)
 203     wxFLAGS_MEMBER(wxTE_PASSWORD)
 204     wxFLAGS_MEMBER(wxTE_READONLY)
 205     wxFLAGS_MEMBER(wxHSCROLL)
 206     wxFLAGS_MEMBER(wxTE_RICH)
 207     wxFLAGS_MEMBER(wxTE_RICH2)
 208     wxFLAGS_MEMBER(wxTE_AUTO_URL)
 209     wxFLAGS_MEMBER(wxTE_NOHIDESEL)
 210     wxFLAGS_MEMBER(wxTE_LEFT)
 211     wxFLAGS_MEMBER(wxTE_CENTRE)
 212     wxFLAGS_MEMBER(wxTE_RIGHT)
 213     wxFLAGS_MEMBER(wxTE_DONTWRAP)
 214     wxFLAGS_MEMBER(wxTE_CHARWRAP)
 215     wxFLAGS_MEMBER(wxTE_WORDWRAP)
 216
 217 wxEND_FLAGS( wxTextCtrlStyle )
 218
 219 IMPLEMENT_DYNAMIC_CLASS_XTI(wxTextCtrl, wxControl,"wx/textctrl.h")
 220
 221 wxBEGIN_PROPERTIES_TABLE(wxTextCtrl)
 222     wxEVENT_PROPERTY( TextUpdated , wxEVT_COMMAND_TEXT_UPDATED , wxCommandEvent )
 223     wxEVENT_PROPERTY( TextEnter , wxEVT_COMMAND_TEXT_ENTER , wxCommandEvent )
 224
 225     wxPROPERTY( Font , wxFont , SetFont , GetFont  , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 226     wxPROPERTY( Value , wxString , SetValue, GetValue, wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 227     wxPROPERTY_FLAGS( WindowStyle , wxTextCtrlStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 228 wxEND_PROPERTIES_TABLE()
 229
 230 wxBEGIN_HANDLERS_TABLE(wxTextCtrl)
 231 wxEND_HANDLERS_TABLE()
 232
 233 wxCONSTRUCTOR_6( wxTextCtrl , wxWindow* , Parent , wxWindowID , Id , wxString , Value , wxPoint , Position , wxSize , Size , long , WindowStyle)
 234 #else
 235 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxTextCtrlBase)
 236 #endif
 237
 238
 239 BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
 240     EVT_CHAR(wxTextCtrl::OnChar)
 241     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 242
 243 #if wxUSE_RICHEDIT
 244     EVT_CONTEXT_MENU(wxTextCtrl::OnContextMenu)
 245 #endif
 246
 247     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 248     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 249     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 250     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 251     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 252     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 253     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 254
 255     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 256     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 257     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 258     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 259     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 260     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 261     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 262
 263     EVT_SET_FOCUS(wxTextCtrl::OnSetFocus)
 264 END_EVENT_TABLE()
 265
 266 // ----------------------------------------------------------------------------
 267 // function prototypes
 268 // ----------------------------------------------------------------------------
 269
 270 LRESULT APIENTRY _EXPORT wxTextCtrlWndProc(HWND hWnd,
 271                                            UINT message,
 272                                            WPARAM wParam,
 273                                            LPARAM lParam);
 274
 275 // ---------------------------------------------------------------------------
 276 // global vars
 277 // ---------------------------------------------------------------------------
 278
 279 // the pointer to standard text control wnd proc
 280 static WNDPROC gs_wndprocEdit = (WNDPROC)NULL;
 281
 282 // ============================================================================
 283 // implementation
 284 // ============================================================================
 285
 286 // ----------------------------------------------------------------------------
 287 // wnd proc for subclassed edit control
 288 // ----------------------------------------------------------------------------
 289
 290 LRESULT APIENTRY _EXPORT wxTextCtrlWndProc(HWND hWnd,
 291                                            UINT message,
 292                                            WPARAM wParam,
 293                                            LPARAM lParam)
 294 {
 295     switch ( message )
 296     {
 297         case WM_CUT:
 298         case WM_COPY:
 299         case WM_PASTE:
 300             {
 301                 wxWindow *win = wxFindWinFromHandle((WXHWND)hWnd);
 302                 if( win->HandleClipboardEvent( message ) )
 303                     return 0;
 304                 break;
 305             }
 306     }
 307     return ::CallWindowProc(CASTWNDPROC gs_wndprocEdit, hWnd, message, wParam, lParam);
 308 }
 309
 310 // ----------------------------------------------------------------------------
 311 // creation
 312 // ----------------------------------------------------------------------------
 313
 314 void wxTextCtrl::Init()
 315 {
 316 #if wxUSE_RICHEDIT
 317     m_verRichEdit = 0;
 318 #endif // wxUSE_RICHEDIT
 319
 320 #if wxUSE_INKEDIT && wxUSE_RICHEDIT
 321     m_isInkEdit = 0;
 322 #endif
 323
 324     m_privateContextMenu = NULL;
 325     m_updatesCount = -1;
 326     m_isNativeCaretShown = true;
 327 }
 328
 329 wxTextCtrl::~wxTextCtrl()
 330 {
 331     delete m_privateContextMenu;
 332 }
 333
 334 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 335                         const wxString& value,
 336                         const wxPoint& pos,
 337                         const wxSize& size,
 338                         long style,
 339                         const wxValidator& validator,
 340                         const wxString& name)
 341 {
 342 #ifdef __WXWINCE__
 343     if ((style & wxBORDER_MASK) == 0)
 344         style |= wxBORDER_SIMPLE;
 345 #endif
 346
 347     // base initialization
 348     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 349         return false;
 350
 351     // translate wxWin style flags to MSW ones
 352     WXDWORD msStyle = MSWGetCreateWindowFlags();
 353
 354     // do create the control - either an EDIT or RICHEDIT
 355     wxString windowClass = wxT("EDIT");
 356
 357 #if defined(__POCKETPC__) || defined(__SMARTPHONE__)
 358     // A control that capitalizes the first letter
 359     if (style & wxTE_CAPITALIZE)
 360         windowClass = wxT("CAPEDIT");
 361 #endif
 362
 363 #if wxUSE_RICHEDIT
 364     if ( m_windowStyle & wxTE_AUTO_URL )
 365     {
 366         // automatic URL detection only works in RichEdit 2.0+
 367         m_windowStyle |= wxTE_RICH2;
 368     }
 369
 370     if ( m_windowStyle & wxTE_RICH2 )
 371     {
 372         // using richedit 2.0 implies using wxTE_RICH
 373         m_windowStyle |= wxTE_RICH;
 374     }
 375
 376     // we need to load the richedit DLL before creating the rich edit control
 377     if ( m_windowStyle & wxTE_RICH )
 378     {
 379         // versions 2.0, 3.0 and 4.1 of rich edit are mostly compatible with
 380         // each other but not with version 1.0, so we have separate flags for
 381         // the version 1.0 and the others (and so m_verRichEdit may be 0 (plain
 382         // EDIT control), 1 for version 1.0 or 2 for any higher version)
 383         //
 384         // notice that 1.0 has no Unicode support at all so in Unicode build we
 385         // must use another version
 386
 387 #if wxUSE_UNICODE
 388         m_verRichEdit = 2;
 389 #else // !wxUSE_UNICODE
 390         m_verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 391 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 392
 393 #if wxUSE_INKEDIT
 394         // First test if we can load an ink edit control. Normally, all edit
 395         // controls will be made ink edit controls if a tablet environment is
 396         // found (or if msw.inkedit != 0 and the InkEd.dll is present).
 397         // However, an application can veto ink edit controls by either specifying
 398         // msw.inkedit = 0 or by removing wxTE_RICH[2] from the style.
 399         //
 400         if ((wxSystemSettings::HasFeature(wxSYS_TABLET_PRESENT) || wxSystemOptions::GetOptionInt(wxT("msw.inkedit")) != 0) &&
 401             !(wxSystemOptions::HasOption(wxT("msw.inkedit")) && wxSystemOptions::GetOptionInt(wxT("msw.inkedit")) == 0))
 402         {
 403             if (wxRichEditModule::LoadInkEdit())
 404             {
 405                 windowClass = INKEDIT_CLASS;
 406
 407 #if wxUSE_INKEDIT && wxUSE_RICHEDIT
 408                 m_isInkEdit = 1;
 409 #endif
 410
 411                 // Fake rich text version for other calls
 412                 m_verRichEdit = 2;
 413             }
 414         }
 415 #endif
 416
 417         if (!IsInkEdit())
 418         {
 419             if ( m_verRichEdit == 2 )
 420             {
 421                 if ( wxRichEditModule::Load(wxRichEditModule::Version_41) )
 422                 {
 423                     // yes, class name for version 4.1 really is 5.0
 424                     windowClass = _T("RICHEDIT50W");
 425                 }
 426                 else if ( wxRichEditModule::Load(wxRichEditModule::Version_2or3) )
 427                 {
 428                     windowClass = _T("RichEdit20")
 429 #if wxUSE_UNICODE
 430                                 _T("W");
 431 #else // ANSI
 432                                 _T("A");
 433 #endif // Unicode/ANSI
 434                 }
 435                 else // failed to load msftedit.dll and riched20.dll
 436                 {
 437                     m_verRichEdit = 1;
 438                 }
 439             }
 440
 441             if ( m_verRichEdit == 1 )
 442             {
 443                 if ( wxRichEditModule::Load(wxRichEditModule::Version_1) )
 444                 {
 445                     windowClass = _T("RICHEDIT");
 446                 }
 447                 else // failed to load any richedit control DLL
 448                 {
 449                     // only give the error msg once if the DLL can't be loaded
 450                     static bool s_errorGiven = false; // MT ok as only used by GUI
 451
 452                     if ( !s_errorGiven )
 453                     {
 454                         wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 455
 456                         s_errorGiven = true;
 457                     }
 458
 459                     m_verRichEdit = 0;
 460                 }
 461             }
 462         } // !useInkEdit
 463     }
 464 #endif // wxUSE_RICHEDIT
 465
 466     // we need to turn '\n's into "\r\n"s for the multiline controls
 467     wxString valueWin;
 468     if ( m_windowStyle & wxTE_MULTILINE )
 469     {
 470         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 471     }
 472     else // single line
 473     {
 474         valueWin = value;
 475     }
 476
 477     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 478         return false;
 479
 480 #if wxUSE_RICHEDIT
 481     if (IsRich())
 482     {
 483 #if wxUSE_INKEDIT
 484         if (IsInkEdit())
 485         {
 486             // Pass IEM_InsertText (0) as wParam, in order to have the ink always
 487             // converted to text.
 488             ::SendMessage(GetHwnd(), EM_SETINKINSERTMODE, 0, 0);
 489
 490             // Make sure the mouse can be used for input
 491             ::SendMessage(GetHwnd(), EM_SETUSEMOUSEFORINPUT, 1, 0);
 492         }
 493 #endif
 494
 495         // enable the events we're interested in: we want to get EN_CHANGE as
 496         // for the normal controls
 497         LPARAM mask = ENM_CHANGE;
 498
 499         if (GetRichVersion() == 1 && !IsInkEdit())
 500         {
 501             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 502             // explained in its handler
 503            mask |= ENM_MOUSEEVENTS;
 504
 505            // we also need to force the appearance of the vertical scrollbar
 506            // initially as otherwise the control doesn't refresh correctly
 507            // after resize: but once the vertical scrollbar had been shown
 508            // (even if it's subsequently hidden) it does
 509            //
 510            // this is clearly a bug and for now it has been only noticed under
 511            // Windows XP, so if we're sure it works correctly under other
 512            // systems we could do this only for XP
 513            SetSize(-1, 1); // 1 is small enough to force vert scrollbar
 514            SetSize(size);
 515         }
 516         else if ( m_windowStyle & wxTE_AUTO_URL )
 517         {
 518             mask |= ENM_LINK;
 519
 520             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 521         }
 522
 523         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 524     }
 525 #endif // wxUSE_RICHEDIT
 526
 527     gs_wndprocEdit = wxSetWindowProc((HWND)GetHwnd(),
 528                                      wxTextCtrlWndProc);
 529
 530     return true;
 531 }
 532
 533 // Make sure the window style (etc.) reflects the HWND style (roughly)
 534 void wxTextCtrl::AdoptAttributesFromHWND()
 535 {
 536     wxWindow::AdoptAttributesFromHWND();
 537
 538     HWND hWnd = GetHwnd();
 539     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 540
 541     // retrieve the style to see whether this is an edit or richedit ctrl
 542 #if wxUSE_RICHEDIT
 543     wxString classname = wxGetWindowClass(GetHWND());
 544
 545     if ( classname.IsSameAs(_T("EDIT"), false /* no case */) )
 546     {
 547         m_verRichEdit = 0;
 548     }
 549     else // rich edit?
 550     {
 551         wxChar c;
 552         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 553         {
 554             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 555
 556             m_verRichEdit = 0;
 557         }
 558     }
 559 #endif // wxUSE_RICHEDIT
 560
 561     if (style & ES_MULTILINE)
 562         m_windowStyle |= wxTE_MULTILINE;
 563     if (style & ES_PASSWORD)
 564         m_windowStyle |= wxTE_PASSWORD;
 565     if (style & ES_READONLY)
 566         m_windowStyle |= wxTE_READONLY;
 567     if (style & ES_WANTRETURN)
 568         m_windowStyle |= wxTE_PROCESS_ENTER;
 569     if (style & ES_CENTER)
 570         m_windowStyle |= wxTE_CENTRE;
 571     if (style & ES_RIGHT)
 572         m_windowStyle |= wxTE_RIGHT;
 573 }
 574
 575 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 576 {
 577     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 578
 579     // styles which we alaways add by default
 580     if ( style & wxTE_MULTILINE )
 581     {
 582         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 583                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 584
 585         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 586         if ( !(style & wxTE_NO_VSCROLL) )
 587         {
 588             // always adjust the vertical scrollbar automatically if we have it
 589             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 590
 591 #if wxUSE_RICHEDIT
 592             // we have to use this style for the rich edit controls because
 593             // without it the vertical scrollbar never appears at all in
 594             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 595             if ( style & wxTE_RICH2 )
 596             {
 597                 msStyle |= ES_DISABLENOSCROLL;
 598             }
 599 #endif // wxUSE_RICHEDIT
 600         }
 601
 602         style |= wxTE_PROCESS_ENTER;
 603     }
 604     else // !multiline
 605     {
 606         // there is really no reason to not have this style for single line
 607         // text controls
 608         msStyle |= ES_AUTOHSCROLL;
 609     }
 610
 611     // note that wxTE_DONTWRAP is the same as wxHSCROLL so if we have a horz
 612     // scrollbar, there is no wrapping -- which makes sense
 613     if ( style & wxTE_DONTWRAP )
 614     {
 615         // automatically scroll the control horizontally as necessary
 616         //
 617         // NB: ES_AUTOHSCROLL is needed for richedit controls or they don't
 618         //     show horz scrollbar at all, even in spite of WS_HSCROLL, and as
 619         //     it doesn't seem to do any harm for plain edit controls, add it
 620         //     always
 621         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 622     }
 623
 624     if ( style & wxTE_READONLY )
 625         msStyle |= ES_READONLY;
 626
 627     if ( style & wxTE_PASSWORD )
 628         msStyle |= ES_PASSWORD;
 629
 630     if ( style & wxTE_NOHIDESEL )
 631         msStyle |= ES_NOHIDESEL;
 632
 633     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 634     if ( style & wxTE_CENTRE )
 635         msStyle |= ES_CENTER;
 636     else if ( style & wxTE_RIGHT )
 637         msStyle |= ES_RIGHT;
 638     else
 639         msStyle |= ES_LEFT; // ES_LEFT is 0 as well but for consistency...
 640
 641     return msStyle;
 642 }
 643
 644 void wxTextCtrl::SetWindowStyleFlag(long style)
 645 {
 646 #if wxUSE_RICHEDIT
 647     // we have to deal with some styles separately because they can't be
 648     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 649     // using richedit-specific EM_SETOPTIONS
 650     if ( IsRich() &&
 651             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 652     {
 653         bool set = (style & wxTE_NOHIDESEL) != 0;
 654
 655         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 656                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 657     }
 658 #endif // wxUSE_RICHEDIT
 659
 660     wxControl::SetWindowStyleFlag(style);
 661 }
 662
 663 // ----------------------------------------------------------------------------
 664 // set/get the controls text
 665 // ----------------------------------------------------------------------------
 666
 667 bool wxTextCtrl::IsEmpty() const
 668 {
 669     // this is an optimization for multiline controls containing a lot of text
 670     if ( IsMultiLine() && GetNumberOfLines() != 1 )
 671         return false;
 672
 673     return wxTextCtrlBase::IsEmpty();
 674 }
 675
 676 wxString wxTextCtrl::GetValue() const
 677 {
 678     // range 0..-1 is special for GetRange() and means to retrieve all text
 679     return GetRange(0, -1);
 680 }
 681
 682 wxString wxTextCtrl::GetRange(long from, long to) const
 683 {
 684     wxString str;
 685
 686     if ( from >= to && to != -1 )
 687     {
 688         // nothing to retrieve
 689         return str;
 690     }
 691
 692 #if wxUSE_RICHEDIT
 693     if ( IsRich() )
 694     {
 695         int len = GetWindowTextLength(GetHwnd());
 696         if ( len > from )
 697         {
 698             if ( to == -1 )
 699                 to = len;
 700
 701 #if !wxUSE_UNICODE
 702             // we must use EM_STREAMOUT if we don't want to lose all characters
 703             // not representable in the current character set (EM_GETTEXTRANGE
 704             // simply replaces them with question marks...)
 705             if ( GetRichVersion() > 1 )
 706             {
 707                 // we must have some encoding, otherwise any 8bit chars in the
 708                 // control are simply *lost* (replaced by '?')
 709                 wxFontEncoding encoding = wxFONTENCODING_SYSTEM;
 710
 711                 wxFont font = m_defaultStyle.GetFont();
 712                 if ( !font.Ok() )
 713                     font = GetFont();
 714
 715                 if ( font.Ok() )
 716                 {
 717                    encoding = font.GetEncoding();
 718                 }
 719
 720                 if ( encoding == wxFONTENCODING_SYSTEM )
 721                 {
 722                     encoding = wxLocale::GetSystemEncoding();
 723                 }
 724
 725                 if ( encoding == wxFONTENCODING_SYSTEM )
 726                 {
 727                     encoding = wxFONTENCODING_ISO8859_1;
 728                 }
 729
 730                 str = StreamOut(encoding);
 731
 732                 if ( !str.empty() )
 733                 {
 734                     // we have to manually extract the required part, luckily
 735                     // this is easy in this case as EOL characters in str are
 736                     // just LFs because we remove CRs in wxRichEditStreamOut
 737                     str = str.Mid(from, to - from);
 738                 }
 739             }
 740
 741             // StreamOut() wasn't used or failed, try to do it in normal way
 742             if ( str.empty() )
 743 #endif // !wxUSE_UNICODE
 744             {
 745                 // alloc one extra WORD as needed by the control
 746                 wxStringBuffer tmp(str, ++len);
 747                 wxChar *p = tmp;
 748
 749                 TEXTRANGE textRange;
 750                 textRange.chrg.cpMin = from;
 751                 textRange.chrg.cpMax = to;
 752                 textRange.lpstrText = p;
 753
 754                 (void)::SendMessage(GetHwnd(), EM_GETTEXTRANGE,
 755                                     0, (LPARAM)&textRange);
 756
 757                 if ( m_verRichEdit > 1 )
 758                 {
 759                     // RichEdit 2.0 uses just CR ('\r') for the
 760                     // newlines which is neither Unix nor Windows
 761                     // style - convert it to something reasonable
 762                     for ( ; *p; p++ )
 763                     {
 764                         if ( *p == _T('\r') )
 765                             *p = _T('\n');
 766                     }
 767                 }
 768             }
 769
 770             if ( m_verRichEdit == 1 )
 771             {
 772                 // convert to the canonical form - see comment below
 773                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 774             }
 775         }
 776         //else: no text at all, leave the string empty
 777     }
 778     else
 779 #endif // wxUSE_RICHEDIT
 780     {
 781         // retrieve all text
 782         str = wxGetWindowText(GetHWND());
 783
 784         // need only a range?
 785         if ( from < to )
 786         {
 787             str = str.Mid(from, to - from);
 788         }
 789
 790         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 791         // canonical one (same one as above) for consistency with the other kinds
 792         // of controls and, more importantly, with the other ports
 793         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 794     }
 795
 796     return str;
 797 }
 798
 799 void wxTextCtrl::DoSetValue(const wxString& value, int flags)
 800 {
 801     // if the text is long enough, it's faster to just set it instead of first
 802     // comparing it with the old one (chances are that it will be different
 803     // anyhow, this comparison is there to avoid flicker for small single-line
 804     // edit controls mostly)
 805     if ( (value.length() > 0x400) || (value != GetValue()) )
 806     {
 807         DoWriteText(value, flags /* doesn't include SelectionOnly here */);
 808
 809         // mark the control as being not dirty - we changed its text, not the
 810         // user
 811         DiscardEdits();
 812
 813         // for compatibility, don't move the cursor when doing SetValue()
 814         SetInsertionPoint(0);
 815     }
 816     else // same text
 817     {
 818         // still reset the modified flag even if the value didn't really change
 819         // because now it comes from the program and not the user (and do it
 820         // before generating the event so that the event handler could get the
 821         // expected value from IsModified())
 822         DiscardEdits();
 823
 824         // still send an event for consistency
 825         if (flags & SetValue_SendEvent)
 826             SendUpdateEvent();
 827     }
 828 }
 829
 830 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 831
 832 // TODO: using memcpy() would improve performance a lot for big amounts of text
 833
 834 DWORD CALLBACK
 835 wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 836 {
 837     *pcb = 0;
 838
 839     const wchar_t ** const ppws = (const wchar_t **)dwCookie;
 840
 841     wchar_t *wbuf = (wchar_t *)buf;
 842     const wchar_t *wpc = *ppws;
 843     while ( cb && *wpc )
 844     {
 845         *wbuf++ = *wpc++;
 846
 847         cb -= sizeof(wchar_t);
 848         (*pcb) += sizeof(wchar_t);
 849     }
 850
 851     *ppws = wpc;
 852
 853     return 0;
 854 }
 855
 856 // helper struct used to pass parameters from wxTextCtrl to wxRichEditStreamOut
 857 struct wxStreamOutData
 858 {
 859     wchar_t *wpc;
 860     size_t len;
 861 };
 862
 863 DWORD CALLBACK
 864 wxRichEditStreamOut(DWORD_PTR dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 865 {
 866     *pcb = 0;
 867
 868     wxStreamOutData *data = (wxStreamOutData *)dwCookie;
 869
 870     const wchar_t *wbuf = (const wchar_t *)buf;
 871     wchar_t *wpc = data->wpc;
 872     while ( cb )
 873     {
 874         wchar_t wch = *wbuf++;
 875
 876         // turn "\r\n" into "\n" on the fly
 877         if ( wch != L'\r' )
 878             *wpc++ = wch;
 879         else
 880             data->len--;
 881
 882         cb -= sizeof(wchar_t);
 883         (*pcb) += sizeof(wchar_t);
 884     }
 885
 886     data->wpc = wpc;
 887
 888     return 0;
 889 }
 890
 891
 892 #if wxUSE_UNICODE_MSLU
 893     #define UNUSED_IF_MSLU(param)
 894 #else
 895     #define UNUSED_IF_MSLU(param) param
 896 #endif
 897
 898 bool
 899 wxTextCtrl::StreamIn(const wxString& value,
 900                      wxFontEncoding UNUSED_IF_MSLU(encoding),
 901                      bool selectionOnly)
 902 {
 903 #if wxUSE_UNICODE_MSLU
 904     const wchar_t *wpc = value.c_str();
 905 #else // !wxUSE_UNICODE_MSLU
 906     wxCSConv conv(encoding);
 907
 908     const size_t len = conv.MB2WC(NULL, value, value.length());
 909
 910 #if wxUSE_WCHAR_T
 911     wxWCharBuffer wchBuf(len);
 912     wchar_t *wpc = wchBuf.data();
 913 #else
 914     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 915     wchar_t *wpc = wchBuf;
 916 #endif
 917
 918     conv.MB2WC(wpc, value, value.length());
 919 #endif // wxUSE_UNICODE_MSLU
 920
 921     // finally, stream it in the control
 922     EDITSTREAM eds;
 923     wxZeroMemory(eds);
 924     eds.dwCookie = (DWORD)&wpc;
 925     // the cast below is needed for broken (very) old mingw32 headers
 926     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 927
 928     // same problem as in DoWriteText(): we can get multiple events here
 929     UpdatesCountFilter ucf(m_updatesCount);
 930
 931     ::SendMessage(GetHwnd(), EM_STREAMIN,
 932                   SF_TEXT |
 933                   SF_UNICODE |
 934                   (selectionOnly ? SFF_SELECTION : 0),
 935                   (LPARAM)&eds);
 936
 937     // It's okay for EN_UPDATE to not be sent if the selection is empty and
 938     // the text is empty, otherwise warn the programmer about it.
 939     wxASSERT_MSG( ucf.GotUpdate() || ( !HasSelection() && value.empty() ),
 940                   _T("EM_STREAMIN didn't send EN_UPDATE?") );
 941
 942     if ( eds.dwError )
 943     {
 944         wxLogLastError(_T("EM_STREAMIN"));
 945     }
 946
 947 #if !wxUSE_WCHAR_T
 948     free(wchBuf);
 949 #endif // !wxUSE_WCHAR_T
 950
 951     return true;
 952 }
 953
 954 #if !wxUSE_UNICODE_MSLU
 955
 956 wxString
 957 wxTextCtrl::StreamOut(wxFontEncoding encoding, bool selectionOnly) const
 958 {
 959     wxString out;
 960
 961     const int len = GetWindowTextLength(GetHwnd());
 962
 963 #if wxUSE_WCHAR_T
 964     wxWCharBuffer wchBuf(len);
 965     wchar_t *wpc = wchBuf.data();
 966 #else
 967     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 968     wchar_t *wpc = wchBuf;
 969 #endif
 970
 971     wxStreamOutData data;
 972     data.wpc = wpc;
 973     data.len = len;
 974
 975     EDITSTREAM eds;
 976     wxZeroMemory(eds);
 977     eds.dwCookie = (DWORD)&data;
 978     eds.pfnCallback = wxRichEditStreamOut;
 979
 980     ::SendMessage
 981       (
 982         GetHwnd(),
 983         EM_STREAMOUT,
 984         SF_TEXT | SF_UNICODE | (selectionOnly ? SFF_SELECTION : 0),
 985         (LPARAM)&eds
 986       );
 987
 988     if ( eds.dwError )
 989     {
 990         wxLogLastError(_T("EM_STREAMOUT"));
 991     }
 992     else // streamed out ok
 993     {
 994         // NUL-terminate the string because its length could have been
 995         // decreased by wxRichEditStreamOut
 996         *(wchBuf.data() + data.len) = L'\0';
 997
 998         // now convert to the given encoding (this is a possibly lossful
 999         // conversion but what else can we do)
1000         wxCSConv conv(encoding);
1001         size_t lenNeeded = conv.WC2MB(NULL, wchBuf, 0);
1002         if ( lenNeeded++ )
1003         {
1004             conv.WC2MB(wxStringBuffer(out, lenNeeded), wchBuf, lenNeeded);
1005         }
1006     }
1007
1008 #if !wxUSE_WCHAR_T
1009     free(wchBuf);
1010 #endif // !wxUSE_WCHAR_T
1011
1012     return out;
1013 }
1014
1015 #endif // !wxUSE_UNICODE_MSLU
1016
1017 #endif // wxUSE_RICHEDIT
1018
1019 void wxTextCtrl::WriteText(const wxString& value)
1020 {
1021     DoWriteText(value);
1022 }
1023
1024 void wxTextCtrl::DoWriteText(const wxString& value, int flags)
1025 {
1026     bool selectionOnly = (flags & SetValue_SelectionOnly) != 0;
1027     wxString valueDos;
1028     if ( m_windowStyle & wxTE_MULTILINE )
1029         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
1030     else
1031         valueDos = value;
1032
1033 #if wxUSE_RICHEDIT
1034     // there are several complications with the rich edit controls here
1035     bool done = false;
1036     if ( IsRich() )
1037     {
1038         // first, ensure that the new text will be in the default style
1039         if ( !m_defaultStyle.IsDefault() )
1040         {
1041             long start, end;
1042             GetSelection(&start, &end);
1043             SetStyle(start, end, m_defaultStyle);
1044         }
1045
1046 #if wxUSE_UNICODE_MSLU
1047         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
1048         // but EM_STREAMIN works
1049         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
1050         {
1051            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
1052         }
1053 #endif // wxUSE_UNICODE_MSLU
1054
1055 #if !wxUSE_UNICODE
1056         // next check if the text we're inserting must be shown in a non
1057         // default charset -- this only works for RichEdit > 1.0
1058         if ( GetRichVersion() > 1 )
1059         {
1060             wxFont font = m_defaultStyle.GetFont();
1061             if ( !font.Ok() )
1062                 font = GetFont();
1063
1064             if ( font.Ok() )
1065             {
1066                wxFontEncoding encoding = font.GetEncoding();
1067                if ( encoding != wxFONTENCODING_SYSTEM )
1068                {
1069                    // we have to use EM_STREAMIN to force richedit control 2.0+
1070                    // to show any text in the non default charset -- otherwise
1071                    // it thinks it knows better than we do and always shows it
1072                    // in the default one
1073                    done = StreamIn(valueDos, encoding, selectionOnly);
1074                }
1075             }
1076         }
1077 #endif // !wxUSE_UNICODE
1078     }
1079
1080     if ( !done )
1081 #endif // wxUSE_RICHEDIT
1082     {
1083         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
1084         // call (this happens for plain EDITs with EM_REPLACESEL and under some
1085         // -- undetermined -- conditions with rich edit) and sometimes we don't
1086         // get any events at all (plain EDIT with WM_SETTEXT), so ensure that
1087         // we generate exactly one of them by ignoring all but the first one in
1088         // SendUpdateEvent() and generating one ourselves if we hadn't got any
1089         // notifications from Windows
1090         if ( !(flags & SetValue_SendEvent) )
1091             m_updatesCount = -2;        // suppress any update event
1092
1093         UpdatesCountFilter ucf(m_updatesCount);
1094
1095         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
1096                       // EM_REPLACESEL takes 1 to indicate the operation should be redoable
1097                       selectionOnly ? 1 : 0, (LPARAM)valueDos.c_str());
1098
1099         if ( !ucf.GotUpdate() && (flags & SetValue_SendEvent) )
1100         {
1101             SendUpdateEvent();
1102         }
1103     }
1104 }
1105
1106 void wxTextCtrl::AppendText(const wxString& text)
1107 {
1108     SetInsertionPointEnd();
1109
1110     WriteText(text);
1111
1112 #if wxUSE_RICHEDIT
1113     // don't do this if we're frozen, saves some time
1114     if ( !IsFrozen() && IsMultiLine() && GetRichVersion() > 1 )
1115     {
1116         // setting the caret to the end and showing it simply doesn't work for
1117         // RichEdit 2.0 -- force it to still do what we want
1118         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
1119     }
1120 #endif // wxUSE_RICHEDIT
1121 }
1122
1123 void wxTextCtrl::Clear()
1124 {
1125     ::SetWindowText(GetHwnd(), wxEmptyString);
1126
1127 #if wxUSE_RICHEDIT
1128     if ( !IsRich() )
1129 #endif // wxUSE_RICHEDIT
1130     {
1131         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
1132         // but the normal ones don't -- make Clear() behaviour consistent by
1133         // always sending this event
1134
1135         // Windows already sends an update event for single-line
1136         // controls.
1137         if ( m_windowStyle & wxTE_MULTILINE )
1138             SendUpdateEvent();
1139     }
1140 }
1141
1142 #ifdef __WIN32__
1143
1144 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
1145 {
1146     SetFocus();
1147
1148     size_t lenOld = GetValue().length();
1149
1150     wxUint32 code = event.GetRawKeyCode();
1151     ::keybd_event((BYTE)code, 0, 0 /* key press */, 0);
1152     ::keybd_event((BYTE)code, 0, KEYEVENTF_KEYUP, 0);
1153
1154     // assume that any alphanumeric key changes the total number of characters
1155     // in the control - this should work in 99% of cases
1156     return GetValue().length() != lenOld;
1157 }
1158
1159 #endif // __WIN32__
1160
1161 // ----------------------------------------------------------------------------
1162 // Clipboard operations
1163 // ----------------------------------------------------------------------------
1164
1165 void wxTextCtrl::Copy()
1166 {
1167     if (CanCopy())
1168     {
1169         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
1170     }
1171 }
1172
1173 void wxTextCtrl::Cut()
1174 {
1175     if (CanCut())
1176     {
1177         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
1178     }
1179 }
1180
1181 void wxTextCtrl::Paste()
1182 {
1183     if (CanPaste())
1184     {
1185         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
1186     }
1187 }
1188
1189 bool wxTextCtrl::HasSelection() const
1190 {
1191     long from, to;
1192     GetSelection(&from, &to);
1193     return from != to;
1194 }
1195
1196 bool wxTextCtrl::CanCopy() const
1197 {
1198     // Can copy if there's a selection
1199     return HasSelection();
1200 }
1201
1202 bool wxTextCtrl::CanCut() const
1203 {
1204     return CanCopy() && IsEditable();
1205 }
1206
1207 bool wxTextCtrl::CanPaste() const
1208 {
1209     if ( !IsEditable() )
1210         return false;
1211
1212 #if wxUSE_RICHEDIT
1213     if ( IsRich() )
1214     {
1215         UINT cf = 0; // 0 == any format
1216
1217         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
1218     }
1219 #endif // wxUSE_RICHEDIT
1220
1221     // Standard edit control: check for straight text on clipboard
1222     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
1223         return false;
1224
1225     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
1226     ::CloseClipboard();
1227
1228     return isTextAvailable;
1229 }
1230
1231 // ----------------------------------------------------------------------------
1232 // Accessors
1233 // ----------------------------------------------------------------------------
1234
1235 void wxTextCtrl::SetEditable(bool editable)
1236 {
1237     HWND hWnd = GetHwnd();
1238     ::SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
1239 }
1240
1241 void wxTextCtrl::SetInsertionPoint(long pos)
1242 {
1243     DoSetSelection(pos, pos);
1244 }
1245
1246 void wxTextCtrl::SetInsertionPointEnd()
1247 {
1248     // we must not do anything if the caret is already there because calling
1249     // SetInsertionPoint() thaws the controls if Freeze() had been called even
1250     // if it doesn't actually move the caret anywhere and so the simple fact of
1251     // doing it results in horrible flicker when appending big amounts of text
1252     // to the control in a few chunks (see DoAddText() test in the text sample)
1253     const wxTextPos lastPosition = GetLastPosition();
1254     if ( GetInsertionPoint() == lastPosition )
1255     {
1256         return;
1257     }
1258
1259     long pos;
1260
1261 #if wxUSE_RICHEDIT
1262     if ( m_verRichEdit == 1 )
1263     {
1264         // we don't have to waste time calling GetLastPosition() in this case
1265         pos = -1;
1266     }
1267     else // !RichEdit 1.0
1268 #endif // wxUSE_RICHEDIT
1269     {
1270         pos = lastPosition;
1271     }
1272
1273     SetInsertionPoint(pos);
1274 }
1275
1276 long wxTextCtrl::GetInsertionPoint() const
1277 {
1278 #if wxUSE_RICHEDIT
1279     if ( IsRich() )
1280     {
1281         CHARRANGE range;
1282         range.cpMin = 0;
1283         range.cpMax = 0;
1284         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
1285         return range.cpMin;
1286     }
1287 #endif // wxUSE_RICHEDIT
1288
1289     DWORD Pos = (DWORD)::SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
1290     return Pos & 0xFFFF;
1291 }
1292
1293 wxTextPos wxTextCtrl::GetLastPosition() const
1294 {
1295     int numLines = GetNumberOfLines();
1296     long posStartLastLine = XYToPosition(0, numLines - 1);
1297
1298     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
1299
1300     return posStartLastLine + lenLastLine;
1301 }
1302
1303 // If the return values from and to are the same, there is no
1304 // selection.
1305 void wxTextCtrl::GetSelection(long* from, long* to) const
1306 {
1307 #if wxUSE_RICHEDIT
1308     if ( IsRich() )
1309     {
1310         CHARRANGE charRange;
1311         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
1312
1313         *from = charRange.cpMin;
1314         *to = charRange.cpMax;
1315     }
1316     else
1317 #endif // !wxUSE_RICHEDIT
1318     {
1319         DWORD dwStart, dwEnd;
1320         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
1321
1322         *from = dwStart;
1323         *to = dwEnd;
1324     }
1325 }
1326
1327 bool wxTextCtrl::IsEditable() const
1328 {
1329     // strangely enough, we may be called before the control is created: our
1330     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
1331     // us
1332     if ( !m_hWnd )
1333         return true;
1334
1335     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1336
1337     return (style & ES_READONLY) == 0;
1338 }
1339
1340 // ----------------------------------------------------------------------------
1341 // selection
1342 // ----------------------------------------------------------------------------
1343
1344 void wxTextCtrl::SetSelection(long from, long to)
1345 {
1346     // if from and to are both -1, it means (in wxWidgets) that all text should
1347     // be selected - translate into Windows convention
1348     if ( (from == -1) && (to == -1) )
1349     {
1350         from = 0;
1351         to = -1;
1352     }
1353
1354     DoSetSelection(from, to);
1355 }
1356
1357 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
1358 {
1359     HWND hWnd = GetHwnd();
1360
1361 #if wxUSE_RICHEDIT
1362     if ( IsRich() )
1363     {
1364         CHARRANGE range;
1365         range.cpMin = from;
1366         range.cpMax = to;
1367         ::SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
1368     }
1369     else
1370 #endif // wxUSE_RICHEDIT
1371     {
1372         ::SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
1373     }
1374
1375     if ( scrollCaret && !IsFrozen() )
1376     {
1377 #if wxUSE_RICHEDIT
1378         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1379         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1380         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1381         // option is set (but it does work ok in richedit 1.0 mode...)
1382         //
1383         // so to make it work we either need to give focus to it here which
1384         // will probably create many problems (dummy focus events; window
1385         // containing the text control being brought to foreground
1386         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1387         // create other problems too -- and in fact it does because if we turn
1388         // on/off this style while appending the text to the control, the
1389         // vertical scrollbar never appears in it even if we append tons of
1390         // text and to work around this the only solution I found was to use
1391         // ES_DISABLENOSCROLL
1392         //
1393         // this is very ugly but I don't see any other way to make this work
1394         long style = 0;
1395         if ( GetRichVersion() > 1 )
1396         {
1397             if ( !HasFlag(wxTE_NOHIDESEL) )
1398             {
1399                 // setting ECO_NOHIDESEL also sets WS_VISIBLE and possibly
1400                 // others, remember the style so we can reset it later if needed
1401                 style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1402                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1403                               ECOOP_OR, ECO_NOHIDESEL);
1404             }
1405             //else: everything is already ok
1406         }
1407 #endif // wxUSE_RICHEDIT
1408
1409         ::SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1410
1411 #if wxUSE_RICHEDIT
1412         // restore ECO_NOHIDESEL if we changed it
1413         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1414         {
1415             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1416                           ECOOP_AND, ~ECO_NOHIDESEL);
1417             if ( style != ::GetWindowLong(GetHwnd(), GWL_STYLE) )
1418                 ::SetWindowLong(GetHwnd(), GWL_STYLE, style);
1419         }
1420 #endif // wxUSE_RICHEDIT
1421     }
1422 }
1423
1424 // ----------------------------------------------------------------------------
1425 // Working with files
1426 // ----------------------------------------------------------------------------
1427
1428 bool wxTextCtrl::DoLoadFile(const wxString& file, int fileType)
1429 {
1430     if ( wxTextCtrlBase::DoLoadFile(file, fileType) )
1431     {
1432         // update the size limit if needed
1433         AdjustSpaceLimit();
1434
1435         return true;
1436     }
1437
1438     return false;
1439 }
1440
1441 // ----------------------------------------------------------------------------
1442 // Editing
1443 // ----------------------------------------------------------------------------
1444
1445 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1446 {
1447     // Set selection and remove it
1448     DoSetSelection(from, to, false /* don't scroll caret into view */);
1449
1450     DoWriteText(value);
1451 }
1452
1453 void wxTextCtrl::Remove(long from, long to)
1454 {
1455     Replace(from, to, wxEmptyString);
1456 }
1457
1458 bool wxTextCtrl::IsModified() const
1459 {
1460     return ::SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1461 }
1462
1463 void wxTextCtrl::MarkDirty()
1464 {
1465     ::SendMessage(GetHwnd(), EM_SETMODIFY, TRUE, 0L);
1466 }
1467
1468 void wxTextCtrl::DiscardEdits()
1469 {
1470     ::SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1471 }
1472
1473 int wxTextCtrl::GetNumberOfLines() const
1474 {
1475     return (int)::SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1476 }
1477
1478 // ----------------------------------------------------------------------------
1479 // Positions <-> coords
1480 // ----------------------------------------------------------------------------
1481
1482 long wxTextCtrl::XYToPosition(long x, long y) const
1483 {
1484     // This gets the char index for the _beginning_ of this line
1485     long charIndex = ::SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1486
1487     return charIndex + x;
1488 }
1489
1490 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1491 {
1492     HWND hWnd = GetHwnd();
1493
1494     // This gets the line number containing the character
1495     long lineNo;
1496 #if wxUSE_RICHEDIT
1497     if ( IsRich() )
1498     {
1499         lineNo = ::SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1500     }
1501     else
1502 #endif // wxUSE_RICHEDIT
1503     {
1504         lineNo = ::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1505     }
1506
1507     if ( lineNo == -1 )
1508     {
1509         // no such line
1510         return false;
1511     }
1512
1513     // This gets the char index for the _beginning_ of this line
1514     long charIndex = ::SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1515     if ( charIndex == -1 )
1516     {
1517         return false;
1518     }
1519
1520     // The X position must therefore be the different between pos and charIndex
1521     if ( x )
1522         *x = pos - charIndex;
1523     if ( y )
1524         *y = lineNo;
1525
1526     return true;
1527 }
1528
1529 wxTextCtrlHitTestResult
1530 wxTextCtrl::HitTest(const wxPoint& pt, long *posOut) const
1531 {
1532     // first get the position from Windows
1533     LPARAM lParam;
1534
1535 #if wxUSE_RICHEDIT
1536     POINTL ptl;
1537     if ( IsRich() )
1538     {
1539         // for rich edit controls the position is passed iva the struct fields
1540         ptl.x = pt.x;
1541         ptl.y = pt.y;
1542         lParam = (LPARAM)&ptl;
1543     }
1544     else
1545 #endif // wxUSE_RICHEDIT
1546     {
1547         // for the plain ones, we are limited to 16 bit positions which are
1548         // combined in a single 32 bit value
1549         lParam = MAKELPARAM(pt.x, pt.y);
1550     }
1551
1552     LRESULT pos = ::SendMessage(GetHwnd(), EM_CHARFROMPOS, 0, lParam);
1553
1554     if ( pos == -1 )
1555     {
1556         // this seems to indicate an error...
1557         return wxTE_HT_UNKNOWN;
1558     }
1559
1560 #if wxUSE_RICHEDIT
1561     if ( !IsRich() )
1562 #endif // wxUSE_RICHEDIT
1563     {
1564         // for plain EDIT controls the higher word contains something else
1565         pos = LOWORD(pos);
1566     }
1567
1568
1569     // next determine where it is relatively to our point: EM_CHARFROMPOS
1570     // always returns the closest character but we need to be more precise, so
1571     // double check that we really are where it pretends
1572     POINTL ptReal;
1573
1574 #if wxUSE_RICHEDIT
1575     // FIXME: we need to distinguish between richedit 2 and 3 here somehow but
1576     //        we don't know how to do it
1577     if ( IsRich() )
1578     {
1579         ::SendMessage(GetHwnd(), EM_POSFROMCHAR, (WPARAM)&ptReal, pos);
1580     }
1581     else
1582 #endif // wxUSE_RICHEDIT
1583     {
1584         LRESULT lRc = ::SendMessage(GetHwnd(), EM_POSFROMCHAR, pos, 0);
1585
1586         if ( lRc == -1 )
1587         {
1588             // this is apparently returned when pos corresponds to the last
1589             // position
1590             ptReal.x =
1591             ptReal.y = 0;
1592         }
1593         else
1594         {
1595             ptReal.x = LOWORD(lRc);
1596             ptReal.y = HIWORD(lRc);
1597         }
1598     }
1599
1600     wxTextCtrlHitTestResult rc;
1601
1602     if ( pt.y > ptReal.y + GetCharHeight() )
1603         rc = wxTE_HT_BELOW;
1604     else if ( pt.x > ptReal.x + GetCharWidth() )
1605         rc = wxTE_HT_BEYOND;
1606     else
1607         rc = wxTE_HT_ON_TEXT;
1608
1609     if ( posOut )
1610         *posOut = pos;
1611
1612     return rc;
1613 }
1614
1615 // ----------------------------------------------------------------------------
1616 //
1617 // ----------------------------------------------------------------------------
1618
1619 void wxTextCtrl::ShowPosition(long pos)
1620 {
1621     HWND hWnd = GetHwnd();
1622
1623     // To scroll to a position, we pass the number of lines and characters
1624     // to scroll *by*. This means that we need to:
1625     // (1) Find the line position of the current line.
1626     // (2) Find the line position of pos.
1627     // (3) Scroll by (pos - current).
1628     // For now, ignore the horizontal scrolling.
1629
1630     // Is this where scrolling is relative to - the line containing the caret?
1631     // Or is the first visible line??? Try first visible line.
1632 //    int currentLineLineNo1 = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1633
1634     int currentLineLineNo = (int)::SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1635
1636     int specifiedLineLineNo = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1637
1638     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1639
1640     if (linesToScroll != 0)
1641       (void)::SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1642 }
1643
1644 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1645 {
1646     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1647 }
1648
1649 int wxTextCtrl::GetLineLength(long lineNo) const
1650 {
1651     long pos = XYToPosition(0, lineNo);
1652
1653     return GetLengthOfLineContainingPos(pos);
1654 }
1655
1656 wxString wxTextCtrl::GetLineText(long lineNo) const
1657 {
1658     size_t len = (size_t)GetLineLength(lineNo) + 1;
1659
1660     // there must be at least enough place for the length WORD in the
1661     // buffer
1662     len += sizeof(WORD);
1663
1664     wxString str;
1665     {
1666         wxStringBufferLength tmp(str, len);
1667         wxChar *buf = tmp;
1668
1669         *(WORD *)buf = (WORD)len;
1670         len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1671
1672 #if wxUSE_RICHEDIT
1673         if ( IsRich() )
1674         {
1675             // remove the '\r' returned by the rich edit control, the user code
1676             // should never see it
1677             if ( buf[len - 2] == _T('\r') && buf[len - 1] == _T('\n') )
1678             {
1679                 buf[len - 2] = _T('\n');
1680                 len--;
1681             }
1682         }
1683 #endif // wxUSE_RICHEDIT
1684
1685         // remove the '\n' at the end, if any (this is how this function is
1686         // supposed to work according to the docs)
1687         if ( buf[len - 1] == _T('\n') )
1688         {
1689             len--;
1690         }
1691
1692         buf[len] = 0;
1693         tmp.SetLength(len);
1694     }
1695
1696     return str;
1697 }
1698
1699 void wxTextCtrl::SetMaxLength(unsigned long len)
1700 {
1701 #if wxUSE_RICHEDIT
1702     if ( IsRich() )
1703     {
1704         ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, len ? len : 0x7fffffff);
1705     }
1706     else
1707 #endif // wxUSE_RICHEDIT
1708     {
1709         if ( len >= 0xffff )
1710         {
1711             // this will set it to a platform-dependent maximum (much more
1712             // than 64Kb under NT)
1713             len = 0;
1714         }
1715
1716         ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1717     }
1718 }
1719
1720 // ----------------------------------------------------------------------------
1721 // Undo/redo
1722 // ----------------------------------------------------------------------------
1723
1724 void wxTextCtrl::Undo()
1725 {
1726     if (CanUndo())
1727     {
1728         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1729     }
1730 }
1731
1732 void wxTextCtrl::Redo()
1733 {
1734     if (CanRedo())
1735     {
1736 #if wxUSE_RICHEDIT
1737         if (GetRichVersion() > 1)
1738             ::SendMessage(GetHwnd(), EM_REDO, 0, 0);
1739         else
1740 #endif
1741         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1742         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1743     }
1744 }
1745
1746 bool wxTextCtrl::CanUndo() const
1747 {
1748     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1749 }
1750
1751 bool wxTextCtrl::CanRedo() const
1752 {
1753 #if wxUSE_RICHEDIT
1754     if (GetRichVersion() > 1)
1755         return ::SendMessage(GetHwnd(), EM_CANREDO, 0, 0) != 0;
1756     else
1757 #endif
1758     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1759 }
1760
1761 // ----------------------------------------------------------------------------
1762 // caret handling (Windows only)
1763 // ----------------------------------------------------------------------------
1764
1765 bool wxTextCtrl::ShowNativeCaret(bool show)
1766 {
1767     if ( show != m_isNativeCaretShown )
1768     {
1769         if ( !(show ? ::ShowCaret(GetHwnd()) : ::HideCaret(GetHwnd())) )
1770         {
1771             // not an error, may simply indicate that it's not shown/hidden
1772             // yet (i.e. it had been hidden/showh 2 times before)
1773             return false;
1774         }
1775
1776         m_isNativeCaretShown = show;
1777     }
1778
1779     return true;
1780 }
1781
1782 // ----------------------------------------------------------------------------
1783 // implemenation details
1784 // ----------------------------------------------------------------------------
1785
1786 void wxTextCtrl::Command(wxCommandEvent & event)
1787 {
1788     SetValue(event.GetString());
1789     ProcessCommand (event);
1790 }
1791
1792 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1793 {
1794     // By default, load the first file into the text window.
1795     if (event.GetNumberOfFiles() > 0)
1796     {
1797         LoadFile(event.GetFiles()[0]);
1798     }
1799 }
1800
1801 // ----------------------------------------------------------------------------
1802 // kbd input processing
1803 // ----------------------------------------------------------------------------
1804
1805 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* msg)
1806 {
1807     // check for our special keys here: if we don't do it and the parent frame
1808     // uses them as accelerators, they wouldn't work at all, so we disable
1809     // usual preprocessing for them
1810     if ( msg->message == WM_KEYDOWN )
1811     {
1812         const WPARAM vkey = msg->wParam;
1813         if ( HIWORD(msg->lParam) & KF_ALTDOWN )
1814         {
1815             // Alt-Backspace is accelerator for "Undo"
1816             if ( vkey == VK_BACK )
1817                 return false;
1818         }
1819         else // no Alt
1820         {
1821             // we want to process some Ctrl-foo and Shift-bar but no key
1822             // combinations without either Ctrl or Shift nor with both of them
1823             // pressed
1824             const int ctrl = wxIsCtrlDown(),
1825                       shift = wxIsShiftDown();
1826             switch ( ctrl + shift )
1827             {
1828                 default:
1829                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1830                     // fall through
1831
1832                 case 0:
1833                     if ( IsMultiLine() && vkey == VK_RETURN )
1834                         return false;
1835                     // fall through
1836                 case 2:
1837                     break;
1838
1839                 case 1:
1840                     // either Ctrl or Shift pressed
1841                     if ( ctrl )
1842                     {
1843                         switch ( vkey )
1844                         {
1845                             case 'C':
1846                             case 'V':
1847                             case 'X':
1848                             case VK_INSERT:
1849                             case VK_DELETE:
1850                             case VK_HOME:
1851                             case VK_END:
1852                                 return false;
1853                         }
1854                     }
1855                     else // Shift is pressed
1856                     {
1857                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1858                             return false;
1859                     }
1860             }
1861         }
1862     }
1863
1864     return wxControl::MSWShouldPreProcessMessage(msg);
1865 }
1866
1867 void wxTextCtrl::OnChar(wxKeyEvent& event)
1868 {
1869     switch ( event.GetKeyCode() )
1870     {
1871         case WXK_RETURN:
1872             {
1873                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1874                 InitCommandEvent(event);
1875                 event.SetString(GetValue());
1876                 if ( GetEventHandler()->ProcessEvent(event) )
1877                 if ( !HasFlag(wxTE_MULTILINE) )
1878                     return;
1879                 //else: multiline controls need Enter for themselves
1880             }
1881             break;
1882
1883         case WXK_TAB:
1884             // ok, so this is getting absolutely ridiculous but I don't see
1885             // any other way to fix this bug: when a multiline text control is
1886             // inside a wxFrame, we need to generate the navigation event as
1887             // otherwise nothing happens at all, but when the same control is
1888             // created inside a dialog, IsDialogMessage() *does* switch focus
1889             // all by itself and so if we do it here as well, it is advanced
1890             // twice and goes to the next control... to prevent this from
1891             // happening we're doing this ugly check, the logic being that if
1892             // we don't have focus then it had been already changed to the next
1893             // control
1894             //
1895             // the right thing to do would, of course, be to understand what
1896             // the hell is IsDialogMessage() doing but this is beyond my feeble
1897             // forces at the moment unfortunately
1898             if ( !(m_windowStyle & wxTE_PROCESS_TAB))
1899             {
1900                 if ( FindFocus() == this )
1901                 {
1902                     int flags = 0;
1903                     if (!event.ShiftDown())
1904                         flags |= wxNavigationKeyEvent::IsForward ;
1905                     if (event.ControlDown())
1906                         flags |= wxNavigationKeyEvent::WinChange ;
1907                     if (Navigate(flags))
1908                         return;
1909                 }
1910             }
1911             else
1912             {
1913                 // Insert tab since calling the default Windows handler
1914                 // doesn't seem to do it
1915                 WriteText(wxT("\t"));
1916                 return;
1917             }
1918             break;
1919     }
1920
1921     // no, we didn't process it
1922     event.Skip();
1923 }
1924
1925 WXLRESULT wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1926 {
1927     WXLRESULT lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1928
1929     if ( nMsg == WM_GETDLGCODE )
1930     {
1931         // we always want the chars and the arrows: the arrows for navigation
1932         // and the chars because we want Ctrl-C to work even in a read only
1933         // control
1934         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1935
1936         if ( IsEditable() )
1937         {
1938             // we may have several different cases:
1939             // 1. normal case: both TAB and ENTER are used for dlg navigation
1940             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1941             //    next control in the dialog
1942             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1943             //    navigation
1944             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1945             //    to the next control
1946
1947             // the multiline edit control should always get <Return> for itself
1948             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1949                 lDlgCode |= DLGC_WANTMESSAGE;
1950
1951             if ( HasFlag(wxTE_PROCESS_TAB) )
1952                 lDlgCode |= DLGC_WANTTAB;
1953
1954             lRc |= lDlgCode;
1955         }
1956         else // !editable
1957         {
1958             // NB: use "=", not "|=" as the base class version returns the
1959             //     same flags is this state as usual (i.e. including
1960             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1961             //     native Win32 apps?) but for now live with it.
1962             lRc = lDlgCode;
1963         }
1964     }
1965
1966     return lRc;
1967 }
1968
1969 // ----------------------------------------------------------------------------
1970 // text control event processing
1971 // ----------------------------------------------------------------------------
1972
1973 bool wxTextCtrl::SendUpdateEvent()
1974 {
1975     switch ( m_updatesCount )
1976     {
1977         case 0:
1978             // remember that we've got an update
1979             m_updatesCount++;
1980             break;
1981
1982         case 1:
1983             // we had already sent one event since the last control modification
1984             return false;
1985
1986         default:
1987             wxFAIL_MSG( _T("unexpected wxTextCtrl::m_updatesCount value") );
1988             // fall through
1989
1990         case -1:
1991             // we hadn't updated the control ourselves, this event comes from
1992             // the user, don't need to ignore it nor update the count
1993             break;
1994
1995         case -2:
1996             // the control was updated programmatically and we do NOT want to
1997             // send events
1998             return false;
1999     }
2000
2001     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
2002     InitCommandEvent(event);
2003
2004     return ProcessCommand(event);
2005 }
2006
2007 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
2008 {
2009     switch ( param )
2010     {
2011         case EN_SETFOCUS:
2012         case EN_KILLFOCUS:
2013             {
2014                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
2015                                                          : wxEVT_SET_FOCUS,
2016                                    m_windowId);
2017                 event.SetEventObject(this);
2018                 GetEventHandler()->ProcessEvent(event);
2019             }
2020             break;
2021
2022         case EN_CHANGE:
2023             SendUpdateEvent();
2024             break;
2025
2026         case EN_MAXTEXT:
2027             // the text size limit has been hit -- try to increase it
2028             if ( !AdjustSpaceLimit() )
2029             {
2030                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
2031                 InitCommandEvent(event);
2032                 event.SetString(GetValue());
2033                 ProcessCommand(event);
2034             }
2035             break;
2036
2037             // the other edit notification messages are not processed
2038         default:
2039             return false;
2040     }
2041
2042     // processed
2043     return true;
2044 }
2045
2046 WXHBRUSH wxTextCtrl::MSWControlColor(WXHDC hDC, WXHWND hWnd)
2047 {
2048     if ( !IsEnabled() && !HasFlag(wxTE_MULTILINE) )
2049         return MSWControlColorDisabled(hDC);
2050
2051     return wxTextCtrlBase::MSWControlColor(hDC, hWnd);
2052 }
2053
2054 bool wxTextCtrl::HasSpaceLimit(unsigned int *len) const
2055 {
2056     // HACK: we try to automatically extend the limit for the amount of text
2057     //       to allow (interactively) entering more than 64Kb of text under
2058     //       Win9x but we shouldn't reset the text limit which was previously
2059     //       set explicitly with SetMaxLength()
2060     //
2061     //       Unfortunately there is no EM_GETLIMITTEXTSETBYUSER and so we don't
2062     //       know the limit we set (if any). We could solve this by storing the
2063     //       limit we set in wxTextCtrl but to save space we prefer to simply
2064     //       test here the actual limit value: we consider that SetMaxLength()
2065     //       can only be called for small values while EN_MAXTEXT is only sent
2066     //       for large values (in practice the default limit seems to be 30000
2067     //       but make it smaller just to be on the safe side)
2068     *len = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
2069     return *len < 10001;
2070
2071 }
2072
2073 bool wxTextCtrl::AdjustSpaceLimit()
2074 {
2075     unsigned int limit;
2076     if ( HasSpaceLimit(&limit) )
2077         return false;
2078
2079     unsigned int len = ::GetWindowTextLength(GetHwnd());
2080     if ( len >= limit )
2081     {
2082         // increment in 32Kb chunks
2083         SetMaxLength(len + 0x8000);
2084     }
2085
2086     // we changed the limit
2087     return true;
2088 }
2089
2090 bool wxTextCtrl::AcceptsFocus() const
2091 {
2092     // we don't want focus if we can't be edited unless we're a multiline
2093     // control because then it might be still nice to get focus from keyboard
2094     // to be able to scroll it without mouse
2095     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
2096 }
2097
2098 wxSize wxTextCtrl::DoGetBestSize() const
2099 {
2100     int cx, cy;
2101     wxGetCharSize(GetHWND(), &cx, &cy, GetFont());
2102
2103     int wText = DEFAULT_ITEM_WIDTH;
2104
2105     int hText = cy;
2106     if ( m_windowStyle & wxTE_MULTILINE )
2107     {
2108         hText *= wxMax(wxMin(GetNumberOfLines(), 10), 2);
2109     }
2110     //else: for single line control everything is ok
2111
2112     // we have to add the adjustments for the control height only once, not
2113     // once per line, so do it after multiplication above
2114     hText += EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy) - cy;
2115
2116     return wxSize(wText, hText);
2117 }
2118
2119 // ----------------------------------------------------------------------------
2120 // standard handlers for standard edit menu events
2121 // ----------------------------------------------------------------------------
2122
2123 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2124 {
2125     Cut();
2126 }
2127
2128 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2129 {
2130     Copy();
2131 }
2132
2133 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2134 {
2135     Paste();
2136 }
2137
2138 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2139 {
2140     Undo();
2141 }
2142
2143 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2144 {
2145     Redo();
2146 }
2147
2148 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
2149 {
2150     long from, to;
2151     GetSelection(& from, & to);
2152     if (from != -1 && to != -1)
2153         Remove(from, to);
2154 }
2155
2156 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2157 {
2158     SetSelection(-1, -1);
2159 }
2160
2161 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2162 {
2163     event.Enable( CanCut() );
2164 }
2165
2166 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2167 {
2168     event.Enable( CanCopy() );
2169 }
2170
2171 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2172 {
2173     event.Enable( CanPaste() );
2174 }
2175
2176 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2177 {
2178     event.Enable( CanUndo() );
2179 }
2180
2181 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2182 {
2183     event.Enable( CanRedo() );
2184 }
2185
2186 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
2187 {
2188     long from, to;
2189     GetSelection(& from, & to);
2190     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
2191 }
2192
2193 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2194 {
2195     event.Enable(GetLastPosition() > 0);
2196 }
2197
2198 void wxTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2199 {
2200 #if wxUSE_RICHEDIT
2201     if (IsRich())
2202     {
2203         if (!m_privateContextMenu)
2204         {
2205             m_privateContextMenu = new wxMenu;
2206             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
2207             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
2208             m_privateContextMenu->AppendSeparator();
2209             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
2210             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
2211             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
2212             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
2213             m_privateContextMenu->AppendSeparator();
2214             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
2215         }
2216         PopupMenu(m_privateContextMenu);
2217         return;
2218     }
2219     else
2220 #endif
2221     event.Skip();
2222 }
2223
2224 void wxTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
2225 {
2226     // be sure the caret remains invisible if the user had hidden it
2227     if ( !m_isNativeCaretShown )
2228     {
2229         ::HideCaret(GetHwnd());
2230     }
2231 }
2232
2233 // ----------------------------------------------------------------------------
2234 // Default colors for MSW text control
2235 //
2236 // Set default background color to the native white instead of
2237 // the default wxSYS_COLOUR_BTNFACE (is triggered with wxNullColour).
2238 // ----------------------------------------------------------------------------
2239
2240 wxVisualAttributes wxTextCtrl::GetDefaultAttributes() const
2241 {
2242     wxVisualAttributes attrs;
2243     attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
2244     attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
2245     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW); //white
2246
2247     return attrs;
2248 }
2249
2250 // the rest of the file only deals with the rich edit controls
2251 #if wxUSE_RICHEDIT
2252
2253 // ----------------------------------------------------------------------------
2254 // EN_LINK processing
2255 // ----------------------------------------------------------------------------
2256
2257 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
2258 {
2259     NMHDR *hdr = (NMHDR* )lParam;
2260     switch ( hdr->code )
2261     {
2262        case EN_MSGFILTER:
2263             {
2264                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
2265                 UINT msg = msgf->msg;
2266
2267                 // this is a bit crazy but richedit 1.0 sends us all mouse
2268                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
2269                 // generate the wxWin events for this message manually
2270                 //
2271                 // NB: in fact, this is still not totally correct as it does
2272                 //     send us WM_LBUTTONUP if the selection was cleared by the
2273                 //     last click -- so currently we get 2 events in this case,
2274                 //     but as I don't see any obvious way to check for this I
2275                 //     leave this code in place because it's still better than
2276                 //     not getting left up events at all
2277                 if ( msg == WM_LBUTTONUP )
2278                 {
2279                     WXUINT flags = msgf->wParam;
2280                     int x = GET_X_LPARAM(msgf->lParam),
2281                         y = GET_Y_LPARAM(msgf->lParam);
2282
2283                     HandleMouseEvent(msg, x, y, flags);
2284                 }
2285             }
2286
2287             // return true to process the event (and false to ignore it)
2288             return true;
2289
2290         case EN_LINK:
2291             {
2292                 const ENLINK *enlink = (ENLINK *)hdr;
2293
2294                 switch ( enlink->msg )
2295                 {
2296                     case WM_SETCURSOR:
2297                         // ok, so it is hardcoded - do we really nee to
2298                         // customize it?
2299                         {
2300                             wxCursor cur(wxCURSOR_HAND);
2301                             ::SetCursor(GetHcursorOf(cur));
2302                             *result = TRUE;
2303                             break;
2304                         }
2305
2306                     case WM_MOUSEMOVE:
2307                     case WM_LBUTTONDOWN:
2308                     case WM_LBUTTONUP:
2309                     case WM_LBUTTONDBLCLK:
2310                     case WM_RBUTTONDOWN:
2311                     case WM_RBUTTONUP:
2312                     case WM_RBUTTONDBLCLK:
2313                         // send a mouse event
2314                         {
2315                             static const wxEventType eventsMouse[] =
2316                             {
2317                                 wxEVT_MOTION,
2318                                 wxEVT_LEFT_DOWN,
2319                                 wxEVT_LEFT_UP,
2320                                 wxEVT_LEFT_DCLICK,
2321                                 wxEVT_RIGHT_DOWN,
2322                                 wxEVT_RIGHT_UP,
2323                                 wxEVT_RIGHT_DCLICK,
2324                             };
2325
2326                             // the event ids are consecutive
2327                             wxMouseEvent
2328                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
2329
2330                             InitMouseEvent(evtMouse,
2331                                            GET_X_LPARAM(enlink->lParam),
2332                                            GET_Y_LPARAM(enlink->lParam),
2333                                            enlink->wParam);
2334
2335                             wxTextUrlEvent event(m_windowId, evtMouse,
2336                                                  enlink->chrg.cpMin,
2337                                                  enlink->chrg.cpMax);
2338
2339                             InitCommandEvent(event);
2340
2341                             *result = ProcessCommand(event);
2342                         }
2343                         break;
2344                 }
2345             }
2346             return true;
2347     }
2348
2349     // not processed, leave it to the base class
2350     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
2351 }
2352
2353 // ----------------------------------------------------------------------------
2354 // colour setting for the rich edit controls
2355 // ----------------------------------------------------------------------------
2356
2357 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
2358 {
2359     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
2360     {
2361         // colour didn't really change
2362         return false;
2363     }
2364
2365     if ( IsRich() )
2366     {
2367         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
2368         // EM_SETBKGNDCOLOR additionally
2369         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
2370     }
2371
2372     return true;
2373 }
2374
2375 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
2376 {
2377     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
2378     {
2379         // colour didn't really change
2380         return false;
2381     }
2382
2383     if ( IsRich() )
2384     {
2385         // change the colour of everything
2386         CHARFORMAT cf;
2387         wxZeroMemory(cf);
2388         cf.cbSize = sizeof(cf);
2389         cf.dwMask = CFM_COLOR;
2390         cf.crTextColor = wxColourToRGB(colour);
2391         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
2392     }
2393
2394     return true;
2395 }
2396
2397 // ----------------------------------------------------------------------------
2398 // styling support for rich edit controls
2399 // ----------------------------------------------------------------------------
2400
2401 #if wxUSE_RICHEDIT
2402
2403 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2404 {
2405     if ( !IsRich() )
2406     {
2407         // can't do it with normal text control
2408         return false;
2409     }
2410
2411     // the richedit 1.0 doesn't handle setting background colour, so don't
2412     // even try to do anything if it's the only thing we want to change
2413     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
2414         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
2415         !style.HasTabs() )
2416     {
2417         // nothing to do: return true if there was really nothing to do and
2418         // false if we failed to set bg colour
2419         return !style.HasBackgroundColour();
2420     }
2421
2422     // order the range if needed
2423     if ( start > end )
2424     {
2425         long tmp = start;
2426         start = end;
2427         end = tmp;
2428     }
2429
2430     // we can only change the format of the selection, so select the range we
2431     // want and restore the old selection later
2432     long startOld, endOld;
2433     GetSelection(&startOld, &endOld);
2434
2435     // but do we really have to change the selection?
2436     bool changeSel = start != startOld || end != endOld;
2437
2438     if ( changeSel )
2439     {
2440         DoSetSelection(start, end, false /* don't scroll caret into view */);
2441     }
2442
2443     // initialize CHARFORMAT struct
2444 #if wxUSE_RICHEDIT2
2445     CHARFORMAT2 cf;
2446 #else
2447     CHARFORMAT cf;
2448 #endif
2449
2450     wxZeroMemory(cf);
2451
2452     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2453     // CHARFORMAT in that case
2454 #if wxUSE_RICHEDIT2
2455     if ( m_verRichEdit == 1 )
2456     {
2457         // this is the only thing the control is going to grok
2458         cf.cbSize = sizeof(CHARFORMAT);
2459     }
2460     else
2461 #endif
2462     {
2463         // CHARFORMAT or CHARFORMAT2
2464         cf.cbSize = sizeof(cf);
2465     }
2466
2467     if ( style.HasFont() )
2468     {
2469         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
2470         //     but using it doesn't seem to hurt neither so leaving it for now
2471
2472         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
2473                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
2474
2475         // fill in data from LOGFONT but recalculate lfHeight because we need
2476         // the real height in twips and not the negative number which
2477         // wxFillLogFont() returns (this is correct in general and works with
2478         // the Windows font mapper, but not here)
2479         LOGFONT lf;
2480         wxFillLogFont(&lf, &style.GetFont());
2481         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
2482         cf.bCharSet = lf.lfCharSet;
2483         cf.bPitchAndFamily = lf.lfPitchAndFamily;
2484         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
2485
2486         // also deal with underline/italic/bold attributes: note that we must
2487         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
2488         // style to allow clearing it
2489         if ( lf.lfItalic )
2490         {
2491             cf.dwEffects |= CFE_ITALIC;
2492         }
2493
2494         if ( lf.lfWeight == FW_BOLD )
2495         {
2496             cf.dwEffects |= CFE_BOLD;
2497         }
2498
2499         if ( lf.lfUnderline )
2500         {
2501             cf.dwEffects |= CFE_UNDERLINE;
2502         }
2503
2504         // strikeout fonts are not supported by wxWidgets
2505     }
2506
2507     if ( style.HasTextColour() )
2508     {
2509         cf.dwMask |= CFM_COLOR;
2510         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2511     }
2512
2513 #if wxUSE_RICHEDIT2
2514     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2515     {
2516         cf.dwMask |= CFM_BACKCOLOR;
2517         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2518     }
2519 #endif // wxUSE_RICHEDIT2
2520
2521     // do format the selection
2522     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
2523                             SCF_SELECTION, (LPARAM)&cf) != 0;
2524     if ( !ok )
2525     {
2526         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
2527     }
2528
2529     // now do the paragraph formatting
2530     PARAFORMAT2 pf;
2531     wxZeroMemory(pf);
2532     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2533     // PARAFORMAT in that case
2534 #if wxUSE_RICHEDIT2
2535     if ( m_verRichEdit == 1 )
2536     {
2537         // this is the only thing the control is going to grok
2538         pf.cbSize = sizeof(PARAFORMAT);
2539     }
2540     else
2541 #endif
2542     {
2543         // PARAFORMAT or PARAFORMAT2
2544         pf.cbSize = sizeof(pf);
2545     }
2546
2547     if (style.HasAlignment())
2548     {
2549         pf.dwMask |= PFM_ALIGNMENT;
2550         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2551             pf.wAlignment = PFA_RIGHT;
2552         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2553             pf.wAlignment = PFA_CENTER;
2554         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2555             pf.wAlignment = PFA_JUSTIFY;
2556         else
2557             pf.wAlignment = PFA_LEFT;
2558     }
2559
2560     if (style.HasLeftIndent())
2561     {
2562         pf.dwMask |= PFM_STARTINDENT | PFM_OFFSET;
2563
2564         // Convert from 1/10 mm to TWIPS
2565         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2566         pf.dxOffset = (int) (((double) style.GetLeftSubIndent()) * mm2twips / 10.0) ;
2567     }
2568
2569     if (style.HasRightIndent())
2570     {
2571         pf.dwMask |= PFM_RIGHTINDENT;
2572
2573         // Convert from 1/10 mm to TWIPS
2574         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2575     }
2576
2577     if (style.HasTabs())
2578     {
2579         pf.dwMask |= PFM_TABSTOPS;
2580
2581         const wxArrayInt& tabs = style.GetTabs();
2582
2583         pf.cTabCount = (SHORT)wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2584         size_t i;
2585         for (i = 0; i < (size_t) pf.cTabCount; i++)
2586         {
2587             // Convert from 1/10 mm to TWIPS
2588             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2589         }
2590     }
2591
2592 #if wxUSE_RICHEDIT2
2593     if ( m_verRichEdit > 1 )
2594     {
2595         if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft )
2596         {
2597             // Use RTL paragraphs in RTL mode to get proper layout
2598             pf.dwMask |= PFM_RTLPARA;
2599             pf.wEffects |= PFE_RTLPARA;
2600         }
2601     }
2602 #endif // wxUSE_RICHEDIT2
2603
2604     if ( pf.dwMask )
2605     {
2606         // do format the selection
2607         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2608                                 0, (LPARAM) &pf) != 0;
2609         if ( !ok )
2610         {
2611             wxLogDebug(_T("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2612         }
2613     }
2614
2615     if ( changeSel )
2616     {
2617         // restore the original selection
2618         DoSetSelection(startOld, endOld, false);
2619     }
2620
2621     return ok;
2622 }
2623
2624 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2625 {
2626     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2627         return false;
2628
2629     if ( IsEditable() )
2630     {
2631         // we have to do this or the style wouldn't apply for the text typed by
2632         // the user
2633         wxTextPos posLast = GetLastPosition();
2634         SetStyle(posLast, posLast, m_defaultStyle);
2635     }
2636
2637     return true;
2638 }
2639
2640 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2641 {
2642     if ( !IsRich() )
2643     {
2644         // can't do it with normal text control
2645         return false;
2646     }
2647
2648     // initialize CHARFORMAT struct
2649 #if wxUSE_RICHEDIT2
2650     CHARFORMAT2 cf;
2651 #else
2652     CHARFORMAT cf;
2653 #endif
2654
2655     wxZeroMemory(cf);
2656
2657     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2658     // CHARFORMAT in that case
2659 #if wxUSE_RICHEDIT2
2660     if ( m_verRichEdit == 1 )
2661     {
2662         // this is the only thing the control is going to grok
2663         cf.cbSize = sizeof(CHARFORMAT);
2664     }
2665     else
2666 #endif
2667     {
2668         // CHARFORMAT or CHARFORMAT2
2669         cf.cbSize = sizeof(cf);
2670     }
2671     // we can only change the format of the selection, so select the range we
2672     // want and restore the old selection later
2673     long startOld, endOld;
2674     GetSelection(&startOld, &endOld);
2675
2676     // but do we really have to change the selection?
2677     bool changeSel = position != startOld || position != endOld;
2678
2679     if ( changeSel )
2680     {
2681         DoSetSelection(position, position+1, false /* don't scroll caret into view */);
2682     }
2683
2684     // get the selection formatting
2685     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2686                             SCF_SELECTION, (LPARAM)&cf) ;
2687
2688
2689     LOGFONT lf;
2690     lf.lfHeight = cf.yHeight;
2691     lf.lfWidth = 0;
2692     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2693     lf.lfClipPrecision = 0;
2694     lf.lfEscapement = 0;
2695     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2696
2697     //NOTE:  we _MUST_ set each of these values to _something_ since we
2698     //do not call wxZeroMemory on the LOGFONT lf
2699     if (cf.dwEffects & CFE_ITALIC)
2700         lf.lfItalic = TRUE;
2701     else
2702         lf.lfItalic = FALSE;
2703
2704     lf.lfOrientation = 0;
2705     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2706     lf.lfQuality = 0;
2707
2708     if (cf.dwEffects & CFE_STRIKEOUT)
2709         lf.lfStrikeOut = TRUE;
2710     else
2711         lf.lfStrikeOut = FALSE;
2712
2713     if (cf.dwEffects & CFE_UNDERLINE)
2714         lf.lfUnderline = TRUE;
2715     else
2716         lf.lfUnderline = FALSE;
2717
2718     if (cf.dwEffects & CFE_BOLD)
2719         lf.lfWeight = FW_BOLD;
2720     else
2721         lf.lfWeight = FW_NORMAL;
2722
2723     wxFont font = wxCreateFontFromLogFont(& lf);
2724     if (font.Ok())
2725     {
2726         style.SetFont(font);
2727     }
2728     style.SetTextColour(wxColour(cf.crTextColor));
2729
2730 #if wxUSE_RICHEDIT2
2731     if ( m_verRichEdit != 1 )
2732     {
2733         // cf.dwMask |= CFM_BACKCOLOR;
2734         style.SetBackgroundColour(wxColour(cf.crBackColor));
2735     }
2736 #endif // wxUSE_RICHEDIT2
2737
2738     // now get the paragraph formatting
2739     PARAFORMAT2 pf;
2740     wxZeroMemory(pf);
2741     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2742     // PARAFORMAT in that case
2743 #if wxUSE_RICHEDIT2
2744     if ( m_verRichEdit == 1 )
2745     {
2746         // this is the only thing the control is going to grok
2747         pf.cbSize = sizeof(PARAFORMAT);
2748     }
2749     else
2750 #endif
2751     {
2752         // PARAFORMAT or PARAFORMAT2
2753         pf.cbSize = sizeof(pf);
2754     }
2755
2756     // do format the selection
2757     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2758
2759     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0), (int) ((double) pf.dxOffset * twips2mm * 10.0) );
2760     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2761
2762     if (pf.wAlignment == PFA_CENTER)
2763         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2764     else if (pf.wAlignment == PFA_RIGHT)
2765         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2766     else if (pf.wAlignment == PFA_JUSTIFY)
2767         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2768     else
2769         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2770
2771     wxArrayInt tabStops;
2772     size_t i;
2773     for (i = 0; i < (size_t) pf.cTabCount; i++)
2774     {
2775         tabStops.Add( (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) );
2776     }
2777
2778     if ( changeSel )
2779     {
2780         // restore the original selection
2781         DoSetSelection(startOld, endOld, false);
2782     }
2783
2784     return true;
2785 }
2786
2787 #endif
2788
2789 // ----------------------------------------------------------------------------
2790 // wxRichEditModule
2791 // ----------------------------------------------------------------------------
2792
2793 static const HINSTANCE INVALID_HINSTANCE = (HINSTANCE)-1;
2794
2795 bool wxRichEditModule::OnInit()
2796 {
2797     // don't do anything - we will load it when needed
2798     return true;
2799 }
2800
2801 void wxRichEditModule::OnExit()
2802 {
2803     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2804     {
2805         if ( ms_hRichEdit[i] && ms_hRichEdit[i] != INVALID_HINSTANCE )
2806         {
2807             ::FreeLibrary(ms_hRichEdit[i]);
2808             ms_hRichEdit[i] = NULL;
2809         }
2810     }
2811 #if wxUSE_INKEDIT
2812     if (ms_inkEditLib.IsLoaded())
2813         ms_inkEditLib.Unload();
2814 #endif
2815 }
2816
2817 /* static */
2818 bool wxRichEditModule::Load(Version version)
2819 {
2820     if ( ms_hRichEdit[version] == INVALID_HINSTANCE )
2821     {
2822         // we had already tried to load it and failed
2823         return false;
2824     }
2825
2826     if ( ms_hRichEdit[version] )
2827     {
2828         // we've already got this one
2829         return true;
2830     }
2831
2832     static const wxChar *dllnames[] =
2833     {
2834         _T("riched32"),
2835         _T("riched20"),
2836         _T("msftedit"),
2837     };
2838
2839     wxCOMPILE_TIME_ASSERT( WXSIZEOF(dllnames) == Version_Max,
2840                             RichEditDllNamesVersionsMismatch );
2841
2842     ms_hRichEdit[version] = ::LoadLibrary(dllnames[version]);
2843
2844     if ( !ms_hRichEdit[version] )
2845     {
2846         ms_hRichEdit[version] = INVALID_HINSTANCE;
2847
2848         return false;
2849     }
2850
2851     return true;
2852 }
2853
2854 #if wxUSE_INKEDIT
2855 // load the InkEdit library
2856 bool wxRichEditModule::LoadInkEdit()
2857 {
2858     static wxDynamicLibrary ms_inkEditLib;
2859     static bool             ms_inkEditLibLoadAttemped;
2860     if (ms_inkEditLibLoadAttemped)
2861         ms_inkEditLib.IsLoaded();
2862
2863     ms_inkEditLibLoadAttemped = true;
2864
2865     wxLogNull logNull;
2866     return ms_inkEditLib.Load(wxT("inked"));
2867 }
2868 #endif
2869
2870
2871 #endif // wxUSE_RICHEDIT
2872
2873 #endif // wxUSE_TEXTCTRL && !(__SMARTPHONE__ && __WXWINCE__)