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     #include "wx/wxcrtvararg.h"
  41 #endif
  42
  43 #include "wx/sysopt.h"
  44
  45 #if wxUSE_CLIPBOARD
  46     #include "wx/clipbrd.h"
  47 #endif
  48
  49 #include "wx/textfile.h"
  50
  51 #include <windowsx.h>
  52
  53 #include "wx/msw/private.h"
  54 #include "wx/msw/winundef.h"
  55 #include "wx/msw/mslu.h"
  56
  57 #include <string.h>
  58 #include <stdlib.h>
  59
  60 #ifndef __WXWINCE__
  61 #include <sys/types.h>
  62 #endif
  63
  64 #if wxUSE_RICHEDIT
  65
  66 #if wxUSE_INKEDIT
  67 #include "wx/dynlib.h"
  68 #endif
  69
  70 // old mingw32 has richedit stuff directly in windows.h and doesn't have
  71 // richedit.h at all
  72 #if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__)
  73     #include <richedit.h>
  74 #endif
  75
  76 #endif // wxUSE_RICHEDIT
  77
  78 #include "wx/msw/missing.h"
  79
  80 #if wxUSE_DRAG_AND_DROP && wxUSE_RICHEDIT
  81
  82 // dummy value used for m_dropTarget, different from any valid pointer value
  83 // (which are all even under Windows) and NULL
  84 static wxDropTarget *
  85     wxRICHTEXT_DEFAULT_DROPTARGET = reinterpret_cast<wxDropTarget *>(1);
  86
  87 #endif // wxUSE_DRAG_AND_DROP && wxUSE_RICHEDIT
  88
  89 // ----------------------------------------------------------------------------
  90 // private classes
  91 // ----------------------------------------------------------------------------
  92
  93 #if wxUSE_RICHEDIT
  94
  95 // this module initializes RichEdit DLL(s) if needed
  96 class wxRichEditModule : public wxModule
  97 {
  98 public:
  99     enum Version
 100     {
 101         Version_1,          // riched32.dll
 102         Version_2or3,       // both use riched20.dll
 103         Version_41,         // msftedit.dll (XP SP1 and Windows 2003)
 104         Version_Max
 105     };
 106
 107     virtual bool OnInit();
 108     virtual void OnExit();
 109
 110     // load the richedit DLL for the specified version of rich edit
 111     static bool Load(Version version);
 112
 113 #if wxUSE_INKEDIT
 114     // load the InkEdit library
 115     static bool LoadInkEdit();
 116 #endif
 117
 118 private:
 119     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
 120     static HINSTANCE ms_hRichEdit[Version_Max];
 121
 122 #if wxUSE_INKEDIT
 123     static wxDynamicLibrary ms_inkEditLib;
 124     static bool             ms_inkEditLibLoadAttemped;
 125 #endif
 126
 127     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 128 };
 129
 130 HINSTANCE wxRichEditModule::ms_hRichEdit[Version_Max] = { NULL, NULL, NULL };
 131
 132 #if wxUSE_INKEDIT
 133 wxDynamicLibrary wxRichEditModule::ms_inkEditLib;
 134 bool             wxRichEditModule::ms_inkEditLibLoadAttemped = false;
 135 #endif
 136
 137 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 138
 139 #endif // wxUSE_RICHEDIT
 140
 141 // a small class used to set m_updatesCount to 0 (to filter duplicate events if
 142 // necessary) and to reset it back to -1 afterwards
 143 class UpdatesCountFilter
 144 {
 145 public:
 146     UpdatesCountFilter(int& count)
 147         : m_count(count)
 148     {
 149         wxASSERT_MSG( m_count == -1 || m_count == -2,
 150                       wxT("wrong initial m_updatesCount value") );
 151
 152         if (m_count != -2)
 153             m_count = 0;
 154         //else: we don't want to count how many update events we get as we're going
 155         //      to ignore all of them
 156     }
 157
 158     ~UpdatesCountFilter()
 159     {
 160         m_count = -1;
 161     }
 162
 163     // return true if an event has been received
 164     bool GotUpdate() const
 165     {
 166         return m_count == 1;
 167     }
 168
 169 private:
 170     int& m_count;
 171
 172     wxDECLARE_NO_COPY_CLASS(UpdatesCountFilter);
 173 };
 174
 175 // ----------------------------------------------------------------------------
 176 // event tables and other macros
 177 // ----------------------------------------------------------------------------
 178
 179 #if wxUSE_EXTENDED_RTTI
 180 WX_DEFINE_FLAGS( wxTextCtrlStyle )
 181
 182 wxBEGIN_FLAGS( wxTextCtrlStyle )
 183     // new style border flags, we put them first to
 184     // use them for streaming out
 185     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
 186     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
 187     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
 188     wxFLAGS_MEMBER(wxBORDER_RAISED)
 189     wxFLAGS_MEMBER(wxBORDER_STATIC)
 190     wxFLAGS_MEMBER(wxBORDER_NONE)
 191
 192     // old style border flags
 193     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
 194     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
 195     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
 196     wxFLAGS_MEMBER(wxRAISED_BORDER)
 197     wxFLAGS_MEMBER(wxSTATIC_BORDER)
 198     wxFLAGS_MEMBER(wxBORDER)
 199
 200     // standard window styles
 201     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
 202     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
 203     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
 204     wxFLAGS_MEMBER(wxWANTS_CHARS)
 205     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
 206     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
 207     wxFLAGS_MEMBER(wxVSCROLL)
 208     wxFLAGS_MEMBER(wxHSCROLL)
 209
 210     wxFLAGS_MEMBER(wxTE_PROCESS_ENTER)
 211     wxFLAGS_MEMBER(wxTE_PROCESS_TAB)
 212     wxFLAGS_MEMBER(wxTE_MULTILINE)
 213     wxFLAGS_MEMBER(wxTE_PASSWORD)
 214     wxFLAGS_MEMBER(wxTE_READONLY)
 215     wxFLAGS_MEMBER(wxHSCROLL)
 216     wxFLAGS_MEMBER(wxTE_RICH)
 217     wxFLAGS_MEMBER(wxTE_RICH2)
 218     wxFLAGS_MEMBER(wxTE_AUTO_URL)
 219     wxFLAGS_MEMBER(wxTE_NOHIDESEL)
 220     wxFLAGS_MEMBER(wxTE_LEFT)
 221     wxFLAGS_MEMBER(wxTE_CENTRE)
 222     wxFLAGS_MEMBER(wxTE_RIGHT)
 223     wxFLAGS_MEMBER(wxTE_DONTWRAP)
 224     wxFLAGS_MEMBER(wxTE_CHARWRAP)
 225     wxFLAGS_MEMBER(wxTE_WORDWRAP)
 226
 227 wxEND_FLAGS( wxTextCtrlStyle )
 228
 229 IMPLEMENT_DYNAMIC_CLASS_XTI(wxTextCtrl, wxControl,"wx/textctrl.h")
 230
 231 wxBEGIN_PROPERTIES_TABLE(wxTextCtrl)
 232     wxEVENT_PROPERTY( TextUpdated , wxEVT_COMMAND_TEXT_UPDATED , wxCommandEvent )
 233     wxEVENT_PROPERTY( TextEnter , wxEVT_COMMAND_TEXT_ENTER , wxCommandEvent )
 234
 235     wxPROPERTY( Font , wxFont , SetFont , GetFont  , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 236     wxPROPERTY( Value , wxString , SetValue, GetValue, wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 237     wxPROPERTY_FLAGS( WindowStyle , wxTextCtrlStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 238 wxEND_PROPERTIES_TABLE()
 239
 240 wxBEGIN_HANDLERS_TABLE(wxTextCtrl)
 241 wxEND_HANDLERS_TABLE()
 242
 243 wxCONSTRUCTOR_6( wxTextCtrl , wxWindow* , Parent , wxWindowID , Id , wxString , Value , wxPoint , Position , wxSize , Size , long , WindowStyle)
 244 #else
 245 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxTextCtrlBase)
 246 #endif
 247
 248
 249 BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
 250     EVT_CHAR(wxTextCtrl::OnChar)
 251     EVT_KEY_DOWN(wxTextCtrl::OnKeyDown)
 252     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 253
 254 #if wxUSE_RICHEDIT
 255     EVT_CONTEXT_MENU(wxTextCtrl::OnContextMenu)
 256 #endif
 257
 258     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 259     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 260     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 261     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 262     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 263     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 264     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 265
 266     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 267     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 268     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 269     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 270     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 271     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 272     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 273
 274     EVT_SET_FOCUS(wxTextCtrl::OnSetFocus)
 275 END_EVENT_TABLE()
 276
 277 // ============================================================================
 278 // implementation
 279 // ============================================================================
 280
 281 // ----------------------------------------------------------------------------
 282 // creation
 283 // ----------------------------------------------------------------------------
 284
 285 void wxTextCtrl::Init()
 286 {
 287 #if wxUSE_RICHEDIT
 288     m_verRichEdit = 0;
 289 #endif // wxUSE_RICHEDIT
 290
 291 #if wxUSE_INKEDIT && wxUSE_RICHEDIT
 292     m_isInkEdit = 0;
 293 #endif
 294
 295     m_privateContextMenu = NULL;
 296     m_updatesCount = -1;
 297     m_isNativeCaretShown = true;
 298 }
 299
 300 wxTextCtrl::~wxTextCtrl()
 301 {
 302 #if wxUSE_DRAG_AND_DROP && wxUSE_RICHEDIT
 303     if ( m_dropTarget == wxRICHTEXT_DEFAULT_DROPTARGET )
 304     {
 305         // don't try to destroy this dummy pointer in the base class dtor
 306         m_dropTarget = NULL;
 307     }
 308 #endif // wxUSE_DRAG_AND_DROP && wxUSE_RICHEDIT
 309
 310     delete m_privateContextMenu;
 311 }
 312
 313 bool wxTextCtrl::Create(wxWindow *parent,
 314                         wxWindowID id,
 315                         const wxString& value,
 316                         const wxPoint& pos,
 317                         const wxSize& size,
 318                         long style,
 319                         const wxValidator& validator,
 320                         const wxString& name)
 321 {
 322     // base initialization
 323     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 324         return false;
 325
 326     if ( !MSWCreateText(value, pos, size) )
 327         return false;
 328
 329 #if wxUSE_DRAG_AND_DROP && wxUSE_RICHEDIT
 330     if ( IsRich() )
 331     {
 332         // rich text controls have a default associated drop target which
 333         // allows them to receive (rich) text dropped on them, which is nice,
 334         // but prevents us from associating a user-defined drop target with
 335         // them as we need to unregister the old one first
 336         //
 337         // to make it work, we set m_dropTarget to this special value initially
 338         // and check for it in our SetDropTarget()
 339         m_dropTarget = wxRICHTEXT_DEFAULT_DROPTARGET;
 340     }
 341 #endif // wxUSE_DRAG_AND_DROP && wxUSE_RICHEDIT
 342
 343     return true;
 344 }
 345
 346 // returns true if the platform should explicitly apply a theme border
 347 bool wxTextCtrl::CanApplyThemeBorder() const
 348 {
 349 #ifdef __WXWINCE__
 350     return false;
 351 #else
 352     // Standard text control already handles theming
 353     return ((GetWindowStyle() & (wxTE_RICH|wxTE_RICH2)) != 0);
 354 #endif
 355 }
 356
 357 bool wxTextCtrl::MSWCreateText(const wxString& value,
 358                                const wxPoint& pos,
 359                                const wxSize& size)
 360 {
 361     // translate wxWin style flags to MSW ones
 362     WXDWORD msStyle = MSWGetCreateWindowFlags();
 363
 364     // do create the control - either an EDIT or RICHEDIT
 365     wxString windowClass = wxT("EDIT");
 366
 367 #if defined(__POCKETPC__) || defined(__SMARTPHONE__)
 368     // A control that capitalizes the first letter
 369     if ( HasFlag(wxTE_CAPITALIZE) )
 370         windowClass = wxT("CAPEDIT");
 371 #endif
 372
 373 #if wxUSE_RICHEDIT
 374     if ( m_windowStyle & wxTE_AUTO_URL )
 375     {
 376         // automatic URL detection only works in RichEdit 2.0+
 377         m_windowStyle |= wxTE_RICH2;
 378     }
 379
 380     if ( m_windowStyle & wxTE_RICH2 )
 381     {
 382         // using richedit 2.0 implies using wxTE_RICH
 383         m_windowStyle |= wxTE_RICH;
 384     }
 385
 386     // we need to load the richedit DLL before creating the rich edit control
 387     if ( m_windowStyle & wxTE_RICH )
 388     {
 389         // versions 2.0, 3.0 and 4.1 of rich edit are mostly compatible with
 390         // each other but not with version 1.0, so we have separate flags for
 391         // the version 1.0 and the others (and so m_verRichEdit may be 0 (plain
 392         // EDIT control), 1 for version 1.0 or 2 for any higher version)
 393         //
 394         // notice that 1.0 has no Unicode support at all so in Unicode build we
 395         // must use another version
 396
 397 #if wxUSE_UNICODE
 398         m_verRichEdit = 2;
 399 #else // !wxUSE_UNICODE
 400         m_verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 401 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 402
 403 #if wxUSE_INKEDIT
 404         // First test if we can load an ink edit control. Normally, all edit
 405         // controls will be made ink edit controls if a tablet environment is
 406         // found (or if msw.inkedit != 0 and the InkEd.dll is present).
 407         // However, an application can veto ink edit controls by either specifying
 408         // msw.inkedit = 0 or by removing wxTE_RICH[2] from the style.
 409         //
 410         if ((wxSystemSettings::HasFeature(wxSYS_TABLET_PRESENT) || wxSystemOptions::GetOptionInt(wxT("msw.inkedit")) != 0) &&
 411             !(wxSystemOptions::HasOption(wxT("msw.inkedit")) && wxSystemOptions::GetOptionInt(wxT("msw.inkedit")) == 0))
 412         {
 413             if (wxRichEditModule::LoadInkEdit())
 414             {
 415                 windowClass = INKEDIT_CLASS;
 416
 417 #if wxUSE_INKEDIT && wxUSE_RICHEDIT
 418                 m_isInkEdit = 1;
 419 #endif
 420
 421                 // Fake rich text version for other calls
 422                 m_verRichEdit = 2;
 423             }
 424         }
 425 #endif
 426
 427 #if wxUSE_INKEDIT
 428         if (!IsInkEdit())
 429 #endif // wxUSE_INKEDIT
 430         {
 431             if ( m_verRichEdit == 2 )
 432             {
 433                 if ( wxRichEditModule::Load(wxRichEditModule::Version_41) )
 434                 {
 435                     // yes, class name for version 4.1 really is 5.0
 436                     windowClass = wxT("RICHEDIT50W");
 437                 }
 438                 else if ( wxRichEditModule::Load(wxRichEditModule::Version_2or3) )
 439                 {
 440                     windowClass = wxT("RichEdit20")
 441 #if wxUSE_UNICODE
 442                                 wxT("W");
 443 #else // ANSI
 444                                 wxT("A");
 445 #endif // Unicode/ANSI
 446                 }
 447                 else // failed to load msftedit.dll and riched20.dll
 448                 {
 449                     m_verRichEdit = 1;
 450                 }
 451             }
 452
 453             if ( m_verRichEdit == 1 )
 454             {
 455                 if ( wxRichEditModule::Load(wxRichEditModule::Version_1) )
 456                 {
 457                     windowClass = wxT("RICHEDIT");
 458                 }
 459                 else // failed to load any richedit control DLL
 460                 {
 461                     // only give the error msg once if the DLL can't be loaded
 462                     static bool s_errorGiven = false; // MT ok as only used by GUI
 463
 464                     if ( !s_errorGiven )
 465                     {
 466                         wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 467
 468                         s_errorGiven = true;
 469                     }
 470
 471                     m_verRichEdit = 0;
 472                 }
 473             }
 474         } // !useInkEdit
 475     }
 476 #endif // wxUSE_RICHEDIT
 477
 478     // we need to turn '\n's into "\r\n"s for the multiline controls
 479     wxString valueWin;
 480     if ( m_windowStyle & wxTE_MULTILINE )
 481     {
 482         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 483     }
 484     else // single line
 485     {
 486         valueWin = value;
 487     }
 488
 489     // suppress events sent during control creation: we're called either from
 490     // the ctor and then we shouldn't generate any events for compatibility
 491     // with the other ports, or from SetWindowStyleFlag() and then we shouldn't
 492     // generate the events because our text doesn't really change, the fact
 493     // that we (sometimes) need to recreate the control is just an
 494     // implementation detail
 495     m_updatesCount = -2;
 496
 497     if ( !MSWCreateControl(windowClass.wx_str(), msStyle, pos, size, valueWin) )
 498         return false;
 499
 500     m_updatesCount = -1;
 501
 502 #if wxUSE_RICHEDIT
 503     if (IsRich())
 504     {
 505 #if wxUSE_INKEDIT
 506         if (IsInkEdit())
 507         {
 508             // Pass IEM_InsertText (0) as wParam, in order to have the ink always
 509             // converted to text.
 510             ::SendMessage(GetHwnd(), EM_SETINKINSERTMODE, 0, 0);
 511
 512             // Make sure the mouse can be used for input
 513             ::SendMessage(GetHwnd(), EM_SETUSEMOUSEFORINPUT, 1, 0);
 514         }
 515 #endif
 516
 517         // enable the events we're interested in: we want to get EN_CHANGE as
 518         // for the normal controls
 519         LPARAM mask = ENM_CHANGE;
 520
 521         if (GetRichVersion() == 1 && !IsInkEdit())
 522         {
 523             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 524             // explained in its handler
 525            mask |= ENM_MOUSEEVENTS;
 526
 527            // we also need to force the appearance of the vertical scrollbar
 528            // initially as otherwise the control doesn't refresh correctly
 529            // after resize: but once the vertical scrollbar had been shown
 530            // (even if it's subsequently hidden) it does
 531            //
 532            // this is clearly a bug and for now it has been only noticed under
 533            // Windows XP, so if we're sure it works correctly under other
 534            // systems we could do this only for XP
 535            SetSize(-1, 1); // 1 is small enough to force vert scrollbar
 536            SetInitialSize(size);
 537         }
 538         else if ( m_windowStyle & wxTE_AUTO_URL )
 539         {
 540             mask |= ENM_LINK;
 541
 542             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 543         }
 544
 545         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 546     }
 547     else
 548 #endif // wxUSE_RICHEDIT
 549     if ( HasFlag(wxTE_MULTILINE) && HasFlag(wxTE_READONLY) )
 550     {
 551         // non-rich read-only multiline controls have grey background by
 552         // default under MSW but this is not always appropriate, so forcefully
 553         // reset the background colour to normal default
 554         //
 555         // this is not ideal but, after a long discussion on wx-dev (see
 556         // http://thread.gmane.org/gmane.comp.lib.wxwidgets.devel/116360/) it
 557         // was finally deemed to be the best behaviour by default (and ideally
 558         // we'd have a way to change this, see #11521)
 559         SetBackgroundColour(GetClassDefaultAttributes().colBg);
 560     }
 561
 562 #ifndef __WXWINCE__
 563     // Without this, if we pass the size in the constructor and then don't change it,
 564     // the themed borders will be drawn incorrectly.
 565     SetWindowPos(GetHwnd(), NULL, 0, 0, 0, 0,
 566                 SWP_NOZORDER|SWP_NOMOVE|SWP_NOSIZE|SWP_NOACTIVATE|
 567                 SWP_FRAMECHANGED);
 568 #endif
 569
 570     return true;
 571 }
 572
 573 // Make sure the window style (etc.) reflects the HWND style (roughly)
 574 void wxTextCtrl::AdoptAttributesFromHWND()
 575 {
 576     wxWindow::AdoptAttributesFromHWND();
 577
 578     HWND hWnd = GetHwnd();
 579     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 580
 581     // retrieve the style to see whether this is an edit or richedit ctrl
 582 #if wxUSE_RICHEDIT
 583     wxString classname = wxGetWindowClass(GetHWND());
 584
 585     if ( classname.IsSameAs(wxT("EDIT"), false /* no case */) )
 586     {
 587         m_verRichEdit = 0;
 588     }
 589     else // rich edit?
 590     {
 591         wxChar c;
 592         if ( wxSscanf(classname, wxT("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 593         {
 594             wxLogDebug(wxT("Unknown edit control '%s'."), classname.c_str());
 595
 596             m_verRichEdit = 0;
 597         }
 598     }
 599 #endif // wxUSE_RICHEDIT
 600
 601     if (style & ES_MULTILINE)
 602         m_windowStyle |= wxTE_MULTILINE;
 603     if (style & ES_PASSWORD)
 604         m_windowStyle |= wxTE_PASSWORD;
 605     if (style & ES_READONLY)
 606         m_windowStyle |= wxTE_READONLY;
 607     if (style & ES_WANTRETURN)
 608         m_windowStyle |= wxTE_PROCESS_ENTER;
 609     if (style & ES_CENTER)
 610         m_windowStyle |= wxTE_CENTRE;
 611     if (style & ES_RIGHT)
 612         m_windowStyle |= wxTE_RIGHT;
 613 }
 614
 615 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 616 {
 617     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 618
 619     // styles which we always add by default
 620     if ( style & wxTE_MULTILINE )
 621     {
 622         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 623         if ( !(style & wxTE_NO_VSCROLL) )
 624         {
 625             // always adjust the vertical scrollbar automatically if we have it
 626             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 627
 628 #if wxUSE_RICHEDIT
 629             // we have to use this style for the rich edit controls because
 630             // without it the vertical scrollbar never appears at all in
 631             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 632             if ( style & wxTE_RICH2 )
 633             {
 634                 msStyle |= ES_DISABLENOSCROLL;
 635             }
 636 #endif // wxUSE_RICHEDIT
 637         }
 638
 639         style |= wxTE_PROCESS_ENTER;
 640     }
 641     else // !multiline
 642     {
 643         // there is really no reason to not have this style for single line
 644         // text controls
 645         msStyle |= ES_AUTOHSCROLL;
 646     }
 647
 648     // note that wxTE_DONTWRAP is the same as wxHSCROLL so if we have a horz
 649     // scrollbar, there is no wrapping -- which makes sense
 650     if ( style & wxTE_DONTWRAP )
 651     {
 652         // automatically scroll the control horizontally as necessary
 653         //
 654         // NB: ES_AUTOHSCROLL is needed for richedit controls or they don't
 655         //     show horz scrollbar at all, even in spite of WS_HSCROLL, and as
 656         //     it doesn't seem to do any harm for plain edit controls, add it
 657         //     always
 658         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 659     }
 660
 661     if ( style & wxTE_READONLY )
 662         msStyle |= ES_READONLY;
 663
 664     if ( style & wxTE_PASSWORD )
 665         msStyle |= ES_PASSWORD;
 666
 667     if ( style & wxTE_NOHIDESEL )
 668         msStyle |= ES_NOHIDESEL;
 669
 670     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 671     if ( style & wxTE_CENTRE )
 672         msStyle |= ES_CENTER;
 673     else if ( style & wxTE_RIGHT )
 674         msStyle |= ES_RIGHT;
 675     else
 676         msStyle |= ES_LEFT; // ES_LEFT is 0 as well but for consistency...
 677
 678     return msStyle;
 679 }
 680
 681 void wxTextCtrl::SetWindowStyleFlag(long style)
 682 {
 683     // changing the alignment of the control dynamically works under Win2003
 684     // (but not older Windows version: it seems to work under some versions of
 685     // XP but not other ones, and we have no way to determine it so be
 686     // conservative here) and only for plain EDIT controls (not RICH ones) and
 687     // we have to recreate the control to make it always work
 688     if ( IsRich() || wxGetWinVersion() < wxWinVersion_2003 )
 689     {
 690         const long alignMask = wxTE_LEFT | wxTE_CENTRE | wxTE_RIGHT;
 691         if ( (style & alignMask) != (GetWindowStyle() & alignMask) )
 692         {
 693             const wxString value = GetValue();
 694             const wxPoint pos = GetPosition();
 695             const wxSize size = GetSize();
 696
 697             // delete the old window
 698             HWND hwnd = GetHwnd();
 699             DissociateHandle();
 700             ::DestroyWindow(hwnd);
 701
 702             // create the new one with the updated flags
 703             m_windowStyle = style;
 704             MSWCreateText(value, pos, size);
 705
 706             // and make sure it has the same attributes as before
 707             if ( m_hasFont )
 708             {
 709                 // calling SetFont(m_font) would do nothing as the code would
 710                 // notice that the font didn't change, so force it to believe
 711                 // that it did
 712                 wxFont font = m_font;
 713                 m_font = wxNullFont;
 714                 SetFont(font);
 715             }
 716
 717             if ( m_hasFgCol )
 718             {
 719                 wxColour colFg = m_foregroundColour;
 720                 m_foregroundColour = wxNullColour;
 721                 SetForegroundColour(colFg);
 722             }
 723
 724             if ( m_hasBgCol )
 725             {
 726                 wxColour colBg = m_backgroundColour;
 727                 m_backgroundColour = wxNullColour;
 728                 SetBackgroundColour(colBg);
 729             }
 730
 731             // note that text styles are lost but this is probably not a big
 732             // problem: if you use styles, you probably don't use nor change
 733             // alignment flags anyhow
 734
 735             return;
 736         }
 737     }
 738
 739 #if wxUSE_RICHEDIT
 740     // we have to deal with some styles separately because they can't be
 741     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 742     // using richedit-specific EM_SETOPTIONS
 743     if ( IsRich() &&
 744             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 745     {
 746         bool set = (style & wxTE_NOHIDESEL) != 0;
 747
 748         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 749                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 750     }
 751 #endif // wxUSE_RICHEDIT
 752
 753     wxControl::SetWindowStyleFlag(style);
 754 }
 755
 756 // ----------------------------------------------------------------------------
 757 // set/get the controls text
 758 // ----------------------------------------------------------------------------
 759
 760 bool wxTextCtrl::IsEmpty() const
 761 {
 762     // this is an optimization for multiline controls containing a lot of text
 763     if ( IsMultiLine() && GetNumberOfLines() != 1 )
 764         return false;
 765
 766     return wxTextCtrlBase::IsEmpty();
 767 }
 768
 769 wxString wxTextCtrl::GetValue() const
 770 {
 771     // range 0..-1 is special for GetRange() and means to retrieve all text
 772     return GetRange(0, -1);
 773 }
 774
 775 wxString wxTextCtrl::GetRange(long from, long to) const
 776 {
 777     wxString str;
 778
 779     if ( from >= to && to != -1 )
 780     {
 781         // nothing to retrieve
 782         return str;
 783     }
 784
 785 #if wxUSE_RICHEDIT
 786     if ( IsRich() )
 787     {
 788         int len = GetWindowTextLength(GetHwnd());
 789         if ( len > from )
 790         {
 791             if ( to == -1 )
 792                 to = len;
 793
 794 #if !wxUSE_UNICODE
 795             // we must use EM_STREAMOUT if we don't want to lose all characters
 796             // not representable in the current character set (EM_GETTEXTRANGE
 797             // simply replaces them with question marks...)
 798             if ( GetRichVersion() > 1 )
 799             {
 800                 // we must have some encoding, otherwise any 8bit chars in the
 801                 // control are simply *lost* (replaced by '?')
 802                 wxFontEncoding encoding = wxFONTENCODING_SYSTEM;
 803
 804                 wxFont font = m_defaultStyle.GetFont();
 805                 if ( !font.Ok() )
 806                     font = GetFont();
 807
 808                 if ( font.Ok() )
 809                 {
 810                    encoding = font.GetEncoding();
 811                 }
 812
 813 #if wxUSE_INTL
 814                 if ( encoding == wxFONTENCODING_SYSTEM )
 815                 {
 816                     encoding = wxLocale::GetSystemEncoding();
 817                 }
 818 #endif // wxUSE_INTL
 819
 820                 if ( encoding == wxFONTENCODING_SYSTEM )
 821                 {
 822                     encoding = wxFONTENCODING_ISO8859_1;
 823                 }
 824
 825                 str = StreamOut(encoding);
 826
 827                 if ( !str.empty() )
 828                 {
 829                     // we have to manually extract the required part, luckily
 830                     // this is easy in this case as EOL characters in str are
 831                     // just LFs because we remove CRs in wxRichEditStreamOut
 832                     str = str.Mid(from, to - from);
 833                 }
 834             }
 835
 836             // StreamOut() wasn't used or failed, try to do it in normal way
 837             if ( str.empty() )
 838 #endif // !wxUSE_UNICODE
 839             {
 840                 // alloc one extra WORD as needed by the control
 841                 wxStringBuffer tmp(str, ++len);
 842                 wxChar *p = tmp;
 843
 844                 TEXTRANGE textRange;
 845                 textRange.chrg.cpMin = from;
 846                 textRange.chrg.cpMax = to;
 847                 textRange.lpstrText = p;
 848
 849                 (void)::SendMessage(GetHwnd(), EM_GETTEXTRANGE,
 850                                     0, (LPARAM)&textRange);
 851
 852                 if ( m_verRichEdit > 1 )
 853                 {
 854                     // RichEdit 2.0 uses just CR ('\r') for the
 855                     // newlines which is neither Unix nor Windows
 856                     // style - convert it to something reasonable
 857                     for ( ; *p; p++ )
 858                     {
 859                         if ( *p == wxT('\r') )
 860                             *p = wxT('\n');
 861                     }
 862                 }
 863             }
 864
 865             if ( m_verRichEdit == 1 )
 866             {
 867                 // convert to the canonical form - see comment below
 868                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 869             }
 870         }
 871         //else: no text at all, leave the string empty
 872     }
 873     else
 874 #endif // wxUSE_RICHEDIT
 875     {
 876         // retrieve all text: wxTextEntry method works even for multiline
 877         // controls and must be used for single line ones to account for hints
 878         str = wxTextEntry::GetValue();
 879
 880         // need only a range?
 881         if ( from < to )
 882         {
 883             str = str.Mid(from, to - from);
 884         }
 885
 886         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 887         // canonical one (same one as above) for consistency with the other kinds
 888         // of controls and, more importantly, with the other ports
 889         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 890     }
 891
 892     return str;
 893 }
 894
 895 void wxTextCtrl::DoSetValue(const wxString& value, int flags)
 896 {
 897     // if the text is long enough, it's faster to just set it instead of first
 898     // comparing it with the old one (chances are that it will be different
 899     // anyhow, this comparison is there to avoid flicker for small single-line
 900     // edit controls mostly)
 901     if ( (value.length() > 0x400) || (value != DoGetValue()) )
 902     {
 903         DoWriteText(value, flags /* doesn't include SelectionOnly here */);
 904
 905         // mark the control as being not dirty - we changed its text, not the
 906         // user
 907         DiscardEdits();
 908
 909         // for compatibility, don't move the cursor when doing SetValue()
 910         SetInsertionPoint(0);
 911     }
 912     else // same text
 913     {
 914         // still reset the modified flag even if the value didn't really change
 915         // because now it comes from the program and not the user (and do it
 916         // before generating the event so that the event handler could get the
 917         // expected value from IsModified())
 918         DiscardEdits();
 919
 920         // still send an event for consistency
 921         if (flags & SetValue_SendEvent)
 922             SendUpdateEvent();
 923     }
 924 }
 925
 926 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 927
 928 // TODO: using memcpy() would improve performance a lot for big amounts of text
 929
 930 DWORD CALLBACK
 931 wxRichEditStreamIn(DWORD_PTR dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 932 {
 933     *pcb = 0;
 934
 935     const wchar_t ** const ppws = (const wchar_t **)dwCookie;
 936
 937     wchar_t *wbuf = (wchar_t *)buf;
 938     const wchar_t *wpc = *ppws;
 939     while ( cb && *wpc )
 940     {
 941         *wbuf++ = *wpc++;
 942
 943         cb -= sizeof(wchar_t);
 944         (*pcb) += sizeof(wchar_t);
 945     }
 946
 947     *ppws = wpc;
 948
 949     return 0;
 950 }
 951
 952 // helper struct used to pass parameters from wxTextCtrl to wxRichEditStreamOut
 953 struct wxStreamOutData
 954 {
 955     wchar_t *wpc;
 956     size_t len;
 957 };
 958
 959 DWORD CALLBACK
 960 wxRichEditStreamOut(DWORD_PTR dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 961 {
 962     *pcb = 0;
 963
 964     wxStreamOutData *data = (wxStreamOutData *)dwCookie;
 965
 966     const wchar_t *wbuf = (const wchar_t *)buf;
 967     wchar_t *wpc = data->wpc;
 968     while ( cb )
 969     {
 970         wchar_t wch = *wbuf++;
 971
 972         // turn "\r\n" into "\n" on the fly
 973         if ( wch != L'\r' )
 974             *wpc++ = wch;
 975         else
 976             data->len--;
 977
 978         cb -= sizeof(wchar_t);
 979         (*pcb) += sizeof(wchar_t);
 980     }
 981
 982     data->wpc = wpc;
 983
 984     return 0;
 985 }
 986
 987
 988 #if wxUSE_UNICODE_MSLU
 989     #define UNUSED_IF_MSLU(param)
 990 #else
 991     #define UNUSED_IF_MSLU(param) param
 992 #endif
 993
 994 bool
 995 wxTextCtrl::StreamIn(const wxString& value,
 996                      wxFontEncoding UNUSED_IF_MSLU(encoding),
 997                      bool selectionOnly)
 998 {
 999 #if wxUSE_UNICODE_MSLU
1000     const wchar_t *wpc = value.c_str();
1001 #else // !wxUSE_UNICODE_MSLU
1002     wxCSConv conv(encoding);
1003
1004     const size_t len = conv.MB2WC(NULL, value.mb_str(), value.length());
1005
1006     if (len == wxCONV_FAILED)
1007         return false;
1008
1009     wxWCharBuffer wchBuf(len); // allocates one extra character
1010     wchar_t *wpc = wchBuf.data();
1011
1012     conv.MB2WC(wpc, value.mb_str(), len + 1);
1013 #endif // wxUSE_UNICODE_MSLU
1014
1015     // finally, stream it in the control
1016     EDITSTREAM eds;
1017     wxZeroMemory(eds);
1018     eds.dwCookie = (DWORD_PTR)&wpc;
1019     // the cast below is needed for broken (very) old mingw32 headers
1020     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
1021
1022     // same problem as in DoWriteText(): we can get multiple events here
1023     UpdatesCountFilter ucf(m_updatesCount);
1024
1025     ::SendMessage(GetHwnd(), EM_STREAMIN,
1026                   SF_TEXT |
1027                   SF_UNICODE |
1028                   (selectionOnly ? SFF_SELECTION : 0),
1029                   (LPARAM)&eds);
1030
1031     // It's okay for EN_UPDATE to not be sent if the selection is empty and
1032     // the text is empty, otherwise warn the programmer about it.
1033     wxASSERT_MSG( ucf.GotUpdate() || ( !HasSelection() && value.empty() ),
1034                   wxT("EM_STREAMIN didn't send EN_UPDATE?") );
1035
1036     if ( eds.dwError )
1037     {
1038         wxLogLastError(wxT("EM_STREAMIN"));
1039     }
1040
1041     return true;
1042 }
1043
1044 #if !wxUSE_UNICODE_MSLU
1045
1046 wxString
1047 wxTextCtrl::StreamOut(wxFontEncoding encoding, bool selectionOnly) const
1048 {
1049     wxString out;
1050
1051     const int len = GetWindowTextLength(GetHwnd());
1052
1053     wxWCharBuffer wchBuf(len);
1054     wchar_t *wpc = wchBuf.data();
1055
1056     wxStreamOutData data;
1057     data.wpc = wpc;
1058     data.len = len;
1059
1060     EDITSTREAM eds;
1061     wxZeroMemory(eds);
1062     eds.dwCookie = (DWORD)&data;
1063     eds.pfnCallback = wxRichEditStreamOut;
1064
1065     ::SendMessage
1066       (
1067         GetHwnd(),
1068         EM_STREAMOUT,
1069         SF_TEXT | SF_UNICODE | (selectionOnly ? SFF_SELECTION : 0),
1070         (LPARAM)&eds
1071       );
1072
1073     if ( eds.dwError )
1074     {
1075         wxLogLastError(wxT("EM_STREAMOUT"));
1076     }
1077     else // streamed out ok
1078     {
1079         // NUL-terminate the string because its length could have been
1080         // decreased by wxRichEditStreamOut
1081         *(wchBuf.data() + data.len) = L'\0';
1082
1083         // now convert to the given encoding (this is a possibly lossful
1084         // conversion but what else can we do)
1085         wxCSConv conv(encoding);
1086         size_t lenNeeded = conv.WC2MB(NULL, wchBuf, 0);
1087
1088         if ( lenNeeded != wxCONV_FAILED && lenNeeded++ )
1089         {
1090             conv.WC2MB(wxStringBuffer(out, lenNeeded), wchBuf, lenNeeded);
1091         }
1092     }
1093
1094     return out;
1095 }
1096
1097 #endif // !wxUSE_UNICODE_MSLU
1098
1099 #endif // wxUSE_RICHEDIT
1100
1101 void wxTextCtrl::WriteText(const wxString& value)
1102 {
1103     DoWriteText(value);
1104 }
1105
1106 void wxTextCtrl::DoWriteText(const wxString& value, int flags)
1107 {
1108     bool selectionOnly = (flags & SetValue_SelectionOnly) != 0;
1109     wxString valueDos;
1110     if ( m_windowStyle & wxTE_MULTILINE )
1111         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
1112     else
1113         valueDos = value;
1114
1115 #if wxUSE_RICHEDIT
1116     // there are several complications with the rich edit controls here
1117     bool done = false;
1118     if ( IsRich() )
1119     {
1120         // first, ensure that the new text will be in the default style
1121         if ( !m_defaultStyle.IsDefault() )
1122         {
1123             long start, end;
1124             GetSelection(&start, &end);
1125             SetStyle(start, end, m_defaultStyle);
1126         }
1127
1128 #if wxUSE_UNICODE_MSLU
1129         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
1130         // but EM_STREAMIN works
1131         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
1132         {
1133            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
1134         }
1135 #endif // wxUSE_UNICODE_MSLU
1136
1137 #if !wxUSE_UNICODE
1138         // next check if the text we're inserting must be shown in a non
1139         // default charset -- this only works for RichEdit > 1.0
1140         if ( GetRichVersion() > 1 )
1141         {
1142             wxFont font = m_defaultStyle.GetFont();
1143             if ( !font.Ok() )
1144                 font = GetFont();
1145
1146             if ( font.Ok() )
1147             {
1148                wxFontEncoding encoding = font.GetEncoding();
1149                if ( encoding != wxFONTENCODING_SYSTEM )
1150                {
1151                    // we have to use EM_STREAMIN to force richedit control 2.0+
1152                    // to show any text in the non default charset -- otherwise
1153                    // it thinks it knows better than we do and always shows it
1154                    // in the default one
1155                    done = StreamIn(valueDos, encoding, selectionOnly);
1156                }
1157             }
1158         }
1159 #endif // !wxUSE_UNICODE
1160     }
1161
1162     if ( !done )
1163 #endif // wxUSE_RICHEDIT
1164     {
1165         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
1166         // call (this happens for plain EDITs with EM_REPLACESEL and under some
1167         // -- undetermined -- conditions with rich edit) and sometimes we don't
1168         // get any events at all (plain EDIT with WM_SETTEXT), so ensure that
1169         // we generate exactly one of them by ignoring all but the first one in
1170         // SendUpdateEvent() and generating one ourselves if we hadn't got any
1171         // notifications from Windows
1172         if ( !(flags & SetValue_SendEvent) )
1173             m_updatesCount = -2;        // suppress any update event
1174
1175         UpdatesCountFilter ucf(m_updatesCount);
1176
1177         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
1178                       // EM_REPLACESEL takes 1 to indicate the operation should be redoable
1179                       selectionOnly ? 1 : 0, (LPARAM)valueDos.wx_str());
1180
1181         if ( !ucf.GotUpdate() && (flags & SetValue_SendEvent) )
1182         {
1183             SendUpdateEvent();
1184         }
1185     }
1186 }
1187
1188 void wxTextCtrl::AppendText(const wxString& text)
1189 {
1190     wxTextEntry::AppendText(text);
1191
1192 #if wxUSE_RICHEDIT
1193     // don't do this if we're frozen, saves some time
1194     if ( !IsFrozen() && IsMultiLine() && GetRichVersion() > 1 )
1195     {
1196         // setting the caret to the end and showing it simply doesn't work for
1197         // RichEdit 2.0 -- force it to still do what we want
1198         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
1199     }
1200 #endif // wxUSE_RICHEDIT
1201 }
1202
1203 void wxTextCtrl::Clear()
1204 {
1205     ::SetWindowText(GetHwnd(), wxEmptyString);
1206
1207     if ( IsMultiLine() && !IsRich() )
1208     {
1209         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
1210         // but the normal ones don't -- make Clear() behaviour consistent by
1211         // always sending this event
1212         SendUpdateEvent();
1213     }
1214 }
1215
1216 #ifdef __WIN32__
1217
1218 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
1219 {
1220     SetFocus();
1221
1222     size_t lenOld = GetValue().length();
1223
1224     wxUint32 code = event.GetRawKeyCode();
1225     ::keybd_event((BYTE)code, 0, 0 /* key press */, 0);
1226     ::keybd_event((BYTE)code, 0, KEYEVENTF_KEYUP, 0);
1227
1228     // assume that any alphanumeric key changes the total number of characters
1229     // in the control - this should work in 99% of cases
1230     return GetValue().length() != lenOld;
1231 }
1232
1233 #endif // __WIN32__
1234
1235 // ----------------------------------------------------------------------------
1236 // Accessors
1237 // ----------------------------------------------------------------------------
1238
1239 void wxTextCtrl::SetInsertionPointEnd()
1240 {
1241     // we must not do anything if the caret is already there because calling
1242     // SetInsertionPoint() thaws the controls if Freeze() had been called even
1243     // if it doesn't actually move the caret anywhere and so the simple fact of
1244     // doing it results in horrible flicker when appending big amounts of text
1245     // to the control in a few chunks (see DoAddText() test in the text sample)
1246     const wxTextPos lastPosition = GetLastPosition();
1247     if ( GetInsertionPoint() == lastPosition )
1248     {
1249         return;
1250     }
1251
1252     SetInsertionPoint(lastPosition);
1253 }
1254
1255 long wxTextCtrl::GetInsertionPoint() const
1256 {
1257 #if wxUSE_RICHEDIT
1258     if ( IsRich() )
1259     {
1260         CHARRANGE range;
1261         range.cpMin = 0;
1262         range.cpMax = 0;
1263         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
1264         return range.cpMin;
1265     }
1266 #endif // wxUSE_RICHEDIT
1267
1268     return wxTextEntry::GetInsertionPoint();
1269 }
1270
1271 wxTextPos wxTextCtrl::GetLastPosition() const
1272 {
1273     if ( IsMultiLine() )
1274     {
1275         int numLines = GetNumberOfLines();
1276         long posStartLastLine = XYToPosition(0, numLines - 1);
1277
1278         long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
1279
1280         return posStartLastLine + lenLastLine;
1281     }
1282
1283     return wxTextEntry::GetLastPosition();
1284 }
1285
1286 // If the return values from and to are the same, there is no
1287 // selection.
1288 void wxTextCtrl::GetSelection(long *from, long *to) const
1289 {
1290 #if wxUSE_RICHEDIT
1291     if ( IsRich() )
1292     {
1293         CHARRANGE charRange;
1294         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
1295
1296         *from = charRange.cpMin;
1297         *to = charRange.cpMax;
1298     }
1299     else
1300 #endif // !wxUSE_RICHEDIT
1301     {
1302         wxTextEntry::GetSelection(from, to);
1303     }
1304 }
1305
1306 // ----------------------------------------------------------------------------
1307 // selection
1308 // ----------------------------------------------------------------------------
1309
1310 void wxTextCtrl::DoSetSelection(long from, long to, int flags)
1311 {
1312     HWND hWnd = GetHwnd();
1313
1314 #if wxUSE_RICHEDIT
1315     if ( IsRich() )
1316     {
1317         // if from and to are both -1, it means (in wxWidgets) that all text
1318         // should be selected, translate this into Windows convention
1319         if ( (from == -1) && (to == -1) )
1320         {
1321             from = 0;
1322         }
1323
1324         CHARRANGE range;
1325         range.cpMin = from;
1326         range.cpMax = to;
1327         ::SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM)&range);
1328     }
1329     else
1330 #endif // wxUSE_RICHEDIT
1331     {
1332         wxTextEntry::DoSetSelection(from, to, flags);
1333     }
1334
1335     if ( (flags & SetSel_Scroll) && !IsFrozen() )
1336     {
1337 #if wxUSE_RICHEDIT
1338         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1339         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1340         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1341         // option is set (but it does work ok in richedit 1.0 mode...)
1342         //
1343         // so to make it work we either need to give focus to it here which
1344         // will probably create many problems (dummy focus events; window
1345         // containing the text control being brought to foreground
1346         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1347         // create other problems too -- and in fact it does because if we turn
1348         // on/off this style while appending the text to the control, the
1349         // vertical scrollbar never appears in it even if we append tons of
1350         // text and to work around this the only solution I found was to use
1351         // ES_DISABLENOSCROLL
1352         //
1353         // this is very ugly but I don't see any other way to make this work
1354         long style = 0;
1355         if ( GetRichVersion() > 1 )
1356         {
1357             if ( !HasFlag(wxTE_NOHIDESEL) )
1358             {
1359                 // setting ECO_NOHIDESEL also sets WS_VISIBLE and possibly
1360                 // others, remember the style so we can reset it later if needed
1361                 style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1362                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1363                               ECOOP_OR, ECO_NOHIDESEL);
1364             }
1365             //else: everything is already ok
1366         }
1367 #endif // wxUSE_RICHEDIT
1368
1369         ::SendMessage(hWnd, EM_SCROLLCARET, 0, (LPARAM)0);
1370
1371 #if wxUSE_RICHEDIT
1372         // restore ECO_NOHIDESEL if we changed it
1373         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1374         {
1375             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1376                           ECOOP_AND, ~ECO_NOHIDESEL);
1377             if ( style != ::GetWindowLong(GetHwnd(), GWL_STYLE) )
1378                 ::SetWindowLong(GetHwnd(), GWL_STYLE, style);
1379         }
1380 #endif // wxUSE_RICHEDIT
1381     }
1382 }
1383
1384 // ----------------------------------------------------------------------------
1385 // Working with files
1386 // ----------------------------------------------------------------------------
1387
1388 bool wxTextCtrl::DoLoadFile(const wxString& file, int fileType)
1389 {
1390     if ( wxTextCtrlBase::DoLoadFile(file, fileType) )
1391     {
1392         // update the size limit if needed
1393         AdjustSpaceLimit();
1394
1395         return true;
1396     }
1397
1398     return false;
1399 }
1400
1401 // ----------------------------------------------------------------------------
1402 // dirty status
1403 // ----------------------------------------------------------------------------
1404
1405 bool wxTextCtrl::IsModified() const
1406 {
1407     return ::SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1408 }
1409
1410 void wxTextCtrl::MarkDirty()
1411 {
1412     ::SendMessage(GetHwnd(), EM_SETMODIFY, TRUE, 0);
1413 }
1414
1415 void wxTextCtrl::DiscardEdits()
1416 {
1417     ::SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0);
1418 }
1419
1420 // ----------------------------------------------------------------------------
1421 // Positions <-> coords
1422 // ----------------------------------------------------------------------------
1423
1424 int wxTextCtrl::GetNumberOfLines() const
1425 {
1426     return (int)::SendMessage(GetHwnd(), EM_GETLINECOUNT, 0, 0);
1427 }
1428
1429 long wxTextCtrl::XYToPosition(long x, long y) const
1430 {
1431     // This gets the char index for the _beginning_ of this line
1432     long charIndex = ::SendMessage(GetHwnd(), EM_LINEINDEX, y, 0);
1433
1434     return charIndex + x;
1435 }
1436
1437 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1438 {
1439     HWND hWnd = GetHwnd();
1440
1441     // This gets the line number containing the character
1442     long lineNo;
1443 #if wxUSE_RICHEDIT
1444     if ( IsRich() )
1445     {
1446         lineNo = ::SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, pos);
1447     }
1448     else
1449 #endif // wxUSE_RICHEDIT
1450     {
1451         lineNo = ::SendMessage(hWnd, EM_LINEFROMCHAR, pos, 0);
1452     }
1453
1454     if ( lineNo == -1 )
1455     {
1456         // no such line
1457         return false;
1458     }
1459
1460     // This gets the char index for the _beginning_ of this line
1461     long charIndex = ::SendMessage(hWnd, EM_LINEINDEX, lineNo, 0);
1462     if ( charIndex == -1 )
1463     {
1464         return false;
1465     }
1466
1467     // The X position must therefore be the different between pos and charIndex
1468     if ( x )
1469         *x = pos - charIndex;
1470     if ( y )
1471         *y = lineNo;
1472
1473     return true;
1474 }
1475
1476 wxTextCtrlHitTestResult
1477 wxTextCtrl::HitTest(const wxPoint& pt, long *posOut) const
1478 {
1479     // first get the position from Windows
1480     LPARAM lParam;
1481
1482 #if wxUSE_RICHEDIT
1483     POINTL ptl;
1484     if ( IsRich() )
1485     {
1486         // for rich edit controls the position is passed iva the struct fields
1487         ptl.x = pt.x;
1488         ptl.y = pt.y;
1489         lParam = (LPARAM)&ptl;
1490     }
1491     else
1492 #endif // wxUSE_RICHEDIT
1493     {
1494         // for the plain ones, we are limited to 16 bit positions which are
1495         // combined in a single 32 bit value
1496         lParam = MAKELPARAM(pt.x, pt.y);
1497     }
1498
1499     LRESULT pos = ::SendMessage(GetHwnd(), EM_CHARFROMPOS, 0, lParam);
1500
1501     if ( pos == -1 )
1502     {
1503         // this seems to indicate an error...
1504         return wxTE_HT_UNKNOWN;
1505     }
1506
1507 #if wxUSE_RICHEDIT
1508     if ( !IsRich() )
1509 #endif // wxUSE_RICHEDIT
1510     {
1511         // for plain EDIT controls the higher word contains something else
1512         pos = LOWORD(pos);
1513     }
1514
1515
1516     // next determine where it is relatively to our point: EM_CHARFROMPOS
1517     // always returns the closest character but we need to be more precise, so
1518     // double check that we really are where it pretends
1519     POINTL ptReal;
1520
1521 #if wxUSE_RICHEDIT
1522     // FIXME: we need to distinguish between richedit 2 and 3 here somehow but
1523     //        we don't know how to do it
1524     if ( IsRich() )
1525     {
1526         ::SendMessage(GetHwnd(), EM_POSFROMCHAR, (WPARAM)&ptReal, pos);
1527     }
1528     else
1529 #endif // wxUSE_RICHEDIT
1530     {
1531         LRESULT lRc = ::SendMessage(GetHwnd(), EM_POSFROMCHAR, pos, 0);
1532
1533         if ( lRc == -1 )
1534         {
1535             // this is apparently returned when pos corresponds to the last
1536             // position
1537             ptReal.x =
1538             ptReal.y = 0;
1539         }
1540         else
1541         {
1542             ptReal.x = LOWORD(lRc);
1543             ptReal.y = HIWORD(lRc);
1544         }
1545     }
1546
1547     wxTextCtrlHitTestResult rc;
1548
1549     if ( pt.y > ptReal.y + GetCharHeight() )
1550         rc = wxTE_HT_BELOW;
1551     else if ( pt.x > ptReal.x + GetCharWidth() )
1552         rc = wxTE_HT_BEYOND;
1553     else
1554         rc = wxTE_HT_ON_TEXT;
1555
1556     if ( posOut )
1557         *posOut = pos;
1558
1559     return rc;
1560 }
1561
1562 // ----------------------------------------------------------------------------
1563 //
1564 // ----------------------------------------------------------------------------
1565
1566 void wxTextCtrl::ShowPosition(long pos)
1567 {
1568     HWND hWnd = GetHwnd();
1569
1570     // To scroll to a position, we pass the number of lines and characters
1571     // to scroll *by*. This means that we need to:
1572     // (1) Find the line position of the current line.
1573     // (2) Find the line position of pos.
1574     // (3) Scroll by (pos - current).
1575     // For now, ignore the horizontal scrolling.
1576
1577     // Is this where scrolling is relative to - the line containing the caret?
1578     // Or is the first visible line??? Try first visible line.
1579 //    int currentLineLineNo1 = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, -1, 0L);
1580
1581     int currentLineLineNo = (int)::SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, 0, 0);
1582
1583     int specifiedLineLineNo = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, pos, 0);
1584
1585     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1586
1587     if (linesToScroll != 0)
1588       ::SendMessage(hWnd, EM_LINESCROLL, 0, linesToScroll);
1589 }
1590
1591 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1592 {
1593     return ::SendMessage(GetHwnd(), EM_LINELENGTH, pos, 0);
1594 }
1595
1596 int wxTextCtrl::GetLineLength(long lineNo) const
1597 {
1598     long pos = XYToPosition(0, lineNo);
1599
1600     return GetLengthOfLineContainingPos(pos);
1601 }
1602
1603 wxString wxTextCtrl::GetLineText(long lineNo) const
1604 {
1605     size_t len = (size_t)GetLineLength(lineNo) + 1;
1606
1607     // there must be at least enough place for the length WORD in the
1608     // buffer
1609     len += sizeof(WORD);
1610
1611     wxString str;
1612     {
1613         wxStringBufferLength tmp(str, len);
1614         wxChar *buf = tmp;
1615
1616         *(WORD *)buf = (WORD)len;
1617         len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1618
1619 #if wxUSE_RICHEDIT
1620         if ( IsRich() )
1621         {
1622             // remove the '\r' returned by the rich edit control, the user code
1623             // should never see it
1624             if ( buf[len - 2] == wxT('\r') && buf[len - 1] == wxT('\n') )
1625             {
1626                 // richedit 1.0 uses "\r\n" as line terminator, so remove "\r"
1627                 // here and "\n" below
1628                 buf[len - 2] = wxT('\n');
1629                 len--;
1630             }
1631             else if ( buf[len - 1] == wxT('\r') )
1632             {
1633                 // richedit 2.0+ uses only "\r", replace it with "\n"
1634                 buf[len - 1] = wxT('\n');
1635             }
1636         }
1637 #endif // wxUSE_RICHEDIT
1638
1639         // remove the '\n' at the end, if any (this is how this function is
1640         // supposed to work according to the docs)
1641         if ( buf[len - 1] == wxT('\n') )
1642         {
1643             len--;
1644         }
1645
1646         buf[len] = 0;
1647         tmp.SetLength(len);
1648     }
1649
1650     return str;
1651 }
1652
1653 void wxTextCtrl::SetMaxLength(unsigned long len)
1654 {
1655 #if wxUSE_RICHEDIT
1656     if ( IsRich() )
1657     {
1658         ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, len ? len : 0x7fffffff);
1659     }
1660     else
1661 #endif // wxUSE_RICHEDIT
1662     {
1663         wxTextEntry::SetMaxLength(len);
1664     }
1665 }
1666
1667 // ----------------------------------------------------------------------------
1668 // Undo/redo
1669 // ----------------------------------------------------------------------------
1670
1671 void wxTextCtrl::Redo()
1672 {
1673 #if wxUSE_RICHEDIT
1674     if ( GetRichVersion() > 1 )
1675     {
1676         ::SendMessage(GetHwnd(), EM_REDO, 0, 0);
1677         return;
1678     }
1679 #endif // wxUSE_RICHEDIT
1680
1681     wxTextEntry::Redo();
1682 }
1683
1684 bool wxTextCtrl::CanRedo() const
1685 {
1686 #if wxUSE_RICHEDIT
1687     if ( GetRichVersion() > 1 )
1688         return ::SendMessage(GetHwnd(), EM_CANREDO, 0, 0) != 0;
1689 #endif // wxUSE_RICHEDIT
1690
1691     return wxTextEntry::CanRedo();
1692 }
1693
1694 // ----------------------------------------------------------------------------
1695 // caret handling (Windows only)
1696 // ----------------------------------------------------------------------------
1697
1698 bool wxTextCtrl::ShowNativeCaret(bool show)
1699 {
1700     if ( show != m_isNativeCaretShown )
1701     {
1702         if ( !(show ? ::ShowCaret(GetHwnd()) : ::HideCaret(GetHwnd())) )
1703         {
1704             // not an error, may simply indicate that it's not shown/hidden
1705             // yet (i.e. it had been hidden/shown 2 times before)
1706             return false;
1707         }
1708
1709         m_isNativeCaretShown = show;
1710     }
1711
1712     return true;
1713 }
1714
1715 // ----------------------------------------------------------------------------
1716 // implementation details
1717 // ----------------------------------------------------------------------------
1718
1719 void wxTextCtrl::Command(wxCommandEvent & event)
1720 {
1721     SetValue(event.GetString());
1722     ProcessCommand (event);
1723 }
1724
1725 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1726 {
1727     // By default, load the first file into the text window.
1728     if (event.GetNumberOfFiles() > 0)
1729     {
1730         LoadFile(event.GetFiles()[0]);
1731     }
1732 }
1733
1734 // ----------------------------------------------------------------------------
1735 // kbd input processing
1736 // ----------------------------------------------------------------------------
1737
1738 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* msg)
1739 {
1740     // check for our special keys here: if we don't do it and the parent frame
1741     // uses them as accelerators, they wouldn't work at all, so we disable
1742     // usual preprocessing for them
1743     if ( msg->message == WM_KEYDOWN )
1744     {
1745         const WPARAM vkey = msg->wParam;
1746         if ( HIWORD(msg->lParam) & KF_ALTDOWN )
1747         {
1748             // Alt-Backspace is accelerator for "Undo"
1749             if ( vkey == VK_BACK )
1750                 return false;
1751         }
1752         else // no Alt
1753         {
1754             // we want to process some Ctrl-foo and Shift-bar but no key
1755             // combinations without either Ctrl or Shift nor with both of them
1756             // pressed
1757             const int ctrl = wxIsCtrlDown(),
1758                       shift = wxIsShiftDown();
1759             switch ( ctrl + shift )
1760             {
1761                 default:
1762                     wxFAIL_MSG( wxT("how many modifiers have we got?") );
1763                     // fall through
1764
1765                 case 0:
1766                     if ( IsMultiLine() && vkey == VK_RETURN )
1767                         return false;
1768                     // fall through
1769                 case 2:
1770                     break;
1771
1772                 case 1:
1773                     // either Ctrl or Shift pressed
1774                     if ( ctrl )
1775                     {
1776                         switch ( vkey )
1777                         {
1778                             case 'C':
1779                             case 'V':
1780                             case 'X':
1781                             case VK_INSERT:
1782                             case VK_DELETE:
1783                             case VK_HOME:
1784                             case VK_END:
1785                                 return false;
1786                         }
1787                     }
1788                     else // Shift is pressed
1789                     {
1790                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1791                             return false;
1792                     }
1793             }
1794         }
1795     }
1796
1797     return wxControl::MSWShouldPreProcessMessage(msg);
1798 }
1799
1800 void wxTextCtrl::OnChar(wxKeyEvent& event)
1801 {
1802     switch ( event.GetKeyCode() )
1803     {
1804         case WXK_RETURN:
1805             {
1806                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1807                 InitCommandEvent(event);
1808                 event.SetString(GetValue());
1809                 if ( HandleWindowEvent(event) )
1810                 if ( !HasFlag(wxTE_MULTILINE) )
1811                     return;
1812                 //else: multiline controls need Enter for themselves
1813             }
1814             break;
1815
1816         case WXK_TAB:
1817             // ok, so this is getting absolutely ridiculous but I don't see
1818             // any other way to fix this bug: when a multiline text control is
1819             // inside a wxFrame, we need to generate the navigation event as
1820             // otherwise nothing happens at all, but when the same control is
1821             // created inside a dialog, IsDialogMessage() *does* switch focus
1822             // all by itself and so if we do it here as well, it is advanced
1823             // twice and goes to the next control... to prevent this from
1824             // happening we're doing this ugly check, the logic being that if
1825             // we don't have focus then it had been already changed to the next
1826             // control
1827             //
1828             // the right thing to do would, of course, be to understand what
1829             // the hell is IsDialogMessage() doing but this is beyond my feeble
1830             // forces at the moment unfortunately
1831             if ( !(m_windowStyle & wxTE_PROCESS_TAB))
1832             {
1833                 if ( FindFocus() == this )
1834                 {
1835                     int flags = 0;
1836                     if (!event.ShiftDown())
1837                         flags |= wxNavigationKeyEvent::IsForward ;
1838                     if (event.ControlDown())
1839                         flags |= wxNavigationKeyEvent::WinChange ;
1840                     if (Navigate(flags))
1841                         return;
1842                 }
1843             }
1844             else
1845             {
1846                 // Insert tab since calling the default Windows handler
1847                 // doesn't seem to do it
1848                 WriteText(wxT("\t"));
1849                 return;
1850             }
1851             break;
1852     }
1853
1854     // no, we didn't process it
1855     event.Skip();
1856 }
1857
1858 void wxTextCtrl::OnKeyDown(wxKeyEvent& event)
1859 {
1860     // richedit control doesn't send WM_PASTE, WM_CUT and WM_COPY messages
1861     // when Ctrl-V, X or C is pressed and this prevents wxClipboardTextEvent
1862     // from working. So we work around it by intercepting these shortcuts
1863     // ourselves and emitting clipboard events (which richedit will handle,
1864     // so everything works as before, including pasting of rich text):
1865     if ( event.GetModifiers() == wxMOD_CONTROL && IsRich() )
1866     {
1867         switch ( event.GetKeyCode() )
1868         {
1869             case 'C':
1870                 Copy();
1871                 return;
1872             case 'X':
1873                 Cut();
1874                 return;
1875             case 'V':
1876                 Paste();
1877                 return;
1878             default:
1879                 break;
1880         }
1881     }
1882
1883     // no, we didn't process it
1884     event.Skip();
1885 }
1886
1887 WXLRESULT wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1888 {
1889     WXLRESULT lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1890
1891     switch ( nMsg )
1892     {
1893         case WM_GETDLGCODE:
1894             {
1895                 // we always want the chars and the arrows: the arrows for
1896                 // navigation and the chars because we want Ctrl-C to work even
1897                 // in a read only control
1898                 long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1899
1900                 if ( IsEditable() )
1901                 {
1902                     // we may have several different cases:
1903                     // 1. normal: both TAB and ENTER are used for navigation
1904                     // 2. ctrl wants TAB for itself: ENTER is used to pass to
1905                     //    the next control in the dialog
1906                     // 3. ctrl wants ENTER for itself: TAB is used for dialog
1907                     //    navigation
1908                     // 4. ctrl wants both TAB and ENTER: Ctrl-ENTER is used to
1909                     //    go to the next control (we need some way to do it)
1910
1911                     // multiline controls should always get ENTER for themselves
1912                     if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1913                         lDlgCode |= DLGC_WANTMESSAGE;
1914
1915                     if ( HasFlag(wxTE_PROCESS_TAB) )
1916                         lDlgCode |= DLGC_WANTTAB;
1917
1918                     lRc |= lDlgCode;
1919                 }
1920                 else // !editable
1921                 {
1922                     // NB: use "=", not "|=" as the base class version returns
1923                     //     the same flags in the disabled state as usual (i.e.
1924                     //     including DLGC_WANTMESSAGE). This is strange (how
1925                     //     does it work in the native Win32 apps?) but for now
1926                     //     live with it.
1927                     lRc = lDlgCode;
1928                 }
1929             }
1930             break;
1931
1932 #if wxUSE_MENUS
1933         case WM_SETCURSOR:
1934             // rich text controls seem to have a bug and don't change the
1935             // cursor to the standard arrow one from the I-beam cursor usually
1936             // used by them even when a popup menu is shown (this works fine
1937             // for plain EDIT controls though), so explicitly work around this
1938             if ( IsRich() )
1939             {
1940                 extern wxMenu *wxCurrentPopupMenu;
1941                 if ( wxCurrentPopupMenu &&
1942                         wxCurrentPopupMenu->GetInvokingWindow() == this )
1943                     ::SetCursor(GetHcursorOf(*wxSTANDARD_CURSOR));
1944             }
1945 #endif // wxUSE_MENUS
1946     }
1947
1948     return lRc;
1949 }
1950
1951 // ----------------------------------------------------------------------------
1952 // text control event processing
1953 // ----------------------------------------------------------------------------
1954
1955 bool wxTextCtrl::SendUpdateEvent()
1956 {
1957     switch ( m_updatesCount )
1958     {
1959         case 0:
1960             // remember that we've got an update
1961             m_updatesCount++;
1962             break;
1963
1964         case 1:
1965             // we had already sent one event since the last control modification
1966             return false;
1967
1968         default:
1969             wxFAIL_MSG( wxT("unexpected wxTextCtrl::m_updatesCount value") );
1970             // fall through
1971
1972         case -1:
1973             // we hadn't updated the control ourselves, this event comes from
1974             // the user, don't need to ignore it nor update the count
1975             break;
1976
1977         case -2:
1978             // the control was updated programmatically and we do NOT want to
1979             // send events
1980             return false;
1981     }
1982
1983     return SendTextUpdatedEvent();
1984 }
1985
1986 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1987 {
1988     switch ( param )
1989     {
1990         case EN_CHANGE:
1991             SendUpdateEvent();
1992             break;
1993
1994         case EN_MAXTEXT:
1995             // the text size limit has been hit -- try to increase it
1996             if ( !AdjustSpaceLimit() )
1997             {
1998                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1999                 InitCommandEvent(event);
2000                 event.SetString(GetValue());
2001                 ProcessCommand(event);
2002             }
2003             break;
2004
2005             // the other edit notification messages are not processed (or, in
2006             // the case of EN_{SET/KILL}FOCUS were already handled at WM_SET/
2007             // KILLFOCUS level)
2008         default:
2009             return false;
2010     }
2011
2012     // processed
2013     return true;
2014 }
2015
2016 WXHBRUSH wxTextCtrl::MSWControlColor(WXHDC hDC, WXHWND hWnd)
2017 {
2018     if ( !IsEnabled() && !HasFlag(wxTE_MULTILINE) )
2019         return MSWControlColorDisabled(hDC);
2020
2021     return wxTextCtrlBase::MSWControlColor(hDC, hWnd);
2022 }
2023
2024 bool wxTextCtrl::HasSpaceLimit(unsigned int *len) const
2025 {
2026     // HACK: we try to automatically extend the limit for the amount of text
2027     //       to allow (interactively) entering more than 64Kb of text under
2028     //       Win9x but we shouldn't reset the text limit which was previously
2029     //       set explicitly with SetMaxLength()
2030     //
2031     //       Unfortunately there is no EM_GETLIMITTEXTSETBYUSER and so we don't
2032     //       know the limit we set (if any). We could solve this by storing the
2033     //       limit we set in wxTextCtrl but to save space we prefer to simply
2034     //       test here the actual limit value: we consider that SetMaxLength()
2035     //       can only be called for small values while EN_MAXTEXT is only sent
2036     //       for large values (in practice the default limit seems to be 30000
2037     //       but make it smaller just to be on the safe side)
2038     *len = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
2039     return *len < 10001;
2040
2041 }
2042
2043 bool wxTextCtrl::AdjustSpaceLimit()
2044 {
2045     unsigned int limit;
2046     if ( HasSpaceLimit(&limit) )
2047         return false;
2048
2049     unsigned int len = ::GetWindowTextLength(GetHwnd());
2050     if ( len >= limit )
2051     {
2052         // increment in 32Kb chunks
2053         SetMaxLength(len + 0x8000);
2054     }
2055
2056     // we changed the limit
2057     return true;
2058 }
2059
2060 bool wxTextCtrl::AcceptsFocusFromKeyboard() const
2061 {
2062     // we don't want focus if we can't be edited unless we're a multiline
2063     // control because then it might be still nice to get focus from keyboard
2064     // to be able to scroll it without mouse
2065     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
2066 }
2067
2068 wxSize wxTextCtrl::DoGetBestSize() const
2069 {
2070     int cx, cy;
2071     wxGetCharSize(GetHWND(), &cx, &cy, GetFont());
2072
2073     int wText = DEFAULT_ITEM_WIDTH;
2074
2075     int hText = cy;
2076     if ( m_windowStyle & wxTE_MULTILINE )
2077     {
2078         hText *= wxMax(wxMin(GetNumberOfLines(), 10), 2);
2079     }
2080     //else: for single line control everything is ok
2081
2082     // we have to add the adjustments for the control height only once, not
2083     // once per line, so do it after multiplication above
2084     hText += EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy) - cy;
2085
2086     return wxSize(wText, hText);
2087 }
2088
2089 // ----------------------------------------------------------------------------
2090 // standard handlers for standard edit menu events
2091 // ----------------------------------------------------------------------------
2092
2093 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2094 {
2095     Cut();
2096 }
2097
2098 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2099 {
2100     Copy();
2101 }
2102
2103 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2104 {
2105     Paste();
2106 }
2107
2108 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2109 {
2110     Undo();
2111 }
2112
2113 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2114 {
2115     Redo();
2116 }
2117
2118 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
2119 {
2120     RemoveSelection();
2121 }
2122
2123 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2124 {
2125     SelectAll();
2126 }
2127
2128 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2129 {
2130     event.Enable( CanCut() );
2131 }
2132
2133 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2134 {
2135     event.Enable( CanCopy() );
2136 }
2137
2138 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2139 {
2140     event.Enable( CanPaste() );
2141 }
2142
2143 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2144 {
2145     event.Enable( CanUndo() );
2146 }
2147
2148 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2149 {
2150     event.Enable( CanRedo() );
2151 }
2152
2153 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
2154 {
2155     event.Enable( HasSelection() && IsEditable() );
2156 }
2157
2158 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2159 {
2160     event.Enable( !IsEmpty() );
2161 }
2162
2163 void wxTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2164 {
2165 #if wxUSE_RICHEDIT
2166     if (IsRich())
2167     {
2168         if (!m_privateContextMenu)
2169         {
2170             m_privateContextMenu = new wxMenu;
2171             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
2172             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
2173             m_privateContextMenu->AppendSeparator();
2174             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
2175             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
2176             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
2177             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
2178             m_privateContextMenu->AppendSeparator();
2179             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
2180         }
2181         PopupMenu(m_privateContextMenu);
2182         return;
2183     }
2184     else
2185 #endif
2186     event.Skip();
2187 }
2188
2189 void wxTextCtrl::OnSetFocus(wxFocusEvent& event)
2190 {
2191     // be sure the caret remains invisible if the user had hidden it
2192     if ( !m_isNativeCaretShown )
2193     {
2194         ::HideCaret(GetHwnd());
2195     }
2196
2197     event.Skip();
2198 }
2199
2200 // the rest of the file only deals with the rich edit controls
2201 #if wxUSE_RICHEDIT
2202
2203 // ----------------------------------------------------------------------------
2204 // EN_LINK processing
2205 // ----------------------------------------------------------------------------
2206
2207 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
2208 {
2209     NMHDR *hdr = (NMHDR* )lParam;
2210     switch ( hdr->code )
2211     {
2212        case EN_MSGFILTER:
2213             {
2214                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
2215                 UINT msg = msgf->msg;
2216
2217                 // this is a bit crazy but richedit 1.0 sends us all mouse
2218                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
2219                 // generate the wxWin events for this message manually
2220                 //
2221                 // NB: in fact, this is still not totally correct as it does
2222                 //     send us WM_LBUTTONUP if the selection was cleared by the
2223                 //     last click -- so currently we get 2 events in this case,
2224                 //     but as I don't see any obvious way to check for this I
2225                 //     leave this code in place because it's still better than
2226                 //     not getting left up events at all
2227                 if ( msg == WM_LBUTTONUP )
2228                 {
2229                     WXUINT flags = msgf->wParam;
2230                     int x = GET_X_LPARAM(msgf->lParam),
2231                         y = GET_Y_LPARAM(msgf->lParam);
2232
2233                     HandleMouseEvent(msg, x, y, flags);
2234                 }
2235             }
2236
2237             // return true to process the event (and false to ignore it)
2238             return true;
2239
2240         case EN_LINK:
2241             {
2242                 const ENLINK *enlink = (ENLINK *)hdr;
2243
2244                 switch ( enlink->msg )
2245                 {
2246                     case WM_SETCURSOR:
2247                         // ok, so it is hardcoded - do we really nee to
2248                         // customize it?
2249                         {
2250                             wxCursor cur(wxCURSOR_HAND);
2251                             ::SetCursor(GetHcursorOf(cur));
2252                             *result = TRUE;
2253                             break;
2254                         }
2255
2256                     case WM_MOUSEMOVE:
2257                     case WM_LBUTTONDOWN:
2258                     case WM_LBUTTONUP:
2259                     case WM_LBUTTONDBLCLK:
2260                     case WM_RBUTTONDOWN:
2261                     case WM_RBUTTONUP:
2262                     case WM_RBUTTONDBLCLK:
2263                         // send a mouse event
2264                         {
2265                             static const wxEventType eventsMouse[] =
2266                             {
2267                                 wxEVT_MOTION,
2268                                 wxEVT_LEFT_DOWN,
2269                                 wxEVT_LEFT_UP,
2270                                 wxEVT_LEFT_DCLICK,
2271                                 wxEVT_RIGHT_DOWN,
2272                                 wxEVT_RIGHT_UP,
2273                                 wxEVT_RIGHT_DCLICK,
2274                             };
2275
2276                             // the event ids are consecutive
2277                             wxMouseEvent
2278                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
2279
2280                             InitMouseEvent(evtMouse,
2281                                            GET_X_LPARAM(enlink->lParam),
2282                                            GET_Y_LPARAM(enlink->lParam),
2283                                            enlink->wParam);
2284
2285                             wxTextUrlEvent event(m_windowId, evtMouse,
2286                                                  enlink->chrg.cpMin,
2287                                                  enlink->chrg.cpMax);
2288
2289                             InitCommandEvent(event);
2290
2291                             *result = ProcessCommand(event);
2292                         }
2293                         break;
2294                 }
2295             }
2296             return true;
2297     }
2298
2299     // not processed, leave it to the base class
2300     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
2301 }
2302
2303 #if wxUSE_DRAG_AND_DROP
2304
2305 void wxTextCtrl::SetDropTarget(wxDropTarget *dropTarget)
2306 {
2307     if ( m_dropTarget == wxRICHTEXT_DEFAULT_DROPTARGET )
2308     {
2309         // get rid of the built-in drop target
2310         ::RevokeDragDrop(GetHwnd());
2311         m_dropTarget = NULL;
2312     }
2313
2314     wxTextCtrlBase::SetDropTarget(dropTarget);
2315 }
2316
2317 #endif // wxUSE_DRAG_AND_DROP
2318
2319 // ----------------------------------------------------------------------------
2320 // colour setting for the rich edit controls
2321 // ----------------------------------------------------------------------------
2322
2323 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
2324 {
2325     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
2326     {
2327         // colour didn't really change
2328         return false;
2329     }
2330
2331     if ( IsRich() )
2332     {
2333         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
2334         // EM_SETBKGNDCOLOR additionally
2335         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
2336     }
2337
2338     return true;
2339 }
2340
2341 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
2342 {
2343     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
2344     {
2345         // colour didn't really change
2346         return false;
2347     }
2348
2349     if ( IsRich() )
2350     {
2351         // change the colour of everything
2352         CHARFORMAT cf;
2353         wxZeroMemory(cf);
2354         cf.cbSize = sizeof(cf);
2355         cf.dwMask = CFM_COLOR;
2356         cf.crTextColor = wxColourToRGB(colour);
2357         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
2358     }
2359
2360     return true;
2361 }
2362
2363 // ----------------------------------------------------------------------------
2364 // styling support for rich edit controls
2365 // ----------------------------------------------------------------------------
2366
2367 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2368 {
2369     if ( !IsRich() )
2370     {
2371         // can't do it with normal text control
2372         return false;
2373     }
2374
2375     // the richedit 1.0 doesn't handle setting background colour, so don't
2376     // even try to do anything if it's the only thing we want to change
2377     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
2378         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
2379         !style.HasTabs() )
2380     {
2381         // nothing to do: return true if there was really nothing to do and
2382         // false if we failed to set bg colour
2383         return !style.HasBackgroundColour();
2384     }
2385
2386     // order the range if needed
2387     if ( start > end )
2388     {
2389         long tmp = start;
2390         start = end;
2391         end = tmp;
2392     }
2393
2394     // we can only change the format of the selection, so select the range we
2395     // want and restore the old selection later
2396     long startOld, endOld;
2397     GetSelection(&startOld, &endOld);
2398
2399     // but do we really have to change the selection?
2400     bool changeSel = start != startOld || end != endOld;
2401
2402     if ( changeSel )
2403     {
2404         DoSetSelection(start, end, SetSel_NoScroll);
2405     }
2406
2407     // initialize CHARFORMAT struct
2408 #if wxUSE_RICHEDIT2
2409     CHARFORMAT2 cf;
2410 #else
2411     CHARFORMAT cf;
2412 #endif
2413
2414     wxZeroMemory(cf);
2415
2416     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2417     // CHARFORMAT in that case
2418 #if wxUSE_RICHEDIT2
2419     if ( m_verRichEdit == 1 )
2420     {
2421         // this is the only thing the control is going to grok
2422         cf.cbSize = sizeof(CHARFORMAT);
2423     }
2424     else
2425 #endif
2426     {
2427         // CHARFORMAT or CHARFORMAT2
2428         cf.cbSize = sizeof(cf);
2429     }
2430
2431     if ( style.HasFont() )
2432     {
2433         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
2434         //     but using it doesn't seem to hurt neither so leaving it for now
2435
2436         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
2437                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
2438
2439         // fill in data from LOGFONT but recalculate lfHeight because we need
2440         // the real height in twips and not the negative number which
2441         // wxFillLogFont() returns (this is correct in general and works with
2442         // the Windows font mapper, but not here)
2443
2444         wxFont font(style.GetFont());
2445
2446         LOGFONT lf;
2447         wxFillLogFont(&lf, &font);
2448         cf.yHeight = 20*font.GetPointSize(); // 1 pt = 20 twips
2449         cf.bCharSet = lf.lfCharSet;
2450         cf.bPitchAndFamily = lf.lfPitchAndFamily;
2451         wxStrlcpy(cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName));
2452
2453         // also deal with underline/italic/bold attributes: note that we must
2454         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
2455         // style to allow clearing it
2456         if ( lf.lfItalic )
2457         {
2458             cf.dwEffects |= CFE_ITALIC;
2459         }
2460
2461         if ( lf.lfWeight == FW_BOLD )
2462         {
2463             cf.dwEffects |= CFE_BOLD;
2464         }
2465
2466         if ( lf.lfUnderline )
2467         {
2468             cf.dwEffects |= CFE_UNDERLINE;
2469         }
2470
2471         // strikeout fonts are not supported by wxWidgets
2472     }
2473
2474     if ( style.HasTextColour() )
2475     {
2476         cf.dwMask |= CFM_COLOR;
2477         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2478     }
2479
2480 #if wxUSE_RICHEDIT2
2481     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2482     {
2483         cf.dwMask |= CFM_BACKCOLOR;
2484         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2485     }
2486 #endif // wxUSE_RICHEDIT2
2487
2488     // do format the selection
2489     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
2490                             SCF_SELECTION, (LPARAM)&cf) != 0;
2491     if ( !ok )
2492     {
2493         wxLogDebug(wxT("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
2494     }
2495
2496     // now do the paragraph formatting
2497     PARAFORMAT2 pf;
2498     wxZeroMemory(pf);
2499     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2500     // PARAFORMAT in that case
2501 #if wxUSE_RICHEDIT2
2502     if ( m_verRichEdit == 1 )
2503     {
2504         // this is the only thing the control is going to grok
2505         pf.cbSize = sizeof(PARAFORMAT);
2506     }
2507     else
2508 #endif
2509     {
2510         // PARAFORMAT or PARAFORMAT2
2511         pf.cbSize = sizeof(pf);
2512     }
2513
2514     if (style.HasAlignment())
2515     {
2516         pf.dwMask |= PFM_ALIGNMENT;
2517         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2518             pf.wAlignment = PFA_RIGHT;
2519         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2520             pf.wAlignment = PFA_CENTER;
2521         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2522             pf.wAlignment = PFA_JUSTIFY;
2523         else
2524             pf.wAlignment = PFA_LEFT;
2525     }
2526
2527     if (style.HasLeftIndent())
2528     {
2529         pf.dwMask |= PFM_STARTINDENT | PFM_OFFSET;
2530
2531         // Convert from 1/10 mm to TWIPS
2532         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2533         pf.dxOffset = (int) (((double) style.GetLeftSubIndent()) * mm2twips / 10.0) ;
2534     }
2535
2536     if (style.HasRightIndent())
2537     {
2538         pf.dwMask |= PFM_RIGHTINDENT;
2539
2540         // Convert from 1/10 mm to TWIPS
2541         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2542     }
2543
2544     if (style.HasTabs())
2545     {
2546         pf.dwMask |= PFM_TABSTOPS;
2547
2548         const wxArrayInt& tabs = style.GetTabs();
2549
2550         pf.cTabCount = (SHORT)wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2551         size_t i;
2552         for (i = 0; i < (size_t) pf.cTabCount; i++)
2553         {
2554             // Convert from 1/10 mm to TWIPS
2555             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2556         }
2557     }
2558
2559 #if wxUSE_RICHEDIT2
2560     if ( m_verRichEdit > 1 )
2561     {
2562         if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft )
2563         {
2564             // Use RTL paragraphs in RTL mode to get proper layout
2565             pf.dwMask |= PFM_RTLPARA;
2566             pf.wEffects |= PFE_RTLPARA;
2567         }
2568     }
2569 #endif // wxUSE_RICHEDIT2
2570
2571     if ( pf.dwMask )
2572     {
2573         // do format the selection
2574         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2575                                 0, (LPARAM) &pf) != 0;
2576         if ( !ok )
2577         {
2578             wxLogDebug(wxT("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2579         }
2580     }
2581
2582     if ( changeSel )
2583     {
2584         // restore the original selection
2585         DoSetSelection(startOld, endOld, SetSel_NoScroll);
2586     }
2587
2588     return ok;
2589 }
2590
2591 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2592 {
2593     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2594         return false;
2595
2596     if ( IsEditable() )
2597     {
2598         // we have to do this or the style wouldn't apply for the text typed by
2599         // the user
2600         wxTextPos posLast = GetLastPosition();
2601         SetStyle(posLast, posLast, m_defaultStyle);
2602     }
2603
2604     return true;
2605 }
2606
2607 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2608 {
2609     if ( !IsRich() )
2610     {
2611         // can't do it with normal text control
2612         return false;
2613     }
2614
2615     // initialize CHARFORMAT struct
2616 #if wxUSE_RICHEDIT2
2617     CHARFORMAT2 cf;
2618 #else
2619     CHARFORMAT cf;
2620 #endif
2621
2622     wxZeroMemory(cf);
2623
2624     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2625     // CHARFORMAT in that case
2626 #if wxUSE_RICHEDIT2
2627     if ( m_verRichEdit == 1 )
2628     {
2629         // this is the only thing the control is going to grok
2630         cf.cbSize = sizeof(CHARFORMAT);
2631     }
2632     else
2633 #endif
2634     {
2635         // CHARFORMAT or CHARFORMAT2
2636         cf.cbSize = sizeof(cf);
2637     }
2638     // we can only change the format of the selection, so select the range we
2639     // want and restore the old selection later
2640     long startOld, endOld;
2641     GetSelection(&startOld, &endOld);
2642
2643     // but do we really have to change the selection?
2644     bool changeSel = position != startOld || position != endOld;
2645
2646     if ( changeSel )
2647     {
2648         DoSetSelection(position, position + 1, SetSel_NoScroll);
2649     }
2650
2651     // get the selection formatting
2652     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2653                             SCF_SELECTION, (LPARAM)&cf) ;
2654
2655
2656     LOGFONT lf;
2657     lf.lfHeight = cf.yHeight;
2658     lf.lfWidth = 0;
2659     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2660     lf.lfClipPrecision = 0;
2661     lf.lfEscapement = 0;
2662     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2663
2664     //NOTE:  we _MUST_ set each of these values to _something_ since we
2665     //do not call wxZeroMemory on the LOGFONT lf
2666     if (cf.dwEffects & CFE_ITALIC)
2667         lf.lfItalic = TRUE;
2668     else
2669         lf.lfItalic = FALSE;
2670
2671     lf.lfOrientation = 0;
2672     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2673     lf.lfQuality = 0;
2674
2675     if (cf.dwEffects & CFE_STRIKEOUT)
2676         lf.lfStrikeOut = TRUE;
2677     else
2678         lf.lfStrikeOut = FALSE;
2679
2680     if (cf.dwEffects & CFE_UNDERLINE)
2681         lf.lfUnderline = TRUE;
2682     else
2683         lf.lfUnderline = FALSE;
2684
2685     if (cf.dwEffects & CFE_BOLD)
2686         lf.lfWeight = FW_BOLD;
2687     else
2688         lf.lfWeight = FW_NORMAL;
2689
2690     wxFont font = wxCreateFontFromLogFont(& lf);
2691     if (font.Ok())
2692     {
2693         style.SetFont(font);
2694     }
2695     style.SetTextColour(wxColour(cf.crTextColor));
2696
2697 #if wxUSE_RICHEDIT2
2698     if ( m_verRichEdit != 1 )
2699     {
2700         // cf.dwMask |= CFM_BACKCOLOR;
2701         style.SetBackgroundColour(wxColour(cf.crBackColor));
2702     }
2703 #endif // wxUSE_RICHEDIT2
2704
2705     // now get the paragraph formatting
2706     PARAFORMAT2 pf;
2707     wxZeroMemory(pf);
2708     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2709     // PARAFORMAT in that case
2710 #if wxUSE_RICHEDIT2
2711     if ( m_verRichEdit == 1 )
2712     {
2713         // this is the only thing the control is going to grok
2714         pf.cbSize = sizeof(PARAFORMAT);
2715     }
2716     else
2717 #endif
2718     {
2719         // PARAFORMAT or PARAFORMAT2
2720         pf.cbSize = sizeof(pf);
2721     }
2722
2723     // do format the selection
2724     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2725
2726     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0), (int) ((double) pf.dxOffset * twips2mm * 10.0) );
2727     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2728
2729     if (pf.wAlignment == PFA_CENTER)
2730         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2731     else if (pf.wAlignment == PFA_RIGHT)
2732         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2733     else if (pf.wAlignment == PFA_JUSTIFY)
2734         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2735     else
2736         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2737
2738     wxArrayInt tabStops;
2739     size_t i;
2740     for (i = 0; i < (size_t) pf.cTabCount; i++)
2741     {
2742         tabStops.Add( (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) );
2743     }
2744
2745     if ( changeSel )
2746     {
2747         // restore the original selection
2748         DoSetSelection(startOld, endOld, SetSel_NoScroll);
2749     }
2750
2751     return true;
2752 }
2753
2754 // ----------------------------------------------------------------------------
2755 // wxRichEditModule
2756 // ----------------------------------------------------------------------------
2757
2758 static const HINSTANCE INVALID_HINSTANCE = (HINSTANCE)-1;
2759
2760 bool wxRichEditModule::OnInit()
2761 {
2762     // don't do anything - we will load it when needed
2763     return true;
2764 }
2765
2766 void wxRichEditModule::OnExit()
2767 {
2768     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2769     {
2770         if ( ms_hRichEdit[i] && ms_hRichEdit[i] != INVALID_HINSTANCE )
2771         {
2772             ::FreeLibrary(ms_hRichEdit[i]);
2773             ms_hRichEdit[i] = NULL;
2774         }
2775     }
2776 #if wxUSE_INKEDIT
2777     if (ms_inkEditLib.IsLoaded())
2778         ms_inkEditLib.Unload();
2779 #endif
2780 }
2781
2782 /* static */
2783 bool wxRichEditModule::Load(Version version)
2784 {
2785     if ( ms_hRichEdit[version] == INVALID_HINSTANCE )
2786     {
2787         // we had already tried to load it and failed
2788         return false;
2789     }
2790
2791     if ( ms_hRichEdit[version] )
2792     {
2793         // we've already got this one
2794         return true;
2795     }
2796
2797     static const wxChar *const dllnames[] =
2798     {
2799         wxT("riched32"),
2800         wxT("riched20"),
2801         wxT("msftedit"),
2802     };
2803
2804     wxCOMPILE_TIME_ASSERT( WXSIZEOF(dllnames) == Version_Max,
2805                             RichEditDllNamesVersionsMismatch );
2806
2807     ms_hRichEdit[version] = ::LoadLibrary(dllnames[version]);
2808
2809     if ( !ms_hRichEdit[version] )
2810     {
2811         ms_hRichEdit[version] = INVALID_HINSTANCE;
2812
2813         return false;
2814     }
2815
2816     return true;
2817 }
2818
2819 #if wxUSE_INKEDIT
2820 // load the InkEdit library
2821 bool wxRichEditModule::LoadInkEdit()
2822 {
2823     if (ms_inkEditLibLoadAttemped)
2824         return ms_inkEditLib.IsLoaded();
2825
2826     ms_inkEditLibLoadAttemped = true;
2827
2828     wxLogNull logNull;
2829     return ms_inkEditLib.Load(wxT("inked"));
2830 }
2831 #endif // wxUSE_INKEDIT
2832
2833
2834 #endif // wxUSE_RICHEDIT
2835
2836 #endif // wxUSE_TEXTCTRL && !(__SMARTPHONE__ && __WXWINCE__)