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         ::SendMessage(GetHwnd(), WM_VSCROLL, SB_BOTTOM, NULL);
1197     }
1198 #endif // wxUSE_RICHEDIT
1199 }
1200
1201 void wxTextCtrl::Clear()
1202 {
1203     ::SetWindowText(GetHwnd(), wxEmptyString);
1204
1205     if ( IsMultiLine() && !IsRich() )
1206     {
1207         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
1208         // but the normal ones don't -- make Clear() behaviour consistent by
1209         // always sending this event
1210         SendUpdateEvent();
1211     }
1212 }
1213
1214 #ifdef __WIN32__
1215
1216 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
1217 {
1218     SetFocus();
1219
1220     size_t lenOld = GetValue().length();
1221
1222     wxUint32 code = event.GetRawKeyCode();
1223     ::keybd_event((BYTE)code, 0, 0 /* key press */, 0);
1224     ::keybd_event((BYTE)code, 0, KEYEVENTF_KEYUP, 0);
1225
1226     // assume that any alphanumeric key changes the total number of characters
1227     // in the control - this should work in 99% of cases
1228     return GetValue().length() != lenOld;
1229 }
1230
1231 #endif // __WIN32__
1232
1233 // ----------------------------------------------------------------------------
1234 // Accessors
1235 // ----------------------------------------------------------------------------
1236
1237 void wxTextCtrl::SetInsertionPointEnd()
1238 {
1239     // we must not do anything if the caret is already there because calling
1240     // SetInsertionPoint() thaws the controls if Freeze() had been called even
1241     // if it doesn't actually move the caret anywhere and so the simple fact of
1242     // doing it results in horrible flicker when appending big amounts of text
1243     // to the control in a few chunks (see DoAddText() test in the text sample)
1244     const wxTextPos lastPosition = GetLastPosition();
1245     if ( GetInsertionPoint() == lastPosition )
1246     {
1247         return;
1248     }
1249
1250     SetInsertionPoint(lastPosition);
1251 }
1252
1253 long wxTextCtrl::GetInsertionPoint() const
1254 {
1255 #if wxUSE_RICHEDIT
1256     if ( IsRich() )
1257     {
1258         CHARRANGE range;
1259         range.cpMin = 0;
1260         range.cpMax = 0;
1261         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
1262         return range.cpMin;
1263     }
1264 #endif // wxUSE_RICHEDIT
1265
1266     return wxTextEntry::GetInsertionPoint();
1267 }
1268
1269 wxTextPos wxTextCtrl::GetLastPosition() const
1270 {
1271     if ( IsMultiLine() )
1272     {
1273         int numLines = GetNumberOfLines();
1274         long posStartLastLine = XYToPosition(0, numLines - 1);
1275
1276         long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
1277
1278         return posStartLastLine + lenLastLine;
1279     }
1280
1281     return wxTextEntry::GetLastPosition();
1282 }
1283
1284 // If the return values from and to are the same, there is no
1285 // selection.
1286 void wxTextCtrl::GetSelection(long *from, long *to) const
1287 {
1288 #if wxUSE_RICHEDIT
1289     if ( IsRich() )
1290     {
1291         CHARRANGE charRange;
1292         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
1293
1294         *from = charRange.cpMin;
1295         *to = charRange.cpMax;
1296     }
1297     else
1298 #endif // !wxUSE_RICHEDIT
1299     {
1300         wxTextEntry::GetSelection(from, to);
1301     }
1302 }
1303
1304 // ----------------------------------------------------------------------------
1305 // selection
1306 // ----------------------------------------------------------------------------
1307
1308 void wxTextCtrl::DoSetSelection(long from, long to, int flags)
1309 {
1310     HWND hWnd = GetHwnd();
1311
1312 #if wxUSE_RICHEDIT
1313     if ( IsRich() )
1314     {
1315         // if from and to are both -1, it means (in wxWidgets) that all text
1316         // should be selected, translate this into Windows convention
1317         if ( (from == -1) && (to == -1) )
1318         {
1319             from = 0;
1320         }
1321
1322         CHARRANGE range;
1323         range.cpMin = from;
1324         range.cpMax = to;
1325         ::SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM)&range);
1326     }
1327     else
1328 #endif // wxUSE_RICHEDIT
1329     {
1330         wxTextEntry::DoSetSelection(from, to, flags);
1331     }
1332
1333     if ( (flags & SetSel_Scroll) && !IsFrozen() )
1334     {
1335 #if wxUSE_RICHEDIT
1336         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1337         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1338         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1339         // option is set (but it does work ok in richedit 1.0 mode...)
1340         //
1341         // so to make it work we either need to give focus to it here which
1342         // will probably create many problems (dummy focus events; window
1343         // containing the text control being brought to foreground
1344         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1345         // create other problems too -- and in fact it does because if we turn
1346         // on/off this style while appending the text to the control, the
1347         // vertical scrollbar never appears in it even if we append tons of
1348         // text and to work around this the only solution I found was to use
1349         // ES_DISABLENOSCROLL
1350         //
1351         // this is very ugly but I don't see any other way to make this work
1352         long style = 0;
1353         if ( GetRichVersion() > 1 )
1354         {
1355             if ( !HasFlag(wxTE_NOHIDESEL) )
1356             {
1357                 // setting ECO_NOHIDESEL also sets WS_VISIBLE and possibly
1358                 // others, remember the style so we can reset it later if needed
1359                 style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1360                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1361                               ECOOP_OR, ECO_NOHIDESEL);
1362             }
1363             //else: everything is already ok
1364         }
1365 #endif // wxUSE_RICHEDIT
1366
1367         ::SendMessage(hWnd, EM_SCROLLCARET, 0, (LPARAM)0);
1368
1369 #if wxUSE_RICHEDIT
1370         // restore ECO_NOHIDESEL if we changed it
1371         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1372         {
1373             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1374                           ECOOP_AND, ~ECO_NOHIDESEL);
1375             if ( style != ::GetWindowLong(GetHwnd(), GWL_STYLE) )
1376                 ::SetWindowLong(GetHwnd(), GWL_STYLE, style);
1377         }
1378 #endif // wxUSE_RICHEDIT
1379     }
1380 }
1381
1382 // ----------------------------------------------------------------------------
1383 // Working with files
1384 // ----------------------------------------------------------------------------
1385
1386 bool wxTextCtrl::DoLoadFile(const wxString& file, int fileType)
1387 {
1388     if ( wxTextCtrlBase::DoLoadFile(file, fileType) )
1389     {
1390         // update the size limit if needed
1391         AdjustSpaceLimit();
1392
1393         return true;
1394     }
1395
1396     return false;
1397 }
1398
1399 // ----------------------------------------------------------------------------
1400 // dirty status
1401 // ----------------------------------------------------------------------------
1402
1403 bool wxTextCtrl::IsModified() const
1404 {
1405     return ::SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1406 }
1407
1408 void wxTextCtrl::MarkDirty()
1409 {
1410     ::SendMessage(GetHwnd(), EM_SETMODIFY, TRUE, 0);
1411 }
1412
1413 void wxTextCtrl::DiscardEdits()
1414 {
1415     ::SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0);
1416 }
1417
1418 // ----------------------------------------------------------------------------
1419 // Positions <-> coords
1420 // ----------------------------------------------------------------------------
1421
1422 int wxTextCtrl::GetNumberOfLines() const
1423 {
1424     return (int)::SendMessage(GetHwnd(), EM_GETLINECOUNT, 0, 0);
1425 }
1426
1427 long wxTextCtrl::XYToPosition(long x, long y) const
1428 {
1429     // This gets the char index for the _beginning_ of this line
1430     long charIndex = ::SendMessage(GetHwnd(), EM_LINEINDEX, y, 0);
1431
1432     return charIndex + x;
1433 }
1434
1435 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1436 {
1437     HWND hWnd = GetHwnd();
1438
1439     // This gets the line number containing the character
1440     long lineNo;
1441 #if wxUSE_RICHEDIT
1442     if ( IsRich() )
1443     {
1444         lineNo = ::SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, pos);
1445     }
1446     else
1447 #endif // wxUSE_RICHEDIT
1448     {
1449         lineNo = ::SendMessage(hWnd, EM_LINEFROMCHAR, pos, 0);
1450     }
1451
1452     if ( lineNo == -1 )
1453     {
1454         // no such line
1455         return false;
1456     }
1457
1458     // This gets the char index for the _beginning_ of this line
1459     long charIndex = ::SendMessage(hWnd, EM_LINEINDEX, lineNo, 0);
1460     if ( charIndex == -1 )
1461     {
1462         return false;
1463     }
1464
1465     // The X position must therefore be the different between pos and charIndex
1466     if ( x )
1467         *x = pos - charIndex;
1468     if ( y )
1469         *y = lineNo;
1470
1471     return true;
1472 }
1473
1474 wxTextCtrlHitTestResult
1475 wxTextCtrl::HitTest(const wxPoint& pt, long *posOut) const
1476 {
1477     // first get the position from Windows
1478     LPARAM lParam;
1479
1480 #if wxUSE_RICHEDIT
1481     POINTL ptl;
1482     if ( IsRich() )
1483     {
1484         // for rich edit controls the position is passed iva the struct fields
1485         ptl.x = pt.x;
1486         ptl.y = pt.y;
1487         lParam = (LPARAM)&ptl;
1488     }
1489     else
1490 #endif // wxUSE_RICHEDIT
1491     {
1492         // for the plain ones, we are limited to 16 bit positions which are
1493         // combined in a single 32 bit value
1494         lParam = MAKELPARAM(pt.x, pt.y);
1495     }
1496
1497     LRESULT pos = ::SendMessage(GetHwnd(), EM_CHARFROMPOS, 0, lParam);
1498
1499     if ( pos == -1 )
1500     {
1501         // this seems to indicate an error...
1502         return wxTE_HT_UNKNOWN;
1503     }
1504
1505 #if wxUSE_RICHEDIT
1506     if ( !IsRich() )
1507 #endif // wxUSE_RICHEDIT
1508     {
1509         // for plain EDIT controls the higher word contains something else
1510         pos = LOWORD(pos);
1511     }
1512
1513
1514     // next determine where it is relatively to our point: EM_CHARFROMPOS
1515     // always returns the closest character but we need to be more precise, so
1516     // double check that we really are where it pretends
1517     POINTL ptReal;
1518
1519 #if wxUSE_RICHEDIT
1520     // FIXME: we need to distinguish between richedit 2 and 3 here somehow but
1521     //        we don't know how to do it
1522     if ( IsRich() )
1523     {
1524         ::SendMessage(GetHwnd(), EM_POSFROMCHAR, (WPARAM)&ptReal, pos);
1525     }
1526     else
1527 #endif // wxUSE_RICHEDIT
1528     {
1529         LRESULT lRc = ::SendMessage(GetHwnd(), EM_POSFROMCHAR, pos, 0);
1530
1531         if ( lRc == -1 )
1532         {
1533             // this is apparently returned when pos corresponds to the last
1534             // position
1535             ptReal.x =
1536             ptReal.y = 0;
1537         }
1538         else
1539         {
1540             ptReal.x = LOWORD(lRc);
1541             ptReal.y = HIWORD(lRc);
1542         }
1543     }
1544
1545     wxTextCtrlHitTestResult rc;
1546
1547     if ( pt.y > ptReal.y + GetCharHeight() )
1548         rc = wxTE_HT_BELOW;
1549     else if ( pt.x > ptReal.x + GetCharWidth() )
1550         rc = wxTE_HT_BEYOND;
1551     else
1552         rc = wxTE_HT_ON_TEXT;
1553
1554     if ( posOut )
1555         *posOut = pos;
1556
1557     return rc;
1558 }
1559
1560 // ----------------------------------------------------------------------------
1561 //
1562 // ----------------------------------------------------------------------------
1563
1564 void wxTextCtrl::ShowPosition(long pos)
1565 {
1566     HWND hWnd = GetHwnd();
1567
1568     // To scroll to a position, we pass the number of lines and characters
1569     // to scroll *by*. This means that we need to:
1570     // (1) Find the line position of the current line.
1571     // (2) Find the line position of pos.
1572     // (3) Scroll by (pos - current).
1573     // For now, ignore the horizontal scrolling.
1574
1575     // Is this where scrolling is relative to - the line containing the caret?
1576     // Or is the first visible line??? Try first visible line.
1577 //    int currentLineLineNo1 = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, -1, 0L);
1578
1579     int currentLineLineNo = (int)::SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, 0, 0);
1580
1581     int specifiedLineLineNo = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, pos, 0);
1582
1583     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1584
1585     if (linesToScroll != 0)
1586       ::SendMessage(hWnd, EM_LINESCROLL, 0, linesToScroll);
1587 }
1588
1589 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1590 {
1591     return ::SendMessage(GetHwnd(), EM_LINELENGTH, pos, 0);
1592 }
1593
1594 int wxTextCtrl::GetLineLength(long lineNo) const
1595 {
1596     long pos = XYToPosition(0, lineNo);
1597
1598     return GetLengthOfLineContainingPos(pos);
1599 }
1600
1601 wxString wxTextCtrl::GetLineText(long lineNo) const
1602 {
1603     size_t len = (size_t)GetLineLength(lineNo) + 1;
1604
1605     // there must be at least enough place for the length WORD in the
1606     // buffer
1607     len += sizeof(WORD);
1608
1609     wxString str;
1610     {
1611         wxStringBufferLength tmp(str, len);
1612         wxChar *buf = tmp;
1613
1614         *(WORD *)buf = (WORD)len;
1615         len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1616
1617 #if wxUSE_RICHEDIT
1618         if ( IsRich() )
1619         {
1620             // remove the '\r' returned by the rich edit control, the user code
1621             // should never see it
1622             if ( buf[len - 2] == wxT('\r') && buf[len - 1] == wxT('\n') )
1623             {
1624                 // richedit 1.0 uses "\r\n" as line terminator, so remove "\r"
1625                 // here and "\n" below
1626                 buf[len - 2] = wxT('\n');
1627                 len--;
1628             }
1629             else if ( buf[len - 1] == wxT('\r') )
1630             {
1631                 // richedit 2.0+ uses only "\r", replace it with "\n"
1632                 buf[len - 1] = wxT('\n');
1633             }
1634         }
1635 #endif // wxUSE_RICHEDIT
1636
1637         // remove the '\n' at the end, if any (this is how this function is
1638         // supposed to work according to the docs)
1639         if ( buf[len - 1] == wxT('\n') )
1640         {
1641             len--;
1642         }
1643
1644         buf[len] = 0;
1645         tmp.SetLength(len);
1646     }
1647
1648     return str;
1649 }
1650
1651 void wxTextCtrl::SetMaxLength(unsigned long len)
1652 {
1653 #if wxUSE_RICHEDIT
1654     if ( IsRich() )
1655     {
1656         ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, len ? len : 0x7fffffff);
1657     }
1658     else
1659 #endif // wxUSE_RICHEDIT
1660     {
1661         wxTextEntry::SetMaxLength(len);
1662     }
1663 }
1664
1665 // ----------------------------------------------------------------------------
1666 // Undo/redo
1667 // ----------------------------------------------------------------------------
1668
1669 void wxTextCtrl::Redo()
1670 {
1671 #if wxUSE_RICHEDIT
1672     if ( GetRichVersion() > 1 )
1673     {
1674         ::SendMessage(GetHwnd(), EM_REDO, 0, 0);
1675         return;
1676     }
1677 #endif // wxUSE_RICHEDIT
1678
1679     wxTextEntry::Redo();
1680 }
1681
1682 bool wxTextCtrl::CanRedo() const
1683 {
1684 #if wxUSE_RICHEDIT
1685     if ( GetRichVersion() > 1 )
1686         return ::SendMessage(GetHwnd(), EM_CANREDO, 0, 0) != 0;
1687 #endif // wxUSE_RICHEDIT
1688
1689     return wxTextEntry::CanRedo();
1690 }
1691
1692 // ----------------------------------------------------------------------------
1693 // caret handling (Windows only)
1694 // ----------------------------------------------------------------------------
1695
1696 bool wxTextCtrl::ShowNativeCaret(bool show)
1697 {
1698     if ( show != m_isNativeCaretShown )
1699     {
1700         if ( !(show ? ::ShowCaret(GetHwnd()) : ::HideCaret(GetHwnd())) )
1701         {
1702             // not an error, may simply indicate that it's not shown/hidden
1703             // yet (i.e. it had been hidden/shown 2 times before)
1704             return false;
1705         }
1706
1707         m_isNativeCaretShown = show;
1708     }
1709
1710     return true;
1711 }
1712
1713 // ----------------------------------------------------------------------------
1714 // implementation details
1715 // ----------------------------------------------------------------------------
1716
1717 void wxTextCtrl::Command(wxCommandEvent & event)
1718 {
1719     SetValue(event.GetString());
1720     ProcessCommand (event);
1721 }
1722
1723 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1724 {
1725     // By default, load the first file into the text window.
1726     if (event.GetNumberOfFiles() > 0)
1727     {
1728         LoadFile(event.GetFiles()[0]);
1729     }
1730 }
1731
1732 // ----------------------------------------------------------------------------
1733 // kbd input processing
1734 // ----------------------------------------------------------------------------
1735
1736 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* msg)
1737 {
1738     // check for our special keys here: if we don't do it and the parent frame
1739     // uses them as accelerators, they wouldn't work at all, so we disable
1740     // usual preprocessing for them
1741     if ( msg->message == WM_KEYDOWN )
1742     {
1743         const WPARAM vkey = msg->wParam;
1744         if ( HIWORD(msg->lParam) & KF_ALTDOWN )
1745         {
1746             // Alt-Backspace is accelerator for "Undo"
1747             if ( vkey == VK_BACK )
1748                 return false;
1749         }
1750         else // no Alt
1751         {
1752             // we want to process some Ctrl-foo and Shift-bar but no key
1753             // combinations without either Ctrl or Shift nor with both of them
1754             // pressed
1755             const int ctrl = wxIsCtrlDown(),
1756                       shift = wxIsShiftDown();
1757             switch ( ctrl + shift )
1758             {
1759                 default:
1760                     wxFAIL_MSG( wxT("how many modifiers have we got?") );
1761                     // fall through
1762
1763                 case 0:
1764                     if ( IsMultiLine() && vkey == VK_RETURN )
1765                         return false;
1766                     // fall through
1767                 case 2:
1768                     break;
1769
1770                 case 1:
1771                     // either Ctrl or Shift pressed
1772                     if ( ctrl )
1773                     {
1774                         switch ( vkey )
1775                         {
1776                             case 'C':
1777                             case 'V':
1778                             case 'X':
1779                             case VK_INSERT:
1780                             case VK_DELETE:
1781                             case VK_HOME:
1782                             case VK_END:
1783                                 return false;
1784                         }
1785                     }
1786                     else // Shift is pressed
1787                     {
1788                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1789                             return false;
1790                     }
1791             }
1792         }
1793     }
1794
1795     return wxControl::MSWShouldPreProcessMessage(msg);
1796 }
1797
1798 void wxTextCtrl::OnChar(wxKeyEvent& event)
1799 {
1800     switch ( event.GetKeyCode() )
1801     {
1802         case WXK_RETURN:
1803             {
1804                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1805                 InitCommandEvent(event);
1806                 event.SetString(GetValue());
1807                 if ( HandleWindowEvent(event) )
1808                 if ( !HasFlag(wxTE_MULTILINE) )
1809                     return;
1810                 //else: multiline controls need Enter for themselves
1811             }
1812             break;
1813
1814         case WXK_TAB:
1815             // ok, so this is getting absolutely ridiculous but I don't see
1816             // any other way to fix this bug: when a multiline text control is
1817             // inside a wxFrame, we need to generate the navigation event as
1818             // otherwise nothing happens at all, but when the same control is
1819             // created inside a dialog, IsDialogMessage() *does* switch focus
1820             // all by itself and so if we do it here as well, it is advanced
1821             // twice and goes to the next control... to prevent this from
1822             // happening we're doing this ugly check, the logic being that if
1823             // we don't have focus then it had been already changed to the next
1824             // control
1825             //
1826             // the right thing to do would, of course, be to understand what
1827             // the hell is IsDialogMessage() doing but this is beyond my feeble
1828             // forces at the moment unfortunately
1829             if ( !(m_windowStyle & wxTE_PROCESS_TAB))
1830             {
1831                 if ( FindFocus() == this )
1832                 {
1833                     int flags = 0;
1834                     if (!event.ShiftDown())
1835                         flags |= wxNavigationKeyEvent::IsForward ;
1836                     if (event.ControlDown())
1837                         flags |= wxNavigationKeyEvent::WinChange ;
1838                     if (Navigate(flags))
1839                         return;
1840                 }
1841             }
1842             else
1843             {
1844                 // Insert tab since calling the default Windows handler
1845                 // doesn't seem to do it
1846                 WriteText(wxT("\t"));
1847                 return;
1848             }
1849             break;
1850     }
1851
1852     // no, we didn't process it
1853     event.Skip();
1854 }
1855
1856 void wxTextCtrl::OnKeyDown(wxKeyEvent& event)
1857 {
1858     // richedit control doesn't send WM_PASTE, WM_CUT and WM_COPY messages
1859     // when Ctrl-V, X or C is pressed and this prevents wxClipboardTextEvent
1860     // from working. So we work around it by intercepting these shortcuts
1861     // ourselves and emitting clipboard events (which richedit will handle,
1862     // so everything works as before, including pasting of rich text):
1863     if ( event.GetModifiers() == wxMOD_CONTROL && IsRich() )
1864     {
1865         switch ( event.GetKeyCode() )
1866         {
1867             case 'C':
1868                 Copy();
1869                 return;
1870             case 'X':
1871                 Cut();
1872                 return;
1873             case 'V':
1874                 Paste();
1875                 return;
1876             default:
1877                 break;
1878         }
1879     }
1880
1881     // no, we didn't process it
1882     event.Skip();
1883 }
1884
1885 WXLRESULT wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1886 {
1887     WXLRESULT lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1888
1889     switch ( nMsg )
1890     {
1891         case WM_GETDLGCODE:
1892             {
1893                 // we always want the chars and the arrows: the arrows for
1894                 // navigation and the chars because we want Ctrl-C to work even
1895                 // in a read only control
1896                 long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1897
1898                 if ( IsEditable() )
1899                 {
1900                     // we may have several different cases:
1901                     // 1. normal: both TAB and ENTER are used for navigation
1902                     // 2. ctrl wants TAB for itself: ENTER is used to pass to
1903                     //    the next control in the dialog
1904                     // 3. ctrl wants ENTER for itself: TAB is used for dialog
1905                     //    navigation
1906                     // 4. ctrl wants both TAB and ENTER: Ctrl-ENTER is used to
1907                     //    go to the next control (we need some way to do it)
1908
1909                     // multiline controls should always get ENTER for themselves
1910                     if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1911                         lDlgCode |= DLGC_WANTMESSAGE;
1912
1913                     if ( HasFlag(wxTE_PROCESS_TAB) )
1914                         lDlgCode |= DLGC_WANTTAB;
1915
1916                     lRc |= lDlgCode;
1917                 }
1918                 else // !editable
1919                 {
1920                     // NB: use "=", not "|=" as the base class version returns
1921                     //     the same flags in the disabled state as usual (i.e.
1922                     //     including DLGC_WANTMESSAGE). This is strange (how
1923                     //     does it work in the native Win32 apps?) but for now
1924                     //     live with it.
1925                     lRc = lDlgCode;
1926                 }
1927             }
1928             break;
1929
1930 #if wxUSE_MENUS
1931         case WM_SETCURSOR:
1932             // rich text controls seem to have a bug and don't change the
1933             // cursor to the standard arrow one from the I-beam cursor usually
1934             // used by them even when a popup menu is shown (this works fine
1935             // for plain EDIT controls though), so explicitly work around this
1936             if ( IsRich() )
1937             {
1938                 extern wxMenu *wxCurrentPopupMenu;
1939                 if ( wxCurrentPopupMenu &&
1940                         wxCurrentPopupMenu->GetInvokingWindow() == this )
1941                     ::SetCursor(GetHcursorOf(*wxSTANDARD_CURSOR));
1942             }
1943 #endif // wxUSE_MENUS
1944     }
1945
1946     return lRc;
1947 }
1948
1949 // ----------------------------------------------------------------------------
1950 // text control event processing
1951 // ----------------------------------------------------------------------------
1952
1953 bool wxTextCtrl::SendUpdateEvent()
1954 {
1955     switch ( m_updatesCount )
1956     {
1957         case 0:
1958             // remember that we've got an update
1959             m_updatesCount++;
1960             break;
1961
1962         case 1:
1963             // we had already sent one event since the last control modification
1964             return false;
1965
1966         default:
1967             wxFAIL_MSG( wxT("unexpected wxTextCtrl::m_updatesCount value") );
1968             // fall through
1969
1970         case -1:
1971             // we hadn't updated the control ourselves, this event comes from
1972             // the user, don't need to ignore it nor update the count
1973             break;
1974
1975         case -2:
1976             // the control was updated programmatically and we do NOT want to
1977             // send events
1978             return false;
1979     }
1980
1981     return SendTextUpdatedEvent();
1982 }
1983
1984 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1985 {
1986     switch ( param )
1987     {
1988         case EN_CHANGE:
1989             SendUpdateEvent();
1990             break;
1991
1992         case EN_MAXTEXT:
1993             // the text size limit has been hit -- try to increase it
1994             if ( !AdjustSpaceLimit() )
1995             {
1996                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1997                 InitCommandEvent(event);
1998                 event.SetString(GetValue());
1999                 ProcessCommand(event);
2000             }
2001             break;
2002
2003             // the other edit notification messages are not processed (or, in
2004             // the case of EN_{SET/KILL}FOCUS were already handled at WM_SET/
2005             // KILLFOCUS level)
2006         default:
2007             return false;
2008     }
2009
2010     // processed
2011     return true;
2012 }
2013
2014 WXHBRUSH wxTextCtrl::MSWControlColor(WXHDC hDC, WXHWND hWnd)
2015 {
2016     if ( !IsEnabled() && !HasFlag(wxTE_MULTILINE) )
2017         return MSWControlColorDisabled(hDC);
2018
2019     return wxTextCtrlBase::MSWControlColor(hDC, hWnd);
2020 }
2021
2022 bool wxTextCtrl::HasSpaceLimit(unsigned int *len) const
2023 {
2024     // HACK: we try to automatically extend the limit for the amount of text
2025     //       to allow (interactively) entering more than 64Kb of text under
2026     //       Win9x but we shouldn't reset the text limit which was previously
2027     //       set explicitly with SetMaxLength()
2028     //
2029     //       Unfortunately there is no EM_GETLIMITTEXTSETBYUSER and so we don't
2030     //       know the limit we set (if any). We could solve this by storing the
2031     //       limit we set in wxTextCtrl but to save space we prefer to simply
2032     //       test here the actual limit value: we consider that SetMaxLength()
2033     //       can only be called for small values while EN_MAXTEXT is only sent
2034     //       for large values (in practice the default limit seems to be 30000
2035     //       but make it smaller just to be on the safe side)
2036     *len = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
2037     return *len < 10001;
2038
2039 }
2040
2041 bool wxTextCtrl::AdjustSpaceLimit()
2042 {
2043     unsigned int limit;
2044     if ( HasSpaceLimit(&limit) )
2045         return false;
2046
2047     unsigned int len = ::GetWindowTextLength(GetHwnd());
2048     if ( len >= limit )
2049     {
2050         // increment in 32Kb chunks
2051         SetMaxLength(len + 0x8000);
2052     }
2053
2054     // we changed the limit
2055     return true;
2056 }
2057
2058 bool wxTextCtrl::AcceptsFocusFromKeyboard() const
2059 {
2060     // we don't want focus if we can't be edited unless we're a multiline
2061     // control because then it might be still nice to get focus from keyboard
2062     // to be able to scroll it without mouse
2063     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
2064 }
2065
2066 wxSize wxTextCtrl::DoGetBestSize() const
2067 {
2068     int cx, cy;
2069     wxGetCharSize(GetHWND(), &cx, &cy, GetFont());
2070
2071     int wText = DEFAULT_ITEM_WIDTH;
2072
2073     int hText = cy;
2074     if ( m_windowStyle & wxTE_MULTILINE )
2075     {
2076         hText *= wxMax(wxMin(GetNumberOfLines(), 10), 2);
2077     }
2078     //else: for single line control everything is ok
2079
2080     // we have to add the adjustments for the control height only once, not
2081     // once per line, so do it after multiplication above
2082     hText += EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy) - cy;
2083
2084     return wxSize(wText, hText);
2085 }
2086
2087 // ----------------------------------------------------------------------------
2088 // standard handlers for standard edit menu events
2089 // ----------------------------------------------------------------------------
2090
2091 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2092 {
2093     Cut();
2094 }
2095
2096 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2097 {
2098     Copy();
2099 }
2100
2101 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2102 {
2103     Paste();
2104 }
2105
2106 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2107 {
2108     Undo();
2109 }
2110
2111 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2112 {
2113     Redo();
2114 }
2115
2116 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
2117 {
2118     RemoveSelection();
2119 }
2120
2121 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2122 {
2123     SelectAll();
2124 }
2125
2126 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2127 {
2128     event.Enable( CanCut() );
2129 }
2130
2131 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2132 {
2133     event.Enable( CanCopy() );
2134 }
2135
2136 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2137 {
2138     event.Enable( CanPaste() );
2139 }
2140
2141 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2142 {
2143     event.Enable( CanUndo() );
2144 }
2145
2146 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2147 {
2148     event.Enable( CanRedo() );
2149 }
2150
2151 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
2152 {
2153     event.Enable( HasSelection() && IsEditable() );
2154 }
2155
2156 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2157 {
2158     event.Enable( !IsEmpty() );
2159 }
2160
2161 void wxTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2162 {
2163 #if wxUSE_RICHEDIT
2164     if (IsRich())
2165     {
2166         if (!m_privateContextMenu)
2167         {
2168             m_privateContextMenu = new wxMenu;
2169             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
2170             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
2171             m_privateContextMenu->AppendSeparator();
2172             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
2173             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
2174             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
2175             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
2176             m_privateContextMenu->AppendSeparator();
2177             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
2178         }
2179         PopupMenu(m_privateContextMenu);
2180         return;
2181     }
2182     else
2183 #endif
2184     event.Skip();
2185 }
2186
2187 void wxTextCtrl::OnSetFocus(wxFocusEvent& event)
2188 {
2189     // be sure the caret remains invisible if the user had hidden it
2190     if ( !m_isNativeCaretShown )
2191     {
2192         ::HideCaret(GetHwnd());
2193     }
2194
2195     event.Skip();
2196 }
2197
2198 // the rest of the file only deals with the rich edit controls
2199 #if wxUSE_RICHEDIT
2200
2201 // ----------------------------------------------------------------------------
2202 // EN_LINK processing
2203 // ----------------------------------------------------------------------------
2204
2205 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
2206 {
2207     NMHDR *hdr = (NMHDR* )lParam;
2208     switch ( hdr->code )
2209     {
2210        case EN_MSGFILTER:
2211             {
2212                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
2213                 UINT msg = msgf->msg;
2214
2215                 // this is a bit crazy but richedit 1.0 sends us all mouse
2216                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
2217                 // generate the wxWin events for this message manually
2218                 //
2219                 // NB: in fact, this is still not totally correct as it does
2220                 //     send us WM_LBUTTONUP if the selection was cleared by the
2221                 //     last click -- so currently we get 2 events in this case,
2222                 //     but as I don't see any obvious way to check for this I
2223                 //     leave this code in place because it's still better than
2224                 //     not getting left up events at all
2225                 if ( msg == WM_LBUTTONUP )
2226                 {
2227                     WXUINT flags = msgf->wParam;
2228                     int x = GET_X_LPARAM(msgf->lParam),
2229                         y = GET_Y_LPARAM(msgf->lParam);
2230
2231                     HandleMouseEvent(msg, x, y, flags);
2232                 }
2233             }
2234
2235             // return true to process the event (and false to ignore it)
2236             return true;
2237
2238         case EN_LINK:
2239             {
2240                 const ENLINK *enlink = (ENLINK *)hdr;
2241
2242                 switch ( enlink->msg )
2243                 {
2244                     case WM_SETCURSOR:
2245                         // ok, so it is hardcoded - do we really nee to
2246                         // customize it?
2247                         {
2248                             wxCursor cur(wxCURSOR_HAND);
2249                             ::SetCursor(GetHcursorOf(cur));
2250                             *result = TRUE;
2251                             break;
2252                         }
2253
2254                     case WM_MOUSEMOVE:
2255                     case WM_LBUTTONDOWN:
2256                     case WM_LBUTTONUP:
2257                     case WM_LBUTTONDBLCLK:
2258                     case WM_RBUTTONDOWN:
2259                     case WM_RBUTTONUP:
2260                     case WM_RBUTTONDBLCLK:
2261                         // send a mouse event
2262                         {
2263                             static const wxEventType eventsMouse[] =
2264                             {
2265                                 wxEVT_MOTION,
2266                                 wxEVT_LEFT_DOWN,
2267                                 wxEVT_LEFT_UP,
2268                                 wxEVT_LEFT_DCLICK,
2269                                 wxEVT_RIGHT_DOWN,
2270                                 wxEVT_RIGHT_UP,
2271                                 wxEVT_RIGHT_DCLICK,
2272                             };
2273
2274                             // the event ids are consecutive
2275                             wxMouseEvent
2276                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
2277
2278                             InitMouseEvent(evtMouse,
2279                                            GET_X_LPARAM(enlink->lParam),
2280                                            GET_Y_LPARAM(enlink->lParam),
2281                                            enlink->wParam);
2282
2283                             wxTextUrlEvent event(m_windowId, evtMouse,
2284                                                  enlink->chrg.cpMin,
2285                                                  enlink->chrg.cpMax);
2286
2287                             InitCommandEvent(event);
2288
2289                             *result = ProcessCommand(event);
2290                         }
2291                         break;
2292                 }
2293             }
2294             return true;
2295     }
2296
2297     // not processed, leave it to the base class
2298     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
2299 }
2300
2301 #if wxUSE_DRAG_AND_DROP
2302
2303 void wxTextCtrl::SetDropTarget(wxDropTarget *dropTarget)
2304 {
2305     if ( m_dropTarget == wxRICHTEXT_DEFAULT_DROPTARGET )
2306     {
2307         // get rid of the built-in drop target
2308         ::RevokeDragDrop(GetHwnd());
2309         m_dropTarget = NULL;
2310     }
2311
2312     wxTextCtrlBase::SetDropTarget(dropTarget);
2313 }
2314
2315 #endif // wxUSE_DRAG_AND_DROP
2316
2317 // ----------------------------------------------------------------------------
2318 // colour setting for the rich edit controls
2319 // ----------------------------------------------------------------------------
2320
2321 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
2322 {
2323     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
2324     {
2325         // colour didn't really change
2326         return false;
2327     }
2328
2329     if ( IsRich() )
2330     {
2331         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
2332         // EM_SETBKGNDCOLOR additionally
2333         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
2334     }
2335
2336     return true;
2337 }
2338
2339 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
2340 {
2341     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
2342     {
2343         // colour didn't really change
2344         return false;
2345     }
2346
2347     if ( IsRich() )
2348     {
2349         // change the colour of everything
2350         CHARFORMAT cf;
2351         wxZeroMemory(cf);
2352         cf.cbSize = sizeof(cf);
2353         cf.dwMask = CFM_COLOR;
2354         cf.crTextColor = wxColourToRGB(colour);
2355         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
2356     }
2357
2358     return true;
2359 }
2360
2361 bool wxTextCtrl::SetFont(const wxFont& font)
2362 {
2363     if ( !wxTextCtrlBase::SetFont(font) )
2364         return false;
2365
2366     if ( IsRich() )
2367     {
2368         // Using WM_SETFONT doesn't work reliably with rich edit controls: as
2369         // an example, if we set a fixed width font for a richedit 4.1 control,
2370         // it's used for the ASCII characters but inserting any non-ASCII ones
2371         // switches the font to a proportional one, whether it's done
2372         // programmatically or not. So just use EM_SETCHARFORMAT for this too.
2373         wxTextAttr attr;
2374         attr.SetFont(font);
2375         SetDefaultStyle(attr);
2376     }
2377
2378     return true;
2379 }
2380
2381 // ----------------------------------------------------------------------------
2382 // styling support for rich edit controls
2383 // ----------------------------------------------------------------------------
2384
2385 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2386 {
2387     if ( !IsRich() )
2388     {
2389         // can't do it with normal text control
2390         return false;
2391     }
2392
2393     // the richedit 1.0 doesn't handle setting background colour, so don't
2394     // even try to do anything if it's the only thing we want to change
2395     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
2396         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
2397         !style.HasTabs() )
2398     {
2399         // nothing to do: return true if there was really nothing to do and
2400         // false if we failed to set bg colour
2401         return !style.HasBackgroundColour();
2402     }
2403
2404     // order the range if needed
2405     if ( start > end )
2406     {
2407         long tmp = start;
2408         start = end;
2409         end = tmp;
2410     }
2411
2412     // we can only change the format of the selection, so select the range we
2413     // want and restore the old selection later
2414     long startOld, endOld;
2415     GetSelection(&startOld, &endOld);
2416
2417     // but do we really have to change the selection?
2418     bool changeSel = start != startOld || end != endOld;
2419
2420     if ( changeSel )
2421     {
2422         DoSetSelection(start, end, SetSel_NoScroll);
2423     }
2424
2425     // initialize CHARFORMAT struct
2426 #if wxUSE_RICHEDIT2
2427     CHARFORMAT2 cf;
2428 #else
2429     CHARFORMAT cf;
2430 #endif
2431
2432     wxZeroMemory(cf);
2433
2434     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2435     // CHARFORMAT in that case
2436 #if wxUSE_RICHEDIT2
2437     if ( m_verRichEdit == 1 )
2438     {
2439         // this is the only thing the control is going to grok
2440         cf.cbSize = sizeof(CHARFORMAT);
2441     }
2442     else
2443 #endif
2444     {
2445         // CHARFORMAT or CHARFORMAT2
2446         cf.cbSize = sizeof(cf);
2447     }
2448
2449     if ( style.HasFont() )
2450     {
2451         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
2452         //     but using it doesn't seem to hurt neither so leaving it for now
2453
2454         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
2455                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
2456
2457         // fill in data from LOGFONT but recalculate lfHeight because we need
2458         // the real height in twips and not the negative number which
2459         // wxFillLogFont() returns (this is correct in general and works with
2460         // the Windows font mapper, but not here)
2461
2462         wxFont font(style.GetFont());
2463
2464         LOGFONT lf;
2465         wxFillLogFont(&lf, &font);
2466         cf.yHeight = 20*font.GetPointSize(); // 1 pt = 20 twips
2467         cf.bCharSet = lf.lfCharSet;
2468         cf.bPitchAndFamily = lf.lfPitchAndFamily;
2469         wxStrlcpy(cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName));
2470
2471         // also deal with underline/italic/bold attributes: note that we must
2472         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
2473         // style to allow clearing it
2474         if ( lf.lfItalic )
2475         {
2476             cf.dwEffects |= CFE_ITALIC;
2477         }
2478
2479         if ( lf.lfWeight == FW_BOLD )
2480         {
2481             cf.dwEffects |= CFE_BOLD;
2482         }
2483
2484         if ( lf.lfUnderline )
2485         {
2486             cf.dwEffects |= CFE_UNDERLINE;
2487         }
2488
2489         // strikeout fonts are not supported by wxWidgets
2490     }
2491
2492     if ( style.HasTextColour() )
2493     {
2494         cf.dwMask |= CFM_COLOR;
2495         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2496     }
2497
2498 #if wxUSE_RICHEDIT2
2499     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2500     {
2501         cf.dwMask |= CFM_BACKCOLOR;
2502         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2503     }
2504 #endif // wxUSE_RICHEDIT2
2505
2506     // do format the selection
2507     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
2508                             SCF_SELECTION, (LPARAM)&cf) != 0;
2509     if ( !ok )
2510     {
2511         wxLogDebug(wxT("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
2512     }
2513
2514     // now do the paragraph formatting
2515     PARAFORMAT2 pf;
2516     wxZeroMemory(pf);
2517     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2518     // PARAFORMAT in that case
2519 #if wxUSE_RICHEDIT2
2520     if ( m_verRichEdit == 1 )
2521     {
2522         // this is the only thing the control is going to grok
2523         pf.cbSize = sizeof(PARAFORMAT);
2524     }
2525     else
2526 #endif
2527     {
2528         // PARAFORMAT or PARAFORMAT2
2529         pf.cbSize = sizeof(pf);
2530     }
2531
2532     if (style.HasAlignment())
2533     {
2534         pf.dwMask |= PFM_ALIGNMENT;
2535         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2536             pf.wAlignment = PFA_RIGHT;
2537         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2538             pf.wAlignment = PFA_CENTER;
2539         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2540             pf.wAlignment = PFA_JUSTIFY;
2541         else
2542             pf.wAlignment = PFA_LEFT;
2543     }
2544
2545     if (style.HasLeftIndent())
2546     {
2547         pf.dwMask |= PFM_STARTINDENT | PFM_OFFSET;
2548
2549         // Convert from 1/10 mm to TWIPS
2550         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2551         pf.dxOffset = (int) (((double) style.GetLeftSubIndent()) * mm2twips / 10.0) ;
2552     }
2553
2554     if (style.HasRightIndent())
2555     {
2556         pf.dwMask |= PFM_RIGHTINDENT;
2557
2558         // Convert from 1/10 mm to TWIPS
2559         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2560     }
2561
2562     if (style.HasTabs())
2563     {
2564         pf.dwMask |= PFM_TABSTOPS;
2565
2566         const wxArrayInt& tabs = style.GetTabs();
2567
2568         pf.cTabCount = (SHORT)wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2569         size_t i;
2570         for (i = 0; i < (size_t) pf.cTabCount; i++)
2571         {
2572             // Convert from 1/10 mm to TWIPS
2573             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2574         }
2575     }
2576
2577 #if wxUSE_RICHEDIT2
2578     if ( m_verRichEdit > 1 )
2579     {
2580         if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft )
2581         {
2582             // Use RTL paragraphs in RTL mode to get proper layout
2583             pf.dwMask |= PFM_RTLPARA;
2584             pf.wEffects |= PFE_RTLPARA;
2585         }
2586     }
2587 #endif // wxUSE_RICHEDIT2
2588
2589     if ( pf.dwMask )
2590     {
2591         // do format the selection
2592         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2593                                 0, (LPARAM) &pf) != 0;
2594         if ( !ok )
2595         {
2596             wxLogDebug(wxT("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2597         }
2598     }
2599
2600     if ( changeSel )
2601     {
2602         // restore the original selection
2603         DoSetSelection(startOld, endOld, SetSel_NoScroll);
2604     }
2605
2606     return ok;
2607 }
2608
2609 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2610 {
2611     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2612         return false;
2613
2614     if ( IsEditable() )
2615     {
2616         // we have to do this or the style wouldn't apply for the text typed by
2617         // the user
2618         wxTextPos posLast = GetLastPosition();
2619         SetStyle(posLast, posLast, m_defaultStyle);
2620     }
2621
2622     return true;
2623 }
2624
2625 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2626 {
2627     if ( !IsRich() )
2628     {
2629         // can't do it with normal text control
2630         return false;
2631     }
2632
2633     // initialize CHARFORMAT struct
2634 #if wxUSE_RICHEDIT2
2635     CHARFORMAT2 cf;
2636 #else
2637     CHARFORMAT cf;
2638 #endif
2639
2640     wxZeroMemory(cf);
2641
2642     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2643     // CHARFORMAT in that case
2644 #if wxUSE_RICHEDIT2
2645     if ( m_verRichEdit == 1 )
2646     {
2647         // this is the only thing the control is going to grok
2648         cf.cbSize = sizeof(CHARFORMAT);
2649     }
2650     else
2651 #endif
2652     {
2653         // CHARFORMAT or CHARFORMAT2
2654         cf.cbSize = sizeof(cf);
2655     }
2656     // we can only change the format of the selection, so select the range we
2657     // want and restore the old selection later
2658     long startOld, endOld;
2659     GetSelection(&startOld, &endOld);
2660
2661     // but do we really have to change the selection?
2662     bool changeSel = position != startOld || position != endOld;
2663
2664     if ( changeSel )
2665     {
2666         DoSetSelection(position, position + 1, SetSel_NoScroll);
2667     }
2668
2669     // get the selection formatting
2670     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2671                             SCF_SELECTION, (LPARAM)&cf) ;
2672
2673
2674     LOGFONT lf;
2675     lf.lfHeight = cf.yHeight;
2676     lf.lfWidth = 0;
2677     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2678     lf.lfClipPrecision = 0;
2679     lf.lfEscapement = 0;
2680     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2681
2682     //NOTE:  we _MUST_ set each of these values to _something_ since we
2683     //do not call wxZeroMemory on the LOGFONT lf
2684     if (cf.dwEffects & CFE_ITALIC)
2685         lf.lfItalic = TRUE;
2686     else
2687         lf.lfItalic = FALSE;
2688
2689     lf.lfOrientation = 0;
2690     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2691     lf.lfQuality = 0;
2692
2693     if (cf.dwEffects & CFE_STRIKEOUT)
2694         lf.lfStrikeOut = TRUE;
2695     else
2696         lf.lfStrikeOut = FALSE;
2697
2698     if (cf.dwEffects & CFE_UNDERLINE)
2699         lf.lfUnderline = TRUE;
2700     else
2701         lf.lfUnderline = FALSE;
2702
2703     if (cf.dwEffects & CFE_BOLD)
2704         lf.lfWeight = FW_BOLD;
2705     else
2706         lf.lfWeight = FW_NORMAL;
2707
2708     wxFont font = wxCreateFontFromLogFont(& lf);
2709     if (font.Ok())
2710     {
2711         style.SetFont(font);
2712     }
2713     style.SetTextColour(wxColour(cf.crTextColor));
2714
2715 #if wxUSE_RICHEDIT2
2716     if ( m_verRichEdit != 1 )
2717     {
2718         // cf.dwMask |= CFM_BACKCOLOR;
2719         style.SetBackgroundColour(wxColour(cf.crBackColor));
2720     }
2721 #endif // wxUSE_RICHEDIT2
2722
2723     // now get the paragraph formatting
2724     PARAFORMAT2 pf;
2725     wxZeroMemory(pf);
2726     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2727     // PARAFORMAT in that case
2728 #if wxUSE_RICHEDIT2
2729     if ( m_verRichEdit == 1 )
2730     {
2731         // this is the only thing the control is going to grok
2732         pf.cbSize = sizeof(PARAFORMAT);
2733     }
2734     else
2735 #endif
2736     {
2737         // PARAFORMAT or PARAFORMAT2
2738         pf.cbSize = sizeof(pf);
2739     }
2740
2741     // do format the selection
2742     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2743
2744     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0), (int) ((double) pf.dxOffset * twips2mm * 10.0) );
2745     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2746
2747     if (pf.wAlignment == PFA_CENTER)
2748         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2749     else if (pf.wAlignment == PFA_RIGHT)
2750         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2751     else if (pf.wAlignment == PFA_JUSTIFY)
2752         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2753     else
2754         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2755
2756     wxArrayInt tabStops;
2757     size_t i;
2758     for (i = 0; i < (size_t) pf.cTabCount; i++)
2759     {
2760         tabStops.Add( (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) );
2761     }
2762
2763     if ( changeSel )
2764     {
2765         // restore the original selection
2766         DoSetSelection(startOld, endOld, SetSel_NoScroll);
2767     }
2768
2769     return true;
2770 }
2771
2772 // ----------------------------------------------------------------------------
2773 // wxRichEditModule
2774 // ----------------------------------------------------------------------------
2775
2776 static const HINSTANCE INVALID_HINSTANCE = (HINSTANCE)-1;
2777
2778 bool wxRichEditModule::OnInit()
2779 {
2780     // don't do anything - we will load it when needed
2781     return true;
2782 }
2783
2784 void wxRichEditModule::OnExit()
2785 {
2786     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2787     {
2788         if ( ms_hRichEdit[i] && ms_hRichEdit[i] != INVALID_HINSTANCE )
2789         {
2790             ::FreeLibrary(ms_hRichEdit[i]);
2791             ms_hRichEdit[i] = NULL;
2792         }
2793     }
2794 #if wxUSE_INKEDIT
2795     if (ms_inkEditLib.IsLoaded())
2796         ms_inkEditLib.Unload();
2797 #endif
2798 }
2799
2800 /* static */
2801 bool wxRichEditModule::Load(Version version)
2802 {
2803     if ( ms_hRichEdit[version] == INVALID_HINSTANCE )
2804     {
2805         // we had already tried to load it and failed
2806         return false;
2807     }
2808
2809     if ( ms_hRichEdit[version] )
2810     {
2811         // we've already got this one
2812         return true;
2813     }
2814
2815     static const wxChar *const dllnames[] =
2816     {
2817         wxT("riched32"),
2818         wxT("riched20"),
2819         wxT("msftedit"),
2820     };
2821
2822     wxCOMPILE_TIME_ASSERT( WXSIZEOF(dllnames) == Version_Max,
2823                             RichEditDllNamesVersionsMismatch );
2824
2825     ms_hRichEdit[version] = ::LoadLibrary(dllnames[version]);
2826
2827     if ( !ms_hRichEdit[version] )
2828     {
2829         ms_hRichEdit[version] = INVALID_HINSTANCE;
2830
2831         return false;
2832     }
2833
2834     return true;
2835 }
2836
2837 #if wxUSE_INKEDIT
2838 // load the InkEdit library
2839 bool wxRichEditModule::LoadInkEdit()
2840 {
2841     if (ms_inkEditLibLoadAttemped)
2842         return ms_inkEditLib.IsLoaded();
2843
2844     ms_inkEditLibLoadAttemped = true;
2845
2846     wxLogNull logNull;
2847     return ms_inkEditLib.Load(wxT("inked"));
2848 }
2849 #endif // wxUSE_INKEDIT
2850
2851
2852 #endif // wxUSE_RICHEDIT
2853
2854 #endif // wxUSE_TEXTCTRL && !(__SMARTPHONE__ && __WXWINCE__)