src/msw/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/textctrl.cpp
   3 // Purpose:     wxTextCtrl
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  17     #pragma implementation "textctrl.h"
  18 #endif
  19
  20 // ----------------------------------------------------------------------------
  21 // headers
  22 // ----------------------------------------------------------------------------
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_TEXTCTRL
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/textctrl.h"
  35     #include "wx/settings.h"
  36     #include "wx/brush.h"
  37     #include "wx/utils.h"
  38     #include "wx/intl.h"
  39     #include "wx/log.h"
  40     #include "wx/app.h"
  41     #include "wx/menu.h"
  42 #endif
  43
  44 #include "wx/module.h"
  45
  46 #if wxUSE_CLIPBOARD
  47     #include "wx/clipbrd.h"
  48 #endif
  49
  50 #include "wx/textfile.h"
  51
  52 #include <windowsx.h>
  53
  54 #include "wx/msw/private.h"
  55 #include "wx/msw/winundef.h"
  56
  57 #include <string.h>
  58 #include <stdlib.h>
  59
  60 #ifndef __WXWINCE__
  61 #include <sys/types.h>
  62 #endif
  63
  64 #if wxUSE_RICHEDIT
  65
  66 // old mingw32 has richedit stuff directly in windows.h and doesn't have
  67 // richedit.h at all
  68 #if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__)
  69     #include <richedit.h>
  70 #endif
  71
  72 #include "wx/msw/missing.h"
  73
  74 #endif // wxUSE_RICHEDIT
  75
  76 // ----------------------------------------------------------------------------
  77 // private classes
  78 // ----------------------------------------------------------------------------
  79
  80 #if wxUSE_RICHEDIT
  81
  82 // this module initializes RichEdit DLL(s) if needed
  83 class wxRichEditModule : public wxModule
  84 {
  85 public:
  86     virtual bool OnInit();
  87     virtual void OnExit();
  88
  89     // load the richedit DLL of at least of required version
  90     static bool Load(int version = 1);
  91
  92 private:
  93     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
  94     static HINSTANCE ms_hRichEdit[2];
  95
  96     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
  97 };
  98
  99 HINSTANCE wxRichEditModule::ms_hRichEdit[2] = { NULL, NULL };
 100
 101 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 102
 103 #endif // wxUSE_RICHEDIT
 104
 105 // ----------------------------------------------------------------------------
 106 // event tables and other macros
 107 // ----------------------------------------------------------------------------
 108
 109 #if wxUSE_EXTENDED_RTTI
 110 WX_DEFINE_FLAGS( wxTextCtrlStyle )
 111
 112 wxBEGIN_FLAGS( wxTextCtrlStyle )
 113     // new style border flags, we put them first to
 114     // use them for streaming out
 115     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
 116     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
 117     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
 118     wxFLAGS_MEMBER(wxBORDER_RAISED)
 119     wxFLAGS_MEMBER(wxBORDER_STATIC)
 120     wxFLAGS_MEMBER(wxBORDER_NONE)
 121
 122     // old style border flags
 123     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
 124     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
 125     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
 126     wxFLAGS_MEMBER(wxRAISED_BORDER)
 127     wxFLAGS_MEMBER(wxSTATIC_BORDER)
 128     wxFLAGS_MEMBER(wxBORDER)
 129
 130     // standard window styles
 131     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
 132     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
 133     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
 134     wxFLAGS_MEMBER(wxWANTS_CHARS)
 135     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
 136     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
 137     wxFLAGS_MEMBER(wxVSCROLL)
 138     wxFLAGS_MEMBER(wxHSCROLL)
 139
 140     wxFLAGS_MEMBER(wxTE_PROCESS_ENTER)
 141     wxFLAGS_MEMBER(wxTE_PROCESS_TAB)
 142     wxFLAGS_MEMBER(wxTE_MULTILINE)
 143     wxFLAGS_MEMBER(wxTE_PASSWORD)
 144     wxFLAGS_MEMBER(wxTE_READONLY)
 145     wxFLAGS_MEMBER(wxHSCROLL)
 146     wxFLAGS_MEMBER(wxTE_RICH)
 147     wxFLAGS_MEMBER(wxTE_RICH2)
 148     wxFLAGS_MEMBER(wxTE_AUTO_URL)
 149     wxFLAGS_MEMBER(wxTE_NOHIDESEL)
 150     wxFLAGS_MEMBER(wxTE_LEFT)
 151     wxFLAGS_MEMBER(wxTE_CENTRE)
 152     wxFLAGS_MEMBER(wxTE_RIGHT)
 153     wxFLAGS_MEMBER(wxTE_DONTWRAP)
 154     wxFLAGS_MEMBER(wxTE_LINEWRAP)
 155     wxFLAGS_MEMBER(wxTE_WORDWRAP)
 156
 157 wxEND_FLAGS( wxTextCtrlStyle )
 158
 159 IMPLEMENT_DYNAMIC_CLASS_XTI(wxTextCtrl, wxControl,"wx/textctrl.h")
 160
 161 wxBEGIN_PROPERTIES_TABLE(wxTextCtrl)
 162     wxEVENT_PROPERTY( TextUpdated , wxEVT_COMMAND_TEXT_UPDATED , wxCommandEvent )
 163     wxEVENT_PROPERTY( TextEnter , wxEVT_COMMAND_TEXT_ENTER , wxCommandEvent )
 164
 165     wxPROPERTY( Font , wxFont , SetFont , GetFont  ,, 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 166         wxPROPERTY( Value , wxString , SetValue, GetValue, wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 167     wxPROPERTY_FLAGS( WindowStyle , wxTextCtrlStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 168 wxEND_PROPERTIES_TABLE()
 169
 170 wxBEGIN_HANDLERS_TABLE(wxTextCtrl)
 171 wxEND_HANDLERS_TABLE()
 172
 173 wxCONSTRUCTOR_6( wxTextCtrl , wxWindow* , Parent , wxWindowID , Id , wxString , Value , wxPoint , Position , wxSize , Size , long , WindowStyle)
 174 #else
 175 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 176 #endif
 177
 178
 179 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 180     EVT_CHAR(wxTextCtrl::OnChar)
 181     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 182
 183 #if wxUSE_RICHEDIT
 184     EVT_RIGHT_UP(wxTextCtrl::OnRightClick)
 185 #endif
 186
 187     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 188     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 189     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 190     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 191     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 192     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 193     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 194
 195     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 196     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 197     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 198     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 199     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 200     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 201     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 202
 203     EVT_SET_FOCUS(wxTextCtrl::OnSetFocus)
 204 END_EVENT_TABLE()
 205
 206 // ============================================================================
 207 // implementation
 208 // ============================================================================
 209
 210 // ----------------------------------------------------------------------------
 211 // creation
 212 // ----------------------------------------------------------------------------
 213
 214 void wxTextCtrl::Init()
 215 {
 216 #if wxUSE_RICHEDIT
 217     m_verRichEdit = 0;
 218 #endif // wxUSE_RICHEDIT
 219
 220     m_privateContextMenu = NULL;
 221     m_suppressNextUpdate = FALSE;
 222     m_isNativeCaretShown = true;
 223 }
 224
 225 wxTextCtrl::~wxTextCtrl()
 226 {
 227     if (m_privateContextMenu)
 228     {
 229         delete m_privateContextMenu;
 230         m_privateContextMenu = NULL;
 231     }
 232 }
 233
 234 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 235                         const wxString& value,
 236                         const wxPoint& pos,
 237                         const wxSize& size,
 238                         long style,
 239                         const wxValidator& validator,
 240                         const wxString& name)
 241 {
 242     // base initialization
 243     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 244         return FALSE;
 245
 246     if ( parent )
 247         parent->AddChild(this);
 248
 249     // translate wxWin style flags to MSW ones
 250     WXDWORD msStyle = MSWGetCreateWindowFlags();
 251
 252     // do create the control - either an EDIT or RICHEDIT
 253     wxString windowClass = wxT("EDIT");
 254
 255 #if wxUSE_RICHEDIT
 256     if ( m_windowStyle & wxTE_AUTO_URL )
 257     {
 258         // automatic URL detection only works in RichEdit 2.0+
 259         m_windowStyle |= wxTE_RICH2;
 260     }
 261
 262     if ( m_windowStyle & wxTE_RICH2 )
 263     {
 264         // using richedit 2.0 implies using wxTE_RICH
 265         m_windowStyle |= wxTE_RICH;
 266     }
 267
 268     // we need to load the richedit DLL before creating the rich edit control
 269     if ( m_windowStyle & wxTE_RICH )
 270     {
 271         static bool s_errorGiven = FALSE;// MT-FIXME
 272
 273         // Which version do we need? Use 1.0 by default because it is much more
 274         // like the the standard EDIT or 2.0 if explicitly requested, but use
 275         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 276         //
 277         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 278         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 279         //       should use 3.0 if available as it is the best of both worlds -
 280         //       but as I can't test it right now I don't do it (VZ)
 281 #if wxUSE_UNICODE
 282         const int verRichEdit = 2;
 283 #else // !wxUSE_UNICODE
 284         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 285 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 286
 287         // only give the error msg once if the DLL can't be loaded
 288         if ( !s_errorGiven )
 289         {
 290             // try to load the RichEdit DLL (will do nothing if already done)
 291             if ( !wxRichEditModule::Load(verRichEdit) )
 292             {
 293 #if !wxUSE_UNICODE
 294                 // try another version?
 295                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 296
 297                 if ( !wxRichEditModule::Load(verRichEdit) )
 298 #endif // wxUSE_UNICODE
 299                 {
 300                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 301
 302                     s_errorGiven = TRUE;
 303                 }
 304             }
 305         }
 306
 307         // have we managed to load any richedit version?
 308         if ( !s_errorGiven )
 309         {
 310             m_verRichEdit = verRichEdit;
 311             if ( m_verRichEdit == 1 )
 312             {
 313                 windowClass = wxT("RICHEDIT");
 314             }
 315             else
 316             {
 317 #ifndef RICHEDIT_CLASS
 318                 wxString RICHEDIT_CLASS;
 319                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 320 #if wxUSE_UNICODE
 321                 RICHEDIT_CLASS += _T('W');
 322 #else // ANSI
 323                 RICHEDIT_CLASS += _T('A');
 324 #endif // Unicode/ANSI
 325 #endif // !RICHEDIT_CLASS
 326
 327                 windowClass = RICHEDIT_CLASS;
 328             }
 329         }
 330     }
 331 #endif // wxUSE_RICHEDIT
 332
 333     // we need to turn '\n's into "\r\n"s for the multiline controls
 334     wxString valueWin;
 335     if ( m_windowStyle & wxTE_MULTILINE )
 336     {
 337         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 338     }
 339     else // single line
 340     {
 341         valueWin = value;
 342     }
 343
 344     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 345         return FALSE;
 346
 347     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 348
 349 #if wxUSE_RICHEDIT
 350     if ( IsRich() )
 351     {
 352         // enable the events we're interested in: we want to get EN_CHANGE as
 353         // for the normal controls
 354         LPARAM mask = ENM_CHANGE;
 355
 356         if ( GetRichVersion() == 1 )
 357         {
 358             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 359             // explained in its handler
 360            mask |= ENM_MOUSEEVENTS;
 361         }
 362         else if ( m_windowStyle & wxTE_AUTO_URL )
 363         {
 364             mask |= ENM_LINK;
 365
 366             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 367         }
 368
 369         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 370     }
 371 #endif // wxUSE_RICHEDIT
 372
 373     return TRUE;
 374 }
 375
 376 // Make sure the window style (etc.) reflects the HWND style (roughly)
 377 void wxTextCtrl::AdoptAttributesFromHWND()
 378 {
 379     wxWindow::AdoptAttributesFromHWND();
 380
 381     HWND hWnd = GetHwnd();
 382     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 383
 384     // retrieve the style to see whether this is an edit or richedit ctrl
 385 #if wxUSE_RICHEDIT
 386     wxString classname = wxGetWindowClass(GetHWND());
 387
 388     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 389     {
 390         m_verRichEdit = 0;
 391     }
 392     else // rich edit?
 393     {
 394         wxChar c;
 395         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 396         {
 397             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 398
 399             m_verRichEdit = 0;
 400         }
 401     }
 402 #endif // wxUSE_RICHEDIT
 403
 404     if (style & ES_MULTILINE)
 405         m_windowStyle |= wxTE_MULTILINE;
 406     if (style & ES_PASSWORD)
 407         m_windowStyle |= wxTE_PASSWORD;
 408     if (style & ES_READONLY)
 409         m_windowStyle |= wxTE_READONLY;
 410     if (style & ES_WANTRETURN)
 411         m_windowStyle |= wxTE_PROCESS_ENTER;
 412     if (style & ES_CENTER)
 413         m_windowStyle |= wxTE_CENTRE;
 414     if (style & ES_RIGHT)
 415         m_windowStyle |= wxTE_RIGHT;
 416 }
 417
 418 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 419 {
 420     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 421
 422     // styles which we alaways add by default
 423     if ( style & wxTE_MULTILINE )
 424     {
 425         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 426                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 427
 428         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 429         if ( !(style & wxTE_NO_VSCROLL) )
 430         {
 431             // always adjust the vertical scrollbar automatically if we have it
 432             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 433
 434 #if wxUSE_RICHEDIT
 435             // we have to use this style for the rich edit controls because
 436             // without it the vertical scrollbar never appears at all in
 437             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 438             if ( style & wxTE_RICH2 )
 439             {
 440                 msStyle |= ES_DISABLENOSCROLL;
 441             }
 442 #endif // wxUSE_RICHEDIT
 443         }
 444
 445         style |= wxTE_PROCESS_ENTER;
 446     }
 447     else // !multiline
 448     {
 449         // there is really no reason to not have this style for single line
 450         // text controls
 451         msStyle |= ES_AUTOHSCROLL;
 452     }
 453
 454     // note that wxTE_DONTWRAP is the same as wxHSCROLL so if we have a horz
 455     // scrollbar, there is no wrapping -- which makes sense
 456     if ( style & wxTE_DONTWRAP )
 457     {
 458         // automatically scroll the control horizontally as necessary
 459         msStyle |= WS_HSCROLL;
 460     }
 461
 462     if ( style & wxTE_READONLY )
 463         msStyle |= ES_READONLY;
 464
 465     if ( style & wxTE_PASSWORD )
 466         msStyle |= ES_PASSWORD;
 467
 468     if ( style & wxTE_NOHIDESEL )
 469         msStyle |= ES_NOHIDESEL;
 470
 471     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 472     if ( style & wxTE_CENTRE )
 473         msStyle |= ES_CENTER;
 474     else if ( style & wxTE_RIGHT )
 475         msStyle |= ES_RIGHT;
 476     else
 477         msStyle |= ES_LEFT; // ES_LEFT is 0 as well but for consistency...
 478
 479     return msStyle;
 480 }
 481
 482 void wxTextCtrl::SetWindowStyleFlag(long style)
 483 {
 484 #if wxUSE_RICHEDIT
 485     // we have to deal with some styles separately because they can't be
 486     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 487     // using richedit-specific EM_SETOPTIONS
 488     if ( IsRich() &&
 489             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 490     {
 491         bool set = (style & wxTE_NOHIDESEL) != 0;
 492
 493         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 494                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 495     }
 496 #endif // wxUSE_RICHEDIT
 497
 498     wxControl::SetWindowStyleFlag(style);
 499 }
 500
 501 // ----------------------------------------------------------------------------
 502 // set/get the controls text
 503 // ----------------------------------------------------------------------------
 504
 505 wxString wxTextCtrl::GetValue() const
 506 {
 507     // range 0..-1 is special for GetRange() and means to retrieve all text
 508     return GetRange(0, -1);
 509 }
 510
 511 wxString wxTextCtrl::GetRange(long from, long to) const
 512 {
 513     wxString str;
 514
 515     if ( from >= to && to != -1 )
 516     {
 517         // nothing to retrieve
 518         return str;
 519     }
 520
 521 #if wxUSE_RICHEDIT
 522     if ( IsRich() )
 523     {
 524         int len = GetWindowTextLength(GetHwnd());
 525         if ( len > from )
 526         {
 527             if ( to == -1 )
 528                 to = len;
 529
 530 #if !wxUSE_UNICODE
 531             // we must use EM_STREAMOUT if we don't want to lose all characters
 532             // not representable in the current character set (EM_GETTEXTRANGE
 533             // simply replaces them with question marks...)
 534             if ( GetRichVersion() > 1 )
 535             {
 536                 // we must have some encoding, otherwise any 8bit chars in the
 537                 // control are simply *lost* (replaced by '?')
 538                 wxFontEncoding encoding = wxFONTENCODING_SYSTEM;
 539
 540                 wxFont font = m_defaultStyle.GetFont();
 541                 if ( !font.Ok() )
 542                     font = GetFont();
 543
 544                 if ( font.Ok() )
 545                 {
 546                    encoding = font.GetEncoding();
 547                 }
 548
 549                 if ( encoding == wxFONTENCODING_SYSTEM )
 550                 {
 551                     encoding = wxLocale::GetSystemEncoding();
 552                 }
 553
 554                 if ( encoding == wxFONTENCODING_SYSTEM )
 555                 {
 556                     encoding = wxFONTENCODING_ISO8859_1;
 557                 }
 558
 559                 str = StreamOut(encoding);
 560
 561                 if ( !str.empty() )
 562                 {
 563                     // we have to manually extract the required part, luckily
 564                     // this is easy in this case as EOL characters in str are
 565                     // just LFs because we remove CRs in wxRichEditStreamOut
 566                     str = str.Mid(from, to - from);
 567                 }
 568             }
 569
 570             // StreamOut() wasn't used or failed, try to do it in normal way
 571             if ( str.empty() )
 572 #endif // !wxUSE_UNICODE
 573             {
 574                 // alloc one extra WORD as needed by the control
 575                 wxStringBuffer tmp(str, ++len);
 576                 wxChar *p = tmp;
 577
 578                 TEXTRANGE textRange;
 579                 textRange.chrg.cpMin = from;
 580                 textRange.chrg.cpMax = to;
 581                 textRange.lpstrText = p;
 582
 583                 (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE,
 584                                   0, (LPARAM)&textRange);
 585
 586                 if ( m_verRichEdit > 1 )
 587                 {
 588                     // RichEdit 2.0 uses just CR ('\r') for the
 589                     // newlines which is neither Unix nor Windows
 590                     // style - convert it to something reasonable
 591                     for ( ; *p; p++ )
 592                     {
 593                         if ( *p == _T('\r') )
 594                             *p = _T('\n');
 595                     }
 596                 }
 597             }
 598
 599             if ( m_verRichEdit == 1 )
 600             {
 601                 // convert to the canonical form - see comment below
 602                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 603             }
 604         }
 605         //else: no text at all, leave the string empty
 606     }
 607     else
 608 #endif // wxUSE_RICHEDIT
 609     {
 610         // retrieve all text
 611         str = wxGetWindowText(GetHWND());
 612
 613         // need only a range?
 614         if ( from < to )
 615         {
 616             str = str.Mid(from, to - from);
 617         }
 618
 619         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 620         // canonical one (same one as above) for consistency with the other kinds
 621         // of controls and, more importantly, with the other ports
 622         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 623     }
 624
 625     return str;
 626 }
 627
 628 void wxTextCtrl::SetValue(const wxString& value)
 629 {
 630     // if the text is long enough, it's faster to just set it instead of first
 631     // comparing it with the old one (chances are that it will be different
 632     // anyhow, this comparison is there to avoid flicker for small single-line
 633     // edit controls mostly)
 634     if ( (value.length() > 0x400) || (value != GetValue()) )
 635     {
 636         DoWriteText(value, FALSE /* not selection only */);
 637
 638         // for compatibility, don't move the cursor when doing SetValue()
 639         SetInsertionPoint(0);
 640     }
 641     else // same text
 642     {
 643         // still send an event for consistency
 644         SendUpdateEvent();
 645     }
 646
 647     // we should reset the modified flag even if the value didn't really change
 648
 649     // mark the control as being not dirty - we changed its text, not the
 650     // user
 651     DiscardEdits();
 652 }
 653
 654 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 655
 656 // TODO: using memcpy() would improve performance a lot for big amounts of text
 657
 658 DWORD CALLBACK
 659 wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 660 {
 661     *pcb = 0;
 662
 663     const wchar_t ** const ppws = (const wchar_t **)dwCookie;
 664
 665     wchar_t *wbuf = (wchar_t *)buf;
 666     const wchar_t *wpc = *ppws;
 667     while ( cb && *wpc )
 668     {
 669         *wbuf++ = *wpc++;
 670
 671         cb -= sizeof(wchar_t);
 672         (*pcb) += sizeof(wchar_t);
 673     }
 674
 675     *ppws = wpc;
 676
 677     return 0;
 678 }
 679
 680 // helper struct used to pass parameters from wxTextCtrl to wxRichEditStreamOut
 681 struct wxStreamOutData
 682 {
 683     wchar_t *wpc;
 684     size_t len;
 685 };
 686
 687 DWORD CALLBACK
 688 wxRichEditStreamOut(DWORD_PTR dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 689 {
 690     *pcb = 0;
 691
 692     wxStreamOutData *data = (wxStreamOutData *)dwCookie;
 693
 694     const wchar_t *wbuf = (const wchar_t *)buf;
 695     wchar_t *wpc = data->wpc;
 696     while ( cb )
 697     {
 698         wchar_t wch = *wbuf++;
 699
 700         // turn "\r\n" into "\n" on the fly
 701         if ( wch != L'\r' )
 702             *wpc++ = wch;
 703         else
 704             data->len--;
 705
 706         cb -= sizeof(wchar_t);
 707         (*pcb) += sizeof(wchar_t);
 708     }
 709
 710     data->wpc = wpc;
 711
 712     return 0;
 713 }
 714
 715
 716 #if wxUSE_UNICODE_MSLU
 717     #define UNUSED_IF_MSLU(param)
 718 #else
 719     #define UNUSED_IF_MSLU(param) param
 720 #endif
 721
 722 bool
 723 wxTextCtrl::StreamIn(const wxString& value,
 724                      wxFontEncoding UNUSED_IF_MSLU(encoding),
 725                      bool selectionOnly)
 726 {
 727 #if wxUSE_UNICODE_MSLU
 728     const wchar_t *wpc = value.c_str();
 729 #else // !wxUSE_UNICODE_MSLU
 730     wxCSConv conv(encoding);
 731
 732     const size_t len = conv.MB2WC(NULL, value, value.length());
 733
 734 #if wxUSE_WCHAR_T
 735     wxWCharBuffer wchBuf(len);
 736     wchar_t *wpc = wchBuf.data();
 737 #else
 738     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 739     wchar_t *wpc = wchBuf;
 740 #endif
 741
 742     conv.MB2WC(wpc, value, value.length());
 743 #endif // wxUSE_UNICODE_MSLU
 744
 745     // finally, stream it in the control
 746     EDITSTREAM eds;
 747     wxZeroMemory(eds);
 748     eds.dwCookie = (DWORD)&wpc;
 749     // the cast below is needed for broken (very) old mingw32 headers
 750     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 751
 752     // we're going to receive 2 EN_CHANGE notifications if we got any selection
 753     // (same problem as in DoWriteText())
 754     if ( selectionOnly && HasSelection() )
 755     {
 756         // so suppress one of them
 757         m_suppressNextUpdate = TRUE;
 758     }
 759
 760     ::SendMessage(GetHwnd(), EM_STREAMIN,
 761                   SF_TEXT |
 762                   SF_UNICODE |
 763                   (selectionOnly ? SFF_SELECTION : 0),
 764                   (LPARAM)&eds);
 765
 766     if ( eds.dwError )
 767     {
 768         wxLogLastError(_T("EM_STREAMIN"));
 769     }
 770
 771 #if !wxUSE_WCHAR_T
 772     free(wchBuf);
 773 #endif // !wxUSE_WCHAR_T
 774
 775     return TRUE;
 776 }
 777
 778 #if !wxUSE_UNICODE_MSLU
 779
 780 wxString
 781 wxTextCtrl::StreamOut(wxFontEncoding encoding, bool selectionOnly) const
 782 {
 783     wxString out;
 784
 785     const int len = GetWindowTextLength(GetHwnd());
 786
 787 #if wxUSE_WCHAR_T
 788     wxWCharBuffer wchBuf(len);
 789     wchar_t *wpc = wchBuf.data();
 790 #else
 791     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 792     wchar_t *wpc = wchBuf;
 793 #endif
 794
 795     wxStreamOutData data;
 796     data.wpc = wpc;
 797     data.len = len;
 798
 799     EDITSTREAM eds;
 800     wxZeroMemory(eds);
 801     eds.dwCookie = (DWORD)&data;
 802     eds.pfnCallback = wxRichEditStreamOut;
 803
 804     ::SendMessage
 805       (
 806         GetHwnd(),
 807         EM_STREAMOUT,
 808         SF_TEXT | SF_UNICODE | (selectionOnly ? SFF_SELECTION : 0),
 809         (LPARAM)&eds
 810       );
 811
 812     if ( eds.dwError )
 813     {
 814         wxLogLastError(_T("EM_STREAMOUT"));
 815     }
 816     else // streamed out ok
 817     {
 818         // NUL-terminate the string because its length could have been
 819         // decreased by wxRichEditStreamOut
 820         *(wchBuf.data() + data.len) = L'\0';
 821
 822         // now convert to the given encoding (this is a possibly lossful
 823         // conversion but what else can we do)
 824         wxCSConv conv(encoding);
 825         size_t lenNeeded = conv.WC2MB(NULL, wchBuf, 0);
 826         if ( lenNeeded++ )
 827         {
 828             conv.WC2MB(wxStringBuffer(out, lenNeeded), wchBuf, lenNeeded);
 829         }
 830     }
 831
 832 #if !wxUSE_WCHAR_T
 833     free(wchBuf);
 834 #endif // !wxUSE_WCHAR_T
 835
 836     return out;
 837 }
 838
 839 #endif // !wxUSE_UNICODE_MSLU
 840
 841 #endif // wxUSE_RICHEDIT
 842
 843 void wxTextCtrl::WriteText(const wxString& value)
 844 {
 845     DoWriteText(value);
 846 }
 847
 848 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 849 {
 850     wxString valueDos;
 851     if ( m_windowStyle & wxTE_MULTILINE )
 852         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 853     else
 854         valueDos = value;
 855
 856 #if wxUSE_RICHEDIT
 857     // there are several complications with the rich edit controls here
 858     bool done = FALSE;
 859     if ( IsRich() )
 860     {
 861         // first, ensure that the new text will be in the default style
 862         if ( !m_defaultStyle.IsDefault() )
 863         {
 864             long start, end;
 865             GetSelection(&start, &end);
 866             SetStyle(start, end, m_defaultStyle);
 867         }
 868
 869 #if wxUSE_UNICODE_MSLU
 870         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 871         // but EM_STREAMIN works
 872         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 873         {
 874            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 875         }
 876 #endif // wxUSE_UNICODE_MSLU
 877
 878 #if !wxUSE_UNICODE
 879         // next check if the text we're inserting must be shown in a non
 880         // default charset -- this only works for RichEdit > 1.0
 881         if ( GetRichVersion() > 1 )
 882         {
 883             wxFont font = m_defaultStyle.GetFont();
 884             if ( !font.Ok() )
 885                 font = GetFont();
 886
 887             if ( font.Ok() )
 888             {
 889                wxFontEncoding encoding = font.GetEncoding();
 890                if ( encoding != wxFONTENCODING_SYSTEM )
 891                {
 892                    // we have to use EM_STREAMIN to force richedit control 2.0+
 893                    // to show any text in the non default charset -- otherwise
 894                    // it thinks it knows better than we do and always shows it
 895                    // in the default one
 896                    done = StreamIn(valueDos, encoding, selectionOnly);
 897                }
 898             }
 899         }
 900 #endif // !wxUSE_UNICODE
 901     }
 902
 903     if ( !done )
 904 #endif // wxUSE_RICHEDIT
 905     {
 906         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
 907         // call below which is confusing for the client code and so should be
 908         // avoided
 909         //
 910         // these cases are: (a) plain EDIT controls if EM_REPLACESEL is used
 911         // and there is a non empty selection currently and (b) rich text
 912         // controls in any case
 913         if (
 914 #if wxUSE_RICHEDIT
 915             IsRich() ||
 916 #endif // wxUSE_RICHEDIT
 917             (selectionOnly && HasSelection()) )
 918         {
 919             m_suppressNextUpdate = TRUE;
 920         }
 921
 922         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 923                       0, (LPARAM)valueDos.c_str());
 924
 925         // OTOH, non rich text controls don't generate any events at all when
 926         // we use WM_SETTEXT -- have to emulate them here
 927         if ( !selectionOnly
 928 #if wxUSE_RICHEDIT
 929                 && !IsRich()
 930 #endif // wxUSE_RICHEDIT
 931            )
 932         {
 933             // Windows already sends an update event for single-line
 934             // controls.
 935             if ( m_windowStyle & wxTE_MULTILINE )
 936                 SendUpdateEvent();
 937         }
 938     }
 939
 940     AdjustSpaceLimit();
 941 }
 942
 943 void wxTextCtrl::AppendText(const wxString& text)
 944 {
 945     SetInsertionPointEnd();
 946
 947     WriteText(text);
 948
 949 #if wxUSE_RICHEDIT
 950     if ( IsMultiLine() && GetRichVersion() > 1 )
 951     {
 952         // setting the caret to the end and showing it simply doesn't work for
 953         // RichEdit 2.0 -- force it to still do what we want
 954         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
 955     }
 956 #endif // wxUSE_RICHEDIT
 957 }
 958
 959 void wxTextCtrl::Clear()
 960 {
 961     ::SetWindowText(GetHwnd(), wxEmptyString);
 962
 963 #if wxUSE_RICHEDIT
 964     if ( !IsRich() )
 965 #endif // wxUSE_RICHEDIT
 966     {
 967         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 968         // but the normal ones don't -- make Clear() behaviour consistent by
 969         // always sending this event
 970
 971         // Windows already sends an update event for single-line
 972         // controls.
 973         if ( m_windowStyle & wxTE_MULTILINE )
 974             SendUpdateEvent();
 975     }
 976 }
 977
 978 #ifdef __WIN32__
 979
 980 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 981 {
 982     SetFocus();
 983
 984     size_t lenOld = GetValue().length();
 985
 986     wxUint32 code = event.GetRawKeyCode();
 987     ::keybd_event(code, 0, 0 /* key press */, 0);
 988     ::keybd_event(code, 0, KEYEVENTF_KEYUP, 0);
 989
 990     // assume that any alphanumeric key changes the total number of characters
 991     // in the control - this should work in 99% of cases
 992     return GetValue().length() != lenOld;
 993 }
 994
 995 #endif // __WIN32__
 996
 997 // ----------------------------------------------------------------------------
 998 // Clipboard operations
 999 // ----------------------------------------------------------------------------
1000
1001 void wxTextCtrl::Copy()
1002 {
1003     if (CanCopy())
1004     {
1005         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
1006     }
1007 }
1008
1009 void wxTextCtrl::Cut()
1010 {
1011     if (CanCut())
1012     {
1013         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
1014     }
1015 }
1016
1017 void wxTextCtrl::Paste()
1018 {
1019     if (CanPaste())
1020     {
1021         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
1022     }
1023 }
1024
1025 bool wxTextCtrl::HasSelection() const
1026 {
1027     long from, to;
1028     GetSelection(&from, &to);
1029     return from != to;
1030 }
1031
1032 bool wxTextCtrl::CanCopy() const
1033 {
1034     // Can copy if there's a selection
1035     return HasSelection();
1036 }
1037
1038 bool wxTextCtrl::CanCut() const
1039 {
1040     return CanCopy() && IsEditable();
1041 }
1042
1043 bool wxTextCtrl::CanPaste() const
1044 {
1045     if ( !IsEditable() )
1046         return FALSE;
1047
1048 #if wxUSE_RICHEDIT
1049     if ( IsRich() )
1050     {
1051         UINT cf = 0; // 0 == any format
1052
1053         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
1054     }
1055 #endif // wxUSE_RICHEDIT
1056
1057     // Standard edit control: check for straight text on clipboard
1058     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
1059         return FALSE;
1060
1061     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
1062     ::CloseClipboard();
1063
1064     return isTextAvailable;
1065 }
1066
1067 // ----------------------------------------------------------------------------
1068 // Accessors
1069 // ----------------------------------------------------------------------------
1070
1071 void wxTextCtrl::SetEditable(bool editable)
1072 {
1073     HWND hWnd = GetHwnd();
1074     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
1075 }
1076
1077 void wxTextCtrl::SetInsertionPoint(long pos)
1078 {
1079     DoSetSelection(pos, pos);
1080 }
1081
1082 void wxTextCtrl::SetInsertionPointEnd()
1083 {
1084     // we must not do anything if the caret is already there because calling
1085     // SetInsertionPoint() thaws the controls if Freeze() had been called even
1086     // if it doesn't actually move the caret anywhere and so the simple fact of
1087     // doing it results in horrible flicker when appending big amounts of text
1088     // to the control in a few chunks (see DoAddText() test in the text sample)
1089     if ( GetInsertionPoint() == GetLastPosition() )
1090         return;
1091
1092     long pos;
1093
1094 #if wxUSE_RICHEDIT
1095     if ( m_verRichEdit == 1 )
1096     {
1097         // we don't have to waste time calling GetLastPosition() in this case
1098         pos = -1;
1099     }
1100     else // !RichEdit 1.0
1101 #endif // wxUSE_RICHEDIT
1102     {
1103         pos = GetLastPosition();
1104     }
1105
1106     SetInsertionPoint(pos);
1107 }
1108
1109 long wxTextCtrl::GetInsertionPoint() const
1110 {
1111 #if wxUSE_RICHEDIT
1112     if ( IsRich() )
1113     {
1114         CHARRANGE range;
1115         range.cpMin = 0;
1116         range.cpMax = 0;
1117         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
1118         return range.cpMin;
1119     }
1120 #endif // wxUSE_RICHEDIT
1121
1122     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
1123     return Pos & 0xFFFF;
1124 }
1125
1126 long wxTextCtrl::GetLastPosition() const
1127 {
1128     int numLines = GetNumberOfLines();
1129     long posStartLastLine = XYToPosition(0, numLines - 1);
1130
1131     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
1132
1133     return posStartLastLine + lenLastLine;
1134 }
1135
1136 // If the return values from and to are the same, there is no
1137 // selection.
1138 void wxTextCtrl::GetSelection(long* from, long* to) const
1139 {
1140 #if wxUSE_RICHEDIT
1141     if ( IsRich() )
1142     {
1143         CHARRANGE charRange;
1144         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
1145
1146         *from = charRange.cpMin;
1147         *to = charRange.cpMax;
1148     }
1149     else
1150 #endif // !wxUSE_RICHEDIT
1151     {
1152         DWORD dwStart, dwEnd;
1153         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
1154
1155         *from = dwStart;
1156         *to = dwEnd;
1157     }
1158 }
1159
1160 bool wxTextCtrl::IsEditable() const
1161 {
1162     // strangely enough, we may be called before the control is created: our
1163     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
1164     // us
1165     if ( !m_hWnd )
1166         return TRUE;
1167
1168     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1169
1170     return (style & ES_READONLY) == 0;
1171 }
1172
1173 // ----------------------------------------------------------------------------
1174 // selection
1175 // ----------------------------------------------------------------------------
1176
1177 void wxTextCtrl::SetSelection(long from, long to)
1178 {
1179     // if from and to are both -1, it means (in wxWindows) that all text should
1180     // be selected - translate into Windows convention
1181     if ( (from == -1) && (to == -1) )
1182     {
1183         from = 0;
1184         to = -1;
1185     }
1186
1187     DoSetSelection(from, to);
1188 }
1189
1190 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
1191 {
1192     HWND hWnd = GetHwnd();
1193
1194 #if wxUSE_RICHEDIT
1195     if ( IsRich() )
1196     {
1197         CHARRANGE range;
1198         range.cpMin = from;
1199         range.cpMax = to;
1200         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
1201     }
1202     else
1203 #endif // wxUSE_RICHEDIT
1204     {
1205         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
1206     }
1207
1208     if ( scrollCaret )
1209     {
1210 #if wxUSE_RICHEDIT
1211         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1212         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1213         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1214         // option is set (but it does work ok in richedit 1.0 mode...)
1215         //
1216         // so to make it work we either need to give focus to it here which
1217         // will probably create many problems (dummy focus events; window
1218         // containing the text control being brought to foreground
1219         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1220         // create other problems too -- and in fact it does because if we turn
1221         // on/off this style while appending the text to the control, the
1222         // vertical scrollbar never appears in it even if we append tons of
1223         // text and to work around this the only solution I found was to use
1224         // ES_DISABLENOSCROLL
1225         //
1226         // this is very ugly but I don't see any other way to make this work
1227         if ( GetRichVersion() > 1 )
1228         {
1229             if ( !HasFlag(wxTE_NOHIDESEL) )
1230             {
1231                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1232                               ECOOP_OR, ECO_NOHIDESEL);
1233             }
1234             //else: everything is already ok
1235         }
1236 #endif // wxUSE_RICHEDIT
1237
1238         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1239
1240 #if wxUSE_RICHEDIT
1241         // restore ECO_NOHIDESEL if we changed it
1242         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1243         {
1244             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1245                           ECOOP_AND, ~ECO_NOHIDESEL);
1246         }
1247 #endif // wxUSE_RICHEDIT
1248     }
1249 }
1250
1251 // ----------------------------------------------------------------------------
1252 // Working with files
1253 // ----------------------------------------------------------------------------
1254
1255 bool wxTextCtrl::LoadFile(const wxString& file)
1256 {
1257     if ( wxTextCtrlBase::LoadFile(file) )
1258     {
1259         // update the size limit if needed
1260         AdjustSpaceLimit();
1261
1262         return TRUE;
1263     }
1264
1265     return FALSE;
1266 }
1267
1268 // ----------------------------------------------------------------------------
1269 // Editing
1270 // ----------------------------------------------------------------------------
1271
1272 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1273 {
1274     // Set selection and remove it
1275     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
1276
1277     DoWriteText(value, TRUE /* selection only */);
1278 }
1279
1280 void wxTextCtrl::Remove(long from, long to)
1281 {
1282     Replace(from, to, wxEmptyString);
1283 }
1284
1285 bool wxTextCtrl::IsModified() const
1286 {
1287     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1288 }
1289
1290 void wxTextCtrl::MarkDirty()
1291 {
1292     SendMessage(GetHwnd(), EM_SETMODIFY, TRUE, 0L);
1293 }
1294
1295 void wxTextCtrl::DiscardEdits()
1296 {
1297     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1298 }
1299
1300 int wxTextCtrl::GetNumberOfLines() const
1301 {
1302     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1303 }
1304
1305 // ----------------------------------------------------------------------------
1306 // Positions <-> coords
1307 // ----------------------------------------------------------------------------
1308
1309 long wxTextCtrl::XYToPosition(long x, long y) const
1310 {
1311     // This gets the char index for the _beginning_ of this line
1312     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1313
1314     return charIndex + x;
1315 }
1316
1317 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1318 {
1319     HWND hWnd = GetHwnd();
1320
1321     // This gets the line number containing the character
1322     long lineNo;
1323 #if wxUSE_RICHEDIT
1324     if ( IsRich() )
1325     {
1326         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1327     }
1328     else
1329 #endif // wxUSE_RICHEDIT
1330     {
1331         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1332     }
1333
1334     if ( lineNo == -1 )
1335     {
1336         // no such line
1337         return FALSE;
1338     }
1339
1340     // This gets the char index for the _beginning_ of this line
1341     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1342     if ( charIndex == -1 )
1343     {
1344         return FALSE;
1345     }
1346
1347     // The X position must therefore be the different between pos and charIndex
1348     if ( x )
1349         *x = pos - charIndex;
1350     if ( y )
1351         *y = lineNo;
1352
1353     return TRUE;
1354 }
1355
1356 wxTextCtrlHitTestResult
1357 wxTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *col, wxTextCoord *row) const
1358 {
1359     // first get the position from Windows
1360     LPARAM lParam;
1361
1362 #if wxUSE_RICHEDIT
1363     POINTL ptl;
1364     if ( IsRich() )
1365     {
1366         // for rich edit controls the position is passed iva the struct fields
1367         ptl.x = pt.x;
1368         ptl.y = pt.y;
1369         lParam = (LPARAM)&ptl;
1370     }
1371     else
1372 #endif // wxUSE_RICHEDIT
1373     {
1374         // for the plain ones, we are limited to 16 bit positions which are
1375         // combined in a single 32 bit value
1376         lParam = MAKELPARAM(pt.x, pt.y);
1377     }
1378
1379     LRESULT pos = SendMessage(GetHwnd(), EM_CHARFROMPOS, 0, lParam);
1380
1381     if ( pos == -1 )
1382     {
1383         // this seems to indicate an error...
1384         return wxTE_HT_UNKNOWN;
1385     }
1386
1387 #if wxUSE_RICHEDIT
1388     if ( !IsRich() )
1389 #endif // wxUSE_RICHEDIT
1390     {
1391         // for plain EDIT controls the higher word contains something else
1392         pos = LOWORD(pos);
1393     }
1394
1395
1396     // next determine where it is relatively to our point: EM_CHARFROMPOS
1397     // always returns the closest character but we need to be more precise, so
1398     // double check that we really are where it pretends
1399     POINTL ptReal;
1400
1401 #if wxUSE_RICHEDIT
1402     // FIXME: we need to distinguish between richedit 2 and 3 here somehow but
1403     //        we don't know how to do it
1404     if ( IsRich() )
1405     {
1406         SendMessage(GetHwnd(), EM_POSFROMCHAR, (WPARAM)&ptReal, pos);
1407     }
1408     else
1409 #endif // wxUSE_RICHEDIT
1410     {
1411         LRESULT lRc = SendMessage(GetHwnd(), EM_POSFROMCHAR, pos, 0);
1412
1413         if ( lRc == -1 )
1414         {
1415             // this is apparently returned when pos corresponds to the last
1416             // position
1417             ptReal.x =
1418             ptReal.y = 0;
1419         }
1420         else
1421         {
1422             ptReal.x = LOWORD(lRc);
1423             ptReal.y = HIWORD(lRc);
1424         }
1425     }
1426
1427     wxTextCtrlHitTestResult rc;
1428
1429     if ( pt.y > ptReal.y + GetCharHeight() )
1430         rc = wxTE_HT_BELOW;
1431     else if ( pt.x > ptReal.x + GetCharWidth() )
1432         rc = wxTE_HT_BEYOND;
1433     else
1434         rc = wxTE_HT_ON_TEXT;
1435
1436     // finally translate to column/row
1437     if ( !PositionToXY(pos, col, row) )
1438     {
1439         wxFAIL_MSG( _T("PositionToXY() not expected to fail in HitTest()") );
1440     }
1441
1442     return rc;
1443 }
1444
1445 // ----------------------------------------------------------------------------
1446 //
1447 // ----------------------------------------------------------------------------
1448
1449 void wxTextCtrl::ShowPosition(long pos)
1450 {
1451     HWND hWnd = GetHwnd();
1452
1453     // To scroll to a position, we pass the number of lines and characters
1454     // to scroll *by*. This means that we need to:
1455     // (1) Find the line position of the current line.
1456     // (2) Find the line position of pos.
1457     // (3) Scroll by (pos - current).
1458     // For now, ignore the horizontal scrolling.
1459
1460     // Is this where scrolling is relative to - the line containing the caret?
1461     // Or is the first visible line??? Try first visible line.
1462 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1463
1464     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1465
1466     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1467
1468     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1469
1470     if (linesToScroll != 0)
1471       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1472 }
1473
1474 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1475 {
1476     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1477 }
1478
1479 int wxTextCtrl::GetLineLength(long lineNo) const
1480 {
1481     long pos = XYToPosition(0, lineNo);
1482
1483     return GetLengthOfLineContainingPos(pos);
1484 }
1485
1486 wxString wxTextCtrl::GetLineText(long lineNo) const
1487 {
1488     size_t len = (size_t)GetLineLength(lineNo) + 1;
1489
1490     // there must be at least enough place for the length WORD in the
1491     // buffer
1492     len += sizeof(WORD);
1493
1494     wxString str;
1495     {
1496         wxStringBufferLength tmp(str, len);
1497         wxChar *buf = tmp;
1498
1499         *(WORD *)buf = (WORD)len;
1500         len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1501
1502 #if wxUSE_RICHEDIT
1503         if ( IsRich() )
1504         {
1505             // remove the '\r' returned by the rich edit control, the user code
1506             // should never see it
1507             if ( buf[len - 2] == _T('\r') && buf[len - 1] == _T('\n') )
1508             {
1509                 buf[len - 2] = _T('\n');
1510                 len--;
1511             }
1512         }
1513 #endif // wxUSE_RICHEDIT
1514
1515         // remove the '\n' at the end, if any (this is how this function is
1516         // supposed to work according to the docs)
1517         if ( buf[len - 1] == _T('\n') )
1518         {
1519             len--;
1520         }
1521
1522         buf[len] = 0;
1523         tmp.SetLength(len);
1524     }
1525
1526     return str;
1527 }
1528
1529 void wxTextCtrl::SetMaxLength(unsigned long len)
1530 {
1531     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1532 }
1533
1534 // ----------------------------------------------------------------------------
1535 // Undo/redo
1536 // ----------------------------------------------------------------------------
1537
1538 void wxTextCtrl::Undo()
1539 {
1540     if (CanUndo())
1541     {
1542         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1543     }
1544 }
1545
1546 void wxTextCtrl::Redo()
1547 {
1548     if (CanRedo())
1549     {
1550         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1551         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1552     }
1553 }
1554
1555 bool wxTextCtrl::CanUndo() const
1556 {
1557     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1558 }
1559
1560 bool wxTextCtrl::CanRedo() const
1561 {
1562     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1563 }
1564
1565 // ----------------------------------------------------------------------------
1566 // caret handling (Windows only)
1567 // ----------------------------------------------------------------------------
1568
1569 bool wxTextCtrl::ShowNativeCaret(bool show)
1570 {
1571     if ( show != m_isNativeCaretShown )
1572     {
1573         if ( !(show ? ::ShowCaret(GetHwnd()) : ::HideCaret(GetHwnd())) )
1574         {
1575             // not an error, may simply indicate that it's not shown/hidden
1576             // yet (i.e. it had been hidden/showh 2 times before)
1577             return false;
1578         }
1579
1580         m_isNativeCaretShown = show;
1581     }
1582
1583     return true;
1584 }
1585
1586 // ----------------------------------------------------------------------------
1587 // implemenation details
1588 // ----------------------------------------------------------------------------
1589
1590 void wxTextCtrl::Command(wxCommandEvent & event)
1591 {
1592     SetValue(event.GetString());
1593     ProcessCommand (event);
1594 }
1595
1596 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1597 {
1598     // By default, load the first file into the text window.
1599     if (event.GetNumberOfFiles() > 0)
1600     {
1601         LoadFile(event.GetFiles()[0]);
1602     }
1603 }
1604
1605 // ----------------------------------------------------------------------------
1606 // kbd input processing
1607 // ----------------------------------------------------------------------------
1608
1609 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1610 {
1611     MSG *msg = (MSG *)pMsg;
1612
1613     // check for our special keys here: if we don't do it and the parent frame
1614     // uses them as accelerators, they wouldn't work at all, so we disable
1615     // usual preprocessing for them
1616     if ( msg->message == WM_KEYDOWN )
1617     {
1618         WORD vkey = (WORD) msg->wParam;
1619         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1620         {
1621             if ( vkey == VK_BACK )
1622                 return FALSE;
1623         }
1624         else // no Alt
1625         {
1626             // we want to process some Ctrl-foo and Shift-bar but no key
1627             // combinations without either Ctrl or Shift nor with both of them
1628             // pressed
1629             const int ctrl = wxIsCtrlDown(),
1630                       shift = wxIsShiftDown();
1631             switch ( ctrl + shift )
1632             {
1633                 default:
1634                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1635                     // fall through
1636
1637                 case 0:
1638                 case 2:
1639                     break;
1640
1641                 case 1:
1642                     // either Ctrl or Shift pressed
1643                     if ( ctrl )
1644                     {
1645                         switch ( vkey )
1646                         {
1647                             case 'C':
1648                             case 'V':
1649                             case 'X':
1650                             case VK_INSERT:
1651                             case VK_DELETE:
1652                             case VK_HOME:
1653                             case VK_END:
1654                                 return FALSE;
1655                         }
1656                     }
1657                     else // Shift is pressed
1658                     {
1659                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1660                             return FALSE;
1661                     }
1662             }
1663         }
1664     }
1665
1666     return wxControl::MSWShouldPreProcessMessage(pMsg);
1667 }
1668
1669 void wxTextCtrl::OnChar(wxKeyEvent& event)
1670 {
1671     switch ( event.GetKeyCode() )
1672     {
1673         case WXK_RETURN:
1674             if ( !HasFlag(wxTE_MULTILINE) )
1675             {
1676                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1677                 InitCommandEvent(event);
1678                 event.SetString(GetValue());
1679                 if ( GetEventHandler()->ProcessEvent(event) )
1680                     return;
1681             }
1682             //else: multiline controls need Enter for themselves
1683
1684             break;
1685
1686         case WXK_TAB:
1687             // always produce navigation event -- even if we process TAB
1688             // ourselves the fact that we got here means that the user code
1689             // decided to skip processing of this TAB -- probably to let it
1690             // do its default job.
1691
1692             // ok, so this is getting absolutely ridiculous but I don't see
1693             // any other way to fix this bug: when a multiline text control is
1694             // inside a wxFrame, we need to generate the navigation event as
1695             // otherwise nothing happens at all, but when the same control is
1696             // created inside a dialog, IsDialogMessage() *does* switch focus
1697             // all by itself and so if we do it here as well, it is advanced
1698             // twice and goes to the next control... to prevent this from
1699             // happening we're doing this ugly check, the logic being that if
1700             // we don't have focus then it had been already changed to the next
1701             // control
1702             //
1703             // the right thing to do would, of course, be to understand what
1704             // the hell is IsDialogMessage() doing but this is beyond my feeble
1705             // forces at the moment unfortunately
1706             if ( FindFocus() == this )
1707             {
1708                 wxNavigationKeyEvent eventNav;
1709                 eventNav.SetDirection(!event.ShiftDown());
1710                 eventNav.SetWindowChange(event.ControlDown());
1711                 eventNav.SetEventObject(this);
1712
1713                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1714                     return;
1715             }
1716             break;
1717     }
1718
1719     // no, we didn't process it
1720     event.Skip();
1721 }
1722
1723 WXLRESULT wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1724 {
1725     WXLRESULT lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1726
1727     if ( nMsg == WM_GETDLGCODE )
1728     {
1729         // we always want the chars and the arrows: the arrows for navigation
1730         // and the chars because we want Ctrl-C to work even in a read only
1731         // control
1732         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1733
1734         if ( IsEditable() )
1735         {
1736             // we may have several different cases:
1737             // 1. normal case: both TAB and ENTER are used for dlg navigation
1738             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1739             //    next control in the dialog
1740             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1741             //    navigation
1742             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1743             //    to the next control
1744
1745             // the multiline edit control should always get <Return> for itself
1746             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1747                 lDlgCode |= DLGC_WANTMESSAGE;
1748
1749             if ( HasFlag(wxTE_PROCESS_TAB) )
1750                 lDlgCode |= DLGC_WANTTAB;
1751
1752             lRc |= lDlgCode;
1753         }
1754         else // !editable
1755         {
1756             // NB: use "=", not "|=" as the base class version returns the
1757             //     same flags is this state as usual (i.e. including
1758             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1759             //     native Win32 apps?) but for now live with it.
1760             lRc = lDlgCode;
1761         }
1762     }
1763
1764     return lRc;
1765 }
1766
1767 // ----------------------------------------------------------------------------
1768 // text control event processing
1769 // ----------------------------------------------------------------------------
1770
1771 bool wxTextCtrl::SendUpdateEvent()
1772 {
1773     // is event reporting suspended?
1774     if ( m_suppressNextUpdate )
1775     {
1776         // do process the next one
1777         m_suppressNextUpdate = FALSE;
1778
1779         return FALSE;
1780     }
1781
1782     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1783     InitCommandEvent(event);
1784     event.SetString(GetValue());
1785
1786     return ProcessCommand(event);
1787 }
1788
1789 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1790 {
1791     switch ( param )
1792     {
1793         case EN_SETFOCUS:
1794         case EN_KILLFOCUS:
1795             {
1796                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1797                                                          : wxEVT_SET_FOCUS,
1798                                    m_windowId);
1799                 event.SetEventObject(this);
1800                 GetEventHandler()->ProcessEvent(event);
1801             }
1802             break;
1803
1804         case EN_CHANGE:
1805             SendUpdateEvent();
1806             break;
1807
1808         case EN_MAXTEXT:
1809             // the text size limit has been hit -- try to increase it
1810             if ( !AdjustSpaceLimit() )
1811             {
1812                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1813                 InitCommandEvent(event);
1814                 event.SetString(GetValue());
1815                 ProcessCommand(event);
1816             }
1817             break;
1818
1819             // the other edit notification messages are not processed
1820         default:
1821             return FALSE;
1822     }
1823
1824     // processed
1825     return TRUE;
1826 }
1827
1828 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1829 #if wxUSE_CTL3D
1830                                WXUINT message,
1831                                WXWPARAM wParam,
1832                                WXLPARAM lParam
1833 #else
1834                                WXUINT WXUNUSED(message),
1835                                WXWPARAM WXUNUSED(wParam),
1836                                WXLPARAM WXUNUSED(lParam)
1837 #endif
1838     )
1839 {
1840 #if wxUSE_CTL3D
1841     if ( m_useCtl3D )
1842     {
1843         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1844         return (WXHBRUSH) hbrush;
1845     }
1846 #endif // wxUSE_CTL3D
1847
1848     HDC hdc = (HDC)pDC;
1849     wxColour colBack = GetBackgroundColour();
1850
1851     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1852         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1853
1854     ::SetBkColor(hdc, wxColourToRGB(colBack));
1855     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1856
1857     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1858
1859     return (WXHBRUSH)brush->GetResourceHandle();
1860 }
1861
1862 bool wxTextCtrl::AdjustSpaceLimit()
1863 {
1864     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1865
1866     // HACK: we try to automatically extend the limit for the amount of text
1867     //       to allow (interactively) entering more than 64Kb of text under
1868     //       Win9x but we shouldn't reset the text limit which was previously
1869     //       set explicitly with SetMaxLength()
1870     //
1871     //       we could solve this by storing the limit we set in wxTextCtrl but
1872     //       to save space we prefer to simply test here the actual limit
1873     //       value: we consider that SetMaxLength() can only be called for
1874     //       values < 32Kb
1875     if ( limit < 0x8000 )
1876     {
1877         // we've got more text than limit set by SetMaxLength()
1878         return FALSE;
1879     }
1880
1881     unsigned int len = ::GetWindowTextLength(GetHwnd());
1882     if ( len >= limit )
1883     {
1884         limit = len + 0x8000;    // 32Kb
1885
1886 #if wxUSE_RICHEDIT
1887         if ( IsRich() )
1888         {
1889             // as a nice side effect, this also allows passing limit > 64Kb
1890             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1891         }
1892         else
1893 #endif // wxUSE_RICHEDIT
1894         {
1895             if ( limit > 0xffff )
1896             {
1897                 // this will set it to a platform-dependent maximum (much more
1898                 // than 64Kb under NT)
1899                 limit = 0;
1900             }
1901
1902             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1903         }
1904     }
1905
1906     // we changed the limit
1907     return TRUE;
1908 }
1909
1910 bool wxTextCtrl::AcceptsFocus() const
1911 {
1912     // we don't want focus if we can't be edited unless we're a multiline
1913     // control because then it might be still nice to get focus from keyboard
1914     // to be able to scroll it without mouse
1915     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1916 }
1917
1918 wxSize wxTextCtrl::DoGetBestSize() const
1919 {
1920     int cx, cy;
1921     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1922
1923     int wText = DEFAULT_ITEM_WIDTH;
1924
1925     int hText = cy;
1926     if ( m_windowStyle & wxTE_MULTILINE )
1927     {
1928         hText *= wxMax(GetNumberOfLines(), 5);
1929     }
1930     //else: for single line control everything is ok
1931
1932     // we have to add the adjustments for the control height only once, not
1933     // once per line, so do it after multiplication above
1934     hText += EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy) - cy;
1935
1936     return wxSize(wText, hText);
1937 }
1938
1939 // ----------------------------------------------------------------------------
1940 // standard handlers for standard edit menu events
1941 // ----------------------------------------------------------------------------
1942
1943 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1944 {
1945     Cut();
1946 }
1947
1948 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1949 {
1950     Copy();
1951 }
1952
1953 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1954 {
1955     Paste();
1956 }
1957
1958 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1959 {
1960     Undo();
1961 }
1962
1963 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1964 {
1965     Redo();
1966 }
1967
1968 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
1969 {
1970     long from, to;
1971     GetSelection(& from, & to);
1972     if (from != -1 && to != -1)
1973         Remove(from, to);
1974 }
1975
1976 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1977 {
1978     SetSelection(-1, -1);
1979 }
1980
1981 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1982 {
1983     event.Enable( CanCut() );
1984 }
1985
1986 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1987 {
1988     event.Enable( CanCopy() );
1989 }
1990
1991 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1992 {
1993     event.Enable( CanPaste() );
1994 }
1995
1996 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1997 {
1998     event.Enable( CanUndo() );
1999 }
2000
2001 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2002 {
2003     event.Enable( CanRedo() );
2004 }
2005
2006 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
2007 {
2008     long from, to;
2009     GetSelection(& from, & to);
2010     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
2011 }
2012
2013 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2014 {
2015     event.Enable(GetLastPosition() > 0);
2016 }
2017
2018 void wxTextCtrl::OnRightClick(wxMouseEvent& event)
2019 {
2020 #if wxUSE_RICHEDIT
2021     if (IsRich())
2022     {
2023         if (!m_privateContextMenu)
2024         {
2025             m_privateContextMenu = new wxMenu;
2026             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
2027             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
2028             m_privateContextMenu->AppendSeparator();
2029             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
2030             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
2031             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
2032             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
2033             m_privateContextMenu->AppendSeparator();
2034             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
2035         }
2036         PopupMenu(m_privateContextMenu, event.GetPosition());
2037         return;
2038     }
2039     else
2040 #endif
2041     event.Skip();
2042 }
2043
2044 void wxTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
2045 {
2046     // be sure the caret remains invisible if the user had hidden it
2047     if ( !m_isNativeCaretShown )
2048     {
2049         ::HideCaret(GetHwnd());
2050     }
2051 }
2052
2053 // the rest of the file only deals with the rich edit controls
2054 #if wxUSE_RICHEDIT
2055
2056 // ----------------------------------------------------------------------------
2057 // EN_LINK processing
2058 // ----------------------------------------------------------------------------
2059
2060 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
2061 {
2062     NMHDR *hdr = (NMHDR* )lParam;
2063     switch ( hdr->code )
2064     {
2065        case EN_MSGFILTER:
2066             {
2067                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
2068                 UINT msg = msgf->msg;
2069
2070                 // this is a bit crazy but richedit 1.0 sends us all mouse
2071                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
2072                 // generate the wxWin events for this message manually
2073                 //
2074                 // NB: in fact, this is still not totally correct as it does
2075                 //     send us WM_LBUTTONUP if the selection was cleared by the
2076                 //     last click -- so currently we get 2 events in this case,
2077                 //     but as I don't see any obvious way to check for this I
2078                 //     leave this code in place because it's still better than
2079                 //     not getting left up events at all
2080                 if ( msg == WM_LBUTTONUP )
2081                 {
2082                     WXUINT flags = msgf->wParam;
2083                     int x = GET_X_LPARAM(msgf->lParam),
2084                         y = GET_Y_LPARAM(msgf->lParam);
2085
2086                     HandleMouseEvent(msg, x, y, flags);
2087                 }
2088             }
2089
2090             // return TRUE to process the event (and FALSE to ignore it)
2091             return TRUE;
2092
2093         case EN_LINK:
2094             {
2095                 const ENLINK *enlink = (ENLINK *)hdr;
2096
2097                 switch ( enlink->msg )
2098                 {
2099                     case WM_SETCURSOR:
2100                         // ok, so it is hardcoded - do we really nee to
2101                         // customize it?
2102                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
2103                         *result = TRUE;
2104                         break;
2105
2106                     case WM_MOUSEMOVE:
2107                     case WM_LBUTTONDOWN:
2108                     case WM_LBUTTONUP:
2109                     case WM_LBUTTONDBLCLK:
2110                     case WM_RBUTTONDOWN:
2111                     case WM_RBUTTONUP:
2112                     case WM_RBUTTONDBLCLK:
2113                         // send a mouse event
2114                         {
2115                             static const wxEventType eventsMouse[] =
2116                             {
2117                                 wxEVT_MOTION,
2118                                 wxEVT_LEFT_DOWN,
2119                                 wxEVT_LEFT_UP,
2120                                 wxEVT_LEFT_DCLICK,
2121                                 wxEVT_RIGHT_DOWN,
2122                                 wxEVT_RIGHT_UP,
2123                                 wxEVT_RIGHT_DCLICK,
2124                             };
2125
2126                             // the event ids are consecutive
2127                             wxMouseEvent
2128                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
2129
2130                             InitMouseEvent(evtMouse,
2131                                            GET_X_LPARAM(enlink->lParam),
2132                                            GET_Y_LPARAM(enlink->lParam),
2133                                            enlink->wParam);
2134
2135                             wxTextUrlEvent event(m_windowId, evtMouse,
2136                                                  enlink->chrg.cpMin,
2137                                                  enlink->chrg.cpMax);
2138
2139                             InitCommandEvent(event);
2140
2141                             *result = ProcessCommand(event);
2142                         }
2143                         break;
2144                 }
2145             }
2146             return TRUE;
2147     }
2148
2149     // not processed, leave it to the base class
2150     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
2151 }
2152
2153 // ----------------------------------------------------------------------------
2154 // colour setting for the rich edit controls
2155 // ----------------------------------------------------------------------------
2156
2157 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
2158 {
2159     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
2160     {
2161         // colour didn't really change
2162         return FALSE;
2163     }
2164
2165     if ( IsRich() )
2166     {
2167         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
2168         // EM_SETBKGNDCOLOR additionally
2169         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
2170     }
2171
2172     return TRUE;
2173 }
2174
2175 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
2176 {
2177     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
2178     {
2179         // colour didn't really change
2180         return FALSE;
2181     }
2182
2183     if ( IsRich() )
2184     {
2185         // change the colour of everything
2186         CHARFORMAT cf;
2187         wxZeroMemory(cf);
2188         cf.cbSize = sizeof(cf);
2189         cf.dwMask = CFM_COLOR;
2190         cf.crTextColor = wxColourToRGB(colour);
2191         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
2192     }
2193
2194     return TRUE;
2195 }
2196
2197 // ----------------------------------------------------------------------------
2198 // styling support for rich edit controls
2199 // ----------------------------------------------------------------------------
2200
2201 #if wxUSE_RICHEDIT
2202
2203 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2204 {
2205     if ( !IsRich() )
2206     {
2207         // can't do it with normal text control
2208         return FALSE;
2209     }
2210
2211     // the richedit 1.0 doesn't handle setting background colour, so don't
2212     // even try to do anything if it's the only thing we want to change
2213     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
2214         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
2215         !style.HasTabs() )
2216     {
2217         // nothing to do: return TRUE if there was really nothing to do and
2218         // FALSE if we failed to set bg colour
2219         return !style.HasBackgroundColour();
2220     }
2221
2222     // order the range if needed
2223     if ( start > end )
2224     {
2225         long tmp = start;
2226         start = end;
2227         end = tmp;
2228     }
2229
2230     // we can only change the format of the selection, so select the range we
2231     // want and restore the old selection later
2232     long startOld, endOld;
2233     GetSelection(&startOld, &endOld);
2234
2235     // but do we really have to change the selection?
2236     bool changeSel = start != startOld || end != endOld;
2237
2238     if ( changeSel )
2239     {
2240         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
2241     }
2242
2243     // initialize CHARFORMAT struct
2244 #if wxUSE_RICHEDIT2
2245     CHARFORMAT2 cf;
2246 #else
2247     CHARFORMAT cf;
2248 #endif
2249
2250     wxZeroMemory(cf);
2251
2252     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2253     // CHARFORMAT in that case
2254 #if wxUSE_RICHEDIT2
2255     if ( m_verRichEdit == 1 )
2256     {
2257         // this is the only thing the control is going to grok
2258         cf.cbSize = sizeof(CHARFORMAT);
2259     }
2260     else
2261 #endif
2262     {
2263         // CHARFORMAT or CHARFORMAT2
2264         cf.cbSize = sizeof(cf);
2265     }
2266
2267     if ( style.HasFont() )
2268     {
2269         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
2270         //     but using it doesn't seem to hurt neither so leaving it for now
2271
2272         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
2273                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
2274
2275         // fill in data from LOGFONT but recalculate lfHeight because we need
2276         // the real height in twips and not the negative number which
2277         // wxFillLogFont() returns (this is correct in general and works with
2278         // the Windows font mapper, but not here)
2279         LOGFONT lf;
2280         wxFillLogFont(&lf, &style.GetFont());
2281         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
2282         cf.bCharSet = lf.lfCharSet;
2283         cf.bPitchAndFamily = lf.lfPitchAndFamily;
2284         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
2285
2286         // also deal with underline/italic/bold attributes: note that we must
2287         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
2288         // style to allow clearing it
2289         if ( lf.lfItalic )
2290         {
2291             cf.dwEffects |= CFE_ITALIC;
2292         }
2293
2294         if ( lf.lfWeight == FW_BOLD )
2295         {
2296             cf.dwEffects |= CFE_BOLD;
2297         }
2298
2299         if ( lf.lfUnderline )
2300         {
2301             cf.dwEffects |= CFE_UNDERLINE;
2302         }
2303
2304         // strikeout fonts are not supported by wxWindows
2305     }
2306
2307     if ( style.HasTextColour() )
2308     {
2309         cf.dwMask |= CFM_COLOR;
2310         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2311     }
2312
2313 #if wxUSE_RICHEDIT2
2314     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2315     {
2316         cf.dwMask |= CFM_BACKCOLOR;
2317         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2318     }
2319 #endif // wxUSE_RICHEDIT2
2320
2321     // do format the selection
2322     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
2323                             SCF_SELECTION, (LPARAM)&cf) != 0;
2324     if ( !ok )
2325     {
2326         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
2327     }
2328
2329     // now do the paragraph formatting
2330     PARAFORMAT2 pf;
2331     wxZeroMemory(pf);
2332     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2333     // PARAFORMAT in that case
2334 #if wxUSE_RICHEDIT2
2335     if ( m_verRichEdit == 1 )
2336     {
2337         // this is the only thing the control is going to grok
2338         pf.cbSize = sizeof(PARAFORMAT);
2339     }
2340     else
2341 #endif
2342     {
2343         // PARAFORMAT or PARAFORMAT2
2344         pf.cbSize = sizeof(pf);
2345     }
2346
2347     if (style.HasAlignment())
2348     {
2349         pf.dwMask |= PFM_ALIGNMENT;
2350         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2351             pf.wAlignment = PFA_RIGHT;
2352         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2353             pf.wAlignment = PFA_CENTER;
2354         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2355             pf.wAlignment = PFA_JUSTIFY;
2356         else
2357             pf.wAlignment = PFA_LEFT;
2358     }
2359
2360     if (style.HasLeftIndent())
2361     {
2362         pf.dwMask |= PFM_STARTINDENT;
2363
2364         // Convert from 1/10 mm to TWIPS
2365         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2366
2367         // TODO: do we need to specify dxOffset?
2368     }
2369
2370     if (style.HasRightIndent())
2371     {
2372         pf.dwMask |= PFM_RIGHTINDENT;
2373
2374         // Convert from 1/10 mm to TWIPS
2375         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2376     }
2377
2378     if (style.HasTabs())
2379     {
2380         pf.dwMask |= PFM_TABSTOPS;
2381
2382         const wxArrayInt& tabs = style.GetTabs();
2383
2384         pf.cTabCount = wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2385         size_t i;
2386         for (i = 0; i < (size_t) pf.cTabCount; i++)
2387         {
2388             // Convert from 1/10 mm to TWIPS
2389             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2390         }
2391     }
2392
2393     if (pf.dwMask != 0)
2394     {
2395         // do format the selection
2396         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2397             0, (LPARAM) &pf) != 0;
2398         if ( !ok )
2399         {
2400             wxLogDebug(_T("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2401         }
2402     }
2403
2404     if ( changeSel )
2405     {
2406         // restore the original selection
2407         DoSetSelection(startOld, endOld, FALSE);
2408     }
2409
2410     return ok;
2411 }
2412
2413 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2414 {
2415     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2416         return FALSE;
2417
2418     // we have to do this or the style wouldn't apply for the text typed by the
2419     // user
2420     long posLast = GetLastPosition();
2421     SetStyle(posLast, posLast, m_defaultStyle);
2422
2423     return TRUE;
2424 }
2425
2426 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2427 {
2428     if ( !IsRich() )
2429     {
2430         // can't do it with normal text control
2431         return FALSE;
2432     }
2433
2434     // initialize CHARFORMAT struct
2435 #if wxUSE_RICHEDIT2
2436     CHARFORMAT2 cf;
2437 #else
2438     CHARFORMAT cf;
2439 #endif
2440
2441     wxZeroMemory(cf);
2442
2443     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2444     // CHARFORMAT in that case
2445 #if wxUSE_RICHEDIT2
2446     if ( m_verRichEdit == 1 )
2447     {
2448         // this is the only thing the control is going to grok
2449         cf.cbSize = sizeof(CHARFORMAT);
2450     }
2451     else
2452 #endif
2453     {
2454         // CHARFORMAT or CHARFORMAT2
2455         cf.cbSize = sizeof(cf);
2456     }
2457     // we can only change the format of the selection, so select the range we
2458     // want and restore the old selection later
2459     long startOld, endOld;
2460     GetSelection(&startOld, &endOld);
2461
2462     // but do we really have to change the selection?
2463     bool changeSel = position != startOld || position != endOld;
2464
2465     if ( changeSel )
2466     {
2467         DoSetSelection(position, position, FALSE /* don't scroll caret into view */);
2468     }
2469
2470     // get the selection formatting
2471     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2472                             SCF_SELECTION, (LPARAM)&cf) ;
2473
2474     LOGFONT lf;
2475     lf.lfHeight = cf.yHeight;
2476     lf.lfWidth = 0;
2477     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2478     lf.lfClipPrecision = 0;
2479     lf.lfEscapement = 0;
2480     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2481     if (cf.dwEffects & CFE_ITALIC)
2482         lf.lfItalic = TRUE;
2483     lf.lfOrientation = 0;
2484     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2485     lf.lfQuality = 0;
2486     if (cf.dwEffects & CFE_STRIKEOUT)
2487         lf.lfStrikeOut = TRUE;
2488     if (cf.dwEffects & CFE_UNDERLINE)
2489         lf.lfUnderline = TRUE;
2490     if (cf.dwEffects & CFE_BOLD)
2491         lf.lfWeight = FW_BOLD;
2492
2493     wxFont font = wxCreateFontFromLogFont(& lf);
2494     if (font.Ok())
2495     {
2496         style.SetFont(font);
2497     }
2498     style.SetTextColour(wxColour(cf.crTextColor));
2499
2500 #if wxUSE_RICHEDIT2
2501     if ( m_verRichEdit != 1 )
2502     {
2503         // cf.dwMask |= CFM_BACKCOLOR;
2504         style.SetBackgroundColour(wxColour(cf.crBackColor));
2505     }
2506 #endif // wxUSE_RICHEDIT2
2507
2508     // now get the paragraph formatting
2509     PARAFORMAT2 pf;
2510     wxZeroMemory(pf);
2511     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2512     // PARAFORMAT in that case
2513 #if wxUSE_RICHEDIT2
2514     if ( m_verRichEdit == 1 )
2515     {
2516         // this is the only thing the control is going to grok
2517         pf.cbSize = sizeof(PARAFORMAT);
2518     }
2519     else
2520 #endif
2521     {
2522         // PARAFORMAT or PARAFORMAT2
2523         pf.cbSize = sizeof(pf);
2524     }
2525
2526     // do format the selection
2527     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2528
2529     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0) );
2530     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2531
2532     if (pf.wAlignment == PFA_CENTER)
2533         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2534     else if (pf.wAlignment == PFA_RIGHT)
2535         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2536     else if (pf.wAlignment == PFA_JUSTIFY)
2537         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2538     else
2539         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2540
2541     wxArrayInt tabStops;
2542     size_t i;
2543     for (i = 0; i < (size_t) pf.cTabCount; i++)
2544     {
2545         tabStops[i] = (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) ;
2546     }
2547
2548     if ( changeSel )
2549     {
2550         // restore the original selection
2551         DoSetSelection(startOld, endOld, FALSE);
2552     }
2553
2554     return TRUE;
2555 }
2556
2557 #endif
2558
2559 // ----------------------------------------------------------------------------
2560 // wxRichEditModule
2561 // ----------------------------------------------------------------------------
2562
2563 bool wxRichEditModule::OnInit()
2564 {
2565     // don't do anything - we will load it when needed
2566     return TRUE;
2567 }
2568
2569 void wxRichEditModule::OnExit()
2570 {
2571     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2572     {
2573         if ( ms_hRichEdit[i] )
2574         {
2575             ::FreeLibrary(ms_hRichEdit[i]);
2576             ms_hRichEdit[i] = NULL;
2577         }
2578     }
2579 }
2580
2581 /* static */
2582 bool wxRichEditModule::Load(int version)
2583 {
2584     // we don't support loading richedit 3.0 as I don't know how to distinguish
2585     // it from 2.0 anyhow
2586     wxCHECK_MSG( version == 1 || version == 2, FALSE,
2587                  _T("incorrect richedit control version requested") );
2588
2589     // make it the index in the array
2590     version--;
2591
2592     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2593     {
2594         // we had already tried to load it and failed
2595         return FALSE;
2596     }
2597
2598     if ( ms_hRichEdit[version] )
2599     {
2600         // we've already got this one
2601         return TRUE;
2602     }
2603
2604     wxString dllname = version ? _T("riched20") : _T("riched32");
2605     dllname += _T(".dll");
2606
2607     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2608
2609     if ( !ms_hRichEdit[version] )
2610     {
2611         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2612
2613         ms_hRichEdit[version] = (HINSTANCE)-1;
2614
2615         return FALSE;
2616     }
2617
2618     return TRUE;
2619 }
2620
2621 #endif // wxUSE_RICHEDIT
2622
2623 #endif // wxUSE_TEXTCTRL