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 #ifdef __WIN16__
 203     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 204 #endif
 205
 206     EVT_SET_FOCUS(wxTextCtrl::OnSetFocus)
 207 END_EVENT_TABLE()
 208
 209 // ============================================================================
 210 // implementation
 211 // ============================================================================
 212
 213 // ----------------------------------------------------------------------------
 214 // creation
 215 // ----------------------------------------------------------------------------
 216
 217 void wxTextCtrl::Init()
 218 {
 219 #if wxUSE_RICHEDIT
 220     m_verRichEdit = 0;
 221 #endif // wxUSE_RICHEDIT
 222
 223     m_privateContextMenu = NULL;
 224     m_suppressNextUpdate = FALSE;
 225     m_isNativeCaretShown = true;
 226 }
 227
 228 wxTextCtrl::~wxTextCtrl()
 229 {
 230     if (m_privateContextMenu)
 231     {
 232         delete m_privateContextMenu;
 233         m_privateContextMenu = NULL;
 234     }
 235 }
 236
 237 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 238                         const wxString& value,
 239                         const wxPoint& pos,
 240                         const wxSize& size,
 241                         long style,
 242                         const wxValidator& validator,
 243                         const wxString& name)
 244 {
 245     // base initialization
 246     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 247         return FALSE;
 248
 249     if ( parent )
 250         parent->AddChild(this);
 251
 252     // translate wxWin style flags to MSW ones
 253     WXDWORD msStyle = MSWGetCreateWindowFlags();
 254
 255     // do create the control - either an EDIT or RICHEDIT
 256     wxString windowClass = wxT("EDIT");
 257
 258 #if wxUSE_RICHEDIT
 259     if ( m_windowStyle & wxTE_AUTO_URL )
 260     {
 261         // automatic URL detection only works in RichEdit 2.0+
 262         m_windowStyle |= wxTE_RICH2;
 263     }
 264
 265     if ( m_windowStyle & wxTE_RICH2 )
 266     {
 267         // using richedit 2.0 implies using wxTE_RICH
 268         m_windowStyle |= wxTE_RICH;
 269     }
 270
 271     // we need to load the richedit DLL before creating the rich edit control
 272     if ( m_windowStyle & wxTE_RICH )
 273     {
 274         static bool s_errorGiven = FALSE;// MT-FIXME
 275
 276         // Which version do we need? Use 1.0 by default because it is much more
 277         // like the the standard EDIT or 2.0 if explicitly requested, but use
 278         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 279         //
 280         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 281         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 282         //       should use 3.0 if available as it is the best of both worlds -
 283         //       but as I can't test it right now I don't do it (VZ)
 284 #if wxUSE_UNICODE
 285         const int verRichEdit = 2;
 286 #else // !wxUSE_UNICODE
 287         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 288 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 289
 290         // only give the error msg once if the DLL can't be loaded
 291         if ( !s_errorGiven )
 292         {
 293             // try to load the RichEdit DLL (will do nothing if already done)
 294             if ( !wxRichEditModule::Load(verRichEdit) )
 295             {
 296 #if !wxUSE_UNICODE
 297                 // try another version?
 298                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 299
 300                 if ( !wxRichEditModule::Load(verRichEdit) )
 301 #endif // wxUSE_UNICODE
 302                 {
 303                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 304
 305                     s_errorGiven = TRUE;
 306                 }
 307             }
 308         }
 309
 310         // have we managed to load any richedit version?
 311         if ( !s_errorGiven )
 312         {
 313             m_verRichEdit = verRichEdit;
 314             if ( m_verRichEdit == 1 )
 315             {
 316                 windowClass = wxT("RICHEDIT");
 317             }
 318             else
 319             {
 320 #ifndef RICHEDIT_CLASS
 321                 wxString RICHEDIT_CLASS;
 322                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 323 #if wxUSE_UNICODE
 324                 RICHEDIT_CLASS += _T('W');
 325 #else // ANSI
 326                 RICHEDIT_CLASS += _T('A');
 327 #endif // Unicode/ANSI
 328 #endif // !RICHEDIT_CLASS
 329
 330                 windowClass = RICHEDIT_CLASS;
 331             }
 332         }
 333     }
 334 #endif // wxUSE_RICHEDIT
 335
 336     // we need to turn '\n's into "\r\n"s for the multiline controls
 337     wxString valueWin;
 338     if ( m_windowStyle & wxTE_MULTILINE )
 339     {
 340         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 341     }
 342     else // single line
 343     {
 344         valueWin = value;
 345     }
 346
 347     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 348         return FALSE;
 349
 350     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 351
 352 #if wxUSE_RICHEDIT
 353     if ( IsRich() )
 354     {
 355         // enable the events we're interested in: we want to get EN_CHANGE as
 356         // for the normal controls
 357         LPARAM mask = ENM_CHANGE;
 358
 359         if ( GetRichVersion() == 1 )
 360         {
 361             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 362             // explained in its handler
 363            mask |= ENM_MOUSEEVENTS;
 364         }
 365         else if ( m_windowStyle & wxTE_AUTO_URL )
 366         {
 367             mask |= ENM_LINK;
 368
 369             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 370         }
 371
 372         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 373     }
 374 #endif // wxUSE_RICHEDIT
 375
 376     return TRUE;
 377 }
 378
 379 // Make sure the window style (etc.) reflects the HWND style (roughly)
 380 void wxTextCtrl::AdoptAttributesFromHWND()
 381 {
 382     wxWindow::AdoptAttributesFromHWND();
 383
 384     HWND hWnd = GetHwnd();
 385     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 386
 387     // retrieve the style to see whether this is an edit or richedit ctrl
 388 #if wxUSE_RICHEDIT
 389     wxString classname = wxGetWindowClass(GetHWND());
 390
 391     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 392     {
 393         m_verRichEdit = 0;
 394     }
 395     else // rich edit?
 396     {
 397         wxChar c;
 398         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 399         {
 400             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 401
 402             m_verRichEdit = 0;
 403         }
 404     }
 405 #endif // wxUSE_RICHEDIT
 406
 407     if (style & ES_MULTILINE)
 408         m_windowStyle |= wxTE_MULTILINE;
 409     if (style & ES_PASSWORD)
 410         m_windowStyle |= wxTE_PASSWORD;
 411     if (style & ES_READONLY)
 412         m_windowStyle |= wxTE_READONLY;
 413     if (style & ES_WANTRETURN)
 414         m_windowStyle |= wxTE_PROCESS_ENTER;
 415     if (style & ES_CENTER)
 416         m_windowStyle |= wxTE_CENTRE;
 417     if (style & ES_RIGHT)
 418         m_windowStyle |= wxTE_RIGHT;
 419 }
 420
 421 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 422 {
 423     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 424
 425     // styles which we alaways add by default
 426     if ( style & wxTE_MULTILINE )
 427     {
 428         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 429                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 430
 431         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 432         if ( !(style & wxTE_NO_VSCROLL) )
 433         {
 434             // always adjust the vertical scrollbar automatically if we have it
 435             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 436
 437 #if wxUSE_RICHEDIT
 438             // we have to use this style for the rich edit controls because
 439             // without it the vertical scrollbar never appears at all in
 440             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 441             if ( style & wxTE_RICH2 )
 442             {
 443                 msStyle |= ES_DISABLENOSCROLL;
 444             }
 445 #endif // wxUSE_RICHEDIT
 446         }
 447
 448         style |= wxTE_PROCESS_ENTER;
 449     }
 450     else // !multiline
 451     {
 452         // there is really no reason to not have this style for single line
 453         // text controls
 454         msStyle |= ES_AUTOHSCROLL;
 455     }
 456
 457     // note that wxTE_DONTWRAP is the same as wxHSCROLL so if we have a horz
 458     // scrollbar, there is no wrapping -- which makes sense
 459     if ( style & wxTE_DONTWRAP )
 460     {
 461         // automatically scroll the control horizontally as necessary
 462         msStyle |= WS_HSCROLL;
 463     }
 464
 465     if ( style & wxTE_READONLY )
 466         msStyle |= ES_READONLY;
 467
 468     if ( style & wxTE_PASSWORD )
 469         msStyle |= ES_PASSWORD;
 470
 471     if ( style & wxTE_NOHIDESEL )
 472         msStyle |= ES_NOHIDESEL;
 473
 474     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 475     if ( style & wxTE_CENTRE )
 476         msStyle |= ES_CENTER;
 477     else if ( style & wxTE_RIGHT )
 478         msStyle |= ES_RIGHT;
 479     else
 480         msStyle |= ES_LEFT; // ES_LEFT is 0 as well but for consistency...
 481
 482     return msStyle;
 483 }
 484
 485 void wxTextCtrl::SetWindowStyleFlag(long style)
 486 {
 487 #if wxUSE_RICHEDIT
 488     // we have to deal with some styles separately because they can't be
 489     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 490     // using richedit-specific EM_SETOPTIONS
 491     if ( IsRich() &&
 492             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 493     {
 494         bool set = (style & wxTE_NOHIDESEL) != 0;
 495
 496         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 497                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 498     }
 499 #endif // wxUSE_RICHEDIT
 500
 501     wxControl::SetWindowStyleFlag(style);
 502 }
 503
 504 // ----------------------------------------------------------------------------
 505 // set/get the controls text
 506 // ----------------------------------------------------------------------------
 507
 508 wxString wxTextCtrl::GetValue() const
 509 {
 510     // range 0..-1 is special for GetRange() and means to retrieve all text
 511     return GetRange(0, -1);
 512 }
 513
 514 wxString wxTextCtrl::GetRange(long from, long to) const
 515 {
 516     wxString str;
 517
 518     if ( from >= to && to != -1 )
 519     {
 520         // nothing to retrieve
 521         return str;
 522     }
 523
 524 #if wxUSE_RICHEDIT
 525     if ( IsRich() )
 526     {
 527         int len = GetWindowTextLength(GetHwnd());
 528         if ( len > from )
 529         {
 530             if ( to == -1 )
 531                 to = len;
 532
 533 #if !wxUSE_UNICODE
 534             // we must use EM_STREAMOUT if we don't want to lose all characters
 535             // not representable in the current character set (EM_GETTEXTRANGE
 536             // simply replaces them with question marks...)
 537             if ( GetRichVersion() > 1 )
 538             {
 539                 // we must have some encoding, otherwise any 8bit chars in the
 540                 // control are simply *lost* (replaced by '?')
 541                 wxFontEncoding encoding = wxFONTENCODING_SYSTEM;
 542
 543                 wxFont font = m_defaultStyle.GetFont();
 544                 if ( !font.Ok() )
 545                     font = GetFont();
 546
 547                 if ( font.Ok() )
 548                 {
 549                    encoding = font.GetEncoding();
 550                 }
 551
 552                 if ( encoding == wxFONTENCODING_SYSTEM )
 553                 {
 554                     encoding = wxLocale::GetSystemEncoding();
 555                 }
 556
 557                 if ( encoding == wxFONTENCODING_SYSTEM )
 558                 {
 559                     encoding = wxFONTENCODING_ISO8859_1;
 560                 }
 561
 562                 str = StreamOut(encoding);
 563
 564                 if ( !str.empty() )
 565                 {
 566                     // we have to manually extract the required part, luckily
 567                     // this is easy in this case as EOL characters in str are
 568                     // just LFs because we remove CRs in wxRichEditStreamOut
 569                     str = str.Mid(from, to - from);
 570                 }
 571             }
 572
 573             // StreamOut() wasn't used or failed, try to do it in normal way
 574             if ( str.empty() )
 575 #endif // !wxUSE_UNICODE
 576             {
 577                 // alloc one extra WORD as needed by the control
 578                 wxStringBuffer tmp(str, ++len);
 579                 wxChar *p = tmp;
 580
 581                 TEXTRANGE textRange;
 582                 textRange.chrg.cpMin = from;
 583                 textRange.chrg.cpMax = to;
 584                 textRange.lpstrText = p;
 585
 586                 (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE,
 587                                   0, (LPARAM)&textRange);
 588
 589                 if ( m_verRichEdit > 1 )
 590                 {
 591                     // RichEdit 2.0 uses just CR ('\r') for the
 592                     // newlines which is neither Unix nor Windows
 593                     // style - convert it to something reasonable
 594                     for ( ; *p; p++ )
 595                     {
 596                         if ( *p == _T('\r') )
 597                             *p = _T('\n');
 598                     }
 599                 }
 600             }
 601
 602             if ( m_verRichEdit == 1 )
 603             {
 604                 // convert to the canonical form - see comment below
 605                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 606             }
 607         }
 608         //else: no text at all, leave the string empty
 609     }
 610     else
 611 #endif // wxUSE_RICHEDIT
 612     {
 613         // retrieve all text
 614         str = wxGetWindowText(GetHWND());
 615
 616         // need only a range?
 617         if ( from < to )
 618         {
 619             str = str.Mid(from, to - from);
 620         }
 621
 622         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 623         // canonical one (same one as above) for consistency with the other kinds
 624         // of controls and, more importantly, with the other ports
 625         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 626     }
 627
 628     return str;
 629 }
 630
 631 void wxTextCtrl::SetValue(const wxString& value)
 632 {
 633     // if the text is long enough, it's faster to just set it instead of first
 634     // comparing it with the old one (chances are that it will be different
 635     // anyhow, this comparison is there to avoid flicker for small single-line
 636     // edit controls mostly)
 637     if ( (value.length() > 0x400) || (value != GetValue()) )
 638     {
 639         DoWriteText(value, FALSE /* not selection only */);
 640
 641         // for compatibility, don't move the cursor when doing SetValue()
 642         SetInsertionPoint(0);
 643     }
 644     else // same text
 645     {
 646         // still send an event for consistency
 647         SendUpdateEvent();
 648     }
 649
 650     // we should reset the modified flag even if the value didn't really change
 651
 652     // mark the control as being not dirty - we changed its text, not the
 653     // user
 654     DiscardEdits();
 655 }
 656
 657 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 658
 659 // TODO: using memcpy() would improve performance a lot for big amounts of text
 660
 661 DWORD CALLBACK
 662 wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 663 {
 664     *pcb = 0;
 665
 666     const wchar_t ** const ppws = (const wchar_t **)dwCookie;
 667
 668     wchar_t *wbuf = (wchar_t *)buf;
 669     const wchar_t *wpc = *ppws;
 670     while ( cb && *wpc )
 671     {
 672         *wbuf++ = *wpc++;
 673
 674         cb -= sizeof(wchar_t);
 675         (*pcb) += sizeof(wchar_t);
 676     }
 677
 678     *ppws = wpc;
 679
 680     return 0;
 681 }
 682
 683 // helper struct used to pass parameters from wxTextCtrl to wxRichEditStreamOut
 684 struct wxStreamOutData
 685 {
 686     wchar_t *wpc;
 687     size_t len;
 688 };
 689
 690 DWORD CALLBACK
 691 wxRichEditStreamOut(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 692 {
 693     *pcb = 0;
 694
 695     wxStreamOutData *data = (wxStreamOutData *)dwCookie;
 696
 697     const wchar_t *wbuf = (const wchar_t *)buf;
 698     wchar_t *wpc = data->wpc;
 699     while ( cb )
 700     {
 701         wchar_t wch = *wbuf++;
 702
 703         // turn "\r\n" into "\n" on the fly
 704         if ( wch != L'\r' )
 705             *wpc++ = wch;
 706         else
 707             data->len--;
 708
 709         cb -= sizeof(wchar_t);
 710         (*pcb) += sizeof(wchar_t);
 711     }
 712
 713     data->wpc = wpc;
 714
 715     return 0;
 716 }
 717
 718
 719 #if wxUSE_UNICODE_MSLU
 720     #define UNUSED_IF_MSLU(param)
 721 #else
 722     #define UNUSED_IF_MSLU(param) param
 723 #endif
 724
 725 bool
 726 wxTextCtrl::StreamIn(const wxString& value,
 727                      wxFontEncoding UNUSED_IF_MSLU(encoding),
 728                      bool selectionOnly)
 729 {
 730 #if wxUSE_UNICODE_MSLU
 731     const wchar_t *wpc = value.c_str();
 732 #else // !wxUSE_UNICODE_MSLU
 733     wxCSConv conv(encoding);
 734
 735     const size_t len = conv.MB2WC(NULL, value, value.length());
 736
 737 #if wxUSE_WCHAR_T
 738     wxWCharBuffer wchBuf(len);
 739     wchar_t *wpc = wchBuf.data();
 740 #else
 741     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 742     wchar_t *wpc = wchBuf;
 743 #endif
 744
 745     conv.MB2WC(wpc, value, value.length());
 746 #endif // wxUSE_UNICODE_MSLU
 747
 748     // finally, stream it in the control
 749     EDITSTREAM eds;
 750     wxZeroMemory(eds);
 751     eds.dwCookie = (DWORD)&wpc;
 752     // the cast below is needed for broken (very) old mingw32 headers
 753     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 754
 755     // we're going to receive 2 EN_CHANGE notifications if we got any selection
 756     // (same problem as in DoWriteText())
 757     if ( selectionOnly && HasSelection() )
 758     {
 759         // so suppress one of them
 760         m_suppressNextUpdate = TRUE;
 761     }
 762
 763     ::SendMessage(GetHwnd(), EM_STREAMIN,
 764                   SF_TEXT |
 765                   SF_UNICODE |
 766                   (selectionOnly ? SFF_SELECTION : 0),
 767                   (LPARAM)&eds);
 768
 769     if ( eds.dwError )
 770     {
 771         wxLogLastError(_T("EM_STREAMIN"));
 772     }
 773
 774 #if !wxUSE_WCHAR_T
 775     free(wchBuf);
 776 #endif // !wxUSE_WCHAR_T
 777
 778     return TRUE;
 779 }
 780
 781 #if !wxUSE_UNICODE_MSLU
 782
 783 wxString
 784 wxTextCtrl::StreamOut(wxFontEncoding encoding, bool selectionOnly) const
 785 {
 786     wxString out;
 787
 788     const int len = GetWindowTextLength(GetHwnd());
 789
 790 #if wxUSE_WCHAR_T
 791     wxWCharBuffer wchBuf(len);
 792     wchar_t *wpc = wchBuf.data();
 793 #else
 794     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 795     wchar_t *wpc = wchBuf;
 796 #endif
 797
 798     wxStreamOutData data;
 799     data.wpc = wpc;
 800     data.len = len;
 801
 802     EDITSTREAM eds;
 803     wxZeroMemory(eds);
 804     eds.dwCookie = (DWORD)&data;
 805     eds.pfnCallback = wxRichEditStreamOut;
 806
 807     ::SendMessage
 808       (
 809         GetHwnd(),
 810         EM_STREAMOUT,
 811         SF_TEXT | SF_UNICODE | (selectionOnly ? SFF_SELECTION : 0),
 812         (LPARAM)&eds
 813       );
 814
 815     if ( eds.dwError )
 816     {
 817         wxLogLastError(_T("EM_STREAMOUT"));
 818     }
 819     else // streamed out ok
 820     {
 821         // NUL-terminate the string because its length could have been
 822         // decreased by wxRichEditStreamOut
 823         *(wchBuf.data() + data.len) = L'\0';
 824
 825         // now convert to the given encoding (this is a possibly lossful
 826         // conversion but what else can we do)
 827         wxCSConv conv(encoding);
 828         size_t lenNeeded = conv.WC2MB(NULL, wchBuf, 0);
 829         if ( lenNeeded++ )
 830         {
 831             conv.WC2MB(wxStringBuffer(out, lenNeeded), wchBuf, lenNeeded);
 832         }
 833     }
 834
 835 #if !wxUSE_WCHAR_T
 836     free(wchBuf);
 837 #endif // !wxUSE_WCHAR_T
 838
 839     return out;
 840 }
 841
 842 #endif // !wxUSE_UNICODE_MSLU
 843
 844 #endif // wxUSE_RICHEDIT
 845
 846 void wxTextCtrl::WriteText(const wxString& value)
 847 {
 848     DoWriteText(value);
 849 }
 850
 851 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 852 {
 853     wxString valueDos;
 854     if ( m_windowStyle & wxTE_MULTILINE )
 855         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 856     else
 857         valueDos = value;
 858
 859 #if wxUSE_RICHEDIT
 860     // there are several complications with the rich edit controls here
 861     bool done = FALSE;
 862     if ( IsRich() )
 863     {
 864         // first, ensure that the new text will be in the default style
 865         if ( !m_defaultStyle.IsDefault() )
 866         {
 867             long start, end;
 868             GetSelection(&start, &end);
 869             SetStyle(start, end, m_defaultStyle);
 870         }
 871
 872 #if wxUSE_UNICODE_MSLU
 873         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 874         // but EM_STREAMIN works
 875         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 876         {
 877            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 878         }
 879 #endif // wxUSE_UNICODE_MSLU
 880
 881 #if !wxUSE_UNICODE
 882         // next check if the text we're inserting must be shown in a non
 883         // default charset -- this only works for RichEdit > 1.0
 884         if ( GetRichVersion() > 1 )
 885         {
 886             wxFont font = m_defaultStyle.GetFont();
 887             if ( !font.Ok() )
 888                 font = GetFont();
 889
 890             if ( font.Ok() )
 891             {
 892                wxFontEncoding encoding = font.GetEncoding();
 893                if ( encoding != wxFONTENCODING_SYSTEM )
 894                {
 895                    // we have to use EM_STREAMIN to force richedit control 2.0+
 896                    // to show any text in the non default charset -- otherwise
 897                    // it thinks it knows better than we do and always shows it
 898                    // in the default one
 899                    done = StreamIn(valueDos, encoding, selectionOnly);
 900                }
 901             }
 902         }
 903 #endif // !wxUSE_UNICODE
 904     }
 905
 906     if ( !done )
 907 #endif // wxUSE_RICHEDIT
 908     {
 909         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
 910         // call below which is confusing for the client code and so should be
 911         // avoided
 912         //
 913         // these cases are: (a) plain EDIT controls if EM_REPLACESEL is used
 914         // and there is a non empty selection currently and (b) rich text
 915         // controls in any case
 916         if (
 917 #if wxUSE_RICHEDIT
 918             IsRich() ||
 919 #endif // wxUSE_RICHEDIT
 920             (selectionOnly && HasSelection()) )
 921         {
 922             m_suppressNextUpdate = TRUE;
 923         }
 924
 925         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 926                       0, (LPARAM)valueDos.c_str());
 927
 928         // OTOH, non rich text controls don't generate any events at all when
 929         // we use WM_SETTEXT -- have to emulate them here
 930         if ( !selectionOnly
 931 #if wxUSE_RICHEDIT
 932                 && !IsRich()
 933 #endif // wxUSE_RICHEDIT
 934            )
 935         {
 936             // Windows already sends an update event for single-line
 937             // controls.
 938             if ( m_windowStyle & wxTE_MULTILINE )
 939                 SendUpdateEvent();
 940         }
 941     }
 942
 943     AdjustSpaceLimit();
 944 }
 945
 946 void wxTextCtrl::AppendText(const wxString& text)
 947 {
 948     SetInsertionPointEnd();
 949
 950     WriteText(text);
 951
 952 #if wxUSE_RICHEDIT
 953     if ( IsMultiLine() && GetRichVersion() > 1 )
 954     {
 955         // setting the caret to the end and showing it simply doesn't work for
 956         // RichEdit 2.0 -- force it to still do what we want
 957         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
 958     }
 959 #endif // wxUSE_RICHEDIT
 960 }
 961
 962 void wxTextCtrl::Clear()
 963 {
 964     ::SetWindowText(GetHwnd(), wxEmptyString);
 965
 966 #if wxUSE_RICHEDIT
 967     if ( !IsRich() )
 968 #endif // wxUSE_RICHEDIT
 969     {
 970         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 971         // but the normal ones don't -- make Clear() behaviour consistent by
 972         // always sending this event
 973
 974         // Windows already sends an update event for single-line
 975         // controls.
 976         if ( m_windowStyle & wxTE_MULTILINE )
 977             SendUpdateEvent();
 978     }
 979 }
 980
 981 #ifdef __WIN32__
 982
 983 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 984 {
 985     SetFocus();
 986
 987     size_t lenOld = GetValue().length();
 988
 989     wxUint32 code = event.GetRawKeyCode();
 990     ::keybd_event(code, 0, 0 /* key press */, 0);
 991     ::keybd_event(code, 0, KEYEVENTF_KEYUP, 0);
 992
 993     // assume that any alphanumeric key changes the total number of characters
 994     // in the control - this should work in 99% of cases
 995     return GetValue().length() != lenOld;
 996 }
 997
 998 #endif // __WIN32__
 999
1000 // ----------------------------------------------------------------------------
1001 // Clipboard operations
1002 // ----------------------------------------------------------------------------
1003
1004 void wxTextCtrl::Copy()
1005 {
1006     if (CanCopy())
1007     {
1008         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
1009     }
1010 }
1011
1012 void wxTextCtrl::Cut()
1013 {
1014     if (CanCut())
1015     {
1016         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
1017     }
1018 }
1019
1020 void wxTextCtrl::Paste()
1021 {
1022     if (CanPaste())
1023     {
1024         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
1025     }
1026 }
1027
1028 bool wxTextCtrl::HasSelection() const
1029 {
1030     long from, to;
1031     GetSelection(&from, &to);
1032     return from != to;
1033 }
1034
1035 bool wxTextCtrl::CanCopy() const
1036 {
1037     // Can copy if there's a selection
1038     return HasSelection();
1039 }
1040
1041 bool wxTextCtrl::CanCut() const
1042 {
1043     return CanCopy() && IsEditable();
1044 }
1045
1046 bool wxTextCtrl::CanPaste() const
1047 {
1048     if ( !IsEditable() )
1049         return FALSE;
1050
1051 #if wxUSE_RICHEDIT
1052     if ( IsRich() )
1053     {
1054         UINT cf = 0; // 0 == any format
1055
1056         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
1057     }
1058 #endif // wxUSE_RICHEDIT
1059
1060     // Standard edit control: check for straight text on clipboard
1061     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
1062         return FALSE;
1063
1064     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
1065     ::CloseClipboard();
1066
1067     return isTextAvailable;
1068 }
1069
1070 // ----------------------------------------------------------------------------
1071 // Accessors
1072 // ----------------------------------------------------------------------------
1073
1074 void wxTextCtrl::SetEditable(bool editable)
1075 {
1076     HWND hWnd = GetHwnd();
1077     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
1078 }
1079
1080 void wxTextCtrl::SetInsertionPoint(long pos)
1081 {
1082     DoSetSelection(pos, pos);
1083 }
1084
1085 void wxTextCtrl::SetInsertionPointEnd()
1086 {
1087     // we must not do anything if the caret is already there because calling
1088     // SetInsertionPoint() thaws the controls if Freeze() had been called even
1089     // if it doesn't actually move the caret anywhere and so the simple fact of
1090     // doing it results in horrible flicker when appending big amounts of text
1091     // to the control in a few chunks (see DoAddText() test in the text sample)
1092     if ( GetInsertionPoint() == GetLastPosition() )
1093         return;
1094
1095     long pos;
1096
1097 #if wxUSE_RICHEDIT
1098     if ( m_verRichEdit == 1 )
1099     {
1100         // we don't have to waste time calling GetLastPosition() in this case
1101         pos = -1;
1102     }
1103     else // !RichEdit 1.0
1104 #endif // wxUSE_RICHEDIT
1105     {
1106         pos = GetLastPosition();
1107     }
1108
1109     SetInsertionPoint(pos);
1110 }
1111
1112 long wxTextCtrl::GetInsertionPoint() const
1113 {
1114 #if wxUSE_RICHEDIT
1115     if ( IsRich() )
1116     {
1117         CHARRANGE range;
1118         range.cpMin = 0;
1119         range.cpMax = 0;
1120         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
1121         return range.cpMin;
1122     }
1123 #endif // wxUSE_RICHEDIT
1124
1125     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
1126     return Pos & 0xFFFF;
1127 }
1128
1129 long wxTextCtrl::GetLastPosition() const
1130 {
1131     int numLines = GetNumberOfLines();
1132     long posStartLastLine = XYToPosition(0, numLines - 1);
1133
1134     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
1135
1136     return posStartLastLine + lenLastLine;
1137 }
1138
1139 // If the return values from and to are the same, there is no
1140 // selection.
1141 void wxTextCtrl::GetSelection(long* from, long* to) const
1142 {
1143 #if wxUSE_RICHEDIT
1144     if ( IsRich() )
1145     {
1146         CHARRANGE charRange;
1147         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
1148
1149         *from = charRange.cpMin;
1150         *to = charRange.cpMax;
1151     }
1152     else
1153 #endif // !wxUSE_RICHEDIT
1154     {
1155         DWORD dwStart, dwEnd;
1156         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
1157
1158         *from = dwStart;
1159         *to = dwEnd;
1160     }
1161 }
1162
1163 bool wxTextCtrl::IsEditable() const
1164 {
1165     // strangely enough, we may be called before the control is created: our
1166     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
1167     // us
1168     if ( !m_hWnd )
1169         return TRUE;
1170
1171     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1172
1173     return (style & ES_READONLY) == 0;
1174 }
1175
1176 // ----------------------------------------------------------------------------
1177 // selection
1178 // ----------------------------------------------------------------------------
1179
1180 void wxTextCtrl::SetSelection(long from, long to)
1181 {
1182     // if from and to are both -1, it means (in wxWindows) that all text should
1183     // be selected - translate into Windows convention
1184     if ( (from == -1) && (to == -1) )
1185     {
1186         from = 0;
1187         to = -1;
1188     }
1189
1190     DoSetSelection(from, to);
1191 }
1192
1193 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
1194 {
1195     HWND hWnd = GetHwnd();
1196
1197 #ifdef __WIN32__
1198 #if wxUSE_RICHEDIT
1199     if ( IsRich() )
1200     {
1201         CHARRANGE range;
1202         range.cpMin = from;
1203         range.cpMax = to;
1204         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
1205     }
1206     else
1207 #endif // wxUSE_RICHEDIT
1208     {
1209         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
1210     }
1211
1212     if ( scrollCaret )
1213     {
1214 #if wxUSE_RICHEDIT
1215         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1216         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1217         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1218         // option is set (but it does work ok in richedit 1.0 mode...)
1219         //
1220         // so to make it work we either need to give focus to it here which
1221         // will probably create many problems (dummy focus events; window
1222         // containing the text control being brought to foreground
1223         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1224         // create other problems too -- and in fact it does because if we turn
1225         // on/off this style while appending the text to the control, the
1226         // vertical scrollbar never appears in it even if we append tons of
1227         // text and to work around this the only solution I found was to use
1228         // ES_DISABLENOSCROLL
1229         //
1230         // this is very ugly but I don't see any other way to make this work
1231         if ( GetRichVersion() > 1 )
1232         {
1233             if ( !HasFlag(wxTE_NOHIDESEL) )
1234             {
1235                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1236                               ECOOP_OR, ECO_NOHIDESEL);
1237             }
1238             //else: everything is already ok
1239         }
1240 #endif // wxUSE_RICHEDIT
1241
1242         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1243
1244 #if wxUSE_RICHEDIT
1245         // restore ECO_NOHIDESEL if we changed it
1246         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1247         {
1248             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1249                           ECOOP_AND, ~ECO_NOHIDESEL);
1250         }
1251 #endif // wxUSE_RICHEDIT
1252     }
1253 #else // Win16
1254     // WPARAM is 0: selection is scrolled into view
1255     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
1256 #endif // Win32/16
1257 }
1258
1259 // ----------------------------------------------------------------------------
1260 // Working with files
1261 // ----------------------------------------------------------------------------
1262
1263 bool wxTextCtrl::LoadFile(const wxString& file)
1264 {
1265     if ( wxTextCtrlBase::LoadFile(file) )
1266     {
1267         // update the size limit if needed
1268         AdjustSpaceLimit();
1269
1270         return TRUE;
1271     }
1272
1273     return FALSE;
1274 }
1275
1276 // ----------------------------------------------------------------------------
1277 // Editing
1278 // ----------------------------------------------------------------------------
1279
1280 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1281 {
1282     // Set selection and remove it
1283     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
1284
1285     DoWriteText(value, TRUE /* selection only */);
1286 }
1287
1288 void wxTextCtrl::Remove(long from, long to)
1289 {
1290     Replace(from, to, wxEmptyString);
1291 }
1292
1293 bool wxTextCtrl::IsModified() const
1294 {
1295     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1296 }
1297
1298 void wxTextCtrl::MarkDirty()
1299 {
1300     SendMessage(GetHwnd(), EM_SETMODIFY, TRUE, 0L);
1301 }
1302
1303 void wxTextCtrl::DiscardEdits()
1304 {
1305     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1306 }
1307
1308 int wxTextCtrl::GetNumberOfLines() const
1309 {
1310     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1311 }
1312
1313 // ----------------------------------------------------------------------------
1314 // Positions <-> coords
1315 // ----------------------------------------------------------------------------
1316
1317 long wxTextCtrl::XYToPosition(long x, long y) const
1318 {
1319     // This gets the char index for the _beginning_ of this line
1320     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1321
1322     return charIndex + x;
1323 }
1324
1325 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1326 {
1327     HWND hWnd = GetHwnd();
1328
1329     // This gets the line number containing the character
1330     long lineNo;
1331 #if wxUSE_RICHEDIT
1332     if ( IsRich() )
1333     {
1334         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1335     }
1336     else
1337 #endif // wxUSE_RICHEDIT
1338     {
1339         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1340     }
1341
1342     if ( lineNo == -1 )
1343     {
1344         // no such line
1345         return FALSE;
1346     }
1347
1348     // This gets the char index for the _beginning_ of this line
1349     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1350     if ( charIndex == -1 )
1351     {
1352         return FALSE;
1353     }
1354
1355     // The X position must therefore be the different between pos and charIndex
1356     if ( x )
1357         *x = pos - charIndex;
1358     if ( y )
1359         *y = lineNo;
1360
1361     return TRUE;
1362 }
1363
1364 wxTextCtrlHitTestResult
1365 wxTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *col, wxTextCoord *row) const
1366 {
1367     // first get the position from Windows
1368     LPARAM lParam;
1369
1370 #if wxUSE_RICHEDIT
1371     POINTL ptl;
1372     if ( IsRich() )
1373     {
1374         // for rich edit controls the position is passed iva the struct fields
1375         ptl.x = pt.x;
1376         ptl.y = pt.y;
1377         lParam = (LPARAM)&ptl;
1378     }
1379     else
1380 #endif // wxUSE_RICHEDIT
1381     {
1382         // for the plain ones, we are limited to 16 bit positions which are
1383         // combined in a single 32 bit value
1384         lParam = MAKELPARAM(pt.x, pt.y);
1385     }
1386
1387     LRESULT pos = SendMessage(GetHwnd(), EM_CHARFROMPOS, 0, lParam);
1388
1389     if ( pos == -1 )
1390     {
1391         // this seems to indicate an error...
1392         return wxTE_HT_UNKNOWN;
1393     }
1394
1395 #if wxUSE_RICHEDIT
1396     if ( !IsRich() )
1397 #endif // wxUSE_RICHEDIT
1398     {
1399         // for plain EDIT controls the higher word contains something else
1400         pos = LOWORD(pos);
1401     }
1402
1403
1404     // next determine where it is relatively to our point: EM_CHARFROMPOS
1405     // always returns the closest character but we need to be more precise, so
1406     // double check that we really are where it pretends
1407     POINTL ptReal;
1408
1409 #if wxUSE_RICHEDIT
1410     // FIXME: we need to distinguish between richedit 2 and 3 here somehow but
1411     //        we don't know how to do it
1412     if ( IsRich() )
1413     {
1414         SendMessage(GetHwnd(), EM_POSFROMCHAR, (WPARAM)&ptReal, pos);
1415     }
1416     else
1417 #endif // wxUSE_RICHEDIT
1418     {
1419         LRESULT lRc = SendMessage(GetHwnd(), EM_POSFROMCHAR, pos, 0);
1420
1421         if ( lRc == -1 )
1422         {
1423             // this is apparently returned when pos corresponds to the last
1424             // position
1425             ptReal.x =
1426             ptReal.y = 0;
1427         }
1428         else
1429         {
1430             ptReal.x = LOWORD(lRc);
1431             ptReal.y = HIWORD(lRc);
1432         }
1433     }
1434
1435     wxTextCtrlHitTestResult rc;
1436
1437     if ( pt.y > ptReal.y + GetCharHeight() )
1438         rc = wxTE_HT_BELOW;
1439     else if ( pt.x > ptReal.x + GetCharWidth() )
1440         rc = wxTE_HT_BEYOND;
1441     else
1442         rc = wxTE_HT_ON_TEXT;
1443
1444     // finally translate to column/row
1445     if ( !PositionToXY(pos, col, row) )
1446     {
1447         wxFAIL_MSG( _T("PositionToXY() not expected to fail in HitTest()") );
1448     }
1449
1450     return rc;
1451 }
1452
1453 // ----------------------------------------------------------------------------
1454 //
1455 // ----------------------------------------------------------------------------
1456
1457 void wxTextCtrl::ShowPosition(long pos)
1458 {
1459     HWND hWnd = GetHwnd();
1460
1461     // To scroll to a position, we pass the number of lines and characters
1462     // to scroll *by*. This means that we need to:
1463     // (1) Find the line position of the current line.
1464     // (2) Find the line position of pos.
1465     // (3) Scroll by (pos - current).
1466     // For now, ignore the horizontal scrolling.
1467
1468     // Is this where scrolling is relative to - the line containing the caret?
1469     // Or is the first visible line??? Try first visible line.
1470 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1471
1472     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1473
1474     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1475
1476     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1477
1478     if (linesToScroll != 0)
1479       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1480 }
1481
1482 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1483 {
1484     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1485 }
1486
1487 int wxTextCtrl::GetLineLength(long lineNo) const
1488 {
1489     long pos = XYToPosition(0, lineNo);
1490
1491     return GetLengthOfLineContainingPos(pos);
1492 }
1493
1494 wxString wxTextCtrl::GetLineText(long lineNo) const
1495 {
1496     size_t len = (size_t)GetLineLength(lineNo) + 1;
1497
1498     // there must be at least enough place for the length WORD in the
1499     // buffer
1500     len += sizeof(WORD);
1501
1502     wxString str;
1503     {
1504         wxStringBufferLength tmp(str, len);
1505         wxChar *buf = tmp;
1506
1507         *(WORD *)buf = (WORD)len;
1508         len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1509
1510 #if wxUSE_RICHEDIT
1511         if ( IsRich() )
1512         {
1513             // remove the '\r' returned by the rich edit control, the user code
1514             // should never see it
1515             if ( buf[len - 2] == _T('\r') && buf[len - 1] == _T('\n') )
1516             {
1517                 buf[len - 2] = _T('\n');
1518                 len--;
1519             }
1520         }
1521 #endif // wxUSE_RICHEDIT
1522
1523         // remove the '\n' at the end, if any (this is how this function is
1524         // supposed to work according to the docs)
1525         if ( buf[len - 1] == _T('\n') )
1526         {
1527             len--;
1528         }
1529
1530         buf[len] = 0;
1531         tmp.SetLength(len);
1532     }
1533
1534     return str;
1535 }
1536
1537 void wxTextCtrl::SetMaxLength(unsigned long len)
1538 {
1539     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1540 }
1541
1542 // ----------------------------------------------------------------------------
1543 // Undo/redo
1544 // ----------------------------------------------------------------------------
1545
1546 void wxTextCtrl::Undo()
1547 {
1548     if (CanUndo())
1549     {
1550         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1551     }
1552 }
1553
1554 void wxTextCtrl::Redo()
1555 {
1556     if (CanRedo())
1557     {
1558         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1559         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1560     }
1561 }
1562
1563 bool wxTextCtrl::CanUndo() const
1564 {
1565     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1566 }
1567
1568 bool wxTextCtrl::CanRedo() const
1569 {
1570     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1571 }
1572
1573 // ----------------------------------------------------------------------------
1574 // caret handling (Windows only)
1575 // ----------------------------------------------------------------------------
1576
1577 bool wxTextCtrl::ShowNativeCaret(bool show)
1578 {
1579     if ( show != m_isNativeCaretShown )
1580     {
1581         if ( !(show ? ::ShowCaret(GetHwnd()) : ::HideCaret(GetHwnd())) )
1582         {
1583             // not an error, may simply indicate that it's not shown/hidden
1584             // yet (i.e. it had been hidden/showh 2 times before)
1585             return false;
1586         }
1587
1588         m_isNativeCaretShown = show;
1589     }
1590
1591     return true;
1592 }
1593
1594 // ----------------------------------------------------------------------------
1595 // implemenation details
1596 // ----------------------------------------------------------------------------
1597
1598 void wxTextCtrl::Command(wxCommandEvent & event)
1599 {
1600     SetValue(event.GetString());
1601     ProcessCommand (event);
1602 }
1603
1604 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1605 {
1606     // By default, load the first file into the text window.
1607     if (event.GetNumberOfFiles() > 0)
1608     {
1609         LoadFile(event.GetFiles()[0]);
1610     }
1611 }
1612
1613 // ----------------------------------------------------------------------------
1614 // kbd input processing
1615 // ----------------------------------------------------------------------------
1616
1617 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1618 {
1619     MSG *msg = (MSG *)pMsg;
1620
1621     // check for our special keys here: if we don't do it and the parent frame
1622     // uses them as accelerators, they wouldn't work at all, so we disable
1623     // usual preprocessing for them
1624     if ( msg->message == WM_KEYDOWN )
1625     {
1626         WORD vkey = (WORD) msg->wParam;
1627         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1628         {
1629             if ( vkey == VK_BACK )
1630                 return FALSE;
1631         }
1632         else // no Alt
1633         {
1634             // we want to process some Ctrl-foo and Shift-bar but no key
1635             // combinations without either Ctrl or Shift nor with both of them
1636             // pressed
1637             const int ctrl = wxIsCtrlDown(),
1638                       shift = wxIsShiftDown();
1639             switch ( ctrl + shift )
1640             {
1641                 default:
1642                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1643                     // fall through
1644
1645                 case 0:
1646                 case 2:
1647                     break;
1648
1649                 case 1:
1650                     // either Ctrl or Shift pressed
1651                     if ( ctrl )
1652                     {
1653                         switch ( vkey )
1654                         {
1655                             case 'C':
1656                             case 'V':
1657                             case 'X':
1658                             case VK_INSERT:
1659                             case VK_DELETE:
1660                             case VK_HOME:
1661                             case VK_END:
1662                                 return FALSE;
1663                         }
1664                     }
1665                     else // Shift is pressed
1666                     {
1667                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1668                             return FALSE;
1669                     }
1670             }
1671         }
1672     }
1673
1674     return wxControl::MSWShouldPreProcessMessage(pMsg);
1675 }
1676
1677 void wxTextCtrl::OnChar(wxKeyEvent& event)
1678 {
1679     switch ( event.GetKeyCode() )
1680     {
1681         case WXK_RETURN:
1682             if ( !(m_windowStyle & wxTE_MULTILINE) )
1683             {
1684                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1685                 InitCommandEvent(event);
1686                 event.SetString(GetValue());
1687                 if ( GetEventHandler()->ProcessEvent(event) )
1688                     return;
1689             }
1690             //else: multiline controls need Enter for themselves
1691
1692             break;
1693
1694         case WXK_TAB:
1695             // always produce navigation event - even if we process TAB
1696             // ourselves the fact that we got here means that the user code
1697             // decided to skip processing of this TAB - probably to let it
1698             // do its default job.
1699             {
1700                 wxNavigationKeyEvent eventNav;
1701                 eventNav.SetDirection(!event.ShiftDown());
1702                 eventNav.SetWindowChange(event.ControlDown());
1703                 eventNav.SetEventObject(this);
1704
1705                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1706                     return;
1707             }
1708             break;
1709     }
1710
1711     // no, we didn't process it
1712     event.Skip();
1713 }
1714
1715 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1716 {
1717     long lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1718
1719     if ( nMsg == WM_GETDLGCODE )
1720     {
1721         // we always want the chars and the arrows: the arrows for navigation
1722         // and the chars because we want Ctrl-C to work even in a read only
1723         // control
1724         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1725
1726         if ( IsEditable() )
1727         {
1728             // we may have several different cases:
1729             // 1. normal case: both TAB and ENTER are used for dlg navigation
1730             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1731             //    next control in the dialog
1732             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1733             //    navigation
1734             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1735             //    to the next control
1736
1737             // the multiline edit control should always get <Return> for itself
1738             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1739                 lDlgCode |= DLGC_WANTMESSAGE;
1740
1741             if ( HasFlag(wxTE_PROCESS_TAB) )
1742                 lDlgCode |= DLGC_WANTTAB;
1743
1744             lRc |= lDlgCode;
1745         }
1746         else // !editable
1747         {
1748             // NB: use "=", not "|=" as the base class version returns the
1749             //     same flags is this state as usual (i.e. including
1750             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1751             //     native Win32 apps?) but for now live with it.
1752             lRc = lDlgCode;
1753         }
1754     }
1755
1756     return lRc;
1757 }
1758
1759 // ----------------------------------------------------------------------------
1760 // text control event processing
1761 // ----------------------------------------------------------------------------
1762
1763 bool wxTextCtrl::SendUpdateEvent()
1764 {
1765     // is event reporting suspended?
1766     if ( m_suppressNextUpdate )
1767     {
1768         // do process the next one
1769         m_suppressNextUpdate = FALSE;
1770
1771         return FALSE;
1772     }
1773
1774     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1775     InitCommandEvent(event);
1776     event.SetString(GetValue());
1777
1778     return ProcessCommand(event);
1779 }
1780
1781 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1782 {
1783     switch ( param )
1784     {
1785         case EN_SETFOCUS:
1786         case EN_KILLFOCUS:
1787             {
1788                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1789                                                          : wxEVT_SET_FOCUS,
1790                                    m_windowId);
1791                 event.SetEventObject(this);
1792                 GetEventHandler()->ProcessEvent(event);
1793             }
1794             break;
1795
1796         case EN_CHANGE:
1797             SendUpdateEvent();
1798             break;
1799
1800         case EN_MAXTEXT:
1801             // the text size limit has been hit -- try to increase it
1802             if ( !AdjustSpaceLimit() )
1803             {
1804                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1805                 InitCommandEvent(event);
1806                 event.SetString(GetValue());
1807                 ProcessCommand(event);
1808             }
1809             break;
1810
1811             // the other edit notification messages are not processed
1812         default:
1813             return FALSE;
1814     }
1815
1816     // processed
1817     return TRUE;
1818 }
1819
1820 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1821 #if wxUSE_CTL3D
1822                                WXUINT message,
1823                                WXWPARAM wParam,
1824                                WXLPARAM lParam
1825 #else
1826                                WXUINT WXUNUSED(message),
1827                                WXWPARAM WXUNUSED(wParam),
1828                                WXLPARAM WXUNUSED(lParam)
1829 #endif
1830     )
1831 {
1832 #if wxUSE_CTL3D
1833     if ( m_useCtl3D )
1834     {
1835         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1836         return (WXHBRUSH) hbrush;
1837     }
1838 #endif // wxUSE_CTL3D
1839
1840     HDC hdc = (HDC)pDC;
1841     wxColour colBack = GetBackgroundColour();
1842
1843     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1844         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1845
1846     ::SetBkColor(hdc, wxColourToRGB(colBack));
1847     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1848
1849     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1850
1851     return (WXHBRUSH)brush->GetResourceHandle();
1852 }
1853
1854 // In WIN16, need to override normal erasing because
1855 // Ctl3D doesn't use the wxWindows background colour.
1856 #ifdef __WIN16__
1857 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1858 {
1859     wxColour col(m_backgroundColour);
1860
1861 #if wxUSE_CTL3D
1862     if (m_useCtl3D)
1863         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1864 #endif
1865
1866     RECT rect;
1867     ::GetClientRect(GetHwnd(), &rect);
1868
1869     COLORREF ref = wxColourToRGB(col);
1870     HBRUSH hBrush = ::CreateSolidBrush(ref);
1871     if ( !hBrush )
1872         wxLogLastError(wxT("CreateSolidBrush"));
1873
1874     HDC hdc = (HDC)event.GetDC()->GetHDC();
1875
1876     int mode = ::SetMapMode(hdc, MM_TEXT);
1877
1878     ::FillRect(hdc, &rect, hBrush);
1879     ::DeleteObject(hBrush);
1880     ::SetMapMode(hdc, mode);
1881
1882 }
1883 #endif // Win16
1884
1885 bool wxTextCtrl::AdjustSpaceLimit()
1886 {
1887 #ifndef __WIN16__
1888     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1889
1890     // HACK: we try to automatically extend the limit for the amount of text
1891     //       to allow (interactively) entering more than 64Kb of text under
1892     //       Win9x but we shouldn't reset the text limit which was previously
1893     //       set explicitly with SetMaxLength()
1894     //
1895     //       we could solve this by storing the limit we set in wxTextCtrl but
1896     //       to save space we prefer to simply test here the actual limit
1897     //       value: we consider that SetMaxLength() can only be called for
1898     //       values < 32Kb
1899     if ( limit < 0x8000 )
1900     {
1901         // we've got more text than limit set by SetMaxLength()
1902         return FALSE;
1903     }
1904
1905     unsigned int len = ::GetWindowTextLength(GetHwnd());
1906     if ( len >= limit )
1907     {
1908         limit = len + 0x8000;    // 32Kb
1909
1910 #if wxUSE_RICHEDIT
1911         if ( IsRich() )
1912         {
1913             // as a nice side effect, this also allows passing limit > 64Kb
1914             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1915         }
1916         else
1917 #endif // wxUSE_RICHEDIT
1918         {
1919             if ( limit > 0xffff )
1920             {
1921                 // this will set it to a platform-dependent maximum (much more
1922                 // than 64Kb under NT)
1923                 limit = 0;
1924             }
1925
1926             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1927         }
1928     }
1929 #endif // !Win16
1930
1931     // we changed the limit
1932     return TRUE;
1933 }
1934
1935 bool wxTextCtrl::AcceptsFocus() const
1936 {
1937     // we don't want focus if we can't be edited unless we're a multiline
1938     // control because then it might be still nice to get focus from keyboard
1939     // to be able to scroll it without mouse
1940     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1941 }
1942
1943 wxSize wxTextCtrl::DoGetBestSize() const
1944 {
1945     int cx, cy;
1946     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1947
1948     int wText = DEFAULT_ITEM_WIDTH;
1949
1950     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1951     if ( m_windowStyle & wxTE_MULTILINE )
1952     {
1953         hText *= wxMax(GetNumberOfLines(), 5);
1954     }
1955     //else: for single line control everything is ok
1956
1957     return wxSize(wText, hText);
1958 }
1959
1960 // ----------------------------------------------------------------------------
1961 // standard handlers for standard edit menu events
1962 // ----------------------------------------------------------------------------
1963
1964 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1965 {
1966     Cut();
1967 }
1968
1969 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1970 {
1971     Copy();
1972 }
1973
1974 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1975 {
1976     Paste();
1977 }
1978
1979 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1980 {
1981     Undo();
1982 }
1983
1984 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1985 {
1986     Redo();
1987 }
1988
1989 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
1990 {
1991     long from, to;
1992     GetSelection(& from, & to);
1993     if (from != -1 && to != -1)
1994         Remove(from, to);
1995 }
1996
1997 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1998 {
1999     SetSelection(-1, -1);
2000 }
2001
2002 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2003 {
2004     event.Enable( CanCut() );
2005 }
2006
2007 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2008 {
2009     event.Enable( CanCopy() );
2010 }
2011
2012 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2013 {
2014     event.Enable( CanPaste() );
2015 }
2016
2017 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2018 {
2019     event.Enable( CanUndo() );
2020 }
2021
2022 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2023 {
2024     event.Enable( CanRedo() );
2025 }
2026
2027 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
2028 {
2029     long from, to;
2030     GetSelection(& from, & to);
2031     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
2032 }
2033
2034 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2035 {
2036     event.Enable(GetLastPosition() > 0);
2037 }
2038
2039 void wxTextCtrl::OnRightClick(wxMouseEvent& event)
2040 {
2041 #if wxUSE_RICHEDIT
2042     if (IsRich())
2043     {
2044         if (!m_privateContextMenu)
2045         {
2046             m_privateContextMenu = new wxMenu;
2047             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
2048             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
2049             m_privateContextMenu->AppendSeparator();
2050             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
2051             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
2052             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
2053             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
2054             m_privateContextMenu->AppendSeparator();
2055             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
2056         }
2057         PopupMenu(m_privateContextMenu, event.GetPosition());
2058         return;
2059     }
2060     else
2061 #endif
2062     event.Skip();
2063 }
2064
2065 void wxTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
2066 {
2067     // be sure the caret remains invisible if the user had hidden it
2068     if ( !m_isNativeCaretShown )
2069     {
2070         ::HideCaret(GetHwnd());
2071     }
2072 }
2073
2074 // the rest of the file only deals with the rich edit controls
2075 #if wxUSE_RICHEDIT
2076
2077 // ----------------------------------------------------------------------------
2078 // EN_LINK processing
2079 // ----------------------------------------------------------------------------
2080
2081 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
2082 {
2083     NMHDR *hdr = (NMHDR* )lParam;
2084     switch ( hdr->code )
2085     {
2086        case EN_MSGFILTER:
2087             {
2088                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
2089                 UINT msg = msgf->msg;
2090
2091                 // this is a bit crazy but richedit 1.0 sends us all mouse
2092                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
2093                 // generate the wxWin events for this message manually
2094                 //
2095                 // NB: in fact, this is still not totally correct as it does
2096                 //     send us WM_LBUTTONUP if the selection was cleared by the
2097                 //     last click -- so currently we get 2 events in this case,
2098                 //     but as I don't see any obvious way to check for this I
2099                 //     leave this code in place because it's still better than
2100                 //     not getting left up events at all
2101                 if ( msg == WM_LBUTTONUP )
2102                 {
2103                     WXUINT flags = msgf->wParam;
2104                     int x = GET_X_LPARAM(msgf->lParam),
2105                         y = GET_Y_LPARAM(msgf->lParam);
2106
2107                     HandleMouseEvent(msg, x, y, flags);
2108                 }
2109             }
2110
2111             // return TRUE to process the event (and FALSE to ignore it)
2112             return TRUE;
2113
2114         case EN_LINK:
2115             {
2116                 const ENLINK *enlink = (ENLINK *)hdr;
2117
2118                 switch ( enlink->msg )
2119                 {
2120                     case WM_SETCURSOR:
2121                         // ok, so it is hardcoded - do we really nee to
2122                         // customize it?
2123                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
2124                         *result = TRUE;
2125                         break;
2126
2127                     case WM_MOUSEMOVE:
2128                     case WM_LBUTTONDOWN:
2129                     case WM_LBUTTONUP:
2130                     case WM_LBUTTONDBLCLK:
2131                     case WM_RBUTTONDOWN:
2132                     case WM_RBUTTONUP:
2133                     case WM_RBUTTONDBLCLK:
2134                         // send a mouse event
2135                         {
2136                             static const wxEventType eventsMouse[] =
2137                             {
2138                                 wxEVT_MOTION,
2139                                 wxEVT_LEFT_DOWN,
2140                                 wxEVT_LEFT_UP,
2141                                 wxEVT_LEFT_DCLICK,
2142                                 wxEVT_RIGHT_DOWN,
2143                                 wxEVT_RIGHT_UP,
2144                                 wxEVT_RIGHT_DCLICK,
2145                             };
2146
2147                             // the event ids are consecutive
2148                             wxMouseEvent
2149                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
2150
2151                             InitMouseEvent(evtMouse,
2152                                            GET_X_LPARAM(enlink->lParam),
2153                                            GET_Y_LPARAM(enlink->lParam),
2154                                            enlink->wParam);
2155
2156                             wxTextUrlEvent event(m_windowId, evtMouse,
2157                                                  enlink->chrg.cpMin,
2158                                                  enlink->chrg.cpMax);
2159
2160                             InitCommandEvent(event);
2161
2162                             *result = ProcessCommand(event);
2163                         }
2164                         break;
2165                 }
2166             }
2167             return TRUE;
2168     }
2169
2170     // not processed, leave it to the base class
2171     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
2172 }
2173
2174 // ----------------------------------------------------------------------------
2175 // colour setting for the rich edit controls
2176 // ----------------------------------------------------------------------------
2177
2178 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
2179 {
2180     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
2181     {
2182         // colour didn't really change
2183         return FALSE;
2184     }
2185
2186     if ( IsRich() )
2187     {
2188         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
2189         // EM_SETBKGNDCOLOR additionally
2190         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
2191     }
2192
2193     return TRUE;
2194 }
2195
2196 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
2197 {
2198     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
2199     {
2200         // colour didn't really change
2201         return FALSE;
2202     }
2203
2204     if ( IsRich() )
2205     {
2206         // change the colour of everything
2207         CHARFORMAT cf;
2208         wxZeroMemory(cf);
2209         cf.cbSize = sizeof(cf);
2210         cf.dwMask = CFM_COLOR;
2211         cf.crTextColor = wxColourToRGB(colour);
2212         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
2213     }
2214
2215     return TRUE;
2216 }
2217
2218 // ----------------------------------------------------------------------------
2219 // styling support for rich edit controls
2220 // ----------------------------------------------------------------------------
2221
2222 #if wxUSE_RICHEDIT
2223
2224 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2225 {
2226     if ( !IsRich() )
2227     {
2228         // can't do it with normal text control
2229         return FALSE;
2230     }
2231
2232     // the richedit 1.0 doesn't handle setting background colour, so don't
2233     // even try to do anything if it's the only thing we want to change
2234     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
2235         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
2236         !style.HasTabs() )
2237     {
2238         // nothing to do: return TRUE if there was really nothing to do and
2239         // FALSE if we failed to set bg colour
2240         return !style.HasBackgroundColour();
2241     }
2242
2243     // order the range if needed
2244     if ( start > end )
2245     {
2246         long tmp = start;
2247         start = end;
2248         end = tmp;
2249     }
2250
2251     // we can only change the format of the selection, so select the range we
2252     // want and restore the old selection later
2253     long startOld, endOld;
2254     GetSelection(&startOld, &endOld);
2255
2256     // but do we really have to change the selection?
2257     bool changeSel = start != startOld || end != endOld;
2258
2259     if ( changeSel )
2260     {
2261         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
2262     }
2263
2264     // initialize CHARFORMAT struct
2265 #if wxUSE_RICHEDIT2
2266     CHARFORMAT2 cf;
2267 #else
2268     CHARFORMAT cf;
2269 #endif
2270
2271     wxZeroMemory(cf);
2272
2273     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2274     // CHARFORMAT in that case
2275 #if wxUSE_RICHEDIT2
2276     if ( m_verRichEdit == 1 )
2277     {
2278         // this is the only thing the control is going to grok
2279         cf.cbSize = sizeof(CHARFORMAT);
2280     }
2281     else
2282 #endif
2283     {
2284         // CHARFORMAT or CHARFORMAT2
2285         cf.cbSize = sizeof(cf);
2286     }
2287
2288     if ( style.HasFont() )
2289     {
2290         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
2291         //     but using it doesn't seem to hurt neither so leaving it for now
2292
2293         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
2294                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
2295
2296         // fill in data from LOGFONT but recalculate lfHeight because we need
2297         // the real height in twips and not the negative number which
2298         // wxFillLogFont() returns (this is correct in general and works with
2299         // the Windows font mapper, but not here)
2300         LOGFONT lf;
2301         wxFillLogFont(&lf, &style.GetFont());
2302         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
2303         cf.bCharSet = lf.lfCharSet;
2304         cf.bPitchAndFamily = lf.lfPitchAndFamily;
2305         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
2306
2307         // also deal with underline/italic/bold attributes: note that we must
2308         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
2309         // style to allow clearing it
2310         if ( lf.lfItalic )
2311         {
2312             cf.dwEffects |= CFE_ITALIC;
2313         }
2314
2315         if ( lf.lfWeight == FW_BOLD )
2316         {
2317             cf.dwEffects |= CFE_BOLD;
2318         }
2319
2320         if ( lf.lfUnderline )
2321         {
2322             cf.dwEffects |= CFE_UNDERLINE;
2323         }
2324
2325         // strikeout fonts are not supported by wxWindows
2326     }
2327
2328     if ( style.HasTextColour() )
2329     {
2330         cf.dwMask |= CFM_COLOR;
2331         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2332     }
2333
2334 #if wxUSE_RICHEDIT2
2335     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2336     {
2337         cf.dwMask |= CFM_BACKCOLOR;
2338         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2339     }
2340 #endif // wxUSE_RICHEDIT2
2341
2342     // do format the selection
2343     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
2344                             SCF_SELECTION, (LPARAM)&cf) != 0;
2345     if ( !ok )
2346     {
2347         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
2348     }
2349
2350     // now do the paragraph formatting
2351     PARAFORMAT2 pf;
2352     wxZeroMemory(pf);
2353     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2354     // PARAFORMAT in that case
2355 #if wxUSE_RICHEDIT2
2356     if ( m_verRichEdit == 1 )
2357     {
2358         // this is the only thing the control is going to grok
2359         pf.cbSize = sizeof(PARAFORMAT);
2360     }
2361     else
2362 #endif
2363     {
2364         // PARAFORMAT or PARAFORMAT2
2365         pf.cbSize = sizeof(pf);
2366     }
2367
2368     if (style.HasAlignment())
2369     {
2370         pf.dwMask |= PFM_ALIGNMENT;
2371         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2372             pf.wAlignment = PFA_RIGHT;
2373         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2374             pf.wAlignment = PFA_CENTER;
2375         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2376             pf.wAlignment = PFA_JUSTIFY;
2377         else
2378             pf.wAlignment = PFA_LEFT;
2379     }
2380
2381     if (style.HasLeftIndent())
2382     {
2383         pf.dwMask |= PFM_STARTINDENT;
2384
2385         // Convert from 1/10 mm to TWIPS
2386         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2387
2388         // TODO: do we need to specify dxOffset?
2389     }
2390
2391     if (style.HasRightIndent())
2392     {
2393         pf.dwMask |= PFM_RIGHTINDENT;
2394
2395         // Convert from 1/10 mm to TWIPS
2396         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2397     }
2398
2399     if (style.HasTabs())
2400     {
2401         pf.dwMask |= PFM_TABSTOPS;
2402
2403         const wxArrayInt& tabs = style.GetTabs();
2404
2405         pf.cTabCount = wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2406         size_t i;
2407         for (i = 0; i < (size_t) pf.cTabCount; i++)
2408         {
2409             // Convert from 1/10 mm to TWIPS
2410             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2411         }
2412     }
2413
2414     if (pf.dwMask != 0)
2415     {
2416         // do format the selection
2417         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2418             0, (LPARAM) &pf) != 0;
2419         if ( !ok )
2420         {
2421             wxLogDebug(_T("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2422         }
2423     }
2424
2425     if ( changeSel )
2426     {
2427         // restore the original selection
2428         DoSetSelection(startOld, endOld, FALSE);
2429     }
2430
2431     return ok;
2432 }
2433
2434 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2435 {
2436     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2437         return FALSE;
2438
2439     // we have to do this or the style wouldn't apply for the text typed by the
2440     // user
2441     long posLast = GetLastPosition();
2442     SetStyle(posLast, posLast, m_defaultStyle);
2443
2444     return TRUE;
2445 }
2446
2447 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2448 {
2449     if ( !IsRich() )
2450     {
2451         // can't do it with normal text control
2452         return FALSE;
2453     }
2454
2455     // initialize CHARFORMAT struct
2456 #if wxUSE_RICHEDIT2
2457     CHARFORMAT2 cf;
2458 #else
2459     CHARFORMAT cf;
2460 #endif
2461
2462     wxZeroMemory(cf);
2463
2464     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2465     // CHARFORMAT in that case
2466 #if wxUSE_RICHEDIT2
2467     if ( m_verRichEdit == 1 )
2468     {
2469         // this is the only thing the control is going to grok
2470         cf.cbSize = sizeof(CHARFORMAT);
2471     }
2472     else
2473 #endif
2474     {
2475         // CHARFORMAT or CHARFORMAT2
2476         cf.cbSize = sizeof(cf);
2477     }
2478     // we can only change the format of the selection, so select the range we
2479     // want and restore the old selection later
2480     long startOld, endOld;
2481     GetSelection(&startOld, &endOld);
2482
2483     // but do we really have to change the selection?
2484     bool changeSel = position != startOld || position != endOld;
2485
2486     if ( changeSel )
2487     {
2488         DoSetSelection(position, position, FALSE /* don't scroll caret into view */);
2489     }
2490
2491     // get the selection formatting
2492     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2493                             SCF_SELECTION, (LPARAM)&cf) ;
2494
2495     LOGFONT lf;
2496     lf.lfHeight = cf.yHeight;
2497     lf.lfWidth = 0;
2498     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2499     lf.lfClipPrecision = 0;
2500     lf.lfEscapement = 0;
2501     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2502     if (cf.dwEffects & CFE_ITALIC)
2503         lf.lfItalic = TRUE;
2504     lf.lfOrientation = 0;
2505     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2506     lf.lfQuality = 0;
2507     if (cf.dwEffects & CFE_STRIKEOUT)
2508         lf.lfStrikeOut = TRUE;
2509     if (cf.dwEffects & CFE_UNDERLINE)
2510         lf.lfUnderline = TRUE;
2511     if (cf.dwEffects & CFE_BOLD)
2512         lf.lfWeight = FW_BOLD;
2513
2514     wxFont font = wxCreateFontFromLogFont(& lf);
2515     if (font.Ok())
2516     {
2517         style.SetFont(font);
2518     }
2519     style.SetTextColour(wxColour(cf.crTextColor));
2520
2521 #if wxUSE_RICHEDIT2
2522     if ( m_verRichEdit != 1 )
2523     {
2524         // cf.dwMask |= CFM_BACKCOLOR;
2525         style.SetBackgroundColour(wxColour(cf.crBackColor));
2526     }
2527 #endif // wxUSE_RICHEDIT2
2528
2529     // now get the paragraph formatting
2530     PARAFORMAT2 pf;
2531     wxZeroMemory(pf);
2532     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2533     // PARAFORMAT in that case
2534 #if wxUSE_RICHEDIT2
2535     if ( m_verRichEdit == 1 )
2536     {
2537         // this is the only thing the control is going to grok
2538         pf.cbSize = sizeof(PARAFORMAT);
2539     }
2540     else
2541 #endif
2542     {
2543         // PARAFORMAT or PARAFORMAT2
2544         pf.cbSize = sizeof(pf);
2545     }
2546
2547     // do format the selection
2548     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2549
2550     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0) );
2551     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2552
2553     if (pf.wAlignment == PFA_CENTER)
2554         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2555     else if (pf.wAlignment == PFA_RIGHT)
2556         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2557     else if (pf.wAlignment == PFA_JUSTIFY)
2558         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2559     else
2560         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2561
2562     wxArrayInt tabStops;
2563     size_t i;
2564     for (i = 0; i < (size_t) pf.cTabCount; i++)
2565     {
2566         tabStops[i] = (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) ;
2567     }
2568
2569     if ( changeSel )
2570     {
2571         // restore the original selection
2572         DoSetSelection(startOld, endOld, FALSE);
2573     }
2574
2575     return TRUE;
2576 }
2577
2578 #endif
2579
2580 // ----------------------------------------------------------------------------
2581 // wxRichEditModule
2582 // ----------------------------------------------------------------------------
2583
2584 bool wxRichEditModule::OnInit()
2585 {
2586     // don't do anything - we will load it when needed
2587     return TRUE;
2588 }
2589
2590 void wxRichEditModule::OnExit()
2591 {
2592     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2593     {
2594         if ( ms_hRichEdit[i] )
2595         {
2596             ::FreeLibrary(ms_hRichEdit[i]);
2597             ms_hRichEdit[i] = NULL;
2598         }
2599     }
2600 }
2601
2602 /* static */
2603 bool wxRichEditModule::Load(int version)
2604 {
2605     // we don't support loading richedit 3.0 as I don't know how to distinguish
2606     // it from 2.0 anyhow
2607     wxCHECK_MSG( version == 1 || version == 2, FALSE,
2608                  _T("incorrect richedit control version requested") );
2609
2610     // make it the index in the array
2611     version--;
2612
2613     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2614     {
2615         // we had already tried to load it and failed
2616         return FALSE;
2617     }
2618
2619     if ( ms_hRichEdit[version] )
2620     {
2621         // we've already got this one
2622         return TRUE;
2623     }
2624
2625     wxString dllname = version ? _T("riched20") : _T("riched32");
2626     dllname += _T(".dll");
2627
2628     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2629
2630     if ( !ms_hRichEdit[version] )
2631     {
2632         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2633
2634         ms_hRichEdit[version] = (HINSTANCE)-1;
2635
2636         return FALSE;
2637     }
2638
2639     return TRUE;
2640 }
2641
2642 #endif // wxUSE_RICHEDIT
2643
2644 #endif // wxUSE_TEXTCTRL