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 // Editing
1261 // ----------------------------------------------------------------------------
1262
1263 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1264 {
1265     // Set selection and remove it
1266     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
1267
1268     DoWriteText(value, TRUE /* selection only */);
1269 }
1270
1271 void wxTextCtrl::Remove(long from, long to)
1272 {
1273     Replace(from, to, wxEmptyString);
1274 }
1275
1276 bool wxTextCtrl::LoadFile(const wxString& file)
1277 {
1278     if ( wxTextCtrlBase::LoadFile(file) )
1279     {
1280         // update the size limit if needed
1281         AdjustSpaceLimit();
1282
1283         return TRUE;
1284     }
1285
1286     return FALSE;
1287 }
1288
1289 bool wxTextCtrl::IsModified() const
1290 {
1291     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1292 }
1293
1294 void wxTextCtrl::MarkDirty()
1295 {
1296     SendMessage(GetHwnd(), EM_SETMODIFY, TRUE, 0L);
1297 }
1298
1299 void wxTextCtrl::DiscardEdits()
1300 {
1301     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1302 }
1303
1304 int wxTextCtrl::GetNumberOfLines() const
1305 {
1306     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
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 void wxTextCtrl::ShowPosition(long pos)
1357 {
1358     HWND hWnd = GetHwnd();
1359
1360     // To scroll to a position, we pass the number of lines and characters
1361     // to scroll *by*. This means that we need to:
1362     // (1) Find the line position of the current line.
1363     // (2) Find the line position of pos.
1364     // (3) Scroll by (pos - current).
1365     // For now, ignore the horizontal scrolling.
1366
1367     // Is this where scrolling is relative to - the line containing the caret?
1368     // Or is the first visible line??? Try first visible line.
1369 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1370
1371     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1372
1373     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1374
1375     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1376
1377     if (linesToScroll != 0)
1378       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1379 }
1380
1381 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1382 {
1383     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1384 }
1385
1386 int wxTextCtrl::GetLineLength(long lineNo) const
1387 {
1388     long pos = XYToPosition(0, lineNo);
1389
1390     return GetLengthOfLineContainingPos(pos);
1391 }
1392
1393 wxString wxTextCtrl::GetLineText(long lineNo) const
1394 {
1395     size_t len = (size_t)GetLineLength(lineNo) + 1;
1396
1397     // there must be at least enough place for the length WORD in the
1398     // buffer
1399     len += sizeof(WORD);
1400
1401     wxString str;
1402     {
1403         wxStringBufferLength tmp(str, len);
1404         wxChar *buf = tmp;
1405
1406         *(WORD *)buf = (WORD)len;
1407         len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1408
1409 #if wxUSE_RICHEDIT
1410         if ( IsRich() )
1411         {
1412             // remove the '\r' returned by the rich edit control, the user code
1413             // should never see it
1414             if ( buf[len - 2] == _T('\r') && buf[len - 1] == _T('\n') )
1415             {
1416                 buf[len - 2] = _T('\n');
1417                 len--;
1418             }
1419         }
1420 #endif // wxUSE_RICHEDIT
1421
1422         // remove the '\n' at the end, if any (this is how this function is
1423         // supposed to work according to the docs)
1424         if ( buf[len - 1] == _T('\n') )
1425         {
1426             len--;
1427         }
1428
1429         buf[len] = 0;
1430         tmp.SetLength(len);
1431     }
1432
1433     return str;
1434 }
1435
1436 void wxTextCtrl::SetMaxLength(unsigned long len)
1437 {
1438     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1439 }
1440
1441 // ----------------------------------------------------------------------------
1442 // Undo/redo
1443 // ----------------------------------------------------------------------------
1444
1445 void wxTextCtrl::Undo()
1446 {
1447     if (CanUndo())
1448     {
1449         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1450     }
1451 }
1452
1453 void wxTextCtrl::Redo()
1454 {
1455     if (CanRedo())
1456     {
1457         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1458         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1459     }
1460 }
1461
1462 bool wxTextCtrl::CanUndo() const
1463 {
1464     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1465 }
1466
1467 bool wxTextCtrl::CanRedo() const
1468 {
1469     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1470 }
1471
1472 // ----------------------------------------------------------------------------
1473 // caret handling (Windows only)
1474 // ----------------------------------------------------------------------------
1475
1476 bool wxTextCtrl::ShowNativeCaret(bool show)
1477 {
1478     if ( show != m_isNativeCaretShown )
1479     {
1480         if ( !(show ? ::ShowCaret(GetHwnd()) : ::HideCaret(GetHwnd())) )
1481         {
1482             // not an error, may simply indicate that it's not shown/hidden
1483             // yet (i.e. it had been hidden/showh 2 times before)
1484             return false;
1485         }
1486
1487         m_isNativeCaretShown = show;
1488     }
1489
1490     return true;
1491 }
1492
1493 // ----------------------------------------------------------------------------
1494 // implemenation details
1495 // ----------------------------------------------------------------------------
1496
1497 void wxTextCtrl::Command(wxCommandEvent & event)
1498 {
1499     SetValue(event.GetString());
1500     ProcessCommand (event);
1501 }
1502
1503 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1504 {
1505     // By default, load the first file into the text window.
1506     if (event.GetNumberOfFiles() > 0)
1507     {
1508         LoadFile(event.GetFiles()[0]);
1509     }
1510 }
1511
1512 // ----------------------------------------------------------------------------
1513 // kbd input processing
1514 // ----------------------------------------------------------------------------
1515
1516 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1517 {
1518     MSG *msg = (MSG *)pMsg;
1519
1520     // check for our special keys here: if we don't do it and the parent frame
1521     // uses them as accelerators, they wouldn't work at all, so we disable
1522     // usual preprocessing for them
1523     if ( msg->message == WM_KEYDOWN )
1524     {
1525         WORD vkey = (WORD) msg->wParam;
1526         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1527         {
1528             if ( vkey == VK_BACK )
1529                 return FALSE;
1530         }
1531         else // no Alt
1532         {
1533             // we want to process some Ctrl-foo and Shift-bar but no key
1534             // combinations without either Ctrl or Shift nor with both of them
1535             // pressed
1536             const int ctrl = wxIsCtrlDown(),
1537                       shift = wxIsShiftDown();
1538             switch ( ctrl + shift )
1539             {
1540                 default:
1541                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1542                     // fall through
1543
1544                 case 0:
1545                 case 2:
1546                     break;
1547
1548                 case 1:
1549                     // either Ctrl or Shift pressed
1550                     if ( ctrl )
1551                     {
1552                         switch ( vkey )
1553                         {
1554                             case 'C':
1555                             case 'V':
1556                             case 'X':
1557                             case VK_INSERT:
1558                             case VK_DELETE:
1559                             case VK_HOME:
1560                             case VK_END:
1561                                 return FALSE;
1562                         }
1563                     }
1564                     else // Shift is pressed
1565                     {
1566                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1567                             return FALSE;
1568                     }
1569             }
1570         }
1571     }
1572
1573     return wxControl::MSWShouldPreProcessMessage(pMsg);
1574 }
1575
1576 void wxTextCtrl::OnChar(wxKeyEvent& event)
1577 {
1578     switch ( event.GetKeyCode() )
1579     {
1580         case WXK_RETURN:
1581             if ( !(m_windowStyle & wxTE_MULTILINE) )
1582             {
1583                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1584                 InitCommandEvent(event);
1585                 event.SetString(GetValue());
1586                 if ( GetEventHandler()->ProcessEvent(event) )
1587                     return;
1588             }
1589             //else: multiline controls need Enter for themselves
1590
1591             break;
1592
1593         case WXK_TAB:
1594             // always produce navigation event - even if we process TAB
1595             // ourselves the fact that we got here means that the user code
1596             // decided to skip processing of this TAB - probably to let it
1597             // do its default job.
1598             {
1599                 wxNavigationKeyEvent eventNav;
1600                 eventNav.SetDirection(!event.ShiftDown());
1601                 eventNav.SetWindowChange(event.ControlDown());
1602                 eventNav.SetEventObject(this);
1603
1604                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1605                     return;
1606             }
1607             break;
1608     }
1609
1610     // no, we didn't process it
1611     event.Skip();
1612 }
1613
1614 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1615 {
1616     long lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1617
1618     if ( nMsg == WM_GETDLGCODE )
1619     {
1620         // we always want the chars and the arrows: the arrows for navigation
1621         // and the chars because we want Ctrl-C to work even in a read only
1622         // control
1623         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1624
1625         if ( IsEditable() )
1626         {
1627             // we may have several different cases:
1628             // 1. normal case: both TAB and ENTER are used for dlg navigation
1629             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1630             //    next control in the dialog
1631             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1632             //    navigation
1633             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1634             //    to the next control
1635
1636             // the multiline edit control should always get <Return> for itself
1637             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1638                 lDlgCode |= DLGC_WANTMESSAGE;
1639
1640             if ( HasFlag(wxTE_PROCESS_TAB) )
1641                 lDlgCode |= DLGC_WANTTAB;
1642
1643             lRc |= lDlgCode;
1644         }
1645         else // !editable
1646         {
1647             // NB: use "=", not "|=" as the base class version returns the
1648             //     same flags is this state as usual (i.e. including
1649             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1650             //     native Win32 apps?) but for now live with it.
1651             lRc = lDlgCode;
1652         }
1653     }
1654
1655     return lRc;
1656 }
1657
1658 // ----------------------------------------------------------------------------
1659 // text control event processing
1660 // ----------------------------------------------------------------------------
1661
1662 bool wxTextCtrl::SendUpdateEvent()
1663 {
1664     // is event reporting suspended?
1665     if ( m_suppressNextUpdate )
1666     {
1667         // do process the next one
1668         m_suppressNextUpdate = FALSE;
1669
1670         return FALSE;
1671     }
1672
1673     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1674     InitCommandEvent(event);
1675     event.SetString(GetValue());
1676
1677     return ProcessCommand(event);
1678 }
1679
1680 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1681 {
1682     switch ( param )
1683     {
1684         case EN_SETFOCUS:
1685         case EN_KILLFOCUS:
1686             {
1687                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1688                                                          : wxEVT_SET_FOCUS,
1689                                    m_windowId);
1690                 event.SetEventObject(this);
1691                 GetEventHandler()->ProcessEvent(event);
1692             }
1693             break;
1694
1695         case EN_CHANGE:
1696             SendUpdateEvent();
1697             break;
1698
1699         case EN_MAXTEXT:
1700             // the text size limit has been hit -- try to increase it
1701             if ( !AdjustSpaceLimit() )
1702             {
1703                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1704                 InitCommandEvent(event);
1705                 event.SetString(GetValue());
1706                 ProcessCommand(event);
1707             }
1708             break;
1709
1710             // the other edit notification messages are not processed
1711         default:
1712             return FALSE;
1713     }
1714
1715     // processed
1716     return TRUE;
1717 }
1718
1719 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1720 #if wxUSE_CTL3D
1721                                WXUINT message,
1722                                WXWPARAM wParam,
1723                                WXLPARAM lParam
1724 #else
1725                                WXUINT WXUNUSED(message),
1726                                WXWPARAM WXUNUSED(wParam),
1727                                WXLPARAM WXUNUSED(lParam)
1728 #endif
1729     )
1730 {
1731 #if wxUSE_CTL3D
1732     if ( m_useCtl3D )
1733     {
1734         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1735         return (WXHBRUSH) hbrush;
1736     }
1737 #endif // wxUSE_CTL3D
1738
1739     HDC hdc = (HDC)pDC;
1740     wxColour colBack = GetBackgroundColour();
1741
1742     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1743         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1744
1745     ::SetBkColor(hdc, wxColourToRGB(colBack));
1746     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1747
1748     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1749
1750     return (WXHBRUSH)brush->GetResourceHandle();
1751 }
1752
1753 // In WIN16, need to override normal erasing because
1754 // Ctl3D doesn't use the wxWindows background colour.
1755 #ifdef __WIN16__
1756 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1757 {
1758     wxColour col(m_backgroundColour);
1759
1760 #if wxUSE_CTL3D
1761     if (m_useCtl3D)
1762         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1763 #endif
1764
1765     RECT rect;
1766     ::GetClientRect(GetHwnd(), &rect);
1767
1768     COLORREF ref = wxColourToRGB(col);
1769     HBRUSH hBrush = ::CreateSolidBrush(ref);
1770     if ( !hBrush )
1771         wxLogLastError(wxT("CreateSolidBrush"));
1772
1773     HDC hdc = (HDC)event.GetDC()->GetHDC();
1774
1775     int mode = ::SetMapMode(hdc, MM_TEXT);
1776
1777     ::FillRect(hdc, &rect, hBrush);
1778     ::DeleteObject(hBrush);
1779     ::SetMapMode(hdc, mode);
1780
1781 }
1782 #endif // Win16
1783
1784 bool wxTextCtrl::AdjustSpaceLimit()
1785 {
1786 #ifndef __WIN16__
1787     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1788
1789     // HACK: we try to automatically extend the limit for the amount of text
1790     //       to allow (interactively) entering more than 64Kb of text under
1791     //       Win9x but we shouldn't reset the text limit which was previously
1792     //       set explicitly with SetMaxLength()
1793     //
1794     //       we could solve this by storing the limit we set in wxTextCtrl but
1795     //       to save space we prefer to simply test here the actual limit
1796     //       value: we consider that SetMaxLength() can only be called for
1797     //       values < 32Kb
1798     if ( limit < 0x8000 )
1799     {
1800         // we've got more text than limit set by SetMaxLength()
1801         return FALSE;
1802     }
1803
1804     unsigned int len = ::GetWindowTextLength(GetHwnd());
1805     if ( len >= limit )
1806     {
1807         limit = len + 0x8000;    // 32Kb
1808
1809 #if wxUSE_RICHEDIT
1810         if ( IsRich() )
1811         {
1812             // as a nice side effect, this also allows passing limit > 64Kb
1813             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1814         }
1815         else
1816 #endif // wxUSE_RICHEDIT
1817         {
1818             if ( limit > 0xffff )
1819             {
1820                 // this will set it to a platform-dependent maximum (much more
1821                 // than 64Kb under NT)
1822                 limit = 0;
1823             }
1824
1825             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1826         }
1827     }
1828 #endif // !Win16
1829
1830     // we changed the limit
1831     return TRUE;
1832 }
1833
1834 bool wxTextCtrl::AcceptsFocus() const
1835 {
1836     // we don't want focus if we can't be edited unless we're a multiline
1837     // control because then it might be still nice to get focus from keyboard
1838     // to be able to scroll it without mouse
1839     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1840 }
1841
1842 wxSize wxTextCtrl::DoGetBestSize() const
1843 {
1844     int cx, cy;
1845     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1846
1847     int wText = DEFAULT_ITEM_WIDTH;
1848
1849     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1850     if ( m_windowStyle & wxTE_MULTILINE )
1851     {
1852         hText *= wxMax(GetNumberOfLines(), 5);
1853     }
1854     //else: for single line control everything is ok
1855
1856     return wxSize(wText, hText);
1857 }
1858
1859 // ----------------------------------------------------------------------------
1860 // standard handlers for standard edit menu events
1861 // ----------------------------------------------------------------------------
1862
1863 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1864 {
1865     Cut();
1866 }
1867
1868 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1869 {
1870     Copy();
1871 }
1872
1873 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1874 {
1875     Paste();
1876 }
1877
1878 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1879 {
1880     Undo();
1881 }
1882
1883 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1884 {
1885     Redo();
1886 }
1887
1888 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
1889 {
1890     long from, to;
1891     GetSelection(& from, & to);
1892     if (from != -1 && to != -1)
1893         Remove(from, to);
1894 }
1895
1896 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1897 {
1898     SetSelection(-1, -1);
1899 }
1900
1901 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1902 {
1903     event.Enable( CanCut() );
1904 }
1905
1906 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1907 {
1908     event.Enable( CanCopy() );
1909 }
1910
1911 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1912 {
1913     event.Enable( CanPaste() );
1914 }
1915
1916 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1917 {
1918     event.Enable( CanUndo() );
1919 }
1920
1921 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1922 {
1923     event.Enable( CanRedo() );
1924 }
1925
1926 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
1927 {
1928     long from, to;
1929     GetSelection(& from, & to);
1930     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
1931 }
1932
1933 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
1934 {
1935     event.Enable(GetLastPosition() > 0);
1936 }
1937
1938 void wxTextCtrl::OnRightClick(wxMouseEvent& event)
1939 {
1940 #if wxUSE_RICHEDIT
1941     if (IsRich())
1942     {
1943         if (!m_privateContextMenu)
1944         {
1945             m_privateContextMenu = new wxMenu;
1946             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
1947             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
1948             m_privateContextMenu->AppendSeparator();
1949             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
1950             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
1951             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
1952             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
1953             m_privateContextMenu->AppendSeparator();
1954             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
1955         }
1956         PopupMenu(m_privateContextMenu, event.GetPosition());
1957         return;
1958     }
1959     else
1960 #endif
1961     event.Skip();
1962 }
1963
1964 void wxTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
1965 {
1966     // be sure the caret remains invisible if the user had hidden it
1967     if ( !m_isNativeCaretShown )
1968     {
1969         ::HideCaret(GetHwnd());
1970     }
1971 }
1972
1973 // the rest of the file only deals with the rich edit controls
1974 #if wxUSE_RICHEDIT
1975
1976 // ----------------------------------------------------------------------------
1977 // EN_LINK processing
1978 // ----------------------------------------------------------------------------
1979
1980 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1981 {
1982     NMHDR *hdr = (NMHDR* )lParam;
1983     switch ( hdr->code )
1984     {
1985        case EN_MSGFILTER:
1986             {
1987                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
1988                 UINT msg = msgf->msg;
1989
1990                 // this is a bit crazy but richedit 1.0 sends us all mouse
1991                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
1992                 // generate the wxWin events for this message manually
1993                 //
1994                 // NB: in fact, this is still not totally correct as it does
1995                 //     send us WM_LBUTTONUP if the selection was cleared by the
1996                 //     last click -- so currently we get 2 events in this case,
1997                 //     but as I don't see any obvious way to check for this I
1998                 //     leave this code in place because it's still better than
1999                 //     not getting left up events at all
2000                 if ( msg == WM_LBUTTONUP )
2001                 {
2002                     WXUINT flags = msgf->wParam;
2003                     int x = GET_X_LPARAM(msgf->lParam),
2004                         y = GET_Y_LPARAM(msgf->lParam);
2005
2006                     HandleMouseEvent(msg, x, y, flags);
2007                 }
2008             }
2009
2010             // return TRUE to process the event (and FALSE to ignore it)
2011             return TRUE;
2012
2013         case EN_LINK:
2014             {
2015                 const ENLINK *enlink = (ENLINK *)hdr;
2016
2017                 switch ( enlink->msg )
2018                 {
2019                     case WM_SETCURSOR:
2020                         // ok, so it is hardcoded - do we really nee to
2021                         // customize it?
2022                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
2023                         *result = TRUE;
2024                         break;
2025
2026                     case WM_MOUSEMOVE:
2027                     case WM_LBUTTONDOWN:
2028                     case WM_LBUTTONUP:
2029                     case WM_LBUTTONDBLCLK:
2030                     case WM_RBUTTONDOWN:
2031                     case WM_RBUTTONUP:
2032                     case WM_RBUTTONDBLCLK:
2033                         // send a mouse event
2034                         {
2035                             static const wxEventType eventsMouse[] =
2036                             {
2037                                 wxEVT_MOTION,
2038                                 wxEVT_LEFT_DOWN,
2039                                 wxEVT_LEFT_UP,
2040                                 wxEVT_LEFT_DCLICK,
2041                                 wxEVT_RIGHT_DOWN,
2042                                 wxEVT_RIGHT_UP,
2043                                 wxEVT_RIGHT_DCLICK,
2044                             };
2045
2046                             // the event ids are consecutive
2047                             wxMouseEvent
2048                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
2049
2050                             InitMouseEvent(evtMouse,
2051                                            GET_X_LPARAM(enlink->lParam),
2052                                            GET_Y_LPARAM(enlink->lParam),
2053                                            enlink->wParam);
2054
2055                             wxTextUrlEvent event(m_windowId, evtMouse,
2056                                                  enlink->chrg.cpMin,
2057                                                  enlink->chrg.cpMax);
2058
2059                             InitCommandEvent(event);
2060
2061                             *result = ProcessCommand(event);
2062                         }
2063                         break;
2064                 }
2065             }
2066             return TRUE;
2067     }
2068
2069     // not processed, leave it to the base class
2070     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
2071 }
2072
2073 // ----------------------------------------------------------------------------
2074 // colour setting for the rich edit controls
2075 // ----------------------------------------------------------------------------
2076
2077 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
2078 {
2079     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
2080     {
2081         // colour didn't really change
2082         return FALSE;
2083     }
2084
2085     if ( IsRich() )
2086     {
2087         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
2088         // EM_SETBKGNDCOLOR additionally
2089         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
2090     }
2091
2092     return TRUE;
2093 }
2094
2095 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
2096 {
2097     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
2098     {
2099         // colour didn't really change
2100         return FALSE;
2101     }
2102
2103     if ( IsRich() )
2104     {
2105         // change the colour of everything
2106         CHARFORMAT cf;
2107         wxZeroMemory(cf);
2108         cf.cbSize = sizeof(cf);
2109         cf.dwMask = CFM_COLOR;
2110         cf.crTextColor = wxColourToRGB(colour);
2111         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
2112     }
2113
2114     return TRUE;
2115 }
2116
2117 // ----------------------------------------------------------------------------
2118 // styling support for rich edit controls
2119 // ----------------------------------------------------------------------------
2120
2121 #if wxUSE_RICHEDIT
2122
2123 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2124 {
2125     if ( !IsRich() )
2126     {
2127         // can't do it with normal text control
2128         return FALSE;
2129     }
2130
2131     // the richedit 1.0 doesn't handle setting background colour, so don't
2132     // even try to do anything if it's the only thing we want to change
2133     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
2134         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
2135         !style.HasTabs() )
2136     {
2137         // nothing to do: return TRUE if there was really nothing to do and
2138         // FALSE if we failed to set bg colour
2139         return !style.HasBackgroundColour();
2140     }
2141
2142     // order the range if needed
2143     if ( start > end )
2144     {
2145         long tmp = start;
2146         start = end;
2147         end = tmp;
2148     }
2149
2150     // we can only change the format of the selection, so select the range we
2151     // want and restore the old selection later
2152     long startOld, endOld;
2153     GetSelection(&startOld, &endOld);
2154
2155     // but do we really have to change the selection?
2156     bool changeSel = start != startOld || end != endOld;
2157
2158     if ( changeSel )
2159     {
2160         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
2161     }
2162
2163     // initialize CHARFORMAT struct
2164 #if wxUSE_RICHEDIT2
2165     CHARFORMAT2 cf;
2166 #else
2167     CHARFORMAT cf;
2168 #endif
2169
2170     wxZeroMemory(cf);
2171
2172     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2173     // CHARFORMAT in that case
2174 #if wxUSE_RICHEDIT2
2175     if ( m_verRichEdit == 1 )
2176     {
2177         // this is the only thing the control is going to grok
2178         cf.cbSize = sizeof(CHARFORMAT);
2179     }
2180     else
2181 #endif
2182     {
2183         // CHARFORMAT or CHARFORMAT2
2184         cf.cbSize = sizeof(cf);
2185     }
2186
2187     if ( style.HasFont() )
2188     {
2189         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
2190         //     but using it doesn't seem to hurt neither so leaving it for now
2191
2192         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
2193                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
2194
2195         // fill in data from LOGFONT but recalculate lfHeight because we need
2196         // the real height in twips and not the negative number which
2197         // wxFillLogFont() returns (this is correct in general and works with
2198         // the Windows font mapper, but not here)
2199         LOGFONT lf;
2200         wxFillLogFont(&lf, &style.GetFont());
2201         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
2202         cf.bCharSet = lf.lfCharSet;
2203         cf.bPitchAndFamily = lf.lfPitchAndFamily;
2204         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
2205
2206         // also deal with underline/italic/bold attributes: note that we must
2207         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
2208         // style to allow clearing it
2209         if ( lf.lfItalic )
2210         {
2211             cf.dwEffects |= CFE_ITALIC;
2212         }
2213
2214         if ( lf.lfWeight == FW_BOLD )
2215         {
2216             cf.dwEffects |= CFE_BOLD;
2217         }
2218
2219         if ( lf.lfUnderline )
2220         {
2221             cf.dwEffects |= CFE_UNDERLINE;
2222         }
2223
2224         // strikeout fonts are not supported by wxWindows
2225     }
2226
2227     if ( style.HasTextColour() )
2228     {
2229         cf.dwMask |= CFM_COLOR;
2230         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2231     }
2232
2233 #if wxUSE_RICHEDIT2
2234     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2235     {
2236         cf.dwMask |= CFM_BACKCOLOR;
2237         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2238     }
2239 #endif // wxUSE_RICHEDIT2
2240
2241     // do format the selection
2242     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
2243                             SCF_SELECTION, (LPARAM)&cf) != 0;
2244     if ( !ok )
2245     {
2246         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
2247     }
2248
2249     // now do the paragraph formatting
2250     PARAFORMAT2 pf;
2251     wxZeroMemory(pf);
2252     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2253     // PARAFORMAT 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         pf.cbSize = sizeof(PARAFORMAT);
2259     }
2260     else
2261 #endif
2262     {
2263         // PARAFORMAT or PARAFORMAT2
2264         pf.cbSize = sizeof(pf);
2265     }
2266
2267     if (style.HasAlignment())
2268     {
2269         pf.dwMask |= PFM_ALIGNMENT;
2270         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2271             pf.wAlignment = PFA_RIGHT;
2272         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2273             pf.wAlignment = PFA_CENTER;
2274         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2275             pf.wAlignment = PFA_JUSTIFY;
2276         else
2277             pf.wAlignment = PFA_LEFT;
2278     }
2279
2280     if (style.HasLeftIndent())
2281     {
2282         pf.dwMask |= PFM_STARTINDENT;
2283
2284         // Convert from 1/10 mm to TWIPS
2285         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2286
2287         // TODO: do we need to specify dxOffset?
2288     }
2289
2290     if (style.HasRightIndent())
2291     {
2292         pf.dwMask |= PFM_RIGHTINDENT;
2293
2294         // Convert from 1/10 mm to TWIPS
2295         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2296     }
2297
2298     if (style.HasTabs())
2299     {
2300         pf.dwMask |= PFM_TABSTOPS;
2301
2302         const wxArrayInt& tabs = style.GetTabs();
2303
2304         pf.cTabCount = wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2305         size_t i;
2306         for (i = 0; i < (size_t) pf.cTabCount; i++)
2307         {
2308             // Convert from 1/10 mm to TWIPS
2309             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2310         }
2311     }
2312
2313     if (pf.dwMask != 0)
2314     {
2315         // do format the selection
2316         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2317             0, (LPARAM) &pf) != 0;
2318         if ( !ok )
2319         {
2320             wxLogDebug(_T("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2321         }
2322     }
2323
2324     if ( changeSel )
2325     {
2326         // restore the original selection
2327         DoSetSelection(startOld, endOld, FALSE);
2328     }
2329
2330     return ok;
2331 }
2332
2333 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2334 {
2335     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2336         return FALSE;
2337
2338     // we have to do this or the style wouldn't apply for the text typed by the
2339     // user
2340     long posLast = GetLastPosition();
2341     SetStyle(posLast, posLast, m_defaultStyle);
2342
2343     return TRUE;
2344 }
2345
2346 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2347 {
2348     if ( !IsRich() )
2349     {
2350         // can't do it with normal text control
2351         return FALSE;
2352     }
2353
2354     // initialize CHARFORMAT struct
2355 #if wxUSE_RICHEDIT2
2356     CHARFORMAT2 cf;
2357 #else
2358     CHARFORMAT cf;
2359 #endif
2360
2361     wxZeroMemory(cf);
2362
2363     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2364     // CHARFORMAT in that case
2365 #if wxUSE_RICHEDIT2
2366     if ( m_verRichEdit == 1 )
2367     {
2368         // this is the only thing the control is going to grok
2369         cf.cbSize = sizeof(CHARFORMAT);
2370     }
2371     else
2372 #endif
2373     {
2374         // CHARFORMAT or CHARFORMAT2
2375         cf.cbSize = sizeof(cf);
2376     }
2377     // we can only change the format of the selection, so select the range we
2378     // want and restore the old selection later
2379     long startOld, endOld;
2380     GetSelection(&startOld, &endOld);
2381
2382     // but do we really have to change the selection?
2383     bool changeSel = position != startOld || position != endOld;
2384
2385     if ( changeSel )
2386     {
2387         DoSetSelection(position, position, FALSE /* don't scroll caret into view */);
2388     }
2389
2390     // get the selection formatting
2391     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2392                             SCF_SELECTION, (LPARAM)&cf) ;
2393
2394     LOGFONT lf;
2395     lf.lfHeight = cf.yHeight;
2396     lf.lfWidth = 0;
2397     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2398     lf.lfClipPrecision = 0;
2399     lf.lfEscapement = 0;
2400     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2401     if (cf.dwEffects & CFE_ITALIC)
2402         lf.lfItalic = TRUE;
2403     lf.lfOrientation = 0;
2404     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2405     lf.lfQuality = 0;
2406     if (cf.dwEffects & CFE_STRIKEOUT)
2407         lf.lfStrikeOut = TRUE;
2408     if (cf.dwEffects & CFE_UNDERLINE)
2409         lf.lfUnderline = TRUE;
2410     if (cf.dwEffects & CFE_BOLD)
2411         lf.lfWeight = FW_BOLD;
2412
2413     wxFont font = wxCreateFontFromLogFont(& lf);
2414     if (font.Ok())
2415     {
2416         style.SetFont(font);
2417     }
2418     style.SetTextColour(wxColour(cf.crTextColor));
2419
2420 #if wxUSE_RICHEDIT2
2421     if ( m_verRichEdit != 1 )
2422     {
2423         // cf.dwMask |= CFM_BACKCOLOR;
2424         style.SetBackgroundColour(wxColour(cf.crBackColor));
2425     }
2426 #endif // wxUSE_RICHEDIT2
2427
2428     // now get the paragraph formatting
2429     PARAFORMAT2 pf;
2430     wxZeroMemory(pf);
2431     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2432     // PARAFORMAT in that case
2433 #if wxUSE_RICHEDIT2
2434     if ( m_verRichEdit == 1 )
2435     {
2436         // this is the only thing the control is going to grok
2437         pf.cbSize = sizeof(PARAFORMAT);
2438     }
2439     else
2440 #endif
2441     {
2442         // PARAFORMAT or PARAFORMAT2
2443         pf.cbSize = sizeof(pf);
2444     }
2445
2446     // do format the selection
2447     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2448
2449     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0) );
2450     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2451
2452     if (pf.wAlignment == PFA_CENTER)
2453         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2454     else if (pf.wAlignment == PFA_RIGHT)
2455         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2456     else if (pf.wAlignment == PFA_JUSTIFY)
2457         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2458     else
2459         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2460
2461     wxArrayInt tabStops;
2462     size_t i;
2463     for (i = 0; i < (size_t) pf.cTabCount; i++)
2464     {
2465         tabStops[i] = (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) ;
2466     }
2467
2468     if ( changeSel )
2469     {
2470         // restore the original selection
2471         DoSetSelection(startOld, endOld, FALSE);
2472     }
2473
2474     return TRUE;
2475 }
2476
2477 #endif
2478
2479 // ----------------------------------------------------------------------------
2480 // wxRichEditModule
2481 // ----------------------------------------------------------------------------
2482
2483 bool wxRichEditModule::OnInit()
2484 {
2485     // don't do anything - we will load it when needed
2486     return TRUE;
2487 }
2488
2489 void wxRichEditModule::OnExit()
2490 {
2491     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2492     {
2493         if ( ms_hRichEdit[i] )
2494         {
2495             ::FreeLibrary(ms_hRichEdit[i]);
2496             ms_hRichEdit[i] = NULL;
2497         }
2498     }
2499 }
2500
2501 /* static */
2502 bool wxRichEditModule::Load(int version)
2503 {
2504     // we don't support loading richedit 3.0 as I don't know how to distinguish
2505     // it from 2.0 anyhow
2506     wxCHECK_MSG( version == 1 || version == 2, FALSE,
2507                  _T("incorrect richedit control version requested") );
2508
2509     // make it the index in the array
2510     version--;
2511
2512     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2513     {
2514         // we had already tried to load it and failed
2515         return FALSE;
2516     }
2517
2518     if ( ms_hRichEdit[version] )
2519     {
2520         // we've already got this one
2521         return TRUE;
2522     }
2523
2524     wxString dllname = version ? _T("riched20") : _T("riched32");
2525     dllname += _T(".dll");
2526
2527     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2528
2529     if ( !ms_hRichEdit[version] )
2530     {
2531         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2532
2533         ms_hRichEdit[version] = (HINSTANCE)-1;
2534
2535         return FALSE;
2536     }
2537
2538     return TRUE;
2539 }
2540
2541 #endif // wxUSE_RICHEDIT
2542
2543 #endif // wxUSE_TEXTCTRL