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 functions
  78 // ----------------------------------------------------------------------------
  79
  80 #if wxUSE_RICHEDIT
  81
  82 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb);
  83
  84 #endif // wxUSE_RICHEDIT
  85
  86 // ----------------------------------------------------------------------------
  87 // private classes
  88 // ----------------------------------------------------------------------------
  89
  90 #if wxUSE_RICHEDIT
  91
  92 // this module initializes RichEdit DLL(s) if needed
  93 class wxRichEditModule : public wxModule
  94 {
  95 public:
  96     virtual bool OnInit();
  97     virtual void OnExit();
  98
  99     // load the richedit DLL of at least of required version
 100     static bool Load(int version = 1);
 101
 102 private:
 103     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
 104     static HINSTANCE ms_hRichEdit[2];
 105
 106     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 107 };
 108
 109 HINSTANCE wxRichEditModule::ms_hRichEdit[2] = { NULL, NULL };
 110
 111 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 112
 113 #endif // wxUSE_RICHEDIT
 114
 115 // ----------------------------------------------------------------------------
 116 // event tables and other macros
 117 // ----------------------------------------------------------------------------
 118
 119 #if wxUSE_EXTENDED_RTTI
 120 WX_DEFINE_FLAGS( wxTextCtrlStyle )
 121
 122 wxBEGIN_FLAGS( wxTextCtrlStyle )
 123     // new style border flags, we put them first to
 124     // use them for streaming out
 125     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
 126     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
 127     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
 128     wxFLAGS_MEMBER(wxBORDER_RAISED)
 129     wxFLAGS_MEMBER(wxBORDER_STATIC)
 130     wxFLAGS_MEMBER(wxBORDER_NONE)
 131
 132     // old style border flags
 133     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
 134     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
 135     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
 136     wxFLAGS_MEMBER(wxRAISED_BORDER)
 137     wxFLAGS_MEMBER(wxSTATIC_BORDER)
 138     wxFLAGS_MEMBER(wxNO_BORDER)
 139
 140     // standard window styles
 141     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
 142     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
 143     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
 144     wxFLAGS_MEMBER(wxWANTS_CHARS)
 145     wxFLAGS_MEMBER(wxNO_FULL_REPAINT_ON_RESIZE)
 146     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
 147     wxFLAGS_MEMBER(wxVSCROLL)
 148     wxFLAGS_MEMBER(wxHSCROLL)
 149
 150     wxFLAGS_MEMBER(wxTE_PROCESS_ENTER)
 151     wxFLAGS_MEMBER(wxTE_PROCESS_TAB)
 152     wxFLAGS_MEMBER(wxTE_MULTILINE)
 153     wxFLAGS_MEMBER(wxTE_PASSWORD)
 154     wxFLAGS_MEMBER(wxTE_READONLY)
 155     wxFLAGS_MEMBER(wxHSCROLL)
 156     wxFLAGS_MEMBER(wxTE_RICH)
 157     wxFLAGS_MEMBER(wxTE_RICH2)
 158     wxFLAGS_MEMBER(wxTE_AUTO_URL)
 159     wxFLAGS_MEMBER(wxTE_NOHIDESEL)
 160     wxFLAGS_MEMBER(wxTE_LEFT)
 161     wxFLAGS_MEMBER(wxTE_CENTRE)
 162     wxFLAGS_MEMBER(wxTE_RIGHT)
 163     wxFLAGS_MEMBER(wxTE_DONTWRAP)
 164     wxFLAGS_MEMBER(wxTE_LINEWRAP)
 165     wxFLAGS_MEMBER(wxTE_WORDWRAP)
 166
 167 wxEND_FLAGS( wxTextCtrlStyle )
 168
 169 IMPLEMENT_DYNAMIC_CLASS_XTI(wxTextCtrl, wxControl,"wx/textctrl.h")
 170
 171 wxBEGIN_PROPERTIES_TABLE(wxTextCtrl)
 172     wxEVENT_PROPERTY( TextUpdated , wxEVT_COMMAND_TEXT_UPDATED , wxCommandEvent )
 173     wxEVENT_PROPERTY( TextEnter , wxEVT_COMMAND_TEXT_ENTER , wxCommandEvent )
 174
 175     wxPROPERTY( Font , wxFont , SetFont , GetFont  ,, 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 176         wxPROPERTY( Value , wxString , SetValue, GetValue, wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 177     wxPROPERTY_FLAGS( WindowStyle , wxTextCtrlStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 178 wxEND_PROPERTIES_TABLE()
 179
 180 wxBEGIN_HANDLERS_TABLE(wxTextCtrl)
 181 wxEND_HANDLERS_TABLE()
 182
 183 wxCONSTRUCTOR_6( wxTextCtrl , wxWindow* , Parent , wxWindowID , Id , wxString , Value , wxPoint , Position , wxSize , Size , long , WindowStyle)
 184 #else
 185 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 186 #endif
 187
 188
 189 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 190     EVT_CHAR(wxTextCtrl::OnChar)
 191     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 192
 193 #if wxUSE_RICHEDIT
 194     EVT_RIGHT_UP(wxTextCtrl::OnRightClick)
 195 #endif
 196
 197     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 198     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 199     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 200     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 201     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 202     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 203     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 204
 205     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 206     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 207     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 208     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 209     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 210     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 211     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 212 #ifdef __WIN16__
 213     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 214 #endif
 215
 216     EVT_SET_FOCUS(wxTextCtrl::OnSetFocus)
 217 END_EVENT_TABLE()
 218
 219 // ============================================================================
 220 // implementation
 221 // ============================================================================
 222
 223 // ----------------------------------------------------------------------------
 224 // creation
 225 // ----------------------------------------------------------------------------
 226
 227 void wxTextCtrl::Init()
 228 {
 229 #if wxUSE_RICHEDIT
 230     m_verRichEdit = 0;
 231 #endif // wxUSE_RICHEDIT
 232
 233     m_privateContextMenu = NULL;
 234     m_suppressNextUpdate = FALSE;
 235     m_isNativeCaretShown = true;
 236 }
 237
 238 wxTextCtrl::~wxTextCtrl()
 239 {
 240     if (m_privateContextMenu)
 241     {
 242         delete m_privateContextMenu;
 243         m_privateContextMenu = NULL;
 244     }
 245 }
 246
 247 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 248                         const wxString& value,
 249                         const wxPoint& pos,
 250                         const wxSize& size,
 251                         long style,
 252                         const wxValidator& validator,
 253                         const wxString& name)
 254 {
 255     // base initialization
 256     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 257         return FALSE;
 258
 259     if ( parent )
 260         parent->AddChild(this);
 261
 262     // translate wxWin style flags to MSW ones
 263     WXDWORD msStyle = MSWGetCreateWindowFlags();
 264
 265     // do create the control - either an EDIT or RICHEDIT
 266     wxString windowClass = wxT("EDIT");
 267
 268 #if wxUSE_RICHEDIT
 269     if ( m_windowStyle & wxTE_AUTO_URL )
 270     {
 271         // automatic URL detection only works in RichEdit 2.0+
 272         m_windowStyle |= wxTE_RICH2;
 273     }
 274
 275     if ( m_windowStyle & wxTE_RICH2 )
 276     {
 277         // using richedit 2.0 implies using wxTE_RICH
 278         m_windowStyle |= wxTE_RICH;
 279     }
 280
 281     // we need to load the richedit DLL before creating the rich edit control
 282     if ( m_windowStyle & wxTE_RICH )
 283     {
 284         static bool s_errorGiven = FALSE;// MT-FIXME
 285
 286         // Which version do we need? Use 1.0 by default because it is much more
 287         // like the the standard EDIT or 2.0 if explicitly requested, but use
 288         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 289         //
 290         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 291         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 292         //       should use 3.0 if available as it is the best of both worlds -
 293         //       but as I can't test it right now I don't do it (VZ)
 294 #if wxUSE_UNICODE
 295         const int verRichEdit = 2;
 296 #else // !wxUSE_UNICODE
 297         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 298 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 299
 300         // only give the error msg once if the DLL can't be loaded
 301         if ( !s_errorGiven )
 302         {
 303             // try to load the RichEdit DLL (will do nothing if already done)
 304             if ( !wxRichEditModule::Load(verRichEdit) )
 305             {
 306 #if !wxUSE_UNICODE
 307                 // try another version?
 308                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 309
 310                 if ( !wxRichEditModule::Load(verRichEdit) )
 311 #endif // wxUSE_UNICODE
 312                 {
 313                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 314
 315                     s_errorGiven = TRUE;
 316                 }
 317             }
 318         }
 319
 320         // have we managed to load any richedit version?
 321         if ( !s_errorGiven )
 322         {
 323             m_verRichEdit = verRichEdit;
 324             if ( m_verRichEdit == 1 )
 325             {
 326                 windowClass = wxT("RICHEDIT");
 327             }
 328             else
 329             {
 330 #ifndef RICHEDIT_CLASS
 331                 wxString RICHEDIT_CLASS;
 332                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 333 #if wxUSE_UNICODE
 334                 RICHEDIT_CLASS += _T('W');
 335 #else // ANSI
 336                 RICHEDIT_CLASS += _T('A');
 337 #endif // Unicode/ANSI
 338 #endif // !RICHEDIT_CLASS
 339
 340                 windowClass = RICHEDIT_CLASS;
 341             }
 342         }
 343     }
 344 #endif // wxUSE_RICHEDIT
 345
 346     // we need to turn '\n's into "\r\n"s for the multiline controls
 347     wxString valueWin;
 348     if ( m_windowStyle & wxTE_MULTILINE )
 349     {
 350         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 351     }
 352     else // single line
 353     {
 354         valueWin = value;
 355     }
 356
 357     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 358         return FALSE;
 359
 360     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 361
 362 #if wxUSE_RICHEDIT
 363     if ( IsRich() )
 364     {
 365         // enable the events we're interested in: we want to get EN_CHANGE as
 366         // for the normal controls
 367         LPARAM mask = ENM_CHANGE;
 368
 369         if ( GetRichVersion() == 1 )
 370         {
 371             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 372             // explained in its handler
 373            mask |= ENM_MOUSEEVENTS;
 374         }
 375         else if ( m_windowStyle & wxTE_AUTO_URL )
 376         {
 377             mask |= ENM_LINK;
 378
 379             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 380         }
 381
 382         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 383     }
 384 #endif // wxUSE_RICHEDIT
 385
 386     return TRUE;
 387 }
 388
 389 // Make sure the window style (etc.) reflects the HWND style (roughly)
 390 void wxTextCtrl::AdoptAttributesFromHWND()
 391 {
 392     wxWindow::AdoptAttributesFromHWND();
 393
 394     HWND hWnd = GetHwnd();
 395     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 396
 397     // retrieve the style to see whether this is an edit or richedit ctrl
 398 #if wxUSE_RICHEDIT
 399     wxString classname = wxGetWindowClass(GetHWND());
 400
 401     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 402     {
 403         m_verRichEdit = 0;
 404     }
 405     else // rich edit?
 406     {
 407         wxChar c;
 408         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 409         {
 410             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 411
 412             m_verRichEdit = 0;
 413         }
 414     }
 415 #endif // wxUSE_RICHEDIT
 416
 417     if (style & ES_MULTILINE)
 418         m_windowStyle |= wxTE_MULTILINE;
 419     if (style & ES_PASSWORD)
 420         m_windowStyle |= wxTE_PASSWORD;
 421     if (style & ES_READONLY)
 422         m_windowStyle |= wxTE_READONLY;
 423     if (style & ES_WANTRETURN)
 424         m_windowStyle |= wxTE_PROCESS_ENTER;
 425     if (style & ES_CENTER)
 426         m_windowStyle |= wxTE_CENTRE;
 427     if (style & ES_RIGHT)
 428         m_windowStyle |= wxTE_RIGHT;
 429 }
 430
 431 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 432 {
 433     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 434
 435     // styles which we alaways add by default
 436     if ( style & wxTE_MULTILINE )
 437     {
 438         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 439                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 440
 441         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 442         if ( !(style & wxTE_NO_VSCROLL) )
 443         {
 444             // always adjust the vertical scrollbar automatically if we have it
 445             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 446
 447 #if wxUSE_RICHEDIT
 448             // we have to use this style for the rich edit controls because
 449             // without it the vertical scrollbar never appears at all in
 450             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 451             if ( style & wxTE_RICH2 )
 452             {
 453                 msStyle |= ES_DISABLENOSCROLL;
 454             }
 455 #endif // wxUSE_RICHEDIT
 456         }
 457
 458         style |= wxTE_PROCESS_ENTER;
 459     }
 460     else // !multiline
 461     {
 462         // there is really no reason to not have this style for single line
 463         // text controls
 464         msStyle |= ES_AUTOHSCROLL;
 465     }
 466
 467     // note that wxTE_DONTWRAP is the same as wxHSCROLL so if we have a horz
 468     // scrollbar, there is no wrapping -- which makes sense
 469     if ( style & wxTE_DONTWRAP )
 470     {
 471         // automatically scroll the control horizontally as necessary
 472         msStyle |= WS_HSCROLL;
 473     }
 474
 475     if ( style & wxTE_READONLY )
 476         msStyle |= ES_READONLY;
 477
 478     if ( style & wxTE_PASSWORD )
 479         msStyle |= ES_PASSWORD;
 480
 481     if ( style & wxTE_NOHIDESEL )
 482         msStyle |= ES_NOHIDESEL;
 483
 484     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 485     if ( style & wxTE_CENTRE )
 486         msStyle |= ES_CENTER;
 487     else if ( style & wxTE_RIGHT )
 488         msStyle |= ES_RIGHT;
 489     else
 490         msStyle |= ES_LEFT; // ES_LEFT is 0 as well but for consistency...
 491
 492     return msStyle;
 493 }
 494
 495 void wxTextCtrl::SetWindowStyleFlag(long style)
 496 {
 497 #if wxUSE_RICHEDIT
 498     // we have to deal with some styles separately because they can't be
 499     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 500     // using richedit-specific EM_SETOPTIONS
 501     if ( IsRich() &&
 502             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 503     {
 504         bool set = (style & wxTE_NOHIDESEL) != 0;
 505
 506         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 507                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 508     }
 509 #endif // wxUSE_RICHEDIT
 510
 511     wxControl::SetWindowStyleFlag(style);
 512 }
 513
 514 // ----------------------------------------------------------------------------
 515 // set/get the controls text
 516 // ----------------------------------------------------------------------------
 517
 518 wxString wxTextCtrl::GetValue() const
 519 {
 520     // range 0..-1 is special for GetRange() and means to retrieve all text
 521     return GetRange(0, -1);
 522 }
 523
 524 wxString wxTextCtrl::GetRange(long from, long to) const
 525 {
 526     wxString str;
 527
 528     if ( from >= to && to != -1 )
 529     {
 530         // nothing to retrieve
 531         return str;
 532     }
 533
 534 #if wxUSE_RICHEDIT
 535     if ( IsRich() )
 536     {
 537         int len = GetWindowTextLength(GetHwnd());
 538         if ( len > from )
 539         {
 540             {
 541                 // alloc one extra WORD as needed by the control
 542                 wxStringBuffer tmp(str, ++len);
 543                 wxChar *p = tmp;
 544
 545                 TEXTRANGE textRange;
 546                 textRange.chrg.cpMin = from;
 547                 textRange.chrg.cpMax = to == -1 ? len : to;
 548                 textRange.lpstrText = p;
 549
 550                 (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE,
 551                                   0, (LPARAM)&textRange);
 552
 553                 if ( m_verRichEdit > 1 )
 554                 {
 555                     // RichEdit 2.0 uses just CR ('\r') for the
 556                     // newlines which is neither Unix nor Windows
 557                     // style - convert it to something reasonable
 558                     for ( ; *p; p++ )
 559                     {
 560                         if ( *p == _T('\r') )
 561                             *p = _T('\n');
 562                     }
 563                 }
 564             }
 565
 566             if ( m_verRichEdit == 1 )
 567             {
 568                 // convert to the canonical form - see comment below
 569                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 570             }
 571         }
 572         //else: no text at all, leave the string empty
 573     }
 574     else
 575 #endif // wxUSE_RICHEDIT
 576     {
 577         // retrieve all text
 578         str = wxGetWindowText(GetHWND());
 579
 580         // need only a range?
 581         if ( from < to )
 582         {
 583             str = str.Mid(from, to - from);
 584         }
 585
 586         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 587         // canonical one (same one as above) for consistency with the other kinds
 588         // of controls and, more importantly, with the other ports
 589         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 590     }
 591
 592     return str;
 593 }
 594
 595 void wxTextCtrl::SetValue(const wxString& value)
 596 {
 597     // if the text is long enough, it's faster to just set it instead of first
 598     // comparing it with the old one (chances are that it will be different
 599     // anyhow, this comparison is there to avoid flicker for small single-line
 600     // edit controls mostly)
 601     if ( (value.length() > 0x400) || (value != GetValue()) )
 602     {
 603         DoWriteText(value, FALSE /* not selection only */);
 604     }
 605     else // same text
 606     {
 607         // still send an event for consistency
 608         SendUpdateEvent();
 609     }
 610
 611     // we should reset the modified flag even if the value didn't really change
 612
 613     // mark the control as being not dirty - we changed its text, not the
 614     // user
 615     DiscardEdits();
 616
 617     // for compatibility, don't move the cursor when doing SetValue()
 618     SetInsertionPoint(0);
 619 }
 620
 621 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 622
 623 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 624 {
 625     *pcb = 0;
 626
 627     wchar_t *wbuf = (wchar_t *)buf;
 628     const wchar_t *wpc = *(const wchar_t **)dwCookie;
 629     while ( cb && *wpc )
 630     {
 631         *wbuf++ = *wpc++;
 632
 633         cb -= sizeof(wchar_t);
 634         (*pcb) += sizeof(wchar_t);
 635     }
 636
 637     *(const wchar_t **)dwCookie = wpc;
 638
 639     return 0;
 640 }
 641
 642 // from utils.cpp
 643 extern WXDLLIMPEXP_BASE long wxEncodingToCodepage(wxFontEncoding encoding);
 644
 645 #if wxUSE_UNICODE_MSLU
 646 bool wxTextCtrl::StreamIn(const wxString& value,
 647                           wxFontEncoding WXUNUSED(encoding),
 648                           bool selectionOnly)
 649 {
 650     const wchar_t *wpc = value.c_str();
 651 #else // !wxUSE_UNICODE_MSLU
 652 bool wxTextCtrl::StreamIn(const wxString& value,
 653                           wxFontEncoding encoding,
 654                           bool selectionOnly)
 655 {
 656     // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
 657     // text in the non default charset -- otherwise it thinks it knows better
 658     // than we do and always shows it in the default one
 659
 660     // first get the Windows code page for this encoding
 661     long codepage = wxEncodingToCodepage(encoding);
 662     if ( codepage == -1 )
 663     {
 664         // unknown encoding
 665         return FALSE;
 666     }
 667
 668     // next translate to Unicode using this code page
 669     int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
 670
 671 #if wxUSE_WCHAR_T
 672     wxWCharBuffer wchBuf(len);
 673 #else
 674     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 675 #endif
 676
 677     if ( !::MultiByteToWideChar(codepage, 0, value, -1,
 678                                 (wchar_t *)(const wchar_t *)wchBuf, len) )
 679     {
 680         wxLogLastError(_T("MultiByteToWideChar"));
 681     }
 682
 683     // finally, stream it in the control
 684     const wchar_t *wpc = wchBuf;
 685 #endif // wxUSE_UNICODE_MSLU
 686
 687     EDITSTREAM eds;
 688     wxZeroMemory(eds);
 689     eds.dwCookie = (DWORD)&wpc;
 690     // the cast below is needed for broken (very) old mingw32 headers
 691     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 692
 693     // we're going to receive 2 EN_CHANGE notifications if we got any selection
 694     // (same problem as in DoWriteText())
 695     if ( selectionOnly && HasSelection() )
 696     {
 697         // so suppress one of them
 698         m_suppressNextUpdate = TRUE;
 699     }
 700
 701     ::SendMessage(GetHwnd(), EM_STREAMIN,
 702                   SF_TEXT |
 703                   SF_UNICODE |
 704                   (selectionOnly ? SFF_SELECTION : 0),
 705                   (LPARAM)&eds);
 706
 707     if ( eds.dwError )
 708     {
 709         wxLogLastError(_T("EM_STREAMIN"));
 710     }
 711
 712 #if !wxUSE_WCHAR_T
 713     free(wchBuf);
 714 #endif // !wxUSE_WCHAR_T
 715
 716     return TRUE;
 717 }
 718
 719 #endif // wxUSE_RICHEDIT
 720
 721 void wxTextCtrl::WriteText(const wxString& value)
 722 {
 723     DoWriteText(value);
 724 }
 725
 726 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 727 {
 728     wxString valueDos;
 729     if ( m_windowStyle & wxTE_MULTILINE )
 730         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 731     else
 732         valueDos = value;
 733
 734 #if wxUSE_RICHEDIT
 735     // there are several complications with the rich edit controls here
 736     bool done = FALSE;
 737     if ( IsRich() )
 738     {
 739         // first, ensure that the new text will be in the default style
 740         if ( !m_defaultStyle.IsDefault() )
 741         {
 742             long start, end;
 743             GetSelection(&start, &end);
 744             SetStyle(start, end, m_defaultStyle);
 745         }
 746
 747 #if wxUSE_UNICODE_MSLU
 748         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 749         // but EM_STREAMIN works
 750         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 751         {
 752            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 753         }
 754 #endif // wxUSE_UNICODE_MSLU
 755
 756 #if !wxUSE_UNICODE
 757         // next check if the text we're inserting must be shown in a non
 758         // default charset -- this only works for RichEdit > 1.0
 759         if ( GetRichVersion() > 1 )
 760         {
 761             wxFont font = m_defaultStyle.GetFont();
 762             if ( !font.Ok() )
 763                 font = GetFont();
 764
 765             if ( font.Ok() )
 766             {
 767                wxFontEncoding encoding = font.GetEncoding();
 768                if ( encoding != wxFONTENCODING_SYSTEM )
 769                {
 770                    done = StreamIn(valueDos, encoding, selectionOnly);
 771                }
 772             }
 773         }
 774 #endif // !wxUSE_UNICODE
 775     }
 776
 777     if ( !done )
 778 #endif // wxUSE_RICHEDIT
 779     {
 780         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
 781         // call below which is confusing for the client code and so should be
 782         // avoided
 783         //
 784         // these cases are: (a) plain EDIT controls if EM_REPLACESEL is used
 785         // and there is a non empty selection currently and (b) rich text
 786         // controls in any case
 787         if (
 788 #if wxUSE_RICHEDIT
 789             IsRich() ||
 790 #endif // wxUSE_RICHEDIT
 791             (selectionOnly && HasSelection()) )
 792         {
 793             m_suppressNextUpdate = TRUE;
 794         }
 795
 796         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 797                       0, (LPARAM)valueDos.c_str());
 798
 799         // OTOH, non rich text controls don't generate any events at all when
 800         // we use WM_SETTEXT -- have to emulate them here
 801         if ( !selectionOnly
 802 #if wxUSE_RICHEDIT
 803                 && !IsRich()
 804 #endif // wxUSE_RICHEDIT
 805            )
 806         {
 807             // Windows already sends an update event for single-line
 808             // controls.
 809             if ( m_windowStyle & wxTE_MULTILINE )
 810                 SendUpdateEvent();
 811         }
 812     }
 813
 814     AdjustSpaceLimit();
 815 }
 816
 817 void wxTextCtrl::AppendText(const wxString& text)
 818 {
 819     SetInsertionPointEnd();
 820
 821     WriteText(text);
 822
 823 #if wxUSE_RICHEDIT
 824     if ( IsMultiLine() && GetRichVersion() > 1 )
 825     {
 826         // setting the caret to the end and showing it simply doesn't work for
 827         // RichEdit 2.0 -- force it to still do what we want
 828         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
 829     }
 830 #endif // wxUSE_RICHEDIT
 831 }
 832
 833 void wxTextCtrl::Clear()
 834 {
 835     ::SetWindowText(GetHwnd(), wxEmptyString);
 836
 837 #if wxUSE_RICHEDIT
 838     if ( !IsRich() )
 839 #endif // wxUSE_RICHEDIT
 840     {
 841         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 842         // but the normal ones don't -- make Clear() behaviour consistent by
 843         // always sending this event
 844
 845         // Windows already sends an update event for single-line
 846         // controls.
 847         if ( m_windowStyle & wxTE_MULTILINE )
 848             SendUpdateEvent();
 849     }
 850 }
 851
 852 #ifdef __WIN32__
 853
 854 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 855 {
 856     SetFocus();
 857
 858     size_t lenOld = GetValue().length();
 859
 860     wxUint32 code = event.GetRawKeyCode();
 861     ::keybd_event(code, 0, 0 /* key press */, 0);
 862     ::keybd_event(code, 0, KEYEVENTF_KEYUP, 0);
 863
 864     // assume that any alphanumeric key changes the total number of characters
 865     // in the control - this should work in 99% of cases
 866     return GetValue().length() != lenOld;
 867 }
 868
 869 #endif // __WIN32__
 870
 871 // ----------------------------------------------------------------------------
 872 // Clipboard operations
 873 // ----------------------------------------------------------------------------
 874
 875 void wxTextCtrl::Copy()
 876 {
 877     if (CanCopy())
 878     {
 879         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
 880     }
 881 }
 882
 883 void wxTextCtrl::Cut()
 884 {
 885     if (CanCut())
 886     {
 887         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
 888     }
 889 }
 890
 891 void wxTextCtrl::Paste()
 892 {
 893     if (CanPaste())
 894     {
 895         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
 896     }
 897 }
 898
 899 bool wxTextCtrl::HasSelection() const
 900 {
 901     long from, to;
 902     GetSelection(&from, &to);
 903     return from != to;
 904 }
 905
 906 bool wxTextCtrl::CanCopy() const
 907 {
 908     // Can copy if there's a selection
 909     return HasSelection();
 910 }
 911
 912 bool wxTextCtrl::CanCut() const
 913 {
 914     return CanCopy() && IsEditable();
 915 }
 916
 917 bool wxTextCtrl::CanPaste() const
 918 {
 919     if ( !IsEditable() )
 920         return FALSE;
 921
 922 #if wxUSE_RICHEDIT
 923     if ( IsRich() )
 924     {
 925         UINT cf = 0; // 0 == any format
 926
 927         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 928     }
 929 #endif // wxUSE_RICHEDIT
 930
 931     // Standard edit control: check for straight text on clipboard
 932     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 933         return FALSE;
 934
 935     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 936     ::CloseClipboard();
 937
 938     return isTextAvailable;
 939 }
 940
 941 // ----------------------------------------------------------------------------
 942 // Accessors
 943 // ----------------------------------------------------------------------------
 944
 945 void wxTextCtrl::SetEditable(bool editable)
 946 {
 947     HWND hWnd = GetHwnd();
 948     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 949 }
 950
 951 void wxTextCtrl::SetInsertionPoint(long pos)
 952 {
 953     DoSetSelection(pos, pos);
 954 }
 955
 956 void wxTextCtrl::SetInsertionPointEnd()
 957 {
 958     // we must not do anything if the caret is already there because calling
 959     // SetInsertionPoint() thaws the controls if Freeze() had been called even
 960     // if it doesn't actually move the caret anywhere and so the simple fact of
 961     // doing it results in horrible flicker when appending big amounts of text
 962     // to the control in a few chunks (see DoAddText() test in the text sample)
 963     if ( GetInsertionPoint() == GetLastPosition() )
 964         return;
 965
 966     long pos;
 967
 968 #if wxUSE_RICHEDIT
 969     if ( m_verRichEdit == 1 )
 970     {
 971         // we don't have to waste time calling GetLastPosition() in this case
 972         pos = -1;
 973     }
 974     else // !RichEdit 1.0
 975 #endif // wxUSE_RICHEDIT
 976     {
 977         pos = GetLastPosition();
 978     }
 979
 980     SetInsertionPoint(pos);
 981 }
 982
 983 long wxTextCtrl::GetInsertionPoint() const
 984 {
 985 #if wxUSE_RICHEDIT
 986     if ( IsRich() )
 987     {
 988         CHARRANGE range;
 989         range.cpMin = 0;
 990         range.cpMax = 0;
 991         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 992         return range.cpMin;
 993     }
 994 #endif // wxUSE_RICHEDIT
 995
 996     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 997     return Pos & 0xFFFF;
 998 }
 999
1000 long wxTextCtrl::GetLastPosition() const
1001 {
1002     int numLines = GetNumberOfLines();
1003     long posStartLastLine = XYToPosition(0, numLines - 1);
1004
1005     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
1006
1007     return posStartLastLine + lenLastLine;
1008 }
1009
1010 // If the return values from and to are the same, there is no
1011 // selection.
1012 void wxTextCtrl::GetSelection(long* from, long* to) const
1013 {
1014 #if wxUSE_RICHEDIT
1015     if ( IsRich() )
1016     {
1017         CHARRANGE charRange;
1018         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
1019
1020         *from = charRange.cpMin;
1021         *to = charRange.cpMax;
1022     }
1023     else
1024 #endif // !wxUSE_RICHEDIT
1025     {
1026         DWORD dwStart, dwEnd;
1027         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
1028
1029         *from = dwStart;
1030         *to = dwEnd;
1031     }
1032 }
1033
1034 bool wxTextCtrl::IsEditable() const
1035 {
1036     // strangely enough, we may be called before the control is created: our
1037     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
1038     // us
1039     if ( !m_hWnd )
1040         return TRUE;
1041
1042     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1043
1044     return (style & ES_READONLY) == 0;
1045 }
1046
1047 // ----------------------------------------------------------------------------
1048 // selection
1049 // ----------------------------------------------------------------------------
1050
1051 void wxTextCtrl::SetSelection(long from, long to)
1052 {
1053     // if from and to are both -1, it means (in wxWindows) that all text should
1054     // be selected - translate into Windows convention
1055     if ( (from == -1) && (to == -1) )
1056     {
1057         from = 0;
1058         to = -1;
1059     }
1060
1061     DoSetSelection(from, to);
1062 }
1063
1064 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
1065 {
1066     HWND hWnd = GetHwnd();
1067
1068 #ifdef __WIN32__
1069 #if wxUSE_RICHEDIT
1070     if ( IsRich() )
1071     {
1072         CHARRANGE range;
1073         range.cpMin = from;
1074         range.cpMax = to;
1075         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
1076     }
1077     else
1078 #endif // wxUSE_RICHEDIT
1079     {
1080         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
1081     }
1082
1083     if ( scrollCaret )
1084     {
1085 #if wxUSE_RICHEDIT
1086         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1087         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1088         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1089         // option is set (but it does work ok in richedit 1.0 mode...)
1090         //
1091         // so to make it work we either need to give focus to it here which
1092         // will probably create many problems (dummy focus events; window
1093         // containing the text control being brought to foreground
1094         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1095         // create other problems too -- and in fact it does because if we turn
1096         // on/off this style while appending the text to the control, the
1097         // vertical scrollbar never appears in it even if we append tons of
1098         // text and to work around this the only solution I found was to use
1099         // ES_DISABLENOSCROLL
1100         //
1101         // this is very ugly but I don't see any other way to make this work
1102         if ( GetRichVersion() > 1 )
1103         {
1104             if ( !HasFlag(wxTE_NOHIDESEL) )
1105             {
1106                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1107                               ECOOP_OR, ECO_NOHIDESEL);
1108             }
1109             //else: everything is already ok
1110         }
1111 #endif // wxUSE_RICHEDIT
1112
1113         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1114
1115 #if wxUSE_RICHEDIT
1116         // restore ECO_NOHIDESEL if we changed it
1117         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1118         {
1119             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1120                           ECOOP_AND, ~ECO_NOHIDESEL);
1121         }
1122 #endif // wxUSE_RICHEDIT
1123     }
1124 #else // Win16
1125     // WPARAM is 0: selection is scrolled into view
1126     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
1127 #endif // Win32/16
1128 }
1129
1130 // ----------------------------------------------------------------------------
1131 // Editing
1132 // ----------------------------------------------------------------------------
1133
1134 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1135 {
1136     // Set selection and remove it
1137     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
1138
1139     SendMessage(GetHwnd(), EM_REPLACESEL,
1140 #ifdef __WIN32__
1141                 TRUE,
1142 #else
1143                 FALSE,
1144 #endif
1145                 (LPARAM)value.c_str());
1146 }
1147
1148 void wxTextCtrl::Remove(long from, long to)
1149 {
1150     Replace(from, to, wxEmptyString);
1151 }
1152
1153 bool wxTextCtrl::LoadFile(const wxString& file)
1154 {
1155     if ( wxTextCtrlBase::LoadFile(file) )
1156     {
1157         // update the size limit if needed
1158         AdjustSpaceLimit();
1159
1160         return TRUE;
1161     }
1162
1163     return FALSE;
1164 }
1165
1166 bool wxTextCtrl::IsModified() const
1167 {
1168     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1169 }
1170
1171 // Makes 'unmodified'
1172 void wxTextCtrl::DiscardEdits()
1173 {
1174     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1175 }
1176
1177 int wxTextCtrl::GetNumberOfLines() const
1178 {
1179     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1180 }
1181
1182 long wxTextCtrl::XYToPosition(long x, long y) const
1183 {
1184     // This gets the char index for the _beginning_ of this line
1185     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1186
1187     return charIndex + x;
1188 }
1189
1190 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1191 {
1192     HWND hWnd = GetHwnd();
1193
1194     // This gets the line number containing the character
1195     long lineNo;
1196 #if wxUSE_RICHEDIT
1197     if ( IsRich() )
1198     {
1199         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1200     }
1201     else
1202 #endif // wxUSE_RICHEDIT
1203     {
1204         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1205     }
1206
1207     if ( lineNo == -1 )
1208     {
1209         // no such line
1210         return FALSE;
1211     }
1212
1213     // This gets the char index for the _beginning_ of this line
1214     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1215     if ( charIndex == -1 )
1216     {
1217         return FALSE;
1218     }
1219
1220     // The X position must therefore be the different between pos and charIndex
1221     if ( x )
1222         *x = pos - charIndex;
1223     if ( y )
1224         *y = lineNo;
1225
1226     return TRUE;
1227 }
1228
1229 void wxTextCtrl::ShowPosition(long pos)
1230 {
1231     HWND hWnd = GetHwnd();
1232
1233     // To scroll to a position, we pass the number of lines and characters
1234     // to scroll *by*. This means that we need to:
1235     // (1) Find the line position of the current line.
1236     // (2) Find the line position of pos.
1237     // (3) Scroll by (pos - current).
1238     // For now, ignore the horizontal scrolling.
1239
1240     // Is this where scrolling is relative to - the line containing the caret?
1241     // Or is the first visible line??? Try first visible line.
1242 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1243
1244     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1245
1246     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1247
1248     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1249
1250     if (linesToScroll != 0)
1251       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1252 }
1253
1254 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1255 {
1256     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1257 }
1258
1259 int wxTextCtrl::GetLineLength(long lineNo) const
1260 {
1261     long pos = XYToPosition(0, lineNo);
1262
1263     return GetLengthOfLineContainingPos(pos);
1264 }
1265
1266 wxString wxTextCtrl::GetLineText(long lineNo) const
1267 {
1268     size_t len = (size_t)GetLineLength(lineNo) + 1;
1269
1270     // there must be at least enough place for the length WORD in the
1271     // buffer
1272     len += sizeof(WORD);
1273
1274     wxString str;
1275     {
1276         wxStringBufferLength tmp(str, len);
1277         wxChar *buf = tmp;
1278
1279         *(WORD *)buf = (WORD)len;
1280         len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1281
1282 #if wxUSE_RICHEDIT
1283         if ( IsRich() )
1284         {
1285             // remove the '\r' returned by the rich edit control, the user code
1286             // should never see it
1287             if ( buf[len - 2] == _T('\r') && buf[len - 1] == _T('\n') )
1288             {
1289                 buf[len - 2] = _T('\n');
1290                 len--;
1291             }
1292         }
1293 #endif // wxUSE_RICHEDIT
1294
1295         // remove the '\n' at the end, if any (this is how this function is
1296         // supposed to work according to the docs)
1297         if ( buf[len - 1] == _T('\n') )
1298         {
1299             len--;
1300         }
1301
1302         buf[len] = 0;
1303         tmp.SetLength(len);
1304     }
1305
1306     return str;
1307 }
1308
1309 void wxTextCtrl::SetMaxLength(unsigned long len)
1310 {
1311     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1312 }
1313
1314 // ----------------------------------------------------------------------------
1315 // Undo/redo
1316 // ----------------------------------------------------------------------------
1317
1318 void wxTextCtrl::Undo()
1319 {
1320     if (CanUndo())
1321     {
1322         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1323     }
1324 }
1325
1326 void wxTextCtrl::Redo()
1327 {
1328     if (CanRedo())
1329     {
1330         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1331         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1332     }
1333 }
1334
1335 bool wxTextCtrl::CanUndo() const
1336 {
1337     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1338 }
1339
1340 bool wxTextCtrl::CanRedo() const
1341 {
1342     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1343 }
1344
1345 // ----------------------------------------------------------------------------
1346 // caret handling (Windows only)
1347 // ----------------------------------------------------------------------------
1348
1349 bool wxTextCtrl::ShowNativeCaret(bool show)
1350 {
1351     if ( show != m_isNativeCaretShown )
1352     {
1353         if ( !(show ? ::ShowCaret(GetHwnd()) : ::HideCaret(GetHwnd())) )
1354         {
1355             // not an error, may simply indicate that it's not shown/hidden
1356             // yet (i.e. it had been hidden/showh 2 times before)
1357             return false;
1358         }
1359
1360         m_isNativeCaretShown = show;
1361     }
1362
1363     return true;
1364 }
1365
1366 // ----------------------------------------------------------------------------
1367 // implemenation details
1368 // ----------------------------------------------------------------------------
1369
1370 void wxTextCtrl::Command(wxCommandEvent & event)
1371 {
1372     SetValue(event.GetString());
1373     ProcessCommand (event);
1374 }
1375
1376 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1377 {
1378     // By default, load the first file into the text window.
1379     if (event.GetNumberOfFiles() > 0)
1380     {
1381         LoadFile(event.GetFiles()[0]);
1382     }
1383 }
1384
1385 // ----------------------------------------------------------------------------
1386 // kbd input processing
1387 // ----------------------------------------------------------------------------
1388
1389 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1390 {
1391     MSG *msg = (MSG *)pMsg;
1392
1393     // check for our special keys here: if we don't do it and the parent frame
1394     // uses them as accelerators, they wouldn't work at all, so we disable
1395     // usual preprocessing for them
1396     if ( msg->message == WM_KEYDOWN )
1397     {
1398         WORD vkey = (WORD) msg->wParam;
1399         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1400         {
1401             if ( vkey == VK_BACK )
1402                 return FALSE;
1403         }
1404         else // no Alt
1405         {
1406             // we want to process some Ctrl-foo and Shift-bar but no key
1407             // combinations without either Ctrl or Shift nor with both of them
1408             // pressed
1409             const int ctrl = wxIsCtrlDown(),
1410                       shift = wxIsShiftDown();
1411             switch ( ctrl + shift )
1412             {
1413                 default:
1414                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1415                     // fall through
1416
1417                 case 0:
1418                 case 2:
1419                     break;
1420
1421                 case 1:
1422                     // either Ctrl or Shift pressed
1423                     if ( ctrl )
1424                     {
1425                         switch ( vkey )
1426                         {
1427                             case 'C':
1428                             case 'V':
1429                             case 'X':
1430                             case VK_INSERT:
1431                             case VK_DELETE:
1432                             case VK_HOME:
1433                             case VK_END:
1434                                 return FALSE;
1435                         }
1436                     }
1437                     else // Shift is pressed
1438                     {
1439                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1440                             return FALSE;
1441                     }
1442             }
1443         }
1444     }
1445
1446     return wxControl::MSWShouldPreProcessMessage(pMsg);
1447 }
1448
1449 void wxTextCtrl::OnChar(wxKeyEvent& event)
1450 {
1451     switch ( event.GetKeyCode() )
1452     {
1453         case WXK_RETURN:
1454             if ( !(m_windowStyle & wxTE_MULTILINE) )
1455             {
1456                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1457                 InitCommandEvent(event);
1458                 event.SetString(GetValue());
1459                 if ( GetEventHandler()->ProcessEvent(event) )
1460                     return;
1461             }
1462             //else: multiline controls need Enter for themselves
1463
1464             break;
1465
1466         case WXK_TAB:
1467             // always produce navigation event - even if we process TAB
1468             // ourselves the fact that we got here means that the user code
1469             // decided to skip processing of this TAB - probably to let it
1470             // do its default job.
1471             {
1472                 wxNavigationKeyEvent eventNav;
1473                 eventNav.SetDirection(!event.ShiftDown());
1474                 eventNav.SetWindowChange(event.ControlDown());
1475                 eventNav.SetEventObject(this);
1476
1477                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1478                     return;
1479             }
1480             break;
1481     }
1482
1483     // no, we didn't process it
1484     event.Skip();
1485 }
1486
1487 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1488 {
1489     long lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1490
1491     if ( nMsg == WM_GETDLGCODE )
1492     {
1493         // we always want the chars and the arrows: the arrows for navigation
1494         // and the chars because we want Ctrl-C to work even in a read only
1495         // control
1496         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1497
1498         if ( IsEditable() )
1499         {
1500             // we may have several different cases:
1501             // 1. normal case: both TAB and ENTER are used for dlg navigation
1502             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1503             //    next control in the dialog
1504             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1505             //    navigation
1506             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1507             //    to the next control
1508
1509             // the multiline edit control should always get <Return> for itself
1510             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1511                 lDlgCode |= DLGC_WANTMESSAGE;
1512
1513             if ( HasFlag(wxTE_PROCESS_TAB) )
1514                 lDlgCode |= DLGC_WANTTAB;
1515
1516             lRc |= lDlgCode;
1517         }
1518         else // !editable
1519         {
1520             // NB: use "=", not "|=" as the base class version returns the
1521             //     same flags is this state as usual (i.e. including
1522             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1523             //     native Win32 apps?) but for now live with it.
1524             lRc = lDlgCode;
1525         }
1526     }
1527
1528     return lRc;
1529 }
1530
1531 // ----------------------------------------------------------------------------
1532 // text control event processing
1533 // ----------------------------------------------------------------------------
1534
1535 bool wxTextCtrl::SendUpdateEvent()
1536 {
1537     // is event reporting suspended?
1538     if ( m_suppressNextUpdate )
1539     {
1540         // do process the next one
1541         m_suppressNextUpdate = FALSE;
1542
1543         return FALSE;
1544     }
1545
1546     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1547     InitCommandEvent(event);
1548     event.SetString(GetValue());
1549
1550     return ProcessCommand(event);
1551 }
1552
1553 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1554 {
1555     switch ( param )
1556     {
1557         case EN_SETFOCUS:
1558         case EN_KILLFOCUS:
1559             {
1560                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1561                                                          : wxEVT_SET_FOCUS,
1562                                    m_windowId);
1563                 event.SetEventObject(this);
1564                 GetEventHandler()->ProcessEvent(event);
1565             }
1566             break;
1567
1568         case EN_CHANGE:
1569             SendUpdateEvent();
1570             break;
1571
1572         case EN_MAXTEXT:
1573             // the text size limit has been hit -- try to increase it
1574             if ( !AdjustSpaceLimit() )
1575             {
1576                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1577                 InitCommandEvent(event);
1578                 event.SetString(GetValue());
1579                 ProcessCommand(event);
1580             }
1581             break;
1582
1583             // the other edit notification messages are not processed
1584         default:
1585             return FALSE;
1586     }
1587
1588     // processed
1589     return TRUE;
1590 }
1591
1592 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1593 #if wxUSE_CTL3D
1594                                WXUINT message,
1595                                WXWPARAM wParam,
1596                                WXLPARAM lParam
1597 #else
1598                                WXUINT WXUNUSED(message),
1599                                WXWPARAM WXUNUSED(wParam),
1600                                WXLPARAM WXUNUSED(lParam)
1601 #endif
1602     )
1603 {
1604 #if wxUSE_CTL3D
1605     if ( m_useCtl3D )
1606     {
1607         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1608         return (WXHBRUSH) hbrush;
1609     }
1610 #endif // wxUSE_CTL3D
1611
1612     HDC hdc = (HDC)pDC;
1613     wxColour colBack = GetBackgroundColour();
1614
1615     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1616         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1617
1618     ::SetBkColor(hdc, wxColourToRGB(colBack));
1619     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1620
1621     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1622
1623     return (WXHBRUSH)brush->GetResourceHandle();
1624 }
1625
1626 // In WIN16, need to override normal erasing because
1627 // Ctl3D doesn't use the wxWindows background colour.
1628 #ifdef __WIN16__
1629 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1630 {
1631     wxColour col(m_backgroundColour);
1632
1633 #if wxUSE_CTL3D
1634     if (m_useCtl3D)
1635         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1636 #endif
1637
1638     RECT rect;
1639     ::GetClientRect(GetHwnd(), &rect);
1640
1641     COLORREF ref = wxColourToRGB(col);
1642     HBRUSH hBrush = ::CreateSolidBrush(ref);
1643     if ( !hBrush )
1644         wxLogLastError(wxT("CreateSolidBrush"));
1645
1646     HDC hdc = (HDC)event.GetDC()->GetHDC();
1647
1648     int mode = ::SetMapMode(hdc, MM_TEXT);
1649
1650     ::FillRect(hdc, &rect, hBrush);
1651     ::DeleteObject(hBrush);
1652     ::SetMapMode(hdc, mode);
1653
1654 }
1655 #endif // Win16
1656
1657 bool wxTextCtrl::AdjustSpaceLimit()
1658 {
1659 #ifndef __WIN16__
1660     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1661
1662     // HACK: we try to automatically extend the limit for the amount of text
1663     //       to allow (interactively) entering more than 64Kb of text under
1664     //       Win9x but we shouldn't reset the text limit which was previously
1665     //       set explicitly with SetMaxLength()
1666     //
1667     //       we could solve this by storing the limit we set in wxTextCtrl but
1668     //       to save space we prefer to simply test here the actual limit
1669     //       value: we consider that SetMaxLength() can only be called for
1670     //       values < 32Kb
1671     if ( limit < 0x8000 )
1672     {
1673         // we've got more text than limit set by SetMaxLength()
1674         return FALSE;
1675     }
1676
1677     unsigned int len = ::GetWindowTextLength(GetHwnd());
1678     if ( len >= limit )
1679     {
1680         limit = len + 0x8000;    // 32Kb
1681
1682 #if wxUSE_RICHEDIT
1683         if ( IsRich() )
1684         {
1685             // as a nice side effect, this also allows passing limit > 64Kb
1686             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1687         }
1688         else
1689 #endif // wxUSE_RICHEDIT
1690         {
1691             if ( limit > 0xffff )
1692             {
1693                 // this will set it to a platform-dependent maximum (much more
1694                 // than 64Kb under NT)
1695                 limit = 0;
1696             }
1697
1698             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1699         }
1700     }
1701 #endif // !Win16
1702
1703     // we changed the limit
1704     return TRUE;
1705 }
1706
1707 bool wxTextCtrl::AcceptsFocus() const
1708 {
1709     // we don't want focus if we can't be edited unless we're a multiline
1710     // control because then it might be still nice to get focus from keyboard
1711     // to be able to scroll it without mouse
1712     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1713 }
1714
1715 wxSize wxTextCtrl::DoGetBestSize() const
1716 {
1717     int cx, cy;
1718     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1719
1720     int wText = DEFAULT_ITEM_WIDTH;
1721
1722     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1723     if ( m_windowStyle & wxTE_MULTILINE )
1724     {
1725         hText *= wxMax(GetNumberOfLines(), 5);
1726     }
1727     //else: for single line control everything is ok
1728
1729     return wxSize(wText, hText);
1730 }
1731
1732 // ----------------------------------------------------------------------------
1733 // standard handlers for standard edit menu events
1734 // ----------------------------------------------------------------------------
1735
1736 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1737 {
1738     Cut();
1739 }
1740
1741 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1742 {
1743     Copy();
1744 }
1745
1746 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1747 {
1748     Paste();
1749 }
1750
1751 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1752 {
1753     Undo();
1754 }
1755
1756 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1757 {
1758     Redo();
1759 }
1760
1761 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
1762 {
1763     long from, to;
1764     GetSelection(& from, & to);
1765     if (from != -1 && to != -1)
1766         Remove(from, to);
1767 }
1768
1769 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1770 {
1771     SetSelection(-1, -1);
1772 }
1773
1774 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1775 {
1776     event.Enable( CanCut() );
1777 }
1778
1779 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1780 {
1781     event.Enable( CanCopy() );
1782 }
1783
1784 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1785 {
1786     event.Enable( CanPaste() );
1787 }
1788
1789 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1790 {
1791     event.Enable( CanUndo() );
1792 }
1793
1794 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1795 {
1796     event.Enable( CanRedo() );
1797 }
1798
1799 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
1800 {
1801     long from, to;
1802     GetSelection(& from, & to);
1803     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
1804 }
1805
1806 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
1807 {
1808     event.Enable(GetLastPosition() > 0);
1809 }
1810
1811 void wxTextCtrl::OnRightClick(wxMouseEvent& event)
1812 {
1813 #if wxUSE_RICHEDIT
1814     if (IsRich())
1815     {
1816         if (!m_privateContextMenu)
1817         {
1818             m_privateContextMenu = new wxMenu;
1819             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
1820             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
1821             m_privateContextMenu->AppendSeparator();
1822             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
1823             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
1824             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
1825             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
1826             m_privateContextMenu->AppendSeparator();
1827             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
1828         }
1829         PopupMenu(m_privateContextMenu, event.GetPosition());
1830         return;
1831     }
1832     else
1833 #endif
1834     event.Skip();
1835 }
1836
1837 void wxTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
1838 {
1839     // be sure the caret remains invisible if the user had hidden it
1840     if ( !m_isNativeCaretShown )
1841     {
1842         ::HideCaret(GetHwnd());
1843     }
1844 }
1845
1846 // the rest of the file only deals with the rich edit controls
1847 #if wxUSE_RICHEDIT
1848
1849 // ----------------------------------------------------------------------------
1850 // EN_LINK processing
1851 // ----------------------------------------------------------------------------
1852
1853 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1854 {
1855     NMHDR *hdr = (NMHDR* )lParam;
1856     switch ( hdr->code )
1857     {
1858        case EN_MSGFILTER:
1859             {
1860                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
1861                 UINT msg = msgf->msg;
1862
1863                 // this is a bit crazy but richedit 1.0 sends us all mouse
1864                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
1865                 // generate the wxWin events for this message manually
1866                 //
1867                 // NB: in fact, this is still not totally correct as it does
1868                 //     send us WM_LBUTTONUP if the selection was cleared by the
1869                 //     last click -- so currently we get 2 events in this case,
1870                 //     but as I don't see any obvious way to check for this I
1871                 //     leave this code in place because it's still better than
1872                 //     not getting left up events at all
1873                 if ( msg == WM_LBUTTONUP )
1874                 {
1875                     WXUINT flags = msgf->wParam;
1876                     int x = GET_X_LPARAM(msgf->lParam),
1877                         y = GET_Y_LPARAM(msgf->lParam);
1878
1879                     HandleMouseEvent(msg, x, y, flags);
1880                 }
1881             }
1882
1883             // return TRUE to process the event (and FALSE to ignore it)
1884             return TRUE;
1885
1886         case EN_LINK:
1887             {
1888                 const ENLINK *enlink = (ENLINK *)hdr;
1889
1890                 switch ( enlink->msg )
1891                 {
1892                     case WM_SETCURSOR:
1893                         // ok, so it is hardcoded - do we really nee to
1894                         // customize it?
1895                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1896                         *result = TRUE;
1897                         break;
1898
1899                     case WM_MOUSEMOVE:
1900                     case WM_LBUTTONDOWN:
1901                     case WM_LBUTTONUP:
1902                     case WM_LBUTTONDBLCLK:
1903                     case WM_RBUTTONDOWN:
1904                     case WM_RBUTTONUP:
1905                     case WM_RBUTTONDBLCLK:
1906                         // send a mouse event
1907                         {
1908                             static const wxEventType eventsMouse[] =
1909                             {
1910                                 wxEVT_MOTION,
1911                                 wxEVT_LEFT_DOWN,
1912                                 wxEVT_LEFT_UP,
1913                                 wxEVT_LEFT_DCLICK,
1914                                 wxEVT_RIGHT_DOWN,
1915                                 wxEVT_RIGHT_UP,
1916                                 wxEVT_RIGHT_DCLICK,
1917                             };
1918
1919                             // the event ids are consecutive
1920                             wxMouseEvent
1921                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1922
1923                             InitMouseEvent(evtMouse,
1924                                            GET_X_LPARAM(enlink->lParam),
1925                                            GET_Y_LPARAM(enlink->lParam),
1926                                            enlink->wParam);
1927
1928                             wxTextUrlEvent event(m_windowId, evtMouse,
1929                                                  enlink->chrg.cpMin,
1930                                                  enlink->chrg.cpMax);
1931
1932                             InitCommandEvent(event);
1933
1934                             *result = ProcessCommand(event);
1935                         }
1936                         break;
1937                 }
1938             }
1939             return TRUE;
1940     }
1941
1942     // not processed, leave it to the base class
1943     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
1944 }
1945
1946 // ----------------------------------------------------------------------------
1947 // colour setting for the rich edit controls
1948 // ----------------------------------------------------------------------------
1949
1950 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1951 {
1952     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1953     {
1954         // colour didn't really change
1955         return FALSE;
1956     }
1957
1958     if ( IsRich() )
1959     {
1960         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1961         // EM_SETBKGNDCOLOR additionally
1962         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1963     }
1964
1965     return TRUE;
1966 }
1967
1968 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1969 {
1970     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1971     {
1972         // colour didn't really change
1973         return FALSE;
1974     }
1975
1976     if ( IsRich() )
1977     {
1978         // change the colour of everything
1979         CHARFORMAT cf;
1980         wxZeroMemory(cf);
1981         cf.cbSize = sizeof(cf);
1982         cf.dwMask = CFM_COLOR;
1983         cf.crTextColor = wxColourToRGB(colour);
1984         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1985     }
1986
1987     return TRUE;
1988 }
1989
1990 // ----------------------------------------------------------------------------
1991 // styling support for rich edit controls
1992 // ----------------------------------------------------------------------------
1993
1994 #if wxUSE_RICHEDIT
1995
1996 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1997 {
1998     if ( !IsRich() )
1999     {
2000         // can't do it with normal text control
2001         return FALSE;
2002     }
2003
2004     // the richedit 1.0 doesn't handle setting background colour, so don't
2005     // even try to do anything if it's the only thing we want to change
2006     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
2007         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
2008         !style.HasTabs() )
2009     {
2010         // nothing to do: return TRUE if there was really nothing to do and
2011         // FALSE if we failed to set bg colour
2012         return !style.HasBackgroundColour();
2013     }
2014
2015     // order the range if needed
2016     if ( start > end )
2017     {
2018         long tmp = start;
2019         start = end;
2020         end = tmp;
2021     }
2022
2023     // we can only change the format of the selection, so select the range we
2024     // want and restore the old selection later
2025     long startOld, endOld;
2026     GetSelection(&startOld, &endOld);
2027
2028     // but do we really have to change the selection?
2029     bool changeSel = start != startOld || end != endOld;
2030
2031     if ( changeSel )
2032     {
2033         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
2034     }
2035
2036     // initialize CHARFORMAT struct
2037 #if wxUSE_RICHEDIT2
2038     CHARFORMAT2 cf;
2039 #else
2040     CHARFORMAT cf;
2041 #endif
2042
2043     wxZeroMemory(cf);
2044
2045     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2046     // CHARFORMAT in that case
2047 #if wxUSE_RICHEDIT2
2048     if ( m_verRichEdit == 1 )
2049     {
2050         // this is the only thing the control is going to grok
2051         cf.cbSize = sizeof(CHARFORMAT);
2052     }
2053     else
2054 #endif
2055     {
2056         // CHARFORMAT or CHARFORMAT2
2057         cf.cbSize = sizeof(cf);
2058     }
2059
2060     if ( style.HasFont() )
2061     {
2062         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
2063         //     but using it doesn't seem to hurt neither so leaving it for now
2064
2065         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
2066                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
2067
2068         // fill in data from LOGFONT but recalculate lfHeight because we need
2069         // the real height in twips and not the negative number which
2070         // wxFillLogFont() returns (this is correct in general and works with
2071         // the Windows font mapper, but not here)
2072         LOGFONT lf;
2073         wxFillLogFont(&lf, &style.GetFont());
2074         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
2075         cf.bCharSet = lf.lfCharSet;
2076         cf.bPitchAndFamily = lf.lfPitchAndFamily;
2077         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
2078
2079         // also deal with underline/italic/bold attributes: note that we must
2080         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
2081         // style to allow clearing it
2082         if ( lf.lfItalic )
2083         {
2084             cf.dwEffects |= CFE_ITALIC;
2085         }
2086
2087         if ( lf.lfWeight == FW_BOLD )
2088         {
2089             cf.dwEffects |= CFE_BOLD;
2090         }
2091
2092         if ( lf.lfUnderline )
2093         {
2094             cf.dwEffects |= CFE_UNDERLINE;
2095         }
2096
2097         // strikeout fonts are not supported by wxWindows
2098     }
2099
2100     if ( style.HasTextColour() )
2101     {
2102         cf.dwMask |= CFM_COLOR;
2103         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2104     }
2105
2106 #if wxUSE_RICHEDIT2
2107     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2108     {
2109         cf.dwMask |= CFM_BACKCOLOR;
2110         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2111     }
2112 #endif // wxUSE_RICHEDIT2
2113
2114     // do format the selection
2115     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
2116                             SCF_SELECTION, (LPARAM)&cf) != 0;
2117     if ( !ok )
2118     {
2119         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
2120     }
2121
2122     // now do the paragraph formatting
2123     PARAFORMAT2 pf;
2124     wxZeroMemory(pf);
2125     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2126     // PARAFORMAT in that case
2127 #if wxUSE_RICHEDIT2
2128     if ( m_verRichEdit == 1 )
2129     {
2130         // this is the only thing the control is going to grok
2131         pf.cbSize = sizeof(PARAFORMAT);
2132     }
2133     else
2134 #endif
2135     {
2136         // PARAFORMAT or PARAFORMAT2
2137         pf.cbSize = sizeof(pf);
2138     }
2139
2140     if (style.HasAlignment())
2141     {
2142         pf.dwMask |= PFM_ALIGNMENT;
2143         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2144             pf.wAlignment = PFA_RIGHT;
2145         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2146             pf.wAlignment = PFA_CENTER;
2147         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2148             pf.wAlignment = PFA_JUSTIFY;
2149         else
2150             pf.wAlignment = PFA_LEFT;
2151     }
2152
2153     if (style.HasLeftIndent())
2154     {
2155         pf.dwMask |= PFM_STARTINDENT;
2156
2157         // Convert from 1/10 mm to TWIPS
2158         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2159
2160         // TODO: do we need to specify dxOffset?
2161     }
2162
2163     if (style.HasRightIndent())
2164     {
2165         pf.dwMask |= PFM_RIGHTINDENT;
2166
2167         // Convert from 1/10 mm to TWIPS
2168         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2169     }
2170
2171     if (style.HasTabs())
2172     {
2173         pf.dwMask |= PFM_TABSTOPS;
2174
2175         const wxArrayInt& tabs = style.GetTabs();
2176
2177         pf.cTabCount = wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2178         size_t i;
2179         for (i = 0; i < (size_t) pf.cTabCount; i++)
2180         {
2181             // Convert from 1/10 mm to TWIPS
2182             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2183         }
2184     }
2185
2186     if (pf.dwMask != 0)
2187     {
2188         // do format the selection
2189         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2190             0, (LPARAM) &pf) != 0;
2191         if ( !ok )
2192         {
2193             wxLogDebug(_T("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2194         }
2195     }
2196
2197     if ( changeSel )
2198     {
2199         // restore the original selection
2200         DoSetSelection(startOld, endOld, FALSE);
2201     }
2202
2203     return ok;
2204 }
2205
2206 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2207 {
2208     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2209         return FALSE;
2210
2211     // we have to do this or the style wouldn't apply for the text typed by the
2212     // user
2213     long posLast = GetLastPosition();
2214     SetStyle(posLast, posLast, m_defaultStyle);
2215
2216     return TRUE;
2217 }
2218
2219 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2220 {
2221     if ( !IsRich() )
2222     {
2223         // can't do it with normal text control
2224         return FALSE;
2225     }
2226
2227     // initialize CHARFORMAT struct
2228 #if wxUSE_RICHEDIT2
2229     CHARFORMAT2 cf;
2230 #else
2231     CHARFORMAT cf;
2232 #endif
2233
2234     wxZeroMemory(cf);
2235
2236     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2237     // CHARFORMAT in that case
2238 #if wxUSE_RICHEDIT2
2239     if ( m_verRichEdit == 1 )
2240     {
2241         // this is the only thing the control is going to grok
2242         cf.cbSize = sizeof(CHARFORMAT);
2243     }
2244     else
2245 #endif
2246     {
2247         // CHARFORMAT or CHARFORMAT2
2248         cf.cbSize = sizeof(cf);
2249     }
2250     // we can only change the format of the selection, so select the range we
2251     // want and restore the old selection later
2252     long startOld, endOld;
2253     GetSelection(&startOld, &endOld);
2254
2255     // but do we really have to change the selection?
2256     bool changeSel = position != startOld || position != endOld;
2257
2258     if ( changeSel )
2259     {
2260         DoSetSelection(position, position, FALSE /* don't scroll caret into view */);
2261     }
2262
2263     // get the selection formatting
2264     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2265                             SCF_SELECTION, (LPARAM)&cf) ;
2266
2267     LOGFONT lf;
2268     lf.lfHeight = cf.yHeight;
2269     lf.lfWidth = 0;
2270     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2271     lf.lfClipPrecision = 0;
2272     lf.lfEscapement = 0;
2273     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2274     if (cf.dwEffects & CFE_ITALIC)
2275         lf.lfItalic = TRUE;
2276     lf.lfOrientation = 0;
2277     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2278     lf.lfQuality = 0;
2279     if (cf.dwEffects & CFE_STRIKEOUT)
2280         lf.lfStrikeOut = TRUE;
2281     if (cf.dwEffects & CFE_UNDERLINE)
2282         lf.lfUnderline = TRUE;
2283     if (cf.dwEffects & CFE_BOLD)
2284         lf.lfWeight = FW_BOLD;
2285
2286     wxFont font = wxCreateFontFromLogFont(& lf);
2287     if (font.Ok())
2288     {
2289         style.SetFont(font);
2290     }
2291     style.SetTextColour(wxColour(cf.crTextColor));
2292
2293 #if wxUSE_RICHEDIT2
2294     if ( m_verRichEdit != 1 )
2295     {
2296         // cf.dwMask |= CFM_BACKCOLOR;
2297         style.SetBackgroundColour(wxColour(cf.crBackColor));
2298     }
2299 #endif // wxUSE_RICHEDIT2
2300
2301     // now get the paragraph formatting
2302     PARAFORMAT2 pf;
2303     wxZeroMemory(pf);
2304     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2305     // PARAFORMAT in that case
2306 #if wxUSE_RICHEDIT2
2307     if ( m_verRichEdit == 1 )
2308     {
2309         // this is the only thing the control is going to grok
2310         pf.cbSize = sizeof(PARAFORMAT);
2311     }
2312     else
2313 #endif
2314     {
2315         // PARAFORMAT or PARAFORMAT2
2316         pf.cbSize = sizeof(pf);
2317     }
2318
2319     // do format the selection
2320     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2321
2322     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0) );
2323     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2324
2325     if (pf.wAlignment == PFA_CENTER)
2326         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2327     else if (pf.wAlignment == PFA_RIGHT)
2328         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2329     else if (pf.wAlignment == PFA_JUSTIFY)
2330         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2331     else
2332         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2333
2334     wxArrayInt tabStops;
2335     size_t i;
2336     for (i = 0; i < (size_t) pf.cTabCount; i++)
2337     {
2338         tabStops[i] = (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) ;
2339     }
2340
2341     if ( changeSel )
2342     {
2343         // restore the original selection
2344         DoSetSelection(startOld, endOld, FALSE);
2345     }
2346
2347     return TRUE;
2348 }
2349
2350 #endif
2351
2352 // ----------------------------------------------------------------------------
2353 // wxRichEditModule
2354 // ----------------------------------------------------------------------------
2355
2356 bool wxRichEditModule::OnInit()
2357 {
2358     // don't do anything - we will load it when needed
2359     return TRUE;
2360 }
2361
2362 void wxRichEditModule::OnExit()
2363 {
2364     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2365     {
2366         if ( ms_hRichEdit[i] )
2367         {
2368             ::FreeLibrary(ms_hRichEdit[i]);
2369             ms_hRichEdit[i] = NULL;
2370         }
2371     }
2372 }
2373
2374 /* static */
2375 bool wxRichEditModule::Load(int version)
2376 {
2377     // we don't support loading richedit 3.0 as I don't know how to distinguish
2378     // it from 2.0 anyhow
2379     wxCHECK_MSG( version == 1 || version == 2, FALSE,
2380                  _T("incorrect richedit control version requested") );
2381
2382     // make it the index in the array
2383     version--;
2384
2385     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2386     {
2387         // we had already tried to load it and failed
2388         return FALSE;
2389     }
2390
2391     if ( ms_hRichEdit[version] )
2392     {
2393         // we've already got this one
2394         return TRUE;
2395     }
2396
2397     wxString dllname = version ? _T("riched20") : _T("riched32");
2398     dllname += _T(".dll");
2399
2400     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2401
2402     if ( !ms_hRichEdit[version] )
2403     {
2404         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2405
2406         ms_hRichEdit[version] = (HINSTANCE)-1;
2407
2408         return FALSE;
2409     }
2410
2411     return TRUE;
2412 }
2413
2414 #endif // wxUSE_RICHEDIT
2415
2416 #endif // wxUSE_TEXTCTRL