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