src/msw/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/textctrl.cpp
   3 // Purpose:     wxTextCtrl
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  17     #pragma implementation "textctrl.h"
  18 #endif
  19
  20 // ----------------------------------------------------------------------------
  21 // headers
  22 // ----------------------------------------------------------------------------
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_TEXTCTRL
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/textctrl.h"
  35     #include "wx/settings.h"
  36     #include "wx/brush.h"
  37     #include "wx/utils.h"
  38     #include "wx/intl.h"
  39     #include "wx/log.h"
  40     #include "wx/app.h"
  41     #include "wx/menu.h"
  42 #endif
  43
  44 #include "wx/module.h"
  45
  46 #if wxUSE_CLIPBOARD
  47     #include "wx/clipbrd.h"
  48 #endif
  49
  50 #include "wx/textfile.h"
  51
  52 #include <windowsx.h>
  53
  54 #include "wx/msw/private.h"
  55 #include "wx/msw/winundef.h"
  56
  57 #include <string.h>
  58 #include <stdlib.h>
  59
  60 #ifndef __WXWINCE__
  61 #include <sys/types.h>
  62 #endif
  63
  64 #if wxUSE_RICHEDIT
  65
  66 // old mingw32 has richedit stuff directly in windows.h and doesn't have
  67 // richedit.h at all
  68 #if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__)
  69     #include <richedit.h>
  70 #endif
  71
  72 #include "wx/msw/missing.h"
  73
  74 #endif // wxUSE_RICHEDIT
  75
  76 // ----------------------------------------------------------------------------
  77 // private classes
  78 // ----------------------------------------------------------------------------
  79
  80 #if wxUSE_RICHEDIT
  81
  82 // this module initializes RichEdit DLL(s) if needed
  83 class wxRichEditModule : public wxModule
  84 {
  85 public:
  86     virtual bool OnInit();
  87     virtual void OnExit();
  88
  89     // load the richedit DLL of at least of required version
  90     static bool Load(int version = 1);
  91
  92 private:
  93     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
  94     static HINSTANCE ms_hRichEdit[2];
  95
  96     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
  97 };
  98
  99 HINSTANCE wxRichEditModule::ms_hRichEdit[2] = { NULL, NULL };
 100
 101 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 102
 103 #endif // wxUSE_RICHEDIT
 104
 105 // ----------------------------------------------------------------------------
 106 // event tables and other macros
 107 // ----------------------------------------------------------------------------
 108
 109 #if wxUSE_EXTENDED_RTTI
 110 WX_DEFINE_FLAGS( wxTextCtrlStyle )
 111
 112 wxBEGIN_FLAGS( wxTextCtrlStyle )
 113     // new style border flags, we put them first to
 114     // use them for streaming out
 115     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
 116     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
 117     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
 118     wxFLAGS_MEMBER(wxBORDER_RAISED)
 119     wxFLAGS_MEMBER(wxBORDER_STATIC)
 120     wxFLAGS_MEMBER(wxBORDER_NONE)
 121
 122     // old style border flags
 123     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
 124     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
 125     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
 126     wxFLAGS_MEMBER(wxRAISED_BORDER)
 127     wxFLAGS_MEMBER(wxSTATIC_BORDER)
 128     wxFLAGS_MEMBER(wxBORDER)
 129
 130     // standard window styles
 131     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
 132     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
 133     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
 134     wxFLAGS_MEMBER(wxWANTS_CHARS)
 135     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
 136     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
 137     wxFLAGS_MEMBER(wxVSCROLL)
 138     wxFLAGS_MEMBER(wxHSCROLL)
 139
 140     wxFLAGS_MEMBER(wxTE_PROCESS_ENTER)
 141     wxFLAGS_MEMBER(wxTE_PROCESS_TAB)
 142     wxFLAGS_MEMBER(wxTE_MULTILINE)
 143     wxFLAGS_MEMBER(wxTE_PASSWORD)
 144     wxFLAGS_MEMBER(wxTE_READONLY)
 145     wxFLAGS_MEMBER(wxHSCROLL)
 146     wxFLAGS_MEMBER(wxTE_RICH)
 147     wxFLAGS_MEMBER(wxTE_RICH2)
 148     wxFLAGS_MEMBER(wxTE_AUTO_URL)
 149     wxFLAGS_MEMBER(wxTE_NOHIDESEL)
 150     wxFLAGS_MEMBER(wxTE_LEFT)
 151     wxFLAGS_MEMBER(wxTE_CENTRE)
 152     wxFLAGS_MEMBER(wxTE_RIGHT)
 153     wxFLAGS_MEMBER(wxTE_DONTWRAP)
 154     wxFLAGS_MEMBER(wxTE_LINEWRAP)
 155     wxFLAGS_MEMBER(wxTE_WORDWRAP)
 156
 157 wxEND_FLAGS( wxTextCtrlStyle )
 158
 159 IMPLEMENT_DYNAMIC_CLASS_XTI(wxTextCtrl, wxControl,"wx/textctrl.h")
 160
 161 wxBEGIN_PROPERTIES_TABLE(wxTextCtrl)
 162     wxEVENT_PROPERTY( TextUpdated , wxEVT_COMMAND_TEXT_UPDATED , wxCommandEvent )
 163     wxEVENT_PROPERTY( TextEnter , wxEVT_COMMAND_TEXT_ENTER , wxCommandEvent )
 164
 165     wxPROPERTY( Font , wxFont , SetFont , GetFont  , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 166         wxPROPERTY( Value , wxString , SetValue, GetValue, wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 167     wxPROPERTY_FLAGS( WindowStyle , wxTextCtrlStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 168 wxEND_PROPERTIES_TABLE()
 169
 170 wxBEGIN_HANDLERS_TABLE(wxTextCtrl)
 171 wxEND_HANDLERS_TABLE()
 172
 173 wxCONSTRUCTOR_6( wxTextCtrl , wxWindow* , Parent , wxWindowID , Id , wxString , Value , wxPoint , Position , wxSize , Size , long , WindowStyle)
 174 #else
 175 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 176 #endif
 177
 178
 179 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 180     EVT_CHAR(wxTextCtrl::OnChar)
 181     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 182
 183 #if wxUSE_RICHEDIT
 184     EVT_RIGHT_UP(wxTextCtrl::OnRightClick)
 185 #endif
 186
 187     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 188     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 189     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 190     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 191     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 192     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 193     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 194
 195     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 196     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 197     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 198     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 199     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 200     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 201     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 202
 203     EVT_SET_FOCUS(wxTextCtrl::OnSetFocus)
 204 END_EVENT_TABLE()
 205
 206 // ============================================================================
 207 // implementation
 208 // ============================================================================
 209
 210 // ----------------------------------------------------------------------------
 211 // creation
 212 // ----------------------------------------------------------------------------
 213
 214 void wxTextCtrl::Init()
 215 {
 216 #if wxUSE_RICHEDIT
 217     m_verRichEdit = 0;
 218 #endif // wxUSE_RICHEDIT
 219
 220     m_privateContextMenu = NULL;
 221     m_suppressNextUpdate = FALSE;
 222     m_isNativeCaretShown = true;
 223 }
 224
 225 wxTextCtrl::~wxTextCtrl()
 226 {
 227     if (m_privateContextMenu)
 228     {
 229         delete m_privateContextMenu;
 230         m_privateContextMenu = NULL;
 231     }
 232 }
 233
 234 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 235                         const wxString& value,
 236                         const wxPoint& pos,
 237                         const wxSize& size,
 238                         long style,
 239                         const wxValidator& validator,
 240                         const wxString& name)
 241 {
 242 #ifdef __WXWINCE__
 243     if ((style & wxBORDER_MASK) == 0)
 244         style |= wxBORDER_SIMPLE;
 245 #endif
 246
 247     // base initialization
 248     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 249         return FALSE;
 250
 251     if ( parent )
 252         parent->AddChild(this);
 253
 254     // translate wxWin style flags to MSW ones
 255     WXDWORD msStyle = MSWGetCreateWindowFlags();
 256
 257     // do create the control - either an EDIT or RICHEDIT
 258     wxString windowClass = wxT("EDIT");
 259
 260 #if wxUSE_RICHEDIT
 261     if ( m_windowStyle & wxTE_AUTO_URL )
 262     {
 263         // automatic URL detection only works in RichEdit 2.0+
 264         m_windowStyle |= wxTE_RICH2;
 265     }
 266
 267     if ( m_windowStyle & wxTE_RICH2 )
 268     {
 269         // using richedit 2.0 implies using wxTE_RICH
 270         m_windowStyle |= wxTE_RICH;
 271     }
 272
 273     // we need to load the richedit DLL before creating the rich edit control
 274     if ( m_windowStyle & wxTE_RICH )
 275     {
 276         static bool s_errorGiven = FALSE;// MT-FIXME
 277
 278         // Which version do we need? Use 1.0 by default because it is much more
 279         // like the the standard EDIT or 2.0 if explicitly requested, but use
 280         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 281         //
 282         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 283         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 284         //       should use 3.0 if available as it is the best of both worlds -
 285         //       but as I can't test it right now I don't do it (VZ)
 286 #if wxUSE_UNICODE
 287         const int verRichEdit = 2;
 288 #else // !wxUSE_UNICODE
 289         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 290 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 291
 292         // only give the error msg once if the DLL can't be loaded
 293         if ( !s_errorGiven )
 294         {
 295             // try to load the RichEdit DLL (will do nothing if already done)
 296             if ( !wxRichEditModule::Load(verRichEdit) )
 297             {
 298 #if !wxUSE_UNICODE
 299                 // try another version?
 300                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 301
 302                 if ( !wxRichEditModule::Load(verRichEdit) )
 303 #endif // wxUSE_UNICODE
 304                 {
 305                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 306
 307                     s_errorGiven = TRUE;
 308                 }
 309             }
 310         }
 311
 312         // have we managed to load any richedit version?
 313         if ( !s_errorGiven )
 314         {
 315             m_verRichEdit = verRichEdit;
 316             if ( m_verRichEdit == 1 )
 317             {
 318                 windowClass = wxT("RICHEDIT");
 319             }
 320             else
 321             {
 322 #ifndef RICHEDIT_CLASS
 323                 wxString RICHEDIT_CLASS;
 324                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 325 #if wxUSE_UNICODE
 326                 RICHEDIT_CLASS += _T('W');
 327 #else // ANSI
 328                 RICHEDIT_CLASS += _T('A');
 329 #endif // Unicode/ANSI
 330 #endif // !RICHEDIT_CLASS
 331
 332                 windowClass = RICHEDIT_CLASS;
 333             }
 334         }
 335     }
 336 #endif // wxUSE_RICHEDIT
 337
 338     // we need to turn '\n's into "\r\n"s for the multiline controls
 339     wxString valueWin;
 340     if ( m_windowStyle & wxTE_MULTILINE )
 341     {
 342         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 343     }
 344     else // single line
 345     {
 346         valueWin = value;
 347     }
 348
 349     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 350         return FALSE;
 351
 352     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 353
 354 #if wxUSE_RICHEDIT
 355     if ( IsRich() )
 356     {
 357         // enable the events we're interested in: we want to get EN_CHANGE as
 358         // for the normal controls
 359         LPARAM mask = ENM_CHANGE;
 360
 361         if ( GetRichVersion() == 1 )
 362         {
 363             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 364             // explained in its handler
 365            mask |= ENM_MOUSEEVENTS;
 366         }
 367         else if ( m_windowStyle & wxTE_AUTO_URL )
 368         {
 369             mask |= ENM_LINK;
 370
 371             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 372         }
 373
 374         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 375     }
 376 #endif // wxUSE_RICHEDIT
 377
 378     return TRUE;
 379 }
 380
 381 // Make sure the window style (etc.) reflects the HWND style (roughly)
 382 void wxTextCtrl::AdoptAttributesFromHWND()
 383 {
 384     wxWindow::AdoptAttributesFromHWND();
 385
 386     HWND hWnd = GetHwnd();
 387     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 388
 389     // retrieve the style to see whether this is an edit or richedit ctrl
 390 #if wxUSE_RICHEDIT
 391     wxString classname = wxGetWindowClass(GetHWND());
 392
 393     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 394     {
 395         m_verRichEdit = 0;
 396     }
 397     else // rich edit?
 398     {
 399         wxChar c;
 400         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 401         {
 402             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 403
 404             m_verRichEdit = 0;
 405         }
 406     }
 407 #endif // wxUSE_RICHEDIT
 408
 409     if (style & ES_MULTILINE)
 410         m_windowStyle |= wxTE_MULTILINE;
 411     if (style & ES_PASSWORD)
 412         m_windowStyle |= wxTE_PASSWORD;
 413     if (style & ES_READONLY)
 414         m_windowStyle |= wxTE_READONLY;
 415     if (style & ES_WANTRETURN)
 416         m_windowStyle |= wxTE_PROCESS_ENTER;
 417     if (style & ES_CENTER)
 418         m_windowStyle |= wxTE_CENTRE;
 419     if (style & ES_RIGHT)
 420         m_windowStyle |= wxTE_RIGHT;
 421 }
 422
 423 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 424 {
 425     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 426
 427     // styles which we alaways add by default
 428     if ( style & wxTE_MULTILINE )
 429     {
 430         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 431                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 432
 433         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 434         if ( !(style & wxTE_NO_VSCROLL) )
 435         {
 436             // always adjust the vertical scrollbar automatically if we have it
 437             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 438
 439 #if wxUSE_RICHEDIT
 440             // we have to use this style for the rich edit controls because
 441             // without it the vertical scrollbar never appears at all in
 442             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 443             if ( style & wxTE_RICH2 )
 444             {
 445                 msStyle |= ES_DISABLENOSCROLL;
 446             }
 447 #endif // wxUSE_RICHEDIT
 448         }
 449
 450         style |= wxTE_PROCESS_ENTER;
 451     }
 452     else // !multiline
 453     {
 454         // there is really no reason to not have this style for single line
 455         // text controls
 456         msStyle |= ES_AUTOHSCROLL;
 457     }
 458
 459     // note that wxTE_DONTWRAP is the same as wxHSCROLL so if we have a horz
 460     // scrollbar, there is no wrapping -- which makes sense
 461     if ( style & wxTE_DONTWRAP )
 462     {
 463         // automatically scroll the control horizontally as necessary
 464         msStyle |= WS_HSCROLL;
 465     }
 466
 467     if ( style & wxTE_READONLY )
 468         msStyle |= ES_READONLY;
 469
 470     if ( style & wxTE_PASSWORD )
 471         msStyle |= ES_PASSWORD;
 472
 473     if ( style & wxTE_NOHIDESEL )
 474         msStyle |= ES_NOHIDESEL;
 475
 476     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 477     if ( style & wxTE_CENTRE )
 478         msStyle |= ES_CENTER;
 479     else if ( style & wxTE_RIGHT )
 480         msStyle |= ES_RIGHT;
 481     else
 482         msStyle |= ES_LEFT; // ES_LEFT is 0 as well but for consistency...
 483
 484     return msStyle;
 485 }
 486
 487 void wxTextCtrl::SetWindowStyleFlag(long style)
 488 {
 489 #if wxUSE_RICHEDIT
 490     // we have to deal with some styles separately because they can't be
 491     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 492     // using richedit-specific EM_SETOPTIONS
 493     if ( IsRich() &&
 494             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 495     {
 496         bool set = (style & wxTE_NOHIDESEL) != 0;
 497
 498         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 499                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 500     }
 501 #endif // wxUSE_RICHEDIT
 502
 503     wxControl::SetWindowStyleFlag(style);
 504 }
 505
 506 // ----------------------------------------------------------------------------
 507 // set/get the controls text
 508 // ----------------------------------------------------------------------------
 509
 510 wxString wxTextCtrl::GetValue() const
 511 {
 512     // range 0..-1 is special for GetRange() and means to retrieve all text
 513     return GetRange(0, -1);
 514 }
 515
 516 wxString wxTextCtrl::GetRange(long from, long to) const
 517 {
 518     wxString str;
 519
 520     if ( from >= to && to != -1 )
 521     {
 522         // nothing to retrieve
 523         return str;
 524     }
 525
 526 #if wxUSE_RICHEDIT
 527     if ( IsRich() )
 528     {
 529         int len = GetWindowTextLength(GetHwnd());
 530         if ( len > from )
 531         {
 532             if ( to == -1 )
 533                 to = len;
 534
 535 #if !wxUSE_UNICODE
 536             // we must use EM_STREAMOUT if we don't want to lose all characters
 537             // not representable in the current character set (EM_GETTEXTRANGE
 538             // simply replaces them with question marks...)
 539             if ( GetRichVersion() > 1 )
 540             {
 541                 // we must have some encoding, otherwise any 8bit chars in the
 542                 // control are simply *lost* (replaced by '?')
 543                 wxFontEncoding encoding = wxFONTENCODING_SYSTEM;
 544
 545                 wxFont font = m_defaultStyle.GetFont();
 546                 if ( !font.Ok() )
 547                     font = GetFont();
 548
 549                 if ( font.Ok() )
 550                 {
 551                    encoding = font.GetEncoding();
 552                 }
 553
 554                 if ( encoding == wxFONTENCODING_SYSTEM )
 555                 {
 556                     encoding = wxLocale::GetSystemEncoding();
 557                 }
 558
 559                 if ( encoding == wxFONTENCODING_SYSTEM )
 560                 {
 561                     encoding = wxFONTENCODING_ISO8859_1;
 562                 }
 563
 564                 str = StreamOut(encoding);
 565
 566                 if ( !str.empty() )
 567                 {
 568                     // we have to manually extract the required part, luckily
 569                     // this is easy in this case as EOL characters in str are
 570                     // just LFs because we remove CRs in wxRichEditStreamOut
 571                     str = str.Mid(from, to - from);
 572                 }
 573             }
 574
 575             // StreamOut() wasn't used or failed, try to do it in normal way
 576             if ( str.empty() )
 577 #endif // !wxUSE_UNICODE
 578             {
 579                 // alloc one extra WORD as needed by the control
 580                 wxStringBuffer tmp(str, ++len);
 581                 wxChar *p = tmp;
 582
 583                 TEXTRANGE textRange;
 584                 textRange.chrg.cpMin = from;
 585                 textRange.chrg.cpMax = to;
 586                 textRange.lpstrText = p;
 587
 588                 (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE,
 589                                   0, (LPARAM)&textRange);
 590
 591                 if ( m_verRichEdit > 1 )
 592                 {
 593                     // RichEdit 2.0 uses just CR ('\r') for the
 594                     // newlines which is neither Unix nor Windows
 595                     // style - convert it to something reasonable
 596                     for ( ; *p; p++ )
 597                     {
 598                         if ( *p == _T('\r') )
 599                             *p = _T('\n');
 600                     }
 601                 }
 602             }
 603
 604             if ( m_verRichEdit == 1 )
 605             {
 606                 // convert to the canonical form - see comment below
 607                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 608             }
 609         }
 610         //else: no text at all, leave the string empty
 611     }
 612     else
 613 #endif // wxUSE_RICHEDIT
 614     {
 615         // retrieve all text
 616         str = wxGetWindowText(GetHWND());
 617
 618         // need only a range?
 619         if ( from < to )
 620         {
 621             str = str.Mid(from, to - from);
 622         }
 623
 624         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 625         // canonical one (same one as above) for consistency with the other kinds
 626         // of controls and, more importantly, with the other ports
 627         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 628     }
 629
 630     return str;
 631 }
 632
 633 void wxTextCtrl::SetValue(const wxString& value)
 634 {
 635     // if the text is long enough, it's faster to just set it instead of first
 636     // comparing it with the old one (chances are that it will be different
 637     // anyhow, this comparison is there to avoid flicker for small single-line
 638     // edit controls mostly)
 639     if ( (value.length() > 0x400) || (value != GetValue()) )
 640     {
 641         DoWriteText(value, FALSE /* not selection only */);
 642
 643         // for compatibility, don't move the cursor when doing SetValue()
 644         SetInsertionPoint(0);
 645     }
 646     else // same text
 647     {
 648         // still send an event for consistency
 649         SendUpdateEvent();
 650     }
 651
 652     // we should reset the modified flag even if the value didn't really change
 653
 654     // mark the control as being not dirty - we changed its text, not the
 655     // user
 656     DiscardEdits();
 657 }
 658
 659 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 660
 661 // TODO: using memcpy() would improve performance a lot for big amounts of text
 662
 663 DWORD CALLBACK
 664 wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 665 {
 666     *pcb = 0;
 667
 668     const wchar_t ** const ppws = (const wchar_t **)dwCookie;
 669
 670     wchar_t *wbuf = (wchar_t *)buf;
 671     const wchar_t *wpc = *ppws;
 672     while ( cb && *wpc )
 673     {
 674         *wbuf++ = *wpc++;
 675
 676         cb -= sizeof(wchar_t);
 677         (*pcb) += sizeof(wchar_t);
 678     }
 679
 680     *ppws = wpc;
 681
 682     return 0;
 683 }
 684
 685 // helper struct used to pass parameters from wxTextCtrl to wxRichEditStreamOut
 686 struct wxStreamOutData
 687 {
 688     wchar_t *wpc;
 689     size_t len;
 690 };
 691
 692 DWORD CALLBACK
 693 wxRichEditStreamOut(DWORD_PTR dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 694 {
 695     *pcb = 0;
 696
 697     wxStreamOutData *data = (wxStreamOutData *)dwCookie;
 698
 699     const wchar_t *wbuf = (const wchar_t *)buf;
 700     wchar_t *wpc = data->wpc;
 701     while ( cb )
 702     {
 703         wchar_t wch = *wbuf++;
 704
 705         // turn "\r\n" into "\n" on the fly
 706         if ( wch != L'\r' )
 707             *wpc++ = wch;
 708         else
 709             data->len--;
 710
 711         cb -= sizeof(wchar_t);
 712         (*pcb) += sizeof(wchar_t);
 713     }
 714
 715     data->wpc = wpc;
 716
 717     return 0;
 718 }
 719
 720
 721 #if wxUSE_UNICODE_MSLU
 722     #define UNUSED_IF_MSLU(param)
 723 #else
 724     #define UNUSED_IF_MSLU(param) param
 725 #endif
 726
 727 bool
 728 wxTextCtrl::StreamIn(const wxString& value,
 729                      wxFontEncoding UNUSED_IF_MSLU(encoding),
 730                      bool selectionOnly)
 731 {
 732 #if wxUSE_UNICODE_MSLU
 733     const wchar_t *wpc = value.c_str();
 734 #else // !wxUSE_UNICODE_MSLU
 735     wxCSConv conv(encoding);
 736
 737     const size_t len = conv.MB2WC(NULL, value, value.length());
 738
 739 #if wxUSE_WCHAR_T
 740     wxWCharBuffer wchBuf(len);
 741     wchar_t *wpc = wchBuf.data();
 742 #else
 743     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 744     wchar_t *wpc = wchBuf;
 745 #endif
 746
 747     conv.MB2WC(wpc, value, value.length());
 748 #endif // wxUSE_UNICODE_MSLU
 749
 750     // finally, stream it in the control
 751     EDITSTREAM eds;
 752     wxZeroMemory(eds);
 753     eds.dwCookie = (DWORD)&wpc;
 754     // the cast below is needed for broken (very) old mingw32 headers
 755     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 756
 757     // we're going to receive 2 EN_CHANGE notifications if we got any selection
 758     // (same problem as in DoWriteText())
 759     if ( selectionOnly && HasSelection() )
 760     {
 761         // so suppress one of them
 762         m_suppressNextUpdate = TRUE;
 763     }
 764
 765     ::SendMessage(GetHwnd(), EM_STREAMIN,
 766                   SF_TEXT |
 767                   SF_UNICODE |
 768                   (selectionOnly ? SFF_SELECTION : 0),
 769                   (LPARAM)&eds);
 770
 771     if ( eds.dwError )
 772     {
 773         wxLogLastError(_T("EM_STREAMIN"));
 774     }
 775
 776 #if !wxUSE_WCHAR_T
 777     free(wchBuf);
 778 #endif // !wxUSE_WCHAR_T
 779
 780     return TRUE;
 781 }
 782
 783 #if !wxUSE_UNICODE_MSLU
 784
 785 wxString
 786 wxTextCtrl::StreamOut(wxFontEncoding encoding, bool selectionOnly) const
 787 {
 788     wxString out;
 789
 790     const int len = GetWindowTextLength(GetHwnd());
 791
 792 #if wxUSE_WCHAR_T
 793     wxWCharBuffer wchBuf(len);
 794     wchar_t *wpc = wchBuf.data();
 795 #else
 796     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 797     wchar_t *wpc = wchBuf;
 798 #endif
 799
 800     wxStreamOutData data;
 801     data.wpc = wpc;
 802     data.len = len;
 803
 804     EDITSTREAM eds;
 805     wxZeroMemory(eds);
 806     eds.dwCookie = (DWORD)&data;
 807     eds.pfnCallback = wxRichEditStreamOut;
 808
 809     ::SendMessage
 810       (
 811         GetHwnd(),
 812         EM_STREAMOUT,
 813         SF_TEXT | SF_UNICODE | (selectionOnly ? SFF_SELECTION : 0),
 814         (LPARAM)&eds
 815       );
 816
 817     if ( eds.dwError )
 818     {
 819         wxLogLastError(_T("EM_STREAMOUT"));
 820     }
 821     else // streamed out ok
 822     {
 823         // NUL-terminate the string because its length could have been
 824         // decreased by wxRichEditStreamOut
 825         *(wchBuf.data() + data.len) = L'\0';
 826
 827         // now convert to the given encoding (this is a possibly lossful
 828         // conversion but what else can we do)
 829         wxCSConv conv(encoding);
 830         size_t lenNeeded = conv.WC2MB(NULL, wchBuf, 0);
 831         if ( lenNeeded++ )
 832         {
 833             conv.WC2MB(wxStringBuffer(out, lenNeeded), wchBuf, lenNeeded);
 834         }
 835     }
 836
 837 #if !wxUSE_WCHAR_T
 838     free(wchBuf);
 839 #endif // !wxUSE_WCHAR_T
 840
 841     return out;
 842 }
 843
 844 #endif // !wxUSE_UNICODE_MSLU
 845
 846 #endif // wxUSE_RICHEDIT
 847
 848 void wxTextCtrl::WriteText(const wxString& value)
 849 {
 850     DoWriteText(value);
 851 }
 852
 853 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 854 {
 855     wxString valueDos;
 856     if ( m_windowStyle & wxTE_MULTILINE )
 857         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 858     else
 859         valueDos = value;
 860
 861 #if wxUSE_RICHEDIT
 862     // there are several complications with the rich edit controls here
 863     bool done = FALSE;
 864     if ( IsRich() )
 865     {
 866         // first, ensure that the new text will be in the default style
 867         if ( !m_defaultStyle.IsDefault() )
 868         {
 869             long start, end;
 870             GetSelection(&start, &end);
 871             SetStyle(start, end, m_defaultStyle);
 872         }
 873
 874 #if wxUSE_UNICODE_MSLU
 875         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 876         // but EM_STREAMIN works
 877         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 878         {
 879            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 880         }
 881 #endif // wxUSE_UNICODE_MSLU
 882
 883 #if !wxUSE_UNICODE
 884         // next check if the text we're inserting must be shown in a non
 885         // default charset -- this only works for RichEdit > 1.0
 886         if ( GetRichVersion() > 1 )
 887         {
 888             wxFont font = m_defaultStyle.GetFont();
 889             if ( !font.Ok() )
 890                 font = GetFont();
 891
 892             if ( font.Ok() )
 893             {
 894                wxFontEncoding encoding = font.GetEncoding();
 895                if ( encoding != wxFONTENCODING_SYSTEM )
 896                {
 897                    // we have to use EM_STREAMIN to force richedit control 2.0+
 898                    // to show any text in the non default charset -- otherwise
 899                    // it thinks it knows better than we do and always shows it
 900                    // in the default one
 901                    done = StreamIn(valueDos, encoding, selectionOnly);
 902                }
 903             }
 904         }
 905 #endif // !wxUSE_UNICODE
 906     }
 907
 908     if ( !done )
 909 #endif // wxUSE_RICHEDIT
 910     {
 911         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
 912         // call below which is confusing for the client code and so should be
 913         // avoided
 914         //
 915         // these cases are: (a) plain EDIT controls if EM_REPLACESEL is used
 916         // and there is a non empty selection currently and (b) rich text
 917         // controls in any case
 918         if (
 919 #if wxUSE_RICHEDIT
 920             IsRich() ||
 921 #endif // wxUSE_RICHEDIT
 922             (selectionOnly && HasSelection()) )
 923         {
 924             m_suppressNextUpdate = TRUE;
 925         }
 926
 927         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 928                       0, (LPARAM)valueDos.c_str());
 929
 930         // OTOH, non rich text controls don't generate any events at all when
 931         // we use WM_SETTEXT -- have to emulate them here
 932         if ( !selectionOnly
 933 #if wxUSE_RICHEDIT
 934                 && !IsRich()
 935 #endif // wxUSE_RICHEDIT
 936            )
 937         {
 938             // Windows already sends an update event for single-line
 939             // controls.
 940             if ( m_windowStyle & wxTE_MULTILINE )
 941                 SendUpdateEvent();
 942         }
 943     }
 944
 945     AdjustSpaceLimit();
 946 }
 947
 948 void wxTextCtrl::AppendText(const wxString& text)
 949 {
 950     SetInsertionPointEnd();
 951
 952     WriteText(text);
 953
 954 #if wxUSE_RICHEDIT
 955     if ( IsMultiLine() && GetRichVersion() > 1 )
 956     {
 957         // setting the caret to the end and showing it simply doesn't work for
 958         // RichEdit 2.0 -- force it to still do what we want
 959         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
 960     }
 961 #endif // wxUSE_RICHEDIT
 962 }
 963
 964 void wxTextCtrl::Clear()
 965 {
 966     ::SetWindowText(GetHwnd(), wxEmptyString);
 967
 968 #if wxUSE_RICHEDIT
 969     if ( !IsRich() )
 970 #endif // wxUSE_RICHEDIT
 971     {
 972         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 973         // but the normal ones don't -- make Clear() behaviour consistent by
 974         // always sending this event
 975
 976         // Windows already sends an update event for single-line
 977         // controls.
 978         if ( m_windowStyle & wxTE_MULTILINE )
 979             SendUpdateEvent();
 980     }
 981 }
 982
 983 #ifdef __WIN32__
 984
 985 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 986 {
 987     SetFocus();
 988
 989     size_t lenOld = GetValue().length();
 990
 991     wxUint32 code = event.GetRawKeyCode();
 992     ::keybd_event(code, 0, 0 /* key press */, 0);
 993     ::keybd_event(code, 0, KEYEVENTF_KEYUP, 0);
 994
 995     // assume that any alphanumeric key changes the total number of characters
 996     // in the control - this should work in 99% of cases
 997     return GetValue().length() != lenOld;
 998 }
 999
1000 #endif // __WIN32__
1001
1002 // ----------------------------------------------------------------------------
1003 // Clipboard operations
1004 // ----------------------------------------------------------------------------
1005
1006 void wxTextCtrl::Copy()
1007 {
1008     if (CanCopy())
1009     {
1010         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
1011     }
1012 }
1013
1014 void wxTextCtrl::Cut()
1015 {
1016     if (CanCut())
1017     {
1018         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
1019     }
1020 }
1021
1022 void wxTextCtrl::Paste()
1023 {
1024     if (CanPaste())
1025     {
1026         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
1027     }
1028 }
1029
1030 bool wxTextCtrl::HasSelection() const
1031 {
1032     long from, to;
1033     GetSelection(&from, &to);
1034     return from != to;
1035 }
1036
1037 bool wxTextCtrl::CanCopy() const
1038 {
1039     // Can copy if there's a selection
1040     return HasSelection();
1041 }
1042
1043 bool wxTextCtrl::CanCut() const
1044 {
1045     return CanCopy() && IsEditable();
1046 }
1047
1048 bool wxTextCtrl::CanPaste() const
1049 {
1050     if ( !IsEditable() )
1051         return FALSE;
1052
1053 #if wxUSE_RICHEDIT
1054     if ( IsRich() )
1055     {
1056         UINT cf = 0; // 0 == any format
1057
1058         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
1059     }
1060 #endif // wxUSE_RICHEDIT
1061
1062     // Standard edit control: check for straight text on clipboard
1063     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
1064         return FALSE;
1065
1066     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
1067     ::CloseClipboard();
1068
1069     return isTextAvailable;
1070 }
1071
1072 // ----------------------------------------------------------------------------
1073 // Accessors
1074 // ----------------------------------------------------------------------------
1075
1076 void wxTextCtrl::SetEditable(bool editable)
1077 {
1078     HWND hWnd = GetHwnd();
1079     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
1080 }
1081
1082 void wxTextCtrl::SetInsertionPoint(long pos)
1083 {
1084     DoSetSelection(pos, pos);
1085 }
1086
1087 void wxTextCtrl::SetInsertionPointEnd()
1088 {
1089     // we must not do anything if the caret is already there because calling
1090     // SetInsertionPoint() thaws the controls if Freeze() had been called even
1091     // if it doesn't actually move the caret anywhere and so the simple fact of
1092     // doing it results in horrible flicker when appending big amounts of text
1093     // to the control in a few chunks (see DoAddText() test in the text sample)
1094     if ( GetInsertionPoint() == GetLastPosition() )
1095         return;
1096
1097     long pos;
1098
1099 #if wxUSE_RICHEDIT
1100     if ( m_verRichEdit == 1 )
1101     {
1102         // we don't have to waste time calling GetLastPosition() in this case
1103         pos = -1;
1104     }
1105     else // !RichEdit 1.0
1106 #endif // wxUSE_RICHEDIT
1107     {
1108         pos = GetLastPosition();
1109     }
1110
1111     SetInsertionPoint(pos);
1112 }
1113
1114 long wxTextCtrl::GetInsertionPoint() const
1115 {
1116 #if wxUSE_RICHEDIT
1117     if ( IsRich() )
1118     {
1119         CHARRANGE range;
1120         range.cpMin = 0;
1121         range.cpMax = 0;
1122         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
1123         return range.cpMin;
1124     }
1125 #endif // wxUSE_RICHEDIT
1126
1127     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
1128     return Pos & 0xFFFF;
1129 }
1130
1131 long wxTextCtrl::GetLastPosition() const
1132 {
1133     int numLines = GetNumberOfLines();
1134     long posStartLastLine = XYToPosition(0, numLines - 1);
1135
1136     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
1137
1138     return posStartLastLine + lenLastLine;
1139 }
1140
1141 // If the return values from and to are the same, there is no
1142 // selection.
1143 void wxTextCtrl::GetSelection(long* from, long* to) const
1144 {
1145 #if wxUSE_RICHEDIT
1146     if ( IsRich() )
1147     {
1148         CHARRANGE charRange;
1149         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
1150
1151         *from = charRange.cpMin;
1152         *to = charRange.cpMax;
1153     }
1154     else
1155 #endif // !wxUSE_RICHEDIT
1156     {
1157         DWORD dwStart, dwEnd;
1158         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
1159
1160         *from = dwStart;
1161         *to = dwEnd;
1162     }
1163 }
1164
1165 bool wxTextCtrl::IsEditable() const
1166 {
1167     // strangely enough, we may be called before the control is created: our
1168     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
1169     // us
1170     if ( !m_hWnd )
1171         return TRUE;
1172
1173     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1174
1175     return (style & ES_READONLY) == 0;
1176 }
1177
1178 // ----------------------------------------------------------------------------
1179 // selection
1180 // ----------------------------------------------------------------------------
1181
1182 void wxTextCtrl::SetSelection(long from, long to)
1183 {
1184     // if from and to are both -1, it means (in wxWidgets) that all text should
1185     // be selected - translate into Windows convention
1186     if ( (from == -1) && (to == -1) )
1187     {
1188         from = 0;
1189         to = -1;
1190     }
1191
1192     DoSetSelection(from, to);
1193 }
1194
1195 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
1196 {
1197     HWND hWnd = GetHwnd();
1198
1199 #if wxUSE_RICHEDIT
1200     if ( IsRich() )
1201     {
1202         CHARRANGE range;
1203         range.cpMin = from;
1204         range.cpMax = to;
1205         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
1206     }
1207     else
1208 #endif // wxUSE_RICHEDIT
1209     {
1210         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
1211     }
1212
1213     if ( scrollCaret )
1214     {
1215 #if wxUSE_RICHEDIT
1216         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1217         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1218         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1219         // option is set (but it does work ok in richedit 1.0 mode...)
1220         //
1221         // so to make it work we either need to give focus to it here which
1222         // will probably create many problems (dummy focus events; window
1223         // containing the text control being brought to foreground
1224         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1225         // create other problems too -- and in fact it does because if we turn
1226         // on/off this style while appending the text to the control, the
1227         // vertical scrollbar never appears in it even if we append tons of
1228         // text and to work around this the only solution I found was to use
1229         // ES_DISABLENOSCROLL
1230         //
1231         // this is very ugly but I don't see any other way to make this work
1232         if ( GetRichVersion() > 1 )
1233         {
1234             if ( !HasFlag(wxTE_NOHIDESEL) )
1235             {
1236                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1237                               ECOOP_OR, ECO_NOHIDESEL);
1238             }
1239             //else: everything is already ok
1240         }
1241 #endif // wxUSE_RICHEDIT
1242
1243         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1244
1245 #if wxUSE_RICHEDIT
1246         // restore ECO_NOHIDESEL if we changed it
1247         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1248         {
1249             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1250                           ECOOP_AND, ~ECO_NOHIDESEL);
1251         }
1252 #endif // wxUSE_RICHEDIT
1253     }
1254 }
1255
1256 // ----------------------------------------------------------------------------
1257 // Working with files
1258 // ----------------------------------------------------------------------------
1259
1260 bool wxTextCtrl::LoadFile(const wxString& file)
1261 {
1262     if ( wxTextCtrlBase::LoadFile(file) )
1263     {
1264         // update the size limit if needed
1265         AdjustSpaceLimit();
1266
1267         return TRUE;
1268     }
1269
1270     return FALSE;
1271 }
1272
1273 // ----------------------------------------------------------------------------
1274 // Editing
1275 // ----------------------------------------------------------------------------
1276
1277 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1278 {
1279     // Set selection and remove it
1280     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
1281
1282     DoWriteText(value, TRUE /* selection only */);
1283 }
1284
1285 void wxTextCtrl::Remove(long from, long to)
1286 {
1287     Replace(from, to, wxEmptyString);
1288 }
1289
1290 bool wxTextCtrl::IsModified() const
1291 {
1292     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1293 }
1294
1295 void wxTextCtrl::MarkDirty()
1296 {
1297     SendMessage(GetHwnd(), EM_SETMODIFY, TRUE, 0L);
1298 }
1299
1300 void wxTextCtrl::DiscardEdits()
1301 {
1302     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1303 }
1304
1305 int wxTextCtrl::GetNumberOfLines() const
1306 {
1307     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1308 }
1309
1310 // ----------------------------------------------------------------------------
1311 // Positions <-> coords
1312 // ----------------------------------------------------------------------------
1313
1314 long wxTextCtrl::XYToPosition(long x, long y) const
1315 {
1316     // This gets the char index for the _beginning_ of this line
1317     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1318
1319     return charIndex + x;
1320 }
1321
1322 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1323 {
1324     HWND hWnd = GetHwnd();
1325
1326     // This gets the line number containing the character
1327     long lineNo;
1328 #if wxUSE_RICHEDIT
1329     if ( IsRich() )
1330     {
1331         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1332     }
1333     else
1334 #endif // wxUSE_RICHEDIT
1335     {
1336         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1337     }
1338
1339     if ( lineNo == -1 )
1340     {
1341         // no such line
1342         return FALSE;
1343     }
1344
1345     // This gets the char index for the _beginning_ of this line
1346     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1347     if ( charIndex == -1 )
1348     {
1349         return FALSE;
1350     }
1351
1352     // The X position must therefore be the different between pos and charIndex
1353     if ( x )
1354         *x = pos - charIndex;
1355     if ( y )
1356         *y = lineNo;
1357
1358     return TRUE;
1359 }
1360
1361 wxTextCtrlHitTestResult
1362 wxTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *col, wxTextCoord *row) const
1363 {
1364     // first get the position from Windows
1365     LPARAM lParam;
1366
1367 #if wxUSE_RICHEDIT
1368     POINTL ptl;
1369     if ( IsRich() )
1370     {
1371         // for rich edit controls the position is passed iva the struct fields
1372         ptl.x = pt.x;
1373         ptl.y = pt.y;
1374         lParam = (LPARAM)&ptl;
1375     }
1376     else
1377 #endif // wxUSE_RICHEDIT
1378     {
1379         // for the plain ones, we are limited to 16 bit positions which are
1380         // combined in a single 32 bit value
1381         lParam = MAKELPARAM(pt.x, pt.y);
1382     }
1383
1384     LRESULT pos = SendMessage(GetHwnd(), EM_CHARFROMPOS, 0, lParam);
1385
1386     if ( pos == -1 )
1387     {
1388         // this seems to indicate an error...
1389         return wxTE_HT_UNKNOWN;
1390     }
1391
1392 #if wxUSE_RICHEDIT
1393     if ( !IsRich() )
1394 #endif // wxUSE_RICHEDIT
1395     {
1396         // for plain EDIT controls the higher word contains something else
1397         pos = LOWORD(pos);
1398     }
1399
1400
1401     // next determine where it is relatively to our point: EM_CHARFROMPOS
1402     // always returns the closest character but we need to be more precise, so
1403     // double check that we really are where it pretends
1404     POINTL ptReal;
1405
1406 #if wxUSE_RICHEDIT
1407     // FIXME: we need to distinguish between richedit 2 and 3 here somehow but
1408     //        we don't know how to do it
1409     if ( IsRich() )
1410     {
1411         SendMessage(GetHwnd(), EM_POSFROMCHAR, (WPARAM)&ptReal, pos);
1412     }
1413     else
1414 #endif // wxUSE_RICHEDIT
1415     {
1416         LRESULT lRc = SendMessage(GetHwnd(), EM_POSFROMCHAR, pos, 0);
1417
1418         if ( lRc == -1 )
1419         {
1420             // this is apparently returned when pos corresponds to the last
1421             // position
1422             ptReal.x =
1423             ptReal.y = 0;
1424         }
1425         else
1426         {
1427             ptReal.x = LOWORD(lRc);
1428             ptReal.y = HIWORD(lRc);
1429         }
1430     }
1431
1432     wxTextCtrlHitTestResult rc;
1433
1434     if ( pt.y > ptReal.y + GetCharHeight() )
1435         rc = wxTE_HT_BELOW;
1436     else if ( pt.x > ptReal.x + GetCharWidth() )
1437         rc = wxTE_HT_BEYOND;
1438     else
1439         rc = wxTE_HT_ON_TEXT;
1440
1441     // finally translate to column/row
1442     if ( !PositionToXY(pos, col, row) )
1443     {
1444         wxFAIL_MSG( _T("PositionToXY() not expected to fail in HitTest()") );
1445     }
1446
1447     return rc;
1448 }
1449
1450 // ----------------------------------------------------------------------------
1451 //
1452 // ----------------------------------------------------------------------------
1453
1454 void wxTextCtrl::ShowPosition(long pos)
1455 {
1456     HWND hWnd = GetHwnd();
1457
1458     // To scroll to a position, we pass the number of lines and characters
1459     // to scroll *by*. This means that we need to:
1460     // (1) Find the line position of the current line.
1461     // (2) Find the line position of pos.
1462     // (3) Scroll by (pos - current).
1463     // For now, ignore the horizontal scrolling.
1464
1465     // Is this where scrolling is relative to - the line containing the caret?
1466     // Or is the first visible line??? Try first visible line.
1467 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1468
1469     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1470
1471     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1472
1473     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1474
1475     if (linesToScroll != 0)
1476       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1477 }
1478
1479 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1480 {
1481     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1482 }
1483
1484 int wxTextCtrl::GetLineLength(long lineNo) const
1485 {
1486     long pos = XYToPosition(0, lineNo);
1487
1488     return GetLengthOfLineContainingPos(pos);
1489 }
1490
1491 wxString wxTextCtrl::GetLineText(long lineNo) const
1492 {
1493     size_t len = (size_t)GetLineLength(lineNo) + 1;
1494
1495     // there must be at least enough place for the length WORD in the
1496     // buffer
1497     len += sizeof(WORD);
1498
1499     wxString str;
1500     {
1501         wxStringBufferLength tmp(str, len);
1502         wxChar *buf = tmp;
1503
1504         *(WORD *)buf = (WORD)len;
1505         len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1506
1507 #if wxUSE_RICHEDIT
1508         if ( IsRich() )
1509         {
1510             // remove the '\r' returned by the rich edit control, the user code
1511             // should never see it
1512             if ( buf[len - 2] == _T('\r') && buf[len - 1] == _T('\n') )
1513             {
1514                 buf[len - 2] = _T('\n');
1515                 len--;
1516             }
1517         }
1518 #endif // wxUSE_RICHEDIT
1519
1520         // remove the '\n' at the end, if any (this is how this function is
1521         // supposed to work according to the docs)
1522         if ( buf[len - 1] == _T('\n') )
1523         {
1524             len--;
1525         }
1526
1527         buf[len] = 0;
1528         tmp.SetLength(len);
1529     }
1530
1531     return str;
1532 }
1533
1534 void wxTextCtrl::SetMaxLength(unsigned long len)
1535 {
1536     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1537 }
1538
1539 // ----------------------------------------------------------------------------
1540 // Undo/redo
1541 // ----------------------------------------------------------------------------
1542
1543 void wxTextCtrl::Undo()
1544 {
1545     if (CanUndo())
1546     {
1547         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1548     }
1549 }
1550
1551 void wxTextCtrl::Redo()
1552 {
1553     if (CanRedo())
1554     {
1555         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1556         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1557     }
1558 }
1559
1560 bool wxTextCtrl::CanUndo() const
1561 {
1562     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1563 }
1564
1565 bool wxTextCtrl::CanRedo() const
1566 {
1567     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1568 }
1569
1570 // ----------------------------------------------------------------------------
1571 // caret handling (Windows only)
1572 // ----------------------------------------------------------------------------
1573
1574 bool wxTextCtrl::ShowNativeCaret(bool show)
1575 {
1576     if ( show != m_isNativeCaretShown )
1577     {
1578         if ( !(show ? ::ShowCaret(GetHwnd()) : ::HideCaret(GetHwnd())) )
1579         {
1580             // not an error, may simply indicate that it's not shown/hidden
1581             // yet (i.e. it had been hidden/showh 2 times before)
1582             return false;
1583         }
1584
1585         m_isNativeCaretShown = show;
1586     }
1587
1588     return true;
1589 }
1590
1591 // ----------------------------------------------------------------------------
1592 // implemenation details
1593 // ----------------------------------------------------------------------------
1594
1595 void wxTextCtrl::Command(wxCommandEvent & event)
1596 {
1597     SetValue(event.GetString());
1598     ProcessCommand (event);
1599 }
1600
1601 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1602 {
1603     // By default, load the first file into the text window.
1604     if (event.GetNumberOfFiles() > 0)
1605     {
1606         LoadFile(event.GetFiles()[0]);
1607     }
1608 }
1609
1610 // ----------------------------------------------------------------------------
1611 // kbd input processing
1612 // ----------------------------------------------------------------------------
1613
1614 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1615 {
1616     MSG *msg = (MSG *)pMsg;
1617
1618     // check for our special keys here: if we don't do it and the parent frame
1619     // uses them as accelerators, they wouldn't work at all, so we disable
1620     // usual preprocessing for them
1621     if ( msg->message == WM_KEYDOWN )
1622     {
1623         WORD vkey = (WORD) msg->wParam;
1624         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1625         {
1626             if ( vkey == VK_BACK )
1627                 return FALSE;
1628         }
1629         else // no Alt
1630         {
1631             // we want to process some Ctrl-foo and Shift-bar but no key
1632             // combinations without either Ctrl or Shift nor with both of them
1633             // pressed
1634             const int ctrl = wxIsCtrlDown(),
1635                       shift = wxIsShiftDown();
1636             switch ( ctrl + shift )
1637             {
1638                 default:
1639                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1640                     // fall through
1641
1642                 case 0:
1643                 case 2:
1644                     break;
1645
1646                 case 1:
1647                     // either Ctrl or Shift pressed
1648                     if ( ctrl )
1649                     {
1650                         switch ( vkey )
1651                         {
1652                             case 'C':
1653                             case 'V':
1654                             case 'X':
1655                             case VK_INSERT:
1656                             case VK_DELETE:
1657                             case VK_HOME:
1658                             case VK_END:
1659                                 return FALSE;
1660                         }
1661                     }
1662                     else // Shift is pressed
1663                     {
1664                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1665                             return FALSE;
1666                     }
1667             }
1668         }
1669     }
1670
1671     return wxControl::MSWShouldPreProcessMessage(pMsg);
1672 }
1673
1674 void wxTextCtrl::OnChar(wxKeyEvent& event)
1675 {
1676     switch ( event.GetKeyCode() )
1677     {
1678         case WXK_RETURN:
1679             if ( !HasFlag(wxTE_MULTILINE) )
1680             {
1681                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1682                 InitCommandEvent(event);
1683                 event.SetString(GetValue());
1684                 if ( GetEventHandler()->ProcessEvent(event) )
1685                     return;
1686             }
1687             //else: multiline controls need Enter for themselves
1688
1689             break;
1690
1691         case WXK_TAB:
1692             // ok, so this is getting absolutely ridiculous but I don't see
1693             // any other way to fix this bug: when a multiline text control is
1694             // inside a wxFrame, we need to generate the navigation event as
1695             // otherwise nothing happens at all, but when the same control is
1696             // created inside a dialog, IsDialogMessage() *does* switch focus
1697             // all by itself and so if we do it here as well, it is advanced
1698             // twice and goes to the next control... to prevent this from
1699             // happening we're doing this ugly check, the logic being that if
1700             // we don't have focus then it had been already changed to the next
1701             // control
1702             //
1703             // the right thing to do would, of course, be to understand what
1704             // the hell is IsDialogMessage() doing but this is beyond my feeble
1705             // forces at the moment unfortunately
1706             if ( !(m_windowStyle & wxTE_PROCESS_TAB))
1707             {
1708                 if ( FindFocus() == this )
1709                 {
1710                     int flags = 0;
1711                     if (!event.ShiftDown())
1712                         flags |= wxNavigationKeyEvent::IsForward ;
1713                     if (event.ControlDown())
1714                         flags |= wxNavigationKeyEvent::WinChange ;
1715                     if (Navigate(flags))
1716                         return;
1717                 }
1718             }
1719             else
1720             {
1721                 // Insert tab since calling the default Windows handler
1722                 // doesn't seem to do it
1723                 WriteText(wxT("\t"));
1724             }
1725             break;
1726     }
1727
1728     // no, we didn't process it
1729     event.Skip();
1730 }
1731
1732 WXLRESULT wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1733 {
1734     WXLRESULT lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1735
1736     if ( nMsg == WM_GETDLGCODE )
1737     {
1738         // we always want the chars and the arrows: the arrows for navigation
1739         // and the chars because we want Ctrl-C to work even in a read only
1740         // control
1741         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1742
1743         if ( IsEditable() )
1744         {
1745             // we may have several different cases:
1746             // 1. normal case: both TAB and ENTER are used for dlg navigation
1747             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1748             //    next control in the dialog
1749             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1750             //    navigation
1751             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1752             //    to the next control
1753
1754             // the multiline edit control should always get <Return> for itself
1755             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1756                 lDlgCode |= DLGC_WANTMESSAGE;
1757
1758             if ( HasFlag(wxTE_PROCESS_TAB) )
1759                 lDlgCode |= DLGC_WANTTAB;
1760
1761             lRc |= lDlgCode;
1762         }
1763         else // !editable
1764         {
1765             // NB: use "=", not "|=" as the base class version returns the
1766             //     same flags is this state as usual (i.e. including
1767             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1768             //     native Win32 apps?) but for now live with it.
1769             lRc = lDlgCode;
1770         }
1771     }
1772
1773     return lRc;
1774 }
1775
1776 // ----------------------------------------------------------------------------
1777 // text control event processing
1778 // ----------------------------------------------------------------------------
1779
1780 bool wxTextCtrl::SendUpdateEvent()
1781 {
1782     // is event reporting suspended?
1783     if ( m_suppressNextUpdate )
1784     {
1785         // do process the next one
1786         m_suppressNextUpdate = FALSE;
1787
1788         return FALSE;
1789     }
1790
1791     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1792     InitCommandEvent(event);
1793     event.SetString(GetValue());
1794
1795     return ProcessCommand(event);
1796 }
1797
1798 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1799 {
1800     switch ( param )
1801     {
1802         case EN_SETFOCUS:
1803         case EN_KILLFOCUS:
1804             {
1805                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1806                                                          : wxEVT_SET_FOCUS,
1807                                    m_windowId);
1808                 event.SetEventObject(this);
1809                 GetEventHandler()->ProcessEvent(event);
1810             }
1811             break;
1812
1813         case EN_CHANGE:
1814             SendUpdateEvent();
1815             break;
1816
1817         case EN_MAXTEXT:
1818             // the text size limit has been hit -- try to increase it
1819             if ( !AdjustSpaceLimit() )
1820             {
1821                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1822                 InitCommandEvent(event);
1823                 event.SetString(GetValue());
1824                 ProcessCommand(event);
1825             }
1826             break;
1827
1828             // the other edit notification messages are not processed
1829         default:
1830             return FALSE;
1831     }
1832
1833     // processed
1834     return TRUE;
1835 }
1836
1837 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1838 #if wxUSE_CTL3D
1839                                WXUINT message,
1840                                WXWPARAM wParam,
1841                                WXLPARAM lParam
1842 #else
1843                                WXUINT WXUNUSED(message),
1844                                WXWPARAM WXUNUSED(wParam),
1845                                WXLPARAM WXUNUSED(lParam)
1846 #endif
1847     )
1848 {
1849 #if wxUSE_CTL3D
1850     if ( m_useCtl3D )
1851     {
1852         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1853         return (WXHBRUSH) hbrush;
1854     }
1855 #endif // wxUSE_CTL3D
1856
1857     HDC hdc = (HDC)pDC;
1858     wxColour colBack = GetBackgroundColour();
1859
1860     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1861         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1862
1863     ::SetBkColor(hdc, wxColourToRGB(colBack));
1864     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1865
1866     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1867
1868     return (WXHBRUSH)brush->GetResourceHandle();
1869 }
1870
1871 bool wxTextCtrl::AdjustSpaceLimit()
1872 {
1873     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1874
1875     // HACK: we try to automatically extend the limit for the amount of text
1876     //       to allow (interactively) entering more than 64Kb of text under
1877     //       Win9x but we shouldn't reset the text limit which was previously
1878     //       set explicitly with SetMaxLength()
1879     //
1880     //       we could solve this by storing the limit we set in wxTextCtrl but
1881     //       to save space we prefer to simply test here the actual limit
1882     //       value: we consider that SetMaxLength() can only be called for
1883     //       values < 32Kb
1884     if ( limit < 0x8000 )
1885     {
1886         // we've got more text than limit set by SetMaxLength()
1887         return FALSE;
1888     }
1889
1890     unsigned int len = ::GetWindowTextLength(GetHwnd());
1891     if ( len >= limit )
1892     {
1893         limit = len + 0x8000;    // 32Kb
1894
1895 #if wxUSE_RICHEDIT
1896         if ( IsRich() )
1897         {
1898             // as a nice side effect, this also allows passing limit > 64Kb
1899             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1900         }
1901         else
1902 #endif // wxUSE_RICHEDIT
1903         {
1904             if ( limit > 0xffff )
1905             {
1906                 // this will set it to a platform-dependent maximum (much more
1907                 // than 64Kb under NT)
1908                 limit = 0;
1909             }
1910
1911             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1912         }
1913     }
1914
1915     // we changed the limit
1916     return TRUE;
1917 }
1918
1919 bool wxTextCtrl::AcceptsFocus() const
1920 {
1921     // we don't want focus if we can't be edited unless we're a multiline
1922     // control because then it might be still nice to get focus from keyboard
1923     // to be able to scroll it without mouse
1924     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1925 }
1926
1927 wxSize wxTextCtrl::DoGetBestSize() const
1928 {
1929     int cx, cy;
1930     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1931
1932     int wText = DEFAULT_ITEM_WIDTH;
1933
1934     int hText = cy;
1935     if ( m_windowStyle & wxTE_MULTILINE )
1936     {
1937         hText *= wxMax(GetNumberOfLines(), 5);
1938     }
1939     //else: for single line control everything is ok
1940
1941     // we have to add the adjustments for the control height only once, not
1942     // once per line, so do it after multiplication above
1943     hText += EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy) - cy;
1944
1945     return wxSize(wText, hText);
1946 }
1947
1948 // ----------------------------------------------------------------------------
1949 // standard handlers for standard edit menu events
1950 // ----------------------------------------------------------------------------
1951
1952 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1953 {
1954     Cut();
1955 }
1956
1957 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1958 {
1959     Copy();
1960 }
1961
1962 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1963 {
1964     Paste();
1965 }
1966
1967 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1968 {
1969     Undo();
1970 }
1971
1972 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1973 {
1974     Redo();
1975 }
1976
1977 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
1978 {
1979     long from, to;
1980     GetSelection(& from, & to);
1981     if (from != -1 && to != -1)
1982         Remove(from, to);
1983 }
1984
1985 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
1986 {
1987     SetSelection(-1, -1);
1988 }
1989
1990 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1991 {
1992     event.Enable( CanCut() );
1993 }
1994
1995 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1996 {
1997     event.Enable( CanCopy() );
1998 }
1999
2000 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2001 {
2002     event.Enable( CanPaste() );
2003 }
2004
2005 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2006 {
2007     event.Enable( CanUndo() );
2008 }
2009
2010 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2011 {
2012     event.Enable( CanRedo() );
2013 }
2014
2015 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
2016 {
2017     long from, to;
2018     GetSelection(& from, & to);
2019     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
2020 }
2021
2022 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2023 {
2024     event.Enable(GetLastPosition() > 0);
2025 }
2026
2027 void wxTextCtrl::OnRightClick(wxMouseEvent& event)
2028 {
2029 #if wxUSE_RICHEDIT
2030     if (IsRich())
2031     {
2032         if (!m_privateContextMenu)
2033         {
2034             m_privateContextMenu = new wxMenu;
2035             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
2036             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
2037             m_privateContextMenu->AppendSeparator();
2038             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
2039             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
2040             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
2041             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
2042             m_privateContextMenu->AppendSeparator();
2043             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
2044         }
2045         PopupMenu(m_privateContextMenu, event.GetPosition());
2046         return;
2047     }
2048     else
2049 #endif
2050     event.Skip();
2051 }
2052
2053 void wxTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
2054 {
2055     // be sure the caret remains invisible if the user had hidden it
2056     if ( !m_isNativeCaretShown )
2057     {
2058         ::HideCaret(GetHwnd());
2059     }
2060 }
2061
2062 // the rest of the file only deals with the rich edit controls
2063 #if wxUSE_RICHEDIT
2064
2065 // ----------------------------------------------------------------------------
2066 // EN_LINK processing
2067 // ----------------------------------------------------------------------------
2068
2069 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
2070 {
2071     NMHDR *hdr = (NMHDR* )lParam;
2072     switch ( hdr->code )
2073     {
2074        case EN_MSGFILTER:
2075             {
2076                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
2077                 UINT msg = msgf->msg;
2078
2079                 // this is a bit crazy but richedit 1.0 sends us all mouse
2080                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
2081                 // generate the wxWin events for this message manually
2082                 //
2083                 // NB: in fact, this is still not totally correct as it does
2084                 //     send us WM_LBUTTONUP if the selection was cleared by the
2085                 //     last click -- so currently we get 2 events in this case,
2086                 //     but as I don't see any obvious way to check for this I
2087                 //     leave this code in place because it's still better than
2088                 //     not getting left up events at all
2089                 if ( msg == WM_LBUTTONUP )
2090                 {
2091                     WXUINT flags = msgf->wParam;
2092                     int x = GET_X_LPARAM(msgf->lParam),
2093                         y = GET_Y_LPARAM(msgf->lParam);
2094
2095                     HandleMouseEvent(msg, x, y, flags);
2096                 }
2097             }
2098
2099             // return TRUE to process the event (and FALSE to ignore it)
2100             return TRUE;
2101
2102         case EN_LINK:
2103             {
2104                 const ENLINK *enlink = (ENLINK *)hdr;
2105
2106                 switch ( enlink->msg )
2107                 {
2108                     case WM_SETCURSOR:
2109                         // ok, so it is hardcoded - do we really nee to
2110                         // customize it?
2111                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
2112                         *result = TRUE;
2113                         break;
2114
2115                     case WM_MOUSEMOVE:
2116                     case WM_LBUTTONDOWN:
2117                     case WM_LBUTTONUP:
2118                     case WM_LBUTTONDBLCLK:
2119                     case WM_RBUTTONDOWN:
2120                     case WM_RBUTTONUP:
2121                     case WM_RBUTTONDBLCLK:
2122                         // send a mouse event
2123                         {
2124                             static const wxEventType eventsMouse[] =
2125                             {
2126                                 wxEVT_MOTION,
2127                                 wxEVT_LEFT_DOWN,
2128                                 wxEVT_LEFT_UP,
2129                                 wxEVT_LEFT_DCLICK,
2130                                 wxEVT_RIGHT_DOWN,
2131                                 wxEVT_RIGHT_UP,
2132                                 wxEVT_RIGHT_DCLICK,
2133                             };
2134
2135                             // the event ids are consecutive
2136                             wxMouseEvent
2137                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
2138
2139                             InitMouseEvent(evtMouse,
2140                                            GET_X_LPARAM(enlink->lParam),
2141                                            GET_Y_LPARAM(enlink->lParam),
2142                                            enlink->wParam);
2143
2144                             wxTextUrlEvent event(m_windowId, evtMouse,
2145                                                  enlink->chrg.cpMin,
2146                                                  enlink->chrg.cpMax);
2147
2148                             InitCommandEvent(event);
2149
2150                             *result = ProcessCommand(event);
2151                         }
2152                         break;
2153                 }
2154             }
2155             return TRUE;
2156     }
2157
2158     // not processed, leave it to the base class
2159     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
2160 }
2161
2162 // ----------------------------------------------------------------------------
2163 // colour setting for the rich edit controls
2164 // ----------------------------------------------------------------------------
2165
2166 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
2167 {
2168     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
2169     {
2170         // colour didn't really change
2171         return FALSE;
2172     }
2173
2174     if ( IsRich() )
2175     {
2176         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
2177         // EM_SETBKGNDCOLOR additionally
2178         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
2179     }
2180
2181     return TRUE;
2182 }
2183
2184 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
2185 {
2186     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
2187     {
2188         // colour didn't really change
2189         return FALSE;
2190     }
2191
2192     if ( IsRich() )
2193     {
2194         // change the colour of everything
2195         CHARFORMAT cf;
2196         wxZeroMemory(cf);
2197         cf.cbSize = sizeof(cf);
2198         cf.dwMask = CFM_COLOR;
2199         cf.crTextColor = wxColourToRGB(colour);
2200         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
2201     }
2202
2203     return TRUE;
2204 }
2205
2206 // ----------------------------------------------------------------------------
2207 // styling support for rich edit controls
2208 // ----------------------------------------------------------------------------
2209
2210 #if wxUSE_RICHEDIT
2211
2212 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2213 {
2214     if ( !IsRich() )
2215     {
2216         // can't do it with normal text control
2217         return FALSE;
2218     }
2219
2220     // the richedit 1.0 doesn't handle setting background colour, so don't
2221     // even try to do anything if it's the only thing we want to change
2222     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
2223         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
2224         !style.HasTabs() )
2225     {
2226         // nothing to do: return TRUE if there was really nothing to do and
2227         // FALSE if we failed to set bg colour
2228         return !style.HasBackgroundColour();
2229     }
2230
2231     // order the range if needed
2232     if ( start > end )
2233     {
2234         long tmp = start;
2235         start = end;
2236         end = tmp;
2237     }
2238
2239     // we can only change the format of the selection, so select the range we
2240     // want and restore the old selection later
2241     long startOld, endOld;
2242     GetSelection(&startOld, &endOld);
2243
2244     // but do we really have to change the selection?
2245     bool changeSel = start != startOld || end != endOld;
2246
2247     if ( changeSel )
2248     {
2249         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
2250     }
2251
2252     // initialize CHARFORMAT struct
2253 #if wxUSE_RICHEDIT2
2254     CHARFORMAT2 cf;
2255 #else
2256     CHARFORMAT cf;
2257 #endif
2258
2259     wxZeroMemory(cf);
2260
2261     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2262     // CHARFORMAT in that case
2263 #if wxUSE_RICHEDIT2
2264     if ( m_verRichEdit == 1 )
2265     {
2266         // this is the only thing the control is going to grok
2267         cf.cbSize = sizeof(CHARFORMAT);
2268     }
2269     else
2270 #endif
2271     {
2272         // CHARFORMAT or CHARFORMAT2
2273         cf.cbSize = sizeof(cf);
2274     }
2275
2276     if ( style.HasFont() )
2277     {
2278         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
2279         //     but using it doesn't seem to hurt neither so leaving it for now
2280
2281         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
2282                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
2283
2284         // fill in data from LOGFONT but recalculate lfHeight because we need
2285         // the real height in twips and not the negative number which
2286         // wxFillLogFont() returns (this is correct in general and works with
2287         // the Windows font mapper, but not here)
2288         LOGFONT lf;
2289         wxFillLogFont(&lf, &style.GetFont());
2290         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
2291         cf.bCharSet = lf.lfCharSet;
2292         cf.bPitchAndFamily = lf.lfPitchAndFamily;
2293         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
2294
2295         // also deal with underline/italic/bold attributes: note that we must
2296         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
2297         // style to allow clearing it
2298         if ( lf.lfItalic )
2299         {
2300             cf.dwEffects |= CFE_ITALIC;
2301         }
2302
2303         if ( lf.lfWeight == FW_BOLD )
2304         {
2305             cf.dwEffects |= CFE_BOLD;
2306         }
2307
2308         if ( lf.lfUnderline )
2309         {
2310             cf.dwEffects |= CFE_UNDERLINE;
2311         }
2312
2313         // strikeout fonts are not supported by wxWidgets
2314     }
2315
2316     if ( style.HasTextColour() )
2317     {
2318         cf.dwMask |= CFM_COLOR;
2319         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2320     }
2321
2322 #if wxUSE_RICHEDIT2
2323     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2324     {
2325         cf.dwMask |= CFM_BACKCOLOR;
2326         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2327     }
2328 #endif // wxUSE_RICHEDIT2
2329
2330     // do format the selection
2331     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
2332                             SCF_SELECTION, (LPARAM)&cf) != 0;
2333     if ( !ok )
2334     {
2335         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
2336     }
2337
2338     // now do the paragraph formatting
2339     PARAFORMAT2 pf;
2340     wxZeroMemory(pf);
2341     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2342     // PARAFORMAT in that case
2343 #if wxUSE_RICHEDIT2
2344     if ( m_verRichEdit == 1 )
2345     {
2346         // this is the only thing the control is going to grok
2347         pf.cbSize = sizeof(PARAFORMAT);
2348     }
2349     else
2350 #endif
2351     {
2352         // PARAFORMAT or PARAFORMAT2
2353         pf.cbSize = sizeof(pf);
2354     }
2355
2356     if (style.HasAlignment())
2357     {
2358         pf.dwMask |= PFM_ALIGNMENT;
2359         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2360             pf.wAlignment = PFA_RIGHT;
2361         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2362             pf.wAlignment = PFA_CENTER;
2363         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2364             pf.wAlignment = PFA_JUSTIFY;
2365         else
2366             pf.wAlignment = PFA_LEFT;
2367     }
2368
2369     if (style.HasLeftIndent())
2370     {
2371         pf.dwMask |= PFM_STARTINDENT | PFM_OFFSET;
2372
2373         // Convert from 1/10 mm to TWIPS
2374         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2375         pf.dxOffset = (int) (((double) style.GetLeftSubIndent()) * mm2twips / 10.0) ;
2376     }
2377
2378     if (style.HasRightIndent())
2379     {
2380         pf.dwMask |= PFM_RIGHTINDENT;
2381
2382         // Convert from 1/10 mm to TWIPS
2383         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2384     }
2385
2386     if (style.HasTabs())
2387     {
2388         pf.dwMask |= PFM_TABSTOPS;
2389
2390         const wxArrayInt& tabs = style.GetTabs();
2391
2392         pf.cTabCount = wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2393         size_t i;
2394         for (i = 0; i < (size_t) pf.cTabCount; i++)
2395         {
2396             // Convert from 1/10 mm to TWIPS
2397             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2398         }
2399     }
2400
2401     if (pf.dwMask != 0)
2402     {
2403         // do format the selection
2404         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2405             0, (LPARAM) &pf) != 0;
2406         if ( !ok )
2407         {
2408             wxLogDebug(_T("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2409         }
2410     }
2411
2412     if ( changeSel )
2413     {
2414         // restore the original selection
2415         DoSetSelection(startOld, endOld, FALSE);
2416     }
2417
2418     return ok;
2419 }
2420
2421 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2422 {
2423     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2424         return FALSE;
2425
2426     // we have to do this or the style wouldn't apply for the text typed by the
2427     // user
2428     long posLast = GetLastPosition();
2429     SetStyle(posLast, posLast, m_defaultStyle);
2430
2431     return TRUE;
2432 }
2433
2434 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2435 {
2436     if ( !IsRich() )
2437     {
2438         // can't do it with normal text control
2439         return FALSE;
2440     }
2441
2442     // initialize CHARFORMAT struct
2443 #if wxUSE_RICHEDIT2
2444     CHARFORMAT2 cf;
2445 #else
2446     CHARFORMAT cf;
2447 #endif
2448
2449     wxZeroMemory(cf);
2450
2451     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2452     // CHARFORMAT in that case
2453 #if wxUSE_RICHEDIT2
2454     if ( m_verRichEdit == 1 )
2455     {
2456         // this is the only thing the control is going to grok
2457         cf.cbSize = sizeof(CHARFORMAT);
2458     }
2459     else
2460 #endif
2461     {
2462         // CHARFORMAT or CHARFORMAT2
2463         cf.cbSize = sizeof(cf);
2464     }
2465     // we can only change the format of the selection, so select the range we
2466     // want and restore the old selection later
2467     long startOld, endOld;
2468     GetSelection(&startOld, &endOld);
2469
2470     // but do we really have to change the selection?
2471     bool changeSel = position != startOld || position != endOld;
2472
2473     if ( changeSel )
2474     {
2475         DoSetSelection(position, position, FALSE /* don't scroll caret into view */);
2476     }
2477
2478     // get the selection formatting
2479     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2480                             SCF_SELECTION, (LPARAM)&cf) ;
2481
2482     LOGFONT lf;
2483     lf.lfHeight = cf.yHeight;
2484     lf.lfWidth = 0;
2485     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2486     lf.lfClipPrecision = 0;
2487     lf.lfEscapement = 0;
2488     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2489     if (cf.dwEffects & CFE_ITALIC)
2490         lf.lfItalic = TRUE;
2491     lf.lfOrientation = 0;
2492     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2493     lf.lfQuality = 0;
2494     if (cf.dwEffects & CFE_STRIKEOUT)
2495         lf.lfStrikeOut = TRUE;
2496     if (cf.dwEffects & CFE_UNDERLINE)
2497         lf.lfUnderline = TRUE;
2498     if (cf.dwEffects & CFE_BOLD)
2499         lf.lfWeight = FW_BOLD;
2500
2501     wxFont font = wxCreateFontFromLogFont(& lf);
2502     if (font.Ok())
2503     {
2504         style.SetFont(font);
2505     }
2506     style.SetTextColour(wxColour(cf.crTextColor));
2507
2508 #if wxUSE_RICHEDIT2
2509     if ( m_verRichEdit != 1 )
2510     {
2511         // cf.dwMask |= CFM_BACKCOLOR;
2512         style.SetBackgroundColour(wxColour(cf.crBackColor));
2513     }
2514 #endif // wxUSE_RICHEDIT2
2515
2516     // now get the paragraph formatting
2517     PARAFORMAT2 pf;
2518     wxZeroMemory(pf);
2519     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2520     // PARAFORMAT in that case
2521 #if wxUSE_RICHEDIT2
2522     if ( m_verRichEdit == 1 )
2523     {
2524         // this is the only thing the control is going to grok
2525         pf.cbSize = sizeof(PARAFORMAT);
2526     }
2527     else
2528 #endif
2529     {
2530         // PARAFORMAT or PARAFORMAT2
2531         pf.cbSize = sizeof(pf);
2532     }
2533
2534     // do format the selection
2535     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2536
2537     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0), (int) ((double) pf.dxOffset * twips2mm * 10.0) );
2538     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2539
2540     if (pf.wAlignment == PFA_CENTER)
2541         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2542     else if (pf.wAlignment == PFA_RIGHT)
2543         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2544     else if (pf.wAlignment == PFA_JUSTIFY)
2545         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2546     else
2547         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2548
2549     wxArrayInt tabStops;
2550     size_t i;
2551     for (i = 0; i < (size_t) pf.cTabCount; i++)
2552     {
2553         tabStops.Add( (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) );
2554     }
2555
2556     if ( changeSel )
2557     {
2558         // restore the original selection
2559         DoSetSelection(startOld, endOld, FALSE);
2560     }
2561
2562     return TRUE;
2563 }
2564
2565 #endif
2566
2567 // ----------------------------------------------------------------------------
2568 // wxRichEditModule
2569 // ----------------------------------------------------------------------------
2570
2571 bool wxRichEditModule::OnInit()
2572 {
2573     // don't do anything - we will load it when needed
2574     return TRUE;
2575 }
2576
2577 void wxRichEditModule::OnExit()
2578 {
2579     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2580     {
2581         if ( ms_hRichEdit[i] )
2582         {
2583             ::FreeLibrary(ms_hRichEdit[i]);
2584             ms_hRichEdit[i] = NULL;
2585         }
2586     }
2587 }
2588
2589 /* static */
2590 bool wxRichEditModule::Load(int version)
2591 {
2592     // we don't support loading richedit 3.0 as I don't know how to distinguish
2593     // it from 2.0 anyhow
2594     wxCHECK_MSG( version == 1 || version == 2, FALSE,
2595                  _T("incorrect richedit control version requested") );
2596
2597     // make it the index in the array
2598     version--;
2599
2600     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2601     {
2602         // we had already tried to load it and failed
2603         return FALSE;
2604     }
2605
2606     if ( ms_hRichEdit[version] )
2607     {
2608         // we've already got this one
2609         return TRUE;
2610     }
2611
2612     wxString dllname = version ? _T("riched20") : _T("riched32");
2613     dllname += _T(".dll");
2614
2615     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2616
2617     if ( !ms_hRichEdit[version] )
2618     {
2619         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2620
2621         ms_hRichEdit[version] = (HINSTANCE)-1;
2622
2623         return FALSE;
2624     }
2625
2626     return TRUE;
2627 }
2628
2629 #endif // wxUSE_RICHEDIT
2630
2631 #endif // wxUSE_TEXTCTRL