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 and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 #ifdef __GNUG__
  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 #endif
  42
  43 #include "wx/module.h"
  44
  45 #if wxUSE_CLIPBOARD
  46     #include "wx/clipbrd.h"
  47 #endif
  48
  49 #include "wx/textfile.h"
  50
  51 #include <windowsx.h>
  52
  53 #include "wx/msw/private.h"
  54
  55 #include <string.h>
  56 #include <stdlib.h>
  57 #include <sys/types.h>
  58
  59 #if wxUSE_RICHEDIT && (!defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__))
  60     #include <richedit.h>
  61 #endif
  62
  63 // old mingw32 doesn't define this
  64 #ifndef CFM_CHARSET
  65     #define CFM_CHARSET 0x08000000
  66 #endif // CFM_CHARSET
  67
  68 #ifndef CFM_BACKCOLOR
  69     #define CFM_BACKCOLOR 0x04000000
  70 #endif
  71
  72 // cygwin does not have these defined for richedit
  73 #ifndef ENM_LINK
  74     #define ENM_LINK 0x04000000
  75 #endif
  76
  77 #ifndef EM_AUTOURLDETECT
  78     #define EM_AUTOURLDETECT (WM_USER + 91)
  79 #endif
  80
  81 #ifndef EN_LINK
  82     #define EN_LINK 0x070b
  83
  84     typedef struct _enlink
  85     {
  86         NMHDR nmhdr;
  87         UINT msg;
  88         WPARAM wParam;
  89         LPARAM lParam;
  90         CHARRANGE chrg;
  91     } ENLINK;
  92 #endif // ENLINK
  93
  94 // ----------------------------------------------------------------------------
  95 // private classes
  96 // ----------------------------------------------------------------------------
  97
  98 #if wxUSE_RICHEDIT
  99
 100 // this module initializes RichEdit DLL if needed
 101 class wxRichEditModule : public wxModule
 102 {
 103 public:
 104     virtual bool OnInit();
 105     virtual void OnExit();
 106
 107     // get the version currently loaded, -1 if none
 108     static int GetLoadedVersion() { return ms_verRichEdit; }
 109
 110     // load the richedit DLL of at least of required version
 111     static bool Load(int version = 1);
 112
 113 private:
 114     // the handle to richedit DLL and the version of the DLL loaded
 115     static HINSTANCE ms_hRichEdit;
 116
 117     // the DLL version loaded or -1 if none
 118     static int ms_verRichEdit;
 119
 120     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 121 };
 122
 123 HINSTANCE wxRichEditModule::ms_hRichEdit = (HINSTANCE)NULL;
 124 int       wxRichEditModule::ms_verRichEdit = -1;
 125
 126 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 127
 128 #endif // wxUSE_RICHEDIT
 129
 130 // ----------------------------------------------------------------------------
 131 // event tables and other macros
 132 // ----------------------------------------------------------------------------
 133
 134 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 135
 136 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 137     EVT_CHAR(wxTextCtrl::OnChar)
 138     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 139
 140     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 141     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 142     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 143     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 144     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 145
 146     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 147     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 148     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 149     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 150     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 151 #ifdef __WIN16__
 152     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 153 #endif
 154 END_EVENT_TABLE()
 155
 156 // ============================================================================
 157 // implementation
 158 // ============================================================================
 159
 160 // ----------------------------------------------------------------------------
 161 // creation
 162 // ----------------------------------------------------------------------------
 163
 164 wxTextCtrl::wxTextCtrl()
 165 {
 166 #if wxUSE_RICHEDIT
 167     m_isRich = FALSE;
 168 #endif
 169 }
 170
 171 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 172                         const wxString& value,
 173                         const wxPoint& pos,
 174                         const wxSize& size,
 175                         long style,
 176                         const wxValidator& validator,
 177                         const wxString& name)
 178 {
 179     // base initialization
 180     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 181         return FALSE;
 182
 183     if ( parent )
 184         parent->AddChild(this);
 185
 186     // translate wxWin style flags to MSW ones, checking for consistency while
 187     // doing it
 188     long msStyle = ES_LEFT | WS_TABSTOP;
 189
 190     if ( m_windowStyle & wxCLIP_SIBLINGS )
 191         msStyle |= WS_CLIPSIBLINGS;
 192
 193     if ( m_windowStyle & wxTE_MULTILINE )
 194     {
 195         wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 196                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 197
 198         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 199         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 200             msStyle |= WS_VSCROLL;
 201         m_windowStyle |= wxTE_PROCESS_ENTER;
 202     }
 203     else // !multiline
 204     {
 205         // there is really no reason to not have this style for single line
 206         // text controls
 207         msStyle |= ES_AUTOHSCROLL;
 208     }
 209
 210     if ( m_windowStyle & wxHSCROLL )
 211         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 212
 213     if ( m_windowStyle & wxTE_READONLY )
 214         msStyle |= ES_READONLY;
 215
 216     if ( m_windowStyle & wxTE_PASSWORD )
 217         msStyle |= ES_PASSWORD;
 218
 219     if ( m_windowStyle & wxTE_AUTO_SCROLL )
 220         msStyle |= ES_AUTOHSCROLL;
 221
 222     if ( m_windowStyle & wxTE_NOHIDESEL )
 223         msStyle |= ES_NOHIDESEL;
 224
 225     // we always want the characters and the arrows
 226     m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
 227
 228     // we may have several different cases:
 229     // 1. normal case: both TAB and ENTER are used for dialog navigation
 230     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
 231     //    control in the dialog
 232     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
 233     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
 234     //    the next control
 235     if ( m_windowStyle & wxTE_PROCESS_ENTER )
 236         m_lDlgCode |= DLGC_WANTMESSAGE;
 237     if ( m_windowStyle & wxTE_PROCESS_TAB )
 238         m_lDlgCode |= DLGC_WANTTAB;
 239
 240     // do create the control - either an EDIT or RICHEDIT
 241     wxString windowClass = wxT("EDIT");
 242
 243 #if wxUSE_RICHEDIT
 244     if ( m_windowStyle & wxTE_RICH )
 245     {
 246         static bool s_errorGiven = FALSE;   // MT-FIXME
 247
 248         // only give the error msg once if the DLL can't be loaded
 249         if ( !s_errorGiven )
 250         {
 251             // first try to load the RichEdit DLL (will do nothing if already
 252             // done)
 253             if ( !wxRichEditModule::Load() )
 254             {
 255                 wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 256
 257                 s_errorGiven = TRUE;
 258             }
 259         }
 260
 261         if ( s_errorGiven )
 262         {
 263             m_isRich = FALSE;
 264         }
 265         else
 266         {
 267             msStyle |= ES_AUTOVSCROLL;
 268             // Experimental: this seems to help with the scroll problem. See messages from Jekabs Andrushaitis <j.andrusaitis@konts.lv>
 269             // wx-dev list, entitled "[wx-dev] wxMSW-EVT_KEY_DOWN and wxMSW-wxTextCtrl" and "[wx-dev] TextCtrl (RichEdit)"
 270             // Unfortunately, showing the selection in blue when the control doesn't have
 271             // the focus is non-standard behaviour, and we need to find another workaround.
 272             //msStyle |= ES_NOHIDESEL ;
 273             m_isRich = TRUE;
 274
 275             int ver = wxRichEditModule::GetLoadedVersion();
 276             if ( ver == 1 )
 277             {
 278                 windowClass = wxT("RICHEDIT");
 279             }
 280             else
 281             {
 282 #ifndef RICHEDIT_CLASS
 283                 wxString RICHEDIT_CLASS;
 284                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), ver);
 285 #if wxUSE_UNICODE
 286                 RICHEDIT_CLASS += _T('W');
 287 #else // ANSI
 288                 RICHEDIT_CLASS += _T('A');
 289 #endif // Unicode/ANSI
 290 #endif // !RICHEDIT_CLASS
 291
 292                 windowClass = RICHEDIT_CLASS;
 293             }
 294         }
 295     }
 296     else
 297         m_isRich = FALSE;
 298 #endif // wxUSE_RICHEDIT
 299
 300     // we need to turn '\n's into "\r\n"s for the multiline controls
 301     wxString valueWin;
 302     if ( m_windowStyle & wxTE_MULTILINE )
 303     {
 304         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 305     }
 306     else // single line
 307     {
 308         valueWin = value;
 309     }
 310
 311     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 312         return FALSE;
 313
 314     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 315
 316 #if wxUSE_RICHEDIT
 317     if (m_isRich)
 318     {
 319         // have to enable events manually
 320         LPARAM mask = ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE;
 321
 322         if ( m_windowStyle & wxTE_AUTO_URL )
 323         {
 324             mask |= ENM_LINK;
 325
 326             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 327         }
 328
 329         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 330     }
 331 #endif // wxUSE_RICHEDIT
 332
 333     return TRUE;
 334 }
 335
 336 // Make sure the window style (etc.) reflects the HWND style (roughly)
 337 void wxTextCtrl::AdoptAttributesFromHWND()
 338 {
 339   wxWindow::AdoptAttributesFromHWND();
 340
 341   HWND hWnd = GetHwnd();
 342   long style = GetWindowLong(hWnd, GWL_STYLE);
 343
 344   // retrieve the style to see whether this is an edit or richedit ctrl
 345 #if wxUSE_RICHEDIT
 346   wxChar buf[256];
 347
 348   GetClassName(hWnd, buf, WXSIZEOF(buf));
 349
 350   if ( wxStricmp(buf, wxT("EDIT")) == 0 )
 351     m_isRich = FALSE;
 352   else
 353     m_isRich = TRUE;
 354 #endif // wxUSE_RICHEDIT
 355
 356   if (style & ES_MULTILINE)
 357     m_windowStyle |= wxTE_MULTILINE;
 358   if (style & ES_PASSWORD)
 359     m_windowStyle |= wxTE_PASSWORD;
 360   if (style & ES_READONLY)
 361     m_windowStyle |= wxTE_READONLY;
 362   if (style & ES_WANTRETURN)
 363     m_windowStyle |= wxTE_PROCESS_ENTER;
 364 }
 365
 366 // ----------------------------------------------------------------------------
 367 // set/get the controls text
 368 // ----------------------------------------------------------------------------
 369
 370 wxString wxTextCtrl::GetValue() const
 371 {
 372     // we can't use wxGetWindowText() (i.e. WM_GETTEXT internally) for
 373     // retrieving more than 64Kb under Win9x
 374 #if wxUSE_RICHEDIT
 375     if ( m_isRich )
 376     {
 377         wxString str;
 378
 379         int len = GetWindowTextLength(GetHwnd());
 380         if ( len )
 381         {
 382             // alloc one extra WORD as needed by the control
 383             wxChar *p = str.GetWriteBuf(++len);
 384
 385             TEXTRANGE textRange;
 386             textRange.chrg.cpMin = 0;
 387             textRange.chrg.cpMax = -1;
 388             textRange.lpstrText = p;
 389
 390             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 391
 392             // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for
 393             // the newlines which is neither Unix nor Windows style (Win95 with
 394             // riched20.dll shows this behaviour) - convert it to something
 395             // reasonable
 396             for ( ; *p; p++ )
 397             {
 398                 if ( *p == _T('\r') )
 399                     *p = _T('\n');
 400             }
 401
 402             str.UngetWriteBuf();
 403         }
 404         //else: no text at all, leave the string empty
 405
 406         return str;
 407     }
 408 #endif // wxUSE_RICHEDIT
 409
 410     // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 411     // same one as above for consitency
 412     wxString str = wxGetWindowText(GetHWND());
 413
 414     return wxTextFile::Translate(str, wxTextFileType_Unix);
 415 }
 416
 417 void wxTextCtrl::SetValue(const wxString& value)
 418 {
 419     // if the text is long enough, it's faster to just set it instead of first
 420     // comparing it with the old one (chances are that it will be different
 421     // anyhow, this comparison is there to avoid flicker for small single-line
 422     // edit controls mostly)
 423     if ( (value.length() > 0x400) || (value != GetValue()) )
 424     {
 425         wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 426
 427         SetWindowText(GetHwnd(), valueDos.c_str());
 428
 429         // for compatibility with the GTK and because it is more logical, we
 430         // move the cursor to the end of the text after SetValue()
 431
 432         // GRG, Jun/2000: Changed this back after a lot of discussion
 433         //   in the lists. wxWindows 2.2 will have a set of flags to
 434         //   customize this behaviour.
 435         //SetInsertionPointEnd();
 436
 437         AdjustSpaceLimit();
 438     }
 439 }
 440
 441 void wxTextCtrl::WriteText(const wxString& value)
 442 {
 443     wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 444
 445 #if wxUSE_RICHEDIT
 446     // ensure that the new text will be in the default style
 447     if ( IsRich() &&
 448             (m_defaultStyle.HasFont() || m_defaultStyle.HasTextColour()) )
 449     {
 450         long start, end;
 451         GetSelection(&start, &end);
 452         SetStyle(start, end, m_defaultStyle );
 453     }
 454 #endif // wxUSE_RICHEDIT
 455
 456     SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 457
 458     AdjustSpaceLimit();
 459 }
 460
 461 void wxTextCtrl::AppendText(const wxString& text)
 462 {
 463     SetInsertionPointEnd();
 464     WriteText(text);
 465 }
 466
 467 void wxTextCtrl::Clear()
 468 {
 469     SetWindowText(GetHwnd(), wxT(""));
 470 }
 471
 472 // ----------------------------------------------------------------------------
 473 // Clipboard operations
 474 // ----------------------------------------------------------------------------
 475
 476 void wxTextCtrl::Copy()
 477 {
 478     if (CanCopy())
 479     {
 480         HWND hWnd = GetHwnd();
 481         SendMessage(hWnd, WM_COPY, 0, 0L);
 482     }
 483 }
 484
 485 void wxTextCtrl::Cut()
 486 {
 487     if (CanCut())
 488     {
 489         HWND hWnd = GetHwnd();
 490         SendMessage(hWnd, WM_CUT, 0, 0L);
 491     }
 492 }
 493
 494 void wxTextCtrl::Paste()
 495 {
 496     if (CanPaste())
 497     {
 498         HWND hWnd = GetHwnd();
 499         SendMessage(hWnd, WM_PASTE, 0, 0L);
 500     }
 501 }
 502
 503 bool wxTextCtrl::CanCopy() const
 504 {
 505     // Can copy if there's a selection
 506     long from, to;
 507     GetSelection(& from, & to);
 508     return (from != to) ;
 509 }
 510
 511 bool wxTextCtrl::CanCut() const
 512 {
 513     // Can cut if there's a selection
 514     long from, to;
 515     GetSelection(& from, & to);
 516     return (from != to) && (IsEditable());
 517 }
 518
 519 bool wxTextCtrl::CanPaste() const
 520 {
 521 #if wxUSE_RICHEDIT
 522     if (m_isRich)
 523     {
 524         int dataFormat = 0; // 0 == any format
 525         return (::SendMessage( GetHwnd(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 526     }
 527 #endif
 528     if (!IsEditable())
 529         return FALSE;
 530
 531     // Standard edit control: check for straight text on clipboard
 532     bool isTextAvailable = FALSE;
 533     if ( ::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 534     {
 535         isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
 536         ::CloseClipboard();
 537     }
 538
 539     return isTextAvailable;
 540 }
 541
 542 // ----------------------------------------------------------------------------
 543 // Accessors
 544 // ----------------------------------------------------------------------------
 545
 546 void wxTextCtrl::SetEditable(bool editable)
 547 {
 548     HWND hWnd = GetHwnd();
 549     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 550 }
 551
 552 void wxTextCtrl::SetInsertionPoint(long pos)
 553 {
 554     HWND hWnd = GetHwnd();
 555 #ifdef __WIN32__
 556 #if wxUSE_RICHEDIT
 557     if ( m_isRich)
 558     {
 559         CHARRANGE range;
 560         range.cpMin = pos;
 561         range.cpMax = pos;
 562         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 563         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 564     }
 565     else
 566 #endif // wxUSE_RICHEDIT
 567     {
 568         SendMessage(hWnd, EM_SETSEL, pos, pos);
 569         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 570     }
 571 #else // Win16
 572     SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 573 #endif // Win32/16
 574
 575 #if wxUSE_RICHEDIT
 576     if ( !m_isRich)
 577 #endif
 578     {
 579         static const wxChar *nothing = _T("");
 580         SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 581     }
 582 }
 583
 584 void wxTextCtrl::SetInsertionPointEnd()
 585 {
 586     long pos = GetLastPosition();
 587     SetInsertionPoint(pos);
 588 }
 589
 590 long wxTextCtrl::GetInsertionPoint() const
 591 {
 592 #if wxUSE_RICHEDIT
 593     if (m_isRich)
 594     {
 595         CHARRANGE range;
 596         range.cpMin = 0;
 597         range.cpMax = 0;
 598         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 599         return range.cpMin;
 600     }
 601 #endif
 602
 603     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 604     return Pos & 0xFFFF;
 605 }
 606
 607 long wxTextCtrl::GetLastPosition() const
 608 {
 609     HWND hWnd = GetHwnd();
 610
 611     // Will always return a number > 0 (according to docs)
 612     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 613
 614     // This gets the char index for the _beginning_ of the last line
 615     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 616
 617     // Get number of characters in the last line. We'll add this to the character
 618     // index for the last line, 1st position.
 619     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 620
 621     return (long)(charIndex + lineLength);
 622 }
 623
 624 // If the return values from and to are the same, there is no
 625 // selection.
 626 void wxTextCtrl::GetSelection(long* from, long* to) const
 627 {
 628 #if wxUSE_RICHEDIT
 629     if (m_isRich)
 630     {
 631         CHARRANGE charRange;
 632         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 633
 634         *from = charRange.cpMin;
 635         *to = charRange.cpMax;
 636     }
 637     else
 638 #endif // rich/!rich
 639     {
 640         DWORD dwStart, dwEnd;
 641         WPARAM wParam = (WPARAM) &dwStart; // receives starting position
 642         LPARAM lParam = (LPARAM) &dwEnd;   // receives ending position
 643
 644         ::SendMessage(GetHwnd(), EM_GETSEL, wParam, lParam);
 645
 646         *from = dwStart;
 647         *to = dwEnd;
 648     }
 649 }
 650
 651 wxString wxTextCtrl::GetStringSelection() const
 652 {
 653     // the base class version works correctly for the rich text controls
 654     // because there the lines are terminated with just '\r' which means that
 655     // the string length is not changed in the result of the translations doen
 656     // in GetValue() but for the normal ones when we replace "\r\n" with '\n'
 657     // we break the indices
 658 #if wxUSE_RICHEDIT
 659     if ( m_isRich )
 660         return wxTextCtrlBase::GetStringSelection();
 661 #endif // wxUSE_RICHEDIT
 662
 663     long from, to;
 664     GetSelection(&from, &to);
 665
 666     wxString str;
 667     if ( from < to )
 668     {
 669         str = wxGetWindowText(GetHWND()).Mid(from, to - from);
 670
 671         // and now that we have the correct selection, convert it to the
 672         // correct format
 673         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 674     }
 675
 676     return str;
 677 }
 678
 679 bool wxTextCtrl::IsEditable() const
 680 {
 681     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 682
 683     return ((style & ES_READONLY) == 0);
 684 }
 685
 686 // ----------------------------------------------------------------------------
 687 // Editing
 688 // ----------------------------------------------------------------------------
 689
 690 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 691 {
 692     HWND hWnd = GetHwnd();
 693     long fromChar = from;
 694     long toChar = to;
 695
 696     // Set selection and remove it
 697 #ifdef __WIN32__
 698     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 699     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)TRUE, (LPARAM)value.c_str());
 700 #else
 701     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 702     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)0, (LPARAM)value.c_str());
 703 #endif
 704 }
 705
 706 void wxTextCtrl::Remove(long from, long to)
 707 {
 708     HWND hWnd = GetHwnd();
 709     long fromChar = from;
 710     long toChar = to;
 711
 712     // Cut all selected text
 713 #ifdef __WIN32__
 714     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 715     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)TRUE, (LPARAM)"");
 716 #else
 717     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 718     SendMessage(hWnd, EM_REPLACESEL, (WPARAM)0, (LPARAM)"");
 719 #endif
 720 }
 721
 722 void wxTextCtrl::SetSelection(long from, long to)
 723 {
 724     HWND hWnd = GetHwnd();
 725     long fromChar = from;
 726     long toChar = to;
 727
 728     // if from and to are both -1, it means (in wxWindows) that all text should
 729     // be selected. Translate into Windows convention
 730     if ((from == -1) && (to == -1))
 731     {
 732       fromChar = 0;
 733       toChar = -1;
 734     }
 735
 736 #ifdef __WIN32__
 737     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 738     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 739 #else
 740     // WPARAM is 0: selection is scrolled into view
 741     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 742 #endif
 743 }
 744
 745 bool wxTextCtrl::LoadFile(const wxString& file)
 746 {
 747     if ( wxTextCtrlBase::LoadFile(file) )
 748     {
 749         // update the size limit if needed
 750         AdjustSpaceLimit();
 751
 752         return TRUE;
 753     }
 754
 755     return FALSE;
 756 }
 757
 758 bool wxTextCtrl::IsModified() const
 759 {
 760     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 761 }
 762
 763 // Makes 'unmodified'
 764 void wxTextCtrl::DiscardEdits()
 765 {
 766     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 767 }
 768
 769 int wxTextCtrl::GetNumberOfLines() const
 770 {
 771     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 772 }
 773
 774 long wxTextCtrl::XYToPosition(long x, long y) const
 775 {
 776     HWND hWnd = GetHwnd();
 777
 778     // This gets the char index for the _beginning_ of this line
 779     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 780     return (long)(x + charIndex);
 781 }
 782
 783 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 784 {
 785     HWND hWnd = GetHwnd();
 786
 787     // This gets the line number containing the character
 788     int lineNo;
 789 #if wxUSE_RICHEDIT
 790     if ( m_isRich )
 791     {
 792         lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 793     }
 794     else
 795 #endif // wxUSE_RICHEDIT
 796         lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 797
 798     if ( lineNo == -1 )
 799     {
 800         // no such line
 801         return FALSE;
 802     }
 803
 804     // This gets the char index for the _beginning_ of this line
 805     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 806     if ( charIndex == -1 )
 807     {
 808         return FALSE;
 809     }
 810
 811     // The X position must therefore be the different between pos and charIndex
 812     if ( x )
 813         *x = (long)(pos - charIndex);
 814     if ( y )
 815         *y = (long)lineNo;
 816
 817     return TRUE;
 818 }
 819
 820 void wxTextCtrl::ShowPosition(long pos)
 821 {
 822     HWND hWnd = GetHwnd();
 823
 824     // To scroll to a position, we pass the number of lines and characters
 825     // to scroll *by*. This means that we need to:
 826     // (1) Find the line position of the current line.
 827     // (2) Find the line position of pos.
 828     // (3) Scroll by (pos - current).
 829     // For now, ignore the horizontal scrolling.
 830
 831     // Is this where scrolling is relative to - the line containing the caret?
 832     // Or is the first visible line??? Try first visible line.
 833 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 834
 835     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 836
 837     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 838
 839     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 840
 841     if (linesToScroll != 0)
 842       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 843 }
 844
 845 int wxTextCtrl::GetLineLength(long lineNo) const
 846 {
 847     long charIndex = XYToPosition(0, lineNo);
 848     int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
 849     return len;
 850 }
 851
 852 wxString wxTextCtrl::GetLineText(long lineNo) const
 853 {
 854     size_t len = (size_t)GetLineLength(lineNo) + 1;
 855
 856     // there must be at least enough place for the length WORD in the
 857     // buffer
 858     len += sizeof(WORD);
 859
 860     wxString str;
 861     wxChar *buf = str.GetWriteBuf(len);
 862
 863     *(WORD *)buf = (WORD)len;
 864     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
 865     buf[len] = 0;
 866
 867     str.UngetWriteBuf(len);
 868
 869     return str;
 870 }
 871
 872 void wxTextCtrl::SetMaxLength(unsigned long len)
 873 {
 874     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
 875 }
 876
 877 // ----------------------------------------------------------------------------
 878 // Undo/redo
 879 // ----------------------------------------------------------------------------
 880
 881 void wxTextCtrl::Undo()
 882 {
 883     if (CanUndo())
 884     {
 885         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 886     }
 887 }
 888
 889 void wxTextCtrl::Redo()
 890 {
 891     if (CanRedo())
 892     {
 893         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 894         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 895     }
 896 }
 897
 898 bool wxTextCtrl::CanUndo() const
 899 {
 900     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 901 }
 902
 903 bool wxTextCtrl::CanRedo() const
 904 {
 905     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 906 }
 907
 908 // ----------------------------------------------------------------------------
 909 // implemenation details
 910 // ----------------------------------------------------------------------------
 911
 912 void wxTextCtrl::Command(wxCommandEvent & event)
 913 {
 914     SetValue(event.GetString());
 915     ProcessCommand (event);
 916 }
 917
 918 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 919 {
 920     // By default, load the first file into the text window.
 921     if (event.GetNumberOfFiles() > 0)
 922     {
 923         LoadFile(event.GetFiles()[0]);
 924     }
 925 }
 926
 927 // ----------------------------------------------------------------------------
 928 // kbd input processing
 929 // ----------------------------------------------------------------------------
 930
 931 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
 932 {
 933     MSG *msg = (MSG *)pMsg;
 934
 935     // check for our special keys here: if we don't do it and the parent frame
 936     // uses them as accelerators, they wouldn't work at all, so we disable
 937     // usual preprocessing for them
 938     if ( msg->message == WM_KEYDOWN )
 939     {
 940         WORD vkey = msg->wParam;
 941         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
 942         {
 943             if ( vkey == VK_BACK )
 944                 return FALSE;
 945         }
 946         else // no Alt
 947         {
 948             if ( wxIsCtrlDown() )
 949             {
 950                 switch ( vkey )
 951                 {
 952                     case 'C':
 953                     case 'V':
 954                     case 'X':
 955                     case VK_INSERT:
 956                     case VK_DELETE:
 957                     case VK_HOME:
 958                     case VK_END:
 959                         return FALSE;
 960                 }
 961             }
 962             else if ( wxIsShiftDown() )
 963             {
 964                 if ( vkey == VK_INSERT || vkey == VK_DELETE )
 965                     return FALSE;
 966             }
 967         }
 968     }
 969
 970     return wxControl::MSWShouldPreProcessMessage(pMsg);
 971 }
 972
 973 void wxTextCtrl::OnChar(wxKeyEvent& event)
 974 {
 975     switch ( event.KeyCode() )
 976     {
 977         case WXK_RETURN:
 978             if ( !(m_windowStyle & wxTE_MULTILINE) )
 979             {
 980                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 981                 InitCommandEvent(event);
 982                 event.SetString(GetValue());
 983                 if ( GetEventHandler()->ProcessEvent(event) )
 984                     return;
 985             }
 986             //else: multiline controls need Enter for themselves
 987
 988             break;
 989
 990         case WXK_TAB:
 991             // always produce navigation event - even if we process TAB
 992             // ourselves the fact that we got here means that the user code
 993             // decided to skip processing of this TAB - probably to let it
 994             // do its default job.
 995             {
 996                 wxNavigationKeyEvent eventNav;
 997                 eventNav.SetDirection(!event.ShiftDown());
 998                 eventNav.SetWindowChange(event.ControlDown());
 999                 eventNav.SetEventObject(this);
1000
1001                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1002                     return;
1003             }
1004             break;
1005     }
1006
1007     // no, we didn't process it
1008     event.Skip();
1009 }
1010
1011 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1012 {
1013     switch (param)
1014     {
1015         case EN_SETFOCUS:
1016         case EN_KILLFOCUS:
1017             {
1018                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1019                                                          : wxEVT_SET_FOCUS,
1020                                    m_windowId);
1021                 event.SetEventObject( this );
1022                 GetEventHandler()->ProcessEvent(event);
1023             }
1024             break;
1025
1026         case EN_CHANGE:
1027             {
1028                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1029                 InitCommandEvent(event);
1030                 event.SetString(GetValue());
1031                 ProcessCommand(event);
1032             }
1033             break;
1034
1035         case EN_MAXTEXT:
1036             // the text size limit has been hit - increase it
1037             if ( !AdjustSpaceLimit() )
1038             {
1039                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1040                 InitCommandEvent(event);
1041                 event.SetString(GetValue());
1042                 ProcessCommand(event);
1043             }
1044             break;
1045
1046             // the other notification messages are not processed
1047         case EN_UPDATE:
1048         case EN_ERRSPACE:
1049         case EN_HSCROLL:
1050         case EN_VSCROLL:
1051             return FALSE;
1052         default:
1053             return FALSE;
1054     }
1055
1056     // processed
1057     return TRUE;
1058 }
1059
1060 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1061 #if wxUSE_CTL3D
1062                                WXUINT message,
1063                                WXWPARAM wParam,
1064                                WXLPARAM lParam
1065 #else
1066                                WXUINT WXUNUSED(message),
1067                                WXWPARAM WXUNUSED(wParam),
1068                                WXLPARAM WXUNUSED(lParam)
1069 #endif
1070     )
1071 {
1072 #if wxUSE_CTL3D
1073     if ( m_useCtl3D )
1074     {
1075         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1076         return (WXHBRUSH) hbrush;
1077     }
1078 #endif // wxUSE_CTL3D
1079
1080     HDC hdc = (HDC)pDC;
1081     if (GetParent()->GetTransparentBackground())
1082         SetBkMode(hdc, TRANSPARENT);
1083     else
1084         SetBkMode(hdc, OPAQUE);
1085
1086     wxColour colBack = GetBackgroundColour();
1087
1088     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1089         colBack = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
1090
1091     ::SetBkColor(hdc, wxColourToRGB(colBack));
1092     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1093
1094     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1095
1096     return (WXHBRUSH)brush->GetResourceHandle();
1097 }
1098
1099 // In WIN16, need to override normal erasing because
1100 // Ctl3D doesn't use the wxWindows background colour.
1101 #ifdef __WIN16__
1102 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1103 {
1104     wxColour col(m_backgroundColour);
1105
1106 #if wxUSE_CTL3D
1107     if (m_useCtl3D)
1108         col = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
1109 #endif
1110
1111     RECT rect;
1112     ::GetClientRect(GetHwnd(), &rect);
1113
1114     COLORREF ref = PALETTERGB(col.Red(),
1115                               col.Green(),
1116                               col.Blue());
1117     HBRUSH hBrush = ::CreateSolidBrush(ref);
1118     if ( !hBrush )
1119         wxLogLastError(wxT("CreateSolidBrush"));
1120
1121     HDC hdc = (HDC)event.GetDC()->GetHDC();
1122
1123     int mode = ::SetMapMode(hdc, MM_TEXT);
1124
1125     ::FillRect(hdc, &rect, hBrush);
1126     ::DeleteObject(hBrush);
1127     ::SetMapMode(hdc, mode);
1128
1129 }
1130 #endif
1131
1132 bool wxTextCtrl::AdjustSpaceLimit()
1133 {
1134 #ifndef __WIN16__
1135     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1136
1137     // HACK: we try to automatically extend the limit for the amount of text
1138     //       to allow (interactively) entering more than 64Kb of text under
1139     //       Win9x but we shouldn't reset the text limit which was previously
1140     //       set explicitly with SetMaxLength()
1141     //
1142     //       we could solve this by storing the limit we set in wxTextCtrl but
1143     //       to save space we prefer to simply test here the actual limit
1144     //       value: we consider that SetMaxLength() can only be called for
1145     //       values < 32Kb
1146     if ( limit < 0x8000 )
1147     {
1148         // we've got more text than limit set by SetMaxLength()
1149         return FALSE;
1150     }
1151
1152     unsigned int len = ::GetWindowTextLength(GetHwnd());
1153     if ( len >= limit )
1154     {
1155         limit = len + 0x8000;    // 32Kb
1156
1157 #if wxUSE_RICHEDIT
1158         if ( m_isRich )
1159         {
1160             // as a nice side effect, this also allows passing limit > 64Kb
1161             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1162         }
1163         else
1164 #endif // wxUSE_RICHEDIT
1165         {
1166             if ( limit > 0xffff )
1167             {
1168                 // this will set it to a platform-dependent maximum (much more
1169                 // than 64Kb under NT)
1170                 limit = 0;
1171             }
1172
1173             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1174         }
1175     }
1176 #endif // !Win16
1177
1178     // we changed the limit
1179     return TRUE;
1180 }
1181
1182 bool wxTextCtrl::AcceptsFocus() const
1183 {
1184     // we don't want focus if we can't be edited
1185     return IsEditable() && wxControl::AcceptsFocus();
1186 }
1187
1188 wxSize wxTextCtrl::DoGetBestSize() const
1189 {
1190     int cx, cy;
1191     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1192
1193     int wText = DEFAULT_ITEM_WIDTH;
1194
1195     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1196     if ( m_windowStyle & wxTE_MULTILINE )
1197     {
1198         hText *= wxMax(GetNumberOfLines(), 5);
1199     }
1200     //else: for single line control everything is ok
1201
1202     return wxSize(wText, hText);
1203 }
1204
1205 // ----------------------------------------------------------------------------
1206 // standard handlers for standard edit menu events
1207 // ----------------------------------------------------------------------------
1208
1209 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1210 {
1211     Cut();
1212 }
1213
1214 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1215 {
1216     Copy();
1217 }
1218
1219 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1220 {
1221     Paste();
1222 }
1223
1224 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1225 {
1226     Undo();
1227 }
1228
1229 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1230 {
1231     Redo();
1232 }
1233
1234 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1235 {
1236     event.Enable( CanCut() );
1237 }
1238
1239 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1240 {
1241     event.Enable( CanCopy() );
1242 }
1243
1244 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1245 {
1246     event.Enable( CanPaste() );
1247 }
1248
1249 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1250 {
1251     event.Enable( CanUndo() );
1252 }
1253
1254 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1255 {
1256     event.Enable( CanRedo() );
1257 }
1258
1259 // the rest of the file only deals with the rich edit controls
1260 #if wxUSE_RICHEDIT
1261
1262 // ----------------------------------------------------------------------------
1263 // EN_LINK processing
1264 // ----------------------------------------------------------------------------
1265
1266 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1267 {
1268     NMHDR *hdr = (NMHDR* )lParam;
1269     if ( hdr->code == EN_LINK )
1270     {
1271         ENLINK *enlink = (ENLINK *)hdr;
1272
1273         switch ( enlink->msg )
1274         {
1275             case WM_SETCURSOR:
1276                 // ok, so it is hardcoded - do we really nee to customize it?
1277                 ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1278                 *result = TRUE;
1279                 break;
1280
1281             case WM_MOUSEMOVE:
1282             case WM_LBUTTONDOWN:
1283             case WM_LBUTTONUP:
1284             case WM_LBUTTONDBLCLK:
1285             case WM_RBUTTONDOWN:
1286             case WM_RBUTTONUP:
1287             case WM_RBUTTONDBLCLK:
1288                 // send a mouse event
1289                 {
1290                     static const wxEventType eventsMouse[] =
1291                     {
1292                         wxEVT_MOTION,
1293                         wxEVT_LEFT_DOWN,
1294                         wxEVT_LEFT_UP,
1295                         wxEVT_LEFT_DCLICK,
1296                         wxEVT_RIGHT_DOWN,
1297                         wxEVT_RIGHT_UP,
1298                         wxEVT_RIGHT_DCLICK,
1299                     };
1300
1301                     // the event ids are consecutive
1302                     wxMouseEvent
1303                         evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1304
1305                     InitMouseEvent(evtMouse,
1306                                    GET_X_LPARAM(enlink->lParam),
1307                                    GET_Y_LPARAM(enlink->lParam),
1308                                    enlink->wParam);
1309
1310                     wxTextUrlEvent event(m_windowId, evtMouse,
1311                                          enlink->chrg.cpMin,
1312                                          enlink->chrg.cpMax);
1313
1314                     InitCommandEvent(event);
1315
1316                     *result = ProcessCommand(event);
1317                 }
1318                 break;
1319         }
1320
1321         return TRUE;
1322     }
1323
1324     // not processed
1325     return FALSE;
1326 }
1327
1328 // ----------------------------------------------------------------------------
1329 // colour setting for the rich edit controls
1330 // ----------------------------------------------------------------------------
1331
1332 // Watcom C++ doesn't define this
1333 #ifndef SCF_ALL
1334 #define SCF_ALL 0x0004
1335 #endif
1336
1337 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1338 {
1339     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1340     {
1341         // colour didn't really change
1342         return FALSE;
1343     }
1344
1345     if ( IsRich() )
1346     {
1347         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1348         // EM_SETBKGNDCOLOR additionally
1349         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1350     }
1351
1352     return TRUE;
1353 }
1354
1355 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1356 {
1357     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1358     {
1359         // colour didn't really change
1360         return FALSE;
1361     }
1362
1363     if ( IsRich() )
1364     {
1365         // change the colour of everything
1366         CHARFORMAT cf;
1367         wxZeroMemory(cf);
1368         cf.cbSize = sizeof(cf);
1369         cf.dwMask = CFM_COLOR;
1370         cf.crTextColor = wxColourToRGB(colour);
1371         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1372     }
1373
1374     return TRUE;
1375 }
1376
1377 // ----------------------------------------------------------------------------
1378 // styling support for rich edit controls
1379 // ----------------------------------------------------------------------------
1380
1381 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1382 {
1383     if ( !IsRich() )
1384     {
1385         // can't do it with normal text control
1386         return FALSE;
1387     }
1388
1389     // the rich text control doesn't handle setting background colour, so don't
1390     // even try if it's the only thing we want to change
1391     if ( wxRichEditModule::GetLoadedVersion() < 2 &&
1392          !style.HasFont() && !style.HasTextColour() )
1393     {
1394         // nothing to do: return TRUE if there was really nothing to do and
1395         // FALSE if we failed to set bg colour
1396         return !style.HasBackgroundColour();
1397     }
1398
1399     // order the range if needed
1400     if ( start > end )
1401     {
1402         long tmp = start;
1403         start = end;
1404         end = tmp;
1405     }
1406
1407     // we can only change the format of the selection, so select the range we
1408     // want and restore the old selection later
1409     long startOld, endOld;
1410     GetSelection(&startOld, &endOld);
1411
1412     // but do we really have to change the selection?
1413     bool changeSel = start != startOld || end != endOld;
1414
1415     if ( changeSel )
1416         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM) start, (LPARAM) end);
1417
1418     // initialize CHARFORMAT struct
1419 #if wxUSE_RICHEDIT2
1420     CHARFORMAT2 cf;
1421 #else
1422     CHARFORMAT cf;
1423 #endif
1424     wxZeroMemory(cf);
1425     cf.cbSize = sizeof(cf);
1426
1427     if ( style.HasFont() )
1428     {
1429         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1430                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1431
1432         // fill in data from LOGFONT but recalculate lfHeight because we need
1433         // the real height in twips and not the negative number which
1434         // wxFillLogFont() returns (this is correct in general and works with
1435         // the Windows font mapper, but not here)
1436         LOGFONT lf;
1437         wxFillLogFont(&lf, &style.GetFont());
1438         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1439         cf.bCharSet = lf.lfCharSet;
1440         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1441         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1442
1443         // also deal with underline/italic/bold attributes: note that we must
1444         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1445         // style to allow clearing it
1446         if ( lf.lfItalic )
1447         {
1448             cf.dwEffects |= CFE_ITALIC;
1449         }
1450
1451         if ( lf.lfWeight == FW_BOLD )
1452         {
1453             cf.dwEffects |= CFE_BOLD;
1454         }
1455
1456         if ( lf.lfUnderline )
1457         {
1458             cf.dwEffects |= CFE_UNDERLINE;
1459         }
1460
1461         // strikeout fonts are not supported by wxWindows
1462     }
1463
1464     if ( style.HasTextColour() )
1465     {
1466         cf.dwMask |= CFM_COLOR;
1467         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1468     }
1469
1470 #if wxUSE_RICHEDIT2
1471     if ( wxRichEditModule::GetLoadedVersion() > 1 && style.HasBackgroundColour() )
1472     {
1473         cf.dwMask |= CFM_BACKCOLOR;
1474         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1475     }
1476 #endif // wxUSE_RICHEDIT2
1477
1478     // do format the selection
1479     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1480                             SCF_SELECTION, (LPARAM)&cf) != 0;
1481     if ( !ok )
1482     {
1483         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1484     }
1485
1486     if ( changeSel )
1487     {
1488         // restore the original selection
1489         SendMessage(GetHwnd(), EM_SETSEL, (WPARAM)startOld, (LPARAM)endOld);
1490     }
1491
1492     return ok;
1493 }
1494
1495 // ----------------------------------------------------------------------------
1496 // wxRichEditModule
1497 // ----------------------------------------------------------------------------
1498
1499 bool wxRichEditModule::OnInit()
1500 {
1501     // don't do anything - we will load it when needed
1502     return TRUE;
1503 }
1504
1505 void wxRichEditModule::OnExit()
1506 {
1507     if ( ms_hRichEdit )
1508     {
1509         FreeLibrary(ms_hRichEdit);
1510     }
1511 }
1512
1513 /* static */
1514 bool wxRichEditModule::Load(int version)
1515 {
1516     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1517                  _T("incorrect richedit control version requested") );
1518
1519     if ( version <= ms_verRichEdit )
1520     {
1521         // we've already got this or better
1522         return TRUE;
1523     }
1524
1525     if ( ms_hRichEdit )
1526     {
1527         ::FreeLibrary(ms_hRichEdit);
1528     }
1529
1530     // always try load riched20.dll first - like this we won't have to reload
1531     // it later if we're first asked for RE 1 and then for RE 2 or 3
1532     wxString dllname = _T("riched20.dll");
1533     ms_hRichEdit = ::LoadLibrary(dllname);
1534     ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
1535
1536     if ( !ms_hRichEdit && (version == 1) )
1537     {
1538         // fall back to RE 1
1539         dllname = _T("riched32.dll");
1540         ms_hRichEdit = ::LoadLibrary(dllname);
1541         ms_verRichEdit = 1;
1542     }
1543
1544     if ( !ms_hRichEdit )
1545     {
1546         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1547
1548         ms_verRichEdit = -1;
1549
1550         return FALSE;
1551     }
1552
1553     return TRUE;
1554 }
1555
1556 #endif // wxUSE_RICHEDIT
1557
1558 #endif // wxUSE_TEXTCTRL