src/msw/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #ifndef WX_PRECOMP
  32     #include "wx/textctrl.h"
  33     #include "wx/settings.h"
  34     #include "wx/brush.h"
  35     #include "wx/utils.h"
  36     #include "wx/intl.h"
  37     #include "wx/log.h"
  38     #include "wx/app.h"
  39 #endif
  40
  41 #if wxUSE_CLIPBOARD
  42     #include "wx/clipbrd.h"
  43 #endif
  44
  45 #include "wx/textfile.h"
  46
  47 #include <windowsx.h>
  48
  49 #include "wx/msw/private.h"
  50
  51 #include <string.h>
  52 #include <stdlib.h>
  53 #include <sys/types.h>
  54
  55 #if wxUSE_IOSTREAMH
  56 #   include <fstream.h>
  57 #else
  58 #   include <fstream>
  59 #endif
  60
  61 #if wxUSE_RICHEDIT && (!defined(__GNUWIN32__) || defined(wxUSE_NORLANDER_HEADERS))
  62     #include <richedit.h>
  63 #endif
  64
  65 // ----------------------------------------------------------------------------
  66 // private classes
  67 // ----------------------------------------------------------------------------
  68
  69 #if wxUSE_RICHEDIT
  70
  71 // this module initializes RichEdit DLL if needed
  72 class wxRichEditModule : public wxModule
  73 {
  74 public:
  75     virtual bool OnInit();
  76     virtual void OnExit();
  77
  78     // get the version currently loaded, -1 if none
  79     static int GetLoadedVersion() { return ms_verRichEdit; }
  80
  81     // load the richedit DLL of at least of required version
  82     static bool Load(int version = 1);
  83
  84 private:
  85     // the handle to richedit DLL and the version of the DLL loaded
  86     static HINSTANCE ms_hRichEdit;
  87
  88     // the DLL version loaded or -1 if none
  89     static int ms_verRichEdit;
  90
  91     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
  92 };
  93
  94 HINSTANCE wxRichEditModule::ms_hRichEdit = (HINSTANCE)NULL;
  95 int       wxRichEditModule::ms_verRichEdit = -1;
  96
  97 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
  98
  99 #endif // wxUSE_RICHEDIT
 100
 101 // ----------------------------------------------------------------------------
 102 // event tables and other macros
 103 // ----------------------------------------------------------------------------
 104
 105 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 106
 107 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 108     EVT_CHAR(wxTextCtrl::OnChar)
 109     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 110
 111     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 112     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 113     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 114     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 115     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 116
 117     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 118     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 119     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 120     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 121     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 122 END_EVENT_TABLE()
 123
 124
 125 // ============================================================================
 126 // implementation
 127 // ============================================================================
 128
 129 // ----------------------------------------------------------------------------
 130 // creation
 131 // ----------------------------------------------------------------------------
 132
 133 wxTextCtrl::wxTextCtrl()
 134 {
 135 #if wxUSE_RICHEDIT
 136     m_isRich = FALSE;
 137 #endif
 138 }
 139
 140 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 141                         const wxString& value,
 142                         const wxPoint& pos,
 143                         const wxSize& size,
 144                         long style,
 145                         const wxValidator& validator,
 146                         const wxString& name)
 147 {
 148     // base initialization
 149     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 150         return FALSE;
 151
 152     if ( parent )
 153         parent->AddChild(this);
 154
 155     // set colours
 156     SetupColours();
 157
 158     // translate wxWin style flags to MSW ones, checking for consistency while
 159     // doing it
 160     long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 161     if ( m_windowStyle & wxTE_MULTILINE )
 162     {
 163         wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 164                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline "
 165                           "text controls (they always process it)") );
 166
 167         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 168         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 169             msStyle |= WS_VSCROLL;
 170         m_windowStyle |= wxTE_PROCESS_ENTER;
 171     }
 172     else
 173         msStyle |= ES_AUTOHSCROLL;
 174
 175     if (m_windowStyle & wxHSCROLL)
 176         msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL);
 177
 178     if (m_windowStyle & wxTE_READONLY)
 179         msStyle |= ES_READONLY;
 180
 181     if (m_windowStyle & wxHSCROLL)
 182         msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL);
 183     if (m_windowStyle & wxTE_PASSWORD) // hidden input
 184         msStyle |= ES_PASSWORD;
 185
 186     // we always want the characters and the arrows
 187     m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
 188
 189     // we may have several different cases:
 190     // 1. normal case: both TAB and ENTER are used for dialog navigation
 191     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
 192     //    control in the dialog
 193     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
 194     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
 195     //    the next control
 196     if ( m_windowStyle & wxTE_PROCESS_ENTER )
 197         m_lDlgCode |= DLGC_WANTMESSAGE;
 198     if ( m_windowStyle & wxTE_PROCESS_TAB )
 199         m_lDlgCode |= DLGC_WANTTAB;
 200
 201     // do create the control - either an EDIT or RICHEDIT
 202     wxString windowClass = wxT("EDIT");
 203
 204 #if wxUSE_RICHEDIT
 205     if ( m_windowStyle & wxTE_RICH )
 206     {
 207         static bool s_errorGiven = FALSE;   // MT-FIXME
 208
 209         // only give the error msg once if the DLL can't be loaded
 210         if ( !s_errorGiven )
 211         {
 212             // first try to load the RichEdit DLL (will do nothing if already
 213             // done)
 214             if ( !wxRichEditModule::Load() )
 215             {
 216                 wxLogError(_("Impossible to create a rich edit control, "
 217                              "using simple text control instead. Please "
 218                              "reinstall riched32.dll"));
 219
 220                 s_errorGiven = TRUE;
 221             }
 222         }
 223
 224         if ( s_errorGiven )
 225         {
 226             m_isRich = FALSE;
 227         }
 228         else
 229         {
 230             msStyle |= ES_AUTOVSCROLL;
 231             m_isRich = TRUE;
 232
 233             int ver = wxRichEditModule::GetLoadedVersion();
 234             if ( ver == 1 )
 235             {
 236                 windowClass = wxT("RICHEDIT");
 237             }
 238             else
 239             {
 240 #ifndef RICHEDIT_CLASS
 241                 wxString RICHEDIT_CLASS;
 242                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), ver);
 243 #ifdef wxUSE_UNICODE
 244                 RICHEDIT_CLASS += _T('W');
 245 #else // ANSI
 246                 RICHEDIT_CLASS += _T('A');
 247 #endif // Unicode/ANSI
 248 #endif // !RICHEDIT_CLASS
 249
 250                 windowClass = RICHEDIT_CLASS;
 251             }
 252         }
 253     }
 254     else
 255         m_isRich = FALSE;
 256 #endif // wxUSE_RICHEDIT
 257
 258     bool want3D;
 259     WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
 260
 261     // Even with extended styles, need to combine with WS_BORDER for them to
 262     // look right.
 263     if ( want3D || wxStyleHasBorder(m_windowStyle) )
 264         msStyle |= WS_BORDER;
 265
 266     // NB: don't use pos and size as CreateWindowEx arguments because they
 267     //     might be -1 in which case we should use the default values (and
 268     //     SetSize called below takes care of it)
 269     m_hWnd = (WXHWND)::CreateWindowEx(exStyle,
 270                                       windowClass,
 271                                       NULL,
 272                                       msStyle,
 273                                       0, 0, 0, 0,
 274                                       GetHwndOf(parent),
 275                                       (HMENU)m_windowId,
 276                                       wxGetInstance(),
 277                                       NULL);
 278
 279     wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create text ctrl") );
 280
 281 #if wxUSE_CTL3D
 282     if ( want3D )
 283     {
 284         Ctl3dSubclassCtl(GetHwnd());
 285         m_useCtl3D = TRUE;
 286     }
 287 #endif
 288
 289 #if wxUSE_RICHEDIT
 290     if (m_isRich)
 291     {
 292         // Have to enable events
 293         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0,
 294                       ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 295     }
 296 #endif
 297
 298     SubclassWin(GetHWND());
 299
 300     // set font, position, size and initial value
 301     wxFont& fontParent = parent->GetFont();
 302     if ( fontParent.Ok() )
 303     {
 304         SetFont(fontParent);
 305     }
 306     else
 307     {
 308         SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 309     }
 310
 311     // Causes a crash for Symantec C++ and WIN32 for some reason
 312 #if !(defined(__SC__) && defined(__WIN32__))
 313     if ( !value.IsEmpty() )
 314     {
 315         SetValue(value);
 316     }
 317 #endif
 318
 319     SetSize(pos.x, pos.y, size.x, size.y);
 320
 321     return TRUE;
 322 }
 323
 324 // Make sure the window style (etc.) reflects the HWND style (roughly)
 325 void wxTextCtrl::AdoptAttributesFromHWND()
 326 {
 327   wxWindow::AdoptAttributesFromHWND();
 328
 329   HWND hWnd = GetHwnd();
 330   long style = GetWindowLong(hWnd, GWL_STYLE);
 331
 332   // retrieve the style to see whether this is an edit or richedit ctrl
 333 #if wxUSE_RICHEDIT
 334   wxChar buf[256];
 335
 336   GetClassName(hWnd, buf, WXSIZEOF(buf));
 337
 338   if ( wxStricmp(buf, wxT("EDIT")) == 0 )
 339     m_isRich = FALSE;
 340   else
 341     m_isRich = TRUE;
 342 #endif // wxUSE_RICHEDIT
 343
 344   if (style & ES_MULTILINE)
 345     m_windowStyle |= wxTE_MULTILINE;
 346   if (style & ES_PASSWORD)
 347     m_windowStyle |= wxTE_PASSWORD;
 348   if (style & ES_READONLY)
 349     m_windowStyle |= wxTE_READONLY;
 350   if (style & ES_WANTRETURN)
 351     m_windowStyle |= wxTE_PROCESS_ENTER;
 352 }
 353
 354 void wxTextCtrl::SetupColours()
 355 {
 356     // FIXME why is bg colour not inherited from parent?
 357     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 358     SetForegroundColour(GetParent()->GetForegroundColour());
 359 }
 360
 361 // ----------------------------------------------------------------------------
 362 // set/get the controls text
 363 // ----------------------------------------------------------------------------
 364
 365 wxString wxTextCtrl::GetValue() const
 366 {
 367     // we can't use wxGetWindowText() (i.e. WM_GETTEXT internally) for
 368     // retrieving more than 64Kb under Win9x
 369 #if wxUSE_RICHEDIT
 370     if ( m_isRich )
 371     {
 372         wxString str;
 373
 374         int len = GetWindowTextLength(GetHwnd()) + 1;
 375         wxChar *p = str.GetWriteBuf(len);
 376
 377         TEXTRANGE textRange;
 378         textRange.chrg.cpMin = 0;
 379         textRange.chrg.cpMax = -1;
 380         textRange.lpstrText = p;
 381
 382         (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 383
 384         // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for the
 385         // newlines which is neither Unix nor Windows style (Win95 with
 386         // riched20.dll shows this behaviour) - convert it to something
 387         // reasonable
 388         for ( ; *p; p++ )
 389         {
 390             if ( *p == _T('\r') )
 391                 *p = _T('\n');
 392         }
 393
 394         str.UngetWriteBuf();
 395
 396         return str;
 397     }
 398 #endif // wxUSE_RICHEDIT
 399
 400     // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 401     // same one as above for consitency
 402     wxString str = wxGetWindowText(GetHWND());
 403
 404     return wxTextFile::Translate(str, wxTextFileType_Unix);
 405 }
 406
 407 void wxTextCtrl::SetValue(const wxString& value)
 408 {
 409     // if the text is long enough, it's faster to just set it instead of first
 410     // comparing it with the old one (chances are that it will be different
 411     // anyhow, this comparison is there to avoid flicker for small single-line
 412     // edit controls mostly)
 413     if ( (value.length() > 0x400) || (value != GetValue()) )
 414     {
 415         wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 416
 417         SetWindowText(GetHwnd(), valueDos);
 418
 419         AdjustSpaceLimit();
 420     }
 421 }
 422
 423 void wxTextCtrl::WriteText(const wxString& value)
 424 {
 425     wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 426
 427     SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 428
 429     AdjustSpaceLimit();
 430 }
 431
 432 void wxTextCtrl::AppendText(const wxString& text)
 433 {
 434     SetInsertionPointEnd();
 435     WriteText(text);
 436 }
 437
 438 void wxTextCtrl::Clear()
 439 {
 440     SetWindowText(GetHwnd(), wxT(""));
 441 }
 442
 443 // ----------------------------------------------------------------------------
 444 // Clipboard operations
 445 // ----------------------------------------------------------------------------
 446
 447 void wxTextCtrl::Copy()
 448 {
 449     if (CanCopy())
 450     {
 451         HWND hWnd = GetHwnd();
 452         SendMessage(hWnd, WM_COPY, 0, 0L);
 453     }
 454 }
 455
 456 void wxTextCtrl::Cut()
 457 {
 458     if (CanCut())
 459     {
 460         HWND hWnd = GetHwnd();
 461         SendMessage(hWnd, WM_CUT, 0, 0L);
 462     }
 463 }
 464
 465 void wxTextCtrl::Paste()
 466 {
 467     if (CanPaste())
 468     {
 469         HWND hWnd = GetHwnd();
 470         SendMessage(hWnd, WM_PASTE, 0, 0L);
 471     }
 472 }
 473
 474 bool wxTextCtrl::CanCopy() const
 475 {
 476     // Can copy if there's a selection
 477     long from, to;
 478     GetSelection(& from, & to);
 479     return (from != to);
 480 }
 481
 482 bool wxTextCtrl::CanCut() const
 483 {
 484     // Can cut if there's a selection
 485     long from, to;
 486     GetSelection(& from, & to);
 487     return (from != to);
 488 }
 489
 490 bool wxTextCtrl::CanPaste() const
 491 {
 492 #if wxUSE_RICHEDIT
 493     if (m_isRich)
 494     {
 495         int dataFormat = 0; // 0 == any format
 496         return (::SendMessage( GetHwnd(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 497     }
 498 #endif
 499     if (!IsEditable())
 500         return FALSE;
 501
 502     // Standard edit control: check for straight text on clipboard
 503     bool isTextAvailable = FALSE;
 504     if ( ::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 505     {
 506         isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
 507         ::CloseClipboard();
 508     }
 509
 510     return isTextAvailable;
 511 }
 512
 513 // ----------------------------------------------------------------------------
 514 // Accessors
 515 // ----------------------------------------------------------------------------
 516
 517 void wxTextCtrl::SetEditable(bool editable)
 518 {
 519     HWND hWnd = GetHwnd();
 520     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 521 }
 522
 523 void wxTextCtrl::SetInsertionPoint(long pos)
 524 {
 525     HWND hWnd = GetHwnd();
 526 #ifdef __WIN32__
 527 #if wxUSE_RICHEDIT
 528     if ( m_isRich)
 529     {
 530         CHARRANGE range;
 531         range.cpMin = pos;
 532         range.cpMax = pos;
 533         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 534         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 535     }
 536     else
 537 #endif // wxUSE_RICHEDIT
 538     {
 539         SendMessage(hWnd, EM_SETSEL, pos, pos);
 540         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 541     }
 542 #else // Win16
 543     SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 544 #endif // Win32/16
 545
 546     static const char *nothing = "";
 547     SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 548 }
 549
 550 void wxTextCtrl::SetInsertionPointEnd()
 551 {
 552     long pos = GetLastPosition();
 553     SetInsertionPoint(pos);
 554 }
 555
 556 long wxTextCtrl::GetInsertionPoint() const
 557 {
 558 #if wxUSE_RICHEDIT
 559     if (m_isRich)
 560     {
 561         CHARRANGE range;
 562         range.cpMin = 0;
 563         range.cpMax = 0;
 564         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 565         return range.cpMin;
 566     }
 567 #endif
 568
 569     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 570     return Pos & 0xFFFF;
 571 }
 572
 573 long wxTextCtrl::GetLastPosition() const
 574 {
 575     HWND hWnd = GetHwnd();
 576
 577     // Will always return a number > 0 (according to docs)
 578     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 579
 580     // This gets the char index for the _beginning_ of the last line
 581     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 582
 583     // Get number of characters in the last line. We'll add this to the character
 584     // index for the last line, 1st position.
 585     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 586
 587     return (long)(charIndex + lineLength);
 588 }
 589
 590 // If the return values from and to are the same, there is no
 591 // selection.
 592 void wxTextCtrl::GetSelection(long* from, long* to) const
 593 {
 594 #if wxUSE_RICHEDIT
 595     if (m_isRich)
 596     {
 597         CHARRANGE charRange;
 598         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 599
 600         *from = charRange.cpMin;
 601         *to = charRange.cpMax;
 602
 603         return;
 604     }
 605 #endif
 606     DWORD dwStart, dwEnd;
 607     WPARAM wParam = (WPARAM) (DWORD*) & dwStart; // receives starting position
 608     LPARAM lParam = (LPARAM) (DWORD*) & dwEnd;   // receives ending position
 609
 610     ::SendMessage(GetHwnd(), EM_GETSEL, wParam, lParam);
 611
 612     *from = dwStart;
 613     *to = dwEnd;
 614 }
 615
 616 bool wxTextCtrl::IsEditable() const
 617 {
 618     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 619
 620     return ((style & ES_READONLY) == 0);
 621 }
 622
 623 // ----------------------------------------------------------------------------
 624 // Editing
 625 // ----------------------------------------------------------------------------
 626
 627 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 628 {
 629 #if wxUSE_CLIPBOARD
 630     HWND hWnd = GetHwnd();
 631     long fromChar = from;
 632     long toChar = to;
 633
 634     // Set selection and remove it
 635 #ifdef __WIN32__
 636     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 637 #else
 638     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 639 #endif
 640     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 641
 642     // Now replace with 'value', by pasting.
 643     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const wxChar *)value, 0, 0);
 644
 645     // Paste into edit control
 646     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 647 #else
 648     wxFAIL_MSG("wxTextCtrl::Replace not implemented if wxUSE_CLIPBOARD is 0.");
 649 #endif
 650 }
 651
 652 void wxTextCtrl::Remove(long from, long to)
 653 {
 654     HWND hWnd = GetHwnd();
 655     long fromChar = from;
 656     long toChar = to;
 657
 658     // Cut all selected text
 659 #ifdef __WIN32__
 660     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 661 #else
 662     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 663 #endif
 664     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 665 }
 666
 667 void wxTextCtrl::SetSelection(long from, long to)
 668 {
 669     HWND hWnd = GetHwnd();
 670     long fromChar = from;
 671     long toChar = to;
 672
 673     // if from and to are both -1, it means (in wxWindows) that all text should
 674     // be selected. Translate into Windows convention
 675     if ((from == -1) && (to == -1))
 676     {
 677       fromChar = 0;
 678       toChar = -1;
 679     }
 680
 681 #ifdef __WIN32__
 682     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 683     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 684 #else
 685     // WPARAM is 0: selection is scrolled into view
 686     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 687 #endif
 688 }
 689
 690 bool wxTextCtrl::LoadFile(const wxString& file)
 691 {
 692     if ( wxTextCtrlBase::LoadFile(file) )
 693     {
 694         // update the size limit if needed
 695         AdjustSpaceLimit();
 696
 697         return TRUE;
 698     }
 699
 700     return FALSE;
 701 }
 702
 703 bool wxTextCtrl::IsModified() const
 704 {
 705     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 706 }
 707
 708 // Makes 'unmodified'
 709 void wxTextCtrl::DiscardEdits()
 710 {
 711     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 712 }
 713
 714 int wxTextCtrl::GetNumberOfLines() const
 715 {
 716     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 717 }
 718
 719 long wxTextCtrl::XYToPosition(long x, long y) const
 720 {
 721     HWND hWnd = GetHwnd();
 722
 723     // This gets the char index for the _beginning_ of this line
 724     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 725     return (long)(x + charIndex);
 726 }
 727
 728 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 729 {
 730     HWND hWnd = GetHwnd();
 731
 732     // This gets the line number containing the character
 733     int lineNo;
 734 #if wxUSE_RICHEDIT
 735     if ( m_isRich )
 736     {
 737         lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 738     }
 739     else
 740 #endif // wxUSE_RICHEDIT
 741         lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 742
 743     if ( lineNo == -1 )
 744     {
 745         // no such line
 746         return FALSE;
 747     }
 748
 749     // This gets the char index for the _beginning_ of this line
 750     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 751     if ( charIndex == -1 )
 752     {
 753         return FALSE;
 754     }
 755
 756     // The X position must therefore be the different between pos and charIndex
 757     if ( x )
 758         *x = (long)(pos - charIndex);
 759     if ( y )
 760         *y = (long)lineNo;
 761
 762     return TRUE;
 763 }
 764
 765 void wxTextCtrl::ShowPosition(long pos)
 766 {
 767     HWND hWnd = GetHwnd();
 768
 769     // To scroll to a position, we pass the number of lines and characters
 770     // to scroll *by*. This means that we need to:
 771     // (1) Find the line position of the current line.
 772     // (2) Find the line position of pos.
 773     // (3) Scroll by (pos - current).
 774     // For now, ignore the horizontal scrolling.
 775
 776     // Is this where scrolling is relative to - the line containing the caret?
 777     // Or is the first visible line??? Try first visible line.
 778 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 779
 780     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 781
 782     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 783
 784     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 785
 786     if (linesToScroll != 0)
 787       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 788 }
 789
 790 int wxTextCtrl::GetLineLength(long lineNo) const
 791 {
 792     long charIndex = XYToPosition(0, lineNo);
 793     int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
 794     return len;
 795 }
 796
 797 wxString wxTextCtrl::GetLineText(long lineNo) const
 798 {
 799     size_t len = (size_t)GetLineLength(lineNo) + 1;
 800     char *buf = (char *)malloc(len);
 801     *(WORD *)buf = len;
 802     int noChars = (int)SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
 803     buf[noChars] = 0;
 804
 805     wxString str(buf);
 806
 807     free(buf);
 808
 809     return str;
 810 }
 811
 812 // ----------------------------------------------------------------------------
 813 // Undo/redo
 814 // ----------------------------------------------------------------------------
 815
 816 void wxTextCtrl::Undo()
 817 {
 818     if (CanUndo())
 819     {
 820         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 821     }
 822 }
 823
 824 void wxTextCtrl::Redo()
 825 {
 826     if (CanRedo())
 827     {
 828         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 829         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 830     }
 831 }
 832
 833 bool wxTextCtrl::CanUndo() const
 834 {
 835     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 836 }
 837
 838 bool wxTextCtrl::CanRedo() const
 839 {
 840     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 841 }
 842
 843 // ----------------------------------------------------------------------------
 844 // implemenation details
 845 // ----------------------------------------------------------------------------
 846
 847 void wxTextCtrl::Command(wxCommandEvent & event)
 848 {
 849     SetValue(event.GetString());
 850     ProcessCommand (event);
 851 }
 852
 853 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 854 {
 855     // By default, load the first file into the text window.
 856     if (event.GetNumberOfFiles() > 0)
 857     {
 858         LoadFile(event.GetFiles()[0]);
 859     }
 860 }
 861
 862 void wxTextCtrl::OnChar(wxKeyEvent& event)
 863 {
 864     switch ( event.KeyCode() )
 865     {
 866         case WXK_RETURN:
 867             if ( !(m_windowStyle & wxTE_MULTILINE) )
 868             {
 869                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 870                 event.SetEventObject( this );
 871                 if ( GetEventHandler()->ProcessEvent(event) )
 872                     return;
 873             }
 874             //else: multiline controls need Enter for themselves
 875
 876             break;
 877
 878         case WXK_TAB:
 879             // always produce navigation event - even if we process TAB
 880             // ourselves the fact that we got here means that the user code
 881             // decided to skip processing of this TAB - probably to let it
 882             // do its default job.
 883             //
 884             // NB: Notice that Ctrl-Tab is handled elsewhere and Alt-Tab is
 885             //     handled by Windows
 886             {
 887                 wxNavigationKeyEvent eventNav;
 888                 eventNav.SetDirection(!event.ShiftDown());
 889                 eventNav.SetWindowChange(FALSE);
 890                 eventNav.SetEventObject(this);
 891
 892                 if ( GetEventHandler()->ProcessEvent(eventNav) )
 893                     return;
 894             }
 895             break;
 896
 897         default:
 898             event.Skip();
 899             return;
 900     }
 901
 902     // don't just call event.Skip() because this will cause TABs and ENTERs
 903     // be passed upwards and we don't always want this - instead process it
 904     // right here
 905
 906     // FIXME
 907     event.Skip();
 908 }
 909
 910 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 911 {
 912     switch (param)
 913     {
 914         case EN_SETFOCUS:
 915         case EN_KILLFOCUS:
 916             {
 917                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
 918                         : wxEVT_SET_FOCUS,
 919                         m_windowId);
 920                 event.SetEventObject( this );
 921                 GetEventHandler()->ProcessEvent(event);
 922             }
 923             break;
 924
 925         case EN_CHANGE:
 926             {
 927                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
 928                 wxString val(GetValue());
 929                 if ( !val.IsNull() )
 930                     event.m_commandString = WXSTRINGCAST val;
 931                 event.SetEventObject( this );
 932                 ProcessCommand(event);
 933             }
 934             break;
 935
 936         case EN_MAXTEXT:
 937             // the text size limit has been hit - increase it
 938             AdjustSpaceLimit();
 939             break;
 940
 941             // the other notification messages are not processed
 942         case EN_UPDATE:
 943         case EN_ERRSPACE:
 944         case EN_HSCROLL:
 945         case EN_VSCROLL:
 946         default:
 947             return FALSE;
 948     }
 949
 950     // processed
 951     return TRUE;
 952 }
 953
 954 void wxTextCtrl::AdjustSpaceLimit()
 955 {
 956 #ifndef __WIN16__
 957     unsigned int len = ::GetWindowTextLength(GetHwnd()),
 958     limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
 959     if ( len >= limit )
 960     {
 961         limit = len + 0x8000;    // 32Kb
 962
 963 #if wxUSE_RICHEDIT
 964         if ( m_isRich )
 965         {
 966             // as a nice side effect, this also allows passing limit > 64Kb
 967             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
 968         }
 969         else
 970 #endif // wxUSE_RICHEDIT
 971         {
 972             if ( limit > 0xffff )
 973             {
 974                 // this will set it to a platform-dependent maximum (much more
 975                 // than 64Kb under NT)
 976                 limit = 0;
 977             }
 978
 979             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
 980         }
 981     }
 982 #endif // !Win16
 983 }
 984
 985 bool wxTextCtrl::AcceptsFocus() const
 986 {
 987     // we don't want focus if we can't be edited
 988     return IsEditable() && wxControl::AcceptsFocus();
 989 }
 990
 991 wxSize wxTextCtrl::DoGetBestSize() const
 992 {
 993     int cx, cy;
 994     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
 995
 996     int wText = DEFAULT_ITEM_WIDTH;
 997
 998     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 999     if ( m_windowStyle & wxTE_MULTILINE )
1000     {
1001         hText *= wxMin(GetNumberOfLines(), 5);
1002     }
1003     //else: for single line control everything is ok
1004
1005     return wxSize(wText, hText);
1006 }
1007
1008 // ----------------------------------------------------------------------------
1009 // standard handlers for standard edit menu events
1010 // ----------------------------------------------------------------------------
1011
1012 void wxTextCtrl::OnCut(wxCommandEvent& event)
1013 {
1014     Cut();
1015 }
1016
1017 void wxTextCtrl::OnCopy(wxCommandEvent& event)
1018 {
1019     Copy();
1020 }
1021
1022 void wxTextCtrl::OnPaste(wxCommandEvent& event)
1023 {
1024     Paste();
1025 }
1026
1027 void wxTextCtrl::OnUndo(wxCommandEvent& event)
1028 {
1029     Undo();
1030 }
1031
1032 void wxTextCtrl::OnRedo(wxCommandEvent& event)
1033 {
1034     Redo();
1035 }
1036
1037 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1038 {
1039     event.Enable( CanCut() );
1040 }
1041
1042 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1043 {
1044     event.Enable( CanCopy() );
1045 }
1046
1047 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1048 {
1049     event.Enable( CanPaste() );
1050 }
1051
1052 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1053 {
1054     event.Enable( CanUndo() );
1055 }
1056
1057 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1058 {
1059     event.Enable( CanRedo() );
1060 }
1061
1062 // ----------------------------------------------------------------------------
1063 // wxRichEditModule
1064 // ----------------------------------------------------------------------------
1065
1066 #if wxUSE_RICHEDIT
1067
1068 bool wxRichEditModule::OnInit()
1069 {
1070     // don't do anything - we will load it when needed
1071     return TRUE;
1072 }
1073
1074 void wxRichEditModule::OnExit()
1075 {
1076     if ( ms_hRichEdit )
1077     {
1078         FreeLibrary(ms_hRichEdit);
1079     }
1080 }
1081
1082 /* static */
1083 bool wxRichEditModule::Load(int version)
1084 {
1085     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1086                  _T("incorrect richedit control version requested") );
1087
1088     if ( version <= ms_verRichEdit )
1089     {
1090         // we've already got this or better
1091         return TRUE;
1092     }
1093
1094     if ( ms_hRichEdit )
1095     {
1096         ::FreeLibrary(ms_hRichEdit);
1097     }
1098
1099     // always try load riched20.dll first - like this we won't have to reload
1100     // it later if we're first asked for RE 1 and then for RE 2 or 3
1101     wxString dllname = _T("riched20.dll");
1102     ms_hRichEdit = ::LoadLibrary(dllname);
1103     ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
1104
1105     if ( !ms_hRichEdit && (version == 1) )
1106     {
1107         // fall back to RE 1
1108         dllname = _T("riched32.dll");
1109         ms_hRichEdit = ::LoadLibrary(dllname);
1110         ms_verRichEdit = 1;
1111     }
1112
1113     if ( !ms_hRichEdit )
1114     {
1115         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1116
1117         ms_verRichEdit = -1;
1118
1119         return FALSE;
1120     }
1121
1122     return TRUE;
1123 }
1124
1125 #endif // wxUSE_RICHEDIT
1126