src/common/utilscmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        utilscmn.cpp
   3 // Purpose:     Miscellaneous utility functions and classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     29/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "utils.h"
  22 #endif
  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/defs.h"
  33     #include "wx/string.h"
  34     #include "wx/utils.h"
  35     #include "wx/intl.h"
  36     #include "wx/log.h"
  37
  38     #if wxUSE_GUI
  39         #include "wx/app.h"
  40         #include "wx/window.h"
  41         #include "wx/frame.h"
  42         #include "wx/menu.h"
  43         #include "wx/msgdlg.h"
  44         #include "wx/textdlg.h"
  45         #include "wx/textctrl.h"    // for wxTE_PASSWORD
  46         #if wxUSE_ACCEL
  47             #include "wx/menuitem.h"
  48             #include "wx/accel.h"
  49         #endif // wxUSE_ACCEL
  50     #endif // wxUSE_GUI
  51 #endif // WX_PRECOMP
  52
  53 #ifndef __WIN16__
  54 #include "wx/process.h"
  55 #include "wx/txtstrm.h"
  56 #endif
  57
  58 #include <ctype.h>
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <string.h>
  62
  63 #if !defined(__WATCOMC__)
  64     #if !(defined(_MSC_VER) && (_MSC_VER > 800))
  65         #include <errno.h>
  66     #endif
  67 #endif
  68
  69 #if wxUSE_GUI
  70     #include "wx/colordlg.h"
  71     #include "wx/fontdlg.h"
  72     #include "wx/notebook.h"
  73     #include "wx/frame.h"
  74     #include "wx/statusbr.h"
  75 #endif // wxUSE_GUI
  76
  77 #include <time.h>
  78
  79 #ifndef __MWERKS__
  80     #include <sys/types.h>
  81     #include <sys/stat.h>
  82 #endif
  83
  84 #ifdef __SALFORDC__
  85     #include <clib.h>
  86 #endif
  87
  88 #ifdef __WXMSW__
  89     #include "wx/msw/private.h"
  90 #endif
  91
  92 #if 1 // def __WXBASE__
  93
  94 // ----------------------------------------------------------------------------
  95 // common data
  96 // ----------------------------------------------------------------------------
  97
  98 #if WXWIN_COMPATIBILITY_2_2
  99     const wxChar *wxInternalErrorStr = wxT("wxWindows Internal Error");
 100     const wxChar *wxFatalErrorStr = wxT("wxWindows Fatal Error");
 101 #endif // WXWIN_COMPATIBILITY_2_2
 102
 103 // ============================================================================
 104 // implementation
 105 // ============================================================================
 106
 107 #if WXWIN_COMPATIBILITY_2_4
 108
 109 wxChar *
 110 copystring (const wxChar *s)
 111 {
 112   if (s == NULL) s = wxT("");
 113   size_t len = wxStrlen (s) + 1;
 114
 115   wxChar *news = new wxChar[len];
 116   memcpy (news, s, len * sizeof(wxChar));    // Should be the fastest
 117
 118   return news;
 119 }
 120
 121 #endif // WXWIN_COMPATIBILITY_2_4
 122
 123 // Id generation
 124 static long wxCurrentId = 100;
 125
 126 long
 127 wxNewId (void)
 128 {
 129   return wxCurrentId++;
 130 }
 131
 132 long
 133 wxGetCurrentId(void) { return wxCurrentId; }
 134
 135 void
 136 wxRegisterId (long id)
 137 {
 138   if (id >= wxCurrentId)
 139     wxCurrentId = id + 1;
 140 }
 141
 142 // ----------------------------------------------------------------------------
 143 // String <-> Number conversions (deprecated)
 144 // ----------------------------------------------------------------------------
 145
 146 #if WXWIN_COMPATIBILITY_2_4
 147
 148 WXDLLEXPORT_DATA(const wxChar *) wxFloatToStringStr = wxT("%.2f");
 149 WXDLLEXPORT_DATA(const wxChar *) wxDoubleToStringStr = wxT("%.2f");
 150
 151 void
 152 StringToFloat (const wxChar *s, float *number)
 153 {
 154   if (s && *s && number)
 155     *number = (float) wxStrtod (s, (wxChar **) NULL);
 156 }
 157
 158 void
 159 StringToDouble (const wxChar *s, double *number)
 160 {
 161   if (s && *s && number)
 162     *number = wxStrtod (s, (wxChar **) NULL);
 163 }
 164
 165 wxChar *
 166 FloatToString (float number, const wxChar *fmt)
 167 {
 168   static wxChar buf[256];
 169
 170   wxSprintf (buf, fmt, number);
 171   return buf;
 172 }
 173
 174 wxChar *
 175 DoubleToString (double number, const wxChar *fmt)
 176 {
 177   static wxChar buf[256];
 178
 179   wxSprintf (buf, fmt, number);
 180   return buf;
 181 }
 182
 183 void
 184 StringToInt (const wxChar *s, int *number)
 185 {
 186   if (s && *s && number)
 187     *number = (int) wxStrtol (s, (wxChar **) NULL, 10);
 188 }
 189
 190 void
 191 StringToLong (const wxChar *s, long *number)
 192 {
 193   if (s && *s && number)
 194     *number = wxStrtol (s, (wxChar **) NULL, 10);
 195 }
 196
 197 wxChar *
 198 IntToString (int number)
 199 {
 200   static wxChar buf[20];
 201
 202   wxSprintf (buf, wxT("%d"), number);
 203   return buf;
 204 }
 205
 206 wxChar *
 207 LongToString (long number)
 208 {
 209   static wxChar buf[20];
 210
 211   wxSprintf (buf, wxT("%ld"), number);
 212   return buf;
 213 }
 214
 215 #endif // WXWIN_COMPATIBILITY_2_4
 216
 217 // Array used in DecToHex conversion routine.
 218 static wxChar hexArray[] = wxT("0123456789ABCDEF");
 219
 220 // Convert 2-digit hex number to decimal
 221 int wxHexToDec(const wxString& buf)
 222 {
 223   int firstDigit, secondDigit;
 224
 225   if (buf.GetChar(0) >= wxT('A'))
 226     firstDigit = buf.GetChar(0) - wxT('A') + 10;
 227   else
 228     firstDigit = buf.GetChar(0) - wxT('0');
 229
 230   if (buf.GetChar(1) >= wxT('A'))
 231     secondDigit = buf.GetChar(1) - wxT('A') + 10;
 232   else
 233     secondDigit = buf.GetChar(1) - wxT('0');
 234
 235   return (firstDigit & 0xF) * 16 + (secondDigit & 0xF );
 236 }
 237
 238 // Convert decimal integer to 2-character hex string
 239 void wxDecToHex(int dec, wxChar *buf)
 240 {
 241   int firstDigit = (int)(dec/16.0);
 242   int secondDigit = (int)(dec - (firstDigit*16.0));
 243   buf[0] = hexArray[firstDigit];
 244   buf[1] = hexArray[secondDigit];
 245   buf[2] = 0;
 246 }
 247
 248 // Convert decimal integer to 2-character hex string
 249 wxString wxDecToHex(int dec)
 250 {
 251     wxChar buf[3];
 252     wxDecToHex(dec, buf);
 253     return wxString(buf);
 254 }
 255
 256 // ----------------------------------------------------------------------------
 257 // misc functions
 258 // ----------------------------------------------------------------------------
 259
 260 // Return the current date/time
 261 wxString wxNow()
 262 {
 263     time_t now = time((time_t *) NULL);
 264     char *date = ctime(&now);
 265     date[24] = '\0';
 266     return wxString::FromAscii(date);
 267 }
 268
 269 const wxChar *wxGetInstallPrefix()
 270 {
 271     wxString prefix;
 272
 273     if ( wxGetEnv(wxT("WXPREFIX"), &prefix) )
 274         return prefix.c_str();
 275
 276 #ifdef wxINSTALL_PREFIX
 277     return wxT(wxINSTALL_PREFIX);
 278 #else
 279     return wxT("");
 280 #endif
 281 }
 282
 283 wxString wxGetDataDir()
 284 {
 285     wxString format = wxGetInstallPrefix();
 286     format <<  wxFILE_SEP_PATH
 287            << wxT("share") << wxFILE_SEP_PATH
 288            << wxT("wx") << wxFILE_SEP_PATH
 289            << wxT("%i.%i");
 290     wxString dir;
 291     dir.Printf(format.c_str(), wxMAJOR_VERSION, wxMINOR_VERSION);
 292     return dir;
 293 }
 294
 295
 296 // ----------------------------------------------------------------------------
 297 // network and user id functions
 298 // ----------------------------------------------------------------------------
 299
 300 // Get Full RFC822 style email address
 301 bool wxGetEmailAddress(wxChar *address, int maxSize)
 302 {
 303     wxString email = wxGetEmailAddress();
 304     if ( !email )
 305         return FALSE;
 306
 307     wxStrncpy(address, email, maxSize - 1);
 308     address[maxSize - 1] = wxT('\0');
 309
 310     return TRUE;
 311 }
 312
 313 wxString wxGetEmailAddress()
 314 {
 315     wxString email;
 316
 317     wxString host = wxGetFullHostName();
 318     if ( !!host )
 319     {
 320         wxString user = wxGetUserId();
 321         if ( !!user )
 322         {
 323             email << user << wxT('@') << host;
 324         }
 325     }
 326
 327     return email;
 328 }
 329
 330 wxString wxGetUserId()
 331 {
 332     static const int maxLoginLen = 256; // FIXME arbitrary number
 333
 334     wxString buf;
 335     bool ok = wxGetUserId(buf.GetWriteBuf(maxLoginLen), maxLoginLen);
 336     buf.UngetWriteBuf();
 337
 338     if ( !ok )
 339         buf.Empty();
 340
 341     return buf;
 342 }
 343
 344 wxString wxGetUserName()
 345 {
 346     static const int maxUserNameLen = 1024; // FIXME arbitrary number
 347
 348     wxString buf;
 349     bool ok = wxGetUserName(buf.GetWriteBuf(maxUserNameLen), maxUserNameLen);
 350     buf.UngetWriteBuf();
 351
 352     if ( !ok )
 353         buf.Empty();
 354
 355     return buf;
 356 }
 357
 358 wxString wxGetHostName()
 359 {
 360     static const size_t hostnameSize = 257;
 361
 362     wxString buf;
 363     bool ok = wxGetHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
 364
 365     buf.UngetWriteBuf();
 366
 367     if ( !ok )
 368         buf.Empty();
 369
 370     return buf;
 371 }
 372
 373 wxString wxGetFullHostName()
 374 {
 375     static const size_t hostnameSize = 257;
 376
 377     wxString buf;
 378     bool ok = wxGetFullHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
 379
 380     buf.UngetWriteBuf();
 381
 382     if ( !ok )
 383         buf.Empty();
 384
 385     return buf;
 386 }
 387
 388 wxString wxGetHomeDir()
 389 {
 390     wxString home;
 391     wxGetHomeDir(&home);
 392
 393     return home;
 394 }
 395
 396 #if 0
 397
 398 wxString wxGetCurrentDir()
 399 {
 400     wxString dir;
 401     size_t len = 1024;
 402     bool ok;
 403     do
 404     {
 405         ok = getcwd(dir.GetWriteBuf(len + 1), len) != NULL;
 406         dir.UngetWriteBuf();
 407
 408         if ( !ok )
 409         {
 410             if ( errno != ERANGE )
 411             {
 412                 wxLogSysError(_T("Failed to get current directory"));
 413
 414                 return wxEmptyString;
 415             }
 416             else
 417             {
 418                 // buffer was too small, retry with a larger one
 419                 len *= 2;
 420             }
 421         }
 422         //else: ok
 423     } while ( !ok );
 424
 425     return dir;
 426 }
 427
 428 #endif // 0
 429
 430 // ----------------------------------------------------------------------------
 431 // wxExecute
 432 // ----------------------------------------------------------------------------
 433
 434 // wxDoExecuteWithCapture() helper: reads an entire stream into one array
 435 //
 436 // returns TRUE if ok, FALSE if error
 437 #if wxUSE_STREAMS
 438 static bool ReadAll(wxInputStream *is, wxArrayString& output)
 439 {
 440     wxCHECK_MSG( is, FALSE, _T("NULL stream in wxExecute()?") );
 441
 442     // the stream could be already at EOF or in wxSTREAM_BROKEN_PIPE state
 443     is->Reset();
 444
 445     wxTextInputStream tis(*is);
 446
 447     bool cont = TRUE;
 448     while ( cont )
 449     {
 450         wxString line = tis.ReadLine();
 451         if ( is->Eof() )
 452             break;
 453
 454         if ( !*is )
 455         {
 456             cont = FALSE;
 457         }
 458         else
 459         {
 460             output.Add(line);
 461         }
 462     }
 463
 464     return cont;
 465 }
 466 #endif // wxUSE_STREAMS
 467
 468 // this is a private function because it hasn't a clean interface: the first
 469 // array is passed by reference, the second by pointer - instead we have 2
 470 // public versions of wxExecute() below
 471 static long wxDoExecuteWithCapture(const wxString& command,
 472                                    wxArrayString& output,
 473                                    wxArrayString* error)
 474 {
 475 #ifdef __WIN16__
 476     wxFAIL_MSG("Sorry, this version of wxExecute not implemented on WIN16.");
 477
 478     return 0;
 479 #else // !Win16
 480     // create a wxProcess which will capture the output
 481     wxProcess *process = new wxProcess;
 482     process->Redirect();
 483
 484     long rc = wxExecute(command, wxEXEC_SYNC, process);
 485
 486 #if wxUSE_STREAMS
 487     if ( rc != -1 )
 488     {
 489         if ( !ReadAll(process->GetInputStream(), output) )
 490             rc = -1;
 491
 492         if ( error )
 493         {
 494             if ( !ReadAll(process->GetErrorStream(), *error) )
 495                 rc = -1;
 496         }
 497
 498     }
 499 #endif // wxUSE_STREAMS
 500
 501     delete process;
 502
 503     return rc;
 504 #endif // IO redirection supported
 505 }
 506
 507 long wxExecute(const wxString& command, wxArrayString& output)
 508 {
 509     return wxDoExecuteWithCapture(command, output, NULL);
 510 }
 511
 512 long wxExecute(const wxString& command,
 513                wxArrayString& output,
 514                wxArrayString& error)
 515 {
 516     return wxDoExecuteWithCapture(command, output, &error);
 517 }
 518
 519 // ----------------------------------------------------------------------------
 520 // wxApp::Yield() wrappers for backwards compatibility
 521 // ----------------------------------------------------------------------------
 522
 523 bool wxYield()
 524 {
 525     return wxTheApp && wxTheApp->Yield();
 526 }
 527
 528 bool wxYieldIfNeeded()
 529 {
 530     return wxTheApp && wxTheApp->Yield(TRUE);
 531 }
 532
 533 #endif // __WXBASE__
 534
 535 // ============================================================================
 536 // GUI-only functions from now on
 537 // ============================================================================
 538
 539 #if wxUSE_GUI
 540
 541 #if wxUSE_MENUS
 542
 543 // ----------------------------------------------------------------------------
 544 // Menu accelerators related functions
 545 // ----------------------------------------------------------------------------
 546
 547 wxChar *wxStripMenuCodes(const wxChar *in, wxChar *out)
 548 {
 549     wxString s = wxMenuItem::GetLabelFromText(in);
 550     if ( out )
 551     {
 552         // go smash their buffer if it's not big enough - I love char * params
 553         memcpy(out, s.c_str(), s.length() * sizeof(wxChar));
 554     }
 555     else
 556     {
 557         out = copystring(s);
 558     }
 559
 560     return out;
 561 }
 562
 563 wxString wxStripMenuCodes(const wxString& in)
 564 {
 565     wxString out;
 566
 567     size_t len = in.length();
 568     out.reserve(len);
 569
 570     for ( size_t n = 0; n < len; n++ )
 571     {
 572         wxChar ch = in[n];
 573         if ( ch == _T('&') )
 574         {
 575             // skip it, it is used to introduce the accel char (or to quote
 576             // itself in which case it should still be skipped): note that it
 577             // can't be the last character of the string
 578             if ( ++n == len )
 579             {
 580                 wxLogDebug(_T("Invalid menu string '%s'"), in.c_str());
 581             }
 582             else
 583             {
 584                 // use the next char instead
 585                 ch = in[n];
 586             }
 587         }
 588         else if ( ch == _T('\t') )
 589         {
 590             // everything after TAB is accel string, exit the loop
 591             break;
 592         }
 593
 594         out += ch;
 595     }
 596
 597     return out;
 598 }
 599
 600 #endif // wxUSE_MENUS
 601
 602 // ----------------------------------------------------------------------------
 603 // Window search functions
 604 // ----------------------------------------------------------------------------
 605
 606 /*
 607  * If parent is non-NULL, look through children for a label or title
 608  * matching the specified string. If NULL, look through all top-level windows.
 609  *
 610  */
 611
 612 wxWindow *
 613 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
 614 {
 615     return wxWindow::FindWindowByLabel( title, parent );
 616 }
 617
 618
 619 /*
 620  * If parent is non-NULL, look through children for a name
 621  * matching the specified string. If NULL, look through all top-level windows.
 622  *
 623  */
 624
 625 wxWindow *
 626 wxFindWindowByName (const wxString& name, wxWindow * parent)
 627 {
 628     return wxWindow::FindWindowByName( name, parent );
 629 }
 630
 631 // Returns menu item id or -1 if none.
 632 int
 633 wxFindMenuItemId (wxFrame * frame, const wxString& menuString, const wxString& itemString)
 634 {
 635 #if wxUSE_MENUS
 636   wxMenuBar *menuBar = frame->GetMenuBar ();
 637   if ( menuBar )
 638       return menuBar->FindMenuItem (menuString, itemString);
 639 #endif // wxUSE_MENUS
 640
 641   return -1;
 642 }
 643
 644 // Try to find the deepest child that contains 'pt'.
 645 // We go backwards, to try to allow for controls that are spacially
 646 // within other controls, but are still siblings (e.g. buttons within
 647 // static boxes). Static boxes are likely to be created _before_ controls
 648 // that sit inside them.
 649 wxWindow* wxFindWindowAtPoint(wxWindow* win, const wxPoint& pt)
 650 {
 651     if (!win->IsShown())
 652         return NULL;
 653
 654     // Hack for wxNotebook case: at least in wxGTK, all pages
 655     // claim to be shown, so we must only deal with the selected one.
 656 #if wxUSE_NOTEBOOK
 657     if (win->IsKindOf(CLASSINFO(wxNotebook)))
 658     {
 659       wxNotebook* nb = (wxNotebook*) win;
 660       int sel = nb->GetSelection();
 661       if (sel >= 0)
 662       {
 663         wxWindow* child = nb->GetPage(sel);
 664         wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
 665         if (foundWin)
 666            return foundWin;
 667       }
 668     }
 669 #endif
 670
 671     wxWindowList::Node  *node = win->GetChildren().GetLast();
 672     while (node)
 673     {
 674         wxWindow* child = node->GetData();
 675         wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
 676         if (foundWin)
 677           return foundWin;
 678         node = node->GetPrevious();
 679     }
 680
 681     wxPoint pos = win->GetPosition();
 682     wxSize sz = win->GetSize();
 683     if (win->GetParent())
 684     {
 685         pos = win->GetParent()->ClientToScreen(pos);
 686     }
 687
 688     wxRect rect(pos, sz);
 689     if (rect.Inside(pt))
 690         return win;
 691     else
 692         return NULL;
 693 }
 694
 695 wxWindow* wxGenericFindWindowAtPoint(const wxPoint& pt)
 696 {
 697     // Go backwards through the list since windows
 698     // on top are likely to have been appended most
 699     // recently.
 700     wxWindowList::Node  *node = wxTopLevelWindows.GetLast();
 701     while (node)
 702     {
 703         wxWindow* win = node->GetData();
 704         wxWindow* found = wxFindWindowAtPoint(win, pt);
 705         if (found)
 706             return found;
 707         node = node->GetPrevious();
 708     }
 709     return NULL;
 710 }
 711
 712 // ----------------------------------------------------------------------------
 713 // GUI helpers
 714 // ----------------------------------------------------------------------------
 715
 716 /*
 717  * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
 718  * since otherwise the generic code may be pulled in unnecessarily.
 719  */
 720
 721 #if wxUSE_MSGDLG
 722
 723 int wxMessageBox(const wxString& message, const wxString& caption, long style,
 724                  wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
 725 {
 726     wxMessageDialog dialog(parent, message, caption, style);
 727
 728     int ans = dialog.ShowModal();
 729     switch ( ans )
 730     {
 731         case wxID_OK:
 732             return wxOK;
 733         case wxID_YES:
 734             return wxYES;
 735         case wxID_NO:
 736             return wxNO;
 737         case wxID_CANCEL:
 738             return wxCANCEL;
 739     }
 740
 741     wxFAIL_MSG( _T("unexpected return code from wxMessageDialog") );
 742
 743     return wxCANCEL;
 744 }
 745
 746 #endif // wxUSE_MSGDLG
 747
 748 #if wxUSE_TEXTDLG
 749
 750 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
 751                         const wxString& defaultValue, wxWindow *parent,
 752                         int x, int y, bool WXUNUSED(centre) )
 753 {
 754     wxString str;
 755     wxTextEntryDialog dialog(parent, message, caption, defaultValue, wxOK|wxCANCEL, wxPoint(x, y));
 756     if (dialog.ShowModal() == wxID_OK)
 757     {
 758         str = dialog.GetValue();
 759     }
 760
 761     return str;
 762 }
 763
 764 wxString wxGetPasswordFromUser(const wxString& message,
 765                                const wxString& caption,
 766                                const wxString& defaultValue,
 767                                wxWindow *parent)
 768 {
 769     wxString str;
 770     wxTextEntryDialog dialog(parent, message, caption, defaultValue,
 771                              wxOK | wxCANCEL | wxTE_PASSWORD);
 772     if ( dialog.ShowModal() == wxID_OK )
 773     {
 774         str = dialog.GetValue();
 775     }
 776
 777     return str;
 778 }
 779
 780 #endif // wxUSE_TEXTDLG
 781
 782 #if wxUSE_COLOURDLG
 783
 784 wxColour wxGetColourFromUser(wxWindow *parent, const wxColour& colInit)
 785 {
 786     wxColourData data;
 787     data.SetChooseFull(TRUE);
 788     if ( colInit.Ok() )
 789     {
 790         data.SetColour((wxColour &)colInit); // const_cast
 791     }
 792
 793     wxColour colRet;
 794     wxColourDialog dialog(parent, &data);
 795     if ( dialog.ShowModal() == wxID_OK )
 796     {
 797         colRet = dialog.GetColourData().GetColour();
 798     }
 799     //else: leave it invalid
 800
 801     return colRet;
 802 }
 803
 804 #endif // wxUSE_COLOURDLG
 805
 806 #if wxUSE_FONTDLG
 807
 808 wxFont wxGetFontFromUser(wxWindow *parent, const wxFont& fontInit)
 809 {
 810     wxFontData data;
 811     if ( fontInit.Ok() )
 812     {
 813         data.SetInitialFont(fontInit);
 814     }
 815
 816     wxFont fontRet;
 817     wxFontDialog dialog(parent, data);
 818     if ( dialog.ShowModal() == wxID_OK )
 819     {
 820         fontRet = dialog.GetFontData().GetChosenFont();
 821     }
 822     //else: leave it invalid
 823
 824     return fontRet;
 825 }
 826
 827 #endif // wxUSE_FONTDLG
 828 // ----------------------------------------------------------------------------
 829 // missing C RTL functions (FIXME shouldn't be here at all)
 830 // ----------------------------------------------------------------------------
 831
 832 #if defined( __MWERKS__ ) && !defined(__MACH__)
 833 char *strdup(const char *s)
 834 {
 835         return strcpy( (char*) malloc( strlen( s ) + 1 ) , s ) ;
 836 }
 837 int isascii( int c )
 838 {
 839         return ( c >= 0 && c < 128 ) ;
 840 }
 841 #endif // __MWERKS__
 842
 843 // ----------------------------------------------------------------------------
 844 // wxSafeYield and supporting functions
 845 // ----------------------------------------------------------------------------
 846
 847 void wxEnableTopLevelWindows(bool enable)
 848 {
 849     wxWindowList::Node *node;
 850     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 851         node->GetData()->Enable(enable);
 852 }
 853
 854 wxWindowDisabler::wxWindowDisabler(wxWindow *winToSkip)
 855 {
 856     // remember the top level windows which were already disabled, so that we
 857     // don't reenable them later
 858     m_winDisabled = NULL;
 859
 860     wxWindowList::Node *node;
 861     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 862     {
 863         wxWindow *winTop = node->GetData();
 864         if ( winTop == winToSkip )
 865             continue;
 866
 867         // we don't need to disable the hidden or already disabled windows
 868         if ( winTop->IsEnabled() && winTop->IsShown() )
 869         {
 870             winTop->Disable();
 871         }
 872         else
 873         {
 874             if ( !m_winDisabled )
 875             {
 876                 m_winDisabled = new wxWindowList;
 877             }
 878
 879             m_winDisabled->Append(winTop);
 880         }
 881     }
 882 }
 883
 884 wxWindowDisabler::~wxWindowDisabler()
 885 {
 886     wxWindowList::Node *node;
 887     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 888     {
 889         wxWindow *winTop = node->GetData();
 890         if ( !m_winDisabled || !m_winDisabled->Find(winTop) )
 891         {
 892             winTop->Enable();
 893         }
 894         //else: had been already disabled, don't reenable
 895     }
 896
 897     delete m_winDisabled;
 898 }
 899
 900 // Yield to other apps/messages and disable user input to all windows except
 901 // the given one
 902 bool wxSafeYield(wxWindow *win, bool onlyIfNeeded)
 903 {
 904     wxWindowDisabler wd(win);
 905
 906     bool rc;
 907     if (onlyIfNeeded)
 908         rc = wxYieldIfNeeded();
 909     else
 910         rc = wxYield();
 911
 912     return rc;
 913 }
 914
 915 // Don't synthesize KeyUp events holding down a key and producing KeyDown
 916 // events with autorepeat. On by default and always on in wxMSW. wxGTK version
 917 // in utilsgtk.cpp.
 918 #ifndef __WXGTK__
 919 bool wxSetDetectableAutoRepeat( bool WXUNUSED(flag) )
 920 {
 921     return TRUE;    // detectable auto-repeat is the only mode MSW supports
 922 }
 923 #endif // !wxGTK
 924
 925 #endif // wxUSE_GUI
 926