src/common/utilscmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/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 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/app.h"
  29     #include "wx/string.h"
  30     #include "wx/utils.h"
  31     #include "wx/intl.h"
  32     #include "wx/log.h"
  33
  34     #if wxUSE_GUI
  35         #include "wx/window.h"
  36         #include "wx/frame.h"
  37         #include "wx/menu.h"
  38         #include "wx/msgdlg.h"
  39         #include "wx/textdlg.h"
  40         #include "wx/textctrl.h"    // for wxTE_PASSWORD
  41         #if wxUSE_ACCEL
  42             #include "wx/menuitem.h"
  43             #include "wx/accel.h"
  44         #endif // wxUSE_ACCEL
  45     #endif // wxUSE_GUI
  46 #endif // WX_PRECOMP
  47
  48 #include "wx/apptrait.h"
  49
  50 #include "wx/process.h"
  51 #include "wx/txtstrm.h"
  52 #include "wx/uri.h"
  53 #include "wx/mimetype.h"
  54 #include "wx/config.h"
  55
  56 #if defined(__WXWINCE__) && wxUSE_DATETIME
  57 #include "wx/datetime.h"
  58 #endif
  59
  60 #include <ctype.h>
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <string.h>
  64
  65 #if !wxONLY_WATCOM_EARLIER_THAN(1,4)
  66     #if !(defined(_MSC_VER) && (_MSC_VER > 800))
  67         #include <errno.h>
  68     #endif
  69 #endif
  70
  71 #if wxUSE_GUI
  72     #include "wx/colordlg.h"
  73     #include "wx/fontdlg.h"
  74     #include "wx/notebook.h"
  75     #include "wx/statusbr.h"
  76 #endif // wxUSE_GUI
  77
  78 #ifndef __WXWINCE__
  79 #include <time.h>
  80 #else
  81 #include "wx/msw/wince/time.h"
  82 #endif
  83
  84 #ifdef __WXMAC__
  85 #include "wx/mac/private.h"
  86 #ifndef __DARWIN__
  87 #include "InternetConfig.h"
  88 #endif
  89 #endif
  90
  91 #if !defined(__MWERKS__) && !defined(__WXWINCE__)
  92     #include <sys/types.h>
  93     #include <sys/stat.h>
  94 #endif
  95
  96 #if defined(__WXMSW__)
  97     #include "wx/msw/private.h"
  98     #include "wx/msw/registry.h"
  99     #include <shellapi.h> // needed for SHELLEXECUTEINFO
 100 #endif
 101
 102 #if wxUSE_BASE
 103
 104 // ----------------------------------------------------------------------------
 105 // common data
 106 // ----------------------------------------------------------------------------
 107
 108 // ============================================================================
 109 // implementation
 110 // ============================================================================
 111
 112 // Array used in DecToHex conversion routine.
 113 static wxChar hexArray[] = wxT("0123456789ABCDEF");
 114
 115 // Convert 2-digit hex number to decimal
 116 int wxHexToDec(const wxString& buf)
 117 {
 118     int firstDigit, secondDigit;
 119
 120     if (buf.GetChar(0) >= wxT('A'))
 121         firstDigit = buf.GetChar(0) - wxT('A') + 10;
 122     else
 123        firstDigit = buf.GetChar(0) - wxT('0');
 124
 125     if (buf.GetChar(1) >= wxT('A'))
 126         secondDigit = buf.GetChar(1) - wxT('A') + 10;
 127     else
 128         secondDigit = buf.GetChar(1) - wxT('0');
 129
 130     return (firstDigit & 0xF) * 16 + (secondDigit & 0xF );
 131 }
 132
 133 // Convert decimal integer to 2-character hex string
 134 void wxDecToHex(int dec, wxChar *buf)
 135 {
 136     int firstDigit = (int)(dec/16.0);
 137     int secondDigit = (int)(dec - (firstDigit*16.0));
 138     buf[0] = hexArray[firstDigit];
 139     buf[1] = hexArray[secondDigit];
 140     buf[2] = 0;
 141 }
 142
 143 // Convert decimal integer to 2-character hex string
 144 wxString wxDecToHex(int dec)
 145 {
 146     wxChar buf[3];
 147     wxDecToHex(dec, buf);
 148     return wxString(buf);
 149 }
 150
 151 // ----------------------------------------------------------------------------
 152 // misc functions
 153 // ----------------------------------------------------------------------------
 154
 155 // Return the current date/time
 156 wxString wxNow()
 157 {
 158 #ifdef __WXWINCE__
 159 #if wxUSE_DATETIME
 160     wxDateTime now = wxDateTime::Now();
 161     return now.Format();
 162 #else
 163     return wxEmptyString;
 164 #endif
 165 #else
 166     time_t now = time((time_t *) NULL);
 167     char *date = ctime(&now);
 168     date[24] = '\0';
 169     return wxString::FromAscii(date);
 170 #endif
 171 }
 172
 173 void wxUsleep(unsigned long milliseconds)
 174 {
 175     wxMilliSleep(milliseconds);
 176 }
 177
 178 const wxChar *wxGetInstallPrefix()
 179 {
 180     wxString prefix;
 181
 182     if ( wxGetEnv(wxT("WXPREFIX"), &prefix) )
 183         return prefix.c_str();
 184
 185 #ifdef wxINSTALL_PREFIX
 186     return wxT(wxINSTALL_PREFIX);
 187 #else
 188     return wxEmptyString;
 189 #endif
 190 }
 191
 192 wxString wxGetDataDir()
 193 {
 194     wxString dir = wxGetInstallPrefix();
 195     dir <<  wxFILE_SEP_PATH << wxT("share") << wxFILE_SEP_PATH << wxT("wx");
 196     return dir;
 197 }
 198
 199 bool wxIsPlatformLittleEndian()
 200 {
 201     // Are we little or big endian? This method is from Harbison & Steele.
 202     union
 203     {
 204         long l;
 205         char c[sizeof(long)];
 206     } u;
 207     u.l = 1;
 208
 209     return u.c[0] == 1;
 210 }
 211
 212
 213 /*
 214  * Class to make it easier to specify platform-dependent values
 215  */
 216
 217 wxArrayInt*  wxPlatform::sm_customPlatforms = NULL;
 218
 219 void wxPlatform::Copy(const wxPlatform& platform)
 220 {
 221     m_longValue = platform.m_longValue;
 222     m_doubleValue = platform.m_doubleValue;
 223     m_stringValue = platform.m_stringValue;
 224 }
 225
 226 wxPlatform wxPlatform::If(int platform, long value)
 227 {
 228     if (Is(platform))
 229         return wxPlatform(value);
 230     else
 231         return wxPlatform();
 232 }
 233
 234 wxPlatform wxPlatform::IfNot(int platform, long value)
 235 {
 236     if (!Is(platform))
 237         return wxPlatform(value);
 238     else
 239         return wxPlatform();
 240 }
 241
 242 wxPlatform& wxPlatform::ElseIf(int platform, long value)
 243 {
 244     if (Is(platform))
 245         m_longValue = value;
 246     return *this;
 247 }
 248
 249 wxPlatform& wxPlatform::ElseIfNot(int platform, long value)
 250 {
 251     if (!Is(platform))
 252         m_longValue = value;
 253     return *this;
 254 }
 255
 256 wxPlatform wxPlatform::If(int platform, double value)
 257 {
 258     if (Is(platform))
 259         return wxPlatform(value);
 260     else
 261         return wxPlatform();
 262 }
 263
 264 wxPlatform wxPlatform::IfNot(int platform, double value)
 265 {
 266     if (!Is(platform))
 267         return wxPlatform(value);
 268     else
 269         return wxPlatform();
 270 }
 271
 272 wxPlatform& wxPlatform::ElseIf(int platform, double value)
 273 {
 274     if (Is(platform))
 275         m_doubleValue = value;
 276     return *this;
 277 }
 278
 279 wxPlatform& wxPlatform::ElseIfNot(int platform, double value)
 280 {
 281     if (!Is(platform))
 282         m_doubleValue = value;
 283     return *this;
 284 }
 285
 286 wxPlatform wxPlatform::If(int platform, const wxString& value)
 287 {
 288     if (Is(platform))
 289         return wxPlatform(value);
 290     else
 291         return wxPlatform();
 292 }
 293
 294 wxPlatform wxPlatform::IfNot(int platform, const wxString& value)
 295 {
 296     if (!Is(platform))
 297         return wxPlatform(value);
 298     else
 299         return wxPlatform();
 300 }
 301
 302 wxPlatform& wxPlatform::ElseIf(int platform, const wxString& value)
 303 {
 304     if (Is(platform))
 305         m_stringValue = value;
 306     return *this;
 307 }
 308
 309 wxPlatform& wxPlatform::ElseIfNot(int platform, const wxString& value)
 310 {
 311     if (!Is(platform))
 312         m_stringValue = value;
 313     return *this;
 314 }
 315
 316 wxPlatform& wxPlatform::Else(long value)
 317 {
 318     m_longValue = value;
 319     return *this;
 320 }
 321
 322 wxPlatform& wxPlatform::Else(double value)
 323 {
 324     m_doubleValue = value;
 325     return *this;
 326 }
 327
 328 wxPlatform& wxPlatform::Else(const wxString& value)
 329 {
 330     m_stringValue = value;
 331     return *this;
 332 }
 333
 334 void wxPlatform::AddPlatform(int platform)
 335 {
 336     if (!sm_customPlatforms)
 337         sm_customPlatforms = new wxArrayInt;
 338     sm_customPlatforms->Add(platform);
 339 }
 340
 341 void wxPlatform::ClearPlatforms()
 342 {
 343     delete sm_customPlatforms;
 344     sm_customPlatforms = NULL;
 345 }
 346
 347 /// Function for testing current platform
 348
 349 bool wxPlatform::Is(int platform)
 350 {
 351 #ifdef __WXMSW__
 352     if (platform == wxOS_WINDOWS)
 353         return true;
 354 #endif
 355 #ifdef __WXWINCE__
 356     if (platform == wxOS_WINDOWS_CE)
 357         return true;
 358 #endif
 359
 360 #if 0
 361
 362 // FIXME: wxWinPocketPC and wxWinSmartPhone are unknown symbols
 363
 364 #if defined(__WXWINCE__) && defined(__POCKETPC__)
 365     if (platform == wxWinPocketPC)
 366         return true;
 367 #endif
 368 #if defined(__WXWINCE__) && defined(__SMARTPHONE__)
 369     if (platform == wxWinSmartPhone)
 370         return true;
 371 #endif
 372
 373 #endif
 374
 375 #ifdef __WXGTK__
 376     if (platform == wxPORT_GTK)
 377         return true;
 378 #endif
 379 #ifdef __WXMAC__
 380     if (platform == wxPORT_MAC)
 381         return true;
 382 #endif
 383 #ifdef __WXX11__
 384     if (platform == wxPORT_X11)
 385         return true;
 386 #endif
 387 #ifdef __UNIX__
 388     if (platform == wxOS_UNIX)
 389         return true;
 390 #endif
 391 #ifdef __WXMGL__
 392     if (platform == wxPORT_MGL)
 393         return true;
 394 #endif
 395 #ifdef __OS2__
 396     if (platform == wxOS_OS2)
 397         return true;
 398 #endif
 399 #ifdef __WXPM__
 400     if (platform == wxPORT_PM)
 401         return true;
 402 #endif
 403 #ifdef __WXCOCOA__
 404     if (platform == wxPORT_MAC)
 405         return true;
 406 #endif
 407
 408     if (sm_customPlatforms && sm_customPlatforms->Index(platform) != wxNOT_FOUND)
 409         return true;
 410
 411     return false;
 412 }
 413
 414 // ----------------------------------------------------------------------------
 415 // network and user id functions
 416 // ----------------------------------------------------------------------------
 417
 418 // Get Full RFC822 style email address
 419 bool wxGetEmailAddress(wxChar *address, int maxSize)
 420 {
 421     wxString email = wxGetEmailAddress();
 422     if ( !email )
 423         return false;
 424
 425     wxStrncpy(address, email, maxSize - 1);
 426     address[maxSize - 1] = wxT('\0');
 427
 428     return true;
 429 }
 430
 431 wxString wxGetEmailAddress()
 432 {
 433     wxString email;
 434
 435     wxString host = wxGetFullHostName();
 436     if ( !host.empty() )
 437     {
 438         wxString user = wxGetUserId();
 439         if ( !user.empty() )
 440         {
 441             email << user << wxT('@') << host;
 442         }
 443     }
 444
 445     return email;
 446 }
 447
 448 wxString wxGetUserId()
 449 {
 450     static const int maxLoginLen = 256; // FIXME arbitrary number
 451
 452     wxString buf;
 453     bool ok = wxGetUserId(wxStringBuffer(buf, maxLoginLen), maxLoginLen);
 454
 455     if ( !ok )
 456         buf.Empty();
 457
 458     return buf;
 459 }
 460
 461 wxString wxGetUserName()
 462 {
 463     static const int maxUserNameLen = 1024; // FIXME arbitrary number
 464
 465     wxString buf;
 466     bool ok = wxGetUserName(wxStringBuffer(buf, maxUserNameLen), maxUserNameLen);
 467
 468     if ( !ok )
 469         buf.Empty();
 470
 471     return buf;
 472 }
 473
 474 wxString wxGetHostName()
 475 {
 476     static const size_t hostnameSize = 257;
 477
 478     wxString buf;
 479     bool ok = wxGetHostName(wxStringBuffer(buf, hostnameSize), hostnameSize);
 480
 481     if ( !ok )
 482         buf.Empty();
 483
 484     return buf;
 485 }
 486
 487 wxString wxGetFullHostName()
 488 {
 489     static const size_t hostnameSize = 257;
 490
 491     wxString buf;
 492     bool ok = wxGetFullHostName(wxStringBuffer(buf, hostnameSize), hostnameSize);
 493
 494     if ( !ok )
 495         buf.Empty();
 496
 497     return buf;
 498 }
 499
 500 wxString wxGetHomeDir()
 501 {
 502     wxString home;
 503     wxGetHomeDir(&home);
 504
 505     return home;
 506 }
 507
 508 #if 0
 509
 510 wxString wxGetCurrentDir()
 511 {
 512     wxString dir;
 513     size_t len = 1024;
 514     bool ok;
 515     do
 516     {
 517         ok = getcwd(dir.GetWriteBuf(len + 1), len) != NULL;
 518         dir.UngetWriteBuf();
 519
 520         if ( !ok )
 521         {
 522             if ( errno != ERANGE )
 523             {
 524                 wxLogSysError(_T("Failed to get current directory"));
 525
 526                 return wxEmptyString;
 527             }
 528             else
 529             {
 530                 // buffer was too small, retry with a larger one
 531                 len *= 2;
 532             }
 533         }
 534         //else: ok
 535     } while ( !ok );
 536
 537     return dir;
 538 }
 539
 540 #endif // 0
 541
 542 // ----------------------------------------------------------------------------
 543 // wxExecute
 544 // ----------------------------------------------------------------------------
 545
 546 // wxDoExecuteWithCapture() helper: reads an entire stream into one array
 547 //
 548 // returns true if ok, false if error
 549 #if wxUSE_STREAMS
 550 static bool ReadAll(wxInputStream *is, wxArrayString& output)
 551 {
 552     wxCHECK_MSG( is, false, _T("NULL stream in wxExecute()?") );
 553
 554     // the stream could be already at EOF or in wxSTREAM_BROKEN_PIPE state
 555     is->Reset();
 556
 557     wxTextInputStream tis(*is);
 558
 559     bool cont = true;
 560     while ( cont )
 561     {
 562         wxString line = tis.ReadLine();
 563         if ( is->Eof() )
 564             break;
 565
 566         if ( !*is )
 567         {
 568             cont = false;
 569         }
 570         else
 571         {
 572             output.Add(line);
 573         }
 574     }
 575
 576     return cont;
 577 }
 578 #endif // wxUSE_STREAMS
 579
 580 // this is a private function because it hasn't a clean interface: the first
 581 // array is passed by reference, the second by pointer - instead we have 2
 582 // public versions of wxExecute() below
 583 static long wxDoExecuteWithCapture(const wxString& command,
 584                                    wxArrayString& output,
 585                                    wxArrayString* error,
 586                                    int flags)
 587 {
 588     // create a wxProcess which will capture the output
 589     wxProcess *process = new wxProcess;
 590     process->Redirect();
 591
 592     long rc = wxExecute(command, wxEXEC_SYNC | flags, process);
 593
 594 #if wxUSE_STREAMS
 595     if ( rc != -1 )
 596     {
 597         if ( !ReadAll(process->GetInputStream(), output) )
 598             rc = -1;
 599
 600         if ( error )
 601         {
 602             if ( !ReadAll(process->GetErrorStream(), *error) )
 603                 rc = -1;
 604         }
 605
 606     }
 607 #else
 608     wxUnusedVar(output);
 609     wxUnusedVar(error);
 610 #endif // wxUSE_STREAMS/!wxUSE_STREAMS
 611
 612     delete process;
 613
 614     return rc;
 615 }
 616
 617 long wxExecute(const wxString& command, wxArrayString& output, int flags)
 618 {
 619     return wxDoExecuteWithCapture(command, output, NULL, flags);
 620 }
 621
 622 long wxExecute(const wxString& command,
 623                wxArrayString& output,
 624                wxArrayString& error,
 625                int flags)
 626 {
 627     return wxDoExecuteWithCapture(command, output, &error, flags);
 628 }
 629
 630 // ----------------------------------------------------------------------------
 631 // Launch default browser
 632 // ----------------------------------------------------------------------------
 633
 634 bool wxLaunchDefaultBrowser(const wxString& urlOrig, int flags)
 635 {
 636     wxUnusedVar(flags);
 637
 638     // set the scheme of url to http if it does not have one
 639     // RR: This doesn't work if the url is just a local path
 640     wxString url(urlOrig);
 641     wxURI uri(url);
 642     if ( !uri.HasScheme() )
 643         url.Prepend(wxT("http://"));
 644
 645
 646 #if defined(__WXMSW__)
 647
 648 #if wxUSE_IPC
 649     if ( flags & wxBROWSER_NEW_WINDOW )
 650     {
 651         // ShellExecuteEx() opens the URL in an existing window by default so
 652         // we can't use it if we need a new window
 653         wxRegKey key(wxRegKey::HKCR, uri.GetScheme() + _T("\\shell\\open"));
 654         if ( !key.Exists() )
 655         {
 656             // try default browser, it must be registered at least for http URLs
 657             key.SetName(wxRegKey::HKCR, _T("http\\shell\\open"));
 658         }
 659
 660         if ( key.Exists() )
 661         {
 662             wxRegKey keyDDE(key, wxT("DDEExec"));
 663             if ( keyDDE.Exists() )
 664             {
 665                 const wxString ddeTopic = wxRegKey(keyDDE, wxT("topic"));
 666
 667                 // we only know the syntax of WWW_OpenURL DDE request for IE,
 668                 // optimistically assume that all other browsers are compatible
 669                 // with it
 670                 wxString ddeCmd;
 671                 bool ok = ddeTopic == wxT("WWW_OpenURL");
 672                 if ( ok )
 673                 {
 674                     ddeCmd = keyDDE.QueryDefaultValue();
 675                     ok = !ddeCmd.empty();
 676                 }
 677
 678                 if ( ok )
 679                 {
 680                     // for WWW_OpenURL, the index of the window to open the URL
 681                     // in is -1 (meaning "current") by default, replace it with
 682                     // 0 which means "new" (see KB article 160957)
 683                     ok = ddeCmd.Replace(wxT("-1"), wxT("0"),
 684                                         false /* only first occurence */) == 1;
 685                 }
 686
 687                 if ( ok )
 688                 {
 689                     // and also replace the parameters: the topic should
 690                     // contain a placeholder for the URL
 691                     ok = ddeCmd.Replace(wxT("%1"), url, false) == 1;
 692                 }
 693
 694                 if ( ok )
 695                 {
 696                     // try to send it the DDE request now but ignore the errors
 697                     wxLogNull noLog;
 698
 699                     const wxString ddeServer = wxRegKey(keyDDE, wxT("application"));
 700                     if ( wxExecuteDDE(ddeServer, ddeTopic, ddeCmd) )
 701                         return true;
 702
 703                     // this is not necessarily an error: maybe browser is
 704                     // simply not running, but no matter, in any case we're
 705                     // going to launch it using ShellExecuteEx() below now and
 706                     // we shouldn't try to open a new window if we open a new
 707                     // browser anyhow
 708                 }
 709             }
 710         }
 711     }
 712 #endif // wxUSE_IPC
 713
 714     WinStruct<SHELLEXECUTEINFO> sei;
 715     sei.lpFile = url.c_str();
 716     sei.lpVerb = _T("open");
 717     sei.nShow = SW_SHOWNORMAL;
 718
 719     ::ShellExecuteEx(&sei);
 720
 721     const int nResult = (int) sei.hInstApp;
 722
 723     // Firefox returns file not found for some reason, so make an exception
 724     // for it
 725     if ( nResult > 32 || nResult == SE_ERR_FNF )
 726     {
 727 #ifdef __WXDEBUG__
 728         // Log something if SE_ERR_FNF happens
 729         if ( nResult == SE_ERR_FNF )
 730             wxLogDebug(wxT("SE_ERR_FNF from ShellExecute -- maybe FireFox?"));
 731 #endif // __WXDEBUG__
 732         return true;
 733     }
 734 #elif defined(__WXMAC__)
 735     OSStatus err;
 736     ICInstance inst;
 737     long int startSel;
 738     long int endSel;
 739
 740     err = ICStart(&inst, 'STKA'); // put your app creator code here
 741     if (err == noErr)
 742     {
 743 #if !TARGET_CARBON
 744         err = ICFindConfigFile(inst, 0, NULL);
 745 #endif
 746         if (err == noErr)
 747         {
 748             ConstStr255Param hint = 0;
 749             startSel = 0;
 750             endSel = url.length();
 751             err = ICLaunchURL(inst, hint, url.fn_str(), endSel, &startSel, &endSel);
 752             if (err != noErr)
 753                 wxLogDebug(wxT("ICLaunchURL error %d"), (int) err);
 754         }
 755         ICStop(inst);
 756         return true;
 757     }
 758     else
 759     {
 760         wxLogDebug(wxT("ICStart error %d"), (int) err);
 761         return false;
 762     }
 763 #else
 764     // (non-Mac, non-MSW)
 765
 766 #ifdef __UNIX__
 767
 768     wxString desktop = wxTheApp->GetTraits()->GetDesktopEnvironment();
 769
 770     // GNOME and KDE desktops have some applications which should be always installed
 771     // together with their main parts, which give us the
 772     if (desktop == wxT("GNOME"))
 773     {
 774         wxArrayString errors;
 775         wxArrayString output;
 776
 777         // gconf will tell us the path of the application to use as browser
 778         long res = wxExecute( wxT("gconftool-2 --get /desktop/gnome/applications/browser/exec"),
 779                               output, errors, wxEXEC_NODISABLE );
 780         if (res >= 0 && errors.GetCount() == 0)
 781         {
 782             wxString cmd = output[0];
 783             cmd << _T(' ') << url;
 784             if (wxExecute(cmd))
 785                 return true;
 786         }
 787     }
 788     else if (desktop == wxT("KDE"))
 789     {
 790         // kfmclient directly opens the given URL
 791         if (wxExecute(wxT("kfmclient openURL ") + url))
 792             return true;
 793     }
 794 #endif
 795
 796     bool ok = false;
 797     wxString cmd;
 798
 799 #if wxUSE_MIMETYPE
 800     wxFileType *ft = wxTheMimeTypesManager->GetFileTypeFromExtension(_T("html"));
 801     if ( ft )
 802     {
 803         wxString mt;
 804         ft->GetMimeType(&mt);
 805
 806         ok = ft->GetOpenCommand(&cmd, wxFileType::MessageParameters(url));
 807         delete ft;
 808     }
 809 #endif // wxUSE_MIMETYPE
 810
 811     if ( !ok || cmd.empty() )
 812     {
 813         // fallback to checking for the BROWSER environment variable
 814         cmd = wxGetenv(wxT("BROWSER"));
 815         if ( !cmd.empty() )
 816             cmd << _T(' ') << url;
 817     }
 818
 819     ok = ( !cmd.empty() && wxExecute(cmd) );
 820     if (ok)
 821         return ok;
 822
 823     // no file type for HTML extension
 824     wxLogError(_T("No default application configured for HTML files."));
 825
 826 #endif // !wxUSE_MIMETYPE && !__WXMSW__
 827
 828     wxLogSysError(_T("Failed to open URL \"%s\" in default browser."),
 829                   url.c_str());
 830
 831     return false;
 832 }
 833
 834 // ----------------------------------------------------------------------------
 835 // wxApp::Yield() wrappers for backwards compatibility
 836 // ----------------------------------------------------------------------------
 837
 838 bool wxYield()
 839 {
 840     return wxTheApp && wxTheApp->Yield();
 841 }
 842
 843 bool wxYieldIfNeeded()
 844 {
 845     return wxTheApp && wxTheApp->Yield(true);
 846 }
 847
 848 #endif // wxUSE_BASE
 849
 850 // ============================================================================
 851 // GUI-only functions from now on
 852 // ============================================================================
 853
 854 #if wxUSE_GUI
 855
 856 // Id generation
 857 static long wxCurrentId = 100;
 858
 859 long wxNewId()
 860 {
 861     // skip the part of IDs space that contains hard-coded values:
 862     if (wxCurrentId == wxID_LOWEST)
 863         wxCurrentId = wxID_HIGHEST + 1;
 864
 865     return wxCurrentId++;
 866 }
 867
 868 long
 869 wxGetCurrentId(void) { return wxCurrentId; }
 870
 871 void
 872 wxRegisterId (long id)
 873 {
 874   if (id >= wxCurrentId)
 875     wxCurrentId = id + 1;
 876 }
 877
 878 // ----------------------------------------------------------------------------
 879 // Menu accelerators related functions
 880 // ----------------------------------------------------------------------------
 881
 882 wxChar *wxStripMenuCodes(const wxChar *in, wxChar *out)
 883 {
 884 #if wxUSE_MENUS
 885     wxString s = wxMenuItem::GetLabelFromText(in);
 886 #else
 887     wxString str(in);
 888     wxString s = wxStripMenuCodes(str);
 889 #endif // wxUSE_MENUS
 890     if ( out )
 891     {
 892         // go smash their buffer if it's not big enough - I love char * params
 893         memcpy(out, s.c_str(), s.length() * sizeof(wxChar));
 894     }
 895     else
 896     {
 897         out = new wxChar[s.length() + 1];
 898         wxStrcpy(out, s.c_str());
 899     }
 900
 901     return out;
 902 }
 903
 904 wxString wxStripMenuCodes(const wxString& in, int flags)
 905 {
 906     wxASSERT_MSG( flags, _T("this is useless to call without any flags") );
 907
 908     wxString out;
 909
 910     size_t len = in.length();
 911     out.reserve(len);
 912
 913     for ( size_t n = 0; n < len; n++ )
 914     {
 915         wxChar ch = in[n];
 916         if ( (flags & wxStrip_Mnemonics) && ch == _T('&') )
 917         {
 918             // skip it, it is used to introduce the accel char (or to quote
 919             // itself in which case it should still be skipped): note that it
 920             // can't be the last character of the string
 921             if ( ++n == len )
 922             {
 923                 wxLogDebug(_T("Invalid menu string '%s'"), in.c_str());
 924             }
 925             else
 926             {
 927                 // use the next char instead
 928                 ch = in[n];
 929             }
 930         }
 931         else if ( (flags & wxStrip_Accel) && ch == _T('\t') )
 932         {
 933             // everything after TAB is accel string, exit the loop
 934             break;
 935         }
 936
 937         out += ch;
 938     }
 939
 940     return out;
 941 }
 942
 943 // ----------------------------------------------------------------------------
 944 // Window search functions
 945 // ----------------------------------------------------------------------------
 946
 947 /*
 948  * If parent is non-NULL, look through children for a label or title
 949  * matching the specified string. If NULL, look through all top-level windows.
 950  *
 951  */
 952
 953 wxWindow *
 954 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
 955 {
 956     return wxWindow::FindWindowByLabel( title, parent );
 957 }
 958
 959
 960 /*
 961  * If parent is non-NULL, look through children for a name
 962  * matching the specified string. If NULL, look through all top-level windows.
 963  *
 964  */
 965
 966 wxWindow *
 967 wxFindWindowByName (const wxString& name, wxWindow * parent)
 968 {
 969     return wxWindow::FindWindowByName( name, parent );
 970 }
 971
 972 // Returns menu item id or wxNOT_FOUND if none.
 973 int
 974 wxFindMenuItemId (wxFrame * frame, const wxString& menuString, const wxString& itemString)
 975 {
 976 #if wxUSE_MENUS
 977     wxMenuBar *menuBar = frame->GetMenuBar ();
 978     if ( menuBar )
 979         return menuBar->FindMenuItem (menuString, itemString);
 980 #endif // wxUSE_MENUS
 981
 982     return wxNOT_FOUND;
 983 }
 984
 985 // Try to find the deepest child that contains 'pt'.
 986 // We go backwards, to try to allow for controls that are spacially
 987 // within other controls, but are still siblings (e.g. buttons within
 988 // static boxes). Static boxes are likely to be created _before_ controls
 989 // that sit inside them.
 990 wxWindow* wxFindWindowAtPoint(wxWindow* win, const wxPoint& pt)
 991 {
 992     if (!win->IsShown())
 993         return NULL;
 994
 995     // Hack for wxNotebook case: at least in wxGTK, all pages
 996     // claim to be shown, so we must only deal with the selected one.
 997 #if wxUSE_NOTEBOOK
 998     if (win->IsKindOf(CLASSINFO(wxNotebook)))
 999     {
1000       wxNotebook* nb = (wxNotebook*) win;
1001       int sel = nb->GetSelection();
1002       if (sel >= 0)
1003       {
1004         wxWindow* child = nb->GetPage(sel);
1005         wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
1006         if (foundWin)
1007            return foundWin;
1008       }
1009     }
1010 #endif
1011
1012     wxWindowList::compatibility_iterator node = win->GetChildren().GetLast();
1013     while (node)
1014     {
1015         wxWindow* child = node->GetData();
1016         wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
1017         if (foundWin)
1018           return foundWin;
1019         node = node->GetPrevious();
1020     }
1021
1022     wxPoint pos = win->GetPosition();
1023     wxSize sz = win->GetSize();
1024     if ( !win->IsTopLevel() && win->GetParent() )
1025     {
1026         pos = win->GetParent()->ClientToScreen(pos);
1027     }
1028
1029     wxRect rect(pos, sz);
1030     if (rect.Contains(pt))
1031         return win;
1032
1033     return NULL;
1034 }
1035
1036 wxWindow* wxGenericFindWindowAtPoint(const wxPoint& pt)
1037 {
1038     // Go backwards through the list since windows
1039     // on top are likely to have been appended most
1040     // recently.
1041     wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetLast();
1042     while (node)
1043     {
1044         wxWindow* win = node->GetData();
1045         wxWindow* found = wxFindWindowAtPoint(win, pt);
1046         if (found)
1047             return found;
1048         node = node->GetPrevious();
1049     }
1050     return NULL;
1051 }
1052
1053 // ----------------------------------------------------------------------------
1054 // GUI helpers
1055 // ----------------------------------------------------------------------------
1056
1057 /*
1058  * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
1059  * since otherwise the generic code may be pulled in unnecessarily.
1060  */
1061
1062 #if wxUSE_MSGDLG
1063
1064 int wxMessageBox(const wxString& message, const wxString& caption, long style,
1065                  wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
1066 {
1067     long decorated_style = style;
1068
1069     if ( ( style & ( wxICON_EXCLAMATION | wxICON_HAND | wxICON_INFORMATION | wxICON_QUESTION ) ) == 0 )
1070     {
1071         decorated_style |= ( style & wxYES ) ? wxICON_QUESTION : wxICON_INFORMATION ;
1072     }
1073
1074     wxMessageDialog dialog(parent, message, caption, decorated_style);
1075
1076     int ans = dialog.ShowModal();
1077     switch ( ans )
1078     {
1079         case wxID_OK:
1080             return wxOK;
1081         case wxID_YES:
1082             return wxYES;
1083         case wxID_NO:
1084             return wxNO;
1085         case wxID_CANCEL:
1086             return wxCANCEL;
1087     }
1088
1089     wxFAIL_MSG( _T("unexpected return code from wxMessageDialog") );
1090
1091     return wxCANCEL;
1092 }
1093
1094 #endif // wxUSE_MSGDLG
1095
1096 #if wxUSE_TEXTDLG
1097
1098 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
1099                         const wxString& defaultValue, wxWindow *parent,
1100                         wxCoord x, wxCoord y, bool centre )
1101 {
1102     wxString str;
1103     long style = wxTextEntryDialogStyle;
1104
1105     if (centre)
1106         style |= wxCENTRE;
1107     else
1108         style &= ~wxCENTRE;
1109
1110     wxTextEntryDialog dialog(parent, message, caption, defaultValue, style, wxPoint(x, y));
1111
1112     if (dialog.ShowModal() == wxID_OK)
1113     {
1114         str = dialog.GetValue();
1115     }
1116
1117     return str;
1118 }
1119
1120 wxString wxGetPasswordFromUser(const wxString& message,
1121                                const wxString& caption,
1122                                const wxString& defaultValue,
1123                                wxWindow *parent,
1124                                wxCoord x, wxCoord y, bool centre )
1125 {
1126     wxString str;
1127     long style = wxTextEntryDialogStyle;
1128
1129     if (centre)
1130         style |= wxCENTRE;
1131     else
1132         style &= ~wxCENTRE;
1133
1134     wxPasswordEntryDialog dialog(parent, message, caption, defaultValue,
1135                              style, wxPoint(x, y));
1136     if ( dialog.ShowModal() == wxID_OK )
1137     {
1138         str = dialog.GetValue();
1139     }
1140
1141     return str;
1142 }
1143
1144 #endif // wxUSE_TEXTDLG
1145
1146 #if wxUSE_COLOURDLG
1147
1148 wxColour wxGetColourFromUser(wxWindow *parent, const wxColour& colInit, const wxString& caption)
1149 {
1150     wxColourData data;
1151     data.SetChooseFull(true);
1152     if ( colInit.Ok() )
1153     {
1154         data.SetColour((wxColour &)colInit); // const_cast
1155     }
1156
1157     wxColour colRet;
1158     wxColourDialog dialog(parent, &data);
1159     if (!caption.empty())
1160         dialog.SetTitle(caption);
1161     if ( dialog.ShowModal() == wxID_OK )
1162     {
1163         colRet = dialog.GetColourData().GetColour();
1164     }
1165     //else: leave it invalid
1166
1167     return colRet;
1168 }
1169
1170 #endif // wxUSE_COLOURDLG
1171
1172 #if wxUSE_FONTDLG
1173
1174 wxFont wxGetFontFromUser(wxWindow *parent, const wxFont& fontInit, const wxString& caption)
1175 {
1176     wxFontData data;
1177     if ( fontInit.Ok() )
1178     {
1179         data.SetInitialFont(fontInit);
1180     }
1181
1182     wxFont fontRet;
1183     wxFontDialog dialog(parent, data);
1184     if (!caption.empty())
1185         dialog.SetTitle(caption);
1186     if ( dialog.ShowModal() == wxID_OK )
1187     {
1188         fontRet = dialog.GetFontData().GetChosenFont();
1189     }
1190     //else: leave it invalid
1191
1192     return fontRet;
1193 }
1194
1195 #endif // wxUSE_FONTDLG
1196
1197 // ----------------------------------------------------------------------------
1198 // wxSafeYield and supporting functions
1199 // ----------------------------------------------------------------------------
1200
1201 void wxEnableTopLevelWindows(bool enable)
1202 {
1203     wxWindowList::compatibility_iterator node;
1204     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
1205         node->GetData()->Enable(enable);
1206 }
1207
1208 wxWindowDisabler::wxWindowDisabler(wxWindow *winToSkip)
1209 {
1210     // remember the top level windows which were already disabled, so that we
1211     // don't reenable them later
1212     m_winDisabled = NULL;
1213
1214     wxWindowList::compatibility_iterator node;
1215     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
1216     {
1217         wxWindow *winTop = node->GetData();
1218         if ( winTop == winToSkip )
1219             continue;
1220
1221         // we don't need to disable the hidden or already disabled windows
1222         if ( winTop->IsEnabled() && winTop->IsShown() )
1223         {
1224             winTop->Disable();
1225         }
1226         else
1227         {
1228             if ( !m_winDisabled )
1229             {
1230                 m_winDisabled = new wxWindowList;
1231             }
1232
1233             m_winDisabled->Append(winTop);
1234         }
1235     }
1236 }
1237
1238 wxWindowDisabler::~wxWindowDisabler()
1239 {
1240     wxWindowList::compatibility_iterator node;
1241     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
1242     {
1243         wxWindow *winTop = node->GetData();
1244         if ( !m_winDisabled || !m_winDisabled->Find(winTop) )
1245         {
1246             winTop->Enable();
1247         }
1248         //else: had been already disabled, don't reenable
1249     }
1250
1251     delete m_winDisabled;
1252 }
1253
1254 // Yield to other apps/messages and disable user input to all windows except
1255 // the given one
1256 bool wxSafeYield(wxWindow *win, bool onlyIfNeeded)
1257 {
1258     wxWindowDisabler wd(win);
1259
1260     bool rc;
1261     if (onlyIfNeeded)
1262         rc = wxYieldIfNeeded();
1263     else
1264         rc = wxYield();
1265
1266     return rc;
1267 }
1268
1269 // Don't synthesize KeyUp events holding down a key and producing KeyDown
1270 // events with autorepeat. On by default and always on in wxMSW. wxGTK version
1271 // in utilsgtk.cpp.
1272 #ifndef __WXGTK__
1273 bool wxSetDetectableAutoRepeat( bool WXUNUSED(flag) )
1274 {
1275     return true;    // detectable auto-repeat is the only mode MSW supports
1276 }
1277 #endif // !wxGTK
1278
1279 #endif // wxUSE_GUI