src/gtk/utilsgtk.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/utilsgtk.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/utils.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/string.h"
  17     #include "wx/intl.h"
  18     #include "wx/log.h"
  19 #endif
  20
  21 #include "wx/apptrait.h"
  22 #include "wx/process.h"
  23 #include "wx/sysopt.h"
  24 #ifdef __UNIX__
  25 #include "wx/unix/execute.h"
  26 #endif
  27
  28 #include "wx/gtk/private/timer.h"
  29 #include "wx/evtloop.h"
  30
  31 #include <gtk/gtk.h>
  32 #ifdef GDK_WINDOWING_WIN32
  33 #include <gdk/gdkwin32.h>
  34 #endif
  35 #ifdef GDK_WINDOWING_X11
  36 #include <gdk/gdkx.h>
  37 #endif
  38
  39 #if wxDEBUG_LEVEL
  40     #include "wx/gtk/assertdlg_gtk.h"
  41     #if wxUSE_STACKWALKER
  42         #include "wx/stackwalk.h"
  43     #endif // wxUSE_STACKWALKER
  44 #endif // wxDEBUG_LEVEL
  45
  46 #include <stdarg.h>
  47 #include <string.h>
  48 #include <sys/stat.h>
  49 #include <sys/types.h>
  50 #ifdef __UNIX__
  51 #include <unistd.h>
  52 #endif
  53
  54 #if wxUSE_DETECT_SM
  55     #include <X11/SM/SMlib.h>
  56
  57     #include "wx/unix/utilsx11.h"
  58 #endif
  59
  60 #include "wx/gtk/private/gtk2-compat.h"
  61
  62 //-----------------------------------------------------------------------------
  63 // data
  64 //-----------------------------------------------------------------------------
  65
  66 extern GtkWidget *wxGetRootWindow();
  67
  68 //----------------------------------------------------------------------------
  69 // misc.
  70 //----------------------------------------------------------------------------
  71
  72 void wxBell()
  73 {
  74     gdk_beep();
  75 }
  76
  77 // ----------------------------------------------------------------------------
  78 // display characteristics
  79 // ----------------------------------------------------------------------------
  80
  81 #ifdef GDK_WINDOWING_X11
  82 void *wxGetDisplay()
  83 {
  84     return GDK_DISPLAY_XDISPLAY(gtk_widget_get_display(wxGetRootWindow()));
  85 }
  86 #endif
  87
  88 void wxDisplaySize( int *width, int *height )
  89 {
  90     if (width) *width = gdk_screen_width();
  91     if (height) *height = gdk_screen_height();
  92 }
  93
  94 void wxDisplaySizeMM( int *width, int *height )
  95 {
  96     if (width) *width = gdk_screen_width_mm();
  97     if (height) *height = gdk_screen_height_mm();
  98 }
  99
 100 void wxGetMousePosition( int* x, int* y )
 101 {
 102     gdk_window_get_pointer(gtk_widget_get_root_window(wxGetRootWindow()), x, y, NULL);
 103 }
 104
 105 bool wxColourDisplay()
 106 {
 107     return true;
 108 }
 109
 110 int wxDisplayDepth()
 111 {
 112     return gdk_visual_get_depth(gtk_widget_get_visual(wxGetRootWindow()));
 113 }
 114
 115 wxWindow* wxFindWindowAtPoint(const wxPoint& pt)
 116 {
 117     return wxGenericFindWindowAtPoint(pt);
 118 }
 119
 120 #if !wxUSE_UNICODE
 121
 122 WXDLLIMPEXP_CORE wxCharBuffer
 123 wxConvertToGTK(const wxString& s, wxFontEncoding enc)
 124 {
 125     wxWCharBuffer wbuf;
 126     if ( enc == wxFONTENCODING_SYSTEM || enc == wxFONTENCODING_DEFAULT )
 127     {
 128         wbuf = wxConvUI->cMB2WC(s);
 129     }
 130     else // another encoding, use generic conversion class
 131     {
 132         wbuf = wxCSConv(enc).cMB2WC(s.c_str());
 133     }
 134
 135     if ( !wbuf && !s.empty() )
 136     {
 137         // conversion failed, but we still want to show something to the user
 138         // even if it's going to be wrong it is better than nothing
 139         //
 140         // we choose ISO8859-1 here arbitrarily, it's just the most common
 141         // encoding probably and, also importantly here, conversion from it
 142         // never fails as it's done internally by wxCSConv
 143         wbuf = wxCSConv(wxFONTENCODING_ISO8859_1).cMB2WC(s.c_str());
 144     }
 145
 146     return wxConvUTF8.cWC2MB(wbuf);
 147 }
 148
 149 WXDLLIMPEXP_CORE wxCharBuffer
 150 wxConvertFromGTK(const wxString& s, wxFontEncoding enc)
 151 {
 152     // this conversion should never fail as GTK+ always uses UTF-8 internally
 153     // so there are no complications here
 154     const wxWCharBuffer wbuf(wxConvUTF8.cMB2WC(s.c_str()));
 155     if ( enc == wxFONTENCODING_SYSTEM )
 156         return wxConvUI->cWC2MB(wbuf);
 157
 158     return wxCSConv(enc).cWC2MB(wbuf);
 159 }
 160
 161 #endif // !wxUSE_UNICODE
 162
 163 // Returns NULL if version is certainly greater or equal than major.minor.micro
 164 // Returns string describing the error if version is lower than
 165 // major.minor.micro OR it cannot be determined and one should not rely on the
 166 // availability of pango version major.minor.micro, nor the non-availability
 167 const gchar *wx_pango_version_check (int major, int minor, int micro)
 168 {
 169     // NOTE: you don't need to use this macro to check for Pango features
 170     //       added in pango-1.4 or earlier since GTK 2.4 (our minimum requirement
 171     //       for GTK lib) required pango 1.4...
 172
 173 #ifdef __WXGTK3__
 174     return pango_version_check(major, minor, micro);
 175 #elif defined(PANGO_VERSION_MAJOR)
 176     if (!gtk_check_version (2,11,0))
 177     {
 178         // GTK+ 2.11 requires Pango >= 1.15.3 and pango_version_check
 179         // was added in Pango 1.15.2 thus we know for sure the pango lib we're
 180         // using has the pango_version_check function:
 181         return pango_version_check (major, minor, micro);
 182     }
 183
 184     return "can't check";
 185 #else // !PANGO_VERSION_MAJOR
 186     wxUnusedVar(major);
 187     wxUnusedVar(minor);
 188     wxUnusedVar(micro);
 189
 190     return "too old headers";
 191 #endif
 192 }
 193
 194 // ----------------------------------------------------------------------------
 195 // subprocess routines
 196 // ----------------------------------------------------------------------------
 197
 198 #ifdef __UNIX__
 199
 200 extern "C" {
 201 static gboolean EndProcessDetector(GIOChannel* source, GIOCondition, void* data)
 202 {
 203     wxEndProcessData * const
 204         proc_data = static_cast<wxEndProcessData *>(data);
 205
 206     // child exited, end waiting
 207     close(g_io_channel_unix_get_fd(source));
 208
 209     wxHandleProcessTermination(proc_data);
 210
 211     // don't call us again!
 212     return false;
 213 }
 214 }
 215
 216 int wxGUIAppTraits::AddProcessCallback(wxEndProcessData *proc_data, int fd)
 217 {
 218     GIOChannel* channel = g_io_channel_unix_new(fd);
 219     GIOCondition cond = GIOCondition(G_IO_IN | G_IO_HUP | G_IO_ERR);
 220     unsigned id = g_io_add_watch(channel, cond, EndProcessDetector, proc_data);
 221     g_io_channel_unref(channel);
 222     return int(id);
 223 }
 224
 225 #endif // __UNIX__
 226
 227 // ----------------------------------------------------------------------------
 228 // wxPlatformInfo-related
 229 // ----------------------------------------------------------------------------
 230
 231 wxPortId wxGUIAppTraits::GetToolkitVersion(int *verMaj, int *verMin) const
 232 {
 233     if ( verMaj )
 234         *verMaj = gtk_major_version;
 235     if ( verMin )
 236         *verMin = gtk_minor_version;
 237
 238     return wxPORT_GTK;
 239 }
 240
 241 #if wxUSE_TIMER
 242
 243 wxTimerImpl *wxGUIAppTraits::CreateTimerImpl(wxTimer *timer)
 244 {
 245     return new wxGTKTimerImpl(timer);
 246 }
 247
 248 #endif // wxUSE_TIMER
 249
 250 #if wxUSE_DETECT_SM
 251 static wxString GetSM()
 252 {
 253     wxX11Display dpy;
 254     if ( !dpy )
 255         return wxEmptyString;
 256
 257     char smerr[256];
 258     char *client_id;
 259     SmcConn smc_conn = SmcOpenConnection(NULL, NULL,
 260                                          999, 999,
 261                                          0 /* mask */, NULL /* callbacks */,
 262                                          NULL, &client_id,
 263                                          WXSIZEOF(smerr), smerr);
 264
 265     if ( !smc_conn )
 266     {
 267         wxLogDebug("Failed to connect to session manager: %s", smerr);
 268         return wxEmptyString;
 269     }
 270
 271     char *vendor = SmcVendor(smc_conn);
 272     wxString ret = wxString::FromAscii( vendor );
 273     free(vendor);
 274
 275     SmcCloseConnection(smc_conn, 0, NULL);
 276     free(client_id);
 277
 278     return ret;
 279 }
 280 #endif // wxUSE_DETECT_SM
 281
 282
 283 //-----------------------------------------------------------------------------
 284 // wxGUIAppTraits
 285 //-----------------------------------------------------------------------------
 286
 287 wxEventLoopBase *wxGUIAppTraits::CreateEventLoop()
 288 {
 289     return new wxEventLoop();
 290 }
 291
 292
 293 #ifdef __UNIX__
 294
 295 #if wxDEBUG_LEVEL && wxUSE_STACKWALKER
 296
 297 // private helper class
 298 class StackDump : public wxStackWalker
 299 {
 300 public:
 301     StackDump(GtkAssertDialog *dlg) { m_dlg=dlg; }
 302
 303 protected:
 304     virtual void OnStackFrame(const wxStackFrame& frame)
 305     {
 306         wxString fncname = frame.GetName();
 307
 308         // append this stack frame's info in the dialog
 309         if (!frame.GetFileName().empty() || !fncname.empty())
 310         {
 311             gtk_assert_dialog_append_stack_frame(m_dlg,
 312                                                 fncname.utf8_str(),
 313                                                 frame.GetFileName().utf8_str(),
 314                                                 frame.GetLine());
 315         }
 316     }
 317
 318 private:
 319     GtkAssertDialog *m_dlg;
 320 };
 321
 322 static void get_stackframe_callback(void* p)
 323 {
 324     StackDump* dump = static_cast<StackDump*>(p);
 325     // skip over frames up to including wxOnAssert()
 326     dump->ProcessFrames(7);
 327 }
 328
 329 #endif // wxDEBUG_LEVEL && wxUSE_STACKWALKER
 330
 331 bool wxGUIAppTraits::ShowAssertDialog(const wxString& msg)
 332 {
 333 #if wxDEBUG_LEVEL
 334     // we can't show the dialog from another thread
 335     if ( wxIsMainThread() )
 336     {
 337         // under GTK2 we prefer to use a dialog widget written using directly
 338         // in GTK+ as use a dialog written using wxWidgets would need the
 339         // wxWidgets idle processing to work correctly which might not be the
 340         // case when assert happens
 341         GtkWidget *dialog = gtk_assert_dialog_new();
 342         gtk_assert_dialog_set_message(GTK_ASSERT_DIALOG(dialog), msg.mb_str());
 343
 344 #if wxUSE_STACKWALKER
 345         // save the current stack ow...
 346         StackDump dump(GTK_ASSERT_DIALOG(dialog));
 347         dump.SaveStack(100); // showing more than 100 frames is not very useful
 348
 349         // ...but process it only if the user needs it
 350         gtk_assert_dialog_set_backtrace_callback
 351         (
 352             GTK_ASSERT_DIALOG(dialog),
 353             get_stackframe_callback,
 354             &dump
 355         );
 356 #endif // wxUSE_STACKWALKER
 357
 358         gint result = gtk_dialog_run(GTK_DIALOG (dialog));
 359         bool returnCode = false;
 360         switch (result)
 361         {
 362             case GTK_ASSERT_DIALOG_STOP:
 363                 wxTrap();
 364                 break;
 365             case GTK_ASSERT_DIALOG_CONTINUE:
 366                 // nothing to do
 367                 break;
 368             case GTK_ASSERT_DIALOG_CONTINUE_SUPPRESSING:
 369                 // no more asserts
 370                 returnCode = true;
 371                 break;
 372
 373             default:
 374                 wxFAIL_MSG( wxT("unexpected return code from GtkAssertDialog") );
 375         }
 376
 377         gtk_widget_destroy(dialog);
 378         return returnCode;
 379     }
 380 #endif // wxDEBUG_LEVEL
 381
 382     return wxAppTraitsBase::ShowAssertDialog(msg);
 383 }
 384
 385 #endif // __UNIX__
 386
 387 #if defined(__UNIX__) || defined(__OS2__)
 388
 389 wxString wxGUIAppTraits::GetDesktopEnvironment() const
 390 {
 391     wxString de = wxSystemOptions::GetOption(wxT("gtk.desktop"));
 392 #if wxUSE_DETECT_SM
 393     if ( de.empty() )
 394     {
 395         static const wxString s_SM = GetSM();
 396
 397         if (s_SM == wxT("GnomeSM"))
 398             de = wxT("GNOME");
 399         else if (s_SM == wxT("KDE"))
 400             de = wxT("KDE");
 401     }
 402 #endif // wxUSE_DETECT_SM
 403
 404     return de;
 405 }
 406
 407 #endif // __UNIX__ || __OS2__
 408
 409 // see the hack below in wxCmdLineParser::GetUsageString().
 410 // TODO: replace this hack with a g_option_group_get_entries()
 411 //       call as soon as such function exists;
 412 //       see http://bugzilla.gnome.org/show_bug.cgi?id=431021 for the relative
 413 //       feature request
 414 struct _GOptionGroup
 415 {
 416   gchar           *name;
 417   gchar           *description;
 418   gchar           *help_description;
 419
 420   GDestroyNotify   destroy_notify;
 421   gpointer         user_data;
 422
 423   GTranslateFunc   translate_func;
 424   GDestroyNotify   translate_notify;
 425   gpointer     translate_data;
 426
 427   GOptionEntry    *entries;
 428   gint             n_entries;
 429
 430   GOptionParseFunc pre_parse_func;
 431   GOptionParseFunc post_parse_func;
 432   GOptionErrorFunc error_func;
 433 };
 434
 435 wxString wxGetNameFromGtkOptionEntry(const GOptionEntry *opt)
 436 {
 437     wxString ret;
 438
 439     if (opt->short_name)
 440         ret << wxT("-") << opt->short_name;
 441     if (opt->long_name)
 442     {
 443         if (!ret.empty())
 444             ret << wxT(", ");
 445         ret << wxT("--") << opt->long_name;
 446
 447         if (opt->arg_description)
 448             ret << wxT("=") << opt->arg_description;
 449     }
 450
 451     return wxT("  ") + ret;
 452 }
 453
 454 #ifdef __UNIX__
 455
 456 wxString
 457 wxGUIAppTraits::GetStandardCmdLineOptions(wxArrayString& names,
 458                                           wxArrayString& desc) const
 459 {
 460     wxString usage;
 461
 462     // check whether GLib version is greater than 2.6 but also lower than 2.33
 463     // because, as we use the undocumented _GOptionGroup struct, we don't want
 464     // to run this code with future versions which might change it (2.32 is the
 465     // latest one at the time of this writing)
 466     if (glib_check_version(2,33,0))
 467     {
 468         usage << _("The following standard GTK+ options are also supported:\n");
 469
 470         // passing true here means that the function can open the default
 471         // display while parsing (not really used here anyhow)
 472         GOptionGroup *gtkOpts = gtk_get_option_group(true);
 473
 474         // WARNING: here we access the internals of GOptionGroup:
 475         GOptionEntry *entries = ((_GOptionGroup*)gtkOpts)->entries;
 476         unsigned int n_entries = ((_GOptionGroup*)gtkOpts)->n_entries;
 477         wxArrayString namesOptions, descOptions;
 478
 479         for ( size_t n = 0; n < n_entries; n++ )
 480         {
 481             if ( entries[n].flags & G_OPTION_FLAG_HIDDEN )
 482                 continue;       // skip
 483
 484             names.push_back(wxGetNameFromGtkOptionEntry(&entries[n]));
 485
 486             const gchar * const entryDesc = entries[n].description;
 487             desc.push_back(wxString(entryDesc));
 488         }
 489
 490         g_option_group_free (gtkOpts);
 491     }
 492
 493     return usage;
 494 }
 495
 496 #endif // __UNIX__