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
  23 #include "wx/process.h"
  24
  25 #include "wx/unix/execute.h"
  26
  27 #ifdef __WXDEBUG__
  28     #include "wx/gtk/assertdlg_gtk.h"
  29     #if wxUSE_STACKWALKER
  30         #include "wx/stackwalk.h"
  31     #endif // wxUSE_STACKWALKER
  32 #endif // __WXDEBUG__
  33
  34 #include <stdarg.h>
  35 #include <string.h>
  36 #include <sys/stat.h>
  37 #include <sys/types.h>
  38 #include <sys/wait.h>   // for WNOHANG
  39 #include <unistd.h>
  40
  41 #include "glib.h"
  42 #include "gdk/gdk.h"
  43 #include "gtk/gtk.h"
  44 #include "gdk/gdkx.h"
  45
  46 #ifdef HAVE_X11_XKBLIB_H
  47     /* under HP-UX and Solaris 2.6, at least, XKBlib.h defines structures with
  48      * field named "explicit" - which is, of course, an error for a C++
  49      * compiler. To be on the safe side, just redefine it everywhere. */
  50     #define explicit __wx_explicit
  51
  52     #include "X11/XKBlib.h"
  53
  54     #undef explicit
  55 #endif // HAVE_X11_XKBLIB_H
  56
  57
  58 #if wxUSE_DETECT_SM
  59     #include "X11/Xlib.h"
  60     #include "X11/SM/SMlib.h"
  61 #endif
  62
  63 //-----------------------------------------------------------------------------
  64 // data
  65 //-----------------------------------------------------------------------------
  66
  67 extern GtkWidget *wxGetRootWindow();
  68
  69 //----------------------------------------------------------------------------
  70 // misc.
  71 //----------------------------------------------------------------------------
  72 #ifndef __EMX__
  73 // on OS/2, we use the wxBell from wxBase library
  74
  75 void wxBell()
  76 {
  77     gdk_beep();
  78 }
  79 #endif
  80
  81 /* Don't synthesize KeyUp events holding down a key and producing
  82    KeyDown events with autorepeat. */
  83 #ifdef HAVE_X11_XKBLIB_H
  84 bool wxSetDetectableAutoRepeat( bool flag )
  85 {
  86     Bool result;
  87     XkbSetDetectableAutoRepeat( GDK_DISPLAY(), flag, &result );
  88     return result;       /* true if keyboard hardware supports this mode */
  89 }
  90 #else
  91 bool wxSetDetectableAutoRepeat( bool WXUNUSED(flag) )
  92 {
  93     return false;
  94 }
  95 #endif
  96
  97 // Escapes string so that it is valid Pango markup XML string:
  98 wxString wxEscapeStringForPangoMarkup(const wxString& str)
  99 {
 100     size_t len = str.length();
 101     wxString out;
 102     out.Alloc(len);
 103     for (size_t i = 0; i < len; i++)
 104     {
 105         wxChar c = str[i];
 106         switch (c)
 107         {
 108             case _T('&'):
 109                 out << _T("&amp;");
 110                 break;
 111             case _T('<'):
 112                 out << _T("&lt;");
 113                 break;
 114             case _T('>'):
 115                 out << _T("&gt;");
 116                 break;
 117             case _T('\''):
 118                 out << _T("&apos;");
 119                 break;
 120             case _T('"'):
 121                 out << _T("&quot;");
 122                 break;
 123             default:
 124                 out << c;
 125                 break;
 126         }
 127     }
 128     return out;
 129 }
 130
 131
 132 // ----------------------------------------------------------------------------
 133 // display characterstics
 134 // ----------------------------------------------------------------------------
 135
 136 void *wxGetDisplay()
 137 {
 138     return GDK_DISPLAY();
 139 }
 140
 141 void wxDisplaySize( int *width, int *height )
 142 {
 143     if (width) *width = gdk_screen_width();
 144     if (height) *height = gdk_screen_height();
 145 }
 146
 147 void wxDisplaySizeMM( int *width, int *height )
 148 {
 149     if (width) *width = gdk_screen_width_mm();
 150     if (height) *height = gdk_screen_height_mm();
 151 }
 152
 153 void wxClientDisplayRect(int *x, int *y, int *width, int *height)
 154 {
 155     // This is supposed to return desktop dimensions minus any window
 156     // manager panels, menus, taskbars, etc.  If there is a way to do that
 157     // for this platform please fix this function, otherwise it defaults
 158     // to the entire desktop.
 159     if (x) *x = 0;
 160     if (y) *y = 0;
 161     wxDisplaySize(width, height);
 162 }
 163
 164 void wxGetMousePosition( int* x, int* y )
 165 {
 166     gdk_window_get_pointer( (GdkWindow*) NULL, x, y, (GdkModifierType*) NULL );
 167 }
 168
 169 bool wxColourDisplay()
 170 {
 171     return true;
 172 }
 173
 174 int wxDisplayDepth()
 175 {
 176     return gdk_drawable_get_visual( wxGetRootWindow()->window )->depth;
 177 }
 178
 179 wxWindow* wxFindWindowAtPoint(const wxPoint& pt)
 180 {
 181     return wxGenericFindWindowAtPoint(pt);
 182 }
 183
 184 #if !wxUSE_UNICODE
 185
 186 wxCharBuffer wxConvertToGTK(const wxString& s, wxFontEncoding enc)
 187 {
 188     wxWCharBuffer wbuf;
 189     if ( enc == wxFONTENCODING_SYSTEM || enc == wxFONTENCODING_DEFAULT )
 190     {
 191         wbuf = wxConvUI->cMB2WC(s);
 192     }
 193     else // another encoding, use generic conversion class
 194     {
 195         wbuf = wxCSConv(enc).cMB2WC(s);
 196     }
 197
 198     if ( !wbuf && !s.empty() )
 199     {
 200         // conversion failed, but we still want to show something to the user
 201         // even if it's going to be wrong it is better than nothing
 202         //
 203         // we choose ISO8859-1 here arbitrarily, it's just the most common
 204         // encoding probably and, also importantly here, conversion from it
 205         // never fails as it's done internally by wxCSConv
 206         wbuf = wxCSConv(wxFONTENCODING_ISO8859_1).cMB2WC(s);
 207     }
 208
 209     return wxConvUTF8.cWC2MB(wbuf);
 210 }
 211
 212 #endif // !wxUSE_UNICODE
 213
 214 // ----------------------------------------------------------------------------
 215 // subprocess routines
 216 // ----------------------------------------------------------------------------
 217
 218 extern "C" {
 219 static
 220 void GTK_EndProcessDetector(gpointer data, gint source,
 221                             GdkInputCondition WXUNUSED(condition) )
 222 {
 223    wxEndProcessData *proc_data = (wxEndProcessData *)data;
 224
 225    // has the process really terminated? unfortunately GDK (or GLib) seem to
 226    // generate G_IO_HUP notification even when it simply tries to read from a
 227    // closed fd and hasn't terminated at all
 228    int pid = (proc_data->pid > 0) ? proc_data->pid : -(proc_data->pid);
 229    int status = 0;
 230    int rc = waitpid(pid, &status, WNOHANG);
 231
 232    if ( rc == 0 )
 233    {
 234        // no, it didn't exit yet, continue waiting
 235        return;
 236    }
 237
 238    // set exit code to -1 if something bad happened
 239    proc_data->exitcode = rc != -1 && WIFEXITED(status) ? WEXITSTATUS(status)
 240                                                       : -1;
 241
 242    // child exited, end waiting
 243    close(source);
 244
 245    // don't call us again!
 246    gdk_input_remove(proc_data->tag);
 247
 248    wxHandleProcessTermination(proc_data);
 249 }
 250 }
 251
 252 int wxAddProcessCallback(wxEndProcessData *proc_data, int fd)
 253 {
 254     int tag = gdk_input_add(fd,
 255                             GDK_INPUT_READ,
 256                             GTK_EndProcessDetector,
 257                             (gpointer)proc_data);
 258
 259     return tag;
 260 }
 261
 262
 263
 264 // ----------------------------------------------------------------------------
 265 // wxPlatformInfo-related
 266 // ----------------------------------------------------------------------------
 267
 268 wxPortId wxGUIAppTraits::GetToolkitVersion(int *verMaj, int *verMin) const
 269 {
 270     if ( verMaj )
 271         *verMaj = gtk_major_version;
 272     if ( verMin )
 273         *verMin = gtk_minor_version;
 274
 275     return wxPORT_GTK;
 276 }
 277
 278 #if wxUSE_DETECT_SM
 279 static wxString GetSM()
 280 {
 281     class Dpy
 282     {
 283     public:
 284         Dpy() { m_dpy = XOpenDisplay(NULL); }
 285         ~Dpy() { if ( m_dpy ) XCloseDisplay(m_dpy); }
 286
 287         operator Display *() const { return m_dpy; }
 288     private:
 289         Display *m_dpy;
 290     } dpy;
 291
 292     if ( !dpy )
 293         return wxEmptyString;
 294
 295     char *client_id;
 296     SmcConn smc_conn = SmcOpenConnection(NULL, NULL,
 297                                          999, 999,
 298                                          0 /* mask */, NULL /* callbacks */,
 299                                          NULL, &client_id,
 300                                          0, NULL);
 301
 302     if ( !smc_conn )
 303         return wxEmptyString;
 304
 305     char *vendor = SmcVendor(smc_conn);
 306     wxString ret = wxString::FromAscii( vendor );
 307     free(vendor);
 308
 309     SmcCloseConnection(smc_conn, 0, NULL);
 310     free(client_id);
 311
 312     return ret;
 313 }
 314 #endif // wxUSE_DETECT_SM
 315
 316
 317 //-----------------------------------------------------------------------------
 318 // wxGUIAppTraits
 319 //-----------------------------------------------------------------------------
 320
 321 #ifdef __WXDEBUG__
 322
 323 #if wxUSE_STACKWALKER
 324
 325 // private helper class
 326 class StackDump : public wxStackWalker
 327 {
 328 public:
 329     StackDump(GtkAssertDialog *dlg) { m_dlg=dlg; }
 330
 331 protected:
 332     virtual void OnStackFrame(const wxStackFrame& frame)
 333     {
 334         wxString fncname = frame.GetName();
 335         wxString fncargs = fncname;
 336
 337         size_t n = fncname.find(wxT('('));
 338         if (n != wxString::npos)
 339         {
 340             // remove arguments from function name
 341             fncname.erase(n);
 342
 343             // remove function name and brackets from arguments
 344             fncargs = fncargs.substr(n+1, fncargs.length()-n-2);
 345         }
 346         else
 347             fncargs = wxEmptyString;
 348
 349         // append this stack frame's info in the dialog
 350         if (!frame.GetFileName().empty() || !fncname.empty())
 351             gtk_assert_dialog_append_stack_frame(m_dlg,
 352                                                 fncname.mb_str(),
 353                                                 fncargs.mb_str(),
 354                                                 frame.GetFileName().mb_str(),
 355                                                 frame.GetLine());
 356     }
 357
 358 private:
 359     GtkAssertDialog *m_dlg;
 360 };
 361
 362 // the callback functions must be extern "C" to comply with GTK+ declarations
 363 extern "C"
 364 {
 365     void get_stackframe_callback(StackDump *dump)
 366     {
 367         // skip over frames up to including wxOnAssert()
 368         dump->ProcessFrames(3);
 369     }
 370 }
 371
 372 #endif      // wxUSE_STACKWALKER
 373
 374 bool wxGUIAppTraits::ShowAssertDialog(const wxString& msg)
 375 {
 376     // under GTK2 we prefer to use a dialog widget written using directly GTK+;
 377     // in fact we cannot use a dialog written using wxWidgets: it would need
 378     // the wxWidgets idle processing to work correctly!
 379     GtkWidget *dialog = gtk_assert_dialog_new();
 380     gtk_assert_dialog_set_message(GTK_ASSERT_DIALOG(dialog), msg.mb_str());
 381
 382 #if wxUSE_STACKWALKER
 383     // don't show more than maxLines or we could get a dialog too tall to be
 384     // shown on screen: 20 should be ok everywhere as even with 15 pixel high
 385     // characters it is still only 300 pixels...
 386     static const int maxLines = 20;
 387
 388     // save current stack frame...
 389     StackDump dump(GTK_ASSERT_DIALOG(dialog));
 390     dump.SaveStack(maxLines);
 391
 392     // ...but process it only if the user needs it
 393     gtk_assert_dialog_set_backtrace_callback(GTK_ASSERT_DIALOG(dialog),
 394                                              (GtkAssertDialogStackFrameCallback)get_stackframe_callback,
 395                                              &dump);
 396 #endif      // wxUSE_STACKWALKER
 397
 398     gint result = gtk_dialog_run(GTK_DIALOG (dialog));
 399     bool returnCode = false;
 400     switch (result)
 401     {
 402     case GTK_ASSERT_DIALOG_STOP:
 403         wxTrap();
 404         break;
 405     case GTK_ASSERT_DIALOG_CONTINUE:
 406         // nothing to do
 407         break;
 408     case GTK_ASSERT_DIALOG_CONTINUE_SUPPRESSING:
 409         // no more asserts
 410         returnCode = true;
 411         break;
 412
 413     default:
 414         wxFAIL_MSG( _T("unexpected return code from GtkAssertDialog") );
 415     }
 416
 417     gtk_widget_destroy(dialog);
 418     return returnCode;
 419 }
 420
 421 #endif  // __WXDEBUG__
 422
 423 wxString wxGUIAppTraits::GetDesktopEnvironment() const
 424 {
 425 #if wxUSE_DETECT_SM
 426     const wxString SM = GetSM();
 427
 428     if (SM == wxT("GnomeSM"))
 429         return wxT("GNOME");
 430
 431     if (SM == wxT("KDE"))
 432         return wxT("KDE");
 433 #endif // wxUSE_DETECT_SM
 434
 435     return wxEmptyString;
 436 }
 437
 438
 439