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 wxCharBuffer wxConvertFromGTK(const wxString& s, wxFontEncoding enc)
 213 {
 214     // this conversion should never fail as GTK+ always uses UTF-8 internally
 215     // so there are no complications here
 216     const wxWCharBuffer wbuf(wxConvUTF8.cMB2WC(s));
 217     if ( enc == wxFONTENCODING_SYSTEM )
 218         return wxConvUI->cWC2MB(wbuf);
 219
 220     return wxCSConv(enc).cWC2MB(wbuf);
 221 }
 222
 223 #endif // !wxUSE_UNICODE
 224
 225 // ----------------------------------------------------------------------------
 226 // subprocess routines
 227 // ----------------------------------------------------------------------------
 228
 229 extern "C" {
 230 static
 231 void GTK_EndProcessDetector(gpointer data, gint source,
 232                             GdkInputCondition WXUNUSED(condition) )
 233 {
 234    wxEndProcessData *proc_data = (wxEndProcessData *)data;
 235
 236    // has the process really terminated? unfortunately GDK (or GLib) seem to
 237    // generate G_IO_HUP notification even when it simply tries to read from a
 238    // closed fd and hasn't terminated at all
 239    int pid = (proc_data->pid > 0) ? proc_data->pid : -(proc_data->pid);
 240    int status = 0;
 241    int rc = waitpid(pid, &status, WNOHANG);
 242
 243    if ( rc == 0 )
 244    {
 245        // no, it didn't exit yet, continue waiting
 246        return;
 247    }
 248
 249    // set exit code to -1 if something bad happened
 250    proc_data->exitcode = rc != -1 && WIFEXITED(status) ? WEXITSTATUS(status)
 251                                                       : -1;
 252
 253    // child exited, end waiting
 254    close(source);
 255
 256    // don't call us again!
 257    gdk_input_remove(proc_data->tag);
 258
 259    wxHandleProcessTermination(proc_data);
 260 }
 261 }
 262
 263 int wxAddProcessCallback(wxEndProcessData *proc_data, int fd)
 264 {
 265     int tag = gdk_input_add(fd,
 266                             GDK_INPUT_READ,
 267                             GTK_EndProcessDetector,
 268                             (gpointer)proc_data);
 269
 270     return tag;
 271 }
 272
 273
 274
 275 // ----------------------------------------------------------------------------
 276 // wxPlatformInfo-related
 277 // ----------------------------------------------------------------------------
 278
 279 wxPortId wxGUIAppTraits::GetToolkitVersion(int *verMaj, int *verMin) const
 280 {
 281     if ( verMaj )
 282         *verMaj = gtk_major_version;
 283     if ( verMin )
 284         *verMin = gtk_minor_version;
 285
 286     return wxPORT_GTK;
 287 }
 288
 289 #if wxUSE_DETECT_SM
 290 static wxString GetSM()
 291 {
 292     class Dpy
 293     {
 294     public:
 295         Dpy() { m_dpy = XOpenDisplay(NULL); }
 296         ~Dpy() { if ( m_dpy ) XCloseDisplay(m_dpy); }
 297
 298         operator Display *() const { return m_dpy; }
 299     private:
 300         Display *m_dpy;
 301     } dpy;
 302
 303     if ( !dpy )
 304         return wxEmptyString;
 305
 306     char *client_id;
 307     SmcConn smc_conn = SmcOpenConnection(NULL, NULL,
 308                                          999, 999,
 309                                          0 /* mask */, NULL /* callbacks */,
 310                                          NULL, &client_id,
 311                                          0, NULL);
 312
 313     if ( !smc_conn )
 314         return wxEmptyString;
 315
 316     char *vendor = SmcVendor(smc_conn);
 317     wxString ret = wxString::FromAscii( vendor );
 318     free(vendor);
 319
 320     SmcCloseConnection(smc_conn, 0, NULL);
 321     free(client_id);
 322
 323     return ret;
 324 }
 325 #endif // wxUSE_DETECT_SM
 326
 327
 328 //-----------------------------------------------------------------------------
 329 // wxGUIAppTraits
 330 //-----------------------------------------------------------------------------
 331
 332 #ifdef __WXDEBUG__
 333
 334 #if wxUSE_STACKWALKER
 335
 336 // private helper class
 337 class StackDump : public wxStackWalker
 338 {
 339 public:
 340     StackDump(GtkAssertDialog *dlg) { m_dlg=dlg; }
 341
 342 protected:
 343     virtual void OnStackFrame(const wxStackFrame& frame)
 344     {
 345         wxString fncname = frame.GetName();
 346         wxString fncargs = fncname;
 347
 348         size_t n = fncname.find(wxT('('));
 349         if (n != wxString::npos)
 350         {
 351             // remove arguments from function name
 352             fncname.erase(n);
 353
 354             // remove function name and brackets from arguments
 355             fncargs = fncargs.substr(n+1, fncargs.length()-n-2);
 356         }
 357         else
 358             fncargs = wxEmptyString;
 359
 360         // append this stack frame's info in the dialog
 361         if (!frame.GetFileName().empty() || !fncname.empty())
 362             gtk_assert_dialog_append_stack_frame(m_dlg,
 363                                                 fncname.mb_str(),
 364                                                 fncargs.mb_str(),
 365                                                 frame.GetFileName().mb_str(),
 366                                                 frame.GetLine());
 367     }
 368
 369 private:
 370     GtkAssertDialog *m_dlg;
 371 };
 372
 373 // the callback functions must be extern "C" to comply with GTK+ declarations
 374 extern "C"
 375 {
 376     void get_stackframe_callback(StackDump *dump)
 377     {
 378         // skip over frames up to including wxOnAssert()
 379         dump->ProcessFrames(3);
 380     }
 381 }
 382
 383 #endif      // wxUSE_STACKWALKER
 384
 385 bool wxGUIAppTraits::ShowAssertDialog(const wxString& msg)
 386 {
 387     // under GTK2 we prefer to use a dialog widget written using directly GTK+;
 388     // in fact we cannot use a dialog written using wxWidgets: it would need
 389     // the wxWidgets idle processing to work correctly!
 390     GtkWidget *dialog = gtk_assert_dialog_new();
 391     gtk_assert_dialog_set_message(GTK_ASSERT_DIALOG(dialog), msg.mb_str());
 392
 393 #if wxUSE_STACKWALKER
 394     // don't show more than maxLines or we could get a dialog too tall to be
 395     // shown on screen: 20 should be ok everywhere as even with 15 pixel high
 396     // characters it is still only 300 pixels...
 397     static const int maxLines = 20;
 398
 399     // save current stack frame...
 400     StackDump dump(GTK_ASSERT_DIALOG(dialog));
 401     dump.SaveStack(maxLines);
 402
 403     // ...but process it only if the user needs it
 404     gtk_assert_dialog_set_backtrace_callback(GTK_ASSERT_DIALOG(dialog),
 405                                              (GtkAssertDialogStackFrameCallback)get_stackframe_callback,
 406                                              &dump);
 407 #endif      // wxUSE_STACKWALKER
 408
 409     gint result = gtk_dialog_run(GTK_DIALOG (dialog));
 410     bool returnCode = false;
 411     switch (result)
 412     {
 413     case GTK_ASSERT_DIALOG_STOP:
 414         wxTrap();
 415         break;
 416     case GTK_ASSERT_DIALOG_CONTINUE:
 417         // nothing to do
 418         break;
 419     case GTK_ASSERT_DIALOG_CONTINUE_SUPPRESSING:
 420         // no more asserts
 421         returnCode = true;
 422         break;
 423
 424     default:
 425         wxFAIL_MSG( _T("unexpected return code from GtkAssertDialog") );
 426     }
 427
 428     gtk_widget_destroy(dialog);
 429     return returnCode;
 430 }
 431
 432 #endif  // __WXDEBUG__
 433
 434 wxString wxGUIAppTraits::GetDesktopEnvironment() const
 435 {
 436 #if wxUSE_DETECT_SM
 437     const wxString SM = GetSM();
 438
 439     if (SM == wxT("GnomeSM"))
 440         return wxT("GNOME");
 441
 442     if (SM == wxT("KDE"))
 443         return wxT("KDE");
 444 #endif // wxUSE_DETECT_SM
 445
 446     return wxEmptyString;
 447 }
 448
 449
 450