Truncate ridiculously long titles to avoid crashing or letting the pager

2005-10-03  Elijah Newren  <newren@gmail.com>

	Truncate ridiculously long titles to avoid crashing or letting the
	pager crash.  Based on patch from Ray, incorporating suggestions
	from Havoc and some extensions of my own.  Fixes #315070.

	* src/display.c (set_utf8_string_hint, meta_display_open):
	* src/xprops.[ch] (meta_prop_set_utf8_string_hint):
	Move set_utf8_string_hint() to props.[ch], namespace it
	("meta_prop_"), and make it public

	* src/tabpopup.c (utf8_strndup, meta_ui_tab_popup_new):
	* src/util.[ch] (meta_g_utf8_strndup):
	Move utf8_strndup() to util.[ch], namespace it ("meta_g_"), and
	make it public

	* src/display.c (meta_display_open):
	* src/display.h (struct _MetaDisplay):
	add net_wm_visible_name and net_wm_visible_icon_name atoms to the
	list of atoms we work with

	* src/window-props.c (set_window_title, set_icon_title): If title
	length is greater than 512, truncate it and set
	_NET_WM_VISIBLE_NAME or _NET_WM_VISIBLE_ICON_NAME accordingly

ChangeLog

@@ -1,3 +1,28 @@
+2005-10-03  Elijah Newren  <newren@gmail.com>
+
+	Truncate ridiculously long titles to avoid crashing or letting the
+	pager crash.  Based on patch from Ray, incorporating suggestions
+	from Havoc and some extensions of my own.  Fixes #315070.
+
+	* src/display.c (set_utf8_string_hint, meta_display_open):
+	* src/xprops.[ch] (meta_prop_set_utf8_string_hint):
+	Move set_utf8_string_hint() to props.[ch], namespace it
+	("meta_prop_"), and make it public
+
+	* src/tabpopup.c (utf8_strndup, meta_ui_tab_popup_new):
+	* src/util.[ch] (meta_g_utf8_strndup):
+	Move utf8_strndup() to util.[ch], namespace it ("meta_g_"), and
+	make it public
+
+	* src/display.c (meta_display_open):
+	* src/display.h (struct _MetaDisplay):
+	add net_wm_visible_name and net_wm_visible_icon_name atoms to the
+	list of atoms we work with
+
+	* src/window-props.c (set_window_title, set_icon_title): If title
+	length is greater than 512, truncate it and set
+	_NET_WM_VISIBLE_NAME or _NET_WM_VISIBLE_ICON_NAME accordingly
+
 2005-10-03  Elijah Newren  <newren@gmail.com>
 
 	Get the tabbing window outline to work with gtk+ 2.8.4 again.

src/display.c

@@ -121,20 +121,6 @@ static void    prefs_changed_callback    (MetaPreference pref,
 static void    sanity_check_timestamps   (MetaDisplay *display,
                                           Time         known_good_timestamp);
 
-static void
-set_utf8_string_hint (MetaDisplay *display,
-                      Window xwindow,
-                      Atom atom,
-                      const char *val)
-{
-  meta_error_trap_push (display);
-  XChangeProperty (display->xdisplay, 
-                   xwindow, atom,
-                   display->atom_utf8_string, 
-                   8, PropModeReplace, (guchar*) val, strlen (val));
-  meta_error_trap_pop (display, FALSE);
-}
-
 static void
 ping_data_free (MetaPingData *ping_data)
 {
@@ -302,7 +288,9 @@ meta_display_open (const char *name)
     "_NET_MOVERESIZE_WINDOW",
     "_NET_DESKTOP_GEOMETRY",
     "_NET_DESKTOP_VIEWPORT",
-    "_METACITY_VERSION"
+    "_METACITY_VERSION",
+    "_NET_WM_VISIBLE_NAME",
+    "_NET_WM_VISIBLE_ICON_NAME"
   };
   Atom atoms[G_N_ELEMENTS(atom_names)];
   
@@ -460,6 +448,8 @@ meta_display_open (const char *name)
   display->atom_net_desktop_geometry = atoms[89];
   display->atom_net_desktop_viewport = atoms[90];
   display->atom_metacity_version = atoms[91];
+  display->atom_net_wm_visible_name = atoms[92];
+  display->atom_net_wm_visible_icon_name = atoms[93];
 
   display->prop_hooks = NULL;
   meta_display_init_window_prop_hooks (display);
@@ -637,12 +627,12 @@ meta_display_open (const char *name)
     display->leader_window = meta_create_offscreen_window (display->xdisplay,
                                                            DefaultRootWindow (display->xdisplay));                                                           
 
-    set_utf8_string_hint (display,
+    meta_prop_set_utf8_string_hint (display,
                                     display->leader_window,
                                     display->atom_net_wm_name,
                                     "Metacity");
     
-    set_utf8_string_hint (display,
+    meta_prop_set_utf8_string_hint (display,
                                     display->leader_window,
                                     display->atom_metacity_version,
                                     VERSION);

src/display.h

@@ -183,6 +183,8 @@ struct _MetaDisplay
   Atom atom_net_desktop_geometry;
   Atom atom_net_desktop_viewport;
   Atom atom_metacity_version;
+  Atom atom_net_wm_visible_name;
+  Atom atom_net_wm_visible_icon_name;
 
   /* This is the actual window from focus events,
    * not the one we last set

src/tabpopup.c

@@ -98,20 +98,6 @@ outline_window_expose (GtkWidget      *widget,
   return FALSE;
 }
 
-static char*
-utf8_strndup (const char *src,
-              int         n)
-{
-  const gchar *s = src;
-  while (n && *s)
-    {
-      s = g_utf8_next_char (s);
-      n--;
-    }
-
-  return g_strndup (src, s - src);
-}
-
 static GdkPixbuf*
 dimm_icon (GdkPixbuf *pixbuf)
 {
@@ -238,7 +224,7 @@ meta_ui_tab_popup_new (const MetaTabEntry *entries,
               tmp = markup;
             }
             
-          te->title = utf8_strndup (tmp, max_chars_per_title);
+          te->title = meta_g_utf8_strndup (tmp, max_chars_per_title);
           g_free (tmp);
         }
       te->widget = NULL;

src/util.c

@@ -161,6 +161,20 @@ meta_set_replace_current_wm (gboolean setting)
   replace_current = setting;
 }
 
+char *
+meta_g_utf8_strndup (const gchar *src,
+                     gsize        n)
+{
+  const gchar *s = src;
+  while (n && *s)
+    {
+      s = g_utf8_next_char (s);
+      n--;
+    }
+
+  return g_strndup (src, s - src);
+}
+
 static int
 utf8_fputs (const char *str,
             FILE       *f)

src/util.h

@@ -88,6 +88,7 @@ void meta_print_backtrace (void);
 #define _(x) dgettext (GETTEXT_PACKAGE, x)
 #define N_(x) x
 
+char* meta_g_utf8_strndup (const gchar *src, gsize n);
 
 /* To disable verbose mode, we make these functions into no-ops */
 #ifdef WITH_VERBOSE_MODE

src/window-props.c

@@ -190,6 +190,8 @@ reload_net_wm_user_time (MetaWindow    *window,
     }
 }
 
+#define MAX_TITLE_LENGTH 512
+
 static void
 set_window_title (MetaWindow *window,
                   const char *title)
@@ -200,8 +202,16 @@ set_window_title (MetaWindow *window,
   
   if (title == NULL)
     window->title = g_strdup ("");
-  else
+  else if (g_utf8_strlen (title, MAX_TITLE_LENGTH + 1) <= MAX_TITLE_LENGTH)
     window->title = g_strdup (title);
+  else
+    {
+      window->title = meta_g_utf8_strndup (title, MAX_TITLE_LENGTH);
+      meta_prop_set_utf8_string_hint (window->display,
+                                      window->xwindow,
+                                      window->display->atom_net_wm_visible_name,
+                                      window->title);
+    }
   
   /* strndup is a hack since GNU libc has broken %.10s */
   str = g_strndup (window->title, 10);
@@ -285,8 +295,17 @@ set_icon_title (MetaWindow *window,
   
   if (title == NULL)
     window->icon_name = g_strdup ("");
-  else
+  else if (g_utf8_strlen (title, MAX_TITLE_LENGTH + 1) <= MAX_TITLE_LENGTH)
     window->icon_name = g_strdup (title);
+  else
+    {
+      window->icon_name = meta_g_utf8_strndup (title, MAX_TITLE_LENGTH);
+      meta_prop_set_utf8_string_hint (window->display,
+                                      window->xwindow,
+                                      window->display->atom_net_wm_visible_icon_name,
+                                      window->icon_name);
+    }
+
 }
 
 static void

src/xprops.c

@@ -524,6 +524,20 @@ meta_prop_get_utf8_list (MetaDisplay   *display,
   return utf8_list_from_results (&results, str_p, n_str_p);
 }
 
+void
+meta_prop_set_utf8_string_hint (MetaDisplay *display,
+                                Window xwindow,
+                                Atom atom,
+                                const char *val)
+{
+  meta_error_trap_push (display);
+  XChangeProperty (display->xdisplay, 
+                   xwindow, atom,
+                   display->atom_utf8_string, 
+                   8, PropModeReplace, (guchar*) val, strlen (val));
+  meta_error_trap_pop (display, FALSE);
+}
+
 static gboolean
 window_from_results (GetPropertyResults *results,
                      Window             *window_p)

src/xprops.h

@@ -95,6 +95,11 @@ gboolean meta_prop_get_utf8_list     (MetaDisplay   *display,
                                       Atom           xatom,
                                       char        ***str_p,
                                       int           *n_str_p);
+void     meta_prop_set_utf8_string_hint
+                                     (MetaDisplay *display,
+                                      Window xwindow,
+                                      Atom atom,
+                                      const char *val);
 gboolean meta_prop_get_window        (MetaDisplay   *display,
                                       Window         xwindow,
                                       Atom           xatom,