polkitAgent: Indicate which application initiated a request

Now that the ::initiate signal may contain the PID of the initiating
process, we can try to resolve it to an application and use that to
indicate where a request originated. This should work for well-behaved
applications that only ask for permissions in response to a user action,
but unfortunately not when it would be most useful, that is when the
dialog is triggered "out of nowhere" by a background service ...

https://bugzilla.gnome.org/show_bug.cgi?id=688351

data/theme/gnome-shell-sass/_common.scss

@@ -374,6 +374,7 @@ StScrollBar {
   border: 3px solid $_bubble_borders_color;
 
   .message-dialog-main-layout { spacing: 24px; padding: 10px; }
+  .message-dialog-icon { -st-icon-style: symbolic; }
   .message-dialog-content { spacing: 16px; }
   .message-dialog-title { color: darken($osd_fg_color,25%); }
 }

js/ui/components/polkitAgent.js

@@ -32,7 +32,7 @@ var AuthenticationDialog = new Lang.Class({
     Name: 'AuthenticationDialog',
     Extends: ModalDialog.ModalDialog,
 
-    _init(actionId, body, cookie, userNames) {
+    _init(actionId, body, cookie, app, userNames) {
         this.parent({ styleClass: 'prompt-dialog' });
 
         this.actionId = actionId;
@@ -44,8 +44,11 @@ var AuthenticationDialog = new Lang.Class({
             this._group.visible = !Main.sessionMode.isLocked;
         });
 
-        let icon = new Gio.ThemedIcon({ name: 'dialog-password-symbolic' });
-        let title = _("Authentication Required");
+        let appInfo = app ? app.app_info : null;
+        let icon = appInfo ? appInfo.get_icon()
+                           : new Gio.ThemedIcon({ name: 'dialog-password' });
+        let title = appInfo ? _("%s Requires Authentication").format(appInfo.get_name())
+                            : _("Authentication Required");
 
         let content = new Dialog.MessageDialogContent({ icon, title, body });
         this.contentLayout.add_actor(content);
@@ -362,6 +365,8 @@ var AuthenticationAgent = new Lang.Class({
         this._native.connect('initiate', this._onInitiate.bind(this));
         this._native.connect('cancel', this._onCancel.bind(this));
         this._sessionUpdatedId = 0;
+
+        this._windowTracker = Shell.WindowTracker.get_default();
     },
 
     enable() {
@@ -380,7 +385,7 @@ var AuthenticationAgent = new Lang.Class({
         }
     },
 
-    _onInitiate(nativeAgent, actionId, message, iconName, cookie, userNames) {
+    _onInitiate(nativeAgent, actionId, message, iconName, cookie, subjectPid, userNames) {
         // Don't pop up a dialog while locked
         if (Main.sessionMode.isLocked) {
             this._sessionUpdatedId = Main.sessionMode.connect('updated', () => {
@@ -392,7 +397,10 @@ var AuthenticationAgent = new Lang.Class({
             return;
         }
 
-        this._currentDialog = new AuthenticationDialog(actionId, message, cookie, userNames);
+        let pid = parseInt(subjectPid);
+        let app = pid != NaN ? this._windowTracker.get_app_from_pid(pid) : null;
+
+        this._currentDialog = new AuthenticationDialog(actionId, message, cookie, app, userNames);
 
         // We actually don't want to open the dialog until we know for
         // sure that we're going to interact with the user. For

src/shell-polkit-authentication-agent.c

@@ -162,7 +162,8 @@ shell_polkit_authentication_agent_class_init (ShellPolkitAuthenticationAgentClas
                   NULL, /* accumulator data */
                   NULL, /* marshaller */
                   G_TYPE_NONE,
-                  5,
+                  6,
+                  G_TYPE_STRING,
                   G_TYPE_STRING,
                   G_TYPE_STRING,
                   G_TYPE_STRING,
@@ -267,6 +268,7 @@ auth_request_initiate (AuthRequest *request)
                  request->message,
                  request->icon_name,
                  request->cookie,
+                 polkit_details_lookup (request->details, "polkit.subject-pid"),
                  user_names);
   g_strfreev (user_names);
 }