[gnome-shell/wip/fmuellner/notification-redux+sass: 121/141] dateMenu: Show indicator for messages that skipped banner mode

[Florian Müllner <fmuellner src gnome org>]

commit 0458173c3773fc6ce875c000a0e8df1550e2b064
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Feb 14 03:17:16 2015 +0100

    dateMenu: Show indicator for messages that skipped banner mode
    
    The summary may contain notifications that have not been seen by the user
    and won't be shown as banner. Currently this is only the case for resident
    notifications that are emitted by the focused app, but it will become more
    common as we will start limiting the number of queued notifications.
    Indicate to the user that more notifications are available by displaying a
    small dot in the top bar button.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=744850

 js/ui/dateMenu.js    |   73 +++++++++++++++++++++++++++++++++++++++++++++++++-
 js/ui/messageTray.js |    4 +++
 2 files changed, 76 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/dateMenu.js b/js/ui/dateMenu.js
index 4e88411..7e2cb5c 100644
--- a/js/ui/dateMenu.js
+++ b/js/ui/dateMenu.js
@@ -220,6 +220,69 @@ const WorldClocksSection = new Lang.Class({
     }
 });
 
+const MessagesIndicator = new Lang.Class({
+    Name: 'MessagesIndicator',
+
+    _init: function() {
+        this.actor = new St.Label({ text: '⚫', visible: false, y_expand: true,
+                                    y_align: Clutter.ActorAlign.CENTER });
+
+        this._sources = [];
+
+        Main.messageTray.connect('source-added', Lang.bind(this, this._onSourceAdded));
+        Main.messageTray.connect('source-removed', Lang.bind(this, this._onSourceRemoved));
+
+        let sources = Main.messageTray.getSources();
+        sources.forEach(Lang.bind(this, function(source) { this._onSourceAdded(null, source); }));
+    },
+
+    _onSourceAdded: function(tray, source) {
+        source.connect('count-updated', Lang.bind(this, this._updateCount));
+        this._sources.push(source);
+        this._updateCount();
+    },
+
+    _onSourceRemoved: function(tray, source) {
+        this._sources.splice(this._sources.indexOf(source), 1);
+        this._updateCount();
+    },
+
+    _updateCount: function() {
+        let count = 0;
+        this._sources.forEach(Lang.bind(this,
+            function(source) {
+                count += source.unseenCount;
+            }));
+        count -= Main.messageTray.queueCount;
+
+        this.actor.visible = (count > 0);
+    }
+});
+
+const IndicatorPad = new Lang.Class({
+    Name: 'IndicatorPad',
+    Extends: St.Widget,
+
+    _init: function(actor) {
+        this._source = actor;
+        this._source.connect('notify::visible',
+                             Lang.bind(this, this.queue_relayout));
+        this.parent();
+    },
+
+    vfunc_get_preferred_width: function(container, forHeight) {
+        if (this._source.visible)
+            return this._source.get_preferred_width(forHeight);
+        return [0, 0];
+    },
+
+    vfunc_get_preferred_height: function(container, forWidth) {
+        if (this._source.visible)
+            return this._source.get_preferred_height(forWidth);
+        return [0, 0];
+    }
+});
+
 const FreezableBinLayout = new Lang.Class({
     Name: 'FreezableBinLayout',
     Extends: Clutter.BinLayout,
@@ -269,10 +332,18 @@ const DateMenuButton = new Lang.Class({
         this.parent(menuAlignment);
 
         this._clockDisplay = new St.Label({ y_align: Clutter.ActorAlign.CENTER });
+        this._indicator = new MessagesIndicator();
+
+        let box = new St.BoxLayout();
+        box.add_actor(new IndicatorPad(this._indicator.actor));
+        box.add_actor(this._clockDisplay);
+        box.add_actor(this._indicator.actor);
+
         this.actor.label_actor = this._clockDisplay;
-        this.actor.add_actor(this._clockDisplay);
+        this.actor.add_actor(box);
         this.actor.add_style_class_name ('clock-display');
 
+
         let layout = new FreezableBinLayout();
         let bin = new St.Widget({ layout_manager: layout });
         this.menu.box.add_child(bin);
diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index 7d22a42..eea354c 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -1456,6 +1456,10 @@ const MessageTray = new Lang.Class({
         }
     },
 
+    get queueCount() {
+        return this._notificationQueue.length;
+    },
+
     contains: function(source) {
         return this._sources.has(source);
     },