[gnome-shell] popup-menu: Add 'sensitive' flag to item parameters

[Florian MÃllner <fmuellner src gnome org>]

commit 824220356f273a5cc5b7f82968203a15cde517e0
Author: Florian MÃllner <fmuellner gnome org>
Date:   Thu Sep 15 16:51:19 2011 +0200

    popup-menu: Add 'sensitive' flag to item parameters
    
    A menu action may not make sense at any time, so add API to mark
    an item insensitive to indicate that its action is currently
    unavailable, but may become activatable at a later point.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=659270

 data/theme/gnome-shell.css |    4 ++++
 js/ui/popupMenu.js         |   36 +++++++++++++++++++++++++++++++++++-
 2 files changed, 39 insertions(+), 1 deletions(-)
---
diff --git a/data/theme/gnome-shell.css b/data/theme/gnome-shell.css
index f61fe6e..9052a13 100644
--- a/data/theme/gnome-shell.css
+++ b/data/theme/gnome-shell.css
@@ -164,6 +164,10 @@ StTooltip StLabel {
     background-color: #4c4c4c;
 }
 
+.popup-menu-item:insensitive {
+    color: #9f9f9f;
+}
+
 .popup-image-menu-item {
 }
 
diff --git a/js/ui/popupMenu.js b/js/ui/popupMenu.js
index ef8a549..490228a 100644
--- a/js/ui/popupMenu.js
+++ b/js/ui/popupMenu.js
@@ -35,6 +35,7 @@ PopupBaseMenuItem.prototype = {
         params = Params.parse (params, { reactive: true,
                                          activate: true,
                                          hover: true,
+                                         sensitive: true,
                                          style_class: null
                                        });
         this.actor = new Shell.GenericContainer({ style_class: 'popup-menu-item',
@@ -52,11 +53,15 @@ PopupBaseMenuItem.prototype = {
         this._columnWidths = null;
         this._spacing = 0;
         this.active = false;
+        this._activatable = params.reactive && params.activate;
+        this.sensitive = this._activatable && params.sensitive;
+
+        this.setSensitive(this.sensitive);
 
         if (params.style_class)
             this.actor.add_style_class_name(params.style_class);
 
-        if (params.reactive && params.activate) {
+        if (this._activatable) {
             this.actor.connect('button-release-event', Lang.bind(this, this._onButtonReleaseEvent));
             this.actor.connect('key-press-event', Lang.bind(this, this._onKeyPressEvent));
         }
@@ -117,6 +122,23 @@ PopupBaseMenuItem.prototype = {
         }
     },
 
+    setSensitive: function(sensitive) {
+        if (!this._activatable)
+            return;
+        if (this.sensitive == sensitive)
+            return;
+
+        this.sensitive = sensitive;
+        this.actor.reactive = sensitive;
+        this.actor.can_focus = sensitive;
+
+        if (sensitive)
+            this.actor.remove_style_pseudo_class('insensitive');
+        else
+            this.actor.add_style_pseudo_class('insensitive');
+        this.emit('sensitive-changed', sensitive);
+    },
+
     destroy: function() {
         this.actor.destroy();
         this.emit('destroy');
@@ -899,6 +921,17 @@ PopupMenuBase.prototype = {
                 this.emit('active-changed', null);
             }
         }));
+        menuItem._sensitiveChangeId = menuItem.connect('sensitive-changed', Lang.bind(this, function(menuItem, sensitive) {
+            if (!sensitive && this._activeMenuItem == menuItem) {
+                if (!this.actor.navigate_focus(menuItem.actor,
+                                               Gtk.DirectionType.TAB_FORWARD,
+                                               true))
+                    this.actor.grab_key_focus();
+            } else if (sensitive && this._activeMenuItem == null) {
+                if (global.stage.get_key_focus() == this.actor)
+                    menuItem.actor.grab_key_focus();
+            }
+        }));
         menuItem._activateId = menuItem.connect('activate', Lang.bind(this, function (menuItem, event) {
             this.emit('activate', menuItem);
             this.close(true);
@@ -906,6 +939,7 @@ PopupMenuBase.prototype = {
         menuItem.connect('destroy', Lang.bind(this, function(emitter) {
             menuItem.disconnect(menuItem._activateId);
             menuItem.disconnect(menuItem._activeChangeId);
+            menuItem.disconnect(menuItem._sensitiveChangeId);
             if (menuItem.menu) {
                 menuItem.menu.disconnect(menuItem._subMenuActivateId);
                 menuItem.menu.disconnect(menuItem._subMenuActiveChangeId);