1 files changed, 86 insertions, 0 deletions
diff --git a/apps/system/js/activities.js b/apps/system/js/activities.js
new file mode 100644
index 0000000..f4db861
--- /dev/null
+++ b/apps/system/js/activities.js
@@ -0,0 +1,86 @@
+/* -*- Mode: js; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+
+'use strict';
+
+var Activities = {
+  init: function act_init() {
+    window.addEventListener('mozChromeEvent', this);
+  },
+
+  handleEvent: function act_handleEvent(evt) {
+    switch (evt.type) {
+      case 'mozChromeEvent':
+        var detail = evt.detail;
+        switch (detail.type) {
+          case 'activity-choice':
+            this.chooseActivity(detail);
+            break;
+        }
+        break;
+    }
+  },
+
+  chooseActivity: function chooseActivity(detail) {
+    this._id = detail.id;
+
+    var choices = detail.choices;
+    if (choices.length === 1) {
+      this.choose('0');
+    } else {
+      // Since the mozChromeEvent could be triggered by a 'click', and gecko
+      // event are synchronous make sure to exit the event loop before
+      // showing the list.
+      setTimeout((function nextTick() {
+        var activityName = navigator.mozL10n.get('activity-' + detail.name);
+        ListMenu.request(this._listItems(choices), activityName,
+                         this.choose.bind(this), this.cancel.bind(this));
+      }).bind(this));
+    }
+  },
+
+  choose: function act_choose(choice) {
+    var returnedChoice = {
+      id: this._id,
+      type: 'activity-choice',
+      value: choice
+    };
+
+    this._sendEvent(returnedChoice);
+    delete this._id;
+  },
+
+  cancel: function act_cancel(value) {
+    var returnedChoice = {
+      id: this._id,
+      type: 'activity-choice',
+      value: -1
+    };
+
+    this._sendEvent(returnedChoice);
+    delete this._id;
+  },
+
+  _sendEvent: function act_sendEvent(value) {
+    var event = document.createEvent('CustomEvent');
+    event.initCustomEvent('mozContentEvent', true, true, value);
+    window.dispatchEvent(event);
+  },
+
+  _listItems: function act_listItems(choices) {
+    var items = [];
+
+    choices.forEach(function(choice, index) {
+      var app = Applications.getByManifestURL(choice.manifest);
+      items.push({
+        label: new ManifestHelper(app.manifest).name,
+        icon: choice.icon,
+        value: index
+      });
+    });
+
+    return items;
+  }
+};
+
+Activities.init();