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gaia/tv_apps/smart-system/js/remote_debugger.js

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+'use strict';
+/* global ScreenManager, ModalDialog */
+
+(function(exports) {
+
+  /**
+   * RemoteDebugger displays a prompt asking the user if they want to enable
+   * remote debugging on their device. This is generally called when the user
+   * attempts to access the device from the App Manager.
+   * @requires ModalDialog
+   * @requires ScreenManager
+   * @class RemoteDebugger
+   */
+  function RemoteDebugger() {
+    window.addEventListener('mozChromeEvent', this);
+  }
+
+  RemoteDebugger.prototype = {
+
+    /**
+     * General event handler interface.
+     * Displays the modal dialog when we needed.
+     * @memberof RemoteDebugger.prototype
+     * @param  {DOMEvent} evt The event.
+     */
+    handleEvent: function(e) {
+      if (e.detail.type !== 'remote-debugger-prompt') {
+        return;
+      }
+
+      // We want the user attention, so we need to turn the screen on
+      // if it's off.
+      if (!ScreenManager.screenEnabled) {
+        ScreenManager.turnScreenOn();
+      }
+
+      // Reusing the ModalDialog infrastructure.
+      ModalDialog.showWithPseudoEvent({
+        text: 'remoteDebuggerMessage',
+        type: 'confirm',
+        callback: this._dispatchEvent.bind(this, true),
+        cancel: this._dispatchEvent.bind(this, false)
+      });
+    },
+
+    /**
+     * Dispatches an event based on the user selection of the modal dialog.
+     * @memberof RemoteDebugger.prototype
+     * @param  {Boolean} value True if the user enabled the remote debugger.
+     */
+    _dispatchEvent: function(value) {
+      var event = document.createEvent('CustomEvent');
+      event.initCustomEvent('mozContentEvent', true, true,
+                            { type: 'remote-debugger-prompt',
+                              value: value });
+      window.dispatchEvent(event);
+    }
+  };
+
+  exports.RemoteDebugger = RemoteDebugger;
+
+}(window));