Site Settings Desktop: Implement protocol handler section.

chrome/browser/resources/settings/site_settings/protocol_handlers.js

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview
+ * 'protocol-handlers' is the polymer element for showing the
+ * protocol handlers category under Site Settings.
+ */
+
+var MenuActions = {
+  SET_DEFAULT: 'SetDefault',
+  REMOVE: 'Remove',
+};
+
+/**
+ * @typedef {{host: string,
+ *            protocol: string,
+ *            spec: string}}
+ */
+var HandlerEntry;
+
+/**
+ * @typedef {{default_handler: number,
+ *            handlers: !Array<!HandlerEntry>,
+ *            has_policy_recommendations: boolean,
+ *            is_default_handler_set_by_user: boolean,
+ *            protocol: string}}
+ */
+var ProtocolEntry;
+
+Polymer({
+  is: 'protocol-handlers',
+
+  behaviors: [SiteSettingsBehavior, WebUIListenerBehavior],
+
+  properties: {
+    /**
+     * Represents the state of the main toggle shown for the category.
+     */
+    categoryEnabled: Boolean,
+
+    /**
+     * Array of protocols and their handlers.
+     * @type {!Array<!ProtocolEntry>}
+     */
+    protocols: Array,
+
+    /**
+     * The possible menu actions.
+     * @type {MenuActions}
+     */
+    menuActions_: {
+      type: Object,
+      value: MenuActions,
+      readOnly: true,
+    },
+  },
+
+  ready: function() {
+    this.addWebUIListener('setHandlersEnabled',
+        this.setHandlersEnabled_.bind(this));
+    this.addWebUIListener('setProtocolHandlers',
+        this.setProtocolHandlers_.bind(this));
+    this.addWebUIListener('setIgnoredProtocolHandlers',
+        this.setIgnoredProtocolHandlers_.bind(this));
+    this.browserProxy.initializeProtocolHandlerList();
+  },
+
+  /**
+   * Obtains the description for the main toggle.
+   * @param {number} categoryEnabled Whether the main toggle is enabled.
+   * @return {string} The description to use.
+   * @private
+   */
+  computeHandlersDescription_: function(categoryEnabled) {
+    return this.computeCategoryDesc(
+        settings.ContentSettingsTypes.PROTOCOL_HANDLERS, categoryEnabled, true);
+  },
+
+  /**
+   * Returns whether the given index matches the default handler.
+   * @param {number} index The index to evaluate.
+   * @param {number} defaultHandler The default handler index.
+   * @return {boolean} Whether the item is default.
+   * @private
+   */
+  isDefault_: function(index, defaultHandler) {
+    return defaultHandler == index;
+  },
+
+  /**
+   * Updates the main toggle to set it enabled/disabled.
+   * @param {boolean} enabled The state to set.
+   * @private
+   */
+  setHandlersEnabled_: function(enabled) {
+    this.categoryEnabled = enabled;
+  },
+
+  /**
+   * Updates the list of protocol handlers.
+   * @param {!Array<!ProtocolEntry>} protocols The new protocol handler list.
+   * @private
+   */
+  setProtocolHandlers_: function(protocols) {
+    this.protocols = protocols;
+  },
+
+  /**
+   * Updates the list of ignored protocol handlers.
+   * @param {!Array<!ProtocolEntry>} args The new (ignored) protocol handler
+   *     list.
+   * @private
+   */
+  setIgnoredProtocolHandlers_: function(args) {
+    // TODO(finnur): Figure this out. Have yet to be able to trigger the C++
+    // side to send this.
+  },
+
+  /**
+   * A handler when the toggle is flipped.
+   * @private
+   */
+  onToggleChange_: function(event) {
+    this.browserProxy.setProtocolHandlerDefault(this.categoryEnabled);
+  },
+
+  /**
+   * A handler when an action is selected in the action menu.
+   * @private
+   */
+  onActionMenuIronActivate_: function(event) {
+    var protocol = event.model.item.protocol;
+    var url = event.model.item.spec;
+    if (event.detail.selected == MenuActions.SET_DEFAULT) {
+      this.browserProxy.setProtocolDefault(protocol, url);
+    } else if (event.detail.selected == MenuActions.REMOVE) {
+      this.browserProxy.removeProtocolHandler(protocol, url);
+    }
+  },
+});