Slice MD downloads into more components

chrome/browser/resources/md_downloads/action_service.js

+// Copyright 2015 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.
+
+cr.define('downloads', function() {
+  /**
+   * @param {string} chromeSendName
+   * @return {function(string):void} A chrome.send() callback with curried name.
+   */
+  function chromeSendWithId(chromeSendName) {
+    return function(id) { chrome.send(chromeSendName, [id]); };
+  }
+
+  /** @constructor */
+  function ActionService() {}
+
+  ActionService.prototype = {
+    /** @param {string} id ID of the download to cancel. */
+    cancel: chromeSendWithId('cancel'),
+
+    /** Instructs the browser to clear all finished downloads. */
+    clearAll: function() {
+      if (loadTimeData.getBoolean('allowDeletingHistory')) {
+        chrome.send('clearAll');
+        this.search('');
+      }
+    },
+
+    /** @param {string} id ID of the dangerous download to discard. */
+    discardDangerous: chromeSendWithId('discardDangerous'),
+
+    /** @param {string} id ID of the download that the user started dragging. */
+    drag: chromeSendWithId('drag'),
+
+    /** Opens the current local destination for downloads. */
+    openDownloadsFolder: chrome.send.bind(chrome, 'openDownloadsFolder'),
+
+    /**
+     * @param {string} id ID of the download to run locally on the user's box.
+     */
+    openFile: chromeSendWithId('openFile'),
+
+    /** @param {string} id ID the of the progressing download to pause. */
+    pause: chromeSendWithId('pause'),
+
+    /** @param {string} id ID of the finished download to remove. */
+    remove: chromeSendWithId('remove'),
+
+    /** @param {string} id ID of the paused download to resume. */
+    resume: chromeSendWithId('resume'),
+
+    /**
+     * @param {string} id ID of the dangerous download to save despite
+     *     warnings.
+     */
+    saveDangerous: chromeSendWithId('saveDangerous'),
+
+    /** @param {string} searchText What to search for. */
+    search: function(searchText) {
+      // Split quoted terms (e.g., 'The "lazy" dog' => ['The', 'lazy', 'dog']).
+      function trim(s) { return s.trim(); }
+      chrome.send('getDownloads', searchText.split(/"([^"]*)"/).map(trim));
+    },
+
+    /**
+     * Shows the local folder a finished download resides in.
+     * @param {string} id ID of the download to show.
+     */
+    show: chromeSendWithId('show'),
+
+    /** Undo download removal. */
+    undo: chrome.send.bind(chrome, 'undo'),
+  };
+
+  return {ActionService: ActionService};
+});