Add gdata content search to file_manager

chrome/browser/resources/file_manager/js/util.js

 // Copyright (c) 2012 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.
 
 /**
  * Namespace for utility functions.
  */
 var util = {
   /**
    * Returns a function that console.log's its arguments, prefixed by |msg|.
@@ skipping 481 matching lines @@
            (event.shiftKey ? 'Shift-' : '') +
            (event.metaKey ? 'Meta-' : '');
   },
 
   /**
    * A wrapper for navigator.onLine that allows for easy debug override.
    * @return {boolean} True if offline.
    */
   isOffline: function() {
     return !navigator.onLine;
+  },
+
+  /*
+   * Tests if |path| references special, internaly used directory in which
+   * creating new entries is not allowed.
+   * Currently, only paths used for gdata content search match this description
+   * (gdata content search root directory and directories that contain gdata
+   * content search results).
+   *
+   * @param {string} path Path which is being tested.
+   * @return {boolean} Test result.
+   */
+  isSpecialReadonlyDirectory: function(path) {
+    // If the path is not search root or it's child, we're fine.
+    if (path.search(util.GDATA_SEARCH_ROOT_PATH) != 0 &&
+        path + '/' != util.GDATA_SEARCH_ROOT_PATH) {
+      return false;
+    }
+
+    var pathComponents = path.split('/');
+
+    // We should not create entries on path if it's either gdata search root,
+    // or its immediate child.
+    var lengthDifference =
+        pathComponents.length - util.GDATA_SEARCH_ROOT_COMPONENTS.length;
+    return lengthDifference == 0 || lengthDifference == 1;
+  },
+
+  /*
+   * Root path used for displaying gdata content search results.
+   * Search results will be shown in directory 'GDATA_SEARCH_ROOT_PATH/query'.
+   *
+   * @const
+   * @type {string}
+   */
+  GDATA_SEARCH_ROOT_PATH: '/gdata/.search',
+
+  /*
+   * @const
+   * @type {Array.<string>}
+   */
+  GDATA_SEARCH_ROOT_COMPONENTS: ['', 'gdata', '.search'],
+
+  /*
+   * Creates directory path in which gdata content search results for |query|
+   * should be displayed.
+   *
+   * @param {string} query Search query.
+   * @return {string} Virtual directory path for search results.
+   */
+  createGDataSearchPath: function(query) {
+    return util.GDATA_SEARCH_ROOT_PATH + '/' + query;
+  },
+
+  /*
+   * Tests if the given path is a gdata search result path, and if it is,
+   * returns file's fileName in virtual search file system, its gdata resourceId
+   * and the display name that should be used when the file is shown in file
+   * browser.
+   *
+   * @param {string} path The potential gdata search result path.
+   * @return {object.<string, stringi, string>} Object that will contain file's
+   *     fileName, displayName and resourceId; or null if the path is not gdata
+   *     search result path.
+   */
+  getFileAndDisplayNameForGDataSearchResult: function(path) {
+    // Nothing to do if the path is not under gdata search root path.
+    if (path.search(util.GDATA_SEARCH_ROOT_PATH) != 0)
+      return null;
+
+    var pathComponents = path.split('/');
+
+    // Search result should be formatted like:
+    //     gdataSearchRoot/query/result
+    if (pathComponents.length != util.GDATA_SEARCH_ROOT_COMPONENTS.length + 2)
+      return null;
+    for (var i = 0; i < util.GDATA_SEARCH_ROOT_COMPONENTS.length; i++) {
+      if (pathComponents[i] != util.GDATA_SEARCH_ROOT_COMPONENTS[i])
+        return null;
+    }
+
+    // Search result file name should be formatted like:
+    //    resource_id.referenced_file_name
+    // We should display referenced file name only.
+    var result = {};
+    result.fileName = pathComponents.pop();
+    result.displayName =
+        result.fileName.slice(result.fileName.indexOf('.') + 1);
+    result.resourceId =
+        result.fileName.substr(0, result.fileName.indexOf('.'));
+
+    if (result.fileName.length > 0 && result.displayName.length > 0) {
+      return result;
+    } else {
+      return null;
+    }
   }
 };