Add gdata content search to file_manager

chrome/browser/resources/file_manager/js/directory_model.js

Index: chrome/browser/resources/file_manager/js/directory_model.js
diff --git a/chrome/browser/resources/file_manager/js/directory_model.js b/chrome/browser/resources/file_manager/js/directory_model.js
index 0cc59331dc9f9b8719b390d0b09362e8b5c02c60..9471941dff8cc9df05537fd06755a272a878a198 100644
--- a/chrome/browser/resources/file_manager/js/directory_model.js
+++ b/chrome/browser/resources/file_manager/js/directory_model.js
@@ -57,6 +57,21 @@ function DirectoryModel(root, singleSelection, showGData, metadataCache) {
    * @type {Object.<string, boolean>}
    */
   this.volumeReadOnlyStatus_ = {};
+
+  /**
+   * Directory in which search results are displayed. Not null iff search
+   * results are being displayed.
+   * @private
+   * @type {Entry}
+   */
+  this.searchDirEntry_ = null;
+
+  /**
+   * Is search in progress.
+   * @private
+   * @type {boolean}
+   */
+  this.isSearching_ = false;
 }
 
 /**
@@ -93,6 +108,21 @@ DirectoryModel.DOWNLOADS_DIRECTORY = 'Downloads';
 DirectoryModel.GDATA_DIRECTORY = 'gdata';
 
 /**
+ * Root path used for displaying gdata content search results.
+ * Search results will be shown in directory 'GDATA_SEARCH_ROOT_PATH/query'.
+ *
+ * @const
+ * @type {string}
+ */
+DirectoryModel.GDATA_SEARCH_ROOT_PATH = '/gdata/.search';
+
+/**
+ * @const
+ * @type {Array.<string>}
+ */
+DirectoryModel.GDATA_SEARCH_ROOT_COMPONENTS = ['', 'gdata', '.search'];
+
+/**
  * DirectoryModel extends cr.EventTarget.
  */
 DirectoryModel.prototype.__proto__ = cr.EventTarget.prototype;
@@ -150,6 +180,13 @@ DirectoryModel.prototype.isReadOnly = function() {
 };
 
 /**
+ * @return {boolean} True if search is in progress.
+ */
+DirectoryModel.prototype.isSearching = function() {
+  return this.isSearching_;
+};
+
+/**
  * @param {strin} path Path to check.
  * @return {boolean} True if the |path| is read only.
  */
@@ -205,6 +242,16 @@ DirectoryModel.prototype.getCurrentDirEntry = function() {
 };
 
 /**
+ * If search results are being displayed, returns search directory, else returns
+ * current directory.
+ *
+ * @return {DirectoryEntry} search or directory entry.
+ */
+DirectoryModel.prototype.getSearchOrCurrentDirEntry = function() {
+  return this.searchDirEntry_ || this.currentDirEntry_;
+};
+
+/**
  * @return {string} Path for the current directory.
  */
 DirectoryModel.prototype.getCurrentDirPath = function() {
@@ -409,7 +456,7 @@ DirectoryModel.prototype.createScanner_ = function(list, successCallback) {
   }
 
   return new DirectoryModel.Scanner(
-      this.currentDirEntry_,
+      this.getSearchOrCurrentDirEntry(),
       list,
       onSuccess,
       onFailure,
@@ -497,6 +544,38 @@ DirectoryModel.prototype.prefetchCacheForSorting_ = function(entries,
 };
 
 /**
+ * Gets name that should be displayed in the UI for the entry.
+ * @param {string} path Full path of the entry whose display name we are
+ *                      getting.
+ * @param {string} defaultName Default name to use if no name is calculated.
+ * @return {string} Name to be used for display.
+ */
+DirectoryModel.prototype.getDisplayName = function(path, defaultName) {
+  var searchResultName = util.getFileAndDisplayNameForGDataSearchResult(path);
+  return searchResultName ? searchResultName.displayName : defaultName;
+};
+
+/**
+ * Creates file name that should be used as a new file name in filesystem
+ * operations while renaming. It the given entry is not a gdata search result
+ * entry, |newName| will be used.
+ *
+ * @private
+ * @param {Entry} entry Entry which is being renamed.
+ * @param {string} displayName The new file name provided by user.
+ * @return {string} File name that should be used in renaming filesystem
+ *                 operations.
+ */
+DirectoryModel.prototype.getEntryName_ = function(entry, displayName) {
+  // If we are renaming gdata search result, we'll have to format newName to
+  // use in file system operation like: <resource_id>.<file_name>.
+  var searchResultName =
+      util.getFileAndDisplayNameForGDataSearchResult(entry.fullPath);
+  return searchResultName ? searchResultName.resourceId + '.' + displayName :
+                            displayName;
+};
+
+/**
  * Delete the list of files and directories from filesystem and
  * update the file list.
  * @param {Array.<Entry>} entries Entries to delete.
@@ -533,11 +612,16 @@ DirectoryModel.prototype.deleteEntries = function(entries, opt_callback) {
  * @param {string} name Filename.
  */
 DirectoryModel.prototype.onEntryChanged = function(name) {
-  var currentEntry = this.currentDirEntry_;
+  var currentEntry = this.getSearchOrCurrentDirEntry();
+  if (currentEntry != this.currentDirEntry_)
+    return;
   var dm = this.fileList_;
   var self = this;
 
   function onEntryFound(entry) {
+    // Do nothing if current directory changed during async operations.
+    if (self.currentDirEntry_ != currentEntry)
+      return;
     self.prefetchCacheForSorting_([entry], function() {
       // Do nothing if current directory changed during async operations.
       if (self.currentDirEntry_ != currentEntry)
@@ -565,7 +649,7 @@ DirectoryModel.prototype.onEntryChanged = function(name) {
       dm.splice(index, 1);
   };
 
-  util.resolvePath(this.currentDirEntry_, name, onEntryFound, onError);
+  util.resolvePath(currentEntry, name, onEntryFound, onError);
 };
 
 /**
@@ -584,11 +668,12 @@ DirectoryModel.prototype.findIndexByName_ = function(name) {
 /**
  * Rename the entry in the filesystem and update the file list.
  * @param {Entry} entry Entry to rename.
- * @param {string} newName New name.
+ * @param {string} newDisplayName New name.
  * @param {function} errorCallback Called on error.
  * @param {function} opt_successCallback Called on success.
  */
-DirectoryModel.prototype.renameEntry = function(entry, newName, errorCallback,
+DirectoryModel.prototype.renameEntry = function(entry, newDisplayName,
+                                                errorCallback,
                                                 opt_successCallback) {
   var self = this;
   function onSuccess(newEntry) {
@@ -597,25 +682,31 @@ DirectoryModel.prototype.renameEntry = function(entry, newName, errorCallback,
       var index = fileList.indexOf(entry);
       if (index >= 0)
         fileList.splice(index, 1, newEntry);
-      self.selectEntry(newName);
+      self.selectEntry(newEntry.name);
       // If the entry doesn't exist in the list it mean that it updated from
       // outside (probably by directory rescan).
       if (opt_successCallback)
         opt_successCallback();
     });
   }
-  entry.moveTo(this.currentDirEntry_, newName, onSuccess, errorCallback);
+
+  var newEntryName = this.getEntryName_(entry, newDisplayName);
+  entry.moveTo(this.getSearchOrCurrentDirEntry(), newEntryName, onSuccess,
+               errorCallback);
 };
 
 /**
  * Checks if current directory contains a file or directory with this name.
- * @param {string} newName Name to check.
+ * @param {string} entry Entry to which newName will be given.
+ * @param {string} displayName Name to check.
  * @param {function(boolean, boolean?)} callback Called when the result's
  *     available. First parameter is true if the entry exists and second
  *     is true if it's a file.
  */
-DirectoryModel.prototype.doesExist = function(newName, callback) {
-  util.resolvePath(this.currentDirEntry_, newName,
+DirectoryModel.prototype.doesExist = function(entry, displayName, callback) {
+  var entryName = this.getEntryName_(entry, displayName);
+
+  util.resolvePath(this.getSearchOrCurrentDirEntry(), entryName,
       function(entry) {
         callback(true, entry.isFile);
       },
@@ -661,7 +752,15 @@ DirectoryModel.prototype.createDirectory = function(name, successCallback,
  * @param {string} path New current directory path.
  */
 DirectoryModel.prototype.changeDirectory = function(path) {
-  this.resolveDirectory(path, function(directoryEntry) {
+  var targetPath = path;
+  // We should not be changing directory to gdata search path. If we do, default
+  // to gdata root.
+  if (DirectoryModel.isGDataSearchPath(path)) {
+    console.error('Attempt to change directory to search path.');
+    targetPath = '/' + DirectoryModel.GDATA_DIRECTORY;
+  }
+
+  this.resolveDirectory(targetPath, function(directoryEntry) {
     this.changeDirectoryEntry_(false, directoryEntry);
   }.bind(this), function(error) {
     console.error('Error changing directory to ' + path + ': ', error);
@@ -731,6 +830,7 @@ DirectoryModel.prototype.changeDirectoryOrRoot = function(path) {
  */
 DirectoryModel.prototype.changeDirectoryEntry_ = function(initial, dirEntry,
                                                           opt_callback) {
+  this.clearSearch_();
   var previous = this.currentDirEntry_;
   this.currentDirEntry_ = dirEntry;
   function onRescanComplete() {
@@ -1109,6 +1209,55 @@ DirectoryModel.prototype.prepareUnmount = function(rootPath) {
 };
 
 /**
+ * Performs search and displays results. The search type is dependent on the
+ * current directory. If we are currently on gdata, server side content search
+ * over gdata mount point. If the current directory is not on the gdata, file
+ * name search over current directory wil be performed.
+ *
+ * @param {string} query Query that will be searched for.
+ */
+DirectoryModel.prototype.search = function(query) {
+   if (!query) {
+     this.clearSearch_();
+     return;
+   }
+
+   this.isSearching_ = true;
+
+   // If we are offline, let's fallback to file name search inside dir.
+   if (this.getRootType() == DirectoryModel.RootType.GDATA &&
+       !util.isOffline()) {
+     var self = this;
+     // Create shadow directory which will contein search results.
+     this.root_.getDirectory(DirectoryModel.createGDataSearchPath(query),
+         {create: false},
+         function(dir) {
+           self.searchDirEntry_ = dir;
+           self.rescanSoon();
+         });
+   } else {
+     this.searchDirEntry_ = this.currentDirEntry_;
+     this.addFilter(
+         'searchbox',
+          function(e) {
+            return e.name.substring(0, query.length) == query;
+          });
+   }
+};
+
+
+/**
+ * Clears any state set by previous searches.
+ * @private
+ */
+DirectoryModel.prototype.clearSearch_ = function() {
+  this.searchDirEntry_ = null;
+  this.isSearching_ = false;
+  // This will trigger rescan.
+  this.removeFilter('searchbox');
+};
+
+/**
  * @param {string} path Any path.
  * @return {string} The root path.
  */
@@ -1173,6 +1322,28 @@ DirectoryModel.isRootPath = function(path) {
 };
 
 /**
+ * Checks if the provided path is under gdata search.
+ *
+ * @param {string} path Path to be tested.
+ * @return {boolean} Is the path gdata search path.
+ */
+DirectoryModel.isGDataSearchPath = function(path) {
+  return path == DirectoryModel.GDATA_SEARCH_ROOT_PATH ||
+         path.search(DirectoryModel.GDATA_SEARCH_ROOT_PATH + '/') == 0;
+};
+
+/**
+ * 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.
+ */
+DirectoryModel.createGDataSearchPath = function(query) {
+  return DirectoryModel.GDATA_SEARCH_ROOT_PATH + '/' + query;
+};
+
+/**
  * @constructor
  * @extends cr.EventTarget
  * @param {DirectoryEntry} dir Directory to scan.