chrome/renderer/resources/extensions/file_system_custom_bindings.js

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // Custom binding for the fileSystem API.
   6
   7 var binding = require('binding').Binding.create('fileSystem');
   8 var sendRequest = require('sendRequest');
   9
  10 var getFileBindingsForApi =
  11     require('fileEntryBindingUtil').getFileBindingsForApi;
  12 var fileBindings = getFileBindingsForApi('fileSystem');
  13 var bindFileEntryCallback = fileBindings.bindFileEntryCallback;
  14 var entryIdManager = fileBindings.entryIdManager;
  15 var fileSystemNatives = requireNative('file_system_natives');
  16
  17 binding.registerCustomHook(function(bindingsAPI) {
  18   var apiFunctions = bindingsAPI.apiFunctions;
  19   var fileSystem = bindingsAPI.compiledApi;
  20
  21   function bindFileEntryFunction(functionName) {
  22     apiFunctions.setUpdateArgumentsPostValidate(
  23         functionName, function(fileEntry, callback) {
  24       var fileSystemName = fileEntry.filesystem.name;
  25       var relativePath = $String.slice(fileEntry.fullPath, 1);
  26       return [fileSystemName, relativePath, callback];
  27     });
  28   }
  29   $Array.forEach(['getDisplayPath', 'getWritableEntry', 'isWritableEntry'],
  30                   bindFileEntryFunction);
  31
  32   $Array.forEach(['getWritableEntry', 'chooseEntry', 'restoreEntry'],
  33                   function(functionName) {
  34     bindFileEntryCallback(functionName, apiFunctions);
  35   });
  36
  37   apiFunctions.setHandleRequest('retainEntry', function(fileEntry) {
  38     var id = entryIdManager.getEntryId(fileEntry);
  39     if (!id)
  40       return '';
  41     var fileSystemName = fileEntry.filesystem.name;
  42     var relativePath = $String.slice(fileEntry.fullPath, 1);
  43
  44     sendRequest.sendRequest(this.name, [id, fileSystemName, relativePath],
  45       this.definition.parameters, {});
  46     return id;
  47   });
  48
  49   apiFunctions.setHandleRequest('isRestorable',
  50       function(id, callback) {
  51     var savedEntry = entryIdManager.getEntryById(id);
  52     if (savedEntry) {
  53       sendRequest.safeCallbackApply(
  54           'fileSystem.isRestorable',
  55           {},
  56           callback,
  57           [true]);
  58     } else {
  59       sendRequest.sendRequest(
  60           this.name, [id, callback], this.definition.parameters, {});
  61     }
  62   });
  63
  64   apiFunctions.setUpdateArgumentsPostValidate('restoreEntry',
  65       function(id, callback) {
  66     var savedEntry = entryIdManager.getEntryById(id);
  67     if (savedEntry) {
  68       // We already have a file entry for this id so pass it to the callback and
  69       // send a request to the browser to move it to the back of the LRU.
  70       sendRequest.safeCallbackApply(
  71           'fileSystem.restoreEntry',
  72           {},
  73           callback,
  74           [savedEntry]);
  75       return [id, false, null];
  76     } else {
  77       // Ask the browser process for a new file entry for this id, to be passed
  78       // to |callback|.
  79       return [id, true, callback];
  80     }
  81   });
  82
  83   apiFunctions.setCustomCallback('requestFileSystem',
  84       function(name, request, callback, response) {
  85     var fileSystem;
  86     if (response && response.file_system_id) {
  87       fileSystem = fileSystemNatives.GetIsolatedFileSystem(
  88           response.file_system_id, response.file_system_path);
  89     }
  90     sendRequest.safeCallbackApply(
  91         'fileSystem.requestFileSystem',
  92         request,
  93         callback,
  94         [fileSystem]);
  95   });
  96
  97   // TODO(benwells): Remove these deprecated versions of the functions.
  98   fileSystem.getWritableFileEntry = function() {
  99     console.log("chrome.fileSystem.getWritableFileEntry is deprecated");
 100     console.log("Please use chrome.fileSystem.getWritableEntry instead");
 101     $Function.apply(fileSystem.getWritableEntry, this, arguments);
 102   };
 103
 104   fileSystem.isWritableFileEntry = function() {
 105     console.log("chrome.fileSystem.isWritableFileEntry is deprecated");
 106     console.log("Please use chrome.fileSystem.isWritableEntry instead");
 107     $Function.apply(fileSystem.isWritableEntry, this, arguments);
 108   };
 109
 110   fileSystem.chooseFile = function() {
 111     console.log("chrome.fileSystem.chooseFile is deprecated");
 112     console.log("Please use chrome.fileSystem.chooseEntry instead");
 113     $Function.apply(fileSystem.chooseEntry, this, arguments);
 114   };
 115 });
 116
 117 exports.bindFileEntryCallback = bindFileEntryCallback;
 118 exports.binding = binding.generate();