Move web_request_internal_custom_bindings.js and web_request_custom_bindings.js

chrome/renderer/resources/extensions/web_request_internal_custom_bindings.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.
-
-// Custom binding for the webRequestInternal API.
-
-var binding = require('binding').Binding.create('webRequestInternal');
-var eventBindings = require('event_bindings');
-var sendRequest = require('sendRequest').sendRequest;
-var validate = require('schemaUtils').validate;
-var utils = require('utils');
-var idGeneratorNatives = requireNative('id_generator');
-
-var webRequestInternal;
-
-function GetUniqueSubEventName(eventName) {
-  return eventName + "/" + idGeneratorNatives.GetNextId();
-}
-
-// WebRequestEventImpl object. This is used for special webRequest events
-// with extra parameters. Each invocation of addListener creates a new named
-// sub-event. That sub-event is associated with the extra parameters in the
-// browser process, so that only it is dispatched when the main event occurs
-// matching the extra parameters.
-//
-// Example:
-//   chrome.webRequest.onBeforeRequest.addListener(
-//       callback, {urls: 'http://*.google.com/*'});
-//   ^ callback will only be called for onBeforeRequests matching the filter.
-function WebRequestEventImpl(eventName, opt_argSchemas, opt_extraArgSchemas,
-                             opt_eventOptions, opt_webViewInstanceId) {
-  if (typeof eventName != 'string')
-    throw new Error('chrome.WebRequestEvent requires an event name.');
-
-  this.eventName = eventName;
-  this.argSchemas = opt_argSchemas;
-  this.extraArgSchemas = opt_extraArgSchemas;
-  this.webViewInstanceId = opt_webViewInstanceId || 0;
-  this.subEvents = [];
-  this.eventOptions = eventBindings.parseEventOptions(opt_eventOptions);
-  if (this.eventOptions.supportsRules) {
-    this.eventForRules =
-        new eventBindings.Event(eventName, opt_argSchemas, opt_eventOptions,
-                                opt_webViewInstanceId);
-  }
-}
-
-// Test if the given callback is registered for this event.
-WebRequestEventImpl.prototype.hasListener = function(cb) {
-  if (!this.eventOptions.supportsListeners)
-    throw new Error('This event does not support listeners.');
-  return this.findListener_(cb) > -1;
-};
-
-// Test if any callbacks are registered fur thus event.
-WebRequestEventImpl.prototype.hasListeners = function() {
-  if (!this.eventOptions.supportsListeners)
-    throw new Error('This event does not support listeners.');
-  return this.subEvents.length > 0;
-};
-
-// Registers a callback to be called when this event is dispatched. If
-// opt_filter is specified, then the callback is only called for events that
-// match the given filters. If opt_extraInfo is specified, the given optional
-// info is sent to the callback.
-WebRequestEventImpl.prototype.addListener =
-    function(cb, opt_filter, opt_extraInfo) {
-  if (!this.eventOptions.supportsListeners)
-    throw new Error('This event does not support listeners.');
-  // NOTE(benjhayden) New APIs should not use this subEventName trick! It does
-  // not play well with event pages. See downloads.onDeterminingFilename and
-  // ExtensionDownloadsEventRouter for an alternative approach.
-  var subEventName = GetUniqueSubEventName(this.eventName);
-  // Note: this could fail to validate, in which case we would not add the
-  // subEvent listener.
-  validate($Array.slice(arguments, 1), this.extraArgSchemas);
-  webRequestInternal.addEventListener(
-      cb, opt_filter, opt_extraInfo, this.eventName, subEventName,
-      this.webViewInstanceId);
-
-  var subEvent = new eventBindings.Event(subEventName, this.argSchemas);
-  var subEventCallback = cb;
-  if (opt_extraInfo && opt_extraInfo.indexOf('blocking') >= 0) {
-    var eventName = this.eventName;
-    subEventCallback = function() {
-      var requestId = arguments[0].requestId;
-      try {
-        var result = $Function.apply(cb, null, arguments);
-        webRequestInternal.eventHandled(
-            eventName, subEventName, requestId, result);
-      } catch (e) {
-        webRequestInternal.eventHandled(
-            eventName, subEventName, requestId);
-        throw e;
-      }
-    };
-  } else if (opt_extraInfo && opt_extraInfo.indexOf('asyncBlocking') >= 0) {
-    var eventName = this.eventName;
-    subEventCallback = function() {
-      var details = arguments[0];
-      var requestId = details.requestId;
-      var handledCallback = function(response) {
-        webRequestInternal.eventHandled(
-            eventName, subEventName, requestId, response);
-      };
-      $Function.apply(cb, null, [details, handledCallback]);
-    };
-  }
-  $Array.push(this.subEvents,
-      {subEvent: subEvent, callback: cb, subEventCallback: subEventCallback});
-  subEvent.addListener(subEventCallback);
-};
-
-// Unregisters a callback.
-WebRequestEventImpl.prototype.removeListener = function(cb) {
-  if (!this.eventOptions.supportsListeners)
-    throw new Error('This event does not support listeners.');
-  var idx;
-  while ((idx = this.findListener_(cb)) >= 0) {
-    var e = this.subEvents[idx];
-    e.subEvent.removeListener(e.subEventCallback);
-    if (e.subEvent.hasListeners()) {
-      console.error(
-          'Internal error: webRequest subEvent has orphaned listeners.');
-    }
-    $Array.splice(this.subEvents, idx, 1);
-  }
-};
-
-WebRequestEventImpl.prototype.findListener_ = function(cb) {
-  for (var i in this.subEvents) {
-    var e = this.subEvents[i];
-    if (e.callback === cb) {
-      if (e.subEvent.hasListener(e.subEventCallback))
-        return i;
-      console.error('Internal error: webRequest subEvent has no callback.');
-    }
-  }
-
-  return -1;
-};
-
-WebRequestEventImpl.prototype.addRules = function(rules, opt_cb) {
-  if (!this.eventOptions.supportsRules)
-    throw new Error('This event does not support rules.');
-  this.eventForRules.addRules(rules, opt_cb);
-};
-
-WebRequestEventImpl.prototype.removeRules =
-    function(ruleIdentifiers, opt_cb) {
-  if (!this.eventOptions.supportsRules)
-    throw new Error('This event does not support rules.');
-  this.eventForRules.removeRules(ruleIdentifiers, opt_cb);
-};
-
-WebRequestEventImpl.prototype.getRules = function(ruleIdentifiers, cb) {
-  if (!this.eventOptions.supportsRules)
-    throw new Error('This event does not support rules.');
-  this.eventForRules.getRules(ruleIdentifiers, cb);
-};
-
-binding.registerCustomHook(function(api) {
-  var apiFunctions = api.apiFunctions;
-
-  apiFunctions.setHandleRequest('addEventListener', function() {
-    var args = $Array.slice(arguments);
-    sendRequest(this.name, args, this.definition.parameters,
-                {forIOThread: true});
-  });
-
-  apiFunctions.setHandleRequest('eventHandled', function() {
-    var args = $Array.slice(arguments);
-    sendRequest(this.name, args, this.definition.parameters,
-                {forIOThread: true});
-  });
-});
-
-var WebRequestEvent = utils.expose('WebRequestEvent',
-                                   WebRequestEventImpl,
-                                   { functions: [
-  'hasListener',
-  'hasListeners',
-  'addListener',
-  'removeListener',
-  'addRules',
-  'removeRules',
-  'getRules'
-] });
-
-webRequestInternal = binding.generate();
-exports.binding = webRequestInternal;
-exports.WebRequestEvent = WebRequestEvent;