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// Copyright 2014 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 extension API.
var binding = require('binding').Binding.create('extension');
var messaging = require('messaging');
var runtimeNatives = requireNative('runtime');
var GetExtensionViews = runtimeNatives.GetExtensionViews;
var chrome = requireNative('chrome').GetChrome();
var inIncognitoContext = requireNative('process').InIncognitoContext();
var sendRequestIsDisabled = requireNative('process').IsSendRequestDisabled();
var contextType = requireNative('process').GetContextType();
var manifestVersion = requireNative('process').GetManifestVersion();
// This should match chrome.windows.WINDOW_ID_NONE.
//
// We can't use chrome.windows.WINDOW_ID_NONE directly because the
// chrome.windows API won't exist unless this extension has permission for it;
// which may not be the case.
var WINDOW_ID_NONE = -1;
binding.registerCustomHook(function(bindingsAPI, extensionId) {
var extension = bindingsAPI.compiledApi;
if (manifestVersion < 2) {
chrome.self = extension;
extension.inIncognitoTab = inIncognitoContext;
}
extension.inIncognitoContext = inIncognitoContext;
var apiFunctions = bindingsAPI.apiFunctions;
apiFunctions.setHandleRequest('getViews', function(properties) {
var windowId = WINDOW_ID_NONE;
var type = 'ALL';
if (properties) {
if (properties.type != null) {
type = properties.type;
}
if (properties.windowId != null) {
windowId = properties.windowId;
}
}
return GetExtensionViews(windowId, type);
});
apiFunctions.setHandleRequest('getBackgroundPage', function() {
return GetExtensionViews(-1, 'BACKGROUND')[0] || null;
});
apiFunctions.setHandleRequest('getExtensionTabs', function(windowId) {
if (windowId == null)
windowId = WINDOW_ID_NONE;
return GetExtensionViews(windowId, 'TAB');
});
apiFunctions.setHandleRequest('getURL', function(path) {
path = String(path);
if (!path.length || path[0] != '/')
path = '/' + path;
return 'chrome-extension://' + extensionId + path;
});
// Alias several messaging deprecated APIs to their runtime counterparts.
var mayNeedAlias = [
// Types
'Port',
// Functions
'connect', 'sendMessage', 'connectNative', 'sendNativeMessage',
// Events
'onConnect', 'onConnectExternal', 'onMessage', 'onMessageExternal'
];
$Array.forEach(mayNeedAlias, function(alias) {
// Checking existence isn't enough since some functions are disabled via
// getters that throw exceptions. Assume that any getter is such a function.
if (chrome.runtime &&
$Object.hasOwnProperty(chrome.runtime, alias) &&
chrome.runtime.__lookupGetter__(alias) === undefined) {
extension[alias] = chrome.runtime[alias];
}
});
apiFunctions.setUpdateArgumentsPreValidate('sendRequest',
$Function.bind(messaging.sendMessageUpdateArguments,
null, 'sendRequest', false /* hasOptionsArgument */));
apiFunctions.setHandleRequest('sendRequest',
function(targetId, request, responseCallback) {
if (sendRequestIsDisabled)
throw new Error(sendRequestIsDisabled);
var port = chrome.runtime.connect(targetId || extensionId,
{name: messaging.kRequestChannel});
messaging.sendMessageImpl(port, request, responseCallback);
});
if (sendRequestIsDisabled) {
extension.onRequest.addListener = function() {
throw new Error(sendRequestIsDisabled);
};
if (contextType == 'BLESSED_EXTENSION') {
extension.onRequestExternal.addListener = function() {
throw new Error(sendRequestIsDisabled);
};
}
}
});
exports.$set('binding', binding.generate());
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