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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 runtime API.
var binding = require('binding').Binding.create('runtime');
var messaging = require('messaging');
var runtimeNatives = requireNative('runtime');
var process = requireNative('process');
var forEach = require('utils').forEach;
var backgroundPage = window;
var backgroundRequire = require;
var contextType = process.GetContextType();
if (contextType == 'BLESSED_EXTENSION' ||
contextType == 'UNBLESSED_EXTENSION') {
var manifest = runtimeNatives.GetManifest();
if (manifest.app && manifest.app.background) {
// Get the background page if one exists. Otherwise, default to the current
// window.
backgroundPage = runtimeNatives.GetExtensionViews(-1, 'BACKGROUND')[0];
if (backgroundPage) {
var GetModuleSystem = requireNative('v8_context').GetModuleSystem;
backgroundRequire = GetModuleSystem(backgroundPage).require;
} else {
backgroundPage = window;
}
}
}
// For packaged apps, all windows use the bindFileEntryCallback from the
// background page so their FileEntry objects have the background page's context
// as their own. This allows them to be used from other windows (including the
// background page) after the original window is closed.
if (window == backgroundPage) {
var lastError = require('lastError');
var fileSystemNatives = requireNative('file_system_natives');
var GetIsolatedFileSystem = fileSystemNatives.GetIsolatedFileSystem;
var bindDirectoryEntryCallback = function(functionName, apiFunctions) {
apiFunctions.setCustomCallback(functionName,
function(name, request, callback, response) {
if (callback) {
if (!response) {
callback();
return;
}
var fileSystemId = response.fileSystemId;
var baseName = response.baseName;
var fs = GetIsolatedFileSystem(fileSystemId);
try {
fs.root.getDirectory(baseName, {}, callback, function(fileError) {
lastError.run('runtime.' + functionName,
'Error getting Entry, code: ' + fileError.code,
request.stack,
callback);
});
} catch (e) {
lastError.run('runtime.' + functionName,
'Error: ' + e.stack,
request.stack,
callback);
}
}
});
};
} else {
// Force the runtime API to be loaded in the background page. Using
// backgroundPageModuleSystem.require('runtime') is insufficient as
// requireNative is only allowed while lazily loading an API.
backgroundPage.chrome.runtime;
var bindDirectoryEntryCallback = backgroundRequire(
'runtime').bindDirectoryEntryCallback;
}
binding.registerCustomHook(function(binding, id, contextType) {
var apiFunctions = binding.apiFunctions;
var runtime = binding.compiledApi;
//
// Unprivileged APIs.
//
if (id != '')
runtime.id = id;
apiFunctions.setHandleRequest('getManifest', function() {
return runtimeNatives.GetManifest();
});
apiFunctions.setHandleRequest('getURL', function(path) {
path = String(path);
if (!path.length || path[0] != '/')
path = '/' + path;
return 'chrome-extension://' + id + path;
});
var sendMessageUpdateArguments = messaging.sendMessageUpdateArguments;
apiFunctions.setUpdateArgumentsPreValidate('sendMessage',
$Function.bind(sendMessageUpdateArguments, null, 'sendMessage',
true /* hasOptionsArgument */));
apiFunctions.setUpdateArgumentsPreValidate('sendNativeMessage',
$Function.bind(sendMessageUpdateArguments, null, 'sendNativeMessage',
false /* hasOptionsArgument */));
apiFunctions.setHandleRequest('sendMessage',
function(targetId, message, options, responseCallback) {
var connectOptions = {name: messaging.kMessageChannel};
forEach(options, function(k, v) {
connectOptions[k] = v;
});
var port = runtime.connect(targetId || runtime.id, connectOptions);
messaging.sendMessageImpl(port, message, responseCallback);
});
apiFunctions.setHandleRequest('sendNativeMessage',
function(targetId, message, responseCallback) {
var port = runtime.connectNative(targetId);
messaging.sendMessageImpl(port, message, responseCallback);
});
apiFunctions.setUpdateArgumentsPreValidate('connect', function() {
// Align missing (optional) function arguments with the arguments that
// schema validation is expecting, e.g.
// runtime.connect() -> runtime.connect(null, null)
// runtime.connect({}) -> runtime.connect(null, {})
var nextArg = 0;
// targetId (first argument) is optional.
var targetId = null;
if (typeof(arguments[nextArg]) == 'string')
targetId = arguments[nextArg++];
// connectInfo (second argument) is optional.
var connectInfo = null;
if (typeof(arguments[nextArg]) == 'object')
connectInfo = arguments[nextArg++];
if (nextArg != arguments.length)
throw new Error('Invalid arguments to connect.');
return [targetId, connectInfo];
});
apiFunctions.setUpdateArgumentsPreValidate('connectNative',
function(appName) {
if (typeof(appName) !== 'string') {
throw new Error('Invalid arguments to connectNative.');
}
return [appName];
});
apiFunctions.setHandleRequest('connect', function(targetId, connectInfo) {
if (!targetId) {
// runtime.id is only defined inside extensions. If we're in a webpage,
// the best we can do at this point is to fail.
if (!runtime.id) {
throw new Error('chrome.runtime.connect() called from a webpage must ' +
'specify an Extension ID (string) for its first ' +
'argument');
}
targetId = runtime.id;
}
var name = '';
if (connectInfo && connectInfo.name)
name = connectInfo.name;
var includeTlsChannelId =
!!(connectInfo && connectInfo.includeTlsChannelId);
var portId = runtimeNatives.OpenChannelToExtension(targetId, name,
includeTlsChannelId);
if (portId >= 0)
return messaging.createPort(portId, name);
});
//
// Privileged APIs.
//
if (contextType != 'BLESSED_EXTENSION')
return;
apiFunctions.setHandleRequest('connectNative',
function(nativeAppName) {
var portId = runtimeNatives.OpenChannelToNativeApp(runtime.id,
nativeAppName);
if (portId >= 0)
return messaging.createPort(portId, '');
throw new Error('Error connecting to native app: ' + nativeAppName);
});
apiFunctions.setCustomCallback('getBackgroundPage',
function(name, request, callback, response) {
if (callback) {
var bg = runtimeNatives.GetExtensionViews(-1, 'BACKGROUND')[0] || null;
callback(bg);
}
});
bindDirectoryEntryCallback('getPackageDirectoryEntry', apiFunctions);
});
exports.$set('bindDirectoryEntryCallback', bindDirectoryEntryCallback);
exports.$set('binding', binding.generate());
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