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// 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 runtime API.
var binding = require('binding').Binding.create('runtime');
var runtimeNatives = requireNative('runtime');
var extensionNatives = requireNative('extension');
var GetExtensionViews = extensionNatives.GetExtensionViews;
var OpenChannelToExtension = runtimeNatives.OpenChannelToExtension;
var OpenChannelToNativeApp = runtimeNatives.OpenChannelToNativeApp;
var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
var sendMessageUpdateArguments =
require('miscellaneous_bindings').sendMessageUpdateArguments;
binding.registerCustomHook(function(binding, id, contextType) {
var apiFunctions = binding.apiFunctions;
var runtime = binding.compiledApi;
//
// Unprivileged APIs.
//
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;
});
apiFunctions.setUpdateArgumentsPreValidate('sendMessage',
sendMessageUpdateArguments.bind(null, 'sendMessage'));
apiFunctions.setUpdateArgumentsPreValidate('sendNativeMessage',
sendMessageUpdateArguments.bind(null, 'sendNativeMessage'));
apiFunctions.setHandleRequest('sendMessage',
function(targetId, message, responseCallback) {
var port = runtime.connect(targetId || runtime.id,
{name: chromeHidden.kMessageChannel});
chromeHidden.Port.sendMessageImpl(port, message, responseCallback);
});
apiFunctions.setHandleRequest('sendNativeMessage',
function(targetId, message, responseCallback) {
var port = runtime.connectNative(targetId);
chromeHidden.Port.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)
targetId = runtime.id;
var name = '';
if (connectInfo && connectInfo.name)
name = connectInfo.name;
// Don't let orphaned content scripts communicate with their extension.
// http://crbug.com/168263
if (!chromeHidden.wasUnloaded) {
var portId = OpenChannelToExtension(runtime.id, targetId, name);
if (portId >= 0)
return chromeHidden.Port.createPort(portId, name);
}
throw new Error('Error connecting to extension ' + targetId);
});
//
// Privileged APIs.
//
if (contextType != 'BLESSED_EXTENSION')
return;
apiFunctions.setHandleRequest('connectNative',
function(nativeAppName) {
if (!chromeHidden.wasUnloaded) {
var portId = OpenChannelToNativeApp(runtime.id, nativeAppName);
if (portId >= 0)
return chromeHidden.Port.createPort(portId, '');
}
throw new Error('Error connecting to native app: ' + nativeAppName);
});
apiFunctions.setCustomCallback('getBackgroundPage',
function(name, request, response) {
if (request.callback) {
var bg = GetExtensionViews(-1, 'BACKGROUND')[0] || null;
request.callback(bg);
}
request.callback = null;
});
});
exports.binding = binding.generate();
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