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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 bindings for the extension API.
var extensionNatives = requireNative('extension');
var GetExtensionViews = extensionNatives.GetExtensionViews;
var OpenChannelToExtension = extensionNatives.OpenChannelToExtension;
var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
var inIncognitoContext = requireNative('process').InIncognitoContext();
chrome.extension = chrome.extension || {};
var manifestVersion = requireNative('process').GetManifestVersion();
if (manifestVersion < 2) {
chrome.self = chrome.extension;
chrome.extension.inIncognitoTab = inIncognitoContext;
}
chrome.extension.inIncognitoContext = inIncognitoContext;
// 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;
chromeHidden.registerCustomHook('extension',
function(bindingsAPI, extensionId) {
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) || null;
});
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;
});
function sendMessageUpdateArguments(functionName) {
// Align missing (optional) function arguments with the arguments that
// schema validation is expecting, e.g.
// extension.sendRequest(req) -> extension.sendRequest(null, req)
// extension.sendRequest(req, cb) -> extension.sendRequest(null, req, cb)
var args = Array.prototype.splice.call(arguments, 1); // skip functionName
var lastArg = args.length - 1;
// responseCallback (last argument) is optional.
var responseCallback = null;
if (typeof(args[lastArg]) == 'function')
responseCallback = args[lastArg--];
// request (second argument) is required.
var request = args[lastArg--];
// targetId (first argument, extensionId in the manfiest) is optional.
var targetId = null;
if (lastArg >= 0)
targetId = args[lastArg--];
if (lastArg != -1)
throw new Error('Invalid arguments to ' + functionName + '.');
return [targetId, request, responseCallback];
}
apiFunctions.setUpdateArgumentsPreValidate('sendRequest',
sendMessageUpdateArguments.bind(null, 'sendRequest'));
apiFunctions.setUpdateArgumentsPreValidate('sendMessage',
sendMessageUpdateArguments.bind(null, 'sendMessage'));
apiFunctions.setHandleRequest('sendRequest',
function(targetId, request, responseCallback) {
var port = chrome.extension.connect(targetId || extensionId,
{name: chromeHidden.kRequestChannel});
chromeHidden.Port.sendMessageImpl(port, request, responseCallback);
});
apiFunctions.setHandleRequest('sendMessage',
function(targetId, message, responseCallback) {
var port = chrome.extension.connect(targetId || extensionId,
{name: chromeHidden.kMessageChannel});
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.
// extension.connect() -> extension.connect(null, null)
// extension.connect({}) -> extension.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.setHandleRequest('connect', function(targetId, connectInfo) {
if (!targetId)
targetId = extensionId;
var name = '';
if (connectInfo && connectInfo.name)
name = connectInfo.name;
var portId = OpenChannelToExtension(extensionId, targetId, name);
if (portId >= 0)
return chromeHidden.Port.createPort(portId, name);
throw new Error('Error connecting to extension ' + targetId);
});
});
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