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// Copyright (c) 2010 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.
/**
* @fileoverview this file provides the bootstrap interface between the
* Chrome event and extension bindings JavaScript files, and the CEEE
* native IE interface, as well as initialization hooks for the native
* interface.
*/
// Console is diverted to nativeContentScriptApi.Log method.
var console = console || {};
// Any function declared native in the Chrome extension bindings files
// is diverted to the ceee namespace to allow the IE JS engine
// to grok the code.
var ceee = ceee || {};
(function () {
// Keep a reference to the global environment in
// effect during boostrap script parsing.
var global = this;
var chromeHidden = {};
var nativeContentScriptApi = null;
// Supply a JSON implementation by leeching off closure.
global.JSON = goog.json;
global.JSON.stringify = JSON.serialize;
ceee.AttachEvent = function (eventName) {
nativeContentScriptApi.AttachEvent(eventName);
};
ceee.DetachEvent = function (eventName) {
nativeContentScriptApi.DetachEvent(eventName);
};
ceee.OpenChannelToExtension = function (sourceId, targetId, name) {
return nativeContentScriptApi.OpenChannelToExtension(sourceId,
targetId,
name);
};
ceee.CloseChannel = function (portId) {
return nativeContentScriptApi.CloseChannel(portId);
};
ceee.PortAddRef = function (portId) {
return nativeContentScriptApi.PortAddRef(portId);
};
ceee.PortRelease = function (portId) {
return nativeContentScriptApi.PortRelease(portId);
};
ceee.PostMessage = function (portId, msg) {
return nativeContentScriptApi.PostMessage(portId, msg);
};
ceee.GetChromeHidden = function () {
return chromeHidden;
};
// This function is invoked from the native CEEE implementation by name
// to pass in the native CEEE interface implementation at the start of
// script engine initialization. This allows us to provide logging
// and any other required or convenient services during the initialization
// of other boostrap scripts.
ceee.startInit_ = function (nativenativeContentScriptApi, extensionId) {
nativeContentScriptApi = nativenativeContentScriptApi;
};
// Last uninitialization callback.
ceee.onUnload_ = function () {
// Dispatch the onUnload event.
chromeHidden.dispatchOnUnload();
// Release the native API as very last act.
nativeContentScriptApi = null;
};
// This function is invoked from the native CEEE implementation by name
// to pass in the extension ID, and to allow any final initialization of
// the script environment before the content scripts themselves are loaded.
ceee.endInit_ = function (nativenativeContentScriptApi, extensionId) {
chrome.initExtension(extensionId);
// Provide the native implementation with the the the
// event notification dispatchers.
nativeContentScriptApi.onLoad = chromeHidden.dispatchOnLoad;
nativeContentScriptApi.onUnload = ceee.onUnload_;
// And the port notification dispatchers.
// function(portId, channelName, tab, extensionId)
nativeContentScriptApi.onPortConnect = chromeHidden.Port.dispatchOnConnect;
// function(portId)
nativeContentScriptApi.onPortDisconnect =
chromeHidden.Port.dispatchOnDisconnect;
// function(msg, portId)
nativeContentScriptApi.onPortMessage =
chromeHidden.Port.dispatchOnMessage;
// TODO(siggi@chromium.org): If there is a different global
// environment at this point (i.e. we have cloned the scripting
// engine for a new window) this is where we can restore goog,
// JSON and chrome.
// Delete the ceee namespace from globals.
delete ceee;
}
console.log = console.log || function (msg) {
if (nativeContentScriptApi)
nativeContentScriptApi.Log("info", msg);
};
console.error = console.error || function (msg) {
if (nativeContentScriptApi)
nativeContentScriptApi.Log("error", msg);
}
// Provide an indexOf member for arrays if it's not already there
// to satisfy the Chrome extension bindings expectations.
if (!Array.prototype.indexOf) {
Array.prototype.indexOf = function(elt /*, from*/) {
var len = this.length >>> 0;
var from = Number(arguments[1]) || 0;
from = (from < 0) ? Math.ceil(from) : Math.floor(from);
if (from < 0)
from += len;
for (; from < len; from++) {
if (from in this && this[from] === elt)
return from;
}
return -1;
}
};
})();
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