
/*
 * weinre is available under *either* the terms of the modified BSD license *or* the
 * MIT License (2008). See http://opensource.org/licenses/alphabetical for full text.
 * 
 * Copyright (c) 2011 IBM Corporation
 */

requireClass ../common/Ex
requireClass ../common/Weinre
requireClass ../common/IDGenerator
requireClass ../common/StackTrace

requireClass ../common/Native

//-----------------------------------------------------------------------------
class Timeline

//-----------------------------------------------------------------------------
static method start
    Running = true

//-----------------------------------------------------------------------------
static method stop
    Running = false

//-----------------------------------------------------------------------------
static method isRunning
    return Running

//-----------------------------------------------------------------------------
static method addRecord_Mark(message)
    if (!Timeline.isRunning()) return
    
    var record = {}

    record.type      = TimelineRecordType.Mark
    record.category  = { name: "scripting" }
    record.startTime = Date.now()
    record.data      = { message: message }
    
    addStackTrace(record, 3)
    
    Weinre.wi.TimelineNotify.addRecordToTimeline(record)

//-----------------------------------------------------------------------------
static method addRecord_EventDispatch(event, name, category)
    if (!Timeline.isRunning()) return
    
    if (!category) category = "scripting"
    var record = {}

    record.type      = TimelineRecordType.EventDispatch
    record.category  = { name: category }
    record.startTime = Date.now()
    record.data      = { type: event.type }
    
    Weinre.wi.TimelineNotify.addRecordToTimeline(record)
    
//-----------------------------------------------------------------------------
static method addRecord_TimerInstall(id, timeout, singleShot)
    if (!Timeline.isRunning()) return
    
    var record = {}

    record.type      = TimelineRecordType.TimerInstall
    record.category  = { name: "scripting" }
    record.startTime = Date.now()
    record.data      = { timerId: id, timeout: timeout, singleShot: singleShot }
    
    addStackTrace(record, 4)
    
    Weinre.wi.TimelineNotify.addRecordToTimeline(record)

//-----------------------------------------------------------------------------
static method addRecord_TimerRemove(id, timeout, singleShot)
    if (!Timeline.isRunning()) return

    var record = {}

    record.type      = TimelineRecordType.TimerRemove
    record.category  = { name: "scripting" }
    record.startTime = Date.now()
    record.data      = { timerId: id, timeout: timeout, singleShot: singleShot }

    addStackTrace(record, 4)
    
    Weinre.wi.TimelineNotify.addRecordToTimeline(record)

//-----------------------------------------------------------------------------
static method addRecord_TimerFire(id, timeout, singleShot)
    if (!Timeline.isRunning()) return

    var record = {}

    record.type      = TimelineRecordType.TimerFire
    record.category  = { name: "scripting" }
    record.startTime = Date.now()
    record.data      = { timerId: id, timeout: timeout, singleShot: singleShot }
    
    Weinre.wi.TimelineNotify.addRecordToTimeline(record)

//-----------------------------------------------------------------------------
static method addRecord_XHRReadyStateChange(method, url, id, xhr)
    if (!Timeline.isRunning()) return

    var record
    
    if (xhr.readyState == XMLHttpRequest.OPENED) {
        record = {
            type:      TimelineRecordType.ResourceSendRequest,
            category:  { name: "loading" },
            startTime: Date.now(),
            data: { 
                identifier:     id,
                url:            url,
                requestMethod:  method
            }
        }
    }
    
    else if (xhr.readyState == XMLHttpRequest.DONE) {
        record = {
            type:      TimelineRecordType.ResourceReceiveResponse,
            category:  { name: "loading" },
            startTime: Date.now(),
            data: {
                identifier:            id,
                statusCode:            xhr.status,
                mimeType:              xhr.getResponseHeader("Content-Type"),
                expectedContentLength: xhr.getResponseHeader("Content-Length"),
                url:                   url
            }
        }
    }
    
    else 
        return
    
    Weinre.wi.TimelineNotify.addRecordToTimeline(record)

//-----------------------------------------------------------------------------
static method installGlobalListeners
    if (applicationCache) {
        applicationCache.addEventListener("checking",    function(e) {Timeline.addRecord_EventDispatch(e, "applicationCache.checking",    "loading")}, false)
        applicationCache.addEventListener("error",       function(e) {Timeline.addRecord_EventDispatch(e, "applicationCache.error",       "loading")}, false)
        applicationCache.addEventListener("noupdate",    function(e) {Timeline.addRecord_EventDispatch(e, "applicationCache.noupdate",    "loading")}, false)
        applicationCache.addEventListener("downloading", function(e) {Timeline.addRecord_EventDispatch(e, "applicationCache.downloading", "loading")}, false)
        applicationCache.addEventListener("progress",    function(e) {Timeline.addRecord_EventDispatch(e, "applicationCache.progress",    "loading")}, false)
        applicationCache.addEventListener("updateready", function(e) {Timeline.addRecord_EventDispatch(e, "applicationCache.updateready", "loading")}, false)
        applicationCache.addEventListener("cached",      function(e) {Timeline.addRecord_EventDispatch(e, "applicationCache.cached",      "loading")}, false)
        applicationCache.addEventListener("obsolete",    function(e) {Timeline.addRecord_EventDispatch(e, "applicationCache.obsolete",    "loading")}, false)
    }
    
    // window.addEventListener("deviceorientation", function(e) {Timeline.addRecord_EventDispatch("window.deviceorientation")}, false)
    window.addEventListener("error",             function(e) {Timeline.addRecord_EventDispatch(e, "window.error")},             false)
    window.addEventListener("hashchange",        function(e) {Timeline.addRecord_EventDispatch(e, "window.hashchange")},        false)
    window.addEventListener("message",           function(e) {Timeline.addRecord_EventDispatch(e, "window.message")},           false)
    window.addEventListener("offline",           function(e) {Timeline.addRecord_EventDispatch(e, "window.offline")},           false)
    window.addEventListener("online",            function(e) {Timeline.addRecord_EventDispatch(e, "window.online")},            false)
    window.addEventListener("scroll",            function(e) {Timeline.addRecord_EventDispatch(e, "window.scroll")},            false)
    
//-----------------------------------------------------------------------------
static method installFunctionWrappers
    window.clearInterval  = wrapped_clearInterval
    window.clearTimeout   = wrapped_clearTimeout
    window.setTimeout     = wrapped_setTimeout
    window.setInterval    = wrapped_setInterval

    window.XMLHttpRequest.prototype.open = wrapped_XMLHttpRequest_open
    window.XMLHttpRequest                = wrapped_XMLHttpRequest

//-----------------------------------------------------------------------------
function addStackTrace(record, skip)
    if (!skip) skip = 1
    
    var trace = new StackTrace(arguments).trace
    
    record.stackTrace = []
    
    for (var i=skip; i<trace.length; i++) {
        record.stackTrace.push({
            functionName: trace[i],
            scriptName:   "",
            lineNumber:   ""
        })
    }
    
//-----------------------------------------------------------------------------
function wrapped_setInterval(code, interval)
    var code = instrumentedTimerCode(code, interval, false)
    var id = Native.setInterval(code, interval)
    
    code.__timerId = id
    
    addTimer(id, interval, false)

    return id

//-----------------------------------------------------------------------------
function wrapped_setTimeout(code, delay)
    var code = instrumentedTimerCode(code, delay, true)
    var id   = Native.setTimeout(code, delay)

    code.__timerId = id
    
    addTimer(id, delay, true)

    return id

//-----------------------------------------------------------------------------
function wrapped_clearInterval(id)
    var result = Native.clearInterval(id)
    
    removeTimer(id, false)
    return result

//-----------------------------------------------------------------------------
function wrapped_clearTimeout(id)
    var result = Native.clearTimeout(id)
    
    removeTimer(id, true)
    return result

//-----------------------------------------------------------------------------
function addTimer(id, timeout, singleShot)
    var timerSet = singleShot ? TimerTimeouts : TimerIntervals
    
    timerSet[id] = {
         id:          id,
         timeout:     timeout,
         singleShot: singleShot
    }
    
    Timeline.addRecord_TimerInstall(id, timeout, singleShot)
    
//-----------------------------------------------------------------------------
function removeTimer(id, singleShot)
    var timerSet = singleShot ? TimerTimeouts : TimerIntervals
    var timer = timerSet[id]
    
    if (!timer) return
    
    Timeline.addRecord_TimerRemove(id, timer.timeout, singleShot)
    
    delete timerSet[id]
    
//-----------------------------------------------------------------------------
function instrumentedTimerCode(code, timeout, singleShot)
    if (typeof(code) != "function") return code
    
    var instrumentedCode = function() {
        var result = code()
        var id     = arguments.callee.__timerId

        Timeline.addRecord_TimerFire(id, timeout, singleShot)

        return result
    }
    
    return instrumentedCode 

//-----------------------------------------------------------------------------
function wrapped_XMLHttpRequest
    var xhr = new Native.XMLHttpRequest()
    xhr.__weinre_id = IDGenerator.next()
    xhr.addEventListener("readystatechange", getXhrEventHandler(xhr), false)
    return xhr

init
    wrapped_XMLHttpRequest.UNSENT           = 0
    wrapped_XMLHttpRequest.OPENED           = 1
    wrapped_XMLHttpRequest.HEADERS_RECEIVED = 2
    wrapped_XMLHttpRequest.LOADING          = 3
    wrapped_XMLHttpRequest.DONE             = 4    

//-----------------------------------------------------------------------------
function wrapped_XMLHttpRequest_open()
    var xhr = this
    xhr.__weinre_method  = arguments[0]
    xhr.__weinre_url     = arguments[1]
    
    var result = Native.XMLHttpRequest_open.apply(xhr, [].slice.call(arguments))
    return result

    
//-----------------------------------------------------------------------------
function getXhrEventHandler(xhr)
    return function(event) {
        Timeline.addRecord_XHRReadyStateChange(xhr.__weinre_method, xhr.__weinre_url, xhr.__weinre_id, xhr)
    }
    
//-----------------------------------------------------------------------------
init 
    var Running = false
    
    var TimerTimeouts  = {}
    var TimerIntervals = {}

    var TimelineRecordType = {
            EventDispatch:            0,
            Layout:                   1,
            RecalculateStyles:        2,
            Paint:                    3,
            ParseHTML:                4,
            TimerInstall:             5,
            TimerRemove:              6,
            TimerFire:                7,
            XHRReadyStateChange:      8,
            XHRLoad:                  9,
            EvaluateScript:          10,
            Mark:                    11,
            ResourceSendRequest:     12,
            ResourceReceiveResponse: 13,
            ResourceFinish:          14,
            FunctionCall:            15,
            ReceiveResourceData:     16,
            GCEvent:                 17,
            MarkDOMContent:          18,
            MarkLoad:                19,
            ScheduleResourceRequest: 20
    }

    Timeline.installGlobalListeners()
    Timeline.installFunctionWrappers()