history.js

flex平台下的red5流媒体播放器

                var urlActions = {
                    back: false, 
                    forward: false, 
                    set: false
                }

                if ((window.location.hash == initialHash || window.location.href == initialHref) && (bsl == 1)) {
                    urlActions.back = true;
                    // FIXME: could this ever be a forward button?
                    // we can't clear it because we still need to check for forwards. Ugg.
                    // clearInterval(this.locationTimer);
                    handleBackButton();
                }
                
                // first check to see if we could have gone forward. We always halt on
                // a no-hash item.
                if (forwardStack.length > 0) {
                    if (forwardStack[forwardStack.length-1].flexAppUrl == getHash()) {
                        urlActions.forward = true;
                        handleForwardButton();
                    }
                }

                // ok, that didn't work, try someplace back in the history stack
                if ((bsl >= 2) && (backStack[bsl - 2])) {
                    if (backStack[bsl - 2].flexAppUrl == getHash()) {
                        urlActions.back = true;
                        handleBackButton();
                    }
                }
                
                if (!urlActions.back && !urlActions.forward) {
                    var foundInStacks = {
                        back: -1, 
                        forward: -1
                    }

                    for (var i = 0; i < backStack.length; i++) {
                        if (backStack[i].flexAppUrl == getHash() && i != (bsl - 2)) {
                            arbitraryUrl = true;
                            foundInStacks.back = i;
                        }
                    }
                    for (var i = 0; i < forwardStack.length; i++) {
                        if (forwardStack[i].flexAppUrl == getHash() && i != (bsl - 2)) {
                            arbitraryUrl = true;
                            foundInStacks.forward = i;
                        }
                    }
                    handleArbitraryUrl();
                }

                // Firefox changed; do a callback into BrowserManager to tell it.
                currentHref = document.location.href;
                var flexAppUrl = getHash();
                if (flexAppUrl == '') {
                    //flexAppUrl = defaultHash;
                }
                //ADR: to fix multiple
                if (typeof BrowserHistory_multiple != "undefined" && BrowserHistory_multiple == true) {
                    var pl = getPlayers();
                    for (var i = 0; i < pl.length; i++) {
                        pl[i].browserURLChange(flexAppUrl);
                    }
                } else {
                    getPlayer().browserURLChange(flexAppUrl);
                }
            }
        }
        //setTimeout(checkForUrlChange, 50);
    }

    /* Write an anchor into the page to legitimize it as a URL for Firefox et al. */
    function addAnchor(flexAppUrl)
    {
       if (document.getElementsByName(flexAppUrl).length == 0) {
           getAnchorElement().innerHTML += "<a name='" + flexAppUrl + "'>" + flexAppUrl + "</a>";
       }
    }

    var _initialize = function () {
        if (browser.ie)
        {
            var scripts = document.getElementsByTagName('script');
            for (var i = 0, s; s = scripts[i]; i++) {
                if (s.src.indexOf("history.js") > -1) {
                    var iframe_location = (new String(s.src)).replace("history.js", "historyFrame.html");
                }
            }
            historyFrameSourcePrefix = iframe_location + "?";
            var src = historyFrameSourcePrefix;

            var iframe = document.createElement("iframe");
            iframe.id = 'ie_historyFrame';
            iframe.name = 'ie_historyFrame';
            //iframe.src = historyFrameSourcePrefix;
            try {
                document.body.appendChild(iframe);
            } catch(e) {
                setTimeout(function() {
                    document.body.appendChild(iframe);
                }, 0);
            }
        }

        if (browser.safari)
        {
            var rememberDiv = document.createElement("div");
            rememberDiv.id = 'safari_rememberDiv';
            document.body.appendChild(rememberDiv);
            rememberDiv.innerHTML = '<input type="text" id="safari_remember_field" style="width: 500px;">';

            var formDiv = document.createElement("div");
            formDiv.id = 'safari_formDiv';
            document.body.appendChild(formDiv);

            var reloader_content = document.createElement('div');
            reloader_content.id = 'safarireloader';
            var scripts = document.getElementsByTagName('script');
            for (var i = 0, s; s = scripts[i]; i++) {
                if (s.src.indexOf("history.js") > -1) {
                    html = (new String(s.src)).replace(".js", ".html");
                }
            }
            reloader_content.innerHTML = '<iframe id="safarireloader-iframe" src="about:blank" frameborder="no" scrolling="no"></iframe>';
            document.body.appendChild(reloader_content);
            reloader_content.style.position = 'absolute';
            reloader_content.style.left = reloader_content.style.top = '-9999px';
            iframe = reloader_content.getElementsByTagName('iframe')[0];

            if (document.getElementById("safari_remember_field").value != "" ) {
                historyHash = document.getElementById("safari_remember_field").value.split(",");
            }

        }

        if (browser.firefox)
        {
            var anchorDiv = document.createElement("div");
            anchorDiv.id = 'firefox_anchorDiv';
            document.body.appendChild(anchorDiv);
        }
        
        //setTimeout(checkForUrlChange, 50);
    }

    return {
        historyHash: historyHash, 
        backStack: function() { return backStack; }, 
        forwardStack: function() { return forwardStack }, 
        getPlayer: getPlayer, 
        initialize: function(src) {
            _initialize(src);
        }, 
        setURL: function(url) {
            document.location.href = url;
        }, 
        getURL: function() {
            return document.location.href;
        }, 
        getTitle: function() {
            return document.title;
        }, 
        setTitle: function(title) {
            try {
                backStack[backStack.length - 1].title = title;
            } catch(e) { }
            //if on safari, set the title to be the empty string. 
            if (browser.safari) {
                if (title == "") {
                    try {
                    var tmp = window.location.href.toString();
                    title = tmp.substring((tmp.lastIndexOf("/")+1), tmp.lastIndexOf("#"));
                    } catch(e) {
                        title = "";
                    }
                }
            }
            document.title = title;
        }, 
        setDefaultURL: function(def)
        {
            defaultHash = def;
            def = getHash();
            //trailing ? is important else an extra frame gets added to the history
            //when navigating back to the first page.  Alternatively could check
            //in history frame navigation to compare # and ?.
            if (browser.ie)
            {
                window['_ie_firstload'] = true;
                var sourceToSet = historyFrameSourcePrefix + def;
                var func = function() {
                    getHistoryFrame().src = sourceToSet;
                    window.location.replace("#" + def);
                    setInterval(checkForUrlChange, 50);
                }
                try {
                    func();
                } catch(e) {
                    window.setTimeout(function() { func(); }, 0);
                }
            }

            if (browser.safari)
            {
                currentHistoryLength = history.length;
                if (historyHash.length == 0) {
                    historyHash[currentHistoryLength] = def;
                    var newloc = "#" + def;
                    window.location.replace(newloc);
                } else {
                    //alert(historyHash[historyHash.length-1]);
                }
                //setHash(def);
                setInterval(checkForUrlChange, 50);
            }
            
            
            if (browser.firefox || browser.opera)
            {
                var reg = new RegExp("#" + def + "$");
                if (window.location.toString().match(reg)) {
                } else {
                    var newloc ="#" + def;
                    window.location.replace(newloc);
                }
                setInterval(checkForUrlChange, 50);
                //setHash(def);
            }

        }, 

        /* Set the current browser URL; called from inside BrowserManager to propagate
         * the application state out to the container.
         */
        setBrowserURL: function(flexAppUrl, objectId) {
            if (browser.ie && typeof objectId != "undefined") {
                currentObjectId = objectId;
            }
           //fromIframe = fromIframe || false;
           //fromFlex = fromFlex || false;
           //alert("setBrowserURL: " + flexAppUrl);
           //flexAppUrl = (flexAppUrl == "") ? defaultHash : flexAppUrl ;

           var pos = document.location.href.indexOf('#');
           var baseUrl = pos != -1 ? document.location.href.substr(0, pos) : document.location.href;
           var newUrl = baseUrl + '#' + flexAppUrl;

           if (document.location.href != newUrl && document.location.href + '#' != newUrl) {
               currentHref = newUrl;
               addHistoryEntry(baseUrl, newUrl, flexAppUrl);
               currentHistoryLength = history.length;
           }

           return false;
        }, 

        browserURLChange: function(flexAppUrl) {
            var objectId = null;
            if (browser.ie && currentObjectId != null) {
                objectId = currentObjectId;
            }
            pendingURL = '';
            
            if (typeof BrowserHistory_multiple != "undefined" && BrowserHistory_multiple == true) {
                var pl = getPlayers();
                for (var i = 0; i < pl.length; i++) {
                    try {
                        pl[i].browserURLChange(flexAppUrl);
                    } catch(e) { }
                }
            } else {
                try {
                    getPlayer(objectId).browserURLChange(flexAppUrl);
                } catch(e) { }
            }

            currentObjectId = null;
        }

    }

})();

// Initialization

// Automated unit testing and other diagnostics

function setURL(url)
{
    document.location.href = url;
}

function backButton()
{
    history.back();
}

function forwardButton()
{
    history.forward();
}

function goForwardOrBackInHistory(step)
{
    history.go(step);
}

//BrowserHistoryUtils.addEvent(window, "load", function() { BrowserHistory.initialize(); });
(function(i) {
    var u =navigator.userAgent;var e=/*@cc_on!@*/false; 
    var st = setTimeout;
    if(/webkit/i.test(u)){
        st(function(){
            var dr=document.readyState;
            if(dr=="loaded"||dr=="complete"){i()}
            else{st(arguments.callee,10);}},10);
    } else if((/mozilla/i.test(u)&&!/(compati)/.test(u)) || (/opera/i.test(u))){
        document.addEventListener("DOMContentLoaded",i,false);
    } else if(e){
    (function(){
        var t=document.createElement('doc:rdy');
        try{t.doScroll('left');
            i();t=null;
        }catch(e){st(arguments.callee,0);}})();
    } else{
        window.onload=i;
    }
})( function() {BrowserHistory.initialize();} );