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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8" />
    <base href="%@">
    <script type="text/javascript" defer="defer">
        // NOTE:
        // Any percent signs in this file must be escaped!
        // Use two escape signs (%%) to display it, this is passed through a format call!

        function appendHTML(html) {
            var node = document.getElementById("Chat");
            var range = document.createRange();
            range.selectNode(node);
            var documentFragment = range.createContextualFragment(html);
            node.appendChild(documentFragment);
        }

        // a coalesced HTML object buffers and outputs DOM objects en masse.
        // saves A LOT of CSS recalculation time when loading many messages.
        // (ex. a long twitter timeline)
        function CoalescedHTML() {
            var self = this;
            this.fragment = document.createDocumentFragment();
            this.timeoutID = 0;
            this.coalesceRounds = 0;
            this.isCoalescing = false;
            this.isConsecutive = undefined;
            this.shouldScroll = undefined;

            var appendElement = function (elem) {
                document.getElementById("Chat").appendChild(elem);
            };

            function outputHTML() {
                var insert = document.getElementById("insert");
                if(!!insert && self.isConsecutive) {
                    insert.parentNode.replaceChild(self.fragment, insert);
                } else {
                    if(insert)
                        insert.parentNode.removeChild(insert);
                    // insert the documentFragment into the live DOM
                    appendElement(self.fragment);
                }
                alignChat(self.shouldScroll);

                // reset state to empty/non-coalescing
                self.shouldScroll = undefined;
                self.isConsecutive = undefined;
                self.isCoalescing = false;
                self.coalesceRounds = 0;
            }

            // creates and returns a new documentFragment, containing all content nodes
            // which can be inserted as a single node.
            function createHTMLNode(html) {
                var range = document.createRange();
                range.selectNode(document.getElementById("Chat"));
                return range.createContextualFragment(html);
            }

            // removes first insert node from the internal fragment.
            function rmInsertNode() {
                var insert = self.fragment.querySelector("#insert");
                if(insert)
                    insert.parentNode.removeChild(insert);
            }

            function setShouldScroll(flag) {
                if(flag && undefined === self.shouldScroll)
                    self.shouldScroll = flag;
            }

            // hook in a custom method to append new data
            // to the chat.
            this.setAppendElementMethod = function (func) {
                if(typeof func === 'function')
                    appendElement = func;
            }

            // (re)start the coalescing timer.
            //   we wait 25ms for a new message to come in.
            //   If we get one, restart the timer and wait another 10ms.
            //   If not, run outputHTML()
            //  We do this a maximum of 400 times, for 10s max that can be spent
            //  coalescing input, since this will block display.
            this.coalesce = function() {
                window.clearTimeout(self.timeoutID);
                self.timeoutID = window.setTimeout(outputHTML, 25);
                self.isCoalescing = true;
                self.coalesceRounds += 1;
                if(400 < self.coalesceRounds)
                    self.cancel();
            }

            // if we need to append content into an insertion div,
            // we need to clear the buffer and cancel the timeout.
            this.cancel = function() {
                if(self.isCoalescing) {
                    window.clearTimeout(self.timeoutID);
                    outputHTML();
                }
            }


            // coalased analogs to the global functions

            this.append = function(html, shouldScroll) {
                // if we started this fragment with a consecuative message,
                // cancel and output before we continue
                if(self.isConsecutive) {
                    self.cancel();
                }
                self.isConsecutive = false;
                rmInsertNode();
                var node = createHTMLNode(html);
                self.fragment.appendChild(node);

                node = null;

                setShouldScroll(shouldScroll);
                self.coalesce();
            }

            this.appendNext = function(html, shouldScroll) {
                if(undefined === self.isConsecutive)
                    self.isConsecutive = true;
                var node = createHTMLNode(html);
                var insert = self.fragment.querySelector("#insert");
                if(insert) {
                    insert.parentNode.replaceChild(node, insert);
                } else {
                    self.fragment.appendChild(node);
                }
                node = null;
                setShouldScroll(shouldScroll);
                self.coalesce();
            }

            this.replaceLast = function (html, shouldScroll) {
                rmInsertNode();
                var node = createHTMLNode(html);
                var lastMessage = self.fragment.lastChild;
                lastMessage.parentNode.replaceChild(node, lastMessage);
                node = null;
                setShouldScroll(shouldScroll);
            }
        }
        var coalescedHTML;

        //Appending new content to the message view
        function appendMessage(html) {
            var shouldScroll;

            // Only call nearBottom() if should scroll is undefined.
            if(undefined === coalescedHTML.shouldScroll) {
                shouldScroll = nearBottom();
            } else {
                shouldScroll = coalescedHTML.shouldScroll;
            }
            appendMessageNoScroll(html, shouldScroll);
        }

        function appendMessageNoScroll(html, shouldScroll) {
            shouldScroll = shouldScroll || false;
            // always try to coalesce new, non-griuped, messages
            coalescedHTML.append(html, shouldScroll)
        }

        function appendNextMessage(html){
            var shouldScroll;
            if(undefined === coalescedHTML.shouldScroll) {
                shouldScroll = nearBottom();
            } else {
                shouldScroll = coalescedHTML.shouldScroll;
            }
            appendNextMessageNoScroll(html, shouldScroll);
        }

        function appendNextMessageNoScroll(html, shouldScroll){
            shouldScroll = shouldScroll || false;
            // only group next messages if we're already coalescing input
            coalescedHTML.appendNext(html, shouldScroll);
        }

        function replaceLastMessage(html){
            var shouldScroll;
            // only replace messages if we're already coalescing
            if(coalescedHTML.isCoalescing){
                if(undefined === coalescedHTML.shouldScroll) {
                    shouldScroll = nearBottom();
                } else {
                    shouldScroll = coalescedHTML.shouldScroll;
                }
                coalescedHTML.replaceLast(html, shouldScroll);
            } else {
                shouldScroll = nearBottom();
                //Retrieve the current insertion point, then remove it
                //This requires that there have been an insertion point... is there a better way to retrieve the last element? -evands
                var insert = document.getElementById("insert");
                if(insert){
                    var parentNode = insert.parentNode;
                    parentNode.removeChild(insert);
                    var lastMessage = document.getElementById("Chat").lastChild;
                    document.getElementById("Chat").removeChild(lastMessage);
                }

                //Now append the message itself
                appendHTML(html);

                alignChat(shouldScroll);
            }
        }

        //Auto-scroll to bottom.  Use nearBottom to determine if a scrollToBottom is desired.
        function nearBottom() {
            return ( document.body.scrollTop >= ( document.body.offsetHeight - ( window.innerHeight * 1.2 ) ) );
        }
        function scrollToBottom() {
            document.body.scrollTop = document.body.offsetHeight;
        }

        //Dynamically exchange the active stylesheet
        function setStylesheet( id, url ) {
            var code = "<style id=\"" + id + "\" type=\"text/css\" media=\"screen,print\">";
            if( url.length )
                code += "@import url( \"" + url + "\" );";
            code += "</style>";
            var range = document.createRange();
            var head = document.getElementsByTagName( "head" ).item(0);
            range.selectNode( head );
            var documentFragment = range.createContextualFragment( code );
            head.removeChild( document.getElementById( id ) );
            head.appendChild( documentFragment );
        }

        /* Converts emoticon images to textual emoticons; all emoticons in message if alt is held */
        document.onclick = function imageCheck() {
            var node = event.target;
            if (node.tagName.toLowerCase() != 'img')
                return;

            imageSwap(node, false);
        }

        /* Converts textual emoticons to images if textToImagesFlag is true, otherwise vice versa */
        function imageSwap(node, textToImagesFlag) {
            var shouldScroll = nearBottom();

            var images = [node];
            if (event.altKey) {
                while (node.id != "Chat" && node.parentNode.id != "Chat")
                    node = node.parentNode;
                images = node.querySelectorAll(textToImagesFlag ? "a" : "img");
            }

            for (var i = 0; i < images.length; i++) {
                textToImagesFlag ? textToImage(images[i]) : imageToText(images[i]);
            }

            alignChat(shouldScroll);
        }

        function textToImage(node) {
            if (!node.getAttribute("isEmoticon"))
                return;
            //Swap the image/text
            var img = document.createElement('img');
            img.setAttribute('src', node.getAttribute('src'));
            img.setAttribute('alt', node.firstChild.nodeValue);
            img.className = node.className;
            node.parentNode.replaceChild(img, node);
        }

        function imageToText(node)
        {
            if (!node.alt)
                return;
            var a = document.createElement('a');
            a.setAttribute('onclick', 'imageSwap(this, true)');
            a.setAttribute('src', node.getAttribute('src'));
            a.setAttribute('isEmoticon', true);
            a.className = node.className;
            var text = document.createTextNode(node.alt);
            a.appendChild(text);
            node.parentNode.replaceChild(a, node);
        }

        //Align our chat to the bottom of the window.  If true is passed, view will also be scrolled down
        function alignChat(shouldScroll) {
            var windowHeight = window.innerHeight;

            if (windowHeight > 0) {
                var contentElement = document.getElementById('Chat');
                var contentHeight = contentElement.offsetHeight;
                var margin = parseFloat(document.defaultView.getComputedStyle(document.body, null).getPropertyValue("margin-bottom"));
                var location = windowHeight - contentHeight - margin;
                if (location > 0) {
                    contentElement.style.position = 'relative';
                    contentElement.style.top = location + 'px';
                } else {
                    contentElement.style.position = 'static';
                }
            }

            if (shouldScroll) scrollToBottom();
        }

        window.onresize = function windowDidResize(){
            alignChat(true/*nearBottom()*/); //nearBottom buggy with inactive tabs
        }

        function initStyle() {
            alignChat(true);
            if(!coalescedHTML)
                coalescedHTML = new CoalescedHTML();
        }
    </script>

    <style type="text/css">
        .actionMessageUserName { display:none; }
        .actionMessageBody:before { content:"*"; }
        .actionMessageBody:after { content:"*"; }
        * { word-wrap:break-word; text-rendering: optimizelegibility; }
        img.scaledToFitImage { height: auto; max-width: 100%%; }
    </style>

    <!-- This style is shared by all variants. !-->
    <style id="baseStyle" type="text/css" media="screen,print">
        %@
    </style>

    <!-- Although we call this mainStyle for legacy reasons, it's actually the variant style !-->
    <style id="mainStyle" type="text/css" media="screen,print">
        @import url( "%@" );
    </style>

</head>
<body onload="initStyle();" style="==bodyBackground==">
%@
<div id="Chat">
</div>
%@
</body>
</html>