/usr/share/empathy/Template.html is in empathy-common 3.8.6-0ubuntu9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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<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 (client.zoomImage(node) || !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;
if (windowHeight - contentHeight > 0) {
contentElement.style.position = 'relative';
contentElement.style.top = (windowHeight - contentHeight) + '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>
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