/*
CSSHttpRequest
Copyright 2008 nb.io - http://nb.io/
Licensed under Apache License, Version 2.0 - http://www.apache.org/licenses/LICENSE-2.0.html
*/
(function() {
var chr = window.CSSHttpRequest = {};
chr.id = 0; chr.requests = {};
chr.MATCH_ORDINAL = /#c(\d+)/;
chr.MATCH_URL = /url\("?data\:[^,]*,([^")]+)"?\)/;
chr.get = function(url, callback) {
var id = ++chr.id;
var iframe = document.createElement("iframe");
iframe.src = document.location;
iframe.style.position = "absolute";
iframe.style.left = iframe.style.top = "-1000px";
iframe.style.width = iframe.style.height = 0;
document.documentElement.appendChild(iframe);
var r = chr.requests[id] = { id: id, iframe: iframe, document: iframe.contentDocument || iframe.contentWindow.document, callback: callback };
r.document.open("text/html", false);
r.document.write("");
r.document.write("");
r.document.write(""); r.document.write(""); r.document.write("");
r.document.close();
};
chr.sandbox = function(w) { };
chr.callback = function(id) {
var r = chr.requests[id];
var data = chr.parse(r); r.callback(data);
window.setTimeout(function() {
var r = chr.requests[id];
try {
r.iframe.parentElement.removeChild(r.iframe);
} catch (e) {
};
delete chr.requests[id];
}, 0);
};
chr.parse = function(r) {
var data = [];
try {
var rules = r.document.styleSheets[0].cssRules || r.document.styleSheets[0].rules;
for (var i = 0; i < rules.length; i++) {
try {
var r = rules.item ? rules.item(i) : rules[i];
var ord = r.selectorText.match(chr.MATCH_ORDINAL)[1];
var val = r.style.backgroundImage.match(chr.MATCH_URL)[1]; data[ord] = val;
}
catch (e)
{ }
}
}
catch (e) {
r.document.getElementsByTagName("link")[0].setAttribute("media", "screen");
var x = r.document.createElement("div"); x.innerHTML = "foo";
r.document.body.appendChild(x);
var ord = 0;
try {
while (1) {
x.id = "c" + ord;
var style = r.document.defaultView.getComputedStyle(x, null);
var bg = style["background-image"] || style.backgroundImage || style.getPropertyValue("background-image");
var val = bg.match(chr.MATCH_URL)[1]; data[ord] = val; ord++;
}
}
catch (e) {
}
}
return decodeURIComponent(data.join(""));
};
chr.escapeHTML = function(s) {
return s.replace(/([<>&""''])/g, function(m, c) {
switch (c) {
case "<": return "<";
case ">": return ">";
case "&": return "&";
case '"': return """;
case "'": return "'";
}
return c;
});
};
})();