Shuo/client/js/libs/handlebars/parse.js

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Handlebars.registerHelper(
"parse", function(text) {
var wrap = wraplong(text);
text = escape(text);
text = colors(text);
text = uri(text);
if (wrap) {
return "<i class='wrap'>" + text + "</i>";
} else {
return text;
}
}
);
function wraplong(text) {
var wrap = false;
var split = text.split(" ");
for (var i in split) {
if (split[i].length > 40) {
wrap = true;
}
}
return wrap;
}
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function escape(text) {
var e = {
"<": "&lt;",
">": "&gt;",
"'": "&#39;"
};
return text.replace(/[<>']/g, function (c) {
return e[c];
});
}
function uri(text) {
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return URI.withinString(text, function(url, start, end, source) {
if (url.indexOf("javascript:") === 0) {
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return url;
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}
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var split = url.split("<");
url = "<a href='" + split[0].replace(/^www/, "//www") + "' target='_blank'>" + split[0] + "</a>";
if (split.length > 1) {
url += "<" + split.slice(1).join("<");
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}
return url;
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});
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}
/**
* MIRC compliant colour and style parser
* Unfortuanately this is a non trivial operation
* See this branch for source and tests
* https://github.com/megawac/irc-style-parser/tree/shout
*/
var styleCheck_Re = /[\x00-\x1F]/,
back_re = /^(\d{1,2})(,(\d{1,2}))?/,
colourKey = "\x03", colour_re = /\x03/g,
// breaks all open styles ^O (\x0F)
styleBreak = "\x0F";
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function styleTemplate(settings) {
return "<span class='" + settings.style + "'>" + settings.text + "</span>";
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}
var styles = [
["normal", "\x00", ""], ["underline", "\x1F"],
["bold", "\x02"], ["italic", "\x1D"]
].map(function(style) {
var escaped = encodeURI(style[1]).replace("%", "\\x");
return {
name: style[0],
style: style[2] != null ? style[2] : "irc-" + style[0],
key: style[1],
keyregex: new RegExp(escaped + "(.*?)(" + escaped + "|$)")
};
});
//http://www.mirc.com/colors.html
var colourMap = {};
for (var colour = 0; colour < 16; colour++) {
colourMap[colour] = {
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fore: "irc-fg" + colour,
back: "irc-bg" + colour
};
}
function colors(line) {
// http://www.mirc.com/colors.html
// http://www.aviran.org/stripremove-irc-client-control-characters/
// https://github.com/perl6/mu/blob/master/examples/rules/Grammar-IRC.pm
// regexs are cruel to parse this thing
// already done?
if (!styleCheck_Re.test(line)) return line;
// split up by the irc style break character ^O
if (line.indexOf(styleBreak) >= 0) {
return line.split(styleBreak).map(colors).join("");
}
var result = line;
var parseArr = result.split(colourKey);
var text, match, colour, background = "";
for (var i = 0; i < parseArr.length; i++) {
text = parseArr[i];
match = text.match(back_re);
colour = match && colourMap[+match[1]];
if (!match || !colour) {
// ^C (no colour) ending. Escape current colour and carry on
background = "";
continue;
}
// set the background colour
// we don't overide the background local var to support nesting
if (colourMap[+match[3]]) {
background = " " + colourMap[+match[3]].back;
}
// update the parsed text result
result = result.replace(colourKey + text, styleTemplate({
style: colour.fore + background,
text: text.slice(match[0].length)
}));
}
// Matching styles (italics/bold/underline)
// if only colours were this easy...
styles.forEach(function(style) {
if (result.indexOf(style.key) < 0) return;
result = result.replace(style.keyregex, function(match, text) {
return styleTemplate({
"style": style.style,
"text": text
});
});
});
//replace the reminent colour terminations and be done with it
return result.replace(colour_re, "");
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}