forked from sandywu/codepainter
/
codepainter.js
66 lines (54 loc) · 1.73 KB
/
codepainter.js
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const Pipe = require('./lib/Pipe'),
rules = require('./lib/rules'),
Serializer = require('./lib/Serializer'),
Tokenizer = require('./lib/Tokenizer');
module.exports.infer = function (sample, callback) {
var left = rules.length,
style = {},
tokenizer = new Tokenizer();
sample.pipe(tokenizer);
if (rules.length > 0) {
var left = rules.length;
rules.forEach(function (rule) {
rule.infer(tokenizer, function (error, value) {
style[rule.name] = value;
left--;
if (left === 0)
callback(null, style);
});
});
} else {
callback(null, style);
}
sample.resume();
};
module.exports.transform = function (input, style, output, callback) {
var enabledRules = [],
left = rules.length,
tokenizer = new Tokenizer(),
serializer = new Serializer(),
streams = [];
rules.forEach(function (rule) {
if (typeof style[rule.name] !== 'undefined' && style[rule.name] !== null)
enabledRules.push(rule);
});
input.pipe(tokenizer);
serializer.pipe(output);
if (enabledRules.length > 0) {
var streams = [];
streams.push(tokenizer);
for (var i = 0; i < enabledRules.length - 1; i++)
streams.push(new Pipe());
streams.push(serializer);
for (var i = 0; i < enabledRules.length; i++) {
var rule = enabledRules[i];
rule.transform(streams[i], style[rule.name], streams[i + 1], function (error) { });
};
} else {
tokenizer.pipe(serializer);
}
serializer.on('end', function () {
callback(null);
});
input.resume();
};