127 lines
3.1 KiB
JavaScript
127 lines
3.1 KiB
JavaScript
'use strict';
|
|
|
|
const version = require('./version.cjs');
|
|
const syntax = require('./syntax.cjs');
|
|
const utils = require('./utils.cjs');
|
|
|
|
const { parse, generate, compress } = syntax;
|
|
|
|
function debugOutput(name, options, startTime, data) {
|
|
if (options.debug) {
|
|
console.error(`## ${name} done in %d ms\n`, Date.now() - startTime);
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
function createDefaultLogger(level) {
|
|
let lastDebug;
|
|
|
|
return function logger(title, ast) {
|
|
let line = title;
|
|
|
|
if (ast) {
|
|
line = `[${((Date.now() - lastDebug) / 1000).toFixed(3)}s] ${line}`;
|
|
}
|
|
|
|
if (level > 1 && ast) {
|
|
let css = generate(ast);
|
|
|
|
// when level 2, limit css to 256 symbols
|
|
if (level === 2 && css.length > 256) {
|
|
css = css.substr(0, 256) + '...';
|
|
}
|
|
|
|
line += `\n ${css}\n`;
|
|
}
|
|
|
|
console.error(line);
|
|
lastDebug = Date.now();
|
|
};
|
|
}
|
|
|
|
function buildCompressOptions(options) {
|
|
options = { ...options };
|
|
|
|
if (typeof options.logger !== 'function' && options.debug) {
|
|
options.logger = createDefaultLogger(options.debug);
|
|
}
|
|
|
|
return options;
|
|
}
|
|
|
|
function runHandler(ast, options, handlers) {
|
|
if (!Array.isArray(handlers)) {
|
|
handlers = [handlers];
|
|
}
|
|
|
|
handlers.forEach(fn => fn(ast, options));
|
|
}
|
|
|
|
function minify(context, source, options) {
|
|
options = options || {};
|
|
|
|
const filename = options.filename || '<unknown>';
|
|
let result;
|
|
|
|
// parse
|
|
const ast = debugOutput('parsing', options, Date.now(),
|
|
parse(source, {
|
|
context,
|
|
filename,
|
|
positions: Boolean(options.sourceMap)
|
|
})
|
|
);
|
|
|
|
// before compress handlers
|
|
if (options.beforeCompress) {
|
|
debugOutput('beforeCompress', options, Date.now(),
|
|
runHandler(ast, options, options.beforeCompress)
|
|
);
|
|
}
|
|
|
|
// compress
|
|
const compressResult = debugOutput('compress', options, Date.now(),
|
|
compress(ast, buildCompressOptions(options))
|
|
);
|
|
|
|
// after compress handlers
|
|
if (options.afterCompress) {
|
|
debugOutput('afterCompress', options, Date.now(),
|
|
runHandler(compressResult, options, options.afterCompress)
|
|
);
|
|
}
|
|
|
|
// generate
|
|
if (options.sourceMap) {
|
|
result = debugOutput('generate(sourceMap: true)', options, Date.now(), (() => {
|
|
const tmp = generate(compressResult.ast, { sourceMap: true });
|
|
|
|
tmp.map._file = filename; // since other tools can relay on file in source map transform chain
|
|
tmp.map.setSourceContent(filename, source);
|
|
|
|
return tmp;
|
|
})());
|
|
} else {
|
|
result = debugOutput('generate', options, Date.now(), {
|
|
css: generate(compressResult.ast),
|
|
map: null
|
|
});
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
function minifyStylesheet(source, options) {
|
|
return minify('stylesheet', source, options);
|
|
}
|
|
|
|
function minifyBlock(source, options) {
|
|
return minify('declarationList', source, options);
|
|
}
|
|
|
|
exports.version = version.version;
|
|
exports.syntax = syntax;
|
|
exports.utils = utils;
|
|
exports.minify = minifyStylesheet;
|
|
exports.minifyBlock = minifyBlock;
|