143 lines
3.3 KiB
JavaScript
143 lines
3.3 KiB
JavaScript
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/*!
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* Stylus - plugin - url
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* Copyright (c) Automattic <developer.wordpress.com>
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* MIT Licensed
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*/
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/**
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* Module dependencies.
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*/
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var Compiler = require('../visitor/compiler')
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, events = require('../renderer').events
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, nodes = require('../nodes')
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, parse = require('url').parse
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, extname = require('path').extname
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, utils = require('../utils')
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, fs = require('fs');
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/**
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* Mime table.
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*/
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var defaultMimes = {
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'.gif': 'image/gif'
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, '.png': 'image/png'
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, '.jpg': 'image/jpeg'
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, '.jpeg': 'image/jpeg'
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, '.svg': 'image/svg+xml'
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, '.webp': 'image/webp'
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, '.ttf': 'application/x-font-ttf'
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, '.eot': 'application/vnd.ms-fontobject'
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, '.woff': 'application/font-woff'
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, '.woff2': 'application/font-woff2'
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};
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/**
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* Supported encoding types
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*/
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var encodingTypes = {
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BASE_64: 'base64',
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UTF8: 'charset=utf-8'
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}
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/**
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* Return a url() function with the given `options`.
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*
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* Options:
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*
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* - `limit` bytesize limit defaulting to 30Kb
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* - `paths` image resolution path(s), merged with general lookup paths
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*
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* Examples:
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*
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* stylus(str)
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* .set('filename', __dirname + '/css/test.styl')
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* .define('url', stylus.url({ paths: [__dirname + '/public'] }))
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* .render(function(err, css){ ... })
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*
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* @param {Object} options
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* @return {Function}
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* @api public
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*/
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module.exports = function(options) {
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options = options || {};
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var _paths = options.paths || [];
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var sizeLimit = null != options.limit ? options.limit : 30000;
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var mimes = options.mimes || defaultMimes;
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/**
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* @param {object} url - The path to the image you want to encode.
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* @param {object} enc - The encoding for the image. Defaults to base64, the
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* other valid option is `utf8`.
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*/
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function fn(url, enc){
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// Compile the url
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var compiler = new Compiler(url)
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, encoding = encodingTypes.BASE_64;
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compiler.isURL = true;
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url = url.nodes.map(function(node){
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return compiler.visit(node);
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}).join('');
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// Parse literal
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url = parse(url);
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var ext = extname(url.pathname)
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, mime = mimes[ext]
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, hash = url.hash || ''
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, literal = new nodes.Literal('url("' + url.href + '")')
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, paths = _paths.concat(this.paths)
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, buf
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, result;
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// Not supported
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if (!mime) return literal;
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// Absolute
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if (url.protocol) return literal;
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// Lookup
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var found = utils.lookup(url.pathname, paths);
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// Failed to lookup
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if (!found) {
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events.emit(
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'file not found'
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, 'File ' + literal + ' could not be found, literal url retained!'
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);
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return literal;
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}
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// Read data
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buf = fs.readFileSync(found);
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// Too large
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if (false !== sizeLimit && buf.length > sizeLimit) return literal;
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if (enc && 'utf8' == enc.first.val.toLowerCase()) {
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encoding = encodingTypes.UTF8;
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result = buf.toString('utf8').replace(/\s+/g, ' ')
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.replace(/[{}\|\\\^~\[\]`"<>#%]/g, function(match) {
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return '%' + match[0].charCodeAt(0).toString(16).toUpperCase();
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}).trim();
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} else {
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result = buf.toString(encoding) + hash;
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}
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// Encode
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return new nodes.Literal('url("data:' + mime + ';' + encoding + ',' + result + '")');
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};
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fn.raw = true;
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return fn;
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};
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// Exporting default mimes so we could easily access them
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module.exports.mimes = defaultMimes;
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