mirror of https://github.com/jkjoy/sunpeiwen.git
86 lines
2.1 KiB
JavaScript
86 lines
2.1 KiB
JavaScript
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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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, nodes = require('../nodes')
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, parse = require('url').parse
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, relative = require('path').relative
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, join = require('path').join
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, dirname = require('path').dirname
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, extname = require('path').extname
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, sep = require('path').sep;
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/**
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* Return a url() function which resolves urls.
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*
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* Options:
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*
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* - `paths` resolution path(s), merged with general lookup paths
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* - `nocheck` don't check file existence
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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.resolver({ nocheck: true }))
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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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function resolver(url) {
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// Compile the url
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var compiler = new Compiler(url)
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, filename = url.filename;
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compiler.isURL = true;
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url = parse(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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var literal = new nodes.Literal('url("' + url.href + '")')
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, path = url.pathname
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, dest = this.options.dest
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, tail = ''
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, res;
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// Absolute or hash
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if (url.protocol || !path || '/' == path[0]) return literal;
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// Check that file exists
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if (!options.nocheck) {
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var _paths = options.paths || [];
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path = require('../utils').lookup(path, _paths.concat(this.paths));
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if (!path) return literal;
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}
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if (this.includeCSS && extname(path) == '.css')
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return new nodes.Literal(url.href);
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if (url.search) tail += url.search;
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if (url.hash) tail += url.hash;
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if (dest && extname(dest) == '.css')
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dest = dirname(dest);
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res = relative(dest || dirname(this.filename), options.nocheck
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? join(dirname(filename), path)
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: path) + tail;
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if ('\\' == sep) res = res.replace(/\\/g, '/');
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return new nodes.Literal('url("' + res + '")');
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};
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// Expose options to Evaluator
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resolver.options = options;
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resolver.raw = true;
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return resolver;
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};
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