From 6f990c9ce4fe716b2ca9d136c65de9fad46bc7bb Mon Sep 17 00:00:00 2001 From: Gabriel Hurley Date: Fri, 12 Oct 2012 15:35:19 -0700 Subject: [PATCH] Readding bin dir which was mistakenly deleted. Change-Id: Ia8989da47a55f7c932115a976b6d799714b8dc56 --- bin/less/lessc | 139 ++++ bin/lib/less/browser.js | 380 +++++++++ bin/lib/less/colors.js | 152 ++++ bin/lib/less/cssmin.js | 355 ++++++++ bin/lib/less/functions.js | 228 ++++++ bin/lib/less/index.js | 148 ++++ bin/lib/less/parser.js | 1334 +++++++++++++++++++++++++++++++ bin/lib/less/rhino.js | 62 ++ bin/lib/less/tree.js | 17 + bin/lib/less/tree/alpha.js | 17 + bin/lib/less/tree/anonymous.js | 13 + bin/lib/less/tree/assignment.js | 17 + bin/lib/less/tree/call.js | 48 ++ bin/lib/less/tree/color.js | 101 +++ bin/lib/less/tree/comment.js | 14 + bin/lib/less/tree/condition.js | 42 + bin/lib/less/tree/dimension.js | 49 ++ bin/lib/less/tree/directive.js | 35 + bin/lib/less/tree/element.js | 52 ++ bin/lib/less/tree/expression.js | 23 + bin/lib/less/tree/import.js | 83 ++ bin/lib/less/tree/javascript.js | 51 ++ bin/lib/less/tree/keyword.js | 19 + bin/lib/less/tree/media.js | 114 +++ bin/lib/less/tree/mixin.js | 146 ++++ bin/lib/less/tree/operation.js | 32 + bin/lib/less/tree/paren.js | 16 + bin/lib/less/tree/quoted.js | 29 + bin/lib/less/tree/rule.js | 42 + bin/lib/less/tree/ruleset.js | 225 ++++++ bin/lib/less/tree/selector.js | 42 + bin/lib/less/tree/url.js | 25 + bin/lib/less/tree/value.js | 24 + bin/lib/less/tree/variable.js | 26 + 34 files changed, 4100 insertions(+) create mode 100755 bin/less/lessc create mode 100644 bin/lib/less/browser.js create mode 100644 bin/lib/less/colors.js create mode 100644 bin/lib/less/cssmin.js create mode 100644 bin/lib/less/functions.js create mode 100644 bin/lib/less/index.js create mode 100644 bin/lib/less/parser.js create mode 100644 bin/lib/less/rhino.js create mode 100644 bin/lib/less/tree.js create mode 100644 bin/lib/less/tree/alpha.js create mode 100644 bin/lib/less/tree/anonymous.js create mode 100644 bin/lib/less/tree/assignment.js create mode 100644 bin/lib/less/tree/call.js create mode 100644 bin/lib/less/tree/color.js create mode 100644 bin/lib/less/tree/comment.js create mode 100644 bin/lib/less/tree/condition.js create mode 100644 bin/lib/less/tree/dimension.js create mode 100644 bin/lib/less/tree/directive.js create mode 100644 bin/lib/less/tree/element.js create mode 100644 bin/lib/less/tree/expression.js create mode 100644 bin/lib/less/tree/import.js create mode 100644 bin/lib/less/tree/javascript.js create mode 100644 bin/lib/less/tree/keyword.js create mode 100644 bin/lib/less/tree/media.js create mode 100644 bin/lib/less/tree/mixin.js create mode 100644 bin/lib/less/tree/operation.js create mode 100644 bin/lib/less/tree/paren.js create mode 100644 bin/lib/less/tree/quoted.js create mode 100644 bin/lib/less/tree/rule.js create mode 100644 bin/lib/less/tree/ruleset.js create mode 100644 bin/lib/less/tree/selector.js create mode 100644 bin/lib/less/tree/url.js create mode 100644 bin/lib/less/tree/value.js create mode 100644 bin/lib/less/tree/variable.js diff --git a/bin/less/lessc b/bin/less/lessc new file mode 100755 index 0000000000..30ae35208b --- /dev/null +++ b/bin/less/lessc @@ -0,0 +1,139 @@ +#!/usr/bin/env node + +var path = require('path'), + fs = require('fs'), + sys = require('util'), + os = require('os'); + +var less = require('../lib/less'); +var args = process.argv.slice(1); +var options = { + compress: false, + yuicompress: false, + optimization: 1, + silent: false, + paths: [], + color: true, + strictImports: false +}; + +args = args.filter(function (arg) { + var match; + + if (match = arg.match(/^-I(.+)$/)) { + options.paths.push(match[1]); + return false; + } + + if (match = arg.match(/^--?([a-z][0-9a-z-]*)(?:=([^\s]+))?$/i)) { arg = match[1] } + else { return arg } + + switch (arg) { + case 'v': + case 'version': + sys.puts("lessc " + less.version.join('.') + " (LESS Compiler) [JavaScript]"); + process.exit(0); + case 'verbose': + options.verbose = true; + break; + case 's': + case 'silent': + options.silent = true; + break; + case 'strict-imports': + options.strictImports = true; + break; + case 'h': + case 'help': + sys.puts("usage: lessc source [destination]"); + process.exit(0); + case 'x': + case 'compress': + options.compress = true; + break; + case 'yui-compress': + options.yuicompress = true; + break; + case 'no-color': + options.color = false; + break; + case 'include-path': + options.paths = match[2].split(os.type().match(/Windows/) ? ';' : ':') + .map(function(p) { + if (p) { + return path.resolve(process.cwd(), p); + } + }); + break; + case 'O0': options.optimization = 0; break; + case 'O1': options.optimization = 1; break; + case 'O2': options.optimization = 2; break; + } +}); + +var input = args[1]; +if (input && input != '-') { + input = path.resolve(process.cwd(), input); +} +var output = args[2]; +if (output) { + output = path.resolve(process.cwd(), output); +} + +var css, fd, tree; + +if (! input) { + sys.puts("lessc: no input files"); + process.exit(1); +} + +var parseLessFile = function (e, data) { + if (e) { + sys.puts("lessc: " + e.message); + process.exit(1); + } + + new(less.Parser)({ + paths: [path.dirname(input)].concat(options.paths), + optimization: options.optimization, + filename: input, + strictImports: options.strictImports + }).parse(data, function (err, tree) { + if (err) { + less.writeError(err, options); + process.exit(1); + } else { + try { + css = tree.toCSS({ + compress: options.compress, + yuicompress: options.yuicompress + }); + if (output) { + fd = fs.openSync(output, "w"); + fs.writeSync(fd, css, 0, "utf8"); + } else { + sys.print(css); + } + } catch (e) { + less.writeError(e, options); + process.exit(2); + } + } + }); +}; + +if (input != '-') { + fs.readFile(input, 'utf-8', parseLessFile); +} else { + process.stdin.resume(); + process.stdin.setEncoding('utf8'); + + var buffer = ''; + process.stdin.on('data', function(data) { + buffer += data; + }); + + process.stdin.on('end', function() { + parseLessFile(false, buffer); + }); +} diff --git a/bin/lib/less/browser.js b/bin/lib/less/browser.js new file mode 100644 index 0000000000..cab913be0c --- /dev/null +++ b/bin/lib/less/browser.js @@ -0,0 +1,380 @@ +// +// browser.js - client-side engine +// + +var isFileProtocol = (location.protocol === 'file:' || + location.protocol === 'chrome:' || + location.protocol === 'chrome-extension:' || + location.protocol === 'resource:'); + +less.env = less.env || (location.hostname == '127.0.0.1' || + location.hostname == '0.0.0.0' || + location.hostname == 'localhost' || + location.port.length > 0 || + isFileProtocol ? 'development' + : 'production'); + +// Load styles asynchronously (default: false) +// +// This is set to `false` by default, so that the body +// doesn't start loading before the stylesheets are parsed. +// Setting this to `true` can result in flickering. +// +less.async = false; + +// Interval between watch polls +less.poll = less.poll || (isFileProtocol ? 1000 : 1500); + +// +// Watch mode +// +less.watch = function () { return this.watchMode = true }; +less.unwatch = function () { return this.watchMode = false }; + +if (less.env === 'development') { + less.optimization = 0; + + if (/!watch/.test(location.hash)) { + less.watch(); + } + less.watchTimer = setInterval(function () { + if (less.watchMode) { + loadStyleSheets(function (e, root, _, sheet, env) { + if (root) { + createCSS(root.toCSS(), sheet, env.lastModified); + } + }); + } + }, less.poll); +} else { + less.optimization = 3; +} + +var cache; + +try { + cache = (typeof(window.localStorage) === 'undefined') ? null : window.localStorage; +} catch (_) { + cache = null; +} + +// +// Get all tags with the 'rel' attribute set to "stylesheet/less" +// +var links = document.getElementsByTagName('link'); +var typePattern = /^text\/(x-)?less$/; + +less.sheets = []; + +for (var i = 0; i < links.length; i++) { + if (links[i].rel === 'stylesheet/less' || (links[i].rel.match(/stylesheet/) && + (links[i].type.match(typePattern)))) { + less.sheets.push(links[i]); + } +} + + +less.refresh = function (reload) { + var startTime, endTime; + startTime = endTime = new(Date); + + loadStyleSheets(function (e, root, _, sheet, env) { + if (env.local) { + log("loading " + sheet.href + " from cache."); + } else { + log("parsed " + sheet.href + " successfully."); + createCSS(root.toCSS(), sheet, env.lastModified); + } + log("css for " + sheet.href + " generated in " + (new(Date) - endTime) + 'ms'); + (env.remaining === 0) && log("css generated in " + (new(Date) - startTime) + 'ms'); + endTime = new(Date); + }, reload); + + loadStyles(); +}; +less.refreshStyles = loadStyles; + +less.refresh(less.env === 'development'); + +function loadStyles() { + var styles = document.getElementsByTagName('style'); + for (var i = 0; i < styles.length; i++) { + if (styles[i].type.match(typePattern)) { + new(less.Parser)().parse(styles[i].innerHTML || '', function (e, tree) { + var css = tree.toCSS(); + var style = styles[i]; + style.type = 'text/css'; + if (style.styleSheet) { + style.styleSheet.cssText = css; + } else { + style.innerHTML = css; + } + }); + } + } +} + +function loadStyleSheets(callback, reload) { + for (var i = 0; i < less.sheets.length; i++) { + loadStyleSheet(less.sheets[i], callback, reload, less.sheets.length - (i + 1)); + } +} + +function loadStyleSheet(sheet, callback, reload, remaining) { + var url = window.location.href.replace(/[#?].*$/, ''); + var href = sheet.href.replace(/\?.*$/, ''); + var css = cache && cache.getItem(href); + var timestamp = cache && cache.getItem(href + ':timestamp'); + var styles = { css: css, timestamp: timestamp }; + + // Stylesheets in IE don't always return the full path + if (! /^(https?|file):/.test(href)) { + if (href.charAt(0) == "/") { + href = window.location.protocol + "//" + window.location.host + href; + } else { + href = url.slice(0, url.lastIndexOf('/') + 1) + href; + } + } + var filename = href.match(/([^\/]+)$/)[1]; + + xhr(sheet.href, sheet.type, function (data, lastModified) { + if (!reload && styles && lastModified && + (new(Date)(lastModified).valueOf() === + new(Date)(styles.timestamp).valueOf())) { + // Use local copy + createCSS(styles.css, sheet); + callback(null, null, data, sheet, { local: true, remaining: remaining }); + } else { + // Use remote copy (re-parse) + try { + new(less.Parser)({ + optimization: less.optimization, + paths: [href.replace(/[\w\.-]+$/, '')], + mime: sheet.type, + filename: filename + }).parse(data, function (e, root) { + if (e) { return error(e, href) } + try { + callback(e, root, data, sheet, { local: false, lastModified: lastModified, remaining: remaining }); + removeNode(document.getElementById('less-error-message:' + extractId(href))); + } catch (e) { + error(e, href); + } + }); + } catch (e) { + error(e, href); + } + } + }, function (status, url) { + throw new(Error)("Couldn't load " + url + " (" + status + ")"); + }); +} + +function extractId(href) { + return href.replace(/^[a-z]+:\/\/?[^\/]+/, '' ) // Remove protocol & domain + .replace(/^\//, '' ) // Remove root / + .replace(/\?.*$/, '' ) // Remove query + .replace(/\.[^\.\/]+$/, '' ) // Remove file extension + .replace(/[^\.\w-]+/g, '-') // Replace illegal characters + .replace(/\./g, ':'); // Replace dots with colons(for valid id) +} + +function createCSS(styles, sheet, lastModified) { + var css; + + // Strip the query-string + var href = sheet.href ? sheet.href.replace(/\?.*$/, '') : ''; + + // If there is no title set, use the filename, minus the extension + var id = 'less:' + (sheet.title || extractId(href)); + + // If the stylesheet doesn't exist, create a new node + if ((css = document.getElementById(id)) === null) { + css = document.createElement('style'); + css.type = 'text/css'; + css.media = sheet.media || 'screen'; + css.id = id; + document.getElementsByTagName('head')[0].appendChild(css); + } + + if (css.styleSheet) { // IE + try { + css.styleSheet.cssText = styles; + } catch (e) { + throw new(Error)("Couldn't reassign styleSheet.cssText."); + } + } else { + (function (node) { + if (css.childNodes.length > 0) { + if (css.firstChild.nodeValue !== node.nodeValue) { + css.replaceChild(node, css.firstChild); + } + } else { + css.appendChild(node); + } + })(document.createTextNode(styles)); + } + + // Don't update the local store if the file wasn't modified + if (lastModified && cache) { + log('saving ' + href + ' to cache.'); + cache.setItem(href, styles); + cache.setItem(href + ':timestamp', lastModified); + } +} + +function xhr(url, type, callback, errback) { + var xhr = getXMLHttpRequest(); + var async = isFileProtocol ? false : less.async; + + if (typeof(xhr.overrideMimeType) === 'function') { + xhr.overrideMimeType('text/css'); + } + xhr.open('GET', url, async); + xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5'); + xhr.send(null); + + if (isFileProtocol) { + if (xhr.status === 0 || (xhr.status >= 200 && xhr.status < 300)) { + callback(xhr.responseText); + } else { + errback(xhr.status, url); + } + } else if (async) { + xhr.onreadystatechange = function () { + if (xhr.readyState == 4) { + handleResponse(xhr, callback, errback); + } + }; + } else { + handleResponse(xhr, callback, errback); + } + + function handleResponse(xhr, callback, errback) { + if (xhr.status >= 200 && xhr.status < 300) { + callback(xhr.responseText, + xhr.getResponseHeader("Last-Modified")); + } else if (typeof(errback) === 'function') { + errback(xhr.status, url); + } + } +} + +function getXMLHttpRequest() { + if (window.XMLHttpRequest) { + return new(XMLHttpRequest); + } else { + try { + return new(ActiveXObject)("MSXML2.XMLHTTP.3.0"); + } catch (e) { + log("browser doesn't support AJAX."); + return null; + } + } +} + +function removeNode(node) { + return node && node.parentNode.removeChild(node); +} + +function log(str) { + if (less.env == 'development' && typeof(console) !== "undefined") { console.log('less: ' + str) } +} + +function error(e, href) { + var id = 'less-error-message:' + extractId(href); + var template = '
  • {content}
    • '; + var elem = document.createElement('div'), timer, content, error = []; + var filename = e.filename || href; + + elem.id = id; + elem.className = "less-error-message"; + + content = '

    ' + (e.message || 'There is an error in your .less file') + + '

    ' + '

    in ' + filename + " "; + + var errorline = function (e, i, classname) { + if (e.extract[i]) { + error.push(template.replace(/\{line\}/, parseInt(e.line) + (i - 1)) + .replace(/\{class\}/, classname) + .replace(/\{content\}/, e.extract[i])); + } + }; + + if (e.stack) { + content += '
    ' + e.stack.split('\n').slice(1).join('
    '); + } else if (e.extract) { + errorline(e, 0, ''); + errorline(e, 1, 'line'); + errorline(e, 2, ''); + content += 'on line ' + e.line + ', column ' + (e.column + 1) + ':

    ' + + ''; + } + elem.innerHTML = content; + + // CSS for error messages + createCSS([ + '.less-error-message ul, .less-error-message li {', + 'list-style-type: none;', + 'margin-right: 15px;', + 'padding: 4px 0;', + 'margin: 0;', + '}', + '.less-error-message label {', + 'font-size: 12px;', + 'margin-right: 15px;', + 'padding: 4px 0;', + 'color: #cc7777;', + '}', + '.less-error-message pre {', + 'color: #dd6666;', + 'padding: 4px 0;', + 'margin: 0;', + 'display: inline-block;', + '}', + '.less-error-message pre.line {', + 'color: #ff0000;', + '}', + '.less-error-message h3 {', + 'font-size: 20px;', + 'font-weight: bold;', + 'padding: 15px 0 5px 0;', + 'margin: 0;', + '}', + '.less-error-message a {', + 'color: #10a', + '}', + '.less-error-message .error {', + 'color: red;', + 'font-weight: bold;', + 'padding-bottom: 2px;', + 'border-bottom: 1px dashed red;', + '}' + ].join('\n'), { title: 'error-message' }); + + elem.style.cssText = [ + "font-family: Arial, sans-serif", + "border: 1px solid #e00", + "background-color: #eee", + "border-radius: 5px", + "-webkit-border-radius: 5px", + "-moz-border-radius: 5px", + "color: #e00", + "padding: 15px", + "margin-bottom: 15px" + ].join(';'); + + if (less.env == 'development') { + timer = setInterval(function () { + if (document.body) { + if (document.getElementById(id)) { + document.body.replaceChild(elem, document.getElementById(id)); + } else { + document.body.insertBefore(elem, document.body.firstChild); + } + clearInterval(timer); + } + }, 10); + } +} + diff --git a/bin/lib/less/colors.js b/bin/lib/less/colors.js new file mode 100644 index 0000000000..ed4c2838be --- /dev/null +++ b/bin/lib/less/colors.js @@ -0,0 +1,152 @@ +(function (tree) { + tree.colors = { + 'aliceblue':'#f0f8ff', + 'antiquewhite':'#faebd7', + 'aqua':'#00ffff', + 'aquamarine':'#7fffd4', + 'azure':'#f0ffff', + 'beige':'#f5f5dc', + 'bisque':'#ffe4c4', + 'black':'#000000', + 'blanchedalmond':'#ffebcd', + 'blue':'#0000ff', + 'blueviolet':'#8a2be2', + 'brown':'#a52a2a', + 'burlywood':'#deb887', + 'cadetblue':'#5f9ea0', + 'chartreuse':'#7fff00', + 'chocolate':'#d2691e', + 'coral':'#ff7f50', + 'cornflowerblue':'#6495ed', + 'cornsilk':'#fff8dc', + 'crimson':'#dc143c', + 'cyan':'#00ffff', + 'darkblue':'#00008b', + 'darkcyan':'#008b8b', + 'darkgoldenrod':'#b8860b', + 'darkgray':'#a9a9a9', + 'darkgrey':'#a9a9a9', + 'darkgreen':'#006400', + 'darkkhaki':'#bdb76b', + 'darkmagenta':'#8b008b', + 'darkolivegreen':'#556b2f', + 'darkorange':'#ff8c00', + 'darkorchid':'#9932cc', + 'darkred':'#8b0000', + 'darksalmon':'#e9967a', + 'darkseagreen':'#8fbc8f', + 'darkslateblue':'#483d8b', + 'darkslategray':'#2f4f4f', + 'darkslategrey':'#2f4f4f', + 'darkturquoise':'#00ced1', + 'darkviolet':'#9400d3', + 'deeppink':'#ff1493', + 'deepskyblue':'#00bfff', + 'dimgray':'#696969', + 'dimgrey':'#696969', + 'dodgerblue':'#1e90ff', + 'firebrick':'#b22222', + 'floralwhite':'#fffaf0', + 'forestgreen':'#228b22', + 'fuchsia':'#ff00ff', + 'gainsboro':'#dcdcdc', + 'ghostwhite':'#f8f8ff', + 'gold':'#ffd700', + 'goldenrod':'#daa520', + 'gray':'#808080', + 'grey':'#808080', + 'green':'#008000', + 'greenyellow':'#adff2f', + 'honeydew':'#f0fff0', + 'hotpink':'#ff69b4', + 'indianred':'#cd5c5c', + 'indigo':'#4b0082', + 'ivory':'#fffff0', + 'khaki':'#f0e68c', + 'lavender':'#e6e6fa', + 'lavenderblush':'#fff0f5', + 'lawngreen':'#7cfc00', + 'lemonchiffon':'#fffacd', + 'lightblue':'#add8e6', + 'lightcoral':'#f08080', + 'lightcyan':'#e0ffff', + 'lightgoldenrodyellow':'#fafad2', + 'lightgray':'#d3d3d3', + 'lightgrey':'#d3d3d3', + 'lightgreen':'#90ee90', + 'lightpink':'#ffb6c1', + 'lightsalmon':'#ffa07a', + 'lightseagreen':'#20b2aa', + 'lightskyblue':'#87cefa', + 'lightslategray':'#778899', + 'lightslategrey':'#778899', + 'lightsteelblue':'#b0c4de', + 'lightyellow':'#ffffe0', + 'lime':'#00ff00', + 'limegreen':'#32cd32', + 'linen':'#faf0e6', + 'magenta':'#ff00ff', + 'maroon':'#800000', + 'mediumaquamarine':'#66cdaa', + 'mediumblue':'#0000cd', + 'mediumorchid':'#ba55d3', + 'mediumpurple':'#9370d8', + 'mediumseagreen':'#3cb371', + 'mediumslateblue':'#7b68ee', + 'mediumspringgreen':'#00fa9a', + 'mediumturquoise':'#48d1cc', + 'mediumvioletred':'#c71585', + 'midnightblue':'#191970', + 'mintcream':'#f5fffa', + 'mistyrose':'#ffe4e1', + 'moccasin':'#ffe4b5', + 'navajowhite':'#ffdead', + 'navy':'#000080', + 'oldlace':'#fdf5e6', + 'olive':'#808000', + 'olivedrab':'#6b8e23', + 'orange':'#ffa500', + 'orangered':'#ff4500', + 'orchid':'#da70d6', + 'palegoldenrod':'#eee8aa', + 'palegreen':'#98fb98', + 'paleturquoise':'#afeeee', + 'palevioletred':'#d87093', + 'papayawhip':'#ffefd5', + 'peachpuff':'#ffdab9', + 'peru':'#cd853f', + 'pink':'#ffc0cb', + 'plum':'#dda0dd', + 'powderblue':'#b0e0e6', + 'purple':'#800080', + 'red':'#ff0000', + 'rosybrown':'#bc8f8f', + 'royalblue':'#4169e1', + 'saddlebrown':'#8b4513', + 'salmon':'#fa8072', + 'sandybrown':'#f4a460', + 'seagreen':'#2e8b57', + 'seashell':'#fff5ee', + 'sienna':'#a0522d', + 'silver':'#c0c0c0', + 'skyblue':'#87ceeb', + 'slateblue':'#6a5acd', + 'slategray':'#708090', + 'slategrey':'#708090', + 'snow':'#fffafa', + 'springgreen':'#00ff7f', + 'steelblue':'#4682b4', + 'tan':'#d2b48c', + 'teal':'#008080', + 'thistle':'#d8bfd8', + 'tomato':'#ff6347', + 'transparent':'rgba(0,0,0,0)', + 'turquoise':'#40e0d0', + 'violet':'#ee82ee', + 'wheat':'#f5deb3', + 'white':'#ffffff', + 'whitesmoke':'#f5f5f5', + 'yellow':'#ffff00', + 'yellowgreen':'#9acd32' + }; +})(require('./tree')); diff --git a/bin/lib/less/cssmin.js b/bin/lib/less/cssmin.js new file mode 100644 index 0000000000..427de71c06 --- /dev/null +++ b/bin/lib/less/cssmin.js @@ -0,0 +1,355 @@ +/** + * cssmin.js + * Author: Stoyan Stefanov - http://phpied.com/ + * This is a JavaScript port of the CSS minification tool + * distributed with YUICompressor, itself a port + * of the cssmin utility by Isaac Schlueter - http://foohack.com/ + * Permission is hereby granted to use the JavaScript version under the same + * conditions as the YUICompressor (original YUICompressor note below). + */ + +/* +* YUI Compressor +* http://developer.yahoo.com/yui/compressor/ +* Author: Julien Lecomte - http://www.julienlecomte.net/ +* Copyright (c) 2011 Yahoo! Inc. All rights reserved. +* The copyrights embodied in the content of this file are licensed +* by Yahoo! Inc. under the BSD (revised) open source license. +*/ +var YAHOO = YAHOO || {}; +YAHOO.compressor = YAHOO.compressor || {}; + +/** + * Utility method to replace all data urls with tokens before we start + * compressing, to avoid performance issues running some of the subsequent + * regexes against large strings chunks. + * + * @private + * @method _extractDataUrls + * @param {String} css The input css + * @param {Array} The global array of tokens to preserve + * @returns String The processed css + */ +YAHOO.compressor._extractDataUrls = function (css, preservedTokens) { + + // Leave data urls alone to increase parse performance. + var maxIndex = css.length - 1, + appendIndex = 0, + startIndex, + endIndex, + terminator, + foundTerminator, + sb = [], + m, + preserver, + token, + pattern = /url\(\s*(["']?)data\:/g; + + // Since we need to account for non-base64 data urls, we need to handle + // ' and ) being part of the data string. Hence switching to indexOf, + // to determine whether or not we have matching string terminators and + // handling sb appends directly, instead of using matcher.append* methods. + + while ((m = pattern.exec(css)) !== null) { + + startIndex = m.index + 4; // "url(".length() + terminator = m[1]; // ', " or empty (not quoted) + + if (terminator.length === 0) { + terminator = ")"; + } + + foundTerminator = false; + + endIndex = pattern.lastIndex - 1; + + while(foundTerminator === false && endIndex+1 <= maxIndex) { + endIndex = css.indexOf(terminator, endIndex + 1); + + // endIndex == 0 doesn't really apply here + if ((endIndex > 0) && (css.charAt(endIndex - 1) !== '\\')) { + foundTerminator = true; + if (")" != terminator) { + endIndex = css.indexOf(")", endIndex); + } + } + } + + // Enough searching, start moving stuff over to the buffer + sb.push(css.substring(appendIndex, m.index)); + + if (foundTerminator) { + token = css.substring(startIndex, endIndex); + token = token.replace(/\s+/g, ""); + preservedTokens.push(token); + + preserver = "url(___YUICSSMIN_PRESERVED_TOKEN_" + (preservedTokens.length - 1) + "___)"; + sb.push(preserver); + + appendIndex = endIndex + 1; + } else { + // No end terminator found, re-add the whole match. Should we throw/warn here? + sb.push(css.substring(m.index, pattern.lastIndex)); + appendIndex = pattern.lastIndex; + } + } + + sb.push(css.substring(appendIndex)); + + return sb.join(""); +}; + +/** + * Utility method to compress hex color values of the form #AABBCC to #ABC. + * + * DOES NOT compress CSS ID selectors which match the above pattern (which would break things). + * e.g. #AddressForm { ... } + * + * DOES NOT compress IE filters, which have hex color values (which would break things). + * e.g. filter: chroma(color="#FFFFFF"); + * + * DOES NOT compress invalid hex values. + * e.g. background-color: #aabbccdd + * + * @private + * @method _compressHexColors + * @param {String} css The input css + * @returns String The processed css + */ +YAHOO.compressor._compressHexColors = function(css) { + + // Look for hex colors inside { ... } (to avoid IDs) and which don't have a =, or a " in front of them (to avoid filters) + var pattern = /(\=\s*?["']?)?#([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])(\}|[^0-9a-f{][^{]*?\})/gi, + m, + index = 0, + isFilter, + sb = []; + + while ((m = pattern.exec(css)) !== null) { + + sb.push(css.substring(index, m.index)); + + isFilter = m[1]; + + if (isFilter) { + // Restore, maintain case, otherwise filter will break + sb.push(m[1] + "#" + (m[2] + m[3] + m[4] + m[5] + m[6] + m[7])); + } else { + if (m[2].toLowerCase() == m[3].toLowerCase() && + m[4].toLowerCase() == m[5].toLowerCase() && + m[6].toLowerCase() == m[7].toLowerCase()) { + + // Compress. + sb.push("#" + (m[3] + m[5] + m[7]).toLowerCase()); + } else { + // Non compressible color, restore but lower case. + sb.push("#" + (m[2] + m[3] + m[4] + m[5] + m[6] + m[7]).toLowerCase()); + } + } + + index = pattern.lastIndex = pattern.lastIndex - m[8].length; + } + + sb.push(css.substring(index)); + + return sb.join(""); +}; + +YAHOO.compressor.cssmin = function (css, linebreakpos) { + + var startIndex = 0, + endIndex = 0, + i = 0, max = 0, + preservedTokens = [], + comments = [], + token = '', + totallen = css.length, + placeholder = ''; + + css = this._extractDataUrls(css, preservedTokens); + + // collect all comment blocks... + while ((startIndex = css.indexOf("/*", startIndex)) >= 0) { + endIndex = css.indexOf("*/", startIndex + 2); + if (endIndex < 0) { + endIndex = totallen; + } + token = css.slice(startIndex + 2, endIndex); + comments.push(token); + css = css.slice(0, startIndex + 2) + "___YUICSSMIN_PRESERVE_CANDIDATE_COMMENT_" + (comments.length - 1) + "___" + css.slice(endIndex); + startIndex += 2; + } + + // preserve strings so their content doesn't get accidentally minified + css = css.replace(/("([^\\"]|\\.|\\)*")|('([^\\']|\\.|\\)*')/g, function (match) { + var i, max, quote = match.substring(0, 1); + + match = match.slice(1, -1); + + // maybe the string contains a comment-like substring? + // one, maybe more? put'em back then + if (match.indexOf("___YUICSSMIN_PRESERVE_CANDIDATE_COMMENT_") >= 0) { + for (i = 0, max = comments.length; i < max; i = i + 1) { + match = match.replace("___YUICSSMIN_PRESERVE_CANDIDATE_COMMENT_" + i + "___", comments[i]); + } + } + + // minify alpha opacity in filter strings + match = match.replace(/progid:DXImageTransform\.Microsoft\.Alpha\(Opacity=/gi, "alpha(opacity="); + + preservedTokens.push(match); + return quote + "___YUICSSMIN_PRESERVED_TOKEN_" + (preservedTokens.length - 1) + "___" + quote; + }); + + // strings are safe, now wrestle the comments + for (i = 0, max = comments.length; i < max; i = i + 1) { + + token = comments[i]; + placeholder = "___YUICSSMIN_PRESERVE_CANDIDATE_COMMENT_" + i + "___"; + + // ! in the first position of the comment means preserve + // so push to the preserved tokens keeping the ! + if (token.charAt(0) === "!") { + preservedTokens.push(token); + css = css.replace(placeholder, "___YUICSSMIN_PRESERVED_TOKEN_" + (preservedTokens.length - 1) + "___"); + continue; + } + + // \ in the last position looks like hack for Mac/IE5 + // shorten that to /*\*/ and the next one to /**/ + if (token.charAt(token.length - 1) === "\\") { + preservedTokens.push("\\"); + css = css.replace(placeholder, "___YUICSSMIN_PRESERVED_TOKEN_" + (preservedTokens.length - 1) + "___"); + i = i + 1; // attn: advancing the loop + preservedTokens.push(""); + css = css.replace("___YUICSSMIN_PRESERVE_CANDIDATE_COMMENT_" + i + "___", "___YUICSSMIN_PRESERVED_TOKEN_" + (preservedTokens.length - 1) + "___"); + continue; + } + + // keep empty comments after child selectors (IE7 hack) + // e.g. html >/**/ body + if (token.length === 0) { + startIndex = css.indexOf(placeholder); + if (startIndex > 2) { + if (css.charAt(startIndex - 3) === '>') { + preservedTokens.push(""); + css = css.replace(placeholder, "___YUICSSMIN_PRESERVED_TOKEN_" + (preservedTokens.length - 1) + "___"); + } + } + } + + // in all other cases kill the comment + css = css.replace("/*" + placeholder + "*/", ""); + } + + + // Normalize all whitespace strings to single spaces. Easier to work with that way. + css = css.replace(/\s+/g, " "); + + // Remove the spaces before the things that should not have spaces before them. + // But, be careful not to turn "p :link {...}" into "p:link{...}" + // Swap out any pseudo-class colons with the token, and then swap back. + css = css.replace(/(^|\})(([^\{:])+:)+([^\{]*\{)/g, function (m) { + return m.replace(":", "___YUICSSMIN_PSEUDOCLASSCOLON___"); + }); + css = css.replace(/\s+([!{};:>+\(\)\],])/g, '$1'); + css = css.replace(/___YUICSSMIN_PSEUDOCLASSCOLON___/g, ":"); + + // retain space for special IE6 cases + css = css.replace(/:first-(line|letter)(\{|,)/g, ":first-$1 $2"); + + // no space after the end of a preserved comment + css = css.replace(/\*\/ /g, '*/'); + + + // If there is a @charset, then only allow one, and push to the top of the file. + css = css.replace(/^(.*)(@charset "[^"]*";)/gi, '$2$1'); + css = css.replace(/^(\s*@charset [^;]+;\s*)+/gi, '$1'); + + // Put the space back in some cases, to support stuff like + // @media screen and (-webkit-min-device-pixel-ratio:0){ + css = css.replace(/\band\(/gi, "and ("); + + + // Remove the spaces after the things that should not have spaces after them. + css = css.replace(/([!{}:;>+\(\[,])\s+/g, '$1'); + + // remove unnecessary semicolons + css = css.replace(/;+\}/g, "}"); + + // Replace 0(px,em,%) with 0. + css = css.replace(/([\s:])(0)(px|em|%|in|cm|mm|pc|pt|ex)/gi, "$1$2"); + + // Replace 0 0 0 0; with 0. + css = css.replace(/:0 0 0 0(;|\})/g, ":0$1"); + css = css.replace(/:0 0 0(;|\})/g, ":0$1"); + css = css.replace(/:0 0(;|\})/g, ":0$1"); + + // Replace background-position:0; with background-position:0 0; + // same for transform-origin + css = css.replace(/(background-position|transform-origin|webkit-transform-origin|moz-transform-origin|o-transform-origin|ms-transform-origin):0(;|\})/gi, function(all, prop, tail) { + return prop.toLowerCase() + ":0 0" + tail; + }); + + // Replace 0.6 to .6, but only when preceded by : or a white-space + css = css.replace(/(:|\s)0+\.(\d+)/g, "$1.$2"); + + // Shorten colors from rgb(51,102,153) to #336699 + // This makes it more likely that it'll get further compressed in the next step. + css = css.replace(/rgb\s*\(\s*([0-9,\s]+)\s*\)/gi, function () { + var i, rgbcolors = arguments[1].split(','); + for (i = 0; i < rgbcolors.length; i = i + 1) { + rgbcolors[i] = parseInt(rgbcolors[i], 10).toString(16); + if (rgbcolors[i].length === 1) { + rgbcolors[i] = '0' + rgbcolors[i]; + } + } + return '#' + rgbcolors.join(''); + }); + + // Shorten colors from #AABBCC to #ABC. + css = this._compressHexColors(css); + + // border: none -> border:0 + css = css.replace(/(border|border-top|border-right|border-bottom|border-right|outline|background):none(;|\})/gi, function(all, prop, tail) { + return prop.toLowerCase() + ":0" + tail; + }); + + // shorter opacity IE filter + css = css.replace(/progid:DXImageTransform\.Microsoft\.Alpha\(Opacity=/gi, "alpha(opacity="); + + // Remove empty rules. + css = css.replace(/[^\};\{\/]+\{\}/g, ""); + + if (linebreakpos >= 0) { + // Some source control tools don't like it when files containing lines longer + // than, say 8000 characters, are checked in. The linebreak option is used in + // that case to split long lines after a specific column. + startIndex = 0; + i = 0; + while (i < css.length) { + i = i + 1; + if (css[i - 1] === '}' && i - startIndex > linebreakpos) { + css = css.slice(0, i) + '\n' + css.slice(i); + startIndex = i; + } + } + } + + // Replace multiple semi-colons in a row by a single one + // See SF bug #1980989 + css = css.replace(/;;+/g, ";"); + + // restore preserved comments and strings + for (i = 0, max = preservedTokens.length; i < max; i = i + 1) { + css = css.replace("___YUICSSMIN_PRESERVED_TOKEN_" + i + "___", preservedTokens[i]); + } + + // Trim the final string (for any leading or trailing white spaces) + css = css.replace(/^\s+|\s+$/g, ""); + + return css; + +}; + +exports.compressor = YAHOO.compressor; diff --git a/bin/lib/less/functions.js b/bin/lib/less/functions.js new file mode 100644 index 0000000000..6eb34bac8c --- /dev/null +++ b/bin/lib/less/functions.js @@ -0,0 +1,228 @@ +(function (tree) { + +tree.functions = { + rgb: function (r, g, b) { + return this.rgba(r, g, b, 1.0); + }, + rgba: function (r, g, b, a) { + var rgb = [r, g, b].map(function (c) { return number(c) }), + a = number(a); + return new(tree.Color)(rgb, a); + }, + hsl: function (h, s, l) { + return this.hsla(h, s, l, 1.0); + }, + hsla: function (h, s, l, a) { + h = (number(h) % 360) / 360; + s = number(s); l = number(l); a = number(a); + + var m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s; + var m1 = l * 2 - m2; + + return this.rgba(hue(h + 1/3) * 255, + hue(h) * 255, + hue(h - 1/3) * 255, + a); + + function hue(h) { + h = h < 0 ? h + 1 : (h > 1 ? h - 1 : h); + if (h * 6 < 1) return m1 + (m2 - m1) * h * 6; + else if (h * 2 < 1) return m2; + else if (h * 3 < 2) return m1 + (m2 - m1) * (2/3 - h) * 6; + else return m1; + } + }, + hue: function (color) { + return new(tree.Dimension)(Math.round(color.toHSL().h)); + }, + saturation: function (color) { + return new(tree.Dimension)(Math.round(color.toHSL().s * 100), '%'); + }, + lightness: function (color) { + return new(tree.Dimension)(Math.round(color.toHSL().l * 100), '%'); + }, + alpha: function (color) { + return new(tree.Dimension)(color.toHSL().a); + }, + saturate: function (color, amount) { + var hsl = color.toHSL(); + + hsl.s += amount.value / 100; + hsl.s = clamp(hsl.s); + return hsla(hsl); + }, + desaturate: function (color, amount) { + var hsl = color.toHSL(); + + hsl.s -= amount.value / 100; + hsl.s = clamp(hsl.s); + return hsla(hsl); + }, + lighten: function (color, amount) { + var hsl = color.toHSL(); + + hsl.l += amount.value / 100; + hsl.l = clamp(hsl.l); + return hsla(hsl); + }, + darken: function (color, amount) { + var hsl = color.toHSL(); + + hsl.l -= amount.value / 100; + hsl.l = clamp(hsl.l); + return hsla(hsl); + }, + fadein: function (color, amount) { + var hsl = color.toHSL(); + + hsl.a += amount.value / 100; + hsl.a = clamp(hsl.a); + return hsla(hsl); + }, + fadeout: function (color, amount) { + var hsl = color.toHSL(); + + hsl.a -= amount.value / 100; + hsl.a = clamp(hsl.a); + return hsla(hsl); + }, + fade: function (color, amount) { + var hsl = color.toHSL(); + + hsl.a = amount.value / 100; + hsl.a = clamp(hsl.a); + return hsla(hsl); + }, + spin: function (color, amount) { + var hsl = color.toHSL(); + var hue = (hsl.h + amount.value) % 360; + + hsl.h = hue < 0 ? 360 + hue : hue; + + return hsla(hsl); + }, + // + // Copyright (c) 2006-2009 Hampton Catlin, Nathan Weizenbaum, and Chris Eppstein + // http://sass-lang.com + // + mix: function (color1, color2, weight) { + var p = weight.value / 100.0; + var w = p * 2 - 1; + var a = color1.toHSL().a - color2.toHSL().a; + + var w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0; + var w2 = 1 - w1; + + var rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2, + color1.rgb[1] * w1 + color2.rgb[1] * w2, + color1.rgb[2] * w1 + color2.rgb[2] * w2]; + + var alpha = color1.alpha * p + color2.alpha * (1 - p); + + return new(tree.Color)(rgb, alpha); + }, + greyscale: function (color) { + return this.desaturate(color, new(tree.Dimension)(100)); + }, + e: function (str) { + return new(tree.Anonymous)(str instanceof tree.JavaScript ? str.evaluated : str); + }, + escape: function (str) { + return new(tree.Anonymous)(encodeURI(str.value).replace(/=/g, "%3D").replace(/:/g, "%3A").replace(/#/g, "%23").replace(/;/g, "%3B").replace(/\(/g, "%28").replace(/\)/g, "%29")); + }, + '%': function (quoted /* arg, arg, ...*/) { + var args = Array.prototype.slice.call(arguments, 1), + str = quoted.value; + + for (var i = 0; i < args.length; i++) { + str = str.replace(/%[sda]/i, function(token) { + var value = token.match(/s/i) ? args[i].value : args[i].toCSS(); + return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value; + }); + } + str = str.replace(/%%/g, '%'); + return new(tree.Quoted)('"' + str + '"', str); + }, + round: function (n) { + return this._math('round', n); + }, + ceil: function (n) { + return this._math('ceil', n); + }, + floor: function (n) { + return this._math('floor', n); + }, + _math: function (fn, n) { + if (n instanceof tree.Dimension) { + return new(tree.Dimension)(Math[fn](number(n)), n.unit); + } else if (typeof(n) === 'number') { + return Math[fn](n); + } else { + throw { type: "Argument", message: "argument must be a number" }; + } + }, + argb: function (color) { + return new(tree.Anonymous)(color.toARGB()); + + }, + percentage: function (n) { + return new(tree.Dimension)(n.value * 100, '%'); + }, + color: function (n) { + if (n instanceof tree.Quoted) { + return new(tree.Color)(n.value.slice(1)); + } else { + throw { type: "Argument", message: "argument must be a string" }; + } + }, + iscolor: function (n) { + return this._isa(n, tree.Color); + }, + isnumber: function (n) { + return this._isa(n, tree.Dimension); + }, + isstring: function (n) { + return this._isa(n, tree.Quoted); + }, + iskeyword: function (n) { + return this._isa(n, tree.Keyword); + }, + isurl: function (n) { + return this._isa(n, tree.URL); + }, + ispixel: function (n) { + return (n instanceof tree.Dimension) && n.unit === 'px' ? tree.True : tree.False; + }, + ispercentage: function (n) { + return (n instanceof tree.Dimension) && n.unit === '%' ? tree.True : tree.False; + }, + isem: function (n) { + return (n instanceof tree.Dimension) && n.unit === 'em' ? tree.True : tree.False; + }, + _isa: function (n, Type) { + return (n instanceof Type) ? tree.True : tree.False; + } +}; + +function hsla(hsla) { + return tree.functions.hsla(hsla.h, hsla.s, hsla.l, hsla.a); +} + +function number(n) { + if (n instanceof tree.Dimension) { + return parseFloat(n.unit == '%' ? n.value / 100 : n.value); + } else if (typeof(n) === 'number') { + return n; + } else { + throw { + error: "RuntimeError", + message: "color functions take numbers as parameters" + }; + } +} + +function clamp(val) { + return Math.min(1, Math.max(0, val)); +} + +})(require('./tree')); diff --git a/bin/lib/less/index.js b/bin/lib/less/index.js new file mode 100644 index 0000000000..a11fa998d1 --- /dev/null +++ b/bin/lib/less/index.js @@ -0,0 +1,148 @@ +var path = require('path'), + sys = require('util'), + fs = require('fs'); + +var less = { + version: [1, 3, 0], + Parser: require('./parser').Parser, + importer: require('./parser').importer, + tree: require('./tree'), + render: function (input, options, callback) { + options = options || {}; + + if (typeof(options) === 'function') { + callback = options, options = {}; + } + + var parser = new(less.Parser)(options), + ee; + + if (callback) { + parser.parse(input, function (e, root) { + callback(e, root && root.toCSS && root.toCSS(options)); + }); + } else { + ee = new(require('events').EventEmitter); + + process.nextTick(function () { + parser.parse(input, function (e, root) { + if (e) { ee.emit('error', e) } + else { ee.emit('success', root.toCSS(options)) } + }); + }); + return ee; + } + }, + writeError: function (ctx, options) { + options = options || {}; + + var message = ""; + var extract = ctx.extract; + var error = []; + var stylize = options.color ? less.stylize : function (str) { return str }; + + if (options.silent) { return } + + if (ctx.stack) { return sys.error(stylize(ctx.stack, 'red')) } + + if (!ctx.hasOwnProperty('index')) { + return sys.error(ctx.stack || ctx.message); + } + + if (typeof(extract[0]) === 'string') { + error.push(stylize((ctx.line - 1) + ' ' + extract[0], 'grey')); + } + + if (extract[1]) { + error.push(ctx.line + ' ' + extract[1].slice(0, ctx.column) + + stylize(stylize(stylize(extract[1][ctx.column], 'bold') + + extract[1].slice(ctx.column + 1), 'red'), 'inverse')); + } + + if (typeof(extract[2]) === 'string') { + error.push(stylize((ctx.line + 1) + ' ' + extract[2], 'grey')); + } + error = error.join('\n') + '\033[0m\n'; + + message += stylize(ctx.type + 'Error: ' + ctx.message, 'red'); + ctx.filename && (message += stylize(' in ', 'red') + ctx.filename + + stylize(':' + ctx.line + ':' + ctx.column, 'grey')); + + sys.error(message, error); + + if (ctx.callLine) { + sys.error(stylize('from ', 'red') + (ctx.filename || '')); + sys.error(stylize(ctx.callLine, 'grey') + ' ' + ctx.callExtract); + } + } +}; + +['color', 'directive', 'operation', 'dimension', + 'keyword', 'variable', 'ruleset', 'element', + 'selector', 'quoted', 'expression', 'rule', + 'call', 'url', 'alpha', 'import', + 'mixin', 'comment', 'anonymous', 'value', + 'javascript', 'assignment', 'condition', 'paren', + 'media' +].forEach(function (n) { + require('./tree/' + n); +}); + +less.Parser.importer = function (file, paths, callback, env) { + var pathname; + + // TODO: Undo this at some point, + // or use different approach. + paths.unshift('.'); + + for (var i = 0; i < paths.length; i++) { + try { + pathname = path.join(paths[i], file); + fs.statSync(pathname); + break; + } catch (e) { + pathname = null; + } + } + + if (pathname) { + fs.readFile(pathname, 'utf-8', function(e, data) { + if (e) return callback(e); + + new(less.Parser)({ + paths: [path.dirname(pathname)].concat(paths), + filename: pathname + }).parse(data, function (e, root) { + callback(e, root, data); + }); + }); + } else { + if (typeof(env.errback) === "function") { + env.errback(file, paths, callback); + } else { + callback({ type: 'File', message: "'" + file + "' wasn't found.\n" }); + } + } +} + +require('./functions'); +require('./colors'); + +for (var k in less) { exports[k] = less[k] } + +// Stylize a string +function stylize(str, style) { + var styles = { + 'bold' : [1, 22], + 'inverse' : [7, 27], + 'underline' : [4, 24], + 'yellow' : [33, 39], + 'green' : [32, 39], + 'red' : [31, 39], + 'grey' : [90, 39] + }; + return '\033[' + styles[style][0] + 'm' + str + + '\033[' + styles[style][1] + 'm'; +} +less.stylize = stylize; + diff --git a/bin/lib/less/parser.js b/bin/lib/less/parser.js new file mode 100644 index 0000000000..d732e1b156 --- /dev/null +++ b/bin/lib/less/parser.js @@ -0,0 +1,1334 @@ +var less, tree; + +if (typeof environment === "object" && ({}).toString.call(environment) === "[object Environment]") { + // Rhino + // Details on how to detect Rhino: https://github.com/ringo/ringojs/issues/88 + if (typeof(window) === 'undefined') { less = {} } + else { less = window.less = {} } + tree = less.tree = {}; + less.mode = 'rhino'; +} else if (typeof(window) === 'undefined') { + // Node.js + less = exports, + tree = require('./tree'); + less.mode = 'node'; +} else { + // Browser + if (typeof(window.less) === 'undefined') { window.less = {} } + less = window.less, + tree = window.less.tree = {}; + less.mode = 'browser'; +} +// +// less.js - parser +// +// A relatively straight-forward predictive parser. +// There is no tokenization/lexing stage, the input is parsed +// in one sweep. +// +// To make the parser fast enough to run in the browser, several +// optimization had to be made: +// +// - Matching and slicing on a huge input is often cause of slowdowns. +// The solution is to chunkify the input into smaller strings. +// The chunks are stored in the `chunks` var, +// `j` holds the current chunk index, and `current` holds +// the index of the current chunk in relation to `input`. +// This gives us an almost 4x speed-up. +// +// - In many cases, we don't need to match individual tokens; +// for example, if a value doesn't hold any variables, operations +// or dynamic references, the parser can effectively 'skip' it, +// treating it as a literal. +// An example would be '1px solid #000' - which evaluates to itself, +// we don't need to know what the individual components are. +// The drawback, of course is that you don't get the benefits of +// syntax-checking on the CSS. This gives us a 50% speed-up in the parser, +// and a smaller speed-up in the code-gen. +// +// +// Token matching is done with the `$` function, which either takes +// a terminal string or regexp, or a non-terminal function to call. +// It also takes care of moving all the indices forwards. +// +// +less.Parser = function Parser(env) { + var input, // LeSS input string + i, // current index in `input` + j, // current chunk + temp, // temporarily holds a chunk's state, for backtracking + memo, // temporarily holds `i`, when backtracking + furthest, // furthest index the parser has gone to + chunks, // chunkified input + current, // index of current chunk, in `input` + parser; + + var that = this; + + // This function is called after all files + // have been imported through `@import`. + var finish = function () {}; + + var imports = this.imports = { + paths: env && env.paths || [], // Search paths, when importing + queue: [], // Files which haven't been imported yet + files: {}, // Holds the imported parse trees + contents: {}, // Holds the imported file contents + mime: env && env.mime, // MIME type of .less files + error: null, // Error in parsing/evaluating an import + push: function (path, callback) { + var that = this; + this.queue.push(path); + + // + // Import a file asynchronously + // + less.Parser.importer(path, this.paths, function (e, root, contents) { + that.queue.splice(that.queue.indexOf(path), 1); // Remove the path from the queue + + var imported = path in that.files; + + that.files[path] = root; // Store the root + that.contents[path] = contents; + + if (e && !that.error) { that.error = e } + + callback(e, root, imported); + + if (that.queue.length === 0) { finish() } // Call `finish` if we're done importing + }, env); + } + }; + + function save() { temp = chunks[j], memo = i, current = i } + function restore() { chunks[j] = temp, i = memo, current = i } + + function sync() { + if (i > current) { + chunks[j] = chunks[j].slice(i - current); + current = i; + } + } + // + // Parse from a token, regexp or string, and move forward if match + // + function $(tok) { + var match, args, length, c, index, endIndex, k, mem; + + // + // Non-terminal + // + if (tok instanceof Function) { + return tok.call(parser.parsers); + // + // Terminal + // + // Either match a single character in the input, + // or match a regexp in the current chunk (chunk[j]). + // + } else if (typeof(tok) === 'string') { + match = input.charAt(i) === tok ? tok : null; + length = 1; + sync (); + } else { + sync (); + + if (match = tok.exec(chunks[j])) { + length = match[0].length; + } else { + return null; + } + } + + // The match is confirmed, add the match length to `i`, + // and consume any extra white-space characters (' ' || '\n') + // which come after that. The reason for this is that LeSS's + // grammar is mostly white-space insensitive. + // + if (match) { + mem = i += length; + endIndex = i + chunks[j].length - length; + + while (i < endIndex) { + c = input.charCodeAt(i); + if (! (c === 32 || c === 10 || c === 9)) { break } + i++; + } + chunks[j] = chunks[j].slice(length + (i - mem)); + current = i; + + if (chunks[j].length === 0 && j < chunks.length - 1) { j++ } + + if(typeof(match) === 'string') { + return match; + } else { + return match.length === 1 ? match[0] : match; + } + } + } + + function expect(arg, msg) { + var result = $(arg); + if (! result) { + error(msg || (typeof(arg) === 'string' ? "expected '" + arg + "' got '" + input.charAt(i) + "'" + : "unexpected token")); + } else { + return result; + } + } + + function error(msg, type) { + throw { index: i, type: type || 'Syntax', message: msg }; + } + + // Same as $(), but don't change the state of the parser, + // just return the match. + function peek(tok) { + if (typeof(tok) === 'string') { + return input.charAt(i) === tok; + } else { + if (tok.test(chunks[j])) { + return true; + } else { + return false; + } + } + } + + function basename(pathname) { + if (less.mode === 'node') { + return require('path').basename(pathname); + } else { + return pathname.match(/[^\/]+$/)[0]; + } + } + + function getInput(e, env) { + if (e.filename && env.filename && (e.filename !== env.filename)) { + return parser.imports.contents[basename(e.filename)]; + } else { + return input; + } + } + + function getLocation(index, input) { + for (var n = index, column = -1; + n >= 0 && input.charAt(n) !== '\n'; + n--) { column++ } + + return { line: typeof(index) === 'number' ? (input.slice(0, index).match(/\n/g) || "").length : null, + column: column }; + } + + function LessError(e, env) { + var input = getInput(e, env), + loc = getLocation(e.index, input), + line = loc.line, + col = loc.column, + lines = input.split('\n'); + + this.type = e.type || 'Syntax'; + this.message = e.message; + this.filename = e.filename || env.filename; + this.index = e.index; + this.line = typeof(line) === 'number' ? line + 1 : null; + this.callLine = e.call && (getLocation(e.call, input).line + 1); + this.callExtract = lines[getLocation(e.call, input).line]; + this.stack = e.stack; + this.column = col; + this.extract = [ + lines[line - 1], + lines[line], + lines[line + 1] + ]; + } + + this.env = env = env || {}; + + // The optimization level dictates the thoroughness of the parser, + // the lower the number, the less nodes it will create in the tree. + // This could matter for debugging, or if you want to access + // the individual nodes in the tree. + this.optimization = ('optimization' in this.env) ? this.env.optimization : 1; + + this.env.filename = this.env.filename || null; + + // + // The Parser + // + return parser = { + + imports: imports, + // + // Parse an input string into an abstract syntax tree, + // call `callback` when done. + // + parse: function (str, callback) { + var root, start, end, zone, line, lines, buff = [], c, error = null; + + i = j = current = furthest = 0; + input = str.replace(/\r\n/g, '\n'); + + // Split the input into chunks. + chunks = (function (chunks) { + var j = 0, + skip = /[^"'`\{\}\/\(\)\\]+/g, + comment = /\/\*(?:[^*]|\*+[^\/*])*\*+\/|\/\/.*/g, + string = /"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'|`((?:[^`\\\r\n]|\\.)*)`/g, + level = 0, + match, + chunk = chunks[0], + inParam; + + for (var i = 0, c, cc; i < input.length; i++) { + skip.lastIndex = i; + if (match = skip.exec(input)) { + if (match.index === i) { + i += match[0].length; + chunk.push(match[0]); + } + } + c = input.charAt(i); + comment.lastIndex = string.lastIndex = i; + + if (match = string.exec(input)) { + if (match.index === i) { + i += match[0].length; + chunk.push(match[0]); + c = input.charAt(i); + } + } + + if (!inParam && c === '/') { + cc = input.charAt(i + 1); + if (cc === '/' || cc === '*') { + if (match = comment.exec(input)) { + if (match.index === i) { + i += match[0].length; + chunk.push(match[0]); + c = input.charAt(i); + } + } + } + } + + switch (c) { + case '{': if (! inParam) { level ++; chunk.push(c); break } + case '}': if (! inParam) { level --; chunk.push(c); chunks[++j] = chunk = []; break } + case '(': if (! inParam) { inParam = true; chunk.push(c); break } + case ')': if ( inParam) { inParam = false; chunk.push(c); break } + default: chunk.push(c); + } + } + if (level > 0) { + error = new(LessError)({ + index: i, + type: 'Parse', + message: "missing closing `}`", + filename: env.filename + }, env); + } + + return chunks.map(function (c) { return c.join('') });; + })([[]]); + + if (error) { + return callback(error); + } + + // Start with the primary rule. + // The whole syntax tree is held under a Ruleset node, + // with the `root` property set to true, so no `{}` are + // output. The callback is called when the input is parsed. + try { + root = new(tree.Ruleset)([], $(this.parsers.primary)); + root.root = true; + } catch (e) { + return callback(new(LessError)(e, env)); + } + + root.toCSS = (function (evaluate) { + var line, lines, column; + + return function (options, variables) { + var frames = [], importError; + + options = options || {}; + // + // Allows setting variables with a hash, so: + // + // `{ color: new(tree.Color)('#f01') }` will become: + // + // new(tree.Rule)('@color', + // new(tree.Value)([ + // new(tree.Expression)([ + // new(tree.Color)('#f01') + // ]) + // ]) + // ) + // + if (typeof(variables) === 'object' && !Array.isArray(variables)) { + variables = Object.keys(variables).map(function (k) { + var value = variables[k]; + + if (! (value instanceof tree.Value)) { + if (! (value instanceof tree.Expression)) { + value = new(tree.Expression)([value]); + } + value = new(tree.Value)([value]); + } + return new(tree.Rule)('@' + k, value, false, 0); + }); + frames = [new(tree.Ruleset)(null, variables)]; + } + + try { + var css = evaluate.call(this, { frames: frames }) + .toCSS([], { compress: options.compress || false }); + } catch (e) { + throw new(LessError)(e, env); + } + + if ((importError = parser.imports.error)) { // Check if there was an error during importing + if (importError instanceof LessError) throw importError; + else throw new(LessError)(importError, env); + } + + if (options.yuicompress && less.mode === 'node') { + return require('./cssmin').compressor.cssmin(css); + } else if (options.compress) { + return css.replace(/(\s)+/g, "$1"); + } else { + return css; + } + }; + })(root.eval); + + // If `i` is smaller than the `input.length - 1`, + // it means the parser wasn't able to parse the whole + // string, so we've got a parsing error. + // + // We try to extract a \n delimited string, + // showing the line where the parse error occured. + // We split it up into two parts (the part which parsed, + // and the part which didn't), so we can color them differently. + if (i < input.length - 1) { + i = furthest; + lines = input.split('\n'); + line = (input.slice(0, i).match(/\n/g) || "").length + 1; + + for (var n = i, column = -1; n >= 0 && input.charAt(n) !== '\n'; n--) { column++ } + + error = { + type: "Parse", + message: "Syntax Error on line " + line, + index: i, + filename: env.filename, + line: line, + column: column, + extract: [ + lines[line - 2], + lines[line - 1], + lines[line] + ] + }; + } + + if (this.imports.queue.length > 0) { + finish = function () { callback(error, root) }; + } else { + callback(error, root); + } + }, + + // + // Here in, the parsing rules/functions + // + // The basic structure of the syntax tree generated is as follows: + // + // Ruleset -> Rule -> Value -> Expression -> Entity + // + // Here's some LESS code: + // + // .class { + // color: #fff; + // border: 1px solid #000; + // width: @w + 4px; + // > .child {...} + // } + // + // And here's what the parse tree might look like: + // + // Ruleset (Selector '.class', [ + // Rule ("color", Value ([Expression [Color #fff]])) + // Rule ("border", Value ([Expression [Dimension 1px][Keyword "solid"][Color #000]])) + // Rule ("width", Value ([Expression [Operation "+" [Variable "@w"][Dimension 4px]]])) + // Ruleset (Selector [Element '>', '.child'], [...]) + // ]) + // + // In general, most rules will try to parse a token with the `$()` function, and if the return + // value is truly, will return a new node, of the relevant type. Sometimes, we need to check + // first, before parsing, that's when we use `peek()`. + // + parsers: { + // + // The `primary` rule is the *entry* and *exit* point of the parser. + // The rules here can appear at any level of the parse tree. + // + // The recursive nature of the grammar is an interplay between the `block` + // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule, + // as represented by this simplified grammar: + // + // primary → (ruleset | rule)+ + // ruleset → selector+ block + // block → '{' primary '}' + // + // Only at one point is the primary rule not called from the + // block rule: at the root level. + // + primary: function () { + var node, root = []; + + while ((node = $(this.mixin.definition) || $(this.rule) || $(this.ruleset) || + $(this.mixin.call) || $(this.comment) || $(this.directive)) + || $(/^[\s\n]+/)) { + node && root.push(node); + } + return root; + }, + + // We create a Comment node for CSS comments `/* */`, + // but keep the LeSS comments `//` silent, by just skipping + // over them. + comment: function () { + var comment; + + if (input.charAt(i) !== '/') return; + + if (input.charAt(i + 1) === '/') { + return new(tree.Comment)($(/^\/\/.*/), true); + } else if (comment = $(/^\/\*(?:[^*]|\*+[^\/*])*\*+\/\n?/)) { + return new(tree.Comment)(comment); + } + }, + + // + // Entities are tokens which can be found inside an Expression + // + entities: { + // + // A string, which supports escaping " and ' + // + // "milky way" 'he\'s the one!' + // + quoted: function () { + var str, j = i, e; + + if (input.charAt(j) === '~') { j++, e = true } // Escaped strings + if (input.charAt(j) !== '"' && input.charAt(j) !== "'") return; + + e && $('~'); + + if (str = $(/^"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'/)) { + return new(tree.Quoted)(str[0], str[1] || str[2], e); + } + }, + + // + // A catch-all word, such as: + // + // black border-collapse + // + keyword: function () { + var k; + + if (k = $(/^[_A-Za-z-][_A-Za-z0-9-]*/)) { + if (tree.colors.hasOwnProperty(k)) { + // detect named color + return new(tree.Color)(tree.colors[k].slice(1)); + } else { + return new(tree.Keyword)(k); + } + } + }, + + // + // A function call + // + // rgb(255, 0, 255) + // + // We also try to catch IE's `alpha()`, but let the `alpha` parser + // deal with the details. + // + // The arguments are parsed with the `entities.arguments` parser. + // + call: function () { + var name, args, index = i; + + if (! (name = /^([\w-]+|%|progid:[\w\.]+)\(/.exec(chunks[j]))) return; + + name = name[1].toLowerCase(); + + if (name === 'url') { return null } + else { i += name.length } + + if (name === 'alpha') { return $(this.alpha) } + + $('('); // Parse the '(' and consume whitespace. + + args = $(this.entities.arguments); + + if (! $(')')) return; + + if (name) { return new(tree.Call)(name, args, index, env.filename) } + }, + arguments: function () { + var args = [], arg; + + while (arg = $(this.entities.assignment) || $(this.expression)) { + args.push(arg); + if (! $(',')) { break } + } + return args; + }, + literal: function () { + return $(this.entities.dimension) || + $(this.entities.color) || + $(this.entities.quoted); + }, + + // Assignments are argument entities for calls. + // They are present in ie filter properties as shown below. + // + // filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* ) + // + + assignment: function () { + var key, value; + if ((key = $(/^\w+(?=\s?=)/i)) && $('=') && (value = $(this.entity))) { + return new(tree.Assignment)(key, value); + } + }, + + // + // Parse url() tokens + // + // We use a specific rule for urls, because they don't really behave like + // standard function calls. The difference is that the argument doesn't have + // to be enclosed within a string, so it can't be parsed as an Expression. + // + url: function () { + var value; + + if (input.charAt(i) !== 'u' || !$(/^url\(/)) return; + value = $(this.entities.quoted) || $(this.entities.variable) || + $(this.entities.dataURI) || $(/^[-\w%@$\/.&=:;#+?~]+/) || ""; + + expect(')'); + + return new(tree.URL)((value.value || value.data || value instanceof tree.Variable) + ? value : new(tree.Anonymous)(value), imports.paths); + }, + + dataURI: function () { + var obj; + + if ($(/^data:/)) { + obj = {}; + obj.mime = $(/^[^\/]+\/[^,;)]+/) || ''; + obj.charset = $(/^;\s*charset=[^,;)]+/) || ''; + obj.base64 = $(/^;\s*base64/) || ''; + obj.data = $(/^,\s*[^)]+/); + + if (obj.data) { return obj } + } + }, + + // + // A Variable entity, such as `@fink`, in + // + // width: @fink + 2px + // + // We use a different parser for variable definitions, + // see `parsers.variable`. + // + variable: function () { + var name, index = i; + + if (input.charAt(i) === '@' && (name = $(/^@@?[\w-]+/))) { + return new(tree.Variable)(name, index, env.filename); + } + }, + + // + // A Hexadecimal color + // + // #4F3C2F + // + // `rgb` and `hsl` colors are parsed through the `entities.call` parser. + // + color: function () { + var rgb; + + if (input.charAt(i) === '#' && (rgb = $(/^#([a-fA-F0-9]{6}|[a-fA-F0-9]{3})/))) { + return new(tree.Color)(rgb[1]); + } + }, + + // + // A Dimension, that is, a number and a unit + // + // 0.5em 95% + // + dimension: function () { + var value, c = input.charCodeAt(i); + if ((c > 57 || c < 45) || c === 47) return; + + if (value = $(/^(-?\d*\.?\d+)(px|%|em|rem|pc|ex|in|deg|s|ms|pt|cm|mm|rad|grad|turn|dpi)?/)) { + return new(tree.Dimension)(value[1], value[2]); + } + }, + + // + // JavaScript code to be evaluated + // + // `window.location.href` + // + javascript: function () { + var str, j = i, e; + + if (input.charAt(j) === '~') { j++, e = true } // Escaped strings + if (input.charAt(j) !== '`') { return } + + e && $('~'); + + if (str = $(/^`([^`]*)`/)) { + return new(tree.JavaScript)(str[1], i, e); + } + } + }, + + // + // The variable part of a variable definition. Used in the `rule` parser + // + // @fink: + // + variable: function () { + var name; + + if (input.charAt(i) === '@' && (name = $(/^(@[\w-]+)\s*:/))) { return name[1] } + }, + + // + // A font size/line-height shorthand + // + // small/12px + // + // We need to peek first, or we'll match on keywords and dimensions + // + shorthand: function () { + var a, b; + + if (! peek(/^[@\w.%-]+\/[@\w.-]+/)) return; + + if ((a = $(this.entity)) && $('/') && (b = $(this.entity))) { + return new(tree.Shorthand)(a, b); + } + }, + + // + // Mixins + // + mixin: { + // + // A Mixin call, with an optional argument list + // + // #mixins > .square(#fff); + // .rounded(4px, black); + // .button; + // + // The `while` loop is there because mixins can be + // namespaced, but we only support the child and descendant + // selector for now. + // + call: function () { + var elements = [], e, c, args = [], arg, index = i, s = input.charAt(i), name, value, important = false; + + if (s !== '.' && s !== '#') { return } + + while (e = $(/^[#.](?:[\w-]|\\(?:[a-fA-F0-9]{1,6} ?|[^a-fA-F0-9]))+/)) { + elements.push(new(tree.Element)(c, e, i)); + c = $('>'); + } + if ($('(')) { + while (arg = $(this.expression)) { + value = arg; + name = null; + + // Variable + if (arg.value.length == 1) { + var val = arg.value[0]; + if (val instanceof tree.Variable) { + if ($(':')) { + if (value = $(this.expression)) { + name = val.name; + } else { + throw new(Error)("Expected value"); + } + } + } + } + + args.push({ name: name, value: value }); + + if (! $(',')) { break } + } + if (! $(')')) throw new(Error)("Expected )"); + } + + if ($(this.important)) { + important = true; + } + + if (elements.length > 0 && ($(';') || peek('}'))) { + return new(tree.mixin.Call)(elements, args, index, env.filename, important); + } + }, + + // + // A Mixin definition, with a list of parameters + // + // .rounded (@radius: 2px, @color) { + // ... + // } + // + // Until we have a finer grained state-machine, we have to + // do a look-ahead, to make sure we don't have a mixin call. + // See the `rule` function for more information. + // + // We start by matching `.rounded (`, and then proceed on to + // the argument list, which has optional default values. + // We store the parameters in `params`, with a `value` key, + // if there is a value, such as in the case of `@radius`. + // + // Once we've got our params list, and a closing `)`, we parse + // the `{...}` block. + // + definition: function () { + var name, params = [], match, ruleset, param, value, cond, variadic = false; + if ((input.charAt(i) !== '.' && input.charAt(i) !== '#') || + peek(/^[^{]*(;|})/)) return; + + save(); + + if (match = $(/^([#.](?:[\w-]|\\(?:[a-fA-F0-9]{1,6} ?|[^a-fA-F0-9]))+)\s*\(/)) { + name = match[1]; + + do { + if (input.charAt(i) === '.' && $(/^\.{3}/)) { + variadic = true; + break; + } else if (param = $(this.entities.variable) || $(this.entities.literal) + || $(this.entities.keyword)) { + // Variable + if (param instanceof tree.Variable) { + if ($(':')) { + value = expect(this.expression, 'expected expression'); + params.push({ name: param.name, value: value }); + } else if ($(/^\.{3}/)) { + params.push({ name: param.name, variadic: true }); + variadic = true; + break; + } else { + params.push({ name: param.name }); + } + } else { + params.push({ value: param }); + } + } else { + break; + } + } while ($(',')) + + expect(')'); + + if ($(/^when/)) { // Guard + cond = expect(this.conditions, 'expected condition'); + } + + ruleset = $(this.block); + + if (ruleset) { + return new(tree.mixin.Definition)(name, params, ruleset, cond, variadic); + } else { + restore(); + } + } + } + }, + + // + // Entities are the smallest recognized token, + // and can be found inside a rule's value. + // + entity: function () { + return $(this.entities.literal) || $(this.entities.variable) || $(this.entities.url) || + $(this.entities.call) || $(this.entities.keyword) || $(this.entities.javascript) || + $(this.comment); + }, + + // + // A Rule terminator. Note that we use `peek()` to check for '}', + // because the `block` rule will be expecting it, but we still need to make sure + // it's there, if ';' was ommitted. + // + end: function () { + return $(';') || peek('}'); + }, + + // + // IE's alpha function + // + // alpha(opacity=88) + // + alpha: function () { + var value; + + if (! $(/^\(opacity=/i)) return; + if (value = $(/^\d+/) || $(this.entities.variable)) { + expect(')'); + return new(tree.Alpha)(value); + } + }, + + // + // A Selector Element + // + // div + // + h1 + // #socks + // input[type="text"] + // + // Elements are the building blocks for Selectors, + // they are made out of a `Combinator` (see combinator rule), + // and an element name, such as a tag a class, or `*`. + // + element: function () { + var e, t, c, v; + + c = $(this.combinator); + e = $(/^(?:\d+\.\d+|\d+)%/) || $(/^(?:[.#]?|:*)(?:[\w-]|\\(?:[a-fA-F0-9]{1,6} ?|[^a-fA-F0-9]))+/) || + $('*') || $(this.attribute) || $(/^\([^)@]+\)/); + + if (! e) { + $('(') && (v = $(this.entities.variable)) && $(')') && (e = new(tree.Paren)(v)); + } + + if (e) { return new(tree.Element)(c, e, i) } + + if (c.value && c.value.charAt(0) === '&') { + return new(tree.Element)(c, null, i); + } + }, + + // + // Combinators combine elements together, in a Selector. + // + // Because our parser isn't white-space sensitive, special care + // has to be taken, when parsing the descendant combinator, ` `, + // as it's an empty space. We have to check the previous character + // in the input, to see if it's a ` ` character. More info on how + // we deal with this in *combinator.js*. + // + combinator: function () { + var match, c = input.charAt(i); + + if (c === '>' || c === '+' || c === '~') { + i++; + while (input.charAt(i) === ' ') { i++ } + return new(tree.Combinator)(c); + } else if (c === '&') { + match = '&'; + i++; + if(input.charAt(i) === ' ') { + match = '& '; + } + while (input.charAt(i) === ' ') { i++ } + return new(tree.Combinator)(match); + } else if (input.charAt(i - 1) === ' ') { + return new(tree.Combinator)(" "); + } else { + return new(tree.Combinator)(null); + } + }, + + // + // A CSS Selector + // + // .class > div + h1 + // li a:hover + // + // Selectors are made out of one or more Elements, see above. + // + selector: function () { + var sel, e, elements = [], c, match; + + if ($('(')) { + sel = $(this.entity); + expect(')'); + return new(tree.Selector)([new(tree.Element)('', sel, i)]); + } + + while (e = $(this.element)) { + c = input.charAt(i); + elements.push(e) + if (c === '{' || c === '}' || c === ';' || c === ',') { break } + } + + if (elements.length > 0) { return new(tree.Selector)(elements) } + }, + tag: function () { + return $(/^[a-zA-Z][a-zA-Z-]*[0-9]?/) || $('*'); + }, + attribute: function () { + var attr = '', key, val, op; + + if (! $('[')) return; + + if (key = $(/^[a-zA-Z-]+/) || $(this.entities.quoted)) { + if ((op = $(/^[|~*$^]?=/)) && + (val = $(this.entities.quoted) || $(/^[\w-]+/))) { + attr = [key, op, val.toCSS ? val.toCSS() : val].join(''); + } else { attr = key } + } + + if (! $(']')) return; + + if (attr) { return "[" + attr + "]" } + }, + + // + // The `block` rule is used by `ruleset` and `mixin.definition`. + // It's a wrapper around the `primary` rule, with added `{}`. + // + block: function () { + var content; + + if ($('{') && (content = $(this.primary)) && $('}')) { + return content; + } + }, + + // + // div, .class, body > p {...} + // + ruleset: function () { + var selectors = [], s, rules, match; + save(); + + while (s = $(this.selector)) { + selectors.push(s); + $(this.comment); + if (! $(',')) { break } + $(this.comment); + } + + if (selectors.length > 0 && (rules = $(this.block))) { + return new(tree.Ruleset)(selectors, rules, env.strictImports); + } else { + // Backtrack + furthest = i; + restore(); + } + }, + rule: function () { + var name, value, c = input.charAt(i), important, match; + save(); + + if (c === '.' || c === '#' || c === '&') { return } + + if (name = $(this.variable) || $(this.property)) { + if ((name.charAt(0) != '@') && (match = /^([^@+\/'"*`(;{}-]*);/.exec(chunks[j]))) { + i += match[0].length - 1; + value = new(tree.Anonymous)(match[1]); + } else if (name === "font") { + value = $(this.font); + } else { + value = $(this.value); + } + important = $(this.important); + + if (value && $(this.end)) { + return new(tree.Rule)(name, value, important, memo); + } else { + furthest = i; + restore(); + } + } + }, + + // + // An @import directive + // + // @import "lib"; + // + // Depending on our environemnt, importing is done differently: + // In the browser, it's an XHR request, in Node, it would be a + // file-system operation. The function used for importing is + // stored in `import`, which we pass to the Import constructor. + // + "import": function () { + var path, features, index = i; + var dir = $(/^@import(?:-(once))?\s+/); + + if (dir && (path = $(this.entities.quoted) || $(this.entities.url))) { + features = $(this.mediaFeatures); + if ($(';')) { + return new(tree.Import)(path, imports, features, (dir[1] === 'once'), index); + } + } + }, + + mediaFeature: function () { + var e, p, nodes = []; + + do { + if (e = $(this.entities.keyword)) { + nodes.push(e); + } else if ($('(')) { + p = $(this.property); + e = $(this.entity); + if ($(')')) { + if (p && e) { + nodes.push(new(tree.Paren)(new(tree.Rule)(p, e, null, i, true))); + } else if (e) { + nodes.push(new(tree.Paren)(e)); + } else { + return null; + } + } else { return null } + } + } while (e); + + if (nodes.length > 0) { + return new(tree.Expression)(nodes); + } + }, + + mediaFeatures: function () { + var e, features = []; + + do { + if (e = $(this.mediaFeature)) { + features.push(e); + if (! $(',')) { break } + } else if (e = $(this.entities.variable)) { + features.push(e); + if (! $(',')) { break } + } + } while (e); + + return features.length > 0 ? features : null; + }, + + media: function () { + var features, rules; + + if ($(/^@media/)) { + features = $(this.mediaFeatures); + + if (rules = $(this.block)) { + return new(tree.Media)(rules, features); + } + } + }, + + // + // A CSS Directive + // + // @charset "utf-8"; + // + directive: function () { + var name, value, rules, types, e, nodes; + + if (input.charAt(i) !== '@') return; + + if (value = $(this['import']) || $(this.media)) { + return value; + } else if (name = $(/^@page|@keyframes/) || $(/^@(?:-webkit-|-moz-|-o-|-ms-)[a-z0-9-]+/)) { + types = ($(/^[^{]+/) || '').trim(); + if (rules = $(this.block)) { + return new(tree.Directive)(name + " " + types, rules); + } + } else if (name = $(/^@[-a-z]+/)) { + if (name === '@font-face') { + if (rules = $(this.block)) { + return new(tree.Directive)(name, rules); + } + } else if ((value = $(this.entity)) && $(';')) { + return new(tree.Directive)(name, value); + } + } + }, + font: function () { + var value = [], expression = [], weight, shorthand, font, e; + + while (e = $(this.shorthand) || $(this.entity)) { + expression.push(e); + } + value.push(new(tree.Expression)(expression)); + + if ($(',')) { + while (e = $(this.expression)) { + value.push(e); + if (! $(',')) { break } + } + } + return new(tree.Value)(value); + }, + + // + // A Value is a comma-delimited list of Expressions + // + // font-family: Baskerville, Georgia, serif; + // + // In a Rule, a Value represents everything after the `:`, + // and before the `;`. + // + value: function () { + var e, expressions = [], important; + + while (e = $(this.expression)) { + expressions.push(e); + if (! $(',')) { break } + } + + if (expressions.length > 0) { + return new(tree.Value)(expressions); + } + }, + important: function () { + if (input.charAt(i) === '!') { + return $(/^! *important/); + } + }, + sub: function () { + var e; + + if ($('(') && (e = $(this.expression)) && $(')')) { + return e; + } + }, + multiplication: function () { + var m, a, op, operation; + if (m = $(this.operand)) { + while (!peek(/^\/\*/) && (op = ($('/') || $('*'))) && (a = $(this.operand))) { + operation = new(tree.Operation)(op, [operation || m, a]); + } + return operation || m; + } + }, + addition: function () { + var m, a, op, operation; + if (m = $(this.multiplication)) { + while ((op = $(/^[-+]\s+/) || (input.charAt(i - 1) != ' ' && ($('+') || $('-')))) && + (a = $(this.multiplication))) { + operation = new(tree.Operation)(op, [operation || m, a]); + } + return operation || m; + } + }, + conditions: function () { + var a, b, index = i, condition; + + if (a = $(this.condition)) { + while ($(',') && (b = $(this.condition))) { + condition = new(tree.Condition)('or', condition || a, b, index); + } + return condition || a; + } + }, + condition: function () { + var a, b, c, op, index = i, negate = false; + + if ($(/^not/)) { negate = true } + expect('('); + if (a = $(this.addition) || $(this.entities.keyword) || $(this.entities.quoted)) { + if (op = $(/^(?:>=|=<|[<=>])/)) { + if (b = $(this.addition) || $(this.entities.keyword) || $(this.entities.quoted)) { + c = new(tree.Condition)(op, a, b, index, negate); + } else { + error('expected expression'); + } + } else { + c = new(tree.Condition)('=', a, new(tree.Keyword)('true'), index, negate); + } + expect(')'); + return $(/^and/) ? new(tree.Condition)('and', c, $(this.condition)) : c; + } + }, + + // + // An operand is anything that can be part of an operation, + // such as a Color, or a Variable + // + operand: function () { + var negate, p = input.charAt(i + 1); + + if (input.charAt(i) === '-' && (p === '@' || p === '(')) { negate = $('-') } + var o = $(this.sub) || $(this.entities.dimension) || + $(this.entities.color) || $(this.entities.variable) || + $(this.entities.call); + return negate ? new(tree.Operation)('*', [new(tree.Dimension)(-1), o]) + : o; + }, + + // + // Expressions either represent mathematical operations, + // or white-space delimited Entities. + // + // 1px solid black + // @var * 2 + // + expression: function () { + var e, delim, entities = [], d; + + while (e = $(this.addition) || $(this.entity)) { + entities.push(e); + } + if (entities.length > 0) { + return new(tree.Expression)(entities); + } + }, + property: function () { + var name; + + if (name = $(/^(\*?-?[-a-z_0-9]+)\s*:/)) { + return name[1]; + } + } + } + }; +}; + +if (less.mode === 'browser' || less.mode === 'rhino') { + // + // Used by `@import` directives + // + less.Parser.importer = function (path, paths, callback, env) { + if (!/^([a-z]+:)?\//.test(path) && paths.length > 0) { + path = paths[0] + path; + } + // We pass `true` as 3rd argument, to force the reload of the import. + // This is so we can get the syntax tree as opposed to just the CSS output, + // as we need this to evaluate the current stylesheet. + loadStyleSheet({ href: path, title: path, type: env.mime }, function (e) { + if (e && typeof(env.errback) === "function") { + env.errback.call(null, path, paths, callback, env); + } else { + callback.apply(null, arguments); + } + }, true); + }; +} + diff --git a/bin/lib/less/rhino.js b/bin/lib/less/rhino.js new file mode 100644 index 0000000000..a2c5662fdf --- /dev/null +++ b/bin/lib/less/rhino.js @@ -0,0 +1,62 @@ +var name; + +function loadStyleSheet(sheet, callback, reload, remaining) { + var sheetName = name.slice(0, name.lastIndexOf('/') + 1) + sheet.href; + var input = readFile(sheetName); + var parser = new less.Parser({ + paths: [sheet.href.replace(/[\w\.-]+$/, '')] + }); + parser.parse(input, function (e, root) { + if (e) { + print("Error: " + e); + quit(1); + } + callback(root, sheet, { local: false, lastModified: 0, remaining: remaining }); + }); + + // callback({}, sheet, { local: true, remaining: remaining }); +} + +function writeFile(filename, content) { + var fstream = new java.io.FileWriter(filename); + var out = new java.io.BufferedWriter(fstream); + out.write(content); + out.close(); +} + +// Command line integration via Rhino +(function (args) { + name = args[0]; + var output = args[1]; + + if (!name) { + print('No files present in the fileset; Check your pattern match in build.xml'); + quit(1); + } + path = name.split("/");path.pop();path=path.join("/") + + var input = readFile(name); + + if (!input) { + print('lesscss: couldn\'t open file ' + name); + quit(1); + } + + var result; + var parser = new less.Parser(); + parser.parse(input, function (e, root) { + if (e) { + quit(1); + } else { + result = root.toCSS(); + if (output) { + writeFile(output, result); + print("Written to " + output); + } else { + print(result); + } + quit(0); + } + }); + print("done"); +}(arguments)); diff --git a/bin/lib/less/tree.js b/bin/lib/less/tree.js new file mode 100644 index 0000000000..24ecd71203 --- /dev/null +++ b/bin/lib/less/tree.js @@ -0,0 +1,17 @@ +(function (tree) { + +tree.find = function (obj, fun) { + for (var i = 0, r; i < obj.length; i++) { + if (r = fun.call(obj, obj[i])) { return r } + } + return null; +}; +tree.jsify = function (obj) { + if (Array.isArray(obj.value) && (obj.value.length > 1)) { + return '[' + obj.value.map(function (v) { return v.toCSS(false) }).join(', ') + ']'; + } else { + return obj.toCSS(false); + } +}; + +})(require('./tree')); diff --git a/bin/lib/less/tree/alpha.js b/bin/lib/less/tree/alpha.js new file mode 100644 index 0000000000..139ae9204c --- /dev/null +++ b/bin/lib/less/tree/alpha.js @@ -0,0 +1,17 @@ +(function (tree) { + +tree.Alpha = function (val) { + this.value = val; +}; +tree.Alpha.prototype = { + toCSS: function () { + return "alpha(opacity=" + + (this.value.toCSS ? this.value.toCSS() : this.value) + ")"; + }, + eval: function (env) { + if (this.value.eval) { this.value = this.value.eval(env) } + return this; + } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/anonymous.js b/bin/lib/less/tree/anonymous.js new file mode 100644 index 0000000000..460c9ec784 --- /dev/null +++ b/bin/lib/less/tree/anonymous.js @@ -0,0 +1,13 @@ +(function (tree) { + +tree.Anonymous = function (string) { + this.value = string.value || string; +}; +tree.Anonymous.prototype = { + toCSS: function () { + return this.value; + }, + eval: function () { return this } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/assignment.js b/bin/lib/less/tree/assignment.js new file mode 100644 index 0000000000..70ce6e2f05 --- /dev/null +++ b/bin/lib/less/tree/assignment.js @@ -0,0 +1,17 @@ +(function (tree) { + +tree.Assignment = function (key, val) { + this.key = key; + this.value = val; +}; +tree.Assignment.prototype = { + toCSS: function () { + return this.key + '=' + (this.value.toCSS ? this.value.toCSS() : this.value); + }, + eval: function (env) { + if (this.value.eval) { this.value = this.value.eval(env) } + return this; + } +}; + +})(require('../tree')); \ No newline at end of file diff --git a/bin/lib/less/tree/call.js b/bin/lib/less/tree/call.js new file mode 100644 index 0000000000..c1465dd47c --- /dev/null +++ b/bin/lib/less/tree/call.js @@ -0,0 +1,48 @@ +(function (tree) { + +// +// A function call node. +// +tree.Call = function (name, args, index, filename) { + this.name = name; + this.args = args; + this.index = index; + this.filename = filename; +}; +tree.Call.prototype = { + // + // When evaluating a function call, + // we either find the function in `tree.functions` [1], + // in which case we call it, passing the evaluated arguments, + // or we simply print it out as it appeared originally [2]. + // + // The *functions.js* file contains the built-in functions. + // + // The reason why we evaluate the arguments, is in the case where + // we try to pass a variable to a function, like: `saturate(@color)`. + // The function should receive the value, not the variable. + // + eval: function (env) { + var args = this.args.map(function (a) { return a.eval(env) }); + + if (this.name in tree.functions) { // 1. + try { + return tree.functions[this.name].apply(tree.functions, args); + } catch (e) { + throw { type: e.type || "Runtime", + message: "error evaluating function `" + this.name + "`" + + (e.message ? ': ' + e.message : ''), + index: this.index, filename: this.filename }; + } + } else { // 2. + return new(tree.Anonymous)(this.name + + "(" + args.map(function (a) { return a.toCSS() }).join(', ') + ")"); + } + }, + + toCSS: function (env) { + return this.eval(env).toCSS(); + } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/color.js b/bin/lib/less/tree/color.js new file mode 100644 index 0000000000..37ce1781d2 --- /dev/null +++ b/bin/lib/less/tree/color.js @@ -0,0 +1,101 @@ +(function (tree) { +// +// RGB Colors - #ff0014, #eee +// +tree.Color = function (rgb, a) { + // + // The end goal here, is to parse the arguments + // into an integer triplet, such as `128, 255, 0` + // + // This facilitates operations and conversions. + // + if (Array.isArray(rgb)) { + this.rgb = rgb; + } else if (rgb.length == 6) { + this.rgb = rgb.match(/.{2}/g).map(function (c) { + return parseInt(c, 16); + }); + } else { + this.rgb = rgb.split('').map(function (c) { + return parseInt(c + c, 16); + }); + } + this.alpha = typeof(a) === 'number' ? a : 1; +}; +tree.Color.prototype = { + eval: function () { return this }, + + // + // If we have some transparency, the only way to represent it + // is via `rgba`. Otherwise, we use the hex representation, + // which has better compatibility with older browsers. + // Values are capped between `0` and `255`, rounded and zero-padded. + // + toCSS: function () { + if (this.alpha < 1.0) { + return "rgba(" + this.rgb.map(function (c) { + return Math.round(c); + }).concat(this.alpha).join(', ') + ")"; + } else { + return '#' + this.rgb.map(function (i) { + i = Math.round(i); + i = (i > 255 ? 255 : (i < 0 ? 0 : i)).toString(16); + return i.length === 1 ? '0' + i : i; + }).join(''); + } + }, + + // + // Operations have to be done per-channel, if not, + // channels will spill onto each other. Once we have + // our result, in the form of an integer triplet, + // we create a new Color node to hold the result. + // + operate: function (op, other) { + var result = []; + + if (! (other instanceof tree.Color)) { + other = other.toColor(); + } + + for (var c = 0; c < 3; c++) { + result[c] = tree.operate(op, this.rgb[c], other.rgb[c]); + } + return new(tree.Color)(result, this.alpha + other.alpha); + }, + + toHSL: function () { + var r = this.rgb[0] / 255, + g = this.rgb[1] / 255, + b = this.rgb[2] / 255, + a = this.alpha; + + var max = Math.max(r, g, b), min = Math.min(r, g, b); + var h, s, l = (max + min) / 2, d = max - min; + + if (max === min) { + h = s = 0; + } else { + s = l > 0.5 ? d / (2 - max - min) : d / (max + min); + + switch (max) { + case r: h = (g - b) / d + (g < b ? 6 : 0); break; + case g: h = (b - r) / d + 2; break; + case b: h = (r - g) / d + 4; break; + } + h /= 6; + } + return { h: h * 360, s: s, l: l, a: a }; + }, + toARGB: function () { + var argb = [Math.round(this.alpha * 255)].concat(this.rgb); + return '#' + argb.map(function (i) { + i = Math.round(i); + i = (i > 255 ? 255 : (i < 0 ? 0 : i)).toString(16); + return i.length === 1 ? '0' + i : i; + }).join(''); + } +}; + + +})(require('../tree')); diff --git a/bin/lib/less/tree/comment.js b/bin/lib/less/tree/comment.js new file mode 100644 index 0000000000..f4a33840dc --- /dev/null +++ b/bin/lib/less/tree/comment.js @@ -0,0 +1,14 @@ +(function (tree) { + +tree.Comment = function (value, silent) { + this.value = value; + this.silent = !!silent; +}; +tree.Comment.prototype = { + toCSS: function (env) { + return env.compress ? '' : this.value; + }, + eval: function () { return this } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/condition.js b/bin/lib/less/tree/condition.js new file mode 100644 index 0000000000..6b79dc9603 --- /dev/null +++ b/bin/lib/less/tree/condition.js @@ -0,0 +1,42 @@ +(function (tree) { + +tree.Condition = function (op, l, r, i, negate) { + this.op = op.trim(); + this.lvalue = l; + this.rvalue = r; + this.index = i; + this.negate = negate; +}; +tree.Condition.prototype.eval = function (env) { + var a = this.lvalue.eval(env), + b = this.rvalue.eval(env); + + var i = this.index, result; + + var result = (function (op) { + switch (op) { + case 'and': + return a && b; + case 'or': + return a || b; + default: + if (a.compare) { + result = a.compare(b); + } else if (b.compare) { + result = b.compare(a); + } else { + throw { type: "Type", + message: "Unable to perform comparison", + index: i }; + } + switch (result) { + case -1: return op === '<' || op === '=<'; + case 0: return op === '=' || op === '>=' || op === '=<'; + case 1: return op === '>' || op === '>='; + } + } + })(this.op); + return this.negate ? !result : result; +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/dimension.js b/bin/lib/less/tree/dimension.js new file mode 100644 index 0000000000..9a6fce3dd4 --- /dev/null +++ b/bin/lib/less/tree/dimension.js @@ -0,0 +1,49 @@ +(function (tree) { + +// +// A number with a unit +// +tree.Dimension = function (value, unit) { + this.value = parseFloat(value); + this.unit = unit || null; +}; + +tree.Dimension.prototype = { + eval: function () { return this }, + toColor: function () { + return new(tree.Color)([this.value, this.value, this.value]); + }, + toCSS: function () { + var css = this.value + this.unit; + return css; + }, + + // In an operation between two Dimensions, + // we default to the first Dimension's unit, + // so `1px + 2em` will yield `3px`. + // In the future, we could implement some unit + // conversions such that `100cm + 10mm` would yield + // `101cm`. + operate: function (op, other) { + return new(tree.Dimension) + (tree.operate(op, this.value, other.value), + this.unit || other.unit); + }, + + // TODO: Perform unit conversion before comparing + compare: function (other) { + if (other instanceof tree.Dimension) { + if (other.value > this.value) { + return -1; + } else if (other.value < this.value) { + return 1; + } else { + return 0; + } + } else { + return -1; + } + } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/directive.js b/bin/lib/less/tree/directive.js new file mode 100644 index 0000000000..27538332ac --- /dev/null +++ b/bin/lib/less/tree/directive.js @@ -0,0 +1,35 @@ +(function (tree) { + +tree.Directive = function (name, value, features) { + this.name = name; + + if (Array.isArray(value)) { + this.ruleset = new(tree.Ruleset)([], value); + this.ruleset.allowImports = true; + } else { + this.value = value; + } +}; +tree.Directive.prototype = { + toCSS: function (ctx, env) { + if (this.ruleset) { + this.ruleset.root = true; + return this.name + (env.compress ? '{' : ' {\n ') + + this.ruleset.toCSS(ctx, env).trim().replace(/\n/g, '\n ') + + (env.compress ? '}': '\n}\n'); + } else { + return this.name + ' ' + this.value.toCSS() + ';\n'; + } + }, + eval: function (env) { + env.frames.unshift(this); + this.ruleset = this.ruleset && this.ruleset.eval(env); + env.frames.shift(); + return this; + }, + variable: function (name) { return tree.Ruleset.prototype.variable.call(this.ruleset, name) }, + find: function () { return tree.Ruleset.prototype.find.apply(this.ruleset, arguments) }, + rulesets: function () { return tree.Ruleset.prototype.rulesets.apply(this.ruleset) } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/element.js b/bin/lib/less/tree/element.js new file mode 100644 index 0000000000..14b08d2ea0 --- /dev/null +++ b/bin/lib/less/tree/element.js @@ -0,0 +1,52 @@ +(function (tree) { + +tree.Element = function (combinator, value, index) { + this.combinator = combinator instanceof tree.Combinator ? + combinator : new(tree.Combinator)(combinator); + + if (typeof(value) === 'string') { + this.value = value.trim(); + } else if (value) { + this.value = value; + } else { + this.value = ""; + } + this.index = index; +}; +tree.Element.prototype.eval = function (env) { + return new(tree.Element)(this.combinator, + this.value.eval ? this.value.eval(env) : this.value, + this.index); +}; +tree.Element.prototype.toCSS = function (env) { + var value = (this.value.toCSS ? this.value.toCSS(env) : this.value); + if (value == '' && this.combinator.value.charAt(0) == '&') { + return ''; + } else { + return this.combinator.toCSS(env || {}) + value; + } +}; + +tree.Combinator = function (value) { + if (value === ' ') { + this.value = ' '; + } else if (value === '& ') { + this.value = '& '; + } else { + this.value = value ? value.trim() : ""; + } +}; +tree.Combinator.prototype.toCSS = function (env) { + return { + '' : '', + ' ' : ' ', + '&' : '', + '& ' : ' ', + ':' : ' :', + '+' : env.compress ? '+' : ' + ', + '~' : env.compress ? '~' : ' ~ ', + '>' : env.compress ? '>' : ' > ' + }[this.value]; +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/expression.js b/bin/lib/less/tree/expression.js new file mode 100644 index 0000000000..fbfa9c5b78 --- /dev/null +++ b/bin/lib/less/tree/expression.js @@ -0,0 +1,23 @@ +(function (tree) { + +tree.Expression = function (value) { this.value = value }; +tree.Expression.prototype = { + eval: function (env) { + if (this.value.length > 1) { + return new(tree.Expression)(this.value.map(function (e) { + return e.eval(env); + })); + } else if (this.value.length === 1) { + return this.value[0].eval(env); + } else { + return this; + } + }, + toCSS: function (env) { + return this.value.map(function (e) { + return e.toCSS ? e.toCSS(env) : ''; + }).join(' '); + } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/import.js b/bin/lib/less/tree/import.js new file mode 100644 index 0000000000..7a977def21 --- /dev/null +++ b/bin/lib/less/tree/import.js @@ -0,0 +1,83 @@ +(function (tree) { +// +// CSS @import node +// +// The general strategy here is that we don't want to wait +// for the parsing to be completed, before we start importing +// the file. That's because in the context of a browser, +// most of the time will be spent waiting for the server to respond. +// +// On creation, we push the import path to our import queue, though +// `import,push`, we also pass it a callback, which it'll call once +// the file has been fetched, and parsed. +// +tree.Import = function (path, imports, features, once, index) { + var that = this; + + this.once = once; + this.index = index; + this._path = path; + this.features = features && new(tree.Value)(features); + + // The '.less' extension is optional + if (path instanceof tree.Quoted) { + this.path = /\.(le?|c)ss(\?.*)?$/.test(path.value) ? path.value : path.value + '.less'; + } else { + this.path = path.value.value || path.value; + } + + this.css = /css(\?.*)?$/.test(this.path); + + // Only pre-compile .less files + if (! this.css) { + imports.push(this.path, function (e, root, imported) { + if (e) { e.index = index } + if (imported && that.once) that.skip = imported; + that.root = root || new(tree.Ruleset)([], []); + }); + } +}; + +// +// The actual import node doesn't return anything, when converted to CSS. +// The reason is that it's used at the evaluation stage, so that the rules +// it imports can be treated like any other rules. +// +// In `eval`, we make sure all Import nodes get evaluated, recursively, so +// we end up with a flat structure, which can easily be imported in the parent +// ruleset. +// +tree.Import.prototype = { + toCSS: function (env) { + var features = this.features ? ' ' + this.features.toCSS(env) : ''; + + if (this.css) { + return "@import " + this._path.toCSS() + features + ';\n'; + } else { + return ""; + } + }, + eval: function (env) { + var ruleset, features = this.features && this.features.eval(env); + + if (this.skip) return []; + + if (this.css) { + return this; + } else { + ruleset = new(tree.Ruleset)([], this.root.rules.slice(0)); + + for (var i = 0; i < ruleset.rules.length; i++) { + if (ruleset.rules[i] instanceof tree.Import) { + Array.prototype + .splice + .apply(ruleset.rules, + [i, 1].concat(ruleset.rules[i].eval(env))); + } + } + return this.features ? new(tree.Media)(ruleset.rules, this.features.value) : ruleset.rules; + } + } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/javascript.js b/bin/lib/less/tree/javascript.js new file mode 100644 index 0000000000..772a31ddd4 --- /dev/null +++ b/bin/lib/less/tree/javascript.js @@ -0,0 +1,51 @@ +(function (tree) { + +tree.JavaScript = function (string, index, escaped) { + this.escaped = escaped; + this.expression = string; + this.index = index; +}; +tree.JavaScript.prototype = { + eval: function (env) { + var result, + that = this, + context = {}; + + var expression = this.expression.replace(/@\{([\w-]+)\}/g, function (_, name) { + return tree.jsify(new(tree.Variable)('@' + name, that.index).eval(env)); + }); + + try { + expression = new(Function)('return (' + expression + ')'); + } catch (e) { + throw { message: "JavaScript evaluation error: `" + expression + "`" , + index: this.index }; + } + + for (var k in env.frames[0].variables()) { + context[k.slice(1)] = { + value: env.frames[0].variables()[k].value, + toJS: function () { + return this.value.eval(env).toCSS(); + } + }; + } + + try { + result = expression.call(context); + } catch (e) { + throw { message: "JavaScript evaluation error: '" + e.name + ': ' + e.message + "'" , + index: this.index }; + } + if (typeof(result) === 'string') { + return new(tree.Quoted)('"' + result + '"', result, this.escaped, this.index); + } else if (Array.isArray(result)) { + return new(tree.Anonymous)(result.join(', ')); + } else { + return new(tree.Anonymous)(result); + } + } +}; + +})(require('../tree')); + diff --git a/bin/lib/less/tree/keyword.js b/bin/lib/less/tree/keyword.js new file mode 100644 index 0000000000..701b79e571 --- /dev/null +++ b/bin/lib/less/tree/keyword.js @@ -0,0 +1,19 @@ +(function (tree) { + +tree.Keyword = function (value) { this.value = value }; +tree.Keyword.prototype = { + eval: function () { return this }, + toCSS: function () { return this.value }, + compare: function (other) { + if (other instanceof tree.Keyword) { + return other.value === this.value ? 0 : 1; + } else { + return -1; + } + } +}; + +tree.True = new(tree.Keyword)('true'); +tree.False = new(tree.Keyword)('false'); + +})(require('../tree')); diff --git a/bin/lib/less/tree/media.js b/bin/lib/less/tree/media.js new file mode 100644 index 0000000000..2b7b26e585 --- /dev/null +++ b/bin/lib/less/tree/media.js @@ -0,0 +1,114 @@ +(function (tree) { + +tree.Media = function (value, features) { + var el = new(tree.Element)('&', null, 0), + selectors = [new(tree.Selector)([el])]; + + this.features = new(tree.Value)(features); + this.ruleset = new(tree.Ruleset)(selectors, value); + this.ruleset.allowImports = true; +}; +tree.Media.prototype = { + toCSS: function (ctx, env) { + var features = this.features.toCSS(env); + + this.ruleset.root = (ctx.length === 0 || ctx[0].multiMedia); + return '@media ' + features + (env.compress ? '{' : ' {\n ') + + this.ruleset.toCSS(ctx, env).trim().replace(/\n/g, '\n ') + + (env.compress ? '}': '\n}\n'); + }, + eval: function (env) { + if (!env.mediaBlocks) { + env.mediaBlocks = []; + env.mediaPath = []; + } + + var blockIndex = env.mediaBlocks.length; + env.mediaPath.push(this); + env.mediaBlocks.push(this); + + var media = new(tree.Media)([], []); + media.features = this.features.eval(env); + + env.frames.unshift(this.ruleset); + media.ruleset = this.ruleset.eval(env); + env.frames.shift(); + + env.mediaBlocks[blockIndex] = media; + env.mediaPath.pop(); + + return env.mediaPath.length === 0 ? media.evalTop(env) : + media.evalNested(env) + }, + variable: function (name) { return tree.Ruleset.prototype.variable.call(this.ruleset, name) }, + find: function () { return tree.Ruleset.prototype.find.apply(this.ruleset, arguments) }, + rulesets: function () { return tree.Ruleset.prototype.rulesets.apply(this.ruleset) }, + + evalTop: function (env) { + var result = this; + + // Render all dependent Media blocks. + if (env.mediaBlocks.length > 1) { + var el = new(tree.Element)('&', null, 0); + var selectors = [new(tree.Selector)([el])]; + result = new(tree.Ruleset)(selectors, env.mediaBlocks); + result.multiMedia = true; + } + + delete env.mediaBlocks; + delete env.mediaPath; + + return result; + }, + evalNested: function (env) { + var i, value, + path = env.mediaPath.concat([this]); + + // Extract the media-query conditions separated with `,` (OR). + for (i = 0; i < path.length; i++) { + value = path[i].features instanceof tree.Value ? + path[i].features.value : path[i].features; + path[i] = Array.isArray(value) ? value : [value]; + } + + // Trace all permutations to generate the resulting media-query. + // + // (a, b and c) with nested (d, e) -> + // a and d + // a and e + // b and c and d + // b and c and e + this.features = new(tree.Value)(this.permute(path).map(function (path) { + path = path.map(function (fragment) { + return fragment.toCSS ? fragment : new(tree.Anonymous)(fragment); + }); + + for(i = path.length - 1; i > 0; i--) { + path.splice(i, 0, new(tree.Anonymous)("and")); + } + + return new(tree.Expression)(path); + })); + + // Fake a tree-node that doesn't output anything. + return new(tree.Ruleset)([], []); + }, + permute: function (arr) { + if (arr.length === 0) { + return []; + } else if (arr.length === 1) { + return arr[0]; + } else { + var result = []; + var rest = this.permute(arr.slice(1)); + for (var i = 0; i < rest.length; i++) { + for (var j = 0; j < arr[0].length; j++) { + result.push([arr[0][j]].concat(rest[i])); + } + } + return result; + } + } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/mixin.js b/bin/lib/less/tree/mixin.js new file mode 100644 index 0000000000..b441bf3b23 --- /dev/null +++ b/bin/lib/less/tree/mixin.js @@ -0,0 +1,146 @@ +(function (tree) { + +tree.mixin = {}; +tree.mixin.Call = function (elements, args, index, filename, important) { + this.selector = new(tree.Selector)(elements); + this.arguments = args; + this.index = index; + this.filename = filename; + this.important = important; +}; +tree.mixin.Call.prototype = { + eval: function (env) { + var mixins, args, rules = [], match = false; + + for (var i = 0; i < env.frames.length; i++) { + if ((mixins = env.frames[i].find(this.selector)).length > 0) { + args = this.arguments && this.arguments.map(function (a) { + return { name: a.name, value: a.value.eval(env) }; + }); + for (var m = 0; m < mixins.length; m++) { + if (mixins[m].match(args, env)) { + try { + Array.prototype.push.apply( + rules, mixins[m].eval(env, this.arguments, this.important).rules); + match = true; + } catch (e) { + throw { message: e.message, index: this.index, filename: this.filename, stack: e.stack }; + } + } + } + if (match) { + return rules; + } else { + throw { type: 'Runtime', + message: 'No matching definition was found for `' + + this.selector.toCSS().trim() + '(' + + this.arguments.map(function (a) { + return a.toCSS(); + }).join(', ') + ")`", + index: this.index, filename: this.filename }; + } + } + } + throw { type: 'Name', + message: this.selector.toCSS().trim() + " is undefined", + index: this.index, filename: this.filename }; + } +}; + +tree.mixin.Definition = function (name, params, rules, condition, variadic) { + this.name = name; + this.selectors = [new(tree.Selector)([new(tree.Element)(null, name)])]; + this.params = params; + this.condition = condition; + this.variadic = variadic; + this.arity = params.length; + this.rules = rules; + this._lookups = {}; + this.required = params.reduce(function (count, p) { + if (!p.name || (p.name && !p.value)) { return count + 1 } + else { return count } + }, 0); + this.parent = tree.Ruleset.prototype; + this.frames = []; +}; +tree.mixin.Definition.prototype = { + toCSS: function () { return "" }, + variable: function (name) { return this.parent.variable.call(this, name) }, + variables: function () { return this.parent.variables.call(this) }, + find: function () { return this.parent.find.apply(this, arguments) }, + rulesets: function () { return this.parent.rulesets.apply(this) }, + + evalParams: function (env, args) { + var frame = new(tree.Ruleset)(null, []), varargs, arg; + + for (var i = 0, val, name; i < this.params.length; i++) { + arg = args && args[i] + + if (arg && arg.name) { + frame.rules.unshift(new(tree.Rule)(arg.name, arg.value.eval(env))); + args.splice(i, 1); + i--; + continue; + } + + if (name = this.params[i].name) { + if (this.params[i].variadic && args) { + varargs = []; + for (var j = i; j < args.length; j++) { + varargs.push(args[j].value.eval(env)); + } + frame.rules.unshift(new(tree.Rule)(name, new(tree.Expression)(varargs).eval(env))); + } else if (val = (arg && arg.value) || this.params[i].value) { + frame.rules.unshift(new(tree.Rule)(name, val.eval(env))); + } else { + throw { type: 'Runtime', message: "wrong number of arguments for " + this.name + + ' (' + args.length + ' for ' + this.arity + ')' }; + } + } + } + return frame; + }, + eval: function (env, args, important) { + var frame = this.evalParams(env, args), context, _arguments = [], rules, start; + + for (var i = 0; i < Math.max(this.params.length, args && args.length); i++) { + _arguments.push((args[i] && args[i].value) || this.params[i].value); + } + frame.rules.unshift(new(tree.Rule)('@arguments', new(tree.Expression)(_arguments).eval(env))); + + rules = important ? + this.rules.map(function (r) { + return new(tree.Rule)(r.name, r.value, '!important', r.index); + }) : this.rules.slice(0); + + return new(tree.Ruleset)(null, rules).eval({ + frames: [this, frame].concat(this.frames, env.frames) + }); + }, + match: function (args, env) { + var argsLength = (args && args.length) || 0, len, frame; + + if (! this.variadic) { + if (argsLength < this.required) { return false } + if (argsLength > this.params.length) { return false } + if ((this.required > 0) && (argsLength > this.params.length)) { return false } + } + + if (this.condition && !this.condition.eval({ + frames: [this.evalParams(env, args)].concat(env.frames) + })) { return false } + + len = Math.min(argsLength, this.arity); + + for (var i = 0; i < len; i++) { + if (!this.params[i].name) { + if (args[i].value.eval(env).toCSS() != this.params[i].value.eval(env).toCSS()) { + return false; + } + } + } + return true; + } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/operation.js b/bin/lib/less/tree/operation.js new file mode 100644 index 0000000000..1ce22fb047 --- /dev/null +++ b/bin/lib/less/tree/operation.js @@ -0,0 +1,32 @@ +(function (tree) { + +tree.Operation = function (op, operands) { + this.op = op.trim(); + this.operands = operands; +}; +tree.Operation.prototype.eval = function (env) { + var a = this.operands[0].eval(env), + b = this.operands[1].eval(env), + temp; + + if (a instanceof tree.Dimension && b instanceof tree.Color) { + if (this.op === '*' || this.op === '+') { + temp = b, b = a, a = temp; + } else { + throw { name: "OperationError", + message: "Can't substract or divide a color from a number" }; + } + } + return a.operate(this.op, b); +}; + +tree.operate = function (op, a, b) { + switch (op) { + case '+': return a + b; + case '-': return a - b; + case '*': return a * b; + case '/': return a / b; + } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/paren.js b/bin/lib/less/tree/paren.js new file mode 100644 index 0000000000..384a43c74c --- /dev/null +++ b/bin/lib/less/tree/paren.js @@ -0,0 +1,16 @@ + +(function (tree) { + +tree.Paren = function (node) { + this.value = node; +}; +tree.Paren.prototype = { + toCSS: function (env) { + return '(' + this.value.toCSS(env) + ')'; + }, + eval: function (env) { + return new(tree.Paren)(this.value.eval(env)); + } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/quoted.js b/bin/lib/less/tree/quoted.js new file mode 100644 index 0000000000..794bf4ceab --- /dev/null +++ b/bin/lib/less/tree/quoted.js @@ -0,0 +1,29 @@ +(function (tree) { + +tree.Quoted = function (str, content, escaped, i) { + this.escaped = escaped; + this.value = content || ''; + this.quote = str.charAt(0); + this.index = i; +}; +tree.Quoted.prototype = { + toCSS: function () { + if (this.escaped) { + return this.value; + } else { + return this.quote + this.value + this.quote; + } + }, + eval: function (env) { + var that = this; + var value = this.value.replace(/`([^`]+)`/g, function (_, exp) { + return new(tree.JavaScript)(exp, that.index, true).eval(env).value; + }).replace(/@\{([\w-]+)\}/g, function (_, name) { + var v = new(tree.Variable)('@' + name, that.index).eval(env); + return ('value' in v) ? v.value : v.toCSS(); + }); + return new(tree.Quoted)(this.quote + value + this.quote, value, this.escaped, this.index); + } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/rule.js b/bin/lib/less/tree/rule.js new file mode 100644 index 0000000000..9e4e54a3a7 --- /dev/null +++ b/bin/lib/less/tree/rule.js @@ -0,0 +1,42 @@ +(function (tree) { + +tree.Rule = function (name, value, important, index, inline) { + this.name = name; + this.value = (value instanceof tree.Value) ? value : new(tree.Value)([value]); + this.important = important ? ' ' + important.trim() : ''; + this.index = index; + this.inline = inline || false; + + if (name.charAt(0) === '@') { + this.variable = true; + } else { this.variable = false } +}; +tree.Rule.prototype.toCSS = function (env) { + if (this.variable) { return "" } + else { + return this.name + (env.compress ? ':' : ': ') + + this.value.toCSS(env) + + this.important + (this.inline ? "" : ";"); + } +}; + +tree.Rule.prototype.eval = function (context) { + return new(tree.Rule)(this.name, + this.value.eval(context), + this.important, + this.index, this.inline); +}; + +tree.Shorthand = function (a, b) { + this.a = a; + this.b = b; +}; + +tree.Shorthand.prototype = { + toCSS: function (env) { + return this.a.toCSS(env) + "/" + this.b.toCSS(env); + }, + eval: function () { return this } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/ruleset.js b/bin/lib/less/tree/ruleset.js new file mode 100644 index 0000000000..3100cc354a --- /dev/null +++ b/bin/lib/less/tree/ruleset.js @@ -0,0 +1,225 @@ +(function (tree) { + +tree.Ruleset = function (selectors, rules, strictImports) { + this.selectors = selectors; + this.rules = rules; + this._lookups = {}; + this.strictImports = strictImports; +}; +tree.Ruleset.prototype = { + eval: function (env) { + var selectors = this.selectors && this.selectors.map(function (s) { return s.eval(env) }); + var ruleset = new(tree.Ruleset)(selectors, this.rules.slice(0), this.strictImports); + + ruleset.root = this.root; + ruleset.allowImports = this.allowImports; + + // push the current ruleset to the frames stack + env.frames.unshift(ruleset); + + // Evaluate imports + if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) { + for (var i = 0; i < ruleset.rules.length; i++) { + if (ruleset.rules[i] instanceof tree.Import) { + Array.prototype.splice + .apply(ruleset.rules, [i, 1].concat(ruleset.rules[i].eval(env))); + } + } + } + + // Store the frames around mixin definitions, + // so they can be evaluated like closures when the time comes. + for (var i = 0; i < ruleset.rules.length; i++) { + if (ruleset.rules[i] instanceof tree.mixin.Definition) { + ruleset.rules[i].frames = env.frames.slice(0); + } + } + + // Evaluate mixin calls. + for (var i = 0; i < ruleset.rules.length; i++) { + if (ruleset.rules[i] instanceof tree.mixin.Call) { + Array.prototype.splice + .apply(ruleset.rules, [i, 1].concat(ruleset.rules[i].eval(env))); + } + } + + // Evaluate everything else + for (var i = 0, rule; i < ruleset.rules.length; i++) { + rule = ruleset.rules[i]; + + if (! (rule instanceof tree.mixin.Definition)) { + ruleset.rules[i] = rule.eval ? rule.eval(env) : rule; + } + } + + // Pop the stack + env.frames.shift(); + + return ruleset; + }, + match: function (args) { + return !args || args.length === 0; + }, + variables: function () { + if (this._variables) { return this._variables } + else { + return this._variables = this.rules.reduce(function (hash, r) { + if (r instanceof tree.Rule && r.variable === true) { + hash[r.name] = r; + } + return hash; + }, {}); + } + }, + variable: function (name) { + return this.variables()[name]; + }, + rulesets: function () { + if (this._rulesets) { return this._rulesets } + else { + return this._rulesets = this.rules.filter(function (r) { + return (r instanceof tree.Ruleset) || (r instanceof tree.mixin.Definition); + }); + } + }, + find: function (selector, self) { + self = self || this; + var rules = [], rule, match, + key = selector.toCSS(); + + if (key in this._lookups) { return this._lookups[key] } + + this.rulesets().forEach(function (rule) { + if (rule !== self) { + for (var j = 0; j < rule.selectors.length; j++) { + if (match = selector.match(rule.selectors[j])) { + if (selector.elements.length > rule.selectors[j].elements.length) { + Array.prototype.push.apply(rules, rule.find( + new(tree.Selector)(selector.elements.slice(1)), self)); + } else { + rules.push(rule); + } + break; + } + } + } + }); + return this._lookups[key] = rules; + }, + // + // Entry point for code generation + // + // `context` holds an array of arrays. + // + toCSS: function (context, env) { + var css = [], // The CSS output + rules = [], // node.Rule instances + _rules = [], // + rulesets = [], // node.Ruleset instances + paths = [], // Current selectors + selector, // The fully rendered selector + rule; + + if (! this.root) { + if (context.length === 0) { + paths = this.selectors.map(function (s) { return [s] }); + } else { + this.joinSelectors(paths, context, this.selectors); + } + } + + // Compile rules and rulesets + for (var i = 0; i < this.rules.length; i++) { + rule = this.rules[i]; + + if (rule.rules || (rule instanceof tree.Directive) || (rule instanceof tree.Media)) { + rulesets.push(rule.toCSS(paths, env)); + } else if (rule instanceof tree.Comment) { + if (!rule.silent) { + if (this.root) { + rulesets.push(rule.toCSS(env)); + } else { + rules.push(rule.toCSS(env)); + } + } + } else { + if (rule.toCSS && !rule.variable) { + rules.push(rule.toCSS(env)); + } else if (rule.value && !rule.variable) { + rules.push(rule.value.toString()); + } + } + } + + rulesets = rulesets.join(''); + + // If this is the root node, we don't render + // a selector, or {}. + // Otherwise, only output if this ruleset has rules. + if (this.root) { + css.push(rules.join(env.compress ? '' : '\n')); + } else { + if (rules.length > 0) { + selector = paths.map(function (p) { + return p.map(function (s) { + return s.toCSS(env); + }).join('').trim(); + }).join(env.compress ? ',' : ',\n'); + + // Remove duplicates + for (var i = rules.length - 1; i >= 0; i--) { + if (_rules.indexOf(rules[i]) === -1) { + _rules.unshift(rules[i]); + } + } + rules = _rules; + + css.push(selector, + (env.compress ? '{' : ' {\n ') + + rules.join(env.compress ? '' : '\n ') + + (env.compress ? '}' : '\n}\n')); + } + } + css.push(rulesets); + + return css.join('') + (env.compress ? '\n' : ''); + }, + + joinSelectors: function (paths, context, selectors) { + for (var s = 0; s < selectors.length; s++) { + this.joinSelector(paths, context, selectors[s]); + } + }, + + joinSelector: function (paths, context, selector) { + var before = [], after = [], beforeElements = [], + afterElements = [], hasParentSelector = false, el; + + for (var i = 0; i < selector.elements.length; i++) { + el = selector.elements[i]; + if (el.combinator.value.charAt(0) === '&') { + hasParentSelector = true; + } + if (hasParentSelector) afterElements.push(el); + else beforeElements.push(el); + } + + if (! hasParentSelector) { + afterElements = beforeElements; + beforeElements = []; + } + + if (beforeElements.length > 0) { + before.push(new(tree.Selector)(beforeElements)); + } + + if (afterElements.length > 0) { + after.push(new(tree.Selector)(afterElements)); + } + + for (var c = 0; c < context.length; c++) { + paths.push(before.concat(context[c]).concat(after)); + } + } +}; +})(require('../tree')); diff --git a/bin/lib/less/tree/selector.js b/bin/lib/less/tree/selector.js new file mode 100644 index 0000000000..65abbb692d --- /dev/null +++ b/bin/lib/less/tree/selector.js @@ -0,0 +1,42 @@ +(function (tree) { + +tree.Selector = function (elements) { + this.elements = elements; + if (this.elements[0].combinator.value === "") { + this.elements[0].combinator.value = ' '; + } +}; +tree.Selector.prototype.match = function (other) { + var len = this.elements.length, + olen = other.elements.length, + max = Math.min(len, olen); + + if (len < olen) { + return false; + } else { + for (var i = 0; i < max; i++) { + if (this.elements[i].value !== other.elements[i].value) { + return false; + } + } + } + return true; +}; +tree.Selector.prototype.eval = function (env) { + return new(tree.Selector)(this.elements.map(function (e) { + return e.eval(env); + })); +}; +tree.Selector.prototype.toCSS = function (env) { + if (this._css) { return this._css } + + return this._css = this.elements.map(function (e) { + if (typeof(e) === 'string') { + return ' ' + e.trim(); + } else { + return e.toCSS(env); + } + }).join(''); +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/url.js b/bin/lib/less/tree/url.js new file mode 100644 index 0000000000..0caec34581 --- /dev/null +++ b/bin/lib/less/tree/url.js @@ -0,0 +1,25 @@ +(function (tree) { + +tree.URL = function (val, paths) { + if (val.data) { + this.attrs = val; + } else { + // Add the base path if the URL is relative and we are in the browser + if (typeof(window) !== 'undefined' && !/^(?:https?:\/\/|file:\/\/|data:|\/)/.test(val.value) && paths.length > 0) { + val.value = paths[0] + (val.value.charAt(0) === '/' ? val.value.slice(1) : val.value); + } + this.value = val; + this.paths = paths; + } +}; +tree.URL.prototype = { + toCSS: function () { + return "url(" + (this.attrs ? 'data:' + this.attrs.mime + this.attrs.charset + this.attrs.base64 + this.attrs.data + : this.value.toCSS()) + ")"; + }, + eval: function (ctx) { + return this.attrs ? this : new(tree.URL)(this.value.eval(ctx), this.paths); + } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/value.js b/bin/lib/less/tree/value.js new file mode 100644 index 0000000000..3c1eb29a22 --- /dev/null +++ b/bin/lib/less/tree/value.js @@ -0,0 +1,24 @@ +(function (tree) { + +tree.Value = function (value) { + this.value = value; + this.is = 'value'; +}; +tree.Value.prototype = { + eval: function (env) { + if (this.value.length === 1) { + return this.value[0].eval(env); + } else { + return new(tree.Value)(this.value.map(function (v) { + return v.eval(env); + })); + } + }, + toCSS: function (env) { + return this.value.map(function (e) { + return e.toCSS(env); + }).join(env.compress ? ',' : ', '); + } +}; + +})(require('../tree')); diff --git a/bin/lib/less/tree/variable.js b/bin/lib/less/tree/variable.js new file mode 100644 index 0000000000..ee557e1df5 --- /dev/null +++ b/bin/lib/less/tree/variable.js @@ -0,0 +1,26 @@ +(function (tree) { + +tree.Variable = function (name, index, file) { this.name = name, this.index = index, this.file = file }; +tree.Variable.prototype = { + eval: function (env) { + var variable, v, name = this.name; + + if (name.indexOf('@@') == 0) { + name = '@' + new(tree.Variable)(name.slice(1)).eval(env).value; + } + + if (variable = tree.find(env.frames, function (frame) { + if (v = frame.variable(name)) { + return v.value.eval(env); + } + })) { return variable } + else { + throw { type: 'Name', + message: "variable " + name + " is undefined", + filename: this.file, + index: this.index }; + } + } +}; + +})(require('../tree'));