Return-Path: X-Original-To: apmail-couchdb-commits-archive@www.apache.org Delivered-To: apmail-couchdb-commits-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 4693E10C78 for ; Mon, 8 Jul 2013 16:00:02 +0000 (UTC) Received: (qmail 22621 invoked by uid 500); 8 Jul 2013 15:59:57 -0000 Delivered-To: apmail-couchdb-commits-archive@couchdb.apache.org Received: (qmail 22021 invoked by uid 500); 8 Jul 2013 15:59:56 -0000 Mailing-List: contact commits-help@couchdb.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@couchdb.apache.org Delivered-To: mailing list commits@couchdb.apache.org Received: (qmail 21454 invoked by uid 99); 8 Jul 2013 15:59:55 -0000 Received: from tyr.zones.apache.org (HELO tyr.zones.apache.org) (140.211.11.114) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 08 Jul 2013 15:59:55 +0000 Received: by tyr.zones.apache.org (Postfix, from userid 65534) id 17E4688597A; Mon, 8 Jul 2013 15:59:55 +0000 (UTC) Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: garren@apache.org To: commits@couchdb.apache.org Date: Mon, 08 Jul 2013 16:00:05 -0000 Message-Id: <88838ea01ecb4b509f96b84bb4bcf994@git.apache.org> In-Reply-To: References: X-Mailer: ASF-Git Admin Mailer Subject: [12/21] working with less and css http://git-wip-us.apache.org/repos/asf/couchdb/blob/4d06c100/src/fauxton/assets/js/plugins/require-less/lessc.js ---------------------------------------------------------------------- diff --git a/src/fauxton/assets/js/plugins/require-less/lessc.js b/src/fauxton/assets/js/plugins/require-less/lessc.js new file mode 100644 index 0000000..d22e77e --- /dev/null +++ b/src/fauxton/assets/js/plugins/require-less/lessc.js @@ -0,0 +1,4441 @@ +//requirejs server changes - +// typeof window === 'undefined' ? undefined : window on window inclusion. +// changed require stub on line 17 +// line 3232: if (typeof window === 'undefined') return; + +// +// LESS - Leaner CSS v1.3.0 +// http://lesscss.org +// +// Copyright (c) 2009-2011, Alexis Sellier +// Licensed under the Apache 2.0 License. +// + + +(function (root, factory) { + if (typeof define === 'function' && define.amd) { + // AMD. Register as an anonymous module. + define(factory); + } else { + // Browser globals + window.less = factory(); + } +}(this, function() { +// +// LESS - Leaner CSS v1.3.3 +// http://lesscss.org +// +// Copyright (c) 2009-2013, Alexis Sellier +// Licensed under the Apache 2.0 License. +// + +// +// Stub out `require` in the browser +// +/* function require(arg) { + return window.less[arg.split('/')[1]]; +}; */ +function require(arg) { + if (arg == './tree' || arg == '../tree') { + if (tree === undefined) + tree = {}; + return tree; + } + else + return less[arg.split('/')[1]]; +} + + +// ecma-5.js +// +// -- kriskowal Kris Kowal Copyright (C) 2009-2010 MIT License +// -- tlrobinson Tom Robinson +// dantman Daniel Friesen + +// +// Array +// +if (!Array.isArray) { + Array.isArray = function(obj) { + return Object.prototype.toString.call(obj) === "[object Array]" || + (obj instanceof Array); + }; +} +if (!Array.prototype.forEach) { + Array.prototype.forEach = function(block, thisObject) { + var len = this.length >>> 0; + for (var i = 0; i < len; i++) { + if (i in this) { + block.call(thisObject, this[i], i, this); + } + } + }; +} +if (!Array.prototype.map) { + Array.prototype.map = function(fun /*, thisp*/) { + var len = this.length >>> 0; + var res = new Array(len); + var thisp = arguments[1]; + + for (var i = 0; i < len; i++) { + if (i in this) { + res[i] = fun.call(thisp, this[i], i, this); + } + } + return res; + }; +} +if (!Array.prototype.filter) { + Array.prototype.filter = function (block /*, thisp */) { + var values = []; + var thisp = arguments[1]; + for (var i = 0; i < this.length; i++) { + if (block.call(thisp, this[i])) { + values.push(this[i]); + } + } + return values; + }; +} +if (!Array.prototype.reduce) { + Array.prototype.reduce = function(fun /*, initial*/) { + var len = this.length >>> 0; + var i = 0; + + // no value to return if no initial value and an empty array + if (len === 0 && arguments.length === 1) throw new TypeError(); + + if (arguments.length >= 2) { + var rv = arguments[1]; + } else { + do { + if (i in this) { + rv = this[i++]; + break; + } + // if array contains no values, no initial value to return + if (++i >= len) throw new TypeError(); + } while (true); + } + for (; i < len; i++) { + if (i in this) { + rv = fun.call(null, rv, this[i], i, this); + } + } + return rv; + }; +} +if (!Array.prototype.indexOf) { + Array.prototype.indexOf = function (value /*, fromIndex */ ) { + var length = this.length; + var i = arguments[1] || 0; + + if (!length) return -1; + if (i >= length) return -1; + if (i < 0) i += length; + + for (; i < length; i++) { + if (!Object.prototype.hasOwnProperty.call(this, i)) { continue } + if (value === this[i]) return i; + } + return -1; + }; +} + +// +// Object +// +if (!Object.keys) { + Object.keys = function (object) { + var keys = []; + for (var name in object) { + if (Object.prototype.hasOwnProperty.call(object, name)) { + keys.push(name); + } + } + return keys; + }; +} + +// +// String +// +if (!String.prototype.trim) { + String.prototype.trim = function () { + return String(this).replace(/^\s\s*/, '').replace(/\s\s*$/, ''); + }; +} +var less, tree, charset; +if (typeof environment === "object" && ({}).toString.call(environment) === "[object Environment]") { + // Rhino + // Details on how to detect Rhino: https://github.com/ringo/ringojs/issues/88 + if (typeof(window) === 'undefined') { less = {} } + else { less = window.less = {} } + tree = less.tree = {}; + less.mode = 'rhino'; +} else if (typeof(window) === 'undefined') { + // Node.js + less = typeof exports != 'undefined' ? exports : {}, + tree = require('./tree'); + less.mode = 'node'; +} else { + // Browser + if (typeof(window.less) === 'undefined') { window.less = {} } + less = window.less, + tree = window.less.tree = {}; + less.mode = 'browser'; +} +// +// less.js - parser +// +// A relatively straight-forward predictive parser. +// There is no tokenization/lexing stage, the input is parsed +// in one sweep. +// +// To make the parser fast enough to run in the browser, several +// optimization had to be made: +// +// - Matching and slicing on a huge input is often cause of slowdowns. +// The solution is to chunkify the input into smaller strings. +// The chunks are stored in the `chunks` var, +// `j` holds the current chunk index, and `current` holds +// the index of the current chunk in relation to `input`. +// This gives us an almost 4x speed-up. +// +// - In many cases, we don't need to match individual tokens; +// for example, if a value doesn't hold any variables, operations +// or dynamic references, the parser can effectively 'skip' it, +// treating it as a literal. +// An example would be '1px solid #000' - which evaluates to itself, +// we don't need to know what the individual components are. +// The drawback, of course is that you don't get the benefits of +// syntax-checking on the CSS. This gives us a 50% speed-up in the parser, +// and a smaller speed-up in the code-gen. +// +// +// Token matching is done with the `$` 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; + + // Top parser on an import tree must be sure there is one "env" + // which will then be passed arround by reference. + var env = env || { }; + // env.contents and files must be passed arround with top env + if (!env.contents) { env.contents = {}; } + env.rootpath = env.rootpath || ''; // env.rootpath must be initialized to '' if not provided + if (!env.files) { env.files = {}; } + + // This function is called after all files + // have been imported through `@import`. + var finish = function () {}; + + var imports = this.imports = { + paths: env.paths || [], // Search paths, when importing + queue: [], // Files which haven't been imported yet + files: env.files, // Holds the imported parse trees + contents: env.contents, // Holds the imported file contents + mime: 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, fullPath) { + that.queue.splice(that.queue.indexOf(path), 1); // Remove the path from the queue + + var imported = fullPath in that.files; + + that.files[fullPath] = root; // Store the root + + if (e && !that.error) { that.error = e } + + callback(e, root, imported); + + if (that.queue.length === 0) { finish(that.error) } // 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; + } + } + function isWhitespace(c) { + // Could change to \s? + var code = c.charCodeAt(0); + return code === 32 || code === 10 || code === 9; + } + // + // Parse from a token, regexp or string, and move forward if match + // + function $(tok) { + var match, args, length, index, k; + + // + // 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) { + skipWhitespace(length); + + if(typeof(match) === 'string') { + return match; + } else { + return match.length === 1 ? match[0] : match; + } + } + } + + function skipWhitespace(length) { + var oldi = i, oldj = j, + endIndex = i + chunks[j].length, + mem = i += length; + + while (i < endIndex) { + if (! isWhitespace(input.charAt(i))) { break } + i++; + } + chunks[j] = chunks[j].slice(length + (i - mem)); + current = i; + + if (chunks[j].length === 0 && j < chunks.length - 1) { j++ } + + return oldi !== i || oldj !== j; + } + + 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) { + var e = new Error(msg); + e.index = i; + e.type = type || 'Syntax'; + throw e; + } + + // 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 getInput(e, env) { + if (e.filename && env.filename && (e.filename !== env.filename)) { + return parser.imports.contents[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 getFileName(e) { + if(less.mode === 'browser' || less.mode === 'rhino') + return e.filename; + else + return require('path').resolve(e.filename); + } + + function getDebugInfo(index, inputStream, e) { + return { + lineNumber: getLocation(index, inputStream).line + 1, + fileName: getFileName(e) + }; + } + + 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'); + + // Remove potential UTF Byte Order Mark + input = input.replace(/^\uFEFF/, ''); + + // Split the input into chunks. + chunks = (function (chunks) { + var j = 0, + skip = /(?:@\{[\w-]+\}|[^"'`\{\}\/\(\)\\])+/g, + comment = /\/\*(?:[^*]|\*+[^\/*])*\*+\/|\/\/.*/g, + string = /"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'|`((?:[^`]|\\.)*)`/g, + level = 0, + match, + chunk = chunks[0], + inParam; + + for (var i = 0, c, cc; i < input.length;) { + 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]); + continue; + } + } + + 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]); + continue; + } + } + } + } + + 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); + } + + i++; + } + if (level != 0) { + error = new(LessError)({ + index: i-1, + type: 'Parse', + message: (level > 0) ? "missing closing `}`" : "missing opening `{`", + filename: env.filename + }, env); + } + + return chunks.map(function (c) { return c.join('') });; + })([[]]); + + if (error) { + return callback(error, env); + } + + // 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, dumpLineNumbers: env.dumpLineNumbers }); + } 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('ycssmin').cssmin(css); + } else if (options.compress) { + return css.replace(/(\s)+/g, "$1"); + } else { + return css; + } + }; + })(root.eval); + + // If `i` is smaller than the `input.length - 1`, + // it means the parser wasn't able to parse the whole + // string, so we've got a parsing error. + // + // We try to extract a \n delimited string, + // showing the line where the parse error occured. + // We split it up into two parts (the part which parsed, + // and the part which didn't), so we can color them differently. + if (i < input.length - 1) { + i = furthest; + lines = input.split('\n'); + line = (input.slice(0, i).match(/\n/g) || "").length + 1; + + for (var n = i, column = -1; n >= 0 && input.charAt(n) !== '\n'; n--) { column++ } + + error = { + type: "Parse", + message: "Syntax Error on line " + line, + index: i, + filename: env.filename, + line: line, + column: column, + extract: [ + lines[line - 2], + lines[line - 1], + lines[line] + ] + }; + } + + if (this.imports.queue.length > 0) { + finish = function (e) { + e = error || e; + if (e) callback(e); + else callback(null, root); + }; + } else { + callback(error, root); + } + }, + + // + // Here in, the parsing rules/functions + // + // The basic structure of the syntax tree generated is as follows: + // + // Ruleset -> Rule -> Value -> Expression -> Entity + // + // Here's some LESS code: + // + // .class { + // color: #fff; + // border: 1px solid #000; + // width: @w + 4px; + // > .child {...} + // } + // + // And here's what the parse tree might look like: + // + // Ruleset (Selector '.class', [ + // Rule ("color", Value ([Expression [Color #fff]])) + // Rule ("border", Value ([Expression [Dimension 1px][Keyword "solid"][Color #000]])) + // Rule ("width", Value ([Expression [Operation "+" [Variable "@w"][Dimension 4px]]])) + // Ruleset (Selector [Element '>', '.child'], [...]) + // ]) + // + // In general, most rules will try to parse a token with the `$()` 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, nameLC, args, alpha_ret, index = i; + + if (! (name = /^([\w-]+|%|progid:[\w\.]+)\(/.exec(chunks[j]))) return; + + name = name[1]; + nameLC = name.toLowerCase(); + + if (nameLC === 'url') { return null } + else { i += name.length } + + if (nameLC === 'alpha') { + alpha_ret = $(this.alpha); + if(typeof alpha_ret !== 'undefined') { + return alpha_ret; + } + } + + $('('); // 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.ratio) || + $(this.entities.dimension) || + $(this.entities.color) || + $(this.entities.quoted) || + $(this.entities.unicodeDescriptor); + }, + + // 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) || + $(/^(?:(?:\\[\(\)'"])|[^\(\)'"])+/) || ""; + + expect(')'); + + return new(tree.URL)((value.value != null || value instanceof tree.Variable) + ? value : new(tree.Anonymous)(value), env.rootpath); + }, + + // + // 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 variable entity useing the protective {} e.g. @{var} + variableCurly: function () { + var name, curly, index = i; + + if (input.charAt(i) === '@' && (curly = $(/^@\{([\w-]+)\}/))) { + return new(tree.Variable)("@" + curly[1], 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); + //Is the first char of the dimension 0-9, '.', '+' or '-' + if ((c > 57 || c < 43) || c === 47 || c == 44) return; + + if (value = $(/^([+-]?\d*\.?\d+)(px|%|em|pc|ex|in|deg|s|ms|pt|cm|mm|rad|grad|turn|dpi|dpcm|dppx|rem|vw|vh|vmin|vm|ch)?/)) { + return new(tree.Dimension)(value[1], value[2]); + } + }, + + // + // A Ratio + // + // 16/9 + // + ratio: function () { + var value, c = input.charCodeAt(i); + if (c > 57 || c < 48) return; + + if (value = $(/^(\d+\/\d+)/)) { + return new(tree.Ratio)(value[1]); + } + }, + + // + // A unicode descriptor, as is used in unicode-range + // + // U+0?? or U+00A1-00A9 + // + unicodeDescriptor: function () { + var ud; + + if (ud = $(/^U\+[0-9a-fA-F?]+(\-[0-9a-fA-F?]+)?/)) { + return new(tree.UnicodeDescriptor)(ud[0]); + } + }, + + // + // 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; + + save(); + + if ((a = $(this.entity)) && $('/') && (b = $(this.entity))) { + return new(tree.Shorthand)(a, b); + } + + restore(); + }, + + // + // 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, argsSemiColon = [], argsComma = [], args, delim, arg, nameLoop, expressions, isSemiColonSeperated, expressionContainsNamed, index = i, s = input.charAt(i), name, value, important = false; + + if (s !== '.' && s !== '#') { return } + + save(); // stop us absorbing part of an invalid selector + + while (e = $(/^[#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/)) { + elements.push(new(tree.Element)(c, e, i)); + c = $('>'); + } + if ($('(')) { + expressions = []; + while (arg = $(this.expression)) { + nameLoop = null; + value = arg; + + // Variable + if (arg.value.length == 1) { + var val = arg.value[0]; + if (val instanceof tree.Variable) { + if ($(':')) { + if (expressions.length > 0) { + if (isSemiColonSeperated) { + error("Cannot mix ; and , as delimiter types"); + } + expressionContainsNamed = true; + } + value = expect(this.expression); + nameLoop = (name = val.name); + } + } + } + + expressions.push(value); + + argsComma.push({ name: nameLoop, value: value }); + + if ($(',')) { + continue; + } + + if ($(';') || isSemiColonSeperated) { + + if (expressionContainsNamed) { + error("Cannot mix ; and , as delimiter types"); + } + + isSemiColonSeperated = true; + + if (expressions.length > 1) { + value = new(tree.Value)(expressions); + } + argsSemiColon.push({ name: name, value: value }); + + name = null; + expressions = []; + expressionContainsNamed = false; + } + } + + expect(')'); + } + + args = isSemiColonSeperated ? argsSemiColon : argsComma; + + if ($(this.important)) { + important = true; + } + + if (elements.length > 0 && ($(';') || peek('}'))) { + return new(tree.mixin.Call)(elements, args, index, env.filename, important); + } + + restore(); + }, + + // + // 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 { + $(this.comment); + if (input.charAt(i) === '.' && $(/^\.{3}/)) { + variadic = true; + params.push({ 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 ($(/^\.{3}/)) { + params.push({ name: param.name, variadic: true }); + variadic = true; + break; + } else { + params.push({ name: param.name }); + } + } else { + params.push({ value: param }); + } + } else { + break; + } + } while ($(',') || $(';')) + + // .mixincall("@{a}"); + // looks a bit like a mixin definition.. so we have to be nice and restore + if (!$(')')) { + furthest = i; + restore(); + } + + $(this.comment); + + if ($(/^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-]|[^\x00-\x9f]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) || + $('*') || $('&') || $(this.attribute) || $(/^\([^()@]+\)/) || $(/^[\.#](?=@)/) || $(this.entities.variableCurly); + + if (! e) { + if ($('(')) { + if ((v = ($(this.entities.variableCurly) || + $(this.entities.variable) || + $(this.selector))) && + $(')')) { + e = new(tree.Paren)(v); + } + } + } + + if (e) { return new(tree.Element)(c, e, i) } + }, + + // + // Combinators combine elements together, in a Selector. + // + // Because our parser isn't white-space sensitive, special care + // has to be taken, when parsing the descendant combinator, ` `, + // as it's an empty space. We have to check the previous character + // in the input, to see if it's a ` ` character. More info on how + // we deal with this in *combinator.js*. + // + combinator: function () { + var match, c = input.charAt(i); + + if (c === '>' || c === '+' || c === '~' || c === '|') { + i++; + while (input.charAt(i).match(/\s/)) { i++ } + return new(tree.Combinator)(c); + } else if (input.charAt(i - 1).match(/\s/)) { + return new(tree.Combinator)(" "); + } else { + return new(tree.Combinator)(null); + } + }, + + // + // A CSS Selector + // + // .class > div + h1 + // li a:hover + // + // Selectors are made out of one or more Elements, see above. + // + selector: function () { + var sel, e, elements = [], c, match; + + // depreciated, will be removed soon + if ($('(')) { + sel = $(this.entity); + if (!$(')')) { return null; } + 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 === ',' || c === ')') { break } + } + + if (elements.length > 0) { return new(tree.Selector)(elements) } + }, + attribute: function () { + var attr = '', key, val, op; + + if (! $('[')) return; + + if (key = $(/^(?:[_A-Za-z0-9-]|\\.)+/) || $(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, debugInfo; + + save(); + + if (env.dumpLineNumbers) + debugInfo = getDebugInfo(i, input, env); + + while (s = $(this.selector)) { + selectors.push(s); + $(this.comment); + if (! $(',')) { break } + $(this.comment); + } + + if (selectors.length > 0 && (rules = $(this.block))) { + var ruleset = new(tree.Ruleset)(selectors, rules, env.strictImports); + if (env.dumpLineNumbers) + ruleset.debugInfo = debugInfo; + return ruleset; + } 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; + + save(); + + 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, env.rootpath); + } + } + + restore(); + }, + + 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 (! $(',')) { break } + } + } while (e); + + return features.length > 0 ? features : null; + }, + + media: function () { + var features, rules, media, debugInfo; + + if (env.dumpLineNumbers) + debugInfo = getDebugInfo(i, input, env); + + if ($(/^@media/)) { + features = $(this.mediaFeatures); + + if (rules = $(this.block)) { + media = new(tree.Media)(rules, features); + if(env.dumpLineNumbers) + media.debugInfo = debugInfo; + return media; + } + } + }, + + // + // A CSS Directive + // + // @charset "utf-8"; + // + directive: function () { + var name, value, rules, identifier, e, nodes, nonVendorSpecificName, + hasBlock, hasIdentifier, hasExpression; + + if (input.charAt(i) !== '@') return; + + if (value = $(this['import']) || $(this.media)) { + return value; + } + + save(); + + name = $(/^@[a-z-]+/); + + if (!name) return; + + nonVendorSpecificName = name; + if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) { + nonVendorSpecificName = "@" + name.slice(name.indexOf('-', 2) + 1); + } + + switch(nonVendorSpecificName) { + case "@font-face": + hasBlock = true; + break; + case "@viewport": + case "@top-left": + case "@top-left-corner": + case "@top-center": + case "@top-right": + case "@top-right-corner": + case "@bottom-left": + case "@bottom-left-corner": + case "@bottom-center": + case "@bottom-right": + case "@bottom-right-corner": + case "@left-top": + case "@left-middle": + case "@left-bottom": + case "@right-top": + case "@right-middle": + case "@right-bottom": + hasBlock = true; + break; + case "@page": + case "@document": + case "@supports": + case "@keyframes": + hasBlock = true; + hasIdentifier = true; + break; + case "@namespace": + hasExpression = true; + break; + } + + if (hasIdentifier) { + name += " " + ($(/^[^{]+/) || '').trim(); + } + + if (hasBlock) + { + if (rules = $(this.block)) { + return new(tree.Directive)(name, rules); + } + } else { + if ((value = hasExpression ? $(this.expression) : $(this.entity)) && $(';')) { + var directive = new(tree.Directive)(name, value); + if (env.dumpLineNumbers) { + directive.debugInfo = getDebugInfo(i, input, env); + } + return directive; + } + } + + restore(); + }, + 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 = $(/^[-+]\s+/) || (!isWhitespace(input.charAt(i - 1)) && ($('+') || $('-')))) && + (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-z0-9-]+)\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, + contents: env.contents, + files: env.files, + rootpath: env.rootpath, + entryPath: env.entryPath, + relativeUrls: env.relativeUrls }, + function (e, root, data, sheet, _, path) { + if (e && typeof(env.errback) === "function") { + env.errback.call(null, path, paths, callback, env); + } else { + callback.call(null, e, root, path); + } + }, true); + }; +} + +(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 scaled(c, 256); }); + 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; + } + }, + + hsv: function(h, s, v) { + return this.hsva(h, s, v, 1.0); + }, + + hsva: function(h, s, v, a) { + h = ((number(h) % 360) / 360) * 360; + s = number(s); v = number(v); a = number(a); + + var i, f; + i = Math.floor((h / 60) % 6); + f = (h / 60) - i; + + var vs = [v, + v * (1 - s), + v * (1 - f * s), + v * (1 - (1 - f) * s)]; + var perm = [[0, 3, 1], + [2, 0, 1], + [1, 0, 3], + [1, 2, 0], + [3, 1, 0], + [0, 1, 2]]; + + return this.rgba(vs[perm[i][0]] * 255, + vs[perm[i][1]] * 255, + vs[perm[i][2]] * 255, + a); + }, + + 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), '%'); + }, + red: function (color) { + return new(tree.Dimension)(color.rgb[0]); + }, + green: function (color) { + return new(tree.Dimension)(color.rgb[1]); + }, + blue: function (color) { + return new(tree.Dimension)(color.rgb[2]); + }, + alpha: function (color) { + return new(tree.Dimension)(color.toHSL().a); + }, + luma: function (color) { + return new(tree.Dimension)(Math.round((0.2126 * (color.rgb[0]/255) + + 0.7152 * (color.rgb[1]/255) + + 0.0722 * (color.rgb[2]/255)) * + color.alpha * 100), '%'); + }, + 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) { + if (!weight) { + weight = new(tree.Dimension)(50); + } + 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)); + }, + contrast: function (color, dark, light, threshold) { + // filter: contrast(3.2); + // should be kept as is, so check for color + if (!color.rgb) { + return null; + } + if (typeof light === 'undefined') { + light = this.rgba(255, 255, 255, 1.0); + } + if (typeof dark === 'undefined') { + dark = this.rgba(0, 0, 0, 1.0); + } + if (typeof threshold === 'undefined') { + threshold = 0.43; + } else { + threshold = threshold.value; + } + if (((0.2126 * (color.rgb[0]/255) + 0.7152 * (color.rgb[1]/255) + 0.0722 * (color.rgb[2]/255)) * color.alpha) < threshold) { + return light; + } else { + return dark; + } + }, + 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); + }, + unit: function (val, unit) { + return new(tree.Dimension)(val.value, unit ? unit.toCSS() : ""); + }, + round: function (n, f) { + var fraction = typeof(f) === "undefined" ? 0 : f.value; + return this._math(function(num) { return num.toFixed(fraction); }, n); + }, + ceil: function (n) { + return this._math(Math.ceil, n); + }, + floor: function (n) { + return this._math(Math.floor, n); + }, + _math: function (fn, n) { + if (n instanceof tree.Dimension) { + return new(tree.Dimension)(fn(parseFloat(n.value)), n.unit); + } else if (typeof(n) === 'number') { + return 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; + }, + + /* Blending modes */ + + multiply: function(color1, color2) { + var r = color1.rgb[0] * color2.rgb[0] / 255; + var g = color1.rgb[1] * color2.rgb[1] / 255; + var b = color1.rgb[2] * color2.rgb[2] / 255; + return this.rgb(r, g, b); + }, + screen: function(color1, color2) { + var r = 255 - (255 - color1.rgb[0]) * (255 - color2.rgb[0]) / 255; + var g = 255 - (255 - color1.rgb[1]) * (255 - color2.rgb[1]) / 255; + var b = 255 - (255 - color1.rgb[2]) * (255 - color2.rgb[2]) / 255; + return this.rgb(r, g, b); + }, + overlay: function(color1, color2) { + var r = color1.rgb[0] < 128 ? 2 * color1.rgb[0] * color2.rgb[0] / 255 : 255 - 2 * (255 - color1.rgb[0]) * (255 - color2.rgb[0]) / 255; + var g = color1.rgb[1] < 128 ? 2 * color1.rgb[1] * color2.rgb[1] / 255 : 255 - 2 * (255 - color1.rgb[1]) * (255 - color2.rgb[1]) / 255; + var b = color1.rgb[2] < 128 ? 2 * color1.rgb[2] * color2.rgb[2] / 255 : 255 - 2 * (255 - color1.rgb[2]) * (255 - color2.rgb[2]) / 255; + return this.rgb(r, g, b); + }, + softlight: function(color1, color2) { + var t = color2.rgb[0] * color1.rgb[0] / 255; + var r = t + color1.rgb[0] * (255 - (255 - color1.rgb[0]) * (255 - color2.rgb[0]) / 255 - t) / 255; + t = color2.rgb[1] * color1.rgb[1] / 255; + var g = t + color1.rgb[1] * (255 - (255 - color1.rgb[1]) * (255 - color2.rgb[1]) / 255 - t) / 255; + t = color2.rgb[2] * color1.rgb[2] / 255; + var b = t + color1.rgb[2] * (255 - (255 - color1.rgb[2]) * (255 - color2.rgb[2]) / 255 - t) / 255; + return this.rgb(r, g, b); + }, + hardlight: function(color1, color2) { + var r = color2.rgb[0] < 128 ? 2 * color2.rgb[0] * color1.rgb[0] / 255 : 255 - 2 * (255 - color2.rgb[0]) * (255 - color1.rgb[0]) / 255; + var g = color2.rgb[1] < 128 ? 2 * color2.rgb[1] * color1.rgb[1] / 255 : 255 - 2 * (255 - color2.rgb[1]) * (255 - color1.rgb[1]) / 255; + var b = color2.rgb[2] < 128 ? 2 * color2.rgb[2] * color1.rgb[2] / 255 : 255 - 2 * (255 - color2.rgb[2]) * (255 - color1.rgb[2]) / 255; + return this.rgb(r, g, b); + }, + difference: function(color1, color2) { + var r = Math.abs(color1.rgb[0] - color2.rgb[0]); + var g = Math.abs(color1.rgb[1] - color2.rgb[1]); + var b = Math.abs(color1.rgb[2] - color2.rgb[2]); + return this.rgb(r, g, b); + }, + exclusion: function(color1, color2) { + var r = color1.rgb[0] + color2.rgb[0] * (255 - color1.rgb[0] - color1.rgb[0]) / 255; + var g = color1.rgb[1] + color2.rgb[1] * (255 - color1.rgb[1] - color1.rgb[1]) / 255; + var b = color1.rgb[2] + color2.rgb[2] * (255 - color1.rgb[2] - color1.rgb[2]) / 255; + return this.rgb(r, g, b); + }, + average: function(color1, color2) { + var r = (color1.rgb[0] + color2.rgb[0]) / 2; + var g = (color1.rgb[1] + color2.rgb[1]) / 2; + var b = (color1.rgb[2] + color2.rgb[2]) / 2; + return this.rgb(r, g, b); + }, + negation: function(color1, color2) { + var r = 255 - Math.abs(255 - color2.rgb[0] - color1.rgb[0]); + var g = 255 - Math.abs(255 - color2.rgb[1] - color1.rgb[1]); + var b = 255 - Math.abs(255 - color2.rgb[2] - color1.rgb[2]); + return this.rgb(r, g, b); + }, + tint: function(color, amount) { + return this.mix(this.rgb(255,255,255), color, amount); + }, + shade: function(color, amount) { + return this.mix(this.rgb(0, 0, 0), color, amount); + } +}; + +function hsla(color) { + return tree.functions.hsla(color.h, color.s, color.l, color.a); +} + +function scaled(n, size) { + if (n instanceof tree.Dimension && n.unit == '%') { + return parseFloat(n.value * size / 100); + } else { + return number(n); + } +} + +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')); +(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')); +(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')); +(function (tree) { + +tree.Anonymous = function (string) { + this.value = string.value || string; +}; +tree.Anonymous.prototype = { + toCSS: function () { + return this.value; + }, + eval: function () { return this }, + compare: function (x) { + if (!x.toCSS) { + return -1; + } + + var left = this.toCSS(), + right = x.toCSS(); + + if (left === right) { + return 0; + } + + return left < right ? -1 : 1; + } +}; + +})(require('../tree')); +(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) { + return new(tree.Assignment)(this.key, this.value.eval(env)); + } + return this; + } +}; + +})(require('../tree'));(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, + // if this returns null or we cannot find the function, 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) }), + result; + + if (this.name in tree.functions) { // 1. + try { + result = tree.functions[this.name].apply(tree.functions, args); + if (result != null) { + return result; + } + } catch (e) { + throw { type: e.type || "Runtime", + message: "error evaluating function `" + this.name + "`" + + (e.message ? ': ' + e.message : ''), + index: this.index, filename: this.filename }; + } + } + + // 2. + return new(tree.Anonymous)(this.name + + "(" + args.map(function (a) { return a.toCSS(env) }).join(', ') + ")"); + }, + + toCSS: function (env) { + return this.eval(env).toCSS(); + } +}; + +})(require('../tree')); +(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(''); + }, + compare: function (x) { + if (!x.rgb) { + return -1; + } + + return (x.rgb[0] === this.rgb[0] && + x.rgb[1] === this.rgb[1] && + x.rgb[2] === this.rgb[2] && + x.alpha === this.alpha) ? 0 : -1; + } +}; + + +})(require('../tree')); +(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')); +(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); + + v