3294 lines
108 KiB
JavaScript
3294 lines
108 KiB
JavaScript
//
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// LESS - Leaner CSS v1.2.0
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// http://lesscss.org
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//
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// Copyright (c) 2009-2011, Alexis Sellier
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// Licensed under the Apache 2.0 License.
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//
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(function (window, undefined) {
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//
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// Stub out `require` in the browser
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//
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function require(arg) {
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return window.less[arg.split('/')[1]];
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};
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// ecma-5.js
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//
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// -- kriskowal Kris Kowal Copyright (C) 2009-2010 MIT License
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// -- tlrobinson Tom Robinson
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// dantman Daniel Friesen
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//
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// Array
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//
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if (!Array.isArray) {
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Array.isArray = function(obj) {
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return Object.prototype.toString.call(obj) === "[object Array]" ||
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(obj instanceof Array);
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};
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}
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if (!Array.prototype.forEach) {
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Array.prototype.forEach = function(block, thisObject) {
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var len = this.length >>> 0;
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for (var i = 0; i < len; i++) {
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if (i in this) {
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block.call(thisObject, this[i], i, this);
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}
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}
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};
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}
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if (!Array.prototype.map) {
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Array.prototype.map = function(fun /*, thisp*/) {
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var len = this.length >>> 0;
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var res = new Array(len);
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var thisp = arguments[1];
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for (var i = 0; i < len; i++) {
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if (i in this) {
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res[i] = fun.call(thisp, this[i], i, this);
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}
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}
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return res;
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};
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}
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if (!Array.prototype.filter) {
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Array.prototype.filter = function (block /*, thisp */) {
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var values = [];
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var thisp = arguments[1];
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for (var i = 0; i < this.length; i++) {
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if (block.call(thisp, this[i])) {
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values.push(this[i]);
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}
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}
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return values;
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};
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}
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if (!Array.prototype.reduce) {
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Array.prototype.reduce = function(fun /*, initial*/) {
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var len = this.length >>> 0;
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var i = 0;
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// no value to return if no initial value and an empty array
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if (len === 0 && arguments.length === 1) throw new TypeError();
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if (arguments.length >= 2) {
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var rv = arguments[1];
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} else {
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do {
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if (i in this) {
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rv = this[i++];
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break;
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}
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// if array contains no values, no initial value to return
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if (++i >= len) throw new TypeError();
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} while (true);
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}
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for (; i < len; i++) {
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if (i in this) {
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rv = fun.call(null, rv, this[i], i, this);
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}
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}
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return rv;
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};
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}
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if (!Array.prototype.indexOf) {
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Array.prototype.indexOf = function (value /*, fromIndex */ ) {
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var length = this.length;
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var i = arguments[1] || 0;
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if (!length) return -1;
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if (i >= length) return -1;
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if (i < 0) i += length;
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for (; i < length; i++) {
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if (!Object.prototype.hasOwnProperty.call(this, i)) { continue }
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if (value === this[i]) return i;
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}
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return -1;
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};
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}
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//
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// Object
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//
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if (!Object.keys) {
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Object.keys = function (object) {
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var keys = [];
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for (var name in object) {
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if (Object.prototype.hasOwnProperty.call(object, name)) {
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keys.push(name);
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}
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}
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return keys;
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};
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}
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//
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// String
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//
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if (!String.prototype.trim) {
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String.prototype.trim = function () {
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return String(this).replace(/^\s\s*/, '').replace(/\s\s*$/, '');
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};
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}
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var less, tree;
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if (typeof environment === "object" && ({}).toString.call(environment) === "[object Environment]") {
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// Rhino
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// Details on how to detect Rhino: https://github.com/ringo/ringojs/issues/88
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if (typeof(window) === 'undefined') { less = {} }
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else { less = window.less = {} }
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tree = less.tree = {};
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less.mode = 'rhino';
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} else if (typeof(window) === 'undefined') {
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// Node.js
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less = exports,
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tree = require('./tree');
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less.mode = 'node';
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} else {
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// Browser
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if (typeof(window.less) === 'undefined') { window.less = {} }
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less = window.less,
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tree = window.less.tree = {};
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less.mode = 'browser';
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}
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//
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// less.js - parser
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//
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// A relatively straight-forward predictive parser.
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// There is no tokenization/lexing stage, the input is parsed
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// in one sweep.
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//
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// To make the parser fast enough to run in the browser, several
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// optimization had to be made:
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//
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// - Matching and slicing on a huge input is often cause of slowdowns.
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// The solution is to chunkify the input into smaller strings.
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// The chunks are stored in the `chunks` var,
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// `j` holds the current chunk index, and `current` holds
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// the index of the current chunk in relation to `input`.
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// This gives us an almost 4x speed-up.
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//
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// - In many cases, we don't need to match individual tokens;
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// for example, if a value doesn't hold any variables, operations
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// or dynamic references, the parser can effectively 'skip' it,
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// treating it as a literal.
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// An example would be '1px solid #000' - which evaluates to itself,
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// we don't need to know what the individual components are.
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// The drawback, of course is that you don't get the benefits of
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// syntax-checking on the CSS. This gives us a 50% speed-up in the parser,
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// and a smaller speed-up in the code-gen.
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//
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//
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// Token matching is done with the `$` function, which either takes
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// a terminal string or regexp, or a non-terminal function to call.
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// It also takes care of moving all the indices forwards.
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//
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//
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less.Parser = function Parser(env) {
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var input, // LeSS input string
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i, // current index in `input`
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j, // current chunk
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temp, // temporarily holds a chunk's state, for backtracking
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memo, // temporarily holds `i`, when backtracking
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furthest, // furthest index the parser has gone to
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chunks, // chunkified input
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current, // index of current chunk, in `input`
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parser;
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var that = this;
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// This function is called after all files
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// have been imported through `@import`.
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var finish = function () {};
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var imports = this.imports = {
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paths: env && env.paths || [], // Search paths, when importing
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queue: [], // Files which haven't been imported yet
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files: {}, // Holds the imported parse trees
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mime: env && env.mime, // MIME type of .less files
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error: null, // Error in parsing/evaluating an import
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push: function (path, callback) {
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var that = this;
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this.queue.push(path);
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//
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// Import a file asynchronously
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//
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less.Parser.importer(path, this.paths, function (e, root) {
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that.queue.splice(that.queue.indexOf(path), 1); // Remove the path from the queue
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that.files[path] = root; // Store the root
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if (e && !that.error) { that.error = e }
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callback(e, root);
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if (that.queue.length === 0) { finish() } // Call `finish` if we're done importing
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}, env);
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}
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};
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function save() { temp = chunks[j], memo = i, current = i }
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function restore() { chunks[j] = temp, i = memo, current = i }
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function sync() {
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if (i > current) {
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chunks[j] = chunks[j].slice(i - current);
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current = i;
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}
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}
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//
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// Parse from a token, regexp or string, and move forward if match
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//
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function $(tok) {
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var match, args, length, c, index, endIndex, k, mem;
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//
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// Non-terminal
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//
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if (tok instanceof Function) {
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return tok.call(parser.parsers);
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//
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// Terminal
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//
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// Either match a single character in the input,
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// or match a regexp in the current chunk (chunk[j]).
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//
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} else if (typeof(tok) === 'string') {
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match = input.charAt(i) === tok ? tok : null;
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length = 1;
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sync ();
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} else {
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sync ();
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if (match = tok.exec(chunks[j])) {
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length = match[0].length;
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} else {
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return null;
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}
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}
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// The match is confirmed, add the match length to `i`,
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// and consume any extra white-space characters (' ' || '\n')
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// which come after that. The reason for this is that LeSS's
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// grammar is mostly white-space insensitive.
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//
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if (match) {
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mem = i += length;
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endIndex = i + chunks[j].length - length;
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while (i < endIndex) {
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c = input.charCodeAt(i);
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if (! (c === 32 || c === 10 || c === 9)) { break }
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i++;
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}
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chunks[j] = chunks[j].slice(length + (i - mem));
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current = i;
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if (chunks[j].length === 0 && j < chunks.length - 1) { j++ }
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if(typeof(match) === 'string') {
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return match;
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} else {
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return match.length === 1 ? match[0] : match;
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}
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}
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}
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function expect(arg, msg) {
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var result = $(arg);
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if (! result) {
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error(msg || (typeof(arg) === 'string' ? "expected '" + arg + "' got '" + input.charAt(i) + "'"
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: "unexpected token"));
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} else {
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return result;
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}
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}
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function error(msg, type) {
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throw { index: i, type: type || 'Syntax', message: msg };
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}
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// Same as $(), but don't change the state of the parser,
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// just return the match.
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function peek(tok) {
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if (typeof(tok) === 'string') {
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return input.charAt(i) === tok;
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} else {
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if (tok.test(chunks[j])) {
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return true;
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} else {
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return false;
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}
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}
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}
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function getLocation(index) {
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for (var n = index, column = -1;
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n >= 0 && input.charAt(n) !== '\n';
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n--) { column++ }
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return { line: index ? (input.slice(0, index).match(/\n/g) || "").length : null,
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column: column };
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}
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function LessError(e, env) {
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var lines = input.split('\n'),
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loc = getLocation(e.index),
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line = loc.line,
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col = loc.column;
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this.type = e.type || 'SyntaxError';
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this.message = e.message;
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this.filename = e.filename || env.filename;
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this.index = e.index;
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this.line = typeof(line) === 'number' ? line + 1 : null;
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this.callLine = e.call && (getLocation(e.call) + 1);
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this.callExtract = lines[getLocation(e.call)];
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this.stack = e.stack;
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this.column = col;
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this.extract = [
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lines[line - 1],
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lines[line],
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lines[line + 1]
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];
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}
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this.env = env = env || {};
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// The optimization level dictates the thoroughness of the parser,
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// the lower the number, the less nodes it will create in the tree.
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// This could matter for debugging, or if you want to access
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// the individual nodes in the tree.
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this.optimization = ('optimization' in this.env) ? this.env.optimization : 1;
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this.env.filename = this.env.filename || null;
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//
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// The Parser
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//
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return parser = {
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imports: imports,
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//
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// Parse an input string into an abstract syntax tree,
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// call `callback` when done.
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//
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parse: function (str, callback) {
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var root, start, end, zone, line, lines, buff = [], c, error = null;
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i = j = current = furthest = 0;
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chunks = [];
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input = str.replace(/\r\n/g, '\n');
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// Split the input into chunks.
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chunks = (function (chunks) {
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var j = 0,
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skip = /[^"'`\{\}\/\(\)]+/g,
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comment = /\/\*(?:[^*]|\*+[^\/*])*\*+\/|\/\/.*/g,
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level = 0,
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match,
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chunk = chunks[0],
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inParam,
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inString;
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for (var i = 0, c, cc; i < input.length; i++) {
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skip.lastIndex = i;
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if (match = skip.exec(input)) {
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if (match.index === i) {
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i += match[0].length;
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chunk.push(match[0]);
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}
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}
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c = input.charAt(i);
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comment.lastIndex = i;
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if (!inString && !inParam && c === '/') {
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cc = input.charAt(i + 1);
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if (cc === '/' || cc === '*') {
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if (match = comment.exec(input)) {
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if (match.index === i) {
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i += match[0].length;
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chunk.push(match[0]);
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c = input.charAt(i);
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}
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}
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}
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}
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if (c === '{' && !inString && !inParam) { level ++;
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chunk.push(c);
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} else if (c === '}' && !inString && !inParam) { level --;
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chunk.push(c);
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chunks[++j] = chunk = [];
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} else if (c === '(' && !inString && !inParam) {
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chunk.push(c);
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inParam = true;
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} else if (c === ')' && !inString && inParam) {
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chunk.push(c);
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inParam = false;
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} else {
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if (c === '"' || c === "'" || c === '`') {
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if (! inString) {
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inString = c;
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} else {
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inString = inString === c ? false : inString;
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}
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}
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chunk.push(c);
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}
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}
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if (level > 0) {
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throw {
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type: 'Syntax',
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message: "Missing closing `}`",
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filename: env.filename
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};
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}
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return chunks.map(function (c) { return c.join('') });;
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})([[]]);
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// Start with the primary rule.
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// The whole syntax tree is held under a Ruleset node,
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// with the `root` property set to true, so no `{}` are
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// output. The callback is called when the input is parsed.
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try {
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root = new(tree.Ruleset)([], $(this.parsers.primary));
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root.root = true;
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} catch (e) {
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return callback(new(LessError)(e, env));
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}
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root.toCSS = (function (evaluate) {
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var line, lines, column;
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return function (options, variables) {
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var frames = [];
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options = options || {};
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//
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|
// Allows setting variables with a hash, so:
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//
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// `{ color: new(tree.Color)('#f01') }` will become:
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//
|
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// new(tree.Rule)('@color',
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// new(tree.Value)([
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// new(tree.Expression)([
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// new(tree.Color)('#f01')
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// ])
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// ])
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// )
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//
|
|
if (typeof(variables) === 'object' && !Array.isArray(variables)) {
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variables = Object.keys(variables).map(function (k) {
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var value = variables[k];
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if (! (value instanceof tree.Value)) {
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if (! (value instanceof tree.Expression)) {
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value = new(tree.Expression)([value]);
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}
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value = new(tree.Value)([value]);
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}
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return new(tree.Rule)('@' + k, value, false, 0);
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});
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frames = [new(tree.Ruleset)(null, variables)];
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}
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try {
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var css = evaluate.call(this, { frames: frames })
|
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.toCSS([], { compress: options.compress || false });
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|
} catch (e) {
|
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throw new(LessError)(e, env);
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}
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if (parser.imports.error) { throw parser.imports.error }
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if (options.yuicompress && less.mode === 'node') {
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return require('./cssmin').compressor.cssmin(css);
|
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} else if (options.compress) {
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return css.replace(/(\s)+/g, "$1");
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} else {
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return css;
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}
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};
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})(root.eval);
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|
|
// If `i` is smaller than the `input.length - 1`,
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// it means the parser wasn't able to parse the whole
|
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// string, so we've got a parsing error.
|
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//
|
|
// 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) {
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i = furthest;
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lines = input.split('\n');
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line = (input.slice(0, i).match(/\n/g) || "").length + 1;
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for (var n = i, column = -1; n >= 0 && input.charAt(n) !== '\n'; n--) { column++ }
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error = {
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type: "Parse",
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message: "Syntax Error on line " + line,
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index: i,
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filename: env.filename,
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line: line,
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column: column,
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extract: [
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lines[line - 2],
|
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lines[line - 1],
|
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lines[line]
|
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]
|
|
};
|
|
}
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|
|
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) }
|
|
},
|
|
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);
|
|
}
|
|
},
|
|
|
|
//
|
|
// 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)?/)) {
|
|
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, index = i, s = input.charAt(i), 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 = $('>');
|
|
}
|
|
$('(') && (args = $(this.entities.arguments)) && $(')');
|
|
|
|
if ($(this.important)) {
|
|
important = true;
|
|
}
|
|
|
|
if (elements.length > 0 && ($(';') || peek('}'))) {
|
|
return new(tree.mixin.Call)(elements, args, index, 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;
|
|
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];
|
|
|
|
while (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 {
|
|
params.push({ name: param.name });
|
|
}
|
|
} else {
|
|
params.push({ value: param });
|
|
}
|
|
if (! $(',')) { break }
|
|
}
|
|
expect(')');
|
|
|
|
if ($(/^when/)) { // Guard
|
|
cond = expect(this.conditions, 'expected condition');
|
|
}
|
|
|
|
ruleset = $(this.block);
|
|
|
|
if (ruleset) {
|
|
return new(tree.mixin.Definition)(name, params, ruleset, cond);
|
|
} 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 (c === ':' && input.charAt(i + 1) === ':') {
|
|
i += 2;
|
|
while (input.charAt(i) === ' ') { i++ }
|
|
return new(tree.Combinator)('::');
|
|
} 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;
|
|
|
|
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);
|
|
} 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 && $(this.end)) {
|
|
return new(tree.Rule)(name, value, important, memo);
|
|
} else {
|
|
furthest = i;
|
|
restore();
|
|
}
|
|
}
|
|
},
|
|
|
|
//
|
|
// An @import directive
|
|
//
|
|
// @import "lib";
|
|
//
|
|
// Depending on our environemnt, importing is done differently:
|
|
// In the browser, it's an XHR request, in Node, it would be a
|
|
// file-system operation. The function used for importing is
|
|
// stored in `import`, which we pass to the Import constructor.
|
|
//
|
|
"import": function () {
|
|
var path, features;
|
|
if ($(/^@import\s+/) &&
|
|
(path = $(this.entities.quoted) || $(this.entities.url))) {
|
|
features = $(this.mediaFeatures);
|
|
if ($(';')) {
|
|
return new(tree.Import)(path, imports, features);
|
|
}
|
|
}
|
|
},
|
|
|
|
mediaFeature: function () {
|
|
var 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 f, features = [];
|
|
while (f = $(this.mediaFeature)) {
|
|
features.push(f);
|
|
if (! $(',')) { break }
|
|
}
|
|
return features.length > 0 ? features : null;
|
|
},
|
|
|
|
media: function () {
|
|
var features;
|
|
|
|
if ($(/^@media/)) {
|
|
features = $(this.mediaFeatures);
|
|
|
|
if (rules = $(this.block)) {
|
|
return new(tree.Directive)('@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 (path.charAt(0) !== '/' && 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 }, callback, 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 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'));
|
|
(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',
|
|
'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 }
|
|
};
|
|
|
|
})(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) { this.value = this.value.eval(env) }
|
|
return this;
|
|
}
|
|
};
|
|
|
|
})(require('../tree'));(function (tree) {
|
|
|
|
//
|
|
// A function call node.
|
|
//
|
|
tree.Call = function (name, args, index) {
|
|
this.name = name;
|
|
this.args = args;
|
|
this.index = index;
|
|
};
|
|
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 };
|
|
}
|
|
} 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'));
|
|
(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'));
|
|
(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);
|
|
|
|
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'));
|
|
(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'));
|
|
(function (tree) {
|
|
|
|
tree.Directive = function (name, value, features) {
|
|
this.name = name;
|
|
this.features = features && new(tree.Value)(features);
|
|
|
|
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) {
|
|
var features = this.features ? ' ' + this.features.toCSS(env) : '';
|
|
|
|
if (this.ruleset) {
|
|
this.ruleset.root = true;
|
|
return this.name + features + (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) {
|
|
this.features = this.features && this.features.eval(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'));
|
|
(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) {
|
|
return this.combinator.toCSS(env || {}) + (this.value.toCSS ? this.value.toCSS(env) : this.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'));
|
|
(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'));
|
|
(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) {
|
|
var that = this;
|
|
|
|
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) {
|
|
that.root = root;
|
|
});
|
|
}
|
|
};
|
|
|
|
//
|
|
// 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.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.Directive)('@media', ruleset.rules, this.features.value) : ruleset.rules;
|
|
}
|
|
}
|
|
};
|
|
|
|
})(require('../tree'));
|
|
(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'));
|
|
|
|
(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'));
|
|
(function (tree) {
|
|
|
|
tree.mixin = {};
|
|
tree.mixin.Call = function (elements, args, index, important) {
|
|
this.selector = new(tree.Selector)(elements);
|
|
this.arguments = args;
|
|
this.index = index;
|
|
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 a.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: e.index, stack: e.stack, call: this.index };
|
|
}
|
|
}
|
|
}
|
|
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 };
|
|
}
|
|
}
|
|
}
|
|
throw { type: 'Name',
|
|
message: this.selector.toCSS().trim() + " is undefined",
|
|
index: this.index };
|
|
}
|
|
};
|
|
|
|
tree.mixin.Definition = function (name, params, rules, condition) {
|
|
this.name = name;
|
|
this.selectors = [new(tree.Selector)([new(tree.Element)(null, name)])];
|
|
this.params = params;
|
|
this.condition = condition;
|
|
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, []);
|
|
|
|
for (var i = 0, val; i < this.params.length; i++) {
|
|
if (this.params[i].name) {
|
|
if (val = (args && args[i]) || this.params[i].value) {
|
|
frame.rules.unshift(new(tree.Rule)(this.params[i].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;
|
|
|
|
for (var i = 0; i < Math.max(this.params.length, args && args.length); i++) {
|
|
_arguments.push(args[i] || 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 (argsLength < this.required) { 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].eval(env).toCSS() != this.params[i].value.eval(env).toCSS()) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
};
|
|
|
|
})(require('../tree'));
|
|
(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'));
|
|
|
|
(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'));
|
|
(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'));
|
|
(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'));
|
|
(function (tree) {
|
|
|
|
tree.Ruleset = function (selectors, rules) {
|
|
this.selectors = selectors;
|
|
this.rules = rules;
|
|
this._lookups = {};
|
|
};
|
|
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));
|
|
|
|
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) {
|
|
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
|
|
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)) {
|
|
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 ? ',' : (paths.length > 3 ? ',\n' : ', '));
|
|
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'));
|
|
(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'));
|
|
(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'));
|
|
(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'));
|
|
(function (tree) {
|
|
|
|
tree.Variable = function (name, index) { this.name = name, this.index = index };
|
|
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 { message: "variable " + name + " is undefined",
|
|
index: this.index };
|
|
}
|
|
}
|
|
};
|
|
|
|
})(require('../tree'));
|
|
(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'));
|
|
//
|
|
// 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 (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 <link> 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 (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;
|
|
}
|
|
}
|
|
|
|
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, sheet, { local: true, remaining: remaining });
|
|
} else {
|
|
// Use remote copy (re-parse)
|
|
try {
|
|
new(less.Parser)({
|
|
optimization: less.optimization,
|
|
paths: [href.replace(/[\w\.-]+$/, '')],
|
|
mime: sheet.type
|
|
}).parse(data, function (e, root) {
|
|
if (e) { return error(e, href) }
|
|
try {
|
|
callback(root, sheet, { local: false, lastModified: lastModified, remaining: remaining });
|
|
removeNode(document.getElementById('less-error-message:' + extractId(href)));
|
|
} catch (e) {
|
|
error(e, href);
|
|
}
|
|
});
|
|
} catch (e) {
|
|
error(e, href);
|
|
}
|
|
}
|
|
}, function (status, url) {
|
|
throw new(Error)("Couldn't load " + url + " (" + status + ")");
|
|
});
|
|
}
|
|
|
|
function extractId(href) {
|
|
return href.replace(/^[a-z]+:\/\/?[^\/]+/, '' ) // Remove protocol & domain
|
|
.replace(/^\//, '' ) // Remove root /
|
|
.replace(/\?.*$/, '' ) // 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 = ['<ul>',
|
|
'<li><label>[-1]</label><pre class="ctx">{0}</pre></li>',
|
|
'<li><label>[0]</label><pre>{current}</pre></li>',
|
|
'<li><label>[1]</label><pre class="ctx">{2}</pre></li>',
|
|
'</ul>'].join('\n');
|
|
|
|
var elem = document.createElement('div'), timer, content;
|
|
|
|
elem.id = id;
|
|
elem.className = "less-error-message";
|
|
|
|
content = '<h3>' + (e.message || 'There is an error in your .less file') +
|
|
'</h3>' + '<p><a href="' + href + '">' + href + "</a> ";
|
|
|
|
if (e.extract) {
|
|
content += 'on line ' + e.line + ', column ' + (e.column + 1) + ':</p>' +
|
|
template.replace(/\[(-?\d)\]/g, function (_, i) {
|
|
return (parseInt(e.line) + parseInt(i)) || '';
|
|
}).replace(/\{(\d)\}/g, function (_, i) {
|
|
return e.extract[parseInt(i)] || '';
|
|
}).replace(/\{current\}/, e.extract[1].slice(0, e.column) + '<span class="error">' +
|
|
e.extract[1].slice(e.column) + '</span>');
|
|
}
|
|
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: #ee4444;',
|
|
'padding: 4px 0;',
|
|
'margin: 0;',
|
|
'display: inline-block;',
|
|
'}',
|
|
'.less-error-message pre.ctx {',
|
|
'color: #dd4444;',
|
|
'}',
|
|
'.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);
|
|
}
|
|
}
|
|
|
|
})(window);
|