//
// LESS - Leaner CSS v1.3.3
// http://lesscss.org
//
// Copyright (c) 2009-2013, Alexis Sellier
// Licensed under the Apache 2.0 License.
//
(function (window, undefined) {
//
// Stub out `require` in the browser
//
function require(arg) {
return window.less[arg.split('/')[1]];
};
// ecma-5.js
//
// -- kriskowal Kris Kowal Copyright (C) 2009-2010 MIT License
// -- tlrobinson Tom Robinson
// dantman Daniel Friesen
//
// Array
//
if (!Array.isArray) {
Array.isArray = function(obj) {
return Object.prototype.toString.call(obj) === "[object Array]" ||
(obj instanceof Array);
};
}
if (!Array.prototype.forEach) {
Array.prototype.forEach = function(block, thisObject) {
var len = this.length >>> 0;
for (var i = 0; i < len; i++) {
if (i in this) {
block.call(thisObject, this[i], i, this);
}
}
};
}
if (!Array.prototype.map) {
Array.prototype.map = function(fun /*, thisp*/) {
var len = this.length >>> 0;
var res = new Array(len);
var thisp = arguments[1];
for (var i = 0; i < len; i++) {
if (i in this) {
res[i] = fun.call(thisp, this[i], i, this);
}
}
return res;
};
}
if (!Array.prototype.filter) {
Array.prototype.filter = function (block /*, thisp */) {
var values = [];
var thisp = arguments[1];
for (var i = 0; i < this.length; i++) {
if (block.call(thisp, this[i])) {
values.push(this[i]);
}
}
return values;
};
}
if (!Array.prototype.reduce) {
Array.prototype.reduce = function(fun /*, initial*/) {
var len = this.length >>> 0;
var i = 0;
// no value to return if no initial value and an empty array
if (len === 0 && arguments.length === 1) throw new TypeError();
if (arguments.length >= 2) {
var rv = arguments[1];
} else {
do {
if (i in this) {
rv = this[i++];
break;
}
// if array contains no values, no initial value to return
if (++i >= len) throw new TypeError();
} while (true);
}
for (; i < len; i++) {
if (i in this) {
rv = fun.call(null, rv, this[i], i, this);
}
}
return rv;
};
}
if (!Array.prototype.indexOf) {
Array.prototype.indexOf = function (value /*, fromIndex */ ) {
var length = this.length;
var i = arguments[1] || 0;
if (!length) return -1;
if (i >= length) return -1;
if (i < 0) i += length;
for (; i < length; i++) {
if (!Object.prototype.hasOwnProperty.call(this, i)) { continue }
if (value === this[i]) return i;
}
return -1;
};
}
//
// Object
//
if (!Object.keys) {
Object.keys = function (object) {
var keys = [];
for (var name in object) {
if (Object.prototype.hasOwnProperty.call(object, name)) {
keys.push(name);
}
}
return keys;
};
}
//
// String
//
if (!String.prototype.trim) {
String.prototype.trim = function () {
return String(this).replace(/^\s\s*/, '').replace(/\s\s*$/, '');
};
}
var less, tree, charset;
if (typeof environment === "object" && ({}).toString.call(environment) === "[object Environment]") {
// Rhino
// Details on how to detect Rhino: https://github.com/ringo/ringojs/issues/88
if (typeof(window) === 'undefined') { less = {} }
else { less = window.less = {} }
tree = less.tree = {};
less.mode = 'rhino';
} else if (typeof(window) === 'undefined') {
// Node.js
less = exports,
tree = require('./tree');
less.mode = 'node';
} else {
// Browser
if (typeof(window.less) === 'undefined') { window.less = {} }
less = window.less,
tree = window.less.tree = {};
less.mode = 'browser';
}
//
// less.js - parser
//
// A relatively straight-forward predictive parser.
// There is no tokenization/lexing stage, the input is parsed
// in one sweep.
//
// To make the parser fast enough to run in the browser, several
// optimization had to be made:
//
// - Matching and slicing on a huge input is often cause of slowdowns.
// The solution is to chunkify the input into smaller strings.
// The chunks are stored in the `chunks` var,
// `j` holds the current chunk index, and `current` holds
// the index of the current chunk in relation to `input`.
// This gives us an almost 4x speed-up.
//
// - In many cases, we don't need to match individual tokens;
// for example, if a value doesn't hold any variables, operations
// or dynamic references, the parser can effectively 'skip' it,
// treating it as a literal.
// An example would be '1px solid #000' - which evaluates to itself,
// we don't need to know what the individual components are.
// The drawback, of course is that you don't get the benefits of
// syntax-checking on the CSS. This gives us a 50% speed-up in the parser,
// and a smaller speed-up in the code-gen.
//
//
// Token matching is done with the `$` function, which either takes
// a terminal string or regexp, or a non-terminal function to call.
// It also takes care of moving all the indices forwards.
//
//
less.Parser = function Parser(env) {
var input, // LeSS input string
i, // current index in `input`
j, // current chunk
temp, // temporarily holds a chunk's state, for backtracking
memo, // temporarily holds `i`, when backtracking
furthest, // furthest index the parser has gone to
chunks, // chunkified input
current, // index of current chunk, in `input`
parser;
var that = this;
// Top parser on an import tree must be sure there is one "env"
// which will then be passed arround by reference.
var env = env || { };
// env.contents and files must be passed arround with top env
if (!env.contents) { env.contents = {}; }
env.rootpath = env.rootpath || ''; // env.rootpath must be initialized to '' if not provided
if (!env.files) { env.files = {}; }
// This function is called after all files
// have been imported through `@import`.
var finish = function () {};
var imports = this.imports = {
paths: env.paths || [], // Search paths, when importing
queue: [], // Files which haven't been imported yet
files: env.files, // Holds the imported parse trees
contents: env.contents, // Holds the imported file contents
mime: env.mime, // MIME type of .less files
error: null, // Error in parsing/evaluating an import
push: function (path, callback) {
var that = this;
this.queue.push(path);
//
// Import a file asynchronously
//
less.Parser.importer(path, this.paths, function (e, root, fullPath) {
that.queue.splice(that.queue.indexOf(path), 1); // Remove the path from the queue
var imported = fullPath in that.files;
that.files[fullPath] = root; // Store the root
if (e && !that.error) { that.error = e }
callback(e, root, imported);
if (that.queue.length === 0) { finish(that.error) } // Call `finish` if we're done importing
}, env);
}
};
function save() { temp = chunks[j], memo = i, current = i }
function restore() { chunks[j] = temp, i = memo, current = i }
function sync() {
if (i > current) {
chunks[j] = chunks[j].slice(i - current);
current = i;
}
}
function isWhitespace(c) {
// Could change to \s?
var code = c.charCodeAt(0);
return code === 32 || code === 10 || code === 9;
}
//
// Parse from a token, regexp or string, and move forward if match
//
function $(tok) {
var match, args, length, index, k;
//
// Non-terminal
//
if (tok instanceof Function) {
return tok.call(parser.parsers);
//
// Terminal
//
// Either match a single character in the input,
// or match a regexp in the current chunk (chunk[j]).
//
} else if (typeof(tok) === 'string') {
match = input.charAt(i) === tok ? tok : null;
length = 1;
sync ();
} else {
sync ();
if (match = tok.exec(chunks[j])) {
length = match[0].length;
} else {
return null;
}
}
// The match is confirmed, add the match length to `i`,
// and consume any extra white-space characters (' ' || '\n')
// which come after that. The reason for this is that LeSS's
// grammar is mostly white-space insensitive.
//
if (match) {
skipWhitespace(length);
if(typeof(match) === 'string') {
return match;
} else {
return match.length === 1 ? match[0] : match;
}
}
}
function skipWhitespace(length) {
var oldi = i, oldj = j,
endIndex = i + chunks[j].length,
mem = i += length;
while (i < endIndex) {
if (! isWhitespace(input.charAt(i))) { break }
i++;
}
chunks[j] = chunks[j].slice(length + (i - mem));
current = i;
if (chunks[j].length === 0 && j < chunks.length - 1) { j++ }
return oldi !== i || oldj !== j;
}
function expect(arg, msg) {
var result = $(arg);
if (! result) {
error(msg || (typeof(arg) === 'string' ? "expected '" + arg + "' got '" + input.charAt(i) + "'"
: "unexpected token"));
} else {
return result;
}
}
function error(msg, type) {
var e = new Error(msg);
e.index = i;
e.type = type || 'Syntax';
throw e;
}
// Same as $(), but don't change the state of the parser,
// just return the match.
function peek(tok) {
if (typeof(tok) === 'string') {
return input.charAt(i) === tok;
} else {
if (tok.test(chunks[j])) {
return true;
} else {
return false;
}
}
}
function getInput(e, env) {
if (e.filename && env.filename && (e.filename !== env.filename)) {
return parser.imports.contents[e.filename];
} else {
return input;
}
}
function getLocation(index, input) {
for (var n = index, column = -1;
n >= 0 && input.charAt(n) !== '\n';
n--) { column++ }
return { line: typeof(index) === 'number' ? (input.slice(0, index).match(/\n/g) || "").length : null,
column: column };
}
function getFileName(e) {
if(less.mode === 'browser' || less.mode === 'rhino')
return e.filename;
else
return require('path').resolve(e.filename);
}
function getDebugInfo(index, inputStream, e) {
return {
lineNumber: getLocation(index, inputStream).line + 1,
fileName: getFileName(e)
};
}
function LessError(e, env) {
var input = getInput(e, env),
loc = getLocation(e.index, input),
line = loc.line,
col = loc.column,
lines = input.split('\n');
this.type = e.type || 'Syntax';
this.message = e.message;
this.filename = e.filename || env.filename;
this.index = e.index;
this.line = typeof(line) === 'number' ? line + 1 : null;
this.callLine = e.call && (getLocation(e.call, input).line + 1);
this.callExtract = lines[getLocation(e.call, input).line];
this.stack = e.stack;
this.column = col;
this.extract = [
lines[line - 1],
lines[line],
lines[line + 1]
];
}
this.env = env = env || {};
// The optimization level dictates the thoroughness of the parser,
// the lower the number, the less nodes it will create in the tree.
// This could matter for debugging, or if you want to access
// the individual nodes in the tree.
this.optimization = ('optimization' in this.env) ? this.env.optimization : 1;
this.env.filename = this.env.filename || null;
//
// The Parser
//
return parser = {
imports: imports,
//
// Parse an input string into an abstract syntax tree,
// call `callback` when done.
//
parse: function (str, callback) {
var root, start, end, zone, line, lines, buff = [], c, error = null;
i = j = current = furthest = 0;
input = str.replace(/\r\n/g, '\n');
// Remove potential UTF Byte Order Mark
input = input.replace(/^\uFEFF/, '');
// Split the input into chunks.
chunks = (function (chunks) {
var j = 0,
skip = /(?:@\{[\w-]+\}|[^"'`\{\}\/\(\)\\])+/g,
comment = /\/\*(?:[^*]|\*+[^\/*])*\*+\/|\/\/.*/g,
string = /"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'|`((?:[^`]|\\.)*)`/g,
level = 0,
match,
chunk = chunks[0],
inParam;
for (var i = 0, c, cc; i < input.length;) {
skip.lastIndex = i;
if (match = skip.exec(input)) {
if (match.index === i) {
i += match[0].length;
chunk.push(match[0]);
}
}
c = input.charAt(i);
comment.lastIndex = string.lastIndex = i;
if (match = string.exec(input)) {
if (match.index === i) {
i += match[0].length;
chunk.push(match[0]);
continue;
}
}
if (!inParam && c === '/') {
cc = input.charAt(i + 1);
if (cc === '/' || cc === '*') {
if (match = comment.exec(input)) {
if (match.index === i) {
i += match[0].length;
chunk.push(match[0]);
continue;
}
}
}
}
switch (c) {
case '{': if (! inParam) { level ++; chunk.push(c); break }
case '}': if (! inParam) { level --; chunk.push(c); chunks[++j] = chunk = []; break }
case '(': if (! inParam) { inParam = true; chunk.push(c); break }
case ')': if ( inParam) { inParam = false; chunk.push(c); break }
default: chunk.push(c);
}
i++;
}
if (level != 0) {
error = new(LessError)({
index: i-1,
type: 'Parse',
message: (level > 0) ? "missing closing `}`" : "missing opening `{`",
filename: env.filename
}, env);
}
return chunks.map(function (c) { return c.join('') });;
})([[]]);
if (error) {
return callback(error, env);
}
// Start with the primary rule.
// The whole syntax tree is held under a Ruleset node,
// with the `root` property set to true, so no `{}` are
// output. The callback is called when the input is parsed.
try {
root = new(tree.Ruleset)([], $(this.parsers.primary));
root.root = true;
} catch (e) {
return callback(new(LessError)(e, env));
}
root.toCSS = (function (evaluate) {
var line, lines, column;
return function (options, variables) {
var frames = [], importError;
options = options || {};
//
// Allows setting variables with a hash, so:
//
// `{ color: new(tree.Color)('#f01') }` will become:
//
// new(tree.Rule)('@color',
// new(tree.Value)([
// new(tree.Expression)([
// new(tree.Color)('#f01')
// ])
// ])
// )
//
if (typeof(variables) === 'object' && !Array.isArray(variables)) {
variables = Object.keys(variables).map(function (k) {
var value = variables[k];
if (! (value instanceof tree.Value)) {
if (! (value instanceof tree.Expression)) {
value = new(tree.Expression)([value]);
}
value = new(tree.Value)([value]);
}
return new(tree.Rule)('@' + k, value, false, 0);
});
frames = [new(tree.Ruleset)(null, variables)];
}
try {
var css = evaluate.call(this, { frames: frames })
.toCSS([], { compress: options.compress || false, dumpLineNumbers: env.dumpLineNumbers });
} catch (e) {
throw new(LessError)(e, env);
}
if ((importError = parser.imports.error)) { // Check if there was an error during importing
if (importError instanceof LessError) throw importError;
else throw new(LessError)(importError, env);
}
if (options.yuicompress && less.mode === 'node') {
return require('ycssmin').cssmin(css);
} else if (options.compress) {
return css.replace(/(\s)+/g, "$1");
} else {
return css;
}
};
})(root.eval);
// If `i` is smaller than the `input.length - 1`,
// it means the parser wasn't able to parse the whole
// string, so we've got a parsing error.
//
// We try to extract a \n delimited string,
// showing the line where the parse error occured.
// We split it up into two parts (the part which parsed,
// and the part which didn't), so we can color them differently.
if (i < input.length - 1) {
i = furthest;
lines = input.split('\n');
line = (input.slice(0, i).match(/\n/g) || "").length + 1;
for (var n = i, column = -1; n >= 0 && input.charAt(n) !== '\n'; n--) { column++ }
error = {
type: "Parse",
message: "Syntax Error on line " + line,
index: i,
filename: env.filename,
line: line,
column: column,
extract: [
lines[line - 2],
lines[line - 1],
lines[line]
]
};
}
if (this.imports.queue.length > 0) {
finish = function (e) {
e = error || e;
if (e) callback(e);
else callback(null, root);
};
} else {
callback(error, root);
}
},
//
// Here in, the parsing rules/functions
//
// The basic structure of the syntax tree generated is as follows:
//
// Ruleset -> Rule -> Value -> Expression -> Entity
//
// Here's some LESS code:
//
// .class {
// color: #fff;
// border: 1px solid #000;
// width: @w + 4px;
// > .child {...}
// }
//
// And here's what the parse tree might look like:
//
// Ruleset (Selector '.class', [
// Rule ("color", Value ([Expression [Color #fff]]))
// Rule ("border", Value ([Expression [Dimension 1px][Keyword "solid"][Color #000]]))
// Rule ("width", Value ([Expression [Operation "+" [Variable "@w"][Dimension 4px]]]))
// Ruleset (Selector [Element '>', '.child'], [...])
// ])
//
// In general, most rules will try to parse a token with the `$()` function, and if the return
// value is truly, will return a new node, of the relevant type. Sometimes, we need to check
// first, before parsing, that's when we use `peek()`.
//
parsers: {
//
// The `primary` rule is the *entry* and *exit* point of the parser.
// The rules here can appear at any level of the parse tree.
//
// The recursive nature of the grammar is an interplay between the `block`
// rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule,
// as represented by this simplified grammar:
//
// primary → (ruleset | rule)+
// ruleset → selector+ block
// block → '{' primary '}'
//
// Only at one point is the primary rule not called from the
// block rule: at the root level.
//
primary: function () {
var node, root = [];
while ((node = $(this.mixin.definition) || $(this.rule) || $(this.ruleset) ||
$(this.mixin.call) || $(this.comment) || $(this.directive))
|| $(/^[\s\n]+/) || $(/^;+/)) {
node && root.push(node);
}
return root;
},
// We create a Comment node for CSS comments `/* */`,
// but keep the LeSS comments `//` silent, by just skipping
// over them.
comment: function () {
var comment;
if (input.charAt(i) !== '/') return;
if (input.charAt(i + 1) === '/') {
return new(tree.Comment)($(/^\/\/.*/), true);
} else if (comment = $(/^\/\*(?:[^*]|\*+[^\/*])*\*+\/\n?/)) {
return new(tree.Comment)(comment);
}
},
//
// Entities are tokens which can be found inside an Expression
//
entities: {
//
// A string, which supports escaping " and '
//
// "milky way" 'he\'s the one!'
//
quoted: function () {
var str, j = i, e;
if (input.charAt(j) === '~') { j++, e = true } // Escaped strings
if (input.charAt(j) !== '"' && input.charAt(j) !== "'") return;
e && $('~');
if (str = $(/^"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'/)) {
return new(tree.Quoted)(str[0], str[1] || str[2], e);
}
},
//
// A catch-all word, such as:
//
// black border-collapse
//
keyword: function () {
var k;
if (k = $(/^[_A-Za-z-][_A-Za-z0-9-]*/)) {
if (tree.colors.hasOwnProperty(k)) {
// detect named color
return new(tree.Color)(tree.colors[k].slice(1));
} else {
return new(tree.Keyword)(k);
}
}
},
//
// A function call
//
// rgb(255, 0, 255)
//
// We also try to catch IE's `alpha()`, but let the `alpha` parser
// deal with the details.
//
// The arguments are parsed with the `entities.arguments` parser.
//
call: function () {
var name, nameLC, args, alpha_ret, index = i;
if (! (name = /^([\w-]+|%|progid:[\w\.]+)\(/.exec(chunks[j]))) return;
name = name[1];
nameLC = name.toLowerCase();
if (nameLC === 'url') { return null }
else { i += name.length }
if (nameLC === 'alpha') {
alpha_ret = $(this.alpha);
if(typeof alpha_ret !== 'undefined') {
return alpha_ret;
}
}
$('('); // Parse the '(' and consume whitespace.
args = $(this.entities.arguments);
if (! $(')')) return;
if (name) { return new(tree.Call)(name, args, index, env.filename) }
},
arguments: function () {
var args = [], arg;
while (arg = $(this.entities.assignment) || $(this.expression)) {
args.push(arg);
if (! $(',')) { break }
}
return args;
},
literal: function () {
return $(this.entities.ratio) ||
$(this.entities.dimension) ||
$(this.entities.color) ||
$(this.entities.quoted) ||
$(this.entities.unicodeDescriptor);
},
// Assignments are argument entities for calls.
// They are present in ie filter properties as shown below.
//
// filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* )
//
assignment: function () {
var key, value;
if ((key = $(/^\w+(?=\s?=)/i)) && $('=') && (value = $(this.entity))) {
return new(tree.Assignment)(key, value);
}
},
//
// Parse url() tokens
//
// We use a specific rule for urls, because they don't really behave like
// standard function calls. The difference is that the argument doesn't have
// to be enclosed within a string, so it can't be parsed as an Expression.
//
url: function () {
var value;
if (input.charAt(i) !== 'u' || !$(/^url\(/)) return;
value = $(this.entities.quoted) || $(this.entities.variable) ||
$(/^(?:(?:\\[\(\)'"])|[^\(\)'"])+/) || "";
expect(')');
return new(tree.URL)((value.value != null || value instanceof tree.Variable)
? value : new(tree.Anonymous)(value), env.rootpath);
},
//
// A Variable entity, such as `@fink`, in
//
// width: @fink + 2px
//
// We use a different parser for variable definitions,
// see `parsers.variable`.
//
variable: function () {
var name, index = i;
if (input.charAt(i) === '@' && (name = $(/^@@?[\w-]+/))) {
return new(tree.Variable)(name, index, env.filename);
}
},
// A variable entity useing the protective {} e.g. @{var}
variableCurly: function () {
var name, curly, index = i;
if (input.charAt(i) === '@' && (curly = $(/^@\{([\w-]+)\}/))) {
return new(tree.Variable)("@" + curly[1], index, env.filename);
}
},
//
// A Hexadecimal color
//
// #4F3C2F
//
// `rgb` and `hsl` colors are parsed through the `entities.call` parser.
//
color: function () {
var rgb;
if (input.charAt(i) === '#' && (rgb = $(/^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})/))) {
return new(tree.Color)(rgb[1]);
}
},
//
// A Dimension, that is, a number and a unit
//
// 0.5em 95%
//
dimension: function () {
var value, c = input.charCodeAt(i);
//Is the first char of the dimension 0-9, '.', '+' or '-'
if ((c > 57 || c < 43) || c === 47 || c == 44) return;
if (value = $(/^([+-]?\d*\.?\d+)(px|%|em|pc|ex|in|deg|s|ms|pt|cm|mm|rad|grad|turn|dpi|dpcm|dppx|rem|vw|vh|vmin|vm|ch)?/)) {
return new(tree.Dimension)(value[1], value[2]);
}
},
//
// A Ratio
//
// 16/9
//
ratio: function () {
var value, c = input.charCodeAt(i);
if (c > 57 || c < 48) return;
if (value = $(/^(\d+\/\d+)/)) {
return new(tree.Ratio)(value[1]);
}
},
//
// A unicode descriptor, as is used in unicode-range
//
// U+0?? or U+00A1-00A9
//
unicodeDescriptor: function () {
var ud;
if (ud = $(/^U\+[0-9a-fA-F?]+(\-[0-9a-fA-F?]+)?/)) {
return new(tree.UnicodeDescriptor)(ud[0]);
}
},
//
// JavaScript code to be evaluated
//
// `window.location.href`
//
javascript: function () {
var str, j = i, e;
if (input.charAt(j) === '~') { j++, e = true } // Escaped strings
if (input.charAt(j) !== '`') { return }
e && $('~');
if (str = $(/^`([^`]*)`/)) {
return new(tree.JavaScript)(str[1], i, e);
}
}
},
//
// The variable part of a variable definition. Used in the `rule` parser
//
// @fink:
//
variable: function () {
var name;
if (input.charAt(i) === '@' && (name = $(/^(@[\w-]+)\s*:/))) { return name[1] }
},
//
// A font size/line-height shorthand
//
// small/12px
//
// We need to peek first, or we'll match on keywords and dimensions
//
shorthand: function () {
var a, b;
if (! peek(/^[@\w.%-]+\/[@\w.-]+/)) return;
save();
if ((a = $(this.entity)) && $('/') && (b = $(this.entity))) {
return new(tree.Shorthand)(a, b);
}
restore();
},
//
// Mixins
//
mixin: {
//
// A Mixin call, with an optional argument list
//
// #mixins > .square(#fff);
// .rounded(4px, black);
// .button;
//
// The `while` loop is there because mixins can be
// namespaced, but we only support the child and descendant
// selector for now.
//
call: function () {
var elements = [], e, c, argsSemiColon = [], argsComma = [], args, delim, arg, nameLoop, expressions, isSemiColonSeperated, expressionContainsNamed, index = i, s = input.charAt(i), name, value, important = false;
if (s !== '.' && s !== '#') { return }
save(); // stop us absorbing part of an invalid selector
while (e = $(/^[#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/)) {
elements.push(new(tree.Element)(c, e, i));
c = $('>');
}
if ($('(')) {
expressions = [];
while (arg = $(this.expression)) {
nameLoop = null;
value = arg;
// Variable
if (arg.value.length == 1) {
var val = arg.value[0];
if (val instanceof tree.Variable) {
if ($(':')) {
if (expressions.length > 0) {
if (isSemiColonSeperated) {
error("Cannot mix ; and , as delimiter types");
}
expressionContainsNamed = true;
}
value = expect(this.expression);
nameLoop = (name = val.name);
}
}
}
expressions.push(value);
argsComma.push({ name: nameLoop, value: value });
if ($(',')) {
continue;
}
if ($(';') || isSemiColonSeperated) {
if (expressionContainsNamed) {
error("Cannot mix ; and , as delimiter types");
}
isSemiColonSeperated = true;
if (expressions.length > 1) {
value = new(tree.Value)(expressions);
}
argsSemiColon.push({ name: name, value: value });
name = null;
expressions = [];
expressionContainsNamed = false;
}
}
expect(')');
}
args = isSemiColonSeperated ? argsSemiColon : argsComma;
if ($(this.important)) {
important = true;
}
if (elements.length > 0 && ($(';') || peek('}'))) {
return new(tree.mixin.Call)(elements, args, index, env.filename, important);
}
restore();
},
//
// A Mixin definition, with a list of parameters
//
// .rounded (@radius: 2px, @color) {
// ...
// }
//
// Until we have a finer grained state-machine, we have to
// do a look-ahead, to make sure we don't have a mixin call.
// See the `rule` function for more information.
//
// We start by matching `.rounded (`, and then proceed on to
// the argument list, which has optional default values.
// We store the parameters in `params`, with a `value` key,
// if there is a value, such as in the case of `@radius`.
//
// Once we've got our params list, and a closing `)`, we parse
// the `{...}` block.
//
definition: function () {
var name, params = [], match, ruleset, param, value, cond, variadic = false;
if ((input.charAt(i) !== '.' && input.charAt(i) !== '#') ||
peek(/^[^{]*\}/)) return;
save();
if (match = $(/^([#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\s*\(/)) {
name = match[1];
do {
$(this.comment);
if (input.charAt(i) === '.' && $(/^\.{3}/)) {
variadic = true;
params.push({ variadic: true });
break;
} else if (param = $(this.entities.variable) || $(this.entities.literal)
|| $(this.entities.keyword)) {
// Variable
if (param instanceof tree.Variable) {
if ($(':')) {
value = expect(this.expression, 'expected expression');
params.push({ name: param.name, value: value });
} else if ($(/^\.{3}/)) {
params.push({ name: param.name, variadic: true });
variadic = true;
break;
} else {
params.push({ name: param.name });
}
} else {
params.push({ value: param });
}
} else {
break;
}
} while ($(',') || $(';'))
// .mixincall("@{a}");
// looks a bit like a mixin definition.. so we have to be nice and restore
if (!$(')')) {
furthest = i;
restore();
}
$(this.comment);
if ($(/^when/)) { // Guard
cond = expect(this.conditions, 'expected condition');
}
ruleset = $(this.block);
if (ruleset) {
return new(tree.mixin.Definition)(name, params, ruleset, cond, variadic);
} else {
restore();
}
}
}
},
//
// Entities are the smallest recognized token,
// and can be found inside a rule's value.
//
entity: function () {
return $(this.entities.literal) || $(this.entities.variable) || $(this.entities.url) ||
$(this.entities.call) || $(this.entities.keyword) ||$(this.entities.javascript) ||
$(this.comment);
},
//
// A Rule terminator. Note that we use `peek()` to check for '}',
// because the `block` rule will be expecting it, but we still need to make sure
// it's there, if ';' was ommitted.
//
end: function () {
return $(';') || peek('}');
},
//
// IE's alpha function
//
// alpha(opacity=88)
//
alpha: function () {
var value;
if (! $(/^\(opacity=/i)) return;
if (value = $(/^\d+/) || $(this.entities.variable)) {
expect(')');
return new(tree.Alpha)(value);
}
},
//
// A Selector Element
//
// div
// + h1
// #socks
// input[type="text"]
//
// Elements are the building blocks for Selectors,
// they are made out of a `Combinator` (see combinator rule),
// and an element name, such as a tag a class, or `*`.
//
element: function () {
var e, t, c, v;
c = $(this.combinator);
e = $(/^(?:\d+\.\d+|\d+)%/) || $(/^(?:[.#]?|:*)(?:[\w-]|[^\x00-\x9f]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) ||
$('*') || $('&') || $(this.attribute) || $(/^\([^()@]+\)/) || $(/^[\.#](?=@)/) || $(this.entities.variableCurly);
if (! e) {
if ($('(')) {
if ((v = ($(this.entities.variableCurly) ||
$(this.entities.variable) ||
$(this.selector))) &&
$(')')) {
e = new(tree.Paren)(v);
}
}
}
if (e) { return new(tree.Element)(c, e, i) }
},
//
// Combinators combine elements together, in a Selector.
//
// Because our parser isn't white-space sensitive, special care
// has to be taken, when parsing the descendant combinator, ` `,
// as it's an empty space. We have to check the previous character
// in the input, to see if it's a ` ` character. More info on how
// we deal with this in *combinator.js*.
//
combinator: function () {
var match, c = input.charAt(i);
if (c === '>' || c === '+' || c === '~' || c === '|') {
i++;
while (input.charAt(i).match(/\s/)) { i++ }
return new(tree.Combinator)(c);
} else if (input.charAt(i - 1).match(/\s/)) {
return new(tree.Combinator)(" ");
} else {
return new(tree.Combinator)(null);
}
},
//
// A CSS Selector
//
// .class > div + h1
// li a:hover
//
// Selectors are made out of one or more Elements, see above.
//
selector: function () {
var sel, e, elements = [], c, match;
// depreciated, will be removed soon
if ($('(')) {
sel = $(this.entity);
if (!$(')')) { return null; }
return new(tree.Selector)([new(tree.Element)('', sel, i)]);
}
while (e = $(this.element)) {
c = input.charAt(i);
elements.push(e)
if (c === '{' || c === '}' || c === ';' || c === ',' || c === ')') { break }
}
if (elements.length > 0) { return new(tree.Selector)(elements) }
},
attribute: function () {
var attr = '', key, val, op;
if (! $('[')) return;
if (key = $(/^(?:[_A-Za-z0-9-]|\\.)+/) || $(this.entities.quoted)) {
if ((op = $(/^[|~*$^]?=/)) &&
(val = $(this.entities.quoted) || $(/^[\w-]+/))) {
attr = [key, op, val.toCSS ? val.toCSS() : val].join('');
} else { attr = key }
}
if (! $(']')) return;
if (attr) { return "[" + attr + "]" }
},
//
// The `block` rule is used by `ruleset` and `mixin.definition`.
// It's a wrapper around the `primary` rule, with added `{}`.
//
block: function () {
var content;
if ($('{') && (content = $(this.primary)) && $('}')) {
return content;
}
},
//
// div, .class, body > p {...}
//
ruleset: function () {
var selectors = [], s, rules, match, debugInfo;
save();
if (env.dumpLineNumbers)
debugInfo = getDebugInfo(i, input, env);
while (s = $(this.selector)) {
selectors.push(s);
$(this.comment);
if (! $(',')) { break }
$(this.comment);
}
if (selectors.length > 0 && (rules = $(this.block))) {
var ruleset = new(tree.Ruleset)(selectors, rules, env.strictImports);
if (env.dumpLineNumbers)
ruleset.debugInfo = debugInfo;
return ruleset;
} else {
// Backtrack
furthest = i;
restore();
}
},
rule: function () {
var name, value, c = input.charAt(i), important, match;
save();
if (c === '.' || c === '#' || c === '&') { return }
if (name = $(this.variable) || $(this.property)) {
if ((name.charAt(0) != '@') && (match = /^([^@+\/'"*`(;{}-]*);/.exec(chunks[j]))) {
i += match[0].length - 1;
value = new(tree.Anonymous)(match[1]);
} else if (name === "font") {
value = $(this.font);
} else {
value = $(this.value);
}
important = $(this.important);
if (value && $(this.end)) {
return new(tree.Rule)(name, value, important, memo);
} else {
furthest = i;
restore();
}
}
},
//
// An @import directive
//
// @import "lib";
//
// Depending on our environemnt, importing is done differently:
// In the browser, it's an XHR request, in Node, it would be a
// file-system operation. The function used for importing is
// stored in `import`, which we pass to the Import constructor.
//
"import": function () {
var path, features, index = i;
save();
var dir = $(/^@import(?:-(once))?\s+/);
if (dir && (path = $(this.entities.quoted) || $(this.entities.url))) {
features = $(this.mediaFeatures);
if ($(';')) {
return new(tree.Import)(path, imports, features, (dir[1] === 'once'), index, env.rootpath);
}
}
restore();
},
mediaFeature: function () {
var e, p, nodes = [];
do {
if (e = $(this.entities.keyword)) {
nodes.push(e);
} else if ($('(')) {
p = $(this.property);
e = $(this.entity);
if ($(')')) {
if (p && e) {
nodes.push(new(tree.Paren)(new(tree.Rule)(p, e, null, i, true)));
} else if (e) {
nodes.push(new(tree.Paren)(e));
} else {
return null;
}
} else { return null }
}
} while (e);
if (nodes.length > 0) {
return new(tree.Expression)(nodes);
}
},
mediaFeatures: function () {
var e, features = [];
do {
if (e = $(this.mediaFeature)) {
features.push(e);
if (! $(',')) { break }
} else if (e = $(this.entities.variable)) {
features.push(e);
if (! $(',')) { break }
}
} while (e);
return features.length > 0 ? features : null;
},
media: function () {
var features, rules, media, debugInfo;
if (env.dumpLineNumbers)
debugInfo = getDebugInfo(i, input, env);
if ($(/^@media/)) {
features = $(this.mediaFeatures);
if (rules = $(this.block)) {
media = new(tree.Media)(rules, features);
if(env.dumpLineNumbers)
media.debugInfo = debugInfo;
return media;
}
}
},
//
// A CSS Directive
//
// @charset "utf-8";
//
directive: function () {
var name, value, rules, identifier, e, nodes, nonVendorSpecificName,
hasBlock, hasIdentifier, hasExpression;
if (input.charAt(i) !== '@') return;
if (value = $(this['import']) || $(this.media)) {
return value;
}
save();
name = $(/^@[a-z-]+/);
if (!name) return;
nonVendorSpecificName = name;
if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) {
nonVendorSpecificName = "@" + name.slice(name.indexOf('-', 2) + 1);
}
switch(nonVendorSpecificName) {
case "@font-face":
hasBlock = true;
break;
case "@viewport":
case "@top-left":
case "@top-left-corner":
case "@top-center":
case "@top-right":
case "@top-right-corner":
case "@bottom-left":
case "@bottom-left-corner":
case "@bottom-center":
case "@bottom-right":
case "@bottom-right-corner":
case "@left-top":
case "@left-middle":
case "@left-bottom":
case "@right-top":
case "@right-middle":
case "@right-bottom":
hasBlock = true;
break;
case "@page":
case "@document":
case "@supports":
case "@keyframes":
hasBlock = true;
hasIdentifier = true;
break;
case "@namespace":
hasExpression = true;
break;
}
if (hasIdentifier) {
name += " " + ($(/^[^{]+/) || '').trim();
}
if (hasBlock)
{
if (rules = $(this.block)) {
return new(tree.Directive)(name, rules);
}
} else {
if ((value = hasExpression ? $(this.expression) : $(this.entity)) && $(';')) {
var directive = new(tree.Directive)(name, value);
if (env.dumpLineNumbers) {
directive.debugInfo = getDebugInfo(i, input, env);
}
return directive;
}
}
restore();
},
font: function () {
var value = [], expression = [], weight, shorthand, font, e;
while (e = $(this.shorthand) || $(this.entity)) {
expression.push(e);
}
value.push(new(tree.Expression)(expression));
if ($(',')) {
while (e = $(this.expression)) {
value.push(e);
if (! $(',')) { break }
}
}
return new(tree.Value)(value);
},
//
// A Value is a comma-delimited list of Expressions
//
// font-family: Baskerville, Georgia, serif;
//
// In a Rule, a Value represents everything after the `:`,
// and before the `;`.
//
value: function () {
var e, expressions = [], important;
while (e = $(this.expression)) {
expressions.push(e);
if (! $(',')) { break }
}
if (expressions.length > 0) {
return new(tree.Value)(expressions);
}
},
important: function () {
if (input.charAt(i) === '!') {
return $(/^! *important/);
}
},
sub: function () {
var e;
if ($('(') && (e = $(this.expression)) && $(')')) {
return e;
}
},
multiplication: function () {
var m, a, op, operation;
if (m = $(this.operand)) {
while (!peek(/^\/[*\/]/) && (op = ($('/') || $('*'))) && (a = $(this.operand))) {
operation = new(tree.Operation)(op, [operation || m, a]);
}
return operation || m;
}
},
addition: function () {
var m, a, op, operation;
if (m = $(this.multiplication)) {
while ((op = $(/^[-+]\s+/) || (!isWhitespace(input.charAt(i - 1)) && ($('+') || $('-')))) &&
(a = $(this.multiplication))) {
operation = new(tree.Operation)(op, [operation || m, a]);
}
return operation || m;
}
},
conditions: function () {
var a, b, index = i, condition;
if (a = $(this.condition)) {
while ($(',') && (b = $(this.condition))) {
condition = new(tree.Condition)('or', condition || a, b, index);
}
return condition || a;
}
},
condition: function () {
var a, b, c, op, index = i, negate = false;
if ($(/^not/)) { negate = true }
expect('(');
if (a = $(this.addition) || $(this.entities.keyword) || $(this.entities.quoted)) {
if (op = $(/^(?:>=|=<|[<=>])/)) {
if (b = $(this.addition) || $(this.entities.keyword) || $(this.entities.quoted)) {
c = new(tree.Condition)(op, a, b, index, negate);
} else {
error('expected expression');
}
} else {
c = new(tree.Condition)('=', a, new(tree.Keyword)('true'), index, negate);
}
expect(')');
return $(/^and/) ? new(tree.Condition)('and', c, $(this.condition)) : c;
}
},
//
// An operand is anything that can be part of an operation,
// such as a Color, or a Variable
//
operand: function () {
var negate, p = input.charAt(i + 1);
if (input.charAt(i) === '-' && (p === '@' || p === '(')) { negate = $('-') }
var o = $(this.sub) || $(this.entities.dimension) ||
$(this.entities.color) || $(this.entities.variable) ||
$(this.entities.call);
return negate ? new(tree.Operation)('*', [new(tree.Dimension)(-1), o])
: o;
},
//
// Expressions either represent mathematical operations,
// or white-space delimited Entities.
//
// 1px solid black
// @var * 2
//
expression: function () {
var e, delim, entities = [], d;
while (e = $(this.addition) || $(this.entity)) {
entities.push(e);
}
if (entities.length > 0) {
return new(tree.Expression)(entities);
}
},
property: function () {
var name;
if (name = $(/^(\*?-?[_a-z0-9-]+)\s*:/)) {
return name[1];
}
}
}
};
};
if (less.mode === 'browser' || less.mode === 'rhino') {
//
// Used by `@import` directives
//
less.Parser.importer = function (path, paths, callback, env) {
if (!/^([a-z-]+:)?\//.test(path) && paths.length > 0) {
path = paths[0] + path;
}
// We pass `true` as 3rd argument, to force the reload of the import.
// This is so we can get the syntax tree as opposed to just the CSS output,
// as we need this to evaluate the current stylesheet.
loadStyleSheet({
href: path,
title: path,
type: env.mime,
contents: env.contents,
files: env.files,
rootpath: env.rootpath,
entryPath: env.entryPath,
relativeUrls: env.relativeUrls },
function (e, root, data, sheet, _, path) {
if (e && typeof(env.errback) === "function") {
env.errback.call(null, path, paths, callback, env);
} else {
callback.call(null, e, root, path);
}
}, true);
};
}
(function (tree) {
tree.functions = {
rgb: function (r, g, b) {
return this.rgba(r, g, b, 1.0);
},
rgba: function (r, g, b, a) {
var rgb = [r, g, b].map(function (c) { return scaled(c, 256); });
a = number(a);
return new(tree.Color)(rgb, a);
},
hsl: function (h, s, l) {
return this.hsla(h, s, l, 1.0);
},
hsla: function (h, s, l, a) {
h = (number(h) % 360) / 360;
s = number(s); l = number(l); a = number(a);
var m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s;
var m1 = l * 2 - m2;
return this.rgba(hue(h + 1/3) * 255,
hue(h) * 255,
hue(h - 1/3) * 255,
a);
function hue(h) {
h = h < 0 ? h + 1 : (h > 1 ? h - 1 : h);
if (h * 6 < 1) return m1 + (m2 - m1) * h * 6;
else if (h * 2 < 1) return m2;
else if (h * 3 < 2) return m1 + (m2 - m1) * (2/3 - h) * 6;
else return m1;
}
},
hsv: function(h, s, v) {
return this.hsva(h, s, v, 1.0);
},
hsva: function(h, s, v, a) {
h = ((number(h) % 360) / 360) * 360;
s = number(s); v = number(v); a = number(a);
var i, f;
i = Math.floor((h / 60) % 6);
f = (h / 60) - i;
var vs = [v,
v * (1 - s),
v * (1 - f * s),
v * (1 - (1 - f) * s)];
var perm = [[0, 3, 1],
[2, 0, 1],
[1, 0, 3],
[1, 2, 0],
[3, 1, 0],
[0, 1, 2]];
return this.rgba(vs[perm[i][0]] * 255,
vs[perm[i][1]] * 255,
vs[perm[i][2]] * 255,
a);
},
hue: function (color) {
return new(tree.Dimension)(Math.round(color.toHSL().h));
},
saturation: function (color) {
return new(tree.Dimension)(Math.round(color.toHSL().s * 100), '%');
},
lightness: function (color) {
return new(tree.Dimension)(Math.round(color.toHSL().l * 100), '%');
},
red: function (color) {
return new(tree.Dimension)(color.rgb[0]);
},
green: function (color) {
return new(tree.Dimension)(color.rgb[1]);
},
blue: function (color) {
return new(tree.Dimension)(color.rgb[2]);
},
alpha: function (color) {
return new(tree.Dimension)(color.toHSL().a);
},
luma: function (color) {
return new(tree.Dimension)(Math.round((0.2126 * (color.rgb[0]/255) +
0.7152 * (color.rgb[1]/255) +
0.0722 * (color.rgb[2]/255)) *
color.alpha * 100), '%');
},
saturate: function (color, amount) {
var hsl = color.toHSL();
hsl.s += amount.value / 100;
hsl.s = clamp(hsl.s);
return hsla(hsl);
},
desaturate: function (color, amount) {
var hsl = color.toHSL();
hsl.s -= amount.value / 100;
hsl.s = clamp(hsl.s);
return hsla(hsl);
},
lighten: function (color, amount) {
var hsl = color.toHSL();
hsl.l += amount.value / 100;
hsl.l = clamp(hsl.l);
return hsla(hsl);
},
darken: function (color, amount) {
var hsl = color.toHSL();
hsl.l -= amount.value / 100;
hsl.l = clamp(hsl.l);
return hsla(hsl);
},
fadein: function (color, amount) {
var hsl = color.toHSL();
hsl.a += amount.value / 100;
hsl.a = clamp(hsl.a);
return hsla(hsl);
},
fadeout: function (color, amount) {
var hsl = color.toHSL();
hsl.a -= amount.value / 100;
hsl.a = clamp(hsl.a);
return hsla(hsl);
},
fade: function (color, amount) {
var hsl = color.toHSL();
hsl.a = amount.value / 100;
hsl.a = clamp(hsl.a);
return hsla(hsl);
},
spin: function (color, amount) {
var hsl = color.toHSL();
var hue = (hsl.h + amount.value) % 360;
hsl.h = hue < 0 ? 360 + hue : hue;
return hsla(hsl);
},
//
// Copyright (c) 2006-2009 Hampton Catlin, Nathan Weizenbaum, and Chris Eppstein
// http://sass-lang.com
//
mix: function (color1, color2, weight) {
if (!weight) {
weight = new(tree.Dimension)(50);
}
var p = weight.value / 100.0;
var w = p * 2 - 1;
var a = color1.toHSL().a - color2.toHSL().a;
var w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0;
var w2 = 1 - w1;
var rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2,
color1.rgb[1] * w1 + color2.rgb[1] * w2,
color1.rgb[2] * w1 + color2.rgb[2] * w2];
var alpha = color1.alpha * p + color2.alpha * (1 - p);
return new(tree.Color)(rgb, alpha);
},
greyscale: function (color) {
return this.desaturate(color, new(tree.Dimension)(100));
},
contrast: function (color, dark, light, threshold) {
// filter: contrast(3.2);
// should be kept as is, so check for color
if (!color.rgb) {
return null;
}
if (typeof light === 'undefined') {
light = this.rgba(255, 255, 255, 1.0);
}
if (typeof dark === 'undefined') {
dark = this.rgba(0, 0, 0, 1.0);
}
if (typeof threshold === 'undefined') {
threshold = 0.43;
} else {
threshold = threshold.value;
}
if (((0.2126 * (color.rgb[0]/255) + 0.7152 * (color.rgb[1]/255) + 0.0722 * (color.rgb[2]/255)) * color.alpha) < threshold) {
return light;
} else {
return dark;
}
},
e: function (str) {
return new(tree.Anonymous)(str instanceof tree.JavaScript ? str.evaluated : str);
},
escape: function (str) {
return new(tree.Anonymous)(encodeURI(str.value).replace(/=/g, "%3D").replace(/:/g, "%3A").replace(/#/g, "%23").replace(/;/g, "%3B").replace(/\(/g, "%28").replace(/\)/g, "%29"));
},
'%': function (quoted /* arg, arg, ...*/) {
var args = Array.prototype.slice.call(arguments, 1),
str = quoted.value;
for (var i = 0; i < args.length; i++) {
str = str.replace(/%[sda]/i, function(token) {
var value = token.match(/s/i) ? args[i].value : args[i].toCSS();
return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value;
});
}
str = str.replace(/%%/g, '%');
return new(tree.Quoted)('"' + str + '"', str);
},
unit: function (val, unit) {
return new(tree.Dimension)(val.value, unit ? unit.toCSS() : "");
},
round: function (n, f) {
var fraction = typeof(f) === "undefined" ? 0 : f.value;
return this._math(function(num) { return num.toFixed(fraction); }, n);
},
ceil: function (n) {
return this._math(Math.ceil, n);
},
floor: function (n) {
return this._math(Math.floor, n);
},
_math: function (fn, n) {
if (n instanceof tree.Dimension) {
return new(tree.Dimension)(fn(parseFloat(n.value)), n.unit);
} else if (typeof(n) === 'number') {
return fn(n);
} else {
throw { type: "Argument", message: "argument must be a number" };
}
},
argb: function (color) {
return new(tree.Anonymous)(color.toARGB());
},
percentage: function (n) {
return new(tree.Dimension)(n.value * 100, '%');
},
color: function (n) {
if (n instanceof tree.Quoted) {
return new(tree.Color)(n.value.slice(1));
} else {
throw { type: "Argument", message: "argument must be a string" };
}
},
iscolor: function (n) {
return this._isa(n, tree.Color);
},
isnumber: function (n) {
return this._isa(n, tree.Dimension);
},
isstring: function (n) {
return this._isa(n, tree.Quoted);
},
iskeyword: function (n) {
return this._isa(n, tree.Keyword);
},
isurl: function (n) {
return this._isa(n, tree.URL);
},
ispixel: function (n) {
return (n instanceof tree.Dimension) && n.unit === 'px' ? tree.True : tree.False;
},
ispercentage: function (n) {
return (n instanceof tree.Dimension) && n.unit === '%' ? tree.True : tree.False;
},
isem: function (n) {
return (n instanceof tree.Dimension) && n.unit === 'em' ? tree.True : tree.False;
},
_isa: function (n, Type) {
return (n instanceof Type) ? tree.True : tree.False;
},
/* Blending modes */
multiply: function(color1, color2) {
var r = color1.rgb[0] * color2.rgb[0] / 255;
var g = color1.rgb[1] * color2.rgb[1] / 255;
var b = color1.rgb[2] * color2.rgb[2] / 255;
return this.rgb(r, g, b);
},
screen: function(color1, color2) {
var r = 255 - (255 - color1.rgb[0]) * (255 - color2.rgb[0]) / 255;
var g = 255 - (255 - color1.rgb[1]) * (255 - color2.rgb[1]) / 255;
var b = 255 - (255 - color1.rgb[2]) * (255 - color2.rgb[2]) / 255;
return this.rgb(r, g, b);
},
overlay: function(color1, color2) {
var r = color1.rgb[0] < 128 ? 2 * color1.rgb[0] * color2.rgb[0] / 255 : 255 - 2 * (255 - color1.rgb[0]) * (255 - color2.rgb[0]) / 255;
var g = color1.rgb[1] < 128 ? 2 * color1.rgb[1] * color2.rgb[1] / 255 : 255 - 2 * (255 - color1.rgb[1]) * (255 - color2.rgb[1]) / 255;
var b = color1.rgb[2] < 128 ? 2 * color1.rgb[2] * color2.rgb[2] / 255 : 255 - 2 * (255 - color1.rgb[2]) * (255 - color2.rgb[2]) / 255;
return this.rgb(r, g, b);
},
softlight: function(color1, color2) {
var t = color2.rgb[0] * color1.rgb[0] / 255;
var r = t + color1.rgb[0] * (255 - (255 - color1.rgb[0]) * (255 - color2.rgb[0]) / 255 - t) / 255;
t = color2.rgb[1] * color1.rgb[1] / 255;
var g = t + color1.rgb[1] * (255 - (255 - color1.rgb[1]) * (255 - color2.rgb[1]) / 255 - t) / 255;
t = color2.rgb[2] * color1.rgb[2] / 255;
var b = t + color1.rgb[2] * (255 - (255 - color1.rgb[2]) * (255 - color2.rgb[2]) / 255 - t) / 255;
return this.rgb(r, g, b);
},
hardlight: function(color1, color2) {
var r = color2.rgb[0] < 128 ? 2 * color2.rgb[0] * color1.rgb[0] / 255 : 255 - 2 * (255 - color2.rgb[0]) * (255 - color1.rgb[0]) / 255;
var g = color2.rgb[1] < 128 ? 2 * color2.rgb[1] * color1.rgb[1] / 255 : 255 - 2 * (255 - color2.rgb[1]) * (255 - color1.rgb[1]) / 255;
var b = color2.rgb[2] < 128 ? 2 * color2.rgb[2] * color1.rgb[2] / 255 : 255 - 2 * (255 - color2.rgb[2]) * (255 - color1.rgb[2]) / 255;
return this.rgb(r, g, b);
},
difference: function(color1, color2) {
var r = Math.abs(color1.rgb[0] - color2.rgb[0]);
var g = Math.abs(color1.rgb[1] - color2.rgb[1]);
var b = Math.abs(color1.rgb[2] - color2.rgb[2]);
return this.rgb(r, g, b);
},
exclusion: function(color1, color2) {
var r = color1.rgb[0] + color2.rgb[0] * (255 - color1.rgb[0] - color1.rgb[0]) / 255;
var g = color1.rgb[1] + color2.rgb[1] * (255 - color1.rgb[1] - color1.rgb[1]) / 255;
var b = color1.rgb[2] + color2.rgb[2] * (255 - color1.rgb[2] - color1.rgb[2]) / 255;
return this.rgb(r, g, b);
},
average: function(color1, color2) {
var r = (color1.rgb[0] + color2.rgb[0]) / 2;
var g = (color1.rgb[1] + color2.rgb[1]) / 2;
var b = (color1.rgb[2] + color2.rgb[2]) / 2;
return this.rgb(r, g, b);
},
negation: function(color1, color2) {
var r = 255 - Math.abs(255 - color2.rgb[0] - color1.rgb[0]);
var g = 255 - Math.abs(255 - color2.rgb[1] - color1.rgb[1]);
var b = 255 - Math.abs(255 - color2.rgb[2] - color1.rgb[2]);
return this.rgb(r, g, b);
},
tint: function(color, amount) {
return this.mix(this.rgb(255,255,255), color, amount);
},
shade: function(color, amount) {
return this.mix(this.rgb(0, 0, 0), color, amount);
}
};
function hsla(color) {
return tree.functions.hsla(color.h, color.s, color.l, color.a);
}
function scaled(n, size) {
if (n instanceof tree.Dimension && n.unit == '%') {
return parseFloat(n.value * size / 100);
} else {
return number(n);
}
}
function number(n) {
if (n instanceof tree.Dimension) {
return parseFloat(n.unit == '%' ? n.value / 100 : n.value);
} else if (typeof(n) === 'number') {
return n;
} else {
throw {
error: "RuntimeError",
message: "color functions take numbers as parameters"
};
}
}
function clamp(val) {
return Math.min(1, Math.max(0, val));
}
})(require('./tree'));
(function (tree) {
tree.colors = {
'aliceblue':'#f0f8ff',
'antiquewhite':'#faebd7',
'aqua':'#00ffff',
'aquamarine':'#7fffd4',
'azure':'#f0ffff',
'beige':'#f5f5dc',
'bisque':'#ffe4c4',
'black':'#000000',
'blanchedalmond':'#ffebcd',
'blue':'#0000ff',
'blueviolet':'#8a2be2',
'brown':'#a52a2a',
'burlywood':'#deb887',
'cadetblue':'#5f9ea0',
'chartreuse':'#7fff00',
'chocolate':'#d2691e',
'coral':'#ff7f50',
'cornflowerblue':'#6495ed',
'cornsilk':'#fff8dc',
'crimson':'#dc143c',
'cyan':'#00ffff',
'darkblue':'#00008b',
'darkcyan':'#008b8b',
'darkgoldenrod':'#b8860b',
'darkgray':'#a9a9a9',
'darkgrey':'#a9a9a9',
'darkgreen':'#006400',
'darkkhaki':'#bdb76b',
'darkmagenta':'#8b008b',
'darkolivegreen':'#556b2f',
'darkorange':'#ff8c00',
'darkorchid':'#9932cc',
'darkred':'#8b0000',
'darksalmon':'#e9967a',
'darkseagreen':'#8fbc8f',
'darkslateblue':'#483d8b',
'darkslategray':'#2f4f4f',
'darkslategrey':'#2f4f4f',
'darkturquoise':'#00ced1',
'darkviolet':'#9400d3',
'deeppink':'#ff1493',
'deepskyblue':'#00bfff',
'dimgray':'#696969',
'dimgrey':'#696969',
'dodgerblue':'#1e90ff',
'firebrick':'#b22222',
'floralwhite':'#fffaf0',
'forestgreen':'#228b22',
'fuchsia':'#ff00ff',
'gainsboro':'#dcdcdc',
'ghostwhite':'#f8f8ff',
'gold':'#ffd700',
'goldenrod':'#daa520',
'gray':'#808080',
'grey':'#808080',
'green':'#008000',
'greenyellow':'#adff2f',
'honeydew':'#f0fff0',
'hotpink':'#ff69b4',
'indianred':'#cd5c5c',
'indigo':'#4b0082',
'ivory':'#fffff0',
'khaki':'#f0e68c',
'lavender':'#e6e6fa',
'lavenderblush':'#fff0f5',
'lawngreen':'#7cfc00',
'lemonchiffon':'#fffacd',
'lightblue':'#add8e6',
'lightcoral':'#f08080',
'lightcyan':'#e0ffff',
'lightgoldenrodyellow':'#fafad2',
'lightgray':'#d3d3d3',
'lightgrey':'#d3d3d3',
'lightgreen':'#90ee90',
'lightpink':'#ffb6c1',
'lightsalmon':'#ffa07a',
'lightseagreen':'#20b2aa',
'lightskyblue':'#87cefa',
'lightslategray':'#778899',
'lightslategrey':'#778899',
'lightsteelblue':'#b0c4de',
'lightyellow':'#ffffe0',
'lime':'#00ff00',
'limegreen':'#32cd32',
'linen':'#faf0e6',
'magenta':'#ff00ff',
'maroon':'#800000',
'mediumaquamarine':'#66cdaa',
'mediumblue':'#0000cd',
'mediumorchid':'#ba55d3',
'mediumpurple':'#9370d8',
'mediumseagreen':'#3cb371',
'mediumslateblue':'#7b68ee',
'mediumspringgreen':'#00fa9a',
'mediumturquoise':'#48d1cc',
'mediumvioletred':'#c71585',
'midnightblue':'#191970',
'mintcream':'#f5fffa',
'mistyrose':'#ffe4e1',
'moccasin':'#ffe4b5',
'navajowhite':'#ffdead',
'navy':'#000080',
'oldlace':'#fdf5e6',
'olive':'#808000',
'olivedrab':'#6b8e23',
'orange':'#ffa500',
'orangered':'#ff4500',
'orchid':'#da70d6',
'palegoldenrod':'#eee8aa',
'palegreen':'#98fb98',
'paleturquoise':'#afeeee',
'palevioletred':'#d87093',
'papayawhip':'#ffefd5',
'peachpuff':'#ffdab9',
'peru':'#cd853f',
'pink':'#ffc0cb',
'plum':'#dda0dd',
'powderblue':'#b0e0e6',
'purple':'#800080',
'red':'#ff0000',
'rosybrown':'#bc8f8f',
'royalblue':'#4169e1',
'saddlebrown':'#8b4513',
'salmon':'#fa8072',
'sandybrown':'#f4a460',
'seagreen':'#2e8b57',
'seashell':'#fff5ee',
'sienna':'#a0522d',
'silver':'#c0c0c0',
'skyblue':'#87ceeb',
'slateblue':'#6a5acd',
'slategray':'#708090',
'slategrey':'#708090',
'snow':'#fffafa',
'springgreen':'#00ff7f',
'steelblue':'#4682b4',
'tan':'#d2b48c',
'teal':'#008080',
'thistle':'#d8bfd8',
'tomato':'#ff6347',
// 'transparent':'rgba(0,0,0,0)',
'turquoise':'#40e0d0',
'violet':'#ee82ee',
'wheat':'#f5deb3',
'white':'#ffffff',
'whitesmoke':'#f5f5f5',
'yellow':'#ffff00',
'yellowgreen':'#9acd32'
};
})(require('./tree'));
(function (tree) {
tree.Alpha = function (val) {
this.value = val;
};
tree.Alpha.prototype = {
toCSS: function () {
return "alpha(opacity=" +
(this.value.toCSS ? this.value.toCSS() : this.value) + ")";
},
eval: function (env) {
if (this.value.eval) { this.value = this.value.eval(env) }
return this;
}
};
})(require('../tree'));
(function (tree) {
tree.Anonymous = function (string) {
this.value = string.value || string;
};
tree.Anonymous.prototype = {
toCSS: function () {
return this.value;
},
eval: function () { return this },
compare: function (x) {
if (!x.toCSS) {
return -1;
}
var left = this.toCSS(),
right = x.toCSS();
if (left === right) {
return 0;
}
return left < right ? -1 : 1;
}
};
})(require('../tree'));
(function (tree) {
tree.Assignment = function (key, val) {
this.key = key;
this.value = val;
};
tree.Assignment.prototype = {
toCSS: function () {
return this.key + '=' + (this.value.toCSS ? this.value.toCSS() : this.value);
},
eval: function (env) {
if (this.value.eval) {
return new(tree.Assignment)(this.key, this.value.eval(env));
}
return this;
}
};
})(require('../tree'));(function (tree) {
//
// A function call node.
//
tree.Call = function (name, args, index, filename) {
this.name = name;
this.args = args;
this.index = index;
this.filename = filename;
};
tree.Call.prototype = {
//
// When evaluating a function call,
// we either find the function in `tree.functions` [1],
// in which case we call it, passing the evaluated arguments,
// if this returns null or we cannot find the function, we
// simply print it out as it appeared originally [2].
//
// The *functions.js* file contains the built-in functions.
//
// The reason why we evaluate the arguments, is in the case where
// we try to pass a variable to a function, like: `saturate(@color)`.
// The function should receive the value, not the variable.
//
eval: function (env) {
var args = this.args.map(function (a) { return a.eval(env) }),
result;
if (this.name in tree.functions) { // 1.
try {
result = tree.functions[this.name].apply(tree.functions, args);
if (result != null) {
return result;
}
} catch (e) {
throw { type: e.type || "Runtime",
message: "error evaluating function `" + this.name + "`" +
(e.message ? ': ' + e.message : ''),
index: this.index, filename: this.filename };
}
}
// 2.
return new(tree.Anonymous)(this.name +
"(" + args.map(function (a) { return a.toCSS(env) }).join(', ') + ")");
},
toCSS: function (env) {
return this.eval(env).toCSS();
}
};
})(require('../tree'));
(function (tree) {
//
// RGB Colors - #ff0014, #eee
//
tree.Color = function (rgb, a) {
//
// The end goal here, is to parse the arguments
// into an integer triplet, such as `128, 255, 0`
//
// This facilitates operations and conversions.
//
if (Array.isArray(rgb)) {
this.rgb = rgb;
} else if (rgb.length == 6) {
this.rgb = rgb.match(/.{2}/g).map(function (c) {
return parseInt(c, 16);
});
} else {
this.rgb = rgb.split('').map(function (c) {
return parseInt(c + c, 16);
});
}
this.alpha = typeof(a) === 'number' ? a : 1;
};
tree.Color.prototype = {
eval: function () { return this },
//
// If we have some transparency, the only way to represent it
// is via `rgba`. Otherwise, we use the hex representation,
// which has better compatibility with older browsers.
// Values are capped between `0` and `255`, rounded and zero-padded.
//
toCSS: function () {
if (this.alpha < 1.0) {
return "rgba(" + this.rgb.map(function (c) {
return Math.round(c);
}).concat(this.alpha).join(', ') + ")";
} else {
return '#' + this.rgb.map(function (i) {
i = Math.round(i);
i = (i > 255 ? 255 : (i < 0 ? 0 : i)).toString(16);
return i.length === 1 ? '0' + i : i;
}).join('');
}
},
//
// Operations have to be done per-channel, if not,
// channels will spill onto each other. Once we have
// our result, in the form of an integer triplet,
// we create a new Color node to hold the result.
//
operate: function (op, other) {
var result = [];
if (! (other instanceof tree.Color)) {
other = other.toColor();
}
for (var c = 0; c < 3; c++) {
result[c] = tree.operate(op, this.rgb[c], other.rgb[c]);
}
return new(tree.Color)(result, this.alpha + other.alpha);
},
toHSL: function () {
var r = this.rgb[0] / 255,
g = this.rgb[1] / 255,
b = this.rgb[2] / 255,
a = this.alpha;
var max = Math.max(r, g, b), min = Math.min(r, g, b);
var h, s, l = (max + min) / 2, d = max - min;
if (max === min) {
h = s = 0;
} else {
s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
switch (max) {
case r: h = (g - b) / d + (g < b ? 6 : 0); break;
case g: h = (b - r) / d + 2; break;
case b: h = (r - g) / d + 4; break;
}
h /= 6;
}
return { h: h * 360, s: s, l: l, a: a };
},
toARGB: function () {
var argb = [Math.round(this.alpha * 255)].concat(this.rgb);
return '#' + argb.map(function (i) {
i = Math.round(i);
i = (i > 255 ? 255 : (i < 0 ? 0 : i)).toString(16);
return i.length === 1 ? '0' + i : i;
}).join('');
},
compare: function (x) {
if (!x.rgb) {
return -1;
}
return (x.rgb[0] === this.rgb[0] &&
x.rgb[1] === this.rgb[1] &&
x.rgb[2] === this.rgb[2] &&
x.alpha === this.alpha) ? 0 : -1;
}
};
})(require('../tree'));
(function (tree) {
tree.Comment = function (value, silent) {
this.value = value;
this.silent = !!silent;
};
tree.Comment.prototype = {
toCSS: function (env) {
return env.compress ? '' : this.value;
},
eval: function () { return this }
};
})(require('../tree'));
(function (tree) {
tree.Condition = function (op, l, r, i, negate) {
this.op = op.trim();
this.lvalue = l;
this.rvalue = r;
this.index = i;
this.negate = negate;
};
tree.Condition.prototype.eval = function (env) {
var a = this.lvalue.eval(env),
b = this.rvalue.eval(env);
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);
},
compare: function (other) {
if (other instanceof tree.Dimension) {
if (other.value > this.value) {
return -1;
} else if (other.value < this.value) {
return 1;
} else {
if (other.unit && this.unit !== other.unit) {
return -1;
}
return 0;
}
} else {
return -1;
}
}
};
})(require('../tree'));
(function (tree) {
tree.Directive = function (name, value) {
this.name = name;
if (Array.isArray(value)) {
this.ruleset = new(tree.Ruleset)([], value);
this.ruleset.allowImports = true;
} else {
this.value = value;
}
};
tree.Directive.prototype = {
toCSS: function (ctx, env) {
if (this.ruleset) {
this.ruleset.root = true;
return this.name + (env.compress ? '{' : ' {\n ') +
this.ruleset.toCSS(ctx, env).trim().replace(/\n/g, '\n ') +
(env.compress ? '}': '\n}\n');
} else {
return this.name + ' ' + this.value.toCSS() + ';\n';
}
},
eval: function (env) {
var evaldDirective = this;
if (this.ruleset) {
env.frames.unshift(this);
evaldDirective = new(tree.Directive)(this.name);
evaldDirective.ruleset = this.ruleset.eval(env);
env.frames.shift();
}
return evaldDirective;
},
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) {
var value = (this.value.toCSS ? this.value.toCSS(env) : this.value);
if (value == '' && this.combinator.value.charAt(0) == '&') {
return '';
} else {
return this.combinator.toCSS(env || {}) + value;
}
};
tree.Combinator = function (value) {
if (value === ' ') {
this.value = ' ';
} else {
this.value = value ? value.trim() : "";
}
};
tree.Combinator.prototype.toCSS = function (env) {
return {
'' : '',
' ' : ' ',
':' : ' :',
'+' : env.compress ? '+' : ' + ',
'~' : 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, once, index, rootpath) {
var that = this;
this.once = once;
this.index = index;
this._path = path;
this.features = features && new(tree.Value)(features);
this.rootpath = rootpath;
// The '.less' extension is optional
if (path instanceof tree.Quoted) {
this.path = /(\.[a-z]*$)|([\?;].*)$/.test(path.value) ? path.value : path.value + '.less';
} else {
this.path = path.value.value || path.value;
}
this.css = /css([\?;].*)?$/.test(this.path);
// Only pre-compile .less files
if (! this.css) {
imports.push(this.path, function (e, root, imported) {
if (e) { e.index = index }
if (imported && that.once) that.skip = imported;
that.root = root || new(tree.Ruleset)([], []);
});
}
};
//
// The actual import node doesn't return anything, when converted to CSS.
// The reason is that it's used at the evaluation stage, so that the rules
// it imports can be treated like any other rules.
//
// In `eval`, we make sure all Import nodes get evaluated, recursively, so
// we end up with a flat structure, which can easily be imported in the parent
// ruleset.
//
tree.Import.prototype = {
toCSS: function (env) {
var features = this.features ? ' ' + this.features.toCSS(env) : '';
if (this.css) {
// Add the base path if the import is relative
if (typeof this._path.value === "string" && !/^(?:[a-z-]+:|\/)/.test(this._path.value)) {
this._path.value = this.rootpath + this._path.value;
}
return "@import " + this._path.toCSS() + features + ';\n';
} else {
return "";
}
},
eval: function (env) {
var ruleset, features = this.features && this.features.eval(env);
if (this.skip) return [];
if (this.css) {
return this;
} else {
ruleset = new(tree.Ruleset)([], this.root.rules.slice(0));
ruleset.evalImports(env);
return this.features ? new(tree.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.Media = function (value, features) {
var selectors = this.emptySelectors();
this.features = new(tree.Value)(features);
this.ruleset = new(tree.Ruleset)(selectors, value);
this.ruleset.allowImports = true;
};
tree.Media.prototype = {
toCSS: function (ctx, env) {
var features = this.features.toCSS(env);
this.ruleset.root = (ctx.length === 0 || ctx[0].multiMedia);
return '@media ' + features + (env.compress ? '{' : ' {\n ') +
this.ruleset.toCSS(ctx, env).trim().replace(/\n/g, '\n ') +
(env.compress ? '}': '\n}\n');
},
eval: function (env) {
if (!env.mediaBlocks) {
env.mediaBlocks = [];
env.mediaPath = [];
}
var media = new(tree.Media)([], []);
if(this.debugInfo) {
this.ruleset.debugInfo = this.debugInfo;
media.debugInfo = this.debugInfo;
}
media.features = this.features.eval(env);
env.mediaPath.push(media);
env.mediaBlocks.push(media);
env.frames.unshift(this.ruleset);
media.ruleset = this.ruleset.eval(env);
env.frames.shift();
env.mediaPath.pop();
return env.mediaPath.length === 0 ? media.evalTop(env) :
media.evalNested(env)
},
variable: function (name) { return tree.Ruleset.prototype.variable.call(this.ruleset, name) },
find: function () { return tree.Ruleset.prototype.find.apply(this.ruleset, arguments) },
rulesets: function () { return tree.Ruleset.prototype.rulesets.apply(this.ruleset) },
emptySelectors: function() {
var el = new(tree.Element)('', '&', 0);
return [new(tree.Selector)([el])];
},
evalTop: function (env) {
var result = this;
// Render all dependent Media blocks.
if (env.mediaBlocks.length > 1) {
var selectors = this.emptySelectors();
result = new(tree.Ruleset)(selectors, env.mediaBlocks);
result.multiMedia = true;
}
delete env.mediaBlocks;
delete env.mediaPath;
return result;
},
evalNested: function (env) {
var i, value,
path = env.mediaPath.concat([this]);
// Extract the media-query conditions separated with `,` (OR).
for (i = 0; i < path.length; i++) {
value = path[i].features instanceof tree.Value ?
path[i].features.value : path[i].features;
path[i] = Array.isArray(value) ? value : [value];
}
// Trace all permutations to generate the resulting media-query.
//
// (a, b and c) with nested (d, e) ->
// a and d
// a and e
// b and c and d
// b and c and e
this.features = new(tree.Value)(this.permute(path).map(function (path) {
path = path.map(function (fragment) {
return fragment.toCSS ? fragment : new(tree.Anonymous)(fragment);
});
for(i = path.length - 1; i > 0; i--) {
path.splice(i, 0, new(tree.Anonymous)("and"));
}
return new(tree.Expression)(path);
}));
// Fake a tree-node that doesn't output anything.
return new(tree.Ruleset)([], []);
},
permute: function (arr) {
if (arr.length === 0) {
return [];
} else if (arr.length === 1) {
return arr[0];
} else {
var result = [];
var rest = this.permute(arr.slice(1));
for (var i = 0; i < rest.length; i++) {
for (var j = 0; j < arr[0].length; j++) {
result.push([arr[0][j]].concat(rest[i]));
}
}
return result;
}
},
bubbleSelectors: function (selectors) {
this.ruleset = new(tree.Ruleset)(selectors.slice(0), [this.ruleset]);
}
};
})(require('../tree'));
(function (tree) {
tree.mixin = {};
tree.mixin.Call = function (elements, args, index, filename, important) {
this.selector = new(tree.Selector)(elements);
this.arguments = args;
this.index = index;
this.filename = filename;
this.important = important;
};
tree.mixin.Call.prototype = {
eval: function (env) {
var mixins, mixin, args, rules = [], match = false, i, m, f, isRecursive, isOneFound;
args = this.arguments && this.arguments.map(function (a) {
return { name: a.name, value: a.value.eval(env) };
});
for (i = 0; i < env.frames.length; i++) {
if ((mixins = env.frames[i].find(this.selector)).length > 0) {
isOneFound = true;
for (m = 0; m < mixins.length; m++) {
mixin = mixins[m];
isRecursive = false;
for(f = 0; f < env.frames.length; f++) {
if ((!(mixin instanceof tree.mixin.Definition)) && mixin === (env.frames[f].originalRuleset || env.frames[f])) {
isRecursive = true;
break;
}
}
if (isRecursive) {
continue;
}
if (mixin.matchArgs(args, env)) {
if (!mixin.matchCondition || mixin.matchCondition(args, env)) {
try {
Array.prototype.push.apply(
rules, mixin.eval(env, args, this.important).rules);
} catch (e) {
throw { message: e.message, index: this.index, filename: this.filename, stack: e.stack };
}
}
match = true;
}
}
if (match) {
return rules;
}
}
}
if (isOneFound) {
throw { type: 'Runtime',
message: 'No matching definition was found for `' +
this.selector.toCSS().trim() + '(' +
(args ? args.map(function (a) {
var argValue = "";
if (a.name) {
argValue += a.name + ":";
}
if (a.value.toCSS) {
argValue += a.value.toCSS();
} else {
argValue += "???";
}
return argValue;
}).join(', ') : "") + ")`",
index: this.index, filename: this.filename };
} else {
throw { type: 'Name',
message: this.selector.toCSS().trim() + " is undefined",
index: this.index, filename: this.filename };
}
}
};
tree.mixin.Definition = function (name, params, rules, condition, variadic) {
this.name = name;
this.selectors = [new(tree.Selector)([new(tree.Element)(null, name)])];
this.params = params;
this.condition = condition;
this.variadic = variadic;
this.arity = params.length;
this.rules = rules;
this._lookups = {};
this.required = params.reduce(function (count, p) {
if (!p.name || (p.name && !p.value)) { return count + 1 }
else { return count }
}, 0);
this.parent = tree.Ruleset.prototype;
this.frames = [];
};
tree.mixin.Definition.prototype = {
toCSS: function () { return "" },
variable: function (name) { return this.parent.variable.call(this, name) },
variables: function () { return this.parent.variables.call(this) },
find: function () { return this.parent.find.apply(this, arguments) },
rulesets: function () { return this.parent.rulesets.apply(this) },
evalParams: function (env, mixinEnv, args, evaldArguments) {
var frame = new(tree.Ruleset)(null, []), varargs, arg, params = this.params.slice(0), i, j, val, name, isNamedFound, argIndex;
if (args) {
args = args.slice(0);
for(i = 0; i < args.length; i++) {
arg = args[i];
if (name = (arg && arg.name)) {
isNamedFound = false;
for(j = 0; j < params.length; j++) {
if (!evaldArguments[j] && name === params[j].name) {
evaldArguments[j] = arg.value.eval(env);
frame.rules.unshift(new(tree.Rule)(name, arg.value.eval(env)));
isNamedFound = true;
break;
}
}
if (isNamedFound) {
args.splice(i, 1);
i--;
continue;
} else {
throw { type: 'Runtime', message: "Named argument for " + this.name +
' ' + args[i].name + ' not found' };
}
}
}
}
argIndex = 0;
for (i = 0; i < params.length; i++) {
if (evaldArguments[i]) continue;
arg = args && args[argIndex];
if (name = params[i].name) {
if (params[i].variadic && args) {
varargs = [];
for (j = argIndex; j < args.length; j++) {
varargs.push(args[j].value.eval(env));
}
frame.rules.unshift(new(tree.Rule)(name, new(tree.Expression)(varargs).eval(env)));
} else {
val = arg && arg.value;
if (val) {
val = val.eval(env);
} else if (params[i].value) {
val = params[i].value.eval(mixinEnv);
} else {
throw { type: 'Runtime', message: "wrong number of arguments for " + this.name +
' (' + args.length + ' for ' + this.arity + ')' };
}
frame.rules.unshift(new(tree.Rule)(name, val));
evaldArguments[i] = val;
}
}
if (params[i].variadic && args) {
for (j = argIndex; j < args.length; j++) {
evaldArguments[j] = args[j].value.eval(env);
}
}
argIndex++;
}
return frame;
},
eval: function (env, args, important) {
var _arguments = [],
mixinFrames = this.frames.concat(env.frames),
frame = this.evalParams(env, {frames: mixinFrames}, args, _arguments),
context, rules, start, ruleset;
frame.rules.unshift(new(tree.Rule)('@arguments', new(tree.Expression)(_arguments).eval(env)));
rules = important ?
this.parent.makeImportant.apply(this).rules : this.rules.slice(0);
ruleset = new(tree.Ruleset)(null, rules).eval({
frames: [this, frame].concat(mixinFrames)
});
ruleset.originalRuleset = this;
return ruleset;
},
matchCondition: function (args, env) {
if (this.condition && !this.condition.eval({
frames: [this.evalParams(env, {frames: this.frames.concat(env.frames)}, args, [])].concat(env.frames)
})) { return false }
return true;
},
matchArgs: function (args, env) {
var argsLength = (args && args.length) || 0, len, frame;
if (! this.variadic) {
if (argsLength < this.required) { return false }
if (argsLength > this.params.length) { return false }
if ((this.required > 0) && (argsLength > this.params.length)) { return false }
}
len = Math.min(argsLength, this.arity);
for (var i = 0; i < len; i++) {
if (!this.params[i].name && !this.params[i].variadic) {
if (args[i].value.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" };
}
}
if (!a.operate) {
throw { name: "OperationError",
message: "Operation on an invalid type" };
}
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 (v instanceof tree.Quoted) ? v.value : v.toCSS();
});
return new(tree.Quoted)(this.quote + value + this.quote, value, this.escaped, this.index);
},
compare: function (x) {
if (!x.toCSS) {
return -1;
}
var left = this.toCSS(),
right = x.toCSS();
if (left === right) {
return 0;
}
return left < right ? -1 : 1;
}
};
})(require('../tree'));
(function (tree) {
tree.Ratio = function (value) {
this.value = value;
};
tree.Ratio.prototype = {
toCSS: function (env) {
return this.value;
},
eval: function () { return this }
};
})(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.Rule.prototype.makeImportant = function () {
return new(tree.Rule)(this.name,
this.value,
"!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, strictImports) {
this.selectors = selectors;
this.rules = rules;
this._lookups = {};
this.strictImports = strictImports;
};
tree.Ruleset.prototype = {
eval: function (env) {
var selectors = this.selectors && this.selectors.map(function (s) { return s.eval(env) });
var ruleset = new(tree.Ruleset)(selectors, this.rules.slice(0), this.strictImports);
var rules;
ruleset.originalRuleset = this;
ruleset.root = this.root;
ruleset.allowImports = this.allowImports;
if(this.debugInfo) {
ruleset.debugInfo = this.debugInfo;
}
// push the current ruleset to the frames stack
env.frames.unshift(ruleset);
// Evaluate imports
if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) {
ruleset.evalImports(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);
}
}
var mediaBlockCount = (env.mediaBlocks && env.mediaBlocks.length) || 0;
// Evaluate mixin calls.
for (var i = 0; i < ruleset.rules.length; i++) {
if (ruleset.rules[i] instanceof tree.mixin.Call) {
rules = ruleset.rules[i].eval(env);
ruleset.rules.splice.apply(ruleset.rules, [i, 1].concat(rules));
i += rules.length-1;
ruleset.resetCache();
}
}
// 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();
if (env.mediaBlocks) {
for(var i = mediaBlockCount; i < env.mediaBlocks.length; i++) {
env.mediaBlocks[i].bubbleSelectors(selectors);
}
}
return ruleset;
},
evalImports: function(env) {
var i, rules;
for (i = 0; i < this.rules.length; i++) {
if (this.rules[i] instanceof tree.Import) {
rules = this.rules[i].eval(env);
if (typeof rules.length === "number") {
this.rules.splice.apply(this.rules, [i, 1].concat(rules));
i+= rules.length-1;
} else {
this.rules.splice(i, 1, rules);
}
this.resetCache();
}
}
},
makeImportant: function() {
return new tree.Ruleset(this.selectors, this.rules.map(function (r) {
if (r.makeImportant) {
return r.makeImportant();
} else {
return r;
}
}), this.strictImports);
},
matchArgs: function (args) {
return !args || args.length === 0;
},
resetCache: function () {
this._rulesets = null;
this._variables = null;
this._lookups = {};
},
variables: function () {
if (this._variables) { return this._variables }
else {
return this._variables = this.rules.reduce(function (hash, r) {
if (r instanceof tree.Rule && r.variable === true) {
hash[r.name] = r;
}
return hash;
}, {});
}
},
variable: function (name) {
return this.variables()[name];
},
rulesets: function () {
if (this._rulesets) { return this._rulesets }
else {
return this._rulesets = this.rules.filter(function (r) {
return (r instanceof tree.Ruleset) || (r instanceof tree.mixin.Definition);
});
}
},
find: function (selector, self) {
self = self || this;
var rules = [], rule, match,
key = selector.toCSS();
if (key in this._lookups) { return this._lookups[key] }
this.rulesets().forEach(function (rule) {
if (rule !== self) {
for (var j = 0; j < rule.selectors.length; j++) {
if (match = selector.match(rule.selectors[j])) {
if (selector.elements.length > rule.selectors[j].elements.length) {
Array.prototype.push.apply(rules, rule.find(
new(tree.Selector)(selector.elements.slice(1)), self));
} else {
rules.push(rule);
}
break;
}
}
}
});
return this._lookups[key] = rules;
},
//
// Entry point for code generation
//
// `context` holds an array of arrays.
//
toCSS: function (context, env) {
var css = [], // The CSS output
rules = [], // node.Rule instances
_rules = [], //
rulesets = [], // node.Ruleset instances
paths = [], // Current selectors
selector, // The fully rendered selector
debugInfo, // Line number debugging
rule;
if (! this.root) {
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.Media)) {
rulesets.push(rule.toCSS(paths, env));
} else if (rule instanceof tree.Directive) {
var cssValue = rule.toCSS(paths, env);
// Output only the first @charset definition as such - convert the others
// to comments in case debug is enabled
if (rule.name === "@charset") {
// Only output the debug info together with subsequent @charset definitions
// a comment (or @media statement) before the actual @charset directive would
// be considered illegal css as it has to be on the first line
if (env.charset) {
if (rule.debugInfo) {
rulesets.push(tree.debugInfo(env, rule));
rulesets.push(new tree.Comment("/* "+cssValue.replace(/\n/g, "")+" */\n").toCSS(env));
}
continue;
}
env.charset = true;
}
rulesets.push(cssValue);
} 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) {
debugInfo = tree.debugInfo(env, this);
selector = paths.map(function (p) {
return p.map(function (s) {
return s.toCSS(env);
}).join('').trim();
}).join(env.compress ? ',' : ',\n');
// Remove duplicates
for (var i = rules.length - 1; i >= 0; i--) {
if (_rules.indexOf(rules[i]) === -1) {
_rules.unshift(rules[i]);
}
}
rules = _rules;
css.push(debugInfo + 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 i, j, k,
hasParentSelector, newSelectors, el, sel, parentSel,
newSelectorPath, afterParentJoin, newJoinedSelector,
newJoinedSelectorEmpty, lastSelector, currentElements,
selectorsMultiplied;
for (i = 0; i < selector.elements.length; i++) {
el = selector.elements[i];
if (el.value === '&') {
hasParentSelector = true;
}
}
if (!hasParentSelector) {
if (context.length > 0) {
for(i = 0; i < context.length; i++) {
paths.push(context[i].concat(selector));
}
}
else {
paths.push([selector]);
}
return;
}
// The paths are [[Selector]]
// The first list is a list of comma seperated selectors
// The inner list is a list of inheritance seperated selectors
// e.g.
// .a, .b {
// .c {
// }
// }
// == [[.a] [.c]] [[.b] [.c]]
//
// the elements from the current selector so far
currentElements = [];
// the current list of new selectors to add to the path.
// We will build it up. We initiate it with one empty selector as we "multiply" the new selectors
// by the parents
newSelectors = [[]];
for (i = 0; i < selector.elements.length; i++) {
el = selector.elements[i];
// non parent reference elements just get added
if (el.value !== "&") {
currentElements.push(el);
} else {
// the new list of selectors to add
selectorsMultiplied = [];
// merge the current list of non parent selector elements
// on to the current list of selectors to add
if (currentElements.length > 0) {
this.mergeElementsOnToSelectors(currentElements, newSelectors);
}
// loop through our current selectors
for(j = 0; j < newSelectors.length; j++) {
sel = newSelectors[j];
// if we don't have any parent paths, the & might be in a mixin so that it can be used
// whether there are parents or not
if (context.length == 0) {
// the combinator used on el should now be applied to the next element instead so that
// it is not lost
if (sel.length > 0) {
sel[0].elements = sel[0].elements.slice(0);
sel[0].elements.push(new(tree.Element)(el.combinator, '', 0)); //new Element(el.Combinator, ""));
}
selectorsMultiplied.push(sel);
}
else {
// and the parent selectors
for(k = 0; k < context.length; k++) {
parentSel = context[k];
// We need to put the current selectors
// then join the last selector's elements on to the parents selectors
// our new selector path
newSelectorPath = [];
// selectors from the parent after the join
afterParentJoin = [];
newJoinedSelectorEmpty = true;
//construct the joined selector - if & is the first thing this will be empty,
// if not newJoinedSelector will be the last set of elements in the selector
if (sel.length > 0) {
newSelectorPath = sel.slice(0);
lastSelector = newSelectorPath.pop();
newJoinedSelector = new(tree.Selector)(lastSelector.elements.slice(0));
newJoinedSelectorEmpty = false;
}
else {
newJoinedSelector = new(tree.Selector)([]);
}
//put together the parent selectors after the join
if (parentSel.length > 1) {
afterParentJoin = afterParentJoin.concat(parentSel.slice(1));
}
if (parentSel.length > 0) {
newJoinedSelectorEmpty = false;
// join the elements so far with the first part of the parent
newJoinedSelector.elements.push(new(tree.Element)(el.combinator, parentSel[0].elements[0].value, 0));
newJoinedSelector.elements = newJoinedSelector.elements.concat(parentSel[0].elements.slice(1));
}
if (!newJoinedSelectorEmpty) {
// now add the joined selector
newSelectorPath.push(newJoinedSelector);
}
// and the rest of the parent
newSelectorPath = newSelectorPath.concat(afterParentJoin);
// add that to our new set of selectors
selectorsMultiplied.push(newSelectorPath);
}
}
}
// our new selectors has been multiplied, so reset the state
newSelectors = selectorsMultiplied;
currentElements = [];
}
}
// if we have any elements left over (e.g. .a& .b == .b)
// add them on to all the current selectors
if (currentElements.length > 0) {
this.mergeElementsOnToSelectors(currentElements, newSelectors);
}
for(i = 0; i < newSelectors.length; i++) {
paths.push(newSelectors[i]);
}
},
mergeElementsOnToSelectors: function(elements, selectors) {
var i, sel;
if (selectors.length == 0) {
selectors.push([ new(tree.Selector)(elements) ]);
return;
}
for(i = 0; i < selectors.length; i++) {
sel = selectors[i];
// if the previous thing in sel is a parent this needs to join on to it
if (sel.length > 0) {
sel[sel.length - 1] = new(tree.Selector)(sel[sel.length - 1].elements.concat(elements));
}
else {
sel.push(new(tree.Selector)(elements));
}
}
}
};
})(require('../tree'));
(function (tree) {
tree.Selector = function (elements) {
this.elements = elements;
};
tree.Selector.prototype.match = function (other) {
var elements = this.elements,
len = elements.length,
oelements, olen, max, i;
oelements = other.elements.slice(
(other.elements.length && other.elements[0].value === "&") ? 1 : 0);
olen = oelements.length;
max = Math.min(len, olen)
if (olen === 0 || len < olen) {
return false;
} else {
for (i = 0; i < max; i++) {
if (elements[i].value !== oelements[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 }
if (this.elements[0].combinator.value === "") {
this._css = ' ';
} else {
this._css = '';
}
this._css += this.elements.map(function (e) {
if (typeof(e) === 'string') {
return ' ' + e.trim();
} else {
return e.toCSS(env);
}
}).join('');
return this._css;
};
})(require('../tree'));
(function (tree) {
tree.UnicodeDescriptor = function (value) {
this.value = value;
};
tree.UnicodeDescriptor.prototype = {
toCSS: function (env) {
return this.value;
},
eval: function () { return this }
};
})(require('../tree'));
(function (tree) {
tree.URL = function (val, rootpath) {
this.value = val;
this.rootpath = rootpath;
};
tree.URL.prototype = {
toCSS: function () {
return "url(" + this.value.toCSS() + ")";
},
eval: function (ctx) {
var val = this.value.eval(ctx), rootpath;
// Add the base path if the URL is relative
if (typeof val.value === "string" && !/^(?:[a-z-]+:|\/)/.test(val.value)) {
rootpath = this.rootpath;
if (!val.quote) {
rootpath = rootpath.replace(/[\(\)'"\s]/g, function(match) { return "\\"+match; });
}
val.value = rootpath + val.value;
}
return new(tree.URL)(val, this.rootpath);
}
};
})(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, file) { this.name = name, this.index = index, this.file = file };
tree.Variable.prototype = {
eval: function (env) {
var variable, v, name = this.name;
if (name.indexOf('@@') == 0) {
name = '@' + new(tree.Variable)(name.slice(1)).eval(env).value;
}
if (this.evaluating) {
throw { type: 'Name',
message: "Recursive variable definition for " + name,
filename: this.file,
index: this.index };
}
this.evaluating = true;
if (variable = tree.find(env.frames, function (frame) {
if (v = frame.variable(name)) {
return v.value.eval(env);
}
})) {
this.evaluating = false;
return variable;
}
else {
throw { type: 'Name',
message: "variable " + name + " is undefined",
filename: this.file,
index: this.index };
}
}
};
})(require('../tree'));
(function (tree) {
tree.debugInfo = function(env, ctx) {
var result="";
if (env.dumpLineNumbers && !env.compress) {
switch(env.dumpLineNumbers) {
case 'comments':
result = tree.debugInfo.asComment(ctx);
break;
case 'mediaquery':
result = tree.debugInfo.asMediaQuery(ctx);
break;
case 'all':
result = tree.debugInfo.asComment(ctx)+tree.debugInfo.asMediaQuery(ctx);
break;
}
}
return result;
};
tree.debugInfo.asComment = function(ctx) {
return '/* line ' + ctx.debugInfo.lineNumber + ', ' + ctx.debugInfo.fileName + ' */\n';
};
tree.debugInfo.asMediaQuery = function(ctx) {
return '@media -sass-debug-info{filename{font-family:' +
('file://' + ctx.debugInfo.fileName).replace(/[\/:.]/g, '\\$&') +
'}line{font-family:\\00003' + ctx.debugInfo.lineNumber + '}}\n';
};
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 = /^(file|chrome(-extension)?|resource|qrc|app):/.test(location.protocol);
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 = less.async || false;
less.fileAsync = less.fileAsync || false;
// Interval between watch polls
less.poll = less.poll || (isFileProtocol ? 1000 : 1500);
//Setup user functions
if (less.functions) {
for(var func in less.functions) {
less.tree.functions[func] = less.functions[func];
}
}
var dumpLineNumbers = /!dumpLineNumbers:(comments|mediaquery|all)/.exec(location.hash);
if (dumpLineNumbers) {
less.dumpLineNumbers = dumpLineNumbers[1];
}
//
// Watch mode
//
less.watch = function () {
if (!less.watchMode ){
less.env = 'development';
initRunningMode();
}
return this.watchMode = true
};
less.unwatch = function () {clearInterval(less.watchTimer); return this.watchMode = false; };
function initRunningMode(){
if (less.env === 'development') {
less.optimization = 0;
less.watchTimer = setInterval(function () {
if (less.watchMode) {
loadStyleSheets(function (e, root, _, sheet, env) {
if (root) {
createCSS(root.toCSS(), sheet, env.lastModified);
}
});
}
}, less.poll);
} else {
less.optimization = 3;
}
}
if (/!watch/.test(location.hash)) {
less.watch();
}
var cache = null;
if (less.env != 'development') {
try {
cache = (typeof(window.localStorage) === 'undefined') ? null : window.localStorage;
} catch (_) {}
}
//
// Get all tags with the 'rel' attribute set to "stylesheet/less"
//
var links = document.getElementsByTagName('link');
var typePattern = /^text\/(x-)?less$/;
less.sheets = [];
for (var i = 0; i < links.length; i++) {
if (links[i].rel === 'stylesheet/less' || (links[i].rel.match(/stylesheet/) &&
(links[i].type.match(typePattern)))) {
less.sheets.push(links[i]);
}
}
//
// With this function, it's possible to alter variables and re-render
// CSS without reloading less-files
//
var session_cache = '';
less.modifyVars = function(record) {
var str = session_cache;
for (name in record) {
str += ((name.slice(0,1) === '@')? '' : '@') + name +': '+
((record[name].slice(-1) === ';')? record[name] : record[name] +';');
}
new(less.Parser)().parse(str, function (e, root) {
createCSS(root.toCSS(), less.sheets[less.sheets.length - 1]);
});
};
less.refresh = function (reload) {
var startTime, endTime;
startTime = endTime = new(Date);
loadStyleSheets(function (e, root, _, sheet, env) {
if (env.local) {
log("loading " + sheet.href + " from cache.");
} else {
log("parsed " + sheet.href + " successfully.");
createCSS(root.toCSS(), sheet, env.lastModified);
}
log("css for " + sheet.href + " generated in " + (new(Date) - endTime) + 'ms');
(env.remaining === 0) && log("css generated in " + (new(Date) - startTime) + 'ms');
endTime = new(Date);
}, reload);
loadStyles();
};
less.refreshStyles = loadStyles;
less.refresh(less.env === 'development');
function loadStyles() {
var styles = document.getElementsByTagName('style');
for (var i = 0; i < styles.length; i++) {
if (styles[i].type.match(typePattern)) {
new(less.Parser)({
filename: document.location.href.replace(/#.*$/, ''),
dumpLineNumbers: less.dumpLineNumbers
}).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 pathDiff(url, baseUrl) {
// diff between two paths to create a relative path
var urlParts = extractUrlParts(url),
baseUrlParts = extractUrlParts(baseUrl),
i, max, urlDirectories, baseUrlDirectories, diff = "";
if (urlParts.hostPart !== baseUrlParts.hostPart) {
return "";
}
max = Math.max(baseUrlParts.directories.length, urlParts.directories.length);
for(i = 0; i < max; i++) {
if (baseUrlParts.directories[i] !== urlParts.directories[i]) { break; }
}
baseUrlDirectories = baseUrlParts.directories.slice(i);
urlDirectories = urlParts.directories.slice(i);
for(i = 0; i < baseUrlDirectories.length-1; i++) {
diff += "../";
}
for(i = 0; i < urlDirectories.length-1; i++) {
diff += urlDirectories[i] + "/";
}
return diff;
}
function extractUrlParts(url, baseUrl) {
// urlParts[1] = protocol&hostname || /
// urlParts[2] = / if path relative to host base
// urlParts[3] = directories
// urlParts[4] = filename
// urlParts[5] = parameters
var urlPartsRegex = /^((?:[a-z-]+:)?\/\/(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/,
urlParts = url.match(urlPartsRegex),
returner = {}, directories = [], i, baseUrlParts;
if (!urlParts) {
throw new Error("Could not parse sheet href - '"+url+"'");
}
// Stylesheets in IE don't always return the full path
if (!urlParts[1] || urlParts[2]) {
baseUrlParts = baseUrl.match(urlPartsRegex);
if (!baseUrlParts) {
throw new Error("Could not parse page url - '"+baseUrl+"'");
}
urlParts[1] = baseUrlParts[1];
if (!urlParts[2]) {
urlParts[3] = baseUrlParts[3] + urlParts[3];
}
}
if (urlParts[3]) {
directories = urlParts[3].replace("\\", "/").split("/");
for(i = 0; i < directories.length; i++) {
if (directories[i] === ".." && i > 0) {
directories.splice(i-1, 2);
i -= 2;
}
}
}
returner.hostPart = urlParts[1];
returner.directories = directories;
returner.path = urlParts[1] + directories.join("/");
returner.fileUrl = returner.path + (urlParts[4] || "");
returner.url = returner.fileUrl + (urlParts[5] || "");
return returner;
}
function loadStyleSheet(sheet, callback, reload, remaining) {
// sheet may be set to the stylesheet for the initial load or a collection of properties including
// some env variables for imports
var contents = sheet.contents || {};
var files = sheet.files || {};
var hrefParts = extractUrlParts(sheet.href, window.location.href);
var href = hrefParts.url;
var css = cache && cache.getItem(href);
var timestamp = cache && cache.getItem(href + ':timestamp');
var styles = { css: css, timestamp: timestamp };
var rootpath;
if (less.relativeUrls) {
if (less.rootpath) {
if (sheet.entryPath) {
rootpath = extractUrlParts(less.rootpath + pathDiff(hrefParts.path, sheet.entryPath)).path;
} else {
rootpath = less.rootpath;
}
} else {
rootpath = hrefParts.path;
}
} else {
if (less.rootpath) {
rootpath = less.rootpath;
} else {
if (sheet.entryPath) {
rootpath = sheet.entryPath;
} else {
rootpath = hrefParts.path;
}
}
}
xhr(href, sheet.type, function (data, lastModified) {
// Store data this session
session_cache += data.replace(/@import .+?;/ig, '');
if (!reload && styles && lastModified &&
(new(Date)(lastModified).valueOf() ===
new(Date)(styles.timestamp).valueOf())) {
// Use local copy
createCSS(styles.css, sheet);
callback(null, null, data, sheet, { local: true, remaining: remaining }, href);
} else {
// Use remote copy (re-parse)
try {
contents[href] = data; // Updating top importing parser content cache
new(less.Parser)({
optimization: less.optimization,
paths: [hrefParts.path],
entryPath: sheet.entryPath || hrefParts.path,
mime: sheet.type,
filename: href,
rootpath: rootpath,
relativeUrls: sheet.relativeUrls,
contents: contents, // Passing top importing parser content cache ref down.
files: files,
dumpLineNumbers: less.dumpLineNumbers
}).parse(data, function (e, root) {
if (e) { return error(e, href) }
try {
callback(e, root, data, sheet, { local: false, lastModified: lastModified, remaining: remaining }, href);
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(/\.[a-zA-Z]+$/, '' ) // Remove simple 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 || '';
// 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';
if( sheet.media ){ css.media = sheet.media; }
css.id = id;
var nextEl = sheet && sheet.nextSibling || null;
(nextEl || document.getElementsByTagName('head')[0]).parentNode.insertBefore(css, nextEl);
}
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.');
try {
cache.setItem(href, styles);
cache.setItem(href + ':timestamp', lastModified);
} catch(e) {
//TODO - could do with adding more robust error handling
log('failed to save');
}
}
}
function xhr(url, type, callback, errback) {
var xhr = getXMLHttpRequest();
var async = isFileProtocol ? less.fileAsync : 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 && !less.fileAsync) {
if (xhr.status === 0 || (xhr.status >= 200 && xhr.status < 300)) {
callback(xhr.responseText);
} else {
errback(xhr.status, url);
}
} else if (async) {
xhr.onreadystatechange = function () {
if (xhr.readyState == 4) {
handleResponse(xhr, callback, errback);
}
};
} else {
handleResponse(xhr, callback, errback);
}
function handleResponse(xhr, callback, errback) {
if (xhr.status >= 200 && xhr.status < 300) {
callback(xhr.responseText,
xhr.getResponseHeader("Last-Modified"));
} else if (typeof(errback) === 'function') {
errback(xhr.status, url);
}
}
}
function getXMLHttpRequest() {
if (window.XMLHttpRequest) {
return new(XMLHttpRequest);
} else {
try {
return new(ActiveXObject)("MSXML2.XMLHTTP.3.0");
} catch (e) {
log("browser doesn't support AJAX.");
return null;
}
}
}
function removeNode(node) {
return node && node.parentNode.removeChild(node);
}
function log(str) {
if (less.env == 'development' && typeof(console) !== "undefined") { console.log('less: ' + str) }
}
function error(e, href) {
var id = 'less-error-message:' + extractId(href);
var template = '{content}';
var elem = document.createElement('div'), timer, content, error = [];
var filename = e.filename || href;
var filenameNoPath = filename.match(/([^\/]+(\?.*)?)$/)[1];
elem.id = id;
elem.className = "less-error-message";
content = '' + (e.message || 'There is an error in your .less file') +
'
' + 'in ' + filenameNoPath + " ";
var errorline = function (e, i, classname) {
if (e.extract[i]) {
error.push(template.replace(/\{line\}/, parseInt(e.line) + (i - 1))
.replace(/\{class\}/, classname)
.replace(/\{content\}/, e.extract[i]));
}
};
if (e.stack) {
content += '
' + e.stack.split('\n').slice(1).join('
');
} else if (e.extract) {
errorline(e, 0, '');
errorline(e, 1, 'line');
errorline(e, 2, '');
content += 'on line ' + e.line + ', column ' + (e.column + 1) + ':
' +
'';
}
elem.innerHTML = content;
// CSS for error messages
createCSS([
'.less-error-message ul, .less-error-message li {',
'list-style-type: none;',
'margin-right: 15px;',
'padding: 4px 0;',
'margin: 0;',
'}',
'.less-error-message label {',
'font-size: 12px;',
'margin-right: 15px;',
'padding: 4px 0;',
'color: #cc7777;',
'}',
'.less-error-message pre {',
'color: #dd6666;',
'padding: 4px 0;',
'margin: 0;',
'display: inline-block;',
'}',
'.less-error-message pre.line {',
'color: #ff0000;',
'}',
'.less-error-message h3 {',
'font-size: 20px;',
'font-weight: bold;',
'padding: 15px 0 5px 0;',
'margin: 0;',
'}',
'.less-error-message a {',
'color: #10a',
'}',
'.less-error-message .error {',
'color: red;',
'font-weight: bold;',
'padding-bottom: 2px;',
'border-bottom: 1px dashed red;',
'}'
].join('\n'), { title: 'error-message' });
elem.style.cssText = [
"font-family: Arial, sans-serif",
"border: 1px solid #e00",
"background-color: #eee",
"border-radius: 5px",
"-webkit-border-radius: 5px",
"-moz-border-radius: 5px",
"color: #e00",
"padding: 15px",
"margin-bottom: 15px"
].join(';');
if (less.env == 'development') {
timer = setInterval(function () {
if (document.body) {
if (document.getElementById(id)) {
document.body.replaceChild(elem, document.getElementById(id));
} else {
document.body.insertBefore(elem, document.body.firstChild);
}
clearInterval(timer);
}
}, 10);
}
}
// amd.js
//
// Define Less as an AMD module.
if (typeof define === "function" && define.amd) {
define("less", [], function () { return less; } );
}
})(window);