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Example of LESSCSS ticket #1599 https://github.com/less/less.js/issues/1599
Raw
less-1.5.0.js
/*!
* LESS - Leaner CSS v1.5.0
* http://lesscss.org
*
* Copyright (c) 2009-2013, Alexis Sellier <self@cloudhead.net>
* Licensed under the Apache v2 License.
*
* @licence
*/
(function (window, undefined) {//
// Stub out `require` in the browser
//
function require(arg) {
return window.less[arg.split('/')[1]];
};
if (typeof(window.less) === 'undefined' || typeof(window.less.nodeType) !== 'undefined') { window.less = {}; }
less = window.less;
tree = window.less.tree = {};
less.mode = 'browser';
var less, tree;
// Node.js does not have a header file added which defines less
if (less === undefined) {
less = exports;
tree = require('./tree');
less.mode = 'node';
}
//
// 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,
rootFilename = env && env.filename;
// Top parser on an import tree must be sure there is one "env"
// which will then be passed around by reference.
if (!(env instanceof tree.parseEnv)) {
env = new tree.parseEnv(env);
}
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, currentFileInfo, importOptions, callback) {
var parserImports = this;
this.queue.push(path);
var fileParsedFunc = function (e, root, fullPath) {
parserImports.queue.splice(parserImports.queue.indexOf(path), 1); // Remove the path from the queue
var importedPreviously = fullPath in parserImports.files || fullPath === rootFilename;
parserImports.files[fullPath] = root; // Store the root
if (e && !parserImports.error) { parserImports.error = e; }
callback(e, root, importedPreviously, fullPath);
};
if (less.Parser.importer) {
less.Parser.importer(path, currentFileInfo, fileParsedFunc, env);
} else {
less.Parser.fileLoader(path, currentFileInfo, function(e, contents, fullPath, newFileInfo) {
if (e) {fileParsedFunc(e); return;}
var newEnv = new tree.parseEnv(env);
newEnv.currentFileInfo = newFileInfo;
newEnv.processImports = false;
newEnv.contents[fullPath] = contents;
if (currentFileInfo.reference || importOptions.reference) {
newFileInfo.reference = true;
}
if (importOptions.inline) {
fileParsedFunc(null, contents, fullPath);
} else {
new(less.Parser)(newEnv).parse(contents, function (e, root) {
fileParsedFunc(e, root, fullPath);
});
}
}, 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, length;
//
// 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 {
return tok.test(chunks[j]);
}
}
function getInput(e, env) {
if (e.filename && env.currentFileInfo.filename && (e.filename !== env.currentFileInfo.filename)) {
return parser.imports.contents[e.filename];
} else {
return input;
}
}
function getLocation(index, inputStream) {
var n = index + 1,
line = null,
column = -1;
while (--n >= 0 && inputStream.charAt(n) !== '\n') {
column++;
}
if (typeof index === 'number') {
line = (inputStream.slice(0, index).match(/\n/g) || "").length;
}
return {
line: line,
column: column
};
}
function getDebugInfo(index, inputStream, env) {
var filename = env.currentFileInfo.filename;
if(less.mode !== 'browser' && less.mode !== 'rhino') {
filename = require('path').resolve(filename);
}
return {
lineNumber: getLocation(index, inputStream).line + 1,
fileName: filename
};
}
function LessError(e, env) {
var input = getInput(e, env),
loc = getLocation(e.index, input),
line = loc.line,
col = loc.column,
callLine = e.call && getLocation(e.call, input).line,
lines = input.split('\n');
this.type = e.type || 'Syntax';
this.message = e.message;
this.filename = e.filename || env.currentFileInfo.filename;
this.index = e.index;
this.line = typeof(line) === 'number' ? line + 1 : null;
this.callLine = callLine + 1;
this.callExtract = lines[callLine];
this.stack = e.stack;
this.column = col;
this.extract = [
lines[line - 1],
lines[line],
lines[line + 1]
];
}
LessError.prototype = new Error();
LessError.prototype.constructor = LessError;
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;
//
// 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, line, lines, error = null;
i = j = current = furthest = 0;
input = str.replace(/\r\n/g, '\n');
// Remove potential UTF Byte Order Mark
input = input.replace(/^\uFEFF/, '');
parser.imports.contents[env.currentFileInfo.filename] = input;
// 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;
}
/* falls through */
case '}':
if (!inParam) {
level--;
chunk.push(c);
chunks[++j] = chunk = [];
break;
}
/* falls through */
case '(':
if (!inParam) {
inParam = true;
chunk.push(c);
break;
}
/* falls through */
case ')':
if (inParam) {
inParam = false;
chunk.push(c);
break;
}
/* falls through */
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.currentFileInfo.filename
}, env);
}
return chunks.map(function (c) { return c.join(''); });
})([[]]);
if (error) {
return callback(new(LessError)(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)([], $(this.parsers.primary));
root.root = true;
root.firstRoot = true;
} catch (e) {
return callback(new(LessError)(e, env));
}
root.toCSS = (function (evaluate) {
return function (options, variables) {
options = options || {};
var evaldRoot,
css,
evalEnv = new tree.evalEnv(options);
//
// Allows setting variables with a hash, so:
//
// `{ color: new(tree.Color)('#f01') }` will become:
//
// new(tree.Rule)('@color',
// new(tree.Value)([
// new(tree.Expression)([
// new(tree.Color)('#f01')
// ])
// ])
// )
//
if (typeof(variables) === 'object' && !Array.isArray(variables)) {
variables = Object.keys(variables).map(function (k) {
var value = variables[k];
if (! (value instanceof tree.Value)) {
if (! (value instanceof tree.Expression)) {
value = new(tree.Expression)([value]);
}
value = new(tree.Value)([value]);
}
return new(tree.Rule)('@' + k, value, false, null, 0);
});
evalEnv.frames = [new(tree.Ruleset)(null, variables)];
}
try {
evaldRoot = evaluate.call(this, evalEnv);
new(tree.joinSelectorVisitor)()
.run(evaldRoot);
new(tree.processExtendsVisitor)()
.run(evaldRoot);
new(tree.toCSSVisitor)({compress: Boolean(options.compress)})
.run(evaldRoot);
if (options.sourceMap) {
evaldRoot = new tree.sourceMapOutput(
{
writeSourceMap: options.writeSourceMap,
rootNode: evaldRoot,
contentsMap: parser.imports.contents,
sourceMapFilename: options.sourceMapFilename,
outputFilename: options.sourceMapOutputFilename,
sourceMapBasepath: options.sourceMapBasepath,
sourceMapRootpath: options.sourceMapRootpath,
outputSourceFiles: options.outputSourceFiles,
sourceMapGenerator: options.sourceMapGenerator
});
}
css = evaldRoot.toCSS({
compress: Boolean(options.compress),
dumpLineNumbers: env.dumpLineNumbers,
strictUnits: Boolean(options.strictUnits)});
} catch (e) {
throw new(LessError)(e, env);
}
if (options.cleancss && less.mode === 'node') {
return require('clean-css').process(css);
} else if (options.compress) {
return css.replace(/(^(\s)+)|((\s)+$)/g, "");
} 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;
var loc = getLocation(i, input);
lines = input.split('\n');
line = loc.line + 1;
error = {
type: "Parse",
message: "Unrecognised input",
index: i,
filename: env.currentFileInfo.filename,
line: line,
column: loc.column,
extract: [
lines[line - 2],
lines[line - 1],
lines[line]
]
};
}
var finish = function (e) {
e = error || e || parser.imports.error;
if (e) {
if (!(e instanceof LessError)) {
e = new(LessError)(e, env);
}
return callback(e);
}
else {
return callback(null, root);
}
};
if (env.processImports !== false) {
new tree.importVisitor(this.imports, finish)
.run(root);
} else {
return finish();
}
},
//
// 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.extendRule) || $(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, i, env.currentFileInfo);
} else if (comment = $(/^\/\*(?:[^*]|\*+[^\/*])*\*+\/\n?/)) {
return new(tree.Comment)(comment, false, i, env.currentFileInfo);
}
},
comments: function () {
var comment, comments = [];
while(comment = $(this.comment)) {
comments.push(comment);
}
return comments;
},
//
// 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, index = i;
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, index, env.currentFileInfo);
}
},
//
// A catch-all word, such as:
//
// black border-collapse
//
keyword: function () {
var k;
if (k = $(/^[_A-Za-z-][_A-Za-z0-9-]*/)) {
var color = tree.Color.fromKeyword(k);
if (color) {
return color;
}
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.currentFileInfo); }
},
arguments: function () {
var args = [], arg;
while (arg = $(this.entities.assignment) || $(this.expression)) {
args.push(arg);
if (! $(',')) {
break;
}
}
return args;
},
literal: function () {
return $(this.entities.dimension) ||
$(this.entities.color) ||
$(this.entities.quoted) ||
$(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(')');
/*jshint eqnull:true */
return new(tree.URL)((value.value != null || value instanceof tree.Variable)
? value : new(tree.Anonymous)(value), env.currentFileInfo);
},
//
// 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.currentFileInfo);
}
},
// A variable entity useing the protective {} e.g. @{var}
variableCurly: function () {
var curly, index = i;
if (input.charAt(i) === '@' && (curly = $(/^@\{([\w-]+)\}/))) {
return new(tree.Variable)("@" + curly[1], index, env.currentFileInfo);
}
},
//
// 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+)(%|[a-z]+)?/)) {
return new(tree.Dimension)(value[1], value[2]);
}
},
//
// 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; }
if (env.javascriptEnabled !== undefined && !env.javascriptEnabled) {
error("You are using JavaScript, which has been disabled.");
}
if (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 = $(/^(@[\w-]+)\s*:/))) { return name[1]; }
},
//
// extend syntax - used to extend selectors
//
extend: function(isRule) {
var elements, e, index = i, option, extendList = [];
if (!$(isRule ? /^&:extend\(/ : /^:extend\(/)) { return; }
do {
option = null;
elements = [];
while (true) {
option = $(/^(all)(?=\s*(\)|,))/);
if (option) { break; }
e = $(this.element);
if (!e) { break; }
elements.push(e);
}
option = option && option[1];
extendList.push(new(tree.Extend)(new(tree.Selector)(elements), option, index));
} while($(","));
expect(/^\)/);
if (isRule) {
expect(/^;/);
}
return extendList;
},
//
// extendRule - used in a rule to extend all the parent selectors
//
extendRule: function() {
return this.extend(true);
},
//
// Mixins
//
mixin: {
//
// A Mixin call, with an optional argument list
//
// #mixins > .square(#fff);
// .rounded(4px, black);
// .button;
//
// The `while` loop is there because mixins can be
// namespaced, but we only support the child and descendant
// selector for now.
//
call: function () {
var elements = [], e, c, args, index = i, s = input.charAt(i), important = false;
if (s !== '.' && s !== '#') { return; }
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, env.currentFileInfo));
c = $('>');
}
if ($('(')) {
args = this.mixin.args.call(this, true).args;
expect(')');
}
args = args || [];
if ($(this.important)) {
important = true;
}
if (elements.length > 0 && ($(';') || peek('}'))) {
return new(tree.mixin.Call)(elements, args, index, env.currentFileInfo, important);
}
restore();
},
args: function (isCall) {
var expressions = [], argsSemiColon = [], isSemiColonSeperated, argsComma = [], expressionContainsNamed, name, nameLoop, value, arg,
returner = {args:null, variadic: false};
while (true) {
if (isCall) {
arg = $(this.expression);
} else {
$(this.comments);
if (input.charAt(i) === '.' && $(/^\.{3}/)) {
returner.variadic = true;
if ($(";") && !isSemiColonSeperated) {
isSemiColonSeperated = true;
}
(isSemiColonSeperated ? argsSemiColon : argsComma)
.push({ variadic: true });
break;
}
arg = $(this.entities.variable) || $(this.entities.literal)
|| $(this.entities.keyword);
}
if (!arg) {
break;
}
nameLoop = null;
if (arg.throwAwayComments) {
arg.throwAwayComments();
}
value = arg;
var val = null;
if (isCall) {
// Variable
if (arg.value.length == 1) {
val = arg.value[0];
}
} else {
val = arg;
}
if (val && val instanceof tree.Variable) {
if ($(':')) {
if (expressions.length > 0) {
if (isSemiColonSeperated) {
error("Cannot mix ; and , as delimiter types");
}
expressionContainsNamed = true;
}
value = expect(this.expression);
nameLoop = (name = val.name);
} else if (!isCall && $(/^\.{3}/)) {
returner.variadic = true;
if ($(";") && !isSemiColonSeperated) {
isSemiColonSeperated = true;
}
(isSemiColonSeperated ? argsSemiColon : argsComma)
.push({ name: arg.name, variadic: true });
break;
} else if (!isCall) {
name = nameLoop = val.name;
value = null;
}
}
if (value) {
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;
}
}
returner.args = isSemiColonSeperated ? argsSemiColon : argsComma;
return returner;
},
//
// 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, 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];
var argInfo = this.mixin.args.call(this, false);
params = argInfo.args;
variadic = argInfo.variadic;
// .mixincall("@{a}");
// looks a bit like a mixin definition.. so we have to be nice and restore
if (!$(')')) {
furthest = i;
restore();
}
$(this.comments);
if ($(/^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, 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.selector))) &&
$(')')) {
e = new(tree.Paren)(v);
}
}
}
if (e) { return new(tree.Element)(c, e, i, env.currentFileInfo); }
},
//
// 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 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 (see selector below)
// with less extensions e.g. the ability to extend and guard
//
lessSelector: function () {
return this.selector(true);
},
//
// A CSS Selector
//
// .class > div + h1
// li a:hover
//
// Selectors are made out of one or more Elements, see above.
//
selector: function (isLess) {
var e, elements = [], c, extend, extendList = [], when, condition;
while ((isLess && (extend = $(this.extend))) || (isLess && (when = $(/^when/))) || (e = $(this.element))) {
if (when) {
condition = expect(this.conditions, 'expected condition');
} else if (condition) {
error("CSS guard can only be used at the end of selector");
} else if (extend) {
extendList.push.apply(extendList, extend);
} else {
if (extendList.length) {
error("Extend can only be used at the end of selector");
}
c = input.charAt(i);
elements.push(e);
e = null;
}
if (c === '{' || c === '}' || c === ';' || c === ',' || c === ')') {
break;
}
}
if (elements.length > 0) { return new(tree.Selector)(elements, extendList, condition, i, env.currentFileInfo); }
if (extendList.length) { error("Extend must be used to extend a selector, it cannot be used on its own"); }
},
attribute: function () {
var key, val, op;
if (! $('[')) { return; }
if (!(key = $(this.entities.variableCurly))) {
key = expect(/^(?:[_A-Za-z0-9-\*]*\|)?(?:[_A-Za-z0-9-]|\\.)+/);
}
if ((op = $(/^[|~*$^]?=/))) {
val = $(this.entities.quoted) || $(/^[0-9]+%/) || $(/^[\w-]+/) || $(this.entities.variableCurly);
}
expect(']');
return new(tree.Attribute)(key, op, val);
},
//
// The `block` rule is used by `ruleset` and `mixin.definition`.
// It's a wrapper around the `primary` rule, with added `{}`.
//
block: function () {
var content;
if ($('{') && (content = $(this.primary)) && $('}')) {
return content;
}
},
//
// div, .class, body > p {...}
//
ruleset: function () {
var selectors = [], s, rules, debugInfo;
save();
if (env.dumpLineNumbers) {
debugInfo = getDebugInfo(i, input, env);
}
while (s = $(this.lessSelector)) {
selectors.push(s);
$(this.comments);
if (! $(',')) { break; }
if (s.condition) {
error("Guards are only currently allowed on a single selector.");
}
$(this.comments);
}
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 (tryAnonymous) {
var name, value, c = input.charAt(i), important, merge = false;
save();
if (c === '.' || c === '#' || c === '&') { return; }
if (name = $(this.variable) || $(this.ruleProperty)) {
// prefer to try to parse first if its a variable or we are compressing
// but always fallback on the other one
value = !tryAnonymous && (env.compress || (name.charAt(0) === '@')) ?
($(this.value) || $(this.anonymousValue)) :
($(this.anonymousValue) || $(this.value));
important = $(this.important);
if (name[name.length-1] === "+") {
merge = true;
name = name.substr(0, name.length - 1);
}
if (value && $(this.end)) {
return new (tree.Rule)(name, value, important, merge, memo, env.currentFileInfo);
} else {
furthest = i;
restore();
if (value && !tryAnonymous) {
return this.rule(true);
}
}
}
},
anonymousValue: function () {
var match;
if (match = /^([^@+\/'"*`(;{}-]*);/.exec(chunks[j])) {
i += match[0].length - 1;
return new(tree.Anonymous)(match[1]);
}
},
//
// 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?\s+/);
var options = (dir ? $(this.importOptions) : null) || {};
if (dir && (path = $(this.entities.quoted) || $(this.entities.url))) {
features = $(this.mediaFeatures);
if ($(';')) {
features = features && new(tree.Value)(features);
return new(tree.Import)(path, features, options, index, env.currentFileInfo);
}
}
restore();
},
importOptions: function() {
var o, options = {}, optionName, value;
// list of options, surrounded by parens
if (! $('(')) { return null; }
do {
if (o = $(this.importOption)) {
optionName = o;
value = true;
switch(optionName) {
case "css":
optionName = "less";
value = false;
break;
case "once":
optionName = "multiple";
value = false;
break;
}
options[optionName] = value;
if (! $(',')) { break; }
}
} while (o);
expect(')');
return options;
},
importOption: function() {
var opt = $(/^(less|css|multiple|once|inline|reference)/);
if (opt) {
return opt[1];
}
},
mediaFeature: function () {
var e, p, nodes = [];
do {
if (e = ($(this.entities.keyword) || $(this.entities.variable))) {
nodes.push(e);
} else if ($('(')) {
p = $(this.property);
e = $(this.value);
if ($(')')) {
if (p && e) {
nodes.push(new(tree.Paren)(new(tree.Rule)(p, e, null, null, i, env.currentFileInfo, 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, i, env.currentFileInfo);
if (env.dumpLineNumbers) {
media.debugInfo = debugInfo;
}
return media;
}
}
},
//
// A CSS Directive
//
// @charset "utf-8";
//
directive: function () {
var name, value, rules, nonVendorSpecificName,
hasBlock, hasIdentifier, hasExpression, identifier;
if (input.charAt(i) !== '@') { return; }
if (value = $(this['import']) || $(this.media)) {
return value;
}
save();
name = $(/^@[a-z-]+/);
if (!name) { return; }
nonVendorSpecificName = name;
if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) {
nonVendorSpecificName = "@" + name.slice(name.indexOf('-', 2) + 1);
}
switch(nonVendorSpecificName) {
case "@font-face":
hasBlock = true;
break;
case "@viewport":
case "@top-left":
case "@top-left-corner":
case "@top-center":
case "@top-right":
case "@top-right-corner":
case "@bottom-left":
case "@bottom-left-corner":
case "@bottom-center":
case "@bottom-right":
case "@bottom-right-corner":
case "@left-top":
case "@left-middle":
case "@left-bottom":
case "@right-top":
case "@right-middle":
case "@right-bottom":
hasBlock = true;
break;
case "@host":
case "@page":
case "@document":
case "@supports":
case "@keyframes":
hasBlock = true;
hasIdentifier = true;
break;
case "@namespace":
hasExpression = true;
break;
}
if (hasIdentifier) {
identifier = ($(/^[^{]+/) || '').trim();
if (identifier) {
name += " " + identifier;
}
}
if (hasBlock)
{
if (rules = $(this.block)) {
return new(tree.Directive)(name, rules, i, env.currentFileInfo);
}
} else {
if ((value = hasExpression ? $(this.expression) : $(this.entity)) && $(';')) {
var directive = new(tree.Directive)(name, value, i, env.currentFileInfo);
if (env.dumpLineNumbers) {
directive.debugInfo = getDebugInfo(i, input, env);
}
return directive;
}
}
restore();
},
//
// 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 = [];
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 $(/^! *important/);
}
},
sub: function () {
var a, e;
if ($('(')) {
if (a = $(this.addition)) {
e = new(tree.Expression)([a]);
expect(')');
e.parens = true;
return e;
}
}
},
multiplication: function () {
var m, a, op, operation, isSpaced;
if (m = $(this.operand)) {
isSpaced = isWhitespace(input.charAt(i - 1));
while (!peek(/^\/[*\/]/) && (op = ($('/') || $('*')))) {
if (a = $(this.operand)) {
m.parensInOp = true;
a.parensInOp = true;
operation = new(tree.Operation)(op, [operation || m, a], isSpaced);
isSpaced = isWhitespace(input.charAt(i - 1));
} else {
break;
}
}
return operation || m;
}
},
addition: function () {
var m, a, op, operation, isSpaced;
if (m = $(this.multiplication)) {
isSpaced = isWhitespace(input.charAt(i - 1));
while ((op = $(/^[-+]\s+/) || (!isSpaced && ($('+') || $('-')))) &&
(a = $(this.multiplication))) {
m.parensInOp = true;
a.parensInOp = true;
operation = new(tree.Operation)(op, [operation || m, a], isSpaced);
isSpaced = isWhitespace(input.charAt(i - 1));
}
return operation || m;
}
},
conditions: function () {
var a, b, index = i, condition;
if (a = $(this.condition)) {
while (peek(/^,\s*(not\s*)?\(/) && $(',') && (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);
if (negate) {
o.parensInOp = true;
o = new(tree.Negative)(o);
}
return o;
},
//
// Expressions either represent mathematical operations,
// or white-space delimited Entities.
//
// 1px solid black
// @var * 2
//
expression: function () {
var e, delim, entities = [];
while (e = $(this.addition) || $(this.entity)) {
entities.push(e);
// operations do not allow keyword "/" dimension (e.g. small/20px) so we support that here
if (!peek(/^\/[\/*]/) && (delim = $('/'))) {
entities.push(new(tree.Anonymous)(delim));
}
}
if (entities.length > 0) {
return new(tree.Expression)(entities);
}
},
property: function () {
var name;
if (name = $(/^(\*?-?[_a-zA-Z0-9-]+)\s*:/)) {
return name[1];
}
},
ruleProperty: function () {
var name;
if (name = $(/^(\*?-?[_a-zA-Z0-9-]+)\s*(\+?)\s*:/)) {
return name[1] + (name[2] || "");
}
}
}
};
};
(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) {
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; }
}
h = (number(h) % 360) / 360;
s = clamp(number(s)); l = clamp(number(l)); a = clamp(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);
},
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), '%');
},
hsvhue: function(color) {
return new(tree.Dimension)(Math.round(color.toHSV().h));
},
hsvsaturation: function (color) {
return new(tree.Dimension)(Math.round(color.toHSV().s * 100), '%');
},
hsvvalue: function (color) {
return new(tree.Dimension)(Math.round(color.toHSV().v * 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(color.luma() * color.alpha * 100), '%');
},
saturate: function (color, amount) {
// filter: saturate(3.2);
// should be kept as is, so check for color
if (!color.rgb) {
return null;
}
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);
}
//Figure out which is actually light and dark!
if (dark.luma() > light.luma()) {
var t = light;
light = dark;
dark = t;
}
if (typeof threshold === 'undefined') {
threshold = 0.43;
} else {
threshold = number(threshold);
}
if ((color.luma() * 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++) {
/*jshint loopfunc:true */
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) {
if(!(val instanceof tree.Dimension)) {
throw { type: "Argument", message: "the first argument to unit must be a number" + (val instanceof tree.Operation ? ". Have you forgotten parenthesis?" : "") };
}
return new(tree.Dimension)(val.value, unit ? unit.toCSS() : "");
},
convert: function (val, unit) {
return val.convertTo(unit.value);
},
round: function (n, f) {
var fraction = typeof(f) === "undefined" ? 0 : f.value;
return this._math(function(num) { return num.toFixed(fraction); }, null, n);
},
pi: function () {
return new(tree.Dimension)(Math.PI);
},
mod: function(a, b) {
return new(tree.Dimension)(a.value % b.value, a.unit);
},
pow: function(x, y) {
if (typeof x === "number" && typeof y === "number") {
x = new(tree.Dimension)(x);
y = new(tree.Dimension)(y);
} else if (!(x instanceof tree.Dimension) || !(y instanceof tree.Dimension)) {
throw { type: "Argument", message: "arguments must be numbers" };
}
return new(tree.Dimension)(Math.pow(x.value, y.value), x.unit);
},
_math: function (fn, unit, n) {
if (n instanceof tree.Dimension) {
/*jshint eqnull:true */
return new(tree.Dimension)(fn(parseFloat(n.value)), unit == null ? n.unit : unit);
} else if (typeof(n) === 'number') {
return fn(n);
} else {
throw { type: "Argument", message: "argument must be a number" };
}
},
_minmax: function (isMin, args) {
args = Array.prototype.slice.call(args);
switch(args.length) {
case 0: throw { type: "Argument", message: "one or more arguments required" };
case 1: return args[0];
}
var i, j, current, currentUnified, referenceUnified, unit,
order = [], // elems only contains original argument values.
values = {}; // key is the unit.toString() for unified tree.Dimension values,
// value is the index into the order array.
for (i = 0; i < args.length; i++) {
current = args[i];
if (!(current instanceof tree.Dimension)) {
order.push(current);
continue;
}
currentUnified = current.unify();
unit = currentUnified.unit.toString();
j = values[unit];
if (j === undefined) {
values[unit] = order.length;
order.push(current);
continue;
}
referenceUnified = order[j].unify();
if ( isMin && currentUnified.value < referenceUnified.value ||
!isMin && currentUnified.value > referenceUnified.value) {
order[j] = current;
}
}
if (order.length == 1) {
return order[0];
}
args = order.map(function (a) { return a.toCSS(this.env); })
.join(this.env.compress ? "," : ", ");
return new(tree.Anonymous)((isMin ? "min" : "max") + "(" + args + ")");
},
min: function () {
return this._minmax(true, arguments);
},
max: function () {
return this._minmax(false, arguments);
},
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) {
var colorCandidate = n.value,
returnColor;
returnColor = tree.Color.fromKeyword(colorCandidate);
if (returnColor) {
return returnColor;
}
if (/^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})/.test(colorCandidate)) {
return new(tree.Color)(colorCandidate.slice(1));
}
throw { type: "Argument", message: "argument must be a color keyword or 3/6 digit hex e.g. #FFF" };
} 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 this.isunit(n, 'px');
},
ispercentage: function (n) {
return this.isunit(n, '%');
},
isem: function (n) {
return this.isunit(n, 'em');
},
isunit: function (n, unit) {
return (n instanceof tree.Dimension) && n.unit.is(unit.value || unit) ? 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);
},
extract: function(values, index) {
index = index.value - 1; // (1-based index)
// handle non-array values as an array of length 1
// return 'undefined' if index is invalid
return Array.isArray(values.value)
? values.value[index] : Array(values)[index];
},
length: function(values) {
var n = Array.isArray(values.value) ? values.value.length : 1;
return new tree.Dimension(n);
},
"data-uri": function(mimetypeNode, filePathNode) {
if (typeof window !== 'undefined') {
return new tree.URL(filePathNode || mimetypeNode, this.currentFileInfo).eval(this.env);
}
var mimetype = mimetypeNode.value;
var filePath = (filePathNode && filePathNode.value);
var fs = require("fs"),
path = require("path"),
useBase64 = false;
if (arguments.length < 2) {
filePath = mimetype;
}
if (this.env.isPathRelative(filePath)) {
if (this.currentFileInfo.relativeUrls) {
filePath = path.join(this.currentFileInfo.currentDirectory, filePath);
} else {
filePath = path.join(this.currentFileInfo.entryPath, filePath);
}
}
// detect the mimetype if not given
if (arguments.length < 2) {
var mime;
try {
mime = require('mime');
} catch (ex) {
mime = tree._mime;
}
mimetype = mime.lookup(filePath);
// use base 64 unless it's an ASCII or UTF-8 format
var charset = mime.charsets.lookup(mimetype);
useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0;
if (useBase64) { mimetype += ';base64'; }
}
else {
useBase64 = /;base64$/.test(mimetype);
}
var buf = fs.readFileSync(filePath);
// IE8 cannot handle a data-uri larger than 32KB. If this is exceeded
// and the --ieCompat flag is enabled, return a normal url() instead.
var DATA_URI_MAX_KB = 32,
fileSizeInKB = parseInt((buf.length / 1024), 10);
if (fileSizeInKB >= DATA_URI_MAX_KB) {
if (this.env.ieCompat !== false) {
if (!this.env.silent) {
console.warn("Skipped data-uri embedding of %s because its size (%dKB) exceeds IE8-safe %dKB!", filePath, fileSizeInKB, DATA_URI_MAX_KB);
}
return new tree.URL(filePathNode || mimetypeNode, this.currentFileInfo).eval(this.env);
}
}
buf = useBase64 ? buf.toString('base64')
: encodeURIComponent(buf);
var uri = "'data:" + mimetype + ',' + buf + "'";
return new(tree.URL)(new(tree.Anonymous)(uri));
},
"svg-gradient": function(direction) {
function throwArgumentDescriptor() {
throw { type: "Argument", message: "svg-gradient expects direction, start_color [start_position], [color position,]..., end_color [end_position]" };
}
if (arguments.length < 3) {
throwArgumentDescriptor();
}
var stops = Array.prototype.slice.call(arguments, 1),
gradientDirectionSvg,
gradientType = "linear",
rectangleDimension = 'x="0" y="0" width="1" height="1"',
useBase64 = true,
renderEnv = {compress: false},
returner,
directionValue = direction.toCSS(renderEnv),
i, color, position, positionValue, alpha;
switch (directionValue) {
case "to bottom":
gradientDirectionSvg = 'x1="0%" y1="0%" x2="0%" y2="100%"';
break;
case "to right":
gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="0%"';
break;
case "to bottom right":
gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="100%"';
break;
case "to top right":
gradientDirectionSvg = 'x1="0%" y1="100%" x2="100%" y2="0%"';
break;
case "ellipse":
case "ellipse at center":
gradientType = "radial";
gradientDirectionSvg = 'cx="50%" cy="50%" r="75%"';
rectangleDimension = 'x="-50" y="-50" width="101" height="101"';
break;
default:
throw { type: "Argument", message: "svg-gradient direction must be 'to bottom', 'to right', 'to bottom right', 'to top right' or 'ellipse at center'" };
}
returner = '<?xml version="1.0" ?>' +
'<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="100%" height="100%" viewBox="0 0 1 1" preserveAspectRatio="none">' +
'<' + gradientType + 'Gradient id="gradient" gradientUnits="userSpaceOnUse" ' + gradientDirectionSvg + '>';
for (i = 0; i < stops.length; i+= 1) {
if (stops[i].value) {
color = stops[i].value[0];
position = stops[i].value[1];
} else {
color = stops[i];
position = undefined;
}
if (!(color instanceof tree.Color) || (!((i === 0 || i+1 === stops.length) && position === undefined) && !(position instanceof tree.Dimension))) {
throwArgumentDescriptor();
}
positionValue = position ? position.toCSS(renderEnv) : i === 0 ? "0%" : "100%";
alpha = color.alpha;
returner += '<stop offset="' + positionValue + '" stop-color="' + color.toRGB() + '"' + (alpha < 1 ? ' stop-opacity="' + alpha + '"' : '') + '/>';
}
returner += '</' + gradientType + 'Gradient>' +
'<rect ' + rectangleDimension + ' fill="url(#gradient)" /></svg>';
if (useBase64) {
// only works in node, needs interface to what is supported in environment
try {
returner = new Buffer(returner).toString('base64');
} catch(e) {
useBase64 = false;
}
}
returner = "'data:image/svg+xml" + (useBase64 ? ";base64" : "") + "," + returner + "'";
return new(tree.URL)(new(tree.Anonymous)(returner));
}
};
// these static methods are used as a fallback when the optional 'mime' dependency is missing
tree._mime = {
// this map is intentionally incomplete
// if you want more, install 'mime' dep
_types: {
'.htm' : 'text/html',
'.html': 'text/html',
'.gif' : 'image/gif',
'.jpg' : 'image/jpeg',
'.jpeg': 'image/jpeg',
'.png' : 'image/png'
},
lookup: function (filepath) {
var ext = require('path').extname(filepath),
type = tree._mime._types[ext];
if (type === undefined) {
throw new Error('Optional dependency "mime" is required for ' + ext);
}
return type;
},
charsets: {
lookup: function (type) {
// assumes all text types are UTF-8
return type && (/^text\//).test(type) ? 'UTF-8' : '';
}
}
};
var mathFunctions = [{name:"ceil"}, {name:"floor"}, {name: "sqrt"}, {name:"abs"},
{name:"tan", unit: ""}, {name:"sin", unit: ""}, {name:"cos", unit: ""},
{name:"atan", unit: "rad"}, {name:"asin", unit: "rad"}, {name:"acos", unit: "rad"}],
createMathFunction = function(name, unit) {
return function(n) {
/*jshint eqnull:true */
if (unit != null) {
n = n.unify();
}
return this._math(Math[name], unit, n);
};
};
for(var i = 0; i < mathFunctions.length; i++) {
tree.functions[mathFunctions[i].name] = createMathFunction(mathFunctions[i].name, mathFunctions[i].unit);
}
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.is('%')) {
return parseFloat(n.value * size / 100);
} else {
return number(n);
}
}
function number(n) {
if (n instanceof tree.Dimension) {
return parseFloat(n.unit.is('%') ? 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));
}
tree.functionCall = function(env, currentFileInfo) {
this.env = env;
this.currentFileInfo = currentFileInfo;
};
tree.functionCall.prototype = tree.functions;
})(require('./tree'));
(function (tree) {
tree.colors = {
'aliceblue':'#f0f8ff',
'antiquewhite':'#faebd7',
'aqua':'#00ffff',
'aquamarine':'#7fffd4',
'azure':'#f0ffff',
'beige':'#f5f5dc',
'bisque':'#ffe4c4',
'black':'#000000',
'blanchedalmond':'#ffebcd',
'blue':'#0000ff',
'blueviolet':'#8a2be2',
'brown':'#a52a2a',
'burlywood':'#deb887',
'cadetblue':'#5f9ea0',
'chartreuse':'#7fff00',
'chocolate':'#d2691e',
'coral':'#ff7f50',
'cornflowerblue':'#6495ed',
'cornsilk':'#fff8dc',
'crimson':'#dc143c',
'cyan':'#00ffff',
'darkblue':'#00008b',
'darkcyan':'#008b8b',
'darkgoldenrod':'#b8860b',
'darkgray':'#a9a9a9',
'darkgrey':'#a9a9a9',
'darkgreen':'#006400',
'darkkhaki':'#bdb76b',
'darkmagenta':'#8b008b',
'darkolivegreen':'#556b2f',
'darkorange':'#ff8c00',
'darkorchid':'#9932cc',
'darkred':'#8b0000',
'darksalmon':'#e9967a',
'darkseagreen':'#8fbc8f',
'darkslateblue':'#483d8b',
'darkslategray':'#2f4f4f',
'darkslategrey':'#2f4f4f',
'darkturquoise':'#00ced1',
'darkviolet':'#9400d3',
'deeppink':'#ff1493',
'deepskyblue':'#00bfff',
'dimgray':'#696969',
'dimgrey':'#696969',
'dodgerblue':'#1e90ff',
'firebrick':'#b22222',
'floralwhite':'#fffaf0',
'forestgreen':'#228b22',
'fuchsia':'#ff00ff',
'gainsboro':'#dcdcdc',
'ghostwhite':'#f8f8ff',
'gold':'#ffd700',
'goldenrod':'#daa520',
'gray':'#808080',
'grey':'#808080',
'green':'#008000',
'greenyellow':'#adff2f',
'honeydew':'#f0fff0',
'hotpink':'#ff69b4',
'indianred':'#cd5c5c',
'indigo':'#4b0082',
'ivory':'#fffff0',
'khaki':'#f0e68c',
'lavender':'#e6e6fa',
'lavenderblush':'#fff0f5',
'lawngreen':'#7cfc00',
'lemonchiffon':'#fffacd',
'lightblue':'#add8e6',
'lightcoral':'#f08080',
'lightcyan':'#e0ffff',
'lightgoldenrodyellow':'#fafad2',
'lightgray':'#d3d3d3',
'lightgrey':'#d3d3d3',
'lightgreen':'#90ee90',
'lightpink':'#ffb6c1',
'lightsalmon':'#ffa07a',
'lightseagreen':'#20b2aa',
'lightskyblue':'#87cefa',
'lightslategray':'#778899',
'lightslategrey':'#778899',
'lightsteelblue':'#b0c4de',
'lightyellow':'#ffffe0',
'lime':'#00ff00',
'limegreen':'#32cd32',
'linen':'#faf0e6',
'magenta':'#ff00ff',
'maroon':'#800000',
'mediumaquamarine':'#66cdaa',
'mediumblue':'#0000cd',
'mediumorchid':'#ba55d3',
'mediumpurple':'#9370d8',
'mediumseagreen':'#3cb371',
'mediumslateblue':'#7b68ee',
'mediumspringgreen':'#00fa9a',
'mediumturquoise':'#48d1cc',
'mediumvioletred':'#c71585',
'midnightblue':'#191970',
'mintcream':'#f5fffa',
'mistyrose':'#ffe4e1',
'moccasin':'#ffe4b5',
'navajowhite':'#ffdead',
'navy':'#000080',
'oldlace':'#fdf5e6',
'olive':'#808000',
'olivedrab':'#6b8e23',
'orange':'#ffa500',
'orangered':'#ff4500',
'orchid':'#da70d6',
'palegoldenrod':'#eee8aa',
'palegreen':'#98fb98',
'paleturquoise':'#afeeee',
'palevioletred':'#d87093',
'papayawhip':'#ffefd5',
'peachpuff':'#ffdab9',
'peru':'#cd853f',
'pink':'#ffc0cb',
'plum':'#dda0dd',
'powderblue':'#b0e0e6',
'purple':'#800080',
'red':'#ff0000',
'rosybrown':'#bc8f8f',
'royalblue':'#4169e1',
'saddlebrown':'#8b4513',
'salmon':'#fa8072',
'sandybrown':'#f4a460',
'seagreen':'#2e8b57',
'seashell':'#fff5ee',
'sienna':'#a0522d',
'silver':'#c0c0c0',
'skyblue':'#87ceeb',
'slateblue':'#6a5acd',
'slategray':'#708090',
'slategrey':'#708090',
'snow':'#fffafa',
'springgreen':'#00ff7f',
'steelblue':'#4682b4',
'tan':'#d2b48c',
'teal':'#008080',
'thistle':'#d8bfd8',
'tomato':'#ff6347',
'turquoise':'#40e0d0',
'violet':'#ee82ee',
'wheat':'#f5deb3',
'white':'#ffffff',
'whitesmoke':'#f5f5f5',
'yellow':'#ffff00',
'yellowgreen':'#9acd32'
};
})(require('./tree'));
(function (tree) {
tree.debugInfo = function(env, ctx, lineSeperator) {
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) + (lineSeperator || "") + 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, function (a) {
if (a == '\\') {
a = '\/';
}
return '\\' + a;
}) +
'}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);
}
};
tree.toCSS = function (env) {
var strs = [];
this.genCSS(env, {
add: function(chunk, fileInfo, index) {
strs.push(chunk);
},
isEmpty: function () {
return strs.length === 0;
}
});
return strs.join('');
};
tree.outputRuleset = function (env, output, rules) {
output.add((env.compress ? '{' : ' {\n'));
env.tabLevel = (env.tabLevel || 0) + 1;
var tabRuleStr = env.compress ? '' : Array(env.tabLevel + 1).join(" "),
tabSetStr = env.compress ? '' : Array(env.tabLevel).join(" ");
for(var i = 0; i < rules.length; i++) {
output.add(tabRuleStr);
rules[i].genCSS(env, output);
output.add(env.compress ? '' : '\n');
}
env.tabLevel--;
output.add(tabSetStr + "}");
};
})(require('./tree'));
(function (tree) {
tree.Alpha = function (val) {
this.value = val;
};
tree.Alpha.prototype = {
type: "Alpha",
accept: function (visitor) {
this.value = visitor.visit(this.value);
},
eval: function (env) {
if (this.value.eval) { return new tree.Alpha(this.value.eval(env)); }
return this;
},
genCSS: function (env, output) {
output.add("alpha(opacity=");
if (this.value.genCSS) {
this.value.genCSS(env, output);
} else {
output.add(this.value);
}
output.add(")");
},
toCSS: tree.toCSS
};
})(require('../tree'));
(function (tree) {
tree.Anonymous = function (string, index, currentFileInfo, mapLines) {
this.value = string.value || string;
this.index = index;
this.mapLines = mapLines;
this.currentFileInfo = currentFileInfo;
};
tree.Anonymous.prototype = {
type: "Anonymous",
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;
},
genCSS: function (env, output) {
output.add(this.value, this.currentFileInfo, this.index, this.mapLines);
},
toCSS: tree.toCSS
};
})(require('../tree'));
(function (tree) {
tree.Assignment = function (key, val) {
this.key = key;
this.value = val;
};
tree.Assignment.prototype = {
type: "Assignment",
accept: function (visitor) {
this.value = visitor.visit(this.value);
},
eval: function (env) {
if (this.value.eval) {
return new(tree.Assignment)(this.key, this.value.eval(env));
}
return this;
},
genCSS: function (env, output) {
output.add(this.key + '=');
if (this.value.genCSS) {
this.value.genCSS(env, output);
} else {
output.add(this.value);
}
},
toCSS: tree.toCSS
};
})(require('../tree'));
(function (tree) {
//
// A function call node.
//
tree.Call = function (name, args, index, currentFileInfo) {
this.name = name;
this.args = args;
this.index = index;
this.currentFileInfo = currentFileInfo;
};
tree.Call.prototype = {
type: "Call",
accept: function (visitor) {
this.args = visitor.visit(this.args);
},
//
// 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); }),
nameLC = this.name.toLowerCase(),
result, func;
if (nameLC in tree.functions) { // 1.
try {
func = new tree.functionCall(env, this.currentFileInfo);
result = func[nameLC].apply(func, args);
/*jshint eqnull:true */
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.currentFileInfo.filename };
}
}
return new tree.Call(this.name, args, this.index, this.currentFileInfo);
},
genCSS: function (env, output) {
output.add(this.name + "(", this.currentFileInfo, this.index);
for(var i = 0; i < this.args.length; i++) {
this.args[i].genCSS(env, output);
if (i + 1 < this.args.length) {
output.add(", ");
}
}
output.add(")");
},
toCSS: tree.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;
};
var transparentKeyword = "transparent";
tree.Color.prototype = {
type: "Color",
eval: function () { return this; },
luma: function () { return (0.2126 * this.rgb[0] / 255) + (0.7152 * this.rgb[1] / 255) + (0.0722 * this.rgb[2] / 255); },
genCSS: function (env, output) {
output.add(this.toCSS(env));
},
toCSS: function (env, doNotCompress) {
var compress = env && env.compress && !doNotCompress;
// 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.
if (this.alpha < 1.0) {
if (this.alpha === 0 && this.isTransparentKeyword) {
return transparentKeyword;
}
return "rgba(" + this.rgb.map(function (c) {
return Math.round(c);
}).concat(this.alpha).join(',' + (compress ? '' : ' ')) + ")";
} else {
var color = this.toRGB();
if (compress) {
var splitcolor = color.split('');
// Convert color to short format
if (splitcolor[1] === splitcolor[2] && splitcolor[3] === splitcolor[4] && splitcolor[5] === splitcolor[6]) {
color = '#' + splitcolor[1] + splitcolor[3] + splitcolor[5];
}
}
return color;
}
},
//
// 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 (env, op, other) {
var result = [];
if (! (other instanceof tree.Color)) {
other = other.toColor();
}
for (var c = 0; c < 3; c++) {
result[c] = tree.operate(env, op, this.rgb[c], other.rgb[c]);
}
return new(tree.Color)(result, this.alpha + other.alpha);
},
toRGB: function () {
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('');
},
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 };
},
//Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript
toHSV: 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, v = max;
var d = max - min;
if (max === 0) {
s = 0;
} else {
s = d / max;
}
if (max === min) {
h = 0;
} else {
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, v: v, 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;
}
};
tree.Color.fromKeyword = function(keyword) {
if (tree.colors.hasOwnProperty(keyword)) {
// detect named color
return new(tree.Color)(tree.colors[keyword].slice(1));
}
if (keyword === transparentKeyword) {
var transparent = new(tree.Color)([0, 0, 0], 0);
transparent.isTransparentKeyword = true;
return transparent;
}
};
})(require('../tree'));
(function (tree) {
tree.Comment = function (value, silent, index, currentFileInfo) {
this.value = value;
this.silent = !!silent;
this.currentFileInfo = currentFileInfo;
};
tree.Comment.prototype = {
type: "Comment",
genCSS: function (env, output) {
if (this.debugInfo) {
output.add(tree.debugInfo(env, this), this.currentFileInfo, this.index);
}
output.add(this.value.trim()); //TODO shouldn't need to trim, we shouldn't grab the \n
},
toCSS: tree.toCSS,
isSilent: function(env) {
var isReference = (this.currentFileInfo && this.currentFileInfo.reference && !this.isReferenced),
isCompressed = env.compress && !this.value.match(/^\/\*!/);
return this.silent || isReference || isCompressed;
},
eval: function () { return this; },
markReferenced: function () {
this.isReferenced = true;
}
};
})(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 = {
type: "Condition",
accept: function (visitor) {
this.lvalue = visitor.visit(this.lvalue);
this.rvalue = visitor.visit(this.rvalue);
},
eval: function (env) {
var a = this.lvalue.eval(env),
b = this.rvalue.eval(env);
var i = this.index, result;
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 === '=<' || op === '<=';
case 0: return op === '=' || 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 && unit instanceof tree.Unit) ? unit :
new(tree.Unit)(unit ? [unit] : undefined);
};
tree.Dimension.prototype = {
type: "Dimension",
accept: function (visitor) {
this.unit = visitor.visit(this.unit);
},
eval: function (env) {
return this;
},
toColor: function () {
return new(tree.Color)([this.value, this.value, this.value]);
},
genCSS: function (env, output) {
if ((env && env.strictUnits) && !this.unit.isSingular()) {
throw new Error("Multiple units in dimension. Correct the units or use the unit function. Bad unit: "+this.unit.toString());
}
var value = this.value,
strValue = String(value);
if (value !== 0 && value < 0.000001 && value > -0.000001) {
// would be output 1e-6 etc.
strValue = value.toFixed(20).replace(/0+$/, "");
}
if (env && env.compress) {
// Zero values doesn't need a unit
if (value === 0 && this.unit.isLength()) {
output.add(strValue);
return;
}
// Float values doesn't need a leading zero
if (value > 0 && value < 1) {
strValue = (strValue).substr(1);
}
}
output.add(strValue);
this.unit.genCSS(env, output);
},
toCSS: tree.toCSS,
// In an operation between two Dimensions,
// we default to the first Dimension's unit,
// so `1px + 2` will yield `3px`.
operate: function (env, op, other) {
/*jshint noempty:false */
var value = tree.operate(env, op, this.value, other.value),
unit = this.unit.clone();
if (op === '+' || op === '-') {
if (unit.numerator.length === 0 && unit.denominator.length === 0) {
unit.numerator = other.unit.numerator.slice(0);
unit.denominator = other.unit.denominator.slice(0);
} else if (other.unit.numerator.length === 0 && unit.denominator.length === 0) {
// do nothing
} else {
other = other.convertTo(this.unit.usedUnits());
if(env.strictUnits && other.unit.toString() !== unit.toString()) {
throw new Error("Incompatible units. Change the units or use the unit function. Bad units: '" + unit.toString() +
"' and '" + other.unit.toString() + "'.");
}
value = tree.operate(env, op, this.value, other.value);
}
} else if (op === '*') {
unit.numerator = unit.numerator.concat(other.unit.numerator).sort();
unit.denominator = unit.denominator.concat(other.unit.denominator).sort();
unit.cancel();
} else if (op === '/') {
unit.numerator = unit.numerator.concat(other.unit.denominator).sort();
unit.denominator = unit.denominator.concat(other.unit.numerator).sort();
unit.cancel();
}
return new(tree.Dimension)(value, unit);
},
compare: function (other) {
if (other instanceof tree.Dimension) {
var a = this.unify(), b = other.unify(),
aValue = a.value, bValue = b.value;
if (bValue > aValue) {
return -1;
} else if (bValue < aValue) {
return 1;
} else {
if (!b.unit.isEmpty() && a.unit.compare(b.unit) !== 0) {
return -1;
}
return 0;
}
} else {
return -1;
}
},
unify: function () {
return this.convertTo({ length: 'm', duration: 's', angle: 'rad' });
},
convertTo: function (conversions) {
var value = this.value, unit = this.unit.clone(),
i, groupName, group, targetUnit, derivedConversions = {}, applyUnit;
if (typeof conversions === 'string') {
for(i in tree.UnitConversions) {
if (tree.UnitConversions[i].hasOwnProperty(conversions)) {
derivedConversions = {};
derivedConversions[i] = conversions;
}
}
conversions = derivedConversions;
}
applyUnit = function (atomicUnit, denominator) {
/*jshint loopfunc:true */
if (group.hasOwnProperty(atomicUnit)) {
if (denominator) {
value = value / (group[atomicUnit] / group[targetUnit]);
} else {
value = value * (group[atomicUnit] / group[targetUnit]);
}
return targetUnit;
}
return atomicUnit;
};
for (groupName in conversions) {
if (conversions.hasOwnProperty(groupName)) {
targetUnit = conversions[groupName];
group = tree.UnitConversions[groupName];
unit.map(applyUnit);
}
}
unit.cancel();
return new(tree.Dimension)(value, unit);
}
};
// http://www.w3.org/TR/css3-values/#absolute-lengths
tree.UnitConversions = {
length: {
'm': 1,
'cm': 0.01,
'mm': 0.001,
'in': 0.0254,
'pt': 0.0254 / 72,
'pc': 0.0254 / 72 * 12
},
duration: {
's': 1,
'ms': 0.001
},
angle: {
'rad': 1/(2*Math.PI),
'deg': 1/360,
'grad': 1/400,
'turn': 1
}
};
tree.Unit = function (numerator, denominator, backupUnit) {
this.numerator = numerator ? numerator.slice(0).sort() : [];
this.denominator = denominator ? denominator.slice(0).sort() : [];
this.backupUnit = backupUnit;
};
tree.Unit.prototype = {
type: "Unit",
clone: function () {
return new tree.Unit(this.numerator.slice(0), this.denominator.slice(0), this.backupUnit);
},
genCSS: function (env, output) {
if (this.numerator.length >= 1) {
output.add(this.numerator[0]);
} else
if (this.denominator.length >= 1) {
output.add(this.denominator[0]);
} else
if ((!env || !env.strictUnits) && this.backupUnit) {
output.add(this.backupUnit);
}
},
toCSS: tree.toCSS,
toString: function () {
var i, returnStr = this.numerator.join("*");
for (i = 0; i < this.denominator.length; i++) {
returnStr += "/" + this.denominator[i];
}
return returnStr;
},
compare: function (other) {
return this.is(other.toString()) ? 0 : -1;
},
is: function (unitString) {
return this.toString() === unitString;
},
isLength: function () {
return Boolean(this.toCSS().match(/px|em|%|in|cm|mm|pc|pt|ex/));
},
isEmpty: function () {
return this.numerator.length === 0 && this.denominator.length === 0;
},
isSingular: function() {
return this.numerator.length <= 1 && this.denominator.length === 0;
},
map: function(callback) {
var i;
for (i = 0; i < this.numerator.length; i++) {
this.numerator[i] = callback(this.numerator[i], false);
}
for (i = 0; i < this.denominator.length; i++) {
this.denominator[i] = callback(this.denominator[i], true);
}
},
usedUnits: function() {
var group, result = {}, mapUnit;
mapUnit = function (atomicUnit) {
/*jshint loopfunc:true */
if (group.hasOwnProperty(atomicUnit) && !result[groupName]) {
result[groupName] = atomicUnit;
}
return atomicUnit;
};
for (var groupName in tree.UnitConversions) {
if (tree.UnitConversions.hasOwnProperty(groupName)) {
group = tree.UnitConversions[groupName];
this.map(mapUnit);
}
}
return result;
},
cancel: function () {
var counter = {}, atomicUnit, i, backup;
for (i = 0; i < this.numerator.length; i++) {
atomicUnit = this.numerator[i];
if (!backup) {
backup = atomicUnit;
}
counter[atomicUnit] = (counter[atomicUnit] || 0) + 1;
}
for (i = 0; i < this.denominator.length; i++) {
atomicUnit = this.denominator[i];
if (!backup) {
backup = atomicUnit;
}
counter[atomicUnit] = (counter[atomicUnit] || 0) - 1;
}
this.numerator = [];
this.denominator = [];
for (atomicUnit in counter) {
if (counter.hasOwnProperty(atomicUnit)) {
var count = counter[atomicUnit];
if (count > 0) {
for (i = 0; i < count; i++) {
this.numerator.push(atomicUnit);
}
} else if (count < 0) {
for (i = 0; i < -count; i++) {
this.denominator.push(atomicUnit);
}
}
}
}
if (this.numerator.length === 0 && this.denominator.length === 0 && backup) {
this.backupUnit = backup;
}
this.numerator.sort();
this.denominator.sort();
}
};
})(require('../tree'));
(function (tree) {
tree.Directive = function (name, value, index, currentFileInfo) {
this.name = name;
if (Array.isArray(value)) {
this.rules = [new(tree.Ruleset)([], value)];
this.rules[0].allowImports = true;
} else {
this.value = value;
}
this.currentFileInfo = currentFileInfo;
};
tree.Directive.prototype = {
type: "Directive",
accept: function (visitor) {
this.rules = visitor.visit(this.rules);
this.value = visitor.visit(this.value);
},
genCSS: function (env, output) {
output.add(this.name, this.currentFileInfo, this.index);
if (this.rules) {
tree.outputRuleset(env, output, this.rules);
} else {
output.add(' ');
this.value.genCSS(env, output);
output.add(';');
}
},
toCSS: tree.toCSS,
eval: function (env) {
var evaldDirective = this;
if (this.rules) {
env.frames.unshift(this);
evaldDirective = new(tree.Directive)(this.name, null, this.index, this.currentFileInfo);
evaldDirective.rules = [this.rules[0].eval(env)];
evaldDirective.rules[0].root = true;
env.frames.shift();
}
return evaldDirective;
},
variable: function (name) { return tree.Ruleset.prototype.variable.call(this.rules[0], name); },
find: function () { return tree.Ruleset.prototype.find.apply(this.rules[0], arguments); },
rulesets: function () { return tree.Ruleset.prototype.rulesets.apply(this.rules[0]); },
markReferenced: function () {
var i, rules;
this.isReferenced = true;
if (this.rules) {
rules = this.rules[0].rules;
for (i = 0; i < rules.length; i++) {
if (rules[i].markReferenced) {
rules[i].markReferenced();
}
}
}
}
};
})(require('../tree'));
(function (tree) {
tree.Element = function (combinator, value, index, currentFileInfo) {
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;
this.currentFileInfo = currentFileInfo;
};
tree.Element.prototype = {
type: "Element",
accept: function (visitor) {
this.combinator = visitor.visit(this.combinator);
this.value = visitor.visit(this.value);
},
eval: function (env) {
return new(tree.Element)(this.combinator,
this.value.eval ? this.value.eval(env) : this.value,
this.index,
this.currentFileInfo);
},
genCSS: function (env, output) {
output.add(this.toCSS(env), this.currentFileInfo, this.index);
},
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.Attribute = function (key, op, value) {
this.key = key;
this.op = op;
this.value = value;
};
tree.Attribute.prototype = {
type: "Attribute",
accept: function (visitor) {
this.value = visitor.visit(this.value);
},
eval: function (env) {
return new(tree.Attribute)(this.key.eval ? this.key.eval(env) : this.key,
this.op, (this.value && this.value.eval) ? this.value.eval(env) : this.value);
},
genCSS: function (env, output) {
output.add(this.toCSS(env));
},
toCSS: function (env) {
var value = this.key.toCSS ? this.key.toCSS(env) : this.key;
if (this.op) {
value += this.op;
value += (this.value.toCSS ? this.value.toCSS(env) : this.value);
}
return '[' + value + ']';
}
};
tree.Combinator = function (value) {
if (value === ' ') {
this.value = ' ';
} else {
this.value = value ? value.trim() : "";
}
};
tree.Combinator.prototype = {
type: "Combinator",
_outputMap: {
'' : '',
' ' : ' ',
':' : ' :',
'+' : ' + ',
'~' : ' ~ ',
'>' : ' > ',
'|' : '|'
},
_outputMapCompressed: {
'' : '',
' ' : ' ',
':' : ' :',
'+' : '+',
'~' : '~',
'>' : '>',
'|' : '|'
},
genCSS: function (env, output) {
output.add((env.compress ? this._outputMapCompressed : this._outputMap)[this.value]);
},
toCSS: tree.toCSS
};
})(require('../tree'));
(function (tree) {
tree.Expression = function (value) { this.value = value; };
tree.Expression.prototype = {
type: "Expression",
accept: function (visitor) {
this.value = visitor.visit(this.value);
},
eval: function (env) {
var returnValue,
inParenthesis = this.parens && !this.parensInOp,
doubleParen = false;
if (inParenthesis) {
env.inParenthesis();
}
if (this.value.length > 1) {
returnValue = new(tree.Expression)(this.value.map(function (e) {
return e.eval(env);
}));
} else if (this.value.length === 1) {
if (this.value[0].parens && !this.value[0].parensInOp) {
doubleParen = true;
}
returnValue = this.value[0].eval(env);
} else {
returnValue = this;
}
if (inParenthesis) {
env.outOfParenthesis();
}
if (this.parens && this.parensInOp && !(env.isMathOn()) && !doubleParen) {
returnValue = new(tree.Paren)(returnValue);
}
return returnValue;
},
genCSS: function (env, output) {
for(var i = 0; i < this.value.length; i++) {
this.value[i].genCSS(env, output);
if (i + 1 < this.value.length) {
output.add(" ");
}
}
},
toCSS: tree.toCSS,
throwAwayComments: function () {
this.value = this.value.filter(function(v) {
return !(v instanceof tree.Comment);
});
}
};
})(require('../tree'));
(function (tree) {
tree.Extend = function Extend(selector, option, index) {
this.selector = selector;
this.option = option;
this.index = index;
switch(option) {
case "all":
this.allowBefore = true;
this.allowAfter = true;
break;
default:
this.allowBefore = false;
this.allowAfter = false;
break;
}
};
tree.Extend.prototype = {
type: "Extend",
accept: function (visitor) {
this.selector = visitor.visit(this.selector);
},
eval: function (env) {
return new(tree.Extend)(this.selector.eval(env), this.option, this.index);
},
clone: function (env) {
return new(tree.Extend)(this.selector, this.option, this.index);
},
findSelfSelectors: function (selectors) {
var selfElements = [],
i,
selectorElements;
for(i = 0; i < selectors.length; i++) {
selectorElements = selectors[i].elements;
// duplicate the logic in genCSS function inside the selector node.
// future TODO - move both logics into the selector joiner visitor
if (i > 0 && selectorElements.length && selectorElements[0].combinator.value === "") {
selectorElements[0].combinator.value = ' ';
}
selfElements = selfElements.concat(selectors[i].elements);
}
this.selfSelectors = [{ elements: selfElements }];
}
};
})(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, features, options, index, currentFileInfo) {
this.options = options;
this.index = index;
this.path = path;
this.features = features;
this.currentFileInfo = currentFileInfo;
if (this.options.less !== undefined || this.options.inline) {
this.css = !this.options.less || this.options.inline;
} else {
var pathValue = this.getPath();
if (pathValue && /css([\?;].*)?$/.test(pathValue)) {
this.css = true;
}
}
};
//
// 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 = {
type: "Import",
accept: function (visitor) {
this.features = visitor.visit(this.features);
this.path = visitor.visit(this.path);
if (!this.options.inline) {
this.root = visitor.visit(this.root);
}
},
genCSS: function (env, output) {
if (this.css) {
output.add("@import ", this.currentFileInfo, this.index);
this.path.genCSS(env, output);
if (this.features) {
output.add(" ");
this.features.genCSS(env, output);
}
output.add(';');
}
},
toCSS: tree.toCSS,
getPath: function () {
if (this.path instanceof tree.Quoted) {
var path = this.path.value;
return (this.css !== undefined || /(\.[a-z]*$)|([\?;].*)$/.test(path)) ? path : path + '.less';
} else if (this.path instanceof tree.URL) {
return this.path.value.value;
}
return null;
},
evalForImport: function (env) {
return new(tree.Import)(this.path.eval(env), this.features, this.options, this.index, this.currentFileInfo);
},
evalPath: function (env) {
var path = this.path.eval(env);
var rootpath = this.currentFileInfo && this.currentFileInfo.rootpath;
if (!(path instanceof tree.URL)) {
if (rootpath) {
var pathValue = path.value;
// Add the base path if the import is relative
if (pathValue && env.isPathRelative(pathValue)) {
path.value = rootpath + pathValue;
}
}
path.value = env.normalizePath(path.value);
}
return path;
},
eval: function (env) {
var ruleset, features = this.features && this.features.eval(env);
if (this.skip) { return []; }
if (this.options.inline) {
//todo needs to reference css file not import
var contents = new(tree.Anonymous)(this.root, 0, {filename: this.importedFilename}, true);
return this.features ? new(tree.Media)([contents], this.features.value) : [contents];
} else if (this.css) {
var newImport = new(tree.Import)(this.evalPath(env), features, this.options, this.index);
if (!newImport.css && this.error) {
throw this.error;
}
return newImport;
} 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 = {
type: "JavaScript",
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: " + e.message + " from `" + expression + "`" ,
index: this.index };
}
for (var k in env.frames[0].variables()) {
/*jshint loopfunc:true */
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 = {
type: "Keyword",
eval: function () { return this; },
genCSS: function (env, output) {
output.add(this.value);
},
toCSS: tree.toCSS,
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, index, currentFileInfo) {
this.index = index;
this.currentFileInfo = currentFileInfo;
var selectors = this.emptySelectors();
this.features = new(tree.Value)(features);
this.rules = [new(tree.Ruleset)(selectors, value)];
this.rules[0].allowImports = true;
};
tree.Media.prototype = {
type: "Media",
accept: function (visitor) {
this.features = visitor.visit(this.features);
this.rules = visitor.visit(this.rules);
},
genCSS: function (env, output) {
output.add('@media ', this.currentFileInfo, this.index);
this.features.genCSS(env, output);
tree.outputRuleset(env, output, this.rules);
},
toCSS: tree.toCSS,
eval: function (env) {
if (!env.mediaBlocks) {
env.mediaBlocks = [];
env.mediaPath = [];
}
var media = new(tree.Media)([], [], this.index, this.currentFileInfo);
if(this.debugInfo) {
this.rules[0].debugInfo = this.debugInfo;
media.debugInfo = this.debugInfo;
}
var strictMathBypass = false;
if (!env.strictMath) {
strictMathBypass = true;
env.strictMath = true;
}
try {
media.features = this.features.eval(env);
}
finally {
if (strictMathBypass) {
env.strictMath = false;
}
}
env.mediaPath.push(media);
env.mediaBlocks.push(media);
env.frames.unshift(this.rules[0]);
media.rules = [this.rules[0].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.rules[0], name); },
find: function () { return tree.Ruleset.prototype.find.apply(this.rules[0], arguments); },
rulesets: function () { return tree.Ruleset.prototype.rulesets.apply(this.rules[0]); },
emptySelectors: function() {
var el = new(tree.Element)('', '&', this.index, this.currentFileInfo);
return [new(tree.Selector)([el], null, null, this.index, this.currentFileInfo)];
},
markReferenced: function () {
var i, rules = this.rules[0].rules;
this.isReferenced = true;
for (i = 0; i < rules.length; i++) {
if (rules[i].markReferenced) {
rules[i].markReferenced();
}
}
},
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.rules = [new(tree.Ruleset)(selectors.slice(0), [this.rules[0]])];
}
};
})(require('../tree'));
(function (tree) {
tree.mixin = {};
tree.mixin.Call = function (elements, args, index, currentFileInfo, important) {
this.selector = new(tree.Selector)(elements);
this.arguments = args;
this.index = index;
this.currentFileInfo = currentFileInfo;
this.important = important;
};
tree.mixin.Call.prototype = {
type: "MixinCall",
accept: function (visitor) {
this.selector = visitor.visit(this.selector);
this.arguments = visitor.visit(this.arguments);
},
eval: function (env) {
var mixins, mixin, args, rules = [], match = false, i, m, f, isRecursive, isOneFound, rule;
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 {
if (!(mixin instanceof tree.mixin.Definition)) {
mixin = new tree.mixin.Definition("", [], mixin.rules, null, false);
mixin.originalRuleset = mixins[m].originalRuleset || mixins[m];
}
//if (this.important) {
// isImportant = env.isImportant;
// env.isImportant = true;
//}
Array.prototype.push.apply(
rules, mixin.eval(env, args, this.important).rules);
//if (this.important) {
// env.isImportant = isImportant;
//}
} catch (e) {
throw { message: e.message, index: this.index, filename: this.currentFileInfo.filename, stack: e.stack };
}
}
match = true;
}
}
if (match) {
if (!this.currentFileInfo || !this.currentFileInfo.reference) {
for (i = 0; i < rules.length; i++) {
rule = rules[i];
if (rule.markReferenced) {
rule.markReferenced();
}
}
}
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.currentFileInfo.filename };
} else {
throw { type: 'Name',
message: this.selector.toCSS().trim() + " is undefined",
index: this.index, filename: this.currentFileInfo.filename };
}
}
};
tree.mixin.Definition = function (name, params, rules, condition, variadic) {
this.name = name;
this.selectors = [new(tree.Selector)([new(tree.Element)(null, name, this.index, this.currentFileInfo)])];
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 = {
type: "MixinDefinition",
accept: function (visitor) {
this.params = visitor.visit(this.params);
this.rules = visitor.visit(this.rules);
this.condition = visitor.visit(this.condition);
},
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) {
/*jshint boss:true */
var frame = new(tree.Ruleset)(null, []),
varargs, arg,
params = this.params.slice(0),
i, j, val, name, isNamedFound, argIndex;
mixinEnv = new tree.evalEnv(mixinEnv, [frame].concat(mixinEnv.frames));
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);
frame.resetCache();
} 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, new(tree.evalEnv)(env, mixinFrames), args, _arguments),
rules, ruleset;
frame.rules.unshift(new(tree.Rule)('@arguments', new(tree.Expression)(_arguments).eval(env)));
rules = this.rules.slice(0);
ruleset = new(tree.Ruleset)(null, rules);
ruleset.originalRuleset = this;
ruleset = ruleset.eval(new(tree.evalEnv)(env, [this, frame].concat(mixinFrames)));
if (important) {
ruleset = this.parent.makeImportant.apply(ruleset);
}
return ruleset;
},
matchCondition: function (args, env) {
if (this.condition && !this.condition.eval(
new(tree.evalEnv)(env,
[this.evalParams(env, new(tree.evalEnv)(env, this.frames.concat(env.frames)), args, [])] // the parameter variables
.concat(this.frames) // the parent namespace/mixin frames
.concat(env.frames)))) { // the current environment frames
return false;
}
return true;
},
matchArgs: function (args, env) {
var argsLength = (args && args.length) || 0, len;
if (! this.variadic) {
if (argsLength < this.required) { return false; }
if (argsLength > this.params.length) { return false; }
} else {
if (argsLength < (this.required - 1)) { 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.Negative = function (node) {
this.value = node;
};
tree.Negative.prototype = {
type: "Negative",
accept: function (visitor) {
this.value = visitor.visit(this.value);
},
genCSS: function (env, output) {
output.add('-');
this.value.genCSS(env, output);
},
toCSS: tree.toCSS,
eval: function (env) {
if (env.isMathOn()) {
return (new(tree.Operation)('*', [new(tree.Dimension)(-1), this.value])).eval(env);
}
return new(tree.Negative)(this.value.eval(env));
}
};
})(require('../tree'));
(function (tree) {
tree.Operation = function (op, operands, isSpaced) {
this.op = op.trim();
this.operands = operands;
this.isSpaced = isSpaced;
};
tree.Operation.prototype = {
type: "Operation",
accept: function (visitor) {
this.operands = visitor.visit(this.operands);
},
eval: function (env) {
var a = this.operands[0].eval(env),
b = this.operands[1].eval(env),
temp;
if (env.isMathOn()) {
if (a instanceof tree.Dimension && b instanceof tree.Color) {
if (this.op === '*' || this.op === '+') {
temp = b, b = a, a = temp;
} else {
throw { type: "Operation",
message: "Can't substract or divide a color from a number" };
}
}
if (!a.operate) {
throw { type: "Operation",
message: "Operation on an invalid type" };
}
return a.operate(env, this.op, b);
} else {
return new(tree.Operation)(this.op, [a, b], this.isSpaced);
}
},
genCSS: function (env, output) {
this.operands[0].genCSS(env, output);
if (this.isSpaced) {
output.add(" ");
}
output.add(this.op);
if (this.isSpaced) {
output.add(" ");
}
this.operands[1].genCSS(env, output);
},
toCSS: tree.toCSS
};
tree.operate = function (env, 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 = {
type: "Paren",
accept: function (visitor) {
this.value = visitor.visit(this.value);
},
genCSS: function (env, output) {
output.add('(');
this.value.genCSS(env, output);
output.add(')');
},
toCSS: tree.toCSS,
eval: function (env) {
return new(tree.Paren)(this.value.eval(env));
}
};
})(require('../tree'));
(function (tree) {
tree.Quoted = function (str, content, escaped, index, currentFileInfo) {
this.escaped = escaped;
this.value = content || '';
this.quote = str.charAt(0);
this.index = index;
this.currentFileInfo = currentFileInfo;
};
tree.Quoted.prototype = {
type: "Quoted",
genCSS: function (env, output) {
if (!this.escaped) {
output.add(this.quote, this.currentFileInfo, this.index);
}
output.add(this.value);
if (!this.escaped) {
output.add(this.quote);
}
},
toCSS: tree.toCSS,
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, that.currentFileInfo).eval(env, true);
return (v instanceof tree.Quoted) ? v.value : v.toCSS();
});
return new(tree.Quoted)(this.quote + value + this.quote, value, this.escaped, this.index, this.currentFileInfo);
},
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.Rule = function (name, value, important, merge, index, currentFileInfo, inline) {
this.name = name;
this.value = (value instanceof tree.Value) ? value : new(tree.Value)([value]);
this.important = important ? ' ' + important.trim() : '';
this.merge = merge;
this.index = index;
this.currentFileInfo = currentFileInfo;
this.inline = inline || false;
this.variable = (name.charAt(0) === '@');
};
tree.Rule.prototype = {
type: "Rule",
accept: function (visitor) {
this.value = visitor.visit(this.value);
},
genCSS: function (env, output) {
output.add(this.name + (env.compress ? ':' : ': '), this.currentFileInfo, this.index);
try {
this.value.genCSS(env, output);
}
catch(e) {
e.index = this.index;
e.filename = this.currentFileInfo.filename;
throw e;
}
output.add(this.important + ((this.inline || (env.lastRule && env.compress)) ? "" : ";"), this.currentFileInfo, this.index);
},
toCSS: tree.toCSS,
eval: function (env) {
var strictMathBypass = false;
if (this.name === "font" && !env.strictMath) {
strictMathBypass = true;
env.strictMath = true;
}
try {
return new(tree.Rule)(this.name,
this.value.eval(env),
this.important,
this.merge,
this.index, this.currentFileInfo, this.inline);
}
finally {
if (strictMathBypass) {
env.strictMath = false;
}
}
},
makeImportant: function () {
return new(tree.Rule)(this.name,
this.value,
"!important",
this.merge,
this.index, this.currentFileInfo, this.inline);
}
};
})(require('../tree'));
(function (tree) {
tree.Ruleset = function (selectors, rules, strictImports) {
this.selectors = selectors;
this.rules = rules;
this._lookups = {};
this.strictImports = strictImports;
};
tree.Ruleset.prototype = {
type: "Ruleset",
accept: function (visitor) {
if (this.paths) {
for(var i = 0; i < this.paths.length; i++) {
this.paths[i] = visitor.visit(this.paths[i]);
}
} else {
this.selectors = visitor.visit(this.selectors);
}
this.rules = visitor.visit(this.rules);
},
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;
var rule;
var i;
ruleset.originalRuleset = this;
ruleset.root = this.root;
ruleset.firstRoot = this.firstRoot;
ruleset.allowImports = this.allowImports;
if(this.debugInfo) {
ruleset.debugInfo = this.debugInfo;
}
// push the current ruleset to the frames stack
env.frames.unshift(ruleset);
// currrent selectors
if (!env.selectors) {
env.selectors = [];
}
env.selectors.unshift(this.selectors);
// 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 (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 (i = 0; i < ruleset.rules.length; i++) {
if (ruleset.rules[i] instanceof tree.mixin.Call) {
/*jshint loopfunc:true */
rules = ruleset.rules[i].eval(env).filter(function(r) {
if ((r instanceof tree.Rule) && r.variable) {
// do not pollute the scope if the variable is
// already there. consider returning false here
// but we need a way to "return" variable from mixins
return !(ruleset.variable(r.name));
}
return true;
});
ruleset.rules.splice.apply(ruleset.rules, [i, 1].concat(rules));
i += rules.length-1;
ruleset.resetCache();
}
}
// Evaluate everything else
for (i = 0; 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();
env.selectors.shift();
if (env.mediaBlocks) {
for (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;
},
matchCondition: function (args, env) {
var lastSelector = this.selectors[this.selectors.length-1];
if (lastSelector.condition &&
!lastSelector.condition.eval(
new(tree.evalEnv)(env,
env.frames))) {
return false;
}
return true;
},
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 () {
return this.rules.filter(function (r) {
return (r instanceof tree.Ruleset) || (r instanceof tree.mixin.Definition);
});
},
find: function (selector, self) {
self = self || this;
var rules = [], 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;
},
genCSS: function (env, output) {
var i, j,
ruleNodes = [],
rulesetNodes = [],
debugInfo, // Line number debugging
rule,
firstRuleset = true,
path;
env.tabLevel = (env.tabLevel || 0);
if (!this.root) {
env.tabLevel++;
}
var tabRuleStr = env.compress ? '' : Array(env.tabLevel + 1).join(" "),
tabSetStr = env.compress ? '' : Array(env.tabLevel).join(" ");
for (i = 0; i < this.rules.length; i++) {
rule = this.rules[i];
if (rule.rules || (rule instanceof tree.Media) || rule instanceof tree.Directive || (this.root && rule instanceof tree.Comment)) {
rulesetNodes.push(rule);
} else {
ruleNodes.push(rule);
}
}
// If this is the root node, we don't render
// a selector, or {}.
if (!this.root) {
debugInfo = tree.debugInfo(env, this, tabSetStr);
if (debugInfo) {
output.add(debugInfo);
output.add(tabSetStr);
}
for(i = 0; i < this.paths.length; i++) {
path = this.paths[i];
env.firstSelector = true;
for(j = 0; j < path.length; j++) {
path[j].genCSS(env, output);
env.firstSelector = false;
}
if (i + 1 < this.paths.length) {
output.add(env.compress ? ',' : (',\n' + tabSetStr));
}
}
output.add((env.compress ? '{' : ' {\n') + tabRuleStr);
}
// Compile rules and rulesets
for (i = 0; i < ruleNodes.length; i++) {
rule = ruleNodes[i];
// @page{ directive ends up with root elements inside it, a mix of rules and rulesets
// In this instance we do not know whether it is the last property
if (i + 1 === ruleNodes.length && (!this.root || rulesetNodes.length === 0 || this.firstRoot)) {
env.lastRule = true;
}
if (rule.genCSS) {
rule.genCSS(env, output);
} else if (rule.value) {
output.add(rule.value.toString());
}
if (!env.lastRule) {
output.add(env.compress ? '' : ('\n' + tabRuleStr));
} else {
env.lastRule = false;
}
}
if (!this.root) {
output.add((env.compress ? '}' : '\n' + tabSetStr + '}'));
env.tabLevel--;
}
for (i = 0; i < rulesetNodes.length; i++) {
if (ruleNodes.length && firstRuleset) {
output.add((env.compress ? "" : "\n") + (this.root ? tabRuleStr : tabSetStr));
}
if (!firstRuleset) {
output.add((env.compress ? "" : "\n") + (this.root ? tabRuleStr : tabSetStr));
}
firstRuleset = false;
rulesetNodes[i].genCSS(env, output);
}
if (!output.isEmpty() && !env.compress && this.firstRoot) {
output.add('\n');
}
},
toCSS: tree.toCSS,
markReferenced: function () {
for (var s = 0; s < this.selectors.length; s++) {
this.selectors[s].markReferenced();
}
},
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, el.index, el.currentFileInfo));
}
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 = selector.createDerived(lastSelector.elements.slice(0));
newJoinedSelectorEmpty = false;
}
else {
newJoinedSelector = selector.createDerived([]);
}
//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, el.index, el.currentFileInfo));
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++) {
if (newSelectors[i].length > 0) {
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] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements));
}
else {
sel.push(new(tree.Selector)(elements));
}
}
}
};
})(require('../tree'));
(function (tree) {
tree.Selector = function (elements, extendList, condition, index, currentFileInfo, isReferenced) {
this.elements = elements;
this.extendList = extendList || [];
this.condition = condition;
this.currentFileInfo = currentFileInfo || {};
this.isReferenced = isReferenced;
if (!condition) {
this.evaldCondition = true;
}
};
tree.Selector.prototype = {
type: "Selector",
accept: function (visitor) {
this.elements = visitor.visit(this.elements);
this.extendList = visitor.visit(this.extendList);
this.condition = visitor.visit(this.condition);
},
createDerived: function(elements, extendList, evaldCondition) {
/*jshint eqnull:true */
evaldCondition = evaldCondition != null ? evaldCondition : this.evaldCondition;
var newSelector = new(tree.Selector)(elements, extendList || this.extendList, this.condition, this.index, this.currentFileInfo, this.isReferenced);
newSelector.evaldCondition = evaldCondition;
return newSelector;
},
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;
},
eval: function (env) {
var evaldCondition = this.condition && this.condition.eval(env);
return this.createDerived(this.elements.map(function (e) {
return e.eval(env);
}), this.extendList.map(function(extend) {
return extend.eval(env);
}), evaldCondition);
},
genCSS: function (env, output) {
var i, element;
if ((!env || !env.firstSelector) && this.elements[0].combinator.value === "") {
output.add(' ', this.currentFileInfo, this.index);
}
if (!this._css) {
//TODO caching? speed comparison?
for(i = 0; i < this.elements.length; i++) {
element = this.elements[i];
element.genCSS(env, output);
}
}
},
toCSS: tree.toCSS,
markReferenced: function () {
this.isReferenced = true;
},
getIsReferenced: function() {
return !this.currentFileInfo.reference || this.isReferenced;
},
getIsOutput: function() {
return this.evaldCondition;
}
};
})(require('../tree'));
(function (tree) {
tree.UnicodeDescriptor = function (value) {
this.value = value;
};
tree.UnicodeDescriptor.prototype = {
type: "UnicodeDescriptor",
genCSS: function (env, output) {
output.add(this.value);
},
toCSS: tree.toCSS,
eval: function () { return this; }
};
})(require('../tree'));
(function (tree) {
tree.URL = function (val, currentFileInfo) {
this.value = val;
this.currentFileInfo = currentFileInfo;
};
tree.URL.prototype = {
type: "Url",
accept: function (visitor) {
this.value = visitor.visit(this.value);
},
genCSS: function (env, output) {
output.add("url(");
this.value.genCSS(env, output);
output.add(")");
},
toCSS: tree.toCSS,
eval: function (ctx) {
var val = this.value.eval(ctx), rootpath;
// Add the base path if the URL is relative
rootpath = this.currentFileInfo && this.currentFileInfo.rootpath;
if (rootpath && typeof val.value === "string" && ctx.isPathRelative(val.value)) {
if (!val.quote) {
rootpath = rootpath.replace(/[\(\)'"\s]/g, function(match) { return "\\"+match; });
}
val.value = rootpath + val.value;
}
val.value = ctx.normalizePath(val.value);
return new(tree.URL)(val, null);
}
};
})(require('../tree'));
(function (tree) {
tree.Value = function (value) {
this.value = value;
};
tree.Value.prototype = {
type: "Value",
accept: function (visitor) {
this.value = visitor.visit(this.value);
},
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);
}));
}
},
genCSS: function (env, output) {
var i;
for(i = 0; i < this.value.length; i++) {
this.value[i].genCSS(env, output);
if (i+1 < this.value.length) {
output.add((env && env.compress) ? ',' : ', ');
}
}
},
toCSS: tree.toCSS
};
})(require('../tree'));
(function (tree) {
tree.Variable = function (name, index, currentFileInfo) {
this.name = name;
this.index = index;
this.currentFileInfo = currentFileInfo;
};
tree.Variable.prototype = {
type: "Variable",
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.currentFileInfo.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.currentFileInfo.filename,
index: this.index };
}
}
};
})(require('../tree'));
(function (tree) {
var parseCopyProperties = [
'paths', // option - unmodified - paths to search for imports on
'optimization', // option - optimization level (for the chunker)
'files', // list of files that have been imported, used for import-once
'contents', // browser-only, contents of all the files
'relativeUrls', // option - whether to adjust URL's to be relative
'rootpath', // option - rootpath to append to URL's
'strictImports', // option -
'insecure', // option - whether to allow imports from insecure ssl hosts
'dumpLineNumbers', // option - whether to dump line numbers
'compress', // option - whether to compress
'processImports', // option - whether to process imports. if false then imports will not be imported
'syncImport', // option - whether to import synchronously
'javascriptEnabled',// option - whether JavaScript is enabled. if undefined, defaults to true
'mime', // browser only - mime type for sheet import
'useFileCache', // browser only - whether to use the per file session cache
'currentFileInfo' // information about the current file - for error reporting and importing and making urls relative etc.
];
//currentFileInfo = {
// 'relativeUrls' - option - whether to adjust URL's to be relative
// 'filename' - full resolved filename of current file
// 'rootpath' - path to append to normal URLs for this node
// 'currentDirectory' - path to the current file, absolute
// 'rootFilename' - filename of the base file
// 'entryPath' - absolute path to the entry file
// 'reference' - whether the file should not be output and only output parts that are referenced
tree.parseEnv = function(options) {
copyFromOriginal(options, this, parseCopyProperties);
if (!this.contents) { this.contents = {}; }
if (!this.files) { this.files = {}; }
if (!this.currentFileInfo) {
var filename = (options && options.filename) || "input";
var entryPath = filename.replace(/[^\/\\]*$/, "");
if (options) {
options.filename = null;
}
this.currentFileInfo = {
filename: filename,
relativeUrls: this.relativeUrls,
rootpath: (options && options.rootpath) || "",
currentDirectory: entryPath,
entryPath: entryPath,
rootFilename: filename
};
}
};
var evalCopyProperties = [
'silent', // whether to swallow errors and warnings
'verbose', // whether to log more activity
'compress', // whether to compress
'yuicompress', // whether to compress with the outside tool yui compressor
'ieCompat', // whether to enforce IE compatibility (IE8 data-uri)
'strictMath', // whether math has to be within parenthesis
'strictUnits', // whether units need to evaluate correctly
'cleancss', // whether to compress with clean-css
'sourceMap', // whether to output a source map
'importMultiple'// whether we are currently importing multiple copies
];
tree.evalEnv = function(options, frames) {
copyFromOriginal(options, this, evalCopyProperties);
this.frames = frames || [];
};
tree.evalEnv.prototype.inParenthesis = function () {
if (!this.parensStack) {
this.parensStack = [];
}
this.parensStack.push(true);
};
tree.evalEnv.prototype.outOfParenthesis = function () {
this.parensStack.pop();
};
tree.evalEnv.prototype.isMathOn = function () {
return this.strictMath ? (this.parensStack && this.parensStack.length) : true;
};
tree.evalEnv.prototype.isPathRelative = function (path) {
return !/^(?:[a-z-]+:|\/)/.test(path);
};
tree.evalEnv.prototype.normalizePath = function( path ) {
var
segments = path.split("/").reverse(),
segment;
path = [];
while (segments.length !== 0 ) {
segment = segments.pop();
switch( segment ) {
case ".":
break;
case "..":
if ((path.length === 0) || (path[path.length - 1] === "..")) {
path.push( segment );
} else {
path.pop();
}
break;
default:
path.push( segment );
break;
}
}
return path.join("/");
};
//todo - do the same for the toCSS env
//tree.toCSSEnv = function (options) {
//};
var copyFromOriginal = function(original, destination, propertiesToCopy) {
if (!original) { return; }
for(var i = 0; i < propertiesToCopy.length; i++) {
if (original.hasOwnProperty(propertiesToCopy[i])) {
destination[propertiesToCopy[i]] = original[propertiesToCopy[i]];
}
}
};
})(require('./tree'));
(function (tree) {
tree.visitor = function(implementation) {
this._implementation = implementation;
};
tree.visitor.prototype = {
visit: function(node) {
if (node instanceof Array) {
return this.visitArray(node);
}
if (!node || !node.type) {
return node;
}
var funcName = "visit" + node.type,
func = this._implementation[funcName],
visitArgs, newNode;
if (func) {
visitArgs = {visitDeeper: true};
newNode = func.call(this._implementation, node, visitArgs);
if (this._implementation.isReplacing) {
node = newNode;
}
}
if ((!visitArgs || visitArgs.visitDeeper) && node && node.accept) {
node.accept(this);
}
funcName = funcName + "Out";
if (this._implementation[funcName]) {
this._implementation[funcName](node);
}
return node;
},
visitArray: function(nodes) {
var i, newNodes = [];
for(i = 0; i < nodes.length; i++) {
var evald = this.visit(nodes[i]);
if (evald instanceof Array) {
evald = this.flatten(evald);
newNodes = newNodes.concat(evald);
} else {
newNodes.push(evald);
}
}
if (this._implementation.isReplacing) {
return newNodes;
}
return nodes;
},
doAccept: function (node) {
node.accept(this);
},
flatten: function(arr, master) {
return arr.reduce(this.flattenReduce.bind(this), master || []);
},
flattenReduce: function(sum, element) {
if (element instanceof Array) {
sum = this.flatten(element, sum);
} else {
sum.push(element);
}
return sum;
}
};
})(require('./tree'));
(function (tree) {
tree.importVisitor = function(importer, finish, evalEnv) {
this._visitor = new tree.visitor(this);
this._importer = importer;
this._finish = finish;
this.env = evalEnv || new tree.evalEnv();
this.importCount = 0;
};
tree.importVisitor.prototype = {
isReplacing: true,
run: function (root) {
var error;
try {
// process the contents
this._visitor.visit(root);
}
catch(e) {
error = e;
}
this.isFinished = true;
if (this.importCount === 0) {
this._finish(error);
}
},
visitImport: function (importNode, visitArgs) {
var importVisitor = this,
evaldImportNode,
inlineCSS = importNode.options.inline;
if (!importNode.css || inlineCSS) {
try {
evaldImportNode = importNode.evalForImport(this.env);
} catch(e){
if (!e.filename) { e.index = importNode.index; e.filename = importNode.currentFileInfo.filename; }
// attempt to eval properly and treat as css
importNode.css = true;
// if that fails, this error will be thrown
importNode.error = e;
}
if (evaldImportNode && (!evaldImportNode.css || inlineCSS)) {
importNode = evaldImportNode;
this.importCount++;
var env = new tree.evalEnv(this.env, this.env.frames.slice(0));
if (importNode.options.multiple) {
env.importMultiple = true;
}
this._importer.push(importNode.getPath(), importNode.currentFileInfo, importNode.options, function (e, root, imported, fullPath) {
if (e && !e.filename) { e.index = importNode.index; e.filename = importNode.currentFileInfo.filename; }
if (imported && !env.importMultiple) { importNode.skip = imported; }
var subFinish = function(e) {
importVisitor.importCount--;
if (importVisitor.importCount === 0 && importVisitor.isFinished) {
importVisitor._finish(e);
}
};
if (root) {
importNode.root = root;
importNode.importedFilename = fullPath;
if (!inlineCSS && !importNode.skip) {
new(tree.importVisitor)(importVisitor._importer, subFinish, env)
.run(root);
return;
}
}
subFinish();
});
}
}
visitArgs.visitDeeper = false;
return importNode;
},
visitRule: function (ruleNode, visitArgs) {
visitArgs.visitDeeper = false;
return ruleNode;
},
visitDirective: function (directiveNode, visitArgs) {
this.env.frames.unshift(directiveNode);
return directiveNode;
},
visitDirectiveOut: function (directiveNode) {
this.env.frames.shift();
},
visitMixinDefinition: function (mixinDefinitionNode, visitArgs) {
this.env.frames.unshift(mixinDefinitionNode);
return mixinDefinitionNode;
},
visitMixinDefinitionOut: function (mixinDefinitionNode) {
this.env.frames.shift();
},
visitRuleset: function (rulesetNode, visitArgs) {
this.env.frames.unshift(rulesetNode);
return rulesetNode;
},
visitRulesetOut: function (rulesetNode) {
this.env.frames.shift();
},
visitMedia: function (mediaNode, visitArgs) {
this.env.frames.unshift(mediaNode.ruleset);
return mediaNode;
},
visitMediaOut: function (mediaNode) {
this.env.frames.shift();
}
};
})(require('./tree'));
(function (tree) {
tree.joinSelectorVisitor = function() {
this.contexts = [[]];
this._visitor = new tree.visitor(this);
};
tree.joinSelectorVisitor.prototype = {
run: function (root) {
return this._visitor.visit(root);
},
visitRule: function (ruleNode, visitArgs) {
visitArgs.visitDeeper = false;
},
visitMixinDefinition: function (mixinDefinitionNode, visitArgs) {
visitArgs.visitDeeper = false;
},
visitRuleset: function (rulesetNode, visitArgs) {
var context = this.contexts[this.contexts.length - 1];
var paths = [];
this.contexts.push(paths);
if (! rulesetNode.root) {
rulesetNode.selectors = rulesetNode.selectors.filter(function(selector) { return selector.getIsOutput(); });
if (rulesetNode.selectors.length === 0) {
rulesetNode.rules.length = 0;
}
rulesetNode.joinSelectors(paths, context, rulesetNode.selectors);
rulesetNode.paths = paths;
}
},
visitRulesetOut: function (rulesetNode) {
this.contexts.length = this.contexts.length - 1;
},
visitMedia: function (mediaNode, visitArgs) {
var context = this.contexts[this.contexts.length - 1];
mediaNode.rules[0].root = (context.length === 0 || context[0].multiMedia);
}
};
})(require('./tree'));
(function (tree) {
tree.toCSSVisitor = function(env) {
this._visitor = new tree.visitor(this);
this._env = env;
};
tree.toCSSVisitor.prototype = {
isReplacing: true,
run: function (root) {
return this._visitor.visit(root);
},
visitRule: function (ruleNode, visitArgs) {
if (ruleNode.variable) {
return [];
}
return ruleNode;
},
visitMixinDefinition: function (mixinNode, visitArgs) {
return [];
},
visitExtend: function (extendNode, visitArgs) {
return [];
},
visitComment: function (commentNode, visitArgs) {
if (commentNode.isSilent(this._env)) {
return [];
}
return commentNode;
},
visitMedia: function(mediaNode, visitArgs) {
mediaNode.accept(this._visitor);
visitArgs.visitDeeper = false;
if (!mediaNode.rules.length) {
return [];
}
return mediaNode;
},
visitDirective: function(directiveNode, visitArgs) {
if (directiveNode.currentFileInfo.reference && !directiveNode.isReferenced) {
return [];
}
if (directiveNode.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 (this.charset) {
if (directiveNode.debugInfo) {
var comment = new tree.Comment("/* " + directiveNode.toCSS(this._env).replace(/\n/g, "")+" */\n");
comment.debugInfo = directiveNode.debugInfo;
return this._visitor.visit(comment);
}
return [];
}
this.charset = true;
}
return directiveNode;
},
checkPropertiesInRoot: function(rules) {
var ruleNode;
for(var i = 0; i < rules.length; i++) {
ruleNode = rules[i];
if (ruleNode instanceof tree.Rule && !ruleNode.variable) {
throw { message: "properties must be inside selector blocks, they cannot be in the root.",
index: ruleNode.index, filename: ruleNode.currentFileInfo ? ruleNode.currentFileInfo.filename : null};
}
}
},
visitRuleset: function (rulesetNode, visitArgs) {
var rule, rulesets = [];
if (rulesetNode.firstRoot) {
this.checkPropertiesInRoot(rulesetNode.rules);
}
if (! rulesetNode.root) {
rulesetNode.paths = rulesetNode.paths
.filter(function(p) {
var i;
if (p[0].elements[0].combinator.value === ' ') {
p[0].elements[0].combinator = new(tree.Combinator)('');
}
for(i = 0; i < p.length; i++) {
if (p[i].getIsReferenced() && p[i].getIsOutput()) {
return true;
}
return false;
}
});
// Compile rules and rulesets
for (var i = 0; i < rulesetNode.rules.length; i++) {
rule = rulesetNode.rules[i];
if (rule.rules) {
// visit because we are moving them out from being a child
rulesets.push(this._visitor.visit(rule));
rulesetNode.rules.splice(i, 1);
i--;
continue;
}
}
// accept the visitor to remove rules and refactor itself
// then we can decide now whether we want it or not
if (rulesetNode.rules.length > 0) {
rulesetNode.accept(this._visitor);
}
visitArgs.visitDeeper = false;
this._mergeRules(rulesetNode.rules);
this._removeDuplicateRules(rulesetNode.rules);
// now decide whether we keep the ruleset
if (rulesetNode.rules.length > 0 && rulesetNode.paths.length > 0) {
rulesets.splice(0, 0, rulesetNode);
}
} else {
rulesetNode.accept(this._visitor);
visitArgs.visitDeeper = false;
if (rulesetNode.firstRoot || rulesetNode.rules.length > 0) {
rulesets.splice(0, 0, rulesetNode);
}
}
if (rulesets.length === 1) {
return rulesets[0];
}
return rulesets;
},
_removeDuplicateRules: function(rules) {
// remove duplicates
var ruleCache = {},
ruleList, rule, i;
for(i = rules.length - 1; i >= 0 ; i--) {
rule = rules[i];
if (rule instanceof tree.Rule) {
if (!ruleCache[rule.name]) {
ruleCache[rule.name] = rule;
} else {
ruleList = ruleCache[rule.name];
if (ruleList instanceof tree.Rule) {
ruleList = ruleCache[rule.name] = [ruleCache[rule.name].toCSS(this._env)];
}
var ruleCSS = rule.toCSS(this._env);
if (ruleList.indexOf(ruleCSS) !== -1) {
rules.splice(i, 1);
} else {
ruleList.push(ruleCSS);
}
}
}
}
},
_mergeRules: function (rules) {
var groups = {},
parts,
rule,
key;
for (var i = 0; i < rules.length; i++) {
rule = rules[i];
if ((rule instanceof tree.Rule) && rule.merge) {
key = [rule.name,
rule.important ? "!" : ""].join(",");
if (!groups[key]) {
parts = groups[key] = [];
} else {
rules.splice(i--, 1);
}
parts.push(rule);
}
}
Object.keys(groups).map(function (k) {
parts = groups[k];
if (parts.length > 1) {
rule = parts[0];
rule.value = new (tree.Value)(parts.map(function (p) {
return p.value;
}));
}
});
}
};
})(require('./tree'));
(function (tree) {
/*jshint loopfunc:true */
tree.extendFinderVisitor = function() {
this._visitor = new tree.visitor(this);
this.contexts = [];
this.allExtendsStack = [[]];
};
tree.extendFinderVisitor.prototype = {
run: function (root) {
root = this._visitor.visit(root);
root.allExtends = this.allExtendsStack[0];
return root;
},
visitRule: function (ruleNode, visitArgs) {
visitArgs.visitDeeper = false;
},
visitMixinDefinition: function (mixinDefinitionNode, visitArgs) {
visitArgs.visitDeeper = false;
},
visitRuleset: function (rulesetNode, visitArgs) {
if (rulesetNode.root) {
return;
}
var i, j, extend, allSelectorsExtendList = [], extendList;
// get &:extend(.a); rules which apply to all selectors in this ruleset
for(i = 0; i < rulesetNode.rules.length; i++) {
if (rulesetNode.rules[i] instanceof tree.Extend) {
allSelectorsExtendList.push(rulesetNode.rules[i]);
rulesetNode.extendOnEveryPath = true;
}
}
// now find every selector and apply the extends that apply to all extends
// and the ones which apply to an individual extend
for(i = 0; i < rulesetNode.paths.length; i++) {
var selectorPath = rulesetNode.paths[i],
selector = selectorPath[selectorPath.length-1];
extendList = selector.extendList.slice(0).concat(allSelectorsExtendList).map(function(allSelectorsExtend) {
return allSelectorsExtend.clone();
});
for(j = 0; j < extendList.length; j++) {
this.foundExtends = true;
extend = extendList[j];
extend.findSelfSelectors(selectorPath);
extend.ruleset = rulesetNode;
if (j === 0) { extend.firstExtendOnThisSelectorPath = true; }
this.allExtendsStack[this.allExtendsStack.length-1].push(extend);
}
}
this.contexts.push(rulesetNode.selectors);
},
visitRulesetOut: function (rulesetNode) {
if (!rulesetNode.root) {
this.contexts.length = this.contexts.length - 1;
}
},
visitMedia: function (mediaNode, visitArgs) {
mediaNode.allExtends = [];
this.allExtendsStack.push(mediaNode.allExtends);
},
visitMediaOut: function (mediaNode) {
this.allExtendsStack.length = this.allExtendsStack.length - 1;
},
visitDirective: function (directiveNode, visitArgs) {
directiveNode.allExtends = [];
this.allExtendsStack.push(directiveNode.allExtends);
},
visitDirectiveOut: function (directiveNode) {
this.allExtendsStack.length = this.allExtendsStack.length - 1;
}
};
tree.processExtendsVisitor = function() {
this._visitor = new tree.visitor(this);
};
tree.processExtendsVisitor.prototype = {
run: function(root) {
var extendFinder = new tree.extendFinderVisitor();
extendFinder.run(root);
if (!extendFinder.foundExtends) { return root; }
root.allExtends = root.allExtends.concat(this.doExtendChaining(root.allExtends, root.allExtends));
this.allExtendsStack = [root.allExtends];
return this._visitor.visit(root);
},
doExtendChaining: function (extendsList, extendsListTarget, iterationCount) {
//
// chaining is different from normal extension.. if we extend an extend then we are not just copying, altering and pasting
// the selector we would do normally, but we are also adding an extend with the same target selector
// this means this new extend can then go and alter other extends
//
// this method deals with all the chaining work - without it, extend is flat and doesn't work on other extend selectors
// this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already processed if
// we look at each selector at a time, as is done in visitRuleset
var extendIndex, targetExtendIndex, matches, extendsToAdd = [], newSelector, extendVisitor = this, selectorPath, extend, targetExtend, newExtend;
iterationCount = iterationCount || 0;
//loop through comparing every extend with every target extend.
// a target extend is the one on the ruleset we are looking at copy/edit/pasting in place
// e.g. .a:extend(.b) {} and .b:extend(.c) {} then the first extend extends the second one
// and the second is the target.
// the seperation into two lists allows us to process a subset of chains with a bigger set, as is the
// case when processing media queries
for(extendIndex = 0; extendIndex < extendsList.length; extendIndex++){
for(targetExtendIndex = 0; targetExtendIndex < extendsListTarget.length; targetExtendIndex++){
extend = extendsList[extendIndex];
targetExtend = extendsListTarget[targetExtendIndex];
// look for circular references
if (this.inInheritanceChain(targetExtend, extend)) { continue; }
// find a match in the target extends self selector (the bit before :extend)
selectorPath = [targetExtend.selfSelectors[0]];
matches = extendVisitor.findMatch(extend, selectorPath);
if (matches.length) {
// we found a match, so for each self selector..
extend.selfSelectors.forEach(function(selfSelector) {
// process the extend as usual
newSelector = extendVisitor.extendSelector(matches, selectorPath, selfSelector);
// but now we create a new extend from it
newExtend = new(tree.Extend)(targetExtend.selector, targetExtend.option, 0);
newExtend.selfSelectors = newSelector;
// add the extend onto the list of extends for that selector
newSelector[newSelector.length-1].extendList = [newExtend];
// record that we need to add it.
extendsToAdd.push(newExtend);
newExtend.ruleset = targetExtend.ruleset;
//remember its parents for circular references
newExtend.parents = [targetExtend, extend];
// only process the selector once.. if we have :extend(.a,.b) then multiple
// extends will look at the same selector path, so when extending
// we know that any others will be duplicates in terms of what is added to the css
if (targetExtend.firstExtendOnThisSelectorPath) {
newExtend.firstExtendOnThisSelectorPath = true;
targetExtend.ruleset.paths.push(newSelector);
}
});
}
}
}
if (extendsToAdd.length) {
// try to detect circular references to stop a stack overflow.
// may no longer be needed.
this.extendChainCount++;
if (iterationCount > 100) {
var selectorOne = "{unable to calculate}";
var selectorTwo = "{unable to calculate}";
try
{
selectorOne = extendsToAdd[0].selfSelectors[0].toCSS();
selectorTwo = extendsToAdd[0].selector.toCSS();
}
catch(e) {}
throw {message: "extend circular reference detected. One of the circular extends is currently:"+selectorOne+":extend(" + selectorTwo+")"};
}
// now process the new extends on the existing rules so that we can handle a extending b extending c ectending d extending e...
return extendsToAdd.concat(extendVisitor.doExtendChaining(extendsToAdd, extendsListTarget, iterationCount+1));
} else {
return extendsToAdd;
}
},
inInheritanceChain: function (possibleParent, possibleChild) {
if (possibleParent === possibleChild) {
return true;
}
if (possibleChild.parents) {
if (this.inInheritanceChain(possibleParent, possibleChild.parents[0])) {
return true;
}
if (this.inInheritanceChain(possibleParent, possibleChild.parents[1])) {
return true;
}
}
return false;
},
visitRule: function (ruleNode, visitArgs) {
visitArgs.visitDeeper = false;
},
visitMixinDefinition: function (mixinDefinitionNode, visitArgs) {
visitArgs.visitDeeper = false;
},
visitSelector: function (selectorNode, visitArgs) {
visitArgs.visitDeeper = false;
},
visitRuleset: function (rulesetNode, visitArgs) {
if (rulesetNode.root) {
return;
}
var matches, pathIndex, extendIndex, allExtends = this.allExtendsStack[this.allExtendsStack.length-1], selectorsToAdd = [], extendVisitor = this, selectorPath;
// look at each selector path in the ruleset, find any extend matches and then copy, find and replace
for(extendIndex = 0; extendIndex < allExtends.length; extendIndex++) {
for(pathIndex = 0; pathIndex < rulesetNode.paths.length; pathIndex++) {
selectorPath = rulesetNode.paths[pathIndex];
// extending extends happens initially, before the main pass
if (rulesetNode.extendOnEveryPath || selectorPath[selectorPath.length-1].extendList.length) { continue; }
matches = this.findMatch(allExtends[extendIndex], selectorPath);
if (matches.length) {
allExtends[extendIndex].selfSelectors.forEach(function(selfSelector) {
selectorsToAdd.push(extendVisitor.extendSelector(matches, selectorPath, selfSelector));
});
}
}
}
rulesetNode.paths = rulesetNode.paths.concat(selectorsToAdd);
},
findMatch: function (extend, haystackSelectorPath) {
//
// look through the haystack selector path to try and find the needle - extend.selector
// returns an array of selector matches that can then be replaced
//
var haystackSelectorIndex, hackstackSelector, hackstackElementIndex, haystackElement,
targetCombinator, i,
extendVisitor = this,
needleElements = extend.selector.elements,
potentialMatches = [], potentialMatch, matches = [];
// loop through the haystack elements
for(haystackSelectorIndex = 0; haystackSelectorIndex < haystackSelectorPath.length; haystackSelectorIndex++) {
hackstackSelector = haystackSelectorPath[haystackSelectorIndex];
for(hackstackElementIndex = 0; hackstackElementIndex < hackstackSelector.elements.length; hackstackElementIndex++) {
haystackElement = hackstackSelector.elements[hackstackElementIndex];
// if we allow elements before our match we can add a potential match every time. otherwise only at the first element.
if (extend.allowBefore || (haystackSelectorIndex === 0 && hackstackElementIndex === 0)) {
potentialMatches.push({pathIndex: haystackSelectorIndex, index: hackstackElementIndex, matched: 0, initialCombinator: haystackElement.combinator});
}
for(i = 0; i < potentialMatches.length; i++) {
potentialMatch = potentialMatches[i];
// selectors add " " onto the first element. When we use & it joins the selectors together, but if we don't
// then each selector in haystackSelectorPath has a space before it added in the toCSS phase. so we need to work out
// what the resulting combinator will be
targetCombinator = haystackElement.combinator.value;
if (targetCombinator === '' && hackstackElementIndex === 0) {
targetCombinator = ' ';
}
// if we don't match, null our match to indicate failure
if (!extendVisitor.isElementValuesEqual(needleElements[potentialMatch.matched].value, haystackElement.value) ||
(potentialMatch.matched > 0 && needleElements[potentialMatch.matched].combinator.value !== targetCombinator)) {
potentialMatch = null;
} else {
potentialMatch.matched++;
}
// if we are still valid and have finished, test whether we have elements after and whether these are allowed
if (potentialMatch) {
potentialMatch.finished = potentialMatch.matched === needleElements.length;
if (potentialMatch.finished &&
(!extend.allowAfter && (hackstackElementIndex+1 < hackstackSelector.elements.length || haystackSelectorIndex+1 < haystackSelectorPath.length))) {
potentialMatch = null;
}
}
// if null we remove, if not, we are still valid, so either push as a valid match or continue
if (potentialMatch) {
if (potentialMatch.finished) {
potentialMatch.length = needleElements.length;
potentialMatch.endPathIndex = haystackSelectorIndex;
potentialMatch.endPathElementIndex = hackstackElementIndex + 1; // index after end of match
potentialMatches.length = 0; // we don't allow matches to overlap, so start matching again
matches.push(potentialMatch);
}
} else {
potentialMatches.splice(i, 1);
i--;
}
}
}
}
return matches;
},
isElementValuesEqual: function(elementValue1, elementValue2) {
if (typeof elementValue1 === "string" || typeof elementValue2 === "string") {
return elementValue1 === elementValue2;
}
if (elementValue1 instanceof tree.Attribute) {
if (elementValue1.op !== elementValue2.op || elementValue1.key !== elementValue2.key) {
return false;
}
if (!elementValue1.value || !elementValue2.value) {
if (elementValue1.value || elementValue2.value) {
return false;
}
return true;
}
elementValue1 = elementValue1.value.value || elementValue1.value;
elementValue2 = elementValue2.value.value || elementValue2.value;
return elementValue1 === elementValue2;
}
elementValue1 = elementValue1.value;
elementValue2 = elementValue2.value;
if (elementValue1 instanceof tree.Selector) {
if (!(elementValue2 instanceof tree.Selector) || elementValue1.elements.length !== elementValue2.elements.length) {
return false;
}
for(var i = 0; i <elementValue1.elements.length; i++) {
if (elementValue1.elements[i].combinator.value !== elementValue2.elements[i].combinator.value) {
if (i !== 0 || (elementValue1.elements[i].combinator.value || ' ') !== (elementValue2.elements[i].combinator.value || ' ')) {
return false;
}
}
if (!this.isElementValuesEqual(elementValue1.elements[i].value, elementValue2.elements[i].value)) {
return false;
}
}
return true;
}
return false;
},
extendSelector:function (matches, selectorPath, replacementSelector) {
//for a set of matches, replace each match with the replacement selector
var currentSelectorPathIndex = 0,
currentSelectorPathElementIndex = 0,
path = [],
matchIndex,
selector,
firstElement,
match,
newElements;
for (matchIndex = 0; matchIndex < matches.length; matchIndex++) {
match = matches[matchIndex];
selector = selectorPath[match.pathIndex];
firstElement = new tree.Element(
match.initialCombinator,
replacementSelector.elements[0].value,
replacementSelector.elements[0].index,
replacementSelector.elements[0].currentFileInfo
);
if (match.pathIndex > currentSelectorPathIndex && currentSelectorPathElementIndex > 0) {
path[path.length - 1].elements = path[path.length - 1].elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));
currentSelectorPathElementIndex = 0;
currentSelectorPathIndex++;
}
newElements = selector.elements
.slice(currentSelectorPathElementIndex, match.index)
.concat([firstElement])
.concat(replacementSelector.elements.slice(1));
if (currentSelectorPathIndex === match.pathIndex && matchIndex > 0) {
path[path.length - 1].elements =
path[path.length - 1].elements.concat(newElements);
} else {
path = path.concat(selectorPath.slice(currentSelectorPathIndex, match.pathIndex));
path.push(new tree.Selector(
newElements
));
}
currentSelectorPathIndex = match.endPathIndex;
currentSelectorPathElementIndex = match.endPathElementIndex;
if (currentSelectorPathElementIndex >= selectorPath[currentSelectorPathIndex].elements.length) {
currentSelectorPathElementIndex = 0;
currentSelectorPathIndex++;
}
}
if (currentSelectorPathIndex < selectorPath.length && currentSelectorPathElementIndex > 0) {
path[path.length - 1].elements = path[path.length - 1].elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));
currentSelectorPathIndex++;
}
path = path.concat(selectorPath.slice(currentSelectorPathIndex, selectorPath.length));
return path;
},
visitRulesetOut: function (rulesetNode) {
},
visitMedia: function (mediaNode, visitArgs) {
var newAllExtends = mediaNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length-1]);
newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, mediaNode.allExtends));
this.allExtendsStack.push(newAllExtends);
},
visitMediaOut: function (mediaNode) {
this.allExtendsStack.length = this.allExtendsStack.length - 1;
},
visitDirective: function (directiveNode, visitArgs) {
var newAllExtends = directiveNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length-1]);
newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, directiveNode.allExtends));
this.allExtendsStack.push(newAllExtends);
},
visitDirectiveOut: function (directiveNode) {
this.allExtendsStack.length = this.allExtendsStack.length - 1;
}
};
})(require('./tree'));
(function (tree) {
tree.sourceMapOutput = function (options) {
this._css = [];
this._rootNode = options.rootNode;
this._writeSourceMap = options.writeSourceMap;
this._contentsMap = options.contentsMap;
this._sourceMapFilename = options.sourceMapFilename;
this._outputFilename = options.outputFilename;
this._sourceMapBasepath = options.sourceMapBasepath;
this._sourceMapRootpath = options.sourceMapRootpath;
this._outputSourceFiles = options.outputSourceFiles;
this._sourceMapGeneratorConstructor = options.sourceMapGenerator || require("source-map").SourceMapGenerator;
if (this._sourceMapRootpath && this._sourceMapRootpath.charAt(this._sourceMapRootpath.length-1) !== '/') {
this._sourceMapRootpath += '/';
}
this._lineNumber = 0;
this._column = 0;
};
tree.sourceMapOutput.prototype.normalizeFilename = function(filename) {
if (this._sourceMapBasepath && filename.indexOf(this._sourceMapBasepath) === 0) {
filename = filename.substring(this._sourceMapBasepath.length);
if (filename.charAt(0) === '\\' || filename.charAt(0) === '/') {
filename = filename.substring(1);
}
}
return (this._sourceMapRootpath || "") + filename.replace(/\\/g, '/');
};
tree.sourceMapOutput.prototype.add = function(chunk, fileInfo, index, mapLines) {
//ignore adding empty strings
if (!chunk) {
return;
}
var lines,
sourceLines,
columns,
sourceColumns,
i;
if (fileInfo) {
var inputSource = this._contentsMap[fileInfo.filename].substring(0, index);
sourceLines = inputSource.split("\n");
sourceColumns = sourceLines[sourceLines.length-1];
}
lines = chunk.split("\n");
columns = lines[lines.length-1];
if (fileInfo) {
if (!mapLines) {
this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + 1, column: this._column},
original: { line: sourceLines.length, column: sourceColumns.length},
source: this.normalizeFilename(fileInfo.filename)});
} else {
for(i = 0; i < lines.length; i++) {
this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + i + 1, column: i === 0 ? this._column : 0},
original: { line: sourceLines.length + i, column: i === 0 ? sourceColumns.length : 0},
source: this.normalizeFilename(fileInfo.filename)});
}
}
}
if (lines.length === 1) {
this._column += columns.length;
} else {
this._lineNumber += lines.length - 1;
this._column = columns.length;
}
this._css.push(chunk);
};
tree.sourceMapOutput.prototype.isEmpty = function() {
return this._css.length === 0;
};
tree.sourceMapOutput.prototype.toCSS = function(env) {
this._sourceMapGenerator = new this._sourceMapGeneratorConstructor({ file: this._outputFilename, sourceRoot: null });
if (this._outputSourceFiles) {
for(var filename in this._contentsMap) {
this._sourceMapGenerator.setSourceContent(this.normalizeFilename(filename), this._contentsMap[filename]);
}
}
this._rootNode.genCSS(env, this);
if (this._css.length > 0) {
var sourceMapFilename,
sourceMapContent = JSON.stringify(this._sourceMapGenerator.toJSON());
if (this._sourceMapFilename) {
sourceMapFilename = this.normalizeFilename(this._sourceMapFilename);
}
if (this._writeSourceMap) {
this._writeSourceMap(sourceMapContent);
} else {
sourceMapFilename = "data:application/json," + encodeURIComponent(sourceMapContent);
}
if (sourceMapFilename) {
this._css.push("/*# sourceMappingURL=" + sourceMapFilename + " */");
}
}
return this._css.join('');
};
})(require('./tree'));
//
// browser.js - client-side engine
//
/*global less, window, document, XMLHttpRequest, location */
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');
var logLevel = {
info: 2,
errors: 1,
none: 0
};
// The amount of logging in the javascript console.
// 2 - Information and errors
// 1 - Errors
// 0 - None
// Defaults to 2
less.logLevel = typeof(less.logLevel) != 'undefined' ? less.logLevel : logLevel.info;
// 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];
}
var typePattern = /^text\/(x-)?less$/;
var cache = null;
var fileCache = {};
function log(str, level) {
if (less.env == 'development' && typeof(console) !== 'undefined' && less.logLevel >= level) {
console.log('less: ' + str);
}
}
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 errorConsole(e, rootHref) {
var template = '{line} {content}';
var filename = e.filename || rootHref;
var errors = [];
var content = (e.type || "Syntax") + "Error: " + (e.message || 'There is an error in your .less file') +
" in " + filename + " ";
var errorline = function (e, i, classname) {
if (e.extract[i] !== undefined) {
errors.push(template.replace(/\{line\}/, (parseInt(e.line, 10) || 0) + (i - 1))
.replace(/\{class\}/, classname)
.replace(/\{content\}/, e.extract[i]));
}
};
if (e.extract) {
errorline(e, 0, '');
errorline(e, 1, 'line');
errorline(e, 2, '');
content += 'on line ' + e.line + ', column ' + (e.column + 1) + ':\n' +
errors.join('\n');
} else if (e.stack) {
content += e.stack;
}
log(content, logLevel.errors);
}
function createCSS(styles, sheet, lastModified) {
// 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 this has already been inserted into the DOM, we may need to replace it
var oldCss = document.getElementById(id);
var keepOldCss = false;
// Create a new stylesheet node for insertion or (if necessary) replacement
var css = document.createElement('style');
css.setAttribute('type', 'text/css');
if (sheet.media) {
css.setAttribute('media', sheet.media);
}
css.id = id;
if (css.styleSheet) { // IE
try {
css.styleSheet.cssText = styles;
} catch (e) {
throw new(Error)("Couldn't reassign styleSheet.cssText.");
}
} else {
css.appendChild(document.createTextNode(styles));
// If new contents match contents of oldCss, don't replace oldCss
keepOldCss = (oldCss !== null && oldCss.childNodes.length > 0 && css.childNodes.length > 0 &&
oldCss.firstChild.nodeValue === css.firstChild.nodeValue);
}
var head = document.getElementsByTagName('head')[0];
// If there is no oldCss, just append; otherwise, only append if we need
// to replace oldCss with an updated stylesheet
if (oldCss === null || keepOldCss === false) {
var nextEl = sheet && sheet.nextSibling || null;
if (nextEl) {
nextEl.parentNode.insertBefore(css, nextEl);
} else {
head.appendChild(css);
}
}
if (oldCss && keepOldCss === false) {
oldCss.parentNode.removeChild(oldCss);
}
// Don't update the local store if the file wasn't modified
if (lastModified && cache) {
log('saving ' + href + ' to cache.', logLevel.info);
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', logLevel.errors);
}
}
}
function errorHTML(e, rootHref) {
var id = 'less-error-message:' + extractId(rootHref || "");
var template = '<li><label>{line}</label><pre class="{class}">{content}</pre></li>';
var elem = document.createElement('div'), timer, content, errors = [];
var filename = e.filename || rootHref;
var filenameNoPath = filename.match(/([^\/]+(\?.*)?)$/)[1];
elem.id = id;
elem.className = "less-error-message";
content = '<h3>' + (e.type || "Syntax") + "Error: " + (e.message || 'There is an error in your .less file') +
'</h3>' + '<p>in <a href="' + filename + '">' + filenameNoPath + "</a> ";
var errorline = function (e, i, classname) {
if (e.extract[i] !== undefined) {
errors.push(template.replace(/\{line\}/, (parseInt(e.line, 10) || 0) + (i - 1))
.replace(/\{class\}/, classname)
.replace(/\{content\}/, e.extract[i]));
}
};
if (e.extract) {
errorline(e, 0, '');
errorline(e, 1, 'line');
errorline(e, 2, '');
content += 'on line ' + e.line + ', column ' + (e.column + 1) + ':</p>' +
'<ul>' + errors.join('') + '</ul>';
} else if (e.stack) {
content += '<br/>' + e.stack.split('\n').slice(1).join('<br/>');
}
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);
}
}
function error(e, rootHref) {
if (!less.errorReporting || less.errorReporting === "html") {
errorHTML(e, rootHref);
} else if (less.errorReporting === "console") {
errorConsole(e, rootHref);
} else if (typeof less.errorReporting === 'function') {
less.errorReporting("add", e, rootHref);
}
}
function removeErrorHTML(path) {
var node = document.getElementById('less-error-message:' + extractId(path));
if (node) {
node.parentNode.removeChild(node);
}
}
function removeErrorConsole(path) {
//no action
}
function removeError(path) {
if (!less.errorReporting || less.errorReporting === "html") {
removeErrorHTML(path);
} else if (less.errorReporting === "console") {
removeErrorConsole(path);
} else if (typeof less.errorReporting === 'function') {
less.errorReporting("remove", path);
}
}
function loadStyles(newVars) {
var styles = document.getElementsByTagName('style'),
style;
for (var i = 0; i < styles.length; i++) {
style = styles[i];
if (style.type.match(typePattern)) {
var env = new less.tree.parseEnv(less),
lessText = style.innerHTML || '';
env.filename = document.location.href.replace(/#.*$/, '');
if (newVars) {
env.useFileCache = true;
lessText += "\n" + newVars;
}
/*jshint loopfunc:true */
// use closure to store current value of i
var callback = (function(style) {
return function (e, cssAST) {
if (e) {
return error(e, "inline");
}
var css = cssAST.toCSS(less);
style.type = 'text/css';
if (style.styleSheet) {
style.styleSheet.cssText = css;
} else {
style.innerHTML = css;
}
};
})(style);
new(less.Parser)(env).parse(lessText, callback);
}
}
}
function extractUrlParts(url, baseUrl) {
// urlParts[1] = protocol&hostname || /
// urlParts[2] = / if path relative to host base
// urlParts[3] = directories
// urlParts[4] = filename
// urlParts[5] = parameters
var urlPartsRegex = /^((?:[a-z-]+:)?\/+?(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i,
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] = urlParts[1] || baseUrlParts[1] || "";
if (!urlParts[2]) {
urlParts[3] = baseUrlParts[3] + urlParts[3];
}
}
if (urlParts[3]) {
directories = urlParts[3].replace(/\\/g, "/").split("/");
// extract out . before .. so .. doesn't absorb a non-directory
for(i = 0; i < directories.length; i++) {
if (directories[i] === ".") {
directories.splice(i, 1);
i -= 1;
}
}
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 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 getXMLHttpRequest() {
if (window.XMLHttpRequest) {
return new XMLHttpRequest();
} else {
try {
/*global ActiveXObject */
return new ActiveXObject("MSXML2.XMLHTTP.3.0");
} catch (e) {
log("browser doesn't support AJAX.", logLevel.errors);
return null;
}
}
}
function doXHR(url, type, callback, errback) {
var xhr = getXMLHttpRequest();
var async = isFileProtocol ? less.fileAsync : less.async;
if (typeof(xhr.overrideMimeType) === 'function') {
xhr.overrideMimeType('text/css');
}
log("XHR: Getting '" + url + "'", logLevel.info);
xhr.open('GET', url, async);
xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5');
xhr.send(null);
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);
}
}
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 loadFile(originalHref, currentFileInfo, callback, env, newVars) {
if (currentFileInfo && currentFileInfo.currentDirectory && !/^([a-z-]+:)?\//.test(originalHref)) {
originalHref = currentFileInfo.currentDirectory + originalHref;
}
// sheet may be set to the stylesheet for the initial load or a collection of properties including
// some env variables for imports
var hrefParts = extractUrlParts(originalHref, window.location.href);
var href = hrefParts.url;
var newFileInfo = {
currentDirectory: hrefParts.path,
filename: href
};
if (currentFileInfo) {
newFileInfo.entryPath = currentFileInfo.entryPath;
newFileInfo.rootpath = currentFileInfo.rootpath;
newFileInfo.rootFilename = currentFileInfo.rootFilename;
newFileInfo.relativeUrls = currentFileInfo.relativeUrls;
} else {
newFileInfo.entryPath = hrefParts.path;
newFileInfo.rootpath = less.rootpath || hrefParts.path;
newFileInfo.rootFilename = href;
newFileInfo.relativeUrls = env.relativeUrls;
}
if (newFileInfo.relativeUrls) {
if (env.rootpath) {
newFileInfo.rootpath = extractUrlParts(env.rootpath + pathDiff(hrefParts.path, newFileInfo.entryPath)).path;
} else {
newFileInfo.rootpath = hrefParts.path;
}
}
if (env.useFileCache && fileCache[href]) {
try {
var lessText = fileCache[href];
if (newVars) {
lessText += "\n" + newVars;
}
callback(null, lessText, href, newFileInfo, { lastModified: new Date() });
} catch (e) {
callback(e, null, href);
}
return;
}
doXHR(href, env.mime, function (data, lastModified) {
// per file cache
fileCache[href] = data;
// Use remote copy (re-parse)
try {
callback(null, data, href, newFileInfo, { lastModified: lastModified });
} catch (e) {
callback(e, null, href);
}
}, function (status, url) {
callback({ type: 'File', message: "'" + url + "' wasn't found (" + status + ")" }, null, href);
});
}
function loadStyleSheet(sheet, callback, reload, remaining, newVars) {
var env = new less.tree.parseEnv(less);
env.mime = sheet.type;
if (newVars) {
env.useFileCache = true;
}
loadFile(sheet.href, null, function(e, data, path, newFileInfo, webInfo) {
if (webInfo) {
webInfo.remaining = remaining;
var css = cache && cache.getItem(path),
timestamp = cache && cache.getItem(path + ':timestamp');
if (!reload && timestamp && webInfo.lastModified &&
(new(Date)(webInfo.lastModified).valueOf() ===
new(Date)(timestamp).valueOf())) {
// Use local copy
createCSS(css, sheet);
webInfo.local = true;
callback(null, null, data, sheet, webInfo, path);
return;
}
}
//TODO add tests around how this behaves when reloading
removeError(path);
if (data) {
env.currentFileInfo = newFileInfo;
new(less.Parser)(env).parse(data, function (e, root) {
if (e) { return callback(e, null, null, sheet); }
try {
callback(e, root, data, sheet, webInfo, path);
} catch (e) {
callback(e, null, null, sheet);
}
});
} else {
callback(e, null, null, sheet, webInfo, path);
}
}, env, newVars);
}
function loadStyleSheets(callback, reload, newVars) {
for (var i = 0; i < less.sheets.length; i++) {
loadStyleSheet(less.sheets[i], callback, reload, less.sheets.length - (i + 1), newVars);
}
}
function initRunningMode(){
if (less.env === 'development') {
less.optimization = 0;
less.watchTimer = setInterval(function () {
if (less.watchMode) {
loadStyleSheets(function (e, root, _, sheet, env) {
if (e) {
error(e, sheet.href);
} else if (root) {
createCSS(root.toCSS(less), sheet, env.lastModified);
}
});
}
}, less.poll);
} else {
less.optimization = 3;
}
}
//
// 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; };
if (/!watch/.test(location.hash)) {
less.watch();
}
if (less.env != 'development') {
try {
cache = (typeof(window.localStorage) === 'undefined') ? null : window.localStorage;
} catch (_) {}
}
//
// Get all <link> tags with the 'rel' attribute set to "stylesheet/less"
//
var links = document.getElementsByTagName('link');
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
//
less.modifyVars = function(record) {
var newVars = "";
for (var name in record) {
newVars += ((name.slice(0,1) === '@')? '' : '@') + name +': '+
((record[name].slice(-1) === ';')? record[name] : record[name] +';');
}
less.refresh(false, newVars);
};
less.refresh = function (reload, newVars) {
var startTime, endTime;
startTime = endTime = new Date();
loadStyleSheets(function (e, root, _, sheet, env) {
if (e) {
return error(e, sheet.href);
}
if (env.local) {
log("loading " + sheet.href + " from cache.", logLevel.info);
} else {
log("parsed " + sheet.href + " successfully.", logLevel.info);
createCSS(root.toCSS(less), sheet, env.lastModified);
}
log("css for " + sheet.href + " generated in " + (new Date() - endTime) + 'ms', logLevel.info);
if (env.remaining === 0) {
log("css generated in " + (new Date() - startTime) + 'ms', logLevel.info);
}
endTime = new Date();
}, reload, newVars);
loadStyles(newVars);
};
less.refreshStyles = loadStyles;
less.Parser.fileLoader = loadFile;
less.refresh(less.env === 'development');
// amd.js
//
// Define Less as an AMD module.
if (typeof define === "function" && define.amd) {
define(function () { return less; } );
}
})(window);
Raw
test.html
<html>
<head>
<style type="text/less">
// A variable we want to modify
@myvar: "is not updating my var";
#myel::after {
content: @myvar;
}
</style>
<script src="less-1.5.0.js"></script>
<script>
try {
less.modifyVars({
'@myvar': '"has updated my var"'
});
} catch(e) {
$('body').append($('<pre/>').text(e.stack));
throw e;
}
</script>
</head>
<body>
<div id="myel">less </div>
</body>
</html>
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