node-less
Version:
Less Compiler For Node
1,104 lines (1,051 loc) • 50 kB
JavaScript
(function(module) {
var tree = {
evalEnv : require('./lib/evalEnv.js'),
importVisitor : require('./lib/importVisitor.js'),
joinSelectorVisitor : require('./lib/joinSelectorVisitor.js'),
mixin : require('./lib/mixin.js'),
processExtendsVisitor : require('./lib/processExtendsVisitor.js'),
parseEnv : require('./lib/parseEnv.js'),
Alpha : require('./lib/alpha.js'),
Anonymous : require('./lib/anonymous.js'),
Assignment : require('./lib/assignment.js'),
Attribute : require('./lib/attribute.js'),
Call : require('./lib/call.js'),
Color : require('./lib/color.js'),
Condition : require('./lib/condition.js'),
Combinator : require('./lib/combinator.js'),
Comment : require('./lib/comment.js'),
Dimension : require('./lib/dimension.js'),
Directive : require('./lib/directive.js'),
Element : require('./lib/element.js'),
Extend : require('./lib/extend.js'),
Expression : require('./lib/expression.js'),
Import : require('./lib/import.js'),
JavaScript : require('./lib/javascript.js'),
Keyword : require('./lib/keyword.js'),
Media : require('./lib/media.js'),
Negative : require('./lib/negative.js'),
Operation : require('./lib/operation.js'),
Paren : require('./lib/paren.js'),
Quoted : require('./lib/quoted.js'),
Rule : require('./lib/rule.js'),
Ruleset : require('./lib/ruleset.js'),
Selector : require('./lib/selector.js'),
UnicodeDescriptor : require('./lib/unicodeDescriptor.js'),
URL : require('./lib/url.js'),
Value : require('./lib/value.js'),
Variable : require('./lib/variable.js')
};
var Parser = function (env) {
var input, // LeSS input string
i, // current index in `input`
j, // current chunk
temp, // temporarily holds a chunk's state, for backtracking
memo, // temporarily holds `i`, when backtracking
furthest, // furthest index the parser has gone to
chunks, // chunkified input
current, // index of current chunk, in `input`
parser;
var that = this;
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, callback) {
var parserImporter = this;
this.queue.push(path);
Parser.importer(path, currentFileInfo, function (e, root, fullPath) {
parserImporter.queue.splice(parserImporter.queue.indexOf(path), 1);
var imported = fullPath in parserImporter.files;
parserImporter.files[fullPath] = root;
if (e && !parserImporter.error) { parserImporter.error = e; }
callback(e, root, imported);
}, env);
}
};
var save = function() {
temp = chunks[j];
memo = i;
current = i;
};
var restore = function() {
chunks[j] = temp;
i = memo;
current = i;
};
var sync = function() {
if (i > current) {
chunks[j] = chunks[j].slice(i - current);
current = i;
}
};
var isWhitespace = function(c) {
var code = c.charCodeAt(0);
return code === 32 || code === 10 || code === 9;
};
var $ = function(tok) {
var match, args, length, index, k;
if (tok instanceof Function) {
return tok.call(parser.parsers);
} 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;
}
}
if (match) {
skipWhitespace(length);
if(typeof(match) === 'string') {
return match;
} else {
return match.length === 1 ? match[0] : match;
}
}
};
var skipWhitespace = function(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;
};
var expect = function(arg, msg) {
var result = $(arg);
if (! result) {
error(msg || (typeof(arg) === 'string' ? "expected '" + arg + "' got '" + input.charAt(i) + "'" : "unexpected token"));
} else {
return result;
}
};
var error = function(msg, type) {
var e = new Error(msg);
e.index = i;
e.type = type || 'Syntax';
throw e;
};
var peek = function(tok) {
if (typeof(tok) === 'string') {
return input.charAt(i) === tok;
} else {
if (tok.test(chunks[j])) {
return true;
} else {
return false;
}
}
}
var getInput = function(e, env) {
if (e.filename && env.currentFileInfo.filename && (e.filename !== env.currentFileInfo.filename)) {
return parser.imports.contents[e.filename];
} else {
return input;
}
};
var getLocation = function(index, input) {
for (var n = index, column = -1; n >= 0 && input.charAt(n) !== '\n'; n--) {
column++
}
return {
line : typeof(index) === 'number' ? (input.slice(0, index).match(/\n/g) || "").length : null,
column : column
};
}
var getDebugInfo = function(index, inputStream, env) {
var filename = require('path').resolve(filename);
return {
lineNumber: getLocation(index, inputStream).line + 1,
fileName: filename
};
};
var LessError = function(e, env) {
var input = getInput(e, env),
loc = getLocation(e.index, input),
line = loc.line,
col = loc.column,
lines = input.split('\n');
this.type = e.type || 'Syntax';
this.message = e.message;
this.filename = e.filename || env.currentFileInfo.filename;
this.index = e.index;
this.line = typeof(line) === 'number' ? line + 1 : null;
this.callLine = e.call && (getLocation(e.call, input).line + 1);
this.callExtract = lines[getLocation(e.call, input).line];
this.stack = e.stack;
this.column = col;
this.extract = [
lines[line - 1],
lines[line],
lines[line + 1]
];
};
LessError.prototype = new Error();
LessError.prototype.constructor = LessError;
this.env = env = env || {};
this.optimization = ('optimization' in this.env) ? this.env.optimization : 1;
return parser = {
imports: imports,
parse: function (str, callback) {
var root, start, end, zone, line, lines, buff = [], c, error = null;
i = j = current = furthest = 0;
input = str.replace(/\r\n/g, '\n');
input = input.replace(/^\uFEFF/, '');
chunks = (function (chunks) {
var j = 0,
skip = /(?:@\{[\w-]+\}|[^"'`\{\}\/\(\)\\])+/g,
comment = /\/\*(?:[^*]|\*+[^\/*])*\*+\/|\/\/.*/g,
string = /"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'|`((?:[^`]|\\.)*)`/g,
level = 0,
match,
chunk = chunks[0],
inParam;
for (var i = 0, c, cc; i < input.length;) {
skip.lastIndex = i;
if (match = skip.exec(input)) {
if (match.index === i) {
i += match[0].length;
chunk.push(match[0]);
}
}
c = input.charAt(i);
comment.lastIndex = string.lastIndex = i;
if (match = string.exec(input)) {
if (match.index === i) {
i += match[0].length;
chunk.push(match[0]);
continue;
}
}
if (!inParam && c === '/') {
cc = input.charAt(i + 1);
if (cc === '/' || cc === '*') {
if (match = comment.exec(input)) {
if (match.index === i) {
i += match[0].length;
chunk.push(match[0]);
continue;
}
}
}
}
switch (c) {
case '{': if (! inParam) { level ++; chunk.push(c); break }
case '}': if (! inParam) { level --; chunk.push(c); chunks[++j] = chunk = []; break }
case '(': if (! inParam) { inParam = true; chunk.push(c); break }
case ')': if ( inParam) { inParam = false; chunk.push(c); break }
default: chunk.push(c);
}
i++;
}
if (level != 0) {
error = new LessError({
index: i-1,
type: 'Parse',
message: (level > 0) ? "missing closing `}`" : "missing opening `{`",
filename: env.currentFileInfo.filename
}, env);
}
return chunks.map(function (c) { return c.join('') });;
})([[]]);
if (error) {
return callback(new LessError(error, env));
}
try {
root = new tree.Ruleset([], $(this.parsers.primary));
root.root = true;
root.firstRoot = true;
} catch (e) {
throw e;
return callback(new(LessError)(e, env));
}
root.toCSS = (function (evaluate) {
var line, lines, column;
return function (options, variables) {
options = options || {};
var importError,
evalEnv = new tree.evalEnv(options);
if (typeof(variables) === 'object' && !Array.isArray(variables)) {
variables = Object.keys(variables).map(function (k) {
var value = variables[k];
if (! (value instanceof tree.Value)) {
if (! (value instanceof tree.Expression)) {
value = new(tree.Expression)([value]);
}
value = new(tree.Value)([value]);
}
return new(tree.Rule)('@' + k, value, false, 0);
});
evalEnv.frames = [new(tree.Ruleset)(null, variables)];
}
try {
var evaldRoot = evaluate.call(this, evalEnv);
new(tree.joinSelectorVisitor)()
.run(evaldRoot);
new(tree.processExtendsVisitor)()
.run(evaldRoot);
var css = evaldRoot.toCSS({
compress: Boolean(options.compress),
dumpLineNumbers: env.dumpLineNumbers,
strictUnits: Boolean(options.strictUnits)});
} catch (e) {
throw new(LessError)(e, env);
}
if (options.yuicompress) {
return require('ycssmin').cssmin(css, options.maxLineLen);
} else {
return css;
}
};
})(root.eval);
if (i < input.length - 1) {
i = furthest;
lines = input.split('\n');
line = (input.slice(0, i).match(/\n/g) || "").length + 1;
for (var n = i, column = -1; n >= 0 && input.charAt(n) !== '\n'; n--) { column++ }
error = {
type: "Parse",
message: "Unrecognised input",
index: i,
filename: env.currentFileInfo.filename,
line: line,
column: 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);
}
callback(e);
}
else {
callback(null, root);
}
};
if (env.processImports !== false) {
new tree.importVisitor(this.imports, finish)
.run(root);
} else {
finish();
}
},
parsers: {
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]+/) || $(/^;+/)) {
node && root.push(node);
}
return root;
},
comment: function () {
var comment;
if (input.charAt(i) !== '/') return;
if (input.charAt(i + 1) === '/') {
return new(tree.Comment)($(/^\/\/.*/), true);
} else if (comment = $(/^\/\*(?:[^*]|\*+[^\/*])*\*+\/\n?/)) {
return new(tree.Comment)(comment);
}
},
entities: {
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);
}
},
keyword: function () {
var k;
if (k = $(/^[_A-Za-z-][_A-Za-z0-9-]*/)) {
if (tree.Color.hasOwnProperty(k)) {
return new(tree.Color)(tree.colors[k].slice(1));
} else {
return new(tree.Keyword)(k);
}
}
},
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;
}
}
$('(');
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);
},
assignment: function () {
var key, value;
if ((key = $(/^\w+(?=\s?=)/i)) && $('=') && (value = $(this.entity))) {
return new(tree.Assignment)(key, value);
}
},
url: function () {
var value;
if (input.charAt(i) !== 'u' || !$(/^url\(/)) return;
value = $(this.entities.quoted) || $(this.entities.variable) ||
$(/^(?:(?:\\[\(\)'"])|[^\(\)'"])+/) || "";
expect(')');
return new(tree.URL)((value.value != null || value instanceof tree.Variable)
? value : new(tree.Anonymous)(value), env.currentFileInfo);
},
variable: function () {
var name, index = i;
if (input.charAt(i) === '@' && (name = $(/^@@?[\w-]+/))) {
return new(tree.Variable)(name, index, env.currentFileInfo);
}
},
variableCurly: function () {
var name, curly, index = i;
if (input.charAt(i) === '@' && (curly = $(/^@\{([\w-]+)\}/))) {
return new(tree.Variable)("@" + curly[1], index, env.currentFileInfo);
}
},
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]);
}
},
dimension: function () {
var value, c = input.charCodeAt(i);
if ((c > 57 || c < 43) || c === 47 || c == 44) return;
if (value = $(/^([+-]?\d*\.?\d+)(%|[a-z]+)?/)) {
return new(tree.Dimension)(value[1], value[2]);
}
},
unicodeDescriptor: function () {
var ud;
if (ud = $(/^U\+[0-9a-fA-F?]+(\-[0-9a-fA-F?]+)?/)) {
return new(tree.UnicodeDescriptor)(ud[0]);
}
},
javascript: function () {
var str, j = i, e;
if (input.charAt(j) === '~') { j++, e = true } // Escaped strings
if (input.charAt(j) !== '`') { return }
e && $('~');
if (str = $(/^`([^`]*)`/)) {
return new(tree.JavaScript)(str[1], i, e);
}
}
},
variable: function () {
var name;
if (input.charAt(i) === '@' && (name = $(/^(@[\w-]+)\s*:/))) { return name[1] }
},
extend: function(isRule) {
var elements, e, index = i, option, extendList = [];
if (!$(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: function() {
return this.extend(true);
},
mixin: {
call: function () {
var elements = [], e, c, args, delim, arg, index = i, s = input.charAt(i), important = false;
if (s !== '.' && s !== '#') { return }
save();
while (e = $(/^[#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/)) {
elements.push(new(tree.Element)(c, e, i));
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.comment);
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)
|| $(this.entities.keyword);
}
if (!arg) {
break;
}
nameLoop = null;
if (arg.throwAwayComments) {
arg.throwAwayComments();
}
value = arg;
var val = null;
if (isCall) {
if (arg.value.length == 1) {
var val = arg.value[0];
}
} else {
val = arg;
}
if (val && val instanceof tree.Variable) {
if ($(':')) {
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;
},
definition: function () {
var name, params = [], match, ruleset, param, value, cond, variadic = false;
if ((input.charAt(i) !== '.' && input.charAt(i) !== '#') ||
peek(/^[^{]*\}/)) return;
save();
if (match = $(/^([#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\s*\(/)) {
name = match[1];
var argInfo = this.mixin.args.call(this, false);
params = argInfo.args;
variadic = argInfo.variadic;
if (!$(')')) {
furthest = i;
restore();
}
$(this.comment);
if ($(/^when/)) { // Guard
cond = expect(this.conditions, 'expected condition');
}
ruleset = $(this.block);
if (ruleset) {
return new(tree.mixin.Definition)(name, params, ruleset, cond, variadic);
} else {
restore();
}
}
}
},
entity: function () {
return $(this.entities.literal) || $(this.entities.variable) || $(this.entities.url) ||
$(this.entities.call) || $(this.entities.keyword) ||$(this.entities.javascript) ||
$(this.comment);
},
end: function () {
return $(';') || peek('}');
},
alpha: function () {
var value;
if (! $(/^\(opacity=/i)) return;
if (value = $(/^\d+/) || $(this.entities.variable)) {
expect(')');
return new(tree.Alpha)(value);
}
},
element: function () {
var e, t, c, v;
c = $(this.combinator);
e = $(/^(?:\d+\.\d+|\d+)%/) || $(/^(?:[.#]?|:*)(?:[\w-]|[^\x00-\x9f]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) ||
$('*') || $('&') || $(this.attribute) || $(/^\([^()@]+\)/) || $(/^[\.#](?=@)/) || $(this.entities.variableCurly);
if (! e) {
if ($('(')) {
if ((v = ($(this.selector))) &&
$(')')) {
e = new(tree.Paren)(v);
}
}
}
if (e) { return new(tree.Element)(c, e, i) }
},
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);
}
},
selector: function () {
var sel, e, elements = [], c, extend, extendList = [];
while ((extend = $(this.extend)) || (e = $(this.element))) {
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); }
if (extendList.length) { error("Extend must be used to extend a selector, it cannot be used on its own"); }
},
attribute: function () {
var attr = '', 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) || $(/^[\w-]+/) || $(this.entities.variableCurly);
}
expect(']');
return new(tree.Attribute)(key, op, val);
},
block: function () {
var content;
if ($('{') && (content = $(this.primary)) && $('}')) {
return content;
}
},
ruleset: function () {
var selectors = [], s, rules, debugInfo;
save();
if (env.dumpLineNumbers)
debugInfo = getDebugInfo(i, input, env);
while (s = $(this.selector)) {
selectors.push(s);
$(this.comment);
if (! $(',')) { break }
$(this.comment);
}
if (selectors.length > 0 && (rules = $(this.block))) {
var ruleset = new(tree.Ruleset)(selectors, rules, env.strictImports);
if (env.dumpLineNumbers)
ruleset.debugInfo = debugInfo;
return ruleset;
} else {
furthest = i;
restore();
}
},
rule: function (tryAnonymous) {
var name, value, c = input.charAt(i), important;
save();
if (c === '.' || c === '#' || c === '&') { return }
if (name = $(this.variable) || $(this.property)) {
value = !tryAnonymous && (env.compress || (name.charAt(0) === '@')) ?
($(this.value) || $(this.anonymousValue)) :
($(this.anonymousValue) || $(this.value));
important = $(this.important);
if (value && $(this.end)) {
return new(tree.Rule)(name, value, important, 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]);
}
},
"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;
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)/);
if (opt) {
return opt[1];
}
},
mediaFeature: function () {
var e, p, nodes = [];
do {
if (e = $(this.entities.keyword)) {
nodes.push(e);
} else if ($('(')) {
p = $(this.property);
e = $(this.value);
if ($(')')) {
if (p && e) {
nodes.push(new(tree.Paren)(new(tree.Rule)(p, e, null, 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);
if(env.dumpLineNumbers)
media.debugInfo = debugInfo;
return media;
}
}
},
directive: function () {
var name, value, rules, identifier, e, nodes, nonVendorSpecificName,
hasBlock, hasIdentifier, hasExpression;
if (input.charAt(i) !== '@') return;
if (value = $(this['import']) || $(this.media)) {
return value;
}
save();
name = $(/^@[a-z-]+/);
if (!name) return;
nonVendorSpecificName = name;
if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) {
nonVendorSpecificName = "@" + name.slice(name.indexOf('-', 2) + 1);
}
switch(nonVendorSpecificName) {
case "@font-face":
hasBlock = true;
break;
case "@viewport":
case "@top-left":
case "@top-left-corner":
case "@top-center":
case "@top-right":
case "@top-right-corner":
case "@bottom-left":
case "@bottom-left-corner":
case "@bottom-center":
case "@bottom-right":
case "@bottom-right-corner":
case "@left-top":
case "@left-middle":
case "@left-bottom":
case "@right-top":
case "@right-middle":
case "@right-bottom":
hasBlock = true;
break;
case "@page":
case "@document":
case "@supports":
case "@keyframes":
hasBlock = true;
hasIdentifier = true;
break;
case "@namespace":
hasExpression = true;
break;
}
if (hasIdentifier) {
name += " " + ($(/^[^{]+/) || '').trim();
}
if (hasBlock)
{
if (rules = $(this.block)) {
return new(tree.Directive)(name, rules);
}
} else {
if ((value = hasExpression ? $(this.expression) : $(this.entity)) && $(';')) {
var directive = new(tree.Directive)(name, value);
if (env.dumpLineNumbers) {
directive.debugInfo = getDebugInfo(i, input, env);
}
return directive;
}
}
restore();
},
value: function () {
var e, expressions = [], important;
while (e = $(this.expression)) {
expressions.push(e);
if (! $(',')) { break }
}
if (expressions.length > 0) {
return new(tree.Value)(expressions);
}
},
important: function () {
if (input.charAt(i) === '!') {
return $(/^! *important/);
}
},
sub: function () {
var a, e;
if ($('(')) {
if (a = $(this.addition)) {
e = new(tree.Expression)([a]);
expect(')');
e.parens = true;
return e;
}
}
},
multiplication: function () {
var m, a, op, operation, isSpaced, expression = [];
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 = $(this.condition)) {
while ($(',') && (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;
}
},
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;
},
expression: function () {
var e, delim, entities = [], d;
while (e = $(this.addition) || $(this.entity)) {
entities.push(e);
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];
}
}
}
};
};
module.exports = Parser;
})(module);