mirror of
https://github.com/advplyr/audiobookshelf.git
synced 2024-12-24 19:11:44 +01:00
604 lines
11 KiB
JavaScript
604 lines
11 KiB
JavaScript
// http://www.w3.org/TR/CSS21/grammar.html
|
|
// https://github.com/visionmedia/css-parse/pull/49#issuecomment-30088027
|
|
var commentre = /\/\*[^*]*\*+([^/*][^*]*\*+)*\//g
|
|
|
|
module.exports = function(css, options){
|
|
options = options || {};
|
|
|
|
/**
|
|
* Positional.
|
|
*/
|
|
|
|
var lineno = 1;
|
|
var column = 1;
|
|
|
|
/**
|
|
* Update lineno and column based on `str`.
|
|
*/
|
|
|
|
function updatePosition(str) {
|
|
var lines = str.match(/\n/g);
|
|
if (lines) lineno += lines.length;
|
|
var i = str.lastIndexOf('\n');
|
|
column = ~i ? str.length - i : column + str.length;
|
|
}
|
|
|
|
/**
|
|
* Mark position and patch `node.position`.
|
|
*/
|
|
|
|
function position() {
|
|
var start = { line: lineno, column: column };
|
|
return function(node){
|
|
node.position = new Position(start);
|
|
whitespace();
|
|
return node;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Store position information for a node
|
|
*/
|
|
|
|
function Position(start) {
|
|
this.start = start;
|
|
this.end = { line: lineno, column: column };
|
|
this.source = options.source;
|
|
}
|
|
|
|
/**
|
|
* Non-enumerable source string
|
|
*/
|
|
|
|
Position.prototype.content = css;
|
|
|
|
/**
|
|
* Error `msg`.
|
|
*/
|
|
|
|
var errorsList = [];
|
|
|
|
function error(msg) {
|
|
var err = new Error(options.source + ':' + lineno + ':' + column + ': ' + msg);
|
|
err.reason = msg;
|
|
err.filename = options.source;
|
|
err.line = lineno;
|
|
err.column = column;
|
|
err.source = css;
|
|
|
|
if (options.silent) {
|
|
errorsList.push(err);
|
|
} else {
|
|
throw err;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parse stylesheet.
|
|
*/
|
|
|
|
function stylesheet() {
|
|
var rulesList = rules();
|
|
|
|
return {
|
|
type: 'stylesheet',
|
|
stylesheet: {
|
|
source: options.source,
|
|
rules: rulesList,
|
|
parsingErrors: errorsList
|
|
}
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Opening brace.
|
|
*/
|
|
|
|
function open() {
|
|
return match(/^{\s*/);
|
|
}
|
|
|
|
/**
|
|
* Closing brace.
|
|
*/
|
|
|
|
function close() {
|
|
return match(/^}/);
|
|
}
|
|
|
|
/**
|
|
* Parse ruleset.
|
|
*/
|
|
|
|
function rules() {
|
|
var node;
|
|
var rules = [];
|
|
whitespace();
|
|
comments(rules);
|
|
while (css.length && css.charAt(0) != '}' && (node = atrule() || rule())) {
|
|
if (node !== false) {
|
|
rules.push(node);
|
|
comments(rules);
|
|
}
|
|
}
|
|
return rules;
|
|
}
|
|
|
|
/**
|
|
* Match `re` and return captures.
|
|
*/
|
|
|
|
function match(re) {
|
|
var m = re.exec(css);
|
|
if (!m) return;
|
|
var str = m[0];
|
|
updatePosition(str);
|
|
css = css.slice(str.length);
|
|
return m;
|
|
}
|
|
|
|
/**
|
|
* Parse whitespace.
|
|
*/
|
|
|
|
function whitespace() {
|
|
match(/^\s*/);
|
|
}
|
|
|
|
/**
|
|
* Parse comments;
|
|
*/
|
|
|
|
function comments(rules) {
|
|
var c;
|
|
rules = rules || [];
|
|
while (c = comment()) {
|
|
if (c !== false) {
|
|
rules.push(c);
|
|
}
|
|
}
|
|
return rules;
|
|
}
|
|
|
|
/**
|
|
* Parse comment.
|
|
*/
|
|
|
|
function comment() {
|
|
var pos = position();
|
|
if ('/' != css.charAt(0) || '*' != css.charAt(1)) return;
|
|
|
|
var i = 2;
|
|
while ("" != css.charAt(i) && ('*' != css.charAt(i) || '/' != css.charAt(i + 1))) ++i;
|
|
i += 2;
|
|
|
|
if ("" === css.charAt(i-1)) {
|
|
return error('End of comment missing');
|
|
}
|
|
|
|
var str = css.slice(2, i - 2);
|
|
column += 2;
|
|
updatePosition(str);
|
|
css = css.slice(i);
|
|
column += 2;
|
|
|
|
return pos({
|
|
type: 'comment',
|
|
comment: str
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Parse selector.
|
|
*/
|
|
|
|
function selector() {
|
|
var m = match(/^([^{]+)/);
|
|
if (!m) return;
|
|
/* @fix Remove all comments from selectors
|
|
* http://ostermiller.org/findcomment.html */
|
|
return trim(m[0])
|
|
.replace(/\/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*\/+/g, '')
|
|
.replace(/"(?:\\"|[^"])*"|'(?:\\'|[^'])*'/g, function(m) {
|
|
return m.replace(/,/g, '\u200C');
|
|
})
|
|
.split(/\s*(?![^(]*\)),\s*/)
|
|
.map(function(s) {
|
|
return s.replace(/\u200C/g, ',');
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Parse declaration.
|
|
*/
|
|
|
|
function declaration() {
|
|
var pos = position();
|
|
|
|
// prop
|
|
var prop = match(/^(\*?[-#\/\*\\\w]+(\[[0-9a-z_-]+\])?)\s*/);
|
|
if (!prop) return;
|
|
prop = trim(prop[0]);
|
|
|
|
// :
|
|
if (!match(/^:\s*/)) return error("property missing ':'");
|
|
|
|
// val
|
|
var val = match(/^((?:'(?:\\'|.)*?'|"(?:\\"|.)*?"|\([^\)]*?\)|[^};])+)/);
|
|
|
|
var ret = pos({
|
|
type: 'declaration',
|
|
property: prop.replace(commentre, ''),
|
|
value: val ? trim(val[0]).replace(commentre, '') : ''
|
|
});
|
|
|
|
// ;
|
|
match(/^[;\s]*/);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Parse declarations.
|
|
*/
|
|
|
|
function declarations() {
|
|
var decls = [];
|
|
|
|
if (!open()) return error("missing '{'");
|
|
comments(decls);
|
|
|
|
// declarations
|
|
var decl;
|
|
while (decl = declaration()) {
|
|
if (decl !== false) {
|
|
decls.push(decl);
|
|
comments(decls);
|
|
}
|
|
}
|
|
|
|
if (!close()) return error("missing '}'");
|
|
return decls;
|
|
}
|
|
|
|
/**
|
|
* Parse keyframe.
|
|
*/
|
|
|
|
function keyframe() {
|
|
var m;
|
|
var vals = [];
|
|
var pos = position();
|
|
|
|
while (m = match(/^((\d+\.\d+|\.\d+|\d+)%?|[a-z]+)\s*/)) {
|
|
vals.push(m[1]);
|
|
match(/^,\s*/);
|
|
}
|
|
|
|
if (!vals.length) return;
|
|
|
|
return pos({
|
|
type: 'keyframe',
|
|
values: vals,
|
|
declarations: declarations()
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Parse keyframes.
|
|
*/
|
|
|
|
function atkeyframes() {
|
|
var pos = position();
|
|
var m = match(/^@([-\w]+)?keyframes\s*/);
|
|
|
|
if (!m) return;
|
|
var vendor = m[1];
|
|
|
|
// identifier
|
|
var m = match(/^([-\w]+)\s*/);
|
|
if (!m) return error("@keyframes missing name");
|
|
var name = m[1];
|
|
|
|
if (!open()) return error("@keyframes missing '{'");
|
|
|
|
var frame;
|
|
var frames = comments();
|
|
while (frame = keyframe()) {
|
|
frames.push(frame);
|
|
frames = frames.concat(comments());
|
|
}
|
|
|
|
if (!close()) return error("@keyframes missing '}'");
|
|
|
|
return pos({
|
|
type: 'keyframes',
|
|
name: name,
|
|
vendor: vendor,
|
|
keyframes: frames
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Parse supports.
|
|
*/
|
|
|
|
function atsupports() {
|
|
var pos = position();
|
|
var m = match(/^@supports *([^{]+)/);
|
|
|
|
if (!m) return;
|
|
var supports = trim(m[1]);
|
|
|
|
if (!open()) return error("@supports missing '{'");
|
|
|
|
var style = comments().concat(rules());
|
|
|
|
if (!close()) return error("@supports missing '}'");
|
|
|
|
return pos({
|
|
type: 'supports',
|
|
supports: supports,
|
|
rules: style
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Parse host.
|
|
*/
|
|
|
|
function athost() {
|
|
var pos = position();
|
|
var m = match(/^@host\s*/);
|
|
|
|
if (!m) return;
|
|
|
|
if (!open()) return error("@host missing '{'");
|
|
|
|
var style = comments().concat(rules());
|
|
|
|
if (!close()) return error("@host missing '}'");
|
|
|
|
return pos({
|
|
type: 'host',
|
|
rules: style
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Parse media.
|
|
*/
|
|
|
|
function atmedia() {
|
|
var pos = position();
|
|
var m = match(/^@media *([^{]+)/);
|
|
|
|
if (!m) return;
|
|
var media = trim(m[1]);
|
|
|
|
if (!open()) return error("@media missing '{'");
|
|
|
|
var style = comments().concat(rules());
|
|
|
|
if (!close()) return error("@media missing '}'");
|
|
|
|
return pos({
|
|
type: 'media',
|
|
media: media,
|
|
rules: style
|
|
});
|
|
}
|
|
|
|
|
|
/**
|
|
* Parse custom-media.
|
|
*/
|
|
|
|
function atcustommedia() {
|
|
var pos = position();
|
|
var m = match(/^@custom-media\s+(--[^\s]+)\s*([^{;]+);/);
|
|
if (!m) return;
|
|
|
|
return pos({
|
|
type: 'custom-media',
|
|
name: trim(m[1]),
|
|
media: trim(m[2])
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Parse paged media.
|
|
*/
|
|
|
|
function atpage() {
|
|
var pos = position();
|
|
var m = match(/^@page */);
|
|
if (!m) return;
|
|
|
|
var sel = selector() || [];
|
|
|
|
if (!open()) return error("@page missing '{'");
|
|
var decls = comments();
|
|
|
|
// declarations
|
|
var decl;
|
|
while (decl = declaration()) {
|
|
decls.push(decl);
|
|
decls = decls.concat(comments());
|
|
}
|
|
|
|
if (!close()) return error("@page missing '}'");
|
|
|
|
return pos({
|
|
type: 'page',
|
|
selectors: sel,
|
|
declarations: decls
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Parse document.
|
|
*/
|
|
|
|
function atdocument() {
|
|
var pos = position();
|
|
var m = match(/^@([-\w]+)?document *([^{]+)/);
|
|
if (!m) return;
|
|
|
|
var vendor = trim(m[1]);
|
|
var doc = trim(m[2]);
|
|
|
|
if (!open()) return error("@document missing '{'");
|
|
|
|
var style = comments().concat(rules());
|
|
|
|
if (!close()) return error("@document missing '}'");
|
|
|
|
return pos({
|
|
type: 'document',
|
|
document: doc,
|
|
vendor: vendor,
|
|
rules: style
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Parse font-face.
|
|
*/
|
|
|
|
function atfontface() {
|
|
var pos = position();
|
|
var m = match(/^@font-face\s*/);
|
|
if (!m) return;
|
|
|
|
if (!open()) return error("@font-face missing '{'");
|
|
var decls = comments();
|
|
|
|
// declarations
|
|
var decl;
|
|
while (decl = declaration()) {
|
|
decls.push(decl);
|
|
decls = decls.concat(comments());
|
|
}
|
|
|
|
if (!close()) return error("@font-face missing '}'");
|
|
|
|
return pos({
|
|
type: 'font-face',
|
|
declarations: decls
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Parse import
|
|
*/
|
|
|
|
var atimport = _compileAtrule('import');
|
|
|
|
/**
|
|
* Parse charset
|
|
*/
|
|
|
|
var atcharset = _compileAtrule('charset');
|
|
|
|
/**
|
|
* Parse namespace
|
|
*/
|
|
|
|
var atnamespace = _compileAtrule('namespace');
|
|
|
|
/**
|
|
* Parse non-block at-rules
|
|
*/
|
|
|
|
|
|
function _compileAtrule(name) {
|
|
var re = new RegExp('^@' + name + '\\s*([^;]+);');
|
|
return function() {
|
|
var pos = position();
|
|
var m = match(re);
|
|
if (!m) return;
|
|
var ret = { type: name };
|
|
ret[name] = m[1].trim();
|
|
return pos(ret);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parse at rule.
|
|
*/
|
|
|
|
function atrule() {
|
|
if (css[0] != '@') return;
|
|
|
|
return atkeyframes()
|
|
|| atmedia()
|
|
|| atcustommedia()
|
|
|| atsupports()
|
|
|| atimport()
|
|
|| atcharset()
|
|
|| atnamespace()
|
|
|| atdocument()
|
|
|| atpage()
|
|
|| athost()
|
|
|| atfontface();
|
|
}
|
|
|
|
/**
|
|
* Parse rule.
|
|
*/
|
|
|
|
function rule() {
|
|
var pos = position();
|
|
var sel = selector();
|
|
|
|
if (!sel) return error('selector missing');
|
|
comments();
|
|
|
|
return pos({
|
|
type: 'rule',
|
|
selectors: sel,
|
|
declarations: declarations()
|
|
});
|
|
}
|
|
|
|
return addParent(stylesheet());
|
|
};
|
|
|
|
/**
|
|
* Trim `str`.
|
|
*/
|
|
|
|
function trim(str) {
|
|
return str ? str.replace(/^\s+|\s+$/g, '') : '';
|
|
}
|
|
|
|
/**
|
|
* Adds non-enumerable parent node reference to each node.
|
|
*/
|
|
|
|
function addParent(obj, parent) {
|
|
var isNode = obj && typeof obj.type === 'string';
|
|
var childParent = isNode ? obj : parent;
|
|
|
|
for (var k in obj) {
|
|
var value = obj[k];
|
|
if (Array.isArray(value)) {
|
|
value.forEach(function(v) { addParent(v, childParent); });
|
|
} else if (value && typeof value === 'object') {
|
|
addParent(value, childParent);
|
|
}
|
|
}
|
|
|
|
if (isNode) {
|
|
Object.defineProperty(obj, 'parent', {
|
|
configurable: true,
|
|
writable: true,
|
|
enumerable: false,
|
|
value: parent || null
|
|
});
|
|
}
|
|
|
|
return obj;
|
|
}
|