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Mini Shell
Mini Shell
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = global || self, global.StyleToObject = factory());
}(this, (function () { 'use strict';
// http://www.w3.org/TR/CSS21/grammar.html
// https://github.com/visionmedia/css-parse/pull/49#issuecomment-30088027
var COMMENT_REGEX = /\/\*[^*]*\*+([^/*][^*]*\*+)*\//g;
var NEWLINE_REGEX = /\n/g;
var WHITESPACE_REGEX = /^\s*/;
// declaration
var PROPERTY_REGEX = /^(\*?[-#/*\\\w]+(\[[0-9a-z_-]+\])?)\s*/;
var COLON_REGEX = /^:\s*/;
var VALUE_REGEX = /^((?:'(?:\\'|.)*?'|"(?:\\"|.)*?"|\([^)]*?\)|[^};])+)/;
var SEMICOLON_REGEX = /^[;\s]*/;
// https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String/Trim#Polyfill
var TRIM_REGEX = /^\s+|\s+$/g;
// strings
var NEWLINE = '\n';
var FORWARD_SLASH = '/';
var ASTERISK = '*';
var EMPTY_STRING = '';
// types
var TYPE_COMMENT = 'comment';
var TYPE_DECLARATION = 'declaration';
/**
* @param {String} style
* @param {Object} [options]
* @return {Object[]}
* @throws {TypeError}
* @throws {Error}
*/
var inlineStyleParser = function(style, options) {
if (typeof style !== 'string') {
throw new TypeError('First argument must be a string');
}
if (!style) return [];
options = options || {};
/**
* Positional.
*/
var lineno = 1;
var column = 1;
/**
* Update lineno and column based on `str`.
*
* @param {String} str
*/
function updatePosition(str) {
var lines = str.match(NEWLINE_REGEX);
if (lines) lineno += lines.length;
var i = str.lastIndexOf(NEWLINE);
column = ~i ? str.length - i : column + str.length;
}
/**
* Mark position and patch `node.position`.
*
* @return {Function}
*/
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.
*
* @constructor
* @property {Object} start
* @property {Object} end
* @property {undefined|String} source
*/
function Position(start) {
this.start = start;
this.end = { line: lineno, column: column };
this.source = options.source;
}
/**
* Non-enumerable source string.
*/
Position.prototype.content = style;
/**
* Error `msg`.
*
* @param {String} msg
* @throws {Error}
*/
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 = style;
if (options.silent) ; else {
throw err;
}
}
/**
* Match `re` and return captures.
*
* @param {RegExp} re
* @return {undefined|Array}
*/
function match(re) {
var m = re.exec(style);
if (!m) return;
var str = m[0];
updatePosition(str);
style = style.slice(str.length);
return m;
}
/**
* Parse whitespace.
*/
function whitespace() {
match(WHITESPACE_REGEX);
}
/**
* Parse comments.
*
* @param {Object[]} [rules]
* @return {Object[]}
*/
function comments(rules) {
var c;
rules = rules || [];
while ((c = comment())) {
if (c !== false) {
rules.push(c);
}
}
return rules;
}
/**
* Parse comment.
*
* @return {Object}
* @throws {Error}
*/
function comment() {
var pos = position();
if (FORWARD_SLASH != style.charAt(0) || ASTERISK != style.charAt(1)) return;
var i = 2;
while (
EMPTY_STRING != style.charAt(i) &&
(ASTERISK != style.charAt(i) || FORWARD_SLASH != style.charAt(i + 1))
) {
++i;
}
i += 2;
if (EMPTY_STRING === style.charAt(i - 1)) {
return error('End of comment missing');
}
var str = style.slice(2, i - 2);
column += 2;
updatePosition(str);
style = style.slice(i);
column += 2;
return pos({
type: TYPE_COMMENT,
comment: str
});
}
/**
* Parse declaration.
*
* @return {Object}
* @throws {Error}
*/
function declaration() {
var pos = position();
// prop
var prop = match(PROPERTY_REGEX);
if (!prop) return;
comment();
// :
if (!match(COLON_REGEX)) return error("property missing ':'");
// val
var val = match(VALUE_REGEX);
var ret = pos({
type: TYPE_DECLARATION,
property: trim(prop[0].replace(COMMENT_REGEX, EMPTY_STRING)),
value: val
? trim(val[0].replace(COMMENT_REGEX, EMPTY_STRING))
: EMPTY_STRING
});
// ;
match(SEMICOLON_REGEX);
return ret;
}
/**
* Parse declarations.
*
* @return {Object[]}
*/
function declarations() {
var decls = [];
comments(decls);
// declarations
var decl;
while ((decl = declaration())) {
if (decl !== false) {
decls.push(decl);
comments(decls);
}
}
return decls;
}
whitespace();
return declarations();
};
/**
* Trim `str`.
*
* @param {String} str
* @return {String}
*/
function trim(str) {
return str ? str.replace(TRIM_REGEX, EMPTY_STRING) : EMPTY_STRING;
}
/**
* Parses inline style to object.
*
* @example
* // returns { 'line-height': '42' }
* StyleToObject('line-height: 42;');
*
* @param {String} style - The inline style.
* @param {Function} [iterator] - The iterator function.
* @return {null|Object}
*/
function StyleToObject(style, iterator) {
var output = null;
if (!style || typeof style !== 'string') {
return output;
}
var declaration;
var declarations = inlineStyleParser(style);
var hasIterator = typeof iterator === 'function';
var property;
var value;
for (var i = 0, len = declarations.length; i < len; i++) {
declaration = declarations[i];
property = declaration.property;
value = declaration.value;
if (hasIterator) {
iterator(property, value, declaration);
} else if (value) {
output || (output = {});
output[property] = value;
}
}
return output;
}
var styleToObject = StyleToObject;
return styleToObject;
})));
Zerion Mini Shell 1.0