HelpProject/frontend/node_modules/style-to-object/dist/style-to-object.js

(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.StyleToObject = factory());
})(this, (function () { 'use strict';

	function getDefaultExportFromCjs (x) {
		return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
	}

	var inlineStyleParser;
	var hasRequiredInlineStyleParser;

	function requireInlineStyleParser () {
		if (hasRequiredInlineStyleParser) return inlineStyleParser;
		hasRequiredInlineStyleParser = 1;
		// 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}
		 */
		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;
		}
		return inlineStyleParser;
	}

	var inlineStyleParserExports = requireInlineStyleParser();
	var parse = /*@__PURE__*/getDefaultExportFromCjs(inlineStyleParserExports);

	/**
	 * Parses inline style to object.
	 *
	 * @param style - Inline style.
	 * @param iterator - Iterator.
	 * @returns - Style object or null.
	 *
	 * @example Parsing inline style to object:
	 *
	 * ```js
	 * import parse from 'style-to-object';
	 * parse('line-height: 42;'); // { 'line-height': '42' }
	 * ```
	 */
	function StyleToObject(style, iterator) {
	    var styleObject = null;
	    if (!style || typeof style !== 'string') {
	        return styleObject;
	    }
	    var declarations = parse(style);
	    var hasIterator = typeof iterator === 'function';
	    declarations.forEach(function (declaration) {
	        if (declaration.type !== 'declaration') {
	            return;
	        }
	        var property = declaration.property, value = declaration.value;
	        if (hasIterator) {
	            iterator(property, value, declaration);
	        }
	        else if (value) {
	            styleObject = styleObject || {};
	            styleObject[property] = value;
	        }
	    });
	    return styleObject;
	}

	return StyleToObject;

}));
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