698 lines
18 KiB
JavaScript
698 lines
18 KiB
JavaScript
/*********************************************************************
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* These are commonly used parsers for CSS Values they take a string *
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* to parse and return a string after it's been converted, if needed *
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********************************************************************/
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'use strict';
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const namedColors = require('./named_colors.json');
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exports.TYPES = {
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INTEGER: 1,
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NUMBER: 2,
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LENGTH: 3,
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PERCENT: 4,
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URL: 5,
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COLOR: 6,
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STRING: 7,
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ANGLE: 8,
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KEYWORD: 9,
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NULL_OR_EMPTY_STR: 10,
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};
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// rough regular expressions
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var integerRegEx = /^[-+]?[0-9]+$/;
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var numberRegEx = /^[-+]?[0-9]*\.[0-9]+$/;
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var lengthRegEx = /^(0|[-+]?[0-9]*\.?[0-9]+(in|cm|em|mm|pt|pc|px|ex|rem|vh|vw))$/;
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var percentRegEx = /^[-+]?[0-9]*\.?[0-9]+%$/;
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var urlRegEx = /^url\(\s*([^)]*)\s*\)$/;
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var stringRegEx = /^("[^"]*"|'[^']*')$/;
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var colorRegEx1 = /^#[0-9a-fA-F][0-9a-fA-F][0-9a-fA-F]([0-9a-fA-F][0-9a-fA-F][0-9a-fA-F])?$/;
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var colorRegEx2 = /^rgb\(([^)]*)\)$/;
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var colorRegEx3 = /^rgba\(([^)]*)\)$/;
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var colorRegEx4 = /^hsla?\(\s*(-?\d+|-?\d*.\d+)\s*,\s*(-?\d+|-?\d*.\d+)%\s*,\s*(-?\d+|-?\d*.\d+)%\s*(,\s*(-?\d+|-?\d*.\d+)\s*)?\)/;
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var angleRegEx = /^([-+]?[0-9]*\.?[0-9]+)(deg|grad|rad)$/;
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// This will return one of the above types based on the passed in string
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exports.valueType = function valueType(val) {
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if (val === '' || val === null) {
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return exports.TYPES.NULL_OR_EMPTY_STR;
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}
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if (typeof val === 'number') {
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val = val.toString();
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}
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if (typeof val !== 'string') {
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return undefined;
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}
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if (integerRegEx.test(val)) {
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return exports.TYPES.INTEGER;
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}
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if (numberRegEx.test(val)) {
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return exports.TYPES.NUMBER;
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}
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if (lengthRegEx.test(val)) {
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return exports.TYPES.LENGTH;
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}
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if (percentRegEx.test(val)) {
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return exports.TYPES.PERCENT;
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}
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if (urlRegEx.test(val)) {
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return exports.TYPES.URL;
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}
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if (stringRegEx.test(val)) {
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return exports.TYPES.STRING;
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}
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if (angleRegEx.test(val)) {
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return exports.TYPES.ANGLE;
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}
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if (colorRegEx1.test(val)) {
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return exports.TYPES.COLOR;
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}
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var res = colorRegEx2.exec(val);
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var parts;
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if (res !== null) {
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parts = res[1].split(/\s*,\s*/);
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if (parts.length !== 3) {
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return undefined;
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}
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if (
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parts.every(percentRegEx.test.bind(percentRegEx)) ||
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parts.every(integerRegEx.test.bind(integerRegEx))
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) {
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return exports.TYPES.COLOR;
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}
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return undefined;
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}
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res = colorRegEx3.exec(val);
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if (res !== null) {
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parts = res[1].split(/\s*,\s*/);
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if (parts.length !== 4) {
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return undefined;
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}
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if (
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parts.slice(0, 3).every(percentRegEx.test.bind(percentRegEx)) ||
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parts.every(integerRegEx.test.bind(integerRegEx))
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) {
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if (numberRegEx.test(parts[3])) {
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return exports.TYPES.COLOR;
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}
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}
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return undefined;
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}
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if (colorRegEx4.test(val)) {
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return exports.TYPES.COLOR;
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}
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// could still be a color, one of the standard keyword colors
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val = val.toLowerCase();
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if (namedColors.includes(val)) {
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return exports.TYPES.COLOR;
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}
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switch (val) {
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// the following are deprecated in CSS3
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case 'activeborder':
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case 'activecaption':
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case 'appworkspace':
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case 'background':
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case 'buttonface':
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case 'buttonhighlight':
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case 'buttonshadow':
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case 'buttontext':
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case 'captiontext':
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case 'graytext':
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case 'highlight':
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case 'highlighttext':
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case 'inactiveborder':
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case 'inactivecaption':
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case 'inactivecaptiontext':
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case 'infobackground':
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case 'infotext':
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case 'menu':
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case 'menutext':
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case 'scrollbar':
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case 'threeddarkshadow':
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case 'threedface':
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case 'threedhighlight':
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case 'threedlightshadow':
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case 'threedshadow':
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case 'window':
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case 'windowframe':
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case 'windowtext':
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return exports.TYPES.COLOR;
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default:
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return exports.TYPES.KEYWORD;
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}
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};
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exports.parseInteger = function parseInteger(val) {
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var type = exports.valueType(val);
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if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
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return val;
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}
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if (type !== exports.TYPES.INTEGER) {
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return undefined;
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}
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return String(parseInt(val, 10));
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};
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exports.parseNumber = function parseNumber(val) {
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var type = exports.valueType(val);
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if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
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return val;
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}
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if (type !== exports.TYPES.NUMBER && type !== exports.TYPES.INTEGER) {
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return undefined;
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}
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return String(parseFloat(val));
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};
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exports.parseLength = function parseLength(val) {
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if (val === 0 || val === '0') {
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return '0px';
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}
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var type = exports.valueType(val);
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if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
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return val;
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}
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if (type !== exports.TYPES.LENGTH) {
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return undefined;
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}
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return val;
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};
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exports.parsePercent = function parsePercent(val) {
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if (val === 0 || val === '0') {
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return '0%';
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}
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var type = exports.valueType(val);
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if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
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return val;
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}
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if (type !== exports.TYPES.PERCENT) {
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return undefined;
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}
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return val;
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};
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// either a length or a percent
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exports.parseMeasurement = function parseMeasurement(val) {
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var length = exports.parseLength(val);
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if (length !== undefined) {
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return length;
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}
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return exports.parsePercent(val);
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};
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exports.parseUrl = function parseUrl(val) {
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var type = exports.valueType(val);
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if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
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return val;
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}
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var res = urlRegEx.exec(val);
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// does it match the regex?
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if (!res) {
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return undefined;
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}
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var str = res[1];
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// if it starts with single or double quotes, does it end with the same?
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if ((str[0] === '"' || str[0] === "'") && str[0] !== str[str.length - 1]) {
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return undefined;
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}
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if (str[0] === '"' || str[0] === "'") {
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str = str.substr(1, str.length - 2);
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}
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var i;
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for (i = 0; i < str.length; i++) {
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switch (str[i]) {
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case '(':
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case ')':
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case ' ':
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case '\t':
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case '\n':
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case "'":
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case '"':
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return undefined;
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case '\\':
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i++;
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break;
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}
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}
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return 'url(' + str + ')';
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};
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exports.parseString = function parseString(val) {
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var type = exports.valueType(val);
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if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
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return val;
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}
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if (type !== exports.TYPES.STRING) {
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return undefined;
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}
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var i;
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for (i = 1; i < val.length - 1; i++) {
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switch (val[i]) {
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case val[0]:
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return undefined;
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case '\\':
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i++;
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while (i < val.length - 1 && /[0-9A-Fa-f]/.test(val[i])) {
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i++;
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}
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break;
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}
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}
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if (i >= val.length) {
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return undefined;
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}
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return val;
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};
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exports.parseColor = function parseColor(val) {
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var type = exports.valueType(val);
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if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
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return val;
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}
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var red,
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green,
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blue,
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hue,
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saturation,
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lightness,
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alpha = 1;
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var parts;
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var res = colorRegEx1.exec(val);
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// is it #aaa or #ababab
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if (res) {
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var hex = val.substr(1);
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if (hex.length === 3) {
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hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
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}
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red = parseInt(hex.substr(0, 2), 16);
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green = parseInt(hex.substr(2, 2), 16);
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blue = parseInt(hex.substr(4, 2), 16);
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return 'rgb(' + red + ', ' + green + ', ' + blue + ')';
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}
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res = colorRegEx2.exec(val);
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if (res) {
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parts = res[1].split(/\s*,\s*/);
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if (parts.length !== 3) {
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return undefined;
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}
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if (parts.every(percentRegEx.test.bind(percentRegEx))) {
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red = Math.floor((parseFloat(parts[0].slice(0, -1)) * 255) / 100);
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green = Math.floor((parseFloat(parts[1].slice(0, -1)) * 255) / 100);
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blue = Math.floor((parseFloat(parts[2].slice(0, -1)) * 255) / 100);
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} else if (parts.every(integerRegEx.test.bind(integerRegEx))) {
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red = parseInt(parts[0], 10);
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green = parseInt(parts[1], 10);
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blue = parseInt(parts[2], 10);
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} else {
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return undefined;
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}
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red = Math.min(255, Math.max(0, red));
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green = Math.min(255, Math.max(0, green));
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blue = Math.min(255, Math.max(0, blue));
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return 'rgb(' + red + ', ' + green + ', ' + blue + ')';
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}
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res = colorRegEx3.exec(val);
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if (res) {
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parts = res[1].split(/\s*,\s*/);
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if (parts.length !== 4) {
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return undefined;
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}
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if (parts.slice(0, 3).every(percentRegEx.test.bind(percentRegEx))) {
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red = Math.floor((parseFloat(parts[0].slice(0, -1)) * 255) / 100);
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green = Math.floor((parseFloat(parts[1].slice(0, -1)) * 255) / 100);
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blue = Math.floor((parseFloat(parts[2].slice(0, -1)) * 255) / 100);
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alpha = parseFloat(parts[3]);
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} else if (parts.slice(0, 3).every(integerRegEx.test.bind(integerRegEx))) {
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red = parseInt(parts[0], 10);
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green = parseInt(parts[1], 10);
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blue = parseInt(parts[2], 10);
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alpha = parseFloat(parts[3]);
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} else {
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return undefined;
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}
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if (isNaN(alpha)) {
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alpha = 1;
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}
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red = Math.min(255, Math.max(0, red));
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green = Math.min(255, Math.max(0, green));
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blue = Math.min(255, Math.max(0, blue));
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alpha = Math.min(1, Math.max(0, alpha));
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if (alpha === 1) {
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return 'rgb(' + red + ', ' + green + ', ' + blue + ')';
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}
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return 'rgba(' + red + ', ' + green + ', ' + blue + ', ' + alpha + ')';
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}
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res = colorRegEx4.exec(val);
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if (res) {
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const [, _hue, _saturation, _lightness, _alphaString = ''] = res;
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const _alpha = parseFloat(_alphaString.replace(',', '').trim());
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if (!_hue || !_saturation || !_lightness) {
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return undefined;
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}
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hue = parseFloat(_hue);
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saturation = parseInt(_saturation, 10);
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lightness = parseInt(_lightness, 10);
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if (_alpha && numberRegEx.test(_alpha)) {
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alpha = parseFloat(_alpha);
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}
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if (!_alphaString || alpha === 1) {
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return 'hsl(' + hue + ', ' + saturation + '%, ' + lightness + '%)';
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}
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return 'hsla(' + hue + ', ' + saturation + '%, ' + lightness + '%, ' + alpha + ')';
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}
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if (type === exports.TYPES.COLOR) {
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return val;
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}
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return undefined;
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};
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exports.parseAngle = function parseAngle(val) {
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var type = exports.valueType(val);
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if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
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return val;
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}
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if (type !== exports.TYPES.ANGLE) {
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return undefined;
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}
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var res = angleRegEx.exec(val);
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var flt = parseFloat(res[1]);
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if (res[2] === 'rad') {
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flt *= 180 / Math.PI;
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} else if (res[2] === 'grad') {
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flt *= 360 / 400;
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}
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while (flt < 0) {
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flt += 360;
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}
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while (flt > 360) {
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flt -= 360;
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}
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return flt + 'deg';
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};
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exports.parseKeyword = function parseKeyword(val, valid_keywords) {
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var type = exports.valueType(val);
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if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
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return val;
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}
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if (type !== exports.TYPES.KEYWORD) {
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return undefined;
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}
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val = val.toString().toLowerCase();
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var i;
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for (i = 0; i < valid_keywords.length; i++) {
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if (valid_keywords[i].toLowerCase() === val) {
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return valid_keywords[i];
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}
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}
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return undefined;
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};
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// utility to translate from border-width to borderWidth
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var dashedToCamelCase = function(dashed) {
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var i;
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var camel = '';
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var nextCap = false;
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for (i = 0; i < dashed.length; i++) {
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if (dashed[i] !== '-') {
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camel += nextCap ? dashed[i].toUpperCase() : dashed[i];
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nextCap = false;
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} else {
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nextCap = true;
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}
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}
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return camel;
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};
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exports.dashedToCamelCase = dashedToCamelCase;
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var is_space = /\s/;
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var opening_deliminators = ['"', "'", '('];
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var closing_deliminators = ['"', "'", ')'];
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// this splits on whitespace, but keeps quoted and parened parts together
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var getParts = function(str) {
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var deliminator_stack = [];
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var length = str.length;
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var i;
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var parts = [];
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var current_part = '';
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var opening_index;
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var closing_index;
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for (i = 0; i < length; i++) {
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opening_index = opening_deliminators.indexOf(str[i]);
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closing_index = closing_deliminators.indexOf(str[i]);
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if (is_space.test(str[i])) {
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if (deliminator_stack.length === 0) {
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if (current_part !== '') {
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parts.push(current_part);
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}
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current_part = '';
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} else {
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current_part += str[i];
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}
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} else {
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if (str[i] === '\\') {
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i++;
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current_part += str[i];
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} else {
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current_part += str[i];
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if (
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closing_index !== -1 &&
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closing_index === deliminator_stack[deliminator_stack.length - 1]
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) {
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deliminator_stack.pop();
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} else if (opening_index !== -1) {
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deliminator_stack.push(opening_index);
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}
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}
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}
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}
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if (current_part !== '') {
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parts.push(current_part);
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}
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return parts;
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};
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/*
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* this either returns undefined meaning that it isn't valid
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* or returns an object where the keys are dashed short
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* hand properties and the values are the values to set
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* on them
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*/
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exports.shorthandParser = function parse(v, shorthand_for) {
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var obj = {};
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var type = exports.valueType(v);
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if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
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Object.keys(shorthand_for).forEach(function(property) {
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obj[property] = '';
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});
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return obj;
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}
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if (typeof v === 'number') {
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v = v.toString();
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}
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if (typeof v !== 'string') {
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return undefined;
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}
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if (v.toLowerCase() === 'inherit') {
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return {};
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}
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var parts = getParts(v);
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var valid = true;
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parts.forEach(function(part, i) {
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var part_valid = false;
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Object.keys(shorthand_for).forEach(function(property) {
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if (shorthand_for[property].isValid(part, i)) {
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part_valid = true;
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obj[property] = part;
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}
|
|
});
|
|
valid = valid && part_valid;
|
|
});
|
|
if (!valid) {
|
|
return undefined;
|
|
}
|
|
return obj;
|
|
};
|
|
|
|
exports.shorthandSetter = function(property, shorthand_for) {
|
|
return function(v) {
|
|
var obj = exports.shorthandParser(v, shorthand_for);
|
|
if (obj === undefined) {
|
|
return;
|
|
}
|
|
//console.log('shorthandSetter for:', property, 'obj:', obj);
|
|
Object.keys(obj).forEach(function(subprop) {
|
|
// in case subprop is an implicit property, this will clear
|
|
// *its* subpropertiesX
|
|
var camel = dashedToCamelCase(subprop);
|
|
this[camel] = obj[subprop];
|
|
// in case it gets translated into something else (0 -> 0px)
|
|
obj[subprop] = this[camel];
|
|
this.removeProperty(subprop);
|
|
// don't add in empty properties
|
|
if (obj[subprop] !== '') {
|
|
this._values[subprop] = obj[subprop];
|
|
}
|
|
}, this);
|
|
Object.keys(shorthand_for).forEach(function(subprop) {
|
|
if (!obj.hasOwnProperty(subprop)) {
|
|
this.removeProperty(subprop);
|
|
delete this._values[subprop];
|
|
}
|
|
}, this);
|
|
// in case the value is something like 'none' that removes all values,
|
|
// check that the generated one is not empty, first remove the property
|
|
// if it already exists, then call the shorthandGetter, if it's an empty
|
|
// string, don't set the property
|
|
this.removeProperty(property);
|
|
var calculated = exports.shorthandGetter(property, shorthand_for).call(this);
|
|
if (calculated !== '') {
|
|
this._setProperty(property, calculated);
|
|
}
|
|
};
|
|
};
|
|
|
|
exports.shorthandGetter = function(property, shorthand_for) {
|
|
return function() {
|
|
if (this._values[property] !== undefined) {
|
|
return this.getPropertyValue(property);
|
|
}
|
|
return Object.keys(shorthand_for)
|
|
.map(function(subprop) {
|
|
return this.getPropertyValue(subprop);
|
|
}, this)
|
|
.filter(function(value) {
|
|
return value !== '';
|
|
})
|
|
.join(' ');
|
|
};
|
|
};
|
|
|
|
// isValid(){1,4} | inherit
|
|
// if one, it applies to all
|
|
// if two, the first applies to the top and bottom, and the second to left and right
|
|
// if three, the first applies to the top, the second to left and right, the third bottom
|
|
// if four, top, right, bottom, left
|
|
exports.implicitSetter = function(property_before, property_after, isValid, parser) {
|
|
property_after = property_after || '';
|
|
if (property_after !== '') {
|
|
property_after = '-' + property_after;
|
|
}
|
|
var part_names = ['top', 'right', 'bottom', 'left'];
|
|
|
|
return function(v) {
|
|
if (typeof v === 'number') {
|
|
v = v.toString();
|
|
}
|
|
if (typeof v !== 'string') {
|
|
return undefined;
|
|
}
|
|
var parts;
|
|
if (v.toLowerCase() === 'inherit' || v === '') {
|
|
parts = [v];
|
|
} else {
|
|
parts = getParts(v);
|
|
}
|
|
if (parts.length < 1 || parts.length > 4) {
|
|
return undefined;
|
|
}
|
|
|
|
if (!parts.every(isValid)) {
|
|
return undefined;
|
|
}
|
|
|
|
parts = parts.map(function(part) {
|
|
return parser(part);
|
|
});
|
|
this._setProperty(property_before + property_after, parts.join(' '));
|
|
if (parts.length === 1) {
|
|
parts[1] = parts[0];
|
|
}
|
|
if (parts.length === 2) {
|
|
parts[2] = parts[0];
|
|
}
|
|
if (parts.length === 3) {
|
|
parts[3] = parts[1];
|
|
}
|
|
|
|
for (var i = 0; i < 4; i++) {
|
|
var property = property_before + '-' + part_names[i] + property_after;
|
|
this.removeProperty(property);
|
|
if (parts[i] !== '') {
|
|
this._values[property] = parts[i];
|
|
}
|
|
}
|
|
return v;
|
|
};
|
|
};
|
|
|
|
//
|
|
// Companion to implicitSetter, but for the individual parts.
|
|
// This sets the individual value, and checks to see if all four
|
|
// sub-parts are set. If so, it sets the shorthand version and removes
|
|
// the individual parts from the cssText.
|
|
//
|
|
exports.subImplicitSetter = function(prefix, part, isValid, parser) {
|
|
var property = prefix + '-' + part;
|
|
var subparts = [prefix + '-top', prefix + '-right', prefix + '-bottom', prefix + '-left'];
|
|
|
|
return function(v) {
|
|
if (typeof v === 'number') {
|
|
v = v.toString();
|
|
}
|
|
if (typeof v !== 'string') {
|
|
return undefined;
|
|
}
|
|
if (!isValid(v)) {
|
|
return undefined;
|
|
}
|
|
v = parser(v);
|
|
this._setProperty(property, v);
|
|
var parts = [];
|
|
for (var i = 0; i < 4; i++) {
|
|
if (this._values[subparts[i]] == null || this._values[subparts[i]] === '') {
|
|
break;
|
|
}
|
|
parts.push(this._values[subparts[i]]);
|
|
}
|
|
if (parts.length === 4) {
|
|
for (i = 0; i < 4; i++) {
|
|
this.removeProperty(subparts[i]);
|
|
this._values[subparts[i]] = parts[i];
|
|
}
|
|
this._setProperty(prefix, parts.join(' '));
|
|
}
|
|
return v;
|
|
};
|
|
};
|
|
|
|
var camel_to_dashed = /[A-Z]/g;
|
|
var first_segment = /^\([^-]\)-/;
|
|
var vendor_prefixes = ['o', 'moz', 'ms', 'webkit'];
|
|
exports.camelToDashed = function(camel_case) {
|
|
var match;
|
|
var dashed = camel_case.replace(camel_to_dashed, '-$&').toLowerCase();
|
|
match = dashed.match(first_segment);
|
|
if (match && vendor_prefixes.indexOf(match[1]) !== -1) {
|
|
dashed = '-' + dashed;
|
|
}
|
|
return dashed;
|
|
};
|