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+/*********************************************************************
+ * These are commonly used parsers for CSS Values they take a string *
+ * to parse and return a string after it's been converted, if needed *
+ ********************************************************************/
+'use strict';
+
+const namedColors = require('./named_colors.json');
+const { hslToRgb } = require('./utils/colorSpace');
+
+exports.TYPES = {
+ INTEGER: 1,
+ NUMBER: 2,
+ LENGTH: 3,
+ PERCENT: 4,
+ URL: 5,
+ COLOR: 6,
+ STRING: 7,
+ ANGLE: 8,
+ KEYWORD: 9,
+ NULL_OR_EMPTY_STR: 10,
+ CALC: 11,
+};
+
+// rough regular expressions
+var integerRegEx = /^[-+]?[0-9]+$/;
+var numberRegEx = /^[-+]?[0-9]*\.?[0-9]+$/;
+var lengthRegEx = /^(0|[-+]?[0-9]*\.?[0-9]+(in|cm|em|mm|pt|pc|px|ex|rem|vh|vw|ch))$/;
+var percentRegEx = /^[-+]?[0-9]*\.?[0-9]+%$/;
+var urlRegEx = /^url\(\s*([^)]*)\s*\)$/;
+var stringRegEx = /^("[^"]*"|'[^']*')$/;
+var colorRegEx1 = /^#([0-9a-fA-F]{3,4}){1,2}$/;
+var colorRegEx2 = /^rgb\(([^)]*)\)$/;
+var colorRegEx3 = /^rgba\(([^)]*)\)$/;
+var calcRegEx = /^calc\(([^)]*)\)$/;
+var colorRegEx4 = /^hsla?\(\s*(-?\d+|-?\d*.\d+)\s*,\s*(-?\d+|-?\d*.\d+)%\s*,\s*(-?\d+|-?\d*.\d+)%\s*(,\s*(-?\d+|-?\d*.\d+)\s*)?\)/;
+var angleRegEx = /^([-+]?[0-9]*\.?[0-9]+)(deg|grad|rad)$/;
+
+// This will return one of the above types based on the passed in string
+exports.valueType = function valueType(val) {
+ if (val === '' || val === null) {
+ return exports.TYPES.NULL_OR_EMPTY_STR;
+ }
+ if (typeof val === 'number') {
+ val = val.toString();
+ }
+
+ if (typeof val !== 'string') {
+ return undefined;
+ }
+
+ if (integerRegEx.test(val)) {
+ return exports.TYPES.INTEGER;
+ }
+ if (numberRegEx.test(val)) {
+ return exports.TYPES.NUMBER;
+ }
+ if (lengthRegEx.test(val)) {
+ return exports.TYPES.LENGTH;
+ }
+ if (percentRegEx.test(val)) {
+ return exports.TYPES.PERCENT;
+ }
+ if (urlRegEx.test(val)) {
+ return exports.TYPES.URL;
+ }
+ if (calcRegEx.test(val)) {
+ return exports.TYPES.CALC;
+ }
+ if (stringRegEx.test(val)) {
+ return exports.TYPES.STRING;
+ }
+ if (angleRegEx.test(val)) {
+ return exports.TYPES.ANGLE;
+ }
+ if (colorRegEx1.test(val)) {
+ return exports.TYPES.COLOR;
+ }
+
+ var res = colorRegEx2.exec(val);
+ var parts;
+ if (res !== null) {
+ parts = res[1].split(/\s*,\s*/);
+ if (parts.length !== 3) {
+ return undefined;
+ }
+ if (
+ parts.every(percentRegEx.test.bind(percentRegEx)) ||
+ parts.every(integerRegEx.test.bind(integerRegEx))
+ ) {
+ return exports.TYPES.COLOR;
+ }
+ return undefined;
+ }
+ res = colorRegEx3.exec(val);
+ if (res !== null) {
+ parts = res[1].split(/\s*,\s*/);
+ if (parts.length !== 4) {
+ return undefined;
+ }
+ if (
+ parts.slice(0, 3).every(percentRegEx.test.bind(percentRegEx)) ||
+ parts.slice(0, 3).every(integerRegEx.test.bind(integerRegEx))
+ ) {
+ if (numberRegEx.test(parts[3])) {
+ return exports.TYPES.COLOR;
+ }
+ }
+ return undefined;
+ }
+
+ if (colorRegEx4.test(val)) {
+ return exports.TYPES.COLOR;
+ }
+
+ // could still be a color, one of the standard keyword colors
+ val = val.toLowerCase();
+
+ if (namedColors.includes(val)) {
+ return exports.TYPES.COLOR;
+ }
+
+ switch (val) {
+ // the following are deprecated in CSS3
+ case 'activeborder':
+ case 'activecaption':
+ case 'appworkspace':
+ case 'background':
+ case 'buttonface':
+ case 'buttonhighlight':
+ case 'buttonshadow':
+ case 'buttontext':
+ case 'captiontext':
+ case 'graytext':
+ case 'highlight':
+ case 'highlighttext':
+ case 'inactiveborder':
+ case 'inactivecaption':
+ case 'inactivecaptiontext':
+ case 'infobackground':
+ case 'infotext':
+ case 'menu':
+ case 'menutext':
+ case 'scrollbar':
+ case 'threeddarkshadow':
+ case 'threedface':
+ case 'threedhighlight':
+ case 'threedlightshadow':
+ case 'threedshadow':
+ case 'window':
+ case 'windowframe':
+ case 'windowtext':
+ return exports.TYPES.COLOR;
+ default:
+ return exports.TYPES.KEYWORD;
+ }
+};
+
+exports.parseInteger = function parseInteger(val) {
+ var type = exports.valueType(val);
+ if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
+ return val;
+ }
+ if (type !== exports.TYPES.INTEGER) {
+ return undefined;
+ }
+ return String(parseInt(val, 10));
+};
+
+exports.parseNumber = function parseNumber(val) {
+ var type = exports.valueType(val);
+ if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
+ return val;
+ }
+ if (type !== exports.TYPES.NUMBER && type !== exports.TYPES.INTEGER) {
+ return undefined;
+ }
+ return String(parseFloat(val));
+};
+
+exports.parseLength = function parseLength(val) {
+ if (val === 0 || val === '0') {
+ return '0px';
+ }
+ var type = exports.valueType(val);
+ if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
+ return val;
+ }
+ if (type !== exports.TYPES.LENGTH) {
+ return undefined;
+ }
+ return val;
+};
+
+exports.parsePercent = function parsePercent(val) {
+ if (val === 0 || val === '0') {
+ return '0%';
+ }
+ var type = exports.valueType(val);
+ if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
+ return val;
+ }
+ if (type !== exports.TYPES.PERCENT) {
+ return undefined;
+ }
+ return val;
+};
+
+// either a length or a percent
+exports.parseMeasurement = function parseMeasurement(val) {
+ var type = exports.valueType(val);
+ if (type === exports.TYPES.CALC) {
+ return val;
+ }
+
+ var length = exports.parseLength(val);
+ if (length !== undefined) {
+ return length;
+ }
+ return exports.parsePercent(val);
+};
+
+exports.parseUrl = function parseUrl(val) {
+ var type = exports.valueType(val);
+ if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
+ return val;
+ }
+ var res = urlRegEx.exec(val);
+ // does it match the regex?
+ if (!res) {
+ return undefined;
+ }
+ var str = res[1];
+ // if it starts with single or double quotes, does it end with the same?
+ if ((str[0] === '"' || str[0] === "'") && str[0] !== str[str.length - 1]) {
+ return undefined;
+ }
+ if (str[0] === '"' || str[0] === "'") {
+ str = str.substr(1, str.length - 2);
+ }
+
+ var i;
+ for (i = 0; i < str.length; i++) {
+ switch (str[i]) {
+ case '(':
+ case ')':
+ case ' ':
+ case '\t':
+ case '\n':
+ case "'":
+ case '"':
+ return undefined;
+ case '\\':
+ i++;
+ break;
+ }
+ }
+
+ return 'url(' + str + ')';
+};
+
+exports.parseString = function parseString(val) {
+ var type = exports.valueType(val);
+ if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
+ return val;
+ }
+ if (type !== exports.TYPES.STRING) {
+ return undefined;
+ }
+ var i;
+ for (i = 1; i < val.length - 1; i++) {
+ switch (val[i]) {
+ case val[0]:
+ return undefined;
+ case '\\':
+ i++;
+ while (i < val.length - 1 && /[0-9A-Fa-f]/.test(val[i])) {
+ i++;
+ }
+ break;
+ }
+ }
+ if (i >= val.length) {
+ return undefined;
+ }
+ return val;
+};
+
+exports.parseColor = function parseColor(val) {
+ var type = exports.valueType(val);
+ if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
+ return val;
+ }
+ var red,
+ green,
+ blue,
+ hue,
+ saturation,
+ lightness,
+ alpha = 1;
+ var parts;
+ var res = colorRegEx1.exec(val);
+ // is it #aaa, #ababab, #aaaa, #abababaa
+ if (res) {
+ var defaultHex = val.substr(1);
+ var hex = val.substr(1);
+ if (hex.length === 3 || hex.length === 4) {
+ hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
+
+ if (defaultHex.length === 4) {
+ hex = hex + defaultHex[3] + defaultHex[3];
+ }
+ }
+ red = parseInt(hex.substr(0, 2), 16);
+ green = parseInt(hex.substr(2, 2), 16);
+ blue = parseInt(hex.substr(4, 2), 16);
+ if (hex.length === 8) {
+ var hexAlpha = hex.substr(6, 2);
+ var hexAlphaToRgbaAlpha = Number((parseInt(hexAlpha, 16) / 255).toFixed(3));
+
+ return 'rgba(' + red + ', ' + green + ', ' + blue + ', ' + hexAlphaToRgbaAlpha + ')';
+ }
+ return 'rgb(' + red + ', ' + green + ', ' + blue + ')';
+ }
+
+ res = colorRegEx2.exec(val);
+ if (res) {
+ parts = res[1].split(/\s*,\s*/);
+ if (parts.length !== 3) {
+ return undefined;
+ }
+ if (parts.every(percentRegEx.test.bind(percentRegEx))) {
+ red = Math.floor((parseFloat(parts[0].slice(0, -1)) * 255) / 100);
+ green = Math.floor((parseFloat(parts[1].slice(0, -1)) * 255) / 100);
+ blue = Math.floor((parseFloat(parts[2].slice(0, -1)) * 255) / 100);
+ } else if (parts.every(integerRegEx.test.bind(integerRegEx))) {
+ red = parseInt(parts[0], 10);
+ green = parseInt(parts[1], 10);
+ blue = parseInt(parts[2], 10);
+ } else {
+ return undefined;
+ }
+ red = Math.min(255, Math.max(0, red));
+ green = Math.min(255, Math.max(0, green));
+ blue = Math.min(255, Math.max(0, blue));
+ return 'rgb(' + red + ', ' + green + ', ' + blue + ')';
+ }
+
+ res = colorRegEx3.exec(val);
+ if (res) {
+ parts = res[1].split(/\s*,\s*/);
+ if (parts.length !== 4) {
+ return undefined;
+ }
+ if (parts.slice(0, 3).every(percentRegEx.test.bind(percentRegEx))) {
+ red = Math.floor((parseFloat(parts[0].slice(0, -1)) * 255) / 100);
+ green = Math.floor((parseFloat(parts[1].slice(0, -1)) * 255) / 100);
+ blue = Math.floor((parseFloat(parts[2].slice(0, -1)) * 255) / 100);
+ alpha = parseFloat(parts[3]);
+ } else if (parts.slice(0, 3).every(integerRegEx.test.bind(integerRegEx))) {
+ red = parseInt(parts[0], 10);
+ green = parseInt(parts[1], 10);
+ blue = parseInt(parts[2], 10);
+ alpha = parseFloat(parts[3]);
+ } else {
+ return undefined;
+ }
+ if (isNaN(alpha)) {
+ alpha = 1;
+ }
+ red = Math.min(255, Math.max(0, red));
+ green = Math.min(255, Math.max(0, green));
+ blue = Math.min(255, Math.max(0, blue));
+ alpha = Math.min(1, Math.max(0, alpha));
+ if (alpha === 1) {
+ return 'rgb(' + red + ', ' + green + ', ' + blue + ')';
+ }
+ return 'rgba(' + red + ', ' + green + ', ' + blue + ', ' + alpha + ')';
+ }
+
+ res = colorRegEx4.exec(val);
+ if (res) {
+ const [, _hue, _saturation, _lightness, _alphaString = ''] = res;
+ const _alpha = parseFloat(_alphaString.replace(',', '').trim());
+ if (!_hue || !_saturation || !_lightness) {
+ return undefined;
+ }
+ hue = parseFloat(_hue);
+ saturation = parseInt(_saturation, 10);
+ lightness = parseInt(_lightness, 10);
+ if (_alpha && numberRegEx.test(_alpha)) {
+ alpha = parseFloat(_alpha);
+ }
+
+ const [r, g, b] = hslToRgb(hue, saturation / 100, lightness / 100);
+ if (!_alphaString || alpha === 1) {
+ return 'rgb(' + r + ', ' + g + ', ' + b + ')';
+ }
+ return 'rgba(' + r + ', ' + g + ', ' + b + ', ' + alpha + ')';
+ }
+
+ if (type === exports.TYPES.COLOR) {
+ return val;
+ }
+ return undefined;
+};
+
+exports.parseAngle = function parseAngle(val) {
+ var type = exports.valueType(val);
+ if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
+ return val;
+ }
+ if (type !== exports.TYPES.ANGLE) {
+ return undefined;
+ }
+ var res = angleRegEx.exec(val);
+ var flt = parseFloat(res[1]);
+ if (res[2] === 'rad') {
+ flt *= 180 / Math.PI;
+ } else if (res[2] === 'grad') {
+ flt *= 360 / 400;
+ }
+
+ while (flt < 0) {
+ flt += 360;
+ }
+ while (flt > 360) {
+ flt -= 360;
+ }
+ return flt + 'deg';
+};
+
+exports.parseKeyword = function parseKeyword(val, valid_keywords) {
+ var type = exports.valueType(val);
+ if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
+ return val;
+ }
+ if (type !== exports.TYPES.KEYWORD) {
+ return undefined;
+ }
+ val = val.toString().toLowerCase();
+ var i;
+ for (i = 0; i < valid_keywords.length; i++) {
+ if (valid_keywords[i].toLowerCase() === val) {
+ return valid_keywords[i];
+ }
+ }
+ return undefined;
+};
+
+// utility to translate from border-width to borderWidth
+var dashedToCamelCase = function(dashed) {
+ var i;
+ var camel = '';
+ var nextCap = false;
+ for (i = 0; i < dashed.length; i++) {
+ if (dashed[i] !== '-') {
+ camel += nextCap ? dashed[i].toUpperCase() : dashed[i];
+ nextCap = false;
+ } else {
+ nextCap = true;
+ }
+ }
+ return camel;
+};
+exports.dashedToCamelCase = dashedToCamelCase;
+
+var is_space = /\s/;
+var opening_deliminators = ['"', "'", '('];
+var closing_deliminators = ['"', "'", ')'];
+// this splits on whitespace, but keeps quoted and parened parts together
+var getParts = function(str) {
+ var deliminator_stack = [];
+ var length = str.length;
+ var i;
+ var parts = [];
+ var current_part = '';
+ var opening_index;
+ var closing_index;
+ for (i = 0; i < length; i++) {
+ opening_index = opening_deliminators.indexOf(str[i]);
+ closing_index = closing_deliminators.indexOf(str[i]);
+ if (is_space.test(str[i])) {
+ if (deliminator_stack.length === 0) {
+ if (current_part !== '') {
+ parts.push(current_part);
+ }
+ current_part = '';
+ } else {
+ current_part += str[i];
+ }
+ } else {
+ if (str[i] === '\\') {
+ i++;
+ current_part += str[i];
+ } else {
+ current_part += str[i];
+ if (
+ closing_index !== -1 &&
+ closing_index === deliminator_stack[deliminator_stack.length - 1]
+ ) {
+ deliminator_stack.pop();
+ } else if (opening_index !== -1) {
+ deliminator_stack.push(opening_index);
+ }
+ }
+ }
+ }
+ if (current_part !== '') {
+ parts.push(current_part);
+ }
+ return parts;
+};
+
+/*
+ * this either returns undefined meaning that it isn't valid
+ * or returns an object where the keys are dashed short
+ * hand properties and the values are the values to set
+ * on them
+ */
+exports.shorthandParser = function parse(v, shorthand_for) {
+ var obj = {};
+ var type = exports.valueType(v);
+ if (type === exports.TYPES.NULL_OR_EMPTY_STR) {
+ Object.keys(shorthand_for).forEach(function(property) {
+ obj[property] = '';
+ });
+ return obj;
+ }
+
+ if (typeof v === 'number') {
+ v = v.toString();
+ }
+
+ if (typeof v !== 'string') {
+ return undefined;
+ }
+
+ if (v.toLowerCase() === 'inherit') {
+ return {};
+ }
+ var parts = getParts(v);
+ var valid = true;
+ parts.forEach(function(part, i) {
+ var part_valid = false;
+ Object.keys(shorthand_for).forEach(function(property) {
+ if (shorthand_for[property].isValid(part, i)) {
+ part_valid = true;
+ obj[property] = part;
+ }
+ });
+ 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;
+};