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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');
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,
};
// 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))$/;
var percentRegEx = /^[-+]?[0-9]*\.?[0-9]+%$/;
var urlRegEx = /^url\(\s*([^)]*)\s*\)$/;
var stringRegEx = /^("[^"]*"|'[^']*')$/;
var colorRegEx1 = /^#([0-9a-fA-F]{3,4}){1,2}$/;
var colorRegEx2 = /^rgb\(([^)]*)\)$/;
var colorRegEx3 = /^rgba\(([^)]*)\)$/;
var 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();
}
Iif (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;
}
Iif (stringRegEx.test(val)) {
return exports.TYPES.STRING;
}
Iif (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*/);
Iif (parts.length !== 3) {
return undefined;
}
Eif (
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*/);
Iif (parts.length !== 4) {
return undefined;
}
if (
parts.slice(0, 3).every(percentRegEx.test.bind(percentRegEx)) ||
parts.every(integerRegEx.test.bind(integerRegEx))
) {
Eif (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);
Iif (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) {
Iif (val === 0 || val === '0') {
return '0%';
}
var type = exports.valueType(val);
Iif (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 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?
Iif ((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];
Eif (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);
Eif (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*/);
Iif (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 Eif (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*/);
Iif (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 Eif (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;
}
Iif (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());
Iif (!_hue || !_saturation || !_lightness) {
return undefined;
}
hue = parseFloat(_hue);
saturation = parseInt(_saturation, 10);
lightness = parseInt(_lightness, 10);
if (_alpha && numberRegEx.test(_alpha)) {
alpha = parseFloat(_alpha);
}
if (!_alphaString || alpha === 1) {
return 'hsl(' + hue + ', ' + saturation + '%, ' + lightness + '%)';
}
return 'hsla(' + hue + ', ' + saturation + '%, ' + lightness + '%, ' + 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);
Iif (type === exports.TYPES.NULL_OR_EMPTY_STR) {
return val;
}
Iif (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 {
Iif (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();
}
Iif (typeof v !== 'string') {
return undefined;
}
Iif (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;
});
Iif (!valid) {
return undefined;
}
return obj;
};
exports.shorthandSetter = function(property, shorthand_for) {
return function(v) {
var obj = exports.shorthandParser(v, shorthand_for);
Iif (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();
}
Iif (typeof v !== 'string') {
return undefined;
}
var parts;
if (v.toLowerCase() === 'inherit' || v === '') {
parts = [v];
} else {
parts = getParts(v);
}
Iif (parts.length < 1 || parts.length > 4) {
return undefined;
}
Iif (!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) {
Iif (typeof v === 'number') {
v = v.toString();
}
Iif (typeof v !== 'string') {
return undefined;
}
Iif (!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;
};
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