masto-fe/app/javascript/mastodon/features/emoji/emoji_utils.js
2017-10-07 12:17:02 +02:00

258 lines
5.8 KiB
JavaScript

// This code is largely borrowed from:
// https://github.com/missive/emoji-mart/blob/5f2ffcc/src/utils/index.js
import data from './emoji_mart_data_light';
const buildSearch = (data) => {
const search = [];
let addToSearch = (strings, split) => {
if (!strings) {
return;
}
(Array.isArray(strings) ? strings : [strings]).forEach((string) => {
(split ? string.split(/[-|_|\s]+/) : [string]).forEach((s) => {
s = s.toLowerCase();
if (search.indexOf(s) === -1) {
search.push(s);
}
});
});
};
addToSearch(data.short_names, true);
addToSearch(data.name, true);
addToSearch(data.keywords, false);
addToSearch(data.emoticons, false);
return search.join(',');
};
const _String = String;
const stringFromCodePoint = _String.fromCodePoint || function () {
let MAX_SIZE = 0x4000;
let codeUnits = [];
let highSurrogate;
let lowSurrogate;
let index = -1;
let length = arguments.length;
if (!length) {
return '';
}
let result = '';
while (++index < length) {
let codePoint = Number(arguments[index]);
if (
!isFinite(codePoint) || // `NaN`, `+Infinity`, or `-Infinity`
codePoint < 0 || // not a valid Unicode code point
codePoint > 0x10FFFF || // not a valid Unicode code point
Math.floor(codePoint) !== codePoint // not an integer
) {
throw RangeError('Invalid code point: ' + codePoint);
}
if (codePoint <= 0xFFFF) { // BMP code point
codeUnits.push(codePoint);
} else { // Astral code point; split in surrogate halves
// http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
codePoint -= 0x10000;
highSurrogate = (codePoint >> 10) + 0xD800;
lowSurrogate = (codePoint % 0x400) + 0xDC00;
codeUnits.push(highSurrogate, lowSurrogate);
}
if (index + 1 === length || codeUnits.length > MAX_SIZE) {
result += String.fromCharCode.apply(null, codeUnits);
codeUnits.length = 0;
}
}
return result;
};
const _JSON = JSON;
const COLONS_REGEX = /^(?:\:([^\:]+)\:)(?:\:skin-tone-(\d)\:)?$/;
const SKINS = [
'1F3FA', '1F3FB', '1F3FC',
'1F3FD', '1F3FE', '1F3FF',
];
function unifiedToNative(unified) {
let unicodes = unified.split('-'),
codePoints = unicodes.map((u) => `0x${u}`);
return stringFromCodePoint.apply(null, codePoints);
}
function sanitize(emoji) {
let { name, short_names, skin_tone, skin_variations, emoticons, unified, custom, imageUrl } = emoji,
id = emoji.id || short_names[0],
colons = `:${id}:`;
if (custom) {
return {
id,
name,
colons,
emoticons,
custom,
imageUrl,
};
}
if (skin_tone) {
colons += `:skin-tone-${skin_tone}:`;
}
return {
id,
name,
colons,
emoticons,
unified: unified.toLowerCase(),
skin: skin_tone || (skin_variations ? 1 : null),
native: unifiedToNative(unified),
};
}
function getSanitizedData() {
return sanitize(getData(...arguments));
}
function getData(emoji, skin, set) {
let emojiData = {};
if (typeof emoji === 'string') {
let matches = emoji.match(COLONS_REGEX);
if (matches) {
emoji = matches[1];
if (matches[2]) {
skin = parseInt(matches[2]);
}
}
if (data.short_names.hasOwnProperty(emoji)) {
emoji = data.short_names[emoji];
}
if (data.emojis.hasOwnProperty(emoji)) {
emojiData = data.emojis[emoji];
}
} else if (emoji.id) {
if (data.short_names.hasOwnProperty(emoji.id)) {
emoji.id = data.short_names[emoji.id];
}
if (data.emojis.hasOwnProperty(emoji.id)) {
emojiData = data.emojis[emoji.id];
skin = skin || emoji.skin;
}
}
if (!Object.keys(emojiData).length) {
emojiData = emoji;
emojiData.custom = true;
if (!emojiData.search) {
emojiData.search = buildSearch(emoji);
}
}
emojiData.emoticons = emojiData.emoticons || [];
emojiData.variations = emojiData.variations || [];
if (emojiData.skin_variations && skin > 1 && set) {
emojiData = JSON.parse(_JSON.stringify(emojiData));
let skinKey = SKINS[skin - 1],
variationData = emojiData.skin_variations[skinKey];
if (!variationData.variations && emojiData.variations) {
delete emojiData.variations;
}
if (variationData[`has_img_${set}`]) {
emojiData.skin_tone = skin;
for (let k in variationData) {
let v = variationData[k];
emojiData[k] = v;
}
}
}
if (emojiData.variations && emojiData.variations.length) {
emojiData = JSON.parse(_JSON.stringify(emojiData));
emojiData.unified = emojiData.variations.shift();
}
return emojiData;
}
function uniq(arr) {
return arr.reduce((acc, item) => {
if (acc.indexOf(item) === -1) {
acc.push(item);
}
return acc;
}, []);
}
function intersect(a, b) {
const uniqA = uniq(a);
const uniqB = uniq(b);
return uniqA.filter(item => uniqB.indexOf(item) >= 0);
}
function deepMerge(a, b) {
let o = {};
for (let key in a) {
let originalValue = a[key],
value = originalValue;
if (b.hasOwnProperty(key)) {
value = b[key];
}
if (typeof value === 'object') {
value = deepMerge(originalValue, value);
}
o[key] = value;
}
return o;
}
// https://github.com/sonicdoe/measure-scrollbar
function measureScrollbar() {
const div = document.createElement('div');
div.style.width = '100px';
div.style.height = '100px';
div.style.overflow = 'scroll';
div.style.position = 'absolute';
div.style.top = '-9999px';
document.body.appendChild(div);
const scrollbarWidth = div.offsetWidth - div.clientWidth;
document.body.removeChild(div);
return scrollbarWidth;
}
export {
getData,
getSanitizedData,
uniq,
intersect,
deepMerge,
unifiedToNative,
measureScrollbar,
};