mirror of
https://github.com/twitter/twemoji.git
synced 2024-06-15 03:35:16 +00:00
989 lines
35 KiB
JavaScript
Executable File
989 lines
35 KiB
JavaScript
Executable File
#!/usr/bin/env node
|
|
|
|
/*! Copyright Twitter Inc. and other contributors. Licensed under MIT *//*
|
|
https://github.com/twitter/twemoji/blob/gh-pages/LICENSE
|
|
*/
|
|
|
|
// dependencies
|
|
var fs = require('fs');
|
|
var http = require('http');
|
|
var path = require('path');
|
|
|
|
function file(which) {
|
|
return path.join(__dirname, '../..', which);
|
|
}
|
|
|
|
// Twitter assets by property name
|
|
var assets = {
|
|
'2/72x72': [],
|
|
'2/svg': []
|
|
};
|
|
|
|
// white spaces we don't want to catch via the RegExp
|
|
// there is no asset equivalent for these
|
|
var ignoreMissing = ['2002', '2003', '2005'];
|
|
|
|
// basic utility to organize async code
|
|
// see: http://webreflection.blogspot.co.uk/2012/03/tweet-sized-queue-system.html
|
|
// or: http://webreflection.blogspot.co.uk/2012/06/working-with-queues.html
|
|
function Queue(args, f) {
|
|
setTimeout(args.next = function next() {
|
|
return (f = args.shift()) ? !!f(args) || !0 : !1;
|
|
}, 0);
|
|
return args;
|
|
}
|
|
|
|
// main task
|
|
Queue([
|
|
|
|
// will populate assets arrays
|
|
function grabAllAssets(q) {
|
|
console.log('analyzing all assets ... ');
|
|
// per each path/folder
|
|
Object.keys(assets).forEach(function (path, i, paths) {
|
|
// grab all files in that folder
|
|
fs.readdir(file(path), function (err, files) {
|
|
// and add them to the assets path
|
|
assets[path].push.apply(
|
|
assets[path],
|
|
files.map(upperCaseWithoutExtension)
|
|
);
|
|
// once all assets arrays have been populated
|
|
if (paths.reduce(completed, true)) {
|
|
console.log('[INFO] assets contains ' + assets[path].length + ' emoji.');
|
|
q.next();
|
|
}
|
|
});
|
|
});
|
|
// drop extension + uppercase
|
|
function upperCaseWithoutExtension(file) {
|
|
return file.slice(0, file.lastIndexOf('.')).toUpperCase();
|
|
}
|
|
// returns true if all assets have been populated
|
|
function completed(p, c) {
|
|
return p && assets[c].length;
|
|
}
|
|
},
|
|
|
|
// will fetch and store all emoji from unicode.org
|
|
function fetchEmojiSources(q) {
|
|
console.log('fetching EmojiSources.txt ... ');
|
|
// grab all emoji and test them against them
|
|
http.get("http://www.unicode.org/Public/UNIDATA/EmojiSources.txt", function (res) {
|
|
var chunks = [];
|
|
// if all good ...
|
|
if (res.statusCode === 200) {
|
|
// grab all data
|
|
res.on('data', chunks.push.bind(chunks));
|
|
// once done ...
|
|
res.on('end', function () {
|
|
console.log('analyzing EmojiSources VS our assets ... ');
|
|
// store all missing assets in one object
|
|
var missing = {};
|
|
// will be used to store an array with all missing
|
|
var missingGrouped = {};
|
|
|
|
// will be needed later on
|
|
// parse it, clean it, and store it once
|
|
q.emojiSource = chunks
|
|
.join('')
|
|
.split(/\r\n|\r|\n/)
|
|
// filter once
|
|
.filter(function (line) {
|
|
return this.test(line);
|
|
}, /^[0-9A-F]/)
|
|
// take only emoji info
|
|
.map(function (codePoint) {
|
|
return codePoint
|
|
.slice(0, codePoint.indexOf(';'))
|
|
.toUpperCase()
|
|
// drop spaces
|
|
.replace(/\s+/g, '-')
|
|
// drop 0 padded prefixes
|
|
.replace(/^0+/g, '');
|
|
});
|
|
|
|
console.log('[INFO] parsed ' + q.emojiSource.length + ' standard emoji.');
|
|
|
|
// find out which one is missing from our assets
|
|
q.emojiSource.forEach(
|
|
function (emoji) {
|
|
// do not loop for emoji we know we should ignore
|
|
if (ignoreMissing.indexOf(emoji) < 0) {
|
|
// verify all others per each folder
|
|
this.forEach(function (path) {
|
|
if (assets[path].indexOf(emoji) < 0) {
|
|
(missing[path] || (missing[path] = [])).push(emoji);
|
|
missingGrouped[emoji] = true;
|
|
}
|
|
});
|
|
}
|
|
|
|
},
|
|
// and per each folder
|
|
Object.keys(assets)
|
|
);
|
|
|
|
// if some missing emoji has been found
|
|
if (Object.keys(missing).length) {
|
|
// warn and show which one is missing
|
|
console.warn('[WARNING] missing assets for:');
|
|
console.log(missing);
|
|
}
|
|
// create the array of all emoji we should ignore
|
|
q.ignore = ignoreMissing.concat(Object.keys(missingGrouped));
|
|
|
|
q.next();
|
|
});
|
|
} else {
|
|
console.error('[ERROR] unable to fetch emoji at unicode.org');
|
|
process.exit(1);
|
|
}
|
|
});
|
|
},
|
|
|
|
// grab the list of emoji that behave differently when
|
|
// variants such \uFE0E and \uFE0F are in place
|
|
function grabStandardVariants(q) {
|
|
console.log('fetching StandardizedVariants.txt ... ');
|
|
http.get(
|
|
"http://unicode.org/Public/UNIDATA/StandardizedVariants.txt",
|
|
function(res) {
|
|
var chunks = [];
|
|
if (res.statusCode == 200) {
|
|
res.on('data', chunks.push.bind(chunks));
|
|
res.on('end', function () {
|
|
// cleaning up parsing sensitive emoji
|
|
q.variantsSensitive = chunks
|
|
.join('') // all content
|
|
.split(/\r\n|\r|\n/) // split in lines
|
|
.filter(function (line) { // containing FE0E; info
|
|
return this.test(line); // avoiding duplicated with FE0F
|
|
}, / FE0E; text style/)
|
|
.map(function (line) { // cleaned up to grab
|
|
return line.replace(this, '$1') // only first unicode
|
|
.toUpperCase(); // normalized as uppercase
|
|
}, /^([0-9A-F]{4,}) FE0E;.+$/) // sensitive char
|
|
;
|
|
|
|
// iOS keyboard allows U+002A U+FE0F U+20E3 even though not a standardized variant (yet?)
|
|
q.variantsSensitive.push('002A');
|
|
// iOS keyboard allows U+2639 U+FE0F even though not a standardized variant (yet?)
|
|
q.variantsSensitive.push('2639');
|
|
|
|
console.log('[INFO] parsed ' + q.variantsSensitive.length + ' variant sensitive emoji.');
|
|
q.next();
|
|
|
|
});
|
|
} else {
|
|
console.error('[ERROR] unable to fetch standard variants at unicode.org');
|
|
process.exit(1);
|
|
}
|
|
}
|
|
);
|
|
},
|
|
|
|
// add our own assets that are not part of the Unicode standard
|
|
function addMissingEmoji(q) {
|
|
q.nonStandard = [];
|
|
Object.keys(assets).forEach(function (path, i) {
|
|
assets[path].forEach(function (emoji) {
|
|
if (
|
|
q.emojiSource.indexOf(emoji) < 0 &&
|
|
q.nonStandard.indexOf(emoji) < 0
|
|
) {
|
|
q.nonStandard.push(emoji);
|
|
}
|
|
});
|
|
});
|
|
|
|
if (q.nonStandard.length) {
|
|
console.warn('[WARNING] assets contain ' + q.nonStandard.length + ' non standard emoji:');
|
|
// console.log(q.nonStandard.join(', '));
|
|
}
|
|
|
|
q.emojiSource = q.emojiSource.concat(q.nonStandard)
|
|
q.next();
|
|
},
|
|
|
|
// detect complete sets of five skin tones and a base
|
|
function detectDiversityEmoji(q) {
|
|
var isPresent = {};
|
|
q.emojiSource.forEach(function (codePoints) {
|
|
isPresent[codePoints] = true;
|
|
});
|
|
q.diversityBase = q.emojiSource.filter(function (codePoints) {
|
|
// Start with the set of Emoji with the light skin tone
|
|
return /-1F3FB$/.test(codePoints);
|
|
}).map(function (codePoints) {
|
|
// Take the skin tone off
|
|
return codePoints.replace(/-1F3FB$/, '');
|
|
}).filter(function (baseCodePoints) {
|
|
// Verify that all other skin tones + no skin tone are present
|
|
return ['-1F3FC', '-1F3FD', '-1F3FE', '-1F3FF', ''].every(function (suffix) {
|
|
return isPresent[baseCodePoints + suffix];
|
|
});
|
|
});
|
|
console.log('[INFO] parsed ' + q.diversityBase.length + ' diversity emoji.');
|
|
q.next();
|
|
},
|
|
|
|
// with all info, generate a RegExp that will catch
|
|
// only standard emoji that are present in our assets
|
|
function generateRegExp(q) {
|
|
console.log('generating a RegExp for available assets');
|
|
var zwj = [];
|
|
var diversity = [];
|
|
var sensitive = [];
|
|
var sensitiveKeycaps = [];
|
|
var diversitySensitive = [];
|
|
var skinToneOptions = [
|
|
'\\ud83c\\udffb',
|
|
'\\ud83c\\udffc',
|
|
'\\ud83c\\udffd',
|
|
'\\ud83c\\udffe',
|
|
'\\ud83c\\udfff'
|
|
];
|
|
var regular = [];
|
|
q.emojiSource.forEach(function (codePoints) {
|
|
var u;
|
|
var codePointsWithoutKeycap;
|
|
codePoints = codePoints.replace(/\b[A-F0-9]+\b/g, function (hex) {
|
|
// Pad all hex numbers to have at least 4 digits to match variantsSensitive
|
|
return hex.length < 4 ? ('000' + hex).slice(-4) : hex;
|
|
});
|
|
if (q.ignore.indexOf(codePoints) < 0) {
|
|
u = toJSON(codePoints);
|
|
codePointsWithoutKeycap = codePoints.replace(/-20E3$/, '');
|
|
if (codePoints.indexOf('200D') >= 0) {
|
|
zwj.push(u);
|
|
} else if (codePoints != codePointsWithoutKeycap && q.variantsSensitive.indexOf(codePointsWithoutKeycap) >= 0) {
|
|
sensitiveKeycaps.push(toJSON(codePointsWithoutKeycap));
|
|
} else if (q.diversityBase.indexOf(codePoints.replace(/-1F3F[B-F]$/, '')) >= 0) {
|
|
// This is a diversity Emoji with or without a skin tone modifier
|
|
// Add it to the regex if this is the base without the modifier
|
|
if (q.diversityBase.indexOf(codePoints) >= 0) {
|
|
if (q.variantsSensitive.indexOf(codePoints) < 0) {
|
|
diversity.push(u);
|
|
} else {
|
|
diversitySensitive.push(u);
|
|
}
|
|
}
|
|
} else if (q.variantsSensitive.indexOf(codePoints) < 0) {
|
|
regular.push(u);
|
|
} else {
|
|
sensitive.push(u);
|
|
}
|
|
}
|
|
});
|
|
|
|
q.re = '';
|
|
|
|
// The Zero-width joiner Emojis, if present, need to come first
|
|
if (zwj.length) {
|
|
q.re += generateRegexPartial(zwj) + '|';
|
|
}
|
|
|
|
// Group the variant sensitive keycaps
|
|
if (sensitiveKeycaps.length) {
|
|
q.re += '(?:' + generateRegexPartial(sensitiveKeycaps) + ')\\ufe0f?\\u20e3|';
|
|
}
|
|
|
|
// Next, add the diversity enabled Emoji that may include a skin tone suffix
|
|
if (diversity.length + diversitySensitive.length) {
|
|
q.re += '(?:';
|
|
if (diversitySensitive.length) {
|
|
// Some diversity are sensitive to variants
|
|
q.re += '(?:' + generateRegexPartial(diversitySensitive) + ')(?:\\ufe0f|(?!\\ufe0e))';
|
|
if (diversity.length) {
|
|
q.re += '|';
|
|
}
|
|
}
|
|
q.re += generateRegexPartial(diversity) + ')(?:' + generateRegexPartial(skinToneOptions) + '|)|';
|
|
}
|
|
|
|
// Next, the normal Emoji
|
|
q.re += generateRegexPartial(regular) + '|';
|
|
|
|
// Finally, add the rest of the sensitive ones that may be followed by U+FE0F but not U+FE0E
|
|
q.re += '(?:' + generateRegexPartial(sensitive) + ')(?:\\ufe0f|(?!\\ufe0e))';
|
|
q.next();
|
|
|
|
// basic utilities to convert codepoints to JSON strings
|
|
function toJSON(codePoints) {
|
|
return codePoints.split('-').map(function (point) {
|
|
return UTF162JSON(fromCodePoint(point));
|
|
}).join('');
|
|
}
|
|
function fromCodePoint(codepoint) {
|
|
var code = typeof codepoint === 'string' ?
|
|
parseInt(codepoint, 16) : codepoint;
|
|
if (code < 0x10000) {
|
|
return String.fromCharCode(code);
|
|
}
|
|
code -= 0x10000;
|
|
return String.fromCharCode(
|
|
0xD800 + (code >> 10),
|
|
0xDC00 + (code & 0x3FF)
|
|
);
|
|
}
|
|
function UTF162JSON(text) {
|
|
for (var i = 0, r = []; i < text.length; i++) {
|
|
r.push('\\u' + ('000' + text.charCodeAt(i).toString(16)).slice(-4));
|
|
}
|
|
return r.join('');
|
|
}
|
|
|
|
// Items is an array of unicode sequences with \u escaping, like ["\u2963\ufe0f", "\u263a\ufe0f"]
|
|
// items get sorted by length (long to short), then unicode hex values (high to low)
|
|
// output is "or" ed together using | for regex
|
|
// ouput also combines adjacent items using character classes with ranges when they have common prefixes
|
|
// Example: "aab", "aac", "aad", "aag", "ba" becomes "aa[b-dg]|ba"
|
|
function generateRegexPartial(items) {
|
|
var currentPrefix = null;
|
|
var result = [];
|
|
var charClass = [];
|
|
var charRange = [];
|
|
items.map(function (item) {
|
|
// Convert from "\u2963\ufe0f" into ["2963", "fe0f"]
|
|
return item.split('\\u').slice(1);
|
|
}).sort(sortMethod).forEach(function (itemParts) {
|
|
var prefix = itemParts.slice(0, -1).join('\\u');
|
|
if (prefix) {
|
|
prefix = '\\u' + prefix;
|
|
}
|
|
var suffix = itemParts.slice(-1);
|
|
if (prefix !== currentPrefix) {
|
|
flushCharClass();
|
|
}
|
|
currentPrefix = prefix;
|
|
var suffixMinusOne = UTF162JSON(String.fromCharCode(parseInt(suffix, 16) - 1));
|
|
|
|
if (charRange.length && charRange.slice(-1)[0] !== suffixMinusOne) {
|
|
flushCharRange();
|
|
}
|
|
charRange.push('\\u' + suffix);
|
|
});
|
|
|
|
flushCharClass();
|
|
return result.join('|');
|
|
|
|
// a and b are arrays of hex UCS-2 units
|
|
function sortMethod(a, b) {
|
|
return !a.length ? 0 :
|
|
b.length - a.length ||
|
|
parseInt(b[0], 16) - parseInt(a[0], 16) ||
|
|
sortMethod(b.slice(1), a.slice(1)
|
|
);
|
|
}
|
|
|
|
function flushCharRange() {
|
|
charClass = charClass.concat((charRange.length < 3) ?
|
|
charRange :
|
|
[ charRange[0], '-', charRange.slice(-1)[0] ]
|
|
);
|
|
charRange = [];
|
|
}
|
|
|
|
function flushCharClass() {
|
|
flushCharRange();
|
|
if (charClass.length) {
|
|
result.push(currentPrefix + (charClass.length == 1 ?
|
|
charClass[0] :
|
|
'[' + charClass.join('') + ']'
|
|
));
|
|
}
|
|
charClass = [];
|
|
currentPrefix = null;
|
|
}
|
|
}
|
|
|
|
},
|
|
|
|
function generateFile(q) {
|
|
console.log('generating ./twemoji.js');
|
|
createTwemoji(q.re);
|
|
require('./create-dist');
|
|
}
|
|
|
|
]);
|
|
|
|
|
|
|
|
function createTwemoji(re) {
|
|
fs.writeFileSync(
|
|
file('2/twemoji.js'),
|
|
'/*jslint indent: 2, browser: true, bitwise: true, plusplus: true */\n' +
|
|
'var twemoji = (' +
|
|
function (
|
|
/*! Copyright Twitter Inc. and other contributors. Licensed under MIT *//*
|
|
https://github.com/twitter/twemoji/blob/gh-pages/LICENSE
|
|
*/
|
|
|
|
// WARNING: this file is generated automatically via
|
|
// `node twemoji-generator.js`
|
|
// please update its `createTwemoji` function
|
|
// at the bottom of the same file instead.
|
|
|
|
) {
|
|
'use strict';
|
|
|
|
/*jshint maxparams:4 */
|
|
|
|
var
|
|
// the exported module object
|
|
twemoji = {
|
|
|
|
|
|
/////////////////////////
|
|
// properties //
|
|
/////////////////////////
|
|
|
|
// default assets url, by default will be Twitter Inc. CDN
|
|
base: 'https://twemoji.maxcdn.com/2/',
|
|
|
|
// default assets file extensions, by default '.png'
|
|
ext: '.png',
|
|
|
|
// default assets/folder size, by default "72x72"
|
|
// available via Twitter CDN: 72
|
|
size: '72x72',
|
|
|
|
// default class name, by default 'emoji'
|
|
className: 'emoji',
|
|
|
|
// basic utilities / helpers to convert code points
|
|
// to JavaScript surrogates and vice versa
|
|
convert: {
|
|
|
|
/**
|
|
* Given an HEX codepoint, returns UTF16 surrogate pairs.
|
|
*
|
|
* @param string generic codepoint, i.e. '1F4A9'
|
|
* @return string codepoint transformed into utf16 surrogates pair,
|
|
* i.e. \uD83D\uDCA9
|
|
*
|
|
* @example
|
|
* twemoji.convert.fromCodePoint('1f1e8');
|
|
* // "\ud83c\udde8"
|
|
*
|
|
* '1f1e8-1f1f3'.split('-').map(twemoji.convert.fromCodePoint).join('')
|
|
* // "\ud83c\udde8\ud83c\uddf3"
|
|
*/
|
|
fromCodePoint: fromCodePoint,
|
|
|
|
/**
|
|
* Given UTF16 surrogate pairs, returns the equivalent HEX codepoint.
|
|
*
|
|
* @param string generic utf16 surrogates pair, i.e. \uD83D\uDCA9
|
|
* @param string optional separator for double code points, default='-'
|
|
* @return string utf16 transformed into codepoint, i.e. '1F4A9'
|
|
*
|
|
* @example
|
|
* twemoji.convert.toCodePoint('\ud83c\udde8\ud83c\uddf3');
|
|
* // "1f1e8-1f1f3"
|
|
*
|
|
* twemoji.convert.toCodePoint('\ud83c\udde8\ud83c\uddf3', '~');
|
|
* // "1f1e8~1f1f3"
|
|
*/
|
|
toCodePoint: toCodePoint
|
|
},
|
|
|
|
|
|
/////////////////////////
|
|
// methods //
|
|
/////////////////////////
|
|
|
|
/**
|
|
* User first: used to remove missing images
|
|
* preserving the original text intent when
|
|
* a fallback for network problems is desired.
|
|
* Automatically added to Image nodes via DOM
|
|
* It could be recycled for string operations via:
|
|
* $('img.emoji').on('error', twemoji.onerror)
|
|
*/
|
|
onerror: function onerror() {
|
|
if (this.parentNode) {
|
|
this.parentNode.replaceChild(createText(this.alt), this);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Main method/logic to generate either <img> tags or HTMLImage nodes.
|
|
* "emojify" a generic text or DOM Element.
|
|
*
|
|
* @overloads
|
|
*
|
|
* String replacement for `innerHTML` or server side operations
|
|
* twemoji.parse(string);
|
|
* twemoji.parse(string, Function);
|
|
* twemoji.parse(string, Object);
|
|
*
|
|
* HTMLElement tree parsing for safer operations over existing DOM
|
|
* twemoji.parse(HTMLElement);
|
|
* twemoji.parse(HTMLElement, Function);
|
|
* twemoji.parse(HTMLElement, Object);
|
|
*
|
|
* @param string|HTMLElement the source to parse and enrich with emoji.
|
|
*
|
|
* string replace emoji matches with <img> tags.
|
|
* Mainly used to inject emoji via `innerHTML`
|
|
* It does **not** parse the string or validate it,
|
|
* it simply replaces found emoji with a tag.
|
|
* NOTE: be sure this won't affect security.
|
|
*
|
|
* HTMLElement walk through the DOM tree and find emoji
|
|
* that are inside **text node only** (nodeType === 3)
|
|
* Mainly used to put emoji in already generated DOM
|
|
* without compromising surrounding nodes and
|
|
* **avoiding** the usage of `innerHTML`.
|
|
* NOTE: Using DOM elements instead of strings should
|
|
* improve security without compromising too much
|
|
* performance compared with a less safe `innerHTML`.
|
|
*
|
|
* @param Function|Object [optional]
|
|
* either the callback that will be invoked or an object
|
|
* with all properties to use per each found emoji.
|
|
*
|
|
* Function if specified, this will be invoked per each emoji
|
|
* that has been found through the RegExp except
|
|
* those follwed by the invariant \uFE0E ("as text").
|
|
* Once invoked, parameters will be:
|
|
*
|
|
* iconId:string the lower case HEX code point
|
|
* i.e. "1f4a9"
|
|
*
|
|
* options:Object all info for this parsing operation
|
|
*
|
|
* variant:char the optional \uFE0F ("as image")
|
|
* variant, in case this info
|
|
* is anyhow meaningful.
|
|
* By default this is ignored.
|
|
*
|
|
* If such callback will return a falsy value instead
|
|
* of a valid `src` to use for the image, nothing will
|
|
* actually change for that specific emoji.
|
|
*
|
|
*
|
|
* Object if specified, an object containing the following properties
|
|
*
|
|
* callback Function the callback to invoke per each found emoji.
|
|
* base string the base url, by default twemoji.base
|
|
* ext string the image extension, by default twemoji.ext
|
|
* size string the assets size, by default twemoji.size
|
|
*
|
|
* @example
|
|
*
|
|
* twemoji.parse("I \u2764\uFE0F emoji!");
|
|
* // I <img class="emoji" draggable="false" alt="❤️" src="/assets/2764.gif"> emoji!
|
|
*
|
|
*
|
|
* twemoji.parse("I \u2764\uFE0F emoji!", function(iconId, options) {
|
|
* return '/assets/' + iconId + '.gif';
|
|
* });
|
|
* // I <img class="emoji" draggable="false" alt="❤️" src="/assets/2764.gif"> emoji!
|
|
*
|
|
*
|
|
* twemoji.parse("I \u2764\uFE0F emoji!", {
|
|
* size: 72,
|
|
* callback: function(iconId, options) {
|
|
* return '/assets/' + options.size + '/' + iconId + options.ext;
|
|
* }
|
|
* });
|
|
* // I <img class="emoji" draggable="false" alt="❤️" src="/assets/72x72/2764.png"> emoji!
|
|
*
|
|
*/
|
|
parse: parse,
|
|
|
|
/**
|
|
* Given a string, invokes the callback argument
|
|
* per each emoji found in such string.
|
|
* This is the most raw version used by
|
|
* the .parse(string) method itself.
|
|
*
|
|
* @param string generic string to parse
|
|
* @param Function a generic callback that will be
|
|
* invoked to replace the content.
|
|
* This calback wil receive standard
|
|
* String.prototype.replace(str, callback)
|
|
* arguments such:
|
|
* callback(
|
|
* rawText, // the emoji match
|
|
* );
|
|
*
|
|
* and others commonly received via replace.
|
|
*/
|
|
replace: replace,
|
|
|
|
/**
|
|
* Simplify string tests against emoji.
|
|
*
|
|
* @param string some text that might contain emoji
|
|
* @return boolean true if any emoji was found, false otherwise.
|
|
*
|
|
* @example
|
|
*
|
|
* if (twemoji.test(someContent)) {
|
|
* console.log("emoji All The Things!");
|
|
* }
|
|
*/
|
|
test: test
|
|
},
|
|
|
|
// used to escape HTML special chars in attributes
|
|
escaper = {
|
|
'&': '&',
|
|
'<': '<',
|
|
'>': '>',
|
|
"'": ''',
|
|
'"': '"'
|
|
},
|
|
|
|
// RegExp based on emoji's official Unicode standards
|
|
// http://www.unicode.org/Public/UNIDATA/EmojiSources.txt
|
|
re = /twemoji/,
|
|
|
|
// used to find HTML special chars in attributes
|
|
rescaper = /[&<>'"]/g,
|
|
|
|
// nodes with type 1 which should **not** be parsed (including lower case svg)
|
|
shouldntBeParsed = /IFRAME|NOFRAMES|NOSCRIPT|SCRIPT|SELECT|STYLE|TEXTAREA|[a-z]/,
|
|
|
|
// just a private shortcut
|
|
fromCharCode = String.fromCharCode;
|
|
|
|
return twemoji;
|
|
|
|
|
|
/////////////////////////
|
|
// private functions //
|
|
// declaration //
|
|
/////////////////////////
|
|
|
|
/**
|
|
* Shortcut to create text nodes
|
|
* @param string text used to create DOM text node
|
|
* @return Node a DOM node with that text
|
|
*/
|
|
function createText(text) {
|
|
return document.createTextNode(text);
|
|
}
|
|
|
|
/**
|
|
* Utility function to escape html attribute text
|
|
* @param string text use in HTML attribute
|
|
* @return string text encoded to use in HTML attribute
|
|
*/
|
|
function escapeHTML(s) {
|
|
return s.replace(rescaper, replacer);
|
|
}
|
|
|
|
/**
|
|
* Default callback used to generate emoji src
|
|
* based on Twitter CDN
|
|
* @param string the emoji codepoint string
|
|
* @param string the default size to use, i.e. "36x36"
|
|
* @return string the image source to use
|
|
*/
|
|
function defaultImageSrcGenerator(icon, options) {
|
|
return ''.concat(options.base, options.size, '/', icon, options.ext);
|
|
}
|
|
|
|
/**
|
|
* Given a generic DOM nodeType 1, walk through all children
|
|
* and store every nodeType 3 (#text) found in the tree.
|
|
* @param Element a DOM Element with probably some text in it
|
|
* @param Array the list of previously discovered text nodes
|
|
* @return Array same list with new discovered nodes, if any
|
|
*/
|
|
function grabAllTextNodes(node, allText) {
|
|
var
|
|
childNodes = node.childNodes,
|
|
length = childNodes.length,
|
|
subnode,
|
|
nodeType;
|
|
while (length--) {
|
|
subnode = childNodes[length];
|
|
nodeType = subnode.nodeType;
|
|
// parse emoji only in text nodes
|
|
if (nodeType === 3) {
|
|
// collect them to process emoji later
|
|
allText.push(subnode);
|
|
}
|
|
// ignore all nodes that are not type 1 or that
|
|
// should not be parsed as script, style, and others
|
|
else if (nodeType === 1 && !shouldntBeParsed.test(subnode.nodeName)) {
|
|
grabAllTextNodes(subnode, allText);
|
|
}
|
|
}
|
|
return allText;
|
|
}
|
|
|
|
/**
|
|
* Used to both remove the possible variant
|
|
* and to convert utf16 into code points.
|
|
* If there is a zero-width-joiner (U+200D), leave the variants in.
|
|
* @param string the raw text of the emoji match
|
|
*/
|
|
function grabTheRightIcon(rawText) {
|
|
// if variant is present as \uFE0F
|
|
return toCodePoint(/\u200D/.test(rawText) ?
|
|
rawText :
|
|
rawText.replace(/\uFE0F/g, '')
|
|
);
|
|
}
|
|
|
|
/**
|
|
* DOM version of the same logic / parser:
|
|
* emojify all found sub-text nodes placing images node instead.
|
|
* @param Element generic DOM node with some text in some child node
|
|
* @param Object options containing info about how to parse
|
|
*
|
|
* .callback Function the callback to invoke per each found emoji.
|
|
* .base string the base url, by default twemoji.base
|
|
* .ext string the image extension, by default twemoji.ext
|
|
* .size string the assets size, by default twemoji.size
|
|
*
|
|
* @return Element same generic node with emoji in place, if any.
|
|
*/
|
|
function parseNode(node, options) {
|
|
var
|
|
allText = grabAllTextNodes(node, []),
|
|
length = allText.length,
|
|
attrib,
|
|
attrname,
|
|
modified,
|
|
fragment,
|
|
subnode,
|
|
text,
|
|
match,
|
|
i,
|
|
index,
|
|
img,
|
|
rawText,
|
|
iconId,
|
|
src;
|
|
while (length--) {
|
|
modified = false;
|
|
fragment = document.createDocumentFragment();
|
|
subnode = allText[length];
|
|
text = subnode.nodeValue;
|
|
i = 0;
|
|
while ((match = re.exec(text))) {
|
|
index = match.index;
|
|
if (index !== i) {
|
|
fragment.appendChild(
|
|
createText(text.slice(i, index))
|
|
);
|
|
}
|
|
rawText = match[0];
|
|
iconId = grabTheRightIcon(rawText);
|
|
i = index + rawText.length;
|
|
src = options.callback(iconId, options);
|
|
if (src) {
|
|
img = new Image();
|
|
img.onerror = options.onerror;
|
|
img.setAttribute('draggable', 'false');
|
|
attrib = options.attributes(rawText, iconId);
|
|
for (attrname in attrib) {
|
|
if (
|
|
attrib.hasOwnProperty(attrname) &&
|
|
// don't allow any handlers to be set + don't allow overrides
|
|
attrname.indexOf('on') !== 0 &&
|
|
!img.hasAttribute(attrname)
|
|
) {
|
|
img.setAttribute(attrname, attrib[attrname]);
|
|
}
|
|
}
|
|
img.className = options.className;
|
|
img.alt = rawText;
|
|
img.src = src;
|
|
modified = true;
|
|
fragment.appendChild(img);
|
|
}
|
|
if (!img) fragment.appendChild(createText(rawText));
|
|
img = null;
|
|
}
|
|
// is there actually anything to replace in here ?
|
|
if (modified) {
|
|
// any text left to be added ?
|
|
if (i < text.length) {
|
|
fragment.appendChild(
|
|
createText(text.slice(i))
|
|
);
|
|
}
|
|
// replace the text node only, leave intact
|
|
// anything else surrounding such text
|
|
subnode.parentNode.replaceChild(fragment, subnode);
|
|
}
|
|
}
|
|
return node;
|
|
}
|
|
|
|
/**
|
|
* String/HTML version of the same logic / parser:
|
|
* emojify a generic text placing images tags instead of surrogates pair.
|
|
* @param string generic string with possibly some emoji in it
|
|
* @param Object options containing info about how to parse
|
|
*
|
|
* .callback Function the callback to invoke per each found emoji.
|
|
* .base string the base url, by default twemoji.base
|
|
* .ext string the image extension, by default twemoji.ext
|
|
* .size string the assets size, by default twemoji.size
|
|
*
|
|
* @return the string with <img tags> replacing all found and parsed emoji
|
|
*/
|
|
function parseString(str, options) {
|
|
return replace(str, function (rawText) {
|
|
var
|
|
ret = rawText,
|
|
iconId = grabTheRightIcon(rawText),
|
|
src = options.callback(iconId, options),
|
|
attrib,
|
|
attrname;
|
|
if (src) {
|
|
// recycle the match string replacing the emoji
|
|
// with its image counter part
|
|
ret = '<img '.concat(
|
|
'class="', options.className, '" ',
|
|
'draggable="false" ',
|
|
// needs to preserve user original intent
|
|
// when variants should be copied and pasted too
|
|
'alt="',
|
|
rawText,
|
|
'"',
|
|
' src="',
|
|
src,
|
|
'"'
|
|
);
|
|
attrib = options.attributes(rawText, iconId);
|
|
for (attrname in attrib) {
|
|
if (
|
|
attrib.hasOwnProperty(attrname) &&
|
|
// don't allow any handlers to be set + don't allow overrides
|
|
attrname.indexOf('on') !== 0 &&
|
|
ret.indexOf(' ' + attrname + '=') === -1
|
|
) {
|
|
ret = ret.concat(' ', attrname, '="', escapeHTML(attrib[attrname]), '"');
|
|
}
|
|
}
|
|
ret = ret.concat('>');
|
|
}
|
|
return ret;
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Function used to actually replace HTML special chars
|
|
* @param string HTML special char
|
|
* @return string encoded HTML special char
|
|
*/
|
|
function replacer(m) {
|
|
return escaper[m];
|
|
}
|
|
|
|
/**
|
|
* Default options.attribute callback
|
|
* @return null
|
|
*/
|
|
function returnNull() {
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Given a generic value, creates its squared counterpart if it's a number.
|
|
* As example, number 36 will return '36x36'.
|
|
* @param any a generic value.
|
|
* @return any a string representing asset size, i.e. "36x36"
|
|
* only in case the value was a number.
|
|
* Returns initial value otherwise.
|
|
*/
|
|
function toSizeSquaredAsset(value) {
|
|
return typeof value === 'number' ?
|
|
value + 'x' + value :
|
|
value;
|
|
}
|
|
|
|
|
|
/////////////////////////
|
|
// exported functions //
|
|
// declaration //
|
|
/////////////////////////
|
|
|
|
function fromCodePoint(codepoint) {
|
|
var code = typeof codepoint === 'string' ?
|
|
parseInt(codepoint, 16) : codepoint;
|
|
if (code < 0x10000) {
|
|
return fromCharCode(code);
|
|
}
|
|
code -= 0x10000;
|
|
return fromCharCode(
|
|
0xD800 + (code >> 10),
|
|
0xDC00 + (code & 0x3FF)
|
|
);
|
|
}
|
|
|
|
function parse(what, how) {
|
|
if (!how || typeof how === 'function') {
|
|
how = {callback: how};
|
|
}
|
|
// if first argument is string, inject html <img> tags
|
|
// otherwise use the DOM tree and parse text nodes only
|
|
return (typeof what === 'string' ? parseString : parseNode)(what, {
|
|
callback: how.callback || defaultImageSrcGenerator,
|
|
attributes: typeof how.attributes === 'function' ? how.attributes : returnNull,
|
|
base: typeof how.base === 'string' ? how.base : twemoji.base,
|
|
ext: how.ext || twemoji.ext,
|
|
size: how.folder || toSizeSquaredAsset(how.size || twemoji.size),
|
|
className: how.className || twemoji.className,
|
|
onerror: how.onerror || twemoji.onerror
|
|
});
|
|
}
|
|
|
|
function replace(text, callback) {
|
|
return String(text).replace(re, callback);
|
|
}
|
|
|
|
function test(text) {
|
|
// IE6 needs a reset before too
|
|
re.lastIndex = 0;
|
|
var result = re.test(text);
|
|
re.lastIndex = 0;
|
|
return result;
|
|
}
|
|
|
|
function toCodePoint(unicodeSurrogates, sep) {
|
|
var
|
|
r = [],
|
|
c = 0,
|
|
p = 0,
|
|
i = 0;
|
|
while (i < unicodeSurrogates.length) {
|
|
c = unicodeSurrogates.charCodeAt(i++);
|
|
if (p) {
|
|
r.push((0x10000 + ((p - 0xD800) << 10) + (c - 0xDC00)).toString(16));
|
|
p = 0;
|
|
} else if (0xD800 <= c && c <= 0xDBFF) {
|
|
p = c;
|
|
} else {
|
|
r.push(c.toString(16));
|
|
}
|
|
}
|
|
return r.join(sep || '-');
|
|
}
|
|
|
|
}.toString()
|
|
// drop current indentation
|
|
.replace(/^ /gm, '')
|
|
// add the RegExp in the right place
|
|
.replace('re = /twemoji/', 're = /' + re + '/g')
|
|
// add the full license
|
|
.replace('/*! (C) Twitter Inc. */',
|
|
'/*! (C) Twitter Inc. *//*\n' +
|
|
fs.readFileSync(path.join(__dirname, '../../', 'LICENSE')).toString().replace(
|
|
/^./gm, ' '
|
|
) +
|
|
'\n */'
|
|
) + '());');
|
|
}
|