Fix emojify() by generating a mapping to existing Twemoji files (#5080)

A new rake task emojis:generate downloads a full list of valid
unicode sequences from unicode.org and checks it against existing
Twemoji files, finally generating a map from each sequence to the
existing file (e.g. when there's multiple ways an emoji can be
expressed). The map is dumped into app/javascript/mastodon/emoji_map.json

That file is loaded by emojione_light.js (now a misnomer) which
decorates it further with shortcodes taken from emoji-mart's index.
This commit is contained in:
Eugen Rochko 2017-09-25 18:36:33 +02:00 committed by GitHub
parent 98936bfcdf
commit 510df0ac55
4 changed files with 95 additions and 13 deletions

File diff suppressed because one or more lines are too long

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@ -1,13 +1,38 @@
// @preval
// Force tree shaking on emojione by exposing just a subset of its functionality
// http://www.unicode.org/Public/emoji/5.0/emoji-test.txt
const emojione = require('emojione');
const mappedUnicode = emojione.mapUnicodeToShort();
const emojis = require('./emoji_map.json');
const { emojiIndex } = require('emoji-mart');
const excluded = ['®', '©', '™'];
const skins = ['🏻', '🏼', '🏽', '🏾', '🏿'];
const shortcodeMap = {};
module.exports.unicodeMapping = Object.keys(emojione.jsEscapeMap)
.filter(c => !excluded.includes(c))
.map(unicodeStr => [unicodeStr, mappedUnicode[emojione.jsEscapeMap[unicodeStr]]])
.map(([unicodeStr, shortCode]) => ({ [unicodeStr]: [emojione.emojioneList[shortCode].fname.replace(/^0+/g, ''), shortCode.slice(1, shortCode.length - 1)] }))
.reduce((x, y) => Object.assign(x, y), { });
Object.keys(emojiIndex.emojis).forEach(key => {
shortcodeMap[emojiIndex.emojis[key].native] = emojiIndex.emojis[key].id;
});
const stripModifiers = unicode => {
skins.forEach(tone => {
unicode = unicode.replace(tone, '');
});
return unicode;
};
Object.keys(emojis).forEach(key => {
if (excluded.includes(key)) {
delete emojis[key];
return;
}
const normalizedKey = stripModifiers(key);
let shortcode = shortcodeMap[normalizedKey];
if (!shortcode) {
shortcode = shortcodeMap[normalizedKey + '\uFE0F'];
}
emojis[key] = [emojis[key], shortcode];
});
module.exports.unicodeMapping = emojis;

56
lib/tasks/emojis.rake Normal file
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@ -0,0 +1,56 @@
# frozen_string_literal: true
def codepoints_to_filename(codepoints)
codepoints.downcase.gsub(/\A[0]+/, '').tr(' ', '-')
end
def codepoints_to_unicode(codepoints)
if codepoints.include?(' ')
codepoints.split(' ').map(&:hex).pack('U*')
else
[codepoints.hex].pack('U')
end
end
namespace :emojis do
desc 'Generate a unicode to filename mapping'
task :generate do
source = 'http://www.unicode.org/Public/emoji/5.0/emoji-test.txt'
codes = []
dest = Rails.root.join('app', 'javascript', 'mastodon', 'emoji_map.json')
puts "Downloading emojos from source... (#{source})"
HTTP.get(source).to_s.split("\n").each do |line|
next if line.start_with? '#'
parts = line.split(';').map(&:strip)
next if parts.size < 2
codes << [parts[0], parts[1].start_with?('fully-qualified')]
end
grouped_codes = codes.reduce([]) do |agg, current|
if current[1]
agg << [current[0]]
else
agg.last << current[0]
agg
end
end
existence_maps = grouped_codes.map { |c| c.map { |cc| [cc, File.exist?(Rails.root.join('public', 'emoji', codepoints_to_filename(cc) + '.svg'))] }.to_h }
map = {}
existence_maps.each do |group|
existing_one = group.key(true)
group.each_key do |key|
map[codepoints_to_unicode(key)] = codepoints_to_filename(existing_one)
end
end
map = map.sort { |a, b| a[0].size <=> b[0].size }.to_h
File.write(dest, Oj.dump(map))
puts "Wrote emojo to destination! (#{dest})"
end
end

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@ -22,10 +22,10 @@ describe('emojify', () => {
it('does unicode', () => {
expect(emojify('\uD83D\uDC69\u200D\uD83D\uDC69\u200D\uD83D\uDC66\u200D\uD83D\uDC66')).to.equal(
'<img draggable="false" class="emojione" alt="👩‍👩‍👦‍👦" title=":family_wwbb:" src="/emoji/1f469-1f469-1f466-1f466.svg" />');
expect(emojify('\uD83D\uDC68\uD83D\uDC69\uD83D\uDC67\uD83D\uDC67')).to.equal(
'<img draggable="false" class="emojione" alt="👨👩👧👧" title=":family_mwgg:" src="/emoji/1f468-1f469-1f467-1f467.svg" />');
expect(emojify('\uD83D\uDC69\uD83D\uDC69\uD83D\uDC66')).to.equal('<img draggable="false" class="emojione" alt="👩👩👦" title=":family_wwb:" src="/emoji/1f469-1f469-1f466.svg" />');
'<img draggable="false" class="emojione" alt="👩‍👩‍👦‍👦" title=":woman-woman-boy-boy:" src="/emoji/1f469-200d-1f469-200d-1f466-200d-1f466.svg" />');
expect(emojify('👨‍👩‍👧‍👧')).to.equal(
'<img draggable="false" class="emojione" alt="👨‍👩‍👧‍👧" title=":man-woman-girl-girl:" src="/emoji/1f468-200d-1f469-200d-1f467-200d-1f467.svg" />');
expect(emojify('👩‍👩‍👦')).to.equal('<img draggable="false" class="emojione" alt="👩‍👩‍👦" title=":woman-woman-boy:" src="/emoji/1f469-200d-1f469-200d-1f466.svg" />');
expect(emojify('\u2757')).to.equal(
'<img draggable="false" class="emojione" alt="❗" title=":exclamation:" src="/emoji/2757.svg" />');
});