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import installCustomElements from 'document-register-element';
import emojiMap from 'emojis/digests.json';
import emojiAliases from 'emojis/aliases.json';
import { getUnicodeSupportMap } from './gl_emoji/unicode_support_map';
import { isEmojiUnicodeSupported } from './gl_emoji/is_emoji_unicode_supported';
installCustomElements(window);
const generatedUnicodeSupportMap = getUnicodeSupportMap();
function emojiImageTag(name, src) {
return `<img class="emoji" title=":${name}:" alt=":${name}:" src="${src}" width="20" height="20" align="absmiddle" />`;
}
function assembleFallbackImageSrc(inputName) {
let name = Object.prototype.hasOwnProperty.call(emojiAliases, inputName) ?
emojiAliases[inputName] : inputName;
let emojiInfo = emojiMap[name];
// Fallback to question mark for unknown emojis
if (!emojiInfo) {
name = 'grey_question';
emojiInfo = emojiMap[name];
}
const fallbackImageSrc = `${gon.asset_host || ''}${gon.relative_url_root || ''}/assets/emoji/${name}-${emojiInfo.digest}.png`;
return fallbackImageSrc;
}
const glEmojiTagDefaults = {
sprite: false,
forceFallback: false,
};
function glEmojiTag(inputName, options) {
const opts = Object.assign({}, glEmojiTagDefaults, options);
let name = Object.prototype.hasOwnProperty.call(emojiAliases, inputName) ?
emojiAliases[inputName] : inputName;
let emojiInfo = emojiMap[name];
// Fallback to question mark for unknown emojis
if (!emojiInfo) {
name = 'grey_question';
emojiInfo = emojiMap[name];
}
const fallbackImageSrc = assembleFallbackImageSrc(name);
const fallbackSpriteClass = `emoji-${name}`;
const classList = [];
if (opts.forceFallback && opts.sprite) {
classList.push('emoji-icon');
classList.push(fallbackSpriteClass);
}
const classAttribute = classList.length > 0 ? `class="${classList.join(' ')}"` : '';
const fallbackSpriteAttribute = opts.sprite ? `data-fallback-sprite-class="${fallbackSpriteClass}"` : '';
let contents = emojiInfo.moji;
if (opts.forceFallback && !opts.sprite) {
contents = emojiImageTag(name, fallbackImageSrc);
}
return `
<gl-emoji
${classAttribute}
data-name="${name}"
data-fallback-src="${fallbackImageSrc}"
${fallbackSpriteAttribute}
data-unicode-version="${emojiInfo.unicodeVersion}"
title="${emojiInfo.description}"
>
${contents}
</gl-emoji>
`;
}
function installGlEmojiElement() {
const GlEmojiElementProto = Object.create(HTMLElement.prototype);
GlEmojiElementProto.createdCallback = function createdCallback() {
const emojiUnicode = this.textContent.trim();
const {
name,
unicodeVersion,
fallbackSrc,
fallbackSpriteClass,
} = this.dataset;
const isEmojiUnicode = this.childNodes && Array.prototype.every.call(
this.childNodes,
childNode => childNode.nodeType === 3,
);
const hasImageFallback = fallbackSrc && fallbackSrc.length > 0;
const hasCssSpriteFalback = fallbackSpriteClass && fallbackSpriteClass.length > 0;
if (
isEmojiUnicode &&
!isEmojiUnicodeSupported(generatedUnicodeSupportMap, emojiUnicode, unicodeVersion)
) {
// CSS sprite fallback takes precedence over image fallback
if (hasCssSpriteFalback) {
// IE 11 doesn't like adding multiple at once :(
this.classList.add('emoji-icon');
this.classList.add(fallbackSpriteClass);
} else if (hasImageFallback) {
this.innerHTML = emojiImageTag(name, fallbackSrc);
} else {
const src = assembleFallbackImageSrc(name);
this.innerHTML = emojiImageTag(name, src);
}
}
};
document.registerElement('gl-emoji', {
prototype: GlEmojiElementProto,
});
}
export {
installGlEmojiElement,
glEmojiTag,
emojiImageTag,
};
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