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import {
initEmojiMap,
getEmojiInfo,
emojiFallbackImageSrc,
emojiImageTag,
FALLBACK_EMOJI_KEY,
} from '../emoji';
import isEmojiUnicodeSupported from '../emoji/support';
class GlEmoji extends HTMLElement {
connectedCallback() {
this.initialize();
}
initialize() {
let emojiUnicode = this.textContent.trim();
const { fallbackSpriteClass, fallbackSrc } = this.dataset;
let { name, unicodeVersion } = this.dataset;
return initEmojiMap().then(() => {
if (!unicodeVersion) {
const emojiInfo = getEmojiInfo(name);
if (emojiInfo) {
if (name !== emojiInfo.name) {
if (emojiInfo.name === FALLBACK_EMOJI_KEY && this.innerHTML) {
return; // When fallback emoji is used, but there is a <img> provided, use the <img> instead
}
({ name } = emojiInfo);
this.dataset.name = emojiInfo.name;
}
unicodeVersion = emojiInfo.u;
this.dataset.unicodeVersion = unicodeVersion;
emojiUnicode = emojiInfo.e;
this.innerHTML = emojiInfo.e;
this.title = emojiInfo.d;
}
}
const isEmojiUnicode =
this.childNodes &&
Array.prototype.every.call(this.childNodes, (childNode) => childNode.nodeType === 3);
if (
emojiUnicode &&
isEmojiUnicode &&
!isEmojiUnicodeSupported(emojiUnicode, unicodeVersion)
) {
const hasImageFallback = fallbackSrc && fallbackSrc.length > 0;
const hasCssSpriteFallback = fallbackSpriteClass && fallbackSpriteClass.length > 0;
// CSS sprite fallback takes precedence over image fallback
if (hasCssSpriteFallback) {
if (!gon.emoji_sprites_css_added && gon.emoji_sprites_css_path) {
const emojiSpriteLinkTag = document.createElement('link');
emojiSpriteLinkTag.setAttribute('rel', 'stylesheet');
emojiSpriteLinkTag.setAttribute('href', gon.emoji_sprites_css_path);
document.head.appendChild(emojiSpriteLinkTag);
gon.emoji_sprites_css_added = true;
}
// 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 = emojiFallbackImageSrc(name);
this.innerHTML = emojiImageTag(name, src);
}
}
});
}
}
export default function installGlEmojiElement() {
if (!customElements.get('gl-emoji')) {
customElements.define('gl-emoji', GlEmoji);
}
}
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