124 lines
3.2 KiB
JavaScript
124 lines
3.2 KiB
JavaScript
// Emoji zoom-in functionality.
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class EmojiTooltip extends HTMLElement {
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constructor(emoji, { onClosed }) {
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super();
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this.emoji = emoji;
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this.onClosed = onClosed;
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}
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connectedCallback() {
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this.role = "tooltip";
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this.image = new Image();
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this.image.src = this.emoji.src;
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this.description = document.createElement("p");
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this.description.textContent = `${this.emoji.emojiName}`;
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let emojiBoundingBox = this.emoji.getBoundingClientRect();
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this.style.left = `${emojiBoundingBox.left + emojiBoundingBox.width / 2}px`;
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this.style.top = `calc(${emojiBoundingBox.top}px + 1.5em)`;
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this.fullyOpaque = false;
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this.addEventListener("transitionend", event => {
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if (event.propertyName == "opacity") {
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this.fullyOpaque = !this.fullyOpaque;
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if (!this.fullyOpaque) {
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this.onClosed();
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}
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}
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});
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// Timeout is zero because we just want to execute this later, to be definitely sure
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// the transition plays out.
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setTimeout(() => this.classList.add("transitioned-in"), 0);
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this.appendChild(this.image);
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this.appendChild(this.description);
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}
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close() {
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this.classList.remove("transitioned-in");
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}
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}
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customElements.define("th-emoji-tooltip", EmojiTooltip);
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let emojiTooltips = null;
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class EmojiTooltips extends HTMLElement {
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constructor() {
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super();
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this.tooltips = new Set();
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this.abortController = new AbortController();
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}
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connectedCallback() {
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emojiTooltips = this;
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addEventListener(
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"wheel",
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event => emojiTooltips.closeTooltips(event),
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{ signal: this.abortController.signal },
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);
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}
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disconnectedCallback() {
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this.abortController.abort();
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}
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openTooltip(emoji) {
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let tooltip = new EmojiTooltip(emoji, {
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onClosed: () => {
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this.removeChild(tooltip);
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this.tooltips.delete(tooltip);
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},
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});
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this.appendChild(tooltip);
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this.tooltips.add(tooltip);
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return tooltip;
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}
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closeTooltip(tooltip) {
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tooltip.close();
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}
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closeTooltips() {
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for (let tooltip of this.tooltips) {
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console.log("close", this);
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tooltip.close();
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}
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}
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}
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customElements.define("th-emoji-tooltips", EmojiTooltips);
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class Emoji extends HTMLImageElement {
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connectedCallback() {
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this.emojiName = this.title;
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// title makes the browser add a tooltip. We replace browser tooltips with our own,
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// so remove the title.
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this.title = "";
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this.addEventListener("mouseenter", () => this.openTooltip());
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this.addEventListener("mouseleave", () => this.closeTooltip());
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this.addEventListener("scroll", () => this.closeTooltip());
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}
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openTooltip() {
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this.tooltip = emojiTooltips.openTooltip(this);
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}
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closeTooltip() {
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emojiTooltips.closeTooltip(this.tooltip);
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this.tooltip = null;
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}
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}
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customElements.define("th-emoji", Emoji, { extends: "img" });
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