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| (function onekoHome() {
const prefersReducedMotion = window.matchMedia("(prefers-reduced-motion: reduce)");
const coarsePointer = window.matchMedia("(pointer: coarse)");
const header = document.querySelector(".home-info .entry-header h1");
if (prefersReducedMotion.matches || coarsePointer.matches || !header) {
return;
}
let headerAnchor = header.querySelector(".oneko-title-anchor");
if (!headerAnchor) {
headerAnchor = document.createElement("span");
headerAnchor.className = "oneko-title-anchor";
headerAnchor.style.display = "inline-block";
while (header.firstChild) {
headerAnchor.appendChild(header.firstChild);
}
header.appendChild(headerAnchor);
}
const currentScript = document.currentScript;
const spriteUrl =
currentScript && currentScript.dataset.onekoGif
? currentScript.dataset.onekoGif
: "/hugo-neko/oneko.gif";
const nekoEl = document.createElement("div");
let resizeObserver = null;
let frameCount = 0;
let idleTime = 0;
let idleAnimation = "sleeping";
let idleAnimationFrame = 0;
let lastFrameTimestamp = 0;
let sleeping = true;
let justAwake = false;
let mousePosX = 0;
let mousePosY = 0;
let nekoPosX = 32;
let nekoPosY = 32;
const nekoSpeed = 10;
const spriteSets = {
idle: [[-3, -3]],
alert: [[-7, -3]],
scratchSelf: [
[-5, 0],
[-6, 0],
[-7, 0],
],
scratchWallN: [
[0, 0],
[0, -1],
],
scratchWallS: [
[-7, -1],
[-6, -2],
],
scratchWallE: [
[-2, -2],
[-2, -3],
],
scratchWallW: [
[-4, 0],
[-4, -1],
],
tired: [[-3, -2]],
sleeping: [
[-2, 0],
[-2, -1],
],
N: [
[-1, -2],
[-1, -3],
],
NE: [
[0, -2],
[0, -3],
],
E: [
[-3, 0],
[-3, -1],
],
SE: [
[-5, -1],
[-5, -2],
],
S: [
[-6, -3],
[-7, -2],
],
SW: [
[-5, -3],
[-6, -1],
],
W: [
[-4, -2],
[-4, -3],
],
NW: [
[-1, 0],
[-1, -1],
],
};
const clamp = (value, min, max) => Math.min(Math.max(value, min), max);
const placeBesideHeader = () => {
const headerRect = headerAnchor.getBoundingClientRect();
const preferredX = headerRect.right + 10;
const preferredY = headerRect.bottom - 24 + window.scrollY;
nekoPosX = clamp(preferredX, 16, document.documentElement.clientWidth - 16);
nekoPosY = Math.max(16, preferredY);
nekoEl.style.left = `${nekoPosX - 16}px`;
nekoEl.style.top = `${nekoPosY - 16}px`;
};
const setSprite = (name, frame) => {
const sprite = spriteSets[name][frame % spriteSets[name].length];
nekoEl.style.backgroundPosition = `${sprite[0] * 32}px ${sprite[1] * 32}px`;
};
const resetIdleAnimation = () => {
idleAnimation = null;
idleAnimationFrame = 0;
};
const idle = () => {
idleTime += 1;
if (
idleTime > 10 &&
Math.floor(Math.random() * 200) === 0 &&
idleAnimation == null
) {
const availableIdleAnimations = ["sleeping", "scratchSelf"];
if (nekoPosX < 32) {
availableIdleAnimations.push("scratchWallW");
}
if (nekoPosY < 32) {
availableIdleAnimations.push("scratchWallN");
}
if (nekoPosX > window.innerWidth - 32) {
availableIdleAnimations.push("scratchWallE");
}
if (nekoPosY > window.innerHeight - 32) {
availableIdleAnimations.push("scratchWallS");
}
idleAnimation =
availableIdleAnimations[
Math.floor(Math.random() * availableIdleAnimations.length)
];
}
switch (idleAnimation) {
case "sleeping":
if (idleAnimationFrame < 8 && !sleeping) {
setSprite("tired", 0);
break;
}
setSprite("sleeping", Math.floor(idleAnimationFrame / 4));
if (idleAnimationFrame > 192 && !sleeping) {
resetIdleAnimation();
}
break;
case "scratchWallN":
case "scratchWallS":
case "scratchWallE":
case "scratchWallW":
case "scratchSelf":
setSprite(idleAnimation, idleAnimationFrame);
if (idleAnimationFrame > 9) {
resetIdleAnimation();
}
break;
default:
setSprite("idle", 0);
return;
}
idleAnimationFrame += 1;
};
const wakeUp = () => {
sleeping = false;
justAwake = true;
idleAnimation = null;
idleAnimationFrame = 0;
idleTime = 999;
nekoPosY -= window.scrollY;
nekoPosX = clamp(nekoPosX, 16, window.innerWidth - 16);
nekoPosY = clamp(nekoPosY, 16, window.innerHeight - 16);
nekoEl.style.left = `${nekoPosX - 16}px`;
nekoEl.style.top = `${nekoPosY - 16}px`;
nekoEl.style.position = "fixed";
nekoEl.style.pointerEvents = "none";
nekoEl.style.cursor = "default";
if (resizeObserver) {
resizeObserver.disconnect();
}
};
const frame = () => {
frameCount += 1;
const diffX = nekoPosX - mousePosX;
const diffY = nekoPosY - mousePosY;
const distance = Math.sqrt(diffX ** 2 + diffY ** 2);
if (!justAwake && (distance < nekoSpeed || distance < 48 || sleeping)) {
idle();
return;
}
idleAnimation = null;
idleAnimationFrame = 0;
if (idleTime > 1) {
setSprite("alert", 0);
idleTime = Math.min(idleTime, 7);
idleTime -= 1;
return;
}
justAwake = false;
let direction = diffY / distance > 0.5 ? "N" : "";
direction += diffY / distance < -0.5 ? "S" : "";
direction += diffX / distance > 0.5 ? "W" : "";
direction += diffX / distance < -0.5 ? "E" : "";
setSprite(direction, frameCount);
nekoPosX -= (diffX / distance) * nekoSpeed;
nekoPosY -= (diffY / distance) * nekoSpeed;
nekoPosX = clamp(nekoPosX, 16, window.innerWidth - 16);
nekoPosY = clamp(nekoPosY, 16, window.innerHeight - 16);
nekoEl.style.left = `${nekoPosX - 16}px`;
nekoEl.style.top = `${nekoPosY - 16}px`;
};
const onAnimationFrame = (timestamp) => {
if (!nekoEl.isConnected) {
return;
}
if (!lastFrameTimestamp) {
lastFrameTimestamp = timestamp;
}
if (timestamp - lastFrameTimestamp > 100) {
lastFrameTimestamp = timestamp;
frame();
}
window.requestAnimationFrame(onAnimationFrame);
};
nekoEl.id = "oneko";
nekoEl.ariaHidden = true;
nekoEl.style.width = "32px";
nekoEl.style.height = "32px";
nekoEl.style.position = "absolute";
nekoEl.style.backgroundImage = `url(${spriteUrl})`;
nekoEl.style.backgroundRepeat = "no-repeat";
nekoEl.style.imageRendering = "pixelated";
nekoEl.style.cursor = "pointer";
nekoEl.style.zIndex = "2147483647";
document.body.appendChild(nekoEl);
placeBesideHeader();
document.addEventListener(
"mousemove",
(event) => {
mousePosX = event.clientX;
mousePosY = event.clientY;
},
{ passive: true },
);
document.addEventListener(
"scroll",
() => {
if (sleeping) {
placeBesideHeader();
}
},
{ passive: true },
);
window.addEventListener(
"resize",
() => {
if (sleeping) {
placeBesideHeader();
}
},
{ passive: true },
);
if ("ResizeObserver" in window) {
resizeObserver = new ResizeObserver(() => {
if (sleeping) {
placeBesideHeader();
}
});
resizeObserver.observe(headerAnchor);
}
nekoEl.addEventListener("click", wakeUp, { once: true });
window.requestAnimationFrame(onAnimationFrame);
})();
|
