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Copy pathkeyframes.ts
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491 lines (415 loc) · 11.8 KB
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import {
KeyframeAnimationOptions,
RuleCache,
PublicCssStyleKeys,
KeyframeAnimationOptionArray,
KeyframeCallbacks,
KeyframeEventName,
KeyframeEventListenerName,
KeyframeAnimationObject,
KeyframeObject,
KeyframeOptions
} from "./types/keyframes";
import addPx from "add-px-to-style";
import hyphenate from "hyphenate-style-name";
const wait = (): Promise<void> =>
new Promise(accept => {
requestAnimationFrame(() => {
accept();
});
});
export const isBrowser = typeof window !== "undefined";
let keyframesSheet: CSSStyleSheet;
if (isBrowser) {
const styleElem = document.createElement("style");
styleElem.setAttribute("id", "keyframesjs-stylesheet");
document.head.appendChild(styleElem);
keyframesSheet = styleElem.sheet as CSSStyleSheet;
}
const clone = (input: KeyframeAnimationOptions): KeyframeAnimationOptions => {
if (Array.isArray(input)) {
return [...input];
} else if (typeof input === "object") {
return { ...input };
} else {
return input.toString();
}
};
const voidFunction = () => {
return;
};
const defaultCallbacks: KeyframeCallbacks = {
onStart: voidFunction,
onBeforeStart: voidFunction,
onIteration: voidFunction,
onEnd: voidFunction,
onQueueComplete: voidFunction,
onCancel: voidFunction
};
const objToCss = (obj: CSSStyleDeclaration) => {
if (!Object.keys(obj).length) {
return "";
}
let result = "";
for (const key in obj) {
result += `${hyphenate(key)}:${addPx(key, obj[key])};`;
}
return result;
};
class Keyframes {
static sheet: CSSStyleSheet = keyframesSheet;
static rules: string[] = [];
static ruleCache: RuleCache = {};
playing = false;
previousCancel: VoidFunction = voidFunction;
debug = false;
frozenStyles: PublicCssStyleKeys[];
mountedElement: HTMLElement;
queueStore: KeyframeAnimationOptionArray = [];
callbacks: KeyframeCallbacks = defaultCallbacks;
animationstartListener: EventListener = voidFunction;
animationendListener: EventListener = voidFunction;
animationiterationListener: EventListener = voidFunction;
animationcancelListener: EventListener = voidFunction;
constructor(elem: HTMLElement, debug = false) {
this.mountedElement = elem;
this.frozenStyles = [];
this.debug = debug;
}
static isSupported() {
return document.body.style.animationName !== undefined;
}
freeze() {
const ruleCache =
Keyframes.ruleCache[this.mountedElement.style.animationName];
if (ruleCache) {
const computedStyle = { ...getComputedStyle(this.mountedElement) };
ruleCache.forEach(rule => {
this.mountedElement.style[rule] = computedStyle[rule] as any;
});
this.frozenStyles = [...new Set(this.frozenStyles.concat(ruleCache))];
}
}
unfreeze() {
if (this.frozenStyles.length) {
this.frozenStyles.forEach(rule => {
this.mountedElement.style[rule] = "" as any;
});
this.frozenStyles = [];
}
}
async reset() {
this.log("reset");
this.playing = false;
this.removeEvents();
this.mountedElement.style.animationPlayState = "running";
this.mountedElement.style.animation = "none";
await wait();
return this;
}
pause() {
this.mountedElement.style.animationPlayState = "paused";
return this;
}
resume() {
this.mountedElement.style.animationPlayState = "running";
return this;
}
play(
animationOptions: KeyframeAnimationOptions,
callbacks: KeyframeCallbacks
) {
this.log("play", animationOptions);
const {
onBeforeStart = null,
onStart = null,
onIteration = null,
onEnd = null,
onCancel = null
} = callbacks || {};
if (this.playing === true) {
this.log("cancelled");
if (this.previousCancel) {
this.queueStore = [];
this.previousCancel();
}
}
if (onCancel) {
this.previousCancel = onCancel;
}
if (
this.mountedElement.style.animationName ===
this.getAnimationName(animationOptions)
) {
this.freeze();
requestAnimationFrame(async () => {
await this.reset();
this.play(animationOptions, callbacks);
this.unfreeze();
});
return this;
}
this.playing = true;
let animationCount = Array.isArray(animationOptions)
? animationOptions.length
: 1;
const animationcss = Keyframes.playCSS(animationOptions);
const addEvent = (
type: KeyframeEventName,
eventCallback: EventListener
) => {
const listenerName: KeyframeEventListenerName = `${type}Listener` as KeyframeEventListenerName;
this.mountedElement.removeEventListener(type, this[listenerName]);
this[listenerName] = eventCallback;
this.mountedElement.addEventListener(type, this[listenerName]);
};
this.log("onBeforeStart");
if (onBeforeStart) {
onBeforeStart();
}
this.mountedElement.style.animationPlayState = "running";
this.mountedElement.style.animation = animationcss;
addEvent("animationiteration", e => {
this.log("animationiteration", e);
if (onIteration) {
onIteration(e);
}
});
addEvent("animationend", e => {
animationCount -= 1;
if (!animationCount) {
this.log("ended", e);
this.playing = false;
if (onEnd && !animationCount) {
onEnd(e);
}
}
});
addEvent("animationstart", e => {
this.log("onStart", e);
if (onStart) {
onStart(e);
}
});
return this;
}
playNext() {
const animationOption = this.queueStore[this.queueStore.length - 1];
if (animationOption) {
this.log("playNext", animationOption);
} else {
this.log("Queue Complete");
}
if (animationOption) {
this.play(animationOption, {
onEnd: e => {
this.queueStore.pop();
if (this.callbacks.onEnd) {
this.callbacks.onEnd(e);
}
this.playNext();
},
onCancel: this.callbacks.onCancel,
onIteration: this.callbacks.onIteration
});
} else if (this.callbacks.onQueueComplete) {
this.callbacks.onQueueComplete();
}
}
removeEvents() {
this.log("events cleared");
this.mountedElement.removeEventListener(
"animationiteration",
this.animationiterationListener
);
this.mountedElement.removeEventListener(
"animationend",
this.animationendListener
);
this.mountedElement.removeEventListener(
"animationstart",
this.animationstartListener
);
return this;
}
updateCallbacks(callbacks?: KeyframeCallbacks) {
if (callbacks) {
this.callbacks = {
...this.callbacks,
...callbacks
};
}
}
queue(
animationOptions: KeyframeAnimationOptions,
callbacks?: KeyframeCallbacks
) {
const currentQueueLength = this.queueStore.length;
this.updateCallbacks({ ...defaultCallbacks, ...callbacks });
const _animationOptions = clone(animationOptions);
if (Array.isArray(_animationOptions)) {
this.queueStore = _animationOptions.reverse().concat(this.queueStore);
} else {
this.queueStore.unshift(_animationOptions as (string | KeyframeAnimationObject));
}
this.log("queued", animationOptions, currentQueueLength);
if (!currentQueueLength) {
requestAnimationFrame(async () => {
await this.reset();
this.playNext();
});
} else if (!this.playing) {
this.playNext();
}
return this;
}
// Deprecating
chain(
animationOptions: KeyframeAnimationOptions,
callbacks?: KeyframeCallbacks
) {
console.warn("Keyframes: .chain is deprecated, please use .queue");
this.queue(animationOptions, callbacks);
return this;
}
async resetQueue() {
this.log("resetQueue");
await wait();
this.removeEvents();
this.queueStore = [];
await this.reset();
return this;
}
async loop(
animationOptions: KeyframeAnimationOptions,
callbacks: KeyframeCallbacks = {}
) {
this.log("loop", animationOptions);
await this.resetQueue();
const populateQueue = () => {
this.queue(animationOptions, {
...callbacks,
onQueueComplete: () => populateQueue()
});
};
populateQueue();
return this;
}
getAnimationName(animationObject: KeyframeAnimationOptions): string {
if (Array.isArray(animationObject)) {
return animationObject.map(o => this.getAnimationName(o)).join(", ");
}
if (typeof animationObject === "string") {
return animationObject.split(" ")[0];
}
return animationObject.name;
}
static playCSS(animationOptions: KeyframeAnimationOptions): string {
const animObjToStr = (obj: KeyframeAnimationObject): string => {
const newObj = {
duration: "0s",
timingFunction: "ease",
delay: "0s",
iterationCount: 1,
direction: "normal",
fillMode: "forwards",
...obj
};
return [
newObj.name,
newObj.duration,
newObj.timingFunction,
newObj.delay,
newObj.iterationCount,
newObj.direction,
newObj.fillMode
].join(" ");
};
if (Array.isArray(animationOptions)) {
const animationOptionsStrings = [];
for (let i = 0; i < animationOptions.length; i += 1) {
const option = animationOptions[i];
animationOptionsStrings.push(
typeof option === "string" ? option : animObjToStr(option)
);
}
return animationOptionsStrings.join(", ");
}
if (typeof animationOptions === "string") {
return animationOptions;
}
return animObjToStr(animationOptions);
}
static generateCSS(frameData: KeyframeObject): string {
let css = `@keyframes ${frameData.name} {`;
for (const key in frameData) {
if (key !== "name" && key !== "media" && key !== "complete") {
const cssRuleObject = objToCss(frameData[key] as CSSStyleDeclaration);
css += `${key} {${cssRuleObject}}`;
}
}
css += "}";
if (frameData.media) {
css = `@media ${frameData.media}{${css}}`;
}
return css;
}
static generate(frameData: KeyframeObject) {
this.addToRuleCache(frameData);
const css = this.generateCSS(frameData);
const oldFrameIndex = Keyframes.rules.indexOf(frameData.name);
if (oldFrameIndex > -1) {
Keyframes.sheet.deleteRule(oldFrameIndex);
Keyframes.rules.splice(oldFrameIndex, 1);
}
const ruleIndex = (Keyframes.sheet.cssRules || Keyframes.sheet.rules)
.length;
Keyframes.sheet.insertRule(css, ruleIndex);
Keyframes.rules[ruleIndex] = frameData.name;
}
static define(frameOptions: KeyframeOptions) {
if (Array.isArray(frameOptions)) {
for (let i = 0; i < frameOptions.length; i += 1) {
this.generate(frameOptions[i]);
}
} else {
this.generate(frameOptions);
}
}
static defineCSS(frameOptions: KeyframeOptions) {
if (Array.isArray(frameOptions)) {
let css = "";
for (let i = 0; i < frameOptions.length; i += 1) {
css += this.generateCSS(frameOptions[i]);
}
return css;
}
return this.generateCSS(frameOptions);
}
static clearRules = () => {
Keyframes.rules = [];
while (Keyframes.sheet.cssRules.length) {
Keyframes.sheet.deleteRule(0);
}
};
static addToRuleCache(frameData: KeyframeObject) {
if (!this.ruleCache[frameData.name]) {
const rules: PublicCssStyleKeys[] = Object.values(frameData)
.filter(v => typeof v === "object")
.map(v => Object.keys(v) as PublicCssStyleKeys[])
.flat();
this.ruleCache[frameData.name] = [...new Set(rules)];
}
}
log(msg: string, ...detail: any) {
if (this.debug) {
console.log(msg, ...detail);
}
}
}
if (isBrowser) {
(window as any).Keyframes = Keyframes;
}
export * from "./pathfinder";
export * from "./spritesheet";
export default Keyframes;