@egjs/axes
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A module used to change the information of user action entered by various input devices such as touch screen or mouse into the logical virtual coordinates. You can easily create a UI that responds to user actions.
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<a href="../../index.html">All files</a> / <a href="index.html">src/animation</a> AnimationManager.ts
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">import {
getInsidePosition,
isCircularable,
getCirculatedPos,
getDuration,
} from "../Coordinate";
import { Axis, AxisManager } from "../AxisManager";
import { InterruptManager } from "../InterruptManager";
import { EventManager, ChangeEventOption } from "../EventManager";
import {
requestAnimationFrame,
cancelAnimationFrame,
map,
every,
filter,
equal,
roundNumber,
getDecimalPlace,
inversePow,
} from "../utils";
import { AxesOption } from "../Axes";
import {
AnimationParam,
ObjectInterface,
UpdateAnimationOption,
} from "../types";
export interface AnimationState {
pos: Axis;
easingPer: number;
finished: boolean;
}
const clamp = (value: number, min: number, max: number): number => {
return Math.max(Math.min(value, max), min);
};
export abstract class AnimationManager {
public interruptManager: InterruptManager;
public eventManager: EventManager;
public axisManager: AxisManager;
protected _options: AxesOption;
protected _animateParam: AnimationParam;
private _raf: number;
public constructor({
options,
interruptManager,
eventManager,
axisManager,
}: {
options: AxesOption;
interruptManager: InterruptManager;
eventManager: EventManager;
axisManager: AxisManager;
}) {
this._options = options;
this.interruptManager = interruptManager;
this.eventManager = eventManager;
this.axisManager = axisManager;
this.animationEnd = this.animationEnd.bind(this);
}
public abstract interpolate(displacement: number, threshold: number): number;
public abstract updateAnimation(options: UpdateAnimationOption): void;
protected abstract _initState(info: AnimationParam): AnimationState;
protected abstract _getNextState(prevState: AnimationState): AnimationState;
public getDuration(
depaPos: Axis,
destPos: Axis,
wishDuration?: number
): number {
let duration: number;
if (typeof wishDuration !== "undefined") {
duration = wishDuration;
} else {
const durations: Axis = map(destPos, (v, k) =>
getDuration(Math.abs(v - depaPos[k]), this._options.deceleration)
);
duration = Object.keys(durations).reduce(
(max, v) => Math.max(max, durations[v]),
-Infinity
);
}
return clamp(
duration,
this._options.minimumDuration,
this._options.maximumDuration
);
}
public getDisplacement(velocity: number[]): number[] {
const totalVelocity = Math.pow(
velocity.reduce((total, v) => total + v * v, 0),
1 / velocity.length
);
const duration = Math.abs(totalVelocity / -this._options.deceleration);
return velocity.map((v) => (v / 2) * duration);
}
public stopAnimation(option?: ChangeEventOption): void {
if (this._animateParam) {
const orgPos: Axis = this.axisManager.get();
const pos: Axis = this.axisManager.map(orgPos, (v, opt) =>
getCirculatedPos(v, opt.range, opt.circular as boolean[])
);
<span class="missing-if-branch" title="if path not taken" >I</span>if (!every(pos, (v, k) => orgPos[k] === v)) {
<span class="cstat-no" title="statement not covered" > this.eventManager.triggerChange(pos, orgPos, option, !!option);</span>
}
this._animateParam = null;
<span class="missing-if-branch" title="else path not taken" >E</span>if (this._raf) {
cancelAnimationFrame(this._raf);
}
this._raf = null;
this.eventManager.triggerAnimationEnd(!!option?.event);
}
}
public getEventInfo(): ChangeEventOption {
if (
this._animateParam &&
this._animateParam.input &&
this._animateParam.inputEvent
) {
return {
input: this._animateParam.input,
event: this._animateParam.inputEvent,
};
} else {
return null;
}
}
public restore(option: ChangeEventOption): void {
const pos: Axis = this.axisManager.get();
const destPos: Axis = this.axisManager.map(pos, (v, opt) =>
Math.min(opt.range[1], Math.max(opt.range[0], v))
);
this.stopAnimation();
this.animateTo(destPos, this.getDuration(pos, destPos), option);
}
public animationEnd(): void {
const beforeParam: ChangeEventOption = this.getEventInfo();
this._animateParam = null;
// for Circular
const circularTargets = this.axisManager.filter(
this.axisManager.get(),
(v, opt) => isCircularable(v, opt.range, opt.circular as boolean[])
);
<span class="missing-if-branch" title="if path not taken" >I</span>if (Object.keys(circularTargets).length > 0) {
<span class="cstat-no" title="statement not covered" > this.setTo(</span>
this.axisManager.map(circularTargets, <span class="fstat-no" title="function not covered" >(</span>v, opt) =>
<span class="cstat-no" title="statement not covered" > getCirculatedPos(v, opt.range, opt.circular as boolean[])</span>
)
);
}
this.interruptManager.setInterrupt(false);
this.eventManager.triggerAnimationEnd(!!beforeParam);
if (this.axisManager.isOutside()) {
this.restore(beforeParam);
} else {
this.finish(!!beforeParam);
}
}
public finish(isTrusted: boolean): void {
this._animateParam = null;
this.interruptManager.setInterrupt(false);
this.eventManager.triggerFinish(isTrusted);
}
public getUserControl(param: AnimationParam): {
destPos: Axis;
duration: number;
} {
const userWish = param.setTo();
userWish.destPos = this.axisManager.get(userWish.destPos);
userWish.duration = clamp(
userWish.duration,
this._options.minimumDuration,
this._options.maximumDuration
);
return userWish;
}
public animateTo(
destPos: Axis,
duration: number,
option?: ChangeEventOption
): void {
this.stopAnimation();
const param: AnimationParam = this._createAnimationParam(
destPos,
duration,
option
);
const depaPos = { ...param.depaPos };
const retTrigger = this.eventManager.triggerAnimationStart(param);
// to control
const userWish = this.getUserControl(param);
// You can't stop the 'animationStart' event when 'circular' is true.
<span class="missing-if-branch" title="if path not taken" >I</span>if (
!retTrigger &&
this.axisManager.every(userWish.destPos, (v, opt) =>
isCircularable(v, opt.range, opt.circular as boolean[])
)
) {
<span class="cstat-no" title="statement not covered" > console.warn(</span>
"You can't stop the 'animation' event when 'circular' is true."
);
}
if (retTrigger && !equal(userWish.destPos, depaPos)) {
const inputEvent = option?.event || null;
this._animateLoop(
{
depaPos,
destPos: userWish.destPos,
duration: userWish.duration,
delta: this.axisManager.getDelta(depaPos, userWish.destPos),
isTrusted: !!inputEvent,
inputEvent,
input: option?.input || null,
},
() => this.animationEnd()
);
}
}
public setTo(pos: Axis, duration: number = 0) {
const axes: string[] = Object.keys(pos);
const orgPos: Axis = this.axisManager.get(axes);
if (equal(pos, orgPos)) {
return this;
}
this.interruptManager.setInterrupt(true);
let movedPos = filter(pos, (v, k) => orgPos[k] !== v);
<span class="missing-if-branch" title="if path not taken" >I</span>if (!Object.keys(movedPos).length) {
<span class="cstat-no" title="statement not covered" > return this;</span>
}
movedPos = this.axisManager.map(movedPos, (v, opt) => {
const { range, circular } = opt;
if (circular && (circular[0] || circular[1])) {
return v;
} else {
return getInsidePosition(v, range, circular as boolean[]);
}
});
<span class="missing-if-branch" title="if path not taken" >I</span>if (equal(movedPos, orgPos)) {
<span class="cstat-no" title="statement not covered" > return this;</span>
}
if (duration > 0) {
this.animateTo(movedPos, duration);
} else {
this.stopAnimation();
this.eventManager.triggerChange(movedPos);
this.finish(false);
}
return this;
}
public setBy(pos: Axis, <span class="missing-if-branch" title="if path not taken" >I</span>duration = 0) {
return this.setTo(
map(this.axisManager.get(Object.keys(pos)), (v, k) => v + pos[k]),
duration
);
}
public setOptions(options: AxesOption) {
this._options = {
...this._options,
...options,
};
}
private _createAnimationParam(
pos: Axis,
duration: number,
option?: ChangeEventOption
): AnimationParam {
const depaPos: Axis = this.axisManager.get();
const destPos: Axis = pos;
const inputEvent = option?.event || null;
return {
depaPos,
destPos,
duration: clamp(
duration,
this._options.minimumDuration,
this._options.maximumDuration
),
delta: this.axisManager.getDelta(depaPos, destPos),
inputEvent,
input: option?.input || null,
isTrusted: !!inputEvent,
done: this.animationEnd,
};
}
private _animateLoop(param: AnimationParam, complete: () => void): void {
<span class="missing-if-branch" title="else path not taken" >E</span>if (param.duration) {
this._animateParam = {
...param,
startTime: new Date().getTime(),
};
const originalIntendedPos = map(param.destPos, (v) => v);
let state = this._initState(this._animateParam);
const loop = () => {
this._raf = null;
const animateParam = this._animateParam;
const nextState = this._getNextState(state);
const isCanceled = !this.eventManager.triggerChange(
nextState.pos,
state.pos
);
state = nextState;
if (nextState.finished) {
animateParam.destPos = this._getFinalPos(
animateParam.destPos,
originalIntendedPos
);
<span class="missing-if-branch" title="if path not taken" >I</span>if (
!equal(
animateParam.destPos,
this.axisManager.get(Object.keys(animateParam.destPos))
)
) {
<span class="cstat-no" title="statement not covered" > this.eventManager.triggerChange(</span>
animateParam.destPos,
nextState.pos
);
}
complete();
return;
} else if (isCanceled) {
this.finish(false);
} else {
this._raf = requestAnimationFrame(loop);
}
};
loop();
} else {
<span class="cstat-no" title="statement not covered" > this.eventManager.triggerChange(param.destPos);</span>
<span class="cstat-no" title="statement not covered" > complete();</span>
}
}
/**
* Get estimated final value.
*
* If destPos is within the 'error range' of the original intended position, the initial intended position is returned.
* - eg. original intended pos: 100, destPos: 100.0000000004 ==> return 100;
* If dest Pos is outside the 'range of error' compared to the originally intended pos, it is returned rounded based on the originally intended pos.
* - eg. original intended pos: 100.123 destPos: 50.12345 => return 50.123
* @param originalIntendedPos
* @param destPos
*/
private _getFinalPos(
destPos: ObjectInterface<number>,
originalIntendedPos: ObjectInterface<number>
): Axis {
// compare destPos and originalIntendedPos
// eslint-disable-next-line @typescript-eslint/naming-convention
const ERROR_LIMIT = 0.000001;
const finalPos = map(destPos, (value, key) => {
if (
value >= originalIntendedPos[key] - ERROR_LIMIT &&
value <= originalIntendedPos[key] + ERROR_LIMIT
) {
// In error range, return original intended
return originalIntendedPos[key];
} else {
// Out of error range, return rounded pos.
const roundUnit = this._getRoundUnit(value, key);
const result = roundNumber(value, roundUnit);
return result;
}
});
return finalPos;
}
private _getRoundUnit(val: number, key: string): number {
const roundUnit = this._options.round; // manual mode
let minRoundUnit = null; // auto mode
// auto mode
<span class="missing-if-branch" title="else path not taken" >E</span>if (!roundUnit) {
// Get minimum round unit
const options = this.axisManager.getAxisOptions(key);
minRoundUnit = inversePow(
Math.max(
getDecimalPlace(options.range[0]),
getDecimalPlace(options.range[1]),
getDecimalPlace(val)
)
);
}
return minRoundUnit || <span class="branch-1 cbranch-no" title="branch not covered" >roundUnit;</span>
}
}
</pre></td></tr>
</table></pre>
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