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scale.ts
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scale.ts
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import {isDef} from "./util";
import {Duration} from "luxon";
let _lastId = 0;
export class AmplitudeScalable {
middle: number;
halfWidth: number;
constructor(middle: number, halfWidth: number) {
this.middle = middle;
this.halfWidth = halfWidth;
}
getAmplitudeRange(): Array<number> {
return [-1, 1]; // default
}
// eslint-disable-next-line no-unused-vars
notifyAmplitudeChange(middle: number, halfWidth: number) {
// no-op
}
toString(): string {
return `mid: ${this.middle} hw: ${this.halfWidth}`;
}
}
export class TimeScalable {
alignmentTimeOffset: Duration;
duration: Duration;
constructor(
alignmentTimeOffset: Duration,
duration: Duration,
) {
this.alignmentTimeOffset = alignmentTimeOffset;
this.duration = duration;
}
// eslint-disable-next-line no-unused-vars
notifyTimeRangeChange(
alignmentTimeOffset: Duration,
duration: Duration,
) {
// no-op
}
}
/**
* Links amplitude scales across multiple seismographs, respecting doRmean.
*
* @param graphList optional list of AmplitudeScalable to link
*/
export class LinkedAmplitudeScale {
/**
* @private
*/
_graphSet: Set<AmplitudeScalable>;
_halfWidth: number;
_recalcTimeoutID: ReturnType<typeof setTimeout> | null;
_scaleId: number;
constructor(graphList?: Array<AmplitudeScalable>) {
this._scaleId = ++_lastId;
const glist = graphList ? graphList : []; // in case null
this._halfWidth = 0;
this._graphSet = new Set(glist);
this._recalcTimeoutID = null;
}
get halfWidth(): number {
return this._halfWidth;
}
set halfWidth(val: number) {
if (this._halfWidth !== val) {
this._halfWidth = val;
this.notifyAll();
}
}
/**
* Links new Seismograph with this amplitude scale.
*
* @param graphList Array of AmplitudeScalable to link
*/
linkAll(graphList: Array<AmplitudeScalable | { amp_scalable: AmplitudeScalable}>) {
graphList.forEach(graph => {
if ("notifyAmplitudeChange" in graph) {
this._graphSet.add(graph);
} else if ("amp_scalable" in graph) {
this._graphSet.add(graph.amp_scalable);
} else {
console.warn(`graph does not have notifyAmplitudeChange method or amp_scalable field, skipping: ${graph}`);
}
});
this.recalculate();
}
/**
* Link new Seismograph with this amplitude scale.
*
* @param graph AmplitudeScalable to link
*/
link(graph: AmplitudeScalable | { amp_scalable: AmplitudeScalable}) {
this.linkAll([graph]);
}
/**
* Unlink Seismograph with this amplitude scale.
*
* @param graph AmplitudeScalable to unlink
*/
unlink(graph: AmplitudeScalable) {
this._graphSet.delete(graph);
this.recalculate();
}
/**
* Recalculate the best amplitude scale for all Seismographs. Causes a redraw.
*/
recalculate() {
if (this._recalcTimeoutID) {
clearTimeout(this._recalcTimeoutID);
}
const mythis = this;
this._recalcTimeoutID = setTimeout(() => {
const maxHalfRange = mythis.graphList.reduce((acc, cur) => {
return acc > cur.halfWidth ? acc : cur.halfWidth;
}, 0);
if (mythis.halfWidth !== maxHalfRange) {
mythis.halfWidth = maxHalfRange;
mythis.graphList.forEach(g => {
g.notifyAmplitudeChange(g.middle, maxHalfRange);
});
}
}, 100);
}
notifyAll() {
const hw = this.halfWidth;
this.graphList.forEach(g => {
setTimeout(() => {
g.notifyAmplitudeChange(g.middle, hw);
}, 10);
});
}
get graphList() {
return Array.from(this._graphSet.values());
}
}
export class IndividualAmplitudeScale extends LinkedAmplitudeScale {
constructor(graphList?: Array<AmplitudeScalable>) {
super(graphList);
}
recalculate() {
const graphList = Array.from(this._graphSet.values());
graphList.forEach(g => {
if (g) {
g.notifyAmplitudeChange(g.middle, g.halfWidth);
}
});
}
notifyAll() {
// just to override super
this.recalculate();
}
}
/**
* Links time scales across multiple seismographs.
*
* @param graphList optional list of TimeScalables to link
*/
export class LinkedTimeScale {
/**
* @private
*/
_graphSet: Set<TimeScalable>;
_originalDuration: Duration;
_originalStartOffset: Duration;
_zoomedDuration: null | Duration;
_zoomedStartOffset: null | Duration;
_scaleId: number;
constructor(
graphList?: Array<TimeScalable>,
originalDuration?: Duration,
originalStartOffset?: Duration,
scaleId?: number,
) {
if (scaleId) {this._scaleId = scaleId;} else {this._scaleId = -1;}
const glist = graphList ? graphList : []; // in case null
this._graphSet = new Set(glist);
this._originalDuration = Duration.fromMillis(0);
this._originalStartOffset = Duration.fromMillis(0);
this._zoomedDuration = null;
this._zoomedStartOffset = null;
if (isDef(originalDuration)) {
this._originalDuration = originalDuration;
// so know that duration passed in instead of calculated
// this prevents future links from causeing recalc
this._zoomedDuration = originalDuration;
} else if (glist.length > 0) {
this._originalDuration = glist.reduce((acc, cur) => {
return acc > cur.duration
? acc
: cur.duration;
}, Duration.fromMillis(0));
}
if (originalStartOffset) {
this._originalStartOffset = originalStartOffset;
} else {
this._originalStartOffset = Duration.fromMillis(0);
}
this.recalculate();
}
/**
* Link new TimeScalable with this time scale.
*
* @param graph TimeScalable to link
*/
link(graph: TimeScalable | { time_scalable: TimeScalable}) {
this.linkAll([graph]);
}
/**
* Links TimeScalable with this time scale. Each
* object in the array should either be a TimeScalable
* or have a time_scalable field that is a TimeScalable.
*
* @param graphList Array of TimeScalable to link
*/
linkAll(graphList: Array<TimeScalable | { time_scalable: TimeScalable}>) {
graphList.forEach(graph => {
if ("notifyTimeRangeChange" in graph) {
this._graphSet.add(graph);
} else if ("time_scalable" in graph) {
this._graphSet.add(graph.time_scalable);
} else {
console.warn(`graph does not have notifyTimeRangeChange method or time_scalable field, skipping: ${graph}`);
}
});
this.recalculate();
}
/**
* Unlink TimeScalable with this amplitude scale.
*
* @param graph TimeScalable to unlink
*/
unlink(graph: TimeScalable) {
this._graphSet.delete(graph);
this.recalculate();
}
zoom(startOffset: Duration, duration: Duration) {
this._zoomedDuration = duration;
this._zoomedStartOffset = startOffset;
this.notifyAll();
}
unzoom() {
this._zoomedDuration = null;
this._zoomedStartOffset = null;
this.recalculate();
}
get offset(): Duration {
return this._zoomedStartOffset
? this._zoomedStartOffset
: this._originalStartOffset;
}
set offset(offset: Duration) {
this._originalStartOffset = offset;
this._zoomedStartOffset = offset;
this.recalculate();
}
get duration(): Duration {
return isDef(this._zoomedDuration) ? this._zoomedDuration : this._originalDuration;
}
set duration(duration: Duration) {
if (!isDef(duration)) {
throw new Error(`Duration must be defined: ${duration}`);
}
this._originalDuration = duration;
this._zoomedDuration = duration;
this.recalculate();
}
get origOffset(): Duration {
return this._originalStartOffset;
}
get origDuration(): Duration {
return this._originalDuration;
}
/**
* Recalculate the best time scale for all Seismographs. Causes a redraw.
*/
recalculate() {
if (!isDef(this._zoomedDuration) || this._originalDuration.toMillis() === 0) {
this.graphList.forEach(graph => {
if (graph && graph.duration > this._originalDuration) {
this._originalDuration = graph.duration;
}
});
}
this.notifyAll();
}
notifyAll() {
this.graphList.forEach(graph => {
if (graph) {
// run later via event loop
setTimeout(() => {
graph.notifyTimeRangeChange(this.offset, this.duration);
});
}
});
}
get graphList() {
return Array.from(this._graphSet.values());
}
}