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32076x 17462x 17582x 45x 2x 2x 2x 1x 43x 41x 41x 41x 85x 85x 68x 43x 43x 43x 29x 10x 347x 347x 337x 337x 337x 400x 400x 370x 47x 47x 47x 260x 51492x 51492x 51492x 51492x 51492x 51492x 51492x 9531x 9531x 9531x 9531x 51492x 51492x 16099x 35393x 35393x 35393x 35393x 35393x 66013x 18284x 18284x 18284x 18012x 4107x 4107x 52108x 48399x 48399x 18268x 4758x 38598x 11178x 11178x 66085x 66085x 66085x 1181x 2266x 2266x 3656x 3656x 3656x 163x 2088x 347x 347x 347x 2043x 2043x 2043x 2043x 817x 25x 25x 817x 777x 777x 2007x 4993x 2986x 995x 920x 920x 16x 16x 979x 979x 979x 979x 10479x 10479x 1504x 1504x 3008x 8975x 8975x 8975x 59937x 59937x 59937x 17135x 8514x 8514x 8514x 42802x 42802x 42802x 8659x 264x 264x 42802x 50x 10429x 10429x 62800x 62800x 52725x 52725x 52725x 20x 9x 9x 10x 3x 2x 6323x 6323x 6323x 4136x 14109x 13297x 13297x 13297x 27227x 27227x 13297x 2x 2x 4136x 4668x 4668x 4668x 3973x 11394x 11394x 20007x 11394x 26x 26x 3973x 1014x 1014x 1014x 1014x 198x 198x 1014x 1014x 1014x 1014x 1014x 1014x 1014x 1014x 1308x 18x 18x 12x 1290x 1290x 1290x 1290x 1854x 1854x 1854x 1854x 1854x 948x 948x 168x 168x 1290x 882x 882x 54x 882x 408x 126x 114x 114x 408x 1014x 2542x 2542x 2542x 3283x 38112x 38112x 38112x 38112x 38112x 38112x 8355x 38112x 3283x 114336x 114336x 114336x 114336x 114336x 17433x 51884x 51884x 38907x 38907x 38907x 37431x 14453x 14453x 17433x 6979x 28005x 28005x 28005x 8664x 114336x 13439x 13439x 13439x 13439x 13439x 13439x 13439x 13439x 9406x 9406x 13439x 12505x 7997x 7997x 12505x 17143x 934x 13439x 1014x 1014x 1014x 1013x 1013x 1013x 1014x 10140x 10140x 10140x 16952x 16952x 16952x 10140x 10140x 10140x 10140x 26878x 26878x 26878x 17403x 27892x 1014x 27892x 27892x 27892x 4081x 4081x 23811x 14335x 14335x 1158x 14335x 14335x 12725x 12725x 3283x 8355x 8355x 8355x 8355x 8353x 8353x 8353x 8353x 8353x 43142x 43142x 43142x 43142x 43142x 47503x 47503x 43142x 58856x 43142x 43142x 43142x 43142x 1424x 402x 1022x 1424x 1424x 1424x 8353x 1022x 7331x 8353x | import {printTree} from 'tree-dump/lib/printTree';
import {printBinary} from 'tree-dump/lib/printBinary';
import {first, insertLeft, insertRight, last, next, prev, remove} from 'sonic-forest/lib/util';
import {first2, insert2, last2, next2, prev2, remove2} from 'sonic-forest/lib/util2';
import {splay} from 'sonic-forest/lib/splay/util';
import {Anchor} from '../rga/constants';
import {OverlayPoint} from './OverlayPoint';
import {MarkerOverlayPoint} from './MarkerOverlayPoint';
import {OverlayRefSliceEnd, OverlayRefSliceStart} from './refs';
import {compare, type ITimestampStruct} from '../../../json-crdt-patch/clock';
import {CONST, updateNum} from '../../../json-hash';
import {MarkerSlice} from '../slice/MarkerSlice';
import {UndefEndIter, type UndefIterator} from '../../../util/iterator';
import {SliceBehavior} from '../slice/constants';
import type {Point} from '../rga/Point';
import type {Range} from '../rga/Range';
import type {Chunk} from '../../../json-crdt/nodes/rga';
import type {Peritext} from '../Peritext';
import type {Stateful} from '../types';
import type {Printable} from 'tree-dump/lib/types';
import type {MutableSlice, Slice, SliceType} from '../slice/types';
import type {Slices} from '../slice/Slices';
import type {MarkerOverlayPair, OverlayPair, OverlayTuple} from './types';
import type {Comparator} from 'sonic-forest/lib/types';
const spatialComparator: Comparator<OverlayPoint> = (a: OverlayPoint, b: OverlayPoint) => a.cmpSpatial(b);
/**
* Overlay is a tree structure that represents all the intersections of slices
* in the text. It is used to quickly find all the slices that overlap a
* given point in the text. The overlay is a read-only structure, its state
* is changed only by calling the `refresh` method, which updates the overlay
* based on the current state of the text and slices.
*/
export class Overlay<T = string> implements Printable, Stateful {
public root: OverlayPoint<T> | undefined = undefined;
public root2: MarkerOverlayPoint<T> | undefined = undefined;
/** A virtual absolute start point, used when the absolute start is missing. */
public readonly START: OverlayPoint<T>;
/** A virtual absolute end point, used when the absolute end is missing. */
public readonly END: OverlayPoint<T>;
constructor(protected readonly txt: Peritext<T>) {
const id = txt.str.id;
this.START = this.point(id, Anchor.After);
this.END = this.point(id, Anchor.Before);
}
private point(id: ITimestampStruct, anchor: Anchor): OverlayPoint<T> {
return new OverlayPoint(this.txt.str, id, anchor);
}
private mPoint(marker: MarkerSlice<T>, anchor: Anchor): MarkerOverlayPoint<T> {
return new MarkerOverlayPoint(this.txt.str, marker.start.id, anchor, marker);
}
public first(): OverlayPoint<T> | undefined {
return this.root ? first(this.root) : undefined;
}
public last(): OverlayPoint<T> | undefined {
return this.root ? last(this.root) : undefined;
}
public firstMarker(): MarkerOverlayPoint<T> | undefined {
return this.root2 ? first2(this.root2) : undefined;
}
public lastMarker(): MarkerOverlayPoint<T> | undefined {
return this.root2 ? last2(this.root2) : undefined;
}
/**
* Retrieve overlay point or the previous one, measured in spacial dimension.
*/
public getOrNextLower(point: Point<T>): OverlayPoint<T> | undefined {
if (point.isAbsStart()) {
const first = this.first();
if (!first) return;
if (first.isAbsStart()) return first;
point = first;
} else if (point.isAbsEnd()) return this.last();
let curr: OverlayPoint<T> | undefined = this.root;
let result: OverlayPoint<T> | undefined = undefined;
while (curr) {
const cmp = curr.cmpSpatial(point);
if (cmp === 0) return curr;
if (cmp > 0) curr = curr.l;
else {
const next = curr.r;
result = curr;
if (!next) return result;
curr = next;
}
}
return result;
}
/**
* Retrieve overlay point or the next one, measured in spacial dimension.
*/
public getOrNextHigher(point: Point<T>): OverlayPoint<T> | undefined {
if (point.isAbsEnd()) {
const last = this.last();
Iif (!last) return;
if (last.isAbsEnd()) return last;
point = last;
} else if (point.isAbsStart()) return this.first();
let curr: OverlayPoint<T> | undefined = this.root;
let result: OverlayPoint<T> | undefined = undefined;
while (curr) {
const cmp = curr.cmpSpatial(point);
if (cmp === 0) return curr;
if (cmp < 0) curr = curr.r;
else {
const next = curr.l;
result = curr;
if (!next) return result;
curr = next;
}
}
return result;
}
/**
* Retrieve a {@link MarkerOverlayPoint} at the specified point or the
* previous one, measured in spacial dimension.
*/
public getOrNextLowerMarker(point: Point<T>): MarkerOverlayPoint<T> | undefined {
Iif (point.isAbsStart()) {
const first = this.firstMarker();
Iif (!first) return;
Iif (first.isAbsStart()) return first;
point = first;
} else if (point.isAbsEnd()) return this.lastMarker();
let curr: MarkerOverlayPoint<T> | undefined = this.root2;
let result: MarkerOverlayPoint<T> | undefined = undefined;
while (curr) {
const cmp = curr.cmpSpatial(point);
if (cmp === 0) return curr;
if (cmp > 0) curr = curr.l2;
else {
const next = curr.r2;
result = curr;
if (!next) return result;
curr = next;
}
}
return result;
}
/** @todo Rename to `chunks()`. */
public chunkSlices0(
chunk: Chunk<T> | undefined,
p1: Point<T>,
p2: Point<T>,
callback: (chunk: Chunk<T>, off: number, len: number) => boolean | void,
): Chunk<T> | undefined {
const rga = this.txt.str;
const strId = rga.id;
let checkFirstAnchor = p1.anchor === Anchor.After;
const adjustForLastAnchor = p2.anchor === Anchor.Before;
let id1 = p1.id;
const id1IsStr = !compare(id1, strId);
if (id1IsStr) {
const first = rga.first();
Iif (!first) return;
id1 = first.id;
checkFirstAnchor = false;
}
const id2 = p2.id;
if (!checkFirstAnchor && !adjustForLastAnchor) {
return rga.range0(chunk, id1, id2, callback) as Chunk<T>;
}
const sid1 = id1.sid;
const time1 = id1.time;
const sid2 = id2.sid;
const time2 = id2.time;
return rga.range0(undefined, id1, id2, (chunk: Chunk<T>, off: number, len: number): boolean | void => {
if (checkFirstAnchor) {
checkFirstAnchor = false;
const chunkId = chunk.id;
if (chunkId.sid === sid1 && chunkId.time + off === time1) {
if (len <= 1) return;
off += 1;
len -= 1;
}
}
if (adjustForLastAnchor) {
const chunkId = chunk.id;
if (chunkId.sid === sid2 && chunkId.time + off + len - 1 === time2) {
if (len <= 1) return;
len -= 1;
}
}
Iif (callback(chunk, off, len)) return true;
}) as Chunk<T>;
}
public points0(after: undefined | OverlayPoint<T>, inclusive?: boolean): UndefIterator<OverlayPoint<T>> {
let curr = after ? (inclusive ? after : next(after)) : this.first();
return () => {
const ret = curr;
if (curr) curr = next(curr);
return ret;
};
}
public points(after?: undefined | OverlayPoint<T>, inclusive?: boolean): IterableIterator<OverlayPoint<T>> {
return new UndefEndIter(this.points0(after, inclusive));
}
/**
* Returns all {@link MarkerOverlayPoint} instances in the overlay, starting
* from the given marker point, not including the marker point itself.
*
* If the `after` parameter is not provided, the iteration starts from the
* first marker point in the overlay.
*
* @param after The marker point after which to start the iteration.
* @returns All marker points in the overlay, starting from the given marker
* point.
*/
public markers0(after: undefined | MarkerOverlayPoint<T>): UndefIterator<MarkerOverlayPoint<T>> {
let curr = after ? next2(after) : first2(this.root2);
return () => {
const ret = curr;
if (curr) curr = next2(curr);
return ret;
};
}
public markers(after?: undefined | MarkerOverlayPoint<T>): UndefEndIter<MarkerOverlayPoint<T>> {
return new UndefEndIter(this.markers0(after));
}
/**
* Returns all {@link MarkerOverlayPoint} instances in the overlay, starting
* from a give {@link Point}, including any marker overlay points that are
* at the same position as the given point.
*
* @param point Point (inclusive) from which to return all markers.
* @returns All marker points in the overlay, starting from the given marker
* point.
*/
public markersFrom0(point: Point<T>): UndefIterator<MarkerOverlayPoint<T>> {
if (point.isAbsStart()) return this.markers0(undefined);
let after = this.getOrNextLowerMarker(point);
if (after && after.cmp(point) === 0) after = prev2(after);
return this.markers0(after);
}
/**
* Returns a pair of overlay marker points for each pair of adjacent marker
* points in the overlay, starting from a given point (which may not be a
* marker). The very first point in the first pair might be `undefined`, if
* the given point is not a marker. Similarly, the very last point in the last
* pair might be `undefined`, if the iteration end point is not a marker.
*
* @param start Start point of the iteration, inclusive.
* @param end End point of the iteration. If not provided, the iteration
* continues until the end of the overlay.
* @returns Iterator that returns pairs of overlay points.
*/
public markerPairs0(start: Point<T>, end?: Point<T>): UndefIterator<MarkerOverlayPair<T>> {
const i = this.markersFrom0(start);
let closed = false;
let p1: MarkerOverlayPoint<T> | undefined;
let p2: MarkerOverlayPoint<T> | undefined = i();
if (p2) {
if (p2.isAbsStart() || !p2.cmp(start)) {
p1 = p2;
p2 = i();
}
if (end && p2) {
const cmp = end.cmpSpatial(p2);
if (cmp <= 0) return () => (closed ? void 0 : ((closed = true), [p1, cmp ? void 0 : p2]));
}
}
return () => {
if (closed) return;
if (!p2 || p2.isAbsEnd()) return (closed = true), [p1, p2];
else if (p2 && end) {
const cmp = end.cmpSpatial(p2);
if (cmp <= 0) {
closed = true;
return [p1, cmp ? void 0 : p2];
}
}
const result: MarkerOverlayPair<T> = [p1, p2];
p1 = p2;
p2 = i();
return result;
};
}
public pairs0(after: undefined | OverlayPoint<T>): UndefIterator<OverlayPair<T>> {
const isEmpty = !this.root;
if (isEmpty) {
const u = undefined;
let closed = false;
return () => (closed ? u : ((closed = true), [u, u]));
}
let p1: OverlayPoint<T> | undefined;
let p2: OverlayPoint<T> | undefined = after;
const iterator = this.points0(after);
return () => {
const next = iterator();
const isEnd = !next;
if (isEnd) {
if (!p2 || p2.isAbsEnd()) return;
p1 = p2;
p2 = undefined;
return [p1, p2];
}
p1 = p2;
p2 = next;
if (!p1) {
if (p2 && p2.isAbsStart()) {
p1 = p2;
p2 = iterator();
}
}
return p1 || p2 ? [p1, p2] : undefined;
};
}
public pairs(after?: undefined | OverlayPoint<T>): IterableIterator<OverlayPair<T>> {
return new UndefEndIter(this.pairs0(after));
}
public tuples0(after: undefined | OverlayPoint<T>): UndefIterator<OverlayTuple<T>> {
const iterator = this.pairs0(after);
return () => {
const pair = iterator();
if (!pair) return;
pair[0] ??= this.START;
pair[1] ??= this.END;
return pair as OverlayTuple<T>;
};
}
public tuples(after?: undefined | OverlayPoint<T>): IterableIterator<OverlayTuple<T>> {
return new UndefEndIter(this.tuples0(after));
}
/**
* Finds the first point that satisfies the given predicate function.
*
* @param predicate Predicate function to find the point, returns true if the
* point is found.
* @returns The first point that satisfies the predicate, or undefined if no
* point is found.
*/
public find(predicate: (point: OverlayPoint<T>) => boolean): OverlayPoint<T> | undefined {
let point = this.first();
while (point) {
if (predicate(point)) return point;
point = next(point);
}
return;
}
/**
* Finds all slices that are contained within the given range. A slice is
* considered contained if its start and end points are within the range,
* inclusive (uses {@link Range#contains} method to check containment).
*
* @param range The range to search for contained slices.
* @returns A set of slices that are contained within the given range.
*/
public findContained(range: Range<T>): Set<Slice<T>> {
const result = new Set<Slice<T>>();
let point = this.getOrNextLower(range.start) ?? this.first();
if (!point) return result;
do {
if (!range.containsPoint(point)) continue;
const slices = point.layers;
const length = slices.length;
for (let i = 0; i < length; i++) {
const slice = slices[i];
if (!result.has(slice) && range.contains(slice)) result.add(slice);
}
if (point instanceof MarkerOverlayPoint) {
const marker = point.marker;
if (marker && !result.has(marker) && range.contains(marker)) result.add(marker);
}
} while (point && (point = next(point)) && range.containsPoint(point));
return result;
}
/**
* Finds all slices that overlap with the given range. A slice is considered
* overlapping if its start or end point is within the range, inclusive
* (uses {@link Range#containsPoint} method to check overlap).
*
* @param range The range to search for overlapping slices.
* @returns A set of slices that overlap with the given range.
*/
public findOverlapping(range: Range<T>): Set<Slice<T>> {
const result = new Set<Slice<T>>();
let point: OverlayPoint<T> | undefined = this.getOrNextLower(range.start) ?? this.first();
if (!point) return result;
do {
const slices = point.layers;
const length = slices.length;
for (let i = 0; i < length; i++) result.add(slices[i]);
if (point instanceof MarkerOverlayPoint) {
const marker = point.marker;
if (marker) result.add(marker);
}
} while (point && (point = next(point)) && range.containsPoint(point));
return result;
}
/**
* Returns a summary of how different slice types overlap with the given range.
*
* @param range Range over which to search for slices.
* @param endOnMarker If set to a positive number, the search will stop after
* the given number of marker points have been observed.
* @returns Summary of the slices in this range. `complete` contains all
* "Overwrite" slice types, which overlay the full range, which have not
* been removed by "Erase" slice type. `partial` contains all "Overwrite"
* slice types, which mark a part of the range, and have not been removed
* by "Erase" slice type.
*/
public stat(
range: Range<T>,
endOnMarker = 10,
): [complete: Set<SliceType>, partial: Set<SliceType>, markerCount: number] {
const {start, end: end_} = range;
let end = end_;
const isSamePoint = start.cmp(end_) === 0;
if (isSamePoint) {
end = end.clone();
end.halfstep(1);
}
const after = this.getOrNextLower(start);
const hasLeadingPoint = !!after;
const iterator = this.points0(after, true);
let complete: Set<SliceType> = new Set<SliceType>();
let partial: Set<SliceType> = new Set<SliceType>();
let isFirst = true;
let markerCount = 0;
OVERLAY: for (let point = iterator(); point && point.cmpSpatial(end) < 0; point = iterator()) {
if (point instanceof MarkerOverlayPoint) {
markerCount++;
if (markerCount >= endOnMarker) break;
continue OVERLAY;
}
const current = new Set<SliceType>();
const layers = point.layers;
const length = layers.length;
LAYERS: for (let i = 0; i < length; i++) {
const slice = layers[i];
const type = slice.type;
Iif (typeof type === 'object') continue LAYERS;
const behavior = slice.behavior;
BEHAVIOR: switch (behavior) {
case SliceBehavior.One:
current.add(type);
break BEHAVIOR;
case SliceBehavior.Erase:
current.delete(type);
break BEHAVIOR;
}
}
if (isFirst) {
isFirst = false;
if (hasLeadingPoint) complete = current;
else partial = current;
continue OVERLAY;
}
for (const type of complete)
if (!current.has(type)) {
complete.delete(type);
partial.add(type);
}
for (const type of current) if (!complete.has(type)) partial.add(type);
}
return [complete, partial, markerCount];
}
/**
* Returns `true` if the current character is a marker sentinel.
*
* @param id ID of the point to check.
* @returns Whether the point is a marker point.
*/
public isMarker(id: ITimestampStruct): boolean {
const p = this.txt.point(id, Anchor.Before);
const op = this.getOrNextLower(p);
return op instanceof MarkerOverlayPoint && op.id.time === id.time && op.id.sid === id.sid;
}
// ----------------------------------------------------------------- Stateful
public hash: number = 0;
public refresh(slicesOnly: boolean = false): number {
const txt = this.txt;
let hash: number = CONST.START_STATE;
hash = this.refreshSlices(hash, txt.savedSlices);
hash = this.refreshSlices(hash, txt.extraSlices);
hash = this.refreshSlices(hash, txt.localSlices);
// TODO: Move test hash calculation out of the overlay.
if (!slicesOnly) {
// hash = updateRga(hash, txt.str);
hash = this.refreshTextSlices(hash);
}
return (this.hash = hash);
}
public readonly slices = new Map<Slice<T>, [start: OverlayPoint<T>, end: OverlayPoint<T>]>();
private refreshSlices(state: number, slices: Slices<T>): number {
const oldSlicesHash = slices.hash;
const changed = oldSlicesHash !== slices.refresh();
const sliceSet = this.slices;
state = updateNum(state, slices.hash);
if (changed) {
// biome-ignore lint: slices is not iterable
slices.forEach((slice) => {
let tuple: [start: OverlayPoint<T>, end: OverlayPoint<T>] | undefined = sliceSet.get(slice);
if (tuple) {
Iif ((slice as any).isDel && (slice as any).isDel()) {
this.delSlice(slice, tuple);
return;
}
const positionMoved = tuple[0].cmp(slice.start) !== 0 || tuple[1].cmp(slice.end) !== 0;
if (positionMoved) this.delSlice(slice, tuple);
else return;
}
tuple = slice instanceof MarkerSlice ? this.insMarker(slice) : this.insSlice(slice);
this.slices.set(slice, tuple);
});
if (slices.size() < sliceSet.size) {
sliceSet.forEach((tuple, slice) => {
const mutSlice = slice as Slice | MutableSlice;
if ((<MutableSlice>mutSlice).isDel) {
if (!(<MutableSlice>mutSlice).isDel()) return;
this.delSlice(slice, tuple);
}
});
}
}
return state;
}
private insSlice(slice: Slice<T>): [start: OverlayPoint<T>, end: OverlayPoint<T>] {
const x0 = slice.start;
const x1 = slice.end;
const [start, isStartNew] = this.upsertPoint(x0);
const [end, isEndNew] = this.upsertPoint(x1);
const isCollapsed = x0.cmp(x1) === 0;
start.refs.push(new OverlayRefSliceStart(slice));
end.refs.push(new OverlayRefSliceEnd(slice));
if (isStartNew) {
const beforeStartPoint = prev(start);
if (beforeStartPoint) start.layers.push(...beforeStartPoint.layers);
}
if (!isCollapsed) {
if (isEndNew) {
const beforeEndPoint = prev(end);
if (beforeEndPoint) end.layers.push(...beforeEndPoint.layers);
}
let curr: OverlayPoint<T> | undefined = start;
do curr.addLayer(slice);
while ((curr = next(curr)) && curr !== end);
} else start.addMarker(slice);
return [start, end];
}
private insMarker(slice: MarkerSlice<T>): [start: OverlayPoint<T>, end: OverlayPoint<T>] {
const point = this.mPoint(slice, Anchor.Before);
const pivot = this.insPoint(point);
if (!pivot) {
point.refs.push(slice);
const prevPoint = prev(point);
if (prevPoint) point.layers.push(...prevPoint.layers);
}
return [point, point];
}
private delSlice(slice: Slice<T>, [start, end]: [start: OverlayPoint<T>, end: OverlayPoint<T>]): void {
this.slices.delete(slice);
let curr: OverlayPoint<T> | undefined = start;
do {
curr.removeLayer(slice);
curr.removeMarker(slice);
curr = next(curr);
} while (curr && curr !== end);
start.removeRef(slice);
end.removeRef(slice);
if (!start.refs.length) this.delPoint(start);
if (!end.refs.length && start !== end) this.delPoint(end);
}
/**
* Retrieve an existing {@link OverlayPoint} or create a new one, inserted
* in the tree, sorted by spatial dimension.
*/
private upsertPoint(point: Point<T>): [point: OverlayPoint<T>, isNew: boolean] {
const newPoint = this.point(point.id, point.anchor);
const pivot = this.insPoint(newPoint);
if (pivot) return [pivot, false];
return [newPoint, true];
}
/**
* Inserts a point into the tree, sorted by spatial dimension.
* @param point Point to insert.
* @returns Returns the existing point if it was already in the tree.
*/
private insPoint(point: OverlayPoint<T>): OverlayPoint<T> | undefined {
if (point instanceof MarkerOverlayPoint) {
this.root2 = insert2(this.root2, point, spatialComparator);
// if (this.root2 !== point) this.root2 = splay2(this.root2!, point, 10);
}
let pivot = this.getOrNextLower(point);
if (!pivot) pivot = first(this.root);
if (!pivot) {
this.root = point;
return;
} else {
if (pivot.cmp(point) === 0) return pivot;
const cmp = pivot.cmpSpatial(point);
if (cmp < 0) insertRight(point, pivot);
else insertLeft(point, pivot);
}
if (this.root !== point) this.root = splay(this.root!, point, 10);
return;
}
private delPoint(point: OverlayPoint<T>): void {
if (point instanceof MarkerOverlayPoint) this.root2 = remove2(this.root2, point);
this.root = remove(this.root, point);
}
public leadingTextHash: number = 0;
protected refreshTextSlices(stateTotal: number): number {
const txt = this.txt;
const str = txt.str;
const firstChunk = str.first();
if (!firstChunk) return stateTotal;
let chunk: Chunk<T> | undefined = firstChunk;
let marker: MarkerOverlayPoint<T> | undefined = undefined;
const i = this.tuples0(undefined);
let state: number = CONST.START_STATE;
for (let pair = i(); pair; pair = i()) {
const [p1, p2] = pair;
const id1 = p1.id;
state = (state << 5) + state + (id1.sid >>> 0) + id1.time;
let overlayPointHash = CONST.START_STATE;
chunk = this.chunkSlices0(chunk || firstChunk, p1, p2, (chunk, off, len) => {
const id = chunk.id;
overlayPointHash =
(overlayPointHash << 5) + overlayPointHash + ((((id.sid >>> 0) + id.time) << 8) + (off << 4) + len);
});
state = updateNum(state, overlayPointHash);
for (const slice of p1.layers) state = updateNum(state, slice.hash);
for (const slice of p1.markers) state = updateNum(state, slice.hash);
p1.hash = overlayPointHash;
stateTotal = updateNum(stateTotal, overlayPointHash);
if (p2 instanceof MarkerOverlayPoint) {
if (marker) {
marker.textHash = state;
} else {
this.leadingTextHash = state;
}
stateTotal = updateNum(stateTotal, state);
state = CONST.START_STATE;
marker = p2;
}
}
if ((marker as any) instanceof MarkerOverlayPoint) {
(marker as any as MarkerOverlayPoint<T>).textHash = state;
} else {
this.leadingTextHash = state;
}
return stateTotal;
}
// ---------------------------------------------------------------- Printable
public toString(tab: string = ''): string {
const printPoint = (tab: string, point: OverlayPoint<T>): string => {
return (
point.toString(tab) +
printBinary(tab, [
!point.l ? null : (tab) => printPoint(tab, point.l!),
!point.r ? null : (tab) => printPoint(tab, point.r!),
])
);
};
const printMarkerPoint = (tab: string, point: MarkerOverlayPoint<T>): string => {
return (
point.toString(tab) +
printBinary(tab, [
!point.l2 ? null : (tab) => printMarkerPoint(tab, point.l2!),
!point.r2 ? null : (tab) => printMarkerPoint(tab, point.r2!),
])
);
};
return (
`Overlay #${this.hash.toString(36)}` +
printTree(tab, [
!this.root ? null : (tab) => printPoint(tab, this.root!),
!this.root2 ? null : (tab) => printMarkerPoint(tab, this.root2!),
])
);
}
}
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