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import {NodeApi} from '../../json-crdt/model/api/nodes';
import {konst} from '../../json-crdt-patch/builder/Konst';
import {SliceStacking} from '../peritext/slice/constants';
import {PersistedSlice} from '../peritext/slice/PersistedSlice';
import {diffAttributes, getAttributes, removeErasures} from './util';
import type {PathStep} from '@jsonjoy.com/json-pointer';
import type {QuillDeltaNode} from './QuillDeltaNode';
import type {ArrApi, ArrNode, ExtApi, StrApi} from '../../json-crdt';
import type {
QuillDeltaAttributes,
QuillDeltaOpDelete,
QuillDeltaOpInsert,
QuillDeltaOpRetain,
QuillDeltaPatch,
} from './types';
import type {Peritext} from '../peritext';
import type {SliceNode} from '../peritext/slice/types';
const updateAttributes = (txt: Peritext, attributes: QuillDeltaAttributes | undefined, pos: number, len: number) => {
Iif (!attributes) return;
const range = txt.rangeAt(pos, len);
const keys = Object.keys(attributes);
const length = keys.length;
const savedSlices = txt.savedSlices;
for (let i = 0; i < length; i++) {
const key = keys[i];
const value = attributes[key];
if (value === null) {
savedSlices.ins(range, SliceStacking.Erase, key);
} else {
savedSlices.ins(range, SliceStacking.One, key, konst(value));
}
}
};
const rewriteAttributes = (txt: Peritext, attributes: QuillDeltaAttributes | undefined, pos: number, len: number) => {
Iif (typeof attributes !== 'object') return;
const range = txt.rangeAt(pos, len);
range.expand();
const slices = txt.overlay.findOverlapping(range);
const length = slices.size;
const relevantOverlappingButNotContained = new Set<PathStep>();
if (length) {
const savedSlices = txt.savedSlices;
// biome-ignore lint: slices is not iterable
slices.forEach((slice) => {
if (slice instanceof PersistedSlice) {
const isContained = range.contains(slice);
if (!isContained) {
relevantOverlappingButNotContained.add(slice.type as PathStep);
return;
}
const type = slice.type as PathStep;
if (type in attributes) {
savedSlices.del(slice.id);
}
}
});
}
const keys = Object.keys(attributes);
const attributeLength = keys.length;
const attributesCopy = {...attributes};
for (let i = 0; i < attributeLength; i++) {
const key = keys[i];
const value = attributes[key];
if (value === null && !relevantOverlappingButNotContained.has(key)) {
delete attributesCopy[key];
}
}
updateAttributes(txt, attributesCopy, pos, len);
};
const maybeUpdateAttributes = (
txt: Peritext,
attributes: QuillDeltaAttributes | undefined,
pos: number,
len: number,
): void => {
const range = txt.rangeAt(pos, 1);
const overlayPoint = txt.overlay.getOrNextLower(range.start);
if (!overlayPoint && !attributes) return;
if (!overlayPoint) {
updateAttributes(txt, removeErasures(attributes), pos, len);
return;
}
const pointAttributes = getAttributes(overlayPoint);
const attributeDiff = diffAttributes(pointAttributes, attributes);
if (attributeDiff) updateAttributes(txt, attributeDiff, pos, len);
};
export class QuillDeltaApi extends NodeApi<QuillDeltaNode> implements ExtApi<QuillDeltaNode> {
public text(): StrApi {
return this.api.wrap(this.node.text());
}
public slices(): ArrApi<ArrNode<SliceNode>> {
return this.api.wrap(this.node.slices());
}
public apply(ops: QuillDeltaPatch['ops']) {
const txt = this.node.txt;
const overlay = txt.overlay;
const length = ops.length;
let pos = 0;
for (let i = 0; i < length; i++) {
overlay.refresh(true);
const op = ops[i];
if (typeof (<QuillDeltaOpRetain>op).retain === 'number') {
const {retain, attributes} = <QuillDeltaOpRetain>op;
if (attributes) rewriteAttributes(txt, attributes, pos, retain);
pos += retain;
} else if (typeof (<QuillDeltaOpDelete>op).delete === 'number') {
txt.delAt(pos, (<QuillDeltaOpDelete>op).delete);
} else if ((<QuillDeltaOpInsert>op).insert) {
const {insert} = <QuillDeltaOpInsert>op;
let {attributes} = <QuillDeltaOpInsert>op;
if (typeof insert === 'string') {
txt.insAt(pos, insert);
const insertLength = insert.length;
maybeUpdateAttributes(txt, attributes, pos, insertLength);
pos += insertLength;
} else {
txt.insAt(pos, QuillConst.EmbedChar);
if (!attributes) attributes = {};
attributes[QuillConst.EmbedSliceType] = insert;
maybeUpdateAttributes(txt, attributes, pos, 1);
pos += 1;
}
}
}
}
}
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