Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 | 57x 57x 57x 57x 57x 57x 57x 3445x 3445x 3445x 157x 157x 157x 3445x 1848x 1848x 2584x 2584x 2584x 2584x 2584x 107x 107x 107x 107x 2584x 2584x 2584x 2584x 1848x 1848x 1848x 1848x 1848x 1848x 1848x 2627x 2627x 2627x 2584x 2584x 2584x 2584x | import {Block} from './Block';
import {commonLength} from '../util/commonLength';
import {printTree} from 'tree-dump/lib/printTree';
import {LeafBlock} from './LeafBlock';
import {Range} from '../rga/Range';
import {CommonSliceType} from '../slice';
import type {MarkerOverlayPoint} from '../overlay/MarkerOverlayPoint';
import type {Path} from '@jsonjoy.com/json-pointer';
import type {Stateful} from '../types';
import type {Printable} from 'tree-dump/lib/types';
import type {Peritext} from '../Peritext';
import type {Point} from '../rga/Point';
import type {PeritextMlElement} from './types';
/**
* A *fragment* represents a structural slice of a rich-text document. A
* fragment can be bound to a specific range of text contents, however it
* always constructs a tree of {@link Block}s, which represent the nested
* structure of the text contents.
*/
export class Fragment extends Range implements Printable, Stateful {
public readonly root: Block;
constructor(
public readonly txt: Peritext,
start: Point,
end: Point,
) {
super(txt.str, start, end);
this.root = new Block(txt, [], void 0, start, end);
}
// ------------------------------------------------------------------- export
public toJson(): PeritextMlElement {
const node = this.root.toJson();
node[0] = '';
return node;
}
// ---------------------------------------------------------------- Printable
public toString(tab: string = ''): string {
return 'Fragment' + printTree(tab, [(tab) => this.root.toString(tab)]);
}
// ----------------------------------------------------------------- Stateful
public hash: number = 0;
public refresh(): number {
this.build();
return (this.hash = this.root.refresh());
}
private insertBlock(parent: Block, path: Path, marker: undefined | MarkerOverlayPoint, end: Point = this.end): Block {
const txt = this.txt;
const common = commonLength(path, parent.path);
const start: Point = marker ? marker : this.start;
while (parent.path.length > common && parent.parent) parent = parent.parent as Block;
while (parent.path.length + 1 < path.length) {
const block = new Block(txt, path.slice(0, parent.path.length + 1), void 0, start, end);
block.parent = parent;
parent.children.push(block);
parent = block;
}
const block = new LeafBlock(txt, path, marker, start, end);
block.parent = parent;
parent.children.push(block);
return block;
}
protected build(): void {
const {root} = this;
root.children = [];
let parent = this.root;
const txt = this.txt;
const overlay = txt.overlay;
const iterator = overlay.markerPairs0(this.start, this.end);
let pair: ReturnType<typeof iterator>;
while ((pair = iterator())) {
const [p1, p2] = pair;
const skipFirstVirtualBlock = !p1 && this.start.isAbsStart() && p2 && p2.viewPos() === 0;
if (skipFirstVirtualBlock) continue;
const type = p1 ? p1.type() : CommonSliceType.p;
const path = type instanceof Array ? type : [type];
const block = this.insertBlock(parent, path, p1, p2);
if (block.parent) parent = block.parent;
}
}
}
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