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| 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 | 1x 1x 1x 6x 1x 7x 12x 6x 6x 4x 4x 3x 6x 1x 1x 1x 1x | import {type Descendant, Text, Element as SlateElement, Node} from 'slate';
import type {CustomElement, SlateEditorDocument} from '../types';
export type OutlineHeadingType = 'title' | 'h1' | 'h2' | 'h3' | 'h4' | 'h5' | 'h6';
export interface DocumentOutlineItem {
key: string;
path: number[];
type: OutlineHeadingType;
level: 0 | 1 | 2 | 3 | 4 | 5 | 6;
title: string;
}
const HEADING_LEVELS: Record<OutlineHeadingType, DocumentOutlineItem['level']> = {
title: 0,
h1: 1,
h2: 2,
h3: 3,
h4: 4,
h5: 5,
h6: 6,
};
const isOutlineHeadingType = (type: CustomElement['type']): type is OutlineHeadingType =>
type === 'h1' ||
type === 'h2' ||
type === 'h3' ||
type === 'h4' ||
type === 'h5' ||
type === 'h6' ||
type === 'title';
const collectDocumentOutline = (nodes: Descendant[], path: number[], outline: DocumentOutlineItem[]): void => {
nodes.forEach((node, index) => {
if (Text.isText(node)) return;
const nodePath = [...path, index];
if (SlateElement.isElement(node) && isOutlineHeadingType(node.type)) {
const title = Node.string(node).trim();
if (title) {
outline.push({
key: nodePath.join('.'),
path: nodePath,
type: node.type,
level: HEADING_LEVELS[node.type],
title,
});
}
}
collectDocumentOutline(node.children as Descendant[], nodePath, outline);
});
};
export const getDocumentOutline = (value: SlateEditorDocument): DocumentOutlineItem[] => {
const outline: DocumentOutlineItem[] = [];
collectDocumentOutline(value, [], outline);
return outline;
};
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