| 1 | import { BaseTocPlugin, isHeading, type Heading } from "@platejs/toc"; |
| 2 | import { cva } from "class-variance-authority"; |
| 3 | import { |
| 4 | NodeApi, |
| 5 | type NodeEntry, |
| 6 | type SlateEditor, |
| 7 | type TElement, |
| 8 | } from "platejs"; |
| 9 | import { SlateElement, type SlateElementProps } from "platejs/static"; |
| 10 | |
| 11 | import { Button } from "@/components/plate/ui/button"; |
| 12 | |
| 13 | const headingItemVariants = cva( |
| 14 | "block h-auto w-full cursor-pointer truncate rounded-none px-0.5 py-1.5 text-left font-medium text-muted-foreground underline decoration-[0.5px] underline-offset-4 hover:bg-accent hover:text-muted-foreground", |
| 15 | { |
| 16 | variants: { |
| 17 | depth: { |
| 18 | 1: "pl-0.5", |
| 19 | 2: "pl-6.5", |
| 20 | 3: "pl-12.5", |
| 21 | }, |
| 22 | }, |
| 23 | }, |
| 24 | ); |
| 25 | |
| 26 | export function TocElementStatic(props: SlateElementProps) { |
| 27 | const { editor } = props; |
| 28 | const headingList = getHeadingList(editor); |
| 29 | |
| 30 | return ( |
| 31 | <SlateElement {...props} className="mb-1 p-0"> |
| 32 | <div> |
| 33 | {headingList.length > 0 ? ( |
| 34 | headingList.map((item) => ( |
| 35 | <Button |
| 36 | key={item.title} |
| 37 | variant="ghost" |
| 38 | className={headingItemVariants({ |
| 39 | depth: item.depth as 1 | 2 | 3, |
| 40 | })} |
| 41 | > |
| 42 | {item.title} |
| 43 | </Button> |
| 44 | )) |
| 45 | ) : ( |
| 46 | <div className="text-sm text-gray-500"> |
| 47 | Create a heading to display the table of contents. |
| 48 | </div> |
| 49 | )} |
| 50 | </div> |
| 51 | {props.children} |
| 52 | </SlateElement> |
| 53 | ); |
| 54 | } |
| 55 | |
| 56 | const headingDepth: Record<string, number> = { |
| 57 | h1: 1, |
| 58 | h2: 2, |
| 59 | h3: 3, |
| 60 | h4: 4, |
| 61 | h5: 5, |
| 62 | h6: 6, |
| 63 | }; |
| 64 | |
| 65 | const getHeadingList = (editor?: SlateEditor) => { |
| 66 | if (!editor) return []; |
| 67 | |
| 68 | const options = editor.getOptions(BaseTocPlugin); |
| 69 | |
| 70 | if (options.queryHeading) { |
| 71 | return options.queryHeading(editor); |
| 72 | } |
| 73 | |
| 74 | const headingList: Heading[] = []; |
| 75 | |
| 76 | const values = Array.from( |
| 77 | editor.api.nodes({ |
| 78 | at: [], |
| 79 | match: (n) => isHeading(n), |
| 80 | }), |
| 81 | ) as NodeEntry<TElement>[]; |
| 82 | |
| 83 | Array.from(values, ([node, path]) => { |
| 84 | const { type } = node; |
| 85 | const title = NodeApi.string(node); |
| 86 | const depth = headingDepth[type]!; |
| 87 | const id = node.id as string; |
| 88 | |
| 89 | if (title) { |
| 90 | headingList.push({ id, depth, path, title, type }); |
| 91 | } |
| 92 | }); |
| 93 | |
| 94 | return headingList; |
| 95 | }; |
| 96 |