51 lines
1.3 KiB
TypeScript
51 lines
1.3 KiB
TypeScript
import { Plugin } from "prosemirror-state";
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import { Decoration, DecorationSet } from "prosemirror-view";
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import Extension from "../lib/Extension";
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export default class Placeholder extends Extension {
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get name() {
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return "empty-placeholder";
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}
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get defaultOptions() {
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return {
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emptyNodeClass: "placeholder",
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placeholder: "",
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};
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}
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get plugins() {
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return [
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new Plugin({
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props: {
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decorations: (state) => {
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const { doc } = state;
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const decorations: Decoration[] = [];
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const completelyEmpty =
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doc.textContent === "" &&
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doc.childCount <= 1 &&
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doc.content.size <= 2;
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doc.descendants((node, pos) => {
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if (!completelyEmpty) {
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return;
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}
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if (pos !== 0 || node.type.name !== "paragraph") {
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return;
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}
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const decoration = Decoration.node(pos, pos + node.nodeSize, {
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class: this.options.emptyNodeClass,
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"data-empty-text": this.options.placeholder,
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});
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decorations.push(decoration);
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});
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return DecorationSet.create(doc, decorations);
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},
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},
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}),
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];
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}
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}
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