// src/trailing-node/trailing-node.ts
import { Extension } from "@tiptap/core";
import { Plugin, PluginKey } from "@tiptap/pm/state";
function nodeEqualsType({ types, node }) {
  return node && Array.isArray(types) && types.includes(node.type) || (node == null ? void 0 : node.type) === types;
}
var TrailingNode = Extension.create({
  name: "trailingNode",
  addOptions() {
    return {
      node: "paragraph",
      notAfter: []
    };
  },
  addProseMirrorPlugins() {
    const plugin = new PluginKey(this.name);
    const disabledNodes = Object.entries(this.editor.schema.nodes).map(([, value]) => value).filter((node) => (this.options.notAfter || []).concat(this.options.node).includes(node.name));
    return [
      new Plugin({
        key: plugin,
        appendTransaction: (_, __, state) => {
          const { doc, tr, schema } = state;
          const shouldInsertNodeAtEnd = plugin.getState(state);
          const endPosition = doc.content.size;
          const type = schema.nodes[this.options.node];
          if (!shouldInsertNodeAtEnd) {
            return;
          }
          return tr.insert(endPosition, type.create());
        },
        state: {
          init: (_, state) => {
            const lastNode = state.tr.doc.lastChild;
            return !nodeEqualsType({ node: lastNode, types: disabledNodes });
          },
          apply: (tr, value) => {
            if (!tr.docChanged) {
              return value;
            }
            const lastNode = tr.doc.lastChild;
            return !nodeEqualsType({ node: lastNode, types: disabledNodes });
          }
        }
      })
    ];
  }
});
export {
  TrailingNode
};
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