import { Plugin, PluginKey, Selection } from "./../../pm/state.js";
import { CommandManager } from "../command-manager.js";
import { Extension } from "../extension.js";
import { createChainableState } from "../helpers/create-chainable-state.js";
import { isNodeEmpty } from "../helpers/is-node-empty.js";
import { isiOS } from "../utilities/is-ios.js";
import { isMacOS } from "../utilities/is-mac-os.js";
const Keymap = Extension.create({
  name: "keymap",
  addKeyboardShortcuts() {
    const handleBackspace = () => this.editor.commands.first(({ commands }) => [
      () => commands.undoInputRule(),
      // maybe convert first text block node to default node
      () => commands.command(({ tr }) => {
        const { selection, doc } = tr;
        const { empty, $anchor } = selection;
        const { pos, parent } = $anchor;
        const $parentPos = $anchor.parent.isTextblock && pos > 0 ? tr.doc.resolve(pos - 1) : $anchor;
        const parentIsIsolating = $parentPos.parent.type.spec.isolating;
        const parentPos = $anchor.pos - $anchor.parentOffset;
        const isAtStart = parentIsIsolating && $parentPos.parent.childCount === 1 ? parentPos === $anchor.pos : Selection.atStart(doc).from === pos;
        if (!empty || !parent.type.isTextblock || parent.textContent.length || !isAtStart || isAtStart && $anchor.parent.type.name === "paragraph") {
          return false;
        }
        return commands.clearNodes();
      }),
      () => commands.deleteSelection(),
      () => commands.joinBackward(),
      () => commands.selectNodeBackward()
    ]);
    const handleDelete = () => this.editor.commands.first(({ commands }) => [
      () => commands.deleteSelection(),
      () => commands.deleteCurrentNode(),
      () => commands.joinForward(),
      () => commands.selectNodeForward()
    ]);
    const handleEnter = () => this.editor.commands.first(({ commands }) => [
      () => commands.newlineInCode(),
      () => commands.createParagraphNear(),
      () => commands.liftEmptyBlock(),
      () => commands.splitBlock()
    ]);
    const baseKeymap = {
      Enter: handleEnter,
      "Mod-Enter": () => this.editor.commands.exitCode(),
      Backspace: handleBackspace,
      "Mod-Backspace": handleBackspace,
      "Shift-Backspace": handleBackspace,
      Delete: handleDelete,
      "Mod-Delete": handleDelete,
      "Mod-a": () => this.editor.commands.selectAll()
    };
    const pcKeymap = {
      ...baseKeymap
    };
    const macKeymap = {
      ...baseKeymap,
      "Ctrl-h": handleBackspace,
      "Alt-Backspace": handleBackspace,
      "Ctrl-d": handleDelete,
      "Ctrl-Alt-Backspace": handleDelete,
      "Alt-Delete": handleDelete,
      "Alt-d": handleDelete,
      "Ctrl-a": () => this.editor.commands.selectTextblockStart(),
      "Ctrl-e": () => this.editor.commands.selectTextblockEnd()
    };
    if (isiOS() || isMacOS()) {
      return macKeymap;
    }
    return pcKeymap;
  },
  addProseMirrorPlugins() {
    return [
      // With this plugin we check if the whole document was selected and deleted.
      // In this case we will additionally call `clearNodes()` to convert e.g. a heading
      // to a paragraph if necessary.
      // This is an alternative to ProseMirror's `AllSelection`, which doesn’t work well
      // with many other commands.
      new Plugin({
        key: new PluginKey("clearDocument"),
        appendTransaction: (transactions, oldState, newState) => {
          const docChanges = transactions.some((transaction) => transaction.docChanged) && !oldState.doc.eq(newState.doc);
          const ignoreTr = transactions.some(
            (transaction) => transaction.getMeta("preventClearDocument")
          );
          if (!docChanges || ignoreTr) {
            return;
          }
          const { empty, from, to } = oldState.selection;
          const allFrom = Selection.atStart(oldState.doc).from;
          const allEnd = Selection.atEnd(oldState.doc).to;
          const allWasSelected = from === allFrom && to === allEnd;
          if (empty || !allWasSelected) {
            return;
          }
          const isEmpty = isNodeEmpty(newState.doc);
          if (!isEmpty) {
            return;
          }
          const tr = newState.tr;
          const state = createChainableState({
            state: newState,
            transaction: tr
          });
          const { commands } = new CommandManager({
            editor: this.editor,
            state
          });
          commands.clearNodes();
          if (!tr.steps.length) {
            return;
          }
          return tr;
        }
      })
    ];
  }
});
export {
  Keymap
};
//# sourceMappingURL=keymap.js.map
