@vericus/slate-kit-history/lib/slate-kit-history.es.js

plugin that group together history of selections to the next editing event on slate for undo/redo

import hotkeys from 'slate-hotkeys';

function handleUndo(editor) {
  if (!editor.hasUndo()) return;
  editor.undo();

  if (editor.props.onUndo && typeof editor.props.onUndo === "function") {
    editor.props.onUndo(editor.operations.filter(function (operation) {
      return !!(operation && operation.type !== "set_value");
    }));
  }
}

function handleRedo(editor) {
  if (!editor.hasRedo()) return;
  editor.redo();

  if (editor.props.onRedo && typeof editor.props.onRedo === "function") {
    editor.props.onRedo(editor.operations.filter(function (operation) {
      return !!(operation && operation.type !== "set_value");
    }));
  }
}

function createCommands() {
  return {
    handleUndo: handleUndo,
    handleRedo: handleRedo
  };
}

function hasRedo(editor, value) {
  var redos = value ? value.data.get("redos") : editor.value.data.get("redos");
  return !(redos && redos.filter(function (redo) {
    return !(redo.size === 1 && redo.get(0).type === "set_selection");
  }).isEmpty());
}

function hasUndo(editor, value) {
  var undos = value ? value.data.get("undos") : editor.value.data.get("undos");
  return !(undos && undos.filter(function (undo) {
    return !(undo.size === 1 && (undo.get(0).type === "set_selection" || undo.get(0).type === "set_value"));
  }).isEmpty());
}

function isRedo(prevValue, currValue) {
  var currRedos = currValue.data.get("redos");
  var prevRedos = prevValue.data.get("redos");
  return prevRedos.size > currRedos.size;
}

function isUndo(prevValue, currValue) {
  var currUndos = currValue.data.get("undos");
  var prevUndos = prevValue.data.get("undos");
  return prevUndos.size > currUndos.size;
}

function createQueries() {
  return {
    hasRedo: hasRedo,
    hasUndo: hasUndo,
    isRedo: function isRedo$1(editor, prevValue, currValue) {
      return isRedo(prevValue, currValue);
    },
    isUndo: function isUndo$1(editor, prevValue, currValue) {
      return isUndo(prevValue, currValue);
    }
  };
}

function History() {
  var queries = createQueries();
  var commands = createCommands();

  function onKeyDown(e, editor, next) {
    if (hotkeys.isUndo(e)) {
      return editor.handleUndo();
    }

    if (hotkeys.isRedo(e)) {
      return editor.handleRedo();
    }

    return next();
  }

  return {
    commands: commands,
    queries: queries,
    onKeyDown: onKeyDown
  };
}

export default History;
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