Andres
34 lines
962 B
JavaScript
34 lines
962 B
JavaScript
import { ParentMessage } from '../constants/messages.js';
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import { undo, redo } from '../state/history-state.js';
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import { notifyDraftStateChanged } from '../api/draft-snapshot.js';
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/**
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* Applies one undo/redo step and notifies the parent frame when an action ran.
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* @param {'undo'|'redo'} direction
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* @returns {object|null}
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*/
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function applySessionHistoryStep(direction) {
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const action = direction === 'undo' ? undo() : redo();
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if (!action) return null;
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notifyDraftStateChanged(
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direction === 'undo' ? ParentMessage.EDIT_UNDO_APPLIED : ParentMessage.EDIT_REDO_APPLIED,
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{
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editId: action.editId,
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value: direction === 'undo' ? action.instruction.beforeContent : action.instruction.afterContent,
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},
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);
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return action;
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}
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/** @returns {object|null} */
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export function applySessionUndo() {
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return applySessionHistoryStep('undo');
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}
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/** @returns {object|null} */
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export function applySessionRedo() {
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return applySessionHistoryStep('redo');
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}
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