@lexical/history/LexicalHistory.prod.mjs

This package contains selection history helpers for Lexical.

/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

import{mergeRegister as t}from"@lexical/utils";import{UNDO_COMMAND as e,COMMAND_PRIORITY_EDITOR as n,REDO_COMMAND as r,CLEAR_EDITOR_COMMAND as o,CLEAR_HISTORY_COMMAND as i,CAN_REDO_COMMAND as c,CAN_UNDO_COMMAND as s,HISTORIC_TAG as a,HISTORY_PUSH_TAG as u,HISTORY_MERGE_TAG as d,$isRangeSelection as l,$isTextNode as f,$isRootNode as p}from"lexical";const m=0,h=1,_=2,g=0,S=1,k=2,y=3,C=4;function x(t,e,n,r,o){if(null===t||0===n.size&&0===r.size&&!o)return g;const i=e._selection,c=t._selection;if(o)return S;if(!(l(i)&&l(c)&&c.isCollapsed()&&i.isCollapsed()))return g;const s=function(t,e,n){const r=t._nodeMap,o=[];for(const t of e){const e=r.get(t);void 0!==e&&o.push(e)}for(const[t,e]of n){if(!e)continue;const n=r.get(t);void 0===n||p(n)||o.push(n)}return o}(e,n,r);if(0===s.length)return g;if(s.length>1){const n=e._nodeMap,r=n.get(i.anchor.key),o=n.get(c.anchor.key);return r&&o&&!t._nodeMap.has(r.__key)&&f(r)&&1===r.__text.length&&1===i.anchor.offset?k:g}const a=s[0],u=t._nodeMap.get(a.__key);if(!f(u)||!f(a)||u.__mode!==a.__mode)return g;const d=u.__text,m=a.__text;if(d===m)return g;const h=i.anchor,_=c.anchor;if(h.key!==_.key||"text"!==h.type)return g;const x=h.offset,M=_.offset,z=m.length-d.length;return 1===z&&M===x-1?k:-1===z&&M===x+1?y:-1===z&&M===x?C:g}function M(t,e){let n=Date.now(),r=g;return(o,i,c,s,p,S)=>{const k=Date.now();if(S.has(a))return r=g,n=k,_;const y=x(o,i,s,p,t.isComposing()),C=(()=>{const a=null===c||c.editor===t,C=S.has(u);if(!C&&a&&S.has(d))return m;if(null===o)return h;const x=i._selection;if(!(s.size>0||p.size>0))return null!==x?m:_;if(!1===C&&y!==g&&y===r&&k<n+e&&a)return m;if(1===s.size){if(function(t,e,n){const r=e._nodeMap.get(t),o=n._nodeMap.get(t),i=e._selection,c=n._selection;return!(l(i)&&l(c)&&"element"===i.anchor.type&&"element"===i.focus.type&&"text"===c.anchor.type&&"text"===c.focus.type||!f(r)||!f(o)||r.__parent!==o.__parent)&&JSON.stringify(e.read((()=>r.exportJSON())))===JSON.stringify(n.read((()=>o.exportJSON())))}(Array.from(s)[0],o,i))return m}return h})();return n=k,r=y,C}}function z(t){t.undoStack=[],t.redoStack=[],t.current=null}function v(u,d,l){const f=M(u,l),p=t(u.registerCommand(e,(()=>(function(t,e){const n=e.redoStack,r=e.undoStack;if(0!==r.length){const o=e.current,i=r.pop();null!==o&&(n.push(o),t.dispatchCommand(c,!0)),0===r.length&&t.dispatchCommand(s,!1),e.current=i||null,i&&i.editor.setEditorState(i.editorState,{tag:a})}}(u,d),!0)),n),u.registerCommand(r,(()=>(function(t,e){const n=e.redoStack,r=e.undoStack;if(0!==n.length){const o=e.current;null!==o&&(r.push(o),t.dispatchCommand(s,!0));const i=n.pop();0===n.length&&t.dispatchCommand(c,!1),e.current=i||null,i&&i.editor.setEditorState(i.editorState,{tag:a})}}(u,d),!0)),n),u.registerCommand(o,(()=>(z(d),!1)),n),u.registerCommand(i,(()=>(z(d),u.dispatchCommand(c,!1),u.dispatchCommand(s,!1),!0)),n),u.registerUpdateListener((({editorState:t,prevEditorState:e,dirtyLeaves:n,dirtyElements:r,tags:o})=>{const i=d.current,a=d.redoStack,l=d.undoStack,p=null===i?null:i.editorState;if(null!==i&&t===p)return;const m=f(e,t,i,n,r,o);if(m===h)0!==a.length&&(d.redoStack=[],u.dispatchCommand(c,!1)),null!==i&&(l.push({...i}),u.dispatchCommand(s,!0));else if(m===_)return;d.current={editor:u,editorState:t}})));return p}function E(){return{current:null,redoStack:[],undoStack:[]}}export{E as createEmptyHistoryState,v as registerHistory};