파일 삭제 기능 추가, undo / redo 기능에 적용

src/renderer/history.js

@@ -1,35 +1,62 @@
+// History entries
+//   reorder: { type:'reorder', files:[...], affectedPaths: Set|null }
+//   delete:  { type:'delete',  files:[...] /* filesAfter */,
+//              deletedEntries:[{name, originalPath, stagingPath}] /* mutable */ }
+
 const MAX = 50;
 let _stack    = [];
 let _cursor   = -1;
 let _onUpdate = null;
 
-export function setOnUpdate(fn) {
-  _onUpdate = fn;
+export function setOnUpdate(fn) { _onUpdate = fn; }
+
+// ── Push ─────────────────────────────────────────
+export function pushReorder(files, affectedPaths = null) {
+  _truncate();
+  _stack.push({
+    type: 'reorder',
+    files: [...files],
+    affectedPaths: affectedPaths ? new Set(affectedPaths) : null,
+  });
+  _finalize();
 }
 
-export function push(files, affectedPaths = null) {
-  _stack = _stack.slice(0, _cursor + 1);
-  _stack.push({ files: [...files], affectedPaths: affectedPaths ? new Set(affectedPaths) : null });
+export function pushDelete(filesAfter, deletedEntries) {
+  _truncate();
+  _stack.push({ type: 'delete', files: [...filesAfter], deletedEntries });
+  _finalize();
+}
+
+function _truncate() { _stack = _stack.slice(0, _cursor + 1); }
+function _finalize() {
   if (_stack.length > MAX) _stack.shift();
   _cursor = _stack.length - 1;
   _onUpdate?.();
 }
 
-// Returns { files, affectedPaths } where affectedPaths are from the entry being undone
+// ── Undo / Redo ───────────────────────────────────
+// Returns { entry, targetFiles }
+//   entry       — the entry being undone/redone (for type-specific side-effects)
+//   targetFiles — the files[] to restore in state
 export function undo() {
   if (!canUndo()) return null;
-  const affectedPaths = _stack[_cursor].affectedPaths;
+  const entry = _stack[_cursor]; // operation being undone
   --_cursor;
   _onUpdate?.();
-  return { files: [..._stack[_cursor].files], affectedPaths };
+  return { entry, targetFiles: [..._stack[_cursor].files] };
 }
 
-// Returns { files, affectedPaths } from the entry being redone
 export function redo() {
   if (!canRedo()) return null;
   ++_cursor;
   _onUpdate?.();
-  return { files: [..._stack[_cursor].files], affectedPaths: _stack[_cursor].affectedPaths };
+  const entry = _stack[_cursor];
+  return { entry, targetFiles: [...entry.files] };
+}
+
+// Peek at the next redo entry without moving cursor (for pre-processing)
+export function peekRedo() {
+  return canRedo() ? _stack[_cursor + 1] : null;
 }
 
 export function canUndo() { return _cursor > 0; }