앱을 종료할 때 - 전체 화면 모드 상태 여부, 화면 크기, 화면 위치 정보를 저장

AGENTS.md

@@ -29,6 +29,7 @@ assets/
 src/
 ├── main/
 │   ├── index.js          # Main process entry point; app.setName(), BrowserWindow, registerAll()
+│   ├── config.js         # Shared userData/config.json read/write helpers
 │   └── ipc/
 │       ├── index.js      # registerAll(mainWindow) — delegates to folder and files modules
 │       ├── file-utils.js # Shared main-process file helpers: image listing/data URLs,
@@ -189,4 +190,4 @@ Global shortcuts are registered in `keyboard.js`. They do not fire while any `.m
 
 **Build output:** `electron-builder` targets DMG for arm64 and x64.
 
-**Config persistence:** `app.getPath('userData')/config.json`에 `lastFolder`, `previewOn` 저장.
+**Config persistence:** `app.getPath('userData')/config.json`에 `lastFolder`, `previewOn`, `sidebarWidth`, `windowState` 저장. `windowState` includes fullscreen status and normal window bounds (`x`, `y`, `width`, `height`) and is restored on startup if the saved bounds overlap an available display.

src/main/config.js

@@ -0,0 +1,31 @@
+const { app } = require('electron');
+const path = require('path');
+const fs = require('fs');
+
+const configPath = path.join(app.getPath('userData'), 'config.json');
+
+function readConfig() {
+  try {
+    return JSON.parse(fs.readFileSync(configPath, 'utf8'));
+  } catch {
+    return {};
+  }
+}
+
+function writeConfig(data) {
+  try {
+    fs.writeFileSync(configPath, JSON.stringify(data, null, 2));
+  } catch {}
+}
+
+function updateConfig(updater) {
+  const cfg = readConfig();
+  updater(cfg);
+  writeConfig(cfg);
+}
+
+module.exports = {
+  readConfig,
+  updateConfig,
+  writeConfig,
+};

src/main/index.js

@@ -1,15 +1,19 @@
-const { app, BrowserWindow } = require('electron');
+const { app, BrowserWindow, screen } = require('electron');
 const path = require('path');
 const { registerAll } = require('./ipc');
+const { readConfig, updateConfig } = require('./config');
 
 app.setName('Photo Renamer');
 
 let mainWindow;
 
 function createWindow() {
+  const windowState = getSavedWindowState();
   mainWindow = new BrowserWindow({
-    width: 1200,
+    x: windowState.bounds?.x,
-    height: 820,
+    y: windowState.bounds?.y,
+    width: windowState.bounds?.width || 1200,
+    height: windowState.bounds?.height || 820,
     minWidth: 900,
     minHeight: 600,
     titleBarStyle: 'hiddenInset',
@@ -27,8 +31,11 @@ function createWindow() {
 
   mainWindow.once('ready-to-show', () => {
     mainWindow.show();
+    if (windowState.isFullScreen) mainWindow.setFullScreen(true);
   });
 
+  mainWindow.on('close', saveWindowState);
+
   mainWindow.on('enter-full-screen', () => {
     mainWindow.webContents.send('fullscreen-change', true);
   });
@@ -37,6 +44,40 @@ function createWindow() {
   });
 }
 
+function getSavedWindowState() {
+  const cfg = readConfig();
+  const state = cfg.windowState || {};
+  const bounds = isUsableBounds(state.bounds) ? state.bounds : null;
+  return {
+    bounds,
+    isFullScreen: state.isFullScreen === true,
+  };
+}
+
+function isUsableBounds(bounds) {
+  if (!bounds) return false;
+  const values = [bounds.x, bounds.y, bounds.width, bounds.height];
+  if (!values.every(Number.isFinite)) return false;
+  if (bounds.width < 900 || bounds.height < 600) return false;
+  return screen.getAllDisplays().some(display => rectanglesOverlap(bounds, display.workArea));
+}
+
+function rectanglesOverlap(a, b) {
+  return a.x < b.x + b.width &&
+         a.x + a.width > b.x &&
+         a.y < b.y + b.height &&
+         a.y + a.height > b.y;
+}
+
+function saveWindowState() {
+  if (!mainWindow) return;
+  const isFullScreen = mainWindow.isFullScreen();
+  const bounds = isFullScreen ? mainWindow.getNormalBounds() : mainWindow.getBounds();
+  updateConfig(cfg => {
+    cfg.windowState = { isFullScreen, bounds };
+  });
+}
+
 app.whenReady().then(() => {
   createWindow();
   registerAll(mainWindow);

src/main/ipc/folder.js

@@ -1,16 +1,8 @@
-const { ipcMain, dialog, app, shell } = require('electron');
+const { ipcMain, dialog, shell } = require('electron');
 const path = require('path');
 const fs = require('fs');
 const os = require('os');
-
+const { readConfig, updateConfig } = require('../config');
-const configPath = path.join(app.getPath('userData'), 'config.json');
-
-function readConfig() {
-  try { return JSON.parse(fs.readFileSync(configPath, 'utf8')); } catch { return {}; }
-}
-function writeConfig(data) {
-  try { fs.writeFileSync(configPath, JSON.stringify(data, null, 2)); } catch {}
-}
 
 function register(mainWindow) {
   ipcMain.handle('select-folder', async () => {
@@ -33,9 +25,7 @@ function register(mainWindow) {
   });
 
   ipcMain.handle('set-last-folder', (_e, folderPath) => {
-    const cfg = readConfig();
+    updateConfig(cfg => { cfg.lastFolder = folderPath; });
-    cfg.lastFolder = folderPath;
-    writeConfig(cfg);
   });
 
   ipcMain.handle('list-directories', (_e, folderPath) => {
@@ -64,9 +54,7 @@ function register(mainWindow) {
   });
 
   ipcMain.handle('set-preview-on', (_e, on) => {
-    const cfg = readConfig();
+    updateConfig(cfg => { cfg.previewOn = on; });
-    cfg.previewOn = on;
-    writeConfig(cfg);
   });
 
   ipcMain.handle('get-sidebar-width', () => {
@@ -75,9 +63,7 @@ function register(mainWindow) {
   });
 
   ipcMain.handle('set-sidebar-width', (_e, width) => {
-    const cfg = readConfig();
+    updateConfig(cfg => { cfg.sidebarWidth = width; });
-    cfg.sidebarWidth = width;
-    writeConfig(cfg);
   });
 }