// Demonstrates querying top-level desktop windows and interacting with a

// selected target window.

import 'dart:ffi';

import 'package:ffi/ffi.dart';

import 'package:win32/win32.dart';

final class DesktopWindow {

const DesktopWindow(this.hWnd, this.title);

final HWND hWnd;

final String title;

/// Brings the window to the foreground and restores it if minimized.

void activate() {

if (IsIconic(hWnd)) {

ShowWindow(hWnd, SW_RESTORE);

}

SetForegroundWindow(hWnd);

}

@override

String toString() => 'DesktopWindow(hWnd: $hWnd, title: $title)';

}

/// Enumerates all visible top-level windows.

List<DesktopWindow> enumerateDesktopWindows() {

final results = <DesktopWindow>[];

final callback = NativeCallable<WNDENUMPROC>.isolateLocal((

Pointer hWnd,

int lParam,

) {

final hwnd = HWND(hWnd);

if (!IsWindowVisible(hwnd)) return TRUE;

final length = GetWindowTextLength(hwnd).value;

if (length == 0) return TRUE;

using((arena) {

final buffer = arena.pwstrBuffer(length + 1);

if (GetWindowText(hwnd, buffer, length + 1).value != 0) {

results.add(DesktopWindow(hwnd, buffer.toDartString()));

}

});

return TRUE;

}, exceptionalReturn: 0);

EnumWindows(callback.nativeFunction, const .new(0));

callback.close();

return results;

}

/// Finds the first window whose title contains [keyword].

DesktopWindow? findWindowByTitle(List<DesktopWindow> windows, String keyword) {

final lower = keyword.toLowerCase();

for (final window in windows) {

if (window.title.toLowerCase().contains(lower)) {

return window;

}

}

return null;

}

void main() {

final windows = enumerateDesktopWindows();

print('Visible windows:');

for (final window in windows) {

print('• $window');

}

// Change this keyword to target a different window.

const targetKeyword = 'Visual Studio Code';

final target = findWindowByTitle(windows, targetKeyword);

if (target == null) {

print('No window found containing "$targetKeyword".');

return;

}

print('Activating window: "$target"');

target.activate();

}