93 lines
3.1 KiB
C#
93 lines
3.1 KiB
C#
using System;
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namespace Notify.Interop;
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/// <summary>
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/// 把目标窗口拉回前台
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///
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/// Windows 限制后台进程抢焦点，这里用一套组合技绕过：ALT 键模拟 +
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/// AttachThreadInput 把当前线程与前台/目标线程的输入队列挂接 +
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/// SetWindowPos/BringWindowToTop/SwitchToThisWindow/SetForegroundWindow 多管齐下
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/// </summary>
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public static class WindowActivator
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{
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public static bool Activate(IntPtr hwnd)
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{
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if (hwnd == IntPtr.Zero || !Win32.IsWindow(hwnd))
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{
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return false;
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}
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var root = Win32.GetAncestor(hwnd, Win32.GA_ROOT);
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if (root != IntPtr.Zero)
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{
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hwnd = root;
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}
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var foreground = Win32.GetForegroundWindow();
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var curThread = Win32.GetCurrentThreadId();
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var fgThread = Win32.GetWindowThreadProcessId(foreground, out _);
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var targetThread = Win32.GetWindowThreadProcessId(hwnd, out _);
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var attachedForeground = false;
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var attachedTarget = false;
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try
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{
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// 最小化的先还原
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if (Win32.IsIconic(hwnd))
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{
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Win32.ShowWindow(hwnd, Win32.SW_RESTORE);
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}
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// 模拟一次 ALT 抬起，满足 Windows 的"防焦点抢占"前置条件
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Win32.keybd_event(Win32.VK_MENU, 0, 0, IntPtr.Zero);
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Win32.keybd_event(Win32.VK_MENU, 0, Win32.KEYEVENTF_KEYUP, IntPtr.Zero);
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if (fgThread != curThread)
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{
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attachedForeground = Win32.AttachThreadInput(curThread, fgThread, true);
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}
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if (targetThread != curThread && targetThread != fgThread)
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{
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attachedTarget = Win32.AttachThreadInput(curThread, targetThread, true);
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}
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Win32.AllowSetForegroundWindow(Win32.ASFW_ANY);
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Win32.SetWindowPos(hwnd, IntPtr.Zero, 0, 0, 0, 0, Win32.SWP_NOMOVE | Win32.SWP_NOSIZE | Win32.SWP_SHOWWINDOW);
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Win32.BringWindowToTop(hwnd);
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Win32.SwitchToThisWindow(hwnd, true);
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Win32.SetForegroundWindow(hwnd);
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Win32.ShowWindow(hwnd, Win32.SW_SHOW);
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if (Win32.GetForegroundWindow() != hwnd)
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{
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Win32.SetWindowPos(hwnd, Win32.HWND_TOPMOST, 0, 0, 0, 0,
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Win32.SWP_NOMOVE | Win32.SWP_NOSIZE | Win32.SWP_SHOWWINDOW);
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Win32.SetWindowPos(hwnd, Win32.HWND_NOTOPMOST, 0, 0, 0, 0,
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Win32.SWP_NOMOVE | Win32.SWP_NOSIZE | Win32.SWP_SHOWWINDOW);
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Win32.BringWindowToTop(hwnd);
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Win32.SetForegroundWindow(hwnd);
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}
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return Win32.GetAncestor(Win32.GetForegroundWindow(), Win32.GA_ROOT) == hwnd;
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}
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catch
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{
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return false;
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}
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finally
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{
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if (attachedTarget)
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{
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Win32.AttachThreadInput(curThread, targetThread, false);
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}
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if (attachedForeground)
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{
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Win32.AttachThreadInput(curThread, fgThread, false);
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}
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}
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}
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}
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