mirror of
https://github.com/kangyu-california/PersistentWindows.git
synced 2025-05-11 04:55:39 +02:00
721 lines
29 KiB
C#
721 lines
29 KiB
C#
using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Threading;
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using Microsoft.Win32;
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using ManagedWinapi.Windows;
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using Ninjacrab.PersistentWindows.Common.Diagnostics;
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using Ninjacrab.PersistentWindows.Common.Models;
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using Ninjacrab.PersistentWindows.Common.WinApiBridge;
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namespace Ninjacrab.PersistentWindows.Common
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{
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public class PersistentWindowProcessor : IDisposable
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{
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// constant
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private const int RestoreLatency = 1000; // milliseconds to wait for second pass of window position recovery
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private const int MinCaptureLatency = 3000; // milliseconds to wait for window position capture, should be bigger than restoreLatency
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private const int MaxCaptureLatency = 30000; // milliseconds to wait for restore before capture OS initiated move
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private const int MaxUserMovePerSecond = 4; // maximum speed of window move/resize by human
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private const int MinOsMoveWindows = 5; // minimum number of moving windows to measure in order to recognize OS initiated move
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// window position database
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private Dictionary<string, Dictionary<string, ApplicationDisplayMetrics>> monitorApplications = null;
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// control shared by capture and restore
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private Timer captureTimer;
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private Timer restoreTimer;
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private Object databaseLock; // lock access to window position database
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private string validDisplayKeyForCapture = null;
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// capture control: window move/resize activity
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private int userMoves = 0; // user initiated window move/resize events
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private bool osMove = false; // window move/resize is initiated by OS
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private DateTime firstEventTime;
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private HashSet<IntPtr> pendingCaptureWindows = new HashSet<IntPtr>();
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// restore control
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private bool restoringWindowPos = false; // about to restore
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private IntPtr curRestoreHwnd = IntPtr.Zero; // current Hwnd being restored
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// callbacks
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private PowerModeChangedEventHandler powerModeChangedHandler;
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private EventHandler displaySettingsChangingHandler;
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private EventHandler displaySettingsChangedHandler;
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private SessionSwitchEventHandler sessionSwitchEventHandler;
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private readonly List<IntPtr> winEventHooks = new List<IntPtr>();
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private User32.WinEventDelegate winEventsCaptureDelegate;
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public void Start()
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{
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monitorApplications = new Dictionary<string, Dictionary<string, ApplicationDisplayMetrics>>();
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databaseLock = new object();
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firstEventTime = DateTime.Now;
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validDisplayKeyForCapture = GetDisplayKey();
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BeginCaptureApplicationsOnCurrentDisplays(initialCapture:true);
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captureTimer = new Timer(state =>
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{
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Log.Trace("Capture timer expired");
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BeginCaptureApplicationsOnCurrentDisplays();
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});
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restoreTimer = new Timer(state =>
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{
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Log.Trace("Restore timer expired");
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BeginRestoreApplicationsOnCurrentDisplays();
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});
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winEventsCaptureDelegate = WinEventProc;
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// captures new window, user click, snap and minimize
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this.winEventHooks.Add(User32.SetWinEventHook(
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User32Events.EVENT_SYSTEM_FOREGROUND,
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User32Events.EVENT_SYSTEM_FOREGROUND,
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IntPtr.Zero,
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winEventsCaptureDelegate,
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0,
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0,
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(uint)User32Events.WINEVENT_OUTOFCONTEXT));
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// captures user dragging
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this.winEventHooks.Add(User32.SetWinEventHook(
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User32Events.EVENT_SYSTEM_MOVESIZESTART,
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User32Events.EVENT_SYSTEM_MOVESIZEEND,
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IntPtr.Zero,
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winEventsCaptureDelegate,
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0,
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0,
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(uint)User32Events.WINEVENT_OUTOFCONTEXT));
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// captures user restore window
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this.winEventHooks.Add(User32.SetWinEventHook(
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User32Events.EVENT_SYSTEM_MINIMIZEEND, //window restored
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User32Events.EVENT_SYSTEM_MINIMIZEEND,
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IntPtr.Zero,
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winEventsCaptureDelegate,
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0,
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0,
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(uint)User32Events.WINEVENT_OUTOFCONTEXT));
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// capture both system and user move action
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this.winEventHooks.Add(User32.SetWinEventHook(
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User32Events.EVENT_OBJECT_LOCATIONCHANGE,
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User32Events.EVENT_OBJECT_LOCATIONCHANGE,
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IntPtr.Zero,
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winEventsCaptureDelegate,
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0,
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0,
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(uint)User32Events.WINEVENT_OUTOFCONTEXT));
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this.displaySettingsChangingHandler =
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(s, e) =>
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{
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DateTime date = DateTime.Now;
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Log.Info("Display settings changing {0}", date);
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CancelCaptureTimer();
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};
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SystemEvents.DisplaySettingsChanging += this.displaySettingsChangingHandler;
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this.displaySettingsChangedHandler =
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(s, e) =>
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{
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DateTime date = DateTime.Now;
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Log.Info("Display settings changed {0}", date);
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CancelCaptureTimer();
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restoringWindowPos = true;
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StartRestoreTimer();
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};
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SystemEvents.DisplaySettingsChanged += this.displaySettingsChangedHandler;
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powerModeChangedHandler =
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(s, e) =>
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{
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switch (e.Mode)
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{
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case PowerModes.Suspend:
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Log.Info("System suspending");
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CancelCaptureTimer();
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break;
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case PowerModes.Resume:
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Log.Info("System Resuming");
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CancelCaptureTimer();
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break;
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}
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};
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SystemEvents.PowerModeChanged += powerModeChangedHandler;
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sessionSwitchEventHandler = (sender, args) =>
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{
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switch (args.Reason)
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{
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case SessionSwitchReason.SessionLock:
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case SessionSwitchReason.RemoteDisconnect:
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case SessionSwitchReason.ConsoleDisconnect:
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Log.Trace("Session closing: reason {0}", args.Reason);
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CancelCaptureTimer();
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break;
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case SessionSwitchReason.SessionUnlock:
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case SessionSwitchReason.RemoteConnect:
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case SessionSwitchReason.ConsoleConnect:
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Log.Trace("Session opening: reason {0}", args.Reason);
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CancelCaptureTimer();
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break;
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}
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};
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SystemEvents.SessionSwitch += sessionSwitchEventHandler;
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}
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private void WinEventProc(IntPtr hWinEventHook, User32Events eventType, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime)
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{
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if (hwnd == this.curRestoreHwnd)
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{
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return; // ignore expected event to avoid message loop
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}
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var window = new SystemWindow(hwnd);
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if (!User32.IsTopLevelWindow(hwnd))
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{
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return;
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}
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if (window.Parent.HWnd.ToInt64() != 0 || !window.Visible || string.IsNullOrEmpty(window.Title))
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{
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// only track top level visible windows
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return;
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}
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/*
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Thread captureWindowThread = new Thread(() =>
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{
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*/
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try
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{
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Log.Trace("WinEvent received. Type: {0:x4}, Window: {1:x8}", (uint)eventType, hwnd.ToInt64());
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#if DEBUG
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RECT screenPosition = new RECT();
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User32.GetWindowRect(hwnd, ref screenPosition);
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string log = string.Format("Defer consumption of window move message of process {0} at ({1}, {2}) of size {3} x {4} with title: {5}",
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window.Process.ProcessName,
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screenPosition.Left,
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screenPosition.Top,
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screenPosition.Width,
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screenPosition.Height,
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window.Title
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);
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Log.Trace(log);
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#endif
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DateTime now = DateTime.Now;
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if (pendingCaptureWindows.Count() == 0)
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{
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firstEventTime = now;
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}
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pendingCaptureWindows.Add(hwnd);
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// figure out if all pending capture moves are OS initiated
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double elapsedMs = (now - firstEventTime).TotalMilliseconds;
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if (userMoves == 0
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&& pendingCaptureWindows.Count >= MinOsMoveWindows
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&& elapsedMs * MaxUserMovePerSecond / 1000 < pendingCaptureWindows.Count
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&& elapsedMs < MaxCaptureLatency)
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{
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osMove = true;
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Log.Trace("os move detected. user moves :{0}, total moved windows : {1}, elapsed milliseconds {2}",
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userMoves, pendingCaptureWindows.Count, elapsedMs);
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}
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if (restoringWindowPos)
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{
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if (eventType == User32Events.EVENT_SYSTEM_FOREGROUND)
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{
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return;
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}
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CancelCaptureTimer();
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// a new window move is initiated by OS instead of user during restore, restart restore timer
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StartRestoreTimer();
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}
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else
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{
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if (eventType != User32Events.EVENT_OBJECT_LOCATIONCHANGE)
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{
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userMoves++;
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}
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StartCaptureTimer();
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}
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}
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catch (Exception ex)
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{
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Log.Error(ex.ToString());
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}
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/*
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});
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captureWindowThread.IsBackground = false;
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captureWindowThread.Start();
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*/
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}
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private bool CaptureWindow(SystemWindow window, User32Events eventType, DateTime now, string displayKey)
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{
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bool ret = false;
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if (!monitorApplications.ContainsKey(displayKey))
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{
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monitorApplications.Add(displayKey, new Dictionary<string, ApplicationDisplayMetrics>());
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}
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ApplicationDisplayMetrics curDisplayMetrics = null;
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if (IsWindowMoved(displayKey, window, eventType, now, out curDisplayMetrics))
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{
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Log.Trace("Capturing windows for display setting {0}", displayKey);
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string log = string.Format("Captured {0,-8} at ({1}, {2}) of size {3} x {4} V:{5} {6} ",
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curDisplayMetrics,
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curDisplayMetrics.ScreenPosition.Left,
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curDisplayMetrics.ScreenPosition.Top,
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curDisplayMetrics.ScreenPosition.Width,
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curDisplayMetrics.ScreenPosition.Height,
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window.Visible,
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window.Title
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);
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string log2 = string.Format("\n WindowPlacement.NormalPosition at ({0}, {1}) of size {2} x {3}",
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curDisplayMetrics.WindowPlacement.NormalPosition.Left,
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curDisplayMetrics.WindowPlacement.NormalPosition.Top,
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curDisplayMetrics.WindowPlacement.NormalPosition.Width,
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curDisplayMetrics.WindowPlacement.NormalPosition.Height
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);
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Log.Trace(log + log2);
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if (!monitorApplications[displayKey].ContainsKey(curDisplayMetrics.Key))
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{
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monitorApplications[displayKey].Add(curDisplayMetrics.Key, curDisplayMetrics);
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}
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else
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{
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monitorApplications[displayKey][curDisplayMetrics.Key].WindowPlacement = curDisplayMetrics.WindowPlacement;
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monitorApplications[displayKey][curDisplayMetrics.Key].ScreenPosition = curDisplayMetrics.ScreenPosition;
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}
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ret = true;
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}
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return ret;
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}
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private string GetDisplayKey()
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{
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DesktopDisplayMetrics metrics = DesktopDisplayMetrics.AcquireMetrics();
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return metrics.Key;
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}
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private void StartCaptureTimer()
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{
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// restart capture timer
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captureTimer.Change(MinCaptureLatency, Timeout.Infinite);
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}
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private void CancelCaptureTimer()
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{
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// restart capture timer
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captureTimer.Change(Timeout.Infinite, Timeout.Infinite);
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}
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private void StartRestoreTimer()
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{
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restoreTimer.Change(RestoreLatency, Timeout.Infinite);
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}
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private void BeginCaptureApplicationsOnCurrentDisplays(bool initialCapture = false)
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{
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var thread = new Thread(() =>
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{
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try
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{
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string displayKey = GetDisplayKey();
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if (displayKey != validDisplayKeyForCapture)
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{
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// discard the capture request due to display setting change
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Log.Trace("Discard capture for {0}, when expecting {1}", displayKey, validDisplayKeyForCapture);
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return;
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}
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if (!initialCapture)
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{
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if (userMoves == 0 && pendingCaptureWindows.Count == 0)
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{
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osMove = false;
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// avoid trigger capture timer repeatedly
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return;
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}
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if (osMove)
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{
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// postpone capture to wait for restore
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StartCaptureTimer();
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return;
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}
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}
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lock (databaseLock)
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{
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CaptureApplicationsOnCurrentDisplays();
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// reset capture statistics for next capture period
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pendingCaptureWindows.Clear();
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userMoves = 0;
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osMove = false;
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}
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}
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catch (Exception ex)
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{
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Log.Error(ex.ToString());
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}
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});
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thread.IsBackground = false;
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thread.Name = "PersistentWindowProcessor.BeginCaptureApplicationsOnCurrentDisplays()";
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thread.Start();
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}
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private void CaptureApplicationsOnCurrentDisplays(string displayKey = null)
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{
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var appWindows = CaptureWindowsOfInterest();
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int cnt = 0;
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if (displayKey == null)
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{
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displayKey = GetDisplayKey();
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}
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foreach (var window in appWindows)
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{
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DateTime now = DateTime.Now;
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if (CaptureWindow(window, 0, now, displayKey))
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{
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cnt++;
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}
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}
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if (cnt > 0)
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{
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Log.Trace("{0} windows captured", cnt);
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}
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}
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private IEnumerable<SystemWindow> CaptureWindowsOfInterest()
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{
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return SystemWindow.AllToplevelWindows
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.Where(row => row.Parent.HWnd.ToInt64() == 0
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&& !string.IsNullOrEmpty(row.Title)
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//&& !row.Title.Equals("Program Manager")
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//&& !row.Title.Contains("Task Manager")
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&& row.Visible
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);
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}
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private bool IsWindowMoved(string displayKey, SystemWindow window, User32Events eventType, DateTime now, out ApplicationDisplayMetrics curDisplayMetrics)
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{
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if (!window.IsValid() || string.IsNullOrEmpty(window.ClassName))
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{
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curDisplayMetrics = null;
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return false;
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}
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IntPtr hwnd = window.HWnd;
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WindowPlacement windowPlacement = new WindowPlacement();
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User32.GetWindowPlacement(window.HWnd, ref windowPlacement);
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// compensate for GetWindowPlacement() failure to get real coordinate of snapped window
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RECT screenPosition = new RECT();
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User32.GetWindowRect(hwnd, ref screenPosition);
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if (screenPosition.Top < 0 && screenPosition.Top > -15)
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{
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// automatically fix small negative y coordinate to avoid repeated recovery failure
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screenPosition.Top = 0;
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}
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uint processId = 0;
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uint threadId = User32.GetWindowThreadProcessId(window.HWnd, out processId);
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curDisplayMetrics = new ApplicationDisplayMetrics
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{
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HWnd = hwnd,
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#if DEBUG
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// these function calls are very cpu-intensive
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ApplicationName = window.Process.ProcessName,
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#else
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ApplicationName = "",
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#endif
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ProcessId = processId,
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WindowPlacement = windowPlacement,
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ScreenPosition = screenPosition
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};
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bool needUpdate = false;
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if (!monitorApplications[displayKey].ContainsKey(curDisplayMetrics.Key))
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{
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needUpdate = true;
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}
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else
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{
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ApplicationDisplayMetrics prevDisplayMetrics = monitorApplications[displayKey][curDisplayMetrics.Key];
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if (prevDisplayMetrics.ProcessId != curDisplayMetrics.ProcessId)
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{
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// key collision between dead window and new window with the same hwnd
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monitorApplications[displayKey].Remove(curDisplayMetrics.Key);
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needUpdate = true;
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}
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else if (!prevDisplayMetrics.ScreenPosition.Equals(curDisplayMetrics.ScreenPosition))
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{
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needUpdate = true;
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}
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else if (!prevDisplayMetrics.EqualPlacement(curDisplayMetrics))
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{
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Log.Trace("Unexpected WindowPlacement.NormalPosition change if ScreenPosition keep same {0} {1} {2}",
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window.Process.ProcessName, processId, window.HWnd.ToString("X8"));
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string log = string.Format("prev WindowPlacement ({0}, {1}) of size {2} x {3}",
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prevDisplayMetrics.WindowPlacement.NormalPosition.Left,
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prevDisplayMetrics.WindowPlacement.NormalPosition.Top,
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prevDisplayMetrics.WindowPlacement.NormalPosition.Width,
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prevDisplayMetrics.WindowPlacement.NormalPosition.Height
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);
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string log2 = string.Format("cur WindowPlacement ({0}, {1}) of size {2} x {3}",
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curDisplayMetrics.WindowPlacement.NormalPosition.Left,
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curDisplayMetrics.WindowPlacement.NormalPosition.Top,
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curDisplayMetrics.WindowPlacement.NormalPosition.Width,
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curDisplayMetrics.WindowPlacement.NormalPosition.Height
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);
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Log.Trace("{0}", log);
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Log.Trace("{0}", log2);
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/*
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if (monitorApplications[displayKey][curDisplayMetrics.Key].RecoverWindowPlacement)
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{
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Log.Trace("Try recover previous placement");
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WindowPlacement prevWP = prevDisplayMetrics.WindowPlacement;
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User32.SetWindowPlacement(hwnd, ref prevWP);
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RECT rect = prevDisplayMetrics.ScreenPosition;
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User32.MoveWindow(hwnd, rect.Left, rect.Top, rect.Width, rect.Height, true);
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monitorApplications[displayKey][curDisplayMetrics.Key].RecoverWindowPlacement = false;
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}
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else
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{
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Log.Trace("Fail to recover NormalPosition {0} {1} {2}",
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window.Process.ProcessName, processId, window.HWnd.ToString("X8"));
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// needUpdate = true;
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// immediately update WindowPlacement with current value
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monitorApplications[displayKey][curDisplayMetrics.Key].WindowPlacement = curDisplayMetrics.WindowPlacement;
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monitorApplications[displayKey][curDisplayMetrics.Key].RecoverWindowPlacement = true;
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}
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*/
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//monitorApplications[displayKey][curDisplayMetrics.Key].WindowPlacement = curDisplayMetrics.WindowPlacement;
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needUpdate = true;
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}
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else
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{
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// nothing changed except event type & time
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}
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}
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return needUpdate;
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}
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|
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private void BeginRestoreApplicationsOnCurrentDisplays()
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{
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var thread = new Thread(() =>
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{
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try
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{
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lock (databaseLock)
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{
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validDisplayKeyForCapture = GetDisplayKey();
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restoringWindowPos = true; // this might trigger repeated restore if not handled carefully
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RestoreApplicationsOnCurrentDisplays(validDisplayKeyForCapture);
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restoringWindowPos = false;
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osMove = false; // avoid capture timer loop
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}
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}
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catch (Exception ex)
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{
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Log.Error(ex.ToString());
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}
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});
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thread.IsBackground = false;
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thread.Name = "PersistentWindowProcessor.RestoreApplicationsOnCurrentDisplays()";
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thread.Start();
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}
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|
|
|
private bool RestoreApplicationsOnCurrentDisplays(string displayKey, SystemWindow sWindow = null)
|
|
{
|
|
bool succeed = true;
|
|
|
|
if (!monitorApplications.ContainsKey(displayKey)
|
|
|| monitorApplications[displayKey].Count == 0)
|
|
{
|
|
// the display setting has not been captured yet
|
|
Log.Trace("Unknown display setting {0}", displayKey);
|
|
return succeed;
|
|
}
|
|
|
|
Log.Info("Restoring applications for {0}", displayKey);
|
|
IEnumerable<SystemWindow> sWindows;
|
|
SystemWindow[] arr = new SystemWindow[1];
|
|
if (sWindow != null)
|
|
{
|
|
arr[0] = sWindow;
|
|
sWindows = arr;
|
|
}
|
|
else
|
|
{
|
|
sWindows = CaptureWindowsOfInterest();
|
|
}
|
|
foreach (var window in sWindows)
|
|
{
|
|
if (!window.IsValid() || string.IsNullOrEmpty(window.ClassName))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
var proc_name = window.Process.ProcessName;
|
|
if (proc_name.Contains("CodeSetup"))
|
|
{
|
|
// prevent hang in SetWindowPlacement()
|
|
continue;
|
|
}
|
|
|
|
string applicationKey = ApplicationDisplayMetrics.GetKey(window.HWnd, window.Process.ProcessName);
|
|
|
|
if (monitorApplications[displayKey].ContainsKey(applicationKey))
|
|
{
|
|
ApplicationDisplayMetrics prevDisplayMetrics = monitorApplications[displayKey][applicationKey];
|
|
// looks like the window is still here for us to restore
|
|
WindowPlacement windowPlacement = prevDisplayMetrics.WindowPlacement;
|
|
IntPtr hwnd = prevDisplayMetrics.HWnd;
|
|
|
|
ApplicationDisplayMetrics curDisplayMetrics = null;
|
|
if (!IsWindowMoved(displayKey, window, 0, DateTime.Now, out curDisplayMetrics))
|
|
{
|
|
// window position has no change
|
|
continue;
|
|
}
|
|
|
|
// block capture for current hwnd
|
|
this.curRestoreHwnd = hwnd;
|
|
|
|
bool success;
|
|
// recover NormalPosition (the workspace position prior to snap)
|
|
if (windowPlacement.ShowCmd == ShowWindowCommands.Maximize)
|
|
{
|
|
// When restoring maximized windows, it occasionally switches res and when the maximized setting is restored
|
|
// the window thinks it's maximized, but does not eat all the real estate. So we'll temporarily unmaximize then
|
|
// re-apply that
|
|
windowPlacement.ShowCmd = ShowWindowCommands.Normal;
|
|
User32.SetWindowPlacement(hwnd, ref windowPlacement);
|
|
windowPlacement.ShowCmd = ShowWindowCommands.Maximize;
|
|
}
|
|
success = User32.SetWindowPlacement(hwnd, ref windowPlacement);
|
|
Log.Info("SetWindowPlacement({0} [{1}x{2}]-[{3}x{4}]) - {5}",
|
|
window.Process.ProcessName,
|
|
windowPlacement.NormalPosition.Left,
|
|
windowPlacement.NormalPosition.Top,
|
|
windowPlacement.NormalPosition.Width,
|
|
windowPlacement.NormalPosition.Height,
|
|
success);
|
|
|
|
// recover previous screen position
|
|
RECT rect = prevDisplayMetrics.ScreenPosition;
|
|
//success &= User32.MoveWindow(hwnd, rect.Left, rect.Top, rect.Width, rect.Height, true);
|
|
success &= User32.SetWindowPos(
|
|
window.HWnd,
|
|
IntPtr.Zero,
|
|
rect.Left,
|
|
rect.Top,
|
|
rect.Width,
|
|
rect.Height,
|
|
SetWindowPosFlags.DoNotActivate |
|
|
SetWindowPosFlags.DoNotChangeOwnerZOrder |
|
|
SetWindowPosFlags.AsynchronousWindowPosition);
|
|
|
|
success &= User32.SetWindowPos(
|
|
window.HWnd,
|
|
IntPtr.Zero,
|
|
rect.Left,
|
|
rect.Top,
|
|
rect.Width,
|
|
rect.Height,
|
|
SetWindowPosFlags.DoNotActivate |
|
|
SetWindowPosFlags.DoNotChangeOwnerZOrder);
|
|
|
|
Log.Info("MoveWindow({0} [{1}x{2}]-[{3}x{4}]) - {5}",
|
|
window.Process.ProcessName,
|
|
rect.Left,
|
|
rect.Top,
|
|
rect.Width,
|
|
rect.Height,
|
|
success);
|
|
|
|
// unblock capture
|
|
this.curRestoreHwnd = IntPtr.Zero;
|
|
|
|
if (!success)
|
|
{
|
|
succeed = false;
|
|
string error = new Win32Exception(Marshal.GetLastWin32Error()).Message;
|
|
Log.Error(error);
|
|
}
|
|
}
|
|
}
|
|
|
|
Log.Trace("Restored windows position for display setting {0}", displayKey);
|
|
|
|
return succeed;
|
|
}
|
|
|
|
public void Stop()
|
|
{
|
|
//stop running thread of event loop
|
|
}
|
|
|
|
#region IDisposable
|
|
public virtual void Dispose(bool disposing)
|
|
{
|
|
SystemEvents.DisplaySettingsChanging -= this.displaySettingsChangingHandler;
|
|
SystemEvents.DisplaySettingsChanged -= this.displaySettingsChangedHandler;
|
|
SystemEvents.PowerModeChanged -= powerModeChangedHandler;
|
|
SystemEvents.SessionSwitch -= sessionSwitchEventHandler;
|
|
|
|
foreach (var handle in this.winEventHooks)
|
|
{
|
|
User32.UnhookWinEvent(handle);
|
|
}
|
|
}
|
|
|
|
public void Dispose()
|
|
{
|
|
Dispose(true);
|
|
GC.SuppressFinalize(this);
|
|
}
|
|
|
|
~PersistentWindowProcessor()
|
|
{
|
|
Dispose(false);
|
|
}
|
|
#endregion
|
|
}
|
|
|
|
}
|