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/*
KeePass Password Safe - The Open-Source Password Manager
Copyright (C) 2003-2025 Dominik Reichl <dominik.reichl@t-online.de>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Security;
using System.Text;
using System.Threading;
using System.Windows.Forms;
using KeePass.Native;
using KeePass.Resources;
using KeePassLib.Utility;
namespace KeePass.Util.SendInputExt
{
internal abstract class SiEngineStd : ISiEngine
{
protected IntPtr TargetWindowHandle = IntPtr.Zero;
protected string TargetWindowTitle = string.Empty;
protected bool Cancelled = false;
private readonly Stopwatch m_swLastEvent = new Stopwatch();
#if DEBUG
private readonly List<long> m_lDelaysRec = new List<long>();
#endif
public virtual void Init()
{
Debug.Assert(!m_swLastEvent.IsRunning);
UpdateExpectedFocus();
}
public virtual void Release()
{
m_swLastEvent.Stop();
}
public void UpdateExpectedFocus()
{
try
{
IntPtr hWnd;
string strTitle;
NativeMethods.GetForegroundWindowInfo(out hWnd, out strTitle, false);
this.TargetWindowHandle = hWnd;
this.TargetWindowTitle = (strTitle ?? string.Empty);
}
catch(Exception) { Debug.Assert(false); }
}
public abstract void SendKeyImpl(int iVKey, bool? obExtKey, bool? obDown);
public abstract void SetKeyModifierImpl(Keys kMod, bool bDown);
public abstract void SendCharImpl(char ch, bool? obDown);
private bool PreSendEvent()
{
// Update event time *before* actually performing the event
m_swLastEvent.Reset();
m_swLastEvent.Start();
return ValidateState();
}
public void SendKey(int iVKey, bool? obExtKey, bool? obDown)
{
if(!PreSendEvent()) return;
SendKeyImpl(iVKey, obExtKey, obDown);
Application.DoEvents();
}
public void SetKeyModifier(Keys kMod, bool bDown)
{
if(!PreSendEvent()) return;
SetKeyModifierImpl(kMod, bDown);
Application.DoEvents();
}
public void SendChar(char ch, bool? obDown)
{
if(!PreSendEvent()) return;
SendCharImpl(ch, obDown);
Application.DoEvents();
}
public virtual void Delay(uint uMs)
{
if(this.Cancelled) return;
if(!m_swLastEvent.IsRunning)
{
Thread.Sleep((int)uMs);
m_swLastEvent.Reset();
m_swLastEvent.Start();
return;
}
m_swLastEvent.Stop();
long lAlreadyDelayed = m_swLastEvent.ElapsedMilliseconds;
long lRemDelay = (long)uMs - lAlreadyDelayed;
if(lRemDelay >= 0) Thread.Sleep((int)lRemDelay);
#if DEBUG
m_lDelaysRec.Add(lAlreadyDelayed);
#endif
m_swLastEvent.Reset();
m_swLastEvent.Start();
}
private bool ValidateState()
{
if(this.Cancelled) return false;
List<string> lAbortWindows = Program.Config.Integration.AutoTypeAbortOnWindows;
bool bChkWndCh = Program.Config.Integration.AutoTypeCancelOnWindowChange;
bool bChkTitleCh = Program.Config.Integration.AutoTypeCancelOnTitleChange;
bool bChkTitleFx = (lAbortWindows.Count != 0);
if(bChkWndCh || bChkTitleCh || bChkTitleFx)
{
IntPtr h = IntPtr.Zero;
string strTitle = null;
bool bHasInfo = true;
try
{
NativeMethods.GetForegroundWindowInfo(out h, out strTitle, false);
}
catch(Exception) { Debug.Assert(false); bHasInfo = false; }
if(strTitle == null) strTitle = string.Empty;
if(bHasInfo)
{
if(bChkWndCh && (h != this.TargetWindowHandle))
{
this.Cancelled = true;
return false;
}
if(bChkTitleCh && (strTitle != this.TargetWindowTitle))
{
this.Cancelled = true;
return false;
}
if(bChkTitleFx)
{
string strT = AutoType.NormalizeWindowText(strTitle);
foreach(string strF in lAbortWindows)
{
if(AutoType.IsMatchWindow(strT, strF))
{
this.Cancelled = true;
throw new SecurityException(KPRes.AutoTypeAbortedOnWindow +
MessageService.NewParagraph + KPRes.TargetWindow +
": '" + strTitle + "'.");
}
}
}
}
}
return true;
}
}
}
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