From 18c2c901442ff36ca48cf45e103c3ea52b99cc39 Mon Sep 17 00:00:00 2001
From: "Jerry (Xinyu Hou)" <xinyu@synergy-project.org>
Date: Mon, 11 Jul 2016 03:59:34 -0700
Subject: [PATCH] #3044 Stopped attach hook thread to foreground

---
 src/lib/synwinhk/synwinhk.cpp | 53 -----------------------------------
 1 file changed, 53 deletions(-)

diff --git a/src/lib/synwinhk/synwinhk.cpp b/src/lib/synwinhk/synwinhk.cpp
index 5aed9f3f..7412755e 100644
--- a/src/lib/synwinhk/synwinhk.cpp
+++ b/src/lib/synwinhk/synwinhk.cpp
@@ -120,7 +120,6 @@ static LPARAM			g_deadLParam      = 0;
 static BYTE				g_deadKeyState[256] = { 0 };
 static BYTE				g_keyState[256]   = { 0 };
 static DWORD			g_hookThread      = 0;
-static DWORD			g_attachedThread  = 0;
 static bool				g_fakeInput       = false;
 
 #if defined(_MSC_VER)
@@ -136,53 +135,6 @@ int _fltused=0;
 }
 #endif
 
-
-//
-// internal functions
-//
-
-static
-void
-detachThread()
-{
-	if (g_attachedThread != 0 && g_hookThread != g_attachedThread) {
-		AttachThreadInput(g_hookThread, g_attachedThread, FALSE);
-		g_attachedThread = 0;
-	}
-}
-
-static
-bool
-attachThreadToForeground()
-{
-	// only attach threads if using low level hooks.  a low level hook
-	// runs in the thread that installed the hook but we have to make
-	// changes that require being attached to the target thread (which
-	// should be the foreground window).  a regular hook runs in the
-	// thread that just removed the event from its queue so we're
-	// already in the right thread.
-	if (g_hookThread != 0) {
-		HWND window    = GetForegroundWindow();
-        if (window == NULL)
-            return false;
-
-		DWORD threadID = GetWindowThreadProcessId(window, NULL);
-		// skip if no change
-		if (g_attachedThread != threadID) {
-			// detach from previous thread
-			detachThread();
-
-			// attach to new thread
-			if (threadID != 0 && threadID != g_hookThread) {
-				AttachThreadInput(g_hookThread, threadID, TRUE);
-				g_attachedThread = threadID;
-			}
-			return true;
-		}
-	}
-	return false;
-}
-
 #if !NO_GRAB_KEYBOARD
 static
 WPARAM
@@ -497,7 +449,6 @@ static
 bool
 keyboardHookHandler(WPARAM wParam, LPARAM lParam)
 {
-	attachThreadToForeground();
 	return doKeyboardHookHandler(wParam, lParam);
 }
 #endif
@@ -608,7 +559,6 @@ static
 bool
 mouseHookHandler(WPARAM wParam, SInt32 x, SInt32 y, SInt32 data)
 {
-//	attachThreadToForeground();
 	return doMouseHookHandler(wParam, x, y, data);
 }
 
@@ -1080,9 +1030,6 @@ uninstall(void)
 	g_deadVirtKey = 0;
 	g_deadLParam  = 0;
 
-	// detach from thread
-	detachThread();
-
 	// uninstall hooks
 	if (g_keyboardLL != NULL) {
 		UnhookWindowsHookEx(g_keyboardLL);