From 4db610f292aca3ae4ed0bb59ed1972202a1c6b27 Mon Sep 17 00:00:00 2001
From: Vic Lee <llyzs@163.com>
Date: Wed, 11 Apr 2012 12:37:47 +0800
Subject: [PATCH 1/2] x11: release all pressed keys when window is unmapped.

https://github.com/FreeRDP/FreeRDP/pull/547

Backported by Ondrej Holy <oholy@redhat.com>.
---
 client/X11/xf_event.c    |  2 ++
 client/X11/xf_keyboard.c | 22 ++++++++++++++++++++++
 client/X11/xf_keyboard.h |  1 +
 3 files changed, 25 insertions(+)

diff --git a/client/X11/xf_event.c b/client/X11/xf_event.c
index b5c381f..cbcfc65 100644
--- a/client/X11/xf_event.c
+++ b/client/X11/xf_event.c
@@ -507,6 +507,8 @@ boolean xf_event_UnmapNotify(xfInfo* xfi, XEvent* event, boolean app)
 	rdpWindow* window;
 	rdpRail* rail = ((rdpContext*) xfi->context)->rail;
 
+	xf_kbd_release_all_keypress(xfi);
+
 	if (app != true)
 		return true;
 
diff --git a/client/X11/xf_keyboard.c b/client/X11/xf_keyboard.c
index cb82fa4..e94b362 100644
--- a/client/X11/xf_keyboard.c
+++ b/client/X11/xf_keyboard.c
@@ -50,6 +50,28 @@ void xf_kbd_unset_keypress(xfInfo* xfi, uint8 keycode)
 		return;
 }
 
+void xf_kbd_release_all_keypress(xfInfo* xfi)
+{
+	int keycode;
+	uint16 flags;
+	uint8 rdp_scancode;
+	boolean extended;
+
+	for (keycode = 0; keycode < sizeof(xfi->pressed_keys) / sizeof(xfi->pressed_keys[0]); keycode++)
+	{
+		if (xfi->pressed_keys[keycode] != NoSymbol)
+		{
+			rdp_scancode = freerdp_kbd_get_scancode_by_keycode(keycode, &extended);
+
+			flags = KBD_FLAGS_RELEASE;
+			flags |= (extended) ? KBD_FLAGS_EXTENDED : 0;
+			xfi->instance->input->KeyboardEvent(xfi->instance->input, flags, rdp_scancode);
+
+			xfi->pressed_keys[keycode] = NoSymbol;
+		}
+	}
+}
+
 boolean xf_kbd_key_pressed(xfInfo* xfi, KeySym keysym)
 {
 	KeyCode keycode = XKeysymToKeycode(xfi->display, keysym);
diff --git a/client/X11/xf_keyboard.h b/client/X11/xf_keyboard.h
index 92e08fc..e316f07 100644
--- a/client/X11/xf_keyboard.h
+++ b/client/X11/xf_keyboard.h
@@ -28,6 +28,7 @@
 void xf_kbd_init(xfInfo* xfi);
 void xf_kbd_set_keypress(xfInfo* xfi, uint8 keycode, KeySym keysym);
 void xf_kbd_unset_keypress(xfInfo* xfi, uint8 keycode);
+void xf_kbd_release_all_keypress(xfInfo* xfi);
 boolean xf_kbd_key_pressed(xfInfo* xfi, KeySym keysym);
 void xf_kbd_send_key(xfInfo* xfi, boolean down, uint8 keycode);
 int xf_kbd_read_keyboard_state(xfInfo* xfi);
-- 
2.9.3