From a91c42b7dbc9fb8737fbbd4788906a795bb69006 Mon Sep 17 00:00:00 2001
From: Enrico Forestieri <forenr@lyx.org>
Date: Tue, 18 Aug 2009 11:49:00 +0000
Subject: [PATCH] Fix the dataloss problem when shutting down Windows (part of
 bug #5525).

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/branches/BRANCH_1_6_X@31114 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/client/client.cpp     |  4 ++++
 src/support/os_cygwin.cpp | 19 ++++++++++++++++++-
 src/support/os_win32.cpp  | 17 +++++++++++++++++
 src/tex2lyx/tex2lyx.cpp   |  5 +++++
 status.16x                |  2 ++
 5 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/src/client/client.cpp b/src/client/client.cpp
index e62ef5f390..365498f2cc 100644
--- a/src/client/client.cpp
+++ b/src/client/client.cpp
@@ -65,6 +65,10 @@ using ::boost::scoped_ptr;
 
 namespace lyx {
 
+// Keep the linker happy on Windows
+void emergencyCleanup()
+{}
+
 namespace support {
 
 string itoa(unsigned int i)
diff --git a/src/support/os_cygwin.cpp b/src/support/os_cygwin.cpp
index d90ebcf7c2..99cf75171e 100644
--- a/src/support/os_cygwin.cpp
+++ b/src/support/os_cygwin.cpp
@@ -33,6 +33,9 @@
 using namespace std;
 
 namespace lyx {
+
+void emergencyCleanup();
+
 namespace support {
 namespace os {
 
@@ -122,15 +125,29 @@ string convert_path_list(string const & p, PathStyle const & target)
 	return subst(p, '\\', '/');
 }
 
+
+BOOL terminate_handler(DWORD event)
+{
+	if (event == CTRL_CLOSE_EVENT
+	    || event == CTRL_LOGOFF_EVENT
+	    || event == CTRL_SHUTDOWN_EVENT) {
+		lyx::emergencyCleanup();
+		return TRUE;
+	}
+	return FALSE;
+}
+
 } // namespace anon
 
 void init(int, char *[])
 {
 	// Make sure that the TEMP variable is set
 	// and sync the Windows environment.
-
 	setenv("TEMP", "/tmp", false);
 	cygwin_internal(CW_SYNC_WINENV);
+
+	// Catch shutdown events.
+	SetConsoleCtrlHandler((PHANDLER_ROUTINE)terminate_handler, TRUE);
 }
 
 
diff --git a/src/support/os_win32.cpp b/src/support/os_win32.cpp
index f9f1112df7..ceae3651c8 100644
--- a/src/support/os_win32.cpp
+++ b/src/support/os_win32.cpp
@@ -71,6 +71,9 @@
 using namespace std;
 
 namespace lyx {
+
+void emergencyCleanup();
+
 namespace support {
 namespace os {
 
@@ -80,6 +83,17 @@ bool windows_style_tex_paths_ = true;
 
 string cygdrive = "/cygdrive";
 
+BOOL terminate_handler(DWORD event)
+{
+	if (event == CTRL_CLOSE_EVENT
+	    || event == CTRL_LOGOFF_EVENT
+	    || event == CTRL_SHUTDOWN_EVENT) {
+		lyx::emergencyCleanup();
+		return TRUE;
+	}
+	return FALSE;
+}
+
 } // namespace anon
 
 void init(int /* argc */, char * argv[])
@@ -161,6 +175,9 @@ void init(int /* argc */, char * argv[])
 		if ((retVal == ERROR_SUCCESS) && (bufSize <= MAX_PATH))
 			cygdrive = rtrim(string(buf), "/");
 	}
+
+	// Catch shutdown events.
+	SetConsoleCtrlHandler((PHANDLER_ROUTINE)terminate_handler, TRUE);
 }
 
 
diff --git a/src/tex2lyx/tex2lyx.cpp b/src/tex2lyx/tex2lyx.cpp
index 1ac32c40ff..603f5d5b9d 100644
--- a/src/tex2lyx/tex2lyx.cpp
+++ b/src/tex2lyx/tex2lyx.cpp
@@ -41,6 +41,11 @@ using namespace lyx::support::os;
 
 namespace lyx {
 
+// Keep the linker happy on Windows
+void emergencyCleanup()
+{}
+
+
 string const trim(string const & a, char const * p)
 {
 	// LASSERT(p, /**/);
diff --git a/status.16x b/status.16x
index 998ac92203..d866268ee1 100644
--- a/status.16x
+++ b/status.16x
@@ -179,6 +179,8 @@ What's new
 
 - Enable document margin settings and hyperref settings in the
   article (beamer) class.
+
+- Fix data loss when shutting down Windows (part of bug 5525).
   
 
 * USER INTERFACE