From 1520629d7cefe09cbc9612806c8abbbd6b36048e Mon Sep 17 00:00:00 2001
From: Vincent van Ravesteijn <vfr@lyx.org>
Date: Sat, 15 Aug 2009 21:46:39 +0000
Subject: [PATCH] If we are hiding a buffer _and_ the buffer is visible in
 another view/tabgroup, then we don't need to ensure that the buffer is clean.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@31065 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/frontends/qt4/GuiView.cpp | 19 ++++++++++++++++++-
 src/frontends/qt4/GuiView.h   |  3 +++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/frontends/qt4/GuiView.cpp b/src/frontends/qt4/GuiView.cpp
index e9e167af33..564d6e52b9 100644
--- a/src/frontends/qt4/GuiView.cpp
+++ b/src/frontends/qt4/GuiView.cpp
@@ -1939,8 +1939,12 @@ bool GuiView::closeWorkArea(GuiWorkArea * wa, bool close_buffer,
 	for (size_t i = 0; i < theSession().bookmarks().size(); ++i)
 		theLyXFunc().gotoBookmark(i+1, false, false);
 
+	// if we are only hiding the buffer and there are multiple views
+	// of the buffer, then we do not need to ensure a clean buffer.
+	bool const allow_dirty = inMultiTabs(wa) && !close_buffer;
+
 	Buffer & buf = wa->bufferView().buffer();
-	if (saveBufferIfNeeded(buf, !close_buffer)) {
+	if (allow_dirty || saveBufferIfNeeded(buf, !close_buffer)) {
 		// save in sessions if requested
 		// do not save childs if their master
 		// is opened as well
@@ -2014,6 +2018,19 @@ bool GuiView::saveBufferIfNeeded(Buffer & buf, bool hiding)
 }
 
 
+bool GuiView::inMultiTabs(GuiWorkArea * wa)
+{
+	Buffer & buf = wa->bufferView().buffer();
+
+	for (int i = 0; i != d.splitter_->count(); ++i) {
+		GuiWorkArea * wa_ = d.tabWorkArea(i)->workArea(buf);
+		if (wa_ && wa_ != wa)
+			return true;
+	}
+	return inMultiViews(wa);
+}
+
+
 bool GuiView::inMultiViews(GuiWorkArea * wa)
 {
 	QList<int> const ids = guiApp->viewIds();
diff --git a/src/frontends/qt4/GuiView.h b/src/frontends/qt4/GuiView.h
index 979cbef069..4cf5d027e9 100644
--- a/src/frontends/qt4/GuiView.h
+++ b/src/frontends/qt4/GuiView.h
@@ -304,6 +304,9 @@ private:
 	bool saveBufferIfNeeded(Buffer & buf, bool hiding);
 	///
 	bool closeBufferAll(bool tolastopened = false);
+	/// is the buffer in this workarea also shown in another tab ?
+	/// This tab can either be in the same view or in another one.
+	bool inMultiTabs(GuiWorkArea * wa);
 	/// is the buffer in this workarea also shown in another view ?
 	bool inMultiViews(GuiWorkArea * wa);
 	///
-- 
2.39.2