From bf954a7bc3abbd6fdf7857f0718be8a004cc0545 Mon Sep 17 00:00:00 2001
From: Jean-Marc Lasgouttes <lasgouttes@lyx.org>
Date: Wed, 27 Feb 2002 11:36:20 +0000
Subject: [PATCH] patch against infinite depth from Martin

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3593 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/ChangeLog |  5 +++++
 src/text2.C   | 26 ++++++++++++++++----------
 2 files changed, 21 insertions(+), 10 deletions(-)

diff --git a/src/ChangeLog b/src/ChangeLog
index cc9a184b92..9c1408d375 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2002-02-26  Martin Vermeer  <martin.vermeer@hut.fi>
+
+	* text2.C (incDepth): make sure depth cannot be increased beyond
+	reasonable values.
+
 2002-02-20  Angus Leeming  <a.leeming@ic.ac.uk>
 
 	* lyxfunc.C (dispatch): act on LFUN_FORKS_SHOW and LFUN_FORKS_KILL.
diff --git a/src/text2.C b/src/text2.C
index f83a41fbde..d97b44c865 100644
--- a/src/text2.C
+++ b/src/text2.C
@@ -649,19 +649,25 @@ void  LyXText::incDepth(BufferView * bview)
    
 	while (true) {
 		// NOTE: you can't change the depth of a bibliography entry
-		if (
-			textclasslist.Style(bview->buffer()->params.textclass,
-					    cursor.par()->getLayout()
-				).labeltype != LABEL_BIBLIO) {
+		if (textclasslist.Style(bview->buffer()->params.textclass,
+					cursor.par()->getLayout()).labeltype != LABEL_BIBLIO) {
 			Paragraph * prev = cursor.par()->previous();
 
-			if (prev 
-			    && (prev->getDepth() - cursor.par()->getDepth() > 0
-				|| (prev->getDepth() == cursor.par()->getDepth()
+			if (prev) { 
+				const int depth_diff
+					= prev->getDepth() - cursor.par()->getDepth();
+				// go deeper only if 
+				// (1) the previous para is already
+				//     deeper (depth_diff > 0) 
+				// (2) the previous para is a
+				//     list-environment at the same
+				//     depth as this para. 
+				if (depth_diff > 0 || (depth_diff > -1
 				    && textclasslist.Style(bview->buffer()->params.textclass,
-							   prev->getLayout()).isEnvironment()))) {
-				cursor.par()->params().depth(cursor.par()->params().depth() + 1);
-				anything_changed = true;
+							   prev->getLayout()).isEnvironment())) {
+					cursor.par()->params().depth(cursor.par()->params().depth() + 1);
+					anything_changed = true;
+				}
 			}
 		}
 		if (cursor.par() == selection.end.par())