fix some rand cases

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@6349 a592a061-630c-0410-9148-cb99ea01b6c8

src/ChangeLog

@@ -1,3 +1,8 @@
+2003-03-05  Lars Gullik Bjønnes  <larsbj@gullik.net>
+
+	* ParagraphList.C (insert): handle insert right before end()
+	(erase): fix cases where it can be first or last paragraph.
+
 2003-03-04  Lars Gullik Bjønnes  <larsbj@gullik.net>
 
 	* paragraph_funcs.C (TeXEnvironment): remove all usage of

src/ParagraphList.C

@@ -88,11 +88,20 @@ ParagraphList::ParagraphList()
 ParagraphList::iterator
 ParagraphList::insert(ParagraphList::iterator it, Paragraph * par)
 {
-	Paragraph * prev = it->previous();
-	par->next(&*it);
-	par->previous(prev);
-	prev->next(par);
-	it->previous(par);
+	if (it != end()) {
+		Paragraph * prev = it->previous();
+		par->next(&*it);
+		par->previous(prev);
+		prev->next(par);
+		it->previous(par);
+	} else {
+		// Find last par.
+		Paragraph * last = parlist;
+		while (last->next())
+			last = last->next();
+		last->next(par);
+		par->previous(last);
+	}
 	return iterator(par);
 }
 
@@ -112,8 +121,10 @@ void ParagraphList::erase(ParagraphList::iterator it)
 	Paragraph * prev = it->previous();
 	Paragraph * next = it->next();
 
-	prev->next(next);
-	next->previous(prev);
+	if (prev)
+		prev->next(next);
+	if (next)
+		next->previous(prev);
 
 	delete &*it;
 }

src/text.C

@@ -1406,6 +1406,10 @@ void LyXText::breakParagraph(BufferView * bview, char keep_layout)
 
 	setHeightOfRow(bview, cursor.row());
 
+#warning Trouble Point! (Lgb)
+	// When ::breakParagraph is called from within an inset we must
+	// ensure that the correct ParagraphList is used. Today that is not
+	// the case and the Buffer::paragraphs is used. Not good. (Lgb)
 	while (!cursor.par()->next()->empty()
 	  && cursor.par()->next()->isNewline(0))
 	   cursor.par()->next()->erase(0);