From 2ca14c025aff099fb52af21785e3ba05a4c3487b Mon Sep 17 00:00:00 2001
From: Angus Leeming <leeming@lyx.org>
Date: Thu, 3 Jun 2004 13:08:50 +0000
Subject: [PATCH] Fix crash when generating instant preview of external inset.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@8803 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/ChangeLog      | 15 +++++++++++++++
 src/Makefile.am    |  1 +
 src/exporter.C     |  5 ++---
 src/outputparams.C | 26 ++++++++++++++++++++++++++
 src/outputparams.h | 14 ++++++--------
 5 files changed, 50 insertions(+), 11 deletions(-)
 create mode 100644 src/outputparams.C

diff --git a/src/ChangeLog b/src/ChangeLog
index 33e46020d8..b34a90f213 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,18 @@
+2004-06-02  Angus Leeming  <leeming@lyx.org>
+
+	Fix crash caused by dereferencing null pointer 'exportdata' in
+	OutputParams by creating a new ExportData variable on the heap,
+	storing it in a boost::shared_ptr.
+	The crash was triggered when generating an Instant Preview
+	of an external inset.
+
+	* Makefile.am: add outputparams.C
+
+	* outputparams.[Ch]: store exportdata as a shared_ptr<Exportdata>.
+	(c-tor): allocate memory to it.
+
+	* exporter.C (c-tor): associated changes.
+
 2004-06-01  Angus Leeming  <leeming@lyx.org>
 
 	* output_linuxdoc.C (linuxdocParagraphs): Check that the paragraph
diff --git a/src/Makefile.am b/src/Makefile.am
index 51b46a050b..d26782ad9c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -225,6 +225,7 @@ lyx_SOURCES = \
 	metricsinfo.h \
 	output.C \
 	output.h \
+	outputparams.C \
 	outputparams.h \
 	output_docbook.C \
 	output_docbook.h \
diff --git a/src/exporter.C b/src/exporter.C
index f91d983855..23ada4a789 100644
--- a/src/exporter.C
+++ b/src/exporter.C
@@ -136,8 +136,6 @@ bool Exporter::Export(Buffer * buffer, string const & format,
 	OutputParams runparams;
 	runparams.flavor = OutputParams::LATEX;
 	runparams.linelen = lyxrc.ascii_linelen;
-	ExportData exportdata;
-	runparams.exportdata = &exportdata;
 	vector<string> backends = Backends(*buffer);
 	if (find(backends.begin(), backends.end(), format) == backends.end()) {
 		for (vector<string>::const_iterator it = backends.begin();
@@ -200,7 +198,8 @@ bool Exporter::Export(Buffer * buffer, string const & format,
 		                              formats.extension(format));
 		// We need to copy referenced files (e. g. included graphics
 		// if format == "dvi") to the result dir.
-		vector<ExportedFile> const files = exportdata.externalFiles(format);
+		vector<ExportedFile> const files =
+			runparams.exportdata->externalFiles(format);
 		string const dest = OnlyPath(result_file);
 		CopyStatus status = SUCCESS;
 		for (vector<ExportedFile>::const_iterator it = files.begin();
diff --git a/src/outputparams.C b/src/outputparams.C
new file mode 100644
index 0000000000..1cf785b063
--- /dev/null
+++ b/src/outputparams.C
@@ -0,0 +1,26 @@
+/**
+ * \file outputparams.C
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
+ *
+ *  \author Angus Leeming
+ *
+ * Full author contact details are available in file CREDITS.
+ */
+
+#include <config.h>
+
+#include "outputparams.h"
+#include "exporter.h"
+
+
+OutputParams::OutputParams()
+	: flavor(LATEX), nice(false), moving_arg(false),
+	  free_spacing(false), use_babel(false),
+	  mixed_content(false), linelen(0),
+	  exportdata(new ExportData)
+{}
+
+
+OutputParams::~OutputParams()
+{}
diff --git a/src/outputparams.h b/src/outputparams.h
index ff0fd7a9fc..7c1bc1d6fb 100644
--- a/src/outputparams.h
+++ b/src/outputparams.h
@@ -13,6 +13,7 @@
 #define OUTPUTPARAMS_H
 
 #include "support/types.h"
+#include <boost/shared_ptr.hpp>
 
 
 class ExportData;
@@ -26,11 +27,8 @@ struct OutputParams {
 		XML
 	};
 
-	OutputParams()
-		: flavor(LATEX), nice(false), moving_arg(false),
-		  free_spacing(false), use_babel(false),
-		  mixed_content(false), linelen(0), exportdata(0)
-	{}
+	OutputParams();
+	~OutputParams();
 
 	/** The latex that we export depends occasionally on what is to
 	    compile the file.
@@ -60,7 +58,7 @@ struct OutputParams {
 	bool use_babel;
 
 	/** Used for docbook to see if inside a region of mixed content.
-	    In that case all the white spaces are significant and can not appear
+	    In that case all the white spaces are significant and cannot appear
 	    at the begin or end.
 	*/
 	bool mixed_content;
@@ -73,7 +71,7 @@ struct OutputParams {
 	    This is a hack: Make it possible to add stuff to constant
 	    OutputParams instances.
 	*/
-	ExportData *exportdata;
+	boost::shared_ptr<ExportData> exportdata;
 };
 
-#endif // LATEXRUNPARAMS_H
+#endif // NOT OUTPUTPARAMS_H