[evince] libdocument: Add xz compression support

[Christian Persch <chpe src gnome org>]

commit 38cfc027fc96ac19452c3138614e2c8deff63633
Author: Christian Persch <chpe gnome org>
Date:   Sat Dec 4 22:09:55 2010 +0100

    libdocument: Add xz compression support

 libdocument/ev-document-factory.c |    2 ++
 libdocument/ev-file-helpers.c     |   14 ++++++++++----
 libdocument/ev-file-helpers.h     |    3 ++-
 3 files changed, 14 insertions(+), 5 deletions(-)
---
diff --git a/libdocument/ev-document-factory.c b/libdocument/ev-document-factory.c
index 2bed390..1f1eb0d 100644
--- a/libdocument/ev-document-factory.c
+++ b/libdocument/ev-document-factory.c
@@ -47,6 +47,8 @@ get_compression_from_mime_type (const gchar *mime_type)
 			return EV_COMPRESSION_GZIP;
 		else if (g_ascii_strcasecmp (type, "bz") == 0)
 			return EV_COMPRESSION_BZIP2;
+                else if (g_ascii_strcasecmp (type, "xz") == 0)
+                        return EV_COMPRESSION_LZMA;
 	}
 
 	return EV_COMPRESSION_NONE;
diff --git a/libdocument/ev-file-helpers.c b/libdocument/ev-file-helpers.c
index edd4e4f..cab0ad5 100644
--- a/libdocument/ev-file-helpers.c
+++ b/libdocument/ev-file-helpers.c
@@ -525,8 +525,14 @@ ev_file_get_mime_type (const gchar *uri,
 }
 
 /* Compressed files support */
-#define BZIPCOMMAND "bzip2"
-#define GZIPCOMMAND "gzip"
+
+static const char *compressor_cmds[] = {
+  NULL,
+  "bzip2",
+  "gzip",
+  "xz"
+};
+
 #define N_ARGS      4
 #define BUFFER_SIZE 1024
 
@@ -546,13 +552,13 @@ compression_run (const gchar       *uri,
 	if (type == EV_COMPRESSION_NONE)
 		return NULL;
 
-	cmd = g_find_program_in_path ((type == EV_COMPRESSION_BZIP2) ? BZIPCOMMAND : GZIPCOMMAND);
+	cmd = g_find_program_in_path (compressor_cmds[type]);
 	if (!cmd) {
 		/* FIXME: better error codes! */
 		/* FIXME: i18n later */
 		g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
 			     "Failed to find the \"%s\" command in the search path.",
-			     type == EV_COMPRESSION_BZIP2 ? BZIPCOMMAND : GZIPCOMMAND);
+                             compressor_cmds[type]);
 		return NULL;
 	}
 
diff --git a/libdocument/ev-file-helpers.h b/libdocument/ev-file-helpers.h
index fffae03..0abc5c2 100644
--- a/libdocument/ev-file-helpers.h
+++ b/libdocument/ev-file-helpers.h
@@ -32,7 +32,8 @@ G_BEGIN_DECLS
 typedef enum {
 	EV_COMPRESSION_NONE,
 	EV_COMPRESSION_BZIP2,
-	EV_COMPRESSION_GZIP
+	EV_COMPRESSION_GZIP,
+        EV_COMPRESSION_LZMA
 } EvCompressionType;
 
 void        _ev_file_helpers_init     (void);