[gedit] Support loading/saving gzip compressed files

[Jesse van den Kieboom <jessevdk src gnome org>]

commit 852c3c676e3a588f42a7b2b429f78e7cee28d723
Author: Jesse van den Kieboom <jessevdk gnome org>
Date:   Thu May 13 11:57:36 2010 +0200

    Support loading/saving gzip compressed files

 gedit/gedit-document-loader.c |   28 ++++++++++++++++++++++------
 gedit/gedit-document-saver.c  |   39 +++++++++++++++++++++++++++++++++------
 2 files changed, 55 insertions(+), 12 deletions(-)
---
diff --git a/gedit/gedit-document-loader.c b/gedit/gedit-document-loader.c
index d6118af..4f54235 100644
--- a/gedit/gedit-document-loader.c
+++ b/gedit/gedit-document-loader.c
@@ -619,9 +619,9 @@ static void
 finish_query_info (AsyncData *async)
 {
 	GeditDocumentLoader *loader;
-	GInputStream *conv_stream;
 	GFileInfo *info;
 	GSList *candidate_encodings;
+	GInputStream *base_stream;
 	
 	loader = async->loader;
 	info = loader->priv->info;
@@ -652,12 +652,28 @@ finish_query_info (AsyncData *async)
 
 	loader->priv->converter = gedit_smart_charset_converter_new (candidate_encodings);
 	g_slist_free (candidate_encodings);
-	
-	conv_stream = g_converter_input_stream_new (loader->priv->stream,
-						    G_CONVERTER (loader->priv->converter));
-	g_object_unref (loader->priv->stream);
 
-	loader->priv->stream = conv_stream;
+	if (g_file_info_has_attribute (info, G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE) &&
+	    g_strcmp0 (g_file_info_get_content_type (info), "application/x-gzip") == 0)
+	{
+		GZlibDecompressor *decompressor;
+
+		decompressor = g_zlib_decompressor_new (G_ZLIB_COMPRESSOR_FORMAT_GZIP);
+
+		base_stream = g_converter_input_stream_new (loader->priv->stream,
+		                                            G_CONVERTER (decompressor));
+
+		g_object_unref (decompressor);
+	}
+	else
+	{
+		base_stream = g_object_ref (loader->priv->stream);
+	}
+
+	g_object_unref (loader->priv->stream);
+	loader->priv->stream = g_converter_input_stream_new (base_stream,
+	                                                     G_CONVERTER (loader->priv->converter));
+	g_object_unref (base_stream);
 
 	/* Output stream */
 	loader->priv->output = gedit_document_output_stream_new (loader->priv->document);
diff --git a/gedit/gedit-document-saver.c b/gedit/gedit-document-saver.c
index 8dc29d3..9d7da09 100644
--- a/gedit/gedit-document-saver.c
+++ b/gedit/gedit-document-saver.c
@@ -694,6 +694,8 @@ async_replace_ready_callback (GFile        *source,
 	GeditDocumentSaver *saver;
 	GCharsetConverter *converter;
 	GFileOutputStream *file_stream;
+	GOutputStream *base_stream;
+	gchar *content_type;
 	GError *error = NULL;
 
 	gedit_debug (DEBUG_SAVER);
@@ -707,7 +709,7 @@ async_replace_ready_callback (GFile        *source,
 	
 	saver = async->saver;
 	file_stream = g_file_replace_finish (source, res, &error);
-	
+
 	/* handle any error that might occur */
 	if (!file_stream)
 	{
@@ -716,6 +718,30 @@ async_replace_ready_callback (GFile        *source,
 		return;
 	}
 
+	content_type = gedit_document_get_content_type (saver->priv->document);
+
+	if (g_strcmp0 (content_type, "application/x-gzip") == 0)
+	{
+		GZlibCompressor *compressor;
+
+		gedit_debug_message (DEBUG_SAVER, "Use gzip compressor");
+
+		compressor = g_zlib_compressor_new (G_ZLIB_COMPRESSOR_FORMAT_GZIP,
+		                                    -1);
+
+		base_stream = g_converter_output_stream_new (G_OUTPUT_STREAM (file_stream),
+		                                             G_CONVERTER (compressor));
+
+		g_object_unref (compressor);
+		g_object_unref (file_stream);
+	}
+	else
+	{
+		base_stream = G_OUTPUT_STREAM (file_stream);
+	}
+
+	g_free (content_type);
+
 	/* FIXME: manage converter error? */
 	gedit_debug_message (DEBUG_SAVER, "Encoding charset: %s",
 			     gedit_encoding_get_charset (saver->priv->encoding));
@@ -725,17 +751,18 @@ async_replace_ready_callback (GFile        *source,
 		converter = g_charset_converter_new (gedit_encoding_get_charset (saver->priv->encoding),
 						     "UTF-8",
 						     NULL);
-		saver->priv->stream = g_converter_output_stream_new (G_OUTPUT_STREAM (file_stream),
-								       G_CONVERTER (converter));
 
-		g_object_unref (file_stream);
+		saver->priv->stream = g_converter_output_stream_new (base_stream,
+		                                                     G_CONVERTER (converter));
+
 		g_object_unref (converter);
+		g_object_unref (base_stream);
 	}
 	else
 	{
-		saver->priv->stream = G_OUTPUT_STREAM (file_stream);
+		saver->priv->stream = G_OUTPUT_STREAM (base_stream);
 	}
-	
+
 	saver->priv->input = gedit_document_input_stream_new (GTK_TEXT_BUFFER (saver->priv->document),
 								saver->priv->newline_type);