Minor issue in NEWS

[evince.git] / libdocument / ev-file-helpers.c

diff --git a/libdocument/ev-file-helpers.c b/libdocument/ev-file-helpers.c
index b6a50b6f8c470a5f1dbce4710007af53c496e95f..d9b6448418b1739e33196265d76a37f433e5cb89 100644 (file)
--- a/libdocument/ev-file-helpers.c
+++ b/libdocument/ev-file-helpers.c
@@ -33,6 +33,7 @@
 #include <libgnomevfs/gnome-vfs-utils.h>
 #include <libgnomevfs/gnome-vfs-ops.h>
 #include <libgnomevfs/gnome-vfs-xfer.h>
 #include <libgnomevfs/gnome-vfs-utils.h>
 #include <libgnomevfs/gnome-vfs-ops.h>
 #include <libgnomevfs/gnome-vfs-xfer.h>

+#include <libgnome/gnome-init.h>

 
 #include "ev-file-helpers.h"
 
 
 #include "ev-file-helpers.h"
 


@@ -167,3 +168,116 @@ ev_xfer_uri_simple (const char *from,
        return (result == GNOME_VFS_OK);
 
 }
        return (result == GNOME_VFS_OK);
 
 }

+
+/* Compressed files support */
+#define BZIPCOMMAND "bzip2"
+#define GZIPCOMMAND "gzip"
+#define N_ARGS      4
+#define BUFFER_SIZE 1024
+
+static gchar *
+compression_run (const gchar       *uri,
+                EvCompressionType  type,
+                gboolean           compress, 
+                GError           **error)
+{
+       gchar *argv[N_ARGS];
+       gchar *uri_dst = NULL;
+       gchar *filename, *filename_dst;
+       gchar *cmd;
+       gint   fd, pout;
+
+       if (type == EV_COMPRESSION_NONE)
+               return NULL;
+
+       cmd = g_find_program_in_path ((type == EV_COMPRESSION_BZIP2) ? BZIPCOMMAND : GZIPCOMMAND);
+       if (!cmd)
+               return NULL;
+
+       filename = g_filename_from_uri (uri, NULL, NULL);
+       if (!filename) {
+               g_free (cmd);
+               return NULL;
+       }
+       
+       filename_dst = g_build_filename (ev_tmp_dir (), "evinceXXXXXX", NULL);
+       fd = g_mkstemp (filename_dst);
+       if (fd < 0) {
+               g_free (cmd);
+               g_free (filename);
+               g_free (filename_dst);
+               return NULL;
+       }
+
+       argv[0] = cmd;
+       argv[1] = compress ? "-c" : "-cd";
+       argv[2] = filename;
+       argv[3] = NULL;
+
+       if (g_spawn_async_with_pipes (NULL, argv, NULL,
+                                     G_SPAWN_STDERR_TO_DEV_NULL,
+                                     NULL, NULL, NULL,
+                                     NULL, &pout, NULL, error)) {
+               GIOChannel *in, *out;
+               gchar buf[BUFFER_SIZE];
+               GIOStatus read_st, write_st;
+               gsize bytes_read, bytes_written;
+
+               in = g_io_channel_unix_new (pout);
+               g_io_channel_set_encoding (in, NULL, NULL);
+               out = g_io_channel_unix_new (fd);
+               g_io_channel_set_encoding (out, NULL, NULL);
+
+               do {
+                       read_st = g_io_channel_read_chars (in, buf,
+                                                          BUFFER_SIZE,
+                                                          &bytes_read,
+                                                          error);
+                       if (read_st == G_IO_STATUS_NORMAL) {
+                               write_st = g_io_channel_write_chars (out, buf,
+                                                                    bytes_read,
+                                                                    &bytes_written,
+                                                                    error);
+                               if (write_st == G_IO_STATUS_ERROR)
+                                       break;
+                       } else if (read_st == G_IO_STATUS_ERROR) {
+                               break;
+                       }
+               } while (bytes_read > 0);
+
+               g_io_channel_unref (in);
+               g_io_channel_unref (out);
+       }
+
+       close (fd);
+
+       if (*error == NULL) {
+               uri_dst = g_filename_to_uri (filename_dst, NULL, NULL);
+       }
+
+       g_free (cmd);
+       g_free (filename);
+       g_free (filename_dst);
+
+       return uri_dst;
+}
+
+gchar *
+ev_file_uncompress (const gchar       *uri,
+                   EvCompressionType  type,
+                   GError           **error)
+{
+       g_return_val_if_fail (uri != NULL, NULL);
+
+       return compression_run (uri, type, FALSE, error);
+}
+
+gchar *
+ev_file_compress (const gchar       *uri,
+                 EvCompressionType  type,
+                 GError           **error)
+{
+       g_return_val_if_fail (uri != NULL, NULL);
+
+       return compression_run (uri, type, TRUE, error);
+}