FS#11399 by me: fix r26998 for text_viewer

Restore the old behaviour:

- preferences must be read-write for tv_preferences.c , read-only for
  all other modules -> use pointer to const struct
- init functions must get the plugin buffer + its size as arguments for
  easily adding new functions -> use pointer to buffer pointer and size
  to make allocation easier
- preferences meaning is private to each file and must not be known by
  tv_preferences.c -> move tv_check_header_and_footer() back in
  tv_window.c; also avoid chaining 3 times the callbacks by calling
  tv_set_preferences() only once if more than one preference needs
  changing

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27089 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 8 insertions, 8 deletions

diff --git a/apps/plugins/text_viewer/tv_reader.c b/apps/plugins/text_viewer/tv_reader.c
index 4e91af9..8403c30 100644
--- a/apps/plugins/text_viewer/tv_reader.c
+++ b/apps/plugins/text_viewer/tv_reader.c
@@ -170,18 +170,18 @@ static void tv_change_preferences(const struct tv_preferences *oldp)
     tv_seek(cur_file_pos + cur_start_file_pos - start_file_pos, SEEK_SET);
 }
 
-bool tv_init_reader(void)
+bool tv_init_reader(unsigned char **buf, size_t *size)
 {
-    size_t size;
-
-    /* get the plugin buffer */
-    reader_buffer = rb->plugin_get_buffer(&size);
-
-    if (size < 2 * TV_MIN_BLOCK_SIZE)
+    if (*size < 2 * TV_MIN_BLOCK_SIZE)
         return false;
 
-    block_size    = size / 2;
+    block_size    = *size / 2;
     buffer_size   = 2 * block_size;
+    reader_buffer = *buf;
+
+    *buf += buffer_size;
+    *size -= buffer_size;
+
     tv_add_preferences_change_listner(tv_change_preferences);
 
     return true;