[GNUnet-SVN] r26277 - gnunet-gtk/src/fs

[gnunet]

Author: LRN
Date: 2013-03-04 02:18:54 +0100 (Mon, 04 Mar 2013)
New Revision: 26277

Modified:
   gnunet-gtk/src/fs/gnunet-fs-gtk_event-handler.c
Log:
Add popup menu items to look for associated namespace

Modified: gnunet-gtk/src/fs/gnunet-fs-gtk_event-handler.c
===================================================================
--- gnunet-gtk/src/fs/gnunet-fs-gtk_event-handler.c     2013-03-04 01:18:50 UTC 
(rev 26276)
+++ gnunet-gtk/src/fs/gnunet-fs-gtk_event-handler.c     2013-03-04 01:18:54 UTC 
(rev 26277)
@@ -771,7 +771,7 @@
  *
  * @param spc the 'struct SearchListPopupContext' of the menu
  * @param is_recursive was this the 'recursive' option?
- * @parma save_as was this the 'save as' option?
+ * @param save_as was this the 'save as' option?
  */
 static void
 start_download_ctx_menu_helper (struct SearchListPopupContext *spc,
@@ -843,7 +843,30 @@
   start_download_ctx_menu_helper (spc, GNUNET_NO, GNUNET_NO);
 }
 
+/**
+ * "Get root element of associated namespace X" was selected in the current 
search
+ * context menu.
+ *
+ * @param item the menu item that was selected
+ * @param user_data the 'struct SearchListPopupContext' of the menu
+ */
+static void
+start_download_associated_ns_ctx_menu (GtkMenuItem *item, gpointer user_data)
+{
+  struct GNUNET_FS_Uri *uri;
+  uri = g_object_get_data (G_OBJECT (item), "sks-uri");
 
+  if (NULL == uri)
+    return;
+
+  /* start search */
+  GNUNET_FS_search_start (GNUNET_FS_GTK_get_fs_handle (),
+                         uri, (uintptr_t) user_data,
+                          GNUNET_FS_SEARCH_OPTION_NONE, NULL);
+  /* GObject will clean up the URI */
+}
+
+
 /**
  * "Download recursively" was selected in the current search context menu.
  * 
@@ -937,7 +960,105 @@
   GNUNET_free (uris);
 }
 
+/* Called for each embedded sks. Return GNUNET_OK to continue iteration */
+typedef int (*embedded_sks_callback) (void *cls, const struct GNUNET_FS_Uri 
*sks_uri,
+    const char *sks_uri_string, struct GNUNET_HashCode *nsid);
 
+struct sks_scanner_callback_context
+{
+  embedded_sks_callback cb;
+  void *cls;
+};
+
+/* Metadata callback. Checks metadata item for being an SKS URI,
+ * invokes the callback if so.
+ */
+static int
+check_for_embedded_sks (void *cls, const char *plugin_name, enum 
EXTRACTOR_MetaType type,
+              enum EXTRACTOR_MetaFormat format, const char *data_mime_type,
+              const char *data, size_t data_size)
+{
+  struct sks_scanner_callback_context *ctx = cls;
+  int result;
+
+  if ((EXTRACTOR_METATYPE_URI == type) &&
+      (EXTRACTOR_METAFORMAT_UTF8 == format) &&
+      (data_mime_type && (0 == strcmp ("text/plain", data_mime_type))))
+  {
+    struct GNUNET_FS_Uri *sks_uri;
+    char *emsg;
+    emsg = NULL;
+    sks_uri = GNUNET_FS_uri_parse (data, &emsg);
+    if (NULL != sks_uri)
+    {
+      if (GNUNET_FS_uri_test_sks (sks_uri))
+      {
+        char *id = GNUNET_FS_uri_sks_get_content_id (sks_uri);
+        if (NULL != id)
+        {
+          struct GNUNET_HashCode nsid;
+          if ((0 == strcmp (id, "/")) &&
+              (GNUNET_OK == GNUNET_FS_uri_sks_get_namespace (sks_uri, &nsid)))
+            result = ctx->cb (ctx->cls, sks_uri, data, &nsid);
+          GNUNET_free (id);
+        }
+      }
+      GNUNET_FS_uri_destroy (sks_uri);
+    }
+    GNUNET_free_non_null (emsg);
+  }
+  return result;
+}
+
+/* Search metadata for SKS URIs, invoke the callback for each one. */
+static void
+find_embedded_sks (const struct GNUNET_CONTAINER_MetaData *meta, 
embedded_sks_callback cb, void *cls)
+{
+  struct sks_scanner_callback_context ctx;
+  ctx.cb = cb;
+  ctx.cls = cls;
+  GNUNET_CONTAINER_meta_data_iterate (meta, check_for_embedded_sks, &ctx);
+}
+
+struct sks_population_context
+{
+  GtkMenu *menu;
+  int counter;
+  uintptr_t anonymity_level;
+};
+
+/* Called for every SKS URI in metadata. Adds up to 3 menu items
+ * that will initiate downloads for these SKS URIs
+ */
+static int
+populate_popup_with_sks_items (void *cls, const struct GNUNET_FS_Uri *sks_uri,
+    const char *sks_uri_string, struct GNUNET_HashCode *nsid)
+{
+  struct sks_population_context *ctx = cls;
+  GtkWidget *child;
+  char *label;
+  GtkWidget *ns_association_icon;
+
+  label = NULL;
+  ctx->counter += 1;
+  GNUNET_asprintf (&label, _("Get root element of associated namespace #%d"), 
ctx->counter);
+  child = gtk_image_menu_item_new_with_label (label);
+  GNUNET_free (label);
+
+  ns_association_icon = gtk_image_new_from_icon_name ("gnunet-ns-association", 
GTK_ICON_SIZE_MENU);
+
+  /* Takes ownership of the icon */
+  gtk_image_menu_item_set_image (GTK_IMAGE_MENU_ITEM (child), 
ns_association_icon);
+
+  g_object_set_data_full (G_OBJECT (child), "sks-uri", GNUNET_FS_uri_dup 
(sks_uri), (GDestroyNotify) GNUNET_FS_uri_destroy);
+  g_signal_connect (child, "activate",
+      G_CALLBACK (start_download_associated_ns_ctx_menu), (gpointer) 
ctx->anonymity_level);
+  gtk_widget_show (child);
+  gtk_menu_shell_append (GTK_MENU_SHELL (ctx->menu), child);
+
+  return (ctx->counter < 4) ? GNUNET_OK : GNUNET_SYSERR;
+}
+
 /**
  * Context menu was requested for a search result list.
  * Compute which menu items are applicable and display
@@ -964,6 +1085,7 @@
   struct SearchListPopupContext *spc;
   struct GNUNET_CONTAINER_MetaData *meta;
   int is_directory = GNUNET_NO;
+  struct sks_population_context sks_pop_ctx;
 
   spc = GNUNET_malloc (sizeof (struct SearchListPopupContext));
   spc->tab = tab;
@@ -1015,6 +1137,27 @@
     gtk_widget_show (child);
     gtk_menu_shell_append (GTK_MENU_SHELL (menu), child);
   }
+
+  /* Insert a separator */
+  child = gtk_separator_menu_item_new ();
+  gtk_widget_show (child);
+  gtk_menu_shell_append (GTK_MENU_SHELL (menu), child);
+
+  /* check for embedded SKS URIs */
+  sks_pop_ctx.counter = 0;
+  sks_pop_ctx.menu = menu;
+  /* TODO: make this configurable, or inherit it from the search? */
+  sks_pop_ctx.anonymity_level = 1;
+  find_embedded_sks (meta, populate_popup_with_sks_items,
+      &sks_pop_ctx);
+  if (0 < sks_pop_ctx.counter)
+  {
+    /* Insert another separator */
+    child = gtk_separator_menu_item_new ();
+    gtk_widget_show (child);
+    gtk_menu_shell_append (GTK_MENU_SHELL (menu), child);
+  }
+
   if ( (NULL != sr->download) &&
        (GNUNET_YES != sr->download->is_done) )
   {