Merge pull request uzbl#253 from GSI/unique-history-load

made list of urls unique when $DMENU_HAS_VERTICAL

examples/data/scripts/load_url_from_history.sh

@@ -12,8 +12,12 @@ readonly DMENU_OPTIONS="xmms vertical resize"
 # choose from all entries, sorted and uniqued
 if $DMENU_HAS_VERTICAL; then
     # choose an item in reverse order, showing also the date and page titles
-    # pick the last field from the first 3 fields. this way you can pick a url (prefixed with date & time) or type just a new url.
-    goto="$( tac "$UZBL_HISTORY_FILE" | $DMENU | cut -d ' ' -f -3  | awk '{ print $NF }' )"
+
+    # tac: output history in reverse, awk: remove duplicate URLs, $DMENU: present to dmenu,
+    # cut: get the first three fields, awk: pick the last field
+    # As opposed to just getting the third field directly, the combination of cut+awk allows
+    # to enter a completely new URL (which would be field number 1 or $NF, but not 3).
+    goto="$( tac "$UZBL_HISTORY_FILE" | awk '!a[$3]++' | $DMENU | cut -d ' ' -f -3  | awk '{ print $NF }' )"
 else
     readonly current="$( tail -n 1 "$UZBL_HISTORY_FILE" | cut -d ' ' -f 3 )"
     goto="$( ( print "$current\n"; cut -d ' ' -f 3 < "$UZBL_HISTORY_FILE" | grep -v -e "^$current\$" | sort -u ) | $DMENU )"