Lua: fix IMDb script and listen to input changes

share/lua/extensions/imdb.lua

@@ -32,12 +32,12 @@ function descriptor()
                         .. "Movie Database (IMDb).\nThis Extension will show "
                         .. "you the cast, a short plot summary and a link to "
                         .. "the web page on imdb.org." ;
-             capabilities = {} }
+             capabilities = { "input-listener" } }
 end
 
 -- Update title text field. Removes file extensions.
 function update_title()
-    local item = vlc.item()
+    local item = vlc.input.item()
     local title = item and item:name()
     if title ~= nil then
         title = string.gsub(title, "(.*)(%.%w+)$", "%1")
@@ -47,11 +47,15 @@ function update_title()
     end
 end
 
+function input_changed()
+    update_title()
+end
+
 function create_dialog()
     dlg = vlc.dialog("IMDb Search")
     dlg:add_label("The Internet Movie Database", 1, 1, 4, 1)
     dlg:add_label("<b>Movie Title</b>", 1, 2, 1, 1)
-    local item = vlc.item()
+    local item = vlc.input.item()
     txt = dlg:add_text_input(item and item:name() or "", 2, 2, 1, 1)
     dlg:add_button("Okay", "click_okay", 3, 2, 1, 1)
     dlg:add_button("*", "update_title", 4, 2, 1, 1)