style: Reject non-positive resolution values in media queries.

Fixes https://bugzilla.mozilla.org/show_bug.cgi?id=1366961 See: w3c/csswg-drafts#1454
servo · May 23, 2017 · fa93d82 · fa93d82
1 parent e24d96c
commit fa93d82
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/components/style/gecko/media_queries.rs b/components/style/gecko/media_queries.rs
@@ -181,6 +181,10 @@ impl Resolution {
             _ => return Err(()),
         };
 
+        if value <= 0. {
+            return Err(())
+        }
+
         Ok(match_ignore_ascii_case! { &unit,
             "dpi" => Resolution::Dpi(value),
             "dppx" => Resolution::Dppx(value),