Implement referrerPolicy for HTMLLinkElement and HTMLScriptElement

components/script/dom/element.rs

@@ -3773,6 +3773,27 @@ pub fn set_cross_origin_attribute(element: &Element, value: Option<DOMString>) {
     }
 }
 
+pub fn reflect_referrer_policy_attribute(element: &Element) -> DOMString {
+    let attr =
+        element.get_attribute_by_name(DOMString::from_string(String::from("referrerpolicy")));
+
+    if let Some(mut val) = attr.map(|v| v.Value()) {
+        val.make_ascii_lowercase();
+        if val == "no-referrer" ||
+            val == "no-referrer-when-downgrade" ||
+            val == "same-origin" ||
+            val == "origin" ||
+            val == "strict-origin" ||
+            val == "origin-when-cross-origin" ||
+            val == "strict-origin-when-cross-origin" ||
+            val == "unsafe-url"
+        {
+            return val;
+        }
+    }
+    return DOMString::new();
+}
+
 pub(crate) fn referrer_policy_for_element(element: &Element) -> Option<ReferrerPolicy> {
     element
         .get_attribute_by_name(DOMString::from_string(String::from("referrerpolicy")))

components/script/dom/htmllinkelement.rs

@@ -13,7 +13,8 @@ use crate::dom::cssstylesheet::CSSStyleSheet;
 use crate::dom::document::Document;
 use crate::dom::domtokenlist::DOMTokenList;
 use crate::dom::element::{
-    cors_setting_for_element, reflect_cross_origin_attribute, set_cross_origin_attribute,
+    cors_setting_for_element, reflect_cross_origin_attribute, reflect_referrer_policy_attribute,
+    set_cross_origin_attribute,
 };
 use crate::dom::element::{AttributeMutation, Element, ElementCreator};
 use crate::dom::htmlelement::HTMLElement;
@@ -490,6 +491,14 @@ impl HTMLLinkElementMethods for HTMLLinkElement {
         set_cross_origin_attribute(self.upcast::<Element>(), value);
     }
 
+    // https://html.spec.whatwg.org/multipage/#dom-link-referrerpolicy
+    fn ReferrerPolicy(&self) -> DOMString {
+        reflect_referrer_policy_attribute(self.upcast::<Element>())
+    }
+
+    // https://html.spec.whatwg.org/multipage/#dom-link-referrerpolicy
+    make_setter!(SetReferrerPolicy, "referrerpolicy");
+
     // https://drafts.csswg.org/cssom/#dom-linkstyle-sheet
     fn GetSheet(&self) -> Option<DomRoot<DOMStyleSheet>> {
         self.get_cssom_stylesheet().map(DomRoot::upcast)

components/script/dom/htmlscriptelement.rs

@@ -16,7 +16,8 @@ use crate::dom::bindings::str::{DOMString, USVString};
 use crate::dom::bindings::trace::RootedTraceableBox;
 use crate::dom::document::Document;
 use crate::dom::element::{
-    cors_setting_for_element, reflect_cross_origin_attribute, set_cross_origin_attribute,
+    cors_setting_for_element, referrer_policy_for_element, reflect_cross_origin_attribute,
+    reflect_referrer_policy_attribute, set_cross_origin_attribute,
 };
 use crate::dom::element::{AttributeMutation, Element, ElementCreator};
 use crate::dom::event::{Event, EventBubbles, EventCancelable, EventStatus};
@@ -51,8 +52,10 @@ use msg::constellation_msg::PipelineId;
 use net_traits::request::{
     CorsSettings, CredentialsMode, Destination, ParserMetadata, RequestBuilder,
 };
-use net_traits::{FetchMetadata, FetchResponseListener, Metadata, NetworkError};
-use net_traits::{ResourceFetchTiming, ResourceTimingType};
+use net_traits::{
+    FetchMetadata, FetchResponseListener, Metadata, NetworkError, ResourceFetchTiming,
+    ResourceTimingType,
+};
 use servo_atoms::Atom;
 use servo_config::pref;
 use servo_url::ImmutableOrigin;
@@ -717,7 +720,7 @@ impl HTMLScriptElement {
             integrity_metadata: integrity_metadata.to_owned(),
             parser_metadata,
             referrer: self.global().get_referrer(),
-            referrer_policy: doc.get_referrer_policy(),
+            referrer_policy: referrer_policy_for_element(self.upcast::<Element>()),
             credentials_mode: module_credentials_mode,
         };
 
@@ -1352,6 +1355,14 @@ impl HTMLScriptElementMethods for HTMLScriptElement {
         set_cross_origin_attribute(self.upcast::<Element>(), value);
     }
 
+    // https://html.spec.whatwg.org/multipage/#dom-script-referrerpolicy
+    fn ReferrerPolicy(&self) -> DOMString {
+        reflect_referrer_policy_attribute(self.upcast::<Element>())
+    }
+
+    // https://html.spec.whatwg.org/multipage/#dom-script-referrerpolicy
+    make_setter!(SetReferrerPolicy, "referrerpolicy");
+
     // https://html.spec.whatwg.org/multipage/#dom-script-text
     fn Text(&self) -> DOMString {
         self.upcast::<Node>().child_text_content()

components/script/dom/webidls/HTMLLinkElement.webidl

@@ -22,7 +22,8 @@ interface HTMLLinkElement : HTMLElement {
            attribute DOMString type;
   [CEReactions]
            attribute DOMString integrity;
-  // [SameObject, PutForwards=value] readonly attribute DOMTokenList sizes;
+  [CEReactions]
+           attribute DOMString referrerPolicy;
 
   // also has obsolete members
 };

components/script/dom/webidls/HTMLScriptElement.webidl

@@ -25,6 +25,8 @@ interface HTMLScriptElement : HTMLElement {
            attribute DOMString text;
   [CEReactions]
            attribute DOMString integrity;
+  [CEReactions]
+           attribute DOMString referrerPolicy;
 
   // also has obsolete members
 };