LibWeb/HTML: Update get_an_elements_noopener() to current spec

Note that this preemptively includes this fix to step 3:
whatwg/html#10962

Libraries/LibWeb/HTML/HTMLAnchorElement.h

@@ -65,9 +65,9 @@ class HTMLAnchorElement final
     {
         return get_an_elements_target(target);
     }
-    virtual TokenizedFeature::NoOpener hyperlink_element_utils_get_an_elements_noopener(StringView target) const override
+    virtual TokenizedFeature::NoOpener hyperlink_element_utils_get_an_elements_noopener(URL::URL const& url, StringView target) const override
     {
-        return get_an_elements_noopener(target);
+        return get_an_elements_noopener(url, target);
     }
 
     virtual Optional<ARIA::Role> default_role() const override;

Libraries/LibWeb/HTML/HTMLAreaElement.h

@@ -48,9 +48,9 @@ class HTMLAreaElement final
     {
         return get_an_elements_target(target);
     }
-    virtual TokenizedFeature::NoOpener hyperlink_element_utils_get_an_elements_noopener(StringView target) const override
+    virtual TokenizedFeature::NoOpener hyperlink_element_utils_get_an_elements_noopener(URL::URL const& url, StringView target) const override
     {
-        return get_an_elements_noopener(target);
+        return get_an_elements_noopener(url, target);
     }
 
     virtual Optional<ARIA::Role> default_role() const override;

Libraries/LibWeb/HTML/HTMLElement.cpp

@@ -930,9 +930,10 @@ String HTMLElement::get_an_elements_target(Optional<String> target) const
 }
 
 // https://html.spec.whatwg.org/multipage/links.html#get-an-element's-noopener
-TokenizedFeature::NoOpener HTMLElement::get_an_elements_noopener(StringView target) const
+TokenizedFeature::NoOpener HTMLElement::get_an_elements_noopener(URL::URL const& url, StringView target) const
 {
-    // To get an element's noopener, given an a, area, or form element element and a string target:
+    // To get an element's noopener, given an a, area, or form element element, a URL record url, and a string target,
+    // perform the following steps. They return a boolean.
     auto rel = MUST(get_attribute_value(HTML::AttributeNames::rel).to_lowercase());
     auto link_types = rel.bytes_as_string_view().split_view_if(Infra::is_ascii_whitespace);
 
@@ -945,7 +946,20 @@ TokenizedFeature::NoOpener HTMLElement::get_an_elements_noopener(StringView targ
     if (!link_types.contains_slow("opener"sv) && Infra::is_ascii_case_insensitive_match(target, "_blank"sv))
         return TokenizedFeature::NoOpener::Yes;
 
-    // 3. Return false.
+    // 3. If url's blob URL entry is not null:
+    if (url.blob_url_entry().has_value()) {
+        // 1. Let blobOrigin be url's blob URL entry's environment's origin.
+        auto const& blob_origin = url.blob_url_entry()->environment.origin;
+
+        // 2. Let topLevelOrigin be element's relevant settings object's top-level origin.
+        auto const& top_level_origin = relevant_settings_object(*this).top_level_origin;
+
+        // 3. If blobOrigin is not same site with topLevelOrigin, then return true.
+        if (!blob_origin.is_same_site(top_level_origin))
+            return TokenizedFeature::NoOpener::Yes;
+    }
+
+    // 4. Return false.
     return TokenizedFeature::NoOpener::No;
 }
 

Libraries/LibWeb/HTML/HTMLElement.h

@@ -117,7 +117,7 @@ class HTMLElement
     virtual Optional<ARIA::Role> default_role() const override;
 
     String get_an_elements_target(Optional<String> target = {}) const;
-    TokenizedFeature::NoOpener get_an_elements_noopener(StringView target) const;
+    TokenizedFeature::NoOpener get_an_elements_noopener(URL::URL const& url, StringView target) const;
 
     WebIDL::ExceptionOr<GC::Ref<ElementInternals>> attach_internals();
 

Libraries/LibWeb/HTML/HTMLFormElement.cpp

@@ -250,7 +250,7 @@ WebIDL::ExceptionOr<void> HTMLFormElement::submit_form(GC::Ref<HTMLElement> subm
     auto target = get_an_elements_target(form_target);
 
     // 21. Let noopener be the result of getting an element's noopener with form, parsed action, and target.
-    auto no_opener = get_an_elements_noopener(target);
+    auto no_opener = get_an_elements_noopener(*parsed_action, target);
 
     // 22. Let targetNavigable be the first return value of applying the rules for choosing a navigable given target,
     //     form's node navigable, and noopener.

Libraries/LibWeb/HTML/HTMLHyperlinkElementUtils.cpp

@@ -488,7 +488,7 @@ void HTMLHyperlinkElementUtils::follow_the_hyperlink(Optional<String> hyperlink_
         return;
 
     // 6. Let noopener be the result of getting an element's noopener with subject, urlRecord, and targetAttributeValue.
-    auto noopener = hyperlink_element_utils_get_an_elements_noopener(target_attribute_value);
+    auto noopener = hyperlink_element_utils_get_an_elements_noopener(*url_record, target_attribute_value);
 
     // 7. Let targetNavigable be the first return value of applying the rules for choosing a navigable given
     //    targetAttributeValue, subject's node navigable, and noopener.

Libraries/LibWeb/HTML/HTMLHyperlinkElementUtils.h

@@ -59,7 +59,7 @@ class HTMLHyperlinkElementUtils {
     virtual bool hyperlink_element_utils_is_html_anchor_element() const = 0;
     virtual bool hyperlink_element_utils_is_connected() const = 0;
     virtual String hyperlink_element_utils_get_an_elements_target(Optional<String> target = {}) const = 0;
-    virtual TokenizedFeature::NoOpener hyperlink_element_utils_get_an_elements_noopener(StringView target) const = 0;
+    virtual TokenizedFeature::NoOpener hyperlink_element_utils_get_an_elements_noopener(URL::URL const& url, StringView target) const = 0;
 
     virtual void hyperlink_element_utils_queue_an_element_task(HTML::Task::Source source, Function<void()> steps) = 0;