Auto merge of #22218 - CYBAI:sw-up-to-date, r=jdm

Implement NavigationPreloadManager for ServiceWorker

---
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix part of #19302 .
- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because _____

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5 files changed, 199 insertions, 4 deletions

diff --git a/components/script/dom/mod.rs b/components/script/dom/mod.rs
index b9a9bc60663..7c1aa2593ee 100644
--- a/components/script/dom/mod.rs
+++ b/components/script/dom/mod.rs
@@ -398,6 +398,7 @@ pub mod mouseevent;
 pub mod mutationobserver;
 pub mod mutationrecord;
 pub mod namednodemap;
+pub mod navigationpreloadmanager;
 pub mod navigator;
 pub mod navigatorinfo;
 pub mod node;
diff --git a/components/script/dom/navigationpreloadmanager.rs b/components/script/dom/navigationpreloadmanager.rs
new file mode 100644
index 00000000000..f955f6af9eb
--- /dev/null
+++ b/components/script/dom/navigationpreloadmanager.rs
@@ -0,0 +1,141 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use crate::dom::bindings::codegen::Bindings::NavigationPreloadManagerBinding::NavigationPreloadState;
+use crate::dom::bindings::codegen::Bindings::NavigationPreloadManagerBinding::{
+    NavigationPreloadManagerMethods, Wrap,
+};
+use crate::dom::bindings::reflector::{reflect_dom_object, DomObject, Reflector};
+use crate::dom::bindings::root::{Dom, DomRoot};
+use crate::dom::bindings::str::ByteString;
+use crate::dom::domexception::{DOMErrorName, DOMException};
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::promise::Promise;
+use crate::dom::serviceworkerregistration::ServiceWorkerRegistration;
+use dom_struct::dom_struct;
+use js::jsval::UndefinedValue;
+use std::rc::Rc;
+
+#[dom_struct]
+pub struct NavigationPreloadManager {
+    reflector_: Reflector,
+    serviceworker_registration: Dom<ServiceWorkerRegistration>,
+}
+
+impl NavigationPreloadManager {
+    fn new_inherited(registration: &ServiceWorkerRegistration) -> NavigationPreloadManager {
+        NavigationPreloadManager {
+            reflector_: Reflector::new(),
+            serviceworker_registration: Dom::from_ref(registration),
+        }
+    }
+
+    #[allow(unrooted_must_root)]
+    pub fn new(
+        global: &GlobalScope,
+        registration: &ServiceWorkerRegistration,
+    ) -> DomRoot<NavigationPreloadManager> {
+        let manager = NavigationPreloadManager::new_inherited(&*registration);
+        reflect_dom_object(Box::new(manager), global, Wrap)
+    }
+}
+
+impl NavigationPreloadManagerMethods for NavigationPreloadManager {
+    #[allow(unrooted_must_root)]
+    // https://w3c.github.io/ServiceWorker/#navigation-preload-manager-enable
+    fn Enable(&self) -> Rc<Promise> {
+        let promise = Promise::new(&*self.global());
+
+        // 2.
+        if self.serviceworker_registration.active().is_none() {
+            promise.reject_native(&DOMException::new(
+                &self.global(),
+                DOMErrorName::InvalidStateError,
+            ));
+        } else {
+            // 3.
+            self.serviceworker_registration
+                .set_navigation_preload_enabled(true);
+
+            // 4.
+            promise.resolve_native(&UndefinedValue());
+        }
+
+        promise
+    }
+
+    #[allow(unrooted_must_root)]
+    // https://w3c.github.io/ServiceWorker/#navigation-preload-manager-disable
+    fn Disable(&self) -> Rc<Promise> {
+        let promise = Promise::new(&*self.global());
+
+        // 2.
+        if self.serviceworker_registration.active().is_none() {
+            promise.reject_native(&DOMException::new(
+                &self.global(),
+                DOMErrorName::InvalidStateError,
+            ));
+        } else {
+            // 3.
+            self.serviceworker_registration
+                .set_navigation_preload_enabled(false);
+
+            // 4.
+            promise.resolve_native(&UndefinedValue());
+        }
+
+        promise
+    }
+
+    #[allow(unrooted_must_root)]
+    // https://w3c.github.io/ServiceWorker/#navigation-preload-manager-setheadervalue
+    fn SetHeaderValue(&self, value: ByteString) -> Rc<Promise> {
+        let promise = Promise::new(&*self.global());
+
+        // 2.
+        if self.serviceworker_registration.active().is_none() {
+            promise.reject_native(&DOMException::new(
+                &self.global(),
+                DOMErrorName::InvalidStateError,
+            ));
+        } else {
+            // 3.
+            self.serviceworker_registration
+                .set_navigation_preload_header_value(value);
+
+            // 4.
+            promise.resolve_native(&UndefinedValue());
+        }
+
+        promise
+    }
+
+    #[allow(unrooted_must_root)]
+    // https://w3c.github.io/ServiceWorker/#navigation-preload-manager-getstate
+    fn GetState(&self) -> Rc<Promise> {
+        let promise = Promise::new(&*self.global());
+        // 2.
+        let mut state = NavigationPreloadState::empty();
+
+        // 3.
+        if let Some(_) = self.serviceworker_registration.active() {
+            if self
+                .serviceworker_registration
+                .get_navigation_preload_enabled()
+            {
+                state.enabled = true;
+            }
+        }
+
+        // 4.
+        state.headerValue = self
+            .serviceworker_registration
+            .get_navigation_preload_header_value();
+
+        // 5.
+        promise.resolve_native(&state);
+
+        promise
+    }
+}
diff --git a/components/script/dom/serviceworkerregistration.rs b/components/script/dom/serviceworkerregistration.rs
index cb0e7996b35..a2165a82115 100644
--- a/components/script/dom/serviceworkerregistration.rs
+++ b/components/script/dom/serviceworkerregistration.rs
@@ -2,16 +2,18 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
+use crate::dom::bindings::cell::DomRefCell;
 use crate::dom::bindings::codegen::Bindings::ServiceWorkerBinding::ServiceWorkerState;
 use crate::dom::bindings::codegen::Bindings::ServiceWorkerRegistrationBinding::ServiceWorkerUpdateViaCache;
 use crate::dom::bindings::codegen::Bindings::ServiceWorkerRegistrationBinding::{
     ServiceWorkerRegistrationMethods, Wrap,
 };
-use crate::dom::bindings::reflector::reflect_dom_object;
-use crate::dom::bindings::root::{Dom, DomRoot};
-use crate::dom::bindings::str::USVString;
+use crate::dom::bindings::reflector::{reflect_dom_object, DomObject};
+use crate::dom::bindings::root::{Dom, DomRoot, MutNullableDom};
+use crate::dom::bindings::str::{ByteString, USVString};
 use crate::dom::eventtarget::EventTarget;
 use crate::dom::globalscope::GlobalScope;
+use crate::dom::navigationpreloadmanager::NavigationPreloadManager;
 use crate::dom::serviceworker::ServiceWorker;
 use crate::dom::workerglobalscope::prepare_workerscope_init;
 use dom_struct::dom_struct;
@@ -25,7 +27,10 @@ pub struct ServiceWorkerRegistration {
     active: Option<Dom<ServiceWorker>>,
     installing: Option<Dom<ServiceWorker>>,
     waiting: Option<Dom<ServiceWorker>>,
+    navigation_preload: MutNullableDom<NavigationPreloadManager>,
     scope: ServoUrl,
+    navigation_preload_enabled: Cell<bool>,
+    navigation_preload_header_value: DomRefCell<Option<ByteString>>,
     update_via_cache: ServiceWorkerUpdateViaCache,
     uninstalling: Cell<bool>,
 }
@@ -37,7 +42,10 @@ impl ServiceWorkerRegistration {
             active: Some(Dom::from_ref(active_sw)),
             installing: None,
             waiting: None,
+            navigation_preload: MutNullableDom::new(None),
             scope: scope,
+            navigation_preload_enabled: Cell::new(false),
+            navigation_preload_header_value: DomRefCell::new(None),
             update_via_cache: ServiceWorkerUpdateViaCache::Imports,
             uninstalling: Cell::new(false),
         }
@@ -52,6 +60,7 @@ impl ServiceWorkerRegistration {
         let active_worker =
             ServiceWorker::install_serviceworker(global, script_url.clone(), scope.clone(), true);
         active_worker.set_transition_state(ServiceWorkerState::Installed);
+
         reflect_dom_object(
             Box::new(ServiceWorkerRegistration::new_inherited(
                 &*active_worker,
@@ -62,10 +71,31 @@ impl ServiceWorkerRegistration {
         )
     }
 
+    pub fn active(&self) -> Option<&ServiceWorker> {
+        self.active.as_ref().map(|sw| &**sw)
+    }
+
     pub fn get_installed(&self) -> &ServiceWorker {
         self.active.as_ref().unwrap()
     }
 
+    pub fn get_navigation_preload_header_value(&self) -> Option<ByteString> {
+        self.navigation_preload_header_value.borrow().clone()
+    }
+
+    pub fn set_navigation_preload_header_value(&self, value: ByteString) {
+        let mut header_value = self.navigation_preload_header_value.borrow_mut();
+        *header_value = Some(value);
+    }
+
+    pub fn get_navigation_preload_enabled(&self) -> bool {
+        self.navigation_preload_enabled.get()
+    }
+
+    pub fn set_navigation_preload_enabled(&self, flag: bool) {
+        self.navigation_preload_enabled.set(flag)
+    }
+
     pub fn get_uninstalling(&self) -> bool {
         self.uninstalling.get()
     }
@@ -147,4 +177,10 @@ impl ServiceWorkerRegistrationMethods for ServiceWorkerRegistration {
     fn UpdateViaCache(&self) -> ServiceWorkerUpdateViaCache {
         self.update_via_cache
     }
+
+    // https://w3c.github.io/ServiceWorker/#service-worker-registration-navigationpreload
+    fn NavigationPreload(&self) -> DomRoot<NavigationPreloadManager> {
+        self.navigation_preload
+            .or_init(|| NavigationPreloadManager::new(&self.global(), &self))
+    }
 }
diff --git a/components/script/dom/webidls/NavigationPreloadManager.webidl b/components/script/dom/webidls/NavigationPreloadManager.webidl
new file mode 100644
index 00000000000..23988251fb1
--- /dev/null
+++ b/components/script/dom/webidls/NavigationPreloadManager.webidl
@@ -0,0 +1,17 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// https://w3c.github.io/ServiceWorker/#navigation-preload-manager
+[Pref="dom.serviceworker.enabled", SecureContext, Exposed=(Window,Worker)]
+interface NavigationPreloadManager {
+  Promise<void> enable();
+  Promise<void> disable();
+  Promise<void> setHeaderValue(ByteString value);
+  Promise<NavigationPreloadState> getState();
+};
+
+dictionary NavigationPreloadState {
+  boolean enabled = false;
+  ByteString headerValue;
+};
diff --git a/components/script/dom/webidls/ServiceWorkerRegistration.webidl b/components/script/dom/webidls/ServiceWorkerRegistration.webidl
index 014f52ad27c..f7a10659513 100644
--- a/components/script/dom/webidls/ServiceWorkerRegistration.webidl
+++ b/components/script/dom/webidls/ServiceWorkerRegistration.webidl
@@ -8,7 +8,7 @@ interface ServiceWorkerRegistration : EventTarget {
   readonly attribute ServiceWorker? installing;
   readonly attribute ServiceWorker? waiting;
   readonly attribute ServiceWorker? active;
-  // [SameObject] readonly attribute NavigationPreloadManager navigationPreload;
+  [SameObject] readonly attribute NavigationPreloadManager navigationPreload;
 
   readonly attribute USVString scope;
   readonly attribute ServiceWorkerUpdateViaCache updateViaCache;