script: Initial stubs for Credential Management API (#38839)

Stubs `Credential`, `CredentialContainer`, and `PasswordCredential` and
adds the credentials attribute to navigator.

Testing: WPT
Fixes: Partially #38788

---------

Signed-off-by: Ashwin Naren <arihant2math@gmail.com>

components/script/dom/credentialmanagement/credential.rs

@@ -0,0 +1,73 @@
+/* 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 https://mozilla.org/MPL/2.0/. */
+use std::rc::Rc;
+
+use dom_struct::dom_struct;
+use script_bindings::realms::{AlreadyInRealm, InRealm};
+use script_bindings::str::{DOMString, USVString};
+
+use crate::dom::bindings::codegen::Bindings::CredentialBinding::CredentialMethods;
+use crate::dom::bindings::codegen::DomTypeHolder::DomTypeHolder;
+use crate::dom::bindings::reflector::{Reflector, reflect_dom_object};
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::promise::Promise;
+use crate::dom::window::Window;
+use crate::script_runtime::CanGc;
+
+#[dom_struct]
+pub(crate) struct Credential {
+    reflector_: Reflector,
+    id: USVString,
+    credential_type: DOMString,
+}
+
+impl Credential {
+    pub(crate) fn new_inherited(id: USVString, credential_type: DOMString) -> Credential {
+        Credential {
+            reflector_: Reflector::new(),
+            id,
+            credential_type,
+        }
+    }
+
+    #[expect(dead_code)]
+    pub(crate) fn new(
+        global: &GlobalScope,
+        id: USVString,
+        credential_type: DOMString,
+        can_gc: CanGc,
+    ) -> DomRoot<Credential> {
+        reflect_dom_object(
+            Box::new(Credential::new_inherited(id, credential_type)),
+            global,
+            can_gc,
+        )
+    }
+}
+
+impl CredentialMethods<DomTypeHolder> for Credential {
+    // https://www.w3.org/TR/credential-management-1/#dom-credential-id
+    fn Id(&self) -> USVString {
+        self.id.clone()
+    }
+
+    // https://www.w3.org/TR/credential-management-1/#dom-credential-type
+    fn Type(&self) -> DOMString {
+        self.credential_type.clone()
+    }
+
+    // https://www.w3.org/TR/credential-management-1/#dom-credential-isconditionalmediationavailable
+    fn IsConditionalMediationAvailable(_global: &Window) -> Rc<Promise> {
+        let in_realm_proof = AlreadyInRealm::assert::<DomTypeHolder>();
+        // FIXME:(arihant2math) return false
+        Promise::new_in_current_realm(InRealm::Already(&in_realm_proof), CanGc::note())
+    }
+
+    // https://www.w3.org/TR/credential-management-1/#dom-credential-willrequestconditionalcreation
+    fn WillRequestConditionalCreation(_global: &Window) -> Rc<Promise> {
+        let in_realm_proof = AlreadyInRealm::assert::<DomTypeHolder>();
+        Promise::new_in_current_realm(InRealm::Already(&in_realm_proof), CanGc::note())
+    }
+}

components/script/dom/credentialmanagement/credentialscontainer.rs

@@ -0,0 +1,62 @@
+/* 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 https://mozilla.org/MPL/2.0/. */
+use std::rc::Rc;
+
+use dom_struct::dom_struct;
+use script_bindings::codegen::GenericBindings::CredentialsContainerBinding::{
+    CredentialCreationOptions, CredentialRequestOptions,
+};
+use script_bindings::error::{Error, Fallible};
+
+use crate::dom::bindings::codegen::Bindings::CredentialsContainerBinding::CredentialsContainerMethods;
+use crate::dom::bindings::codegen::DomTypeHolder::DomTypeHolder;
+use crate::dom::bindings::reflector::{Reflector, reflect_dom_object};
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::credentialmanagement::credential::Credential;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::promise::Promise;
+use crate::script_runtime::CanGc;
+
+#[dom_struct]
+pub(crate) struct CredentialsContainer {
+    reflector_: Reflector,
+}
+
+impl CredentialsContainer {
+    pub(crate) fn new_inherited() -> CredentialsContainer {
+        CredentialsContainer {
+            reflector_: Reflector::new(),
+        }
+    }
+
+    pub(crate) fn new(global: &GlobalScope, can_gc: CanGc) -> DomRoot<CredentialsContainer> {
+        reflect_dom_object(
+            Box::new(CredentialsContainer::new_inherited()),
+            global,
+            can_gc,
+        )
+    }
+}
+
+impl CredentialsContainerMethods<DomTypeHolder> for CredentialsContainer {
+    // https://www.w3.org/TR/credential-management-1/#dom-credentialscontainer-get
+    fn Get(&self, _options: &CredentialRequestOptions<DomTypeHolder>) -> Fallible<Rc<Promise>> {
+        Err(Error::NotSupported)
+    }
+
+    // https://www.w3.org/TR/credential-management-1/#dom-credentialscontainer-store
+    fn Store(&self, _credential: &Credential) -> Fallible<Rc<Promise>> {
+        Err(Error::NotSupported)
+    }
+
+    // https://www.w3.org/TR/credential-management-1/#dom-credentialscontainer-create
+    fn Create(&self, _options: &CredentialCreationOptions<DomTypeHolder>) -> Fallible<Rc<Promise>> {
+        Err(Error::NotSupported)
+    }
+
+    // https://www.w3.org/TR/credential-management-1/#dom-credentialscontainer-preventsilentaccess
+    fn PreventSilentAccess(&self) -> Fallible<Rc<Promise>> {
+        Err(Error::NotSupported)
+    }
+}

components/script/dom/credentialmanagement/mod.rs

@@ -0,0 +1,7 @@
+/* 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 https://mozilla.org/MPL/2.0/. */
+
+pub(crate) mod credential;
+pub(crate) mod credentialscontainer;
+pub(crate) mod passwordcredential;

components/script/dom/credentialmanagement/passwordcredential.rs

@@ -0,0 +1,98 @@
+/* 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 https://mozilla.org/MPL/2.0/. */
+
+use dom_struct::dom_struct;
+use js::gc::HandleObject;
+use script_bindings::codegen::GenericBindings::PasswordCredentialBinding::PasswordCredentialData;
+use script_bindings::error::{Error, Fallible};
+use script_bindings::str::USVString;
+
+use crate::dom::bindings::codegen::Bindings::PasswordCredentialBinding::PasswordCredentialMethods;
+use crate::dom::bindings::codegen::DomTypeHolder::DomTypeHolder;
+use crate::dom::bindings::reflector::{reflect_dom_object, reflect_dom_object_with_proto};
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::credentialmanagement::credential::Credential;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::htmlformelement::HTMLFormElement;
+use crate::dom::window::Window;
+use crate::script_runtime::CanGc;
+
+#[dom_struct]
+pub(crate) struct PasswordCredential {
+    credential: Credential,
+    origin: USVString,
+    password: USVString,
+}
+
+impl PasswordCredential {
+    fn new_inherited(id: USVString, origin: USVString, password: USVString) -> PasswordCredential {
+        PasswordCredential {
+            credential: Credential::new_inherited(id, "password".into()),
+            origin,
+            password,
+        }
+    }
+
+    #[expect(dead_code)]
+    pub(crate) fn new(
+        global: &GlobalScope,
+        id: USVString,
+        origin: USVString,
+        password: USVString,
+        can_gc: CanGc,
+    ) -> DomRoot<PasswordCredential> {
+        reflect_dom_object(
+            Box::new(PasswordCredential::new_inherited(id, origin, password)),
+            global,
+            can_gc,
+        )
+    }
+
+    pub(crate) fn new_with_proto(
+        global: &GlobalScope,
+        proto: Option<HandleObject>,
+        id: USVString,
+        origin: USVString,
+        password: USVString,
+        can_gc: CanGc,
+    ) -> DomRoot<PasswordCredential> {
+        reflect_dom_object_with_proto(
+            Box::new(PasswordCredential::new_inherited(id, origin, password)),
+            global,
+            proto,
+            can_gc,
+        )
+    }
+}
+
+impl PasswordCredentialMethods<DomTypeHolder> for PasswordCredential {
+    fn Password(&self) -> USVString {
+        self.password.clone()
+    }
+
+    fn Constructor(
+        _global: &Window,
+        _proto: Option<HandleObject>,
+        _can_gc: CanGc,
+        _form: &HTMLFormElement,
+    ) -> Fallible<DomRoot<PasswordCredential>> {
+        Err(Error::NotSupported)
+    }
+
+    fn Constructor_(
+        global: &Window,
+        proto: Option<HandleObject>,
+        can_gc: CanGc,
+        data: &PasswordCredentialData,
+    ) -> Fallible<DomRoot<PasswordCredential>> {
+        Ok(Self::new_with_proto(
+            global.as_global_scope(),
+            proto,
+            data.parent.id.clone(),
+            data.origin.clone(),
+            data.password.clone(),
+            can_gc,
+        ))
+    }
+}