script: Move HTML DOM interfaces to script/dom/html/ (#39046)

See #38901.

Testing: Refactor
Fixes: Partially #38901

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

components/script/dom/html/htmltitleelement.rs

@@ -0,0 +1,116 @@
+/* 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::cell::Cell;
+
+use dom_struct::dom_struct;
+use html5ever::{LocalName, Prefix};
+use js::rust::HandleObject;
+
+use crate::dom::bindings::codegen::Bindings::HTMLTitleElementBinding::HTMLTitleElementMethods;
+use crate::dom::bindings::inheritance::Castable;
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::bindings::str::DOMString;
+use crate::dom::document::Document;
+use crate::dom::html::htmlelement::HTMLElement;
+use crate::dom::node::{BindContext, ChildrenMutation, Node};
+use crate::dom::virtualmethods::VirtualMethods;
+use crate::script_runtime::CanGc;
+
+#[dom_struct]
+pub(crate) struct HTMLTitleElement {
+    htmlelement: HTMLElement,
+    popped: Cell<bool>,
+}
+
+impl HTMLTitleElement {
+    fn new_inherited(
+        local_name: LocalName,
+        prefix: Option<Prefix>,
+        document: &Document,
+    ) -> HTMLTitleElement {
+        HTMLTitleElement {
+            htmlelement: HTMLElement::new_inherited(local_name, prefix, document),
+            popped: Cell::new(false),
+        }
+    }
+
+    #[cfg_attr(crown, allow(crown::unrooted_must_root))]
+    pub(crate) fn new(
+        local_name: LocalName,
+        prefix: Option<Prefix>,
+        document: &Document,
+        proto: Option<HandleObject>,
+        can_gc: CanGc,
+    ) -> DomRoot<HTMLTitleElement> {
+        Node::reflect_node_with_proto(
+            Box::new(HTMLTitleElement::new_inherited(
+                local_name, prefix, document,
+            )),
+            document,
+            proto,
+            can_gc,
+        )
+    }
+
+    fn notify_title_changed(&self) {
+        let node = self.upcast::<Node>();
+        if node.is_in_a_document_tree() {
+            node.owner_doc().title_changed();
+        }
+    }
+}
+
+impl HTMLTitleElementMethods<crate::DomTypeHolder> for HTMLTitleElement {
+    // https://html.spec.whatwg.org/multipage/#dom-title-text
+    fn Text(&self) -> DOMString {
+        self.upcast::<Node>().child_text_content()
+    }
+
+    // https://html.spec.whatwg.org/multipage/#dom-title-text
+    fn SetText(&self, value: DOMString, can_gc: CanGc) {
+        self.upcast::<Node>()
+            .set_text_content_for_element(Some(value), can_gc)
+    }
+}
+
+impl VirtualMethods for HTMLTitleElement {
+    fn super_type(&self) -> Option<&dyn VirtualMethods> {
+        Some(self.upcast::<HTMLElement>() as &dyn VirtualMethods)
+    }
+
+    fn children_changed(&self, mutation: &ChildrenMutation) {
+        if let Some(s) = self.super_type() {
+            s.children_changed(mutation);
+        }
+
+        // Notify of title changes only after the initial full parsing
+        // of the element.
+        if self.popped.get() {
+            self.notify_title_changed();
+        }
+    }
+
+    fn bind_to_tree(&self, context: &BindContext, can_gc: CanGc) {
+        if let Some(s) = self.super_type() {
+            s.bind_to_tree(context, can_gc);
+        }
+        let node = self.upcast::<Node>();
+        if context.tree_is_in_a_document_tree {
+            node.owner_doc().title_changed();
+        }
+    }
+
+    fn pop(&self) {
+        if let Some(s) = self.super_type() {
+            s.pop();
+        }
+
+        self.popped.set(true);
+
+        // Initial notification of title change, once the full text
+        // is available.
+        self.notify_title_changed();
+    }
+}