DOMRectList interface implementation (#34025)

* rechecking all file changes and additions

Signed-off-by: L Ashwin B <lashwinib@gmail.com>

* added comments with specification links

Signed-off-by: L Ashwin B <lashwinib@gmail.com>

* added space before the links

Signed-off-by: L Ashwin B <lashwinib@gmail.com>

* modified the doc link format

Signed-off-by: L Ashwin B <lashwinib@gmail.com>

* suggested changes + updated interfaces.https.html + updated passing test expectations

Signed-off-by: L Ashwin B <lashwinib@gmail.com>

* needed to do an update-manifest

Signed-off-by: L Ashwin B <lashwinib@gmail.com>

* updated the idlharness.any.html expectations

Signed-off-by: L Ashwin B <lashwinib@gmail.com>

---------

Signed-off-by: L Ashwin B <lashwinib@gmail.com>

components/script/dom/domrectlist.rs

@@ -0,0 +1,66 @@
+/* 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 crate::dom::bindings::cell::DomRefCell;
+use crate::dom::bindings::codegen::Bindings::DOMRectListBinding::DOMRectListMethods;
+use crate::dom::bindings::reflector::{reflect_dom_object_with_proto, DomObject, Reflector};
+use crate::dom::bindings::root::{Dom, DomRoot};
+use crate::dom::domrect::DOMRect;
+use crate::dom::window::Window;
+use crate::script_runtime::CanGc;
+
+#[dom_struct]
+pub struct DOMRectList {
+    reflector_: Reflector,
+    rects: DomRefCell<Vec<Dom<DOMRect>>>,
+}
+
+impl DOMRectList {
+    fn new_inherited(rects: Vec<DomRoot<DOMRect>>) -> DOMRectList {
+        DOMRectList {
+            reflector_: Reflector::new(),
+            rects: DomRefCell::new(
+                rects
+                    .into_iter()
+                    .map(|dom_root| dom_root.as_traced())
+                    .collect(),
+            ),
+        }
+    }
+
+    pub fn new(
+        window: &Window,
+        rects: Vec<DomRoot<DOMRect>>,
+        can_gc: CanGc,
+    ) -> DomRoot<DOMRectList> {
+        reflect_dom_object_with_proto(
+            Box::new(DOMRectList::new_inherited(rects)),
+            &*window.global(),
+            None,
+            can_gc,
+        )
+    }
+
+    pub fn first(&self) -> Option<DomRoot<DOMRect>> {
+        self.rects.borrow().first().map(Dom::as_rooted)
+    }
+}
+
+impl DOMRectListMethods for DOMRectList {
+    /// <https://drafts.fxtf.org/geometry/#DOMRectList>
+    fn Item(&self, index: u32) -> Option<DomRoot<DOMRect>> {
+        self.rects.borrow().get(index as usize).map(Dom::as_rooted)
+    }
+
+    /// <https://drafts.fxtf.org/geometry/#DOMRectList>
+    fn IndexedGetter(&self, index: u32) -> Option<DomRoot<DOMRect>> {
+        self.Item(index)
+    }
+
+    /// <https://drafts.fxtf.org/geometry/#DOMRectList>
+    fn Length(&self) -> u32 {
+        self.rects.borrow().len() as u32
+    }
+}

components/script/dom/element.rs

@@ -103,6 +103,7 @@ use crate::dom::document::{
 };
 use crate::dom::documentfragment::DocumentFragment;
 use crate::dom::domrect::DOMRect;
+use crate::dom::domrectlist::DOMRectList;
 use crate::dom::domtokenlist::DOMTokenList;
 use crate::dom::elementinternals::ElementInternals;
 use crate::dom::eventtarget::EventTarget;
@@ -2431,10 +2432,10 @@ impl ElementMethods for Element {
     }
 
     // https://drafts.csswg.org/cssom-view/#dom-element-getclientrects
-    fn GetClientRects(&self, can_gc: CanGc) -> Vec<DomRoot<DOMRect>> {
+    fn GetClientRects(&self, can_gc: CanGc) -> DomRoot<DOMRectList> {
         let win = window_from_node(self);
         let raw_rects = self.upcast::<Node>().content_boxes(can_gc);
-        raw_rects
+        let rects: Vec<DomRoot<DOMRect>> = raw_rects
             .iter()
             .map(|rect| {
                 DOMRect::new(
@@ -2446,7 +2447,8 @@ impl ElementMethods for Element {
                     can_gc,
                 )
             })
-            .collect()
+            .collect();
+        DOMRectList::new(&win, rects, can_gc)
     }
 
     // https://drafts.csswg.org/cssom-view/#dom-element-getboundingclientrect

components/script/dom/mod.rs

@@ -294,6 +294,7 @@ pub mod dompoint;
 pub mod dompointreadonly;
 pub mod domquad;
 pub mod domrect;
+pub mod domrectlist;
 pub mod domrectreadonly;
 pub mod domstringlist;
 pub mod domstringmap;

components/script/dom/webidls/DOMRectList.webidl

@@ -0,0 +1,11 @@
+/* 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/. */
+
+// https://drafts.fxtf.org/geometry-1/#domrectlist
+
+[Exposed=Window]
+interface DOMRectList {
+    readonly attribute unsigned long length;
+    getter DOMRect? item(unsigned long index);
+};

components/script/dom/webidls/Element.webidl

@@ -88,7 +88,7 @@ interface Element : Node {
 
 // http://dev.w3.org/csswg/cssom-view/#extensions-to-the-element-interface
 partial interface Element {
-  sequence<DOMRect> getClientRects();
+  DOMRectList getClientRects();
   [NewObject]
   DOMRect getBoundingClientRect();