From c561a3eb0e72a4d20f23eef2d61549284e6dd237 Mon Sep 17 00:00:00 2001
From: CYBAI <cyb.ai.815@gmail.com>
Date: Thu, 4 Jun 2020 21:37:29 +0900
Subject: [PATCH] Introduce ElementCSSInlineStyle for SVGElement

---
 components/script/dom/create.rs               |  3 +-
 components/script/dom/svgelement.rs           | 41 +++++++++++++++++++
 components/script/dom/virtualmethods.rs       |  4 ++
 .../script/dom/webidls/SVGElement.webidl      |  3 +-
 4 files changed, 49 insertions(+), 2 deletions(-)

diff --git a/components/script/dom/create.rs b/components/script/dom/create.rs
index 62484c6f8618..37aaf07286fb 100644
--- a/components/script/dom/create.rs
+++ b/components/script/dom/create.rs
@@ -80,6 +80,7 @@ use crate::dom::htmltrackelement::HTMLTrackElement;
 use crate::dom::htmlulistelement::HTMLUListElement;
 use crate::dom::htmlunknownelement::HTMLUnknownElement;
 use crate::dom::htmlvideoelement::HTMLVideoElement;
+use crate::dom::svgelement::SVGElement;
 use crate::dom::svgsvgelement::SVGSVGElement;
 use crate::realms::{enter_realm, InRealm};
 use crate::script_thread::ScriptThread;
@@ -110,7 +111,7 @@ fn create_svg_element(
 
     match name.local {
         local_name!("svg") => make!(SVGSVGElement),
-        _ => Element::new(name.local, name.ns, prefix, document),
+        _ => make!(SVGElement),
     }
 }
 
diff --git a/components/script/dom/svgelement.rs b/components/script/dom/svgelement.rs
index a877cd908609..92c56c95c5d8 100644
--- a/components/script/dom/svgelement.rs
+++ b/components/script/dom/svgelement.rs
@@ -2,9 +2,14 @@
  * 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::codegen::Bindings::SVGElementBinding::SVGElementMethods;
 use crate::dom::bindings::inheritance::Castable;
+use crate::dom::bindings::root::{Dom, DomRoot, MutNullableDom};
+use crate::dom::cssstyledeclaration::{CSSModificationAccess, CSSStyleDeclaration, CSSStyleOwner};
 use crate::dom::document::Document;
 use crate::dom::element::Element;
+use crate::dom::node::window_from_node;
+use crate::dom::node::Node;
 use crate::dom::virtualmethods::VirtualMethods;
 use dom_struct::dom_struct;
 use html5ever::{LocalName, Prefix};
@@ -13,9 +18,18 @@ use style::element_state::ElementState;
 #[dom_struct]
 pub struct SVGElement {
     element: Element,
+    style_decl: MutNullableDom<CSSStyleDeclaration>,
 }
 
 impl SVGElement {
+    fn new_inherited(
+        tag_name: LocalName,
+        prefix: Option<Prefix>,
+        document: &Document,
+    ) -> SVGElement {
+        SVGElement::new_inherited_with_state(ElementState::empty(), tag_name, prefix, document)
+    }
+
     pub fn new_inherited_with_state(
         state: ElementState,
         tag_name: LocalName,
@@ -24,8 +38,20 @@ impl SVGElement {
     ) -> SVGElement {
         SVGElement {
             element: Element::new_inherited_with_state(state, tag_name, ns!(svg), prefix, document),
+            style_decl: Default::default(),
         }
     }
+
+    pub fn new(
+        tag_name: LocalName,
+        prefix: Option<Prefix>,
+        document: &Document,
+    ) -> DomRoot<SVGElement> {
+        Node::reflect_node(
+            Box::new(SVGElement::new_inherited(tag_name, prefix, document)),
+            document,
+        )
+    }
 }
 
 impl VirtualMethods for SVGElement {
@@ -33,3 +59,18 @@ impl VirtualMethods for SVGElement {
         Some(self.upcast::<Element>() as &dyn VirtualMethods)
     }
 }
+
+impl SVGElementMethods for SVGElement {
+    // https://html.spec.whatwg.org/multipage/#the-style-attribute
+    fn Style(&self) -> DomRoot<CSSStyleDeclaration> {
+        self.style_decl.or_init(|| {
+            let global = window_from_node(self);
+            CSSStyleDeclaration::new(
+                &global,
+                CSSStyleOwner::Element(Dom::from_ref(self.upcast())),
+                None,
+                CSSModificationAccess::ReadWrite,
+            )
+        })
+    }
+}
diff --git a/components/script/dom/virtualmethods.rs b/components/script/dom/virtualmethods.rs
index f3b8b6332322..9f175d8d621c 100644
--- a/components/script/dom/virtualmethods.rs
+++ b/components/script/dom/virtualmethods.rs
@@ -52,6 +52,7 @@ use crate::dom::htmltextareaelement::HTMLTextAreaElement;
 use crate::dom::htmltitleelement::HTMLTitleElement;
 use crate::dom::htmlvideoelement::HTMLVideoElement;
 use crate::dom::node::{BindContext, ChildrenMutation, CloneChildrenFlag, Node, UnbindContext};
+use crate::dom::svgelement::SVGElement;
 use crate::dom::svgsvgelement::SVGSVGElement;
 use html5ever::LocalName;
 use style::attr::AttrValue;
@@ -269,6 +270,9 @@ pub fn vtable_for(node: &Node) -> &dyn VirtualMethods {
         NodeTypeId::Element(ElementTypeId::SVGElement(SVGElementTypeId::SVGGraphicsElement(
             SVGGraphicsElementTypeId::SVGSVGElement,
         ))) => node.downcast::<SVGSVGElement>().unwrap() as &dyn VirtualMethods,
+        NodeTypeId::Element(ElementTypeId::SVGElement(SVGElementTypeId::SVGElement)) => {
+            node.downcast::<SVGElement>().unwrap() as &dyn VirtualMethods
+        },
         NodeTypeId::Element(ElementTypeId::Element) => {
             node.downcast::<Element>().unwrap() as &dyn VirtualMethods
         },
diff --git a/components/script/dom/webidls/SVGElement.webidl b/components/script/dom/webidls/SVGElement.webidl
index 51214b261164..2da7f062b890 100644
--- a/components/script/dom/webidls/SVGElement.webidl
+++ b/components/script/dom/webidls/SVGElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://svgwg.org/svg2-draft/types.html#InterfaceSVGElement
-[Exposed=Window, Abstract, Pref="dom.svg.enabled"]
+[Exposed=Window, Pref="dom.svg.enabled"]
 interface SVGElement : Element {
 
   //[SameObject] readonly attribute SVGAnimatedString className;
@@ -20,3 +20,4 @@ interface SVGElement : Element {
 
 //SVGElement includes GlobalEventHandlers;
 //SVGElement includes SVGElementInstance;
+SVGElement includes ElementCSSInlineStyle;