From de45820b64ab03768336c7242622ef9f499347cf Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <email@mattatobin.com>
Date: Thu, 16 Apr 2020 20:19:06 -0400
Subject: Bug 1346623 - Allow anonymous content created with
 nsIDocument::InsertAnonymousContent can change from non-native to native AC

* Prevent canvas custom content from becoming NAC when reframing the root element
* Add an API to get computed style values through an AnonymousContent object

Tag #1375
---
 dom/webidl/AnonymousContent.webidl | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'dom/webidl')

diff --git a/dom/webidl/AnonymousContent.webidl b/dom/webidl/AnonymousContent.webidl
index 6755fe598..8be69cd26 100644
--- a/dom/webidl/AnonymousContent.webidl
+++ b/dom/webidl/AnonymousContent.webidl
@@ -77,4 +77,12 @@ interface AnonymousContent {
   [Throws]
   void setCutoutRectsForElement(DOMString elementId,
                                 sequence<DOMRect> rects);
+
+  /**
+   * Get the computed value of a property on an element inside this custom
+   * anonymous content.
+   */
+  [Throws]
+  DOMString? getComputedStylePropertyValue(DOMString elementId,
+                                           DOMString propertyName);
 };
-- 
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