From 19f4be38d2e4e29626c4cc3b3066fa61986ac2b5 Mon Sep 17 00:00:00 2001
From: Josh Matthews <josh@joshmatthews.net>
Date: Tue, 5 May 2020 15:04:18 -0400
Subject: [PATCH] dom: Implement stub queryCommandSupported.

---
 components/script/dom/document.rs             |  5 +++++
 components/script/dom/webidls/Document.webidl |  2 +-
 .../html/dom/idlharness.https.html.ini        | 21 -------------------
 3 files changed, 6 insertions(+), 22 deletions(-)

diff --git a/components/script/dom/document.rs b/components/script/dom/document.rs
index 86c5b1caaa11..4577835d24e9 100644
--- a/components/script/dom/document.rs
+++ b/components/script/dom/document.rs
@@ -3669,6 +3669,11 @@ impl ProfilerMetadataFactory for Document {
 }
 
 impl DocumentMethods for Document {
+    // https://w3c.github.io/editing/ActiveDocuments/execCommand.html#querycommandsupported()
+    fn QueryCommandSupported(&self, _command: DOMString) -> bool {
+        false
+    }
+
     // https://drafts.csswg.org/cssom/#dom-document-stylesheets
     fn StyleSheets(&self) -> DomRoot<StyleSheetList> {
         self.stylesheet_list.or_init(|| {
diff --git a/components/script/dom/webidls/Document.webidl b/components/script/dom/webidls/Document.webidl
index 8ca4bbe50a13..d2429e514891 100644
--- a/components/script/dom/webidls/Document.webidl
+++ b/components/script/dom/webidls/Document.webidl
@@ -142,7 +142,7 @@ partial /*sealed*/ interface Document {
   // boolean queryCommandEnabled(DOMString commandId);
   // boolean queryCommandIndeterm(DOMString commandId);
   // boolean queryCommandState(DOMString commandId);
-  // boolean queryCommandSupported(DOMString commandId);
+  boolean queryCommandSupported(DOMString commandId);
   // DOMString queryCommandValue(DOMString commandId);
 
   // special event handler IDL attributes that only apply to Document objects
diff --git a/tests/wpt/metadata/html/dom/idlharness.https.html.ini b/tests/wpt/metadata/html/dom/idlharness.https.html.ini
index 3fa4a76ee55b..ead25462f306 100644
--- a/tests/wpt/metadata/html/dom/idlharness.https.html.ini
+++ b/tests/wpt/metadata/html/dom/idlharness.https.html.ini
@@ -1417,9 +1417,6 @@
   [Document interface: iframe.contentDocument must inherit property "dir" with the proper type]
     expected: FAIL
 
-  [Document interface: new Document() must inherit property "queryCommandSupported(DOMString)" with the proper type]
-    expected: FAIL
-
   [Window interface: attribute onsecuritypolicyviolation]
     expected: FAIL
 
@@ -1441,9 +1438,6 @@
   [Window interface: attribute menubar]
     expected: FAIL
 
-  [Document interface: calling queryCommandSupported(DOMString) on documentWithHandlers with too few arguments must throw TypeError]
-    expected: FAIL
-
   [Document interface: attribute designMode]
     expected: FAIL
 
@@ -1480,15 +1474,9 @@
   [Document interface: calling execCommand(DOMString, boolean, DOMString) on new Document() with too few arguments must throw TypeError]
     expected: FAIL
 
-  [Document interface: calling queryCommandSupported(DOMString) on new Document() with too few arguments must throw TypeError]
-    expected: FAIL
-
   [Window interface: operation focus()]
     expected: FAIL
 
-  [Document interface: documentWithHandlers must inherit property "queryCommandSupported(DOMString)" with the proper type]
-    expected: FAIL
-
   [Window interface: attribute scrollbars]
     expected: FAIL
 
@@ -1516,9 +1504,6 @@
   [Document interface: iframe.contentDocument must inherit property "queryCommandValue(DOMString)" with the proper type]
     expected: FAIL
 
-  [Document interface: operation queryCommandSupported(DOMString)]
-    expected: FAIL
-
   [Document interface: iframe.contentDocument must inherit property "all" with the proper type]
     expected: FAIL
 
@@ -1588,9 +1573,6 @@
   [Window interface: window must inherit property "blur()" with the proper type]
     expected: FAIL
 
-  [Document interface: iframe.contentDocument must inherit property "queryCommandSupported(DOMString)" with the proper type]
-    expected: FAIL
-
   [Document interface: calling execCommand(DOMString, boolean, DOMString) on iframe.contentDocument with too few arguments must throw TypeError]
     expected: FAIL
 
@@ -1621,9 +1603,6 @@
   [Document interface: iframe.contentDocument must inherit property "queryCommandEnabled(DOMString)" with the proper type]
     expected: FAIL
 
-  [Document interface: calling queryCommandSupported(DOMString) on iframe.contentDocument with too few arguments must throw TypeError]
-    expected: FAIL
-
   [Window interface: operation blur()]
     expected: FAIL