Make Document::DefaultView return a null value when there's no browsing context

7 files changed, 66 insertions, 28 deletions

diff --git a/components/script/dom/document.rs b/components/script/dom/document.rs
index 2a7466dc2eb..c142945d131 100644
--- a/components/script/dom/document.rs
+++ b/components/script/dom/document.rs
@@ -2551,8 +2551,12 @@ impl DocumentMethods for Document {
     }
 
     // https://html.spec.whatwg.org/multipage/#dom-document-defaultview
-    fn DefaultView(&self) -> Root<Window> {
-        Root::from_ref(&*self.window)
+    fn GetDefaultView(&self) -> Option<Root<Window>> {
+        if self.browsing_context.is_none() {
+            None
+        } else {
+            Some(Root::from_ref(&*self.window))
+        }
     }
 
     // https://html.spec.whatwg.org/multipage/#dom-document-cookie
diff --git a/components/script/dom/element.rs b/components/script/dom/element.rs
index 34791c3417c..e2398a14139 100644
--- a/components/script/dom/element.rs
+++ b/components/script/dom/element.rs
@@ -1297,7 +1297,10 @@ impl Element {
         }
 
         // Step 5
-        let win = doc.DefaultView();
+        let win = match doc.GetDefaultView() {
+            None => return,
+            Some(win) => win,
+        };
 
         // Step 7
         if *self.root_element() == *self {
@@ -1635,7 +1638,10 @@ impl ElementMethods for Element {
         }
 
         // Step 3
-        let win = doc.DefaultView();
+        let win = match doc.GetDefaultView() {
+            None => return 0.0,
+            Some(win) => win,
+        };
 
         // Step 5
         if *self.root_element() == *self {
@@ -1683,7 +1689,10 @@ impl ElementMethods for Element {
         }
 
         // Step 5
-        let win = doc.DefaultView();
+        let win = match doc.GetDefaultView() {
+            None => return,
+            Some(win) => win,
+        };
 
         // Step 7
         if *self.root_element() == *self {
@@ -1721,7 +1730,10 @@ impl ElementMethods for Element {
         }
 
         // Step 3
-        let win = doc.DefaultView();
+        let win = match doc.GetDefaultView() {
+            None => return 0.0,
+            Some(win) => win,
+        };
 
         // Step 5
         if *self.root_element() == *self {
@@ -1769,7 +1781,10 @@ impl ElementMethods for Element {
         }
 
         // Step 5
-        let win = doc.DefaultView();
+        let win = match doc.GetDefaultView() {
+            None => return,
+            Some(win) => win,
+        };
 
         // Step 7
         if *self.root_element() == *self {
diff --git a/components/script/dom/webidls/Document.webidl b/components/script/dom/webidls/Document.webidl
index 0e5c7b661a6..6b365378c92 100644
--- a/components/script/dom/webidls/Document.webidl
+++ b/components/script/dom/webidls/Document.webidl
@@ -118,7 +118,7 @@ partial /*sealed*/ interface Document {
   // void writeln(DOMString... text);
 
   // user interaction
-  readonly attribute Window/*Proxy?*/ defaultView;
+  readonly attribute Window?/*Proxy?*/ defaultView;
   readonly attribute Element? activeElement;
   boolean hasFocus();
   // attribute DOMString designMode;
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 7033fdde433..c6171166249 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -36030,6 +36030,12 @@
     "deleted_reftests": {},
     "items": {
       "testharness": {
+        "cssom-view/scrolling-no-browsing-context.html": [
+          {
+            "path": "cssom-view/scrolling-no-browsing-context.html",
+            "url": "/cssom-view/scrolling-no-browsing-context.html"
+          }
+        ],
         "url/url-domainToUnicode.html": [
           {
             "path": "url/url-domainToUnicode.html",
diff --git a/tests/wpt/metadata/XMLHttpRequest/responsexml-document-properties.htm.ini b/tests/wpt/metadata/XMLHttpRequest/responsexml-document-properties.htm.ini
index fd87c9906e8..65e883336d0 100644
--- a/tests/wpt/metadata/XMLHttpRequest/responsexml-document-properties.htm.ini
+++ b/tests/wpt/metadata/XMLHttpRequest/responsexml-document-properties.htm.ini
@@ -9,9 +9,6 @@
   [readyState]
     expected: FAIL
 
-  [defaultView]
-    expected: FAIL
-
   [body]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/Document-defaultView.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/Document-defaultView.html.ini
deleted file mode 100644
index 6ba3fcf80dd..00000000000
--- a/tests/wpt/metadata/html/browsers/the-window-object/Document-defaultView.html.ini
+++ /dev/null
@@ -1,17 +0,0 @@
-[Document-defaultView.html]
-  type: testharness
-  [Document created with the Document constructor]
-    expected: FAIL
-
-  [Document created with createDocument]
-    expected: FAIL
-
-  [Document created with createHTMLDocument]
-    expected: FAIL
-
-  [Document created with XML DOMParser]
-    expected: FAIL
-
-  [Document created with HTML DOMParser]
-    expected: FAIL
-
diff --git a/tests/wpt/web-platform-tests/cssom-view/scrolling-no-browsing-context.html b/tests/wpt/web-platform-tests/cssom-view/scrolling-no-browsing-context.html
new file mode 100644
index 00000000000..94357605b70
--- /dev/null
+++ b/tests/wpt/web-platform-tests/cssom-view/scrolling-no-browsing-context.html
@@ -0,0 +1,33 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>cssom-view scrolling-no-browsing-context</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+setup({explicit_done:true});
+window.onload = function () {
+    test(function () {
+        var doc = document.implementation.createDocument("http://example.com/", "html", null);
+
+        var element = doc.createElement("tag")
+        assert_equals(element.scrollTop, 0, "scrollTop should be always 0");
+        assert_equals(element.scrollLeft, 0, "scrollLeft should be always 0");
+
+        element.scrollTop = 10;
+        element.scrollLeft = 10;
+        assert_equals(element.scrollTop, 0, "scrollTop should be always 0");
+        assert_equals(element.scrollLeft, 0, "scrollLeft should be always 0");
+
+        element.scroll(10, 10);
+        assert_equals(element.scrollTop, 0, "scrollTop should be always 0");
+        assert_equals(element.scrollLeft, 0, "scrollLeft should be always 0");
+
+        element.scrollTo(10, 10);
+        assert_equals(element.scrollTop, 0, "scrollTop should be always 0");
+        assert_equals(element.scrollLeft, 0, "scrollLeft should be always 0");
+
+    }, "Element get and set scrollTop, scrollLeft, scroll() and scrollTo() test");
+
+    done();
+};
+</script>