1 files changed, 131 insertions, 0 deletions
diff --git a/layout/generic/DetailsFrame.cpp b/layout/generic/DetailsFrame.cpp
new file mode 100644
index 000000000..1d28bbe96
--- /dev/null
+++ b/layout/generic/DetailsFrame.cpp
@@ -0,0 +1,131 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "DetailsFrame.h"
+
+#include "mozilla/Attributes.h"
+#include "mozilla/dom/HTMLDetailsElement.h"
+#include "mozilla/dom/HTMLSummaryElement.h"
+#include "nsContentUtils.h"
+#include "nsPlaceholderFrame.h"
+#include "nsTextNode.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+NS_IMPL_FRAMEARENA_HELPERS(DetailsFrame)
+
+NS_QUERYFRAME_HEAD(DetailsFrame)
+  NS_QUERYFRAME_ENTRY(DetailsFrame)
+  NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
+NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame)
+
+nsBlockFrame*
+NS_NewDetailsFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+  return new (aPresShell) DetailsFrame(aContext);
+}
+
+DetailsFrame::DetailsFrame(nsStyleContext* aContext)
+  : nsBlockFrame(aContext)
+{
+}
+
+DetailsFrame::~DetailsFrame()
+{
+}
+
+nsIAtom*
+DetailsFrame::GetType() const
+{
+  return nsGkAtoms::detailsFrame;
+}
+
+void
+DetailsFrame::SetInitialChildList(ChildListID aListID, nsFrameList& aChildList)
+{
+#ifdef DEBUG
+  if (aListID == kPrincipalList) {
+    CheckValidMainSummary(aChildList);
+  }
+#endif
+
+  nsBlockFrame::SetInitialChildList(aListID, aChildList);
+}
+
+#ifdef DEBUG
+bool
+DetailsFrame::CheckValidMainSummary(const nsFrameList& aFrameList) const
+{
+  for (nsIFrame* child : aFrameList) {
+    HTMLSummaryElement* summary =
+      HTMLSummaryElement::FromContent(child->GetContent());
+
+    if (child == aFrameList.FirstChild()) {
+      if (summary && summary->IsMainSummary()) {
+        return true;
+      } else if (child->GetContent() == GetContent()) {
+        // The child frame's content is the same as our content, which means
+        // it's a kind of wrapper frame. Descend into its child list to find
+        // main summary.
+        if (CheckValidMainSummary(child->PrincipalChildList())) {
+          return true;
+        }
+      }
+    } else {
+      NS_ASSERTION(!summary || !summary->IsMainSummary(),
+                   "Rest of the children are either not summary element "
+                   "or are not the main summary!");
+    }
+  }
+  return false;
+}
+#endif
+
+void
+DetailsFrame::DestroyFrom(nsIFrame* aDestructRoot)
+{
+  nsContentUtils::DestroyAnonymousContent(&mDefaultSummary);
+  nsBlockFrame::DestroyFrom(aDestructRoot);
+}
+
+nsresult
+DetailsFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
+{
+  auto* details = HTMLDetailsElement::FromContent(GetContent());
+  if (details->GetFirstSummary()) {
+    return NS_OK;
+  }
+
+  // The <details> element lacks any direct <summary> child. Create a default
+  // <summary> element as an anonymous content.
+  nsNodeInfoManager* nodeInfoManager =
+    GetContent()->NodeInfo()->NodeInfoManager();
+
+  already_AddRefed<NodeInfo> nodeInfo =
+    nodeInfoManager->GetNodeInfo(nsGkAtoms::summary, nullptr, kNameSpaceID_XHTML,
+                                 nsIDOMNode::ELEMENT_NODE);
+  mDefaultSummary = new HTMLSummaryElement(nodeInfo);
+
+  nsXPIDLString defaultSummaryText;
+  nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES,
+                                     "DefaultSummary", defaultSummaryText);
+  RefPtr<nsTextNode> description = new nsTextNode(nodeInfoManager);
+  description->SetText(defaultSummaryText, false);
+  mDefaultSummary->AppendChildTo(description, false);
+
+  aElements.AppendElement(mDefaultSummary);
+
+  return NS_OK;
+}
+
+void
+DetailsFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
+                                       uint32_t aFilter)
+{
+  if (mDefaultSummary) {
+    aElements.AppendElement(mDefaultSummary);
+  }
+}