1 files changed, 154 insertions, 0 deletions
diff --git a/dom/html/HTMLOutputElement.cpp b/dom/html/HTMLOutputElement.cpp
new file mode 100644
index 0000000000..10ec40891b
--- /dev/null
+++ b/dom/html/HTMLOutputElement.cpp
@@ -0,0 +1,154 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "mozilla/dom/HTMLOutputElement.h"
+
+#include "mozAutoDocUpdate.h"
+#include "mozilla/dom/HTMLFormElement.h"
+#include "mozilla/dom/HTMLOutputElementBinding.h"
+#include "nsContentUtils.h"
+#include "nsDOMTokenList.h"
+
+NS_IMPL_NS_NEW_HTML_ELEMENT_CHECK_PARSER(Output)
+
+namespace mozilla::dom {
+
+HTMLOutputElement::HTMLOutputElement(
+    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
+    FromParser aFromParser)
+    : nsGenericHTMLFormControlElement(std::move(aNodeInfo),
+                                      FormControlType::Output),
+      mValueModeFlag(eModeDefault),
+      mIsDoneAddingChildren(!aFromParser) {
+  AddMutationObserver(this);
+
+  // <output> is always barred from constraint validation since it is not a
+  // submittable element.
+  SetBarredFromConstraintValidation(true);
+}
+
+HTMLOutputElement::~HTMLOutputElement() = default;
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLOutputElement,
+                                   nsGenericHTMLFormControlElement, mValidity,
+                                   mTokenList)
+
+NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(HTMLOutputElement,
+                                             nsGenericHTMLFormControlElement,
+                                             nsIMutationObserver,
+                                             nsIConstraintValidation)
+
+NS_IMPL_ELEMENT_CLONE(HTMLOutputElement)
+
+void HTMLOutputElement::SetCustomValidity(const nsAString& aError) {
+  ConstraintValidation::SetCustomValidity(aError);
+
+  UpdateState(true);
+}
+
+NS_IMETHODIMP
+HTMLOutputElement::Reset() {
+  mValueModeFlag = eModeDefault;
+  // We can't pass mDefaultValue, because it'll be truncated when
+  // the element's descendants are changed, so pass a copy instead.
+  const nsAutoString currentDefaultValue(mDefaultValue);
+  return nsContentUtils::SetNodeTextContent(this, currentDefaultValue, true);
+}
+
+bool HTMLOutputElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
+                                       const nsAString& aValue,
+                                       nsIPrincipal* aMaybeScriptedPrincipal,
+                                       nsAttrValue& aResult) {
+  if (aNamespaceID == kNameSpaceID_None) {
+    if (aAttribute == nsGkAtoms::_for) {
+      aResult.ParseAtomArray(aValue);
+      return true;
+    }
+  }
+
+  return nsGenericHTMLFormControlElement::ParseAttribute(
+      aNamespaceID, aAttribute, aValue, aMaybeScriptedPrincipal, aResult);
+}
+
+void HTMLOutputElement::DoneAddingChildren(bool aHaveNotified) {
+  mIsDoneAddingChildren = true;
+  // We should update DefaultValue, after parsing is done.
+  DescendantsChanged();
+}
+
+nsresult HTMLOutputElement::BindToTree(BindContext& aContext,
+                                       nsINode& aParent) {
+  nsresult rv = nsGenericHTMLFormControlElement::BindToTree(aContext, aParent);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Unfortunately, we can actually end up having to change our state
+  // as a result of being bound to a tree even from the parser: we
+  // might end up a in a novalidate form, and unlike other form
+  // controls that on its own is enough to make change ui-valid state.
+  // So just go ahead and update our state now.
+  UpdateState(false);
+
+  return rv;
+}
+
+void HTMLOutputElement::GetValue(nsAString& aValue) const {
+  nsContentUtils::GetNodeTextContent(this, true, aValue);
+}
+
+void HTMLOutputElement::SetValue(const nsAString& aValue, ErrorResult& aRv) {
+  mValueModeFlag = eModeValue;
+  aRv = nsContentUtils::SetNodeTextContent(this, aValue, true);
+}
+
+void HTMLOutputElement::SetDefaultValue(const nsAString& aDefaultValue,
+                                        ErrorResult& aRv) {
+  mDefaultValue = aDefaultValue;
+  if (mValueModeFlag == eModeDefault) {
+    // We can't pass mDefaultValue, because it'll be truncated when
+    // the element's descendants are changed.
+    aRv = nsContentUtils::SetNodeTextContent(this, aDefaultValue, true);
+  }
+}
+
+nsDOMTokenList* HTMLOutputElement::HtmlFor() {
+  if (!mTokenList) {
+    mTokenList = new nsDOMTokenList(this, nsGkAtoms::_for);
+  }
+  return mTokenList;
+}
+
+void HTMLOutputElement::DescendantsChanged() {
+  if (mIsDoneAddingChildren && mValueModeFlag == eModeDefault) {
+    nsContentUtils::GetNodeTextContent(this, true, mDefaultValue);
+  }
+}
+
+// nsIMutationObserver
+
+void HTMLOutputElement::CharacterDataChanged(nsIContent* aContent,
+                                             const CharacterDataChangeInfo&) {
+  DescendantsChanged();
+}
+
+void HTMLOutputElement::ContentAppended(nsIContent* aFirstNewContent) {
+  DescendantsChanged();
+}
+
+void HTMLOutputElement::ContentInserted(nsIContent* aChild) {
+  DescendantsChanged();
+}
+
+void HTMLOutputElement::ContentRemoved(nsIContent* aChild,
+                                       nsIContent* aPreviousSibling) {
+  DescendantsChanged();
+}
+
+JSObject* HTMLOutputElement::WrapNode(JSContext* aCx,
+                                      JS::Handle<JSObject*> aGivenProto) {
+  return HTMLOutputElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+}  // namespace mozilla::dom