1 files changed, 83 insertions, 0 deletions
diff --git a/dom/html/HTMLPreElement.cpp b/dom/html/HTMLPreElement.cpp
new file mode 100644
index 0000000000..13628400d0
--- /dev/null
+++ b/dom/html/HTMLPreElement.cpp
@@ -0,0 +1,83 @@
+/* -*- 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/HTMLPreElement.h"
+#include "mozilla/dom/HTMLPreElementBinding.h"
+
+#include "mozilla/MappedDeclarationsBuilder.h"
+#include "nsAttrValueInlines.h"
+#include "nsGkAtoms.h"
+#include "nsStyleConsts.h"
+
+NS_IMPL_NS_NEW_HTML_ELEMENT(Pre)
+
+namespace mozilla::dom {
+
+HTMLPreElement::~HTMLPreElement() = default;
+
+NS_IMPL_ELEMENT_CLONE(HTMLPreElement)
+
+bool HTMLPreElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
+                                    const nsAString& aValue,
+                                    nsIPrincipal* aMaybeScriptedPrincipal,
+                                    nsAttrValue& aResult) {
+  if (aNamespaceID == kNameSpaceID_None) {
+    if (aAttribute == nsGkAtoms::width) {
+      return aResult.ParseIntValue(aValue);
+    }
+  }
+
+  return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
+                                              aMaybeScriptedPrincipal, aResult);
+}
+
+void HTMLPreElement::MapAttributesIntoRule(
+    MappedDeclarationsBuilder& aBuilder) {
+  // wrap: empty
+  if (aBuilder.GetAttr(nsGkAtoms::wrap)) {
+    // Equivalent to expanding `white-space: pre-wrap`
+    aBuilder.SetKeywordValue(eCSSProperty_white_space_collapse,
+                             StyleWhiteSpaceCollapse::Preserve);
+    aBuilder.SetKeywordValue(eCSSProperty_text_wrap_mode,
+                             StyleTextWrapMode::Wrap);
+  }
+
+  nsGenericHTMLElement::MapCommonAttributesInto(aBuilder);
+}
+
+NS_IMETHODIMP_(bool)
+HTMLPreElement::IsAttributeMapped(const nsAtom* aAttribute) const {
+  if (!mNodeInfo->Equals(nsGkAtoms::pre)) {
+    return nsGenericHTMLElement::IsAttributeMapped(aAttribute);
+  }
+
+  static const MappedAttributeEntry attributes[] = {
+      {nsGkAtoms::wrap},
+      {nullptr},
+  };
+
+  static const MappedAttributeEntry* const map[] = {
+      attributes,
+      sCommonAttributeMap,
+  };
+
+  return FindAttributeDependence(aAttribute, map);
+}
+
+nsMapRuleToAttributesFunc HTMLPreElement::GetAttributeMappingFunction() const {
+  if (!mNodeInfo->Equals(nsGkAtoms::pre)) {
+    return nsGenericHTMLElement::GetAttributeMappingFunction();
+  }
+
+  return &MapAttributesIntoRule;
+}
+
+JSObject* HTMLPreElement::WrapNode(JSContext* aCx,
+                                   JS::Handle<JSObject*> aGivenProto) {
+  return HTMLPreElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+}  // namespace mozilla::dom