1 files changed, 93 insertions, 0 deletions
diff --git a/layout/forms/nsLegendFrame.cpp b/layout/forms/nsLegendFrame.cpp
new file mode 100644
index 0000000000..e42ed04738
--- /dev/null
+++ b/layout/forms/nsLegendFrame.cpp
@@ -0,0 +1,93 @@
+/* -*- 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 "nsLegendFrame.h"
+
+#include "mozilla/dom/HTMLLegendElement.h"
+#include "mozilla/PresShell.h"
+#include "ComputedStyle.h"
+#include "nsIContent.h"
+#include "nsGenericHTMLElement.h"
+#include "nsAttrValueInlines.h"
+#include "nsHTMLParts.h"
+#include "nsGkAtoms.h"
+#include "nsStyleConsts.h"
+#include "nsCheckboxRadioFrame.h"
+#include "WritingModes.h"
+
+using namespace mozilla;
+
+nsIFrame* NS_NewLegendFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
+#ifdef DEBUG
+  const nsStyleDisplay* disp = aStyle->StyleDisplay();
+  NS_ASSERTION(!disp->IsAbsolutelyPositionedStyle() && !disp->IsFloatingStyle(),
+               "Legends should not be positioned and should not float");
+#endif
+
+  nsIFrame* f =
+      new (aPresShell) nsLegendFrame(aStyle, aPresShell->GetPresContext());
+  f->AddStateBits(NS_BLOCK_FORMATTING_CONTEXT_STATE_BITS);
+  return f;
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsLegendFrame)
+
+void nsLegendFrame::DestroyFrom(nsIFrame* aDestructRoot,
+                                PostDestroyData& aPostDestroyData) {
+  nsCheckboxRadioFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
+  nsBlockFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
+}
+
+NS_QUERYFRAME_HEAD(nsLegendFrame)
+  NS_QUERYFRAME_ENTRY(nsLegendFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame)
+
+void nsLegendFrame::Reflow(nsPresContext* aPresContext,
+                           ReflowOutput& aDesiredSize,
+                           const ReflowInput& aReflowInput,
+                           nsReflowStatus& aStatus) {
+  DO_GLOBAL_REFLOW_COUNT("nsLegendFrame");
+  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
+  MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
+  if (mState & NS_FRAME_FIRST_REFLOW) {
+    nsCheckboxRadioFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), true);
+  }
+  return nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowInput,
+                              aStatus);
+}
+
+dom::HTMLLegendElement::LegendAlignValue nsLegendFrame::GetLogicalAlign(
+    WritingMode aCBWM) {
+  using LegendAlignValue = dom::HTMLLegendElement::LegendAlignValue;
+
+  auto* element = nsGenericHTMLElement::FromNode(mContent);
+  if (!element) {
+    return LegendAlignValue::InlineStart;
+  }
+
+  const nsAttrValue* attr = element->GetParsedAttr(nsGkAtoms::align);
+  if (!attr || attr->Type() != nsAttrValue::eEnum) {
+    return LegendAlignValue::InlineStart;
+  }
+
+  auto value = static_cast<LegendAlignValue>(attr->GetEnumValue());
+  switch (value) {
+    case LegendAlignValue::Left:
+      return aCBWM.IsBidiLTR() ? LegendAlignValue::InlineStart
+                               : LegendAlignValue::InlineEnd;
+    case LegendAlignValue::Right:
+      return aCBWM.IsBidiLTR() ? LegendAlignValue::InlineEnd
+                               : LegendAlignValue::InlineStart;
+    default:
+      return value;
+  }
+}
+
+#ifdef DEBUG_FRAME_DUMP
+nsresult nsLegendFrame::GetFrameName(nsAString& aResult) const {
+  return MakeFrameName(u"Legend"_ns, aResult);
+}
+#endif