summaryrefslogtreecommitdiffstats
path: root/layout/mathml/nsMathMLmrowFrame.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'layout/mathml/nsMathMLmrowFrame.cpp')
-rw-r--r--layout/mathml/nsMathMLmrowFrame.cpp68
1 files changed, 68 insertions, 0 deletions
diff --git a/layout/mathml/nsMathMLmrowFrame.cpp b/layout/mathml/nsMathMLmrowFrame.cpp
new file mode 100644
index 0000000000..abff988585
--- /dev/null
+++ b/layout/mathml/nsMathMLmrowFrame.cpp
@@ -0,0 +1,68 @@
+/* -*- 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 "nsMathMLmrowFrame.h"
+
+#include "mozilla/PresShell.h"
+#include "mozilla/gfx/2D.h"
+
+using namespace mozilla;
+
+//
+// <mrow> -- horizontally group any number of subexpressions - implementation
+//
+
+nsIFrame* NS_NewMathMLmrowFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
+ return new (aPresShell)
+ nsMathMLmrowFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmrowFrame)
+
+nsMathMLmrowFrame::~nsMathMLmrowFrame() = default;
+
+NS_IMETHODIMP
+nsMathMLmrowFrame::InheritAutomaticData(nsIFrame* aParent) {
+ // let the base class get the default from our parent
+ nsMathMLContainerFrame::InheritAutomaticData(aParent);
+
+ mPresentationData.flags |= NS_MATHML_STRETCH_ALL_CHILDREN_VERTICALLY;
+
+ return NS_OK;
+}
+
+nsresult nsMathMLmrowFrame::AttributeChanged(int32_t aNameSpaceID,
+ nsAtom* aAttribute,
+ int32_t aModType) {
+ // Special for <mtable>: In the frame construction code, we also use
+ // this frame class as a wrapper for mtable. Hence, we should pass the
+ // notification to the real mtable
+ if (mContent->IsMathMLElement(nsGkAtoms::mtable_)) {
+ nsIFrame* frame = mFrames.FirstChild();
+ for (; frame; frame = frame->PrincipalChildList().FirstChild()) {
+ // drill down to the real mtable
+ if (frame->IsTableWrapperFrame())
+ return frame->AttributeChanged(aNameSpaceID, aAttribute, aModType);
+ }
+ MOZ_ASSERT_UNREACHABLE("mtable wrapper without the real table frame");
+ }
+
+ return nsMathMLContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
+ aModType);
+}
+
+/* virtual */
+eMathMLFrameType nsMathMLmrowFrame::GetMathMLFrameType() {
+ if (!IsMrowLike()) {
+ nsIMathMLFrame* child = do_QueryFrame(mFrames.FirstChild());
+ if (child) {
+ // We only have one child, so we return the frame type of that child as if
+ // we didn't exist.
+ return child->GetMathMLFrameType();
+ }
+ }
+ return nsMathMLFrame::GetMathMLFrameType();
+}