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/* -*- 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 */
/* rendering object for CSS "display: ruby-text" */
#include "nsRubyTextFrame.h"
#include "mozilla/ComputedStyle.h"
#include "mozilla/PresShell.h"
#include "mozilla/WritingModes.h"
#include "nsLineLayout.h"
#include "nsPresContext.h"
using namespace mozilla;
// Frame class boilerplate
// =======================
nsContainerFrame* NS_NewRubyTextFrame(PresShell* aPresShell,
ComputedStyle* aStyle) {
return new (aPresShell) nsRubyTextFrame(aStyle, aPresShell->GetPresContext());
// nsRubyTextFrame Method Implementations
// ======================================
/* virtual */
bool nsRubyTextFrame::CanContinueTextRun() const { return false; }
nsresult nsRubyTextFrame::GetFrameName(nsAString& aResult) const {
return MakeFrameName(u"RubyText"_ns, aResult);
/* virtual */
void nsRubyTextFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
if (IsCollapsed()) {
nsRubyContentFrame::BuildDisplayList(aBuilder, aLists);
/* virtual */
void nsRubyTextFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
// Even if we want to hide this frame, we have to reflow it first.
// If we leave it dirty, changes to its content will never be
// propagated to the ancestors, then it won't be displayed even if
// the content is no longer the same, until next reflow triggered by
// some other change. In general, we always reflow all the frames we
// created. There might be other problems if we don't do that.
nsRubyContentFrame::Reflow(aPresContext, aDesiredSize, aReflowInput, aStatus);
if (IsCollapsed()) {
// Reset the ISize. The BSize is not changed so that it won't
// affect vertical positioning in unexpected way.
WritingMode lineWM = aReflowInput.mLineLayout->GetWritingMode();
aDesiredSize.ISize(lineWM) = 0;