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/* -*- Mode: C++; tab-width: 2; 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 "RubyUtils.h"
#include "nsRubyFrame.h"
#include "nsRubyBaseFrame.h"
#include "nsRubyTextFrame.h"
#include "nsRubyBaseContainerFrame.h"
#include "nsRubyTextContainerFrame.h"
using namespace mozilla;
NS_DECLARE_FRAME_PROPERTY_SMALL_VALUE(ReservedISize, nscoord)
/* static */ void
RubyUtils::SetReservedISize(nsIFrame* aFrame, nscoord aISize)
{
MOZ_ASSERT(IsExpandableRubyBox(aFrame));
aFrame->Properties().Set(ReservedISize(), aISize);
}
/* static */ void
RubyUtils::ClearReservedISize(nsIFrame* aFrame)
{
MOZ_ASSERT(IsExpandableRubyBox(aFrame));
aFrame->Properties().Remove(ReservedISize());
}
/* static */ nscoord
RubyUtils::GetReservedISize(nsIFrame* aFrame)
{
MOZ_ASSERT(IsExpandableRubyBox(aFrame));
return aFrame->Properties().Get(ReservedISize());
}
AutoRubyTextContainerArray::AutoRubyTextContainerArray(
nsRubyBaseContainerFrame* aBaseContainer)
{
for (nsIFrame* frame = aBaseContainer->GetNextSibling();
frame && frame->GetType() == nsGkAtoms::rubyTextContainerFrame;
frame = frame->GetNextSibling()) {
AppendElement(static_cast<nsRubyTextContainerFrame*>(frame));
}
}
nsIFrame*
RubyColumn::Iterator::operator*() const
{
nsIFrame* frame;
if (mIndex == -1) {
frame = mColumn.mBaseFrame;
} else {
frame = mColumn.mTextFrames[mIndex];
}
MOZ_ASSERT(frame, "Frame here cannot be null");
return frame;
}
void
RubyColumn::Iterator::SkipUntilExistingFrame()
{
if (mIndex == -1) {
if (mColumn.mBaseFrame) {
return;
}
++mIndex;
}
int32_t numTextFrames = mColumn.mTextFrames.Length();
for (; mIndex < numTextFrames; ++mIndex) {
if (mColumn.mTextFrames[mIndex]) {
break;
}
}
}
RubySegmentEnumerator::RubySegmentEnumerator(nsRubyFrame* aRubyFrame)
{
nsIFrame* frame = aRubyFrame->PrincipalChildList().FirstChild();
MOZ_ASSERT(!frame ||
frame->GetType() == nsGkAtoms::rubyBaseContainerFrame);
mBaseContainer = static_cast<nsRubyBaseContainerFrame*>(frame);
}
void
RubySegmentEnumerator::Next()
{
MOZ_ASSERT(mBaseContainer);
nsIFrame* frame = mBaseContainer->GetNextSibling();
while (frame && frame->GetType() != nsGkAtoms::rubyBaseContainerFrame) {
frame = frame->GetNextSibling();
}
mBaseContainer = static_cast<nsRubyBaseContainerFrame*>(frame);
}
RubyColumnEnumerator::RubyColumnEnumerator(
nsRubyBaseContainerFrame* aBaseContainer,
const AutoRubyTextContainerArray& aTextContainers)
: mAtIntraLevelWhitespace(false)
{
const uint32_t rtcCount = aTextContainers.Length();
mFrames.SetCapacity(rtcCount + 1);
nsIFrame* rbFrame = aBaseContainer->PrincipalChildList().FirstChild();
MOZ_ASSERT(!rbFrame || rbFrame->GetType() == nsGkAtoms::rubyBaseFrame);
mFrames.AppendElement(static_cast<nsRubyContentFrame*>(rbFrame));
for (uint32_t i = 0; i < rtcCount; i++) {
nsRubyTextContainerFrame* container = aTextContainers[i];
// If the container is for span, leave a nullptr here.
// Spans do not take part in pairing.
nsIFrame* rtFrame = !container->IsSpanContainer() ?
container->PrincipalChildList().FirstChild() : nullptr;
MOZ_ASSERT(!rtFrame || rtFrame->GetType() == nsGkAtoms::rubyTextFrame);
mFrames.AppendElement(static_cast<nsRubyContentFrame*>(rtFrame));
}
// We have to init mAtIntraLevelWhitespace to be correct for the
// first column. There are two ways we could end up with intra-level
// whitespace in our first colum:
// 1. The current segment itself is an inter-segment whitespace;
// 2. If our ruby segment is split across multiple lines, and some
// intra-level whitespace happens to fall right after a line-break.
// Each line will get its own nsRubyBaseContainerFrame, and the
// container right after the line-break will end up with its first
// column containing that intra-level whitespace.
for (uint32_t i = 0, iend = mFrames.Length(); i < iend; i++) {
nsRubyContentFrame* frame = mFrames[i];
if (frame && frame->IsIntraLevelWhitespace()) {
mAtIntraLevelWhitespace = true;
break;
}
}
}
void
RubyColumnEnumerator::Next()
{
bool advancingToIntraLevelWhitespace = false;
for (uint32_t i = 0, iend = mFrames.Length(); i < iend; i++) {
nsRubyContentFrame* frame = mFrames[i];
// If we've got intra-level whitespace frames at some levels in the
// current ruby column, we "faked" an anonymous box for all other
// levels for this column. So when we advance off this column, we
// don't advance any of the frames in those levels, because we're
// just advancing across the "fake" frames.
if (frame && (!mAtIntraLevelWhitespace ||
frame->IsIntraLevelWhitespace())) {
nsIFrame* nextSibling = frame->GetNextSibling();
MOZ_ASSERT(!nextSibling || nextSibling->GetType() == frame->GetType(),
"Frame type should be identical among a level");
mFrames[i] = frame = static_cast<nsRubyContentFrame*>(nextSibling);
if (!advancingToIntraLevelWhitespace &&
frame && frame->IsIntraLevelWhitespace()) {
advancingToIntraLevelWhitespace = true;
}
}
}
MOZ_ASSERT(!advancingToIntraLevelWhitespace || !mAtIntraLevelWhitespace,
"Should never have adjacent intra-level whitespace columns");
mAtIntraLevelWhitespace = advancingToIntraLevelWhitespace;
}
bool
RubyColumnEnumerator::AtEnd() const
{
for (uint32_t i = 0, iend = mFrames.Length(); i < iend; i++) {
if (mFrames[i]) {
return false;
}
}
return true;
}
nsRubyContentFrame*
RubyColumnEnumerator::GetFrameAtLevel(uint32_t aIndex) const
{
// If the current ruby column is for intra-level whitespaces, we
// return nullptr for any levels that do not have an actual intra-
// level whitespace frame in this column. This nullptr represents
// an anonymous empty intra-level whitespace box. (In this case,
// it's important that we NOT return mFrames[aIndex], because it's
// really part of the next column, not the current one.)
nsRubyContentFrame* frame = mFrames[aIndex];
return !mAtIntraLevelWhitespace ||
(frame && frame->IsIntraLevelWhitespace()) ? frame : nullptr;
}
void
RubyColumnEnumerator::GetColumn(RubyColumn& aColumn) const
{
nsRubyContentFrame* rbFrame = GetFrameAtLevel(0);
MOZ_ASSERT(!rbFrame || rbFrame->GetType() == nsGkAtoms::rubyBaseFrame);
aColumn.mBaseFrame = static_cast<nsRubyBaseFrame*>(rbFrame);
aColumn.mTextFrames.ClearAndRetainStorage();
for (uint32_t i = 1, iend = mFrames.Length(); i < iend; i++) {
nsRubyContentFrame* rtFrame = GetFrameAtLevel(i);
MOZ_ASSERT(!rtFrame || rtFrame->GetType() == nsGkAtoms::rubyTextFrame);
aColumn.mTextFrames.AppendElement(static_cast<nsRubyTextFrame*>(rtFrame));
}
aColumn.mIsIntraLevelWhitespace = mAtIntraLevelWhitespace;
}
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