Bug 1141931 part 6 - Move Ruby{Segment,Column}Enumerator to RubyUtils. r=dholbert

--HG--
extra : source : 2327584c7a0740617388bc544d2bb8433d034fe7
This commit is contained in:
Xidorn Quan 2015-04-08 11:22:34 +12:00
parent ddd0a788fa
commit 966ef97045
5 changed files with 198 additions and 192 deletions

View File

@ -5,6 +5,9 @@
* 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"
using namespace mozilla;
@ -59,3 +62,129 @@ RubyTextContainerIterator::Next()
mFrame = nullptr;
}
}
RubySegmentEnumerator::RubySegmentEnumerator(nsRubyFrame* aRubyFrame)
{
nsIFrame* frame = aRubyFrame->GetFirstPrincipalChild();
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 nsTArray<nsRubyTextContainerFrame*>& aTextContainers)
: mAtIntraLevelWhitespace(false)
{
const uint32_t rtcCount = aTextContainers.Length();
mFrames.SetCapacity(rtcCount + 1);
nsIFrame* rbFrame = aBaseContainer->GetFirstPrincipalChild();
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->GetFirstPrincipalChild() : 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;
}

View File

@ -7,9 +7,16 @@
#ifndef mozilla_RubyUtils_h_
#define mozilla_RubyUtils_h_
#include "nsTArray.h"
#include "nsGkAtoms.h"
#include "nsRubyTextContainerFrame.h"
#define RTC_ARRAY_SIZE 1
class nsRubyFrame;
class nsRubyBaseFrame;
class nsRubyTextFrame;
class nsRubyContentFrame;
class nsRubyBaseContainerFrame;
namespace mozilla {
@ -80,6 +87,64 @@ private:
nsIFrame* mFrame;
};
/**
* This enumerator enumerates each ruby segment.
*/
class MOZ_STACK_CLASS RubySegmentEnumerator
{
public:
explicit RubySegmentEnumerator(nsRubyFrame* aRubyFrame);
void Next();
bool AtEnd() const { return !mBaseContainer; }
nsRubyBaseContainerFrame* GetBaseContainer() const
{
return mBaseContainer;
}
private:
nsRubyBaseContainerFrame* mBaseContainer;
};
/**
* Ruby column is a unit consists of one ruby base and all ruby
* annotations paired with it.
* See http://dev.w3.org/csswg/css-ruby/#ruby-pairing
*/
struct MOZ_STACK_CLASS RubyColumn
{
nsRubyBaseFrame* mBaseFrame;
nsAutoTArray<nsRubyTextFrame*, RTC_ARRAY_SIZE> mTextFrames;
bool mIsIntraLevelWhitespace;
RubyColumn() : mBaseFrame(nullptr), mIsIntraLevelWhitespace(false) { }
};
/**
* This enumerator enumerates ruby columns in a segment.
*/
class MOZ_STACK_CLASS RubyColumnEnumerator
{
public:
RubyColumnEnumerator(nsRubyBaseContainerFrame* aRBCFrame,
const nsTArray<nsRubyTextContainerFrame*>& aRTCFrames);
void Next();
bool AtEnd() const;
uint32_t GetLevelCount() const { return mFrames.Length(); }
nsRubyContentFrame* GetFrameAtLevel(uint32_t aIndex) const;
void GetColumn(RubyColumn& aColumn) const;
private:
// Frames in this array are NOT necessary part of the current column.
// When in doubt, use GetFrameAtLevel to access it.
// See GetFrameAtLevel() and Next() for more info.
nsAutoTArray<nsRubyContentFrame*, RTC_ARRAY_SIZE + 1> mFrames;
// Whether we are on a column for intra-level whitespaces
bool mAtIntraLevelWhitespace;
};
}
#endif /* !defined(mozilla_RubyUtils_h_) */

View File

@ -61,148 +61,6 @@ nsRubyBaseContainerFrame::GetFrameName(nsAString& aResult) const
}
#endif
/**
* Ruby column is a unit consists of one ruby base and all ruby
* annotations paired with it.
* See http://dev.w3.org/csswg/css-ruby/#ruby-pairing
*/
struct MOZ_STACK_CLASS mozilla::RubyColumn
{
nsRubyBaseFrame* mBaseFrame;
nsAutoTArray<nsRubyTextFrame*, RTC_ARRAY_SIZE> mTextFrames;
bool mIsIntraLevelWhitespace;
RubyColumn() : mBaseFrame(nullptr), mIsIntraLevelWhitespace(false) { }
};
class MOZ_STACK_CLASS RubyColumnEnumerator
{
public:
RubyColumnEnumerator(nsRubyBaseContainerFrame* aRBCFrame,
const nsTArray<nsRubyTextContainerFrame*>& aRTCFrames);
void Next();
bool AtEnd() const;
uint32_t GetLevelCount() const { return mFrames.Length(); }
nsRubyContentFrame* GetFrameAtLevel(uint32_t aIndex) const;
void GetColumn(RubyColumn& aColumn) const;
private:
// Frames in this array are NOT necessary part of the current column.
// When in doubt, use GetFrameAtLevel to access it.
// See GetFrameAtLevel() and Next() for more info.
nsAutoTArray<nsRubyContentFrame*, RTC_ARRAY_SIZE + 1> mFrames;
// Whether we are on a column for intra-level whitespaces
bool mAtIntraLevelWhitespace;
};
RubyColumnEnumerator::RubyColumnEnumerator(
nsRubyBaseContainerFrame* aBaseContainer,
const nsTArray<nsRubyTextContainerFrame*>& aTextContainers)
: mAtIntraLevelWhitespace(false)
{
const uint32_t rtcCount = aTextContainers.Length();
mFrames.SetCapacity(rtcCount + 1);
nsIFrame* rbFrame = aBaseContainer->GetFirstPrincipalChild();
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->GetFirstPrincipalChild() : 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;
}
static gfxBreakPriority
LineBreakBefore(nsIFrame* aFrame,
nsRenderingContext* aRenderingContext,

View File

@ -9,10 +9,9 @@
#ifndef nsRubyBaseContainerFrame_h___
#define nsRubyBaseContainerFrame_h___
#include "RubyUtils.h"
#include "nsContainerFrame.h"
#define RTC_ARRAY_SIZE 1
/**
* Factory function.
* @return a newly allocated nsRubyBaseContainerFrame (infallible)
@ -20,12 +19,6 @@
nsContainerFrame* NS_NewRubyBaseContainerFrame(nsIPresShell* aPresShell,
nsStyleContext* aContext);
namespace mozilla {
struct RubyColumn;
}
class nsRubyTextContainerFrame;
class nsRubyBaseContainerFrame final : public nsContainerFrame
{
public:

View File

@ -65,51 +65,12 @@ nsRubyFrame::GetFrameName(nsAString& aResult) const
}
#endif
/**
* This enumerator enumerates each segment.
*/
class MOZ_STACK_CLASS SegmentEnumerator
{
public:
explicit SegmentEnumerator(nsRubyFrame* aRubyFrame);
void Next();
bool AtEnd() const { return !mBaseContainer; }
nsRubyBaseContainerFrame* GetBaseContainer() const
{
return mBaseContainer;
}
private:
nsRubyBaseContainerFrame* mBaseContainer;
};
SegmentEnumerator::SegmentEnumerator(nsRubyFrame* aRubyFrame)
{
nsIFrame* frame = aRubyFrame->GetFirstPrincipalChild();
MOZ_ASSERT(!frame ||
frame->GetType() == nsGkAtoms::rubyBaseContainerFrame);
mBaseContainer = static_cast<nsRubyBaseContainerFrame*>(frame);
}
void
SegmentEnumerator::Next()
{
MOZ_ASSERT(mBaseContainer);
nsIFrame* frame = mBaseContainer->GetNextSibling();
while (frame && frame->GetType() != nsGkAtoms::rubyBaseContainerFrame) {
frame = frame->GetNextSibling();
}
mBaseContainer = static_cast<nsRubyBaseContainerFrame*>(frame);
}
/* virtual */ void
nsRubyFrame::AddInlineMinISize(nsRenderingContext *aRenderingContext,
nsIFrame::InlineMinISizeData *aData)
{
for (nsIFrame* frame = this; frame; frame = frame->GetNextInFlow()) {
for (SegmentEnumerator e(static_cast<nsRubyFrame*>(frame));
for (RubySegmentEnumerator e(static_cast<nsRubyFrame*>(frame));
!e.AtEnd(); e.Next()) {
e.GetBaseContainer()->AddInlineMinISize(aRenderingContext, aData);
}
@ -121,7 +82,7 @@ nsRubyFrame::AddInlinePrefISize(nsRenderingContext *aRenderingContext,
nsIFrame::InlinePrefISizeData *aData)
{
for (nsIFrame* frame = this; frame; frame = frame->GetNextInFlow()) {
for (SegmentEnumerator e(static_cast<nsRubyFrame*>(frame));
for (RubySegmentEnumerator e(static_cast<nsRubyFrame*>(frame));
!e.AtEnd(); e.Next()) {
e.GetBaseContainer()->AddInlinePrefISize(aRenderingContext, aData);
}
@ -169,7 +130,7 @@ nsRubyFrame::Reflow(nsPresContext* aPresContext,
startEdge, availableISize, &mBaseline);
aStatus = NS_FRAME_COMPLETE;
for (SegmentEnumerator e(this); !e.AtEnd(); e.Next()) {
for (RubySegmentEnumerator e(this); !e.AtEnd(); e.Next()) {
ReflowSegment(aPresContext, aReflowState, e.GetBaseContainer(), aStatus);
if (NS_INLINE_IS_BREAK(aStatus)) {