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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code is subject to the terms of the Mozilla Public License
* version 2.0 (the "License"). You can obtain a copy of the License at
* http://mozilla.org/MPL/2.0/. */
/* rendering object for CSS "display: ruby-text-container" */
#include "nsRubyTextContainerFrame.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/WritingModes.h"
#include "nsLineLayout.h"
#include "nsPresContext.h"
#include "nsStyleContext.h"
using namespace mozilla;
//----------------------------------------------------------------------
// Frame class boilerplate
// =======================
NS_QUERYFRAME_HEAD(nsRubyTextContainerFrame)
NS_QUERYFRAME_ENTRY(nsRubyTextContainerFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
NS_IMPL_FRAMEARENA_HELPERS(nsRubyTextContainerFrame)
nsContainerFrame*
NS_NewRubyTextContainerFrame(nsIPresShell* aPresShell,
nsStyleContext* aContext)
{
return new (aPresShell) nsRubyTextContainerFrame(aContext);
}
//----------------------------------------------------------------------
// nsRubyTextContainerFrame Method Implementations
// ===============================================
nsIAtom*
nsRubyTextContainerFrame::GetType() const
{
return nsGkAtoms::rubyTextContainerFrame;
}
#ifdef DEBUG_FRAME_DUMP
nsresult
nsRubyTextContainerFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("RubyTextContainer"), aResult);
}
#endif
/* virtual */ bool
nsRubyTextContainerFrame::IsFrameOfType(uint32_t aFlags) const
{
if (aFlags & eSupportsCSSTransforms) {
return false;
}
return nsContainerFrame::IsFrameOfType(aFlags);
}
/* virtual */ void
nsRubyTextContainerFrame::SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList)
{
nsContainerFrame::SetInitialChildList(aListID, aChildList);
if (aListID == kPrincipalList) {
UpdateSpanFlag();
}
}
/* virtual */ void
nsRubyTextContainerFrame::AppendFrames(ChildListID aListID,
nsFrameList& aFrameList)
{
nsContainerFrame::AppendFrames(aListID, aFrameList);
UpdateSpanFlag();
}
/* virtual */ void
nsRubyTextContainerFrame::InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList)
{
nsContainerFrame::InsertFrames(aListID, aPrevFrame, aFrameList);
UpdateSpanFlag();
}
/* virtual */ void
nsRubyTextContainerFrame::RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame)
{
nsContainerFrame::RemoveFrame(aListID, aOldFrame);
UpdateSpanFlag();
}
void
nsRubyTextContainerFrame::UpdateSpanFlag()
{
bool isSpan = false;
// The continuation checks are safe here because spans never break.
if (!GetPrevContinuation() && !GetNextContinuation()) {
nsIFrame* onlyChild = mFrames.OnlyChild();
if (onlyChild && onlyChild->IsPseudoFrame(GetContent())) {
// Per CSS Ruby spec, if the only child of an rtc frame is
// a pseudo rt frame, it spans all bases in the segment.
isSpan = true;
}
}
if (isSpan) {
AddStateBits(NS_RUBY_TEXT_CONTAINER_IS_SPAN);
} else {
RemoveStateBits(NS_RUBY_TEXT_CONTAINER_IS_SPAN);
}
}
/* virtual */ void
nsRubyTextContainerFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus)
{
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsRubyTextContainerFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
// Although a ruby text container may have continuations, returning
// NS_FRAME_COMPLETE here is still safe, since its parent, ruby frame,
// ignores the status, and continuations of the ruby base container
// will take care of our continuations.
aStatus = NS_FRAME_COMPLETE;
WritingMode lineWM = aReflowInput.mLineLayout->GetWritingMode();
nscoord minBCoord = nscoord_MAX;
nscoord maxBCoord = nscoord_MIN;
// The container size is not yet known, so we use a dummy (0, 0) size.
// The block-dir position will be corrected below after containerSize
// is finalized.
const nsSize dummyContainerSize;
for (nsFrameList::Enumerator e(mFrames); !e.AtEnd(); e.Next()) {
nsIFrame* child = e.get();
MOZ_ASSERT(child->GetType() == nsGkAtoms::rubyTextFrame);
LogicalRect rect = child->GetLogicalRect(lineWM, dummyContainerSize);
LogicalMargin margin = child->GetLogicalUsedMargin(lineWM);
nscoord blockStart = rect.BStart(lineWM) - margin.BStart(lineWM);
minBCoord = std::min(minBCoord, blockStart);
nscoord blockEnd = rect.BEnd(lineWM) + margin.BEnd(lineWM);
maxBCoord = std::max(maxBCoord, blockEnd);
}
LogicalSize size(lineWM, mISize, 0);
if (!mFrames.IsEmpty()) {
if (MOZ_UNLIKELY(minBCoord > maxBCoord)) {
// XXX When bug 765861 gets fixed, this warning should be upgraded.
NS_WARNING("bad block coord");
minBCoord = maxBCoord = 0;
}
size.BSize(lineWM) = maxBCoord - minBCoord;
nsSize containerSize = size.GetPhysicalSize(lineWM);
for (nsFrameList::Enumerator e(mFrames); !e.AtEnd(); e.Next()) {
nsIFrame* child = e.get();
// We reflowed the child with a dummy container size, as the true size
// was not yet known at that time.
LogicalPoint pos = child->GetLogicalPosition(lineWM, dummyContainerSize);
// Adjust block position to account for minBCoord,
// then reposition child based on the true container width.
pos.B(lineWM) -= minBCoord;
// Relative positioning hasn't happened yet.
// So MovePositionBy should not be used here.
child->SetPosition(lineWM, pos, containerSize);
nsContainerFrame::PlaceFrameView(child);
}
}
aDesiredSize.SetSize(lineWM, size);
}
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