gecko-dev/dom/flex/FlexLine.cpp

109 строки
2.6 KiB
C++

/* -*- 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 "FlexLine.h"
#include "FlexItem.h"
#include "mozilla/dom/FlexBinding.h"
#include "nsFlexContainerFrame.h"
namespace mozilla {
namespace dom {
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(FlexLine, mParent, mItems)
NS_IMPL_CYCLE_COLLECTING_ADDREF(FlexLine)
NS_IMPL_CYCLE_COLLECTING_RELEASE(FlexLine)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FlexLine)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
FlexLine::FlexLine(Flex* aParent,
const ComputedFlexLineInfo* aLine)
: mParent(aParent)
{
MOZ_ASSERT(aLine,
"Should never be instantiated with a null ComputedFlexLineInfo.");
// Eagerly copy values from aLine, because we're not
// going to keep it around.
switch (aLine->mGrowthState) {
case ComputedFlexLineInfo::GrowthState::SHRINKING:
mGrowthState = FlexLineGrowthState::Shrinking;
break;
case ComputedFlexLineInfo::GrowthState::GROWING:
mGrowthState = FlexLineGrowthState::Growing;
break;
default:
mGrowthState = FlexLineGrowthState::Unchanged;
};
// Convert all the app unit values into css pixels.
mCrossStart = nsPresContext::AppUnitsToDoubleCSSPixels(
aLine->mCrossStart);
mCrossSize = nsPresContext::AppUnitsToDoubleCSSPixels(
aLine->mCrossSize);
mFirstBaselineOffset = nsPresContext::AppUnitsToDoubleCSSPixels(
aLine->mFirstBaselineOffset);
mLastBaselineOffset = nsPresContext::AppUnitsToDoubleCSSPixels(
aLine->mLastBaselineOffset);
mItems.SetLength(aLine->mItems.Length());
uint32_t index = 0;
for (auto&& i : aLine->mItems) {
FlexItem* item = new FlexItem(this, &i);
mItems.ElementAt(index) = item;
index++;
}
}
JSObject*
FlexLine::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return FlexLine_Binding::Wrap(aCx, this, aGivenProto);
}
FlexLineGrowthState
FlexLine::GrowthState() const
{
return mGrowthState;
}
double
FlexLine::CrossStart() const
{
return mCrossStart;
}
double
FlexLine::CrossSize() const
{
return mCrossSize;
}
double
FlexLine::FirstBaselineOffset() const
{
return mFirstBaselineOffset;
}
double
FlexLine::LastBaselineOffset() const
{
return mLastBaselineOffset;
}
void
FlexLine::GetItems(nsTArray<RefPtr<FlexItem>>& aResult)
{
aResult.AppendElements(mItems);
}
} // namespace dom
} // namespace mozilla