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fccedb8262
Previously we were just directly converting this nscoord sentinel-value representation (NS_UNCONSTRAINEDSIZE) into CSS pixels and producing a particular bogus number of pixels. Differential Revision: https://phabricator.services.mozilla.com/D2432 --HG-- extra : moz-landing-system : lando
115 lines
2.8 KiB
C++
115 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "FlexItem.h"
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#include "mozilla/dom/FlexBinding.h"
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#include "nsFlexContainerFrame.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(FlexItem, mParent)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(FlexItem)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(FlexItem)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FlexItem)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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/**
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* Utility function to convert a nscoord size to CSS pixel values, with
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* graceful treatment of NS_UNCONSTRAINEDSIZE (which this function converts to
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* the double "positive infinity" value).
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*
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* This function is suitable for converting quantities that are expected to
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* sometimes legitimately (rather than arbitrarily/accidentally) contain the
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* sentinel value NS_UNCONSTRAINEDSIZE -- e.g. to handle "max-width: none".
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*/
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static double
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ToPossiblyUnconstrainedPixels(nscoord aSize)
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{
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if (aSize == NS_UNCONSTRAINEDSIZE) {
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return std::numeric_limits<double>::infinity();
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}
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return nsPresContext::AppUnitsToDoubleCSSPixels(aSize);
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}
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FlexItem::FlexItem(FlexLine* aParent,
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const ComputedFlexItemInfo* aItem)
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: mParent(aParent)
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{
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MOZ_ASSERT(aItem,
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"Should never be instantiated with a null ComputedFlexLineInfo.");
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// Eagerly copy values from aItem, because we're not
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// going to keep it around.
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mNode = aItem->mNode;
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// Convert app unit sizes to css pixel sizes.
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mMainBaseSize = nsPresContext::AppUnitsToDoubleCSSPixels(
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aItem->mMainBaseSize);
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mMainDeltaSize = nsPresContext::AppUnitsToDoubleCSSPixels(
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aItem->mMainDeltaSize);
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mMainMinSize = nsPresContext::AppUnitsToDoubleCSSPixels(
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aItem->mMainMinSize);
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mMainMaxSize = ToPossiblyUnconstrainedPixels(aItem->mMainMaxSize);
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mCrossMinSize = nsPresContext::AppUnitsToDoubleCSSPixels(
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aItem->mCrossMinSize);
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mCrossMaxSize = ToPossiblyUnconstrainedPixels(aItem->mCrossMaxSize);
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}
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JSObject*
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FlexItem::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return FlexItem_Binding::Wrap(aCx, this, aGivenProto);
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}
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nsINode*
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FlexItem::GetNode() const
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{
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return mNode;
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}
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double
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FlexItem::MainBaseSize() const
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{
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return mMainBaseSize;
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}
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double
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FlexItem::MainDeltaSize() const
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{
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return mMainDeltaSize;
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}
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double
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FlexItem::MainMinSize() const
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{
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return mMainMinSize;
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}
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double
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FlexItem::MainMaxSize() const
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{
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return mMainMaxSize;
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}
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double
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FlexItem::CrossMinSize() const
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{
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return mCrossMinSize;
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}
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double
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FlexItem::CrossMaxSize() const
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{
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return mCrossMaxSize;
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}
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} // namespace dom
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} // namespace mozilla
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