зеркало из https://github.com/mozilla/gecko-dev.git
97 строки
3.6 KiB
C++
97 строки
3.6 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 "FlexItemValues.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(FlexItemValues, mParent, mNode,
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mFrameRect)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(FlexItemValues)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(FlexItemValues)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FlexItemValues)
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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 ToPossiblyUnconstrainedPixels(nscoord aSize) {
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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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FlexItemValues::FlexItemValues(FlexLineValues* aParent,
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const ComputedFlexItemInfo* aItem)
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: mParent(aParent) {
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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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// Since mNode might be null, we associate the mFrameRect with
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// our parent.
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mFrameRect = new DOMRectReadOnly(
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mParent, nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mFrameRect.X()),
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nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mFrameRect.Y()),
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nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mFrameRect.Width()),
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nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mFrameRect.Height()));
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// Convert app unit sizes to css pixel sizes.
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mMainBaseSize =
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nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mMainBaseSize);
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mMainDeltaSize =
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nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mMainDeltaSize);
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mMainMinSize = nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mMainMinSize);
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mMainMaxSize = ToPossiblyUnconstrainedPixels(aItem->mMainMaxSize);
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mCrossMinSize =
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nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mCrossMinSize);
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mCrossMaxSize = ToPossiblyUnconstrainedPixels(aItem->mCrossMaxSize);
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mClampState = aItem->mClampState;
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}
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JSObject* FlexItemValues::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return FlexItemValues_Binding::Wrap(aCx, this, aGivenProto);
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}
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nsINode* FlexItemValues::GetNode() const { return mNode; }
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DOMRectReadOnly* FlexItemValues::FrameRect() const { return mFrameRect; }
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double FlexItemValues::MainBaseSize() const { return mMainBaseSize; }
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double FlexItemValues::MainDeltaSize() const { return mMainDeltaSize; }
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double FlexItemValues::MainMinSize() const { return mMainMinSize; }
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double FlexItemValues::MainMaxSize() const { return mMainMaxSize; }
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double FlexItemValues::CrossMinSize() const { return mCrossMinSize; }
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double FlexItemValues::CrossMaxSize() const { return mCrossMaxSize; }
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FlexItemClampState FlexItemValues::ClampState() const { return mClampState; }
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} // namespace dom
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} // namespace mozilla
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