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9c4b9bb36d
Use edge-inclusive intersection like IntersectionObserver, to make zero-size iframes that are in the viewport considered visible. This is consistent with how we treat zero-sized in-process iframes. Differential Revision: https://phabricator.services.mozilla.com/D185808
68 lines
2.4 KiB
C++
68 lines
2.4 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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#ifndef mozilla_dom_EffectsInfo_h
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#define mozilla_dom_EffectsInfo_h
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#include "nsRect.h"
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#include "Units.h"
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namespace mozilla::dom {
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/**
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* An EffectsInfo contains information for a remote browser about the graphical
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* effects that are being applied to it by ancestor browsers in different
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* processes.
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*/
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class EffectsInfo {
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public:
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EffectsInfo() = default;
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static EffectsInfo VisibleWithinRect(
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const Maybe<nsRect>& aVisibleRect, const Scale2D& aRasterScale,
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const ParentLayerToScreenScale2D& aTransformToAncestorScale) {
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return EffectsInfo{aVisibleRect, aRasterScale, aTransformToAncestorScale};
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}
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static EffectsInfo FullyHidden() { return {}; }
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bool operator==(const EffectsInfo& aOther) const {
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return mVisibleRect == aOther.mVisibleRect &&
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mRasterScale == aOther.mRasterScale &&
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mTransformToAncestorScale == aOther.mTransformToAncestorScale;
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}
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bool operator!=(const EffectsInfo& aOther) const {
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return !(*this == aOther);
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}
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bool IsVisible() const { return mVisibleRect.isSome(); }
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// The visible rect of this browser relative to the root frame. This might be
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// empty in cases where we might still be considered visible, like if we're
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// zero-size but inside the viewport.
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Maybe<nsRect> mVisibleRect;
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// The desired scale factors to apply to rasterized content to match
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// transforms applied in ancestor browsers. This gets propagated into the
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// scale in StackingContextHelper.
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Scale2D mRasterScale;
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// TransformToAncestorScale to be set on FrameMetrics. It includes CSS
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// transform scales and cumulative presshell resolution.
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ParentLayerToScreenScale2D mTransformToAncestorScale;
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// If you add new fields here, you must also update operator== and
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// TabMessageUtils.
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private:
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EffectsInfo(const Maybe<nsRect>& aVisibleRect, const Scale2D& aRasterScale,
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const ParentLayerToScreenScale2D& aTransformToAncestorScale)
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: mVisibleRect(aVisibleRect),
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mRasterScale(aRasterScale),
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mTransformToAncestorScale(aTransformToAncestorScale) {}
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};
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} // namespace mozilla::dom
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#endif // mozilla_dom_EffectsInfo_h
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