зеркало из https://github.com/mozilla/gecko-dev.git
105 строки
3.4 KiB
C++
105 строки
3.4 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_Keyframe_h
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#define mozilla_dom_Keyframe_h
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#include "nsCSSPropertyID.h"
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#include "nsCSSValue.h"
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#include "nsTArray.h"
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#include "mozilla/ComputedTimingFunction.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/RefPtr.h"
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struct RawServoDeclarationBlock;
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namespace mozilla {
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namespace dom {
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enum class CompositeOperation : uint8_t;
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}
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/**
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* A property-value pair specified on a keyframe.
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*/
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struct PropertyValuePair
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{
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explicit PropertyValuePair(nsCSSPropertyID aProperty)
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: mProperty(aProperty) { }
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PropertyValuePair(nsCSSPropertyID aProperty, nsCSSValue&& aValue)
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: mProperty(aProperty), mValue(Move(aValue)) { }
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PropertyValuePair(nsCSSPropertyID aProperty,
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RefPtr<RawServoDeclarationBlock>&& aValue)
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: mProperty(aProperty), mServoDeclarationBlock(Move(aValue))
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{
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MOZ_ASSERT(mServoDeclarationBlock, "Should be valid property value");
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}
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nsCSSPropertyID mProperty;
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// The specified value for the property. For shorthand property values,
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// we store the specified property value as a token stream (string).
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// If this is uninitialized, we use the underlying value.
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nsCSSValue mValue;
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// The specified value when using the Servo backend.
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RefPtr<RawServoDeclarationBlock> mServoDeclarationBlock;
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#ifdef DEBUG
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// Flag to indicate that when we call StyleAnimationValue::ComputeValues on
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// this value we should behave as if that function had failed.
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bool mSimulateComputeValuesFailure = false;
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#endif
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bool operator==(const PropertyValuePair&) const;
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};
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/**
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* A single keyframe.
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*
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* This is the canonical form in which keyframe effects are stored and
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* corresponds closely to the type of objects returned via the getKeyframes()
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* API.
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*
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* Before computing an output animation value, however, we flatten these frames
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* down to a series of per-property value arrays where we also resolve any
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* overlapping shorthands/longhands, convert specified CSS values to computed
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* values, etc.
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*
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* When the target element or style context changes, however, we rebuild these
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* per-property arrays from the original list of keyframes objects. As a result,
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* these objects represent the master definition of the effect's values.
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*/
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struct Keyframe
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{
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Keyframe() = default;
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Keyframe(const Keyframe& aOther) = default;
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Keyframe(Keyframe&& aOther)
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{
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*this = Move(aOther);
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}
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Keyframe& operator=(const Keyframe& aOther) = default;
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Keyframe& operator=(Keyframe&& aOther)
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{
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mOffset = aOther.mOffset;
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mComputedOffset = aOther.mComputedOffset;
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mTimingFunction = Move(aOther.mTimingFunction);
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mComposite = Move(aOther.mComposite);
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mPropertyValues = Move(aOther.mPropertyValues);
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return *this;
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}
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Maybe<double> mOffset;
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static constexpr double kComputedOffsetNotSet = -1.0;
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double mComputedOffset = kComputedOffsetNotSet;
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Maybe<ComputedTimingFunction> mTimingFunction; // Nothing() here means
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// "linear"
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Maybe<dom::CompositeOperation> mComposite;
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nsTArray<PropertyValuePair> mPropertyValues;
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};
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}
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#endif // mozilla_dom_Keyframe_h
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