98 lines
3.5 KiB
C++
98 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* 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/. */
|
|
|
|
#ifndef NS_ISMILATTR_H_
|
|
#define NS_ISMILATTR_H_
|
|
|
|
#include "nscore.h"
|
|
|
|
class nsSMILValue;
|
|
class nsIContent;
|
|
class nsAString;
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
class SVGAnimationElement;
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// nsISMILAttr: A variable targeted by SMIL for animation and can therefore have
|
|
// an underlying (base) value and an animated value For example, an attribute of
|
|
// a particular SVG element.
|
|
//
|
|
// These objects only exist during the compositing phase of SMIL animation
|
|
// calculations. They have a single owner who is responsible for deleting the
|
|
// object.
|
|
|
|
class nsISMILAttr
|
|
{
|
|
public:
|
|
/**
|
|
* Creates a new nsSMILValue for this attribute from a string. The string is
|
|
* parsed in the context of this attribute so that context-dependent values
|
|
* such as em-based units can be resolved into a canonical form suitable for
|
|
* animation (including interpolation etc.).
|
|
*
|
|
* @param aStr A string defining the new value to be created.
|
|
* @param aSrcElement The source animation element. This may be needed to
|
|
* provided additional context data such as for
|
|
* animateTransform where the 'type' attribute is needed to
|
|
* parse the value.
|
|
* @param[out] aValue Outparam for storing the parsed value.
|
|
* @param[out] aPreventCachingOfSandwich
|
|
* Outparam to indicate whether the attribute contains
|
|
* dependencies on its context that should prevent the
|
|
* result of the animation sandwich from being cached and
|
|
* reused in future samples.
|
|
* @return NS_OK on success or an error code if creation failed.
|
|
*/
|
|
virtual nsresult ValueFromString(const nsAString& aStr,
|
|
const mozilla::dom::SVGAnimationElement* aSrcElement,
|
|
nsSMILValue& aValue,
|
|
bool& aPreventCachingOfSandwich) const = 0;
|
|
|
|
/**
|
|
* Gets the underlying value of this attribute.
|
|
*
|
|
* @return an nsSMILValue object. returned_object.IsNull() will be true if an
|
|
* error occurred.
|
|
*/
|
|
virtual nsSMILValue GetBaseValue() const = 0;
|
|
|
|
/**
|
|
* Clears the animated value of this attribute.
|
|
*
|
|
* NOTE: The animation target is not guaranteed to be in a document when this
|
|
* method is called. (See bug 523188)
|
|
*/
|
|
virtual void ClearAnimValue() = 0;
|
|
|
|
/**
|
|
* Sets the presentation value of this attribute.
|
|
*
|
|
* @param aValue The value to set.
|
|
* @return NS_OK on success or an error code if setting failed.
|
|
*/
|
|
virtual nsresult SetAnimValue(const nsSMILValue& aValue) = 0;
|
|
|
|
/**
|
|
* Returns the targeted content node, for any nsISMILAttr implementations
|
|
* that want to expose that to the animation logic. Otherwise, returns
|
|
* null.
|
|
*
|
|
* @return the targeted content node, if this nsISMILAttr implementation
|
|
* wishes to make it avaiable. Otherwise, nullptr.
|
|
*/
|
|
virtual const nsIContent* GetTargetNode() const { return nullptr; }
|
|
|
|
/**
|
|
* Virtual destructor, to make sure subclasses can clean themselves up.
|
|
*/
|
|
virtual ~nsISMILAttr() {}
|
|
};
|
|
|
|
#endif // NS_ISMILATTR_H_
|