mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-07-11 22:29:44 +00:00
132 lines
5.0 KiB
C++
132 lines
5.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* 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 SVGTRANSFORMLISTSMILTYPE_H_
|
|
#define SVGTRANSFORMLISTSMILTYPE_H_
|
|
|
|
#include "mozilla/Attributes.h"
|
|
#include "nsISMILType.h"
|
|
#include "nsTArray.h"
|
|
|
|
class nsSMILValue;
|
|
|
|
namespace mozilla {
|
|
|
|
class nsSVGTransform;
|
|
class SVGTransformList;
|
|
class SVGTransformSMILData;
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// SVGTransformListSMILType
|
|
//
|
|
// Operations for animating an nsSVGTransformList.
|
|
//
|
|
// This class is confused somewhat by the fact that:
|
|
// (i) An <animateTransform> element animates an SVGTransformList
|
|
// (ii) BUT <animateTransform> only allows the user to specify animation values
|
|
// for an nsSVGTransform
|
|
//
|
|
// This may be rectified in a future edition of SVG but for now it means that
|
|
// the underlying value of an animation may be something of the form:
|
|
//
|
|
// rotate(90) scale(2) skewX(50)
|
|
//
|
|
// BUT the animation values can only ever be SINGLE transform operations such as
|
|
//
|
|
// rotate(90)
|
|
//
|
|
// (actually the syntax here is:
|
|
// <animateTransform type="rotate" from="0" to="90"...
|
|
// OR maybe
|
|
// <animateTransform type="rotate" values="0; 90; 30; 50"...
|
|
// OR even (with a rotation centre)
|
|
// <animateTransform type="rotate" values="0 50 20; 30 50 20; 70 0 0"...)
|
|
//
|
|
// This has many implications for the number of elements we expect in the
|
|
// transform array supplied for each operation.
|
|
//
|
|
// For example, Add() only ever operates on the values specified on an
|
|
// <animateTransform> element and so these values can only ever contain 0 or
|
|
// 1 TRANSFORM elements as the syntax doesn't allow more. (A "value" here is
|
|
// a single element in the values array such as "0 50 20" above.)
|
|
//
|
|
// Likewise ComputeDistance() only ever operates within the values specified on
|
|
// an <animateTransform> element so similar conditions hold.
|
|
//
|
|
// However, SandwichAdd() combines with a base value which may contain 0..n
|
|
// transforms either because the base value of the attribute specifies a series
|
|
// of transforms, e.g.
|
|
//
|
|
// <circle transform="translate(30) rotate(50)"... >
|
|
// <animateTransform.../>
|
|
// </circle>
|
|
//
|
|
// or because several animations target the same attribute and are additive and
|
|
// so are simply appended on to the transformation array, e.g.
|
|
//
|
|
// <circle transform="translate(30)"... >
|
|
// <animateTransform type="rotate" additive="sum".../>
|
|
// <animateTransform type="scale" additive="sum".../>
|
|
// <animateTransform type="skewX" additive="sum".../>
|
|
// </circle>
|
|
//
|
|
// Similar conditions hold for Interpolate() which in cases such as to-animation
|
|
// may have use a start-value the base value of the target attribute (which as
|
|
// we have seen above can contain 0..n elements) whilst the end-value comes from
|
|
// the <animateTransform> and so can only hold 1 transform.
|
|
//
|
|
class SVGTransformListSMILType : public nsISMILType
|
|
{
|
|
public:
|
|
// Singleton for nsSMILValue objects to hold onto.
|
|
static SVGTransformListSMILType*
|
|
Singleton()
|
|
{
|
|
static SVGTransformListSMILType sSingleton;
|
|
return &sSingleton;
|
|
}
|
|
|
|
protected:
|
|
// nsISMILType Methods
|
|
// -------------------
|
|
virtual void Init(nsSMILValue& aValue) const override;
|
|
virtual void Destroy(nsSMILValue& aValue) const override;
|
|
virtual nsresult Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const override;
|
|
virtual bool IsEqual(const nsSMILValue& aLeft,
|
|
const nsSMILValue& aRight) const override;
|
|
virtual nsresult Add(nsSMILValue& aDest,
|
|
const nsSMILValue& aValueToAdd,
|
|
uint32_t aCount) const override;
|
|
virtual nsresult SandwichAdd(nsSMILValue& aDest,
|
|
const nsSMILValue& aValueToAdd) const override;
|
|
virtual nsresult ComputeDistance(const nsSMILValue& aFrom,
|
|
const nsSMILValue& aTo,
|
|
double& aDistance) const override;
|
|
virtual nsresult Interpolate(const nsSMILValue& aStartVal,
|
|
const nsSMILValue& aEndVal,
|
|
double aUnitDistance,
|
|
nsSMILValue& aResult) const override;
|
|
|
|
public:
|
|
// Transform array accessors
|
|
// -------------------------
|
|
static nsresult AppendTransform(const SVGTransformSMILData& aTransform,
|
|
nsSMILValue& aValue);
|
|
static bool AppendTransforms(const SVGTransformList& aList,
|
|
nsSMILValue& aValue);
|
|
static bool GetTransforms(const nsSMILValue& aValue,
|
|
FallibleTArray<nsSVGTransform>& aTransforms);
|
|
|
|
|
|
private:
|
|
// Private constructor: prevent instances beyond my singleton.
|
|
MOZ_CONSTEXPR SVGTransformListSMILType() {}
|
|
};
|
|
|
|
} // end namespace mozilla
|
|
|
|
#endif // SVGLISTTRANSFORMSMILTYPE_H_
|