mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-06 00:55:37 +00:00
146 lines
3.6 KiB
C++
146 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; 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/. */
|
|
|
|
#include "nsSMILValue.h"
|
|
#include "nsDebug.h"
|
|
#include <string.h>
|
|
|
|
//----------------------------------------------------------------------
|
|
// Public methods
|
|
|
|
nsSMILValue::nsSMILValue(const nsISMILType* aType)
|
|
: mType(nsSMILNullType::Singleton())
|
|
{
|
|
if (!aType) {
|
|
NS_ERROR("Trying to construct nsSMILValue with null mType pointer");
|
|
return;
|
|
}
|
|
|
|
InitAndCheckPostcondition(aType);
|
|
}
|
|
|
|
nsSMILValue::nsSMILValue(const nsSMILValue& aVal)
|
|
: mType(nsSMILNullType::Singleton())
|
|
{
|
|
InitAndCheckPostcondition(aVal.mType);
|
|
mType->Assign(*this, aVal);
|
|
}
|
|
|
|
const nsSMILValue&
|
|
nsSMILValue::operator=(const nsSMILValue& aVal)
|
|
{
|
|
if (&aVal == this)
|
|
return *this;
|
|
|
|
if (mType != aVal.mType) {
|
|
DestroyAndReinit(aVal.mType);
|
|
}
|
|
|
|
mType->Assign(*this, aVal);
|
|
|
|
return *this;
|
|
}
|
|
|
|
bool
|
|
nsSMILValue::operator==(const nsSMILValue& aVal) const
|
|
{
|
|
if (&aVal == this)
|
|
return true;
|
|
|
|
return mType == aVal.mType && mType->IsEqual(*this, aVal);
|
|
}
|
|
|
|
void
|
|
nsSMILValue::Swap(nsSMILValue& aOther)
|
|
{
|
|
nsSMILValue tmp;
|
|
memcpy(&tmp, &aOther, sizeof(nsSMILValue)); // tmp = aOther
|
|
memcpy(&aOther, this, sizeof(nsSMILValue)); // aOther = this
|
|
memcpy(this, &tmp, sizeof(nsSMILValue)); // this = tmp
|
|
|
|
// |tmp| is about to die -- we need to clear its mType, so that its
|
|
// destructor doesn't muck with the data we just transferred out of it.
|
|
tmp.mType = nsSMILNullType::Singleton();
|
|
}
|
|
|
|
nsresult
|
|
nsSMILValue::Add(const nsSMILValue& aValueToAdd, uint32_t aCount)
|
|
{
|
|
if (aValueToAdd.mType != mType) {
|
|
NS_ERROR("Trying to add incompatible types");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
return mType->Add(*this, aValueToAdd, aCount);
|
|
}
|
|
|
|
nsresult
|
|
nsSMILValue::SandwichAdd(const nsSMILValue& aValueToAdd)
|
|
{
|
|
if (aValueToAdd.mType != mType) {
|
|
NS_ERROR("Trying to add incompatible types");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
return mType->SandwichAdd(*this, aValueToAdd);
|
|
}
|
|
|
|
nsresult
|
|
nsSMILValue::ComputeDistance(const nsSMILValue& aTo, double& aDistance) const
|
|
{
|
|
if (aTo.mType != mType) {
|
|
NS_ERROR("Trying to calculate distance between incompatible types");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
return mType->ComputeDistance(*this, aTo, aDistance);
|
|
}
|
|
|
|
nsresult
|
|
nsSMILValue::Interpolate(const nsSMILValue& aEndVal,
|
|
double aUnitDistance,
|
|
nsSMILValue& aResult) const
|
|
{
|
|
if (aEndVal.mType != mType) {
|
|
NS_ERROR("Trying to interpolate between incompatible types");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (aResult.mType != mType) {
|
|
// Outparam has wrong type
|
|
aResult.DestroyAndReinit(mType);
|
|
}
|
|
|
|
return mType->Interpolate(*this, aEndVal, aUnitDistance, aResult);
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Helper methods
|
|
|
|
// Wrappers for nsISMILType::Init & ::Destroy that verify their postconditions
|
|
void
|
|
nsSMILValue::InitAndCheckPostcondition(const nsISMILType* aNewType)
|
|
{
|
|
aNewType->Init(*this);
|
|
MOZ_ASSERT(mType == aNewType,
|
|
"Post-condition of Init failed. nsSMILValue is invalid");
|
|
}
|
|
|
|
void
|
|
nsSMILValue::DestroyAndCheckPostcondition()
|
|
{
|
|
mType->Destroy(*this);
|
|
MOZ_ASSERT(IsNull(),
|
|
"Post-condition of Destroy failed. "
|
|
"nsSMILValue not null after destroying");
|
|
}
|
|
|
|
void
|
|
nsSMILValue::DestroyAndReinit(const nsISMILType* aNewType)
|
|
{
|
|
DestroyAndCheckPostcondition();
|
|
InitAndCheckPostcondition(aNewType);
|
|
}
|