gecko/layout/style/AnimationCommon.cpp
2012-05-21 12:12:37 +01:00

218 lines
6.0 KiB
C++

/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
/* 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 "AnimationCommon.h"
#include "nsRuleData.h"
#include "nsCSSValue.h"
#include "nsStyleContext.h"
namespace mozilla {
namespace css {
CommonAnimationManager::CommonAnimationManager(nsPresContext *aPresContext)
: mPresContext(aPresContext)
{
PR_INIT_CLIST(&mElementData);
}
CommonAnimationManager::~CommonAnimationManager()
{
NS_ABORT_IF_FALSE(!mPresContext, "Disconnect should have been called");
}
void
CommonAnimationManager::Disconnect()
{
// Content nodes might outlive the transition or animation manager.
RemoveAllElementData();
mPresContext = nsnull;
}
void
CommonAnimationManager::AddElementData(CommonElementAnimationData* aData)
{
if (PR_CLIST_IS_EMPTY(&mElementData)) {
// We need to observe the refresh driver.
nsRefreshDriver *rd = mPresContext->RefreshDriver();
rd->AddRefreshObserver(this, Flush_Style);
}
PR_INSERT_BEFORE(aData, &mElementData);
}
void
CommonAnimationManager::ElementDataRemoved()
{
// If we have no transitions or animations left, remove ourselves from
// the refresh driver.
if (PR_CLIST_IS_EMPTY(&mElementData)) {
mPresContext->RefreshDriver()->RemoveRefreshObserver(this, Flush_Style);
}
}
void
CommonAnimationManager::RemoveAllElementData()
{
while (!PR_CLIST_IS_EMPTY(&mElementData)) {
CommonElementAnimationData *head =
static_cast<CommonElementAnimationData*>(PR_LIST_HEAD(&mElementData));
head->Destroy();
}
}
/*
* nsISupports implementation
*/
NS_IMPL_ISUPPORTS1(CommonAnimationManager, nsIStyleRuleProcessor)
nsRestyleHint
CommonAnimationManager::HasStateDependentStyle(StateRuleProcessorData* aData)
{
return nsRestyleHint(0);
}
bool
CommonAnimationManager::HasDocumentStateDependentStyle(StateRuleProcessorData* aData)
{
return false;
}
nsRestyleHint
CommonAnimationManager::HasAttributeDependentStyle(AttributeRuleProcessorData* aData)
{
return nsRestyleHint(0);
}
/* virtual */ bool
CommonAnimationManager::MediumFeaturesChanged(nsPresContext* aPresContext)
{
return false;
}
/* virtual */ size_t
CommonAnimationManager::SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf) const
{
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mElementData
//
// The following members are not measured
// - mPresContext, because it's non-owning
return 0;
}
/* virtual */ size_t
CommonAnimationManager::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
{
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
/* static */ bool
CommonAnimationManager::ExtractComputedValueForTransition(
nsCSSProperty aProperty,
nsStyleContext* aStyleContext,
nsStyleAnimation::Value& aComputedValue)
{
bool result =
nsStyleAnimation::ExtractComputedValue(aProperty, aStyleContext,
aComputedValue);
if (aProperty == eCSSProperty_visibility) {
NS_ABORT_IF_FALSE(aComputedValue.GetUnit() ==
nsStyleAnimation::eUnit_Enumerated,
"unexpected unit");
aComputedValue.SetIntValue(aComputedValue.GetIntValue(),
nsStyleAnimation::eUnit_Visibility);
}
return result;
}
NS_IMPL_ISUPPORTS1(AnimValuesStyleRule, nsIStyleRule)
/* virtual */ void
AnimValuesStyleRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
nsStyleContext *contextParent = aRuleData->mStyleContext->GetParent();
if (contextParent && contextParent->HasPseudoElementData()) {
// Don't apply transitions or animations to things inside of
// pseudo-elements.
// FIXME (Bug 522599): Add tests for this.
return;
}
for (PRUint32 i = 0, i_end = mPropertyValuePairs.Length(); i < i_end; ++i) {
PropertyValuePair &cv = mPropertyValuePairs[i];
if (aRuleData->mSIDs & nsCachedStyleData::GetBitForSID(
nsCSSProps::kSIDTable[cv.mProperty]))
{
nsCSSValue *prop = aRuleData->ValueFor(cv.mProperty);
if (prop->GetUnit() == eCSSUnit_Null) {
#ifdef DEBUG
bool ok =
#endif
nsStyleAnimation::UncomputeValue(cv.mProperty,
aRuleData->mPresContext,
cv.mValue, *prop);
NS_ABORT_IF_FALSE(ok, "could not store computed value");
}
}
}
}
#ifdef DEBUG
/* virtual */ void
AnimValuesStyleRule::List(FILE* out, PRInt32 aIndent) const
{
// WRITE ME?
}
#endif
void
ComputedTimingFunction::Init(const nsTimingFunction &aFunction)
{
mType = aFunction.mType;
if (mType == nsTimingFunction::Function) {
mTimingFunction.Init(aFunction.mFunc.mX1, aFunction.mFunc.mY1,
aFunction.mFunc.mX2, aFunction.mFunc.mY2);
} else {
mSteps = aFunction.mSteps;
}
}
static inline double
StepEnd(PRUint32 aSteps, double aPortion)
{
NS_ABORT_IF_FALSE(0.0 <= aPortion && aPortion <= 1.0, "out of range");
PRUint32 step = PRUint32(aPortion * aSteps); // floor
return double(step) / double(aSteps);
}
double
ComputedTimingFunction::GetValue(double aPortion) const
{
switch (mType) {
case nsTimingFunction::Function:
return mTimingFunction.GetSplineValue(aPortion);
case nsTimingFunction::StepStart:
// There are diagrams in the spec that seem to suggest this check
// and the bounds point should not be symmetric with StepEnd, but
// should actually step up at rather than immediately after the
// fraction points. However, we rely on rounding negative values
// up to zero, so we can't do that. And it's not clear the spec
// really meant it.
return 1.0 - StepEnd(mSteps, 1.0 - aPortion);
default:
NS_ABORT_IF_FALSE(false, "bad type");
// fall through
case nsTimingFunction::StepEnd:
return StepEnd(mSteps, aPortion);
}
}
}
}