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/* -*- 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/. */
/* representation of a SMIL-animatable mapped attribute on an element */
#include "nsSMILMappedAttribute.h"
#include "nsContentUtils.h"
#include "nsError.h" // For NS_PROPTABLE_PROP_OVERWRITTEN
#include "nsSMILValue.h"
#include "nsSMILCSSValueType.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsCSSProps.h"
#include "mozilla/dom/Element.h"
// Callback function, for freeing string buffers stored in property table
static void
ReleaseStringBufferPropertyValue(void* aObject, /* unused */
nsIAtom* aPropertyName, /* unused */
void* aPropertyValue,
void* aData /* unused */)
{
nsStringBuffer* buf = static_cast<nsStringBuffer*>(aPropertyValue);
buf->Release();
}
nsresult
nsSMILMappedAttribute::ValueFromString(const nsAString& aStr,
const mozilla::dom::SVGAnimationElement* aSrcElement,
nsSMILValue& aValue,
bool& aPreventCachingOfSandwich) const
{
NS_ENSURE_TRUE(IsPropertyAnimatable(mPropID), NS_ERROR_FAILURE);
nsSMILCSSValueType::ValueFromString(mPropID, mElement, aStr, aValue,
&aPreventCachingOfSandwich);
return aValue.IsNull() ? NS_ERROR_FAILURE : NS_OK;
}
nsSMILValue
nsSMILMappedAttribute::GetBaseValue() const
{
nsAutoString baseStringValue;
RefPtr<nsIAtom> attrName = GetAttrNameAtom();
bool success = mElement->GetAttr(kNameSpaceID_None, attrName,
baseStringValue);
nsSMILValue baseValue;
if (success) {
// For base values, we don't need to worry whether the value returned is
// context-sensitive or not since the compositor will take care of comparing
// the returned (computed) base value and its cached value and determining
// if an update is required or not.
nsSMILCSSValueType::ValueFromString(mPropID, mElement,
baseStringValue, baseValue, nullptr);
} else {
// Attribute is unset -- use computed value.
// FIRST: Temporarily clear animated value, to make sure it doesn't pollute
// the computed value. (We want base value, _without_ animations applied.)
void* buf = mElement->UnsetProperty(SMIL_MAPPED_ATTR_ANIMVAL,
attrName, nullptr);
FlushChangesToTargetAttr();
// SECOND: we use nsSMILCSSProperty::GetBaseValue to look up the property's
// computed value. NOTE: This call will temporarily clear the SMIL
// override-style for the corresponding CSS property on our target element.
// This prevents any animations that target the CSS property from affecting
// animations that target the mapped attribute.
baseValue = nsSMILCSSProperty::GetBaseValue();
// FINALLY: If we originally had an animated value set, then set it again.
if (buf) {
mElement->SetProperty(SMIL_MAPPED_ATTR_ANIMVAL, attrName, buf,
ReleaseStringBufferPropertyValue);
FlushChangesToTargetAttr();
}
}
return baseValue;
}
nsresult
nsSMILMappedAttribute::SetAnimValue(const nsSMILValue& aValue)
{
NS_ENSURE_TRUE(IsPropertyAnimatable(mPropID), NS_ERROR_FAILURE);
// Convert nsSMILValue to string
nsAutoString valStr;
if (!nsSMILCSSValueType::ValueToString(aValue, valStr)) {
NS_WARNING("Failed to convert nsSMILValue for mapped attr into a string");
return NS_ERROR_FAILURE;
}
RefPtr<nsIAtom> attrName = GetAttrNameAtom();
nsStringBuffer* oldValStrBuf = static_cast<nsStringBuffer*>
(mElement->GetProperty(SMIL_MAPPED_ATTR_ANIMVAL, attrName));
if (oldValStrBuf) {
nsString oldValStr;
nsContentUtils::PopulateStringFromStringBuffer(oldValStrBuf, oldValStr);
if (valStr.Equals(oldValStr)) {
// New animated value is the same as the old; nothing to do.
return NS_OK;
}
}
// Set the string as this mapped attribute's animated value.
nsStringBuffer* valStrBuf =
nsCSSValue::BufferFromString(nsString(valStr)).take();
nsresult rv = mElement->SetProperty(SMIL_MAPPED_ATTR_ANIMVAL,
attrName, valStrBuf,
ReleaseStringBufferPropertyValue);
if (rv == NS_PROPTABLE_PROP_OVERWRITTEN) {
rv = NS_OK;
}
FlushChangesToTargetAttr();
return rv;
}
void
nsSMILMappedAttribute::ClearAnimValue()
{
RefPtr<nsIAtom> attrName = GetAttrNameAtom();
mElement->DeleteProperty(SMIL_MAPPED_ATTR_ANIMVAL, attrName);
FlushChangesToTargetAttr();
}
void
nsSMILMappedAttribute::FlushChangesToTargetAttr() const
{
// Clear animated content-style-rule
mElement->DeleteProperty(SMIL_MAPPED_ATTR_ANIMVAL,
SMIL_MAPPED_ATTR_STYLERULE_ATOM);
nsIDocument* doc = mElement->GetUncomposedDoc();
// Request animation restyle
if (doc) {
nsIPresShell* shell = doc->GetShell();
if (shell) {
shell->RestyleForAnimation(mElement, eRestyle_Self);
}
}
}
already_AddRefed<nsIAtom>
nsSMILMappedAttribute::GetAttrNameAtom() const
{
return NS_Atomize(nsCSSProps::GetStringValue(mPropID));
}
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