1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/smil/nsSMILMappedAttribute.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,149 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/* representation of a SMIL-animatable mapped attribute on an element */
1.10 +#include "nsSMILMappedAttribute.h"
1.11 +#include "nsContentUtils.h"
1.12 +#include "nsError.h" // For NS_PROPTABLE_PROP_OVERWRITTEN
1.13 +#include "nsSMILValue.h"
1.14 +#include "nsSMILCSSValueType.h"
1.15 +#include "nsIDocument.h"
1.16 +#include "nsIPresShell.h"
1.17 +#include "nsCSSProps.h"
1.18 +#include "mozilla/dom/Element.h"
1.19 +
1.20 +// Callback function, for freeing string buffers stored in property table
1.21 +static void
1.22 +ReleaseStringBufferPropertyValue(void* aObject, /* unused */
1.23 + nsIAtom* aPropertyName, /* unused */
1.24 + void* aPropertyValue,
1.25 + void* aData /* unused */)
1.26 +{
1.27 + nsStringBuffer* buf = static_cast<nsStringBuffer*>(aPropertyValue);
1.28 + buf->Release();
1.29 +}
1.30 +
1.31 +
1.32 +nsresult
1.33 +nsSMILMappedAttribute::ValueFromString(const nsAString& aStr,
1.34 + const mozilla::dom::SVGAnimationElement* aSrcElement,
1.35 + nsSMILValue& aValue,
1.36 + bool& aPreventCachingOfSandwich) const
1.37 +{
1.38 + NS_ENSURE_TRUE(IsPropertyAnimatable(mPropID), NS_ERROR_FAILURE);
1.39 +
1.40 + nsSMILCSSValueType::ValueFromString(mPropID, mElement, aStr, aValue,
1.41 + &aPreventCachingOfSandwich);
1.42 + return aValue.IsNull() ? NS_ERROR_FAILURE : NS_OK;
1.43 +}
1.44 +
1.45 +nsSMILValue
1.46 +nsSMILMappedAttribute::GetBaseValue() const
1.47 +{
1.48 + nsAutoString baseStringValue;
1.49 + nsRefPtr<nsIAtom> attrName = GetAttrNameAtom();
1.50 + bool success = mElement->GetAttr(kNameSpaceID_None, attrName,
1.51 + baseStringValue);
1.52 + nsSMILValue baseValue;
1.53 + if (success) {
1.54 + // For base values, we don't need to worry whether the value returned is
1.55 + // context-sensitive or not since the compositor will take care of comparing
1.56 + // the returned (computed) base value and its cached value and determining
1.57 + // if an update is required or not.
1.58 + nsSMILCSSValueType::ValueFromString(mPropID, mElement,
1.59 + baseStringValue, baseValue, nullptr);
1.60 + } else {
1.61 + // Attribute is unset -- use computed value.
1.62 + // FIRST: Temporarily clear animated value, to make sure it doesn't pollute
1.63 + // the computed value. (We want base value, _without_ animations applied.)
1.64 + void* buf = mElement->UnsetProperty(SMIL_MAPPED_ATTR_ANIMVAL,
1.65 + attrName, nullptr);
1.66 + FlushChangesToTargetAttr();
1.67 +
1.68 + // SECOND: we use nsSMILCSSProperty::GetBaseValue to look up the property's
1.69 + // computed value. NOTE: This call will temporarily clear the SMIL
1.70 + // override-style for the corresponding CSS property on our target element.
1.71 + // This prevents any animations that target the CSS property from affecting
1.72 + // animations that target the mapped attribute.
1.73 + baseValue = nsSMILCSSProperty::GetBaseValue();
1.74 +
1.75 + // FINALLY: If we originally had an animated value set, then set it again.
1.76 + if (buf) {
1.77 + mElement->SetProperty(SMIL_MAPPED_ATTR_ANIMVAL, attrName, buf,
1.78 + ReleaseStringBufferPropertyValue);
1.79 + FlushChangesToTargetAttr();
1.80 + }
1.81 + }
1.82 + return baseValue;
1.83 +}
1.84 +
1.85 +nsresult
1.86 +nsSMILMappedAttribute::SetAnimValue(const nsSMILValue& aValue)
1.87 +{
1.88 + NS_ENSURE_TRUE(IsPropertyAnimatable(mPropID), NS_ERROR_FAILURE);
1.89 +
1.90 + // Convert nsSMILValue to string
1.91 + nsAutoString valStr;
1.92 + if (!nsSMILCSSValueType::ValueToString(aValue, valStr)) {
1.93 + NS_WARNING("Failed to convert nsSMILValue for mapped attr into a string");
1.94 + return NS_ERROR_FAILURE;
1.95 + }
1.96 +
1.97 + nsRefPtr<nsIAtom> attrName = GetAttrNameAtom();
1.98 + nsStringBuffer* oldValStrBuf = static_cast<nsStringBuffer*>
1.99 + (mElement->GetProperty(SMIL_MAPPED_ATTR_ANIMVAL, attrName));
1.100 + if (oldValStrBuf) {
1.101 + nsString oldValStr;
1.102 + nsContentUtils::PopulateStringFromStringBuffer(oldValStrBuf, oldValStr);
1.103 + if (valStr.Equals(oldValStr)) {
1.104 + // New animated value is the same as the old; nothing to do.
1.105 + return NS_OK;
1.106 + }
1.107 + }
1.108 +
1.109 + // Set the string as this mapped attribute's animated value.
1.110 + nsStringBuffer* valStrBuf =
1.111 + nsCSSValue::BufferFromString(nsString(valStr)).take();
1.112 + nsresult rv = mElement->SetProperty(SMIL_MAPPED_ATTR_ANIMVAL,
1.113 + attrName, valStrBuf,
1.114 + ReleaseStringBufferPropertyValue);
1.115 + if (rv == NS_PROPTABLE_PROP_OVERWRITTEN) {
1.116 + rv = NS_OK;
1.117 + }
1.118 + FlushChangesToTargetAttr();
1.119 +
1.120 + return rv;
1.121 +}
1.122 +
1.123 +void
1.124 +nsSMILMappedAttribute::ClearAnimValue()
1.125 +{
1.126 + nsRefPtr<nsIAtom> attrName = GetAttrNameAtom();
1.127 + mElement->DeleteProperty(SMIL_MAPPED_ATTR_ANIMVAL, attrName);
1.128 + FlushChangesToTargetAttr();
1.129 +}
1.130 +
1.131 +void
1.132 +nsSMILMappedAttribute::FlushChangesToTargetAttr() const
1.133 +{
1.134 + // Clear animated content-style-rule
1.135 + mElement->DeleteProperty(SMIL_MAPPED_ATTR_ANIMVAL,
1.136 + SMIL_MAPPED_ATTR_STYLERULE_ATOM);
1.137 + nsIDocument* doc = mElement->GetCurrentDoc();
1.138 +
1.139 + // Request animation restyle
1.140 + if (doc) {
1.141 + nsIPresShell* shell = doc->GetShell();
1.142 + if (shell) {
1.143 + shell->RestyleForAnimation(mElement, eRestyle_Self);
1.144 + }
1.145 + }
1.146 +}
1.147 +
1.148 +already_AddRefed<nsIAtom>
1.149 +nsSMILMappedAttribute::GetAttrNameAtom() const
1.150 +{
1.151 + return do_GetAtom(nsCSSProps::GetStringValue(mPropID));
1.152 +}
