The Tor Browser / file comparison
comparison: dom/smil/nsSMILMappedAttribute.cpp
dom/smil/nsSMILMappedAttribute.cpp
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:5f677b717670 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 /* representation of a SMIL-animatable mapped attribute on an element */ | |
| 7 #include "nsSMILMappedAttribute.h" | |
| 8 #include "nsContentUtils.h" | |
| 9 #include "nsError.h" // For NS_PROPTABLE_PROP_OVERWRITTEN | |
| 10 #include "nsSMILValue.h" | |
| 11 #include "nsSMILCSSValueType.h" | |
| 12 #include "nsIDocument.h" | |
| 13 #include "nsIPresShell.h" | |
| 14 #include "nsCSSProps.h" | |
| 15 #include "mozilla/dom/Element.h" | |
| 16 | |
| 17 // Callback function, for freeing string buffers stored in property table | |
| 18 static void | |
| 19 ReleaseStringBufferPropertyValue(void* aObject, /* unused */ | |
| 20 nsIAtom* aPropertyName, /* unused */ | |
| 21 void* aPropertyValue, | |
| 22 void* aData /* unused */) | |
| 23 { | |
| 24 nsStringBuffer* buf = static_cast<nsStringBuffer*>(aPropertyValue); | |
| 25 buf->Release(); | |
| 26 } | |
| 27 | |
| 28 | |
| 29 nsresult | |
| 30 nsSMILMappedAttribute::ValueFromString(const nsAString& aStr, | |
| 31 const mozilla::dom::SVGAnimationElement* aSrcElement, | |
| 32 nsSMILValue& aValue, | |
| 33 bool& aPreventCachingOfSandwich) const | |
| 34 { | |
| 35 NS_ENSURE_TRUE(IsPropertyAnimatable(mPropID), NS_ERROR_FAILURE); | |
| 36 | |
| 37 nsSMILCSSValueType::ValueFromString(mPropID, mElement, aStr, aValue, | |
| 38 &aPreventCachingOfSandwich); | |
| 39 return aValue.IsNull() ? NS_ERROR_FAILURE : NS_OK; | |
| 40 } | |
| 41 | |
| 42 nsSMILValue | |
| 43 nsSMILMappedAttribute::GetBaseValue() const | |
| 44 { | |
| 45 nsAutoString baseStringValue; | |
| 46 nsRefPtr<nsIAtom> attrName = GetAttrNameAtom(); | |
| 47 bool success = mElement->GetAttr(kNameSpaceID_None, attrName, | |
| 48 baseStringValue); | |
| 49 nsSMILValue baseValue; | |
| 50 if (success) { | |
| 51 // For base values, we don't need to worry whether the value returned is | |
| 52 // context-sensitive or not since the compositor will take care of comparing | |
| 53 // the returned (computed) base value and its cached value and determining | |
| 54 // if an update is required or not. | |
| 55 nsSMILCSSValueType::ValueFromString(mPropID, mElement, | |
| 56 baseStringValue, baseValue, nullptr); | |
| 57 } else { | |
| 58 // Attribute is unset -- use computed value. | |
| 59 // FIRST: Temporarily clear animated value, to make sure it doesn't pollute | |
| 60 // the computed value. (We want base value, _without_ animations applied.) | |
| 61 void* buf = mElement->UnsetProperty(SMIL_MAPPED_ATTR_ANIMVAL, | |
| 62 attrName, nullptr); | |
| 63 FlushChangesToTargetAttr(); | |
| 64 | |
| 65 // SECOND: we use nsSMILCSSProperty::GetBaseValue to look up the property's | |
| 66 // computed value. NOTE: This call will temporarily clear the SMIL | |
| 67 // override-style for the corresponding CSS property on our target element. | |
| 68 // This prevents any animations that target the CSS property from affecting | |
| 69 // animations that target the mapped attribute. | |
| 70 baseValue = nsSMILCSSProperty::GetBaseValue(); | |
| 71 | |
| 72 // FINALLY: If we originally had an animated value set, then set it again. | |
| 73 if (buf) { | |
| 74 mElement->SetProperty(SMIL_MAPPED_ATTR_ANIMVAL, attrName, buf, | |
| 75 ReleaseStringBufferPropertyValue); | |
| 76 FlushChangesToTargetAttr(); | |
| 77 } | |
| 78 } | |
| 79 return baseValue; | |
| 80 } | |
| 81 | |
| 82 nsresult | |
| 83 nsSMILMappedAttribute::SetAnimValue(const nsSMILValue& aValue) | |
| 84 { | |
| 85 NS_ENSURE_TRUE(IsPropertyAnimatable(mPropID), NS_ERROR_FAILURE); | |
| 86 | |
| 87 // Convert nsSMILValue to string | |
| 88 nsAutoString valStr; | |
| 89 if (!nsSMILCSSValueType::ValueToString(aValue, valStr)) { | |
| 90 NS_WARNING("Failed to convert nsSMILValue for mapped attr into a string"); | |
| 91 return NS_ERROR_FAILURE; | |
| 92 } | |
| 93 | |
| 94 nsRefPtr<nsIAtom> attrName = GetAttrNameAtom(); | |
| 95 nsStringBuffer* oldValStrBuf = static_cast<nsStringBuffer*> | |
| 96 (mElement->GetProperty(SMIL_MAPPED_ATTR_ANIMVAL, attrName)); | |
| 97 if (oldValStrBuf) { | |
| 98 nsString oldValStr; | |
| 99 nsContentUtils::PopulateStringFromStringBuffer(oldValStrBuf, oldValStr); | |
| 100 if (valStr.Equals(oldValStr)) { | |
| 101 // New animated value is the same as the old; nothing to do. | |
| 102 return NS_OK; | |
| 103 } | |
| 104 } | |
| 105 | |
| 106 // Set the string as this mapped attribute's animated value. | |
| 107 nsStringBuffer* valStrBuf = | |
| 108 nsCSSValue::BufferFromString(nsString(valStr)).take(); | |
| 109 nsresult rv = mElement->SetProperty(SMIL_MAPPED_ATTR_ANIMVAL, | |
| 110 attrName, valStrBuf, | |
| 111 ReleaseStringBufferPropertyValue); | |
| 112 if (rv == NS_PROPTABLE_PROP_OVERWRITTEN) { | |
| 113 rv = NS_OK; | |
| 114 } | |
| 115 FlushChangesToTargetAttr(); | |
| 116 | |
| 117 return rv; | |
| 118 } | |
| 119 | |
| 120 void | |
| 121 nsSMILMappedAttribute::ClearAnimValue() | |
| 122 { | |
| 123 nsRefPtr<nsIAtom> attrName = GetAttrNameAtom(); | |
| 124 mElement->DeleteProperty(SMIL_MAPPED_ATTR_ANIMVAL, attrName); | |
| 125 FlushChangesToTargetAttr(); | |
| 126 } | |
| 127 | |
| 128 void | |
| 129 nsSMILMappedAttribute::FlushChangesToTargetAttr() const | |
| 130 { | |
| 131 // Clear animated content-style-rule | |
| 132 mElement->DeleteProperty(SMIL_MAPPED_ATTR_ANIMVAL, | |
| 133 SMIL_MAPPED_ATTR_STYLERULE_ATOM); | |
| 134 nsIDocument* doc = mElement->GetCurrentDoc(); | |
| 135 | |
| 136 // Request animation restyle | |
| 137 if (doc) { | |
| 138 nsIPresShell* shell = doc->GetShell(); | |
| 139 if (shell) { | |
| 140 shell->RestyleForAnimation(mElement, eRestyle_Self); | |
| 141 } | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 already_AddRefed<nsIAtom> | |
| 146 nsSMILMappedAttribute::GetAttrNameAtom() const | |
| 147 { | |
| 148 return do_GetAtom(nsCSSProps::GetStringValue(mPropID)); | |
| 149 } |
