зеркало из https://github.com/mozilla/pjs.git
172 строки
6.5 KiB
C++
172 строки
6.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Mozilla SMIL module.
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*
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* The Initial Developer of the Original Code is the Mozilla Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Daniel Holbert <dholbert@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* representation of a SMIL-animatable mapped attribute on an element */
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#include "nsSMILMappedAttribute.h"
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#include "nsPropertyTable.h"
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#include "nsContentErrors.h" // For NS_PROPTABLE_PROP_OVERWRITTEN
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#include "nsSMILValue.h"
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#include "nsSMILCSSValueType.h"
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#include "nsIContent.h"
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#include "nsIDocument.h"
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#include "nsIPresShell.h"
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#include "nsCSSProps.h"
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#include "mozilla/dom/Element.h"
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// Callback function, for freeing string buffers stored in property table
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static void
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ReleaseStringBufferPropertyValue(void* aObject, /* unused */
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nsIAtom* aPropertyName, /* unused */
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void* aPropertyValue,
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void* aData /* unused */)
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{
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nsStringBuffer* buf = static_cast<nsStringBuffer*>(aPropertyValue);
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buf->Release();
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}
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nsresult
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nsSMILMappedAttribute::ValueFromString(const nsAString& aStr,
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const nsISMILAnimationElement* aSrcElement,
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nsSMILValue& aValue,
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bool& aPreventCachingOfSandwich) const
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{
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NS_ENSURE_TRUE(IsPropertyAnimatable(mPropID), NS_ERROR_FAILURE);
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nsSMILCSSValueType::ValueFromString(mPropID, mElement, aStr, aValue,
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&aPreventCachingOfSandwich);
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return aValue.IsNull() ? NS_ERROR_FAILURE : NS_OK;
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}
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nsSMILValue
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nsSMILMappedAttribute::GetBaseValue() const
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{
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nsAutoString baseStringValue;
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nsRefPtr<nsIAtom> attrName = GetAttrNameAtom();
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bool success = mElement->GetAttr(kNameSpaceID_None, attrName,
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baseStringValue);
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nsSMILValue baseValue;
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if (success) {
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// For base values, we don't need to worry whether the value returned is
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// context-sensitive or not since the compositor will take care of comparing
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// the returned (computed) base value and its cached value and determining
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// if an update is required or not.
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nsSMILCSSValueType::ValueFromString(mPropID, mElement,
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baseStringValue, baseValue, nsnull);
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} else {
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// Attribute is unset -- use computed value.
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// FIRST: Temporarily clear animated value, to make sure it doesn't pollute
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// the computed value. (We want base value, _without_ animations applied.)
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void* buf = mElement->UnsetProperty(SMIL_MAPPED_ATTR_ANIMVAL,
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attrName, nsnull);
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FlushChangesToTargetAttr();
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// SECOND: we use nsSMILCSSProperty::GetBaseValue to look up the property's
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// computed value. NOTE: This call will temporarily clear the SMIL
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// override-style for the corresponding CSS property on our target element.
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// This prevents any animations that target the CSS property from affecting
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// animations that target the mapped attribute.
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baseValue = nsSMILCSSProperty::GetBaseValue();
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// FINALLY: If we originally had an animated value set, then set it again.
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if (buf) {
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mElement->SetProperty(SMIL_MAPPED_ATTR_ANIMVAL, attrName, buf,
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ReleaseStringBufferPropertyValue);
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FlushChangesToTargetAttr();
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}
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}
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return baseValue;
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}
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nsresult
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nsSMILMappedAttribute::SetAnimValue(const nsSMILValue& aValue)
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{
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NS_ENSURE_TRUE(IsPropertyAnimatable(mPropID), NS_ERROR_FAILURE);
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// Convert nsSMILValue to string
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nsAutoString valStr;
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if (!nsSMILCSSValueType::ValueToString(aValue, valStr)) {
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NS_WARNING("Failed to convert nsSMILValue for mapped attr into a string");
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return NS_ERROR_FAILURE;
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}
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// Set the string as this mapped attribute's animated value.
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nsStringBuffer* valStrBuf =
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nsCSSValue::BufferFromString(nsString(valStr)).get();
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nsRefPtr<nsIAtom> attrName = GetAttrNameAtom();
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nsresult rv = mElement->SetProperty(SMIL_MAPPED_ATTR_ANIMVAL,
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attrName, valStrBuf,
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ReleaseStringBufferPropertyValue);
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if (rv == NS_PROPTABLE_PROP_OVERWRITTEN) {
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rv = NS_OK;
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}
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FlushChangesToTargetAttr();
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return rv;
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}
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void
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nsSMILMappedAttribute::ClearAnimValue()
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{
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nsRefPtr<nsIAtom> attrName = GetAttrNameAtom();
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mElement->DeleteProperty(SMIL_MAPPED_ATTR_ANIMVAL, attrName);
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FlushChangesToTargetAttr();
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}
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void
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nsSMILMappedAttribute::FlushChangesToTargetAttr() const
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{
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// Clear animated content-style-rule
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mElement->DeleteProperty(SMIL_MAPPED_ATTR_ANIMVAL,
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SMIL_MAPPED_ATTR_STYLERULE_ATOM);
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nsIDocument* doc = mElement->GetCurrentDoc();
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// Request animation restyle
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if (doc) {
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nsIPresShell* shell = doc->GetShell();
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if (shell) {
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shell->RestyleForAnimation(mElement, eRestyle_Self);
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}
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}
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}
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already_AddRefed<nsIAtom>
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nsSMILMappedAttribute::GetAttrNameAtom() const
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{
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return do_GetAtom(nsCSSProps::GetStringValue(mPropID));
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}
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