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120 lines
4.2 KiB
C++
120 lines
4.2 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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#ifndef NS_SMILTARGETIDENTIFIER_H_
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#define NS_SMILTARGETIDENTIFIER_H_
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#include "mozilla/dom/Element.h"
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#include "nsAutoPtr.h"
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#include "prtypes.h"
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/**
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* Struct: nsSMILTargetIdentifier
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*
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* Tuple of: { Animated Element, Attribute Name, Attribute Type (CSS vs. XML) }
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*
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* Used in nsSMILAnimationController as hash key for mapping an animation
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* target to the nsSMILCompositor for that target.
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*
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* NOTE: Need a nsRefPtr for the element & attribute name, because
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* nsSMILAnimationController retain its hash table for one sample into the
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* future, and we need to make sure their target isn't deleted in that time.
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*/
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struct nsSMILTargetIdentifier
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{
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nsSMILTargetIdentifier()
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: mElement(nsnull), mAttributeName(nsnull),
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mAttributeNamespaceID(kNameSpaceID_Unknown), mIsCSS(false) {}
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inline bool Equals(const nsSMILTargetIdentifier& aOther) const
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{
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return (aOther.mElement == mElement &&
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aOther.mAttributeName == mAttributeName &&
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aOther.mAttributeNamespaceID == mAttributeNamespaceID &&
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aOther.mIsCSS == mIsCSS);
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}
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nsRefPtr<mozilla::dom::Element> mElement;
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nsRefPtr<nsIAtom> mAttributeName;
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PRInt32 mAttributeNamespaceID;
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bool mIsCSS;
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};
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/**
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* Class: nsSMILWeakTargetIdentifier
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*
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* Version of the above struct that uses non-owning pointers. These are kept
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* private, to ensure that they aren't ever dereferenced (or used at all,
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* outside of Equals()).
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*
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* This is solely for comparisons to determine if a target has changed
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* from one sample to the next.
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*/
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class nsSMILWeakTargetIdentifier
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{
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public:
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// Trivial constructor
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nsSMILWeakTargetIdentifier()
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: mElement(nsnull), mAttributeName(nsnull), mIsCSS(false) {}
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// Allow us to update a weak identifier to match a given non-weak identifier
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nsSMILWeakTargetIdentifier&
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operator=(const nsSMILTargetIdentifier& aOther)
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{
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mElement = aOther.mElement;
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mAttributeName = aOther.mAttributeName;
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mIsCSS = aOther.mIsCSS;
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return *this;
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}
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// Allow for comparison vs. non-weak identifier
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inline bool Equals(const nsSMILTargetIdentifier& aOther) const
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{
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return (aOther.mElement == mElement &&
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aOther.mAttributeName == mAttributeName &&
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aOther.mIsCSS == mIsCSS);
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}
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private:
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const nsIContent* mElement;
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const nsIAtom* mAttributeName;
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bool mIsCSS;
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};
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#endif // NS_SMILTARGETIDENTIFIER_H_
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