gecko/content/smil/nsSMILCompositor.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Mozilla SMIL module.
*
* The Initial Developer of the Original Code is the Mozilla Corporation.
* Portions created by the Initial Developer are Copyright (C) 2008
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Daniel Holbert <dholbert@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef NS_SMILCOMPOSITOR_H_
#define NS_SMILCOMPOSITOR_H_
#include "nsIContent.h"
#include "nsTHashtable.h"
#include "nsAutoPtr.h"
#include "nsString.h"
#include "nsSMILAnimationFunction.h"
#include "nsSMILCompositorTable.h"
#include "pldhash.h"
//----------------------------------------------------------------------
// nsSMILCompositorKey
//
// Hash Key: Animated Element, Attribute Name & Type (CSS vs. XML)
//
// NOTE: Need a nsRefPtr to the element, because nsSMILCompositors are kept
// around for 1 sample after they're used, and they need to make sure their
// target isn't deleted.
struct nsSMILCompositorKey
{
PRBool Equals(const nsSMILCompositorKey &aOther) const;
nsRefPtr<nsIContent> mElement;
nsRefPtr<nsIAtom> mAttributeName; // XXX need to consider namespaces here
PRPackedBool mIsCSS;
};
//----------------------------------------------------------------------
// nsSMILCompositor
//
// Performs the composition of the animation sandwich by combining the results
// of a series animation functions according to the rules of SMIL composition
// including prioritising animations.
class nsSMILCompositor : public PLDHashEntryHdr
{
public:
typedef const nsSMILCompositorKey& KeyType;
typedef const nsSMILCompositorKey* KeyTypePointer;
nsSMILCompositor(KeyTypePointer aKey) : mKey(*aKey) { }
nsSMILCompositor(const nsSMILCompositor& toCopy)
: mKey(toCopy.mKey),
mAnimationFunctions(toCopy.mAnimationFunctions)
{ }
~nsSMILCompositor() { }
// PLDHashEntryHdr methods
KeyType GetKey() const { return mKey; }
PRBool KeyEquals(KeyTypePointer aKey) const;
static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; }
static PLDHashNumber HashKey(KeyTypePointer aKey);
enum { ALLOW_MEMMOVE = PR_FALSE };
// Adds the given animation function to this Compositor's list of functions
void AddAnimationFunction(nsSMILAnimationFunction* aFunc);
// Calls ComposeAttribute() on each nsSMILCompositor in the given hashset
static void ComposeAttributes(nsSMILCompositorTable& aCompositorTable);
// Cycle-collection support
void Traverse(nsCycleCollectionTraversalCallback* aCallback);
private:
// Composes the attribute's current value with the list of animation
// functions, and assigns the resulting value to this compositor's target
// attribute.
void ComposeAttribute();
// Static callback methods
PR_STATIC_CALLBACK(PLDHashOperator) DoComposeAttribute(
nsSMILCompositor* aCompositor, void *aData);
// The hash key (element, attribute name, isCSS)
nsSMILCompositorKey mKey;
// Hash Value: List of animation functions that animate the specified
// attribute
// ---------------------------------------------------------------
nsTArray<nsSMILAnimationFunction*> mAnimationFunctions;
};
#endif // NS_SMILCOMPOSITOR_H_