1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is the Mozilla SMIL module.
16 : *
17 : * The Initial Developer of the Original Code is Brian Birtles.
18 : * Portions created by the Initial Developer are Copyright (C) 2006
19 : * the Initial Developer. All Rights Reserved.
20 : *
21 : * Contributor(s):
22 : * Robert O'Callahan <roc+moz@cs.cmu.edu>
23 : * Brian Birtles <birtles@gmail.com>
24 : *
25 : * Alternatively, the contents of this file may be used under the terms of
26 : * either of the GNU General Public License Version 2 or later (the "GPL"),
27 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 : * in which case the provisions of the GPL or the LGPL are applicable instead
29 : * of those above. If you wish to allow use of your version of this file only
30 : * under the terms of either the GPL or the LGPL, and not to allow others to
31 : * use your version of this file under the terms of the MPL, indicate your
32 : * decision by deleting the provisions above and replace them with the notice
33 : * and other provisions required by the GPL or the LGPL. If you do not delete
34 : * the provisions above, a recipient may use your version of this file under
35 : * the terms of any one of the MPL, the GPL or the LGPL.
36 : *
37 : * ***** END LICENSE BLOCK ***** */
38 :
39 : #include "nsSMILFloatType.h"
40 : #include "nsSMILValue.h"
41 : #include "nsDebug.h"
42 : #include <math.h>
43 :
44 1464 : /*static*/ nsSMILFloatType nsSMILFloatType::sSingleton;
45 :
46 : void
47 0 : nsSMILFloatType::Init(nsSMILValue& aValue) const
48 : {
49 0 : NS_PRECONDITION(aValue.IsNull(), "Unexpected value type");
50 0 : aValue.mU.mDouble = 0.0;
51 0 : aValue.mType = this;
52 0 : }
53 :
54 : void
55 0 : nsSMILFloatType::Destroy(nsSMILValue& aValue) const
56 : {
57 0 : NS_PRECONDITION(aValue.mType == this, "Unexpected SMIL value");
58 0 : aValue.mU.mDouble = 0.0;
59 0 : aValue.mType = &nsSMILNullType::sSingleton;
60 0 : }
61 :
62 : nsresult
63 0 : nsSMILFloatType::Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const
64 : {
65 0 : NS_PRECONDITION(aDest.mType == aSrc.mType, "Incompatible SMIL types");
66 0 : NS_PRECONDITION(aDest.mType == this, "Unexpected SMIL value");
67 0 : aDest.mU.mDouble = aSrc.mU.mDouble;
68 0 : return NS_OK;
69 : }
70 :
71 : bool
72 0 : nsSMILFloatType::IsEqual(const nsSMILValue& aLeft,
73 : const nsSMILValue& aRight) const
74 : {
75 0 : NS_PRECONDITION(aLeft.mType == aRight.mType, "Incompatible SMIL types");
76 0 : NS_PRECONDITION(aLeft.mType == this, "Unexpected type for SMIL value");
77 :
78 0 : return aLeft.mU.mDouble == aRight.mU.mDouble;
79 : }
80 :
81 : nsresult
82 0 : nsSMILFloatType::Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
83 : PRUint32 aCount) const
84 : {
85 0 : NS_PRECONDITION(aValueToAdd.mType == aDest.mType,
86 : "Trying to add invalid types");
87 0 : NS_PRECONDITION(aValueToAdd.mType == this, "Unexpected source type");
88 0 : aDest.mU.mDouble += aValueToAdd.mU.mDouble * aCount;
89 0 : return NS_OK;
90 : }
91 :
92 : nsresult
93 0 : nsSMILFloatType::ComputeDistance(const nsSMILValue& aFrom,
94 : const nsSMILValue& aTo,
95 : double& aDistance) const
96 : {
97 0 : NS_PRECONDITION(aFrom.mType == aTo.mType,"Trying to compare different types");
98 0 : NS_PRECONDITION(aFrom.mType == this, "Unexpected source type");
99 :
100 0 : const double &from = aFrom.mU.mDouble;
101 0 : const double &to = aTo.mU.mDouble;
102 :
103 0 : aDistance = fabs(to - from);
104 :
105 0 : return NS_OK;
106 : }
107 :
108 : nsresult
109 0 : nsSMILFloatType::Interpolate(const nsSMILValue& aStartVal,
110 : const nsSMILValue& aEndVal,
111 : double aUnitDistance,
112 : nsSMILValue& aResult) const
113 : {
114 0 : NS_PRECONDITION(aStartVal.mType == aEndVal.mType,
115 : "Trying to interpolate different types");
116 0 : NS_PRECONDITION(aStartVal.mType == this,
117 : "Unexpected types for interpolation");
118 0 : NS_PRECONDITION(aResult.mType == this, "Unexpected result type");
119 :
120 0 : const double &startVal = aStartVal.mU.mDouble;
121 0 : const double &endVal = aEndVal.mU.mDouble;
122 :
123 0 : aResult.mU.mDouble = (startVal + (endVal - startVal) * aUnitDistance);
124 :
125 0 : return NS_OK;
126 4392 : }
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