1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
// must be first
#include <canvas/debug.hxx>
#include <expressionnodefactory.hxx>
#include <canvas/verbosetrace.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/point/b2dpoint.hxx>
#include <functional>
#include <algorithm>
/* Implementation of ExpressionNodeFactory class */
namespace slideshow
{
namespace internal
{
namespace
{
class ConstantValueExpression : public ExpressionNode
{
public:
ConstantValueExpression( double rValue ) :
maValue( rValue )
{
}
virtual double operator()( double /*t*/ ) const SAL_OVERRIDE
{
return maValue;
}
virtual bool isConstant() const SAL_OVERRIDE
{
return true;
}
private:
double maValue;
};
class TValueExpression : public ExpressionNode
{
public:
TValueExpression()
{
}
virtual double operator()( double t ) const SAL_OVERRIDE
{
return t;
}
virtual bool isConstant() const SAL_OVERRIDE
{
return false;
}
};
/** Base class for following binary functions (*+-/)
Does not pay off to have all this as a template, since
we'd have to hold the functor as a member (+33% object
size).
*/
class BinaryExpressionBase : public ExpressionNode
{
public:
BinaryExpressionBase( const ExpressionNodeSharedPtr& rFirstArg,
const ExpressionNodeSharedPtr& rSecondArg ) :
mpFirstArg( rFirstArg ),
mpSecondArg( rSecondArg )
{
}
virtual bool isConstant() const SAL_OVERRIDE
{
return
mpFirstArg->isConstant() &&
mpSecondArg->isConstant();
}
protected:
ExpressionNodeSharedPtr mpFirstArg;
ExpressionNodeSharedPtr mpSecondArg;
};
class PlusExpression : public BinaryExpressionBase
{
public:
PlusExpression( const ExpressionNodeSharedPtr& rFirstArg,
const ExpressionNodeSharedPtr& rSecondArg ) :
BinaryExpressionBase( rFirstArg, rSecondArg )
{
}
virtual double operator()( double t ) const SAL_OVERRIDE
{
return (*mpFirstArg)(t) + (*mpSecondArg)(t);
}
};
class MinusExpression : public BinaryExpressionBase
{
public:
MinusExpression( const ExpressionNodeSharedPtr& rFirstArg,
const ExpressionNodeSharedPtr& rSecondArg ) :
BinaryExpressionBase( rFirstArg, rSecondArg )
{
}
virtual double operator()( double t ) const SAL_OVERRIDE
{
return (*mpFirstArg)(t) - (*mpSecondArg)(t);
}
};
class MultipliesExpression : public BinaryExpressionBase
{
public:
MultipliesExpression( const ExpressionNodeSharedPtr& rFirstArg,
const ExpressionNodeSharedPtr& rSecondArg ) :
BinaryExpressionBase( rFirstArg, rSecondArg )
{
}
virtual double operator()( double t ) const SAL_OVERRIDE
{
return (*mpFirstArg)(t) * (*mpSecondArg)(t);
}
};
class DividesExpression : public BinaryExpressionBase
{
public:
DividesExpression( const ExpressionNodeSharedPtr& rFirstArg,
const ExpressionNodeSharedPtr& rSecondArg ) :
BinaryExpressionBase( rFirstArg, rSecondArg )
{
}
virtual double operator()( double t ) const SAL_OVERRIDE
{
return (*mpFirstArg)(t) / (*mpSecondArg)(t);
}
};
class MinExpression : public BinaryExpressionBase
{
public:
MinExpression( const ExpressionNodeSharedPtr& rFirstArg,
const ExpressionNodeSharedPtr& rSecondArg ) :
BinaryExpressionBase( rFirstArg, rSecondArg )
{
}
virtual double operator()( double t ) const SAL_OVERRIDE
{
return ::std::min( (*mpFirstArg)(t), (*mpSecondArg)(t) );
}
};
class MaxExpression : public BinaryExpressionBase
{
public:
MaxExpression( const ExpressionNodeSharedPtr& rFirstArg,
const ExpressionNodeSharedPtr& rSecondArg ) :
BinaryExpressionBase( rFirstArg, rSecondArg )
{
}
virtual double operator()( double t ) const SAL_OVERRIDE
{
return ::std::max( (*mpFirstArg)(t), (*mpSecondArg)(t) );
}
};
}
ExpressionNodeSharedPtr ExpressionNodeFactory::createConstantValueExpression( double rConstantValue )
{
return ExpressionNodeSharedPtr( new ConstantValueExpression(rConstantValue) );
}
ExpressionNodeSharedPtr ExpressionNodeFactory::createValueTExpression()
{
return ExpressionNodeSharedPtr( new TValueExpression() );
}
ExpressionNodeSharedPtr ExpressionNodeFactory::createPlusExpression( const ExpressionNodeSharedPtr& rLHS,
const ExpressionNodeSharedPtr& rRHS )
{
return ExpressionNodeSharedPtr( new PlusExpression(rLHS, rRHS) );
}
ExpressionNodeSharedPtr ExpressionNodeFactory::createMinusExpression( const ExpressionNodeSharedPtr& rLHS,
const ExpressionNodeSharedPtr& rRHS )
{
return ExpressionNodeSharedPtr( new MinusExpression(rLHS, rRHS) );
}
ExpressionNodeSharedPtr ExpressionNodeFactory::createMultipliesExpression( const ExpressionNodeSharedPtr& rLHS,
const ExpressionNodeSharedPtr& rRHS )
{
return ExpressionNodeSharedPtr( new MultipliesExpression(rLHS, rRHS) );
}
ExpressionNodeSharedPtr ExpressionNodeFactory::createDividesExpression( const ExpressionNodeSharedPtr& rLHS,
const ExpressionNodeSharedPtr& rRHS )
{
return ExpressionNodeSharedPtr( new DividesExpression(rLHS, rRHS) );
}
ExpressionNodeSharedPtr ExpressionNodeFactory::createMinExpression ( const ExpressionNodeSharedPtr& rOuterFunction,
const ExpressionNodeSharedPtr& rInnerFunction )
{
return ExpressionNodeSharedPtr( new MinExpression(rOuterFunction, rInnerFunction) );
}
ExpressionNodeSharedPtr ExpressionNodeFactory::createMaxExpression ( const ExpressionNodeSharedPtr& rOuterFunction,
const ExpressionNodeSharedPtr& rInnerFunction )
{
return ExpressionNodeSharedPtr( new MaxExpression(rOuterFunction, rInnerFunction) );
}
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
