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
|
/*
* 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.fo.properties;
import java.util.List;
import org.apache.fop.datatypes.PercentBase;
import org.apache.fop.datatypes.PercentBaseContext;
import org.apache.fop.fo.Constants;
import org.apache.fop.fo.FObj;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.expr.PropertyException;
/**
* Class encapsulating functionality for the <a href="http://www.w3.org/TR/xsl/#background-position>
* <code>background-position</code></a> shorthand.
*/
public class BackgroundPositionShorthand extends ListProperty {
/**
* Inner class for creating instances of this property
*
*/
public static class Maker extends ListProperty.Maker {
/**
* Construct an instance of a Maker for the given property.
*
* @param propId The Constant ID of the property to be made.
*/
public Maker(int propId) {
super(propId);
}
/**
* {@inheritDoc}
* If only <code>background-position-horizontal</code> is
* specified, <code>background-position-vertical</code> is set
* to "50%".
*/
public Property make(PropertyList propertyList, String value, FObj fo) throws PropertyException {
Property p = super.make(propertyList, value, fo);
if (p.getList().size() == 1) {
/* only background-position-horizontal specified
* through the shorthand, as a length or percentage:
* background-position-vertical=50% (see: XSL-FO 1.1 -- 7.31.2)
*/
PropertyMaker m = FObj.getPropertyMakerFor(
Constants.PR_BACKGROUND_POSITION_VERTICAL);
p.getList().add(1, m.make(propertyList, "50%", fo));
}
return p;
}
/**
* {@inheritDoc}
* Returns a {@link org.apache.fop.datatypes.PercentBase} whose
* <code>getDimension()</code> returns 1.
*/
public PercentBase getPercentBase(PropertyList pl) {
return new PercentBase() {
/** {@inheritDoc} */
public int getBaseLength(PercentBaseContext context) throws PropertyException {
return 0;
}
/** {@inheritDoc} */
public double getBaseValue() {
return 0;
}
/** {@inheritDoc} */
public int getDimension() {
return 1;
}
};
}
}
/**
* Inner class to provide shorthand parsing capabilities
*
*/
public static class Parser extends GenericShorthandParser {
/** {@inheritDoc} */
public Property getValueForProperty(int propId,
Property property,
PropertyMaker maker,
PropertyList propertyList)
throws PropertyException {
int index = -1;
List propList = property.getList();
if (propId == Constants.PR_BACKGROUND_POSITION_HORIZONTAL) {
index = 0;
} else if (propId == Constants.PR_BACKGROUND_POSITION_VERTICAL) {
index = 1;
}
if (index >= 0) {
return maker.convertProperty(
(Property) propList.get(index),
propertyList,
propertyList.getFObj());
} // else: invalid index? shouldn't happen...
return null;
}
}
}
|
