blob: 544ff612a581d1b024c368775b37cdea4954a3ef (
plain)
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.area;
// Java
import java.util.List;
import org.xml.sax.SAXException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* This is the model for the area tree object.
* The model implementation can handle the page sequence,
* page and off-document items.
* The methods to access the page viewports can only
* assume the PageViewport is valid as it remains for
* the life of the area tree model.
*/
public class AreaTreeModel {
private List/*<PageSequence>*/ pageSequenceList = null;
private int currentPageSequenceIndex = -1;
/** the current page sequence */
protected PageSequence currentPageSequence;
// private List offDocumentItems = new java.util.ArrayList();
/** logger instance */
protected static Log log = LogFactory.getLog(AreaTreeModel.class);
/**
* Create a new store pages model
*/
public AreaTreeModel() {
pageSequenceList = new java.util.ArrayList/*<PageSequence>*/();
}
/**
* Start a page sequence on this model.
* @param pageSequence the page sequence about to start
*/
public void startPageSequence(PageSequence pageSequence) {
if (pageSequence == null) {
throw new NullPointerException("pageSequence must not be null");
}
this.currentPageSequence = pageSequence;
pageSequenceList.add(currentPageSequence);
currentPageSequenceIndex = pageSequenceList.size() - 1;
}
/**
* Add a page to this model.
* @param page the page to add to the model.
*/
public void addPage(PageViewport page) {
currentPageSequence.addPage(page);
int pageIndex = 0;
for (int i = 0; i < currentPageSequenceIndex; i++) {
pageIndex += ((PageSequence)pageSequenceList.get(i)).getPageCount();
}
pageIndex += currentPageSequence.getPageCount() - 1;
page.setPageIndex(pageIndex);
page.setPageSequence(currentPageSequence);
}
/**
* Handle an OffDocumentItem
* @param ext the extension to handle
*/
public void handleOffDocumentItem(OffDocumentItem ext) { };
/**
* Signal the end of the document for any processing.
* @throws SAXException if a problem was encountered.
*/
public void endDocument() throws SAXException { };
/**
* Returns the currently active page-sequence.
* @return the currently active page-sequence
*/
public PageSequence getCurrentPageSequence() {
return this.currentPageSequence;
}
/**
* Get the page sequence count.
* @return the number of page sequences in the document.
*/
public int getPageSequenceCount() {
return pageSequenceList.size();
}
/**
* Get the page count.
* @param seq the page sequence to count.
* @return returns the number of pages in a page sequence
*/
public int getPageCount(int seq) {
PageSequence sequence = (PageSequence)pageSequenceList.get(seq - 1);
return sequence.getPageCount();
}
/**
* Get the page for a position in the document.
* @param seq the page sequence number
* @param count the page count in the sequence
* @return the PageViewport for the particular page
*/
public PageViewport getPage(int seq, int count) {
PageSequence sequence = (PageSequence)pageSequenceList.get(seq - 1);
return sequence.getPage(count);
}
}
|
