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51 package org.apache.fop.fo.pagination;
52
53 import org.apache.fop.fo.*;
55 import org.apache.fop.apps.FOPException;
56
57 import java.util.ArrayList  ;
59
60
67 public class PageSequenceMaster extends FObj {
68
69 public static class Maker extends FObj.Maker {
70 public FObj make(FObj parent, PropertyList propertyList,
71 String systemId, int line, int column)
72 throws FOPException {
73 return new PageSequenceMaster(parent, propertyList,
74 systemId, line, column);
75 }
76
77 }
78
79 public static FObj.Maker maker() {
80 return new PageSequenceMaster.Maker();
81 }
82
83 private LayoutMasterSet layoutMasterSet;
84 private ArrayList subSequenceSpecifiers;
85 private SubSequenceSpecifier currentSubSequence;
86 private int currentSubSequenceNumber;
87 private String masterName;
88
89 protected PageSequenceMaster(FObj parent, PropertyList propertyList,
96 String systemId, int line, int column)
97 throws FOPException {
98 super(parent, propertyList, systemId, line, column);
99
100 if (parent.getName().equals("fo:layout-master-set")) {
101 this.layoutMasterSet = (LayoutMasterSet)parent;
102 this.masterName = this.properties.get("master-name").getString();
103 if (this.masterName == null) {
104 log.warn("page-sequence-master does not have "
105 + "a page-master-name and so is being ignored");
106 } else {
107 this.layoutMasterSet.addPageSequenceMaster(masterName, this);
108 }
109 } else {
110 throw new FOPException("fo:page-sequence-master must be child "
111 + "of fo:layout-master-set, not "
112 + parent.getName(), systemId, line, column);
113 }
114 subSequenceSpecifiers = new ArrayList ();
115 currentSubSequenceNumber = -1;
116 currentSubSequence = null;
117 }
118
119 protected void addSubsequenceSpecifier(SubSequenceSpecifier pageMasterReference) {
120 subSequenceSpecifiers.add(pageMasterReference);
121 }
122
123 protected SubSequenceSpecifier getNextSubSequence() {
124 currentSubSequenceNumber++;
125 if (currentSubSequenceNumber >= 0
126 && currentSubSequenceNumber < subSequenceSpecifiers.size()) {
127 return (SubSequenceSpecifier)subSequenceSpecifiers
128 .get(currentSubSequenceNumber);
129 }
130 return null;
131 }
132
133 public void reset() {
134 currentSubSequenceNumber = -1;
135 currentSubSequence = null;
136 for (int i = 0; i< subSequenceSpecifiers.size(); i++ ) {
137 ((SubSequenceSpecifier)subSequenceSpecifiers.get(i)).reset();
138 }
139 }
140
141 public SimplePageMaster getNextSimplePageMaster(boolean oddPage,
142 boolean blankPage)
143 throws FOPException {
144 boolean firstPage = false;
145 if (currentSubSequence==null) {
146 currentSubSequence = getNextSubSequence();
147 if (currentSubSequence==null) {
148 throw new FOPException("no subsequences in page-sequence-master '"
149 + masterName + "'", systemId, line, column);
150 }
151 firstPage = true;
152 }
153 String pageMasterName = currentSubSequence
154 .getNextPageMasterName(oddPage, firstPage, blankPage);
155 boolean canRecover = true;
156 while (pageMasterName==null) {
157 SubSequenceSpecifier nextSubSequence = getNextSubSequence();
158 firstPage = true;
159 if (nextSubSequence==null) {
160 if (!canRecover) {
161 throw new FOPException("subsequences exhausted in page-sequence-master '"
162 + masterName
163 + "', cannot recover", systemId, line, column);
164 }
165 log.warn("subsequences exhausted in page-sequence-master '"
166 + masterName
167 + "', use previous subsequence");
168 currentSubSequence.reset();
169 canRecover = false;
170 } else {
171 currentSubSequence = nextSubSequence;
172 }
173 pageMasterName = currentSubSequence
174 .getNextPageMasterName(oddPage, firstPage, blankPage);
175 }
176 SimplePageMaster pageMaster=this.layoutMasterSet
177 .getSimplePageMaster(pageMasterName);
178 if (pageMaster==null) {
179 throw new FOPException("No simple-page-master matching '"
180 + pageMasterName + "' in page-sequence-master '"
181 + masterName +"'", systemId, line, column);
182 }
183 return pageMaster;
184 }
185
186 public String getName() {
187 return "fo:page-sequence-master";
188 }
189
190 }
191 |
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