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50
51 package com.lowagie.text.pdf;
52 import java.io.IOException  ;
53 import java.util.ArrayList ;
54 import java.util.HashMap ;
55 import java.util.Iterator ;
56
61 class PdfReaderInstance {
62 static final PdfLiteral IDENTITYMATRIX = new PdfLiteral("[1 0 0 1 0 0]");
63 static final PdfNumber ONE = new PdfNumber(1);
64 int myXref[];
65 PdfReader reader;
66 RandomAccessFileOrArray file;
67 HashMap importedPages = new HashMap ();
68 PdfWriter writer;
69 HashMap visited = new HashMap ();
70 ArrayList nextRound = new ArrayList ();
71
72 PdfReaderInstance(PdfReader reader, PdfWriter writer) {
73 this.reader = reader;
74 this.writer = writer;
75 file = reader.getSafeFile();
76 myXref = new int[reader.getXrefSize()];
77 }
78
79 PdfReader getReader() {
80 return reader;
81 }
82
83 PdfImportedPage getImportedPage(int pageNumber) {
84 if (!reader.isOpenedWithFullPermissions())
85 throw new IllegalArgumentException ("PdfReader not opened with owner password");
86 if (pageNumber < 1 || pageNumber > reader.getNumberOfPages())
87 throw new IllegalArgumentException ("Invalid page number");
88 Integer i = new Integer (pageNumber);
89 PdfImportedPage pageT = (PdfImportedPage)importedPages.get(i);
90 if (pageT == null) {
91 pageT = new PdfImportedPage(this, writer, pageNumber);
92 importedPages.put(i, pageT);
93 }
94 return pageT;
95 }
96
97 int getNewObjectNumber(int number, int generation) {
98 if (myXref[number] == 0) {
99 myXref[number] = writer.getIndirectReferenceNumber();
100 nextRound.add(new Integer (number));
101 }
102 return myXref[number];
103 }
104
105 RandomAccessFileOrArray getReaderFile() {
106 return file;
107 }
108
109 PdfObject getResources(int pageNumber) {
110 PdfObject obj = PdfReader.getPdfObjectRelease(reader.getPageNRelease(pageNumber).get(PdfName.RESOURCES));
111 return obj;
112 }
113
114
115 PdfStream getFormXObject(int pageNumber) throws IOException {
116 PdfDictionary page = reader.getPageNRelease(pageNumber);
117 PdfObject contents = PdfReader.getPdfObjectRelease(page.get(PdfName.CONTENTS));
118 PdfDictionary dic = new PdfDictionary();
119 byte bout[] = null;
120 if (contents != null) {
121 if (contents.isStream())
122 dic.putAll((PRStream)contents);
123 else
124 bout = reader.getPageContent(pageNumber, file);
125 }
126 else
127 bout = new byte[0];
128 dic.put(PdfName.RESOURCES, PdfReader.getPdfObjectRelease(page.get(PdfName.RESOURCES)));
129 dic.put(PdfName.TYPE, PdfName.XOBJECT);
130 dic.put(PdfName.SUBTYPE, PdfName.FORM);
131 PdfImportedPage impPage = (PdfImportedPage)importedPages.get(new Integer (pageNumber));
132 dic.put(PdfName.BBOX, new PdfRectangle(impPage.getBoundingBox()));
133 PdfArray matrix = impPage.getMatrix();
134 if (matrix == null)
135 dic.put(PdfName.MATRIX, IDENTITYMATRIX);
136 else
137 dic.put(PdfName.MATRIX, matrix);
138 dic.put(PdfName.FORMTYPE, ONE);
139 PRStream stream;
140 if (bout == null) {
141 stream = new PRStream((PRStream)contents, dic);
142 }
143 else {
144 stream = new PRStream(reader, bout);
145 stream.putAll(dic);
146 }
147 return stream;
148 }
149
150 void writeAllVisited() throws IOException {
151 while (!nextRound.isEmpty()) {
152 ArrayList vec = nextRound;
153 nextRound = new ArrayList ();
154 for (int k = 0; k < vec.size(); ++k) {
155 Integer i = (Integer )vec.get(k);
156 if (!visited.containsKey(i)) {
157 visited.put(i, null);
158 int n = i.intValue();
159 writer.addToBody(reader.getPdfObjectRelease(n), myXref[n]);
160 }
161 }
162 }
163 }
164
165 void writeAllPages() throws IOException {
166 try {
167 file.reOpen();
168 for (Iterator it = importedPages.values().iterator(); it.hasNext();) {
169 PdfImportedPage ip = (PdfImportedPage)it.next();
170 writer.addToBody(ip.getFormXObject(), ip.getIndirectReference());
171 }
172 writeAllVisited();
173 }
174 finally {
175 try {
176 reader.close();
177 file.close();
178 }
179 catch (Exception e) {
180 }
182 }
183 }
184 }
185 |
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