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1 package com.icl.saxon.output;
2 import com.icl.saxon.*;
3 import com.icl.saxon.sort.HashMap;
4 import java.io.*;
5 import org.xml.sax.Attributes  ;
6 import javax.xml.transform.TransformerException ;
7
8
17
18
19 public class HTMLIndenter extends ProxyEmitter {
20
21 private int level = 0;
22 private int indentSpaces = 3;
23 private String indentChars = " ";
24 private boolean sameLine = false;
25 private boolean isInlineTag = false;
26 private boolean inFormattedTag = false;
27 private boolean afterInline = false;
28 private boolean afterFormatted = true;
30
31
34 private static String [] inlineTags = {
35 "tt", "i", "b", "u", "s", "strike", "big", "small", "em", "strong", "dfn", "code", "samp",
36 "kbd", "var", "cite", "abbr", "acronym", "a", "img", "applet", "object", "font",
37 "basefont", "br", "script", "map", "q", "sub", "sup", "span", "bdo", "iframe", "input",
38 "select", "textarea", "label", "button" };
39
40 private static HashMap inlineTable = new HashMap(203);
41
42 static {
43 for (int j=0; j<inlineTags.length; j++) {
44 inlineTable.set(inlineTags[j]);
45 }
46 }
47
48 private static boolean isInline(String tag) {
49 return inlineTable.get(tag);
50 }
51
52
54 private static HashMap formattedTable = new HashMap(51);
55
56 static {
57 formattedTable.set("pre");
58 formattedTable.set("script");
59 formattedTable.set("style");
60 formattedTable.set("textarea");
61 formattedTable.set("xmp"); }
63
64 private static boolean isFormatted(String tag) {
65 return formattedTable.get(tag);
66 }
67
68
69
70 public HTMLIndenter() {}
71
72
73
76
77 public void startDocument() throws TransformerException {
78 super.startDocument();
79 String s = outputProperties.getProperty(SaxonOutputKeys.INDENT_SPACES);
80 if (s==null) {
81 indentSpaces = 3;
82 } else {
83 try {
84 indentSpaces = Integer.parseInt(s);
85 } catch (Exception err) {
86 indentSpaces = 3;
87 }
88 }
89 }
90
91
94
95 public void startElement(int nameCode, Attributes atts,
96 int[] namespaces, int nscount) throws TransformerException {
97 String tag = namePool.getDisplayName(nameCode);
98 isInlineTag = isInline(tag);
99 inFormattedTag = inFormattedTag || isFormatted(tag);
100 if (!isInlineTag && !inFormattedTag &&
101 !afterInline && !afterFormatted) {
102 indent();
103 }
104
105
106 super.startElement(nameCode, atts, namespaces, nscount);
107 level++;
108 sameLine = true;
109 afterInline = false;
110 afterFormatted = false;
111 }
112
113
116
117 public void endElement(int nameCode) throws TransformerException {
118 level--;
119 String tag = namePool.getDisplayName(nameCode);
120 boolean thisInline = isInline(tag);
121 boolean thisFormatted = isFormatted(tag);
122 if (!thisInline && !thisFormatted && !afterInline &&
123 !sameLine && !afterFormatted && !inFormattedTag) {
124 indent();
125 afterInline = false;
126 afterFormatted = false;
127 } else {
128 afterInline = thisInline;
129 afterFormatted = thisFormatted;
130 }
131 super.endElement(nameCode);
132 inFormattedTag = inFormattedTag && !thisFormatted;
133 sameLine = false;
134 }
135
136
139
140 public void processingInstruction(String target, String data) throws TransformerException {
141 super.processingInstruction(target, data);
142 }
143
144
147
148 public void characters(char[] chars, int start, int len) throws TransformerException {
149 if (inFormattedTag) {
150 super.characters(chars, start, len);
151 } else {
152 int lastNL = start;
153
154 for (int i=start; i<start+len; i++) {
155 if (chars[i]=='\n' || (i-lastNL > 120 && chars[i]==' ')) {
156 sameLine = false;
157 super.characters(chars, lastNL, i-lastNL);
158 indent();
159 lastNL = i+1;
160 while (lastNL<len && chars[lastNL]==' ') lastNL++;
161 }
162 }
163 if (lastNL<start+len) {
164 super.characters(chars, lastNL, start+len-lastNL);
165 }
166 }
167 afterInline = false;
168 }
169
170
173
174 public void ignorableWhitespace(char[] chars, int start, int len) throws TransformerException {
175 }
177
178
181
182 public void comment(char[] chars, int start, int len) throws TransformerException {
183 indent();
184 super.comment(chars, start, len);
185 }
186
187
190
191 public void endDocument() throws TransformerException {
192 super.endDocument();
193 }
194
195
198
199 private void indent() throws TransformerException {
200 int spaces = level * indentSpaces;
201 while (spaces > indentChars.length()) {
202 indentChars += indentChars;
203 }
204 char[] array = new char[spaces + 1];
205 array[0] = '\n';
206 indentChars.getChars(0, spaces, array, 1);
207 super.characters(array, 0, spaces+1);
208 sameLine = false;
209 }
210
211 };
212
213
232 |
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