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21
22 package org.armedbear.j.mail;
23
24 import gnu.regexp.RE;
25 import gnu.regexp.UncheckedRE;
26 import org.armedbear.j.Buffer;
27 import org.armedbear.j.Debug;
28 import org.armedbear.j.DiffFormatter;
29 import org.armedbear.j.Editor;
30 import org.armedbear.j.FormatTable;
31 import org.armedbear.j.Formatter;
32 import org.armedbear.j.Line;
33 import org.armedbear.j.LineSegmentList;
34 import org.armedbear.j.Utilities;
35
36 public final class MessageFormatter extends Formatter
37 {
38 private static final int MESSAGE_FORMAT_FIRST =
40 DiffFormatter.DIFF_FORMAT_LAST + 1;
41
42 private static final byte MESSAGE_FORMAT_TEXT = MESSAGE_FORMAT_FIRST;
43 private static final byte MESSAGE_FORMAT_COMMENT = MESSAGE_FORMAT_FIRST + 1;
44 private static final byte MESSAGE_FORMAT_HEADER_NAME = MESSAGE_FORMAT_FIRST + 2;
45 private static final byte MESSAGE_FORMAT_HEADER_VALUE = MESSAGE_FORMAT_FIRST + 3;
46 private static final byte MESSAGE_FORMAT_QUOTE = MESSAGE_FORMAT_FIRST + 4;
47 private static final byte MESSAGE_FORMAT_SIGNATURE = MESSAGE_FORMAT_FIRST + 5;
48 private static final byte MESSAGE_FORMAT_DIFF = MESSAGE_FORMAT_FIRST + 6;
49
50 private static final RE quoteRE = new UncheckedRE("^[a-zA-Z]*>");
51
52 private static final RE headerRE = new UncheckedRE("^ *[a-zA-Z\\-/]+:");
54
55 private Line startOfBody;
56
57 private final DiffFormatter diffFormatter;
58
59 public MessageFormatter(Buffer buffer)
60 {
61 this.buffer = buffer;
62 diffFormatter = new DiffFormatter(buffer);
63 }
64
65 public synchronized LineSegmentList formatLine(Line line)
66 {
67 if (line.flags() == MESSAGE_FORMAT_DIFF)
68 return diffFormatter.formatLine(line);
69 final String  text = getDetabbedText(line);
70 clearSegmentList();
71 if (line.flags() == MESSAGE_FORMAT_SIGNATURE) {
72 addSegment(text, MESSAGE_FORMAT_SIGNATURE);
73 return segmentList;
74 }
75 String trim = text.trim();
76 if (trim.length() == 0) {
77 addSegment(text, MESSAGE_FORMAT_TEXT);
79 return segmentList;
80 }
81 if (startOfBody == null || line.lineNumber() < startOfBody.lineNumber()) {
82 if (text.length() > 0) {
84 int i = text.indexOf(':');
85 if (i >= 0 && headerRE.getMatch(text) != null) {
86 String headerName = text.substring(0, i).trim();
87 if (isKeyword(headerName)) {
88 addSegment(text, 0, i+1, MESSAGE_FORMAT_HEADER_NAME);
89 addSegment(text, i+1, MESSAGE_FORMAT_HEADER_VALUE);
90 return segmentList;
91 }
92 }
93 }
94 if (line.flags() == MESSAGE_FORMAT_HEADER_VALUE)
95 addSegment(text, MESSAGE_FORMAT_HEADER_VALUE);
96 else
97 addSegment(text, MESSAGE_FORMAT_COMMENT);
98 return segmentList;
99 }
100 char c = trim.charAt(0);
101 if (c == '>') {
102 if (trim.startsWith(">>>>> ")) {
103 addSegment(text, MESSAGE_FORMAT_TEXT);
105 } else if (trim.startsWith(">From ")) {
106 addSegment(text, MESSAGE_FORMAT_TEXT);
107 } else {
108 addSegment(text, MESSAGE_FORMAT_QUOTE);
109 }
110 return segmentList;
111 }
112 if (quoteRE.getMatch(text) != null) {
113 addSegment(text, MESSAGE_FORMAT_QUOTE);
114 return segmentList;
115 }
116 addSegment(text, MESSAGE_FORMAT_TEXT);
117 return segmentList;
118 }
119
120 public synchronized boolean parseBuffer()
121 {
122 startOfBody = null;
123 boolean inDiff = false;
124 boolean inSig = false;
125 if (buffer.needsRenumbering())
126 buffer.renumber();
127 for (Line line = buffer.getFirstLine(); line != null; line = line.next()) {
128 if (buffer instanceof MessageBuffer) {
129 if (line.lineNumber() == ((MessageBuffer)buffer).getHeaderLineCount()) {
130 if (startOfBody != null)
131 Debug.bug();
132 startOfBody = line;
133 }
134 }
135 String text = line.getText();
136 if (text == null)
137 continue;
138 if (startOfBody == null) {
139 if (buffer instanceof SendMail && text.equals(SendMail.getHeaderSeparator()))
140 startOfBody = line.next();
141 else {
142 int i = text.indexOf(':');
143 if (i >= 0 && headerRE.getMatch(text) != null) {
144 String headerName = text.substring(0, i).trim();
145 if (isKeyword(headerName))
146 line.setFlags(MESSAGE_FORMAT_HEADER_VALUE);
147 else
148 line.setFlags(0);
149 }
150 else if (line.previous() != null)
151 line.setFlags(line.previous().flags());
152 }
153 } else {
154 if (text.equals("-- ")) {
156 inSig = true;
157 inDiff = false;
158 line.setFlags(MESSAGE_FORMAT_SIGNATURE);
159 continue;
160 }
161 if (inDiff) {
162 if (isDiffContinuation(line)) {
163 line.setFlags(MESSAGE_FORMAT_DIFF);
164 continue;
165 }
166 inDiff = false;
167 } else if (isDiffStart(line)) {
169 inDiff = true;
170 line.setFlags(MESSAGE_FORMAT_DIFF);
171 continue;
172 }
173 if (inDiff)
174 Debug.bug();
175 if (inSig) {
176 line.setFlags(MESSAGE_FORMAT_SIGNATURE);
177 continue;
178 }
179 line.setFlags(0);
181 if (text.length() == 0)
182 continue;
183 final char c = text.charAt(0);
184 if (buffer.getLineCount() - line.lineNumber() < 16) {
185 if (c == '_' || c == '-') {
186 text = text.trim();
188 boolean all = true;
189 for (int i = text.length(); i-- > 0;) {
190 if (text.charAt(i) != c) {
191 all = false;
192 break;
193 }
194 }
195 if (all) {
196 inSig = true;
197 line.setFlags(MESSAGE_FORMAT_SIGNATURE);
198 continue;
199 }
200 }
201 }
202 }
203 }
204 buffer.setNeedsParsing(false);
205 return true;
206 }
207
208 public static boolean isDiffStart(Line line)
209 {
210 String text = line.trim();
211 if (text.startsWith("+++ "))
212 return true;
213 if (text.startsWith("--- "))
214 return true;
215 if (text.startsWith("@@ "))
216 return true;
217 if (text.startsWith("@") && text.endsWith("@"))
218 return true;
219 if (text.startsWith("diff ")) {
220 Line nextLine = line.next();
221 if (nextLine != null && nextLine.trim().startsWith("---"))
222 return true;
223 } else if (text.startsWith("Index: ")) {
224 Line nextLine = line.next();
225 if (nextLine != null) {
226 String s = nextLine.trim();
227 if (s.startsWith("diff ") || s.startsWith("========"))
228 return true;
229 }
230 }
231 return false;
232 }
233
234 public static boolean isDiffContinuation(Line line)
235 {
236 if (line.length() == 0)
237 return true;
238 final char c = line.charAt(0);
239 if (c == ' ')
240 return true;
241 if (c == '+')
242 return true;
243 if (c == '-') {
244 Line nextLine = line.next();
245 return (nextLine != null && isDiffContinuation(nextLine));
246 }
247 String text = line.getText();
248 if (text.startsWith("diff "))
249 return true;
250 if (text.startsWith("Index: "))
251 return true;
252 if (text.startsWith("========"))
253 return true;
254 if (text.startsWith("RCS file: "))
255 return true;
256 if (text.startsWith("retrieving "))
257 return true;
258 if (text.startsWith("@@"))
259 return true;
260 if (text.startsWith("@") && text.endsWith("@"))
261 return true;
262 return false;
263 }
264
265 public FormatTable getFormatTable()
266 {
267 if (formatTable == null) {
268 formatTable = diffFormatter.getFormatTable();
269 formatTable.setModeName("MessageMode");
270 formatTable.addEntryFromPrefs(MESSAGE_FORMAT_TEXT, "text");
271 formatTable.addEntryFromPrefs(MESSAGE_FORMAT_COMMENT, "comment");
272 formatTable.addEntryFromPrefs(MESSAGE_FORMAT_HEADER_NAME, "headerName", "keyword");
273 formatTable.addEntryFromPrefs(MESSAGE_FORMAT_HEADER_VALUE, "headerValue", "operator");
274 formatTable.addEntryFromPrefs(MESSAGE_FORMAT_QUOTE, "string");
275 formatTable.addEntryFromPrefs(MESSAGE_FORMAT_SIGNATURE, "signature", "comment");
276 }
277 return formatTable;
278 }
279
280 public void reset()
281 {
282 diffFormatter.reset();
283 super.reset();
284 }
285 }
286 |
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