source: josm/trunk/src/org/openstreetmap/josm/tools/TextTagParser.java@ 9073

Last change on this file since 9073 was 9073, checked in by Don-vip, 10 years ago

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File size: 11.9 KB
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1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.tools;
3
4import static org.openstreetmap.josm.tools.I18n.tr;
5import static org.openstreetmap.josm.tools.I18n.trn;
6
7import java.awt.GridBagLayout;
8import java.util.Arrays;
9import java.util.HashMap;
10import java.util.Map;
11import java.util.Map.Entry;
12import java.util.regex.Matcher;
13import java.util.regex.Pattern;
14
15import javax.swing.JLabel;
16import javax.swing.JOptionPane;
17import javax.swing.JPanel;
18
19import org.openstreetmap.josm.Main;
20import org.openstreetmap.josm.gui.ExtendedDialog;
21import org.openstreetmap.josm.gui.help.HelpUtil;
22import org.openstreetmap.josm.gui.widgets.UrlLabel;
23import org.openstreetmap.josm.io.XmlWriter;
24import org.openstreetmap.josm.tools.LanguageInfo.LocaleType;
25
26/**
27 * Class that helps to parse tags from arbitrary text
28 */
29public final class TextTagParser {
30
31 // properties need JOSM restart to apply, modified rarely enough
32 private static final int MAX_KEY_LENGTH = Main.pref.getInteger("tags.paste.max-key-length", 50);
33 private static final int MAX_KEY_COUNT = Main.pref.getInteger("tags.paste.max-key-count", 30);
34 private static final String KEY_PATTERN = Main.pref.get("tags.paste.tag-pattern", "[0-9a-zA-Z:_]*");
35 private static final int MAX_VALUE_LENGTH = 255;
36
37 private TextTagParser() {
38 // Hide default constructor for utils classes
39 }
40
41 public static class TextAnalyzer {
42 private boolean quotesStarted;
43 private boolean esc;
44 private StringBuilder s = new StringBuilder(200);
45 private int pos;
46 private String data;
47 private int n;
48
49 public TextAnalyzer(String text) {
50 pos = 0;
51 data = text;
52 n = data.length();
53 }
54
55 /**
56 * Read tags from "Free format"
57 * @return map of tags
58 */
59 private Map<String, String> getFreeParsedTags() {
60 String k, v;
61 Map<String, String> tags = new HashMap<>();
62
63 while (true) {
64 skipEmpty();
65 if (pos == n) {
66 break;
67 }
68 k = parseString("\n\r\t= ");
69 if (pos == n) {
70 tags.clear();
71 break;
72 }
73 skipSign();
74 if (pos == n) {
75 tags.clear();
76 break;
77 }
78 v = parseString("\n\r\t ");
79 tags.put(k, v);
80 }
81 return tags;
82 }
83
84 private String parseString(String stopChars) {
85 char[] stop = stopChars.toCharArray();
86 Arrays.sort(stop);
87 char c;
88 while (pos < n) {
89 c = data.charAt(pos);
90 if (esc) {
91 esc = false;
92 s.append(c); // \" \\
93 } else if (c == '\\') {
94 esc = true;
95 } else if (c == '\"' && !quotesStarted) { // opening "
96 if (!s.toString().trim().isEmpty()) { // we had ||some text"||
97 s.append(c); // just add ", not open
98 } else {
99 s.delete(0, s.length()); // forget that empty characthers and start reading "....
100 quotesStarted = true;
101 }
102 } else if (c == '\"' && quotesStarted) { // closing "
103 quotesStarted = false;
104 pos++;
105 break;
106 } else if (!quotesStarted && (Arrays.binarySearch(stop, c) >= 0)) {
107 // stop-symbol found
108 pos++;
109 break;
110 } else {
111 // skip non-printable characters
112 if (c >= 32) s.append(c);
113 }
114 pos++;
115 }
116
117 String res = s.toString();
118 s.delete(0, s.length());
119 return res.trim();
120 }
121
122 private void skipSign() {
123 char c;
124 boolean signFound = false;
125 while (pos < n) {
126 c = data.charAt(pos);
127 if (c == '\t' || c == '\n' || c == ' ') {
128 pos++;
129 } else if (c == '=') {
130 if (signFound) break; // a = =qwerty means "a"="=qwerty"
131 signFound = true;
132 pos++;
133 } else {
134 break;
135 }
136 }
137 }
138
139 private void skipEmpty() {
140 char c;
141 while (pos < n) {
142 c = data.charAt(pos);
143 if (c == '\t' || c == '\n' || c == '\r' || c == ' ') {
144 pos++;
145 } else {
146 break;
147 }
148 }
149 }
150 }
151
152 protected static String unescape(String k) {
153 if (!(k.startsWith("\"") && k.endsWith("\""))) {
154 if (k.contains("=")) {
155 // '=' not in quotes will be treated as an error!
156 return null;
157 } else {
158 return k;
159 }
160 }
161 String text = k.substring(1, k.length()-1);
162 return (new TextAnalyzer(text)).parseString("\r\t\n");
163 }
164
165 /**
166 * Try to find tag-value pairs in given text
167 * @param text - text in which tags are looked for
168 * @param splitRegex - text is splitted into parts with this delimiter
169 * @param tagRegex - each part is matched against this regex
170 * @param unescapeTextInQuotes - if true, matched tag and value will be analyzed more thoroughly
171 * @return map of tags
172 */
173 public static Map<String, String> readTagsByRegexp(String text, String splitRegex, String tagRegex, boolean unescapeTextInQuotes) {
174 String[] lines = text.split(splitRegex);
175 Pattern p = Pattern.compile(tagRegex);
176 Map<String, String> tags = new HashMap<>();
177 String k = null, v = null;
178 for (String line: lines) {
179 if (line.trim().isEmpty()) continue; // skip empty lines
180 Matcher m = p.matcher(line);
181 if (m.matches()) {
182 k = m.group(1).trim();
183 v = m.group(2).trim();
184 if (unescapeTextInQuotes) {
185 k = unescape(k);
186 v = unescape(v);
187 if (k == null || v == null) return null;
188 }
189 tags.put(k, v);
190 } else {
191 return null;
192 }
193 }
194 if (!tags.isEmpty()) {
195 return tags;
196 } else {
197 return null;
198 }
199 }
200
201 public static Map<String, String> getValidatedTagsFromText(String buf) {
202 Map<String, String> tags = readTagsFromText(buf);
203 return validateTags(tags) ? tags : null;
204 }
205
206 /**
207 * Apply different methods to extract tag-value pairs from arbitrary text
208 * @param buf buffer
209 * @return null if no format is suitable
210 */
211 public static Map<String, String> readTagsFromText(String buf) {
212 Map<String, String> tags;
213
214 // Format
215 // tag1\tval1\ntag2\tval2\n
216 tags = readTagsByRegexp(buf, "[\\r\\n]+", ".*?([a-zA-Z0-9:_]+).*\\t(.*?)", false);
217 // try "tag\tvalue\n" format
218 if (tags != null) return tags;
219
220 // Format
221 // a=b \n c=d \n "a b"=hello
222 // SORRY: "a=b" = c is not supported fror now, only first = will be considered
223 // a = "b=c" is OK
224 // a = b=c - this method of parsing fails intentionally
225 tags = readTagsByRegexp(buf, "[\\n\\t\\r]+", "(.*?)=(.*?)", true);
226 // try format t1=v1\n t2=v2\n ...
227 if (tags != null) return tags;
228
229 // JSON-format
230 String bufJson = buf.trim();
231 // trim { }, if there are any
232 if (bufJson.startsWith("{") && bufJson.endsWith("}"))
233 bufJson = bufJson.substring(1, bufJson.length()-1);
234 tags = readTagsByRegexp(bufJson, "[\\s]*,[\\s]*",
235 "[\\s]*(\\\".*?[^\\\\]\\\")"+"[\\s]*:[\\s]*"+"(\\\".*?[^\\\\]\\\")[\\s]*", true);
236 if (tags != null) return tags;
237
238 // Free format
239 // a 1 "b" 2 c=3 d 4 e "5"
240 return new TextAnalyzer(buf).getFreeParsedTags();
241 }
242
243 /**
244 * Check tags for correctness and display warnings if needed
245 * @param tags - map key-&gt;value to check
246 * @return true if the tags should be pasted
247 */
248 public static boolean validateTags(Map<String, String> tags) {
249 int r;
250 int s = tags.size();
251 if (s > MAX_KEY_COUNT) {
252 // Use trn() even if for english it makes no sense, as s > 30
253 r = warning(trn("There was {0} tag found in the buffer, it is suspicious!",
254 "There were {0} tags found in the buffer, it is suspicious!", s,
255 s), "", "tags.paste.toomanytags");
256 if (r == 2 || r == 3) return false; if (r == 4) return true;
257 }
258 for (Entry<String, String> entry : tags.entrySet()) {
259 String key = entry.getKey();
260 String value = entry.getValue();
261 if (key.length() > MAX_KEY_LENGTH) {
262 r = warning(tr("Key is too long (max {0} characters):", MAX_KEY_LENGTH), key+'='+value, "tags.paste.keytoolong");
263 if (r == 2 || r == 3) return false; if (r == 4) return true;
264 }
265 if (!key.matches(KEY_PATTERN)) {
266 r = warning(tr("Suspicious characters in key:"), key, "tags.paste.keydoesnotmatch");
267 if (r == 2 || r == 3) return false; if (r == 4) return true;
268 }
269 if (value.length() > MAX_VALUE_LENGTH) {
270 r = warning(tr("Value is too long (max {0} characters):", MAX_VALUE_LENGTH), value, "tags.paste.valuetoolong");
271 if (r == 2 || r == 3) return false; if (r == 4) return true;
272 }
273 }
274 return true;
275 }
276
277 private static int warning(String text, String data, String code) {
278 ExtendedDialog ed = new ExtendedDialog(
279 Main.parent,
280 tr("Do you want to paste these tags?"),
281 new String[]{tr("Ok"), tr("Cancel"), tr("Clear buffer"), tr("Ignore warnings")});
282 ed.setButtonIcons(new String[]{"ok", "cancel", "dialogs/delete", "pastetags"});
283 ed.setContent("<html><b>"+text + "</b><br/><br/><div width=\"300px\">"+XmlWriter.encode(data, true)+"</html>");
284 ed.setDefaultButton(2);
285 ed.setCancelButton(2);
286 ed.setIcon(JOptionPane.WARNING_MESSAGE);
287 ed.toggleEnable(code);
288 ed.showDialog();
289 int r = ed.getValue();
290 if (r == 0) r = 2;
291 // clean clipboard if user asked
292 if (r == 3) Utils.copyToClipboard("");
293 return r;
294 }
295
296 /**
297 * Shows message that the buffer can not be pasted, allowing user to clean the buffer
298 * @param helpTopic the help topic of the parent action
299 * TODO: Replace by proper HelpAwareOptionPane instead of self-made help link
300 */
301 public static void showBadBufferMessage(String helpTopic) {
302 String msg = tr("<html><p> Sorry, it is impossible to paste tags from buffer. It does not contain any JOSM object"
303 + " or suitable text. </p></html>");
304 JPanel p = new JPanel(new GridBagLayout());
305 p.add(new JLabel(msg), GBC.eop());
306 String helpUrl = HelpUtil.getHelpTopicUrl(HelpUtil.buildAbsoluteHelpTopic(helpTopic, LocaleType.DEFAULT));
307 if (helpUrl != null) {
308 p.add(new UrlLabel(helpUrl), GBC.eop());
309 }
310
311 ExtendedDialog ed = new ExtendedDialog(
312 Main.parent,
313 tr("Warning"),
314 new String[]{tr("Ok"), tr("Clear buffer")});
315
316 ed.setButtonIcons(new String[]{"ok", "dialogs/delete"});
317
318 ed.setContent(p);
319 ed.setDefaultButton(1);
320 ed.setCancelButton(1);
321 ed.setIcon(JOptionPane.WARNING_MESSAGE);
322 ed.toggleEnable("tags.paste.cleanbadbuffer");
323 ed.showDialog();
324
325 int r = ed.getValue();
326 // clean clipboard if user asked
327 if (r == 2) Utils.copyToClipboard("");
328 }
329}
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