source: osm/applications/editors/josm/plugins/cadastre-fr/src/cadastre_fr/CadastreInterface.java@ 29784

Last change on this file since 29784 was 29525, checked in by donvip, 12 years ago

[josm_plugins] see #josm8582 - Use Main.removeLayer() everywhere
  • Property svn:eol-style set to native
File size: 26.0 KB
Line 
1// License: GPL. v2 and later. Copyright 2008-2009 by Pieren <pieren3@gmail.com> and others
2package cadastre_fr;
3
4import static org.openstreetmap.josm.tools.I18n.tr;
5
6import java.awt.GridBagLayout;
7import java.io.BufferedReader;
8import java.io.IOException;
9import java.io.InputStreamReader;
10import java.io.OutputStream;
11import java.net.HttpURLConnection;
12import java.net.MalformedURLException;
13import java.net.URL;
14import java.util.Date;
15import java.util.Vector;
16
17import javax.swing.JComboBox;
18import javax.swing.JDialog;
19import javax.swing.JOptionPane;
20import javax.swing.JPanel;
21
22import org.openstreetmap.josm.Main;
23import org.openstreetmap.josm.data.coor.EastNorth;
24import org.openstreetmap.josm.gui.layer.Layer;
25import org.openstreetmap.josm.tools.GBC;
26
27public class CadastreInterface {
28 public boolean downloadCanceled = false;
29 public HttpURLConnection urlConn = null;
30
31 private String cookie;
32 private String interfaceRef = null;
33 private String lastWMSLayerName = null;
34 private URL searchFormURL;
35 private Vector<String> listOfCommunes = new Vector<String>();
36 private Vector<String> listOfTA = new Vector<String>();
37 class PlanImage {
38 String name;
39 String ref;
40 PlanImage(String name, String ref) {
41 this.name = name;
42 this.ref = ref;
43 }
44 }
45 private Vector<PlanImage> listOfFeuilles = new Vector<PlanImage>();
46 private long cookieTimestamp;
47
48 final String baseURL = "http://www.cadastre.gouv.fr";
49 final String cImageFormat = "Cette commune est au format ";
50 final String cCommuneListStart = "<select name=\"codeCommune\"";
51 final String cCommuneListEnd = "</select>";
52 final String c0ptionListStart = "<option value=\"";
53 final String cOptionListEnd = "</option>";
54 final String cBBoxCommunStart = "new GeoBox(";
55 final String cBBoxCommunEnd = ")";
56
57 final String cInterfaceVector = "afficherCarteCommune.do";
58 final String cInterfaceRasterTA = "afficherCarteTa.do";
59 final String cInterfaceRasterFeuille = "afficherCarteFeuille.do";
60 final String cImageLinkStart = "<a href=\"#\" class=\"raster\" onClick=\"popup('afficherCarteFeuille.do?f=";
61 final String cTAImageLinkStart = "<a href=\"#\" class=\"raster\" onClick=\"popup('afficherCarteTa.do?f=";
62 final String cImageNameStart = ">Feuille ";
63 final String cTAImageNameStart = "Tableau d'assemblage <strong>";
64
65 final static long cCookieExpiration = 30 * 60 * 1000; // 30 minutes expressed in milliseconds
66
67 final int cRetriesGetCookie = 10; // 10 times every 3 seconds means 30 seconds trying to get a cookie
68
69 public boolean retrieveInterface(WMSLayer wmsLayer) throws DuplicateLayerException, WMSException {
70 if (wmsLayer.getName().equals(""))
71 return false;
72 boolean isCookieExpired = isCookieExpired();
73 if (wmsLayer.getName().equals(lastWMSLayerName) && !isCookieExpired)
74 return true;
75 if (!wmsLayer.getName().equals(lastWMSLayerName))
76 interfaceRef = null;
77 // open the session with the French Cadastre web front end
78 downloadCanceled = false;
79 try {
80 if (cookie == null || isCookieExpired) {
81 getCookie();
82 interfaceRef = null;
83 }
84 if (cookie == null)
85 throw new WMSException(tr("Cannot open a new client session.\nServer in maintenance or temporary overloaded."));
86 if (interfaceRef == null) {
87 getInterface(wmsLayer);
88 this.lastWMSLayerName = wmsLayer.getName();
89 }
90 openInterface();
91 } catch (IOException e) {
92 JOptionPane.showMessageDialog(Main.parent,
93 tr("Town/city {0} not found or not available\n" +
94 "or action canceled", wmsLayer.getLocation()));
95 return false;
96 }
97 return true;
98 }
99
100 /**
101 *
102 * @return true if a cookie is delivered by WMS and false is WMS is not opening a client session
103 * (too many clients or in maintenance)
104 * @throws IOException
105 */
106 private void getCookie() throws IOException {
107 boolean cookied = false;
108 int retries = cRetriesGetCookie;
109 try {
110 searchFormURL = new URL(baseURL + "/scpc/accueil.do");
111 while (cookied == false && retries > 0) {
112 urlConn = (HttpURLConnection)searchFormURL.openConnection();
113 urlConn.setRequestProperty("Connection", "close");
114 urlConn.setRequestMethod("GET");
115 urlConn.connect();
116 if (urlConn.getResponseCode() == HttpURLConnection.HTTP_OK) {
117 System.out.println("GET "+searchFormURL);
118 BufferedReader in = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
119 while(in.readLine() != null) {} // read the buffer otherwise we sent POST too early
120 String headerName=null;
121 for (int i=1; (headerName = urlConn.getHeaderFieldKey(i))!=null; i++) {
122 if (headerName.equals("Set-Cookie")) {
123 cookie = urlConn.getHeaderField(i);
124 cookie = cookie.substring(0, cookie.indexOf(";"));
125 cookieTimestamp = new Date().getTime();
126 System.out.println("received cookie=" + cookie + " at " + new Date(cookieTimestamp));
127 cookied = true;
128 }
129 }
130 } else {
131 System.out.println("Request to home page failed. Http error:"+urlConn.getResponseCode()+". Try again "+retries+" times");
132 CadastrePlugin.safeSleep(3000);
133 retries --;
134 }
135 }
136 } catch (MalformedURLException e) {
137 throw (IOException) new IOException(
138 "Illegal url.").initCause(e);
139 }
140 }
141
142 public void resetCookie() {
143 lastWMSLayerName = null;
144 cookie = null;
145 }
146
147 public boolean isCookieExpired() {
148 long now = new Date().getTime();
149 if ((now - cookieTimestamp) > cCookieExpiration) {
150 System.out.println("cookie received at "+new Date(cookieTimestamp)+" expired (now is "+new Date(now)+")");
151 return true;
152 }
153 return false;
154 }
155
156 public void resetInterfaceRefIfNewLayer(String newWMSLayerName) {
157 if (!newWMSLayerName.equals(lastWMSLayerName)) {
158 interfaceRef = null;
159 cookie = null; // new since WMS server requires that we come back to the main form
160 }
161 }
162
163 public void setCookie() {
164 this.urlConn.setRequestProperty("Cookie", this.cookie);
165 }
166
167 public void setCookie(HttpURLConnection urlConn) {
168 urlConn.setRequestProperty("Cookie", this.cookie);
169 }
170
171 private void getInterface(WMSLayer wmsLayer) throws IOException, DuplicateLayerException {
172 // first attempt : search for given name without codeCommune
173 interfaceRef = postForm(wmsLayer, "");
174 // second attempt either from known codeCommune (e.g. from cache) or from ComboBox
175 if (interfaceRef == null) {
176 if (!wmsLayer.getCodeCommune().equals("")) {
177 // codeCommune is already known (from previous request or from cache on disk)
178 interfaceRef = postForm(wmsLayer, wmsLayer.getCodeCommune());
179 } else {
180 if (listOfCommunes.size() > 1) {
181 // commune unknown, prompt the list of communes from
182 // server and try with codeCommune
183 String selected = selectMunicipalityDialog(wmsLayer);
184 if (selected != null) {
185 String newCodeCommune = selected.substring(1, selected.indexOf(">")-2);
186 String newLocation = selected.substring(selected.indexOf(">")+1, selected.lastIndexOf(" - "));
187 wmsLayer.setCodeCommune(newCodeCommune);
188 wmsLayer.setLocation(newLocation);
189 Main.pref.put("cadastrewms.codeCommune", newCodeCommune);
190 Main.pref.put("cadastrewms.location", newLocation);
191 }
192 checkLayerDuplicates(wmsLayer);
193 interfaceRef = postForm(wmsLayer, wmsLayer.getCodeCommune());
194 }
195 if (listOfCommunes.size() == 1 && wmsLayer.isRaster()) {
196 // commune known but raster format. Select "Feuille" (non-georeferenced image) from list.
197 int res = selectFeuilleDialog();
198 if (res != -1) {
199 wmsLayer.setCodeCommune(listOfFeuilles.elementAt(res).name);
200 checkLayerDuplicates(wmsLayer);
201 interfaceRef = buildRasterFeuilleInterfaceRef(wmsLayer.getCodeCommune());
202 }
203 }
204 }
205 }
206
207 if (interfaceRef == null)
208 throw new IOException("Town/city " + wmsLayer.getLocation() + " not found.");
209 }
210
211 private void openInterface() throws IOException {
212 try {
213 // finally, open the interface on server side giving access to the wms server
214 String lines = null;
215 String ln = null;
216 URL interfaceURL = new URL(baseURL + "/scpc/"+interfaceRef);
217 urlConn = (HttpURLConnection)interfaceURL.openConnection();
218 urlConn.setRequestMethod("GET");
219 setCookie();
220 urlConn.connect();
221 if (urlConn.getResponseCode() != HttpURLConnection.HTTP_OK) {
222 throw new IOException("Cannot open Cadastre interface. GET response:"+urlConn.getResponseCode());
223 }
224 System.out.println("GET "+interfaceURL);
225 BufferedReader in = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
226 // read the buffer otherwise we sent POST too early
227 while ((ln = in.readLine()) != null) {
228 lines += ln;
229 }
230 } catch (MalformedURLException e) {
231 throw (IOException) new IOException(
232 "CadastreGrabber: Illegal url.").initCause(e);
233 }
234 }
235
236 /**
237 * Post the form with the commune name and check the returned answer which is embedded
238 * in HTTP XML packets. This function doesn't use an XML parser yet but that would be a good idea
239 * for the next releases.
240 * Two possibilities :
241 * - either the commune name matches and we receive an URL starting with "afficherCarteCommune.do" or
242 * - we don't receive a single answer but a list of possible values. This answer looks like:
243 * <select name="codeCommune" class="long erreur" id="codeCommune">
244 * <option value="">Choisir</option>
245 * <option value="50061" >COLMARS - 04370</option>
246 * <option value="QK066" >COLMAR - 68000</option>
247 * </select>
248 * The returned string is the interface name used in further requests, e.g. "afficherCarteCommune.do?c=QP224"
249 * where QP224 is the code commune known by the WMS (or "afficherCarteTa.do?c=..." for raster images).
250 *
251 * @param location
252 * @param codeCommune
253 * @return retURL url to available code commune in the cadastre; "" if not found
254 * @throws IOException
255 */
256 private String postForm(WMSLayer wmsLayer, String codeCommune) throws IOException {
257 try {
258 String ln = null;
259 String lines = null;
260 listOfCommunes.clear();
261 listOfTA.clear();
262 // send a POST request with a city/town/village name
263 String content = "numerovoie=";
264 content += "&indiceRepetition=";
265 content += "&nomvoie=";
266 content += "&lieuDit=";
267 if (codeCommune == "") {
268 content += "&ville=" + new String(java.net.URLEncoder.encode(wmsLayer.getLocation(), "UTF-8"));
269 content += "&codePostal=";
270 } else {
271 content += "&codeCommune=" + codeCommune;
272 }
273 content += "&codeDepartement=";
274 content += wmsLayer.getDepartement();
275 content += "&nbResultatParPage=10";
276 content += "&x=0&y=0";
277 searchFormURL = new URL(baseURL + "/scpc/rechercherPlan.do");
278 urlConn = (HttpURLConnection)searchFormURL.openConnection();
279 urlConn.setRequestMethod("POST");
280 urlConn.setDoOutput(true);
281 urlConn.setDoInput(true);
282 setCookie();
283 OutputStream wr = urlConn.getOutputStream();
284 wr.write(content.getBytes());
285 System.out.println("POST "+content);
286 wr.flush();
287 wr.close();
288 BufferedReader rd = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
289 while ((ln = rd.readLine()) != null) {
290 lines += ln;
291 }
292 rd.close();
293 urlConn.disconnect();
294 if (lines != null) {
295 if (lines.indexOf(cImageFormat) != -1) {
296 int i = lines.indexOf(cImageFormat);
297 int j = lines.indexOf(".", i);
298 wmsLayer.setRaster(lines.substring(i+cImageFormat.length(), j).equals("image"));
299 }
300 if (!wmsLayer.isRaster() && lines.indexOf(cInterfaceVector) != -1) { // "afficherCarteCommune.do"
301 // shall be something like: interfaceRef = "afficherCarteCommune.do?c=X2269";
302 lines = lines.substring(lines.indexOf(cInterfaceVector),lines.length());
303 lines = lines.substring(0, lines.indexOf("'"));
304 System.out.println("interface ref.:"+lines);
305 return lines;
306 } else if (wmsLayer.isRaster() && lines.indexOf(cInterfaceRasterTA) != -1) { // "afficherCarteTa.do"
307 // list of values parsed in listOfFeuilles (list all non-georeferenced images)
308 lines = getFeuillesList();
309 if (!downloadCanceled) {
310 parseFeuillesList(lines);
311 if (listOfFeuilles.size() > 0) {
312 int res = selectFeuilleDialog();
313 if (res != -1) {
314 wmsLayer.setCodeCommune(listOfFeuilles.elementAt(res).name);
315 checkLayerDuplicates(wmsLayer);
316 interfaceRef = buildRasterFeuilleInterfaceRef(wmsLayer.getCodeCommune());
317 wmsLayer.setCodeCommune(listOfFeuilles.elementAt(res).ref);
318 lines = buildRasterFeuilleInterfaceRef(listOfFeuilles.elementAt(res).ref);
319 System.out.println("interface ref.:"+lines);
320 return lines;
321 }
322 }
323 }
324 return null;
325 } else if (lines.indexOf(cCommuneListStart) != -1 && lines.indexOf(cCommuneListEnd) != -1) {
326 // list of values parsed in listOfCommunes
327 int i = lines.indexOf(cCommuneListStart);
328 int j = lines.indexOf(cCommuneListEnd, i);
329 parseCommuneList(lines.substring(i, j));
330 }
331 }
332 } catch (MalformedURLException e) {
333 throw (IOException) new IOException(
334 "Illegal url.").initCause(e);
335 } catch (Exception e){
336 e.printStackTrace();
337 }
338 return null;
339 }
340
341 private void parseCommuneList(String input) {
342 if (input.indexOf(c0ptionListStart) != -1) {
343 while (input.indexOf("<option value=\"") != -1) {
344 int i = input.indexOf(c0ptionListStart);
345 int j = input.indexOf(cOptionListEnd, i+c0ptionListStart.length());
346 int k = input.indexOf("\"", i+c0ptionListStart.length());
347 if (j != -1 && k > (i + c0ptionListStart.length())) {
348 String lov = new String(input.substring(i+c0ptionListStart.length()-1, j));
349 if (lov.indexOf(">") != -1) {
350 System.out.println("parse "+lov);
351 listOfCommunes.add(lov);
352 } else
353 System.err.println("unable to parse commune string:"+lov);
354 }
355 input = input.substring(j+cOptionListEnd.length());
356 }
357 }
358 }
359
360 private String getFeuillesList() {
361 // get all images in one html page
362 String ln = null;
363 String lines = null;
364 HttpURLConnection urlConn2 = null;
365 try {
366 URL getAllImagesURL = new URL(baseURL + "/scpc/listerFeuillesParcommune.do?keepVolatileSession=&offset=2000");
367 urlConn2 = (HttpURLConnection)getAllImagesURL.openConnection();
368 setCookie(urlConn2);
369 urlConn2.connect();
370 System.out.println("GET "+getAllImagesURL);
371 BufferedReader rd = new BufferedReader(new InputStreamReader(urlConn2.getInputStream()));
372 while ((ln = rd.readLine()) != null) {
373 lines += ln;
374 }
375 rd.close();
376 urlConn2.disconnect();
377 //System.out.println("GET="+lines);
378 } catch (IOException e) {
379 listOfFeuilles.clear();
380 e.printStackTrace();
381 }
382 return lines;
383 }
384
385 private void parseFeuillesList(String input) {
386 listOfFeuilles.clear();
387 // get "Tableau d'assemblage"
388 String inputTA = input;
389 if (Main.pref.getBoolean("cadastrewms.useTA", false)) {
390 while (inputTA.indexOf(cTAImageLinkStart) != -1) {
391 inputTA = inputTA.substring(inputTA.indexOf(cTAImageLinkStart) + cTAImageLinkStart.length());
392 String refTA = inputTA.substring(0, inputTA.indexOf("'"));
393 String nameTA = inputTA.substring(inputTA.indexOf(cTAImageNameStart) + cTAImageNameStart.length());
394 nameTA = nameTA.substring(0, nameTA.indexOf("<"));
395 listOfFeuilles.add(new PlanImage(nameTA, refTA));
396 }
397 }
398 // get "Feuilles"
399 while (input.indexOf(cImageLinkStart) != -1) {
400 input = input.substring(input.indexOf(cImageLinkStart)+cImageLinkStart.length());
401 String refFeuille = input.substring(0, input.indexOf("'"));
402 String nameFeuille = input.substring(
403 input.indexOf(cImageNameStart)+cImageNameStart.length(),
404 input.indexOf(" -"));
405 listOfFeuilles.add(new PlanImage(nameFeuille, refFeuille));
406 }
407 }
408
409 private String selectMunicipalityDialog(WMSLayer wmsLayer) {
410 JPanel p = new JPanel(new GridBagLayout());
411 String[] communeList = new String[listOfCommunes.size() + 1];
412 communeList[0] = tr("Choose from...");
413 for (int i = 0; i < listOfCommunes.size(); i++) {
414 communeList[i + 1] = listOfCommunes.elementAt(i).substring(listOfCommunes.elementAt(i).indexOf(">")+1);
415 }
416 JComboBox inputCommuneList = new JComboBox(communeList);
417 p.add(inputCommuneList, GBC.eol().fill(GBC.HORIZONTAL).insets(10, 0, 0, 0));
418 JOptionPane pane = new JOptionPane(p, JOptionPane.INFORMATION_MESSAGE, JOptionPane.OK_CANCEL_OPTION, null) {
419 private static final long serialVersionUID = 1L;
420 };
421 //pane.createDialog(Main.parent, tr("Select commune")).setVisible(true);
422 // this below is a temporary workaround to fix the "always on top" issue
423 JDialog dialog = pane.createDialog(Main.parent, tr("Select commune"));
424 CadastrePlugin.prepareDialog(dialog);
425 dialog.setVisible(true);
426 // till here
427 if (!Integer.valueOf(JOptionPane.OK_OPTION).equals(pane.getValue()))
428 return null;
429 return listOfCommunes.elementAt(inputCommuneList.getSelectedIndex()-1);
430 }
431
432 private int selectFeuilleDialog() {
433 JPanel p = new JPanel(new GridBagLayout());
434 Vector<String> ImageNames = new Vector<String>();
435 for (PlanImage src : listOfFeuilles) {
436 ImageNames.add(src.name);
437 }
438 JComboBox inputFeuilleList = new JComboBox(ImageNames);
439 p.add(inputFeuilleList, GBC.eol().fill(GBC.HORIZONTAL).insets(10, 0, 0, 0));
440 JOptionPane pane = new JOptionPane(p, JOptionPane.INFORMATION_MESSAGE, JOptionPane.OK_CANCEL_OPTION, null);
441 //pane.createDialog(Main.parent, tr("Select Feuille")).setVisible(true);
442 // this below is a temporary workaround to fix the "always on top" issue
443 JDialog dialog = pane.createDialog(Main.parent, tr("Select Feuille"));
444 CadastrePlugin.prepareDialog(dialog);
445 dialog.setVisible(true);
446 // till here
447 if (!Integer.valueOf(JOptionPane.OK_OPTION).equals(pane.getValue()))
448 return -1;
449 int result = inputFeuilleList.getSelectedIndex();
450 return result;
451 }
452
453 private String buildRasterFeuilleInterfaceRef(String codeCommune) {
454 return cInterfaceRasterFeuille + "?f=" + codeCommune;
455 }
456
457 /**
458 * Retrieve the bounding box size in pixels of the whole commune (point 0,0 at top, left corner)
459 * and store it in given wmsLayer
460 * In case of raster image, we also check in the same http request if the image is already georeferenced
461 * and store the result in the wmsLayer as well.
462 * @param wmsLayer the WMSLayer where the commune data and images are stored
463 * @throws IOException
464 */
465 public void retrieveCommuneBBox(WMSLayer wmsLayer) throws IOException {
466 if (interfaceRef == null)
467 return;
468 String ln = null;
469 String line = null;
470 // send GET opening normally the small window with the commune overview
471 String content = baseURL + "/scpc/" + interfaceRef;
472 content += "&dontSaveLastForward&keepVolatileSession=";
473 searchFormURL = new URL(content);
474 urlConn = (HttpURLConnection)searchFormURL.openConnection();
475 urlConn.setRequestMethod("GET");
476 setCookie();
477 urlConn.connect();
478 if (urlConn.getResponseCode() != HttpURLConnection.HTTP_OK) {
479 throw new IOException("Cannot get Cadastre response.");
480 }
481 System.out.println("GET "+searchFormURL);
482 BufferedReader in = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
483 while ((ln = in.readLine()) != null) {
484 line += ln;
485 }
486 in.close();
487 urlConn.disconnect();
488 parseBBoxCommune(wmsLayer, line);
489 if (wmsLayer.isRaster() && !wmsLayer.isAlreadyGeoreferenced()) {
490 parseGeoreferences(wmsLayer, line);
491 }
492 }
493
494 private void parseBBoxCommune(WMSLayer wmsLayer, String input) {
495 if (input.indexOf(cBBoxCommunStart) != -1) {
496 input = input.substring(input.indexOf(cBBoxCommunStart));
497 int i = input.indexOf(",");
498 double minx = Double.parseDouble(input.substring(cBBoxCommunStart.length(), i));
499 int j = input.indexOf(",", i+1);
500 double miny = Double.parseDouble(input.substring(i+1, j));
501 int k = input.indexOf(",", j+1);
502 double maxx = Double.parseDouble(input.substring(j+1, k));
503 int l = input.indexOf(cBBoxCommunEnd, k+1);
504 double maxy = Double.parseDouble(input.substring(k+1, l));
505 wmsLayer.setCommuneBBox( new EastNorthBound(new EastNorth(minx,miny), new EastNorth(maxx,maxy)));
506 }
507 }
508
509 private void parseGeoreferences(WMSLayer wmsLayer, String input) {
510 if (input.lastIndexOf(cBBoxCommunStart) != -1) {
511 input = input.substring(input.lastIndexOf(cBBoxCommunStart));
512 input = input.substring(input.indexOf(cBBoxCommunEnd)+cBBoxCommunEnd.length());
513 int i = input.indexOf(",");
514 int j = input.indexOf(",", i+1);
515 String str = input.substring(i+1, j);
516 double unknown_yet = tryParseDouble(str);
517 int j_ = input.indexOf(",", j+1);
518 double angle = Double.parseDouble(input.substring(j+1, j_));
519 int k = input.indexOf(",", j_+1);
520 double scale_origin = Double.parseDouble(input.substring(j_+1, k));
521 int l = input.indexOf(",", k+1);
522 double dpi = Double.parseDouble(input.substring(k+1, l));
523 int m = input.indexOf(",", l+1);
524 double fX = Double.parseDouble(input.substring(l+1, m));
525 int n = input.indexOf(",", m+1);
526 double fY = Double.parseDouble(input.substring(m+1, n));
527 int o = input.indexOf(",", n+1);
528 double X0 = Double.parseDouble(input.substring(n+1, o));
529 int p = input.indexOf(",", o+1);
530 double Y0 = Double.parseDouble(input.substring(o+1, p));
531 if (X0 != 0.0 && Y0 != 0) {
532 wmsLayer.setAlreadyGeoreferenced(true);
533 wmsLayer.fX = fX;
534 wmsLayer.fY = fY;
535 wmsLayer.angle = angle;
536 wmsLayer.X0 = X0;
537 wmsLayer.Y0 = Y0;
538 }
539 System.out.println("parse georef:"+unknown_yet+","+angle+","+scale_origin+","+dpi+","+fX+","+
540 fY+","+X0+","+Y0);
541 }
542 }
543
544 private double tryParseDouble(String str) {
545 try {
546 return Double.parseDouble(str);
547 } catch (NumberFormatException e) {
548 return 0;
549 }
550 }
551
552 private void checkLayerDuplicates(WMSLayer wmsLayer) throws DuplicateLayerException {
553 if (Main.map != null) {
554 for (Layer l : Main.map.mapView.getAllLayers()) {
555 if (l instanceof WMSLayer && l.getName().equals(wmsLayer.getName()) && (l != wmsLayer)) {
556 System.out.println("Try to grab into a new layer when "+wmsLayer.getName()+" is already opened.");
557 // remove the duplicated layer
558 Main.main.removeLayer(wmsLayer);
559 throw new DuplicateLayerException();
560 }
561 }
562 }
563 }
564
565 public void cancel() {
566 if (urlConn != null) {
567 urlConn.setConnectTimeout(1);
568 urlConn.setReadTimeout(1);
569 //urlConn.disconnect();
570 }
571 downloadCanceled = true;
572 lastWMSLayerName = null;
573 }
574
575}
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