Commit | Line | Data |
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a7393a71 RK |
1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
2 | * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
3 | * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
23cd2dcc | 4 | |
41e2dba2 | 5 | // Get the best-available objects for indexedDB and requestAnimationFrame. |
3d99a6fd | 6 | window.indexedDB = window.indexedDB || window.webkitIndexedDB || window.mozIndexedDB || window.msIndexedDB; |
41e2dba2 | 7 | window.requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame; |
993fd081 | 8 | |
41e2dba2 | 9 | var mainDB; |
16e4f664 | 10 | var gAppInitDone = false; |
7a549148 | 11 | var gUIHideCountdown = 0; |
4b1d0915 | 12 | var gWaitCounter = 0; |
68afcd96 | 13 | var gAction, gActionLabel; |
c4d0569c | 14 | var gOSMAPIURL = "http://api.openstreetmap.org/"; |
7a549148 | 15 | |
b47b4a65 | 16 | window.onload = function() { |
68afcd96 RK |
17 | gAction = document.getElementById("action"); |
18 | gActionLabel = document.getElementById("actionlabel"); | |
19 | ||
b47b4a65 RK |
20 | var mSel = document.getElementById("mapSelector"); |
21 | for (var mapStyle in gMapStyles) { | |
22 | var opt = document.createElement("option"); | |
23 | opt.value = mapStyle; | |
24 | opt.text = gMapStyles[mapStyle].name; | |
25 | mSel.add(opt, null); | |
26 | } | |
23cd2dcc | 27 | |
ecde0af2 | 28 | var areas = document.getElementsByClassName("overlayArea"); |
7a549148 RK |
29 | for (var i = 0; i <= areas.length - 1; i++) { |
30 | areas[i].addEventListener("mouseup", uiEvHandler, false); | |
31 | areas[i].addEventListener("mousemove", uiEvHandler, false); | |
32 | areas[i].addEventListener("mousedown", uiEvHandler, false); | |
33 | areas[i].addEventListener("mouseout", uiEvHandler, false); | |
34 | ||
35 | areas[i].addEventListener("touchstart", uiEvHandler, false); | |
36 | areas[i].addEventListener("touchmove", uiEvHandler, false); | |
37 | areas[i].addEventListener("touchend", uiEvHandler, false); | |
38 | areas[i].addEventListener("touchcancel", uiEvHandler, false); | |
39 | areas[i].addEventListener("touchleave", uiEvHandler, false); | |
40 | } | |
41 | ||
1222624d RK |
42 | document.getElementById("body").addEventListener("keydown", uiEvHandler, false); |
43 | ||
8e901dce | 44 | if (navigator.platform.length == "") { |
b91b74a7 RK |
45 | // For Firefox OS, don't display the "save" button. |
46 | // Do this by setting the debugHide class for testing in debug mode. | |
47 | document.getElementById("saveTrackButton").classList.add("debugHide"); | |
c4d0569c RK |
48 | } |
49 | ||
43255174 RK |
50 | // Without OAuth, the login data is useless |
51 | //document.getElementById("uploadSettingsArea").classList.remove("debugHide"); | |
52 | // As login data is useless for now, always enable upload button | |
53 | document.getElementById("uploadTrackButton").disabled = false; | |
54 | ||
c4d0569c | 55 | if (gDebug) { |
43255174 | 56 | // Note that GPX upload returns an error 500 on the dev API right now. |
c4d0569c | 57 | gOSMAPIURL = "http://api06.dev.openstreetmap.org/"; |
b91b74a7 | 58 | } |
7a549148 | 59 | |
582d50fc RK |
60 | gAction.addEventListener("dbinit-done", initMap, false); |
61 | gAction.addEventListener("mapinit-done", postInit, false); | |
62 | console.log("starting DB init..."); | |
993fd081 | 63 | initDB(); |
582d50fc | 64 | } |
4b1d0915 | 65 | |
582d50fc RK |
66 | function postInit(aEvent) { |
67 | gAction.removeEventListener(aEvent.type, postInit, false); | |
68 | console.log("init done, draw map."); | |
69 | gMapPrefsLoaded = true; | |
16e4f664 | 70 | gAppInitDone = true; |
14acbcf7 RK |
71 | //gMap.resizeAndDraw(); <-- HACK: This triggers bug 1001853, work around with a delay. |
72 | window.setTimeout(gMap.resizeAndDraw, 100); | |
582d50fc RK |
73 | gActionLabel.textContent = ""; |
74 | gAction.style.display = "none"; | |
75 | setTracking(document.getElementById("trackCheckbox")); | |
76 | gPrefs.get(gDebug ? "osm_dev_user" : "osm_user", function(aValue) { | |
77 | if (aValue) { | |
78 | document.getElementById("uploadUser").value = aValue; | |
79 | document.getElementById("uploadTrackButton").disabled = false; | |
4b1d0915 | 80 | } |
582d50fc RK |
81 | }); |
82 | gPrefs.get(gDebug ? "osm_dev_pwd" : "osm_pwd", function(aValue) { | |
83 | var upwd = document.getElementById("uploadPwd"); | |
84 | if (aValue) | |
85 | document.getElementById("uploadPwd").value = aValue; | |
86 | }); | |
b47b4a65 RK |
87 | } |
88 | ||
89 | window.onresize = function() { | |
ac6286bd | 90 | gMap.resizeAndDraw(); |
b47b4a65 RK |
91 | } |
92 | ||
582d50fc | 93 | function initDB(aEvent) { |
993fd081 | 94 | // Open DB. |
582d50fc RK |
95 | if (aEvent) |
96 | gAction.removeEventListener(aEvent.type, initDB, false); | |
1222624d | 97 | var request = window.indexedDB.open("MainDB-lantea", 2); |
993fd081 RK |
98 | request.onerror = function(event) { |
99 | // Errors can be handled here. Error codes explain in: | |
100 | // https://developer.mozilla.org/en/IndexedDB/IDBDatabaseException#Constants | |
915d4271 RK |
101 | if (gDebug) |
102 | console.log("error opening mainDB: " + event.target.errorCode); | |
993fd081 RK |
103 | }; |
104 | request.onsuccess = function(event) { | |
993fd081 | 105 | mainDB = request.result; |
582d50fc RK |
106 | var throwEv = new CustomEvent("dbinit-done"); |
107 | gAction.dispatchEvent(throwEv); | |
993fd081 RK |
108 | }; |
109 | request.onupgradeneeded = function(event) { | |
110 | mainDB = request.result; | |
a8634d37 | 111 | var ver = mainDB.version || 0; // version is empty string for a new DB |
915d4271 RK |
112 | if (gDebug) |
113 | console.log("mainDB has version " + ver + ", upgrade needed."); | |
114 | if (!mainDB.objectStoreNames.contains("prefs")) { | |
a8634d37 RK |
115 | // Create a "prefs" objectStore. |
116 | var prefsStore = mainDB.createObjectStore("prefs"); | |
915d4271 RK |
117 | } |
118 | if (!mainDB.objectStoreNames.contains("track")) { | |
a8634d37 RK |
119 | // Create a "track" objectStore. |
120 | var trackStore = mainDB.createObjectStore("track", {autoIncrement: true}); | |
121 | } | |
915d4271 | 122 | if (!mainDB.objectStoreNames.contains("tilecache")) { |
a8634d37 RK |
123 | // Create a "tilecache" objectStore. |
124 | var tilecacheStore = mainDB.createObjectStore("tilecache"); | |
125 | } | |
993fd081 RK |
126 | mainDB.onversionchange = function(event) { |
127 | mainDB.close(); | |
128 | mainDB = undefined; | |
129 | initDB(); | |
130 | }; | |
131 | }; | |
132 | } | |
133 | ||
7a549148 RK |
134 | function showUI() { |
135 | if (gUIHideCountdown <= 0) { | |
136 | var areas = document.getElementsByClassName('overlayArea'); | |
137 | for (var i = 0; i <= areas.length - 1; i++) { | |
138 | areas[i].classList.remove("hidden"); | |
139 | } | |
140 | setTimeout(maybeHideUI, 1000); | |
141 | } | |
142 | gUIHideCountdown = 5; | |
143 | } | |
144 | ||
145 | function maybeHideUI() { | |
146 | gUIHideCountdown--; | |
147 | if (gUIHideCountdown <= 0) { | |
148 | var areas = document.getElementsByClassName('overlayArea'); | |
149 | for (var i = 0; i <= areas.length - 1; i++) { | |
150 | areas[i].classList.add("hidden"); | |
151 | } | |
152 | } | |
153 | else { | |
154 | setTimeout(maybeHideUI, 1000); | |
155 | } | |
156 | } | |
157 | ||
993fd081 RK |
158 | function toggleTrackArea() { |
159 | var fs = document.getElementById("trackArea"); | |
160 | if (fs.style.display != "block") { | |
161 | fs.style.display = "block"; | |
7a549148 | 162 | showUI(); |
993fd081 RK |
163 | } |
164 | else { | |
165 | fs.style.display = "none"; | |
166 | } | |
167 | } | |
168 | ||
b47b4a65 | 169 | function toggleSettings() { |
993fd081 | 170 | var fs = document.getElementById("settingsArea"); |
b47b4a65 RK |
171 | if (fs.style.display != "block") { |
172 | fs.style.display = "block"; | |
7a549148 | 173 | showUI(); |
b47b4a65 RK |
174 | } |
175 | else { | |
176 | fs.style.display = "none"; | |
177 | } | |
178 | } | |
99631a75 | 179 | |
c5378747 RK |
180 | function toggleFullscreen() { |
181 | if ((document.fullScreenElement && document.fullScreenElement !== null) || | |
182 | (document.mozFullScreenElement && document.mozFullScreenElement !== null) || | |
183 | (document.webkitFullScreenElement && document.webkitFullScreenElement !== null)) { | |
184 | if (document.cancelFullScreen) { | |
185 | document.cancelFullScreen(); | |
186 | } else if (document.mozCancelFullScreen) { | |
187 | document.mozCancelFullScreen(); | |
188 | } else if (document.webkitCancelFullScreen) { | |
189 | document.webkitCancelFullScreen(); | |
190 | } | |
191 | } | |
192 | else { | |
193 | var elem = document.getElementById("body"); | |
194 | if (elem.requestFullScreen) { | |
195 | elem.requestFullScreen(); | |
196 | } else if (elem.mozRequestFullScreen) { | |
197 | elem.mozRequestFullScreen(); | |
198 | } else if (elem.webkitRequestFullScreen) { | |
199 | elem.webkitRequestFullScreen(); | |
200 | } | |
201 | } | |
202 | } | |
203 | ||
43255174 RK |
204 | function showUploadDialog() { |
205 | var dia = document.getElementById("dialogArea"); | |
206 | var areas = dia.children; | |
207 | for (var i = 0; i <= areas.length - 1; i++) { | |
208 | areas[i].style.display = "none"; | |
209 | } | |
210 | document.getElementById("uploadDialog").style.display = "block"; | |
211 | document.getElementById("uploadTrackButton").disabled = true; | |
212 | dia.classList.remove("hidden"); | |
213 | } | |
214 | ||
ecde0af2 RK |
215 | function showGLWarningDialog() { |
216 | var dia = document.getElementById("dialogArea"); | |
217 | var areas = dia.children; | |
218 | for (var i = 0; i <= areas.length - 1; i++) { | |
219 | areas[i].style.display = "none"; | |
220 | } | |
221 | document.getElementById("noGLwarning").style.display = "block"; | |
222 | dia.classList.remove("hidden"); | |
223 | } | |
224 | ||
43255174 RK |
225 | function cancelDialog() { |
226 | document.getElementById("dialogArea").classList.add("hidden"); | |
227 | document.getElementById("uploadTrackButton").disabled = false; | |
228 | } | |
229 | ||
7a549148 RK |
230 | var uiEvHandler = { |
231 | handleEvent: function(aEvent) { | |
232 | var touchEvent = aEvent.type.indexOf('touch') != -1; | |
233 | ||
234 | switch (aEvent.type) { | |
235 | case "mousedown": | |
236 | case "touchstart": | |
237 | case "mousemove": | |
238 | case "touchmove": | |
239 | case "mouseup": | |
240 | case "touchend": | |
1222624d | 241 | case "keydown": |
7a549148 RK |
242 | showUI(); |
243 | break; | |
244 | } | |
245 | } | |
246 | }; | |
247 | ||
8389557a RK |
248 | function setUploadField(aField) { |
249 | switch (aField.id) { | |
250 | case "uploadUser": | |
c4d0569c | 251 | gPrefs.set(gDebug ? "osm_dev_user" : "osm_user", aField.value); |
8389557a RK |
252 | document.getElementById("uploadTrackButton").disabled = !aField.value.length; |
253 | break; | |
254 | case "uploadPwd": | |
c4d0569c | 255 | gPrefs.set(gDebug ? "osm_dev_pwd" : "osm_pwd", aField.value); |
8389557a RK |
256 | break; |
257 | } | |
258 | } | |
259 | ||
99631a75 RK |
260 | function makeISOString(aTimestamp) { |
261 | // ISO time format is YYYY-MM-DDTHH:mm:ssZ | |
262 | var tsDate = new Date(aTimestamp); | |
362a6833 | 263 | // Note that .getUTCMonth() returns a number between 0 and 11 (0 for January)! |
99631a75 | 264 | return tsDate.getUTCFullYear() + "-" + |
362a6833 | 265 | (tsDate.getUTCMonth() < 9 ? "0" : "") + (tsDate.getUTCMonth() + 1 ) + "-" + |
99631a75 RK |
266 | (tsDate.getUTCDate() < 10 ? "0" : "") + tsDate.getUTCDate() + "T" + |
267 | (tsDate.getUTCHours() < 10 ? "0" : "") + tsDate.getUTCHours() + ":" + | |
268 | (tsDate.getUTCMinutes() < 10 ? "0" : "") + tsDate.getUTCMinutes() + ":" + | |
269 | (tsDate.getUTCSeconds() < 10 ? "0" : "") + tsDate.getUTCSeconds() + "Z"; | |
270 | } | |
271 | ||
8389557a RK |
272 | function convertTrack(aTargetFormat) { |
273 | var out = ""; | |
274 | switch (aTargetFormat) { | |
275 | case "gpx": | |
276 | out += '<?xml version="1.0" encoding="UTF-8" ?>' + "\n\n"; | |
277 | out += '<gpx version="1.0" creator="Lantea" xmlns="http://www.topografix.com/GPX/1/0">' + "\n"; | |
278 | if (gTrack.length) { | |
279 | out += ' <trk>' + "\n"; | |
993fd081 | 280 | out += ' <trkseg>' + "\n"; |
8389557a RK |
281 | for (var i = 0; i < gTrack.length; i++) { |
282 | if (gTrack[i].beginSegment && i > 0) { | |
283 | out += ' </trkseg>' + "\n"; | |
284 | out += ' <trkseg>' + "\n"; | |
285 | } | |
286 | out += ' <trkpt lat="' + gTrack[i].coords.latitude + '" lon="' + | |
287 | gTrack[i].coords.longitude + '">' + "\n"; | |
288 | if (gTrack[i].coords.altitude) { | |
289 | out += ' <ele>' + gTrack[i].coords.altitude + '</ele>' + "\n"; | |
290 | } | |
291 | out += ' <time>' + makeISOString(gTrack[i].time) + '</time>' + "\n"; | |
292 | out += ' </trkpt>' + "\n"; | |
293 | } | |
294 | out += ' </trkseg>' + "\n"; | |
295 | out += ' </trk>' + "\n"; | |
993fd081 | 296 | } |
8389557a RK |
297 | out += '</gpx>' + "\n"; |
298 | break; | |
299 | case "json": | |
300 | out = JSON.stringify(gTrack); | |
301 | break; | |
302 | default: | |
303 | break; | |
304 | } | |
305 | return out; | |
306 | } | |
307 | ||
308 | function saveTrack() { | |
309 | if (gTrack.length) { | |
310 | var outDataURI = "data:application/gpx+xml," + | |
311 | encodeURIComponent(convertTrack("gpx")); | |
99631a75 RK |
312 | window.open(outDataURI, 'GPX Track'); |
313 | } | |
314 | } | |
993fd081 | 315 | |
4b12da3a RK |
316 | function saveTrackDump() { |
317 | if (gTrack.length) { | |
8389557a RK |
318 | var outDataURI = "data:application/json," + |
319 | encodeURIComponent(convertTrack("json")); | |
4b12da3a RK |
320 | window.open(outDataURI, 'JSON dump'); |
321 | } | |
322 | } | |
323 | ||
8389557a | 324 | function uploadTrack() { |
6ddefbf9 | 325 | // Hide all areas in the dialog. |
43255174 RK |
326 | var dia = document.getElementById("dialogArea"); |
327 | var areas = dia.children; | |
328 | for (var i = 0; i <= areas.length - 1; i++) { | |
329 | areas[i].style.display = "none"; | |
330 | } | |
6ddefbf9 RK |
331 | // Reset all the fields in the status area. |
332 | document.getElementById("uploadStatusCloseButton").disabled = true; | |
333 | document.getElementById("uploadInProgress").style.display = "block"; | |
334 | document.getElementById("uploadSuccess").style.display = "none"; | |
d0c62ee0 | 335 | document.getElementById("uploadFailed").style.display = "none"; |
6ddefbf9 | 336 | document.getElementById("uploadError").style.display = "none"; |
d0c62ee0 | 337 | document.getElementById("uploadErrorMsg").textContent = ""; |
6ddefbf9 | 338 | // Now show the status area. |
43255174 RK |
339 | document.getElementById("uploadStatus").style.display = "block"; |
340 | ||
8389557a | 341 | // See http://wiki.openstreetmap.org/wiki/Api06#Uploading_traces |
43255174 RK |
342 | var trackBlob = new Blob([convertTrack("gpx")], |
343 | { "type" : "application/gpx+xml" }); | |
8389557a RK |
344 | var formData = new FormData(); |
345 | formData.append("file", trackBlob); | |
43255174 RK |
346 | var desc = document.getElementById("uploadDesc").value; |
347 | formData.append("description", | |
348 | desc.length ? desc : "Track recorded via Lantea Maps"); | |
8389557a | 349 | //formData.append("tags", ""); |
43255174 RK |
350 | formData.append("visibility", |
351 | document.getElementById("uploadVisibility").value); | |
0494a6db RK |
352 | // Do an empty POST request first, so that we don't send everything, |
353 | // then ask for credentials, and then send again. | |
354 | var hXHR = new XMLHttpRequest(); | |
355 | hXHR.onreadystatechange = function() { | |
fdaf08db | 356 | if (hXHR.readyState == 4 && (hXHR.status == 200 || hXHR.status == 400)) { |
0494a6db RK |
357 | // 400 is Bad Request, but that's expected as this was empty. |
358 | // So far so good, init actual upload. | |
359 | var XHR = new XMLHttpRequest(); | |
360 | XHR.onreadystatechange = function() { | |
361 | if (XHR.readyState == 4 && XHR.status == 200) { | |
362 | // Everthing looks fine. | |
363 | reportUploadStatus(true); | |
364 | } else if (XHR.readyState == 4 && XHR.status != 200) { | |
365 | // Fetched the wrong page or network error... | |
366 | reportUploadStatus(false); | |
367 | } | |
368 | }; | |
369 | XHR.open("POST", gOSMAPIURL + "api/0.6/gpx/create", true); | |
370 | // Cross-Origin XHR doesn't allow username/password (HTTP Auth). | |
371 | // So, we'll ask the user for entering credentials with rather ugly UI. | |
372 | XHR.withCredentials = true; | |
373 | try { | |
374 | XHR.send(formData); // Send actual form data. | |
375 | } | |
376 | catch (e) { | |
377 | reportUploadStatus(false, e); | |
378 | } | |
379 | } else if (hXHR.readyState == 4 && hXHR.status != 200) { | |
380 | // Fetched the wrong page or network error... | |
8389557a RK |
381 | reportUploadStatus(false); |
382 | } | |
383 | }; | |
0494a6db | 384 | hXHR.open("POST", gOSMAPIURL + "api/0.6/gpx/create", true); |
43255174 RK |
385 | // Cross-Origin XHR doesn't allow username/password (HTTP Auth). |
386 | // So, we'll ask the user for entering credentials with rather ugly UI. | |
0494a6db | 387 | hXHR.withCredentials = true; |
8389557a | 388 | try { |
0494a6db | 389 | hXHR.send(); // Empty request, see above. |
8389557a RK |
390 | } |
391 | catch (e) { | |
392 | reportUploadStatus(false, e); | |
393 | } | |
394 | } | |
395 | ||
396 | function reportUploadStatus(aSuccess, aMessage) { | |
43255174 RK |
397 | document.getElementById("uploadStatusCloseButton").disabled = false; |
398 | document.getElementById("uploadInProgress").style.display = "none"; | |
399 | if (aSuccess) { | |
400 | document.getElementById("uploadSuccess").style.display = "block"; | |
401 | } | |
402 | else if (aMessage) { | |
403 | document.getElementById("uploadErrorMsg").textContent = aMessage; | |
404 | document.getElementById("uploadError").style.display = "block"; | |
405 | } | |
406 | else { | |
407 | document.getElementById("uploadFailed").style.display = "block"; | |
408 | } | |
8389557a RK |
409 | } |
410 | ||
993fd081 RK |
411 | var gPrefs = { |
412 | objStore: "prefs", | |
413 | ||
414 | get: function(aKey, aCallback) { | |
415 | if (!mainDB) | |
416 | return; | |
417 | var transaction = mainDB.transaction([this.objStore]); | |
418 | var request = transaction.objectStore(this.objStore).get(aKey); | |
419 | request.onsuccess = function(event) { | |
420 | aCallback(request.result, event); | |
421 | }; | |
422 | request.onerror = function(event) { | |
423 | // Errors can be handled here. | |
424 | aCallback(undefined, event); | |
425 | }; | |
426 | }, | |
427 | ||
428 | set: function(aKey, aValue, aCallback) { | |
429 | if (!mainDB) | |
430 | return; | |
431 | var success = false; | |
d4ccddb8 | 432 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
993fd081 | 433 | var objStore = transaction.objectStore(this.objStore); |
3610c22d | 434 | var request = objStore.put(aValue, aKey); |
993fd081 RK |
435 | request.onsuccess = function(event) { |
436 | success = true; | |
437 | if (aCallback) | |
438 | aCallback(success, event); | |
439 | }; | |
440 | request.onerror = function(event) { | |
441 | // Errors can be handled here. | |
442 | if (aCallback) | |
443 | aCallback(success, event); | |
444 | }; | |
445 | }, | |
446 | ||
447 | unset: function(aKey, aCallback) { | |
448 | if (!mainDB) | |
449 | return; | |
450 | var success = false; | |
d4ccddb8 | 451 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
993fd081 RK |
452 | var request = transaction.objectStore(this.objStore).delete(aKey); |
453 | request.onsuccess = function(event) { | |
454 | success = true; | |
455 | if (aCallback) | |
456 | aCallback(success, event); | |
457 | }; | |
458 | request.onerror = function(event) { | |
459 | // Errors can be handled here. | |
460 | if (aCallback) | |
461 | aCallback(success, event); | |
462 | } | |
463 | } | |
464 | }; | |
465 | ||
466 | var gTrackStore = { | |
467 | objStore: "track", | |
468 | ||
469 | getList: function(aCallback) { | |
470 | if (!mainDB) | |
471 | return; | |
472 | var transaction = mainDB.transaction([this.objStore]); | |
473 | var objStore = transaction.objectStore(this.objStore); | |
474 | if (objStore.getAll) { // currently Mozilla-specific | |
475 | objStore.getAll().onsuccess = function(event) { | |
476 | aCallback(event.target.result); | |
477 | }; | |
478 | } | |
479 | else { // Use cursor (standard method). | |
480 | var tPoints = []; | |
481 | objStore.openCursor().onsuccess = function(event) { | |
482 | var cursor = event.target.result; | |
483 | if (cursor) { | |
484 | tPoints.push(cursor.value); | |
485 | cursor.continue(); | |
486 | } | |
487 | else { | |
488 | aCallback(tPoints); | |
489 | } | |
490 | }; | |
491 | } | |
492 | }, | |
493 | ||
6ddefbf9 RK |
494 | getListStepped: function(aCallback) { |
495 | if (!mainDB) | |
496 | return; | |
497 | var transaction = mainDB.transaction([this.objStore]); | |
498 | var objStore = transaction.objectStore(this.objStore); | |
499 | // Use cursor in reverse direction (so we get the most recent position first) | |
500 | objStore.openCursor(null, "prev").onsuccess = function(event) { | |
501 | var cursor = event.target.result; | |
502 | if (cursor) { | |
503 | aCallback(cursor.value); | |
504 | cursor.continue(); | |
505 | } | |
506 | else { | |
507 | aCallback(null); | |
508 | } | |
509 | }; | |
510 | }, | |
511 | ||
993fd081 RK |
512 | push: function(aValue, aCallback) { |
513 | if (!mainDB) | |
514 | return; | |
d4ccddb8 | 515 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
993fd081 RK |
516 | var objStore = transaction.objectStore(this.objStore); |
517 | var request = objStore.add(aValue); | |
518 | request.onsuccess = function(event) { | |
519 | if (aCallback) | |
520 | aCallback(request.result, event); | |
521 | }; | |
522 | request.onerror = function(event) { | |
523 | // Errors can be handled here. | |
524 | if (aCallback) | |
525 | aCallback(false, event); | |
526 | }; | |
527 | }, | |
528 | ||
529 | clear: function(aCallback) { | |
530 | if (!mainDB) | |
531 | return; | |
532 | var success = false; | |
d4ccddb8 | 533 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
993fd081 RK |
534 | var request = transaction.objectStore(this.objStore).clear(); |
535 | request.onsuccess = function(event) { | |
536 | success = true; | |
537 | if (aCallback) | |
538 | aCallback(success, event); | |
539 | }; | |
540 | request.onerror = function(event) { | |
541 | // Errors can be handled here. | |
542 | if (aCallback) | |
543 | aCallback(success, event); | |
544 | } | |
545 | } | |
546 | }; |