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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 | |
4b12da3a | 5 | var gCanvas, gContext, gGeolocation; |
a6b11e47 | 6 | var gDebug = false; |
23cd2dcc RK |
7 | |
8 | var gTileSize = 256; | |
9 | var gMaxZoom = 18; // The minimum is 0. | |
10 | ||
b47b4a65 RK |
11 | var gMapStyles = { |
12 | // OSM tile usage policy: http://wiki.openstreetmap.org/wiki/Tile_usage_policy | |
55c4a0b7 | 13 | // Find some more OSM ones at http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Tile_servers |
b47b4a65 RK |
14 | osm_mapnik: |
15 | {name: "OpenStreetMap (Mapnik)", | |
16 | url: "http://tile.openstreetmap.org/{z}/{x}/{y}.png", | |
17 | copyright: 'Map data and imagery © <a href="http://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>'}, | |
14e6d3ad RK |
18 | osm_cyclemap: |
19 | {name: "Cycle Map (OSM)", | |
20 | url: "http://[a-c].tile.opencyclemap.org/cycle/{z}/{x}/{y}.png", | |
21 | copyright: 'Map data and imagery © <a href="http://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>'}, | |
22 | osm_transmap: | |
23 | {name: "Transport Map (OSM)", | |
24 | url: "http://[a-c].tile2.opencyclemap.org/transport/{z}/{x}/{y}.png", | |
b47b4a65 RK |
25 | copyright: 'Map data and imagery © <a href="http://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>'}, |
26 | mapquest_open: | |
55c4a0b7 | 27 | {name: "MapQuest OSM", |
b47b4a65 | 28 | url: "http://otile1.mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.png", |
55c4a0b7 RK |
29 | copyright: 'Data, imagery and map information provided by MapQuest, <a href="http://www.openstreetmap.org/">OpenStreetMap</a> and contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>.'}, |
30 | mapquest_aerial: | |
31 | {name: "MapQuest Open Aerial", | |
32 | url: "http://oatile1.mqcdn.com/naip/{z}/{x}/{y}.png", | |
33 | copyright: 'Data, imagery and map information provided by MapQuest, <a href="http://www.openstreetmap.org/">OpenStreetMap</a> and contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>.'}, | |
34 | google_map: | |
35 | {name: "Google Maps", | |
36 | url: " http://mt1.google.com/vt/x={x}&y={y}&z={z}", | |
37 | copyright: 'Map data and imagery © <a href="http://maps.google.com/">Google</a>'}, | |
b47b4a65 RK |
38 | }; |
39 | var gActiveMap = "osm_mapnik"; | |
23cd2dcc RK |
40 | |
41 | var gPos = {x: 35630000.0, // Current position in the map in pixels at the maximum zoom level (18) | |
42 | y: 23670000.0, // The range is 0-67108864 (2^gMaxZoom * gTileSize) | |
b395419b | 43 | z: 5}; // This could be fractional if supported being between zoom levels. |
23cd2dcc RK |
44 | |
45 | var gLastMouseX = 0; | |
46 | var gLastMouseY = 0; | |
b395419b | 47 | var gZoomFactor; |
23cd2dcc | 48 | |
3610c22d RK |
49 | // Used as an associative array. |
50 | // The keys have to be strings, ours will be "xindex,yindex,zindex" e.g. "13,245,12". | |
23cd2dcc | 51 | var gTiles = {}; |
b395419b | 52 | var gLoadingTile; |
23cd2dcc | 53 | |
3610c22d RK |
54 | var gMapPrefsLoaded = false; |
55 | ||
23cd2dcc | 56 | var gDragging = false; |
4b12da3a | 57 | var gDragTouchID; |
23cd2dcc | 58 | |
55c4a0b7 RK |
59 | var gGeoWatchID; |
60 | var gTrack = []; | |
14e6d3ad | 61 | var gLastTrackPoint, gLastDrawnPoint; |
05c21757 | 62 | var gCenterPosition = true; |
55c4a0b7 | 63 | |
b47b4a65 | 64 | function initMap() { |
4b12da3a | 65 | gGeolocation = navigator.geolocation; |
23cd2dcc RK |
66 | gCanvas = document.getElementById("map"); |
67 | gContext = gCanvas.getContext("2d"); | |
b47b4a65 RK |
68 | if (!gActiveMap) |
69 | gActiveMap = "osm_mapnik"; | |
23cd2dcc | 70 | |
4b12da3a RK |
71 | //gDebug = true; |
72 | if (gDebug) { | |
73 | gGeolocation = geofake; | |
74 | var hiddenList = document.getElementsByClassName("debugHide"); | |
75 | // last to first - list of elements with that class is changing! | |
76 | for (var i = hiddenList.length - 1; i >= 0; i--) { | |
77 | hiddenList[i].classList.remove("debugHide"); | |
78 | } | |
79 | } | |
80 | ||
3610c22d RK |
81 | var loopCnt = 0; |
82 | var getPersistentPrefs = function() { | |
83 | if (mainDB) { | |
84 | gPrefs.get("position", function(aValue) { | |
85 | if (aValue) { | |
86 | gPos = aValue; | |
87 | drawMap(); | |
88 | } | |
89 | }); | |
90 | gPrefs.get("center_map", function(aValue) { | |
91 | if (aValue === undefined) | |
92 | document.getElementById("centerCheckbox").checked = true; | |
93 | else | |
94 | document.getElementById("centerCheckbox").checked = aValue; | |
95 | setCentering(document.getElementById("centerCheckbox")); | |
96 | }); | |
97 | gPrefs.get("tracking_enabled", function(aValue) { | |
98 | if (aValue === undefined) | |
99 | document.getElementById("trackCheckbox").checked = true; | |
100 | else | |
101 | document.getElementById("trackCheckbox").checked = aValue; | |
102 | setTracking(document.getElementById("trackCheckbox")); | |
103 | }); | |
104 | gMapPrefsLoaded = true; | |
105 | } | |
106 | else | |
107 | setTimeout(getPersistentPrefs, 100); | |
108 | loopCnt++; | |
109 | if (loopCnt > 20) { | |
110 | gMapPrefsLoaded = true; | |
111 | return; | |
112 | } | |
113 | }; | |
114 | getPersistentPrefs(); | |
115 | ||
23cd2dcc RK |
116 | gCanvas.addEventListener("mouseup", mapEvHandler, false); |
117 | gCanvas.addEventListener("mousemove", mapEvHandler, false); | |
118 | gCanvas.addEventListener("mousedown", mapEvHandler, false); | |
119 | gCanvas.addEventListener("mouseout", mapEvHandler, false); | |
120 | ||
121 | gCanvas.addEventListener("touchstart", mapEvHandler, false); | |
122 | gCanvas.addEventListener("touchmove", mapEvHandler, false); | |
123 | gCanvas.addEventListener("touchend", mapEvHandler, false); | |
124 | gCanvas.addEventListener("touchcancel", mapEvHandler, false); | |
125 | gCanvas.addEventListener("touchleave", mapEvHandler, false); | |
126 | ||
6de10e15 | 127 | // XXX deprecated? see https://groups.google.com/forum/?fromgroups#!topic/mozilla.dev.planning/kuhrORubaRY[1-25] |
23cd2dcc RK |
128 | gCanvas.addEventListener("DOMMouseScroll", mapEvHandler, false); |
129 | gCanvas.addEventListener("mousewheel", mapEvHandler, false); | |
130 | ||
b47b4a65 RK |
131 | document.getElementById("copyright").innerHTML = |
132 | gMapStyles[gActiveMap].copyright; | |
b395419b RK |
133 | |
134 | gLoadingTile = new Image(); | |
135 | gLoadingTile.src = "style/loading.png"; | |
23cd2dcc RK |
136 | } |
137 | ||
138 | function resizeAndDraw() { | |
321359cd RK |
139 | var viewportWidth = Math.min(window.innerWidth, window.outerWidth); |
140 | var viewportHeight = Math.min(window.innerHeight, window.outerHeight); | |
23cd2dcc | 141 | |
6b1e7340 RK |
142 | var canvasWidth = viewportWidth - 2; |
143 | var canvasHeight = viewportHeight - 2; | |
23cd2dcc RK |
144 | gCanvas.style.position = "fixed"; |
145 | gCanvas.width = canvasWidth; | |
146 | gCanvas.height = canvasHeight; | |
147 | drawMap(); | |
7a549148 | 148 | showUI(); |
23cd2dcc RK |
149 | } |
150 | ||
151 | function zoomIn() { | |
152 | if (gPos.z < gMaxZoom) { | |
153 | gPos.z++; | |
154 | drawMap(); | |
155 | } | |
156 | } | |
157 | ||
158 | function zoomOut() { | |
159 | if (gPos.z > 0) { | |
160 | gPos.z--; | |
161 | drawMap(); | |
162 | } | |
163 | } | |
164 | ||
55c4a0b7 RK |
165 | function gps2xy(aLatitude, aLongitude) { |
166 | var maxZoomFactor = Math.pow(2, gMaxZoom) * gTileSize; | |
167 | var convLat = aLatitude * Math.PI / 180; | |
168 | var rawY = (1 - Math.log(Math.tan(convLat) + | |
169 | 1 / Math.cos(convLat)) / Math.PI) / 2 * maxZoomFactor; | |
170 | var rawX = (aLongitude + 180) / 360 * maxZoomFactor; | |
171 | return {x: Math.round(rawX), | |
172 | y: Math.round(rawY)}; | |
173 | } | |
174 | ||
175 | function xy2gps(aX, aY) { | |
176 | var maxZoomFactor = Math.pow(2, gMaxZoom) * gTileSize; | |
177 | var n = Math.PI - 2 * Math.PI * aY / maxZoomFactor; | |
178 | return {latitude: 180 / Math.PI * | |
179 | Math.atan(0.5 * (Math.exp(n) - Math.exp(-n))), | |
180 | longitude: aX / maxZoomFactor * 360 - 180}; | |
181 | } | |
182 | ||
b47b4a65 RK |
183 | function setMapStyle() { |
184 | var mapSel = document.getElementById("mapSelector"); | |
185 | if (mapSel.selectedIndex >= 0 && gActiveMap != mapSel.value) { | |
186 | gActiveMap = mapSel.value; | |
187 | gTiles = {}; | |
95f49ba7 RK |
188 | document.getElementById("copyright").innerHTML = |
189 | gMapStyles[gActiveMap].copyright; | |
b5c85133 | 190 | showUI(); |
b47b4a65 RK |
191 | drawMap(); |
192 | } | |
193 | } | |
194 | ||
23cd2dcc RK |
195 | // A sane mod function that works for negative numbers. |
196 | // Returns a % b. | |
197 | function mod(a, b) { | |
198 | return ((a % b) + b) % b; | |
199 | } | |
200 | ||
201 | function normaliseIndices(x, y, z) { | |
b395419b RK |
202 | var zoomFactor = Math.pow(2, z); |
203 | return {x: mod(x, zoomFactor), | |
204 | y: mod(y, zoomFactor), | |
23cd2dcc RK |
205 | z: z}; |
206 | } | |
207 | ||
208 | function tileURL(x, y, z) { | |
209 | var norm = normaliseIndices(x, y, z); | |
14e6d3ad RK |
210 | return gMapStyles[gActiveMap].url |
211 | .replace("{x}", norm.x) | |
212 | .replace("{y}", norm.y) | |
213 | .replace("{z}", norm.z) | |
214 | .replace("[a-c]", String.fromCharCode(97 + Math.floor(Math.random() * 2))); | |
23cd2dcc RK |
215 | } |
216 | ||
217 | // Returns true if the tile is outside the current view. | |
218 | function isOutsideWindow(t) { | |
219 | var pos = decodeIndex(t); | |
220 | var x = pos[0]; | |
221 | var y = pos[1]; | |
222 | var z = pos[2]; | |
223 | ||
b395419b RK |
224 | var zoomFactor = Math.pow(2, gMaxZoom - z); |
225 | var wid = gCanvas.width * zoomFactor; | |
226 | var ht = gCanvas.height * zoomFactor; | |
23cd2dcc | 227 | |
b395419b RK |
228 | x *= zoomFactor; |
229 | y *= zoomFactor; | |
23cd2dcc | 230 | |
b395419b | 231 | var sz = gTileSize * zoomFactor; |
23cd2dcc RK |
232 | if (x > gPos.x + wid / 2 || y > gPos.y + ht / 2 || |
233 | x + sz < gPos.x - wid / 2 || y - sz < gPos.y - ht / 2) | |
234 | return true; | |
235 | return false; | |
236 | } | |
237 | ||
238 | function encodeIndex(x, y, z) { | |
239 | var norm = normaliseIndices(x, y, z); | |
240 | return norm.x + "," + norm.y + "," + norm.z; | |
241 | } | |
242 | ||
243 | function decodeIndex(encodedIdx) { | |
244 | return encodedIdx.split(",", 3); | |
245 | } | |
246 | ||
247 | function drawMap() { | |
248 | // Go through all the currently loaded tiles. If we don't want any of them remove them. | |
249 | // for (t in gTiles) { | |
250 | // if (isOutsideWindow(t)) | |
251 | // delete gTiles[t]; | |
252 | // } | |
b395419b RK |
253 | document.getElementById("zoomLevel").textContent = gPos.z; |
254 | gZoomFactor = Math.pow(2, gMaxZoom - gPos.z); | |
255 | var wid = gCanvas.width * gZoomFactor; // Width in level 18 pixels. | |
256 | var ht = gCanvas.height * gZoomFactor; // Height in level 18 pixels. | |
257 | var size = gTileSize * gZoomFactor; // Tile size in level 18 pixels. | |
23cd2dcc RK |
258 | |
259 | var xMin = gPos.x - wid / 2; // Corners of the window in level 18 pixels. | |
260 | var yMin = gPos.y - ht / 2; | |
261 | var xMax = gPos.x + wid / 2; | |
262 | var yMax = gPos.y + ht / 2; | |
263 | ||
3610c22d RK |
264 | if (gMapPrefsLoaded && mainDB) |
265 | gPrefs.set("position", gPos); | |
266 | ||
267 | // Go through all the tiles we want. | |
268 | // If any of them aren't loaded or being loaded, do so. | |
b47b4a65 | 269 | for (var x = Math.floor(xMin / size); x < Math.ceil(xMax / size); x++) { |
0118cbd3 | 270 | for (var y = Math.floor(yMin / size); y < Math.ceil(yMax / size); y++) { // slow script warnings on the tablet appear here! |
b395419b RK |
271 | var xoff = (x * size - xMin) / gZoomFactor; |
272 | var yoff = (y * size - yMin) / gZoomFactor; | |
273 | var tileKey = encodeIndex(x, y, gPos.z); | |
23cd2dcc | 274 | if (gTiles[tileKey] && gTiles[tileKey].complete) { |
3610c22d RK |
275 | // Round here is **CRUCIAL** otherwise the images are filtered |
276 | // and the performance sucks (more than expected). | |
23cd2dcc RK |
277 | gContext.drawImage(gTiles[tileKey], Math.round(xoff), Math.round(yoff)); |
278 | } | |
279 | else { | |
280 | if (!gTiles[tileKey]) { | |
281 | gTiles[tileKey] = new Image(); | |
282 | gTiles[tileKey].src = tileURL(x, y, gPos.z); | |
283 | gTiles[tileKey].onload = function() { | |
284 | // TODO: Just render this tile where it should be. | |
285 | // context.drawImage(gTiles[tileKey], Math.round(xoff), Math.round(yoff)); // Doesn't work for some reason. | |
286 | drawMap(); | |
287 | } | |
288 | } | |
b395419b | 289 | gContext.drawImage(gLoadingTile, Math.round(xoff), Math.round(yoff)); |
23cd2dcc RK |
290 | } |
291 | } | |
292 | } | |
14e6d3ad RK |
293 | if (gTrack.length) { |
294 | gLastDrawnPoint = null; | |
55c4a0b7 | 295 | for (var i = 0; i < gTrack.length; i++) { |
14e6d3ad RK |
296 | drawTrackPoint(gTrack[i].coords.latitude, gTrack[i].coords.longitude, |
297 | (i + 1 >= gTrack.length)); | |
55c4a0b7 | 298 | } |
14e6d3ad | 299 | } |
55c4a0b7 RK |
300 | } |
301 | ||
14e6d3ad | 302 | function drawTrackPoint(aLatitude, aLongitude, lastPoint) { |
55c4a0b7 | 303 | var trackpoint = gps2xy(aLatitude, aLongitude); |
14e6d3ad RK |
304 | // lastPoint is for optimizing (not actually executing the draw until the last) |
305 | trackpoint.optimized = (lastPoint === false); | |
306 | ||
307 | if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) { | |
308 | gContext.strokeStyle = "#FF0000"; | |
309 | gContext.fillStyle = gContext.strokeStyle; | |
310 | gContext.lineWidth = 2; | |
311 | gContext.lineCap = "round"; | |
312 | gContext.lineJoin = "round"; | |
313 | } | |
314 | if (!gLastDrawnPoint || gLastDrawnPoint == trackpoint) { | |
315 | // This breaks optimiziation, so make sure to close path and reset optimization. | |
316 | if (gLastDrawnPoint && gLastDrawnPoint.optimized) | |
317 | gContext.stroke(); | |
318 | gContext.beginPath(); | |
319 | trackpoint.optimized = false; | |
320 | gContext.arc(Math.round((trackpoint.x - gPos.x) / gZoomFactor + gCanvas.width / 2), | |
321 | Math.round((trackpoint.y - gPos.y) / gZoomFactor + gCanvas.height / 2), | |
55c4a0b7 RK |
322 | gContext.lineWidth, 0, Math.PI * 2, false); |
323 | gContext.fill(); | |
324 | } | |
325 | else { | |
14e6d3ad RK |
326 | if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) { |
327 | gContext.beginPath(); | |
328 | gContext.moveTo(Math.round((gLastDrawnPoint.x - gPos.x) / gZoomFactor + gCanvas.width / 2), | |
329 | Math.round((gLastDrawnPoint.y - gPos.y) / gZoomFactor + gCanvas.height / 2)); | |
330 | } | |
331 | gContext.lineTo(Math.round((trackpoint.x - gPos.x) / gZoomFactor + gCanvas.width / 2), | |
332 | Math.round((trackpoint.y - gPos.y) / gZoomFactor + gCanvas.height / 2)); | |
333 | if (!trackpoint.optimized) | |
334 | gContext.stroke(); | |
55c4a0b7 | 335 | } |
14e6d3ad | 336 | gLastDrawnPoint = trackpoint; |
23cd2dcc RK |
337 | } |
338 | ||
339 | var mapEvHandler = { | |
340 | handleEvent: function(aEvent) { | |
341 | var touchEvent = aEvent.type.indexOf('touch') != -1; | |
342 | ||
b395419b | 343 | // Bail out on unwanted map moves, but not zoom-changing events. |
23cd2dcc RK |
344 | if (aEvent.type != "DOMMouseScroll" && aEvent.type != "mousewheel") { |
345 | // Bail out if this is neither a touch nor left-click. | |
346 | if (!touchEvent && aEvent.button != 0) | |
347 | return; | |
348 | ||
349 | // Bail out if the started touch can't be found. | |
4b12da3a RK |
350 | if (touchEvent && gDragging && |
351 | !aEvent.changedTouches.identifiedTouch(gDragTouchID)) | |
23cd2dcc RK |
352 | return; |
353 | } | |
354 | ||
355 | var coordObj = touchEvent ? | |
4b12da3a | 356 | aEvent.changedTouches.identifiedTouch(gDragTouchID) : |
23cd2dcc RK |
357 | aEvent; |
358 | ||
359 | switch (aEvent.type) { | |
360 | case "mousedown": | |
361 | case "touchstart": | |
362 | if (touchEvent) { | |
4b12da3a RK |
363 | gDragTouchID = aEvent.changedTouches.item(0).identifier; |
364 | coordObj = aEvent.changedTouches.identifiedTouch(gDragTouchID); | |
23cd2dcc RK |
365 | } |
366 | var x = coordObj.clientX - gCanvas.offsetLeft; | |
367 | var y = coordObj.clientY - gCanvas.offsetTop; | |
b395419b | 368 | |
23cd2dcc RK |
369 | if (touchEvent || aEvent.button === 0) { |
370 | gDragging = true; | |
371 | } | |
372 | gLastMouseX = x; | |
373 | gLastMouseY = y; | |
7a549148 | 374 | showUI(); |
23cd2dcc RK |
375 | break; |
376 | case "mousemove": | |
377 | case "touchmove": | |
378 | var x = coordObj.clientX - gCanvas.offsetLeft; | |
379 | var y = coordObj.clientY - gCanvas.offsetTop; | |
380 | if (gDragging === true) { | |
381 | var dX = x - gLastMouseX; | |
382 | var dY = y - gLastMouseY; | |
b395419b RK |
383 | gPos.x -= dX * gZoomFactor; |
384 | gPos.y -= dY * gZoomFactor; | |
23cd2dcc | 385 | drawMap(); |
7a549148 | 386 | showUI(); |
23cd2dcc RK |
387 | } |
388 | gLastMouseX = x; | |
389 | gLastMouseY = y; | |
390 | break; | |
391 | case "mouseup": | |
392 | case "touchend": | |
393 | gDragging = false; | |
7a549148 | 394 | showUI(); |
23cd2dcc RK |
395 | break; |
396 | case "mouseout": | |
397 | case "touchcancel": | |
398 | case "touchleave": | |
399 | //gDragging = false; | |
400 | break; | |
401 | case "DOMMouseScroll": | |
402 | case "mousewheel": | |
403 | var delta = 0; | |
404 | if (aEvent.wheelDelta) { | |
405 | delta = aEvent.wheelDelta / 120; | |
406 | if (window.opera) | |
407 | delta = -delta; | |
408 | } | |
409 | else if (aEvent.detail) { | |
410 | delta = -aEvent.detail / 3; | |
411 | } | |
412 | ||
b395419b RK |
413 | // Calculate new center of the map - same point stays under the mouse. |
414 | // This means that the pixel distance between the old center and point | |
415 | // must equal the pixel distance of the new center and that point. | |
416 | var x = coordObj.clientX - gCanvas.offsetLeft; | |
417 | var y = coordObj.clientY - gCanvas.offsetTop; | |
55c4a0b7 RK |
418 | // Debug output: "coordinates" of the point the mouse was over. |
419 | /* | |
420 | var ptCoord = {x: gPos.x + (x - gCanvas.width / 2) * gZoomFactor, | |
421 | y: gPos.y + (x - gCanvas.height / 2) * gZoomFactor}; | |
422 | var gpsCoord = xy2gps(ptCoord.x, ptCoord.y); | |
423 | var pt2Coord = gps2xy(gpsCoord.latitude, gpsCoord.longitude); | |
424 | document.getElementById("debug").textContent = | |
425 | ptCoord.x + "/" + ptCoord.y + " - " + | |
426 | gpsCoord.latitude + "/" + gpsCoord.longitude + " - " + | |
427 | pt2Coord.x + "/" + pt2Coord.y; | |
428 | */ | |
b395419b RK |
429 | // Zoom factor after this action. |
430 | var newZoomFactor = Math.pow(2, gMaxZoom - gPos.z + (delta > 0 ? -1 : 1)); | |
431 | gPos.x -= (x - gCanvas.width / 2) * (newZoomFactor - gZoomFactor); | |
432 | gPos.y -= (y - gCanvas.height / 2) * (newZoomFactor - gZoomFactor); | |
b395419b | 433 | |
23cd2dcc RK |
434 | if (delta > 0) |
435 | zoomIn(); | |
436 | else if (delta < 0) | |
437 | zoomOut(); | |
438 | break; | |
439 | } | |
440 | } | |
441 | }; | |
55c4a0b7 | 442 | |
993fd081 | 443 | var geofake = { |
55c4a0b7 | 444 | tracking: false, |
4b12da3a | 445 | lastPos: {x: undefined, y: undefined}, |
55c4a0b7 RK |
446 | watchPosition: function(aSuccessCallback, aErrorCallback, aPrefObject) { |
447 | this.tracking = true; | |
448 | var watchCall = function() { | |
4b12da3a RK |
449 | // calc new position in lat/lon degrees |
450 | // 90° on Earth surface are ~10,000 km at the equator, | |
451 | // so try moving at most 10m at a time | |
452 | if (geofake.lastPos.x) | |
453 | geofake.lastPos.x += (Math.random() - .5) * 90 / 1000000 | |
454 | else | |
455 | geofake.lastPos.x = 48.208174 | |
456 | if (geofake.lastPos.y) | |
457 | geofake.lastPos.y += (Math.random() - .5) * 90 / 1000000 | |
458 | else | |
459 | geofake.lastPos.y = 16.373819 | |
55c4a0b7 | 460 | aSuccessCallback({timestamp: Date.now(), |
4b12da3a RK |
461 | coords: {latitude: geofake.lastPos.x, |
462 | longitude: geofake.lastPos.y, | |
55c4a0b7 RK |
463 | accuracy: 20}}); |
464 | if (geofake.tracking) | |
465 | setTimeout(watchCall, 1000); | |
466 | }; | |
467 | setTimeout(watchCall, 1000); | |
468 | return "foo"; | |
469 | }, | |
470 | clearWatch: function(aID) { | |
471 | this.tracking = false; | |
472 | } | |
473 | } | |
474 | ||
3610c22d RK |
475 | function setCentering(aCheckbox) { |
476 | if (gMapPrefsLoaded && mainDB) | |
477 | gPrefs.set("center_map", aCheckbox.checked); | |
478 | gCenterPosition = aCheckbox.checked; | |
479 | } | |
480 | ||
481 | function setTracking(aCheckbox) { | |
482 | if (gMapPrefsLoaded && mainDB) | |
483 | gPrefs.set("tracking_enabled", aCheckbox.checked); | |
484 | if (aCheckbox.checked) | |
485 | startTracking(); | |
486 | else | |
487 | endTracking(); | |
488 | } | |
489 | ||
55c4a0b7 | 490 | function startTracking() { |
993fd081 RK |
491 | var loopCnt = 0; |
492 | var getStoredTrack = function() { | |
493 | if (mainDB) | |
494 | gTrackStore.getList(function(aTPoints) { | |
4b12da3a RK |
495 | if (gDebug) |
496 | document.getElementById("debug").textContent = aTPoints.length + " points loaded."; | |
993fd081 RK |
497 | if (aTPoints.length) { |
498 | gTrack = aTPoints; | |
499 | } | |
500 | }); | |
501 | else | |
502 | setTimeout(getStoredTrack, 100); | |
503 | loopCnt++; | |
504 | if (loopCnt > 20) | |
505 | return; | |
506 | }; | |
507 | getStoredTrack(); | |
31f0fe16 | 508 | if (gGeolocation) { |
4b12da3a | 509 | gGeoWatchID = gGeolocation.watchPosition( |
55c4a0b7 RK |
510 | function(position) { |
511 | // Coords spec: https://developer.mozilla.org/en/XPCOM_Interface_Reference/NsIDOMGeoPositionCoords | |
993fd081 | 512 | var tPoint = {time: position.timestamp, |
31f0fe16 RK |
513 | coords: {latitude: position.coords.latitude, |
514 | longitude: position.coords.longitude, | |
515 | altitude: position.coords.altitude, | |
516 | accuracy: position.coords.accuracy, | |
517 | altitudeAccuracy: position.coords.altitudeAccuracy, | |
518 | heading: position.coords.heading, | |
519 | speed: position.coords.speed}, | |
993fd081 | 520 | beginSegment: !gLastTrackPoint}; |
14e6d3ad | 521 | gLastTrackPoint = tPoint; |
993fd081 | 522 | gTrack.push(tPoint); |
31f0fe16 | 523 | try { gTrackStore.push(tPoint); } catch(e) {} |
14e6d3ad | 524 | var redrawn = false; |
05c21757 | 525 | if (gCenterPosition) { |
3610c22d RK |
526 | var posCoord = gps2xy(position.coords.latitude, |
527 | position.coords.longitude); | |
99631a75 RK |
528 | if (Math.abs(gPos.x - posCoord.x) > gCanvas.width * gZoomFactor / 4 || |
529 | Math.abs(gPos.y - posCoord.y) > gCanvas.height * gZoomFactor / 4) { | |
530 | gPos.x = posCoord.x; | |
531 | gPos.y = posCoord.y; | |
14e6d3ad RK |
532 | drawMap(); // This draws the current point as well. |
533 | redrawn = true; | |
99631a75 | 534 | } |
05c21757 | 535 | } |
14e6d3ad RK |
536 | if (!redrawn) |
537 | drawTrackPoint(position.coords.latitude, position.coords.longitude, true); | |
55c4a0b7 RK |
538 | }, |
539 | function(error) { | |
540 | // Ignore erros for the moment, but this is good for debugging. | |
541 | // See https://developer.mozilla.org/en/Using_geolocation#Handling_errors | |
542 | document.getElementById("debug").textContent = error.message; | |
543 | }, | |
544 | {enableHighAccuracy: true} | |
545 | ); | |
546 | } | |
547 | } | |
548 | ||
549 | function endTracking() { | |
550 | if (gGeoWatchID) { | |
4b12da3a | 551 | gGeolocation.clearWatch(gGeoWatchID); |
55c4a0b7 RK |
552 | } |
553 | } | |
993fd081 RK |
554 | |
555 | function clearTrack() { | |
556 | gTrack = []; | |
557 | gTrackStore.clear(); | |
558 | drawMap(); | |
559 | } |