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/. */
5 var gMapCanvas, gMapContext, gTrackCanvas, gTrackContext, gGeolocation;
9 var gMaxZoom = 18; // The minimum is 0.
11 var gMinTrackAccuracy = 1000; // meters
12 var gTrackWidth = 2; // pixels
13 var gTrackColor = "#FF0000";
14 var gCurLocSize = 6; // pixels
15 var gCurLocColor = "#A00000";
18 // OSM tile usage policy: http://wiki.openstreetmap.org/wiki/Tile_usage_policy
19 // Find some more OSM ones at http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Tile_servers
21 {name: "OpenStreetMap (Mapnik)",
22 url: "http://tile.openstreetmap.org/{z}/{x}/{y}.png",
23 copyright: 'Map data and imagery © <a href="http://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="http://www.openstreetmap.org/copyright">ODbL/CC-BY-SA</a>'},
25 {name: "Cycle Map (OSM)",
26 url: "http://[a-c].tile.opencyclemap.org/cycle/{z}/{x}/{y}.png",
27 copyright: 'Map data and imagery © <a href="http://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="http://www.openstreetmap.org/copyright">ODbL/CC-BY-SA</a>'},
29 {name: "Transport Map (OSM)",
30 url: "http://[a-c].tile2.opencyclemap.org/transport/{z}/{x}/{y}.png",
31 copyright: 'Map data and imagery © <a href="http://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="http://www.openstreetmap.org/copyright">ODbL/CC-BY-SA</a>'},
33 {name: "MapQuest OSM",
34 url: "http://otile[1-4].mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.png",
35 copyright: 'Map data © <a href="http://www.openstreetmap.org/">OpenStreetMap</a> and contributors (<a href="http://www.openstreetmap.org/copyright">ODbL/CC-BY-SA</a>), tiles Courtesy of <a href="http://www.mapquest.com/">MapQuest</a>.'},
37 {name: "MapQuest Open Aerial",
38 url: "http://oatile[1-4].mqcdn.com/tiles/1.0.0/sat/{z}/{x}/{y}.jpg",
39 copyright: 'Tiles Courtesy of <a href="http://www.mapquest.com/">MapQuest</a>, portions Courtesy NASA/JPL-Caltech and U.S. Depart. of Agriculture, Farm Service Agency.'},
41 {name: "OpenGeoServer Aerial",
42 url: "http://services.opengeoserver.org/tiles/1.0.0/globe.aerial_EPSG3857/{z}/{x}/{y}.png?origin=nw",
43 copyright: 'Tiles by <a href="http://www.opengeoserver.org/">OpenGeoServer.org</a>, <a href="https://creativecommons.org/licenses/by/3.0/at/">CC-BY 3.0 AT</a>.'},
46 url: " http://mt1.google.com/vt/x={x}&y={y}&z={z}",
47 copyright: 'Map data and imagery © <a href="http://maps.google.com/">Google</a>'},
49 var gActiveMap = "osm_mapnik";
51 var gPos = {x: 35630000.0, // Current position in the map in pixels at the maximum zoom level (18)
52 y: 23670000.0, // The range is 0-67108864 (2^gMaxZoom * gTileSize)
53 z: 5}; // This could be fractional if supported being between zoom levels.
59 // Used as an associative array.
60 // The keys have to be strings, ours will be "xindex,yindex,zindex" e.g. "13,245,12".
64 var gMapPrefsLoaded = false;
66 var gDragging = false;
71 var gLastTrackPoint, gLastDrawnPoint;
72 var gCenterPosition = true;
77 gGeolocation = navigator.geolocation;
78 gMapCanvas = document.getElementById("map");
79 gMapContext = gMapCanvas.getContext("2d");
80 gTrackCanvas = document.getElementById("track");
81 gTrackContext = gTrackCanvas.getContext("2d");
83 gActiveMap = "osm_mapnik";
87 gGeolocation = geofake;
88 var hiddenList = document.getElementsByClassName("debugHide");
89 // last to first - list of elements with that class is changing!
90 for (var i = hiddenList.length - 1; i >= 0; i--) {
91 hiddenList[i].classList.remove("debugHide");
96 var getPersistentPrefs = function() {
99 gPrefs.get("position", function(aValue) {
106 gPrefs.get("center_map", function(aValue) {
107 if (aValue === undefined)
108 document.getElementById("centerCheckbox").checked = true;
110 document.getElementById("centerCheckbox").checked = aValue;
111 setCentering(document.getElementById("centerCheckbox"));
115 gPrefs.get("tracking_enabled", function(aValue) {
116 if (aValue === undefined)
117 document.getElementById("trackCheckbox").checked = true;
119 document.getElementById("trackCheckbox").checked = aValue;
123 gTrackStore.getList(function(aTPoints) {
125 document.getElementById("debug").textContent = aTPoints.length + " points loaded.";
126 if (aTPoints.length) {
133 setTimeout(getPersistentPrefs, 100);
136 document.getElementById("debug").textContent = "Loading prefs failed.";
139 getPersistentPrefs();
141 gTrackCanvas.addEventListener("mouseup", mapEvHandler, false);
142 gTrackCanvas.addEventListener("mousemove", mapEvHandler, false);
143 gTrackCanvas.addEventListener("mousedown", mapEvHandler, false);
144 gTrackCanvas.addEventListener("mouseout", mapEvHandler, false);
146 gTrackCanvas.addEventListener("touchstart", mapEvHandler, false);
147 gTrackCanvas.addEventListener("touchmove", mapEvHandler, false);
148 gTrackCanvas.addEventListener("touchend", mapEvHandler, false);
149 gTrackCanvas.addEventListener("touchcancel", mapEvHandler, false);
150 gTrackCanvas.addEventListener("touchleave", mapEvHandler, false);
152 // XXX deprecated? see https://groups.google.com/forum/?fromgroups#!topic/mozilla.dev.planning/kuhrORubaRY[1-25]
153 gTrackCanvas.addEventListener("DOMMouseScroll", mapEvHandler, false);
154 gTrackCanvas.addEventListener("mousewheel", mapEvHandler, false);
156 document.getElementById("copyright").innerHTML =
157 gMapStyles[gActiveMap].copyright;
159 gLoadingTile = new Image();
160 gLoadingTile.src = "style/loading.png";
162 gLoadingTile.onload = function() { gWaitCounter--; };
165 function resizeAndDraw() {
166 var viewportWidth = Math.min(window.innerWidth, window.outerWidth);
167 var viewportHeight = Math.min(window.innerHeight, window.outerHeight);
169 gMapCanvas.width = viewportWidth;
170 gMapCanvas.height = viewportHeight;
171 gTrackCanvas.width = viewportWidth;
172 gTrackCanvas.height = viewportHeight;
178 if (gPos.z < gMaxZoom) {
191 function gps2xy(aLatitude, aLongitude) {
192 var maxZoomFactor = Math.pow(2, gMaxZoom) * gTileSize;
193 var convLat = aLatitude * Math.PI / 180;
194 var rawY = (1 - Math.log(Math.tan(convLat) +
195 1 / Math.cos(convLat)) / Math.PI) / 2 * maxZoomFactor;
196 var rawX = (aLongitude + 180) / 360 * maxZoomFactor;
197 return {x: Math.round(rawX),
198 y: Math.round(rawY)};
201 function xy2gps(aX, aY) {
202 var maxZoomFactor = Math.pow(2, gMaxZoom) * gTileSize;
203 var n = Math.PI - 2 * Math.PI * aY / maxZoomFactor;
204 return {latitude: 180 / Math.PI *
205 Math.atan(0.5 * (Math.exp(n) - Math.exp(-n))),
206 longitude: aX / maxZoomFactor * 360 - 180};
209 function setMapStyle() {
210 var mapSel = document.getElementById("mapSelector");
211 if (mapSel.selectedIndex >= 0 && gActiveMap != mapSel.value) {
212 gActiveMap = mapSel.value;
214 document.getElementById("copyright").innerHTML =
215 gMapStyles[gActiveMap].copyright;
221 // A sane mod function that works for negative numbers.
224 return ((a % b) + b) % b;
227 function normalizeCoords(aCoords) {
228 var zoomFactor = Math.pow(2, aCoords.z);
229 return {x: mod(aCoords.x, zoomFactor),
230 y: mod(aCoords.y, zoomFactor),
234 // Returns true if the tile is outside the current view.
235 function isOutsideWindow(t) {
236 var pos = decodeIndex(t);
238 var zoomFactor = Math.pow(2, gMaxZoom - pos.z);
239 var wid = gMapCanvas.width * zoomFactor;
240 var ht = gMapCanvas.height * zoomFactor;
245 var sz = gTileSize * zoomFactor;
246 if (pos.x > gPos.x + wid / 2 || pos.y > gPos.y + ht / 2 ||
247 pos.x + sz < gPos.x - wid / 2 || pos.y - sz < gPos.y - ht / 2)
252 function encodeIndex(x, y, z) {
253 var norm = normalizeCoords({x: x, y: y, z: z});
254 return norm.x + "," + norm.y + "," + norm.z;
257 function decodeIndex(encodedIdx) {
258 var ind = encodedIdx.split(",", 3);
259 return {x: ind[0], y: ind[1], z: ind[2]};
263 // Go through all the currently loaded tiles. If we don't want any of them remove them.
264 // for (t in gTiles) {
265 // if (isOutsideWindow(t))
268 document.getElementById("zoomLevel").textContent = gPos.z;
269 gZoomFactor = Math.pow(2, gMaxZoom - gPos.z);
270 var wid = gMapCanvas.width * gZoomFactor; // Width in level 18 pixels.
271 var ht = gMapCanvas.height * gZoomFactor; // Height in level 18 pixels.
272 var size = gTileSize * gZoomFactor; // Tile size in level 18 pixels.
274 var xMin = gPos.x - wid / 2; // Corners of the window in level 18 pixels.
275 var yMin = gPos.y - ht / 2;
276 var xMax = gPos.x + wid / 2;
277 var yMax = gPos.y + ht / 2;
279 if (gMapPrefsLoaded && mainDB)
280 gPrefs.set("position", gPos);
282 // Go through all the tiles we want.
283 // If any of them aren't loaded or being loaded, do so.
284 for (var x = Math.floor(xMin / size); x < Math.ceil(xMax / size); x++) {
285 for (var y = Math.floor(yMin / size); y < Math.ceil(yMax / size); y++) { // slow script warnings on the tablet appear here!
286 // Round here is **CRUCIAL** otherwise the images are filtered
287 // and the performance sucks (more than expected).
288 var xoff = Math.round((x * size - xMin) / gZoomFactor);
289 var yoff = Math.round((y * size - yMin) / gZoomFactor);
290 // Draw placeholder, and then initiate loading/drawing of real one.
291 gMapContext.drawImage(gLoadingTile, xoff, yoff);
293 gTileService.get(gActiveMap, {x: x, y: y, z: gPos.z}, function(aImage, aStyle, aCoords) {
294 // Only draw if this applies for the current view.
295 if ((aStyle == gActiveMap) && (aCoords.z == gPos.z)) {
296 var ixMin = gPos.x - wid / 2;
297 var iyMin = gPos.y - ht / 2;
298 var ixoff = Math.round((aCoords.x * size - ixMin) / gZoomFactor);
299 var iyoff = Math.round((aCoords.y * size - iyMin) / gZoomFactor);
300 // Would be nice to draw directly from the blob, but that crashes:
301 // gMapContext.drawImage(aImage, ixoff, iyoff);
302 var URL = window.URL;
303 var imgURL = URL.createObjectURL(aImage);
304 var imgObj = new Image();
306 imgObj.onload = function() {
307 gMapContext.drawImage(imgObj, ixoff, iyoff);
308 URL.revokeObjectURL(imgURL);
314 gLastDrawnPoint = null;
315 gCurPosMapCache = undefined;
316 gTrackContext.clearRect(0, 0, gTrackCanvas.width, gTrackCanvas.height);
318 for (var i = 0; i < gTrack.length; i++) {
319 drawTrackPoint(gTrack[i].coords.latitude, gTrack[i].coords.longitude,
320 (i + 1 >= gTrack.length));
325 function drawTrackPoint(aLatitude, aLongitude, lastPoint) {
326 var trackpoint = gps2xy(aLatitude, aLongitude);
327 // lastPoint is for optimizing (not actually executing the draw until the last)
328 trackpoint.optimized = (lastPoint === false);
329 var mappos = {x: Math.round((trackpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2),
330 y: Math.round((trackpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)};
332 if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) {
333 gTrackContext.strokeStyle = gTrackColor;
334 gTrackContext.fillStyle = gTrackContext.strokeStyle;
335 gTrackContext.lineWidth = gTrackWidth;
336 gTrackContext.lineCap = "round";
337 gTrackContext.lineJoin = "round";
339 if (!gLastDrawnPoint || gLastDrawnPoint == trackpoint) {
340 // This breaks optimiziation, so make sure to close path and reset optimization.
341 if (gLastDrawnPoint && gLastDrawnPoint.optimized)
342 gTrackContext.stroke();
343 gTrackContext.beginPath();
344 trackpoint.optimized = false;
345 gTrackContext.arc(mappos.x, mappos.y,
346 gTrackContext.lineWidth, 0, Math.PI * 2, false);
347 gTrackContext.fill();
350 if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) {
351 gTrackContext.beginPath();
352 gTrackContext.moveTo(Math.round((gLastDrawnPoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2),
353 Math.round((gLastDrawnPoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2));
355 gTrackContext.lineTo(mappos.x, mappos.y);
356 if (!trackpoint.optimized)
357 gTrackContext.stroke();
359 gLastDrawnPoint = trackpoint;
362 function drawCurrentLocation(trackPoint) {
363 var locpoint = gps2xy(trackPoint.coords.latitude, trackPoint.coords.longitude);
364 var circleRadius = Math.round(gCurLocSize / 2);
365 var mappos = {x: Math.round((locpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2),
366 y: Math.round((locpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)};
368 undrawCurrentLocation();
370 // Cache overdrawn area.
373 radius: circleRadius,
374 data: gTrackContext.getImageData(mappos.x - circleRadius,
375 mappos.y - circleRadius,
376 circleRadius * 2, circleRadius * 2)};
378 gTrackContext.strokeStyle = gCurLocColor;
379 gTrackContext.fillStyle = gTrackContext.strokeStyle;
380 gTrackContext.beginPath();
381 gTrackContext.arc(mappos.x, mappos.y,
382 circleRadius, 0, Math.PI * 2, false);
383 gTrackContext.fill();
386 function undrawCurrentLocation() {
387 if (gCurPosMapCache) {
388 var oldpoint = gCurPosMapCache.point;
389 var oldmp = {x: Math.round((oldpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2),
390 y: Math.round((oldpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)};
391 gTrackContext.putImageData(gCurPosMapCache.data,
392 oldmp.x - gCurPosMapCache.radius,
393 oldmp.y - gCurPosMapCache.radius);
394 gCurPosMapCache = undefined;
399 handleEvent: function(aEvent) {
400 var touchEvent = aEvent.type.indexOf('touch') != -1;
402 // Bail out on unwanted map moves, but not zoom-changing events.
403 if (aEvent.type != "DOMMouseScroll" && aEvent.type != "mousewheel") {
404 // Bail out if this is neither a touch nor left-click.
405 if (!touchEvent && aEvent.button != 0)
408 // Bail out if the started touch can't be found.
409 if (touchEvent && gDragging &&
410 !aEvent.changedTouches.identifiedTouch(gDragTouchID))
414 var coordObj = touchEvent ?
415 aEvent.changedTouches.identifiedTouch(gDragTouchID) :
418 switch (aEvent.type) {
422 gDragTouchID = aEvent.changedTouches.item(0).identifier;
423 coordObj = aEvent.changedTouches.identifiedTouch(gDragTouchID);
425 var x = coordObj.clientX - gMapCanvas.offsetLeft;
426 var y = coordObj.clientY - gMapCanvas.offsetTop;
428 if (touchEvent || aEvent.button === 0) {
437 var x = coordObj.clientX - gMapCanvas.offsetLeft;
438 var y = coordObj.clientY - gMapCanvas.offsetTop;
439 if (gDragging === true) {
440 var dX = x - gLastMouseX;
441 var dY = y - gLastMouseY;
442 gPos.x -= dX * gZoomFactor;
443 gPos.y -= dY * gZoomFactor;
460 case "DOMMouseScroll":
463 if (aEvent.wheelDelta) {
464 delta = aEvent.wheelDelta / 120;
468 else if (aEvent.detail) {
469 delta = -aEvent.detail / 3;
472 // Debug output: "coordinates" of the point the mouse was over.
474 var ptCoord = {x: gPos.x + (x - gMapCanvas.width / 2) * gZoomFactor,
475 y: gPos.y + (x - gMapCanvas.height / 2) * gZoomFactor};
476 var gpsCoord = xy2gps(ptCoord.x, ptCoord.y);
477 var pt2Coord = gps2xy(gpsCoord.latitude, gpsCoord.longitude);
478 document.getElementById("debug").textContent =
479 ptCoord.x + "/" + ptCoord.y + " - " +
480 gpsCoord.latitude + "/" + gpsCoord.longitude + " - " +
481 pt2Coord.x + "/" + pt2Coord.y;
484 var newZoomLevel = gPos.z + (delta > 0 ? 1 : -1);
485 if ((newZoomLevel >= 0) && (newZoomLevel <= gMaxZoom)) {
486 // Calculate new center of the map - same point stays under the mouse.
487 // This means that the pixel distance between the old center and point
488 // must equal the pixel distance of the new center and that point.
489 var x = coordObj.clientX - gMapCanvas.offsetLeft;
490 var y = coordObj.clientY - gMapCanvas.offsetTop;
492 // Zoom factor after this action.
493 var newZoomFactor = Math.pow(2, gMaxZoom - newZoomLevel);
494 gPos.x -= (x - gMapCanvas.width / 2) * (newZoomFactor - gZoomFactor);
495 gPos.y -= (y - gMapCanvas.height / 2) * (newZoomFactor - gZoomFactor);
509 lastPos: {x: undefined, y: undefined},
510 watchPosition: function(aSuccessCallback, aErrorCallback, aPrefObject) {
511 this.tracking = true;
512 var watchCall = function() {
513 // calc new position in lat/lon degrees
514 // 90° on Earth surface are ~10,000 km at the equator,
515 // so try moving at most 10m at a time
516 if (geofake.lastPos.x)
517 geofake.lastPos.x += (Math.random() - .5) * 90 / 1000000
519 geofake.lastPos.x = 48.208174
520 if (geofake.lastPos.y)
521 geofake.lastPos.y += (Math.random() - .5) * 90 / 1000000
523 geofake.lastPos.y = 16.373819
524 aSuccessCallback({timestamp: Date.now(),
525 coords: {latitude: geofake.lastPos.x,
526 longitude: geofake.lastPos.y,
528 if (geofake.tracking)
529 setTimeout(watchCall, 1000);
531 setTimeout(watchCall, 1000);
534 clearWatch: function(aID) {
535 this.tracking = false;
539 function setCentering(aCheckbox) {
540 if (gMapPrefsLoaded && mainDB)
541 gPrefs.set("center_map", aCheckbox.checked);
542 gCenterPosition = aCheckbox.checked;
545 function setTracking(aCheckbox) {
546 if (gMapPrefsLoaded && mainDB)
547 gPrefs.set("tracking_enabled", aCheckbox.checked);
548 if (aCheckbox.checked)
554 function startTracking() {
556 gGeoWatchID = gGeolocation.watchPosition(
558 // Coords spec: https://developer.mozilla.org/en/XPCOM_Interface_Reference/NsIDOMGeoPositionCoords
559 var tPoint = {time: position.timestamp,
560 coords: {latitude: position.coords.latitude,
561 longitude: position.coords.longitude,
562 altitude: position.coords.altitude,
563 accuracy: position.coords.accuracy,
564 altitudeAccuracy: position.coords.altitudeAccuracy,
565 heading: position.coords.heading,
566 speed: position.coords.speed},
567 beginSegment: !gLastTrackPoint};
568 // Only add point to track is accuracy is good enough.
569 if (tPoint.coords.accuracy < gMinTrackAccuracy) {
570 gLastTrackPoint = tPoint;
572 try { gTrackStore.push(tPoint); } catch(e) {}
574 if (gCenterPosition) {
575 var posCoord = gps2xy(position.coords.latitude,
576 position.coords.longitude);
577 if (Math.abs(gPos.x - posCoord.x) > gMapCanvas.width * gZoomFactor / 4 ||
578 Math.abs(gPos.y - posCoord.y) > gMapCanvas.height * gZoomFactor / 4) {
581 drawMap(); // This draws the current point as well.
586 undrawCurrentLocation();
587 drawTrackPoint(position.coords.latitude, position.coords.longitude, true);
589 drawCurrentLocation(tPoint);
592 // Ignore erros for the moment, but this is good for debugging.
593 // See https://developer.mozilla.org/en/Using_geolocation#Handling_errors
594 document.getElementById("debug").textContent = error.message;
596 {enableHighAccuracy: true}
601 function endTracking() {
603 gGeolocation.clearWatch(gGeoWatchID);
607 function clearTrack() {
614 objStore: "tilecache",
616 get: function(aStyle, aCoords, aCallback) {
617 var norm = normalizeCoords(aCoords);
618 var dbkey = aStyle + "::" + norm.x + "," + norm.y + "," + norm.z;
619 this.getDBCache(dbkey, function(aResult, aEvent) {
621 // We did get a cached object.
622 // TODO: Look at the timestamp and trigger a reload when it's too old.
623 aCallback(aResult.image, aStyle, aCoords);
626 // Retrieve image from the web and store it in the cache.
627 var XHR = new XMLHttpRequest();
629 gMapStyles[aStyle].url
630 .replace("{x}", norm.x)
631 .replace("{y}", norm.y)
632 .replace("{z}", norm.z)
633 .replace("[a-c]", String.fromCharCode(97 + Math.floor(Math.random() * 2)))
634 .replace("[1-4]", 1 + Math.floor(Math.random() * 3)),
636 XHR.responseType = "blob";
637 XHR.addEventListener("load", function () {
638 if (XHR.status === 200) {
639 var blob = XHR.response;
640 gTileService.setDBCache(dbkey, {image: blob, timestamp: Date.now()});
641 aCallback(blob, aStyle, aCoords);
649 getDBCache: function(aKey, aCallback) {
652 var transaction = mainDB.transaction([this.objStore]);
653 var request = transaction.objectStore(this.objStore).get(aKey);
654 request.onsuccess = function(event) {
655 aCallback(request.result, event);
657 request.onerror = function(event) {
658 // Errors can be handled here.
659 aCallback(undefined, event);
663 setDBCache: function(aKey, aValue, aCallback) {
667 var transaction = mainDB.transaction([this.objStore], "readwrite");
668 var objStore = transaction.objectStore(this.objStore);
669 var request = objStore.put(aValue, aKey);
670 request.onsuccess = function(event) {
673 aCallback(success, event);
675 request.onerror = function(event) {
676 // Errors can be handled here.
678 aCallback(success, event);
682 unsetDBCache: function(aKey, aCallback) {
686 var transaction = mainDB.transaction([this.objStore], "readwrite");
687 var request = transaction.objectStore(this.objStore).delete(aKey);
688 request.onsuccess = function(event) {
691 aCallback(success, event);
693 request.onerror = function(event) {
694 // Errors can be handled here.
696 aCallback(success, event);