* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
-var gCanvas, gContext, gGeolocation;
+var gMapCanvas, gMapContext, gTrackCanvas, gTrackContext, gGeolocation;
var gDebug = false;
var gTileSize = 256;
var gMaxZoom = 18; // The minimum is 0.
+var gMinTrackAccuracy = 1000; // meters
+var gTrackWidth = 2; // pixels
+var gTrackColor = "#FF0000";
+var gCurLocSize = 6; // pixels
+var gCurLocColor = "#A00000";
+
var gMapStyles = {
// OSM tile usage policy: http://wiki.openstreetmap.org/wiki/Tile_usage_policy
// Find some more OSM ones at http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Tile_servers
osm_mapnik:
{name: "OpenStreetMap (Mapnik)",
url: "http://tile.openstreetmap.org/{z}/{x}/{y}.png",
- 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>'},
- osm_tilesathome:
- {name: "OpenStreetMap (OSMarender)",
- url: "http://tah.openstreetmap.org/Tiles/tile/{z}/{x}/{y}.png",
- 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>'},
+ 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>'},
+ osm_cyclemap:
+ {name: "Cycle Map (OSM)",
+ url: "http://[a-c].tile.opencyclemap.org/cycle/{z}/{x}/{y}.png",
+ 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>'},
+ osm_transmap:
+ {name: "Transport Map (OSM)",
+ url: "http://[a-c].tile2.opencyclemap.org/transport/{z}/{x}/{y}.png",
+ 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>'},
mapquest_open:
{name: "MapQuest OSM",
- url: "http://otile1.mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.png",
- 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>.'},
+ url: "http://otile[1-4].mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.png",
+ 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>.'},
mapquest_aerial:
{name: "MapQuest Open Aerial",
- url: "http://oatile1.mqcdn.com/naip/{z}/{x}/{y}.png",
- 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>.'},
+ url: "http://oatile[1-4].mqcdn.com/tiles/1.0.0/sat/{z}/{x}/{y}.jpg",
+ 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.'},
+ opengeoserver_arial:
+ {name: "OpenGeoServer Aerial",
+ url: "http://services.opengeoserver.org/tiles/1.0.0/globe.aerial_EPSG3857/{z}/{x}/{y}.png?origin=nw",
+ 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>.'},
google_map:
{name: "Google Maps",
url: " http://mt1.google.com/vt/x={x}&y={y}&z={z}",
var gGeoWatchID;
var gTrack = [];
-var gLastTrackPoint;
+var gLastTrackPoint, gLastDrawnPoint;
var gCenterPosition = true;
+var gCurPosMapCache;
+
function initMap() {
gGeolocation = navigator.geolocation;
- gCanvas = document.getElementById("map");
- gContext = gCanvas.getContext("2d");
+ gMapCanvas = document.getElementById("map");
+ gMapContext = gMapCanvas.getContext("2d");
+ gTrackCanvas = document.getElementById("track");
+ gTrackContext = gTrackCanvas.getContext("2d");
if (!gActiveMap)
gActiveMap = "osm_mapnik";
var loopCnt = 0;
var getPersistentPrefs = function() {
if (mainDB) {
+ gWaitCounter++;
gPrefs.get("position", function(aValue) {
if (aValue) {
gPos = aValue;
- drawMap();
+ gWaitCounter--;
}
});
+ gWaitCounter++;
gPrefs.get("center_map", function(aValue) {
if (aValue === undefined)
document.getElementById("centerCheckbox").checked = true;
else
document.getElementById("centerCheckbox").checked = aValue;
setCentering(document.getElementById("centerCheckbox"));
+ gWaitCounter--;
});
+ gWaitCounter++;
gPrefs.get("tracking_enabled", function(aValue) {
if (aValue === undefined)
document.getElementById("trackCheckbox").checked = true;
else
document.getElementById("trackCheckbox").checked = aValue;
- setTracking(document.getElementById("trackCheckbox"));
+ gWaitCounter--;
+ });
+ gWaitCounter++;
+ gTrackStore.getList(function(aTPoints) {
+ if (gDebug)
+ document.getElementById("debug").textContent = aTPoints.length + " points loaded.";
+ if (aTPoints.length) {
+ gTrack = aTPoints;
+ }
+ gWaitCounter--;
});
- gMapPrefsLoaded = true;
}
else
setTimeout(getPersistentPrefs, 100);
loopCnt++;
- if (loopCnt > 20) {
- gMapPrefsLoaded = true;
- return;
+ if (loopCnt > 50) {
+ document.getElementById("debug").textContent = "Loading prefs failed.";
}
};
getPersistentPrefs();
- gCanvas.addEventListener("mouseup", mapEvHandler, false);
- gCanvas.addEventListener("mousemove", mapEvHandler, false);
- gCanvas.addEventListener("mousedown", mapEvHandler, false);
- gCanvas.addEventListener("mouseout", mapEvHandler, false);
+ gTrackCanvas.addEventListener("mouseup", mapEvHandler, false);
+ gTrackCanvas.addEventListener("mousemove", mapEvHandler, false);
+ gTrackCanvas.addEventListener("mousedown", mapEvHandler, false);
+ gTrackCanvas.addEventListener("mouseout", mapEvHandler, false);
- gCanvas.addEventListener("touchstart", mapEvHandler, false);
- gCanvas.addEventListener("touchmove", mapEvHandler, false);
- gCanvas.addEventListener("touchend", mapEvHandler, false);
- gCanvas.addEventListener("touchcancel", mapEvHandler, false);
- gCanvas.addEventListener("touchleave", mapEvHandler, false);
+ gTrackCanvas.addEventListener("touchstart", mapEvHandler, false);
+ gTrackCanvas.addEventListener("touchmove", mapEvHandler, false);
+ gTrackCanvas.addEventListener("touchend", mapEvHandler, false);
+ gTrackCanvas.addEventListener("touchcancel", mapEvHandler, false);
+ gTrackCanvas.addEventListener("touchleave", mapEvHandler, false);
- gCanvas.addEventListener("DOMMouseScroll", mapEvHandler, false);
- gCanvas.addEventListener("mousewheel", mapEvHandler, false);
+ // XXX deprecated? see https://groups.google.com/forum/?fromgroups#!topic/mozilla.dev.planning/kuhrORubaRY[1-25]
+ gTrackCanvas.addEventListener("DOMMouseScroll", mapEvHandler, false);
+ gTrackCanvas.addEventListener("mousewheel", mapEvHandler, false);
document.getElementById("copyright").innerHTML =
gMapStyles[gActiveMap].copyright;
gLoadingTile = new Image();
gLoadingTile.src = "style/loading.png";
+ gWaitCounter++;
+ gLoadingTile.onload = function() { gWaitCounter--; };
}
function resizeAndDraw() {
var viewportWidth = Math.min(window.innerWidth, window.outerWidth);
var viewportHeight = Math.min(window.innerHeight, window.outerHeight);
- var canvasWidth = viewportWidth - 2;
- var canvasHeight = viewportHeight - 2;
- gCanvas.style.position = "fixed";
- gCanvas.width = canvasWidth;
- gCanvas.height = canvasHeight;
+ gMapCanvas.width = viewportWidth;
+ gMapCanvas.height = viewportHeight;
+ gTrackCanvas.width = viewportWidth;
+ gTrackCanvas.height = viewportHeight;
drawMap();
+ showUI();
}
function zoomIn() {
if (mapSel.selectedIndex >= 0 && gActiveMap != mapSel.value) {
gActiveMap = mapSel.value;
gTiles = {};
+ document.getElementById("copyright").innerHTML =
+ gMapStyles[gActiveMap].copyright;
+ showUI();
drawMap();
}
}
return ((a % b) + b) % b;
}
-function normaliseIndices(x, y, z) {
- var zoomFactor = Math.pow(2, z);
- return {x: mod(x, zoomFactor),
- y: mod(y, zoomFactor),
- z: z};
-}
-
-function tileURL(x, y, z) {
- var norm = normaliseIndices(x, y, z);
- return gMapStyles[gActiveMap].url.replace("{x}", norm.x)
- .replace("{y}", norm.y)
- .replace("{z}", norm.z);
+function normalizeCoords(aCoords) {
+ var zoomFactor = Math.pow(2, aCoords.z);
+ return {x: mod(aCoords.x, zoomFactor),
+ y: mod(aCoords.y, zoomFactor),
+ z: aCoords.z};
}
// Returns true if the tile is outside the current view.
function isOutsideWindow(t) {
var pos = decodeIndex(t);
- var x = pos[0];
- var y = pos[1];
- var z = pos[2];
- var zoomFactor = Math.pow(2, gMaxZoom - z);
- var wid = gCanvas.width * zoomFactor;
- var ht = gCanvas.height * zoomFactor;
+ var zoomFactor = Math.pow(2, gMaxZoom - pos.z);
+ var wid = gMapCanvas.width * zoomFactor;
+ var ht = gMapCanvas.height * zoomFactor;
- x *= zoomFactor;
- y *= zoomFactor;
+ pos.x *= zoomFactor;
+ pos.y *= zoomFactor;
var sz = gTileSize * zoomFactor;
- if (x > gPos.x + wid / 2 || y > gPos.y + ht / 2 ||
- x + sz < gPos.x - wid / 2 || y - sz < gPos.y - ht / 2)
+ if (pos.x > gPos.x + wid / 2 || pos.y > gPos.y + ht / 2 ||
+ pos.x + sz < gPos.x - wid / 2 || pos.y - sz < gPos.y - ht / 2)
return true;
return false;
}
function encodeIndex(x, y, z) {
- var norm = normaliseIndices(x, y, z);
+ var norm = normalizeCoords({x: x, y: y, z: z});
return norm.x + "," + norm.y + "," + norm.z;
}
function decodeIndex(encodedIdx) {
- return encodedIdx.split(",", 3);
+ var ind = encodedIdx.split(",", 3);
+ return {x: ind[0], y: ind[1], z: ind[2]};
}
function drawMap() {
// }
document.getElementById("zoomLevel").textContent = gPos.z;
gZoomFactor = Math.pow(2, gMaxZoom - gPos.z);
- var wid = gCanvas.width * gZoomFactor; // Width in level 18 pixels.
- var ht = gCanvas.height * gZoomFactor; // Height in level 18 pixels.
+ var wid = gMapCanvas.width * gZoomFactor; // Width in level 18 pixels.
+ var ht = gMapCanvas.height * gZoomFactor; // Height in level 18 pixels.
var size = gTileSize * gZoomFactor; // Tile size in level 18 pixels.
var xMin = gPos.x - wid / 2; // Corners of the window in level 18 pixels.
// Go through all the tiles we want.
// If any of them aren't loaded or being loaded, do so.
for (var x = Math.floor(xMin / size); x < Math.ceil(xMax / size); x++) {
- for (var y = Math.floor(yMin / size); y < Math.ceil(yMax / size); y++) {
- var xoff = (x * size - xMin) / gZoomFactor;
- var yoff = (y * size - yMin) / gZoomFactor;
- var tileKey = encodeIndex(x, y, gPos.z);
- if (gTiles[tileKey] && gTiles[tileKey].complete) {
- // Round here is **CRUCIAL** otherwise the images are filtered
- // and the performance sucks (more than expected).
- gContext.drawImage(gTiles[tileKey], Math.round(xoff), Math.round(yoff));
- }
- else {
- if (!gTiles[tileKey]) {
- gTiles[tileKey] = new Image();
- gTiles[tileKey].src = tileURL(x, y, gPos.z);
- gTiles[tileKey].onload = function() {
- // TODO: Just render this tile where it should be.
- // context.drawImage(gTiles[tileKey], Math.round(xoff), Math.round(yoff)); // Doesn't work for some reason.
- drawMap();
+ for (var y = Math.floor(yMin / size); y < Math.ceil(yMax / size); y++) { // slow script warnings on the tablet appear here!
+ // Round here is **CRUCIAL** otherwise the images are filtered
+ // and the performance sucks (more than expected).
+ var xoff = Math.round((x * size - xMin) / gZoomFactor);
+ var yoff = Math.round((y * size - yMin) / gZoomFactor);
+ // Draw placeholder, and then initiate loading/drawing of real one.
+ gMapContext.drawImage(gLoadingTile, xoff, yoff);
+
+ gTileService.get(gActiveMap, {x: x, y: y, z: gPos.z}, function(aImage, aStyle, aCoords) {
+ // Only draw if this applies for the current view.
+ if ((aStyle == gActiveMap) && (aCoords.z == gPos.z)) {
+ var ixMin = gPos.x - wid / 2;
+ var iyMin = gPos.y - ht / 2;
+ var ixoff = Math.round((aCoords.x * size - ixMin) / gZoomFactor);
+ var iyoff = Math.round((aCoords.y * size - iyMin) / gZoomFactor);
+ // Would be nice to draw directly from the blob, but that crashes:
+ // gMapContext.drawImage(aImage, ixoff, iyoff);
+ var URL = window.URL;
+ var imgURL = URL.createObjectURL(aImage);
+ var imgObj = new Image();
+ imgObj.src = imgURL;
+ imgObj.onload = function() {
+ gMapContext.drawImage(imgObj, ixoff, iyoff);
+ URL.revokeObjectURL(imgURL);
}
}
- gContext.drawImage(gLoadingTile, Math.round(xoff), Math.round(yoff));
- }
+ });
}
}
- if (gTrack.length)
+ gLastDrawnPoint = null;
+ gCurPosMapCache = undefined;
+ gTrackContext.clearRect(0, 0, gTrackCanvas.width, gTrackCanvas.height);
+ if (gTrack.length) {
for (var i = 0; i < gTrack.length; i++) {
- drawTrackPoint(gTrack[i].coords.latitude, gTrack[i].coords.longitude);
+ drawTrackPoint(gTrack[i].coords.latitude, gTrack[i].coords.longitude,
+ (i + 1 >= gTrack.length));
}
+ }
}
-function drawTrackPoint(aLatitude, aLongitude) {
+function drawTrackPoint(aLatitude, aLongitude, lastPoint) {
var trackpoint = gps2xy(aLatitude, aLongitude);
- gContext.strokeStyle = "#FF0000";
- gContext.fillStyle = gContext.strokeStyle;
- gContext.lineWidth = 2;
- gContext.lineCap = "round";
- gContext.lineJoin = "round";
- gContext.beginPath();
- if (!gLastTrackPoint || gLastTrackPoint == trackpoint) {
- gContext.arc((trackpoint.x - gPos.x) / gZoomFactor + gCanvas.width / 2,
- (trackpoint.y - gPos.y) / gZoomFactor + gCanvas.height / 2,
- gContext.lineWidth, 0, Math.PI * 2, false);
- gContext.fill();
+ // lastPoint is for optimizing (not actually executing the draw until the last)
+ trackpoint.optimized = (lastPoint === false);
+ var mappos = {x: Math.round((trackpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2),
+ y: Math.round((trackpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)};
+
+ if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) {
+ gTrackContext.strokeStyle = gTrackColor;
+ gTrackContext.fillStyle = gTrackContext.strokeStyle;
+ gTrackContext.lineWidth = gTrackWidth;
+ gTrackContext.lineCap = "round";
+ gTrackContext.lineJoin = "round";
+ }
+ if (!gLastDrawnPoint || gLastDrawnPoint == trackpoint) {
+ // This breaks optimiziation, so make sure to close path and reset optimization.
+ if (gLastDrawnPoint && gLastDrawnPoint.optimized)
+ gTrackContext.stroke();
+ gTrackContext.beginPath();
+ trackpoint.optimized = false;
+ gTrackContext.arc(mappos.x, mappos.y,
+ gTrackContext.lineWidth, 0, Math.PI * 2, false);
+ gTrackContext.fill();
}
else {
- gContext.moveTo((gLastTrackPoint.x - gPos.x) / gZoomFactor + gCanvas.width / 2,
- (gLastTrackPoint.y - gPos.y) / gZoomFactor + gCanvas.height / 2);
- gContext.lineTo((trackpoint.x - gPos.x) / gZoomFactor + gCanvas.width / 2,
- (trackpoint.y - gPos.y) / gZoomFactor + gCanvas.height / 2);
- gContext.stroke();
+ if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) {
+ gTrackContext.beginPath();
+ gTrackContext.moveTo(Math.round((gLastDrawnPoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2),
+ Math.round((gLastDrawnPoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2));
+ }
+ gTrackContext.lineTo(mappos.x, mappos.y);
+ if (!trackpoint.optimized)
+ gTrackContext.stroke();
+ }
+ gLastDrawnPoint = trackpoint;
+}
+
+function drawCurrentLocation(trackPoint) {
+ var locpoint = gps2xy(trackPoint.coords.latitude, trackPoint.coords.longitude);
+ var circleRadius = Math.round(gCurLocSize / 2);
+ var mappos = {x: Math.round((locpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2),
+ y: Math.round((locpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)};
+
+ undrawCurrentLocation();
+
+ // Cache overdrawn area.
+ gCurPosMapCache =
+ {point: locpoint,
+ radius: circleRadius,
+ data: gTrackContext.getImageData(mappos.x - circleRadius,
+ mappos.y - circleRadius,
+ circleRadius * 2, circleRadius * 2)};
+
+ gTrackContext.strokeStyle = gCurLocColor;
+ gTrackContext.fillStyle = gTrackContext.strokeStyle;
+ gTrackContext.beginPath();
+ gTrackContext.arc(mappos.x, mappos.y,
+ circleRadius, 0, Math.PI * 2, false);
+ gTrackContext.fill();
+}
+
+function undrawCurrentLocation() {
+ if (gCurPosMapCache) {
+ var oldpoint = gCurPosMapCache.point;
+ var oldmp = {x: Math.round((oldpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2),
+ y: Math.round((oldpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)};
+ gTrackContext.putImageData(gCurPosMapCache.data,
+ oldmp.x - gCurPosMapCache.radius,
+ oldmp.y - gCurPosMapCache.radius);
+ gCurPosMapCache = undefined;
}
- gLastTrackPoint = trackpoint;
}
var mapEvHandler = {
gDragTouchID = aEvent.changedTouches.item(0).identifier;
coordObj = aEvent.changedTouches.identifiedTouch(gDragTouchID);
}
- var x = coordObj.clientX - gCanvas.offsetLeft;
- var y = coordObj.clientY - gCanvas.offsetTop;
+ var x = coordObj.clientX - gMapCanvas.offsetLeft;
+ var y = coordObj.clientY - gMapCanvas.offsetTop;
if (touchEvent || aEvent.button === 0) {
gDragging = true;
}
gLastMouseX = x;
gLastMouseY = y;
+ showUI();
break;
case "mousemove":
case "touchmove":
- var x = coordObj.clientX - gCanvas.offsetLeft;
- var y = coordObj.clientY - gCanvas.offsetTop;
+ var x = coordObj.clientX - gMapCanvas.offsetLeft;
+ var y = coordObj.clientY - gMapCanvas.offsetTop;
if (gDragging === true) {
var dX = x - gLastMouseX;
var dY = y - gLastMouseY;
gPos.x -= dX * gZoomFactor;
gPos.y -= dY * gZoomFactor;
drawMap();
+ showUI();
}
gLastMouseX = x;
gLastMouseY = y;
case "mouseup":
case "touchend":
gDragging = false;
+ showUI();
break;
case "mouseout":
case "touchcancel":
delta = -aEvent.detail / 3;
}
- // Calculate new center of the map - same point stays under the mouse.
- // This means that the pixel distance between the old center and point
- // must equal the pixel distance of the new center and that point.
- var x = coordObj.clientX - gCanvas.offsetLeft;
- var y = coordObj.clientY - gCanvas.offsetTop;
// Debug output: "coordinates" of the point the mouse was over.
/*
- var ptCoord = {x: gPos.x + (x - gCanvas.width / 2) * gZoomFactor,
- y: gPos.y + (x - gCanvas.height / 2) * gZoomFactor};
+ var ptCoord = {x: gPos.x + (x - gMapCanvas.width / 2) * gZoomFactor,
+ y: gPos.y + (x - gMapCanvas.height / 2) * gZoomFactor};
var gpsCoord = xy2gps(ptCoord.x, ptCoord.y);
var pt2Coord = gps2xy(gpsCoord.latitude, gpsCoord.longitude);
document.getElementById("debug").textContent =
gpsCoord.latitude + "/" + gpsCoord.longitude + " - " +
pt2Coord.x + "/" + pt2Coord.y;
*/
- // Zoom factor after this action.
- var newZoomFactor = Math.pow(2, gMaxZoom - gPos.z + (delta > 0 ? -1 : 1));
- gPos.x -= (x - gCanvas.width / 2) * (newZoomFactor - gZoomFactor);
- gPos.y -= (y - gCanvas.height / 2) * (newZoomFactor - gZoomFactor);
-
- if (delta > 0)
- zoomIn();
- else if (delta < 0)
- zoomOut();
+
+ var newZoomLevel = gPos.z + (delta > 0 ? 1 : -1);
+ if ((newZoomLevel >= 0) && (newZoomLevel <= gMaxZoom)) {
+ // Calculate new center of the map - same point stays under the mouse.
+ // This means that the pixel distance between the old center and point
+ // must equal the pixel distance of the new center and that point.
+ var x = coordObj.clientX - gMapCanvas.offsetLeft;
+ var y = coordObj.clientY - gMapCanvas.offsetTop;
+
+ // Zoom factor after this action.
+ var newZoomFactor = Math.pow(2, gMaxZoom - newZoomLevel);
+ gPos.x -= (x - gMapCanvas.width / 2) * (newZoomFactor - gZoomFactor);
+ gPos.y -= (y - gMapCanvas.height / 2) * (newZoomFactor - gZoomFactor);
+
+ if (delta > 0)
+ zoomIn();
+ else if (delta < 0)
+ zoomOut();
+ }
break;
}
}
}
function startTracking() {
- var loopCnt = 0;
- var getStoredTrack = function() {
- if (mainDB)
- gTrackStore.getList(function(aTPoints) {
- if (gDebug)
- document.getElementById("debug").textContent = aTPoints.length + " points loaded.";
- if (aTPoints.length) {
- gTrack = aTPoints;
- }
- });
- else
- setTimeout(getStoredTrack, 100);
- loopCnt++;
- if (loopCnt > 20)
- return;
- };
- getStoredTrack();
if (gGeolocation) {
gGeoWatchID = gGeolocation.watchPosition(
function(position) {
heading: position.coords.heading,
speed: position.coords.speed},
beginSegment: !gLastTrackPoint};
- gTrack.push(tPoint);
- try { gTrackStore.push(tPoint); } catch(e) {}
- drawTrackPoint(position.coords.latitude, position.coords.longitude);
- if (gCenterPosition) {
- var posCoord = gps2xy(position.coords.latitude,
- position.coords.longitude);
- if (Math.abs(gPos.x - posCoord.x) > gCanvas.width * gZoomFactor / 4 ||
- Math.abs(gPos.y - posCoord.y) > gCanvas.height * gZoomFactor / 4) {
- gPos.x = posCoord.x;
- gPos.y = posCoord.y;
- drawMap();
+ // Only add point to track is accuracy is good enough.
+ if (tPoint.coords.accuracy < gMinTrackAccuracy) {
+ gLastTrackPoint = tPoint;
+ gTrack.push(tPoint);
+ try { gTrackStore.push(tPoint); } catch(e) {}
+ var redrawn = false;
+ if (gCenterPosition) {
+ var posCoord = gps2xy(position.coords.latitude,
+ position.coords.longitude);
+ if (Math.abs(gPos.x - posCoord.x) > gMapCanvas.width * gZoomFactor / 4 ||
+ Math.abs(gPos.y - posCoord.y) > gMapCanvas.height * gZoomFactor / 4) {
+ gPos.x = posCoord.x;
+ gPos.y = posCoord.y;
+ drawMap(); // This draws the current point as well.
+ redrawn = true;
+ }
}
+ if (!redrawn)
+ undrawCurrentLocation();
+ drawTrackPoint(position.coords.latitude, position.coords.longitude, true);
}
+ drawCurrentLocation(tPoint);
},
function(error) {
// Ignore erros for the moment, but this is good for debugging.
gTrackStore.clear();
drawMap();
}
+
+var gTileService = {
+ objStore: "tilecache",
+
+ get: function(aStyle, aCoords, aCallback) {
+ var norm = normalizeCoords(aCoords);
+ var dbkey = aStyle + "::" + norm.x + "," + norm.y + "," + norm.z;
+ this.getDBCache(dbkey, function(aResult, aEvent) {
+ if (aResult) {
+ // We did get a cached object.
+ // TODO: Look at the timestamp and trigger a reload when it's too old.
+ aCallback(aResult.image, aStyle, aCoords);
+ }
+ else {
+ // Retrieve image from the web and store it in the cache.
+ var XHR = new XMLHttpRequest();
+ XHR.open("GET",
+ gMapStyles[aStyle].url
+ .replace("{x}", norm.x)
+ .replace("{y}", norm.y)
+ .replace("{z}", norm.z)
+ .replace("[a-c]", String.fromCharCode(97 + Math.floor(Math.random() * 2)))
+ .replace("[1-4]", 1 + Math.floor(Math.random() * 3)),
+ true);
+ XHR.responseType = "blob";
+ XHR.addEventListener("load", function () {
+ if (XHR.status === 200) {
+ var blob = XHR.response;
+ gTileService.setDBCache(dbkey, {image: blob, timestamp: Date.now()});
+ aCallback(blob, aStyle, aCoords);
+ }
+ }, false);
+ XHR.send();
+ }
+ });
+ },
+
+ getDBCache: function(aKey, aCallback) {
+ if (!mainDB)
+ return;
+ var transaction = mainDB.transaction([this.objStore]);
+ var request = transaction.objectStore(this.objStore).get(aKey);
+ request.onsuccess = function(event) {
+ aCallback(request.result, event);
+ };
+ request.onerror = function(event) {
+ // Errors can be handled here.
+ aCallback(undefined, event);
+ };
+ },
+
+ setDBCache: function(aKey, aValue, aCallback) {
+ if (!mainDB)
+ return;
+ var success = false;
+ var transaction = mainDB.transaction([this.objStore], "readwrite");
+ var objStore = transaction.objectStore(this.objStore);
+ var request = objStore.put(aValue, aKey);
+ request.onsuccess = function(event) {
+ success = true;
+ if (aCallback)
+ aCallback(success, event);
+ };
+ request.onerror = function(event) {
+ // Errors can be handled here.
+ if (aCallback)
+ aCallback(success, event);
+ };
+ },
+
+ unsetDBCache: function(aKey, aCallback) {
+ if (!mainDB)
+ return;
+ var success = false;
+ var transaction = mainDB.transaction([this.objStore], "readwrite");
+ var request = transaction.objectStore(this.objStore).delete(aKey);
+ request.onsuccess = function(event) {
+ success = true;
+ if (aCallback)
+ aCallback(success, event);
+ };
+ request.onerror = function(event) {
+ // Errors can be handled here.
+ if (aCallback)
+ aCallback(success, event);
+ }
+ }
+};
projects / lantea.git / blobdiff