/* This Source Code Form is subject to the terms of the Mozilla Public
* 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 gGLMapCanvas, gTrackCanvas, gTrackContext, gGeolocation;
var gDebug = false;
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
// and http://wiki.openstreetmap.org/wiki/Tiles or http://wiki.openstreetmap.org/wiki/TMS
osm_mapnik:
{name: "OpenStreetMap (Mapnik)",
url: "https://[a-c].tile.openstreetmap.org/{z}/{x}/{y}.png",
copyright: 'Map data and imagery © OpenStreetMap contributors, ODbL/CC-BY-SA'},
osm_cyclemap:
{name: "Cycle Map (OSM)",
url: "https://[a-c].tile.thunderforest.com/cycle/{z}/{x}/{y}.png", // "http://[a-c].tile.opencyclemap.org/cycle/{z}/{x}/{y}.png",
copyright: 'Map data and imagery © OpenStreetMap contributors, ODbL/CC-BY-SA'},
osm_transmap:
{name: "Transport Map (OSM)",
url: "https://[a-c].tile.thunderforest.com/transport/{z}/{x}/{y}.png", // "http://[a-c].tile2.opencyclemap.org/transport/{z}/{x}/{y}.png",
copyright: 'Map data and imagery © OpenStreetMap contributors, ODbL/CC-BY-SA'},
osm_germany:
{name: "OSM German Style",
url: "https://tilecache[1-4].kairo.at/osmde/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at
//url: "http://[a-d].tile.openstreetmap.de/tiles/osmde/{z}/{x}/{y}.png", // https is not supported at all
copyright: 'Map data and imagery © OpenStreetMap contributors, ODbL/CC-BY-SA'},
oepnvkarte:
{name: "ÖPNV-Karte (OSM)",
url: "https://tilecache[1-4].kairo.at/oepnv/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at
//url: "http://tileserver.memomaps.de/tilegen/{z}/{x}/{y}.png", // memomaps.de does not support CORS or https at this time :(
copyright: 'Map data © OpenStreetMap contributors, ODbL/CC-BY-SA, tiles by MeMoMaps under CC-BY-SA.'},
mapquest_open:
{name: "MapQuest OSM",
url: "https://tilecache[1-4].kairo.at/mapqosm/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at
//url: "http://otile[1-4].mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.png", // https has wrong cert, akamai instead of mqcdn
copyright: 'Map data © OpenStreetMap and contributors (ODbL/CC-BY-SA), tiles courtesy of MapQuest.'},
mapquest_aerial:
{name: "MapQuest Open Aerial",
url: "https://tilecache[1-4].kairo.at/mapqsat/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at
//url: "http://otile[1-4].mqcdn.com/tiles/1.0.0/sat/{z}/{x}/{y}.jpg",
copyright: 'Tiles Courtesy of MapQuest, portions Courtesy NASA/JPL-Caltech and U.S. Depart. of Agriculture, Farm Service Agency.'},
osm_hot:
{name: "OSM HOT style",
url: "https://tilecache[1-4].kairo.at/osmhot/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at
//url: "http://[a-c].tile.openstreetmap.fr/hot/{z}/{x}/{y}.png", // https has CAcert which doesn't work in browsers
copyright: 'Map data and imagery © OpenStreetMap contributors, ODbL/CC-BY-SA'},
hikebike:
{name: "Hike and Bike (OSM)",
url: "https://tilecache[1-4].kairo.at/hikebike/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at
//url: "http://toolserver.org/tiles/hikebike/{z}/{x}/{y}.png", // toolserver.org does not support CORS at this time :(
copyright: 'Map data and imagery © OpenStreetMap contributors, ODbL/CC-BY-SA'},
outdoors:
{name: "Outdoors (OSM)",
url: "https://[a-c].tile.thunderforest.com/outdoors/{z}/{x}/{y}.png", // url: "http://[a-c].tile.opencyclemap.org/outdoors/{z}/{x}/{y}.png",
copyright: 'Map data © OpenStreetMap and contributors (ODbL/CC-BY-SA), tiles by Thunderforest.'},
stamen_toner:
{name: "Stamen Toner (B+W)",
url: "https://tilecache[1-4].kairo.at/toner/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at
//url: "http://[a-c].tile.stamen.com/toner/{z}/{x}/{y}.jpg", // https has wrong cert, .ssl.fastly.net instead of .tile.stamen.com
copyright: 'Map data © OpenStreetMap contributors, ODbL/CC-BY-SA, tiles by Stamen Design, under CC BY 3.0.'},
stamen_terrain:
{name: "Stamen Terrain (USA only)",
url: "https://tilecache[1-4].kairo.at/terrain/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at
//url: "http://[a-c].tile.stamen.com/terrain/{z}/{x}/{y}.jpg", // https has wrong cert, .ssl.fastly.net instead of .tile.stamen.com
copyright: 'Map data © OpenStreetMap contributors, ODbL/CC-BY-SA, tiles by Stamen Design, under CC BY 3.0.'},
stamen_watercolor:
{name: "Stamen Watercolor (artistic)",
url: "https://tilecache[1-4].kairo.at/watercolor/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at
//url: "http://[a-c].tile.stamen.com/watercolor/{z}/{x}/{y}.jpg", // https has wrong cert, .ssl.fastly.net instead of .tile.stamen.com
copyright: 'Map data © OpenStreetMap contributors, ODbL/CC-BY-SA, tiles by Stamen Design, under CC BY 3.0.'},
};
var gLastMouseX = 0;
var gLastMouseY = 0;
var gLoadingTile;
var gMapPrefsLoaded = false;
var gDragging = false;
var gDragTouchID, gPinchStartWidth;
var gGeoWatchID, gGPSWakeLock;
var gTrack = [];
var gLastTrackPoint, gLastDrawnPoint;
var gCenterPosition = true;
var gCurPosMapCache;
function initMap() {
gGeolocation = navigator.geolocation;
// Set up canvas context.
gGLMapCanvas = document.getElementById("map");
try {
// Try to grab the standard context. If it fails, fallback to experimental.
// We also try to tell it we do not need a depth buffer.
gMap.gl = gGLMapCanvas.getContext("webgl", {depth: false}) ||
gGLMapCanvas.getContext("experimental-webgl", {depth: false});
}
catch(e) {}
if (!gMap.gl) {
// If we don't have a GL context, give up now
showGLWarningDialog();
gMap.gl = null;
}
else {
// GL context can be lost at any time, handle that.
// See http://www.khronos.org/webgl/wiki/HandlingContextLost
gGLMapCanvas.addEventListener("webglcontextlost",
gMap.handleContextLost, false);
gGLMapCanvas.addEventListener("webglcontextrestored",
gMap.handleContextRestored, false);
}
gTrackCanvas = document.getElementById("track");
gTrackContext = gTrackCanvas.getContext("2d");
//gDebug = true;
if (gDebug) {
gGeolocation = geofake;
var hiddenList = document.getElementsByClassName("debugHide");
// last to first - list of elements with that class is changing!
for (var i = hiddenList.length - 1; i >= 0; i--) {
hiddenList[i].classList.remove("debugHide");
}
}
gAction.addEventListener("prefload-done", gMap.initGL, false);
console.log("map vars set, loading prefs...");
loadPrefs();
}
function loadPrefs(aEvent) {
if (aEvent && aEvent.type == "prefs-step") {
console.log("wait: " + gWaitCounter);
if (gWaitCounter == 0) {
gAction.removeEventListener(aEvent.type, loadPrefs, false);
gMapPrefsLoaded = true;
console.log("prefs loaded.");
gTrackCanvas.addEventListener("mouseup", mapEvHandler, false);
gTrackCanvas.addEventListener("mousemove", mapEvHandler, false);
gTrackCanvas.addEventListener("mousedown", mapEvHandler, false);
gTrackCanvas.addEventListener("mouseout", 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);
gTrackCanvas.addEventListener("wheel", mapEvHandler, false);
document.getElementById("body").addEventListener("keydown", mapEvHandler, false);
document.addEventListener("visibilitychange", visibilityEvHandler, false);
console.log("Events added.");
console.log("Init loading tile...");
gLoadingTile = new Image();
gLoadingTile.onload = function() {
console.log("Loading tile loaded.");
var throwEv = new CustomEvent("prefload-done");
gAction.dispatchEvent(throwEv);
};
console.log("Set loading tile...");
gLoadingTile.src = "style/loading.png";
}
}
else {
if (aEvent)
gAction.removeEventListener(aEvent.type, loadPrefs, false);
gAction.addEventListener("prefs-step", loadPrefs, false);
gWaitCounter++;
gPrefs.get("active_map_style", function(aValue) {
if (aValue && gMapStyles[aValue]) {
gMap.activeMap = aValue;
}
else {
gMap.activeMap = "osm_mapnik";
}
document.getElementById("mapSelector").value = gMap.activeMap;
document.getElementById("copyright").innerHTML =
gMapStyles[gMap.activeMap].copyright;
gWaitCounter--;
var throwEv = new CustomEvent("prefs-step");
gAction.dispatchEvent(throwEv);
});
gWaitCounter++;
gPrefs.get("position", function(aValue) {
if (aValue && aValue.x && aValue.y && aValue.z) {
gMap.pos = aValue;
}
gWaitCounter--;
var throwEv = new CustomEvent("prefs-step");
gAction.dispatchEvent(throwEv);
});
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--;
var throwEv = new CustomEvent("prefs-step");
gAction.dispatchEvent(throwEv);
});
gWaitCounter++;
gPrefs.get("tracking_enabled", function(aValue) {
if (aValue === undefined) {
document.getElementById("trackCheckbox").checked = true;
}
else {
document.getElementById("trackCheckbox").checked = aValue;
}
gWaitCounter--;
var throwEv = new CustomEvent("prefs-step");
gAction.dispatchEvent(throwEv);
});
gWaitCounter++;
var trackLoadStarted = false;
var redrawBase = 100;
gTrackStore.getListStepped(function(aTPoint) {
if (aTPoint) {
// Add in front and return new length.
var tracklen = gTrack.unshift(aTPoint);
// Redraw track periodically, larger distance the longer it gets
// (but clamped to the first value over a certain limit).
// Initial paint will do initial track drawing.
if (tracklen % redrawBase == 0) {
drawTrack();
if (redrawBase < 1000) {
redrawBase = tracklen;
}
}
}
else {
// Last point received.
drawTrack();
}
if (!trackLoadStarted) {
// We have the most recent point, if present, rest will load async.
trackLoadStarted = true;
gWaitCounter--;
var throwEv = new CustomEvent("prefs-step");
gAction.dispatchEvent(throwEv);
}
});
}
}
var gMap = {
gl: null,
glShaderProgram: null,
glVertexPositionAttr: null,
glTextureCoordAttr: null,
glResolutionAttr: null,
glMapTexture: null,
glTextures: {},
glTxCleanIntervalID: null,
glTexturesPerZoomLevel: 0,
activeMap: "osm_mapnik",
tileSize: 256,
maxZoom: 18, // The minimum is 0.
zoomFactor: null,
pos: {
x: 35630000.0, // Current position in the map in pixels at the maximum zoom level (18)
y: 23670000.0, // The range is 0-67108864 (2^gMap.maxZoom * gMap.tileSize)
z: 5 // This could be fractional if supported being between zoom levels.
},
baseDim: { // Map width, height and tile size in level 18 pixels.
wid: null,
ht: null,
tsize: null,
},
get width() { return gMap.gl ? gMap.gl.drawingBufferWidth : gGLMapCanvas.width; },
get height() { return gMap.gl ? gMap.gl.drawingBufferHeight : gGLMapCanvas.height; },
getVertShaderSource: function() {
return 'attribute vec2 aVertexPosition;\n' +
'attribute vec2 aTextureCoord;\n\n' +
'uniform vec2 uResolution;\n\n' +
'varying highp vec2 vTextureCoord;\n\n' +
'void main(void) {\n' +
// convert the rectangle from pixels to -1.0 to +1.0 (clipspace) 0.0 to 1.0
' vec2 clipSpace = aVertexPosition * 2.0 / uResolution - 1.0;\n' +
' gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);\n' +
' vTextureCoord = aTextureCoord;\n' +
'}'; },
getFragShaderSource: function() {
return 'varying highp vec2 vTextureCoord;\n\n' +
'uniform sampler2D uImage;\n\n' +
'void main(void) {\n' +
' gl_FragColor = texture2D(uImage, vTextureCoord);\n' +
'}'; },
initGL: function() {
// When called from the event listener, the "this" reference doesn't work, so use the object name.
console.log("Initializing WebGL...");
if (gMap.gl) {
gMap.gl.viewport(0, 0, gMap.gl.drawingBufferWidth, gMap.gl.drawingBufferHeight);
gMap.gl.clearColor(0.0, 0.0, 0.0, 0.5); // Set clear color to black, fully opaque.
gMap.gl.clear(gMap.gl.COLOR_BUFFER_BIT|gMap.gl.DEPTH_BUFFER_BIT); // Clear the color.
// Create and initialize the shaders.
console.log("Create and compile shaders...");
var vertShader = gMap.gl.createShader(gMap.gl.VERTEX_SHADER);
var fragShader = gMap.gl.createShader(gMap.gl.FRAGMENT_SHADER);
gMap.gl.shaderSource(vertShader, gMap.getVertShaderSource());
// Compile the shader program.
gMap.gl.compileShader(vertShader);
// See if it compiled successfully.
if (!gMap.gl.getShaderParameter(vertShader, gMap.gl.COMPILE_STATUS)) {
console.log("An error occurred compiling the vertex shader: " + gMap.gl.getShaderInfoLog(vertShader));
return null;
}
gMap.gl.shaderSource(fragShader, gMap.getFragShaderSource());
// Compile the shader program.
gMap.gl.compileShader(fragShader);
// See if it compiled successfully.
if (!gMap.gl.getShaderParameter(fragShader, gMap.gl.COMPILE_STATUS)) {
console.log("An error occurred compiling the fragment shader: " + gMap.gl.getShaderInfoLog(fragShader));
return null;
}
console.log("Create and link shader program...");
gMap.glShaderProgram = gMap.gl.createProgram();
gMap.gl.attachShader(gMap.glShaderProgram, vertShader);
gMap.gl.attachShader(gMap.glShaderProgram, fragShader);
gMap.gl.linkProgram(gMap.glShaderProgram);
// If creating the shader program failed, alert
if (!gMap.gl.getProgramParameter(gMap.glShaderProgram, gMap.gl.LINK_STATUS)) {
alert("Unable to initialize the shader program.");
}
gMap.gl.useProgram(gMap.glShaderProgram);
// Get locations of the attributes.
gMap.glVertexPositionAttr = gMap.gl.getAttribLocation(gMap.glShaderProgram, "aVertexPosition");
gMap.glTextureCoordAttr = gMap.gl.getAttribLocation(gMap.glShaderProgram, "aTextureCoord");
gMap.glResolutionAttr = gMap.gl.getUniformLocation(gMap.glShaderProgram, "uResolution");
console.log("Set up vertex buffer...");
var tileVerticesBuffer = gMap.gl.createBuffer();
gMap.gl.bindBuffer(gMap.gl.ARRAY_BUFFER, tileVerticesBuffer);
// The vertices are the coordinates of the corner points of the square.
var vertices = [
0.0, 0.0,
1.0, 0.0,
0.0, 1.0,
0.0, 1.0,
1.0, 0.0,
1.0, 1.0,
];
gMap.gl.bufferData(gMap.gl.ARRAY_BUFFER, new Float32Array(vertices), gMap.gl.STATIC_DRAW);
gMap.gl.enableVertexAttribArray(gMap.glTextureCoordAttr);
gMap.gl.vertexAttribPointer(gMap.glTextureCoordAttr, 2, gMap.gl.FLOAT, false, 0, 0);
gMap.loadImageToTexture(gLoadingTile, getTileKey("loading", {x: 0, y: 0, z: 0}));
gMap.gl.uniform2f(gMap.glResolutionAttr, gGLMapCanvas.width, gGLMapCanvas.height);
// Create a buffer for the position of the rectangle corners.
console.log("Set up coord buffer...");
var mapVerticesTextureCoordBuffer = gMap.gl.createBuffer();
gMap.gl.bindBuffer(gMap.gl.ARRAY_BUFFER, mapVerticesTextureCoordBuffer);
gMap.gl.enableVertexAttribArray(gMap.glVertexPositionAttr);
gMap.gl.vertexAttribPointer(gMap.glVertexPositionAttr, 2, gMap.gl.FLOAT, false, 0, 0);
// Call texture cleaning every 30 seconds, for now (is 60 better?).
gMap.glTxCleanIntervalID = window.setInterval(gMap.cleanTextures, 30 * 1000);
}
if (!gAppInitDone) {
// We may be called when context was lost and destroyed,
// only send event when we are in app startup
// (gAppInitDone is set to true right after we return this event).
var throwEv = new CustomEvent("mapinit-done");
gAction.dispatchEvent(throwEv);
}
},
draw: function() {
gMap.assembleGL();
drawTrack();
},
assembleGL: function() {
if (!gMap.gl) { return; }
document.getElementById("zoomLevel").textContent = gMap.pos.z;
gMap.zoomFactor = Math.pow(2, gMap.maxZoom - gMap.pos.z);
gMap.baseDim.wid = gMap.gl.drawingBufferWidth * gMap.zoomFactor;
gMap.baseDim.ht = gMap.gl.drawingBufferHeight * gMap.zoomFactor;
gMap.baseDim.tsize = gMap.tileSize * gMap.zoomFactor;
var xMin = gMap.pos.x - gMap.baseDim.wid / 2; // Corners of the window in level 18 pixels.
var yMin = gMap.pos.y - gMap.baseDim.ht / 2;
var xMax = gMap.pos.x + gMap.baseDim.wid / 2;
var yMax = gMap.pos.y + gMap.baseDim.ht / 2;
if (gMapPrefsLoaded && mainDB)
gPrefs.set("position", gMap.pos);
// Go through all the tiles in the map, find out if to draw them and do so.
for (var x = Math.floor(xMin / gMap.baseDim.tsize); x < Math.ceil(xMax / gMap.baseDim.tsize); x++) {
for (var y = Math.floor(yMin / gMap.baseDim.tsize); y < Math.ceil(yMax / gMap.baseDim.tsize); y++) {
// Only go to loading step if we haven't loaded the texture.
var coords = {x: x, y: y, z: gMap.pos.z};
var tileKey = getTileKey(gMap.activeMap, normalizeCoords(coords));
if (!gMap.glTextures[tileKey]) {
// Initiate loading/drawing of the actual tile.
gTileService.get(gMap.activeMap, coords,
function(aImage, aStyle, aCoords, aTileKey) {
// Only actually load if this still applies for the current view.
if ((aStyle == gMap.activeMap) && (aCoords.z == gMap.pos.z)) {
var URL = window.URL;
var imgURL = URL.createObjectURL(aImage);
var imgObj = new Image();
imgObj.onload = function() {
gMap.loadImageToTexture(imgObj, aTileKey);
if (document.hidden != true) { // Only draw if we're actually visible.
window.requestAnimationFrame(function(aTimestamp) { gMap.drawGL() });
}
URL.revokeObjectURL(imgURL);
}
imgObj.src = imgURL;
}
});
}
}
}
if (document.hidden != true) { // Only draw if we're actually visible.
window.requestAnimationFrame(function(aTimestamp) { gMap.drawGL() });
}
},
drawGL: function() {
var xMin = gMap.pos.x - gMap.baseDim.wid / 2; // Corners of the window in level 18 pixels.
var yMin = gMap.pos.y - gMap.baseDim.ht / 2;
var xMax = gMap.pos.x + gMap.baseDim.wid / 2;
var yMax = gMap.pos.y + gMap.baseDim.ht / 2;
// Go through all the tiles in the map, find out if to draw them and do so.
for (var x = Math.floor(xMin / gMap.baseDim.tsize); x < Math.ceil(xMax / gMap.baseDim.tsize); x++) {
for (var y = Math.floor(yMin / gMap.baseDim.tsize); y < Math.ceil(yMax / gMap.baseDim.tsize); y++) {
// Rounding the pixel offsets ensures we position the tiles precisely.
var xoff = Math.round((x * gMap.baseDim.tsize - xMin) / gMap.zoomFactor);
var yoff = Math.round((y * gMap.baseDim.tsize - yMin) / gMap.zoomFactor);
// Draw the tile, first find out the actual texture to use.
var norm = normalizeCoords({x: x, y: y, z: gMap.pos.z});
var tileKey = getTileKey(gMap.activeMap, norm);
if (!gMap.glTextures[tileKey]) {
tileKey = getTileKey("loading", {x: 0, y: 0, z: 0});
}
gMap.drawTileGL(xoff, yoff, tileKey);
}
}
},
resizeAndDraw: function() {
var viewportWidth = Math.min(window.innerWidth, window.outerWidth);
var viewportHeight = Math.min(window.innerHeight, window.outerHeight);
if (gGLMapCanvas && gTrackCanvas) {
gGLMapCanvas.width = viewportWidth;
gGLMapCanvas.height = viewportHeight;
gTrackCanvas.width = viewportWidth;
gTrackCanvas.height = viewportHeight;
if (gMap.gl) {
// Size viewport to canvas size.
gMap.gl.viewport(0, 0, gMap.gl.drawingBufferWidth, gMap.gl.drawingBufferHeight);
// Clear the color.
gMap.gl.clear(gMap.gl.COLOR_BUFFER_BIT);
// Make sure the vertex shader get the right resolution.
gMap.gl.uniform2f(gMap.glResolutionAttr, gGLMapCanvas.width, gGLMapCanvas.height);
// Prepare recalculation of textures to keep for one zoom level.
gMap.glTexturesPerZoomLevel = 0;
}
gMap.draw();
showUI();
}
},
drawTileGL: function(aLeft, aRight, aTileKey) {
gMap.gl.activeTexture(gMap.gl.TEXTURE0);
gMap.gl.bindTexture(gMap.gl.TEXTURE_2D, gMap.glTextures[aTileKey]);
// Set uImage to refer to TEXTURE0
gMap.gl.uniform1i(gMap.gl.getUniformLocation(gMap.glShaderProgram, "uImage"), 0);
var x_start = aLeft;
var i_width = gMap.tileSize;
var y_start = aRight;
var i_height = gMap.tileSize;
var textureCoordinates = [
x_start, y_start,
x_start + i_width, y_start,
x_start, y_start + i_height,
x_start, y_start + i_height,
x_start + i_width, y_start,
x_start + i_width, y_start + i_height,
];
gMap.gl.bufferData(gMap.gl.ARRAY_BUFFER, new Float32Array(textureCoordinates), gMap.gl.STATIC_DRAW);
// There are 6 indices in textureCoordinates.
gMap.gl.drawArrays(gMap.gl.TRIANGLES, 0, 6);
},
loadImageToTexture: function(aImage, aTileKey) {
// Create and bind texture.
gMap.glTextures[aTileKey] = gMap.gl.createTexture();
gMap.gl.bindTexture(gMap.gl.TEXTURE_2D, gMap.glTextures[aTileKey]);
// Set params for how the texture minifies and magnifies (wrap params are not needed as we're power-of-two).
gMap.gl.texParameteri(gMap.gl.TEXTURE_2D, gMap.gl.TEXTURE_MIN_FILTER, gMap.gl.NEAREST);
gMap.gl.texParameteri(gMap.gl.TEXTURE_2D, gMap.gl.TEXTURE_MAG_FILTER, gMap.gl.NEAREST);
// Upload the image into the texture.
gMap.gl.texImage2D(gMap.gl.TEXTURE_2D, 0, gMap.gl.RGBA, gMap.gl.RGBA, gMap.gl.UNSIGNED_BYTE, aImage);
},
cleanTextures: function() {
// Get rid of unneeded textures to save memory.
// TODO: Be less aggressive, maybe keep neighboring zoom levels (but x/y coords there are zoom-specific).
if (!gMap.glTexturesPerZoomLevel) {
// Calculate how many textures we need to keep for one zoom level.
// ceil(width/size) gives us the minimum, keep one on either side as well.
gMap.glTexturesPerZoomLevel =
Math.ceil(gMap.gl.drawingBufferWidth / gMap.tileSize + 2) *
Math.ceil(gMap.gl.drawingBufferHeight / gMap.tileSize + 2);
console.log("Keeping " + gMap.glTexturesPerZoomLevel + " textures per level");
}
if (Object.keys(gMap.glTextures).length > gMap.glTexturesPerZoomLevel) {
console.log("Cleaning textures... (have " + Object.keys(gMap.glTextures).length + " atm)");
// Find coordinate ranges for tiles to keep.
var tMin = normalizeCoords({x: Math.floor((gMap.pos.x - gMap.baseDim.wid / 2) / gMap.baseDim.tsize) - 1,
y: Math.floor((gMap.pos.y - gMap.baseDim.ht / 2) / gMap.baseDim.tsize) - 1,
z: gMap.pos.z});
var tMax = normalizeCoords({x: Math.ceil((gMap.pos.x + gMap.baseDim.wid / 2) / gMap.baseDim.tsize) + 1,
y: Math.ceil((gMap.pos.y + gMap.baseDim.ht / 2) / gMap.baseDim.tsize) + 1,
z: gMap.pos.z});
console.log("In range: " + tMin.x + "," + tMin.y + "," + tMin.z + " - " + tMax.x + "," + tMax.y + "," + tMax.z);
for (var tileKey in gMap.glTextures) {
var keyMatches = tileKey.match(/([^:]+)::(\d+),(\d+),(\d+)/);
if (keyMatches && keyMatches[1] != "loading") {
var txData = {
style: keyMatches[1],
x: keyMatches[2],
y: keyMatches[3],
z: keyMatches[4],
}
var delTx = false;
if (txData.style != gMap.activeMap) { delTx = true; console.log("Different map style: " + txData.style); }
if (!delTx && (txData.z < tMin.z || txData.z > tMax.z)) { delTx = true; console.log("Out-of-range zoom: " + txData.z); }
if (tMin.x < tMax.x) {
if (!delTx && (txData.x < tMin.x || txData.x > tMax.x)) { delTx = true; console.log("Out-of-range X: " + txData.x); }
}
else {
// We are crossing over the 0 coordinate!
if (!delTx && (txData.x < tMin.x && txData.x > tMax.x)) { delTx = true; console.log("Out-of-range X: " + txData.x); }
}
if (tMin.y < tMax.y) {
if (!delTx && (txData.y < tMin.y || txData.y > tMax.y)) { delTx = true; console.log("Out-of-range Y: " + txData.y); }
}
else {
// We are crossing over the 0 coordinate!
if (!delTx && (txData.y < tMin.y && txData.y > tMax.y)) { delTx = true; console.log("Out-of-range Y: " + txData.y); }
}
if (delTx) {
// Delete texture from GL and from the array we are holding.
gMap.gl.deleteTexture(gMap.glTextures[tileKey]);
delete gMap.glTextures[tileKey];
}
}
}
console.log("Cleaning complete, " + Object.keys(gMap.glTextures).length + " textures left");
}
},
handleContextLost: function(event) {
event.preventDefault();
// GL context is gone, let's reset everything that depends on it.
clearInterval(gMap.glTxCleanIntervalID);
gMap.glTextures = {};
},
handleContextRestored: function(event) {
// When GL context is back, init GL again and draw.
gMap.initGL();
gMap.draw();
},
}
// Using scale(x, y) together with drawing old data on scaled canvas would be an improvement for zooming.
// See https://developer.mozilla.org/en-US/docs/Canvas_tutorial/Transformations#Scaling
function zoomIn() {
if (gMap.pos.z < gMap.maxZoom) {
gMap.pos.z++;
gMap.draw();
}
}
function zoomOut() {
if (gMap.pos.z > 0) {
gMap.pos.z--;
gMap.draw();
}
}
function zoomTo(aTargetLevel) {
aTargetLevel = parseInt(aTargetLevel);
if (aTargetLevel >= 0 && aTargetLevel <= gMap.maxZoom) {
gMap.pos.z = aTargetLevel;
gMap.draw();
}
}
function gps2xy(aLatitude, aLongitude) {
var maxZoomFactor = Math.pow(2, gMap.maxZoom) * gMap.tileSize;
var convLat = aLatitude * Math.PI / 180;
var rawY = (1 - Math.log(Math.tan(convLat) +
1 / Math.cos(convLat)) / Math.PI) / 2 * maxZoomFactor;
var rawX = (aLongitude + 180) / 360 * maxZoomFactor;
return {x: Math.round(rawX),
y: Math.round(rawY)};
}
function xy2gps(aX, aY) {
var maxZoomFactor = Math.pow(2, gMap.maxZoom) * gMap.tileSize;
var n = Math.PI - 2 * Math.PI * aY / maxZoomFactor;
return {latitude: 180 / Math.PI *
Math.atan(0.5 * (Math.exp(n) - Math.exp(-n))),
longitude: aX / maxZoomFactor * 360 - 180};
}
function setMapStyle() {
var mapSel = document.getElementById("mapSelector");
if (mapSel.selectedIndex >= 0 && gMap.activeMap != mapSel.value) {
gMap.activeMap = mapSel.value;
gPrefs.set("active_map_style", gMap.activeMap);
document.getElementById("copyright").innerHTML =
gMapStyles[gMap.activeMap].copyright;
if (!gWaitCounter) { // Only do this when prefs are loaded already.
showUI();
gMap.draw();
}
}
}
// A sane mod function that works for negative numbers.
// Returns a % b.
function mod(a, b) {
return ((a % b) + b) % b;
}
function normalizeCoords(aCoords) {
var zoomFactor = Math.pow(2, aCoords.z);
return {x: mod(aCoords.x, zoomFactor),
y: mod(aCoords.y, zoomFactor),
z: aCoords.z};
}
function getTileKey(aStyle, aNormalizedCoords) {
return aStyle + "::" +
aNormalizedCoords.x + "," +
aNormalizedCoords.y + "," +
aNormalizedCoords.z;
}
// Returns true if the tile is outside the current view.
function isOutsideWindow(t) {
var pos = decodeIndex(t);
var zoomFactor = Math.pow(2, gMap.maxZoom - pos.z);
var wid = gMap.width * zoomFactor;
var ht = gMap.height * zoomFactor;
pos.x *= zoomFactor;
pos.y *= zoomFactor;
var sz = gMap.tileSize * zoomFactor;
if (pos.x > gMap.pos.x + wid / 2 || pos.y > gMap.pos.y + ht / 2 ||
pos.x + sz < gMap.pos.x - wid / 2 || pos.y - sz < gMap.pos.y - ht / 2)
return true;
return false;
}
function encodeIndex(x, y, z) {
var norm = normalizeCoords({x: x, y: y, z: z});
return norm.x + "," + norm.y + "," + norm.z;
}
function decodeIndex(encodedIdx) {
var ind = encodedIdx.split(",", 3);
return {x: ind[0], y: ind[1], z: ind[2]};
}
function drawTrack() {
if (gTrackContext && (document.hidden != true)) { // Only draw if we're actually visible.
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,
(i + 1 >= gTrack.length || gTrack[i+1].beginSegment));
}
}
}
}
function drawTrackPoint(aLatitude, aLongitude, lastPoint) {
var trackpoint = gps2xy(aLatitude, aLongitude);
// lastPoint is for optimizing (not actually executing the draw until the last)
trackpoint.segmentEnd = (lastPoint === true);
trackpoint.optimized = (lastPoint === false);
trackpoint.mappos = {x: Math.round((trackpoint.x - gMap.pos.x) / gMap.zoomFactor + gMap.width / 2),
y: Math.round((trackpoint.y - gMap.pos.y) / gMap.zoomFactor + gMap.height / 2)};
if (gLastDrawnPoint) {
// Lines completely outside the current display should not be drawn.
trackpoint.skip_drawing = false;
if ((trackpoint.mappos.x < 0 && gLastDrawnPoint.mappos.x < 0) ||
(trackpoint.mappos.x > gMap.width && gLastDrawnPoint.mappos.x > gMap.width) ||
(trackpoint.mappos.y < 0 && gLastDrawnPoint.mappos.y < 0) ||
(trackpoint.mappos.y > gMap.height && gLastDrawnPoint.mappos.y > gMap.height)) {
trackpoint.skip_drawing = true;
}
}
if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) {
gTrackContext.strokeStyle = gTrackColor;
gTrackContext.fillStyle = gTrackContext.strokeStyle;
gTrackContext.lineWidth = gTrackWidth;
gTrackContext.lineCap = "round";
gTrackContext.lineJoin = "round";
}
// This breaks optimiziation, so make sure to reset optimization.
if (trackpoint.skip_drawing || !gLastDrawnPoint) {
trackpoint.optimized = false;
// Close path if one was open.
if (gLastDrawnPoint && gLastDrawnPoint.optimized) {
gTrackContext.stroke();
}
}
if (!trackpoint.skip_drawing) {
if (gLastDrawnPoint && gLastDrawnPoint.skip_drawing && !gLastDrawnPoint.segmentEnd) {
// If the last point was skipped but the current one isn't, draw a segment start
// for the off-screen previous one as well as a connection line.
gTrackContext.beginPath();
gTrackContext.arc(gLastDrawnPoint.mappos.x, gLastDrawnPoint.mappos.y,
gTrackContext.lineWidth, 0, Math.PI * 2, false);
gTrackContext.fill();
gTrackContext.lineTo(trackpoint.mappos.x, trackpoint.mappos.y);
}
else if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) {
// Start drawing a segment with the current point.
gTrackContext.beginPath();
gTrackContext.arc(trackpoint.mappos.x, trackpoint.mappos.y,
gTrackContext.lineWidth, 0, Math.PI * 2, false);
gTrackContext.fill();
}
else if (gLastDrawnPoint &&
Math.abs(gLastDrawnPoint.mappos.x - trackpoint.mappos.x) <= 1 &&
Math.abs(gLastDrawnPoint.mappos.y - trackpoint.mappos.y) <= 1) {
// We would draw the same or almost the same point, don't do any actual drawing.
}
else {
// Continue drawing segment, close if needed.
gTrackContext.lineTo(trackpoint.mappos.x, trackpoint.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 - gMap.pos.x) / gMap.zoomFactor + gMap.width / 2),
y: Math.round((locpoint.y - gMap.pos.y) / gMap.zoomFactor + gMap.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 - gMap.pos.x) / gMap.zoomFactor + gMap.width / 2),
y: Math.round((oldpoint.y - gMap.pos.y) / gMap.zoomFactor + gMap.height / 2)};
gTrackContext.putImageData(gCurPosMapCache.data,
oldmp.x - gCurPosMapCache.radius,
oldmp.y - gCurPosMapCache.radius);
gCurPosMapCache = undefined;
}
}
function calcTrackDuration() {
// Get the duration of the track in s.
var tDuration = 0;
if (gTrack.length > 1) {
for (var i = 1; i < gTrack.length; i++) {
if (!gTrack[i].beginSegment) {
tDuration += (gTrack[i].time - gTrack[i-1].time);
}
}
}
return Math.round(tDuration / 1000); // The timestamps are in ms but we return seconds.
}
function calcTrackLength() {
// Get the length of the track in km.
var tLength = 0;
if (gTrack.length > 1) {
for (var i = 1; i < gTrack.length; i++) {
if (!gTrack[i].beginSegment) {
tLength += getPointDistance(gTrack[i-1].coords, gTrack[i].coords);
}
}
}
return tLength;
}
function getPointDistance(aGPSPoint1, aGPSPoint2) {
// Get the distance in km between the two given GPS points.
// See http://stackoverflow.com/questions/365826/calculate-distance-between-2-gps-coordinates
// Earth is almost exactly a sphere and we calculate small distances on the surface, so we can do spherical great-circle math.
// Also see http://en.wikipedia.org/wiki/Great-circle_distance
var R = 6371; // km
var dLat = deg2rad(aGPSPoint2.latitude - aGPSPoint1.latitude);
var dLon = deg2rad(aGPSPoint2.longitude - aGPSPoint1.longitude);
var lat1 = deg2rad(aGPSPoint1.latitude);
var lat2 = deg2rad(aGPSPoint2.latitude);
var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
Math.sin(dLon/2) * Math.sin(dLon/2) * Math.cos(lat1) * Math.cos(lat2);
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
return R * c;
}
function deg2rad(aDegreeValue) {
// Convert an angle in degrees to radiants.
return aDegreeValue * (Math.PI / 180);
}
var mapEvHandler = {
handleEvent: function(aEvent) {
var touchEvent = aEvent.type.indexOf('touch') != -1;
if (touchEvent) {
aEvent.stopPropagation();
}
// Bail out if the event is happening on an input.
if (aEvent.target.tagName.toLowerCase() == "input")
return;
// Bail out on unwanted map moves, but not zoom or keyboard events.
if (aEvent.type.indexOf("mouse") === 0 || aEvent.type.indexOf("touch") === 0) {
// Bail out if this is neither a touch nor left-click.
if (!touchEvent && aEvent.button != 0)
return;
// Bail out if the started touch can't be found.
if (touchEvent && gDragging &&
!aEvent.targetTouches.item(0))
return;
}
var coordObj = touchEvent ?
aEvent.targetTouches.item(0) :
aEvent;
switch (aEvent.type) {
case "mousedown":
case "touchstart":
if (touchEvent) {
if (aEvent.targetTouches.length == 2) {
gPinchStartWidth = Math.sqrt(
Math.pow(aEvent.targetTouches.item(1).clientX -
aEvent.targetTouches.item(0).clientX, 2) +
Math.pow(aEvent.targetTouches.item(1).clientY -
aEvent.targetTouches.item(0).clientY, 2)
);
}
coordObj = aEvent.targetTouches.item(0);
}
var x = coordObj.clientX - gGLMapCanvas.offsetLeft;
var y = coordObj.clientY - gGLMapCanvas.offsetTop;
if (touchEvent || aEvent.button === 0) {
gDragging = true;
}
gLastMouseX = x;
gLastMouseY = y;
showUI();
break;
case "mousemove":
case "touchmove":
if (touchEvent && aEvent.targetTouches.length == 2) {
curPinchStartWidth = Math.sqrt(
Math.pow(aEvent.targetTouches.item(1).clientX -
aEvent.targetTouches.item(0).clientX, 2) +
Math.pow(aEvent.targetTouches.item(1).clientY -
aEvent.targetTouches.item(0).clientY, 2)
);
if (!gPinchStartWidth)
gPinchStartWidth = curPinchStartWidth;
if (gPinchStartWidth / curPinchStartWidth > 1.7 ||
gPinchStartWidth / curPinchStartWidth < 0.6) {
var newZoomLevel = gMap.pos.z + (gPinchStartWidth < curPinchStartWidth ? 1 : -1);
if ((newZoomLevel >= 0) && (newZoomLevel <= gMap.maxZoom)) {
// Calculate new center of the map - preserve middle of pinch.
// This means that pixel distance between old center and middle
// must equal pixel distance of new center and middle.
var x = (aEvent.targetTouches.item(1).clientX +
aEvent.targetTouches.item(0).clientX) / 2 -
gGLMapCanvas.offsetLeft;
var y = (aEvent.targetTouches.item(1).clientY +
aEvent.targetTouches.item(0).clientY) / 2 -
gGLMapCanvas.offsetTop;
// Zoom factor after this action.
var newZoomFactor = Math.pow(2, gMap.maxZoom - newZoomLevel);
gMap.pos.x -= (x - gMap.width / 2) * (newZoomFactor - gMap.zoomFactor);
gMap.pos.y -= (y - gMap.height / 2) * (newZoomFactor - gMap.zoomFactor);
if (gPinchStartWidth < curPinchStartWidth)
zoomIn();
else
zoomOut();
// Reset pinch start width and start another pinch gesture.
gPinchStartWidth = null;
}
}
// If we are in a pinch, do not drag.
break;
}
var x = coordObj.clientX - gGLMapCanvas.offsetLeft;
var y = coordObj.clientY - gGLMapCanvas.offsetTop;
if (gDragging === true) {
var dX = x - gLastMouseX;
var dY = y - gLastMouseY;
gMap.pos.x -= dX * gMap.zoomFactor;
gMap.pos.y -= dY * gMap.zoomFactor;
gMap.draw();
showUI();
}
gLastMouseX = x;
gLastMouseY = y;
break;
case "mouseup":
case "touchend":
gPinchStartWidth = null;
gDragging = false;
showUI();
break;
case "mouseout":
case "touchcancel":
case "touchleave":
//gDragging = false;
break;
case "wheel":
// If we'd want pixels, we'd need to calc up using aEvent.deltaMode.
// See https://developer.mozilla.org/en-US/docs/Mozilla_event_reference/wheel
// Only accept (non-null) deltaY values
if (!aEvent.deltaY)
break;
// Debug output: "coordinates" of the point the mouse was over.
/*
var ptCoord = {x: gMap.pos.x + (x - gMap.width / 2) * gMap.zoomFactor,
y: gMap.pos.y + (x - gMap.height / 2) * gMap.zoomFactor};
var gpsCoord = xy2gps(ptCoord.x, ptCoord.y);
var pt2Coord = gps2xy(gpsCoord.latitude, gpsCoord.longitude);
console.log(ptCoord.x + "/" + ptCoord.y + " - " +
gpsCoord.latitude + "/" + gpsCoord.longitude + " - " +
pt2Coord.x + "/" + pt2Coord.y);
*/
var newZoomLevel = gMap.pos.z + (aEvent.deltaY < 0 ? 1 : -1);
if ((newZoomLevel >= 0) && (newZoomLevel <= gMap.maxZoom)) {
// 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 - gGLMapCanvas.offsetLeft;
var y = coordObj.clientY - gGLMapCanvas.offsetTop;
// Zoom factor after this action.
var newZoomFactor = Math.pow(2, gMap.maxZoom - newZoomLevel);
gMap.pos.x -= (x - gMap.width / 2) * (newZoomFactor - gMap.zoomFactor);
gMap.pos.y -= (y - gMap.height / 2) * (newZoomFactor - gMap.zoomFactor);
if (aEvent.deltaY < 0)
zoomIn();
else
zoomOut();
}
break;
case "keydown":
// Allow keyboard control to move and zoom the map.
// Should use aEvent.key instead of aEvent.which but needs bug 680830.
// See https://developer.mozilla.org/en-US/docs/DOM/Mozilla_event_reference/keydown
var dX = 0;
var dY = 0;
switch (aEvent.which) {
case 39: // right
dX = -gMap.tileSize / 2;
break;
case 37: // left
dX = gMap.tileSize / 2;
break;
case 38: // up
dY = gMap.tileSize / 2;
break;
case 40: // down
dY = -gMap.tileSize / 2;
break;
case 87: // w
case 107: // + (numpad)
case 171: // + (normal key)
zoomIn();
break;
case 83: // s
case 109: // - (numpad)
case 173: // - (normal key)
zoomOut();
break;
case 48: // 0
case 49: // 1
case 50: // 2
case 51: // 3
case 52: // 4
case 53: // 5
case 54: // 6
case 55: // 7
case 56: // 8
zoomTo(aEvent.which - 38);
break;
case 57: // 9
zoomTo(9);
break;
case 96: // 0 (numpad)
case 97: // 1 (numpad)
case 98: // 2 (numpad)
case 99: // 3 (numpad)
case 100: // 4 (numpad)
case 101: // 5 (numpad)
case 102: // 6 (numpad)
case 103: // 7 (numpad)
case 104: // 8 (numpad)
zoomTo(aEvent.which - 86);
break;
case 105: // 9 (numpad)
zoomTo(9);
break;
default: // not supported
console.log("key not supported: " + aEvent.which);
break;
}
// Move if needed.
if (dX || dY) {
gMap.pos.x -= dX * gMap.zoomFactor;
gMap.pos.y -= dY * gMap.zoomFactor;
gMap.draw();
}
break;
}
}
};
function visibilityEvHandler() {
// Immediately draw if we just got visible.
if (document.hidden != true) {
gMap.draw();
}
// No need to handle the event where we become invisible as we care only draw
// when we are visible anyhow.
}
var geofake = {
tracking: false,
lastPos: {x: undefined, y: undefined},
watchPosition: function(aSuccessCallback, aErrorCallback, aPrefObject) {
this.tracking = true;
var watchCall = function() {
// calc new position in lat/lon degrees
// 90° on Earth surface are ~10,000 km at the equator,
// so try moving at most 10m at a time
if (geofake.lastPos.x)
geofake.lastPos.x += (Math.random() - .5) * 90 / 1000000
else
geofake.lastPos.x = 48.208174
if (geofake.lastPos.y)
geofake.lastPos.y += (Math.random() - .5) * 90 / 1000000
else
geofake.lastPos.y = 16.373819
aSuccessCallback({timestamp: Date.now(),
coords: {latitude: geofake.lastPos.x,
longitude: geofake.lastPos.y,
accuracy: 20}});
if (geofake.tracking)
setTimeout(watchCall, 1000);
};
setTimeout(watchCall, 1000);
return "foo";
},
clearWatch: function(aID) {
this.tracking = false;
}
}
function setCentering(aCheckbox) {
if (gMapPrefsLoaded && mainDB)
gPrefs.set("center_map", aCheckbox.checked);
gCenterPosition = aCheckbox.checked;
}
function setTracking(aCheckbox) {
if (gMapPrefsLoaded && mainDB)
gPrefs.set("tracking_enabled", aCheckbox.checked);
if (aCheckbox.checked)
startTracking();
else
endTracking();
}
function startTracking() {
if (gGeolocation) {
gActionLabel.textContent = "Establishing Position";
gAction.style.display = "block";
if (navigator.requestWakeLock) {
gGPSWakeLock = navigator.requestWakeLock("gps");
}
gGeoWatchID = gGeolocation.watchPosition(
function(position) {
if (gActionLabel.textContent) {
gActionLabel.textContent = "";
gAction.style.display = "none";
}
// Coords spec: https://developer.mozilla.org/en/XPCOM_Interface_Reference/NsIDOMGeoPositionCoords
var tPoint = {time: position.timestamp,
coords: {latitude: position.coords.latitude,
longitude: position.coords.longitude,
altitude: position.coords.altitude,
accuracy: position.coords.accuracy,
altitudeAccuracy: position.coords.altitudeAccuracy,
heading: position.coords.heading,
speed: position.coords.speed},
beginSegment: !gLastTrackPoint};
// 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(gMap.pos.x - posCoord.x) > gMap.width * gMap.zoomFactor / 4 ||
Math.abs(gMap.pos.y - posCoord.y) > gMap.height * gMap.zoomFactor / 4) {
gMap.pos.x = posCoord.x;
gMap.pos.y = posCoord.y;
gMap.draw(); // 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.
// See https://developer.mozilla.org/en/Using_geolocation#Handling_errors
if (gDebug)
console.log(error.message);
},
{enableHighAccuracy: true}
);
}
}
function endTracking() {
if (gActionLabel.textContent) {
gActionLabel.textContent = "";
gAction.style.display = "none";
}
if (navigator.requestWakeLock && gGPSWakeLock) {
console.log("releasing WakeLock");
gGPSWakeLock.unlock();
}
if (gGeoWatchID) {
gGeolocation.clearWatch(gGeoWatchID);
}
}
function clearTrack() {
gTrack = [];
gTrackStore.clear();
drawTrack();
}
function loadTrack(aTrackId) {
fetchBackend("track_json?id=" + encodeURIComponent(aTrackId), "GET", null,
function(aResult, aStatusCode) {
if (aStatusCode >= 400 || !aResult) {
console.log("loading track failed: " + aStatusCode + ", result: " + aResult.message);
}
else {
console.log("loading track with " + aResult.length + " points.");
gTrack = aResult;
for (var i = 0; i < gTrack.length; i++) {
try { gTrackStore.push(gTrack[i]); } catch(e) {}
}
drawTrack();
}
}
);
}
var gTileService = {
objStore: "tilecache",
ageLimit: 14 * 86400 * 1000, // 2 weeks (in ms)
get: function(aStyle, aCoords, aCallback) {
var norm = normalizeCoords(aCoords);
var dbkey = getTileKey(aStyle, norm);
this.getDBCache(dbkey, function(aResult, aEvent) {
if (aResult) {
// We did get a cached object.
aCallback(aResult.image, aStyle, aCoords, dbkey);
// Look at the timestamp and return if it's not too old.
if (aResult.timestamp + gTileService.ageLimit > Date.now())
return;
// Reload cached tile otherwise.
var oldDate = new Date(aResult.timestamp);
console.log("reload cached tile: " + dbkey + " - " + oldDate.toUTCString());
}
// 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() * 3)))
.replace("[a-d]", String.fromCharCode(97 + Math.floor(Math.random() * 4)))
.replace("[1-4]", 1 + Math.floor(Math.random() * 4)),
true);
XHR.responseType = "blob";
XHR.addEventListener("load", function () {
if (XHR.status === 200) {
var blob = XHR.response;
aCallback(blob, aStyle, aCoords, dbkey);
gTileService.setDBCache(dbkey, {image: blob, timestamp: Date.now()});
}
}, 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);
}
},
clearDB: function(aCallback) {
if (!mainDB)
return;
var success = false;
var transaction = mainDB.transaction([this.objStore], "readwrite");
var request = transaction.objectStore(this.objStore).clear();
request.onsuccess = function(event) {
success = true;
console.log("Cache cleared.");
if (aCallback)
aCallback(success, event);
};
request.onerror = function(event) {
// Errors can be handled here.
console.log("Error clearing cache!");
if (aCallback)
aCallback(success, event);
}
}
};