X-Git-Url: https://git-public.kairo.at/?p=lantea.git;a=blobdiff_plain;f=js%2Fmap.js;h=e999fb85176c8ad123aaeae020efbd5e3a05121e;hp=869ce2c13c2227a6a680afa2fd80f70fbdf0f43e;hb=b9707ee0b1b3aa200085539b2894a811bf67f650;hpb=b47b4a65e0de47e607e0f675402e69239d012ad6 diff --git a/js/map.js b/js/map.js index 869ce2c..e999fb8 100644 --- a/js/map.js +++ b/js/map.js @@ -1,131 +1,520 @@ -/* ***** BEGIN LICENSE BLOCK ***** - * Version: MPL 1.1/GPL 2.0/LGPL 2.1 - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * http://www.mozilla.org/MPL/ - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - * - * The Original Code is Lantea mapping/tracking web app. - * - * The Initial Developer of the Original Code is - * Robert Kaiser . - * Portions created by the Initial Developer are Copyright (C) 2011 - * the Initial Developer. All Rights Reserved. - * - * Contributor(s): - * Robert Kaiser - * - * Alternatively, the contents of this file may be used under the terms of - * either the GNU General Public License Version 2 or later (the "GPL"), or - * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), - * in which case the provisions of the GPL or the LGPL are applicable instead - * of those above. If you wish to allow use of your version of this file only - * under the terms of either the GPL or the LGPL, and not to allow others to - * use your version of this file under the terms of the MPL, indicate your - * decision by deleting the provisions above and replace them with the notice - * and other provisions required by the GPL or the LGPL. If you do not delete - * the provisions above, a recipient may use your version of this file under - * the terms of any one of the MPL, the GPL or the LGPL. - * - * ***** END LICENSE BLOCK ***** */ - -var gCanvas, gContext; - -var gTileSize = 256; -var gMaxZoom = 18; // The minimum is 0. +/* 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 osm_mapnik: {name: "OpenStreetMap (Mapnik)", url: "http://tile.openstreetmap.org/{z}/{x}/{y}.png", - copyright: 'Map data and imagery © OpenStreetMap contributors, CC-BY-SA'}, - osm_tilesathome: - {name: "OpenStreetMap (OSMarender)", - url: "http://tah.openstreetmap.org/Tiles/tile/{z}/{x}/{y}.png", - copyright: 'Map data and imagery © OpenStreetMap contributors, CC-BY-SA'}, + copyright: 'Map data and imagery © OpenStreetMap contributors, ODbL/CC-BY-SA'}, + osm_cyclemap: + {name: "Cycle Map (OSM)", + url: "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: "http://[a-c].tile2.opencyclemap.org/transport/{z}/{x}/{y}.png", + copyright: 'Map data and imagery © OpenStreetMap contributors, ODbL/CC-BY-SA'}, mapquest_open: - {name: "MapQuest Open", - url: "http://otile1.mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.png", - copyright: 'Data, imagery and map information provided by MapQuest, OpenStreetMap and contributors, CC-BY-SA.'} + {name: "MapQuest OSM", + url: "http://otile[1-4].mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.png", + copyright: 'Map data © OpenStreetMap and contributors (ODbL/CC-BY-SA), tiles Courtesy of MapQuest.'}, + mapquest_aerial: + {name: "MapQuest Open Aerial", + 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.'}, + 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 OpenGeoServer.org, CC-BY 3.0 AT.'}, + google_map: + {name: "Google Maps", + url: " http://mt1.google.com/vt/x={x}&y={y}&z={z}", + copyright: 'Map data and imagery © Google'}, }; -var gActiveMap = "osm_mapnik"; - -var gPos = {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^gMaxZoom * gTileSize) - z: 5.0}; // This can be fractional if we are between zoom levels. var gLastMouseX = 0; var gLastMouseY = 0; -// Used as an assiciative array. They keys have to be strings, ours will be "xindex,yindex,zindex" e.g. "13,245,12". -var gTiles = {}; +var gLoadingTile; + +var gMapPrefsLoaded = false; var gDragging = false; -var gZoomTouchID; +var gDragTouchID, gPinchStartWidth; + +var gGeoWatchID; +var gTrack = []; +var gLastTrackPoint, gLastDrawnPoint; +var gCenterPosition = true; + +var gCurPosMapCache; function initMap() { - gCanvas = document.getElementById("map"); - gContext = gCanvas.getContext("2d"); - if (!gActiveMap) - gActiveMap = "osm_mapnik"; - - gCanvas.addEventListener("mouseup", mapEvHandler, false); - gCanvas.addEventListener("mousemove", mapEvHandler, false); - gCanvas.addEventListener("mousedown", mapEvHandler, false); - gCanvas.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); - - gCanvas.addEventListener("DOMMouseScroll", mapEvHandler, false); - gCanvas.addEventListener("mousewheel", mapEvHandler, false); - - document.getElementById("copyright").innerHTML = - gMapStyles[gActiveMap].copyright; + 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 we don't have a GL context, give up now + if (!gMap.gl) { + showGLWarningDialog(); + gMap.gl = null; + } + gTrackCanvas = document.getElementById("track"); + gTrackContext = gTrackCanvas.getContext("2d"); + if (!gMap.activeMap) + gMap.activeMap = "osm_mapnik"; + + //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 resizeAndDraw() { - var viewportWidth = window.innerWidth; - var viewportHeight = window.innerHeight; +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.getElementById("copyright").innerHTML = + gMapStyles[gMap.activeMap].copyright; + + gLoadingTile = new Image(); + gLoadingTile.src = "style/loading.png"; + gLoadingTile.onload = function() { + var throwEv = new CustomEvent("prefload-done"); + gAction.dispatchEvent(throwEv); + }; + } + } + else { + if (aEvent) + gAction.removeEventListener(aEvent.type, loadPrefs, false); + gAction.addEventListener("prefs-step", loadPrefs, false); + 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. + // Initial paint will do initial track drawing. + if (tracklen % redrawBase == 0) { + drawTrack(); + 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: {}, + glTextureKeys: {}, + + 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. + }, + + 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. + 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. + 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; + } + + 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"); + + 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, 0, "loading::0,0,0"); + + gMap.gl.uniform2f(gMap.glResolutionAttr, gGLMapCanvas.width, gGLMapCanvas.height); + + // Create a buffer for the position of the rectangle corners. + 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); + } + + var throwEv = new CustomEvent("mapinit-done"); + gAction.dispatchEvent(throwEv); + }, + + draw: function(aPixels, aOverdraw) { + gMap.assembleGL(aPixels); + drawTrack(); + }, + + assembleGL: function(aPixels) { + if (!gMap.gl) { return; } + // aPixels is an object with left/right/top/bottom members telling how many + // pixels on the borders should actually be drawn. + if (!aPixels) + aPixels = {left: gMap.gl.drawingBufferWidth, right: gMap.gl.drawingBufferWidth, + top: gMap.gl.drawingBufferHeight, bottom: gMap.gl.drawingBufferHeight}; + + document.getElementById("zoomLevel").textContent = gMap.pos.z; + gMap.zoomFactor = Math.pow(2, gMap.maxZoom - gMap.pos.z); + var wid = gMap.gl.drawingBufferWidth * gMap.zoomFactor; // Width in level 18 pixels. + var ht = gMap.gl.drawingBufferHeight * gMap.zoomFactor; // Height in level 18 pixels. + var size = gMap.tileSize * gMap.zoomFactor; // Tile size in level 18 pixels. + + var xMin = gMap.pos.x - wid / 2; // Corners of the window in level 18 pixels. + var yMin = gMap.pos.y - ht / 2; + var xMax = gMap.pos.x + wid / 2; + var yMax = gMap.pos.y + ht / 2; + + if (gMapPrefsLoaded && mainDB) + gPrefs.set("position", gMap.pos); + + var tiles = {left: Math.ceil((xMin + aPixels.left * gMap.zoomFactor) / size) - + (aPixels.left ? 0 : 1), + right: Math.floor((xMax - aPixels.right * gMap.zoomFactor) / size) - + (aPixels.right ? 1 : 0), + top: Math.ceil((yMin + aPixels.top * gMap.zoomFactor) / size) - + (aPixels.top ? 0 : 1), + bottom: Math.floor((yMax - aPixels.bottom * gMap.zoomFactor) / size) - + (aPixels.bottom ? 1 : 0)}; + + // Go through all the tiles in the map, find out if to draw them and 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++) { // slow script warnings on the tablet appear here! + // Only go to loading step if we need to fetch the image for this tile. + if (x < tiles.left || x > tiles.right || + y < tiles.top || y > tiles.bottom) { + // Initiate loading/drawing of the actual tile. + gTileService.get(gMap.activeMap, {x: x, y: y, z: gMap.pos.z}, + function(aImage, aStyle, aCoords, aTileKey) { + // Only load if this applies for the current view. + if ((aStyle == gMap.activeMap) && (aCoords.z == gMap.pos.z)) { + var txIndex = gMap.glTextureKeys[aTileKey]; + if (!txIndex) { + var URL = window.URL; + var imgURL = URL.createObjectURL(aImage); + var imgObj = new Image(); + imgObj.onload = function() { + var txNr = 1; + while (gMap.glTextures["tx" + txNr]) { txNr++; } + gMap.loadImageToTexture(imgObj, txNr, aTileKey); + requestAnimationFrame(function(aTimestamp) { gMap.drawGL() }); + URL.revokeObjectURL(imgURL); + } + imgObj.src = imgURL; + } + } + }); + } + } + } + requestAnimationFrame(function(aTimestamp) { gMap.drawGL() }); + }, + + drawGL: function() { + var wid = gMap.gl.drawingBufferWidth * gMap.zoomFactor; // Width in level 18 pixels. + var ht = gMap.gl.drawingBufferHeight * gMap.zoomFactor; // Height in level 18 pixels. + var size = gMap.tileSize * gMap.zoomFactor; // Tile size in level 18 pixels. - var canvasWidth = viewportWidth * 0.98; - var canvasHeight = (viewportHeight - 100) * 0.98; - gCanvas.style.position = "fixed"; - gCanvas.width = canvasWidth; - gCanvas.height = canvasHeight; - drawMap(); + var xMin = gMap.pos.x - wid / 2; // Corners of the window in level 18 pixels. + var yMin = gMap.pos.y - ht / 2; + var xMax = gMap.pos.x + wid / 2; + var yMax = gMap.pos.y + ht / 2; + + var txIndexList = []; + // Go through all the tiles in the map, find out if to draw them and 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++) { // 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) / gMap.zoomFactor); + var yoff = Math.round((y * size - yMin) / gMap.zoomFactor); + // Draw the tile, first find out the index of the texture to use. + var norm = normalizeCoords({x: x, y: y, z: gMap.pos.z}); + var tileKey = getTileKey(gMap.activeMap, norm); + var txIndex = gMap.glTextureKeys[tileKey]; + if (!txIndex) { txIndex = 0; } + txIndexList.push(txIndex); + gMap.drawTileGL(xoff, yoff, txIndex); + } + } + console.log("Used Indexes: " + txIndexList.join(",")); + }, + + 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); + } + gMap.draw(); + showUI(); + } + }, + + drawTileGL: function(aLeft, aRight, aTextureIndex) { + gMap.gl.activeTexture(gMap.gl.TEXTURE0); + gMap.gl.bindTexture(gMap.gl.TEXTURE_2D, gMap.glTextures["tx" + aTextureIndex]); + // 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, aTextureIndex, aTileKey) { + // TODO: Get rid of old textures. + gMap.glTextureKeys[aTileKey] = aTextureIndex; + // Create and bind texture. + gMap.glTextures["tx" + aTextureIndex] = gMap.gl.createTexture(); + gMap.gl.bindTexture(gMap.gl.TEXTURE_2D, gMap.glTextures["tx" + aTextureIndex]); + // 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); + }, } +// 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 (gPos.z < gMaxZoom) { - gPos.z++; - drawMap(); + if (gMap.pos.z < gMap.maxZoom) { + gMap.pos.z++; + gMap.draw(); } } function zoomOut() { - if (gPos.z > 0) { - gPos.z--; - drawMap(); + 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 && gActiveMap != mapSel.value) { - gActiveMap = mapSel.value; - gTiles = {}; - drawMap(); + if (mapSel.selectedIndex >= 0 && gMap.activeMap != mapSel.value) { + gMap.activeMap = mapSel.value; + document.getElementById("copyright").innerHTML = + gMapStyles[gMap.activeMap].copyright; + showUI(); + gMap.draw(); } } @@ -135,166 +524,618 @@ function mod(a, b) { return ((a % b) + b) % b; } -function normaliseIndices(x, y, z) { - return {x: mod(x, Math.pow(2, z)), - y: mod(y, Math.pow(2, z)), - z: 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}; } -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 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 x = pos[0]; - var y = pos[1]; - var z = pos[2]; - var wid = gCanvas.width * Math.pow(2, gMaxZoom - z); - var ht = gCanvas.height * Math.pow(2, gMaxZoom - z); + var zoomFactor = Math.pow(2, gMap.maxZoom - pos.z); + var wid = gMap.width * zoomFactor; + var ht = gMap.height * zoomFactor; - x *= Math.pow(2, gMaxZoom - z); - y *= Math.pow(2, gMaxZoom - z); + pos.x *= zoomFactor; + pos.y *= zoomFactor; - var sz = gTileSize * Math.pow(2, gMaxZoom - z); - if (x > gPos.x + wid / 2 || y > gPos.y + ht / 2 || - x + sz < gPos.x - wid / 2 || y - sz < gPos.y - ht / 2) + 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 = 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() { - // Go through all the currently loaded tiles. If we don't want any of them remove them. - // for (t in gTiles) { - // if (isOutsideWindow(t)) - // delete gTiles[t]; - // } - var z = Math.round(gPos.z); - var wid = gCanvas.width * Math.pow(2, gMaxZoom - z); // Width in level 18 pixels. - var ht = gCanvas.height * Math.pow(2, gMaxZoom - z); // Height in level 18 pixels. - var size = gTileSize * Math.pow(2, gMaxZoom - z); // Tile size in level 18 pixels. - - var xMin = gPos.x - wid / 2; // Corners of the window in level 18 pixels. - var yMin = gPos.y - ht / 2; - var xMax = gPos.x + wid / 2; - var yMax = gPos.y + ht / 2; - - // 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) / Math.pow(2, gMaxZoom - z); - var yoff = (y * size - yMin) / Math.pow(2, gMaxZoom - z); - var tileKey = encodeIndex(x, y, z); - if (gTiles[tileKey] && gTiles[tileKey].complete) { - // Round here is **CRUICIAL** 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(); - } - } - gContext.fillStyle = "#ffffff"; - gContext.fillRect(Math.round(xoff), Math.round(yoff), gTileSize, gTileSize); - } +function drawTrack() { + 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)); } } } +function drawTrackPoint(aLatitude, aLongitude, lastPoint) { + var trackpoint = gps2xy(aLatitude, aLongitude); + // lastPoint is for optimizing (not actually executing the draw until the last) + trackpoint.optimized = (lastPoint === false); + var 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 || !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 { + if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) { + gTrackContext.beginPath(); + gTrackContext.moveTo(Math.round((gLastDrawnPoint.x - gMap.pos.x) / gMap.zoomFactor + gMap.width / 2), + Math.round((gLastDrawnPoint.y - gMap.pos.y) / gMap.zoomFactor + gMap.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 - 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; + } +} + var mapEvHandler = { handleEvent: function(aEvent) { var touchEvent = aEvent.type.indexOf('touch') != -1; - // Bail out on unwanted map moves, but not mousewheel events. - if (aEvent.type != "DOMMouseScroll" && aEvent.type != "mousewheel") { + 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 && zoomstart && - !aEvent.changedTouches.identifiedTouch(gZoomTouchID)) + if (touchEvent && gDragging && + !aEvent.changedTouches.identifiedTouch(gDragTouchID)) return; } var coordObj = touchEvent ? - aEvent.changedTouches.identifiedTouch(gZoomTouchID) : + aEvent.changedTouches.identifiedTouch(gDragTouchID) : aEvent; switch (aEvent.type) { case "mousedown": case "touchstart": if (touchEvent) { - zoomTouchID = aEvent.changedTouches.item(0).identifier; - coordObj = aEvent.changedTouches.identifiedTouch(gZoomTouchID); + 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) + ); + } + 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 - 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": - var x = coordObj.clientX - gCanvas.offsetLeft; - var y = coordObj.clientY - gCanvas.offsetTop; + 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; - gPos.x -= dX * Math.pow(2, gMaxZoom - gPos.z); - gPos.y -= dY * Math.pow(2, gMaxZoom - gPos.z); - drawMap(); + gMap.pos.x -= dX * gMap.zoomFactor; + gMap.pos.y -= dY * gMap.zoomFactor; + if (false) { // use optimized path + /* TODO: investigate optimized path for GL - code below was 2D. + var mapData = gMapContext.getImageData(0, 0, + gMapCanvas.width, + gMapCanvas.height); + gMapContext.clearRect(0, 0, gMapCanvas.width, gMapCanvas.height); + gMapContext.putImageData(mapData, dX, dY); + gMap.draw({left: (dX > 0) ? dX : 0, + right: (dX < 0) ? -dX : 0, + top: (dY > 0) ? dY : 0, + bottom: (dY < 0) ? -dY : 0}); + */ + } + else { + gMap.draw(false, true); + } + 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 "DOMMouseScroll": - case "mousewheel": - var delta = 0; - if (aEvent.wheelDelta) { - delta = aEvent.wheelDelta / 120; - if (window.opera) - delta = -delta; + 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(); } - else if (aEvent.detail) { - delta = -aEvent.detail / 3; + 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; } - if (delta > 0) - zoomIn(); - else if (delta < 0) - zoomOut(); + // Move if needed. + if (dX || dY) { + gMap.pos.x -= dX * gMap.zoomFactor; + gMap.pos.y -= dY * gMap.zoomFactor; + if (false) { // use optimized path + /* TODO: investigate optimized path for GL - code below was 2D. + var mapData = gMapContext.getImageData(0, 0, + gMapCanvas.width, + gMapCanvas.height); + gMapContext.clearRect(0, 0, gMapCanvas.width, gMapCanvas.height); + gMapContext.putImageData(mapData, dX, dY); + gMap.draw({left: (dX > 0) ? dX : 0, + right: (dX < 0) ? -dX : 0, + top: (dY > 0) ? dY : 0, + bottom: (dY < 0) ? -dY : 0}); + */ + } + else { + gMap.draw(false, true); + } + } break; } } }; + +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"; + 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 (gGeoWatchID) { + gGeolocation.clearWatch(gGeoWatchID); + } +} + +function clearTrack() { + gTrack = []; + gTrackStore.clear(); + 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() * 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; + 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; + if (aCallback) + aCallback(success, event); + }; + request.onerror = function(event) { + // Errors can be handled here. + if (aCallback) + aCallback(success, event); + } + } +};