| 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this file, |
| 3 | * You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| 4 | |
| 5 | var gGLMapCanvas, gTrackCanvas, gTrackContext, gGeolocation; |
| 6 | var gDebug = false; |
| 7 | |
| 8 | var gMinTrackAccuracy = 1000; // meters |
| 9 | var gTrackWidth = 2; // pixels |
| 10 | var gTrackColor = "#FF0000"; |
| 11 | var gCurLocSize = 6; // pixels |
| 12 | var gCurLocColor = "#A00000"; |
| 13 | |
| 14 | var gMapStyles = { |
| 15 | // OSM tile usage policy: http://wiki.openstreetmap.org/wiki/Tile_usage_policy |
| 16 | // Find some more OSM ones at http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Tile_servers |
| 17 | // and http://wiki.openstreetmap.org/wiki/Tiles or http://wiki.openstreetmap.org/wiki/TMS |
| 18 | osm_mapnik: |
| 19 | {name: "OpenStreetMap (Mapnik)", |
| 20 | url: "https://[a-c].tile.openstreetmap.org/{z}/{x}/{y}.png", |
| 21 | 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>'}, |
| 22 | osm_cyclemap: |
| 23 | {name: "Cycle Map (OSM)", |
| 24 | url: "https://[a-c].tile.thunderforest.com/cycle/{z}/{x}/{y}.png", // "http://[a-c].tile.opencyclemap.org/cycle/{z}/{x}/{y}.png", |
| 25 | 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>'}, |
| 26 | osm_transmap: |
| 27 | {name: "Transport Map (OSM)", |
| 28 | url: "https://[a-c].tile.thunderforest.com/transport/{z}/{x}/{y}.png", // "http://[a-c].tile2.opencyclemap.org/transport/{z}/{x}/{y}.png", |
| 29 | 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>'}, |
| 30 | osm_germany: |
| 31 | {name: "OSM German Style", |
| 32 | url: "https://tilecache[1-4].kairo.at/osmde/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at |
| 33 | //url: "http://[a-d].tile.openstreetmap.de/tiles/osmde/{z}/{x}/{y}.png", // https is not supported at all |
| 34 | 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>'}, |
| 35 | oepnvkarte: |
| 36 | {name: "ÖPNV-Karte (OSM)", |
| 37 | url: "https://tilecache[1-4].kairo.at/oepnv/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at |
| 38 | //url: "http://tileserver.memomaps.de/tilegen/{z}/{x}/{y}.png", // memomaps.de does not support CORS or https at this time :( |
| 39 | copyright: 'Map data © <a href="http://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="http://www.openstreetmap.org/copyright">ODbL/CC-BY-SA</a>, tiles by <a href="http://memomaps.de">MeMoMaps</a> under <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>.'}, |
| 40 | mapquest_open: |
| 41 | {name: "MapQuest OSM", |
| 42 | url: "https://tilecache[1-4].kairo.at/mapqosm/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at |
| 43 | //url: "http://otile[1-4].mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.png", // https has wrong cert, akamai instead of mqcdn |
| 44 | 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>.'}, |
| 45 | mapquest_aerial: |
| 46 | {name: "MapQuest Open Aerial", |
| 47 | url: "https://tilecache[1-4].kairo.at/mapqsat/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at |
| 48 | //url: "http://otile[1-4].mqcdn.com/tiles/1.0.0/sat/{z}/{x}/{y}.jpg", |
| 49 | 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.'}, |
| 50 | osm_hot: |
| 51 | {name: "OSM HOT style", |
| 52 | url: "https://tilecache[1-4].kairo.at/osmhot/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at |
| 53 | //url: "http://[a-c].tile.openstreetmap.fr/hot/{z}/{x}/{y}.png", // https has CAcert which doesn't work in browsers |
| 54 | 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>'}, |
| 55 | hikebike: |
| 56 | {name: "Hike and Bike (OSM)", |
| 57 | url: "https://tilecache[1-4].kairo.at/hikebike/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at |
| 58 | //url: "http://toolserver.org/tiles/hikebike/{z}/{x}/{y}.png", // toolserver.org does not support CORS at this time :( |
| 59 | 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>'}, |
| 60 | outdoors: |
| 61 | {name: "Outdoors (OSM)", |
| 62 | url: "https://[a-c].tile.thunderforest.com/outdoors/{z}/{x}/{y}.png", // url: "http://[a-c].tile.opencyclemap.org/outdoors/{z}/{x}/{y}.png", |
| 63 | 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 by <a href="http://www.thunderforest.com/">Thunderforest</a>.'}, |
| 64 | stamen_toner: |
| 65 | {name: "Stamen Toner (B+W)", |
| 66 | url: "https://tilecache[1-4].kairo.at/toner/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at |
| 67 | //url: "http://[a-c].tile.stamen.com/toner/{z}/{x}/{y}.jpg", // https has wrong cert, .ssl.fastly.net instead of .tile.stamen.com |
| 68 | copyright: 'Map data © <a href="http://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="http://www.openstreetmap.org/copyright">ODbL/CC-BY-SA</a>, tiles by <a href="http://stamen.com">Stamen Design</a>, under <a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>.'}, |
| 69 | stamen_terrain: |
| 70 | {name: "Stamen Terrain (USA only)", |
| 71 | url: "https://tilecache[1-4].kairo.at/terrain/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at |
| 72 | //url: "http://[a-c].tile.stamen.com/terrain/{z}/{x}/{y}.jpg", // https has wrong cert, .ssl.fastly.net instead of .tile.stamen.com |
| 73 | copyright: 'Map data © <a href="http://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="http://www.openstreetmap.org/copyright">ODbL/CC-BY-SA</a>, tiles by <a href="http://stamen.com">Stamen Design</a>, under <a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>.'}, |
| 74 | stamen_watercolor: |
| 75 | {name: "Stamen Watercolor (artistic)", |
| 76 | url: "https://tilecache[1-4].kairo.at/watercolor/{z}/{x}/{y}.png", // route through CORS+SSL tilecache @ kairo.at |
| 77 | //url: "http://[a-c].tile.stamen.com/watercolor/{z}/{x}/{y}.jpg", // https has wrong cert, .ssl.fastly.net instead of .tile.stamen.com |
| 78 | copyright: 'Map data © <a href="http://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="http://www.openstreetmap.org/copyright">ODbL/CC-BY-SA</a>, tiles by <a href="http://stamen.com">Stamen Design</a>, under <a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>.'}, |
| 79 | }; |
| 80 | |
| 81 | var gLastMouseX = 0; |
| 82 | var gLastMouseY = 0; |
| 83 | |
| 84 | var gLoadingTile; |
| 85 | |
| 86 | var gMapPrefsLoaded = false; |
| 87 | |
| 88 | var gDragging = false; |
| 89 | var gDragTouchID, gPinchStartWidth; |
| 90 | |
| 91 | var gGeoWatchID, gGPSWakeLock; |
| 92 | var gTrack = []; |
| 93 | var gLastTrackPoint, gLastDrawnPoint; |
| 94 | var gDrawing = false; |
| 95 | var gCenterPosition = true; |
| 96 | |
| 97 | var gCurPosMapCache; |
| 98 | |
| 99 | function initMap() { |
| 100 | gGeolocation = navigator.geolocation; |
| 101 | // Set up canvas context. |
| 102 | gGLMapCanvas = document.getElementById("map"); |
| 103 | try { |
| 104 | // Try to grab the standard context. If it fails, fallback to experimental. |
| 105 | // We also try to tell it we do not need a depth buffer. |
| 106 | gMap.gl = gGLMapCanvas.getContext("webgl", {depth: false}) || |
| 107 | gGLMapCanvas.getContext("experimental-webgl", {depth: false}); |
| 108 | } |
| 109 | catch(e) {} |
| 110 | if (!gMap.gl) { |
| 111 | // If we don't have a GL context, give up now |
| 112 | showGLWarningDialog(); |
| 113 | gMap.gl = null; |
| 114 | } |
| 115 | else { |
| 116 | // GL context can be lost at any time, handle that. |
| 117 | // See http://www.khronos.org/webgl/wiki/HandlingContextLost |
| 118 | gGLMapCanvas.addEventListener("webglcontextlost", |
| 119 | gMap.handleContextLost, false); |
| 120 | gGLMapCanvas.addEventListener("webglcontextrestored", |
| 121 | gMap.handleContextRestored, false); |
| 122 | } |
| 123 | gTrackCanvas = document.getElementById("track"); |
| 124 | gTrackContext = gTrackCanvas.getContext("2d"); |
| 125 | |
| 126 | //gDebug = true; |
| 127 | if (gDebug) { |
| 128 | gGeolocation = geofake; |
| 129 | var hiddenList = document.getElementsByClassName("debugHide"); |
| 130 | // last to first - list of elements with that class is changing! |
| 131 | for (var i = hiddenList.length - 1; i >= 0; i--) { |
| 132 | hiddenList[i].classList.remove("debugHide"); |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | gAction.addEventListener("prefload-done", gMap.initGL, false); |
| 137 | |
| 138 | console.log("map vars set, loading prefs..."); |
| 139 | loadPrefs(); |
| 140 | } |
| 141 | |
| 142 | function loadPrefs(aEvent) { |
| 143 | if (aEvent && aEvent.type == "prefs-step") { |
| 144 | console.log("wait: " + gWaitCounter); |
| 145 | if (gWaitCounter == 0) { |
| 146 | gAction.removeEventListener(aEvent.type, loadPrefs, false); |
| 147 | gMapPrefsLoaded = true; |
| 148 | console.log("prefs loaded."); |
| 149 | |
| 150 | gTrackCanvas.addEventListener("mouseup", mapEvHandler, false); |
| 151 | gTrackCanvas.addEventListener("mousemove", mapEvHandler, false); |
| 152 | gTrackCanvas.addEventListener("mousedown", mapEvHandler, false); |
| 153 | gTrackCanvas.addEventListener("mouseout", mapEvHandler, false); |
| 154 | |
| 155 | gTrackCanvas.addEventListener("touchstart", mapEvHandler, false); |
| 156 | gTrackCanvas.addEventListener("touchmove", mapEvHandler, false); |
| 157 | gTrackCanvas.addEventListener("touchend", mapEvHandler, false); |
| 158 | gTrackCanvas.addEventListener("touchcancel", mapEvHandler, false); |
| 159 | gTrackCanvas.addEventListener("touchleave", mapEvHandler, false); |
| 160 | |
| 161 | gTrackCanvas.addEventListener("wheel", mapEvHandler, false); |
| 162 | |
| 163 | document.getElementById("body").addEventListener("keydown", mapEvHandler, false); |
| 164 | |
| 165 | document.addEventListener("visibilitychange", visibilityEvHandler, false); |
| 166 | |
| 167 | console.log("Events added."); |
| 168 | |
| 169 | console.log("Init loading tile..."); |
| 170 | gLoadingTile = new Image(); |
| 171 | gLoadingTile.onload = function() { |
| 172 | console.log("Loading tile loaded."); |
| 173 | var throwEv = new CustomEvent("prefload-done"); |
| 174 | gAction.dispatchEvent(throwEv); |
| 175 | }; |
| 176 | console.log("Set loading tile..."); |
| 177 | gLoadingTile.src = "style/loading.png"; |
| 178 | } |
| 179 | } |
| 180 | else { |
| 181 | if (aEvent) |
| 182 | gAction.removeEventListener(aEvent.type, loadPrefs, false); |
| 183 | gAction.addEventListener("prefs-step", loadPrefs, false); |
| 184 | gWaitCounter++; |
| 185 | gPrefs.get("active_map_style", function(aValue) { |
| 186 | if (aValue && gMapStyles[aValue]) { |
| 187 | gMap.activeMap = aValue; |
| 188 | } |
| 189 | else { |
| 190 | gMap.activeMap = "osm_mapnik"; |
| 191 | } |
| 192 | document.getElementById("mapSelector").value = gMap.activeMap; |
| 193 | document.getElementById("copyright").innerHTML = |
| 194 | gMapStyles[gMap.activeMap].copyright; |
| 195 | gWaitCounter--; |
| 196 | var throwEv = new CustomEvent("prefs-step"); |
| 197 | gAction.dispatchEvent(throwEv); |
| 198 | }); |
| 199 | gWaitCounter++; |
| 200 | gPrefs.get("position", function(aValue) { |
| 201 | if (aValue && aValue.x && aValue.y && aValue.z) { |
| 202 | gMap.pos = aValue; |
| 203 | } |
| 204 | gWaitCounter--; |
| 205 | var throwEv = new CustomEvent("prefs-step"); |
| 206 | gAction.dispatchEvent(throwEv); |
| 207 | }); |
| 208 | gWaitCounter++; |
| 209 | gPrefs.get("center_map", function(aValue) { |
| 210 | if (aValue === undefined) { |
| 211 | document.getElementById("centerCheckbox").checked = true; |
| 212 | } |
| 213 | else { |
| 214 | document.getElementById("centerCheckbox").checked = aValue; |
| 215 | } |
| 216 | setCentering(document.getElementById("centerCheckbox")); |
| 217 | gWaitCounter--; |
| 218 | var throwEv = new CustomEvent("prefs-step"); |
| 219 | gAction.dispatchEvent(throwEv); |
| 220 | }); |
| 221 | gWaitCounter++; |
| 222 | gPrefs.get("tracking_enabled", function(aValue) { |
| 223 | if (aValue === undefined) { |
| 224 | document.getElementById("trackCheckbox").checked = true; |
| 225 | } |
| 226 | else { |
| 227 | document.getElementById("trackCheckbox").checked = aValue; |
| 228 | } |
| 229 | gWaitCounter--; |
| 230 | var throwEv = new CustomEvent("prefs-step"); |
| 231 | gAction.dispatchEvent(throwEv); |
| 232 | }); |
| 233 | gWaitCounter++; |
| 234 | var trackLoadStarted = false; |
| 235 | var redrawBase = 100; |
| 236 | gTrackStore.getListStepped(function(aTPoint) { |
| 237 | if (aTPoint) { |
| 238 | // Add in front and return new length. |
| 239 | var tracklen = gTrack.unshift(aTPoint); |
| 240 | // Redraw track periodically, larger distance the longer it gets |
| 241 | // (but clamped to the first value over a certain limit). |
| 242 | // Initial paint will do initial track drawing. |
| 243 | if (tracklen % redrawBase == 0) { |
| 244 | drawTrack(); |
| 245 | if (redrawBase < 1000) { |
| 246 | redrawBase = tracklen; |
| 247 | } |
| 248 | } |
| 249 | } |
| 250 | else { |
| 251 | // Last point received. |
| 252 | drawTrack(); |
| 253 | } |
| 254 | if (!trackLoadStarted) { |
| 255 | // We have the most recent point, if present, rest will load async. |
| 256 | trackLoadStarted = true; |
| 257 | gWaitCounter--; |
| 258 | var throwEv = new CustomEvent("prefs-step"); |
| 259 | gAction.dispatchEvent(throwEv); |
| 260 | } |
| 261 | }); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | var gMap = { |
| 266 | gl: null, |
| 267 | glShaderProgram: null, |
| 268 | glVertexPositionAttr: null, |
| 269 | glTextureCoordAttr: null, |
| 270 | glResolutionAttr: null, |
| 271 | glMapTexture: null, |
| 272 | glTextures: {}, |
| 273 | glTxCleanIntervalID: null, |
| 274 | glTexturesPerZoomLevel: 0, |
| 275 | |
| 276 | activeMap: "osm_mapnik", |
| 277 | tileSize: 256, |
| 278 | maxZoom: 18, // The minimum is 0. |
| 279 | zoomFactor: null, |
| 280 | pos: { |
| 281 | x: 35630000.0, // Current position in the map in pixels at the maximum zoom level (18) |
| 282 | y: 23670000.0, // The range is 0-67108864 (2^gMap.maxZoom * gMap.tileSize) |
| 283 | z: 5 // This could be fractional if supported being between zoom levels. |
| 284 | }, |
| 285 | baseDim: { // Map width, height and tile size in level 18 pixels. |
| 286 | wid: null, |
| 287 | ht: null, |
| 288 | tsize: null, |
| 289 | }, |
| 290 | |
| 291 | get width() { return gMap.gl ? gMap.gl.drawingBufferWidth : gGLMapCanvas.width; }, |
| 292 | get height() { return gMap.gl ? gMap.gl.drawingBufferHeight : gGLMapCanvas.height; }, |
| 293 | |
| 294 | getVertShaderSource: function() { |
| 295 | return 'attribute vec2 aVertexPosition;\n' + |
| 296 | 'attribute vec2 aTextureCoord;\n\n' + |
| 297 | 'uniform vec2 uResolution;\n\n' + |
| 298 | 'varying highp vec2 vTextureCoord;\n\n' + |
| 299 | 'void main(void) {\n' + |
| 300 | // convert the rectangle from pixels to -1.0 to +1.0 (clipspace) 0.0 to 1.0 |
| 301 | ' vec2 clipSpace = aVertexPosition * 2.0 / uResolution - 1.0;\n' + |
| 302 | ' gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);\n' + |
| 303 | ' vTextureCoord = aTextureCoord;\n' + |
| 304 | '}'; }, |
| 305 | getFragShaderSource: function() { |
| 306 | return 'varying highp vec2 vTextureCoord;\n\n' + |
| 307 | 'uniform sampler2D uImage;\n\n' + |
| 308 | 'void main(void) {\n' + |
| 309 | ' gl_FragColor = texture2D(uImage, vTextureCoord);\n' + |
| 310 | '}'; }, |
| 311 | |
| 312 | initGL: function() { |
| 313 | // When called from the event listener, the "this" reference doesn't work, so use the object name. |
| 314 | console.log("Initializing WebGL..."); |
| 315 | if (gMap.gl) { |
| 316 | gMap.gl.viewport(0, 0, gMap.gl.drawingBufferWidth, gMap.gl.drawingBufferHeight); |
| 317 | gMap.gl.clearColor(0.0, 0.0, 0.0, 0.5); // Set clear color to black, fully opaque. |
| 318 | gMap.gl.clear(gMap.gl.COLOR_BUFFER_BIT|gMap.gl.DEPTH_BUFFER_BIT); // Clear the color. |
| 319 | |
| 320 | // Create and initialize the shaders. |
| 321 | console.log("Create and compile shaders..."); |
| 322 | var vertShader = gMap.gl.createShader(gMap.gl.VERTEX_SHADER); |
| 323 | var fragShader = gMap.gl.createShader(gMap.gl.FRAGMENT_SHADER); |
| 324 | gMap.gl.shaderSource(vertShader, gMap.getVertShaderSource()); |
| 325 | // Compile the shader program. |
| 326 | gMap.gl.compileShader(vertShader); |
| 327 | // See if it compiled successfully. |
| 328 | if (!gMap.gl.getShaderParameter(vertShader, gMap.gl.COMPILE_STATUS)) { |
| 329 | console.log("An error occurred compiling the vertex shader: " + gMap.gl.getShaderInfoLog(vertShader)); |
| 330 | return null; |
| 331 | } |
| 332 | gMap.gl.shaderSource(fragShader, gMap.getFragShaderSource()); |
| 333 | // Compile the shader program. |
| 334 | gMap.gl.compileShader(fragShader); |
| 335 | // See if it compiled successfully. |
| 336 | if (!gMap.gl.getShaderParameter(fragShader, gMap.gl.COMPILE_STATUS)) { |
| 337 | console.log("An error occurred compiling the fragment shader: " + gMap.gl.getShaderInfoLog(fragShader)); |
| 338 | return null; |
| 339 | } |
| 340 | |
| 341 | console.log("Create and link shader program..."); |
| 342 | gMap.glShaderProgram = gMap.gl.createProgram(); |
| 343 | gMap.gl.attachShader(gMap.glShaderProgram, vertShader); |
| 344 | gMap.gl.attachShader(gMap.glShaderProgram, fragShader); |
| 345 | gMap.gl.linkProgram(gMap.glShaderProgram); |
| 346 | // If creating the shader program failed, alert |
| 347 | if (!gMap.gl.getProgramParameter(gMap.glShaderProgram, gMap.gl.LINK_STATUS)) { |
| 348 | alert("Unable to initialize the shader program."); |
| 349 | } |
| 350 | gMap.gl.useProgram(gMap.glShaderProgram); |
| 351 | // Get locations of the attributes. |
| 352 | gMap.glVertexPositionAttr = gMap.gl.getAttribLocation(gMap.glShaderProgram, "aVertexPosition"); |
| 353 | gMap.glTextureCoordAttr = gMap.gl.getAttribLocation(gMap.glShaderProgram, "aTextureCoord"); |
| 354 | gMap.glResolutionAttr = gMap.gl.getUniformLocation(gMap.glShaderProgram, "uResolution"); |
| 355 | |
| 356 | console.log("Set up vertex buffer..."); |
| 357 | var tileVerticesBuffer = gMap.gl.createBuffer(); |
| 358 | gMap.gl.bindBuffer(gMap.gl.ARRAY_BUFFER, tileVerticesBuffer); |
| 359 | // The vertices are the coordinates of the corner points of the square. |
| 360 | var vertices = [ |
| 361 | 0.0, 0.0, |
| 362 | 1.0, 0.0, |
| 363 | 0.0, 1.0, |
| 364 | 0.0, 1.0, |
| 365 | 1.0, 0.0, |
| 366 | 1.0, 1.0, |
| 367 | ]; |
| 368 | gMap.gl.bufferData(gMap.gl.ARRAY_BUFFER, new Float32Array(vertices), gMap.gl.STATIC_DRAW); |
| 369 | gMap.gl.enableVertexAttribArray(gMap.glTextureCoordAttr); |
| 370 | gMap.gl.vertexAttribPointer(gMap.glTextureCoordAttr, 2, gMap.gl.FLOAT, false, 0, 0); |
| 371 | |
| 372 | gMap.loadImageToTexture(gLoadingTile, getTileKey("loading", {x: 0, y: 0, z: 0})); |
| 373 | |
| 374 | gMap.gl.uniform2f(gMap.glResolutionAttr, gGLMapCanvas.width, gGLMapCanvas.height); |
| 375 | |
| 376 | // Create a buffer for the position of the rectangle corners. |
| 377 | console.log("Set up coord buffer..."); |
| 378 | var mapVerticesTextureCoordBuffer = gMap.gl.createBuffer(); |
| 379 | gMap.gl.bindBuffer(gMap.gl.ARRAY_BUFFER, mapVerticesTextureCoordBuffer); |
| 380 | gMap.gl.enableVertexAttribArray(gMap.glVertexPositionAttr); |
| 381 | gMap.gl.vertexAttribPointer(gMap.glVertexPositionAttr, 2, gMap.gl.FLOAT, false, 0, 0); |
| 382 | |
| 383 | // Call texture cleaning every 30 seconds, for now (is 60 better?). |
| 384 | gMap.glTxCleanIntervalID = window.setInterval(gMap.cleanTextures, 30 * 1000); |
| 385 | } |
| 386 | |
| 387 | if (!gAppInitDone) { |
| 388 | // We may be called when context was lost and destroyed, |
| 389 | // only send event when we are in app startup |
| 390 | // (gAppInitDone is set to true right after we return this event). |
| 391 | var throwEv = new CustomEvent("mapinit-done"); |
| 392 | gAction.dispatchEvent(throwEv); |
| 393 | } |
| 394 | }, |
| 395 | |
| 396 | draw: function() { |
| 397 | gMap.assembleGL(); |
| 398 | drawTrack(); |
| 399 | }, |
| 400 | |
| 401 | assembleGL: function() { |
| 402 | if (!gMap.gl) { return; } |
| 403 | |
| 404 | document.getElementById("zoomLevel").textContent = gMap.pos.z; |
| 405 | gMap.zoomFactor = Math.pow(2, gMap.maxZoom - gMap.pos.z); |
| 406 | gMap.baseDim.wid = gMap.gl.drawingBufferWidth * gMap.zoomFactor; |
| 407 | gMap.baseDim.ht = gMap.gl.drawingBufferHeight * gMap.zoomFactor; |
| 408 | gMap.baseDim.tsize = gMap.tileSize * gMap.zoomFactor; |
| 409 | |
| 410 | var xMin = gMap.pos.x - gMap.baseDim.wid / 2; // Corners of the window in level 18 pixels. |
| 411 | var yMin = gMap.pos.y - gMap.baseDim.ht / 2; |
| 412 | var xMax = gMap.pos.x + gMap.baseDim.wid / 2; |
| 413 | var yMax = gMap.pos.y + gMap.baseDim.ht / 2; |
| 414 | |
| 415 | if (gMapPrefsLoaded && mainDB) |
| 416 | gPrefs.set("position", gMap.pos); |
| 417 | |
| 418 | // Go through all the tiles in the map, find out if to draw them and do so. |
| 419 | for (var x = Math.floor(xMin / gMap.baseDim.tsize); x < Math.ceil(xMax / gMap.baseDim.tsize); x++) { |
| 420 | for (var y = Math.floor(yMin / gMap.baseDim.tsize); y < Math.ceil(yMax / gMap.baseDim.tsize); y++) { |
| 421 | // Only go to loading step if we haven't loaded the texture. |
| 422 | var coords = {x: x, y: y, z: gMap.pos.z}; |
| 423 | var tileKey = getTileKey(gMap.activeMap, normalizeCoords(coords)); |
| 424 | if (!gMap.glTextures[tileKey]) { |
| 425 | // Initiate loading/drawing of the actual tile. |
| 426 | gTileService.get(gMap.activeMap, coords, |
| 427 | function(aImage, aStyle, aCoords, aTileKey) { |
| 428 | // Only actually load if this still applies for the current view. |
| 429 | if ((aStyle == gMap.activeMap) && (aCoords.z == gMap.pos.z)) { |
| 430 | var URL = window.URL; |
| 431 | var imgURL = URL.createObjectURL(aImage); |
| 432 | var imgObj = new Image(); |
| 433 | imgObj.onload = function() { |
| 434 | gMap.loadImageToTexture(imgObj, aTileKey); |
| 435 | if (document.hidden != true) { // Only draw if we're actually visible. |
| 436 | window.requestAnimationFrame(function(aTimestamp) { gMap.drawGL() }); |
| 437 | } |
| 438 | URL.revokeObjectURL(imgURL); |
| 439 | } |
| 440 | imgObj.src = imgURL; |
| 441 | } |
| 442 | }); |
| 443 | } |
| 444 | } |
| 445 | } |
| 446 | if (document.hidden != true) { // Only draw if we're actually visible. |
| 447 | window.requestAnimationFrame(function(aTimestamp) { gMap.drawGL() }); |
| 448 | } |
| 449 | }, |
| 450 | |
| 451 | drawGL: function() { |
| 452 | var xMin = gMap.pos.x - gMap.baseDim.wid / 2; // Corners of the window in level 18 pixels. |
| 453 | var yMin = gMap.pos.y - gMap.baseDim.ht / 2; |
| 454 | var xMax = gMap.pos.x + gMap.baseDim.wid / 2; |
| 455 | var yMax = gMap.pos.y + gMap.baseDim.ht / 2; |
| 456 | |
| 457 | // Go through all the tiles in the map, find out if to draw them and do so. |
| 458 | for (var x = Math.floor(xMin / gMap.baseDim.tsize); x < Math.ceil(xMax / gMap.baseDim.tsize); x++) { |
| 459 | for (var y = Math.floor(yMin / gMap.baseDim.tsize); y < Math.ceil(yMax / gMap.baseDim.tsize); y++) { |
| 460 | // Rounding the pixel offsets ensures we position the tiles precisely. |
| 461 | var xoff = Math.round((x * gMap.baseDim.tsize - xMin) / gMap.zoomFactor); |
| 462 | var yoff = Math.round((y * gMap.baseDim.tsize - yMin) / gMap.zoomFactor); |
| 463 | // Draw the tile, first find out the actual texture to use. |
| 464 | var norm = normalizeCoords({x: x, y: y, z: gMap.pos.z}); |
| 465 | var tileKey = getTileKey(gMap.activeMap, norm); |
| 466 | if (!gMap.glTextures[tileKey]) { |
| 467 | tileKey = getTileKey("loading", {x: 0, y: 0, z: 0}); |
| 468 | } |
| 469 | gMap.drawTileGL(xoff, yoff, tileKey); |
| 470 | } |
| 471 | } |
| 472 | }, |
| 473 | |
| 474 | resizeAndDraw: function() { |
| 475 | var viewportWidth = Math.min(window.innerWidth, window.outerWidth); |
| 476 | var viewportHeight = Math.min(window.innerHeight, window.outerHeight); |
| 477 | if (gGLMapCanvas && gTrackCanvas) { |
| 478 | gGLMapCanvas.width = viewportWidth; |
| 479 | gGLMapCanvas.height = viewportHeight; |
| 480 | gTrackCanvas.width = viewportWidth; |
| 481 | gTrackCanvas.height = viewportHeight; |
| 482 | if (gMap.gl) { |
| 483 | // Size viewport to canvas size. |
| 484 | gMap.gl.viewport(0, 0, gMap.gl.drawingBufferWidth, gMap.gl.drawingBufferHeight); |
| 485 | // Clear the color. |
| 486 | gMap.gl.clear(gMap.gl.COLOR_BUFFER_BIT); |
| 487 | // Make sure the vertex shader get the right resolution. |
| 488 | gMap.gl.uniform2f(gMap.glResolutionAttr, gGLMapCanvas.width, gGLMapCanvas.height); |
| 489 | // Prepare recalculation of textures to keep for one zoom level. |
| 490 | gMap.glTexturesPerZoomLevel = 0; |
| 491 | } |
| 492 | gMap.draw(); |
| 493 | showUI(); |
| 494 | } |
| 495 | }, |
| 496 | |
| 497 | drawTileGL: function(aLeft, aRight, aTileKey) { |
| 498 | gMap.gl.activeTexture(gMap.gl.TEXTURE0); |
| 499 | gMap.gl.bindTexture(gMap.gl.TEXTURE_2D, gMap.glTextures[aTileKey]); |
| 500 | // Set uImage to refer to TEXTURE0 |
| 501 | gMap.gl.uniform1i(gMap.gl.getUniformLocation(gMap.glShaderProgram, "uImage"), 0); |
| 502 | var x_start = aLeft; |
| 503 | var i_width = gMap.tileSize; |
| 504 | var y_start = aRight; |
| 505 | var i_height = gMap.tileSize; |
| 506 | var textureCoordinates = [ |
| 507 | x_start, y_start, |
| 508 | x_start + i_width, y_start, |
| 509 | x_start, y_start + i_height, |
| 510 | x_start, y_start + i_height, |
| 511 | x_start + i_width, y_start, |
| 512 | x_start + i_width, y_start + i_height, |
| 513 | ]; |
| 514 | gMap.gl.bufferData(gMap.gl.ARRAY_BUFFER, new Float32Array(textureCoordinates), gMap.gl.STATIC_DRAW); |
| 515 | |
| 516 | // There are 6 indices in textureCoordinates. |
| 517 | gMap.gl.drawArrays(gMap.gl.TRIANGLES, 0, 6); |
| 518 | }, |
| 519 | |
| 520 | loadImageToTexture: function(aImage, aTileKey) { |
| 521 | // Create and bind texture. |
| 522 | gMap.glTextures[aTileKey] = gMap.gl.createTexture(); |
| 523 | gMap.gl.bindTexture(gMap.gl.TEXTURE_2D, gMap.glTextures[aTileKey]); |
| 524 | // Set params for how the texture minifies and magnifies (wrap params are not needed as we're power-of-two). |
| 525 | gMap.gl.texParameteri(gMap.gl.TEXTURE_2D, gMap.gl.TEXTURE_MIN_FILTER, gMap.gl.NEAREST); |
| 526 | gMap.gl.texParameteri(gMap.gl.TEXTURE_2D, gMap.gl.TEXTURE_MAG_FILTER, gMap.gl.NEAREST); |
| 527 | // Upload the image into the texture. |
| 528 | gMap.gl.texImage2D(gMap.gl.TEXTURE_2D, 0, gMap.gl.RGBA, gMap.gl.RGBA, gMap.gl.UNSIGNED_BYTE, aImage); |
| 529 | }, |
| 530 | |
| 531 | cleanTextures: function() { |
| 532 | // Get rid of unneeded textures to save memory. |
| 533 | // TODO: Be less aggressive, maybe keep neighboring zoom levels (but x/y coords there are zoom-specific). |
| 534 | if (!gMap.glTexturesPerZoomLevel) { |
| 535 | // Calculate how many textures we need to keep for one zoom level. |
| 536 | // ceil(width/size) gives us the minimum, keep one on either side as well. |
| 537 | gMap.glTexturesPerZoomLevel = |
| 538 | Math.ceil(gMap.gl.drawingBufferWidth / gMap.tileSize + 2) * |
| 539 | Math.ceil(gMap.gl.drawingBufferHeight / gMap.tileSize + 2); |
| 540 | console.log("Keeping " + gMap.glTexturesPerZoomLevel + " textures per level"); |
| 541 | } |
| 542 | if (Object.keys(gMap.glTextures).length > gMap.glTexturesPerZoomLevel) { |
| 543 | console.log("Cleaning textures... (have " + Object.keys(gMap.glTextures).length + " atm)"); |
| 544 | |
| 545 | // Find coordinate ranges for tiles to keep. |
| 546 | var tMin = normalizeCoords({x: Math.floor((gMap.pos.x - gMap.baseDim.wid / 2) / gMap.baseDim.tsize) - 1, |
| 547 | y: Math.floor((gMap.pos.y - gMap.baseDim.ht / 2) / gMap.baseDim.tsize) - 1, |
| 548 | z: gMap.pos.z}); |
| 549 | var tMax = normalizeCoords({x: Math.ceil((gMap.pos.x + gMap.baseDim.wid / 2) / gMap.baseDim.tsize) + 1, |
| 550 | y: Math.ceil((gMap.pos.y + gMap.baseDim.ht / 2) / gMap.baseDim.tsize) + 1, |
| 551 | z: gMap.pos.z}); |
| 552 | console.log("In range: " + tMin.x + "," + tMin.y + "," + tMin.z + " - " + tMax.x + "," + tMax.y + "," + tMax.z); |
| 553 | for (var tileKey in gMap.glTextures) { |
| 554 | var keyMatches = tileKey.match(/([^:]+)::(\d+),(\d+),(\d+)/); |
| 555 | if (keyMatches && keyMatches[1] != "loading") { |
| 556 | var txData = { |
| 557 | style: keyMatches[1], |
| 558 | x: keyMatches[2], |
| 559 | y: keyMatches[3], |
| 560 | z: keyMatches[4], |
| 561 | } |
| 562 | var delTx = false; |
| 563 | if (txData.style != gMap.activeMap) { delTx = true; console.log("Different map style: " + txData.style); } |
| 564 | if (!delTx && (txData.z < tMin.z || txData.z > tMax.z)) { delTx = true; console.log("Out-of-range zoom: " + txData.z); } |
| 565 | if (tMin.x < tMax.x) { |
| 566 | if (!delTx && (txData.x < tMin.x || txData.x > tMax.x)) { delTx = true; console.log("Out-of-range X: " + txData.x); } |
| 567 | } |
| 568 | else { |
| 569 | // We are crossing over the 0 coordinate! |
| 570 | if (!delTx && (txData.x < tMin.x && txData.x > tMax.x)) { delTx = true; console.log("Out-of-range X: " + txData.x); } |
| 571 | } |
| 572 | if (tMin.y < tMax.y) { |
| 573 | if (!delTx && (txData.y < tMin.y || txData.y > tMax.y)) { delTx = true; console.log("Out-of-range Y: " + txData.y); } |
| 574 | } |
| 575 | else { |
| 576 | // We are crossing over the 0 coordinate! |
| 577 | if (!delTx && (txData.y < tMin.y && txData.y > tMax.y)) { delTx = true; console.log("Out-of-range Y: " + txData.y); } |
| 578 | } |
| 579 | if (delTx) { |
| 580 | // Delete texture from GL and from the array we are holding. |
| 581 | gMap.gl.deleteTexture(gMap.glTextures[tileKey]); |
| 582 | delete gMap.glTextures[tileKey]; |
| 583 | } |
| 584 | } |
| 585 | } |
| 586 | console.log("Cleaning complete, " + Object.keys(gMap.glTextures).length + " textures left"); |
| 587 | } |
| 588 | }, |
| 589 | |
| 590 | handleContextLost: function(event) { |
| 591 | event.preventDefault(); |
| 592 | // GL context is gone, let's reset everything that depends on it. |
| 593 | clearInterval(gMap.glTxCleanIntervalID); |
| 594 | gMap.glTextures = {}; |
| 595 | }, |
| 596 | |
| 597 | handleContextRestored: function(event) { |
| 598 | // When GL context is back, init GL again and draw. |
| 599 | gMap.initGL(); |
| 600 | gMap.draw(); |
| 601 | }, |
| 602 | } |
| 603 | |
| 604 | // Using scale(x, y) together with drawing old data on scaled canvas would be an improvement for zooming. |
| 605 | // See https://developer.mozilla.org/en-US/docs/Canvas_tutorial/Transformations#Scaling |
| 606 | |
| 607 | function zoomIn() { |
| 608 | if (gMap.pos.z < gMap.maxZoom) { |
| 609 | gMap.pos.z++; |
| 610 | gMap.draw(); |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | function zoomOut() { |
| 615 | if (gMap.pos.z > 0) { |
| 616 | gMap.pos.z--; |
| 617 | gMap.draw(); |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | function zoomTo(aTargetLevel) { |
| 622 | aTargetLevel = parseInt(aTargetLevel); |
| 623 | if (aTargetLevel >= 0 && aTargetLevel <= gMap.maxZoom) { |
| 624 | gMap.pos.z = aTargetLevel; |
| 625 | gMap.draw(); |
| 626 | } |
| 627 | } |
| 628 | |
| 629 | function gps2xy(aLatitude, aLongitude) { |
| 630 | var maxZoomFactor = Math.pow(2, gMap.maxZoom) * gMap.tileSize; |
| 631 | var convLat = aLatitude * Math.PI / 180; |
| 632 | var rawY = (1 - Math.log(Math.tan(convLat) + |
| 633 | 1 / Math.cos(convLat)) / Math.PI) / 2 * maxZoomFactor; |
| 634 | var rawX = (aLongitude + 180) / 360 * maxZoomFactor; |
| 635 | return {x: Math.round(rawX), |
| 636 | y: Math.round(rawY)}; |
| 637 | } |
| 638 | |
| 639 | function xy2gps(aX, aY) { |
| 640 | var maxZoomFactor = Math.pow(2, gMap.maxZoom) * gMap.tileSize; |
| 641 | var n = Math.PI - 2 * Math.PI * aY / maxZoomFactor; |
| 642 | return {latitude: 180 / Math.PI * |
| 643 | Math.atan(0.5 * (Math.exp(n) - Math.exp(-n))), |
| 644 | longitude: aX / maxZoomFactor * 360 - 180}; |
| 645 | } |
| 646 | |
| 647 | function setMapStyle() { |
| 648 | var mapSel = document.getElementById("mapSelector"); |
| 649 | if (mapSel.selectedIndex >= 0 && gMap.activeMap != mapSel.value) { |
| 650 | gMap.activeMap = mapSel.value; |
| 651 | gPrefs.set("active_map_style", gMap.activeMap); |
| 652 | document.getElementById("copyright").innerHTML = |
| 653 | gMapStyles[gMap.activeMap].copyright; |
| 654 | if (!gWaitCounter) { // Only do this when prefs are loaded already. |
| 655 | showUI(); |
| 656 | gMap.draw(); |
| 657 | } |
| 658 | } |
| 659 | } |
| 660 | |
| 661 | // A sane mod function that works for negative numbers. |
| 662 | // Returns a % b. |
| 663 | function mod(a, b) { |
| 664 | return ((a % b) + b) % b; |
| 665 | } |
| 666 | |
| 667 | function normalizeCoords(aCoords) { |
| 668 | var zoomFactor = Math.pow(2, aCoords.z); |
| 669 | return {x: mod(aCoords.x, zoomFactor), |
| 670 | y: mod(aCoords.y, zoomFactor), |
| 671 | z: aCoords.z}; |
| 672 | } |
| 673 | |
| 674 | function getTileKey(aStyle, aNormalizedCoords) { |
| 675 | return aStyle + "::" + |
| 676 | aNormalizedCoords.x + "," + |
| 677 | aNormalizedCoords.y + "," + |
| 678 | aNormalizedCoords.z; |
| 679 | } |
| 680 | |
| 681 | // Returns true if the tile is outside the current view. |
| 682 | function isOutsideWindow(t) { |
| 683 | var pos = decodeIndex(t); |
| 684 | |
| 685 | var zoomFactor = Math.pow(2, gMap.maxZoom - pos.z); |
| 686 | var wid = gMap.width * zoomFactor; |
| 687 | var ht = gMap.height * zoomFactor; |
| 688 | |
| 689 | pos.x *= zoomFactor; |
| 690 | pos.y *= zoomFactor; |
| 691 | |
| 692 | var sz = gMap.tileSize * zoomFactor; |
| 693 | if (pos.x > gMap.pos.x + wid / 2 || pos.y > gMap.pos.y + ht / 2 || |
| 694 | pos.x + sz < gMap.pos.x - wid / 2 || pos.y - sz < gMap.pos.y - ht / 2) |
| 695 | return true; |
| 696 | return false; |
| 697 | } |
| 698 | |
| 699 | function encodeIndex(x, y, z) { |
| 700 | var norm = normalizeCoords({x: x, y: y, z: z}); |
| 701 | return norm.x + "," + norm.y + "," + norm.z; |
| 702 | } |
| 703 | |
| 704 | function decodeIndex(encodedIdx) { |
| 705 | var ind = encodedIdx.split(",", 3); |
| 706 | return {x: ind[0], y: ind[1], z: ind[2]}; |
| 707 | } |
| 708 | |
| 709 | function drawTrack() { |
| 710 | if (gDrawing) { return; } |
| 711 | gDrawing = true; |
| 712 | if (gTrackContext && (document.hidden != true)) { // Only draw if we're actually visible. |
| 713 | gLastDrawnPoint = null; |
| 714 | gCurPosMapCache = undefined; |
| 715 | gTrackContext.clearRect(0, 0, gTrackCanvas.width, gTrackCanvas.height); |
| 716 | if (gTrack.length) { |
| 717 | for (var i = 0; i < gTrack.length; i++) { |
| 718 | drawTrackPoint(gTrack[i].coords.latitude, gTrack[i].coords.longitude, |
| 719 | (i + 1 >= gTrack.length || gTrack[i+1].beginSegment)); |
| 720 | } |
| 721 | } |
| 722 | } |
| 723 | gDrawing = false; |
| 724 | } |
| 725 | |
| 726 | function drawTrackPoint(aLatitude, aLongitude, aLastPoint) { |
| 727 | var trackpoint = {"worldpos": gps2xy(aLatitude, aLongitude)}; |
| 728 | var update_drawnpoint = true; |
| 729 | // lastPoint is for optimizing (not actually executing the draw until the last) |
| 730 | trackpoint.segmentEnd = (aLastPoint === true); |
| 731 | trackpoint.optimized = (aLastPoint === false); |
| 732 | trackpoint.mappos = {x: Math.round((trackpoint.worldpos.x - gMap.pos.x) / gMap.zoomFactor + gMap.width / 2), |
| 733 | y: Math.round((trackpoint.worldpos.y - gMap.pos.y) / gMap.zoomFactor + gMap.height / 2)}; |
| 734 | trackpoint.skip_drawing = false; |
| 735 | if (gLastDrawnPoint) { |
| 736 | // Lines completely outside the current display should not be drawn. |
| 737 | if ((trackpoint.mappos.x < 0 && gLastDrawnPoint.mappos.x < 0) || |
| 738 | (trackpoint.mappos.x > gMap.width && gLastDrawnPoint.mappos.x > gMap.width) || |
| 739 | (trackpoint.mappos.y < 0 && gLastDrawnPoint.mappos.y < 0) || |
| 740 | (trackpoint.mappos.y > gMap.height && gLastDrawnPoint.mappos.y > gMap.height)) { |
| 741 | trackpoint.skip_drawing = true; |
| 742 | } |
| 743 | } |
| 744 | if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) { |
| 745 | gTrackContext.strokeStyle = gTrackColor; |
| 746 | gTrackContext.fillStyle = gTrackContext.strokeStyle; |
| 747 | gTrackContext.lineWidth = gTrackWidth; |
| 748 | gTrackContext.lineCap = "round"; |
| 749 | gTrackContext.lineJoin = "round"; |
| 750 | } |
| 751 | // This breaks optimiziation, so make sure to reset optimization. |
| 752 | if (trackpoint.skip_drawing || !gLastDrawnPoint) { |
| 753 | trackpoint.optimized = false; |
| 754 | // Close path if one was open. |
| 755 | if (gLastDrawnPoint && gLastDrawnPoint.optimized) { |
| 756 | gTrackContext.stroke(); |
| 757 | } |
| 758 | } |
| 759 | if (!trackpoint.skip_drawing) { |
| 760 | if (gLastDrawnPoint && gLastDrawnPoint.skip_drawing && !gLastDrawnPoint.segmentEnd) { |
| 761 | // If the last point was skipped but the current one isn't, draw a segment start |
| 762 | // for the off-screen previous one as well as a connection line. |
| 763 | gTrackContext.beginPath(); |
| 764 | gTrackContext.arc(gLastDrawnPoint.mappos.x, gLastDrawnPoint.mappos.y, |
| 765 | gTrackContext.lineWidth, 0, Math.PI * 2, false); |
| 766 | gTrackContext.fill(); |
| 767 | gTrackContext.lineTo(trackpoint.mappos.x, trackpoint.mappos.y); |
| 768 | } |
| 769 | else if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) { |
| 770 | // Start drawing a segment with the current point. |
| 771 | gTrackContext.beginPath(); |
| 772 | gTrackContext.arc(trackpoint.mappos.x, trackpoint.mappos.y, |
| 773 | gTrackContext.lineWidth, 0, Math.PI * 2, false); |
| 774 | gTrackContext.fill(); |
| 775 | } |
| 776 | else if (!trackpoint.segmentEnd && gLastDrawnPoint && |
| 777 | (Math.abs(gLastDrawnPoint.mappos.x - trackpoint.mappos.x) <= 1) && |
| 778 | (Math.abs(gLastDrawnPoint.mappos.y - trackpoint.mappos.y) <= 1)) { |
| 779 | // We would draw the same or almost the same point, don't do any actual drawing. |
| 780 | update_drawnpoint = false; |
| 781 | } |
| 782 | else { |
| 783 | // Continue drawing segment, close if needed. |
| 784 | gTrackContext.lineTo(trackpoint.mappos.x, trackpoint.mappos.y); |
| 785 | if (!trackpoint.optimized) |
| 786 | gTrackContext.stroke(); |
| 787 | } |
| 788 | } |
| 789 | if (update_drawnpoint) { |
| 790 | gLastDrawnPoint = trackpoint; |
| 791 | } |
| 792 | } |
| 793 | |
| 794 | function drawCurrentLocation(trackPoint) { |
| 795 | var locpoint = gps2xy(trackPoint.coords.latitude, trackPoint.coords.longitude); |
| 796 | var circleRadius = Math.round(gCurLocSize / 2); |
| 797 | var mappos = {x: Math.round((locpoint.x - gMap.pos.x) / gMap.zoomFactor + gMap.width / 2), |
| 798 | y: Math.round((locpoint.y - gMap.pos.y) / gMap.zoomFactor + gMap.height / 2)}; |
| 799 | |
| 800 | undrawCurrentLocation(); |
| 801 | |
| 802 | // Cache overdrawn area. |
| 803 | gCurPosMapCache = |
| 804 | {point: locpoint, |
| 805 | radius: circleRadius, |
| 806 | data: gTrackContext.getImageData(mappos.x - circleRadius, |
| 807 | mappos.y - circleRadius, |
| 808 | circleRadius * 2, circleRadius * 2)}; |
| 809 | |
| 810 | gTrackContext.strokeStyle = gCurLocColor; |
| 811 | gTrackContext.fillStyle = gTrackContext.strokeStyle; |
| 812 | gTrackContext.beginPath(); |
| 813 | gTrackContext.arc(mappos.x, mappos.y, |
| 814 | circleRadius, 0, Math.PI * 2, false); |
| 815 | gTrackContext.fill(); |
| 816 | } |
| 817 | |
| 818 | function undrawCurrentLocation() { |
| 819 | if (gCurPosMapCache) { |
| 820 | var oldpoint = gCurPosMapCache.point; |
| 821 | var oldmp = {x: Math.round((oldpoint.x - gMap.pos.x) / gMap.zoomFactor + gMap.width / 2), |
| 822 | y: Math.round((oldpoint.y - gMap.pos.y) / gMap.zoomFactor + gMap.height / 2)}; |
| 823 | gTrackContext.putImageData(gCurPosMapCache.data, |
| 824 | oldmp.x - gCurPosMapCache.radius, |
| 825 | oldmp.y - gCurPosMapCache.radius); |
| 826 | gCurPosMapCache = undefined; |
| 827 | } |
| 828 | } |
| 829 | |
| 830 | function calcTrackDuration() { |
| 831 | // Get the duration of the track in s. |
| 832 | var tDuration = 0; |
| 833 | if (gTrack.length > 1) { |
| 834 | for (var i = 1; i < gTrack.length; i++) { |
| 835 | if (!gTrack[i].beginSegment) { |
| 836 | tDuration += (gTrack[i].time - gTrack[i-1].time); |
| 837 | } |
| 838 | } |
| 839 | } |
| 840 | return Math.round(tDuration / 1000); // The timestamps are in ms but we return seconds. |
| 841 | } |
| 842 | |
| 843 | function calcTrackLength() { |
| 844 | // Get the length of the track in km. |
| 845 | var tLength = 0; |
| 846 | if (gTrack.length > 1) { |
| 847 | for (var i = 1; i < gTrack.length; i++) { |
| 848 | if (!gTrack[i].beginSegment) { |
| 849 | tLength += getPointDistance(gTrack[i-1].coords, gTrack[i].coords); |
| 850 | } |
| 851 | } |
| 852 | } |
| 853 | return tLength; |
| 854 | } |
| 855 | |
| 856 | function getPointDistance(aGPSPoint1, aGPSPoint2) { |
| 857 | // Get the distance in km between the two given GPS points. |
| 858 | // See http://stackoverflow.com/questions/365826/calculate-distance-between-2-gps-coordinates |
| 859 | // Earth is almost exactly a sphere and we calculate small distances on the surface, so we can do spherical great-circle math. |
| 860 | // Also see http://en.wikipedia.org/wiki/Great-circle_distance |
| 861 | var R = 6371; // km |
| 862 | var dLat = deg2rad(aGPSPoint2.latitude - aGPSPoint1.latitude); |
| 863 | var dLon = deg2rad(aGPSPoint2.longitude - aGPSPoint1.longitude); |
| 864 | var lat1 = deg2rad(aGPSPoint1.latitude); |
| 865 | var lat2 = deg2rad(aGPSPoint2.latitude); |
| 866 | |
| 867 | var a = Math.sin(dLat/2) * Math.sin(dLat/2) + |
| 868 | Math.sin(dLon/2) * Math.sin(dLon/2) * Math.cos(lat1) * Math.cos(lat2); |
| 869 | var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); |
| 870 | return R * c; |
| 871 | } |
| 872 | |
| 873 | function deg2rad(aDegreeValue) { |
| 874 | // Convert an angle in degrees to radiants. |
| 875 | return aDegreeValue * (Math.PI / 180); |
| 876 | } |
| 877 | |
| 878 | var mapEvHandler = { |
| 879 | handleEvent: function(aEvent) { |
| 880 | var touchEvent = aEvent.type.indexOf('touch') != -1; |
| 881 | |
| 882 | if (touchEvent) { |
| 883 | aEvent.stopPropagation(); |
| 884 | } |
| 885 | |
| 886 | // Bail out if the event is happening on an input. |
| 887 | if (aEvent.target.tagName.toLowerCase() == "input") |
| 888 | return; |
| 889 | |
| 890 | // Bail out on unwanted map moves, but not zoom or keyboard events. |
| 891 | if (aEvent.type.indexOf("mouse") === 0 || aEvent.type.indexOf("touch") === 0) { |
| 892 | // Bail out if this is neither a touch nor left-click. |
| 893 | if (!touchEvent && aEvent.button != 0) |
| 894 | return; |
| 895 | |
| 896 | // Bail out if the started touch can't be found. |
| 897 | if (touchEvent && gDragging && |
| 898 | !aEvent.targetTouches.item(0)) |
| 899 | return; |
| 900 | } |
| 901 | |
| 902 | var coordObj = touchEvent ? |
| 903 | aEvent.targetTouches.item(0) : |
| 904 | aEvent; |
| 905 | |
| 906 | switch (aEvent.type) { |
| 907 | case "mousedown": |
| 908 | case "touchstart": |
| 909 | if (touchEvent) { |
| 910 | if (aEvent.targetTouches.length == 2) { |
| 911 | gPinchStartWidth = Math.sqrt( |
| 912 | Math.pow(aEvent.targetTouches.item(1).clientX - |
| 913 | aEvent.targetTouches.item(0).clientX, 2) + |
| 914 | Math.pow(aEvent.targetTouches.item(1).clientY - |
| 915 | aEvent.targetTouches.item(0).clientY, 2) |
| 916 | ); |
| 917 | } |
| 918 | coordObj = aEvent.targetTouches.item(0); |
| 919 | } |
| 920 | var x = coordObj.clientX - gGLMapCanvas.offsetLeft; |
| 921 | var y = coordObj.clientY - gGLMapCanvas.offsetTop; |
| 922 | |
| 923 | if (touchEvent || aEvent.button === 0) { |
| 924 | gDragging = true; |
| 925 | } |
| 926 | gLastMouseX = x; |
| 927 | gLastMouseY = y; |
| 928 | showUI(); |
| 929 | break; |
| 930 | case "mousemove": |
| 931 | case "touchmove": |
| 932 | if (touchEvent && aEvent.targetTouches.length == 2) { |
| 933 | curPinchStartWidth = Math.sqrt( |
| 934 | Math.pow(aEvent.targetTouches.item(1).clientX - |
| 935 | aEvent.targetTouches.item(0).clientX, 2) + |
| 936 | Math.pow(aEvent.targetTouches.item(1).clientY - |
| 937 | aEvent.targetTouches.item(0).clientY, 2) |
| 938 | ); |
| 939 | if (!gPinchStartWidth) |
| 940 | gPinchStartWidth = curPinchStartWidth; |
| 941 | |
| 942 | if (gPinchStartWidth / curPinchStartWidth > 1.7 || |
| 943 | gPinchStartWidth / curPinchStartWidth < 0.6) { |
| 944 | var newZoomLevel = gMap.pos.z + (gPinchStartWidth < curPinchStartWidth ? 1 : -1); |
| 945 | if ((newZoomLevel >= 0) && (newZoomLevel <= gMap.maxZoom)) { |
| 946 | // Calculate new center of the map - preserve middle of pinch. |
| 947 | // This means that pixel distance between old center and middle |
| 948 | // must equal pixel distance of new center and middle. |
| 949 | var x = (aEvent.targetTouches.item(1).clientX + |
| 950 | aEvent.targetTouches.item(0).clientX) / 2 - |
| 951 | gGLMapCanvas.offsetLeft; |
| 952 | var y = (aEvent.targetTouches.item(1).clientY + |
| 953 | aEvent.targetTouches.item(0).clientY) / 2 - |
| 954 | gGLMapCanvas.offsetTop; |
| 955 | |
| 956 | // Zoom factor after this action. |
| 957 | var newZoomFactor = Math.pow(2, gMap.maxZoom - newZoomLevel); |
| 958 | gMap.pos.x -= (x - gMap.width / 2) * (newZoomFactor - gMap.zoomFactor); |
| 959 | gMap.pos.y -= (y - gMap.height / 2) * (newZoomFactor - gMap.zoomFactor); |
| 960 | |
| 961 | if (gPinchStartWidth < curPinchStartWidth) |
| 962 | zoomIn(); |
| 963 | else |
| 964 | zoomOut(); |
| 965 | |
| 966 | // Reset pinch start width and start another pinch gesture. |
| 967 | gPinchStartWidth = null; |
| 968 | } |
| 969 | } |
| 970 | // If we are in a pinch, do not drag. |
| 971 | break; |
| 972 | } |
| 973 | var x = coordObj.clientX - gGLMapCanvas.offsetLeft; |
| 974 | var y = coordObj.clientY - gGLMapCanvas.offsetTop; |
| 975 | if (gDragging === true) { |
| 976 | var dX = x - gLastMouseX; |
| 977 | var dY = y - gLastMouseY; |
| 978 | gMap.pos.x -= dX * gMap.zoomFactor; |
| 979 | gMap.pos.y -= dY * gMap.zoomFactor; |
| 980 | gMap.draw(); |
| 981 | showUI(); |
| 982 | } |
| 983 | gLastMouseX = x; |
| 984 | gLastMouseY = y; |
| 985 | break; |
| 986 | case "mouseup": |
| 987 | case "touchend": |
| 988 | gPinchStartWidth = null; |
| 989 | gDragging = false; |
| 990 | showUI(); |
| 991 | break; |
| 992 | case "mouseout": |
| 993 | case "touchcancel": |
| 994 | case "touchleave": |
| 995 | //gDragging = false; |
| 996 | break; |
| 997 | case "wheel": |
| 998 | // If we'd want pixels, we'd need to calc up using aEvent.deltaMode. |
| 999 | // See https://developer.mozilla.org/en-US/docs/Mozilla_event_reference/wheel |
| 1000 | |
| 1001 | // Only accept (non-null) deltaY values |
| 1002 | if (!aEvent.deltaY) |
| 1003 | break; |
| 1004 | |
| 1005 | // Debug output: "coordinates" of the point the mouse was over. |
| 1006 | /* |
| 1007 | var ptCoord = {x: gMap.pos.x + (x - gMap.width / 2) * gMap.zoomFactor, |
| 1008 | y: gMap.pos.y + (x - gMap.height / 2) * gMap.zoomFactor}; |
| 1009 | var gpsCoord = xy2gps(ptCoord.x, ptCoord.y); |
| 1010 | var pt2Coord = gps2xy(gpsCoord.latitude, gpsCoord.longitude); |
| 1011 | console.log(ptCoord.x + "/" + ptCoord.y + " - " + |
| 1012 | gpsCoord.latitude + "/" + gpsCoord.longitude + " - " + |
| 1013 | pt2Coord.x + "/" + pt2Coord.y); |
| 1014 | */ |
| 1015 | |
| 1016 | var newZoomLevel = gMap.pos.z + (aEvent.deltaY < 0 ? 1 : -1); |
| 1017 | if ((newZoomLevel >= 0) && (newZoomLevel <= gMap.maxZoom)) { |
| 1018 | // Calculate new center of the map - same point stays under the mouse. |
| 1019 | // This means that the pixel distance between the old center and point |
| 1020 | // must equal the pixel distance of the new center and that point. |
| 1021 | var x = coordObj.clientX - gGLMapCanvas.offsetLeft; |
| 1022 | var y = coordObj.clientY - gGLMapCanvas.offsetTop; |
| 1023 | |
| 1024 | // Zoom factor after this action. |
| 1025 | var newZoomFactor = Math.pow(2, gMap.maxZoom - newZoomLevel); |
| 1026 | gMap.pos.x -= (x - gMap.width / 2) * (newZoomFactor - gMap.zoomFactor); |
| 1027 | gMap.pos.y -= (y - gMap.height / 2) * (newZoomFactor - gMap.zoomFactor); |
| 1028 | |
| 1029 | if (aEvent.deltaY < 0) |
| 1030 | zoomIn(); |
| 1031 | else |
| 1032 | zoomOut(); |
| 1033 | } |
| 1034 | break; |
| 1035 | case "keydown": |
| 1036 | // Allow keyboard control to move and zoom the map. |
| 1037 | // Should use aEvent.key instead of aEvent.which but needs bug 680830. |
| 1038 | // See https://developer.mozilla.org/en-US/docs/DOM/Mozilla_event_reference/keydown |
| 1039 | var dX = 0; |
| 1040 | var dY = 0; |
| 1041 | switch (aEvent.which) { |
| 1042 | case 39: // right |
| 1043 | dX = -gMap.tileSize / 2; |
| 1044 | break; |
| 1045 | case 37: // left |
| 1046 | dX = gMap.tileSize / 2; |
| 1047 | break; |
| 1048 | case 38: // up |
| 1049 | dY = gMap.tileSize / 2; |
| 1050 | break; |
| 1051 | case 40: // down |
| 1052 | dY = -gMap.tileSize / 2; |
| 1053 | break; |
| 1054 | case 87: // w |
| 1055 | case 107: // + (numpad) |
| 1056 | case 171: // + (normal key) |
| 1057 | zoomIn(); |
| 1058 | break; |
| 1059 | case 83: // s |
| 1060 | case 109: // - (numpad) |
| 1061 | case 173: // - (normal key) |
| 1062 | zoomOut(); |
| 1063 | break; |
| 1064 | case 48: // 0 |
| 1065 | case 49: // 1 |
| 1066 | case 50: // 2 |
| 1067 | case 51: // 3 |
| 1068 | case 52: // 4 |
| 1069 | case 53: // 5 |
| 1070 | case 54: // 6 |
| 1071 | case 55: // 7 |
| 1072 | case 56: // 8 |
| 1073 | zoomTo(aEvent.which - 38); |
| 1074 | break; |
| 1075 | case 57: // 9 |
| 1076 | zoomTo(9); |
| 1077 | break; |
| 1078 | case 96: // 0 (numpad) |
| 1079 | case 97: // 1 (numpad) |
| 1080 | case 98: // 2 (numpad) |
| 1081 | case 99: // 3 (numpad) |
| 1082 | case 100: // 4 (numpad) |
| 1083 | case 101: // 5 (numpad) |
| 1084 | case 102: // 6 (numpad) |
| 1085 | case 103: // 7 (numpad) |
| 1086 | case 104: // 8 (numpad) |
| 1087 | zoomTo(aEvent.which - 86); |
| 1088 | break; |
| 1089 | case 105: // 9 (numpad) |
| 1090 | zoomTo(9); |
| 1091 | break; |
| 1092 | default: // not supported |
| 1093 | console.log("key not supported: " + aEvent.which); |
| 1094 | break; |
| 1095 | } |
| 1096 | |
| 1097 | // Move if needed. |
| 1098 | if (dX || dY) { |
| 1099 | gMap.pos.x -= dX * gMap.zoomFactor; |
| 1100 | gMap.pos.y -= dY * gMap.zoomFactor; |
| 1101 | gMap.draw(); |
| 1102 | } |
| 1103 | break; |
| 1104 | } |
| 1105 | } |
| 1106 | }; |
| 1107 | |
| 1108 | function visibilityEvHandler() { |
| 1109 | // Immediately draw if we just got visible. |
| 1110 | if (document.hidden != true) { |
| 1111 | gMap.draw(); |
| 1112 | } |
| 1113 | // No need to handle the event where we become invisible as we care only draw |
| 1114 | // when we are visible anyhow. |
| 1115 | } |
| 1116 | |
| 1117 | var geofake = { |
| 1118 | tracking: false, |
| 1119 | lastPos: {x: undefined, y: undefined}, |
| 1120 | watchPosition: function(aSuccessCallback, aErrorCallback, aPrefObject) { |
| 1121 | this.tracking = true; |
| 1122 | var watchCall = function() { |
| 1123 | // calc new position in lat/lon degrees |
| 1124 | // 90° on Earth surface are ~10,000 km at the equator, |
| 1125 | // so try moving at most 10m at a time |
| 1126 | if (geofake.lastPos.x) |
| 1127 | geofake.lastPos.x += (Math.random() - .5) * 90 / 1000000 |
| 1128 | else |
| 1129 | geofake.lastPos.x = 48.208174 |
| 1130 | if (geofake.lastPos.y) |
| 1131 | geofake.lastPos.y += (Math.random() - .5) * 90 / 1000000 |
| 1132 | else |
| 1133 | geofake.lastPos.y = 16.373819 |
| 1134 | aSuccessCallback({timestamp: Date.now(), |
| 1135 | coords: {latitude: geofake.lastPos.x, |
| 1136 | longitude: geofake.lastPos.y, |
| 1137 | accuracy: 20}}); |
| 1138 | if (geofake.tracking) |
| 1139 | setTimeout(watchCall, 1000); |
| 1140 | }; |
| 1141 | setTimeout(watchCall, 1000); |
| 1142 | return "foo"; |
| 1143 | }, |
| 1144 | clearWatch: function(aID) { |
| 1145 | this.tracking = false; |
| 1146 | } |
| 1147 | } |
| 1148 | |
| 1149 | function setCentering(aCheckbox) { |
| 1150 | if (gMapPrefsLoaded && mainDB) |
| 1151 | gPrefs.set("center_map", aCheckbox.checked); |
| 1152 | gCenterPosition = aCheckbox.checked; |
| 1153 | } |
| 1154 | |
| 1155 | function setTracking(aCheckbox) { |
| 1156 | if (gMapPrefsLoaded && mainDB) |
| 1157 | gPrefs.set("tracking_enabled", aCheckbox.checked); |
| 1158 | if (aCheckbox.checked) |
| 1159 | startTracking(); |
| 1160 | else |
| 1161 | endTracking(); |
| 1162 | } |
| 1163 | |
| 1164 | function startTracking() { |
| 1165 | if (gGeolocation) { |
| 1166 | gActionLabel.textContent = "Establishing Position"; |
| 1167 | gAction.style.display = "block"; |
| 1168 | if (navigator.requestWakeLock) { |
| 1169 | gGPSWakeLock = navigator.requestWakeLock("gps"); |
| 1170 | } |
| 1171 | gGeoWatchID = gGeolocation.watchPosition( |
| 1172 | function(position) { |
| 1173 | if (gActionLabel.textContent) { |
| 1174 | gActionLabel.textContent = ""; |
| 1175 | gAction.style.display = "none"; |
| 1176 | } |
| 1177 | // Coords spec: https://developer.mozilla.org/en/XPCOM_Interface_Reference/NsIDOMGeoPositionCoords |
| 1178 | var tPoint = {time: position.timestamp, |
| 1179 | coords: {latitude: position.coords.latitude, |
| 1180 | longitude: position.coords.longitude, |
| 1181 | altitude: position.coords.altitude, |
| 1182 | accuracy: position.coords.accuracy, |
| 1183 | altitudeAccuracy: position.coords.altitudeAccuracy, |
| 1184 | heading: position.coords.heading, |
| 1185 | speed: position.coords.speed}, |
| 1186 | beginSegment: !gLastTrackPoint}; |
| 1187 | // Only add point to track is accuracy is good enough. |
| 1188 | if (tPoint.coords.accuracy < gMinTrackAccuracy) { |
| 1189 | gLastTrackPoint = tPoint; |
| 1190 | gTrack.push(tPoint); |
| 1191 | try { gTrackStore.push(tPoint); } catch(e) {} |
| 1192 | var redrawn = false; |
| 1193 | if (gCenterPosition) { |
| 1194 | var posCoord = gps2xy(position.coords.latitude, |
| 1195 | position.coords.longitude); |
| 1196 | if (Math.abs(gMap.pos.x - posCoord.x) > gMap.width * gMap.zoomFactor / 4 || |
| 1197 | Math.abs(gMap.pos.y - posCoord.y) > gMap.height * gMap.zoomFactor / 4) { |
| 1198 | gMap.pos.x = posCoord.x; |
| 1199 | gMap.pos.y = posCoord.y; |
| 1200 | gMap.draw(); // This draws the current point as well. |
| 1201 | redrawn = true; |
| 1202 | } |
| 1203 | } |
| 1204 | if (!redrawn) |
| 1205 | undrawCurrentLocation(); |
| 1206 | drawTrackPoint(position.coords.latitude, position.coords.longitude, true); |
| 1207 | } |
| 1208 | drawCurrentLocation(tPoint); |
| 1209 | }, |
| 1210 | function(error) { |
| 1211 | // Ignore erros for the moment, but this is good for debugging. |
| 1212 | // See https://developer.mozilla.org/en/Using_geolocation#Handling_errors |
| 1213 | if (gDebug) |
| 1214 | console.log(error.message); |
| 1215 | }, |
| 1216 | {enableHighAccuracy: true} |
| 1217 | ); |
| 1218 | } |
| 1219 | } |
| 1220 | |
| 1221 | function endTracking() { |
| 1222 | if (gActionLabel.textContent) { |
| 1223 | gActionLabel.textContent = ""; |
| 1224 | gAction.style.display = "none"; |
| 1225 | } |
| 1226 | if (navigator.requestWakeLock && gGPSWakeLock) { |
| 1227 | console.log("releasing WakeLock"); |
| 1228 | gGPSWakeLock.unlock(); |
| 1229 | } |
| 1230 | if (gGeoWatchID) { |
| 1231 | gGeolocation.clearWatch(gGeoWatchID); |
| 1232 | } |
| 1233 | } |
| 1234 | |
| 1235 | function clearTrack() { |
| 1236 | gTrack = []; |
| 1237 | gTrackStore.clear(); |
| 1238 | drawTrack(); |
| 1239 | } |
| 1240 | |
| 1241 | function loadTrack(aTrackId) { |
| 1242 | fetchBackend("track_json?id=" + encodeURIComponent(aTrackId), "GET", null, |
| 1243 | function(aResult, aStatusCode) { |
| 1244 | if (aStatusCode >= 400 || !aResult) { |
| 1245 | console.log("loading track failed: " + aStatusCode + ", result: " + aResult.message); |
| 1246 | } |
| 1247 | else { |
| 1248 | console.log("loading track with " + aResult.length + " points."); |
| 1249 | gTrack = aResult; |
| 1250 | for (var i = 0; i < gTrack.length; i++) { |
| 1251 | try { gTrackStore.push(gTrack[i]); } catch(e) {} |
| 1252 | } |
| 1253 | drawTrack(); |
| 1254 | } |
| 1255 | } |
| 1256 | ); |
| 1257 | } |
| 1258 | |
| 1259 | var gTileService = { |
| 1260 | objStore: "tilecache", |
| 1261 | |
| 1262 | ageLimit: 14 * 86400 * 1000, // 2 weeks (in ms) |
| 1263 | |
| 1264 | get: function(aStyle, aCoords, aCallback) { |
| 1265 | var norm = normalizeCoords(aCoords); |
| 1266 | var dbkey = getTileKey(aStyle, norm); |
| 1267 | this.getDBCache(dbkey, function(aResult, aEvent) { |
| 1268 | if (aResult) { |
| 1269 | // We did get a cached object. |
| 1270 | aCallback(aResult.image, aStyle, aCoords, dbkey); |
| 1271 | // Look at the timestamp and return if it's not too old. |
| 1272 | if (aResult.timestamp + gTileService.ageLimit > Date.now()) |
| 1273 | return; |
| 1274 | // Reload cached tile otherwise. |
| 1275 | var oldDate = new Date(aResult.timestamp); |
| 1276 | console.log("reload cached tile: " + dbkey + " - " + oldDate.toUTCString()); |
| 1277 | } |
| 1278 | // Retrieve image from the web and store it in the cache. |
| 1279 | var XHR = new XMLHttpRequest(); |
| 1280 | XHR.open("GET", |
| 1281 | gMapStyles[aStyle].url |
| 1282 | .replace("{x}", norm.x) |
| 1283 | .replace("{y}", norm.y) |
| 1284 | .replace("{z}", norm.z) |
| 1285 | .replace("[a-c]", String.fromCharCode(97 + Math.floor(Math.random() * 3))) |
| 1286 | .replace("[a-d]", String.fromCharCode(97 + Math.floor(Math.random() * 4))) |
| 1287 | .replace("[1-4]", 1 + Math.floor(Math.random() * 4)), |
| 1288 | true); |
| 1289 | XHR.responseType = "blob"; |
| 1290 | XHR.addEventListener("load", function () { |
| 1291 | if (XHR.status === 200) { |
| 1292 | var blob = XHR.response; |
| 1293 | aCallback(blob, aStyle, aCoords, dbkey); |
| 1294 | gTileService.setDBCache(dbkey, {image: blob, timestamp: Date.now()}); |
| 1295 | } |
| 1296 | }, false); |
| 1297 | XHR.send(); |
| 1298 | }); |
| 1299 | }, |
| 1300 | |
| 1301 | getDBCache: function(aKey, aCallback) { |
| 1302 | if (!mainDB) |
| 1303 | return; |
| 1304 | var transaction = mainDB.transaction([this.objStore]); |
| 1305 | var request = transaction.objectStore(this.objStore).get(aKey); |
| 1306 | request.onsuccess = function(event) { |
| 1307 | aCallback(request.result, event); |
| 1308 | }; |
| 1309 | request.onerror = function(event) { |
| 1310 | // Errors can be handled here. |
| 1311 | aCallback(undefined, event); |
| 1312 | }; |
| 1313 | }, |
| 1314 | |
| 1315 | setDBCache: function(aKey, aValue, aCallback) { |
| 1316 | if (!mainDB) |
| 1317 | return; |
| 1318 | var success = false; |
| 1319 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 1320 | var objStore = transaction.objectStore(this.objStore); |
| 1321 | var request = objStore.put(aValue, aKey); |
| 1322 | request.onsuccess = function(event) { |
| 1323 | success = true; |
| 1324 | if (aCallback) |
| 1325 | aCallback(success, event); |
| 1326 | }; |
| 1327 | request.onerror = function(event) { |
| 1328 | // Errors can be handled here. |
| 1329 | if (aCallback) |
| 1330 | aCallback(success, event); |
| 1331 | }; |
| 1332 | }, |
| 1333 | |
| 1334 | unsetDBCache: function(aKey, aCallback) { |
| 1335 | if (!mainDB) |
| 1336 | return; |
| 1337 | var success = false; |
| 1338 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 1339 | var request = transaction.objectStore(this.objStore).delete(aKey); |
| 1340 | request.onsuccess = function(event) { |
| 1341 | success = true; |
| 1342 | if (aCallback) |
| 1343 | aCallback(success, event); |
| 1344 | }; |
| 1345 | request.onerror = function(event) { |
| 1346 | // Errors can be handled here. |
| 1347 | if (aCallback) |
| 1348 | aCallback(success, event); |
| 1349 | } |
| 1350 | }, |
| 1351 | |
| 1352 | clearDB: function(aCallback) { |
| 1353 | if (!mainDB) |
| 1354 | return; |
| 1355 | var success = false; |
| 1356 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 1357 | var request = transaction.objectStore(this.objStore).clear(); |
| 1358 | request.onsuccess = function(event) { |
| 1359 | success = true; |
| 1360 | console.log("Cache cleared."); |
| 1361 | if (aCallback) |
| 1362 | aCallback(success, event); |
| 1363 | }; |
| 1364 | request.onerror = function(event) { |
| 1365 | // Errors can be handled here. |
| 1366 | console.log("Error clearing cache!"); |
| 1367 | if (aCallback) |
| 1368 | aCallback(success, event); |
| 1369 | } |
| 1370 | } |
| 1371 | }; |