| 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 | osm_mapnik: |
| 18 | {name: "OpenStreetMap (Mapnik)", |
| 19 | url: "http://tile.openstreetmap.org/{z}/{x}/{y}.png", |
| 20 | 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>'}, |
| 21 | osm_cyclemap: |
| 22 | {name: "Cycle Map (OSM)", |
| 23 | url: "http://[a-c].tile.opencyclemap.org/cycle/{z}/{x}/{y}.png", |
| 24 | copyright: 'Map data and imagery © <a href="http://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="http://www.openstreetmap.org/copyright">ODbL/CC-BY-SA</a>'}, |
| 25 | osm_transmap: |
| 26 | {name: "Transport Map (OSM)", |
| 27 | url: "http://[a-c].tile2.opencyclemap.org/transport/{z}/{x}/{y}.png", |
| 28 | copyright: 'Map data and imagery © <a href="http://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="http://www.openstreetmap.org/copyright">ODbL/CC-BY-SA</a>'}, |
| 29 | mapquest_open: |
| 30 | {name: "MapQuest OSM", |
| 31 | url: "http://otile[1-4].mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.png", |
| 32 | 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>.'}, |
| 33 | mapquest_aerial: |
| 34 | {name: "MapQuest Open Aerial", |
| 35 | url: "http://otile[1-4].mqcdn.com/tiles/1.0.0/sat/{z}/{x}/{y}.jpg", |
| 36 | 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.'}, |
| 37 | opengeoserver_arial: |
| 38 | {name: "OpenGeoServer Aerial", |
| 39 | url: "http://services.opengeoserver.org/tiles/1.0.0/globe.aerial_EPSG3857/{z}/{x}/{y}.png?origin=nw", |
| 40 | copyright: 'Tiles by <a href="http://www.opengeoserver.org/">OpenGeoServer.org</a>, <a href="https://creativecommons.org/licenses/by/3.0/at/">CC-BY 3.0 AT</a>.'}, |
| 41 | google_map: |
| 42 | {name: "Google Maps", |
| 43 | url: " http://mt1.google.com/vt/x={x}&y={y}&z={z}", |
| 44 | copyright: 'Map data and imagery © <a href="http://maps.google.com/">Google</a>'}, |
| 45 | }; |
| 46 | |
| 47 | var gLastMouseX = 0; |
| 48 | var gLastMouseY = 0; |
| 49 | |
| 50 | var gLoadingTile; |
| 51 | |
| 52 | var gMapPrefsLoaded = false; |
| 53 | |
| 54 | var gDragging = false; |
| 55 | var gDragTouchID, gPinchStartWidth; |
| 56 | |
| 57 | var gGeoWatchID; |
| 58 | var gTrack = []; |
| 59 | var gLastTrackPoint, gLastDrawnPoint; |
| 60 | var gCenterPosition = true; |
| 61 | |
| 62 | var gCurPosMapCache; |
| 63 | |
| 64 | function initMap() { |
| 65 | gGeolocation = navigator.geolocation; |
| 66 | // Set up canvas context. |
| 67 | gGLMapCanvas = document.getElementById("map"); |
| 68 | try { |
| 69 | // Try to grab the standard context. If it fails, fallback to experimental. |
| 70 | // We also try to tell it we do not need a depth buffer. |
| 71 | gMap.gl = gGLMapCanvas.getContext("webgl", {depth: false}) || |
| 72 | gGLMapCanvas.getContext("experimental-webgl", {depth: false}); |
| 73 | } |
| 74 | catch(e) {} |
| 75 | // If we don't have a GL context, give up now |
| 76 | if (!gMap.gl) { |
| 77 | showGLWarningDialog(); |
| 78 | gMap.gl = null; |
| 79 | } |
| 80 | gTrackCanvas = document.getElementById("track"); |
| 81 | gTrackContext = gTrackCanvas.getContext("2d"); |
| 82 | if (!gMap.activeMap) |
| 83 | gMap.activeMap = "osm_mapnik"; |
| 84 | |
| 85 | //gDebug = true; |
| 86 | if (gDebug) { |
| 87 | gGeolocation = geofake; |
| 88 | var hiddenList = document.getElementsByClassName("debugHide"); |
| 89 | // last to first - list of elements with that class is changing! |
| 90 | for (var i = hiddenList.length - 1; i >= 0; i--) { |
| 91 | hiddenList[i].classList.remove("debugHide"); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | gAction.addEventListener("prefload-done", gMap.initGL, false); |
| 96 | |
| 97 | console.log("map vars set, loading prefs..."); |
| 98 | loadPrefs(); |
| 99 | } |
| 100 | |
| 101 | function loadPrefs(aEvent) { |
| 102 | if (aEvent && aEvent.type == "prefs-step") { |
| 103 | console.log("wait: " + gWaitCounter); |
| 104 | if (gWaitCounter == 0) { |
| 105 | gAction.removeEventListener(aEvent.type, loadPrefs, false); |
| 106 | gMapPrefsLoaded = true; |
| 107 | console.log("prefs loaded."); |
| 108 | |
| 109 | gTrackCanvas.addEventListener("mouseup", mapEvHandler, false); |
| 110 | gTrackCanvas.addEventListener("mousemove", mapEvHandler, false); |
| 111 | gTrackCanvas.addEventListener("mousedown", mapEvHandler, false); |
| 112 | gTrackCanvas.addEventListener("mouseout", mapEvHandler, false); |
| 113 | |
| 114 | gTrackCanvas.addEventListener("touchstart", mapEvHandler, false); |
| 115 | gTrackCanvas.addEventListener("touchmove", mapEvHandler, false); |
| 116 | gTrackCanvas.addEventListener("touchend", mapEvHandler, false); |
| 117 | gTrackCanvas.addEventListener("touchcancel", mapEvHandler, false); |
| 118 | gTrackCanvas.addEventListener("touchleave", mapEvHandler, false); |
| 119 | |
| 120 | gTrackCanvas.addEventListener("wheel", mapEvHandler, false); |
| 121 | |
| 122 | document.getElementById("body").addEventListener("keydown", mapEvHandler, false); |
| 123 | |
| 124 | console.log("Events added."); |
| 125 | document.getElementById("copyright").innerHTML = |
| 126 | gMapStyles[gMap.activeMap].copyright; |
| 127 | |
| 128 | gLoadingTile = new Image(); |
| 129 | gLoadingTile.src = "style/loading.png"; |
| 130 | gLoadingTile.onload = function() { |
| 131 | console.log("Loading Tile loaded."); |
| 132 | var throwEv = new CustomEvent("prefload-done"); |
| 133 | gAction.dispatchEvent(throwEv); |
| 134 | }; |
| 135 | } |
| 136 | } |
| 137 | else { |
| 138 | if (aEvent) |
| 139 | gAction.removeEventListener(aEvent.type, loadPrefs, false); |
| 140 | gAction.addEventListener("prefs-step", loadPrefs, false); |
| 141 | gWaitCounter++; |
| 142 | gPrefs.get("position", function(aValue) { |
| 143 | if (aValue && aValue.x && aValue.y && aValue.z) { |
| 144 | gMap.pos = aValue; |
| 145 | } |
| 146 | gWaitCounter--; |
| 147 | var throwEv = new CustomEvent("prefs-step"); |
| 148 | gAction.dispatchEvent(throwEv); |
| 149 | }); |
| 150 | gWaitCounter++; |
| 151 | gPrefs.get("center_map", function(aValue) { |
| 152 | if (aValue === undefined) |
| 153 | document.getElementById("centerCheckbox").checked = true; |
| 154 | else |
| 155 | document.getElementById("centerCheckbox").checked = aValue; |
| 156 | setCentering(document.getElementById("centerCheckbox")); |
| 157 | gWaitCounter--; |
| 158 | var throwEv = new CustomEvent("prefs-step"); |
| 159 | gAction.dispatchEvent(throwEv); |
| 160 | }); |
| 161 | gWaitCounter++; |
| 162 | gPrefs.get("tracking_enabled", function(aValue) { |
| 163 | if (aValue === undefined) |
| 164 | document.getElementById("trackCheckbox").checked = true; |
| 165 | else |
| 166 | document.getElementById("trackCheckbox").checked = aValue; |
| 167 | gWaitCounter--; |
| 168 | var throwEv = new CustomEvent("prefs-step"); |
| 169 | gAction.dispatchEvent(throwEv); |
| 170 | }); |
| 171 | gWaitCounter++; |
| 172 | var trackLoadStarted = false; |
| 173 | var redrawBase = 100; |
| 174 | gTrackStore.getListStepped(function(aTPoint) { |
| 175 | if (aTPoint) { |
| 176 | // Add in front and return new length. |
| 177 | var tracklen = gTrack.unshift(aTPoint); |
| 178 | // Redraw track periodically, larger distance the longer it gets. |
| 179 | // Initial paint will do initial track drawing. |
| 180 | if (tracklen % redrawBase == 0) { |
| 181 | drawTrack(); |
| 182 | redrawBase = tracklen; |
| 183 | } |
| 184 | } |
| 185 | else { |
| 186 | // Last point received. |
| 187 | drawTrack(); |
| 188 | } |
| 189 | if (!trackLoadStarted) { |
| 190 | // We have the most recent point, if present, rest will load async. |
| 191 | trackLoadStarted = true; |
| 192 | gWaitCounter--; |
| 193 | var throwEv = new CustomEvent("prefs-step"); |
| 194 | gAction.dispatchEvent(throwEv); |
| 195 | } |
| 196 | }); |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | var gMap = { |
| 201 | gl: null, |
| 202 | glShaderProgram: null, |
| 203 | glVertexPositionAttr: null, |
| 204 | glTextureCoordAttr: null, |
| 205 | glResolutionAttr: null, |
| 206 | glMapTexture: null, |
| 207 | glTextures: {}, |
| 208 | glTxCleanIntervalID: null, |
| 209 | glTexturesPerZoomLevel: 0, |
| 210 | |
| 211 | activeMap: "osm_mapnik", |
| 212 | tileSize: 256, |
| 213 | maxZoom: 18, // The minimum is 0. |
| 214 | zoomFactor: null, |
| 215 | pos: { |
| 216 | x: 35630000.0, // Current position in the map in pixels at the maximum zoom level (18) |
| 217 | y: 23670000.0, // The range is 0-67108864 (2^gMap.maxZoom * gMap.tileSize) |
| 218 | z: 5 // This could be fractional if supported being between zoom levels. |
| 219 | }, |
| 220 | baseDim: { // Map width, height and tile size in level 18 pixels. |
| 221 | wid: null, |
| 222 | ht: null, |
| 223 | tsize: null, |
| 224 | }, |
| 225 | |
| 226 | get width() { return gMap.gl ? gMap.gl.drawingBufferWidth : gGLMapCanvas.width; }, |
| 227 | get height() { return gMap.gl ? gMap.gl.drawingBufferHeight : gGLMapCanvas.height; }, |
| 228 | |
| 229 | getVertShaderSource: function() { |
| 230 | return 'attribute vec2 aVertexPosition;\n' + |
| 231 | 'attribute vec2 aTextureCoord;\n\n' + |
| 232 | 'uniform vec2 uResolution;\n\n' + |
| 233 | 'varying highp vec2 vTextureCoord;\n\n' + |
| 234 | 'void main(void) {\n' + |
| 235 | // convert the rectangle from pixels to -1.0 to +1.0 (clipspace) 0.0 to 1.0 |
| 236 | ' vec2 clipSpace = aVertexPosition * 2.0 / uResolution - 1.0;\n' + |
| 237 | ' gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);\n' + |
| 238 | ' vTextureCoord = aTextureCoord;\n' + |
| 239 | '}'; }, |
| 240 | getFragShaderSource: function() { |
| 241 | return 'varying highp vec2 vTextureCoord;\n\n' + |
| 242 | 'uniform sampler2D uImage;\n\n' + |
| 243 | 'void main(void) {\n' + |
| 244 | ' gl_FragColor = texture2D(uImage, vTextureCoord);\n' + |
| 245 | '}'; }, |
| 246 | |
| 247 | initGL: function() { |
| 248 | // When called from the event listener, the "this" reference doesn't work, so use the object name. |
| 249 | console.log("Initializing WebGL..."); |
| 250 | if (gMap.gl) { |
| 251 | gMap.gl.viewport(0, 0, gMap.gl.drawingBufferWidth, gMap.gl.drawingBufferHeight); |
| 252 | gMap.gl.clearColor(0.0, 0.0, 0.0, 0.5); // Set clear color to black, fully opaque. |
| 253 | gMap.gl.clear(gMap.gl.COLOR_BUFFER_BIT|gMap.gl.DEPTH_BUFFER_BIT); // Clear the color. |
| 254 | |
| 255 | // Create and initialize the shaders. |
| 256 | console.log("Create and compile shaders..."); |
| 257 | var vertShader = gMap.gl.createShader(gMap.gl.VERTEX_SHADER); |
| 258 | var fragShader = gMap.gl.createShader(gMap.gl.FRAGMENT_SHADER); |
| 259 | gMap.gl.shaderSource(vertShader, gMap.getVertShaderSource()); |
| 260 | // Compile the shader program. |
| 261 | gMap.gl.compileShader(vertShader); |
| 262 | // See if it compiled successfully. |
| 263 | if (!gMap.gl.getShaderParameter(vertShader, gMap.gl.COMPILE_STATUS)) { |
| 264 | console.log("An error occurred compiling the vertex shader: " + gMap.gl.getShaderInfoLog(vertShader)); |
| 265 | return null; |
| 266 | } |
| 267 | gMap.gl.shaderSource(fragShader, gMap.getFragShaderSource()); |
| 268 | // Compile the shader program. |
| 269 | gMap.gl.compileShader(fragShader); |
| 270 | // See if it compiled successfully. |
| 271 | if (!gMap.gl.getShaderParameter(fragShader, gMap.gl.COMPILE_STATUS)) { |
| 272 | console.log("An error occurred compiling the fragment shader: " + gMap.gl.getShaderInfoLog(fragShader)); |
| 273 | return null; |
| 274 | } |
| 275 | |
| 276 | console.log("Create and link shader program..."); |
| 277 | gMap.glShaderProgram = gMap.gl.createProgram(); |
| 278 | gMap.gl.attachShader(gMap.glShaderProgram, vertShader); |
| 279 | gMap.gl.attachShader(gMap.glShaderProgram, fragShader); |
| 280 | gMap.gl.linkProgram(gMap.glShaderProgram); |
| 281 | // If creating the shader program failed, alert |
| 282 | if (!gMap.gl.getProgramParameter(gMap.glShaderProgram, gMap.gl.LINK_STATUS)) { |
| 283 | alert("Unable to initialize the shader program."); |
| 284 | } |
| 285 | gMap.gl.useProgram(gMap.glShaderProgram); |
| 286 | // Get locations of the attributes. |
| 287 | gMap.glVertexPositionAttr = gMap.gl.getAttribLocation(gMap.glShaderProgram, "aVertexPosition"); |
| 288 | gMap.glTextureCoordAttr = gMap.gl.getAttribLocation(gMap.glShaderProgram, "aTextureCoord"); |
| 289 | gMap.glResolutionAttr = gMap.gl.getUniformLocation(gMap.glShaderProgram, "uResolution"); |
| 290 | |
| 291 | console.log("Set up vertex buffer..."); |
| 292 | var tileVerticesBuffer = gMap.gl.createBuffer(); |
| 293 | gMap.gl.bindBuffer(gMap.gl.ARRAY_BUFFER, tileVerticesBuffer); |
| 294 | // The vertices are the coordinates of the corner points of the square. |
| 295 | var vertices = [ |
| 296 | 0.0, 0.0, |
| 297 | 1.0, 0.0, |
| 298 | 0.0, 1.0, |
| 299 | 0.0, 1.0, |
| 300 | 1.0, 0.0, |
| 301 | 1.0, 1.0, |
| 302 | ]; |
| 303 | gMap.gl.bufferData(gMap.gl.ARRAY_BUFFER, new Float32Array(vertices), gMap.gl.STATIC_DRAW); |
| 304 | gMap.gl.enableVertexAttribArray(gMap.glTextureCoordAttr); |
| 305 | gMap.gl.vertexAttribPointer(gMap.glTextureCoordAttr, 2, gMap.gl.FLOAT, false, 0, 0); |
| 306 | |
| 307 | gMap.loadImageToTexture(gLoadingTile, getTileKey("loading", {x: 0, y: 0, z: 0})); |
| 308 | |
| 309 | gMap.gl.uniform2f(gMap.glResolutionAttr, gGLMapCanvas.width, gGLMapCanvas.height); |
| 310 | |
| 311 | // Create a buffer for the position of the rectangle corners. |
| 312 | console.log("Set up coord buffer..."); |
| 313 | var mapVerticesTextureCoordBuffer = gMap.gl.createBuffer(); |
| 314 | gMap.gl.bindBuffer(gMap.gl.ARRAY_BUFFER, mapVerticesTextureCoordBuffer); |
| 315 | gMap.gl.enableVertexAttribArray(gMap.glVertexPositionAttr); |
| 316 | gMap.gl.vertexAttribPointer(gMap.glVertexPositionAttr, 2, gMap.gl.FLOAT, false, 0, 0); |
| 317 | |
| 318 | // Call texture cleaning every 30 seconds, for now (is 60 better?). |
| 319 | gMap.glTxCleanIntervalID = window.setInterval(gMap.cleanTextures, 30 * 1000); |
| 320 | } |
| 321 | |
| 322 | var throwEv = new CustomEvent("mapinit-done"); |
| 323 | gAction.dispatchEvent(throwEv); |
| 324 | }, |
| 325 | |
| 326 | draw: function() { |
| 327 | gMap.assembleGL(); |
| 328 | drawTrack(); |
| 329 | }, |
| 330 | |
| 331 | assembleGL: function() { |
| 332 | if (!gMap.gl) { return; } |
| 333 | |
| 334 | document.getElementById("zoomLevel").textContent = gMap.pos.z; |
| 335 | gMap.zoomFactor = Math.pow(2, gMap.maxZoom - gMap.pos.z); |
| 336 | gMap.baseDim.wid = gMap.gl.drawingBufferWidth * gMap.zoomFactor; |
| 337 | gMap.baseDim.ht = gMap.gl.drawingBufferHeight * gMap.zoomFactor; |
| 338 | gMap.baseDim.tsize = gMap.tileSize * gMap.zoomFactor; |
| 339 | |
| 340 | var xMin = gMap.pos.x - gMap.baseDim.wid / 2; // Corners of the window in level 18 pixels. |
| 341 | var yMin = gMap.pos.y - gMap.baseDim.ht / 2; |
| 342 | var xMax = gMap.pos.x + gMap.baseDim.wid / 2; |
| 343 | var yMax = gMap.pos.y + gMap.baseDim.ht / 2; |
| 344 | |
| 345 | if (gMapPrefsLoaded && mainDB) |
| 346 | gPrefs.set("position", gMap.pos); |
| 347 | |
| 348 | // Go through all the tiles in the map, find out if to draw them and do so. |
| 349 | for (var x = Math.floor(xMin / gMap.baseDim.tsize); x < Math.ceil(xMax / gMap.baseDim.tsize); x++) { |
| 350 | for (var y = Math.floor(yMin / gMap.baseDim.tsize); y < Math.ceil(yMax / gMap.baseDim.tsize); y++) { |
| 351 | // Only go to loading step if we haven't loaded the texture. |
| 352 | var coords = {x: x, y: y, z: gMap.pos.z}; |
| 353 | var tileKey = getTileKey(gMap.activeMap, normalizeCoords(coords)); |
| 354 | if (!gMap.glTextures[tileKey]) { |
| 355 | // Initiate loading/drawing of the actual tile. |
| 356 | gTileService.get(gMap.activeMap, coords, |
| 357 | function(aImage, aStyle, aCoords, aTileKey) { |
| 358 | // Only actually load if this still applies for the current view. |
| 359 | if ((aStyle == gMap.activeMap) && (aCoords.z == gMap.pos.z)) { |
| 360 | var URL = window.URL; |
| 361 | var imgURL = URL.createObjectURL(aImage); |
| 362 | var imgObj = new Image(); |
| 363 | imgObj.onload = function() { |
| 364 | gMap.loadImageToTexture(imgObj, aTileKey); |
| 365 | window.requestAnimationFrame(function(aTimestamp) { gMap.drawGL() }); |
| 366 | URL.revokeObjectURL(imgURL); |
| 367 | } |
| 368 | imgObj.src = imgURL; |
| 369 | } |
| 370 | }); |
| 371 | } |
| 372 | } |
| 373 | } |
| 374 | window.requestAnimationFrame(function(aTimestamp) { gMap.drawGL() }); |
| 375 | }, |
| 376 | |
| 377 | drawGL: function() { |
| 378 | var xMin = gMap.pos.x - gMap.baseDim.wid / 2; // Corners of the window in level 18 pixels. |
| 379 | var yMin = gMap.pos.y - gMap.baseDim.ht / 2; |
| 380 | var xMax = gMap.pos.x + gMap.baseDim.wid / 2; |
| 381 | var yMax = gMap.pos.y + gMap.baseDim.ht / 2; |
| 382 | |
| 383 | // Go through all the tiles in the map, find out if to draw them and do so. |
| 384 | for (var x = Math.floor(xMin / gMap.baseDim.tsize); x < Math.ceil(xMax / gMap.baseDim.tsize); x++) { |
| 385 | for (var y = Math.floor(yMin / gMap.baseDim.tsize); y < Math.ceil(yMax / gMap.baseDim.tsize); y++) { |
| 386 | // Rounding the pixel offsets ensures we position the tiles precisely. |
| 387 | var xoff = Math.round((x * gMap.baseDim.tsize - xMin) / gMap.zoomFactor); |
| 388 | var yoff = Math.round((y * gMap.baseDim.tsize - yMin) / gMap.zoomFactor); |
| 389 | // Draw the tile, first find out the actual texture to use. |
| 390 | var norm = normalizeCoords({x: x, y: y, z: gMap.pos.z}); |
| 391 | var tileKey = getTileKey(gMap.activeMap, norm); |
| 392 | if (!gMap.glTextures[tileKey]) { |
| 393 | tileKey = getTileKey("loading", {x: 0, y: 0, z: 0}); |
| 394 | } |
| 395 | gMap.drawTileGL(xoff, yoff, tileKey); |
| 396 | } |
| 397 | } |
| 398 | }, |
| 399 | |
| 400 | resizeAndDraw: function() { |
| 401 | var viewportWidth = Math.min(window.innerWidth, window.outerWidth); |
| 402 | var viewportHeight = Math.min(window.innerHeight, window.outerHeight); |
| 403 | if (gGLMapCanvas && gTrackCanvas) { |
| 404 | gGLMapCanvas.width = viewportWidth; |
| 405 | gGLMapCanvas.height = viewportHeight; |
| 406 | gTrackCanvas.width = viewportWidth; |
| 407 | gTrackCanvas.height = viewportHeight; |
| 408 | if (gMap.gl) { |
| 409 | // Size viewport to canvas size. |
| 410 | gMap.gl.viewport(0, 0, gMap.gl.drawingBufferWidth, gMap.gl.drawingBufferHeight); |
| 411 | // Clear the color. |
| 412 | gMap.gl.clear(gMap.gl.COLOR_BUFFER_BIT); |
| 413 | // Make sure the vertex shader get the right resolution. |
| 414 | gMap.gl.uniform2f(gMap.glResolutionAttr, gGLMapCanvas.width, gGLMapCanvas.height); |
| 415 | // Prepare recalculation of textures to keep for one zoom level. |
| 416 | gMap.glTexturesPerZoomLevel = 0; |
| 417 | } |
| 418 | gMap.draw(); |
| 419 | showUI(); |
| 420 | } |
| 421 | }, |
| 422 | |
| 423 | drawTileGL: function(aLeft, aRight, aTileKey) { |
| 424 | gMap.gl.activeTexture(gMap.gl.TEXTURE0); |
| 425 | gMap.gl.bindTexture(gMap.gl.TEXTURE_2D, gMap.glTextures[aTileKey]); |
| 426 | // Set uImage to refer to TEXTURE0 |
| 427 | gMap.gl.uniform1i(gMap.gl.getUniformLocation(gMap.glShaderProgram, "uImage"), 0); |
| 428 | var x_start = aLeft; |
| 429 | var i_width = gMap.tileSize; |
| 430 | var y_start = aRight; |
| 431 | var i_height = gMap.tileSize; |
| 432 | var textureCoordinates = [ |
| 433 | x_start, y_start, |
| 434 | x_start + i_width, y_start, |
| 435 | x_start, y_start + i_height, |
| 436 | x_start, y_start + i_height, |
| 437 | x_start + i_width, y_start, |
| 438 | x_start + i_width, y_start + i_height, |
| 439 | ]; |
| 440 | gMap.gl.bufferData(gMap.gl.ARRAY_BUFFER, new Float32Array(textureCoordinates), gMap.gl.STATIC_DRAW); |
| 441 | |
| 442 | // There are 6 indices in textureCoordinates. |
| 443 | gMap.gl.drawArrays(gMap.gl.TRIANGLES, 0, 6); |
| 444 | }, |
| 445 | |
| 446 | loadImageToTexture: function(aImage, aTileKey) { |
| 447 | // Create and bind texture. |
| 448 | gMap.glTextures[aTileKey] = gMap.gl.createTexture(); |
| 449 | gMap.gl.bindTexture(gMap.gl.TEXTURE_2D, gMap.glTextures[aTileKey]); |
| 450 | // Set params for how the texture minifies and magnifies (wrap params are not needed as we're power-of-two). |
| 451 | gMap.gl.texParameteri(gMap.gl.TEXTURE_2D, gMap.gl.TEXTURE_MIN_FILTER, gMap.gl.NEAREST); |
| 452 | gMap.gl.texParameteri(gMap.gl.TEXTURE_2D, gMap.gl.TEXTURE_MAG_FILTER, gMap.gl.NEAREST); |
| 453 | // Upload the image into the texture. |
| 454 | gMap.gl.texImage2D(gMap.gl.TEXTURE_2D, 0, gMap.gl.RGBA, gMap.gl.RGBA, gMap.gl.UNSIGNED_BYTE, aImage); |
| 455 | }, |
| 456 | |
| 457 | cleanTextures: function() { |
| 458 | // Get rid of unneeded textures to save memory. |
| 459 | // TODO: Be less aggressive, maybe keep neighboring zoom levels (but x/y coords there are zoom-specific). |
| 460 | if (!gMap.glTexturesPerZoomLevel) { |
| 461 | // Calculate how many textures we need to keep for one zoom level. |
| 462 | // ceil(width/size) gives us the minimum, keep one on either side as well. |
| 463 | gMap.glTexturesPerZoomLevel = |
| 464 | Math.ceil(gMap.gl.drawingBufferWidth / gMap.tileSize + 2) * |
| 465 | Math.ceil(gMap.gl.drawingBufferHeight / gMap.tileSize + 2); |
| 466 | console.log("Keeping " + gMap.glTexturesPerZoomLevel + " textures per level"); |
| 467 | } |
| 468 | if (Object.keys(gMap.glTextures).length > gMap.glTexturesPerZoomLevel) { |
| 469 | console.log("Cleaning textures... (have " + Object.keys(gMap.glTextures).length + " atm)"); |
| 470 | |
| 471 | // Find coordinate ranges for tiles to keep. |
| 472 | var tMin = normalizeCoords({x: Math.floor((gMap.pos.x - gMap.baseDim.wid / 2) / gMap.baseDim.tsize) - 1, |
| 473 | y: Math.floor((gMap.pos.y - gMap.baseDim.ht / 2) / gMap.baseDim.tsize) - 1, |
| 474 | z: gMap.pos.z}); |
| 475 | var tMax = normalizeCoords({x: Math.ceil((gMap.pos.x + gMap.baseDim.wid / 2) / gMap.baseDim.tsize) + 1, |
| 476 | y: Math.ceil((gMap.pos.y + gMap.baseDim.ht / 2) / gMap.baseDim.tsize) + 1, |
| 477 | z: gMap.pos.z}); |
| 478 | console.log("In range: " + tMin.x + "," + tMin.y + "," + tMin.z + " - " + tMax.x + "," + tMax.y + "," + tMax.z); |
| 479 | for (aTileKey in gMap.glTextures) { |
| 480 | var keyMatches = aTileKey.match(/([^:]+)::(\d+),(\d+),(\d+)/); |
| 481 | if (keyMatches && keyMatches[1] != "loading") { |
| 482 | var txData = { |
| 483 | style: keyMatches[1], |
| 484 | x: keyMatches[2], |
| 485 | y: keyMatches[3], |
| 486 | z: keyMatches[4], |
| 487 | } |
| 488 | var delTx = false; |
| 489 | if (txData.style != gMap.activeMap) { delTx = true; console.log("Different map style: " + txData.style); } |
| 490 | if (!delTx && (txData.z < tMin.z || txData.z > tMax.z)) { delTx = true; console.log("Out-of-range zoom: " + txData.z); } |
| 491 | if (tMin.x < tMax.x) { |
| 492 | if (!delTx && (txData.x < tMin.x || txData.x > tMax.x)) { delTx = true; console.log("Out-of-range X: " + txData.x); } |
| 493 | } |
| 494 | else { |
| 495 | // We are crossing over the 0 coordinate! |
| 496 | if (!delTx && (txData.x < tMin.x && txData.x > tMax.x)) { delTx = true; console.log("Out-of-range X: " + txData.x); } |
| 497 | } |
| 498 | if (tMin.y < tMax.y) { |
| 499 | if (!delTx && (txData.y < tMin.y || txData.y > tMax.y)) { delTx = true; console.log("Out-of-range Y: " + txData.y); } |
| 500 | } |
| 501 | else { |
| 502 | // We are crossing over the 0 coordinate! |
| 503 | if (!delTx && (txData.y < tMin.y && txData.y > tMax.y)) { delTx = true; console.log("Out-of-range Y: " + txData.y); } |
| 504 | } |
| 505 | if (delTx) { |
| 506 | // Delete texture from GL and from the array we are holding. |
| 507 | gMap.gl.deleteTexture(gMap.glTextures[aTileKey]); |
| 508 | delete gMap.glTextures[aTileKey]; |
| 509 | } |
| 510 | } |
| 511 | } |
| 512 | console.log("Cleaning complete, " + Object.keys(gMap.glTextures).length + " textures left)"); |
| 513 | //clearInterval(gMap.glTxCleanIntervalID); |
| 514 | } |
| 515 | }, |
| 516 | } |
| 517 | |
| 518 | // Using scale(x, y) together with drawing old data on scaled canvas would be an improvement for zooming. |
| 519 | // See https://developer.mozilla.org/en-US/docs/Canvas_tutorial/Transformations#Scaling |
| 520 | |
| 521 | function zoomIn() { |
| 522 | if (gMap.pos.z < gMap.maxZoom) { |
| 523 | gMap.pos.z++; |
| 524 | gMap.draw(); |
| 525 | } |
| 526 | } |
| 527 | |
| 528 | function zoomOut() { |
| 529 | if (gMap.pos.z > 0) { |
| 530 | gMap.pos.z--; |
| 531 | gMap.draw(); |
| 532 | } |
| 533 | } |
| 534 | |
| 535 | function zoomTo(aTargetLevel) { |
| 536 | aTargetLevel = parseInt(aTargetLevel); |
| 537 | if (aTargetLevel >= 0 && aTargetLevel <= gMap.maxZoom) { |
| 538 | gMap.pos.z = aTargetLevel; |
| 539 | gMap.draw(); |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | function gps2xy(aLatitude, aLongitude) { |
| 544 | var maxZoomFactor = Math.pow(2, gMap.maxZoom) * gMap.tileSize; |
| 545 | var convLat = aLatitude * Math.PI / 180; |
| 546 | var rawY = (1 - Math.log(Math.tan(convLat) + |
| 547 | 1 / Math.cos(convLat)) / Math.PI) / 2 * maxZoomFactor; |
| 548 | var rawX = (aLongitude + 180) / 360 * maxZoomFactor; |
| 549 | return {x: Math.round(rawX), |
| 550 | y: Math.round(rawY)}; |
| 551 | } |
| 552 | |
| 553 | function xy2gps(aX, aY) { |
| 554 | var maxZoomFactor = Math.pow(2, gMap.maxZoom) * gMap.tileSize; |
| 555 | var n = Math.PI - 2 * Math.PI * aY / maxZoomFactor; |
| 556 | return {latitude: 180 / Math.PI * |
| 557 | Math.atan(0.5 * (Math.exp(n) - Math.exp(-n))), |
| 558 | longitude: aX / maxZoomFactor * 360 - 180}; |
| 559 | } |
| 560 | |
| 561 | function setMapStyle() { |
| 562 | var mapSel = document.getElementById("mapSelector"); |
| 563 | if (mapSel.selectedIndex >= 0 && gMap.activeMap != mapSel.value) { |
| 564 | gMap.activeMap = mapSel.value; |
| 565 | document.getElementById("copyright").innerHTML = |
| 566 | gMapStyles[gMap.activeMap].copyright; |
| 567 | showUI(); |
| 568 | gMap.draw(); |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | // A sane mod function that works for negative numbers. |
| 573 | // Returns a % b. |
| 574 | function mod(a, b) { |
| 575 | return ((a % b) + b) % b; |
| 576 | } |
| 577 | |
| 578 | function normalizeCoords(aCoords) { |
| 579 | var zoomFactor = Math.pow(2, aCoords.z); |
| 580 | return {x: mod(aCoords.x, zoomFactor), |
| 581 | y: mod(aCoords.y, zoomFactor), |
| 582 | z: aCoords.z}; |
| 583 | } |
| 584 | |
| 585 | function getTileKey(aStyle, aNormalizedCoords) { |
| 586 | return aStyle + "::" + |
| 587 | aNormalizedCoords.x + "," + |
| 588 | aNormalizedCoords.y + "," + |
| 589 | aNormalizedCoords.z; |
| 590 | } |
| 591 | |
| 592 | // Returns true if the tile is outside the current view. |
| 593 | function isOutsideWindow(t) { |
| 594 | var pos = decodeIndex(t); |
| 595 | |
| 596 | var zoomFactor = Math.pow(2, gMap.maxZoom - pos.z); |
| 597 | var wid = gMap.width * zoomFactor; |
| 598 | var ht = gMap.height * zoomFactor; |
| 599 | |
| 600 | pos.x *= zoomFactor; |
| 601 | pos.y *= zoomFactor; |
| 602 | |
| 603 | var sz = gMap.tileSize * zoomFactor; |
| 604 | if (pos.x > gMap.pos.x + wid / 2 || pos.y > gMap.pos.y + ht / 2 || |
| 605 | pos.x + sz < gMap.pos.x - wid / 2 || pos.y - sz < gMap.pos.y - ht / 2) |
| 606 | return true; |
| 607 | return false; |
| 608 | } |
| 609 | |
| 610 | function encodeIndex(x, y, z) { |
| 611 | var norm = normalizeCoords({x: x, y: y, z: z}); |
| 612 | return norm.x + "," + norm.y + "," + norm.z; |
| 613 | } |
| 614 | |
| 615 | function decodeIndex(encodedIdx) { |
| 616 | var ind = encodedIdx.split(",", 3); |
| 617 | return {x: ind[0], y: ind[1], z: ind[2]}; |
| 618 | } |
| 619 | |
| 620 | function drawTrack() { |
| 621 | gLastDrawnPoint = null; |
| 622 | gCurPosMapCache = undefined; |
| 623 | gTrackContext.clearRect(0, 0, gTrackCanvas.width, gTrackCanvas.height); |
| 624 | if (gTrack.length) { |
| 625 | for (var i = 0; i < gTrack.length; i++) { |
| 626 | drawTrackPoint(gTrack[i].coords.latitude, gTrack[i].coords.longitude, |
| 627 | (i + 1 >= gTrack.length)); |
| 628 | } |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | function drawTrackPoint(aLatitude, aLongitude, lastPoint) { |
| 633 | var trackpoint = gps2xy(aLatitude, aLongitude); |
| 634 | // lastPoint is for optimizing (not actually executing the draw until the last) |
| 635 | trackpoint.optimized = (lastPoint === false); |
| 636 | var mappos = {x: Math.round((trackpoint.x - gMap.pos.x) / gMap.zoomFactor + gMap.width / 2), |
| 637 | y: Math.round((trackpoint.y - gMap.pos.y) / gMap.zoomFactor + gMap.height / 2)}; |
| 638 | |
| 639 | if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) { |
| 640 | gTrackContext.strokeStyle = gTrackColor; |
| 641 | gTrackContext.fillStyle = gTrackContext.strokeStyle; |
| 642 | gTrackContext.lineWidth = gTrackWidth; |
| 643 | gTrackContext.lineCap = "round"; |
| 644 | gTrackContext.lineJoin = "round"; |
| 645 | } |
| 646 | if (!gLastDrawnPoint || gLastDrawnPoint == trackpoint) { |
| 647 | // This breaks optimiziation, so make sure to close path and reset optimization. |
| 648 | if (gLastDrawnPoint && gLastDrawnPoint.optimized) |
| 649 | gTrackContext.stroke(); |
| 650 | gTrackContext.beginPath(); |
| 651 | trackpoint.optimized = false; |
| 652 | gTrackContext.arc(mappos.x, mappos.y, |
| 653 | gTrackContext.lineWidth, 0, Math.PI * 2, false); |
| 654 | gTrackContext.fill(); |
| 655 | } |
| 656 | else { |
| 657 | if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) { |
| 658 | gTrackContext.beginPath(); |
| 659 | gTrackContext.moveTo(Math.round((gLastDrawnPoint.x - gMap.pos.x) / gMap.zoomFactor + gMap.width / 2), |
| 660 | Math.round((gLastDrawnPoint.y - gMap.pos.y) / gMap.zoomFactor + gMap.height / 2)); |
| 661 | } |
| 662 | gTrackContext.lineTo(mappos.x, mappos.y); |
| 663 | if (!trackpoint.optimized) |
| 664 | gTrackContext.stroke(); |
| 665 | } |
| 666 | gLastDrawnPoint = trackpoint; |
| 667 | } |
| 668 | |
| 669 | function drawCurrentLocation(trackPoint) { |
| 670 | var locpoint = gps2xy(trackPoint.coords.latitude, trackPoint.coords.longitude); |
| 671 | var circleRadius = Math.round(gCurLocSize / 2); |
| 672 | var mappos = {x: Math.round((locpoint.x - gMap.pos.x) / gMap.zoomFactor + gMap.width / 2), |
| 673 | y: Math.round((locpoint.y - gMap.pos.y) / gMap.zoomFactor + gMap.height / 2)}; |
| 674 | |
| 675 | undrawCurrentLocation(); |
| 676 | |
| 677 | // Cache overdrawn area. |
| 678 | gCurPosMapCache = |
| 679 | {point: locpoint, |
| 680 | radius: circleRadius, |
| 681 | data: gTrackContext.getImageData(mappos.x - circleRadius, |
| 682 | mappos.y - circleRadius, |
| 683 | circleRadius * 2, circleRadius * 2)}; |
| 684 | |
| 685 | gTrackContext.strokeStyle = gCurLocColor; |
| 686 | gTrackContext.fillStyle = gTrackContext.strokeStyle; |
| 687 | gTrackContext.beginPath(); |
| 688 | gTrackContext.arc(mappos.x, mappos.y, |
| 689 | circleRadius, 0, Math.PI * 2, false); |
| 690 | gTrackContext.fill(); |
| 691 | } |
| 692 | |
| 693 | function undrawCurrentLocation() { |
| 694 | if (gCurPosMapCache) { |
| 695 | var oldpoint = gCurPosMapCache.point; |
| 696 | var oldmp = {x: Math.round((oldpoint.x - gMap.pos.x) / gMap.zoomFactor + gMap.width / 2), |
| 697 | y: Math.round((oldpoint.y - gMap.pos.y) / gMap.zoomFactor + gMap.height / 2)}; |
| 698 | gTrackContext.putImageData(gCurPosMapCache.data, |
| 699 | oldmp.x - gCurPosMapCache.radius, |
| 700 | oldmp.y - gCurPosMapCache.radius); |
| 701 | gCurPosMapCache = undefined; |
| 702 | } |
| 703 | } |
| 704 | |
| 705 | var mapEvHandler = { |
| 706 | handleEvent: function(aEvent) { |
| 707 | var touchEvent = aEvent.type.indexOf('touch') != -1; |
| 708 | |
| 709 | if (touchEvent) { |
| 710 | aEvent.stopPropagation(); |
| 711 | } |
| 712 | |
| 713 | // Bail out if the event is happening on an input. |
| 714 | if (aEvent.target.tagName.toLowerCase() == "input") |
| 715 | return; |
| 716 | |
| 717 | // Bail out on unwanted map moves, but not zoom or keyboard events. |
| 718 | if (aEvent.type.indexOf("mouse") === 0 || aEvent.type.indexOf("touch") === 0) { |
| 719 | // Bail out if this is neither a touch nor left-click. |
| 720 | if (!touchEvent && aEvent.button != 0) |
| 721 | return; |
| 722 | |
| 723 | // Bail out if the started touch can't be found. |
| 724 | if (touchEvent && gDragging && |
| 725 | !aEvent.changedTouches.identifiedTouch(gDragTouchID)) |
| 726 | return; |
| 727 | } |
| 728 | |
| 729 | var coordObj = touchEvent ? |
| 730 | aEvent.changedTouches.identifiedTouch(gDragTouchID) : |
| 731 | aEvent; |
| 732 | |
| 733 | switch (aEvent.type) { |
| 734 | case "mousedown": |
| 735 | case "touchstart": |
| 736 | if (touchEvent) { |
| 737 | if (aEvent.targetTouches.length == 2) { |
| 738 | gPinchStartWidth = Math.sqrt( |
| 739 | Math.pow(aEvent.targetTouches.item(1).clientX - |
| 740 | aEvent.targetTouches.item(0).clientX, 2) + |
| 741 | Math.pow(aEvent.targetTouches.item(1).clientY - |
| 742 | aEvent.targetTouches.item(0).clientY, 2) |
| 743 | ); |
| 744 | } |
| 745 | gDragTouchID = aEvent.changedTouches.item(0).identifier; |
| 746 | coordObj = aEvent.changedTouches.identifiedTouch(gDragTouchID); |
| 747 | } |
| 748 | var x = coordObj.clientX - gGLMapCanvas.offsetLeft; |
| 749 | var y = coordObj.clientY - gGLMapCanvas.offsetTop; |
| 750 | |
| 751 | if (touchEvent || aEvent.button === 0) { |
| 752 | gDragging = true; |
| 753 | } |
| 754 | gLastMouseX = x; |
| 755 | gLastMouseY = y; |
| 756 | showUI(); |
| 757 | break; |
| 758 | case "mousemove": |
| 759 | case "touchmove": |
| 760 | if (touchEvent && aEvent.targetTouches.length == 2) { |
| 761 | curPinchStartWidth = Math.sqrt( |
| 762 | Math.pow(aEvent.targetTouches.item(1).clientX - |
| 763 | aEvent.targetTouches.item(0).clientX, 2) + |
| 764 | Math.pow(aEvent.targetTouches.item(1).clientY - |
| 765 | aEvent.targetTouches.item(0).clientY, 2) |
| 766 | ); |
| 767 | if (!gPinchStartWidth) |
| 768 | gPinchStartWidth = curPinchStartWidth; |
| 769 | |
| 770 | if (gPinchStartWidth / curPinchStartWidth > 1.7 || |
| 771 | gPinchStartWidth / curPinchStartWidth < 0.6) { |
| 772 | var newZoomLevel = gMap.pos.z + (gPinchStartWidth < curPinchStartWidth ? 1 : -1); |
| 773 | if ((newZoomLevel >= 0) && (newZoomLevel <= gMap.maxZoom)) { |
| 774 | // Calculate new center of the map - preserve middle of pinch. |
| 775 | // This means that pixel distance between old center and middle |
| 776 | // must equal pixel distance of new center and middle. |
| 777 | var x = (aEvent.targetTouches.item(1).clientX + |
| 778 | aEvent.targetTouches.item(0).clientX) / 2 - |
| 779 | gGLMapCanvas.offsetLeft; |
| 780 | var y = (aEvent.targetTouches.item(1).clientY + |
| 781 | aEvent.targetTouches.item(0).clientY) / 2 - |
| 782 | gGLMapCanvas.offsetTop; |
| 783 | |
| 784 | // Zoom factor after this action. |
| 785 | var newZoomFactor = Math.pow(2, gMap.maxZoom - newZoomLevel); |
| 786 | gMap.pos.x -= (x - gMap.width / 2) * (newZoomFactor - gMap.zoomFactor); |
| 787 | gMap.pos.y -= (y - gMap.height / 2) * (newZoomFactor - gMap.zoomFactor); |
| 788 | |
| 789 | if (gPinchStartWidth < curPinchStartWidth) |
| 790 | zoomIn(); |
| 791 | else |
| 792 | zoomOut(); |
| 793 | |
| 794 | // Reset pinch start width and start another pinch gesture. |
| 795 | gPinchStartWidth = null; |
| 796 | } |
| 797 | } |
| 798 | // If we are in a pinch, do not drag. |
| 799 | break; |
| 800 | } |
| 801 | var x = coordObj.clientX - gGLMapCanvas.offsetLeft; |
| 802 | var y = coordObj.clientY - gGLMapCanvas.offsetTop; |
| 803 | if (gDragging === true) { |
| 804 | var dX = x - gLastMouseX; |
| 805 | var dY = y - gLastMouseY; |
| 806 | gMap.pos.x -= dX * gMap.zoomFactor; |
| 807 | gMap.pos.y -= dY * gMap.zoomFactor; |
| 808 | gMap.draw(); |
| 809 | showUI(); |
| 810 | } |
| 811 | gLastMouseX = x; |
| 812 | gLastMouseY = y; |
| 813 | break; |
| 814 | case "mouseup": |
| 815 | case "touchend": |
| 816 | gPinchStartWidth = null; |
| 817 | gDragging = false; |
| 818 | showUI(); |
| 819 | break; |
| 820 | case "mouseout": |
| 821 | case "touchcancel": |
| 822 | case "touchleave": |
| 823 | //gDragging = false; |
| 824 | break; |
| 825 | case "wheel": |
| 826 | // If we'd want pixels, we'd need to calc up using aEvent.deltaMode. |
| 827 | // See https://developer.mozilla.org/en-US/docs/Mozilla_event_reference/wheel |
| 828 | |
| 829 | // Only accept (non-null) deltaY values |
| 830 | if (!aEvent.deltaY) |
| 831 | break; |
| 832 | |
| 833 | // Debug output: "coordinates" of the point the mouse was over. |
| 834 | /* |
| 835 | var ptCoord = {x: gMap.pos.x + (x - gMap.width / 2) * gMap.zoomFactor, |
| 836 | y: gMap.pos.y + (x - gMap.height / 2) * gMap.zoomFactor}; |
| 837 | var gpsCoord = xy2gps(ptCoord.x, ptCoord.y); |
| 838 | var pt2Coord = gps2xy(gpsCoord.latitude, gpsCoord.longitude); |
| 839 | console.log(ptCoord.x + "/" + ptCoord.y + " - " + |
| 840 | gpsCoord.latitude + "/" + gpsCoord.longitude + " - " + |
| 841 | pt2Coord.x + "/" + pt2Coord.y); |
| 842 | */ |
| 843 | |
| 844 | var newZoomLevel = gMap.pos.z + (aEvent.deltaY < 0 ? 1 : -1); |
| 845 | if ((newZoomLevel >= 0) && (newZoomLevel <= gMap.maxZoom)) { |
| 846 | // Calculate new center of the map - same point stays under the mouse. |
| 847 | // This means that the pixel distance between the old center and point |
| 848 | // must equal the pixel distance of the new center and that point. |
| 849 | var x = coordObj.clientX - gGLMapCanvas.offsetLeft; |
| 850 | var y = coordObj.clientY - gGLMapCanvas.offsetTop; |
| 851 | |
| 852 | // Zoom factor after this action. |
| 853 | var newZoomFactor = Math.pow(2, gMap.maxZoom - newZoomLevel); |
| 854 | gMap.pos.x -= (x - gMap.width / 2) * (newZoomFactor - gMap.zoomFactor); |
| 855 | gMap.pos.y -= (y - gMap.height / 2) * (newZoomFactor - gMap.zoomFactor); |
| 856 | |
| 857 | if (aEvent.deltaY < 0) |
| 858 | zoomIn(); |
| 859 | else |
| 860 | zoomOut(); |
| 861 | } |
| 862 | break; |
| 863 | case "keydown": |
| 864 | // Allow keyboard control to move and zoom the map. |
| 865 | // Should use aEvent.key instead of aEvent.which but needs bug 680830. |
| 866 | // See https://developer.mozilla.org/en-US/docs/DOM/Mozilla_event_reference/keydown |
| 867 | var dX = 0; |
| 868 | var dY = 0; |
| 869 | switch (aEvent.which) { |
| 870 | case 39: // right |
| 871 | dX = -gMap.tileSize / 2; |
| 872 | break; |
| 873 | case 37: // left |
| 874 | dX = gMap.tileSize / 2; |
| 875 | break; |
| 876 | case 38: // up |
| 877 | dY = gMap.tileSize / 2; |
| 878 | break; |
| 879 | case 40: // down |
| 880 | dY = -gMap.tileSize / 2; |
| 881 | break; |
| 882 | case 87: // w |
| 883 | case 107: // + (numpad) |
| 884 | case 171: // + (normal key) |
| 885 | zoomIn(); |
| 886 | break; |
| 887 | case 83: // s |
| 888 | case 109: // - (numpad) |
| 889 | case 173: // - (normal key) |
| 890 | zoomOut(); |
| 891 | break; |
| 892 | case 48: // 0 |
| 893 | case 49: // 1 |
| 894 | case 50: // 2 |
| 895 | case 51: // 3 |
| 896 | case 52: // 4 |
| 897 | case 53: // 5 |
| 898 | case 54: // 6 |
| 899 | case 55: // 7 |
| 900 | case 56: // 8 |
| 901 | zoomTo(aEvent.which - 38); |
| 902 | break; |
| 903 | case 57: // 9 |
| 904 | zoomTo(9); |
| 905 | break; |
| 906 | case 96: // 0 (numpad) |
| 907 | case 97: // 1 (numpad) |
| 908 | case 98: // 2 (numpad) |
| 909 | case 99: // 3 (numpad) |
| 910 | case 100: // 4 (numpad) |
| 911 | case 101: // 5 (numpad) |
| 912 | case 102: // 6 (numpad) |
| 913 | case 103: // 7 (numpad) |
| 914 | case 104: // 8 (numpad) |
| 915 | zoomTo(aEvent.which - 86); |
| 916 | break; |
| 917 | case 105: // 9 (numpad) |
| 918 | zoomTo(9); |
| 919 | break; |
| 920 | default: // not supported |
| 921 | console.log("key not supported: " + aEvent.which); |
| 922 | break; |
| 923 | } |
| 924 | |
| 925 | // Move if needed. |
| 926 | if (dX || dY) { |
| 927 | gMap.pos.x -= dX * gMap.zoomFactor; |
| 928 | gMap.pos.y -= dY * gMap.zoomFactor; |
| 929 | gMap.draw(); |
| 930 | } |
| 931 | break; |
| 932 | } |
| 933 | } |
| 934 | }; |
| 935 | |
| 936 | var geofake = { |
| 937 | tracking: false, |
| 938 | lastPos: {x: undefined, y: undefined}, |
| 939 | watchPosition: function(aSuccessCallback, aErrorCallback, aPrefObject) { |
| 940 | this.tracking = true; |
| 941 | var watchCall = function() { |
| 942 | // calc new position in lat/lon degrees |
| 943 | // 90° on Earth surface are ~10,000 km at the equator, |
| 944 | // so try moving at most 10m at a time |
| 945 | if (geofake.lastPos.x) |
| 946 | geofake.lastPos.x += (Math.random() - .5) * 90 / 1000000 |
| 947 | else |
| 948 | geofake.lastPos.x = 48.208174 |
| 949 | if (geofake.lastPos.y) |
| 950 | geofake.lastPos.y += (Math.random() - .5) * 90 / 1000000 |
| 951 | else |
| 952 | geofake.lastPos.y = 16.373819 |
| 953 | aSuccessCallback({timestamp: Date.now(), |
| 954 | coords: {latitude: geofake.lastPos.x, |
| 955 | longitude: geofake.lastPos.y, |
| 956 | accuracy: 20}}); |
| 957 | if (geofake.tracking) |
| 958 | setTimeout(watchCall, 1000); |
| 959 | }; |
| 960 | setTimeout(watchCall, 1000); |
| 961 | return "foo"; |
| 962 | }, |
| 963 | clearWatch: function(aID) { |
| 964 | this.tracking = false; |
| 965 | } |
| 966 | } |
| 967 | |
| 968 | function setCentering(aCheckbox) { |
| 969 | if (gMapPrefsLoaded && mainDB) |
| 970 | gPrefs.set("center_map", aCheckbox.checked); |
| 971 | gCenterPosition = aCheckbox.checked; |
| 972 | } |
| 973 | |
| 974 | function setTracking(aCheckbox) { |
| 975 | if (gMapPrefsLoaded && mainDB) |
| 976 | gPrefs.set("tracking_enabled", aCheckbox.checked); |
| 977 | if (aCheckbox.checked) |
| 978 | startTracking(); |
| 979 | else |
| 980 | endTracking(); |
| 981 | } |
| 982 | |
| 983 | function startTracking() { |
| 984 | if (gGeolocation) { |
| 985 | gActionLabel.textContent = "Establishing Position"; |
| 986 | gAction.style.display = "block"; |
| 987 | gGeoWatchID = gGeolocation.watchPosition( |
| 988 | function(position) { |
| 989 | if (gActionLabel.textContent) { |
| 990 | gActionLabel.textContent = ""; |
| 991 | gAction.style.display = "none"; |
| 992 | } |
| 993 | // Coords spec: https://developer.mozilla.org/en/XPCOM_Interface_Reference/NsIDOMGeoPositionCoords |
| 994 | var tPoint = {time: position.timestamp, |
| 995 | coords: {latitude: position.coords.latitude, |
| 996 | longitude: position.coords.longitude, |
| 997 | altitude: position.coords.altitude, |
| 998 | accuracy: position.coords.accuracy, |
| 999 | altitudeAccuracy: position.coords.altitudeAccuracy, |
| 1000 | heading: position.coords.heading, |
| 1001 | speed: position.coords.speed}, |
| 1002 | beginSegment: !gLastTrackPoint}; |
| 1003 | // Only add point to track is accuracy is good enough. |
| 1004 | if (tPoint.coords.accuracy < gMinTrackAccuracy) { |
| 1005 | gLastTrackPoint = tPoint; |
| 1006 | gTrack.push(tPoint); |
| 1007 | try { gTrackStore.push(tPoint); } catch(e) {} |
| 1008 | var redrawn = false; |
| 1009 | if (gCenterPosition) { |
| 1010 | var posCoord = gps2xy(position.coords.latitude, |
| 1011 | position.coords.longitude); |
| 1012 | if (Math.abs(gMap.pos.x - posCoord.x) > gMap.width * gMap.zoomFactor / 4 || |
| 1013 | Math.abs(gMap.pos.y - posCoord.y) > gMap.height * gMap.zoomFactor / 4) { |
| 1014 | gMap.pos.x = posCoord.x; |
| 1015 | gMap.pos.y = posCoord.y; |
| 1016 | gMap.draw(); // This draws the current point as well. |
| 1017 | redrawn = true; |
| 1018 | } |
| 1019 | } |
| 1020 | if (!redrawn) |
| 1021 | undrawCurrentLocation(); |
| 1022 | drawTrackPoint(position.coords.latitude, position.coords.longitude, true); |
| 1023 | } |
| 1024 | drawCurrentLocation(tPoint); |
| 1025 | }, |
| 1026 | function(error) { |
| 1027 | // Ignore erros for the moment, but this is good for debugging. |
| 1028 | // See https://developer.mozilla.org/en/Using_geolocation#Handling_errors |
| 1029 | if (gDebug) |
| 1030 | console.log(error.message); |
| 1031 | }, |
| 1032 | {enableHighAccuracy: true} |
| 1033 | ); |
| 1034 | } |
| 1035 | } |
| 1036 | |
| 1037 | function endTracking() { |
| 1038 | if (gActionLabel.textContent) { |
| 1039 | gActionLabel.textContent = ""; |
| 1040 | gAction.style.display = "none"; |
| 1041 | } |
| 1042 | if (gGeoWatchID) { |
| 1043 | gGeolocation.clearWatch(gGeoWatchID); |
| 1044 | } |
| 1045 | } |
| 1046 | |
| 1047 | function clearTrack() { |
| 1048 | gTrack = []; |
| 1049 | gTrackStore.clear(); |
| 1050 | drawTrack(); |
| 1051 | } |
| 1052 | |
| 1053 | var gTileService = { |
| 1054 | objStore: "tilecache", |
| 1055 | |
| 1056 | ageLimit: 14 * 86400 * 1000, // 2 weeks (in ms) |
| 1057 | |
| 1058 | get: function(aStyle, aCoords, aCallback) { |
| 1059 | var norm = normalizeCoords(aCoords); |
| 1060 | var dbkey = getTileKey(aStyle, norm); |
| 1061 | this.getDBCache(dbkey, function(aResult, aEvent) { |
| 1062 | if (aResult) { |
| 1063 | // We did get a cached object. |
| 1064 | aCallback(aResult.image, aStyle, aCoords, dbkey); |
| 1065 | // Look at the timestamp and return if it's not too old. |
| 1066 | if (aResult.timestamp + gTileService.ageLimit > Date.now()) |
| 1067 | return; |
| 1068 | // Reload cached tile otherwise. |
| 1069 | var oldDate = new Date(aResult.timestamp); |
| 1070 | console.log("reload cached tile: " + dbkey + " - " + oldDate.toUTCString()); |
| 1071 | } |
| 1072 | // Retrieve image from the web and store it in the cache. |
| 1073 | var XHR = new XMLHttpRequest(); |
| 1074 | XHR.open("GET", |
| 1075 | gMapStyles[aStyle].url |
| 1076 | .replace("{x}", norm.x) |
| 1077 | .replace("{y}", norm.y) |
| 1078 | .replace("{z}", norm.z) |
| 1079 | .replace("[a-c]", String.fromCharCode(97 + Math.floor(Math.random() * 2))) |
| 1080 | .replace("[1-4]", 1 + Math.floor(Math.random() * 3)), |
| 1081 | true); |
| 1082 | XHR.responseType = "blob"; |
| 1083 | XHR.addEventListener("load", function () { |
| 1084 | if (XHR.status === 200) { |
| 1085 | var blob = XHR.response; |
| 1086 | aCallback(blob, aStyle, aCoords, dbkey); |
| 1087 | gTileService.setDBCache(dbkey, {image: blob, timestamp: Date.now()}); |
| 1088 | } |
| 1089 | }, false); |
| 1090 | XHR.send(); |
| 1091 | }); |
| 1092 | }, |
| 1093 | |
| 1094 | getDBCache: function(aKey, aCallback) { |
| 1095 | if (!mainDB) |
| 1096 | return; |
| 1097 | var transaction = mainDB.transaction([this.objStore]); |
| 1098 | var request = transaction.objectStore(this.objStore).get(aKey); |
| 1099 | request.onsuccess = function(event) { |
| 1100 | aCallback(request.result, event); |
| 1101 | }; |
| 1102 | request.onerror = function(event) { |
| 1103 | // Errors can be handled here. |
| 1104 | aCallback(undefined, event); |
| 1105 | }; |
| 1106 | }, |
| 1107 | |
| 1108 | setDBCache: function(aKey, aValue, aCallback) { |
| 1109 | if (!mainDB) |
| 1110 | return; |
| 1111 | var success = false; |
| 1112 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 1113 | var objStore = transaction.objectStore(this.objStore); |
| 1114 | var request = objStore.put(aValue, aKey); |
| 1115 | request.onsuccess = function(event) { |
| 1116 | success = true; |
| 1117 | if (aCallback) |
| 1118 | aCallback(success, event); |
| 1119 | }; |
| 1120 | request.onerror = function(event) { |
| 1121 | // Errors can be handled here. |
| 1122 | if (aCallback) |
| 1123 | aCallback(success, event); |
| 1124 | }; |
| 1125 | }, |
| 1126 | |
| 1127 | unsetDBCache: function(aKey, aCallback) { |
| 1128 | if (!mainDB) |
| 1129 | return; |
| 1130 | var success = false; |
| 1131 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 1132 | var request = transaction.objectStore(this.objStore).delete(aKey); |
| 1133 | request.onsuccess = function(event) { |
| 1134 | success = true; |
| 1135 | if (aCallback) |
| 1136 | aCallback(success, event); |
| 1137 | }; |
| 1138 | request.onerror = function(event) { |
| 1139 | // Errors can be handled here. |
| 1140 | if (aCallback) |
| 1141 | aCallback(success, event); |
| 1142 | } |
| 1143 | }, |
| 1144 | |
| 1145 | clearDB: function(aCallback) { |
| 1146 | if (!mainDB) |
| 1147 | return; |
| 1148 | var success = false; |
| 1149 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 1150 | var request = transaction.objectStore(this.objStore).clear(); |
| 1151 | request.onsuccess = function(event) { |
| 1152 | success = true; |
| 1153 | if (aCallback) |
| 1154 | aCallback(success, event); |
| 1155 | }; |
| 1156 | request.onerror = function(event) { |
| 1157 | // Errors can be handled here. |
| 1158 | if (aCallback) |
| 1159 | aCallback(success, event); |
| 1160 | } |
| 1161 | } |
| 1162 | }; |