| 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 gMapCanvas, gMapContext, gTrackCanvas, gTrackContext, gGeolocation; |
| 6 | var gDebug = false; |
| 7 | |
| 8 | var gTileSize = 256; |
| 9 | var gMaxZoom = 18; // The minimum is 0. |
| 10 | |
| 11 | var gMinTrackAccuracy = 1000; // meters |
| 12 | var gTrackWidth = 2; // pixels |
| 13 | var gTrackColor = "#FF0000"; |
| 14 | var gCurLocSize = 6; // pixels |
| 15 | var gCurLocColor = "#A00000"; |
| 16 | |
| 17 | var gMapStyles = { |
| 18 | // OSM tile usage policy: http://wiki.openstreetmap.org/wiki/Tile_usage_policy |
| 19 | // Find some more OSM ones at http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Tile_servers |
| 20 | osm_mapnik: |
| 21 | {name: "OpenStreetMap (Mapnik)", |
| 22 | url: "http://tile.openstreetmap.org/{z}/{x}/{y}.png", |
| 23 | 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>'}, |
| 24 | osm_cyclemap: |
| 25 | {name: "Cycle Map (OSM)", |
| 26 | url: "http://[a-c].tile.opencyclemap.org/cycle/{z}/{x}/{y}.png", |
| 27 | 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>'}, |
| 28 | osm_transmap: |
| 29 | {name: "Transport Map (OSM)", |
| 30 | url: "http://[a-c].tile2.opencyclemap.org/transport/{z}/{x}/{y}.png", |
| 31 | 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>'}, |
| 32 | mapquest_open: |
| 33 | {name: "MapQuest OSM", |
| 34 | url: "http://otile[1-4].mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.png", |
| 35 | 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>.'}, |
| 36 | mapquest_aerial: |
| 37 | {name: "MapQuest Open Aerial", |
| 38 | url: "http://otile[1-4].mqcdn.com/tiles/1.0.0/sat/{z}/{x}/{y}.jpg", |
| 39 | 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.'}, |
| 40 | opengeoserver_arial: |
| 41 | {name: "OpenGeoServer Aerial", |
| 42 | url: "http://services.opengeoserver.org/tiles/1.0.0/globe.aerial_EPSG3857/{z}/{x}/{y}.png?origin=nw", |
| 43 | 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>.'}, |
| 44 | google_map: |
| 45 | {name: "Google Maps", |
| 46 | url: " http://mt1.google.com/vt/x={x}&y={y}&z={z}", |
| 47 | copyright: 'Map data and imagery © <a href="http://maps.google.com/">Google</a>'}, |
| 48 | }; |
| 49 | var gActiveMap = "osm_mapnik"; |
| 50 | |
| 51 | var gPos = {x: 35630000.0, // Current position in the map in pixels at the maximum zoom level (18) |
| 52 | y: 23670000.0, // The range is 0-67108864 (2^gMaxZoom * gTileSize) |
| 53 | z: 5}; // This could be fractional if supported being between zoom levels. |
| 54 | |
| 55 | var gLastMouseX = 0; |
| 56 | var gLastMouseY = 0; |
| 57 | var gZoomFactor; |
| 58 | |
| 59 | var gLoadingTile; |
| 60 | |
| 61 | var gMapPrefsLoaded = false; |
| 62 | |
| 63 | var gDragging = false; |
| 64 | var gDragTouchID; |
| 65 | |
| 66 | var gGeoWatchID; |
| 67 | var gTrack = []; |
| 68 | var gLastTrackPoint, gLastDrawnPoint; |
| 69 | var gCenterPosition = true; |
| 70 | |
| 71 | var gCurPosMapCache; |
| 72 | |
| 73 | function initMap() { |
| 74 | gGeolocation = navigator.geolocation; |
| 75 | gMapCanvas = document.getElementById("map"); |
| 76 | gMapContext = gMapCanvas.getContext("2d"); |
| 77 | gTrackCanvas = document.getElementById("track"); |
| 78 | gTrackContext = gTrackCanvas.getContext("2d"); |
| 79 | if (!gActiveMap) |
| 80 | gActiveMap = "osm_mapnik"; |
| 81 | |
| 82 | //gDebug = true; |
| 83 | if (gDebug) { |
| 84 | gGeolocation = geofake; |
| 85 | var hiddenList = document.getElementsByClassName("debugHide"); |
| 86 | // last to first - list of elements with that class is changing! |
| 87 | for (var i = hiddenList.length - 1; i >= 0; i--) { |
| 88 | hiddenList[i].classList.remove("debugHide"); |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | var loopCnt = 0; |
| 93 | var getPersistentPrefs = function() { |
| 94 | if (mainDB) { |
| 95 | gWaitCounter++; |
| 96 | gPrefs.get("position", function(aValue) { |
| 97 | if (aValue) { |
| 98 | gPos = aValue; |
| 99 | gWaitCounter--; |
| 100 | } |
| 101 | }); |
| 102 | gWaitCounter++; |
| 103 | gPrefs.get("center_map", function(aValue) { |
| 104 | if (aValue === undefined) |
| 105 | document.getElementById("centerCheckbox").checked = true; |
| 106 | else |
| 107 | document.getElementById("centerCheckbox").checked = aValue; |
| 108 | setCentering(document.getElementById("centerCheckbox")); |
| 109 | gWaitCounter--; |
| 110 | }); |
| 111 | gWaitCounter++; |
| 112 | gPrefs.get("tracking_enabled", function(aValue) { |
| 113 | if (aValue === undefined) |
| 114 | document.getElementById("trackCheckbox").checked = true; |
| 115 | else |
| 116 | document.getElementById("trackCheckbox").checked = aValue; |
| 117 | gWaitCounter--; |
| 118 | }); |
| 119 | gWaitCounter++; |
| 120 | gTrackStore.getList(function(aTPoints) { |
| 121 | if (gDebug) |
| 122 | console.log(aTPoints.length + " points loaded."); |
| 123 | if (aTPoints.length) { |
| 124 | gTrack = aTPoints; |
| 125 | } |
| 126 | gWaitCounter--; |
| 127 | }); |
| 128 | } |
| 129 | else |
| 130 | setTimeout(getPersistentPrefs, 100); |
| 131 | loopCnt++; |
| 132 | if (loopCnt > 50) { |
| 133 | console.log("Loading prefs failed."); |
| 134 | } |
| 135 | }; |
| 136 | getPersistentPrefs(); |
| 137 | |
| 138 | gTrackCanvas.addEventListener("mouseup", mapEvHandler, false); |
| 139 | gTrackCanvas.addEventListener("mousemove", mapEvHandler, false); |
| 140 | gTrackCanvas.addEventListener("mousedown", mapEvHandler, false); |
| 141 | gTrackCanvas.addEventListener("mouseout", mapEvHandler, false); |
| 142 | |
| 143 | gTrackCanvas.addEventListener("touchstart", mapEvHandler, false); |
| 144 | gTrackCanvas.addEventListener("touchmove", mapEvHandler, false); |
| 145 | gTrackCanvas.addEventListener("touchend", mapEvHandler, false); |
| 146 | gTrackCanvas.addEventListener("touchcancel", mapEvHandler, false); |
| 147 | gTrackCanvas.addEventListener("touchleave", mapEvHandler, false); |
| 148 | |
| 149 | // XXX deprecated? see https://groups.google.com/forum/?fromgroups#!topic/mozilla.dev.planning/kuhrORubaRY[1-25] |
| 150 | gTrackCanvas.addEventListener("DOMMouseScroll", mapEvHandler, false); |
| 151 | gTrackCanvas.addEventListener("mousewheel", mapEvHandler, false); |
| 152 | |
| 153 | document.getElementById("copyright").innerHTML = |
| 154 | gMapStyles[gActiveMap].copyright; |
| 155 | |
| 156 | gLoadingTile = new Image(); |
| 157 | gLoadingTile.src = "style/loading.png"; |
| 158 | gWaitCounter++; |
| 159 | gLoadingTile.onload = function() { gWaitCounter--; }; |
| 160 | } |
| 161 | |
| 162 | function resizeAndDraw() { |
| 163 | var viewportWidth = Math.min(window.innerWidth, window.outerWidth); |
| 164 | var viewportHeight = Math.min(window.innerHeight, window.outerHeight); |
| 165 | if (gMapCanvas && gTrackCanvas) { |
| 166 | gMapCanvas.width = viewportWidth; |
| 167 | gMapCanvas.height = viewportHeight; |
| 168 | gTrackCanvas.width = viewportWidth; |
| 169 | gTrackCanvas.height = viewportHeight; |
| 170 | drawMap(); |
| 171 | showUI(); |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | // Using scale(x, y) together with drawing old data on scaled canvas would be an improvement for zooming. |
| 176 | // See https://developer.mozilla.org/en-US/docs/Canvas_tutorial/Transformations#Scaling |
| 177 | |
| 178 | function zoomIn() { |
| 179 | if (gPos.z < gMaxZoom) { |
| 180 | gPos.z++; |
| 181 | drawMap(); |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | function zoomOut() { |
| 186 | if (gPos.z > 0) { |
| 187 | gPos.z--; |
| 188 | drawMap(); |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | function gps2xy(aLatitude, aLongitude) { |
| 193 | var maxZoomFactor = Math.pow(2, gMaxZoom) * gTileSize; |
| 194 | var convLat = aLatitude * Math.PI / 180; |
| 195 | var rawY = (1 - Math.log(Math.tan(convLat) + |
| 196 | 1 / Math.cos(convLat)) / Math.PI) / 2 * maxZoomFactor; |
| 197 | var rawX = (aLongitude + 180) / 360 * maxZoomFactor; |
| 198 | return {x: Math.round(rawX), |
| 199 | y: Math.round(rawY)}; |
| 200 | } |
| 201 | |
| 202 | function xy2gps(aX, aY) { |
| 203 | var maxZoomFactor = Math.pow(2, gMaxZoom) * gTileSize; |
| 204 | var n = Math.PI - 2 * Math.PI * aY / maxZoomFactor; |
| 205 | return {latitude: 180 / Math.PI * |
| 206 | Math.atan(0.5 * (Math.exp(n) - Math.exp(-n))), |
| 207 | longitude: aX / maxZoomFactor * 360 - 180}; |
| 208 | } |
| 209 | |
| 210 | function setMapStyle() { |
| 211 | var mapSel = document.getElementById("mapSelector"); |
| 212 | if (mapSel.selectedIndex >= 0 && gActiveMap != mapSel.value) { |
| 213 | gActiveMap = mapSel.value; |
| 214 | document.getElementById("copyright").innerHTML = |
| 215 | gMapStyles[gActiveMap].copyright; |
| 216 | showUI(); |
| 217 | drawMap(); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | // A sane mod function that works for negative numbers. |
| 222 | // Returns a % b. |
| 223 | function mod(a, b) { |
| 224 | return ((a % b) + b) % b; |
| 225 | } |
| 226 | |
| 227 | function normalizeCoords(aCoords) { |
| 228 | var zoomFactor = Math.pow(2, aCoords.z); |
| 229 | return {x: mod(aCoords.x, zoomFactor), |
| 230 | y: mod(aCoords.y, zoomFactor), |
| 231 | z: aCoords.z}; |
| 232 | } |
| 233 | |
| 234 | // Returns true if the tile is outside the current view. |
| 235 | function isOutsideWindow(t) { |
| 236 | var pos = decodeIndex(t); |
| 237 | |
| 238 | var zoomFactor = Math.pow(2, gMaxZoom - pos.z); |
| 239 | var wid = gMapCanvas.width * zoomFactor; |
| 240 | var ht = gMapCanvas.height * zoomFactor; |
| 241 | |
| 242 | pos.x *= zoomFactor; |
| 243 | pos.y *= zoomFactor; |
| 244 | |
| 245 | var sz = gTileSize * zoomFactor; |
| 246 | if (pos.x > gPos.x + wid / 2 || pos.y > gPos.y + ht / 2 || |
| 247 | pos.x + sz < gPos.x - wid / 2 || pos.y - sz < gPos.y - ht / 2) |
| 248 | return true; |
| 249 | return false; |
| 250 | } |
| 251 | |
| 252 | function encodeIndex(x, y, z) { |
| 253 | var norm = normalizeCoords({x: x, y: y, z: z}); |
| 254 | return norm.x + "," + norm.y + "," + norm.z; |
| 255 | } |
| 256 | |
| 257 | function decodeIndex(encodedIdx) { |
| 258 | var ind = encodedIdx.split(",", 3); |
| 259 | return {x: ind[0], y: ind[1], z: ind[2]}; |
| 260 | } |
| 261 | |
| 262 | function drawMap(aPixels, aOverdraw) { |
| 263 | // aPixels is an object with left/right/top/bottom members telling how many |
| 264 | // pixels on the borders should actually be drawn. |
| 265 | // aOverdraw is a bool that tells if we should draw placeholders or draw |
| 266 | // straight over the existing content. |
| 267 | if (!aPixels) |
| 268 | aPixels = {left: gMapCanvas.width, right: gMapCanvas.width, |
| 269 | top: gMapCanvas.height, bottom: gMapCanvas.height}; |
| 270 | if (!aOverdraw) |
| 271 | aOverdraw = false; |
| 272 | |
| 273 | document.getElementById("zoomLevel").textContent = gPos.z; |
| 274 | gZoomFactor = Math.pow(2, gMaxZoom - gPos.z); |
| 275 | var wid = gMapCanvas.width * gZoomFactor; // Width in level 18 pixels. |
| 276 | var ht = gMapCanvas.height * gZoomFactor; // Height in level 18 pixels. |
| 277 | var size = gTileSize * gZoomFactor; // Tile size in level 18 pixels. |
| 278 | |
| 279 | var xMin = gPos.x - wid / 2; // Corners of the window in level 18 pixels. |
| 280 | var yMin = gPos.y - ht / 2; |
| 281 | var xMax = gPos.x + wid / 2; |
| 282 | var yMax = gPos.y + ht / 2; |
| 283 | |
| 284 | if (gMapPrefsLoaded && mainDB) |
| 285 | gPrefs.set("position", gPos); |
| 286 | |
| 287 | var tiles = {left: Math.ceil((xMin + aPixels.left * gZoomFactor) / size) - |
| 288 | (aPixels.left ? 0 : 1), |
| 289 | right: Math.floor((xMax - aPixels.right * gZoomFactor) / size) - |
| 290 | (aPixels.right ? 1 : 0), |
| 291 | top: Math.ceil((yMin + aPixels.top * gZoomFactor) / size) - |
| 292 | (aPixels.top ? 0 : 1), |
| 293 | bottom: Math.floor((yMax - aPixels.bottom * gZoomFactor) / size) - |
| 294 | (aPixels.bottom ? 1 : 0)}; |
| 295 | |
| 296 | // Go through all the tiles in the map, find out if to draw them and do so. |
| 297 | for (var x = Math.floor(xMin / size); x < Math.ceil(xMax / size); x++) { |
| 298 | for (var y = Math.floor(yMin / size); y < Math.ceil(yMax / size); y++) { // slow script warnings on the tablet appear here! |
| 299 | // Only go to the drawing step if we need to draw this tile. |
| 300 | if (x < tiles.left || x > tiles.right || |
| 301 | y < tiles.top || y > tiles.bottom) { |
| 302 | // Round here is **CRUCIAL** otherwise the images are filtered |
| 303 | // and the performance sucks (more than expected). |
| 304 | var xoff = Math.round((x * size - xMin) / gZoomFactor); |
| 305 | var yoff = Math.round((y * size - yMin) / gZoomFactor); |
| 306 | // Draw placeholder tile unless we overdraw. |
| 307 | if (!aOverdraw && |
| 308 | (x < tiles.left -1 || x > tiles.right + 1 || |
| 309 | y < tiles.top -1 || y > tiles.bottom + 1)) |
| 310 | gMapContext.drawImage(gLoadingTile, xoff, yoff); |
| 311 | |
| 312 | // Initiate loading/drawing of the actual tile. |
| 313 | gTileService.get(gActiveMap, {x: x, y: y, z: gPos.z}, |
| 314 | function(aImage, aStyle, aCoords) { |
| 315 | // Only draw if this applies for the current view. |
| 316 | if ((aStyle == gActiveMap) && (aCoords.z == gPos.z)) { |
| 317 | var ixMin = gPos.x - wid / 2; |
| 318 | var iyMin = gPos.y - ht / 2; |
| 319 | var ixoff = Math.round((aCoords.x * size - ixMin) / gZoomFactor); |
| 320 | var iyoff = Math.round((aCoords.y * size - iyMin) / gZoomFactor); |
| 321 | var URL = window.URL; |
| 322 | var imgURL = URL.createObjectURL(aImage); |
| 323 | var imgObj = new Image(); |
| 324 | imgObj.src = imgURL; |
| 325 | imgObj.onload = function() { |
| 326 | gMapContext.drawImage(imgObj, ixoff, iyoff); |
| 327 | URL.revokeObjectURL(imgURL); |
| 328 | } |
| 329 | } |
| 330 | }); |
| 331 | } |
| 332 | } |
| 333 | } |
| 334 | gLastDrawnPoint = null; |
| 335 | gCurPosMapCache = undefined; |
| 336 | gTrackContext.clearRect(0, 0, gTrackCanvas.width, gTrackCanvas.height); |
| 337 | if (gTrack.length) { |
| 338 | for (var i = 0; i < gTrack.length; i++) { |
| 339 | drawTrackPoint(gTrack[i].coords.latitude, gTrack[i].coords.longitude, |
| 340 | (i + 1 >= gTrack.length)); |
| 341 | } |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | function drawTrackPoint(aLatitude, aLongitude, lastPoint) { |
| 346 | var trackpoint = gps2xy(aLatitude, aLongitude); |
| 347 | // lastPoint is for optimizing (not actually executing the draw until the last) |
| 348 | trackpoint.optimized = (lastPoint === false); |
| 349 | var mappos = {x: Math.round((trackpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2), |
| 350 | y: Math.round((trackpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)}; |
| 351 | |
| 352 | if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) { |
| 353 | gTrackContext.strokeStyle = gTrackColor; |
| 354 | gTrackContext.fillStyle = gTrackContext.strokeStyle; |
| 355 | gTrackContext.lineWidth = gTrackWidth; |
| 356 | gTrackContext.lineCap = "round"; |
| 357 | gTrackContext.lineJoin = "round"; |
| 358 | } |
| 359 | if (!gLastDrawnPoint || gLastDrawnPoint == trackpoint) { |
| 360 | // This breaks optimiziation, so make sure to close path and reset optimization. |
| 361 | if (gLastDrawnPoint && gLastDrawnPoint.optimized) |
| 362 | gTrackContext.stroke(); |
| 363 | gTrackContext.beginPath(); |
| 364 | trackpoint.optimized = false; |
| 365 | gTrackContext.arc(mappos.x, mappos.y, |
| 366 | gTrackContext.lineWidth, 0, Math.PI * 2, false); |
| 367 | gTrackContext.fill(); |
| 368 | } |
| 369 | else { |
| 370 | if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) { |
| 371 | gTrackContext.beginPath(); |
| 372 | gTrackContext.moveTo(Math.round((gLastDrawnPoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2), |
| 373 | Math.round((gLastDrawnPoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)); |
| 374 | } |
| 375 | gTrackContext.lineTo(mappos.x, mappos.y); |
| 376 | if (!trackpoint.optimized) |
| 377 | gTrackContext.stroke(); |
| 378 | } |
| 379 | gLastDrawnPoint = trackpoint; |
| 380 | } |
| 381 | |
| 382 | function drawCurrentLocation(trackPoint) { |
| 383 | var locpoint = gps2xy(trackPoint.coords.latitude, trackPoint.coords.longitude); |
| 384 | var circleRadius = Math.round(gCurLocSize / 2); |
| 385 | var mappos = {x: Math.round((locpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2), |
| 386 | y: Math.round((locpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)}; |
| 387 | |
| 388 | undrawCurrentLocation(); |
| 389 | |
| 390 | // Cache overdrawn area. |
| 391 | gCurPosMapCache = |
| 392 | {point: locpoint, |
| 393 | radius: circleRadius, |
| 394 | data: gTrackContext.getImageData(mappos.x - circleRadius, |
| 395 | mappos.y - circleRadius, |
| 396 | circleRadius * 2, circleRadius * 2)}; |
| 397 | |
| 398 | gTrackContext.strokeStyle = gCurLocColor; |
| 399 | gTrackContext.fillStyle = gTrackContext.strokeStyle; |
| 400 | gTrackContext.beginPath(); |
| 401 | gTrackContext.arc(mappos.x, mappos.y, |
| 402 | circleRadius, 0, Math.PI * 2, false); |
| 403 | gTrackContext.fill(); |
| 404 | } |
| 405 | |
| 406 | function undrawCurrentLocation() { |
| 407 | if (gCurPosMapCache) { |
| 408 | var oldpoint = gCurPosMapCache.point; |
| 409 | var oldmp = {x: Math.round((oldpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2), |
| 410 | y: Math.round((oldpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)}; |
| 411 | gTrackContext.putImageData(gCurPosMapCache.data, |
| 412 | oldmp.x - gCurPosMapCache.radius, |
| 413 | oldmp.y - gCurPosMapCache.radius); |
| 414 | gCurPosMapCache = undefined; |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | var mapEvHandler = { |
| 419 | handleEvent: function(aEvent) { |
| 420 | var touchEvent = aEvent.type.indexOf('touch') != -1; |
| 421 | |
| 422 | // Bail out on unwanted map moves, but not zoom-changing events. |
| 423 | if (aEvent.type != "DOMMouseScroll" && aEvent.type != "mousewheel") { |
| 424 | // Bail out if this is neither a touch nor left-click. |
| 425 | if (!touchEvent && aEvent.button != 0) |
| 426 | return; |
| 427 | |
| 428 | // Bail out if the started touch can't be found. |
| 429 | if (touchEvent && gDragging && |
| 430 | !aEvent.changedTouches.identifiedTouch(gDragTouchID)) |
| 431 | return; |
| 432 | } |
| 433 | |
| 434 | var coordObj = touchEvent ? |
| 435 | aEvent.changedTouches.identifiedTouch(gDragTouchID) : |
| 436 | aEvent; |
| 437 | |
| 438 | switch (aEvent.type) { |
| 439 | case "mousedown": |
| 440 | case "touchstart": |
| 441 | if (touchEvent) { |
| 442 | gDragTouchID = aEvent.changedTouches.item(0).identifier; |
| 443 | coordObj = aEvent.changedTouches.identifiedTouch(gDragTouchID); |
| 444 | } |
| 445 | var x = coordObj.clientX - gMapCanvas.offsetLeft; |
| 446 | var y = coordObj.clientY - gMapCanvas.offsetTop; |
| 447 | |
| 448 | if (touchEvent || aEvent.button === 0) { |
| 449 | gDragging = true; |
| 450 | } |
| 451 | gLastMouseX = x; |
| 452 | gLastMouseY = y; |
| 453 | showUI(); |
| 454 | break; |
| 455 | case "mousemove": |
| 456 | case "touchmove": |
| 457 | var x = coordObj.clientX - gMapCanvas.offsetLeft; |
| 458 | var y = coordObj.clientY - gMapCanvas.offsetTop; |
| 459 | if (gDragging === true) { |
| 460 | var dX = x - gLastMouseX; |
| 461 | var dY = y - gLastMouseY; |
| 462 | gPos.x -= dX * gZoomFactor; |
| 463 | gPos.y -= dY * gZoomFactor; |
| 464 | var mapData = gMapContext.getImageData(0, 0, gMapCanvas.width, gMapCanvas.height); |
| 465 | gMapContext.clearRect(0, 0, gMapCanvas.width, gMapCanvas.height); |
| 466 | gMapContext.putImageData(mapData, dX, dY); |
| 467 | drawMap({left: (dX > 0) ? dX : 0, |
| 468 | right: (dX < 0) ? -dX : 0, |
| 469 | top: (dY > 0) ? dY : 0, |
| 470 | bottom: (dY < 0) ? -dY : 0}); |
| 471 | showUI(); |
| 472 | } |
| 473 | gLastMouseX = x; |
| 474 | gLastMouseY = y; |
| 475 | break; |
| 476 | case "mouseup": |
| 477 | case "touchend": |
| 478 | gDragging = false; |
| 479 | showUI(); |
| 480 | break; |
| 481 | case "mouseout": |
| 482 | case "touchcancel": |
| 483 | case "touchleave": |
| 484 | //gDragging = false; |
| 485 | break; |
| 486 | case "DOMMouseScroll": |
| 487 | case "mousewheel": |
| 488 | var delta = 0; |
| 489 | if (aEvent.wheelDelta) { |
| 490 | delta = aEvent.wheelDelta / 120; |
| 491 | if (window.opera) |
| 492 | delta = -delta; |
| 493 | } |
| 494 | else if (aEvent.detail) { |
| 495 | delta = -aEvent.detail / 3; |
| 496 | } |
| 497 | |
| 498 | // Debug output: "coordinates" of the point the mouse was over. |
| 499 | /* |
| 500 | var ptCoord = {x: gPos.x + (x - gMapCanvas.width / 2) * gZoomFactor, |
| 501 | y: gPos.y + (x - gMapCanvas.height / 2) * gZoomFactor}; |
| 502 | var gpsCoord = xy2gps(ptCoord.x, ptCoord.y); |
| 503 | var pt2Coord = gps2xy(gpsCoord.latitude, gpsCoord.longitude); |
| 504 | console.log(ptCoord.x + "/" + ptCoord.y + " - " + |
| 505 | gpsCoord.latitude + "/" + gpsCoord.longitude + " - " + |
| 506 | pt2Coord.x + "/" + pt2Coord.y); |
| 507 | */ |
| 508 | |
| 509 | var newZoomLevel = gPos.z + (delta > 0 ? 1 : -1); |
| 510 | if ((newZoomLevel >= 0) && (newZoomLevel <= gMaxZoom)) { |
| 511 | // Calculate new center of the map - same point stays under the mouse. |
| 512 | // This means that the pixel distance between the old center and point |
| 513 | // must equal the pixel distance of the new center and that point. |
| 514 | var x = coordObj.clientX - gMapCanvas.offsetLeft; |
| 515 | var y = coordObj.clientY - gMapCanvas.offsetTop; |
| 516 | |
| 517 | // Zoom factor after this action. |
| 518 | var newZoomFactor = Math.pow(2, gMaxZoom - newZoomLevel); |
| 519 | gPos.x -= (x - gMapCanvas.width / 2) * (newZoomFactor - gZoomFactor); |
| 520 | gPos.y -= (y - gMapCanvas.height / 2) * (newZoomFactor - gZoomFactor); |
| 521 | |
| 522 | if (delta > 0) |
| 523 | zoomIn(); |
| 524 | else if (delta < 0) |
| 525 | zoomOut(); |
| 526 | } |
| 527 | break; |
| 528 | } |
| 529 | } |
| 530 | }; |
| 531 | |
| 532 | var geofake = { |
| 533 | tracking: false, |
| 534 | lastPos: {x: undefined, y: undefined}, |
| 535 | watchPosition: function(aSuccessCallback, aErrorCallback, aPrefObject) { |
| 536 | this.tracking = true; |
| 537 | var watchCall = function() { |
| 538 | // calc new position in lat/lon degrees |
| 539 | // 90° on Earth surface are ~10,000 km at the equator, |
| 540 | // so try moving at most 10m at a time |
| 541 | if (geofake.lastPos.x) |
| 542 | geofake.lastPos.x += (Math.random() - .5) * 90 / 1000000 |
| 543 | else |
| 544 | geofake.lastPos.x = 48.208174 |
| 545 | if (geofake.lastPos.y) |
| 546 | geofake.lastPos.y += (Math.random() - .5) * 90 / 1000000 |
| 547 | else |
| 548 | geofake.lastPos.y = 16.373819 |
| 549 | aSuccessCallback({timestamp: Date.now(), |
| 550 | coords: {latitude: geofake.lastPos.x, |
| 551 | longitude: geofake.lastPos.y, |
| 552 | accuracy: 20}}); |
| 553 | if (geofake.tracking) |
| 554 | setTimeout(watchCall, 1000); |
| 555 | }; |
| 556 | setTimeout(watchCall, 1000); |
| 557 | return "foo"; |
| 558 | }, |
| 559 | clearWatch: function(aID) { |
| 560 | this.tracking = false; |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | function setCentering(aCheckbox) { |
| 565 | if (gMapPrefsLoaded && mainDB) |
| 566 | gPrefs.set("center_map", aCheckbox.checked); |
| 567 | gCenterPosition = aCheckbox.checked; |
| 568 | } |
| 569 | |
| 570 | function setTracking(aCheckbox) { |
| 571 | if (gMapPrefsLoaded && mainDB) |
| 572 | gPrefs.set("tracking_enabled", aCheckbox.checked); |
| 573 | if (aCheckbox.checked) |
| 574 | startTracking(); |
| 575 | else |
| 576 | endTracking(); |
| 577 | } |
| 578 | |
| 579 | function startTracking() { |
| 580 | if (gGeolocation) { |
| 581 | gActionLabel.textContent = "Establishing Position"; |
| 582 | gAction.style.display = "block"; |
| 583 | gGeoWatchID = gGeolocation.watchPosition( |
| 584 | function(position) { |
| 585 | if (gActionLabel.textContent) { |
| 586 | gActionLabel.textContent = ""; |
| 587 | gAction.style.display = "none"; |
| 588 | } |
| 589 | // Coords spec: https://developer.mozilla.org/en/XPCOM_Interface_Reference/NsIDOMGeoPositionCoords |
| 590 | var tPoint = {time: position.timestamp, |
| 591 | coords: {latitude: position.coords.latitude, |
| 592 | longitude: position.coords.longitude, |
| 593 | altitude: position.coords.altitude, |
| 594 | accuracy: position.coords.accuracy, |
| 595 | altitudeAccuracy: position.coords.altitudeAccuracy, |
| 596 | heading: position.coords.heading, |
| 597 | speed: position.coords.speed}, |
| 598 | beginSegment: !gLastTrackPoint}; |
| 599 | // Only add point to track is accuracy is good enough. |
| 600 | if (tPoint.coords.accuracy < gMinTrackAccuracy) { |
| 601 | gLastTrackPoint = tPoint; |
| 602 | gTrack.push(tPoint); |
| 603 | try { gTrackStore.push(tPoint); } catch(e) {} |
| 604 | var redrawn = false; |
| 605 | if (gCenterPosition) { |
| 606 | var posCoord = gps2xy(position.coords.latitude, |
| 607 | position.coords.longitude); |
| 608 | if (Math.abs(gPos.x - posCoord.x) > gMapCanvas.width * gZoomFactor / 4 || |
| 609 | Math.abs(gPos.y - posCoord.y) > gMapCanvas.height * gZoomFactor / 4) { |
| 610 | gPos.x = posCoord.x; |
| 611 | gPos.y = posCoord.y; |
| 612 | drawMap(); // This draws the current point as well. |
| 613 | redrawn = true; |
| 614 | } |
| 615 | } |
| 616 | if (!redrawn) |
| 617 | undrawCurrentLocation(); |
| 618 | drawTrackPoint(position.coords.latitude, position.coords.longitude, true); |
| 619 | } |
| 620 | drawCurrentLocation(tPoint); |
| 621 | }, |
| 622 | function(error) { |
| 623 | // Ignore erros for the moment, but this is good for debugging. |
| 624 | // See https://developer.mozilla.org/en/Using_geolocation#Handling_errors |
| 625 | if (gDebug) |
| 626 | console.log(error.message); |
| 627 | }, |
| 628 | {enableHighAccuracy: true} |
| 629 | ); |
| 630 | } |
| 631 | } |
| 632 | |
| 633 | function endTracking() { |
| 634 | if (gActionLabel.textContent) { |
| 635 | gActionLabel.textContent = ""; |
| 636 | gAction.style.display = "none"; |
| 637 | } |
| 638 | if (gGeoWatchID) { |
| 639 | gGeolocation.clearWatch(gGeoWatchID); |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | function clearTrack() { |
| 644 | gTrack = []; |
| 645 | gTrackStore.clear(); |
| 646 | drawMap(); |
| 647 | } |
| 648 | |
| 649 | var gTileService = { |
| 650 | objStore: "tilecache", |
| 651 | |
| 652 | ageLimit: 14 * 86400, // 2 weeks |
| 653 | |
| 654 | get: function(aStyle, aCoords, aCallback) { |
| 655 | var norm = normalizeCoords(aCoords); |
| 656 | var dbkey = aStyle + "::" + norm.x + "," + norm.y + "," + norm.z; |
| 657 | this.getDBCache(dbkey, function(aResult, aEvent) { |
| 658 | if (aResult) { |
| 659 | // We did get a cached object. |
| 660 | aCallback(aResult.image, aStyle, aCoords); |
| 661 | // Look at the timestamp and return if it's not too old. |
| 662 | if (aResult.timestamp + this.ageLimit > Date.now()) |
| 663 | return; |
| 664 | // Reload cached tile otherwise. |
| 665 | console.log("reload cached tile: " + dbkey); |
| 666 | } |
| 667 | // Retrieve image from the web and store it in the cache. |
| 668 | var XHR = new XMLHttpRequest(); |
| 669 | XHR.open("GET", |
| 670 | gMapStyles[aStyle].url |
| 671 | .replace("{x}", norm.x) |
| 672 | .replace("{y}", norm.y) |
| 673 | .replace("{z}", norm.z) |
| 674 | .replace("[a-c]", String.fromCharCode(97 + Math.floor(Math.random() * 2))) |
| 675 | .replace("[1-4]", 1 + Math.floor(Math.random() * 3)), |
| 676 | true); |
| 677 | XHR.responseType = "blob"; |
| 678 | XHR.addEventListener("load", function () { |
| 679 | if (XHR.status === 200) { |
| 680 | var blob = XHR.response; |
| 681 | gTileService.setDBCache(dbkey, {image: blob, timestamp: Date.now()}); |
| 682 | aCallback(blob, aStyle, aCoords); |
| 683 | } |
| 684 | }, false); |
| 685 | XHR.send(); |
| 686 | }); |
| 687 | }, |
| 688 | |
| 689 | getDBCache: function(aKey, aCallback) { |
| 690 | if (!mainDB) |
| 691 | return; |
| 692 | var transaction = mainDB.transaction([this.objStore]); |
| 693 | var request = transaction.objectStore(this.objStore).get(aKey); |
| 694 | request.onsuccess = function(event) { |
| 695 | aCallback(request.result, event); |
| 696 | }; |
| 697 | request.onerror = function(event) { |
| 698 | // Errors can be handled here. |
| 699 | aCallback(undefined, event); |
| 700 | }; |
| 701 | }, |
| 702 | |
| 703 | setDBCache: function(aKey, aValue, aCallback) { |
| 704 | if (!mainDB) |
| 705 | return; |
| 706 | var success = false; |
| 707 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 708 | var objStore = transaction.objectStore(this.objStore); |
| 709 | var request = objStore.put(aValue, aKey); |
| 710 | request.onsuccess = function(event) { |
| 711 | success = true; |
| 712 | if (aCallback) |
| 713 | aCallback(success, event); |
| 714 | }; |
| 715 | request.onerror = function(event) { |
| 716 | // Errors can be handled here. |
| 717 | if (aCallback) |
| 718 | aCallback(success, event); |
| 719 | }; |
| 720 | }, |
| 721 | |
| 722 | unsetDBCache: function(aKey, aCallback) { |
| 723 | if (!mainDB) |
| 724 | return; |
| 725 | var success = false; |
| 726 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 727 | var request = transaction.objectStore(this.objStore).delete(aKey); |
| 728 | request.onsuccess = function(event) { |
| 729 | success = true; |
| 730 | if (aCallback) |
| 731 | aCallback(success, event); |
| 732 | }; |
| 733 | request.onerror = function(event) { |
| 734 | // Errors can be handled here. |
| 735 | if (aCallback) |
| 736 | aCallback(success, event); |
| 737 | } |
| 738 | }, |
| 739 | |
| 740 | clearDB: function(aCallback) { |
| 741 | if (!mainDB) |
| 742 | return; |
| 743 | var success = false; |
| 744 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 745 | var request = transaction.objectStore(this.objStore).clear(); |
| 746 | request.onsuccess = function(event) { |
| 747 | success = true; |
| 748 | if (aCallback) |
| 749 | aCallback(success, event); |
| 750 | }; |
| 751 | request.onerror = function(event) { |
| 752 | // Errors can be handled here. |
| 753 | if (aCallback) |
| 754 | aCallback(success, event); |
| 755 | } |
| 756 | } |
| 757 | }; |