| 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, gPinchStartWidth; |
| 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 | console.log("map vars set, loading prefs..."); |
| 93 | loadPrefs(); |
| 94 | } |
| 95 | |
| 96 | function loadPrefs(aEvent) { |
| 97 | if (aEvent && aEvent.type == "prefs-step") { |
| 98 | console.log("wait: " + gWaitCounter); |
| 99 | if (gWaitCounter == 0) { |
| 100 | gAction.removeEventListener(aEvent.type, loadPrefs, false); |
| 101 | gMapPrefsLoaded = true; |
| 102 | console.log("prefs loaded."); |
| 103 | |
| 104 | gTrackCanvas.addEventListener("mouseup", mapEvHandler, false); |
| 105 | gTrackCanvas.addEventListener("mousemove", mapEvHandler, false); |
| 106 | gTrackCanvas.addEventListener("mousedown", mapEvHandler, false); |
| 107 | gTrackCanvas.addEventListener("mouseout", mapEvHandler, false); |
| 108 | |
| 109 | gTrackCanvas.addEventListener("touchstart", mapEvHandler, false); |
| 110 | gTrackCanvas.addEventListener("touchmove", mapEvHandler, false); |
| 111 | gTrackCanvas.addEventListener("touchend", mapEvHandler, false); |
| 112 | gTrackCanvas.addEventListener("touchcancel", mapEvHandler, false); |
| 113 | gTrackCanvas.addEventListener("touchleave", mapEvHandler, false); |
| 114 | |
| 115 | gTrackCanvas.addEventListener("wheel", mapEvHandler, false); |
| 116 | |
| 117 | document.getElementById("body").addEventListener("keydown", mapEvHandler, false); |
| 118 | |
| 119 | document.getElementById("copyright").innerHTML = |
| 120 | gMapStyles[gActiveMap].copyright; |
| 121 | |
| 122 | gLoadingTile = new Image(); |
| 123 | gLoadingTile.src = "style/loading.png"; |
| 124 | gLoadingTile.onload = function() { |
| 125 | var throwEv = new CustomEvent("mapinit-done"); |
| 126 | gAction.dispatchEvent(throwEv); |
| 127 | }; |
| 128 | } |
| 129 | } |
| 130 | else { |
| 131 | if (aEvent) |
| 132 | gAction.removeEventListener(aEvent.type, loadPrefs, false); |
| 133 | gAction.addEventListener("prefs-step", loadPrefs, false); |
| 134 | gWaitCounter++; |
| 135 | gPrefs.get("position", function(aValue) { |
| 136 | if (aValue) { |
| 137 | gPos = aValue; |
| 138 | } |
| 139 | gWaitCounter--; |
| 140 | var throwEv = new CustomEvent("prefs-step"); |
| 141 | gAction.dispatchEvent(throwEv); |
| 142 | }); |
| 143 | gWaitCounter++; |
| 144 | gPrefs.get("center_map", function(aValue) { |
| 145 | if (aValue === undefined) |
| 146 | document.getElementById("centerCheckbox").checked = true; |
| 147 | else |
| 148 | document.getElementById("centerCheckbox").checked = aValue; |
| 149 | setCentering(document.getElementById("centerCheckbox")); |
| 150 | gWaitCounter--; |
| 151 | var throwEv = new CustomEvent("prefs-step"); |
| 152 | gAction.dispatchEvent(throwEv); |
| 153 | }); |
| 154 | gWaitCounter++; |
| 155 | gPrefs.get("tracking_enabled", function(aValue) { |
| 156 | if (aValue === undefined) |
| 157 | document.getElementById("trackCheckbox").checked = true; |
| 158 | else |
| 159 | document.getElementById("trackCheckbox").checked = aValue; |
| 160 | gWaitCounter--; |
| 161 | var throwEv = new CustomEvent("prefs-step"); |
| 162 | gAction.dispatchEvent(throwEv); |
| 163 | }); |
| 164 | gWaitCounter++; |
| 165 | var trackLoadStarted = false; |
| 166 | gTrackStore.getListStepped(function(aTPoint) { |
| 167 | if (aTPoint) { |
| 168 | // Add in front and return new length. |
| 169 | var tracklen = gTrack.unshift(aTPoint); |
| 170 | // Redraw track every 100 values (initial paint will do first anyhow). |
| 171 | if (tracklen % 100 == 0) |
| 172 | drawTrack(); |
| 173 | } |
| 174 | else { |
| 175 | // Last point received. |
| 176 | drawTrack(); |
| 177 | } |
| 178 | if (!trackLoadStarted) { |
| 179 | // We have the most recent point, if present, rest will load async. |
| 180 | trackLoadStarted = true; |
| 181 | gWaitCounter--; |
| 182 | var throwEv = new CustomEvent("prefs-step"); |
| 183 | gAction.dispatchEvent(throwEv); |
| 184 | } |
| 185 | }); |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | function resizeAndDraw() { |
| 190 | var viewportWidth = Math.min(window.innerWidth, window.outerWidth); |
| 191 | var viewportHeight = Math.min(window.innerHeight, window.outerHeight); |
| 192 | if (gMapCanvas && gTrackCanvas) { |
| 193 | gMapCanvas.width = viewportWidth; |
| 194 | gMapCanvas.height = viewportHeight; |
| 195 | gTrackCanvas.width = viewportWidth; |
| 196 | gTrackCanvas.height = viewportHeight; |
| 197 | drawMap(); |
| 198 | showUI(); |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | // Using scale(x, y) together with drawing old data on scaled canvas would be an improvement for zooming. |
| 203 | // See https://developer.mozilla.org/en-US/docs/Canvas_tutorial/Transformations#Scaling |
| 204 | |
| 205 | function zoomIn() { |
| 206 | if (gPos.z < gMaxZoom) { |
| 207 | gPos.z++; |
| 208 | drawMap(); |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | function zoomOut() { |
| 213 | if (gPos.z > 0) { |
| 214 | gPos.z--; |
| 215 | drawMap(); |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | function zoomTo(aTargetLevel) { |
| 220 | aTargetLevel = parseInt(aTargetLevel); |
| 221 | if (aTargetLevel >= 0 && aTargetLevel <= gMaxZoom) { |
| 222 | gPos.z = aTargetLevel; |
| 223 | drawMap(); |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | function gps2xy(aLatitude, aLongitude) { |
| 228 | var maxZoomFactor = Math.pow(2, gMaxZoom) * gTileSize; |
| 229 | var convLat = aLatitude * Math.PI / 180; |
| 230 | var rawY = (1 - Math.log(Math.tan(convLat) + |
| 231 | 1 / Math.cos(convLat)) / Math.PI) / 2 * maxZoomFactor; |
| 232 | var rawX = (aLongitude + 180) / 360 * maxZoomFactor; |
| 233 | return {x: Math.round(rawX), |
| 234 | y: Math.round(rawY)}; |
| 235 | } |
| 236 | |
| 237 | function xy2gps(aX, aY) { |
| 238 | var maxZoomFactor = Math.pow(2, gMaxZoom) * gTileSize; |
| 239 | var n = Math.PI - 2 * Math.PI * aY / maxZoomFactor; |
| 240 | return {latitude: 180 / Math.PI * |
| 241 | Math.atan(0.5 * (Math.exp(n) - Math.exp(-n))), |
| 242 | longitude: aX / maxZoomFactor * 360 - 180}; |
| 243 | } |
| 244 | |
| 245 | function setMapStyle() { |
| 246 | var mapSel = document.getElementById("mapSelector"); |
| 247 | if (mapSel.selectedIndex >= 0 && gActiveMap != mapSel.value) { |
| 248 | gActiveMap = mapSel.value; |
| 249 | document.getElementById("copyright").innerHTML = |
| 250 | gMapStyles[gActiveMap].copyright; |
| 251 | showUI(); |
| 252 | drawMap(); |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | // A sane mod function that works for negative numbers. |
| 257 | // Returns a % b. |
| 258 | function mod(a, b) { |
| 259 | return ((a % b) + b) % b; |
| 260 | } |
| 261 | |
| 262 | function normalizeCoords(aCoords) { |
| 263 | var zoomFactor = Math.pow(2, aCoords.z); |
| 264 | return {x: mod(aCoords.x, zoomFactor), |
| 265 | y: mod(aCoords.y, zoomFactor), |
| 266 | z: aCoords.z}; |
| 267 | } |
| 268 | |
| 269 | // Returns true if the tile is outside the current view. |
| 270 | function isOutsideWindow(t) { |
| 271 | var pos = decodeIndex(t); |
| 272 | |
| 273 | var zoomFactor = Math.pow(2, gMaxZoom - pos.z); |
| 274 | var wid = gMapCanvas.width * zoomFactor; |
| 275 | var ht = gMapCanvas.height * zoomFactor; |
| 276 | |
| 277 | pos.x *= zoomFactor; |
| 278 | pos.y *= zoomFactor; |
| 279 | |
| 280 | var sz = gTileSize * zoomFactor; |
| 281 | if (pos.x > gPos.x + wid / 2 || pos.y > gPos.y + ht / 2 || |
| 282 | pos.x + sz < gPos.x - wid / 2 || pos.y - sz < gPos.y - ht / 2) |
| 283 | return true; |
| 284 | return false; |
| 285 | } |
| 286 | |
| 287 | function encodeIndex(x, y, z) { |
| 288 | var norm = normalizeCoords({x: x, y: y, z: z}); |
| 289 | return norm.x + "," + norm.y + "," + norm.z; |
| 290 | } |
| 291 | |
| 292 | function decodeIndex(encodedIdx) { |
| 293 | var ind = encodedIdx.split(",", 3); |
| 294 | return {x: ind[0], y: ind[1], z: ind[2]}; |
| 295 | } |
| 296 | |
| 297 | function drawMap(aPixels, aOverdraw) { |
| 298 | // aPixels is an object with left/right/top/bottom members telling how many |
| 299 | // pixels on the borders should actually be drawn. |
| 300 | // aOverdraw is a bool that tells if we should draw placeholders or draw |
| 301 | // straight over the existing content. |
| 302 | if (!aPixels) |
| 303 | aPixels = {left: gMapCanvas.width, right: gMapCanvas.width, |
| 304 | top: gMapCanvas.height, bottom: gMapCanvas.height}; |
| 305 | if (!aOverdraw) |
| 306 | aOverdraw = false; |
| 307 | |
| 308 | document.getElementById("zoomLevel").textContent = gPos.z; |
| 309 | gZoomFactor = Math.pow(2, gMaxZoom - gPos.z); |
| 310 | var wid = gMapCanvas.width * gZoomFactor; // Width in level 18 pixels. |
| 311 | var ht = gMapCanvas.height * gZoomFactor; // Height in level 18 pixels. |
| 312 | var size = gTileSize * gZoomFactor; // Tile size in level 18 pixels. |
| 313 | |
| 314 | var xMin = gPos.x - wid / 2; // Corners of the window in level 18 pixels. |
| 315 | var yMin = gPos.y - ht / 2; |
| 316 | var xMax = gPos.x + wid / 2; |
| 317 | var yMax = gPos.y + ht / 2; |
| 318 | |
| 319 | if (gMapPrefsLoaded && mainDB) |
| 320 | gPrefs.set("position", gPos); |
| 321 | |
| 322 | var tiles = {left: Math.ceil((xMin + aPixels.left * gZoomFactor) / size) - |
| 323 | (aPixels.left ? 0 : 1), |
| 324 | right: Math.floor((xMax - aPixels.right * gZoomFactor) / size) - |
| 325 | (aPixels.right ? 1 : 0), |
| 326 | top: Math.ceil((yMin + aPixels.top * gZoomFactor) / size) - |
| 327 | (aPixels.top ? 0 : 1), |
| 328 | bottom: Math.floor((yMax - aPixels.bottom * gZoomFactor) / size) - |
| 329 | (aPixels.bottom ? 1 : 0)}; |
| 330 | |
| 331 | // Go through all the tiles in the map, find out if to draw them and do so. |
| 332 | for (var x = Math.floor(xMin / size); x < Math.ceil(xMax / size); x++) { |
| 333 | for (var y = Math.floor(yMin / size); y < Math.ceil(yMax / size); y++) { // slow script warnings on the tablet appear here! |
| 334 | // Only go to the drawing step if we need to draw this tile. |
| 335 | if (x < tiles.left || x > tiles.right || |
| 336 | y < tiles.top || y > tiles.bottom) { |
| 337 | // Round here is **CRUCIAL** otherwise the images are filtered |
| 338 | // and the performance sucks (more than expected). |
| 339 | var xoff = Math.round((x * size - xMin) / gZoomFactor); |
| 340 | var yoff = Math.round((y * size - yMin) / gZoomFactor); |
| 341 | // Draw placeholder tile unless we overdraw. |
| 342 | if (!aOverdraw && |
| 343 | (x < tiles.left -1 || x > tiles.right + 1 || |
| 344 | y < tiles.top -1 || y > tiles.bottom + 1)) |
| 345 | gMapContext.drawImage(gLoadingTile, xoff, yoff); |
| 346 | |
| 347 | // Initiate loading/drawing of the actual tile. |
| 348 | gTileService.get(gActiveMap, {x: x, y: y, z: gPos.z}, |
| 349 | function(aImage, aStyle, aCoords) { |
| 350 | // Only draw if this applies for the current view. |
| 351 | if ((aStyle == gActiveMap) && (aCoords.z == gPos.z)) { |
| 352 | var ixMin = gPos.x - wid / 2; |
| 353 | var iyMin = gPos.y - ht / 2; |
| 354 | var ixoff = Math.round((aCoords.x * size - ixMin) / gZoomFactor); |
| 355 | var iyoff = Math.round((aCoords.y * size - iyMin) / gZoomFactor); |
| 356 | var URL = window.URL; |
| 357 | var imgURL = URL.createObjectURL(aImage); |
| 358 | var imgObj = new Image(); |
| 359 | imgObj.src = imgURL; |
| 360 | imgObj.onload = function() { |
| 361 | gMapContext.drawImage(imgObj, ixoff, iyoff); |
| 362 | URL.revokeObjectURL(imgURL); |
| 363 | } |
| 364 | } |
| 365 | }); |
| 366 | } |
| 367 | } |
| 368 | } |
| 369 | drawTrack(); |
| 370 | } |
| 371 | |
| 372 | function drawTrack() { |
| 373 | gLastDrawnPoint = null; |
| 374 | gCurPosMapCache = undefined; |
| 375 | gTrackContext.clearRect(0, 0, gTrackCanvas.width, gTrackCanvas.height); |
| 376 | if (gTrack.length) { |
| 377 | for (var i = 0; i < gTrack.length; i++) { |
| 378 | drawTrackPoint(gTrack[i].coords.latitude, gTrack[i].coords.longitude, |
| 379 | (i + 1 >= gTrack.length)); |
| 380 | } |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | function drawTrackPoint(aLatitude, aLongitude, lastPoint) { |
| 385 | var trackpoint = gps2xy(aLatitude, aLongitude); |
| 386 | // lastPoint is for optimizing (not actually executing the draw until the last) |
| 387 | trackpoint.optimized = (lastPoint === false); |
| 388 | var mappos = {x: Math.round((trackpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2), |
| 389 | y: Math.round((trackpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)}; |
| 390 | |
| 391 | if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) { |
| 392 | gTrackContext.strokeStyle = gTrackColor; |
| 393 | gTrackContext.fillStyle = gTrackContext.strokeStyle; |
| 394 | gTrackContext.lineWidth = gTrackWidth; |
| 395 | gTrackContext.lineCap = "round"; |
| 396 | gTrackContext.lineJoin = "round"; |
| 397 | } |
| 398 | if (!gLastDrawnPoint || gLastDrawnPoint == trackpoint) { |
| 399 | // This breaks optimiziation, so make sure to close path and reset optimization. |
| 400 | if (gLastDrawnPoint && gLastDrawnPoint.optimized) |
| 401 | gTrackContext.stroke(); |
| 402 | gTrackContext.beginPath(); |
| 403 | trackpoint.optimized = false; |
| 404 | gTrackContext.arc(mappos.x, mappos.y, |
| 405 | gTrackContext.lineWidth, 0, Math.PI * 2, false); |
| 406 | gTrackContext.fill(); |
| 407 | } |
| 408 | else { |
| 409 | if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) { |
| 410 | gTrackContext.beginPath(); |
| 411 | gTrackContext.moveTo(Math.round((gLastDrawnPoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2), |
| 412 | Math.round((gLastDrawnPoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)); |
| 413 | } |
| 414 | gTrackContext.lineTo(mappos.x, mappos.y); |
| 415 | if (!trackpoint.optimized) |
| 416 | gTrackContext.stroke(); |
| 417 | } |
| 418 | gLastDrawnPoint = trackpoint; |
| 419 | } |
| 420 | |
| 421 | function drawCurrentLocation(trackPoint) { |
| 422 | var locpoint = gps2xy(trackPoint.coords.latitude, trackPoint.coords.longitude); |
| 423 | var circleRadius = Math.round(gCurLocSize / 2); |
| 424 | var mappos = {x: Math.round((locpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2), |
| 425 | y: Math.round((locpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)}; |
| 426 | |
| 427 | undrawCurrentLocation(); |
| 428 | |
| 429 | // Cache overdrawn area. |
| 430 | gCurPosMapCache = |
| 431 | {point: locpoint, |
| 432 | radius: circleRadius, |
| 433 | data: gTrackContext.getImageData(mappos.x - circleRadius, |
| 434 | mappos.y - circleRadius, |
| 435 | circleRadius * 2, circleRadius * 2)}; |
| 436 | |
| 437 | gTrackContext.strokeStyle = gCurLocColor; |
| 438 | gTrackContext.fillStyle = gTrackContext.strokeStyle; |
| 439 | gTrackContext.beginPath(); |
| 440 | gTrackContext.arc(mappos.x, mappos.y, |
| 441 | circleRadius, 0, Math.PI * 2, false); |
| 442 | gTrackContext.fill(); |
| 443 | } |
| 444 | |
| 445 | function undrawCurrentLocation() { |
| 446 | if (gCurPosMapCache) { |
| 447 | var oldpoint = gCurPosMapCache.point; |
| 448 | var oldmp = {x: Math.round((oldpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2), |
| 449 | y: Math.round((oldpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)}; |
| 450 | gTrackContext.putImageData(gCurPosMapCache.data, |
| 451 | oldmp.x - gCurPosMapCache.radius, |
| 452 | oldmp.y - gCurPosMapCache.radius); |
| 453 | gCurPosMapCache = undefined; |
| 454 | } |
| 455 | } |
| 456 | |
| 457 | var mapEvHandler = { |
| 458 | handleEvent: function(aEvent) { |
| 459 | var touchEvent = aEvent.type.indexOf('touch') != -1; |
| 460 | |
| 461 | // Bail out if the event is happening on an input. |
| 462 | if (aEvent.target.tagName.toLowerCase() == "input") |
| 463 | return; |
| 464 | |
| 465 | // Bail out on unwanted map moves, but not zoom or keyboard events. |
| 466 | if (aEvent.type.indexOf("mouse") === 0 || aEvent.type.indexOf("touch") === 0) { |
| 467 | // Bail out if this is neither a touch nor left-click. |
| 468 | if (!touchEvent && aEvent.button != 0) |
| 469 | return; |
| 470 | |
| 471 | // Bail out if the started touch can't be found. |
| 472 | if (touchEvent && gDragging && |
| 473 | !aEvent.changedTouches.identifiedTouch(gDragTouchID)) |
| 474 | return; |
| 475 | } |
| 476 | |
| 477 | var coordObj = touchEvent ? |
| 478 | aEvent.changedTouches.identifiedTouch(gDragTouchID) : |
| 479 | aEvent; |
| 480 | |
| 481 | switch (aEvent.type) { |
| 482 | case "mousedown": |
| 483 | case "touchstart": |
| 484 | if (touchEvent) { |
| 485 | if (aEvent.targetTouches.length == 2) { |
| 486 | gPinchStartWidth = Math.sqrt( |
| 487 | Math.pow(aEvent.targetTouches.item(1).clientX - |
| 488 | aEvent.targetTouches.item(0).clientX, 2) + |
| 489 | Math.pow(aEvent.targetTouches.item(1).clientY - |
| 490 | aEvent.targetTouches.item(0).clientY, 2) |
| 491 | ); |
| 492 | console.log('!!!' + gPinchStartWidth); |
| 493 | } |
| 494 | gDragTouchID = aEvent.changedTouches.item(0).identifier; |
| 495 | coordObj = aEvent.changedTouches.identifiedTouch(gDragTouchID); |
| 496 | } |
| 497 | var x = coordObj.clientX - gMapCanvas.offsetLeft; |
| 498 | var y = coordObj.clientY - gMapCanvas.offsetTop; |
| 499 | |
| 500 | if (touchEvent || aEvent.button === 0) { |
| 501 | gDragging = true; |
| 502 | } |
| 503 | gLastMouseX = x; |
| 504 | gLastMouseY = y; |
| 505 | showUI(); |
| 506 | break; |
| 507 | case "mousemove": |
| 508 | case "touchmove": |
| 509 | if (touchEvent && aEvent.targetTouches.length == 2) { |
| 510 | curPinchStartWidth = Math.sqrt( |
| 511 | Math.pow(aEvent.targetTouches.item(1).clientX - |
| 512 | aEvent.targetTouches.item(0).clientX, 2) + |
| 513 | Math.pow(aEvent.targetTouches.item(1).clientY - |
| 514 | aEvent.targetTouches.item(0).clientY, 2) |
| 515 | ); |
| 516 | console.log(gPinchStartWidth + ' <?> ' + curPinchStartWidth); |
| 517 | if (gPinchStartWidth / curPinchStartWidth > 1.7 || |
| 518 | gPinchStartWidth / curPinchStartWidth < 0.6) { |
| 519 | var newZoomLevel = gPos.z + (gPinchStartWidth < curPinchStartWidth ? 1 : -1); |
| 520 | if ((newZoomLevel >= 0) && (newZoomLevel <= gMaxZoom)) { |
| 521 | // Calculate new center of the map - preserve middle of pinch. |
| 522 | // This means that pixel distance between old center and middle |
| 523 | // must equal pixel distance of new center and middle. |
| 524 | var x = (aEvent.targetTouches.item(1).clientX + |
| 525 | aEvent.targetTouches.item(0).clientX) / 2 - |
| 526 | gMapCanvas.offsetLeft; |
| 527 | var y = (aEvent.targetTouches.item(1).clientY + |
| 528 | aEvent.targetTouches.item(0).clientY) / 2 - |
| 529 | gMapCanvas.offsetTop; |
| 530 | |
| 531 | // Zoom factor after this action. |
| 532 | var newZoomFactor = Math.pow(2, gMaxZoom - newZoomLevel); |
| 533 | gPos.x -= (x - gMapCanvas.width / 2) * (newZoomFactor - gZoomFactor); |
| 534 | gPos.y -= (y - gMapCanvas.height / 2) * (newZoomFactor - gZoomFactor); |
| 535 | |
| 536 | if (gPinchStartWidth < curPinchStartWidth) |
| 537 | zoomIn(); |
| 538 | else |
| 539 | zoomOut(); |
| 540 | } |
| 541 | } |
| 542 | break; |
| 543 | } |
| 544 | var x = coordObj.clientX - gMapCanvas.offsetLeft; |
| 545 | var y = coordObj.clientY - gMapCanvas.offsetTop; |
| 546 | if (gDragging === true) { |
| 547 | var dX = x - gLastMouseX; |
| 548 | var dY = y - gLastMouseY; |
| 549 | gPos.x -= dX * gZoomFactor; |
| 550 | gPos.y -= dY * gZoomFactor; |
| 551 | if (true) { // use optimized path |
| 552 | var mapData = gMapContext.getImageData(0, 0, |
| 553 | gMapCanvas.width, |
| 554 | gMapCanvas.height); |
| 555 | gMapContext.clearRect(0, 0, gMapCanvas.width, gMapCanvas.height); |
| 556 | gMapContext.putImageData(mapData, dX, dY); |
| 557 | drawMap({left: (dX > 0) ? dX : 0, |
| 558 | right: (dX < 0) ? -dX : 0, |
| 559 | top: (dY > 0) ? dY : 0, |
| 560 | bottom: (dY < 0) ? -dY : 0}); |
| 561 | } |
| 562 | else { |
| 563 | drawMap(false, true); |
| 564 | } |
| 565 | showUI(); |
| 566 | } |
| 567 | gLastMouseX = x; |
| 568 | gLastMouseY = y; |
| 569 | break; |
| 570 | case "mouseup": |
| 571 | case "touchend": |
| 572 | gDragging = false; |
| 573 | showUI(); |
| 574 | break; |
| 575 | case "mouseout": |
| 576 | case "touchcancel": |
| 577 | case "touchleave": |
| 578 | //gDragging = false; |
| 579 | break; |
| 580 | case "wheel": |
| 581 | // If we'd want pixels, we'd need to calc up using aEvent.deltaMode. |
| 582 | // See https://developer.mozilla.org/en-US/docs/Mozilla_event_reference/wheel |
| 583 | |
| 584 | // Only accept (non-null) deltaY values |
| 585 | if (!aEvent.deltaY) |
| 586 | break; |
| 587 | |
| 588 | // Debug output: "coordinates" of the point the mouse was over. |
| 589 | /* |
| 590 | var ptCoord = {x: gPos.x + (x - gMapCanvas.width / 2) * gZoomFactor, |
| 591 | y: gPos.y + (x - gMapCanvas.height / 2) * gZoomFactor}; |
| 592 | var gpsCoord = xy2gps(ptCoord.x, ptCoord.y); |
| 593 | var pt2Coord = gps2xy(gpsCoord.latitude, gpsCoord.longitude); |
| 594 | console.log(ptCoord.x + "/" + ptCoord.y + " - " + |
| 595 | gpsCoord.latitude + "/" + gpsCoord.longitude + " - " + |
| 596 | pt2Coord.x + "/" + pt2Coord.y); |
| 597 | */ |
| 598 | |
| 599 | var newZoomLevel = gPos.z + (aEvent.deltaY < 0 ? 1 : -1); |
| 600 | if ((newZoomLevel >= 0) && (newZoomLevel <= gMaxZoom)) { |
| 601 | // Calculate new center of the map - same point stays under the mouse. |
| 602 | // This means that the pixel distance between the old center and point |
| 603 | // must equal the pixel distance of the new center and that point. |
| 604 | var x = coordObj.clientX - gMapCanvas.offsetLeft; |
| 605 | var y = coordObj.clientY - gMapCanvas.offsetTop; |
| 606 | |
| 607 | // Zoom factor after this action. |
| 608 | var newZoomFactor = Math.pow(2, gMaxZoom - newZoomLevel); |
| 609 | gPos.x -= (x - gMapCanvas.width / 2) * (newZoomFactor - gZoomFactor); |
| 610 | gPos.y -= (y - gMapCanvas.height / 2) * (newZoomFactor - gZoomFactor); |
| 611 | |
| 612 | if (aEvent.deltaY < 0) |
| 613 | zoomIn(); |
| 614 | else |
| 615 | zoomOut(); |
| 616 | } |
| 617 | break; |
| 618 | case "keydown": |
| 619 | // Allow keyboard control to move and zoom the map. |
| 620 | // Should use aEvent.key instead of aEvent.which but needs bug 680830. |
| 621 | // See https://developer.mozilla.org/en-US/docs/DOM/Mozilla_event_reference/keydown |
| 622 | var dX = 0; |
| 623 | var dY = 0; |
| 624 | switch (aEvent.which) { |
| 625 | case 39: // right |
| 626 | dX = -gTileSize / 2; |
| 627 | break; |
| 628 | case 37: // left |
| 629 | dX = gTileSize / 2; |
| 630 | break; |
| 631 | case 38: // up |
| 632 | dY = gTileSize / 2; |
| 633 | break; |
| 634 | case 40: // down |
| 635 | dY = -gTileSize / 2; |
| 636 | break; |
| 637 | case 87: // w |
| 638 | case 107: // + (numpad) |
| 639 | case 171: // + (normal key) |
| 640 | zoomIn(); |
| 641 | break; |
| 642 | case 83: // s |
| 643 | case 109: // - (numpad) |
| 644 | case 173: // - (normal key) |
| 645 | zoomOut(); |
| 646 | break; |
| 647 | case 48: // 0 |
| 648 | case 49: // 1 |
| 649 | case 50: // 2 |
| 650 | case 51: // 3 |
| 651 | case 52: // 4 |
| 652 | case 53: // 5 |
| 653 | case 54: // 6 |
| 654 | case 55: // 7 |
| 655 | case 56: // 8 |
| 656 | zoomTo(aEvent.which - 38); |
| 657 | break; |
| 658 | case 57: // 9 |
| 659 | zoomTo(9); |
| 660 | break; |
| 661 | case 96: // 0 (numpad) |
| 662 | case 97: // 1 (numpad) |
| 663 | case 98: // 2 (numpad) |
| 664 | case 99: // 3 (numpad) |
| 665 | case 100: // 4 (numpad) |
| 666 | case 101: // 5 (numpad) |
| 667 | case 102: // 6 (numpad) |
| 668 | case 103: // 7 (numpad) |
| 669 | case 104: // 8 (numpad) |
| 670 | zoomTo(aEvent.which - 86); |
| 671 | break; |
| 672 | case 105: // 9 (numpad) |
| 673 | zoomTo(9); |
| 674 | break; |
| 675 | default: // not supported |
| 676 | console.log("key not supported: " + aEvent.which); |
| 677 | break; |
| 678 | } |
| 679 | |
| 680 | // Move if needed. |
| 681 | if (dX || dY) { |
| 682 | gPos.x -= dX * gZoomFactor; |
| 683 | gPos.y -= dY * gZoomFactor; |
| 684 | if (true) { // use optimized path |
| 685 | var mapData = gMapContext.getImageData(0, 0, |
| 686 | gMapCanvas.width, |
| 687 | gMapCanvas.height); |
| 688 | gMapContext.clearRect(0, 0, gMapCanvas.width, gMapCanvas.height); |
| 689 | gMapContext.putImageData(mapData, dX, dY); |
| 690 | drawMap({left: (dX > 0) ? dX : 0, |
| 691 | right: (dX < 0) ? -dX : 0, |
| 692 | top: (dY > 0) ? dY : 0, |
| 693 | bottom: (dY < 0) ? -dY : 0}); |
| 694 | } |
| 695 | else { |
| 696 | drawMap(false, true); |
| 697 | } |
| 698 | } |
| 699 | break; |
| 700 | } |
| 701 | } |
| 702 | }; |
| 703 | |
| 704 | var geofake = { |
| 705 | tracking: false, |
| 706 | lastPos: {x: undefined, y: undefined}, |
| 707 | watchPosition: function(aSuccessCallback, aErrorCallback, aPrefObject) { |
| 708 | this.tracking = true; |
| 709 | var watchCall = function() { |
| 710 | // calc new position in lat/lon degrees |
| 711 | // 90° on Earth surface are ~10,000 km at the equator, |
| 712 | // so try moving at most 10m at a time |
| 713 | if (geofake.lastPos.x) |
| 714 | geofake.lastPos.x += (Math.random() - .5) * 90 / 1000000 |
| 715 | else |
| 716 | geofake.lastPos.x = 48.208174 |
| 717 | if (geofake.lastPos.y) |
| 718 | geofake.lastPos.y += (Math.random() - .5) * 90 / 1000000 |
| 719 | else |
| 720 | geofake.lastPos.y = 16.373819 |
| 721 | aSuccessCallback({timestamp: Date.now(), |
| 722 | coords: {latitude: geofake.lastPos.x, |
| 723 | longitude: geofake.lastPos.y, |
| 724 | accuracy: 20}}); |
| 725 | if (geofake.tracking) |
| 726 | setTimeout(watchCall, 1000); |
| 727 | }; |
| 728 | setTimeout(watchCall, 1000); |
| 729 | return "foo"; |
| 730 | }, |
| 731 | clearWatch: function(aID) { |
| 732 | this.tracking = false; |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | function setCentering(aCheckbox) { |
| 737 | if (gMapPrefsLoaded && mainDB) |
| 738 | gPrefs.set("center_map", aCheckbox.checked); |
| 739 | gCenterPosition = aCheckbox.checked; |
| 740 | } |
| 741 | |
| 742 | function setTracking(aCheckbox) { |
| 743 | if (gMapPrefsLoaded && mainDB) |
| 744 | gPrefs.set("tracking_enabled", aCheckbox.checked); |
| 745 | if (aCheckbox.checked) |
| 746 | startTracking(); |
| 747 | else |
| 748 | endTracking(); |
| 749 | } |
| 750 | |
| 751 | function startTracking() { |
| 752 | if (gGeolocation) { |
| 753 | gActionLabel.textContent = "Establishing Position"; |
| 754 | gAction.style.display = "block"; |
| 755 | gGeoWatchID = gGeolocation.watchPosition( |
| 756 | function(position) { |
| 757 | if (gActionLabel.textContent) { |
| 758 | gActionLabel.textContent = ""; |
| 759 | gAction.style.display = "none"; |
| 760 | } |
| 761 | // Coords spec: https://developer.mozilla.org/en/XPCOM_Interface_Reference/NsIDOMGeoPositionCoords |
| 762 | var tPoint = {time: position.timestamp, |
| 763 | coords: {latitude: position.coords.latitude, |
| 764 | longitude: position.coords.longitude, |
| 765 | altitude: position.coords.altitude, |
| 766 | accuracy: position.coords.accuracy, |
| 767 | altitudeAccuracy: position.coords.altitudeAccuracy, |
| 768 | heading: position.coords.heading, |
| 769 | speed: position.coords.speed}, |
| 770 | beginSegment: !gLastTrackPoint}; |
| 771 | // Only add point to track is accuracy is good enough. |
| 772 | if (tPoint.coords.accuracy < gMinTrackAccuracy) { |
| 773 | gLastTrackPoint = tPoint; |
| 774 | gTrack.push(tPoint); |
| 775 | try { gTrackStore.push(tPoint); } catch(e) {} |
| 776 | var redrawn = false; |
| 777 | if (gCenterPosition) { |
| 778 | var posCoord = gps2xy(position.coords.latitude, |
| 779 | position.coords.longitude); |
| 780 | if (Math.abs(gPos.x - posCoord.x) > gMapCanvas.width * gZoomFactor / 4 || |
| 781 | Math.abs(gPos.y - posCoord.y) > gMapCanvas.height * gZoomFactor / 4) { |
| 782 | gPos.x = posCoord.x; |
| 783 | gPos.y = posCoord.y; |
| 784 | drawMap(); // This draws the current point as well. |
| 785 | redrawn = true; |
| 786 | } |
| 787 | } |
| 788 | if (!redrawn) |
| 789 | undrawCurrentLocation(); |
| 790 | drawTrackPoint(position.coords.latitude, position.coords.longitude, true); |
| 791 | } |
| 792 | drawCurrentLocation(tPoint); |
| 793 | }, |
| 794 | function(error) { |
| 795 | // Ignore erros for the moment, but this is good for debugging. |
| 796 | // See https://developer.mozilla.org/en/Using_geolocation#Handling_errors |
| 797 | if (gDebug) |
| 798 | console.log(error.message); |
| 799 | }, |
| 800 | {enableHighAccuracy: true} |
| 801 | ); |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | function endTracking() { |
| 806 | if (gActionLabel.textContent) { |
| 807 | gActionLabel.textContent = ""; |
| 808 | gAction.style.display = "none"; |
| 809 | } |
| 810 | if (gGeoWatchID) { |
| 811 | gGeolocation.clearWatch(gGeoWatchID); |
| 812 | } |
| 813 | } |
| 814 | |
| 815 | function clearTrack() { |
| 816 | gTrack = []; |
| 817 | gTrackStore.clear(); |
| 818 | drawTrack(); |
| 819 | } |
| 820 | |
| 821 | var gTileService = { |
| 822 | objStore: "tilecache", |
| 823 | |
| 824 | ageLimit: 14 * 86400 * 1000, // 2 weeks (in ms) |
| 825 | |
| 826 | get: function(aStyle, aCoords, aCallback) { |
| 827 | var norm = normalizeCoords(aCoords); |
| 828 | var dbkey = aStyle + "::" + norm.x + "," + norm.y + "," + norm.z; |
| 829 | this.getDBCache(dbkey, function(aResult, aEvent) { |
| 830 | if (aResult) { |
| 831 | // We did get a cached object. |
| 832 | aCallback(aResult.image, aStyle, aCoords); |
| 833 | // Look at the timestamp and return if it's not too old. |
| 834 | if (aResult.timestamp + gTileService.ageLimit > Date.now()) |
| 835 | return; |
| 836 | // Reload cached tile otherwise. |
| 837 | var oldDate = new Date(aResult.timestamp); |
| 838 | console.log("reload cached tile: " + dbkey + " - " + oldDate.toUTCString()); |
| 839 | } |
| 840 | // Retrieve image from the web and store it in the cache. |
| 841 | var XHR = new XMLHttpRequest(); |
| 842 | XHR.open("GET", |
| 843 | gMapStyles[aStyle].url |
| 844 | .replace("{x}", norm.x) |
| 845 | .replace("{y}", norm.y) |
| 846 | .replace("{z}", norm.z) |
| 847 | .replace("[a-c]", String.fromCharCode(97 + Math.floor(Math.random() * 2))) |
| 848 | .replace("[1-4]", 1 + Math.floor(Math.random() * 3)), |
| 849 | true); |
| 850 | XHR.responseType = "blob"; |
| 851 | XHR.addEventListener("load", function () { |
| 852 | if (XHR.status === 200) { |
| 853 | var blob = XHR.response; |
| 854 | aCallback(blob, aStyle, aCoords); |
| 855 | gTileService.setDBCache(dbkey, {image: blob, timestamp: Date.now()}); |
| 856 | } |
| 857 | }, false); |
| 858 | XHR.send(); |
| 859 | }); |
| 860 | }, |
| 861 | |
| 862 | getDBCache: function(aKey, aCallback) { |
| 863 | if (!mainDB) |
| 864 | return; |
| 865 | var transaction = mainDB.transaction([this.objStore]); |
| 866 | var request = transaction.objectStore(this.objStore).get(aKey); |
| 867 | request.onsuccess = function(event) { |
| 868 | aCallback(request.result, event); |
| 869 | }; |
| 870 | request.onerror = function(event) { |
| 871 | // Errors can be handled here. |
| 872 | aCallback(undefined, event); |
| 873 | }; |
| 874 | }, |
| 875 | |
| 876 | setDBCache: function(aKey, aValue, aCallback) { |
| 877 | if (!mainDB) |
| 878 | return; |
| 879 | var success = false; |
| 880 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 881 | var objStore = transaction.objectStore(this.objStore); |
| 882 | var request = objStore.put(aValue, aKey); |
| 883 | request.onsuccess = function(event) { |
| 884 | success = true; |
| 885 | if (aCallback) |
| 886 | aCallback(success, event); |
| 887 | }; |
| 888 | request.onerror = function(event) { |
| 889 | // Errors can be handled here. |
| 890 | if (aCallback) |
| 891 | aCallback(success, event); |
| 892 | }; |
| 893 | }, |
| 894 | |
| 895 | unsetDBCache: function(aKey, aCallback) { |
| 896 | if (!mainDB) |
| 897 | return; |
| 898 | var success = false; |
| 899 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 900 | var request = transaction.objectStore(this.objStore).delete(aKey); |
| 901 | request.onsuccess = function(event) { |
| 902 | success = true; |
| 903 | if (aCallback) |
| 904 | aCallback(success, event); |
| 905 | }; |
| 906 | request.onerror = function(event) { |
| 907 | // Errors can be handled here. |
| 908 | if (aCallback) |
| 909 | aCallback(success, event); |
| 910 | } |
| 911 | }, |
| 912 | |
| 913 | clearDB: function(aCallback) { |
| 914 | if (!mainDB) |
| 915 | return; |
| 916 | var success = false; |
| 917 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 918 | var request = transaction.objectStore(this.objStore).clear(); |
| 919 | request.onsuccess = function(event) { |
| 920 | success = true; |
| 921 | if (aCallback) |
| 922 | aCallback(success, event); |
| 923 | }; |
| 924 | request.onerror = function(event) { |
| 925 | // Errors can be handled here. |
| 926 | if (aCallback) |
| 927 | aCallback(success, event); |
| 928 | } |
| 929 | } |
| 930 | }; |