| 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 | var redrawBase = 100; |
| 167 | gTrackStore.getListStepped(function(aTPoint) { |
| 168 | if (aTPoint) { |
| 169 | // Add in front and return new length. |
| 170 | var tracklen = gTrack.unshift(aTPoint); |
| 171 | // Redraw track periodically, larger distance the longer it gets. |
| 172 | // Initial paint will do initial track drawing. |
| 173 | if (tracklen % redrawBase == 0) { |
| 174 | drawTrack(); |
| 175 | redrawBase = tracklen; |
| 176 | } |
| 177 | } |
| 178 | else { |
| 179 | // Last point received. |
| 180 | drawTrack(); |
| 181 | } |
| 182 | if (!trackLoadStarted) { |
| 183 | // We have the most recent point, if present, rest will load async. |
| 184 | trackLoadStarted = true; |
| 185 | gWaitCounter--; |
| 186 | var throwEv = new CustomEvent("prefs-step"); |
| 187 | gAction.dispatchEvent(throwEv); |
| 188 | } |
| 189 | }); |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | function resizeAndDraw() { |
| 194 | var viewportWidth = Math.min(window.innerWidth, window.outerWidth); |
| 195 | var viewportHeight = Math.min(window.innerHeight, window.outerHeight); |
| 196 | if (gMapCanvas && gTrackCanvas) { |
| 197 | gMapCanvas.width = viewportWidth; |
| 198 | gMapCanvas.height = viewportHeight; |
| 199 | gTrackCanvas.width = viewportWidth; |
| 200 | gTrackCanvas.height = viewportHeight; |
| 201 | drawMap(); |
| 202 | showUI(); |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | // Using scale(x, y) together with drawing old data on scaled canvas would be an improvement for zooming. |
| 207 | // See https://developer.mozilla.org/en-US/docs/Canvas_tutorial/Transformations#Scaling |
| 208 | |
| 209 | function zoomIn() { |
| 210 | if (gPos.z < gMaxZoom) { |
| 211 | gPos.z++; |
| 212 | drawMap(); |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | function zoomOut() { |
| 217 | if (gPos.z > 0) { |
| 218 | gPos.z--; |
| 219 | drawMap(); |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | function zoomTo(aTargetLevel) { |
| 224 | aTargetLevel = parseInt(aTargetLevel); |
| 225 | if (aTargetLevel >= 0 && aTargetLevel <= gMaxZoom) { |
| 226 | gPos.z = aTargetLevel; |
| 227 | drawMap(); |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | function gps2xy(aLatitude, aLongitude) { |
| 232 | var maxZoomFactor = Math.pow(2, gMaxZoom) * gTileSize; |
| 233 | var convLat = aLatitude * Math.PI / 180; |
| 234 | var rawY = (1 - Math.log(Math.tan(convLat) + |
| 235 | 1 / Math.cos(convLat)) / Math.PI) / 2 * maxZoomFactor; |
| 236 | var rawX = (aLongitude + 180) / 360 * maxZoomFactor; |
| 237 | return {x: Math.round(rawX), |
| 238 | y: Math.round(rawY)}; |
| 239 | } |
| 240 | |
| 241 | function xy2gps(aX, aY) { |
| 242 | var maxZoomFactor = Math.pow(2, gMaxZoom) * gTileSize; |
| 243 | var n = Math.PI - 2 * Math.PI * aY / maxZoomFactor; |
| 244 | return {latitude: 180 / Math.PI * |
| 245 | Math.atan(0.5 * (Math.exp(n) - Math.exp(-n))), |
| 246 | longitude: aX / maxZoomFactor * 360 - 180}; |
| 247 | } |
| 248 | |
| 249 | function setMapStyle() { |
| 250 | var mapSel = document.getElementById("mapSelector"); |
| 251 | if (mapSel.selectedIndex >= 0 && gActiveMap != mapSel.value) { |
| 252 | gActiveMap = mapSel.value; |
| 253 | document.getElementById("copyright").innerHTML = |
| 254 | gMapStyles[gActiveMap].copyright; |
| 255 | showUI(); |
| 256 | drawMap(); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | // A sane mod function that works for negative numbers. |
| 261 | // Returns a % b. |
| 262 | function mod(a, b) { |
| 263 | return ((a % b) + b) % b; |
| 264 | } |
| 265 | |
| 266 | function normalizeCoords(aCoords) { |
| 267 | var zoomFactor = Math.pow(2, aCoords.z); |
| 268 | return {x: mod(aCoords.x, zoomFactor), |
| 269 | y: mod(aCoords.y, zoomFactor), |
| 270 | z: aCoords.z}; |
| 271 | } |
| 272 | |
| 273 | // Returns true if the tile is outside the current view. |
| 274 | function isOutsideWindow(t) { |
| 275 | var pos = decodeIndex(t); |
| 276 | |
| 277 | var zoomFactor = Math.pow(2, gMaxZoom - pos.z); |
| 278 | var wid = gMapCanvas.width * zoomFactor; |
| 279 | var ht = gMapCanvas.height * zoomFactor; |
| 280 | |
| 281 | pos.x *= zoomFactor; |
| 282 | pos.y *= zoomFactor; |
| 283 | |
| 284 | var sz = gTileSize * zoomFactor; |
| 285 | if (pos.x > gPos.x + wid / 2 || pos.y > gPos.y + ht / 2 || |
| 286 | pos.x + sz < gPos.x - wid / 2 || pos.y - sz < gPos.y - ht / 2) |
| 287 | return true; |
| 288 | return false; |
| 289 | } |
| 290 | |
| 291 | function encodeIndex(x, y, z) { |
| 292 | var norm = normalizeCoords({x: x, y: y, z: z}); |
| 293 | return norm.x + "," + norm.y + "," + norm.z; |
| 294 | } |
| 295 | |
| 296 | function decodeIndex(encodedIdx) { |
| 297 | var ind = encodedIdx.split(",", 3); |
| 298 | return {x: ind[0], y: ind[1], z: ind[2]}; |
| 299 | } |
| 300 | |
| 301 | function drawMap(aPixels, aOverdraw) { |
| 302 | // aPixels is an object with left/right/top/bottom members telling how many |
| 303 | // pixels on the borders should actually be drawn. |
| 304 | // aOverdraw is a bool that tells if we should draw placeholders or draw |
| 305 | // straight over the existing content. |
| 306 | if (!aPixels) |
| 307 | aPixels = {left: gMapCanvas.width, right: gMapCanvas.width, |
| 308 | top: gMapCanvas.height, bottom: gMapCanvas.height}; |
| 309 | if (!aOverdraw) |
| 310 | aOverdraw = false; |
| 311 | |
| 312 | document.getElementById("zoomLevel").textContent = gPos.z; |
| 313 | gZoomFactor = Math.pow(2, gMaxZoom - gPos.z); |
| 314 | var wid = gMapCanvas.width * gZoomFactor; // Width in level 18 pixels. |
| 315 | var ht = gMapCanvas.height * gZoomFactor; // Height in level 18 pixels. |
| 316 | var size = gTileSize * gZoomFactor; // Tile size in level 18 pixels. |
| 317 | |
| 318 | var xMin = gPos.x - wid / 2; // Corners of the window in level 18 pixels. |
| 319 | var yMin = gPos.y - ht / 2; |
| 320 | var xMax = gPos.x + wid / 2; |
| 321 | var yMax = gPos.y + ht / 2; |
| 322 | |
| 323 | if (gMapPrefsLoaded && mainDB) |
| 324 | gPrefs.set("position", gPos); |
| 325 | |
| 326 | var tiles = {left: Math.ceil((xMin + aPixels.left * gZoomFactor) / size) - |
| 327 | (aPixels.left ? 0 : 1), |
| 328 | right: Math.floor((xMax - aPixels.right * gZoomFactor) / size) - |
| 329 | (aPixels.right ? 1 : 0), |
| 330 | top: Math.ceil((yMin + aPixels.top * gZoomFactor) / size) - |
| 331 | (aPixels.top ? 0 : 1), |
| 332 | bottom: Math.floor((yMax - aPixels.bottom * gZoomFactor) / size) - |
| 333 | (aPixels.bottom ? 1 : 0)}; |
| 334 | |
| 335 | // Go through all the tiles in the map, find out if to draw them and do so. |
| 336 | for (var x = Math.floor(xMin / size); x < Math.ceil(xMax / size); x++) { |
| 337 | for (var y = Math.floor(yMin / size); y < Math.ceil(yMax / size); y++) { // slow script warnings on the tablet appear here! |
| 338 | // Only go to the drawing step if we need to draw this tile. |
| 339 | if (x < tiles.left || x > tiles.right || |
| 340 | y < tiles.top || y > tiles.bottom) { |
| 341 | // Round here is **CRUCIAL** otherwise the images are filtered |
| 342 | // and the performance sucks (more than expected). |
| 343 | var xoff = Math.round((x * size - xMin) / gZoomFactor); |
| 344 | var yoff = Math.round((y * size - yMin) / gZoomFactor); |
| 345 | // Draw placeholder tile unless we overdraw. |
| 346 | if (!aOverdraw && |
| 347 | (x < tiles.left -1 || x > tiles.right + 1 || |
| 348 | y < tiles.top -1 || y > tiles.bottom + 1)) |
| 349 | gMapContext.drawImage(gLoadingTile, xoff, yoff); |
| 350 | |
| 351 | // Initiate loading/drawing of the actual tile. |
| 352 | gTileService.get(gActiveMap, {x: x, y: y, z: gPos.z}, |
| 353 | function(aImage, aStyle, aCoords) { |
| 354 | // Only draw if this applies for the current view. |
| 355 | if ((aStyle == gActiveMap) && (aCoords.z == gPos.z)) { |
| 356 | var ixMin = gPos.x - wid / 2; |
| 357 | var iyMin = gPos.y - ht / 2; |
| 358 | var ixoff = Math.round((aCoords.x * size - ixMin) / gZoomFactor); |
| 359 | var iyoff = Math.round((aCoords.y * size - iyMin) / gZoomFactor); |
| 360 | var URL = window.URL; |
| 361 | var imgURL = URL.createObjectURL(aImage); |
| 362 | var imgObj = new Image(); |
| 363 | imgObj.src = imgURL; |
| 364 | imgObj.onload = function() { |
| 365 | gMapContext.drawImage(imgObj, ixoff, iyoff); |
| 366 | URL.revokeObjectURL(imgURL); |
| 367 | } |
| 368 | } |
| 369 | }); |
| 370 | } |
| 371 | } |
| 372 | } |
| 373 | drawTrack(); |
| 374 | } |
| 375 | |
| 376 | function drawTrack() { |
| 377 | gLastDrawnPoint = null; |
| 378 | gCurPosMapCache = undefined; |
| 379 | gTrackContext.clearRect(0, 0, gTrackCanvas.width, gTrackCanvas.height); |
| 380 | if (gTrack.length) { |
| 381 | for (var i = 0; i < gTrack.length; i++) { |
| 382 | drawTrackPoint(gTrack[i].coords.latitude, gTrack[i].coords.longitude, |
| 383 | (i + 1 >= gTrack.length)); |
| 384 | } |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | function drawTrackPoint(aLatitude, aLongitude, lastPoint) { |
| 389 | var trackpoint = gps2xy(aLatitude, aLongitude); |
| 390 | // lastPoint is for optimizing (not actually executing the draw until the last) |
| 391 | trackpoint.optimized = (lastPoint === false); |
| 392 | var mappos = {x: Math.round((trackpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2), |
| 393 | y: Math.round((trackpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)}; |
| 394 | |
| 395 | if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) { |
| 396 | gTrackContext.strokeStyle = gTrackColor; |
| 397 | gTrackContext.fillStyle = gTrackContext.strokeStyle; |
| 398 | gTrackContext.lineWidth = gTrackWidth; |
| 399 | gTrackContext.lineCap = "round"; |
| 400 | gTrackContext.lineJoin = "round"; |
| 401 | } |
| 402 | if (!gLastDrawnPoint || gLastDrawnPoint == trackpoint) { |
| 403 | // This breaks optimiziation, so make sure to close path and reset optimization. |
| 404 | if (gLastDrawnPoint && gLastDrawnPoint.optimized) |
| 405 | gTrackContext.stroke(); |
| 406 | gTrackContext.beginPath(); |
| 407 | trackpoint.optimized = false; |
| 408 | gTrackContext.arc(mappos.x, mappos.y, |
| 409 | gTrackContext.lineWidth, 0, Math.PI * 2, false); |
| 410 | gTrackContext.fill(); |
| 411 | } |
| 412 | else { |
| 413 | if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) { |
| 414 | gTrackContext.beginPath(); |
| 415 | gTrackContext.moveTo(Math.round((gLastDrawnPoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2), |
| 416 | Math.round((gLastDrawnPoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)); |
| 417 | } |
| 418 | gTrackContext.lineTo(mappos.x, mappos.y); |
| 419 | if (!trackpoint.optimized) |
| 420 | gTrackContext.stroke(); |
| 421 | } |
| 422 | gLastDrawnPoint = trackpoint; |
| 423 | } |
| 424 | |
| 425 | function drawCurrentLocation(trackPoint) { |
| 426 | var locpoint = gps2xy(trackPoint.coords.latitude, trackPoint.coords.longitude); |
| 427 | var circleRadius = Math.round(gCurLocSize / 2); |
| 428 | var mappos = {x: Math.round((locpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2), |
| 429 | y: Math.round((locpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)}; |
| 430 | |
| 431 | undrawCurrentLocation(); |
| 432 | |
| 433 | // Cache overdrawn area. |
| 434 | gCurPosMapCache = |
| 435 | {point: locpoint, |
| 436 | radius: circleRadius, |
| 437 | data: gTrackContext.getImageData(mappos.x - circleRadius, |
| 438 | mappos.y - circleRadius, |
| 439 | circleRadius * 2, circleRadius * 2)}; |
| 440 | |
| 441 | gTrackContext.strokeStyle = gCurLocColor; |
| 442 | gTrackContext.fillStyle = gTrackContext.strokeStyle; |
| 443 | gTrackContext.beginPath(); |
| 444 | gTrackContext.arc(mappos.x, mappos.y, |
| 445 | circleRadius, 0, Math.PI * 2, false); |
| 446 | gTrackContext.fill(); |
| 447 | } |
| 448 | |
| 449 | function undrawCurrentLocation() { |
| 450 | if (gCurPosMapCache) { |
| 451 | var oldpoint = gCurPosMapCache.point; |
| 452 | var oldmp = {x: Math.round((oldpoint.x - gPos.x) / gZoomFactor + gMapCanvas.width / 2), |
| 453 | y: Math.round((oldpoint.y - gPos.y) / gZoomFactor + gMapCanvas.height / 2)}; |
| 454 | gTrackContext.putImageData(gCurPosMapCache.data, |
| 455 | oldmp.x - gCurPosMapCache.radius, |
| 456 | oldmp.y - gCurPosMapCache.radius); |
| 457 | gCurPosMapCache = undefined; |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | var mapEvHandler = { |
| 462 | handleEvent: function(aEvent) { |
| 463 | var touchEvent = aEvent.type.indexOf('touch') != -1; |
| 464 | |
| 465 | if (touchEvent) { |
| 466 | aEvent.stopPropagation(); |
| 467 | } |
| 468 | |
| 469 | // Bail out if the event is happening on an input. |
| 470 | if (aEvent.target.tagName.toLowerCase() == "input") |
| 471 | return; |
| 472 | |
| 473 | // Bail out on unwanted map moves, but not zoom or keyboard events. |
| 474 | if (aEvent.type.indexOf("mouse") === 0 || aEvent.type.indexOf("touch") === 0) { |
| 475 | // Bail out if this is neither a touch nor left-click. |
| 476 | if (!touchEvent && aEvent.button != 0) |
| 477 | return; |
| 478 | |
| 479 | // Bail out if the started touch can't be found. |
| 480 | if (touchEvent && gDragging && |
| 481 | !aEvent.changedTouches.identifiedTouch(gDragTouchID)) |
| 482 | return; |
| 483 | } |
| 484 | |
| 485 | var coordObj = touchEvent ? |
| 486 | aEvent.changedTouches.identifiedTouch(gDragTouchID) : |
| 487 | aEvent; |
| 488 | |
| 489 | switch (aEvent.type) { |
| 490 | case "mousedown": |
| 491 | case "touchstart": |
| 492 | if (touchEvent) { |
| 493 | if (aEvent.targetTouches.length == 2) { |
| 494 | gPinchStartWidth = Math.sqrt( |
| 495 | Math.pow(aEvent.targetTouches.item(1).clientX - |
| 496 | aEvent.targetTouches.item(0).clientX, 2) + |
| 497 | Math.pow(aEvent.targetTouches.item(1).clientY - |
| 498 | aEvent.targetTouches.item(0).clientY, 2) |
| 499 | ); |
| 500 | } |
| 501 | gDragTouchID = aEvent.changedTouches.item(0).identifier; |
| 502 | coordObj = aEvent.changedTouches.identifiedTouch(gDragTouchID); |
| 503 | } |
| 504 | var x = coordObj.clientX - gMapCanvas.offsetLeft; |
| 505 | var y = coordObj.clientY - gMapCanvas.offsetTop; |
| 506 | |
| 507 | if (touchEvent || aEvent.button === 0) { |
| 508 | gDragging = true; |
| 509 | } |
| 510 | gLastMouseX = x; |
| 511 | gLastMouseY = y; |
| 512 | showUI(); |
| 513 | break; |
| 514 | case "mousemove": |
| 515 | case "touchmove": |
| 516 | if (touchEvent && aEvent.targetTouches.length == 2) { |
| 517 | curPinchStartWidth = Math.sqrt( |
| 518 | Math.pow(aEvent.targetTouches.item(1).clientX - |
| 519 | aEvent.targetTouches.item(0).clientX, 2) + |
| 520 | Math.pow(aEvent.targetTouches.item(1).clientY - |
| 521 | aEvent.targetTouches.item(0).clientY, 2) |
| 522 | ); |
| 523 | if (!gPinchStartWidth) |
| 524 | gPinchStartWidth = curPinchStartWidth; |
| 525 | |
| 526 | if (gPinchStartWidth / curPinchStartWidth > 1.7 || |
| 527 | gPinchStartWidth / curPinchStartWidth < 0.6) { |
| 528 | var newZoomLevel = gPos.z + (gPinchStartWidth < curPinchStartWidth ? 1 : -1); |
| 529 | if ((newZoomLevel >= 0) && (newZoomLevel <= gMaxZoom)) { |
| 530 | // Calculate new center of the map - preserve middle of pinch. |
| 531 | // This means that pixel distance between old center and middle |
| 532 | // must equal pixel distance of new center and middle. |
| 533 | var x = (aEvent.targetTouches.item(1).clientX + |
| 534 | aEvent.targetTouches.item(0).clientX) / 2 - |
| 535 | gMapCanvas.offsetLeft; |
| 536 | var y = (aEvent.targetTouches.item(1).clientY + |
| 537 | aEvent.targetTouches.item(0).clientY) / 2 - |
| 538 | gMapCanvas.offsetTop; |
| 539 | |
| 540 | // Zoom factor after this action. |
| 541 | var newZoomFactor = Math.pow(2, gMaxZoom - newZoomLevel); |
| 542 | gPos.x -= (x - gMapCanvas.width / 2) * (newZoomFactor - gZoomFactor); |
| 543 | gPos.y -= (y - gMapCanvas.height / 2) * (newZoomFactor - gZoomFactor); |
| 544 | |
| 545 | if (gPinchStartWidth < curPinchStartWidth) |
| 546 | zoomIn(); |
| 547 | else |
| 548 | zoomOut(); |
| 549 | |
| 550 | // Reset pinch start width and start another pinch gesture. |
| 551 | gPinchStartWidth = null; |
| 552 | } |
| 553 | } |
| 554 | // If we are in a pinch, do not drag. |
| 555 | break; |
| 556 | } |
| 557 | var x = coordObj.clientX - gMapCanvas.offsetLeft; |
| 558 | var y = coordObj.clientY - gMapCanvas.offsetTop; |
| 559 | if (gDragging === true) { |
| 560 | var dX = x - gLastMouseX; |
| 561 | var dY = y - gLastMouseY; |
| 562 | gPos.x -= dX * gZoomFactor; |
| 563 | gPos.y -= dY * gZoomFactor; |
| 564 | if (true) { // use optimized path |
| 565 | var mapData = gMapContext.getImageData(0, 0, |
| 566 | gMapCanvas.width, |
| 567 | gMapCanvas.height); |
| 568 | gMapContext.clearRect(0, 0, gMapCanvas.width, gMapCanvas.height); |
| 569 | gMapContext.putImageData(mapData, dX, dY); |
| 570 | drawMap({left: (dX > 0) ? dX : 0, |
| 571 | right: (dX < 0) ? -dX : 0, |
| 572 | top: (dY > 0) ? dY : 0, |
| 573 | bottom: (dY < 0) ? -dY : 0}); |
| 574 | } |
| 575 | else { |
| 576 | drawMap(false, true); |
| 577 | } |
| 578 | showUI(); |
| 579 | } |
| 580 | gLastMouseX = x; |
| 581 | gLastMouseY = y; |
| 582 | break; |
| 583 | case "mouseup": |
| 584 | case "touchend": |
| 585 | gPinchStartWidth = null; |
| 586 | gDragging = false; |
| 587 | showUI(); |
| 588 | break; |
| 589 | case "mouseout": |
| 590 | case "touchcancel": |
| 591 | case "touchleave": |
| 592 | //gDragging = false; |
| 593 | break; |
| 594 | case "wheel": |
| 595 | // If we'd want pixels, we'd need to calc up using aEvent.deltaMode. |
| 596 | // See https://developer.mozilla.org/en-US/docs/Mozilla_event_reference/wheel |
| 597 | |
| 598 | // Only accept (non-null) deltaY values |
| 599 | if (!aEvent.deltaY) |
| 600 | break; |
| 601 | |
| 602 | // Debug output: "coordinates" of the point the mouse was over. |
| 603 | /* |
| 604 | var ptCoord = {x: gPos.x + (x - gMapCanvas.width / 2) * gZoomFactor, |
| 605 | y: gPos.y + (x - gMapCanvas.height / 2) * gZoomFactor}; |
| 606 | var gpsCoord = xy2gps(ptCoord.x, ptCoord.y); |
| 607 | var pt2Coord = gps2xy(gpsCoord.latitude, gpsCoord.longitude); |
| 608 | console.log(ptCoord.x + "/" + ptCoord.y + " - " + |
| 609 | gpsCoord.latitude + "/" + gpsCoord.longitude + " - " + |
| 610 | pt2Coord.x + "/" + pt2Coord.y); |
| 611 | */ |
| 612 | |
| 613 | var newZoomLevel = gPos.z + (aEvent.deltaY < 0 ? 1 : -1); |
| 614 | if ((newZoomLevel >= 0) && (newZoomLevel <= gMaxZoom)) { |
| 615 | // Calculate new center of the map - same point stays under the mouse. |
| 616 | // This means that the pixel distance between the old center and point |
| 617 | // must equal the pixel distance of the new center and that point. |
| 618 | var x = coordObj.clientX - gMapCanvas.offsetLeft; |
| 619 | var y = coordObj.clientY - gMapCanvas.offsetTop; |
| 620 | |
| 621 | // Zoom factor after this action. |
| 622 | var newZoomFactor = Math.pow(2, gMaxZoom - newZoomLevel); |
| 623 | gPos.x -= (x - gMapCanvas.width / 2) * (newZoomFactor - gZoomFactor); |
| 624 | gPos.y -= (y - gMapCanvas.height / 2) * (newZoomFactor - gZoomFactor); |
| 625 | |
| 626 | if (aEvent.deltaY < 0) |
| 627 | zoomIn(); |
| 628 | else |
| 629 | zoomOut(); |
| 630 | } |
| 631 | break; |
| 632 | case "keydown": |
| 633 | // Allow keyboard control to move and zoom the map. |
| 634 | // Should use aEvent.key instead of aEvent.which but needs bug 680830. |
| 635 | // See https://developer.mozilla.org/en-US/docs/DOM/Mozilla_event_reference/keydown |
| 636 | var dX = 0; |
| 637 | var dY = 0; |
| 638 | switch (aEvent.which) { |
| 639 | case 39: // right |
| 640 | dX = -gTileSize / 2; |
| 641 | break; |
| 642 | case 37: // left |
| 643 | dX = gTileSize / 2; |
| 644 | break; |
| 645 | case 38: // up |
| 646 | dY = gTileSize / 2; |
| 647 | break; |
| 648 | case 40: // down |
| 649 | dY = -gTileSize / 2; |
| 650 | break; |
| 651 | case 87: // w |
| 652 | case 107: // + (numpad) |
| 653 | case 171: // + (normal key) |
| 654 | zoomIn(); |
| 655 | break; |
| 656 | case 83: // s |
| 657 | case 109: // - (numpad) |
| 658 | case 173: // - (normal key) |
| 659 | zoomOut(); |
| 660 | break; |
| 661 | case 48: // 0 |
| 662 | case 49: // 1 |
| 663 | case 50: // 2 |
| 664 | case 51: // 3 |
| 665 | case 52: // 4 |
| 666 | case 53: // 5 |
| 667 | case 54: // 6 |
| 668 | case 55: // 7 |
| 669 | case 56: // 8 |
| 670 | zoomTo(aEvent.which - 38); |
| 671 | break; |
| 672 | case 57: // 9 |
| 673 | zoomTo(9); |
| 674 | break; |
| 675 | case 96: // 0 (numpad) |
| 676 | case 97: // 1 (numpad) |
| 677 | case 98: // 2 (numpad) |
| 678 | case 99: // 3 (numpad) |
| 679 | case 100: // 4 (numpad) |
| 680 | case 101: // 5 (numpad) |
| 681 | case 102: // 6 (numpad) |
| 682 | case 103: // 7 (numpad) |
| 683 | case 104: // 8 (numpad) |
| 684 | zoomTo(aEvent.which - 86); |
| 685 | break; |
| 686 | case 105: // 9 (numpad) |
| 687 | zoomTo(9); |
| 688 | break; |
| 689 | default: // not supported |
| 690 | console.log("key not supported: " + aEvent.which); |
| 691 | break; |
| 692 | } |
| 693 | |
| 694 | // Move if needed. |
| 695 | if (dX || dY) { |
| 696 | gPos.x -= dX * gZoomFactor; |
| 697 | gPos.y -= dY * gZoomFactor; |
| 698 | if (true) { // use optimized path |
| 699 | var mapData = gMapContext.getImageData(0, 0, |
| 700 | gMapCanvas.width, |
| 701 | gMapCanvas.height); |
| 702 | gMapContext.clearRect(0, 0, gMapCanvas.width, gMapCanvas.height); |
| 703 | gMapContext.putImageData(mapData, dX, dY); |
| 704 | drawMap({left: (dX > 0) ? dX : 0, |
| 705 | right: (dX < 0) ? -dX : 0, |
| 706 | top: (dY > 0) ? dY : 0, |
| 707 | bottom: (dY < 0) ? -dY : 0}); |
| 708 | } |
| 709 | else { |
| 710 | drawMap(false, true); |
| 711 | } |
| 712 | } |
| 713 | break; |
| 714 | } |
| 715 | } |
| 716 | }; |
| 717 | |
| 718 | var geofake = { |
| 719 | tracking: false, |
| 720 | lastPos: {x: undefined, y: undefined}, |
| 721 | watchPosition: function(aSuccessCallback, aErrorCallback, aPrefObject) { |
| 722 | this.tracking = true; |
| 723 | var watchCall = function() { |
| 724 | // calc new position in lat/lon degrees |
| 725 | // 90° on Earth surface are ~10,000 km at the equator, |
| 726 | // so try moving at most 10m at a time |
| 727 | if (geofake.lastPos.x) |
| 728 | geofake.lastPos.x += (Math.random() - .5) * 90 / 1000000 |
| 729 | else |
| 730 | geofake.lastPos.x = 48.208174 |
| 731 | if (geofake.lastPos.y) |
| 732 | geofake.lastPos.y += (Math.random() - .5) * 90 / 1000000 |
| 733 | else |
| 734 | geofake.lastPos.y = 16.373819 |
| 735 | aSuccessCallback({timestamp: Date.now(), |
| 736 | coords: {latitude: geofake.lastPos.x, |
| 737 | longitude: geofake.lastPos.y, |
| 738 | accuracy: 20}}); |
| 739 | if (geofake.tracking) |
| 740 | setTimeout(watchCall, 1000); |
| 741 | }; |
| 742 | setTimeout(watchCall, 1000); |
| 743 | return "foo"; |
| 744 | }, |
| 745 | clearWatch: function(aID) { |
| 746 | this.tracking = false; |
| 747 | } |
| 748 | } |
| 749 | |
| 750 | function setCentering(aCheckbox) { |
| 751 | if (gMapPrefsLoaded && mainDB) |
| 752 | gPrefs.set("center_map", aCheckbox.checked); |
| 753 | gCenterPosition = aCheckbox.checked; |
| 754 | } |
| 755 | |
| 756 | function setTracking(aCheckbox) { |
| 757 | if (gMapPrefsLoaded && mainDB) |
| 758 | gPrefs.set("tracking_enabled", aCheckbox.checked); |
| 759 | if (aCheckbox.checked) |
| 760 | startTracking(); |
| 761 | else |
| 762 | endTracking(); |
| 763 | } |
| 764 | |
| 765 | function startTracking() { |
| 766 | if (gGeolocation) { |
| 767 | gActionLabel.textContent = "Establishing Position"; |
| 768 | gAction.style.display = "block"; |
| 769 | gGeoWatchID = gGeolocation.watchPosition( |
| 770 | function(position) { |
| 771 | if (gActionLabel.textContent) { |
| 772 | gActionLabel.textContent = ""; |
| 773 | gAction.style.display = "none"; |
| 774 | } |
| 775 | // Coords spec: https://developer.mozilla.org/en/XPCOM_Interface_Reference/NsIDOMGeoPositionCoords |
| 776 | var tPoint = {time: position.timestamp, |
| 777 | coords: {latitude: position.coords.latitude, |
| 778 | longitude: position.coords.longitude, |
| 779 | altitude: position.coords.altitude, |
| 780 | accuracy: position.coords.accuracy, |
| 781 | altitudeAccuracy: position.coords.altitudeAccuracy, |
| 782 | heading: position.coords.heading, |
| 783 | speed: position.coords.speed}, |
| 784 | beginSegment: !gLastTrackPoint}; |
| 785 | // Only add point to track is accuracy is good enough. |
| 786 | if (tPoint.coords.accuracy < gMinTrackAccuracy) { |
| 787 | gLastTrackPoint = tPoint; |
| 788 | gTrack.push(tPoint); |
| 789 | try { gTrackStore.push(tPoint); } catch(e) {} |
| 790 | var redrawn = false; |
| 791 | if (gCenterPosition) { |
| 792 | var posCoord = gps2xy(position.coords.latitude, |
| 793 | position.coords.longitude); |
| 794 | if (Math.abs(gPos.x - posCoord.x) > gMapCanvas.width * gZoomFactor / 4 || |
| 795 | Math.abs(gPos.y - posCoord.y) > gMapCanvas.height * gZoomFactor / 4) { |
| 796 | gPos.x = posCoord.x; |
| 797 | gPos.y = posCoord.y; |
| 798 | drawMap(); // This draws the current point as well. |
| 799 | redrawn = true; |
| 800 | } |
| 801 | } |
| 802 | if (!redrawn) |
| 803 | undrawCurrentLocation(); |
| 804 | drawTrackPoint(position.coords.latitude, position.coords.longitude, true); |
| 805 | } |
| 806 | drawCurrentLocation(tPoint); |
| 807 | }, |
| 808 | function(error) { |
| 809 | // Ignore erros for the moment, but this is good for debugging. |
| 810 | // See https://developer.mozilla.org/en/Using_geolocation#Handling_errors |
| 811 | if (gDebug) |
| 812 | console.log(error.message); |
| 813 | }, |
| 814 | {enableHighAccuracy: true} |
| 815 | ); |
| 816 | } |
| 817 | } |
| 818 | |
| 819 | function endTracking() { |
| 820 | if (gActionLabel.textContent) { |
| 821 | gActionLabel.textContent = ""; |
| 822 | gAction.style.display = "none"; |
| 823 | } |
| 824 | if (gGeoWatchID) { |
| 825 | gGeolocation.clearWatch(gGeoWatchID); |
| 826 | } |
| 827 | } |
| 828 | |
| 829 | function clearTrack() { |
| 830 | gTrack = []; |
| 831 | gTrackStore.clear(); |
| 832 | drawTrack(); |
| 833 | } |
| 834 | |
| 835 | var gTileService = { |
| 836 | objStore: "tilecache", |
| 837 | |
| 838 | ageLimit: 14 * 86400 * 1000, // 2 weeks (in ms) |
| 839 | |
| 840 | get: function(aStyle, aCoords, aCallback) { |
| 841 | var norm = normalizeCoords(aCoords); |
| 842 | var dbkey = aStyle + "::" + norm.x + "," + norm.y + "," + norm.z; |
| 843 | this.getDBCache(dbkey, function(aResult, aEvent) { |
| 844 | if (aResult) { |
| 845 | // We did get a cached object. |
| 846 | aCallback(aResult.image, aStyle, aCoords); |
| 847 | // Look at the timestamp and return if it's not too old. |
| 848 | if (aResult.timestamp + gTileService.ageLimit > Date.now()) |
| 849 | return; |
| 850 | // Reload cached tile otherwise. |
| 851 | var oldDate = new Date(aResult.timestamp); |
| 852 | console.log("reload cached tile: " + dbkey + " - " + oldDate.toUTCString()); |
| 853 | } |
| 854 | // Retrieve image from the web and store it in the cache. |
| 855 | var XHR = new XMLHttpRequest(); |
| 856 | XHR.open("GET", |
| 857 | gMapStyles[aStyle].url |
| 858 | .replace("{x}", norm.x) |
| 859 | .replace("{y}", norm.y) |
| 860 | .replace("{z}", norm.z) |
| 861 | .replace("[a-c]", String.fromCharCode(97 + Math.floor(Math.random() * 2))) |
| 862 | .replace("[1-4]", 1 + Math.floor(Math.random() * 3)), |
| 863 | true); |
| 864 | XHR.responseType = "blob"; |
| 865 | XHR.addEventListener("load", function () { |
| 866 | if (XHR.status === 200) { |
| 867 | var blob = XHR.response; |
| 868 | aCallback(blob, aStyle, aCoords); |
| 869 | gTileService.setDBCache(dbkey, {image: blob, timestamp: Date.now()}); |
| 870 | } |
| 871 | }, false); |
| 872 | XHR.send(); |
| 873 | }); |
| 874 | }, |
| 875 | |
| 876 | getDBCache: function(aKey, aCallback) { |
| 877 | if (!mainDB) |
| 878 | return; |
| 879 | var transaction = mainDB.transaction([this.objStore]); |
| 880 | var request = transaction.objectStore(this.objStore).get(aKey); |
| 881 | request.onsuccess = function(event) { |
| 882 | aCallback(request.result, event); |
| 883 | }; |
| 884 | request.onerror = function(event) { |
| 885 | // Errors can be handled here. |
| 886 | aCallback(undefined, event); |
| 887 | }; |
| 888 | }, |
| 889 | |
| 890 | setDBCache: function(aKey, aValue, aCallback) { |
| 891 | if (!mainDB) |
| 892 | return; |
| 893 | var success = false; |
| 894 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 895 | var objStore = transaction.objectStore(this.objStore); |
| 896 | var request = objStore.put(aValue, aKey); |
| 897 | request.onsuccess = function(event) { |
| 898 | success = true; |
| 899 | if (aCallback) |
| 900 | aCallback(success, event); |
| 901 | }; |
| 902 | request.onerror = function(event) { |
| 903 | // Errors can be handled here. |
| 904 | if (aCallback) |
| 905 | aCallback(success, event); |
| 906 | }; |
| 907 | }, |
| 908 | |
| 909 | unsetDBCache: function(aKey, aCallback) { |
| 910 | if (!mainDB) |
| 911 | return; |
| 912 | var success = false; |
| 913 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 914 | var request = transaction.objectStore(this.objStore).delete(aKey); |
| 915 | request.onsuccess = function(event) { |
| 916 | success = true; |
| 917 | if (aCallback) |
| 918 | aCallback(success, event); |
| 919 | }; |
| 920 | request.onerror = function(event) { |
| 921 | // Errors can be handled here. |
| 922 | if (aCallback) |
| 923 | aCallback(success, event); |
| 924 | } |
| 925 | }, |
| 926 | |
| 927 | clearDB: function(aCallback) { |
| 928 | if (!mainDB) |
| 929 | return; |
| 930 | var success = false; |
| 931 | var transaction = mainDB.transaction([this.objStore], "readwrite"); |
| 932 | var request = transaction.objectStore(this.objStore).clear(); |
| 933 | request.onsuccess = function(event) { |
| 934 | success = true; |
| 935 | if (aCallback) |
| 936 | aCallback(success, event); |
| 937 | }; |
| 938 | request.onerror = function(event) { |
| 939 | // Errors can be handled here. |
| 940 | if (aCallback) |
| 941 | aCallback(success, event); |
| 942 | } |
| 943 | } |
| 944 | }; |