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>.'},
mapquest_aerial:
{name: "MapQuest Open Aerial",
- url: "http://oatile[1-4].mqcdn.com/tiles/1.0.0/sat/{z}/{x}/{y}.jpg",
+ url: "http://otile[1-4].mqcdn.com/tiles/1.0.0/sat/{z}/{x}/{y}.jpg",
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.'},
opengeoserver_arial:
{name: "OpenGeoServer Aerial",
var gLastMouseY = 0;
var gZoomFactor;
-// Used as an associative array.
-// The keys have to be strings, ours will be "xindex,yindex,zindex" e.g. "13,245,12".
-var gTiles = {};
var gLoadingTile;
var gMapPrefsLoaded = false;
var gDragging = false;
-var gDragTouchID;
+var gDragTouchID, gPinchStartWidth;
var gGeoWatchID;
var gTrack = [];
}
}
- var loopCnt = 0;
- var getPersistentPrefs = function() {
- if (mainDB) {
- gWaitCounter++;
- gPrefs.get("position", function(aValue) {
- if (aValue) {
- gPos = aValue;
- gWaitCounter--;
- }
- });
- gWaitCounter++;
- gPrefs.get("center_map", function(aValue) {
- if (aValue === undefined)
- document.getElementById("centerCheckbox").checked = true;
- else
- document.getElementById("centerCheckbox").checked = aValue;
- setCentering(document.getElementById("centerCheckbox"));
- gWaitCounter--;
- });
- gWaitCounter++;
- gPrefs.get("tracking_enabled", function(aValue) {
- if (aValue === undefined)
- document.getElementById("trackCheckbox").checked = true;
- else
- document.getElementById("trackCheckbox").checked = aValue;
- gWaitCounter--;
- });
- gWaitCounter++;
- gTrackStore.getList(function(aTPoints) {
- if (gDebug)
- document.getElementById("debug").textContent = aTPoints.length + " points loaded.";
- if (aTPoints.length) {
- gTrack = aTPoints;
+ console.log("map vars set, loading prefs...");
+ loadPrefs();
+}
+
+function loadPrefs(aEvent) {
+ if (aEvent && aEvent.type == "prefs-step") {
+ console.log("wait: " + gWaitCounter);
+ if (gWaitCounter == 0) {
+ gAction.removeEventListener(aEvent.type, loadPrefs, false);
+ gMapPrefsLoaded = true;
+ console.log("prefs loaded.");
+
+ gTrackCanvas.addEventListener("mouseup", mapEvHandler, false);
+ gTrackCanvas.addEventListener("mousemove", mapEvHandler, false);
+ gTrackCanvas.addEventListener("mousedown", mapEvHandler, false);
+ gTrackCanvas.addEventListener("mouseout", mapEvHandler, false);
+
+ gTrackCanvas.addEventListener("touchstart", mapEvHandler, false);
+ gTrackCanvas.addEventListener("touchmove", mapEvHandler, false);
+ gTrackCanvas.addEventListener("touchend", mapEvHandler, false);
+ gTrackCanvas.addEventListener("touchcancel", mapEvHandler, false);
+ gTrackCanvas.addEventListener("touchleave", mapEvHandler, false);
+
+ gTrackCanvas.addEventListener("wheel", mapEvHandler, false);
+
+ document.getElementById("body").addEventListener("keydown", mapEvHandler, false);
+
+ document.getElementById("copyright").innerHTML =
+ gMapStyles[gActiveMap].copyright;
+
+ gLoadingTile = new Image();
+ gLoadingTile.src = "style/loading.png";
+ gLoadingTile.onload = function() {
+ var throwEv = new CustomEvent("mapinit-done");
+ gAction.dispatchEvent(throwEv);
+ };
+ }
+ }
+ else {
+ if (aEvent)
+ gAction.removeEventListener(aEvent.type, loadPrefs, false);
+ gAction.addEventListener("prefs-step", loadPrefs, false);
+ gWaitCounter++;
+ gPrefs.get("position", function(aValue) {
+ if (aValue) {
+ gPos = aValue;
+ }
+ gWaitCounter--;
+ var throwEv = new CustomEvent("prefs-step");
+ gAction.dispatchEvent(throwEv);
+ });
+ gWaitCounter++;
+ gPrefs.get("center_map", function(aValue) {
+ if (aValue === undefined)
+ document.getElementById("centerCheckbox").checked = true;
+ else
+ document.getElementById("centerCheckbox").checked = aValue;
+ setCentering(document.getElementById("centerCheckbox"));
+ gWaitCounter--;
+ var throwEv = new CustomEvent("prefs-step");
+ gAction.dispatchEvent(throwEv);
+ });
+ gWaitCounter++;
+ gPrefs.get("tracking_enabled", function(aValue) {
+ if (aValue === undefined)
+ document.getElementById("trackCheckbox").checked = true;
+ else
+ document.getElementById("trackCheckbox").checked = aValue;
+ gWaitCounter--;
+ var throwEv = new CustomEvent("prefs-step");
+ gAction.dispatchEvent(throwEv);
+ });
+ gWaitCounter++;
+ var trackLoadStarted = false;
+ var redrawBase = 100;
+ gTrackStore.getListStepped(function(aTPoint) {
+ if (aTPoint) {
+ // Add in front and return new length.
+ var tracklen = gTrack.unshift(aTPoint);
+ // Redraw track periodically, larger distance the longer it gets.
+ // Initial paint will do initial track drawing.
+ if (tracklen % redrawBase == 0) {
+ drawTrack();
+ redrawBase = tracklen;
}
+ }
+ else {
+ // Last point received.
+ drawTrack();
+ }
+ if (!trackLoadStarted) {
+ // We have the most recent point, if present, rest will load async.
+ trackLoadStarted = true;
gWaitCounter--;
- });
- }
- else
- setTimeout(getPersistentPrefs, 100);
- loopCnt++;
- if (loopCnt > 50) {
- document.getElementById("debug").textContent = "Loading prefs failed.";
- }
- };
- getPersistentPrefs();
-
- gTrackCanvas.addEventListener("mouseup", mapEvHandler, false);
- gTrackCanvas.addEventListener("mousemove", mapEvHandler, false);
- gTrackCanvas.addEventListener("mousedown", mapEvHandler, false);
- gTrackCanvas.addEventListener("mouseout", mapEvHandler, false);
-
- gTrackCanvas.addEventListener("touchstart", mapEvHandler, false);
- gTrackCanvas.addEventListener("touchmove", mapEvHandler, false);
- gTrackCanvas.addEventListener("touchend", mapEvHandler, false);
- gTrackCanvas.addEventListener("touchcancel", mapEvHandler, false);
- gTrackCanvas.addEventListener("touchleave", mapEvHandler, false);
-
- // XXX deprecated? see https://groups.google.com/forum/?fromgroups#!topic/mozilla.dev.planning/kuhrORubaRY[1-25]
- gTrackCanvas.addEventListener("DOMMouseScroll", mapEvHandler, false);
- gTrackCanvas.addEventListener("mousewheel", mapEvHandler, false);
-
- document.getElementById("copyright").innerHTML =
- gMapStyles[gActiveMap].copyright;
-
- gLoadingTile = new Image();
- gLoadingTile.src = "style/loading.png";
- gWaitCounter++;
- gLoadingTile.onload = function() { gWaitCounter--; };
+ var throwEv = new CustomEvent("prefs-step");
+ gAction.dispatchEvent(throwEv);
+ }
+ });
+ }
}
function resizeAndDraw() {
var viewportWidth = Math.min(window.innerWidth, window.outerWidth);
var viewportHeight = Math.min(window.innerHeight, window.outerHeight);
-
- gMapCanvas.width = viewportWidth;
- gMapCanvas.height = viewportHeight;
- gTrackCanvas.width = viewportWidth;
- gTrackCanvas.height = viewportHeight;
- drawMap();
- showUI();
+ if (gMapCanvas && gTrackCanvas) {
+ gMapCanvas.width = viewportWidth;
+ gMapCanvas.height = viewportHeight;
+ gTrackCanvas.width = viewportWidth;
+ gTrackCanvas.height = viewportHeight;
+ drawMap();
+ showUI();
+ }
}
+// Using scale(x, y) together with drawing old data on scaled canvas would be an improvement for zooming.
+// See https://developer.mozilla.org/en-US/docs/Canvas_tutorial/Transformations#Scaling
+
function zoomIn() {
if (gPos.z < gMaxZoom) {
gPos.z++;
}
}
+function zoomTo(aTargetLevel) {
+ aTargetLevel = parseInt(aTargetLevel);
+ if (aTargetLevel >= 0 && aTargetLevel <= gMaxZoom) {
+ gPos.z = aTargetLevel;
+ drawMap();
+ }
+}
+
function gps2xy(aLatitude, aLongitude) {
var maxZoomFactor = Math.pow(2, gMaxZoom) * gTileSize;
var convLat = aLatitude * Math.PI / 180;
var mapSel = document.getElementById("mapSelector");
if (mapSel.selectedIndex >= 0 && gActiveMap != mapSel.value) {
gActiveMap = mapSel.value;
- gTiles = {};
document.getElementById("copyright").innerHTML =
gMapStyles[gActiveMap].copyright;
showUI();
return {x: ind[0], y: ind[1], z: ind[2]};
}
-function drawMap() {
- // Go through all the currently loaded tiles. If we don't want any of them remove them.
- // for (t in gTiles) {
- // if (isOutsideWindow(t))
- // delete gTiles[t];
- // }
+function drawMap(aPixels, aOverdraw) {
+ // aPixels is an object with left/right/top/bottom members telling how many
+ // pixels on the borders should actually be drawn.
+ // aOverdraw is a bool that tells if we should draw placeholders or draw
+ // straight over the existing content.
+ if (!aPixels)
+ aPixels = {left: gMapCanvas.width, right: gMapCanvas.width,
+ top: gMapCanvas.height, bottom: gMapCanvas.height};
+ if (!aOverdraw)
+ aOverdraw = false;
+
document.getElementById("zoomLevel").textContent = gPos.z;
gZoomFactor = Math.pow(2, gMaxZoom - gPos.z);
var wid = gMapCanvas.width * gZoomFactor; // Width in level 18 pixels.
if (gMapPrefsLoaded && mainDB)
gPrefs.set("position", gPos);
- // Go through all the tiles we want.
- // If any of them aren't loaded or being loaded, do so.
+ var tiles = {left: Math.ceil((xMin + aPixels.left * gZoomFactor) / size) -
+ (aPixels.left ? 0 : 1),
+ right: Math.floor((xMax - aPixels.right * gZoomFactor) / size) -
+ (aPixels.right ? 1 : 0),
+ top: Math.ceil((yMin + aPixels.top * gZoomFactor) / size) -
+ (aPixels.top ? 0 : 1),
+ bottom: Math.floor((yMax - aPixels.bottom * gZoomFactor) / size) -
+ (aPixels.bottom ? 1 : 0)};
+
+ // Go through all the tiles in the map, find out if to draw them and do so.
for (var x = Math.floor(xMin / size); x < Math.ceil(xMax / size); x++) {
for (var y = Math.floor(yMin / size); y < Math.ceil(yMax / size); y++) { // slow script warnings on the tablet appear here!
- // Round here is **CRUCIAL** otherwise the images are filtered
- // and the performance sucks (more than expected).
- var xoff = Math.round((x * size - xMin) / gZoomFactor);
- var yoff = Math.round((y * size - yMin) / gZoomFactor);
- // Draw placeholder, and then initiate loading/drawing of real one.
- gMapContext.drawImage(gLoadingTile, xoff, yoff);
-
- gTileService.get(gActiveMap, {x: x, y: y, z: gPos.z}, function(aImage, aStyle, aCoords) {
- // Only draw if this applies for the current view.
- if ((aStyle == gActiveMap) && (aCoords.z == gPos.z)) {
- var ixMin = gPos.x - wid / 2;
- var iyMin = gPos.y - ht / 2;
- var ixoff = Math.round((aCoords.x * size - ixMin) / gZoomFactor);
- var iyoff = Math.round((aCoords.y * size - iyMin) / gZoomFactor);
- // Would be nice to draw directly from the blob, but that crashes:
- // gMapContext.drawImage(aImage, ixoff, iyoff);
- var URL = window.URL;
- var imgURL = URL.createObjectURL(aImage);
- var imgObj = new Image();
- imgObj.src = imgURL;
- imgObj.onload = function() {
- gMapContext.drawImage(imgObj, ixoff, iyoff);
- URL.revokeObjectURL(imgURL);
+ // Only go to the drawing step if we need to draw this tile.
+ if (x < tiles.left || x > tiles.right ||
+ y < tiles.top || y > tiles.bottom) {
+ // Round here is **CRUCIAL** otherwise the images are filtered
+ // and the performance sucks (more than expected).
+ var xoff = Math.round((x * size - xMin) / gZoomFactor);
+ var yoff = Math.round((y * size - yMin) / gZoomFactor);
+ // Draw placeholder tile unless we overdraw.
+ if (!aOverdraw &&
+ (x < tiles.left -1 || x > tiles.right + 1 ||
+ y < tiles.top -1 || y > tiles.bottom + 1))
+ gMapContext.drawImage(gLoadingTile, xoff, yoff);
+
+ // Initiate loading/drawing of the actual tile.
+ gTileService.get(gActiveMap, {x: x, y: y, z: gPos.z},
+ function(aImage, aStyle, aCoords) {
+ // Only draw if this applies for the current view.
+ if ((aStyle == gActiveMap) && (aCoords.z == gPos.z)) {
+ var ixMin = gPos.x - wid / 2;
+ var iyMin = gPos.y - ht / 2;
+ var ixoff = Math.round((aCoords.x * size - ixMin) / gZoomFactor);
+ var iyoff = Math.round((aCoords.y * size - iyMin) / gZoomFactor);
+ var URL = window.URL;
+ var imgURL = URL.createObjectURL(aImage);
+ var imgObj = new Image();
+ imgObj.src = imgURL;
+ imgObj.onload = function() {
+ gMapContext.drawImage(imgObj, ixoff, iyoff);
+ URL.revokeObjectURL(imgURL);
+ }
}
- }
- });
+ });
+ }
}
}
+ drawTrack();
+}
+
+function drawTrack() {
gLastDrawnPoint = null;
gCurPosMapCache = undefined;
gTrackContext.clearRect(0, 0, gTrackCanvas.width, gTrackCanvas.height);
handleEvent: function(aEvent) {
var touchEvent = aEvent.type.indexOf('touch') != -1;
- // Bail out on unwanted map moves, but not zoom-changing events.
- if (aEvent.type != "DOMMouseScroll" && aEvent.type != "mousewheel") {
+ // Bail out if the event is happening on an input.
+ if (aEvent.target.tagName.toLowerCase() == "input")
+ return;
+
+ // Bail out on unwanted map moves, but not zoom or keyboard events.
+ if (aEvent.type.indexOf("mouse") === 0 || aEvent.type.indexOf("touch") === 0) {
// Bail out if this is neither a touch nor left-click.
if (!touchEvent && aEvent.button != 0)
return;
case "mousedown":
case "touchstart":
if (touchEvent) {
+ if (aEvent.targetTouches.length == 2) {
+ gPinchStartWidth = Math.sqrt(
+ Math.pow(aEvent.targetTouches.item(1).clientX -
+ aEvent.targetTouches.item(0).clientX, 2) +
+ Math.pow(aEvent.targetTouches.item(1).clientY -
+ aEvent.targetTouches.item(0).clientY, 2)
+ );
+ }
gDragTouchID = aEvent.changedTouches.item(0).identifier;
coordObj = aEvent.changedTouches.identifiedTouch(gDragTouchID);
}
break;
case "mousemove":
case "touchmove":
+ if (touchEvent && aEvent.targetTouches.length == 2) {
+ curPinchStartWidth = Math.sqrt(
+ Math.pow(aEvent.targetTouches.item(1).clientX -
+ aEvent.targetTouches.item(0).clientX, 2) +
+ Math.pow(aEvent.targetTouches.item(1).clientY -
+ aEvent.targetTouches.item(0).clientY, 2)
+ );
+ if (!gPinchStartWidth)
+ gPinchStartWidth = curPinchStartWidth;
+
+ if (gPinchStartWidth / curPinchStartWidth > 1.7 ||
+ gPinchStartWidth / curPinchStartWidth < 0.6) {
+ var newZoomLevel = gPos.z + (gPinchStartWidth < curPinchStartWidth ? 1 : -1);
+ if ((newZoomLevel >= 0) && (newZoomLevel <= gMaxZoom)) {
+ // Calculate new center of the map - preserve middle of pinch.
+ // This means that pixel distance between old center and middle
+ // must equal pixel distance of new center and middle.
+ var x = (aEvent.targetTouches.item(1).clientX +
+ aEvent.targetTouches.item(0).clientX) / 2 -
+ gMapCanvas.offsetLeft;
+ var y = (aEvent.targetTouches.item(1).clientY +
+ aEvent.targetTouches.item(0).clientY) / 2 -
+ gMapCanvas.offsetTop;
+
+ // Zoom factor after this action.
+ var newZoomFactor = Math.pow(2, gMaxZoom - newZoomLevel);
+ gPos.x -= (x - gMapCanvas.width / 2) * (newZoomFactor - gZoomFactor);
+ gPos.y -= (y - gMapCanvas.height / 2) * (newZoomFactor - gZoomFactor);
+
+ if (gPinchStartWidth < curPinchStartWidth)
+ zoomIn();
+ else
+ zoomOut();
+
+ // Reset pinch start width and start another pinch gesture.
+ gPinchStartWidth = null;
+ }
+ }
+ // If we are in a pinch, do not drag.
+ break;
+ }
var x = coordObj.clientX - gMapCanvas.offsetLeft;
var y = coordObj.clientY - gMapCanvas.offsetTop;
if (gDragging === true) {
var dY = y - gLastMouseY;
gPos.x -= dX * gZoomFactor;
gPos.y -= dY * gZoomFactor;
- drawMap();
+ if (true) { // use optimized path
+ var mapData = gMapContext.getImageData(0, 0,
+ gMapCanvas.width,
+ gMapCanvas.height);
+ gMapContext.clearRect(0, 0, gMapCanvas.width, gMapCanvas.height);
+ gMapContext.putImageData(mapData, dX, dY);
+ drawMap({left: (dX > 0) ? dX : 0,
+ right: (dX < 0) ? -dX : 0,
+ top: (dY > 0) ? dY : 0,
+ bottom: (dY < 0) ? -dY : 0});
+ }
+ else {
+ drawMap(false, true);
+ }
showUI();
}
gLastMouseX = x;
break;
case "mouseup":
case "touchend":
+ gPinchStartWidth = null;
gDragging = false;
showUI();
break;
case "touchleave":
//gDragging = false;
break;
- case "DOMMouseScroll":
- case "mousewheel":
- var delta = 0;
- if (aEvent.wheelDelta) {
- delta = aEvent.wheelDelta / 120;
- if (window.opera)
- delta = -delta;
- }
- else if (aEvent.detail) {
- delta = -aEvent.detail / 3;
- }
+ case "wheel":
+ // If we'd want pixels, we'd need to calc up using aEvent.deltaMode.
+ // See https://developer.mozilla.org/en-US/docs/Mozilla_event_reference/wheel
+
+ // Only accept (non-null) deltaY values
+ if (!aEvent.deltaY)
+ break;
// Debug output: "coordinates" of the point the mouse was over.
/*
y: gPos.y + (x - gMapCanvas.height / 2) * gZoomFactor};
var gpsCoord = xy2gps(ptCoord.x, ptCoord.y);
var pt2Coord = gps2xy(gpsCoord.latitude, gpsCoord.longitude);
- document.getElementById("debug").textContent =
- ptCoord.x + "/" + ptCoord.y + " - " +
- gpsCoord.latitude + "/" + gpsCoord.longitude + " - " +
- pt2Coord.x + "/" + pt2Coord.y;
+ console.log(ptCoord.x + "/" + ptCoord.y + " - " +
+ gpsCoord.latitude + "/" + gpsCoord.longitude + " - " +
+ pt2Coord.x + "/" + pt2Coord.y);
*/
- var newZoomLevel = gPos.z + (delta > 0 ? 1 : -1);
+ var newZoomLevel = gPos.z + (aEvent.deltaY < 0 ? 1 : -1);
if ((newZoomLevel >= 0) && (newZoomLevel <= gMaxZoom)) {
// Calculate new center of the map - same point stays under the mouse.
// This means that the pixel distance between the old center and point
gPos.x -= (x - gMapCanvas.width / 2) * (newZoomFactor - gZoomFactor);
gPos.y -= (y - gMapCanvas.height / 2) * (newZoomFactor - gZoomFactor);
- if (delta > 0)
+ if (aEvent.deltaY < 0)
zoomIn();
- else if (delta < 0)
+ else
zoomOut();
}
break;
+ case "keydown":
+ // Allow keyboard control to move and zoom the map.
+ // Should use aEvent.key instead of aEvent.which but needs bug 680830.
+ // See https://developer.mozilla.org/en-US/docs/DOM/Mozilla_event_reference/keydown
+ var dX = 0;
+ var dY = 0;
+ switch (aEvent.which) {
+ case 39: // right
+ dX = -gTileSize / 2;
+ break;
+ case 37: // left
+ dX = gTileSize / 2;
+ break;
+ case 38: // up
+ dY = gTileSize / 2;
+ break;
+ case 40: // down
+ dY = -gTileSize / 2;
+ break;
+ case 87: // w
+ case 107: // + (numpad)
+ case 171: // + (normal key)
+ zoomIn();
+ break;
+ case 83: // s
+ case 109: // - (numpad)
+ case 173: // - (normal key)
+ zoomOut();
+ break;
+ case 48: // 0
+ case 49: // 1
+ case 50: // 2
+ case 51: // 3
+ case 52: // 4
+ case 53: // 5
+ case 54: // 6
+ case 55: // 7
+ case 56: // 8
+ zoomTo(aEvent.which - 38);
+ break;
+ case 57: // 9
+ zoomTo(9);
+ break;
+ case 96: // 0 (numpad)
+ case 97: // 1 (numpad)
+ case 98: // 2 (numpad)
+ case 99: // 3 (numpad)
+ case 100: // 4 (numpad)
+ case 101: // 5 (numpad)
+ case 102: // 6 (numpad)
+ case 103: // 7 (numpad)
+ case 104: // 8 (numpad)
+ zoomTo(aEvent.which - 86);
+ break;
+ case 105: // 9 (numpad)
+ zoomTo(9);
+ break;
+ default: // not supported
+ console.log("key not supported: " + aEvent.which);
+ break;
+ }
+
+ // Move if needed.
+ if (dX || dY) {
+ gPos.x -= dX * gZoomFactor;
+ gPos.y -= dY * gZoomFactor;
+ if (true) { // use optimized path
+ var mapData = gMapContext.getImageData(0, 0,
+ gMapCanvas.width,
+ gMapCanvas.height);
+ gMapContext.clearRect(0, 0, gMapCanvas.width, gMapCanvas.height);
+ gMapContext.putImageData(mapData, dX, dY);
+ drawMap({left: (dX > 0) ? dX : 0,
+ right: (dX < 0) ? -dX : 0,
+ top: (dY > 0) ? dY : 0,
+ bottom: (dY < 0) ? -dY : 0});
+ }
+ else {
+ drawMap(false, true);
+ }
+ }
+ break;
}
}
};
function startTracking() {
if (gGeolocation) {
+ gActionLabel.textContent = "Establishing Position";
+ gAction.style.display = "block";
gGeoWatchID = gGeolocation.watchPosition(
function(position) {
+ if (gActionLabel.textContent) {
+ gActionLabel.textContent = "";
+ gAction.style.display = "none";
+ }
// Coords spec: https://developer.mozilla.org/en/XPCOM_Interface_Reference/NsIDOMGeoPositionCoords
var tPoint = {time: position.timestamp,
coords: {latitude: position.coords.latitude,
function(error) {
// Ignore erros for the moment, but this is good for debugging.
// See https://developer.mozilla.org/en/Using_geolocation#Handling_errors
- document.getElementById("debug").textContent = error.message;
+ if (gDebug)
+ console.log(error.message);
},
{enableHighAccuracy: true}
);
}
function endTracking() {
+ if (gActionLabel.textContent) {
+ gActionLabel.textContent = "";
+ gAction.style.display = "none";
+ }
if (gGeoWatchID) {
gGeolocation.clearWatch(gGeoWatchID);
}
function clearTrack() {
gTrack = [];
gTrackStore.clear();
- drawMap();
+ drawTrack();
}
var gTileService = {
objStore: "tilecache",
+ ageLimit: 14 * 86400 * 1000, // 2 weeks (in ms)
+
get: function(aStyle, aCoords, aCallback) {
var norm = normalizeCoords(aCoords);
var dbkey = aStyle + "::" + norm.x + "," + norm.y + "," + norm.z;
this.getDBCache(dbkey, function(aResult, aEvent) {
if (aResult) {
// We did get a cached object.
- // TODO: Look at the timestamp and trigger a reload when it's too old.
aCallback(aResult.image, aStyle, aCoords);
+ // Look at the timestamp and return if it's not too old.
+ if (aResult.timestamp + gTileService.ageLimit > Date.now())
+ return;
+ // Reload cached tile otherwise.
+ var oldDate = new Date(aResult.timestamp);
+ console.log("reload cached tile: " + dbkey + " - " + oldDate.toUTCString());
}
- else {
- // Retrieve image from the web and store it in the cache.
- var XHR = new XMLHttpRequest();
- XHR.open("GET",
- gMapStyles[aStyle].url
- .replace("{x}", norm.x)
- .replace("{y}", norm.y)
- .replace("{z}", norm.z)
- .replace("[a-c]", String.fromCharCode(97 + Math.floor(Math.random() * 2)))
- .replace("[1-4]", 1 + Math.floor(Math.random() * 3)),
- true);
- XHR.responseType = "blob";
- XHR.addEventListener("load", function () {
- if (XHR.status === 200) {
- var blob = XHR.response;
- gTileService.setDBCache(dbkey, {image: blob, timestamp: Date.now()});
- aCallback(blob, aStyle, aCoords);
- }
- }, false);
- XHR.send();
- }
+ // Retrieve image from the web and store it in the cache.
+ var XHR = new XMLHttpRequest();
+ XHR.open("GET",
+ gMapStyles[aStyle].url
+ .replace("{x}", norm.x)
+ .replace("{y}", norm.y)
+ .replace("{z}", norm.z)
+ .replace("[a-c]", String.fromCharCode(97 + Math.floor(Math.random() * 2)))
+ .replace("[1-4]", 1 + Math.floor(Math.random() * 3)),
+ true);
+ XHR.responseType = "blob";
+ XHR.addEventListener("load", function () {
+ if (XHR.status === 200) {
+ var blob = XHR.response;
+ aCallback(blob, aStyle, aCoords);
+ gTileService.setDBCache(dbkey, {image: blob, timestamp: Date.now()});
+ }
+ }, false);
+ XHR.send();
});
},
if (aCallback)
aCallback(success, event);
}
+ },
+
+ clearDB: function(aCallback) {
+ if (!mainDB)
+ return;
+ var success = false;
+ var transaction = mainDB.transaction([this.objStore], "readwrite");
+ var request = transaction.objectStore(this.objStore).clear();
+ request.onsuccess = function(event) {
+ success = true;
+ if (aCallback)
+ aCallback(success, event);
+ };
+ request.onerror = function(event) {
+ // Errors can be handled here.
+ if (aCallback)
+ aCallback(success, event);
+ }
}
};
projects / lantea.git / blobdiff