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;
gWaitCounter++;
gTrackStore.getList(function(aTPoints) {
if (gDebug)
- document.getElementById("debug").textContent = aTPoints.length + " points loaded.";
+ console.log(aTPoints.length + " points loaded.");
if (aTPoints.length) {
gTrack = aTPoints;
}
setTimeout(getPersistentPrefs, 100);
loopCnt++;
if (loopCnt > 50) {
- document.getElementById("debug").textContent = "Loading prefs failed.";
+ console.log("Loading prefs failed.");
}
};
getPersistentPrefs();
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++;
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 ((a % b) + b) % b;
}
-function normaliseIndices(x, y, z) {
- var zoomFactor = Math.pow(2, z);
- return {x: mod(x, zoomFactor),
- y: mod(y, zoomFactor),
- z: z};
-}
-
-function tileURL(x, y, z) {
- var norm = normaliseIndices(x, y, z);
- return gMapStyles[gActiveMap].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));
+function normalizeCoords(aCoords) {
+ var zoomFactor = Math.pow(2, aCoords.z);
+ return {x: mod(aCoords.x, zoomFactor),
+ y: mod(aCoords.y, zoomFactor),
+ z: aCoords.z};
}
// Returns true if the tile is outside the current view.
}
function encodeIndex(x, y, z) {
- var norm = normaliseIndices(x, y, z);
+ var norm = normalizeCoords({x: x, y: y, z: z});
return norm.x + "," + norm.y + "," + norm.z;
}
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);
- var tileKey = encodeIndex(x, y, gPos.z);
- if (gTiles[tileKey] && gTiles[tileKey].complete) {
- gMapContext.drawImage(gTiles[tileKey], xoff, yoff);
- }
- else {
- // Draw placeholder, and then initiate loading/drawing of real one.
- gMapContext.drawImage(gLoadingTile, xoff, yoff);
- if (!gTiles[tileKey]) {
- gTiles[tileKey] = new Image();
- // Use alt field to communicate info to .onload.
- gTiles[tileKey].alt = gPos.z + ":" + xoff + ":" + yoff;
- gTiles[tileKey].src = tileURL(x, y, gPos.z);
- gTiles[tileKey].onload = function() {
- var tdata = this.alt.split(":", 3);
- // Draw the tile if we're still looking at the same zoom.
- if (tdata[0] == gPos.z) {
- gMapContext.drawImage(this, tdata[1], tdata[2]);
+ // 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);
}
- this.alt = "";
}
- }
- else {
- // Update position to draw this image to when loaded.
- gTiles[tileKey].alt = gPos.z + ":" + xoff + ":" + yoff;
- }
+ });
}
}
}
var dY = y - gLastMouseY;
gPos.x -= dX * gZoomFactor;
gPos.y -= dY * gZoomFactor;
- drawMap();
+ 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});
showUI();
}
gLastMouseX = x;
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);
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);
}
gTrackStore.clear();
drawMap();
}
+
+var gTileService = {
+ objStore: "tilecache",
+
+ 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);
+ }
+ 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();
+ }
+ });
+ },
+
+ getDBCache: function(aKey, aCallback) {
+ if (!mainDB)
+ return;
+ var transaction = mainDB.transaction([this.objStore]);
+ var request = transaction.objectStore(this.objStore).get(aKey);
+ request.onsuccess = function(event) {
+ aCallback(request.result, event);
+ };
+ request.onerror = function(event) {
+ // Errors can be handled here.
+ aCallback(undefined, event);
+ };
+ },
+
+ setDBCache: function(aKey, aValue, aCallback) {
+ if (!mainDB)
+ return;
+ var success = false;
+ var transaction = mainDB.transaction([this.objStore], "readwrite");
+ var objStore = transaction.objectStore(this.objStore);
+ var request = objStore.put(aValue, aKey);
+ 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);
+ };
+ },
+
+ unsetDBCache: function(aKey, aCallback) {
+ if (!mainDB)
+ return;
+ var success = false;
+ var transaction = mainDB.transaction([this.objStore], "readwrite");
+ var request = transaction.objectStore(this.objStore).delete(aKey);
+ 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