Added most big cities, rulers, and zoomify

public/js/leaflet-zoomify.min.js

@@ -0,0 +1,130 @@
+/*
+ * L.TileLayer.Zoomify display Zoomify tiles with Leaflet
+ *
+ * Based on the Leaflet.Zoomify (https://github.com/turban/Leaflet.Zoomify)
+ * from turban (https://github.com/turban)
+ *
+ */
+
+L.TileLayer.Zoomify = L.TileLayer.extend({
+	options: {
+		width: -1, // Must be set by user, max zoom image width
+		height: -1, // Must be set by user, max zoom image height
+		tileGroupPrefix: 'TileGroup',
+		tilesPerTileGroup: 256
+	},
+
+	initialize: function (url, options) {
+		L.TileLayer.prototype.initialize.call(this, url, options);
+
+		// Replace with automatic loading from ImageProperties.xml
+		if (this.options.width < 0 || this.options.height < 0) {
+			throw new Error('The user must set the Width and Height of the Zoomify image');
+		}
+	},
+
+	beforeAdd: function (map) {
+		var imageSize = L.point(this.options.width, this.options.height);
+
+		// Build the zoom sizes of the pyramid and cache them in an array
+		this._imageSize = [imageSize];
+		this._gridSize = [this._getGridSize(imageSize)];
+
+		// Register the image size in pixels and the grid size in # of tiles for each zoom level
+		while (imageSize.x > this.options.tileSize || imageSize.y > this.options.tileSize) {
+			imageSize = imageSize.divideBy(2).ceil();
+			this._imageSize.push(imageSize);
+			this._gridSize.push(this._getGridSize(imageSize));
+		}
+
+		// We built the cache from bottom to top, but leaflet uses a top to bottom index for the zoomlevel,
+		// so reverse it for easy indexing by current zoomlevel
+		this._imageSize.reverse();
+		this._gridSize.reverse();
+
+		// Register our max supported zoom level
+		var maxNativeZoom = this._gridSize.length - 1;
+		this.options.maxNativeZoom = maxNativeZoom;
+
+		// Register our bounds for this zoomify layer based on the maximum zoom
+		var maxZoomGrid = this._gridSize[maxNativeZoom],
+		maxX = maxZoomGrid.x * this.options.tileSize,
+		maxY = maxZoomGrid.y * this.options.tileSize,
+		southEast = map.unproject([maxX, maxY], maxNativeZoom);
+		this.options.bounds = new L.LatLngBounds([[0, 0], southEast]);
+
+		L.TileLayer.prototype.beforeAdd.call(this, map);
+	},
+
+	// Calculate the grid size for a given image size (based on tile size)
+	_getGridSize: function (imageSize) {
+		var tileSize = this.options.tileSize;
+		return L.point(Math.ceil(imageSize.x / tileSize), Math.ceil(imageSize.y / tileSize));
+	},
+
+	// Extend the add tile function to update our arbitrary sized border tiles
+	_addTile: function (coords, container) {
+		// Load the tile via the original leaflet code
+		L.TileLayer.prototype._addTile.call(this, coords, container);
+
+		// Get out imagesize in pixels for this zoom level and our grid size
+		var imageSize = this._imageSize[this._getZoomForUrl()],
+		    gridSize = this._gridSize[this._getZoomForUrl()];
+
+		// The real tile size (default:256) and the display tile size (if zoom > maxNativeZoom)
+		var realTileSize = L.GridLayer.prototype.getTileSize.call(this),
+		    displayTileSize = L.TileLayer.prototype.getTileSize.call(this);
+
+		// Get the current tile to adjust
+		var key = this._tileCoordsToKey(coords),
+		    tile = this._tiles[key].el;
+
+		// Calculate the required size of the border tiles
+		var scaleFactor = L.point(	(imageSize.x % realTileSize.x),
+									(imageSize.y % realTileSize.y)).unscaleBy(realTileSize);
+
+		// Update tile dimensions if we are on a border
+		if ((imageSize.x % realTileSize.x) > 0 && coords.x === gridSize.x - 1) {
+			tile.style.width = displayTileSize.scaleBy(scaleFactor).x + 'px';
+		}
+
+		if ((imageSize.y % realTileSize.y) > 0 && coords.y === gridSize.y - 1) {
+			tile.style.height = displayTileSize.scaleBy(scaleFactor).y + 'px';
+		}
+	},
+
+	// Construct the tile url, by inserting our tilegroup before we template the url
+	getTileUrl: function (coords) {
+		// Set our TileGroup variable, and then let the original tile templater do the work
+		this.options.g = this.options.tileGroupPrefix + this._getTileGroup(coords);
+
+		// Call the original templater
+		return L.TileLayer.prototype.getTileUrl.call(this, coords);
+	},
+
+	// Calculates the TileGroup number, each group contains 256 tiles. The tiles are stored from topleft to bottomright
+	_getTileGroup: function (coords) {
+		var zoom = this._getZoomForUrl(),
+		    num = 0,
+		    gridSize;
+
+		// Get the total number of tiles from the lowest zoom level to our zoomlevel
+		for (var z = 0; z < zoom; z++) {
+			gridSize = this._gridSize[z];
+			num += gridSize.x * gridSize.y;
+		}
+
+		// Add the remaining tiles from this zoom layer to the running total of tiles
+		num += coords.y * this._gridSize[zoom].x + coords.x;
+		return Math.floor(num / this.options.tilesPerTileGroup);
+	},
+
+	getBounds: function () {
+		return this.options.bounds;
+	}
+
+});
+
+L.tileLayer.zoomify = function (url, options) {
+	return new L.TileLayer.Zoomify(url, options);
+};