s/ol3/ol/

src/ol/tilecoord.js

@@ -0,0 +1,122 @@
+goog.provide('ol.TileCoord');
+
+goog.require('goog.array');
+goog.require('ol.Coordinate');
+
+
+/**
+ * @enum {number}
+ */
+ol.QuadKeyCharCode = {
+  ZERO: '0'.charCodeAt(0),
+  ONE: '1'.charCodeAt(0),
+  TWO: '2'.charCodeAt(0),
+  THREE: '3'.charCodeAt(0)
+};
+
+
+
+/**
+ * @constructor
+ * @extends {ol.Coordinate}
+ * @param {number} z Z.
+ * @param {number} x X.
+ * @param {number} y Y.
+ */
+ol.TileCoord = function(z, x, y) {
+
+  goog.base(this, x, y);
+
+  /**
+   * @type {number}
+   */
+  this.z = z;
+
+};
+goog.inherits(ol.TileCoord, ol.Coordinate);
+
+
+/**
+ * @param {string} quadKey Quad key.
+ * @return {ol.TileCoord} Tile coordinate.
+ */
+ol.TileCoord.createFromQuadKey = function(quadKey) {
+  var z = quadKey.length, x = 0, y = 0;
+  var mask = 1 << (z - 1);
+  var i;
+  for (i = 0; i < z; ++i) {
+    switch (quadKey.charCodeAt(i)) {
+      case ol.QuadKeyCharCode.ONE:
+        x += mask;
+        break;
+      case ol.QuadKeyCharCode.TWO:
+        y += mask;
+        break;
+      case ol.QuadKeyCharCode.THREE:
+        x += mask;
+        y += mask;
+        break;
+    }
+    mask >>= 1;
+  }
+  return new ol.TileCoord(z, x, y);
+};
+
+
+/**
+ * @param {string} str String.
+ * @return {ol.TileCoord} Tile coord.
+ */
+ol.TileCoord.createFromString = function(str) {
+  var v = str.split('/');
+  v = goog.array.map(v, function(e, i, a) {
+    return parseInt(e, 10);
+  });
+  return new ol.TileCoord(v[0], v[1], v[2]);
+};
+
+
+/**
+ * @return {ol.TileCoord} Clone.
+ */
+ol.TileCoord.prototype.clone = function() {
+  return new ol.TileCoord(this.z, this.x, this.y);
+};
+
+
+/**
+ * @return {number} Hash.
+ */
+ol.TileCoord.prototype.hash = function() {
+  return (this.x << this.z) + this.y;
+};
+
+
+/**
+ * @return {string} Quad key.
+ */
+ol.TileCoord.prototype.quadKey = function() {
+  var digits = new Array(this.z);
+  var mask = 1 << (this.z - 1);
+  var i, charCode;
+  for (i = 0; i < this.z; ++i) {
+    charCode = ol.QuadKeyCharCode.ZERO;
+    if (this.x & mask) {
+      charCode += 1;
+    }
+    if (this.y & mask) {
+      charCode += 2;
+    }
+    digits[i] = String.fromCharCode(charCode);
+    mask >>= 1;
+  }
+  return digits.join('');
+};
+
+
+/**
+ * @return {string} String.
+ */
+ol.TileCoord.prototype.toString = function() {
+  return [this.z, this.x, this.y].join('/');
+};