Imports cased like the filename

src/ol/source/TileDebug.js

@@ -0,0 +1,121 @@
+goog.provide('ol.source.TileDebug');
+
+goog.require('ol');
+goog.require('ol.Tile');
+goog.require('ol.TileState');
+goog.require('ol.dom');
+goog.require('ol.size');
+goog.require('ol.source.Tile');
+goog.require('ol.tilecoord');
+
+
+/**
+ * @classdesc
+ * A pseudo tile source, which does not fetch tiles from a server, but renders
+ * a grid outline for the tile grid/projection along with the coordinates for
+ * each tile. See examples/canvas-tiles for an example.
+ *
+ * Uses Canvas context2d, so requires Canvas support.
+ *
+ * @constructor
+ * @extends {ol.source.Tile}
+ * @param {olx.source.TileDebugOptions} options Debug tile options.
+ * @api
+ */
+ol.source.TileDebug = function(options) {
+
+  ol.source.Tile.call(this, {
+    opaque: false,
+    projection: options.projection,
+    tileGrid: options.tileGrid,
+    wrapX: options.wrapX !== undefined ? options.wrapX : true
+  });
+
+};
+ol.inherits(ol.source.TileDebug, ol.source.Tile);
+
+
+/**
+ * @inheritDoc
+ */
+ol.source.TileDebug.prototype.getTile = function(z, x, y) {
+  var tileCoordKey = ol.tilecoord.getKeyZXY(z, x, y);
+  if (this.tileCache.containsKey(tileCoordKey)) {
+    return /** @type {!ol.source.TileDebug.Tile_} */ (this.tileCache.get(tileCoordKey));
+  } else {
+    var tileSize = ol.size.toSize(this.tileGrid.getTileSize(z));
+    var tileCoord = [z, x, y];
+    var textTileCoord = this.getTileCoordForTileUrlFunction(tileCoord);
+    var text = !textTileCoord ? '' :
+      this.getTileCoordForTileUrlFunction(textTileCoord).toString();
+    var tile = new ol.source.TileDebug.Tile_(tileCoord, tileSize, text);
+    this.tileCache.set(tileCoordKey, tile);
+    return tile;
+  }
+};
+
+
+/**
+ * @constructor
+ * @extends {ol.Tile}
+ * @param {ol.TileCoord} tileCoord Tile coordinate.
+ * @param {ol.Size} tileSize Tile size.
+ * @param {string} text Text.
+ * @private
+ */
+ol.source.TileDebug.Tile_ = function(tileCoord, tileSize, text) {
+
+  ol.Tile.call(this, tileCoord, ol.TileState.LOADED);
+
+  /**
+   * @private
+   * @type {ol.Size}
+   */
+  this.tileSize_ = tileSize;
+
+  /**
+   * @private
+   * @type {string}
+   */
+  this.text_ = text;
+
+  /**
+   * @private
+   * @type {HTMLCanvasElement}
+   */
+  this.canvas_ = null;
+
+};
+ol.inherits(ol.source.TileDebug.Tile_, ol.Tile);
+
+
+/**
+ * Get the image element for this tile.
+ * @return {HTMLCanvasElement} Image.
+ */
+ol.source.TileDebug.Tile_.prototype.getImage = function() {
+  if (this.canvas_) {
+    return this.canvas_;
+  } else {
+    var tileSize = this.tileSize_;
+    var context = ol.dom.createCanvasContext2D(tileSize[0], tileSize[1]);
+
+    context.strokeStyle = 'black';
+    context.strokeRect(0.5, 0.5, tileSize[0] + 0.5, tileSize[1] + 0.5);
+
+    context.fillStyle = 'black';
+    context.textAlign = 'center';
+    context.textBaseline = 'middle';
+    context.font = '24px sans-serif';
+    context.fillText(this.text_, tileSize[0] / 2, tileSize[1] / 2);
+
+    this.canvas_ = context.canvas;
+    return context.canvas;
+  }
+};
+
+
+/**
+ * @override
+ */
+ol.source.TileDebug.Tile_.prototype.load = function() {};