Give each source file a unique name

src/ol/control/zoomcontrol.js

@@ -0,0 +1,73 @@
+goog.provide('ol.control.Zoom');
+
+goog.require('goog.dom');
+goog.require('goog.dom.TagName');
+goog.require('goog.events');
+goog.require('goog.events.EventType');
+goog.require('ol.BrowserFeature');
+goog.require('ol.Projection');
+goog.require('ol.control.Control');
+
+
+
+/**
+ * @constructor
+ * @extends {ol.control.Control}
+ * @param {ol.control.ZoomOptions} zoomOptions Zoom options.
+ */
+ol.control.Zoom = function(zoomOptions) {
+
+  var eventType = ol.BrowserFeature.HAS_TOUCH ?
+      goog.events.EventType.TOUCHEND : goog.events.EventType.CLICK;
+
+  var inElement = goog.dom.createDom(goog.dom.TagName.A, {
+    'href': '#zoomIn',
+    'class': 'ol-zoom-in'
+  }, '+');
+  goog.events.listen(inElement, eventType, this.handleIn_, false, this);
+
+  var outElement = goog.dom.createDom(goog.dom.TagName.A, {
+    'href': '#zoomOut',
+    'class': 'ol-zoom-out'
+  }, '\u2212');
+  goog.events.listen(outElement, eventType, this.handleOut_, false, this);
+
+  var element = goog.dom.createDom(
+      goog.dom.TagName.DIV, 'ol-zoom ol-unselectable', inElement, outElement);
+
+  goog.base(this, {
+    element: element,
+    map: zoomOptions.map,
+    target: zoomOptions.target
+  });
+
+  /**
+   * @type {number}
+   * @private
+   */
+  this.delta_ = goog.isDef(zoomOptions.delta) ? zoomOptions.delta : 1;
+
+};
+goog.inherits(ol.control.Zoom, ol.control.Control);
+
+
+/**
+ * @param {goog.events.BrowserEvent} browserEvent The browser event to handle.
+ * @private
+ */
+ol.control.Zoom.prototype.handleIn_ = function(browserEvent) {
+  // prevent #zoomIn anchor from getting appended to the url
+  browserEvent.preventDefault();
+  this.getMap().zoom(this.delta_);
+};
+
+
+/**
+ * @param {goog.events.BrowserEvent} browserEvent The browser event to handle.
+ * @private
+ */
+ol.control.Zoom.prototype.handleOut_ = function(browserEvent) {
+  // prevent #zoomOut anchor from getting appended to the url
+  browserEvent.preventDefault();
+  this.getMap().zoom(-this.delta_);
+};