Give each source file a unique name

src/ol/interaction/keyboardpaninteraction.js

@@ -0,0 +1,63 @@
+goog.provide('ol.interaction.KeyboardPan');
+
+goog.require('goog.events.KeyCodes');
+goog.require('goog.events.KeyHandler.EventType');
+goog.require('ol.interaction.Interaction');
+
+
+
+/**
+ * @constructor
+ * @extends {ol.interaction.Interaction}
+ * @param {number} pixelDelta Pixel delta.
+ */
+ol.interaction.KeyboardPan = function(pixelDelta) {
+
+  goog.base(this);
+
+  /**
+   * @private
+   * @type {number}
+   */
+  this.pixelDelta_ = pixelDelta;
+
+};
+goog.inherits(ol.interaction.KeyboardPan, ol.interaction.Interaction);
+
+
+/**
+ * @inheritDoc
+ */
+ol.interaction.KeyboardPan.prototype.handleMapBrowserEvent =
+    function(mapBrowserEvent) {
+  if (mapBrowserEvent.type == goog.events.KeyHandler.EventType.KEY) {
+    var keyEvent = /** @type {goog.events.KeyEvent} */
+        mapBrowserEvent.browserEvent;
+    var keyCode = keyEvent.keyCode;
+    if (keyCode == goog.events.KeyCodes.DOWN ||
+        keyCode == goog.events.KeyCodes.LEFT ||
+        keyCode == goog.events.KeyCodes.RIGHT ||
+        keyCode == goog.events.KeyCodes.UP) {
+      var map = mapBrowserEvent.map;
+      var resolution = map.getResolution();
+      var delta;
+      var mapUnitsDelta = resolution * this.pixelDelta_;
+      if (keyCode == goog.events.KeyCodes.DOWN) {
+        delta = new ol.Coordinate(0, -mapUnitsDelta);
+      } else if (keyCode == goog.events.KeyCodes.LEFT) {
+        delta = new ol.Coordinate(-mapUnitsDelta, 0);
+      } else if (keyCode == goog.events.KeyCodes.RIGHT) {
+        delta = new ol.Coordinate(mapUnitsDelta, 0);
+      } else {
+        goog.asserts.assert(keyCode == goog.events.KeyCodes.UP);
+        delta = new ol.Coordinate(0, mapUnitsDelta);
+      }
+      var oldCenter = map.getCenter();
+      var newCenter = new ol.Coordinate(
+          oldCenter.x + delta.x, oldCenter.y + delta.y);
+      map.setCenter(newCenter);
+      keyEvent.preventDefault();
+      mapBrowserEvent.preventDefault();
+    }
+  }
+};