# Source: src/ol/control/zoomtoextentcontrol.js

    // FIXME works for View2D only

    goog.provide('ol.control.ZoomToExtent');

    goog.require('goog.asserts');
    goog.require('goog.dom');
    goog.require('goog.dom.TagName');
    goog.require('goog.events');
    goog.require('goog.events.EventType');
    goog.require('ol.control.Control');
    goog.require('ol.css');
    goog.require('ol.pointer.PointerEventHandler');

    /**
     * @classdesc
     * A button control which, when pressed, changes the map view to a specific
     * extent. To style this control use the css selector `.ol-zoom-extent`.
     *
     * @constructor
     * @extends {ol.control.Control}
     * @param {olx.control.ZoomToExtentOptions=} opt_options Options.
     * @todo api
     */
    ol.control.ZoomToExtent = function(opt_options) {
      var options = goog.isDef(opt_options) ? opt_options : {};

      /**
       * @type {ol.Extent}
       * @private
       */
      this.extent_ = goog.isDef(options.extent) ? options.extent : null;

      var className = goog.isDef(options.className) ? options.className :
          'ol-zoom-extent';

      var tipLabel = goog.isDef(options.tipLabel) ?
          options.tipLabel : 'Fit to extent';
      var tip = goog.dom.createDom(goog.dom.TagName.SPAN, {
        'role' : 'tooltip'
      }, tipLabel);
      var button = goog.dom.createDom(goog.dom.TagName.BUTTON, {
        'class': 'ol-has-tooltip'
      });
      goog.dom.appendChild(button, tip);

      var buttonHandler = new ol.pointer.PointerEventHandler(button);
      this.registerDisposable(buttonHandler);
      goog.events.listen(buttonHandler, ol.pointer.EventType.POINTERUP,
          this.handlePointerUp_, false, this);
      goog.events.listen(button, goog.events.EventType.CLICK,
          this.handleClick_, false, this);

      goog.events.listen(button, [
        goog.events.EventType.MOUSEOUT,
        goog.events.EventType.FOCUSOUT
      ], function() {
        this.blur();
      }, false);

      var cssClasses = className + ' ' + ol.css.CLASS_UNSELECTABLE + ' ' +
          ol.css.CLASS_CONTROL;
      var element = goog.dom.createDom(goog.dom.TagName.DIV, cssClasses, button);

      goog.base(this, {
        element: element,
        target: options.target
      });
    };
    goog.inherits(ol.control.ZoomToExtent, ol.control.Control);

    /**
     * @param {goog.events.BrowserEvent} event The event to handle
     * @private
     */
    ol.control.ZoomToExtent.prototype.handleClick_ = function(event) {
      if (event.screenX !== 0 && event.screenY !== 0) {
        return;
      }
      this.handleZoomToExtent_();
    };

    /**
     * @param {ol.pointer.PointerEvent} pointerEvent The event to handle
     * @private
     */
    ol.control.ZoomToExtent.prototype.handlePointerUp_ = function(pointerEvent) {
      pointerEvent.browserEvent.preventDefault();
      this.handleZoomToExtent_();
    };

    /**
     * @private
     */
    ol.control.ZoomToExtent.prototype.handleZoomToExtent_ = function() {
      var map = this.getMap();
      var view = map.getView();
      goog.asserts.assert(goog.isDef(view));
      var view2D = view.getView2D();
      var extent = goog.isNull(this.extent_) ?
          view2D.getProjection().getExtent() : this.extent_;
      view2D.fitExtent(extent, map.getSize());
    };