text: /*****************************************************************************
   * Open MCT, Copyright (c) 2014-2021, United States Government
   * as represented by the Administrator of the National Aeronautics and Space
   * Administration. All rights reserved.
   *
   * Open MCT is licensed under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   * http://www.apache.org/licenses/LICENSE-2.0.
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
   * License for the specific language governing permissions and limitations
   * under the License.
   *
   * Open MCT includes source code licensed under additional open source
   * licenses. See the Open Source Licenses file (LICENSES.md) included with
   * this source code distribution or the Licensing information page available
   * at runtime from the About dialog for additional information.
   *****************************************************************************/
  
  define(
      [],
      function () {
  
          // Default resize interval
          var DEFAULT_INTERVAL = 100;
  
          /**
           * The mct-resize directive allows the size of a displayed
           * HTML element to be tracked. This is done by polling,
           * since the DOM API does not currently provide suitable
           * events to watch this reliably.
           *
           * Attributes related to this directive are interpreted as
           * follows:
           *
           * * `mct-resize`: An Angular expression to evaluate when
           *   the size changes; the variable `bounds` will be provided
           *   with two fields, `width` and `height`, both in pixels.
           * * `mct-resize-interval`: Optional; the interval, in milliseconds,
           *   at which to watch for updates. In some cases checking for
           *   resize can carry a cost (it forces recalculation of
           *   positions within the document) so it may be preferable to watch
           *   infrequently. If omitted, a default of 100ms will be used.
           *   This is an Angular expression, and it will be re-evaluated after
           *   each interval.
           *
           * @memberof platform/commonUI/general
           * @constructor
           *
           */
          function MCTResize($timeout) {
  
              // Link; start listening for changes to an element's size
              function link(scope, element, attrs) {
                  var lastBounds,
                      linking = true,
                      active = true;
  
                  // Determine how long to wait before the next update
                  function currentInterval() {
                      return attrs.mctResizeInterval
                          ? scope.$eval(attrs.mctResizeInterval)
                          : DEFAULT_INTERVAL;
                  }
  
                  // Evaluate mct-resize with the current bounds
                  function fireEval(bounds) {
                      // Only update when bounds actually change
                      if (!lastBounds
                              || lastBounds.width !== bounds.width
                              || lastBounds.height !== bounds.height) {
                          scope.$eval(attrs.mctResize, { bounds: bounds });
                          if (!linking) { // Avoid apply-in-a-digest
                              scope.$apply();
                          }
  
                          lastBounds = bounds;
                      }
                  }
  
                  // Callback to fire after each timeout;
                  // update bounds and schedule another timeout
                  function onInterval() {
                      if (!active) {
                          return;
                      }
  
                      fireEval({
                          width: element[0].offsetWidth,
                          height: element[0].offsetHeight
                      });
                      $timeout(onInterval, currentInterval(), false);
                  }
  
                  // Stop running in the background
                  function deactivate() {
                      active = false;
                  }
  
                  // Unregister once out-of-scope
                  scope.$on("$destroy", deactivate);
  
                  // Handle the initial callback
                  onInterval();
  
                  // Trigger scope.$apply on subsequent changes
                  linking = false;
              }
  
              return {
                  // mct-resize only makes sense as an attribute
                  restrict: "A",
                  // Link function, to begin watching for changes
                  link: link
              };
          }
  
          return MCTResize;
      }
  );
  