text: /*
   * Copyright 2015-present Open Networking Laboratory
   *
   * 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.
   */
  
  /*
   ONOS GUI -- SVG -- Map Service
   */
  
  /*
      The Map Service provides a simple API for loading geographical maps into
      an SVG layer. For example, as a background to the Topology View.
  
      e.g.  var promise = MapService.loadMapInto(svgLayer, '*continental-us');
  
      The Map Service makes use of the GeoDataService to load the required data
      from the server and to create the appropriate geographical projection.
  
      A promise is returned to the caller, which is resolved with the
      map projection once created.
  */
  
  (function () {
      'use strict';
  
      // injected references
      var $log, $q, fs, gds;
  
      // NOTE: This method assumes the datafile has exactly the map data
      //       that you want to load; for example id="*continental_us"
      //       mapping to ~/data/map/continental_us.topojson contains
      //       exactly the paths for the continental US.
  
      function loadMapInto(mapLayer, id, opts) {
          var promise = gds.fetchTopoData(id),
              deferredProjection = $q.defer();
  
          if (!promise) {
              $log.warn('Failed to load map: ' + id);
              return false;
          }
  
          promise.then(function () {
              var gen = gds.createPathGenerator(promise.topodata, opts);
  
              deferredProjection.resolve(gen.settings.projection);
  
              mapLayer.selectAll('path')
                  .data(gen.geodata.features)
                  .enter()
                  .append('path')
                  .attr('d', gen.pathgen);
  
              reshade(opts.shading);
          });
          return deferredProjection.promise;
      }
  
      // ---
  
      // NOTE: This method uses the countries.topojson data file, and then
      //       filters the results based on the supplied options.
      // Usage:
      //     promise = loadMapRegionInto(svgGroup, {
      //         countryFilter: function (country) {
      //             return country.properties.continent === 'South America';
      //         }
      //     });
  
      function loadMapRegionInto(mapLayer, opts) {
          var promise = gds.fetchTopoData("*countries"),
              deferredProjection = $q.defer();
  
          if (!promise) {
              $log.warn('Failed to load countries TopoJSON data');
              return false;
          }
  
          promise.then(function () {
              var width = 1000,
                  height = 1000,
                  proj = d3.geo.mercator().translate([width/2, height/2]),
                  pathGen = d3.geo.path().projection(proj),
                  data = promise.topodata,
                  features = topojson.feature(data, data.objects.countries).features,
                  country = features.filter(opts.countryFilter),
                  countryFeature = {
                      type: 'FeatureCollection',
                      features: country
                  },
                  path = d3.geo.path().projection(proj);
  
              gds.rescaleProjection(proj, 0.95, 1000, path, countryFeature, opts.adjustScale);
  
              deferredProjection.resolve(proj);
  
              mapLayer.selectAll('path.country')
                  .data([countryFeature])
                  .enter()
                  .append('path').classed('country', true)
                  .attr('d', pathGen);
  
              reshade(opts.shading);
          });
          return deferredProjection.promise;
      }
  
      function reshade(sh) {
          var p = sh && sh.palette,
              paths, stroke, fill, bg,
              svg = d3.select('#ov-topo').select('svg');
          if (sh) {
              stroke = p.outline;
              fill = sh.flip ? p.sea : p.land;
              bg = sh.flip ? p.land : p.sea;
  
              paths = d3.select('#topo-map').selectAll('path');
              svg.style('background-color', bg);
              paths.attr({
                  stroke: stroke,
                  fill: fill
              });
          } else {
              svg.style('background-color', null);
          }
      }
  
      angular.module('onosSvg')
          .factory('MapService', ['$log', '$q', 'FnService', 'GeoDataService',
          function (_$log_, _$q_, _fs_, _gds_) {
              $log = _$log_;
              $q = _$q_;
              fs = _fs_;
              gds = _gds_;
  
              return {
                  loadMapRegionInto: loadMapRegionInto,
                  loadMapInto: loadMapInto,
                  reshade: reshade
              };
          }]);
  
  }());
  