GUI -- Topo View - Added ability to define different background maps of world regions.

Change-Id: I937106c1c7c9e045230fce88dc7e5a5849b5cb3f

@@ -63,17 +63,11 @@
 
     function getUrl(id) {
         if (id[0] === '*') {
-            return bundledUrlPrefix + id.slice(1) + '.json';
+            return bundledUrlPrefix + id.slice(1) + '.topojson';
         }
-        return id + '.json';
+        return id + '.topojson';
     }
 
-    angular.module('onosSvg')
-        .factory('GeoDataService', ['$log', '$http', 'FnService',
-        function (_$log_, _$http_, _fs_) {
-            $log = _$log_;
-            $http = _$http_;
-            fs = _fs_;
 
     // start afresh...
     function clearCache() {
@@ -138,6 +132,17 @@
             mfs = settings.mapFillScale,
             path = d3.geo.path().projection(proj);
 
+        rescaleProjection(proj, mfs, dim, path, geoData);
+
+        // return the results
+        return {
+            geodata: geoData,
+            pathgen: path,
+            settings: settings
+        };
+    }
+
+    function rescaleProjection(proj, mfs, dim, path, geoData) {
         // adjust projection scale and translation to fill the view
         // with the map
 
@@ -161,19 +166,21 @@
 
         // set new scale, translation on the projection..
         proj.scale(s).translate(t);
-
-                // return the results
-                return {
-                    geodata: geoData,
-                    pathgen: path,
-                    settings: settings
-                };
     }
 
+    angular.module('onosSvg')
+        .factory('GeoDataService', ['$log', '$http', 'FnService',
+        function (_$log_, _$http_, _fs_) {
+            $log = _$log_;
+            $http = _$http_;
+            fs = _fs_;
+
+
             return {
                 clearCache: clearCache,
                 fetchTopoData: fetchTopoData,
-                createPathGenerator: createPathGenerator
+                createPathGenerator: createPathGenerator,
+                rescaleProjection: rescaleProjection
             };
         }]);
 }());
\ No newline at end of file

@@ -37,6 +37,11 @@
     // 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();
@@ -60,6 +65,52 @@
         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, filterOpts) {
+        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(filterOpts.countryFilter),
+                countryFeature = {
+                    type: 'FeatureCollection',
+                    features: country
+                },
+                path = d3.geo.path().projection(proj);
+
+            gds.rescaleProjection(proj, 0.95, 1000, path, countryFeature);
+
+            deferredProjection.resolve(proj);
+
+            mapLayer.selectAll('path.country')
+                .data([countryFeature])
+                .enter()
+                .append('path').classed('country', true)
+                .attr('d', pathGen);
+        });
+        return deferredProjection.promise;
+    }
 
     angular.module('onosSvg')
         .factory('MapService', ['$log', '$q', 'FnService', 'GeoDataService',
@@ -70,6 +121,7 @@
             gds = _gds_;
 
             return {
+                loadMapRegionInto: loadMapRegionInto,
                 loadMapInto: loadMapInto
             };
         }]);

@@ -65,7 +65,7 @@
 }
 
 .light #ov-topo svg #topo-map {
-    stroke: #eee;
+    stroke: #ddd;
 }
 .dark #ov-topo svg #topo-map {
     stroke: #444;

@@ -276,10 +276,57 @@
         sus.visible(noDevsLayer, b);
     }
 
-    function setUpMap() {
+
+    var countryFilters = {
+        world: function (c) {
+            return c.properties.continent !== 'Antarctica';
+        },
+
+        // NOTE: for "usa" we are using our hand-crafted topojson file
+
+        s_america: function (c) {
+            return c.properties.continent === 'South America';
+        },
+
+        japan: function (c) {
+            return c.properties.geounit === 'Japan';
+        },
+
+        europe: function (c) {
+            return c.properties.continent === 'Europe';
+        },
+
+        italy: function (c) {
+            return c.properties.geounit === 'Italy';
+        },
+
+        uk: function (c) {
+            // technically, Ireland is not part of the United Kingdom,
+            // but the map looks weird without it showing.
+            return c.properties.adm0_a3 === 'GBR' ||
+                c.properties.adm0_a3 === 'IRL';
+        }
+    };
+
+
+    function setUpMap($loc) {
+        var s1 = $loc.search().mapid,
+            s2 = ps.getPrefs('topo_mapid'),
+            mapId = s1 || (s2 && s2.id) || 'world',
+            promise,
+            cfilter,
+            opts;
+
         mapG = zoomLayer.append('g').attr('id', 'topo-map');
-        // returns a promise for the projection...
-        return ms.loadMapInto(mapG, '*continental_us');
+        if (mapId === 'usa') {
+            promise = ms.loadMapInto(mapG, '*continental_us');
+        } else {
+            ps.setPrefs('topo_mapid', {id:mapId});
+            cfilter = countryFilters[mapId] || countryFilters.world;
+            opts = { countryFilter: cfilter };
+            promise = ms.loadMapRegionInto(mapG, opts);
+        }
+        return promise;
     }
 
     function opacifyMap(b) {
@@ -405,7 +452,7 @@
             setUpDefs();
             setUpZoom();
             setUpNoDevs();
-            setUpMap().then(
+            setUpMap($loc).then(
                 function (proj) {
                     var z = ps.getPrefs('topo_zoom') || {tx:0, ty:0, sc:1};
                     zoomer.panZoom([z.tx, z.ty], z.sc);
@@ -416,6 +463,7 @@
                     flash.enable(false);
                     toggleMap(prefsState.bg);
                     flash.enable(true);
+                    // TODO: move tes.start() to here ????
                 }
             );
             setUpSprites($loc, tspr);