src/wrmap.ts

   1 import './wrmap.css'
   2 import OlMap from 'ol/Map';
   3 import OlView from 'ol/View';
   4 import OlStyle from 'ol/style/Style';
   5 import OlStroke from 'ol/style/Stroke';
   6 import OlText from 'ol/style/Text';
   7 import OlIcon from 'ol/style/Icon';
   8 import { FeatureLike as OlFeatureLike } from 'ol/Feature';
   9 import OlGeoJson from 'ol/format/GeoJSON';
  10 import OlOverlay from 'ol/Overlay';
  11 import OlSourceVector from 'ol/source/Vector';
  12 import OlSourceWmts from 'ol/source/WMTS';
  13 import OlFormatWmtsCapabilities from 'ol/format/WMTSCapabilities';
  14 import { optionsFromCapabilities } from 'ol/source/WMTS';
  15 import OlLayerVector from 'ol/layer/Vector';
  16 import OlLayerTile from 'ol/layer/Tile';
  17 import { SimpleGeometry as OlSimpleGeometry } from 'ol/geom';
  18 import OlPoint from 'ol/geom/Point';
  19 import OlInteractionDragPan from 'ol/interaction/DragPan';
  20 import OlInteractionMouseWheelZoom from 'ol/interaction/MouseWheelZoom';
  21 import OlInteractionSelect from 'ol/interaction/Select';
  22 import OlFormatWkt from 'ol/format/WKT';
  23 import * as olEventsCondition from 'ol/events/condition';
  24 import { defaults as olControlDefaults } from 'ol/control/defaults';
  25 import { defaults as olInteractionDefaults } from 'ol/interaction/defaults';
  26 import { get as olProjGet, fromLonLat } from 'ol/proj';
  27
  28
  29 type SledrunCondition = number;
  30
  31
  32
  33 function init_wrmap(_: number, jq_map_element: HTMLElement) {
  34         // define constants
  35         let EPSG4326 = olProjGet("EPSG:4326")!; // lon/lat
  36         let EPSG3857 = olProjGet("EPSG:3857")!; // google
  37
  38
  39         interface StringStringHash {
  40                 [key: string]: string
  41         }
  42
  43         // tool functions
  44         function createElement(tagName: string, attributes: StringStringHash = {}) {
  45                 let element = $(document.createElement(tagName));
  46                 for (let attribute in attributes) {
  47                         element.attr(attribute, attributes[attribute]);
  48                 }
  49                 return element;
  50         }
  51
  52
  53         function appendElement(parentElement: JQuery<HTMLElement>, tagName: string, attributes: StringStringHash = {}) {
  54                 let element = createElement(tagName, attributes);
  55                 parentElement.append(element);
  56                 return element;
  57         }
  58
  59
  60         // extract geojson from map element and clear map element's content
  61         let jq_map = $(jq_map_element);
  62         let ext_path = jq_map.attr('data-ext-path'); // e.g. '/mediawiki/extensions/wrmap'
  63         let img_path = ext_path + '/img';
  64         let json_string = jq_map.children().last().text();
  65         jq_map.empty(); // once parsed, remove geojson string from the map element.
  66         let json_js = JSON.parse(json_string);
  67         let format_geojson = new OlGeoJson();
  68         let features_all = format_geojson.readFeatures(json_js, {dataProjection: EPSG4326, featureProjection: EPSG3857});
  69
  70
  71         // path layer
  72         // ----------
  73
  74         function get_feature_title(feature: OlFeatureLike) {
  75                 let title = feature.get('type');
  76                 if (title == 'sledrun') return feature.get('name');
  77                 title = title.charAt(0).toUpperCase() + title.slice(1); // first letter uppercase
  78                 if (feature.get('name')) title += ': ' + feature.get('name');
  79                 return title;
  80         }
  81
  82
  83         // Returns 0 to 5 for features that represent sledruns as their condition
  84         let get_sledrun_condition = function(feature: OlFeatureLike): SledrunCondition {
  85                 let condition = feature.get('condition');
  86                 if (condition === undefined) return 0;
  87                 return condition;
  88         }
  89
  90
  91         function sledrun_icon_style(condition: SledrunCondition, highlight: boolean) {
  92                 let hl = highlight ? 'h' : 'n';
  93                 let src = img_path + '/marker_c_sledrun_' + condition + 'n' + hl + '.png';
  94                 return new OlStyle({
  95                         image: new OlIcon({
  96                                 src: src,
  97                                 size: [17, 17],
  98                                 anchor: [0.5, 0.5]
  99                         }),
 100                 });
 101
 102         }
 103
 104         function sledrun_icon_shadow_style() {
 105                 return new OlStyle({
 106                         image: new OlIcon({
 107                                 src: img_path + '/marker_c_shadow.png',
 108                                 size: [23, 23],
 109                                 anchor: [0.4, 0.4]
 110                         }),
 111                 });
 112         }
 113
 114         function marker_icon_style(feature: OlFeatureLike) {
 115                 let src = img_path + '/marker_p_' + feature.get('type') + '.png';
 116                 return new OlStyle({
 117                         image: new OlIcon({
 118                                 src: src,
 119                                 size: [20, 34],
 120                                 anchor: [0.5, 1.0]
 121                         }),
 122                 });
 123         }
 124
 125
 126         function point_style(feature: OlFeatureLike, highlight: boolean) {
 127                 let sledrun = feature.get('type') == 'sledrun';
 128                 let icon_style;
 129                 if (sledrun) {
 130                         let condition = get_sledrun_condition(feature);
 131                         icon_style = sledrun_icon_style(condition, highlight);
 132                 } else icon_style = marker_icon_style(feature);
 133                 if (highlight) {
 134                         icon_style.setText(new OlText({
 135                                 text: get_feature_title(feature),
 136                                 font: 'icon',
 137                                 offsetY: 14,
 138                                 stroke: new OlStroke({
 139                                         color: '#ddd',
 140                                         width: 2,
 141                                 }),
 142                         }));
 143                 }
 144                 if (sledrun) {
 145                         let shadow_style = sledrun_icon_shadow_style();
 146                         return [shadow_style, icon_style];
 147                 }
 148                 return [icon_style];
 149         }
 150
 151
 152         function style_point_function(feature: OlFeatureLike, _resolution: number) {
 153                 return point_style(feature, false);
 154         }
 155
 156
 157         function style_point_function_highlight(feature: OlFeatureLike, _resolution: number) {
 158                 return point_style(feature, true);
 159         }
 160
 161
 162         function style_path_function(feature: OlFeatureLike, _resolution: number) {
 163                 let line_color = {
 164                         'rodelbahn': '#014e9a',
 165                         'gehweg': '#e98401',
 166                         'alternative': '#7f7fff',
 167                         'lift': '#000000',
 168                         'anfahrt': '#e1e100'
 169                 };
 170                 let featureType: keyof(typeof line_color) = feature.get('type');
 171                 let color = feature.get('strokeColor') || line_color[featureType] || '#e7525b';
 172                 let width = (['lift', 'anfahrt'].indexOf(feature.get('type')) >= 0) ? 3 : 6;
 173                 return new OlStyle({
 174                         stroke: new OlStroke({
 175                                 color: color,
 176                                 width: width
 177                         })
 178                 });
 179         }
 180
 181
 182         function style_function(feature: OlFeatureLike, resolution: number) {
 183                 if (feature.getGeometry() instanceof OlPoint) return style_point_function(feature, resolution);
 184                 return style_path_function(feature, resolution);
 185         };
 186
 187
 188         function style_function_highlight(feature: OlFeatureLike, resolution: number) {
 189                 if (feature.getGeometry() instanceof OlPoint) return style_point_function_highlight(feature, resolution);
 190                 return style_path_function(feature, resolution);
 191         };
 192
 193
 194         // popup overlay
 195         // -------------
 196         let popup_container = document.getElementById('popup')!;
 197         let popup_content = document.getElementById('popup-content')!;
 198         let popup_closer = document.getElementById('popup-closer')!;
 199         let popup_overlay = new OlOverlay({element: popup_container, autoPan: {animation: {duration: 250}}});
 200         popup_closer.onclick = function() {popup_overlay.setPosition(undefined); popup_closer.blur(); return false;};
 201
 202
 203         function create_popup_dom(feature: OlFeatureLike) {
 204                 let popup_div = createElement('div');
 205
 206                 // name
 207                 if (feature.get('name') !== undefined && (feature.get('wiki') !== undefined || feature.get('thumb_url') !== undefined)) {
 208                         let h2 = appendElement(popup_div, 'h2');
 209                         if (feature.get('wiki') === undefined) h2.text(feature.get('name'));
 210                         else appendElement(h2, 'a', {href: new mw.Title(feature.get('wiki')).getUrl({})}).text(feature.get('name'));
 211                 }
 212
 213                 // sledrun information
 214                 if (feature.get('type') == 'sledrun') {
 215                         let p = appendElement(popup_div, 'p').text('Rodelbahnzustand').append(createElement('br'));
 216                         let wiki_title = new mw.Title(feature.get('wiki'));
 217                         if (feature.get('condition') !== undefined) {
 218                                 let condition_text = {1: 'Sehr gut', 2: 'Gut', 3: 'Mittelmäßig', 4: 'Schlecht', 5: 'Geht nicht'};
 219                                 let condition: keyof(typeof condition_text) = feature.get('condition');
 220                                 let year_month_day = feature.get('date_report').split('-');
 221                                 p.append(createElement('a', {href: wiki_title.getUrl({}) + '#Eintr.C3.A4ge'}).text(condition_text[condition]), ' ');
 222                                 p.append(createElement('small').text(year_month_day[2] + '.' + year_month_day[1] + '.'), ' ');
 223                                 p.append(createElement('em').append(createElement('a', {href: wiki_title.getUrl({}) + '#Eintragen'}).text('Neu')));
 224                         } else {
 225                                 p.append(createElement('em').append(createElement('a', {href: wiki_title.getUrl({}) + '#Eintragen'}).text('Bitte eintragen')));
 226                         }
 227                 }
 228
 229                 // wiki link
 230                 if (feature.get('wiki') !== undefined) {
 231                         let a = appendElement(appendElement(popup_div, 'p'), 'a', {href: new mw.Title(feature.get('wiki')).getUrl({})});
 232                         let detail_text = 'Details';
 233                         if (feature.get('type') == 'sledrun') detail_text += ' zur Rodelbahn';
 234                         if (feature.get('type') == 'gasthaus') detail_text += ' zum Gasthaus';
 235                         if (feature.get('thumb_url') === undefined) a.text(detail_text);
 236                         else a.append(createElement('img', {src: feature.get('thumb_url'), alt: detail_text, title: detail_text}));
 237                 }
 238
 239                 return popup_div;
 240         }
 241
 242
 243         // map itself
 244         // ----------
 245         let lon = json_js.properties.lon;
 246         let lat = json_js.properties.lat;
 247         let zoom = json_js.properties.zoom;
 248         let width = json_js.properties.width;
 249         let height = json_js.properties.height;
 250         if (zoom === undefined) zoom = 10; // default zoom
 251         if (width === undefined) width = '100%'; // default width
 252         if (height === undefined) height = 450;  // default: 450 pixel
 253         jq_map.width(width);
 254         jq_map.height(height);
 255
 256         let layer_sledrun_source = new OlSourceVector({features: features_all});
 257         let layer_sledrun = new OlLayerVector({
 258                 source: layer_sledrun_source,
 259                 style: style_function
 260         });
 261
 262         let map = new OlMap({
 263                 target: jq_map[0],
 264                 layers: [
 265                         layer_sledrun
 266                 ],
 267                 overlays: [popup_overlay],
 268                 view: new OlView({
 269                         center: fromLonLat([lon, lat]),
 270                         zoom: zoom
 271                 }),
 272                 controls: olControlDefaults({
 273                         attributionOptions: {
 274                                 collapsible: false
 275                         }
 276                 }),
 277                 interactions: olInteractionDefaults({
 278                         mouseWheelZoom: false,
 279                         dragPan: false,
 280                 }).extend([
 281                         new OlInteractionDragPan({
 282                                 condition: function (event) {
 283                                         let dragPan = this as OlInteractionDragPan;
 284                                         return dragPan.getPointerCount() === 2 || olEventsCondition.platformModifierKeyOnly(event);
 285                                 },
 286                         }),
 287                         new OlInteractionMouseWheelZoom({
 288                                 condition: olEventsCondition.platformModifierKeyOnly,
 289                         }),
 290                         new OlInteractionSelect({
 291                                 condition: olEventsCondition.pointerMove,
 292                                 style: style_function_highlight,
 293                         })
 294                 ])
 295         });
 296
 297         let select_click = new OlInteractionSelect({
 298                 condition: olEventsCondition.click,
 299                 style: null,
 300         });
 301         map.addInteraction(select_click);
 302         select_click.on('select', function(event) {
 303                 if (event.selected.length > 0) {
 304                         let feature: OlFeatureLike = event.selected[0];
 305                         let geometry = feature.getGeometry() as OlSimpleGeometry;
 306                         let coordinates = geometry.getFirstCoordinate();
 307                         let popup_dom = create_popup_dom(feature);
 308                         if (popup_dom.children().length > 0) {
 309                                 $(popup_content).empty().append(popup_dom);
 310                                 popup_overlay.setPosition(coordinates);
 311                         }
 312                 }
 313         });
 314
 315
 316         // background layer
 317         // ----------------
 318         function get_austria_feature() {
 319                 // simplified "inner" polygon of Austria, created with tools/austria_simplified.py
 320                 let austria_wkt = 'POLYGON ((9.599 47.269, 9.767 47.523, 9.986 47.442, 10.192 47.234, 10.366 47.287, 10.488 47.497, ' +
 321                         '10.814 47.477, 11.052 47.349, 11.732 47.539, 12.211 47.578, 12.269 47.656, 12.474 47.593, 12.676 47.622, ' +
 322                         '12.839 47.471, 13.039 47.436, 13.120 47.661, 12.989 47.754, 13.019 47.900, 12.864 48.130, 13.419 48.328, ' +
 323                         '13.516 48.523, 13.769 48.509, 13.867 48.699, 14.173 48.535, 14.726 48.561, 14.851 48.728, 14.983 48.751, ' +
 324                         '15.036 48.954, 15.803 48.820, 16.041 48.711, 16.374 48.694, 16.496 48.754, 16.831 48.668, 16.800 48.376, ' +
 325                         '17.050 48.001, 16.985 47.742, 16.583 47.795, 16.363 47.696, 16.605 47.538, 16.379 47.412, 16.402 47.043, ' +
 326                         '15.994 46.879, 15.914 46.732, 14.874 46.649, 14.538 46.455, 12.501 46.715, 12.213 46.957, 12.267 47.065, ' +
 327                         '12.181 47.126, 11.762 47.031, 11.220 47.018, 10.925 46.815, 10.520 46.900, 10.359 47.029, 10.134 46.899, ' +
 328                         '9.674 47.095, 9.599 47.269))';
 329                 let format = new OlFormatWkt();
 330                 let feature = format.readFeature(austria_wkt, {
 331                         dataProjection: EPSG4326,
 332                         featureProjection: EPSG3857,
 333                 });
 334                 return feature;
 335         }
 336
 337         // basemap.at layer
 338         let austriaFeature = get_austria_feature();
 339         let austriaGeometry = austriaFeature.getGeometry()!;
 340         function is_in_austria(feature: OlFeatureLike) {
 341                 let featureGeometry = feature.getGeometry() as OlSimpleGeometry;
 342                 return austriaGeometry.intersectsCoordinate(featureGeometry.getFirstCoordinate());
 343         }
 344         let austria_only = features_all.every(is_in_austria);
 345         let capabilitiesUrl = austria_only ? 'https://mapsneu.wien.gv.at/basemapneu/1.0.0/WMTSCapabilities.xml' : 'https://mapsneu.wien.gv.at/vaoneu/1.0.0/WMTSCapabilities.xml';
 346         fetch(capabilitiesUrl).then(function(response) {
 347                 return response.text();
 348         }).then(function(text) {
 349                 let result = new OlFormatWmtsCapabilities().read(text);
 350                 let options = optionsFromCapabilities(result, {
 351                         layer: austria_only ? 'bmapgrau' : 'vaoausland',
 352                         matrixSet: 'google3857',
 353                         style: 'normal',
 354                 })!;
 355                 options['attributions'] = austria_only ? 'Grundkarte: <a href="https://www.basemap.at/">basemap.at</a>' : 'Grundkarte: <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a>';
 356                 let layer_map = new OlLayerTile({
 357                         source: new OlSourceWmts(options),
 358                 });
 359                 map.getLayers().insertAt(0, layer_map);
 360         });
 361
 362         // // Alternatives:
 363         // // * OpenTopoMap (see https://opentopomap.org/about)
 364         // // * OSM
 365         // let layer_map = new ol.layer.Tile({
 366         //     source: new ol.source.OSM()
 367         // });
 368         // map.getLayers().insertAt(0, layer_map);
 369 }
 370
 371
 372 function init_wrmaps() {
 373         let jq_maps = $('.wrmap'); // all wrmap <div> elements
 374         jq_maps.each(init_wrmap);
 375 }
 376
 377
 378 $(init_wrmaps);