src/wrmap.ts

   1 import './wrmap.css'
   2 import OlMap from '../node_modules/ol/Map';
   3 import OlView from '../node_modules/ol/View';
   4 import OlStyle from '../node_modules/ol/style/Style';
   5 import OlStroke from '../node_modules/ol/style/Stroke';
   6 import OlText from '../node_modules/ol/style/Text';
   7 import OlIcon from '../node_modules/ol/style/Icon';
   8 import OlFeature, { FeatureLike as OlFeatureLike } from '../node_modules/ol/Feature';
   9 import OlGeoJson from '../node_modules/ol/format/GeoJSON';
  10 import OlOverlay from '../node_modules/ol/Overlay';
  11 import OlSourceVector from '../node_modules/ol/source/Vector';
  12 import OlSourceWmts from '../node_modules/ol/source/WMTS';
  13 import OlFormatWmtsCapabilities from '../node_modules/ol/format/WMTSCapabilities';
  14 import { optionsFromCapabilities } from 'ol/source/WMTS';
  15 import OlLayerVector from '../node_modules/ol/layer/Vector';
  16 import OlLayerTile from '../node_modules/ol/layer/Tile';
  17 import OlGeometry from '../node_modules/ol/geom/Geometry'
  18 import OlPoint from '../node_modules/ol/geom/Point';
  19 import OlInteractionDragPan from '../node_modules/ol/interaction/DragPan';
  20 import OlInteractionMouseWheelZoom from '../node_modules/ol/interaction/MouseWheelZoom';
  21 import OlInteractionSelect from '../node_modules/ol/interaction/Select';
  22 import OlFormatWkt from '../node_modules/ol/format/WKT';
  23 import * as olEventsCondition from '../node_modules/ol/events/condition';
  24 import { defaults as olControlDefaults } from '../node_modules/ol/control/defaults';
  25 import { defaults as olInteractionDefaults } from '../node_modules/ol/interaction/defaults';
  26 import { get as olProjGet, fromLonLat } from '../node_modules/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                                 imgSize: [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                                 imgSize: [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                                 imgSize: [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 color = feature.get('strokeColor') || line_color[feature.get('type')] || '#e7525b';
 171                 let width = (['lift', 'anfahrt'].indexOf(feature.get('type')) >= 0) ? 3 : 6;
 172                 return new OlStyle({
 173                         stroke: new OlStroke({
 174                                 color: color,
 175                                 width: width
 176                         })
 177                 });
 178         }
 179
 180
 181         function style_function(feature: OlFeatureLike, resolution: number) {
 182                 if (feature.getGeometry() instanceof OlPoint) return style_point_function(feature, resolution);
 183                 return style_path_function(feature, resolution);
 184         };
 185
 186
 187         function style_function_highlight(feature: OlFeatureLike, resolution: number) {
 188                 if (feature.getGeometry() instanceof OlPoint) return style_point_function_highlight(feature, resolution);
 189                 return style_path_function(feature, resolution);
 190         };
 191
 192
 193         // popup overlay
 194         // -------------
 195         let popup_container = document.getElementById('popup')!;
 196         let popup_content = document.getElementById('popup-content')!;
 197         let popup_closer = document.getElementById('popup-closer')!;
 198         let popup_overlay = new OlOverlay({element: popup_container, autoPan: {animation: {duration: 250}}});
 199         popup_closer.onclick = function() {popup_overlay.setPosition(undefined); popup_closer.blur(); return false;};
 200
 201
 202         function create_popup_dom(feature: OlFeatureLike) {
 203                 let popup_div = createElement('div');
 204
 205                 // name
 206                 if (feature.get('name') !== undefined && (feature.get('wiki') !== undefined || feature.get('thumb_url') !== undefined)) {
 207                         let h2 = appendElement(popup_div, 'h2');
 208                         if (feature.get('wiki') === undefined) h2.text(feature.get('name'));
 209                         else appendElement(h2, 'a', {href: new mw.Title(feature.get('wiki')).getUrl()}).text(feature.get('name'));
 210                 }
 211
 212                 // sledrun information
 213                 if (feature.get('type') == 'sledrun') {
 214                         let p = appendElement(popup_div, 'p').text('Rodelbahnzustand').append(createElement('br'));
 215                         let wiki_title = new mw.Title(feature.get('wiki'));
 216                         if (feature.get('condition') !== undefined) {
 217                                 let condition_text = {1: 'Sehr gut', 2: 'Gut', 3: 'Mittelmäßig', 4: 'Schlecht', 5: 'Geht nicht'};
 218                                 let year_month_day = feature.get('date_report').split('-');
 219                                 p.append(createElement('a', {href: wiki_title.getUrl() + '#Eintr.C3.A4ge'}).text(condition_text[feature.get('condition')]), ' ');
 220                                 p.append(createElement('small').text(year_month_day[2] + '.' + year_month_day[1] + '.'), ' ');
 221                                 p.append(createElement('em').append(createElement('a', {href: wiki_title.getUrl() + '#Eintragen'}).text('Neu')));
 222                         } else {
 223                                 p.append(createElement('em').append(createElement('a', {href: wiki_title.getUrl() + '#Eintragen'}).text('Bitte eintragen')));
 224                         }
 225                 }
 226
 227                 // wiki link
 228                 if (feature.get('wiki') !== undefined) {
 229                         let a = appendElement(appendElement(popup_div, 'p'), 'a', {href: new mw.Title(feature.get('wiki')).getUrl()});
 230                         let detail_text = 'Details';
 231                         if (feature.get('type') == 'sledrun') detail_text += ' zur Rodelbahn';
 232                         if (feature.get('type') == 'gasthaus') detail_text += ' zum Gasthaus';
 233                         if (feature.get('thumb_url') === undefined) a.text(detail_text);
 234                         else a.append(createElement('img', {src: feature.get('thumb_url'), alt: detail_text, title: detail_text}));
 235                 }
 236
 237                 return popup_div;
 238         }
 239
 240
 241         // map itself
 242         // ----------
 243         let lon = json_js.properties.lon;
 244         let lat = json_js.properties.lat;
 245         let zoom = json_js.properties.zoom;
 246         let width = json_js.properties.width;
 247         let height = json_js.properties.height;
 248         if (zoom === undefined) zoom = 10; // default zoom
 249         if (width === undefined) width = '100%'; // default width
 250         if (height === undefined) height = 450;  // default: 450 pixel
 251         jq_map.width(width);
 252         jq_map.height(height);
 253
 254         let layer_sledrun_source = new OlSourceVector({features: features_all});
 255         let layer_sledrun = new OlLayerVector({
 256                 source: layer_sledrun_source,
 257                 style: style_function
 258         });
 259
 260         let map = new OlMap({
 261                 target: jq_map[0],
 262                 layers: [
 263                         layer_sledrun
 264                 ],
 265                 overlays: [popup_overlay],
 266                 view: new OlView({
 267                         center: fromLonLat([lon, lat]),
 268                         zoom: zoom
 269                 }),
 270                 controls: olControlDefaults({
 271                         attributionOptions: {
 272                                 collapsible: false
 273                         }
 274                 }),
 275                 interactions: olInteractionDefaults({
 276                         mouseWheelZoom: false,
 277                         dragPan: false,
 278                 }).extend([
 279                         new OlInteractionDragPan({
 280                                 condition: function (event) {
 281                                         return this.getPointerCount() === 2 || olEventsCondition.platformModifierKeyOnly(event);
 282                                 },
 283                         }),
 284                         new OlInteractionMouseWheelZoom({
 285                                 condition: olEventsCondition.platformModifierKeyOnly,
 286                         }),
 287                         new OlInteractionSelect({
 288                                 condition: olEventsCondition.pointerMove,
 289                                 style: style_function_highlight,
 290                         })
 291                 ])
 292         });
 293
 294         let select_click = new OlInteractionSelect({
 295                 condition: olEventsCondition.click,
 296                 style: false,
 297         });
 298         map.addInteraction(select_click);
 299         select_click.on('select', function(event) {
 300                 if (event.selected.length > 0) {
 301                         let feature: OlFeatureLike = event.selected[0];
 302                         let coordinates = feature.getGeometry().getCoordinates();
 303                         let popup_dom = create_popup_dom(feature);
 304                         if (popup_dom.children().length > 0) {
 305                                 $(popup_content).empty().append(popup_dom);
 306                                 popup_overlay.setPosition(coordinates);
 307                         }
 308                 }
 309         });
 310
 311
 312         // background layer
 313         // ----------------
 314         function get_austria_feature() {
 315                 // simplified "inner" polygon of Austria, created with tools/austria_simplified.py
 316                 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, ' +
 317                         '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, ' +
 318                         '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, ' +
 319                         '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, ' +
 320                         '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, ' +
 321                         '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, ' +
 322                         '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, ' +
 323                         '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, ' +
 324                         '9.674 47.095, 9.599 47.269))';
 325                 let format = new OlFormatWkt();
 326                 let feature = format.readFeature(austria_wkt, {
 327                         dataProjection: EPSG4326,
 328                         featureProjection: EPSG3857,
 329                 });
 330                 return feature;
 331         }
 332
 333         // basemap.at layer
 334         let austria_feature = get_austria_feature();
 335         function is_in_austria(feature: OlFeature<OlGeometry>) {
 336                 return austria_feature.getGeometry().intersectsCoordinate(feature.getGeometry()!.getFirstCoordinate());
 337         }
 338         let austria_only = features_all.every(is_in_austria);
 339         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';
 340         fetch(capabilitiesUrl).then(function(response) {
 341                 return response.text();
 342         }).then(function(text) {
 343                 let result = new OlFormatWmtsCapabilities().read(text);
 344                 let options = optionsFromCapabilities(result, {
 345                         layer: austria_only ? 'bmapgrau' : 'vaoausland',
 346                         matrixSet: 'google3857',
 347                         style: 'normal',
 348                 });
 349                 options['attributions'] = austria_only ? 'Grundkarte: <a href="https://www.basemap.at/">basemap.at</a>' : 'Grundkarte: <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a>';
 350                 let layer_map = new OlLayerTile({
 351                         source: new OlSourceWmts(options),
 352                 });
 353                 map.getLayers().insertAt(0, layer_map);
 354         });
 355
 356         // // Alternatives:
 357         // // * OpenTopoMap (see https://opentopomap.org/about)
 358         // // * OSM
 359         // let layer_map = new ol.layer.Tile({
 360         //     source: new ol.source.OSM()
 361         // });
 362         // map.getLayers().insertAt(0, layer_map);
 363 }
 364
 365
 366 function init_wrmaps() {
 367         let jq_maps = $('.wrmap'); // all wrmap <div> elements
 368         jq_maps.each(init_wrmap);
 369 }
 370
 371
 372 $(init_wrmaps);