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 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
  30 function init_wrmap(_: number, jq_map_element: HTMLElement) {
  31         // define constants
  32         let EPSG4326 = olProjGet("EPSG:4326")!; // lon/lat
  33         let EPSG3857 = olProjGet("EPSG:3857")!; // google
  34
  35
  36         interface StringStringHash {
  37                 [key: string]: string
  38         }
  39
  40         // tool functions
  41         function createElement(tagName: string, attributes: StringStringHash = {}) {
  42                 let element = $(document.createElement(tagName));
  43                 for (let attribute in attributes) {
  44                         element.attr(attribute, attributes[attribute]);
  45                 }
  46                 return element;
  47         }
  48
  49
  50         function appendElement(parentElement: JQuery<HTMLElement>, tagName: string, attributes: StringStringHash = {}) {
  51                 let element = createElement(tagName, attributes);
  52                 parentElement.append(element);
  53                 return element;
  54         }
  55
  56
  57         // extract geojson from map element and clear map element's content
  58         let jq_map = $(jq_map_element);
  59         let ext_path = jq_map.attr('data-ext-path'); // e.g. '/mediawiki/extensions/wrmap'
  60         let img_path = ext_path + '/img';
  61         let json_string = jq_map.children().last().text();
  62         jq_map.empty(); // once parsed, remove geojson string from the map element.
  63         let json_js = JSON.parse(json_string);
  64         let format_geojson = new OlGeoJson();
  65         let features_all = format_geojson.readFeatures(json_js, {dataProjection: EPSG4326, featureProjection: EPSG3857});
  66
  67
  68         // path layer
  69         // ----------
  70
  71         function get_feature_title(feature: OlFeature) {
  72                 let title = feature.get('type');
  73                 if (title == 'sledrun') return feature.get('name');
  74                 title = title.charAt(0).toUpperCase() + title.slice(1); // first letter uppercase
  75                 if (feature.get('name')) title += ': ' + feature.get('name');
  76                 return title;
  77         }
  78
  79         // Returns 0 to 5 for features that represent sledruns as their condition
  80         let get_sledrun_condition = function(feature: OlFeature) {
  81                 let condition = feature.get('condition');
  82                 if (condition === undefined) return 0;
  83                 return condition;
  84         }
  85
  86         function sledrun_icon_style(condition, highlight: boolean) {
  87                 let hl = highlight ? 'h' : 'n';
  88                 let src = img_path + '/marker_c_sledrun_' + condition + 'n' + hl + '.png';
  89                 return new OlStyle({
  90                         image: new OlIcon({
  91                                 src: src,
  92                                 imgSize: [17, 17],
  93                                 anchor: [0.5, 0.5]
  94                         }),
  95                 });
  96
  97         }
  98
  99         function sledrun_icon_shadow_style() {
 100                 return new OlStyle({
 101                         image: new OlIcon({
 102                                 src: img_path + '/marker_c_shadow.png',
 103                                 imgSize: [23, 23],
 104                                 anchor: [0.4, 0.4]
 105                         }),
 106                 });
 107         }
 108
 109         function marker_icon_style(feature: OlFeature) {
 110                 let src = img_path + '/marker_p_' + feature.get('type') + '.png';
 111                 return new OlStyle({
 112                         image: new OlIcon({
 113                                 src: src,
 114                                 imgSize: [20, 34],
 115                                 anchor: [0.5, 1.0]
 116                         }),
 117                 });
 118         }
 119
 120
 121         function point_style(feature: OlFeature, highlight: boolean) {
 122                 let sledrun = feature.get('type') == 'sledrun';
 123                 let icon_style;
 124                 if (sledrun) {
 125                         let condition = get_sledrun_condition(feature);
 126                         icon_style = sledrun_icon_style(condition, highlight);
 127                 } else icon_style = marker_icon_style(feature);
 128                 if (highlight) {
 129                         icon_style.setText(new OlText({
 130                                 text: get_feature_title(feature),
 131                                 font: 'icon',
 132                                 offsetY: 14,
 133                                 stroke: new OlStroke({
 134                                         color: '#ddd',
 135                                         width: 2,
 136                                 }),
 137                         }));
 138                 }
 139                 if (sledrun) {
 140                         let shadow_style = sledrun_icon_shadow_style();
 141                         return [shadow_style, icon_style];
 142                 }
 143                 return [icon_style];
 144         }
 145
 146
 147         function style_point_function(feature: OlFeature, resolution) {
 148                 return point_style(feature, false);
 149         }
 150
 151
 152         function style_point_function_highlight(feature: OlFeature, resolution) {
 153                 return point_style(feature, true);
 154         }
 155
 156
 157         function style_path_function(feature: OlFeature, resolution) {
 158                 let line_color = {
 159                         'rodelbahn': '#014e9a',
 160                         'gehweg': '#e98401',
 161                         'alternative': '#7f7fff',
 162                         'lift': '#000000',
 163                         'anfahrt': '#e1e100'
 164                 };
 165                 let color = feature.get('strokeColor') || line_color[feature.get('type')] || '#e7525b';
 166                 let width = (['lift', 'anfahrt'].indexOf(feature.get('type')) >= 0) ? 3 : 6;
 167                 return new OlStyle({
 168                         stroke: new OlStroke({
 169                                 color: color,
 170                                 width: width
 171                         })
 172                 });
 173         }
 174
 175
 176         function style_function(feature: OlFeature, resolution) {
 177                 if (feature.getGeometry() instanceof OlPoint) return style_point_function(feature, resolution);
 178                 return style_path_function(feature, resolution);
 179         };
 180
 181
 182         function style_function_highlight(feature: OlFeature, resolution) {
 183                 if (feature.getGeometry() instanceof OlPoint) return style_point_function_highlight(feature, resolution);
 184                 return style_path_function(feature, resolution);
 185         };
 186
 187
 188         // popup overlay
 189         // -------------
 190         let popup_container = document.getElementById('popup');
 191         let popup_content = document.getElementById('popup-content');
 192         let popup_closer = document.getElementById('popup-closer');
 193         let popup_overlay = new OlOverlay({element: popup_container, autoPan: {animation: {duration: 250}}});
 194         popup_closer.onclick = function() {popup_overlay.setPosition(undefined); popup_closer.blur(); return false;};
 195
 196         function create_popup_dom(feature) {
 197                 let popup_div = createElement('div');
 198
 199                 // name
 200                 if (feature.get('name') !== undefined && (feature.get('wiki') !== undefined || feature.get('thumb_url') !== undefined)) {
 201                         let h2 = appendElement(popup_div, 'h2');
 202                         if (feature.get('wiki') === undefined) h2.text(feature.get('name'));
 203                         else appendElement(h2, 'a', {href: new mw.Title(feature.get('wiki')).getUrl()}).text(feature.get('name'));
 204                 }
 205
 206                 // sledrun information
 207                 if (feature.get('type') == 'sledrun') {
 208                         let p = appendElement(popup_div, 'p').text('Rodelbahnzustand').append(createElement('br'));
 209                         let wiki_title = new mw.Title(feature.get('wiki'));
 210                         if (feature.get('condition') !== undefined) {
 211                                 let condition_text = {1: 'Sehr gut', 2: 'Gut', 3: 'Mittelmäßig', 4: 'Schlecht', 5: 'Geht nicht'};
 212                                 let year_month_day = feature.get('date_report').split('-');
 213                                 p.append(createElement('a', {href: wiki_title.getUrl() + '#Eintr.C3.A4ge'}).text(condition_text[feature.get('condition')]), ' ');
 214                                 p.append(createElement('small').text(year_month_day[2] + '.' + year_month_day[1] + '.'), ' ');
 215                                 p.append(createElement('em').append(createElement('a', {href: wiki_title.getUrl() + '#Eintragen'}).text('Neu')));
 216                         } else {
 217                                 p.append(createElement('em').append(createElement('a', {href: wiki_title.getUrl() + '#Eintragen'}).text('Bitte eintragen')));
 218                         }
 219                 }
 220
 221                 // wiki link
 222                 if (feature.get('wiki') !== undefined) {
 223                         let a = appendElement(appendElement(popup_div, 'p'), 'a', {href: new mw.Title(feature.get('wiki')).getUrl()});
 224                         let detail_text = 'Details';
 225                         if (feature.get('type') == 'sledrun') detail_text += ' zur Rodelbahn';
 226                         if (feature.get('type') == 'gasthaus') detail_text += ' zum Gasthaus';
 227                         if (feature.get('thumb_url') === undefined) a.text(detail_text);
 228                         else a.append(createElement('img', {src: feature.get('thumb_url'), alt: detail_text, title: detail_text}));
 229                 }
 230
 231                 return popup_div;
 232         }
 233
 234
 235         // map itself
 236         // ----------
 237         let lon = json_js.properties.lon;
 238         let lat = json_js.properties.lat;
 239         let zoom = json_js.properties.zoom;
 240         let width = json_js.properties.width;
 241         let height = json_js.properties.height;
 242         if (zoom === undefined) zoom = 10; // default zoom
 243         if (width === undefined) width = '100%'; // default width
 244         if (height === undefined) height = 450;  // default: 450 pixel
 245         jq_map.width(width);
 246         jq_map.height(height);
 247
 248         let layer_sledrun_source = new OlSourceVector({features: features_all});
 249         let layer_sledrun = new OlLayerVector({
 250                 source: layer_sledrun_source,
 251                 style: style_function
 252         });
 253
 254         let map = new OlMap({
 255                 target: jq_map[0],
 256                 layers: [
 257                         layer_sledrun
 258                 ],
 259                 overlays: [popup_overlay],
 260                 view: new OlView({
 261                         center: fromLonLat([lon, lat]),
 262                         zoom: zoom
 263                 }),
 264                 controls: olControlDefaults({
 265                         attributionOptions: {
 266                                 collapsible: false
 267                         }
 268                 }),
 269                 interactions: olInteractionDefaults({
 270                         mouseWheelZoom: false,
 271                         dragPan: false,
 272                 }).extend([
 273                         new OlInteractionDragPan({
 274                                 condition: function (event) {
 275                                         return this.getPointerCount() === 2 || olEventsCondition.platformModifierKeyOnly(event);
 276                                 },
 277                         }),
 278                         new OlInteractionMouseWheelZoom({
 279                                 condition: olEventsCondition.platformModifierKeyOnly,
 280                         }),
 281                         new OlInteractionSelect({
 282                                 condition: olEventsCondition.pointerMove,
 283                                 style: style_function_highlight,
 284                         })
 285                 ])
 286         });
 287
 288         let select_click = new OlInteractionSelect({
 289                 condition: olEventsCondition.click,
 290                 style: false,
 291         });
 292         map.addInteraction(select_click);
 293         select_click.on('select', function(event) {
 294                 if (event.selected.length > 0) {
 295                         let feature = event.selected[0];
 296                         let coordinates = feature.getGeometry().getCoordinates();
 297                         let popup_dom = create_popup_dom(feature);
 298                         if (popup_dom.children().length > 0) {
 299                                 $(popup_content).empty().append(popup_dom);
 300                                 popup_overlay.setPosition(coordinates);
 301                         }
 302                 }
 303         });
 304
 305
 306         // background layer
 307         // ----------------
 308         function get_austria_feature() {
 309                 // simplified "inner" polygon of Austria, created with tools/austria_simplified.py
 310                 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, ' +
 311                         '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, ' +
 312                         '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, ' +
 313                         '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, ' +
 314                         '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, ' +
 315                         '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, ' +
 316                         '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, ' +
 317                         '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, ' +
 318                         '9.674 47.095, 9.599 47.269))';
 319                 let format = new OlFormatWkt();
 320                 let feature = format.readFeature(austria_wkt, {
 321                         dataProjection: EPSG4326,
 322                         featureProjection: EPSG3857,
 323                 });
 324                 return feature;
 325         }
 326
 327         // basemap.at layer
 328         let austria_feature = get_austria_feature();
 329         function is_in_austria(feature: OlFeature<OlGeometry>) {
 330                 return austria_feature.getGeometry().intersectsCoordinate(feature.getGeometry()!.getFirstCoordinate());
 331         }
 332         let austria_only = features_all.every(is_in_austria);
 333         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';
 334         fetch(capabilitiesUrl).then(function(response) {
 335                 return response.text();
 336         }).then(function(text) {
 337                 let result = new OlFormatWmtsCapabilities().read(text);
 338                 let options = optionsFromCapabilities(result, {
 339                         layer: austria_only ? 'bmapgrau' : 'vaoausland',
 340                         matrixSet: 'google3857',
 341                         style: 'normal',
 342                 });
 343                 options['attributions'] = austria_only ? 'Grundkarte: <a href="https://www.basemap.at/">basemap.at</a>' : 'Grundkarte: <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a>';
 344                 let layer_map = new OlLayerTile({
 345                         source: new OlSourceWmts(options),
 346                 });
 347                 map.getLayers().insertAt(0, layer_map);
 348         });
 349
 350         // // Alternatives:
 351         // // * OpenTopoMap (see https://opentopomap.org/about)
 352         // // * OSM
 353         // let layer_map = new ol.layer.Tile({
 354         //     source: new ol.source.OSM()
 355         // });
 356         // map.getLayers().insertAt(0, layer_map);
 357 }
 358
 359
 360 function init_wrmaps() {
 361         let jq_maps = $('.wrmap'); // all wrmap <div> elements
 362         jq_maps.each(init_wrmap);
 363 }
 364
 365
 366 $(init_wrmaps);