191 lines
5.6 KiB
Text
191 lines
5.6 KiB
Text
/*
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osm.org routing interface
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See also:
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https://github.com/apmon/openstreetmap-website/tree/routing2
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https://github.com/apmon/openstreetmap-website/compare/routing2
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https://github.com/apmon/openstreetmap-website/blob/9755c3ae0a8d0684d43760f91dc864ff42d8477a/app/views/routing/start.js.erb
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*** draggable start/end markers
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*** translation (including all alerts and presentation)
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*** export GPX
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*** URL history (or do we consciously not want to support that?)
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*** add MapQuest engine
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*** add YOURS engine
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*** finish CloudMade engine
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*/
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var TURN_INSTRUCTIONS=["",
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"Continue on ", // 1
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"Slight right onto ", // 2
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"Turn right onto ", // 3
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"Sharp right onto ", // 4
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"U-turn along ", // 5
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"Sharp left onto ", // 6
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"Turn left onto ", // 7
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"Slight left onto ", // 8
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"(via point) ", // 9
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"Follow ", // 10
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"At roundabout take ", // 11
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"Leave roundabout - ", // 12
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"Stay on roundabout - ", // 13
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"Start at end of ", // 14
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"Reach destination", // 15
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"Go against one-way on ", // 16
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"End of one-way on "] // 17
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var ROUTING_POLYLINE={
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color: '#03f',
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opacity: 0.3,
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weight: 10
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};
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OSM.RoutingEngines={
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list: []
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// common functions and constants, e.g. OSRM parser, can go here
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};
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OSM.Routing=function(map,name,jqSearch) {
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var r={};
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r.map=map; // Leaflet map
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r.name=name; // global variable name of this instance (needed for JSONP)
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r.jqSearch=jqSearch; // JQuery object for search panel
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r.route_from=null;
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r.route_to=null;
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r.viaPoints=[];
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r.polyline=null;
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r.chosenEngine=null;
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// Geocoding
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r.geocode=function(id,event) { var _this=this;
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var field=event.target;
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var v=event.target.value;
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// *** do something if v==''
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var querystring = '<%= NOMINATIM_URL %>search?q=' + encodeURIComponent(v) + '&format=json';
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// *** &accept-language=<%#= request.user_preferred_languages.join(',') %>
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// *** prefer current viewport
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$.getJSON(querystring, function(json) { _this._gotGeocode(json,field); });
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};
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r._gotGeocode=function(json,field) {
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if (json.length==0) {
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alert("Sorry, couldn't find that place."); // *** internationalise
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r[field.id]=null;
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return;
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}
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field.value=json[0].display_name;
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var lat=Number(json[0].lat), lon=Number(json[0].lon);
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r[field.id]=[lat,lon];
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// ** update markers
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};
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// Route-fetching UI
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r.requestRoute=function() {
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if (r.route_from && r.route_to) {
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r.chosenEngine.getRoute(true,[r.route_from,r.route_to]);
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// then, when the route has been fetched, it'll call the engine's gotRoute function
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}
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};
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// Take an array of Leaflet LatLngs and draw it as a polyline
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r.setPolyline=function(line) {
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if (r.polyline) map.removeLayer(r.polyline);
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r.polyline=L.polyline(line, ROUTING_POLYLINE).addTo(r.map);
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r.map.fitBounds(r.polyline.getBounds());
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};
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// Take an array of directions and write it out
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// (we use OSRM's route_instructions format)
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// *** translations?
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r.setItinerary=function(steps) {
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// Create base table
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$("#content").removeClass("overlay-sidebar");
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$('#sidebar_content').empty();
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var html='<h2><a class="geolink" href="#" onclick="$(~.close_directions~).click();return false;"><span class="icon close"></span></a>Directions</h2>'.replace(/~/g,"'");
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html+="<table id='turnbyturn' />";
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$('#sidebar_content').html(html);
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// Add each row
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var cumulative=0;
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for (var i=0; i<steps.length; i++) {
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var step=steps[i];
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var instCodes=step[0].split('-');
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// Assemble instruction text
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var instText="<b>"+(i+1)+".</b> ";
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instText+=TURN_INSTRUCTIONS[instCodes[0]];
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if (instCodes[1]) { instText+="exit "+instCodes[1]+" "; }
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if (instCodes[0]!=15) { instText+=step[1] ? "<b>"+step[1]+"</b>" : "(unnamed)"; }
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// Distance
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var dist=step[2];
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if (dist<5) { dist=""; }
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else if (dist<200) { dist=Math.round(dist/10)*10+"m"; }
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else if (dist<1500) { dist=Math.round(dist/100)*100+"m"; }
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else if (dist<5000) { dist=Math.round(dist/100)/10+"km"; }
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else { dist=Math.round(dist/1000)+"km"; }
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// Add to table
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var row=$("<tr class='turn'/>");
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row.append("<td class='direction i"+instCodes[0]+"'> ");
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row.append("<td class='instruction'>"+instText);
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row.append("<td class='distance'>"+dist);
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with ({num: i, dist: step[3]}) {
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row.on('click',function(e) {
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r.clickTurn(num, r.polyline.getLatLngs()[dist]);
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});
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};
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$('#turnbyturn').append(row);
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cumulative+=step[2];
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}
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};
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r.clickTurn=function(num,latlng) {
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L.popup().setLatLng(latlng).setContent("<p>"+(num+1)+"</p>").openOn(r.map);
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};
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// Close all routing UI
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r.close=function() {
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$("#content").addClass("overlay-sidebar");
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if (r.polyline) map.removeLayer(r.polyline);
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};
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// Routing engine handling
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// Add all engines
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var list=OSM.RoutingEngines.list;
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list.sort(function(a,b) { return a.name>b.name; });
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var select=r.jqSearch.find('select.routing_engines');
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for (var i=0; i<list.length; i++) {
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// Set up JSONP callback
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with ({num: i}) {
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list[num].requestJSONP=function(url) {
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var script = document.createElement('script');
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script.src = url+r.name+".gotRoute"+num;
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document.body.appendChild(script);
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};
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r['gotRoute'+num]=function(data) { list[num].gotRoute(r,data); };
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}
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select.append("<option value='"+i+"'>"+list[i].name+"</option>");
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}
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r.engines=list;
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r.chosenEngine=list[0]; // default to first engine
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// Choose an engine on dropdown change
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r.selectEngine=function(e) {
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r.chosenEngine=r.engines[e.target.selectedIndex];
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};
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// Choose an engine by name
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r.chooseEngine=function(name) {
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for (var i=0; i<r.engines.length; i++) {
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if (r.engines[i].name==name) {
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r.chosenEngine=r.engines[i];
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r.jqSearch.find('select.routing_engines').val(i);
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}
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}
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};
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return r;
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};
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