openstreetmap-website/app/assets/javascripts/routing.js.erb
2014-01-22 12:52:51 +00:00

191 lines
5.6 KiB
Text

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