app/assets/javascripts/index/directions-route-output.js

   1 OSM.DirectionsRouteOutput = function (map) {
   2   const popup = L.popup({ autoPanPadding: [100, 100] });
   3
   4   const polyline = L.polyline([], {
   5     color: "#03f",
   6     opacity: 0.3,
   7     weight: 10
   8   });
   9
  10   const highlight = L.polyline([], {
  11     color: "#ff0",
  12     opacity: 0.5,
  13     weight: 12
  14   });
  15
  16   let downloadURL = null;
  17
  18   function formatTotalDistance(m) {
  19     if (m < 1000) {
  20       return OSM.i18n.t("javascripts.directions.distance_m", { distance: Math.round(m) });
  21     } else if (m < 10000) {
  22       return OSM.i18n.t("javascripts.directions.distance_km", { distance: (m / 1000.0).toFixed(1) });
  23     } else {
  24       return OSM.i18n.t("javascripts.directions.distance_km", { distance: Math.round(m / 1000) });
  25     }
  26   }
  27
  28   function formatStepDistance(m) {
  29     if (m < 5) {
  30       return "";
  31     } else if (m < 200) {
  32       return OSM.i18n.t("javascripts.directions.distance_m", { distance: String(Math.round(m / 10) * 10) });
  33     } else if (m < 1500) {
  34       return OSM.i18n.t("javascripts.directions.distance_m", { distance: String(Math.round(m / 100) * 100) });
  35     } else if (m < 5000) {
  36       return OSM.i18n.t("javascripts.directions.distance_km", { distance: String(Math.round(m / 100) / 10) });
  37     } else {
  38       return OSM.i18n.t("javascripts.directions.distance_km", { distance: String(Math.round(m / 1000)) });
  39     }
  40   }
  41
  42   function formatHeight(m) {
  43     return OSM.i18n.t("javascripts.directions.distance_m", { distance: Math.round(m) });
  44   }
  45
  46   function formatTime(s) {
  47     let m = Math.round(s / 60);
  48     const h = Math.floor(m / 60);
  49     m -= h * 60;
  50     return h + ":" + (m < 10 ? "0" : "") + m;
  51   }
  52
  53   function writeSummary(route) {
  54     $("#directions_route_distance").val(formatTotalDistance(route.distance));
  55     $("#directions_route_time").val(formatTime(route.time));
  56     if (typeof route.ascend !== "undefined" && typeof route.descend !== "undefined") {
  57       $("#directions_route_ascend_descend").prop("hidden", false);
  58       $("#directions_route_ascend").val(formatHeight(route.ascend));
  59       $("#directions_route_descend").val(formatHeight(route.descend));
  60     } else {
  61       $("#directions_route_ascend_descend").prop("hidden", true);
  62       $("#directions_route_ascend").val("");
  63       $("#directions_route_descend").val("");
  64     }
  65   }
  66
  67   function writeSteps(route) {
  68     $("#directions_route_steps").empty();
  69
  70     for (const [i, [direction, instruction, dist, lineseg]] of route.steps.entries()) {
  71       const row = $("<tr class='turn'/>").appendTo($("#directions_route_steps"));
  72
  73       if (direction) {
  74         row.append("<td class='border-0'><svg width='20' height='20' class='d-block'><use href='#routing-sprite-" + direction + "' /></svg></td>");
  75       } else {
  76         row.append("<td class='border-0'>");
  77       }
  78       row.append(`<td><b>${i + 1}.</b> ${instruction}`);
  79       row.append("<td class='distance text-body-secondary text-end'>" + formatStepDistance(dist));
  80
  81       row.on("click", function () {
  82         popup
  83           .setLatLng(lineseg[0])
  84           .setContent(`<p><b>${i + 1}.</b> ${instruction}</p>`)
  85           .openOn(map);
  86       });
  87
  88       row
  89         .on("mouseenter", function () {
  90           highlight
  91             .setLatLngs(lineseg)
  92             .addTo(map);
  93         })
  94         .on("mouseleave", function () {
  95           map.removeLayer(highlight);
  96         });
  97     }
  98   }
  99
 100   const routeOutput = {};
 101
 102   routeOutput.write = function (route) {
 103     polyline
 104       .setLatLngs(route.line)
 105       .addTo(map);
 106
 107     writeSummary(route);
 108     writeSteps(route);
 109
 110     const blob = new Blob([JSON.stringify(polyline.toGeoJSON())], { type: "application/json" });
 111     URL.revokeObjectURL(downloadURL);
 112     downloadURL = URL.createObjectURL(blob);
 113     $("#directions_route_download").prop("href", downloadURL);
 114
 115     $("#directions_route_credit")
 116       .text(route.credit)
 117       .prop("href", route.creditlink);
 118   };
 119
 120   routeOutput.fit = function () {
 121     map.fitBounds(polyline.getBounds().pad(0.05));
 122   };
 123
 124   routeOutput.isVisible = function () {
 125     return map.hasLayer(polyline);
 126   };
 127
 128   routeOutput.remove = function () {
 129     map
 130       .removeLayer(popup)
 131       .removeLayer(polyline);
 132
 133     $("#directions_route_steps").empty();
 134
 135     URL.revokeObjectURL(downloadURL);
 136     $("#directions_route_download").prop("href", "");
 137   };
 138
 139   return routeOutput;
 140 };