openstreetmap-website/app/assets/javascripts/osm.js.erb

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//= depend_on application.yml
OSM = {
<% if defined?(PIWIK) %>
PIWIK: <%= PIWIK.to_json %>,
<% end %>
MAX_REQUEST_AREA: <%= MAX_REQUEST_AREA.to_json %>,
SERVER_URL: <%= SERVER_URL.to_json %>,
API_VERSION: <%= API_VERSION.to_json %>,
STATUS: <%= STATUS.to_json %>,
MAX_NOTE_REQUEST_AREA: <%= MAX_NOTE_REQUEST_AREA.to_json %>,
OVERPASS_URL: <%= OVERPASS_URL.to_json %>,
NOMINATIM_URL: <%= NOMINATIM_URL.to_json %>,
<% if defined?(MAPQUEST_KEY) %>
MAPQUEST_KEY: <%= MAPQUEST_KEY.to_json %>,
<% end %>
<% if defined?(MAPZEN_VALHALLA_KEY) %>
MAPZEN_VALHALLA_KEY: <%= MAPZEN_VALHALLA_KEY.to_json %>,
<% end %>
MARKER_GREEN: <%= image_path("marker-green.png").to_json %>,
MARKER_RED: <%= image_path("marker-red.png").to_json %>,
MARKER_ICON: <%= image_path("images/marker-icon.png").to_json %>,
MARKER_ICON_2X: <%= image_path("images/marker-icon-2x.png").to_json %>,
MARKER_SHADOW: <%= image_path("images/marker-shadow.png").to_json %>,
NEW_NOTE_MARKER: <%= image_path("new_note_marker.png").to_json %>,
OPEN_NOTE_MARKER: <%= image_path("open_note_marker.png").to_json %>,
CLOSED_NOTE_MARKER: <%= image_path("closed_note_marker.png").to_json %>,
apiUrl: function (object) {
var url = "/api/" + OSM.API_VERSION + "/" + object.type + "/" + object.id;
if (object.type === "way" || object.type === "relation") {
url += "/full";
} else if (object.version) {
url += "/" + object.version;
}
return url;
},
params: function(search) {
var params = {};
search = (search || window.location.search).replace('?', '').split(/&|;/);
for (var i = 0; i < search.length; ++i) {
var pair = search[i],
j = pair.indexOf('='),
key = pair.slice(0, j),
val = pair.slice(++j);
params[key] = decodeURIComponent(val);
}
return params;
},
mapParams: function (search) {
var params = OSM.params(search), mapParams = {}, loc, match;
if (params.mlon && params.mlat) {
mapParams.marker = true;
mapParams.mlon = parseFloat(params.mlon);
mapParams.mlat = parseFloat(params.mlat);
}
// Old-style object parameters; still in use for edit links e.g. /edit?way=1234
if (params.node) {
mapParams.object = {type: 'node', id: parseInt(params.node)};
} else if (params.way) {
mapParams.object = {type: 'way', id: parseInt(params.way)};
} else if (params.relation) {
mapParams.object = {type: 'relation', id: parseInt(params.relation)};
}
var hash = OSM.parseHash(location.hash);
// Decide on a map starting position. Various ways of doing this.
if (hash.center) {
mapParams.lon = hash.center.lng;
mapParams.lat = hash.center.lat;
mapParams.zoom = hash.zoom;
} else if (params.bbox) {
var bbox = params.bbox.split(',');
mapParams.bounds = L.latLngBounds(
[parseFloat(bbox[1]), parseFloat(bbox[0])],
[parseFloat(bbox[3]), parseFloat(bbox[2])]);
} else if (params.minlon && params.minlat && params.maxlon && params.maxlat) {
mapParams.bounds = L.latLngBounds(
[parseFloat(params.minlat), parseFloat(params.minlon)],
[parseFloat(params.maxlat), parseFloat(params.maxlon)]);
} else if (params.mlon && params.mlat) {
mapParams.lon = parseFloat(params.mlon);
mapParams.lat = parseFloat(params.mlat);
mapParams.zoom = parseInt(params.zoom || 12);
} else if (loc = $.cookie('_osm_location')) {
loc = loc.split("|");
mapParams.lon = parseFloat(loc[0]);
mapParams.lat = parseFloat(loc[1]);
mapParams.zoom = parseInt(loc[2]);
} else if (OSM.home) {
mapParams.lon = OSM.home.lon;
mapParams.lat = OSM.home.lat;
mapParams.zoom = 10;
} else if (OSM.location) {
mapParams.bounds = L.latLngBounds(
[OSM.location.minlat,
OSM.location.minlon],
[OSM.location.maxlat,
OSM.location.maxlon]);
} else {
mapParams.lon = -0.1;
mapParams.lat = 51.5;
mapParams.zoom = parseInt(params.zoom || 5);
}
mapParams.layers = hash.layers || (loc && loc[3]) || '';
var scale = parseFloat(params.scale);
if (scale > 0) {
mapParams.zoom = Math.log(360.0 / (scale * 512.0)) / Math.log(2.0);
}
return mapParams;
},
parseHash: function(hash) {
var args = {};
var i = hash.indexOf('#');
if (i < 0) {
return args;
}
hash = querystring.parse(hash.substr(i + 1));
var map = (hash.map || '').split('/'),
zoom = parseInt(map[0], 10),
lat = parseFloat(map[1]),
lon = parseFloat(map[2]);
if (!isNaN(zoom) && !isNaN(lat) && !isNaN(lon)) {
args.center = new L.LatLng(lat, lon);
args.zoom = zoom;
}
if (hash.layers) {
args.layers = hash.layers;
}
return args;
},
formatHash: function(args) {
var center, zoom, layers;
if (args instanceof L.Map) {
center = args.getCenter();
zoom = args.getZoom();
layers = args.getLayersCode();
} else {
center = args.center || L.latLng(args.lat, args.lon);
zoom = args.zoom;
layers = args.layers || '';
}
center = center.wrap();
layers = layers.replace('M', '');
var precision = OSM.zoomPrecision(zoom),
hash = '#map=' + zoom +
'/' + center.lat.toFixed(precision) +
'/' + center.lng.toFixed(precision);
if (layers) {
hash += '&layers=' + layers;
}
return hash;
},
zoomPrecision: function(zoom) {
return Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
},
locationCookie: function(map) {
var center = map.getCenter().wrap(),
zoom = map.getZoom(),
precision = OSM.zoomPrecision(zoom);
return [center.lng.toFixed(precision), center.lat.toFixed(precision), zoom, map.getLayersCode()].join('|');
},
distance: function(latlng1, latlng2) {
var lat1 = latlng1.lat * Math.PI / 180,
lng1 = latlng1.lng * Math.PI / 180,
lat2 = latlng2.lat * Math.PI / 180,
lng2 = latlng2.lng * Math.PI / 180,
latdiff = lat2 - lat1,
lngdiff = lng2 - lng1;
return 6372795 * 2 * Math.asin(
Math.sqrt(
Math.pow(Math.sin(latdiff / 2), 2) +
Math.cos(lat1) * Math.cos(lat2) * Math.pow(Math.sin(lngdiff / 2), 2)
));
}
};