2 lines
4.3 KiB
JavaScript
Executable File
2 lines
4.3 KiB
JavaScript
Executable File
var xhr=require('corslite'),csv2geojson=require('csv2geojson'),wellknown=require('wellknown'),polyline=require('polyline'),topojson=require('topojson'),toGeoJSON=require('togeojson');module.exports.polyline=polylineLoad;module.exports.polyline.parse=polylineParse;module.exports.geojson=geojsonLoad;module.exports.topojson=topojsonLoad;module.exports.topojson.parse=topojsonParse;module.exports.csv=csvLoad;module.exports.csv.parse=csvParse;module.exports.gpx=gpxLoad;module.exports.gpx.parse=gpxParse;module.exports.kml=kmlLoad;module.exports.kml.parse=kmlParse;module.exports.wkt=wktLoad;module.exports.wkt.parse=wktParse;function addData(l,d){if('setGeoJSON'in l){l.setGeoJSON(d)}else if('addData'in l){l.addData(d)}}function geojsonLoad(url,options,customLayer){var layer=customLayer||L.geoJson();xhr(url,function(err,response){if(err){return layer.fire('error',{error:err})}addData(layer,JSON.parse(response.responseText));layer.fire('ready')});return layer}function topojsonLoad(url,options,customLayer){var layer=customLayer||L.geoJson();xhr(url,onload);function onload(err,response){if(err){return layer.fire('error',{error:err})}topojsonParse(response.responseText,options,layer);layer.fire('ready')}return layer}function csvLoad(url,options,customLayer){var layer=customLayer||L.geoJson();xhr(url,onload);function onload(err,response){var error;if(err){return layer.fire('error',{error:err})}function avoidReady(){error=true}layer.on('error',avoidReady);csvParse(response.responseText,options,layer);layer.off('error',avoidReady);if(!error){layer.fire('ready')}}return layer}function gpxLoad(url,options,customLayer){var layer=customLayer||L.geoJson();xhr(url,onload);function onload(err,response){var error;if(err){return layer.fire('error',{error:err})}function avoidReady(){error=true}layer.on('error',avoidReady);gpxParse(response.responseXML||response.responseText,options,layer);layer.off('error',avoidReady);if(!error){layer.fire('ready')}}return layer}function kmlLoad(url,options,customLayer){var layer=customLayer||L.geoJson();xhr(url,onload);function onload(err,response){var error;if(err){return layer.fire('error',{error:err})}function avoidReady(){error=true}layer.on('error',avoidReady);kmlParse(response.responseXML||response.responseText,options,layer);layer.off('error',avoidReady);if(!error){layer.fire('ready')}}return layer}function wktLoad(url,options,customLayer){var layer=customLayer||L.geoJson();xhr(url,onload);function onload(err,response){if(err){return layer.fire('error',{error:err})}wktParse(response.responseText,options,layer);layer.fire('ready')}return layer}function polylineLoad(url,options,customLayer){var layer=customLayer||L.geoJson();xhr(url,onload);function onload(err,response){if(err){return layer.fire('error',{error:err})}polylineParse(response.responseText,options,layer);layer.fire('ready')}return layer}function topojsonParse(data,options,layer){var o=typeof data==='string'?JSON.parse(data):data;layer=layer||L.geoJson();for(var i in o.objects){var ft=topojson.feature(o,o.objects[i]);if(ft.features){addData(layer,ft.features)}else{addData(layer,ft)}}return layer}function csvParse(csv,options,layer){layer=layer||L.geoJson();options=options||{};csv2geojson.csv2geojson(csv,options,onparse);function onparse(err,geojson){if(err){return layer.fire('error',{error:err})}addData(layer,geojson)}return layer}function gpxParse(gpx,options,layer){var xml=parseXML(gpx);if(!xml){return layer.fire('error',{error:'Could not parse GPX'})}layer=layer||L.geoJson();var geojson=toGeoJSON.gpx(xml);addData(layer,geojson);return layer}function kmlParse(gpx,options,layer){var xml=parseXML(gpx);if(!xml){return layer.fire('error',{error:'Could not parse KML'})}layer=layer||L.geoJson();var geojson=toGeoJSON.kml(xml);addData(layer,geojson);return layer}function polylineParse(txt,options,layer){layer=layer||L.geoJson();options=options||{};var coords=polyline.decode(txt,options.precision);var geojson={type:'LineString',coordinates:[]};for(var i=0;i<coords.length;i+=1){geojson.coordinates[i]=[coords[i][1],coords[i][0]]}addData(layer,geojson);return layer}function wktParse(wkt,options,layer){layer=layer||L.geoJson();var geojson=wellknown(wkt);addData(layer,geojson);return layer}function parseXML(str){if(typeof str==='string'){return(new DOMParser()).parseFromString(str,'text/xml')}else{return str}}
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