1 line
2.9 KiB
JavaScript
1 line
2.9 KiB
JavaScript
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L.GeoCSV=L.GeoJSON.extend({options:{titles:["lat","lng","popup"],latitudeTitle:"lat",longitudeTitle:"lng",fieldSeparator:";",lineSeparator:"\n",deleteDoubleQuotes:true,firstLineTitles:false},_propertiesNames:[],initialize:function(csv,options){this._propertiesNames=[];L.Util.setOptions(this,options);L.GeoJSON.prototype.initialize.call(this,csv,options)},addData:function(data){if(typeof data==="string"){var titulos=this.options.titles;if(this.options.firstLineTitles){data=data.split(this.options.lineSeparator);if(data.length<2)return;titulos=data[0];data.splice(0,1);data=data.join(this.options.lineSeparator);titulos=titulos.trim().split(this.options.fieldSeparator);for(var i=0;i<titulos.length;i++){titulos[i]=this._deleteDoubleQuotes(titulos[i])}this.options.titles=titulos}for(var i=0;i<titulos.length;i++){var prop=titulos[i].toLowerCase().replace(/[^\w ]+/g,"").replace(/ +/g,"_");if(prop==""||prop=="_")prop="prop-"+i;this._propertiesNames[i]=prop}data=this._csv2json(data)}return L.GeoJSON.prototype.addData.call(this,data)},getPropertyName:function(title){var pos=this.options.titles.indexOf(title),prop="";if(pos>=0)prop=this._propertiesNames[pos];return prop},getPropertyTitle:function(prop){var pos=this._propertiesNames.indexOf(prop),title="";if(pos>=0)title=this.options.titles[pos];return title},_deleteDoubleQuotes:function(cadena){if(this.options.deleteDoubleQuotes)cadena=cadena.trim().replace(/^"/,"").replace(/"$/,"");return cadena},_csv2array:function(str){var arr=[];var quote=false;for(var row=col=c=0;c<str.length;c++){var cc=str[c],nc=str[c+1];arr[row]=arr[row]||[];arr[row][col]=arr[row][col]||"";if(cc=='"'&"e&&nc=='"'){arr[row][col]+=cc;++c;continue}if(cc=='"'){quote=!quote;continue}if(cc==this.options.fieldSeparator&&!quote){++col;continue}if(cc=="\r"&&nc==this.options.lineSeparator&&!quote){++row;col=0;++c;continue}if(cc==this.options.lineSeparator&&!quote){++row;col=0;continue}if(cc=="\r"&&!quote){++row;col=0;continue}arr[row][col]+=cc}return arr},_csv2json:function(csv){var json={};json["type"]="FeatureCollection";json["features"]=[];var titulos=this.options.titles;csv=this._csv2array(csv);for(var num_linea=0;num_linea<csv.length;num_linea++){var campos=csv[num_linea],lng=parseFloat(campos[titulos.indexOf(this.options.longitudeTitle)]),lat=parseFloat(campos[titulos.indexOf(this.options.latitudeTitle)]);if(campos.length==titulos.length&&lng<180&&lng>-180&&lat<90&&lat>-90){var feature={};feature["type"]="Feature";feature["geometry"]={};feature["properties"]={};feature["geometry"]["type"]="Point";feature["geometry"]["coordinates"]=[lng,lat];for(var i=0;i<titulos.length;i++){if(titulos[i]!=this.options.latitudeTitle&&titulos[i]!=this.options.longitudeTitle){feature["properties"][this._propertiesNames[i]]=this._deleteDoubleQuotes(campos[i])}}json["features"].push(feature)}}return json}});L.geoCsv=function(csv_string,options){return new L.GeoCSV(csv_string,options)};
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