wicket.js
4.81 KB
var Wkt=function(){return{delimiter:" ",isArray:function(obj){return!!(obj&&obj.constructor==Array)},Wkt:function(initializer){var beginsWith,endsWith,trim;beginsWith=function(str,sub){return str.substring(0,sub.length)===sub};endsWith=function(str,sub){return str.substring(str.length-sub.length)===sub};trim=function(str,sub){sub=sub||" ";while(beginsWith(str,sub))str=str.substring(1);while(endsWith(str,sub))str=str.substring(0,str.length-1);return str};this.delimiter=Wkt.delimiter;this.regExes={typeStr:/^\s*(\w+)\s*\(\s*(.*)\s*\)\s*$/,
spaces:/\s+|\+/,numeric:/-*\d+\.*\d+/,comma:/\s*,\s*/,parenComma:/\)\s*,\s*\(/,doubleParenComma:/\)\s*\)\s*,\s*\(\s*\(/,trimParens:/^\s*\(?(.*?)\)?\s*$/};this.isCollection=function(){switch(this.type.slice(0,5)){case "multi":return true;case "polyg":return true;default:return false}};this.components=undefined;this.fromObject=function(obj){var result=this.deconstruct.call(this,obj);this.components=result.components;this.isRectangle=result.isRectangle||false;this.type=result.type;return this};this.toObject=
function(config){return this.construct[this.type].call(this,config)};this.read=function(wkt){var matches;matches=this.regExes.typeStr.exec(wkt);if(matches){this.type=matches[1].toLowerCase();this.base=matches[2];if(this.ingest[this.type])this.components=this.ingest[this.type].apply(this,[this.base])}else{console.log("Invalid WKT string provided to read()");throw{name:"WKTError",message:"Invalid WKT string provided to read()"};}return this.components};this.write=function(components){var i,pieces,data;
components=components||this.components;pieces=[];pieces.push(this.type.toUpperCase()+"(");for(i=0;i<components.length;i+=1){if(this.isCollection()&&i>0)pieces.push(",");if(!this.extract[this.type])return null;
//alterado por edmar moretti
if(components[i].length == 1){
data = this.extract[this.type].apply(this, [components[i][0]]);
}
else{
data = this.extract[this.type].apply(this, [components[i]]);
}
if(this.isCollection())pieces.push("("+data+")");else{pieces.push(data);if(i!==components.length-1)pieces.push(",")}}pieces.push(")");return pieces.join("")};this.extract={point:function(point){return point.x+this.delimiter+point.y},multipoint:function(multipoint){var i,
parts=[];for(i=0;i<multipoint.length;i+=1)parts.push(this.extract.point.apply(this,[multipoint[i]]));return parts.join(",")},linestring:function(linestring){return this.extract.point.apply(this,[linestring])},multilinestring:function(multilinestring){var i,parts=[];for(i=0;i<multilinestring.length;i+=1)parts.push("("+this.extract.linestring.apply(this,[multilinestring[i]])+")");return parts.join(",")},polygon:function(polygon){return this.extract.multipoint.apply(this,[polygon])},multipolygon:function(multipolygon){var i,
parts=[];for(i=0;i<multipolygon.length;i+=1)parts.push("("+this.extract.polygon.apply(this,[multipolygon[i]])+")");return parts.join(",")}};this.ingest={point:function(str){var coords=trim(str).split(this.regExes.spaces);return[{x:parseFloat(this.regExes.numeric.exec(coords[0])[0]),y:parseFloat(this.regExes.numeric.exec(coords[1])[0])}]},multipoint:function(str){var i,components,points;components=[];points=trim(str).split(this.regExes.comma);for(i=0;i<points.length;i+=1)components.push(this.ingest.point.apply(this,
[points[i]]));return components},linestring:function(str){var i,multipoints,components;multipoints=this.ingest.multipoint.apply(this,[str]);components=[];for(i=0;i<multipoints.length;i+=1)components=components.concat(multipoints[i]);return components},multilinestring:function(str){var i,components,line,lines;components=[];lines=trim(str).split(this.regExes.parenComma);for(i=0;i<lines.length;i+=1){line=lines[i].replace(this.regExes.trimParens,"$1");components.push(this.ingest.linestring.apply(this,
[line]))}return components},polygon:function(str){var i,j,components,subcomponents,ring,rings;rings=trim(str).split(this.regExes.parenComma);components=[];for(i=0;i<rings.length;i+=1){ring=rings[i].replace(this.regExes.trimParens,"$1").split(this.regExes.comma);subcomponents=[];for(j=0;j<ring.length;j+=1)subcomponents.push({x:parseFloat(ring[j].split(this.regExes.spaces)[0]),y:parseFloat(ring[j].split(this.regExes.spaces)[1])});components.push(subcomponents)}return components},multipolygon:function(str){var i,
components,polygon,polygons;components=[];polygons=trim(str).split(this.regExes.doubleParenComma);for(i=0;i<polygons.length;i+=1){polygon=polygons[i].replace(this.regExes.trimParens,"$1");components.push(this.ingest.polygon.apply(this,[polygon]))}return components},geometrycollection:function(str){console.log("The geometrycollection WKT type is not yet supported.")}};if(initializer&&typeof initializer==="string")this.read(initializer);else if(this.fromGeometry)this.fromGeometry(initializer)}}}();