leaflet-kmz/src/utils.min.js

A KMZ file loader for Leaflet Maps

'use strict';export function loadFile(url){return new Promise((resolve,reject)=>{let xhr=new XMLHttpRequest;xhr.open("GET",url);xhr.setRequestHeader("X-Requested-With","XMLHttpRequest");xhr.responseType="arraybuffer";xhr.onload=()=>{if(xhr.readyState===4&&(xhr.status===200||xhr.status===0))resolve(xhr.response||xhr.responseText);else resolve("")};xhr.onerror=()=>reject("Error "+xhr.status+" while fetching remote file: "+url);xhr.send()})}
export function getKmlDoc(files){return files["doc.kml"]?"doc.kml":getKmlFiles(Object.keys(files))[0]}export function getKmlFiles(files){return files.filter((file)=>isKmlFile(file))}export function getImageFiles(files){return files.filter((file)=>isImageFile(file))}export function getFileExt(filename){return filename.split(".").pop().toLowerCase().replace("jpg","jpeg")}export function getFileName(url){return url.split("/").pop()}
export function getMimeType(filename,ext){var mime="text/plain";if(/\.(jpe?g|png|gif|bmp)$/i.test(filename))mime="image/"+ext;else if(/\.kml$/i.test(filename))mime="text/plain";return mime}export function isImageFile(filename){return/\.(jpe?g|png|gif|bmp)$/i.test(filename)}export function isKmlFile(filename){return/.*\.kml/.test(filename)}export function isZipped(file){return"PK"===String.fromCharCode(new Uint8Array(file,0,1),new Uint8Array(file,1,1))}
export function lazyLoader(urls,promise){return promise instanceof Promise?promise:Promise.all(urls.map((url)=>loadJS(url)))}export function loadJS(url){return new Promise((resolve,reject)=>{let tag=document.createElement("script");tag.addEventListener("load",resolve.bind(url),{once:true});tag.src=url;document.head.appendChild(tag)})}
export function parseLatLonBox(xml){let box=L.latLngBounds([xml.getElementsByTagName("south")[0].childNodes[0].nodeValue,xml.getElementsByTagName("west")[0].childNodes[0].nodeValue],[xml.getElementsByTagName("north")[0].childNodes[0].nodeValue,xml.getElementsByTagName("east")[0].childNodes[0].nodeValue]);let rotation=xml.getElementsByTagName("rotation")[0];if(rotation!==undefined)rotation=parseFloat(rotation.childNodes[0].nodeValue);return[box,rotation]}
export function parseGroundOverlay(xml,props){let [bounds,rotation]=parseLatLonBox(xml.getElementsByTagName("LatLonBox")[0]);let href=xml.getElementsByTagName("href")[0];let color=xml.getElementsByTagName("color")[0];let icon=xml.getElementsByTagName("Icon")[0];let options={};if(!href&&icon)href=icon.getElementsByTagName("href")[0];href=href.childNodes[0].nodeValue;href=props.icons[href]||href;if(color){color=color.childNodes[0].nodeValue;options.opacity=parseInt(color.substring(0,2),16)/255;options.color=
"#"+color.substring(6,8)+color.substring(4,6)+color.substring(2,4)}if(rotation)options.rotation=rotation;return new L.KMZImageOverlay(href,bounds,{opacity:options.opacity,angle:options.rotation})}export function toGeoJSON(data,props){var xml=data instanceof XMLDocument?data:toXML(data);var json=window.toGeoJSON.kml(xml);json.properties=L.extend({},json.properties,props||{});return json}
export function toXML(data){var text=data;if(data instanceof ArrayBuffer){text=String.fromCharCode.apply(null,new Uint8Array(data));var encoding=text.substring(0,text.indexOf("?>")).match(/encoding\s*=\s*["'](.*)["']/i);if(encoding)text=(new TextDecoder(encoding[1])).decode(data)}return text?(new DOMParser).parseFromString(text,"text/xml"):document.implementation.createDocument(null,"kml")}
export function unzip(folder){return new Promise((resolve,reject)=>{window.JSZip.loadAsync(folder).then((zip)=>{var files=Object.keys(zip.files).map((name)=>{var entry=zip.files[name];if(isImageFile(name)){var ext=getFileExt(name);var mime=getMimeType(name,ext);return entry.async("base64").then((value)=>[name,"data:"+mime+";base64,"+value])}return entry.async("text").then((value)=>[name,value])});Promise.all(files).then((list)=>resolve(list.reduce((obj,item)=>{obj[item[0]]=item[1];return obj},{})))})})};