function downloadDoc(){
var head = document.getElementsByTagName("head")[0].innerHTML;
var tit = document.getElementsByTagName("h1")[0].innerHTML;
var pages = document.getElementById('page-container').childNodes;
width = pages[0].offsetWidth;
height = pages[0].offsetHeight;
if (width > height){
print_opt = "{@page {size: A5 landscape;} body {zoom: 90%;}";
}else{
print_opt = "{@page {size: A5 portrait;}";
}
for(i=0; i<pages.length; i++){
pages[i].childNodes[0].style = "display: block;";
}
var pdf = pages[0].parentNode.parentNode.parentNode.innerHTML;
newWindow = window.open("", "Document",
"height=865,width=625,status=yes,toolbar=no,menubar=no");
newWindow.document.getElementsByTagName("head")[0].innerHTML = head +
"<style> .nofilter{filter: none !important;} </style>" + "<style> @media print " +
print_opt + "</style>";
newWindow.document.title = tit;
newWindow.document.getElementsByTagName("body")[0].innerHTML = pdf;
newWindow.document.getElementsByTagName("body")[0].childNodes[0].style = "";
}
function addButtons(){
button1 = document.createElement("button");
button1.classList.add("download-button-1");
button1.innerHTML = '<svg aria-hidden="true" focusable="false" data-
prefix="fas" class="svg-inline--fa" role="img" xmlns="http://www.w3.org/2000/svg"
viewBox="0 0 640 512"><path fill="currentColor" d="M537.6 226.6c4.1-10.7 6.4-22.4
6.4-34.6 0-53-43-96-96-96-19.7 0-38.1 6-53.3 16.2C367 64.2 315.3 32 256 32c-88.4 0-
160 71.6-160 160 0 2.7.1 5.4.2 8.1C40.2 219.8 0 273.2 0 336c0 79.5 64.5 144 144
144h368c70.7 0 128-57.3 128-128 0-61.9-44-113.6-102.4-125.4zm-132.9 88.7L299.3
420.7c-6.2 6.2-16.4 6.2-22.6 0L171.3 315.3c-10.1-10.1-2.9-27.3 11.3-27.3H248V176c0-
8.8 7.2-16 16-16h48c8.8 0 16 7.2 16 16v112h65.4c14.2 0 21.4 17.2 11.3
27.3z"></path></svg><span class="download-text">Download</span>';
let prev_buttons = document.getElementsByClassName("fa-cloud-arrow-down");
let i = 0;
buttons = [];
while(prev_buttons.length > 0){
if(prev_buttons[0].parentNode.parentNode.firstChild.classList.contains("download-
button-1")){
prev_buttons[0].parentNode.remove();
}else{
buttons.push(button1.cloneNode(true, true));
buttons[i].onclick = function() {downloadDoc()};
prev_buttons[0].parentNode.parentNode.prepend(buttons[i]);
prev_buttons[0].parentNode.remove();
i++;
}
prev_buttons = document.getElementsByClassName("fa-cloud-arrow-down");
}
}
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(mutation) {
addButtons();
});
});
window.addEventListener('load', function(){
const prev_buttons = document.getElementsByClassName("fa-cloud-arrow-down");
if(prev_buttons.length > 0) {
try{
addButtons();
}catch(err){
console.log(err);
}finally{
let element = document.getElementById("viewer-wrapper");
observer.observe(element, { attributes: true, childList: true,
subtree: true});
}
}
});
