75 lines
1.7 KiB
HTML
75 lines
1.7 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<head>
|
|
<title>Loading...</title>
|
|
<meta charset="utf-8">
|
|
<script src="libmupdf.js"></script>
|
|
<script>
|
|
var filename = new URL(window.location.href).searchParams.get("file");
|
|
if (!filename)
|
|
filename = "pdfref13.pdf";
|
|
Module.preRun = function () {
|
|
FS.createPreloadedFile(".", filename, filename, true, false);
|
|
};
|
|
Module.postRun = function () {
|
|
loadDocument(filename);
|
|
};
|
|
|
|
var currentDocument = null;
|
|
var currentPage = 1;
|
|
var currentZoom = 72;
|
|
var pageCount = 0;
|
|
function loadDocument(filename) {
|
|
currentDocument = mupdf.openDocument(filename);
|
|
document.title = mupdf.documentTitle(currentDocument);
|
|
pageCount = mupdf.countPages(currentDocument);
|
|
updatePage();
|
|
}
|
|
function updatePage() {
|
|
document.getElementById("page").src = mupdf.drawPageAsPNG(currentDocument, currentPage, currentZoom);
|
|
document.getElementById("pageNumber").value = currentPage;
|
|
}
|
|
function nextPage() {
|
|
if (currentPage <= pageCount) {
|
|
++currentPage;
|
|
updatePage();
|
|
}
|
|
}
|
|
function prevPage() {
|
|
if (currentPage > 1) {
|
|
--currentPage;
|
|
updatePage();
|
|
}
|
|
}
|
|
function gotoPage() {
|
|
var page = parseInt(document.getElementById("pageNumber").value)
|
|
if (page >= 1 && page <= pageCount) {
|
|
currentPage = page;
|
|
updatePage();
|
|
}
|
|
}
|
|
function zoomIn() {
|
|
currentZoom *= 1.2;
|
|
updatePage();
|
|
}
|
|
function zoomOut() {
|
|
currentZoom /= 1.2;
|
|
updatePage();
|
|
}
|
|
</script>
|
|
<style>
|
|
body{margin:2em;background-color:#aaa}
|
|
</style>
|
|
</head>
|
|
<body>
|
|
<p>
|
|
<button onClick="prevPage()"><</button>
|
|
<input id="pageNumber" onChange="gotoPage()" type="text" size="5">
|
|
<button onClick="nextPage()">></button>
|
|
<button onClick="zoomIn()">+</button>
|
|
<button onClick="zoomOut()">-</button>
|
|
<p>
|
|
<img id="page">
|
|
</body>
|
|
</html>
|