add cookie

app/modules/anpdf/anpdf2.phtml

@@ -106,11 +106,11 @@ _tmr.push({id: "1069168", type: "pageView", start: (new Date()).getTime()});
 <div style="display: flex;flex-wrap:wrap;align-items:center;width: 100%;background: #f5f5f5;box-sizing: border-box;">
     <ul id="pdf-nav" style="font-size: 1.1em;width: 100%;font-weight:bold;display: flex;justify-content: center;padding:0px;">
       <?if (isset($prevurl)):?>
-        <li style="list-style-type:none;margin-right: 15px;float: left;border: 3px solid #2c2e35;border-radius: 28px;padding: 2px 10px;font-size: 1.3em;display: flex;align-items: center;"><a id="prevbutton" style="color:#2c2e35;text-decoration: none;" href="<?=$prevurl?>"><&nbsp;Предыдущая страница</a></li>
+        <li style="list-style-type:none;margin-right: 15px;float: left;border: 3px solid #2c2e35;border-radius: 28px;padding: 2px 10px;font-size: 1.3em;display: flex;align-items: center;"><a style="color:#2c2e35;text-decoration: none;" href="<?=$prevurl?>"><&nbsp;Предыдущая страница</a></li>
       <?endif?>
       <li style="list-style-type:none;color:#2c2e35;margin-right: 15px;float: left;font-size: 2em;"><?=$page?></li>
       <?if (isset($nexturl)):?>  
-        <li style="list-style-type:none;float: left;border: 3px solid #2c2e35;border-radius: 28px;padding: 2px 10px;font-size: 1.3em;display: flex;align-items: center;"><a id="nextbutton" style="color:#2c2e35;text-decoration: none;" href="<?=$nexturl?>">Следующая страница&nbsp;></a></li>
+        <li style="list-style-type:none;float: left;border: 3px solid #2c2e35;border-radius: 28px;padding: 2px 10px;font-size: 1.3em;display: flex;align-items: center;"><a style="color:#2c2e35;text-decoration: none;" href="<?=$nexturl?>">Следующая страница&nbsp;></a></li>
       <?endif?>
     </ul>
 </div>

app/pub/scripts/anviewer.js

@@ -3,6 +3,7 @@ var pdfjsLib = window['pdfjs-dist/build/pdf'];
 
 function renderPage() {
 
+
     document.getElementById('pdfprogress').innerHTML = 'Идет подготовка страницы ...';
 
     pageRendering = true;
@@ -36,30 +37,71 @@ function renderPage() {
     document.getElementById('zoompdf').innerHTML = scale + 'x';
     document.getElementById('pdfprogress').innerHTML = 'Приятного чтения ↓';
    
-    if (typeof prevlink !== 'undefined') 
+}  
-        document.getElementById('prevbutton').href = prevlink + '/'+ scale;
 
-    if (typeof nextlink !== 'undefined')    
+
-        document.getElementById('nextbutton').href = nextlink + '/'+ scale;
+function prevclick(){
+    prevurl = prevlink + '/'+ scale;
+    location.href = prevurl;
+    return;
+}
+
+function nextclick(){
+    nexturl = nextlink + '/'+ scale;
+    location.href = nexturl;
+    return;
 }
 
 
 function pdfzoomin(){
 
     scale += 0.25;
+    setzoom(scale);
     renderPage();
 
+
 }
 
 function pdfzoomout(){
 
     scale -= 0.25;
+    setzoom(scale);
     renderPage();
 
 }
 
+
+function getzoom(){
+
+  var cname = 'pdfscale';
+    
+  var results = document.cookie.match ( '(^|;) ?' + cname + '=([^;]*)(;|$)' );
+ 
+  if ( results )
+    return ( unescape ( results[2] ) );
+  else
+    return null;
+
+}
+
+function setzoom( cvalue, exdays = 30 ) {
+
+    var d = new Date();
+    d.setTime(d.getTime() + (exdays*24*60*60*1000));
+    
+    var cname = 'pdfscale';
+    document.cookie = cname + "=" + cvalue + "; expires=" + expires + "; path=/";
+    
+}
+
+
 function startpdfviewer(){
 
+    czoom = getzoom();
+
+    if (czoom !== null  ||  isNaN(czoom))
+        scale = czoom;
+    
     pdfjsLib.getDocument(url).promise.then(function(pdfDoc_) {
         pdfDoc = pdfDoc_;
         renderPage();