# HG changeset patch
# User Matti Hamalainen <ccr@tnsp.org>
# Date 1521650353 -7200
# Node ID cdccda315a0f32fa1cfde345eba5f40095055ea5
# Parent  34c9eca1c7264f1432947a2e1a8ff972ff645166
Change mgalGetWindowSize() to mgalGetElementOrWindowSize(elemname) that
either returns size for given element by its id name, or the window size.

diff -r 34c9eca1c726 -r cdccda315a0f mgallery.js
--- a/mgallery.js	Wed Mar 21 18:07:42 2018 +0200
+++ b/mgallery.js	Wed Mar 21 18:39:13 2018 +0200
@@ -82,40 +82,43 @@
 }
 
 
-function mgalGetWindowSize()
+function mgalGetElementOrWindowSize(nelem)
 {
-  var winW = 0, winH = 0;
+  if (nelem)
+  {
+    var elem = document.getElementById(nelem);
+    if (elem)
+      return [elem.clientWidth, elem.clientHeight];
+  }
+
   if (typeof(window.innerWidth) == 'number')
   {
     // Non-MSIE
-    winW = window.innerWidth;
-    winH = window.innerHeight;
+    return [window.innerWidth, window.innerHeight];
   }
-  else
+
   if (document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight))
   {
     // MSIE 6+ in 'standards compliant mode'
-    winW = document.documentElement.clientWidth;
-    winH = document.documentElement.clientHeight;
+    return [document.documentElement.clientWidth, document.documentElement.clientHeight];
   }
-  else
+
   if (document.body && (document.body.clientWidth || document.body.clientHeight))
   {
     // MSIE 4 compatible
-    winW = document.body.clientWidth;
-    winH = document.body.clientHeight;
+    return [document.body.clientWidth, document.body.clientHeight];
   }
 
-  return [winW, winH];
+  return null;
 }
 
 
 function mgalAdjustImageDo()
 {
   var eimg = document.getElementById("imageImage");
-  var win = mgalGetWindowSize();
-  var madj = 0.92;
-  if (eimg)
+  var win = mgalGetElementOrWindowSize();
+  var madj = 0.90;
+  if (eimg && win != null)
   {
     if (eimg.width > eimg.height)
     {