From 5a118f1db16afd22cb3c066f07cc6333fa0f96b6 Mon Sep 17 00:00:00 2001
From: Andreas Unterkircher <unki@netshadow.at>
Date: Sat, 29 Mar 2008 11:39:53 +0100
Subject: issue112, enhanced preload functions for photo-index

Signed-off-by: Andreas Unterkircher <unki@netshadow.at>
---
 phpfspot.js                              | 29 +++++++++++++++++++----------
 themes/default/templates/photo_index.tpl | 17 ++++++++++++++---
 2 files changed, 33 insertions(+), 13 deletions(-)

diff --git a/phpfspot.js b/phpfspot.js
index 89eacba..f9f9703 100644
--- a/phpfspot.js
+++ b/phpfspot.js
@@ -427,23 +427,32 @@ function WSR_getElementsByClassName(oElm, strTagName, oClassNames){
 }
 
 
-function preloadPhotos(lbImg) {
+function preloadPhotos(image_url) {
 
-   var d=document;
-   if(d.images)
-      if(!d.photos)
-         d.photos=new Array();
-
-   var i, j=d.photos.length;
+   var i;
+   var timeout = 1000;
+   var waiting = 100;
+   var counting;
 
    lbImg=WSR_getElementsByClassName(document,"img","thumb");
    for(i=0;i<lbImg.length;i++){
-      d.photos[j]=new Image;
-      d.photos[j].src=lbImg[i].src;
-      j++;
+      lbImg[i].src=image_url[i];
+      // to not bomb the server with requests, give the page some time
+      // to load the images one by one. if a image exceeds the timeout,
+      // the next image will be loaded.
+      if(lbImg[i].complete != undefined && lbImg[i].complete != true) {
+         counting = 0;
+         while(lbImg[i].complete != true && counting < timeout) {
+            window.setTimeout("noop()", waiting);
+            counting+=waiting;
+         }
+      }
    }
 }
 
+/* a function that does nothing */
+function noop() {}
+
 function startSlideShow()
 {
    if(!sliding) {
diff --git a/themes/default/templates/photo_index.tpl b/themes/default/templates/photo_index.tpl
index 1a1a188..bf235d3 100644
--- a/themes/default/templates/photo_index.tpl
+++ b/themes/default/templates/photo_index.tpl
@@ -50,7 +50,7 @@
 
    <div class="thumb" onmouseover="setBackGrdColor(this, 'mouseover');" onmouseout="setBackGrdColor(this, 'mouseout');" style="width: { $thumb_container_width }px; height: { $thumb_container_height }px;">
     <a href="javascript:showImage({$images[thumb]}, 'scrollup');" id="thumblink{$images[thumb]}" name="image{$img_id[thumb]}" class="thumblink" onclick="click(this);" title="{$img_title[thumb]}">
-     <img class="thumb" id="thumbimg{$images[thumb]}" src="phpfspot_img.php?idx={$images[thumb]}&amp;width={$width}" alt="thumb_{$images[thumb]}" width="{$img_width[thumb]}" height="{$img_height[thumb]}" />
+     <img class="thumb" id="thumbimg{$images[thumb]}" width="{$img_width[thumb]}" height="{$img_height[thumb]}" />
      <br />
     {$img_name[thumb]}
     </a>
@@ -101,9 +101,20 @@
  </div>
 </div>
 <br class="clearboth" />
-<script type="text/javascript">
+<script type="text/javascript" language="JavaScript">
 <!--
-   preloadPhotos();
+   { counter start=-1 }
+
+   var current;
+   var image_urls = new Array();
+
+   {section name="thumb" loop=$thumbs step=1}
+      {if $images[thumb] }
+         image_urls[{counter}] = 'phpfspot_img.php?idx={$images[thumb]}&width={$width}';
+      {/if}
+   {/section}
+
+   preloadPhotos(image_urls);
 -->
 </script>
 <!-- /Photo Index -->
-- 
cgit v1.2.3-18-g5258


From 072aed3d53445a6b09edabf1551706de4c3f1cb1 Mon Sep 17 00:00:00 2001
From: Andreas Unterkircher <unki@netshadow.at>
Date: Sat, 29 Mar 2008 11:44:51 +0100
Subject: issue112, preload previous and next photo in single-photo view

Signed-off-by: Andreas Unterkircher <unki@netshadow.at>
---
 phpfspot.class.php                        | 1 +
 themes/default/templates/single_photo.tpl | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/phpfspot.class.php b/phpfspot.class.php
index be752ee..3b4a62e 100644
--- a/phpfspot.class.php
+++ b/phpfspot.class.php
@@ -546,6 +546,7 @@ class PHPFSPOT {
          $this->tmpl->assign('next_img', $next_img);
       }
       $this->tmpl->assign('mini_width', $this->cfg->mini_width);
+      $this->tmpl->assign('photo_width', $this->cfg->photo_width);
       $this->tmpl->assign('photo_number', $i);
       $this->tmpl->assign('photo_count', count($all_photos));
 
diff --git a/themes/default/templates/single_photo.tpl b/themes/default/templates/single_photo.tpl
index ea513d9..a16776e 100644
--- a/themes/default/templates/single_photo.tpl
+++ b/themes/default/templates/single_photo.tpl
@@ -103,6 +103,13 @@
 <!--
    if(autobrowse && document.getElementById("autobrowse_ico"))
       document.getElementById("autobrowse_ico").src = 'resources/32_pause.png';
+
+   /* lets preload to previous and the next image to speedup */
+   var image_next = new Image();
+   image_next.src = "phpfspot_img.php?idx={$next_img}&width={$photo_width}";
+   var image_prev = new Image();
+   image_prev.src = "phpfspot_img.php?idx={$prev_img}&width={$photo_width}";
+
 -->
 </script>
 <!-- /Single photo -->
-- 
cgit v1.2.3-18-g5258