Fetch on resize: initial fetch considers min/max-widths

[openx] / jquery.openx.js

diff --git a/jquery.openx.js b/jquery.openx.js
index 3f3669f..a9827af 100644 (file)
--- a/jquery.openx.js
+++ b/jquery.openx.js
@@ -29,6 +29,9 @@
 
   count = 0,
   slots = {},
+  min_width = {},
+  max_width = {},
+  width,
   queue = [],
   output = [];
 
@@ -92,11 +95,13 @@
    * selector:      string  A selector for selecting the DOM-elements, that
    *                        should display ad-banners. DEFAULT: ".oa".
    *                        See: http://api.jquery.com/category/selectors/
+   * min_prefix:    string  Prefix for the encoding of the minmal width as
+   *                        CSS-classname. DEFAULT: "min_".
+   * max_prefix:    string  Prefix for the encoding of the maximal width as
+   *                        CSS-classname. DEFAULT: "max_".
    */
   $.openx = function( options ) {
 
-    var name, src, errors = [], i;
-
     if (domain) {
       if (console.error) {
         console.error('jQuery.openx was already initialized!');
@@ -111,12 +116,9 @@
 
     _options = options;
 
-    if (!options.server)
-      errors.push('Required option "server" is missing!');
-    if (errors.length > 0) {
+    if (!options.server) {
       if (console.error) {
-        for (i=0; i<errors.length; i++)
-          console.error('Required option "server" is missing!');
+        console.error('Required option "server" is missing!');
         console.log('options: ', options);
       }
       return;
@@ -128,6 +130,8 @@
         'delivery': '/www/delivery',
         'fl': 'fl.js',
         'selector': '.oa',
+        'min_prefix': 'min_',
+        'max_prefix': 'max_',
         'cache': true
       },
       options
@@ -148,9 +152,6 @@
      */
     $.ajaxSetup({ 'cache': true });
 
-
-    src = domain + settings.delivery + '/spc.php';
-
     /**
      * jQuery.openx only works with "named zones", because it does not know,
      * which zones belong to which website. For mor informations about
@@ -163,20 +164,53 @@
      * template - and does not have to worry about performance penalties due
      * to unnecessarily fetched banners.
      */
-    src += '?zones=';
     for(name in OA_zones) {
       $(settings.selector).each(function() {
         var
-        node = $(this),
-        id;
-        if (node.hasClass(name)) {
+        id,
+        classes,
+        i,
+        min = new RegExp('^' + settings.min_prefix + '([0-9]+)$'),
+        max = new RegExp('^' + settings.max_prefix + '([0-9]+)$'),
+        match;
+        if (this.id === name) {
           id = 'oa_' + ++count;
-          slots[id] = node;
-          queue.push(id);
-          src += escape(id + '=' + OA_zones[name] + "|");
+          slots[id] = this;
+          min_width[id] = 0;
+          max_width[id] = Number.MAX_VALUE;
+          classes = this.className.split(/\s+/);
+          for (i=0; i<classes.length; i++) {
+            match = min.exec(classes[i]);
+            if (match)
+              min_width[id] = match[1];
+            match = max.exec(classes[i]);
+            if (match)
+              max_width[id] = match[1];
+          }
         }
       });
     }
+
+    /** Set initial window-width */
+    width = $(document).width();
+
+    /** Fetch the JavaScript for Flash and schedule the initial fetch */
+    $.getScript(domain + settings.delivery + '/' + settings.fl, fetch_ads);
+
+  }
+
+  function fetch_ads() {
+
+    var name, src = domain + settings.delivery + '/spc.php';
+
+    /** Order banners for all zones that were found on the page */
+    src += '?zones=';
+    for(id in slots) {
+      if (width >= min_width[id] && width <= max_width[id]) {
+        queue.push(id);
+        src += escape(id + '=' + OA_zones[slots[id].id] + "|");
+      }
+    }
     src += '&nz=1'; // << We want to fetch named zones!
 
     /**
@@ -203,14 +237,8 @@
     if (typeof OA_source !== 'undefined')
       src += "&source=" + escape(OA_source);
 
-    /** Chain-load the scripts (next script to load is fl.js */
-    $.getScript(src, load_flash);
-
-  }
-
-  function load_flash() {
-
-    $.getScript(domain + settings.delivery + '/' + settings.fl, init_ads);
+    /** Fetch data from OpenX and schedule the render-preparation */
+    $.getScript(src, init_ads);
 
   }
 
@@ -238,7 +266,7 @@
       var result, src, inline;
 
       id = queue.shift();
-      node = slots[id];
+      node = $(slots[id]);
 
       node.slideDown();