improvement: tags replace keywords. Better data model, less

limitations. Each image can be associated to as many tag as needed. Tags can
contain non ASCII characters. Oriented navigation with tags by association.


git-svn-id: http://piwigo.org/svn/trunk@1119 68402e56-0260-453c-a942-63ccdbb3a9ee

include/functions_html.inc.php

@@ -5,7 +5,6 @@
 // | Copyright (C) 2003-2005 PhpWebGallery Team - http://phpwebgallery.net |
 // +-----------------------------------------------------------------------+
 // | branch        : BSF (Best So Far)
-// | file          : $Id$
 // | last update   : $Date$
 // | last modifier : $Author$
 // | revision      : $Revision$
@@ -494,6 +493,56 @@ function get_cat_display_name_from_id($cat_id,
   return get_cat_display_name($cat_info['name'], $url, $replace_space);
 }
 
+/**
+ * Returns an HTML list of tags. It can be a multi select field or a list of
+ * checkboxes.
+ *
+ * @param string HTML field name
+ * @param array selected tag ids
+ * @return array
+ */
+function get_html_tag_selection(
+  $tags,
+  $fieldname,
+  $selecteds = array(),
+  $forbidden_categories = null
+  )
+{
+  global $conf;
+  
+  $output = '<ul class="tagSelection">';
+  foreach ($tags as $tag)
+  {
+    $output.=
+      '<li>'
+      .'<label>'
+      .'<input type="checkbox" name="'.$fieldname.'[]"'
+      .' value="'.$tag['tag_id'].'"'
+      ;
+
+    if (in_array($tag['tag_id'], $selecteds))
+    {
+      $output.= ' checked="checked"';
+    }
+    
+    $output.=
+      ' />'
+      .' '.$tag['name']
+      .'</label>'
+      .'</li>'
+      ."\n"
+      ;
+  }
+  $output.= '</ul>';
+
+  return $output;
+}
+
+function name_compare($a, $b)
+{
+  return strcmp($a['name'], $b['name']);
+}
+
 /**
  * exits the current script (either exit or redirect)
  */
@@ -519,4 +568,4 @@ function access_denied()
     redirect($login_url);
   }
 }
-?>
+?>