3 files changed, 108 insertions, 4 deletions

diff --git a/src/SemanticScuttle/Model/Theme.php b/src/SemanticScuttle/Model/Theme.php
new file mode 100644
index 0000000..a2f4973
--- /dev/null
+++ b/src/SemanticScuttle/Model/Theme.php
@@ -0,0 +1,97 @@
+<?php
+/**
+ * SemanticScuttle - your social bookmark manager.
+ *
+ * PHP version 5.
+ *
+ * @category Bookmarking
+ * @package  SemanticScuttle
+ * @author   Christian Weiske <cweiske@cweiske.de>
+ * @license  AGPL v3 or later http://www.gnu.org/licenses/agpl.html
+ * @link     http://sourceforge.net/projects/semanticscuttle
+ */
+
+/**
+ * A theme, the visual representation of SemanticScuttle.
+ *
+ * @category Bookmarking
+ * @package  SemanticScuttle
+ * @author   Christian Weiske <cweiske@cweiske.de>
+ * @license  AGPL v3 or later http://www.gnu.org/licenses/agpl.html
+ * @link     http://sourceforge.net/projects/semanticscuttle
+ */
+class SemanticScuttle_Model_Theme
+{
+    /**
+     * Theme name. Also the path part of template and resource files
+     *
+     * @var string
+     */
+    protected $name = null;
+
+    /**
+     * Local path to the www themes directory.
+     * Needs to have a trailing slash.
+     *
+     * @var string
+     */
+    protected $wwwThemeDir = null;
+
+
+
+    /**
+     * Create a new theme instance.
+     *
+     * @param string $name Theme name "data/templates/(*)/"
+     */
+    public function __construct($name = 'default')
+    {
+        $this->name = $name;
+        $this->wwwThemeDir = $GLOBALS['wwwdir'] . '/themes/';
+        //TODO: implement theme hierarchies with parent fallback
+    }
+
+
+
+    /**
+     * Returns the URL path to a resource file (www/themes/$name/$file).
+     * Automatically falls back to the parent theme if the file does not exist
+     * in the theme.
+     *
+     * Must always be used when adding i.e. images to the output.
+     *
+     * @param string $file File name to find the path for
+     *
+     * @return string Full path
+     */
+    public function resource($file)
+    {
+        $themeFile = $this->wwwThemeDir . $this->name . '/' . $file;
+        if (file_exists($themeFile)) {
+            return ROOT . 'themes/' . $this->name . '/' . $file;
+        }
+
+        $defaultFile = $this->wwwThemeDir . 'default/' . $file;
+        if (file_exists($defaultFile)) {
+            return ROOT . 'themes/default/' . $file;
+        }
+
+        //file does not exist. fall back to the theme file
+        // to guide the theme author a bit.
+        // TODO: logging. in admin mode, there should be a message
+        return ROOT . 'themes/' . $this->name . '/' . $file;
+    }
+
+
+
+    /**
+     * Returns the theme name.
+     *
+     * @return string Theme name
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+}
+?>
\ No newline at end of file
diff --git a/src/SemanticScuttle/Service/Template.php b/src/SemanticScuttle/Service/Template.php
index 2a683d6..b5d4cfa 100644
--- a/src/SemanticScuttle/Service/Template.php
+++ b/src/SemanticScuttle/Service/Template.php
@@ -14,6 +14,7 @@
  */
 
 require_once 'SemanticScuttle/Model/Template.php';
+require_once 'SemanticScuttle/Model/Theme.php';
 
 /**
  * SemanticScuttle template service.
@@ -40,9 +41,9 @@ class SemanticScuttle_Service_Template extends SemanticScuttle_Service
 
     /**
      * The template theme to use.
-     * Set in constructor from $GLOBALS['theme']
+     * Set in constructor based on $GLOBALS['theme']
      *
-     * @var string
+     * @var SemanticScuttle_Model_Theme
      */
     protected $theme;
 
@@ -72,7 +73,7 @@ class SemanticScuttle_Service_Template extends SemanticScuttle_Service
     protected function __construct()
     {
         $this->basedir = $GLOBALS['TEMPLATES_DIR'];
-        $this->theme   = $GLOBALS['theme'];
+        $this->theme   = new SemanticScuttle_Model_Theme($GLOBALS['theme']);
         //FIXME: verify the theme exists
     }
 
@@ -84,6 +85,8 @@ class SemanticScuttle_Service_Template extends SemanticScuttle_Service
      * @param string $template Template filename relative
      *                         to template dir
      * @param array  $vars     Array of template variables.
+     *                         The current theme object will be added
+     *                         automatically with name "theme".
      *
      * @return SemanticScuttle_Model_Template Template object
      */
@@ -95,12 +98,13 @@ class SemanticScuttle_Service_Template extends SemanticScuttle_Service
 
         $oldIncPath = get_include_path();
         set_include_path(
-            $this->basedir . $this->theme
+            $this->basedir . $this->theme->getName()
             . PATH_SEPARATOR . $this->basedir . 'default'
             //needed since services are instantiated in templates
             . PATH_SEPARATOR . $oldIncPath
         );
 
+        $vars['theme'] = $this->theme;
         $tpl = new SemanticScuttle_Model_Template(
             $template, $vars, $this
         );
diff --git a/src/SemanticScuttle/header.php b/src/SemanticScuttle/header.php
index 098e5c3..6c0d4df 100644
--- a/src/SemanticScuttle/header.php
+++ b/src/SemanticScuttle/header.php
@@ -18,9 +18,12 @@
 if ('@data_dir@' == '@' . 'data_dir@') {
     //non pear-install
     $datadir = dirname(__FILE__) . '/../../data/';
+    $wwwdir  = dirname(__FILE__) . '/../../www/';
 } else {
     //pear installation; files are in include path
     $datadir = '@data_dir@/SemanticScuttle/';
+    //FIXME: when you have multiple installations, the www_dir will be wrong
+    $wwwdir  = '@www_dir@/SemanticScuttle/';
 }
 
 if (!file_exists($datadir . '/config.php')) {