From b6f26e58fd9152223221febf407fee5529244ffe Mon Sep 17 00:00:00 2001
From: mattab <matthieu.aubry@gmail.com>
Date: Fri, 22 Nov 2013 17:01:07 +1300
Subject: Refs #4127 Implementing possibility for Themes to overwrite any icon
 or resource by putting the new file in plugins/$ThemeName/XX - Morpheus theme
 now displays its icons! :)

---
 core/Theme.php | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 core/Theme.php

(limited to 'core/Theme.php')

diff --git a/core/Theme.php b/core/Theme.php
new file mode 100644
index 0000000000..1b69b57c59
--- /dev/null
+++ b/core/Theme.php
@@ -0,0 +1,95 @@
+<?php
+/**
+ * Piwik - Open source web analytics
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ * @category Piwik
+ * @package Piwik
+ */
+namespace Piwik;
+
+/**
+ * This class contains logic to make Themes work beautifully.
+ *
+ * @package Piwik
+ */
+class Theme
+{
+    /** @var string  */
+    private $themeName;
+
+    /** @var \Piwik\Plugin  */
+    private $theme;
+
+    public function __construct()
+    {
+        $this->theme = \Piwik\Plugin\Manager::getInstance()->getThemeEnabled();
+        $this->themeName = $this->theme->getPluginName();
+    }
+
+    public function getStylesheet()
+    {
+        if ($this->themeName == \Piwik\Plugin\Manager::DEFAULT_THEME) {
+            return false;
+        }
+
+        $info = $this->theme->getInformation();
+        if (!isset($info['stylesheet'])) {
+            return false;
+        }
+        $themeStylesheet = 'plugins/' . $this->theme->getPluginName() . '/' . $info['stylesheet'];
+        return $themeStylesheet;
+    }
+
+    public function rewriteAssetsPathToTheme($output)
+    {
+        if ($this->themeName == \Piwik\Plugin\Manager::DEFAULT_THEME) {
+            return;
+        }
+
+        $pattern = array(
+            // Rewriting scripts includes to overrides
+            '~<script type=[\'"]text/javascript[\'"] (src)=[\'"]([^\'"]+)[\'"]>~',
+            '~<script (src)=[\'"]([^\'"]+)[\'"] type=[\'"]text/javascript[\'"]>~',
+            '~<link (rel)=[\'"]stylesheet[\'"] type=[\'"]text/css[\'"] href=[\'"]([^\'"]+)[\'"] ?/?>~',
+
+            // Images as well
+            '~(src|href)=[\'"]([^\'"]+)[\'"]~',
+
+            // rewrite images in CSS files, i.e. url(plugins/Morpheus/overrides/themes/default/images/help.png);
+            '~(url\()([^\)]?[themes|plugins]+[^\)]+[.jpg|png|gif]?)[\)]~',
+
+            // rewrites images in JS files
+            '~(=)[\s]?[\'"]([^\'"]+[.jpg|.png|.gif]?)[\'"]~',
+        );
+        return preg_replace_callback($pattern, array($this,'rewriteAssetPathIfOverridesFound'), $output);
+    }
+
+    private function rewriteAssetPathIfOverridesFound($src)
+    {
+        $source = $src[0];
+        $pathAsset = $src[2];
+
+        // Basic health check, we dont replace if not starting with plugins/
+        if( strpos($pathAsset, 'plugins') !== 0) {
+            return $source;
+        }
+
+        // or if it's already rewritten
+        if(strpos($pathAsset, $this->themeName) !== false) {
+            return $source;
+        }
+
+        $defaultThemePath = "plugins/" . \Piwik\Plugin\Manager::DEFAULT_THEME;
+        $newThemePath = "plugins/" . $this->themeName;
+        $overridingAsset = str_replace($defaultThemePath, $newThemePath, $pathAsset);
+
+        if(file_exists($overridingAsset)) {
+            return str_replace($pathAsset, $overridingAsset, $source);
+        }
+        return $source;
+    }
+
+}
\ No newline at end of file
-- 
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