Add support to set temporary directory

Author: dmitrivereshchagin

README.md

@@ -21,15 +21,19 @@ following in configuration `components` section:
     'class' => '\Snappy\PdfComponent',
     'binary' => '/usr/local/bin/wkhtmltopdf',
     'options' => array('orientation' => 'landscape'),
+    'tempdir' => __DIR__.'/../runtime/pdf',
 ),
 'image' => array(
     'class' => '\Snappy\ImageComponent',
     'binary' => '/usr/local/bin/wkhtmltoimage',
+    'tempdir' => __DIR__.'/../runtime/image',
 ),
 ```
 
 Specifying paths to binaries is mandatory.  Optionally you can configure
 default command line arguments that can be overridden or adjusted later.
+It is also possible to set temporary directory for both components using
+`snappy_tempdir` application parameter.
 
 ## Usage
 

src/AbstractComponent.php

@@ -20,6 +20,10 @@ abstract class AbstractComponent extends \CApplicationComponent
      * @var array Command line options
      */
     public $options = array();
+    /**
+     * @var string Path to directory used for temporary files
+     */
+    public $tempdir;
 
     /**
      * Creates and returns generator instance.
@@ -33,13 +37,24 @@ abstract protected function getGenerator();
      */
     public function __call($name, $parameters)
     {
-        if (method_exists('\Knp\Snappy\GeneratorInterface', $name)) {
-            return call_user_func_array(
-                array($this->getGenerator(), $name),
-                $parameters
-            );
+        if (!method_exists('\Knp\Snappy\GeneratorInterface', $name)) {
+            return parent::__call($name, $parameters);
         }
 
-        return parent::__call($name, $parameters);
+        $generator = $this->getGenerator()
+            ->setTemporaryFolder($this->resolveTempdir())
+        ;
+
+        return call_user_func_array(array($generator, $name), $parameters);
+    }
+
+    /**
+     * Resolves path to temporary directory.
+     *
+     * @return string|null
+     */
+    protected function resolveTempdir()
+    {
+        return $this->tempdir ?: \Yii::app()->params['snappy_tempdir'];
     }
 }