[Configuration] Adding font (fixes #9)

DependencyInjection/Configuration.php

@@ -22,6 +22,7 @@ class Configuration implements ConfigurationInterface
                 ->scalarNode('length')->defaultValue(5)->end()
                 ->scalarNode('width')->defaultValue(120)->end()
                 ->scalarNode('height')->defaultValue(40)->end()
+                ->scalarNode('font')->defaultValue(__DIR__.'/../Generator/Font/captcha.ttf')->end()
                 ->scalarNode('keep_value')->defaultValue(true)->end()
                 ->scalarNode('charset')->defaultValue('abcdefhjkmnprstuvwxyz23456789')->end()
                 ->scalarNode('as_file')->defaultValue(false)->end()

Generator/CaptchaGenerator.php

@@ -27,6 +27,12 @@ class CaptchaGenerator {
      */
     public $gcFreq;
 
+    /**
+     * Captcha Font
+     * @var string
+     */
+    public $font;
+
     /**
      * Maximum age of images in minutes
      * @var int
@@ -39,15 +45,19 @@ class CaptchaGenerator {
      */
     public $value;
 
-    public function __construct($value, $imageFolder, $webPath, $gcFreq, $expiration)
+    public function __construct($value, $imageFolder, $webPath, $gcFreq, $expiration, $font)
     {
         $this->value = $value;
         $this->imageFolder = $imageFolder;
         $this->webPath = $webPath;
         $this->gcFreq = intval($gcFreq);
         $this->expiration = intval($expiration);
+        $this->font = $font;
     }
 
+    /**
+     * Get the captcha embeded code
+     */
     public function getCode($width = 120, $height = 40)
     {
         return 'data:image/jpeg;base64,'.base64_encode($this->generate($width, $height));
@@ -112,7 +122,7 @@ class CaptchaGenerator {
 
         // Write CAPTCHA text
         $size = $width/strlen($this->value);
-        $font = __DIR__.'/Font/captcha.ttf';
+        $font = $this->font;
         $box = imagettfbbox($size, 0, $font, $this->value);
         $txt_width = $box[2] - $box[0];
         $txt_height = $box[1] - $box[7];

README.md

@@ -101,6 +101,7 @@ You can define the following type option :
 * **height**: the height of the captcha image (default=40)
 * **length**: the length of the captcha (number of chars, default 5)
 * **charset**: the charset used for code generation (default=abcdefhjkmnprstuvwxyz23456789)
+* **font**: the font to use (default=Generator/Font/captcha.ttf)
 * **keep_value**: the value will be the same until the form is posted, even if the page is refreshed (default=true)
 * **as_file**: if set to true an image file will be created instead of embedding to please IE6/7 (default=false)
 * **image_folder**: name of folder for captcha images relative to public web folder in case **as_file** ist set to true (default="captcha")

Type/CaptchaType.php

@@ -74,13 +74,19 @@ class CaptchaType extends AbstractType
      * Frequence of garbage collection in fractions of 1
      * @var int
      */
-    public $gcFreq;
+    protected $gcFreq;
+
+    /**
+     * Captcha font
+     * @var string
+     */
+    protected $font;
 
     /**
      * Maximum age of images in minutes
      * @var int
      */
-    public $expiration;
+    protected $expiration;
 
     /**
      * The session
@@ -109,6 +115,7 @@ class CaptchaType extends AbstractType
         $this->webPath = $config['web_path'];
         $this->gcFreq = $config['gc_freq'];
         $this->expiration = $config['expiration'];
+        $this->font = $config['font'];
     }
 
     public function buildForm(FormBuilder $builder, array $options)
@@ -121,7 +128,7 @@ class CaptchaType extends AbstractType
 
     public function buildView(FormView $view, FormInterface $form)
     {
-        $generator = new CaptchaGenerator($this->generateCaptchaValue(), $this->imageFolder, $this->webPath, $this->gcFreq, $this->expiration);
+        $generator = new CaptchaGenerator($this->generateCaptchaValue(), $this->imageFolder, $this->webPath, $this->gcFreq, $this->expiration, $this->font);
 
         if ($this->asFile) {
             $view->set('captcha_code', $generator->getFile($this->width, $this->height));