[Form] added support for rounding-mode option on NumberFields

src/Symfony/Component/Form/NumberField.php

@@ -27,10 +27,12 @@ class NumberField extends InputField
         // default precision is locale specific (usually around 3)
         $this->addOption('precision');
         $this->addOption('grouping', false);
+        $this->addOption('rounding-mode', NumberToLocalizedStringTransformer::ROUND_HALFUP);
 
         $this->setValueTransformer(new NumberToLocalizedStringTransformer(array(
             'precision' => $this->getOption('precision'),
             'grouping' => $this->getOption('grouping'),
+            'rounding-mode' => $this->getOption('rounding-mode'),
         )));
     }
 

src/Symfony/Component/Form/ValueTransformer/NumberToLocalizedStringTransformer.php

@@ -13,6 +13,14 @@ use \Symfony\Component\Form\ValueTransformer\ValueTransformerException;
  */
 class NumberToLocalizedStringTransformer extends BaseValueTransformer
 {
+    const ROUND_FLOOR    = \NumberFormatter::ROUND_FLOOR;
+    const ROUND_DOWN     = \NumberFormatter::ROUND_DOWN;
+    const ROUND_HALFDOWN = \NumberFormatter::ROUND_HALFDOWN;
+    const ROUND_HALFEVEN = \NumberFormatter::ROUND_HALFEVEN;
+    const ROUND_HALFUP   = \NumberFormatter::ROUND_HALFUP;
+    const ROUND_UP       = \NumberFormatter::ROUND_UP;
+    const ROUND_CEILING  = \NumberFormatter::ROUND_CEILING;
+
     /**
      * {@inheritDoc}
      */
@@ -20,6 +28,7 @@ class NumberToLocalizedStringTransformer extends BaseValueTransformer
     {
         $this->addOption('precision', null);
         $this->addOption('grouping', false);
+        $this->addOption('rounding-mode', self::ROUND_HALFUP);
 
         parent::configure();
     }
@@ -78,6 +87,7 @@ class NumberToLocalizedStringTransformer extends BaseValueTransformer
 
         if ($this->getOption('precision') !== null) {
             $formatter->setAttribute(\NumberFormatter::FRACTION_DIGITS, $this->getOption('precision'));
+            $formatter->setAttribute(\NumberFormatter::ROUNDING_MODE, $this->getOption('rounding-mode'));
         }
 
         $formatter->setAttribute(\NumberFormatter::GROUPING_USED, $this->getOption('grouping'));

tests/Symfony/Tests/Component/Form/ValueTransformer/NumberToLocalizedStringTransformerTest.php

@@ -43,6 +43,23 @@ class NumberToLocalizedStringTransformerTest extends LocalizedTestCase
         $this->assertEquals('678,92', $transformer->transform(678.916));
     }
 
+    public function testTransformWithRoundingMode()
+    {
+        $transformer = new NumberToLocalizedStringTransformer(array(
+            'rounding-mode' => NumberToLocalizedStringTransformer::ROUND_DOWN,
+        ));
+        $transformer->setLocale('de_AT');
+        $this->assertEquals('1234,547', $transformer->transform(1234.547), '->transform() only applies rounding mode if precision set');
+
+        $transformer = new NumberToLocalizedStringTransformer(array(
+            'rounding-mode' => NumberToLocalizedStringTransformer::ROUND_DOWN,
+            'precision' => 2,
+        ));
+        $transformer->setLocale('de_AT');
+        $this->assertEquals('1234,54', $transformer->transform(1234.547), '->transform() rounding-mode works');
+
+    }
+
     public function testReverseTransform()
     {
         $transformer = new NumberToLocalizedStringTransformer();