[Form][Validator] Fixed generation of HTML5 pattern attribute based on Assert\Regex to remove delimiters.

[Validator] Added delimiter escaping to Validator\Constraints\Regex::getNonDelimitedPattern

[Form][Validator] Added htmlPattern option for Regex Validation.

[Validator] Fixed Validator\Constraints\Regex::getNonDelimitedPattern variable declarations

[Validator] Fixed tests for Regex htmlPattern option (instead of html_pattern)

[Validation] tweaked generation of pattern to include .* when not anchors are present. Also removed the exception and made getNonDelimitedPattern private

src/Symfony/Component/Form/Extension/Validator/ValidatorTypeGuesser.php

@@ -261,7 +261,12 @@ class ValidatorTypeGuesser implements FormTypeGuesserInterface
                 return new ValueGuess(sprintf('.{%s,%s}', (string) $constraint->min, (string) $constraint->max), Guess::LOW_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\Regex':
-                return new ValueGuess($constraint->pattern, Guess::HIGH_CONFIDENCE );
+                $htmlPattern = $constraint->getHtmlPattern();
+
+                if (null !== $htmlPattern) {
+                    return new ValueGuess($htmlPattern, Guess::HIGH_CONFIDENCE);
+                }
+                break;
 
             case 'Symfony\Component\Validator\Constraints\Min':
                 return new ValueGuess(sprintf('.{%s,}', strlen((string) $constraint->limit)), Guess::LOW_CONFIDENCE);

src/Symfony/Component/Form/Tests/FormFactoryTest.php

@@ -528,7 +528,7 @@ class FormFactoryTest extends \PHPUnit_Framework_TestCase
                 ->method('guessPattern')
                 ->with('Application\Author', 'firstName')
                 ->will($this->returnValue(new ValueGuess(
-                    '/[a-z]/',
+                    '[a-z]',
                     Guess::MEDIUM_CONFIDENCE
                 )));
 
@@ -536,7 +536,7 @@ class FormFactoryTest extends \PHPUnit_Framework_TestCase
                 ->method('guessPattern')
                 ->with('Application\Author', 'firstName')
                 ->will($this->returnValue(new ValueGuess(
-                    '/[a-zA-Z]/',
+                    '[a-zA-Z]',
                     Guess::HIGH_CONFIDENCE
                 )));
 
@@ -544,7 +544,7 @@ class FormFactoryTest extends \PHPUnit_Framework_TestCase
 
         $factory->expects($this->once())
             ->method('createNamedBuilder')
-            ->with('firstName', 'text', null, array('pattern' => '/[a-zA-Z]/'))
+            ->with('firstName', 'text', null, array('pattern' => '[a-zA-Z]'))
             ->will($this->returnValue('builderInstance'));
 
         $builder = $factory->createBuilderForProperty(

src/Symfony/Component/Validator/Constraints/Regex.php

@@ -12,6 +12,7 @@
 namespace Symfony\Component\Validator\Constraints;
 
 use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Exception\ConstraintDefinitionException;
 
 /**
  * @Annotation
@@ -22,6 +23,7 @@ class Regex extends Constraint
 {
     public $message = 'This value is not valid.';
     public $pattern;
+    public $htmlPattern = null;
     public $match = true;
 
     /**
@@ -39,4 +41,46 @@ class Regex extends Constraint
     {
         return array('pattern');
     }
+
+    /**
+     * Returns htmlPattern if exists or pattern is convertible.
+     *
+     * @return string|null
+     */
+    public function getHtmlPattern()
+    {
+        // If htmlPattern is specified, use it
+        if (null !== $this->htmlPattern) {
+            return empty($this->htmlPattern)
+                ? null
+                : $this->htmlPattern;
+        }
+
+        return $this->getNonDelimitedPattern();
+    }
+
+    /**
+     * Convert the htmlPattern to a suitable format for HTML5 pattern.
+     * Example: /^[a-z]+$/ would be converted to [a-z]+
+     * However, if options are specified, it cannot be converted
+     *
+     * @link http://dev.w3.org/html5/spec/single-page.html#the-pattern-attribute
+     *
+     * @return string|null
+     */
+    private function getNonDelimitedPattern()
+    {
+        if (preg_match('/^(.)(\^?)(.*?)(\$?)\1$/', $this->pattern, $matches)) {
+            $delimiter = $matches[1];
+            $start     = empty($matches[2]) ? '.*' : '';
+            $pattern   = $matches[3];
+            $end       = empty($matches[4]) ? '.*' : '';
+
+            // Unescape the delimiter in pattern
+            $pattern = str_replace('\\' . $delimiter, $delimiter, $pattern);
+            return $start . $pattern . $end;
+        }
+
+        return null;
+    }
 }

src/Symfony/Component/Validator/Tests/Constraints/RegexValidatorTest.php

@@ -113,4 +113,55 @@ class RegexValidatorTest extends \PHPUnit_Framework_TestCase
 
         $this->assertEquals('pattern', $constraint->getDefaultOption());
     }
+
+    public function testHtmlPatternEscaping()
+    {
+        $constraint = new Regex(array(
+            'pattern' => '/^[0-9]+\/$/',
+        ));
+
+        $this->assertEquals('[0-9]+/', $constraint->getHtmlPattern());
+
+        $constraint = new Regex(array(
+            'pattern' => '#^[0-9]+\#$#',
+        ));
+
+        $this->assertEquals('[0-9]+#', $constraint->getHtmlPattern());
+    }
+
+    public function testHtmlPattern()
+    {
+        // Specified htmlPattern
+        $constraint = new Regex(array(
+            'pattern' => '/^[a-z]+$/i',
+            'htmlPattern' => '[a-zA-Z]+',
+        ));
+        $this->assertEquals('[a-zA-Z]+', $constraint->getHtmlPattern());
+
+        // Disabled htmlPattern
+        $constraint = new Regex(array(
+            'pattern' => '/^[a-z]+$/i',
+            'htmlPattern' => false,
+        ));
+        $this->assertNull($constraint->getHtmlPattern());
+
+        // Cannot be converted
+        $constraint = new Regex(array(
+            'pattern' => '/^[a-z]+$/i',
+        ));
+        $this->assertNull($constraint->getHtmlPattern());
+
+        // Automaticaly converted
+        $constraint = new Regex(array(
+            'pattern' => '/^[a-z]+$/',
+        ));
+        $this->assertEquals('[a-z]+', $constraint->getHtmlPattern());
+
+        // Automaticaly converted, adds .*
+        $constraint = new Regex(array(
+            'pattern' => '/[a-z]+/',
+        ));
+        $this->assertEquals('.*[a-z]+.*', $constraint->getHtmlPattern());
+    }
+
 }