Merge pull request #359 from shama/patch-texthelper

Fix TextHelper excerpt method to work as documented

lib/Cake/Test/Case/View/Helper/TextHelperTest.php

@@ -354,7 +354,7 @@ class TextHelperTest extends CakeTestCase {
 	public function testExcerpt() {
 		$text = 'This is a phrase with test text to play with';
 
-		$expected = '...with test text...';
+		$expected = '...ase with test text to ...';
 		$result = $this->Text->excerpt($text, 'test', 9, '...');
 		$this->assertEquals($expected, $result);
 
@@ -370,18 +370,19 @@ class TextHelperTest extends CakeTestCase {
 		$result = $this->Text->excerpt($text, null, 200, '...');
 		$this->assertEquals($expected, $result);
 
-		$expected = '...phrase...';
+		$expected = '...a phrase w...';
 		$result = $this->Text->excerpt($text, 'phrase', 2, '...');
 		$this->assertEquals($expected, $result);
 
-		$phrase = 'This is a phrase with test';
+		$phrase = 'This is a phrase with test text';
 		$expected = $text;
-		$result = $this->Text->excerpt($text, $phrase, strlen($phrase) + 3, '...');
+		$result = $this->Text->excerpt($text, $phrase, 13, '...');
 		$this->assertEquals($expected, $result);
-
-		$phrase = 'This is a phrase with text';
-		$expected = $text;
-		$result = $this->Text->excerpt($text, $phrase, 10, '...');
+		
+		$text = 'aaaaaaaaaaaaaaaaaaaaaaaabbbbbbbbaaaaaaaaaaaaaaaaaaaaaaaa';
+		$phrase = 'bbbbbbbb';
+		$result = $this->Text->excerpt($text, $phrase, 10);
+		$expected = '...aaaaaaaaaabbbbbbbbaaaaaaaaaa...';
 		$this->assertEquals($expected, $result);
 	}
 
@@ -393,7 +394,7 @@ class TextHelperTest extends CakeTestCase {
 	public function testExcerptCaseInsensitivity() {
 		$text = 'This is a phrase with test text to play with';
 
-		$expected = '...with test text...';
+		$expected = '...ase with test text to ...';
 		$result = $this->Text->excerpt($text, 'TEST', 9, '...');
 		$this->assertEquals($expected, $result);
 

lib/Cake/View/Helper/TextHelper.php

@@ -321,34 +321,31 @@ class TextHelper extends AppHelper {
 			return $this->truncate($text, $radius * 2, array('ending' => $ending));
 		}
 
+		$append = $prepend = $ending;
+
 		$phraseLen = mb_strlen($phrase);
-		if ($radius < $phraseLen) {
-			$radius = $phraseLen;
-		}
+		$textLen = mb_strlen($text);
 
 		$pos = mb_strpos(mb_strtolower($text), mb_strtolower($phrase));
-
-		$startPos = 0;
-		if ($pos > $radius) {
-			$startPos = $pos - $radius;
+		if ($pos === false) {
+			return mb_substr($text, 0, $radius) . $ending;
 		}
 
-		$textLen = mb_strlen($text);
+		$startPos = $pos - $radius;
+		if ($startPos <= 0) {
+			$startPos = 0;
+			$prepend = '';
+		}
 
 		$endPos = $pos + $phraseLen + $radius;
 		if ($endPos >= $textLen) {
 			$endPos = $textLen;
+			$append = '';
 		}
 
 		$excerpt = mb_substr($text, $startPos, $endPos - $startPos);
-		if ($startPos != 0) {
-			$excerpt = substr_replace($excerpt, $ending, 0, $phraseLen);
-		}
-
-		if ($endPos != $textLen) {
-			$excerpt = substr_replace($excerpt, $ending, -$phraseLen);
-		}
-
+		$excerpt = $prepend . $excerpt . $append;
+		
 		return $excerpt;
 	}