* PHPTAL library

1 files changed, 93 insertions, 0 deletions

diff --git a/lib/phptal/PHPTAL/Php/Attribute/TAL/Condition.php b/lib/phptal/PHPTAL/Php/Attribute/TAL/Condition.php
new file mode 100644
index 0000000..d86b94b
--- /dev/null
+++ b/lib/phptal/PHPTAL/Php/Attribute/TAL/Condition.php
@@ -0,0 +1,93 @@
+<?php
+/**
+ * PHPTAL templating engine
+ *
+ * PHP Version 5
+ *
+ * @category HTML
+ * @package  PHPTAL
+ * @author   Laurent Bedubourg <lbedubourg@motion-twin.com>
+ * @author   Kornel Lesiński <kornel@aardvarkmedia.co.uk>
+ * @license  http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public License
+ * @version  SVN: $Id$
+ * @link     http://phptal.org/
+ */
+
+/**
+ * TAL Specifications 1.4
+ *
+ *      argument ::= expression
+ *
+ * Example:
+ *
+ *      <p tal:condition="here/copyright"
+ *         tal:content="here/copyright">(c) 2000</p>
+ *
+ *
+ *
+ *
+ * @package PHPTAL
+ * @subpackage Php.attribute.tal
+ * @author Laurent Bedubourg <lbedubourg@motion-twin.com>
+ */
+class PHPTAL_Php_Attribute_TAL_Condition
+extends PHPTAL_Php_Attribute
+implements PHPTAL_Php_TalesChainReader
+{
+    private $expressions = array();
+
+    public function before(PHPTAL_Php_CodeWriter $codewriter)
+    {
+        $code = $codewriter->evaluateExpression($this->expression);
+
+        // If it's a chained expression build a new code path
+        if (is_array($code)) {
+            $this->expressions = array();
+            $executor = new PHPTAL_Php_TalesChainExecutor($codewriter, $code, $this);
+            return;
+        }
+
+        // Force a falsy condition if the nothing keyword is active
+        if ($code == PHPTAL_Php_TalesInternal::NOTHING_KEYWORD) {
+            $code = 'false';
+        }
+
+        $codewriter->doIf('phptal_true(' . $code . ')');
+    }
+
+    public function after(PHPTAL_Php_CodeWriter $codewriter)
+    {
+        $codewriter->doEnd('if');
+    }
+
+
+    public function talesChainPart(PHPTAL_Php_TalesChainExecutor $executor, $exp, $islast)
+    {
+        // check if the expression is empty
+        if ($exp !== 'false') {
+            $this->expressions[] = '!phptal_isempty(' . $exp . ')';
+        }
+
+        if ($islast) {
+            // for the last one in the chain build a ORed condition
+            $executor->getCodeWriter()->doIf( implode(' || ', $this->expressions ) );
+            // The executor will always end an if so we output a dummy if
+            $executor->doIf('false');
+        }
+    }
+
+    public function talesChainNothingKeyword(PHPTAL_Php_TalesChainExecutor $executor)
+    {
+        // end the chain
+        $this->talesChainPart($executor, 'false', true);
+        $executor->breakChain();
+    }
+
+    public function talesChainDefaultKeyword(PHPTAL_Php_TalesChainExecutor $executor)
+    {
+        throw new PHPTAL_ParserException('\'default\' keyword not allowed on conditional expressions',
+                    $this->phpelement->getSourceFile(), $this->phpelement->getSourceLine());
+    }
+
+}
+