* PHPTAL library

1 files changed, 117 insertions, 0 deletions

diff --git a/lib/phptal/PHPTAL/Php/Attribute/TAL/Replace.php b/lib/phptal/PHPTAL/Php/Attribute/TAL/Replace.php
new file mode 100644
index 0000000..b72cafa
--- /dev/null
+++ b/lib/phptal/PHPTAL/Php/Attribute/TAL/Replace.php
@@ -0,0 +1,117 @@
+<?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 ::= (['text'] | 'structure') expression
+ *
+ *  Default behaviour : text
+ *
+ *      <span tal:replace="template/title">Title</span>
+ *      <span tal:replace="text template/title">Title</span>
+ *      <span tal:replace="structure table" />
+ *      <span tal:replace="nothing">This element is a comment.</span>
+ *
+ *
+ *
+ * @package PHPTAL
+ * @subpackage Php.attribute.tal
+ * @author Laurent Bedubourg <lbedubourg@motion-twin.com>
+ */
+class PHPTAL_Php_Attribute_TAL_Replace
+extends PHPTAL_Php_Attribute
+implements PHPTAL_Php_TalesChainReader
+{
+    public function before(PHPTAL_Php_CodeWriter $codewriter)
+    {
+        // tal:replace="" => do nothing and ignore node
+        if (trim($this->expression) == "") {
+            return;
+        }
+
+        $expression = $this->extractEchoType($this->expression);
+        $code = $codewriter->evaluateExpression($expression);
+
+        // chained expression
+        if (is_array($code)) {
+            return $this->replaceByChainedExpression($codewriter, $code);
+        }
+
+        // nothing do nothing
+        if ($code == PHPTAL_Php_TalesInternal::NOTHING_KEYWORD) {
+            return;
+        }
+
+        // default generate default tag content
+        if ($code == PHPTAL_Php_TalesInternal::DEFAULT_KEYWORD) {
+            return $this->generateDefault($codewriter);
+        }
+
+        // replace tag with result of expression
+        $this->doEchoAttribute($codewriter, $code);
+    }
+
+    public function after(PHPTAL_Php_CodeWriter $codewriter)
+    {
+    }
+
+    /**
+     * support expressions like "foo | bar"
+     */
+    private function replaceByChainedExpression(PHPTAL_Php_CodeWriter $codewriter, $expArray)
+    {
+        $executor = new PHPTAL_Php_TalesChainExecutor(
+            $codewriter, $expArray, $this
+        );
+    }
+
+    public function talesChainNothingKeyword(PHPTAL_Php_TalesChainExecutor $executor)
+    {
+        $executor->continueChain();
+    }
+
+    public function talesChainDefaultKeyword(PHPTAL_Php_TalesChainExecutor $executor)
+    {
+        $executor->doElse();
+        $this->generateDefault($executor->getCodeWriter());
+        $executor->breakChain();
+    }
+
+    public function talesChainPart(PHPTAL_Php_TalesChainExecutor $executor, $exp, $islast)
+    {
+        if (!$islast) {
+            $var = $executor->getCodeWriter()->createTempVariable();
+            $executor->doIf('!phptal_isempty('.$var.' = '.$exp.')');
+            $this->doEchoAttribute($executor->getCodeWriter(), $var);
+            $executor->getCodeWriter()->recycleTempVariable($var);
+        } else {
+            $executor->doElse();
+            $this->doEchoAttribute($executor->getCodeWriter(), $exp);
+        }
+    }
+
+    /**
+     * don't replace - re-generate default content
+     */
+    private function generateDefault(PHPTAL_Php_CodeWriter $codewriter)
+    {
+        $this->phpelement->generateSurroundHead($codewriter);
+        $this->phpelement->generateHead($codewriter);
+        $this->phpelement->generateContent($codewriter);
+        $this->phpelement->generateFoot($codewriter);
+        $this->phpelement->generateSurroundFoot($codewriter);
+    }
+}
+