/** * Tries to extract a single attribute, using the specified value type. * * @final * @internal * @param Opt_Xml_Element $item The scanned XML element. * @param Opt_Xml_Attribute $attr The parsed attribute * @param Int $type The requested value type. * @return Mixed The extracted attribute value */ private final function _extractAttribute(Opt_Xml_Element $item, Opt_Xml_Attribute $attr, $type, $exprType = null) { $value = (string) $attr; switch ($type) { // An identifier, but with empty values allowed. case self::ID_EMP: if ($value == '') { return $value; } // An identifier // An identifier case self::ID: if (!preg_match('/^[a-zA-Z0-9\\_\\.]+$/', $value)) { throw new Opt_InvalidAttributeType_Exception($attr->getXmlName(), $item->getXmlName(), 'identifier'); } return $value; // A number // A number case self::NUMBER: if (!preg_match('/^\\-?([0-9]+\\.?[0-9]*)|(0[xX][0-9a-fA-F]+)$/', $value)) { throw new Opt_InvalidAttributeType_Exception($attr->getXmlName(), $item->getXmlName(), 'number'); } return $value; // Boolean value: "yes" or "no" // Boolean value: "yes" or "no" case self::BOOL: if ($value != 'yes' && $value != 'no') { throw new Opt_InvalidAttributeType_Exception($attr->getXmlName(), $item->getXmlName(), '"yes" or "no"'); } return $value == 'yes'; // A string packed into PHP expression. Can be switched to EXPRESSION. // A string packed into PHP expression. Can be switched to EXPRESSION. case self::STRING: return $value; break; // An OPT expression. // An OPT expression. case self::EXPRESSION: case self::ASSIGN_EXPR: if (strlen(trim($value)) == 0) { throw new Opt_AttributeEmpty_Exception($attr->getXmlName(), $item->getXmlName()); } if (preg_match('/^([a-zA-Z0-9\\_]{2,})\\:([^\\:].*)$/', $value, $found)) { $result = $this->_compiler->parseExpression($found[2], $found[1]); } else { $result = $this->_compiler->parseExpression($value, $exprType); } if ($result['type'] == Opt_Expression_Interface::ASSIGNMENT && $type != self::ASSIGN_EXPR) { Opt_ExpressionOptionDisabled_Exception('Assignments', 'compiler requirements'); } return $result['bare']; } }
/** * This function is executed by the compiler during the second compilation stage, * processing. */ public function preProcess(Opt_Compiler_Class $compiler) { $this->set('hidden', false); // Empty expressions will be caught by the try... catch. try { $result = $compiler->parseExpression((string) $this); switch ($result['type']) { case Opt_Expression_Interface::ASSIGNMENT: $this->addAfter(Opt_Xml_Buffer::TAG_BEFORE, $result['bare'] . '; '); break; case Opt_Expression_Interface::SCALAR: if ($result['escaping'] == false) { $this->addAfter(Opt_Xml_Buffer::TAG_BEFORE, $result['bare']); $this->set('nophp', true); break; } // TODO: Add escaping for scalar values. // TODO: Add escaping for scalar values. default: $this->addAfter(Opt_Xml_Buffer::TAG_BEFORE, 'echo ' . $result['escaped'] . '; '); } } catch (Opt_EmptyExpression_Exception $e) { } }