/**
* Compiles the XML attribute which may contain some dynamic data.
* The method automatically recognizes the registered expression
* engine and launches it.
*
* @param Opt_Xml_Attribute $attr The attribute to parse.
*/
public function compileAttribute(Opt_Xml_Attribute $attr)
{
$value = $attr->getValue();
if (preg_match('/^([a-zA-Z0-9\\_]+)\\:([^\\:].*)$/', $value, $found)) {
switch ($found[1]) {
case 'parse':
$result = $this->parseExpression($found[2], $found[1], self::ESCAPE_ON, $this->_tpl->attributeModifier);
$attr->addAfter(Opt_Xml_Buffer::ATTRIBUTE_VALUE, 'echo ' . $result['expression'] . '; ');
break;
case 'str':
$result = $this->parseExpression($found[2], $found[1], self::ESCAPE_ON, $this->_tpl->attributeModifier);
$attr->addAfter(Opt_Xml_Buffer::ATTRIBUTE_VALUE, 'echo ' . $result['escaped'] . '; ');
break;
case null:
$attr->setValue($found[2]);
break;
}
}
}
/**
* Processes the opt:attribute instruction tag.
* @internal
* @param Opt_Xml_Node $node XML node.
*/
public function processNode(Opt_Xml_Node $node)
{
$params = array('name' => array(0 => self::REQUIRED, self::EXPRESSION, null, 'parse'), 'value' => array(0 => self::OPTIONAL, self::EXPRESSION, null, 'parse'), 'ns' => array(0 => self::OPTIONAL, self::EXPRESSION, null, 'parse'));
$this->_extractAttributes($node, $params);
self::$_cnt++;
$parent = $node->getParent();
$returnStyle = $node->get('attributeValueStyle');
$returnStyle = is_null($returnStyle) ? self::ATTR_DISPLAY : $returnStyle;
if ($returnStyle == self::ATTR_DISPLAY) {
if (!$node->getParent() instanceof Opt_Xml_Element) {
throw new Opt_InstructionInvalidParent_Exception('opt:attribute', 'printable tag');
}
$parentName = $node->getParent()->getXmlName();
if (($this->_compiler->isInstruction($parentName) || $this->_compiler->isComponent($parentName) || $this->_compiler->isBlock($parentName)) && $node->getParent()->get('call:attribute-friendly') === null) {
throw new Opt_InstructionInvalidParent_Exception('opt:attribute', 'printable tag');
}
// This is a bit tricky optimization. If the name is constant, there is no need to process it as a variable name.
// If the name is constant, the result must contain only a string
if ($params['ns'] !== null) {
$trNamespace = trim($params['ns'], '\' ');
if (!(substr_count($params['ns'], '\'') == 2 && substr_count($trNamespace, '\'') == 0 && $this->_compiler->isIdentifier($trNamespace))) {
unset($trNamespace);
}
}
// Using the same tricky optimization for names
$trName = trim($params['name'], '\' ');
if (!(substr_count($params['name'], '\'') == 2 && substr_count($trName, '\'') == 0 && $this->_compiler->isIdentifier($trName))) {
unset($trName);
}
if (isset($trName) && $params['ns'] === null || isset($trName) && isset($trNamespace)) {
$attribute = new Opt_Xml_Attribute($trName, $params['value']);
if (isset($trNamespace)) {
$attribute->setNamespace($trNamespace);
}
} else {
$attribute = new Opt_Xml_Attribute('__xattr_' . self::$_cnt, $params['value']);
if (isset($trNamespace)) {
$attribute->addAfter(Opt_Xml_Buffer::ATTRIBUTE_NAME, 'echo \'' . $trNamespace . ':\'.' . $params['name'] . '; ');
} elseif ($params['ns'] !== null) {
$attribute->addAfter(Opt_Xml_Buffer::ATTRIBUTE_NAME, ' $_ns = ' . $params['ns'] . '; echo (!empty($_ns) ? $_ns.\':\' : \'\').' . $params['name'] . '; ');
} else {
$attribute->addAfter(Opt_Xml_Buffer::ATTRIBUTE_NAME, 'echo ' . $params['name'] . '; ');
}
}
// Construct the value for the attribute.
if ($node->hasChildren()) {
// The more complex statement with opt:value nodes...
list($pairs, $else) = $this->_getValuePairs($node, $params);
// Now, create the IF...ELSEIF statement
// We perform here a small optimization. If the "ELSE" statement is set
// the value will always appear, so we can put this code directly in ATTRIBUTE_VALUE
// and do not bother with temporary variables.
if ($else !== null) {
$destination = 'echo';
$code = '';
} else {
$destination = '$_attr' . self::$_cnt . '_val = ';
$code = '$_attr' . self::$_cnt . '_val = null; ';
}
$start = true;
foreach ($pairs as $pair) {
if ($start) {
$code = ' if(' . $pair[0] . '){ ' . $destination . ' ' . $pair[1] . '; }';
$start = false;
} else {
$code .= 'elseif(' . $pair[0] . '){ ' . $destination . ' ' . $pair[1] . '; }';
}
}
if ($else !== null) {
$code .= 'else{ ' . $destination . ' ' . $else . '; } ';
$attribute->addAfter(Opt_Xml_Buffer::ATTRIBUTE_VALUE, $code);
} else {
$attribute->addAfter(Opt_Xml_Buffer::ATTRIBUTE_BEGIN, $code . ' if($_attr' . self::$_cnt . '_val !== null){ ');
$attribute->addAfter(Opt_Xml_Buffer::ATTRIBUTE_VALUE, ' echo $_attr' . self::$_cnt . '_val; ');
$attribute->addAfter(Opt_Xml_Buffer::ATTRIBUTE_END, ' } ');
}
} else {
// The ordinary behaviour
if ($params['value'] === null) {
throw new Opt_AttributeNotDefined_Exception('value', $node->getXmlName());
}
$attribute->addAfter(Opt_Xml_Buffer::ATTRIBUTE_VALUE, 'echo ' . $params['value'] . '; ');
}
} else {
// In the raw mode, we simply put the raw expressions, because they will be processed
// later by another instruction processor.
$attribute = new Opt_Xml_Attribute('__xattr_' . self::$_cnt++, $params['value']);
$attribute->addAfter(Opt_Xml_Buffer::ATTRIBUTE_NAME, $params['name']);
// Construct the value for the attribute.
if ($node->hasChildren()) {
// The more complex statement with opt:value nodes...
$attribute->set('call:values', $this->_getValuePairs($node, $params));
$attribute->addAfter(Opt_Xml_Buffer::ATTRIBUTE_VALUE, '');
} else {
// The ordinary behaviour
$attribute->addAfter(Opt_Xml_Buffer::ATTRIBUTE_VALUE, $params['value']);
}
if ($params['ns'] !== null) {
$attribute->set('priv:namespace', $params['ns']);
}
}
$node->set('priv:attr', $attribute);
$node->set('postprocess', true);
// Add the newly created attribute to the list of dynamic attributes in the parent tag.
// If the list does not exist, then create it.
if (!is_null($list = $parent->get('call:attribute'))) {
array_push($list, $attribute);
$parent->set('call:attribute', $list);
} else {
$parent->set('call:attribute', array(0 => $attribute));
}
// Check, if such attribute does not exist...
if ($parent->getAttribute($attribute->getXmlName()) !== null) {
throw new Opt_XmlDuplicatedAttribute_Exception($attribute->getXmlName(), $parent->getXmlName());
}
$parent->addAttribute($attribute);
$parent->removeChild($node);
}