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<?php
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/**
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* Smarty Internal Plugin CompileBase
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*
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* @package Smarty
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* @subpackage Compiler
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* @author Uwe Tews
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*/
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/**
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* This class does extend all internal compile plugins
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*
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* @package Smarty
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* @subpackage Compiler
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*/
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abstract class Smarty_Internal_CompileBase {
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/**
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* Array of names of required attribute required by tag
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*
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* @var array
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*/
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public $required_attributes = array();
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/**
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* Array of names of optional attribute required by tag
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* use array('_any') if there is no restriction of attributes names
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*
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* @var array
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*/
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public $optional_attributes = array();
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/**
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* Shorttag attribute order defined by its names
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*
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* @var array
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*/
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public $shorttag_order = array();
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/**
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* Array of names of valid option flags
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*
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* @var array
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*/
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public $option_flags = array('nocache');
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/**
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* This function checks if the attributes passed are valid
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*
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* The attributes passed for the tag to compile are checked against the list of required and
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* optional attributes. Required attributes must be present. Optional attributes are check against
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* the corresponding list. The keyword '_any' specifies that any attribute will be accepted
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* as valid
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*
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* @param object $compiler compiler object
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* @param array $attributes attributes applied to the tag
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* @return array of mapped attributes for further processing
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*/
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public function getAttributes($compiler, $attributes)
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{
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$_indexed_attr = array();
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// loop over attributes
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foreach ($attributes as $key => $mixed) {
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// shorthand ?
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if (!is_array($mixed)) {
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// option flag ?
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if (in_array(trim($mixed, '\'"'), $this->option_flags)) {
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$_indexed_attr[trim($mixed, '\'"')] = true;
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// shorthand attribute ?
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} else if (isset($this->shorttag_order[$key])) {
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$_indexed_attr[$this->shorttag_order[$key]] = $mixed;
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} else {
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// too many shorthands
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$compiler->trigger_template_error('too many shorthand attributes', $compiler->lex->taglineno);
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}
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// named attribute
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} else {
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$kv = each($mixed);
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// option flag?
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if (in_array($kv['key'], $this->option_flags)) {
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if (is_bool($kv['value'])) {
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$_indexed_attr[$kv['key']] = $kv['value'];
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} else if (is_string($kv['value']) && in_array(trim($kv['value'], '\'"'), array('true', 'false'))) {
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if (trim($kv['value']) == 'true') {
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$_indexed_attr[$kv['key']] = true;
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} else {
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$_indexed_attr[$kv['key']] = false;
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}
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} else if (is_numeric($kv['value']) && in_array($kv['value'], array(0, 1))) {
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if ($kv['value'] == 1) {
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$_indexed_attr[$kv['key']] = true;
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} else {
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$_indexed_attr[$kv['key']] = false;
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}
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} else {
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$compiler->trigger_template_error("illegal value of option flag \"{$kv['key']}\"", $compiler->lex->taglineno);
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}
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// must be named attribute
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} else {
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reset($mixed);
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$_indexed_attr[key($mixed)] = $mixed[key($mixed)];
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}
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}
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}
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// check if all required attributes present
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foreach ($this->required_attributes as $attr) {
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if (!array_key_exists($attr, $_indexed_attr)) {
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$compiler->trigger_template_error("missing \"" . $attr . "\" attribute", $compiler->lex->taglineno);
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}
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}
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// check for unallowed attributes
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if ($this->optional_attributes != array('_any')) {
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$tmp_array = array_merge($this->required_attributes, $this->optional_attributes, $this->option_flags);
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foreach ($_indexed_attr as $key => $dummy) {
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if (!in_array($key, $tmp_array) && $key !== 0) {
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$compiler->trigger_template_error("unexpected \"" . $key . "\" attribute", $compiler->lex->taglineno);
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}
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}
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}
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// default 'false' for all option flags not set
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foreach ($this->option_flags as $flag) {
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if (!isset($_indexed_attr[$flag])) {
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$_indexed_attr[$flag] = false;
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}
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}
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return $_indexed_attr;
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}
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/**
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* Push opening tag name on stack
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*
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* Optionally additional data can be saved on stack
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*
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* @param object $compiler compiler object
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* @param string $openTag the opening tag's name
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* @param mixed $data optional data saved
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*/
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public function openTag($compiler, $openTag, $data = null)
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{
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array_push($compiler->_tag_stack, array($openTag, $data));
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}
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/**
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* Pop closing tag
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*
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* Raise an error if this stack-top doesn't match with expected opening tags
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*
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* @param object $compiler compiler object
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* @param array|string $expectedTag the expected opening tag names
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* @return mixed any type the opening tag's name or saved data
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*/
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public function closeTag($compiler, $expectedTag)
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{
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if (count($compiler->_tag_stack) > 0) {
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// get stacked info
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list($_openTag, $_data) = array_pop($compiler->_tag_stack);
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// open tag must match with the expected ones
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if (in_array($_openTag, (array) $expectedTag)) {
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if (is_null($_data)) {
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// return opening tag
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return $_openTag;
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} else {
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// return restored data
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return $_data;
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}
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}
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// wrong nesting of tags
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$compiler->trigger_template_error("unclosed {" . $_openTag . "} tag");
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return;
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}
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// wrong nesting of tags
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$compiler->trigger_template_error("unexpected closing tag", $compiler->lex->taglineno);
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return;
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}
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}
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?> |