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<?php
class Less_Tree_Mixin_Definition extends Less_Tree_Ruleset{
public $name;
public $selectors;
public $params;
public $arity = 0;
public $rules;
public $lookups = array();
public $required = 0;
public $frames = array();
public $condition;
public $variadic;
public $type = 'MixinDefinition';
// less.js : /lib/less/tree/mixin.js : tree.mixin.Definition
public function __construct($name, $params, $rules, $condition, $variadic = false, $frames = array() ){
$this->name = $name;
$this->selectors = array(new Less_Tree_Selector(array( new Less_Tree_Element(null, $name))));
$this->params = $params;
$this->condition = $condition;
$this->variadic = $variadic;
$this->rules = $rules;
if( $params ){
$this->arity = count($params);
foreach( $params as $p ){
if (! isset($p['name']) || ($p['name'] && !isset($p['value']))) {
$this->required++;
}
}
}
$this->frames = $frames;
$this->SetRulesetIndex();
}
//function accept( $visitor ){
// $this->params = $visitor->visit($this->params);
// $this->rules = $visitor->visit($this->rules);
// $this->condition = $visitor->visit($this->condition);
//}
public function toCSS(){
return '';
}
// less.js : /lib/less/tree/mixin.js : tree.mixin.Definition.evalParams
public function compileParams($env, $mixinFrames, $args = array() , &$evaldArguments = array() ){
$frame = new Less_Tree_Ruleset(null, array());
$params = $this->params;
$mixinEnv = null;
$argsLength = 0;
if( $args ){
$argsLength = count($args);
for($i = 0; $i < $argsLength; $i++ ){
$arg = $args[$i];
if( $arg && $arg['name'] ){
$isNamedFound = false;
foreach($params as $j => $param){
if( !isset($evaldArguments[$j]) && $arg['name'] === $params[$j]['name']) {
$evaldArguments[$j] = $arg['value']->compile($env);
array_unshift($frame->rules, new Less_Tree_Rule( $arg['name'], $arg['value']->compile($env) ) );
$isNamedFound = true;
break;
}
}
if ($isNamedFound) {
array_splice($args, $i, 1);
$i--;
$argsLength--;
continue;
} else {
throw new Less_Exception_Compiler("Named argument for " . $this->name .' '.$args[$i]['name'] . ' not found');
}
}
}
}
$argIndex = 0;
foreach($params as $i => $param){
if ( isset($evaldArguments[$i]) ){ continue; }
$arg = null;
if( isset($args[$argIndex]) ){
$arg = $args[$argIndex];
}
if (isset($param['name']) && $param['name']) {
if( isset($param['variadic']) ){
$varargs = array();
for ($j = $argIndex; $j < $argsLength; $j++) {
$varargs[] = $args[$j]['value']->compile($env);
}
$expression = new Less_Tree_Expression($varargs);
array_unshift($frame->rules, new Less_Tree_Rule($param['name'], $expression->compile($env)));
}else{
$val = ($arg && $arg['value']) ? $arg['value'] : false;
if ($val) {
$val = $val->compile($env);
} else if ( isset($param['value']) ) {
if( !$mixinEnv ){
$mixinEnv = new Less_Environment();
$mixinEnv->frames = array_merge( array($frame), $mixinFrames);
}
$val = $param['value']->compile($mixinEnv);
$frame->resetCache();
} else {
throw new Less_Exception_Compiler("Wrong number of arguments for " . $this->name . " (" . $argsLength . ' for ' . $this->arity . ")");
}
array_unshift($frame->rules, new Less_Tree_Rule($param['name'], $val));
$evaldArguments[$i] = $val;
}
}
if ( isset($param['variadic']) && $args) {
for ($j = $argIndex; $j < $argsLength; $j++) {
$evaldArguments[$j] = $args[$j]['value']->compile($env);
}
}
$argIndex++;
}
ksort($evaldArguments);
$evaldArguments = array_values($evaldArguments);
return $frame;
}
public function compile($env) {
if( $this->frames ){
return new Less_Tree_Mixin_Definition($this->name, $this->params, $this->rules, $this->condition, $this->variadic, $this->frames );
}
return new Less_Tree_Mixin_Definition($this->name, $this->params, $this->rules, $this->condition, $this->variadic, $env->frames );
}
public function evalCall($env, $args = NULL, $important = NULL) {
Less_Environment::$mixin_stack++;
$_arguments = array();
if( $this->frames ){
$mixinFrames = array_merge($this->frames, $env->frames);
}else{
$mixinFrames = $env->frames;
}
$frame = $this->compileParams($env, $mixinFrames, $args, $_arguments);
$ex = new Less_Tree_Expression($_arguments);
array_unshift($frame->rules, new Less_Tree_Rule('@arguments', $ex->compile($env)));
$ruleset = new Less_Tree_Ruleset(null, $this->rules);
$ruleset->originalRuleset = $this->ruleset_id;
$ruleSetEnv = new Less_Environment();
$ruleSetEnv->frames = array_merge( array($this, $frame), $mixinFrames );
$ruleset = $ruleset->compile( $ruleSetEnv );
if( $important ){
$ruleset = $ruleset->makeImportant();
}
Less_Environment::$mixin_stack--;
return $ruleset;
}
public function matchCondition($args, $env) {
if( !$this->condition ){
return true;
}
// set array to prevent error on array_merge
if(!is_array($this->frames)) {
$this->frames = array();
}
$frame = $this->compileParams($env, array_merge($this->frames,$env->frames), $args );
$compile_env = new Less_Environment();
$compile_env->frames = array_merge(
array($frame) // the parameter variables
, $this->frames // the parent namespace/mixin frames
, $env->frames // the current environment frames
);
$compile_env->functions = $env->functions;
return (bool)$this->condition->compile($compile_env);
}
public function matchArgs($args, $env = NULL){
$argsLength = count($args);
if( !$this->variadic ){
if( $argsLength < $this->required ){
return false;
}
if( $argsLength > count($this->params) ){
return false;
}
}else{
if( $argsLength < ($this->required - 1)){
return false;
}
}
$len = min($argsLength, $this->arity);
for( $i = 0; $i < $len; $i++ ){
if( !isset($this->params[$i]['name']) && !isset($this->params[$i]['variadic']) ){
if( $args[$i]['value']->compile($env)->toCSS() != $this->params[$i]['value']->compile($env)->toCSS() ){
return false;
}
}
}
return true;
}
}
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