<?php
class Less_Tree_Mixin_Call extends Less_Tree{
public $selector;
public $arguments;
public $index;
public $currentFileInfo;
public $important;
public $type = 'MixinCall';
/**
* less.js: tree.mixin.Call
*
*/
public function __construct($elements, $args, $index, $currentFileInfo, $important = false){
$this->selector = new Less_Tree_Selector($elements);
$this->arguments = $args;
$this->index = $index;
$this->currentFileInfo = $currentFileInfo;
$this->important = $important;
}
//function accept($visitor){
// $this->selector = $visitor->visit($this->selector);
// $this->arguments = $visitor->visit($this->arguments);
//}
public function compile($env){
$rules = array();
$match = false;
$isOneFound = false;
$candidates = array();
$defaultUsed = false;
$conditionResult = array();
$args = array();
foreach($this->arguments as $a){
$args[] = array('name'=> $a['name'], 'value' => $a['value']->compile($env) );
}
foreach($env->frames as $frame){
$mixins = $frame->find($this->selector);
if( !$mixins ){
continue;
}
$isOneFound = true;
$defNone = 0;
$defTrue = 1;
$defFalse = 2;
// To make `default()` function independent of definition order we have two "subpasses" here.
// At first we evaluate each guard *twice* (with `default() == true` and `default() == false`),
// and build candidate list with corresponding flags. Then, when we know all possible matches,
// we make a final decision.
$mixins_len = count($mixins);
for( $m = 0; $m < $mixins_len; $m++ ){
$mixin = $mixins[$m];
if( $this->IsRecursive( $env, $mixin ) ){
continue;
}
if( $mixin->matchArgs($args, $env) ){
$candidate = array('mixin' => $mixin, 'group' => $defNone);
if( $mixin instanceof Less_Tree_Ruleset ){
for( $f = 0; $f < 2; $f++ ){
Less_Tree_DefaultFunc::value($f);
$conditionResult[$f] = $mixin->matchCondition( $args, $env);
}
if( $conditionResult[0] || $conditionResult[1] ){
if( $conditionResult[0] != $conditionResult[1] ){
$candidate['group'] = $conditionResult[1] ? $defTrue : $defFalse;
}
$candidates[] = $candidate;
}
}else{
$candidates[] = $candidate;
}
$match = true;
}
}
Less_Tree_DefaultFunc::reset();
$count = array(0, 0, 0);
for( $m = 0; $m < count($candidates); $m++ ){
$count[ $candidates[$m]['group'] ]++;
}
if( $count[$defNone] > 0 ){
$defaultResult = $defFalse;
} else {
$defaultResult = $defTrue;
if( ($count[$defTrue] + $count[$defFalse]) > 1 ){
throw new Exception( 'Ambiguous use of `default()` found when matching for `' . $this->format($args) . '`' );
}
}
$candidates_length = count($candidates);
$length_1 = ($candidates_length == 1);
for( $m = 0; $m < $candidates_length; $m++){
$candidate = $candidates[$m]['group'];
if( ($candidate === $defNone) || ($candidate === $defaultResult) ){
try{
$mixin = $candidates[$m]['mixin'];
if( !($mixin instanceof Less_Tree_Mixin_Definition) ){
$mixin = new Less_Tree_Mixin_Definition('', array(), $mixin->rules, null, false);
$mixin->originalRuleset = $mixins[$m]->originalRuleset;
}
$rules = array_merge($rules, $mixin->evalCall($env, $args, $this->important)->rules);
} catch (Exception $e) {
//throw new Less_Exception_Compiler($e->getMessage(), $e->index, null, $this->currentFileInfo['filename']);
throw new Less_Exception_Compiler($e->getMessage(), null, null, $this->currentFileInfo);
}
}
}
if( $match ){
if( !$this->currentFileInfo || !isset($this->currentFileInfo['reference']) || !$this->currentFileInfo['reference'] ){
Less_Tree::ReferencedArray($rules);
}
return $rules;
}
}
if( $isOneFound ){
throw new Less_Exception_Compiler('No matching definition was found for `'.$this->Format( $args ).'`', null, $this->index, $this->currentFileInfo);
}else{
throw new Less_Exception_Compiler(trim($this->selector->toCSS()) . " is undefined in ".$this->currentFileInfo['filename'], null, $this->index);
}
}
/**
* Format the args for use in exception messages
*
*/
private function Format($args){
$message = array();
if( $args ){
foreach($args as $a){
$argValue = '';
if( $a['name'] ){
$argValue .= $a['name'] . ':';
}
if( is_object($a['value']) ){
$argValue .= $a['value']->toCSS();
}else{
$argValue .= '???';
}
$message[] = $argValue;
}
}
return implode(', ',$message);
}
/**
* Are we in a recursive mixin call?
*
* @return bool
*/
private function IsRecursive( $env, $mixin ){
foreach($env->frames as $recur_frame){
if( !($mixin instanceof Less_Tree_Mixin_Definition) ){
if( $mixin === $recur_frame ){
return true;
}
if( isset($recur_frame->originalRuleset) && $mixin->ruleset_id === $recur_frame->originalRuleset ){
return true;
}
}
}
return false;
}
}