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<?php
/**
* @private
*/
class Less_Tree_Mixin_Definition extends Less_Tree_Ruleset {
public $name;
public $selectors;
public $params;
public $arity = 0;
public $rules;
public $lookups = [];
public $required = 0;
public $frames = [];
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 = [] ) {
$this->name = $name;
$this->selectors = [ new Less_Tree_Selector( [ 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, $args = [], &$evaldArguments = [] ) {
$frame = new Less_Tree_Ruleset( null, [] );
$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 = [];
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 );
} elseif ( isset( $param['value'] ) ) {
if ( !$mixinEnv ) {
$mixinEnv = new Less_Environment();
$mixinEnv->frames = array_merge( [ $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 = [];
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( [ $this, $frame ], $mixinFrames );
$ruleset = $ruleset->compile( $ruleSetEnv );
if ( $important ) {
$ruleset = $ruleset->makeImportant();
}
Less_Environment::$mixin_stack--;
return $ruleset;
}
/** @return bool */
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 = [];
}
$frame = $this->compileParams( $env, array_merge( $this->frames, $env->frames ), $args );
$compile_env = new Less_Environment();
$compile_env->frames = array_merge(
[ $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;
}
}