<?php

/**
 * Url
 *
 * @package Less
 * @subpackage tree
 */
class Less_Tree_Url extends Less_Tree {

    public $attrs;
    public $value;
    public $currentFileInfo;
    public $isEvald;
    public $type = 'Url';

    public function __construct($value, $currentFileInfo = NULL, $isEvald = NULL) {
        $this->value = $value;
        $this->currentFileInfo = $currentFileInfo;
        $this->isEvald = $isEvald;
    }

    public function accept($visitor) {
        $this->value = $visitor->visitObj($this->value);
    }

    /**
     * @see Less_Tree::genCSS
     */
    public function genCSS($output) {
        $output->add('url(');
        $this->value->genCSS($output);
        $output->add(')');
    }

    /**
     * @param Less_Functions $ctx
     */
    public function compile($ctx) {
        $val = $this->value->compile($ctx);

        if (!$this->isEvald) {
            // Add the base path if the URL is relative
            if (Less_Parser::$options['relativeUrls']
                && $this->currentFileInfo
                && is_string($val->value)
                && Less_Environment::isPathRelative($val->value)
            ) {
                $rootpath = $this->currentFileInfo['uri_root'];
                if (!$val->quote) {
                    $rootpath = preg_replace('/[\(\)\'"\s]/', '\\$1', $rootpath);
                }
                $val->value = $rootpath.$val->value;
            }

            $val->value = Less_Environment::normalizePath($val->value);
        }

        // Add cache buster if enabled
        if (Less_Parser::$options['urlArgs']) {
            if (!preg_match('/^\s*data:/', $val->value)) {
                $delimiter = strpos($val->value, '?') === FALSE ? '?' : '&';
                $urlArgs = $delimiter.Less_Parser::$options['urlArgs'];
                $hash_pos = strpos($val->value, '#');
                if ($hash_pos !== FALSE) {
                    $val->value = substr_replace($val->value, $urlArgs, $hash_pos, 0);
                } else {
                    $val->value .= $urlArgs;
                }
            }
        }

        return new Less_Tree_URL($val, $this->currentFileInfo, TRUE);
    }

}