<?php

/**

 * BackPress Scripts enqueue.

 *

 * These classes were refactored from the WordPress WP_Scripts and WordPress

 * script enqueue API.

 *

 * @package BackPress

 * @since r16

 */

/**

 * BackPress Scripts enqueue class.

 *

 * @package BackPress

 * @uses WP_Dependencies

 * @since r16

 */

class WP_Scripts extends WP_Dependencies {

	var $base_url; // Full URL with trailing slash

	var $content_url;

	var $default_version;

	var $in_footer = array();

	var $concat = '';

	var $concat_version = '';

	var $do_concat = false;

	var $print_html = '';

	var $print_code = '';

	var $ext_handles = '';

	var $ext_version = '';

	var $default_dirs;

	function __construct() {

		$this->init();

		add_action( 'init', array( $this, 'init' ), 0 );

	}

	function init() {

		do_action_ref_array( 'wp_default_scripts', array(&$this) );

	}

	/**

	 * Prints scripts

	 *

	 * Prints the scripts passed to it or the print queue. Also prints all necessary dependencies.

	 *

	 * @param mixed $handles (optional) Scripts to be printed. (void) prints queue, (string) prints that script, (array of strings) prints those scripts.

	 * @param int $group (optional) If scripts were queued in groups prints this group number.

	 * @return array Scripts that have been printed

	 */

	function print_scripts( $handles = false, $group = false ) {

		return $this->do_items( $handles, $group );

	}

	// Deprecated since 3.3, see print_extra_script()

	function print_scripts_l10n( $handle, $echo = true ) {

		_deprecated_function( __FUNCTION__, '3.3', 'print_extra_script()' );

		return $this->print_extra_script( $handle, $echo );

	}

	function print_extra_script( $handle, $echo = true ) {

		if ( !$output = $this->get_data( $handle, 'data' ) )

			return;

		if ( !$echo )

			return $output;

		echo "<script type='text/javascript'>\n"; // CDATA and type='text/javascript' is not needed for HTML 5

		echo "/* <![CDATA[ */\n";

		echo "$output\n";

		echo "/* ]]> */\n";

		echo "</script>\n";

		return true;

	}

	function do_item( $handle, $group = false ) {

		if ( !parent::do_item($handle) )

			return false;

		if ( 0 === $group && $this->groups[$handle] > 0 ) {

			$this->in_footer[] = $handle;

			return false;

		}

		if ( false === $group && in_array($handle, $this->in_footer, true) )

			$this->in_footer = array_diff( $this->in_footer, (array) $handle );

		if ( null === $this->registered[$handle]->ver )

			$ver = '';

		else

			$ver = $this->registered[$handle]->ver ? $this->registered[$handle]->ver : $this->default_version;

		if ( isset($this->args[$handle]) )

			$ver = $ver ? $ver . '&' . $this->args[$handle] : $this->args[$handle];

		$src = $this->registered[$handle]->src;

		if ( $this->do_concat ) {

			$srce = apply_filters( 'script_loader_src', $src, $handle );

			if ( $this->in_default_dir($srce) ) {

				$this->print_code .= $this->print_extra_script( $handle, false );

				$this->concat .= "$handle,";

				$this->concat_version .= "$handle$ver";

				return true;

			} else {

				$this->ext_handles .= "$handle,";

				$this->ext_version .= "$handle$ver";

			}

		}

		$this->print_extra_script( $handle );

		if ( !preg_match('|^(https?:)?//|', $src) && ! ( $this->content_url && 0 === strpos($src, $this->content_url) ) ) {

			$src = $this->base_url . $src;

		}

		if ( !empty($ver) )

			$src = add_query_arg('ver', $ver, $src);

		$src = esc_url( apply_filters( 'script_loader_src', $src, $handle ) );

		if ( ! $src )

			return true;

		if ( $this->do_concat )

			$this->print_html .= "<script type='text/javascript' src='$src'></script>\n";

		else

			echo "<script type='text/javascript' src='$src'></script>\n";

		return true;

	}

	/**

	 * Localizes a script

	 *

	 * Localizes only if the script has already been added

	 */

	function localize( $handle, $object_name, $l10n ) {

		if ( $handle === 'jquery' )

			$handle = 'jquery-core';

		if ( is_array($l10n) && isset($l10n['l10n_print_after']) ) { // back compat, preserve the code in 'l10n_print_after' if present

			$after = $l10n['l10n_print_after'];

			unset($l10n['l10n_print_after']);

		}

		foreach ( (array) $l10n as $key => $value ) {

			if ( !is_scalar($value) )

				continue;

			$l10n[$key] = html_entity_decode( (string) $value, ENT_QUOTES, 'UTF-8');

		}

		$script = "var $object_name = " . json_encode($l10n) . ';';

		if ( !empty($after) )

			$script .= "\n$after;";

		$data = $this->get_data( $handle, 'data' );

		if ( !empty( $data ) )

			$script = "$data\n$script";

		return $this->add_data( $handle, 'data', $script );

	}

	function set_group( $handle, $recursion, $group = false ) {

		if ( $this->registered[$handle]->args === 1 )

			$grp = 1;

		else

			$grp = (int) $this->get_data( $handle, 'group' );

		if ( false !== $group && $grp > $group )

			$grp = $group;

		return parent::set_group( $handle, $recursion, $grp );

	}

	function all_deps( $handles, $recursion = false, $group = false ) {

		$r = parent::all_deps( $handles, $recursion );

		if ( !$recursion )

			$this->to_do = apply_filters( 'print_scripts_array', $this->to_do );

		return $r;

	}

	function do_head_items() {

		$this->do_items(false, 0);

		return $this->done;

	}

	function do_footer_items() {

		$this->do_items(false, 1);

		return $this->done;

	}

	function in_default_dir($src) {

		if ( ! $this->default_dirs )

			return true;

		if ( 0 === strpos( $src, '/wp-includes/js/l10n' ) )

			return false;

		foreach ( (array) $this->default_dirs as $test ) {

			if ( 0 === strpos($src, $test) )

				return true;

		}

		return false;

	}

	function reset() {

		$this->do_concat = false;

		$this->print_code = '';

		$this->concat = '';

		$this->concat_version = '';

		$this->print_html = '';

		$this->ext_version = '';

		$this->ext_handles = '';

	}

}