<?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() {

		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 );

	}

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

		if ( empty($this->registered[$handle]->extra['l10n']) || empty($this->registered[$handle]->extra['l10n'][0]) || !is_array($this->registered[$handle]->extra['l10n'][1]) )

			return false;

		$object_name = $this->registered[$handle]->extra['l10n'][0];

		$data = "var $object_name = {\n";

		$eol = '';

		foreach ( $this->registered[$handle]->extra['l10n'][1] as $var => $val ) {

			if ( 'l10n_print_after' == $var ) {

				$after = $val;

				continue;

			}

			$data .= "$eol\t$var: \"" . esc_js( $val ) . '"';

			$eol = ",\n";

		}

		$data .= "\n};\n";

		$data .= isset($after) ? "$after\n" : '';

		if ( $echo ) {

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

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

			echo $data;

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

			echo "</script>\n";

			return true;

		} else {

			return $data;

		}

	}

	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 );

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

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

			$ver .= '&' . $this->args[$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_scripts_l10n( $handle, false );

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

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

				return true;

			} else {

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

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

			}

		}

		$this->print_scripts_l10n( $handle );

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

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

		}

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

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

		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 script has already been added

	 *

	 * @param string handle Script name

	 * @param string object_name Name of JS object to hold l10n info

	 * @param array l10n Array of JS var name => localized string

	 * @return bool Successful localization

	 */

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

		if ( !$object_name || !$l10n )

			return false;

		return $this->add_data( $handle, 'l10n', array( $object_name, $l10n ) );

	}

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

		$grp = isset($this->registered[$handle]->extra['group']) ? (int) $this->registered[$handle]->extra['group'] : 0;

		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() {

		if ( !empty($this->in_footer) ) {

			foreach( $this->in_footer as $key => $handle ) {

				if ( !in_array($handle, $this->done, true) && isset($this->registered[$handle]) ) {

					$this->do_item($handle);

					$this->done[] = $handle;

					unset( $this->in_footer[$key] );

				}

			}

		}

		return $this->done;

	}

	function in_default_dir($src) {

		if ( ! $this->default_dirs )

			return true;

		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 = '';

	}

}