<?php

/**

 * The custom header image script.

 *

 * @package WordPress

 * @subpackage Administration

 */

/**

 * The custom header image class.

 *

 * @since 2.1.0

 * @package WordPress

 * @subpackage Administration

 */

class Custom_Image_Header {

	/**

	 * Callback for administration header.

	 *

	 * @var callback

	 * @since 2.1.0

	 * @access private

	 */

	var $admin_header_callback;

	/**

	 * Callback for header div.

	 *

	 * @var callback

	 * @since 3.0.0

	 * @access private

	 */

	var $admin_image_div_callback;

	/**

	 * Holds default headers.

	 *

	 * @var array

	 * @since 3.0.0

	 * @access private

	 */

	var $default_headers = array();

	/**

	 * Holds custom headers uploaded by the user

	 *

	 * @var array

	 * @since 3.2.0

	 * @access private

	 */

	var $uploaded_headers = array();

	/**

	 * Holds the page menu hook.

	 *

	 * @var string

	 * @since 3.0.0

	 * @access private

	 */

	var $page = '';

	/**

	 * Constructor - Register administration header callback.

	 *

	 * @since 2.1.0

	 * @param callback $admin_header_callback

	 * @param callback $admin_image_div_callback Optional custom image div output callback.

	 * @return Custom_Image_Header

	 */

	function __construct($admin_header_callback, $admin_image_div_callback = '') {

		$this->admin_header_callback = $admin_header_callback;

		$this->admin_image_div_callback = $admin_image_div_callback;

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

	}

	/**

	 * Set up the hooks for the Custom Header admin page.

	 *

	 * @since 2.1.0

	 */

	function init() {

		if ( ! current_user_can('edit_theme_options') )

			return;

		$this->page = $page = add_theme_page(__('Header'), __('Header'), 'edit_theme_options', 'custom-header', array(&$this, 'admin_page'));

		add_action("admin_print_scripts-$page", array(&$this, 'js_includes'));

		add_action("admin_print_styles-$page", array(&$this, 'css_includes'));

		add_action("admin_head-$page", array(&$this, 'help') );

		add_action("admin_head-$page", array(&$this, 'take_action'), 50);

		add_action("admin_head-$page", array(&$this, 'js'), 50);

		if ( $this->admin_header_callback )

			add_action("admin_head-$page", $this->admin_header_callback, 51);

		if ( isset( $_REQUEST['context'] ) && $_REQUEST['context'] == 'custom-header' ) {

			add_filter( 'attachment_fields_to_edit', array( $this, 'attachment_fields_to_edit' ), 10, 2 );

			add_filter( 'media_upload_tabs', array( $this, 'filter_upload_tabs' ) );

			add_filter( 'media_upload_mime_type_links', '__return_empty_array' );

		}

	}

	/**

	 * Adds contextual help.

	 *

	 * @since 3.0.0

	 */

	function help() {

		get_current_screen()->add_help_tab( array(

			'id'      => 'overview',

			'title'   => __('Overview'),

			'content' =>

				'<p>' . __( 'This screen is used to customize the header section of your theme.') . '</p>' .

				'<p>' . __( 'You can choose from the theme&#8217;s default header images, or use one of your own. You can also customize how your Site Title and Tagline are displayed.') . '<p>'

		) );

		get_current_screen()->add_help_tab( array(

			'id'      => 'set-header-image',

			'title'   => __('Header Image'),

			'content' =>

				'<p>' . __( 'You can set a custom image header for your site. Simply upload the image and crop it, and the new header will go live immediately. Alternatively, you can use an image that has already been uploaded to your Media Library by clicking the &#8220;Choose Image&#8221; button.' ) . '</p>' .

				'<p>' . __( 'Some themes come with additional header images bundled. If you see multiple images displayed, select the one you&#8217;d like and click the &#8220;Save Changes&#8221; button.' ) . '</p>' .

				'<p>' . __( 'If your theme has more than one default header image, or you have uploaded more than one custom header image, you have the option of having WordPress display a randomly different image on each page of your site. Click the &#8220;Random&#8221; radio button next to the Uploaded Images or Default Images section to enable this feature.') . '</p>' .

				'<p>' . __( 'If you don&#8217;t want a header image to be displayed on your site at all, click the &#8220;Remove Header Image&#8221; button at the bottom of the Header Image section of this page. If you want to re-enable the header image later, you just have to select one of the other image options and click &#8220;Save Changes&#8221;.') . '</p>'

		) );

		get_current_screen()->add_help_tab( array(

			'id'      => 'set-header-text',

			'title'   => __('Header Text'),

			'content' =>

				'<p>' . sprintf( __( 'For most themes, the header text is your Site Title and Tagline, as defined in the <a href="%1$s">General Settings</a> section.' ), admin_url( 'options-general.php' ) ) . '<p>' .

				'<p>' . __( 'In the Header Text section of this page, you can choose whether to display this text or hide it. You can also choose a color for the text by typing in a legitimate HTML hex value (eg: &#8220;#ff0000&#8221; for red) or by clicking &#8220;Select a Color&#8221; and dialing in a color using the color picker.') . '</p>' .

				'<p>' . __( 'Don&#8217;t forget to Save Changes when you&#8217;re done!') . '</p>'

		) );

		get_current_screen()->set_help_sidebar(

			'<p><strong>' . __( 'For more information:' ) . '</strong></p>' .

			'<p>' . __( '<a href="http://codex.wordpress.org/Appearance_Header_Screen" target="_blank">Documentation on Custom Header</a>' ) . '</p>' .

			'<p>' . __( '<a href="http://wordpress.org/support/" target="_blank">Support Forums</a>' ) . '</p>'

		);

	}

	/**

	 * Get the current step.

	 *

	 * @since 2.6.0

	 *

	 * @return int Current step

	 */

	function step() {

		if ( ! isset( $_GET['step'] ) )

			return 1;

		$step = (int) $_GET['step'];

		if ( $step < 1 || 3 < $step ||

			( 2 == $step && ! wp_verify_nonce( $_REQUEST['_wpnonce-custom-header-upload'], 'custom-header-upload' ) ) ||

			( 3 == $step && ! wp_verify_nonce( $_REQUEST['_wpnonce'], 'custom-header-crop-image' ) )

		)

			return 1;

		return $step;

	}

	/**

	 * Set up the enqueue for the JavaScript files.

	 *

	 * @since 2.1.0

	 */

	function js_includes() {

		$step = $this->step();

		if ( ( 1 == $step || 3 == $step ) ) {

			add_thickbox();

			wp_enqueue_script( 'media-upload' );

			wp_enqueue_script( 'custom-header' );

			if ( current_theme_supports( 'custom-header', 'header-text' ) )

				wp_enqueue_script('farbtastic');

		} elseif ( 2 == $step ) {

			wp_enqueue_script('imgareaselect');

		}

	}

	/**

	 * Set up the enqueue for the CSS files

	 *

	 * @since 2.7

	 */

	function css_includes() {

		$step = $this->step();

		if ( ( 1 == $step || 3 == $step ) && current_theme_supports( 'custom-header', 'header-text' ) )

			wp_enqueue_style('farbtastic');

		elseif ( 2 == $step )

			wp_enqueue_style('imgareaselect');

	}

	/**

	 * Execute custom header modification.

	 *

	 * @since 2.6.0

	 */

	function take_action() {

		if ( ! current_user_can('edit_theme_options') )

			return;

		if ( empty( $_POST ) )

			return;

		$this->updated = true;

		if ( isset( $_POST['resetheader'] ) ) {

			check_admin_referer( 'custom-header-options', '_wpnonce-custom-header-options' );

			$this->reset_header_image();

			return;

		}

		if ( isset( $_POST['resettext'] ) ) {

			check_admin_referer( 'custom-header-options', '_wpnonce-custom-header-options' );

			remove_theme_mod('header_textcolor');

			return;

		}

		if ( isset( $_POST['removeheader'] ) ) {

			check_admin_referer( 'custom-header-options', '_wpnonce-custom-header-options' );

			$this->remove_header_image();

			return;

		}

		if ( isset( $_POST['text-color'] ) && ! isset( $_POST['display-header-text'] ) ) {

			check_admin_referer( 'custom-header-options', '_wpnonce-custom-header-options' );

			set_theme_mod( 'header_textcolor', 'blank' );

		} elseif ( isset( $_POST['text-color'] ) ) {

			check_admin_referer( 'custom-header-options', '_wpnonce-custom-header-options' );

			$_POST['text-color'] = str_replace( '#', '', $_POST['text-color'] );

			$color = preg_replace('/[^0-9a-fA-F]/', '', $_POST['text-color']);

			if ( strlen($color) == 6 || strlen($color) == 3 )

				set_theme_mod('header_textcolor', $color);

			elseif ( ! $color )

				set_theme_mod( 'header_textcolor', 'blank' );

		}

		if ( isset( $_POST['default-header'] ) ) {

			check_admin_referer( 'custom-header-options', '_wpnonce-custom-header-options' );

			$this->set_header_image( $_POST['default-header'] );

			return;

		}

	}

	/**

	 * Process the default headers

	 *

	 * @since 3.0.0

	 */

	function process_default_headers() {

		global $_wp_default_headers;

		if ( !empty($this->headers) )

			return;

		if ( !isset($_wp_default_headers) )

			return;

		$this->default_headers = $_wp_default_headers;

		$template_directory_uri = get_template_directory_uri();

		$stylesheet_directory_uri = get_stylesheet_directory_uri();

		foreach ( array_keys($this->default_headers) as $header ) {

			$this->default_headers[$header]['url'] =  sprintf( $this->default_headers[$header]['url'], $template_directory_uri, $stylesheet_directory_uri );

			$this->default_headers[$header]['thumbnail_url'] =  sprintf( $this->default_headers[$header]['thumbnail_url'], $template_directory_uri, $stylesheet_directory_uri );

		}

	}

	/**

	 * Display UI for selecting one of several default headers.

	 *

	 * Show the random image option if this theme has multiple header images.

	 * Random image option is on by default if no header has been set.

	 *

	 * @since 3.0.0

	 */

	function show_header_selector( $type = 'default' ) {

		if ( 'default' == $type ) {

			$headers = $this->default_headers;

		} else {

			$headers = get_uploaded_header_images();

			$type = 'uploaded';

		}

		if ( 1 < count( $headers ) ) {

			echo '<div class="random-header">';

			echo '<label><input name="default-header" type="radio" value="random-' . $type . '-image"' . checked( is_random_header_image( $type ), true, false ) . ' />';

			echo __( '<strong>Random:</strong> Show a different image on each page.' );

			echo '</label>';

			echo '</div>';

		}

		echo '<div class="available-headers">';

		foreach ( $headers as $header_key => $header ) {

			$header_thumbnail = $header['thumbnail_url'];

			$header_url = $header['url'];

			$header_desc = empty( $header['description'] ) ? '' : $header['description'];

			echo '<div class="default-header">';

			echo '<label><input name="default-header" type="radio" value="' . esc_attr( $header_key ) . '" ' . checked( $header_url, get_theme_mod( 'header_image' ), false ) . ' />';

			$width = '';

			if ( !empty( $header['attachment_id'] ) )

				$width = ' width="230"';

			echo '<img src="' . set_url_scheme( $header_thumbnail ) . '" alt="' . esc_attr( $header_desc ) .'" title="' . esc_attr( $header_desc ) . '"' . $width . ' /></label>';

			echo '</div>';

		}

		echo '<div class="clear"></div></div>';

	}

	/**

	 * Execute Javascript depending on step.

	 *

	 * @since 2.1.0

	 */

	function js() {

		$step = $this->step();

		if ( ( 1 == $step || 3 == $step ) && current_theme_supports( 'custom-header', 'header-text' ) )

			$this->js_1();

		elseif ( 2 == $step )

			$this->js_2();

	}

	/**

	 * Display Javascript based on Step 1 and 3.

	 *

	 * @since 2.6.0

	 */

	function js_1() { ?>

<script type="text/javascript">

/* <![CDATA[ */

var farbtastic;

(function($){

	var default_color = '#<?php echo get_theme_support( 'custom-header', 'default-text-color' ); ?>',

		header_text_fields;

	function pickColor(color) {

		$('#name').css('color', color);

		$('#desc').css('color', color);

		$('#text-color').val(color);

		farbtastic.setColor(color);

	}

	function toggle_text() {

		var checked = $('#display-header-text').prop('checked'),

			text_color;

		header_text_fields.toggle( checked );

		if ( ! checked )

			return;

		text_color = $('#text-color');

		if ( '' == text_color.val().replace('#', '') ) {

			text_color.val( default_color );

			pickColor( default_color );

		} else {

			pickColor( text_color.val() );

		}

	}

	$(document).ready(function() {

		header_text_fields = $('.displaying-header-text');

		$('#pickcolor').click(function(e) {

			e.preventDefault();

			$('#color-picker').show();

		});

		$('#display-header-text').click( toggle_text );

		$('#defaultcolor').click(function() {

			pickColor(default_color);

			$('#text-color').val(default_color);

		});

		$('#text-color').keyup(function() {

			var _hex = $('#text-color').val();

			var hex = _hex;

			if ( hex[0] != '#' )

				hex = '#' + hex;

			hex = hex.replace(/[^#a-fA-F0-9]+/, '');

			if ( hex != _hex )

				$('#text-color').val(hex);

			if ( hex.length == 4 || hex.length == 7 )

				pickColor( hex );

		});

		$(document).mousedown(function(){

			$('#color-picker').each( function() {

				var display = $(this).css('display');

				if (display == 'block')

					$(this).fadeOut(2);

			});

		});

		farbtastic = $.farbtastic('#color-picker', function(color) { pickColor(color); });

		<?php if ( display_header_text() ) { ?>

		pickColor('#<?php echo get_header_textcolor(); ?>');

		<?php } else { ?>

		toggle_text();

		<?php } ?>

	});

})(jQuery);

/* ]]> */

</script>

<?php

	}

	/**

	 * Display Javascript based on Step 2.

	 *