root/trunk/wp-admin/custom-header.php

<?php
/**
 * The custom header image script.
 *
 * @package WordPress
 * @subpackage Administration
 */

/**
 * The custom header image class.
 *
 * @since unknown
 * @package WordPress
 * @subpackage Administration
 */
class Custom_Image_Header {

    /**
     * Callback for administration header.
     *
     * @var callback
     * @since unknown
     * @access private
     */
    var $admin_header_callback;

    /**
     * PHP4 Constructor - Register administration header callback.
     *
     * @since unknown
     * @param callback $admin_header_callback
     * @return Custom_Image_Header
     */
    function Custom_Image_Header($admin_header_callback) {
        $this->admin_header_callback = $admin_header_callback;
    }

    /**
     * Setup the hooks for the Custom Header admin page.
     *
     * @since unknown
     */
    function init() {
        $page = add_theme_page(__('Custom Image Header'), __('Custom Image Header'), 'edit_themes', 'custom-header', array(&$this, 'admin_page'));

        add_action("admin_print_scripts-$page", array(&$this, 'js_includes'));
        add_action("admin_head-$page", array(&$this, 'take_action'), 50);
        add_action("admin_head-$page", array(&$this, 'js'), 50);
        add_action("admin_head-$page", $this->admin_header_callback, 51);
    }

    /**
     * Get the current step.
     *
     * @since unknown
     *
     * @return int Current step
     */
    function step() {
        if ( ! isset( $_GET['step'] ) )
            return 1;

        $step = (int) $_GET['step'];
        if ( $step < 1 || 3 < $step )
            $step = 1;

        return $step;
    }

    /**
     * Setup the enqueue for the JavaScript files.
     *
     * @since unknown
     */
    function js_includes() {
        $step = $this->step();

        if ( 1 == $step )
            wp_enqueue_script('colorpicker');
        elseif ( 2 == $step )
            wp_enqueue_script('cropper');
    }

    /**
     * Execute custom header modification.
     *
     * @since unknown
     */
    function take_action() {
        if ( isset( $_POST['textcolor'] ) ) {
            check_admin_referer('custom-header');
            if ( 'blank' == $_POST['textcolor'] ) {
                set_theme_mod('header_textcolor', 'blank');
            } else {
                $color = preg_replace('/[^0-9a-fA-F]/', '', $_POST['textcolor']);
                if ( strlen($color) == 6 || strlen($color) == 3 )
                    set_theme_mod('header_textcolor', $color);
            }
        }
        if ( isset($_POST['resetheader']) ) {
            check_admin_referer('custom-header');
            remove_theme_mods();
        }
    }

    /**
     * Execute Javascript depending on step.
     *
     * @since unknown
     */
    function js() {
        $step = $this->step();
        if ( 1 == $step )
            $this->js_1();
        elseif ( 2 == $step )
            $this->js_2();
    }

    /**
     * Display Javascript based on Step 1.
     *
     * @since unknown
     */
    function js_1() { ?>
<script type="text/javascript">
    var cp = new ColorPicker();

    function pickColor(color) {
        $('name').style.color = color;
        $('desc').style.color = color;
        $('textcolor').value = color;
    }
    function PopupWindow_hidePopup(magicword) {
        if ( magicword != 'prettyplease' )
            return false;
        if (this.divName != null) {
            if (this.use_gebi) {
                document.getElementById(this.divName).style.visibility = "hidden";
            }
            else if (this.use_css) {
                document.all[this.divName].style.visibility = "hidden";
            }
            else if (this.use_layers) {
                document.layers[this.divName].visibility = "hidden";
            }
        }
        else {
            if (this.popupWindow && !this.popupWindow.closed) {
                this.popupWindow.close();
                this.popupWindow = null;
            }
        }
        return false;
    }
    function colorSelect(t,p) {
        if ( cp.p == p && document.getElementById(cp.divName).style.visibility != "hidden" ) {
            cp.hidePopup('prettyplease');
        } else {
            cp.p = p;
            cp.select(t,p);
        }
    }
    function colorDefault() {
        pickColor('#<?php echo HEADER_TEXTCOLOR; ?>');
    }

    function hide_text() {
        $('name').style.display = 'none';
        $('desc').style.display = 'none';
        $('pickcolor').style.display = 'none';
        $('defaultcolor').style.display = 'none';
        $('textcolor').value = 'blank';
        $('hidetext').value = '<?php _e('Show Text'); ?>';
//        $('hidetext').onclick = 'show_text()';
        Event.observe( $('hidetext'), 'click', show_text );
    }

    function show_text() {
        $('name').style.display = 'block';
        $('desc').style.display = 'block';
        $('pickcolor').style.display = 'inline';
        $('defaultcolor').style.display = 'inline';
        $('textcolor').value = '<?php echo HEADER_TEXTCOLOR; ?>';
        $('hidetext').value = '<?php _e('Hide Text'); ?>';
        Event.stopObserving( $('hidetext'), 'click', show_text );
        Event.observe( $('hidetext'), 'click', hide_text );
    }

    <?php if ( 'blank' == get_theme_mod('header_textcolor', HEADER_TEXTCOLOR) ) { ?>
Event.observe( window, 'load', hide_text );
    <?php } ?>

</script>
<?php
    }

    /**
     * Display Javascript based on Step 2.
     *
     * @since unknown
     */
    function js_2() { ?>
<script type="text/javascript">
    function onEndCrop( coords, dimensions ) {
        $( 'x1' ).value = coords.x1;
        $( 'y1' ).value = coords.y1;
        $( 'x2' ).value = coords.x2;
        $( 'y2' ).value = coords.y2;
        $( 'width' ).value = dimensions.width;
        $( 'height' ).value = dimensions.height;
    }

    // with a supplied ratio
    Event.observe(
        window,
        'load',
        function() {
            var xinit = <?php echo HEADER_IMAGE_WIDTH; ?>;
            var yinit = <?php echo HEADER_IMAGE_HEIGHT; ?>;
            var ratio = xinit / yinit;
            var ximg = $('upload').width;
            var yimg = $('upload').height;
            if ( yimg < yinit || ximg < xinit ) {
                if ( ximg / yimg > ratio ) {
                    yinit = yimg;
                    xinit = yinit * ratio;
                } else {
                    xinit = ximg;
                    yinit = xinit / ratio;
                }
            }
            new Cropper.Img(
                'upload',
                {
                    ratioDim: { x: xinit, y: yinit },
                    displayOnInit: true,
                    onEndCrop: onEndCrop
                }
            )
        }
    );
</script>
<?php
    }

    /**
     * Display first step of custom header image page.
     *
     * @since unknown
     */
    function step_1() {
        if ( $_GET['updated'] ) { ?>
<div id="message" class="updated fade">
<p><?php _e('Header updated.') ?></p>
</div>
        <?php } ?>

<div class="wrap">
<h2><?php _e('Your Header Image'); ?></h2>
<p><?php _e('This is your header image. You can change the text color or upload and crop a new image.'); ?></p>

<div id="headimg" style="background-image: url(<?php clean_url(header_image()) ?>);">
<h1><a onclick="return false;" href="<?php bloginfo('url'); ?>" title="<?php bloginfo('name'); ?>" id="name"><?php bloginfo('name'); ?></a></h1>
<div id="desc"><?php bloginfo('description');?></div>
</div>
<?php if ( !defined( 'NO_HEADER_TEXT' ) ) { ?>
<form method="post" action="<?php echo admin_url('themes.php?page=custom-header&amp;updated=true') ?>">
<input type="button" value="<?php _e('Hide Text'); ?>" onclick="hide_text()" id="hidetext" />
<input type="button" value="<?php _e('Select a Text Color'); ?>" onclick="colorSelect($('textcolor'), 'pickcolor')" id="pickcolor" /><input type="button" value="<?php _e('Use Original Color'); ?>" onclick="colorDefault()" id="defaultcolor" />
<?php wp_nonce_field('custom-header') ?>
<input type="hidden" name="textcolor" id="textcolor" value="#<?php attribute_escape(header_textcolor()) ?>" /><input name="submit" type="submit" value="<?php _e('Save Changes'); ?>" /></form>
<?php } ?>

<div id="colorPickerDiv" style="z-index: 100;background:#eee;border:1px solid #ccc;position:absolute;visibility:hidden;"> </div>
</div>
<div class="wrap">
<h2><?php _e('Upload New Header Image'); ?></h2><p><?php _e('Here you can upload a custom header image to be shown at the top of your blog instead of the default one. On the next screen you will be able to crop the image.'); ?></p>
<p><?php printf(__('Images of exactly <strong>%1$d x %2$d pixels</strong> will be used as-is.'), HEADER_IMAGE_WIDTH, HEADER_IMAGE_HEIGHT); ?></p>

<form enctype="multipart/form-data" id="uploadForm" method="POST" action="<?php echo attribute_escape(add_query_arg('step', 2)) ?>" style="margin: auto; width: 50%;">
<label for="upload"><?php _e('Choose an image from your computer:'); ?></label><br /><input type="file" id="upload" name="import" />
<input type="hidden" name="action" value="save" />
<?php wp_nonce_field('custom-header') ?>
<p class="submit">
<input type="submit" value="<?php _e('Upload'); ?>" />
</p>
</form>

</div>

        <?php if ( get_theme_mod('header_image') || get_theme_mod('header_textcolor') ) : ?>
<div class="wrap">
<h2><?php _e('Reset Header Image and Color'); ?></h2>
<p><?php _e('This will restore the original header image and color. You will not be able to retrieve any customizations.') ?></p>
<form method="post" action="<?php echo attribute_escape(add_query_arg('step', 1)) ?>">
<?php wp_nonce_field('custom-header'); ?>
<input type="submit" name="resetheader" value="<?php _e('Restore Original Header'); ?>" />
</form>
</div>
        <?php endif;

    }

    /**
     * Display second step of custom header image page.
     *
     * @since unknown
     */
    function step_2() {
        check_admin_referer('custom-header');
        $overrides = array('test_form' => false);
        $file = wp_handle_upload($_FILES['import'], $overrides);

        if ( isset($file['error']) )
        die( $file['error'] );

        $url = $file['url'];
        $type = $file['type'];
        $file = $file['file'];
        $filename = basename($file);

        // Construct the object array
        $object = array(
        'post_title' => $filename,
        'post_content' => $url,
        'post_mime_type' => $type,
        'guid' => $url);

        // Save the data
        $id = wp_insert_attachment($object, $file);

        list($width, $height, $type, $attr) = getimagesize( $file );

        if ( $width == HEADER_IMAGE_WIDTH && $height == HEADER_IMAGE_HEIGHT ) {
            // Add the meta-data
            wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $file ) );

            set_theme_mod('header_image', clean_url($url));
            do_action('wp_create_file_in_uploads', $file, $id); // For replication
            return $this->finished();
        } elseif ( $width > HEADER_IMAGE_WIDTH ) {
            $oitar = $width / HEADER_IMAGE_WIDTH;
            $image = wp_crop_image($file, 0, 0, $width, $height, HEADER_IMAGE_WIDTH, $height / $oitar, false, str_replace(basename($file), 'midsize-'.basename($file), $file));
            $image = apply_filters('wp_create_file_in_uploads', $image, $id); // For replication

            $url = str_replace(basename($url), basename($image), $url);
            $width = $width / $oitar;
            $height = $height / $oitar;
        } else {
            $oitar = 1;
        }
        ?>

<div class="wrap">

<form method="POST" action="<?php echo attribute_escape(add_query_arg('step', 3)) ?>">

<p><?php _e('Choose the part of the image you want to use as your header.'); ?></p>
<div id="testWrap" style="position: relative">
<img src="<?php echo $url; ?>" id="upload" width="<?php echo $width; ?>" height="<?php echo $height; ?>" />
</div>

<p class="submit">
<input type="hidden" name="x1" id="x1" />
<input type="hidden" name="y1" id="y1" />
<input type="hidden" name="x2" id="x2" />
<input type="hidden" name="y2" id="y2" />
<input type="hidden" name="width" id="width" />
<input type="hidden" name="height" id="height" />
<input type="hidden" name="attachment_id" id="attachment_id" value="<?php echo $id; ?>" />
<input type="hidden" name="oitar" id="oitar" value="<?php echo $oitar; ?>" />
<?php wp_nonce_field('custom-header') ?>
<input type="submit" value="<?php _e('Crop Header'); ?>" />
</p>

</form>
</div>
        <?php
    }

    /**
     * Display third step of custom header image page.
     *
     * @since unknown
     */
    function step_3() {
        check_admin_referer('custom-header');
        if ( $_POST['oitar'] > 1 ) {
            $_POST['x1'] = $_POST['x1'] * $_POST['oitar'];
            $_POST['y1'] = $_POST['y1'] * $_POST['oitar'];
            $_POST['width'] = $_POST['width'] * $_POST['oitar'];
            $_POST['height'] = $_POST['height'] * $_POST['oitar'];
        }

        $original = get_attached_file( $_POST['attachment_id'] );

        $cropped = wp_crop_image($_POST['attachment_id'], $_POST['x1'], $_POST['y1'], $_POST['width'], $_POST['height'], HEADER_IMAGE_WIDTH, HEADER_IMAGE_HEIGHT);
        $cropped = apply_filters('wp_create_file_in_uploads', $cropped, $_POST['attachment_id']); // For replication

        $parent = get_post($_POST['attachment_id']);
        $parent_url = $parent->guid;
        $url = str_replace(basename($parent_url), basename($cropped), $parent_url);

        // Construct the object array
        $object = array(
            'ID' => $_POST['attachment_id'],
            'post_title' => basename($cropped),
            'post_content' => $url,
            'post_mime_type' => 'image/jpeg',
            'guid' => $url
        );

        // Update the attachment
        wp_insert_attachment($object, $cropped);
        wp_update_attachment_metadata( $_POST['attachment_id'], wp_generate_attachment_metadata( $_POST['attachment_id'], $cropped ) );

        set_theme_mod('header_image', $url);

        // cleanup
        $medium = str_replace(basename($original), 'midsize-'.basename($original), $original);
        @unlink( apply_filters( 'wp_delete_file', $medium ) );
        @unlink( apply_filters( 'wp_delete_file', $original ) );

        return $this->finished();
    }

    /**
     * Display last step of custom header image page.
     *
     * @since unknown
     */
    function finished() {
        ?>
<div class="wrap">
<h2><?php _e('Header complete!'); ?></h2>

<p><?php _e('Visit your site and you should see the new header now.'); ?></p>

</div>
        <?php
    }

    /**
     * Display the page based on the current step.
     *
     * @since unknown
     */
    function admin_page() {
        $step = $this->step();
        if ( 1 == $step )
            $this->step_1();
        elseif ( 2 == $step )
            $this->step_2();
        elseif ( 3 == $step )
            $this->step_3();
    }

}
?>