Ticket #4169: widgets.php

<?php
/*
Plugin Name: Sidebar Widgets
Plugin URI: http://svn.wp-plugins.org/widgets/trunk
Description: Adds "Sidebar Widgets" panel under Presentation menu
Author: Automattic, Inc.
Author URI: http://automattic.com/
Version: 1.0.20060724
*/


//////////////////////////////////////////////////////////// Global Variables

$registered_sidebars = array();
$registered_widgets = array();
$registered_widget_controls = array();
$registered_widget_styles = array();
$register_widget_defaults = false; // When true, registration is non-destructive.

//////////////////////////////////////////////////////////// Public Functions

function register_sidebars($number = 1, $args = array()) {
    global $registered_sidebars;

    $number = (int) $number;

    if ( is_string($args) )
        parse_str($args, $args);

    $i = 1;

    while ( $i <= $number ) {
        $_args = $args;
        if ( $number > 1 ) {
            $_args['name'] = isset($args['name']) ? $args['name'] : sprintf(__('Sidebar %d', 'widgets'), $i);
        } else {
            $_args['name'] = isset($args['name']) ? $args['name'] : __('Sidebar', 'widgets');
        }
        $_args['id'] = isset($args['id']) ? $args['id'] : "sidebar-$i";
        register_sidebar($_args);
        ++$i;
    }
}

function register_sidebar($args = array()) {
    global $registered_sidebars;

    if ( is_string($args) )
        parse_str($args, $args);

    $i = count($registered_sidebars) + 1;

    $defaults = array(
        'name' => sprintf(__('Sidebar %d', 'widgets'), count($registered_sidebars) + 1 ),
        'id' => "sidebar-$i",
        'before_widget' => '<li id="%1$s" class="widget %2$s">',
        'after_widget' => "</li>\n",
        'before_title' => '<h2 class="widgettitle">',
        'after_title' => "</h2>\n",
    );

    $sidebar = array_merge($defaults, $args);

    $registered_sidebars[$sidebar['id']] = $sidebar;

    return $sidebar['id'];
}

function unregister_sidebar($index) {
    global $registered_sidebars;

    unset( $registered_sidebars[$index] );
}

function register_sidebar_widget($name, $output_callback, $classname = '', $id = '') {
    global $registered_widgets, $register_widget_defaults;

    // Compat
    if ( is_array($name) ) {
        if ( count($name) == 3 )
            $name = sprintf($name[0], $name[2]);
        else
            $name = $name[0];
    }

    // Last resort -- this can be broken when names get translated so please provide a unique id.
    if ( !isset($id) )
        $id = sanitize_title($name);

    if ( (!isset($classname) || empty($classname) || !is_string($classname)) && is_string($output_callback) )
            $classname = $output_callback;

    $widget = array(
        'name' => $name,
        'id' => $id,
        'callback' => $output_callback,
        'classname' => $classname,
        'params' => array_slice(func_get_args(), 4)
    );

    if ( empty($output_callback) )
        unset($registered_widgets[$id]);
    elseif ( is_callable($output_callback) && ( !isset($registered_widgets[$id]) || !$register_widget_defaults) )
        $registered_widgets[$id] = $widget;
}

function unregister_sidebar_widget($id) {
    $id = sanitize_title($id);
    register_sidebar_widget('', '', '', $id);
    unregister_widget_control($id);
}

function register_widget_control($name, $control_callback, $width = 300, $height = 200, $id = '') {
    global $registered_widget_controls, $register_widget_defaults;

    // Compat
    if ( is_array($name) ) {
        if ( count($name) == 3 )
            $name = sprintf($name[0], $name[2]);
        else
            $name = $name[0];
    }

    if ( !isset($id) || empty($id) )
        $id = $name;

    $id = sanitize_title($id);

    $width = (int) $width > 90 ? (int) $width + 60 : 360;
    $height = (int) $height > 60 ? (int) $height + 40 : 240;

    if ( empty($control_callback) )
        unset($registered_widget_controls[$name]);
    elseif ( !isset($registered_widget_controls[$name]) || !$register_widget_defaults )
        $registered_widget_controls[$id] = array(
            'name' => $name,
            'id' => $id,
            'callback' => $control_callback,
            'width' => $width,
            'height' => $height,
            'params' => array_slice(func_get_args(), 5)
        );
}

function unregister_widget_control($id) {
    $id = sanitize_title($id);
    return register_widget_control($id, '');
}

function dynamic_sidebar($index = 1) {
    global $registered_sidebars, $registered_widgets;

    if ( is_int($index) ) {
        $index = "sidebar-$index";
    } else {
        $index = sanitize_title($index);
    }

    $sidebars_widgets = get_sidebars_widgets();

    if ( empty($registered_sidebars[$index]) || !is_array($sidebars_widgets[$index]) || empty($sidebars_widgets[$index]) )
        return false;

    $sidebar = $registered_sidebars[$index];

    $did_one = false;
    foreach ( $sidebars_widgets[$index] as $id ) {
        $callback = $registered_widgets[$id]['callback'];

        $params = array_merge(array($sidebar), (array) $registered_widgets[$id]['params']);

        // Substitute HTML id and class attributes into before_widget
        $params[0]['before_widget'] = sprintf($params[0]['before_widget'], $id, $registered_widgets[$id]['classname']);

        if ( is_callable($callback) ) {
            call_user_func_array($callback, $params);
            $did_one = true;
        }
    }

    return $did_one;
}

function is_active_widget($callback) {
    global $registered_widgets;

    $sidebars_widgets = get_sidebars_widgets(false);

    if ( is_array($sidebars_widgets) ) foreach ( $sidebars_widgets as $sidebar => $widgets )
        if ( is_array($widgets) ) foreach ( $widgets as $widget )
            if ( $registered_widgets[$widget]['callback'] == $callback )
                return true;

    return false;
}

function is_dynamic_sidebar() {
    global $registered_widgets, $registered_sidebars;
    $sidebars_widgets = get_option('sidebars_widgets');
    foreach ( $registered_sidebars as $index => $sidebar ) {
        if ( count($sidebars_widgets[$index]) ) {
            foreach ( $sidebars_widgets[$index] as $widget )
                if ( array_key_exists($widget, $registered_widgets) )
                    return true;
        }
    }
    return false;
}

//////////////////////////////////////////////////////////// Private Functions

function get_sidebars_widgets($update = true) {
    global $registered_widgets;

    $sidebars_widgets = get_option('sidebars_widgets');
    $_sidebars_widgets = array();

    if ( !isset($sidebars_widgets['array_version']) )
        $sidebars_widgets['array_version'] = 1;

    switch ( $sidebars_widgets['array_version'] ) {
        case 1 :
            foreach ( $sidebars_widgets as $index => $sidebar )
            if ( is_array($sidebar) )
            foreach ( $sidebar as $i => $name ) {
                $id = strtolower($name);
                if ( isset($registered_widgets[$id]) ) {
                    $_sidebars_widgets[$index][$i] = $id;
                    continue;
                }
                $id = sanitize_title($name);
                if ( isset($registered_widgets[$id]) ) {
                    $_sidebars_widgets[$index][$i] = $id;
                    continue;
                }
                unset($_sidebars_widgets[$index][$i]);
            }
            $_sidebars_widgets['array_version'] = 2;
            if ( $update )
                update_option('sidebars_widgets', $_sidebars_widgets);
            break;
        case 2 :
            $_sidebars_widgets = $sidebars_widgets;
            break;
    }

    unset($_sidebars_widgets['array_version']);

    return $_sidebars_widgets;
}

function sidebar_admin_setup() {
    global $registered_sidebars, $registered_widgets;
    if ( count($registered_sidebars) < 1 )
        return;
    $page = preg_replace('!^.*[\\\\/]wp-content[\\\\/][^\\\\/]*plugins[\\\\/]!', '', __FILE__);
    $page = str_replace('\\', '/', $page);
    add_submenu_page('themes.php', __('Sidebar Widgets', 'widgets'), __('Sidebar Widgets', 'widgets'), 5, $page, 'sidebar_admin_page');
    if ( $_GET['page'] == $page ) {
        if ( isset($_POST['action']) && $_POST['action'] == 'save_widget_order' ) {
            check_admin_referer('widgets-save-widget-order');
            $sidebars_widgets = array();
            foreach ( $registered_sidebars as $index => $sidebar ) {
                $postindex = $index . 'order';
                parse_str($_POST[$postindex], $order);
                $new_order = $order[$index];
                if ( is_array($new_order) )
                    foreach ( $new_order as $_id )
                        foreach ( $registered_widgets as $id => $widget )
                            if ( $_id == $id )
                                $sidebars_widgets[$index][] = $id;
            }
            $sidebars_widgets['array_version'] = 2;
            $saved = update_option('sidebars_widgets', $sidebars_widgets) ? 'yes' : 'no';
            wp_redirect(get_option('siteurl')."/wp-admin/themes.php?page=$page&saved=$saved");
        }
        wp_enqueue_script( 'scriptaculous-dragdrop' );
        add_action('admin_head', 'sidebar_admin_head');
        do_action('sidebar_admin_setup');
    }
}

function sidebar_admin_head() {
    global $registered_widgets, $registered_sidebars, $registered_widget_controls;

    $width = 1 + 262 * ( count($registered_sidebars));
    $height = 35 * count($registered_widgets);
    ?>
    <style type="text/css">
    body {
        height: 100%;
    }
    #sbadmin #zones {
        width: <?php echo $width; ?>px;
        -moz-user-select: none;
        -khtml-user-select: none;
        user-select: none;
    }
    #sbreset {
        float: left;
        margin: 1px 0;
    }
    .dropzone {
        float: left;
        margin-right: 10px;
        padding: 5px;
        border: 1px solid #bbb;
        background-color: #f0f8ff;
    }
    .dropzone h3 {
        text-align: center;
        color: #333;
    }
    .dropzone ul {
        list-style-type: none;
        width: 240px;
        height: <?php echo $height; ?>px;
        float: left;
        margin: 0;
        padding: 0;
    }
    * .module, #lastmodule {
        width: 238px;
        padding: 0;
        margin: 5px 0;
        cursor: move;
        display: block;
        border: 1px solid #ccc;
        background-color: #fbfbfb;
        text-align: left;
        line-height: 25px;
    }
    * .handle, #lastmodule span {
        display: block;
        width: 216px;
        padding: 0 10px;
        border-top: 1px solid #f2f2f2;
        border-right: 1px solid #e8e8e8;
        border-bottom: 1px solid #e8e8e8;
        border-left: 1px solid #f2f2f2;
    }
    * .popper {
        margin: 0;
        display: inline;
        position: absolute;
        top: 3px;
        right: 3px;
        overflow: hidden;
        text-align: center;
        height: 16px;
        font-size: 18px;
        line-height: 14px;
        cursor: pointer;
        padding: 0 3px 1px;
        border-top: 4px solid #6da6d1;
        background: url( images/fade-butt.png ) -5px 0px;
    }
    * html .popper {
        padding: 1px 6px 0;
        font-size: 16px;
    }
    #sbadmin p.submit {
        padding-right: 10px;
        clear: left;
    }
    .placematt {
        position: absolute;
        cursor: default;
        margin: 10px 0 0;
        padding: 0;
        width: 238px;
        background-color: #ffe;
    }
    * html .placematt {
        margin-top: 5px;
    }
    .placematt h4 {
        text-align: center;
        margin-bottom: 5px;
    }
    .placematt span {
        padding: 0 10px 10px;
        text-align: justify;
    }
    #palettediv {
        border: 1px solid #bbb;
        background-color: #f0f8ff;
        height: 180px;
        margin-top: 10px;
    }
    #palettediv h3 {
        text-align: center;
        color: #333;
    }
    #palettediv ul {
        padding: 0 0 0 10px;
    }
    #palettediv .module, #lastmodule {
        margin-right: 10px;
        float: left;
        width: 120px;
    }
    #palettediv .handle, #lastmodule span {
        height: 40px;
        font-size: 0.9em;
        line-height: 1.6em;
        width: 110px;
        padding: 0 5px;
    }
    #palettediv .popper {
        visibility: hidden;
    }
    #lastmodule {
        visibility: hidden;
    }
    * html #palettediv ul {
        margin: 0;
        padding: 0 0 0 10px;
    }
    * html #palettediv .module {
        float: none;
        display: inline;
    }
    #controls {
        height: 0px;
    }
    .control {
        position: absolute;
        display: block;
        background: #f9fcfe;
        padding: 0;
    }
    .controlhandle {
        cursor: move;
        background-color: #6da6d1;
        border-bottom: 2px solid #448abd;
        color: #333;
        display: block;
        margin: 0 0 5px;
        padding: 4px;
        font-size: 120%;
    }
    .controlcloser {
        cursor: pointer;
        font-size: 120%;
        display: block;
        position: absolute;
        top: 2px;
        right: 8px;
        padding: 0 3px;
        font-weight: bold;
    }
    .controlform {
        margin: 20px 30px;
    }
    .controlform p {
        text-align: center;
    }
    .control .checkbox {
        border: none;
        background: transparent;
    }
    .hidden {
        display: none;
    }
    #shadow {
        background: black;
        display: none;
        position: absolute;
        top: 0px;
        left: 0px;
        width: 100%;
    }
    </style>

    <script type="text/javascript">
        // <![CDATA[
        var cols = [<?php $a = array(); foreach ( $registered_sidebars as $index => $sidebar ) $a[] = "'$index'"; echo implode(', ', $a); ?>];
        var widgets = [<?php $a = array(); foreach ( $registered_widgets as $name => $widget ) $a[] = "'{$widget['id']}'"; echo implode(', ', $a); ?>];
        var controldims = new Array;
<?php foreach ( $registered_widget_controls as $id => $widget ) : ?>
            controldims['<?php echo $id; ?>control'] = new Array;
            controldims['<?php echo $id; ?>control']['width'] = <?php echo (int) $widget['width']; ?>;
            controldims['<?php echo $id; ?>control']['height'] = <?php echo (int) $widget['height']; ?>;
<?php endforeach; ?>
        function initWidgets() {
<?php foreach ( $registered_widget_controls as $name => $widget ) : ?>
            $('<?php echo $widget['id']; ?>popper').onclick = function() {popControl('<?php echo $widget['id']; ?>control');};
            $('<?php echo $widget['id']; ?>closer').onclick = function() {unpopControl('<?php echo $widget['id']; ?>control');};
            new Draggable('<?php echo $widget['id']; ?>control', {revert:false,handle:'controlhandle',starteffect:function(){},endeffect:function(){},change:function(o){dragChange(o);}});
            if ( true && window.opera )
                $('<?php echo $widget['id']; ?>control').style.border = '1px solid #bbb';
<?php endforeach; ?>
            if ( true && window.opera )
                $('shadow').style.background = 'transparent';
            new Effect.Opacity('shadow', {to:0.0});
            widgets.map(function(o) {o='widgetprefix-'+o; Position.absolutize(o); Position.relativize(o);} );
            $A(Draggables.drags).map(function(o) {o.startDrag(null); o.finishDrag(null);});
            for ( var n in Draggables.drags ) {
                if ( Draggables.drags[n].element.id == 'lastmodule' ) {
                    Draggables.drags[n].destroy();
                    break;
                }
            }
            resetPaletteHeight();
        }
        function resetDroppableHeights() {
            var max = 6;
            cols.map(function(o) {var c = $(o).childNodes.length; if ( c > max ) max = c;} );
            var height = 35 * ( max + 1);
            cols.map(function(o) {h = (($(o).childNodes.length + 1) * 35); $(o).style.height = (h > 280 ? h : 280) + 'px';} );
        }
        function resetPaletteHeight() {
            var p = $('palette'), pd = $('palettediv'), last = $('lastmodule');
            p.appendChild(last);
            if ( Draggables.activeDraggable && last.id == Draggables.activeDraggable.element.id )
                last = last.previousSibling;
            var y1 = Position.cumulativeOffset(last)[1] + last.offsetHeight;
            var y2 = Position.cumulativeOffset(pd)[1] + pd.offsetHeight;
            var dy = y1 - y2;
            pd.style.height = (pd.offsetHeight + dy + 9) + "px";
        }
        function maxHeight(elm) {
            htmlheight = document.body.parentNode.clientHeight;
            bodyheight = document.body.clientHeight;
            var height = htmlheight > bodyheight ? htmlheight : bodyheight;
            $(elm).style.height = height + 'px';
        }
        function dragChange(o) {
            el = o.element ? o.element : $(o);
            var p = Position.page(el);
            var right = p[0];
            var top = p[1];
            var left = $('shadow').offsetWidth - (el.offsetWidth + left);
            var bottom = $('shadow').offsetHeight - (el.offsetHeight + top);
            if ( right < 1 ) el.style.left = 0;
            if ( top < 1 ) el.style.top = 0;
            if ( left < 1 ) el.style.left = (left + right) + 'px';
            if ( bottom < 1 ) el.style.top = (top + bottom) + 'px';
        }
        function popControl(elm) {
            el = $(elm);
            el.style.width = controldims[elm]['width'] + 'px';
            el.style.height = controldims[elm]['height'] + 'px';
            var x = ( document.body.clientWidth - controldims[elm]['width'] ) / 2;
            var y = ( document.body.parentNode.clientHeight - controldims[elm]['height'] ) / 2;
            el.style.position = 'absolute';
            el.style.right = '' + x + 'px';
            el.style.top = '' + y + 'px';
            el.style.zIndex = 1000;
            el.className='control';
            $('shadow').onclick = function() {unpopControl(elm);};
            window.onresize = function(){maxHeight('shadow');dragChange(elm);};
            popShadow();
        }
        function popShadow() {
            maxHeight('shadow');
            var shadow = $('shadow');
            shadow.style.zIndex = 999;
            shadow.style.display = 'block';
            new Effect.Opacity('shadow', {duration:0.5, from:0.0, to:0.2});
        }
        function unpopShadow() {
            new Effect.Opacity('shadow', {to:0.0});
            $('shadow').style.display = 'none';
        }
        function unpopControl(el) {
            $(el).className='hidden';
            unpopShadow();
        }
        function serializeAll() {
<?php foreach ( $registered_sidebars as $index => $sidebar ) : ?>
            $('<?php echo $index; ?>order').value = Sortable.serialize('<?php echo $index; ?>');
<?php endforeach; ?>
        }
        function updateAll() {
            resetDroppableHeights();
            resetPaletteHeight();
            cols.map(function(o){
                var pm = $(o+'placematt');
                if ( $(o).childNodes.length == 0 ) {
                    pm.style.display = 'block';
                    Position.absolutize(o+'placematt');
                } else {
                    pm.style.display = 'none';
                }
            });
        }
        function noSelection(event) {
            if ( document.selection ) {
                var range = document.selection.createRange();
                range.collapse(false);
                range.select();
                return false;
            }
        }
        addLoadEvent(updateAll);
        addLoadEvent(initWidgets);
        Event.observe(window, 'resize', resetPaletteHeight);
        // ]]>
    </script>
    <?php
    do_action('sidebar_admin_head');
}

function sidebar_admin_page() {
    global $registered_widgets, $registered_sidebars, $registered_widget_controls;

    if ( count($registered_sidebars) < 1 ) {
?>
    <div class="wrap">
    <h2><?php _e('About Dynamic Sidebars'); ?></h2>
    <p><?php _e("You can modify your theme's sidebar, rearranging and configuring widgets right in this screen! Well, you could if you had a compatible theme. You're seeing this message because your theme isn't ready for widgets. <a href='http://automattic.com/code/widgets/'>Get it ready!</a>"); ?></p>
    
    </div>
<?php
        return;
    }
    $sidebars_widgets = get_sidebars_widgets();
    if ( empty($sidebars_widgets) ) {
        $sidebars_widgets = get_widget_defaults();
    }

    ksort($registered_widgets);

    $inactive_widgets = array();
    foreach ( $registered_widgets as $id => $widget ) {
        $is_active = false;
        foreach ( $registered_sidebars as $index => $sidebar ) {
            if ( is_array($sidebars_widgets[$index]) && in_array($id, $sidebars_widgets[$index]) ) {
                $is_active = true;
                break;
            }
        }
        if ( ! $is_active )
            $inactive_widgets[] = $id;
    }

    $containers = array('palette');
    foreach ( $registered_sidebars as $index => $sidebar )
        $containers[] = $index;
    $c_string = '';
    foreach ( $containers as $container )
        $c_string .= "\"$container\",";
    $c_string = substr($c_string, 0, -1);
    ?>
    <?php if ( $_GET['saved'] ) { ?>
    <div class="fade updated" id="message">
    <p><?php printf(__('Sidebar Updated. <a href="%s">View site &raquo;</a>', 'widgets'), get_option('home') . '/'); ?></p>
    </div>
    <?php } ?>
    <div class="wrap">
    <h2><?php _e('Sidebar Arrangement'); ?></h2>
&