html.php

<?php
/**
 * HTML output functions
 *
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Andreas Gohr <andi@splitbrain.org>
 */

if(!defined('DOKU_INC')) die('meh.');
if(!defined('NL')) define('NL',"\n");
require_once(DOKU_INC.'inc/parserutils.php');
require_once(DOKU_INC.'inc/form.php');

/**
 * Convenience function to quickly build a wikilink
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_wikilink($id,$name=null,$search=''){
    static $xhtml_renderer = null;
    if(is_null($xhtml_renderer)){
        $xhtml_renderer = p_get_renderer('xhtml');
    }

    return $xhtml_renderer->internallink($id,$name,$search,true,'navigation');
}

/**
 * Helps building long attribute lists
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_attbuild($attributes){
    $ret = '';
    foreach ( $attributes as $key => $value ) {
        $ret .= $key.'="'.formText($value).'" ';
    }
    return trim($ret);
}

/**
 * The loginform
 *
 * @author   Andreas Gohr <andi@splitbrain.org>
 */
function html_login(){
    global $lang;
    global $conf;
    global $ID;
    global $auth;

    print p_locale_xhtml('login');
    print '<div class="centeralign">'.NL;
    $form = new Doku_Form(array('id' => 'dw__login'));
    $form->startFieldset($lang['btn_login']);
    $form->addHidden('id', $ID);
    $form->addHidden('do', 'login');
    $form->addElement(form_makeTextField('u', ((!$_REQUEST['http_credentials']) ? $_REQUEST['u'] : ''), $lang['user'], 'focus__this', 'block'));
    $form->addElement(form_makePasswordField('p', $lang['pass'], '', 'block'));
    if($conf['rememberme']) {
        $form->addElement(form_makeCheckboxField('r', '1', $lang['remember'], 'remember__me', 'simple'));
    }
    $form->addElement(form_makeButton('submit', '', $lang['btn_login']));
    $form->endFieldset();

    if($auth && $auth->canDo('addUser') && actionOK('register')){
        $form->addElement('<p>'
                          . $lang['reghere']
                          . ': <a href="'.wl($ID,'do=register').'" rel="nofollow" class="wikilink1">'.$lang['register'].'</a>'
                          . '</p>');
    }

    if ($auth && $auth->canDo('modPass') && actionOK('resendpwd')) {
        $form->addElement('<p>'
                          . $lang['pwdforget']
                          . ': <a href="'.wl($ID,'do=resendpwd').'" rel="nofollow" class="wikilink1">'.$lang['btn_resendpwd'].'</a>'
                          . '</p>');
    }

    html_form('login', $form);
    print '</div>'.NL;
}

/**
 * inserts section edit buttons if wanted or removes the markers
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_secedit($text,$show=true){
    global $INFO;

    $regexp = '#<!-- EDIT(\d+) ([A-Z]+) (?:"([^"]*)" )?\[(\d+-\d*)\] -->#';

    if(!$INFO['writable'] || !$show || $INFO['rev']){
        return preg_replace($regexp,'',$text);
    }

    return preg_replace_callback($regexp,
                'html_secedit_button', $text);
}

/**
 * prepares section edit button data for event triggering
 * used as a callback in html_secedit
 *
 * @triggers HTML_SECEDIT_BUTTON
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_secedit_button($matches){
    $data = array('id'     => $matches[1],
                  'target' => strtolower($matches[2]),
                  'range'  => $matches[count($matches) - 1]);
    if (count($matches) === 5) {
        $data['name'] = $matches[3];
    }

    return trigger_event('HTML_SECEDIT_BUTTON', $data,
                         'html_secedit_get_button');
}

/**
 * prints a section editing button
 * used as default action form HTML_SECEDIT_BUTTON
 *
 * @author Adrian Lang <lang@cosmocode.de>
 */
function html_secedit_get_button($data) {
    global $ID;
    global $INFO;

    if (!isset($data['name']) || $data['name'] === '') return;

    $name = $data['name'];
    unset($data['name']);

    return "<div class='secedit editbutton_" . $data['target'] .
                       " editbutton_" . $data['id'] . "'>" .
           html_btn('secedit', $ID, '',
                    array_merge(array('do'  => 'edit',
                                      'rev' => $INFO['lastmod']), $data),
                    'post', $name) . '</div>';
}

/**
 * Just the back to top button (in its own form)
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_topbtn(){
    global $lang;

    $ret  = '';
    $ret  = '<a class="nolink" href="#dokuwiki__top"><input type="button" class="button" value="'.$lang['btn_top'].'" onclick="window.scrollTo(0, 0)" title="'.$lang['btn_top'].'" /></a>';

    return $ret;
}

/**
 * Displays a button (using its own form)
 * If tooltip exists, the access key tooltip is replaced.
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_btn($name,$id,$akey,$params,$method='get',$tooltip=''){
    global $conf;
    global $lang;

    $label = $lang['btn_'.$name];

    $ret = '';
    $tip = '';

    //filter id (without urlencoding)
    $id = idfilter($id,false);

    //make nice URLs even for buttons
    if($conf['userewrite'] == 2){
        $script = DOKU_BASE.DOKU_SCRIPT.'/'.$id;
    }elseif($conf['userewrite']){
        $script = DOKU_BASE.$id;
    }else{
        $script = DOKU_BASE.DOKU_SCRIPT;
        $params['id'] = $id;
    }

    $ret .= '<form class="button btn_'.$name.'" method="'.$method.'" action="'.$script.'"><div class="no">';

    if(is_array($params)){
        reset($params);
        while (list($key, $val) = each($params)) {
            $ret .= '<input type="hidden" name="'.$key.'" ';
            $ret .= 'value="'.htmlspecialchars($val).'" />';
        }
    }

    if ($tooltip!='') {
        $tip = htmlspecialchars($tooltip);
    }else{
        $tip = htmlspecialchars($label);
    }

    $ret .= '<input type="submit" value="'.hsc($label).'" class="button" ';
    if($akey){
        $tip .= ' ['.strtoupper($akey).']';
        $ret .= 'accesskey="'.$akey.'" ';
    }
    $ret .= 'title="'.$tip.'" ';
    $ret .= '/>';
    $ret .= '</div></form>';

    return $ret;
}

/**
 * show a wiki page
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_show($txt=''){
    global $ID;
    global $REV;
    global $HIGH;
    global $INFO;
    //disable section editing for old revisions or in preview
    if($txt || $REV){
        $secedit = false;
    }else{
        $secedit = true;
    }

    if ($txt){
        //PreviewHeader
        echo '<br id="scroll__here" />';
        echo p_locale_xhtml('preview');
        echo '<div class="preview">';
        $html = html_secedit(p_render('xhtml',p_get_instructions($txt),$info),$secedit);
        if($INFO['prependTOC']) $html = tpl_toc(true).$html;
        echo $html;
        echo '<div class="clearer"></div>';
        echo '</div>';

    }else{
        if ($REV) print p_locale_xhtml('showrev');
        $html = p_wiki_xhtml($ID,$REV,true);
        $html = html_secedit($html,$secedit);
        if($INFO['prependTOC']) $html = tpl_toc(true).$html;
        $html = html_hilight($html,$HIGH);
        echo $html;
    }
}

/**
 * ask the user about how to handle an exisiting draft
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_draft(){
    global $INFO;
    global $ID;
    global $lang;
    global $conf;
    $draft = unserialize(io_readFile($INFO['draft'],false));
    $text  = cleanText(con($draft['prefix'],$draft['text'],$draft['suffix'],true));

    print p_locale_xhtml('draft');
    $form = new Doku_Form(array('id' => 'dw__editform'));
    $form->addHidden('id', $ID);
    $form->addHidden('date', $draft['date']);
    $form->addElement(form_makeWikiText($text, array('readonly'=>'readonly')));
    $form->addElement(form_makeOpenTag('div', array('id'=>'draft__status')));
    $form->addElement($lang['draftdate'].' '. dformat(filemtime($INFO['draft'])));
    $form->addElement(form_makeCloseTag('div'));
    $form->addElement(form_makeButton('submit', 'recover', $lang['btn_recover'], array('tabindex'=>'1')));
    $form->addElement(form_makeButton('submit', 'draftdel', $lang['btn_draftdel'], array('tabindex'=>'2')));
    $form->addElement(form_makeButton('submit', 'show', $lang['btn_cancel'], array('tabindex'=>'3')));
    html_form('draft', $form);
}

/**
 * Highlights searchqueries in HTML code
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 * @author Harry Fuecks <hfuecks@gmail.com>
 */
function html_hilight($html,$phrases){
    $phrases = array_filter((array) $phrases);
    $regex = join('|',array_map('preg_quote_cb',$phrases));

    if ($regex === '') return $html;
    $html = preg_replace_callback("/((<[^>]*)|$regex)/ui",'html_hilight_callback',$html);
    return $html;
}

/**
 * Callback used by html_hilight()
 *
 * @author Harry Fuecks <hfuecks@gmail.com>
 */
function html_hilight_callback($m) {
    $hlight = unslash($m[0]);
    if ( !isset($m[2])) {
        $hlight = '<span class="search_hit">'.$hlight.'</span>';
    }
    return $hlight;
}

/**
 * Run a search and display the result
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_search(){
    require_once(DOKU_INC.'inc/search.php');
    require_once(DOKU_INC.'inc/fulltext.php');
    global $conf;
    global $QUERY;
    global $ID;
    global $lang;

    print p_locale_xhtml('searchpage');
    flush();

    //check if search is restricted to namespace
    if(preg_match('/@([^@]*)/',$QUERY,$match)) {
        $id = cleanID($match[1]);
    } else {
        $id = cleanID($QUERY);
    }

    //show progressbar
    print '<div class="centeralign" id="dw__loading">'.NL;
    print '<script type="text/javascript" charset="utf-8"><!--//--><![CDATA[//><!--'.NL;
    print 'showLoadBar();'.NL;
    print '//--><!]]></script>'.NL;
    print '<br /></div>'.NL;
    flush();

    //do quick pagesearch
    $data = array();

    if($id) $data = ft_pageLookup($id);
    if(count($data)){
        print '<div class="search_quickresult">';
        print '<h3>'.$lang['quickhits'].':</h3>';
        print '<ul class="search_quickhits">';
        foreach($data as $id){
            print '<li> ';
            $ns = getNS($id);
            if($ns){
                $name = shorten(noNS($id), ' ('.$ns.')',30);
            }else{
                $name = $id;
            }
            print html_wikilink(':'.$id,$name);
            print '</li> ';
        }
        print '</ul> ';
        //clear float (see http://www.complexspiral.com/publications/containing-floats/)
        print '<div class="clearer">&nbsp;</div>';
        print '</div>';
    }
    flush();

    //do fulltext search
    $data = ft_pageSearch($QUERY,$regex);
    if(count($data)){
        $num = 1;
        foreach($data as $id => $cnt){
            print '<div class="search_result">';
            print html_wikilink(':'.$id,useHeading('navigation')?null:$id,$regex);
            if($cnt !== 0){
                print ': <span class="search_cnt">'.$cnt.' '.$lang['hits'].'</span><br />';
                if($num < 15){ // create snippets for the first number of matches only #FIXME add to conf ?
                    print '<div class="search_snippet">'.ft_snippet($id,$regex).'</div>';
                }
                $num++;
            }
            print '</div>';
            flush();
        }
    }else{
        print '<div class="nothing">'.$lang['nothingfound'].'</div>';
    }

    //hide progressbar
    print '<script type="text/javascript" charset="utf-8"><!--//--><![CDATA[//><!--'.NL;
    print 'hideLoadBar("dw__loading");'.NL;
    print '//--><!]]></script>'.NL;
    flush();
}

/**
 * Display error on locked pages
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_locked(){
    global $ID;
    global $conf;
    global $lang;
    global $INFO;

    $locktime = filemtime(wikiLockFN($ID));
    $expire = dformat($locktime + $conf['locktime']);
    $min    = round(($conf['locktime'] - (time() - $locktime) )/60);

    print p_locale_xhtml('locked');
    print '<ul>';
    print '<li><div class="li"><strong>'.$lang['lockedby'].':</strong> '.editorinfo($INFO['locked']).'</div></li>';
    print '<li><div class="li"><strong>'.$lang['lockexpire'].':</strong> '.$expire.' ('.$min.' min)</div></li>';
    print '</ul>';
}

/**
 * list old revisions
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 * @author Ben Coburn <btcoburn@silicodon.net>
 */
function html_revisions($first=0){
    global $ID;
    global $INFO;
    global $conf;
    global $lang;
    /* we need to get one additionally log entry to be able to
     * decide if this is the last page or is there another one.
     * see html_recent()
     */
    $revisions = getRevisions($ID, $first, $conf['recent']+1);
    if(count($revisions)==0 && $first!=0){
        $first=0;
        $revisions = getRevisions($ID, $first, $conf['recent']+1);;
    }
    $hasNext = false;
    if (count($revisions)>$conf['recent']) {
        $hasNext = true;
        array_pop($revisions); // remove extra log entry
    }

    $date = dformat($INFO['lastmod']);

    print p_locale_xhtml('revisions');

    $form = new Doku_Form(array('id' => 'page__revisions'));
    $form->addElement(form_makeOpenTag('ul'));
    if($INFO['exists'] && $first==0){
        if (isset($INFO['meta']) && isset($INFO['meta']['last_change']) && $INFO['meta']['last_change']['type']===DOKU_CHANGE_TYPE_MINOR_EDIT)
            $form->addElement(form_makeOpenTag('li', array('class' => 'minor')));
        else
            $form->addElement(form_makeOpenTag('li'));
        $form->addElement(form_makeOpenTag('div', array('class' => 'li')));
        $form->addElement(form_makeTag('input', array(
                        'type' => 'checkbox',
                        'name' => 'rev2[]',
                        'value' => 'current')));

        $form->addElement(form_makeOpenTag('span', array('class' => 'date')));
        $form->addElement($date);
        $form->addElement(form_makeCloseTag('span'));

        $form->addElement(form_makeTag('img', array(
                        'src' =>  DOKU_BASE.'lib/images/blank.gif',
                        'width' => '15',
                        'height' => '11',
                        'alt'    => '')));

        $form->addElement(form_makeOpenTag('a', array(
                        'class' => 'wikilink1',
                        'href'  => wl($ID))));
        $form->addElement($ID);
        $form->addElement(form_makeCloseTag('a'));

        $form->addElement(form_makeOpenTag('span', array('class' => 'sum')));
        $form->addElement(' &ndash; ');
        $form->addElement(htmlspecialchars($INFO['sum']));
        $form->addElement(form_makeCloseTag('span'));

        $form->addElement(form_makeOpenTag('span', array('class' => 'user')));
        $form->addElement((empty($INFO['editor']))?('('.$lang['external_edit'].')'):editorinfo($INFO['editor']));
        $form->addElement(form_makeCloseTag('span'));

        $form->addElement('('.$lang['current'].')');
        $form->addElement(form_makeCloseTag('div'));
        $form->addElement(form_makeCloseTag('li'));
    }

    foreach($revisions as $rev){
        $date   = dformat($rev);
        $info   = getRevisionInfo($ID,$rev,true);
        $exists = page_exists($ID,$rev);

        if ($info['type']===DOKU_CHANGE_TYPE_MINOR_EDIT)
            $form->addElement(form_makeOpenTag('li', array('class' => 'minor')));
        else
            $form->addElement(form_makeOpenTag('li'));
        $form->addElement(form_makeOpenTag('div', array('class' => 'li')));
        if($exists){
            $form->addElement(form_makeTag('input', array(
                            'type' => 'checkbox',
                            'name' => 'rev2[]',
                            'value' => $rev)));
        }else{
            $form->addElement(form_makeTag('img', array(
                            'src' => DOKU_BASE.'lib/images/blank.gif',
                            'width' => 14,
                            'height' => 11,
                            'alt' => '')));
        }

        $form->addElement(form_makeOpenTag('span', array('class' => 'date')));
        $form->addElement($date);
        $form->addElement(form_makeCloseTag('span'));

        if($exists){
            $form->addElement(form_makeOpenTag('a', array('href' => wl($ID,"rev=$rev,do=diff", false, '&'), 'class' => 'diff_link')));
            $form->addElement(form_makeTag('img', array(
                            'src'    => DOKU_BASE.'lib/images/diff.png',
                            'width'  => 15,
                            'height' => 11,
                            'title'  => $lang['diff'],
                            'alt'    => $lang['diff'])));
            $form->addElement(form_makeCloseTag('a'));

            $form->addElement(form_makeOpenTag('a', array('href' => wl($ID,"rev=$rev",false,'&'), 'class' => 'wikilink1')));
            $form->addElement($ID);
            $form->addElement(form_makeCloseTag('a'));
        }else{
            $form->addElement(form_makeTag('img', array(
                            'src' => DOKU_BASE.'lib/images/blank.gif',
                            'width' => '15',
                            'height' => '11',
                            'alt'   => '')));
            $form->addElement($ID);
        }

        $form->addElement(form_makeOpenTag('span', array('class' => 'sum')));
        $form->addElement(' &ndash; ');
        $form->addElement(htmlspecialchars($info['sum']));
        $form->addElement(form_makeCloseTag('span'));

        $form->addElement(form_makeOpenTag('span', array('class' => 'user')));
        if($info['user']){
            $form->addElement(editorinfo($info['user']));
            if(auth_ismanager()){
                $form->addElement(' ('.$info['ip'].')');
            }
        }else{
            $form->addElement($info['ip']);
        }
        $form->addElement(form_makeCloseTag('span'));

        $form->addElement(form_makeCloseTag('div'));
        $form->addElement(form_makeCloseTag('li'));
    }
    $form->addElement(form_makeCloseTag('ul'));
    $form->addElement(form_makeButton('submit', 'diff', $lang['diff2']));
    html_form('revisions', $form);

    print '<div class="pagenav">';
    $last = $first + $conf['recent'];
    if ($first > 0) {
        $first -= $conf['recent'];
        if ($first < 0) $first = 0;
        print '<div class="pagenav-prev">';
        print html_btn('newer',$ID,"p",array('do' => 'revisions', 'first' => $first));
        print '</div>';
    }
    if ($hasNext) {
        print '<div class="pagenav-next">';
        print html_btn('older',$ID,"n",array('do' => 'revisions', 'first' => $last));
        print '</div>';
    }
    print '</div>';

}

/**
 * display recent changes
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 * @author Matthias Grimm <matthiasgrimm@users.sourceforge.net>
 * @author Ben Coburn <btcoburn@silicodon.net>
 */
function html_recent($first=0){
    global $conf;
    global $lang;
    global $ID;
    /* we need to get one additionally log entry to be able to
     * decide if this is the last page or is there another one.
     * This is the cheapest solution to get this information.
     */
    $recents = getRecents($first,$conf['recent'] + 1,getNS($ID));
    if(count($recents) == 0 && $first != 0){
        $first=0;
        $recents = getRecents($first,$conf['recent'] + 1,getNS($ID));
    }
    $hasNext = false;
    if (count($recents)>$conf['recent']) {
        $hasNext = true;
        array_pop($recents); // remove extra log entry
    }

    print p_locale_xhtml('recent');

    if (getNS($ID) != '')
        print '<div class="level1"><p>' . sprintf($lang['recent_global'], getNS($ID), wl('', 'do=recent')) . '</p></div>';

    $form = new Doku_Form(array('id' => 'dw__recent', 'method' => 'GET'));
    $form->addHidden('sectok', null);
    $form->addHidden('do', 'recent');
    $form->addHidden('id', $ID);
    $form->addElement(form_makeOpenTag('ul'));

    foreach($recents as $recent){
        $date = dformat($recent['date']);
        if ($recent['type']===DOKU_CHANGE_TYPE_MINOR_EDIT)
            $form->addElement(form_makeOpenTag('li', array('class' => 'minor')));
        else
            $form->addElement(form_makeOpenTag('li'));

        $form->addElement(form_makeOpenTag('div', array('class' => 'li')));

        $form->addElement(form_makeOpenTag('span', array('class' => 'date')));
        $form->addElement($date);
        $form->addElement(form_makeCloseTag('span'));

        $form->addElement(form_makeOpenTag('a', array('class' => 'diff_link', 'href' => wl($recent['id'],"do=diff", false, '&'))));
        $form->addElement(form_makeTag('img', array(
                        'src'   => DOKU_BASE.'lib/images/diff.png',
                        'width' => 15,
                        'height'=> 11,
                        'title' => $lang['diff'],
                        'alt'   => $lang['diff']
                        )));
        $form->addElement(form_makeCloseTag('a'));

        $form->addElement(form_makeOpenTag('a', array('class' => 'revisions_link', 'href' => wl($recent['id'],"do=revisions",false,'&'))));
        $form->addElement(form_makeTag('img', array(
                        'src'   => DOKU_BASE.'lib/images/history.png',
                        'width' => 12,
                        'height'=> 14,
                        'title' => $lang['btn_revs'],
                        'alt'   => $lang['btn_revs']
                        )));
        $form->addElement(form_makeCloseTag('a'));

        $form->addElement(html_wikilink(':'.$recent['id'],useHeading('navigation')?null:$recent['id']));

        $form->addElement(form_makeOpenTag('span', array('class' => 'sum')));
        $form->addElement(' &ndash; '.htmlspecialchars($recent['sum']));
        $form->addElement(form_makeCloseTag('span'));

        $form->addElement(form_makeOpenTag('span', array('class' => 'user')));
        if($recent['user']){
            $form->addElement(editorinfo($recent['user']));
            if(auth_ismanager()){
                $form->addElement(' ('.$recent['ip'].')');
            }
        }else{
            $form->addElement($recent['ip']);
        }
        $form->addElement(form_makeCloseTag('span'));

        $form->addElement(form_makeCloseTag('div'));
        $form->addElement(form_makeCloseTag('li'));
    }
    $form->addElement(form_makeCloseTag('ul'));

    $form->addElement(form_makeOpenTag('div', array('class' => 'pagenav')));
    $last = $first + $conf['recent'];
    if ($first > 0) {
        $first -= $conf['recent'];
        if ($first < 0) $first = 0;
        $form->addElement(form_makeOpenTag('div', array('class' => 'pagenav-prev')));
        $form->addElement(form_makeTag('input', array(
                    'type'  => 'submit',
                    'name'  => 'first['.$first.']',
                    'value' => $lang['btn_newer'],
                    'accesskey' => 'n',
                    'title' => $lang['btn_newer'].' [N]',
                    'class' => 'button'
                    )));
        $form->addElement(form_makeCloseTag('div'));
    }
    if ($hasNext) {
        $form->addElement(form_makeOpenTag('div', array('class' => 'pagenav-next')));
        $form->addElement(form_makeTag('input', array(
                        'type'  => 'submit',
                        'name'  => 'first['.$last.']',
                        'value' => $lang['btn_older'],
                        'accesskey' => 'p',
                        'title' => $lang['btn_older'].' [P]',
                        'class' => 'button'
                        )));
        $form->addElement(form_makeCloseTag('div'));
    }
    $form->addElement(form_makeCloseTag('div'));
    html_form('recent', $form);
}

/**
 * Display page index
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_index($ns){
    require_once(DOKU_INC.'inc/search.php');
    global $conf;
    global $ID;
    $dir = $conf['datadir'];
    $ns  = cleanID($ns);
    #fixme use appropriate function
    if(empty($ns)){
        $ns = dirname(str_replace(':','/',$ID));
        if($ns == '.') $ns ='';
    }
    $ns  = utf8_encodeFN(str_replace(':','/',$ns));

    echo p_locale_xhtml('index');
    echo '<div id="index__tree">';

    $data = array();
    search($data,$conf['datadir'],'search_index',array('ns' => $ns));
    echo html_buildlist($data,'idx','html_list_index','html_li_index');

    echo '</div>';
}

/**
 * Index item formatter
 *
 * User function for html_buildlist()
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_list_index($item){
    global $ID;
    $ret = '';
    $base = ':'.$item['id'];
    $base = substr($base,strrpos($base,':')+1);
    if($item['type']=='d'){
        $ret .= '<a href="'.wl($ID,'idx='.rawurlencode($item['id'])).'" class="idx_dir"><strong>';
        $ret .= $base;
        $ret .= '</strong></a>';
    }else{
        $ret .= html_wikilink(':'.$item['id']);
    }
    return $ret;
}

/**
 * Index List item
 *
 * This user function is used in html_build_lidt to build the
 * <li> tags for namespaces when displaying the page index
 * it gives different classes to opened or closed "folders"
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_li_index($item){
    if($item['type'] == "f"){
        return '<li class="level'.$item['level'].'">';
    }elseif($item['open']){
        return '<li class="open">';
    }else{
        return '<li class="closed">';
    }
}

/**
 * Default List item
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_li_default($item){
    return '<li class="level'.$item['level'].'">';
}

/**
 * Build an unordered list
 *
 * Build an unordered list from the given $data array
 * Each item in the array has to have a 'level' property
 * the item itself gets printed by the given $func user
 * function. The second and optional function is used to
 * print the <li> tag. Both user function need to accept
 * a single item.
 *
 * Both user functions can be given as array to point to
 * a member of an object.
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_buildlist($data,$class,$func,$lifunc='html_li_default'){
    $level = 0;
    $opens = 0;
    $ret   = '';

    foreach ($data as $item){

        if( $item['level'] > $level ){
            //open new list
            for($i=0; $i<($item['level'] - $level); $i++){
                if ($i) $ret .= "<li class=\"clear\">\n";
                $ret .= "\n<ul class=\"$class\">\n";
            }
        }elseif( $item['level'] < $level ){
            //close last item
            $ret .= "</li>\n";
            for ($i=0; $i<($level - $item['level']); $i++){
                //close higher lists
                $ret .= "</ul>\n</li>\n";
            }
        }else{
            //close last item
            $ret .= "</li>\n";
        }

        //remember current level
        $level = $item['level'];

        //print item
        $ret .= call_user_func($lifunc,$item);
        $ret .= '<div class="li">';

        $ret .= call_user_func($func,$item);
        $ret .= '</div>';
    }

    //close remaining items and lists
    for ($i=0; $i < $level; $i++){
        $ret .= "</li></ul>\n";
    }

    return $ret;
}

/**
 * display backlinks
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 * @author Michael Klier <chi@chimeric.de>
 */
function html_backlinks(){
    require_once(DOKU_INC.'inc/fulltext.php');
    global $ID;
    global $conf;
    global $lang;

    print p_locale_xhtml('backlinks');

    $data = ft_backlinks($ID);

    if(!empty($data)) {
        print '<ul class="idx">';
        foreach($data as $blink){
            print '<li><div class="li">';
            print html_wikilink(':'.$blink,useHeading('navigation')?null:$blink);
            print '</div></li>';
        }
        print '</ul>';
    } else {
        print '<div class="level1"><p>' . $lang['nothingfound'] . '</p></div>';
    }
}

/**
 * show diff
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function html_diff($text='',$intro=true){
    require_once(DOKU_INC.'inc/DifferenceEngine.php');
    global $ID;
    global $REV;
    global $lang;
    global $conf;

    // we're trying to be clever here, revisions to compare can be either
    // given as rev and rev2 parameters, with rev2 being optional. Or in an
    // array in rev2.
    $rev1 = $REV;

    if(is_array($_REQUEST['rev2'])){
        $rev1 = (int) $_REQUEST['rev2'][0];
        $rev2 = (int) $_REQUEST['rev2'][1];

        if(!$rev1){
            $rev1 = $rev2;
            unset($rev2);
        }
    }else{
        $rev2 = (int) $_REQUEST['rev2'];
    }

    if($text){                      // compare text to the most current revision
        $l_rev   = '';
        $l_text  = rawWiki($ID,'');
        $l_head  = '<a class="wikilink1" href="'.wl($ID).'">'.
            $ID.' '.dformat((int) @filemtime(wikiFN($ID))).'</a> '.
            $lang['current'];

        $r_rev   = '';
        $r_text  = cleanText($text);
        $r_head  = $lang['yours'];
    }else{
        if($rev1 && $rev2){            // two specific revisions wanted
            // make sure order is correct (older on the left)
            if($rev1 < $rev2){
                $l_rev = $rev1;
                $r_rev = $rev2;
            }else{
                $l_rev = $rev2;
                $r_rev = $rev1;
            }
        }elseif($rev1){                // single revision given, compare to current
            $r_rev = '';
            $l_rev = $rev1;
        }else{                        // no revision was given, compare previous to current
            $r_rev = '';
            $revs = getRevisions($ID, 0, 1);
            $l_rev = $revs[0];
            $REV = $l_rev; // store revision back in $REV
        }

        // when both revisions are empty then the page was created just now
        if(!$l_rev && !$r_rev){
            $l_text = '';
        }else{
            $l_text = rawWiki($ID,$l_rev);
        }
        $r_text = rawWiki($ID,$r_rev);

        if(!$l_rev){
            $l_head = '&mdash;';
        }else{
            $l_info   = getRevisionInfo($ID,$l_rev,true);
            if($l_info['user']){
                $l_user = editorinfo($l_info['user']);
                if(auth_ismanager()) $l_user .= ' ('.$l_info['ip'].')';
            } else {
                $l_user = $l_info['ip'];
            }
            $l_user  = '<span class="user">'.$l_user.'</span>';
            $l_sum   = ($l_info['sum']) ? '<span class="sum">'.hsc($l_info['sum']).'</span>' : '';
            if ($l_info['type']===DOKU_CHANGE_TYPE_MINOR_EDIT) $l_minor = 'class="minor"';

            $l_head = '<a class="wikilink1" href="'.wl($ID,"rev=$l_rev").'">'.
            $ID.' ['.dformat($l_rev).']</a>'.
            '<br />'.$l_user.' '.$l_sum;
        }

        if($r_rev){
            $r_info   = getRevisionInfo($ID,$r_rev,true);
            if($r_info['user']){
                $r_user = editorinfo($r_info['user']);
                if(auth_ismanager()) $r_user .= ' ('.$r_info['ip'].')';
            } else {
                $r_user = $r_info['ip'];
            }
            $r_user = '<span class="user">'.$r_user.'</span>';
            $r_sum  = ($r_info['sum']) ? '<span class="sum">'.hsc($r_info['sum']).'</span>' : '';
            if ($r_info['type']===DOKU_CHANGE_TYPE_MINOR_EDIT) $r_minor = 'class="minor"';

            $r_head = '<a class="wikilink1" href="'.wl($ID,"rev=$r_rev").'">'.
            $ID.' ['.dformat($r_rev).']</a>'.
            '<br />'.$r_user.' '.$r_sum;
        }elseif($_rev = @filemtime(wikiFN($ID))){
            $_info   = getRevisionInfo($ID,$_rev,true);
            if($_info['user']){
                $_user = editorinfo($_info['user']);
                if(auth_ismanager()) $_user .= ' ('.$_info['ip'].')';
            } else {
                $_user = $_info['ip'];
            }
            $_user = '<span class="user">'.$_user.'</span>';
            $_sum  = ($_info['sum']) ? '<span class="sum">'.hsc($_info['sum']).'</span>' : '';
            if ($_info['type']===DOKU_CHANGE_TYPE_MINOR_EDIT) $r_minor = 'class="minor"';

            $r_head  = '<a class="wikilink1" href="'.wl($ID).'">'.
            $ID.' ['.dformat($_rev).']</a> '.
            '('.$lang['current'].')'.
            '<br />'.$_user.' '.$_sum;
        }else{
            $r_head = '&mdash; ('.$lang['current'].')';
        }
    }

    $df = new Diff(explode("\n",htmlspecialchars($l_text)),
        explode("\n",htmlspecialchars($r_text)));

    $tdf = new TableDiffFormatter();
    if($intro) print p_locale_xhtml('diff');
    ?>
    <table class="diff">
    <tr>
    <th colspan="2" <?php echo $l_minor?>>
    <?php echo $l_head?>
    </th>
    <th colspan="2" <?php echo $r_minor?>>