Add "attachments_bottom" hook to allow manipulating the attachments

[squirrelmail.git] / src / left_main.php

<?php

/**
 * left_main.php
 *
 * Copyright (c) 1999-2003 The SquirrelMail Project Team
 * Licensed under the GNU GPL. For full terms see the file COPYING.
 *
 * This is the code for the left bar. The left bar shows the folders
 * available, and has cookie information.
 *
 * $Id$
 */

/* Path for SquirrelMail required files. */
define('SM_PATH','../');

/* SquirrelMail required files. */
require_once(SM_PATH . 'include/validate.php');
require_once(SM_PATH . 'functions/imap.php');
require_once(SM_PATH . 'functions/plugin.php');
require_once(SM_PATH . 'functions/page_header.php');
require_once(SM_PATH . 'functions/html.php');
require_once(SM_PATH . 'functions/date.php');

/* These constants are used for folder stuff. */
define('SM_BOX_UNCOLLAPSED', 0);
define('SM_BOX_COLLAPSED',   1);

/* --------------------- FUNCTIONS ------------------------- */

function formatMailboxName($imapConnection, $box_array) {

    global $folder_prefix, $trash_folder, $sent_folder,
           $color, $move_to_sent, $move_to_trash,
           $unseen_notify, $unseen_type, $collapse_folders,
           $draft_folder, $save_as_draft,
           $use_special_folder_color;
    $real_box = $box_array['unformatted'];
    $mailbox = str_replace('&nbsp;','',$box_array['formatted']);
    $mailboxURL = urlencode($real_box);

    /* Strip down the mailbox name. */
    if (ereg("^( *)([^ ]*)$", $mailbox, $regs)) {
        $mailbox = $regs[2];
    }
    $unseen = 0;
    $status = array('','');
    if (($unseen_notify == 2 && $real_box == 'INBOX') ||
        $unseen_notify == 3) {
    $tmp_status = create_unseen_string($real_box, $box_array, $imapConnection, $unseen_type );
    if ($status !== false) {
        $status = $tmp_status;
    }
    }
    list($unseen_string, $unseen) = $status;
    $special_color = ($use_special_folder_color && isSpecialMailbox($real_box));

    /* Start off with a blank line. */
    $line = '';

    /* If there are unseen message, bold the line. */
    if ($unseen > 0) { $line .= '<B>'; }

    /* Create the link for this folder. */
    if ($status !== false) {
    $line .= '<a href="right_main.php?PG_SHOWALL=0&amp;sort=0&amp;startMessage=1&amp;mailbox='.
                $mailboxURL.'" TARGET="right" STYLE="text-decoration:none">';
    }
    if ($special_color) {
        $line .= "<font color=\"$color[11]\">";
    }
    if ( $mailbox == 'INBOX' ) {
        $line .= _("INBOX");
    } else {
        $line .= str_replace(' ','&nbsp;',$mailbox);
    }
    if ($special_color == TRUE)
        $line .= '</font>';
    if ($status !== false) {
    $line .= '</a>';
    }

    /* If there are unseen message, close bolding. */
    if ($unseen > 0) { $line .= "</B>"; }

    /* Print unseen information. */
    if ($unseen_string != '') {
        $line .= "&nbsp;<SMALL>$unseen_string</SMALL>";
    }

    /* If it's the trash folder, show a purge link when needed */
    if (($move_to_trash) && ($real_box == $trash_folder)) {
        if (! isset($numMessages)) {
            $numMessages = sqimap_get_num_messages($imapConnection, $real_box);
        }

        if (($numMessages > 0) or ($box_array['parent'] == 1)) {
            $urlMailbox = urlencode($real_box);
            $line .= "\n<small>\n" .
                    "&nbsp;&nbsp;(<A HREF=\"empty_trash.php\" style=\"text-decoration:none\">"._("purge")."</A>)" .
                    "</small>";
        } else {
	   $line .= concat_hook_function('left_main_after_each_folder',
	          array(isset($numMessages) ? $numMessages : '',$real_box,$imapConnection));
        }
    }

    /* Return the final product. */
    return ($line);
}

/**
 * Recursive function that computes the collapsed status and parent
 * (or not parent) status of this box, and the visiblity and collapsed
 * status and parent (or not parent) status for all children boxes.
 */
function compute_folder_children(&$parbox, $boxcount) {
    global $boxes, $data_dir, $username, $collapse_folders;
    $nextbox = $parbox + 1;

    /* Retreive the name for the parent box. */
    $parbox_name = $boxes[$parbox]['unformatted'];

    /* 'Initialize' this parent box to childless. */
    $boxes[$parbox]['parent'] = FALSE;

    /* Compute the collapse status for this box. */
    if( isset($collapse_folders) && $collapse_folders ) {
        $collapse = getPref($data_dir, $username, 'collapse_folder_' . $parbox_name);
        $collapse = ($collapse == '' ? SM_BOX_UNCOLLAPSED : $collapse);
    } else {
        $collapse = SM_BOX_UNCOLLAPSED;
    }
    $boxes[$parbox]['collapse'] = $collapse;

    /* Otherwise, get the name of the next box. */
    if (isset($boxes[$nextbox]['unformatted'])) {
        $nextbox_name = $boxes[$nextbox]['unformatted'];
    } else {
        $nextbox_name = '';
    }

    /* Compute any children boxes for this box. */
    while (($nextbox < $boxcount) &&
           (is_parent_box($boxes[$nextbox]['unformatted'], $parbox_name))) {

        /* Note that this 'parent' box has at least one child. */
        $boxes[$parbox]['parent'] = TRUE;

        /* Compute the visiblity of this box. */
        $boxes[$nextbox]['visible'] = ($boxes[$parbox]['visible'] &&
                                       ($boxes[$parbox]['collapse'] != SM_BOX_COLLAPSED));

        /* Compute the visibility of any child boxes. */
        compute_folder_children($nextbox, $boxcount);
    }

    /* Set the parent box to the current next box. */
    $parbox = $nextbox;
}

/**
 * Create the link for a parent folder that will allow that
 * parent folder to either be collapsed or expaned, as is
 * currently appropriate.
 */
function create_collapse_link($boxnum) {
    global $boxes, $imapConnection, $unseen_notify, $color;
    $mailbox = urlencode($boxes[$boxnum]['unformatted']);

    /* Create the link for this collapse link. */
    $link = '<a target="left" style="text-decoration:none" ' .
            'href="left_main.php?';
    if ($boxes[$boxnum]['collapse'] == SM_BOX_COLLAPSED) {
        $link .= "unfold=$mailbox\">+";
    } else {
        $link .= "fold=$mailbox\">-";
    }
    $link .= '</a>';

    $hooklink = do_hook_function('create_collapse_link',$link);
    if ($hooklink != '')
        $link = $hooklink;

    /* Return the finished product. */
    return ($link);
}

/**
 * create_unseen_string:
 *
 * Create unseen and total message count for both this folder and
 * it's subfolders.
 *
 * @param string $boxName name of the current mailbox
 * @param array $boxArray array for the current mailbox
 * @param $imapConnection current imap connection in use
 * @return array[0] unseen message string (for display)
 * @return array[1] unseen message count
 */
function create_unseen_string($boxName, $boxArray, $imapConnection, $unseen_type) {
    global $boxes, $unseen_type, $color, $unseen_cum;

    /* Initialize the return value. */
    $result = array(0,0);

    /* Initialize the counts for this folder. */
    $boxUnseenCount = 0;
    $boxMessageCount = 0;
    $totalUnseenCount = 0;
    $totalMessageCount = 0;

    /* Collect the counts for this box alone. */
    $status = sqimap_status_messages($imapConnection, $boxName);
    $boxUnseenCount = $status['UNSEEN'];
    if ($boxUnseenCount === false) {
    return false;
    }
    if ($unseen_type == 2) {
        $boxMessageCount = $status['MESSAGES'];
    }

    /* Initialize the total counts. */

    if ($boxArray['collapse'] == SM_BOX_COLLAPSED && $unseen_cum) {
        /* Collect the counts for this boxes subfolders. */
        $curBoxLength = strlen($boxName);
        $boxCount = count($boxes);

        for ($i = 0; $i < $boxCount; ++$i) {
            /* Initialize the counts for this subfolder. */
            $subUnseenCount = 0;
            $subMessageCount = 0;

            /* Collect the counts for this subfolder. */
            if (($boxName != $boxes[$i]['unformatted'])
                   && (substr($boxes[$i]['unformatted'], 0, $curBoxLength) == $boxName)
                   && !in_array('noselect', $boxes[$i]['flags'])) {
        $status = sqimap_status_messages($imapConnection, $boxes[$i]['unformatted']);
        $subUnseenCount = $status['UNSEEN'];
                if ($unseen_type == 2) {
                    $subMessageCount = $status['MESSAGES'];;
                }
                /* Add the counts for this subfolder to the total. */
                $totalUnseenCount += $subUnseenCount;
                $totalMessageCount += $subMessageCount;
            }
        }

        /* Add the counts for all subfolders to that of the box. */
        $boxUnseenCount += $totalUnseenCount;
        $boxMessageCount += $totalMessageCount;
    }

    /* And create the magic unseen count string.     */
    /* Really a lot more then just the unseen count. */
    if (($unseen_type == 1) && ($boxUnseenCount > 0)) {
        $result[0] = "($boxUnseenCount)";
    } else if ($unseen_type == 2) {
        $result[0] = "($boxUnseenCount/$boxMessageCount)";
        $result[0] = "<font color=\"$color[11]\">$result[0]</font>";
    }

    /* Set the unseen count to return to the outside world. */
    $result[1] = $boxUnseenCount;

    /* Return our happy result. */
    return ($result);
}

/**
 * This simple function checks if a box is another box's parent.
 */
function is_parent_box($curbox_name, $parbox_name) {
    global $delimiter;

    /* Extract the name of the parent of the current box. */
    $curparts = explode($delimiter, $curbox_name);
    $curname = array_pop($curparts);
    $actual_parname = implode($delimiter, $curparts);
    $actual_parname = substr($actual_parname,0,strlen($parbox_name));

    /* Compare the actual with the given parent name. */
    return ($parbox_name == $actual_parname);
}

function listBoxes ($boxes, $j=0 ) {
    global $data_dir, $username, $startmessage, $color, $unseen_notify, $unseen_type,
    $move_to_trash, $trash_folder, $collapse_folders, $imapConnection;
    $pre = '<nobr>';
    $end = '';
    $collapse = false;
    $unseen_type = 1;
    $unseen_notify = 0;
    $unseen = 0;

    /* Get unseen/total display prefs */
    $unseen_type = getPref( $data_dir , $username , 'unseen_type' );
    $unseen_notify = getPref( $data_dir , $username , 'unseen_notify' );

    if (isset($boxes) && !empty($boxes)) {
        $mailbox = $boxes->mailboxname_full;
        $leader = '<tt>';
        $leader .= str_repeat('&nbsp;&nbsp;',$j);
        $mailboxURL = urlencode($mailbox);

        /* get unseen/total messages information */
        /* Only need to display info when option is set */
        if (isset($unseen_notify) && ($unseen_notify > 1)) {
                    
            if ($boxes->unseen !== false) {
                $unseen = $boxes->unseen; 
            } else {        
                $unseen = 0;
            }   
        
            /* 
                Should only display unseen info if the folder is inbox
                or you set the option for all folders
            */

            if ((strtolower($mailbox) == 'inbox') || ($unseen_notify == 3)) {
                $unseen_string = $unseen;
                        

                /* If users requests, display message count too */
                if (isset($unseen_type) && ($unseen_type == 2)) {
                    $numMessages = $boxes->total;
                    $unseen_string .= '/' . $numMessages;
                }       
                
                $unseen_string = "<font color=\"$color[11]\">($unseen_string)</font>";
            
                /*
                    Finally allow the script to display the values by setting a boolean.
                    This can only occur if the unseen count is great than 0 (if you have
                    unseen count only), or you have the message count too.
                */
                if (($unseen > 0) || (isset($unseen_type) && ($unseen_type ==2))) {
                    $unseen_found = true;
                }
        
            }   
        
        }

        if (isset($boxes->mbxs[0]) && $collapse_folders) {
            $collapse = getPref($data_dir, $username, 'collapse_folder_' . $mailbox);
            $collapse = ($collapse == '' ? SM_BOX_UNCOLLAPSED : $collapse);

            $link = '<a target="left" style="text-decoration:none" ' .'href="left_main.php?';
            if ($collapse) {
                $link .= "unfold=$mailboxURL\">$leader+&nbsp;</tt>";
            } else {
                $link .= "fold=$mailboxURL\">$leader-&nbsp;</tt>";
            }
            $link .= '</a>';
            $pre .= $link;
        } else {
            $pre.= $leader . '&nbsp;&nbsp;</tt>';
        }

        /* If there are unseen message, bold the line. */
        if (($move_to_trash) && ($mailbox == $trash_folder)) {
            if (! isset($boxes->total)) {
                $boxes->total = sqimap_status_messages($imapConnection, $mailbox);
            }
            if ($unseen > 0) {
                $pre .= '<b>';
            }
            $pre .= "<a href=\"right_main.php?PG_SHOWALL=0&amp;sort=0;startMessage=1&amp;mailbox=$mailboxURL\" target=\"right\" style=\"text-decoration:none\">";
            if ($unseen > 0) {
                $end .= '</b>';
            }
            $end .= '</a>';
            if ($boxes->total > 0) {
                if ($unseen > 0) {
                    $pre .= '<b>';
                }
                $pre .= "<a href=\"right_main.php?PG_SHOWALL=0&amp;sort=0;startMessage=1&amp;mailbox=$mailboxURL\" target=\"right\" style=\"text-decoration:none\">";
                if ($unseen > 0) {
                    $end .= '</b>';
                }
                $end .= "\n<small>\n" .
                        "&nbsp;&nbsp;(<a href=\"empty_trash.php\" style=\"text-decoration:none\">"._("purge")."</a>)" .
                        "</small>";
            }
        } else {
            if (!$boxes->is_noselect) {
                if ($unseen > 0) {
                    $pre .= '<b>';
                }
                $pre .= "<a href=\"right_main.php?PG_SHOWALL=0&amp;sort=0&amp;startMessage=1&amp;mailbox=$mailboxURL\" target=\"right\" style=\"text-decoration:none\">";
                if ($unseen > 0) {
                    $end .= '</b>';
                }
                $end .= '</a>';
            }
        }

        /* Print unseen information. */
        if (isset($unseen_found) && $unseen_found) {
            $end .= "&nbsp;<small>$unseen_string</small>";
        }

        $font = '';
        $fontend = '';
        if ($boxes->is_special) {
            $font = "<font color=\"$color[11]\">";
            $fontend = "</font>";
        }
        $end .= '</nobr>';

        if (!$boxes->is_root) {
            echo "" . $pre .$font. $boxes->mailboxname_sub .$fontend . $end. '<br />' . "\n";
            $j++;
        }

        if (!$collapse || $boxes->is_root) {
            for ($i = 0; $i <count($boxes->mbxs); $i++) {
                listBoxes($boxes->mbxs[$i],$j);
            }
        }
    }
}

function ListAdvancedBoxes ($boxes, $mbx, $j='ID.0000' ) {
    global $data_dir, $username, $startmessage, $color, $unseen_notify, $unseen_type,
    $move_to_trash, $trash_folder, $collapse_folders;

    /* use_folder_images only works if the images exist in ../images */
    $use_folder_images = true;

    $pre = '';
    $end = '';
    $collapse = false;
    $unseen_found = false;
    $unseen = 0;

    if ($boxes) {
    $mailbox = $boxes->mailboxname_full;
    $mailboxURL = urlencode($mailbox);

    /* Only need to display info when option is set */
    if (isset($unseen_notify) && ($unseen_notify > 1) && (($boxes->unseen !== false) || ($boxes->total !== false))) {

        if ($boxes->unseen !== false)
            $unseen = $boxes->unseen;

        /* 
            Should only display unseen info if the folder is inbox
            or you set the option for all folders
        */

        if ((strtolower($mailbox) == 'inbox') || ($unseen_notify == 3)) {
            $unseen_string = $unseen;

            /* If users requests, display message count too */
            if (isset($unseen_type) && ($unseen_type == 2) && ($boxes->total !== false))
                $unseen_string .= '/' . $boxes->total;

            $unseen_string = "<font color=\"$color[11]\">($unseen_string)</font>";

            /*
                Finally allow the script to display the values by setting a boolean.
                This can only occur if the unseen count is great than 0 (if you have
                unseen count only), or you have the message count too.
            */
            if (($unseen > 0) || (isset($unseen_type) && ($unseen_type ==2))) {
                $unseen_found = true;
            }
        
        }   
        
    }

    /* If there are unseen message, bold the line. */
    if ($unseen > 0) { $pre .= '<b>'; }

    /* color special boxes */
    if ($boxes->is_special) {
            $pre .= "<font color=\"$color[11]\">";
        $end .= '</font>';
    }

    /* If there are unseen message, close bolding. */
    if ($unseen > 0) { $end .= '</b>'; }

    /* Print unseen information. */
    if (isset($unseen_found) && $unseen_found) {
            $end .= "&nbsp;$unseen_string";
    }

    if (($move_to_trash) && ($mailbox == $trash_folder)) {
            if (! isset($numMessages)) {
            $numMessages = $boxes->total;
            }
            $pre .= "<a class=\"mbx_link\" href=\"right_main.php?PG_SHOWALL=0&amp;sort=0&amp;startMessage=1&amp;mailbox=$mailboxURL\" target=\"right\">";
            $end .= '</a>';
            if ($numMessages > 0) {
            $urlMailbox = urlencode($mailbox);
            $end .= "\n<small>\n" .
                    "&nbsp;&nbsp;(<a class=\"mbx_link\" href=\"empty_trash.php\">"._("purge")."</a>)" .
                    "</small>";
            }
    } else {
        if (!$boxes->is_noselect) { /* \Noselect boxes can't be selected */
        $pre .= "<a class=\"mbx_link\" href=\"right_main.php?PG_SHOWALL=0&amp;sort=0&amp;startMessage=1&amp;mailbox=$mailboxURL\" target=\"right\">";
        $end .= '</a>';
        }
    }

    if (!$boxes->is_root) {
        if ($use_folder_images) {
          if ($boxes->is_inbox) {
        $folder_img = '../images/inbox.png';
          } else if ($boxes->is_sent) {
        $folder_img = '../images/senti.png';
          } else if ($boxes->is_trash) {
        $folder_img = '../images/delitem.png';
          } else if ($boxes->is_draft) {
        $folder_img = '../images/draft.png';
          } else if ($boxes->is_noinferiors) {
        $folder_img = '../images/folder_noinf.png';
          } else $folder_img = '../images/folder.png';
          $folder_img = '&nbsp;<img src="'.$folder_img.'" height="15" valign="center" />&nbsp;';
        } else $folder_img = '';
        if (!isset($boxes->mbxs[0])) {
            echo '   ' . html_tag( 'div',
                            '<tt>'. $pre . $folder_img . '</tt>'. $boxes->mailboxname_sub . $end,
                    'left', '', 'class="mbx_sub" id="' .$j. '"' )
                . "\n";
        } else {
            /* get collapse information */
        if ($collapse_folders) {
            $link = '<a target="left" style="text-decoration:none" ' .'href="left_main.php?';
            $form_entry = $j.'F';
            if (isset($mbx) && isset($mbx[$form_entry])) {
                $collapse = $mbx[$form_entry];
            if ($collapse) {
                    setPref($data_dir, $username, 'collapse_folder_'.$boxes->mailboxname_full , SM_BOX_COLLAPSED);
            } else {
                    setPref($data_dir, $username, 'collapse_folder_'.$boxes->mailboxname_full , SM_BOX_UNCOLLAPSED);
            }
            } else {
            $collapse = getPref($data_dir, $username, 'collapse_folder_' . $mailbox);
                $collapse = ($collapse == '' ? SM_BOX_UNCOLLAPSED : $collapse);
            }
            if ($collapse) {
                $link = '<a href="javascript:void(0)">'." <img src=\"../images/plus.png\" border=\"1\" id=$j onclick=\"hidechilds(this)\" /></a>";
            } else {
                $link = '<a href="javascript:void(0)">'."<img src=\"../images/minus.png\" border=\"1\" id=$j onclick=\"hidechilds(this)\" /></a>";
            }
            $collapse_link = $link;
        } else $collapse_link='';
            echo '   ' . html_tag( 'div',
                            $collapse_link . $pre . $folder_img . '&nbsp;'. $boxes->mailboxname_sub . $end ,
                    'left', '', 'class="mbx_par" id="' .$j. 'P"' )
                . "\n";
        echo '   <input type="hidden" name="mbx['.$j. 'F]" value="'.$collapse.'" id="mbx['.$j.'F]" />'."\n";
        }
    }
    if ($collapse) {
        $visible = ' style="display:none;"';
    } else {
        $visible = ' style="display:block;"';
    }

    if (isset($boxes->mbxs[0]) && !$boxes->is_root) /* mailbox contains childs */
        echo html_tag( 'div', '', 'left', '', 'class="par_area" id='.$j.'.0000 '. $visible ) . "\n";

        if ($j !='ID.0000') {
           $j = $j .'.0000';
    }
        for ($i = 0; $i <count($boxes->mbxs); $i++) {
        $j++;
            listAdvancedBoxes($boxes->mbxs[$i],$mbx,$j);
        }
    if (isset($boxes->mbxs[0]) && !$boxes->is_root ) echo '</div>'."\n\n";
    }
}




/* -------------------- MAIN ------------------------ */

/* get globals */
sqgetGlobalVar('username', $username, SQ_SESSION);
sqgetGlobalVar('key', $key, SQ_COOKIE);
sqgetGlobalVar('delimiter', $delimiter, SQ_SESSION);
sqgetGlobalVar('onetimepad', $onetimepad, SQ_SESSION);

sqgetGlobalVar('fold', $fold, SQ_GET);
sqgetGlobalVar('unfold', $unfold, SQ_GET);

/* end globals */

// open a connection on the imap port (143)
$imapConnection = sqimap_login($username, $key, $imapServerAddress, $imapPort, 10); // the 10 is to hide the output

/**
 * Using stristr since older preferences may contain "None" and "none".
 */
if (isset($left_refresh) && ($left_refresh != '') &&
    !stristr($left_refresh, 'none')){
    $xtra =  "\n<meta http-equiv=\"Expires\" content=\"Thu, 01 Dec 1994 16:00:00 GMT\" />\n" .
             "<meta http-equiv=\"Pragma\" content=\"no-cache\" />\n".
             "<meta http-equiv=\"REFRESH\" content=\"$left_refresh;URL=left_main.php\" />\n";
} else {
    $xtra = '';
}

/**
 * $advanced_tree and $oldway are boolean vars which are default set to default
 * SM behaviour.
 * Setting $oldway to false causes left_main.php to use the new  experimental
 * way of getting the mailbox-tree.
 * Setting $advanced tree to true causes SM to display a experimental
 * mailbox-tree with dhtml behaviour.
 * It only works on browsers which supports css and javascript. The used
 * javascript is experimental and doesn't support all browsers. It is tested on
 * IE6 an Konquerer 3.0.0-2.
 * In the function ListAdvancedBoxes there is another var $use_folder_images.
 * setting this to true is only usefull if the images exists in ../images.
 *
 * Feel free to experiment with the code and report bugs and enhancements
 * to marc@its-projects.nl
 **/

$advanced_tree = false; /* set this to true if you want to see a nicer mailboxtree */
$oldway = false;        /* default SM behaviour */

if ($advanced_tree) {
$xtra .= <<<ECHO
<script language="Javascript" TYPE="text/javascript">

<!--

    function preload() {
      if (document.images) {
        var treeImages = new Array;
        var arguments = preload.arguments;
        for (var i = 0; i<arguments.length; i++) {
          treeImages[i] = new Image();
          treeImages[i].src = arguments[i];
        }
      }
    }

var vTreeImg;
var vTreeDiv;
var vTreeSrc;

    function fTreeTimeout() {
      if (vTreeDiv.readyState == "complete")
        vTreeImg.src = vTreeSrc;
      else
        setTimeout("fTreeTimeout()", 100);
    }

    function hidechilds(img) {
      id = img.id + ".0000";
      form_id = "mbx[" + img.id +"F]";
      if (document.all) {	//IE
        div = document.all[id];
        if (div) {
           if (div.style.display == "none") {
              vTreeSrc = "../images/minus.png";
              style = "block";
              value = 0;
           }
           else {
              vTreeSrc = "../images/plus.png";
              style = "none";
              value = 1;
           }
           vTreeImg = img;
           vTreeDiv = div;
           setTimeout("fTreeTimeout()",100);
           div.style.display = style;
           document.all[form_id].value = value;
        }
      }
      else if (document.getElementById) {	//Mozilla
        div = document.getElementById(id);
        if (div) {
           if (div.style.display == "none") {
              src = "../images/minus.png";
              style = "block";
              value = 0;
           }
           else {
              src = "../images/plus.png";
              style = "none";
              value = 1;
           }
           div.style.display = style;
           img.src = src;
           document.getElementById(form_id).value = value;
        }
      }
    }

   function buttonover(el,on) {
      if (!on) {
         el.style.borderColor="blue";}
      else {
         el.style.borderColor="orange";}
   }

   function buttonclick(el,on) {
      if (!on) {
         el.style.border="groove"}
      else {
         el.style.border="ridge";}
   }

   function hideframe(hide) {

ECHO;
$xtra .= "      left_size = \"$left_size\";\n";
$xtra .= <<<ECHO
      if (document.all) {
        masterf = window.parent.document.all["fs1"];
    leftf = window.parent.document.all["left"];
    leftcontent = document.all["leftframe"];
    leftbutton = document.all["showf"];
      } else if (document.getElementById) {
    masterf = window.parent.document.getElementById("fs1");
    leftf = window.parent.document.getElementById("left");
    leftcontent = document.getElementById("leftframe");
    leftbutton = document.getElementById("showf");
      } else {
        return false;
      }
      if(hide) {
         new_col = calc_col("20");
         masterf.cols = new_col;
     document.body.scrollLeft=0;
     document.body.style.overflow='hidden';
     leftcontent.style.display = 'none';
     leftbutton.style.display='block';
      } else {
         masterf.cols = calc_col(left_size);
     document.body.style.overflow='';
     leftbutton.style.display='none';
     leftcontent.style.display='block';

      }
   }

   function calc_col(c_w) {

ECHO;
   if ($location_of_bar == 'right') {
       $xtra .= '     right=true;';
   } else {
       $xtra .= '     right=false;';
   }
   $xtra .= "\n";
$xtra .= <<<ECHO
     if (right) {
         new_col = '*,'+c_w;
     } else {
         new_col = c_w+',*';
     }
     return new_col;
   }

   function resizeframe(direction) {
     if (document.all) {
        masterf = window.parent.document.all["fs1"];
     } else if (document.getElementById) {
    window.parent.document.getElementById("fs1");
     } else {
        return false;
     }

ECHO;
   if ($location_of_bar == 'right') {
       $xtra .= '  colPat=/^\*,(\d+)$/;';
   } else {
       $xtra .= '  colPat=/^(\d+),.*$/;';
   }
   $xtra .= "\n";

$xtra .= <<<ECHO
     old_col = masterf.cols;
     colPat.exec(old_col);

     if (direction) {
        new_col_width = parseInt(RegExp.$1) + 25;

     } else {
        if (parseInt(RegExp.$1) > 35) {
           new_col_width = parseInt(RegExp.$1) - 25;
        }
     }
     masterf.cols = calc_col(new_col_width);
   }

//-->

</script>

ECHO;

/* style definitions */

$xtra .= <<<ECHO

<style type="text/css">
<!--
  body {
     margin: 0px 0px 0px 0px;
     padding: 5px 5px 5px 5px;
  }

  .button {
     border:outset;
     border-color:blue;
     background:white;
     width:99%;
     heigth:99%;
  }

  .mbx_par {
     font-size:1.0em;
     margin-left:4px;
     margin-right:0px;
  }

  a.mbx_link {
      text-decoration: none;
      background-color: $color[0];
      display: inline;
  }

  a:hover.mbx_link {
      background-color: $color[9];
  }

  a.mbx_link img {
      border-style: none;
  }

  .mbx_sub {
     padding-left:5px;
     padding-right:0px;
     margin-left:4px;
     margin-right:0px;
     font-size:0.9em;
  }

  .par_area {
     margin-top:0px;
     margin-left:4px;
     margin-right:0px;
     padding-left:10px;
     padding-bottom:5px;
     border-left: solid;
     border-left-width:0.1em;
     border-left-color:$color[9];
     border-bottom: solid;
     border-bottom-width:0.1em;
     border-bottom-color:$color[9];
     display: block;
  }

  .mailboxes {
     padding-bottom:3px;
     margin-right:4px;
     padding-right:4px;
     margin-left:4px;
     padding-left:4px;
     border: groove;
     border-width:0.1em;
     border-color:green;
     background: $color[0];
  }

-->

</style>

ECHO;

}




displayHtmlHeader( 'SquirrelMail', $xtra );

/* If requested and not yet complete, attempt to autocreate folders. */
if ($auto_create_special && !isset($auto_create_done)) {
    $autocreate = array($sent_folder, $trash_folder, $draft_folder);
    foreach( $autocreate as $folder ) {
        if (($folder != '') && ($folder != 'none')) {
            if ( !sqimap_mailbox_exists($imapConnection, $folder)) {
                sqimap_mailbox_create($imapConnection, $folder, '');
            } else if (!sqimap_mailbox_is_subscribed($imapConnection, $folder)) {
                sqimap_subscribe($imapConnection, $folder);
            }
        }
    }

    /* Let the world know that autocreation is complete! Hurrah! */
    $auto_create_done = TRUE;
    sqsession_register($auto_create_done, 'auto_create_done');
}

if ($advanced_tree)
  echo "\n<body" .
	' onload="preload(\'../images/minus.png\',\'../images/plus.png\')"' .
  " bgcolor=\"$color[3]\" text=\"$color[6]\" link=\"$color[6]\" vlink=\"$color[6]\" alink=\"$color[6]\">\n";
else
  echo "\n<body bgcolor=\"$color[3]\" text=\"$color[6]\" link=\"$color[6]\" vlink=\"$color[6]\" alink=\"$color[6]\">\n";

do_hook('left_main_before');
if ($advanced_tree) {
   /* nice future feature, needs layout !! volunteers?   */
   $right_pos = $left_size - 20;
/*   echo '<div style="position:absolute;top:0;border=solid;border-width:0.1em;border-color:blue;"><div ID="hidef" style="width=20;font-size:12"><A HREF="javascript:hideframe(true)"><b><<</b></a></div>';
   echo '<div ID="showf" style="width=20;font-size:12;display:none;"><a href="javascript:hideframe(false)"><b>>></b></a></div>';
   echo '<div ID="incrf" style="width=20;font-size:12"><a href="javascript:resizeframe(true)"><b>></b></a></div>';
   echo '<div ID="decrf" style="width=20;font-size:12"><a href="javascript:resizeframe(false)"><b><</b></a></div></div>';
   echo '<div ID="leftframe"><br /><br />';*/
}

echo "\n\n" . html_tag( 'table', '', 'left', '', 'border="0" cellspacing="0" cellpadding="0" width="99%"' ) .
    html_tag( 'tr' ) .
    html_tag( 'td', '', 'left' ) .
    '<center><font size="4"><b>'. _("Folders") . "</b><br /></font>\n\n";

if ($date_format != 6) {
    /* First, display the clock. */
    if ($hour_format == 1) {
        $hr = 'G:i';
        if ($date_format == 4) {
            $hr .= ':s';
        }
    } else {
        if ($date_format == 4) {
            $hr = 'g:i:s a';
        } else {
            $hr = 'g:i a';
        }
    }

    switch( $date_format ) {
    case 1:
        $clk = date('m/d/y '.$hr, time());
        break;
    case 2:
        $clk = date('d/m/y '.$hr, time());
        break;
    case 4:
    case 5:
        $clk = date($hr, time());
        break;
    default:
        $clk = substr( getDayName( date( 'w', time() ) ), 0, 3 ) . date( ', ' . $hr, time() );
    }
    $clk = str_replace(' ','&nbsp;',$clk);

    echo '<center><small>' . str_replace(' ','&nbsp;',_("Last Refresh")) .
         ": $clk</small></center>";
}

/* Next, display the refresh button. */
echo '<small>(<a href="../src/left_main.php" target="left">'.
     _("refresh folder list") . '</a>)</small></center><br />';

/* Lastly, display the folder list. */
if ( $collapse_folders ) {
    /* If directed, collapse or uncollapse a folder. */
    if (isset($fold)) {
        setPref($data_dir, $username, 'collapse_folder_' . $fold, SM_BOX_COLLAPSED);
    } else if (isset($unfold)) {
        setPref($data_dir, $username, 'collapse_folder_' . $unfold, SM_BOX_UNCOLLAPSED);
    }
}

if ($oldway) {  /* normal behaviour SM */

$boxes = sqimap_mailbox_list($imapConnection);
/* Prepare do do out collapsedness and visibility computation. */
$curbox = 0;
$boxcount = count($boxes);

/* Compute the collapsedness and visibility of each box. */

while ($curbox < $boxcount) {
    $boxes[$curbox]['visible'] = TRUE;
    compute_folder_children($curbox, $boxcount);
}

for ($i = 0; $i < count($boxes); $i++) {
    if ( $boxes[$i]['visible'] ) {
        $mailbox = $boxes[$i]['formatted'];
        $mblevel = substr_count($boxes[$i]['unformatted'], $delimiter) + 1;

        /* Create the prefix for the folder name and link. */
        $prefix = str_repeat('  ',$mblevel);
        if (isset($collapse_folders) && $collapse_folders && $boxes[$i]['parent']) {
            $prefix = str_replace(' ','&nbsp;',substr($prefix,0,strlen($prefix)-2)).
                      create_collapse_link($i) . '&nbsp;';
        } else {
            $prefix = str_replace(' ','&nbsp;',$prefix);
        }
        $line = "<nobr><tt>$prefix</tt>";

        /* Add the folder name and link. */
        if (! isset($color[15])) {
            $color[15] = $color[6];
        }

        if (in_array('noselect', $boxes[$i]['flags'])) {
            if( isSpecialMailbox( $boxes[$i]['unformatted']) ) {
                $line .= "<font color=\"$color[11]\">";
            } else {
                $line .= "<font color=\"$color[15]\">";
            }
            if (ereg("^( *)([^ ]*)", $mailbox, $regs)) {
                $mailbox = str_replace('&nbsp;','',$mailbox);
                $line .= str_replace(' ', '&nbsp;', $mailbox);
            }
            $line .= '</font>';
        } else {
            $line .= formatMailboxName($imapConnection, $boxes[$i]);
        }

        /* Put the final touches on our folder line. */
        $line .= "</nobr><br>\n";

        /* Output the line for this folder. */
        echo $line;
    }
}
} else {  /* expiremental code */
    $boxes = sqimap_mailbox_tree($imapConnection);
    if (isset($advanced_tree) && $advanced_tree) {
        echo '<form name="collapse" action="left_main.php" method="post" ' .
             'enctype="multipart/form-data"'."\n";
        echo '<small>';
/*      echo '<button type="submit" class="button" onmouseover="buttonover(this,true)" onmouseout="buttonover(this,false)" onmousedown="buttonclick(this,true)" onmouseup="buttonclick(this,false)">'. _("Save folder tree") .'</button><br /><br />';*/
        echo '<div id="mailboxes" class="mailboxes">'."\n\n";
        if (!isset($mbx)) $mbx=NULL;
        ListAdvancedBoxes($boxes, $mbx);
        echo '</div></small>'."\n";
        echo '</form>'."\n";
    } else {
        //sqimap_get_status_mbx_tree($imap_stream,$boxes)    
        ListBoxes($boxes);
    }
} /* if ($oldway) else ... */
do_hook('left_main_after');
sqimap_logout($imapConnection);

echo '</td></tr></table>' . "\n".
    "</div></body></html>\n";

?>