+ /* Create the prefix for the folder name and link. */
+ $prefix = str_repeat(' ',$mblevel);
+ if (isset($collapse_folders) && $collapse_folders && $boxes[$i]['parent']) {
+ $prefix = str_replace(' ',' ',substr($prefix,0,strlen($prefix)-2));
+ $prefix .= create_collapse_link($i) . ' ';
+ } else {
+ $prefix = str_replace(' ',' ',$prefix);
+ }
+ $line = "<NOBR><TT>$prefix</TT>";
+
+ /* Add the folder name and link. */
+ if (in_array('noselect', $boxes[$i]['flags'])) {
+ $line .= "<FONT COLOR=\"$color[10]\">";
+ if (ereg("^( *)([^ ]*)", $mailbox, $regs)) {
+ $line .= str_replace(' ', ' ', $mailbox);
+ }
+ $line .= '</FONT>';
+ } else {
+ $line .= formatMailboxName($imapConnection, $boxes[$i], $delimeter);
+ }
+
+ /* Put the final touches on our folder line. */
+ $line .= "</NOBR><BR>\n";
+
+ /* Output the line for this folder. */
+ echo $line;
+ }
+ }
+ sqimap_logout($imapConnection);
+ do_hook("left_main_after");
+
+ /**
+ * 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;
+ $mailbox = urlencode($boxes[$boxnum]['unformatted']);
+
+ /* Create the link for this collapse link. */
+ $link = '<a target="left" style="text-decoration:none" ';
+ $link .= 'href="left_main.php?';
+ if ($boxes[$boxnum]['collapse'] == SM_BOX_COLLAPSED) {
+ $link .= "unfold=$mailbox\">+";
+ } else {
+ $link .= "fold=$mailbox\">-";
+ }
+ $link .= '</a>';
+
+ /* Return the finished product. */
+ return ($link);
+ }
+
+ /**
+ * This simple function checks if a box is another box's parent.
+ */
+ function is_parent_box($curbox_name, $parbox_name) {
+ global $delimeter;
+
+ /* Extract the name of the parent of the current box. */
+ $curparts = explode($delimeter, $curbox_name);
+ $curname = array_pop($curparts);
+ $actual_parname = implode($delimeter, $curparts);
+ $actual_parname = substr($actual_parname,0,strlen($parbox_name));
+
+ /* Compare the actual with the given parent name. */
+ return ($parbox_name == $actual_parname);
+ }
+
+ /**
+ * Recursive function that computes the collapsed status and parent
+ * (or not parent) status of this box, and the visiblity and collapsed
+ * status and parent (or not parent) status for all children boxes.
+ */
+ function compute_folder_children(&$parbox, $boxcount) {
+ global $boxes;
+ $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. */
+ $collapse = 0;
+ $collapse = getPref($data_dir, $username, 'collapse_folder_' . $parbox_name);
+ $collapse = ($collapse == '' ? SM_BOX_UNCOLLAPSED : $collapse);
+ $boxes[$parbox]['collapse'] = $collapse;
+
+ /* Otherwise, get the name of the next box. */
+ $nextbox_name = $boxes[$nextbox]['unformatted'];
+
+ /* 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. */
+ if ($boxes[$parbox]['visible'] &&
+ ($boxes[$parbox]['collapse'] != SM_BOX_COLLAPSED)) {
+ $boxes[$nextbox]['visible'] = true;
+ } else {
+ $boxes[$nextbox]['visible'] = false;
+ }