کد PHP:
<?PHP
/*
Here are the database definitions used in this code.
It should be fairly east to adapt it to another database.
*/
/*
CREATE TABLE dirent_types (
id INTEGER NOT NULL,
icon VARCHAR(50),
name VARCHAR(50),
PRIMARY KEY(id)
);
INSERT INTO dirent_types VALUES(1, 'folderclosed', 'Directory');
INSERT INTO dirent_types VALUES(2, 'document', 'File');
CREATE TABLE directory (
id INTEGER NOT NULL,
parent INTEGER REFERENCES directory(id),
name VARCHAR(200),
icon VARCHAR(50),
type INTEGER REFERENCES dirent_types(id),
url VARCHAR(200),
PRIMARY KEY(id)
);
DROP INDEX directory_idx;
CREATE UNIQUE INDEX directory_idx ON directory(parent, name);
CREATE SEQUENCE dirent_id;
"CREATE PROCEDURE insert_dir_entry
(name VARCHAR, parent INTEGER, type INTEGER)
RETURNS(id INTEGER)
BEGIN
EXEC SQL WHENEVER SQLERROR ABORT;
EXEC SEQUENCE dirent_id.NEXT INTO id;
EXEC SQL PREPARE c_insert
INSERT INTO directory
(id, parent, type, name)
VALUES(?, ?, ?, ?);
EXEC SQL EXECUTE c_insert USING (id, parent, type, name);
EXEC SQL DROP c_insert;
END";
CALL insert_dir_entry('My Computer', NULL, 1);
CALL insert_dir_entry('Network Neighbourhood', NULL, 1);
CALL insert_dir_entry('lucifer.guardian.no', 2, 1);
CALL insert_dir_entry('rafael.guardian.no', 2, 1);
CALL insert_dir_entry('uriel.guardian.no', 2, 1);
CALL insert_dir_entry('Control Panel', NULL, 1);
CALL insert_dir_entry('Services', 6, 1);
CALL insert_dir_entry('Apache', 7, 2);
CALL insert_dir_entry('Solid Server 2.2', 7, 2);
*/
FUNCTION icon($icon, $name = '', $width = 0, $height = 0) {
GLOBAL $DOCUMENT_ROOT;
$icon_loc = '/pics/menu';
$file = "$DOCUMENT_ROOT$icon_loc/$icon.gif";
IF (!$width || !$height) {
$iconinfo = GETIMAGESIZE($file);
IF (!$width) {
$width = $iconinfo[0];
}
IF (!$height) {
$height = $iconinfo[1];
}
}
PRINTF( '<img%s border=0 align=top src="/pics/menu/%s.gif" '.
'width="%d" height="%d">', $name ? " name=\"$name\"" : '',
$icon, $width, $height);
}
/*
* Displays, recursively, the contents of a tree given a starting
* point.
*
* Parameters:
* $parent - the parent node (not listed in the directory). Node
* 0 is the root node.
*
* $maxdepth (optional) - maximum number of recursion levels. -1
* (the default value) means no limits.
*
* $ancestors (optional) - an array of the ancestor nodes in the
* current branch of the tree, with the node closest to the
* top at index 0.
*
* Global variables used:
* $child_nodes
* $node_data
* $last_child
*
* Global variables modified:
* The array pointers in $child_nodes will be modified.
*/
FUNCTION display_directory($parent, $showdepth = 0, $ancestors = FALSE) {
GLOBAL $child_nodes, $node_data, $last_child;
RESET($child_nodes[$parent]);
$size = SIZEOF($child_nodes[$parent]);
$lastindex = $size - 1;
IF (!$ancestors) {
$ancestors = ARRAY();
}
$depth = SIZEOF($ancestors);
PRINTF( '<div id="node_%d" class="dirEntry" visibility="%s">',
$parent, $showdepth > 0 ? 'show' : 'hide');
WHILE (LIST($index, $node) = EACH($child_nodes[$parent])) {
/*
For each of the uptree nodes:
If an uptree node is not the last one on its depth
of the branch, there should be a line instead of a blank
before this node's icon.
*/
FOR ($i = 0; $i < $depth; $i++) {
$up_parent = (int)$node_data[$ancestors[$i]][ 'parent'];
$last_node_on_generation = $last_child[$up_parent];
$uptree_node_on_generation = $ancestors[$i];
IF ($last_node_on_generation == $uptree_node_on_generation) {
icon( "blank");
} ELSE {
icon( "line");
}
}
IF ($child_nodes[$node]) { // has children, i.e. it is a folder
$conn_icon = "plus";
$expand = TRUE;
} ELSE {
$conn_icon = "join";
$expand = FALSE;
}
IF ($index == $lastindex) {
$conn_icon .= "bottom";
} ELSEIF ($depth == 0 && $index == 0) {
$conn_icon .= "top";
}
IF ($expand) {
PRINTF( "<a href=\"javascript<b></b>:document.layers['node_%d'].visibility='show'\">", $node);
}
icon($conn_icon, "connImg_$node");
IF ($expand) {
PRINT( "</a>");
}
$icon = $node_data[$node][ 'icon'];
IF (!$icon) {
$type = $node_data[$node][ 'type'];
$icon = $GLOBALS[ 'dirent_icons'][$type];
}
icon($icon, "nodeImg_$node");
$name = $node_data[$node][ 'name'];
PRINTF( '?<font size="%d">%s</font><br%c>', -1, $name, 10);
IF ($child_nodes[$node]) {
$newdepth = $showdepth;
IF ($newdepth > 0) {
$newdepth--;
}
$new_ancestors = $ancestors;
$new_ancestors[] = $node;
display_directory($node, $newdepth, $new_ancestors);
}
}
PRINT( "</div\n>");
}
FUNCTION setup_directory($parent, $maxdepth)
{
GLOBAL $dirent_icons, $child_nodes, $node_data, $last_child;
$dirent_icons = sql_assoc( 'SELECT id,icon FROM dirent_types');
$query = 'SELECT id,parent,type,icon,name '.
'FROM directory '.
'ORDER BY parent,name';
$child_nodes = ARRAY();
$node_data = ARRAY();
$res = sql($query);
WHILE (LIST($id, $parent, $type, $icon, $name) = db_fetch_row($res)) {
$child_nodes[(int)$parent][] = $id;
$node_data[$id] = ARRAY( 'id' => $id,
'parent' => $parent,
'type' => $type,
'icon' => $icon,
'name' => $name);
$last_child[(int)$parent] = $id;
}
}
?>
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