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/* IVLE - Informatics Virtual Learning Environment
* Copyright (C) 2007-2008 The University of Melbourne
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Module: Listing (File Browser, client)
* Author: Matt Giuca
* Date: 13/1/2008
*
* Handles directory listings on the client side.
*/
/* DOM nodeType constants */
ELEMENT_NODE = 1;
/** Filenames of all files selected */
selected_files = [];
/** Updates the side-panel and status bar to reflect the current set of
* selected files. This is done by inspecting the states of the check boxes.
* Also changes the styling to highlight selected files.
*/
function update_selection()
{
/* First get a list of all files that are selected, and
* reset the styling on each file's row. */
var files_children = document.getElementById("files").childNodes;
var tr;
var checkbox;
var row_toggle = 1;
selected_files = []; /* Clear global selected_files */
/* Children are trs */
for (var i=0; i<files_children.length; i++)
{
tr = files_children[i];
checked = tr.firstChild.firstChild.checked;
/* Set the class for every row based on both the checked state,
* and whether it is odd or even */
tr.setAttribute("class", "row" + row_toggle.toString() +
(checked ? "sel" : ""))
row_toggle = row_toggle == 1 ? 2 : 1;
if (checked)
{
/* Add the filename (column 3) to the selected_files list */
filename = tr.childNodes[3].firstChild;
if (filename.nodeType == ELEMENT_NODE)
filename = filename.firstChild.data;
else
filename = filename.data;
selected_files[selected_files.length] = filename;
}
}
}
/** Clears all selected files and causes the single file specified to become
* selected.
* \param fileid The index of the file in the list to select.
*/
function select_file(fileid)
{
var files_children = document.getElementById("files").childNodes;
var checkbox;
for (var i=0; i<files_children.length; i++)
{
tr = files_children[i];
checkbox = tr.firstChild.firstChild;
checkbox.checked = i == fileid;
}
update_selection();
}
/** Initialises the DOM elements required to present a dir listing,
* assuming that clear_page has just been called or the page just
* loaded for the first time.
*/
function setup_for_dir_listing()
{
var filesbody = document.getElementById("filesbody");
/* Using a table-based layout, for reasons of sanity */
/* One row, 2 columns */
var middle = document.createElement("table");
filesbody.appendChild(middle);
middle.setAttribute("id", "middle");
var middle_tbody = document.createElement("tbody");
middle.appendChild(middle_tbody);
var middle_tr = document.createElement("tr");
middle_tbody.appendChild(middle_tr);
/* Column 1: File table */
var filetable = document.createElement("td");
middle_tr.appendChild(filetable);
filetable.setAttribute("id", "filetable");
var filetablediv = document.createElement("div");
filetable.appendChild(filetablediv);
filetablediv.setAttribute("id", "filetablediv");
/* A nested table within this div - the actual files listing */
var filetabletable = document.createElement("table");
filetablediv.appendChild(filetabletable);
filetabletable.setAttribute("width", "100%");
var filetablethead = document.createElement("thead");
filetabletable.appendChild(filetablethead);
var filetablethead_tr = document.createElement("tr");
filetablethead.appendChild(filetablethead_tr);
filetablethead_tr.setAttribute("class", "rowhead");
/* Row headers */
var filetablethead_th = document.createElement("th");
filetablethead_tr.appendChild(filetablethead_th);
filetablethead_th.setAttribute("class", "col-check");
filetablethead_th = dom_make_link_elem("th", "Filename",
"Sort by filename", "")
filetablethead_tr.appendChild(filetablethead_th);
filetablethead_th.setAttribute("class", "col-filename");
filetablethead_th.setAttribute("colspan", 3);
filetablethead_th = dom_make_link_elem("th", "Size",
"Sort by file size", "")
filetablethead_tr.appendChild(filetablethead_th);
filetablethead_th.setAttribute("class", "col-size");
filetablethead_th = dom_make_link_elem("th", "Modified",
"Sort by date modified", "")
filetablethead_tr.appendChild(filetablethead_th);
filetablethead_th.setAttribute("class", "col-date");
/* Empty body */
var filetabletbody = document.createElement("tbody");
filetabletable.appendChild(filetabletbody);
filetabletbody.setAttribute("id", "files");
/* Column 2: Side-panel */
var sidepanel = document.createElement("td");
middle_tr.appendChild(sidepanel);
sidepanel.setAttribute("id", "sidepanel");
/* Now after the table "middle", there is a status bar */
var statusbar = document.createElement("div");
filesbody.appendChild(statusbar);
statusbar.setAttribute("id", "statusbar");
}
/** Presents the directory listing.
*/
function handle_dir_listing(path, listing)
{
setmode(false);
setup_for_dir_listing();
var row_toggle = 1;
var i;
/* Nav through the top-level of the JSON to the actual listing object. */
var listing = listing.listing;
/* Get "." out, it's special */
var thisdir = listing["."];
delete listing["."];
/* Is this dir under svn? */
var under_subversion = "svnstatus" in thisdir;
var files = document.getElementById("files");
var file;
var row;
var td;
var checkbox;
var total_files = 0;
var total_file_size = 0; /* In bytes */
var selection_string;
/* Create all of the files */
i = 0;
for (var filename in listing)
{
selection_string = "select_file(" + i.toString() + ")";
file = listing[filename];
total_files++;
if ("size" in file)
total_file_size += file.size;
/* Make a 'tr' element */
row = document.createElement("tr");
/* Column 1: Selection checkbox */
row.setAttribute("class", "row" + row_toggle.toString())
row_toggle = row_toggle == 1 ? 2 : 1;
td = document.createElement("td");
checkbox = document.createElement("input");
checkbox.setAttribute("type", "checkbox");
checkbox.setAttribute("title", "Select this file");
checkbox.setAttribute("onchange", "update_selection()");
td.appendChild(checkbox);
row.appendChild(td);
if (file.isdir)
{
/* Column 2: Filetype and subversion icons. */
td = document.createElement("td");
td.setAttribute("class", "thincol");
td.setAttribute("onclick", selection_string);
td.appendChild(dom_make_img(mime_type_to_icon("text/directory"),
22, 22, file.type));
row.appendChild(td);
td = document.createElement("td");
td.setAttribute("class", "thincol");
if (under_subversion)
td.appendChild(dom_make_img(svnstatus_to_icon(file.svnstatus),
22, 22, file.svnstatus));
row.appendChild(td);
/* Column 3: Filename */
td = dom_make_link_elem("td", filename,
"Navigate to " + path_join(path, filename),
make_path(path_join(this_app, path, filename)),
"navigate(" + path_join(path, filename) + ")");
td.setAttribute("onclick", selection_string);
row.appendChild(td);
}
else
{
/* Column 2: Filetype and subversion icons. */
td = document.createElement("td");
td.setAttribute("class", "thincol");
td.appendChild(dom_make_img(mime_type_to_icon(file.type),
22, 22, file.type));
row.appendChild(td);
td = document.createElement("td");
td.setAttribute("class", "thincol");
if (under_subversion)
td.appendChild(dom_make_img(svnstatus_to_icon(file.svnstatus),
22, 22, file.svnstatus));
row.appendChild(td);
/* Column 3: Filename */
td = dom_make_text_elem("td", filename);
td.setAttribute("onclick", selection_string);
row.appendChild(td);
}
/* Column 4: Size */
td = dom_make_text_elem("td", nice_filesize(file.size));
td.setAttribute("onclick", selection_string);
row.appendChild(td);
/* Column 4: Date */
td = dom_make_text_elem("td", file.mtime_short, file.mtime_nice);
td.setAttribute("onclick", selection_string);
row.appendChild(td);
files.appendChild(row);
i++;
}
/* Write to the status bar */
var statusbar = document.getElementById("statusbar");
var statusmsg = total_files.toString() + " files, "
+ nice_filesize(total_file_size);
dom_removechildren(statusbar);
statusbar.appendChild(document.createTextNode(statusmsg));
}
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