/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Bugzilla Tweaks.
 *
 * The Initial Developer of the Original Code is Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Johnathan Nightingale <johnath@mozilla.com>
 *   Ehsan Akhgari <ehsan@mozilla.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

var reAttachmentType = /,\s+([^ )]*)[;)]/;

function viewAttachmentSource(doc) {
  function addLink(elem, title, href) {
    if (elem.textContent.match(/[\S]/)) {
      elem.appendChild(doc.createTextNode(" | "));
    }
    var link = doc.createElement("a");
    link.href = href;
    link.textContent = title;
    elem.appendChild(link);
  }
  var table = doc.getElementById("attachment_table");
  if (!table)
    return;
  var rows = table.querySelectorAll("tr");
  for ( var i = 0; i < rows.length; ++i) {
    var items = rows[i].querySelectorAll("td");
    if (items.length != 3)
      continue;
    var links = items[0].querySelectorAll("a");
    if (links.length == 0)
      continue;
    var attachHref = links[0].href;
    // get the type of the attachment
    var span = items[0].querySelector(".bz_attach_extra_info");
    if (!span)
      continue;
    var typeName = null;
    try {
      // Match mime type followed by ";" (charset) or ")" (no charset)
      typeName = span.textContent.match(reAttachmentType)[1];
      typeName = typeName.split(";")[0]; // ignore charset following type
    }
    catch (e) {
    }
    if (typeName == "application/java-archive"
        || typeName == "application/x-jar") {
      // Due to the fix for bug 369814, only zip files with this special
      // mime type can be used with the jar: protocol.
      // http://hg.mozilla.org/mozilla-central/rev/be54f6bb9e1e
      addLink(items[2], "JAR Contents", "jar:" + attachHref
          + "!/");
      // https://bugzilla.mozilla.org/show_bug.cgi?id=369814#c5 has more
      // possible mime types for zips?
    }
    else if (typeName == "application/zip"
        || typeName == "application/x-zip-compressed"
        || typeName == "application/x-xpinstall") {
      addLink(items[2], "Static ZIP Contents", "jar:"
          + attachHref + "!/");
    }
    else if (typeName != "text/plain" && typeName != "patch" &&
    // Other types that Gecko displays like text/plain
    // http://mxr.mozilla.org/mozilla-central/source/parser/htmlparser/public/nsIParser.h
    typeName != "text/css" && typeName != "text/javascript"
        && typeName != "text/ecmascript"
        && typeName != "application/javascript"
        && typeName != "application/ecmascript"
        && typeName != "application/x-javascript" &&
        // Binary image types for which the "source" is not useful
        typeName != "image/gif" && typeName != "image/png"
        && typeName != "image/jpeg") {
      addLink(items[2], "Source", "view-source:" + attachHref);
    }
  }
}