Fix drag-n-drop after folder move/create (#1489648)

Aleksander Machniak

2014-07-25 2c0d3e1dd0a3df01c8adea0de5f2826f0bcb9434

 program/js/app.js

@@ -544,7 +544,7 @@
    // select first input field in an edit form
    if (this.gui_objects.editform)
      $("input,select,textarea", this.gui_objects.editform)
        .not(':hidden').not(':disabled').first().select();
        .not(':hidden').not(':disabled').first().select().focus();

    // unset contentframe variable if preview_pane is enabled
    if (this.env.contentframe && !$('#' + this.env.contentframe).is(':visible'))
@@ -658,17 +658,18 @@

      // remove copy from local storage if compose screen is left intentionally
      this.remove_compose_data(this.env.compose_id);
      this.compose_skip_unsavedcheck = true;
    }

    this.last_command = command;

    // process external commands
    if (typeof this.command_handlers[command] === 'function') {
      ret = this.command_handlers[command](props, obj);
      ret = this.command_handlers[command](props, obj, event);
      return ret !== undefined ? ret : (obj ? false : true);
    }
    else if (typeof this.command_handlers[command] === 'string') {
      ret = window[this.command_handlers[command]](props, obj);
      ret = window[this.command_handlers[command]](props, obj, event);
      return ret !== undefined ? ret : (obj ? false : true);
    }

@@ -719,6 +720,7 @@

          if (win) {
            this.save_compose_form_local();
            this.compose_skip_unsavedcheck = true;
            $("input[name='_action']", form).val('compose');
            form.action = this.url('mail/compose', { _id: this.env.compose_id, _extwin: 1 });
            form.target = win.name;
@@ -1402,7 +1404,7 @@

    if (task == 'mail')
      url += '&_mbox=INBOX';
    else if (task == 'logout')
    else if (task == 'logout' && !this.env.server_error)
      this.clear_compose_data();

    this.redirect(url);
@@ -3372,63 +3374,7 @@
    }

    // check for locally stored compose data
    if (window.localStorage) {
      var key, formdata, index = this.local_storage_get_item('compose.index', []);

      for (i = 0; i < index.length; i++) {
        key = index[i];
        formdata = this.local_storage_get_item('compose.' + key, null, true);
        if (!formdata) {
          continue;
        }
        // restore saved copy of current compose_id
        if (formdata.changed && key == this.env.compose_id) {
          this.restore_compose_form(key, html_mode);
          break;
        }
        // skip records from 'other' drafts
        if (this.env.draft_id && formdata.draft_id && formdata.draft_id != this.env.draft_id) {
          continue;
        }
        // skip records on reply
        if (this.env.reply_msgid && formdata.reply_msgid != this.env.reply_msgid) {
          continue;
        }
        // show dialog asking to restore the message
        if (formdata.changed && formdata.session != this.env.session_id) {
          this.show_popup_dialog(
            this.get_label('restoresavedcomposedata')
              .replace('$date', new Date(formdata.changed).toLocaleString())
              .replace('$subject', formdata._subject)
              .replace(/\n/g, '<br/>'),
            this.get_label('restoremessage'),
            [{
              text: this.get_label('restore'),
              click: function(){
                ref.restore_compose_form(key, html_mode);
                ref.remove_compose_data(key);  // remove old copy
                ref.save_compose_form_local();  // save under current compose_id
                $(this).dialog('close');
              }
            },
            {
              text: this.get_label('delete'),
              click: function(){
                ref.remove_compose_data(key);
                $(this).dialog('close');
              }
            },
            {
              text: this.get_label('ignore'),
              click: function(){
                $(this).dialog('close');
              }
            }]
          );
          break;
        }
      }
    }
    this.compose_restore_dialog(0, html_mode)

    if (input_to.val() == '')
      input_to.focus();
@@ -3445,6 +3391,72 @@
    // start the auto-save timer
    this.auto_save_start();
  };

  this.compose_restore_dialog = function(j, html_mode)
  {
    var i, key, formdata, index = this.local_storage_get_item('compose.index', []);

    var show_next = function(i) {
      if (++i < index.length)
        ref.compose_restore_dialog(i, html_mode)
    }

    for (i = j || 0; i < index.length; i++) {
      key = index[i];
      formdata = this.local_storage_get_item('compose.' + key, null, true);
      if (!formdata) {
        continue;
      }
      // restore saved copy of current compose_id
      if (formdata.changed && key == this.env.compose_id) {
        this.restore_compose_form(key, html_mode);
        break;
      }
      // skip records from 'other' drafts
      if (this.env.draft_id && formdata.draft_id && formdata.draft_id != this.env.draft_id) {
        continue;
      }
      // skip records on reply
      if (this.env.reply_msgid && formdata.reply_msgid != this.env.reply_msgid) {
        continue;
      }
      // show dialog asking to restore the message
      if (formdata.changed && formdata.session != this.env.session_id) {
        this.show_popup_dialog(
          this.get_label('restoresavedcomposedata')
            .replace('$date', new Date(formdata.changed).toLocaleString())
            .replace('$subject', formdata._subject)
            .replace(/\n/g, '<br/>'),
          this.get_label('restoremessage'),
          [{
            text: this.get_label('restore'),
            click: function(){
              ref.restore_compose_form(key, html_mode);
              ref.remove_compose_data(key);  // remove old copy
              ref.save_compose_form_local();  // save under current compose_id
              $(this).dialog('close');
            }
          },
          {
            text: this.get_label('delete'),
            click: function(){
              ref.remove_compose_data(key);
              $(this).dialog('close');
              show_next(i);
            }
          },
          {
            text: this.get_label('ignore'),
            click: function(){
              $(this).dialog('close');
              show_next(i);
            }
          }]
        );
        break;
      }
    }
  }

  this.init_address_input_events = function(obj, props)
  {
@@ -3474,6 +3486,7 @@
    form._draft.value = draft ? '1' : '';
    form.action = this.add_url(form.action, '_unlock', msgid);
    form.action = this.add_url(form.action, '_lang', lang);
    form.action = this.add_url(form.action, '_framed', 1);

    // register timer to notify about connection timeout
    this.submit_timer = setTimeout(function(){
@@ -3722,10 +3735,7 @@
    // submit delete request
    if (key && confirm(this.get_label('deleteresponseconfirm'))) {
      this.http_post('settings/delete-response', { _key: key }, false);
      return true;
    }

    return false;
  };

  // updates spellchecker buttons on state change
@@ -3782,6 +3792,7 @@

    // always remove local copy upon saving as draft
    this.remove_compose_data(this.env.compose_id);
    this.compose_skip_unsavedcheck = false;
  };

  this.auto_save_start = function()
@@ -3806,6 +3817,21 @@
          ref.compose_type_activity_last = ref.compose_type_activity;
        }
      }, 5000);

      $(window).unload(function() {
        // remove copy from local storage if compose screen is left after warning
        if (!ref.env.server_error)
          ref.remove_compose_data(ref.env.compose_id);
      });
    }

    // check for unsaved changes before leaving the compose page
    if (!window.onbeforeunload) {
      window.onbeforeunload = function() {
        if (!ref.compose_skip_unsavedcheck && ref.cmp_hash != ref.compose_field_hash()) {
          return ref.get_label('notsentwarning');
        }
      };
    }

    // Unlock interface now that saving is complete
@@ -3872,15 +3898,16 @@
      }
    });

    if (window.localStorage && !empty) {
    if (!empty) {
      var index = this.local_storage_get_item('compose.index', []),
        key = this.env.compose_id;

        if ($.inArray(key, index) < 0) {
          index.push(key);
        }
        this.local_storage_set_item('compose.' + key, formdata, true);
        this.local_storage_set_item('compose.index', index);
      if ($.inArray(key, index) < 0) {
        index.push(key);
      }

      this.local_storage_set_item('compose.' + key, formdata, true);
      this.local_storage_set_item('compose.index', index);
    }
  };

@@ -3912,27 +3939,24 @@
  // remove stored compose data from localStorage
  this.remove_compose_data = function(key)
  {
    if (window.localStorage) {
      var index = this.local_storage_get_item('compose.index', []);
    var index = this.local_storage_get_item('compose.index', []);

      if ($.inArray(key, index) >= 0) {
        this.local_storage_remove_item('compose.' + key);
        this.local_storage_set_item('compose.index', $.grep(index, function(val,i) { return val != key; }));
      }
    if ($.inArray(key, index) >= 0) {
      this.local_storage_remove_item('compose.' + key);
      this.local_storage_set_item('compose.index', $.grep(index, function(val,i) { return val != key; }));
    }
  };

  // clear all stored compose data of this user
  this.clear_compose_data = function()
  {
    if (window.localStorage) {
      var i, index = this.local_storage_get_item('compose.index', []);
    var i, index = this.local_storage_get_item('compose.index', []);

      for (i=0; i < index.length; i++) {
        this.local_storage_remove_item('compose.' + index[i]);
      }
      this.local_storage_remove_item('compose.index');
    for (i=0; i < index.length; i++) {
      this.local_storage_remove_item('compose.' + index[i]);
    }

    this.local_storage_remove_item('compose.index');
  };


@@ -3953,18 +3977,16 @@
        return;
    }

    var i, rx,
      id = obj.options[obj.selectedIndex].value,
    var id = obj.options[obj.selectedIndex].value,
      sig = this.env.identity,
      delim = this.env.recipients_separator,
      rx_delim = RegExp.escape(delim),
      headers = ['replyto', 'bcc'];
      rx_delim = RegExp.escape(delim);

    // update reply-to/bcc fields with addresses defined in identities
    for (i in headers) {
      var key = headers[i],
        old_val = sig && this.env.identities[sig] ? this.env.identities[sig][key] : '',
        new_val = id && this.env.identities[id] ? this.env.identities[id][key] : '',
    $.each(['replyto', 'bcc'], function() {
      var rx, key = this,
        old_val = sig && ref.env.identities[sig] ? ref.env.identities[sig][key] : '',
        new_val = id && ref.env.identities[id] ? ref.env.identities[id][key] : '',
        input = $('[name="_'+key+'"]'), input_val = input.val();

      // remove old address(es)
@@ -3991,7 +4013,7 @@

      if (old_val || new_val)
        input.val(input_val).change();
    }
    });

    // enable manual signature insert
    if (this.env.signatures && this.env.signatures[id]) {
@@ -4309,6 +4331,7 @@
  this.sent_successfully = function(type, msg, folders)
  {
    this.display_message(msg, type);
    this.compose_skip_unsavedcheck = true;

    if (this.env.extwin) {
      this.lock_form(this.gui_objects.messageform);
@@ -5700,10 +5723,8 @@
      id = this.env.iid ? this.env.iid : selection[0];

    // submit request with appended token
    if (confirm(this.get_label('deleteidentityconfirm')))
      this.goto_url('delete-identity', { _iid: id, _token: this.env.request_token }, true);

    return true;
    if (id && confirm(this.get_label('deleteidentityconfirm')))
      this.http_post('settings/delete-identity', { _iid: id }, true);
  };

  this.update_identity_row = function(id, name, add)
@@ -5747,6 +5768,23 @@
        frame.location.href = this.env.blankpage;
      }
    }

    this.enable_command('delete', false);
  };

  this.remove_identity = function(id)
  {
    var frame, list = this.identity_list,
      rid = this.html_identifier(id);

    if (list && id) {
      list.remove_row(rid);
      if (this.env.contentframe && (frame = this.get_frame_window(this.env.contentframe))) {
        frame.location.href = this.env.blankpage;
      }
    }

    this.enable_command('delete', false);
  };


@@ -5761,39 +5799,52 @@
    this.last_sub_rx = RegExp('['+delim+']?[^'+delim+']+$');

    this.subscription_list = new rcube_treelist_widget(this.gui_objects.subscriptionlist, {
        selectable: true
        selectable: true,
        id_prefix: 'rcmli',
        id_encode: this.html_identifier_encode,
        id_decode: this.html_identifier_decode
    });

    this.subscription_list
      .addEventListener('select', function(node) { ref.subscription_select(node.id); })
      .draggable({cancel: '#mailboxroot'})
      .addEventListener('collapse', function(node) { ref.folder_collapsed(node) })
      .addEventListener('expand', function(node) { ref.folder_collapsed(node) })
      .draggable({cancel: 'li.mailbox.root'})
      .droppable({
        // @todo: find better way, accept callback is executed for every folder
        // on the list when dragging starts (and stops), this is slow, but
        // I didn't find a method to check droptarget on over event
        accept: function(node) {
          var source = ref.env.subscriptionrows[$(node).attr('id')],
            dest = ref.env.subscriptionrows[this.id],
            source_name = source[0],
            dest_name = dest[0];
          var source_folder = ref.folder_id2name($(node).attr('id')),
            dest_folder = ref.folder_id2name(this.id),
            source = ref.env.subscriptionrows[source_folder],
            dest = ref.env.subscriptionrows[dest_folder];

          return !source[2]
            && dest_name != source_name.replace(ref.last_sub_rx, '')
            && !dest_name.startsWith(source_name + ref.env.delimiter);
          return source && !source[2]
            && dest_folder != source_folder.replace(ref.last_sub_rx, '')
            && !dest_folder.startsWith(source_folder + ref.env.delimiter);
        },
        drop: function(e, ui) {
          ref.subscription_move_folder(ui.draggable.attr('id'), this.id);
          var source = ref.folder_id2name(ui.draggable.attr('id')),
            dest = ref.folder_id2name(this.id);

          ref.subscription_move_folder(source, dest);
        }
      });
  };

  this.folder_id2name = function(id)
  {
    return ref.html_identifier_decode(id.replace(/^rcmli/, ''));
  };

  this.subscription_select = function(id)
  {
    var folder;

    if (id && id != 'mailboxroot' && (folder = this.env.subscriptionrows[id])) {
      this.env.mailbox = folder[0];
      this.show_folder(folder[0]);
    if (id && id != '*' && (folder = this.env.subscriptionrows[id])) {
      this.env.mailbox = id;
      this.show_folder(id);
      this.enable_command('delete-folder', !folder[2]);
    }
    else {
@@ -5805,16 +5856,13 @@

  this.subscription_move_folder = function(from, to)
  {
    var source = this.env.subscriptionrows[from][0];
      dest = this.env.subscriptionrows[to][0];

    if (source && dest !== null && source != dest && dest != source.replace(this.last_sub_rx, '')) {
      var path = source.split(this.env.delimiter),
    if (from && to !== null && from != to && to != from.replace(this.last_sub_rx, '')) {
      var path = from.split(this.env.delimiter),
        basename = path.pop(),
        newname = dest === '' ? basename : dest + this.env.delimiter + basename;
        newname = to === '' || to === '*' ? basename : to + this.env.delimiter + basename;

      if (newname != source) {
        this.http_post('rename-folder', {_folder_oldname: source, _folder_newname: newname},
      if (newname != from) {
        this.http_post('rename-folder', {_folder_oldname: from, _folder_newname: newname},
          this.set_busy(true, 'foldermoving'));
      }
    }
@@ -5829,50 +5877,54 @@
  // delete a specific mailbox with all its messages
  this.delete_folder = function(name)
  {
    var id = this.get_folder_row_id(name ? name : this.env.mailbox),
      folder = this.env.subscriptionrows[id][0];
    if (!name)
      name = this.env.mailbox;

    if (folder && confirm(this.get_label('deletefolderconfirm'))) {
      this.http_post('delete-folder', {_mbox: folder}, this.set_busy(true, 'folderdeleting'));
    if (name && confirm(this.get_label('deletefolderconfirm'))) {
      this.http_post('delete-folder', {_mbox: name}, this.set_busy(true, 'folderdeleting'));
    }
  };

  // Add folder row to the table and initialize it
  this.add_folder_row = function (name, display_name, is_protected, subscribed, skip_init, class_name)
  this.add_folder_row = function (id, name, display_name, is_protected, subscribed, class_name, refrow, subfolders)
  {
    if (!this.gui_objects.subscriptionlist)
      return false;

    var row, n, tmp, tmp_name, rowid, collator,
      folders = [], list = [], slist = [],
      list_element = $(this.gui_objects.subscriptionlist),
      refrow = $('li', list_element).get(1),
      id = 'rcmli'+((new Date).getTime());
    // disable drag-n-drop temporarily
    this.subscription_list.draggable('destroy').droppable('destroy');

    if (!refrow) {
    var row, n, tmp, tmp_name, rowid, collator, pos, p, parent = '',
      folders = [], list = [], slist = [],
      list_element = $(this.gui_objects.subscriptionlist);
      row = refrow ? refrow : $($('li', list_element).get(1)).clone(true);

    if (!row.length) {
      // Refresh page if we don't have a table row to clone
      this.goto_url('folders');
      return false;
    }

    // clone a table row if there are existing rows
    row = $(refrow).clone(true);

    // set ID, reset css class
    row.attr({id: id, 'class': class_name});
    row.attr({id: 'rcmli' + this.html_identifier_encode(id), 'class': class_name});

    if (!refrow || !refrow.length) {
      // remove old subfolders and toggle
      $('ul,div.treetoggle', row).remove();
    }

    // set folder name
    $('.name', row).html(display_name);
    $('a:first', row).text(display_name);

    // update subscription checkbox
    $('input[name="_subscribed[]"]', row).val(name)
    $('input[name="_subscribed[]"]:first', row).val(id)
      .prop({checked: subscribed ? true : false, disabled: is_protected ? true : false});

    // add to folder/row-ID map
    this.env.subscriptionrows[id] = [name, display_name, false];

    // copy folders data to an array for sorting
    $.each(this.env.subscriptionrows, function(k, v) { folders.push(v); });
    $.each(this.env.subscriptionrows, function(k, v) { v[3] = k; folders.push(v); });

    try {
      // use collator if supported (FF29, IE11, Opera15, Chrome24)
@@ -5884,64 +5936,106 @@
    folders.sort(function(a, b) {
      var i, f1, f2,
        path1 = a[0].split(ref.env.delimiter),
        path2 = b[0].split(ref.env.delimiter);
        path2 = b[0].split(ref.env.delimiter),
        len = path1.length;

      for (i=0; i<path1.length; i++) {
      for (i=0; i<len; i++) {
        f1 = path1[i];
        f2 = path2[i];

        if (f1 !== f2) {
          if (f2 === undefined)
            return 1;
          if (collator)
            return collator.compare(f1, f2);
          else
            return f1 < f2 ? -1 : 1;
        }
        else if (i == len-1) {
          return -1
        }
      }
    });

    for (n in folders) {
      p = folders[n][3];
      // protected folder
      if (folders[n][2]) {
        tmp_name = folders[n][0] + this.env.delimiter;
        tmp_name = p + this.env.delimiter;
        // prefix namespace cannot have subfolders (#1488349)
        if (tmp_name == this.env.prefix_ns)
          continue;
        slist.push(folders[n][0]);
        slist.push(p);
        tmp = tmp_name;
      }
      // protected folder's child
      else if (tmp && folders[n][0].startsWith(tmp))
        slist.push(folders[n][0]);
      else if (tmp && p.startsWith(tmp))
        slist.push(p);
      // other
      else {
        list.push(folders[n][0]);
        list.push(p);
        tmp = null;
      }
    }

    // check if subfolder of a protected folder
    for (n=0; n<slist.length; n++) {
      if (name.startsWith(slist[n] + this.env.delimiter))
        rowid = this.get_folder_row_id(slist[n]);
      if (id.startsWith(slist[n] + this.env.delimiter))
        rowid = slist[n];
    }

    // find folder position after sorting
    for (n=0; !rowid && n<list.length; n++) {
      if (n && list[n] == name)
        rowid = this.get_folder_row_id(list[n-1]);
      if (n && list[n] == id)
        rowid = list[n-1];
    }

    // add row to the table
    if (rowid)
      $('#' + rowid).after(row);
    else
    if (rowid && (n = this.subscription_list.get_item(rowid, true))) {
      // find parent folder
      if (pos = id.lastIndexOf(this.env.delimiter)) {
        parent = id.substring(0, pos);
        parent = this.subscription_list.get_item(parent, true);

        // add required tree elements to the parent if not already there
        if (!$('div.treetoggle', parent).length) {
          $('<div>&nbsp;</div>').addClass('treetoggle collapsed').appendTo(parent);
        }
        if (!$('ul', parent).length) {
          $('<ul>').css('display', 'none').appendTo(parent);
        }
      }

      if (parent && n == parent) {
        $('ul:first', parent).append(row);
      }
      else {
        while (p = $(n).parent().parent().get(0)) {
          if (parent && p == parent)
            break;
          if (!$(p).is('li.mailbox'))
            break;
          n = p;
        }

        $(n).after(row);
      }
    }
    else {
      list_element.append(row);
    }

    // add subfolders
    $.extend(this.env.subscriptionrows, subfolders || {});

    // update list widget
    this.subscription_list.select();
    this.subscription_list.reset(true);
    this.subscription_select();

    if (!skip_init)
      this.init_subscription_list();
    // expand parent
    if (parent) {
      this.subscription_list.expand(this.folder_id2name(parent.id));
    }

    row = row.get(0);
    if (row.scrollIntoView)
@@ -5951,113 +6045,71 @@
  };

  // replace an existing table row with a new folder line (with subfolders)
  this.replace_folder_row = function(oldfolder, newfolder, display_name, is_protected, class_name)
  this.replace_folder_row = function(oldid, id, name, display_name, is_protected, class_name)
  {
    if (!this.gui_objects.subscriptionlist) {
      if (this.is_framed)
        return parent.rcmail.replace_folder_row(oldfolder, newfolder, display_name, is_protected, class_name);
        return parent.rcmail.replace_folder_row(oldid, id, name, display_name, is_protected, class_name);

      return false;
    }

    var i, n, len, name, dispname, oldrow, tmprow, row, level,
      folders = this.env.subscriptionrows,
      id = this.get_folder_row_id(oldfolder),
      prefix_len = oldfolder.length,
      subscribed = $('input[name="_subscribed[]"]', $('#'+id)).prop('checked'),
      // find subfolders of renamed folder
      list = this.get_subfolders(oldfolder);
    var subfolders = {},
      row = this.subscription_list.get_item(oldid, true),
      parent = $(row).parent(),
      old_folder = this.env.subscriptionrows[oldid],
      prefix_len_id = oldid.length,
      prefix_len_name = old_folder[0].length,
      subscribed = $('input[name="_subscribed[]"]:first', row).prop('checked');

    // no renaming, only update class_name
    if (oldfolder == newfolder) {
      $('#'+id).attr('class', class_name || '');
    if (oldid == id) {
      $(row).attr('class', class_name || '');
      return;
    }

    // replace an existing table row
    this._remove_folder_row(id);
    row = $(this.add_folder_row(newfolder, display_name, is_protected, subscribed, true, class_name));
    // update subfolders
    $('li', row).each(function() {
      var fname = ref.folder_id2name(this.id),
        folder = ref.env.subscriptionrows[fname],
        newid = id + fname.slice(prefix_len_id);

    // detect tree depth change
    if (len = list.length) {
      level = (oldfolder.split(this.env.delimiter)).length - (newfolder.split(this.env.delimiter)).length;
      this.id = 'rcmli' + ref.html_identifier_encode(newid);
      $('input[name="_subscribed[]"]:first', this).val(newid);
      folder[0] = name + folder[0].slice(prefix_len_name);

      subfolders[newid] = folder;
      delete ref.env.subscriptionrows[fname];
    });

    // get row off the list
    row = $(row).detach();

    delete this.env.subscriptionrows[oldid];

    // remove parent list/toggle elements if not needed
    if (parent.get(0) != this.gui_objects.subscriptionlist && !$('li', parent).length) {
      $('ul,div.treetoggle', parent.parent()).remove();
    }

    // move subfolders to the new branch
    for (n=0; n<len; n++) {
      id = list[n];
      name = this.env.subscriptionrows[id][0];
      dispname = this.env.subscriptionrows[id][1];
      oldrow = $('#'+id);
      tmprow = oldrow.clone(true);
      oldrow.remove();
      row.after(tmprow);
      row = tmprow;
      // update folder index
      name = newfolder + name.slice(prefix_len);
      $('input[name="_subscribed[]"]', row).val(name);
      this.env.subscriptionrows[id][0] = name;
      // update the name if level is changed
      if (level != 0) {
        if (level > 0) {
          for (i=level; i>0; i--)
            dispname = dispname.replace(/^&nbsp;&nbsp;&nbsp;&nbsp;/, '');
        }
        else {
          for (i=level; i<0; i++)
            dispname = '&nbsp;&nbsp;&nbsp;&nbsp;' + dispname;
        }
        $('.name', row).html(dispname);
        this.env.subscriptionrows[id][1] = dispname;
      }
    }

    // update list widget
    this.init_subscription_list();
    // move the existing table row
    this.add_folder_row(id, name, display_name, is_protected, subscribed, class_name, row, subfolders);
  };

  // remove the table row of a specific mailbox from the table
  this.remove_folder_row = function(folder, subs)
  this.remove_folder_row = function(folder)
  {
    var n, len, list = [], id = this.get_folder_row_id(folder);
    var list = [], row = this.subscription_list.get_item(folder, true);

    // get subfolders if any
    if (subs)
      list = this.get_subfolders(folder);
    $('li', row).each(function() { list.push(ref.folder_id2name(this.id)); });

    // remove old row
    this._remove_folder_row(id);
    // remove folder row (and subfolders)
    this.subscription_list.remove(folder);

    // remove subfolders
    for (n=0, len=list.length; n<len; n++)
      this._remove_folder_row(list[n]);
  };

  this._remove_folder_row = function(id)
  {
    this.subscription_list.remove(id.replace(/^rcmli/, ''));
    $('#' + id).remove();
    delete this.env.subscriptionrows[id];
  };

  this.get_subfolders = function(folder)
  {
    var name, list = [],
      prefix = folder + this.env.delimiter,
      row = $('#'+this.get_folder_row_id(folder)).get(0);

    while (row = row.nextSibling) {
      if (row.id) {
        name = this.env.subscriptionrows[row.id][0];
        if (name && name.startsWith(prefix)) {
          list.push(row.id);
        }
        else
          break;
      }
    }

    return list;
    // update local list variable
    list.push(folder);
    $.each(list, function(i, v) { delete ref.env.subscriptionrows[v]; });
  };

  this.subscribe = function(folder)
@@ -6074,15 +6126,6 @@
      var lock = this.display_message(this.get_label('folderunsubscribing'), 'loading');
      this.http_post('unsubscribe', {_mbox: folder}, lock);
    }
  };

  // helper method to find a specific mailbox row ID
  this.get_folder_row_id = function(folder)
  {
    var id, folders = this.env.subscriptionrows;
    for (id in folders)
      if (folders[id] && folders[id][0] == folder)
        return id;
  };

  // when user select a folder in manager
@@ -6108,9 +6151,9 @@
  // disables subscription checkbox (for protected folder)
  this.disable_subscription = function(folder)
  {
    var id = this.get_folder_row_id(folder);
    if (id)
      $('input[name="_subscribed[]"]', $('#'+id)).prop('disabled', true);
    var row = this.subscription_list.get_item(folder, true);
    if (row)
      $('input[name="_subscribed[]"]:first', row).prop('disabled', true);
  };

  this.folder_size = function(folder)
@@ -7368,6 +7411,7 @@
    // save message in local storage and do not redirect
    if (this.env.action == 'compose') {
      this.save_compose_form_local();
      this.compose_skip_unsavedcheck = true;
    }
    else if (redirect_url) {
      setTimeout(function(){ ref.redirect(redirect_url, true); }, 2000);
@@ -7985,22 +8029,43 @@
  // wrapper for localStorage.getItem(key)
  this.local_storage_get_item = function(key, deflt, encrypted)
  {
    var item;

    // TODO: add encryption
    var item = localStorage.getItem(this.get_local_storage_prefix() + key);
    try {
      item = localStorage.getItem(this.get_local_storage_prefix() + key);
    }
    catch (e) { }

    return item !== null ? JSON.parse(item) : (deflt || null);
  };

  // wrapper for localStorage.setItem(key, data)
  this.local_storage_set_item = function(key, data, encrypted)
  {
    // TODO: add encryption
    return localStorage.setItem(this.get_local_storage_prefix() + key, JSON.stringify(data));
    // try/catch to handle no localStorage support, but also error
    // in Safari-in-private-browsing-mode where localStorage exists
    // but can't be used (#1489996)
    try {
      // TODO: add encryption
      localStorage.setItem(this.get_local_storage_prefix() + key, JSON.stringify(data));
      return true;
    }
    catch (e) {
      return false;
    }
  };

  // wrapper for localStorage.removeItem(key)
  this.local_storage_remove_item = function(key)
  {
    return localStorage.removeItem(this.get_local_storage_prefix() + key);
    try {
      localStorage.removeItem(this.get_local_storage_prefix() + key);
      return true;
    }
    catch (e) {
      return false;
    }
  };
}  // end object rcube_webmail