From 017c4f19fd91aa1f658131fae272617a14598a12 Mon Sep 17 00:00:00 2001
From: Thomas <tb@woodcrest.local>
Date: Thu, 16 Jan 2014 05:16:09 -0500
Subject: [PATCH] Refactor multi-threaded autocomple contact searching to make it available for other purposes, too

---
 program/js/app.js |  523 +++++++++++++++++++++++++++++++++++++++++----------------
 1 files changed, 371 insertions(+), 152 deletions(-)

diff --git a/program/js/app.js b/program/js/app.js
index ac06df6..654faa0 100644
--- a/program/js/app.js
+++ b/program/js/app.js
@@ -31,6 +31,7 @@
   this.onloads = [];
   this.messages = {};
   this.group2expand = {};
+  this.http_request_jobs = {};
 
   // webmail client settings
   this.dblclick_time = 500;
@@ -198,22 +199,23 @@
             multiselect:true, multiexpand:true, draggable:true, keyboard:true,
             column_movable:this.env.col_movable, dblclick_time:this.dblclick_time
             });
-          this.message_list.row_init = function(o){ p.init_message_row(o); };
-          this.message_list.addEventListener('dblclick', function(o){ p.msglist_dbl_click(o); });
-          this.message_list.addEventListener('click', function(o){ p.msglist_click(o); });
-          this.message_list.addEventListener('keypress', function(o){ p.msglist_keypress(o); });
-          this.message_list.addEventListener('select', function(o){ p.msglist_select(o); });
-          this.message_list.addEventListener('dragstart', function(o){ p.drag_start(o); });
-          this.message_list.addEventListener('dragmove', function(e){ p.drag_move(e); });
-          this.message_list.addEventListener('dragend', function(e){ p.drag_end(e); });
-          this.message_list.addEventListener('expandcollapse', function(e){ p.msglist_expand(e); });
-          this.message_list.addEventListener('column_replace', function(e){ p.msglist_set_coltypes(e); });
-          this.message_list.addEventListener('listupdate', function(e){ p.triggerEvent('listupdate', e); });
+          this.message_list
+            .addEventListener('initrow', function(o) { p.init_message_row(o); })
+            .addEventListener('dblclick', function(o) { p.msglist_dbl_click(o); })
+            .addEventListener('click', function(o) { p.msglist_click(o); })
+            .addEventListener('keypress', function(o) { p.msglist_keypress(o); })
+            .addEventListener('select', function(o) { p.msglist_select(o); })
+            .addEventListener('dragstart', function(o) { p.drag_start(o); })
+            .addEventListener('dragmove', function(e) { p.drag_move(e); })
+            .addEventListener('dragend', function(e) { p.drag_end(e); })
+            .addEventListener('expandcollapse', function(o) { p.msglist_expand(o); })
+            .addEventListener('column_replace', function(o) { p.msglist_set_coltypes(o); })
+            .addEventListener('listupdate', function(o) { p.triggerEvent('listupdate', o); })
+            .init();
 
           document.onmouseup = function(e){ return p.doc_mouse_up(e); };
           this.gui_objects.messagelist.parentNode.onmousedown = function(e){ return p.click_on_list(e); };
 
-          this.message_list.init();
           this.enable_command('toggle_status', 'toggle_flag', 'sort', true);
 
           // load messages
@@ -313,9 +315,11 @@
         if (this.gui_objects.contactslist) {
           this.contact_list = new rcube_list_widget(this.gui_objects.contactslist,
             { multiselect:true, draggable:false, keyboard:false });
-          this.contact_list.addEventListener('select', function(o){ ref.compose_recipient_select(o); });
-          this.contact_list.addEventListener('dblclick', function(o){ ref.compose_add_recipient('to'); });
-          this.contact_list.init();
+          this.contact_list
+            .addEventListener('initrow', function(o) { p.triggerEvent('insertrow', { cid:o.uid, row:o }); })
+            .addEventListener('select', function(o) { ref.compose_recipient_select(o); })
+            .addEventListener('dblclick', function(o) { ref.compose_add_recipient('to'); })
+            .init();
         }
 
         if (this.gui_objects.addressbookslist) {
@@ -352,13 +356,14 @@
         if (this.gui_objects.contactslist) {
           this.contact_list = new rcube_list_widget(this.gui_objects.contactslist,
             {multiselect:true, draggable:this.gui_objects.folderlist?true:false, keyboard:true});
-          this.contact_list.row_init = function(row){ p.triggerEvent('insertrow', { cid:row.uid, row:row }); };
-          this.contact_list.addEventListener('keypress', function(o){ p.contactlist_keypress(o); });
-          this.contact_list.addEventListener('select', function(o){ p.contactlist_select(o); });
-          this.contact_list.addEventListener('dragstart', function(o){ p.drag_start(o); });
-          this.contact_list.addEventListener('dragmove', function(e){ p.drag_move(e); });
-          this.contact_list.addEventListener('dragend', function(e){ p.drag_end(e); });
-          this.contact_list.init();
+          this.contact_list
+            .addEventListener('initrow', function(o) { p.triggerEvent('insertrow', { cid:o.uid, row:o }); })
+            .addEventListener('keypress', function(o) { p.contactlist_keypress(o); })
+            .addEventListener('select', function(o) { p.contactlist_select(o); })
+            .addEventListener('dragstart', function(o) { p.drag_start(o); })
+            .addEventListener('dragmove', function(e) { p.drag_move(e); })
+            .addEventListener('dragend', function(e) { p.drag_end(e); })
+            .init();
 
           if (this.env.cid)
             this.contact_list.highlight_row(this.env.cid);
@@ -415,35 +420,39 @@
         }
 
         if (this.gui_objects.identitieslist) {
-          this.identity_list = new rcube_list_widget(this.gui_objects.identitieslist, {multiselect:false, draggable:false, keyboard:false});
-          this.identity_list.addEventListener('select', function(o){ p.identity_select(o); });
-          this.identity_list.init();
-          this.identity_list.focus();
+          this.identity_list = new rcube_list_widget(this.gui_objects.identitieslist,
+            {multiselect:false, draggable:false, keyboard:false});
+          this.identity_list
+            .addEventListener('select', function(o) { p.identity_select(o); })
+            .init()
+            .focus();
 
           if (this.env.iid)
             this.identity_list.highlight_row(this.env.iid);
         }
         else if (this.gui_objects.sectionslist) {
           this.sections_list = new rcube_list_widget(this.gui_objects.sectionslist, {multiselect:false, draggable:false, keyboard:false});
-          this.sections_list.addEventListener('select', function(o){ p.section_select(o); });
-          this.sections_list.init();
-          this.sections_list.focus();
+          this.sections_list
+            .addEventListener('select', function(o) { p.section_select(o); })
+            .init()
+            .focus();
         }
         else if (this.gui_objects.subscriptionlist) {
           this.init_subscription_list();
         }
         else if (this.gui_objects.responseslist) {
           this.responses_list = new rcube_list_widget(this.gui_objects.responseslist, {multiselect:false, draggable:false, keyboard:false});
-          this.responses_list.addEventListener('select', function(list) {
-            var win, id = list.get_single_selection();
-            p.enable_command('delete', !!id && $.inArray(id, p.env.readonly_responses) < 0);
-            if (id && (win = p.get_frame_window(p.env.contentframe))) {
-              p.set_busy(true);
-              p.location_href({ _action:'edit-response', _key:id, _framed:1 }, win);
-            }
-          });
-          this.responses_list.init();
-          this.responses_list.focus();
+          this.responses_list
+            .addEventListener('select', function(list) {
+              var win, id = list.get_single_selection();
+              p.enable_command('delete', !!id && $.inArray(id, p.env.readonly_responses) < 0);
+              if (id && (win = p.get_frame_window(p.env.contentframe))) {
+                p.set_busy(true);
+                p.location_href({ _action:'edit-response', _key:id, _framed:1 }, win);
+              }
+            })
+            .init()
+            .focus();
         }
 
         break;
@@ -509,11 +518,12 @@
           id_prefix: 'rcmli',
           id_encode: this.html_identifier_encode,
           id_decode: this.html_identifier_decode,
-          check_droptarget: function(node){ return !node.virtual && ref.check_droptarget(node.id) }
+          check_droptarget: function(node) { return !node.virtual && ref.check_droptarget(node.id) }
         });
-        this.treelist.addEventListener('collapse', function(node){ ref.folder_collapsed(node) });
-        this.treelist.addEventListener('expand', function(node){ ref.folder_collapsed(node) });
-        this.treelist.addEventListener('select', function(node){ ref.triggerEvent('selectfolder', { folder:node.id, prefix:'rcmli' }) });
+        this.treelist
+          .addEventListener('collapse', function(node) { ref.folder_collapsed(node) })
+          .addEventListener('expand', function(node) { ref.folder_collapsed(node) })
+          .addEventListener('select', function(node) { ref.triggerEvent('selectfolder', { folder:node.id, prefix:'rcmli' }) });
       }
     }
 
@@ -842,14 +852,14 @@
       case 'move':
       case 'moveto': // deprecated
         if (this.task == 'mail')
-          this.move_messages(props);
+          this.move_messages(props, obj);
         else if (this.task == 'addressbook')
           this.move_contacts(props);
         break;
 
       case 'copy':
         if (this.task == 'mail')
-          this.copy_messages(props);
+          this.copy_messages(props, obj);
         else if (this.task == 'addressbook')
           this.copy_contacts(props);
         break;
@@ -1411,8 +1421,6 @@
 
   this.drag_start = function(list)
   {
-    var model = this.task == 'mail' ? this.env.mailboxes : this.env.contactfolders;
-
     this.drag_active = true;
 
     if (this.preview_timer)
@@ -2047,7 +2055,6 @@
       if (preview && this.message_list && this.message_list.rows[id] && this.message_list.rows[id].unread && this.env.preview_pane_mark_read >= 0) {
         this.preview_read_timer = setTimeout(function() {
           ref.set_message(id, 'unread', false);
-          ref.update_thread_root(id, 'read');
           if (ref.env.unread_counts[ref.env.mailbox]) {
             ref.env.unread_counts[ref.env.mailbox] -= 1;
             ref.set_unread_count(ref.env.mailbox, ref.env.unread_counts[ref.env.mailbox], ref.env.mailbox == 'INBOX');
@@ -2553,8 +2560,11 @@
     if (!row)
       return false;
 
-    if (flag == 'unread')
+    if (flag == 'unread') {
+      if (row.unread != status)
+        this.update_thread_root(uid, status ? 'unread' : 'read');
       row.unread = status;
+    }
     else if(flag == 'deleted')
       row.deleted = status;
     else if (flag == 'replied')
@@ -2612,10 +2622,12 @@
   };
 
   // copy selected messages to the specified mailbox
-  this.copy_messages = function(mbox)
+  this.copy_messages = function(mbox, obj)
   {
     if (mbox && typeof mbox === 'object')
       mbox = mbox.id;
+    else if (!mbox)
+      return this.folder_selector(obj, function(folder) { ref.command('copy', folder); });
 
     // exit if current or no mailbox specified
     if (!mbox || mbox == this.env.mailbox)
@@ -2632,10 +2644,12 @@
   };
 
   // move selected messages to the specified mailbox
-  this.move_messages = function(mbox)
+  this.move_messages = function(mbox, obj)
   {
     if (mbox && typeof mbox === 'object')
       mbox = mbox.id;
+    else if (!mbox)
+      return this.folder_selector(obj, function(folder) { ref.command('move', folder); });
 
     // exit if current or no mailbox specified
     if (!mbox || mbox == this.env.mailbox)
@@ -2662,20 +2676,7 @@
   // delete selected messages from the current mailbox
   this.delete_messages = function(event)
   {
-    var uid, i, len, trash = this.env.trash_mailbox,
-      list = this.message_list,
-      selection = list ? list.get_selection() : [];
-
-    // exit if no mailbox specified or if selection is empty
-    if (!this.env.uid && !selection.length)
-      return;
-
-    // also select childs of collapsed rows
-    for (i=0, len=selection.length; i<len; i++) {
-      uid = selection[i];
-      if (list.rows[uid].has_children && !list.rows[uid].expanded)
-        list.select_children(uid);
-    }
+    var list = this.message_list, trash = this.env.trash_mailbox;
 
     // if config is set to flag for deletion
     if (this.env.flag_for_deletion) {
@@ -2715,7 +2716,7 @@
     this._with_selected_messages('delete', post_data);
   };
 
-  // Send a specifc move/delete request with UIDs of all selected messages
+  // Send a specific move/delete request with UIDs of all selected messages
   // @private
   this._with_selected_messages = function(action, post_data, lock)
   {
@@ -2851,9 +2852,6 @@
       this.set_message(a_uids[i], 'unread', (flag == 'unread' ? true : false));
 
     this.http_post('mark', post_data, lock);
-
-    for (i=0; i<len; i++)
-      this.update_thread_root(a_uids[i], flag);
   };
 
   // set image to flagged or unflagged
@@ -3609,16 +3607,18 @@
   {
     var rc;
 
-    if (!this.env.draft_id && id && (rc = this.opener())) {
-      // refresh the drafts folder in opener window
-      if (rc.env.task == 'mail' && rc.env.action == '' && rc.env.mailbox == this.env.drafts_mailbox)
-        rc.command('checkmail');
+    if (id && id != this.env.draft_id) {
+      if (rc = this.opener()) {
+        // refresh the drafts folder in opener window
+        if (rc.env.task == 'mail' && rc.env.action == '' && rc.env.mailbox == this.env.drafts_mailbox)
+          rc.command('checkmail');
+      }
+
+      this.env.draft_id = id;
+      $("input[name='_draft_saveid']").val(id);
+
+      this.remove_compose_data(this.env.compose_id);
     }
-
-    this.env.draft_id = id;
-    $("input[name='_draft_saveid']").val(id);
-
-    this.remove_compose_data(this.env.compose_id);
   };
 
   this.auto_save_start = function()
@@ -4339,7 +4339,7 @@
       p = inp_value.lastIndexOf(this.env.recipients_separator, cpos-1),
       q = inp_value.substring(p+1, cpos),
       min = this.env.autocomplete_min_length,
-      ac = this.ksearch_data;
+      data = this.ksearch_data;
 
     // trim query string
     q = $.trim(q);
@@ -4366,34 +4366,26 @@
       return;
 
     // ...new search value contains old one and previous search was not finished or its result was empty
-    if (old_value && old_value.length && q.startsWith(old_value) && (!ac || ac.num <= 0) && this.env.contacts && !this.env.contacts.length)
+    if (old_value && old_value.length && q.startsWith(old_value) && (!data || data.num <= 0) && this.env.contacts && !this.env.contacts.length)
       return;
 
-    var i, lock, source, xhr, reqid = new Date().getTime(),
-      post_data = {_search: q, _id: reqid},
-      threads = props && props.threads ? props.threads : 1,
-      sources = props && props.sources ? props.sources : [],
-      action = props && props.action ? props.action : 'mail/autocomplete';
+    var sources = props && props.sources ? props.sources : [''];
+    var reqid = this.multi_thread_http_request({
+      items: sources,
+      threads: props && props.threads ? props.threads : 1,
+      action:  props && props.action ? props.action : 'mail/autocomplete',
+      postdata: { _search:q, _source:'%s' },
+      lock: this.display_message(this.get_label('searching'), 'loading')
+    });
 
-    this.ksearch_data = {id: reqid, sources: sources.slice(), action: action,
-      locks: [], requests: [], num: sources.length};
-
-    for (i=0; i<threads; i++) {
-      source = this.ksearch_data.sources.shift();
-      if (threads > 1 && source === undefined)
-        break;
-
-      post_data._source = source ? source : '';
-      lock = this.display_message(this.get_label('searching'), 'loading');
-      xhr = this.http_post(action, post_data, lock);
-
-      this.ksearch_data.locks.push(lock);
-      this.ksearch_data.requests.push(xhr);
-    }
+    this.ksearch_data = { id:reqid, sources:sources.slice(), num:sources.length };
   };
 
   this.ksearch_query_results = function(results, search, reqid)
   {
+    // trigger multi-thread http response callback
+    this.multi_thread_http_response(results, reqid);
+
     // search stopped in meantime?
     if (!this.ksearch_value)
       return;
@@ -4405,7 +4397,6 @@
     // display search results
     var i, len, ul, li, text, init,
       value = this.ksearch_value,
-      data = this.ksearch_data,
       maxlen = this.env.autocomplete_max ? this.env.autocomplete_max : 15;
 
     // create results pane if not present
@@ -4459,27 +4450,8 @@
     if (len)
       this.env.contacts = this.env.contacts.concat(results);
 
-    // run next parallel search
-    if (data.id == reqid) {
-      data.num--;
-      if (maxlen > 0 && data.sources.length) {
-        var lock, xhr, source = data.sources.shift(), post_data;
-        if (source) {
-          post_data = {_search: value, _id: reqid, _source: source};
-          lock = this.display_message(this.get_label('searching'), 'loading');
-          xhr = this.http_post(data.action, post_data, lock);
-
-          this.ksearch_data.locks.push(lock);
-          this.ksearch_data.requests.push(xhr);
-        }
-      }
-      else if (!maxlen) {
-        if (!this.ksearch_msg)
-          this.ksearch_msg = this.display_message(this.get_label('autocompletemore'));
-        // abort pending searches
-        this.ksearch_abort();
-      }
-    }
+    if (this.ksearch_data.id == reqid)
+      this.ksearch_data.num--;
   };
 
   this.ksearch_click = function(node)
@@ -4514,7 +4486,8 @@
   // Clears autocomplete data/requests
   this.ksearch_destroy = function()
   {
-    this.ksearch_abort();
+    if (this.ksearch_data)
+      this.multi_thread_request_abort(this.ksearch_data.id);
 
     if (this.ksearch_info)
       this.hide_message(this.ksearch_info);
@@ -4525,18 +4498,6 @@
     this.ksearch_data = null;
     this.ksearch_info = null;
     this.ksearch_msg = null;
-  }
-
-  // Aborts pending autocomplete requests
-  this.ksearch_abort = function()
-  {
-    var i, len, ac = this.ksearch_data;
-
-    if (!ac)
-      return;
-
-    for (i=0, len=ac.locks.length; i<len; i++)
-      this.abort_request({request: ac.requests[i], lock: ac.locks[i]});
   };
 
 
@@ -5048,6 +5009,7 @@
   {
     var key = 'G'+prop.source+prop.id;
     if (this.treelist.remove(key)) {
+      this.triggerEvent('group_delete', { source:prop.source, id:prop.id });
       delete this.env.contactfolders[key];
       delete this.env.contactgroups[key];
     }
@@ -5625,14 +5587,15 @@
 
     this.subscription_list = new rcube_list_widget(this.gui_objects.subscriptionlist,
       {multiselect:false, draggable:true, keyboard:false, toggleselect:true});
-    this.subscription_list.addEventListener('select', function(o){ p.subscription_select(o); });
-    this.subscription_list.addEventListener('dragstart', function(o){ p.drag_active = true; });
-    this.subscription_list.addEventListener('dragend', function(o){ p.subscription_move_folder(o); });
-    this.subscription_list.row_init = function (row) {
-      row.obj.onmouseover = function() { p.focus_subscription(row.id); };
-      row.obj.onmouseout = function() { p.unfocus_subscription(row.id); };
-    };
-    this.subscription_list.init();
+    this.subscription_list
+      .addEventListener('select', function(o){ p.subscription_select(o); })
+      .addEventListener('dragstart', function(o){ p.drag_active = true; })
+      .addEventListener('dragend', function(o){ p.subscription_move_folder(o); })
+      .addEventListener('initrow', function (row) {
+        row.obj.onmouseover = function() { p.focus_subscription(row.id); };
+        row.obj.onmouseout = function() { p.unfocus_subscription(row.id); };
+      })
+      .init();
 
     $('#mailboxroot')
       .mouseover(function(){ p.focus_subscription(this.id); })
@@ -5757,19 +5720,23 @@
       .prop({checked: subscribed ? true : false, disabled: is_protected ? true : false});
 
     // add to folder/row-ID map
-    this.env.subscriptionrows[id] = [name, display_name, 0];
+    this.env.subscriptionrows[id] = [name, display_name, false];
 
     // sort folders (to find a place where to insert the row)
     // replace delimiter with \0 character to fix sorting
     // issue where 'Abc Abc' would be placed before 'Abc/def'
     var replace_from = RegExp(RegExp.escape(this.env.delimiter), 'g'),
       replace_to = String.fromCharCode(0);
+
     $.each(this.env.subscriptionrows, function(k,v) {
-      var n = v[0];
-      n = n.replace(replace_from, replace_to);
-      v.push(n);
+      if (v.length < 4) {
+        var n = v[0];
+        n = n.replace(replace_from, replace_to);
+        v.push(n);
+      }
       folders.push(v);
     });
+
     folders.sort(function(a, b) {
       var len = a.length - 1; n1 = a[len], n2 = b[len];
       return n1 < n2 ? -1 : 1;
@@ -5828,8 +5795,11 @@
   // 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)
   {
-    if (!this.gui_objects.subscriptionlist)
+    if (!this.gui_objects.subscriptionlist) {
+      if (this.is_framed)
+        return parent.rcmail.replace_folder_row(oldfolder, newfolder, display_name, is_protected, class_name);
       return false;
+    }
 
     var i, n, len, name, dispname, oldrow, tmprow, row, level,
       tbody = this.gui_objects.subscriptionlist.tBodies[0],
@@ -5839,6 +5809,13 @@
       subscribed = $('input[name="_subscribed[]"]', $('#'+id)).prop('checked'),
       // find subfolders of renamed folder
       list = this.get_subfolders(oldfolder);
+
+    // no renaming, only update class_name
+    if (oldfolder == newfolder) {
+      $('#'+id).attr('class', class_name || '');
+      this.subscription_list.focus();
+      return;
+    }
 
     // replace an existing table row
     this._remove_folder_row(id);
@@ -6456,6 +6433,12 @@
     this.env.quota_content = content;
   };
 
+  // update trash folder state
+  this.set_trash_count = function(count)
+  {
+    this[(count ? 'un' : '') + 'mark_folder'](this.env.trash_mailbox, 'empty', '', true);
+  };
+
   // update the mailboxlist
   this.set_unread_count = function(mbox, count, set_title, mark)
   {
@@ -6560,6 +6543,105 @@
     $(elem).removeClass('hide-headers').addClass('show-headers');
     $(this.gui_objects.all_headers_row).hide();
     elem.onclick = function() { rcmail.command('show-headers', '', elem); };
+  };
+
+  // create folder selector popup, position and display it
+  this.folder_selector = function(obj, callback)
+  {
+    var container = this.folder_selector_element;
+
+    if (!container) {
+      var rows = [],
+        delim = this.env.delimiter,
+        ul = $('<ul class="toolbarmenu iconized">'),
+        li = document.createElement('li'),
+        link = document.createElement('a'),
+        span = document.createElement('span');
+
+      container = $('<div id="folder-selector" class="popupmenu"></div>');
+      link.href = '#';
+      link.className = 'icon';
+
+      // loop over sorted folders list
+      $.each(this.env.mailboxes_list, function() {
+        var tmp, n = 0, s = 0,
+          folder = ref.env.mailboxes[this],
+          id = folder.id,
+          a = link.cloneNode(false), row = li.cloneNode(false);
+
+        if (folder.virtual)
+          a.className += ' virtual';
+        else {
+          a.className += ' active';
+          a.onclick = function() { container.hide().data('callback')(folder.id); };
+        }
+
+        if (folder['class'])
+          a.className += ' ' + folder['class'];
+
+        // calculate/set indentation level
+        while ((s = id.indexOf(delim, s)) >= 0) {
+          n++; s++;
+        }
+        a.style.paddingLeft =  n ? (n * 16) + 'px' : 0;
+
+        // add folder name element
+        tmp = span.cloneNode(false);
+        $(tmp).text(folder.name);
+        a.appendChild(tmp);
+
+        row.appendChild(a);
+        rows.push(row);
+      });
+
+      ul.append(rows).appendTo(container);
+
+      // temporarily show element to calculate its size
+      container.css({left: '-1000px', top: '-1000px'})
+        .appendTo($('body')).show();
+
+      // set max-height if the list is long
+      if (rows.length > 10)
+        container.css('max-height', $('li', container)[0].offsetHeight * 10 + 9)
+
+      // hide selector on click out of selector element
+      var fn = function(e) { if (e.target != container.get(0)) container.hide(); };
+      $(document.body).on('mouseup', fn);
+      $('iframe').contents().on('mouseup', fn)
+        .load(function(e) { try { $(this).contents().on('mouseup', fn); } catch(e) {}; });
+
+      this.folder_selector_element = container;
+    }
+
+    // position menu on the screen
+    this.element_position(container, obj);
+
+    container.show().data('callback', callback);
+  };
+
+  // position a menu element on the screen in relation to other object
+  this.element_position = function(element, obj)
+  {
+    var obj = $(obj), win = $(window),
+      width = obj.width(),
+      height = obj.height(),
+      win_height = win.height(),
+      elem_height = $(element).height(),
+      elem_width = $(element).width(),
+      pos = obj.offset(),
+      top = pos.top,
+      left = pos.left + width;
+
+    if (top + elem_height > win_height) {
+      top -= elem_height - height;
+      if (top < 0)
+        top = Math.max(0, (win_height - elem_height) / 2);
+    }
+
+    if (left + elem_width > win.width())
+      left -= elem_width + width;
+
+    element.css({left: left + 'px', top: top + 'px'});
   };
 
 
@@ -6831,6 +6913,16 @@
 
       case 'refresh':
       case 'check-recent':
+        // update message flags
+        $.each(this.env.recent_flags || {}, function(uid, flags) {
+          ref.set_message(uid, 'deleted', flags.deleted);
+          ref.set_message(uid, 'replied', flags.answered);
+          ref.set_message(uid, 'unread', !flags.seen);
+          ref.set_message(uid, 'forwarded', flags.forwarded);
+          ref.set_message(uid, 'flagged', flags.flagged);
+        });
+        delete this.env.recent_flags;
+
       case 'getunread':
       case 'search':
         this.env.qsearch = null;
@@ -6843,7 +6935,6 @@
 
           if ((response.action == 'list' || response.action == 'search') && this.message_list) {
             this.msglist_select(this.message_list);
-            this.message_list.resize();
             this.triggerEvent('listupdate', { folder:this.env.mailbox, rowcount:this.message_list.rowcount });
           }
         }
@@ -6854,7 +6945,6 @@
             this.enable_command('search-create', this.env.source == '');
             this.enable_command('search-delete', this.env.search_id);
             this.update_group_commands();
-            this.contact_list.resize();
             this.triggerEvent('listupdate', { folder:this.env.source, rowcount:this.contact_list.rowcount });
           }
         }
@@ -6929,6 +7019,130 @@
 
     if (this.submit_timer)
       clearTimeout(this.submit_timer);
+  };
+
+  /**
+   Send multi-threaded parallel HTTP requests to the server for a list if items.
+   The string '%' in either a GET query or POST parameters will be replaced with the respective item value.
+   This is the argument object expected: {
+       items: ['foo','bar','gna'],      // list of items to send requests for
+       action: 'task/some-action',      // Roudncube action to call
+       query: { q:'%s' },               // GET query parameters
+       postdata: { source:'%s' },       // POST data (sends a POST request if present)
+       threads: 3,                      // max. number of concurrent requests
+       onresponse: function(data){ },   // Callback function called for every response received from server
+       whendone: function(alldata){ }   // Callback function called when all requests have been sent
+   }
+  */
+  this.multi_thread_http_request = function(prop)
+  {
+    var reqid = new Date().getTime();
+
+    prop.reqid = reqid;
+    prop.running = 0;
+    prop.requests = [];
+    prop.result = [];
+    prop._items = $.extend([], prop.items);  // copy items
+
+    if (!prop.lock)
+      prop.lock = this.display_message(this.get_label('loading'), 'loading');
+
+    // add the request arguments to the jobs pool
+    this.http_request_jobs[reqid] = prop;
+
+    // start n threads
+    var item, threads = prop.threads || 1;
+    for (var i=0; i < threads; i++) {
+      item = prop._items.shift();
+      if (item === undefined)
+        break;
+
+      prop.running++;
+      prop.requests.push(this.multi_thread_send_request(prop, item));
+    }
+
+    return reqid;
+  };
+
+  // helper method to send an HTTP request with the given iterator value
+  this.multi_thread_send_request = function(prop, item)
+  {
+    var postdata, query;
+
+    // replace %s in post data
+    if (prop.postdata) {
+      postdata = {};
+      for (var k in prop.postdata) {
+        postdata[k] = String(prop.postdata[k]).replace('%s', item);
+      }
+      postdata._reqid = prop.reqid;
+    }
+    // replace %s in query
+    else if (typeof prop.query == 'string') {
+      query = prop.query.replace('%s', item);
+      query += '&_reqid=' + prop.reqid;
+    }
+    else if (typeof prop.query == 'object' && prop.query) {
+      query = {};
+      for (var k in prop.query) {
+        query[k] = String(prop.query[k]).replace('%s', item);
+      }
+      query._reqid = prop.reqid;
+    }
+
+    // send HTTP GET or POST request
+    return postdata ? this.http_post(prop.action, postdata) : this.http_request(prop.action, query);
+  };
+
+  // callback function for multi-threaded http responses
+  this.multi_thread_http_response = function(data, reqid)
+  {
+    var prop = this.http_request_jobs[reqid];
+    if (!prop || prop.running <= 0 || prop.cancelled)
+      return;
+
+    prop.running--;
+
+    // trigger response callback
+    if (prop.onresponse && typeof prop.onresponse == 'function') {
+      prop.onresponse(data);
+    }
+
+    prop.result = $.extend(prop.result, data);
+
+    // send next request if prop.items is not yet empty
+    var item = prop._items.shift();
+    if (item !== undefined) {
+      prop.running++;
+      prop.requests.push(this.multi_thread_send_request(prop, item));
+    }
+    // trigger whendone callback and mark this request as done
+    else if (prop.running == 0) {
+      if (prop.whendone && typeof prop.whendone == 'function') {
+        prop.whendone(prop.result);
+      }
+
+      this.set_busy(false, '', prop.lock);
+
+      // remove from this.http_request_jobs pool
+      delete this.http_request_jobs[reqid];
+    }
+  };
+
+  // abort a running multi-thread request with the given identifier
+  this.multi_thread_request_abort = function(reqid)
+  {
+    var prop = this.http_request_jobs[reqid];
+    if (prop) {
+      for (var i=0; prop.running > 0 && i < prop.requests.length; i++) {
+        if (prop.requests[i].abort)
+          prop.requests[i].abort();
+      }
+
+      prop.running = 0;
+      prop.cancelled = true;
+      this.set_busy(false, '', prop.lock);
+    }
   };
 
   // post the given form to a hidden iframe
@@ -7156,13 +7370,18 @@
 
     if (this.gui_objects.mailboxlist)
       params._folderlist = 1;
-    if (this.gui_objects.messagelist)
-      params._list = 1;
     if (this.gui_objects.quotadisplay)
       params._quota = 1;
     if (this.env.search_request)
       params._search = this.env.search_request;
 
+    if (this.gui_objects.messagelist) {
+      params._list = 1;
+
+      // message uids for flag updates check
+      params._uids = $.map(this.message_list.rows, function(row, uid) { return uid; }).join(',');
+    }
+
     return params;
   };
 

--
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