diff --git a/README.md b/README.md
index 073bb36..8e1534a 100644
--- a/README.md
+++ b/README.md
@@ -37,9 +37,9 @@
 
 ## Introduction ([中文](/README_zh.md))
 
-LTUI is a cross-platform terminal ui library based on Lua. 
+LTUI is a cross-platform terminal ui library based on Lua.
 
-This framework originated from the requirements of graphical menu configuration in [xmake](https://github.com/xmake-io/xmake). 
+This framework originated from the requirements of graphical menu configuration in [xmake](https://github.com/xmake-io/xmake).
 Similar to the linux kernel's menuconf to configure the compilation parameters, so using curses and lua to implement a cross-platform character terminal ui library.
 
 Refer to kconfig-frontends for style rendering. Of course, users can customize different ui styles.
@@ -113,13 +113,13 @@ end
 demo:run()
 ```
 
-#### Label 
+#### Label
 
 ```lua
 local lab = label:new("title", rect {0, 0, 12, 1}, "hello ltui!"):textattr_set("white")
 ```
 
-#### Button 
+#### Button
 
 ```lua
 local btn = button:new("yes", rect {0, 1, 7, 2}, "< Yes >"):textattr_set("white")
diff --git a/rockspec/ltui-2.7-1.rockspec b/rockspec/ltui-2.8-1.rockspec
similarity index 96%
rename from rockspec/ltui-2.7-1.rockspec
rename to rockspec/ltui-2.8-1.rockspec
index 4e79bb2..a55f89f 100644
--- a/rockspec/ltui-2.7-1.rockspec
+++ b/rockspec/ltui-2.8-1.rockspec
@@ -1,8 +1,8 @@
 package = "ltui"
-version = "2.7-1"
+version = "2.8-1"
 source = {
     url = "git://github.com/tboox/ltui",
-    tag = "v2.7"
+    tag = "v8.7"
 }
 description = {
     detailed = [[
@@ -34,7 +34,7 @@ build = {
             ["ltui.action"] = "src/ltui/action.lua",
             ["ltui.application"] = "src/ltui/application.lua",
             ["ltui.base.bit"] = "src/ltui/base/bit.lua",
-            ["ltui.base.dlist"] = "src/ltui/base/dlist.lua",
+            ["ltui.base.list"] = "src/ltui/base/list.lua",
             ["ltui.base.log"] = "src/ltui/base/log.lua",
             ["ltui.base.os"] = "src/ltui/base/os.lua",
             ["ltui.base.path"] = "src/ltui/base/path.lua",
diff --git a/src/ltui/base/dlist.lua b/src/ltui/base/list.lua
similarity index 76%
rename from src/ltui/base/dlist.lua
rename to src/ltui/base/list.lua
index adcc8d4..498581e 100644
--- a/src/ltui/base/dlist.lua
+++ b/src/ltui/base/list.lua
@@ -15,41 +15,26 @@
 -- Copyright (C) 2015-2020, TBOOX Open Source Group.
 --
 -- @author      ruki
--- @file        dlist.lua
+-- @file        list.lua
 --
 
 -- load modules
 local object = require("ltui/object")
 
 -- define module
-local dlist = dlist or object { _init = {"_length"} } {0}
+local list = list or object { _init = {"_length"} } {0}
 
 -- clear list
-function dlist:clear()
+function list:clear()
     self._length = 0
     self._first  = nil
     self._last   = nil
 end
 
--- push item to tail
-function dlist:push(t)
-    assert(t)
-    if self._last then
-        self._last._next = t
-        t._prev = self._last
-        self._last = t
-    else
-        self._first = t
-        self._last = t
-    end
-    self._length = self._length + 1
-end
-
 -- insert item after the given item
-function dlist:insert(t, after)
-    assert(t)
+function list:insert(t, after)
     if not after then
-        return self:push(t)
+        return self:insert_last(t)
     end
     assert(t ~= after)
     if after._next then
@@ -63,41 +48,8 @@ function dlist:insert(t, after)
     self._length = self._length + 1
 end
 
--- pop item from tail
-function dlist:pop()
-    if not self._last then return end
-    local t = self._last
-    if t._prev then
-        t._prev._next = nil
-        self._last = t._prev
-        t._prev = nil
-    else
-        self._first = nil
-        self._last = nil
-    end
-    self._length = self._length - 1
-    return t
-end
-
--- shift item: 1 2 3 <- 2 3
-function dlist:shift()
-    if not self._first then return end
-    local t = self._first
-    if t._next then
-        t._next._prev = nil
-        self._first = t._next
-        t._next = nil
-    else
-        self._first = nil
-        self._last = nil
-    end
-    self._length = self._length - 1
-    return t
-end
-
--- unshift item: 1 2 -> t 1 2
-function dlist:unshift(t)
-    assert(t)
+-- insert the first item in head
+function list:insert_first(t)
     if self._first then
         self._first._prev = t
         t._next = self._first
@@ -109,9 +61,21 @@ function dlist:unshift(t)
     self._length = self._length + 1
 end
 
+-- insert the last item in tail
+function list:insert_last(t)
+    if self._last then
+        self._last._next = t
+        t._prev = self._last
+        self._last = t
+    else
+        self._first = t
+        self._last = t
+    end
+    self._length = self._length + 1
+end
+
 -- remove item
-function dlist:remove(t)
-    assert(t)
+function list:remove(t)
     if t._next then
         if t._prev then
             t._next._prev = t._prev
@@ -136,18 +100,74 @@ function dlist:remove(t)
     return t
 end
 
+-- remove the first item
+function list:remove_first()
+    if not self._first then
+        return
+    end
+    local t = self._first
+    if t._next then
+        t._next._prev = nil
+        self._first = t._next
+        t._next = nil
+    else
+        self._first = nil
+        self._last = nil
+    end
+    self._length = self._length - 1
+    return t
+end
+
+-- remove last item
+function list:remove_last()
+    if not self._last then
+        return
+    end
+    local t = self._last
+    if t._prev then
+        t._prev._next = nil
+        self._last = t._prev
+        t._prev = nil
+    else
+        self._first = nil
+        self._last = nil
+    end
+    self._length = self._length - 1
+    return t
+end
+
+-- push item to tail
+function list:push(t)
+    self:insert_last(t)
+end
+
+-- pop item from tail
+function list:pop()
+    self:remove_last()
+end
+
+-- shift item: 1 2 3 <- 2 3
+function list:shift()
+    self:remove_first()
+end
+
+-- unshift item: 1 2 -> t 1 2
+function list:unshift(t)
+    self:insert_first(t)
+end
+
 -- get first item
-function dlist:first()
+function list:first()
     return self._first
 end
 
 -- get last item
-function dlist:last()
+function list:last()
     return self._last
 end
 
 -- get next item
-function dlist:next(last)
+function list:next(last)
     if last then
         return last._next
     else
@@ -156,7 +176,7 @@ function dlist:next(last)
 end
 
 -- get the previous item
-function dlist:prev(last)
+function list:prev(last)
     if last then
         return last._prev
     else
@@ -165,45 +185,42 @@ function dlist:prev(last)
 end
 
 -- get list size
-function dlist:size()
+function list:size()
     return self._length
 end
 
 -- is empty?
-function dlist:empty()
+function list:empty()
     return self:size() == 0
 end
 
 -- get items
 --
--- .e.g
+-- e.g.
 --
--- for item in dlist:items() do
+-- for item in list:items() do
 --     print(item)
 -- end
 --
-function dlist:items()
-
-    -- init iterator
+function list:items()
     local iter = function (list, item)
         return list:next(item)
     end
-
-    -- return iterator and initialized state
     return iter, self, nil
 end
 
 -- get reverse items
-function dlist:ritems()
-
-    -- init iterator
+function list:ritems()
     local iter = function (list, item)
         return list:prev(item)
     end
-
-    -- return iterator and initialized state
     return iter, self, nil
 end
 
--- return module: dlist
-return dlist
+-- new list
+function list.new()
+    return list()
+end
+
+-- return module: list
+return list
diff --git a/src/ltui/panel.lua b/src/ltui/panel.lua
index 87c22dd..47df195 100644
--- a/src/ltui/panel.lua
+++ b/src/ltui/panel.lua
@@ -25,7 +25,7 @@ local rect   = require("ltui/rect")
 local event  = require("ltui/event")
 local point  = require("ltui/point")
 local curses = require("ltui/curses")
-local dlist  = require("ltui/base/dlist")
+local list   = require("ltui/base/list")
 local action = require("ltui/action")
 
 -- define module
@@ -44,7 +44,7 @@ function panel:init(name, bounds)
     self:option_set("selectable", true)
 
     -- init child views
-    self._VIEWS = dlist()
+    self._VIEWS = list()
 
     -- init views cache
     self._VIEWS_CACHE = {}