core/src/ffluci/menu.lua

   1 --[[
   2 FFLuCI - Menu Builder
   3
   4 Description:
   5 Collects menu building information from controllers
   6
   7 FileId:
   8 $Id$
   9
  10 License:
  11 Copyright 2008 Steven Barth <steven@midlink.org>
  12
  13 Licensed under the Apache License, Version 2.0 (the "License");
  14 you may not use this file except in compliance with the License.
  15 You may obtain a copy of the License at
  16
  17         http://www.apache.org/licenses/LICENSE-2.0
  18
  19 Unless required by applicable law or agreed to in writing, software
  20 distributed under the License is distributed on an "AS IS" BASIS,
  21 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  22 See the License for the specific language governing permissions and
  23 limitations under the License.
  24
  25 ]]--
  26 module("ffluci.menu", package.seeall)
  27
  28 require("ffluci.fs")
  29 require("ffluci.util")
  30 require("ffluci.sys")
  31
  32 -- Default modelpath
  33 modelpath = ffluci.sys.libpath() .. "/model/menu/"
  34
  35 -- Menu definition extra scope
  36 scope = {
  37         translate = function(...) return require("ffluci.i18n").translate(...) end,
  38         loadtrans = function(...) return require("ffluci.i18n").loadc(...) end,
  39         isfile    = ffluci.fs.isfile
  40 }
  41
  42 -- Local menu database
  43 local menu = nil
  44
  45 -- The current pointer
  46 local menuc = {}
  47
  48 -- Adds a menu category to the current menu and selects it
  49 function add(cat, controller, title, order)
  50         order = order or 100
  51         if not menu[cat] then
  52                 menu[cat] = {}
  53         end
  54
  55         local entry = {}
  56         entry[".descr"] = title
  57         entry[".order"] = order
  58         entry[".contr"] = controller
  59
  60         menuc = entry
  61
  62         local i = 0
  63         for k,v in ipairs(menu[cat]) do
  64                 if v[".order"] > entry[".order"] then
  65                         break
  66                 end
  67                 i = k
  68         end
  69         table.insert(menu[cat], i+1, entry)
  70
  71         return true
  72 end
  73
  74 -- Adds an action to the current menu
  75 function act(action, title)
  76         table.insert(menuc, {action = action, descr = title})
  77         return true
  78 end
  79
  80 -- Selects a menu category
  81 function sel(cat, controller)
  82         if not menu[cat] then
  83                 return nil
  84         end
  85         menuc = menu[cat]
  86
  87         local stat = nil
  88         for k,v in ipairs(menuc) do
  89                 if v[".contr"] == controller then
  90                         menuc = v
  91                         stat = true
  92                 end
  93         end
  94
  95         return stat
  96 end
  97
  98
  99 -- Collect all menu information provided in the model dir
 100 function collect()
 101         local generators = {}
 102
 103         for k, menu in pairs(ffluci.fs.dir(modelpath)) do
 104                 if menu:sub(1, 1) ~= "." then
 105                         local f = loadfile(modelpath.."/"..menu)
 106                         if f then
 107                                 table.insert(generators, f)
 108                         end
 109                 end
 110         end
 111
 112         return generators
 113 end
 114
 115 -- Parse the collected information
 116 function parse(generators)
 117         menu = {}
 118         for i, f in pairs(generators) do
 119                 local env = ffluci.util.clone(scope)
 120
 121                 env.add = add
 122                 env.sel = sel
 123                 env.act = act
 124
 125                 setfenv(f, env)
 126                 f()
 127         end
 128         return menu
 129 end
 130
 131 -- Returns the menu information
 132 function get()
 133         if not menu then
 134                 menu = parse(collect())
 135         end
 136         return menu
 137 end