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--[[ parse through the *.menu tables and return a "menu" table
Written for Alpine Configuration Framework (ACF) -- see www.alpinelinux.org
Copyright (C) 2007 Nathan Angelacos
Licensed under the terms of GPL2
]]--
local mymodule = {}
posix = require("posix")
format = require("acf.format")
fs = require("acf.fs")
-- returns a table of the "*.menu" tables
-- startdir should be the app dir.
local get_candidates = function (startdir)
return fs.find_files_as_array(".*%.menu", startdir, true)
end
-- Split string into priority and name, convert '_' to space
local parse_menu_entry = function (entry)
local name, priority
if (string.match(entry, "^%d")) then
priority, name = string.match(entry, "(%d+)(.*)")
else
name = entry
end
name = string.gsub(name, "_", " ")
return name, priority
end
-- Parse menu file entry, returning cat, group, tab, action and priorities
local parse_menu_line = function (line)
local result = nil
--skip comments and blank lines
if nil == (string.match(line, "^#") or string.match(line,"^$")) then
local item = {}
for i in string.gmatch(line, "%S+") do
item[#item + 1] = i
end
if #item >= 1 then
result = {}
result.cat, result.cat_prio = parse_menu_entry(item[1])
if (item[2]) then result.group, result.group_prio = parse_menu_entry(item[2]) end
if (item[3]) then result.tab = parse_menu_entry(item[3]) end
if (item[4]) then result.action = parse_menu_entry(item[4]) end
end
end
return result
end
-- Function to compare priorities, missing priority moves to the front, same priority sorted alphabetically
local prio_compare = function(x,y)
if x.priority == y.priority then
if x.name < y.name then return true end
return false
end
if nil == x.priority then return true end
if nil == y.priority then return false end
if tonumber(x.priority) < tonumber(y.priority) then return true end
return false
end
-- returns a table of all the menu items found, sorted by priority
mymodule.get_menuitems = function (self)
local cats = {}
local reversecats = {}
local foundcontrollers = {}
for p in string.gmatch(self.conf.appdir, "[^,]+") do
p = (string.gsub(p, "/$", "")) --remove trailing /
for k,filename in pairs(get_candidates(p)) do
local controller = string.gsub(posix.basename(filename), ".menu$", "")
local prefix = (string.gsub(posix.dirname(filename), p, "")).."/"
if not foundcontrollers[prefix.."/"..controller] then
foundcontrollers[prefix.."/"..controller] = true
-- open the menu file, and parse the contents
local handle = io.open(filename)
for x in handle:lines() do
local result = parse_menu_line(x)
if result then
for i = 1,1 do -- loop so break works
-- Add the category
if nil == reversecats[result.cat] then
table.insert ( cats,
{ name=result.cat,
groups = {},
reversegroups = {} } )
reversecats[result.cat] = #cats
end
local cat = cats[reversecats[result.cat]]
cat.priority = cat.priority or result.cat_prio
-- Add the group
if nil == result.group then break end
if nil == cat.groups[cat.reversegroups[result.group]] then
table.insert ( cat.groups,
{ name = result.group,
controllers = {},
reversetabs = {},
tabs = {} } )
cat.reversegroups[result.group] = #cat.groups
end
cat.groups[cat.reversegroups[result.group]].controllers[prefix..controller] = true
local group = cat.groups[cat.reversegroups[result.group]]
group.priority = group.priority or result.group_prio
-- Add the tab
if nil == result.tab or nil == result.action then break end
local tab = { name = result.tab,
controller = controller,
prefix = prefix,
action = result.action }
table.insert(group.tabs, tab)
if group.reversetabs[tab.name] then
-- Flag for two tabs of same name in different controllers
for i,t in ipairs(group.reversetabs[tab.name]) do
if group.tabs[t].controller ~= tab.controller or group.tabs[t].prefix ~= tab.prefix then
group.flag = tab.name
break
end
end
table.insert(group.reversetabs[tab.name], #group.tabs)
else
group.reversetabs[tab.name] = {#group.tabs}
end
end
end
end
handle:close()
end
end
end
-- Now that we have the entire menu, sort by priority
-- Categories first
table.sort(cats, prio_compare)
-- Then groups
for x, cat in ipairs(cats) do
-- Let's check for bad groups (multiple tabs with same name)
for y,group in ipairs(cat.groups) do
if group.flag then
-- determine the difference between prefix/controller combos (start and stop chars)
local start=0
local done = false
local first = ""
for con in pairs(group.controllers) do
first = con
break
end
while not done and start<first:len() do
start = start+1
for con in pairs(group.controllers) do
if con:sub(start,start) ~= first:sub(start,start) then
done = true
break
end
end
end
local stop=0
done = false
while not done and stop+first:len()>0 do
stop = stop-1
for con in pairs(group.controllers) do
if con:sub(stop,stop) ~= first:sub(stop,stop) then
done = true
break
end
end
end
-- create new groups for each prefix/controller
for con in pairs(group.controllers) do
table.insert ( cat.groups,
{ name = group.name..string.sub(con,start,stop),
controllers = {},
priority = group.priority,
reversetabs = {},
tabs = {} } )
cat.groups[#cat.groups].controllers[con] = true
cat.reversegroups[group.name..con] = #cat.groups
end
-- move the tabs into appropriate groups
for z,tab in ipairs(group.tabs) do
table.insert(cat.groups[cat.reversegroups[group.name..tab.prefix..tab.controller]].tabs, tab)
end
-- remove the group
group.tabs = {}
end
group.reversetabs = nil -- don't need reverse table anymore
end
cat.reversegroups = nil -- don't need reverse table anymore
table.sort(cat.groups, prio_compare)
end
return cats
end
return mymodule
|
