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|
---------------------------------------------------
-- Licensed under the GNU General Public License v2
-- * (c) 2010, Adrian C. <anrxc@sysphere.org>
-- * (c) 2009, Rémy C. <shikamaru@mandriva.org>
-- * (c) 2009, Benedikt Sauer <filmor@gmail.com>
-- * (c) 2009, Henning Glawe <glaweh@debian.org>
-- * (c) 2009, Lucas de Vries <lucas@glacicle.com>
---------------------------------------------------
-- {{{ Grab environment
local pairs = pairs
local rawget = rawget
local require = require
local tonumber = tonumber
local io = { open = io.open }
local setmetatable = setmetatable
local getmetatable = getmetatable
local string = {
upper = string.upper,
format = string.format
}
-- }}}
-- Helpers: provides helper functions for vicious widgets
-- vicious.helpers
local helpers = {}
-- {{{ Variable definitions
local scroller = {}
-- }}}
-- {{{ Helper functions
-- {{{ Loader of vicious modules
function helpers.wrequire(table, key)
local module = rawget(table, key)
return module or require(table._NAME .. "." .. key)
end
-- }}}
-- {{{ Expose path as a Lua table
function helpers.pathtotable(dir)
return setmetatable({ _path = dir },
{ __index = function(table, index)
local path = table._path .. '/' .. index
local f = io.open(path)
if f then
local s = f:read("*all")
f:close()
if s then
return s
else
local o = { _path = path }
setmetatable(o, getmetatable(table))
return o
end
end
end
})
end
-- }}}
-- {{{ Format a string with args
function helpers.format(format, args)
for var, val in pairs(args) do
format = format:gsub("$" .. (tonumber(var) and var or
var:gsub("[-+?*]", function(i) return "%"..i end)),
val)
end
return format
end
-- }}}
-- {{{ Format units to one decimal point
function helpers.uformat(array, key, value, unit)
for u, v in pairs(unit) do
array["{"..key.."_"..u.."}"] = string.format("%.1f", value/v)
end
return array
end
-- }}}
-- {{{ Escape a string
function helpers.escape(text)
local xml_entities = {
["\""] = """,
["&"] = "&",
["'"] = "'",
["<"] = "<",
[">"] = ">"
}
return text and text:gsub("[\"&'<>]", xml_entities)
end
-- }}}
-- {{{ Capitalize a string
function helpers.capitalize(text)
return text and text:gsub("([%w])([%w]*)", function(c, s)
return string.upper(c) .. s
end)
end
-- }}}
-- {{{ Truncate a string
function helpers.truncate(text, maxlen)
local txtlen = text:len()
if txtlen > maxlen then
text = text:sub(1, maxlen - 3) .. "..."
end
return text
end
-- }}}
-- {{{ Scroll through a string
function helpers.scroll(text, maxlen, widget)
if not scroller[widget] then
scroller[widget] = { i = 1, d = true }
end
local txtlen = text:len()
local state = scroller[widget]
if txtlen > maxlen then
if state.d then
text = text:sub(state.i, state.i + maxlen) .. "..."
state.i = state.i + 3
if maxlen + state.i >= txtlen then
state.d = false
end
else
text = "..." .. text:sub(state.i, state.i + maxlen)
state.i = state.i - 3
if state.i <= 1 then
state.d = true
end
end
end
return text
end
-- }}}
return helpers
-- }}}
|
