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