148 lines
4.1 KiB
Lua
148 lines
4.1 KiB
Lua
----------------------------------------------------------------------------
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--- Theme library.
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--
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-- @author Damien Leone <damien.leone@gmail.com>
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-- @author Julien Danjou <julien@danjou.info>
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-- @copyright 2008-2009 Damien Leone, Julien Danjou
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-- @release @AWESOME_VERSION@
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-- @module beautiful
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----------------------------------------------------------------------------
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-- Grab environment
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local os = os
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local print = print
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local pcall = pcall
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local pairs = pairs
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local type = type
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local dofile = dofile
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local setmetatable = setmetatable
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local util = require("awful.util")
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local lgi = require("lgi")
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local cairo = lgi.cairo
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local Pango = lgi.Pango
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local PangoCairo = lgi.PangoCairo
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local capi =
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{
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screen = screen,
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awesome = awesome
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}
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local xresources = require("beautiful.xresources")
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local beautiful = { xresources = xresources, mt = {} }
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-- Local data
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local theme = {}
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local descs = setmetatable({}, { __mode = 'k' })
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local fonts = setmetatable({}, { __mode = 'v' })
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local active_font
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--- Load a font name
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--
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-- @param name Font name, which can be a string or a table
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local function load_font(name)
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name = name or active_font
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if name and type(name) ~= "string" and descs[name] then
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name = descs[name]
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end
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if fonts[name] then
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return fonts[name]
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end
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-- Load new font
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local desc = Pango.FontDescription.from_string(name)
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local ctx = PangoCairo.font_map_get_default():create_context()
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ctx:set_resolution(beautiful.xresources.get_dpi())
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-- Apply default values from the context (e.g. a default font size)
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desc:merge(ctx:get_font_description(), false)
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-- Calculate font height.
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local metrics = ctx:get_metrics(desc, nil)
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local height = math.ceil((metrics:get_ascent() + metrics:get_descent()) / Pango.SCALE)
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local font = { name = name, description = desc, height = height }
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fonts[name] = font
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descs[desc] = name
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return font
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end
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--- Set an active font
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--
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-- @param name The font
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local function set_font(name)
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active_font = load_font(name).name
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end
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--- Get a font description
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--
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-- @param name The name of the font
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function beautiful.get_font(name)
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return load_font(name).description
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end
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--- Get the heigh of a font
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--
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-- @param name Name of the font
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function beautiful.get_font_height(name)
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return load_font(name).height
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end
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--- Init function, should be runned at the beginning of configuration file.
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-- @tparam string|table config The theme to load. It can be either the path to
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-- the theme file (returning a table) or directly the table
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-- containing all the theme values.
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function beautiful.init(config)
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if config then
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local success
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local homedir = os.getenv("HOME")
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-- If config is the path to the theme file,
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-- run this file,
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-- else if it is the theme table, save it
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if type(config) == 'string' then
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-- Expand the '~' $HOME shortcut
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config = config:gsub("^~/", homedir .. "/")
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success, theme = pcall(function() return dofile(config) end)
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elseif type(config) == 'table' then
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success = true
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theme = config
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end
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if not success then
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return print("E: beautiful: error loading theme file " .. theme)
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elseif theme then
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-- expand '~'
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if homedir then
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for k, v in pairs(theme) do
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if type(v) == "string" then theme[k] = v:gsub("^~/", homedir .. "/") end
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end
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end
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if theme.font then set_font(theme.font) end
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else
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return print("E: beautiful: error loading theme file " .. config)
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end
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else
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return print("E: beautiful: error loading theme: no theme specified")
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end
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end
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--- Get the current theme.
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--
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-- @treturn table The current theme table.
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function beautiful.get()
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return theme
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end
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function beautiful.mt:__index(k)
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return theme[k]
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end
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-- Set the default font
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set_font("sans 8")
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return setmetatable(beautiful, beautiful.mt)
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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