awesome/.config/awesome/lain/util/init.lua
--[[
Lain
Layouts, widgets and utilities for Awesome WM
Utilities section
Licensed under GNU General Public License v2
* (c) 2013, Luke Bonham
* (c) 2010-2012, Peter Hofmann
--]]
local awful = require("awful")
local beautiful = require("beautiful")
local math = { sqrt = math.sqrt }
local mouse = mouse
local pairs = pairs
local string = { gsub = string.gsub }
local client = client
local screen = screen
local tonumber = tonumber
local wrequire = require("lain.helpers").wrequire
local setmetatable = setmetatable
-- Lain utilities submodule
-- lain.util
local util = { _NAME = "lain.util" }
-- Like awful.menu.clients, but only show clients of currently selected
-- tags.
function util.menu_clients_current_tags(menu, args)
-- List of currently selected tags.
local cls_tags = awful.tag.selectedlist(mouse.screen)
-- Final list of menu items.
local cls_t = {}
if cls_tags == nil then return nil end
-- For each selected tag get all clients of that tag and add them to
-- the menu. A click on a menu item will raise that client.
for i = 1,#cls_tags
do
local t = cls_tags[i]
local cls = t:clients()
for k, c in pairs(cls)
do
cls_t[#cls_t + 1] = { awful.util.escape(c.name) or "",
function ()
c.minimized = false
client.focus = c
c:raise()
end,
c.icon }
end
end
-- No clients? Then quit.
if #cls_t <= 0 then return nil end
-- menu may contain some predefined values, otherwise start with a
-- fresh menu.
if not menu then menu = {} end
-- Set the list of items and show the menu.
menu.items = cls_t
local m = awful.menu.new(menu)
m:show(args)
return m
end
-- Magnify a client: Set it to "float" and resize it.
function util.magnify_client(c)
if not awful.client.floating.get(c) then
awful.client.floating.set(c, true)
local mg = screen[mouse.screen].geometry
local tag = awful.tag.selected(mouse.screen)
local mwfact = awful.tag.getmwfact(tag)
local g = {}
g.width = math.sqrt(mwfact) * mg.width
g.height = math.sqrt(mwfact) * mg.height
g.x = mg.x + (mg.width - g.width) / 2
g.y = mg.y + (mg.height - g.height) / 2
c:geometry(g)
else
awful.client.floating.set(c, false)
end
end
-- Read the nice value of pid from /proc.
local function get_nice_value(pid)
local n = first_line('/proc/' .. pid .. '/stat')
if n == nil
then
-- This should not happen. But I don't want to crash, either.
return 0
end
-- Remove pid and tcomm. This is necessary because tcomm may contain
-- nasty stuff such as whitespace or additional parentheses...
n = string.gsub(n, '.*%) ', '')
-- Field number 17 now is the nice value.
fields = split(n, ' ')
return tonumber(fields[17])
end
-- To be used as a signal handler for "focus"
-- This requires beautiful.border_focus{,_highprio,_lowprio}.
function util.niceborder_focus(c)
local n = get_nice_value(c.pid)
if n == 0
then
c.border_color = beautiful.border_focus
elseif n < 0
then
c.border_color = beautiful.border_focus_highprio
else
c.border_color = beautiful.border_focus_lowprio
end
end
-- To be used as a signal handler for "unfocus"
-- This requires beautiful.border_normal{,_highprio,_lowprio}.
function util.niceborder_unfocus(c)
local n = get_nice_value(c.pid)
if n == 0
then
c.border_color = beautiful.border_normal
elseif n < 0
then
c.border_color = beautiful.border_normal_highprio
else
c.border_color = beautiful.border_normal_lowprio
end
end
-- Non-empty tag browsing
-- direction in {-1, 1} <-> {previous, next} non-empty tag
function util.tag_view_nonempty(direction, sc)
local s = sc or mouse.screen or 1
local scr = screen[s]
for i = 1, #awful.tag.gettags(s) do
awful.tag.viewidx(direction,s)
if #awful.client.visible(s) > 0 then
return
end
end
end
-- {{{ Dynamic tagging
--
-- Add a new tag
function util.add_tag(mypromptbox)
awful.prompt.run({prompt="New tag name: "}, mypromptbox[mouse.screen].widget,
function(text)
if text:len() > 0 then
props = { selected = true }
tag = awful.tag.add(new_name, props)
tag.name = text
tag:emit_signal("property::name")
end
end)
end
-- Rename current tag
-- @author: minism
function util.rename_tag(mypromptbox)
local tag = awful.tag.selected(mouse.screen)
awful.prompt.run({prompt="Rename tag: "}, mypromptbox[mouse.screen].widget,
function(text)
if text:len() > 0 then
tag.name = text
tag:emit_signal("property::name")
end
end)
end
-- Move current tag
-- pos in {-1, 1} <-> {previous, next} tag position
function util.move_tag(pos)
local tag = awful.tag.selected(mouse.screen)
local idx = awful.tag.getidx(tag)
if tonumber(pos) <= -1 then
awful.tag.move(idx - 1, tag)
else
awful.tag.move(idx + 1, tag)
end
end
-- Remove current tag (if empty)
-- Any rule set on the tag shall be broken
function util.remove_tag()
local tag = awful.tag.selected(mouse.screen)
local prevtag = awful.tag.gettags(mouse.screen)[awful.tag.getidx(tag) - 1]
awful.tag.delete(tag, prevtag)
end
--
-- }}}
-- On the fly useless gaps change
function util.useless_gaps_resize(thatmuch)
beautiful.useless_gap_width = tonumber(beautiful.useless_gap_width) + thatmuch
awful.layout.arrange(mouse.screen)
end
return setmetatable(util, { __index = wrequire })
