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Diffstat (limited to 'lain/util/init.lua')
| -rw-r--r-- | lain/util/init.lua | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/lain/util/init.lua b/lain/util/init.lua new file mode 100644 index 0000000..ac3afec --- /dev/null +++ b/lain/util/init.lua @@ -0,0 +1,229 @@ + +--[[ + + 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 + +-- On the fly global border change +function util.global_border_resize(thatmuch) + beautiful.global_border_width = tonumber(beautiful.global_border_width) + thatmuch + awful.layout.arrange(mouse.screen) +end + +-- Check if an element exist on a table +function util.element_in_table(element, tbl) + for _, i in pairs(tbl) do + if i == element then + return true + end + end + return false +end + +return setmetatable(util, { __index = wrequire }) |