conky-config/main.lua

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--[[
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Boolean conventions:
0 is true, 1 is false
Module format:
LIBRARY STRUCTURE (a collection of functions/values in a table):
local M = {} -- define module-level table to return
local modname = requires 'modname'
-- import all required modules
local foo = function()
-- code
end
-- define more functions
M.foo = foo -- dump all functions into table
return M -- return entire table (use functions as modname.foo)
RENDERING MODULE STRUCTURE (only used in this module; main.lua):
local modname = requires 'modname'
-- import all required modules
local foo = function()
-- code
end
local draw = function(args)
-- drawing code that uses foo()
end
return draw -- only draw is returned (use as modname(args))
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Var names:
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- delimiters: all words separated by _ (unless camalCase)
- booleans: preceed by is_ (as in is_awesome)
- Spacial scope:
- Everything declared local by default
- reassigning to local:
- upval to local: prefix with _
- global to local: prefix with __
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- replace . with _ if callng from table
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- the only reason to do either of these is for performance, therefore
no need to localize variables that are only used during init
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- global: preceed with g_
- Temporal Scope
- init: only relevent to startup (nil'ed before first rendering loop)
- persistant: always relevent (potentially)
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- flank init vars with _
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- Mutability
- variable: lowercase
- constant: ALL_CAPS
- constants can be anything except functions
- Module Names:
- CapCamalCase
- var name is exactly the same as module name
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--]]
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local UPDATE_FREQUENCY = 1 --Hz
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_G_INIT_DATA_ = {
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UPDATE_INTERVAL = 1 / UPDATE_FREQUENCY,
LEFT_X = 32,
SECTION_WIDTH = 436,
CENTER_PAD = 20,
PANEL_HORZ_SPACING = 10,
PANEL_MARGIN_X = 20,
PANEL_MARGIN_Y = 10,
TOP_Y = 21,
SIDE_HEIGHT = 1020,
CENTER_HEIGHT = 220,
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-- silly hack, the price of a litewait language
ABS_PATH = debug.getinfo(1).source:match("@?(.*/)")
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}
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_G_INIT_DATA_.CENTER_LEFT_X = _G_INIT_DATA_.LEFT_X + _G_INIT_DATA_.SECTION_WIDTH + _G_INIT_DATA_.PANEL_MARGIN_X * 2 + _G_INIT_DATA_.PANEL_HORZ_SPACING
_G_INIT_DATA_.CENTER_RIGHT_X = _G_INIT_DATA_.CENTER_LEFT_X + _G_INIT_DATA_.SECTION_WIDTH + _G_INIT_DATA_.CENTER_PAD
_G_INIT_DATA_.CENTER_WIDTH = _G_INIT_DATA_.SECTION_WIDTH * 2 + _G_INIT_DATA_.CENTER_PAD
_G_INIT_DATA_.RIGHT_X = _G_INIT_DATA_.CENTER_LEFT_X + _G_INIT_DATA_.CENTER_WIDTH + _G_INIT_DATA_.PANEL_MARGIN_X * 2 + _G_INIT_DATA_.PANEL_HORZ_SPACING
package.path = _G_INIT_DATA_.ABS_PATH..'/?.lua;'..
_G_INIT_DATA_.ABS_PATH..'/drawing/?.lua;'..
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_G_INIT_DATA_.ABS_PATH..'/schema/?.lua;'..
_G_INIT_DATA_.ABS_PATH..'/core/func/?.lua;'..
_G_INIT_DATA_.ABS_PATH..'/core/super/?.lua;'..
_G_INIT_DATA_.ABS_PATH..'/core/widget/?.lua;'..
_G_INIT_DATA_.ABS_PATH..'/core/widget/arc/?.lua;'..
_G_INIT_DATA_.ABS_PATH..'/core/widget/text/?.lua;'..
_G_INIT_DATA_.ABS_PATH..'/core/widget/plot/?.lua;'..
_G_INIT_DATA_.ABS_PATH..'/core/widget/rect/?.lua;'..
_G_INIT_DATA_.ABS_PATH..'/core/widget/poly/?.lua;'..
_G_INIT_DATA_.ABS_PATH..'/core/widget/image/?.lua;'
conky_set_update_interval(_G_INIT_DATA_.UPDATE_INTERVAL)
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require 'cairo'
_G_Widget_ = require 'Widget'
_G_Patterns_ = require 'Patterns'
local Util = require 'Util'
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local Panel = require 'Panel'
local System = require 'System'
local Network = require 'Network'
local Processor = require 'Processor'
local FileSystem = require 'FileSystem'
local Pacman = require 'Pacman'
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local Power = require 'Power'
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local ReadWrite = require 'ReadWrite'
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local Graphics = require 'Graphics'
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local Memory = require 'Memory'
local _unrequire = function(m) package.loaded[m] = nil end
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_G_Widget_ = nil
_G_Patterns_ = nil
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_unrequire('Super')
_unrequire('Color')
_unrequire('Gradient')
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_unrequire('Widget')
_unrequire('Patterns')
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_unrequire = nil
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_G_INIT_DATA_ = nil
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local updates = -2
local __cairo_xlib_surface_create = cairo_xlib_surface_create
local __cairo_create = cairo_create
local __cairo_surface_destroy = cairo_surface_destroy
local __cairo_destroy = cairo_destroy
local __collectgarbage = collectgarbage
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local using_ac = function()
return Util.conky('${acpiacadapter AC}') == 'on-line'
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end
local current_last_log_entry = Util.execute_cmd('tail -1 /var/log/pacman.log')
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local check_if_log_changed = function()
local new_last_log_entry = Util.execute_cmd('tail -1 /var/log/pacman.log')
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if new_last_log_entry == current_last_log_entry then return 1 end
current_last_log_entry = new_last_log_entry
return 0
end
-- kept for historic reasons, if we choose to make another panel then this
-- will be useful
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local current_interface = 0
local cs_p
local uninit = 1
conky_startup = function()
cs_p = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 1920, 1080)
local cr = __cairo_create(cs_p)
Panel(cr)
uninit = nil
end
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function conky_main()
if uninit then return end
local _cw = conky_window
if not _cw then return end
local cs = __cairo_xlib_surface_create(_cw.display, _cw.drawable, _cw.visual, 1920, 1080)
local cr = __cairo_create(cs)
cairo_set_source_surface(cr, cs_p, 0, 0)
cairo_paint(cr)
updates = updates + 1
local t1 = updates % (UPDATE_FREQUENCY * 10)
local t2
local is_using_ac = using_ac()
if is_using_ac then
t2 = updates % (UPDATE_FREQUENCY * 60)
else
t2 = updates % (UPDATE_FREQUENCY * 300)
end
local log_is_changed = false
if t2 == 0 then log_is_changed = check_if_log_changed() end
-- local pt1 = os.clock()
System(cr, current_interface, log_is_changed)
Graphics(cr, current_interface)
Processor(cr, current_interface)
ReadWrite(cr, current_interface, UPDATE_FREQUENCY)
Network(cr, current_interface, UPDATE_FREQUENCY)
Pacman(cr, current_interface, log_is_changed)
FileSystem(cr, current_interface, t1)
Power(cr, current_interface, UPDATE_FREQUENCY, is_using_ac)
Memory(cr, current_interface)
-- local pt2 = os.clock() - pt1
-- print(pt2)
__cairo_surface_destroy(cs)
__cairo_destroy(cr)
__collectgarbage()
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end