conky-config/drawing/compile.lua

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local pure = require 'pure'
local geom = require 'geom'
local fill_rect = require 'fill_rect'
local i_o = require 'i_o'
local system = require 'system'
local network = require 'network'
local processor = require 'processor'
local filesystem = require 'filesystem'
local pacman = require 'pacman'
local power = require 'power'
local readwrite = require 'readwrite'
local graphics= require 'graphics'
local memory = require 'memory'
local yaml = require 'lyaml'
local common = require 'common'
local reduce_modules_y = function(common_, modlist, init_x, width, acc, new)
if type(new) == "number" then
acc.next_y = acc.next_y + new
else
local m = modlist[new](common_, width, geom.make_point(init_x, acc.next_y))
local r = common_.compile_module(
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m.header,
m.point,
m.width,
m.top,
table.unpack(pure.table_array(m))
)
local update = pure.maybe(
r.update,
function(f) return function() f() r.update() end end,
m.set_state
)
table.insert(acc.fgroups, {update = update, static = r.static, dynamic = r.dynamic})
acc.next_x = math.max(acc.next_x, r.next_x)
acc.next_y = r.next_y
end
return acc
end
local reduce_modules_x = function(common_, modlist, init_y, acc, x_mods)
if type(x_mods) == "number" then
acc.next_x = acc.next_x + x_mods
else
local r = pure.reduce(
pure.partial(reduce_modules_y, common_, modlist, acc.next_x, x_mods.width),
{next_x = acc.next_x, next_y = init_y, fgroups = acc.fgroups},
x_mods.blocks
)
acc.fgroups = r.fgroups
acc.next_x = r.next_x
acc.next_y = math.max(acc.next_y, r.next_y)
end
return acc
end
local arrange_panel_modules = function(common_, modlist, point, mods)
local r = pure.reduce(
pure.partial(reduce_modules_x, common_, modlist, point.y),
{next_x = point.x, next_y = point.y, fgroups = {}},
mods
)
return {
point_ul = point,
width = r.next_x - point.x,
height = r.next_y - point.y,
update = pure.map_keys('update', r.fgroups),
static = pure.map_keys('static', r.fgroups),
dynamic = pure.map_keys('dynamic', r.fgroups),
}
end
local build_surface = function(common_, box, fs)
local panel_line_thickness = 1
-- move over by half a pixel so the lines don't need to be antialiased
local _x = box.corner.x + 0.5
local _y = box.corner.y + 0.5
local panel = common_.make_panel(_x, _y, box.width, box.height, panel_line_thickness)
local cs_x = _x - panel_line_thickness * 0.5
local cs_y = _y - panel_line_thickness * 0.5
local cs_w = box.width + panel_line_thickness
local cs_h = box.height + panel_line_thickness
local cs = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, cs_w, cs_h)
local cr = cairo_create(cs)
cairo_translate(cr, -cs_x, -cs_y)
fill_rect.draw(panel, cr)
for i = 1, #fs do
fs[i](cr)
end
cairo_destroy(cr)
return {x = cs_x, y = cs_y, s = cs}
end
local reduce_static = function(common_, mods, y, acc, panel_mods)
if type(panel_mods) == "number" then
acc.next_x = acc.next_x + panel_mods
else
local margins = panel_mods.margins
local margin_x = margins[1]
local margin_y = margins[2]
local mpoint = geom.make_point(acc.next_x + margin_x, y + margin_y)
local r = arrange_panel_modules(common_, mods, mpoint, panel_mods.columns)
local w = r.width + margin_x * 2
local h = r.height + margin_y * 2
local pbox = geom.make_box(acc.next_x, y, w, h)
acc.next_x = acc.next_x + w
acc.static = pure.flatten({acc.static, {build_surface(common_, pbox, r.static)}})
acc.update = pure.flatten({acc.update, r.update})
acc.dynamic = pure.flatten({acc.dynamic, r.dynamic})
end
return acc
end
local compile_layout = function(common_, point, mods, module_sets)
local __cairo_set_source_surface = cairo_set_source_surface
local __cairo_paint = cairo_paint
local r = pure.reduce(
pure.partial(
reduce_static,
common_,
mods,
point.y
),
{next_x = point.x, static = {}, update = {}, dynamic = {}},
module_sets
)
local cs = r.static
return {
static = function(cr)
for i = 1, #cs do
local c = cs[i]
__cairo_set_source_surface(cr, c.s, c.x, c.y)
__cairo_paint(cr)
end
end,
update = pure.sequence(table.unpack(r.update)),
dynamic = pure.sequence(table.unpack(r.dynamic)),
}
end
return function(update_interval, config_path)
local update_freq = 1 / update_interval
local config = yaml.load(i_o.read_file(config_path))
local cmods = config.modules
local main_state = {}
local mods = {
memory = pure.partial(memory, update_freq, cmods.memory),
readwrite = pure.partial(readwrite, update_freq, cmods.readwrite),
network = pure.partial(network, update_freq),
power = pure.partial(power, update_freq, cmods.power),
filesystem = pure.partial(filesystem, cmods.filesystem, main_state),
system = pure.partial(system, main_state),
graphics = pure.partial(graphics, update_freq, cmods.graphics),
processor = pure.partial(processor, update_freq, cmods.processor, main_state),
pacman = pure.partial(pacman, main_state)
}
local compiled = compile_layout(
common(config),
geom.make_point(table.unpack(config.layout.anchor)),
mods,
config.layout.panels
)
local STATS_FILE = '/tmp/.conky_pacman'
return function(cr, _updates)
main_state.trigger10 = _updates % (update_freq * 10)
main_state.pacman_stats = i_o.read_file(STATS_FILE)
compiled.static(cr)
compiled.update()
compiled.dynamic(cr)
end
end