lua-dbus/init.lua at master · cholin/lua-dbus · GitHub

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local dbus = {

property = {},

raw = require("lua-dbus.dbus"),

-- interface = require("lua-dbus.interface"),

signals = { system = {}, session = {} },

}

if awesome then

local function noop() end

dbus.init = noop

dbus.poll = noop

dbus.exit = noop

else

dbus.init = dbus.raw.init

dbus.poll = dbus.raw.poll

dbus.exit = dbus.raw.exit

end

function dbus.signal_handler(signal, ...)

signal.events = ((dbus.signals[signal.bus] or {})[signal.interface] or {}).events

if not signal.events then return end

for _, callback in ipairs(signal.events[signal.member] or {}) do

if type(callback) == 'table' then

callback = callback.handler

end

callback(...)

end

if signal.type == 'signal' then

for _, event in pairs(signal.events) do

if event.name == signal.member and event.owner == signal.sender then

for _, callback in ipairs(event) do

if type(callback) == 'table' then

callback = callback.handler

end

callback(...)

end

break

end

function dbus.owner(iface, callback, opts)

opts = opts or {}

return dbus.call('GetNameOwner', callback, { args = {'s', iface},

path = '/',

bus = opts.bus, type = opts.type,

destination = 'org.freedesktop.DBus',

interface = 'org.freedesktop.DBus',

})

end

function dbus.on(name, callback, opts)

if type(name) == 'table' then

name, callback, opts = '', nil, name

elseif callback and type(callback) ~= 'function' then

callback, opts = nil, callback

end

opts = opts or {}

opts.type = opts.type or "signal"

opts.bus = opts.bus or "session"

callback = callback or opts.callback

if not opts.interface then error("opts.interface is missing!") end

local signal = dbus.signals[opts.bus][opts.interface]

if not signal then

signal = {

len = 0,

type = opts.type,

interface = opts.interface,

handler = opts.handler or dbus.signal_handler,

}

if not opts.handler then signal.events = {} end

dbus.raw.connect_signal(signal.interface, signal.handler)

dbus.signals[opts.bus][signal.interface] = signal

end

if signal.events then

local evname = name

if opts.sender then

evname = evname .. opts.sender

end

local event = signal.events[evname]

if not event then

event = { name = name, match = string.format(

"type='%s',interface='%s',member='%s'",

opts.type, signal.interface, name)}

if opts.destination then

event.match = string.format(

"%s,destination='%s'",

event.match, opts.destination)

end

if opts.sender then

event.owner = opts.sender

event.match = string.format(

"sender='%s',%s",

opts.sender, event.match)

end

signal.events[evname] = event

signal.len = signal.len + 1

dbus.raw.add_match(opts.bus, event.match)

end

if callback then

if opts.origin then

table.insert(event, {

handler = callback,

origin = opts.origin,

})

else

table.insert(event, callback)

end

function dbus.off(name, callback, opts)

opts = opts or {}

opts.type = opts.type or "signal"

opts.bus = opts.bus or "session"

local signal = (dbus.signals[opts.bus] or {})[opts.interface]

if not signal or signal.type ~= opts.type then return false end

if not signal.events then

if signal.handler == callback then

dbus.raw.disconnect_signal(signal.interface, signal.handler)

dbus.signals[opts.bus][signal.interface] = nil

return true

end

return false

end

local event = signal.events[name]

if not event then return false end

for i, cb in ipairs(event) do

if type(cb) == 'table' then cb = cb.origin end

if cb == callback then

table.remove(event, i)

if #event == 0 then

dbus.raw.remove_match(opts.bus, event.match)

signal.events[name] = nil

signal.len = signal.len - 1

if signal.len == 0 then

dbus.raw.disconnect_signal(signal.interface,signal.handler)

dbus.signals[opts.bus][signal.interface] = nil

end

return true

end

return false

end

function dbus.call(name, callback, opts)

if not dbus.raw.call_method then return end

if callback and type(callback) ~= 'function' then

callback, opts = nil, callback

end

opts = opts or {}

opts.type = opts.type or "method_call"

opts.bus = opts.bus or "session"

callback = callback or opts.callback

local serial = dbus.raw.call_method(opts.bus,

opts.destination, opts.path, opts.interface, name,

unpack(opts.args or {}))

if callback and type(serial) == 'number' then

local key = string.format("reply %d", serial)

local params = {

interface = key,

type = opts.type,

bus = opts.bus,

}

params.handler = function (_, ...)

dbus.off(key, params.handler, params)

callback(...)

end

dbus.on(key, params.handler, params)

end

return serial

end

function dbus.property.get(name, callback, opts)

opts = opts or {}

opts.args = {'s', opts.interface, 's', name} -- actual arguments to Get

opts.interface = 'org.freedesktop.DBus.Properties'

callback = callback or opts.callback

return dbus.call('Get', callback, opts)

end

function dbus.property.set(name, value, opts)

opts = opts or {}

opts.args = {'s', opts.interface, 's', name, 'v', value} -- actual arguments to Get

opts.interface = 'org.freedesktop.DBus.Properties'

return dbus.call('Set', opts)

end

function dbus.property.on(name, callback, opts)

opts = opts or {}

return dbus.on('PropertiesChanged', function (iface, values)

if iface == opts.interface then

local value = values[name]

if value ~= nil then

callback(value)

end

end, {

origin = callback,

bus = opts.bus, type = opts.type,

sender = opts.sender, destination = opts.destination,

interface = 'org.freedesktop.DBus.Properties',

})

end

function dbus.property.off(name, callback, opts)

return dbus.off('PropertiesChanged', callback, {

bus = opts.bus, type = opts.type,

interface = 'org.freedesktop.DBus.Properties',

})

end

return dbus

lua-dbus/init.lua at master · cholin/lua-dbus · GitHub

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