222 lines
7.2 KiB
Markdown
222 lines
7.2 KiB
Markdown
## Usage
|
|
|
|
[Read here.](https://github.com/lcpz/lain/wiki/Widgets#usage)
|
|
|
|
### Description
|
|
|
|
Template for asynchronous watcher widgets.
|
|
|
|
Executes an input command and makes the user feed a `wibox.widget` with the output.
|
|
|
|
```lua
|
|
local mywatch = lain.widget.watch()
|
|
```
|
|
|
|
This has been implemented in Awesome 4.0 as [`awful.widget.watch`](https://awesomewm.org/doc/api/classes/awful.widget.watch.html). But while Awesome `watch` returns only the widget, Lain one returns a table including its timer and internal update function too.
|
|
|
|
## Input table
|
|
|
|
Variable | Meaning | Type | Default
|
|
--- | --- | --- | ---
|
|
`widget` | Widget to feed | `wibox.widget` | `wibox.widget.textbox`
|
|
`timeout` | Refresh timeout seconds | number | 5
|
|
`cmd` | The command to execute | string **or** table | `nil`
|
|
`nostart` | Widget timer doesn't start immediately | boolean | false
|
|
`stoppable` | Widget timer is stoppable | boolean | false
|
|
`settings` | User settings | function | see [Default `settings` function](https://github.com/lcpz/lain/wiki/watch#default-settings-function)
|
|
|
|
If your command needs a shell, you need to set `cmd` as an array of 3 strings, where the first contains the shell, the second contains `-c`, and the third contains the actual command. Example:
|
|
|
|
```lua
|
|
cmd = { awful.util.shell, "-c", "myactualcommand" }
|
|
```
|
|
|
|
`settings` can use the string `output`, which is the output of `cmd`.
|
|
|
|
### Default `settings` function
|
|
|
|
```lua
|
|
settings = function() widget:set_text(output) end
|
|
```
|
|
## Output table
|
|
|
|
Variable | Meaning | Type
|
|
--- | --- | ---
|
|
`widget` | The widget | input widget type or `wibox.widget.textbox`
|
|
`update` | Update `widget` | function
|
|
`timer` | The widget timer | [`gears.timer`](https://awesomewm.org/doc/api/classes/gears.timer.html) or `nil`
|
|
|
|
The `update` function can be used to refresh the widget before `timeout` expires.
|
|
|
|
If `stoppable == true`, the widget will have an ad-hoc timer, which you can control though `timer` variable.
|
|
|
|
## Use case examples
|
|
|
|
### bitcoin
|
|
|
|
```lua
|
|
-- Bitcoin to USD current price, using Coinbase V1 API
|
|
local bitcoin = lain.widget.watch({
|
|
timeout = 43200, -- half day
|
|
stoppable = true,
|
|
cmd = "curl -m5 -s 'https://coinbase.com/api/v1/prices/buy'",
|
|
settings = function()
|
|
local btc, pos, err = require("lain.util").dkjson.decode(output, 1, nil)
|
|
local btc_price = (not err and btc and btc["subtotal"]["amount"]) or "N/A"
|
|
|
|
-- customize here
|
|
widget:set_text(btc_price)
|
|
end
|
|
})
|
|
```
|
|
|
|
### btrfs
|
|
|
|
```lua
|
|
-- btrfs root df
|
|
local myrootfs = lain.widget.watch({
|
|
timeout = 600,
|
|
cmd = "btrfs filesystem df -g /",
|
|
settings = function()
|
|
local total, used = string.match(output, "Data.-total=(%d+%.%d+)GiB.-used=(%d+%.%d+)GiB")
|
|
local percent_used = math.ceil((tonumber(used) / tonumber(total)) * 100)
|
|
|
|
-- customize here
|
|
widget:set_text(" [/: " .. percent_used .. "%] ")
|
|
end
|
|
})
|
|
```
|
|
|
|
### cmus
|
|
|
|
```lua
|
|
-- cmus audio player
|
|
local cmus = lain.widget.watch({
|
|
timeout = 2,
|
|
stoppable = true,
|
|
cmd = "cmus-remote -Q",
|
|
settings = function()
|
|
local cmus_now = {
|
|
state = "N/A",
|
|
artist = "N/A",
|
|
title = "N/A",
|
|
album = "N/A"
|
|
}
|
|
|
|
for w in string.gmatch(output, "(.-)tag") do
|
|
a, b = w:match("(%w+) (.-)\n")
|
|
cmus_now[a] = b
|
|
end
|
|
|
|
-- customize here
|
|
widget:set_text(cmus_now.artist .. " - " .. cmus_now.title)
|
|
end
|
|
})
|
|
```
|
|
|
|
### maildir
|
|
|
|
```lua
|
|
-- checks whether there are files in the "new" directories of a mail dirtree
|
|
local mailpath = "~/Mail"
|
|
local mymaildir = lain.widget.watch({
|
|
timeout = 60,
|
|
stoppable = true,
|
|
cmd = { awful.util.shell, "-c", string.format("ls -1dr %s/*/new/*", mailpath) },
|
|
settings = function()
|
|
local inbox_now = { digest = "" }
|
|
|
|
for dir in output:gmatch(".-/(%w+)/new") do
|
|
inbox_now[dir] = 1
|
|
for _ in output:gmatch(dir) do
|
|
inbox_now[dir] = inbox_now[dir] + 1
|
|
end
|
|
if #inbox_now.digest > 0 then inbox_now.digest = inbox_now.digest .. ", " end
|
|
inbox_now.digest = inbox_now.digest .. string.format("%s (%d)", dir, inbox_now[dir])
|
|
end
|
|
|
|
-- customize here
|
|
widget:set_text("mail: " .. inbox_now.digest)
|
|
end
|
|
})
|
|
```
|
|
|
|
### mpris
|
|
|
|
```lua
|
|
-- infos from mpris clients such as spotify and VLC
|
|
-- based on https://github.com/acrisci/playerctl
|
|
local mpris = lain.widget.watch({
|
|
cmd = "playerctl status && playerctl metadata",
|
|
timeout = 2,
|
|
stoppable = true,
|
|
settings = function()
|
|
local escape_f = require("awful.util").escape
|
|
local mpris_now = {
|
|
state = "N/A",
|
|
artist = "N/A",
|
|
title = "N/A",
|
|
art_url = "N/A",
|
|
album = "N/A",
|
|
album_artist = "N/A"
|
|
}
|
|
|
|
mpris_now.state = string.match(output, "Playing") or
|
|
string.match(output, "Paused") or "N/A"
|
|
|
|
for k, v in string.gmatch(output, "'[^:]+:([^']+)':[%s]<%[?'([^']+)'%]?>")
|
|
do
|
|
if k == "artUrl" then mpris_now.art_url = v
|
|
elseif k == "artist" then mpris_now.artist = escape_f(v)
|
|
elseif k == "title" then mpris_now.title = escape_f(v)
|
|
elseif k == "album" then mpris_now.album = escape_f(v)
|
|
elseif k == "albumArtist" then mpris_now.album_artist = escape_f(v)
|
|
end
|
|
end
|
|
|
|
-- customize here
|
|
widget:set_text(mpris_now.artist .. " - " .. mpris_now.title)
|
|
end
|
|
})
|
|
```
|
|
|
|
### upower
|
|
|
|
```lua
|
|
-- battery infos from freedesktop upower
|
|
local mybattery = lain.widget.watch({
|
|
timeout = 30,
|
|
cmd = { awful.util.shell, "-c", "upower -i /org/freedesktop/UPower/devices/battery_BAT | sed -n '/present/,/icon-name/p'" },
|
|
settings = function()
|
|
local bat_now = {
|
|
present = "N/A",
|
|
state = "N/A",
|
|
warninglevel = "N/A",
|
|
energy = "N/A",
|
|
energyfull = "N/A",
|
|
energyrate = "N/A",
|
|
voltage = "N/A",
|
|
percentage = "N/A",
|
|
capacity = "N/A",
|
|
icon = "N/A"
|
|
}
|
|
|
|
for k, v in string.gmatch(output, '([%a]+[%a|-]+):%s*([%a|%d]+[,|%a|%d]-)') do
|
|
if k == "present" then bat_now.present = v
|
|
elseif k == "state" then bat_now.state = v
|
|
elseif k == "warning-level" then bat_now.warninglevel = v
|
|
elseif k == "energy" then bat_now.energy = string.gsub(v, ",", ".") -- Wh
|
|
elseif k == "energy-full" then bat_now.energyfull = string.gsub(v, ",", ".") -- Wh
|
|
elseif k == "energy-rate" then bat_now.energyrate = string.gsub(v, ",", ".") -- W
|
|
elseif k == "voltage" then bat_now.voltage = string.gsub(v, ",", ".") -- V
|
|
elseif k == "percentage" then bat_now.percentage = tonumber(v) -- %
|
|
elseif k == "capacity" then bat_now.capacity = string.gsub(v, ",", ".") -- %
|
|
elseif k == "icon-name" then bat_now.icon = v
|
|
end
|
|
end
|
|
|
|
-- customize here
|
|
widget:set_text("Bat: " .. bat_now.percentage .. " " .. bat_now.state)
|
|
end
|
|
})
|
|
```
|