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swaybar-protocol(7) Miscellaneous Information Manual swaybar-protocol(7)

NAME

swaybar-protocol - JSON status line protocol for swaybar

SUMMARY

swaybar defines the following JSON protocol to specify what information is displayed in the status line on the right side of swaybar. The protocol comprises a header, that is a JSON object, followed by a newline (0x0A), followed by an infinite JSON array that represents the information to display. All communication is done by writing the status line to standard output and reading events from standard input.

HEADER

The header is a JSON object with support for the following properties (only version is required):
PROPERTY DATA TYPE DEFAULT DESCRIPTION
version integer - The protocol version to use. Currently, this must be 1
click_events boolean false Whether to receive click event information to standard input
cont_signal integer SIGCONT The signal that swaybar should send to continue processing
stop_signal integer SIGSTOP The signal that swaybar should send to stop processing

MINIMAL HEADER

{
	"version": 1
}
{
	"version": 1,
	"click_events": true,
	"cont_signal": 18,
	"stop_signal": 19
}

BODY

The body is an infinite array, where each element of the array is a representation of the status line at the time that the element was written. Each element of the array is itself an array of JSON objects, where each object represents a block in the status line. Each block can have the following properties (only full_text is required):

PROPERTY DATA TYPE DESCRIPTION
full_text string The text that will be displayed. If missing, the block will be skipped.
short_text string If given and the text needs to be shortened due to space, this will be displayed instead of full_text
color string The text color to use in #RRGGBBAA or #RRGGBB notation
background string The background color for the block in #RRGGBBAA or #RRGGBB notation
border string The border color for the block in #RRGGBBAA or #RRGGBB notation
border_top integer The height in pixels of the top border. The default is 1
border_bottom integer The height in pixels of the bottom border. The default is 1
border_left integer The width in pixels of the left border. The default is 1
border_right integer The width in pixels of the right border. The default is 1
min_width integer or string The minimum width to use for the block. This can either be given in pixels or a string can be given to allow for it to be calculated based on the width of the string.
align string If the text does not span the full width of the block, this specifies how the text should be aligned inside of the block. This can be left (default), right, or center.
name string A name for the block. This is only used to identify the block for click events. If set, each block should have a unique name and instance pair.
instance string The instance of the name for the block. This is only used to identify the block for click events. If set, each block should have a unique name and instance pair.
urgent boolean Whether the block should be displayed as urgent. Currently swaybar utilizes the colors set in the sway config for urgent workspace buttons. See sway-bar(5) for more information on bar color configuration.
separator boolean Whether the bar separator should be drawn after the block. See sway-bar(5) for more information on how to set the separator text.
separator_block_width integer The amount of pixels to leave blank after the block. The separator text will be displayed centered in this gap. The default is 9 pixels.
markup string The type of markup to use when parsing the text for the block. This can either be pango or none (default).

Other properties may be given and swaybar will ignore any property that it does not know. It is recommended to prefix any custom properties with an underscore to make it easier to distinguish them from protocol properties.

BODY EXAMPLE

[
	[
		{
			"full_text": "25%",
			"min_width": "100%",
			"urgent": false
		},
		{
			"full_text": "Thu 30 May 2019 02:15:15"
		}
	],
	[
		{
			"full_text": "20%",
			"min_width": "100%",
			"urgent": false
		},
		{
			"full_text": "Thu 30 May 2019 02:20:52"
		}
	],
	[
		{
			"full_text": "15%",
			"min_width": "100%",
			"urgent": true
		},
		{
			"full_text": "Thu 30 May 2019 02:25:41"
		}
	],
	...

FULL BLOCK EXAMPLE

{
	"full_text": "Thu 30 May 2019 02:09:15",
	"short_text": "02:09",
	"color": "#ccccccff",
	"background": "#111111ff",
	"border": "#222222ff",
	"border_top": 1,
	"border_bottom": 1,
	"border_left": 1,
	"border_right": 1,
	"min_width": 100,
	"align": "center",
	"name": "clock",
	"instance": "edt",
	"urgent": false,
	"separator": true,
	"separator_block_width": 5,
	"markup": "none"
}

CLICK EVENTS

If requested in the header, swaybar will write a JSON object, that can be read from standard in, when the user clicks on a block. The event object will have the following properties:

PROPERTY DATA TYPE DESCRIPTION
name string The name of the block, if set
instance string The instance of the block, if set
x integer The x location that the click occurred at
y integer The y location that the click occurred at
button integer The x11 button number for the click. If the button does not have an x11 button mapping, this will be 0.
event integer The event code that corresponds to the button for the click
relative_x integer The x location of the click relative to the top-left of the block
relative_y integer The y location of the click relative to the top-left of the block
width integer The width of the block in pixels
height integer The height of the block in pixels

Differences from i3bar's protocol:

button may be 0 for buttons that do not have x11 button mappings
event has been introduced to allow for non-x11 buttons to be represented
•The modifiers property is not currently added by swaybar

EXAMPLE

{
	"name": "clock",
	"instance": "edt",
	"x": 1900,
	"y": 10,
	"button": 1,
	"event": 274,
	"relative_x": 100,
	"relative_y": 8,
	"width": 120,
	"height": 18
}

SEE ALSO

sway-bar(5)
2021-04-27