lavalauncher - Man Page

The configuration file has a simple structure. It consists of contexts and assignments.

Assignments are always inside context and have the following form.

  <variable> = <value>;

Note that the value may be quoted, causing LavaLauncher to use it as is, including all whitespace that would otherwise be stripped from the final string.

Contexts have the following form.

  <context name>
  {
  	<context content>
  }

Some Contexts must be nested as contents of other contexts.

Comments start with an octothorpe ('#').

Global settings can be configured in the "global-settings" context. The assignments which can be made in this context are as follows.

watch-config-file

Automatically reload when a change in the configuration file is detected. Can be "true" or "false". The default is "false". Behold: If the configuration file contains an error upon reload, LavaLauncher will exit.

Every "bar" context will add a bar. The configuration changes in this context make up the default configuration set of the bar. The assignments possible in this context are as follows.

alignment

Alignment of the buttons / bar. Can be "start", "center" or "end". The default is "center".

background-colour

The background colour of the bar. The default is "#000000".

border-colour

The border colour of the bar. The default is "#ffffff".

border

The border size. Expects either one integer, to set the size of all borders, or four integers, to set the individual sizes for the top, left, right and bottom border. The default border size is 1.

condition-resolution

The resolution proportions an output must have for the bar to be displayed on it. Can be either "all", "wider-than-high" or "higher-than-wide". The default is "all".

condition-scale

The scale an output must have for the bar to be displayed on it. Can be either an integer greater than zero or "all". The default is "all".

condition-transform

The rotation an output must have for the bar to be displayed on it. Can be "all", 0, 1, 2 or 3. The numerical values represent rotations of 0, 90, 180 and 270 degrees, with the exact correspondence depending on the compositor. The default is "all".

cursor-name

Name of the cursor displayed when hovering the pointer over the bar. The default cursor is "pointer". Behold: What cursors are available depends on your cursor theme.

exclusive-zone

Exclusive zone of the surface. Can be "true", "false" or "stationary". If "true", the compositor is informed that it should not obstruct the surface of LavaLauncher with other surfaces. If "false", the compositor is informed that it can place other surfaces over or under the surface of LavaLauncher. If "stationary", the compositor is informed that the surface of LavaLauncher should not be moved to accommodate other Layer-Shell surfaces and that it can freely place other surfaces over or under the surface of LavaLauncher. The default is "true". The exact implementation is compositor dependant; A compositor may choose to ignore the requested exclusive zone of surfaces.

hidden-mode

Hidden mode of the bar. Can be "never", "always" and "river-auto". Defaults to "never".

In "never" mode, the bar is never hidden.

In "always" mode, the bar is always hidden.

The "river-auto" mode works only in the river Wayland compositor. In this mode, the bar is only hidden if the output is currently occupied.

Behold: If you want a hidden bar which sits above windows on hover, you need to set the layer to "top" and the exclusive zone to "off" or "stationary".

hidden-size

Size of the invisible area where hovering with a pointer will unhide the bar if it is hidden. Defaults to 10.

icon-padding

Padding around the icons. The default 4.

indicator-active-colour

The colour of the indicator for icons being activated. The default is "#606060".

indicator-hover-colour

The colour of the indicator for icons over which the cursor hovers. The default is "#404040".

indicator-padding

Padding around the icon indicator. The default 0.

indicator-style

Style of the icon indicator. Can be "rectangle", "rounded-rectangle" and "circle". The default is "rounded-rectangle". The corner radii for "rounded-rectangle" are the same as the ones of the bar itself.

layer

Layer of the bar surface. Can be "overlay", "top", "bottom" or "background". Typically, "bottom" and "background" will be underneath regular windows, while "top" and "overlay" will be above them, however the exact placement on the z axis depends on the implementation of the compositor. The default layer is "bottom".

margin

The margin of the surface. Expects either one integer, to set the margin in all directions, or four integers, to set the individual top-, left-, right- and bottom-margins. The default margin is 0.

mode

The display mode of the bar. Can be "default", "full" or "aggressive".

In "default" mode, the bar is sized just large enough to house all the buttons. In this mode, compositors may not respect margins parallel to the bar or the exclusive zone, possibly even depending on the alignment. This is not a bug in LavaLauncher but a limitation of your compositor.

In "full" mode, the bar spans the entire length of the edge it is docked to.

The "aggressive" mode is visually identical to "normal" mode, however the surface of the bar is sized and anchored more aggressively. This mode is intended for compositors with faulty Layer-Shell implementations. If LavaLauncher is not placed at the desired location or the exclusive zone or margins parallel to the bar are ignored, this mode may help. Beware however that it allows the compositor a lot less leeway when geometrically fitting the bar onto the screen.

namespace

The namespace of the Layer-Shell surface of the bar. Some compositors may treat Layer-Shell surfaces differently based on their namespace. The default is "lhp.LavaLauncher". Note that this option only takes effect once on bar creation.

output

Name of the output on which the bar should be displayed. Output names are compositor dependant. If set to "all" or "*", LavaLauncher will display the bar on all outputs, which is the default behaviour.

position

Position of the bar. Can be "top", "right", "bottom", "left". The bar will dock to that edge of the output(s). The default position is "bottom".

radius

The radius of the corners. Expects either one integer, to set the radius of all corners, or four integers, to set the individual radii for the top-left, top-right, bottom-left and bottom-right corner. The default radius is 5. Set to 0 to disable corner roundness.

size

Size of the bar. The default size is 60.

Every "config" context will add an additional configuration set to a bar. As such, this context is a nested inside the "bar" context. It copies the values of the default configuration set, but every setting can be overridden. This is useful to change bar configuration based on conditionals, as LavaLauncher will automatically choose the first configuration set with fitting conditions. Different instances of the same bar on different outputs can use different configuration sets, but a bar has at most one instance per output and uses exactly one configuration set per instance. The assignments possible in this context are the same as for the "bar" context.

Every "button" context will add a button to a bar. As such, this context is a nested inside the "bar" context. The assignments possible in this context are as follows.

command

Sets the shell command for left-, right-, middle-click and touch interactions.

command[<bind>]

Bind a shell command to a specific interaction plus modifier combination. This combination is defined by <bind>, which is a string containing an interaction name as well as optionally one or multiple modifier names, separated by "+".

The possible interaction types are the following.

• mouse-{left, right, middle}
• mouse-{forward, backward}
• mouse-{mouse, side, extra, task, misc}
• mouse-{1 - 9}
• scroll-{up, down}
• touch

The possible modifiers are the following.

• alt
• capslock
• control
• logo (super)
• numlock
• shift

Behold: Due to the way the Layer-Shells keyboard interactivity was designed, LavaLauncher may only get send an updated modifier state when it gains keyboard focus. In some compositors this requires you to click on it, meaning that touch and scroll interactions with modifiers may not work in some compositors. This is a bug in the Layer-Shell protocol, not in LavaLauncher.

image-path

The path to an image file, which will be used as the icon of the button.

Every "spacer" context will add a spacer to a bar. As such, this context is a nested inside the "bar" context. The assignments possible in this context are as follows.

length

Length of the spacer.

Commands are executed using sh(1).

LavaLauncher understands typical backslash escape sequences.

LavaLauncher sets some environmental variables for the processes it launches. Since all commands are executed via a shell, they can be used as arguments for the commands. These variables are as follows.

$LAVALAUNCHER_OUTPUT_NAME

The name of the output the button has been clicked on.

$LAVALAUNCHER_OUTPUT_SCALE

The scale of the output the button has been clicked on.

LavaLauncher can parse hex code colours and read RGB values directly.

The supported formats are "#RRGGBB", "#RRGGBBAA", "0xRRGGBB" and "0xRRGGBBAA" for hex code colours and "rgb(rrr,ggg,bbb)" and "rgba(rrr,ggg,bbb,aaa)" for RGB colours.

Conditions are (re-)evaluated and bars created and destroyed and their active configuration set chosen accordingly whenever an outputs parameters are updated.

LavaLauncher support PNG images and, if enabled at compile time, SVG images. It is recommended to use square images.

This is a simple configuration example, demonstrating a bar with two buttons and an additional configuration set. The second button uses advanced command binds.

  global-settings
  {
  	watch-config-file = true;
  }

bar
{
	output            = eDP-1;
	position          = bottom;
	background-colour = "#202020";

	# Condition for the default configuration set.
	condition-resolution = wider-than-high;

	config
	{
		# Condition for this configuration set.
		condition-resolution = higher-than-wide;

		# Additional configuration sets copy the default configuration set,
		# but settings can be overwritten.
		position = left;
	}

	button
	{
		image-path = /path/to/image.png;
		command    = useful-script.sh;
	}

	button
	{
		image-path = /path/to/another/image.png;

		command[mouse-left]  = another-useful-script.sh;
		command[mouse-right] = another-useful-script.sh;

		command[shift+mouse-left]     = another-useful-script.sh;
		command[shift+alt+mouse-left] = another-useful-script.sh;

		# Binding commands to scroll events is nice to configure
		# things like audio volume or screen brightness
		command[scroll-up]         = volume up;
		command[scroll-down]       = volume down;
		command[shift+scroll-up]   = volume microphone-up;
		command[shift+scroll-down] = volume microphone-down;
	}
}