Crate lazybar_core

This is a lightweight, event-driven status bar for EWMH-compliant window managers on X11.

It uses tokio in combination with existing event APIs to poll as rarely as possible. For example, the Inotify panel uses Linux’s inotify to monitor the contents of a file.

You’re welcome to use this crate as a library if you want to expand on the functionality included herein, but its intentended use case is as a binary. It reads a configuration file located at $XDG_CONFIG_HOME/lazybar/config.toml, and this documentation will focus on accepted syntax for that file.

The general structure of the file is as follows:

Top-level tables:

• bars: each subtable defines a bar, and the name is used as a command line argument to run that bar.
• ramps: each subtable defines a ramp with the same name, and those names are referenced by panel tables (see below).
• panels: each subtable defines a panel with the same name, and those names are referenced by bar tables.

None of these tables need to be declared explicitly, as they hold no values of their own. [bars.example] is sufficient to define a bar named example. Any values in these top level tables will be ignored, along with any top level table with a different name. See https://toml.io/ for more information.

Note: types are pretty flexible, and config will try its best to figure out what you mean, but if you have issues, make sure that your types are correct.

Example Config

[bars.example]
position = "top"
height = 36
transparent = true
bg = "#0000"
default_bg = "#0000"
default_fg = "#ccc"
default_font = "FiraMono Nerd Font Mono 10"
margin_left = 10
margin_internal = 10
margin_right = 10
panels_left = ["xwindow"]
panels_center = ["clock"]
panels_right = ["pulseaudio","separator","network","separator","battery"]

[panels.xwindow]
type = "xwindow"

[panels.pulseaudio]
type = "pulseaudio"
ramp = "pa"
muted_ramp = "pa_muted"

[panels.network]
type = "network"
if_name = "wlan0"
# if_name = "eth0"
format_connected = "<span foreground='#0ff'>%ifname%</span> %essid% %local_ip%"
format_disconnected = "<span foreground='#0ff'>%ifname%</span> <span foreground='#888'>disconnected</span>"

[panels.mpd]
type = "mpd"
progress_bar = true
max_width = 300
strategy = "scroll"
scroll_interval = 300

[panels.battery]
type = "battery"

[panels.clock]
type = "clock"
precision = "seconds"
formats = ["<span foreground='#0ff'>%Y-%m-%d %T</span>", "<span foreground='#f00'>%Y-%m-%d %T</span>"]
click-left = "cycle"

[panels.separator]
type = "separator"
format = "<span font='FiraMono Nerd Font Mono 13' foreground='#666'>  //  </span>"

[ramps.pa]
0 = "<span font_size='25pt' rise='-7.5pt'>󰕿</span> "
1 = "<span font_size='25pt' rise='-7.5pt'>󰖀</span> "
2 = "<span font_size='25pt' rise='-7.5pt'>󰕾</span> "

[ramps.pa_muted]
0 = "<span font_size='25pt' rise='-7.5pt'>󰸈</span> "
1 = "<span font_size='25pt' rise='-7.5pt'>󰖁</span> "

Re-exports

• pub use builders::BarConfig;

Modules

• bar
  The bar itself and bar-related utility structs and functions.
• builders
  Builder structs for non-panel items, courtesy of derive_builder. See panels::builders for panel builders.
• ipc
  Support for inter-process communication, like that provided by the lazybar-msg crate.
• panels
  Panels that can be added to the bar. A new panel must implement PanelConfig.
• parser
  The parser for the config.toml file.

Structs

• Actions
  A map from mouse buttons to panel events
• ActionsBuilder
  Builder for Actions.
• Attrs
  Attributes of a panel, or the defaults for the bar.
• Color
  The color
• Highlight
  Describes a bar to be drawn below a workspace name
• Margins
  Describes the minimum width of gaps around panel groups.
• PanelCommon
  The common part of most PanelConfigs. Stores format strings, Attrs, and Dependence
• PanelCommonBuilder
  Builder for PanelCommon.
• Ramp
  Utility data structure to display one of several strings based on a value in a range, like a volume icon.
• UnixStreamWrapper
  A wrapper struct to read indefinitely from a UnixStream and send the results through a channel.

Enums

• ActionsBuilderError
  Error type for ActionsBuilder
• Alignment
  Describes where on the bar a panel should appear.
• PanelCommonBuilderError
  Error type for PanelCommonBuilder
• Position
  Describes where on the screen the bar should appear.

Traits

• PanelConfig
  The trait implemented by all panels. Provides support for parsing a panel and turning it into a PanelStream.

Functions

• draw_common
  The end of a typical draw function. Takes a cairo context, a string to display, and attributes to use, and returns a closure that will do the drawing and a tuple representing the final width and height.
• get_table_from_config
  Removes a value from a given config table and returns an attempt at parsing it into a table
• markup_escape_text
• remove_array_from_config
  Removes a value from a given config table and returns an attempt at parsing it into an array
• remove_bool_from_config
  Removes a value from a given config table and returns an attempt at parsing it into a bool
• remove_color_from_config
  Removes a value from a given config table and returns an attempt at parsing it into a color
• remove_float_from_config
  Removes a value from a given config table and returns an attempt at parsing it into a float
• remove_string_from_config
  Removes a value from a given config table and returns an attempt at parsing it into a string
• remove_uint_from_config
  Removes a value from a given config table and returns an attempt at parsing it into a uint

Type Aliases

• PanelDrawFn
  A function that can be called repeatedly to draw the panel.
• PanelStream
  A stream that produces panel changes when the underlying data source changes.