zellij-datetime

This plugin adds a date and time pane to Zellij, a terminal workspace.

Zellij's plugin system leverages WebAssembly/WASI, and this plugin will also work with both amd64 and Arm in the same binary.

Require

Zellij 0.38.0 or later

$ zellij -V
zellij 0.38.0

Setup

Preparation of Plug-in deployment destination:

# create configuration directory
mkdir -p ~/.config/zellij/layouts/
mkdir -p ~/.config/zellij/plugins/
# If you have already created a layout file, you do not need to do the following.
# export default layout (Be careful not to overwrite your settings)
zellij setup --dump-layout default > ~/.config/zellij/layouts/default.kdl

Download zellij-datetime.wasm:

cd ~/.config/zellij/plugins/
# download datetime plugin
wget -O zellij-datetime.wasm \
    https://github.com/h1romas4/zellij-datetime/releases/latest/download/zellij-datetime.wasm

Set the full path to zellij-datetime.wasm in the ~/.config/zellij/layouts/default.kdl layouts file.

vi ~/.config/zellij/layouts/default.kdl

Example - Basic layout:

layout {
    pane size=1 borderless=true {
        plugin location="file:/home/hiromasa/.config/zellij/plugins/zellij-datetime.wasm"
    }
    pane size=1 borderless=true {
        plugin location="zellij:tab-bar"
    }
    pane
    pane size=2 borderless=true {
        plugin location="zellij:status-bar"
    }
}

Example - The same line as the other bar(s):

layout {
    pane size=1 split_direction="vertical" {
        pane size="75%" borderless=true {
            plugin location="zellij:tab-bar"
        }
        pane size="25%" borderless=true {
            plugin location="file:/home/hiromasa/.config/zellij/plugins/zellij-datetime.wasm"
        }
    }
    pane
    pane size=2 borderless=true {
        plugin location="zellij:status-bar"
    }
}

Usage

Timezone can be selected by left mouse click or scrolling.
Insert a date/time string into current pane with a right mouse click. (Require enable_right_click true plugin setting)

zellij-06.mp4

Plugin settings

layout {
    pane size=1 borderless=true {
        plugin location="file:/home/hiromasa/.config/zellij/plugins/zellij-datetime.wasm" {
            timezone1 "PDT/-9"
            timezone2 "UTC/0"
            timezone3 "CEST/+2"
            timezone4 "JST/+9"
            timezone5 "NPT/+5.75"
            default_timezone "JST"
            date_format "%Y/%m/%d %A"
            time_format "%I:%M %p"
            background_color "#0080a0"
            foreground_color "#ffffff"
            pane_color "#1e1e1e"
            enable_right_click false
            arrow_separator1 ""
            arrow_separator2 ""
            arrow_separator3 ""
            padding_adjust 0
            text_align "right"
        }
    }
}

Key	Format	Default	Note
`timezone1`	`"name/offset"`	`"UTC/0"`
`timezone[2-9]`	`"name/offset"`	-
`default_timezone`	`"name"`	`"UTC"`
`date_format`	chrono::format::strftime	`"%Y-%m-%d %a"`
`time_format`	chrono::format::strftime	`"%H:%M"`	The screen refreshes every minute.
`background_color`	`"#color"`	`"#0080a0"`
`foreground_color`	`"#color"`	`"#ffffff"`	It may be adjusted automatically depending on the `background_color`.
`pane_color`	`"#color"`	`"#1e1e1e"`
`enable_right_click`	bool	`false`	Right-clicking on the clock outputs the string format to stdin; Allow `PermissionType::WriteToStdin` permission when starting the plugin.
`arrow_separator1`	`"string"`	`""`	Delimiter string on line. Only the first character.
`arrow_separator2`	`"string"`	`""`	📅 Only the first character.
`arrow_separator3`	`"string"`	`""`	⌚ Only the first character.
`padding_adjust`	i32	`0`	It can be used to adjust left-justified padding. For example, adjusting the separator width if it is off by full-width.
`text_align`	`"string"`	`"right"`	`right` or `left` or `center`

Build

Development

# If you don't have Zellij installed already
cargo install --locked zellij
# Git clone
git clone https://github.com/h1romas4/zellij-datetime
cd zellij-datetime
# Building the plugin
cargo build
# Running in Zellij
zellij -l plugin.kdl

Production

# Install wasm-snip
cargo install wasm-snip
# Build
cargo build --release
# Remove debug symbols and replaces unreachable.
wasm-snip target/wasm32-wasi/release/zellij-datetime.wasm -o target/wasm32-wasi/release/zellij-datetime-snip.wasm
# Deploy plugin directory
cp -p target/wasm32-wasi/release/zellij-datetime-snip.wasm ~/.config/zellij/plugins/zellij-datetime.wasm
# Running in Zellij
zellij

Development on Ubuntu 22.04 with container

It can be tested on the main branch of Zellij.
There is no confusion with the current Zellij session.
You can test the operation of the plugin authority from the initial state.

git clone https://github.com/zellij-org/zellij.git
git clone https://github.com/h1romas4/zellij-datetime
# build Zellij (A newer version of protobuf-compiler is required)
cd zellij
cargo xtask build --release
# build zellij-datetime
cd ../zellij-datetime
cargo build
# Run with container (podman or docker)
podman run \
    --name zellij-datetime \
    --env SHELL=/usr/bin/bash \
    -v ../zellij/target/release/:/opt/zellij \
    -v .:/opt/zellij-datetime \
    -w /opt/zellij-datetime \
    -it --rm \
    mcr.microsoft.com/devcontainers/base:ubuntu-22.04 \
    /opt/zellij/zellij -l plugin.kdl

License

MIT License

WIP

Support for changing timezone by click or scroll on a pane.
Support for timezone definition files.
Binary size reduction.
Improved parsing of configuration files.
Support for background color specification.
When a Zellij session is detached and reattached, the plugin stops without getting drawing and timer events. #2575
Unnecessary borderlines appear when this plugin is placed at the bottom of the workspace with borderless=true.
Display is disturbed when the screen width is smaller than the display string.
~~Separate control of the line from control of datetime string generation.~~ Support for Zellij UI components. Rendering a UI - Zellij User Guide

Note

Operation log in riscv64

At this time, RISC-V is not yet supported in Wasmer 3.1.1 used by Zellij. RISC-V has been supported since Wasmer 3.2.

$ uname -a
Linux lpi4a 5.10.113-gbb4691fe5572 # riscv64 GNU/Linux
$ arch
riscv64
$ rustc -V
rustc 1.65.0 #riscv64gc-unknown-linux-gnu
$ zellij -V
zellij 0.36.0
$ zellij
Error occurred in server:

  × Thread 'async-std/runtime' panicked.
  ├─▶ At /home/sipeed/.cargo/registry/src/github.com-1ecc6299db9ec823/wasmer-compiler-cranelift-2.3.0/src/config.rs:73:45
  ╰─▶ construct Cranelift ISA for triple: Unsupported
  help: If you are seeing this message, it means that something went wrong.

        -> To get additional information, check the log at: /tmp/zellij-1001/zellij-log/zellij.log
        -> To see a backtrace next time, reproduce the error with: RUST_BACKTRACE=1 zellij [...]
        -> To help us fix this, please open an issue: https://github.com/zellij-org/zellij/issues