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Tmux Better Mouse Mode

A tmux plugin to better manage the mouse.

Provides options to control mouse behavior in tmux, so it will behave exactly how you want:

  • Emulate mouse-support for full-screen programs like less that don't provide built in mouse support.
  • Exit copy-mode and return to your prompt by scrolling back all the way down to the bottom.
  • Adjust your scrolling speed.
  • And more!

Finally, tmux version 2.1 introduced backwards-incompatible changes to the mouse behavior, and this plugin restores the old mouse behavior. tmux version 2.2 mostly restores the 2.0 mouse behavior, but this plugin improves tmux mouse mode beyond those changes and provides you with more control.

Requirements

This plugin is intended for tmux version 2.1 and higher. It does not work for 2.0 or below.

NOTE: This plugin provides options to change the mouse-mode behavior, but does not enable mouse-mode.

To enable mouse-mode in tmux 2.1+, put the following line in your ~/.tmux.conf:

set-option -g mouse on

Key bindings

This plugin will overwrite the values for WheelUpPane and WheelDownPane in tmux in order to configure mouse scrolling.

To see your current setting for these variables, check the output of tmux list-keys -T root.

Installation with Tmux Plugin Manager (recommended)

  1. Add this plugin to the list of TPM plugins in .tmux.conf:

     set -g @plugin 'nhdaly/tmux-better-mouse-mode'

  2. Press prefix + I or run $TMUX_PLUGIN_MANAGER_PATH/tpm/scripts/install_plugins.sh to fetch the plugin and source it. You should now be able to use the plugin.

  3. To enable mouse-mode in tmux 2.1+, put the following line in your .tmux.conf:

     set-option -g mouse on

Manual Installation

  1. Clone the repo:

     $ git clone https://github.com/nhdaly/tmux-better-mouse-mode ~/clone/path

  2. Add this line to the bottom of .tmux.conf:

     run-shell ~/clone/path/scroll_copy_mode.tmux

  3. Reload TMUX environment:

     # type this in terminal
 $ tmux source-file ~/.tmux.conf

You should now be able to use the plugin.

Configuration

Set these options in .tmux.conf. For example, set -g @scroll-down-exit-copy-mode "off" to disable scrolling down exits copy-mode.

  • scroll-down-exit-copy-mode - When enabled, the pane exits copy-mode when scrolling hits the bottom of the scroll-back history.

    • "on" (default) - Scrolling can exit copy-mode.
    • "off" - Scrolling to bottom will stay in copy-mode.

  • scroll-without-changing-pane - When enabled, scrolling the mouse will not select the moused-over pane, allowing you to scroll a window just to read previous output and then keep typing in the current pane. Enabling this feature is a change from tmux 2.0 settings, but may be an improvement.

    • "on" - Scroll events are sent to moused-over pane.
    • "off" (default) - Scroll events stay in currently selected pane.

  • scroll-in-moused-over-pane - When enabled, scrolling with your mouse over a pane will perform the scroll in that pane, instead of the currently selected one. If scroll-without-changing-pane is set to "off", this will also select the moused-over pane.

    • "on" (default) - Scroll events select and scroll the moused-over pane.
    • "off" - Scroll events are ingored unless the mouse is over the currently selected pane.

  • scroll-speed-num-lines-per-scroll - Sets the number of lines to scroll per mouse wheel scroll event. The default option is 3, which was the scroll speed in tmux 2.0. Larger numbers scroll faster. To slow down scrolling to slower than one line per wheel click, set the value to a decimal between 0.0 and 1.0. With a decimal value, only that fraction of wheel events will take effect. The value must be > 0. Examples:

    • "3" (default) - Scroll three lines per every mouse wheel click.
    • "1" - One line per mouse wheel scroll click (smoothest).
    • "0.5" - Scroll one line only on every other mouse wheel scroll click.
    • "0.25" - Scroll one line only on every fourth mouse wheel scroll click.

  • emulate-scroll-for-no-mouse-alternate-buffer - When enabled, tmux will emulate scrolling for "full-screen", alternate buffer programs, such as less, man, or vi that don't themselves already support mouse interactions. It will not enter copy-mode and will not scroll through pane output history, but will instead send <up-arrow> (↑) and <down-arrow>(↓) keys to the application. The scroll speed is also set by @scroll-speed-num-lines-per-scroll above. This option defaults to "off", which matches the behavior in tmux 2.0. Note, though, that this default behavior may be undesirable since the pane history gets munged when entering a full-screen alternate buffer program. It's a pretty great option is all I'm saying.

    • "on" - ↑ and ↓ keys are passed to the alternate buffer program on scroll events.
    • "off" (default) - Scroll event causes scrollback in pane output.

Contributions

@nhdaly @corv89 @pallxk @hughdavenport @giddie @pochemuto @zeorin @alcesleo @iamjamestl

Inspiration

Inspired by David Verhasselt's in depth article on Tmux 2.1's changes to Mouse support and scrolling: http://www.davidverhasselt.com/better-mouse-scrolling-in-tmux/

License

MIT