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🗒 Bindkeys Map

Bindkey

The bindkey key mappings can be very confusing to decipher. It can use multiple different notations but it's smart to use the same key notation throughout your configuration. You can print all of your current key bindings in the current keymap with bindkey. To print the full bindkey command to add to your .zshrc file use bindkey -L.

In general, you'll bind a widget so a key sequence or a key with a modifier. This can be declared in caret notation using ^, using escape sequences using \, in octal (\NNN), hex (\xNN), or Unicode (\uNNNN). None of these are particularly great for people to read. This is also tricky because it depends on your keyboard, operating system, and shell.

Here are some basics:

  • \e, \E, = Escape
  • ^[ = Alt key (on some keyboards this is the same as escape)
  • ^? = Delete
  • ^X, ^ = Control

The keys that come after the modifier can add more confusion.

Delete key binding

To delete a key binding you can use bindkey -d $KEYS. Make sure you don't delete the characters you need for typing.

The bindmap'…' keybindings

Sometimes plugins call bindkey to assign keyboard shortcuts. This can cause problems because multiple plugins can bind the same keys.

Also, the user might want a different binding(s), which will require complicated, additional bindkey commands in .zshrc.

Zi provides a solution to this problem – the ability to remap the bindkeys with a short ice-modifier bindmap'…'.

Examples for bindmap'…'

Map Ctrl-G instead of Ctrl-R for the history searcher.

zi bindmap'^R -> ^G' for z-shell/history-search-multi-word

Map Ctrl-Shift-Left and Ctrl-Shift-Right used by URxvt instead of the Xterms' ones. Load with the bindkey-tracking ↔ with light-loading for anything else.

Could also separate the bindmaps with a semicolon, i.e.:

bindmap'"\\e[1\;6D" -> \\e[1\;5D ; "\\e[1\;6C" -> ^[[1\;5C' \
zi wait light-mode trackbinds bindmap'"\\e[1\;6D" -> \\e[1\;5D"' \
bindmap'"\\e[1\;6C" -> ^[[1\;5C' pick'dircycle.zsh' for \
michaelxmcbride/zsh-dircycle

Map space to regular space and Ctrl-Space to the globalias widget, which expands the alias entered on the left, provided by OMZ globalias plugin.

zi bindmap='!" " -> magic-space; !"^ " -> globalias' nocompletions \
depth=1 pick=plugins/globalias/globalias.plugin.zsh for \
ohmyzsh/ohmyzsh

Explanation

The bindmap'…' ice has two modes of operation: normal and exclamation-mark (bindmap'!…'). In the first mode, the remapping is being done from-key to-key, i.e.: bindmap'fromkey -> to-key'.

The given key is changed to the second given key in the bindkey command while loading the plugin. In the second mode, the remapping is being done from-key to-widget, e.g: bindmap'!from-key -> to-widget'.

In this mode, the given key is being mapped to the given widget instead of the widget specified in the bindkey command e.g.:

Instead of:

bindkey "^ " magic-space
bindkey " " globalias

The actual call that'll be done will be:

bindkey "^ " globalias
bindkey " " magic-space

For the bindmap='!" " -> magic-space; !"^ " -> globalias' ice.

Using bindmap'…' in light mode

When the investigation mode is on i.e.:

  • when the full loading mode is being used, default in the for syntax, and when zi load … is used, then the bindmap'…' ice works normally.

In the non-investigation:

  • the light mode – activated when zi light … or the light-mode ice is being used – the bindmap'…' is unavailable, unless the trackbinds ice is specified:

With the use of the light-mode ice and the for-syntax:

zi light-mode for trackbinds bindmap'^R -> ^G' \
z-shell/history-search-multi-word

With the use of the traditional syntax:

zi ice trackbinds bindmap'^R -> ^G'
zi light z-shell/history-search-multi-word

Using the UPAR shorthands

There are four special values that can be used on the left side of the bind-map: UPAR, DOWNAR, LEFTAR, RIGHTAR. They'll match up arrow, down arrow, etc. So that it's possible to do:

zi bindmap='LEFTAR -> ^F; RIGHTAR -> ^G'

The benefit of using the UPAR, … shorthands is that they cover multiple possible cursor-key codes for each of the cursor keys so that they'll work regardless of the terminal is used.