= Hooks == Description Commands can be registered to be executed when certain events arise. To register a hook use the following command: ---------------------------------------------------------------------- hook [-group ] ---------------------------------------------------------------------- *scope* can be one of *global*, *buffer* or *window* (See <>). *command* is a string containing the commands to execute when the hook is called. For example to automatically use line numbering with .cc files, use the following command: ---------------------------------------------------- hook global WinCreate .*\.cc %{ add-highlighter number_lines } ---------------------------------------------------- If *group* is given, make this hook part of the named group. Groups are used for removing hooks with the following command: ----------------------- remove-hooks ----------------------- A call to the command above will remove every hooks in *scope* that are part of the given *group*. == Default hooks *NormalIdle*:: a certain duration has passed since last key was pressed in normal mode *NormalBegin*:: entering normal mode *NormalEnd*:: leaving normal mode *NormalKey* `key`:: a key is received in normal mode *InsertIdle*:: a certain duration has passed since last key was pressed in insert mode *InsertBegin*:: entering insert mode *InsertEnd*:: leaving insert mode *InsertKey* `key`:: a key is received in insert mode *InsertChar* `char`:: a character is received in insert mode *InsertDelete* `deleted char`:: a character is deleted in insert mode *InsertMove* `move key`:: the cursor moved (without inserting) in insert mode *PromptIdle*:: a certain duration has passed since last key was pressed in prompt mode *WinCreate* `buffer name`:: a window was created *WinClose* `buffer name`:: a window was destroyed *WinResize* `.`:: a window was resized *WinDisplay* `buffer name`:: a window was bound a client *WinSetOption* `=`:: an option was set in a window context *BufSetOption* `=`:: an option was set in a buffer context *BufNewFile* `filename`:: a buffer for a new file has been created *BufOpenFile* `filename`:: a buffer for an existing file has been created *BufCreate* `filename`:: a buffer has been created *BufWritePre* `filename`:: executed just before a buffer is written *BufWritePost* `filename`:: executed just after a buffer is written *BufClose* `buffer name`:: executed when a buffer is deleted, while it is still valid *BufOpenFifo* `buffer name`:: executed when a buffer opens a fifo *BufReadFifo* `buffer name`:: executed after some data has been read from a fifo and inserted in the buffer *BufCloseFifo*:: executed when a fifo buffer closes its fifo file descriptor either because the buffer is being deleted or the writing end has been closed *RuntimeError* `error message`:: an error was encountered while executing a user command *InputModeChange* `:`:: Triggered whenever the current input mode changes *KakBegin*:: kakoune has started, this hook is called just after reading the user configuration files *KakEnd*:: kakoune is quitting *FocusIn* `client name`:: on supported clients, triggered when the client gets focused *FocusOut* `client name`:: on supported clients, triggered when the client gets unfocused *InsertCompletionShow*:: Triggered when the insert completion menu gets displayed *InsertCompletionHide*:: Triggered when the insert completion menu gets hidden *InsertCompletionSelect* `selected completion`:: Triggered when an entry is selected in the insert completion menu. The filtering text is the selected completion text or the empty string if the original text was selected back. *RawKey* `key`:: Triggered whenever a key is pressed by the user When not specified, the filtering text is an empty string. Note that some hooks will not consider underlying scopes depending on what context they are bound to be run into, e.g. the `BufWritePost` hook is a buffer hook, and will not consider the `window` scope. While defining hook commands with a `%sh{}` block, some additional env vars are available: * `kak_hook_param`: filtering text passed to the currently executing hook * `kak_hook_param_capture_N`: text captured by the hook filter regex capture N == Disabling Hooks Any normal mode command can be prefixed with `\ ` which will disable hook execution for the duration for the command (including the duration of modes the command could move to, so `\i` will disable hooks for the whole insert session). As autoindentation is implemented in terms of hooks, this can be used to disable it when pasting text. A less temporary alternative is to set the `disabled_hooks` option which accepts a regex describing which hooks won't be executed. For example indentation hooks can be disabled with '.*-indent'. Finally, hook execution can be disabled while using the `execute-keys` or `evaluate-commands` commands by using the `-no-hooks` switch. (See <>)