Mouse bindings are configurable.

The assignments are based around a triggering mouse event which may be combined
with a set of modifier keys to produce an action.

## Default Mouse Assignments

In the table below, `Triple Left Down` means that the left mouse button is
being triple clicked and that the event matches the downstroke of the third
quick consecutive press.  `Triple Left Up` matches the subsequent release event
of that triple click, so for a triple click both
`SelectTextAtMouseCursor="Line"` and `CompleteSelection` will be triggered in
that order.

| Event | Modifiers | Action |
| --------- | --- | ------ |
| Triple Left Down | `NONE`   | `SelectTextAtMouseCursor="Line"`  |
| Double Left Down | `NONE`   | `SelectTextAtMouseCursor="Word"`  |
| Single Left Down | `NONE`   | `SelectTextAtMouseCursor="Cell"`  |
| Single Left Down | `SHIFT`   | `ExtendSelectionToMouseCursor={}`  |
| Single Left Up | `NONE`   | `CompleteSelectionOrOpenLinkAtMouseCursor="PrimarySelection"`  |
| Double Left Up | `NONE`   | `CompleteSelection="PrimarySelection"`  |
| Triple Left Up | `NONE`   | `CompleteSelection="PrimarySelection"`  |
| Single Left Drag | `NONE`   | `ExtendSelectionToMouseCursor="Cell"`  |
| Double Left Drag | `NONE`   | `ExtendSelectionToMouseCursor="Word"`  |
| Triple Left Drag | `NONE`   | `ExtendSelectionToMouseCursor="Line"`  |
| Single Middle Down | `NONE`   | `PasteFrom="PrimarySelection"`  |

If you don't want the default assignments to be registered, you can
disable all of them with this configuration; if you chose to do this,
you must explicitly register every binding.

```lua
return {
  disable_default_mouse_bindings = true,
}
```

## Configuring Mouse Assignments

*since: 20200607-144723-74889cd4*

You can define mouse actions using the `mouse_bindings` configuration section:

```lua
local wezterm = require 'wezterm';

return {
  mouse_bindings = {
    -- Right click sends "woot" to the terminal
    {
      event={Down={streak=1, button="Right"}},
      mods="NONE",
      action=wezterm.action{SendString="woot"}
    },

    -- Change the default click behavior so that it only selects
    -- text and doesn't open hyperlinks
    {
      event={Up={streak=1, button="Left"}},
      mods="NONE",
      action=wezterm.action{CompleteSelection="PrimarySelection"},
    },

    -- and make CTRL-Click open hyperlinks
    {
      event={Up={streak=1, button="Left"}},
      mods="CTRL",
      action="OpenLinkAtMouseCursor",
    },
  },
}
```

The `action` and `mods` portions are described in more detail in the key assignment
information below.

The `event` portion has three components;

* Whether it is a `Down`, `Up` or `Drag` event
* The number of consecutive clicks within the click threshold (the *click streak*)
* The mouse button; `Left`, `Right`, or `Middle`.

A double click is a `down-up-down` sequence where either the second button down
is held for long enough or is released and no subsequent down event occurs
within the click threshold.  When recognized, it emits a `Down` event with
`streak=2`.  If the mouse is moved while the button is held, a `Drag` event
with `streak=2` is generated.  When the mouse button is released an `Up` event
with `streak=2` is generated.

The mouse event recognizer supports an arbitrary click streak, so if
you wanted quadruple-click bindings you can specify `streak=4`.

| Event             | Lua Representation  |
| ----------------- | ------------------- |
| Triple Left Down  | `event={Down={streak=3, button="Left"}}` |
| Double Left Up  | `event={Up={streak=2, button="Left"}}` |
| Single Left Drag  | `event={Drag={streak=1, button="Left"}}` |



# Available Actions

See the [`KeyAssignment` reference](lua/keyassignment/index.md) for information
on available actions.