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//! Keymap macro
// Keymap macro implementation.
//
// Token-tree muncher: { rest } ( visible ) ( modifiers ) ( keys ) [ data ]
//
// Consumes definition from 'rest'. Modifiers are accumulated in 'modifiers'. Key definitions are
// accumulated in 'keys'. Bindings are accumulated in 'data'.
macro_rules! keymap_impl {
// Base case: generate keymap data.
( {} ( $visible:literal ) () () $data:tt ) => {
pub(crate) static KEYMAP: $crate::keymaps::KeymapData = &$data;
};
// , (consume comma between keys)
(
{ , $( $rest:tt )* }
( $visible:literal )
( )
( $( $keys:tt )* )
[ $( $data:tt )* ]
) => {
keymap_impl! {
{ $( $rest )* }
( $visible )
( )
( $( $keys )* )
[ $( $data )* ]
}
};
// => Binding (termination)
(
{
=> $action:ident $( ( $( $action_params:tt )* ) )? ;
$( $rest:tt )*
}
( $visible:literal )
( )
( )
[ $( $data:tt )* ]
) => {
keymap_impl! {
{ $( $rest )* }
( $visible )
( )
( )
[ $( $data )* ]
}
};
// => Binding (assign key)
(
{
=> $action:ident $( ( $( $action_params:tt )* ) )? ;
$( $rest:tt )*
}
( $visible:literal )
( )
( $key:tt $key_visible:literal $( $keys:tt )* )
[ $( $data:tt )* ]
) => {
keymap_impl! {
{
=> $action $( ( $( $action_params )* ) )? ;
$( $rest )*
}
( $visible )
( )
( $( $keys )* )
[
$( $data )*
(
$key,
$crate::bindings::BindingConfig {
binding: $crate::bindings::Binding::Action(
$crate::action::Action::$action $( ( $( $action_params )* ) )?
),
visible: $key_visible,
},
),
]
}
};
// CTRL
(
{ CTRL $( $rest:tt )* }
( $visible:literal )
( $( $modifier:ident )* )
( $( $keys:tt )* )
[ $( $data:tt )* ]
) => {
keymap_impl! {
{ $( $rest )* }
( $visible )
( $( $modifier )* CTRL )
( $( $keys )* )
[ $( $data )* ]
}
};
// SHIFT
(
{ SHIFT $( $rest:tt )* }
( $visible:literal )
( $( $modifier:ident )* )
( $( $keys:tt )* )
[ $( $data:tt )* ]
) => {
keymap_impl! {
{ $( $rest )* }
( $visible )
( $( $modifier )* SHIFT )
( $( $keys )* )
[ $( $data )* ]
}
};
// ALT
(
{ ALT $( $rest:tt )* }
( $visible:literal )
( $( $modifier:ident )* )
( $( $keys:tt )* )
[ $( $data:tt )* ]
) => {
keymap_impl! {
{ $( $rest )* }
( $visible )
( $( $modifier )* ALT )
( $( $keys )* )
[ $( $data )* ]
}
};
// SUPER
(
{ SUPER $( $rest:tt )* }
( $visible:literal )
( $( $modifier:ident )* )
( $( $keys:tt )* )
[ $( $data:tt )* ]
) => {
keymap_impl! {
{ $( $rest )* }
( $visible )
( $( $modifier )* SUPER )
( $( $keys )* )
[ $( $data )* ]
}
};
// Character key (e.g. 'c')
(
{ $key:literal $( $rest:tt )* }
( $visible:literal )
( $( $modifier:ident )* )
( $( $keys:tt )* )
[ $( $data:tt )* ]
) => {
keymap_impl! {
{ $( $rest )* }
( true )
( )
(
$( $keys )*
(
termwiz::input::Modifiers::from_bits_truncate(
$( termwiz::input::Modifiers::$modifier.bits() | )*
termwiz::input::Modifiers::NONE.bits()
),
termwiz::input::KeyCode::Char($key),
)
$visible
)
[ $( $data )* ]
}
};
// F <number>
(
{ F $num:literal $( $rest:tt )* }
( $visible:literal )
( $( $modifier:ident )* )
( $( $keys:tt )* )
[ $( $data:tt )* ]
) => {
keymap_impl! {
{ $( $rest )* }
( true )
( )
(
$( $keys )*
(
termwiz::input::Modifiers::from_bits_truncate(
$( termwiz::input::Modifiers::$modifier.bits() | )*
termwiz::input::Modifiers::NONE.bits()
),
termwiz::input::KeyCode::Function($num),
)
$visible
)
[ $( $data )* ]
}
};
// KeyCode
(
{ $key:ident $( $rest:tt )* }
( $visible:literal )
( $( $modifier:ident )* )
( $( $keys:tt )* )
[ $( $data:tt )* ]
) => {
keymap_impl! {
{ $( $rest )* }
( true )
( )
(
$( $keys )*
(
termwiz::input::Modifiers::from_bits_truncate(
$( termwiz::input::Modifiers::$modifier.bits() | )*
termwiz::input::Modifiers::NONE.bits()
),
termwiz::input::KeyCode::$key,
)
$visible
)
[ $( $data )* ]
}
};
// ( hidden binding )
(
{ ( $( $bind:tt )* ) $( $rest:tt )* }
( $visible:literal )
( $( $modifier:ident )* )
( $( $keys:tt )* )
[ $( $data:tt )* ]
) => {
keymap_impl! {
{ $( $bind )* $( $rest )* }
( false )
( $( $modifier )* )
( $( $keys )* )
[ $( $data )* ]
}
};
}
macro_rules! keymap {
( $( $all:tt )* ) => {
keymap_impl! { { $( $all )* } (true) () () [] }
};
}