mirror of https://github.com/helix-editor/helix
130 lines
3.5 KiB
Rust
130 lines
3.5 KiB
Rust
//! These are macros to make getting very nested fields in the `Editor` struct easier
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//! These are macros instead of functions because functions will have to take `&mut self`
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//! However, rust doesn't know that you only want a partial borrow instead of borrowing the
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//! entire struct which `&mut self` says. This makes it impossible to do other mutable
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//! stuff to the struct because it is already borrowed. Because macros are expanded,
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//! this circumvents the problem because it is just like indexing fields by hand and then
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//! putting a `&mut` in front of it. This way rust can see that we are only borrowing a
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//! part of the struct and not the entire thing.
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/// Get the current view and document mutably as a tuple.
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/// Returns `(&mut View, &mut Document)`
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#[macro_export]
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macro_rules! current {
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($editor:expr) => {{
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let view = $crate::view_mut!($editor);
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let id = view.doc;
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let doc = $editor.documents.get_mut(&id).unwrap();
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(view, doc)
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}};
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}
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#[macro_export]
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macro_rules! current_ref {
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($editor:expr) => {{
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let view = $editor.tree.get($editor.tree.focus);
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let doc = &$editor.documents[&view.doc];
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(view, doc)
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}};
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}
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/// Get the current document mutably.
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/// Returns `&mut Document`
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#[macro_export]
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macro_rules! doc_mut {
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($editor:expr) => {{
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$crate::current!($editor).1
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}};
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}
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/// Get the current view mutably.
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/// Returns `&mut View`
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#[macro_export]
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macro_rules! view_mut {
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($editor:expr) => {{
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$editor.tree.get_mut($editor.tree.focus)
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}};
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}
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/// Get the current view immutably
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/// Returns `&View`
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#[macro_export]
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macro_rules! view {
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($editor:expr) => {{
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$editor.tree.get($editor.tree.focus)
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}};
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}
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#[macro_export]
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macro_rules! doc {
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($editor:expr) => {{
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$crate::current_ref!($editor).1
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}};
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}
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// Keymap macros
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#[macro_export]
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macro_rules! key {
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($key:ident) => {
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$crate::input::KeyEvent {
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code: $crate::keyboard::KeyCode::$key,
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modifiers: $crate::keyboard::KeyModifiers::NONE,
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}
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};
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($($ch:tt)*) => {
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$crate::input::KeyEvent {
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code: $crate::keyboard::KeyCode::Char($($ch)*),
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modifiers: $crate::keyboard::KeyModifiers::NONE,
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}
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};
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}
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#[macro_export]
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macro_rules! shift {
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($key:ident) => {
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$crate::input::KeyEvent {
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code: $crate::keyboard::KeyCode::$key,
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modifiers: $crate::keyboard::KeyModifiers::SHIFT,
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}
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};
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($($ch:tt)*) => {
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$crate::input::KeyEvent {
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code: $crate::keyboard::KeyCode::Char($($ch)*),
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modifiers: $crate::keyboard::KeyModifiers::SHIFT,
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}
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};
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}
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#[macro_export]
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macro_rules! ctrl {
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($key:ident) => {
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$crate::input::KeyEvent {
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code: $crate::keyboard::KeyCode::$key,
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modifiers: $crate::keyboard::KeyModifiers::CONTROL,
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}
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};
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($($ch:tt)*) => {
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$crate::input::KeyEvent {
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code: $crate::keyboard::KeyCode::Char($($ch)*),
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modifiers: $crate::keyboard::KeyModifiers::CONTROL,
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}
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};
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}
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#[macro_export]
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macro_rules! alt {
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($key:ident) => {
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$crate::input::KeyEvent {
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code: $crate::keyboard::KeyCode::$key,
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modifiers: $crate::keyboard::KeyModifiers::ALT,
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}
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};
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($($ch:tt)*) => {
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$crate::input::KeyEvent {
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code: $crate::keyboard::KeyCode::Char($($ch)*),
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modifiers: $crate::keyboard::KeyModifiers::ALT,
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}
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};
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}
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