63 lines
1.9 KiB
Rust
63 lines
1.9 KiB
Rust
//! These are macros to make getting very nested fields in the `Editor` struct easier
|
|
//! These are macros instead of functions because functions will have to take `&mut self`
|
|
//! However, rust doesn't know that you only want a partial borrow instead of borrowing the
|
|
//! entire struct which `&mut self` says. This makes it impossible to do other mutable
|
|
//! stuff to the struct because it is already borrowed. Because macros are expanded,
|
|
//! this circumvents the problem because it is just like indexing fields by hand and then
|
|
//! putting a `&mut` in front of it. This way rust can see that we are only borrowing a
|
|
//! part of the struct and not the entire thing.
|
|
|
|
/// Get the current view and document mutably as a tuple.
|
|
/// Returns `(&mut View, &mut Document)`
|
|
#[macro_export]
|
|
macro_rules! current {
|
|
( $( $editor:ident ).+ ) => {{
|
|
let view = $crate::view_mut!( $( $editor ).+ );
|
|
let id = view.doc;
|
|
let doc = $( $editor ).+ .documents.get_mut(&id).unwrap();
|
|
(view, doc)
|
|
}};
|
|
}
|
|
|
|
/// Get the current document mutably.
|
|
/// Returns `&mut Document`
|
|
#[macro_export]
|
|
macro_rules! doc_mut {
|
|
( $( $editor:ident ).+ ) => {{
|
|
$crate::current!( $( $editor ).+ ).1
|
|
}};
|
|
}
|
|
|
|
/// Get the current view mutably.
|
|
/// Returns `&mut View`
|
|
#[macro_export]
|
|
macro_rules! view_mut {
|
|
( $( $editor:ident ).+ ) => {{
|
|
$( $editor ).+ .tree.get_mut($( $editor ).+ .tree.focus)
|
|
}};
|
|
}
|
|
|
|
/// Get the current view immutably
|
|
/// Returns `&View`
|
|
#[macro_export]
|
|
macro_rules! view {
|
|
( $( $editor:ident ).+ ) => {{
|
|
$( $editor ).+ .tree.get($( $editor ).+ .tree.focus)
|
|
}};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! doc {
|
|
( $( $editor:ident ).+ ) => {{
|
|
$crate::current_ref!( $( $editor ).+ ).1
|
|
}};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! current_ref {
|
|
( $( $editor:ident ).+ ) => {{
|
|
let view = $( $editor ).+ .tree.get($( $editor ).+ .tree.focus);
|
|
let doc = &$( $editor ).+ .documents[&view.doc];
|
|
(view, doc)
|
|
}};
|
|
}
|