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47 lines
1.6 KiB
Rust
47 lines
1.6 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:ident ).+ ) => {{
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let view = $crate::view_mut!( $( $editor ).+ );
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let doc = &mut $( $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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( $( $editor:ident ).+ ) => {{
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$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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( $( $editor:ident ).+ ) => {{
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$( $editor ).+ .tree.get_mut($( $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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( $( $editor:ident ).+ ) => {{
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$( $editor ).+ .tree.get($( $editor ).+ .tree.focus)
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}};
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}
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