Document macros (#693)

* add docs

* clean up

* remove

* more

* Update helix-view/src/macros.rs

Co-authored-by: Ivan Tham <pickfire@riseup.net>

Co-authored-by: Ivan Tham <pickfire@riseup.net>

helix-view/src/editor.rs

@@ -345,11 +345,6 @@ impl Editor {
             .find(|doc| doc.path().map(|p| p == path.as_ref()).unwrap_or(false))
     }
 
-    // pub fn current_document(&self) -> Document {
-    //     let id = self.view().doc;
-    //     let doc = &mut editor.documents[id];
-    // }
-
     pub fn cursor(&self) -> (Option<Position>, CursorKind) {
         let view = view!(self);
         let doc = &self.documents[view.doc];

helix-view/src/macros.rs

@@ -1,3 +1,14 @@
+//! 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 ).+ ) => {{
@@ -7,6 +18,8 @@ macro_rules! current {
     }};
 }
 
+/// Get the current document mutably.
+/// Returns `&mut Document`
 #[macro_export]
 macro_rules! doc_mut {
     ( $( $editor:ident ).+ ) => {{
@@ -14,6 +27,8 @@ macro_rules! doc_mut {
     }};
 }
 
+/// Get the current view mutably.
+/// Returns `&mut View`
 #[macro_export]
 macro_rules! view_mut {
     ( $( $editor:ident ).+ ) => {{
@@ -21,6 +36,8 @@ macro_rules! view_mut {
     }};
 }
 
+/// Get the current view immutably
+/// Returns `&View`
 #[macro_export]
 macro_rules! view {
     ( $( $editor:ident ).+ ) => {{