Add a keymap module.

1 files changed, 116 insertions, 0 deletions

diff --git a/helix-term/src/keymap.rs b/helix-term/src/keymap.rs
new file mode 100644
index 00000000..b2d6738b
--- /dev/null
+++ b/helix-term/src/keymap.rs
@@ -0,0 +1,116 @@
+use crossterm::event::{KeyEvent as Key, KeyModifiers as Modifiers};
+use helix_core::commands::{self, Command};
+use std::collections::HashMap;
+
+// Kakoune-inspired:
+// mode = {
+//      normal = {
+//          q = record_macro
+//          w = (next) word
+//          e = end of word
+//          r =
+//          t = 'till char
+//          y = yank
+//          u = undo
+//          U = redo
+//          i = insert
+//          I = INSERT (start of line)
+//          o = open below (insert on new line below)
+//          O = open above (insert on new line above)
+//          p = paste (before cursor)
+//          P = PASTE (after cursor)
+//          ` =
+//          [ = select to text object start (alt = select whole object)
+//          ] = select to text object end
+//          { = extend to inner object start
+//          } = extend to inner object end
+//          a = append
+//          A = APPEND (end of line)
+//          s = split
+//          S = select
+//          d = delete()
+//          f = find_char()
+//          g = goto (gg, G, gc, gd, etc)
+//
+//          h = move_char_left(n)
+//          j = move_line_down(n)
+//          k = move_line_up(n)
+//          l = move_char_right(n)
+//          : = command line
+//          ; = collapse selection to cursor
+//          " = use register
+//          ` = convert case? (to lower) (alt = swap case)
+//          ~ = convert to upper case
+//          . = repeat last command
+//          \ = disable hook?
+//          / = search
+//          > = indent
+//          < = deindent
+//          % = select whole buffer (in vim = jump to matching bracket)
+//          * = search pattern in selection
+//          ( = rotate main selection backward
+//          ) = rotate main selection forward
+//          - = trim selections? (alt = merge contiguous sel together)
+//          @ = convert tabs to spaces
+//          & = align cursor
+//          ? = extend to next given regex match (alt = to prev)
+//
+//          z = save selections
+//          Z = restore selections
+//          x = select line
+//          X = extend line
+//          c = change selected text
+//          C = copy selection?
+//          v = view menu (viewport manipulation)
+//          b = select to previous word start
+//          B = select to previous WORD start
+//
+//
+//
+//
+//
+//
+//          = = align?
+//          + =
+//      }
+// }
+
+macro_rules! hashmap {
+    (@single $($x:tt)*) => (());
+    (@count $($rest:expr),*) => (<[()]>::len(&[$(hashmap!(@single $rest)),*]));
+
+    ($($key:expr => $value:expr,)+) => { hashmap!($($key => $value),+) };
+    ($($key:expr => $value:expr),*) => {
+        {
+            let _cap = hashmap!(@count $($key),*);
+            let mut _map = ::std::collections::HashMap::with_capacity(_cap);
+            $(
+                let _ = _map.insert($key, $value);
+            )*
+            _map
+        }
+    };
+}
+
+type Keymap = HashMap<Key, Command>;
+
+fn default() -> Keymap {
+    hashmap!(
+        Key {
+            code: "h",
+            modifiers: Modifiers::NONE
+        } => commands::move_char_left,
+        Key {
+            code: "j",
+            modifiers: Modifiers::NONE
+        } => commands::move_line_down,
+        Key {
+            code: "k",
+            modifiers: Modifiers::NONE
+        } => commands::move_line_up,
+        Key {
+            code: "l",
+            modifiers: Modifiers::NONE
+        } => commands::move_char_right,
+    );
+}