From e98cdebf1eb6ea5233c0d4cb0ae84c251fdae987 Mon Sep 17 00:00:00 2001
From: Blaž Hrastnik
Date: Mon, 8 Jun 2020 00:15:39 +0900
Subject: Add a command module.

---
 helix-core/src/commands.rs | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 helix-core/src/commands.rs

(limited to 'helix-core/src/commands.rs')

diff --git a/helix-core/src/commands.rs b/helix-core/src/commands.rs
new file mode 100644
index 00000000..78a1481a
--- /dev/null
+++ b/helix-core/src/commands.rs
@@ -0,0 +1,45 @@
+use crate::state::{Direction, Granularity, State};
+
+/// A command is a function that takes the current state and a count, and does a side-effect on the
+/// state (usually by creating and applying a transaction).
+type Command = fn(state: &mut State, count: usize);
+
+fn move_char_left(state: &mut State, count: usize) {
+    // TODO: use a transaction
+    state.selection = state.move_selection(
+        state.selection,
+        Direction::Backward,
+        Granularity::Character,
+        count,
+    );
+}
+
+fn move_char_right(state: &mut State, count: usize) {
+    // TODO: use a transaction
+    state.selection = state.move_selection(
+        state.selection,
+        Direction::Forward,
+        Granularity::Character,
+        count,
+    );
+}
+
+fn move_line_up(state: &mut State, count: usize) {
+    // TODO: use a transaction
+    state.selection = state.move_selection(
+        state.selection,
+        Direction::Backward,
+        Granularity::Line,
+        count,
+    );
+}
+
+fn move_line_down(state: &mut State, count: usize) {
+    // TODO: use a transaction
+    state.selection = state.move_selection(
+        state.selection,
+        Direction::Forward,
+        Granularity::Line,
+        count,
+    );
+}
-- 
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