Be more efficient with full screen refreshes.

xterm has some bad flickering if I just naively repaint the whole screen
every time. We can easily track whether we need to repaint the whole
screen or just the line.

1 files changed, 15 insertions, 2 deletions

diff --git a/src/main.rs b/src/main.rs
index 5a0d639..8e0cff8 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -13,6 +13,7 @@ use term::Key;
 enum Mode {
     Insert,
     Paste,
+    MultilinePaste,
     Normal,
 }
 
@@ -217,6 +218,18 @@ impl StateHistory {
                     return;
                 };
                 self.cursor_col = col;
+                let _ = self.repaint_line_full();
+                let _ = stdout().flush();
+            }
+            (Mode::MultilinePaste, Mode::MultilinePaste) => (),
+            (Mode::MultilinePaste, Mode::Paste) => {
+                return;
+            }
+            (Mode::MultilinePaste, _) => {
+                let Ok((_, col)) = term::cursor_pos(&mut self.stdin) else {
+                    return;
+                };
+                self.cursor_col = col;
                 let _ = self.repaint_all();
                 let _ = self.repaint_line_full();
                 let _ = stdout().flush();
@@ -256,7 +269,7 @@ fn edit(file: &OsStr) -> Result<(), Box<dyn Error>> {
         let c = term::read_key(&mut state.stdin)?;
         match c {
             Key::Timeout => {
-                if state.mode != Mode::Paste {
+                if state.mode != Mode::Paste && state.mode != Mode::MultilinePaste {
                     continue;
                 }
                 state.set_mode(Mode::Insert);
@@ -344,7 +357,7 @@ fn edit(file: &OsStr) -> Result<(), Box<dyn Error>> {
                 let _ = stdout().flush();
             }
             Key::Char(b'\r') => {
-                state.set_mode(Mode::Paste);
+                state.set_mode(Mode::MultilinePaste);
                 state.buf = state.buf.insert(
                     state
                         .buf