Set the cursor position appropriately.

This makes international input popups get placed correctly for
terminals that do that.

src/term_ui/mod.rs

@@ -357,6 +357,7 @@ impl TermUI {
                     &line[..],
                     STYLE_INFO,
                 );
+                self.screen.set_cursor(prefix.len() + 1, 0);
             },
 
             // Handle input
@@ -551,6 +552,7 @@ impl TermUI {
                         for c in editor.cursors.iter() {
                             if char_index >= c.range.0 && char_index <= c.range.1 {
                                 at_cursor = true;
+                                self.screen.set_cursor(px as usize, py as usize);
                             }
                         }
 
@@ -639,6 +641,7 @@ impl TermUI {
             {
                 self.screen
                     .draw(px as usize, py as usize, " ", STYLE_CURSOR);
+                self.screen.set_cursor(px as usize, py as usize);
             }
         }
     }

src/term_ui/screen.rs

@@ -1,5 +1,5 @@
 use std;
-use std::cell::RefCell;
+use std::cell::{Cell, RefCell};
 use std::io;
 use std::io::{BufWriter, Write};
 
@@ -15,6 +15,7 @@ use super::smallstring::SmallString;
 pub(crate) struct Screen {
     out: RefCell<BufWriter<io::Stdout>>,
     buf: RefCell<Vec<Option<(Style, SmallString)>>>,
+    main_cursor: Cell<(u16, u16)>,
     w: usize,
     h: usize,
 }
@@ -40,6 +41,7 @@ impl Screen {
         Screen {
             out: RefCell::new(out),
             buf: RefCell::new(buf),
+            main_cursor: Cell::new((0, 0)),
             w: w as usize,
             h: h as usize,
         }
@@ -113,10 +115,21 @@ impl Screen {
             }
         }
 
+        let cursor_pos = self.main_cursor.get();
+        queue!(out, crossterm::cursor::MoveTo(cursor_pos.0, cursor_pos.1)).unwrap();
+        self.main_cursor.set((0, 0));
+
         // Make sure everything is written out from the buffer.
         out.flush().unwrap();
     }
 
+    pub(crate) fn set_cursor(&self, x: usize, y: usize) {
+        self.main_cursor.set((
+            x.min(self.w.saturating_sub(1)) as u16,
+            y.min(self.h.saturating_sub(1)) as u16,
+        ));
+    }
+
     pub(crate) fn draw(&self, x: usize, y: usize, text: &str, style: Style) {
         if y < self.h {
             let mut buf = self.buf.borrow_mut();