simplify

1 files changed, 76 insertions, 0 deletions

diff --git a/src/readline.rs b/src/readline.rs
new file mode 100644
index 0000000..8ff001c
--- /dev/null
+++ b/src/readline.rs
@@ -0,0 +1,76 @@
+use textmode::Textmode as _;
+
+pub struct Readline {
+    prompt: String,
+    input_line: String,
+    action: async_std::channel::Sender<crate::state::Action>,
+}
+
+impl Readline {
+    pub fn new(
+        action: async_std::channel::Sender<crate::state::Action>,
+    ) -> Self {
+        Self {
+            prompt: "$ ".into(),
+            input_line: "".into(),
+            action,
+        }
+    }
+
+    pub async fn handle_key(&mut self, key: textmode::Key) -> bool {
+        match key {
+            textmode::Key::String(s) => self.add_input(&s),
+            textmode::Key::Char(c) => {
+                self.add_input(&c.to_string());
+            }
+            textmode::Key::Ctrl(b'c') => self.clear_input(),
+            textmode::Key::Ctrl(b'd') => {
+                return true;
+            }
+            textmode::Key::Ctrl(b'm') => {
+                self.action
+                    .send(crate::state::Action::Run(self.input()))
+                    .await
+                    .unwrap();
+                self.clear_input();
+            }
+            textmode::Key::Backspace => self.backspace(),
+            _ => {}
+        }
+        self.action
+            .send(crate::state::Action::Render)
+            .await
+            .unwrap();
+        false
+    }
+
+    pub fn lines(&self) -> usize {
+        1 // XXX handle wrapping, multiline prompts
+    }
+
+    pub async fn render(
+        &self,
+        out: &mut textmode::Output,
+    ) -> anyhow::Result<()> {
+        out.move_to(23, 0);
+        out.write_str(&self.prompt);
+        out.write_str(&self.input_line);
+        Ok(())
+    }
+
+    fn input(&self) -> String {
+        self.input_line.clone()
+    }
+
+    fn add_input(&mut self, s: &str) {
+        self.input_line.push_str(s);
+    }
+
+    fn backspace(&mut self) {
+        self.input_line.pop();
+    }
+
+    fn clear_input(&mut self) {
+        self.input_line.clear();
+    }
+}