Baseline project

src/repl/prompt.rs

@@ -0,0 +1,51 @@
+use crate::config::GlobalConfig;
+
+use reedline::{Prompt, PromptHistorySearch, PromptHistorySearchStatus};
+use std::borrow::Cow;
+
+#[derive(Clone)]
+pub struct ReplPrompt {
+    config: GlobalConfig,
+}
+
+impl ReplPrompt {
+    pub fn new(config: &GlobalConfig) -> Self {
+        Self {
+            config: config.clone(),
+        }
+    }
+}
+
+impl Prompt for ReplPrompt {
+    fn render_prompt_left(&self) -> Cow<'_, str> {
+        Cow::Owned(self.config.read().render_prompt_left())
+    }
+
+    fn render_prompt_right(&self) -> Cow<'_, str> {
+        Cow::Owned(self.config.read().render_prompt_right())
+    }
+
+    fn render_prompt_indicator(&self, _prompt_mode: reedline::PromptEditMode) -> Cow<'_, str> {
+        Cow::Borrowed("")
+    }
+
+    fn render_prompt_multiline_indicator(&self) -> Cow<'_, str> {
+        Cow::Borrowed("... ")
+    }
+
+    fn render_prompt_history_search_indicator(
+        &self,
+        history_search: PromptHistorySearch,
+    ) -> Cow<'_, str> {
+        let prefix = match history_search.status {
+            PromptHistorySearchStatus::Passing => "",
+            PromptHistorySearchStatus::Failing => "failing ",
+        };
+        // NOTE: magic strings, given there is logic on how these compose I am not sure if it
+        // is worth extracting in to static constant
+        Cow::Owned(format!(
+            "({}reverse-search: {}) ",
+            prefix, history_search.term
+        ))
+    }
+}