From 94a276d9e8a4215af95334a45b64a5923616abf6 Mon Sep 17 00:00:00 2001
From: Cezar Craciun <craciuncezar1996@gmail.com>
Date: Thu, 13 Jan 2022 23:52:15 +0200
Subject: [PATCH] Limit the number of visible options in fuzzy select

---
 examples/fuzzyselect.rs     | 24 ++++++++++++++++++++++++
 src/prompts/fuzzy_select.rs |  7 +++++++
 2 files changed, 31 insertions(+)

diff --git a/examples/fuzzyselect.rs b/examples/fuzzyselect.rs
index 93b9b623..a00fb6b1 100644
--- a/examples/fuzzyselect.rs
+++ b/examples/fuzzyselect.rs
@@ -6,6 +6,30 @@ fn main() {
         "Vanilla Cupcake",
         "Chocolate Muffin",
         "A Pile of sweet, sweet mustard",
+        "Carrots",
+        "Peas",
+        "Pistacio",
+        "Mustard",
+        "Cream",
+        "Banana",
+        "Chocolate",
+        "Flakes",
+        "Corn",
+        "Cake",
+        "Tarte",
+        "Cheddar",
+        "Vanilla",
+        "Hazelnut",
+        "Flour",
+        "Sugar",
+        "Salt",
+        "Potato",
+        "French Fries",
+        "Pizza",
+        "Mousse au chocolat",
+        "Brown sugar",
+        "Blueberry",
+        "Burger",
     ];
 
     let selection = FuzzySelect::with_theme(&ColorfulTheme::default())
diff --git a/src/prompts/fuzzy_select.rs b/src/prompts/fuzzy_select.rs
index 4d423e49..155ebd29 100644
--- a/src/prompts/fuzzy_select.rs
+++ b/src/prompts/fuzzy_select.rs
@@ -152,6 +152,12 @@ impl FuzzySelect<'_> {
         // Fuzzy matcher
         let matcher = fuzzy_matcher::skim::SkimMatcherV2::default();
 
+        let term_size_rows = term.size().0 as usize;
+        // Subtract -2 because we need space to render the prompt.
+        let visible_term_rows = term_size_rows
+            .max(3) // Safeguard in case term_size_rows is 2 or less.
+            - 2;
+
         term.hide_cursor()?;
 
         loop {
@@ -164,6 +170,7 @@ impl FuzzySelect<'_> {
                 .iter()
                 .map(|item| (item, matcher.fuzzy_match(item, &search_term)))
                 .filter_map(|(item, score)| score.map(|s| (item, s)))
+                .take(visible_term_rows)
                 .collect::<Vec<_>>();
 
             // Renders all matching items, from best match to worst.