added base col width

helix-term/src/application.rs

@@ -34,6 +34,8 @@ type Terminal = tui::Terminal<CrosstermBackend<std::io::Stdout>>;
 
 static EX: smol::Executor = smol::Executor::new();
 
+const BASE_WIDTH: u16 = 30;
+
 pub struct Application {
     editor: Editor,
     prompt: Option<Prompt>,
@@ -253,9 +255,10 @@ impl Renderer {
             );
             let mut row = 0;
             let mut col = 0;
+            let max_row: u16 = self.size.0 / BASE_WIDTH;
             // TODO: this will crash if there are too many cols added
             // TODO: set char limit
-            for i in (0..completion.len()) {
+            for (i, command) in completion.iter().enumerate() {
                 let color = if prompt.completion_selection_index.is_some()
                     && i == prompt.completion_selection_index.unwrap()
                 {
@@ -263,16 +266,20 @@ impl Renderer {
                 } else {
                     self.text_color
                 };
-                self.surface.set_string(
-                    1 + col * 10,
-                    self.size.1 - 6 + row as u16,
-                    &completion[i],
+                self.surface.set_stringn(
+                    1 + row * BASE_WIDTH,
+                    self.size.1 - 6 + col as u16,
+                    &command,
+                    BASE_WIDTH as usize - 1,
                     color,
                 );
-                row += 1;
-                if row > 3 {
-                    row = 0;
-                    col += 1;
+                col += 1;
+                if col > 3 {
+                    col = 0;
+                    row += 1;
+                }
+                if row > max_row {
+                    break;
                 }
             }
         }
@@ -436,6 +443,31 @@ impl Application {
                                                 String::from("ccc"),
                                                 String::from("ddd"),
                                                 String::from("eee"),
+                                                String::from("averylongcommandaverylongcommandaverylongcommandaverylongcommandaverylongcommand"),
+                                                String::from("q"),
+                                                String::from("aaa"),
+                                                String::from("bbb"),
+                                                String::from("ccc"),
+                                                String::from("ddd"),
+                                                String::from("eee"),
+                                                String::from("q"),
+                                                String::from("aaa"),
+                                                String::from("bbb"),
+                                                String::from("ccc"),
+                                                String::from("ddd"),
+                                                String::from("eee"),
+                                                String::from("q"),
+                                                String::from("aaa"),
+                                                String::from("bbb"),
+                                                String::from("ccc"),
+                                                String::from("ddd"),
+                                                String::from("eee"),
+                                                String::from("q"),
+                                                String::from("aaa"),
+                                                String::from("bbb"),
+                                                String::from("ccc"),
+                                                String::from("ddd"),
+                                                String::from("eee"),
                                             ];
                                             for command in command_list {
                                                 if command.contains(_input) {

helix-view/src/prompt.rs

@@ -39,7 +39,7 @@ impl Prompt {
     }
 
     pub fn move_char_left(&mut self) {
-        if self.cursor > 1 {
+        if self.cursor > 0 {
             self.cursor -= 1;
         }
     }
@@ -68,23 +68,25 @@ impl Prompt {
     }
 
     pub fn change_completion_selection(&mut self) {
-        self.completion_selection_index = self
-            .completion_selection_index
-            .map(|i| {
-                if i == self.completion.as_ref().unwrap().len() - 1 {
-                    0
-                } else {
-                    i + 1
-                }
-            })
-            .or(Some(0));
-        self.line = String::from(
-            self.completion
-                .as_ref()
-                .unwrap()
-                .get(self.completion_selection_index.unwrap())
-                .unwrap(),
-        );
+        if self.completion.is_some() {
+            self.completion_selection_index = self
+                .completion_selection_index
+                .map(|i| {
+                    if i == self.completion.as_ref().unwrap().len() - 1 {
+                        0
+                    } else {
+                        i + 1
+                    }
+                })
+                .or(Some(0));
+            self.line = String::from(
+                self.completion
+                    .as_ref()
+                    .unwrap()
+                    .get(self.completion_selection_index.unwrap())
+                    .unwrap(),
+            );
+        }
     }
 
     pub fn exit_selection(&mut self) {