improve scrolling behaviors

Especially move the selection when you're at one end and you
try to scroll the blocked way. Fix #419

2 files changed, 7 insertions, 1 deletions

diff --git a/src/command/completion.rs b/src/command/completion.rs
index 0e7090d..3964a92 100644
--- a/src/command/completion.rs
+++ b/src/command/completion.rs
@@ -46,7 +46,7 @@ impl Completions {
         }
         let mut iter = completions.iter();
         let mut common: &str = match iter.next() {
-            Some(s) => &s,
+            Some(s) => s,
             _ => { return Self::None; }
         };
         for c in iter {
diff --git a/src/command/scroll.rs b/src/command/scroll.rs
index 73928bf..5734c25 100644
--- a/src/command/scroll.rs
+++ b/src/command/scroll.rs
@@ -12,6 +12,12 @@ impl ScrollCommand {
             Self::Pages(n) => n * page_height as i32,
         }
     }
+    pub fn is_up(self) -> bool {
+        match self {
+            Self::Lines(n) => n < 0,
+            Self::Pages(n) => n < 0,
+        }
+    }
     /// compute the new scroll value
     pub fn apply(
         self,