Fix rollover of list selection

src/Tools/psxreadmap/src/lib.rs

@@ -56,24 +56,38 @@ pub struct ListSelection {
 }
 
 impl ListSelection {
-    fn change_value(&mut self, max: usize, f: fn(usize)->usize) {
-        if let Some(cur_selection) = self.selection {
-            self.selection = Some(f(cur_selection)%max);
-        }
-    }
-
     pub fn increment(&mut self, max: usize) {
-        fn add_one(value: usize) -> usize {
+        if let Some(cur_selection) = self.selection {
-            value + 1
+            self.selection = Some({
+                if cur_selection + 1 >= max {
+                    0
+                }
+
+                else {
+                    cur_selection + 1
+                }
+            });
         }
-        self.change_value(max, add_one)
     }
 
     pub fn decrement(&mut self, max: usize) {
-        fn sub_one(value: usize) -> usize {
+        if let Some(cur_selection) = self.selection {
-            value - 1
+            self.selection = Some({
+                if cur_selection - 1 >= max {
+                    if max - 1 > 0 {
+                        max - 1
+                    }
+                    
+                    else {
+                        0
+                    }
+                }
+
+                else {
+                    cur_selection - 1
+                }
+            });
         }
-        self.change_value(max, sub_one)
     }
 
     pub fn activate(&mut self) {
@@ -169,7 +183,7 @@ impl ConsoleUI {
                             Ok(UIState::Alive)
                         }
                     },
-                    _                  => Ok(UIState::Alive)
+                    _ => Ok(UIState::Alive)
                 }
             },
             Event::Tick => {
@@ -240,9 +254,9 @@ impl ConsoleUI {
 
     fn render_stats(frame: &mut ConsoleFrame, layout: Rect, content_selection: &ListSelection, data: &mut ConsoleUIData) {
         let layout = Layout::default().direction(Direction::Vertical).constraints([
-            Constraint::Min(3),
-            Constraint::Min(3),
             Constraint::Length(3),
+            Constraint::Max(3),
+            Constraint::Max(3),
         ]).split(layout).to_vec();
         let content_list = List::new({
             let mut vec = Vec::new();
@@ -315,21 +329,14 @@ impl ConsoleUIData {
             if let Some(section) = memory_map.sections.last() {
                 return section.adr + section.size as u64;
             }
-
             0u64
         }
 
         self.highest_adr = get_last_section_end_adr(memory_map);
-        self.list = vec![
+        self.list = vec![String::from("<overall usage>")];
-            String::from("Schwimmflugel 0"),
+        for section in &memory_map.sections {
-            String::from("Schwimmflugel 1"),
+            self.list.push(section.name.clone());
-            String::from("Schwimmflugel 2"),
+        }
-            String::from("Schwimmflugel 3"),
-            String::from("Schwimmflugel 4"),
-            String::from("Schwimmflugel 5"),
-            String::from("Schwimmflugel 6"),
-            String::from("Schwimmflugel 7"),
-            ];
         Ok(())
     }
 }