Cleanup selection code

src/Tools/psxreadmap/src/lib.rs

@@ -52,55 +52,42 @@ impl MenuSelection {
 }
 
 pub struct ListSelection {
-    pub selection: Option<usize>
+    pub id: usize
 }
 
 impl ListSelection {
     pub fn increment(&mut self, max: usize) {
-        if let Some(cur_selection) = self.selection {
-            self.selection = Some({
-                if cur_selection + 1 >= max {
-                    0
-                }
+        let new_selection = self.id + 1;
 
-                else {
-                    cur_selection + 1
-                }
-            });
-        }
+        self.id = {
+            if new_selection >= max {
+                0
+            }
+
+            else {
+                new_selection
+            }
+        } 
     }
 
     pub fn decrement(&mut self, max: usize) {
-        if let Some(mut cur_selection) = self.selection {
-            self.selection = Some({
-                cur_selection = cur_selection - 1;
-                if cur_selection > max - 1 {
-                        max - 1
-                }
+        let new_selection = self.id - 1;
 
-                else {
-                    cur_selection
-                }
-            });
+        self.id = {
+            if new_selection >= max {
+                max - 1
+            }
+
+            else {
+                 new_selection
+            }
         }
     }
-
-    pub fn activate(&mut self) {
-        self.selection = Some(0);
-    }
-
-    pub fn deactivate(&mut self) {
-        self.selection = None;
-    }
-
-    pub fn is_active(&self) -> bool {
-        self.selection.is_some()
-    }
 }
 
 impl Default for ListSelection {
     fn default() -> Self {
-        Self{selection: None}
+        Self{id: 0}
     }
 }
 
@@ -122,16 +109,8 @@ impl ConsoleUI {
 
     pub fn update_data(&mut self, memory_map: &MemoryMap) -> Result<(), Error> {
         self.data = ConsoleUIData::from(memory_map)?;
+        self.section_selection = ListSelection::default();
 
-        if self.data.section_info.len() > 0 {
-            if !self.section_selection.is_active() {
-                self.section_selection.activate();
-            }
-        }
-
-        else {
-            self.section_selection.deactivate();
-        }
         Ok(())
     }
 
@@ -199,16 +178,7 @@ impl ConsoleUI {
             }
         };
 
-        self.first_section_id = {
-            if let Some(selection) = self.section_selection.selection {
-                selection
-            }
-
-            else {
-                0
-            }
-        };
-
+        self.first_section_id = self.section_selection.id;
         input_result
     }
 
@@ -245,8 +215,7 @@ impl ConsoleUI {
             frame.render_widget(menu_bar, main_layout[0]);
             match self.menu_selection {
                 MenuSelection::Stats => {
-                    // ToDo:                                   v This is the same and we always have elements now
-                    Self::render_stats(frame, main_layout[1], (&self.section_selection, self.first_section_id), &mut self.data);
+                    Self::render_stats(frame, main_layout[1], &self.section_selection, &mut self.data);
                 },
                 MenuSelection::Quit  => {
                     frame.render_widget(Self::create_exit_message(), main_layout[1]);
@@ -264,7 +233,7 @@ impl ConsoleUI {
         Ok(())
     }
 
-    fn render_stats(frame: &mut ConsoleFrame, layout: Rect, content_selection: (&ListSelection, usize), data: &mut ConsoleUIData) {
+    fn render_stats(frame: &mut ConsoleFrame, layout: Rect, content_selection: &ListSelection, data: &mut ConsoleUIData) {
         let layout = Layout::default().direction(Direction::Vertical).constraints([
             Constraint::Length(3),
             Constraint::Max(3),
@@ -285,11 +254,11 @@ impl ConsoleUI {
         )
         .highlight_style(Style::default().bg(Color::Cyan));
 
-        let first_mem_gauge  = Self::create_mem_gauge_from(&data.section_info[content_selection.1], Color::Cyan);
+        let first_mem_gauge  = Self::create_mem_gauge_from(&data.section_info[content_selection.id], Color::Cyan);
         let second_mem_gauge = Self::create_mem_gauge_from(&data.section_info[0], Color::Red);
         let mut list_state = ListState::default();
         
-        list_state.select(content_selection.0.selection);
+        list_state.select(Some(content_selection.id));
 
         frame.render_stateful_widget(content_list, layout[0], &mut list_state);
         frame.render_widget(first_mem_gauge, layout[1]);