add selected byte information

src/binocle.rs

@@ -12,7 +12,7 @@ use crate::view::View;
 
 pub struct Binocle {
     pub settings: Settings,
-    buffer: Buffer,
+    pub buffer: Buffer,
 }
 
 impl Binocle {

src/event_loop.rs

@@ -231,6 +231,30 @@ pub fn run(options: CliOptions) -> Result<()> {
                     }
 
                     if let Some((x, y)) = input.mouse() {
+                        if let Ok((x, y)) = pixels.window_pos_to_pixel((x, y)) {
+                            let px_size = 2usize.pow((settings.zoom - 1) as u32);
+                            let x_px = x / px_size;
+                            let y_px = y / px_size;
+                            let px_window_selected = x_px + (y_px * settings.width as usize);
+                            let offset = settings.offset + settings.offset_fine;
+                            let byte_data_selected = px_window_selected + offset as usize;
+                            let data = binocle.buffer.data();
+                            let start = data.get(byte_data_selected..);
+                            let end = start.map(|start| start.get(..16)).flatten();
+                            let bytes = match (start, end) {
+                                (None, _) => None,
+                                (Some(partial_data), None) => {
+                                    let mut data = 0u128.to_ne_bytes();
+                                    data[..partial_data.len()].copy_from_slice(partial_data);
+                                    Some(data)
+                                }
+                                (_, Some(data)) => Some(data.try_into().unwrap()),
+                            };
+                            if let Some(bytes) = bytes {
+                                settings.selected_byte = byte_data_selected;
+                                settings.selected_data = bytes;
+                            }
+                        }
                         if input.mouse_pressed(0) {
                             if input.held_shift() {
                                 mouse_drag_action = MouseDragAction::ControlOffsetFine {

src/gui.rs

@@ -298,6 +298,36 @@ impl Gui {
             ui.checkbox(&mut settings.hex_view_visible, "hex view");
             ui.separator();
 
+            ui.add(egui::Label::new("Data information").heading());
+            let data_u128 = u128::from_le_bytes(settings.selected_data);
+            let data_u8 = data_u128 as u8;
+            let data_u16 = data_u128 as u16;
+            let data_u32 = data_u128 as u32;
+            let data_u64 = data_u128 as u64;
+            let mut to_label = |x: String| {
+                ui.add(egui::Label::new(x).monospace().wrap(false));
+            };
+            to_label(format!("byte: {}", settings.selected_byte));
+            to_label(format!("u8: {data_u8}"));
+            to_label(format!("i8: {}", data_u8 as i8));
+            to_label(format!("u16le: {data_u16}"));
+            to_label(format!("u16be: {}", data_u16.to_be()));
+            to_label(format!("i16le: {}", data_u16 as i16));
+            to_label(format!("i16be: {}", data_u16.to_be() as i16));
+            to_label(format!("u32le: {data_u32}"));
+            to_label(format!("u32be: {}", data_u32.to_be()));
+            to_label(format!("i32le: {}", data_u32 as i32));
+            to_label(format!("i32be: {}", data_u32.to_be() as i32));
+            to_label(format!("u64le: {data_u64}"));
+            to_label(format!("u64be: {}", data_u64.to_be()));
+            to_label(format!("i64le: {}", data_u64 as i64));
+            to_label(format!("i64be: {}", data_u64.to_be() as i64));
+            to_label(format!("f32le: {:e}", f32::from_bits(data_u32)));
+            to_label(format!("f32be: {:e}", f32::from_bits(data_u32.to_be())));
+            to_label(format!("f64le: {:e}", f64::from_bits(data_u64)));
+            to_label(format!("f64be: {:e}", f64::from_bits(data_u64.to_be())));
+
+            ui.separator();
             ui.add(egui::Label::new("Information").heading());
             let file_size = settings
                 .buffer_length

src/settings.rs

@@ -63,6 +63,9 @@ pub struct Settings {
 
     pub gui_wants_keyboard: bool,
     pub gui_wants_mouse: bool,
+
+    pub selected_byte: usize,
+    pub selected_data: [u8; 16],
 }
 
 impl Settings {
@@ -103,6 +106,8 @@ impl Default for Settings {
             hex_ascii: "".into(),
             gui_wants_keyboard: false,
             gui_wants_mouse: false,
+            selected_byte: 0,
+            selected_data: [0; 16],
         }
     }
 }