try to figure out delete logic

src/keys/edit.rs

@@ -39,6 +39,9 @@ impl Taggart {
             self.mode = None;
         }
     }
+    pub fn edit_clear (&mut self) {
+        todo!("edit_clear")
+    }
     pub fn edit_insert (&mut self, c: char) {
         if let Some(Mode::Edit { value, index }) = &self.mode {
             self.mode = Some(Mode::Edit {

src/main.rs

@@ -10,6 +10,7 @@ use std::thread::{sleep, spawn, JoinHandle};
 use std::time::Duration;
 
 use tengri::{input::*, output::*, tui::*};
+use crate::ratatui::style::{Style, Stylize};
 use crate::crossterm::event::{Event, KeyEvent, KeyCode, KeyModifiers, KeyEventState, KeyEventKind};
 
 use clap::{arg, command, value_parser};

src/model/column.rs

@@ -15,11 +15,7 @@ type Setter<T> = fn(&mut T, usize, &str);
 type Styler<T> = fn(&T)->Option<Style>;
 
 impl<G, S, U> Column<Getter<G>, Setter<S>, Styler<U>> {
-    pub fn new (
-        title: &impl AsRef<str>,
-        width: usize,
-        getter: Getter<G>,
-    ) -> Self {
+    pub fn new (title: &impl AsRef<str>, width: usize, getter: Getter<G>) -> Self {
         Self {
             width,
             title: title.as_ref().into(),
@@ -110,11 +106,16 @@ impl Default for Columns<
             } else {
                 None
             }),
-            Column::new(&"Artist",  15, |entry: &Entry|entry.artist()).setter(setter!(set_artist)),
-            Column::new(&"Year",     4, |entry: &Entry|entry.year()).setter(setter!(set_year)),
-            Column::new(&"Release", 15, |entry: &Entry|entry.album()).setter(setter!(set_album)),
-            Column::new(&"Track",    5, |entry: &Entry|entry.track()).setter(setter!(set_track)),
-            Column::new(&"Title",   40, |entry: &Entry|entry.title()).setter(setter!(set_title)),
+            Column::new(&"Artist",  15, |entry: &Entry|entry.artist())
+                .setter(setter!(set_artist)),
+            Column::new(&"Year",     4, |entry: &Entry|entry.year())
+                .setter(setter!(set_year)),
+            Column::new(&"Release", 15, |entry: &Entry|entry.album())
+                .setter(setter!(set_album)),
+            Column::new(&"Track",    5, |entry: &Entry|entry.track())
+                .setter(setter!(set_track)),
+            Column::new(&"Title",   40, |entry: &Entry|entry.title())
+                .setter(setter!(set_title)),
         ])
     }
 }

src/model/entry.rs

@@ -267,6 +267,9 @@ macro_rules! music_tag_field {
             pub fn $get (&self) -> Option<Arc<str>> {
                 self.info.read().unwrap().$get()
             }
+            pub fn $del (&mut self) -> bool {
+                self.info.write().unwrap().$del()
+            }
             pub fn $set (&mut self, value: &impl AsRef<str>) -> bool {
                 self.info.write().unwrap().$set(value)
             }
@@ -283,6 +286,35 @@ macro_rules! music_tag_field {
                 }
                 None
             }
+            pub fn $del (&mut self) -> bool {
+                if let &mut Metadata::Music { ref original_tag, ref mut modified_tag, .. } = self {
+                    let old_value = original_tag.as_ref()
+                        .map(|m|m.$get().clone()).flatten();
+                    let new_value = modified_tag.as_ref()
+                        .map(|m|m.read().unwrap().$get().clone()).flatten();
+                    match (old_value, new_value) {
+                        (Some(old), Some(new)) => {
+                            let mut new_tag = modified_tag.as_ref().unwrap().write().unwrap();
+                            new_tag.$set(old);
+                            true
+                        },
+                        (None, Some(new)) => {
+                            let mut new_tag = modified_tag.as_ref().unwrap().write().unwrap();
+                            new_tag.$del();
+                            if new_tag.item_count() == 0 {
+                                std::mem::drop(new_tag);
+                                *modified_tag = None;
+                            }
+                            true
+                        },
+                        (_, None) => {
+                            false
+                        }
+                    }
+                } else {
+                    false
+                }
+            }
             pub fn $set (&mut self, value: &impl AsRef<str>) -> bool {
                 let value = value.as_ref().trim();
                 if let Ok(numeric_value) = value.parse::<u32>() && let &mut Metadata::Music {

src/view/table.rs

@@ -1,5 +1,4 @@
 use crate::*;
-use crate::ratatui::style::{Style, Stylize};
 
 pub struct TreeTable<'a>(pub(crate) &'a Taggart);