feat: display indicator when need saving

src/components/tabs.rs

@@ -10,7 +10,13 @@ pub fn view<'a>(files: &'a [File], active_index: usize) -> Element<'a, Message>
   let tabs = files.iter().enumerate().map(|(index, file)| {
     let is_focused = index == active_index;
 
-    let label = text(file.display_name());
+    let label_text = if file.needs_saving() {
+      format!("● {}", file.display_name())
+    } else {
+      file.display_name().to_owned()
+    };
+
+    let label = text(label_text);
     let close_btn = button(text("x"))
       .padding(1)
       .on_press(Message::FileActionSelected(FileAction::Close(Some(index))));

src/file.rs

@@ -6,6 +6,7 @@ use std::{
 use iced::widget::{markdown, text_editor};
 
 pub struct File {
+  needs_saving: bool,
   content: text_editor::Content,
   path: Option<PathBuf>,
   markdown: Vec<markdown::Item>,
@@ -14,6 +15,7 @@ pub struct File {
 impl Default for File {
   fn default() -> Self {
     File {
+      needs_saving: false,
       content: text_editor::Content::new(),
       path: None,
       markdown: Vec::new(),
@@ -27,6 +29,7 @@ impl File {
     let markdown = markdown::parse(content).collect();
 
     File {
+      needs_saving: false,
       content: text_editor_content,
       path,
       markdown,
@@ -90,4 +93,12 @@ impl File {
       .map(|p| p.to_string_lossy().to_string())
       .unwrap_or_default()
   }
+  
+  pub fn needs_saving(&self) ->  bool {
+      self.needs_saving
+  }
+
+  pub fn set_needs_saving(&mut self, state: bool) {
+      self.needs_saving = state
+  }
 }

src/handler.rs

@@ -62,6 +62,7 @@ pub fn saved_file(state: &mut State, result: Result<PathBuf, String>) -> Task<Me
   match result {
     Ok(path) => {
       state.set_active_file_path(path);
+      state.set_active_file_save_status(false);
     }
     Err(_error) => {}
   };

src/state.rs

@@ -37,8 +37,16 @@ impl State {
     }
   }
 
+  pub fn set_active_file_save_status(&mut self, status: bool) {
+    self.files[self.current_file].set_needs_saving(status);
+  }
+
   pub fn apply_edit(&mut self, action: text_editor::Action) {
-    self.files[self.current_file].content_mut().perform(action);
+    self.files[self.current_file].content_mut().perform(action.clone());
+    
+    if matches!(action, text_editor::Action::Edit(_)) {
+      self.files[self.current_file].set_needs_saving(true);
+    }
   }
 
   pub fn new_file(&mut self) {