Add auto-indent support

Cargo.lock

@@ -897,7 +897,7 @@ dependencies = [
 [[package]]
 name = "cosmic-text"
 version = "0.10.0"
-source = "git+https://github.com/pop-os/cosmic-text?branch=vi-editor#1207fd6d804b76b52137a368a58b27150eb865b8"
+source = "git+https://github.com/pop-os/cosmic-text?branch=vi-editor#7d21045b2f93a382f7ddea209b8f28204888d418"
 dependencies = [
  "cosmic_undo_2",
  "fontdb 0.16.0",

src/config.rs

@@ -142,6 +142,7 @@ impl fmt::Display for KeyBind {
 #[derive(Clone, CosmicConfigEntry, Debug, Deserialize, Eq, PartialEq, Serialize)]
 pub struct Config {
     pub app_theme: AppTheme,
+    pub auto_indent: bool,
     pub font_name: String,
     pub font_size: u16,
     pub syntax_theme_dark: String,
@@ -156,6 +157,7 @@ impl Default for Config {
     fn default() -> Self {
         Self {
             app_theme: AppTheme::System,
+            auto_indent: true,
             font_name: "Fira Mono".to_string(),
             font_size: 14,
             syntax_theme_dark: "gruvbox-dark".to_string(),

src/main.rs

@@ -135,6 +135,7 @@ pub enum Message {
     TabClose(segmented_button::Entity),
     TabWidth(u16),
     Todo,
+    ToggleAutoIndent,
     ToggleContextPage(ContextPage),
     ToggleWordWrap,
     Undo,
@@ -835,6 +836,10 @@ impl Application for App {
             Message::Todo => {
                 log::warn!("TODO");
             }
+            Message::ToggleAutoIndent => {
+                self.config.auto_indent = !self.config.auto_indent;
+                return self.save_config();
+            }
             Message::ToggleContextPage(context_page) => {
                 if self.context_page == context_page {
                     self.core.window.show_context = !self.core.window.show_context;

src/menu.rs

@@ -160,7 +160,11 @@ pub fn menu_bar<'a>(config: &Config) -> Element<'a, Message> {
                 MenuTree::with_children(
                     menu_folder(fl!("indentation")),
                     vec![
-                        menu_item(fl!("automatic-indentation"), Message::Todo),
+                        menu_checkbox(
+                            fl!("automatic-indentation"),
+                            config.auto_indent,
+                            Message::ToggleAutoIndent,
+                        ),
                         MenuTree::new(horizontal_rule(1)),
                         menu_tab_width(1),
                         menu_tab_width(2),

src/tab.rs

@@ -43,6 +43,7 @@ impl Tab {
         let mut editor = self.editor.lock().unwrap();
         let mut font_system = FONT_SYSTEM.lock().unwrap();
         let mut editor = editor.borrow_with(&mut font_system);
+        editor.set_auto_indent(config.auto_indent);
         editor.set_passthrough(!config.vim_bindings);
         editor.set_tab_width(config.tab_width);
         editor.buffer_mut().set_wrap(if config.word_wrap {