feat: add word wrap toggle functionality

Add the ability to toggle word wrap in the text editor with Alt+Z.
Word wrap can be enabled or disabled, affecting how long lines are
displayed in edit mode.

Changes:
- Add `is_word_wrap_on` state field with default value of false
- Implement `toggle_word_wrap()` and `is_word_wrap_on()` methods
- Add ToggleWordWrap variant to ViewAction enum
- Bind Alt+Z keyboard shortcut to toggle word wrap
- Refactor editor view to support dynamic wrapping behavior
  - Use responsive widget when wrap is enabled to constrain width
  - Apply Wrapping::WordOrGlyph when enabled, Wrapping::None otherwise
- Update editor view signature to accept word wrap state parameter
- Fix indentation inconsistencies in file.rs and state.rs

src/components/editor.rs

@@ -2,15 +2,28 @@ use iced::{
   Background, Element, Length, Theme,
   border::{self},
   highlighter,
-  widget::{container, markdown, row, scrollable, text_editor},
+  widget::{container, markdown, responsive, row, scrollable, text::Wrapping, text_editor},
 };
 
 use crate::{constants, file::File, message::Message, state::Mode};
 
-pub fn view<'a>(file: &'a File, mode: Mode, font_size: u32) -> Element<'a, Message> {
+pub fn view<'a>(
+  file: &'a File,
+  mode: Mode,
+  font_size: u32,
+  is_word_wrap_on: bool,
+) -> Element<'a, Message> {
   match mode {
     Mode::Edit => {
-      let editor = text_editor(file.content())
+      let wrapping = if is_word_wrap_on {
+        Wrapping::WordOrGlyph
+      } else {
+        Wrapping::None
+      };
+
+      let create_editor = move || {
+        text_editor(file.content())
+          .wrapping(wrapping)
           .highlight(
             file.extension().unwrap_or("txt"),
             highlighter::Theme::Base16Ocean,
@@ -28,9 +41,11 @@ pub fn view<'a>(file: &'a File, mode: Mode, font_size: u32) -> Element<'a, Messa
               ..base
             }
           })
-        .on_action(Message::Edit);
+          .on_action(Message::Edit)
+      };
 
-      scrollable(container(editor).height(Length::Fill))
+      let create_scrollable = |content: Element<'a, Message>| {
+        scrollable(content)
           .auto_scroll(true)
           .direction(scrollable::Direction::Both {
             vertical: scrollable::Scrollbar::default(),
@@ -46,14 +61,26 @@ pub fn view<'a>(file: &'a File, mode: Mode, font_size: u32) -> Element<'a, Messa
           })
           .anchor_bottom()
           .height(Length::Fill)
+      };
+
+      if is_word_wrap_on {
+        responsive(move |size| {
+          let editor = create_editor();
+          create_scrollable(container(editor).width(size.width).into()).into()
+        })
         .into()
+      } else {
+        let editor = create_editor();
+        create_scrollable(container(editor).height(Length::Fill).into())
+          .width(Length::Fill)
+          .into()
+      }
     }
     Mode::Preview => {
       let mut style: markdown::Style = Theme::Dark.into();
       style.font = constants::CUSTOM_FONT;
 
       let settings = markdown::Settings::with_text_size(font_size, style);
-
       let markdown_preview = markdown::view(file.markdown(), settings).map(Message::LinkClicked);
 
       scrollable(row![markdown_preview].padding(10))

src/handler.rs

@@ -76,6 +76,7 @@ pub fn view_action(state: &mut State, action: ViewAction) -> Task<Message> {
     ViewAction::Decrease => state.decrease_font(),
     ViewAction::Reset => state.reset_font(),
     ViewAction::TogglePreview => state.toggle_preview(),
+    ViewAction::ToggleWordWrap => state.toggle_word_wrap(),
   }
 
   Task::none()

src/key_bindings.rs

@@ -65,4 +65,9 @@ pub const ALL: &[Keybinding] = &[
     modifiers: Modifiers::CTRL,
     message: Message::ViewActionSelected(ViewAction::Reset),
   },
+  Keybinding {
+    key: "z",
+    modifiers: Modifiers::ALT,
+    message: Message::ViewActionSelected(ViewAction::ToggleWordWrap),
+  },
 ];

src/main.rs

@@ -12,7 +12,7 @@ mod state;
 use iced::theme::Palette;
 use iced::widget::column;
 use iced::window::icon;
-use iced::{Color, Theme};
+use iced::{Color, Length, Theme};
 use iced::{Element, Subscription, Task, event};
 use iced::{keyboard, window};
 
@@ -84,7 +84,12 @@ fn view(state: &State, _id: iced::window::Id) -> Element<'_, Message> {
   column![
     components::tabs::view(state.files(), state.current_file_index()),
     components::action_bar::view(state.selected_file_action(), state.selected_view_action()),
-    components::editor::view(current_file, state.mode(), state.font_size()),
+    components::editor::view(
+      current_file,
+      state.mode(),
+      state.font_size(),
+      state.is_word_wrap_on()
+    ),
     components::status_bar::view(current_file),
   ]
   .into()

src/message.rs

@@ -39,6 +39,7 @@ pub enum ViewAction {
   Decrease,
   Reset,
   TogglePreview,
+  ToggleWordWrap,
 }
 
 impl ViewAction {
@@ -47,6 +48,7 @@ impl ViewAction {
     ViewAction::Decrease,
     ViewAction::Reset,
     ViewAction::TogglePreview,
+    ViewAction::ToggleWordWrap,
   ];
 }
 
@@ -57,6 +59,7 @@ impl Display for ViewAction {
       ViewAction::Increase => write!(f, "Increase font"),
       ViewAction::Reset => write!(f, "Reset font"),
       ViewAction::TogglePreview => write!(f, "Toggle preview"),
+      ViewAction::ToggleWordWrap => write!(f, "Toggle word wrap"),
     }
   }
 }

src/state.rs

@@ -22,6 +22,7 @@ pub struct State {
   editor_font_size: u32,
   selected_file_action: Option<FileAction>,
   selected_view_action: Option<ViewAction>,
+  is_word_wrap_on: bool,
 }
 
 impl State {
@@ -33,6 +34,7 @@ impl State {
       files: vec![default_file],
       current_file: 0,
       editor_font_size: constants::DEFAULT_EDITOR_FONT_SIZE,
+      is_word_wrap_on: false,
       ..Default::default()
     }
   }
@@ -42,7 +44,9 @@ impl State {
   }
 
   pub fn apply_edit(&mut self, action: text_editor::Action) {
-    self.files[self.current_file].content_mut().perform(action.clone());
+    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);
@@ -129,6 +133,14 @@ impl State {
     }
   }
 
+  pub fn toggle_word_wrap(&mut self) {
+    self.is_word_wrap_on = !self.is_word_wrap_on;
+  }
+
+  pub fn is_word_wrap_on(&self) -> bool {
+    self.is_word_wrap_on
+  }
+
   pub fn files(&self) -> &[file::File] {
     &self.files
   }