add ratatui crate support

Cargo.toml

@@ -40,7 +40,6 @@ ratatui = { version = "0.20.1", default-features = false, optional = true }
 
 [[example]]
 name = "minimal"
-required-features = ["crossterm"]
 
 [[example]]
 name = "termion"

examples/minimal.rs

@@ -1,13 +1,26 @@
+#[cfg(feature = "ratatui-crossterm")]
+use crossterm_026 as crossterm;
+
 use crossterm::event::{DisableMouseCapture, EnableMouseCapture};
 use crossterm::terminal::{
     disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen,
 };
 use std::io;
-use tui::backend::CrosstermBackend;
-use tui::widgets::{Block, Borders};
-use tui::Terminal;
 use tui_textarea::{Input, Key, TextArea};
 
+#[cfg(feature = "ratatui-crossterm")]
+use ratatui::{
+    backend::CrosstermBackend,
+    widgets::{Block, Borders},
+    Terminal,
+};
+#[cfg(feature = "crossterm")]
+use tui::{
+    backend::CrosstermBackend,
+    widgets::{Block, Borders},
+    Terminal,
+};
+
 fn main() -> io::Result<()> {
     let stdout = io::stdout();
     let mut stdout = stdout.lock();

src/highlight.rs

@@ -1,8 +1,8 @@
+use crate::tui::style::Style;
+use crate::tui::text::{Span, Spans};
 use crate::util::{num_digits, spaces};
 use std::borrow::Cow;
 use std::cmp::Ordering;
-use tui::style::Style;
-use tui::text::{Span, Spans};
 
 enum Boundary {
     Cursor(Style),

src/input.rs

@@ -1,11 +1,11 @@
-#[cfg(feature = "arbitrary")]
+#[cfg(any(feature = "crossterm", feature = "ratatui-crossterm"))]
-use arbitrary::Arbitrary;
+use crate::crossterm::event::{
-#[cfg(feature = "crossterm")]
-use crossterm::event::{
     Event as CrosstermEvent, KeyCode, KeyEvent, KeyModifiers, MouseEvent as CrosstermMouseEvent,
     MouseEventKind as CrosstermMouseEventKind,
 };
-#[cfg(feature = "termion")]
+#[cfg(feature = "arbitrary")]
+use arbitrary::Arbitrary;
+#[cfg(any(feature = "termion", feature = "ratatui-termion"))]
 use termion::event::{Event as TermionEvent, Key as TermionKey, MouseEvent as TermionMouseEvent};
 
 /// Backend-agnostic key input kind.
@@ -95,7 +95,7 @@ impl Default for Input {
     }
 }
 
-#[cfg(feature = "crossterm")]
+#[cfg(any(feature = "crossterm", feature = "ratatui-crossterm"))]
 impl From<CrosstermEvent> for Input {
     /// Convert [`crossterm::event::Event`] to [`Input`].
     fn from(event: CrosstermEvent) -> Self {
@@ -107,7 +107,7 @@ impl From<CrosstermEvent> for Input {
     }
 }
 
-#[cfg(feature = "crossterm")]
+#[cfg(any(feature = "crossterm", feature = "ratatui-crossterm"))]
 impl From<KeyEvent> for Input {
     /// Convert [`crossterm::event::KeyEvent`] to [`Input`].
     fn from(key: KeyEvent) -> Self {
@@ -135,7 +135,7 @@ impl From<KeyEvent> for Input {
     }
 }
 
-#[cfg(feature = "crossterm")]
+#[cfg(any(feature = "crossterm", feature = "ratatui-crossterm"))]
 impl From<CrosstermMouseEvent> for Input {
     /// Convert [`crossterm::event::MouseEvent`] to [`Input`].
     fn from(mouse: CrosstermMouseEvent) -> Self {
@@ -150,7 +150,7 @@ impl From<CrosstermMouseEvent> for Input {
     }
 }
 
-#[cfg(feature = "termion")]
+#[cfg(any(feature = "termion", feature = "ratatui-termion"))]
 impl From<TermionEvent> for Input {
     /// Convert [`termion::event::Event`] to [`Input`].
     fn from(event: TermionEvent) -> Self {
@@ -162,7 +162,7 @@ impl From<TermionEvent> for Input {
     }
 }
 
-#[cfg(feature = "termion")]
+#[cfg(any(feature = "termion", feature = "ratatui-termion"))]
 impl From<TermionKey> for Input {
     /// Convert [`termion::event::Key`] to [`Input`].
     fn from(key: TermionKey) -> Self {
@@ -201,7 +201,7 @@ impl From<TermionKey> for Input {
     }
 }
 
-#[cfg(feature = "termion")]
+#[cfg(any(feature = "termion", feature = "ratatui-termion"))]
 impl From<TermionMouseEvent> for Input {
     /// Convert [`termion::event::MouseEvent`] to [`Input`].
     fn from(mouse: TermionMouseEvent) -> Self {

src/lib.rs

@@ -1,9 +1,15 @@
-#![allow(clippy::needless_range_loop)]
 #![forbid(unsafe_code)]
+#![allow(clippy::needless_range_loop)]
 #![warn(clippy::dbg_macro, clippy::print_stdout)]
 #![cfg_attr(docsrs, feature(doc_cfg))]
 #![doc = include_str!("../README.md")]
 
+#[cfg(all(
+    any(feature = "crossterm", feature = "termion"),
+    any(feature = "ratatui-crossterm", feature = "ratatui-termion"),
+))]
+compile_error!("tui-rs support and ratatui support are exclussive. only one of them can be enabled at the same time. see https://github.com/rhysd/tui-textarea");
+
 mod cursor;
 mod highlight;
 mod history;
@@ -16,6 +22,18 @@ mod util;
 mod widget;
 mod word;
 
+#[cfg(any(feature = "ratatui-crossterm", feature = "ratatui-termion"))]
+use ratatui as tui;
+#[cfg(not(any(feature = "ratatui-crossterm", feature = "ratatui-termion")))]
+#[allow(clippy::single_component_path_imports)]
+use tui;
+
+#[cfg(not(feature = "ratatui-crossterm"))]
+#[allow(clippy::single_component_path_imports)]
+use crossterm;
+#[cfg(feature = "ratatui-crossterm")]
+use crossterm_026 as crossterm;
+
 pub use cursor::CursorMove;
 pub use input::{Input, Key};
 pub use scroll::Scrolling;

src/search.rs

@@ -1,5 +1,5 @@
+use crate::tui::style::{Color, Style};
 use regex::Regex;
-use tui::style::{Color, Style};
 
 #[derive(Clone)]
 pub struct Search {

src/textarea.rs

@@ -5,13 +5,13 @@ use crate::input::{Input, Key};
 use crate::scroll::Scrolling;
 #[cfg(feature = "search")]
 use crate::search::Search;
+use crate::tui::layout::Alignment;
+use crate::tui::style::{Modifier, Style};
+use crate::tui::text::Spans;
+use crate::tui::widgets::{Block, Widget};
 use crate::util::spaces;
 use crate::widget::{Renderer, Viewport};
 use crate::word::{find_word_end_forward, find_word_start_backward};
-use tui::layout::Alignment;
-use tui::style::{Modifier, Style};
-use tui::text::Spans;
-use tui::widgets::{Block, Widget};
 
 /// A type to manage state of textarea.
 ///

src/widget.rs

@@ -1,11 +1,11 @@
 use crate::textarea::TextArea;
+use crate::tui::buffer::Buffer;
+use crate::tui::layout::Rect;
+use crate::tui::text::Text;
+use crate::tui::widgets::{Paragraph, Widget};
 use crate::util::num_digits;
 use std::cmp;
 use std::sync::atomic::{AtomicU64, Ordering};
-use tui::buffer::Buffer;
-use tui::layout::Rect;
-use tui::text::Text;
-use tui::widgets::{Paragraph, Widget};
 
 // &mut 'a (u16, u16, u16, u16) is not available since Renderer instance totally takes over the ownership of TextArea
 // instance. In the case, the TextArea instance cannot be accessed from any other objects since it is mutablly