docs: use Frame::area() instead of size() in examples (#1361)

`Frame::size()` is deprecated

README.md

@@ -4,14 +4,18 @@
 - [Ratatui](#ratatui)
   - [Installation](#installation)
   - [Introduction](#introduction)
-  - [Other Documentation](#other-documentation)
+  - [Other documentation](#other-documentation)
   - [Quickstart](#quickstart)
+    - [Initialize and restore the terminal](#initialize-and-restore-the-terminal)
+    - [Drawing the UI](#drawing-the-ui)
+    - [Handling events](#handling-events)
+    - [Example](#example)
+  - [Layout](#layout)
+  - [Text and styling](#text-and-styling)
   - [Status of this fork](#status-of-this-fork)
-  - [Rust version requirements](#rust-version-requirements)
   - [Widgets](#widgets)
     - [Built in](#built-in)
-    - [Third\-party libraries, bootstrapping templates and
+    - [Third-party libraries, bootstrapping templates and widgets](#third-party-libraries-bootstrapping-templates-and-widgets)
-      widgets](#third-party-libraries-bootstrapping-templates-and-widgets)
   - [Apps](#apps)
   - [Alternatives](#alternatives)
   - [Acknowledgments](#acknowledgments)
@@ -170,7 +174,7 @@ fn handle_events() -> io::Result<bool> {
 fn ui(frame: &mut Frame) {
     frame.render_widget(
         Paragraph::new("Hello World!").block(Block::bordered().title("Greeting")),
-        frame.size(),
+        frame.area(),
     );
 }
 ```
@@ -199,7 +203,7 @@ fn ui(frame: &mut Frame) {
         Constraint::Min(0),
         Constraint::Length(1),
     ])
-    .areas(frame.size());
+    .areas(frame.area());
     let [left_area, right_area] =
         Layout::horizontal([Constraint::Percentage(50), Constraint::Percentage(50)])
             .areas(main_area);
@@ -237,7 +241,7 @@ use ratatui::{
 };
 
 fn ui(frame: &mut Frame) {
-    let areas = Layout::vertical([Constraint::Length(1); 4]).split(frame.size());
+    let areas = Layout::vertical([Constraint::Length(1); 4]).split(frame.area());
 
     let line = Line::from(vec![
         Span::raw("Hello "),

src/layout/layout.rs

@@ -428,7 +428,7 @@ impl Layout {
     /// ```rust
     /// # use ratatui::prelude::*;
     /// # fn render(frame: &mut Frame) {
-    /// let area = frame.size();
+    /// let area = frame.area();
     /// let layout = Layout::vertical([Constraint::Length(1), Constraint::Min(0)]);
     /// let [top, main] = layout.areas(area);
     ///
@@ -460,7 +460,7 @@ impl Layout {
     /// ```rust
     /// # use ratatui::prelude::*;
     /// # fn render(frame: &mut Frame) {
-    /// let area = frame.size();
+    /// let area = frame.area();
     /// let layout = Layout::vertical([Constraint::Length(1), Constraint::Min(0)]);
     /// let [top, main] = layout.areas(area);
     /// let [before, inbetween, after] = layout.spacers(area);

src/layout/rect.rs

@@ -236,7 +236,7 @@ impl Rect {
     /// ```rust
     /// # use ratatui::prelude::*;
     /// # fn render(frame: &mut Frame) {
-    /// let area = frame.size();
+    /// let area = frame.area();
     /// let rect = Rect::new(0, 0, 100, 100).clamp(area);
     /// # }
     /// ```

src/lib.rs

@@ -151,7 +151,7 @@
 //!         Constraint::Min(0),
 //!         Constraint::Length(1),
 //!     ])
-//!     .areas(frame.size());
+//!     .areas(frame.area());
 //!     let [left_area, right_area] =
 //!         Layout::horizontal([Constraint::Percentage(50), Constraint::Percentage(50)])
 //!             .areas(main_area);
@@ -189,7 +189,7 @@
 //! };
 //!
 //! fn draw(frame: &mut Frame) {
-//!     let areas = Layout::vertical([Constraint::Length(1); 4]).split(frame.size());
+//!     let areas = Layout::vertical([Constraint::Length(1); 4]).split(frame.area());
 //!
 //!     let line = Line::from(vec![
 //!         Span::raw("Hello "),

src/terminal.rs

@@ -18,7 +18,7 @@
 //! let backend = CrosstermBackend::new(stdout());
 //! let mut terminal = Terminal::new(backend)?;
 //! terminal.draw(|frame| {
-//!     let area = frame.size();
+//!     let area = frame.area();
 //!     frame.render_widget(Paragraph::new("Hello world!"), area);
 //! })?;
 //! # std::io::Result::Ok(())

src/terminal/terminal.rs

@@ -38,7 +38,7 @@ use crate::{
 /// let backend = CrosstermBackend::new(stdout());
 /// let mut terminal = Terminal::new(backend)?;
 /// terminal.draw(|frame| {
-///     let area = frame.size();
+///     let area = frame.area();
 ///     frame.render_widget(Paragraph::new("Hello World!"), area);
 /// })?;
 /// # std::io::Result::Ok(())
@@ -283,7 +283,7 @@ where
     ///
     /// // with a closure
     /// terminal.draw(|frame| {
-    ///     let area = frame.size();
+    ///     let area = frame.area();
     ///     frame.render_widget(Paragraph::new("Hello World!"), area);
     ///     frame.set_cursor_position(Position { x: 0, y: 0 });
     /// })?;
@@ -292,7 +292,7 @@ where
     /// terminal.draw(render)?;
     ///
     /// fn render(frame: &mut ratatui::Frame) {
-    ///     frame.render_widget(Paragraph::new("Hello World!"), frame.size());
+    ///     frame.render_widget(Paragraph::new("Hello World!"), frame.area());
     /// }
     /// # std::io::Result::Ok(())
     /// ```
@@ -355,7 +355,7 @@ where
     /// // with a closure
     /// terminal.try_draw(|frame| {
     ///     let value: u8 = "not a number".parse().map_err(io::Error::other)?;
-    ///     let area = frame.size();
+    ///     let area = frame.area();
     ///     frame.render_widget(Paragraph::new("Hello World!"), area);
     ///     frame.set_cursor_position(Position { x: 0, y: 0 });
     ///     io::Result::Ok(())
@@ -366,7 +366,7 @@ where
     ///
     /// fn render(frame: &mut ratatui::Frame) -> io::Result<()> {
     ///     let value: u8 = "not a number".parse().map_err(io::Error::other)?;
-    ///     frame.render_widget(Paragraph::new("Hello World!"), frame.size());
+    ///     frame.render_widget(Paragraph::new("Hello World!"), frame.area());
     ///     Ok(())
     /// }
     /// # io::Result::Ok(())

src/text/span.rs

@@ -81,7 +81,7 @@ use crate::{prelude::*, style::Styled, text::StyledGrapheme};
 /// use ratatui::prelude::*;
 ///
 /// # fn render_frame(frame: &mut Frame) {
-/// frame.render_widget("test content".green().on_yellow().italic(), frame.size());
+/// frame.render_widget("test content".green().on_yellow().italic(), frame.area());
 /// # }
 /// ```
 /// [`Line`]: crate::text::Line

src/widgets.rs

@@ -88,7 +88,7 @@ use crate::{buffer::Buffer, layout::Rect, style::Style};
 /// # let mut terminal = Terminal::new(backend).unwrap();
 ///
 /// terminal.draw(|frame| {
-///     frame.render_widget(Clear, frame.size());
+///     frame.render_widget(Clear, frame.area());
 /// });
 /// ```
 ///

src/widgets/block.rs

@@ -595,7 +595,7 @@ impl<'a> Block<'a> {
     /// let outer_block = Block::bordered().title("Outer");
     /// let inner_block = Block::bordered().title("Inner");
     ///
-    /// let outer_area = frame.size();
+    /// let outer_area = frame.area();
     /// let inner_area = outer_block.inner(outer_area);
     ///
     /// frame.render_widget(outer_block, outer_area);

src/widgets/scrollbar.rs

@@ -59,7 +59,7 @@ use crate::{
 ///
 /// let mut scrollbar_state = ScrollbarState::new(items.len()).position(vertical_scroll);
 ///
-/// let area = frame.size();
+/// let area = frame.area();
 /// // Note we render the paragraph
 /// frame.render_widget(paragraph, area);
 /// // and the scrollbar, those are separate widgets