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docs(terminal): document buffer diffing better (#852)

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Valentin271 2024-01-19 17:44:50 +01:00 committed by GitHub
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3 changed files with 10 additions and 5 deletions
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3
src/lib.rs
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@ -86,7 +86,8 @@
//!
//! The drawing logic is delegated to a closure that takes a [`Frame`] instance as argument. The
//! [`Frame`] provides the size of the area to draw to and allows the app to render any [`Widget`]
//! using the provided [`render_widget`] method. See the [Widgets] section of the [Ratatui Website]
//! using the provided [`render_widget`] method. After this closure returns, a diff is performed and
//! only the changes are drawn to the terminal. See the [Widgets] section of the [Ratatui Website]
//! for more info.
//!
//! ### Handling events

6
src/terminal/frame.rs
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@ -8,9 +8,9 @@ use crate::{
/// This is obtained via the closure argument of [`Terminal::draw`]. It is used to render widgets
/// to the terminal and control the cursor position.
///
/// The changes drawn to the frame are applied only to the current [`Buffer`].
/// After the closure returns, the current buffer is compared to the previous
/// buffer and only the changes are applied to the terminal.
/// The changes drawn to the frame are applied only to the current [`Buffer`]. After the closure
/// returns, the current buffer is compared to the previous buffer and only the changes are applied
/// to the terminal. This avoids drawing redundant cells.
///
/// [`Buffer`]: crate::buffer::Buffer
#[derive(Debug, Hash)]

6
src/terminal/terminal.rs
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@ -16,7 +16,7 @@ use crate::{backend::ClearType, prelude::*};
/// When the widgets are drawn, the changes are accumulated in the current buffer.
/// At the end of each draw pass, the two buffers are compared, and only the changes
/// between these buffers are written to the terminal, avoiding any redundant operations.
/// After flushing these changes, the buffers are swapped to prepare for the next draw cycle./
/// After flushing these changes, the buffers are swapped to prepare for the next draw cycle.
///
/// The terminal also has a viewport which is the area of the terminal that is currently visible to
/// the user. It can be either fullscreen, inline or fixed. See [`Viewport`] for more information.
@ -239,6 +239,10 @@ where
///
/// This is the main entry point for drawing to the terminal.
///
/// The changes drawn to the frame are applied only to the current [`Buffer`]. After the closure
/// returns, the current buffer is compared to the previous buffer and only the changes are
/// applied to the terminal.
///
/// # Examples
///
/// ```rust,no_run