Inline tui as helix-tui fork.

We only rely on some of the rendering primitives and implement our
Cursive-style compositor on top.

1 files changed, 36 insertions, 0 deletions

diff --git a/helix-tui/src/widgets/clear.rs b/helix-tui/src/widgets/clear.rs
new file mode 100644
index 00000000..d1da40de
--- /dev/null
+++ b/helix-tui/src/widgets/clear.rs
@@ -0,0 +1,36 @@
+use crate::buffer::Buffer;
+use crate::layout::Rect;
+use crate::widgets::Widget;
+
+/// A widget to to clear/reset a certain area to allow overdrawing (e.g. for popups)
+///
+/// # Examples
+///
+/// ```
+/// # use helix_tui::widgets::{Clear, Block, Borders};
+/// # use helix_tui::layout::Rect;
+/// # use helix_tui::Frame;
+/// # use helix_tui::backend::Backend;
+/// fn draw_on_clear<B: Backend>(f: &mut Frame<B>, area: Rect) {
+///     let block = Block::default().title("Block").borders(Borders::ALL);
+///     f.render_widget(Clear, area); // <- this will clear/reset the area first
+///     f.render_widget(block, area); // now render the block widget
+/// }
+/// ```
+///
+/// # Popup Example
+///
+/// For a more complete example how to utilize `Clear` to realize popups see
+/// the example `examples/popup.rs`
+#[derive(Debug, Clone)]
+pub struct Clear;
+
+impl Widget for Clear {
+    fn render(self, area: Rect, buf: &mut Buffer) {
+        for x in area.left()..area.right() {
+            for y in area.top()..area.bottom() {
+                buf.get_mut(x, y).reset();
+            }
+        }
+    }
+}