refactoring

kiln-tui/src/utils.rs

@@ -0,0 +1,43 @@
+use color::Rgba8;
+use ratatui::layout::Rect;
+use ratatui::prelude::{Color, Line, Span, Style};
+use kiln_core::log::LogLine;
+
+/// Converts a core [`Rgba8`] color into a ratatui truecolor [`Color`].
+///
+/// The alpha channel is dropped — terminals have no per-cell alpha. Truecolor
+/// requires terminal support; terminals limited to 256 colors approximate it.
+pub fn rgba8_to_color(c: Rgba8) -> Color {
+    Color::Rgb(c.r, c.g, c.b)
+}
+
+/// Converts a core [`LogLine`] into a styled ratatui [`Line`] for display.
+///
+/// Each [`LogSpan`](kiln_core::log::LogSpan) becomes a ratatui [`Span`]; a span's
+/// foreground/background color is applied only when present, so `None` colors
+/// inherit the surrounding (default) style.
+pub fn logline_to_line(line: &LogLine) -> Line<'static> {
+    let spans = line
+        .spans
+        .iter()
+        .map(|s| {
+            let mut style = Style::default();
+            if let Some(fg) = s.fg {
+                style = style.fg(rgba8_to_color(fg));
+            }
+            if let Some(bg) = s.bg {
+                style = style.bg(rgba8_to_color(bg));
+            }
+            Span::styled(s.text.clone(), style)
+        })
+        .collect::<Vec<_>>();
+    Line::from(spans)
+}
+
+/// Returns true if two `Rect`s share at least one cell.
+pub fn rects_overlap(a: Rect, b: Rect) -> bool {
+    a.x < b.x + b.width
+        && b.x < a.x + a.width
+        && a.y < b.y + b.height
+        && b.y < a.y + a.height
+}