Log panel

kiln-tui/src/render.rs

@@ -8,9 +8,11 @@
 use crate::cp437::tile_to_char;
 use color::Rgba8;
 use kiln_core::game::{Board, Glyph};
+use kiln_core::log::LogLine;
 use ratatui::buffer::Buffer;
 use ratatui::layout::Rect;
-use ratatui::style::Color;
+use ratatui::style::{Color, Style};
+use ratatui::text::{Line, Span};
 use ratatui::widgets::Widget;
 
 /// Converts a core [`Rgba8`] color into a ratatui truecolor [`Color`].
@@ -21,6 +23,29 @@ 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)
+}
+
 /// A ratatui widget that draws a [`Board`] (with objects and the player) into a
 /// rectangular area, scrolled so the player stays visible on larger boards.
 pub struct BoardWidget<'a> {