1 files changed, 89 insertions, 0 deletions
diff --git a/vendor/papergrid/src/colors.rs b/vendor/papergrid/src/colors.rs
new file mode 100644
index 000000000..f671ec005
--- /dev/null
+++ b/vendor/papergrid/src/colors.rs
@@ -0,0 +1,89 @@
+//! A module which contains [Colors] trait and its blanket implementations.
+
+use crate::{color::Color, config::Position};
+
+/// A trait which represents map of colors.
+pub trait Colors {
+    /// Color implementation.
+    type Color: Color;
+
+    /// Returns a color for a given position.
+    fn get_color(&self, pos: (usize, usize)) -> Option<&Self::Color>;
+}
+
+impl<C> Colors for &'_ C
+where
+    C: Colors,
+{
+    type Color = C::Color;
+
+    fn get_color(&self, pos: Position) -> Option<&Self::Color> {
+        C::get_color(self, pos)
+    }
+}
+
+#[cfg(feature = "std")]
+impl<C> Colors for std::collections::HashMap<Position, C>
+where
+    C: Color,
+{
+    type Color = C;
+
+    fn get_color(&self, pos: Position) -> Option<&Self::Color> {
+        self.get(&pos)
+    }
+}
+
+#[cfg(feature = "std")]
+impl<C> Colors for std::collections::BTreeMap<Position, C>
+where
+    C: Color,
+{
+    type Color = C;
+
+    fn get_color(&self, pos: Position) -> Option<&Self::Color> {
+        self.get(&pos)
+    }
+}
+
+#[cfg(feature = "std")]
+impl<C> Colors for crate::config::spanned::EntityMap<Option<C>>
+where
+    C: Color,
+{
+    type Color = C;
+
+    fn get_color(&self, pos: Position) -> Option<&Self::Color> {
+        self.get(pos.into()).as_ref()
+    }
+}
+
+/// The structure represents empty [`Colors`] map.
+#[derive(Debug, Default, Clone)]
+pub struct NoColors;
+
+impl Colors for NoColors {
+    type Color = EmptyColor;
+
+    fn get_color(&self, _: Position) -> Option<&Self::Color> {
+        None
+    }
+}
+
+/// A color which is actually has not value.
+#[derive(Debug)]
+pub struct EmptyColor;
+
+impl Color for EmptyColor {
+    fn fmt_prefix<W: core::fmt::Write>(&self, _: &mut W) -> core::fmt::Result {
+        Ok(())
+    }
+
+    fn colorize<W: core::fmt::Write>(&self, _: &mut W, _: &str) -> core::fmt::Result {
+        Ok(())
+    }
+
+    fn fmt_suffix<W: core::fmt::Write>(&self, _: &mut W) -> core::fmt::Result {
+        Ok(())
+    }
+}