From adc525cf75a08eef7aa96c7ca56eef5617becc06 Mon Sep 17 00:00:00 2001
From: Philipp Gesang <phg@phi-gamma.net>
Date: Sun, 7 Aug 2022 11:55:44 +0200
Subject: edit: present color palette

No actual editing functionality yet, just the colors layed out
as squares on an 8?2 grid.
---
 src/lib.rs | 50 +++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 49 insertions(+), 1 deletion(-)

(limited to 'src/lib.rs')

diff --git a/src/lib.rs b/src/lib.rs
index 5032f68..021f25a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -846,14 +846,17 @@ macro_rules! byte_of_hex {
     };
 }
 
-struct Rgb(u8, u8, u8);
+pub struct Rgb(pub u8, pub u8, pub u8);
 
 impl Rgb
 {
+    #[inline]
     fn r(&self) -> u8 { self.0 }
 
+    #[inline]
     fn g(&self) -> u8 { self.1 }
 
+    #[inline]
     fn b(&self) -> u8 { self.2 }
 }
 
@@ -871,6 +874,18 @@ impl TryFrom<&[u8; 6]> for Rgb
     }
 }
 
+impl From<[u8; 3]> for Rgb
+{
+    fn from(bytes: [u8; 3]) -> Self
+    {
+        let r = bytes[0];
+        let g = bytes[1];
+        let b = bytes[2];
+
+        Self(r, g, b)
+    }
+}
+
 impl From<u32> for Rgb
 {
     fn from(rgb: u32) -> Self
@@ -1028,6 +1043,7 @@ impl Palette
         Ok(res)
     }
 
+    pub fn iter(&self) -> PaletteIterator { PaletteIterator::new(&self) }
     /* [Palette::from_stdin] */
 } /* [impl Palette] */
 
@@ -1109,6 +1125,38 @@ impl From<&RawPalette> for Palette
     }
 }
 
+pub struct PaletteIterator
+{
+    pal: Palette,
+    cur: usize,
+}
+
+impl PaletteIterator
+{
+    fn new(pal: &Palette) -> Self { Self { pal: pal.clone(), cur: 0 } }
+}
+
+impl Iterator for PaletteIterator
+{
+    type Item = Rgb;
+
+    fn next(&mut self) -> Option<Self::Item>
+    {
+        if self.cur >= PALETTE_SIZE {
+            None
+        } else {
+            let off = self.cur * 3;
+            let rgb = Rgb::from([
+                self.pal.0[off],
+                self.pal.0[off + 1],
+                self.pal.0[off + 2],
+            ]);
+            self.cur += 1;
+            Some(rgb)
+        }
+    }
+}
+
 const CONSOLE_PATHS: [&str; 6] = [
     "/proc/self/fd/0",
     "/dev/tty",
-- 
cgit v1.2.3