edit: implement the actual save operation

We save palettes in the format that can be directly re-parsed by
vtcol.

1 files changed, 61 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 021f25a..8ecc4a6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1125,6 +1125,67 @@ impl From<&RawPalette> for Palette
     }
 }
 
+#[cfg(feature = "gui")]
+impl From<&[slint::Color]> for Palette
+{
+    fn from(colors: &[slint::Color]) -> Self
+    {
+        let mut idx: usize = 0;
+        let mut pal: [u8; PALETTE_BYTES] = [0; PALETTE_BYTES];
+
+        for &col in colors.iter() {
+            pal[idx] = col.red();
+            pal[idx + 1] = col.green();
+            pal[idx + 2] = col.blue();
+            idx += 3;
+        }
+
+        Self(pal)
+    }
+}
+
+/** Convert palette to the default text format so it can be parsed as a scheme. */
+impl Into<String> for Palette
+{
+    fn into(self) -> String
+    {
+        let mut acc = String::with_capacity(16 * 10);
+        for i in 0..PALETTE_SIZE {
+            let idx = i * 3;
+            let (r, g, b) = (self.0[idx], self.0[idx + 1], self.0[idx + 2]);
+            acc.push_str(&format!("{}#{:02.x}{:02.x}{:02.x}\n", i, r, g, b));
+        }
+        acc
+    }
+}
+
+#[test]
+fn palette_dump_as_text()
+{
+    let pal = Palette::from(&SOLARIZED_COLORS_DARK);
+    let txt = indoc::indoc! { r#"
+        0#002b36
+        1#dc322f
+        2#859900
+        3#b58900
+        4#268bd2
+        5#d33682
+        6#2aa198
+        7#eee8d5
+        8#002b36
+        9#cb4b16
+        10#586e75
+        11#657b83
+        12#839496
+        13#6c71c4
+        14#93a1a1
+        15#fdf6e3
+    "#};
+
+    let pal: String = pal.into();
+    assert_eq!(pal, txt);
+}
+
 pub struct PaletteIterator
 {
     pal: Palette,