Render!

2022/Cargo.lock

@@ -26,6 +26,7 @@ dependencies = [
  "path-absolutize",
  "regex",
  "serde",
+ "termcolor",
 ]
 
 [[package]]
@@ -139,8 +140,48 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "termcolor"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bab24d30b911b2376f3a13cc2cd443142f0c81dda04c118693e35b3835757755"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

2022/Cargo.toml

@@ -9,3 +9,4 @@ itertools = "0.10.5"
 path-absolutize = "3.0.14"
 regex = "1.7.0"
 serde = { version = "1.0.149", features = ["derive"] }
+termcolor = "1.1.3"

2022/src/bin/day12.rs

@@ -1,10 +1,17 @@
 use std::collections::{HashMap, HashSet, VecDeque};
+use std::io::Write;
+
+use termcolor::{BufferWriter, Color, ColorChoice, ColorSpec, WriteColor};
 
 const INPUT: &str = include_str!("../../input/day12.txt");
 
 fn main() {
     let (hill, start, goal) = Hill::parse(INPUT);
 
+    palette().unwrap();
+    println!();
+    render(INPUT).unwrap();
+
     println!("Part 1: {}", part1(&hill, start, goal));
     println!("Part 2: {}", part2(&hill, goal));
 }
@@ -121,3 +128,54 @@ impl Hill {
         a
     }
 }
+
+fn render(text: &str) -> anyhow::Result<()> {
+    let writer = BufferWriter::stderr(ColorChoice::Always);
+    let mut buf = writer.buffer();
+
+    for line in aoc::lines(text) {
+        for c in line.chars() {
+            buf.set_color(&color(c))?;
+            write!(&mut buf, "█")?;
+        }
+        writeln!(&mut buf)?;
+    }
+
+    buf.set_color(ColorSpec::new().set_reset(true))?;
+    writer.print(&buf)?;
+    Ok(())
+}
+
+fn color(c: char) -> ColorSpec {
+    let mut color = ColorSpec::new();
+    let spec = match c {
+        'S' => Color::Blue,
+        'E' => Color::Green,
+        c => {
+            let elev = (c as u64) - ('a' as u64);
+            let gray = (elev * 256 / 26) as u8;
+            Color::Rgb(gray, gray, gray)
+        }
+    };
+    color.set_fg(Some(spec));
+    color
+}
+
+fn palette() -> anyhow::Result<()> {
+    let writer = BufferWriter::stderr(ColorChoice::Always);
+    let mut buf = writer.buffer();
+
+    let alphabet = "abcdefghijklmnopqrstuvwxyz";
+
+    writeln!(&mut buf, "{}", alphabet)?;
+
+    for c in alphabet.chars() {
+        buf.set_color(&color(c))?;
+        write!(&mut buf, "█")?;
+    }
+    writeln!(&mut buf)?;
+
+    buf.set_color(ColorSpec::new().set_reset(true))?;
+    writer.print(&buf)?;
+    Ok(())
+}