commit 22a9742102a7f9b8612cdf0919ee377c9b08fe09
Author: markichnich <markichnich@proton.me>
Date:   Mon Aug 14 23:08:37 2023 +0200

    get basic tui set up

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..2642848
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,261 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "bitflags"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4682ae6287fcf752ecaabbfcc7b6f9b72aa33933dc23a554d853aea8eea8635"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "crossterm"
+version = "0.27.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f476fe445d41c9e991fd07515a6f463074b782242ccf4a5b7b1d1012e70824df"
+dependencies = [
+ "bitflags 2.4.0",
+ "crossterm_winapi",
+ "libc",
+ "mio",
+ "parking_lot",
+ "signal-hook",
+ "signal-hook-mio",
+ "winapi",
+]
+
+[[package]]
+name = "crossterm_winapi"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "acdd7c62a3665c7f6830a51635d9ac9b23ed385797f70a83bb8bafe9c572ab2b"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.147"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4668fb0ea861c1df094127ac5f1da3409a82116a4ba74fca2e58ef927159bb3"
+
+[[package]]
+name = "lock_api"
+version = "0.4.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1cc9717a20b1bb222f333e6a92fd32f7d8a18ddc5a3191a11af45dcbf4dcd16"
+dependencies = [
+ "autocfg",
+ "scopeguard",
+]
+
+[[package]]
+name = "log"
+version = "0.4.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
+
+[[package]]
+name = "mio"
+version = "0.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "927a765cd3fc26206e66b296465fa9d3e5ab003e651c1b3c060e7956d96b19d2"
+dependencies = [
+ "libc",
+ "log",
+ "wasi",
+ "windows-sys",
+]
+
+[[package]]
+name = "parking_lot"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
+dependencies = [
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.9.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93f00c865fe7cabf650081affecd3871070f26767e7b2070a3ffae14c654b447"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "windows-targets",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "567664f262709473930a4bf9e51bf2ebf3348f2e748ccc50dea20646858f8f29"
+dependencies = [
+ "bitflags 1.3.2",
+]
+
+[[package]]
+name = "scopeguard"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
+
+[[package]]
+name = "shdoku"
+version = "0.1.0"
+dependencies = [
+ "crossterm",
+]
+
+[[package]]
+name = "signal-hook"
+version = "0.3.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8621587d4798caf8eb44879d42e56b9a93ea5dcd315a6487c357130095b62801"
+dependencies = [
+ "libc",
+ "signal-hook-registry",
+]
+
+[[package]]
+name = "signal-hook-mio"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "29ad2e15f37ec9a6cc544097b78a1ec90001e9f71b81338ca39f430adaca99af"
+dependencies = [
+ "libc",
+ "mio",
+ "signal-hook",
+]
+
+[[package]]
+name = "signal-hook-registry"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d8229b473baa5980ac72ef434c4415e70c4b5e71b423043adb4ba059f89c99a1"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "smallvec"
+version = "1.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62bb4feee49fdd9f707ef802e22365a35de4b7b299de4763d44bfea899442ff9"
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
+[[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-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "windows-sys"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
+dependencies = [
+ "windows-targets",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.48.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05d4b17490f70499f20b9e791dcf6a299785ce8af4d709018206dc5b4953e95f"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..089a252
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "shdoku"
+description = "a basic tui-sudoku game"
+version = "0.1.0"
+edition = "2021"
+authors = ["markichnich"]
+license = "GPL-3.0-or-later"
+keywords = ["sudoku", "tui", "game", "crossterm"]
+categories = ["games", "mathematics", "science", "algorithms"]
+
+[dependencies]
+crossterm = "0.27.0"
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..d1fdfc1
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,170 @@
+extern crate crossterm;
+use crossterm::{
+    cursor::{MoveTo, SetCursorStyle},
+    event::{poll, read, Event::*, KeyCode::*},
+    execute, queue,
+    terminal::{disable_raw_mode, enable_raw_mode, size, Clear, ClearType::All},
+};
+
+use std::{
+    io::{self, stdout, Stdout, Write},
+    time::Duration,
+};
+
+fn main() -> io::Result<()> {
+    let (width, height) = size()?;
+    let (mut width, mut height) = (width as usize, height as usize);
+
+    let mut screen = vec![String::with_capacity(width); height];
+
+    let modifiable = [
+        [false, false, true, true, false, true, true, true, true],
+        [false, true, true, false, false, false, true, true, true],
+        [true, false, false, true, true, true, true, false, true],
+        [false, true, true, true, false, true, true, true, false],
+        [false, true, true, false, true, false, true, true, false],
+        [false, true, true, true, false, true, true, true, false],
+        [true, false, true, true, true, true, false, false, true],
+        [true, true, true, false, false, false, true, true, false],
+        [true, true, true, true, false, true, true, false, false],
+    ];
+
+    let mut board = [
+        [5, 3, 0, 0, 7, 0, 0, 0, 0],
+        [6, 0, 0, 1, 9, 5, 0, 0, 0],
+        [0, 9, 8, 0, 0, 0, 0, 6, 0],
+        [8, 0, 0, 0, 6, 0, 0, 0, 3],
+        [4, 0, 0, 8, 0, 3, 0, 0, 1],
+        [7, 0, 0, 0, 2, 0, 0, 0, 6],
+        [0, 6, 0, 0, 0, 0, 2, 8, 0],
+        [0, 0, 0, 4, 1, 9, 0, 0, 5],
+        [0, 0, 0, 0, 8, 0, 0, 7, 9],
+    ];
+
+    let mut cur_row = 0;
+    let mut cur_col = 0;
+
+    let mut stdout = stdout();
+    enable_raw_mode()?;
+
+    loop {
+        let (w, h) = size()?;
+        (width, height) = (w as usize, h as usize);
+
+        if poll(Duration::from_millis(250))? {
+            if let Ok(Key(k)) = read() {
+                match k.code {
+                    Char('q') => break,
+                    Char('h') => cur_col = (cur_col + 8) % 9,
+                    Char('j') => cur_row = (cur_row + 1) % 9,
+                    Char('k') => cur_row = (cur_row + 8) % 9,
+                    Char('l') => cur_col = (cur_col + 1) % 9,
+                    Char('H') => cur_col = (cur_col + 6) % 9,
+                    Char('J') => cur_row = (cur_row + 3) % 9,
+                    Char('K') => cur_row = (cur_row + 6) % 9,
+                    Char('L') => cur_col = (cur_col + 3) % 9,
+                    Char('x') => board[cur_row][cur_col] = 0,
+                    Char(num) if ('1'..='9').contains(&num) => {
+                        if modifiable[cur_row][cur_col] {
+                            board[cur_row][cur_col] = num as u8 - b'0'
+                        }
+                    }
+                    _ => {}
+                }
+            }
+        }
+
+        render_to_screen(&mut screen, width, height, board);
+        draw_screen(&mut stdout, &screen)?;
+        place_cursor(&mut stdout, cur_row, cur_col, width, height)?;
+    }
+
+    disable_raw_mode()?;
+
+    Ok(())
+}
+
+fn place_cursor(
+    stdout: &mut Stdout,
+    cur_row: usize,
+    cur_col: usize,
+    width: usize,
+    height: usize,
+) -> io::Result<()> {
+    let (x, y) = ((width / 2 - 14) as u16, (height / 2 - 7) as u16);
+    let (x, y) = (x + 2, y + 1);
+    let (x, y) = (x + 2 * cur_col as u16, y + cur_row as u16);
+    let x = match cur_col {
+        0..=2 => x,
+        3..=5 => x + 3,
+        _ => x + 6,
+    };
+    let y = match cur_row {
+        0..=2 => y,
+        3..=5 => y + 1,
+        _ => y + 2,
+    };
+    execute!(stdout, MoveTo(x, y), SetCursorStyle::SteadyBlock)
+}
+
+fn draw_screen(stdout: &mut Stdout, screen: &[String]) -> io::Result<()> {
+    queue!(stdout, Clear(All))?;
+    let s: String = screen.join("\r\n");
+    write!(stdout, "{}", s)?;
+    stdout.flush()?;
+    Ok(())
+}
+
+fn render_to_screen(screen: &mut Vec<String>, cols: usize, rows: usize, board: [[u8; 9]; 9]) {
+    let mut lines = Vec::new();
+    lines.push("┌────────┬────────┬────────┐".to_string().chars().collect());
+
+    for (row, row_slice) in board.iter().enumerate() {
+        match row {
+            3 | 6 => {
+                lines.push("├────────┼────────┼────────┤".to_string().chars().collect());
+            }
+            _ => {}
+        }
+        let mut line = String::new();
+        for (col, cur_field) in row_slice.iter().enumerate() {
+            match col {
+                0 => {
+                    line.push_str("│ ");
+                }
+                3 | 6 => {
+                    line.push_str(" │ ");
+                }
+                _ => {}
+            }
+            line.push(match cur_field {
+                0 => ' ',
+                n => (b'0' + n) as char,
+            });
+            line.push(' ');
+        }
+        line.push_str(" │");
+        lines.push(line);
+    }
+    lines.push("└────────┴────────┴────────┘".to_string().chars().collect());
+
+    let pad_hori = cols / 2 + lines[0].chars().count() / 2;
+    let pad_vert = rows - lines.len();
+    let pad_top = pad_vert / 2;
+    let pad_bot = pad_vert - pad_top;
+
+    let mut new_screen = Vec::new();
+
+    for _ in 0..pad_top {
+        new_screen.push(String::new());
+    }
+    for line in lines {
+        let padded = format!("{: >width$}", line, width = pad_hori);
+        new_screen.push(padded);
+    }
+    for _ in 0..pad_bot {
+        new_screen.push(String::new());
+    }
+
+    *screen = new_screen;
+}