Initial commit

1 files changed, 73 insertions, 0 deletions

diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..b77aa40
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,73 @@
+const LINE_BREAK_TABLE_URL: &str = "http://www.unicode.org/Public/UCD/latest/ucd/LineBreak.txt";
+use std::fs::File;
+use std::io::prelude::*;
+use std::io::BufReader;
+use std::path::PathBuf;
+use std::process::Command;
+
+include!("src/ui/text_processing/types.rs");
+
+fn main() -> Result<(), std::io::Error> {
+    let mod_path = PathBuf::from("src/ui/text_processing/tables.rs");
+    if mod_path.exists() {
+        eprintln!(
+            "{} already exists, delete it if you want to replace it.",
+            mod_path.display()
+        );
+        std::process::exit(0);
+    }
+    let mut tmpdir_path = PathBuf::from(
+        std::str::from_utf8(&Command::new("mktemp").arg("-d").output()?.stdout)
+            .unwrap()
+            .trim(),
+    );
+    tmpdir_path.push("LineBreak.txt");
+    Command::new("curl")
+        .args(&["-o", tmpdir_path.to_str().unwrap(), LINE_BREAK_TABLE_URL])
+        .output()?;
+
+    let file = File::open(&tmpdir_path)?;
+    let buf_reader = BufReader::new(file);
+
+    let mut line_break_table: Vec<(u32, u32, LineBreakClass)> = Vec::with_capacity(3800);
+    for line in buf_reader.lines() {
+        let line = line.unwrap();
+        if line.starts_with('#') || line.starts_with(' ') || line.is_empty() {
+            continue;
+        }
+        let tokens: &str = line.split_whitespace().next().unwrap();
+
+        let semicolon_idx: usize = tokens.chars().position(|c| c == ';').unwrap();
+        /* LineBreak.txt list is ascii encoded so we can assume each char takes one byte: */
+        let chars_str: &str = &tokens[..semicolon_idx];
+
+        let mut codepoint_iter = chars_str.split("..");
+
+        let first_codepoint: u32 =
+            u32::from_str_radix(std::dbg!(codepoint_iter.next().unwrap()), 16).unwrap();
+
+        let sec_codepoint: u32 = codepoint_iter
+            .next()
+            .map(|v| u32::from_str_radix(std::dbg!(v), 16).unwrap())
+            .unwrap_or(first_codepoint);
+        let class = &tokens[semicolon_idx + 1..semicolon_idx + 1 + 2];
+        line_break_table.push((first_codepoint, sec_codepoint, LineBreakClass::from(class)));
+    }
+
+    let mut file = File::create(&mod_path)?;
+    file.write_all(b"use crate::types::LineBreakClass::*;\n")
+        .unwrap();
+    file.write_all(b"use crate::types::LineBreakClass;\n\n")
+        .unwrap();
+    file.write_all(b"const line_break_rules: &'static [(u32, u32, LineBreakClass)] = &[\n")
+        .unwrap();
+    for l in &line_break_table {
+        file.write_all(format!("    (0x{:X}, 0x{:X}, {:?}),\n", l.0, l.1, l.2).as_bytes())
+            .unwrap();
+    }
+    file.write_all(b"];").unwrap();
+    std::fs::remove_file(&tmpdir_path).unwrap();
+    tmpdir_path.pop();
+    std::fs::remove_dir(&tmpdir_path).unwrap();
+    Ok(())
+}