1 files changed, 130 insertions, 0 deletions
diff --git a/vendor/unic-langid-impl/src/bin/generate_layout.rs b/vendor/unic-langid-impl/src/bin/generate_layout.rs
new file mode 100644
index 000000000..35d8e27ae
--- /dev/null
+++ b/vendor/unic-langid-impl/src/bin/generate_layout.rs
@@ -0,0 +1,130 @@
+use serde_json::Value;
+use std::collections::HashMap;
+use std::collections::HashSet;
+use std::fs;
+use unic_langid_impl::subtags::{Language, Script};
+use unic_langid_impl::CharacterDirection;
+use unic_langid_impl::LanguageIdentifier;
+
+fn langid_to_direction_map(path: &str) -> HashMap<LanguageIdentifier, CharacterDirection> {
+    let mut result = HashMap::new();
+    for entry in fs::read_dir(path).unwrap() {
+        let entry = entry.unwrap();
+        let mut path = entry.path();
+        path.push("layout.json");
+        let contents = fs::read_to_string(path).expect("Something went wrong reading the file");
+        let v: Value = serde_json::from_str(&contents).unwrap();
+
+        let langid_key = v["main"].as_object().unwrap().keys().nth(0).unwrap();
+
+        if langid_key == "root" {
+            continue;
+        }
+        let langid: LanguageIdentifier = langid_key.parse().unwrap();
+
+        let character_order = match v["main"][langid_key]["layout"]["orientation"]["characterOrder"]
+            .as_str()
+            .unwrap()
+        {
+            "right-to-left" => CharacterDirection::RTL,
+            "left-to-right" => CharacterDirection::LTR,
+            _ => unimplemented!("Encountered unknown directionality!"),
+        };
+        result.insert(langid, character_order);
+    }
+    result
+}
+
+fn check_all_variants_rtl(
+    map: &HashMap<LanguageIdentifier, CharacterDirection>,
+    lang: Option<Language>,
+    script: Option<Script>,
+) -> bool {
+    for (langid, dir) in map.iter() {
+        if let Some(reference_script) = script {
+            if let Some(s) = langid.script {
+                if reference_script == s && dir != &CharacterDirection::RTL {
+                    return false;
+                }
+            }
+        }
+        if let Some(reference_lang) = lang {
+            if langid.language == reference_lang && dir != &CharacterDirection::RTL {
+                println!("{:#?}", langid);
+                println!("{:#?}", lang);
+                return false;
+            }
+        }
+    }
+    true
+}
+
+fn main() {
+    let path = "./data/cldr-misc-full/main/";
+    let map = langid_to_direction_map(path);
+
+    let mut scripts = HashSet::new();
+    let mut langs = HashSet::new();
+
+    for (langid, dir) in map.iter() {
+        if dir == &CharacterDirection::LTR {
+            continue;
+        }
+
+        let script = langid.script;
+
+        if let Some(script) = script {
+            if scripts.contains(&script) {
+                continue;
+            }
+            assert!(
+                check_all_variants_rtl(&map, None, Some(script)),
+                "We didn't expect a script with two directionalities!"
+            );
+            scripts.insert(script);
+            continue;
+        }
+
+        let lang = langid.language;
+
+        if langs.contains(&lang) {
+            continue;
+        }
+
+        assert!(
+            check_all_variants_rtl(&map, Some(lang), None),
+            "We didn't expect a language with two directionalities!"
+        );
+        langs.insert(lang);
+    }
+
+    let mut scripts: Vec<String> = scripts
+        .into_iter()
+        .map(|s| {
+            let v: u32 = s.into();
+            v.to_string()
+        })
+        .collect();
+    scripts.sort();
+    let mut langs: Vec<String> = langs
+        .into_iter()
+        .map(|s| {
+            let v: Option<u64> = s.into();
+            let v: u64 = v.expect("Expected language to not be undefined.");
+            v.to_string()
+        })
+        .collect();
+    langs.sort();
+
+    println!(
+        "pub const SCRIPTS_CHARACTER_DIRECTION_RTL: [u32; {}] = [{}];",
+        scripts.len(),
+        scripts.join(", ")
+    );
+
+    println!(
+        "pub const LANGS_CHARACTER_DIRECTION_RTL: [u64; {}] = [{}];",
+        langs.len(),
+        langs.join(", ")
+    );
+}