feat(tui): add support for BiDi/RTL rendering - WIP

Cargo.toml

@@ -78,6 +78,7 @@ tracing = "0.1.40"
 tracing-chrome = "0.7.2"
 tracing-subscriber = { version = "0.3.18", default-features = false }
 tun2 = "4.0.0"
+unicode-bidi = "0.3.17"
 unicode-width = "0.2.0"
 widestring = "1.0.2"
 windows-sys = "0.52.0"

crates/trippy-tui/Cargo.toml

@@ -53,6 +53,7 @@ toml = { workspace = true, default-features = false, features = [ "parse" ] }
 tracing-chrome.workspace = true
 tracing-subscriber = { workspace = true, default-features = false, features = [ "env-filter", "json" ] }
 tracing.workspace = true
+unicode-bidi.workspace = true
 unicode-width.workspace = true
 
 [dev-dependencies]

crates/trippy-tui/src/frontend/columns.rs

@@ -257,6 +257,7 @@ impl Display for ColumnType {
 
 impl ColumnType {
     /// The name of the column in the current locale.
+    #[allow(clippy::cognitive_complexity)]
     pub(self) fn name(&self) -> Cow<'_, str> {
         match self {
             Self::Ttl => Cow::Borrowed("#"),

crates/trippy-tui/src/frontend/render/settings.rs

@@ -121,6 +121,7 @@ fn render_settings_info(f: &mut Frame<'_>, app: &TuiApp, rect: Rect, info: &str)
 }
 
 /// Format all settings.
+#[allow(clippy::cognitive_complexity)]
 fn format_all_settings(app: &TuiApp) -> Vec<(String, String, Vec<SettingsItem>)> {
     let tui_settings = format_tui_settings(app);
     let trace_settings = format_trace_settings(app);

crates/trippy-tui/src/locale.rs

@@ -1,5 +1,10 @@
+use std::borrow::Cow;
+use unicode_bidi::BidiInfo;
+
 const FALLBACK_LOCALE: &str = "en";
 
+const RTL_LOCALES: &[&str] = &["ar"];
+
 /// Set the locale for the application.
 ///
 /// If the given locale is `None` or unsupported, the system locale is tried. If the system locale
@@ -48,14 +53,39 @@ fn split_locale(locale: &str) -> String {
         .to_string()
 }
 
-// A macro for translating a text string.
+/// A macro for translating a text string.
+///
+/// If the current locale is right-to-left, the text is reordered.
 #[macro_export]
 macro_rules! t {
     ($($all:tt)*) => {
-        rust_i18n::t!($($all)*)
+        {
+            let translated = rust_i18n::t!($($all)*);
+            if $crate::locale::__is_rtl_locale() {
+                $crate::locale::__bidi_reorder_line(&translated)
+            } else {
+                translated
+            }
+        }
     }
 }
 
+/// Check if the current locale is right-to-left.
+pub fn __is_rtl_locale() -> bool {
+    let binding = rust_i18n::locale();
+    let locale = &*binding;
+    RTL_LOCALES.contains(&locale)
+}
+
+/// Reorder a line of text according to the current locale.
+pub fn __bidi_reorder_line<'a>(translated: &str) -> Cow<'a, str> {
+    let bidi_info = BidiInfo::new(translated, None);
+    let para = &bidi_info.paragraphs[0];
+    let line = para.range.clone();
+    let display = bidi_info.reorder_line(para, line).to_string();
+    display.into()
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;