1 files changed, 98 insertions, 0 deletions
diff --git a/vendor/ucd-parse/src/grapheme_cluster_break.rs b/vendor/ucd-parse/src/grapheme_cluster_break.rs
new file mode 100644
index 000000000..9dbf32f41
--- /dev/null
+++ b/vendor/ucd-parse/src/grapheme_cluster_break.rs
@@ -0,0 +1,98 @@
+use std::path::Path;
+use std::str::FromStr;
+
+use crate::common::{
+    parse_break_test, parse_codepoint_association, CodepointIter, Codepoints,
+    UcdFile, UcdFileByCodepoint,
+};
+use crate::error::Error;
+
+/// A single row in the `auxiliary/GraphemeBreakProperty.txt` file.
+#[derive(Clone, Debug, Default, Eq, PartialEq)]
+pub struct GraphemeClusterBreak {
+    /// The codepoint or codepoint range for this entry.
+    pub codepoints: Codepoints,
+    /// The property value assigned to the codepoints in this entry.
+    pub value: String,
+}
+
+impl UcdFile for GraphemeClusterBreak {
+    fn relative_file_path() -> &'static Path {
+        Path::new("auxiliary/GraphemeBreakProperty.txt")
+    }
+}
+
+impl UcdFileByCodepoint for GraphemeClusterBreak {
+    fn codepoints(&self) -> CodepointIter {
+        self.codepoints.into_iter()
+    }
+}
+
+impl FromStr for GraphemeClusterBreak {
+    type Err = Error;
+
+    fn from_str(line: &str) -> Result<GraphemeClusterBreak, Error> {
+        let (codepoints, value) = parse_codepoint_association(line)?;
+        Ok(GraphemeClusterBreak { codepoints, value: value.to_string() })
+    }
+}
+
+/// A single row in the `auxiliary/GraphemeBreakTest.txt` file.
+///
+/// This file defines tests for the grapheme cluster break algorithm.
+#[derive(Clone, Debug, Default, Eq, PartialEq)]
+pub struct GraphemeClusterBreakTest {
+    /// Each string is a UTF-8 encoded group of codepoints that make up a
+    /// single grapheme cluster.
+    pub grapheme_clusters: Vec<String>,
+    /// A human readable description of this test.
+    pub comment: String,
+}
+
+impl UcdFile for GraphemeClusterBreakTest {
+    fn relative_file_path() -> &'static Path {
+        Path::new("auxiliary/GraphemeBreakTest.txt")
+    }
+}
+
+impl FromStr for GraphemeClusterBreakTest {
+    type Err = Error;
+
+    fn from_str(line: &str) -> Result<GraphemeClusterBreakTest, Error> {
+        let (groups, comment) = parse_break_test(line)?;
+        Ok(GraphemeClusterBreakTest { grapheme_clusters: groups, comment })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{GraphemeClusterBreak, GraphemeClusterBreakTest};
+
+    #[test]
+    fn parse_single() {
+        let line = "093B          ; SpacingMark # Mc       DEVANAGARI VOWEL SIGN OOE\n";
+        let row: GraphemeClusterBreak = line.parse().unwrap();
+        assert_eq!(row.codepoints, 0x093B);
+        assert_eq!(row.value, "SpacingMark");
+    }
+
+    #[test]
+    fn parse_range() {
+        let line = "1F1E6..1F1FF  ; Regional_Indicator # So  [26] REGIONAL INDICATOR SYMBOL LETTER A..REGIONAL INDICATOR SYMBOL LETTER Z\n";
+        let row: GraphemeClusterBreak = line.parse().unwrap();
+        assert_eq!(row.codepoints, (0x1F1E6, 0x1F1FF));
+        assert_eq!(row.value, "Regional_Indicator");
+    }
+
+    #[test]
+    fn parse_test() {
+        let line = "÷ 0061 × 1F3FF ÷ 1F476 × 200D × 1F6D1 ÷	#  ÷ [0.2] LATIN SMALL LETTER A (Other) × [9.0] EMOJI MODIFIER FITZPATRICK TYPE-6 (Extend) ÷ [999.0] BABY (ExtPict) × [9.0] ZERO WIDTH JOINER (ZWJ_ExtCccZwj) × [11.0] OCTAGONAL SIGN (ExtPict) ÷ [0.3]\n";
+
+        let row: GraphemeClusterBreakTest = line.parse().unwrap();
+        assert_eq!(
+            row.grapheme_clusters,
+            vec!["\u{0061}\u{1F3FF}", "\u{1F476}\u{200D}\u{1F6D1}",]
+        );
+        assert!(row.comment.starts_with("÷ [0.2] LATIN SMALL LETTER A"));
+    }
+}