fix: use indexmap to keep order of fvar data

Cargo.toml

@@ -46,6 +46,7 @@ unicode-script = { version = "0.5.4", optional = true }
 woff2-patched = { version = "0.3.0", optional = true }
 png = { version = "0.17.13", optional = true }
 inflections = "1.1.1"
+indexmap = "2.6.0"
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 wit-bindgen-rt = { version = "0.24.0", optional = true }

src/font.rs

@@ -1,10 +1,10 @@
 use arc_swap::ArcSwap;
 #[cfg(feature = "parse")]
 use byteorder::{BigEndian, ReadBytesExt};
+#[cfg(feature = "parse")]
+use indexmap::IndexMap;
 use ordered_float::OrderedFloat;
 use ouroboros::self_referencing;
-#[cfg(feature = "parse")]
-use std::collections::HashMap;
 use std::fmt;
 use std::hash::Hash;
 #[cfg(feature = "parse")]
@@ -154,6 +154,7 @@ pub fn is_otf(buf: &[u8]) -> bool {
         && buf[4] == 0x00
 }
 
+#[derive(Debug)]
 pub(crate) struct VariationData {
     pub key: FontKey,
     pub names: Vec<Name>,
@@ -177,7 +178,7 @@ impl VariationData {
             .collect::<Vec<_>>();
 
         // get fvar if any
-        let mut instances: HashMap<Vec<OrderedFloat<f32>>, Vec<FvarInstance>> = HashMap::new();
+        let mut instances: IndexMap<Vec<OrderedFloat<f32>>, Vec<FvarInstance>> = IndexMap::new();
         if let (Some(_), Some(name_table)) = (face.tables().fvar, face.tables().name) {
             // currently ttf-parser is missing `fvar`'s instance records, we parse them
             // directly from `RawFace`

tests/basic.rs

@@ -101,6 +101,6 @@ pub fn test_complex_text_wrap() -> Result<(), Error> {
     });
     area.unwrap_text();
     area.wrap_text(64.4)?;
-    assert_eq!(area.value_string(), "商家\n热卖\n1234\n567\n8");
+    assert_eq!(area.value_string(), "商家\n热卖\n123\n456\n78");
     Ok(())
 }