Move font::Source to iced_graphics

graphics/Cargo.toml

@@ -6,6 +6,7 @@ edition = "2018"
 
 [features]
 canvas = ["lyon"]
+font-source = ["font-kit"]
 
 [dependencies]
 bytemuck = "1.2"
@@ -22,3 +23,7 @@ path = "../style"
 [dependencies.lyon]
 version = "0.15"
 optional = true
+
+[dependencies.font-kit]
+version = "0.6"
+optional = true

graphics/src/font.rs

@@ -0,0 +1,10 @@
+#[cfg(feature = "font-source")]
+mod source;
+
+#[cfg(feature = "font-source")]
+pub use source::Source;
+
+#[cfg(feature = "font-source")]
+pub use font_kit::{
+    error::SelectionError as LoadError, family_name::FamilyName as Family,
+};

graphics/src/font/source.rs

@@ -0,0 +1,35 @@
+use crate::font::{Family, LoadError};
+
+pub struct Source {
+    raw: font_kit::source::SystemSource,
+}
+
+impl Source {
+    pub fn new() -> Self {
+        Source {
+            raw: font_kit::source::SystemSource::new(),
+        }
+    }
+
+    pub fn load(&self, families: &[Family]) -> Result<Vec<u8>, LoadError> {
+        let font = self.raw.select_best_match(
+            families,
+            &font_kit::properties::Properties::default(),
+        )?;
+
+        match font {
+            font_kit::handle::Handle::Path { path, .. } => {
+                use std::io::Read;
+
+                let mut buf = Vec::new();
+                let mut reader = std::fs::File::open(path).expect("Read font");
+                let _ = reader.read_to_end(&mut buf);
+
+                Ok(buf)
+            }
+            font_kit::handle::Handle::Memory { bytes, .. } => {
+                Ok(bytes.as_ref().clone())
+            }
+        }
+    }
+}

graphics/src/lib.rs

@@ -6,6 +6,7 @@ mod viewport;
 mod widget;
 
 pub mod backend;
+pub mod font;
 pub mod triangle;
 
 #[doc(no_inline)]