fonts: use gossip's font loading code for testing

src/fonts.rs

@@ -1,7 +1,9 @@
-use egui::{FontData, FontDefinitions, FontFamily};
+use egui::{FontData, FontDefinitions, FontFamily, FontTweak};
+use std::collections::BTreeMap;
 
 pub fn setup_fonts(ctx: &egui::Context) {
     let mut fonts = FontDefinitions::default();
+    let mut families = BTreeMap::<String, FontData>::new();
 
     let our_font: String = "onest".to_owned();
 
@@ -26,3 +28,77 @@ pub fn setup_fonts(ctx: &egui::Context) {
 
     ctx.set_fonts(fonts);
 }
+
+// Use gossip's approach to font loading. This includes japanese fonts
+// for rending stuff from japanese users.
+pub fn setup_gossip_fonts(ctx: &egui::Context) {
+    let mut font_data: BTreeMap<String, FontData> = BTreeMap::new();
+    let mut families = BTreeMap::new();
+
+    font_data.insert(
+        "DejaVuSans".to_owned(),
+        FontData::from_static(include_bytes!("../assets/fonts/DejaVuSansSansEmoji.ttf")),
+    );
+    font_data.insert(
+        "DejaVuSansBold".to_owned(),
+        FontData::from_static(include_bytes!(
+            "../assets/fonts/DejaVuSans-Bold-SansEmoji.ttf"
+        )),
+    );
+
+    if cfg!(feature = "lang-cjk") {
+        font_data.insert(
+            "NotoSansCJK".to_owned(),
+            FontData::from_static(include_bytes!("../assets/fonts/NotoSansCJK-Regular.ttc")),
+        );
+    }
+
+    font_data.insert(
+        "Inconsolata".to_owned(),
+        FontData::from_static(include_bytes!("../assets/fonts/Inconsolata-Regular.ttf")).tweak(
+            FontTweak {
+                scale: 1.22,            // This font is smaller than DejaVuSans
+                y_offset_factor: -0.18, // and too low
+                y_offset: 0.0,
+                baseline_offset_factor: 0.0,
+            },
+        ),
+    );
+
+    // Some good looking emojis. Use as first priority:
+    font_data.insert(
+        "NotoEmoji-Regular".to_owned(),
+        FontData::from_static(include_bytes!("../assets/fonts/NotoEmoji-Regular.ttf")).tweak(
+            FontTweak {
+                scale: 1.1, // make them a touch larger
+                y_offset_factor: 0.0,
+                y_offset: 0.0,
+                baseline_offset_factor: 0.0,
+            },
+        ),
+    );
+
+    let mut proportional = vec!["DejaVuSans".to_owned(), "NotoEmoji-Regular".to_owned()];
+    if cfg!(feature = "lang-cjk") {
+        proportional.push("NotoSansCJK".to_owned());
+    }
+
+    families.insert(FontFamily::Proportional, proportional);
+
+    families.insert(
+        FontFamily::Monospace,
+        vec!["Inconsolata".to_owned(), "NotoEmoji-Regular".to_owned()],
+    );
+
+    families.insert(
+        FontFamily::Name("Bold".into()),
+        vec!["DejaVuSansBold".to_owned()],
+    );
+
+    let defs = FontDefinitions {
+        font_data,
+        families,
+    };
+
+    ctx.set_fonts(defs);
+}