Add text attributes

src/attrs.rs

@@ -0,0 +1,46 @@
+pub use fontdb::{Family, Stretch, Style, Weight};
+
+pub struct Attrs<'a> {
+    pub family: Family<'a>,
+    pub monospaced: bool,
+    pub stretch: Stretch,
+    pub style: Style,
+    pub weight: Weight,
+}
+
+impl<'a> Attrs<'a> {
+    pub fn new() -> Self {
+        Self {
+            family: Family::SansSerif,
+            monospaced: false,
+            stretch: Stretch::Normal,
+            style: Style::Normal,
+            weight: Weight::NORMAL,
+        }
+    }
+
+    pub fn family(mut self, family: Family<'a>) -> Self {
+        self.family = family;
+        self
+    }
+
+    pub fn monospaced(mut self, monospaced: bool) -> Self {
+        self.monospaced = monospaced;
+        self
+    }
+
+    pub fn stretch(mut self, stretch: Stretch) -> Self {
+        self.stretch = stretch;
+        self
+    }
+
+    pub fn style(mut self, style: Style) -> Self {
+        self.style = style;
+        self
+    }
+
+    pub fn weight(mut self, weight: Weight) -> Self {
+        self.weight = weight;
+        self
+    }
+}

src/font/system.rs

@@ -2,7 +2,7 @@
 
 use std::ops::Deref;
 
-use super::{Font, FontMatches};
+use crate::{Attrs, Font, FontMatches};
 
 /// Access system fonts
 pub struct FontSystem {
@@ -81,6 +81,33 @@ impl FontSystem {
             None
         }
     }
+
+    pub fn matches_attrs(&self, attrs: Attrs) -> Option<FontMatches<'_>> {
+        self.matches(|info| {
+            let matched = {
+                info.style == attrs.style &&
+                info.weight == attrs.weight &&
+                info.stretch == attrs.stretch &&
+                //TODO: smarter way of including emoji
+                (info.monospaced == attrs.monospaced || info.post_script_name.contains("Emoji"))
+            };
+
+            if matched {
+                log::debug!(
+                    "{:?}: family '{}' postscript name '{}' style {:?} weight {:?} stretch {:?} monospaced {:?}",
+                    info.id,
+                    info.family,
+                    info.post_script_name,
+                    info.style,
+                    info.weight,
+                    info.stretch,
+                    info.monospaced
+                );
+            }
+
+            matched
+        })
+    }
 }
 
 impl Default for FontSystem {

src/lib.rs

@@ -1,5 +1,8 @@
 // SPDX-License-Identifier: MIT OR Apache-2.0
 
+pub use self::attrs::*;
+mod attrs;
+
 pub use self::buffer::*;
 mod buffer;