T66: files dropped on the terminal type their paths, which a user asked for after 0.1.6, as macOS Terminal does: each escaped for the shell, or quoted on Windows when it holds a space, followed by a space, sent as a paste; a path not in UTF-8 or holding a control character stops the drop; the font code moves from view.rs to fonts.rs, which view.rs needed room for; shot plays a drop with drop@x,y

src/term/fonts.rs

@@ -0,0 +1,78 @@
+//! The terminal's font, cell and metrics.
+
+use gpui::{
+    Font, FontFeatures, FontId, FontStyle, FontWeight, Pixels, TextSystem, Window, px, size,
+};
+
+use super::{ink::Ink, paint::Look};
+use crate::settings::Settings;
+
+/// The bundled Nerd Font that draws icons any font lacks; gpui loads no font without an `m`.
+pub const ICONS: &str = "JetBrainsMono Nerd Font Mono";
+
+/// The bundled code font, the default.
+pub const MONO: &str = "JetBrains Mono";
+
+/// `font` as gpui loads it; gpui falls back to another font without a word, and loads none without an `m`.
+pub fn load_font(font: &Font, system: &TextSystem) -> anyhow::Result<FontId> {
+    let id = system.resolve_font(font);
+    let loaded = system.get_font_for_id(id);
+    anyhow::ensure!(
+        loaded.is_some_and(|loaded| loaded.family == font.family),
+        "font_family is {:?}, which the terminal cannot load",
+        font.family
+    );
+    Ok(id)
+}
+
+/// Font, cell and metrics at `points` on this window.
+pub(super) fn look(
+    settings: &Settings,
+    points: f32,
+    ink: &Ink,
+    window: &Window,
+) -> anyhow::Result<Look> {
+    let font = Font {
+        family: settings.font_family.clone().into(),
+        features: if settings.ligatures {
+            FontFeatures::default()
+        } else {
+            FontFeatures::disable_ligatures()
+        },
+        fallbacks: None,
+        weight: FontWeight::NORMAL,
+        style: FontStyle::Normal,
+    };
+    let text = px(points);
+    let system = window.text_system();
+    let id = load_font(&font, system)?;
+    let advance = system
+        .advance(id, text, 'M')
+        .map_err(|error| anyhow::anyhow!("{} cannot measure M: {error}", settings.font_family))?;
+    let scale = window.scale_factor();
+    let snap = |length: Pixels| px((f32::from(length) * scale).round() / scale);
+    let cell = size(
+        snap(advance.width).max(px(1.)),
+        snap(text * settings.line_height),
+    );
+    let (ascent, descent) = (system.ascent(id, text), system.descent(id, text).abs());
+    let icons = Font {
+        family: ICONS.into(),
+        features: FontFeatures::default(),
+        ..font.clone()
+    };
+    Ok(Look {
+        font_id: id,
+        icons,
+        baseline: (cell.height - ascent - descent) / 2. + ascent,
+        descent,
+        rule: snap((text / 14.).max(px(1.))),
+        size: text,
+        cell,
+        font,
+        cursor: ink.cursor,
+        cursor_text: ink.cursor_text,
+        fg: ink.fg,
+        bg: ink.bg,
+    })
+}