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Brandon ThomasandClaude Opus 5.5
27ef18ec2c
U+25FB is a real glyph in DejaVu, so the test could pass while symbols still rendered as boxes. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
31 lines
1.7 KiB
Rust
31 lines
1.7 KiB
Rust
//! The interface's symbol characters must not render as empty boxes (#197, #54): the UI font often
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//! lacks arrows, check marks and geometric shapes, so a symbol face backs it up.
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use egui::{Color32, FontFamily, FontId};
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use gridcraft_ui_egui::theme;
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/// Symbols the interface draws as text (buttons, menus, dialogs, tooltips, Insert › Symbol).
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const UI_SYMBOLS: &str = "▲▼▸▾✓✕←↑→↓↳↘↗⇧⌃⌘★•›≠≤≥∞";
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#[test]
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fn ui_symbols_have_glyphs_when_a_symbol_face_is_installed() {
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if !theme::symbol_face_installed() {
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return; // a minimal machine without any symbol face; nothing to assert
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}
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let ctx = egui::Context::default();
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ctx.set_fonts(theme::font_definitions());
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let mut out = ctx.run_ui(egui::RawInput::default(), |_ui| {});
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out.textures_delta.clear(); // nothing consumes the atlas in a headless test
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for family in [FontFamily::Proportional, FontFamily::Name(theme::CELL.into())] {
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let font = FontId::new(14.0, family);
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let glyphs = |text: &str| {
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let galley = ctx.fonts_mut(|f| f.layout_no_wrap(text.to_owned(), font.clone(), Color32::BLACK));
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galley.rows.iter().flat_map(|r| r.glyphs.iter().map(|g| (g.chr, g.uv_rect))).collect::<Vec<_>>()
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};
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// A private-use code point no font covers renders as the replacement box.
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let tofu: Vec<_> = glyphs("\u{10FFFD}").into_iter().map(|(_, uv)| uv).collect();
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let missing: String = glyphs(UI_SYMBOLS).into_iter().filter(|(_, uv)| tofu.contains(uv)).map(|(c, _)| c).collect();
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assert!(missing.is_empty(), "these interface symbols render as boxes in {:?}: {missing}", font.family);
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}
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}
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