Sketch text: live Edit Text from the Text tool, a font list, handles, and whole-text picking (#821)

Live Edit Text from the Text tool, a font list, handles, and picking the whole text.

crates/sketch/src/font_tests.rs

@@ -307,3 +307,20 @@ fn a_font_is_kept_in_the_design_and_old_designs_read_without_one() {
     assert!(json.contains(r#""font":"C:/fonts/Some Font.ttf""#), "{json}");
     assert_eq!(serde_json::from_str::<LinkSource>(&json).unwrap(), source(Some("C:/fonts/Some Font.ttf")));
 }
+
+#[test]
+fn installed_families_are_listed_by_name_once_without_the_built_in_one() {
+    let folder = Folder::new("families");
+    // A second copy of the tiny font, the built-in font and the repository's second font: each family once,
+    // sorted; the built-in family is not among the installed ones, broken files and other files are skipped.
+    std::fs::write(folder.0.join("copy.ttf"), tiny_font()).unwrap();
+    std::fs::copy(PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("fonts").join("LiberationSans-Regular.ttf"), folder.0.join("lib.ttf")).unwrap();
+    std::fs::copy(web_fonts().join("BIZUDPGothic-Regular.ttf"), folder.0.join("biz.ttf")).unwrap();
+    let families = crate::families_in(std::slice::from_ref(&folder.0));
+    assert_eq!(families, ["BIZ UDPGothic", "Tiny Block"]);
+    // Each name finds its font again.
+    for family in &families {
+        assert!(find_family_in(std::slice::from_ref(&folder.0), family).unwrap().is_some(), "{family}");
+    }
+    assert!(crate::families_in(&[folder.0.join("missing")]).is_empty());
+}