Work on listing available styles for a family

tools/cmd/list_fonts/styles.go

@@ -0,0 +1,35 @@
+package list_fonts
+
+import (
+	"fmt"
+	"kitty/tools/utils"
+)
+
+var _ = fmt.Print
+
+func styles_in_family(family string, fonts []ListedFont) (ans []string, is_variable bool) {
+	has_style_attribute_data := false
+	for _, f := range fonts {
+		vd := variable_data_for(f)
+		if len(vd.Design_axes) > 0 {
+			has_style_attribute_data = true
+			break
+		}
+	}
+	ans = make([]string, 0)
+	seen := utils.NewSet[string]()
+	add := func(x string) {
+		if !seen.Has(x) {
+			seen.Add(x)
+			ans = append(ans, x)
+		}
+	}
+	if has_style_attribute_data {
+	} else {
+		for _, f := range fonts {
+			add(f.Style)
+		}
+	}
+	debugprintln(111111111, family, has_style_attribute_data, ans)
+	return
+}

tools/cmd/list_fonts/types.go

@@ -45,6 +45,7 @@ type MultiAxisStyle struct {
 
 type ListedFont struct {
 	Family          string         `json:"family"`
+	Style           string         `json:"style"`
 	Fullname        string         `json:"full_name"`
 	Postscript_name string         `json:"postscript_name"`
 	Is_monospace    bool           `json:"is_monospace"`

tools/cmd/list_fonts/ui.go

@@ -83,6 +83,7 @@ func (h *handler) draw_family_summary(start_x int, sz loop.ScreenSize) (err erro
 		return fmt.Errorf("The family: %s has no fonts", family)
 	}
 	if has_variable_data_for_font(fonts[0]) {
+		styles_in_family(family, fonts)
 	} else {
 		lines = append(lines, "Reading font data, please wait…")
 		key := fonts[0].cache_key()
@@ -261,11 +262,9 @@ func (h *handler) on_wakeup() (err error) {
 	case SCANNING_FAMILIES:
 		h.state = LISTING_FAMILIES
 		h.family_list.UpdateFamilies(utils.StableSortWithKey(maps.Keys(h.fonts), strings.ToLower))
-		return h.draw_screen()
 	case LISTING_FAMILIES:
-		return h.draw_screen()
 	}
-	return
+	return h.draw_screen()
 }
 
 func (h *handler) on_key_event(event *loop.KeyEvent) (err error) {