Split into category packages; module github.com/ZacharyZhang-NY/MujicaUI

chat/date_separator.go

@@ -0,0 +1,71 @@
+package chat
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/egoist/mygo/ui"
+
+	"github.com/ZacharyZhang-NY/MujicaUI/core"
+	"github.com/ZacharyZhang-NY/MujicaUI/internal"
+	"github.com/ZacharyZhang-NY/MujicaUI/theme"
+)
+
+// DateSeparatorOptions configure a DateSeparator.
+type DateSeparatorOptions struct {
+	// Today decides "Today" and "Yesterday"; zero uses the window clock.
+	Today core.Date
+}
+
+// DateSeparator marks where a day's messages begin, localized.
+func DateSeparator(c *ui.Context, day core.Date, opts DateSeparatorOptions) *ui.Element {
+	if !day.Valid() {
+		panic("mujica: DateSeparator needs a valid date")
+	}
+	today := opts.Today
+	if today.IsZero() {
+		today = core.DateOf(c.Now())
+	}
+	k := core.Tokens(c)
+	u := core.Density(c).Unit()
+	label := dateSeparatorLabel(c, day, today)
+	row := ui.Row(c).FillWidth().Gap(u*3).AlignItems(ui.Center).Padding(u*2, 0).Role(ui.RoleText).Label(label)
+	line := func() {
+		ui.Box(c).Grow(1).Height(theme.BorderWidth).Background(k.Border)
+	}
+	row.Children(func() {
+		line()
+		ui.Row(c).Gap(u * 2).AlignItems(ui.Center).Shrink(0).Children(func() {
+			ui.Box(c).Size(6, 6).Draw(func(p *ui.Painter, r ui.Rect) {
+				p.FillPath(internal.Diamond(r.X+3, r.Y+3, 6), k.Ornament)
+			})
+			ui.Text(c, label).FontSize(core.FontSize(c, theme.CaptionSize)).TextColor(k.TextMuted).SingleLine()
+		})
+		line()
+	})
+	return row
+}
+
+// dateSeparatorLabel names day relative to today, in the window's language.
+func dateSeparatorLabel(c *ui.Context, day, today core.Date) string {
+	switch day {
+	case today:
+		return core.Msg(c, "date_separator.today")
+	case today.AddDays(-1):
+		return core.Msg(c, "date_separator.yesterday")
+	}
+	return fmt.Sprintf(core.Msg(c, "calendar.day_label"), core.Msg(c, fmt.Sprintf("calendar.weekday_long_%d", day.Weekday())),
+		core.Msg(c, fmt.Sprintf("calendar.month_%d", day.Month)), day.Day, day.Year)
+}
+
+// DateSeparatorWhen is a short stamp: time, day or date.
+func DateSeparatorWhen(c *ui.Context, t time.Time, today core.Date) string {
+	day := core.DateOf(t)
+	if day == today {
+		return t.Format("15:04")
+	}
+	if day == today.AddDays(-1) {
+		return core.Msg(c, "date_separator.yesterday")
+	}
+	return fmt.Sprintf(core.Msg(c, "date_separator.short"), core.Msg(c, fmt.Sprintf("calendar.month_%d", day.Month)), day.Day)
+}