wip chat sessions

date_separator.go

@@ -0,0 +1,72 @@
+package mujica
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/egoist/mygo/ui"
+
+	"mujicaui/internal"
+	"mujicaui/theme"
+)
+
+// DateSeparatorOptions configure a DateSeparator.
+type DateSeparatorOptions struct {
+	// Today decides "Today" and "Yesterday"; zero uses the window clock.
+	Today Date
+}
+
+// DateSeparator marks where a day's messages begin: Today, Yesterday, or the full date in the window's language.
+func DateSeparator(c *ui.Context, day Date, opts DateSeparatorOptions) *ui.Element {
+	if !day.Valid() {
+		panic("mujica: DateSeparator needs a valid date")
+	}
+	today := opts.Today
+	if today.IsZero() {
+		today = DateOf(c.Now())
+	}
+	k := Tokens(c)
+	u := 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(9).Draw(func(p *ui.Painter, r ui.Rect) {
+			internal.Rule(p, r.X, r.X+r.W, r.Y+r.H/2, 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(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 Date) string {
+	switch day {
+	case today:
+		return msg(c, "date_separator.today")
+	case today.AddDays(-1):
+		return msg(c, "date_separator.yesterday")
+	}
+	return fmt.Sprintf(msg(c, "calendar.day_label"), msg(c, fmt.Sprintf("calendar.weekday_long_%d", day.Weekday())),
+		msg(c, fmt.Sprintf("calendar.month_%d", day.Month)), day.Day, day.Year)
+}
+
+// dateSeparatorWhen is a short time stamp: the clock today, else the relative day or date.
+func dateSeparatorWhen(c *ui.Context, t time.Time, today Date) string {
+	day := DateOf(t)
+	if day == today {
+		return t.Format("15:04")
+	}
+	if day == today.AddDays(-1) {
+		return msg(c, "date_separator.yesterday")
+	}
+	return fmt.Sprintf(msg(c, "date_separator.short"), msg(c, fmt.Sprintf("calendar.month_%d", day.Month)), day.Day)
+}