115 lines
3.8 KiB
Go
115 lines
3.8 KiB
Go
package datetime
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import (
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"fmt"
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"log/slog"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/core"
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"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/theme"
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)
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// TimeRange is a span of day; End before Start means next day.
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type TimeRange struct {
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Start, End TimeOfDay
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}
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// Overnight reports whether r crosses midnight.
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func (r TimeRange) Overnight() bool { return r.End.Compare(r.Start) < 0 }
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// TimeRangePickerOptions configure a TimeRangePicker.
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type TimeRangePickerOptions struct {
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Seconds bool
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Hour12 bool
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// MinuteStep and SecondStep must divide 60; zero means 1.
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MinuteStep, SecondStep int
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// Min and Max bound both ends; a zero Max means 23:59:59.
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Min, Max TimeOfDay
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// AllowOvernight accepts an end before the start, meaning the next day.
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AllowOvernight bool
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Disabled bool
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// ReadOnly keeps both ends focusable and copyable but blocks edits.
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ReadOnly bool
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// Label names the pair for assistive technology.
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Label string
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}
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// TimeRangePicker writes *value only when the range is valid.
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func TimeRangePicker(c *ui.Context, value *TimeRange, opts TimeRangePickerOptions) DateTimeResult {
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cfg := timePickerConfig("TimeRangePicker", TimePickerOptions{Seconds: opts.Seconds, Hour12: opts.Hour12,
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MinuteStep: opts.MinuteStep, SecondStep: opts.SecondStep, Min: opts.Min, Max: opts.Max, ReadOnly: opts.ReadOnly})
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if !value.Start.Valid() || !value.End.Valid() {
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panic(fmt.Sprintf("mujica: TimeRangePicker value %v is not a pair of times", *value))
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}
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if value.Overnight() && !opts.AllowOvernight {
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panic(fmt.Sprintf("mujica: TimeRangePicker value %v crosses midnight without AllowOvernight", *value))
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}
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k := core.Tokens(c)
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d := core.Density(c)
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col := ui.Column(c).Gap(d.Unit()).AlignItems(ui.Start).Disabled(opts.Disabled).Role(ui.RoleGroup)
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if opts.Label != "" {
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col.Label(opts.Label)
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}
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draft := ui.Local(col, "time-range-draft", func() TimeRange { return *value })
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seen := ui.Local(col, "time-range-seen", func() TimeRange { return *value })
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problem := ui.Local(col, "time-range-error", func() string { return "" })
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pending := ui.Local(col, "time-range-pending", func() bool { return false })
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if *seen != *value {
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*draft, *seen, *pending = *value, *value, false
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}
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changed := false
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col.Children(func() {
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edited, bad := false, ""
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ui.Row(c).Gap(d.Unit() * 2).AlignItems(ui.Center).Children(func() {
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start, end := cfg, cfg
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start.label, end.label = core.Msg(c, "time_range_picker.start"), core.Msg(c, "time_range_picker.end")
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start.problem, end.problem = *problem, *problem
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_, e1, b1 := timeEditor(c, &draft.Start, start)
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ui.Text(c, "–").TextColor(k.TextMuted).Role(ui.RoleNone)
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_, e2, b2 := timeEditor(c, &draft.End, end)
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edited, bad = e1 || e2, b1
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if bad == "" {
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bad = b2
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}
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if draft.Overnight() && opts.AllowOvernight {
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ui.Text(c, core.Msg(c, "time_range_picker.next_day")).FontSize(core.FontSize(c, theme.CaptionSize)).TextColor(k.AccentText)
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}
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})
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p := bad
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if p == "" {
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p = timeRangeProblem(c, *draft, cfg, opts.AllowOvernight)
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}
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if p != *problem {
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*problem = p
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c.Invalidate()
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}
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*pending = *pending || edited
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if *pending && p == "" {
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if *draft != *value {
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slog.Debug("mujica: time_range_picker change", "from", *value, "to", *draft)
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*value, *seen, changed = *draft, *draft, true
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}
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*pending = false
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}
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core.DatetimeError(c, *problem)
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})
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return DateTimeResult{Element: col, changed: changed}
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}
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// timeRangeProblem explains why r cannot be written, or returns "".
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func timeRangeProblem(c *ui.Context, r TimeRange, cfg timeConfig, overnight bool) string {
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for _, t := range []TimeOfDay{r.Start, r.End} {
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if p := timePickerProblem(c, t, cfg); p != "" {
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return p
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}
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}
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switch {
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case r.Start == r.End:
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return core.Msg(c, "time_range_picker.same")
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case r.Overnight() && !overnight:
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return core.Msg(c, "time_range_picker.order")
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}
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return ""
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}
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