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

code/output_panel.go

@@ -0,0 +1,95 @@
+package code
+
+import (
+	"log/slog"
+
+	"github.com/egoist/mygo/ui"
+
+	"github.com/ZacharyZhang-NY/MujicaUI/core"
+	"github.com/ZacharyZhang-NY/MujicaUI/icons"
+	"github.com/ZacharyZhang-NY/MujicaUI/input"
+	"github.com/ZacharyZhang-NY/MujicaUI/theme"
+)
+
+// OutputChannel is a named stream of ANSI lines.
+type OutputChannel struct {
+	Name  string
+	Lines []string
+}
+
+// OutputPanelState is the channel, following and place.
+type OutputPanelState struct {
+	Channel int
+	// Follow keeps the newest line in view; it starts on.
+	Follow  bool
+	rows    ui.ListState
+	shown   int
+	started bool
+}
+
+// OutputPanelOptions configure an OutputPanel.
+type OutputPanelOptions struct {
+	Disabled bool
+}
+
+// OutputPanelResult is an OutputPanel and what happened in this frame.
+type OutputPanelResult struct {
+	Element *ui.Element
+	// Cleared names a channel to clear.
+	Changed bool
+	Cleared string
+}
+
+// OutputPanel shows one channel, following its tail.
+func OutputPanel(c *ui.Context, channels []OutputChannel, s *OutputPanelState, opts OutputPanelOptions) OutputPanelResult {
+	if s == nil || len(channels) == 0 {
+		panic("mujica: OutputPanel needs a state and a channel")
+	}
+	if s.Channel < 0 || s.Channel >= len(channels) {
+		panic("mujica: OutputPanel Channel out of range")
+	}
+	if !s.started {
+		s.started, s.Follow, s.shown = true, true, s.Channel
+	}
+	var res OutputPanelResult
+	res.Element = CodePanel(c).Disabled(opts.Disabled)
+	disabled := res.Element.IsDisabled()
+	res.Element.Children(func() {
+		CodeHeader(c, func() {
+			options := make([]input.SelectOption[int], len(channels))
+			for i, ch := range channels {
+				options[i] = input.SelectOption[int]{Value: i, Label: ch.Name}
+			}
+			if input.Select(c, &s.Channel, options, input.SelectOptions{Label: core.Msg(c, "output_panel.channel"), Disabled: opts.Disabled}).Changed() {
+				res.Changed = true
+				slog.Debug("mujica: output_panel channel", "channel", s.Channel)
+			}
+			ui.Spacer(c)
+			was := s.Follow
+			if input.Toggle(c, &s.Follow, core.Msg(c, "log_viewer.follow"), input.ToggleOptions{Disabled: opts.Disabled}).Changed() && s.Follow && !was {
+				s.rows.ScrollToEnd()
+			}
+			if core.IconAction(c, icons.Must("trash-2"), core.Msg(c, "output_panel.clear")).Disabled(opts.Disabled).Clicked() && !disabled {
+				res.Cleared = channels[s.Channel].Name
+				slog.Debug("mujica: output_panel clear", "channel", s.Channel)
+			}
+		})
+		if s.shown != s.Channel {
+			s.shown, s.rows = s.Channel, ui.ListState{}
+		}
+		lines := channels[s.Channel].Lines
+		if len(lines) == 0 {
+			CodeCaption(c, core.Msg(c, "output_panel.empty")).Padding(core.Density(c).Unit() * 4)
+			return
+		}
+		d := core.Density(c)
+		s.rows.FollowEnd = s.Follow
+		s.rows.Label = func(i int) string { return lines[i] }
+		ui.List(c, &s.rows, len(lines), func(i int) {
+			ui.Row(c).MinHeight(d.ControlHeight()).Padding(0, d.Unit()*3).AlignItems(ui.Center).Children(func() {
+				ui.RichText(c, CodeAnsiSpans(c, lines[i])...).Font(theme.MonoFont).FontSize(core.FontSize(c, CodeSize)).Grow(1).MinWidth(0)
+			})
+		}).Grow(1).MinHeight(d.ControlHeight()*3).Padding(d.Unit(), 0)
+	})
+	return res
+}