Add gallery core and command: routes, sidebar, search, code panel, browser hook

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

gallery/app.go

@@ -0,0 +1,109 @@
+package gallery
+
+import (
+	"log/slog"
+	"strings"
+	"sync"
+
+	"github.com/egoist/mygo/ui"
+	"github.com/egoist/mygo/ui/editor"
+)
+
+const keepEvents = 6
+
+// App is the gallery that desktop and browser share.
+type App struct {
+	router *ui.Router
+	query  string
+	mode   int
+	events []string
+	codes  map[string]*editor.State
+
+	mu   sync.Mutex
+	snap Snapshot
+}
+
+// Snapshot is what the browser hook reads between frames.
+type Snapshot struct {
+	Page  string
+	Built bool
+}
+
+// New opens the gallery at path.
+func New(path string) *App {
+	return &App{router: ui.NewRouter(path), codes: map[string]*editor.State{}}
+}
+
+// Snapshot returns the state of the last built frame.
+func (a *App) Snapshot() Snapshot {
+	a.mu.Lock()
+	defer a.mu.Unlock()
+	return a.snap
+}
+
+func (a *App) View(c *ui.Context) {
+	switch a.mode {
+	case 1:
+		c.SetTheme(ui.LightTheme())
+	case 2:
+		c.SetTheme(ui.DarkTheme())
+	}
+	ui.Column(c).Fill().Children(func() {
+		a.topBar(c)
+		ui.Row(c).Grow(1).AlignItems(ui.Stretch).Children(func() {
+			a.sidebar(c)
+			ui.Column(c).Grow(1).Children(func() {
+				if strings.TrimSpace(a.query) != "" {
+					a.results(c)
+					return
+				}
+				a.pages(c)
+			})
+		})
+		a.statusBar(c)
+	})
+	a.mu.Lock()
+	a.snap = Snapshot{Page: a.router.Location(), Built: true}
+	a.mu.Unlock()
+}
+
+// Go opens path and clears the search.
+func (a *App) Go(path string) {
+	a.query = ""
+	if path != a.router.Location() {
+		slog.Debug("crychic: gallery go", "path", path)
+		a.router.Push(path)
+	}
+}
+
+// logger keeps a demo's events for the status strip.
+func (a *App) logger(e Entry) func(string) {
+	return func(ev string) {
+		// The strip shows the event; the log never does.
+		slog.Debug("crychic: gallery event", "entry", e.Name)
+		a.events = append(a.events, e.Name+": "+ev)
+		a.events = a.events[max(0, len(a.events)-keepEvents):]
+	}
+}
+
+func (a *App) code(e Entry) *editor.State {
+	st, ok := a.codes[e.Path()]
+	if !ok {
+		buf := editor.NewBuffer(e.Code())
+		buf.SetLanguage(editor.LanguageFor("demo.go"))
+		st = &editor.State{Buffer: buf, ReadOnly: true}
+		a.codes[e.Path()] = st
+	}
+	return st
+}
+
+func matches(q string) []Entry {
+	q = strings.ToLower(strings.TrimSpace(q))
+	var out []Entry
+	for _, e := range entries {
+		if strings.Contains(strings.ToLower(e.Name+" "+e.Category+" "+e.Summary), q) {
+			out = append(out, e)
+		}
+	}
+	return out
+}