init: pristine aerc 0.20.0 source

commands/help.go

@@ -0,0 +1,81 @@
+package commands
+
+import (
+	"fmt"
+
+	"git.sr.ht/~rjarry/aerc/app"
+)
+
+type Help struct {
+	Topic string `opt:"topic" action:"ParseTopic" default:"aerc" complete:"CompleteTopic" desc:"Help topic."`
+}
+
+var pages = []string{
+	"aerc",
+	"accounts",
+	"binds",
+	"config",
+	"imap",
+	"jmap",
+	"notmuch",
+	"search",
+	"sendmail",
+	"smtp",
+	"stylesets",
+	"templates",
+	"tutorial",
+	"patch",
+	"keys",
+}
+
+func init() {
+	Register(Help{})
+}
+
+func (Help) Description() string {
+	return "Display one of aerc's man pages in the embedded terminal."
+}
+
+func (Help) Context() CommandContext {
+	return GLOBAL
+}
+
+func (Help) Aliases() []string {
+	return []string{"help", "man"}
+}
+
+func (*Help) CompleteTopic(arg string) []string {
+	return FilterList(pages, arg, nil)
+}
+
+func (h *Help) ParseTopic(arg string) error {
+	for _, page := range pages {
+		if arg == page {
+			if arg != "aerc" {
+				arg = "aerc-" + arg
+			}
+			h.Topic = arg
+			return nil
+		}
+	}
+	return fmt.Errorf("unknown topic %q", arg)
+}
+
+func (h Help) Execute(args []string) error {
+	if h.Topic == "aerc-keys" {
+		app.AddDialog(app.DefaultDialog(
+			app.NewListBox(
+				"Bindings: Press <Esc> or <Enter> to close. "+
+					"Start typing to filter bindings.",
+				app.HumanReadableBindings(),
+				app.SelectedAccountUiConfig(),
+				func(_ string) {
+					app.CloseDialog()
+				},
+			),
+		))
+		return nil
+	}
+	term := Term{Cmd: []string{"man", h.Topic}}
+	return term.Execute(args)
+}