mirror of
https://github.com/jroimartin/gocui.git
synced 2025-04-28 13:48:51 +08:00
113 lines
2.3 KiB
Go
113 lines
2.3 KiB
Go
// Copyright 2015 The gocui Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// This example doesn't work when running `go run stdin.go`, you are suposed to pipe someting to this like: `/bin/ls | go run stdin.go`
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package main
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import (
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"encoding/hex"
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"fmt"
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"io"
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"log"
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"os"
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"github.com/awesome-gocui/gocui"
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)
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func main() {
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g, err := gocui.NewGui(gocui.OutputNormal, true)
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if err != nil {
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log.Fatalln(err)
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}
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defer g.Close()
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g.Cursor = true
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g.SetManagerFunc(layout)
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if err := initKeybindings(g); err != nil {
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log.Fatalln(err)
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}
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if err := g.MainLoop(); err != nil && !gocui.IsQuit(err) {
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log.Fatalln(err)
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}
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}
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func layout(g *gocui.Gui) error {
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maxX, _ := g.Size()
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if v, err := g.SetView("help", maxX-23, 0, maxX-1, 5, 0); err != nil {
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if !gocui.IsUnknownView(err) {
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return err
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}
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fmt.Fprintln(v, "KEYBINDINGS")
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fmt.Fprintln(v, "↑ ↓: Seek input")
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fmt.Fprintln(v, "a: Enable autoscroll")
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fmt.Fprintln(v, "^C: Exit")
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}
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if v, err := g.SetView("stdin", 0, 0, 80, 35, 0); err != nil {
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if !gocui.IsUnknownView(err) {
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return err
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}
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v.Wrap = true
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if _, err := io.Copy(hex.Dumper(v), os.Stdin); err != nil {
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return err
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}
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if _, err := g.SetCurrentView("stdin"); err != nil {
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return err
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}
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}
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return nil
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}
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func initKeybindings(g *gocui.Gui) error {
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if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, quit); err != nil {
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return err
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}
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if err := g.SetKeybinding("stdin", 'a', gocui.ModNone, autoscroll); err != nil {
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return err
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}
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if err := g.SetKeybinding("stdin", gocui.KeyArrowUp, gocui.ModNone,
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func(g *gocui.Gui, v *gocui.View) error {
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scrollView(v, -1)
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return nil
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}); err != nil {
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return err
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}
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if err := g.SetKeybinding("stdin", gocui.KeyArrowDown, gocui.ModNone,
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func(g *gocui.Gui, v *gocui.View) error {
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scrollView(v, 1)
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return nil
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}); err != nil {
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return err
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}
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return nil
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}
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func quit(g *gocui.Gui, v *gocui.View) error {
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return gocui.ErrQuit
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}
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func autoscroll(g *gocui.Gui, v *gocui.View) error {
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v.Autoscroll = true
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return nil
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}
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func scrollView(v *gocui.View, dy int) error {
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if v != nil {
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v.Autoscroll = false
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ox, oy := v.Origin()
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if err := v.SetOrigin(ox, oy+dy); err != nil {
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return err
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}
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}
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return nil
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}
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