1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
// Copyright 2015 The gocui Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"encoding/hex"
"fmt"
"io"
"log"
"os"
"github.com/jroimartin/gocui"
)
func main() {
g, err := gocui.NewGui(gocui.OutputNormal)
if err != nil {
log.Fatalln(err)
}
defer g.Close()
g.Cursor = true
g.SetManagerFunc(layout)
if err := initKeybindings(g); err != nil {
log.Fatalln(err)
}
if err := g.MainLoop(); err != nil && err != gocui.ErrQuit {
log.Fatalln(err)
}
}
func layout(g *gocui.Gui) error {
maxX, _ := g.Size()
if v, err := g.SetView("help", maxX-23, 0, maxX-1, 5); err != nil {
if err != gocui.ErrUnknownView {
return err
}
fmt.Fprintln(v, "KEYBINDINGS")
fmt.Fprintln(v, "↑ ↓: Seek input")
fmt.Fprintln(v, "a: Enable autoscroll")
fmt.Fprintln(v, "^C: Exit")
}
if v, err := g.SetView("stdin", 0, 0, 80, 35); err != nil {
if err != gocui.ErrUnknownView {
return err
}
if _, err := g.SetCurrentView("stdin"); err != nil {
return err
}
dumper := hex.Dumper(v)
if _, err := io.Copy(dumper, os.Stdin); err != nil {
return err
}
v.Wrap = true
}
return nil
}
func initKeybindings(g *gocui.Gui) error {
if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, quit); err != nil {
return err
}
if err := g.SetKeybinding("stdin", 'a', gocui.ModNone, autoscroll); err != nil {
return err
}
if err := g.SetKeybinding("stdin", gocui.KeyArrowUp, gocui.ModNone,
func(g *gocui.Gui, v *gocui.View) error {
scrollView(v, -1)
return nil
}); err != nil {
return err
}
if err := g.SetKeybinding("stdin", gocui.KeyArrowDown, gocui.ModNone,
func(g *gocui.Gui, v *gocui.View) error {
scrollView(v, 1)
return nil
}); err != nil {
return err
}
return nil
}
func quit(g *gocui.Gui, v *gocui.View) error {
return gocui.ErrQuit
}
func autoscroll(g *gocui.Gui, v *gocui.View) error {
v.Autoscroll = true
return nil
}
func scrollView(v *gocui.View, dy int) error {
if v != nil {
v.Autoscroll = false
ox, oy := v.Origin()
if err := v.SetOrigin(ox, oy+dy); err != nil {
return err
}
}
return nil
}
|
