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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
// Copyright 2014 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 (
"fmt"
"log"
"strings"
"github.com/jroimartin/gocui"
)
const delta = 1
var (
views = []string{}
curView = -1
idxView = 0
)
func main() {
g, err := gocui.NewGui(gocui.OutputNormal)
if err != nil {
log.Panicln(err)
}
defer g.Close()
g.Highlight = true
g.SelFgColor = gocui.ColorRed
g.SetManagerFunc(layout)
if err := initKeybindings(g); err != nil {
log.Panicln(err)
}
if err := newView(g); err != nil {
log.Panicln(err)
}
if err := g.MainLoop(); err != nil && err != gocui.ErrQuit {
log.Panicln(err)
}
}
func layout(g *gocui.Gui) error {
maxX, _ := g.Size()
v, err := g.SetView("help", maxX-25, 0, maxX-1, 8)
if err != nil {
if err != gocui.ErrUnknownView {
return err
}
fmt.Fprintln(v, "KEYBINDINGS")
fmt.Fprintln(v, "Space: New View")
fmt.Fprintln(v, "Tab: Next View")
fmt.Fprintln(v, "← ↑ → ↓: Move View")
fmt.Fprintln(v, "Backspace: Delete View")
fmt.Fprintln(v, "t: Set view on top")
fmt.Fprintln(v, "^C: Exit")
}
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("", gocui.KeySpace, gocui.ModNone,
func(g *gocui.Gui, v *gocui.View) error {
return newView(g)
}); err != nil {
return err
}
if err := g.SetKeybinding("", gocui.KeyBackspace2, gocui.ModNone,
func(g *gocui.Gui, v *gocui.View) error {
return delView(g)
}); err != nil {
return err
}
if err := g.SetKeybinding("", gocui.KeyTab, gocui.ModNone,
func(g *gocui.Gui, v *gocui.View) error {
return nextView(g, true)
}); err != nil {
return err
}
if err := g.SetKeybinding("", gocui.KeyArrowLeft, gocui.ModNone,
func(g *gocui.Gui, v *gocui.View) error {
return moveView(g, v, -delta, 0)
}); err != nil {
return err
}
if err := g.SetKeybinding("", gocui.KeyArrowRight, gocui.ModNone,
func(g *gocui.Gui, v *gocui.View) error {
return moveView(g, v, delta, 0)
}); err != nil {
return err
}
if err := g.SetKeybinding("", gocui.KeyArrowDown, gocui.ModNone,
func(g *gocui.Gui, v *gocui.View) error {
return moveView(g, v, 0, delta)
}); err != nil {
return err
}
if err := g.SetKeybinding("", gocui.KeyArrowUp, gocui.ModNone,
func(g *gocui.Gui, v *gocui.View) error {
return moveView(g, v, 0, -delta)
}); err != nil {
return err
}
if err := g.SetKeybinding("", 't', gocui.ModNone, ontop); err != nil {
return err
}
return nil
}
func quit(g *gocui.Gui, v *gocui.View) error {
return gocui.ErrQuit
}
func newView(g *gocui.Gui) error {
maxX, maxY := g.Size()
name := fmt.Sprintf("v%v", idxView)
v, err := g.SetView(name, maxX/2-5, maxY/2-5, maxX/2+5, maxY/2+5)
if err != nil {
if err != gocui.ErrUnknownView {
return err
}
v.Wrap = true
fmt.Fprintln(v, strings.Repeat(name+" ", 30))
}
if _, err := g.SetCurrentView(name); err != nil {
return err
}
views = append(views, name)
curView = len(views) - 1
idxView += 1
return nil
}
func delView(g *gocui.Gui) error {
if len(views) <= 1 {
return nil
}
if err := g.DeleteView(views[curView]); err != nil {
return err
}
views = append(views[:curView], views[curView+1:]...)
return nextView(g, false)
}
func nextView(g *gocui.Gui, disableCurrent bool) error {
next := curView + 1
if next > len(views)-1 {
next = 0
}
if _, err := g.SetCurrentView(views[next]); err != nil {
return err
}
curView = next
return nil
}
func moveView(g *gocui.Gui, v *gocui.View, dx, dy int) error {
name := v.Name()
x0, y0, x1, y1, err := g.ViewPosition(name)
if err != nil {
return err
}
if _, err := g.SetView(name, x0+dx, y0+dy, x1+dx, y1+dy); err != nil {
return err
}
return nil
}
func ontop(g *gocui.Gui, v *gocui.View) error {
_, err := g.SetViewOnTop(views[curView])
return err
}
|
