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package main
import "github.com/mattn/go-runewidth"
import "github.com/nsf/termbox-go"
const chars = "nnnnnnnnnbbbbbbbbbuuuuuuuuuBBBBBBBBB"
var output_mode = termbox.OutputNormal
func next_char(current int) int {
current++
if current >= len(chars) {
return 0
}
return current
}
func print_combinations_table(sx, sy int, attrs []termbox.Attribute) {
var bg termbox.Attribute
current_char := 0
y := sy
all_attrs := []termbox.Attribute{
0,
termbox.AttrBold,
termbox.AttrUnderline,
termbox.AttrBold | termbox.AttrUnderline,
}
draw_line := func() {
x := sx
for _, a := range all_attrs {
for c := termbox.ColorDefault; c <= termbox.ColorWhite; c++ {
fg := a | c
termbox.SetCell(x, y, rune(chars[current_char]), fg, bg)
current_char = next_char(current_char)
x++
}
}
}
for _, a := range attrs {
for c := termbox.ColorDefault; c <= termbox.ColorWhite; c++ {
bg = a | c
draw_line()
y++
}
}
}
func print_wide(x, y int, s string) {
red := false
for _, r := range s {
c := termbox.ColorDefault
if red {
c = termbox.ColorRed
}
termbox.SetCell(x, y, r, termbox.ColorDefault, c)
w := runewidth.RuneWidth(r)
if w == 0 || (w == 2 && runewidth.IsAmbiguousWidth(r)) {
w = 1
}
x += w
red = !red
}
}
const hello_world = "こんにちは世界"
func draw_all() {
termbox.Clear(termbox.ColorDefault, termbox.ColorDefault)
switch output_mode {
case termbox.OutputNormal:
print_combinations_table(1, 1, []termbox.Attribute{
0,
termbox.AttrBold,
})
print_combinations_table(2+len(chars), 1, []termbox.Attribute{
termbox.AttrReverse,
})
print_wide(2+len(chars), 11, hello_world)
case termbox.OutputGrayscale:
for y := 0; y < 26; y++ {
for x := 0; x < 26; x++ {
termbox.SetCell(x, y, 'n',
termbox.Attribute(x+1),
termbox.Attribute(y+1))
termbox.SetCell(x+27, y, 'b',
termbox.Attribute(x+1)|termbox.AttrBold,
termbox.Attribute(26-y))
termbox.SetCell(x+54, y, 'u',
termbox.Attribute(x+1)|termbox.AttrUnderline,
termbox.Attribute(y+1))
}
termbox.SetCell(82, y, 'd',
termbox.Attribute(y+1),
termbox.ColorDefault)
termbox.SetCell(83, y, 'd',
termbox.ColorDefault,
termbox.Attribute(26-y))
}
case termbox.Output216:
for r := 0; r < 6; r++ {
for g := 0; g < 6; g++ {
for b := 0; b < 6; b++ {
y := r
x := g + 6*b
c1 := termbox.Attribute(1 + r*36 + g*6 + b)
bg := termbox.Attribute(1 + g*36 + b*6 + r)
c2 := termbox.Attribute(1 + b*36 + r*6 + g)
bc1 := c1 | termbox.AttrBold
uc1 := c1 | termbox.AttrUnderline
bc2 := c2 | termbox.AttrBold
uc2 := c2 | termbox.AttrUnderline
termbox.SetCell(x, y, 'n', c1, bg)
termbox.SetCell(x, y+6, 'b', bc1, bg)
termbox.SetCell(x, y+12, 'u', uc1, bg)
termbox.SetCell(x, y+18, 'B', bc1|uc1, bg)
termbox.SetCell(x+37, y, 'n', c2, bg)
termbox.SetCell(x+37, y+6, 'b', bc2, bg)
termbox.SetCell(x+37, y+12, 'u', uc2, bg)
termbox.SetCell(x+37, y+18, 'B', bc2|uc2, bg)
}
c1 := termbox.Attribute(1 + g*6 + r*36)
c2 := termbox.Attribute(6 + g*6 + r*36)
termbox.SetCell(74+g, r, 'd', c1, termbox.ColorDefault)
termbox.SetCell(74+g, r+6, 'd', c2, termbox.ColorDefault)
termbox.SetCell(74+g, r+12, 'd', termbox.ColorDefault, c1)
termbox.SetCell(74+g, r+18, 'd', termbox.ColorDefault, c2)
}
}
case termbox.Output256:
for y := 0; y < 4; y++ {
for x := 0; x < 8; x++ {
for z := 0; z < 8; z++ {
bg := termbox.Attribute(1 + y*64 + x*8 + z)
c1 := termbox.Attribute(256 - y*64 - x*8 - z)
c2 := termbox.Attribute(1 + y*64 + z*8 + x)
c3 := termbox.Attribute(256 - y*64 - z*8 - x)
c4 := termbox.Attribute(1 + y*64 + x*4 + z*4)
bold := c2 | termbox.AttrBold
under := c3 | termbox.AttrUnderline
both := c1 | termbox.AttrBold | termbox.AttrUnderline
termbox.SetCell(z+8*x, y, ' ', 0, bg)
termbox.SetCell(z+8*x, y+5, 'n', c4, bg)
termbox.SetCell(z+8*x, y+10, 'b', bold, bg)
termbox.SetCell(z+8*x, y+15, 'u', under, bg)
termbox.SetCell(z+8*x, y+20, 'B', both, bg)
}
}
}
for x := 0; x < 12; x++ {
for y := 0; y < 2; y++ {
c1 := termbox.Attribute(233 + y*12 + x)
termbox.SetCell(66+x, y, 'd', c1, termbox.ColorDefault)
termbox.SetCell(66+x, 2+y, 'd', termbox.ColorDefault, c1)
}
}
for x := 0; x < 6; x++ {
for y := 0; y < 6; y++ {
c1 := termbox.Attribute(17 + x*6 + y*36)
c2 := termbox.Attribute(17 + 5 + x*6 + y*36)
termbox.SetCell(66+x, 6+y, 'd', c1, termbox.ColorDefault)
termbox.SetCell(66+x, 12+y, 'd', c2, termbox.ColorDefault)
termbox.SetCell(72+x, 6+y, 'd', termbox.ColorDefault, c1)
termbox.SetCell(72+x, 12+y, 'd', termbox.ColorDefault, c2)
}
}
}
termbox.Flush()
}
var available_modes = []termbox.OutputMode{
termbox.OutputNormal,
termbox.OutputGrayscale,
termbox.Output216,
termbox.Output256,
}
var output_mode_index = 0
func switch_output_mode(direction int) {
output_mode_index += direction
if output_mode_index < 0 {
output_mode_index = len(available_modes) - 1
} else if output_mode_index >= len(available_modes) {
output_mode_index = 0
}
output_mode = termbox.SetOutputMode(available_modes[output_mode_index])
termbox.Clear(termbox.ColorDefault, termbox.ColorDefault)
termbox.Sync()
}
func main() {
err := termbox.Init()
if err != nil {
panic(err)
}
defer termbox.Close()
draw_all()
loop:
for {
switch ev := termbox.PollEvent(); ev.Type {
case termbox.EventKey:
switch ev.Key {
case termbox.KeyEsc:
break loop
case termbox.KeyArrowUp, termbox.KeyArrowRight:
switch_output_mode(1)
draw_all()
case termbox.KeyArrowDown, termbox.KeyArrowLeft:
switch_output_mode(-1)
draw_all()
}
case termbox.EventResize:
draw_all()
}
}
}
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