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text_renderer.go
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package main
import "strings"
type TextRenderer struct {
Value int
}
func (t TextRenderer) Render() string {
boxChars := []rune{
'─', '│', '┌', '┐', '└', '┘',
'├', '┤', '┬', '┴', '┼', '╱',
'╲', '╴', '╵', '╶', '╷',
}
rows := 13
cols := 9
glyph := make([]rune, rows*cols)
ones := t.Value % 10
tens := t.Value / 10 % 10
hundreds := t.Value / 100 % 10
thousands := t.Value / 1000 % 10
// Add center staves, which are always there
for row := 0; row < rows; row += 1 {
char := boxChars[1]
if row == 0 {
char = boxChars[16]
}
if row == 12 {
char = boxChars[14]
}
for col := 0; col < cols; col += 1 {
if col == 4 {
glyph[row*cols+col] = char
} else {
glyph[row*cols+col] = ' '
}
}
}
switch ones {
case 1:
offset := 4
glyph[offset] = boxChars[2]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
glyph[offset+4] = boxChars[0]
case 2:
offset := 4 + cols*4
glyph[offset] = boxChars[6]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
glyph[offset+4] = boxChars[0]
case 3:
offset := 5
glyph[offset+cols] = boxChars[12]
glyph[offset+cols*2+1] = boxChars[12]
glyph[offset+cols*3+2] = boxChars[12]
case 4:
offset := 8
glyph[offset+cols-1] = boxChars[11]
glyph[offset+cols*2-2] = boxChars[11]
glyph[offset+cols*3-3] = boxChars[11]
case 5:
offset := 4
glyph[offset] = boxChars[2]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
glyph[offset+4] = boxChars[0]
offset = 8
glyph[offset+cols-1] = boxChars[11]
glyph[offset+cols*2-2] = boxChars[11]
glyph[offset+cols*3-3] = boxChars[11]
case 6:
offset := 8
glyph[offset] = boxChars[16]
glyph[offset+cols] = boxChars[1]
glyph[offset+cols*2] = boxChars[1]
glyph[offset+cols*3] = boxChars[1]
glyph[offset+cols*4] = boxChars[14]
case 7:
offset := 4
glyph[offset] = boxChars[2]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
glyph[offset+4] = boxChars[3]
offset = 8
glyph[offset+cols] = boxChars[1]
glyph[offset+cols*2] = boxChars[1]
glyph[offset+cols*3] = boxChars[1]
glyph[offset+cols*4] = boxChars[14]
case 8:
offset := 8
glyph[offset] = boxChars[16]
glyph[offset+cols] = boxChars[1]
glyph[offset+cols*2] = boxChars[1]
glyph[offset+cols*3] = boxChars[1]
offset = 4 + cols*4
glyph[offset] = boxChars[6]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
glyph[offset+4] = boxChars[5]
case 9:
offset := 4
glyph[offset] = boxChars[2]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
glyph[offset+4] = boxChars[3]
offset = 8
glyph[offset+cols] = boxChars[1]
glyph[offset+cols*2] = boxChars[1]
glyph[offset+cols*3] = boxChars[1]
offset = 4 + cols*4
glyph[offset] = boxChars[6]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
glyph[offset+4] = boxChars[5]
default:
// zero, do nothing
}
switch tens {
case 1:
glyph[0] = boxChars[0]
glyph[1] = boxChars[0]
glyph[2] = boxChars[0]
glyph[3] = boxChars[0]
if glyph[4] == boxChars[16] {
glyph[4] = boxChars[3]
} else {
glyph[4] = boxChars[8]
}
case 2:
offset := cols * 4
glyph[offset] = boxChars[0]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
if glyph[offset+4] == boxChars[6] {
glyph[offset+4] = boxChars[10]
} else {
glyph[offset+4] = boxChars[7]
}
case 3:
offset := 3
glyph[offset+cols] = boxChars[11]
glyph[offset+cols*2-1] = boxChars[11]
glyph[offset+cols*3-2] = boxChars[11]
case 4:
glyph[cols+1] = boxChars[12]
glyph[cols*2+2] = boxChars[12]
glyph[cols*3+3] = boxChars[12]
case 5:
glyph[0] = boxChars[0]
glyph[1] = boxChars[0]
glyph[2] = boxChars[0]
glyph[3] = boxChars[0]
if glyph[4] == boxChars[16] {
glyph[4] = boxChars[3]
} else {
glyph[4] = boxChars[8]
}
glyph[cols+1] = boxChars[12]
glyph[cols*2+2] = boxChars[12]
glyph[cols*3+3] = boxChars[12]
case 6:
glyph[0] = boxChars[16]
glyph[cols] = boxChars[1]
glyph[cols*2] = boxChars[1]
glyph[cols*3] = boxChars[1]
glyph[cols*4] = boxChars[14]
case 7:
glyph[0] = boxChars[2]
glyph[1] = boxChars[0]
glyph[2] = boxChars[0]
glyph[3] = boxChars[0]
if glyph[4] == boxChars[16] {
glyph[4] = boxChars[3]
} else {
glyph[4] = boxChars[8]
}
glyph[cols] = boxChars[1]
glyph[cols*2] = boxChars[1]
glyph[cols*3] = boxChars[1]
glyph[cols*4] = boxChars[14]
case 8:
glyph[0] = boxChars[16]
glyph[cols] = boxChars[1]
glyph[cols*2] = boxChars[1]
glyph[cols*3] = boxChars[1]
offset := cols * 4
glyph[offset] = boxChars[4]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
if glyph[offset+4] == boxChars[6] {
glyph[offset+4] = boxChars[10]
} else {
glyph[offset+4] = boxChars[7]
}
case 9:
glyph[0] = boxChars[2]
glyph[1] = boxChars[0]
glyph[2] = boxChars[0]
glyph[3] = boxChars[0]
if glyph[4] == boxChars[16] {
glyph[4] = boxChars[3]
} else {
glyph[4] = boxChars[8]
}
glyph[cols] = boxChars[1]
glyph[cols*2] = boxChars[1]
glyph[cols*3] = boxChars[1]
offset := cols * 4
glyph[offset] = boxChars[4]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
if glyph[offset+4] == boxChars[6] {
glyph[offset+4] = boxChars[10]
} else {
glyph[offset+4] = boxChars[7]
}
default:
// zero, do nothing
}
switch hundreds {
case 1:
offset := cols*(rows-1) + 4
glyph[offset] = boxChars[4]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
glyph[offset+4] = boxChars[0]
case 2:
offset := cols*(rows-5) + 4
glyph[offset] = boxChars[6]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
glyph[offset+4] = boxChars[0]
case 3:
offset := cols*(rows-2) + 5
glyph[offset] = boxChars[11]
glyph[offset-cols+1] = boxChars[11]
glyph[offset-cols*2+2] = boxChars[11]
case 4:
offset := cols*(rows-4) + 5
glyph[offset] = boxChars[12]
glyph[offset+cols+1] = boxChars[12]
glyph[offset+cols*2+2] = boxChars[12]
case 5:
offset := cols*(rows-4) + 5
glyph[offset] = boxChars[12]
glyph[offset+cols+1] = boxChars[12]
glyph[offset+cols*2+2] = boxChars[12]
offset = cols*(rows-1) + 4
glyph[offset] = boxChars[4]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
glyph[offset+4] = boxChars[0]
case 6:
offset := rows*cols - 1
glyph[offset] = boxChars[14]
glyph[offset-cols] = boxChars[1]
glyph[offset-cols*2] = boxChars[1]
glyph[offset-cols*3] = boxChars[1]
glyph[offset-cols*4] = boxChars[16]
case 7:
offset := rows*cols - 1
glyph[offset-cols] = boxChars[1]
glyph[offset-cols*2] = boxChars[1]
glyph[offset-cols*3] = boxChars[1]
glyph[offset-cols*4] = boxChars[16]
offset = cols*(rows-1) + 4
glyph[offset] = boxChars[4]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
glyph[offset+4] = boxChars[5]
case 8:
offset := cols*(rows-5) + 4
glyph[offset] = boxChars[6]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
glyph[offset+4] = boxChars[3]
offset = rows*cols - 1
glyph[offset] = boxChars[14]
glyph[offset-cols] = boxChars[1]
glyph[offset-cols*2] = boxChars[1]
glyph[offset-cols*3] = boxChars[1]
case 9:
offset := cols*(rows-5) + 4
glyph[offset] = boxChars[6]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
glyph[offset+4] = boxChars[3]
offset = rows*cols - 1
glyph[offset-cols] = boxChars[1]
glyph[offset-cols*2] = boxChars[1]
glyph[offset-cols*3] = boxChars[1]
offset = cols*(rows-1) + 4
glyph[offset] = boxChars[4]
glyph[offset+1] = boxChars[0]
glyph[offset+2] = boxChars[0]
glyph[offset+3] = boxChars[0]
glyph[offset+4] = boxChars[5]
default:
// zero, do nothing
}
switch thousands {
case 1:
offset := cols*rows - 5
if glyph[offset] == boxChars[4] {
glyph[offset] = boxChars[9]
} else {
glyph[offset] = boxChars[5]
}
glyph[offset-1] = boxChars[0]
glyph[offset-2] = boxChars[0]
glyph[offset-3] = boxChars[0]
glyph[offset-4] = boxChars[0]
case 2:
offset := cols*(rows-4) - 5
if glyph[offset] == boxChars[6] {
glyph[offset] = boxChars[10]
} else {
glyph[offset] = boxChars[7]
}
glyph[offset-1] = boxChars[0]
glyph[offset-2] = boxChars[0]
glyph[offset-3] = boxChars[0]
glyph[offset-4] = boxChars[0]
case 3:
offset := cols*(rows-1) - 6
glyph[offset] = boxChars[12]
glyph[offset-cols-1] = boxChars[12]
glyph[offset-cols*2-2] = boxChars[12]
case 4:
offset := cols*(rows-1) - 8
glyph[offset] = boxChars[11]
glyph[offset-cols+1] = boxChars[11]
glyph[offset-cols*2+2] = boxChars[11]
case 5:
offset := cols*(rows-1) - 8
glyph[offset] = boxChars[11]
glyph[offset-cols+1] = boxChars[11]
glyph[offset-cols*2+2] = boxChars[11]
offset = cols*rows - 5
if glyph[offset] == boxChars[4] {
glyph[offset] = boxChars[9]
} else {
glyph[offset] = boxChars[5]
}
glyph[offset-1] = boxChars[0]
glyph[offset-2] = boxChars[0]
glyph[offset-3] = boxChars[0]
glyph[offset-4] = boxChars[0]
case 6:
offset := cols * (rows - 1)
glyph[offset] = boxChars[14]
glyph[offset-cols] = boxChars[1]
glyph[offset-cols*2] = boxChars[1]
glyph[offset-cols*3] = boxChars[1]
glyph[offset-cols*4] = boxChars[16]
case 7:
offset := cols*rows - 5
if glyph[offset] == boxChars[4] {
glyph[offset] = boxChars[9]
} else {
glyph[offset] = boxChars[5]
}
glyph[offset-1] = boxChars[0]
glyph[offset-2] = boxChars[0]
glyph[offset-3] = boxChars[0]
glyph[offset-4] = boxChars[4]
offset = cols * (rows - 1)
glyph[offset-cols] = boxChars[1]
glyph[offset-cols*2] = boxChars[1]
glyph[offset-cols*3] = boxChars[1]
glyph[offset-cols*4] = boxChars[16]
case 8:
offset := cols*(rows-4) - 5
if glyph[offset] == boxChars[6] {
glyph[offset] = boxChars[10]
} else {
glyph[offset] = boxChars[7]
}
glyph[offset-1] = boxChars[0]
glyph[offset-2] = boxChars[0]
glyph[offset-3] = boxChars[0]
glyph[offset-4] = boxChars[2]
offset = cols * (rows - 1)
glyph[offset] = boxChars[14]
glyph[offset-cols] = boxChars[1]
glyph[offset-cols*2] = boxChars[1]
glyph[offset-cols*3] = boxChars[1]
case 9:
offset := cols*(rows-4) - 5
if glyph[offset] == boxChars[6] {
glyph[offset] = boxChars[10]
} else {
glyph[offset] = boxChars[7]
}
glyph[offset-1] = boxChars[0]
glyph[offset-2] = boxChars[0]
glyph[offset-3] = boxChars[0]
glyph[offset-4] = boxChars[2]
offset = cols * (rows - 1)
glyph[offset-cols] = boxChars[1]
glyph[offset-cols*2] = boxChars[1]
glyph[offset-cols*3] = boxChars[1]
offset = cols*rows - 5
if glyph[offset] == boxChars[4] {
glyph[offset] = boxChars[9]
} else {
glyph[offset] = boxChars[5]
}
glyph[offset-1] = boxChars[0]
glyph[offset-2] = boxChars[0]
glyph[offset-3] = boxChars[0]
glyph[offset-4] = boxChars[4]
default:
// zero, do nothing
}
sb := strings.Builder{}
for row := 0; row < rows; row += 1 {
if row > 0 {
sb.WriteString("\n")
}
for col := 0; col < cols; col += 1 {
sb.WriteRune(glyph[row*cols+col])
}
}
return sb.String()
}