package termboxUtil import ( "fmt" "strings" "github.com/nsf/termbox-go" ) type termboxControl interface { GetX() int SetX(int) GetY() int SetY(int) GetWidth() int SetWidth(int) GetHeight() int SetHeight(int) HandleKeyPress(termbox.Event) bool Draw() } // TextAlignment is an int value for how we're aligning text type TextAlignment int const ( // AlignLeft Aligns text to the left AlignLeft = iota // AlignCenter Aligns text to the center AlignCenter // AlignRight Aligns text to the right AlignRight ) /* Basic Input Helpers */ // KeyIsAlphaNumeric Returns whether the termbox event is an // Alpha-Numeric Key Press func KeyIsAlphaNumeric(event termbox.Event) bool { return KeyIsAlpha(event) || KeyIsNumeric(event) } // KeyIsAlpha Returns whether the termbox event is a // alphabetic Key press func KeyIsAlpha(event termbox.Event) bool { k := event.Ch if (k >= 'a' && k <= 'z') || (k >= 'A' && k <= 'Z') { return true } return false } // KeyIsNumeric Returns whether the termbox event is a // numeric Key press func KeyIsNumeric(event termbox.Event) bool { k := event.Ch if k >= '0' && k <= '9' { return true } return false } // KeyIsSymbol Returns whether the termbox event is a // symbol Key press func KeyIsSymbol(event termbox.Event) bool { symbols := []rune{'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '-', '_', '=', '+', '[', ']', '{', '}', '|', ';', ':', '"', '\'', ',', '<', '.', '>', '/', '?', '`', '~'} k := event.Ch for i := range symbols { if k == symbols[i] { return true } } return false } /* Basic Output Helpers */ // DrawStringAtPoint Draw a string of text at x, y with foreground color fg, background color bg func DrawStringAtPoint(str string, x int, y int, fg termbox.Attribute, bg termbox.Attribute) (int, int) { xPos := x for _, runeValue := range str { termbox.SetCell(xPos, y, runeValue, fg, bg) xPos++ } return xPos, y } // FillWithChar Fills from x1,y1 through x2,y2 with the rune r, foreground color fg, background bg func FillWithChar(r rune, x1, y1, x2, y2 int, fg termbox.Attribute, bg termbox.Attribute) { for xx := x1; xx <= x2; xx++ { for yx := y1; yx <= y2; yx++ { termbox.SetCell(xx, yx, r, fg, bg) } } } // DrawBorder Draw a border around the area inside x1,y1 -> x2, y2 func DrawBorder(x1, y1, x2, y2 int, fg termbox.Attribute, bg termbox.Attribute) { termbox.SetCell(x1, y1, '+', fg, bg) FillWithChar('-', x1+1, y1, x2-1, y1, fg, bg) termbox.SetCell(x2, y1, '+', fg, bg) FillWithChar('|', x1, y1+1, x1, y2-1, fg, bg) FillWithChar('|', x2, y1+1, x2, y2-1, fg, bg) termbox.SetCell(x1, y2, '+', fg, bg) FillWithChar('-', x1+1, y2, x2-1, y2, fg, bg) termbox.SetCell(x2, y2, '+', fg, bg) } // AlignText Aligns the text txt within width characters using the specified alignment func AlignText(txt string, width int, align TextAlignment) string { numSpaces := width - len(txt) switch align { case AlignCenter: if numSpaces/2 > 0 { return fmt.Sprintf("%s%s%s", strings.Repeat(" ", numSpaces/2), txt, strings.Repeat(" ", numSpaces/2), ) } return txt case AlignRight: return fmt.Sprintf("%s%s", strings.Repeat(" ", numSpaces), txt) default: if numSpaces >= 0 { return fmt.Sprintf("%s%s", txt, strings.Repeat(" ", numSpaces)) } return txt } } /* More advanced things are in their respective files */