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package prompt
import "sync"
var (
consoleWriterMu sync.Mutex
consoleWriter ConsoleWriter
)
func registerConsoleWriter(f ConsoleWriter) {
consoleWriterMu.Lock()
defer consoleWriterMu.Unlock()
consoleWriter = f
}
// DisplayAttribute represents display attributes like Blinking, Bold, Italic and so on.
type DisplayAttribute int
const (
// DisplayReset reset all display attributes.
DisplayReset DisplayAttribute = iota
// DisplayBold set bold or increases intensity.
DisplayBold
// DisplayLowIntensity decreases intensity. Not widely supported.
DisplayLowIntensity
// DisplayItalic set italic. Not widely supported.
DisplayItalic
// DisplayUnderline set underline
DisplayUnderline
// DisplayBlink set blink (less than 150 per minute).
DisplayBlink
// DisplayRapidBlink set blink (more than 150 per minute). Not widely supported.
DisplayRapidBlink
// DisplayReverse swap foreground and background colors.
DisplayReverse
// DisplayInvisible set invisible. Not widely supported.
DisplayInvisible
// DisplayCrossedOut set characters legible, but marked for deletion. Not widely supported.
DisplayCrossedOut
// DisplayDefaultFont set primary(default) font
DisplayDefaultFont
)
// Color represents color on terminal.
type Color int
const (
// DefaultColor represents a default color.
DefaultColor Color = iota
// Low intensity
// Black represents a black.
Black
// DarkRed represents a dark red.
DarkRed
// DarkGreen represents a dark green.
DarkGreen
// Brown represents a brown.
Brown
// DarkBlue represents a dark blue.
DarkBlue
// Purple represents a purple.
Purple
// Cyan represents a cyan.
Cyan
// LightGray represents a light gray.
LightGray
// High intensity
// DarkGray represents a dark gray.
DarkGray
// Red represents a red.
Red
// Green represents a green.
Green
// Yellow represents a yellow.
Yellow
// Blue represents a blue.
Blue
// Fuchsia represents a fuchsia.
Fuchsia
// Turquoise represents a turquoise.
Turquoise
// White represents a white.
White
)
// ConsoleWriter is an interface to abstract output layer.
type ConsoleWriter interface {
/* Write */
// WriteRaw to write raw byte array.
WriteRaw(data []byte)
// Write to write safety byte array by removing control sequences.
Write(data []byte)
// WriteStr to write raw string.
WriteRawStr(data string)
// WriteStr to write safety string by removing control sequences.
WriteStr(data string)
// Flush to flush buffer.
Flush() error
/* Erasing */
// EraseScreen erases the screen with the background colour and moves the cursor to home.
EraseScreen()
// EraseUp erases the screen from the current line up to the top of the screen.
EraseUp()
// EraseDown erases the screen from the current line down to the bottom of the screen.
EraseDown()
// EraseStartOfLine erases from the current cursor position to the start of the current line.
EraseStartOfLine()
// EraseEndOfLine erases from the current cursor position to the end of the current line.
EraseEndOfLine()
// EraseLine erases the entire current line.
EraseLine()
/* Cursor */
// ShowCursor stops blinking cursor and show.
ShowCursor()
// HideCursor hides cursor.
HideCursor()
// CursorGoTo sets the cursor position where subsequent text will begin.
CursorGoTo(row, col int)
// CursorUp moves the cursor up by 'n' rows; the default count is 1.
CursorUp(n int)
// CursorDown moves the cursor down by 'n' rows; the default count is 1.
CursorDown(n int)
// CursorForward moves the cursor forward by 'n' columns; the default count is 1.
CursorForward(n int)
// CursorBackward moves the cursor backward by 'n' columns; the default count is 1.
CursorBackward(n int)
// AskForCPR asks for a cursor position report (CPR).
AskForCPR()
// SaveCursor saves current cursor position.
SaveCursor()
// UnSaveCursor restores cursor position after a Save Cursor.
UnSaveCursor()
/* Scrolling */
// ScrollDown scrolls display down one line.
ScrollDown()
// ScrollUp scroll display up one line.
ScrollUp()
/* Title */
// SetTitle sets a title of terminal window.
SetTitle(title string)
// ClearTitle clears a title of terminal window.
ClearTitle()
/* Font */
// SetColor sets text and background colors. and specify whether text is bold.
SetColor(fg, bg Color, bold bool)
}
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