emu

type Cell struct {
	geom.Vec2
	Glyph
}

type ChangeFlag uint32

type Color uint32

type Cursor struct {
	Attr  Glyph
	X, Y  int
	State uint8
	Style CursorStyle
}

type CursorStyle int

type Dirty struct {
	Lines map[int]bool // line dirtiness
	// the most recent cell that was `setChar`'d
	Print   Cell
	Printed bool

	Scroll   Scroll
	Scrolled bool

	Clear   geom.Rect
	Cleared bool

	Flag ChangeFlag
}

type Glyph struct {
	Char        rune
	Mode        int16
	FG, BG      Color
	Transparent bool
}

type Line []Glyph

type ModeFlag uint32

type Scroll struct {
	Up            bool
	Origin, Count int
}

type State struct {
	deadlock.RWMutex
	DebugLogger *log.Logger
	// contains filtered or unexported fields
}

type Terminal interface {
	// View displays the virtual terminal.
	View

	// Parse parses input and writes terminal changes to state.
	Parse(p []byte) (n int, err error)

	// Write does the same as Parse, but locks first.
	io.Writer
}

type TerminalInfo struct {
	// contains filtered or unexported fields
}

type TerminalOption func(*TerminalInfo)

type View interface {
	// String dumps the virtual terminal contents.
	fmt.Stringer

	// Size returns the size of the virtual terminal.
	Size() (cols, rows int)

	// Resize changes the size of the virtual terminal.
	Resize(cols, rows int)

	// Mode returns the current terminal mode.
	Mode() ModeFlag

	// Title represents the title of the console window.
	Title() string

	// Cell returns the glyph containing the character code, foreground color, and
	// background color at position (x, y) relative to the top left of the terminal.
	Cell(x, y int) Glyph

	// Cursor returns the current position of the cursor.
	Cursor() Cursor

	// CursorVisible returns the visible state of the cursor.
	CursorVisible() bool

	// Screen gets all of the lines on the screen.
	Screen() []Line

	// History returns the scrollback buffer.
	History() []Line

	// ToggleHistory allows you to enable and disable saving lines to the
	// scrollback buffer.
	EnableHistory(enabled bool)

	Changes() *Dirty
}