Fix a bug when using OptionWriter

_tools/complete_file/main.go

@@ -9,20 +9,33 @@ import (
 	"github.com/c-bata/go-prompt/completer"
 )
 
-func executor(in string) {
+var filePathCompleter = completer.FilePathCompleter{
-	fmt.Println("Your input: " + in)
-}
-
-func main() {
-	c := completer.FilePathCompleter{
 	IgnoreCase: true,
 	Filter: func(fi os.FileInfo) bool {
 		return fi.IsDir() || strings.HasSuffix(fi.Name(), ".go")
 	},
+}
+
+func executor(in string) {
+	fmt.Println("Your input: " + in)
+}
+
+func completerFunc(d prompt.Document) []prompt.Suggest {
+	t := d.GetWordBeforeCursor()
+	if strings.HasPrefix(t, "--") {
+		return []prompt.Suggest{
+			{"--foo", ""},
+			{"--bar", ""},
+			{"--baz", ""},
 		}
+	}
+	return filePathCompleter.Complete(d)
+}
+
+func main() {
 	p := prompt.New(
 		executor,
-		c.Complete,
+		completerFunc,
 		prompt.OptionPrefix(">>> "),
 		prompt.OptionCompletionWordSeparator(completer.FilePathCompletionSeparator),
 	)

_tools/sigwinch2/main.go

@@ -0,0 +1,49 @@
+// +build windows
+
+package main
+
+import (
+	"fmt"
+	"syscall"
+	"unsafe"
+
+	"github.com/mattn/go-tty"
+)
+
+const maxReadByteLen = 1024
+
+var kernel32 = syscall.NewLazyDLL("kernel32.dll")
+
+var procGetNumberOfConsoleInputEvents = kernel32.NewProc("GetNumberOfConsoleInputEvents")
+
+func main() {
+	t, err := tty.Open()
+	if err != nil {
+		return
+	}
+	sigwinch := t.SIGWINCH()
+
+	go func() {
+		for {
+			select {
+			default:
+				var ev uint32
+				r0, _, err := procGetNumberOfConsoleInputEvents.Call(t.Input().Fd(), uintptr(unsafe.Pointer(&ev)))
+				if r0 == 0 {
+					fmt.Println(err)
+					return
+				}
+				if ev == 0 {
+					fmt.Println("EAGAIN")
+				}
+				t.ReadRune()
+			}
+			t.ReadRune()
+		}
+	}()
+
+	for {
+		ws := <-sigwinch
+		fmt.Printf("Row %d : Col %d\n", ws.H, ws.W)
+	}
+}

emacs.go

@@ -110,10 +110,9 @@ var emacsKeyBindings = []KeyBind{
 	{
 		Key: ControlL,
 		Fn: func(buf *Buffer) {
-			out := NewStandardOutputWriter()
+			consoleWriter.EraseScreen()
-			out.EraseScreen()
+			consoleWriter.CursorGoTo(0, 0)
-			out.CursorGoTo(0, 0)
+			consoleWriter.Flush()
-			out.Flush()
 		},
 	},
 }

option.go

@@ -15,6 +15,7 @@ func OptionParser(x ConsoleParser) Option {
 // OptionWriter to set a custom ConsoleWriter object. An argument should implement ConsoleWriter interface.
 func OptionWriter(x ConsoleWriter) Option {
 	return func(p *Prompt) error {
+		RegisterConsoleWriter(x)
 		p.renderer.out = x
 		return nil
 	}
@@ -227,11 +228,14 @@ func OptionAddASCIICodeBind(b ...ASCIICodeBind) Option {
 
 // New returns a Prompt with powerful auto-completion.
 func New(executor Executor, completer Completer, opts ...Option) *Prompt {
+	defaultWriter := NewStandardOutputWriter()
+	RegisterConsoleWriter(defaultWriter)
+
 	pt := &Prompt{
 		in: NewStandardInputParser(),
 		renderer: &Render{
 			prefix:                       "> ",
-			out:                          NewStandardOutputWriter(),
+			out:                          defaultWriter,
 			livePrefixCallback:           func() (string, bool) { return "", false },
 			prefixTextColor:              Blue,
 			prefixBGColor:                DefaultColor,

output.go

@@ -1,5 +1,18 @@
 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
 

output_posix.go

@@ -45,7 +45,7 @@ var _ ConsoleWriter = &PosixWriter{}
 // NewStandardOutputWriter returns ConsoleWriter object to write to stdout.
 // This generates VT100 escape sequences because almost terminal emulators
 // in POSIX OS built on top of a VT100 specification.
-func NewStandardOutputWriter() *PosixWriter {
+func NewStandardOutputWriter() ConsoleWriter {
 	return &PosixWriter{
 		fd: syscall.Stdout,
 	}

output_windows.go

@@ -29,7 +29,7 @@ var _ ConsoleWriter = &WindowsWriter{}
 
 // NewStandardOutputWriter returns ConsoleWriter object to write to stdout.
 // This generates win32 control sequences.
-func NewStandardOutputWriter() *WindowsWriter {
+func NewStandardOutputWriter() ConsoleWriter {
 	return &WindowsWriter{
 		out: colorable.NewColorableStdout(),
 	}