Add poll interval and setter

clipboard.go

@@ -61,13 +61,15 @@ import (
 	"fmt"
 	"os"
 	"sync"
+	"time"
 )
 
 var (
 	// activate only for running tests.
 	debug          = false
 	errUnavailable = errors.New("clipboard unavailable")
 	errUnsupported = errors.New("unsupported format")
+	poll_interval  = time.Second
 )
 
 // Format represents the format of clipboard data.
@@ -109,6 +111,13 @@ func Init() error {
 	return initError
 }
 
+// Sets the time between checking for clipboard updates
+// in the Watch function and for Write's changed channel (on some platforms)
+// the interval is by default 1 second
+func SetPollingInterval(interval time.Duration) {
+	poll_interval = interval
+}
+
 // Read returns a chunk of bytes of the clipboard data if it presents
 // in the desired format t presents. Otherwise, it returns nil.
 func Read(t Format) []byte {

clipboard_android.go

@@ -78,7 +78,7 @@ func write(t Format, buf []byte) (<-chan struct{}, error) {
 
 func watch(ctx context.Context, t Format) <-chan []byte {
 	recv := make(chan []byte, 1)
-	ti := time.NewTicker(time.Second)
+	ti := time.NewTicker(poll_interval)
 	last := Read(t)
 	go func() {
 		for {

clipboard_darwin.go

@@ -82,7 +82,7 @@ func write(t Format, buf []byte) (<-chan struct{}, error) {
 	go func() {
 		for {
 			// not sure if we are too slow or the user too fast :)
-			time.Sleep(time.Second)
+			time.Sleep(poll_interval)
 			cur := C.long(C.clipboard_change_count())
 			if cnt != cur {
 				changed <- struct{}{}
@@ -97,7 +97,7 @@ func write(t Format, buf []byte) (<-chan struct{}, error) {
 func watch(ctx context.Context, t Format) <-chan []byte {
 	recv := make(chan []byte, 1)
 	// not sure if we are too slow or the user too fast :)
-	ti := time.NewTicker(time.Second)
+	ti := time.NewTicker(poll_interval)
 	lastCount := C.long(C.clipboard_change_count())
 	go func() {
 		for {

clipboard_ios.go

@@ -56,7 +56,7 @@ func write(t Format, buf []byte) (<-chan struct{}, error) {
 
 func watch(ctx context.Context, t Format) <-chan []byte {
 	recv := make(chan []byte, 1)
-	ti := time.NewTicker(time.Second)
+	ti := time.NewTicker(poll_interval)
 	last := Read(t)
 	go func() {
 		for {

clipboard_linux.go

@@ -135,7 +135,7 @@ func write(t Format, buf []byte) (<-chan struct{}, error) {
 
 func watch(ctx context.Context, t Format) <-chan []byte {
 	recv := make(chan []byte, 1)
-	ti := time.NewTicker(time.Second)
+	ti := time.NewTicker(poll_interval)
 	last := Read(t)
 	go func() {
 		for {

clipboard_windows.go

@@ -382,7 +382,7 @@ func write(t Format, buf []byte) (<-chan struct{}, error) {
 		cnt, _, _ := getClipboardSequenceNumber.Call()
 		errch <- nil
 		for {
-			time.Sleep(time.Second)
+			time.Sleep(poll_interval)
 			cur, _, _ := getClipboardSequenceNumber.Call()
 			if cur != cnt {
 				changed <- struct{}{}
@@ -403,7 +403,7 @@ func watch(ctx context.Context, t Format) <-chan []byte {
 	ready := make(chan struct{})
 	go func() {
 		// not sure if we are too slow or the user too fast :)
-		ti := time.NewTicker(time.Second)
+		ti := time.NewTicker(poll_interval)
 		cnt, _, _ := getClipboardSequenceNumber.Call()
 		ready <- struct{}{}
 		for {