From fdd6f63cb696cc5796ee167c93266de350620ae4 Mon Sep 17 00:00:00 2001
From: Benjamin Dahlmanns <bendahl@users.noreply.github.com>
Date: Fri, 30 Mar 2018 13:42:46 +0200
Subject: [PATCH] Add press and release functions to touch pad device

---
 uinput.go      | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++
 uinput_test.go | 20 +++++++++++++++
 2 files changed, 87 insertions(+)

diff --git a/uinput.go b/uinput.go
index 17574b4..2c341d0 100644
--- a/uinput.go
+++ b/uinput.go
@@ -162,6 +162,20 @@ type TouchPad interface {
 	// RightClick will issue a right click.
 	RightClick() error
 
+	// LeftPress will simulate a press of the left mouse button. Note that the button will not be released until
+	// LeftRelease is invoked.
+	LeftPress() error
+
+	// LeftRelease will simulate the release of the left mouse button.
+	LeftRelease() error
+
+	// RightPress will simulate the press of the right mouse button. Note that the button will not be released until
+	// RightRelease is invoked.
+	RightPress() error
+
+	// RightRelease will simulate the release of the right mouse button.
+	RightRelease() error
+
 	io.Closer
 }
 
@@ -227,6 +241,59 @@ func (vTouch vTouchPad) RightClick() error {
 	}
 	return nil
 }
+// LeftPress will simulate a press of the left mouse button. Note that the button will not be released until
+// LeftRelease is invoked.
+func (vTouch vTouchPad) LeftPress() error {
+	err := sendBtnEvent(vTouch.deviceFile, evBtnLeft, btnStatePressed)
+	if err != nil {
+		return fmt.Errorf("Failed press the left mouse button: %v", err)
+	}
+	err = syncEvents(vTouch.deviceFile)
+	if err != nil {
+		return fmt.Errorf("sync to device file failed: %v", err)
+	}
+	return nil
+}
+
+// LeftRelease will simulate the release of the left mouse button.
+func (vTouch vTouchPad) LeftRelease() error {
+	err := sendBtnEvent(vTouch.deviceFile, evBtnLeft, btnStateReleased)
+	if err != nil {
+		return fmt.Errorf("Failed to release the left mouse button: %v", err)
+	}
+	err = syncEvents(vTouch.deviceFile)
+	if err != nil {
+		return fmt.Errorf("sync to device file failed: %v", err)
+	}
+	return nil
+}
+
+// RightPress will simulate the press of the right mouse button. Note that the button will not be released until
+// RightRelease is invoked.
+func (vRel vTouchPad) RightPress() error {
+	err := sendBtnEvent(vRel.deviceFile, evBtnRight, btnStatePressed)
+	if err != nil {
+		return fmt.Errorf("Failed to press the right mouse button: %v", err)
+	}
+	err = syncEvents(vRel.deviceFile)
+	if err != nil {
+		return fmt.Errorf("sync to device file failed: %v", err)
+	}
+	return nil
+}
+
+// RightRelease will simulate the release of the right mouse button.
+func (vTouch vTouchPad) RightRelease() error {
+	err := sendBtnEvent(vTouch.deviceFile, evBtnRight, btnStateReleased)
+	if err != nil {
+		return fmt.Errorf("Failed to release the right mouse button: %v", err)
+	}
+	err = syncEvents(vTouch.deviceFile)
+	if err != nil {
+		return fmt.Errorf("sync to device file failed: %v", err)
+	}
+	return nil
+}
 
 func (vTouch vTouchPad) Close() error {
 	return closeDevice(vTouch.deviceFile)
diff --git a/uinput_test.go b/uinput_test.go
index de37d9e..527224f 100644
--- a/uinput_test.go
+++ b/uinput_test.go
@@ -132,6 +132,26 @@ func TestBasicTouchPadMoves(t *testing.T) {
 		t.Fatalf("Failed to perform right click. Last error was: %s\n", err)
 	}
 
+	err = absDev.LeftPress()
+	if err != nil {
+		t.Fatalf("Failed to perform left key press. Last error was: %s\n", err)
+	}
+
+	err = absDev.LeftRelease()
+	if err != nil {
+		t.Fatalf("Failed to perform left key release. Last error was: %s\n", err)
+	}
+
+	err = absDev.RightPress()
+	if err != nil {
+		t.Fatalf("Failed to perform right key press. Last error was: %s\n", err)
+	}
+
+	err = absDev.RightRelease()
+	if err != nil {
+		t.Fatalf("Failed to perform right key release. Last error was: %s\n", err)
+	}
+
 	err = absDev.Close()
 	if err != nil {
 		t.Fatalf("Failed to close device. Last error was: %s\n", err)