From 5310acfbf0daa566ac08f7dab9d04b62752ffc1e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miroslav=20=C5=A0ediv=C3=BD?= <sedivy.miro@gmail.com>
Date: Wed, 17 Feb 2021 21:55:11 +0100
Subject: [PATCH] implement xorg GetCursorPosition.

---
 internal/desktop/xorg.go      |  4 ++++
 internal/desktop/xorg/xorg.c  |  9 +++++++++
 internal/desktop/xorg/xorg.go | 11 +++++++++++
 internal/desktop/xorg/xorg.h  |  1 +
 internal/types/desktop.go     |  1 +
 5 files changed, 26 insertions(+)

diff --git a/internal/desktop/xorg.go b/internal/desktop/xorg.go
index ff09a5d0..df182169 100644
--- a/internal/desktop/xorg.go
+++ b/internal/desktop/xorg.go
@@ -26,6 +26,10 @@ func (manager *DesktopManagerCtx) OnCursorPosition(listener func(x, y int)) {
 	cursorListeners = append(cursorListeners, listener)
 }
 
+func (manager *DesktopManagerCtx) GetCursorPosition() (int, int) {
+	return xorg.GetCursorPosition()
+}
+
 func (manager *DesktopManagerCtx) Scroll(x, y int) {
 	xorg.Scroll(x, y)
 }
diff --git a/internal/desktop/xorg/xorg.c b/internal/desktop/xorg/xorg.c
index fd5be1f9..8d446440 100644
--- a/internal/desktop/xorg/xorg.c
+++ b/internal/desktop/xorg/xorg.c
@@ -21,6 +21,15 @@ void XMove(int x, int y) {
   XSync(display, 0);
 }
 
+void XCursorPosition(int *x, int *y) {
+  Display *display = getXDisplay();
+  Window root = DefaultRootWindow(display);
+  Window window;
+  int i;
+  unsigned mask;
+  XQueryPointer(display, root, &root, &window, x, y, &i, &i, &mask);
+}
+
 void XScroll(int x, int y) {
   int ydir = 4; /* Button 4 is up, 5 is down. */
   int xdir = 6;
diff --git a/internal/desktop/xorg/xorg.go b/internal/desktop/xorg/xorg.go
index 92f41b1e..72dc04e9 100644
--- a/internal/desktop/xorg/xorg.go
+++ b/internal/desktop/xorg/xorg.go
@@ -68,6 +68,17 @@ func Move(x, y int) {
 	C.XMove(C.int(x), C.int(y))
 }
 
+func GetCursorPosition() (int, int) {
+	mu.Lock()
+	defer mu.Unlock()
+
+	var x C.int
+	var y C.int
+	C.XCursorPosition(&x, &y)
+	
+	return int(x), int(y)
+}
+
 func Scroll(x, y int) {
 	mu.Lock()
 	defer mu.Unlock()
diff --git a/internal/desktop/xorg/xorg.h b/internal/desktop/xorg/xorg.h
index caa99fc8..8fad29c9 100644
--- a/internal/desktop/xorg/xorg.h
+++ b/internal/desktop/xorg/xorg.h
@@ -16,6 +16,7 @@ int XDisplayOpen(char *input);
 void XDisplayClose(void);
 
 void XMove(int x, int y);
+void XCursorPosition(int *x, int *y);
 void XScroll(int x, int y);
 void XButton(unsigned int button, int down);
 void XKey(unsigned long key, int down);
diff --git a/internal/types/desktop.go b/internal/types/desktop.go
index c1018115..83076e76 100644
--- a/internal/types/desktop.go
+++ b/internal/types/desktop.go
@@ -49,6 +49,7 @@ type DesktopManager interface {
 	// xorg
 	Move(x, y int)
 	OnCursorPosition(listener func(x, y int))
+	GetCursorPosition() (int, int)
 	Scroll(x, y int)
 	ButtonDown(code int) error
 	KeyDown(code uint64) error