From 5081d49f9f08596c07a8ed32430a4fa3e1baf352 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Wed, 24 Jul 2019 23:46:17 +0200
Subject: Add puglHasFocus()

---
 pugl/detail/mac.m | 9 +++++++++
 pugl/detail/win.c | 8 +++++++-
 pugl/detail/x11.c | 9 +++++++++
 pugl/pugl.h       | 6 ++++++
 4 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/pugl/detail/mac.m b/pugl/detail/mac.m
index a438701..385070d 100644
--- a/pugl/detail/mac.m
+++ b/pugl/detail/mac.m
@@ -778,6 +778,15 @@ puglGrabFocus(PuglView* view)
 	[window makeFirstResponder:view->impl->wrapperView];
 }
 
+bool
+puglHasFocus(const PuglView* view)
+{
+	PuglInternals* const impl = view->impl;
+
+	return ([[impl->wrapperView window] isKeyWindow] &&
+	        [[impl->wrapperView window] firstResponder] == impl->wrapperView);
+}
+
 void
 puglRequestAttention(PuglView* view)
 {
diff --git a/pugl/detail/win.c b/pugl/detail/win.c
index 42b9427..a4597b5 100644
--- a/pugl/detail/win.c
+++ b/pugl/detail/win.c
@@ -631,10 +631,16 @@ puglGrabFocus(PuglView* view)
 	SetFocus(view->impl->hwnd);
 }
 
+bool
+puglHasFocus(const PuglView* view)
+{
+	return GetFocus() == view->impl->hwnd;
+}
+
 void
 puglRequestAttention(PuglView* view)
 {
-	if (!view->impl->mouseTracked || GetFocus() != view->impl->hwnd) {
+	if (!view->impl->mouseTracked || !puglHasFocus(view)) {
 		FlashWindow(view->impl->hwnd, TRUE);
 		SetTimer(view->impl->hwnd, PUGL_URGENT_TIMER_ID, 500, NULL);
 		view->impl->flashing = true;
diff --git a/pugl/detail/x11.c b/pugl/detail/x11.c
index a766ace..cb9f0e2 100644
--- a/pugl/detail/x11.c
+++ b/pugl/detail/x11.c
@@ -443,6 +443,15 @@ puglGrabFocus(PuglView* view)
 		view->impl->display, view->impl->win, RevertToNone, CurrentTime);
 }
 
+bool
+puglHasFocus(const PuglView* view)
+{
+	int    revertTo      = 0;
+	Window focusedWindow = 0;
+	XGetInputFocus(view->impl->display, &focusedWindow, &revertTo);
+	return focusedWindow == view->impl->win;
+}
+
 void
 puglRequestAttention(PuglView* view)
 {
diff --git a/pugl/pugl.h b/pugl/pugl.h
index f352766..b176696 100644
--- a/pugl/pugl.h
+++ b/pugl/pugl.h
@@ -640,6 +640,12 @@ puglSetEventFunc(PuglView* view, PuglEventFunc eventFunc);
 PUGL_API PUGL_DEPRECATED_BY("puglInitWindowHint") void
 puglIgnoreKeyRepeat(PuglView* view, bool ignore);
 
+/**
+   Return true iff `view` has the input focus.
+*/
+PUGL_API bool
+puglHasFocus(const PuglView* view);
+
 /**
    Grab the input focus.
 */
-- 
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