From 590bedf604ccc05cb9e41c3fc15d93ff827e7f65 Mon Sep 17 00:00:00 2001
From: William Wold <wm@wmww.sh>
Date: Mon, 14 Sep 2020 02:38:48 -0700
Subject: Implement placement on Wayland

---
 src/daemon/daemon.c  | 13 -------------
 src/daemon/engines.c | 17 +++++++++++++++++
 src/daemon/wayland.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 src/daemon/wayland.h |  1 +
 4 files changed, 60 insertions(+), 13 deletions(-)

diff --git a/src/daemon/daemon.c b/src/daemon/daemon.c
index 7981bb0..c42b2e6 100644
--- a/src/daemon/daemon.c
+++ b/src/daemon/daemon.c
@@ -45,11 +45,6 @@
 #include <libwnck/libwnck.h>
 #endif // HAVE_X11
 
-#ifdef HAVE_WAYLAND
-#include <gdk/gdkwayland.h>
-#include "wayland.h"
-#endif // HAVE_WAYLAND
-
 #include "daemon.h"
 #include "engines.h"
 #include "stack.h"
@@ -1374,14 +1369,6 @@ static gboolean notify_daemon_notify_handler(NotifyDaemonNotifications *object,
 	{
 		nw = theme_create_notification (url_clicked_cb);
 		g_object_set_data (G_OBJECT (nw), "_notify_daemon", daemon);
-
-#if HAVE_WAYLAND
-		if (GDK_IS_WAYLAND_DISPLAY (gdk_display_get_default ()))
-		{
-			wayland_init_notification (nw);
-		}
-#endif // HAVE_WAYLAND
-
 		gtk_widget_realize (GTK_WIDGET (nw));
 		new_notification = TRUE;
 
diff --git a/src/daemon/engines.c b/src/daemon/engines.c
index db50e8b..3a0334e 100644
--- a/src/daemon/engines.c
+++ b/src/daemon/engines.c
@@ -26,6 +26,11 @@
 #include "daemon.h"
 #include "engines.h"
 
+#ifdef HAVE_WAYLAND
+#include <gdk/gdkwayland.h>
+#include "wayland.h"
+#endif // HAVE_WAYLAND
+
 typedef struct {
 	GModule*    module;
 	guint       ref_count;
@@ -206,6 +211,12 @@ GtkWindow* theme_create_notification(UrlClickedCb url_clicked_cb)
 	GtkWindow* nw = engine->create_notification(url_clicked_cb);
 	g_object_set_data_full(G_OBJECT(nw), "_theme_engine", engine, (GDestroyNotify) theme_engine_unref);
 	engine->ref_count++;
+#if HAVE_WAYLAND
+	if (GDK_IS_WAYLAND_DISPLAY (gdk_display_get_default ()))
+	{
+		wayland_init_notification (nw);
+	}
+#endif // HAVE_WAYLAND
 	return nw;
 }
 
@@ -313,6 +324,12 @@ void theme_clear_notification_actions(GtkWindow* nw)
 
 void theme_move_notification(GtkWindow* nw, int x, int y)
 {
+#if HAVE_WAYLAND
+	if (GDK_IS_WAYLAND_DISPLAY (gdk_display_get_default ()))
+	{
+		wayland_move_notification (nw, x, y);
+	}
+#endif // HAVE_WAYLAND
 	ThemeEngine* engine = g_object_get_data(G_OBJECT(nw), "_theme_engine");
 	engine->move_notification(nw, x, y);
 }
diff --git a/src/daemon/wayland.c b/src/daemon/wayland.c
index 837e8a2..dbf1f30 100644
--- a/src/daemon/wayland.c
+++ b/src/daemon/wayland.c
@@ -37,3 +37,45 @@ void wayland_init_notification (GtkWindow* nw)
 {
 	gtk_layer_init_for_window (nw);
 }
+
+void wayland_move_notification (GtkWindow* nw, int x, int y)
+{
+	GdkWindow *window = gtk_widget_get_window (GTK_WIDGET (nw));
+	GdkMonitor *monitor = gdk_display_get_monitor_at_window (
+		gdk_window_get_display (window),
+		window);
+	GdkRectangle workarea;
+	gdk_monitor_get_workarea (monitor, &workarea);
+	GtkRequisition  req;
+	gtk_widget_get_preferred_size (GTK_WIDGET (nw), NULL, &req);
+	int left_gap = x;
+	int top_gap = y;
+	int right_gap = workarea.width - x - req.width;
+	int bottom_gap = workarea.height - y - req.height;
+
+	if (left_gap < right_gap)
+	{
+		gtk_layer_set_anchor (nw, GTK_LAYER_SHELL_EDGE_LEFT, TRUE);
+		gtk_layer_set_anchor (nw, GTK_LAYER_SHELL_EDGE_RIGHT, FALSE);
+		gtk_layer_set_margin (nw, GTK_LAYER_SHELL_EDGE_LEFT, left_gap);
+	}
+	else
+	{
+		gtk_layer_set_anchor (nw, GTK_LAYER_SHELL_EDGE_LEFT, FALSE);
+		gtk_layer_set_anchor (nw, GTK_LAYER_SHELL_EDGE_RIGHT, TRUE);
+		gtk_layer_set_margin (nw, GTK_LAYER_SHELL_EDGE_RIGHT, right_gap);
+	}
+
+	if (top_gap < bottom_gap)
+	{
+		gtk_layer_set_anchor (nw, GTK_LAYER_SHELL_EDGE_TOP, TRUE);
+		gtk_layer_set_anchor (nw, GTK_LAYER_SHELL_EDGE_BOTTOM, FALSE);
+		gtk_layer_set_margin (nw, GTK_LAYER_SHELL_EDGE_TOP, top_gap);
+	}
+	else
+	{
+		gtk_layer_set_anchor (nw, GTK_LAYER_SHELL_EDGE_TOP, FALSE);
+		gtk_layer_set_anchor (nw, GTK_LAYER_SHELL_EDGE_BOTTOM, TRUE);
+		gtk_layer_set_margin (nw, GTK_LAYER_SHELL_EDGE_BOTTOM, bottom_gap);
+	}
+}
diff --git a/src/daemon/wayland.h b/src/daemon/wayland.h
index 816eb74..5a58ec9 100644
--- a/src/daemon/wayland.h
+++ b/src/daemon/wayland.h
@@ -30,5 +30,6 @@
 #include <gtk/gtk.h>
 
 void wayland_init_notification (GtkWindow* nw);
+void wayland_move_notification (GtkWindow* nw, int x, int y);
 
 #endif /* _WAYLAND_H */
-- 
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