From cb9976cb59ca9a18e972dea8f1efa33bb5c9276d Mon Sep 17 00:00:00 2001
From: bi4k8 <bi4k8@github>
Date: Sun, 6 Mar 2022 04:46:11 +0000
Subject: [PATCH] support wlr-output-power-management

Backport of https://github.com/labwc/labwc/commit/c23397f362930e97e616a75590c4111558891381
---
 include/labwc.h |  6 ++++++
 src/output.c    | 18 ++++++++++++++++++
 src/server.c    |  7 +++++++
 3 files changed, 31 insertions(+)

diff --git a/include/labwc.h b/include/labwc.h
index 0fd0f60c..83092cc8 100644
--- a/include/labwc.h
+++ b/include/labwc.h
@@ -26,6 +26,7 @@
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_output_damage.h>
 #include <wlr/types/wlr_output_management_v1.h>
+#include <wlr/types/wlr_output_power_management_v1.h>
 #include <wlr/types/wlr_output_layout.h>
 #include <wlr/types/wlr_relative_pointer_v1.h>
 #include <wlr/types/wlr_pointer.h>
@@ -171,6 +172,9 @@ struct server {
 
 	struct wlr_foreign_toplevel_manager_v1 *foreign_toplevel_manager;
 
+	struct wlr_output_power_manager_v1 *output_power_manager_v1;
+	struct wl_listener output_power_manager_set_mode;
+
 	struct wlr_relative_pointer_manager_v1 *relative_pointer_manager;
 	struct wlr_pointer_constraints_v1 *constraints;
 	struct wl_listener new_constraint;
@@ -520,6 +524,8 @@ struct output *output_from_wlr_output(struct server *server,
 	struct wlr_output *wlr_output);
 struct wlr_box output_usable_area_in_layout_coords(struct output *output);
 struct wlr_box output_usable_area_from_cursor_coords(struct server *server);
+void handle_output_power_manager_set_mode(struct wl_listener *listener,
+	void *data);
 
 void damage_all_outputs(struct server *server);
 void damage_view_whole(struct view *view);
diff --git a/src/output.c b/src/output.c
index 9c40fcd5..3267d38f 100644
--- a/src/output.c
+++ b/src/output.c
@@ -1286,3 +1286,21 @@ output_usable_area_from_cursor_coords(struct server *server)
 	struct output *output = output_from_wlr_output(server, wlr_output);
 	return output_usable_area_in_layout_coords(output);
 }
+
+void
+handle_output_power_manager_set_mode(struct wl_listener *listener, void *data)
+{
+	struct wlr_output_power_v1_set_mode_event *event = data;
+
+	switch (event->mode) {
+	case ZWLR_OUTPUT_POWER_V1_MODE_OFF:
+		wlr_output_enable(event->output, false);
+		wlr_output_commit(event->output);
+		break;
+	case ZWLR_OUTPUT_POWER_V1_MODE_ON:
+		wlr_output_enable(event->output, true);
+		output_ensure_buffer(event->output);
+		wlr_output_commit(event->output);
+		break;
+	}
+}
diff --git a/src/server.c b/src/server.c
index 450b71e8..24c0bbab 100644
--- a/src/server.c
+++ b/src/server.c
@@ -317,6 +317,13 @@ server_init(struct server *server)
 	server->foreign_toplevel_manager =
 		wlr_foreign_toplevel_manager_v1_create(server->wl_display);
 
+	server->output_power_manager_v1 =
+		wlr_output_power_manager_v1_create(server->wl_display);
+	server->output_power_manager_set_mode.notify =
+		handle_output_power_manager_set_mode;
+	wl_signal_add(&server->output_power_manager_v1->events.set_mode,
+		&server->output_power_manager_set_mode);
+
 	layers_init(server);
 
 #if HAVE_XWAYLAND