From 0c8a64942e087038806b353949c900e03fd764a8 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Wed, 28 Mar 2018 15:47:22 -0400
Subject: Add initial layer shell skeleton

---
 sway/desktop/layer_shell.c | 96 ++++++++++++++++++++++++++++++++++++++++++++++
 sway/desktop/output.c      |  6 +++
 2 files changed, 102 insertions(+)
 create mode 100644 sway/desktop/layer_shell.c

(limited to 'sway/desktop')

diff --git a/sway/desktop/layer_shell.c b/sway/desktop/layer_shell.c
new file mode 100644
index 00000000..3cf171bd
--- /dev/null
+++ b/sway/desktop/layer_shell.c
@@ -0,0 +1,96 @@
+#include <stdlib.h>
+#include <wayland-server.h>
+#include <wlr/util/log.h>
+#include "sway/layers.h"
+#include "sway/output.h"
+#include "sway/server.h"
+
+static void arrange_layers(struct sway_output *output) {
+	// TODO
+}
+
+static void handle_output_destroy(struct wl_listener *listener, void *data) {
+	// TODO
+}
+
+static void handle_output_mode(struct wl_listener *listener, void *data) {
+	// TODO
+}
+
+static void handle_output_transform(struct wl_listener *listener, void *data) {
+	// TODO
+}
+
+static void handle_surface_commit(struct wl_listener *listener, void *data) {
+	// TODO
+}
+
+static void handle_destroy(struct wl_listener *listener, void *data) {
+	// TODO
+}
+
+static void handle_map(struct wl_listener *listener, void *data) {
+	// TODO
+}
+
+static void handle_unmap(struct wl_listener *listener, void *data) {
+	// TODO
+}
+
+void handle_layer_shell_surface(struct wl_listener *listener, void *data) {
+	struct wlr_layer_surface *layer_surface = data;
+	struct sway_server *server =
+		wl_container_of(listener, server, layer_shell_surface);
+	wlr_log(L_DEBUG, "new layer surface: namespace %s layer %d anchor %d "
+			"size %dx%d margin %d,%d,%d,%d",
+		layer_surface->namespace, layer_surface->layer, layer_surface->layer,
+		layer_surface->client_pending.desired_width,
+		layer_surface->client_pending.desired_height,
+		layer_surface->client_pending.margin.top,
+		layer_surface->client_pending.margin.right,
+		layer_surface->client_pending.margin.bottom,
+		layer_surface->client_pending.margin.left);
+
+	struct sway_layer_surface *sway_layer =
+		calloc(1, sizeof(struct sway_layer_surface));
+	if (!sway_layer) {
+		return;
+	}
+
+	sway_layer->surface_commit.notify = handle_surface_commit;
+	wl_signal_add(&layer_surface->surface->events.commit,
+		&sway_layer->surface_commit);
+
+	sway_layer->output_destroy.notify = handle_output_destroy;
+	wl_signal_add(&layer_surface->output->events.destroy,
+		&sway_layer->output_destroy);
+
+	sway_layer->output_mode.notify = handle_output_mode;
+	wl_signal_add(&layer_surface->output->events.mode,
+		&sway_layer->output_mode);
+
+	sway_layer->output_transform.notify = handle_output_transform;
+	wl_signal_add(&layer_surface->output->events.transform,
+		&sway_layer->output_transform);
+
+	sway_layer->destroy.notify = handle_destroy;
+	wl_signal_add(&layer_surface->events.destroy, &sway_layer->destroy);
+	sway_layer->map.notify = handle_map;
+	wl_signal_add(&layer_surface->events.map, &sway_layer->map);
+	sway_layer->unmap.notify = handle_unmap;
+	wl_signal_add(&layer_surface->events.unmap, &sway_layer->unmap);
+	// TODO: Listen for subsurfaces
+
+	sway_layer->layer_surface = layer_surface;
+	layer_surface->data = sway_layer;
+
+	struct sway_output *output = layer_surface->output->data;
+	wl_list_insert(&output->layers[layer_surface->layer], &sway_layer->link);
+
+	// Temporarily set the layer's current state to client_pending
+	// So that we can easily arrange it
+	struct wlr_layer_surface_state old_state = layer_surface->current;
+	layer_surface->current = layer_surface->client_pending;
+	arrange_layers(output);
+	layer_surface->current = old_state;
+}
diff --git a/sway/desktop/output.c b/sway/desktop/output.c
index 6c990c47..a9aa47a6 100644
--- a/sway/desktop/output.c
+++ b/sway/desktop/output.c
@@ -236,6 +236,7 @@ void handle_new_output(struct wl_listener *listener, void *data) {
 		return;
 	}
 	output->wlr_output = wlr_output;
+	wlr_output->data = output;
 	output->server = server;
 
 	if (!wl_list_empty(&wlr_output->modes)) {
@@ -250,6 +251,11 @@ void handle_new_output(struct wl_listener *listener, void *data) {
 		return;
 	}
 
+	size_t len = sizeof(output->layers) / sizeof(output->layers[0]);
+	for (size_t i = 0; i < len; ++i) {
+		wl_list_init(&output->layers[i]);
+	}
+
 	sway_input_manager_configure_xcursor(input_manager);
 
 	wl_signal_add(&wlr_output->events.frame, &output->frame);
-- 
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