Add outputs to the tree

sway/tree/container.c

@@ -0,0 +1,45 @@
+#define _POSIX_C_SOURCE 200809L
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include "sway/container.h"
+#include "sway/layout.h"
+#include "sway/output.h"
+
+static swayc_t *new_swayc(enum swayc_types type) {
+	// next id starts at 1 because 0 is assigned to root_container in layout.c
+	static size_t next_id = 1;
+	swayc_t *c = calloc(1, sizeof(swayc_t));
+	if (!c) {
+		return NULL;
+	}
+	c->id = next_id++;
+	c->layout = L_NONE;
+	c->workspace_layout = L_NONE;
+	c->type = type;
+	c->nb_master = 1;
+	c->nb_slave_groups = 1;
+	if (type != C_VIEW) {
+		c->children = create_list();
+	}
+	return c;
+}
+
+swayc_t *new_output(struct sway_output *sway_output) {
+	struct wlr_box size;
+	wlr_output_effective_resolution(sway_output->wlr_output,
+			&size.width, &size.height);
+	const char *name = sway_output->wlr_output->name;
+
+	swayc_t *output = new_swayc(C_OUTPUT);
+	output->sway_output = sway_output;
+	output->name = name ? strdup(name) : NULL;
+	output->width = size.width;
+	output->height = size.width;
+
+	add_child(&root_container, output);
+
+	// TODO: Create workspace
+
+	return output;
+}