Add debug tree view

1 files changed, 110 insertions, 0 deletions

diff --git a/sway/debug-tree.c b/sway/debug-tree.c
new file mode 100644
index 00000000..08ee3585
--- /dev/null
+++ b/sway/debug-tree.c
@@ -0,0 +1,110 @@
+#include <pango/pangocairo.h>
+#include <wlr/backend.h>
+#include <wlr/render/wlr_texture.h>
+#include <wlr/util/log.h>
+#include "config.h"
+#include "sway/input/input-manager.h"
+#include "sway/input/seat.h"
+#include "sway/server.h"
+#include "sway/tree/container.h"
+#include "sway/tree/layout.h"
+#include "cairo.h"
+#include "config.h"
+#include "pango.h"
+
+static const char *layout_to_str(enum sway_container_layout layout) {
+	switch (layout) {
+	case L_HORIZ:
+		return "L_HORIZ";
+	case L_VERT:
+		return "L_VERT";
+	case L_STACKED:
+		return "L_STACKED";
+	case L_TABBED:
+		return "L_TABBED";
+	case L_FLOATING:
+		return "L_FLOATING";
+	case L_NONE:
+	default:
+		return "L_NONE";
+	}
+}
+
+static int draw_container(cairo_t *cairo, struct sway_container *container,
+		struct sway_container *focus, int x, int y) {
+	int text_width, text_height;
+	get_text_size(cairo, "monospace", &text_width, &text_height,
+		1, false, "%s '%s' %s %dx%d@%d,%d",
+		container_type_to_str(container->type), container->name,
+		layout_to_str(container->layout),
+		container->width, container->height, container->x, container->y);
+	cairo_rectangle(cairo, x, y, text_width, text_height);
+	cairo_set_source_u32(cairo, 0xFFFFFFFF);
+	cairo_fill(cairo);
+	cairo_move_to(cairo, x, y);
+	if (focus == container) {
+		cairo_set_source_u32(cairo, 0xFF0000FF);
+	} else {
+		cairo_set_source_u32(cairo, 0x000000FF);
+	}
+	pango_printf(cairo, "monospace", 1, false, "%s '%s' %s %dx%d@%d,%d",
+		container_type_to_str(container->type), container->name,
+		layout_to_str(container->layout),
+		container->width, container->height, container->x, container->y);
+	int height = text_height;
+	if (container->children) {
+		for (int i = 0; i < container->children->length; ++i) {
+			struct sway_container *child = container->children->items[i];
+			height += draw_container(cairo, child, focus, x + 10, y + height);
+		}
+	}
+	return height;
+}
+
+bool enable_debug_tree = false;
+
+void update_debug_tree() {
+	if (!enable_debug_tree) {
+		return;
+	}
+
+	int width = 640, height = 480;
+	for (int i = 0; i < root_container.children->length; ++i) {
+		struct sway_container *container = root_container.children->items[i];
+		if (container->width > width) {
+			width = container->width;
+		}
+		if (container->height > height) {
+			height = container->height;
+		}
+	}
+	cairo_surface_t *surface =
+		cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
+	cairo_t *cairo = cairo_create(surface);
+	PangoContext *pango = pango_cairo_create_context(cairo);
+
+	struct sway_seat *seat = NULL;
+	wl_list_for_each(seat, &input_manager->seats, link) {
+		break;
+	}
+
+	struct sway_container *focus;
+	if (seat != NULL) {
+		focus = seat_get_focus(seat);
+	}
+	draw_container(cairo, &root_container, focus, 0, 0);
+
+	cairo_surface_flush(surface);
+	struct wlr_renderer *renderer = wlr_backend_get_renderer(server.backend);
+	if (root_container.sway_root->debug_tree) {
+		wlr_texture_destroy(root_container.sway_root->debug_tree);
+	}
+	unsigned char *data = cairo_image_surface_get_data(surface);
+	int stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, width);
+	struct wlr_texture *texture = wlr_texture_from_pixels(renderer,
+		WL_SHM_FORMAT_ARGB8888, stride, width, height, data);
+	root_container.sway_root->debug_tree = texture;
+	cairo_surface_destroy(surface);
+	g_object_unref(pango);
+	cairo_destroy(cairo);
+}