commit d98c7e86fb75bfa12ace99cfe25048f49851a90b
author Marius Vlad <marius.vlad@collabora.com> Mon Mar 08 18:02:32 2021 +0200
committer Marius Vlad <marius.vlad@collabora.com> Tue Nov 02 19:29:50 2021 +0200
tree 9a8396afcc75ee5a05703ab85257cb2fc35c2cf4
parent d6ccc8b025c94bb379c86290a146b17e0879fed4

shared/shell-utils: Create common helpers functions for shells

Group common functions found in both kiosk-shell and deskop-shell to
a shared utils file.

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>

shared/shell-utils.c

diff --git a/shared/shell-utils.c b/shared/shell-utils.c
new file mode 100644
index 0000000..7f9ec04
--- /dev/null
+++ b/shared/shell-utils.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2010-2012 Intel Corporation
+ * Copyright 2013 Raspberry Pi Foundation
+ * Copyright 2011-2012,2021 Collabora, Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include "config.h"
+#include "shared/shell-utils.h"
+
+struct weston_output *
+get_default_output(struct weston_compositor *compositor)
+{
+	if (wl_list_empty(&compositor->output_list))
+		return NULL;
+
+	return container_of(compositor->output_list.next,
+			    struct weston_output, link);
+}
+
+struct weston_output *
+get_focused_output(struct weston_compositor *compositor)
+{
+	struct weston_seat *seat;
+	struct weston_output *output = NULL;
+
+	wl_list_for_each(seat, &compositor->seat_list, link) {
+		struct weston_touch *touch = weston_seat_get_touch(seat);
+		struct weston_pointer *pointer = weston_seat_get_pointer(seat);
+		struct weston_keyboard *keyboard =
+			weston_seat_get_keyboard(seat);
+
+		/* Priority has touch focus, then pointer and
+		 * then keyboard focus. We should probably have
+		 * three for loops and check first for touch,
+		 * then for pointer, etc. but unless somebody has some
+		 * objections, I think this is sufficient. */
+		if (touch && touch->focus)
+			output = touch->focus->output;
+		else if (pointer && pointer->focus)
+			output = pointer->focus->output;
+		else if (keyboard && keyboard->focus)
+			output = keyboard->focus->output;
+
+		if (output)
+			break;
+	}
+
+	return output;
+}
+
+/* TODO: Fix this function to take into account nested subsurfaces. */
+void
+surface_subsurfaces_boundingbox(struct weston_surface *surface, int32_t *x,
+				int32_t *y, int32_t *w, int32_t *h)
+{
+	pixman_region32_t region;
+	pixman_box32_t *box;
+	struct weston_subsurface *subsurface;
+
+	pixman_region32_init_rect(&region, 0, 0,
+	                          surface->width,
+	                          surface->height);
+
+	wl_list_for_each(subsurface, &surface->subsurface_list, parent_link) {
+		pixman_region32_union_rect(&region, &region,
+		                           subsurface->position.x,
+		                           subsurface->position.y,
+		                           subsurface->surface->width,
+		                           subsurface->surface->height);
+	}
+
+	box = pixman_region32_extents(&region);
+	if (x)
+		*x = box->x1;
+	if (y)
+		*y = box->y1;
+	if (w)
+		*w = box->x2 - box->x1;
+	if (h)
+		*h = box->y2 - box->y1;
+
+	pixman_region32_fini(&region);
+}
+
+void
+center_on_output(struct weston_view *view, struct weston_output *output)
+{
+	int32_t surf_x, surf_y, width, height;
+	float x, y;
+
+	if (!output) {
+		weston_view_set_position(view, 0, 0);
+		return;
+	}
+
+	surface_subsurfaces_boundingbox(view->surface, &surf_x, &surf_y, &width, &height);
+
+	x = output->x + (output->width - width) / 2 - surf_x / 2;
+	y = output->y + (output->height - height) / 2 - surf_y / 2;
+
+	weston_view_set_position(view, x, y);
+}