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shell: handle surface destruction during move, resize and rotate grabs

Browse source 
When the surface being moved, resized or rotated was destroyed, the
compositor would crash.

Fix this by using a destroy listener on the referenced surface. To
reduce code duplication, the surface reference and the destroy
listener is added to a new struct shell_grab.
This commit is contained in:
Ander Conselvan de Oliveira 2012-04-04 17:48:05 +03:00 committed by Kristian Høgsberg
parent ba25bd7be1
commit fe0444a9a9
1 changed files with 107 additions and 44 deletions
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151
src/shell.c
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@ -130,15 +130,19 @@ struct shell_surface {
int force_configure; int force_configure;
}; };
struct weston_move_grab { struct shell_grab {
struct wl_pointer_grab grab; struct wl_pointer_grab grab;
struct weston_surface *surface; struct shell_surface *shsurf;
struct wl_listener shsurf_destroy_listener;
};
struct weston_move_grab {
struct shell_grab base;
int32_t dx, dy; int32_t dx, dy;
}; };
struct rotate_grab { struct rotate_grab {
struct wl_pointer_grab grab; struct shell_grab base;
struct shell_surface *surface;
struct weston_matrix rotation; struct weston_matrix rotation;
struct { struct {
int32_t x; int32_t x;
@ -146,10 +150,44 @@ struct rotate_grab {
} center; } center;
}; };
static void
destroy_shell_grab_shsurf(struct wl_listener *listener,
struct wl_resource *resource, uint32_t time)
{
struct shell_grab *grab;
grab = container_of(listener, struct shell_grab,
shsurf_destroy_listener);
grab->shsurf = NULL;
}
static void
shell_grab_init(struct shell_grab *grab,
const struct wl_pointer_grab_interface *interface,
struct shell_surface *shsurf)
{
grab->grab.interface = interface;
grab->shsurf = shsurf;
grab->shsurf_destroy_listener.func = destroy_shell_grab_shsurf;
wl_list_insert(shsurf->resource.destroy_listener_list.prev,
&grab->shsurf_destroy_listener.link);
}
static void
shell_grab_finish(struct shell_grab *grab)
{
wl_list_remove(&grab->shsurf_destroy_listener.link);
}
static void static void
center_on_output(struct weston_surface *surface, center_on_output(struct weston_surface *surface,
struct weston_output *output); struct weston_output *output);
static struct shell_surface *
get_shell_surface(struct weston_surface *surface);
static void static void
shell_configuration(struct wl_shell *shell) shell_configuration(struct wl_shell *shell)
{ {
@ -187,7 +225,13 @@ move_grab_motion(struct wl_pointer_grab *grab,
{ {
struct weston_move_grab *move = (struct weston_move_grab *) grab; struct weston_move_grab *move = (struct weston_move_grab *) grab;
struct wl_input_device *device = grab->input_device; struct wl_input_device *device = grab->input_device;
struct weston_surface *es = move->surface; struct shell_surface *shsurf = move->base.shsurf;
struct weston_surface *es;
if (!shsurf)
return;
es = shsurf->surface;
weston_surface_configure(es, weston_surface_configure(es,
device->x + move->dx, device->x + move->dx,
@ -199,9 +243,12 @@ static void
move_grab_button(struct wl_pointer_grab *grab, move_grab_button(struct wl_pointer_grab *grab,
uint32_t time, uint32_t button, int32_t state) uint32_t time, uint32_t button, int32_t state)
{ {
struct shell_grab *shell_grab = container_of(grab, struct shell_grab,
grab);
struct wl_input_device *device = grab->input_device; struct wl_input_device *device = grab->input_device;
if (device->button_count == 0 && state == 0) { if (device->button_count == 0 && state == 0) {
shell_grab_finish(shell_grab);
wl_input_device_end_pointer_grab(device, time); wl_input_device_end_pointer_grab(device, time);
free(grab); free(grab);
} }
@ -218,17 +265,22 @@ weston_surface_move(struct weston_surface *es,
struct weston_input_device *wd, uint32_t time) struct weston_input_device *wd, uint32_t time)
{ {
struct weston_move_grab *move; struct weston_move_grab *move;
struct shell_surface *shsurf = get_shell_surface(es);
if (!shsurf)
return -1;
move = malloc(sizeof *move); move = malloc(sizeof *move);
if (!move) if (!move)
return -1; return -1;
move->grab.interface = &move_grab_interface; shell_grab_init(&move->base, &move_grab_interface, shsurf);
move->dx = es->geometry.x - wd->input_device.grab_x; move->dx = es->geometry.x - wd->input_device.grab_x;
move->dy = es->geometry.y - wd->input_device.grab_y; move->dy = es->geometry.y - wd->input_device.grab_y;
move->surface = es;
wl_input_device_start_pointer_grab(&wd->input_device, &move->grab, time); wl_input_device_start_pointer_grab(&wd->input_device,
&move->base.grab, time);
wl_input_device_set_pointer_focus(&wd->input_device, NULL, time, 0, 0); wl_input_device_set_pointer_focus(&wd->input_device, NULL, time, 0, 0);
@ -252,10 +304,9 @@ shell_surface_move(struct wl_client *client, struct wl_resource *resource,
} }
struct weston_resize_grab { struct weston_resize_grab {
struct wl_pointer_grab grab; struct shell_grab base;
uint32_t edges; uint32_t edges;
int32_t width, height; int32_t width, height;
struct shell_surface *shsurf;
}; };
static void static void
@ -268,10 +319,13 @@ resize_grab_motion(struct wl_pointer_grab *grab,
int32_t from_x, from_y; int32_t from_x, from_y;
int32_t to_x, to_y; int32_t to_x, to_y;
weston_surface_from_global(resize->shsurf->surface, if (!resize->base.shsurf)
return;
weston_surface_from_global(resize->base.shsurf->surface,
device->grab_x, device->grab_y, device->grab_x, device->grab_y,
&from_x, &from_y); &from_x, &from_y);
weston_surface_from_global(resize->shsurf->surface, weston_surface_from_global(resize->base.shsurf->surface,
device->x, device->y, &to_x, &to_y); device->x, device->y, &to_x, &to_y);
if (resize->edges & WL_SHELL_SURFACE_RESIZE_LEFT) { if (resize->edges & WL_SHELL_SURFACE_RESIZE_LEFT) {
@ -290,7 +344,7 @@ resize_grab_motion(struct wl_pointer_grab *grab,
height = resize->height; height = resize->height;
} }
wl_shell_surface_send_configure(&resize->shsurf->resource, wl_shell_surface_send_configure(&resize->base.shsurf->resource,
time, resize->edges, width, height); time, resize->edges, width, height);
} }
@ -298,9 +352,11 @@ static void
resize_grab_button(struct wl_pointer_grab *grab, resize_grab_button(struct wl_pointer_grab *grab,
uint32_t time, uint32_t button, int32_t state) uint32_t time, uint32_t button, int32_t state)
{ {
struct weston_resize_grab *resize = (struct weston_resize_grab *) grab;
struct wl_input_device *device = grab->input_device; struct wl_input_device *device = grab->input_device;
if (device->button_count == 0 && state == 0) { if (device->button_count == 0 && state == 0) {
shell_grab_finish(&resize->base);
wl_input_device_end_pointer_grab(device, time); wl_input_device_end_pointer_grab(device, time);
free(grab); free(grab);
} }
@ -330,13 +386,14 @@ weston_surface_resize(struct shell_surface *shsurf,
if (!resize) if (!resize)
return -1; return -1;
resize->grab.interface = &resize_grab_interface; shell_grab_init(&resize->base, &resize_grab_interface, shsurf);
resize->edges = edges; resize->edges = edges;
resize->width = shsurf->surface->geometry.width; resize->width = shsurf->surface->geometry.width;
resize->height = shsurf->surface->geometry.height; resize->height = shsurf->surface->geometry.height;
resize->shsurf = shsurf;
wl_input_device_start_pointer_grab(&wd->input_device, &resize->grab, time); wl_input_device_start_pointer_grab(&wd->input_device,
&resize->base.grab, time);
wl_input_device_set_pointer_focus(&wd->input_device, NULL, time, 0, 0); wl_input_device_set_pointer_focus(&wd->input_device, NULL, time, 0, 0);
@ -1261,25 +1318,30 @@ rotate_grab_motion(struct wl_pointer_grab *grab,
uint32_t time, int32_t x, int32_t y) uint32_t time, int32_t x, int32_t y)
{ {
struct rotate_grab *rotate = struct rotate_grab *rotate =
container_of(grab, struct rotate_grab, grab); container_of(grab, struct rotate_grab, base.grab);
struct wl_input_device *device = grab->input_device; struct wl_input_device *device = grab->input_device;
struct shell_surface *surface = rotate->surface; struct shell_surface *shsurf = rotate->base.shsurf;
struct weston_surface *base_surface = surface->surface; struct weston_surface *surface;
GLfloat cx = 0.5f * base_surface->geometry.width; GLfloat cx, cy, dx, dy, cposx, cposy, dposx, dposy, r;
GLfloat cy = 0.5f * base_surface->geometry.height;
GLfloat dx, dy, cposx, cposy, dposx, dposy; if (!shsurf)
GLfloat r; return;
surface = shsurf->surface;
cx = 0.5f * surface->geometry.width;
cy = 0.5f * surface->geometry.height;
dx = device->x - rotate->center.x; dx = device->x - rotate->center.x;
dy = device->y - rotate->center.y; dy = device->y - rotate->center.y;
r = sqrtf(dx * dx + dy * dy); r = sqrtf(dx * dx + dy * dy);
wl_list_remove(&surface->rotation.transform.link); wl_list_remove(&shsurf->rotation.transform.link);
surface->surface->geometry.dirty = 1; shsurf->surface->geometry.dirty = 1;
if (r > 20.0f) { if (r > 20.0f) {
struct weston_matrix *matrix = struct weston_matrix *matrix =
&surface->rotation.transform.matrix; &shsurf->rotation.transform.matrix;
weston_matrix_init(&rotate->rotation); weston_matrix_init(&rotate->rotation);
rotate->rotation.d[0] = dx / r; rotate->rotation.d[0] = dx / r;
@ -1289,35 +1351,35 @@ rotate_grab_motion(struct wl_pointer_grab *grab,
weston_matrix_init(matrix); weston_matrix_init(matrix);
weston_matrix_translate(matrix, -cx, -cy, 0.0f); weston_matrix_translate(matrix, -cx, -cy, 0.0f);
weston_matrix_multiply(matrix, &surface->rotation.rotation); weston_matrix_multiply(matrix, &shsurf->rotation.rotation);
weston_matrix_multiply(matrix, &rotate->rotation); weston_matrix_multiply(matrix, &rotate->rotation);
weston_matrix_translate(matrix, cx, cy, 0.0f); weston_matrix_translate(matrix, cx, cy, 0.0f);
wl_list_insert( wl_list_insert(
&surface->surface->geometry.transformation_list, &shsurf->surface->geometry.transformation_list,
&surface->rotation.transform.link); &shsurf->rotation.transform.link);
} else { } else {
wl_list_init(&surface->rotation.transform.link); wl_list_init(&shsurf->rotation.transform.link);
weston_matrix_init(&surface->rotation.rotation); weston_matrix_init(&shsurf->rotation.rotation);
weston_matrix_init(&rotate->rotation); weston_matrix_init(&rotate->rotation);
} }
/* We need to adjust the position of the surface /* We need to adjust the position of the surface
* in case it was resized in a rotated state before */ * in case it was resized in a rotated state before */
cposx = base_surface->geometry.x + cx; cposx = surface->geometry.x + cx;
cposy = base_surface->geometry.y + cy; cposy = surface->geometry.y + cy;
dposx = rotate->center.x - cposx; dposx = rotate->center.x - cposx;
dposy = rotate->center.y - cposy; dposy = rotate->center.y - cposy;
if (dposx != 0.0f || dposy != 0.0f) { if (dposx != 0.0f || dposy != 0.0f) {
weston_surface_set_position(base_surface, weston_surface_set_position(surface,
base_surface->geometry.x + dposx, surface->geometry.x + dposx,
base_surface->geometry.y + dposy); surface->geometry.y + dposy);
} }
/* Repaint implies weston_surface_update_transform(), which /* Repaint implies weston_surface_update_transform(), which
* lazily applies the damage due to rotation update. * lazily applies the damage due to rotation update.
*/ */
weston_compositor_schedule_repaint(surface->surface->compositor); weston_compositor_schedule_repaint(shsurf->surface->compositor);
} }
static void static void
@ -1325,13 +1387,15 @@ rotate_grab_button(struct wl_pointer_grab *grab,
uint32_t time, uint32_t button, int32_t state) uint32_t time, uint32_t button, int32_t state)
{ {
struct rotate_grab *rotate = struct rotate_grab *rotate =
container_of(grab, struct rotate_grab, grab); container_of(grab, struct rotate_grab, base.grab);
struct wl_input_device *device = grab->input_device; struct wl_input_device *device = grab->input_device;
struct shell_surface *surface = rotate->surface; struct shell_surface *shsurf = rotate->base.shsurf;
if (device->button_count == 0 && state == 0) { if (device->button_count == 0 && state == 0) {
weston_matrix_multiply(&surface->rotation.rotation, if (shsurf)
&rotate->rotation); weston_matrix_multiply(&shsurf->rotation.rotation,
&rotate->rotation);
shell_grab_finish(&rotate->base);
wl_input_device_end_pointer_grab(device, time); wl_input_device_end_pointer_grab(device, time);
free(rotate); free(rotate);
} }
@ -1375,15 +1439,14 @@ rotate_binding(struct wl_input_device *device, uint32_t time,
if (!rotate) if (!rotate)
return; return;
rotate->grab.interface = &rotate_grab_interface; shell_grab_init(&rotate->base, &rotate_grab_interface, surface);
rotate->surface = surface;
weston_surface_to_global(surface->surface, weston_surface_to_global(surface->surface,
surface->surface->geometry.width / 2, surface->surface->geometry.width / 2,
surface->surface->geometry.height / 2, surface->surface->geometry.height / 2,
&rotate->center.x, &rotate->center.y); &rotate->center.x, &rotate->center.y);
wl_input_device_start_pointer_grab(device, &rotate->grab, time); wl_input_device_start_pointer_grab(device, &rotate->base.grab, time);
dx = device->x - rotate->center.x; dx = device->x - rotate->center.x;
dy = device->y - rotate->center.y; dy = device->y - rotate->center.y;