weston/kiosk-shell/kiosk-shell-grab.c

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/*
* Copyright 2010-2012 Intel Corporation
* Copyright 2013 Raspberry Pi Foundation
* Copyright 2011-2012,2020 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 "kiosk-shell-grab.h"
#include "shared/helpers.h"
struct kiosk_shell_grab {
struct kiosk_shell_surface *shsurf;
struct wl_listener shsurf_destroy_listener;
struct weston_pointer_grab pointer_grab;
struct weston_touch_grab touch_grab;
struct weston_coord_global delta;
bool active;
};
static void
kiosk_shell_grab_destroy(struct kiosk_shell_grab *shgrab);
/*
* pointer_move_grab_interface
*/
static void
pointer_move_grab_focus(struct weston_pointer_grab *grab)
{
}
static void
pointer_move_grab_axis(struct weston_pointer_grab *grab,
const struct timespec *time,
struct weston_pointer_axis_event *event)
{
}
static void
pointer_move_grab_axis_source(struct weston_pointer_grab *grab,
uint32_t source)
{
}
static void
pointer_move_grab_frame(struct weston_pointer_grab *grab)
{
}
static void
pointer_move_grab_motion(struct weston_pointer_grab *pointer_grab,
const struct timespec *time,
struct weston_pointer_motion_event *event)
{
struct kiosk_shell_grab *shgrab =
container_of(pointer_grab, struct kiosk_shell_grab, pointer_grab);
struct weston_pointer *pointer = pointer_grab->pointer;
struct kiosk_shell_surface *shsurf = shgrab->shsurf;
struct weston_surface *surface;
struct weston_coord_global pos;
weston_pointer_move(pointer, event);
if (!shsurf)
return;
surface = weston_desktop_surface_get_surface(shsurf->desktop_surface);
pos = weston_coord_global_add(pointer->pos, shgrab->delta);
weston_view_set_position(shsurf->view, pos);
weston_compositor_schedule_repaint(surface->compositor);
}
static void
pointer_move_grab_button(struct weston_pointer_grab *pointer_grab,
const struct timespec *time,
uint32_t button, uint32_t state_w)
{
struct kiosk_shell_grab *shgrab =
container_of(pointer_grab, struct kiosk_shell_grab, pointer_grab);
struct weston_pointer *pointer = pointer_grab->pointer;
enum wl_pointer_button_state state = state_w;
if (pointer->button_count == 0 &&
state == WL_POINTER_BUTTON_STATE_RELEASED)
kiosk_shell_grab_destroy(shgrab);
}
static void
pointer_move_grab_cancel(struct weston_pointer_grab *pointer_grab)
{
struct kiosk_shell_grab *shgrab =
container_of(pointer_grab, struct kiosk_shell_grab, pointer_grab);
kiosk_shell_grab_destroy(shgrab);
}
static const struct weston_pointer_grab_interface pointer_move_grab_interface = {
pointer_move_grab_focus,
pointer_move_grab_motion,
pointer_move_grab_button,
pointer_move_grab_axis,
pointer_move_grab_axis_source,
pointer_move_grab_frame,
pointer_move_grab_cancel,
};
/*
* touch_move_grab_interface
*/
static void
touch_move_grab_down(struct weston_touch_grab *grab,
const struct timespec *time,
int touch_id, struct weston_coord_global c)
{
}
static void
touch_move_grab_up(struct weston_touch_grab *touch_grab,
const struct timespec *time, int touch_id)
{
struct kiosk_shell_grab *shgrab =
container_of(touch_grab, struct kiosk_shell_grab, touch_grab);
if (touch_id == 0)
shgrab->active = false;
if (touch_grab->touch->num_tp == 0)
kiosk_shell_grab_destroy(shgrab);
}
static void
touch_move_grab_motion(struct weston_touch_grab *touch_grab,
const struct timespec *time, int touch_id,
struct weston_coord_global unused)
{
struct kiosk_shell_grab *shgrab =
container_of(touch_grab, struct kiosk_shell_grab, touch_grab);
struct weston_touch *touch = touch_grab->touch;
struct kiosk_shell_surface *shsurf = shgrab->shsurf;
struct weston_surface *surface;
struct weston_coord_global pos;
if (!shsurf || !shgrab->active)
return;
surface = weston_desktop_surface_get_surface(shsurf->desktop_surface);
pos = weston_coord_global_add(touch->grab_pos, shgrab->delta);
pos.c = weston_coord_truncate(pos.c);
weston_view_set_position(shsurf->view, pos);
weston_compositor_schedule_repaint(surface->compositor);
}
static void
touch_move_grab_frame(struct weston_touch_grab *grab)
{
}
static void
touch_move_grab_cancel(struct weston_touch_grab *touch_grab)
{
struct kiosk_shell_grab *shgrab =
container_of(touch_grab, struct kiosk_shell_grab, touch_grab);
kiosk_shell_grab_destroy(shgrab);
}
static const struct weston_touch_grab_interface touch_move_grab_interface = {
touch_move_grab_down,
touch_move_grab_up,
touch_move_grab_motion,
touch_move_grab_frame,
touch_move_grab_cancel,
};
/*
* kiosk_shell_grab
*/
static void
kiosk_shell_grab_handle_shsurf_destroy(struct wl_listener *listener, void *data)
{
struct kiosk_shell_grab *shgrab =
container_of(listener, struct kiosk_shell_grab,
shsurf_destroy_listener);
shgrab->shsurf = NULL;
}
static struct kiosk_shell_grab *
kiosk_shell_grab_create(struct kiosk_shell_surface *shsurf)
{
struct kiosk_shell_grab *shgrab;
shgrab = zalloc(sizeof *shgrab);
if (!shgrab)
return NULL;
shgrab->shsurf = shsurf;
shgrab->shsurf_destroy_listener.notify =
kiosk_shell_grab_handle_shsurf_destroy;
wl_signal_add(&shsurf->destroy_signal,
&shgrab->shsurf_destroy_listener);
shsurf->grabbed = true;
return shgrab;
}
enum kiosk_shell_grab_result
kiosk_shell_grab_start_for_pointer_move(struct kiosk_shell_surface *shsurf,
struct weston_pointer *pointer)
{
struct kiosk_shell_grab *shgrab;
if (!shsurf)
return KIOSK_SHELL_GRAB_RESULT_ERROR;
if (shsurf->grabbed ||
weston_desktop_surface_get_fullscreen(shsurf->desktop_surface) ||
weston_desktop_surface_get_maximized(shsurf->desktop_surface))
return KIOSK_SHELL_GRAB_RESULT_IGNORED;
shgrab = kiosk_shell_grab_create(shsurf);
if (!shgrab)
return KIOSK_SHELL_GRAB_RESULT_ERROR;
shgrab->delta = weston_coord_global_sub(
weston_view_get_pos_offset_global(shsurf->view),
pointer->grab_pos);
shgrab->active = true;
weston_seat_break_desktop_grabs(pointer->seat);
shgrab->pointer_grab.interface = &pointer_move_grab_interface;
weston_pointer_start_grab(pointer, &shgrab->pointer_grab);
return KIOSK_SHELL_GRAB_RESULT_OK;
}
enum kiosk_shell_grab_result
kiosk_shell_grab_start_for_touch_move(struct kiosk_shell_surface *shsurf,
struct weston_touch *touch)
{
struct kiosk_shell_grab *shgrab;
if (!shsurf)
return KIOSK_SHELL_GRAB_RESULT_ERROR;
if (shsurf->grabbed ||
weston_desktop_surface_get_fullscreen(shsurf->desktop_surface) ||
weston_desktop_surface_get_maximized(shsurf->desktop_surface))
return KIOSK_SHELL_GRAB_RESULT_IGNORED;
shgrab = kiosk_shell_grab_create(shsurf);
if (!shgrab)
return KIOSK_SHELL_GRAB_RESULT_ERROR;
shgrab->delta = weston_coord_global_sub(
weston_view_get_pos_offset_global(shsurf->view),
touch->grab_pos);
shgrab->active = true;
weston_seat_break_desktop_grabs(touch->seat);
shgrab->touch_grab.interface = &touch_move_grab_interface;
weston_touch_start_grab(touch, &shgrab->touch_grab);
return KIOSK_SHELL_GRAB_RESULT_OK;
}
static void
kiosk_shell_grab_destroy(struct kiosk_shell_grab *shgrab)
{
if (shgrab->shsurf) {
wl_list_remove(&shgrab->shsurf_destroy_listener.link);
shgrab->shsurf->grabbed = false;
}
if (shgrab->pointer_grab.pointer)
weston_pointer_end_grab(shgrab->pointer_grab.pointer);
else if (shgrab->touch_grab.touch)
weston_touch_end_grab(shgrab->touch_grab.touch);
free(shgrab);
}