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weston/libweston/bindings.c

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/*
* Copyright © 2011-2012 Intel Corporation
*
* 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 <stdint.h>
#include <stdlib.h>
#include <linux/input.h>
#include <libweston/libweston.h>
#include "libweston-internal.h"
#include "shared/helpers.h"
#include "shared/timespec-util.h"
struct weston_binding {
uint32_t key;
uint32_t button;
uint32_t axis;
uint32_t modifier;
void *handler;
void *data;
struct wl_list link;
};
static struct weston_binding *
weston_compositor_add_binding(struct weston_compositor *compositor,
uint32_t key, uint32_t button, uint32_t axis,
uint32_t modifier, void *handler, void *data)
{
struct weston_binding *binding;
binding = malloc(sizeof *binding);
if (binding == NULL)
return NULL;
binding->key = key;
binding->button = button;
binding->axis = axis;
binding->modifier = modifier;
binding->handler = handler;
binding->data = data;
return binding;
}
WL_EXPORT struct weston_binding *
weston_compositor_add_key_binding(struct weston_compositor *compositor,
uint32_t key, uint32_t modifier,
weston_key_binding_handler_t handler,
void *data)
{
struct weston_binding *binding;
binding = weston_compositor_add_binding(compositor, key, 0, 0,
modifier, handler, data);
if (binding == NULL)
return NULL;
wl_list_insert(compositor->key_binding_list.prev, &binding->link);
return binding;
}
WL_EXPORT struct weston_binding *
weston_compositor_add_modifier_binding(struct weston_compositor *compositor,
uint32_t modifier,
weston_modifier_binding_handler_t handler,
void *data)
{
struct weston_binding *binding;
binding = weston_compositor_add_binding(compositor, 0, 0, 0,
modifier, handler, data);
if (binding == NULL)
return NULL;
wl_list_insert(compositor->modifier_binding_list.prev, &binding->link);
return binding;
}
WL_EXPORT struct weston_binding *
weston_compositor_add_button_binding(struct weston_compositor *compositor,
uint32_t button, uint32_t modifier,
weston_button_binding_handler_t handler,
void *data)
{
struct weston_binding *binding;
binding = weston_compositor_add_binding(compositor, 0, button, 0,
modifier, handler, data);
if (binding == NULL)
return NULL;
wl_list_insert(compositor->button_binding_list.prev, &binding->link);
return binding;
}
WL_EXPORT struct weston_binding *
weston_compositor_add_touch_binding(struct weston_compositor *compositor,
uint32_t modifier,
weston_touch_binding_handler_t handler,
void *data)
{
struct weston_binding *binding;
binding = weston_compositor_add_binding(compositor, 0, 0, 0,
modifier, handler, data);
if (binding == NULL)
return NULL;
wl_list_insert(compositor->touch_binding_list.prev, &binding->link);
return binding;
}
WL_EXPORT struct weston_binding *
weston_compositor_add_axis_binding(struct weston_compositor *compositor,
uint32_t axis, uint32_t modifier,
weston_axis_binding_handler_t handler,
void *data)
{
struct weston_binding *binding;
binding = weston_compositor_add_binding(compositor, 0, 0, axis,
modifier, handler, data);
if (binding == NULL)
return NULL;
wl_list_insert(compositor->axis_binding_list.prev, &binding->link);
return binding;
}
WL_EXPORT struct weston_binding *
weston_compositor_add_debug_binding(struct weston_compositor *compositor,
uint32_t key,
weston_key_binding_handler_t handler,
void *data)
{
struct weston_binding *binding;
binding = weston_compositor_add_binding(compositor, key, 0, 0, 0,
handler, data);
wl_list_insert(compositor->debug_binding_list.prev, &binding->link);
return binding;
}
WL_EXPORT void
weston_binding_destroy(struct weston_binding *binding)
{
wl_list_remove(&binding->link);
free(binding);
}
void
weston_binding_list_destroy_all(struct wl_list *list)
{
struct weston_binding *binding, *tmp;
wl_list_for_each_safe(binding, tmp, list, link)
weston_binding_destroy(binding);
}
struct binding_keyboard_grab {
uint32_t key;
struct weston_keyboard_grab grab;
};
static void
binding_key(struct weston_keyboard_grab *grab,
const struct timespec *time, uint32_t key, uint32_t state_w)
{
struct binding_keyboard_grab *b =
container_of(grab, struct binding_keyboard_grab, grab);
struct wl_resource *resource;
enum wl_keyboard_key_state state = state_w;
uint32_t serial;
struct weston_keyboard *keyboard = grab->keyboard;
struct wl_display *display = keyboard->seat->compositor->wl_display;
uint32_t msecs;
if (key == b->key) {
if (state == WL_KEYBOARD_KEY_STATE_RELEASED) {
weston_keyboard_end_grab(grab->keyboard);
if (keyboard->input_method_resource)
keyboard->grab = &keyboard->input_method_grab;
free(b);
} else {
/* Don't send the key press event for the binding key */
return;
}
}
if (!wl_list_empty(&keyboard->focus_resource_list)) {
serial = wl_display_next_serial(display);
msecs = timespec_to_msec(time);
wl_resource_for_each(resource, &keyboard->focus_resource_list) {
wl_keyboard_send_key(resource,
serial,
msecs,
key,
state);
}
}
}
static void
binding_modifiers(struct weston_keyboard_grab *grab, uint32_t serial,
uint32_t mods_depressed, uint32_t mods_latched,
uint32_t mods_locked, uint32_t group)
{
struct wl_resource *resource;
wl_resource_for_each(resource, &grab->keyboard->focus_resource_list) {
wl_keyboard_send_modifiers(resource, serial, mods_depressed,
mods_latched, mods_locked, group);
}
}
static void
binding_cancel(struct weston_keyboard_grab *grab)
{
struct binding_keyboard_grab *binding_grab =
container_of(grab, struct binding_keyboard_grab, grab);
weston_keyboard_end_grab(grab->keyboard);
free(binding_grab);
}
static const struct weston_keyboard_grab_interface binding_grab = {
binding_key,
binding_modifiers,
binding_cancel,
};
static void
install_binding_grab(struct weston_keyboard *keyboard,
const struct timespec *time, uint32_t key,
struct weston_surface *focus)
{
struct binding_keyboard_grab *grab;
grab = malloc(sizeof *grab);
grab->key = key;
grab->grab.interface = &binding_grab;
weston_keyboard_start_grab(keyboard, &grab->grab);
/* Notify the surface which had the focus before this binding
* triggered that we stole a keypress from under it, by forcing
* a wl_keyboard leave/enter pair. The enter event will contain
* the pressed key in the keys array, so the client will know
* the exact state of the keyboard.
* If the old focus surface is different than the new one it
* means it was changed in the binding handler, so it received
* the enter event already. */
if (focus && keyboard->focus == focus) {
weston_keyboard_set_focus(keyboard, NULL);
weston_keyboard_set_focus(keyboard, focus);
}
}
void
weston_compositor_run_key_binding(struct weston_compositor *compositor,
struct weston_keyboard *keyboard,
const struct timespec *time, uint32_t key,
enum wl_keyboard_key_state state)
{
struct weston_binding *b, *tmp;
struct weston_surface *focus;
struct weston_seat *seat = keyboard->seat;
if (state == WL_KEYBOARD_KEY_STATE_RELEASED)
return;
/* Invalidate all active modifier bindings. */
wl_list_for_each(b, &compositor->modifier_binding_list, link)
b->key = key;
wl_list_for_each_safe(b, tmp, &compositor->key_binding_list, link) {
if (b->key == key && b->modifier == seat->modifier_state) {
weston_key_binding_handler_t handler = b->handler;
focus = keyboard->focus;
handler(keyboard, time, key, b->data);
/* If this was a key binding and it didn't
* install a keyboard grab, install one now to
* swallow the key press. */
if (keyboard->grab ==
&keyboard->default_grab)
install_binding_grab(keyboard,
time,
key,
focus);
}
}
}
void
weston_compositor_run_modifier_binding(struct weston_compositor *compositor,
struct weston_keyboard *keyboard,
enum weston_keyboard_modifier modifier,
enum wl_keyboard_key_state state)
{
struct weston_binding *b, *tmp;
if (keyboard->grab != &keyboard->default_grab)
return;
wl_list_for_each_safe(b, tmp, &compositor->modifier_binding_list, link) {
weston_modifier_binding_handler_t handler = b->handler;
if (b->modifier != modifier)
continue;
/* Prime the modifier binding. */
if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
b->key = 0;
continue;
}
/* Ignore the binding if a key was pressed in between. */
else if (b->key != 0) {
return;
}
handler(keyboard, modifier, b->data);
}
}
void
weston_compositor_run_button_binding(struct weston_compositor *compositor,
struct weston_pointer *pointer,
const struct timespec *time,
uint32_t button,
enum wl_pointer_button_state state)
{
struct weston_binding *b, *tmp;
if (state == WL_POINTER_BUTTON_STATE_RELEASED)
return;
/* Invalidate all active modifier bindings. */
wl_list_for_each(b, &compositor->modifier_binding_list, link)
b->key = button;
wl_list_for_each_safe(b, tmp, &compositor->button_binding_list, link) {
if (b->button == button &&
b->modifier == pointer->seat->modifier_state) {
weston_button_binding_handler_t handler = b->handler;
handler(pointer, time, button, b->data);
}
}
}
void
weston_compositor_run_touch_binding(struct weston_compositor *compositor,
struct weston_touch *touch,
const struct timespec *time,
int touch_type)
{
struct weston_binding *b, *tmp;
if (touch->num_tp != 1 || touch_type != WL_TOUCH_DOWN)
return;
wl_list_for_each_safe(b, tmp, &compositor->touch_binding_list, link) {
if (b->modifier == touch->seat->modifier_state) {
weston_touch_binding_handler_t handler = b->handler;
handler(touch, time, b->data);
}
}
}
int
weston_compositor_run_axis_binding(struct weston_compositor *compositor,
struct weston_pointer *pointer,
const struct timespec *time,
struct weston_pointer_axis_event *event)
{
struct weston_binding *b, *tmp;
/* Invalidate all active modifier bindings. */
wl_list_for_each(b, &compositor->modifier_binding_list, link)
b->key = event->axis;
wl_list_for_each_safe(b, tmp, &compositor->axis_binding_list, link) {
if (b->axis == event->axis &&
b->modifier == pointer->seat->modifier_state) {
weston_axis_binding_handler_t handler = b->handler;
handler(pointer, time, event, b->data);
return 1;
}
}
return 0;
}
int
weston_compositor_run_debug_binding(struct weston_compositor *compositor,
struct weston_keyboard *keyboard,
const struct timespec *time, uint32_t key,
enum wl_keyboard_key_state state)
{
weston_key_binding_handler_t handler;
struct weston_binding *binding, *tmp;
int count = 0;
wl_list_for_each_safe(binding, tmp, &compositor->debug_binding_list, link) {
if (key != binding->key)
continue;
count++;
handler = binding->handler;
handler(keyboard, time, key, binding->data);
}
return count;
}
struct debug_binding_grab {
struct weston_keyboard_grab grab;
struct weston_seat *seat;
uint32_t key[2];
int key_released[2];
};
static void
debug_binding_key(struct weston_keyboard_grab *grab, const struct timespec *time,
uint32_t key, uint32_t state)
{
struct debug_binding_grab *db = (struct debug_binding_grab *) grab;
struct weston_compositor *ec = db->seat->compositor;
struct wl_display *display = ec->wl_display;
struct wl_resource *resource;
uint32_t serial;
int send = 0, terminate = 0;
int check_binding = 1;
int i;
struct wl_list *resource_list;
uint32_t msecs;
if (state == WL_KEYBOARD_KEY_STATE_RELEASED) {
/* Do not run bindings on key releases */
check_binding = 0;
for (i = 0; i < 2; i++)
if (key == db->key[i])
db->key_released[i] = 1;
if (db->key_released[0] && db->key_released[1]) {
/* All key releases been swalled so end the grab */
terminate = 1;
} else if (key != db->key[0] && key != db->key[1]) {
/* Should not swallow release of other keys */
send = 1;
}
} else if (key == db->key[0] && !db->key_released[0]) {
/* Do not check bindings for the first press of the binding
* key. This allows it to be used as a debug shortcut.
* We still need to swallow this event. */
check_binding = 0;
} else if (db->key[1]) {
/* If we already ran a binding don't process another one since
* we can't keep track of all the binding keys that were
* pressed in order to swallow the release events. */
send = 1;
check_binding = 0;
}
if (check_binding) {
if (weston_compositor_run_debug_binding(ec, grab->keyboard,
time, key, state)) {
/* We ran a binding so swallow the press and keep the
* grab to swallow the released too. */
send = 0;
terminate = 0;
db->key[1] = key;
} else {
/* Terminate the grab since the key pressed is not a
* debug binding key. */
send = 1;
terminate = 1;
}
}
if (send) {
serial = wl_display_next_serial(display);
resource_list = &grab->keyboard->focus_resource_list;
msecs = timespec_to_msec(time);
wl_resource_for_each(resource, resource_list) {
wl_keyboard_send_key(resource, serial, msecs, key, state);
}
}
if (terminate) {
weston_keyboard_end_grab(grab->keyboard);
if (grab->keyboard->input_method_resource)
grab->keyboard->grab = &grab->keyboard->input_method_grab;
free(db);
}
}
static void
debug_binding_modifiers(struct weston_keyboard_grab *grab, uint32_t serial,
uint32_t mods_depressed, uint32_t mods_latched,
uint32_t mods_locked, uint32_t group)
{
struct wl_resource *resource;
struct wl_list *resource_list;
resource_list = &grab->keyboard->focus_resource_list;
wl_resource_for_each(resource, resource_list) {
wl_keyboard_send_modifiers(resource, serial, mods_depressed,
mods_latched, mods_locked, group);
}
}
static void
debug_binding_cancel(struct weston_keyboard_grab *grab)
{
struct debug_binding_grab *db = (struct debug_binding_grab *) grab;
weston_keyboard_end_grab(grab->keyboard);
free(db);
}
struct weston_keyboard_grab_interface debug_binding_keyboard_grab = {
debug_binding_key,
debug_binding_modifiers,
debug_binding_cancel,
};
static void
debug_binding(struct weston_keyboard *keyboard, const struct timespec *time,
uint32_t key, void *data)
{
struct debug_binding_grab *grab;
grab = calloc(1, sizeof *grab);
if (!grab)
return;
grab->seat = keyboard->seat;
grab->key[0] = key;
grab->grab.interface = &debug_binding_keyboard_grab;
weston_keyboard_start_grab(keyboard, &grab->grab);
}
/** Install the trigger binding for debug bindings.
*
* \param compositor The compositor.
* \param mod The modifier.
*
* This will add a key binding for modifier+SHIFT+SPACE that will trigger
* debug key bindings.
*/
WL_EXPORT void
weston_install_debug_key_binding(struct weston_compositor *compositor,
uint32_t mod)
{
weston_compositor_add_key_binding(compositor, KEY_SPACE,
mod | MODIFIER_SHIFT,
debug_binding, NULL);
}