weston/compositor/text-backend.c
Daniel Stone 97863d6f0d text-input: Clear out context->input pointer
If we destroy the text_input (e.g. due to surface deactivation) whilst
the IM manager (the client holding the input_method_context resource,
usually weston-keyboard) sends an event, we can hit a segfault in
text-backend. This is because we free the text_input structure, but
don't actually clear the context->input structure even when we send the
deactivate event.

This is clearly intended to be catered for, since context->input is
always checked for NULL before we relay any events.

This is enough to fix one cause of text-test failing, but it's
ultimately error-prone until we have a no-op test-shell; there is still
a race where weston-desktop-shell can launch weston-keyboard before
text-test manages to bind zwp_text_input_manager.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Maniphest Tasks: https://phabricator.freedesktop.org/T7615
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-11-18 15:42:42 +02:00

1087 lines
29 KiB
C

/*
* Copyright © 2012 Openismus GmbH
* Copyright © 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 <stdbool.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include "compositor.h"
#include "weston.h"
#include "text-input-unstable-v1-server-protocol.h"
#include "input-method-unstable-v1-server-protocol.h"
#include "shared/helpers.h"
struct text_input_manager;
struct input_method;
struct input_method_context;
struct text_backend;
struct text_input {
struct wl_resource *resource;
struct weston_compositor *ec;
struct wl_list input_methods;
struct weston_surface *surface;
pixman_box32_t cursor_rectangle;
bool input_panel_visible;
struct text_input_manager *manager;
};
struct text_input_manager {
struct wl_global *text_input_manager_global;
struct wl_listener destroy_listener;
struct text_input *current_panel;
struct weston_compositor *ec;
};
struct input_method {
struct wl_resource *input_method_binding;
struct wl_global *input_method_global;
struct wl_listener destroy_listener;
struct weston_seat *seat;
struct text_input *input;
struct wl_list link;
struct wl_listener keyboard_focus_listener;
bool focus_listener_initialized;
struct input_method_context *context;
struct text_backend *text_backend;
};
struct input_method_context {
struct wl_resource *resource;
struct text_input *input;
struct input_method *input_method;
struct wl_resource *keyboard;
};
struct text_backend {
struct weston_compositor *compositor;
struct {
char *path;
struct wl_client *client;
unsigned deathcount;
uint32_t deathstamp;
} input_method;
struct wl_listener client_listener;
struct wl_listener seat_created_listener;
};
static void
input_method_context_create(struct text_input *input,
struct input_method *input_method);
static void
input_method_context_end_keyboard_grab(struct input_method_context *context);
static void
input_method_init_seat(struct weston_seat *seat);
static void
deactivate_input_method(struct input_method *input_method)
{
struct text_input *text_input = input_method->input;
struct weston_compositor *ec = text_input->ec;
if (input_method->context && input_method->input_method_binding) {
input_method_context_end_keyboard_grab(input_method->context);
zwp_input_method_v1_send_deactivate(
input_method->input_method_binding,
input_method->context->resource);
input_method->context->input = NULL;
}
wl_list_remove(&input_method->link);
input_method->input = NULL;
input_method->context = NULL;
if (wl_list_empty(&text_input->input_methods) &&
text_input->input_panel_visible) {
wl_signal_emit(&ec->hide_input_panel_signal, ec);
text_input->input_panel_visible = false;
text_input->manager->current_panel = NULL;
}
zwp_text_input_v1_send_leave(text_input->resource);
}
static void
destroy_text_input(struct wl_resource *resource)
{
struct text_input *text_input = wl_resource_get_user_data(resource);
struct input_method *input_method, *next;
wl_list_for_each_safe(input_method, next,
&text_input->input_methods, link)
deactivate_input_method(input_method);
free(text_input);
}
static void
text_input_set_surrounding_text(struct wl_client *client,
struct wl_resource *resource,
const char *text,
uint32_t cursor,
uint32_t anchor)
{
struct text_input *text_input = wl_resource_get_user_data(resource);
struct input_method *input_method, *next;
wl_list_for_each_safe(input_method, next,
&text_input->input_methods, link) {
if (!input_method->context)
continue;
zwp_input_method_context_v1_send_surrounding_text(
input_method->context->resource, text, cursor, anchor);
}
}
static void
text_input_activate(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *seat,
struct wl_resource *surface)
{
struct text_input *text_input = wl_resource_get_user_data(resource);
struct weston_seat *weston_seat = wl_resource_get_user_data(seat);
struct input_method *input_method = weston_seat->input_method;
struct weston_compositor *ec = text_input->ec;
struct text_input *current;
if (input_method->input == text_input)
return;
if (input_method->input)
deactivate_input_method(input_method);
input_method->input = text_input;
wl_list_insert(&text_input->input_methods, &input_method->link);
input_method_init_seat(weston_seat);
text_input->surface = wl_resource_get_user_data(surface);
input_method_context_create(text_input, input_method);
current = text_input->manager->current_panel;
if (current && current != text_input) {
current->input_panel_visible = false;
wl_signal_emit(&ec->hide_input_panel_signal, ec);
text_input->manager->current_panel = NULL;
}
if (text_input->input_panel_visible) {
wl_signal_emit(&ec->show_input_panel_signal,
text_input->surface);
wl_signal_emit(&ec->update_input_panel_signal,
&text_input->cursor_rectangle);
text_input->manager->current_panel = text_input;
}
zwp_text_input_v1_send_enter(text_input->resource,
text_input->surface->resource);
}
static void
text_input_deactivate(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *seat)
{
struct weston_seat *weston_seat = wl_resource_get_user_data(seat);
if (weston_seat->input_method->input)
deactivate_input_method(weston_seat->input_method);
}
static void
text_input_reset(struct wl_client *client,
struct wl_resource *resource)
{
struct text_input *text_input = wl_resource_get_user_data(resource);
struct input_method *input_method, *next;
wl_list_for_each_safe(input_method, next,
&text_input->input_methods, link) {
if (!input_method->context)
continue;
zwp_input_method_context_v1_send_reset(
input_method->context->resource);
}
}
static void
text_input_set_cursor_rectangle(struct wl_client *client,
struct wl_resource *resource,
int32_t x,
int32_t y,
int32_t width,
int32_t height)
{
struct text_input *text_input = wl_resource_get_user_data(resource);
struct weston_compositor *ec = text_input->ec;
text_input->cursor_rectangle.x1 = x;
text_input->cursor_rectangle.y1 = y;
text_input->cursor_rectangle.x2 = x + width;
text_input->cursor_rectangle.y2 = y + height;
wl_signal_emit(&ec->update_input_panel_signal,
&text_input->cursor_rectangle);
}
static void
text_input_set_content_type(struct wl_client *client,
struct wl_resource *resource,
uint32_t hint,
uint32_t purpose)
{
struct text_input *text_input = wl_resource_get_user_data(resource);
struct input_method *input_method, *next;
wl_list_for_each_safe(input_method, next,
&text_input->input_methods, link) {
if (!input_method->context)
continue;
zwp_input_method_context_v1_send_content_type(
input_method->context->resource, hint, purpose);
}
}
static void
text_input_invoke_action(struct wl_client *client,
struct wl_resource *resource,
uint32_t button,
uint32_t index)
{
struct text_input *text_input = wl_resource_get_user_data(resource);
struct input_method *input_method, *next;
wl_list_for_each_safe(input_method, next,
&text_input->input_methods, link) {
if (!input_method->context)
continue;
zwp_input_method_context_v1_send_invoke_action(
input_method->context->resource, button, index);
}
}
static void
text_input_commit_state(struct wl_client *client,
struct wl_resource *resource,
uint32_t serial)
{
struct text_input *text_input = wl_resource_get_user_data(resource);
struct input_method *input_method, *next;
wl_list_for_each_safe(input_method, next,
&text_input->input_methods, link) {
if (!input_method->context)
continue;
zwp_input_method_context_v1_send_commit_state(
input_method->context->resource, serial);
}
}
static void
text_input_show_input_panel(struct wl_client *client,
struct wl_resource *resource)
{
struct text_input *text_input = wl_resource_get_user_data(resource);
struct weston_compositor *ec = text_input->ec;
text_input->input_panel_visible = true;
if (!wl_list_empty(&text_input->input_methods)) {
wl_signal_emit(&ec->show_input_panel_signal,
text_input->surface);
wl_signal_emit(&ec->update_input_panel_signal,
&text_input->cursor_rectangle);
}
}
static void
text_input_hide_input_panel(struct wl_client *client,
struct wl_resource *resource)
{
struct text_input *text_input = wl_resource_get_user_data(resource);
struct weston_compositor *ec = text_input->ec;
text_input->input_panel_visible = false;
if (!wl_list_empty(&text_input->input_methods) &&
text_input == text_input->manager->current_panel) {
text_input->manager->current_panel = NULL;
wl_signal_emit(&ec->hide_input_panel_signal, ec);
}
}
static void
text_input_set_preferred_language(struct wl_client *client,
struct wl_resource *resource,
const char *language)
{
struct text_input *text_input = wl_resource_get_user_data(resource);
struct input_method *input_method, *next;
wl_list_for_each_safe(input_method, next,
&text_input->input_methods, link) {
if (!input_method->context)
continue;
zwp_input_method_context_v1_send_preferred_language(
input_method->context->resource, language);
}
}
static const struct zwp_text_input_v1_interface text_input_implementation = {
text_input_activate,
text_input_deactivate,
text_input_show_input_panel,
text_input_hide_input_panel,
text_input_reset,
text_input_set_surrounding_text,
text_input_set_content_type,
text_input_set_cursor_rectangle,
text_input_set_preferred_language,
text_input_commit_state,
text_input_invoke_action
};
static void text_input_manager_create_text_input(struct wl_client *client,
struct wl_resource *resource,
uint32_t id)
{
struct text_input_manager *text_input_manager =
wl_resource_get_user_data(resource);
struct text_input *text_input;
text_input = zalloc(sizeof *text_input);
if (text_input == NULL)
return;
text_input->resource =
wl_resource_create(client, &zwp_text_input_v1_interface, 1, id);
wl_resource_set_implementation(text_input->resource,
&text_input_implementation,
text_input, destroy_text_input);
text_input->ec = text_input_manager->ec;
text_input->manager = text_input_manager;
wl_list_init(&text_input->input_methods);
};
static const struct zwp_text_input_manager_v1_interface manager_implementation = {
text_input_manager_create_text_input
};
static void
bind_text_input_manager(struct wl_client *client,
void *data,
uint32_t version,
uint32_t id)
{
struct text_input_manager *text_input_manager = data;
struct wl_resource *resource;
/* No checking for duplicate binding necessary. */
resource =
wl_resource_create(client,
&zwp_text_input_manager_v1_interface, 1, id);
if (resource)
wl_resource_set_implementation(resource,
&manager_implementation,
text_input_manager, NULL);
}
static void
text_input_manager_notifier_destroy(struct wl_listener *listener, void *data)
{
struct text_input_manager *text_input_manager =
container_of(listener,
struct text_input_manager,
destroy_listener);
wl_global_destroy(text_input_manager->text_input_manager_global);
free(text_input_manager);
}
static void
text_input_manager_create(struct weston_compositor *ec)
{
struct text_input_manager *text_input_manager;
text_input_manager = zalloc(sizeof *text_input_manager);
if (text_input_manager == NULL)
return;
text_input_manager->ec = ec;
text_input_manager->text_input_manager_global =
wl_global_create(ec->wl_display,
&zwp_text_input_manager_v1_interface, 1,
text_input_manager, bind_text_input_manager);
text_input_manager->destroy_listener.notify =
text_input_manager_notifier_destroy;
wl_signal_add(&ec->destroy_signal,
&text_input_manager->destroy_listener);
}
static void
input_method_context_destroy(struct wl_client *client,
struct wl_resource *resource)
{
wl_resource_destroy(resource);
}
static void
input_method_context_commit_string(struct wl_client *client,
struct wl_resource *resource,
uint32_t serial,
const char *text)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
if (context->input)
zwp_text_input_v1_send_commit_string(context->input->resource,
serial, text);
}
static void
input_method_context_preedit_string(struct wl_client *client,
struct wl_resource *resource,
uint32_t serial,
const char *text,
const char *commit)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
if (context->input)
zwp_text_input_v1_send_preedit_string(context->input->resource,
serial, text, commit);
}
static void
input_method_context_preedit_styling(struct wl_client *client,
struct wl_resource *resource,
uint32_t index,
uint32_t length,
uint32_t style)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
if (context->input)
zwp_text_input_v1_send_preedit_styling(context->input->resource,
index, length, style);
}
static void
input_method_context_preedit_cursor(struct wl_client *client,
struct wl_resource *resource,
int32_t cursor)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
if (context->input)
zwp_text_input_v1_send_preedit_cursor(context->input->resource,
cursor);
}
static void
input_method_context_delete_surrounding_text(struct wl_client *client,
struct wl_resource *resource,
int32_t index,
uint32_t length)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
if (context->input)
zwp_text_input_v1_send_delete_surrounding_text(
context->input->resource, index, length);
}
static void
input_method_context_cursor_position(struct wl_client *client,
struct wl_resource *resource,
int32_t index,
int32_t anchor)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
if (context->input)
zwp_text_input_v1_send_cursor_position(context->input->resource,
index, anchor);
}
static void
input_method_context_modifiers_map(struct wl_client *client,
struct wl_resource *resource,
struct wl_array *map)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
if (context->input)
zwp_text_input_v1_send_modifiers_map(context->input->resource,
map);
}
static void
input_method_context_keysym(struct wl_client *client,
struct wl_resource *resource,
uint32_t serial,
uint32_t time,
uint32_t sym,
uint32_t state,
uint32_t modifiers)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
if (context->input)
zwp_text_input_v1_send_keysym(context->input->resource,
serial, time,
sym, state, modifiers);
}
static void
unbind_keyboard(struct wl_resource *resource)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
input_method_context_end_keyboard_grab(context);
context->keyboard = NULL;
}
static void
input_method_context_grab_key(struct weston_keyboard_grab *grab,
uint32_t time, uint32_t key, uint32_t state_w)
{
struct weston_keyboard *keyboard = grab->keyboard;
struct wl_display *display;
uint32_t serial;
if (!keyboard->input_method_resource)
return;
display = wl_client_get_display(
wl_resource_get_client(keyboard->input_method_resource));
serial = wl_display_next_serial(display);
wl_keyboard_send_key(keyboard->input_method_resource,
serial, time, key, state_w);
}
static void
input_method_context_grab_modifier(struct weston_keyboard_grab *grab,
uint32_t serial,
uint32_t mods_depressed,
uint32_t mods_latched,
uint32_t mods_locked,
uint32_t group)
{
struct weston_keyboard *keyboard = grab->keyboard;
if (!keyboard->input_method_resource)
return;
wl_keyboard_send_modifiers(keyboard->input_method_resource,
serial, mods_depressed, mods_latched,
mods_locked, group);
}
static void
input_method_context_grab_cancel(struct weston_keyboard_grab *grab)
{
weston_keyboard_end_grab(grab->keyboard);
}
static const struct weston_keyboard_grab_interface input_method_context_grab = {
input_method_context_grab_key,
input_method_context_grab_modifier,
input_method_context_grab_cancel,
};
static void
input_method_context_grab_keyboard(struct wl_client *client,
struct wl_resource *resource,
uint32_t id)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
struct wl_resource *cr;
struct weston_seat *seat = context->input_method->seat;
struct weston_keyboard *keyboard = weston_seat_get_keyboard(seat);
cr = wl_resource_create(client, &wl_keyboard_interface, 1, id);
wl_resource_set_implementation(cr, NULL, context, unbind_keyboard);
context->keyboard = cr;
wl_keyboard_send_keymap(cr, WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1,
keyboard->xkb_info->keymap_fd,
keyboard->xkb_info->keymap_size);
if (keyboard->grab != &keyboard->default_grab) {
weston_keyboard_end_grab(keyboard);
}
weston_keyboard_start_grab(keyboard, &keyboard->input_method_grab);
keyboard->input_method_resource = cr;
}
static void
input_method_context_key(struct wl_client *client,
struct wl_resource *resource,
uint32_t serial,
uint32_t time,
uint32_t key,
uint32_t state_w)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
struct weston_seat *seat = context->input_method->seat;
struct weston_keyboard *keyboard = weston_seat_get_keyboard(seat);
struct weston_keyboard_grab *default_grab = &keyboard->default_grab;
default_grab->interface->key(default_grab, time, key, state_w);
}
static void
input_method_context_modifiers(struct wl_client *client,
struct wl_resource *resource,
uint32_t serial,
uint32_t mods_depressed,
uint32_t mods_latched,
uint32_t mods_locked,
uint32_t group)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
struct weston_seat *seat = context->input_method->seat;
struct weston_keyboard *keyboard = weston_seat_get_keyboard(seat);
struct weston_keyboard_grab *default_grab = &keyboard->default_grab;
default_grab->interface->modifiers(default_grab,
serial, mods_depressed,
mods_latched, mods_locked,
group);
}
static void
input_method_context_language(struct wl_client *client,
struct wl_resource *resource,
uint32_t serial,
const char *language)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
if (context->input)
zwp_text_input_v1_send_language(context->input->resource,
serial, language);
}
static void
input_method_context_text_direction(struct wl_client *client,
struct wl_resource *resource,
uint32_t serial,
uint32_t direction)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
if (context->input)
zwp_text_input_v1_send_text_direction(context->input->resource,
serial, direction);
}
static const struct zwp_input_method_context_v1_interface context_implementation = {
input_method_context_destroy,
input_method_context_commit_string,
input_method_context_preedit_string,
input_method_context_preedit_styling,
input_method_context_preedit_cursor,
input_method_context_delete_surrounding_text,
input_method_context_cursor_position,
input_method_context_modifiers_map,
input_method_context_keysym,
input_method_context_grab_keyboard,
input_method_context_key,
input_method_context_modifiers,
input_method_context_language,
input_method_context_text_direction
};
static void
destroy_input_method_context(struct wl_resource *resource)
{
struct input_method_context *context =
wl_resource_get_user_data(resource);
if (context->keyboard)
wl_resource_destroy(context->keyboard);
if (context->input_method && context->input_method->context == context)
context->input_method->context = NULL;
free(context);
}
static void
input_method_context_create(struct text_input *input,
struct input_method *input_method)
{
struct input_method_context *context;
struct wl_resource *binding;
if (!input_method->input_method_binding)
return;
context = zalloc(sizeof *context);
if (context == NULL)
return;
binding = input_method->input_method_binding;
context->resource =
wl_resource_create(wl_resource_get_client(binding),
&zwp_input_method_context_v1_interface,
1, 0);
wl_resource_set_implementation(context->resource,
&context_implementation,
context, destroy_input_method_context);
context->input = input;
context->input_method = input_method;
input_method->context = context;
zwp_input_method_v1_send_activate(binding, context->resource);
}
static void
input_method_context_end_keyboard_grab(struct input_method_context *context)
{
struct weston_keyboard_grab *grab;
struct weston_keyboard *keyboard;
keyboard = weston_seat_get_keyboard(context->input_method->seat);
if (!keyboard)
return;
grab = &keyboard->input_method_grab;
keyboard = grab->keyboard;
if (!keyboard)
return;
if (keyboard->grab == grab)
weston_keyboard_end_grab(keyboard);
keyboard->input_method_resource = NULL;
}
static void
unbind_input_method(struct wl_resource *resource)
{
struct input_method *input_method = wl_resource_get_user_data(resource);
input_method->input_method_binding = NULL;
input_method->context = NULL;
}
static void
bind_input_method(struct wl_client *client,
void *data,
uint32_t version,
uint32_t id)
{
struct input_method *input_method = data;
struct text_backend *text_backend = input_method->text_backend;
struct wl_resource *resource;
resource =
wl_resource_create(client,
&zwp_input_method_v1_interface, 1, id);
if (input_method->input_method_binding != NULL) {
wl_resource_post_error(resource,
WL_DISPLAY_ERROR_INVALID_OBJECT,
"interface object already bound");
return;
}
if (text_backend->input_method.client != client) {
wl_resource_post_error(resource,
WL_DISPLAY_ERROR_INVALID_OBJECT,
"permission to bind "
"input_method denied");
return;
}
wl_resource_set_implementation(resource, NULL, input_method,
unbind_input_method);
input_method->input_method_binding = resource;
}
static void
input_method_notifier_destroy(struct wl_listener *listener, void *data)
{
struct input_method *input_method =
container_of(listener, struct input_method, destroy_listener);
if (input_method->input)
deactivate_input_method(input_method);
wl_global_destroy(input_method->input_method_global);
wl_list_remove(&input_method->destroy_listener.link);
free(input_method);
}
static void
handle_keyboard_focus(struct wl_listener *listener, void *data)
{
struct weston_keyboard *keyboard = data;
struct input_method *input_method =
container_of(listener, struct input_method,
keyboard_focus_listener);
struct weston_surface *surface = keyboard->focus;
if (!input_method->input)
return;
if (!surface || input_method->input->surface != surface)
deactivate_input_method(input_method);
}
static void
input_method_init_seat(struct weston_seat *seat)
{
struct weston_keyboard *keyboard = weston_seat_get_keyboard(seat);
if (seat->input_method->focus_listener_initialized)
return;
if (keyboard) {
seat->input_method->keyboard_focus_listener.notify =
handle_keyboard_focus;
wl_signal_add(&keyboard->focus_signal,
&seat->input_method->keyboard_focus_listener);
keyboard->input_method_grab.interface =
&input_method_context_grab;
}
seat->input_method->focus_listener_initialized = true;
}
static void launch_input_method(struct text_backend *text_backend);
static void
respawn_input_method_process(struct text_backend *text_backend)
{
uint32_t time;
/* if input_method dies more than 5 times in 10 seconds, give up */
time = weston_compositor_get_time();
if (time - text_backend->input_method.deathstamp > 10000) {
text_backend->input_method.deathstamp = time;
text_backend->input_method.deathcount = 0;
}
text_backend->input_method.deathcount++;
if (text_backend->input_method.deathcount > 5) {
weston_log("input_method disconnected, giving up.\n");
return;
}
weston_log("input_method disconnected, respawning...\n");
launch_input_method(text_backend);
}
static void
input_method_client_notifier(struct wl_listener *listener, void *data)
{
struct text_backend *text_backend;
text_backend = container_of(listener, struct text_backend,
client_listener);
text_backend->input_method.client = NULL;
respawn_input_method_process(text_backend);
}
static void
launch_input_method(struct text_backend *text_backend)
{
if (!text_backend->input_method.path)
return;
if (strcmp(text_backend->input_method.path, "") == 0)
return;
text_backend->input_method.client =
weston_client_start(text_backend->compositor,
text_backend->input_method.path);
if (!text_backend->input_method.client) {
weston_log("not able to start %s\n",
text_backend->input_method.path);
return;
}
text_backend->client_listener.notify = input_method_client_notifier;
wl_client_add_destroy_listener(text_backend->input_method.client,
&text_backend->client_listener);
}
static void
text_backend_seat_created(struct text_backend *text_backend,
struct weston_seat *seat)
{
struct input_method *input_method;
struct weston_compositor *ec = seat->compositor;
input_method = zalloc(sizeof *input_method);
if (input_method == NULL)
return;
input_method->seat = seat;
input_method->input = NULL;
input_method->focus_listener_initialized = false;
input_method->context = NULL;
input_method->text_backend = text_backend;
input_method->input_method_global =
wl_global_create(ec->wl_display,
&zwp_input_method_v1_interface, 1,
input_method, bind_input_method);
input_method->destroy_listener.notify = input_method_notifier_destroy;
wl_signal_add(&seat->destroy_signal, &input_method->destroy_listener);
seat->input_method = input_method;
}
static void
handle_seat_created(struct wl_listener *listener, void *data)
{
struct weston_seat *seat = data;
struct text_backend *text_backend =
container_of(listener, struct text_backend,
seat_created_listener);
text_backend_seat_created(text_backend, seat);
}
static void
text_backend_configuration(struct text_backend *text_backend)
{
struct weston_config *config = wet_get_config(text_backend->compositor);
struct weston_config_section *section;
char *client;
int ret;
section = weston_config_get_section(config,
"input-method", NULL, NULL);
ret = asprintf(&client, "%s/weston-keyboard",
weston_config_get_libexec_dir());
if (ret < 0)
client = NULL;
weston_config_section_get_string(section, "path",
&text_backend->input_method.path,
client);
free(client);
}
WL_EXPORT void
text_backend_destroy(struct text_backend *text_backend)
{
if (text_backend->input_method.client) {
/* disable respawn */
wl_list_remove(&text_backend->client_listener.link);
wl_client_destroy(text_backend->input_method.client);
}
free(text_backend->input_method.path);
free(text_backend);
}
WL_EXPORT struct text_backend *
text_backend_init(struct weston_compositor *ec)
{
struct text_backend *text_backend;
struct weston_seat *seat;
text_backend = zalloc(sizeof(*text_backend));
if (text_backend == NULL)
return NULL;
text_backend->compositor = ec;
text_backend_configuration(text_backend);
wl_list_for_each(seat, &ec->seat_list, link)
text_backend_seat_created(text_backend, seat);
text_backend->seat_created_listener.notify = handle_seat_created;
wl_signal_add(&ec->seat_created_signal,
&text_backend->seat_created_listener);
text_input_manager_create(ec);
launch_input_method(text_backend);
return text_backend;
}