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weston/libweston/clipboard.c

308 lines
7.6 KiB

/*
* 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 <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <linux/input.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/uio.h>
#include <libweston/libweston.h>
#include "libweston-internal.h"
#include "shared/helpers.h"
struct clipboard_source {
struct weston_data_source base;
struct wl_array contents;
struct clipboard *clipboard;
struct wl_event_source *event_source;
uint32_t serial;
int refcount;
int fd;
};
struct clipboard {
struct weston_seat *seat;
struct wl_listener selection_listener;
struct wl_listener destroy_listener;
struct clipboard_source *source;
};
static void clipboard_client_create(struct clipboard_source *source, int fd);
static void
clipboard_source_unref(struct clipboard_source *source)
{
char **s;
source->refcount--;
if (source->refcount > 0)
return;
if (source->event_source) {
wl_event_source_remove(source->event_source);
close(source->fd);
}
wl_signal_emit(&source->base.destroy_signal,
&source->base);
s = source->base.mime_types.data;
free(*s);
wl_array_release(&source->base.mime_types);
wl_array_release(&source->contents);
free(source);
}
static int
clipboard_source_data(int fd, uint32_t mask, void *data)
{
struct clipboard_source *source = data;
struct clipboard *clipboard = source->clipboard;
char *p;
int len, size;
if (source->contents.alloc - source->contents.size < 1024) {
wl_array_add(&source->contents, 1024);
source->contents.size -= 1024;
}
p = source->contents.data + source->contents.size;
size = source->contents.alloc - source->contents.size;
len = read(fd, p, size);
if (len == 0) {
wl_event_source_remove(source->event_source);
close(fd);
source->event_source = NULL;
} else if (len < 0) {
clipboard_source_unref(source);
clipboard->source = NULL;
} else {
source->contents.size += len;
}
return 1;
}
static void
clipboard_source_accept(struct weston_data_source *source,
uint32_t serial, const char *mime_type)
{
}
static void
clipboard_source_send(struct weston_data_source *base,
const char *mime_type, int32_t fd)
{
struct clipboard_source *source =
container_of(base, struct clipboard_source, base);
char **s;
s = source->base.mime_types.data;
if (strcmp(mime_type, s[0]) == 0)
clipboard_client_create(source, fd);
else
close(fd);
}
static void
clipboard_source_cancel(struct weston_data_source *source)
{
}
static struct clipboard_source *
clipboard_source_create(struct clipboard *clipboard,
const char *mime_type, uint32_t serial, int fd)
{
struct wl_display *display = clipboard->seat->compositor->wl_display;
struct wl_event_loop *loop = wl_display_get_event_loop(display);
struct clipboard_source *source;
char **s;
source = zalloc(sizeof *source);
if (source == NULL)
return NULL;
wl_array_init(&source->contents);
wl_array_init(&source->base.mime_types);
source->base.resource = NULL;
source->base.accept = clipboard_source_accept;
source->base.send = clipboard_source_send;
source->base.cancel = clipboard_source_cancel;
wl_signal_init(&source->base.destroy_signal);
source->refcount = 1;
source->clipboard = clipboard;
source->serial = serial;
source->fd = fd;
s = wl_array_add(&source->base.mime_types, sizeof *s);
if (s == NULL)
goto err_add;
*s = strdup(mime_type);
if (*s == NULL)
goto err_strdup;
source->event_source =
wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
clipboard_source_data, source);
if (source->event_source == NULL)
goto err_source;
return source;
err_source:
free(*s);
err_strdup:
wl_array_release(&source->base.mime_types);
err_add:
free(source);
return NULL;
}
struct clipboard_client {
struct wl_event_source *event_source;
size_t offset;
struct clipboard_source *source;
};
static int
clipboard_client_data(int fd, uint32_t mask, void *data)
{
struct clipboard_client *client = data;
char *p;
size_t size;
int len;
size = client->source->contents.size;
p = client->source->contents.data;
len = write(fd, p + client->offset, size - client->offset);
if (len > 0)
client->offset += len;
if (client->offset == size || len <= 0) {
close(fd);
wl_event_source_remove(client->event_source);
clipboard_source_unref(client->source);
free(client);
}
return 1;
}
static void
clipboard_client_create(struct clipboard_source *source, int fd)
{
struct weston_seat *seat = source->clipboard->seat;
struct clipboard_client *client;
struct wl_event_loop *loop =
wl_display_get_event_loop(seat->compositor->wl_display);
client = zalloc(sizeof *client);
if (client == NULL)
return;
client->source = source;
source->refcount++;
client->event_source =
wl_event_loop_add_fd(loop, fd, WL_EVENT_WRITABLE,
clipboard_client_data, client);
}
static void
clipboard_set_selection(struct wl_listener *listener, void *data)
{
struct clipboard *clipboard =
container_of(listener, struct clipboard, selection_listener);
struct weston_seat *seat = data;
struct weston_data_source *source = seat->selection_data_source;
const char **mime_types;
int p[2];
if (source == NULL) {
if (clipboard->source)
weston_seat_set_selection(seat,
&clipboard->source->base,
clipboard->source->serial);
return;
} else if (source->accept == clipboard_source_accept) {
/* Callback for our data source. */
return;
}
if (clipboard->source)
clipboard_source_unref(clipboard->source);
clipboard->source = NULL;
mime_types = source->mime_types.data;
if (!mime_types || pipe2(p, O_CLOEXEC) == -1)
return;
source->send(source, mime_types[0], p[1]);
clipboard->source =
clipboard_source_create(clipboard, mime_types[0],
seat->selection_serial, p[0]);
if (clipboard->source == NULL) {
close(p[0]);
return;
}
}
static void
clipboard_destroy(struct wl_listener *listener, void *data)
{
struct clipboard *clipboard =
container_of(listener, struct clipboard, destroy_listener);
wl_list_remove(&clipboard->selection_listener.link);
wl_list_remove(&clipboard->destroy_listener.link);
free(clipboard);
}
struct clipboard *
clipboard_create(struct weston_seat *seat)
{
struct clipboard *clipboard;
clipboard = zalloc(sizeof *clipboard);
if (clipboard == NULL)
return NULL;
clipboard->seat = seat;
clipboard->selection_listener.notify = clipboard_set_selection;
clipboard->destroy_listener.notify = clipboard_destroy;
wl_signal_add(&seat->selection_signal,
&clipboard->selection_listener);
wl_signal_add(&seat->destroy_signal,
&clipboard->destroy_listener);
return clipboard;
}