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selection: make text_from_{clipboard,primary} async

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This commit is contained in:
Daniel Eklöf 2019-11-05 09:09:51 +01:00
parent dd57418494
commit b17358bd0a
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GPG key ID: 5BBD4992C116573F
1 changed files with 84 additions and 61 deletions
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145
selection.c
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@ -563,6 +563,83 @@ selection_to_clipboard(struct terminal *term, uint32_t serial)
free(text);
}
struct clipboard_receive {
/* Callback data */
void (*cb)(const char *data, size_t size, void *user);
void (*done)(void *user);
void *user;
};
static bool
fdm_receive(struct fdm *fdm, int fd, int events, void *data)
{
struct clipboard_receive *ctx = data;
if ((events & EPOLLHUP) && !(events & EPOLLIN))
goto done;
/* Read until EOF */
while (true) {
char text[256];
ssize_t count = read(fd, text, sizeof(text));
if (count == -1) {
if (errno == EAGAIN || errno == EWOULDBLOCK)
return true;
LOG_ERRNO("failed to read clipboard data");
break;
}
if (count == 0)
break;
/* Replace \r\n with \n */
for (size_t i = 0; i < count - 1; i++) {
if (text[i] == '\r' && text[i + 1] == '\n') {
memmove(&text[i], &text[i + 1], count - i - 1);
count--;
}
}
ctx->cb(text, count, ctx->user);
}
done:
fdm_del(fdm, fd);
ctx->done(ctx->user);
free(ctx);
return true;
}
static void
begin_receive_clipboard(struct terminal *term, int read_fd,
void (*cb)(const char *data, size_t size, void *user),
void (*done)(void *user), void *user)
{
int flags;
if ((flags = fcntl(read_fd, F_GETFL)) < 0 ||
fcntl(read_fd, F_SETFL, flags | O_NONBLOCK) < 0)
{
LOG_ERRNO("failed to set O_NONBLOCK");
close(read_fd);
return done(user);
}
struct clipboard_receive *ctx = malloc(sizeof(*ctx));
*ctx = (struct clipboard_receive) {
.cb = cb,
.done = done,
.user = user,
};
if (!fdm_add(term->fdm, read_fd, EPOLLIN, &fdm_receive, ctx)) {
close(read_fd);
free(ctx);
done(user);
}
}
void
text_from_clipboard(struct terminal *term, uint32_t serial,
void (*cb)(const char *data, size_t size, void *user),
@ -570,13 +647,13 @@ text_from_clipboard(struct terminal *term, uint32_t serial,
{
struct wl_clipboard *clipboard = &term->wl->clipboard;
if (clipboard->data_offer == NULL)
goto done;
return done(user);
/* Prepare a pipe the other client can write its selection to us */
int fds[2];
if (pipe2(fds, O_CLOEXEC) == -1) {
LOG_ERRNO("failed to create pipe");
goto done;
return done(user);
}
int read_fd = fds[0];
@ -590,34 +667,7 @@ text_from_clipboard(struct terminal *term, uint32_t serial,
/* Don't keep our copy of the write-end open (or we'll never get EOF) */
close(write_fd);
/* Read until EOF */
while (true) {
char text[256];
ssize_t amount = read(read_fd, text, sizeof(text));
if (amount == -1) {
LOG_ERRNO("failed to read clipboard data: %d", errno);
break;
} else if (amount == 0)
break;
/* Replace \r\n with \n */
for (size_t i = 0; i < amount - 1; i++) {
if (text[i] == '\r' && text[i + 1] == '\n') {
memmove(&text[i], &text[i + 1], amount - i - 1);
amount--;
}
}
if (cb != NULL)
cb(text, amount, user);
}
close(read_fd);
done:
if (done != NULL)
done(user);
begin_receive_clipboard(term, read_fd, cb, done, user);
}
static void
@ -713,17 +763,17 @@ text_from_primary(
void (*done)(void *user), void *user)
{
if (term->wl->primary_selection_device_manager == NULL)
goto done;
return done(user);
struct wl_primary *primary = &term->wl->primary;
if (primary->data_offer == NULL)
goto done;
return done(user);
/* Prepare a pipe the other client can write its selection to us */
int fds[2];
if (pipe2(fds, O_CLOEXEC) == -1) {
LOG_ERRNO("failed to create pipe");
goto done;
return done(user);
}
int read_fd = fds[0];
@ -737,34 +787,7 @@ text_from_primary(
/* Don't keep our copy of the write-end open (or we'll never get EOF) */
close(write_fd);
/* Read until EOF */
while (true) {
char text[256];
ssize_t amount = read(read_fd, text, sizeof(text));
if (amount == -1) {
LOG_ERRNO("failed to read clipboard data: %d", errno);
break;
} else if (amount == 0)
break;
/* Replace \r\n with \n */
for (size_t i = 0; i < amount - 1; i++) {
if (text[i] == '\r' && text[i + 1] == '\n') {
memmove(&text[i], &text[i + 1], amount - i - 1);
amount--;
}
}
if (cb != NULL)
cb(text, amount, user);
}
close(read_fd);
done:
if (done != NULL)
done(user);
begin_receive_clipboard(term, read_fd, cb, done, user);
}
void