mirror of
https://github.com/gnif/LookingGlass.git
synced 2024-12-23 14:03:40 +00:00
596 lines
14 KiB
C
596 lines
14 KiB
C
/**
|
|
* Looking Glass
|
|
* Copyright © 2017-2021 The Looking Glass Authors
|
|
* https://looking-glass.io
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc., 59
|
|
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include "wayland.h"
|
|
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <sys/epoll.h>
|
|
#include <unistd.h>
|
|
#include <wayland-client.h>
|
|
|
|
#include "app.h"
|
|
#include "common/debug.h"
|
|
|
|
struct DataOffer {
|
|
bool isSelfCopy;
|
|
char * mimetypes[LG_CLIPBOARD_DATA_NONE];
|
|
};
|
|
|
|
static const char * textMimetypes[] =
|
|
{
|
|
"text/plain",
|
|
"text/plain;charset=utf-8",
|
|
"TEXT",
|
|
"STRING",
|
|
"UTF8_STRING",
|
|
NULL,
|
|
};
|
|
|
|
static const char * pngMimetypes[] =
|
|
{
|
|
"image/png",
|
|
NULL,
|
|
};
|
|
|
|
static const char * bmpMimetypes[] =
|
|
{
|
|
"image/bmp",
|
|
"image/x-bmp",
|
|
"image/x-MS-bmp",
|
|
"image/x-win-bitmap",
|
|
NULL,
|
|
};
|
|
|
|
static const char * tiffMimetypes[] =
|
|
{
|
|
"image/tiff",
|
|
NULL,
|
|
};
|
|
|
|
static const char * jpegMimetypes[] =
|
|
{
|
|
"image/jpeg",
|
|
NULL,
|
|
};
|
|
|
|
static const char ** cbTypeToMimetypes(enum LG_ClipboardData type)
|
|
{
|
|
switch (type)
|
|
{
|
|
case LG_CLIPBOARD_DATA_TEXT:
|
|
return textMimetypes;
|
|
case LG_CLIPBOARD_DATA_PNG:
|
|
return pngMimetypes;
|
|
case LG_CLIPBOARD_DATA_BMP:
|
|
return bmpMimetypes;
|
|
case LG_CLIPBOARD_DATA_TIFF:
|
|
return tiffMimetypes;
|
|
case LG_CLIPBOARD_DATA_JPEG:
|
|
return jpegMimetypes;
|
|
default:
|
|
DEBUG_ERROR("invalid clipboard type");
|
|
abort();
|
|
}
|
|
}
|
|
|
|
static bool containsMimetype(const char ** mimetypes,
|
|
const char * needle)
|
|
{
|
|
for (const char ** mimetype = mimetypes; *mimetype; mimetype++)
|
|
if (!strcmp(needle, *mimetype))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool mimetypeEndswith(const char * mimetype, const char * what)
|
|
{
|
|
size_t mimetypeLen = strlen(mimetype);
|
|
size_t whatLen = strlen(what);
|
|
|
|
if (mimetypeLen < whatLen)
|
|
return false;
|
|
|
|
return !strcmp(mimetype + mimetypeLen - whatLen, what);
|
|
}
|
|
|
|
static bool isTextMimetype(const char * mimetype)
|
|
{
|
|
if (containsMimetype(textMimetypes, mimetype))
|
|
return true;
|
|
|
|
if (!strcmp(mimetype, "text/ico"))
|
|
return false;
|
|
|
|
char * text = "text/";
|
|
if (!strncmp(mimetype, text, strlen(text)))
|
|
return true;
|
|
|
|
if (mimetypeEndswith(mimetype, "script") ||
|
|
mimetypeEndswith(mimetype, "xml") ||
|
|
mimetypeEndswith(mimetype, "yaml"))
|
|
return true;
|
|
|
|
if (strstr(mimetype, "json"))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static enum LG_ClipboardData mimetypeToCbType(const char * mimetype)
|
|
{
|
|
if (isTextMimetype(mimetype))
|
|
return LG_CLIPBOARD_DATA_TEXT;
|
|
|
|
if (containsMimetype(pngMimetypes, mimetype))
|
|
return LG_CLIPBOARD_DATA_PNG;
|
|
|
|
if (containsMimetype(bmpMimetypes, mimetype))
|
|
return LG_CLIPBOARD_DATA_BMP;
|
|
|
|
if (containsMimetype(tiffMimetypes, mimetype))
|
|
return LG_CLIPBOARD_DATA_TIFF;
|
|
|
|
if (containsMimetype(jpegMimetypes, mimetype))
|
|
return LG_CLIPBOARD_DATA_JPEG;
|
|
|
|
return LG_CLIPBOARD_DATA_NONE;
|
|
}
|
|
|
|
static bool isImageCbtype(enum LG_ClipboardData type)
|
|
{
|
|
switch (type)
|
|
{
|
|
case LG_CLIPBOARD_DATA_TEXT:
|
|
return false;
|
|
case LG_CLIPBOARD_DATA_PNG:
|
|
case LG_CLIPBOARD_DATA_BMP:
|
|
case LG_CLIPBOARD_DATA_TIFF:
|
|
case LG_CLIPBOARD_DATA_JPEG:
|
|
return true;
|
|
default:
|
|
DEBUG_ERROR("invalid clipboard type");
|
|
abort();
|
|
}
|
|
}
|
|
|
|
static bool hasAnyMimetype(char ** mimetypes)
|
|
{
|
|
for (enum LG_ClipboardData i = 0; i < LG_CLIPBOARD_DATA_NONE; ++i)
|
|
if (mimetypes[i])
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static bool hasImageMimetype(char ** mimetypes)
|
|
{
|
|
for (enum LG_ClipboardData i = 0; i < LG_CLIPBOARD_DATA_NONE; ++i)
|
|
if (isImageCbtype(i) && mimetypes[i])
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
// Destination client handlers.
|
|
|
|
static void dataOfferHandleOffer(void * opaque, struct wl_data_offer * offer,
|
|
const char * mimetype)
|
|
{
|
|
struct DataOffer * data = opaque;
|
|
|
|
if (!strcmp(mimetype, wlCb.lgMimetype))
|
|
{
|
|
data->isSelfCopy = true;
|
|
return;
|
|
}
|
|
|
|
enum LG_ClipboardData type = mimetypeToCbType(mimetype);
|
|
|
|
if (type == LG_CLIPBOARD_DATA_NONE)
|
|
return;
|
|
|
|
// text/html represents rich text format, which is almost never desirable when
|
|
// and should not be used when a plain text or image format is available.
|
|
if ((isImageCbtype(type) || containsMimetype(textMimetypes, mimetype)) &&
|
|
data->mimetypes[LG_CLIPBOARD_DATA_TEXT] &&
|
|
strstr(data->mimetypes[LG_CLIPBOARD_DATA_TEXT], "html"))
|
|
{
|
|
free(data->mimetypes[LG_CLIPBOARD_DATA_TEXT]);
|
|
data->mimetypes[LG_CLIPBOARD_DATA_TEXT] = NULL;
|
|
}
|
|
|
|
if (strstr(mimetype, "html") && hasImageMimetype(data->mimetypes))
|
|
return;
|
|
|
|
if (data->mimetypes[type])
|
|
return;
|
|
|
|
data->mimetypes[type] = strdup(mimetype);
|
|
}
|
|
|
|
static void dataOfferHandleSourceActions(void * data,
|
|
struct wl_data_offer * offer, uint32_t sourceActions)
|
|
{
|
|
// Do nothing.
|
|
}
|
|
|
|
static void dataOfferHandleAction(void * data, struct wl_data_offer * offer,
|
|
uint32_t dndAction)
|
|
{
|
|
// Do nothing.
|
|
}
|
|
|
|
static const struct wl_data_offer_listener dataOfferListener = {
|
|
.offer = dataOfferHandleOffer,
|
|
.source_actions = dataOfferHandleSourceActions,
|
|
.action = dataOfferHandleAction,
|
|
};
|
|
|
|
static void dataDeviceHandleDataOffer(void * data,
|
|
struct wl_data_device * dataDevice, struct wl_data_offer * offer)
|
|
{
|
|
struct DataOffer * extra = calloc(1, sizeof(struct DataOffer));
|
|
if (!extra)
|
|
{
|
|
DEBUG_ERROR("Out of memory while handling clipboard");
|
|
abort();
|
|
}
|
|
wl_data_offer_set_user_data(offer, extra);
|
|
wl_data_offer_add_listener(offer, &dataOfferListener, extra);
|
|
}
|
|
|
|
static void dataDeviceHandleSelection(void * opaque,
|
|
struct wl_data_device * dataDevice, struct wl_data_offer * offer)
|
|
{
|
|
if (!offer)
|
|
{
|
|
waylandCBInvalidate();
|
|
return;
|
|
}
|
|
|
|
struct DataOffer * extra = wl_data_offer_get_user_data(offer);
|
|
if (!hasAnyMimetype(extra->mimetypes) || extra->isSelfCopy)
|
|
{
|
|
waylandCBInvalidate();
|
|
wl_data_offer_destroy(offer);
|
|
return;
|
|
}
|
|
|
|
wlCb.offer = offer;
|
|
|
|
for (enum LG_ClipboardData i = 0; i < LG_CLIPBOARD_DATA_NONE; ++i)
|
|
free(wlCb.mimetypes[i]);
|
|
memcpy(wlCb.mimetypes, extra->mimetypes, sizeof(wlCb.mimetypes));
|
|
|
|
wl_data_offer_set_user_data(offer, NULL);
|
|
free(extra);
|
|
|
|
int idx = 0;
|
|
enum LG_ClipboardData types[LG_CLIPBOARD_DATA_NONE];
|
|
for (enum LG_ClipboardData i = 0; i < LG_CLIPBOARD_DATA_NONE; ++i)
|
|
if (wlCb.mimetypes[i])
|
|
types[idx++] = i;
|
|
|
|
app_clipboardNotifyTypes(types, idx);
|
|
}
|
|
|
|
static void dataDeviceHandleEnter(void * data, struct wl_data_device * device,
|
|
uint32_t serial, struct wl_surface * surface, wl_fixed_t sxW, wl_fixed_t syW,
|
|
struct wl_data_offer * offer)
|
|
{
|
|
DEBUG_ASSERT(wlCb.dndOffer == NULL);
|
|
wlCb.dndOffer = offer;
|
|
|
|
struct DataOffer * extra = wl_data_offer_get_user_data(offer);
|
|
for (enum LG_ClipboardData i = 0; i < LG_CLIPBOARD_DATA_NONE; ++i)
|
|
free(extra->mimetypes[i]);
|
|
free(extra);
|
|
|
|
wl_data_offer_set_user_data(offer, NULL);
|
|
wl_data_offer_set_actions(offer, WL_DATA_DEVICE_MANAGER_DND_ACTION_NONE,
|
|
WL_DATA_DEVICE_MANAGER_DND_ACTION_NONE);
|
|
}
|
|
|
|
static void dataDeviceHandleMotion(void * data, struct wl_data_device * device,
|
|
uint32_t time, wl_fixed_t sxW, wl_fixed_t syW)
|
|
{
|
|
// Do nothing.
|
|
}
|
|
|
|
static void dataDeviceHandleLeave(void * data, struct wl_data_device * device)
|
|
{
|
|
wl_data_offer_destroy(wlCb.dndOffer);
|
|
wlCb.dndOffer = NULL;
|
|
}
|
|
|
|
static void dataDeviceHandleDrop(void * data, struct wl_data_device * device)
|
|
{
|
|
wl_data_offer_destroy(wlCb.dndOffer);
|
|
wlCb.dndOffer = NULL;
|
|
}
|
|
|
|
static const struct wl_data_device_listener dataDeviceListener = {
|
|
.data_offer = dataDeviceHandleDataOffer,
|
|
.selection = dataDeviceHandleSelection,
|
|
.enter = dataDeviceHandleEnter,
|
|
.motion = dataDeviceHandleMotion,
|
|
.leave = dataDeviceHandleLeave,
|
|
.drop = dataDeviceHandleDrop,
|
|
};
|
|
|
|
bool waylandCBInit(void)
|
|
{
|
|
memset(&wlCb, 0, sizeof(wlCb));
|
|
|
|
if (!wlWm.dataDeviceManager)
|
|
{
|
|
DEBUG_ERROR("Missing wl_data_device_manager interface (version 3+)");
|
|
return false;
|
|
}
|
|
|
|
wlCb.dataDevice = wl_data_device_manager_get_data_device(
|
|
wlWm.dataDeviceManager, wlWm.seat);
|
|
if (!wlCb.dataDevice)
|
|
{
|
|
DEBUG_ERROR("Failed to get data device");
|
|
return false;
|
|
}
|
|
|
|
wl_data_device_add_listener(wlCb.dataDevice, &dataDeviceListener, NULL);
|
|
|
|
snprintf(wlCb.lgMimetype, sizeof(wlCb.lgMimetype),
|
|
"application/x-looking-glass-copy;pid=%d", getpid());
|
|
|
|
return true;
|
|
}
|
|
|
|
static void clipboardReadCancel(struct ClipboardRead * data)
|
|
{
|
|
waylandPollUnregister(data->fd);
|
|
close(data->fd);
|
|
free(data->buf);
|
|
free(data);
|
|
wlCb.currentRead = NULL;
|
|
}
|
|
|
|
static void clipboardReadCallback(uint32_t events, void * opaque)
|
|
{
|
|
struct ClipboardRead * data = opaque;
|
|
if (events & EPOLLERR)
|
|
{
|
|
clipboardReadCancel(data);
|
|
return;
|
|
}
|
|
|
|
ssize_t result = read(data->fd, data->buf + data->numRead, data->size - data->numRead);
|
|
if (result < 0)
|
|
{
|
|
DEBUG_ERROR("Failed to read from clipboard: %s", strerror(errno));
|
|
clipboardReadCancel(data);
|
|
return;
|
|
}
|
|
|
|
if (result == 0)
|
|
{
|
|
app_clipboardNotifySize(data->type, data->numRead);
|
|
app_clipboardData(data->type, data->buf, data->numRead);
|
|
clipboardReadCancel(data);
|
|
return;
|
|
}
|
|
|
|
data->numRead += result;
|
|
if (data->numRead >= data->size)
|
|
{
|
|
data->size *= 2;
|
|
void * nbuf = realloc(data->buf, data->size);
|
|
if (!nbuf) {
|
|
DEBUG_ERROR("Failed to realloc clipboard buffer: %s", strerror(errno));
|
|
clipboardReadCancel(data);
|
|
return;
|
|
}
|
|
|
|
data->buf = nbuf;
|
|
}
|
|
}
|
|
|
|
void waylandCBInvalidate(void)
|
|
{
|
|
if (wlCb.currentRead)
|
|
clipboardReadCancel(wlCb.currentRead);
|
|
|
|
app_clipboardRelease();
|
|
|
|
if (wlCb.offer)
|
|
wl_data_offer_destroy(wlCb.offer);
|
|
wlCb.offer = NULL;
|
|
}
|
|
|
|
void waylandCBRequest(LG_ClipboardData type)
|
|
{
|
|
if (!wlCb.offer || !wlCb.mimetypes[type])
|
|
{
|
|
app_clipboardRelease();
|
|
return;
|
|
}
|
|
|
|
if (wlCb.currentRead)
|
|
clipboardReadCancel(wlCb.currentRead);
|
|
|
|
int fds[2];
|
|
if (pipe(fds) < 0)
|
|
{
|
|
DEBUG_ERROR("Failed to get a clipboard pipe: %s", strerror(errno));
|
|
abort();
|
|
}
|
|
|
|
wl_data_offer_receive(wlCb.offer, wlCb.mimetypes[type], fds[1]);
|
|
close(fds[1]);
|
|
|
|
struct ClipboardRead * data = malloc(sizeof(*data));
|
|
if (!data)
|
|
{
|
|
DEBUG_ERROR("Failed to allocate memory to read clipboard");
|
|
close(fds[0]);
|
|
return;
|
|
}
|
|
|
|
data->fd = fds[0];
|
|
data->size = 4096;
|
|
data->numRead = 0;
|
|
data->buf = malloc(data->size);
|
|
data->offer = wlCb.offer;
|
|
data->type = type;
|
|
|
|
if (!data->buf)
|
|
{
|
|
DEBUG_ERROR("Failed to allocate memory to receive clipboard data");
|
|
close(data->fd);
|
|
free(data);
|
|
return;
|
|
}
|
|
|
|
if (!waylandPollRegister(data->fd, clipboardReadCallback, data, EPOLLIN))
|
|
{
|
|
DEBUG_ERROR("Failed to register clipboard read into epoll: %s", strerror(errno));
|
|
close(data->fd);
|
|
free(data->buf);
|
|
free(data);
|
|
}
|
|
|
|
wlCb.currentRead = data;
|
|
}
|
|
|
|
struct ClipboardWrite
|
|
{
|
|
int fd;
|
|
size_t pos;
|
|
struct CountedBuffer * buffer;
|
|
};
|
|
|
|
static void clipboardWriteCallback(uint32_t events, void * opaque)
|
|
{
|
|
struct ClipboardWrite * data = opaque;
|
|
if (events & EPOLLERR)
|
|
goto error;
|
|
|
|
ssize_t written = write(data->fd, data->buffer->data + data->pos, data->buffer->size - data->pos);
|
|
if (written < 0)
|
|
{
|
|
if (errno != EPIPE)
|
|
DEBUG_ERROR("Failed to write clipboard data: %s", strerror(errno));
|
|
goto error;
|
|
}
|
|
|
|
data->pos += written;
|
|
if (data->pos < data->buffer->size)
|
|
return;
|
|
|
|
error:
|
|
waylandPollUnregister(data->fd);
|
|
close(data->fd);
|
|
countedBufferRelease(&data->buffer);
|
|
free(data);
|
|
}
|
|
|
|
static void dataSourceHandleSend(void * data, struct wl_data_source * source,
|
|
const char * mimetype, int fd)
|
|
{
|
|
struct WCBTransfer * transfer = (struct WCBTransfer *) data;
|
|
if (containsMimetype(transfer->mimetypes, mimetype))
|
|
{
|
|
struct ClipboardWrite * data = malloc(sizeof(*data));
|
|
if (!data)
|
|
{
|
|
DEBUG_ERROR("Out of memory trying to allocate ClipboardWrite");
|
|
goto error;
|
|
}
|
|
|
|
data->fd = fd;
|
|
data->pos = 0;
|
|
data->buffer = transfer->data;
|
|
countedBufferAddRef(transfer->data);
|
|
waylandPollRegister(fd, clipboardWriteCallback, data, EPOLLOUT);
|
|
return;
|
|
}
|
|
|
|
error:
|
|
close(fd);
|
|
}
|
|
|
|
static void dataSourceHandleCancelled(void * data,
|
|
struct wl_data_source * source)
|
|
{
|
|
struct WCBTransfer * transfer = (struct WCBTransfer *) data;
|
|
countedBufferRelease(&transfer->data);
|
|
free(transfer);
|
|
wl_data_source_destroy(source);
|
|
}
|
|
|
|
static const struct wl_data_source_listener dataSourceListener = {
|
|
.send = dataSourceHandleSend,
|
|
.cancelled = dataSourceHandleCancelled,
|
|
};
|
|
|
|
static void waylandCBReplyFn(void * opaque, LG_ClipboardData type,
|
|
uint8_t * data, uint32_t size)
|
|
{
|
|
struct WCBTransfer * transfer = malloc(sizeof(*transfer));
|
|
if (!transfer)
|
|
{
|
|
DEBUG_ERROR("Out of memory when allocating WCBTransfer");
|
|
return;
|
|
}
|
|
|
|
transfer->mimetypes = cbTypeToMimetypes(type);
|
|
transfer->data = countedBufferNew(size);
|
|
if (!transfer->data)
|
|
{
|
|
DEBUG_ERROR("Out of memory when allocating clipboard buffer");
|
|
free(transfer);
|
|
return;
|
|
}
|
|
memcpy(transfer->data->data, data, size);
|
|
|
|
struct wl_data_source * source =
|
|
wl_data_device_manager_create_data_source(wlWm.dataDeviceManager);
|
|
wl_data_source_add_listener(source, &dataSourceListener, transfer);
|
|
for (const char ** mimetype = transfer->mimetypes; *mimetype; mimetype++)
|
|
wl_data_source_offer(source, *mimetype);
|
|
wl_data_source_offer(source, wlCb.lgMimetype);
|
|
|
|
wl_data_device_set_selection(wlCb.dataDevice, source,
|
|
wlWm.keyboardEnterSerial);
|
|
}
|
|
|
|
void waylandCBNotice(LG_ClipboardData type)
|
|
{
|
|
wlCb.haveRequest = true;
|
|
wlCb.type = type;
|
|
app_clipboardRequest(waylandCBReplyFn, NULL);
|
|
}
|
|
|
|
void waylandCBRelease(void)
|
|
{
|
|
wlCb.haveRequest = false;
|
|
}
|