556 lines
22 KiB
C++
556 lines
22 KiB
C++
// Copyright 2018 The ChromiumOS Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "sommelier.h" // NOLINT(build/include_directory)
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#include "sommelier-transform.h" // NOLINT(build/include_directory)
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <wayland-client.h>
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struct sl_host_data_device_manager {
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struct sl_context* ctx;
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struct wl_resource* resource;
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struct wl_data_device_manager* proxy;
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};
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struct sl_host_data_device {
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struct sl_context* ctx;
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struct wl_resource* resource;
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struct wl_data_device* proxy;
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struct sl_host_surface* focus_surface;
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};
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MAP_STRUCTS(wl_data_device, sl_host_data_device);
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struct sl_host_data_source {
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struct wl_resource* resource;
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struct wl_data_source* proxy;
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};
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MAP_STRUCTS(wl_data_source, sl_host_data_source);
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struct sl_host_data_offer {
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struct sl_context* ctx;
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struct wl_resource* resource;
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struct wl_data_offer* proxy;
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};
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MAP_STRUCTS(wl_data_offer, sl_host_data_offer);
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struct sl_data_transfer {
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int read_fd;
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int write_fd;
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size_t offset;
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size_t bytes_left;
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uint8_t data[DEFAULT_BUFFER_SIZE];
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std::unique_ptr<struct wl_event_source> read_event_source;
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std::unique_ptr<struct wl_event_source> write_event_source;
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};
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static void sl_data_transfer_destroy(struct sl_data_transfer* transfer) {
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int read_fd = transfer->read_fd;
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int write_fd = transfer->write_fd;
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// default deleter of wl_event_source removes the sources from their
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// associated wl_event_loop, but we still want to close the fd. Ordered this
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// way because we don't want any additional events associated with the close()
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// calls to end up a the wl_event_loop.
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delete transfer;
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close(read_fd);
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close(write_fd);
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}
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static int sl_handle_data_transfer_read(int fd, uint32_t mask, void* data) {
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struct sl_data_transfer* transfer = (struct sl_data_transfer*)data;
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if ((mask & WL_EVENT_READABLE) == 0) {
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assert(mask & (WL_EVENT_HANGUP | WL_EVENT_ERROR));
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// Epoll (and therefore wl_event_loop) will notify listeners of errors and
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// hangups even if all other events are disabled. Therefore, at this point,
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// we don't know whether we didn't get a readable event because the fd has
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// been exhausted, or because we aren't in the reading state and weren't
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// listening for one. We can make the distinction be checking if there's any
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// data left in the buffer. If there is, then we are just waiting for the
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// writing to finish, otherwise end the transfer.
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// In the case of an error, where there is not likely to be any more data to
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// read, we still want to wait for any data we did get to be written out.
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if (!transfer->bytes_left) {
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sl_data_transfer_destroy(transfer);
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}
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return 0;
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}
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// At this point we must be in the reading state.
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assert(!transfer->bytes_left);
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transfer->bytes_left =
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read(transfer->read_fd, transfer->data, sizeof(transfer->data));
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if (transfer->bytes_left > 0) {
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transfer->offset = 0;
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// There may still be data to read from the event source, but we have no
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// room in our buffer so move to the writing state.
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wl_event_source_fd_update(transfer->read_event_source.get(), 0);
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wl_event_source_fd_update(transfer->write_event_source.get(),
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WL_EVENT_WRITABLE);
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} else {
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// On a read error or EOF, end the transfer.
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sl_data_transfer_destroy(transfer);
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}
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return 0;
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}
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static int sl_handle_data_transfer_write(int fd, uint32_t mask, void* data) {
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struct sl_data_transfer* transfer = (struct sl_data_transfer*)data;
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int rv;
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// If we receive a HANGUP or ERROR event on the write source then there is no
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// point in continuing the transfer. We could still read more data, but we
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// couldn't send it to the recipient, so just destroy the transfer now.
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if ((mask & WL_EVENT_WRITABLE) == 0) {
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assert(mask & (WL_EVENT_HANGUP | WL_EVENT_ERROR));
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sl_data_transfer_destroy(transfer);
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return 0;
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}
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// At this point we must be in the writing state.
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assert(transfer->bytes_left);
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rv = write(transfer->write_fd, transfer->data + transfer->offset,
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transfer->bytes_left);
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if (rv < 0) {
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// On a write error, end the transfer.
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sl_data_transfer_destroy(transfer);
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} else {
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assert(rv <= static_cast<int>(transfer->bytes_left));
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transfer->bytes_left -= rv;
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transfer->offset += rv;
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}
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if (!transfer->bytes_left) {
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// If all data has been written, move back to the reading state.
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wl_event_source_fd_update(transfer->write_event_source.get(), 0);
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wl_event_source_fd_update(transfer->read_event_source.get(),
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WL_EVENT_READABLE);
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}
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// If there is still data left, continue in the writing state.
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return 0;
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}
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static void sl_data_transfer_create(struct wl_event_loop* event_loop,
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int read_fd,
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int write_fd) {
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int flags;
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int rv;
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flags = fcntl(write_fd, F_GETFL, 0);
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rv = fcntl(write_fd, F_SETFL, flags | O_NONBLOCK);
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assert(!rv);
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UNUSED(rv);
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// Start out the transfer in the reading state.
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struct sl_data_transfer* transfer = new sl_data_transfer;
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assert(transfer);
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transfer->read_fd = read_fd;
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transfer->write_fd = write_fd;
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transfer->offset = 0;
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transfer->bytes_left = 0;
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memset(transfer->data, 0, DEFAULT_BUFFER_SIZE);
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transfer->read_event_source.reset(
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wl_event_loop_add_fd(event_loop, read_fd, WL_EVENT_READABLE,
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sl_handle_data_transfer_read, transfer));
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transfer->write_event_source.reset(wl_event_loop_add_fd(
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event_loop, write_fd, 0, sl_handle_data_transfer_write, transfer));
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}
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static void sl_data_offer_receive(struct wl_client* client,
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struct wl_resource* resource,
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const char* mime_type,
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int32_t fd) {
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struct sl_host_data_offer* host =
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static_cast<sl_host_data_offer*>(wl_resource_get_user_data(resource));
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if (host->ctx->channel == NULL) {
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// Running in noop mode, without virtualization.
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wl_data_offer_receive(host->proxy, mime_type, fd);
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close(fd);
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return;
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}
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int pipe_fd, rv;
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rv = host->ctx->channel->create_pipe(pipe_fd);
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if (rv) {
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fprintf(stderr, "error: failed to create virtwl pipe: %s\n", strerror(-rv));
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close(fd);
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return;
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}
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sl_data_transfer_create(wl_display_get_event_loop(host->ctx->host_display),
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pipe_fd, fd);
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wl_data_offer_receive(host->proxy, mime_type, pipe_fd);
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}
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static void sl_data_offer_destroy(struct wl_client* client,
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struct wl_resource* resource) {
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wl_resource_destroy(resource);
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}
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static const struct wl_data_offer_interface sl_data_offer_implementation = {
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ForwardRequest<wl_data_offer_accept>, sl_data_offer_receive,
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sl_data_offer_destroy, ForwardRequest<wl_data_offer_finish>,
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ForwardRequest<wl_data_offer_set_actions>};
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static void sl_data_offer_offer(void* data,
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struct wl_data_offer* data_offer,
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const char* mime_type) {
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struct sl_host_data_offer* host =
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static_cast<sl_host_data_offer*>(wl_data_offer_get_user_data(data_offer));
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wl_data_offer_send_offer(host->resource, mime_type);
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}
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static void sl_data_offer_source_actions(void* data,
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struct wl_data_offer* data_offer,
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uint32_t source_actions) {
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struct sl_host_data_offer* host =
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static_cast<sl_host_data_offer*>(wl_data_offer_get_user_data(data_offer));
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wl_data_offer_send_source_actions(host->resource, source_actions);
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}
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static void sl_data_offer_action(void* data,
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struct wl_data_offer* data_offer,
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uint32_t dnd_action) {
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struct sl_host_data_offer* host =
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static_cast<sl_host_data_offer*>(wl_data_offer_get_user_data(data_offer));
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wl_data_offer_send_action(host->resource, dnd_action);
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}
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static const struct wl_data_offer_listener sl_data_offer_listener = {
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sl_data_offer_offer, sl_data_offer_source_actions, sl_data_offer_action};
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static void sl_destroy_host_data_offer(struct wl_resource* resource) {
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struct sl_host_data_offer* host =
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static_cast<sl_host_data_offer*>(wl_resource_get_user_data(resource));
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wl_data_offer_destroy(host->proxy);
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wl_resource_set_user_data(resource, NULL);
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delete host;
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}
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static void sl_data_source_destroy(struct wl_client* client,
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struct wl_resource* resource) {
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wl_resource_destroy(resource);
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}
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static const struct wl_data_source_interface sl_data_source_implementation = {
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ForwardRequest<wl_data_source_offer>, sl_data_source_destroy,
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ForwardRequest<wl_data_source_set_actions>};
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static void sl_data_source_target(void* data,
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struct wl_data_source* data_source,
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const char* mime_type) {
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struct sl_host_data_source* host = static_cast<sl_host_data_source*>(
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wl_data_source_get_user_data(data_source));
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wl_data_source_send_target(host->resource, mime_type);
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}
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static void sl_data_source_send(void* data,
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struct wl_data_source* data_source,
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const char* mime_type,
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int32_t fd) {
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struct sl_host_data_source* host = static_cast<sl_host_data_source*>(
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wl_data_source_get_user_data(data_source));
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wl_data_source_send_send(host->resource, mime_type, fd);
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close(fd);
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}
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static void sl_data_source_cancelled(void* data,
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struct wl_data_source* data_source) {
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struct sl_host_data_source* host = static_cast<sl_host_data_source*>(
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wl_data_source_get_user_data(data_source));
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wl_data_source_send_cancelled(host->resource);
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}
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void sl_data_source_dnd_drop_performed(void* data,
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struct wl_data_source* data_source) {
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struct sl_host_data_source* host = static_cast<sl_host_data_source*>(
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wl_data_source_get_user_data(data_source));
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wl_data_source_send_dnd_drop_performed(host->resource);
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}
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void sl_data_source_dnd_finished(void* data,
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struct wl_data_source* data_source) {
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struct sl_host_data_source* host = static_cast<sl_host_data_source*>(
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wl_data_source_get_user_data(data_source));
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wl_data_source_send_dnd_finished(host->resource);
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}
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void sl_data_source_actions(void* data,
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struct wl_data_source* data_source,
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uint32_t dnd_action) {
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struct sl_host_data_source* host = static_cast<sl_host_data_source*>(
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wl_data_source_get_user_data(data_source));
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wl_data_source_send_action(host->resource, dnd_action);
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}
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static const struct wl_data_source_listener sl_data_source_listener = {
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sl_data_source_target, sl_data_source_send,
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sl_data_source_cancelled, sl_data_source_dnd_drop_performed,
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sl_data_source_dnd_finished, sl_data_source_actions};
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static void sl_destroy_host_data_source(struct wl_resource* resource) {
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struct sl_host_data_source* host =
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static_cast<sl_host_data_source*>(wl_resource_get_user_data(resource));
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wl_data_source_destroy(host->proxy);
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wl_resource_set_user_data(resource, NULL);
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delete host;
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}
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static void sl_data_device_start_drag(struct wl_client* client,
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struct wl_resource* resource,
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struct wl_resource* source_resource,
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struct wl_resource* origin_resource,
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struct wl_resource* icon_resource,
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uint32_t serial) {
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struct sl_host_data_device* host =
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static_cast<sl_host_data_device*>(wl_resource_get_user_data(resource));
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struct sl_host_data_source* host_source =
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source_resource ? static_cast<sl_host_data_source*>(
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wl_resource_get_user_data(source_resource))
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: NULL;
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struct sl_host_surface* host_origin =
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origin_resource ? static_cast<sl_host_surface*>(
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wl_resource_get_user_data(origin_resource))
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: NULL;
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struct sl_host_surface* host_icon =
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icon_resource ? static_cast<sl_host_surface*>(
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wl_resource_get_user_data(icon_resource))
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: NULL;
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host_icon->has_role = 1;
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wl_data_device_start_drag(host->proxy,
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host_source ? host_source->proxy : NULL,
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host_origin ? host_origin->proxy : NULL,
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host_icon ? host_icon->proxy : NULL, serial);
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} // NOLINT(whitespace/indent)
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static void sl_data_device_release(struct wl_client* client,
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struct wl_resource* resource) {
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wl_resource_destroy(resource);
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} // NOLINT(whitespace/indent)
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static const struct wl_data_device_interface sl_data_device_implementation = {
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sl_data_device_start_drag,
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ForwardRequest<wl_data_device_set_selection, AllowNullResource::kYes>,
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sl_data_device_release};
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static void sl_data_device_data_offer(void* data,
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struct wl_data_device* data_device,
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struct wl_data_offer* data_offer) {
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struct sl_host_data_device* host = static_cast<sl_host_data_device*>(
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wl_data_device_get_user_data(data_device));
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struct sl_host_data_offer* host_data_offer = new sl_host_data_offer();
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host_data_offer->ctx = host->ctx;
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host_data_offer->resource = wl_resource_create(
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wl_resource_get_client(host->resource), &wl_data_offer_interface,
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wl_resource_get_version(host->resource), 0);
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wl_resource_set_implementation(host_data_offer->resource,
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&sl_data_offer_implementation, host_data_offer,
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sl_destroy_host_data_offer);
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host_data_offer->proxy = data_offer;
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wl_data_offer_add_listener(host_data_offer->proxy, &sl_data_offer_listener,
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host_data_offer);
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wl_data_device_send_data_offer(host->resource, host_data_offer->resource);
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}
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static void sl_data_device_enter(void* data,
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struct wl_data_device* data_device,
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uint32_t serial,
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struct wl_surface* surface,
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wl_fixed_t x,
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wl_fixed_t y,
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struct wl_data_offer* data_offer) {
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struct sl_host_data_device* host = static_cast<sl_host_data_device*>(
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wl_data_device_get_user_data(data_device));
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struct sl_host_surface* host_surface =
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static_cast<sl_host_surface*>(wl_surface_get_user_data(surface));
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struct sl_host_data_offer* host_data_offer =
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static_cast<sl_host_data_offer*>(wl_data_offer_get_user_data(data_offer));
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wl_fixed_t ix = x, iy = y;
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sl_transform_host_to_guest_fixed(host->ctx, host_surface, &ix, &iy);
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host->focus_surface = host_surface;
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wl_data_device_send_enter(host->resource, serial, host_surface->resource, ix,
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iy, host_data_offer->resource);
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} // NOLINT(whitespace/indent)
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static void sl_data_device_leave(void* data,
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struct wl_data_device* data_device) {
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struct sl_host_data_device* host = static_cast<sl_host_data_device*>(
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wl_data_device_get_user_data(data_device));
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host->focus_surface = NULL;
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wl_data_device_send_leave(host->resource);
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}
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static void sl_data_device_motion(void* data,
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struct wl_data_device* data_device,
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uint32_t time,
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wl_fixed_t x,
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wl_fixed_t y) {
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struct sl_host_data_device* host = static_cast<sl_host_data_device*>(
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wl_data_device_get_user_data(data_device));
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wl_fixed_t ix = x, iy = y;
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sl_transform_host_to_guest_fixed(host->ctx, host->focus_surface, &ix, &iy);
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wl_data_device_send_motion(host->resource, time, ix, iy);
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}
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static void sl_data_device_drop(void* data,
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struct wl_data_device* data_device) {
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struct sl_host_data_device* host = static_cast<sl_host_data_device*>(
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wl_data_device_get_user_data(data_device));
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host->focus_surface = NULL;
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wl_data_device_send_drop(host->resource);
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}
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static void sl_data_device_selection(void* data,
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struct wl_data_device* data_device,
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struct wl_data_offer* data_offer) {
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struct sl_host_data_device* host = static_cast<sl_host_data_device*>(
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wl_data_device_get_user_data(data_device));
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struct wl_resource* data_offer_resource =
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data_offer ? static_cast<sl_host_data_offer*>(
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wl_data_offer_get_user_data(data_offer))
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->resource
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: nullptr;
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wl_data_device_send_selection(host->resource, data_offer_resource);
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}
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static const struct wl_data_device_listener sl_data_device_listener = {
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sl_data_device_data_offer, sl_data_device_enter, sl_data_device_leave,
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sl_data_device_motion, sl_data_device_drop, sl_data_device_selection};
|
|
|
|
static void sl_destroy_host_data_device(struct wl_resource* resource) {
|
|
struct sl_host_data_device* host =
|
|
static_cast<sl_host_data_device*>(wl_resource_get_user_data(resource));
|
|
|
|
if (wl_data_device_get_version(host->proxy) >=
|
|
WL_DATA_DEVICE_RELEASE_SINCE_VERSION) {
|
|
wl_data_device_release(host->proxy);
|
|
} else {
|
|
wl_data_device_destroy(host->proxy);
|
|
}
|
|
wl_resource_set_user_data(resource, NULL);
|
|
delete host;
|
|
}
|
|
|
|
static void sl_data_device_manager_create_data_source(
|
|
struct wl_client* client, struct wl_resource* resource, uint32_t id) {
|
|
struct sl_host_data_device_manager* host =
|
|
static_cast<sl_host_data_device_manager*>(
|
|
wl_resource_get_user_data(resource));
|
|
struct sl_host_data_source* host_data_source = new sl_host_data_source();
|
|
|
|
host_data_source->resource = wl_resource_create(
|
|
client, &wl_data_source_interface, wl_resource_get_version(resource), id);
|
|
wl_resource_set_implementation(host_data_source->resource,
|
|
&sl_data_source_implementation,
|
|
host_data_source, sl_destroy_host_data_source);
|
|
host_data_source->proxy =
|
|
wl_data_device_manager_create_data_source(host->proxy);
|
|
wl_data_source_add_listener(host_data_source->proxy, &sl_data_source_listener,
|
|
host_data_source);
|
|
}
|
|
|
|
static void sl_data_device_manager_get_data_device(
|
|
struct wl_client* client,
|
|
struct wl_resource* resource,
|
|
uint32_t id,
|
|
struct wl_resource* seat_resource) {
|
|
struct sl_host_data_device_manager* host =
|
|
static_cast<sl_host_data_device_manager*>(
|
|
wl_resource_get_user_data(resource));
|
|
struct sl_host_seat* host_seat =
|
|
static_cast<sl_host_seat*>(wl_resource_get_user_data(seat_resource));
|
|
struct sl_host_data_device* host_data_device = new sl_host_data_device();
|
|
|
|
host_data_device->ctx = host->ctx;
|
|
host_data_device->focus_surface = NULL;
|
|
host_data_device->resource = wl_resource_create(
|
|
client, &wl_data_device_interface, wl_resource_get_version(resource), id);
|
|
wl_resource_set_implementation(host_data_device->resource,
|
|
&sl_data_device_implementation,
|
|
host_data_device, sl_destroy_host_data_device);
|
|
host_data_device->proxy =
|
|
wl_data_device_manager_get_data_device(host->proxy, host_seat->proxy);
|
|
wl_data_device_add_listener(host_data_device->proxy, &sl_data_device_listener,
|
|
host_data_device);
|
|
} // NOLINT(whitespace/indent)
|
|
|
|
static const struct wl_data_device_manager_interface
|
|
sl_data_device_manager_implementation = {
|
|
sl_data_device_manager_create_data_source,
|
|
sl_data_device_manager_get_data_device};
|
|
|
|
static void sl_destroy_host_data_device_manager(struct wl_resource* resource) {
|
|
struct sl_host_data_device_manager* host =
|
|
static_cast<sl_host_data_device_manager*>(
|
|
wl_resource_get_user_data(resource));
|
|
|
|
wl_data_device_manager_destroy(host->proxy);
|
|
wl_resource_set_user_data(resource, NULL);
|
|
delete host;
|
|
}
|
|
|
|
static void sl_bind_host_data_device_manager(struct wl_client* client,
|
|
void* data,
|
|
uint32_t version,
|
|
uint32_t id) {
|
|
struct sl_context* ctx = (struct sl_context*)data;
|
|
struct sl_host_data_device_manager* host = new sl_host_data_device_manager();
|
|
host->ctx = ctx;
|
|
host->resource =
|
|
wl_resource_create(client, &wl_data_device_manager_interface,
|
|
MIN(version, ctx->data_device_manager->version), id);
|
|
wl_resource_set_implementation(host->resource,
|
|
&sl_data_device_manager_implementation, host,
|
|
sl_destroy_host_data_device_manager);
|
|
host->proxy = static_cast<wl_data_device_manager*>(wl_registry_bind(
|
|
wl_display_get_registry(ctx->display), ctx->data_device_manager->id,
|
|
&wl_data_device_manager_interface, ctx->data_device_manager->version));
|
|
wl_data_device_manager_set_user_data(host->proxy, host);
|
|
}
|
|
|
|
struct sl_global* sl_data_device_manager_global_create(struct sl_context* ctx) {
|
|
return sl_global_create(ctx, &wl_data_device_manager_interface,
|
|
ctx->data_device_manager->version, ctx,
|
|
sl_bind_host_data_device_manager);
|
|
}
|