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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/ozone/platform/wayland/host/wayland_data_source.h"
#include <gtk-primary-selection-client-protocol.h>
#include <primary-selection-unstable-v1-client-protocol.h>
#include <cstdint>
#include <vector>
#include "base/files/file_util.h"
#include "base/logging.h"
#include "ui/base/dragdrop/drag_drop_types.h"
#include "ui/events/base_event_utils.h"
#include "ui/ozone/platform/wayland/host/wayland_connection.h"
namespace wl {
template <typename T>
DataSource<T>::DataSource(T* data_source,
ui::WaylandConnection* connection,
Delegate* delegate)
: data_source_(data_source), connection_(connection), delegate_(delegate) {
DCHECK(data_source_);
DCHECK(connection_);
DCHECK(delegate_);
Initialize();
VLOG(1) << "DataSoure created:" << this;
}
template <typename T>
DataSource<T>::~DataSource() {
VLOG(1) << "DataSoure deleted:" << this;
}
template <typename T>
void DataSource<T>::HandleDropEvent() {
VLOG(1) << "OnDataSourceDropPerformed in WaylandDataSource";
// No timestamp for these events. Use EventTimeForNow(), for now.
delegate_->OnDataSourceDropPerformed(this, ui::EventTimeForNow());
}
template <typename T>
void DataSource<T>::HandleFinishEvent(bool completed) {
VLOG(1) << "OnDataSourceFinish in WaylandDataSource";
// No timestamp for these events. Use EventTimeForNow(), for now.
delegate_->OnDataSourceFinish(this, ui::EventTimeForNow(), completed);
}
// Writes |data_str| to file descriptor |fd| assuming it is flagged as
// O_NONBLOCK, which implies in handling EAGAIN, besides EINTR. Returns true
// iff data is fully written to the given file descriptor. See the link below
// for more details about non-blocking behavior for 'write' syscall.
// https://pubs.opengroup.org/onlinepubs/007904975/functions/write.html
bool WriteDataNonBlocking(int fd, const std::string& data_str) {
const auto data_span = base::as_byte_span(data_str);
for (size_t written = 0; written < data_span.size();) {
const auto remaining_span = data_span.subspan(written);
const ssize_t result =
write(fd, remaining_span.data(), remaining_span.size());
if (result >= 0) {
written += static_cast<size_t>(result);
} else if (errno != EINTR && errno != EAGAIN) {
return false;
}
}
return true;
}
template <typename T>
void DataSource<T>::HandleSendEvent(const std::string& mime_type, int32_t fd) {
std::string contents;
delegate_->OnDataSourceSend(this, mime_type, &contents);
bool done = WriteDataNonBlocking(fd, contents);
VPLOG_IF(1, !done) << "Failed to write";
close(fd);
}
// static
template <typename T>
void DataSource<T>::OnSend(void* data,
T* source,
const char* mime_type,
int32_t fd) {
auto* self = static_cast<DataSource<T>*>(data);
self->HandleSendEvent(mime_type, fd);
}
template <typename T>
void DataSource<T>::OnCancelled(void* data, T* source) {
auto* self = static_cast<DataSource<T>*>(data);
self->HandleFinishEvent(/*completed=*/false);
}
template <typename T>
void DataSource<T>::OnDndFinished(void* data, T* source) {
auto* self = static_cast<DataSource<T>*>(data);
self->HandleFinishEvent(/*completed=*/true);
}
template <typename T>
void DataSource<T>::OnAction(void* data, T* source, uint32_t dnd_action) {
auto* self = static_cast<DataSource<T>*>(data);
self->dnd_action_ = dnd_action;
}
template <typename T>
void DataSource<T>::OnTarget(void* data, T* source, const char* mime_type) {
NOTIMPLEMENTED_LOG_ONCE();
}
template <typename T>
void DataSource<T>::OnDndDropPerformed(void* data, T* source) {
auto* self = static_cast<DataSource<T>*>(data);
self->HandleDropEvent();
}
//////////////////////////////////////////////////////////////////////////////
// wl_data_source specializations and instantiation
//////////////////////////////////////////////////////////////////////////////
template <>
void DataSource<wl_data_source>::Initialize() {
static constexpr wl_data_source_listener kDataSourceListener = {
.target = &OnTarget,
.send = &OnSend,
.cancelled = &OnCancelled,
.dnd_drop_performed = &OnDndDropPerformed,
.dnd_finished = &OnDndFinished,
.action = &OnAction};
wl_data_source_add_listener(data_source_.get(), &kDataSourceListener, this);
}
template <>
void DataSource<wl_data_source>::Offer(
const std::vector<std::string>& mime_types) {
for (auto& mime_type : mime_types)
wl_data_source_offer(data_source_.get(), mime_type.c_str());
connection_->Flush();
}
template <typename T>
void DataSource<T>::SetDndActions(uint32_t dnd_actions) {
NOTIMPLEMENTED_LOG_ONCE();
}
template <>
void DataSource<wl_data_source>::SetDndActions(uint32_t dnd_actions) {
if (wl::get_version_of_object(data_source_.get()) >=
WL_DATA_SOURCE_SET_ACTIONS_SINCE_VERSION) {
wl_data_source_set_actions(data_source_.get(), dnd_actions);
}
}
template class DataSource<wl_data_source>;
//////////////////////////////////////////////////////////////////////////////
// gtk_primary_selection_source specializations and instantiation
//////////////////////////////////////////////////////////////////////////////
template <>
void DataSource<gtk_primary_selection_source>::Initialize() {
static constexpr gtk_primary_selection_source_listener kDataSourceListener = {
.send = &OnSend, .cancelled = &OnCancelled};
gtk_primary_selection_source_add_listener(data_source_.get(),
&kDataSourceListener, this);
}
template <>
void DataSource<gtk_primary_selection_source>::Offer(
const std::vector<std::string>& mime_types) {
for (const auto& mime_type : mime_types)
gtk_primary_selection_source_offer(data_source_.get(), mime_type.c_str());
connection_->Flush();
}
template <>
void DataSource<zwp_primary_selection_source_v1>::Initialize() {
static constexpr zwp_primary_selection_source_v1_listener
kDataSourceListener = {
.send = DataSource<zwp_primary_selection_source_v1>::OnSend,
.cancelled =
DataSource<zwp_primary_selection_source_v1>::OnCancelled};
zwp_primary_selection_source_v1_add_listener(data_source_.get(),
&kDataSourceListener, this);
}
template <>
void DataSource<zwp_primary_selection_source_v1>::Offer(
const std::vector<std::string>& mime_types) {
for (const auto& mime_type : mime_types)
zwp_primary_selection_source_v1_offer(data_source_.get(),
mime_type.c_str());
connection_->Flush();
}
template class DataSource<gtk_primary_selection_source>;
template class DataSource<zwp_primary_selection_source_v1>;
} // namespace wl
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