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/*
* Copyright (c) 2021, Kyle Pereira <kyle@xylepereira.me>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "SpiceAgent.h"
#include "ConnectionToClipboardServer.h"
#include <AK/DeprecatedString.h>
#include <LibGfx/BMPLoader.h>
#include <LibGfx/BMPWriter.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/JPGLoader.h>
#include <LibGfx/PNGLoader.h>
#include <LibGfx/PNGWriter.h>
#include <memory.h>
#include <unistd.h>
SpiceAgent::SpiceAgent(int fd, ConnectionToClipboardServer& connection)
: m_fd(fd)
, m_clipboard_connection(connection)
{
m_notifier = Core::Notifier::construct(fd, Core::Notifier::Read);
m_notifier->on_ready_to_read = [this] {
on_message_received();
};
m_clipboard_connection.on_data_changed = [this] {
if (m_just_set_clip) {
m_just_set_clip = false;
return;
}
auto mime = m_clipboard_connection.get_clipboard_data().mime_type();
Optional<ClipboardType> type = mime_type_to_clipboard_type(mime);
if (!type.has_value())
return;
auto grab_buffer = ClipboardGrab::make_buffer({ *type });
send_message(grab_buffer);
};
auto buffer = AnnounceCapabilities::make_buffer(true, { Capability::ClipboardByDemand });
send_message(buffer);
}
Optional<SpiceAgent::ClipboardType> SpiceAgent::mime_type_to_clipboard_type(DeprecatedString const& mime)
{
if (mime == "text/plain")
return ClipboardType::Text;
else if (mime == "image/jpeg")
return ClipboardType::JPG;
else if (mime == "image/bmp")
return ClipboardType::BMP;
else if (mime == "image/png" || mime == "image/x-serenityos")
return ClipboardType::PNG;
else
return {};
}
void SpiceAgent::on_message_received()
{
ChunkHeader header {};
read_n(&header, sizeof(header));
auto buffer = ByteBuffer::create_uninitialized(header.size).release_value_but_fixme_should_propagate_errors(); // FIXME: Handle possible OOM situation.
read_n(buffer.data(), buffer.size());
auto* message = reinterpret_cast<Message*>(buffer.data());
switch (message->type) {
case (u32)MessageType::AnnounceCapabilities: {
auto* capabilities_message = reinterpret_cast<AnnounceCapabilities*>(message->data);
if (capabilities_message->request) {
auto capabilities_buffer = AnnounceCapabilities::make_buffer(false, { Capability::ClipboardByDemand });
send_message(capabilities_buffer);
}
break;
}
case (u32)MessageType::ClipboardRequest: {
auto* request_message = reinterpret_cast<ClipboardRequest*>(message->data);
auto clipboard = m_clipboard_connection.get_clipboard_data();
auto& mime = clipboard.mime_type();
ByteBuffer backing_byte_buffer;
ReadonlyBytes bytes;
if (mime == "image/x-serenityos") {
auto bitmap = m_clipboard_connection.get_bitmap();
backing_byte_buffer = MUST(Gfx::PNGWriter::encode(*bitmap));
bytes = backing_byte_buffer;
} else {
auto data = clipboard.data();
bytes = { data.data<void>(), data.size() };
}
auto clipboard_buffer = Clipboard::make_buffer((ClipboardType)request_message->type, bytes);
send_message(clipboard_buffer);
break;
}
case (u32)MessageType::ClipboardGrab: {
auto* grab_message = reinterpret_cast<ClipboardGrab*>(message->data);
auto found_type = ClipboardType::None;
for (size_t i = 0; i < (message->size / 4); i++) {
auto type = (ClipboardType)grab_message->types[i];
if (found_type == ClipboardType::None) {
found_type = static_cast<ClipboardType>(type);
} else if (found_type == ClipboardType::Text) {
switch (type) {
case ClipboardType::PNG:
case ClipboardType::BMP:
case ClipboardType::JPG:
found_type = type;
break;
default:
break;
}
}
}
if (found_type == ClipboardType::None)
return;
auto request_buffer = ClipboardRequest::make_buffer(found_type);
send_message(request_buffer);
break;
}
case (u32)MessageType::Clipboard: {
auto* clipboard_message = reinterpret_cast<Clipboard*>(message->data);
auto type = (ClipboardType)clipboard_message->type;
auto data_buffer = ByteBuffer::create_uninitialized(message->size - sizeof(u32)).release_value_but_fixme_should_propagate_errors(); // FIXME: Handle possible OOM situation.
auto const total_bytes = message->size - sizeof(Clipboard);
auto bytes_copied = header.size - sizeof(Message) - sizeof(Clipboard);
memcpy(data_buffer.data(), clipboard_message->data, bytes_copied);
while (bytes_copied < total_bytes) {
ChunkHeader next_header;
read_n(&next_header, sizeof(ChunkHeader));
read_n(data_buffer.data() + bytes_copied, next_header.size);
bytes_copied += next_header.size;
}
m_just_set_clip = true;
if (type == ClipboardType::Text) {
auto anon_buffer_or_error = Core::AnonymousBuffer::create_with_size(data_buffer.size());
VERIFY(!anon_buffer_or_error.is_error());
auto anon_buffer = anon_buffer_or_error.release_value();
memcpy(anon_buffer.data<void>(), data_buffer.data(), data_buffer.size());
m_clipboard_connection.async_set_clipboard_data(anon_buffer, "text/plain", {});
return;
} else {
ErrorOr<Gfx::ImageFrameDescriptor> frame_or_error = Gfx::ImageFrameDescriptor {};
if (type == ClipboardType::PNG) {
frame_or_error = Gfx::PNGImageDecoderPlugin(data_buffer.data(), data_buffer.size()).frame(0);
} else if (type == ClipboardType::BMP) {
frame_or_error = Gfx::BMPImageDecoderPlugin(data_buffer.data(), data_buffer.size()).frame(0);
} else if (type == ClipboardType::JPG) {
frame_or_error = Gfx::JPGImageDecoderPlugin(data_buffer.data(), data_buffer.size()).frame(0);
} else {
dbgln("Unknown clipboard type: {}", (u32)type);
return;
}
auto const& bitmap = frame_or_error.value().image;
m_clipboard_connection.set_bitmap(*bitmap);
}
break;
}
default:
dbgln("Unhandled message type {}", message->type);
}
}
void SpiceAgent::read_n(void* dest, size_t n)
{
size_t bytes_read = 0;
while (bytes_read < n) {
int nread = read(m_fd, (u8*)dest + bytes_read, n - bytes_read);
if (nread > 0) {
bytes_read += nread;
} else if (errno == EAGAIN) {
continue;
} else {
dbgln("Failed to read: {}", errno);
return;
}
}
}
void SpiceAgent::send_message(ByteBuffer const& buffer)
{
size_t bytes_written = 0;
while (bytes_written < buffer.size()) {
int result = write(m_fd, buffer.data() + bytes_written, buffer.size() - bytes_written);
if (result < 0) {
dbgln("Failed to write: {}", errno);
return;
}
bytes_written += result;
}
}
SpiceAgent::Message* SpiceAgent::initialize_headers(u8* data, size_t additional_data_size, MessageType type)
{
new (data) ChunkHeader {
(u32)Port::Client,
(u32)(sizeof(Message) + additional_data_size)
};
auto* message = new (data + sizeof(ChunkHeader)) Message {
AGENT_PROTOCOL,
(u32)type,
0,
(u32)additional_data_size
};
return message;
}
ByteBuffer SpiceAgent::AnnounceCapabilities::make_buffer(bool request, Vector<Capability> const& capabilities)
{
size_t required_size = sizeof(ChunkHeader) + sizeof(Message) + sizeof(AnnounceCapabilities);
auto buffer = ByteBuffer::create_uninitialized(required_size).release_value_but_fixme_should_propagate_errors(); // FIXME: Handle possible OOM situation.
u8* data = buffer.data();
auto* message = initialize_headers(data, sizeof(AnnounceCapabilities), MessageType::AnnounceCapabilities);
auto* announce_message = new (message->data) AnnounceCapabilities {
request,
{}
};
for (auto& cap : capabilities) {
announce_message->caps[0] |= (1 << (u32)cap);
}
return buffer;
}
ByteBuffer SpiceAgent::ClipboardGrab::make_buffer(Vector<ClipboardType> const& types)
{
VERIFY(types.size() > 0);
size_t variable_data_size = sizeof(u32) * types.size();
size_t required_size = sizeof(ChunkHeader) + sizeof(Message) + variable_data_size;
auto buffer = ByteBuffer::create_uninitialized(required_size).release_value_but_fixme_should_propagate_errors(); // FIXME: Handle possible OOM situation.
u8* data = buffer.data();
auto* message = initialize_headers(data, variable_data_size, MessageType::ClipboardGrab);
auto* grab_message = new (message->data) ClipboardGrab {};
for (auto i = 0u; i < types.size(); i++) {
grab_message->types[i] = (u32)types[i];
}
return buffer;
}
ByteBuffer SpiceAgent::Clipboard::make_buffer(ClipboardType type, ReadonlyBytes contents)
{
size_t data_size = sizeof(Clipboard) + contents.size();
size_t required_size = sizeof(ChunkHeader) + sizeof(Message) + data_size;
auto buffer = ByteBuffer::create_uninitialized(required_size).release_value_but_fixme_should_propagate_errors(); // FIXME: Handle possible OOM situation.
u8* data = buffer.data();
auto* message = initialize_headers(data, data_size, MessageType::Clipboard);
auto* clipboard_message = new (message->data) Clipboard {
.type = (u32)type
};
memcpy(clipboard_message->data, contents.data(), contents.size());
return buffer;
}
ByteBuffer SpiceAgent::ClipboardRequest::make_buffer(ClipboardType type)
{
size_t data_size = sizeof(ClipboardRequest);
size_t required_size = sizeof(ChunkHeader) + sizeof(Message) + data_size;
auto buffer = ByteBuffer::create_uninitialized(required_size).release_value_but_fixme_should_propagate_errors(); // FIXME: Handle possible OOM situation.
u8* data = buffer.data();
auto* message = initialize_headers(data, data_size, MessageType::ClipboardRequest);
new (message->data) ClipboardRequest {
.type = (u32)type
};
return buffer;
}
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