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https://github.com/SerenityOS/serenity.git
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244efe050a
This commit moves the clipboard from WindowServer into a new Clipboard service program. Clipboard runs as the unprivileged "clipboard" user and with a much tighter pledge than WindowServer. To keep things working as before, all GUI::Application users now make a connection to Clipboard after making the connection to WindowServer. It could be interesting to connect to Clipboard on demand, but right now that would necessitate expanding every GUI app's pledge to include "unix" and also unveiling the clipboard portal, which I prefer not to.
103 lines
4.1 KiB
C++
103 lines
4.1 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Badge.h>
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#include <AK/SharedBuffer.h>
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#include <Clipboard/ClientConnection.h>
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#include <Clipboard/ClipboardClientEndpoint.h>
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#include <Clipboard/Storage.h>
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namespace Clipboard {
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static HashMap<int, RefPtr<ClientConnection>> s_connections;
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void ClientConnection::for_each_client(Function<void(ClientConnection&)> callback)
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{
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for (auto& it : s_connections) {
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callback(*it.value);
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}
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}
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ClientConnection::ClientConnection(Core::LocalSocket& socket, int client_id)
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: IPC::ClientConnection<ClipboardServerEndpoint>(*this, socket, client_id)
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{
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s_connections.set(client_id, *this);
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}
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ClientConnection::~ClientConnection()
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{
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}
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void ClientConnection::die()
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{
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s_connections.remove(client_id());
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}
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OwnPtr<Messages::ClipboardServer::GreetResponse> ClientConnection::handle(const Messages::ClipboardServer::Greet&)
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{
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return make<Messages::ClipboardServer::GreetResponse>(client_id());
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}
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OwnPtr<Messages::ClipboardServer::SetClipboardDataResponse> ClientConnection::handle(const Messages::ClipboardServer::SetClipboardData& message)
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{
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auto shared_buffer = SharedBuffer::create_from_shbuf_id(message.shbuf_id());
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if (!shared_buffer) {
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did_misbehave("SetClipboardData: Bad shared buffer ID");
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return nullptr;
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}
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Storage::the().set_data(*shared_buffer, message.data_size(), message.mime_type());
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return make<Messages::ClipboardServer::SetClipboardDataResponse>();
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}
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OwnPtr<Messages::ClipboardServer::GetClipboardDataResponse> ClientConnection::handle(const Messages::ClipboardServer::GetClipboardData&)
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{
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auto& storage = Storage::the();
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i32 shbuf_id = -1;
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if (storage.data_size()) {
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// FIXME: Optimize case where an app is copy/pasting within itself.
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// We can just reuse the SharedBuffer then, since it will have the same peer PID.
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// It would be even nicer if a SharedBuffer could have an arbitrary number of clients..
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RefPtr<SharedBuffer> shared_buffer = SharedBuffer::create_with_size(storage.data_size());
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ASSERT(shared_buffer);
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memcpy(shared_buffer->data(), storage.data(), storage.data_size());
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shared_buffer->seal();
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shared_buffer->share_with(client_pid());
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shbuf_id = shared_buffer->shbuf_id();
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// FIXME: This is a workaround for the fact that SharedBuffers will go away if neither side is retaining them.
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// After we respond to GetClipboardData, we have to wait for the client to ref the buffer on his side.
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m_last_sent_buffer = move(shared_buffer);
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}
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return make<Messages::ClipboardServer::GetClipboardDataResponse>(shbuf_id, storage.data_size(), storage.mime_type());
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}
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void ClientConnection::notify_about_clipboard_change()
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{
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post_message(Messages::ClipboardClient::ClipboardDataChanged(Storage::the().mime_type()));
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}
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}
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