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b907608e46
This allows us to seal a buffer *before* anyone else has access to it (well, ok, the creating process still does, but you can't win them all). It also means that a SharedBuffer can be shared with multiple clients: all you need is to have access to it to share it on again.
56 lines
2.1 KiB
C++
56 lines
2.1 KiB
C++
#include <LibC/SharedBuffer.h>
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#include <LibGUI/GClipboard.h>
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#include <LibGUI/GEventLoop.h>
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#include <WindowServer/WSAPITypes.h>
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GClipboard& GClipboard::the()
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{
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static GClipboard* s_the;
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if (!s_the)
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s_the = new GClipboard;
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return *s_the;
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}
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GClipboard::GClipboard()
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{
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}
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String GClipboard::data() const
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{
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WSAPI_ClientMessage request;
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request.type = WSAPI_ClientMessage::Type::GetClipboardContents;
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auto response = GWindowServerConnection::the().sync_request(request, WSAPI_ServerMessage::Type::DidGetClipboardContents);
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if (response.clipboard.shared_buffer_id < 0)
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return {};
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auto shared_buffer = SharedBuffer::create_from_shared_buffer_id(response.clipboard.shared_buffer_id);
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if (!shared_buffer) {
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dbgprintf("GClipboard::data() failed to attach to the shared buffer\n");
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return {};
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}
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if (response.clipboard.contents_size > shared_buffer->size()) {
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dbgprintf("GClipboard::data() clipping contents size is greater than shared buffer size\n");
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return {};
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}
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return String((const char*)shared_buffer->data(), response.clipboard.contents_size);
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}
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void GClipboard::set_data(const StringView& data)
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{
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WSAPI_ClientMessage request;
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request.type = WSAPI_ClientMessage::Type::SetClipboardContents;
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auto shared_buffer = SharedBuffer::create_with_size(data.length() + 1);
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if (!shared_buffer) {
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dbgprintf("GClipboard::set_data() failed to create a shared buffer\n");
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return;
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}
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if (!data.is_empty())
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memcpy(shared_buffer->data(), data.characters_without_null_termination(), data.length() + 1);
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else
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((u8*)shared_buffer->data())[0] = '\0';
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shared_buffer->seal();
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shared_buffer->share_with(GWindowServerConnection::the().server_pid());
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request.clipboard.shared_buffer_id = shared_buffer->shared_buffer_id();
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request.clipboard.contents_size = data.length();
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auto response = GWindowServerConnection::the().sync_request(request, WSAPI_ServerMessage::Type::DidSetClipboardContents);
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ASSERT(response.clipboard.shared_buffer_id == shared_buffer->shared_buffer_id());
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}
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