124 lines
2.9 KiB
C++
124 lines
2.9 KiB
C++
/*
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* \brief Local nitpicker service provided to dialog slaves
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* \author Norman Feske
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* \date 2014-10-01
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*
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* This implementation of the nitpicker interface intercepts the input events
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* of a dialog slave to let the launcher respond to events (like mouse clicks)
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* directly.
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*/
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/*
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* Copyright (C) 2014 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _DIALOG_NITPICKER_H_
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#define _DIALOG_NITPICKER_H_
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/* Genode includes */
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#include <util/string.h>
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#include <os/attached_dataspace.h>
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#include <nitpicker_session/nitpicker_session.h>
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#include <input_session/client.h>
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#include <input/event.h>
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#include <input/component.h>
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/* gems includes */
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#include <gems/wrapped_nitpicker_session.h>
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/* local includes */
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#include <types.h>
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namespace Launcher {
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struct Dialog_nitpicker_session;
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struct Dialog_nitpicker_service;
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}
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struct Launcher::Dialog_nitpicker_session : Wrapped_nitpicker_session
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{
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struct Input_event_handler
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{
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/**
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* Handle input event
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*
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* \return true if the event should be propagated to the wrapped
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* nitpicker session
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*/
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virtual bool handle_input_event(Input::Event const &ev) = 0;
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};
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Input_event_handler &_input_event_handler;
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Server::Entrypoint &_ep;
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Nitpicker::Session &_nitpicker_session;
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Input::Session_client _nitpicker_input { _nitpicker_session.input_session() };
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Attached_dataspace _nitpicker_input_ds { _nitpicker_input.dataspace() };
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Signal_rpc_member<Dialog_nitpicker_session>
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_input_dispatcher { _ep, *this, &Dialog_nitpicker_session::_input_handler };
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Input::Session_component _input_session;
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Capability<Input::Session> _input_session_cap { _ep.manage(_input_session) };
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/**
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* Constructor
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*/
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Dialog_nitpicker_session(Nitpicker::Session &nitpicker_session,
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Server::Entrypoint &ep,
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Input_event_handler &input_event_handler)
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:
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Wrapped_nitpicker_session(nitpicker_session),
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_input_event_handler(input_event_handler),
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_ep(ep),
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_nitpicker_session(nitpicker_session)
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{
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_nitpicker_input.sigh(_input_dispatcher);
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_input_session.event_queue().enabled(true);
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}
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~Dialog_nitpicker_session()
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{
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_ep.dissolve(_input_session);
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}
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void _input_handler(unsigned)
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{
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Input::Event const * const events =
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_nitpicker_input_ds.local_addr<Input::Event>();
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while (_nitpicker_input.is_pending()) {
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size_t const num_events = _nitpicker_input.flush();
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for (size_t i = 0; i < num_events; i++) {
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Input::Event const &ev = events[i];
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if (_input_event_handler.handle_input_event(ev))
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_input_session.submit(ev);
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}
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}
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}
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/*********************************
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** Nitpicker session interface **
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*********************************/
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Input::Session_capability input_session() override
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{
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return _input_session_cap;
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}
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};
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#endif /* _DIALOG_NITPICKER_H_ */
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