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Add Input::Session::exclusive() interface

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This interface allows a GUI client to express the intent to exclusively
observe relative motion events while locking the absolute pointer
position. This patch merely extends the interface without implementing
it.

As this change touches os/include/input/component.h, it moves the
manage/dissolve operations into the class, ensuring the call of
dissolve at destruction time.

Issue #5355
This commit is contained in:
Norman Feske
2024-10-03 17:46:32 +02:00
committed by Christian Helmuth
parent 318d641266
commit d7830a0ce6
10 changed files with 136 additions and 69 deletions
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39
repos/os/include/input/component.h
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@ -25,11 +25,21 @@
namespace Input { class Session_component; }
class Input::Session_component : public Genode::Rpc_object<Input::Session>
class Input::Session_component : public Rpc_object<Input::Session>
{
public:
struct Action : Interface
{
virtual void exclusive_input_requested(bool) = 0;
};
private:
Genode::Attached_ram_dataspace _ds;
Entrypoint &_ep;
Action &_action;
Attached_ram_dataspace _ds;
Event_queue _event_queue { };
@ -38,12 +48,18 @@ class Input::Session_component : public Genode::Rpc_object<Input::Session>
/**
* Constructor
*
* \param ram allocator for the session buffer
* \param ram allocator for the shared-memory input buffer
*/
Session_component(Genode::Env &env, Genode::Ram_allocator &ram)
Session_component(Entrypoint &ep, Ram_allocator &ram,
Region_map &rm, Action &action)
:
_ds(ram, env.rm(), Event_queue::QUEUE_SIZE*sizeof(Input::Event))
{ }
_ep(ep), _action(action),
_ds(ram, rm, Event_queue::QUEUE_SIZE*sizeof(Input::Event))
{
_ep.manage(*this);
}
~Session_component() { _ep.dissolve(*this); }
/**
* Return reference to event queue of the session
@ -58,7 +74,7 @@ class Input::Session_component : public Genode::Rpc_object<Input::Session>
try {
_event_queue.add(event);
} catch (Input::Event_queue::Overflow) {
Genode::warning("input overflow - resetting queue");
warning("input overflow - resetting queue");
_event_queue.reset();
}
}
@ -68,7 +84,7 @@ class Input::Session_component : public Genode::Rpc_object<Input::Session>
** Input::Session interface **
******************************/
Genode::Dataspace_capability dataspace() override { return _ds.cap(); }
Dataspace_capability dataspace() override { return _ds.cap(); }
bool pending() const override { return !_event_queue.empty(); }
@ -83,10 +99,15 @@ class Input::Session_component : public Genode::Rpc_object<Input::Session>
return cnt;
}
void sigh(Genode::Signal_context_capability sigh) override
void sigh(Signal_context_capability sigh) override
{
_event_queue.sigh(sigh);
}
void exclusive(bool enabled) override
{
_action.exclusive_input_requested(enabled);
}
};
#endif /* _INCLUDE__INPUT__COMPONENT_H_ */