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/*
* Copyright © 2016 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authored by: Alan Griffiths <alan@octopull.co.uk>
*/
#include "miral/active_outputs.h"
#include "miral/output.h"
#include <mir/graphics/display_configuration_report.h>
#include <mir/graphics/display_configuration.h>
#include <mir/server.h>
#include <algorithm>
#include <mutex>
#include <vector>
void miral::ActiveOutputsListener::advise_output_begin() {}
void miral::ActiveOutputsListener::advise_output_end() {}
void miral::ActiveOutputsListener::advise_output_create(Output const& /*output*/) {}
void miral::ActiveOutputsListener::advise_output_update(Output const& /*updated*/, Output const& /*original*/) {}
void miral::ActiveOutputsListener::advise_output_delete(Output const& /*output*/) {}
struct miral::ActiveOutputsMonitor::Self : mir::graphics::DisplayConfigurationReport
{
virtual void initial_configuration(mir::graphics::DisplayConfiguration const& configuration) override;
virtual void new_configuration(mir::graphics::DisplayConfiguration const& configuration) override;
std::mutex mutex;
std::vector<ActiveOutputsListener*> listeners;
std::vector<Output> outputs;
};
miral::ActiveOutputsMonitor::ActiveOutputsMonitor() :
self{std::make_shared<Self>()}
{
}
miral::ActiveOutputsMonitor::~ActiveOutputsMonitor() = default;
miral::ActiveOutputsMonitor::ActiveOutputsMonitor(ActiveOutputsMonitor const&) = default;
miral::ActiveOutputsMonitor& miral::ActiveOutputsMonitor::operator=(ActiveOutputsMonitor const&) = default;
void miral::ActiveOutputsMonitor::add_listener(ActiveOutputsListener* listener)
{
std::lock_guard<decltype(self->mutex)> lock{self->mutex};
self->listeners.push_back(listener);
}
void miral::ActiveOutputsMonitor::delete_listener(ActiveOutputsListener* listener)
{
std::lock_guard<decltype(self->mutex)> lock{self->mutex};
auto const new_end = std::remove(self->listeners.begin(), self->listeners.end(), listener);
self->listeners.erase(new_end, self->listeners.end());
}
void miral::ActiveOutputsMonitor::operator()(mir::Server& server)
{
std::lock_guard<decltype(self->mutex)> lock{self->mutex};
server.override_the_display_configuration_report([this]{ return self; });
}
void miral::ActiveOutputsMonitor::for_each_output(
std::function<void(std::vector<Output> const& outputs)> const& functor) const
{
std::lock_guard<decltype(self->mutex)> lock{self->mutex};
functor(self->outputs);
}
void miral::ActiveOutputsMonitor::Self::initial_configuration(mir::graphics::DisplayConfiguration const& configuration)
{
new_configuration(configuration);
}
void miral::ActiveOutputsMonitor::Self::new_configuration(mir::graphics::DisplayConfiguration const& configuration)
{
std::lock_guard<decltype(mutex)> lock{mutex};
decltype(outputs) current_outputs;
for (auto const l : listeners)
l->advise_output_begin();
configuration.for_each_output([¤t_outputs, this](mir::graphics::DisplayConfigurationOutput const& output)
{
Output o{output};
if (!o.connected() || !o.valid()) return;
auto op = find_if(begin(outputs), end(outputs), [&](Output const& oo) { return oo.is_same_output(o); });
if (op == end(outputs))
{
for (auto const l : listeners)
l->advise_output_create(o);
}
else if (!equivalent_display_area(o, *op))
{
for (auto const l : listeners)
l->advise_output_update(o, *op);
}
current_outputs.push_back(o);
});
for (auto const& o : outputs)
{
auto op = find_if(begin(current_outputs), end(current_outputs), [&](Output const& oo)
{ return oo.is_same_output(o); });
if (op == end(current_outputs))
for (auto const l : listeners)
l->advise_output_delete(o);
}
current_outputs.swap(outputs);
for (auto const l : listeners)
l->advise_output_end();
}
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