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/*
* Copyright © 2014 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 "server_example_window_manager.h"
#include "server_example_window_management.h"
#include "mir/server.h"
#include "mir/compositor/display_buffer_compositor_factory.h"
#include "mir/compositor/display_buffer_compositor.h"
#include "mir/graphics/display_buffer.h"
#include "mir/options/option.h"
#include "mir/scene/session_listener.h"
namespace mc = mir::compositor;
namespace me = mir::examples;
namespace mg = mir::graphics;
namespace ms = mir::scene;
using namespace mir::geometry;
///\example server_example_window_manager.cpp
/// Demonstrate introducing a window management strategy
namespace
{
class SceneTracker : public ms::SessionListener
{
public:
SceneTracker(std::shared_ptr<me::WindowManager> const& window_manager) :
window_manager(window_manager)
{
}
private:
void starting(std::shared_ptr<ms::Session> const& session) override
{
window_manager->add_session(session);
}
void stopping(std::shared_ptr<ms::Session> const& session) override
{
window_manager->remove_session(session);
}
void focused(std::shared_ptr<ms::Session> const& /*session*/) override {}
void unfocused() override {}
void surface_created(ms::Session& session, std::shared_ptr<ms::Surface> const& surface) override
{
window_manager->add_surface(surface, &session);
}
void destroying_surface(ms::Session& session, std::shared_ptr<ms::Surface> const& surface) override
{
window_manager->remove_surface(surface, &session);
}
std::shared_ptr<me::WindowManager> const window_manager;
};
class DisplayTracker : public mc::DisplayBufferCompositor
{
public:
DisplayTracker(
std::unique_ptr<mc::DisplayBufferCompositor>&& wrapped,
Rectangle const& area,
std::shared_ptr<me::WindowManager> const& window_manager) :
wrapped{std::move(wrapped)},
area{area},
window_manager(window_manager)
{
window_manager->add_display(area);
}
~DisplayTracker() noexcept
{
window_manager->remove_display(area);
}
private:
void composite(mc::SceneElementSequence&& scene_sequence) override
{
wrapped->composite(std::move(scene_sequence));
}
std::unique_ptr<mc::DisplayBufferCompositor> const wrapped;
Rectangle const area;
std::shared_ptr<me::WindowManager> const window_manager;
};
class DisplayTrackerFactory : public mc::DisplayBufferCompositorFactory
{
public:
DisplayTrackerFactory(
std::shared_ptr<mc::DisplayBufferCompositorFactory> const& wrapped,
std::shared_ptr<me::WindowManager> const& window_manager) :
wrapped{wrapped},
window_manager(window_manager)
{
}
private:
std::unique_ptr<mc::DisplayBufferCompositor> create_compositor_for(mg::DisplayBuffer& display_buffer)
{
auto compositor = wrapped->create_compositor_for(display_buffer);
return std::unique_ptr<mc::DisplayBufferCompositor>{
new DisplayTracker{std::move(compositor), display_buffer.view_area(), window_manager}};
}
std::shared_ptr<mc::DisplayBufferCompositorFactory> const wrapped;
std::shared_ptr<me::WindowManager> const window_manager;
};
}
void me::add_window_manager_option_to(Server& server)
{
server.add_configuration_option(me::wm_option, me::wm_description, mir::OptionType::string);
auto const factory = std::make_shared<me::WindowManagmentFactory>(server);
server.override_the_placement_strategy([factory, &server]()
-> std::shared_ptr<ms::PlacementStrategy>
{
auto const options = server.get_options();
if (!options->is_set(me::wm_option))
return std::shared_ptr<ms::PlacementStrategy>{};
return factory->window_manager();
});
server.override_the_session_listener([factory, &server]()
-> std::shared_ptr<ms::SessionListener>
{
auto const options = server.get_options();
if (!options->is_set(me::wm_option))
return std::shared_ptr<ms::SessionListener>{};
return std::make_shared<SceneTracker>(factory->window_manager());
});
server.override_the_surface_configurator([factory, &server]()
-> std::shared_ptr<ms::SurfaceConfigurator>
{
auto const options = server.get_options();
if (!options->is_set(me::wm_option))
return std::shared_ptr<ms::SurfaceConfigurator>{};
return factory->window_manager();
});
server.wrap_display_buffer_compositor_factory([factory, &server]
(std::shared_ptr<mc::DisplayBufferCompositorFactory> const& wrapped)
-> std::shared_ptr<mc::DisplayBufferCompositorFactory>
{
auto const options = server.get_options();
if (!options->is_set(me::wm_option))
return wrapped;
return std::make_shared<DisplayTrackerFactory>(wrapped, factory->window_manager());
});
}
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