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/*
* Copyright © 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 2 or 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/>.
*/
#ifndef MIRAL_WAYLAND_APP_H
#define MIRAL_WAYLAND_APP_H
#include <wayland-client.h>
#include <memory>
#include <map>
#include <functional>
#include <cstdint>
class WaylandApp;
template<typename T>
class WaylandObject
{
public:
WaylandObject()
: proxy{nullptr, [](auto){}}
{
}
WaylandObject(T* proxy, void(*destroy)(T*))
: proxy{proxy, destroy}
{
}
operator T*() const
{
return proxy.get();
}
private:
std::unique_ptr<T, void(*)(T*)> proxy;
};
class WaylandCallback
{
public:
/// Takes ownership of callback
static void create(wl_callback* callback, std::function<void()>&& func);
private:
WaylandCallback(WaylandObject<wl_callback> callback, std::function<void()>&& func)
: callback{std::move(callback)},
func{std::move(func)}
{
}
static wl_callback_listener const callback_listener;
WaylandObject<wl_callback> const callback;
std::function<void()> const func;
};
class WaylandOutput
{
public:
WaylandOutput(WaylandApp* app, wl_output* output);
virtual ~WaylandOutput() = default;
auto scale() const -> int { return scale_; }
auto transform() const -> int { return transform_; }
auto operator==(wl_output* other) const -> bool { return wl_ == other; }
auto wl() const -> wl_output* { return wl_; }
private:
static void handle_geometry(
void* data,
struct wl_output* wl_output,
int32_t x,
int32_t y,
int32_t physical_width,
int32_t physical_height,
int32_t subpixel,
const char *make,
const char *model,
int32_t transform);
static void handle_mode(
void *data,
struct wl_output* wl_output,
uint32_t flags,
int32_t width,
int32_t height,
int32_t refresh);
static void handle_done(void* data, struct wl_output* wl_output);
static void handle_scale(void* data, struct wl_output* wl_output, int32_t factor);
static wl_output_listener const output_listener;
WaylandApp* const app;
WaylandObject<wl_output> const wl_;
bool has_initialized;
bool state_dirty;
int scale_;
int32_t transform_;
};
class WaylandApp
{
public:
WaylandApp();
WaylandApp(wl_display* display);
virtual ~WaylandApp() = default;
/// Needs to be two-step initialized to virtual methods are called
void wayland_init(wl_display* display);
void roundtrip() const;
auto display() const -> wl_display* { return display_.get(); };
auto compositor() const -> wl_compositor* { return compositor_; };
auto shm() const -> wl_shm* { return shm_; };
auto seat() const -> wl_seat* { return seat_; };
auto shell() const -> wl_shell* { return shell_; };
protected:
friend WaylandOutput;
virtual void output_ready(WaylandOutput const*) {};
virtual void output_changed(WaylandOutput const*) {};
virtual void output_gone(WaylandOutput const*) {};
private:
/// Doesn't disconnect the display, instead roundtrips it to make sure everything is cleaned up
std::unique_ptr<wl_display, decltype(&wl_display_roundtrip)> display_;
WaylandObject<wl_registry> registry_;
WaylandObject<wl_compositor> compositor_;
WaylandObject<wl_shm> shm_;
WaylandObject<wl_seat> seat_;
WaylandObject<wl_shell> shell_;
static void handle_new_global(
void* data,
struct wl_registry* registry,
uint32_t id,
char const* interface,
uint32_t version);
static void handle_global_remove(void* data, struct wl_registry* registry, uint32_t name);
static wl_registry_listener const registry_listener;
/// Functions to call then drop when globals are removed
std::map<uint32_t, std::function<void()>> global_remove_handlers;
};
#endif // MIRAL_WAYLAND_APP_H
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