/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
*/

#include "SDL_config.h"

#include "../SDL_sysvideo.h"
#include "../../events/SDL_windowevents_c.h"
#include "../SDL_egl_c.h"
#include "SDL_waylandwindow.h"
#include "SDL_waylandvideo.h"

static void
handle_ping(void *data, struct wl_shell_surface *shell_surface,
            uint32_t serial)
{
    wl_shell_surface_pong(shell_surface, serial);
}

static void
handle_configure(void *data, struct wl_shell_surface *shell_surface,
                 uint32_t edges, int32_t width, int32_t height)
{
}

static void
handle_popup_done(void *data, struct wl_shell_surface *shell_surface)
{
}

static const struct wl_shell_surface_listener shell_surface_listener = {
    handle_ping,
    handle_configure,
    handle_popup_done
};

SDL_bool
Wayland_GetWindowWMInfo(_THIS, SDL_Window * window, SDL_SysWMinfo * info)
{
    SDL_WindowData *data = (SDL_WindowData *) window->driverdata;

    info->info.wl.display = data->waylandData->display;
    info->info.wl.surface = data->surface;
    info->info.wl.shell_surface = data->shell_surface;
    info->subsystem = SDL_SYSWM_WAYLAND;

    return SDL_TRUE;
}

void Wayland_ShowWindow(_THIS, SDL_Window *window)
{
    SDL_WindowData *wind = window->driverdata;

    if (window->flags & SDL_WINDOW_FULLSCREEN)
        wl_shell_surface_set_fullscreen(wind->shell_surface,
                                        WL_SHELL_SURFACE_FULLSCREEN_METHOD_DEFAULT,
                                        0, NULL);
    else
        wl_shell_surface_set_toplevel(wind->shell_surface);

    wayland_schedule_write(_this->driverdata);
}

void
Wayland_SetWindowFullscreen(_THIS, SDL_Window * window,
                            SDL_VideoDisplay * _display, SDL_bool fullscreen)
{
    SDL_WindowData *wind = window->driverdata;

    if (fullscreen)
        wl_shell_surface_set_fullscreen(wind->shell_surface,
                                        WL_SHELL_SURFACE_FULLSCREEN_METHOD_SCALE,
                                        0, NULL);
    else
        wl_shell_surface_set_toplevel(wind->shell_surface);

    wayland_schedule_write(_this->driverdata);
}

int Wayland_CreateWindow(_THIS, SDL_Window *window)
{
    SDL_WindowData *data;
    SDL_VideoData *c;
    struct wl_region *region;

    data = calloc(1, sizeof *data);
    if (data == NULL)
        return 0;

    c = _this->driverdata;
    window->driverdata = data;

    if (!(window->flags & SDL_WINDOW_OPENGL)) {
        SDL_GL_LoadLibrary(NULL);
        window->flags |= SDL_WINDOW_OPENGL;
    }

    if (window->x == SDL_WINDOWPOS_UNDEFINED) {
        window->x = 0;
    }
    if (window->y == SDL_WINDOWPOS_UNDEFINED) {
        window->y = 0;
    }

    data->waylandData = c;
    data->sdlwindow = window;

    data->surface =
        wl_compositor_create_surface(c->compositor);
    wl_surface_set_user_data(data->surface, data);
    data->shell_surface = wl_shell_get_shell_surface(c->shell,
                                                     data->surface);
    data->egl_window = wl_egl_window_create(data->surface,
                                            window->w, window->h);

    /* Create the GLES window surface */
    data->egl_surface = SDL_EGL_CreateSurface(_this, (NativeWindowType) data->egl_window);
    
    if (data->egl_surface == EGL_NO_SURFACE) {
        SDL_SetError("failed to create a window surface");
        return -1;
    }

    if (data->shell_surface) {
        wl_shell_surface_set_user_data(data->shell_surface, data);
        wl_shell_surface_add_listener(data->shell_surface,
                                      &shell_surface_listener, data);
    }

    region = wl_compositor_create_region(c->compositor);
    wl_region_add(region, 0, 0, window->w, window->h);
    wl_surface_set_opaque_region(data->surface, region);
    wl_region_destroy(region);

    wayland_schedule_write(c);

    return 0;
}

void Wayland_SetWindowSize(_THIS, SDL_Window * window)
{
    SDL_VideoData *data = _this->driverdata;
    SDL_WindowData *wind = window->driverdata;
    struct wl_region *region;

    wl_egl_window_resize(wind->egl_window, window->w, window->h, 0, 0);

    region = wl_compositor_create_region(data->compositor);
    wl_region_add(region, 0, 0, window->w, window->h);
    wl_surface_set_opaque_region(wind->surface, region);
    wl_region_destroy(region);
}

void Wayland_DestroyWindow(_THIS, SDL_Window *window)
{
    SDL_VideoData *data = _this->driverdata;
    SDL_WindowData *wind = window->driverdata;

    window->driverdata = NULL;

    if (data) {
        SDL_EGL_DestroySurface(_this, wind->egl_surface);
        wl_egl_window_destroy(wind->egl_window);

        if (wind->shell_surface)
            wl_shell_surface_destroy(wind->shell_surface);

        wl_surface_destroy(wind->surface);

        SDL_free(wind);
        wayland_schedule_write(data);
    }
}

/* vi: set ts=4 sw=4 expandtab: */