/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2011 Sam Lantinga

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Lesser General Public

    License as published by the Free Software Foundation; either

    version 2.1 of the License, or (at your option) any later version.

    This library 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

    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public

    License along with this library; if not, write to the Free Software

    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga

    slouken@libsdl.org

*/

#include "SDL_config.h"

/* Window event handling code for SDL */

#include "SDL_events.h"

#include "SDL_events_c.h"

#include "SDL_mouse_c.h"

#include "../video/SDL_sysvideo.h"

static int

RemovePendingSizeEvents(void * userdata, SDL_Event *event)

{

    SDL_Event *new_event = (SDL_Event *)userdata;

    if (event->type == SDL_WINDOWEVENT &&

        (event->window.event == SDL_WINDOWEVENT_RESIZED ||

         event->window.event == SDL_WINDOWEVENT_SIZE_CHANGED) &&

        event->window.windowID == new_event->window.windowID) {

        /* We're about to post a new size event, drop the old one */

        return 0;

    }

    return 1;

}

static int

RemovePendingMoveEvents(void * userdata, SDL_Event *event)

{

    SDL_Event *new_event = (SDL_Event *)userdata;

    if (event->type == SDL_WINDOWEVENT &&

        event->window.event == SDL_WINDOWEVENT_MOVED &&

        event->window.windowID == new_event->window.windowID) {

        /* We're about to post a new move event, drop the old one */

        return 0;

    }

    return 1;

}

int

SDL_SendWindowEvent(SDL_Window * window, Uint8 windowevent, int data1,

                    int data2)

{

    int posted;

    if (!window) {

        return 0;

    }

    switch (windowevent) {

    case SDL_WINDOWEVENT_SHOWN:

        if (window->flags & SDL_WINDOW_SHOWN) {

            return 0;

        }

        window->flags &= ~SDL_WINDOW_HIDDEN;

        window->flags |= SDL_WINDOW_SHOWN;

        SDL_OnWindowShown(window);

        break;

    case SDL_WINDOWEVENT_HIDDEN:

        if (!(window->flags & SDL_WINDOW_SHOWN)) {

            return 0;

        }

        window->flags &= ~SDL_WINDOW_SHOWN;

        window->flags |= SDL_WINDOW_HIDDEN;

        SDL_OnWindowHidden(window);

        break;

    case SDL_WINDOWEVENT_MOVED:

        if (SDL_WINDOWPOS_ISUNDEFINED(data1) ||

            SDL_WINDOWPOS_ISUNDEFINED(data2)) {

            return 0;

        }

        if (!(window->flags & SDL_WINDOW_FULLSCREEN)) {

            window->windowed.x = data1;

            window->windowed.y = data2;

        }

        if (data1 == window->x && data2 == window->y) {

            return 0;

        }

        window->x = data1;

        window->y = data2;

        break;

    case SDL_WINDOWEVENT_RESIZED:

        if (!(window->flags & SDL_WINDOW_FULLSCREEN)) {

            window->windowed.w = data1;

            window->windowed.h = data2;

        }

        if (data1 == window->w && data2 == window->h) {

            return 0;

        }

        window->w = data1;

        window->h = data2;

        SDL_OnWindowResized(window);

        break;

    case SDL_WINDOWEVENT_MINIMIZED:

        if (window->flags & SDL_WINDOW_MINIMIZED) {

            return 0;

        }

        window->flags |= SDL_WINDOW_MINIMIZED;

        SDL_OnWindowMinimized(window);

        break;

    case SDL_WINDOWEVENT_MAXIMIZED:

        if (window->flags & SDL_WINDOW_MAXIMIZED) {

            return 0;

        }

        window->flags |= SDL_WINDOW_MAXIMIZED;

        break;

    case SDL_WINDOWEVENT_RESTORED:

        if (!(window->flags & (SDL_WINDOW_MINIMIZED | SDL_WINDOW_MAXIMIZED))) {

            return 0;

        }

        window->flags &= ~(SDL_WINDOW_MINIMIZED | SDL_WINDOW_MAXIMIZED);

        SDL_OnWindowRestored(window);

        break;

    case SDL_WINDOWEVENT_ENTER:

        if (window->flags & SDL_WINDOW_MOUSE_FOCUS) {

            return 0;

        }

        window->flags |= SDL_WINDOW_MOUSE_FOCUS;

        break;

    case SDL_WINDOWEVENT_LEAVE:

        if (!(window->flags & SDL_WINDOW_MOUSE_FOCUS)) {

            return 0;

        }

        window->flags &= ~SDL_WINDOW_MOUSE_FOCUS;

        break;

    case SDL_WINDOWEVENT_FOCUS_GAINED:

        if (window->flags & SDL_WINDOW_INPUT_FOCUS) {

            return 0;

        }

        window->flags |= SDL_WINDOW_INPUT_FOCUS;

        SDL_OnWindowFocusGained(window);

        break;

    case SDL_WINDOWEVENT_FOCUS_LOST:

        if (!(window->flags & SDL_WINDOW_INPUT_FOCUS)) {

            return 0;

        }

        window->flags &= ~SDL_WINDOW_INPUT_FOCUS;

        SDL_OnWindowFocusLost(window);

        break;

    }

    /* Post the event, if desired */

    posted = 0;

    if (SDL_GetEventState(SDL_WINDOWEVENT) == SDL_ENABLE) {

        SDL_Event event;

        event.type = SDL_WINDOWEVENT;

        event.window.event = windowevent;

        event.window.data1 = data1;

        event.window.data2 = data2;

        event.window.windowID = window->id;

        /* Fixes queue overflow with resize events that aren't processed */

        if (windowevent == SDL_WINDOWEVENT_RESIZED ||

            SDL_FilterEvents(RemovePendingSizeEvents, &event);

        }

        if (windowevent == SDL_WINDOWEVENT_MOVED) {

            SDL_FilterEvents(RemovePendingMoveEvents, &event);

        }

        posted = (SDL_PushEvent(&event) > 0);

    }

	if (windowevent == SDL_WINDOWEVENT_CLOSE) {

		if ( !window->prev && !window->next ) {

			// This is the last window in the list so send the SDL_QUIT event

			SDL_SendQuit();

		}

	}

    return (posted);

}

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