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//

//

//    Copyright 2011 TheSeven

//

//

//    This file is part of emCORE.

//

//    emCORE is free software: you can redistribute it and/or

//    modify it under the terms of the GNU General Public License as

//    published by the Free Software Foundation, either version 2 of the

//    License, or (at your option) any later version.

//

//    emCORE 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 emCORE.  If not, see <http://www.gnu.org/licenses/>.

//

//

#include "emcorelib.h"

#include "libui.h"

#include "chooser.h"

#include "chooser_action_handler_wheel.h"

static int chooser_action_handler_wheel_init(struct chooser_data* data)

{

    const struct chooser_action_handler_wheel_params* params;

    params = (const struct chooser_action_handler_wheel_params*)(data->info->actionhandlerparams);

    if (params->version != CHOOSER_ACTION_HANDLER_WHEEL_PARAMS_VERSION) return -1;

    data->actionhandlerdata = malloc(sizeof(struct chooser_action_handler_wheel_data));

    if (!data->actionhandlerdata) return -2;

    struct chooser_action_handler_wheel_data* adata;

    adata = (struct chooser_action_handler_wheel_data*)(data->actionhandlerdata);

    adata->timeout_remaining = params->timeout_initial;

    adata->lasttick = USEC_TIMER;

    return 0;

}

static enum chooser_result chooser_action_handler_wheel_handleevent(struct chooser_data* data,

                                                                    enum button_event event,

                                                                    int which, int value)

{

    const struct chooser_action_handler_wheel_params* params;

    params = (const struct chooser_action_handler_wheel_params*)(data->info->actionhandlerparams);

    struct chooser_action_handler_wheel_data* adata;

    adata = (struct chooser_action_handler_wheel_data*)(data->actionhandlerdata);

    if (params->eventfilter && params->eventfilter(data, event, which, value))

        return CHOOSER_RESULT_OK;

    adata->timeout_remaining = params->timeout_idle;

    int spi = params->stepsperitem;

    switch (event)

    {

        case BUTTON_PRESS:

            if (which < params->buttoncount)

                switch (params->buttonmap[which])

                {

                    case CHOOSER_ACTION_HANDLER_WHEEL_ACTION_PREV:

                        mutex_lock(&data->statemutex, TIMEOUT_BLOCK);

                        data->position = MIN(data->info->itemcount * spi,

                                             MAX(spi, data->position & ~(spi - 1))) - spi / 2;

                        data->selected = &data->info->items[data->position / spi];

                        mutex_unlock(&data->statemutex);

                        return CHOOSER_RESULT_REDRAW;

                    case CHOOSER_ACTION_HANDLER_WHEEL_ACTION_NEXT:

                        mutex_lock(&data->statemutex, TIMEOUT_BLOCK);

                        data->position = MIN(data->info->itemcount * spi,

                                             MAX(spi, (data->position & ~(spi - 1)) + 2 * spi))

                                                    - spi / 2;

                        data->selected = &data->info->items[data->position / spi];

                        mutex_unlock(&data->statemutex);

                        return CHOOSER_RESULT_REDRAW;

                    case CHOOSER_ACTION_HANDLER_WHEEL_ACTION_SELECT:

                        return CHOOSER_RESULT_FINISHED;

                    case CHOOSER_ACTION_HANDLER_WHEEL_ACTION_CANCEL:

                        return CHOOSER_RESULT_CANCEL;

                }

        case WHEEL_MOVED_ACCEL:

            mutex_lock(&data->statemutex, TIMEOUT_BLOCK);

            data->position = MIN(data->info->itemcount * spi - 1, MAX(0, data->position + value));

            data->selected = &data->info->items[data->position / spi];

            mutex_unlock(&data->statemutex);

            return CHOOSER_RESULT_REDRAW;

    }

    return CHOOSER_RESULT_OK;

}

static enum chooser_result chooser_action_handler_wheel_handletick(struct chooser_data* data)

{

    enum chooser_result rc = CHOOSER_RESULT_OK;

    const struct chooser_action_handler_wheel_params* params;

    params = (const struct chooser_action_handler_wheel_params*)(data->info->actionhandlerparams);

    struct chooser_action_handler_wheel_data* adata;

    adata = (struct chooser_action_handler_wheel_data*)(data->actionhandlerdata);

    if (params->tick_force_redraw) rc = CHOOSER_RESULT_REDRAW;

    if (adata->timeout_remaining == TIMEOUT_BLOCK) return rc;

    long time = USEC_TIMER;

    adata->timeout_remaining -= time - adata->lasttick;

    adata->lasttick = time;

    if (adata->timeout_remaining < 0)

    {

        if (params->timeout_item == CHOOSER_ACTION_HANDLER_WHEEL_TIMEOUT_ITEM_NULL)

            return CHOOSER_RESULT_CANCEL;

        else if (params->timeout_item != CHOOSER_ACTION_HANDLER_WHEEL_TIMEOUT_ITEM_KEEP)

            data->selected = &data->info->items[params->timeout_item];

        return CHOOSER_RESULT_FINISHED;

    }

    return rc;

}

static int chooser_action_handler_wheel_stepsperitem(struct chooser_data* data)

{

    const struct chooser_action_handler_wheel_params* params;

    params = (const struct chooser_action_handler_wheel_params*)(data->info->actionhandlerparams);

    return params->stepsperitem;

}

static void chooser_action_handler_wheel_destroy(struct chooser_data* data)

{

    free(data->actionhandlerdata);

}

const struct chooser_action_handler chooser_action_handler_wheel =

{

    .version = CHOOSER_ACTION_HANDLER_VERSION,

    .init = chooser_action_handler_wheel_init,

    .handleevent = chooser_action_handler_wheel_handleevent,

    .handletick = chooser_action_handler_wheel_handletick,

    .stepsperitem = chooser_action_handler_wheel_stepsperitem,

    .destroy = chooser_action_handler_wheel_destroy

};