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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_renderer_list.h"

static void chooser_renderer_list_scroll_into_view(struct chooser_data* data,

                                                   const struct chooser_item* item)

{

    const struct chooser_renderer_list_params* params;

    params = (const struct chooser_renderer_list_params*)(data->info->rendererparams);

    struct chooser_renderer_list_data* rdata;

    rdata = (struct chooser_renderer_list_data*)(data->rendererdata);

    int available = params->viewport.size.y;

    if (item < rdata->top_item) rdata->top_item = item;

    const struct chooser_item* curr = rdata->top_item;

    const struct chooser_renderer_list_itemdata* iparams;

    while (available > 0)

    {

        if (curr >= &data->info->items[data->info->itemcount]) break;

        iparams = (const struct chooser_renderer_list_itemdata*)(curr->renderparams);

        if (available >= iparams->size.y)

        {

            available -= iparams->size.y;

            curr++;

        }

    }

    rdata->bottom_item = --curr;

    while (curr < item && curr < &data->info->items[data->info->itemcount])

    {

        curr++;

        iparams = (const struct chooser_renderer_list_itemdata*)(curr->renderparams);

        available -= iparams->size.y;

        while (available < 0)

        {

            const struct chooser_item* top = rdata->top_item++;

            iparams = (const struct chooser_renderer_list_itemdata*)(top->renderparams);

            available += iparams->size.y;

        }

        rdata->bottom_item = curr;

    }

}

static int chooser_renderer_list_init(struct chooser_data* data)

{

    const struct chooser_renderer_list_params* params;

    params = (const struct chooser_renderer_list_params*)(data->info->rendererparams);

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

    data->rendererdata = malloc(sizeof(struct chooser_renderer_list_data));

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

    struct chooser_renderer_list_data* rdata;

    rdata = (struct chooser_renderer_list_data*)(data->rendererdata);

    rdata->top_item = data->info->items;

    chooser_renderer_list_scroll_into_view(data, data->selected);

    return 0;

}

static enum chooser_result chooser_renderer_list_render(struct chooser_data* data)

{

    const struct chooser_renderer_list_params* params;

    params = (const struct chooser_renderer_list_params*)(data->info->rendererparams);

    struct chooser_renderer_list_data* rdata;

    rdata = (struct chooser_renderer_list_data*)(data->rendererdata);

    chooser_renderer_list_scroll_into_view(data, data->selected);

    const struct chooser_item* item = rdata->top_item;

    if (params->copy_dest.buf.addr == params->fill_dest.loc.buf.addr

     && params->copy_dest.buf.stride == params->fill_dest.loc.buf.stride

     && params->copy_dest.pos.x == params->fill_dest.loc.pos.x

     && params->copy_dest.pos.y == params->fill_dest.loc.pos.y

     && params->copy_src.size.x == params->fill_dest.size.x

     && params->copy_src.size.y == params->fill_dest.size.y && params->copy_src.loc.buf.addr)

    {

        blendcolor(params->copy_src.size.x, params->copy_src.size.y, params->fill_color,

                   params->copy_dest.buf.addr, params->copy_dest.pos.x,

                   params->copy_dest.pos.y, params->copy_dest.buf.stride,

                   params->copy_src.loc.buf.addr, params->copy_src.loc.pos.x,

                   params->copy_src.loc.pos.y, params->copy_src.loc.buf.stride);

        if (params->bg_opacity && params->bg_dest.buf.addr && params->bg_src.loc.buf.addr)

            blend(params->bg_src.size.x, params->bg_src.size.y, params->bg_opacity,

                  params->bg_dest.buf.addr, params->bg_dest.pos.x,

                  params->bg_dest.pos.y, params->bg_dest.buf.stride,

                  params->bg_dest.buf.addr, params->bg_dest.pos.x,

                  params->bg_dest.pos.y, params->bg_dest.buf.stride,

                  params->bg_src.loc.buf.addr, params->bg_src.loc.pos.x,

                  params->bg_src.loc.pos.y, params->bg_src.loc.buf.stride);

    }

    else if (params->copy_dest.buf.stride == params->bg_dest.buf.stride

     && params->bg_src.loc.buf.addr && params->copy_dest.buf.addr == params->bg_dest.buf.addr

     && params->copy_dest.pos.x == params->bg_dest.pos.x && !params->fill_dest.loc.buf.addr

     && params->copy_dest.pos.y == params->bg_dest.pos.y && params->copy_src.loc.buf.addr

     && params->copy_src.size.x == params->bg_src.size.x && params->copy_dest.buf.addr

     && params->copy_src.size.y == params->bg_src.size.y && params->bg_opacity)

    {

        blend(params->copy_src.size.x, params->copy_src.size.y, params->bg_opacity,

              params->copy_dest.buf.addr, params->copy_dest.pos.x,

              params->copy_dest.pos.y, params->copy_dest.buf.stride,

              params->copy_src.loc.buf.addr, params->copy_src.loc.pos.x,

              params->copy_src.loc.pos.y, params->copy_src.loc.buf.stride,

              params->bg_src.loc.buf.addr, params->bg_src.loc.pos.x,

              params->bg_src.loc.pos.y, params->bg_src.loc.buf.stride);

    }

    else

    {

        if (params->copy_src.loc.buf.addr && params->copy_dest.buf.addr)

            blit(params->copy_src.size.x, params->copy_src.size.y, 3,

                 params->copy_dest.buf.addr, params->copy_dest.pos.x,

                 params->copy_dest.pos.y, params->copy_dest.buf.stride,

                 params->copy_src.loc.buf.addr, params->copy_src.loc.pos.x,

                 params->copy_src.loc.pos.y, params->copy_src.loc.buf.stride);

        if (params->fill_dest.loc.buf.addr)

            blendcolor(params->fill_dest.size.x, params->fill_dest.size.y, params->fill_color,

                       params->fill_dest.loc.buf.addr, params->fill_dest.loc.pos.x,

                       params->fill_dest.loc.pos.y, params->fill_dest.loc.buf.stride,

                       params->fill_dest.loc.buf.addr, params->fill_dest.loc.pos.x,

                       params->fill_dest.loc.pos.y, params->fill_dest.loc.buf.stride);

        if (params->bg_opacity && params->bg_src.loc.buf.addr && params->bg_dest.buf.addr)

            blend(params->bg_src.size.x, params->bg_src.size.y, params->bg_opacity,

                  params->bg_dest.buf.addr, params->bg_dest.pos.x,

                  params->bg_dest.pos.y, params->bg_dest.buf.stride,

                  params->bg_dest.buf.addr, params->bg_dest.pos.x,

                  params->bg_dest.pos.y, params->bg_dest.buf.stride,

                  params->bg_src.loc.buf.addr, params->bg_src.loc.pos.x,

                  params->bg_src.loc.pos.y, params->bg_src.loc.buf.stride);

    }

    void* buf = params->viewport.loc.buf.addr;

    int stride = params->viewport.loc.buf.stride;

    int x = params->viewport.loc.pos.x;

    int y = params->viewport.loc.pos.y;

    const struct chooser_renderer_list_itemdata* iparams;

    while (item <= rdata->bottom_item)

    {

        iparams = (const struct chooser_renderer_list_itemdata*)(item->renderparams);

        uint32_t fill_color;

        uint32_t text_color;

        const struct libui_surface* icon;

        int icon_opacity;

        if (item == data->selected)

        {

            fill_color = iparams->fill_color_selected;

            text_color = iparams->text_color_selected;

            icon = &iparams->icon_selected;

            icon_opacity = iparams->icon_selected_opacity;

        }

        else

        {

            fill_color = iparams->fill_color;

            text_color = iparams->text_color;

            icon = &iparams->icon;

            icon_opacity = iparams->icon_opacity;

        }

        if (fill_color)

            blendcolor(iparams->fill_box.size.x, iparams->fill_box.size.y, fill_color,

                       buf, x + iparams->fill_box.pos.x, y + iparams->fill_box.pos.y, stride,

                       buf, x + iparams->fill_box.pos.x, y + iparams->fill_box.pos.y, stride);

        if (icon->loc.buf.addr && icon_opacity)

            blend(icon->size.x, icon->size.y, icon_opacity,

                  buf, x + iparams->icon_pos.x, y + iparams->icon_pos.y, stride,

                  buf, x + iparams->icon_pos.x, y + iparams->icon_pos.y, stride);

        if (iparams->text && iparams->text_color)

            rendertext(buf, x + iparams->text_pos.x, y + iparams->text_pos.y,

                       stride, text_color, 0, iparams->text);

        y += iparams->size.y;

        item++;

    }

    if (params->preblit && params->preblit(data)) return CHOOSER_RESULT_OK;

    displaylcd(params->blit_dest.x, params->blit_dest.y, params->blit_src.size.x,

               params->blit_src.size.y, params->blit_src.loc.buf.addr, params->blit_src.loc.pos.x,

               params->blit_src.loc.pos.y, params->blit_src.loc.buf.stride);

    if (params->postblit) params->postblit(data);

    return CHOOSER_RESULT_OK;

}

static const struct chooser_item* chooser_renderer_list_itematpixel(struct chooser_data* data,

                                                                    int x, int y)

{

    if (x < 0 || y < 0) return NULL;

    const struct chooser_renderer_list_params* params;

    params = (const struct chooser_renderer_list_params*)(data->info->rendererparams);

    struct chooser_renderer_list_data* rdata;

    rdata = (struct chooser_renderer_list_data*)(data->rendererdata);

    const struct chooser_item* item = rdata->top_item;

    const struct chooser_renderer_list_itemdata* iparams;

    while (true)

    {

        if (item >= &data->info->items[data->info->itemcount]) return NULL;

        iparams = (const struct chooser_renderer_list_itemdata*)(item->renderparams);

        if (y < iparams->size.y) break;

        y -= iparams->size.y;

        item++;

    }

    if (x < iparams->size.x) return item;

    return NULL;

}

static void chooser_renderer_list_destroy(struct chooser_data* data)

{

    free(data->rendererdata);

}

const struct chooser_renderer chooser_renderer_list = 

{

    .version = CHOOSER_RENDERER_VERSION,

    .init = chooser_renderer_list_init,

    .render = chooser_renderer_list_render,

    .itematpixel = chooser_renderer_list_itematpixel,

    .destroy = chooser_renderer_list_destroy

};