menu.c

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#include "menu.h"

#include "cfg/cfg_menu.h"
#include "cfg/cfg_arch.h"

#include <cfg/compiler.h>
#include <cfg/debug.h>

#include <gfx/gfx.h>
#include <gfx/font.h>
#include <gfx/text.h>

#include <cpu/power.h>

#include <drv/kbd.h>

#include <string.h> /* strcpy() */

#if CPU_HARVARD
#include <avr/pgmspace.h> /* strncpy_P() */
#endif

#if (CONFIG_MENU_TIMEOUT != 0)
#include <drv/timer.h>
#endif

#if CONFIG_MENU_MENUBAR
#include "menubar.h"
#endif

#if defined(CONFIG_LOCALE) && (CONFIG_LOCALE == 1)
#include "msg.h"
#else
#define PTRMSG(x) ((const char *)x)
#endif


/* Temporary fake defines for ABORT stuff... */
#define abort_top  0
#define PUSH_ABORT false
#define POP_ABORT  do {} while(0)
#define DO_ABORT   do {} while(0)


static int menu_count(const struct Menu *menu)
{
    int cnt = 0;

    for (cnt = 0; /*NOP*/; ++cnt)
    {
        const MenuItem *item = &menu->items[cnt];
#if CPU_HARVARD
        MenuItem ram_item;
        if (menu->flags & MF_ROMITEMS)
        {
            memcpy_P(&ram_item, item, sizeof(ram_item));
            item = &ram_item;
        }
#endif
        if (!(item->label || item->hook))
            break;
    }

    return cnt;
}

#if CONFIG_MENU_MENUBAR

static void menu_update_menubar(
        const struct Menu *menu,
        struct MenuBar *mb,
        int selected)
{
    int item_flags;
#if CPU_HARVARD
    if (menu->flags & MF_ROMITEMS)
    {
        ASSERT(sizeof(menu->items[selected].flags) == sizeof(int));
        item_flags = pgm_read_int(&menu->items[selected].flags);
    }
    else
#endif
        item_flags = menu->items[selected].flags;

    const_iptr_t newlabel = (const_iptr_t)LABEL_OK;

    if (item_flags & MIF_DISABLED)
        newlabel = (const_iptr_t)LABEL_EMPTY;
    else if (item_flags & MIF_TOGGLE)
        newlabel = (const_iptr_t)LABEL_SEL;
    else if (item_flags & MIF_CHECKIT)
    {
        newlabel = (item_flags & MIF_CHECKED) ?
            (const_iptr_t)LABEL_EMPTY : (const_iptr_t)LABEL_SEL;
    }

    mb->labels[3] = newlabel;
    mbar_draw(mb);
}
#endif /* CONFIG_MENU_MENUBAR */


static void menu_defaultRenderHook(struct Bitmap *bm, int ypos, bool selected, const struct MenuItem *item)
{
    if (item->flags & MIF_CHECKIT)
    {
        gfx_rectClear(bm, 0, ypos,
                bm->font->height, ypos + bm->font->height);

        if (item->flags & MIF_TOGGLE)
            gfx_rectDraw(bm, 2, ypos + 2,
                    bm->font->height - 2, ypos + bm->font->height - 2);
        if (item->flags & MIF_CHECKED)
        {
            gfx_line(bm,
                    3, ypos + 3,
                    bm->font->height - 3, ypos + bm->font->height - 3);
            gfx_line(bm,
                    bm->font->height - 3, ypos + 3,
                    3, ypos + bm->font->height - 3);
        }
    }

#if CPU_HARVARD
    ((item->flags & MIF_RAMLABEL) ? text_xyprintf : text_xyprintf_P)
#else
    text_xyprintf
#endif
    (
        bm, (item->flags & MIF_CHECKIT) ? bm->font->height : 0, ypos,
        selected ? (STYLEF_INVERT | TEXT_FILL) : TEXT_FILL,
        PTRMSG(item->label)
    );
}

static void menu_layout(
        const struct Menu *menu,
        int first_item,
        int selected,
        bool redraw)
{
    coord_t ypos;
    int i;
    const char * PROGMEM title = PTRMSG(menu->title);
    Bitmap *bm = menu->bitmap;

    ypos = bm->cr.ymin;

    if (redraw)
    {
        /* Clear screen */
        text_clear(menu->bitmap);
    }

    if (title)
    {
        if (redraw)
            text_xyprintf(bm, 0, ypos, STYLEF_UNDERLINE | STYLEF_BOLD | TEXT_CENTER | TEXT_FILL, title);
        ypos += bm->font->height;
    }

#if CONFIG_MENU_SMOOTH
    static coord_t yoffset = 0;
    static int old_first_item = 0;
    static int speed;
    coord_t old_ymin = bm->cr.ymin;

    /* Clip drawing inside menu items area */
    gfx_setClipRect(bm,
        bm->cr.xmin, bm->cr.ymin + ypos,
        bm->cr.xmax, bm->cr.ymax);

    if (old_first_item != first_item)
    {
        /* Speed proportional to distance */
        speed = ABS(old_first_item - first_item) * 3;

        if (old_first_item > first_item)
        {
            yoffset += speed;
            if (yoffset > bm->font->height)
            {
                    yoffset = 0;
                    --old_first_item;
            }
        }
        else
        {
            yoffset -= speed;
            if (yoffset < -bm->font->height)
            {
                    yoffset = 0;
                    ++old_first_item;
            }
        }
        first_item = MIN(old_first_item, menu_count(menu));

        ypos += yoffset;
        redraw = true;
    }
#endif /* CONFIG_MENU_SMOOTH */

    if (redraw) for (i = first_item; ; ++i)
    {
        const MenuItem *item = &menu->items[i];
#if CPU_HARVARD
        MenuItem ram_item;
        if (menu->flags & MF_ROMITEMS)
        {
            memcpy_P(&ram_item, item, sizeof(ram_item));
            item = &ram_item;
        }
#endif /* CPU_HARVARD */

        /* Check for end of room */
        if (ypos > bm->cr.ymax)
            break;

        /* Check for end of menu */
        if (!(item->label || item->hook))
            break;

        /* Only print visible items */
        if (!(item->flags & MIF_HIDDEN))
        {
            #warning __FILTER_NEXT_WARNING__
            RenderHook renderhook = (item->flags & MIF_RENDERHOOK) ? (RenderHook)item->label : menu_defaultRenderHook;

            /* Render menuitem */
            renderhook(menu->bitmap, ypos++, (i == selected), item);

            ypos += bm->font->height;
        }
    }

#if CONFIG_MENU_SMOOTH
    if (redraw)
    {
        /* Clear rest of area */
        gfx_rectClear(bm, bm->cr.xmin, ypos, bm->cr.xmax, bm->cr.ymax);

        menu->lcd_blitBitmap(bm);
    }

    /* Restore old cliprect */
    gfx_setClipRect(bm,
            bm->cr.xmin, old_ymin,
            bm->cr.xmax, bm->cr.ymax);

#endif /* CONFIG_MENU_SMOOTH */
}


static iptr_t menu_doselect(const struct Menu *menu, struct MenuItem *item)
{
    iptr_t result = 0;

    /* Exclude other items */
    int mask, i;
    for (mask = item->flags & MIF_EXCLUDE_MASK, i = 0; mask; mask >>= 1, ++i)
    {
        if (mask & 1)
            menu->items[i].flags &= ~MIF_CHECKED;
    }

    if (item->flags & MIF_DISABLED)
        return MENU_DISABLED;

    /* Handle checkable items */
    if (item->flags & MIF_TOGGLE)
        item->flags ^= MIF_CHECKED;
    else if (item->flags & MIF_CHECKIT)
        item->flags |= MIF_CHECKED;

    /* Handle items with callback hooks */
    if (item->hook)
    {
        /* Push a jmp buffer to abort the operation with the STOP/CANCEL key */
        if (!PUSH_ABORT)
        {
            result = item->hook(item->userdata);
            POP_ABORT;
        }
    }
    else
        result = item->userdata;

    return result;
}


static int menu_next_visible_item(const struct Menu *menu, int index)
{
    int total = menu_count(menu);
    int item_flags;

    do
    {
        if (++index >= total)
           index = 0;

#if CPU_HARVARD
        if (menu->flags & MF_ROMITEMS)
        {
            ASSERT(sizeof(menu->items[index].flags) == sizeof(int));
            item_flags = pgm_read_int(&menu->items[index].flags);
        }
        else
#endif
            item_flags = menu->items[index].flags;
    }
    while (item_flags & MIF_HIDDEN);

    return index;
}


static int menu_prev_visible_item(const struct Menu *menu, int index)
{
    int total = menu_count(menu);
    int item_flags;

    do
    {
        if (--index < 0)
            index = total - 1;

#if CPU_HARVARD
        if (menu->flags & MF_ROMITEMS)
        {
            ASSERT(sizeof(menu->items[index].flags) == sizeof(int));
            item_flags = pgm_read_int(&menu->items[index].flags);
        }
        else
#endif
            item_flags = menu->items[index].flags;
    }
    while (item_flags & MIF_HIDDEN);

    return index;
}


iptr_t menu_handle(const struct Menu *menu)
{
    uint8_t items_per_page;
    uint8_t first_item = 0;
    uint8_t selected;
    iptr_t result = 0;
    bool redraw = true;

#if (CONFIG_MENU_TIMEOUT != 0)
    ticks_t now, menu_idle_time = timer_clock();
#endif

#if CONFIG_MENU_MENUBAR
    struct MenuBar mb;
    const_iptr_t labels[] =
    {
        (const_iptr_t)LABEL_BACK,
        (const_iptr_t)LABEL_UPARROW,
        (const_iptr_t)LABEL_DOWNARROW,
        (const_iptr_t)0
    };

    /*
     * Initialize menu bar
     */
    if (menu->flags & MF_TOPLEVEL)
        labels[0] = (const_iptr_t)LABEL_EMPTY;

    mbar_init(&mb, menu->bitmap, labels, countof(labels));
#endif /* CONFIG_MENU_MENUBAR */


    items_per_page =
        (menu->bitmap->height / menu->bitmap->font->height - 1)
#if CONFIG_MENU_MENUBAR
        - 1 /* menu bar labels */
#endif
        - (menu->title ? 1 : 0);

    /* Selected item should be a visible entry */
    //first_item = selected = menu_next_visible_item(menu, menu->selected - 1);
    selected = menu->selected;
    first_item = 0;

    for(;;)
    {
        keymask_t key;

        /*
         * Keep selected item visible
         */
        while (selected < first_item)
            first_item = menu_prev_visible_item(menu, first_item);
        while (selected >= first_item + items_per_page)
            first_item = menu_next_visible_item(menu, first_item);

        menu_layout(menu, first_item, selected, redraw);
        redraw = false;

        #if CONFIG_MENU_MENUBAR
            menu_update_menubar(menu, &mb, selected);
        #endif

        #if CONFIG_MENU_SMOOTH || (CONFIG_MENU_TIMEOUT != 0)
            key = kbd_peek();
            cpu_relax();
        #else
            key = kbd_get();
        #endif

        #if (CONFIG_MENU_TIMEOUT != 0)
            /* Reset idle timer on key press. */
            now = timer_clock();
            if (key)
                menu_idle_time = now;
        #endif

        if (key & K_OK)
        {
            struct MenuItem *item = &(menu->items[selected]);
#if CPU_HARVARD
            MenuItem ram_item;
            if (menu->flags & MF_ROMITEMS)
            {
                memcpy_P(&ram_item, item, sizeof(ram_item));
                item = &ram_item;
            }
#endif
            result = menu_doselect(menu, item);
            redraw = true;

            /* Return immediately */
            if (!(menu->flags & MF_STICKY))
                break;

            #if (CONFIG_MENU_TIMEOUT != 0)
                /* Chain timeout */
                if ((result == MENU_TIMEOUT) && !(menu->flags & MF_TOPLEVEL))
                    break;

                /* Reset timeout */
                menu_idle_time = timer_clock();
            #endif
        }
        else if (key & K_UP)
        {
            selected = menu_prev_visible_item(menu, selected);
            redraw = true;
        }
        else if (key & K_DOWN)
        {
            selected = menu_next_visible_item(menu, selected);
            redraw = true;
        }
        else if (!(menu->flags & MF_TOPLEVEL))
        {
            if (key & K_CANCEL)
            {
                result = MENU_CANCEL;
                break;
            }

            #if CONFIG_MENU_TIMEOUT != 0
                if (now - menu_idle_time > ms_to_ticks(CONFIG_MENU_TIMEOUT))
                {
                    result = MENU_TIMEOUT;
                    break;
                }
            #endif
        }
    }

    /* Store currently selected item before leaving. */
    if (menu->flags & MF_SAVESEL)
        #warning __FILTER_NEXT_WARNING__
        CONST_CAST(struct Menu *, menu)->selected = selected;

    return result;
}


int menu_setFlags(struct Menu *menu, int idx, int flags)
{
    ASSERT(idx < menu_count(menu));
    ASSERT(!(menu->flags & MF_ROMITEMS));

    int old = menu->items[idx].flags;
    menu->items[idx].flags |= flags;
    return old;
}


int menu_clearFlags(struct Menu *menu, int idx, int flags)
{
    ASSERT(idx < menu_count(menu));
    ASSERT(!(menu->flags & MF_ROMITEMS));

    int old = menu->items[idx].flags;
    menu->items[idx].flags &= ~flags;
    return old;
}