#include "nuklear.h"

#include "nuklear_internal.h"

/* ===============================================================

 *

 *                              TOOLTIP

 *

 * ===============================================================*/

NK_API nk_bool

nk_tooltip_begin(struct nk_context *ctx, float width)

{

    int x,y,w,h;

    struct nk_window *win;

    const struct nk_input *in;

    struct nk_rect bounds;

    int ret;

    NK_ASSERT(ctx);

    NK_ASSERT(ctx->current);

    NK_ASSERT(ctx->current->layout);

    if (!ctx || !ctx->current || !ctx->current->layout)

        return 0;

    /* make sure that no nonblocking popup is currently active */

    win = ctx->current;

    in = &ctx->input;

    if (win->popup.win && (win->popup.type & NK_PANEL_SET_NONBLOCK))

        return 0;

    w = nk_iceilf(width);

    h = nk_iceilf(nk_null_rect.h);

    x = nk_ifloorf(in->mouse.pos.x + 1) - (int)win->layout->clip.x;

    y = nk_ifloorf(in->mouse.pos.y + 1) - (int)win->layout->clip.y;

    bounds.x = (float)x;

    bounds.y = (float)y;

    bounds.w = (float)w;

    bounds.h = (float)h;

    ret = nk_popup_begin(ctx, NK_POPUP_DYNAMIC,

        "__##Tooltip##__", NK_WINDOW_NO_SCROLLBAR|NK_WINDOW_BORDER, bounds);

    if (ret) win->layout->flags &= ~(nk_flags)NK_WINDOW_ROM;

    win->popup.type = NK_PANEL_TOOLTIP;

    ctx->current->layout->type = NK_PANEL_TOOLTIP;

    return ret;

}

NK_API void

nk_tooltip_end(struct nk_context *ctx)

{

    NK_ASSERT(ctx);

    NK_ASSERT(ctx->current);

    if (!ctx || !ctx->current) return;

    ctx->current->seq--;

    nk_popup_close(ctx);

    nk_popup_end(ctx);

}

NK_API void

nk_tooltip(struct nk_context *ctx, const char *text)

{

    const struct nk_style *style;

    struct nk_vec2 padding;

    int text_len;

    float text_width;

    float text_height;

    NK_ASSERT(ctx);

    NK_ASSERT(ctx->current);

    NK_ASSERT(ctx->current->layout);

    NK_ASSERT(text);

    if (!ctx || !ctx->current || !ctx->current->layout || !text)

        return;

    /* fetch configuration data */

    style = &ctx->style;

    padding = style->window.padding;

    /* calculate size of the text and tooltip */

    text_len = nk_strlen(text);

    text_width = style->font->width(style->font->userdata,

                    style->font->height, text, text_len);

    text_width += (4 * padding.x);

    text_height = (style->font->height + 2 * padding.y);

    /* execute tooltip and fill with text */

    if (nk_tooltip_begin(ctx, (float)text_width)) {

        nk_layout_row_dynamic(ctx, (float)text_height, 1);

        nk_text(ctx, text, text_len, NK_TEXT_LEFT);

        nk_tooltip_end(ctx);

    }

}

#ifdef NK_INCLUDE_STANDARD_VARARGS

NK_API void

nk_tooltipf(struct nk_context *ctx, const char *fmt, ...)

{

    va_list args;

    va_start(args, fmt);

    nk_tooltipfv(ctx, fmt, args);

    va_end(args);

}

NK_API void

nk_tooltipfv(struct nk_context *ctx, const char *fmt, va_list args)

{

    char buf[256];

    nk_strfmt(buf, NK_LEN(buf), fmt, args);

    nk_tooltip(ctx, buf);

}

#endif