gp_widget_tattr.h

//SPDX-License-Identifier: LGPL-2.0-or-later
/*
 
   Copyright (c) 2014-2021 Cyril Hrubis <metan@ucw.cz>
 
 */
 
#ifndef GP_WIDGET_TATTR_H
#define GP_WIDGET_TATTR_H
 
#include <text/gp_text.h>
#include <widgets/gp_widget_types.h>
#include <widgets/gp_widget_render.h>
 
enum gp_widget_tattr {
        /* Fonts */
        GP_TATTR_BOLD  = 0x10,
        GP_TATTR_LARGE = 0x20,
        /* Monospace does not support large */
        GP_TATTR_MONO  = 0x40,
        GP_TATTR_FONT = 0x70,
 
        /* Horizontal alignment */
        GP_TATTR_LEFT = 0x01,
        GP_TATTR_CENTER = 0x02,
        GP_TATTR_RIGHT = 0x03,
        GP_TATTR_HALIGN = 0x03,
};
 
/*
 * @brief Returns text font based on text attributes and render context.
 */
static inline const gp_text_style *gp_widget_tattr_font(gp_widget_tattr attr, const gp_widget_render_ctx *ctx)
{
        if (attr & GP_TATTR_MONO) {
                if (attr & GP_TATTR_BOLD)
                        return ctx->font_mono_bold;
                else
                        return ctx->font_mono;
        }
 
        if (attr & GP_TATTR_BOLD) {
                if (attr & GP_TATTR_LARGE)
                        return ctx->font_big_bold;
                else
                        return ctx->font_bold;
        }
 
        if (attr & GP_TATTR_LARGE)
                return ctx->font_big;
 
        return ctx->font;
}
 
static inline int gp_widget_tattr_halign(gp_widget_tattr attr)
{
        return attr & GP_TATTR_HALIGN;
}
 
/*
 * @brief Parses an attributes encoded in a string into attribute bitflags.
 *
 * The attributes are separated by | e.g. valid attributes string is "bold|large".
 *
 * @attrs Text attributes description string.
 * @tattr A pointer to tattr to be filled in.
 * @flags A bitwise or of GP_TATTR_FONT and GP_TATTR_HALIGN that enables
 *        parsing font and/or alignment.
 * @return Zero on success, non-zero on parsing failure.
 */
int gp_widget_tattr_parse(const char *attrs, gp_widget_tattr *tattr, int flags);
 
#endif /* GP_WIDGET_TATTR_H */