gp_markup_builder.h

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// SPDX-License-Identifier: LGPL-2.1-or-later
/*
 * Copyright (C) 2022-2023 Cyril Hrubis <metan@ucw.cz>
 */
 
#ifndef UTILS_GP_MARKUP_BUILDER_H
#define UTILS_GP_MARKUP_BUILDER_H
 
#include <utils/gp_markup.h>
 
typedef struct gp_markup_builder {
        size_t glyph_cnt;
        gp_markup_glyph *glyphs;
} gp_markup_builder;
 
static inline void gp_markup_builder_glyph(gp_markup_builder *self,
                                           uint32_t glyph, uint8_t fmt, uint16_t fg_color)
{
        if (!self->glyphs)
                goto ret;
 
        self->glyphs[self->glyph_cnt].glyph = glyph;
        self->glyphs[self->glyph_cnt].fmt = fmt;
        self->glyphs[self->glyph_cnt].fg_color = fg_color;
 
ret:
        self->glyph_cnt++;
}
 
static inline void gp_markup_builder_space(gp_markup_builder *self, uint8_t fmt)
{
        if (!self->glyphs)
                goto ret;
 
        if (!self->glyph_cnt)
                return;
 
        if (self->glyphs[self->glyph_cnt-1].glyph == ' ' ||
            self->glyphs[self->glyph_cnt-1].glyph == '\n')
                return;
 
        self->glyphs[self->glyph_cnt].glyph = ' ';
        self->glyphs[self->glyph_cnt].fmt = fmt;
        self->glyphs[self->glyph_cnt].space_padd = 0;
 
ret:
        self->glyph_cnt++;
}
 
static inline void gp_markup_builder_newline(gp_markup_builder *self)
{
        if (!self->glyphs)
                goto ret;
 
        self->glyphs[self->glyph_cnt].glyph = '\n';
        self->glyphs[self->glyph_cnt].fmt = 0;
 
ret:
        self->glyph_cnt++;
}
 
static inline void gp_markup_builder_hline(gp_markup_builder *self)
{
        if (!self->glyphs)
                goto ret;
 
        self->glyphs[self->glyph_cnt].glyph = '\n';
        self->glyphs[self->glyph_cnt].fmt = GP_MARKUP_STRIKE;
 
ret:
        self->glyph_cnt++;
}
 
static inline void gp_markup_builder_finish(gp_markup_builder *self)
{
        if (!self->glyphs)
                return;
 
        if (self->glyph_cnt && self->glyphs[self->glyph_cnt - 1].glyph == ' ')
                self->glyph_cnt--;
 
        self->glyphs[self->glyph_cnt].glyph = 0;
        self->glyphs[self->glyph_cnt].fmt = 0;
}
 
static inline gp_markup *gp_markup_builder_alloc(gp_markup_builder *self)
{
        gp_markup *ret = malloc(sizeof(gp_markup) + sizeof(gp_markup_glyph) * (self->glyph_cnt + 1));
 
        if (!ret)
                return NULL;
 
        self->glyphs = ret->glyphs;
        self->glyph_cnt = 0;
 
        return ret;
}
 
#endif /* UTILS_GP_MARKUP_BUILDER_H */