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sundown/html/html.c  view on Meta::CPAN

rndr_normal_text(struct buf *ob, const struct buf *text, void *opaque)
{
	if (text)
		escape_html(ob, text->data, text->size);
}

static void
toc_header(struct buf *ob, const struct buf *text, int level, void *opaque)
{
	struct html_renderopt *options = opaque;

	/* set the level offset if this is the first header
	 * we're parsing for the document */
	if (options->toc_data.current_level == 0) {
		options->toc_data.level_offset = level - 1;
	}
	level -= options->toc_data.level_offset;

	if (level > options->toc_data.current_level) {
		while (level > options->toc_data.current_level) {
			BUFPUTSL(ob, "<ul>\n<li>\n");
			options->toc_data.current_level++;
		}
	} else if (level < options->toc_data.current_level) {
		BUFPUTSL(ob, "</li>\n");
		while (level < options->toc_data.current_level) {
			BUFPUTSL(ob, "</ul>\n</li>\n");
			options->toc_data.current_level--;
		}
		BUFPUTSL(ob,"<li>\n");
	} else {
		BUFPUTSL(ob,"</li>\n<li>\n");
	}

	bufprintf(ob, "<a href=\"#toc_%d\">", options->toc_data.header_count++);
	if (text)
		escape_html(ob, text->data, text->size);
	BUFPUTSL(ob, "</a>\n");
}

static int
toc_link(struct buf *ob, const struct buf *link, const struct buf *title, const struct buf *content, void *opaque)
{
	if (content && content->size)
		bufput(ob, content->data, content->size);
	return 1;
}

static void
toc_finalize(struct buf *ob, void *opaque)
{
	struct html_renderopt *options = opaque;

	while (options->toc_data.current_level > 0) {
		BUFPUTSL(ob, "</li>\n</ul>\n");
		options->toc_data.current_level--;
	}
}

void
sdhtml_toc_renderer(struct sd_callbacks *callbacks, struct html_renderopt *options)
{
	static const struct sd_callbacks cb_default = {
		NULL,
		NULL,
		NULL,
		toc_header,
		NULL,
		NULL,
		NULL,
		NULL,
		NULL,
		NULL,
		NULL,

		NULL,
		rndr_codespan,
		rndr_double_emphasis,
		rndr_emphasis,
		NULL,
		NULL,
		toc_link,
		NULL,
		rndr_triple_emphasis,
		rndr_strikethrough,
		rndr_superscript,

		NULL,
		NULL,

		NULL,
		toc_finalize,
	};

	memset(options, 0x0, sizeof(struct html_renderopt));
	options->flags = HTML_TOC;

	memcpy(callbacks, &cb_default, sizeof(struct sd_callbacks));
}

void
sdhtml_renderer(struct sd_callbacks *callbacks, struct html_renderopt *options, unsigned int render_flags)
{
	static const struct sd_callbacks cb_default = {
		rndr_blockcode,
		rndr_blockquote,
		rndr_raw_block,
		rndr_header,
		rndr_hrule,
		rndr_list,
		rndr_listitem,
		rndr_paragraph,
		rndr_table,
		rndr_tablerow,
		rndr_tablecell,

		rndr_autolink,
		rndr_codespan,
		rndr_double_emphasis,
		rndr_emphasis,
		rndr_image,
		rndr_linebreak,
		rndr_link,
		rndr_raw_html,
		rndr_triple_emphasis,
		rndr_strikethrough,
		rndr_superscript,

		NULL,
		rndr_normal_text,

		NULL,
		NULL,
	};

	/* Prepare the options pointer */
	memset(options, 0x0, sizeof(struct html_renderopt));
	options->flags = render_flags;

	/* Prepare the callbacks */
	memcpy(callbacks, &cb_default, sizeof(struct sd_callbacks));

	if (render_flags & HTML_SKIP_IMAGES)
		callbacks->image = NULL;

	if (render_flags & HTML_SKIP_LINKS) {
		callbacks->link = NULL;
		callbacks->autolink = NULL;
	}

	if (render_flags & HTML_SKIP_HTML || render_flags & HTML_ESCAPE)
		callbacks->blockhtml = NULL;
}