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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "config.h"
#include "cmark.h"
#include "node.h"
#include "buffer.h"
// Functions to convert cmark_nodes to groff man strings.
static void escape_man(strbuf *dest, const unsigned char *source, int length)
{
int i;
unsigned char c;
for (i = 0; i < length; i++) {
c = source[i];
if (c == '.' && i == 0) {
strbuf_puts(dest, "\\&.");
} else if (c == '\'' && i == 0) {
strbuf_puts(dest, "\\&'");
} else if (c == '-') {
strbuf_puts(dest, "\\-");
} else if (c == '\\') {
strbuf_puts(dest, "\\e");
} else {
strbuf_putc(dest, source[i]);
}
}
}
static inline void cr(strbuf *man)
{
if (man->size && man->ptr[man->size - 1] != '\n')
strbuf_putc(man, '\n');
}
struct render_state {
strbuf* man;
cmark_node *plain;
};
static int
S_render_node(cmark_node *node, cmark_event_type ev_type, void *vstate)
{
struct render_state *state = vstate;
cmark_node *tmp;
strbuf *man = state->man;
int list_number;
bool entering = (ev_type == CMARK_EVENT_ENTER);
if (state->plain == node) { // back at original node
state->plain = NULL;
}
if (state->plain != NULL) {
switch(node->type) {
case CMARK_NODE_TEXT:
case CMARK_NODE_CODE:
escape_man(man, node->as.literal.data,
node->as.literal.len);
break;
case CMARK_NODE_LINEBREAK:
case CMARK_NODE_SOFTBREAK:
strbuf_putc(man, ' ');
break;
default:
break;
}
return 1;
}
switch (node->type) {
case CMARK_NODE_DOCUMENT:
break;
case CMARK_NODE_BLOCK_QUOTE:
if (entering) {
cr(man);
strbuf_puts(man, ".RS");
cr(man);
} else {
cr(man);
strbuf_puts(man, ".RE");
cr(man);
}
break;
case CMARK_NODE_LIST:
break;
case CMARK_NODE_LIST_ITEM:
if (entering) {
cr(man);
strbuf_puts(man, ".IP ");
if (cmark_node_get_list_type(node->parent) ==
CMARK_BULLET_LIST) {
strbuf_puts(man, "\\[bu] 2");
} else {
list_number = cmark_node_get_list_start(node->parent);
tmp = node;
while (tmp->prev) {
tmp = tmp->prev;
list_number += 1;
}
strbuf_printf(man, "\"%d.\" 4", list_number);
}
cr(man);
} else {
cr(man);
}
break;
case CMARK_NODE_HEADER:
if (entering) {
cr(man);
strbuf_puts(man,
cmark_node_get_header_level(node) == 1 ?
".SH" : ".SS");
cr(man);
} else {
cr(man);
}
break;
case CMARK_NODE_CODE_BLOCK:
cr(man);
strbuf_puts(man, ".IP\n.nf\n\\f[C]\n");
escape_man(man, node->as.literal.data,
node->as.literal.len);
cr(man);
strbuf_puts(man, "\\f[]\n.fi");
cr(man);
break;
case CMARK_NODE_HTML:
break;
case CMARK_NODE_HRULE:
cr(man);
strbuf_puts(man, ".PP\n * * * * *");
cr(man);
break;
case CMARK_NODE_PARAGRAPH:
if (entering) {
// no blank line if first paragraph in list:
if (node->parent &&
node->parent->type == CMARK_NODE_LIST_ITEM &&
node->prev == NULL) {
// no blank line or .PP
} else {
cr(man);
strbuf_puts(man, ".PP\n");
}
} else {
cr(man);
}
break;
case CMARK_NODE_TEXT:
escape_man(man, node->as.literal.data,
node->as.literal.len);
break;
case CMARK_NODE_LINEBREAK:
strbuf_puts(man, ".PD 0\n.P\n.PD");
cr(man);
break;
case CMARK_NODE_SOFTBREAK:
strbuf_putc(man, '\n');
break;
case CMARK_NODE_CODE:
strbuf_puts(man, "\\f[C]");
escape_man(man, node->as.literal.data, node->as.literal.len);
strbuf_puts(man, "\\f[]");
break;
case CMARK_NODE_INLINE_HTML:
break;
case CMARK_NODE_STRONG:
if (entering) {
strbuf_puts(man, "\\f[B]");
} else {
strbuf_puts(man, "\\f[]");
}
break;
case CMARK_NODE_EMPH:
if (entering) {
strbuf_puts(man, "\\f[I]");
} else {
strbuf_puts(man, "\\f[]");
}
break;
case CMARK_NODE_LINK:
if (!entering) {
strbuf_printf(man, " (%s)",
cmark_node_get_url(node));
}
break;
case CMARK_NODE_IMAGE:
if (entering) {
strbuf_puts(man, "[IMAGE: ");
state->plain = node;
} else {
strbuf_puts(man, "]");
}
break;
default:
assert(false);
break;
}
// strbuf_putc(man, 'x');
return 1;
}
char *cmark_render_man(cmark_node *root)
{
char *result;
strbuf man = GH_BUF_INIT;
struct render_state state = { &man, NULL };
cmark_node *cur;
cmark_event_type ev_type;
cmark_iter *iter = cmark_iter_new(root);
while ((ev_type = cmark_iter_next(iter)) != CMARK_EVENT_DONE) {
cur = cmark_iter_get_node(iter);
S_render_node(cur, ev_type, &state);
}
result = (char *)strbuf_detach(&man);
cmark_iter_free(iter);
strbuf_free(&man);
return result;
}
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