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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"
#include "houdini.h"
// Functions to convert cmark_nodes to XML strings.
static void escape_xml(cmark_strbuf *dest, const unsigned char *source, int length)
{
if (source != NULL) {
if (length < 0)
length = strlen((char *)source);
houdini_escape_html0(dest, source, (size_t)length, 0);
}
}
struct render_state {
cmark_strbuf* xml;
int indent;
};
static inline void indent(struct render_state *state)
{
int i;
for (i = 0; i < state->indent; i++) {
cmark_strbuf_putc(state->xml, ' ');
}
}
static int
S_render_node(cmark_node *node, cmark_event_type ev_type, void *vstate)
{
struct render_state *state = vstate;
cmark_strbuf *xml = state->xml;
bool literal = false;
bool entering = (ev_type == CMARK_EVENT_ENTER);
if (entering) {
indent(state);
cmark_strbuf_printf(xml, "<%s", cmark_node_type_string(node));
if (node->start_line != 0) {
cmark_strbuf_printf(xml, " sourcepos=\"%d:%d-%d\"",
node->start_line,
node->start_column,
node->end_line);
}
literal = false;
switch (node->type) {
case CMARK_NODE_TEXT:
case CMARK_NODE_CODE:
case CMARK_NODE_HTML:
case CMARK_NODE_INLINE_HTML:
cmark_strbuf_puts(xml, ">");
escape_xml(xml, node->as.literal.data,
node->as.literal.len);
cmark_strbuf_puts(xml, "</");
cmark_strbuf_puts(xml, cmark_node_type_string(node));
literal = true;
break;
case CMARK_NODE_CODE_BLOCK:
if (node->as.code.info.len > 0) {
cmark_strbuf_puts(xml, " info=\"");
escape_xml(xml, node->as.code.info.data,
node->as.code.info.len);
cmark_strbuf_putc(xml, '"');
}
cmark_strbuf_puts(xml, ">");
escape_xml(xml, node->as.code.literal.data,
node->as.code.literal.len);
cmark_strbuf_puts(xml, "</");
cmark_strbuf_puts(xml, cmark_node_type_string(node));
literal = true;
break;
case CMARK_NODE_LINK:
case CMARK_NODE_IMAGE:
cmark_strbuf_puts(xml, " url=\"");
escape_xml(xml, node->as.link.url, -1);
cmark_strbuf_putc(xml, '"');
cmark_strbuf_puts(xml, " title=\"");
escape_xml(xml, node->as.link.title, -1);
cmark_strbuf_putc(xml, '"');
break;
default:
break;
}
if (node->first_child) {
state->indent += 2;
} else if (!literal) {
cmark_strbuf_puts(xml, " /");
}
} else {
if (node->first_child) {
state->indent -= 2;
}
indent(state);
cmark_strbuf_printf(xml, "</%s", cmark_node_type_string(node));
}
// TODO print attributes
cmark_strbuf_puts(xml, ">\n");
return 1;
}
char *cmark_render_xml(cmark_node *root)
{
char *result;
cmark_strbuf xml = GH_BUF_INIT;
cmark_event_type ev_type;
cmark_node *cur;
struct render_state state = { &xml, 0 };
cmark_iter *iter = cmark_iter_new(root);
cmark_strbuf_puts(state.xml,
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
cmark_strbuf_puts(state.xml,
"<!DOCTYPE CommonMark SYSTEM \"CommonMark.dtd\">\n");
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 *)cmark_strbuf_detach(&xml);
cmark_iter_free(iter);
cmark_strbuf_free(&xml);
return result;
}
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