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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"
#define BUFFER_SIZE 100
// Functions to convert cmark_nodes to XML strings.
static void escape_xml(cmark_strbuf *dest, const unsigned char *source,
bufsize_t length) {
houdini_escape_html0(dest, source, length, 0);
}
struct render_state {
cmark_strbuf *xml;
int indent;
};
static CMARK_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,
struct render_state *state, int options) {
cmark_strbuf *xml = state->xml;
bool literal = false;
cmark_delim_type delim;
bool entering = (ev_type == CMARK_EVENT_ENTER);
char buffer[BUFFER_SIZE];
if (entering) {
indent(state);
cmark_strbuf_putc(xml, '<');
cmark_strbuf_puts(xml, cmark_node_get_type_string(node));
if (options & CMARK_OPT_SOURCEPOS && node->start_line != 0) {
snprintf(buffer, BUFFER_SIZE, " sourcepos=\"%d:%d-%d:%d\"",
node->start_line, node->start_column, node->end_line,
node->end_column);
cmark_strbuf_puts(xml, buffer);
}
literal = false;
switch (node->type) {
case CMARK_NODE_DOCUMENT:
cmark_strbuf_puts(xml, " xmlns=\"http://commonmark.org/xml/1.0\"");
break;
case CMARK_NODE_TEXT:
case CMARK_NODE_CODE:
case CMARK_NODE_HTML_BLOCK:
case CMARK_NODE_HTML_INLINE:
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_get_type_string(node));
literal = true;
break;
case CMARK_NODE_LIST:
switch (cmark_node_get_list_type(node)) {
case CMARK_ORDERED_LIST:
cmark_strbuf_puts(xml, " type=\"ordered\"");
snprintf(buffer, BUFFER_SIZE, " start=\"%d\"",
cmark_node_get_list_start(node));
cmark_strbuf_puts(xml, buffer);
delim = cmark_node_get_list_delim(node);
if (delim == CMARK_PAREN_DELIM) {
cmark_strbuf_puts(xml, " delim=\"paren\"");
} else if (delim == CMARK_PERIOD_DELIM) {
cmark_strbuf_puts(xml, " delim=\"period\"");
}
break;
case CMARK_BULLET_LIST:
cmark_strbuf_puts(xml, " type=\"bullet\"");
break;
default:
break;
}
snprintf(buffer, BUFFER_SIZE, " tight=\"%s\"",
(cmark_node_get_list_tight(node) ? "true" : "false"));
cmark_strbuf_puts(xml, buffer);
break;
case CMARK_NODE_HEADING:
snprintf(buffer, BUFFER_SIZE, " level=\"%d\"", node->as.heading.level);
cmark_strbuf_puts(xml, buffer);
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_get_type_string(node));
literal = true;
break;
case CMARK_NODE_CUSTOM_BLOCK:
case CMARK_NODE_CUSTOM_INLINE:
cmark_strbuf_puts(xml, " on_enter=\"");
escape_xml(xml, node->as.custom.on_enter.data,
node->as.custom.on_enter.len);
cmark_strbuf_putc(xml, '"');
cmark_strbuf_puts(xml, " on_exit=\"");
escape_xml(xml, node->as.custom.on_exit.data,
node->as.custom.on_exit.len);
cmark_strbuf_putc(xml, '"');
break;
case CMARK_NODE_LINK:
case CMARK_NODE_IMAGE:
cmark_strbuf_puts(xml, " destination=\"");
escape_xml(xml, node->as.link.url.data, node->as.link.url.len);
cmark_strbuf_putc(xml, '"');
cmark_strbuf_puts(xml, " title=\"");
escape_xml(xml, node->as.link.title.data, node->as.link.title.len);
cmark_strbuf_putc(xml, '"');
break;
default:
break;
}
if (node->first_child) {
state->indent += 2;
} else if (!literal) {
cmark_strbuf_puts(xml, " /");
}
cmark_strbuf_puts(xml, ">\n");
} else if (node->first_child) {
state->indent -= 2;
indent(state);
cmark_strbuf_puts(xml, "</");
cmark_strbuf_puts(xml, cmark_node_get_type_string(node));
cmark_strbuf_puts(xml, ">\n");
}
return 1;
}
char *cmark_render_xml(cmark_node *root, int options) {
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 document 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, options);
}
result = (char *)cmark_strbuf_detach(&xml);
cmark_iter_free(iter);
return result;
}
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