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#include <stdbool.h>
#include "tasklist.h"
#include <parser.h>
#include <render.h>
#include <html.h>
#include "ext_scanners.h"
typedef enum {
CMARK_TASKLIST_NOCHECKED,
CMARK_TASKLIST_CHECKED,
} cmark_tasklist_type;
// Local constants
static const char *TYPE_STRING = "tasklist";
static const char *get_type_string(cmark_syntax_extension *extension, cmark_node *node) {
return TYPE_STRING;
}
// Return 1 if state was set, 0 otherwise
CMARK_GFM_EXPORT
int cmark_gfm_extensions_set_tasklist_item_checked(cmark_node *node, bool is_checked) {
// The node has to exist, and be an extension, and actually be the right type in order to get the value.
if (!node || !node->extension || strcmp(cmark_node_get_type_string(node), TYPE_STRING))
return 0;
node->as.list.checked = is_checked;
return 1;
}
CMARK_GFM_EXPORT
bool cmark_gfm_extensions_get_tasklist_item_checked(cmark_node *node) {
if (!node || !node->extension || strcmp(cmark_node_get_type_string(node), TYPE_STRING))
return false;
if (node->as.list.checked) {
return true;
}
else {
return false;
}
}
static bool parse_node_item_prefix(cmark_parser *parser, const char *input,
cmark_node *container) {
bool res = false;
if (parser->indent >=
container->as.list.marker_offset + container->as.list.padding) {
cmark_parser_advance_offset(parser, input, container->as.list.marker_offset +
container->as.list.padding,
true);
res = true;
} else if (parser->blank && container->first_child != NULL) {
// if container->first_child is NULL, then the opening line
// of the list item was blank after the list marker; in this
// case, we are done with the list item.
cmark_parser_advance_offset(parser, input, parser->first_nonspace - parser->offset,
false);
res = true;
}
return res;
}
static int matches(cmark_syntax_extension *self, cmark_parser *parser,
unsigned char *input, int len,
cmark_node *parent_container) {
return parse_node_item_prefix(parser, (const char*)input, parent_container);
}
static int can_contain(cmark_syntax_extension *extension, cmark_node *node,
cmark_node_type child_type) {
return (node->type == CMARK_NODE_ITEM) ? 1 : 0;
}
static cmark_node *open_tasklist_item(cmark_syntax_extension *self,
int indented, cmark_parser *parser,
cmark_node *parent_container,
unsigned char *input, int len) {
cmark_node_type node_type = cmark_node_get_type(parent_container);
if (node_type != CMARK_NODE_ITEM) {
return NULL;
}
bufsize_t matched = scan_tasklist(input, len, 0);
if (!matched) {
return NULL;
}
cmark_node_set_syntax_extension(parent_container, self);
cmark_parser_advance_offset(parser, (char *)input, 3, false);
// Either an upper or lower case X means the task is completed.
parent_container->as.list.checked = (strstr((char*)input, "[x]") || strstr((char*)input, "[X]"));
return NULL;
}
static void commonmark_render(cmark_syntax_extension *extension,
cmark_renderer *renderer, cmark_node *node,
cmark_event_type ev_type, int options) {
bool entering = (ev_type == CMARK_EVENT_ENTER);
if (entering) {
renderer->cr(renderer);
if (node->as.list.checked) {
renderer->out(renderer, node, "- [x] ", false, LITERAL);
} else {
renderer->out(renderer, node, "- [ ] ", false, LITERAL);
}
cmark_strbuf_puts(renderer->prefix, " ");
} else {
cmark_strbuf_truncate(renderer->prefix, renderer->prefix->size - 2);
renderer->cr(renderer);
}
}
static void html_render(cmark_syntax_extension *extension,
cmark_html_renderer *renderer, cmark_node *node,
cmark_event_type ev_type, int options) {
bool entering = (ev_type == CMARK_EVENT_ENTER);
if (entering) {
cmark_html_render_cr(renderer->html);
cmark_strbuf_puts(renderer->html, "<li");
cmark_html_render_sourcepos(node, renderer->html, options);
cmark_strbuf_putc(renderer->html, '>');
if (node->as.list.checked) {
cmark_strbuf_puts(renderer->html, "<input type=\"checkbox\" checked=\"\" disabled=\"\" /> ");
} else {
cmark_strbuf_puts(renderer->html, "<input type=\"checkbox\" disabled=\"\" /> ");
}
} else {
cmark_strbuf_puts(renderer->html, "</li>\n");
}
}
static const char *xml_attr(cmark_syntax_extension *extension,
cmark_node *node) {
if (node->as.list.checked) {
return " completed=\"true\"";
} else {
return " completed=\"false\"";
}
}
cmark_syntax_extension *create_tasklist_extension(void) {
cmark_syntax_extension *ext = cmark_syntax_extension_new("tasklist");
cmark_syntax_extension_set_match_block_func(ext, matches);
cmark_syntax_extension_set_get_type_string_func(ext, get_type_string);
cmark_syntax_extension_set_open_block_func(ext, open_tasklist_item);
cmark_syntax_extension_set_can_contain_func(ext, can_contain);
cmark_syntax_extension_set_commonmark_render_func(ext, commonmark_render);
cmark_syntax_extension_set_plaintext_render_func(ext, commonmark_render);
cmark_syntax_extension_set_html_render_func(ext, html_render);
cmark_syntax_extension_set_xml_attr_func(ext, xml_attr);
return ext;
}
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