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#include "parser.h"
#include <wctype.h>
enum TokenType {
DESCENDANT_OP,
PSEUDO_CLASS_SELECTOR_COLON,
ERROR_RECOVERY,
};
static inline void advance(TSLexer *lexer) { lexer->advance(lexer, false); }
static inline void skip(TSLexer *lexer) { lexer->advance(lexer, true); }
void *tree_sitter_css_external_scanner_create() { return NULL; }
void tree_sitter_css_external_scanner_destroy(void *payload) {}
unsigned tree_sitter_css_external_scanner_serialize(void *payload, char *buffer) { return 0; }
void tree_sitter_css_external_scanner_deserialize(void *payload, const char *buffer, unsigned length) {}
bool tree_sitter_css_external_scanner_scan(void *payload, TSLexer *lexer, const bool *valid_symbols) {
if (valid_symbols[ERROR_RECOVERY]) {
return false;
}
if (iswspace(lexer->lookahead) && valid_symbols[DESCENDANT_OP]) {
lexer->result_symbol = DESCENDANT_OP;
lexer->advance(lexer, true);
while (iswspace(lexer->lookahead)) {
lexer->advance(lexer, true);
}
lexer->mark_end(lexer);
if (lexer->lookahead == '#' || lexer->lookahead == '.' || lexer->lookahead == '[' || lexer->lookahead == '-' ||
lexer->lookahead == '*' || iswalnum(lexer->lookahead)) {
return true;
}
if (lexer->lookahead == ':') {
lexer->advance(lexer, false);
if (iswspace(lexer->lookahead)) {
return false;
}
for (;;) {
if (lexer->lookahead == ';' || lexer->lookahead == '}' || lexer->eof(lexer)) {
return false;
}
if (lexer->lookahead == '{') {
return true;
}
lexer->advance(lexer, false);
}
}
}
if (valid_symbols[PSEUDO_CLASS_SELECTOR_COLON]) {
while (iswspace(lexer->lookahead)) {
lexer->advance(lexer, true);
}
if (lexer->lookahead == ':') {
advance(lexer);
if (lexer->lookahead == ':') {
return false;
}
lexer->mark_end(lexer);
// We need a { to be a pseudo class selector, a ; indicates a property
while (lexer->lookahead != ';' && lexer->lookahead != '\'' && lexer->lookahead != '}' &&
!lexer->eof(lexer)) {
advance(lexer);
if (lexer->lookahead == '{') {
lexer->result_symbol = PSEUDO_CLASS_SELECTOR_COLON;
return true;
}
}
return false;
}
}
return false;
}
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