65 lines
1.6 KiB
JavaScript
65 lines
1.6 KiB
JavaScript
'use strict';
|
|
|
|
const List = require('../utils/List.cjs');
|
|
|
|
function getFirstMatchNode(matchNode) {
|
|
if ('node' in matchNode) {
|
|
return matchNode.node;
|
|
}
|
|
|
|
return getFirstMatchNode(matchNode.match[0]);
|
|
}
|
|
|
|
function getLastMatchNode(matchNode) {
|
|
if ('node' in matchNode) {
|
|
return matchNode.node;
|
|
}
|
|
|
|
return getLastMatchNode(matchNode.match[matchNode.match.length - 1]);
|
|
}
|
|
|
|
function matchFragments(lexer, ast, match, type, name) {
|
|
function findFragments(matchNode) {
|
|
if (matchNode.syntax !== null &&
|
|
matchNode.syntax.type === type &&
|
|
matchNode.syntax.name === name) {
|
|
const start = getFirstMatchNode(matchNode);
|
|
const end = getLastMatchNode(matchNode);
|
|
|
|
lexer.syntax.walk(ast, function(node, item, list) {
|
|
if (node === start) {
|
|
const nodes = new List.List();
|
|
|
|
do {
|
|
nodes.appendData(item.data);
|
|
|
|
if (item.data === end) {
|
|
break;
|
|
}
|
|
|
|
item = item.next;
|
|
} while (item !== null);
|
|
|
|
fragments.push({
|
|
parent: list,
|
|
nodes
|
|
});
|
|
}
|
|
});
|
|
}
|
|
|
|
if (Array.isArray(matchNode.match)) {
|
|
matchNode.match.forEach(findFragments);
|
|
}
|
|
}
|
|
|
|
const fragments = [];
|
|
|
|
if (match.matched !== null) {
|
|
findFragments(match.matched);
|
|
}
|
|
|
|
return fragments;
|
|
}
|
|
|
|
exports.matchFragments = matchFragments;
|