修改禁引可视域

‘liusuyi’

2023-10-30 3c450768402293d86350e8420f365210c83233fa

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var List = require('../common/List');
 
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) {
            var start = getFirstMatchNode(matchNode);
            var end = getLastMatchNode(matchNode);
 
            lexer.syntax.walk(ast, function(node, item, list) {
                if (node === start) {
                    var nodes = new List();
 
                    do {
                        nodes.appendData(item.data);
 
                        if (item.data === end) {
                            break;
                        }
 
                        item = item.next;
                    } while (item !== null);
 
                    fragments.push({
                        parent: list,
                        nodes: nodes
                    });
                }
            });
        }
 
        if (Array.isArray(matchNode.match)) {
            matchNode.match.forEach(findFragments);
        }
    }
 
    var fragments = [];
 
    if (match.matched !== null) {
        findFragments(match.matched);
    }
 
    return fragments;
}
 
module.exports = {
    matchFragments: matchFragments
};