yaml-unist-parser/lib/transforms/content.js

A YAML parser that produces output compatible with unist

import { PropLeadingCharacter } from "../constants.js";
import { createAnchor } from "../factories/anchor.js";
import { createComment } from "../factories/comment.js";
import { createContent } from "../factories/content.js";
import { createTag } from "../factories/tag.js";
export function transformContent(node, context, isNotMiddleComment = () => false) {
    const cstNode = node.cstNode;
    const middleComments = [];
    let firstTagOrAnchorRange = null;
    let tag = null;
    let anchor = null;
    for (const propRange of cstNode.props) {
        const leadingChar = context.text[propRange.origStart];
        switch (leadingChar) {
            case PropLeadingCharacter.Tag:
                firstTagOrAnchorRange = firstTagOrAnchorRange || propRange;
                tag = createTag(context.transformRange(propRange), node.tag);
                break;
            case PropLeadingCharacter.Anchor:
                firstTagOrAnchorRange = firstTagOrAnchorRange || propRange;
                anchor = createAnchor(context.transformRange(propRange), cstNode.anchor);
                break;
            case PropLeadingCharacter.Comment: {
                const comment = createComment(context.transformRange(propRange), context.text.slice(propRange.origStart + 1, propRange.origEnd));
                context.comments.push(comment);
                if (!isNotMiddleComment(comment) &&
                    firstTagOrAnchorRange &&
                    firstTagOrAnchorRange.origEnd <= propRange.origStart &&
                    propRange.origEnd <= cstNode.valueRange.origStart) {
                    middleComments.push(comment);
                }
                break;
            }
            // istanbul ignore next
            default:
                throw new Error(`Unexpected leading character ${JSON.stringify(leadingChar)}`);
        }
    }
    return createContent(tag, anchor, middleComments);
}