HTMLInstrumentation.js

HTMLInstrumentation.js

    function _getMarkerAtDocumentPos(editor, pos, preferParent, markCache) {
        var marks, match;

        markCache = markCache || {};
        marks = _getSortedTagMarks(editor._codeMirror.findMarksAt(pos), markCache);
        if (!marks.length) {
            return null;
        }

        // The mark with the latest start is the innermost one.
        match = marks[marks.length - 1];
        if (preferParent) {
            // If the match is exactly at the edge of the range and preferParent is set,
            // we want to pop upwards.
            if (_posEq(match.range.from, pos) || _posEq(match.range.to, pos)) {
                if (marks.length > 1) {
                    match = marks[marks.length - 2];
                } else {
                    // We must be outside the root, so there's no containing tag.
                    match = null;
                }
            }
        }

        return match.mark;
    }