react-diff-view/esm/tokenize/pickRanges.js

A git diff component to consume the git unified diff output.

/**
 * @file 在高亮的语法节点上插入代码定义与引用的信息
 * @author zhanglili
 */
import { isEmpty, groupBy } from 'lodash';
import { leafOf, split } from './utils';
const splitPathToEncloseRange = (paths, node) => {
    const { start, length } = node;
    const rangeEnd = start + length;
    const [output] = paths.reduce(([output, nodeStart], path) => {
        const leaf = leafOf(path);
        const nodeEnd = nodeStart + leaf.value.length;
        if (nodeStart > rangeEnd || nodeEnd < start) {
            output.push(path);
        }
        else {
            const segments = split(path, start - nodeStart, rangeEnd - nodeStart, node);
            output.push(...segments);
        }
        return [output, nodeEnd];
    }, [[], 0]);
    return output;
};
function pickRangesFromPath(paths, ranges) {
    if (isEmpty(ranges)) {
        return paths;
    }
    return ranges.reduce(splitPathToEncloseRange, paths);
}
function process(linesOfPaths, ranges) {
    const rangesByLine = groupBy(ranges, 'lineNumber');
    return linesOfPaths.map((line, i) => pickRangesFromPath(line, rangesByLine[i + 1]));
}
export default function pickRanges(oldRanges, newRanges) {
    return ([oldLinesOfPaths, newLinesOfPaths]) => [
        process(oldLinesOfPaths, oldRanges),
        process(newLinesOfPaths, newRanges),
    ];
}
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