eclint/dist/rules/indent_size.js

Validate or fix code that doesn't adhere to EditorConfig settings or infer settings from existing code.

"use strict";
var EditorConfigError = require("../editor-config-error");
var RE_LEADING_SPACES = /^ *$/;
function getNumber(num, fallback) {
    num = +num;
    if (isNaN(num)) {
        return fallback && fallback();
    }
    return num;
}
function resolve(settings) {
    var result = (settings.indent_size === 'tab')
        ? settings.tab_width
        : settings.indent_size;
    return getNumber(result, getNumber.bind(this, settings.tab_width));
}
function checkLine(line, indentSize) {
    if (!line.prefix ||
        !RE_LEADING_SPACES.test(line.prefix) ||
        (line.blockCommentStart &&
            line.prefix.length === (line.blockCommentStart.prefix.length + line.padSize))) {
        return;
    }
    var softTabCount = line.prefix.length / indentSize;
    if (indentSize % 2) {
        softTabCount = Math.floor(softTabCount);
    }
    else {
        softTabCount = Math.round(softTabCount);
    }
    var expectedIndentSize = softTabCount * indentSize;
    if (line.prefix.length !== expectedIndentSize) {
        var error = new EditorConfigError('invalid indent size: %s, expected: %s', line.prefix.length, expectedIndentSize);
        error.lineNumber = line.number;
        error.rule = 'indent_size';
        error.source = line.text;
        return error;
    }
}
function check(settings, document) {
    if (settings.indent_style === 'tab') {
        return [];
    }
    var indentSize = resolve(settings);
    if (indentSize) {
        return document.lines.map(function (line) {
            return checkLine(line, indentSize);
        }).filter(Boolean);
    }
    return [];
}
function fix(_settings, document) {
    return document; // noop
}
function infer(document) {
    var scores = {};
    var lastIndentSize = 0;
    var lastLeadingSpacesLength = 0;
    function vote(leadingSpacesLength) {
        if (leadingSpacesLength) {
            lastIndentSize = Math.abs(leadingSpacesLength - lastLeadingSpacesLength) || lastIndentSize;
            if (lastIndentSize > 1) {
                scores[lastIndentSize] = scores[lastIndentSize] || 0;
                scores[lastIndentSize]++;
            }
        }
        else {
            lastIndentSize = 0;
        }
        lastLeadingSpacesLength = leadingSpacesLength;
    }
    document.lines.forEach(function (line) {
        if (!line.isBlockComment && line.string && RE_LEADING_SPACES.test(line.prefix)) {
            vote(line.prefix.length);
        }
    });
    var bestScore = 0;
    var result = 0;
    for (var indentSize in scores) {
        var score = scores[indentSize];
        if (score > bestScore) {
            bestScore = score;
            result = +indentSize;
        }
    }
    return result;
}
var IndentSizeRule = {
    check: check,
    fix: fix,
    infer: infer,
    resolve: resolve,
    type: 'DocumentRule',
};
module.exports = IndentSizeRule;
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