added Helpers::tabsToSpaces()

Author: dg

readme.md

@@ -137,6 +137,22 @@ class Demo
 }
 ```
 
+Tabs versus spaces
+------------------
+
+The generated code uses tabs for indentation, which makes it very easy to change it to any number of spaces:
+
+```php
+use Nette\PhpGenerator\Helpers;
+
+$class = new Nette\PhpGenerator\ClassType('Demo');
+// ...
+
+echo Helpers::tabsToSpaces((string) $class); // 4 spaces indentation
+echo Helpers::tabsToSpaces((string) $class, 2); // 2 spaces indentation
+```
+
+
 Literals
 --------
 

src/PhpGenerator/Helpers.php

@@ -261,4 +261,10 @@ public static function extractShortName(string $name): string
 	{
 		return ($pos = strrpos($name, '\\')) === false ? $name : substr($name, $pos + 1);
 	}
+
+
+	public static function tabsToSpaces(string $s, int $count = self::INDENT_LENGTH): string
+	{
+		return str_replace("\t", str_repeat(' ', $count), $s);
+	}
 }

tests/PhpGenerator/Helpers.dump().phpt

@@ -29,6 +29,7 @@ Assert::same('false', Helpers::dump(false));
 
 Assert::same("''", Helpers::dump(''));
 Assert::same("'Hello'", Helpers::dump('Hello'));
+Assert::same('"\t\n\t"', Helpers::dump("\t\n\t"));
 Assert::same("'I\u{F1}t\u{EB}rn\u{E2}ti\u{F4}n\u{E0}liz\u{E6}ti\u{F8}n'", Helpers::dump("I\u{F1}t\u{EB}rn\u{E2}ti\u{F4}n\u{E0}liz\u{E6}ti\u{F8}n")); // Iñtërnâtiônàlizætiøn
 Assert::same('"\rHello \$"', Helpers::dump("\rHello $"));
 Assert::same("'He\\llo'", Helpers::dump('He\llo'));

tests/PhpGenerator/Helpers.tabsToSpaces().phpt

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+use Nette\PhpGenerator\Helpers;
+use Tester\Assert;
+
+
+require __DIR__ . '/../bootstrap.php';
+
+
+Assert::same('', Helpers::tabsToSpaces(''));
+Assert::same("\n  \n  ", Helpers::tabsToSpaces("\n  \n  "));
+Assert::same("\n        a\n    b", Helpers::tabsToSpaces("\n\t\ta\n\tb"));
+Assert::same("\n        a\n    b\n", Helpers::tabsToSpaces("\n\t\ta\n\tb\n"));
+Assert::same("\n    a\n  b\n", Helpers::tabsToSpaces("\n\t\ta\n\tb\n", 2));