Added end position calculation

src/Formatter.php

@@ -32,7 +32,17 @@ class Formatter
         if ($content === $new) {
             return [];
         }
-        return [new TextEdit(new Range(new Position(0, 0), new Position(PHP_INT_MAX, PHP_INT_MAX)), $new)];
+        return [new TextEdit(new Range(new Position(0, 0), $this->calculateEndPosition($content)), $new)];
+    }
+
+    /**
+     * @param string $content
+     * @return \LanguageServer\Protocol\Position
+     */
+    private function calculateEndPosition(string $content): Position
+    {
+        $lines = explode("\n", $content);
+        return new Position(sizeof($lines) - 1, strlen(end($lines)));
     }
     
     /**

tests/Server/TextDocument/FormattingTest.php

@@ -47,8 +47,8 @@ class FormattingTest extends TestCase
                     'character' => 0
                 ],
                 'end' => [
-                    'line' => PHP_INT_MAX,
+                    'line' => 20,
-                    'character' => PHP_INT_MAX
+                    'character' => 0
                 ]
             ],
             'newText' => $expected