Package groovy.util

# Class IndentPrinter

java.lang.Object
groovy.util.IndentPrinter

    public class IndentPrinter
    extends Object

A helper class for printing indented text. This can be used stand-alone or, more commonly, from Builders.

By default, a PrintWriter to System.out is used as the Writer, but it is possible to change the Writer by passing a new one as a constructor argument.

Indention by default is 2 characters but can be changed by passing a different value as a constructor argument.

The following is an example usage. Note that within a "with" block you need to specify a parameter name so that this.println is not called instead of IndentPrinter.println:

     new IndentPrinter(new PrintWriter(out)).with { p ->
         p.printIndent()
         p.println('parent1')
         p.incrementIndent()
         p.printIndent()
         p.println('child 1')
         p.printIndent()
         p.println('child 2')
         p.decrementIndent()
         p.printIndent()
         p.println('parent2')
         p.flush()
     }

The above example prints this to standard output:

     parent1
       child 1
       child 2
     parent2

- ## Constructor Summary

  Constructors
  Constructor | Description
  --- | ---
  `IndentPrinter()` | Creates an IndentPrinter backed by a PrintWriter pointing to System.out, with an indent of two spaces.
  `IndentPrinter​(Writer out)` | Creates an IndentPrinter backed by the supplied Writer, with an indent of two spaces.
  `IndentPrinter​(Writer out, String indent)` | Creates an IndentPrinter backed by the supplied Writer, with a user-supplied String to be used for indenting.
  `IndentPrinter​(Writer out, String indent, boolean addNewlines)` | Creates an IndentPrinter backed by the supplied Writer, with a user-supplied String to be used for indenting and the ability to override newline handling.
  `IndentPrinter​(Writer out, String indent, boolean addNewlines, boolean autoIndent)` | Create an IndentPrinter to the given PrintWriter

- ## Method Summary

  Modifier and Type | Method | Description
  --- | --- | ---
  `void` | `decrementIndent()` |
  `void` | `flush()` |
  `boolean` | `getAutoIndent()` |
  `int` | `getIndentLevel()` |
  `void` | `incrementIndent()` |
  `void` | `print​(char c)` | Prints a character.
  `void` | `print​(String text)` | Prints a string.
  `void` | `printIndent()` | Prints the current indent level.
  `void` | `println()` | Prints an end-of-line character (if enabled via addNewLines property).
  `void` | `println​(String text)` | Prints a string followed by an end of line character.
  `void` | `setAutoIndent​(boolean autoIndent)` |
  `void` | `setIndentLevel​(int indentLevel)` |

  ### Methods inherited from class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Constructor Details

  - ### IndentPrinter

    public IndentPrinter()
    Creates an IndentPrinter backed by a PrintWriter pointing to System.out, with an indent of two spaces.
    See Also:
      `IndentPrinter(Writer, String)`

  - ### IndentPrinter

    public IndentPrinter​(Writer out)
    Creates an IndentPrinter backed by the supplied Writer, with an indent of two spaces.
    Parameters:
      `out` - Writer to output to
    See Also:
      `IndentPrinter(Writer, String)`

  - ### IndentPrinter

    public IndentPrinter​(Writer out, String indent)
    Creates an IndentPrinter backed by the supplied Writer, with a user-supplied String to be used for indenting.
    Parameters:
      `out` - Writer to output to
      `indent` - character(s) used to indent each line

  - ### IndentPrinter

    public IndentPrinter​(Writer out, String indent, boolean addNewlines)
    Creates an IndentPrinter backed by the supplied Writer, with a user-supplied String to be used for indenting and the ability to override newline handling.
    Parameters:
      `out` - Writer to output to
      `indent` - character(s) used to indent each line
      `addNewlines` - set to false to gobble all new lines (default true)

  - ### IndentPrinter

    public IndentPrinter​(Writer out, String indent, boolean addNewlines, boolean autoIndent)
    Create an IndentPrinter to the given PrintWriter
    Parameters:
      `out` - Writer to output to
      `indent` - character(s) used to indent each line
      `addNewlines` - set to false to gobble all new lines (default true)
      `autoIndent` - set to true to make println() prepend the indent automatically (default false)

- ## Method Details

  - ### println

    public void println​(String text)
    Prints a string followed by an end of line character.
    Parameters:
      `text` - String to be written

  - ### print

    public void print​(String text)
    Prints a string.
    Parameters:
      `text` - String to be written

  - ### print

    public void print​(char c)
    Prints a character.
    Parameters:
      `c` - char to be written

  - ### printIndent

    public void printIndent()
    Prints the current indent level.

  - ### println

    public void println()
    Prints an end-of-line character (if enabled via addNewLines property). Defaults to outputting a single '\n' character but by using a custom Writer, e.g. PlatformLineWriter, you can get platform-specific end-of-line characters.
    See Also:
      `IndentPrinter(Writer, String, boolean)`

  - ### incrementIndent

    public void incrementIndent()

  - ### decrementIndent

    public void decrementIndent()

  - ### getIndentLevel

    public int getIndentLevel()

  - ### setIndentLevel

    public void setIndentLevel​(int indentLevel)

  - ### getAutoIndent

    public boolean getAutoIndent()

  - ### setAutoIndent

    public void setAutoIndent​(boolean autoIndent)

  - ### flush

    public void flush()