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Class: PrettyPrint::SingleLine

Inherits:
Object
  • Object
  • PrettyPrint::SingleLine
show all
Defined in:
opal/stdlib/prettyprint.rb

Overview

PrettyPrint::SingleLine is used by PrettyPrint.singleline_format

It is passed to be similar to a PrettyPrint object itself, by responding to:

  • #text
  • #breakable
  • #nest
  • #group
  • #flush
  • #first?

but instead, the output has no line breaks

Direct Known Subclasses

PP::SingleLine

Instance Method Summary collapse

Constructor Details

#initialize(output, maxwidth = nil, newline = nil) ⇒ SingleLine

Create a PrettyPrint::SingleLine object

Arguments:

  • +output+ - String (or similar) to store rendered text. Needs to respond to '<<'
  • +maxwidth+ - Argument position expected to be here for compatibility. This argument is a noop.
  • +newline+ - Argument position expected to be here for compatibility. This argument is a noop.
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# File 'opal/stdlib/prettyprint.rb', line 503
def initialize(output, maxwidth=nil, newline=nil)
 @output = output
 @first = [true]
end

Instance Method Details

#breakable(sep = ' ', width = nil) ⇒ Object

Appends +sep+ to the text to be output. By default +sep+ is ' '

+width+ argument is here for compatibility. It is a noop argument.

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# File 'opal/stdlib/prettyprint.rb', line 518
def breakable(sep='', width=nil)
 @output << sep
end

#first? ⇒ Boolean

This is used as a predicate, and ought to be called first.

Returns:

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# File 'opal/stdlib/prettyprint.rb', line 550
def first?
 result = @first[-1]
 @first[-1] = false
 result
end

#flush ⇒ Object

Method present for compatibility, but is a noop

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# File 'opal/stdlib/prettyprint.rb', line 546
def flush # :nodoc:
end

#group(indent = nil, open_obj = '', close_obj = '', open_width = nil, close_width = nil) ⇒ Object

Opens a block for grouping objects to be pretty printed.

Arguments:

  • +indent+ - noop argument. Present for compatibility.
  • +open_obj+ - text appended before the &blok. Default is ''
  • +close_obj+ - text appended after the &blok. Default is ''
  • +open_width+ - noop argument. Present for compatibility.
  • +close_width+ - noop argument. Present for compatibility.
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# File 'opal/stdlib/prettyprint.rb', line 537
def group(indent=nil, open_obj='', close_obj='', open_width=nil, close_width=nil)
 @first.push true
 @output << open_obj
 yield
 @output << close_obj
 @first.pop
end

#nest(indent) ⇒ Object

Takes +indent+ arg, but does nothing with it.

Yields to a block.

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# File 'opal/stdlib/prettyprint.rb', line 525
def nest(indent) # :nodoc:
 yield
end

#text(obj, width = nil) ⇒ Object

Add +obj+ to the text to be output.

+width+ argument is here for compatibility. It is a noop argument.

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# File 'opal/stdlib/prettyprint.rb', line 511
def text(obj, width=nil)
 @output << obj
end

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