Class: Opal::Fragment

Inherits:
Object
  • Object
show all
Defined in:
opal/lib/opal/fragment.rb

Overview

A fragment holds a string of generated javascript that will be written to the destination. It also keeps hold of the original sexp from which it was generated. Using this sexp, when writing fragments in order, a mapping can be created of the original location => target location, aka, source-maps!

These are generated by nodes, so will not have to create directly.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(code, scope, sexp = nil) ⇒ Fragment

Create fragment with javascript code and optional original [Opal::Sexp].

Parameters:

  • code (String)

    javascript code

  • sexp (Opal::Sexp) (defaults to: nil)

    sexp used for creating fragment


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# File 'opal/lib/opal/fragment.rb', line 20

def initialize(code, scope, sexp = nil)
  @code = code.to_s
  @sexp = sexp
  @scope = scope
end

Instance Attribute Details

#codeString (readonly)

String of javascript this fragment holds

Returns:

  • (String)

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# File 'opal/lib/opal/fragment.rb', line 14

def code
  @code
end

Instance Method Details

#columnInteger?

Original column this fragment was created from

Returns:

  • (Integer, nil)

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# File 'opal/lib/opal/fragment.rb', line 64

def column
  @sexp.column if @sexp
end

#inspectObject

Inspect the contents of this fragment, f("fooo")


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# File 'opal/lib/opal/fragment.rb', line 27

def inspect
  "f(#{@code.inspect})"
end

#lineInteger?

Original line this fragment was created from

Returns:

  • (Integer, nil)

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# File 'opal/lib/opal/fragment.rb', line 58

def line
  @sexp.line if @sexp
end

#source_map_nameObject


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# File 'opal/lib/opal/fragment.rb', line 31

def source_map_name
  case @sexp.type
  when :top, :begin, :newline, :js_return
    nil
  when :self
    'self'
  when :module
    'module'
  when :class
    'class'
  when :int
    @sexp.children.first
  when :def
    @sexp.children.first
  when :defs
    @sexp.children[1]
  when :send
    @sexp.children[1]
  when :lvar, :lvasgn, :lvdeclare, :ivar, :ivasgn, :gvar, :cvar, :cvasgn, :gvars, :gvasgn
    @sexp.children.first
  else
    # nil
  end
end