Class: PSD::Resources

Inherits:
Object
  • Object
show all
Includes:
Section
Defined in:
lib/psd/resources.rb

Overview

Parses and reads all of the Resource records in the document.

Instance Attribute Summary collapse

Attributes included from Section

#section_end, #section_start

Instance Method Summary collapse

Methods included from Section

#end_of_section, #end_section, #start_of_section, #start_section

Constructor Details

#initialize(file) ⇒ Resources

Returns a new instance of Resources.



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# File 'lib/psd/resources.rb', line 9

def initialize(file)
  @file = file
  @resources = {}
  @type_index = {}
  @length = nil
end

Instance Attribute Details

#resources ⇒ Object (readonly) Also known as: data

Returns the value of attribute resources.



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# File 'lib/psd/resources.rb', line 6

def resources
  @resources
end

Instance Method Details

#[](id) ⇒ Object 



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# File 'lib/psd/resources.rb', line 50

def [](id)
  if id.is_a?(Symbol)
    by_type(id)
  else
    @resources[id]
  end
end

#by_type(id) ⇒ Object 



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# File 'lib/psd/resources.rb', line 58

def by_type(id)
  @resources[@type_index[id]]
end

#parse ⇒ Object

Parses each Resource and stores them.



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# File 'lib/psd/resources.rb', line 17

def parse
  start_section

  n = length
  start = @file.tell

  while n > 0
    pos = @file.tell

    resource = Resource.new(@file)
    resource.parse

    resource_end = @file.tell + resource.size

    name = Resource::Section.factory(@file, resource)
    @resources[resource.id] = resource
    @type_index[name] = resource.id unless name.nil?

    @file.seek resource_end
    n -= @file.tell - pos
  end

  unless n == 0
    @file.seek start + length
  end

  end_section
end

#skip ⇒ Object 



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# File 'lib/psd/resources.rb', line 46

def skip
  @file.seek length, IO::SEEK_CUR
end