Class: WebResourceBundler::Filters::ImageEncodeFilter::ImageData

Inherits:
Object
  • Object
show all
Defined in:
lib/web_resource_bundler/filters/image_encode_filter/image_data.rb

Overview

ImageData contains info about image found in css files

Constant Summary collapse

MHTML_CONTENT_LOCATION = 
'Content-Location:'
MHTML_CONTENT_ENCODING = 
'Content-Transfer-Encoding:base64'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(url, folder) ⇒ ImageData

Returns a new instance of ImageData.



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# File 'lib/web_resource_bundler/filters/image_encode_filter/image_data.rb', line 13

def initialize(url, folder)
    @url   = url
	@path  = File.join(folder, url) 
    @exist = File.file?(@path)
    report_problem_if_file_not_found
	if @exist
		@size      = File.size(@path)
		@id        = Digest::MD5.hexdigest(url) 
		@extension = File.basename(@path).split('.').last
	end
end

Instance Attribute Details

#exist ⇒ Object (readonly)

Returns the value of attribute exist.



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# File 'lib/web_resource_bundler/filters/image_encode_filter/image_data.rb', line 11

def exist
  @exist
end

#extension ⇒ Object (readonly)

Returns the value of attribute extension.



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# File 'lib/web_resource_bundler/filters/image_encode_filter/image_data.rb', line 11

def extension
  @extension
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/web_resource_bundler/filters/image_encode_filter/image_data.rb', line 11

def id
  @id
end

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/web_resource_bundler/filters/image_encode_filter/image_data.rb', line 11

def path
  @path
end

#url ⇒ Object (readonly)

Returns the value of attribute url.



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# File 'lib/web_resource_bundler/filters/image_encode_filter/image_data.rb', line 11

def url
  @url
end

Instance Method Details

#construct_mhtml_image_data(separator) ⇒ Object

constructs part of css header with data for current image



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# File 'lib/web_resource_bundler/filters/image_encode_filter/image_data.rb', line 30

def construct_mhtml_image_data(separator)
	if @exist
		result = separator + "\n"
		result << MHTML_CONTENT_LOCATION << @id << "\n"
		result <<	MHTML_CONTENT_ENCODING << "\n\n"
		result << encoded << "\n\n"
	end
end

#encoded ⇒ Object 



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# File 'lib/web_resource_bundler/filters/image_encode_filter/image_data.rb', line 39

def encoded
	return nil unless @exist
	Base64.encode64(File.read(@path)).gsub("\n", '')
end

#size ⇒ Object 



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# File 'lib/web_resource_bundler/filters/image_encode_filter/image_data.rb', line 25

def size
  @size / 1024
end