Class: Guilded::BrowserDetector

Inherits:
Object
  • Object
show all
Defined in:
lib/guilded/browser_detector.rb

Overview

The BrowserDetector provides the ability to determine browser information from the user agent string.

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(request) ⇒ BrowserDetector

Returns a new instance of BrowserDetector.



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# File 'lib/guilded/browser_detector.rb', line 8

def initialize( request )
  @request = request
end

Class Method Details

.all_browsers ⇒ Object 



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# File 'lib/guilded/browser_detector.rb', line 131

def self.all_browsers
  %W( ie8, ie7, ie6, opera, firefox, netscape, konqueror, safari )
end

.all_mobile_browsers ⇒ Object 



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# File 'lib/guilded/browser_detector.rb', line 135

def self.all_mobile_browsers
  %w( ie_ce4 )
end

Instance Method Details

#browser_full_name ⇒ Object

Returns the browser name concatenated with the browser version. for example, ‘ie7’.

Request

  • request - The request object.



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# File 'lib/guilded/browser_detector.rb', line 82

def browser_full_name
  browser_name + browser_version
end

#browser_is?(options = {}) ⇒ Boolean

Returns true if the browser matches the options ent in, otherwise returns false.

Request

  • request - The request object.

Options

  • :name - The name of the browser. For example ‘ie’.

  • :version - The version of the browser. For example ‘7’.

Returns:

  • (Boolean) 


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# File 'lib/guilded/browser_detector.rb', line 21

def browser_is?( options={} )
  name = options[:name].to_s.strip
  version = options[:version].to_s.strip

  return true if browser_name == name
  return true if name == 'mozilla' && browser_name == 'gecko'
  #return true if name == 'ie' && browser_name.index( 'ie' )
  return true if name == 'webkit' && browser_name == 'safari'
end

#browser_name ⇒ Object

Returns the name of the browser that is making this request. For example ‘ie’.

Request

  • request - The request object.



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# File 'lib/guilded/browser_detector.rb', line 36

def browser_name
  begin
    @browser_name ||= begin
      ua = @request.env['HTTP_USER_AGENT']
      if ua.nil?
        'unknown'
      else
        ua = ua.downcase  

        if ua.index( 'msie' ) && !ua.index( 'opera' ) && !ua.index( 'webtv' )
          if ua.index( 'windows ce' )
            'ie' + '_ce' #+ ua[ua.index( 'msie' ) + 5].chr 
          else
            'ie' # + ua[ua.index( 'msie' ) + 5].chr
          end
        elsif ua.include?( 'chrome' )
          'chrome'
        elsif ua.include?( 'netscape' )
          'netscape'
        elsif ua.include?( 'gecko/' ) 
          'firefox'
        elsif ua.include?( 'opera' )
          'opera'
        elsif ua.include?( 'konqueror' ) 
          'konqueror'
        elsif ua.include?( 'applewebkit/' )
          'safari'
        elsif ua.include?( 'mozilla/' )
          'firefox'
        elsif ua.include?( 'firefox' )
          'firefox'
        else
          'unknown'
        end
      end
    end
  rescue
    'unknown'
  end
end

#browser_version ⇒ Object

Returns the version of the browser that is making this request. For example ‘7’.

Request

  • request - The request object.



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# File 'lib/guilded/browser_detector.rb', line 91

def browser_version
  begin
    @browser_version ||= begin
      ua = @request.env['HTTP_USER_AGENT'].downcase

      if browser_name == 'opera'
        ua[ua.index( 'opera' ) + 6].chr
      elsif browser_name == 'chrome'
        ua[ua.index( 'chrome' ) + 7].chr
      elsif browser_name == 'firefox'
        ua[ua.index( 'firefox' ) + 8].chr
      elsif browser_name == 'netscape'
        ua[ua.index( 'netscape' ) + 9].chr
      elsif browser_name.index( 'ie' )
        ua[ua.index( 'msie' ) + 5].chr
      elsif browser_name.index( 'safari' )
        ua[ua.index( 'version' ) + 8].chr
      else
        '0'
      end
    end
  rescue
    '0'
  end
end

#can_use_png? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/guilded/browser_detector.rb', line 117

def can_use_png?
   if browser_name.index( 'ie' ) == 0
	  if browser_version.to_i < 7 
			false
		else
			true
		end
	#elsif browser_name == 'firefox'
	  #	false
	else
		true
	end
end