Module: Win32::CaptureIE::Feature

Included in:
Win32::CaptureIE, BitMap
Defined in:
lib/win32/capture_ie/feature.rb

Overview

:nodoc:

Defined Under Namespace

Classes: DisabledError

Constant Summary collapse

DISABLED_FEATURE = 
[]

Class Method Summary collapse

Class Method Details

.disable_feature(feature) ⇒ Object 



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# File 'lib/win32/capture_ie/feature.rb', line 13

def disable_feature(feature)
  DISABLED_FEATURE << feature if feature_enable?(feature)
  nil
end

.enable_feature(feature) ⇒ Object 



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# File 'lib/win32/capture_ie/feature.rb', line 18

def enable_feature(feature)
  DISABLED_FEATURE.delete(feature)
  nil
end

.feature_available?(feature) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/win32/capture_ie/feature.rb', line 27

def feature_available?(feature)
  begin
    load_depended_library(feature, "test")
    true
  rescue LoadError, DisabledError => ignored
    false
  end
end

.feature_enable?(feature) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/win32/capture_ie/feature.rb', line 23

def feature_enable?(feature)
  not DISABLED_FEATURE.include?(feature)
end

.load_depended_library(feature, function) ⇒ Object 



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# File 'lib/win32/capture_ie/feature.rb', line 48

def load_depended_library(feature, function)
  begin
    load_feature feature, function
  rescue LoadError
    begin
      load_feature "rubygems", function
      load_feature feature, function
    rescue LoadError
      raise LoadError, "no such file to load -- `#{feature}'. " +
        "Please install `#{feature}' to #{function}."
    end
  end
end

.load_feature(feature, function) ⇒ Object 



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# File 'lib/win32/capture_ie/feature.rb', line 43

def load_feature(feature, function)
  raise_if_disabled(feature, function)
  require feature
end

.raise_if_disabled(feature, function) ⇒ Object 



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# File 'lib/win32/capture_ie/feature.rb', line 36

def raise_if_disabled(feature, function)
  if DISABLED_FEATURE.include?(feature)
    raise DisabledError, "`#{feature}' is disabled. " +
      "Please enable `#{feature}' to #{function}."
  end
end