Class: CTioga2::Graphics::Styles::StyleSheet::XPathElement

Inherits:
Object
  • Object
show all
Defined in:
lib/ctioga2/graphics/styles/stylesheet.rb

Overview

An element in a XPath

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#direct_parent ⇒ Object

If this flag is on, the object has to be the direct parent of the child below.



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# File 'lib/ctioga2/graphics/styles/stylesheet.rb', line 44

def direct_parent
  @direct_parent
end

#obj_class ⇒ Object

The class – or nil if not selecting on class



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# File 'lib/ctioga2/graphics/styles/stylesheet.rb', line 37

def obj_class
  @obj_class
end

#obj_id ⇒ Object

The ID, or nil if not selecting on id



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# File 'lib/ctioga2/graphics/styles/stylesheet.rb', line 40

def obj_id
  @obj_id
end

#obj_type ⇒ Object

The type – or nil if not selecting on type



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# File 'lib/ctioga2/graphics/styles/stylesheet.rb', line 34

def obj_type
  @obj_type
end

Class Method Details

.from_text(txt) ⇒ Object 



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# File 'lib/ctioga2/graphics/styles/stylesheet.rb', line 73

def self.from_text(txt)
  a = XPathElement.new
  a.parse_string(txt)
  return a
end

Instance Method Details

#matches?(obj) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ctioga2/graphics/styles/stylesheet.rb', line 79

def matches?(obj)
  if @obj_type && (obj.style_name != @obj_type)
    return false
  end
  if @obj_class && !obj.object_classes.include?(@obj_class)
    return false
  end
  if @obj_id && (obj.object_id != @obj_id)
    return false
  end
  return true
end

#parse_string(txt) ⇒ Object

A XPathElement is a series of elements (w and - allowed), optionnally followed by a > sign. No space allowed, excepted before the > sign



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# File 'lib/ctioga2/graphics/styles/stylesheet.rb', line 49

def parse_string(txt)


  rest = txt.gsub(/([.#]?)([\w-]+)/) do |x|
    if $1 == "."
      @obj_class = $2
    elsif $1 == "#"
      @obj_id = $2
    else
      @obj_type = $2
    end
    ""
  end

  if rest =~ /^\s*\*?\s*(>)?$/
    if $1 == ">"
      @direct_parent = true
    end
  else
    raise "Incorrect XPath element: #{txt}"
  end

end

#to_s ⇒ Object 



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# File 'lib/ctioga2/graphics/styles/stylesheet.rb', line 92

def to_s
  a = @obj_type || ""
  if @obj_id
    a += "##{@obj_id}"
  end
  if @obj_class
    a += ".#{@obj_class}"
  end
  if a.size == 0
    a = "*"
  end
  if @direct_parent
    a += " >"
  end
  return a
  
end