Module: Rspreadsheet::Tools

Defined in:
lib/rspreadsheet/tools.rb

Overview

this module contains methods used bz several objects

Class Method Summary collapse

Class Method Details

.a2c(*x) ⇒ Object 



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# File 'lib/rspreadsheet/tools.rb', line 80

def self.a2c(*x); convert_cell_address_to_coordinates(*x) end

.c2a(*x) ⇒ Object 



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# File 'lib/rspreadsheet/tools.rb', line 79

def self.c2a(*x); convert_cell_coordinates_to_address(*x) end

.convert_cell_address_to_coordinates(*addr) ⇒ Object

converts cell adress like 'F12' to pair od integers [row,col]



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# File 'lib/rspreadsheet/tools.rb', line 12

def self.convert_cell_address_to_coordinates(*addr)
  if addr.length == 1
    addr[0].match(/^([A-Za-z]{1,3})(\d{1,8})$/)
    colname = $~[1]
    rowname = $~[2].to_i
  elsif addr.length == 2
    a = addr[0]; b = addr[1]
    if a.kind_of?(Integer) and b.kind_of?(Integer) # most common case first
      colname,rowname = b,a 
    elsif only_letters?(a)
      if kind_of_integer?(b)
        colname,rowname = a,b.to_i
      else
        raise 'Wrong parameters - first is letters, but the seconds is not digits only'
      end
    elsif kind_of_integer?(a)
      if only_letters?(b)
        colname,rowname = b,a.to_i
      elsif kind_of_integer?(b)
        colname,rowname = b.to_i,a.to_i
      else
        raise 'Wrong second out of two paremeters - mix of digits and numbers'
      end
    else 
      raise 'Wrong first out of two paremeters - mix of digits and numbers'
    end
  else
    raise 'Wrong number of arguments'
  end
   
  ## first possibility how to implement it
  # colname=colname.rjust(3,'@')
  # col = (colname[-1].ord-64)+(colname[-2].ord-64)*26+(colname[-3].ord-64)*26*26

  ## second possibility how to implement it
  # col=(colname.to_i(36)-('A'*colname.size).to_i(36)).to_s(36).to_i(26)+('1'*colname.size).to_i(26)
  
  if colname.kind_of?(Integer)
    col=colname
  else
  ## third possibility how to implement it (second one little shortened)
    s=colname.size
    col=(colname.upcase.to_i(36)-(36**s-1).div(3.5)).to_s(36).to_i(26)+(26**s-1)/25
  end
  
  row = rowname
  return [row,col]
end

.convert_cell_coordinates_to_address(*coords) ⇒ Object 



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# File 'lib/rspreadsheet/tools.rb', line 60

def self.convert_cell_coordinates_to_address(*coords)
  coords = coords[0] if coords.length == 1
  raise 'Wrong number of arguments' if coords.length != 2
  row = coords[0].to_i # security against string arguments
  col = coords[1].to_i
  colstring = ''
  if col > 702
    pom = (col-703).div(26*26)+1
    colstring += (pom+64).chr
    col -= pom*26*26
  end
  if col > 26
    pom = (col-27).div(26)+1
    colstring += (pom+64).chr
    col -= pom*26
  end
  colstring += (col+64).chr
  return colstring+row.to_s
end

.get_namespace(prefix) ⇒ LibXML::XML::Namespace

Finds LibXML::XML::Namespace object by its prefix. It knows all OpenDocument commonly used namespaces.

Parameters:

  • prefix (String) —

    namespace prefix

Returns:

  • (LibXML::XML::Namespace) —

    namespace object



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# File 'lib/rspreadsheet/tools.rb', line 84

def self.get_namespace(prefix)
  ns_array = {
    'office'=>"urn:oasis:names:tc:opendocument:xmlns:office:1.0",
    'style'=>"urn:oasis:names:tc:opendocument:xmlns:style:1.0",
    'text'=>"urn:oasis:names:tc:opendocument:xmlns:text:1.0",
    'table'=>"urn:oasis:names:tc:opendocument:xmlns:table:1.0",
    'draw'=>"urn:oasis:names:tc:opendocument:xmlns:drawing:1.0",
    'fo'=>"urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0",
    'xlink'=>"http://www.w3.org/1999/xlink",
    'dc'=>"http://purl.org/dc/elements/1.1/",
    'meta'=>"urn:oasis:names:tc:opendocument:xmlns:meta:1.0",
    'number'=>"urn:oasis:names:tc:opendocument:xmlns:datastyle:1.0",
    'presentation'=>"urn:oasis:names:tc:opendocument:xmlns:presentation:1.0",
    'svg'=>"urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0",
    'chart'=>"urn:oasis:names:tc:opendocument:xmlns:chart:1.0",
    'dr3d'=>"urn:oasis:names:tc:opendocument:xmlns:dr3d:1.0",
    'math'=>"http://www.w3.org/1998/Math/MathML",
    'form'=>"urn:oasis:names:tc:opendocument:xmlns:form:1.0",
    'script'=>"urn:oasis:names:tc:opendocument:xmlns:script:1.0",
    'ooo'=>"http://openoffice.org/2004/office",
    'ooow'=>"http://openoffice.org/2004/writer",
    'oooc'=>"http://openoffice.org/2004/calc",
    'dom'=>"http://www.w3.org/2001/xml-events",
    'xforms'=>"http://www.w3.org/2002/xforms",
    'xsd'=>"http://www.w3.org/2001/XMLSchema",
    'xsi'=>"http://www.w3.org/2001/XMLSchema-instance",
    'rpt'=>"http://openoffice.org/2005/report",
    'of'=>"urn:oasis:names:tc:opendocument:xmlns:of:1.2",
    'xhtml'=>"http://www.w3.org/1999/xhtml",
    'grddl'=>"http://www.w3.org/2003/g/data-view#",
    'tableooo'=>"http://openoffice.org/2009/table",
    'drawooo'=>"http://openoffice.org/2010/draw",
    'calcext'=>"urn:org:documentfoundation:names:experimental:calc:xmlns:calcext:1.0",
    'loext'=>"urn:org:documentfoundation:names:experimental:office:xmlns:loext:1.0",
    'field'=>"urn:openoffice:names:experimental:ooo-ms-interop:xmlns:field:1.0",
    'formx'=>"urn:openoffice:names:experimental:ooxml-odf-interop:xmlns:form:1.0",
    'css3t'=>"http://www.w3.org/TR/css3-text/"
  }
  if @pomnode.nil?
    @pomnode = LibXML::XML::Node.new('xxx')
  end
  if @ns.nil? then @ns={} end
  if @ns[prefix].nil?
    @ns[prefix] = LibXML::XML::Namespace.new(@pomnode, prefix, ns_array[prefix])
  end
  return @ns[prefix]
end

.get_ns_attribute(node, ns_prefix, key, default = :undefined_default) ⇒ Object 



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# File 'lib/rspreadsheet/tools.rb', line 148

def self.get_ns_attribute(node,ns_prefix,key,default=:undefined_default)
  if default==:undefined_default
    node.attributes.get_attribute_ns(Tools.get_namespace(ns_prefix).href,key)
  else
    node.nil? ? default : node.attributes.get_attribute_ns(Tools.get_namespace(ns_prefix).href,key) || default
  end
end

.get_ns_attribute_value(node, ns_prefix, key) ⇒ Object 



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# File 'lib/rspreadsheet/tools.rb', line 155

def self.get_ns_attribute_value(node,ns_prefix,key)
  Tools.get_ns_attribute(node,ns_prefix,key).andand.value
end

.kind_of_integer?(x) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rspreadsheet/tools.rb', line 6

def self.kind_of_integer?(x)
  (x.kind_of?(Numeric) and x.to_i==x) or 
  (x.kind_of?(String) and x.match(/^\d*(\.0*)?$/) != nil)
end

.only_letters?(x) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rspreadsheet/tools.rb', line 5

def self.only_letters?(x); x.kind_of?(String) and x.match(/^[A-Za-z]*$/) != nil end

.prepare_ns_node(ns_prefix, nodename, value = nil) ⇒ Object 



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# File 'lib/rspreadsheet/tools.rb', line 162

def self.prepare_ns_node(ns_prefix,nodename,value=nil)
  LibXML::XML::Node.new(nodename,value, Tools.get_namespace(ns_prefix))
end

.remove_ns_attribute(node, ns_prefix, key) ⇒ Object 



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# File 'lib/rspreadsheet/tools.rb', line 158

def self.remove_ns_attribute(node,ns_prefix,key)
  node.attributes.get_attribute_ns(Tools.get_namespace(ns_prefix).href,key)
  attr.remove! unless attr.nil? 
end

.set_ns_attribute(node, ns_prefix, key, value, delete_value = nil) ⇒ Object

sets namespaced attribute "ns_prefix:key" in node to value. if value == delete_value then remove the attribute



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# File 'lib/rspreadsheet/tools.rb', line 132

def self.set_ns_attribute(node,ns_prefix,key,value,delete_value=nil)
  ns = Tools.get_namespace(ns_prefix)
  attr = node.attributes.get_attribute_ns(ns.href, key)
  
  unless value==delete_value # set attribute
    if attr.nil? # create attribute if needed
      attr = LibXML::XML::Attr.new(node, key,'temporarilyempty')
      attr.namespaces.namespace = ns
    end
    attr.value = value.to_s
    attr
  else # remove attribute
    attr.remove! unless attr.nil? 
    nil
  end
end