Class: Excel

Inherits:
GenericSpreadsheet show all
Defined in:
lib/roo/excel.rb

Overview

Class for handling Excel-Spreadsheets

Constant Summary collapse

EXCEL_NO_FORMULAS = 
'formulas are not supported for excel spreadsheets'

Instance Attribute Summary

Attributes inherited from GenericSpreadsheet

#default_sheet, #header_line

Instance Method Summary collapse

Methods inherited from GenericSpreadsheet

#column, #empty?, #find, #first_column, #first_column_as_letter, #first_row, #info, #last_column, #last_column_as_letter, #last_row, #reload, #remove_tmp, #row, #to_csv, #to_xml, #to_yaml

Constructor Details

#initialize(filename, packed = nil, file_warning = :error) ⇒ Excel

Creates a new Excel spreadsheet object. Parameter packed: :zip - File is a zip-file



60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
 
# File 'lib/roo/excel.rb', line 60

def initialize(filename, packed = nil, file_warning = :error)
  super()
  @file_warning = file_warning
  @tmpdir = "oo_"+$$.to_s
  @tmpdir = File.join(ENV['ROO_TMP'], @tmpdir) if ENV['ROO_TMP'] 
  unless File.exists?(@tmpdir)
    FileUtils::mkdir(@tmpdir)
  end
  filename = open_from_uri(filename) if filename[0,7] == "http://"
  filename = open_from_stream(filename[7..-1]) if filename[0,7] == "stream:"
  filename = unzip(filename) if packed and packed == :zip
  begin
    file_type_check(filename,'.xls','an Excel')
    @filename = filename
    unless File.file?(@filename)
      raise IOError, "file #{@filename} does not exist"
    end
    @workbook = Spreadsheet.open(filename)
    @default_sheet = self.sheets.first
  ensure
    #if ENV["roo_local"] != "thomas-p"
    FileUtils::rm_r(@tmpdir)
    #end
  end
  @cell = Hash.new
  @cell_type = Hash.new
  @formula = Hash.new
  @first_row = Hash.new
  @last_row = Hash.new
  @first_column = Hash.new
  @last_column = Hash.new
  @header_line = 1
  @cells_read = Hash.new
  @fonts = Hash.new
end

Instance Method Details

#cell(row, col, sheet = nil) ⇒ Object

returns the content of a cell. The upper left corner is (1,1) or (‘A’,1)

Raises:

  • (ArgumentError) 


106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
 
# File 'lib/roo/excel.rb', line 106

def cell(row,col,sheet=nil)
  sheet = @default_sheet unless sheet
  raise ArgumentError unless sheet
  read_cells(sheet) unless @cells_read[sheet]
  raise "should be read" unless @cells_read[sheet]
  row,col = normalize(row,col)
  if celltype(row,col,sheet) == :date
    yyyy,mm,dd = @cell[sheet][[row,col]].split('-')
    return Date.new(yyyy.to_i,mm.to_i,dd.to_i)
  end
  if celltype(row,col,sheet) == :string
    return platform_specific_iconv(@cell[sheet][[row,col]])
  else
    return @cell[sheet][[row,col]]
  end
end

#celltype(row, col, sheet = nil) ⇒ Object

returns the type of a cell:

  • :float

  • :string,

  • :date

  • :percentage

  • :formula

  • :time

  • :datetime



131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
 
# File 'lib/roo/excel.rb', line 131

def celltype(row,col,sheet=nil)
  sheet = @default_sheet unless sheet
  read_cells(sheet) unless @cells_read[sheet]
  row,col = normalize(row,col)
  begin
    if @formula[sheet][[row,col]]
      return :formula
    else
      @cell_type[sheet][[row,col]]
    end
  rescue
    puts "Error in sheet #{sheet}, row #{row}, col #{col}"
    raise
  end
end

#font(row, col, sheet = nil) ⇒ Object

Given a cell, return the cell’s font



163
164
165
166
167
168
 
# File 'lib/roo/excel.rb', line 163

def font(row, col, sheet=nil)
  sheet = @default_sheet unless sheet
  read_cells(sheet) unless @cells_read[sheet]
  row,col = normalize(row,col)
  @fonts[sheet][[row,col]]
end

#formula(row, col, sheet = nil) ⇒ Object

returns NO formula in excel spreadsheets

Raises:



148
149
150
 
# File 'lib/roo/excel.rb', line 148

def formula(row,col,sheet=nil)
  raise EXCEL_NO_FORMULAS
end

#formula?(row, col, sheet = nil) ⇒ Boolean

raises an exception because formulas are not supported for excel files

Returns:

  • (Boolean)

Raises:



153
154
155
 
# File 'lib/roo/excel.rb', line 153

def formula?(row,col,sheet=nil)
  raise EXCEL_NO_FORMULAS
end

#formulas(sheet = nil) ⇒ Object

returns NO formulas in excel spreadsheets

Raises:



158
159
160
 
# File 'lib/roo/excel.rb', line 158

def formulas(sheet=nil)
  raise EXCEL_NO_FORMULAS
end

#sheets ⇒ Object

returns an array of sheet names in the spreadsheet



97
98
99
100
101
102
103
 
# File 'lib/roo/excel.rb', line 97

def sheets
  result = []
  @workbook.worksheets.each do |worksheet| 
    result << normalize_string(worksheet.name)
  end
  return result
end

#to_s(sheet = nil) ⇒ Object

shows the internal representation of all cells mainly for debugging purposes



172
173
174
175
176
 
# File 'lib/roo/excel.rb', line 172

def to_s(sheet=nil)
  sheet = @default_sheet unless sheet
  read_cells(sheet) unless @cells_read[sheet]
  @cell[sheet].inspect
end