class Aio::Base::Toolkit::Table

Prints text in a tablized format. Pretty lame at the moment, but whatever. 经过修改增加了对中文字体格式的支持 by Elin

Public Class Methods

new(opts = {}) click to toggle source

Initializes a text table instance using the supplied properties. The Table class supports the following hash attributes:

Header

The string to display as a heading above the table.  If none is
specified, no header will be displayed.

HeaderIndent

The amount of space to indent the header.  The default is zero.

Columns

The array of columns that will exist within the table.

Rows

The array of rows that will exist.

Width

The maximum width of the table in characters.

Indent

The number of characters to indent the table.

CellPad

The number of characters to put between each horizontal cell.

Prefix

The text to prefix before the table.

Postfix

The text to affix to the end of the table.

Sortindex

The column to sort the table on, -1 disables sorting.
# File lib/aio/base/toolkit/table.rb, line 59
def initialize(opts = {})
  self.header   = opts['Header']
  self.headeri  = opts['HeaderIndent'] || 0
  self.columns  = opts['Columns'] || []
  # updated below if we got a "Rows" option
  self.rows     = []

  self.width    = opts['Width']   || 80
  self.indent   = opts['Indent']  || 0
  self.cellpad  = opts['CellPad'] || 2
  self.prefix   = opts['Prefix']  || ''
  self.postfix  = opts['Postfix'] || ''
  self.colprops = []
  self.scterm   = /#{opts['SearchTerm']}/mi if opts['SearchTerm']

  self.sort_index  = opts['SortIndex'] || 0
  self.sort_order  = opts['SortOrder'] || :forward

  # Default column properties
  self.columns.length.times { |idx|
    self.colprops[idx] = {}
    self.colprops[idx]['MaxWidth'] = self.columns[idx].length + ch_num(self.columns[idx])
  }

  # ensure all our internal state gets updated with the given rows by
  # using add_row instead of just adding them to self.rows.  See #3825.
  opts['Rows'].each { |row| add_row(row) } if opts['Rows']

  # Merge in options
  if (opts['ColProps'])
    opts['ColProps'].each_key { |col|
      idx = self.columns.index(col)

      if (idx)
        self.colprops[idx].merge!(opts['ColProps'][col])
      end
    }
  end

end
new_from_csv(csv) click to toggle source

Build table from CSV dump

# File lib/aio/base/toolkit/table.rb, line 262
def self.new_from_csv(csv)
  # Read in or keep data, get CSV or die
  if csv.is_a?(String)
    csv = File.file?(csv) ? CSV.read(csv) : CSV.parse(csv)
  end
  # Adjust for skew
  if csv.first == ["Keys", "Values"]
    csv.shift # drop marker
    cols = []
    rows = []
    csv.each do |row|
      cols << row.shift
      rows << row
    end
    tbl = self.new('Columns' => cols)
    rows.in_groups_of(cols.count) {|r| tbl << r.flatten}
  else
    tbl = self.new('Columns' => csv.shift)
    while !csv.empty? do
      tbl << csv.shift
    end
  end
  return tbl
end

Public Instance Methods

<<(fields) click to toggle source

Adds a row using the supplied fields.

# File lib/aio/base/toolkit/table.rb, line 163
def <<(fields)
  add_row(fields)
end
[](*col_names) click to toggle source
# File lib/aio/base/toolkit/table.rb, line 287
def [](*col_names)
  tbl = self.class.new('Indent' => self.indent,
                       'Header' => self.header,
                       'Columns' => col_names)
  indexes = []

  col_names.each do |col_name|
    index = self.columns.index(col_name)
    raise RuntimeError, "Invalid column name #{col_name}" if index.nil?
    indexes << index
  end

  self.rows.each do |old_row|
    new_row = []
    indexes.map {|i| new_row << old_row[i]}
    tbl << new_row
  end

  return tbl
end
add_hr() click to toggle source

Adds a horizontal line.

# File lib/aio/base/toolkit/table.rb, line 226
def add_hr
  rows << '__hr__'
end
add_row(fields = []) click to toggle source

Adds a row with the supplied fields.

# File lib/aio/base/toolkit/table.rb, line 170
def add_row(fields = [])
  if fields.length != self.columns.length
    raise RuntimeError, 'Invalid number of columns!'
  end
  fields.each_with_index { |field, idx|
    # Remove whitespace and ensure String format
    field = field.to_s.strip
                      field_length = field.to_s.length + ch_num(field.to_s)
    if (colprops[idx]['MaxWidth'] < field_length)
      old = colprops[idx]['MaxWidth']
      colprops[idx]['MaxWidth'] = field_length
    end
  }

  rows << fields
end
drop_left() click to toggle source

Returns new sub-table with headers and rows maching column names submitted

Flips table 90 degrees left

# File lib/aio/base/toolkit/table.rb, line 236
def drop_left
  tbl = self.class.new(
    'Columns' => Array.new(self.rows.count+1,'  '),
    'Header' => self.header,
    'Indent' => self.indent)
  (self.columns.count+1).times do |ti|
    row = self.rows.map {|r| r[ti]}.unshift(self.columns[ti]).flatten
    # insert our col|row break. kind of hackish
    row[1] = "| #{row[1]}" unless row.all? {|e| e.nil? || e.empty?}
    tbl << row
  end
  return tbl
end
ip_cmp(a, b) click to toggle source
# File lib/aio/base/toolkit/table.rb, line 187
def ip_cmp(a, b)
  begin
    a = ::IPAddr.new(a.to_s)
    b = ::IPAddr.new(b.to_s)
    return 1  if a.ipv6? && b.ipv4?
    return -1 if a.ipv4? && b.ipv6?
    a <=> b
  rescue ::IPAddr::Error
    nil
  end
end
p()
Alias for: print
print() click to toggle source

Prints the contents of the table.

Also aliased as: p
sort_rows(index = sort_index, order = sort_order) click to toggle source

Sorts the rows based on the supplied index of sub-arrays If the supplied index is an IPv4 address, handle it differently, but avoid actually resolving domain names.

# File lib/aio/base/toolkit/table.rb, line 204
def sort_rows(index = sort_index, order = sort_order)
  return if index == -1
  return unless rows
  rows.sort! do |a,b|
    if a[index].nil?
      cmp = -1
    elsif b[index].nil?
      cmp = 1
    elsif a[index] =~ /^[0-9]+$/ and b[index] =~ /^[0-9]+$/
      cmp = a[index].to_i <=> b[index].to_i
    elsif (cmp = ip_cmp(a[index], b[index])) != nil
    else
      cmp = a[index] <=> b[index] # assumes otherwise comparable.
    end
    cmp ||= 0
    order == :forward ? cmp : -cmp
  end
end
to_csv() click to toggle source

Converts table contents to a csv

# File lib/aio/base/toolkit/table.rb, line 126
def to_csv
  str = ''
  str << ( columns.join(",") + "\n" )
  rows.each { |row|
    next if is_hr(row) || !row_visible(row)
    str << ( row.map{|x|
      x = x.to_s
      x.gsub(/[\r\n]/, ' ').gsub(/\s+/, ' ').gsub('"', '""')
    }.map{|x| "\"#{x}\"" }.join(",") + "\n" )
  }
  str
end
to_s() click to toggle source

Converts table contents to a string.

# File lib/aio/base/toolkit/table.rb, line 103
def to_s
  str  = prefix.dup
  str << header_to_s || ''
  str << columns_to_s || ''
  str << hr_to_s || ''

  sort_rows
  rows.each { |row|
    if (is_hr(row))
      str << hr_to_s
    else
      str << row_to_s(row) if row_visible(row)
    end
  }

  str << postfix

  return str
end
valid_ip?(value) click to toggle source
# File lib/aio/base/toolkit/table.rb, line 250
def valid_ip?(value)
  begin
    ::IPAddr.new value
    true
  rescue ::IPAddr::Error
    false
  end
end

Protected Instance Methods

ch_num(str) click to toggle source
# File lib/aio/base/toolkit/table.rb, line 431
def ch_num(str)
        s = str.dup
        s.size-s.gsub(/[\u4e00-\u9fa5]/,'').size
end
row_visible(row) click to toggle source

Returns if a row should be visible or not

# File lib/aio/base/toolkit/table.rb, line 322
def row_visible(row)
  return true if self.scterm.nil?
  row_to_s(row).match(self.scterm)
end