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fast_excel.rb
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fast_excel.rb
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require_relative './fast_excel/binding'
require 'set'
# not used for now
#require_relative '../ext/fast_excel/text_width_ext'
module FastExcel
class Formula
attr_accessor :fml
def initialize(fml)
@fml = fml
end
end
class URL
attr_accessor :url
def initialize(url)
@url = url
end
end
DEF_COL_WIDTH = 8.43
def self.open(filename = nil, constant_memory: false, default_format: nil)
tmp_file = false
if filename
if File.exist?(filename) && File.size(filename) > 0
raise ArgumentError, "File '#{filename}' already exists. FastExcel can not open existing files, only create new files"
end
else
require 'tmpdir'
filename = "#{Dir.mktmpdir}/fast_excel.xlsx"
tmp_file = true
end
filename = filename.to_s if defined?(Pathname) && filename.is_a?(Pathname)
workbook = if constant_memory
opt = Libxlsxwriter::WorkbookOptions.new
opt[:constant_memory] = 1
Libxlsxwriter.workbook_new_opt(filename, opt)
else
Libxlsxwriter.workbook_new(filename)
end
result = Libxlsxwriter::Workbook.new(workbook)
if default_format
raise "default_format argument must be a hash" unless default_format.is_a?(Hash)
result.default_format.set(default_format)
end
result.tmp_file = tmp_file
result.filename = filename
result
end
# Creates internal Libxlsxwriter::Datetime from Datetime object
def self.lxw_datetime(time)
date = Libxlsxwriter::Datetime.new
date[:year] = time.year
date[:month] = time.month
date[:day] = time.day
date[:hour] = time.hour
date[:min] = time.minute
date[:sec] = time.second
date
end
# Creates internal Libxlsxwriter::Datetime from Time object
def self.lxw_time(time)
date = Libxlsxwriter::Datetime.new
date[:year] = time.year
date[:month] = time.month
date[:day] = time.day
date[:hour] = time.hour
date[:min] = time.min
date[:sec] = time.sec
date
end
# seconds in 1 day
XLSX_DATE_DAY = 86400.0
# days between 1970-jan-01 and 1900-jan-01
XLSX_DATE_EPOCH_DIFF = 25569
# Convert time to number of days, and change beginning point from 1st jan 1970 to 1st jan 1900
# Offset argument should be number of seconds, if not specified then it will use Time.zone.utc_offset || 0
#
# https://support.microsoft.com/en-us/help/214330/differences-between-the-1900-and-the-1904-date-system-in-excel
def self.date_num(time, offset = nil)
unless offset
# Try use Rails' app timezone
if Time.respond_to?(:zone)
offset = Time.zone.utc_offset
else
offset = 0 # rollback to UTC
end
end
time.to_f / XLSX_DATE_DAY + XLSX_DATE_EPOCH_DIFF + offset / XLSX_DATE_DAY
end
def self.print_ffi_obj(value)
puts "#{value.class}"
value.members.each do |key|
field_val = if value[key].is_a?(FFI::Pointer) && value[key].null? || value[key].nil?
"nil"
elsif value[key].is_a?(FFI::StructLayout::CharArray)
value[key].to_str.inspect
elsif value[key].is_a?(String)
value[key].inspect
elsif value[key].is_a?(Symbol)
value[key].inspect
else
value[key]
end
puts "* #{key}: #{field_val}"
end
nil
end
COLOR_ENUM = Libxlsxwriter.enum_type(:defined_colors)
EXTRA_COLORS = {
alice_blue: 0xF0F8FF,
antique_white: 0xFAEBD7,
aqua: 0x00FFFF,
aquamarine: 0x7FFFD4,
azure: 0xF0FFFF,
beige: 0xF5F5DC,
bisque: 0xFFE4C4,
black: 0x000000,
blanched_almond: 0xFFEBCD,
blue: 0x0000FF,
blue_violet: 0x8A2BE2,
brown: 0xA52A2A,
burly_wood: 0xDEB887,
cadet_blue: 0x5F9EA0,
chartreuse: 0x7FFF00,
chocolate: 0xD2691E,
coral: 0xFF7F50,
cornflower_blue: 0x6495ED,
cornsilk: 0xFFF8DC,
crimson: 0xDC143C,
cyan: 0x00FFFF,
dark_blue: 0x00008B,
dark_cyan: 0x008B8B,
dark_golden_rod: 0xB8860B,
dark_gray: 0xA9A9A9,
dark_grey: 0xA9A9A9,
dark_green: 0x006400,
dark_khaki: 0xBDB76B,
dark_magenta: 0x8B008B,
dark_olive_green: 0x556B2F,
dark_orange: 0xFF8C00,
dark_orchid: 0x9932CC,
dark_red: 0x8B0000,
dark_salmon: 0xE9967A,
dark_sea_green: 0x8FBC8F,
dark_slate_blue: 0x483D8B,
dark_slate_gray: 0x2F4F4F,
dark_slate_grey: 0x2F4F4F,
dark_turquoise: 0x00CED1,
dark_violet: 0x9400D3,
deep_pink: 0xFF1493,
deep_sky_blue: 0x00BFFF,
dim_gray: 0x696969,
dim_grey: 0x696969,
dodger_blue: 0x1E90FF,
fire_brick: 0xB22222,
floral_white: 0xFFFAF0,
forest_green: 0x228B22,
fuchsia: 0xFF00FF,
gainsboro: 0xDCDCDC,
ghost_white: 0xF8F8FF,
gold: 0xFFD700,
golden_rod: 0xDAA520,
gray: 0x808080,
grey: 0x808080,
green: 0x008000,
green_yellow: 0xADFF2F,
honey_dew: 0xF0FFF0,
hot_pink: 0xFF69B4,
indian_red: 0xCD5C5C,
indigo: 0x4B0082,
ivory: 0xFFFFF0,
khaki: 0xF0E68C,
lavender: 0xE6E6FA,
lavender_blush: 0xFFF0F5,
lawn_green: 0x7CFC00,
lemon_chiffon: 0xFFFACD,
light_blue: 0xADD8E6,
light_coral: 0xF08080,
light_cyan: 0xE0FFFF,
light_golden_rod_yellow: 0xFAFAD2,
light_gray: 0xD3D3D3,
light_grey: 0xD3D3D3,
light_green: 0x90EE90,
light_pink: 0xFFB6C1,
light_salmon: 0xFFA07A,
light_sea_green: 0x20B2AA,
light_sky_blue: 0x87CEFA,
light_slate_gray: 0x778899,
light_slate_grey: 0x778899,
light_steel_blue: 0xB0C4DE,
light_yellow: 0xFFFFE0,
lime: 0x00FF00,
lime_green: 0x32CD32,
linen: 0xFAF0E6,
magenta: 0xFF00FF,
maroon: 0x800000,
medium_aqua_marine: 0x66CDAA,
medium_blue: 0x0000CD,
medium_orchid: 0xBA55D3,
medium_purple: 0x9370DB,
medium_sea_green: 0x3CB371,
medium_slate_blue: 0x7B68EE,
medium_spring_green: 0x00FA9A,
medium_turquoise: 0x48D1CC,
medium_violet_red: 0xC71585,
midnight_blue: 0x191970,
mint_cream: 0xF5FFFA,
misty_rose: 0xFFE4E1,
moccasin: 0xFFE4B5,
navajo_white: 0xFFDEAD,
navy: 0x000080,
old_lace: 0xFDF5E6,
olive: 0x808000,
olive_drab: 0x6B8E23,
orange: 0xFFA500,
orange_red: 0xFF4500,
orchid: 0xDA70D6,
pale_golden_rod: 0xEEE8AA,
pale_green: 0x98FB98,
pale_turquoise: 0xAFEEEE,
pale_violet_red: 0xDB7093,
papaya_whip: 0xFFEFD5,
peach_puff: 0xFFDAB9,
peru: 0xCD853F,
pink: 0xFFC0CB,
plum: 0xDDA0DD,
powder_blue: 0xB0E0E6,
purple: 0x800080,
rebecca_purple: 0x663399,
red: 0xFF0000,
rosy_brown: 0xBC8F8F,
royal_blue: 0x4169E1,
saddle_brown: 0x8B4513,
salmon: 0xFA8072,
sandy_brown: 0xF4A460,
sea_green: 0x2E8B57,
sea_shell: 0xFFF5EE,
sienna: 0xA0522D,
silver: 0xC0C0C0,
sky_blue: 0x87CEEB,
slate_blue: 0x6A5ACD,
slate_gray: 0x708090,
slate_grey: 0x708090,
snow: 0xFFFAFA,
spring_green: 0x00FF7F,
steel_blue: 0x4682B4,
tan: 0xD2B48C,
teal: 0x008080,
thistle: 0xD8BFD8,
tomato: 0xFF6347,
turquoise: 0x40E0D0,
violet: 0xEE82EE,
wheat: 0xF5DEB3,
white: 0xFFFFFF,
white_smoke: 0xF5F5F5,
yellow: 0xFFFF00,
yellow_green: 0x9ACD32
}.freeze
# Convert hex string, color name or hex number to color hex number
def self.color_to_hex(value)
orig_value = value
value = value.to_s if value.is_a?(Symbol)
if value.is_a?(String)
if EXTRA_COLORS[value.to_sym]
return EXTRA_COLORS[value.to_sym]
elsif COLOR_ENUM.find(value.to_sym)
return COLOR_ENUM.find(value.to_sym)
elsif COLOR_ENUM.find("color_#{value.to_sym}")
return COLOR_ENUM.find("color_#{value.to_sym}")
elsif value =~ /^#?(0x)?([\da-f]){6}$/i
value = value.sub('#', '') if value.start_with?('#')
return value.start_with?('0x') ? value.to_i(16) : "0x#{value}".to_i(16)
else
raise ArgumentError, "Unknown color value #{orig_value.inspect}, expected hex string or color name"
end
end
return value if value.is_a?(Numeric)
raise ArgumentError, "Can not use #{value.class} (#{value.inspect}) for color value, expected String or Hex Number"
end
module AttributeHelper
def set(values)
values.each do |key, value|
if respond_to?("#{key}=")
send("#{key}=", value)
elsif respond_to?("set_#{key}=")
send("set_#{key}=", value)
else
self[key] = value
end
end
self
end
def fields_hash
res = {}
members.each do |key|
#p [key, self[key]]
res[key] = respond_to?(key) ? send(key) : self[key]
end
res
end
def pretty_print(pp)
pp fields_hash
end
end
module WorkbookExt
include AttributeHelper
attr_accessor :tmp_file, :is_open, :filename
def initialize(struct)
@is_open = true
@sheet_names = Set.new
@sheets = []
super(struct)
end
def add_format(options = nil)
new_format = super()
new_format.set(options) if options
new_format
end
def bold_cell_format
bold = add_format
bold.set_bold
bold
end
alias_method :bold_format, :bold_cell_format
# "#,##0.00"
# "[$-409]m/d/yy h:mm AM/PM;@"
def number_format(pattern)
format = add_format
format.set_num_format(pattern)
format
end
def add_worksheet(sheetname = nil)
if !sheetname.nil?
if sheetname.length > Libxlsxwriter::SHEETNAME_MAX
raise ArgumentError, "Worksheet name '#{sheetname}' exceeds Excel's limit of #{Libxlsxwriter::SHEETNAME_MAX} characters"
elsif @sheet_names.include?(sheetname)
raise ArgumentError, "Worksheet name '#{sheetname}' is already in use"
end
end
sheet = super(sheetname)
sheet.workbook = self
@sheets << sheet
@sheet_names << sheet[:name]
sheet
end
def get_worksheet_by_name(name)
sheet = super(name)
sheet.workbook = self
sheet
end
def close
@is_open = false
@sheets.each(&:close)
super
end
def read_string
close if @is_open
File.open(filename, 'rb', &:read)
ensure
remove_tmp_folder
end
def remove_tmp_folder
FileUtils.remove_entry(File.dirname(filename)) if tmp_file
end
def constant_memory?
#FastExcel.print_ffi_obj(self[:options])
@constant_memory ||= self[:options][:constant_memory] != 0
end
end
module WorksheetExt
attr_accessor :workbook
include AttributeHelper
def initialize(struct)
@is_open = true
@col_formats = {}
@last_row_number = -1
super(struct)
end
def write_row(row_number, values, formats = nil)
values.each_with_index do |value, index|
format = if formats
formats.is_a?(Array) ? formats[index] : formats
end
write_value(row_number, index, value, format)
end
end
def auto_width?
defined?(@auto_width) && @auto_width
end
def auto_width=(v)
@auto_width = v
@column_widths = {}
end
def calculated_column_widths
@column_widths || {}
end
def write_value(row_number, cell_number, value, format = nil)
if workbook.constant_memory? && row_number < @last_row_number
raise ArgumentError, "Can not write to saved row in constant_memory mode (attempted row: #{row_number}, last saved row: #{last_row_number})"
end
if value.is_a?(Numeric)
write_number(row_number, cell_number, value, format)
elsif defined?(Date) && value.is_a?(Date)
write_datetime(row_number, cell_number, FastExcel.lxw_datetime(value.to_datetime), format)
elsif value.is_a?(Time)
write_number(row_number, cell_number, FastExcel.date_num(value), format)
elsif defined?(DateTime) && value.is_a?(DateTime)
write_number(row_number, cell_number, FastExcel.date_num(value), format)
elsif value.is_a?(TrueClass) || value.is_a?(FalseClass)
write_boolean(row_number, cell_number, value ? 1 : 0, format)
elsif value.is_a?(FastExcel::Formula)
write_formula(row_number, cell_number, value.fml, format)
elsif value.is_a?(FastExcel::URL)
write_url(row_number, cell_number, value.url, format)
add_text_width(value.url, format, cell_number) if auto_width?
else
write_string(row_number, cell_number, value.to_s, format)
add_text_width(value, format, cell_number) if auto_width?
end
@last_row_number = row_number > @last_row_number ? row_number : @last_row_number
end
def add_text_width(value, format, cell_number)
font_size = 0
if format
font_size = format.font_size
end
if font_size == 0
if @col_formats[cell_number] && @col_formats[cell_number].font_size
font_size = @col_formats[cell_number].font_size
end
end
if font_size == 0
font_size = workbook.default_format.font_size
end
font_size = 13 if font_size == nil || font_size == 0
scale = 0.08
new_width = (scale * font_size * value.to_s.length )
@column_widths[cell_number] = if new_width > (@column_widths[cell_number] || 0)
new_width
else
@column_widths[cell_number]
end
end
def append_row(values, formats = nil)
@last_row_number += 1
write_row(last_row_number, values, formats)
end
def <<(values)
append_row(values)
end
def last_row_number
@last_row_number
end
def set_column(start_col, end_col, width = nil, format = nil)
super(start_col, end_col, width || DEF_COL_WIDTH, format)
return unless format
start_col.upto(end_col) do |i|
@col_formats[i] = format
end
end
def set_column_width(col, width)
set_column(col, col, width, @col_formats[col])
end
def set_columns_width(start_col, end_col, width)
start_col.upto(end_col) do |i|
set_column_width(i, width)
end
end
def enable_filters!(start_col: 0, end_col:)
autofilter(start_col, 0, @last_row_number, end_col)
end
def close
if auto_width?
@column_widths.each do |num, width|
set_column_width(num, width + 0.2)
end
end
end
end
module FormatExt
include AttributeHelper
[:font_size, :underline, :font_script, :rotation, :indent, :pattern, :border].each do |prop|
define_method(prop) do
self[prop]
end
define_method("#{prop}=") do |value|
send("set_#{prop}", value)
end
end
[:bold, :italic, :font_outline, :font_shadow, :hidden, :text_wrap, :font_strikeout, :shrink, :text_justlast].each do |prop|
define_method(prop) do
self[prop]
end
define_method("#{prop}=") do |value|
value ? send("set_#{prop}") : self[prop] = false
end
end
[:num_format, :font_name].each do |prop|
define_method(prop) do
self[prop].to_ptr.read_string
end
define_method("#{prop}=") do |value|
send("set_#{prop}", value)
end
end
ALIGN_ENUM = Libxlsxwriter.enum_type(:format_alignments)
# Can be called as:
#
# format.align = :align_center
# format.align = "align_center"
# format.align = :center
# format.align = :align_center
# format.align = {v: "center", h: "center"}
#
# Possible values:
#
# :align_none, :align_left, :align_center, :align_right, :align_fill, :align_justify,
# :align_center_across, :align_distributed, :align_vertical_top, :align_vertical_bottom,
# :align_vertical_center, :align_vertical_justify, :align_vertical_distributed
#
def align=(value)
value = value.to_sym if value.is_a?(String)
if value.is_a?(Symbol)
if ALIGN_ENUM.find(value)
set_align(value)
elsif ALIGN_ENUM.find(prefixed = "align_#{value}".to_sym)
set_align(prefixed)
else
raise ArgumentError, "Can not set align = #{value.inspect}, possible values are: #{ALIGN_ENUM.symbols}"
end
elsif value.is_a?(Hash)
if value[:horizontal]
self.align = "align_#{value[:horizontal].to_s.sub(/^align_/, '')}".to_sym
end
if value[:h]
self.align = "align_#{value[:h].to_s.sub(/^align_/, '')}".to_sym
end
if value[:vertical]
self.align = "align_vertical_#{value[:vertical].to_s.sub(/^align_vertical_/, '')}".to_sym
end
if value[:v]
self.align = "align_vertical_#{value[:v].to_s.sub(/^align_vertical_/, '')}".to_sym
end
possible = [:horizontal, :h, :vertical, :v]
extras = value.keys - possible
if extras.size > 0
raise ArgumentError, "Not allowed keys for align: #{extras.inspect}, possible keys: #{possible.inspect}"
end
else
raise ArgumentError, "value must be a symbol or a hash"
end
end
def align
{
horizontal: ALIGN_ENUM.find(self[:text_h_align]),
vertical: ALIGN_ENUM.find(self[:text_v_align])
}
end
[:font_color, :bg_color, :fg_color, :bottom_color, :diag_color, :left_color, :right_color, :top_color].each do |prop|
define_method("#{prop}=") do |value|
send("set_#{prop}", FastExcel.color_to_hex(value))
end
define_method(prop) do
self[prop]
end
end
[:bottom_color, :left_color, :right_color, :top_color].each do |prop|
alias_method :"border_#{prop}=", :"#{prop}="
alias_method :"border_#{prop}", :"#{prop}"
end
BORDER_ENUM = Libxlsxwriter.enum_type(:format_borders)
[:bottom, :diag_border, :left, :right, :top].each do |prop|
define_method("#{prop}=") do |value|
send("set_#{prop}", border_value(value))
end
define_method(prop) do
BORDER_ENUM.find(self[prop])
end
unless prop == :diag_border
alias_method :"border_#{prop}=", :"#{prop}="
alias_method :"border_#{prop}", :"#{prop}"
end
end
def border_value(value)
# if a number
return value if value.is_a?(Numeric) && BORDER_ENUM.find(value)
orig_value = value
value = value.to_sym if value.is_a?(String)
return BORDER_ENUM.find(value) if BORDER_ENUM.find(value)
return BORDER_ENUM.find(:"border_#{value}") if BORDER_ENUM.find(:"border_#{value}")
short_symbols = BORDER_ENUM.symbols.map {|s| s.to_s.sub(/^border_/, '').to_sym }
raise ArgumentError, "Unknown value #{orig_value.inspect} for border. Possible values: #{short_symbols}"
end
def set_font_size(value)
if value < 0
raise ArgumentError, "font size should be >= 0 (use 0 for user default font size)"
end
super(value)
end
def font_family
font_name
end
def font_family=(value)
self.font_name = value
end
end
end
Libxlsxwriter::Workbook.instance_eval do
include FastExcel::WorkbookExt
end
Libxlsxwriter::Format.instance_eval do
include FastExcel::FormatExt
end
Libxlsxwriter::Worksheet.instance_eval do
include FastExcel::WorksheetExt
end