calibre/resources/default_tweaks.py

#!/usr/bin/env python
# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
# License: GPLv3 Copyright: 2010, Kovid Goyal <kovid at kovidgoyal.net>


# Contains various tweaks that affect calibre behavior. Only edit this file if
# you know what you are doing. If you delete this file, it will be recreated from
# defaults.

#: Auto increment series index
# The algorithm used to assign a book added to an existing series a series number.
# New series numbers assigned using this tweak are always integer values, except
# if a constant non-integer is specified.
# Possible values are:
#   next - First available integer larger than the largest existing number
#   first_free - First available integer larger than 0
#   next_free - First available integer larger than the smallest existing number
#   last_free - First available integer smaller than the largest existing number. Return largest existing + 1 if no free number is found
#   const - Assign the number 1 always
#   no_change - Do not change the series index
#   a number - Assign that number always. The number is not in quotes. Note that 0.0 can be used here.
# Examples:
#   series_index_auto_increment = 'next'
#   series_index_auto_increment = 'next_free'
#   series_index_auto_increment = 16.5
#
# Set the use_series_auto_increment_tweak_when_importing tweak to True to
# use the above values when importing/adding books. If this tweak is set to
# False (the default) then the series number will be set to 1 if it is not
# explicitly set during the import. If set to True, then the
# series index will be set according to the series_index_auto_increment setting.
# Note that the use_series_auto_increment_tweak_when_importing tweak is used
# only when a value is not provided during import. If the importing regular
# expression produces a value for series_index, or if you are reading metadata
# from books and the import plugin produces a value, then that value will
# be used irrespective of the setting of the tweak.
series_index_auto_increment = 'next'
use_series_auto_increment_tweak_when_importing = False

#: Add separator after completing an author name
# Set this if the completion separator should be appended to the end of the
# completed text to automatically begin a new completion operation for authors.
# It can be either True or False
authors_completer_append_separator = False

#: Author sort name algorithm
# The algorithm used to copy author to author_sort.
# Possible values are:
#  invert: use "fn ln" -> "ln, fn"
#  copy  : copy author to author_sort without modification
#  comma : use 'copy' if there is a ',' in the name, otherwise use 'invert'
#  nocomma : "fn ln" -> "ln fn" (without the comma)
# When this tweak is changed, the author_sort values stored with each author
# must be recomputed by right-clicking on an author in the left-hand tags
# panel, selecting 'Manage authors', and pressing
# 'Recalculate all author sort values'.
#
# The author_name_suffixes are words that are ignored when they occur at the
# end of an author name. The case of the suffix is ignored and trailing
# periods are automatically handled.
#
# The same is true for author_name_prefixes.
#
# The author_name_copywords are a set of words which, if they occur in an
# author name, cause the automatically generated author sort string to be
# identical to the author's name. This means that the sort for a string like
# "Acme Inc." will be "Acme Inc." instead of "Inc., Acme".
#
# If author_use_surname_prefixes is enabled, any of the words in
# author_surname_prefixes will be treated as a prefix to the surname, if they
# occur before the surname. So for example, "John von Neumann" would be sorted
# as "von Neumann, John" and not "Neumann, John von".
author_sort_copy_method = 'comma'
author_name_suffixes = ('Jr', 'Sr', 'Inc', 'Ph.D', 'Phd',
                        'MD', 'M.D', 'I', 'II', 'III', 'IV',
                        'Junior', 'Senior')
author_name_prefixes = ('Mr', 'Mrs', 'Ms', 'Dr', 'Prof')
author_name_copywords = (
    'Agency', 'Corporation', 'Company', 'Co.', 'Council',
    'Committee', 'Inc.', 'Institute', 'National', 'Society', 'Club', 'Team',
    'Software', 'Games', 'Entertainment', 'Media', 'Studios',
)
author_use_surname_prefixes = False
author_surname_prefixes = ('da', 'de', 'di', 'la', 'le', 'van', 'von')

#: Splitting multiple author names
# By default, calibre splits a string containing multiple author names on
# ampersands and the words "and" and "with". You can customize the splitting
# by changing the regular expression below. Strings are split on whatever the
# specified regular expression matches, in addition to ampersands.
# Default: r'(?i),?\s+(and|with)\s+'
authors_split_regex = r'(?i),?\s+(and|with)\s+'

#: Use author sort in Tag browser
# Set which author field to display in the Tag browser (the list of authors,
# series, publishers etc on the left hand side). The choices are author and
# author_sort. This tweak affects only what is displayed under the authors
# category in the Tag browser and Content server. Please note that if you set this
# to author_sort, it is very possible to see duplicate names in the list because
# although it is guaranteed that author names are unique, there is no such
# guarantee for author_sort values. Showing duplicates won't break anything, but
# it could lead to some confusion. When using 'author_sort', the tooltip will
# show the author's name.
# Examples:
#   categories_use_field_for_author_name = 'author'
#   categories_use_field_for_author_name = 'author_sort'
categories_use_field_for_author_name = 'author'

#: Control partitioning of Tag browser
# When partitioning the Tag browser, the format of the subcategory label is
# controlled by a template: categories_collapsed_name_template if sorting by
# name, categories_collapsed_rating_template if sorting by average rating, and
# categories_collapsed_popularity_template if sorting by popularity. There are
# two variables available to the template: first and last. The variable 'first'
# is the initial item in the subcategory, and the variable 'last' is the final
# item in the subcategory. Both variables are 'objects'; they each have multiple
# values that are obtained by using a suffix. For example, first.name for an
# author category will be the name of the author. The sub-values available are:
#  name: the printable name of the item
#  count: the number of books that references this item
#  avg_rating: the average rating of all the books referencing this item
#  sort: the sort value. For authors, this is the author_sort for that author
#  category: the category (e.g., authors, series) that the item is in.
# Note that the "r'" in front of the { is necessary if there are backslashes
# (\ characters) in the template. It doesn't hurt anything to leave it there
# even if there aren't any backslashes.
categories_collapsed_name_template = r'{first.sort:shorten(4,,0)} - {last.sort:shorten(4,,0)}'
categories_collapsed_rating_template = r'{first.avg_rating:4.2f:ifempty(0)} - {last.avg_rating:4.2f:ifempty(0)}'
categories_collapsed_popularity_template = r'{first.count:d} - {last.count:d}'

#: Specify columns to sort the booklist by on startup
# Provide a set of columns to be sorted on when calibre starts.
# The argument is None if saved sort history is to be used
# otherwise it is a list of column,order pairs. Column is the
# lookup/search name, found using the tooltip for the column
# Order is 0 for ascending, 1 for descending.
# For example, set it to [('authors',0),('title',0)] to sort by
# title within authors.
sort_columns_at_startup = None

#: Control how dates are displayed
# Format to be used for publication date and the timestamp (date).
#  A string controlling how the publication date is displayed in the GUI
#  d     the day as number without a leading zero (1 to 31)
#  dd    the day as number with a leading zero (01 to 31)
#  ddd   the abbreviated localized day name (e.g. 'Mon' to 'Sun')
#  dddd  the long localized day name (e.g. 'Monday' to 'Sunday')
#  M     the month as number without a leading zero (1-12)
#  MM    the month as number with a leading zero (01-12)
#  MMM   the abbreviated localized month name (e.g. 'Jan' to 'Dec')
#  MMMM  the long localized month name (e.g. 'January' to 'December')
#  yy    the year as two digit number (00-99)
#  yyyy  the year as four digit number
#  h     the hours without a leading 0 (0 to 11 or 0 to 23, depending on am/pm)
#  hh    the hours with a leading 0 (00 to 11 or 00 to 23, depending on am/pm)
#  m     the minutes without a leading 0 (0 to 59)
#  mm    the minutes with a leading 0 (00 to 59)
#  s     the seconds without a leading 0 (0 to 59)
#  ss    the seconds with a leading 0 (00 to 59)
#  ap    use a 12-hour clock instead of a 24-hour clock, with "ap" replaced by the lowercase localized string for am or pm
#  AP    use a 12-hour clock instead of a 24-hour clock, with "AP" replaced by the uppercase localized string for AM or PM
#  aP    use a 12-hour clock instead of a 24-hour clock, with "aP" replaced by the localized string for am or pm
#  Ap    use a 12-hour clock instead of a 24-hour clock, with "Ap" replaced by the localized string for AM or PM
#  iso   the date with time and timezone. Must be the only format present
#  For example, given the date of 9 Jan 2010, the following formats show
#  MMM yyyy ==> Jan 2010    yyyy ==> 2010       dd MMM yyyy ==> 09 Jan 2010
#  MM/yyyy ==> 01/2010      d/M/yy ==> 9/1/10   yy ==> 10
#
# publication default if not set: MMM yyyy
# timestamp default if not set: dd MMM yyyy
# last_modified_display_format if not set: dd MMM yyyy
gui_pubdate_display_format = 'MMM yyyy'
gui_timestamp_display_format = 'dd MMM yyyy'
gui_last_modified_display_format = 'dd MMM yyyy'

#: Control sorting of titles and series in the library display
# Control title and series sorting in the library view. If set to
# 'library_order', the title sort field will be used instead of the title.
# Unless you have manually edited the title sort field, leading articles such as
# The and A will be ignored. If set to 'strictly_alphabetic', the titles will be
# sorted as-is (sort by title instead of title sort). For example, with
# library_order, The Client will sort under 'C'. With strictly_alphabetic, the
# book will sort under 'T'.
# This flag affects calibre's library display. It has no effect on devices. In
# addition, titles for books added before changing the flag will retain their
# order until the title is edited. Editing a title and hitting Enter
# without changing anything is sufficient to change the sort. Or you can use
# the 'Update title sort' action in the Bulk metadata edit dialog to update
# it for many books at once.
title_series_sorting = 'library_order'

#: Control formatting of title and series when used in templates
# Control how title and series names are formatted when saving to disk/sending
# to device. The behavior depends on the field being processed. If processing
# title, then if this tweak is set to 'library_order', the title will be
# replaced with title_sort. If it is set to 'strictly_alphabetic', then the
# title will not be changed. If processing series, then if set to
# 'library_order', articles such as 'The' and 'An' will be moved to the end. If
# set to 'strictly_alphabetic', the series will be sent without change.
# For example, if the tweak is set to library_order, "The Lord of the Rings"
# will become "Lord of the Rings, The". If the tweak is set to
# strictly_alphabetic, it would remain "The Lord of the Rings". Note that the
# formatter function raw_field will return the base value for title and
# series regardless of the setting of this tweak.
save_template_title_series_sorting = 'library_order'

#: Set the list of words considered to be "articles" for sort strings
# Set the list of words that are to be considered 'articles' when computing the
# title sort strings. The articles differ by language. By default, calibre uses
# a combination of articles from English and whatever language the calibre user
# interface is set to. In addition, in some contexts where the book language is
# available, the language of the book is used. You can change the list of
# articles for a given language or add a new language by editing
# per_language_title_sort_articles. To tell calibre to use a language other
# than the user interface language, set, default_language_for_title_sort. For
# example, to use German, set it to 'deu'. A value of None means the user
# interface language is used. The setting title_sort_articles is ignored
# (present only for legacy reasons).
per_language_title_sort_articles = {
        # English
        'eng': (r'A\s+', r'The\s+', r'An\s+'),
        # Esperanto
        'epo': (r'La\s+', r"L'", 'L´'),
        # Spanish
        'spa': (r'El\s+', r'La\s+', r'Lo\s+', r'Los\s+', r'Las\s+', r'Un\s+',
                r'Una\s+', r'Unos\s+', r'Unas\s+'),
        # French
        'fra': (r'Le\s+', r'La\s+', r"L'", r'L´', r'L’', r'Les\s+', r'Un\s+', r'Une\s+',
                r'Des\s+', r'De\s+La\s+', r'De\s+', r"D'", r'D´', r'D’'),
        # Polish
        'pol': (),
        # Italian
        'ita': (r'Lo\s+', r'Il\s+', r"L'", r'L´', r'La\s+', r'Gli\s+',
                r'I\s+', r'Le\s+', r'Uno\s+', r'Un\s+', r'Una\s+', "rUn'",
                r'Un´', r'Dei\s+', r'Degli\s+', r'Delle\s+', r'Del\s+',
                r'Della\s+', r'Dello\s+', r"Dell'", r'Dell´'),
        # Portuguese
        'por': (r'A\s+', r'O\s+', r'Os\s+', r'As\s+', r'Um\s+', r'Uns\s+',
                r'Uma\s+', r'Umas\s+'),
        # Romanian
        'ron': (r'Un\s+', r'O\s+', r'Nişte\s+'),
        # German
        'deu': (r'Der\s+', r'Die\s+', r'Das\s+', r'Den\s+', r'Ein\s+',
                r'Eine\s+', r'Einen\s+', r'Dem\s+', r'Des\s+', r'Einem\s+',
                r'Eines\s+'),
        # Dutch
        'nld': (r'De\s+', r'Het\s+', r'Een\s+', r"'n\s+", r"'s\s+", r'Ene\s+',
                r'Ener\s+', r'Enes\s+', r'Den\s+', r'Der\s+', r'Des\s+',
                r"'t\s+"),
        # Swedish
        'swe': (r'En\s+', r'Ett\s+', r'Det\s+', r'Den\s+', r'De\s+'),
        # Turkish
        'tur': (r'Bir\s+',),
        # Afrikaans
        'afr': (r"'n\s+", r'Die\s+'),
        # Greek
        'ell': (r'O\s+', r'I\s+', r'To\s+', r'Ta\s+', r'Tus\s+', r'Tis\s+',
                r"'Enas\s+", r"'Mia\s+", r"'Ena\s+", r"'Enan\s+"),
        # Hungarian
        'hun': (r'A\s+', r'Az\s+', r'Egy\s+'),
}
default_language_for_title_sort = None
title_sort_articles = r'^(A|The|An)\s+'

#: Specify a folder calibre should connect to at startup
# Specify a folder that calibre should connect to at startup using
# connect_to_folder. This must be a full path to the folder. If the folder does
# not exist when calibre starts, it is ignored.
# Example for Windows:
#     auto_connect_to_folder = 'C:/Users/someone/Desktop/testlib'
# Example for other operating systems:
#     auto_connect_to_folder = '/home/dropbox/My Dropbox/someone/library'
auto_connect_to_folder = ''

#: Specify renaming rules for SONY collections
# Specify renaming rules for SONY collections. This tweak is only applicable if
# metadata management is set to automatic. Collections on SONYs are named
# depending upon whether the field is standard or custom. A collection derived
# from a standard field is named for the value in that field.
#
# For example, if the standard 'series' column contains the value 'Darkover', then the
# collection name is 'Darkover'. A collection derived from a custom field will
# have the name of the field added to the value. For example, if a custom series
# column named 'My Series' contains the name 'Darkover', then the collection
# will by default be named 'Darkover (My Series)'. For purposes of this
# documentation, 'Darkover' is called the value and 'My Series' is called the
# category. If two books have fields that generate the same collection name,
# then both books will be in that collection.
#
# This set of tweaks lets you specify for a standard or custom field how
# the collections are to be named. You can use it to add a description to a
# standard field, for example 'Foo (Tag)' instead of the 'Foo'. You can also use
# it to force multiple fields to end up in the same collection.
#
# For example, you could force the values in 'series', '#my_series_1', and
# '#my_series_2' to appear in collections named 'some_value (Series)', thereby
# merging all of the fields into one set of collections.
#
# There are two related tweaks. The first determines the category name to use
# for a metadata field.  The second is a template, used to determines how the
# value and category are combined to create the collection name.
# The syntax of the first tweak, sony_collection_renaming_rules, is:
# {'field_lookup_name':'category_name_to_use', 'lookup_name':'name', ...}
#
# The second tweak, sony_collection_name_template, is a template. It uses the
# same template language as plugboards and save templates. This tweak controls
# how the value and category are combined together to make the collection name.
# The only two fields available are {category} and {value}. The {value} field is
# never empty. The {category} field can be empty. The default is to put the
# value first, then the category enclosed in parentheses, it isn't empty:
# '{value} {category:|(|)}'
#
# Examples: The first three examples assume that the second tweak
# has not been changed.
#
# 1) I want three series columns to be merged into one set of collections. The
# column lookup names are 'series', '#series_1' and '#series_2'. I want nothing
# in the parenthesis. The value to use in the tweak value would be:
#    sony_collection_renaming_rules={'series':'', '#series_1':'', '#series_2':''}
#
# 2) I want the word '(Series)' to appear on collections made from series, and
# the word '(Tag)' to appear on collections made from tags. Use:
#   sony_collection_renaming_rules={'series':'Series', 'tags':'Tag'}
#
# 3) I want 'series' and '#myseries' to be merged, and for the collection name
# to have '(Series)' appended. The renaming rule is:
#   sony_collection_renaming_rules={'series':'Series', '#myseries':'Series'}
#
# 4) Same as example 2, but instead of having the category name in parentheses
# and appended to the value, I want it prepended and separated by a colon, such
# as in Series: Darkover. I must change the template used to format the category name
#
# The resulting two tweaks are:
#    sony_collection_renaming_rules={'series':'Series', 'tags':'Tag'}
#    sony_collection_name_template='{category:||: }{value}'
sony_collection_renaming_rules = {}
sony_collection_name_template = '{value}{category:| (|)}'

#: Specify how SONY collections are sorted
# Specify how SONY collections are sorted. This tweak is only applicable if
# metadata management is set to automatic. You can indicate which metadata is to
# be used to sort on a collection-by-collection basis. The format of the tweak
# is a list of metadata fields from which collections are made, followed by the
# name of the metadata field containing the sort value.
# Example: The following indicates that collections built from pubdate and tags
# are to be sorted by the value in the custom column '#mydate', that collections
# built from 'series' are to be sorted by 'series_index', and that all other
# collections are to be sorted by title. If a collection metadata field is not
# named, then if it is a series- based collection it is sorted by series order,
# otherwise it is sorted by title order.
# [(['pubdate', 'tags'],'#mydate'), (['series'],'series_index'), (['*'], 'title')]
# Note that the bracketing and parentheses are required. The syntax is
# [ ( [list of fields], sort field ) , ( [ list of fields ] , sort field ) ]
# Default: empty (no rules), so no collection attributes are named.
sony_collection_sorting_rules = []

#: Control how tags are applied when copying books to another library
# Set this to True to ensure that tags in 'Tags to add when adding
# a book' are added when copying books to another library
add_new_book_tags_when_importing_books = False

#: Set the maximum number of sort 'levels'
# Set the maximum number of sort 'levels' that calibre will use to resort the
# library after certain operations such as searches or device insertion. Each
# sort level adds a performance penalty. If the database is large (thousands of
# books) the penalty might be noticeable. If you are not concerned about multi-
# level sorts, and if you are seeing a slowdown, reduce the value of this tweak.
maximum_resort_levels = 5

#: Choose whether dates are sorted using visible fields
# Date values contain both a date and a time. When sorted, all the fields are
# used, regardless of what is displayed. Set this tweak to True to use only
# the fields that are being displayed.
sort_dates_using_visible_fields = False

#: Fuzz value for trimming covers
# The value used for the fuzz distance when trimming a cover.
# Colors within this distance are considered equal.
# The distance is in absolute intensity units.
cover_trim_fuzz_value = 10

#: Control behavior of the book list
# You can control the behavior of double clicks and pressing Enter on the books
# list. Choices: open_viewer, do_nothing, show_book_details,
# show_locked_book_details, edit_cell, edit_metadata. Selecting anything other
# than open_viewer, show_book_details, or show_locked_book_details has the side
# effect of disabling editing a field using a single click.
# Default: open_viewer.
# Example: doubleclick_on_library_view = 'do_nothing'
# You can also control whether the book list scrolls per item or
# per pixel. Default is per item.
doubleclick_on_library_view = 'open_viewer'
enter_key_behavior = 'do_nothing'
horizontal_scrolling_per_column = False
vertical_scrolling_per_row = False

#: Language to use when sorting
# Setting this tweak will force sorting to use the
# collating order for the specified language. This might be useful if you run
# calibre in English but want sorting to work in the language where you live.
# Set the tweak to the desired ISO 639-1 language code, in lower case.
# You can find the list of supported locales at
# https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
# Default: locale_for_sorting = '' -- use the language calibre displays in
# Example: locale_for_sorting = 'fr' -- sort using French rules.
# Example: locale_for_sorting = 'nb' -- sort using Norwegian rules.
locale_for_sorting = ''

#: The number of seconds to wait before sending emails
# The number of seconds to wait before sending emails when using a
# public email server like GMX/Hotmail/Gmail. Default is: 5 minutes
# Setting it to lower may cause the server's SPAM controls to kick in,
# making email sending fail. Changes will take effect only after a restart of
# calibre. You can also change the list of hosts that calibre considers
# to be public relays here. Any relay host ending with one of the suffixes
# in the list below will be considered a public email server.
public_smtp_relay_delay = 301
public_smtp_relay_host_suffixes = ['gmail.com', 'live.com', 'gmx.com', 'outlook.com']

#: The maximum width and height for covers saved in the calibre library
# All covers in the calibre library will be resized, preserving aspect ratio,
# to fit within this size. This is to prevent slowdowns caused by extremely
# large covers
maximum_cover_size = (1650, 2200)

#: Where to send downloaded news
# When automatically sending downloaded news to a connected device, calibre
# will by default send it to the main memory. By changing this tweak, you can
# control where it is sent. Valid values are "main", "carda", "cardb". Note
# that if there isn't enough free space available on the location you choose,
# the files will be sent to the location with the most free space.
send_news_to_device_location = 'main'

#: Unified toolbar on macOS
# If you enable this option and restart calibre, the toolbar will be 'unified'
# with the titlebar as is normal for macOS applications. However, doing this has
# various bugs, for instance the minimum width of the toolbar becomes twice
# what it should be and it causes other random bugs on some systems, so turn it
# on at your own risk!
unified_title_toolbar_on_osx = False

#: Save original file when converting/polishing from same format to same format
# When calibre does a conversion from the same format to the same format, for
# example, from EPUB to EPUB, the original file is saved, so that in case the
# conversion is poor, you can tweak the settings and run it again. By setting
# this to False you can prevent calibre from saving the original file.
# Similarly, by setting save_original_format_when_polishing to False you can
# prevent calibre from saving the original file when polishing.
save_original_format = True
save_original_format_when_polishing = True

#: Number of recently viewed books to show
# Right-clicking the "View" button shows a list of recently viewed books. Control
# how many should be shown, here.
gui_view_history_size = 15

#: Change the font size of the Book details panel in the interface
# Change the font size at which book details are rendered in the side panel and
# comments are rendered in the metadata edit dialog. Set it to a positive or
# negative number to increase or decrease the font size.
change_book_details_font_size_by = 0

#: What format to default to when using the "Unpack book" feature
# The "Unpack book" feature of calibre allows direct editing of a book format.
# If multiple formats are available, calibre will offer you a choice
# of formats, defaulting to your preferred output format if it is available.
# Set this tweak to a specific value of 'EPUB' or 'AZW3' to always default
# to that format rather than your output format preference.
# Set to a value of 'remember' to use whichever format you chose last time you
# used the "Unpack book" feature.
# Examples:
#   default_tweak_format = None       (Use output format)
#   default_tweak_format = 'EPUB'
#   default_tweak_format = 'remember'
default_tweak_format = None

#: Do not preselect a completion when editing authors/tags/series/etc.
# This means that you can make changes and press Enter and your changes will
# not be overwritten by a matching completion. However, if you wish to use the
# completions you will now have to press Tab to select one before pressing
# Enter. Which technique you prefer will depend on the state of metadata in
# your library and your personal editing style.
#
# If preselect_first_completion is False and you want Tab to accept what you
# typed instead of the first completion then set tab_accepts_uncompleted_text
# to True. If you do this then to select from the completions you must press
# the Down or Up arrow keys. The tweak tab_accepts_uncompleted_text is ignored
# if preselect_first_completion is True
preselect_first_completion = False
tab_accepts_uncompleted_text = False

#: Completion mode when editing authors/tags/series/etc.
# By default, when completing items, calibre will show you all the candidates
# that start with the text you have already typed. You can instead have it show
# all candidates that contain the text you have already typed. To do this, set
# completion_mode to 'contains'. For example, if you type asi it will match both
# Asimov and Quasimodo, whereas the default behavior would match only Asimov.
completion_mode = 'prefix'

#: Sort the list of libraries alphabetically
# The list of libraries in the Copy to library and Quick switch menus are
# normally sorted by most used. However, if there are more than a certain
# number of such libraries, the sorting becomes alphabetic. You can set that
# number here. The default is ten libraries.
many_libraries = 10

#: Choose available output formats for conversion
# Restrict the list of available output formats in the conversion dialogs.
# For example, if you only want to convert to EPUB and AZW3, change this to
# restrict_output_formats = ['EPUB', 'AZW3']. The default value of None causes
# all available output formats to be present.
restrict_output_formats = None

#: Set the thumbnail image quality used by the Content server
# The quality of a thumbnail is largely controlled by the compression quality
# used when creating it. Set this to a larger number to improve the quality.
# Note that the thumbnails get much larger with larger compression quality
# numbers.
# The value can be between 50 and 99
content_server_thumbnail_compression_quality = 75

#: Image file types to treat as e-books when dropping onto the "Book details" panel
# Normally, if you drop any image file in a format known to calibre onto the
# "Book details" panel, it will be used to set the cover. If you want to store
# some image types as e-books instead, you can set this tweak.
# Examples:
#    cover_drop_exclude = {'tiff', 'webp'}
cover_drop_exclude = ()

#: Exclude fields when copy/pasting metadata
# You can ask calibre to not paste some metadata fields when using the
# Edit metadata->Copy metadata/Paste metadata actions. For example,
# exclude_fields_on_paste = ['cover', 'timestamp', '#mycolumn']
# to prevent pasting of the cover, Date and custom column, mycolumn.
# You can also add a shortcut in Preferences->Shortcuts->Edit metadata
# to paste metadata ignoring this tweak.
exclude_fields_on_paste = []

#: Skip internet connected check
# Skip checking whether the internet is available before downloading news.
# Useful if for some reason your operating systems network checking
# facilities are not reliable (for example NetworkManager on Linux).
skip_network_check = False

#: Tab stop width in the template editor
# Sets the width of the tab stop in the template editor in "average characters".
# For example, a value of 1 results in a space with the width of one average character.
template_editor_tab_stop_width = 4

#: Value for undefined numbers when sorting
# Sets the value to use for undefined numbers when sorting.
# For example, the value -10 sorts undefined numbers as if they were set to -10.
# Use 'maximum' for the largest possible number. Use 'minimum' for the smallest
# possible number. Quotes are optional if entering a number.
# Examples:
#   value_for_undefined_numbers_when_sorting = -100
#   value_for_undefined_numbers_when_sorting = '2'
#   value_for_undefined_numbers_when_sorting = -0.01
#   value_for_undefined_numbers_when_sorting = 'minimum'
#   value_for_undefined_numbers_when_sorting = 'maximum'
value_for_undefined_numbers_when_sorting = 0

#: Allow template database functions in composite columns
# If True then the template database functions book_values() and book_count()
# can be used in composite custom columns. Note: setting this tweak to True and
# using these functions in composites can be very slow.
# Default: False
allow_template_database_functions_in_composites = False


#: Change the programs that are run when opening files/URLs
# By default, calibre passes URLs to the operating system to open using
# whatever default programs are configured there. Here you can override
# that by specifying the program to use, per URL type. For local files,
# the type is "file" and for web links it is "http*". For example:
# openers_by_scheme = { "http*": "firefox %u" } will make calibre run Firefox
# for https://whatever URLs. %u is replaced by the URL to be opened. The scheme
# takes a glob pattern allowing a single entry to match multiple URL types.
openers_by_scheme = {}

#: Set the first day of the week for calendar popups
# It must be one of the values Default, Sunday, Monday, Tuesday, Wednesday,
# Thursday, Friday, or Saturday, all in English, spelled exactly as shown.
calendar_start_day_of_week = 'Default'

#: East Asian language to use for transliteration
# Setting this tweak will make calibre use the specified language as the "base"
# language when transliterating East Asian languages to English. This might be
# useful if you run calibre in English but want text transliterated to
# Japanese instead of Chinese. The valid values are:
#   'ja' for Japanese
#   'kr' for Korean
#   'vn' for Vietnamese
#   'zh' for Chinese
# Any other value will use the language set in calibre preferences as the base
# language. A base language other than those in the above list causes transliteration
# with a base language of Chinese.
# Example: east_asian_base_language = 'ja'
east_asian_base_language = ''