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koreader/frontend/apps/reader/modules/readerhyphenation.lua
poire-z 2dc604bb74 Allow for setting a default or fallback hyph dictionary
It makes no sense to have both, so setting a default removes
the fallback, and setting a fallback removes the default.
Also save hyph_alg to document setting only if it has been
manually chosen, so that later changes to default or fallback
can be used.
2017-04-29 14:48:42 +02:00

143 lines
5.5 KiB
Lua

local InfoMessage = require("ui/widget/infomessage")
local InputContainer = require("ui/widget/container/inputcontainer")
local JSON = require("json")
local MultiConfirmBox = require("ui/widget/multiconfirmbox")
local UIManager = require("ui/uimanager")
local util = require("util")
local _ = require("gettext")
local T = require("ffi/util").template
local ReaderHyphenation = InputContainer:new{
hyph_menu_title = _("Hyphenation"),
hyph_table = nil,
}
function ReaderHyphenation:init()
self.lang_table = {}
self.hyph_table = {}
self.hyph_alg = cre.getSelectedHyphDict()
local lang_data_file = assert(io.open("./data/hyph/languages.json"), "r")
local ok, lang_data = pcall(JSON.decode, lang_data_file:read("*all"))
if ok and lang_data then
for k,v in ipairs(lang_data) do
table.insert(self.hyph_table, {
text = v.name,
callback = function()
self.hyph_alg = v.filename
self.ui.doc_settings:saveSetting("hyph_alg", self.hyph_alg)
UIManager:show(InfoMessage:new{
text = T(_("Changed hyphenation to %1."), v.name),
})
self.ui.document:setHyphDictionary(v.filename)
self.ui.toc:onUpdateToc()
end,
hold_callback = function()
UIManager:show(MultiConfirmBox:new{
-- No real need for a way to remove default one, we can just
-- toggle between setting a default OR a fallback (if a default
-- one is set, no fallback will ever be used - if a fallback one
-- is set, no default is wanted; so when we set one below, we
-- remove the other).
text = T( _("Set default or fallback hyphenation pattern to %1?\nDefault will always take precedence while fallback will only be used if the language of the book can't be automatically determined."), v.name),
choice1_text = _("Default"),
choice1_callback = function()
G_reader_settings:saveSetting("hyph_alg_default", v.filename)
G_reader_settings:delSetting("hyph_alg_fallback")
end,
choice2_text = _("Fallback"),
choice2_callback = function()
G_reader_settings:saveSetting("hyph_alg_fallback", v.filename)
G_reader_settings:delSetting("hyph_alg_default")
end,
})
end,
checked_func = function()
return v.filename == self.hyph_alg
end
})
self.lang_table[v.language] = v.filename
if v.aliases then
for i,alias in ipairs(v.aliases) do
self.lang_table[alias] = v.filename
end
end
end
end
self.ui.menu:registerToMainMenu(self)
end
function ReaderHyphenation:parseLanguageTag(lang_tag)
-- Parse an RFC 5646 language tag, like "en-US" or "en".
-- https://tools.ietf.org/html/rfc5646
-- We are only interested in the language and region parts.
local language = nil
local region = nil
for part in util.gsplit(lang_tag, "-", false) do
if not language then
language = string.lower(part)
elseif string.len(part) == 2 and not string.match(part, "[^%a]") then
region = string.upper(part)
end
end
return language, region
end
function ReaderHyphenation:getDictForLanguage(lang_tag)
-- EPUB language is an RFC 5646 language tag.
-- http://www.idpf.org/epub/301/spec/epub-publications.html#sec-opf-dclanguage
--
-- FB2 language is a two-letter language code
-- (which is also a valid RFC 5646 language tag).
-- http://fictionbook.org/index.php/%D0%AD%D0%BB%D0%B5%D0%BC%D0%B5%D0%BD%D1%82_lang (in Russian)
local language, region = self:parseLanguageTag(lang_tag)
if not language then
return
end
local dict
if region then
dict = self.lang_table[language .. '-' .. region]
end
if not dict then
dict = self.lang_table[language]
end
return dict
end
function ReaderHyphenation:onPreRenderDocument(config)
-- This is called after the document has been loaded
-- so we can use the document language.
-- Use the one manually set for this document
local hyph_alg = config:readSetting("hyph_alg")
if not hyph_alg then -- If none, use the one manually set as default (with Hold)
hyph_alg = G_reader_settings:readSetting("hyph_alg_default")
end
if not hyph_alg then -- If none, use the one associated with document's language
hyph_alg = self:getDictForLanguage(self.ui.document:getProps().language)
end
if not hyph_alg then -- If none, use the one manually set as fallback (with Hold)
hyph_alg = G_reader_settings:readSetting("hyph_alg_fallback")
end
if hyph_alg then
self.ui.document:setHyphDictionary(hyph_alg)
end
-- If we haven't set any, hardcoded English_US_hyphen_(Alan).pdb (in cre.cpp) will be used
self.hyph_alg = cre.getSelectedHyphDict()
end
function ReaderHyphenation:addToMainMenu(menu_items)
-- insert table to main reader menu
menu_items.hyphenation = {
text = self.hyph_menu_title,
sub_item_table = self.hyph_table,
}
end
return ReaderHyphenation