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Code Issues Projects Releases Wiki Activity

adds "Translation settings" menu

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and the list of 104 languages supported by Google Translate
pull/4408/head
poire-z 5 years ago committed by Frans de Jonge
parent 22b7f17cd8
commit 80cb9d0db1
3 changed files with 217 additions and 17 deletions
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3
frontend/apps/reader/modules/readerhighlight.lua
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@ -5,6 +5,7 @@ local Event = require("ui/event")
local InfoMessage = require("ui/widget/infomessage")
local InputContainer = require("ui/widget/container/inputcontainer")
local TimeVal = require("ui/timeval")
local Translator = require("ui/translator")
local UIManager = require("ui/uimanager")
local logger = require("logger")
local _ = require("gettext")
@ -73,6 +74,7 @@ function ReaderHighlight:addToMainMenu(menu_items)
text = _("Highlighting"),
sub_item_table = self:genHighlightDrawerMenu(),
}
menu_items.translation_settings = Translator:genSettingsMenu()
end
local highlight_style = {
@ -503,7 +505,6 @@ function ReaderHighlight:translate(selected_text)
end
function ReaderHighlight:onTranslateText(text)
local Translator = require("ui/translator")
Translator:showTranslation(text)
end

2
frontend/ui/elements/reader_menu_order.lua
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@ -102,6 +102,8 @@ local order = {
"wikipedia_history",
"wikipedia_settings",
"----------------------------",
"translation_settings",
"----------------------------",
"goodreads",
"----------------------------",
"fulltext_search",

229
frontend/ui/translator.lua
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@ -9,8 +9,133 @@ This module translates text using Google Translate.
-- https://github.com/ssut/py-googletrans/blob/master/googletrans/client.py
-- https://stackoverflow.com/questions/26714426/what-is-the-meaning-of-google-translate-query-params
local InfoMessage = require("ui/widget/infomessage")
local TextViewer = require("ui/widget/textviewer")
local UIManager = require("ui/uimanager")
local JSON = require("json")
local Screen = require("device").screen
local ffiutil = require("ffi/util")
local logger = require("logger")
local util = require("util")
local T = require("ffi/util").template
local _ = require("gettext")
-- From https://cloud.google.com/translate/docs/languages
-- 20181217: 104 supported languages
local AUTODETECT_LANGUAGE = "auto"
local SUPPORTED_LANGUAGES = {
af = _("Afrikaans"),
sq = _("Albanian"),
am = _("Amharic"),
ar = _("Arabic"),
hy = _("Armenian"),
az = _("Azerbaijani"),
eu = _("Basque"),
be = _("Belarusian"),
bn = _("Bengali"),
bs = _("Bosnian"),
bg = _("Bulgarian"),
ca = _("Catalan"),
ceb = _("Cebuano"),
zh = _("Chinese (Simplified)"), -- "Simplified Chinese may be specified either by zh-CN or zh"
zh_TW = _("Chinese (Traditional)"), -- converted to "zh-TW" below
co = _("Corsican"),
hr = _("Croatian"),
cs = _("Czech"),
da = _("Danish"),
nl = _("Dutch"),
en = _("English"),
eo = _("Esperanto"),
et = _("Estonian"),
fi = _("Finnish"),
fr = _("French"),
fy = _("Frisian"),
gl = _("Galician"),
ka = _("Georgian"),
de = _("German"),
el = _("Greek"),
gu = _("Gujarati"),
ht = _("Haitian Creole"),
ha = _("Hausa"),
haw = _("Hawaiian"),
he = _("Hebrew"), -- "Hebrew may be specified either by he or iw"
hi = _("Hindi"),
hmn = _("Hmong"),
hu = _("Hungarian"),
is = _("Icelandic"),
ig = _("Igbo"),
id = _("Indonesian"),
ga = _("Irish"),
it = _("Italian"),
ja = _("Japanese"),
jw = _("Javanese"),
kn = _("Kannada"),
kk = _("Kazakh"),
km = _("Khmer"),
ko = _("Korean"),
ku = _("Kurdish"),
ky = _("Kyrgyz"),
lo = _("Lao"),
la = _("Latin"),
lv = _("Latvian"),
lt = _("Lithuanian"),
lb = _("Luxembourgish"),
mk = _("Macedonian"),
mg = _("Malagasy"),
ms = _("Malay"),
ml = _("Malayalam"),
mt = _("Maltese"),
mi = _("Maori"),
mr = _("Marathi"),
mn = _("Mongolian"),
my = _("Myanmar (Burmese)"),
ne = _("Nepali"),
no = _("Norwegian"),
ny = _("Nyanja (Chichewa)"),
ps = _("Pashto"),
fa = _("Persian"),
pl = _("Polish"),
pt = _("Portuguese"),
pa = _("Punjabi"),
ro = _("Romanian"),
ru = _("Russian"),
sm = _("Samoan"),
gd = _("Scots Gaelic"),
sr = _("Serbian"),
st = _("Sesotho"),
sn = _("Shona"),
sd = _("Sindhi"),
si = _("Sinhala (Sinhalese)"),
sk = _("Slovak"),
sl = _("Slovenian"),
so = _("Somali"),
es = _("Spanish"),
su = _("Sundanese"),
sw = _("Swahili"),
sv = _("Swedish"),
tl = _("Tagalog (Filipino)"),
tg = _("Tajik"),
ta = _("Tamil"),
te = _("Telugu"),
th = _("Thai"),
tr = _("Turkish"),
uk = _("Ukrainian"),
ur = _("Urdu"),
uz = _("Uzbek"),
vi = _("Vietnamese"),
cy = _("Welsh"),
xh = _("Xhosa"),
yi = _("Yiddish"),
yo = _("Yoruba"),
zu = _("Zulu"),
}
-- Fix zh_TW => zh-TW:
SUPPORTED_LANGUAGES["zh-TW"] = SUPPORTED_LANGUAGES["zh_TW"]
SUPPORTED_LANGUAGES["zh_TW"] = nil
local ALT_LANGUAGE_CODES = {}
ALT_LANGUAGE_CODES["zh-CN"] = "zh"
ALT_LANGUAGE_CODES["iw"] = "he"
local Translator = {
trans_servers = {
@ -51,9 +176,86 @@ function Translator:getTransServer()
return G_reader_settings:readSetting("trans_server") or self.trans_servers[1]
end
function Translator:getLanguageName(lang, default_string)
if SUPPORTED_LANGUAGES[lang] then
return SUPPORTED_LANGUAGES[lang]
elseif ALT_LANGUAGE_CODES[lang] then
return SUPPORTED_LANGUAGES[ALT_LANGUAGE_CODES[lang]]
elseif lang then
return lang:upper()
end
return default_string
end
-- Will be called by ReaderHighlight to make it available in Reader menu
function Translator:genSettingsMenu()
local function genLanguagesItems(setting_name, default_checked_item)
local items_table = {}
for lang_key, lang_name in ffiutil.orderedPairs(SUPPORTED_LANGUAGES) do
table.insert(items_table, {
text_func = function()
return T("%1 (%2)", lang_name, lang_key)
end,
checked_func = function()
if G_reader_settings:readSetting(setting_name) then
return lang_key == G_reader_settings:readSetting(setting_name)
else
return lang_key == default_checked_item
end
end,
callback = function()
G_reader_settings:saveSetting(setting_name, lang_key)
end,
})
end
return items_table
end
return {
text = _("Translation settings"),
sub_item_table = {
{
text = _("Auto-detect source language"),
checked_func = function()
return G_reader_settings:nilOrTrue("translator_from_auto_detect")
end,
callback = function()
G_reader_settings:flipNilOrTrue("translator_from_auto_detect")
end,
},
{
text_func = function()
local lang = G_reader_settings:readSetting("translator_from_language")
return T(_("Translate from: %1"), self:getLanguageName(lang, ""))
end,
enabled_func = function()
return not G_reader_settings:nilOrTrue("translator_from_auto_detect")
end,
sub_item_table = genLanguagesItems("translator_from_language"),
keep_menu_open = true,
separator = true,
},
{
text_func = function()
local lang = self:getTargetLanguage()
return T(_("Translate to: %1"), self:getLanguageName(lang, ""))
end,
sub_item_table = genLanguagesItems("translator_to_language", self:getTargetLanguage()),
keep_menu_open = true,
},
},
}
end
function Translator:getSourceLanguage()
if G_reader_settings:isFalse("translator_from_auto_detect") and
G_reader_settings:readSetting("translator_from_language") then
return G_reader_settings:readSetting("translator_from_language")
end
return AUTODETECT_LANGUAGE -- "auto"
end
function Translator:getTargetLanguage()
-- One can manually set his prefered target language
local lang = G_reader_settings:readSetting("translator_target_language")
local lang = G_reader_settings:readSetting("translator_to_language")
if not lang then
-- Fallback to the UI language the user has selected
lang = G_reader_settings:readSetting("language")
@ -165,7 +367,7 @@ Tries to automatically detect language of `text`.
@treturn string lang (`"en"`, `"fr"`, `…`)
--]]
function Translator:detect(text)
local result = self:loadPage(text, "en", "auto")
local result = self:loadPage(text, "en", AUTODETECT_LANGUAGE)
if result and result[3] then
local src_lang = result[3]
logger.dbg("detected language:", src_lang)
@ -188,7 +390,7 @@ function Translator:translate(text, target_lang, source_lang)
target_lang = self:getTargetLanguage()
end
if not source_lang then
source_lang = "auto"
source_lang = self:getSourceLanguage()
end
local result = self:loadPage(text, target_lang, source_lang)
if result and result[1] and type(result[1]) == "table" then
@ -223,22 +425,14 @@ function Translator:showTranslation(text, target_lang, source_lang)
end
function Translator:_showTranslation(text, target_lang, source_lang)
local InfoMessage = require("ui/widget/infomessage")
local TextViewer = require("ui/widget/textviewer")
local Trapper = require("ui/trapper")
local UIManager = require("ui/uimanager")
local util = require("util")
local Screen = require("device").screen
local T = require("ffi/util").template
local _ = require("gettext")
if not target_lang then
target_lang = self:getTargetLanguage()
end
if not source_lang then
source_lang = "auto"
source_lang = self:getSourceLanguage()
end
local Trapper = require("ui/trapper")
local completed, result = Trapper:dismissableRunInSubprocess(function()
return self:loadPage(text, target_lang, source_lang)
end, _("Querying translation service…"))
@ -297,9 +491,12 @@ function Translator:_showTranslation(text, target_lang, source_lang)
-- table.insert(output, require("dump")(result)) -- for debugging
UIManager:show(TextViewer:new{
title = T(_("Translation from %1 to %2"), source_lang:upper(), target_lang:upper()),
title = T(_("Translation from %1"), self:getLanguageName(source_lang, "?")),
-- Showing the translation target language in this title may make
-- it quite long and wrapped, taking valuable vertical spacing
text = table.concat(output, "\n"),
height = Screen:getHeight() * 3/4,
height = Screen:getHeight() * 4/5,
justified = G_reader_settings:nilOrTrue("dict_justify"),
})
end

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