dandelion/app/src/main/java/net/gsantner/opoc/ui/LanguagePreference.java

182 lines
6.9 KiB
Java

/*
* ------------------------------------------------------------------------------
* Gregor Santner <gsantner.net> wrote this. You can do whatever you want
* with it. If we meet some day, and you think it is worth it, you can buy me a
* coke in return. Provided as is without any kind of warranty. Do not blame or
* sue me if something goes wrong. No attribution required. - Gregor Santner
*
* License: Creative Commons Zero (CC0 1.0)
* http://creativecommons.org/publicdomain/zero/1.0/
* ----------------------------------------------------------------------------
*/
/*
* A ListPreference that displays a list of available languages
* Requires:
* The BuildConfig field "APPLICATION_LANGUAGES" which is a array of all available languages
* opoc/ContextUtils
* BuildConfig field can be defined by using the method below
buildConfigField("String[]", "APPLICATION_LANGUAGES", '{' + getUsedAndroidLanguages().collect {"\"${it}\""}.join(",") + '}')
@SuppressWarnings(["UnnecessaryQualifiedReference", "SpellCheckingInspection", "GroovyUnusedDeclaration"])
static String[] getUsedAndroidLanguages() {
Set<String> langs = new HashSet<>()
new File('.').eachFileRecurse(groovy.io.FileType.DIRECTORIES) {
final foldername = it.name
if (foldername.startsWith('values-') && !it.canonicalPath.contains("build" + File.separator + "intermediates")) {
new File(it.toString()).eachFileRecurse(groovy.io.FileType.FILES) {
if (it.name.toLowerCase().endsWith(".xml") && it.getCanonicalFile().getText('UTF-8').contains("<string")) {
langs.add(foldername.replace("values-", ""))
}
}
}
}
return langs.toArray(new String[langs.size()])
}
* Summary: Change language of this app. Restart app for changes to take effect
* Define element in Preferences-XML:
<net.gsantner.opoc.ui.LanguagePreference
android:icon="@drawable/ic_language_black_24dp"
android:key="@string/pref_key__language"
android:summary="@string/pref_desc__language"
android:title="@string/pref_title__language"/>
*/
package net.gsantner.opoc.ui;
import android.annotation.TargetApi;
import android.content.Context;
import android.os.Build;
import android.preference.ListPreference;
import android.support.annotation.Nullable;
import android.text.TextUtils;
import android.util.AttributeSet;
import net.gsantner.opoc.util.ContextUtils;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
/**
* A {@link android.preference.ListPreference} that displays a list of languages to select from
*/
@SuppressWarnings({"unused", "SpellCheckingInspection", "WeakerAccess"})
public class LanguagePreference extends ListPreference {
private static final String SYSTEM_LANGUAGE_CODE = "";
// The language of res/values/ -> (usually English)
public String _systemLanguageName = "★System★";
public String _defaultLanguageCode = "en";
public LanguagePreference(Context context) {
super(context);
loadLangs(context, null);
}
public LanguagePreference(Context context, AttributeSet attrs) {
super(context, attrs);
loadLangs(context, attrs);
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public LanguagePreference(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
loadLangs(context, attrs);
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public LanguagePreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
loadLangs(context, attrs);
}
@Override
protected boolean callChangeListener(Object newValue) {
if (newValue instanceof String) {
// Does not apply to existing UI, use recreate()
new ContextUtils(getContext()).setAppLanguage((String) newValue);
}
return super.callChangeListener(newValue);
}
private void loadLangs(Context context) {
loadLangs(context, null);
}
private void loadLangs(Context context, @Nullable AttributeSet attrs) {
setDefaultValue(SYSTEM_LANGUAGE_CODE);
// Fetch readable details
ContextUtils contextUtils = new ContextUtils(context);
List<String> languages = new ArrayList<>();
Object bcof = contextUtils.getBuildConfigValue("APPLICATION_LANGUAGES");
if (bcof instanceof String[]) {
for (String langId : (String[]) bcof) {
Locale locale = contextUtils.getLocaleByAndroidCode(langId);
languages.add(summarizeLocale(locale) + ";" + langId);
}
}
// Sort languages naturally
Collections.sort(languages);
// Show in UI
String[] entries = new String[languages.size() + 2];
String[] entryval = new String[languages.size() + 2];
for (int i = 0; i < languages.size(); i++) {
entries[i + 2] = languages.get(i).split(";")[0];
entryval[i + 2] = languages.get(i).split(";")[1];
}
entryval[0] = SYSTEM_LANGUAGE_CODE;
entries[0] = _systemLanguageName + "\n[" + summarizeLocale(context.getResources().getConfiguration().locale) + "]";
entryval[1] = _defaultLanguageCode;
entries[1] = summarizeLocale(contextUtils.getLocaleByAndroidCode(_defaultLanguageCode));
setEntries(entries);
setEntryValues(entryval);
}
// Concat english and localized language name
// Append country if country specific (e.g. Portuguese Brazil)
private String summarizeLocale(Locale locale) {
String country = locale.getDisplayCountry(locale);
String language = locale.getDisplayLanguage(locale);
return locale.getDisplayLanguage(Locale.ENGLISH)
+ " (" + language.substring(0, 1).toUpperCase(Locale.getDefault()) + language.substring(1)
+ ((!country.isEmpty() && !country.toLowerCase(Locale.getDefault()).equals(language.toLowerCase(Locale.getDefault()))) ? (", " + country) : "")
+ ")";
}
// Add current language to summary
@Override
public CharSequence getSummary() {
Locale locale = new ContextUtils(getContext()).getLocaleByAndroidCode(getValue());
String prefix = TextUtils.isEmpty(super.getSummary())
? "" : super.getSummary() + "\n\n";
return prefix + summarizeLocale(locale);
}
public String getSystemLanguageName() {
return _systemLanguageName;
}
public void setSystemLanguageName(String systemLanguageName) {
_systemLanguageName = systemLanguageName;
loadLangs(getContext());
}
public String getDefaultLanguageCode() {
return _defaultLanguageCode;
}
public void setDefaultLanguageCode(String defaultLanguageCode) {
_defaultLanguageCode = defaultLanguageCode;
loadLangs(getContext());
}
}