Embed the translation files in the monero-wallet-gui binary

If a translation file exists in a "translations" directory located in the same
directory as the binary, it is used in priority (this can be useful when working
on translations as you don't have to recompile the whole program all the time),
and if no such file is found the embedded translation file is used.

TranslationManager.cpp

@@ -25,19 +25,12 @@ bool TranslationManager::setLanguage(const QString &language)
         return true;
     }
 
-    // translations are compiled into app binary
-#ifdef Q_OS_MACX
-    QString dir = qApp->applicationDirPath() + "/../Resources/translations";
-#else
     QString dir = qApp->applicationDirPath() + "/translations";
-#endif
-
     QString filename = "monero-core_" + language;
 
-    qDebug("%s: loading translation file '%s' from '%s",
+    qDebug("%s: loading translation file '%s' from '%s'",
            __FUNCTION__, qPrintable(filename), qPrintable(dir));
 
-
     if (m_translator->load(filename, dir)) {
         qDebug("%s: translation for language '%s' loaded successfully",
                __FUNCTION__, qPrintable(language));
@@ -45,11 +38,24 @@ bool TranslationManager::setLanguage(const QString &language)
         qApp->installTranslator(m_translator);
         emit languageChanged();
         return true;
-    } else {
+    }
+
+    qDebug("%s: couldn't load translation file '%s' from '%s'",
+           __FUNCTION__, qPrintable(filename), qPrintable(dir));
+    qDebug("%s: loading embedded translation file '%s'",
+           __FUNCTION__, qPrintable(filename));
+
+    if (m_translator->load(filename, ":")) {
+        qDebug("%s: embedded translation for language '%s' loaded successfully",
+               __FUNCTION__, qPrintable(language));
+        qApp->installTranslator(m_translator);
+        emit languageChanged();
+        return true;
+    }
+
     qCritical("%s: error loading translation for language '%s'",
               __FUNCTION__, qPrintable(language));
     return false;
-    }
 }
 
 TranslationManager *TranslationManager::instance()

monero-wallet-gui.pro

@@ -327,38 +327,7 @@ macx {
 
 
 # translation stuff
-TRANSLATIONS =  \ # English is default language, no explicit translation file
+TRANSLATIONS = $$files($$PWD/translations/monero-core_*.ts)
-                $$PWD/translations/monero-core.ts \ # translation source (copy this file when creating a new translation)
-                $$PWD/translations/monero-core_ar.ts \ # Arabic
-                $$PWD/translations/monero-core_pt-br.ts \ # Portuguese (Brazil)
-                $$PWD/translations/monero-core_de.ts \ # German
-                $$PWD/translations/monero-core_eo.ts \ # Esperanto
-                $$PWD/translations/monero-core_es.ts \ # Spanish
-                $$PWD/translations/monero-core_fi.ts \ # Finnish
-                $$PWD/translations/monero-core_fr.ts \ # French
-                $$PWD/translations/monero-core_hr.ts \ # Croatian
-                $$PWD/translations/monero-core_id.ts \ # Indonesian
-                $$PWD/translations/monero-core_hi.ts \ # Hindi
-                $$PWD/translations/monero-core_it.ts \ # Italian
-                $$PWD/translations/monero-core_ja.ts \ # Japanese
-                $$PWD/translations/monero-core_nl.ts \ # Dutch
-                $$PWD/translations/monero-core_pl.ts \ # Polish
-                $$PWD/translations/monero-core_ru.ts \ # Russian
-                $$PWD/translations/monero-core_sv.ts \ # Swedish
-                $$PWD/translations/monero-core_zh-cn.ts \ # Chinese (Simplified-China)
-                $$PWD/translations/monero-core_zh-tw.ts \ # Chinese (Traditional-Taiwan)
-                $$PWD/translations/monero-core_he.ts \ # Hebrew
-                $$PWD/translations/monero-core_ko.ts \ # Korean
-                $$PWD/translations/monero-core_ro.ts \ # Romanian
-                $$PWD/translations/monero-core_da.ts \ # Danish
-                $$PWD/translations/monero-core_cs.ts \ # Czech
-                $$PWD/translations/monero-core_sk.ts \ # Slovak
-                $$PWD/translations/monero-core_sl.ts \ # Slovenian
-                $$PWD/translations/monero-core_rs.ts \ # Serbian
-                $$PWD/translations/monero-core_cat.ts \ # Catalan
-                $$PWD/translations/monero-core_tr.ts \ # Turkish
-                $$PWD/translations/monero-core_ua.ts \ # Ukrainian
-                $$PWD/translations/monero-core_pt-pt.ts \ # Portuguese (Portugal)
 
 CONFIG(release, debug|release) {
     DESTDIR = release/bin
@@ -371,14 +340,7 @@ CONFIG(release, debug|release) {
 #    LANGREL_OPTIONS = -markuntranslated "MISS_TR "
 }
 
-TARGET_FULL_PATH = $$OUT_PWD/$$DESTDIR
+TRANSLATION_TARGET_DIR = $$OUT_PWD/translations
-TRANSLATION_TARGET_DIR = $$TARGET_FULL_PATH/translations
-
-macx {
-    TARGET_FULL_PATH = $$sprintf("%1/%2/%3.app", $$OUT_PWD, $$DESTDIR, $$TARGET)
-    TRANSLATION_TARGET_DIR = $$TARGET_FULL_PATH/Contents/Resources/translations
-}
-
 
 !ios {
     isEmpty(QMAKE_LUPDATE) {
@@ -405,13 +367,29 @@ macx {
 
     QMAKE_EXTRA_TARGETS += langupd deploy deploy_win
     QMAKE_EXTRA_COMPILERS += langrel
+
+    # Compile an initial version of translation files when running qmake
+    # the first time and generate the resource file for translations.
+    !exists($$TRANSLATION_TARGET_DIR) {
+        mkpath($$TRANSLATION_TARGET_DIR)
+    }
+    qrc_entry = "<RCC>"
+    qrc_entry += '  <qresource prefix="/">'
+    write_file($$TRANSLATION_TARGET_DIR/translations.qrc, qrc_entry)
+    for(tsfile, TRANSLATIONS) {
+        qmfile = $$TRANSLATION_TARGET_DIR/$$basename(tsfile)
+        qmfile ~= s/.ts$/.qm/
+        system($$LANGREL $$LANGREL_OPTIONS $$tsfile -qm $$qmfile)
+        qrc_entry = "    <file>$$basename(qmfile)</file>"
+        write_file($$TRANSLATION_TARGET_DIR/translations.qrc, qrc_entry, append)
+    }
+    qrc_entry = "  </qresource>"
+    qrc_entry += "</RCC>"
+    write_file($$TRANSLATION_TARGET_DIR/translations.qrc, qrc_entry, append)
+    RESOURCES += $$TRANSLATION_TARGET_DIR/translations.qrc
 }
 
 
-
-
-
-
 # Update: no issues with the "slow link process" anymore,
 # for development, just build debug version of libwallet_merged lib
 # by invoking 'get_libwallet_api.sh Debug'
@@ -432,7 +410,7 @@ macx {
 }
 
 win32 {
-    deploy.commands += windeployqt $$sprintf("%1/%2/%3.exe", $$OUT_PWD, $$DESTDIR, $$TARGET) -release -qmldir=$$PWD
+    deploy.commands += windeployqt $$sprintf("%1/%2/%3.exe", $$OUT_PWD, $$DESTDIR, $$TARGET) -release -no-translations -qmldir=$$PWD
     # Win64 msys2 deploy settings
     contains(QMAKE_HOST.arch, x86_64) {
         deploy.commands += $$escape_expand(\n\t) $$PWD/windeploy_helper.sh $$DESTDIR