refactor: rework the localization related part

.gitignore

@@ -1,2 +1,3 @@
 *.user
 *.user.*
+translations/*.qm

Caesium.pro

@@ -46,20 +46,22 @@ RESOURCES += \
 
 RC_FILE = caesium.rc
 
-TRANSLATIONS = caesium_en.ts \
-                caesium_it.ts \
-                caesium_ja.ts \
-                caesium_fr.ts \
-                caesium_br.ts \
-                caesium_de.ts \
-                caesium_tw.ts \
-                caesium_sv.ts \
-                caesium_cn.ts \
-                caesium_pt-br.ts \
-                caesium_es.ts \
-                caesium_kr.ts \
-                caesium_gr.ts \
-                caesium_ru.ts
+TRANSLATIONS = \
+    translations/caesium.ts \
+    translations/caesium_en_US.ts \
+    translations/caesium_it.ts \
+    translations/caesium_ja.ts \
+    translations/caesium_fr.ts \
+    translations/caesium_br.ts \
+    translations/caesium_de.ts \
+    translations/caesium_zh_TW.ts \
+    translations/caesium_sv.ts \
+    translations/caesium_zh_CN.ts \
+    translations/caesium_pt_BR.ts \
+    translations/caesium_es.ts \
+    translations/caesium_ko.ts \
+    translations/caesium_el_GR.ts \
+    translations/caesium_ru.ts
 
 LIBS += -lQt5Concurrent
 

README.md

@@ -0,0 +1,10 @@
+## Caesium (fork)
+
+based on Caesium 1.7.0. You can get the original source code at [here](https://sourceforge.net/projects/caesium/files/1.7.0/). Changes made by this fork listed below.
+
+### Resolved issues
+
+ - Remove country/region flags since the original filename have encoding issue which can cause a build failure, and also to avoid some potential regional internationalization issues. (216e1a9)
+ - Resolution display as -1x-1 for some images with unregular filename (e.g. `2IGYT%BD]SYY77Q7R041(WD.jpg` and `G9E@W$_Y4GYMWJY)%R24X~2.jpg`): Recompile under newer Qt version should works. Original Caesium official binary comes with Qt 5.1.0, Recompiled and tested under Qt 5.15.2.
+ - Click "Auto preview" checkbox and then click any image item will lead a crash. (0e3d5c5)
+

lupdate.bat

@@ -1,2 +0,0 @@
-C:\Qt\Qt5.1.0\5.1.0\mingw48_32\bin\lupdate.exe C:\Users\Matteo\Documents\Progetti\Qt4\Caesium\Source\caesium.pro
-pause

main.cpp

@@ -1,6 +1,7 @@
 /*******************************************************************************
 #
 # Copyright (C) 2010-2013 Matteo Paonessa <matteo.paonessa@gmail.com>
+#               2021      Gary Wang       <wzc782970009@gmail.com>
 #
 # This file is part of the Caesium distribution.
 #
@@ -19,6 +20,7 @@
 # Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
 #
 # Author: Matteo Paonessa <matteo.paonessa@gmail.com>
+#         Gary Wang       <wzc782970009@gmail.com>
 #
 # ******************************************************************************/
 
@@ -30,37 +32,10 @@
 #include <QDebug>
 #include <QTextStream>
 
-QString findLocaleN(int n, QString dir)
-{
-    QDir langDir(dir + "/language");
-    QStringList list = langDir.entryList(QStringList("*.qm"), QDir::Files, QDir::Name);
-    for (int i = list.length() - 1; i >= 0; i--)
-    {
-        QString file = list.at(i);
-        QStringList name = file.split(".");
-        if (name[0] == QString::number(n))
-        {
-            return QString::number(n) + "." + name[1];
-        }
-    }
-    return QString("31.English");
-}
-
-QString findLocaleS(QString string, QString dir)
-{
-    QDir langDir(dir + "/language");
-    QStringList list = langDir.entryList(QStringList("*.qm"), QDir::Files, QDir::Name);
-    for (int i = list.length() - 1; i >= 0; i--)
-    {
-        QString file = list.at(i);
-        QStringList name = file.split(".");
-        if (name[1] == string)
-        {
-            return name[0] + "." + string;
-        }
-    }
-    return QString("31.English");
-}
+// QM_FILE_INSTALL_DIR should be defined from the CMakeLists file.
+#ifndef QM_FILE_INSTALL_DIR
+#define QM_FILE_INSTALL_DIR ":/i18n/"
+#endif // QM_FILE_INSTALL_DIR
 
 int main(int argc, char *argv[])
 {
@@ -71,19 +46,25 @@ int main(int argc, char *argv[])
 
     a.addLibraryPath(a.applicationDirPath() + "/lib/");
 
-    int loc = QLocale::system().language();
-    QString locale = settings.value("Preferences/lang").value<QString>();
+    QString locale = settings.value("Preferences/language").value<QString>();
+
+    QString qmDir;
+#ifdef _WIN32
+    qmDir = QDir(QCoreApplication::applicationDirPath()).absoluteFilePath("translations");
+#else
+    qmDir = QT_STRINGIFY(QM_FILE_INSTALL_DIR);
+#endif
+
     QTranslator translator;
-    if(locale.isEmpty())
-    {
-        translator.load(a.applicationDirPath() + "/language/" + findLocaleN(loc, a.applicationDirPath()));
+    if(locale.isEmpty()) {
+        if (translator.load(QString("caesium_%1").arg(QLocale::system().name()), qmDir)) {
             a.installTranslator(&translator);
         }
-    else
-    {
-        translator.load(a.applicationDirPath() + "/language/" + findLocaleS(locale, a.applicationDirPath()));
+    } else {
+        if (translator.load(QString("caesium_%1").arg(locale), qmDir)) {
             a.installTranslator(&translator);
         }
+    }
 
     QPixmap pixmap(":icons/splash.png");
     QSplashScreen splash(pixmap, Qt::WindowStaysOnTopHint);

preferences.cpp

@@ -1,6 +1,7 @@
 /*******************************************************************************
 #
 # Copyright (C) 2010-2013 Matteo Paonessa <matteo.paonessa@gmail.com>
+#               2021      Gary Wang       <wzc782970009@gmail.com>
 #
 # This file is part of the Caesium distribution.
 #
@@ -19,6 +20,7 @@
 # Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
 #
 # Author: Matteo Paonessa <matteo.paonessa@gmail.com>
+#         Gary Wang       <wzc782970009@gmail.com>
 #
 # ******************************************************************************/
 
@@ -62,16 +64,17 @@ Preferences::~Preferences()
 
 void Preferences::loadLanguages()
 {
-    QDir langDir(QDir::currentPath() + "/language");
+    QDir langDir(QDir::currentPath() + "/translations");
     QStringList list = langDir.entryList(QStringList("*.qm"), QDir::Files, QDir::NoSort);
     for (int i = list.length() - 1; i >= 0; i--)
     {
-        QString file = list.at(i);
-        QStringList infoList;
-        QStringList name = file.split(".");
-        infoList << name[1];
-        QTreeWidgetItem *item = new QTreeWidgetItem(infoList, 0);
-        item->setIcon(0, QIcon(":/icons/language/" + name[1] + ".png"));
+        QString fileName = QFileInfo(list.at(i)).baseName();
+        if (!fileName.startsWith("caesium")) continue;
+        QString langCode = fileName.mid(8);
+        QString langName = QLocale(langCode).nativeLanguageName();
+        if (langName.isEmpty() || langCode.isEmpty()) continue;
+
+        QTreeWidgetItem *item = new QTreeWidgetItem({langName, langCode}, 0);
         ui->languageTreeWidget->insertTopLevelItem(0, item);
     }
     ui->languageTreeWidget->sortItems(0, Qt::AscendingOrder);
@@ -171,7 +174,7 @@ void Preferences::on_applyButton_clicked()
     settings.setValue("Preferences/loadlastlist", ui->loadLastListCheckBox->isChecked());
     if (ui->languageTreeWidget->selectedItems().count() != 0)
     {
-        settings.setValue("Preferences/lang", ui->languageTreeWidget->selectedItems().at(0)->text(0));
+        settings.setValue("Preferences/language", ui->languageTreeWidget->selectedItems().at(0)->text(1));
         QMessageBox::information(this,
                                  tr("Information"),
                                  tr("You need to restart the application before\nchanges take effect"),