From a6e31a2c4db5dfa4686c6e77e0e5e50a545282f3 Mon Sep 17 00:00:00 2001
From: Gary Wang <git@blumia.net>
Date: Sun, 28 Jul 2024 16:16:20 +0800
Subject: [PATCH] feat: cli argument to list supported image formats

---
 app/main.cpp       |  9 ++++++++-
 app/mainwindow.cpp | 20 ++++++++++++++------
 app/mainwindow.h   |  2 ++
 3 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/app/main.cpp b/app/main.cpp
index 5fcd4dd..05c03b2 100644
--- a/app/main.cpp
+++ b/app/main.cpp
@@ -40,13 +40,20 @@ int main(int argc, char *argv[])
     a.setApplicationName("Pineapple Pictures");
     a.setApplicationDisplayName(QCoreApplication::translate("main", "Pineapple Pictures"));
 
+    // commandline options
+    QCommandLineOption supportedImageFormats(QStringLiteral("supported-image-formats"), QCoreApplication::translate("main", "List supported image format suffixes, and quit program."));
     // parse commandline arguments
     QCommandLineParser parser;
+    parser.addOption(supportedImageFormats);
     parser.addPositionalArgument("File list", QCoreApplication::translate("main", "File list."));
     parser.addHelpOption();
-
     parser.process(a);
 
+    if (parser.isSet(supportedImageFormats)) {
+        fputs(qPrintable(MainWindow::supportedImageFormats().join(QChar('\n'))), stdout);
+        ::exit(EXIT_SUCCESS);
+    }
+
     MainWindow w;
     w.show();
 
diff --git a/app/mainwindow.cpp b/app/mainwindow.cpp
index 80ac900..363d5b6 100644
--- a/app/mainwindow.cpp
+++ b/app/mainwindow.cpp
@@ -57,12 +57,7 @@ MainWindow::MainWindow(QWidget *parent)
     this->setWindowIcon(QIcon(":/icons/app-icon.svg"));
     this->setMouseTracking(true);
 
-    // related to jfif: https://codereview.qt-project.org/c/qt/qtbase/+/577730
-    QStringList formatFilters{ QStringLiteral("*.jfif") };
-    for (const QByteArray &item : QImageReader::supportedImageFormats()) {
-        formatFilters.append(QStringLiteral("*.") % QString::fromLocal8Bit(item));
-    }
-    m_pm->setAutoLoadFilterSuffixes(formatFilters);
+    m_pm->setAutoLoadFilterSuffixes(supportedImageFormats());
 
     m_fadeOutAnimation = new QPropertyAnimation(this, "windowOpacity");
     m_fadeOutAnimation->setDuration(300);
@@ -278,6 +273,19 @@ void MainWindow::galleryCurrent()
     }
 }
 
+QStringList MainWindow::supportedImageFormats()
+{
+    QStringList formatFilters {
+#if QT_VERSION < QT_VERSION_CHECK(6, 8, 0)
+        QStringLiteral("*.jfif")
+#endif // QT_VERSION < QT_VERSION_CHECK(6, 8, 0)
+    };
+    for (const QByteArray &item : QImageReader::supportedImageFormats()) {
+        formatFilters.append(QStringLiteral("*.") % QString::fromLocal8Bit(item));
+    }
+    return formatFilters;
+}
+
 void MainWindow::showEvent(QShowEvent *event)
 {
     updateWidgetsPosition();
diff --git a/app/mainwindow.h b/app/mainwindow.h
index 528f929..7a0c842 100644
--- a/app/mainwindow.h
+++ b/app/mainwindow.h
@@ -47,6 +47,8 @@ public:
     void galleryNext();
     void galleryCurrent();
 
+    static QStringList supportedImageFormats();
+
 protected slots:
     void showEvent(QShowEvent *event) override;
     void enterEvent(QT_ENTER_EVENT *event) override;