drag and drop

src/mainwindow.cc

@@ -1,8 +1,11 @@
 #include "mainwindow.h"
 #include <QDesktopServices>
+#include <QDragEnterEvent>
+#include <QDropEvent>
 #include <QFileDialog>
 #include <QInputDialog>
 #include <QMessageBox>
+#include <QMimeData>
 #include <QTemporaryDir>
 #include <botan/auto_rng.h>
 #include <botan/hex.h>
@@ -11,6 +14,8 @@ MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent), ui(std::make_unique<Ui::MainWindow>()) {
   ui->setupUi(this);
 
+  setAcceptDrops(true);
+
   ui->filePreview->setVisible(false);
 
   connect(ui->actionNew, &QAction::triggered, this, [this]() {
@@ -201,3 +206,43 @@ void MainWindow::file_context_menu(const QPoint &pos) {
 
   menu.exec(ui->fsTreeWidget->mapToGlobal(pos));
 }
+
+void MainWindow::dragEnterEvent(QDragEnterEvent *event) {
+  if (event->mimeData()->hasUrls()) {
+    const auto urls = event->mimeData()->urls();
+    for (const QUrl &u : urls) {
+      if (u.isLocalFile()) {
+        event->acceptProposedAction();
+        return;
+      }
+    }
+  }
+  event->ignore();
+}
+
+void MainWindow::dropEvent(QDropEvent *event) {
+  if (!event->mimeData()->hasUrls()) {
+    event->ignore();
+    return;
+  }
+  if (!m_vault) {
+    return;
+  }
+
+  for (const QUrl &u : event->mimeData()->urls()) {
+    if (!u.isLocalFile()) {
+      continue;
+    }
+    std::ifstream file(u.toLocalFile().toStdString(), std::ios::binary);
+    ASSERT(file.good());
+
+    std::string content((std::istreambuf_iterator<char>(file)),
+                        std::istreambuf_iterator<char>());
+
+    m_vault->create_file(path_to_filename(u.toLocalFile().toStdString()),
+                         content);
+  }
+  reload_fs_tree();
+
+  event->acceptProposedAction();
+}

src/mainwindow.h

@@ -11,6 +11,10 @@ class MainWindow : public QMainWindow {
 public:
   explicit MainWindow(QWidget *parent = nullptr);
 
+protected:
+  void dragEnterEvent(QDragEnterEvent *event) override;
+  void dropEvent(QDropEvent *event) override;
+
 private:
   std::unique_ptr<Ui::MainWindow> ui;