PDFViewer: Accept file drops

Author: https://github.com/krkk
Commit: https://github.com/SerenityOS/serenity/commit/40d732a73c
Pull-request: https://github.com/SerenityOS/serenity/pull/20834

Userland/Applications/PDFViewer/PDFViewerWidget.cpp

@@ -423,3 +423,32 @@ PDF::PDFErrorOr<void> PDFViewerWidget::try_open_file(StringView path, NonnullOwn
 
     return {};
 }
+
+void PDFViewerWidget::drag_enter_event(GUI::DragEvent& event)
+{
+    auto const& mime_types = event.mime_types();
+    if (mime_types.contains_slow("text/uri-list"sv))
+        event.accept();
+}
+
+void PDFViewerWidget::drop_event(GUI::DropEvent& event)
+{
+    event.accept();
+    window()->move_to_front();
+
+    if (event.mime_data().has_urls()) {
+        auto urls = event.mime_data().urls();
+        if (urls.is_empty())
+            return;
+        if (urls.size() > 1) {
+            GUI::MessageBox::show(window(), "PDF Viewer can only open one file at a time!"sv, "One at a time please!"sv, GUI::MessageBox::Type::Error);
+            return;
+        }
+
+        auto response = FileSystemAccessClient::Client::the().request_file_read_only_approved(window(), urls.first().serialize_path());
+        if (response.is_error())
+            return;
+        if (auto result = try_open_file(response.value().filename(), response.value().release_stream()); result.is_error())
+            GUI::MessageBox::show(window(), "Unable to open file.\n"sv, "Error"sv, GUI::MessageBox::Type::Error);
+    }
+}

Userland/Applications/PDFViewer/PDFViewerWidget.h

@@ -30,6 +30,8 @@ public:
 
 private:
     PDFViewerWidget();
+    virtual void drag_enter_event(GUI::DragEvent&) override;
+    virtual void drop_event(GUI::DropEvent&) override;
 
     void initialize_toolbar(GUI::Toolbar&);
     PDF::PDFErrorOr<void> try_open_file(StringView path, NonnullOwnPtr<Core::File> file);