1 files changed, 64 insertions, 0 deletions
diff --git a/src/core/extensions/plugin_service_filter_qt.cpp b/src/core/extensions/plugin_service_filter_qt.cpp
new file mode 100644
index 000000000..1f6c606bc
--- /dev/null
+++ b/src/core/extensions/plugin_service_filter_qt.cpp
@@ -0,0 +1,64 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include "extensions/plugin_service_filter_qt.h"
+
+#include "content/public/browser/render_process_host.h"
+
+#include "web_contents_delegate_qt.h"
+#include "web_engine_settings.h"
+
+using namespace QtWebEngineCore;
+
+namespace extensions {
+
+// static
+PluginServiceFilterQt *PluginServiceFilterQt::GetInstance()
+{
+    return base::Singleton<PluginServiceFilterQt>::get();
+}
+
+bool PluginServiceFilterQt::IsPluginAvailable(int render_process_id, int render_frame_id,
+                                              content::BrowserContext *browser_context,
+                                              const content::WebPluginInfo &plugin)
+{
+    Q_UNUSED(plugin);
+    Q_UNUSED(browser_context);
+    content::RenderFrameHost *frame_host = content::RenderFrameHost::FromID(render_process_id, render_frame_id);
+    content::WebContents *web_contents = content::WebContents::FromRenderFrameHost(frame_host);
+    if (!web_contents) {
+        // Availability checked somewhere before/during WebContents initialization. Let it load and enable
+        // all the plugins at this phase. This information will be queried again when receiving the response
+        // for the requested content. Postponing our decision and enabling/blocking there makes WebEngineSettings
+        // modifiable in runtime without reconstructing WebContents.
+        return true;
+    }
+
+    if (web_contents->IsInnerWebContentsForGuest())
+        web_contents = web_contents->GetOuterWebContents();
+
+    if (auto *delegate = static_cast<WebContentsDelegateQt *>(web_contents->GetDelegate())) {
+        const WebEngineSettings *settings = delegate->webEngineSettings();
+        if (!settings->testAttribute(QWebEngineSettings::PdfViewerEnabled)
+            || !settings->testAttribute(QWebEngineSettings::PluginsEnabled))
+            return false;
+    }
+
+    return true;
+}
+
+bool PluginServiceFilterQt::CanLoadPlugin(int render_process_id,
+                                          const base::FilePath &path)
+{
+    return true;
+}
+
+PluginServiceFilterQt::PluginServiceFilterQt()
+{
+}
+
+PluginServiceFilterQt::~PluginServiceFilterQt()
+{
+}
+
+} // namespace extensions