Delegates for the printing component

chrome/renderer/printing/chrome_print_web_view_helper_delegate.h

+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_RENDERER_PRINTING_CHROME_PRINT_WEB_VIEW_HELPER_DELEGATE_H_
+#define CHROME_RENDERER_PRINTING_CHROME_PRINT_WEB_VIEW_HELPER_DELEGATE_H_
+
+#include "chrome/renderer/printing/print_web_view_helper_delegate.h"
+
+// Could be owned by the helper or the client, or could be a specialized
+ // implementation of the helper
+
+namespace printing {
+
+class ChromePrintWebViewHelperDelegate : public PrintWebViewHelperDelegate {
+ public:
+  ChromePrintWebViewHelperDelegate();
+  ~ChromePrintWebViewHelperDelegate() override;
+
+  virtual bool OutOfProcessPdfEnabled() override;
+
+  // Returns the element to be printed. Returns a new WebElement if
+  // a pdf plugin element can't be extracted from the frame.
+  virtual blink::WebElement GetPdfElement(blink::WebLocalFrame* frame) override;
+
+  // Returns the preview page
+  virtual base::StringValue GetPrintPreviewHtml() override;
+
+  // Returns whether print preview should be disabled
+  virtual bool PrintPreviewDisabled() override;
+
+  // If a scripted print needs to be cancelled, returns a message to be sent
+  // before cancelling print. Else returns |nullptr|.
+  virtual IPC::Message* GetScriptedPrintCancelMessage(
+      content::RenderView* render_view,
+      int routing_id) override;
+};  // class ChromePrintWebViewHelperDelegate
+
+}  // namespace printing
+
+#endif  // CHROME_RENDERER_PRINTING_CHROME_PRINT_WEB_VIEW_HELPER_DELEGATE_H_