Handle ctrl + shift + left click on links in PDF.

pdf/pdf_engine.h

 // Copyright (c) 2012 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 PDF_PDF_ENGINE_H_
 #define PDF_PDF_ENGINE_H_
 
 #include <stdint.h>
 
 #include "build/build_config.h"
@@ skipping 43 matching lines @@
   enum DocumentPermission {
     PERMISSION_COPY,
     PERMISSION_COPY_ACCESSIBLE,
     PERMISSION_PRINT_LOW_QUALITY,
     PERMISSION_PRINT_HIGH_QUALITY,
   };
 
   // The interface that's provided to the rendering engine.
   class Client {
    public:
+    // JavaScript counterpart of the enum is in navigator.js
+    // and they need to stay in sync.
+    enum class NavigateOption {
+      OPEN_IN_CURRENT_TAB = 0,
+      OPEN_IN_NEW_BACKGROUND_TAB,
+      OPEN_IN_NEW_FOREGROUND_TAB,
+      OPEN_IN_NEW_WINDOW,
+    };
+
     virtual ~Client() {}
 
     // Informs the client about the document's size in pixels.
     virtual void DocumentSizeUpdated(const pp::Size& size) = 0;
 
     // Informs the client that the given rect needs to be repainted.
     virtual void Invalidate(const pp::Rect& rect) = 0;
 
     // Informs the client to scroll the plugin area by the given offset.
     virtual void Scroll(const pp::Point& point) = 0;
 
     // Scroll the horizontal/vertical scrollbars to a given position.
     virtual void ScrollToX(int position) = 0;
     virtual void ScrollToY(int position) = 0;
 
     // Scroll to the specified page.
     virtual void ScrollToPage(int page) = 0;
 
     // Navigate to the given url.
-    virtual void NavigateTo(const std::string& url, bool open_in_new_tab) = 0;
+    virtual void NavigateTo(const std::string& url, NavigateOption option) = 0;
 
     // Updates the cursor.
     virtual void UpdateCursor(PP_CursorType_Dev cursor) = 0;
 
     // Updates the tick marks in the vertical scrollbar.
     virtual void UpdateTickMarks(const std::vector<pp::Rect>& tickmarks) = 0;
 
     // Updates the number of find results for the current search term.  If
     // there are no matches 0 should be passed in.  Only when the plugin has
     // finished searching should it pass in the final count with final_result
@@ skipping 256 matching lines @@
 
   // See the definition of GetPDFPageSizeByIndex in pdf.cc for details.
   virtual bool GetPDFPageSizeByIndex(const void* pdf_buffer,
                                      int pdf_buffer_size, int page_number,
                                      double* width, double* height) = 0;
 };
 
 }  // namespace chrome_pdf
 
 #endif  // PDF_PDF_ENGINE_H_