Add functions to collect bookmarks from Pdfium

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 "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include <string>
 #include <vector>
 
 #include "base/strings/string16.h"
 
 #include "ppapi/c/dev/pp_cursor_type_dev.h"
 #include "ppapi/c/dev/ppp_printing_dev.h"
 #include "ppapi/c/ppb_input_event.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/image_data.h"
 #include "ppapi/cpp/rect.h"
 #include "ppapi/cpp/size.h"
 #include "ppapi/cpp/url_loader.h"
+#include "ppapi/cpp/var_array.h"
 
 namespace pp {
 class InputEvent;
 }
 
 const uint32 kBackgroundColor = 0xFFCCCCCC;
 
 namespace chrome_pdf {
 
 class Stream;
@@ skipping 202 matching lines @@
   // Callback for timer that's set with ScheduleCallback().
   virtual void OnCallback(int id) = 0;
   // Gets the JSON representation of the PDF file
   virtual std::string GetPageAsJSON(int index) = 0;
   // Gets the PDF document's print scaling preference. True if the document can
   // be scaled to fit.
   virtual bool GetPrintScaling() = 0;
   // Returns number of copies to be printed.
   virtual int GetCopiesToPrint() = 0;
 
+  // Returns a VarArray of Bookmarks, each a VarDictionary containing the
+  // following key/values:
+  // - "title" - a string Var.
+  // - "page" - an int Var.
+  // - "children" - a VarArray(), with each entry containing a VarDictionary of
+  //   the same structure.
+  virtual pp::VarArray GetBookmarks() = 0;
+
   // Append blank pages to make a 1-page document to a |num_pages| document.
   // Always retain the first page data.
   virtual void AppendBlankPages(int num_pages) = 0;
   // Append the first page of the document loaded with the |engine| to this
   // document at page |index|.
   virtual void AppendPage(PDFEngine* engine, int index) = 0;
 
   // Allow client to query and reset scroll positions in document coordinates.
   // Note that this is meant for cases where the device scale factor changes,
   // and not for general scrolling - the engine will not repaint due to this.
@@ skipping 55 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_