Add private PPAPI interfaces for PDFium accessibility.

pdf/pdfium/pdfium_page.h

 // Copyright (c) 2010 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_PDFIUM_PDFIUM_PAGE_H_
 #define PDF_PDFIUM_PDFIUM_PAGE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 28 matching lines @@
   FPDF_PAGE GetPrintPage();
   // Close the printing page.
   void ClosePrintPage();
 
   // Returns FPDF_TEXTPAGE for the page, loading and parsing it if necessary.
   FPDF_TEXTPAGE GetTextPage();
 
   // Returns a DictionaryValue version of the page.
   base::Value* GetAccessibleContentAsValue(int rotation);
 
+  // Given a start char index, find the longest continuous run of text that's
+  // in a single direction and with the same style and font size. Return the
+  // length of that sequence and its font size and bounding box.
+  void GetTextRunInfo(int start_char_index,
+                      uint32_t* out_len,
+                      double* out_font_size,
+                      pp::FloatRect* out_bounds);
+  // Get a unicode character from the page.
+  uint32_t GetCharUnicode(int char_index);
+  // Get the width of a character in page pixels.
+  double GetCharWidth(int char_index);
+
   enum Area {
     NONSELECTABLE_AREA,
     TEXT_AREA,
     WEBLINK_AREA,  // Area is a hyperlink.
     DOCLINK_AREA,  // Area is a link to a different part of the same document.
   };
 
   struct LinkTarget {
     // We are using std::string here which have a copy contructor.
     // That prevents us from using union here.
@@ skipping 73 matching lines @@
   int loading_count_;
   pp::Rect rect_;
   bool calculated_links_;
   std::vector<Link> links_;
   bool available_;
 };
 
 }  // namespace chrome_pdf
 
 #endif  // PDF_PDFIUM_PDFIUM_PAGE_H_