Add private PPAPI interfaces for PDFium accessibility.

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 215 matching lines @@
   virtual bool HasPermission(DocumentPermission permission) const = 0;
   virtual void SelectAll() = 0;
   // Gets the number of pages in the document.
   virtual int GetNumberOfPages() = 0;
   // Gets the 0-based page number of |destination|, or -1 if it does not exist.
   virtual int GetNamedDestinationPage(const std::string& destination) = 0;
   // Gets the index of the most visible page, or -1 if none are visible.
   virtual int GetMostVisiblePage() = 0;
   // Gets the rectangle of the page including shadow.
   virtual pp::Rect GetPageRect(int index) = 0;
+  // Gets the rectangle of the page not including the shadow.
+  virtual pp::Rect GetPageBoundsRect(int index) = 0;
   // Gets the rectangle of the page excluding any additional areas.
   virtual pp::Rect GetPageContentsRect(int index) = 0;
   // Returns a page's rect in screen coordinates, as well as its surrounding
   // border areas and bottom separator.
   virtual pp::Rect GetPageScreenRect(int page_index) const = 0;
   // Gets the offset of the vertical scrollbar from the top in document
   // coordinates.
   virtual int GetVerticalScrollbarYPosition() = 0;
   // Set color / grayscale rendering modes.
   virtual void SetGrayscale(bool grayscale) = 0;
   // 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;
+  // Get the number of characters on a given page.
+  virtual int GetCharCount(int page_index) = 0;
+  // Get the width in pixels of a character on a given page.
+  virtual double GetCharWidth(int page_index, int char_index) = 0;
+  // Get a given unicode character on a given page.
+  virtual uint32_t GetCharUnicode(int page_index, int char_index) = 0;
+  // 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.
+  virtual void GetTextRunInfo(int page_index,
+                              int start_char_index,
+                              uint32_t* out_len,
+                              double* out_font_size,
+                              pp::FloatRect* out_bounds) = 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 the duplex setting.
   virtual int GetDuplexType() = 0;
   // Returns true if all the pages are the same size.
   virtual bool GetPageSizeAndUniformity(pp::Size* size) = 0;
 
@@ skipping 76 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_