Handle long press in PDF documents.

pdf/pdfium/pdfium_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_PDFIUM_PDFIUM_ENGINE_H_
 #define PDF_PDFIUM_PDFIUM_ENGINE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/optional.h"
 #include "base/time/time.h"
 #include "pdf/document_loader.h"
 #include "pdf/pdf_engine.h"
 #include "pdf/pdfium/pdfium_page.h"
 #include "pdf/pdfium/pdfium_range.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/dev/buffer_dev.h"
 #include "ppapi/cpp/image_data.h"
+#include "ppapi/cpp/input_event.h"
 #include "ppapi/cpp/point.h"
 #include "ppapi/cpp/var_array.h"
 #include "third_party/pdfium/public/fpdf_dataavail.h"
 #include "third_party/pdfium/public/fpdf_formfill.h"
 #include "third_party/pdfium/public/fpdf_progressive.h"
 #include "third_party/pdfium/public/fpdfview.h"
 
-namespace pp {
-class KeyboardInputEvent;
-class MouseInputEvent;
-}
-
 namespace chrome_pdf {
 
 class ShadowMatrix;
 
 class PDFiumEngine : public PDFEngine,
                      public DocumentLoader::Client,
                      public FPDF_FORMFILLINFO,
                      public IPDF_JSPLATFORM,
                      public IFSDK_PAUSE {
  public:
@@ skipping 34 matching lines @@
   pp::VarArray GetBookmarks() override;
   int GetNamedDestinationPage(const std::string& destination) override;
   int GetMostVisiblePage() override;
   pp::Rect GetPageRect(int index) override;
   pp::Rect GetPageBoundsRect(int index) override;
   pp::Rect GetPageContentsRect(int index) override;
   pp::Rect GetPageScreenRect(int page_index) const override;
   int GetVerticalScrollbarYPosition() override;
   void SetGrayscale(bool grayscale) override;
   void OnCallback(int id) override;
+  void OnTouchTimerCallback(int id) override;
   int GetCharCount(int page_index) override;
   pp::FloatRect GetCharBounds(int page_index, int char_index) override;
   uint32_t GetCharUnicode(int page_index, int char_index) override;
   void GetTextRunInfo(int page_index,
                       int start_char_index,
                       uint32_t* out_len,
                       double* out_font_size,
                       pp::FloatRect* out_bounds) override;
   bool GetPrintScaling() override;
   int GetCopiesToPrint() override;
@@ skipping 331 matching lines @@
   void OnSelectionChanged();
 
   // Common code shared by RotateClockwise() and RotateCounterclockwise().
   void RotateInternal();
 
   // Setting selection status of document.
   void SetSelecting(bool selecting);
 
   bool PageIndexInBounds(int index) const;
 
+  void ScheduleTouchTimer(const pp::TouchInputEvent& event);
+  void KillTouchTimer(int timer_id);
+  void HandleLongPress(const pp::TouchInputEvent& event);
+
   // FPDF_FORMFILLINFO callbacks.
   static void Form_Invalidate(FPDF_FORMFILLINFO* param,
                               FPDF_PAGE page,
                               double left,
                               double top,
                               double right,
                               double bottom);
   static void Form_OutputSelectedRect(FPDF_FORMFILLINFO* param,
                                       FPDF_PAGE page,
                                       double left,
@@ skipping 213 matching lines @@
   FileAvail file_availability_;
   // Interface structure to request data chunks from the document stream.
   DownloadHints download_hints_;
   // Pointer to the document availability interface.
   FPDF_AVAIL fpdf_availability_;
 
   pp::Size default_page_size_;
 
   // Used to manage timers that form fill API needs.  The pair holds the timer
   // period, in ms, and the callback function.
-  std::map<int, std::pair<int, TimerCallback> > timers_;
-  int next_timer_id_;
+  std::map<int, std::pair<int, TimerCallback>> formfill_timers_;
+  int next_formfill_timer_id_;
+
+  // Used to manage timers for touch long press.
+  std::map<int, pp::TouchInputEvent> touch_timers_;
+  int next_touch_timer_id_;

[Lei Zhang, 2017/05/03 01:52:53]

This isn't initialized?

[dsinclair, 2017/05/03 14:18:41]

Done.

 
   // Holds the zero-based page index of the last page that the mouse clicked on.
   int last_page_mouse_down_;
 
   // Holds the zero-based page index of the most visible page; refreshed by
   // calling CalculateVisiblePages()
   int most_visible_page_;
 
   // Holds the page index requested by PDFium while the scroll operation
   // is being handled (asynchronously).
@@ skipping 100 matching lines @@
   bool GetPDFPageSizeByIndex(const void* pdf_buffer,
                              int pdf_buffer_size,
                              int page_number,
                              double* width,
                              double* height) override;
 };
 
 }  // namespace chrome_pdf
 
 #endif  // PDF_PDFIUM_PDFIUM_ENGINE_H_