Split printing code from PDFiumEngine into PDFiumPrint.

Change-Id: I431828148e9f93eadd290493e848331f996cbd69
Reviewed-on: https://chromium-review.googlesource.com/1043657Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556147}

pdf/BUILD.gn

@@ -92,6 +92,8 @@ if (enable_pdf) {
         "pdfium/pdfium_mem_buffer_file_write.h",
         "pdfium/pdfium_page.cc",
         "pdfium/pdfium_page.h",
+        "pdfium/pdfium_print.cc",
+        "pdfium/pdfium_print.h",
         "pdfium/pdfium_range.cc",
         "pdfium/pdfium_range.h",
       ]

pdf/pdfium/pdfium_engine.h

@@ -11,7 +11,6 @@
 #include <map>
 #include <memory>
 #include <string>
-#include <utility>
 #include <vector>
 
 #include "base/macros.h"
@@ -21,6 +20,7 @@
 #include "pdf/pdf_engine.h"
 #include "pdf/pdfium/pdfium_form_filler.h"
 #include "pdf/pdfium/pdfium_page.h"
+#include "pdf/pdfium/pdfium_print.h"
 #include "pdf/pdfium/pdfium_range.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/dev/buffer_dev.h"
@@ -316,12 +316,6 @@ class PDFiumEngine : public PDFEngine,
 
   bool ExtendSelection(int page_index, int char_index);
 
-  FPDF_DOCUMENT CreateSinglePageRasterPdf(
-      double source_page_width,
-      double source_page_height,
-      const PP_PrintSettings_Dev& print_settings,
-      PDFiumPage* page_to_print);
-
   pp::Buffer_Dev PrintPagesAsRasterPDF(
       const PP_PrintPageNumberRange_Dev* page_ranges,
       uint32_t page_range_count,
@@ -331,20 +325,6 @@ class PDFiumEngine : public PDFEngine,
                                  uint32_t page_range_count,
                                  const PP_PrintSettings_Dev& print_settings);
 
-  bool FlattenPrintData(FPDF_DOCUMENT doc);
-  pp::Buffer_Dev GetPrintData(FPDF_DOCUMENT doc);
-  pp::Buffer_Dev GetFlattenedPrintData(FPDF_DOCUMENT doc);
-
-  // Perform N-up PDF generation from |doc| based on the parameters in
-  // |print_settings|. On success, the returned buffer contains the N-up version
-  // of |doc|. On failure, the returned buffer is empty.
-  pp::Buffer_Dev NupPdfToPdf(FPDF_DOCUMENT doc,
-                             const PP_PrintSettings_Dev& print_settings);
-
-  void FitContentsToPrintableAreaIfRequired(
-      FPDF_DOCUMENT doc,
-      const PP_PrintSettings_Dev& print_settings);
-
   // Checks if |page| has selected text in a form element. If so, sets that as
   // the plugin's text selection.
   void SetFormSelectedText(FPDF_FORMHANDLE form_handle, FPDF_PAGE page);
@@ -447,10 +427,6 @@ class PDFiumEngine : public PDFEngine,
   // triggers as necessary.
   void SetCurrentPage(int index);
 
-  // Transform |page| contents to fit in the selected printer paper size.
-  void TransformPDFPageForPrinting(FPDF_PAGE page,
-                                   const PP_PrintSettings_Dev& print_settings);
-
   void DrawPageShadow(const pp::Rect& page_rect,
                       const pp::Rect& shadow_rect,
                       const pp::Rect& clip_rect,
@@ -695,6 +671,7 @@ class PDFiumEngine : public PDFEngine,
   bool edit_mode_;
 
   PDFiumFormFiller form_filler_;
+  PDFiumPrint print_;
 
   DISALLOW_COPY_AND_ASSIGN(PDFiumEngine);
 };

pdf/pdfium/pdfium_print.h

+// Copyright 2018 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_PRINT_H_
+#define PDF_PDFIUM_PDFIUM_PRINT_H_
+
+#include <vector>
+
+#include "base/macros.h"
+#include "ppapi/cpp/dev/buffer_dev.h"
+#include "third_party/pdfium/public/fpdfview.h"
+
+struct PP_PrintSettings_Dev;
+struct PP_PrintPageNumberRange_Dev;
+
+namespace chrome_pdf {
+
+class PDFiumEngine;
+class PDFiumPage;
+
+class PDFiumPrint {
+ public:
+  explicit PDFiumPrint(PDFiumEngine* engine);
+  ~PDFiumPrint();
+
+  static std::vector<uint32_t> GetPageNumbersFromPrintPageNumberRange(
+      const PP_PrintPageNumberRange_Dev* page_ranges,
+      uint32_t page_range_count);
+
+  pp::Buffer_Dev PrintPagesAsRasterPDF(
+      const PP_PrintPageNumberRange_Dev* page_ranges,
+      uint32_t page_range_count,
+      const PP_PrintSettings_Dev& print_settings);
+  pp::Buffer_Dev PrintPagesAsPDF(const PP_PrintPageNumberRange_Dev* page_ranges,
+                                 uint32_t page_range_count,
+                                 const PP_PrintSettings_Dev& print_settings);
+
+ private:
+  FPDF_DOCUMENT CreateSinglePageRasterPdf(
+      double source_page_width,
+      double source_page_height,
+      const PP_PrintSettings_Dev& print_settings,
+      PDFiumPage* page_to_print);
+
+  // Perform N-up PDF generation from |doc| based on the parameters in
+  // |print_settings|. On success, the returned buffer contains the N-up version
+  // of |doc|. On failure, the returned buffer is empty.
+  pp::Buffer_Dev NupPdfToPdf(FPDF_DOCUMENT doc,
+                             const PP_PrintSettings_Dev& print_settings);
+
+  bool FlattenPrintData(FPDF_DOCUMENT doc);
+  pp::Buffer_Dev GetPrintData(FPDF_DOCUMENT doc);
+  pp::Buffer_Dev GetFlattenedPrintData(FPDF_DOCUMENT doc);
+
+  PDFiumEngine* const engine_;
+
+  DISALLOW_COPY_AND_ASSIGN(PDFiumPrint);
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_PDFIUM_PDFIUM_PRINT_H_