Add generic text printing

chrome/utility/printing_handler.cc

 // Copyright 2014 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.
 
 #include "chrome/utility/printing_handler.h"
 
 #include <stdint.h>
 #include <utility>
 
 #include "base/files/file_util.h"
@@ skipping 73 matching lines @@
   return handled;
 }
 
 #if defined(OS_WIN)
 void PrintingHandler::OnRenderPDFPagesToMetafile(
     IPC::PlatformFileForTransit pdf_transit,
     const PdfRenderSettings& settings) {
   pdf_rendering_settings_ = settings;
   chrome_pdf::SetPDFUseGDIPrinting(pdf_rendering_settings_.mode ==
                                    PdfRenderSettings::Mode::GDI_TEXT);
+  chrome_pdf::SetPDFUseTextOnlyPrinting(pdf_rendering_settings_.mode ==
+                                        PdfRenderSettings::Mode::TEXTONLY);
   int postscript_level;
   switch (pdf_rendering_settings_.mode) {
     case PdfRenderSettings::Mode::POSTSCRIPT_LEVEL2:
       postscript_level = 2;
       break;
     case PdfRenderSettings::Mode::POSTSCRIPT_LEVEL3:
       postscript_level = 3;
       break;
     default:
       postscript_level = 0;  // Not using postscript.
   }
   chrome_pdf::SetPDFPostscriptPrintingLevel(postscript_level);
 
   base::File pdf_file = IPC::PlatformFileForTransitToFile(pdf_transit);
   int page_count = LoadPDF(std::move(pdf_file));
   Send(
       new ChromeUtilityHostMsg_RenderPDFPagesToMetafiles_PageCount(page_count));
 }
 
 void PrintingHandler::OnRenderPDFPagesToMetafileGetPage(
     int page_number,
     IPC::PlatformFileForTransit output_file) {
   base::File emf_file = IPC::PlatformFileForTransitToFile(output_file);
   float scale_factor = 1.0f;
-  bool postscript = pdf_rendering_settings_.mode ==
-                        PdfRenderSettings::Mode::POSTSCRIPT_LEVEL2 ||
-                    pdf_rendering_settings_.mode ==
-                        PdfRenderSettings::Mode::POSTSCRIPT_LEVEL3;
+  bool postscript =
+      pdf_rendering_settings_.mode ==
+          PdfRenderSettings::Mode::POSTSCRIPT_LEVEL2 ||
+      pdf_rendering_settings_.mode ==
+          PdfRenderSettings::Mode::POSTSCRIPT_LEVEL3 ||
+      pdf_rendering_settings_.mode == PdfRenderSettings::Mode::TEXTONLY;

[Lei Zhang, 2017/07/05 23:27:08]

TEXTONLY is postscript?

[rbpotter, 2017/07/06 01:31:17]

Did this initially to avoid scaling the DC, but then updated the
pdfium side to ignore the DC size entirely and forgot to remove it.

   bool success = RenderPdfPageToMetafile(page_number, std::move(emf_file),
                                          &scale_factor, postscript);
   Send(new ChromeUtilityHostMsg_RenderPDFPagesToMetafiles_PageDone(
       success, scale_factor));
 }
 
 void PrintingHandler::OnRenderPDFPagesToMetafileStop() {
   ReleaseProcessIfNeeded();
 }
 
@@ skipping 203 matching lines @@
         printer_name, printer_info));
   } else {
     Send(new ChromeUtilityHostMsg_GetPrinterSemanticCapsAndDefaults_Failed(
         printer_name));
   }
   ReleaseProcessIfNeeded();
 }
 #endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 }  // namespace printing