PrintPreview: Implement GetMetafileForCurrentPage() function in PdfMetafileSkia.

printing/pdf_metafile_skia.h

 // Copyright (c) 2011 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 PRINTING_PDF_METAFILE_SKIA_H_
 #define PRINTING_PDF_METAFILE_SKIA_H_
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/scoped_ptr.h"
@@ skipping 52 matching lines @@
                           bool center_horizontally,
                           bool center_vertically) const;
 #endif
 
 #if defined(OS_CHROMEOS)
   virtual bool SaveToFD(const base::FileDescriptor& fd) const;
 #endif  // if defined(OS_CHROMEOS)
 
   virtual void set_draft(bool draft) const;
 
+  // Helper function to get the metafile for current page. This is called from

[vandebo (ex-Chrome), 2011/06/29 20:23:45]

We can probably give a better description of this method:
Return a new metafile containing just the current page in draft mode.

[kmadhusu, 2011/06/30 06:10:55]

Done.

+  // the preview workflow.
+  PdfMetafileSkia* GetMetafileForCurrentPage();
+
  private:
   scoped_ptr<PdfMetafileSkiaData> data_;
 
   // True when a draft version of metafile is requested.
   mutable bool draft_;
 
+  // True when finish page is already called for current page.
+  mutable bool did_finish_page_;

[vandebo (ex-Chrome), 2011/06/29 20:23:45]

Why do we have mutable fields?

[kmadhusu, 2011/06/30 06:10:55]

Removed.

+
   DISALLOW_COPY_AND_ASSIGN(PdfMetafileSkia);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PDF_METAFILE_SKIA_H_