Reland 103021: Printing preview of a PDF on Mac with Skia only previews the last page of the PDF

webkit/plugins/ppapi/ppapi_plugin_instance.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 WEBKIT_PLUGINS_PPAPI_PPAPI_PLUGIN_INSTANCE_H_
 #define WEBKIT_PLUGINS_PPAPI_PPAPI_PLUGIN_INSTANCE_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 448 matching lines @@
 
   // This is only valid between a successful PrintBegin call and a PrintEnd
   // call.
   PP_PrintSettings_Dev current_print_settings_;
 #if defined(OS_MACOSX)
   // On the Mac, when we draw the bitmap to the PDFContext, it seems necessary
   // to keep the pixels valid until CGContextEndPage is called. We use this
   // variable to hold on to the pixels.
   scoped_refptr<PPB_ImageData_Impl> last_printed_page_;
 #endif  // defined(OS_MACOSX)
-#if defined(OS_LINUX) || defined(OS_WIN)
-  // When printing to PDF (print preview, Linux) the entire document goes into
-  // one metafile.  However, when users print only a subset of all the pages,
-  // it is impossible to know if a call to PrintPage() is the last call.
-  // Thus in PrintPage(), just store the page number in |ranges_|.
-  // The hack is in PrintEnd(), where a valid |canvas_| is preserved in
-  // PrintWebViewHelper::PrintPages. This makes it possible to generate the
-  // entire PDF given the variables below:
+#if defined(USE_SKIA)
+  // Always when printing to PDF on Linux and when printing for preview on Mac
+  // and Win, the entire document goes into one metafile.  However, when users
+  // print only a subset of all the pages, it is impossible to know if a call
+  // to PrintPage() is the last call. Thus in PrintPage(), just store the page
+  // number in |ranges_|. The hack is in PrintEnd(), where a valid |canvas_|
+  // is preserved in PrintWebViewHelper::PrintPages. This makes it possible
+  // to generate the entire PDF given the variables below:
   //
   // The most recently used WebCanvas, guaranteed to be valid.
   SkRefPtr<WebKit::WebCanvas> canvas_;
   // An array of page ranges.
   std::vector<PP_PrintPageNumberRange_Dev> ranges_;
 #endif  // OS_LINUX || OS_WIN
 
   // The plugin print interface.
   const PPP_Printing_Dev* plugin_print_interface_;
 
@@ skipping 47 matching lines @@
 
   PP_CompletionCallback lock_mouse_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginInstance);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PPAPI_PLUGIN_INSTANCE_H_