PrintPreview: Hide/Show the header footer option based on print frame margins.

chrome/browser/ui/webui/print_preview/print_preview_ui.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 CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_
 #pragma once
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/time.h"
 #include "chrome/browser/printing/print_preview_data_service.h"
 #include "chrome/browser/ui/webui/constrained_html_ui.h"
 
 class PrintPreviewDataService;
 class PrintPreviewHandler;
 struct PrintHostMsg_DidGetPreviewPageCount_Params;
 
+namespace gfx {
+class Rect;
+}
+
 namespace printing {
 struct PageSizeMargins;
 }
 
 class PrintPreviewUI : public ConstrainedHtmlUI {
  public:
   explicit PrintPreviewUI(content::WebUI* web_ui);
   virtual ~PrintPreviewUI();
 
   // Gets the print preview |data|. |index| is zero-based, and can be
@@ skipping 42 matching lines @@
   void OnShowSystemDialog();
 
   // Notifies the Web UI about the page count of the request preview.
   void OnDidGetPreviewPageCount(
       const PrintHostMsg_DidGetPreviewPageCount_Params& params);
 
   // Notifies the Web UI of the default page layout according to the currently
   // selected printer and page size.
   void OnDidGetDefaultPageLayout(
       const printing::PageSizeMargins& page_layout,
+      const gfx::Rect& printable_area,
       bool has_custom_page_size_style);
 
   // Notifies the Web UI that the 0-based page |page_number| has been rendered.
   // |preview_request_id| indicates wich request resulted in this response.
   void OnDidPreviewPage(int page_number, int preview_request_id);
 
   // Notifies the Web UI renderer that preview data is available.
   // |expected_pages_count| specifies the total number of pages.
   // |preview_request_id| indicates which request resulted in this response.
   void OnPreviewDataIsAvailable(int expected_pages_count,
@@ skipping 75 matching lines @@
   // Keeps track of whether OnClosePrintPreviewTab() has been called or not.
   bool tab_closed_;
 
   // True if the user visited the page directly, false if it's a live UI.
   bool is_dummy_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_