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

chrome/renderer/print_web_view_helper.cc

 // Copyright (c) 2012 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/renderer/print_web_view_helper.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 16 matching lines @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebCanvas.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebConsoleMessage.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDataSource.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebElement.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebSize.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebURLRequest.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebURLResponse.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 #include "ui/base/l10n/l10n_util.h"

[vandebo (ex-Chrome), 2012/03/19 17:11:30]

#include "ui/gfx/rect.h"

[kmadhusu, 2012/03/19 18:45:31]

Done.

 #include "webkit/glue/webpreferences.h"
 
 #if defined(OS_POSIX)
 #include "base/process_util.h"
 #endif
 
 #if defined(USE_SKIA)
 #include "skia/ext/vector_canvas.h"
 #include "skia/ext/vector_platform_device_skia.h"
 #include "third_party/skia/include/core/SkTypeface.h"
@@ skipping 818 matching lines @@
   if (!print_preview_context_.CreatePreviewDocument(&print_params, pages,
                                                     ignore_css_margins_,
                                                     fit_to_page_)) {
     return false;
   }
 
   PageSizeMargins default_page_layout;
   ComputePageLayoutInPointsForCss(print_preview_context_.frame(), 0,
                                   print_params, ignore_css_margins_,
                                   fit_to_page_, NULL, &default_page_layout);
+
   if (!old_print_pages_params_.get() ||
       !PageLayoutIsEqual(*old_print_pages_params_, *print_pages_params_)) {
     bool has_page_size_style = PrintingFrameHasPageSizeStyle(
         print_preview_context_.frame(),
         print_preview_context_.total_page_count());
+    int dpi = GetDPI(&print_params);
+    gfx::Rect printable_area_in_points(
+      ConvertUnit(print_pages_params_->params.printable_area.x(),
+          dpi, printing::kPointsPerInch),
+      ConvertUnit(print_pages_params_->params.printable_area.y(),
+          dpi, printing::kPointsPerInch),
+      ConvertUnit(print_pages_params_->params.printable_area.width(),
+          dpi, printing::kPointsPerInch),
+      ConvertUnit(print_pages_params_->params.printable_area.height(),
+          dpi, printing::kPointsPerInch));
+
     // Margins: Send default page layout to browser process.
     Send(new PrintHostMsg_DidGetDefaultPageLayout(routing_id(),
                                                   default_page_layout,
+                                                  printable_area_in_points,
                                                   has_page_size_style));
   }
 
   PrintHostMsg_DidGetPreviewPageCount_Params params;
   params.page_count = print_preview_context_.total_page_count();
   params.is_modifiable = print_preview_context_.IsModifiable();
   params.document_cookie = print_pages_params_->params.document_cookie;
   params.preview_request_id = print_pages_params_->params.preview_request_id;
   params.clear_preview_data = print_preview_context_.generate_draft_pages();
   Send(new PrintHostMsg_DidGetPreviewPageCount(routing_id(), params));
@@ skipping 880 matching lines @@
   DCHECK(IsRendering());
   return prep_frame_view_->GetPrintCanvasSize();
 }
 
 void PrintWebViewHelper::PrintPreviewContext::ClearContext() {
   prep_frame_view_.reset();
   metafile_.reset();
   pages_to_render_.clear();
   error_ = PREVIEW_ERROR_NONE;
 }