Added Header and Footer support using Skia

printing/print_job_constants.cc

 // 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.
 
 #include "printing/print_job_constants.h"
 
 namespace printing {
 
 // True if this is the first preview request.
 const char kIsFirstRequest[] = "isFirstRequest";
@@ skipping 12 matching lines @@
 
 // Number of copies.
 const char kSettingCopies[] = "copies";
 
 // Device name: Unique printer identifier.
 const char kSettingDeviceName[] = "deviceName";
 
 // Print job duplex mode.
 const char kSettingDuplexMode[] = "duplex";
 
+// Option to print headers and Footers: true if selected, false if not.
+const char kSettingHeaderFooterEnabled[] = "headerFooterEnabled";
+
+// Default font family name for printing the headers and footers.
+const char kSettingHeaderFooterFontFamilyName[] = "sans";
+
+// Default font name for printing the headers and footers.
+const char kSettingHeaderFooterFontName[] = "Helvetica";

[Vitaly Buka (NO REVIEWS), 2012/10/09 06:05:24]

I have question to author and reviewers.
Why do we need both kSettingHeaderFooterFontFamilyName and
kSettingHeaderFooterFontName

I see that kSettingHeaderFooterFontName is used only for ElideText. Why can't we
use just kSettingHeaderFooterFontFamilyName everywhere?

+
+// Default font size for printing the headers and footers.
+const int kSettingHeaderFooterFontSize = 8;
+
+// Number of horizontal regions for headers and footers.
+const float kSettingHeaderFooterHorizontalRegions = 3;
+
+// Interstice or gap between different header footer components.
+// Hardcoded to 0.25cm = 1/10" = 7.2points.
+const float kSettingHeaderFooterInterstice = 7.2f;
+
+// Key that specifies the date of the page that will be printed in the headers
+// and footers.
+const char kSettingHeaderFooterDate[] = "date";
+
+// Key that specifies the title of the page that will be printed in the headers
+// and footers.
+const char kSettingHeaderFooterTitle[] = "title";
+
+// Key that specifies the URL of the page that will be printed in the headers
+// and footers.
+const char kSettingHeaderFooterURL[] = "url";
+
 // Page orientation: true for landscape, false for portrait.
 const char kSettingLandscape[] = "landscape";
 
 // A page range.
 const char kSettingPageRange[] = "pageRange";
 
 // The first page of a page range. (1-based)
 const char kSettingPageRangeFrom[] = "from";
 
 // The last page of a page range. (1-based)
 const char kSettingPageRangeTo[] = "to";
 
 // Printer name.
 const char kSettingPrinterName[] = "printerName";
 
 // Print to PDF option: true if selected, false if not.
 const char kSettingPrintToPDF[] = "printToPDF";
 
 // Indices used to represent first page, invalid page and complete
 // preview document.
 const int FIRST_PAGE_INDEX = 0;
 const int COMPLETE_PREVIEW_DOCUMENT_INDEX = -1;
 const int INVALID_PAGE_INDEX = -2;
 
 }  // namespace printing