Added Header and Footer support using Skia

printing/header_footer_initializer.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/header_footer_initializer.h"
+
+#include <algorithm>
+#include <cmath>
+
+#include "base/i18n/time_formatting.h"
+#include "base/string_number_conversions.h"
+#include "base/time.h"
+#include "base/utf_string_conversions.h"
+#include "base/values.h"
+#include "googleurl/src/gurl.h"
+#include "printing/print_job_constants.h"
+#include "printing/print_settings.h"
+#include "printing/units.h"
+#include "ui/base/text/text_elider.h"
+
+using base::DictionaryValue;
+using base::Time;
+using printing::ConvertPointsToPixelDouble;
+using printing::ConvertUnitDouble;
+using printing::GetSegmentWidth;
+
+namespace printing {
+
+void HeaderFooterInitializer::InitHeaderFooterStrings(
+      const DictionaryValue& header_footer_info,
+      PrintSettings* print_settings) {
+  if (!header_footer_info.GetBoolean(printing::kSettingHeaderFooterEnabled,
+                                     &print_settings->display_header_footer)) {
+    NOTREACHED();
+  }
+  if (!print_settings->display_header_footer)
+    return;
+
+  string16 date = base::TimeFormatShortDateNumeric(Time::Now());
+  string16 title;
+  std::string url;
+  if (!header_footer_info.GetString(printing::kSettingHeaderFooterTitle,
+                                    &title) ||
+      !header_footer_info.GetString(printing::kSettingHeaderFooterURL,
+                                    &url)) {
+    NOTREACHED();
+  }
+
+  gfx::Font font(UTF8ToUTF16(printing::kSettingHeaderFooterFontName),
+                 ceil(ConvertPointsToPixelDouble(
+                     printing::kSettingHeaderFooterFontSize)));
+  double segment_width = GetSegmentWidth(ConvertUnitDouble(
+      print_settings->page_setup_device_units().physical_size().width(),
+      print_settings->device_units_per_inch(),
+      printing::kPixelsPerInch));
+  date = ui::ElideText(date, font, segment_width, false);
+  print_settings->date = date;
+
+  // Calculate the available title width. If the date string is not long
+  // enough, increase the available space for the title.
+  // Assumes there is no header text to RIGHT of title.
+  double date_width = font.GetStringWidth(date);
+  double max_title_width = std::min(2 * segment_width,
+                                    2 * (segment_width - date_width) +
+                                        segment_width);
+  print_settings->title = ui::ElideText(title, font, max_title_width, false);
+
+  double max_url_width = 2 * segment_width;
+  GURL gurl(url);
+  print_settings->url = ui::ElideUrl(gurl, font, max_url_width, std::string());
+}
+
+}  // namespace printing
+