Added Header and Footer support using Skia

chrome/browser/resources/print_preview/header_footer_settings.js

+// 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.
+
+cr.define('print_preview', function() {
+  'use strict';
+
+  /**
+   * Creates a HeaderFooterSettings object. This object encapsulates all
+   * settings and logic related to the headers and footers checkbox.
+   * @constructor
+   */
+  function HeaderFooterSettings() {
+    this.headerFooterOption_ = $('header-footer-option');
+    this.headerFooterCheckbox_ = $('header-footer');
+  }
+
+  cr.addSingletonGetter(HeaderFooterSettings);
+
+  HeaderFooterSettings.prototype = {
+    /**
+     * The checkbox corresponding to the headers and footers option.
+     * @type {HTMLInputElement}
+     */
+    get headerFooterCheckbox() {
+      return this.headerFooterCheckbox_;
+    },
+
+    /**
+     * Checks whether the Headers and Footers checkbox is checked or not.
+     * @return {boolean} true if Headers and Footers are checked.
+     */
+    hasHeaderFooter: function() {
+      return this.headerFooterCheckbox_.checked;
+    },
+
+    /**
+     * Adding listeners to header footer related controls.
+     */
+    addEventListeners: function() {
+      this.headerFooterCheckbox_.onclick =
+          this.onHeaderFooterChanged_.bind(this);
+      document.addEventListener('PDFLoaded', this.onPDFLoaded_.bind(this));
+    },
+
+    /**
+     * Listener executing when the user selects or de-selects the headers
+     * and footers option.
+     * @private
+     */
+    onHeaderFooterChanged_: function() {
+      requestPrintPreview();
+    },
+
+    /**
+     * Listener executing when a PDFLoaded event occurs.
+     * @private
+     */
+    onPDFLoaded_: function() {
+      if (!previewModifiable)
+        fadeOutElement(this.headerFooterOption_);
+    },
+  };
+
+  return {
+    HeaderFooterSettings: HeaderFooterSettings,
+  };
+});