Added Header and Footer support using Skia

chrome/browser/resources/print_preview/print_preview.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.
 
 // require: cr/ui/print_preview_cloud.js
 
 var localStrings = new LocalStrings();
 
 // If useCloudPrint is true we attempt to connect to cloud print
 // and populate the list of printers with cloud print printers.
@@ skipping 77 matching lines @@
 }
 
 /**
  * Adds event listeners to the settings controls.
  */
 function addEventListeners() {
   // Controls that require preview rendering.
   $('landscape').onclick = onLayoutModeToggle;
   $('portrait').onclick = onLayoutModeToggle;
   $('printer-list').onchange = updateControlsWithSelectedPrinterCapabilities;
+  $('header-footer').onclick = onHeaderFooterChanged;
 
   // Controls that do not require preview rendering.
   $('color').onclick = function() { setColor(true); };
   $('bw').onclick = function() { setColor(false); };
 }
 
 /**
  * Removes event listeners from the settings controls.
  */
 function removeEventListeners() {
   clearTimeout(pageSettings.timerId_);
 
   // Controls that require preview rendering
   $('landscape').onclick = null;
   $('portrait').onclick = null;
   $('printer-list').onchange = null;
+  $('header-footer').onclick = null;
 
   // Controls that don't require preview rendering.
   $('color').onclick = null;
   $('bw').onclick = null;
 }
 
 /**
  * Disables the input elements in the sidebar.
  */
 function disableInputElementsInSidebar() {
@@ skipping 210 matching lines @@
  * @return {number} duplex mode.
  */
 function getDuplexMode() {
   // Constants values matches printing::DuplexMode enum.
   const SIMPLEX = 0;
   const LONG_EDGE = 1;
   return !copiesSettings.twoSidedCheckbox.checked ? SIMPLEX : LONG_EDGE;
 }
 
 /**
+ * Checks whether the Headers and Footers checkbox is checked or not.
+ *
+ * @return {boolean} true if Headers and Footers are checked.
+ */
+function hasHeaderFooter() {
+  return $('header-footer').checked;
+}
+
+/**
  * Creates a JSON string based on the values in the printer settings.
  *
  * @return {string} JSON string with print job settings.
  */
 function getSettingsJSON() {
   var deviceName = getSelectedPrinterName();
   var printToPDF = (deviceName == PRINT_TO_PDF);
 
   var settings = {'deviceName': deviceName,
                   'pageRange': pageSettings.selectedPageRanges,
                   'printAll': pageSettings.allPagesRadioButton.checked,
                   'duplex': getDuplexMode(),
                   'copies': copiesSettings.numberOfCopies,
                   'collate': isCollated(),
                   'landscape': isLandscape(),
                   'color': isColor(),
-                  'printToPDF': printToPDF};
+                  'printToPDF': printToPDF,
+                  'headerFooter': hasHeaderFooter()};
   var printerList = $('printer-list');
   var selectedPrinter = printerList.selectedIndex;
   if (cloudprint.isCloudPrint(printerList.options[selectedPrinter])) {
     settings['cloudPrintID'] =
         printerList.options[selectedPrinter].value;
   }
 
   return JSON.stringify(settings);
 }
 
@@ skipping 457 matching lines @@
   tempPrintSettings.save();
 
   if (printSettings.deviceName != tempPrintSettings.deviceName) {
     updateControlsWithSelectedPrinterCapabilities();
     return true;
   }
   if (printSettings.isLandscape != tempPrintSettings.isLandscape) {
     setDefaultValuesAndRegeneratePreview();
     return true;
   }
+  if (printSettings.hasHeaderFooter != tempPrintSettings.hasHeaderFooter) {
+    requestPrintPreview();
+    return true;
+  }
   if (pageSettings.requestPrintPreviewIfNeeded())
     return true;
 
   return false;
 }
 
 /**
  * Create the PDF plugin or reload the existing one.
  * @param {string} previewUid Preview unique identifier.
  */
@@ skipping 112 matching lines @@
  * Even if they are still valid the content of these pages will be different.
  */
 function onLayoutModeToggle() {
   // If the chosen layout is same as before, nothing needs to be done.
   if (printSettings.isLandscape == isLandscape())
     return;
   setDefaultValuesAndRegeneratePreview();
 }
 
 /**
+ * When the user selects or de-selects the Headers and footers option then we

[kmadhusu, 2011/07/14 01:50:15]

Headers -> headers

[Aayush Kumar, 2011/07/19 01:20:30]

Done.

+ * regenerate the preview pdf.
+ */
+function onHeaderFooterChanged() {

[dpapad, 2011/07/14 15:59:35]

Are headers and footers always available? For example when a user is previewing
an existing PDF doc can we still add them? If not, the option should be hidden
if the doc is not modifiable (as we do with layout options).

[Aayush Kumar, 2011/07/19 01:20:30]

Done.

+  requestPrintPreview();
+}
+
+/**
  * Sets the default values and sends a request to regenerate preview data.
  */
 function setDefaultValuesAndRegeneratePreview() {
   pageSettings.resetState();
   requestPrintPreview();
 }
 
 /**
  * Class that represents the state of the print settings.
  */
 function PrintSettings() {
   this.deviceName = '';
   this.isLandscape = '';
+  this.hasHeaderFooter = '';
 }
 
 /**
  * Takes a snapshot of the print settings.
  */
 PrintSettings.prototype.save = function() {
   this.deviceName = getSelectedPrinterName();
   this.isLandscape = isLandscape();
+  this.hasHeaderFooter = hasHeaderFooter();
 }