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.
 
 var localStrings = new LocalStrings();
 
 // The total page count of the previewed document regardless of which pages the
 // user has selected.
 var totalPageCount;
 
@@ skipping 103 matching lines @@
   // Controls that require preview rendering.
   $('all-pages').onclick = onPageSelectionMayHaveChanged;
   $('print-pages').onclick = handleIndividualPagesCheckbox;
   var individualPages = $('individual-pages');
   individualPages.onblur = onIndividualPagesBlur;
   individualPages.onfocus = onIndividualPagesFocus;
   individualPages.oninput = onIndividualPagesInput;
   $('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); };
 }
 
 /**
  * Handles the blur event for the |individual-pages| element. Un-checks the
  * associated radio control if the input field is empty.
  */
@@ skipping 29 matching lines @@
  * Removes event listeners from the settings controls.
  */
 function removeEventListeners() {
   clearTimeout(timerId);
   setDefaultHandlersForPagesAndCopiesControls();
 
   // 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 140 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 isHeaderFooter() {

[Lei Zhang, 2011/07/12 22:04:50]

how about hasHeadersFooters() ?

[Aayush Kumar, 2011/07/13 21:52:16]

Done.

+  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 printAll = $('all-pages').checked;
   var deviceName = getSelectedPrinterName();
   var printToPDF = (deviceName == PRINT_TO_PDF);
 
   return JSON.stringify(
       {'deviceName': deviceName,
        'pageRange': pageSetToPageRanges(getSelectedPagesSet()),
        'printAll': printAll,
        'duplex': getDuplexMode(),
        'copies': copiesSettings.numberOfCopies,
        'collate': isCollated(),
        'landscape': isLandscape(),
        'color': isColor(),
-       'printToPDF': printToPDF});
+       'printToPDF': printToPDF,
+       'headerFooter': isHeaderFooter()});
 }
 
 /**
  * Returns the name of the selected printer or the empty string if no
  * printer is selected.
  */
 function getSelectedPrinterName() {
   var printerList = $('printer-list')
   var selectedPrinter = printerList.selectedIndex;
   if (selectedPrinter < 0)
@@ skipping 306 matching lines @@
   } else if (printSettings.isLandscape != tempPrintSettings.isLandscape) {
     setDefaultValuesAndRegeneratePreview();
     return true;
   } else if (isSelectedPagesValid()) {
     var currentlySelectedPages = getSelectedPagesSet();
     if (!areArraysEqual(previouslySelectedPages, currentlySelectedPages)) {
       previouslySelectedPages = currentlySelectedPages;
       requestPrintPreview();
       return true;
     }
+  } else if (printSettings.isHeaderFooter != tempPrintSettings.isHeaderFooter) {
+    requestPrintPreview();
+    return true;
   }
 
   if (!isSelectedPagesValid())
     pageRangesFieldChanged();
   return false;
 }
 
 /**
  * Create the PDF plugin or reload the existing one.
  * @param {string} previewUid Preview unique identifier.
@@ skipping 162 matching lines @@
 function onLayoutModeToggle() {
   // If the chosen layout is same as before, nothing needs to be done.
   if (printSettings.isLandscape == isLandscape())
     return;
 
   $('individual-pages').classList.remove('invalid');
   setDefaultValuesAndRegeneratePreview();
 }
 
 /**
+ * When the user selects or de-selects the Headers and footers option then we
+ * regenerate the preview pdf.
+ */
+function onHeaderFooterChanged() {
+  requestPrintPreview();
+}
+
+/**
  * Sets the default values and sends a request to regenerate preview data.
  */
 function setDefaultValuesAndRegeneratePreview() {
   fadeOutElement($('individual-pages-hint'));
   totalPageCount = undefined;
   previouslySelectedPages.length = 0;
   requestPrintPreview();
 }
 
 /**
@@ skipping 66 matching lines @@
   previouslySelectedPages = currentlySelectedPages;
   requestPrintPreview();
 }
 
 /**
  * Class that represents the state of the print settings.
  */
 function PrintSettings() {
   this.deviceName = '';
   this.isLandscape = '';
+  this.isHeaderFooter = '';
 }
 
 /**
  * Takes a snapshot of the print settings.
  */
 PrintSettings.prototype.save = function() {
   this.deviceName = getSelectedPrinterName();
   this.isLandscape = isLandscape();
+  this.isHeaderFooter = isHeaderFooter();
 }