Move PDF printing setting in JS part.

atom/browser/api/lib/web-contents.coffee

@@ -3,6 +3,9 @@ NavigationController = require './navigation-controller'
 binding = process.atomBinding 'web_contents'
 ipc = require 'ipc'
 
+nextId = 0
+getNextId = -> ++nextId
+
 wrapWebContents = (webContents) ->
   # webContents is an EventEmitter.
   webContents.__proto__ = EventEmitter.prototype
@@ -58,6 +61,46 @@ wrapWebContents = (webContents) ->
     Object.defineProperty event, 'sender', value: webContents
     ipc.emit channel, event, args...
 
+  webContents.printToPDF = (options, callback) ->
+    printingSetting =
+      pageRage:[],
+      mediaSize:
+        height_microns:297000,
+        is_default:true,
+        name:"ISO_A4",
+        width_microns:210000,
+        custom_display_name:"A4",
+      landscape:false,
+      color:2,
+      headerFooterEnabled:false,
+      marginsType:0,
+      isFirstRequest:false,
+      requestID: getNextId(),
+      previewModifiable:true,
+      printToPDF:true,
+      printWithCloudPrint:false,
+      printWithPrivet:false,
+      printWithExtension:false,
+      deviceName:"Save as PDF",
+      generateDraftData:true,
+      fitToPageEnabled:false,
+      duplex:0,
+      copies:1,
+      collate:true,
+      shouldPrintBackgrounds:false,
+      shouldPrintSelectionOnly:false
+
+    if options.landscape
+      printingSetting.landscape = options.landscape
+    if options.marginsType
+      printingSetting.marginsType = options.marginsType
+    if options.printSelectionOnly
+      printingSetting.shouldPrintSelectionOnly = options.printSelectionOnly
+    if options.printCSSBackgrounds
+      printingSetting.shouldPrintBackgrounds = options.printBackgrounds
+
+    webContents._printToPDF printingSetting, callback
+
   webContents
 
 binding._setWrapWebContents wrapWebContents