Implement window.print() on Android

printing/android/java/src/org/chromium/printing/PrintingController.java

 // Copyright 2013 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.
 
 package org.chromium.printing;
 
 import android.print.PrintDocumentAdapter;
 
 /**
  * This interface describes a class which is responsible of talking to the printing backend.
@@ skipping 55 matching lines @@
      * @param maxPages Number of pages in the PDF, according to the last provided settings.
      *                 If this is PrintDocumentInfo.PAGE_COUNT_UNKNOWN, then use the last known
      *                 valid max pages count.
      */
     void pageCountEstimationDone(final int maxPages);
 
     /**
      * Sets PrintingContext currently associated with the controller.
      *
      * This needs to be called after PrintingContext object is created. Firstly its native
-     * counterpart is created, and then the Java.  PrintingController implementation
+     * counterpart is created, and then the Java. PrintingController implementation
      * needs this to interact with the native side, since JNI is built on PrintingContext.
      **/
     void setPrintingContext(final PrintingContextInterface printingContext);
 
     /**
      * @return Whether a complete PDF generation cycle inside Chromium has been completed.
      */
     boolean hasPrintingFinished();
+
+    /**
+     * Sets the data required to initiate a printing process. The process can later be started using
+     * {@link #startPendingPrint(PrintingContextInterface)}.
+     *
+     * @param printable An object capable of starting native side PDF generation, i.e. typically
+     *     a Tab.
+     * @param printManager The print manager that manages the print job.
+     */
+    void setPendingPrint(final Printable printable, final PrintManagerDelegate printManager);
+
+    /**
+     * Starts printing, provided that the current object already has sufficient data to start the
+     * process. (using {@link #setPendingPrint(Printable, PrintManagerDelegate)} for example)
+     *
+     * @param jsOriginatedPrintingContext The printingContext holding the callback to be used to
+     *     reply when javascript can resume. When printing is done (or could not start),
+     *     {@link PrintingContextInterface#showSystemDialogDone()} will be called on this object.
+     */
+    void startPendingPrint(PrintingContextInterface jsOriginatedPrintingContext);
+
 }