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/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

%{C++
#include <functional>

namespace mozilla {
namespace dom {
class PrintPreviewResultInfo;
} // namespace dom
namespace layout {
class RemotePrintJobChild;
} // namespace layout
} // namespace mozilla
%}

interface mozIDOMWindowProxy;
interface nsIPrintSettings;
interface nsIWebProgressListener;

native PrintPreviewResolver(std::function<void(const mozilla::dom::PrintPreviewResultInfo&)>&&);
[ptr] native RemotePrintJobChildPtr(mozilla::layout::RemotePrintJobChild);

/**
 * nsIWebBrowserPrint corresponds to the main interface
 * for printing an embedded Gecko web browser window/document
 */
[scriptable, uuid(c9a934ed-fff1-4971-bfba-6c25ad70e1e6)]
interface nsIWebBrowserPrint : nsISupports
{
  /**
   * PrintPreview Navigation Constants
   *
   * XXXdholbert Consider renaming these? Strictly speaking, these deal with
   * *sheets* (which are roughly the same as pages in the default configuration
   * of one page per sheet). Fix in bug 1669762.
   */
  const short PRINTPREVIEW_GOTO_PAGENUM = 0;
  const short PRINTPREVIEW_PREV_PAGE    = 1;
  const short PRINTPREVIEW_NEXT_PAGE    = 2;
  const short PRINTPREVIEW_HOME         = 3;
  const short PRINTPREVIEW_END          = 4;

  /**
   * Returns whether it is in Print mode
   */
  readonly attribute boolean doingPrint;

  /**
   * Returns whether it is in Print Preview mode
   */
  readonly attribute boolean doingPrintPreview;

  /**
   * This represents the "raw" total number of pages, where "raw" means that
   * this value is *not amended* to account for reductions from pages-per-sheet
   * or page ranges (unlike other APIs on this interface).
   *
   * So e.g. for a 20-page document, this attribute will be 20, regardless of
   * whether the user has chosen a smaller page range, and regardless of
   * whether the user is using pages-per-sheet to reduce the number of sheets.
   */
  readonly attribute long rawNumPages;

  /**
   * This returns the total number of pages for the Print Preview
   *
   * XXXdholbert Consider renaming this? Strictly speaking, this is the number
   * of *sheets* (which is the same as the number of pages in the default
   * configuration of one page per sheet). Fix in bug 1669762.
   */
  readonly attribute long printPreviewNumPages;

  /**
   * This returns the number of the page which is currently in the Print Preview viewport
   *
   * XXXdholbert Consider renaming this? (similar to printPreviewNumPages above)
   * Strictly speaking, this is the number of the *sheet* which is currently in
   * the print preview viewport. Fix in bug 1669762.
   */
  readonly attribute long printPreviewCurrentPageNumber;

  /**
   * Print the specified DOM window
   *
   * @param aThePrintSettings - Printer Settings for the print job, if aThePrintSettings is null
   *                            then the global PS will be used.
   * @param aWPListener - is updated during the print
   * @return void
   *
   * @note To cancel, close the window of the document that is being printed.
   */
  [noscript] void print(in nsIPrintSettings aThePrintSettings,
                        in RemotePrintJobChildPtr aRemotePrintJob,
                        in nsIWebProgressListener aWPListener);

  /**
   * Print Preview the specified DOM window
   *
   * @param aThePrintSettings - Printer Settings for the print preview, if aThePrintSettings is null
   *                            then the global PS will be used.
   * @param aWPListener - is updated during the printpreview
   * @return void
   *
   * @note To cancel, close the print preview document's window.
   */
  [noscript] void printPreview(in nsIPrintSettings aThePrintSettings,
                               in nsIWebProgressListener aWPListener,
                               in PrintPreviewResolver aCallback);

  /**
   * @param aNavType - navigation enum
   * @param aPageNum - page num to navigate to when aNavType = ePrintPreviewGoToPageNum
   * @return void
   */
  void printPreviewScrollToPage(in short aNavType, in long aPageNum);

  /**
   * This exists PrintPreview mode and returns browser window to galley mode
   * @return void
   */
  void exitPrintPreview();

};