docshell/base/nsIReflowObserver.idl
author Iain Ireland <iireland@mozilla.com>
Fri, 11 Jan 2019 18:05:36 +0000
changeset 453523 025feea5945bffc625e9cca2e23be51ee8670315
parent 148222 69da3bab9facb91f0e845443f90bf611b6b46a53
permissions -rw-r--r--
Bug 1480390: Move ForOfIterClose logic inside TryNoteIter r=tcampbell This patch was intended to be a pure refactoring of existing code with no side-effects, moving the logic for handling for-of/for-of-iterclose trynotes inside TryNoteIter to avoid duplicating logic in all users of TryNoteIter. However, it turns out that there was a subtle preexisting bug in TryNoteIter that is fixed by the refactoring. Specifically, the logic to skip from a for-of-iterclose to its enclosing for-of must run before the logic to skip trynotes based on stack depth. Otherwise, the stack depth code may filter out the enclosing for-of (see the attached test case for an example) and we will skip too many try-notes. Differential Revision: https://phabricator.services.mozilla.com/D14783

/* 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 "domstubs.idl"

[scriptable, uuid(832e692c-c4a6-11e2-8fd1-dce678957a39)]
interface nsIReflowObserver : nsISupports
{
  /**
   * Called when an uninterruptible reflow has occurred.
   *
   * @param start timestamp when reflow ended, in milliseconds since
   *              navigationStart (accurate to 1/1000 of a ms)
   * @param end   timestamp when reflow ended, in milliseconds since
   *              navigationStart (accurate to 1/1000 of a ms)
   */
  void reflow(in DOMHighResTimeStamp start,
              in DOMHighResTimeStamp end);

  /**
   * Called when an interruptible reflow has occurred.
   *
   * @param start timestamp when reflow ended, in milliseconds since
   *              navigationStart (accurate to 1/1000 of a ms)
   * @param end   timestamp when reflow ended, in milliseconds since
   *              navigationStart (accurate to 1/1000 of a ms)
   */
  void reflowInterruptible(in DOMHighResTimeStamp start,
                           in DOMHighResTimeStamp end);
};