editor/txmgr/nsITransactionListener.idl
author Mike Hommey <mh+mozilla@glandium.org>
Fri, 11 Jan 2019 16:01:15 +0000
changeset 453570 daf50f25895db073e44d50fecf2e4f6fe873865d
parent 191040 1f9ddc6738f63865f02dd7823df817ae51e29f7e
permissions -rw-r--r--
Bug 1519307 - Add a new project to build useful parts of breakpad independently. r=froydnj With `ac_add_options --enable-project=tools/crashreporter` in a mozconfig, `./mach build` builds minidump_stackwalk, dump_syms and fileid. One caveat is that due to limitation in how the build system works currently, it's cumbersome to keep dump_syms as a host program for Gecko, and to make it a target program for this project. For now, keep it as a host program. We're not going to use it on automation, but it's still convenient to have for quick local builds (I've had to resort to awful hacks downstream). Differential Revision: https://phabricator.services.mozilla.com/D16299

/* -*- Mode: C++; tab-width: 2; 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"

interface nsITransaction;
interface nsITransactionManager;

/**
 * The nsITransactionListener interface.
 * <P>
 * This interface is implemented by an object that tracks transactions.
 */
[scriptable, uuid(58e330c4-7b48-11d2-98b9-00805f297d89)]
interface nsITransactionListener : nsISupports
{
  /**
   * Called before a transaction manager calls a transaction's
   * doTransaction() method.
   * @param aManager the transaction manager doing the transaction.
   * @param aTransaction the transaction being executed.
   * @result boolean value returned by listener which indicates
   * its desire to interrupt normal control flow. Listeners should
   * return true if they want to interrupt normal control flow, without
   * throwing an error.
   */
  boolean willDo(in nsITransactionManager aManager,
                      in nsITransaction aTransaction);

  /**
   * Called after a transaction manager calls the doTransaction() method of
   * a transaction.
   * @param aManager the transaction manager that did the transaction.
   * @param aTransaction the transaction that was executed.
   * @param aDoResult the nsresult returned after executing
   * the transaction.
   */
  void didDo(in nsITransactionManager aManager,
             in nsITransaction aTransaction,
             in nsresult aDoResult);

  /**
   * Called before a transaction manager calls the Undo() method of
   * a transaction.
   * @param aManager the transaction manager undoing the transaction.
   * @param aTransaction the transaction being undone.
   * @result boolean value returned by listener which indicates
   * its desire to interrupt normal control flow. Listeners should
   * return true if they want to interrupt normal control flow, without
   * throwing an error. Note that listeners can also interrupt normal
   * control flow by throwing an nsresult that indicates an error.
   */
  boolean willUndo(in nsITransactionManager aManager,
                   in nsITransaction aTransaction);

  /**
   * Called after a transaction manager calls the Undo() method of
   * a transaction.
   * @param aManager the transaction manager undoing the transaction.
   * @param aTransaction the transaction being undone.
   * @param aUndoResult the nsresult returned after undoing the transaction.
   */
  void didUndo(in nsITransactionManager aManager,
               in nsITransaction aTransaction,
               in nsresult aUndoResult);

  /**
   * Called before a transaction manager calls the Redo() method of
   * a transaction.
   * @param aManager the transaction manager redoing the transaction.
   * @param aTransaction the transaction being redone.
   * @result boolean value returned by listener which indicates
   * its desire to interrupt normal control flow. Listeners should
   * return true if they want to interrupt normal control flow, without
   * throwing an error. Note that listeners can also interrupt normal
   * control flow by throwing an nsresult that indicates an error.
   */
  boolean willRedo(in nsITransactionManager aManager,
                   in nsITransaction aTransaction);

  /**
   * Called after a transaction manager calls the Redo() method of
   * a transaction.
   * @param aManager the transaction manager redoing the transaction.
   * @param aTransaction the transaction being redone.
   * @param aRedoResult the nsresult returned after redoing the transaction.
   */
  void didRedo(in nsITransactionManager aManager,
               in nsITransaction aTransaction,
               in nsresult aRedoResult);

  /**
   * Called before a transaction manager begins a batch.
   * @param aManager the transaction manager beginning a batch.
   * @result boolean value returned by listener which indicates
   * its desire to interrupt normal control flow. Listeners should
   * return true if they want to interrupt normal control flow, without
   * throwing an error. Note that listeners can also interrupt normal
   * control flow by throwing an nsresult that indicates an error.
   */
  boolean willBeginBatch(in nsITransactionManager aManager);

  /**
   * Called after a transaction manager begins a batch.
   * @param aManager the transaction manager that began a batch.
   * @param aResult the nsresult returned after beginning a batch.
   */
  void didBeginBatch(in nsITransactionManager aManager,
                     in nsresult aResult);

  /**
   * Called before a transaction manager ends a batch.
   * @param aManager the transaction manager ending a batch.
   * @result boolean value returned by listener which indicates
   * its desire to interrupt normal control flow. Listeners should
   * return true if they want to interrupt normal control flow, without
   * throwing an error. Note that listeners can also interrupt normal
   * control flow by throwing an nsresult that indicates an error.
   */
  boolean willEndBatch(in nsITransactionManager aManager);

  /**
   * Called after a transaction manager ends a batch.
   * @param aManager the transaction manager ending a batch.
   * @param aResult the nsresult returned after ending a batch.
   */
  void didEndBatch(in nsITransactionManager aManager,
                   in nsresult aResult);

  /**
   * Called before a transaction manager tries to merge
   * a transaction, that was just executed, with the
   * transaction at the top of the undo stack.
   * @param aManager the transaction manager ending a batch.
   * @param aTopTransaction the transaction at the top of the undo stack.
   * @param aTransactionToMerge the transaction to merge.
   * @result boolean value returned by listener which indicates
   * its desire to interrupt normal control flow. Listeners should
   * return true if they want to interrupt normal control flow, without
   * throwing an error. Note that listeners can also interrupt normal
   * control flow by throwing an nsresult that indicates an error.
   */
  boolean willMerge(in nsITransactionManager aManager,
                    in nsITransaction aTopTransaction,
                    in nsITransaction aTransactionToMerge);

  /**
   * Called after a transaction manager tries to merge
   * a transaction, that was just executed, with the
   * transaction at the top of the undo stack.
   * @param aManager the transaction manager ending a batch.
   * @param aTopTransaction the transaction at the top of the undo stack.
   * @param aTransactionToMerge the transaction to merge.
   * @param aDidMerge true if transaction was merged, else false.
   * @param aMergeResult the nsresult returned after the merge attempt.
   * @param aInterrupt listeners should set this to PR_TRUE if they
   * want to interrupt normal control flow, without throwing an error.
   */
  void didMerge(in nsITransactionManager aManager,
                in nsITransaction aTopTransaction,
                in nsITransaction aTransactionToMerge,
                in boolean aDidMerge,
                in nsresult aMergeResult);


  /* XXX: We should probably add pruning notification methods. */
};