tor-browser

The Tor Browser
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DeleteMultipleRangesTransaction.cpp (4720B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 #include "DeleteMultipleRangesTransaction.h"
      7 
      8 #include "DeleteContentTransactionBase.h"
      9 #include "DeleteRangeTransaction.h"
     10 #include "EditorBase.h"
     11 #include "EditorDOMPoint.h"
     12 #include "EditTransactionBase.h"
     13 
     14 #include "nsDebug.h"
     15 
     16 namespace mozilla {
     17 
     18 NS_IMPL_CYCLE_COLLECTION_INHERITED(DeleteMultipleRangesTransaction,
     19                                   EditAggregateTransaction)
     20 
     21 NS_IMPL_ADDREF_INHERITED(DeleteMultipleRangesTransaction,
     22                         EditAggregateTransaction)
     23 NS_IMPL_RELEASE_INHERITED(DeleteMultipleRangesTransaction,
     24                          EditAggregateTransaction)
     25 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DeleteMultipleRangesTransaction)
     26 NS_INTERFACE_MAP_END_INHERITING(EditAggregateTransaction)
     27 
     28 NS_IMETHODIMP DeleteMultipleRangesTransaction::DoTransaction() {
     29  MOZ_LOG(GetLogModule(), LogLevel::Info,
     30          ("%p DeleteMultipleRangesTransaction::%s this={ mName=%s } "
     31           "Start==============================",
     32           this, __FUNCTION__,
     33           nsAtomCString(mName ? mName.get() : nsGkAtoms::_empty).get()));
     34  nsresult rv = EditAggregateTransaction::DoTransaction();
     35  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
     36                       "EditAggregateTransaction::DoTransaction() failed");
     37 
     38  MOZ_LOG(GetLogModule(), LogLevel::Info,
     39          ("%p DeleteMultipleRangesTransaction::%s this={ mName=%s } "
     40           "End==============================",
     41           this, __FUNCTION__,
     42           nsAtomCString(mName ? mName.get() : nsGkAtoms::_empty).get()));
     43  return rv;
     44 }
     45 
     46 NS_IMETHODIMP DeleteMultipleRangesTransaction::UndoTransaction() {
     47  MOZ_LOG(GetLogModule(), LogLevel::Info,
     48          ("%p DeleteMultipleRangesTransaction::%s this={ mName=%s } "
     49           "Start==============================",
     50           this, __FUNCTION__,
     51           nsAtomCString(mName ? mName.get() : nsGkAtoms::_empty).get()));
     52 
     53  nsresult rv = EditAggregateTransaction::UndoTransaction();
     54  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
     55                       "EditAggregateTransaction::UndoTransaction() failed");
     56 
     57  MOZ_LOG(GetLogModule(), LogLevel::Info,
     58          ("%p DeleteMultipleRangesTransaction::%s this={ mName=%s } "
     59           "End==============================",
     60           this, __FUNCTION__,
     61           nsAtomCString(mName ? mName.get() : nsGkAtoms::_empty).get()));
     62  return rv;
     63 }
     64 
     65 NS_IMETHODIMP DeleteMultipleRangesTransaction::RedoTransaction() {
     66  MOZ_LOG(GetLogModule(), LogLevel::Info,
     67          ("%p DeleteMultipleRangesTransaction::%s this={ mName=%s } "
     68           "Start==============================",
     69           this, __FUNCTION__,
     70           nsAtomCString(mName ? mName.get() : nsGkAtoms::_empty).get()));
     71 
     72  nsresult rv = EditAggregateTransaction::RedoTransaction();
     73  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
     74                       "EditAggregateTransaction::RedoTransaction() failed");
     75 
     76  MOZ_LOG(GetLogModule(), LogLevel::Info,
     77          ("%p DeleteMultipleRangesTransaction::%s this={ mName=%s } "
     78           "End==============================",
     79           this, __FUNCTION__,
     80           nsAtomCString(mName ? mName.get() : nsGkAtoms::_empty).get()));
     81  return rv;
     82 }
     83 
     84 void DeleteMultipleRangesTransaction::AppendChild(
     85    DeleteContentTransactionBase& aTransaction) {
     86  mChildren.AppendElement(aTransaction);
     87 }
     88 
     89 void DeleteMultipleRangesTransaction::AppendChild(
     90    DeleteRangeTransaction& aTransaction) {
     91  mChildren.AppendElement(aTransaction);
     92 }
     93 
     94 EditorDOMPoint DeleteMultipleRangesTransaction::SuggestPointToPutCaret() const {
     95  for (const OwningNonNull<EditTransactionBase>& transaction :
     96       Reversed(mChildren)) {
     97    if (const DeleteContentTransactionBase* deleteContentTransaction =
     98            transaction->GetAsDeleteContentTransactionBase()) {
     99      EditorDOMPoint pointToPutCaret =
    100          deleteContentTransaction->SuggestPointToPutCaret();
    101      if (pointToPutCaret.IsSet()) {
    102        return pointToPutCaret;
    103      }
    104      continue;
    105    }
    106    if (const DeleteRangeTransaction* deleteRangeTransaction =
    107            transaction->GetAsDeleteRangeTransaction()) {
    108      EditorDOMPoint pointToPutCaret =
    109          deleteRangeTransaction->SuggestPointToPutCaret();
    110      if (pointToPutCaret.IsSet()) {
    111        return pointToPutCaret;
    112      }
    113      continue;
    114    }
    115    MOZ_ASSERT_UNREACHABLE(
    116        "Child transactions must be DeleteContentTransactionBase or "
    117        "DeleteRangeTransaction");
    118  }
    119  return EditorDOMPoint();
    120 }
    121 
    122 }  // namespace mozilla