editor/libeditor/DeleteMultipleRangesTransaction.cpp

   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