1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/* -*- 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 "DeleteNodeTransaction.h"
#include "HTMLEditUtils.h"
#include "mozilla/EditorBase.h"
#include "mozilla/Logging.h"
#include "mozilla/SelectionState.h" // RangeUpdater
#include "mozilla/TextEditor.h"
#include "mozilla/ToString.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsAString.h"
namespace mozilla {
// static
already_AddRefed<DeleteNodeTransaction> DeleteNodeTransaction::MaybeCreate(
EditorBase& aEditorBase, nsIContent& aContentToDelete) {
RefPtr<DeleteNodeTransaction> transaction =
new DeleteNodeTransaction(aEditorBase, aContentToDelete);
if (NS_WARN_IF(!transaction->CanDoIt())) {
return nullptr;
}
return transaction.forget();
}
DeleteNodeTransaction::DeleteNodeTransaction(EditorBase& aEditorBase,
nsIContent& aContentToDelete)
: mEditorBase(&aEditorBase),
mContentToDelete(&aContentToDelete),
mParentNode(aContentToDelete.GetParentNode()) {
MOZ_DIAGNOSTIC_ASSERT_IF(
aEditorBase.IsHTMLEditor(),
HTMLEditUtils::IsRemovableNode(aContentToDelete) ||
// It's okay to delete text node if it's added by `HTMLEditor` since
// remaining it may be noisy for the users.
(aContentToDelete.IsText() &&
aContentToDelete.HasFlag(NS_MAYBE_MODIFIED_FREQUENTLY)));
NS_ASSERTION(
!aEditorBase.IsHTMLEditor() ||
HTMLEditUtils::IsRemovableNode(aContentToDelete),
"Deleting non-editable text node, please write a test for this!!");
}
std::ostream& operator<<(std::ostream& aStream,
const DeleteNodeTransaction& aTransaction) {
aStream << "{ mContentToDelete=" << aTransaction.mContentToDelete.get();
if (aTransaction.mContentToDelete) {
aStream << " (" << *aTransaction.mContentToDelete << ")";
}
aStream << ", mParentNode=" << aTransaction.mParentNode.get();
if (aTransaction.mParentNode) {
aStream << " (" << *aTransaction.mParentNode << ")";
}
aStream << ", mRefContent=" << aTransaction.mRefContent.get();
if (aTransaction.mRefContent) {
aStream << " (" << *aTransaction.mRefContent << ")";
}
aStream << ", mEditorBase=" << aTransaction.mEditorBase.get() << " }";
return aStream;
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(DeleteNodeTransaction, EditTransactionBase,
mEditorBase, mContentToDelete, mParentNode,
mRefContent)
NS_IMPL_ADDREF_INHERITED(DeleteNodeTransaction, EditTransactionBase)
NS_IMPL_RELEASE_INHERITED(DeleteNodeTransaction, EditTransactionBase)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DeleteNodeTransaction)
NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
bool DeleteNodeTransaction::CanDoIt() const {
if (NS_WARN_IF(!mContentToDelete) || NS_WARN_IF(!mEditorBase) ||
!mParentNode) {
return false;
}
return mEditorBase->IsTextEditor() ||
HTMLEditUtils::IsSimplyEditableNode(*mParentNode);
}
NS_IMETHODIMP DeleteNodeTransaction::DoTransaction() {
MOZ_LOG(GetLogModule(), LogLevel::Info,
("%p DeleteNodeTransaction::%s this=%s", this, __FUNCTION__,
ToString(*this).c_str()));
if (NS_WARN_IF(!CanDoIt())) {
return NS_OK;
}
MOZ_ASSERT_IF(mEditorBase->IsTextEditor(), !mContentToDelete->IsText());
// Remember which child mContentToDelete was (by remembering which child was
// next). Note that mRefContent can be nullptr.
mRefContent = mContentToDelete->GetNextSibling();
// give range updater a chance. SelAdjDeleteNode() needs to be called
// *before* we do the action, unlike some of the other RangeItem update
// methods.
mEditorBase->RangeUpdaterRef().SelAdjDeleteNode(*mContentToDelete);
OwningNonNull<nsINode> parentNode = *mParentNode;
OwningNonNull<nsIContent> contentToDelete = *mContentToDelete;
ErrorResult error;
parentNode->RemoveChild(contentToDelete, error);
NS_WARNING_ASSERTION(!error.Failed(), "nsINode::RemoveChild() failed");
return error.StealNSResult();
}
NS_IMETHODIMP DeleteNodeTransaction::UndoTransaction() {
MOZ_LOG(GetLogModule(), LogLevel::Info,
("%p DeleteNodeTransaction::%s this=%s", this, __FUNCTION__,
ToString(*this).c_str()));
if (NS_WARN_IF(!CanDoIt())) {
// This is a legal state, the transaction is a no-op.
return NS_OK;
}
ErrorResult error;
OwningNonNull<EditorBase> editorBase = *mEditorBase;
OwningNonNull<nsINode> parentNode = *mParentNode;
OwningNonNull<nsIContent> contentToDelete = *mContentToDelete;
nsCOMPtr<nsIContent> refContent = mRefContent;
// XXX Perhaps, we should check `refContent` is a child of `parentNode`,
// and if it's not, we should stop undoing or something.
parentNode->InsertBefore(contentToDelete, refContent, error);
// InsertBefore() may call MightThrowJSException() even if there is no error.
// We don't need the flag here.
error.WouldReportJSException();
if (error.Failed()) {
NS_WARNING("nsINode::InsertBefore() failed");
return error.StealNSResult();
}
return NS_OK;
}
NS_IMETHODIMP DeleteNodeTransaction::RedoTransaction() {
MOZ_LOG(GetLogModule(), LogLevel::Info,
("%p DeleteNodeTransaction::%s this=%s", this, __FUNCTION__,
ToString(*this).c_str()));
if (NS_WARN_IF(!CanDoIt())) {
// This is a legal state, the transaction is a no-op.
return NS_OK;
}
mEditorBase->RangeUpdaterRef().SelAdjDeleteNode(*mContentToDelete);
OwningNonNull<nsINode> parentNode = *mParentNode;
OwningNonNull<nsIContent> contentToDelete = *mContentToDelete;
ErrorResult error;
parentNode->RemoveChild(contentToDelete, error);
NS_WARNING_ASSERTION(!error.Failed(), "nsINode::RemoveChild() failed");
return error.StealNSResult();
}
} // namespace mozilla
|
