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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/* -*- 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 "JoinNodesTransaction.h"
#include "EditorDOMPoint.h" // for EditorDOMPoint, etc.
#include "HTMLEditHelpers.h" // for SplitNodeResult
#include "HTMLEditor.h" // for HTMLEditor
#include "HTMLEditorInlines.h"
#include "HTMLEditUtils.h"
#include "mozilla/Logging.h"
#include "mozilla/ToString.h"
#include "mozilla/dom/Text.h"
#include "nsAString.h"
#include "nsDebug.h" // for NS_ASSERTION, etc.
#include "nsError.h" // for NS_ERROR_NULL_POINTER, etc.
#include "nsIContent.h" // for nsIContent
#include "nsISupportsImpl.h" // for QueryInterface, etc.
namespace mozilla {
using namespace dom;
// static
already_AddRefed<JoinNodesTransaction> JoinNodesTransaction::MaybeCreate(
HTMLEditor& aHTMLEditor, nsIContent& aLeftContent,
nsIContent& aRightContent) {
RefPtr<JoinNodesTransaction> transaction =
new JoinNodesTransaction(aHTMLEditor, aLeftContent, aRightContent);
if (NS_WARN_IF(!transaction->CanDoIt())) {
return nullptr;
}
return transaction.forget();
}
JoinNodesTransaction::JoinNodesTransaction(HTMLEditor& aHTMLEditor,
nsIContent& aLeftContent,
nsIContent& aRightContent)
: mHTMLEditor(&aHTMLEditor),
mRemovedContent(&aRightContent),
mKeepingContent(&aLeftContent) {
// printf("JoinNodesTransaction size: %zu\n", sizeof(JoinNodesTransaction));
static_assert(sizeof(JoinNodesTransaction) <= 64,
"Transaction classes may be created a lot and may be alive "
"long so that keep the foot print smaller as far as possible");
}
std::ostream& operator<<(std::ostream& aStream,
const JoinNodesTransaction& aTransaction) {
aStream << "{ mParentNode=" << aTransaction.mParentNode.get();
if (aTransaction.mParentNode) {
aStream << " (" << *aTransaction.mParentNode << ")";
}
aStream << ", mRemovedContent=" << aTransaction.mRemovedContent.get();
if (aTransaction.mRemovedContent) {
aStream << " (" << *aTransaction.mRemovedContent << ")";
}
aStream << ", mKeepingContent=" << aTransaction.mKeepingContent.get();
if (aTransaction.mKeepingContent) {
aStream << " (" << *aTransaction.mKeepingContent << ")";
}
aStream << ", mJoinedOffset=" << aTransaction.mJoinedOffset
<< ", mHTMLEditor=" << aTransaction.mHTMLEditor.get() << " }";
return aStream;
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(JoinNodesTransaction, EditTransactionBase,
mHTMLEditor, mParentNode, mRemovedContent,
mKeepingContent)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(JoinNodesTransaction)
NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
bool JoinNodesTransaction::CanDoIt() const {
if (NS_WARN_IF(!mKeepingContent) || NS_WARN_IF(!mRemovedContent) ||
NS_WARN_IF(!mHTMLEditor) ||
NS_WARN_IF(mRemovedContent->IsBeingRemoved()) ||
!mKeepingContent->IsInComposedDoc()) {
return false;
}
return HTMLEditUtils::IsRemovableFromParentNode(*mRemovedContent);
}
// After DoTransaction() and RedoTransaction(), the left node is removed from
// the content tree and right node remains.
NS_IMETHODIMP JoinNodesTransaction::DoTransaction() {
MOZ_LOG(GetLogModule(), LogLevel::Info,
("%p JoinNodesTransaction::%s this=%s", this, __FUNCTION__,
ToString(*this).c_str()));
return DoTransactionInternal(RedoingTransaction::No);
}
nsresult JoinNodesTransaction::DoTransactionInternal(
RedoingTransaction aRedoingTransaction) {
if (MOZ_UNLIKELY(NS_WARN_IF(!mHTMLEditor) || NS_WARN_IF(!mKeepingContent) ||
NS_WARN_IF(!mRemovedContent) ||
NS_WARN_IF(mRemovedContent->IsBeingRemoved()))) {
return NS_ERROR_NOT_AVAILABLE;
}
nsINode* removingContentParentNode = mRemovedContent->GetParentNode();
if (MOZ_UNLIKELY(NS_WARN_IF(!removingContentParentNode))) {
return NS_ERROR_NOT_AVAILABLE;
}
// Verify that the joining content nodes have the same parent
if (MOZ_UNLIKELY(removingContentParentNode !=
mKeepingContent->GetParentNode())) {
NS_ASSERTION(false, "Nodes do not have same parent");
return NS_ERROR_NOT_AVAILABLE;
}
// Set this instance's mParentNode. Other methods will see a non-null
// mParentNode and know all is well
mParentNode = removingContentParentNode;
// For now, setting mJoinedOffset to removed content length so that
// CreateJoinedPoint returns a point in mKeepingContent whose offset is
// the result if all content in mRemovedContent are moved to start or end of
// mKeepingContent without any intervention. The offset will be adjusted
// below.
mJoinedOffset = mKeepingContent->Length();
const OwningNonNull<HTMLEditor> htmlEditor = *mHTMLEditor;
const OwningNonNull<nsIContent> removingContent = *mRemovedContent;
const OwningNonNull<nsIContent> keepingContent = *mKeepingContent;
nsresult rv;
// Let's try to get actual joined point with the tacker.
auto joinNodesPoint = EditorDOMPoint::AtEndOf(keepingContent);
{
AutoTrackDOMPoint trackJoinNodePoint(htmlEditor->RangeUpdaterRef(),
&joinNodesPoint);
rv = htmlEditor->DoJoinNodes(keepingContent, removingContent);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::DoJoinNodes() failed");
}
// Adjust join node offset to the actual offset where the original first
// content of the right node is.
mJoinedOffset = joinNodesPoint.Offset();
if (aRedoingTransaction == RedoingTransaction::No) {
htmlEditor->DidJoinNodesTransaction(*this, rv);
}
return rv;
}
// XXX: What if instead of split, we just deleted the unneeded children of
// mRight and re-inserted mLeft?
NS_IMETHODIMP JoinNodesTransaction::UndoTransaction() {
MOZ_LOG(GetLogModule(), LogLevel::Info,
("%p JoinNodesTransaction::%s this=%s", this, __FUNCTION__,
ToString(*this).c_str()));
if (NS_WARN_IF(!mParentNode) || NS_WARN_IF(!mKeepingContent) ||
NS_WARN_IF(!mRemovedContent) || NS_WARN_IF(!mHTMLEditor)) {
return NS_ERROR_NOT_AVAILABLE;
}
const OwningNonNull<HTMLEditor> htmlEditor = *mHTMLEditor;
const OwningNonNull<nsIContent> removedContent = *mRemovedContent;
Result<SplitNodeResult, nsresult> splitNodeResult = htmlEditor->DoSplitNode(
CreateJoinedPoint<EditorDOMPoint>(), removedContent);
if (MOZ_UNLIKELY(splitNodeResult.isErr())) {
NS_WARNING("HTMLEditor::DoSplitNode() failed");
return splitNodeResult.unwrapErr();
}
// When adding caret suggestion to SplitNodeResult, here didn't change
// selection so that just ignore it.
splitNodeResult.inspect().IgnoreCaretPointSuggestion();
return NS_OK;
}
NS_IMETHODIMP JoinNodesTransaction::RedoTransaction() {
MOZ_LOG(GetLogModule(), LogLevel::Info,
("%p JoinNodesTransaction::%s this=%s", this, __FUNCTION__,
ToString(*this).c_str()));
return DoTransactionInternal(RedoingTransaction::Yes);
}
} // namespace mozilla
|
