This repository has been archived by the owner on Jan 12, 2022. It is now read-only.
forked from mozilla/mozilla-central
/
CreateElementTxn.cpp
188 lines (153 loc) · 5.67 KB
/
CreateElementTxn.cpp
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
186
187
188
/* -*- 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 "CreateElementTxn.h"
#include "nsEditor.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNodeList.h"
#include "nsISelection.h"
#include "nsIDOMElement.h"
#include "nsReadableUtils.h"
#include "mozilla/dom/Element.h"
#ifdef DEBUG
static bool gNoisy = false;
#endif
using namespace mozilla;
CreateElementTxn::CreateElementTxn()
: EditTxn()
{
}
NS_IMPL_CYCLE_COLLECTION_CLASS(CreateElementTxn)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(CreateElementTxn, EditTxn)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mParent)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mNewNode)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mRefNode)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(CreateElementTxn, EditTxn)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mParent)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mNewNode)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mRefNode)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_ADDREF_INHERITED(CreateElementTxn, EditTxn)
NS_IMPL_RELEASE_INHERITED(CreateElementTxn, EditTxn)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CreateElementTxn)
NS_INTERFACE_MAP_END_INHERITING(EditTxn)
NS_IMETHODIMP CreateElementTxn::Init(nsEditor *aEditor,
const nsAString &aTag,
nsIDOMNode *aParent,
PRUint32 aOffsetInParent)
{
NS_ASSERTION(aEditor&&aParent, "null args");
if (!aEditor || !aParent) { return NS_ERROR_NULL_POINTER; }
mEditor = aEditor;
mTag = aTag;
mParent = do_QueryInterface(aParent);
mOffsetInParent = aOffsetInParent;
return NS_OK;
}
NS_IMETHODIMP CreateElementTxn::DoTransaction(void)
{
#ifdef DEBUG
if (gNoisy)
{
char* nodename = ToNewCString(mTag);
printf("Do Create Element parent = %p <%s>, offset = %d\n",
static_cast<void*>(mParent.get()), nodename, mOffsetInParent);
nsMemory::Free(nodename);
}
#endif
NS_ASSERTION(mEditor && mParent, "bad state");
NS_ENSURE_TRUE(mEditor && mParent, NS_ERROR_NOT_INITIALIZED);
nsCOMPtr<dom::Element> newContent;
//new call to use instead to get proper HTML element, bug# 39919
nsresult result = mEditor->CreateHTMLContent(mTag, getter_AddRefs(newContent));
NS_ENSURE_SUCCESS(result, result);
NS_ENSURE_STATE(newContent);
mNewNode = newContent->AsDOMNode();
// Try to insert formatting whitespace for the new node:
mEditor->MarkNodeDirty(mNewNode);
#ifdef DEBUG
if (gNoisy)
{
printf(" newNode = %p\n", static_cast<void*>(mNewNode.get()));
}
#endif
// insert the new node
if (CreateElementTxn::eAppend == PRInt32(mOffsetInParent)) {
nsCOMPtr<nsIDOMNode> resultNode;
return mParent->AppendChild(mNewNode, getter_AddRefs(resultNode));
}
nsCOMPtr<nsINode> parent = do_QueryInterface(mParent);
NS_ENSURE_STATE(parent);
mOffsetInParent = NS_MIN(mOffsetInParent, parent->GetChildCount());
// note, it's ok for mRefNode to be null. that means append
nsIContent* refNode = parent->GetChildAt(mOffsetInParent);
mRefNode = refNode ? refNode->AsDOMNode() : nsnull;
nsCOMPtr<nsIDOMNode> resultNode;
result = mParent->InsertBefore(mNewNode, mRefNode, getter_AddRefs(resultNode));
NS_ENSURE_SUCCESS(result, result);
// only set selection to insertion point if editor gives permission
bool bAdjustSelection;
mEditor->ShouldTxnSetSelection(&bAdjustSelection);
if (!bAdjustSelection) {
// do nothing - dom range gravity will adjust selection
return NS_OK;
}
nsCOMPtr<nsISelection> selection;
result = mEditor->GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(result, result);
NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIContent> parentContent = do_QueryInterface(mParent);
NS_ENSURE_STATE(parentContent);
result = selection->CollapseNative(parentContent,
parentContent->IndexOf(newContent) + 1);
NS_ASSERTION((NS_SUCCEEDED(result)), "selection could not be collapsed after insert.");
return result;
}
NS_IMETHODIMP CreateElementTxn::UndoTransaction(void)
{
#ifdef DEBUG
if (gNoisy)
{
printf("Undo Create Element, mParent = %p, node = %p\n",
static_cast<void*>(mParent.get()),
static_cast<void*>(mNewNode.get()));
}
#endif
NS_ASSERTION(mEditor && mParent, "bad state");
NS_ENSURE_TRUE(mEditor && mParent, NS_ERROR_NOT_INITIALIZED);
nsCOMPtr<nsIDOMNode> resultNode;
return mParent->RemoveChild(mNewNode, getter_AddRefs(resultNode));
}
NS_IMETHODIMP CreateElementTxn::RedoTransaction(void)
{
#ifdef DEBUG
if (gNoisy) { printf("Redo Create Element\n"); }
#endif
NS_ASSERTION(mEditor && mParent, "bad state");
NS_ENSURE_TRUE(mEditor && mParent, NS_ERROR_NOT_INITIALIZED);
// first, reset mNewNode so it has no attributes or content
nsCOMPtr<nsIDOMCharacterData>nodeAsText = do_QueryInterface(mNewNode);
if (nodeAsText)
{
nodeAsText->SetData(EmptyString());
}
// now, reinsert mNewNode
nsCOMPtr<nsIDOMNode> resultNode;
return mParent->InsertBefore(mNewNode, mRefNode, getter_AddRefs(resultNode));
}
NS_IMETHODIMP CreateElementTxn::GetTxnDescription(nsAString& aString)
{
aString.AssignLiteral("CreateElementTxn: ");
aString += mTag;
return NS_OK;
}
NS_IMETHODIMP CreateElementTxn::GetNewNode(nsIDOMNode **aNewNode)
{
NS_ENSURE_TRUE(aNewNode, NS_ERROR_NULL_POINTER);
NS_ENSURE_TRUE(mNewNode, NS_ERROR_NOT_INITIALIZED);
*aNewNode = mNewNode;
NS_ADDREF(*aNewNode);
return NS_OK;
}