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
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
|
/* -*- 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 "TextEditor.h"
#include "EditorUtils.h"
#include "HTMLEditor.h"
#include "SelectionState.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/dom/DataTransfer.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/DocumentInlines.h"
#include "mozilla/dom/Selection.h"
#include "nsAString.h"
#include "nsCOMPtr.h"
#include "nsContentUtils.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsIClipboard.h"
#include "nsIContent.h"
#include "nsIDragService.h"
#include "nsIDragSession.h"
#include "nsIPrincipal.h"
#include "nsIFormControl.h"
#include "nsISupportsPrimitives.h"
#include "nsITransferable.h"
#include "nsIVariant.h"
#include "nsLiteralString.h"
#include "nsRange.h"
#include "nsServiceManagerUtils.h"
#include "nsString.h"
#include "nsXPCOM.h"
#include "nscore.h"
namespace mozilla {
using namespace dom;
nsresult TextEditor::InsertTextFromTransferable(
nsITransferable* aTransferable) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(IsTextEditor());
nsAutoCString bestFlavor;
nsCOMPtr<nsISupports> genericDataObj;
nsresult rv = aTransferable->GetAnyTransferData(
bestFlavor, getter_AddRefs(genericDataObj));
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"nsITransferable::GetAnyDataTransferData() failed, but ignored");
if (NS_SUCCEEDED(rv) && (bestFlavor.EqualsLiteral(kTextMime) ||
bestFlavor.EqualsLiteral(kMozTextInternal))) {
AutoTransactionsConserveSelection dontChangeMySelection(*this);
nsAutoString stuffToPaste;
if (nsCOMPtr<nsISupportsString> text = do_QueryInterface(genericDataObj)) {
text->GetData(stuffToPaste);
}
MOZ_ASSERT(GetEditAction() == EditAction::ePaste);
// Use native line breaks for compatibility with Chrome.
// XXX Although, somebody has already converted native line breaks to
// XP line breaks.
UpdateEditActionData(stuffToPaste);
nsresult rv = MaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(
rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"EditorBase::MaybeDispatchBeforeInputEvent() failed");
return rv;
}
if (!stuffToPaste.IsEmpty()) {
// Sanitize possible carriage returns in the string to be inserted
nsContentUtils::PlatformToDOMLineBreaks(stuffToPaste);
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
nsresult rv =
InsertTextAsSubAction(stuffToPaste, SelectionHandling::Delete);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::InsertTextAsSubAction() failed");
return rv;
}
}
}
// Try to scroll the selection into view if the paste/drop succeeded
rv = ScrollSelectionFocusIntoView();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::ScrollSelectionFocusIntoView() failed");
return rv;
}
nsresult TextEditor::InsertDroppedDataTransferAsAction(
AutoEditActionDataSetter& aEditActionData, DataTransfer& aDataTransfer,
const EditorDOMPoint& aDroppedAt, nsIPrincipal* aSourcePrincipal) {
MOZ_ASSERT(aEditActionData.GetEditAction() == EditAction::eDrop);
MOZ_ASSERT(GetEditAction() == EditAction::eDrop);
MOZ_ASSERT(aDroppedAt.IsSet());
MOZ_ASSERT(aDataTransfer.MozItemCount() > 0);
uint32_t numItems = aDataTransfer.MozItemCount();
AutoTArray<nsString, 5> textArray;
textArray.SetCapacity(numItems);
uint32_t textLength = 0;
for (uint32_t i = 0; i < numItems; ++i) {
nsCOMPtr<nsIVariant> data;
aDataTransfer.GetDataAtNoSecurityCheck(u"text/plain"_ns, i,
getter_AddRefs(data));
if (!data) {
continue;
}
// Use nsString to avoid copying its storage to textArray.
nsString insertText;
data->GetAsAString(insertText);
if (insertText.IsEmpty()) {
continue;
}
textArray.AppendElement(insertText);
textLength += insertText.Length();
}
// Use nsString to avoid copying its storage to aEditActionData.
nsString data;
data.SetCapacity(textLength);
// Join the text array from end to start because we insert each items
// in the aDataTransfer at same point from start to end. Although I
// don't know whether this is intentional behavior.
for (nsString& text : Reversed(textArray)) {
data.Append(text);
}
// Use native line breaks for compatibility with Chrome.
// XXX Although, somebody has already converted native line breaks to
// XP line breaks.
aEditActionData.SetData(data);
nsresult rv = aEditActionData.MaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"MaybeDispatchBeforeInputEvent() failed");
return rv;
}
// Then, insert the text. Note that we shouldn't need to walk the array
// anymore because nobody should listen to mutation events of anonymous
// text node in <input>/<textarea>.
nsContentUtils::PlatformToDOMLineBreaks(data);
rv = InsertTextAt(data, aDroppedAt, DeleteSelectedContent::No);
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::InsertTextAt(DeleteSelectedContent::No) "
"failed, but ignored");
return rv;
}
nsresult TextEditor::HandlePaste(AutoEditActionDataSetter& aEditActionData,
int32_t aClipboardType) {
if (NS_WARN_IF(!GetDocument())) {
return NS_OK;
}
// The data will be initialized in InsertTextFromTransferable() if we're not
// an HTMLEditor. Therefore, we cannot dispatch "beforeinput" here.
// Get Clipboard Service
nsresult rv;
nsCOMPtr<nsIClipboard> clipboard =
do_GetService("@mozilla.org/widget/clipboard;1", &rv);
if (NS_FAILED(rv)) {
NS_WARNING("Failed to get nsIClipboard service");
return rv;
}
// Get the nsITransferable interface for getting the data from the clipboard
Result<nsCOMPtr<nsITransferable>, nsresult> maybeTransferable =
EditorUtils::CreateTransferableForPlainText(*GetDocument());
if (maybeTransferable.isErr()) {
NS_WARNING("EditorUtils::CreateTransferableForPlainText() failed");
return maybeTransferable.unwrapErr();
}
nsCOMPtr<nsITransferable> transferable(maybeTransferable.unwrap());
if (NS_WARN_IF(!transferable)) {
NS_WARNING(
"EditorUtils::CreateTransferableForPlainText() returned nullptr, but "
"ignored");
return NS_OK; // XXX Why?
}
// Get the Data from the clipboard.
rv = clipboard->GetData(transferable, aClipboardType);
if (NS_FAILED(rv)) {
NS_WARNING("nsIClipboard::GetData() failed, but ignored");
return NS_OK; // XXX Why?
}
// XXX Why don't we check this first?
if (!IsModifiable()) {
return NS_OK;
}
rv = InsertTextFromTransferable(transferable);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"TextEditor::InsertTextFromTransferable() failed");
return rv;
}
nsresult TextEditor::HandlePasteTransferable(
AutoEditActionDataSetter& aEditActionData, nsITransferable& aTransferable) {
if (!IsModifiable()) {
return NS_OK;
}
// FYI: The data of beforeinput will be initialized in
// InsertTextFromTransferable(). Therefore, here does not touch
// aEditActionData.
nsresult rv = InsertTextFromTransferable(&aTransferable);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"TextEditor::InsertTextFromTransferable() failed");
return rv;
}
bool TextEditor::CanPaste(int32_t aClipboardType) const {
if (AreClipboardCommandsUnconditionallyEnabled()) {
return true;
}
// can't paste if readonly
if (!IsModifiable()) {
return false;
}
nsresult rv;
nsCOMPtr<nsIClipboard> clipboard(
do_GetService("@mozilla.org/widget/clipboard;1", &rv));
if (NS_FAILED(rv)) {
NS_WARNING("Failed to get nsIClipboard service");
return false;
}
// the flavors that we can deal with
AutoTArray<nsCString, 1> textEditorFlavors = {nsDependentCString(kTextMime)};
bool haveFlavors;
rv = clipboard->HasDataMatchingFlavors(textEditorFlavors, aClipboardType,
&haveFlavors);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"nsIClipboard::HasDataMatchingFlavors() failed");
return NS_SUCCEEDED(rv) && haveFlavors;
}
bool TextEditor::CanPasteTransferable(nsITransferable* aTransferable) {
// can't paste if readonly
if (!IsModifiable()) {
return false;
}
// If |aTransferable| is null, assume that a paste will succeed.
if (!aTransferable) {
return true;
}
nsCOMPtr<nsISupports> data;
nsresult rv = aTransferable->GetTransferData(kTextMime, getter_AddRefs(data));
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"nsITransferable::GetTransferData(kTextMime) failed");
return NS_SUCCEEDED(rv) && data;
}
} // namespace mozilla
|
