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
|
/* -*- 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/. */
#ifndef nsBaseClipboard_h__
#define nsBaseClipboard_h__
#include "mozilla/dom/PContent.h"
#include "mozilla/Logging.h"
#include "mozilla/MoveOnlyFunction.h"
#include "mozilla/Result.h"
#include "nsIClipboard.h"
#include "nsITransferable.h"
#include "nsCOMPtr.h"
static mozilla::LazyLogModule sWidgetClipboardLog("WidgetClipboard");
#define MOZ_CLIPBOARD_LOG(...) \
MOZ_LOG(sWidgetClipboardLog, mozilla::LogLevel::Debug, (__VA_ARGS__))
#define MOZ_CLIPBOARD_LOG_ENABLED() \
MOZ_LOG_TEST(sWidgetClipboardLog, mozilla::LogLevel::Debug)
class nsITransferable;
class nsIClipboardOwner;
class nsIPrincipal;
class nsIWidget;
namespace mozilla::dom {
class WindowContext;
} // namespace mozilla::dom
/**
* A base clipboard class for all platform, so that they can share the same
* implementation.
*/
class nsBaseClipboard : public nsIClipboard {
public:
explicit nsBaseClipboard(
const mozilla::dom::ClipboardCapabilities& aClipboardCaps);
// nsISupports
NS_DECL_ISUPPORTS
// nsIClipboard
NS_IMETHOD SetData(nsITransferable* aTransferable, nsIClipboardOwner* aOwner,
int32_t aWhichClipboard) override final;
NS_IMETHOD AsyncSetData(int32_t aWhichClipboard,
nsIAsyncClipboardRequestCallback* aCallback,
nsIAsyncSetClipboardData** _retval) override final;
NS_IMETHOD GetData(
nsITransferable* aTransferable, int32_t aWhichClipboard,
mozilla::dom::WindowContext* aWindowContext) override final;
NS_IMETHOD AsyncGetData(
const nsTArray<nsCString>& aFlavorList, int32_t aWhichClipboard,
mozilla::dom::WindowContext* aRequestingWindowContext,
nsIPrincipal* aRequestingPrincipal,
nsIAsyncClipboardGetCallback* aCallback) override final;
NS_IMETHOD GetDataSnapshotSync(
const nsTArray<nsCString>& aFlavorList, int32_t aWhichClipboard,
mozilla::dom::WindowContext* aRequestingWindowContext,
nsIAsyncGetClipboardData** _retval) override final;
NS_IMETHOD EmptyClipboard(int32_t aWhichClipboard) override final;
NS_IMETHOD HasDataMatchingFlavors(const nsTArray<nsCString>& aFlavorList,
int32_t aWhichClipboard,
bool* aOutResult) override final;
NS_IMETHOD IsClipboardTypeSupported(int32_t aWhichClipboard,
bool* aRetval) override final;
void AsyncGetDataInternal(
const nsTArray<nsCString>& aFlavorList, int32_t aClipboardType,
mozilla::dom::WindowContext* aRequestingWindowContext,
nsIAsyncClipboardGetCallback* aCallback);
using GetDataCallback = mozilla::MoveOnlyFunction<void(nsresult)>;
using HasMatchingFlavorsCallback = mozilla::MoveOnlyFunction<void(
mozilla::Result<nsTArray<nsCString>, nsresult>)>;
protected:
virtual ~nsBaseClipboard();
// Implement the native clipboard behavior.
NS_IMETHOD SetNativeClipboardData(nsITransferable* aTransferable,
int32_t aWhichClipboard) = 0;
NS_IMETHOD GetNativeClipboardData(nsITransferable* aTransferable,
int32_t aWhichClipboard) = 0;
virtual void AsyncGetNativeClipboardData(nsITransferable* aTransferable,
int32_t aWhichClipboard,
GetDataCallback&& aCallback);
virtual nsresult EmptyNativeClipboardData(int32_t aWhichClipboard) = 0;
virtual mozilla::Result<int32_t, nsresult> GetNativeClipboardSequenceNumber(
int32_t aWhichClipboard) = 0;
virtual mozilla::Result<bool, nsresult> HasNativeClipboardDataMatchingFlavors(
const nsTArray<nsCString>& aFlavorList, int32_t aWhichClipboard) = 0;
virtual void AsyncHasNativeClipboardDataMatchingFlavors(
const nsTArray<nsCString>& aFlavorList, int32_t aWhichClipboard,
HasMatchingFlavorsCallback&& aCallback);
void ClearClipboardCache(int32_t aClipboardType);
private:
void RejectPendingAsyncSetDataRequestIfAny(int32_t aClipboardType);
class AsyncSetClipboardData final : public nsIAsyncSetClipboardData {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIASYNCSETCLIPBOARDDATA
AsyncSetClipboardData(int32_t aClipboardType, nsBaseClipboard* aClipboard,
nsIAsyncClipboardRequestCallback* aCallback);
private:
virtual ~AsyncSetClipboardData() = default;
bool IsValid() const {
// If this request is no longer valid, the callback should be notified.
MOZ_ASSERT_IF(!mClipboard, !mCallback);
return !!mClipboard;
}
void MaybeNotifyCallback(nsresult aResult);
// The clipboard type defined in nsIClipboard.
int32_t mClipboardType;
// It is safe to use a raw pointer as it will be nullified (by calling
// NotifyCallback()) once nsBaseClipboard stops tracking us. This is
// also used to indicate whether this request is valid.
nsBaseClipboard* mClipboard;
// mCallback will be nullified once the callback is notified to ensure the
// callback is only notified once.
nsCOMPtr<nsIAsyncClipboardRequestCallback> mCallback;
};
class AsyncGetClipboardData final : public nsIAsyncGetClipboardData {
public:
AsyncGetClipboardData(
int32_t aClipboardType, int32_t aSequenceNumber,
nsTArray<nsCString>&& aFlavors, bool aFromCache,
nsBaseClipboard* aClipboard,
mozilla::dom::WindowContext* aRequestingWindowContext);
NS_DECL_ISUPPORTS
NS_DECL_NSIASYNCGETCLIPBOARDDATA
private:
virtual ~AsyncGetClipboardData() = default;
bool IsValid();
// The clipboard type defined in nsIClipboard.
const int32_t mClipboardType;
// The sequence number associated with the clipboard content for this
// request. If it doesn't match with the current sequence number in system
// clipboard, this request targets stale data and is deemed invalid.
const int32_t mSequenceNumber;
// List of available data types for clipboard content.
const nsTArray<nsCString> mFlavors;
// Data should be read from cache.
const bool mFromCache;
// This is also used to indicate whether this request is still valid.
RefPtr<nsBaseClipboard> mClipboard;
// The requesting window, which is used for Content Analysis purposes.
RefPtr<mozilla::dom::WindowContext> mRequestingWindowContext;
};
class ClipboardCache final {
public:
~ClipboardCache() {
// In order to notify the old clipboard owner.
Clear();
}
/**
* Clear the cached transferable and notify the original clipboard owner
* that it has lost ownership.
*/
void Clear();
void Update(nsITransferable* aTransferable,
nsIClipboardOwner* aClipboardOwner, int32_t aSequenceNumber) {
// Clear first to notify the old clipboard owner.
Clear();
mTransferable = aTransferable;
mClipboardOwner = aClipboardOwner;
mSequenceNumber = aSequenceNumber;
}
nsITransferable* GetTransferable() const { return mTransferable; }
nsIClipboardOwner* GetClipboardOwner() const { return mClipboardOwner; }
int32_t GetSequenceNumber() const { return mSequenceNumber; }
nsresult GetData(nsITransferable* aTransferable) const;
private:
nsCOMPtr<nsITransferable> mTransferable;
nsCOMPtr<nsIClipboardOwner> mClipboardOwner;
int32_t mSequenceNumber = -1;
};
void MaybeRetryGetAvailableFlavors(
const nsTArray<nsCString>& aFlavorList, int32_t aWhichClipboard,
nsIAsyncClipboardGetCallback* aCallback, int32_t aRetryCount,
mozilla::dom::WindowContext* aRequestingWindowContext);
// Return clipboard cache if the cached data is valid, otherwise clear the
// cached data and returns null.
ClipboardCache* GetClipboardCacheIfValid(int32_t aClipboardType);
mozilla::Result<nsTArray<nsCString>, nsresult> GetFlavorsFromClipboardCache(
int32_t aClipboardType);
nsresult GetDataFromClipboardCache(nsITransferable* aTransferable,
int32_t aClipboardType);
void RequestUserConfirmation(int32_t aClipboardType,
const nsTArray<nsCString>& aFlavorList,
mozilla::dom::WindowContext* aWindowContext,
nsIPrincipal* aRequestingPrincipal,
nsIAsyncClipboardGetCallback* aCallback);
already_AddRefed<nsIAsyncGetClipboardData>
MaybeCreateGetRequestFromClipboardCache(
const nsTArray<nsCString>& aFlavorList, int32_t aClipboardType,
mozilla::dom::WindowContext* aRequestingWindowContext);
// Track the pending request for each clipboard type separately. And only need
// to track the latest request for each clipboard type as the prior pending
// request will be canceled when a new request is made.
RefPtr<AsyncSetClipboardData>
mPendingWriteRequests[nsIClipboard::kClipboardTypeCount];
mozilla::UniquePtr<ClipboardCache> mCaches[nsIClipboard::kClipboardTypeCount];
const mozilla::dom::ClipboardCapabilities mClipboardCaps;
bool mIgnoreEmptyNotification = false;
};
#endif // nsBaseClipboard_h__
|
