The Tor Browser / file comparison
comparison: dom/ipc/StructuredCloneUtils.cpp
dom/ipc/StructuredCloneUtils.cpp
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:b5722ea085bb |
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 2 /* vim: set sw=4 ts=8 et tw=80 : */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #include "StructuredCloneUtils.h" | |
| 8 | |
| 9 #include "nsIDOMFile.h" | |
| 10 #include "nsIDOMDOMException.h" | |
| 11 #include "nsIMutable.h" | |
| 12 #include "nsIXPConnect.h" | |
| 13 | |
| 14 #include "nsContentUtils.h" | |
| 15 #include "nsJSEnvironment.h" | |
| 16 #include "MainThreadUtils.h" | |
| 17 #include "StructuredCloneTags.h" | |
| 18 #include "jsapi.h" | |
| 19 | |
| 20 using namespace mozilla::dom; | |
| 21 | |
| 22 namespace { | |
| 23 | |
| 24 void | |
| 25 Error(JSContext* aCx, uint32_t aErrorId) | |
| 26 { | |
| 27 MOZ_ASSERT(NS_IsMainThread()); | |
| 28 NS_DOMStructuredCloneError(aCx, aErrorId); | |
| 29 } | |
| 30 | |
| 31 JSObject* | |
| 32 Read(JSContext* aCx, JSStructuredCloneReader* aReader, uint32_t aTag, | |
| 33 uint32_t aData, void* aClosure) | |
| 34 { | |
| 35 MOZ_ASSERT(NS_IsMainThread()); | |
| 36 MOZ_ASSERT(aClosure); | |
| 37 | |
| 38 StructuredCloneClosure* closure = | |
| 39 static_cast<StructuredCloneClosure*>(aClosure); | |
| 40 | |
| 41 if (aTag == SCTAG_DOM_FILE) { | |
| 42 MOZ_ASSERT(aData < closure->mBlobs.Length()); | |
| 43 | |
| 44 nsCOMPtr<nsIDOMFile> file = do_QueryInterface(closure->mBlobs[aData]); | |
| 45 MOZ_ASSERT(file); | |
| 46 | |
| 47 #ifdef DEBUG | |
| 48 { | |
| 49 // File should not be mutable. | |
| 50 nsCOMPtr<nsIMutable> mutableFile = do_QueryInterface(file); | |
| 51 bool isMutable; | |
| 52 MOZ_ASSERT(NS_SUCCEEDED(mutableFile->GetMutable(&isMutable))); | |
| 53 MOZ_ASSERT(!isMutable); | |
| 54 } | |
| 55 #endif | |
| 56 | |
| 57 JS::Rooted<JS::Value> wrappedFile(aCx); | |
| 58 nsresult rv = nsContentUtils::WrapNative(aCx, file, &NS_GET_IID(nsIDOMFile), | |
| 59 &wrappedFile); | |
| 60 if (NS_FAILED(rv)) { | |
| 61 Error(aCx, nsIDOMDOMException::DATA_CLONE_ERR); | |
| 62 return nullptr; | |
| 63 } | |
| 64 | |
| 65 return &wrappedFile.toObject(); | |
| 66 } | |
| 67 | |
| 68 if (aTag == SCTAG_DOM_BLOB) { | |
| 69 MOZ_ASSERT(aData < closure->mBlobs.Length()); | |
| 70 | |
| 71 nsCOMPtr<nsIDOMBlob> blob = do_QueryInterface(closure->mBlobs[aData]); | |
| 72 MOZ_ASSERT(blob); | |
| 73 | |
| 74 #ifdef DEBUG | |
| 75 { | |
| 76 // Blob should not be mutable. | |
| 77 nsCOMPtr<nsIMutable> mutableBlob = do_QueryInterface(blob); | |
| 78 bool isMutable; | |
| 79 MOZ_ASSERT(NS_SUCCEEDED(mutableBlob->GetMutable(&isMutable))); | |
| 80 MOZ_ASSERT(!isMutable); | |
| 81 } | |
| 82 #endif | |
| 83 | |
| 84 JS::Rooted<JS::Value> wrappedBlob(aCx); | |
| 85 nsresult rv = nsContentUtils::WrapNative(aCx, blob, &NS_GET_IID(nsIDOMBlob), | |
| 86 &wrappedBlob); | |
| 87 if (NS_FAILED(rv)) { | |
| 88 Error(aCx, nsIDOMDOMException::DATA_CLONE_ERR); | |
| 89 return nullptr; | |
| 90 } | |
| 91 | |
| 92 return &wrappedBlob.toObject(); | |
| 93 } | |
| 94 | |
| 95 return NS_DOMReadStructuredClone(aCx, aReader, aTag, aData, nullptr); | |
| 96 } | |
| 97 | |
| 98 bool | |
| 99 Write(JSContext* aCx, JSStructuredCloneWriter* aWriter, | |
| 100 JS::Handle<JSObject*> aObj, void* aClosure) | |
| 101 { | |
| 102 MOZ_ASSERT(NS_IsMainThread()); | |
| 103 MOZ_ASSERT(aClosure); | |
| 104 | |
| 105 StructuredCloneClosure* closure = | |
| 106 static_cast<StructuredCloneClosure*>(aClosure); | |
| 107 | |
| 108 // See if this is a wrapped native. | |
| 109 nsCOMPtr<nsIXPConnectWrappedNative> wrappedNative; | |
| 110 nsContentUtils::XPConnect()-> | |
| 111 GetWrappedNativeOfJSObject(aCx, aObj, getter_AddRefs(wrappedNative)); | |
| 112 | |
| 113 if (wrappedNative) { | |
| 114 // Get the raw nsISupports out of it. | |
| 115 nsISupports* wrappedObject = wrappedNative->Native(); | |
| 116 MOZ_ASSERT(wrappedObject); | |
| 117 | |
| 118 // See if the wrapped native is a nsIDOMFile. | |
| 119 nsCOMPtr<nsIDOMFile> file = do_QueryInterface(wrappedObject); | |
| 120 if (file) { | |
| 121 nsCOMPtr<nsIMutable> mutableFile = do_QueryInterface(file); | |
| 122 if (mutableFile && | |
| 123 NS_SUCCEEDED(mutableFile->SetMutable(false)) && | |
| 124 JS_WriteUint32Pair(aWriter, SCTAG_DOM_FILE, | |
| 125 closure->mBlobs.Length())) { | |
| 126 closure->mBlobs.AppendElement(file); | |
| 127 return true; | |
| 128 } | |
| 129 } | |
| 130 | |
| 131 // See if the wrapped native is a nsIDOMBlob. | |
| 132 nsCOMPtr<nsIDOMBlob> blob = do_QueryInterface(wrappedObject); | |
| 133 if (blob) { | |
| 134 nsCOMPtr<nsIMutable> mutableBlob = do_QueryInterface(blob); | |
| 135 if (mutableBlob && | |
| 136 NS_SUCCEEDED(mutableBlob->SetMutable(false)) && | |
| 137 JS_WriteUint32Pair(aWriter, SCTAG_DOM_BLOB, | |
| 138 closure->mBlobs.Length())) { | |
| 139 closure->mBlobs.AppendElement(blob); | |
| 140 return true; | |
| 141 } | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 return NS_DOMWriteStructuredClone(aCx, aWriter, aObj, nullptr); | |
| 146 } | |
| 147 | |
| 148 JSStructuredCloneCallbacks gCallbacks = { | |
| 149 Read, | |
| 150 Write, | |
| 151 Error, | |
| 152 nullptr, | |
| 153 nullptr, | |
| 154 nullptr | |
| 155 }; | |
| 156 | |
| 157 } // anonymous namespace | |
| 158 | |
| 159 namespace mozilla { | |
| 160 namespace dom { | |
| 161 | |
| 162 bool | |
| 163 ReadStructuredClone(JSContext* aCx, uint64_t* aData, size_t aDataLength, | |
| 164 const StructuredCloneClosure& aClosure, | |
| 165 JS::MutableHandle<JS::Value> aClone) | |
| 166 { | |
| 167 void* closure = &const_cast<StructuredCloneClosure&>(aClosure); | |
| 168 return !!JS_ReadStructuredClone(aCx, aData, aDataLength, | |
| 169 JS_STRUCTURED_CLONE_VERSION, aClone, | |
| 170 &gCallbacks, closure); | |
| 171 } | |
| 172 | |
| 173 bool | |
| 174 WriteStructuredClone(JSContext* aCx, JS::Handle<JS::Value> aSource, | |
| 175 JSAutoStructuredCloneBuffer& aBuffer, | |
| 176 StructuredCloneClosure& aClosure) | |
| 177 { | |
| 178 return aBuffer.write(aCx, aSource, &gCallbacks, &aClosure); | |
| 179 } | |
| 180 | |
| 181 } // namespace dom | |
| 182 } // namespace mozilla |
