1 /*
2 * Copyright (C) 2008, 2009 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "V8Utilities.h"
33
34 #include <v8.h>
35
36 #include "Document.h"
37 #include "Frame.h"
38 #include "ScriptExecutionContext.h"
39 #include "ScriptState.h"
40 #include "V8Binding.h"
41 #include "V8BindingState.h"
42 #include "V8Proxy.h"
43 #include "WorkerContext.h"
44 #include "WorkerContextExecutionProxy.h"
45
46 #include <wtf/Assertions.h>
47 #include "Frame.h"
48
49 namespace WebCore {
50
51 // Use an array to hold dependents. It works like a ref-counted scheme.
52 // A value can be added more than once to the DOM object.
createHiddenDependency(v8::Handle<v8::Object> object,v8::Local<v8::Value> value,int cacheIndex)53 void createHiddenDependency(v8::Handle<v8::Object> object, v8::Local<v8::Value> value, int cacheIndex)
54 {
55 v8::Local<v8::Value> cache = object->GetInternalField(cacheIndex);
56 if (cache->IsNull() || cache->IsUndefined()) {
57 cache = v8::Array::New();
58 object->SetInternalField(cacheIndex, cache);
59 }
60
61 v8::Local<v8::Array> cacheArray = v8::Local<v8::Array>::Cast(cache);
62 cacheArray->Set(v8::Integer::New(cacheArray->Length()), value);
63 }
64
removeHiddenDependency(v8::Handle<v8::Object> object,v8::Local<v8::Value> value,int cacheIndex)65 void removeHiddenDependency(v8::Handle<v8::Object> object, v8::Local<v8::Value> value, int cacheIndex)
66 {
67 v8::Local<v8::Value> cache = object->GetInternalField(cacheIndex);
68 if (!cache->IsArray())
69 return;
70 v8::Local<v8::Array> cacheArray = v8::Local<v8::Array>::Cast(cache);
71 for (int i = cacheArray->Length() - 1; i >= 0; --i) {
72 v8::Local<v8::Value> cached = cacheArray->Get(v8::Integer::New(i));
73 if (cached->StrictEquals(value)) {
74 cacheArray->Delete(i);
75 return;
76 }
77 }
78 }
79
transferHiddenDependency(v8::Handle<v8::Object> object,EventListener * oldValue,v8::Local<v8::Value> newValue,int cacheIndex)80 void transferHiddenDependency(v8::Handle<v8::Object> object,
81 EventListener* oldValue,
82 v8::Local<v8::Value> newValue,
83 int cacheIndex)
84 {
85 if (oldValue) {
86 V8AbstractEventListener* oldListener = V8AbstractEventListener::cast(oldValue);
87 if (oldListener) {
88 v8::Local<v8::Object> oldListenerObject = oldListener->getExistingListenerObject();
89 if (!oldListenerObject.IsEmpty())
90 removeHiddenDependency(object, oldListenerObject, cacheIndex);
91 }
92 }
93 if (!newValue->IsNull() && !newValue->IsUndefined())
94 createHiddenDependency(object, newValue, cacheIndex);
95 }
96
processingUserGesture()97 bool processingUserGesture()
98 {
99 return V8BindingState::Only()->processingUserGesture();
100 }
101
callingOrEnteredFrame()102 Frame* callingOrEnteredFrame()
103 {
104 return V8BindingState::Only()->activeFrame();
105 }
106
shouldAllowNavigation(Frame * frame)107 bool shouldAllowNavigation(Frame* frame)
108 {
109 return V8BindingSecurity::shouldAllowNavigation(V8BindingState::Only(), frame);
110 }
111
completeURL(const String & relativeURL)112 KURL completeURL(const String& relativeURL)
113 {
114 return completeURL(V8BindingState::Only(), relativeURL);
115 }
116
getScriptExecutionContext()117 ScriptExecutionContext* getScriptExecutionContext()
118 {
119 #if ENABLE(WORKERS)
120 if (WorkerScriptController* controller = WorkerScriptController::controllerForContext())
121 return controller->workerContext();
122 #endif
123
124 if (Frame* frame = V8Proxy::retrieveFrameForCurrentContext())
125 return frame->document()->scriptExecutionContext();
126
127 return 0;
128 }
129
throwTypeMismatchException()130 void throwTypeMismatchException()
131 {
132 V8Proxy::throwError(V8Proxy::GeneralError, "TYPE_MISMATCH_ERR: DOM Exception 17");
133 }
134
135 } // namespace WebCore
136