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 "V8CustomBinding.h"
37 #include "V8Proxy.h"
38
39 #include <wtf/Assertions.h>
40 #include "Frame.h"
41
42 namespace WebCore {
43
44 // Use an array to hold dependents. It works like a ref-counted scheme.
45 // A value can be added more than once to the DOM object.
createHiddenDependency(v8::Local<v8::Object> object,v8::Local<v8::Value> value,int cacheIndex)46 void createHiddenDependency(v8::Local<v8::Object> object, v8::Local<v8::Value> value, int cacheIndex)
47 {
48 v8::Local<v8::Value> cache = object->GetInternalField(cacheIndex);
49 if (cache->IsNull() || cache->IsUndefined()) {
50 cache = v8::Array::New();
51 object->SetInternalField(cacheIndex, cache);
52 }
53
54 v8::Local<v8::Array> cacheArray = v8::Local<v8::Array>::Cast(cache);
55 cacheArray->Set(v8::Integer::New(cacheArray->Length()), value);
56 }
57
removeHiddenDependency(v8::Local<v8::Object> object,v8::Local<v8::Value> value,int cacheIndex)58 void removeHiddenDependency(v8::Local<v8::Object> object, v8::Local<v8::Value> value, int cacheIndex)
59 {
60 v8::Local<v8::Value> cache = object->GetInternalField(cacheIndex);
61 if (!cache->IsArray())
62 return;
63 v8::Local<v8::Array> cacheArray = v8::Local<v8::Array>::Cast(cache);
64 for (int i = cacheArray->Length() - 1; i >= 0; --i) {
65 v8::Local<v8::Value> cached = cacheArray->Get(v8::Integer::New(i));
66 if (cached->StrictEquals(value)) {
67 cacheArray->Delete(i);
68 return;
69 }
70 }
71 }
72
processingUserGesture()73 bool processingUserGesture()
74 {
75 Frame* frame = V8Proxy::retrieveFrameForEnteredContext();
76 return frame && frame->script()->processingUserGesture();
77 }
78
shouldAllowNavigation(Frame * frame)79 bool shouldAllowNavigation(Frame* frame)
80 {
81 Frame* callingFrame = V8Proxy::retrieveFrameForCallingContext();
82 return callingFrame && callingFrame->loader()->shouldAllowNavigation(frame);
83 }
84
completeURL(const String & relativeURL)85 KURL completeURL(const String& relativeURL)
86 {
87 // For histoical reasons, we need to complete the URL using the dynamic frame.
88 Frame* frame = V8Proxy::retrieveFrameForEnteredContext();
89 if (!frame)
90 return KURL();
91 return frame->loader()->completeURL(relativeURL);
92 }
93
navigateIfAllowed(Frame * frame,const KURL & url,bool lockHistory,bool lockBackForwardList)94 void navigateIfAllowed(Frame* frame, const KURL& url, bool lockHistory, bool lockBackForwardList)
95 {
96 Frame* callingFrame = V8Proxy::retrieveFrameForCallingContext();
97 if (!callingFrame)
98 return;
99
100 if (!protocolIsJavaScript(url) || ScriptController::isSafeScript(frame))
101 frame->loader()->scheduleLocationChange(url.string(), callingFrame->loader()->outgoingReferrer(), lockHistory, lockBackForwardList, processingUserGesture());
102 }
103
104 } // namespace WebCore
105