1 // Copyright (c) 2008, Google Inc.
2 // 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 #include "config.h"
31 #include "bindings/core/v8/custom/V8CustomXPathNSResolver.h"
32
33 #include "bindings/core/v8/ScriptController.h"
34 #include "bindings/core/v8/V8Binding.h"
35 #include "core/dom/ExecutionContext.h"
36 #include "core/frame/FrameConsole.h"
37 #include "core/frame/FrameHost.h"
38 #include "core/frame/LocalDOMWindow.h"
39 #include "core/frame/LocalFrame.h"
40 #include "core/inspector/ConsoleMessage.h"
41 #include "core/inspector/ScriptCallStack.h"
42 #include "wtf/text/WTFString.h"
43
44 namespace blink {
45
create(v8::Handle<v8::Object> resolver,v8::Isolate * isolate)46 PassRefPtrWillBeRawPtr<V8CustomXPathNSResolver> V8CustomXPathNSResolver::create(v8::Handle<v8::Object> resolver, v8::Isolate* isolate)
47 {
48 return adoptRefWillBeNoop(new V8CustomXPathNSResolver(resolver, isolate));
49 }
50
V8CustomXPathNSResolver(v8::Handle<v8::Object> resolver,v8::Isolate * isolate)51 V8CustomXPathNSResolver::V8CustomXPathNSResolver(v8::Handle<v8::Object> resolver, v8::Isolate* isolate)
52 : m_resolver(resolver)
53 , m_isolate(isolate)
54 {
55 }
56
lookupNamespaceURI(const String & prefix)57 AtomicString V8CustomXPathNSResolver::lookupNamespaceURI(const String& prefix)
58 {
59 v8::Handle<v8::Function> lookupNamespaceURIFunc;
60 v8::Handle<v8::String> lookupNamespaceURIName = v8AtomicString(m_isolate, "lookupNamespaceURI");
61
62 // Check if the resolver has a function property named lookupNamespaceURI.
63 if (m_resolver->Has(lookupNamespaceURIName)) {
64 v8::Handle<v8::Value> lookupNamespaceURI = m_resolver->Get(lookupNamespaceURIName);
65 if (lookupNamespaceURI->IsFunction())
66 lookupNamespaceURIFunc = v8::Handle<v8::Function>::Cast(lookupNamespaceURI);
67 }
68
69 if (lookupNamespaceURIFunc.IsEmpty() && !m_resolver->IsFunction()) {
70 LocalFrame* frame = callingDOMWindow(m_isolate)->frame();
71 if (frame && frame->host())
72 frame->console().addMessage(ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, "XPathNSResolver does not have a lookupNamespaceURI method."));
73 return nullAtom;
74 }
75
76 // Catch exceptions from calling the namespace resolver.
77 v8::TryCatch tryCatch;
78 tryCatch.SetVerbose(true); // Print exceptions to console.
79
80 const int argc = 1;
81 v8::Handle<v8::Value> argv[argc] = { v8String(m_isolate, prefix) };
82 v8::Handle<v8::Function> function = lookupNamespaceURIFunc.IsEmpty() ? v8::Handle<v8::Function>::Cast(m_resolver) : lookupNamespaceURIFunc;
83
84 v8::Handle<v8::Value> retval = ScriptController::callFunction(callingExecutionContext(m_isolate), function, m_resolver, argc, argv, m_isolate);
85
86 // Eat exceptions from namespace resolver and return an empty string. This will most likely cause NamespaceError.
87 if (tryCatch.HasCaught())
88 return nullAtom;
89
90 TOSTRING_DEFAULT(V8StringResource<TreatNullAsNullString>, returnString, retval, nullAtom);
91 return returnString;
92 }
93
trace(Visitor * visitor)94 void V8CustomXPathNSResolver::trace(Visitor* visitor)
95 {
96 XPathNSResolver::trace(visitor);
97 }
98
99 } // namespace blink
100