1// Copyright (c) 2008, Google Inc.
2// All rights reserved.
3//
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5// modification, are permitted provided that the following conditions are
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7//
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12// in the documentation and/or other materials provided with the
13// distribution.
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17//
18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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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
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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/v8/custom/V8CustomXPathNSResolver.h"
32
33#include "bindings/v8/ScriptController.h"
34#include "bindings/v8/V8Binding.h"
35#include "bindings/v8/V8Utilities.h"
36#include "core/dom/ExecutionContext.h"
37#include "core/inspector/ScriptCallStack.h"
38#include "core/frame/DOMWindow.h"
39#include "core/frame/Frame.h"
40#include "core/page/Page.h"
41#include "core/page/PageConsole.h"
42#include "wtf/text/WTFString.h"
43
44namespace WebCore {
45
46PassRefPtr<V8CustomXPathNSResolver> V8CustomXPathNSResolver::create(v8::Handle<v8::Object> resolver, v8::Isolate* isolate)
47{
48    return adoptRef(new V8CustomXPathNSResolver(resolver, isolate));
49}
50
51V8CustomXPathNSResolver::V8CustomXPathNSResolver(v8::Handle<v8::Object> resolver, v8::Isolate* isolate)
52    : m_resolver(resolver)
53    , m_isolate(isolate)
54{
55}
56
57V8CustomXPathNSResolver::~V8CustomXPathNSResolver()
58{
59}
60
61AtomicString V8CustomXPathNSResolver::lookupNamespaceURI(const String& prefix)
62{
63    v8::Handle<v8::Function> lookupNamespaceURIFunc;
64    v8::Handle<v8::String> lookupNamespaceURIName = v8AtomicString(m_isolate, "lookupNamespaceURI");
65
66    // Check if the resolver has a function property named lookupNamespaceURI.
67    if (m_resolver->Has(lookupNamespaceURIName)) {
68        v8::Handle<v8::Value> lookupNamespaceURI = m_resolver->Get(lookupNamespaceURIName);
69        if (lookupNamespaceURI->IsFunction())
70            lookupNamespaceURIFunc = v8::Handle<v8::Function>::Cast(lookupNamespaceURI);
71    }
72
73    if (lookupNamespaceURIFunc.IsEmpty() && !m_resolver->IsFunction()) {
74        Frame* frame = activeDOMWindow()->frame();
75        if (frame && frame->page())
76            frame->page()->console().addMessage(JSMessageSource, ErrorMessageLevel, "XPathNSResolver does not have a lookupNamespaceURI method.");
77        return nullAtom;
78    }
79
80    // Catch exceptions from calling the namespace resolver.
81    v8::TryCatch tryCatch;
82    tryCatch.SetVerbose(true); // Print exceptions to console.
83
84    const int argc = 1;
85    v8::Handle<v8::Value> argv[argc] = { v8String(m_isolate, prefix) };
86    v8::Handle<v8::Function> function = lookupNamespaceURIFunc.IsEmpty() ? v8::Handle<v8::Function>::Cast(m_resolver) : lookupNamespaceURIFunc;
87
88    v8::Handle<v8::Value> retval = ScriptController::callFunction(activeExecutionContext(), function, m_resolver, argc, argv, m_isolate);
89
90    // Eat exceptions from namespace resolver and return an empty string. This will most likely cause NamespaceError.
91    if (tryCatch.HasCaught())
92        return nullAtom;
93
94    V8TRYCATCH_FOR_V8STRINGRESOURCE_RETURN(V8StringResource<WithNullCheck>, returnString, retval, nullAtom);
95    return returnString;
96}
97
98} // namespace WebCore
99