/platform/external/webkit/WebCore/bindings/v8/custom/V8HTMLAudioElementConstructor.cpp

 1/*
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 9 * notice, this list of conditions and the following disclaimer.
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12 * in the documentation and/or other materials provided with the
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17 * 
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19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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29 */
30
31#include "config.h"
32#include "V8HTMLAudioElementConstructor.h"
33
34#include "HTMLAudioElement.h"
35#include "Document.h"
36#include "Frame.h"
37#include "HTMLNames.h"
38#include "V8Binding.h"
39#include "V8Document.h"
40#include "V8HTMLAudioElement.h"
41#include "V8Proxy.h"
42
43#include <wtf/RefPtr.h>
44
45namespace WebCore {
46
47static v8::Handle<v8::Value> v8HTMLAudioElementConstructorCallback(const v8::Arguments& args)
48{
49    INC_STATS("DOM.HTMLAudioElement.Contructor");
50
51    if (!args.IsConstructCall())
52        return throwError("DOM object constructor cannot be called as a function.");
53
54    Frame* frame = V8Proxy::retrieveFrameForCurrentContext();
55    if (!frame)
56        return throwError("Audio constructor associated frame is unavailable", V8Proxy::ReferenceError);
57
58    Document* document = frame->document();
59    if (!document)
60        return throwError("Audio constructor associated document is unavailable", V8Proxy::ReferenceError);
61
62    // Make sure the document is added to the DOM Node map. Otherwise, the HTMLAudioElement instance
63    // may end up being the only node in the map and get garbage-ccollected prematurely.
64    toV8(document);
65
66    RefPtr<HTMLAudioElement> audio = new HTMLAudioElement(HTMLNames::audioTag, document);
67    audio->setAutobuffer(true);
68    if (args.Length() > 0) {
69        audio->setSrc(toWebCoreString(args[0]));
70        audio->scheduleLoad();
71    }
72
73    V8DOMWrapper::setDOMWrapper(args.Holder(), V8ClassIndex::ToInt(V8ClassIndex::AUDIO), audio.get());
74    audio->ref();
75    V8DOMWrapper::setJSWrapperForDOMNode(audio.get(), v8::Persistent<v8::Object>::New(args.Holder()));
76    return args.Holder();
77}
78
79v8::Persistent<v8::FunctionTemplate> V8HTMLAudioElementConstructor::GetTemplate()
80{
81    static v8::Persistent<v8::FunctionTemplate> cachedTemplate;
82    if (!cachedTemplate.IsEmpty())
83        return cachedTemplate;
84
85    v8::HandleScope scope;
86    v8::Local<v8::FunctionTemplate> result = v8::FunctionTemplate::New(v8HTMLAudioElementConstructorCallback);
87
88    v8::Local<v8::ObjectTemplate> instance = result->InstanceTemplate();
89    instance->SetInternalFieldCount(V8HTMLAudioElement::internalFieldCount);
90    result->SetClassName(v8::String::New("HTMLAudioElement"));
91    result->Inherit(V8HTMLAudioElement::GetTemplate());
92
93    cachedTemplate = v8::Persistent<v8::FunctionTemplate>::New(result);
94    return cachedTemplate;
95}
96
97} // namespace WebCore