1/*
2 * Copyright (C) 2009, 2010 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 "V8HTMLImageElementConstructor.h"
33
34#include "HTMLImageElement.h"
35#include "Document.h"
36#include "Frame.h"
37#include "HTMLNames.h"
38#include "V8Binding.h"
39#include "V8Document.h"
40#include "V8HTMLImageElement.h"
41#include "V8Proxy.h"
42
43#include <wtf/RefPtr.h>
44
45namespace WebCore {
46
47  WrapperTypeInfo V8HTMLImageElementConstructor::info = { V8HTMLImageElementConstructor::GetTemplate, 0, 0, 0 };
48
49static v8::Handle<v8::Value> v8HTMLImageElementConstructorCallback(const v8::Arguments& args)
50{
51    INC_STATS("DOM.HTMLImageElement.Contructor");
52
53    if (!args.IsConstructCall())
54        return throwError("DOM object constructor cannot be called as a function.");
55
56    Frame* frame = V8Proxy::retrieveFrameForCurrentContext();
57    if (!frame)
58        return throwError("Image constructor associated frame is unavailable", V8Proxy::ReferenceError);
59
60    Document* document = frame->document();
61    if (!document)
62        return throwError("Image constructor associated document is unavailable", V8Proxy::ReferenceError);
63
64    // Make sure the document is added to the DOM Node map. Otherwise, the HTMLImageElement instance
65    // may end up being the only node in the map and get garbage-ccollected prematurely.
66    // FIXME: The correct way to do this would be to make HTMLImageElement derive from
67    // ActiveDOMObject and use its interface to keep its wrapper alive. Then we would
68    // remove this code and the special case in isObservableThroughDOM.
69    toV8(document);
70
71    int width;
72    int height;
73    int* optionalWidth = 0;
74    int* optionalHeight = 0;
75    if (args.Length() > 0) {
76        width = toInt32(args[0]);
77        optionalWidth = &width;
78    }
79    if (args.Length() > 1) {
80        height = toInt32(args[1]);
81        optionalHeight = &height;
82    }
83
84    RefPtr<HTMLImageElement> image = HTMLImageElement::createForJSConstructor(document, optionalWidth, optionalHeight);
85    V8DOMWrapper::setDOMWrapper(args.Holder(), &V8HTMLImageElementConstructor::info, image.get());
86    image->ref();
87    V8DOMWrapper::setJSWrapperForDOMNode(image.get(), v8::Persistent<v8::Object>::New(args.Holder()));
88    return args.Holder();
89}
90
91v8::Persistent<v8::FunctionTemplate> V8HTMLImageElementConstructor::GetTemplate()
92{
93    static v8::Persistent<v8::FunctionTemplate> cachedTemplate;
94    if (!cachedTemplate.IsEmpty())
95        return cachedTemplate;
96
97    v8::HandleScope scope;
98    v8::Local<v8::FunctionTemplate> result = v8::FunctionTemplate::New(v8HTMLImageElementConstructorCallback);
99
100    v8::Local<v8::ObjectTemplate> instance = result->InstanceTemplate();
101    instance->SetInternalFieldCount(V8HTMLImageElement::internalFieldCount);
102    result->SetClassName(v8::String::New("HTMLImageElement"));
103    result->Inherit(V8HTMLImageElement::GetTemplate());
104
105    cachedTemplate = v8::Persistent<v8::FunctionTemplate>::New(result);
106    return cachedTemplate;
107}
108
109} // namespace WebCore
110