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1 /*
2  * Copyright (C) 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 "V8HTMLCollection.h"
33 
34 #include "HTMLCollection.h"
35 #include "V8Binding.h"
36 #include "V8HTMLAllCollection.h"
37 #include "V8NamedNodesCollection.h"
38 #include "V8Node.h"
39 #include "V8NodeList.h"
40 #include "V8Proxy.h"
41 
42 namespace WebCore {
43 
getNamedItems(HTMLCollection * collection,AtomicString name)44 static v8::Handle<v8::Value> getNamedItems(HTMLCollection* collection, AtomicString name)
45 {
46     Vector<RefPtr<Node> > namedItems;
47     collection->namedItems(name, namedItems);
48 
49     if (!namedItems.size())
50         return v8::Handle<v8::Value>();
51 
52     if (namedItems.size() == 1)
53         return toV8(namedItems.at(0).release());
54 
55     return toV8(V8NamedNodesCollection::create(namedItems));
56 }
57 
getItem(HTMLCollection * collection,v8::Handle<v8::Value> argument)58 static v8::Handle<v8::Value> getItem(HTMLCollection* collection, v8::Handle<v8::Value> argument)
59 {
60     v8::Local<v8::Uint32> index = argument->ToArrayIndex();
61     if (index.IsEmpty()) {
62         v8::Local<v8::String> asString = argument->ToString();
63         if (asString.IsEmpty())
64             return v8::Handle<v8::Value>();
65         v8::Handle<v8::Value> result = getNamedItems(collection, toWebCoreString(asString));
66 
67         if (result.IsEmpty())
68             return v8::Undefined();
69 
70         return result;
71     }
72 
73     RefPtr<Node> result = collection->item(index->Uint32Value());
74     return toV8(result.release());
75 }
76 
namedPropertyGetter(v8::Local<v8::String> name,const v8::AccessorInfo & info)77 v8::Handle<v8::Value> V8HTMLCollection::namedPropertyGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
78 {
79     INC_STATS("DOM.HTMLCollection.NamedPropertyGetter");
80     // Search the prototype chain first.
81     v8::Handle<v8::Value> value = info.Holder()->GetRealNamedPropertyInPrototypeChain(name);
82 
83     if (!value.IsEmpty())
84         return value;
85 
86     // Search local callback properties next to find IDL defined
87     // properties.
88     if (info.Holder()->HasRealNamedCallbackProperty(name))
89         return v8::Handle<v8::Value>();
90 
91     // Finally, search the DOM structure.
92     HTMLCollection* imp = V8HTMLCollection::toNative(info.Holder());
93     return getNamedItems(imp, v8StringToAtomicWebCoreString(name));
94 }
95 
itemCallback(const v8::Arguments & args)96 v8::Handle<v8::Value> V8HTMLCollection::itemCallback(const v8::Arguments& args)
97 {
98     INC_STATS("DOM.HTMLCollection.item()");
99     HTMLCollection* imp = V8HTMLCollection::toNative(args.Holder());
100     return getItem(imp, args[0]);
101 }
102 
namedItemCallback(const v8::Arguments & args)103 v8::Handle<v8::Value> V8HTMLCollection::namedItemCallback(const v8::Arguments& args)
104 {
105     INC_STATS("DOM.HTMLCollection.namedItem()");
106     HTMLCollection* imp = V8HTMLCollection::toNative(args.Holder());
107     v8::Handle<v8::Value> result = getNamedItems(imp, toWebCoreString(args[0]));
108 
109     if (result.IsEmpty())
110         return v8::Undefined();
111 
112     return result;
113 }
114 
callAsFunctionCallback(const v8::Arguments & args)115 v8::Handle<v8::Value> V8HTMLCollection::callAsFunctionCallback(const v8::Arguments& args)
116 {
117     INC_STATS("DOM.HTMLCollection.callAsFunction()");
118     if (args.Length() < 1)
119         return v8::Undefined();
120 
121     HTMLCollection* imp = V8HTMLCollection::toNative(args.Holder());
122 
123     if (args.Length() == 1)
124         return getItem(imp, args[0]);
125 
126     // If there is a second argument it is the index of the item we want.
127     String name = toWebCoreString(args[0]);
128     v8::Local<v8::Uint32> index = args[1]->ToArrayIndex();
129     if (index.IsEmpty())
130         return v8::Undefined();
131 
132     unsigned current = index->Uint32Value();
133     Node* node = imp->namedItem(name);
134     while (node) {
135         if (!current)
136             return toV8(node);
137 
138         node = imp->nextNamedItem(name);
139         current--;
140     }
141 
142     return v8::Undefined();
143 }
144 
toV8(HTMLCollection * impl)145 v8::Handle<v8::Value> toV8(HTMLCollection* impl)
146 {
147     if (impl->type() == DocAll)
148         return toV8(static_cast<HTMLAllCollection*>(impl));
149     return V8HTMLCollection::wrap(impl);
150 }
151 
152 } // namespace WebCore
153