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