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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 "bindings/core/v8/V8HTMLAllCollection.h"
     33 
     34 #include "bindings/core/v8/V8Binding.h"
     35 #include "bindings/core/v8/V8Element.h"
     36 #include "bindings/core/v8/V8NodeList.h"
     37 #include "core/dom/StaticNodeList.h"
     38 #include "core/frame/UseCounter.h"
     39 #include "core/html/HTMLAllCollection.h"
     40 
     41 namespace blink {
     42 
     43 template<class CallbackInfo>
     44 static v8::Handle<v8::Value> getNamedItems(HTMLAllCollection* collection, AtomicString name, const CallbackInfo& info)
     45 {
     46     WillBeHeapVector<RefPtrWillBeMember<Element> > namedItems;
     47     collection->namedItems(name, namedItems);
     48 
     49     if (!namedItems.size())
     50         return v8Undefined();
     51 
     52     if (namedItems.size() == 1)
     53         return toV8(namedItems.at(0).release(), info.Holder(), info.GetIsolate());
     54 
     55     // FIXME: HTML5 specification says this should be a HTMLCollection.
     56     // http://www.whatwg.org/specs/web-apps/current-work/multipage/common-dom-interfaces.html#htmlallcollection
     57     //
     58     // FIXME: Oilpan: explicitly convert adopt()'s result so as to
     59     // disambiguate the (implicit) conversion of its
     60     // PassRefPtrWillBeRawPtr<StaticElementList> result -- the
     61     // other toV8() overload that introduces the ambiguity is
     62     // toV8(NodeList*, ...).
     63     //
     64     // When adopt() no longer uses transition types, the conversion
     65     // can be removed.
     66     return toV8(PassRefPtrWillBeRawPtr<NodeList>(StaticElementList::adopt(namedItems)), info.Holder(), info.GetIsolate());
     67 }
     68 
     69 template<class CallbackInfo>
     70 static v8::Handle<v8::Value> getItem(HTMLAllCollection* collection, v8::Handle<v8::Value> argument, const CallbackInfo& info)
     71 {
     72     v8::Local<v8::Uint32> index = argument->ToArrayIndex();
     73     if (index.IsEmpty()) {
     74         TOSTRING_DEFAULT(V8StringResource<>, name, argument, v8::Undefined(info.GetIsolate()));
     75         v8::Handle<v8::Value> result = getNamedItems(collection, name, info);
     76 
     77         if (result.IsEmpty())
     78             return v8::Undefined(info.GetIsolate());
     79 
     80         return result;
     81     }
     82 
     83     RefPtrWillBeRawPtr<Element> result = collection->item(index->Uint32Value());
     84     return toV8(result.release(), info.Holder(), info.GetIsolate());
     85 }
     86 
     87 void V8HTMLAllCollection::itemMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
     88 {
     89     HTMLAllCollection* impl = V8HTMLAllCollection::toImpl(info.Holder());
     90     v8SetReturnValue(info, getItem(impl, info[0], info));
     91 }
     92 
     93 void V8HTMLAllCollection::legacyCallCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
     94 {
     95     if (info.Length() < 1)
     96         return;
     97 
     98     HTMLAllCollection* impl = V8HTMLAllCollection::toImpl(info.Holder());
     99     Node& ownerNode = impl->ownerNode();
    100 
    101     UseCounter::count(ownerNode.document(), UseCounter::DocumentAllLegacyCall);
    102 
    103     if (info.Length() == 1) {
    104         v8SetReturnValue(info, getItem(impl, info[0], info));
    105         return;
    106     }
    107 
    108     // If there is a second argument it is the index of the item we want.
    109     TOSTRING_VOID(V8StringResource<>, name, info[0]);
    110     v8::Local<v8::Uint32> index = info[1]->ToArrayIndex();
    111     if (index.IsEmpty())
    112         return;
    113 
    114     if (Node* node = impl->namedItemWithIndex(name, index->Uint32Value())) {
    115         v8SetReturnValueFast(info, node, impl);
    116         return;
    117     }
    118 }
    119 
    120 } // namespace blink
    121