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      1 /*
      2  * Copyright (C) 2009 Apple 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
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "JSHTMLAllCollection.h"
     28 
     29 #include "HTMLAllCollection.h"
     30 #include "JSDOMBinding.h"
     31 #include "JSHTMLAllCollection.h"
     32 #include "JSNode.h"
     33 #include "JSNodeList.h"
     34 #include "Node.h"
     35 #include "StaticNodeList.h"
     36 #include <runtime/JSValue.h>
     37 #include <wtf/Vector.h>
     38 #include <wtf/text/AtomicString.h>
     39 
     40 using namespace JSC;
     41 
     42 namespace WebCore {
     43 
     44 static JSValue getNamedItems(ExecState* exec, JSHTMLAllCollection* collection, const Identifier& propertyName)
     45 {
     46     Vector<RefPtr<Node> > namedItems;
     47     collection->impl()->namedItems(identifierToAtomicString(propertyName), namedItems);
     48 
     49     if (namedItems.isEmpty())
     50         return jsUndefined();
     51     if (namedItems.size() == 1)
     52         return toJS(exec, collection->globalObject(), namedItems[0].get());
     53 
     54     // FIXME: HTML5 specifies that this should be a DynamicNodeList.
     55     // FIXME: HTML5 specifies that non-HTMLOptionsCollection collections should return
     56     // the first matching item instead of a NodeList.
     57     return toJS(exec, collection->globalObject(), StaticNodeList::adopt(namedItems).get());
     58 }
     59 
     60 // HTMLCollections are strange objects, they support both get and call,
     61 // so that document.forms.item(0) and document.forms(0) both work.
     62 static EncodedJSValue JSC_HOST_CALL callHTMLAllCollection(ExecState* exec)
     63 {
     64     if (exec->argumentCount() < 1)
     65         return JSValue::encode(jsUndefined());
     66 
     67     // Do not use thisObj here. It can be the JSHTMLDocument, in the document.forms(i) case.
     68     JSHTMLAllCollection* jsCollection = static_cast<JSHTMLAllCollection*>(exec->callee());
     69     HTMLAllCollection* collection = static_cast<HTMLAllCollection*>(jsCollection->impl());
     70 
     71     // Also, do we need the TypeError test here ?
     72 
     73     if (exec->argumentCount() == 1) {
     74         // Support for document.all(<index>) etc.
     75         bool ok;
     76         UString string = exec->argument(0).toString(exec);
     77         unsigned index = Identifier::toUInt32(string, ok);
     78         if (ok)
     79             return JSValue::encode(toJS(exec, jsCollection->globalObject(), collection->item(index)));
     80 
     81         // Support for document.images('<name>') etc.
     82         return JSValue::encode(getNamedItems(exec, jsCollection, Identifier(exec, string)));
     83     }
     84 
     85     // The second arg, if set, is the index of the item we want
     86     bool ok;
     87     UString string = exec->argument(0).toString(exec);
     88     unsigned index = Identifier::toUInt32(exec->argument(1).toString(exec), ok);
     89     if (ok) {
     90         String pstr = ustringToString(string);
     91         Node* node = collection->namedItem(pstr);
     92         while (node) {
     93             if (!index)
     94                 return JSValue::encode(toJS(exec, jsCollection->globalObject(), node));
     95             node = collection->nextNamedItem(pstr);
     96             --index;
     97         }
     98     }
     99 
    100     return JSValue::encode(jsUndefined());
    101 }
    102 
    103 CallType JSHTMLAllCollection::getCallData(CallData& callData)
    104 {
    105     callData.native.function = callHTMLAllCollection;
    106     return CallTypeHost;
    107 }
    108 
    109 bool JSHTMLAllCollection::canGetItemsForName(ExecState*, HTMLAllCollection* collection, const Identifier& propertyName)
    110 {
    111     Vector<RefPtr<Node> > namedItems;
    112     collection->namedItems(identifierToAtomicString(propertyName), namedItems);
    113     return !namedItems.isEmpty();
    114 }
    115 
    116 JSValue JSHTMLAllCollection::nameGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
    117 {
    118     JSHTMLAllCollection* thisObj = static_cast<JSHTMLAllCollection*>(asObject(slotBase));
    119     return getNamedItems(exec, thisObj, propertyName);
    120 }
    121 
    122 JSValue JSHTMLAllCollection::item(ExecState* exec)
    123 {
    124     bool ok;
    125     uint32_t index = Identifier::toUInt32(exec->argument(0).toString(exec), ok);
    126     if (ok)
    127         return toJS(exec, globalObject(), impl()->item(index));
    128     return getNamedItems(exec, this, Identifier(exec, exec->argument(0).toString(exec)));
    129 }
    130 
    131 JSValue JSHTMLAllCollection::namedItem(ExecState* exec)
    132 {
    133     return getNamedItems(exec, this, Identifier(exec, exec->argument(0).toString(exec)));
    134 }
    135 
    136 } // namespace WebCore
    137