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      1 /*
      2  * Copyright (C) 2003, 2008 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 COMPUTER, 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 COMPUTER, 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 "runtime_array.h"
     28 
     29 #include <runtime/ArrayPrototype.h>
     30 #include <runtime/Error.h>
     31 #include <runtime/PropertyNameArray.h>
     32 #include "JSDOMBinding.h"
     33 
     34 using namespace WebCore;
     35 
     36 namespace JSC {
     37 
     38 const ClassInfo RuntimeArray::s_info = { "RuntimeArray", &JSArray::info, 0, 0 };
     39 
     40 RuntimeArray::RuntimeArray(ExecState* exec, Bindings::Array* array)
     41     // FIXME: deprecatedGetDOMStructure uses the prototype off of the wrong global object
     42     // We need to pass in the right global object for "array".
     43     : JSObject(deprecatedGetDOMStructure<RuntimeArray>(exec))
     44     , _array(array)
     45 {
     46 }
     47 
     48 JSValue RuntimeArray::lengthGetter(ExecState* exec, const Identifier&, const PropertySlot& slot)
     49 {
     50     RuntimeArray* thisObj = static_cast<RuntimeArray*>(asObject(slot.slotBase()));
     51     return jsNumber(exec, thisObj->getLength());
     52 }
     53 
     54 JSValue RuntimeArray::indexGetter(ExecState* exec, const Identifier&, const PropertySlot& slot)
     55 {
     56     RuntimeArray* thisObj = static_cast<RuntimeArray*>(asObject(slot.slotBase()));
     57     return thisObj->getConcreteArray()->valueAt(exec, slot.index());
     58 }
     59 
     60 void RuntimeArray::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
     61 {
     62     unsigned length = getLength();
     63     for (unsigned i = 0; i < length; ++i)
     64         propertyNames.add(Identifier::from(exec, i));
     65 
     66     if (mode == IncludeDontEnumProperties)
     67         propertyNames.add(exec->propertyNames().length);
     68 
     69     JSObject::getOwnPropertyNames(exec, propertyNames, mode);
     70 }
     71 
     72 bool RuntimeArray::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
     73 {
     74     if (propertyName == exec->propertyNames().length) {
     75         slot.setCustom(this, lengthGetter);
     76         return true;
     77     }
     78 
     79     bool ok;
     80     unsigned index = propertyName.toArrayIndex(&ok);
     81     if (ok) {
     82         if (index < getLength()) {
     83             slot.setCustomIndex(this, index, indexGetter);
     84             return true;
     85         }
     86     }
     87 
     88     return JSObject::getOwnPropertySlot(exec, propertyName, slot);
     89 }
     90 
     91 bool RuntimeArray::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
     92 {
     93     if (propertyName == exec->propertyNames().length) {
     94         PropertySlot slot;
     95         slot.setCustom(this, lengthGetter);
     96         descriptor.setDescriptor(slot.getValue(exec, propertyName), ReadOnly | DontDelete | DontEnum);
     97         return true;
     98     }
     99 
    100     bool ok;
    101     unsigned index = propertyName.toArrayIndex(&ok);
    102     if (ok) {
    103         if (index < getLength()) {
    104             PropertySlot slot;
    105             slot.setCustomIndex(this, index, indexGetter);
    106             descriptor.setDescriptor(slot.getValue(exec, propertyName), DontDelete | DontEnum);
    107             return true;
    108         }
    109     }
    110 
    111     return JSObject::getOwnPropertyDescriptor(exec, propertyName, descriptor);
    112 }
    113 
    114 bool RuntimeArray::getOwnPropertySlot(ExecState *exec, unsigned index, PropertySlot& slot)
    115 {
    116     if (index < getLength()) {
    117         slot.setCustomIndex(this, index, indexGetter);
    118         return true;
    119     }
    120 
    121     return JSObject::getOwnPropertySlot(exec, index, slot);
    122 }
    123 
    124 void RuntimeArray::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
    125 {
    126     if (propertyName == exec->propertyNames().length) {
    127         throwError(exec, RangeError);
    128         return;
    129     }
    130 
    131     bool ok;
    132     unsigned index = propertyName.toArrayIndex(&ok);
    133     if (ok) {
    134         getConcreteArray()->setValueAt(exec, index, value);
    135         return;
    136     }
    137 
    138     JSObject::put(exec, propertyName, value, slot);
    139 }
    140 
    141 void RuntimeArray::put(ExecState* exec, unsigned index, JSValue value)
    142 {
    143     if (index >= getLength()) {
    144         throwError(exec, RangeError);
    145         return;
    146     }
    147 
    148     getConcreteArray()->setValueAt(exec, index, value);
    149 }
    150 
    151 bool RuntimeArray::deleteProperty(ExecState*, const Identifier&)
    152 {
    153     return false;
    154 }
    155 
    156 bool RuntimeArray::deleteProperty(ExecState*, unsigned)
    157 {
    158     return false;
    159 }
    160 
    161 }
    162