WebCore/bridge/runtime_array.cpp

   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)
  61 {
  62     unsigned length = getLength();
  63     for (unsigned i = 0; i < length; ++i)
  64         propertyNames.add(Identifier::from(exec, i));
  65
  66     JSObject::getOwnPropertyNames(exec, propertyNames);
  67 }
  68
  69 bool RuntimeArray::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
  70 {
  71     if (propertyName == exec->propertyNames().length) {
  72         slot.setCustom(this, lengthGetter);
  73         return true;
  74     }
  75
  76     bool ok;
  77     unsigned index = propertyName.toArrayIndex(&ok);
  78     if (ok) {
  79         if (index < getLength()) {
  80             slot.setCustomIndex(this, index, indexGetter);
  81             return true;
  82         }
  83     }
  84
  85     return JSObject::getOwnPropertySlot(exec, propertyName, slot);
  86 }
  87
  88 bool RuntimeArray::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
  89 {
  90     if (propertyName == exec->propertyNames().length) {
  91         PropertySlot slot;
  92         slot.setCustom(this, lengthGetter);
  93         descriptor.setDescriptor(slot.getValue(exec, propertyName), ReadOnly | DontDelete | DontEnum);
  94         return true;
  95     }
  96
  97     bool ok;
  98     unsigned index = propertyName.toArrayIndex(&ok);
  99     if (ok) {
 100         if (index < getLength()) {
 101             PropertySlot slot;
 102             slot.setCustomIndex(this, index, indexGetter);
 103             descriptor.setDescriptor(slot.getValue(exec, propertyName), DontDelete | DontEnum);
 104             return true;
 105         }
 106     }
 107
 108     return JSObject::getOwnPropertyDescriptor(exec, propertyName, descriptor);
 109 }
 110
 111 bool RuntimeArray::getOwnPropertySlot(ExecState *exec, unsigned index, PropertySlot& slot)
 112 {
 113     if (index < getLength()) {
 114         slot.setCustomIndex(this, index, indexGetter);
 115         return true;
 116     }
 117
 118     return JSObject::getOwnPropertySlot(exec, index, slot);
 119 }
 120
 121 void RuntimeArray::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
 122 {
 123     if (propertyName == exec->propertyNames().length) {
 124         throwError(exec, RangeError);
 125         return;
 126     }
 127
 128     bool ok;
 129     unsigned index = propertyName.toArrayIndex(&ok);
 130     if (ok) {
 131         getConcreteArray()->setValueAt(exec, index, value);
 132         return;
 133     }
 134
 135     JSObject::put(exec, propertyName, value, slot);
 136 }
 137
 138 void RuntimeArray::put(ExecState* exec, unsigned index, JSValue value)
 139 {
 140     if (index >= getLength()) {
 141         throwError(exec, RangeError);
 142         return;
 143     }
 144
 145     getConcreteArray()->setValueAt(exec, index, value);
 146 }
 147
 148 bool RuntimeArray::deleteProperty(ExecState*, const Identifier&)
 149 {
 150     return false;
 151 }
 152
 153 bool RuntimeArray::deleteProperty(ExecState*, unsigned)
 154 {
 155     return false;
 156 }
 157
 158 }