kjs/JSVariableObject.cpp

   1 /*
   2  * Copyright (C) 2007, 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  *
   8  * 1.  Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  14  *     its contributors may be used to endorse or promote products derived
  15  *     from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include "config.h"
  30 #include "JSVariableObject.h"
  31
  32 #include "PropertyNameArray.h"
  33 #include "property_map.h"
  34
  35 namespace KJS {
  36
  37 UString::Rep* IdentifierRepHashTraits::nullRepPtr = &UString::Rep::null; // Didn't want to make a whole source file for just this.
  38
  39 void JSVariableObject::saveLocalStorage(SavedProperties& p) const
  40 {
  41     ASSERT(d->symbolTable);
  42     ASSERT(static_cast<size_t>(d->symbolTable->size()) == d->localStorage.size());
  43
  44     unsigned count = d->symbolTable->size();
  45
  46     p.properties.clear();
  47     p.count = count;
  48
  49     if (!count)
  50         return;
  51
  52     p.properties.set(new SavedProperty[count]);
  53
  54     SymbolTable::const_iterator end = d->symbolTable->end();
  55     for (SymbolTable::const_iterator it = d->symbolTable->begin(); it != end; ++it) {
  56         size_t i = it->second;
  57         const LocalStorageEntry& entry = d->localStorage[i];
  58         p.properties[i].init(it->first.get(), entry.value, entry.attributes);
  59     }
  60 }
  61
  62 void JSVariableObject::restoreLocalStorage(const SavedProperties& p)
  63 {
  64     unsigned count = p.count;
  65     d->symbolTable->clear();
  66     d->localStorage.resize(count);
  67     SavedProperty* property = p.properties.get();
  68     for (size_t i = 0; i < count; ++i, ++property) {
  69         ASSERT(!d->symbolTable->contains(property->name()));
  70         LocalStorageEntry& entry = d->localStorage[i];
  71         d->symbolTable->set(property->name(), i);
  72         entry.value = property->value();
  73         entry.attributes = property->attributes();
  74     }
  75 }
  76
  77 bool JSVariableObject::deleteProperty(ExecState* exec, const Identifier& propertyName)
  78 {
  79     if (symbolTable().contains(propertyName.ustring().rep()))
  80         return false;
  81
  82     return JSObject::deleteProperty(exec, propertyName);
  83 }
  84
  85 void JSVariableObject::getPropertyNames(ExecState* exec, PropertyNameArray& propertyNames)
  86 {
  87     SymbolTable::const_iterator::Keys end = symbolTable().end().keys();
  88     for (SymbolTable::const_iterator::Keys it = symbolTable().begin().keys(); it != end; ++it)
  89         propertyNames.add(Identifier(it->get()));
  90
  91     JSObject::getPropertyNames(exec, propertyNames);
  92 }
  93
  94 void JSVariableObject::mark()
  95 {
  96     JSObject::mark();
  97
  98     size_t size = d->localStorage.size();
  99     for (size_t i = 0; i < size; ++i) {
 100         JSValue* value = d->localStorage[i].value;
 101         if (!value->marked())
 102             value->mark();
 103     }
 104 }
 105
 106 } // namespace KJS