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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Copied from base/basictypes.h with some modifications
#ifndef V8_PROPERTY_H__
#define V8_PROPERTY_H__
#include <v8.h>
#include "v8_proxy.h"
namespace WebCore {
// Returns named property of a collection.
template <class C>
static v8::Handle<v8::Value> GetNamedPropertyOfCollection(
v8::Local<v8::String> name,
v8::Local<v8::Object> object,
v8::Local<v8::Value> data) {
// TODO: assert object is a collection type
ASSERT(V8Proxy::MaybeDOMWrapper(object));
V8ClassIndex::V8WrapperType t = V8Proxy::GetDOMWrapperType(object);
C* collection = V8Proxy::FastToNativeObject<C>(t, object);
String prop_name = ToWebCoreString(name);
void* result = collection->namedItem(prop_name);
if (!result) return v8::Handle<v8::Value>();
V8ClassIndex::V8WrapperType type = V8ClassIndex::ToWrapperType(data);
return V8Proxy::ToV8Object(type, result);
}
// A template of named property accessor of collections.
template <class C>
static v8::Handle<v8::Value> CollectionNamedPropertyGetter(
v8::Local<v8::String> name, const v8::AccessorInfo& info) {
return GetNamedPropertyOfCollection<C>(name, info.Holder(), info.Data());
}
// A template returns whether a collection has a named property.
// This function does not cause JS heap allocation.
template <class C>
static bool HasNamedPropertyOfCollection(v8::Local<v8::String> name,
v8::Local<v8::Object> object,
v8::Local<v8::Value> data) {
// TODO: assert object is a collection type
ASSERT(V8Proxy::MaybeDOMWrapper(object));
V8ClassIndex::V8WrapperType t = V8Proxy::GetDOMWrapperType(object);
C* collection = V8Proxy::FastToNativeObject<C>(t, object);
String prop_name = ToWebCoreString(name);
void* result = collection->namedItem(prop_name);
return result != NULL;
}
// Returns the property at the index of a collection.
template <class C>
static v8::Handle<v8::Value> GetIndexedPropertyOfCollection(
uint32_t index, v8::Local<v8::Object> object, v8::Local<v8::Value> data) {
// TODO, assert that object must be a collection type
ASSERT(V8Proxy::MaybeDOMWrapper(object));
V8ClassIndex::V8WrapperType t = V8Proxy::GetDOMWrapperType(object);
C* collection = V8Proxy::FastToNativeObject<C>(t, object);
void* result = collection->item(index);
if (!result) return v8::Handle<v8::Value>();
V8ClassIndex::V8WrapperType type = V8ClassIndex::ToWrapperType(data);
return V8Proxy::ToV8Object(type, result);
}
// A template of index interceptor of collections.
template <class C>
static v8::Handle<v8::Value> CollectionIndexedPropertyGetter(
uint32_t index, const v8::AccessorInfo& info) {
return GetIndexedPropertyOfCollection<C>(index, info.Holder(), info.Data());
}
// Get an array containing the names of indexed properties in a collection.
template <class C>
static v8::Handle<v8::Array> CollectionIndexedPropertyEnumerator(
const v8::AccessorInfo& info) {
ASSERT(V8Proxy::MaybeDOMWrapper(info.Holder()));
V8ClassIndex::V8WrapperType t = V8Proxy::GetDOMWrapperType(info.Holder());
C* collection = V8Proxy::FastToNativeObject<C>(t, info.Holder());
int length = collection->length();
v8::Handle<v8::Array> properties = v8::Array::New(length);
for (int i = 0; i < length; i++) {
// TODO(ager): Do we need to check that the item function returns
// a non-null value for this index?
v8::Handle<v8::Integer> integer = v8::Integer::New(i);
properties->Set(integer, integer);
}
return properties;
}
// Returns whether a collection has a property at a given index.
// This function does not cause JS heap allocation.
template <class C>
static bool HasIndexedPropertyOfCollection(uint32_t index,
v8::Local<v8::Object> object,
v8::Local<v8::Value> data) {
// TODO, assert that object must be a collection type
ASSERT(V8Proxy::MaybeDOMWrapper(object));
V8ClassIndex::V8WrapperType t = V8Proxy::GetDOMWrapperType(object);
C* collection = V8Proxy::FastToNativeObject<C>(t, object);
void* result = collection->item(index);
return result != NULL;
}
// A template for indexed getters on collections of strings that should return
// null if the resulting string is a null string.
template <class C>
static v8::Handle<v8::Value> CollectionStringOrNullIndexedPropertyGetter(
uint32_t index, const v8::AccessorInfo& info) {
// TODO, assert that object must be a collection type
ASSERT(V8Proxy::MaybeDOMWrapper(info.Holder()));
V8ClassIndex::V8WrapperType t = V8Proxy::GetDOMWrapperType(info.Holder());
C* collection = V8Proxy::FastToNativeObject<C>(t, info.Holder());
String result = collection->item(index);
return v8StringOrNull(result);
}
// Add indexed getter to the function template for a collection.
template <class T>
static void SetCollectionIndexedGetter(v8::Handle<v8::FunctionTemplate> desc,
V8ClassIndex::V8WrapperType type) {
desc->InstanceTemplate()->SetIndexedPropertyHandler(
CollectionIndexedPropertyGetter<T>,
0,
0,
0,
CollectionIndexedPropertyEnumerator<T>,
v8::External::New(reinterpret_cast<void*>(type)));
}
// Add named getter to the function template for a collection.
template <class T>
static void SetCollectionNamedGetter(v8::Handle<v8::FunctionTemplate> desc,
V8ClassIndex::V8WrapperType type) {
desc->InstanceTemplate()->SetNamedPropertyHandler(
CollectionNamedPropertyGetter<T>,
0,
0,
0,
0,
v8::External::New(reinterpret_cast<void*>(type)));
}
// Add named and indexed getters to the function template for a collection.
template <class T>
static void SetCollectionIndexedAndNamedGetters(
v8::Handle<v8::FunctionTemplate> desc, V8ClassIndex::V8WrapperType type) {
// If we interceptor before object, accessing 'length' can trigger
// a webkit assertion error.
// (see fast/dom/HTMLDocument/document-special-properties.html
desc->InstanceTemplate()->SetNamedPropertyHandler(
CollectionNamedPropertyGetter<T>,
0,
0,
0,
0,
v8::External::New(reinterpret_cast<void*>(type)));
desc->InstanceTemplate()->SetIndexedPropertyHandler(
CollectionIndexedPropertyGetter<T>,
0,
0,
0,
CollectionIndexedPropertyEnumerator<T>,
v8::External::New(reinterpret_cast<void*>(type)));
}
// Add indexed getter returning a string or null to a function template
// for a collection.
template <class T>
static void SetCollectionStringOrNullIndexedGetter(
v8::Handle<v8::FunctionTemplate> desc) {
desc->InstanceTemplate()->SetIndexedPropertyHandler(
CollectionStringOrNullIndexedPropertyGetter<T>,
0,
0,
0,
CollectionIndexedPropertyEnumerator<T>);
}
} // namespace WebCore
#endif // V8_PROPERTY_H__
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