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      1 /*
      2  * Copyright (C) 2012 Google 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 "bindings/v8/V8DOMConfiguration.h"
     31 
     32 #include "bindings/v8/V8Binding.h"
     33 #include "bindings/v8/V8ObjectConstructor.h"
     34 #include "platform/TraceEvent.h"
     35 
     36 namespace WebCore {
     37 
     38 void V8DOMConfiguration::installAttributes(v8::Handle<v8::ObjectTemplate> instanceTemplate, v8::Handle<v8::ObjectTemplate> prototype, const AttributeConfiguration* attributes, size_t attributeCount, v8::Isolate* isolate)
     39 {
     40     for (size_t i = 0; i < attributeCount; ++i)
     41         installAttribute(instanceTemplate, prototype, attributes[i], isolate);
     42 }
     43 
     44 void V8DOMConfiguration::installAccessors(v8::Handle<v8::ObjectTemplate> prototype, v8::Handle<v8::Signature> signature, const AccessorConfiguration* accessors, size_t accessorCount, v8::Isolate* isolate)
     45 {
     46     bool isMainWorld = DOMWrapperWorld::current(isolate).isMainWorld();
     47     for (size_t i = 0; i < accessorCount; ++i) {
     48         v8::FunctionCallback getterCallback = accessors[i].getter;
     49         v8::FunctionCallback setterCallback = accessors[i].setter;
     50         if (isMainWorld) {
     51             if (accessors[i].getterForMainWorld)
     52                 getterCallback = accessors[i].getterForMainWorld;
     53             if (accessors[i].setterForMainWorld)
     54                 setterCallback = accessors[i].setterForMainWorld;
     55         }
     56 
     57         v8::Local<v8::FunctionTemplate> getter;
     58         if (getterCallback) {
     59             getter = v8::FunctionTemplate::New(isolate, getterCallback, v8::External::New(isolate, const_cast<WrapperTypeInfo*>(accessors[i].data)), signature, 0);
     60             getter->RemovePrototype();
     61         }
     62         v8::Local<v8::FunctionTemplate> setter;
     63         if (setterCallback) {
     64             setter = v8::FunctionTemplate::New(isolate, setterCallback, v8::External::New(isolate, const_cast<WrapperTypeInfo*>(accessors[i].data)), signature, 1);
     65             setter->RemovePrototype();
     66         }
     67         prototype->SetAccessorProperty(v8AtomicString(isolate, accessors[i].name), getter, setter, accessors[i].attribute, accessors[i].settings);
     68     }
     69 }
     70 
     71 void V8DOMConfiguration::installConstants(v8::Handle<v8::FunctionTemplate> functionDescriptor, v8::Handle<v8::ObjectTemplate> prototype, const ConstantConfiguration* constants, size_t constantCount, v8::Isolate* isolate)
     72 {
     73     for (size_t i = 0; i < constantCount; ++i) {
     74         const ConstantConfiguration* constant = &constants[i];
     75         v8::Handle<v8::String> constantName = v8AtomicString(isolate, constant->name);
     76         functionDescriptor->Set(constantName, v8::Integer::New(isolate, constant->value), static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontDelete));
     77         prototype->Set(constantName, v8::Integer::New(isolate, constant->value), static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontDelete));
     78     }
     79 }
     80 
     81 void V8DOMConfiguration::installCallbacks(v8::Handle<v8::ObjectTemplate> prototype, v8::Handle<v8::Signature> signature, v8::PropertyAttribute attributes, const MethodConfiguration* callbacks, size_t callbackCount, v8::Isolate* isolate)
     82 {
     83     bool isMainWorld = DOMWrapperWorld::current(isolate).isMainWorld();
     84     for (size_t i = 0; i < callbackCount; ++i) {
     85         v8::FunctionCallback callback = callbacks[i].callback;
     86         if (isMainWorld && callbacks[i].callbackForMainWorld)
     87             callback = callbacks[i].callbackForMainWorld;
     88         v8::Local<v8::FunctionTemplate> functionTemplate = v8::FunctionTemplate::New(isolate, callback, v8Undefined(), signature, callbacks[i].length);
     89         functionTemplate->RemovePrototype();
     90         prototype->Set(v8AtomicString(isolate, callbacks[i].name), functionTemplate, attributes);
     91     }
     92 }
     93 
     94 v8::Local<v8::Signature> V8DOMConfiguration::installDOMClassTemplate(v8::Handle<v8::FunctionTemplate> functionDescriptor, const char* interfaceName, v8::Handle<v8::FunctionTemplate> parentClass, size_t fieldCount,
     95     const AttributeConfiguration* attributes, size_t attributeCount,
     96     const AccessorConfiguration* accessors, size_t accessorCount,
     97     const MethodConfiguration* callbacks, size_t callbackCount,
     98     v8::Isolate* isolate)
     99 {
    100     functionDescriptor->SetClassName(v8AtomicString(isolate, interfaceName));
    101     v8::Local<v8::ObjectTemplate> instanceTemplate = functionDescriptor->InstanceTemplate();
    102     instanceTemplate->SetInternalFieldCount(fieldCount);
    103     if (!parentClass.IsEmpty()) {
    104         functionDescriptor->Inherit(parentClass);
    105         // Marks the prototype object as one of native-backed objects.
    106         // This is needed since bug 110436 asks WebKit to tell native-initiated prototypes from pure-JS ones.
    107         // This doesn't mark kinds "root" classes like Node, where setting this changes prototype chain structure.
    108         v8::Local<v8::ObjectTemplate> prototype = functionDescriptor->PrototypeTemplate();
    109         prototype->SetInternalFieldCount(v8PrototypeInternalFieldcount);
    110     }
    111 
    112     v8::Local<v8::Signature> defaultSignature = v8::Signature::New(isolate, functionDescriptor);
    113     if (attributeCount)
    114         installAttributes(instanceTemplate, functionDescriptor->PrototypeTemplate(), attributes, attributeCount, isolate);
    115     if (accessorCount)
    116         installAccessors(functionDescriptor->PrototypeTemplate(), defaultSignature, accessors, accessorCount, isolate);
    117     if (callbackCount)
    118         installCallbacks(functionDescriptor->PrototypeTemplate(), defaultSignature, static_cast<v8::PropertyAttribute>(v8::DontDelete), callbacks, callbackCount, isolate);
    119     return defaultSignature;
    120 }
    121 
    122 v8::Handle<v8::FunctionTemplate> V8DOMConfiguration::domClassTemplate(v8::Isolate* isolate, WrapperTypeInfo* wrapperTypeInfo, void (*configureDOMClassTemplate)(v8::Handle<v8::FunctionTemplate>, v8::Isolate*))
    123 {
    124     V8PerIsolateData* data = V8PerIsolateData::from(isolate);
    125     v8::Local<v8::FunctionTemplate> result = data->existingDOMTemplate(wrapperTypeInfo);
    126     if (!result.IsEmpty())
    127         return result;
    128 
    129     TRACE_EVENT_SCOPED_SAMPLING_STATE("Blink", "BuildDOMTemplate");
    130     result = v8::FunctionTemplate::New(isolate, V8ObjectConstructor::isValidConstructorMode);
    131     configureDOMClassTemplate(result, isolate);
    132     data->setDOMTemplate(wrapperTypeInfo, result);
    133     return result;
    134 }
    135 
    136 } // namespace WebCore
    137