1 /*

     2  * Copyright (C) 2009 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 are

     6  * met:

     7  *

     8  *     * Redistributions of source code must retain the above copyright

     9  * notice, this list of conditions and the following disclaimer.

    10  *     * Redistributions in binary form must reproduce the above

    11  * copyright notice, this list of conditions and the following disclaimer

    12  * in the documentation and/or other materials provided with the

    13  * distribution.

    14  *     * Neither the name of Google Inc. nor the names of its

    15  * contributors may be used to endorse or promote products derived from

    16  * this software without specific prior written permission.

    17  *

    18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

    19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

    20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

    21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

    22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

    23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

    24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

    25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

    26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    29  */

    30 

    31 #include "config.h"

    32 #include "WebBindings.h"

    33 

    34 #include "npruntime_impl.h"

    35 #include "npruntime_priv.h"

    36 

    37 #if USE(V8)

    38 #include "ChromiumDataObject.h"

    39 #include "ClipboardChromium.h"

    40 #include "EventNames.h"

    41 #include "MouseEvent.h"

    42 #include "NPV8Object.h"  // for PrivateIdentifier

    43 #include "Range.h"

    44 #include "V8BindingState.h"

    45 #include "V8DOMWrapper.h"

    46 #include "V8Event.h"

    47 #include "V8Helpers.h"

    48 #include "V8HiddenPropertyName.h"

    49 #include "V8NPUtils.h"

    50 #include "V8Proxy.h"

    51 #include "V8Range.h"

    52 #elif USE(JSC)

    53 #include "bridge/c/c_utility.h"

    54 #endif

    55 #include "WebDragData.h"

    56 #include "WebRange.h"

    57 

    58 #if USE(JAVASCRIPTCORE_BINDINGS)

    59 using JSC::Bindings::PrivateIdentifier;

    60 #endif

    61 

    62 using namespace WebCore;

    63 

    64 namespace WebKit {

    65 

    66 bool WebBindings::construct(NPP npp, NPObject *npobj, const NPVariant *args, uint32_t argCount, NPVariant* result)

    67 {

    68     return _NPN_Construct(npp, npobj, args, argCount, result);

    69 }

    70 

    71 NPObject* WebBindings::createObject(NPP npp, NPClass* npClass)

    72 {

    73     return _NPN_CreateObject(npp, npClass);

    74 }

    75 

    76 bool WebBindings::enumerate(NPP id, NPObject* obj, NPIdentifier** identifier, uint32_t* val)

    77 {

    78     return _NPN_Enumerate(id, obj, identifier, val);

    79 }

    80 

    81 bool WebBindings::evaluate(NPP npp, NPObject* npObject, NPString* npScript, NPVariant* result)

    82 {

    83     return _NPN_Evaluate(npp, npObject, npScript, result);

    84 }

    85 

    86 bool WebBindings::evaluateHelper(NPP npp, bool popups_allowed, NPObject* npobj, NPString* npscript, NPVariant* result)

    87 {

    88     return _NPN_EvaluateHelper(npp, popups_allowed, npobj, npscript, result);

    89 }

    90 

    91 NPIdentifier WebBindings::getIntIdentifier(int32_t number)

    92 {

    93     return _NPN_GetIntIdentifier(number);

    94 }

    95 

    96 bool WebBindings::getProperty(NPP npp, NPObject* obj, NPIdentifier propertyName, NPVariant *result)

    97 {

    98     return _NPN_GetProperty(npp, obj, propertyName, result);

    99 }

   100 

   101 NPIdentifier WebBindings::getStringIdentifier(const NPUTF8* string)

   102 {

   103     return _NPN_GetStringIdentifier(string);

   104 }

   105 

   106 void WebBindings::getStringIdentifiers(const NPUTF8** names, int32_t nameCount, NPIdentifier* identifiers)

   107 {

   108     _NPN_GetStringIdentifiers(names, nameCount, identifiers);

   109 }

   110 

   111 bool WebBindings::hasMethod(NPP npp, NPObject* npObject, NPIdentifier methodName)

   112 {

   113     return _NPN_HasMethod(npp, npObject, methodName);

   114 }

   115 

   116 bool WebBindings::hasProperty(NPP npp, NPObject* npObject, NPIdentifier propertyName)

   117 {

   118     return _NPN_HasProperty(npp, npObject, propertyName);

   119 }

   120 

   121 bool WebBindings::identifierIsString(NPIdentifier identifier)

   122 {

   123     return _NPN_IdentifierIsString(identifier);

   124 }

   125 

   126 int32_t WebBindings::intFromIdentifier(NPIdentifier identifier)

   127 {

   128     return _NPN_IntFromIdentifier(identifier);

   129 }

   130 

   131 void WebBindings::initializeVariantWithStringCopy(NPVariant* variant, const NPString* value)

   132 {

   133 #if USE(V8)

   134     _NPN_InitializeVariantWithStringCopy(variant, value);

   135 #else

   136     NPN_InitializeVariantWithStringCopy(variant, value);

   137 #endif

   138 }

   139 

   140 bool WebBindings::invoke(NPP npp, NPObject* npObject, NPIdentifier methodName, const NPVariant* arguments, uint32_t argumentCount, NPVariant* result)

   141 {

   142     return _NPN_Invoke(npp, npObject, methodName, arguments, argumentCount, result);

   143 }

   144 

   145 bool WebBindings::invokeDefault(NPP id, NPObject* obj, const NPVariant* args, uint32_t count, NPVariant* result)

   146 {

   147     return _NPN_InvokeDefault(id, obj, args, count, result);

   148 }

   149 

   150 void WebBindings::releaseObject(NPObject* npObject)

   151 {

   152     return _NPN_ReleaseObject(npObject);

   153 }

   154 

   155 void WebBindings::releaseVariantValue(NPVariant* variant)

   156 {

   157     _NPN_ReleaseVariantValue(variant);

   158 }

   159 

   160 bool WebBindings::removeProperty(NPP id, NPObject* object, NPIdentifier identifier)

   161 {

   162     return  _NPN_RemoveProperty(id, object, identifier);

   163 }

   164 

   165 NPObject* WebBindings::retainObject(NPObject* npObject)

   166 {

   167     return _NPN_RetainObject(npObject);

   168 }

   169 

   170 void WebBindings::setException(NPObject* obj, const NPUTF8* message)

   171 {

   172     _NPN_SetException(obj, message);

   173 }

   174 

   175 bool WebBindings::setProperty(NPP id, NPObject* obj, NPIdentifier identifier, const NPVariant* variant)

   176 {

   177     return _NPN_SetProperty(id, obj, identifier, variant);

   178 }

   179 

   180 void WebBindings::unregisterObject(NPObject* npObject)

   181 {

   182 #if USE(V8)

   183     _NPN_UnregisterObject(npObject);

   184 #endif

   185 }

   186 

   187 NPUTF8* WebBindings::utf8FromIdentifier(NPIdentifier identifier)

   188 {

   189     return _NPN_UTF8FromIdentifier(identifier);

   190 }

   191 

   192 void WebBindings::extractIdentifierData(const NPIdentifier& identifier, const NPUTF8*& string, int32_t& number, bool& isString)

   193 {

   194     PrivateIdentifier* priv = static_cast<PrivateIdentifier*>(identifier);

   195     if (!priv) {

   196         isString = false;

   197         number = 0;

   198         return;

   199     }

   200 

   201     isString = priv->isString;

   202     if (isString)

   203         string = priv->value.string;

   204     else

   205         number = priv->value.number;

   206 }

   207 

   208 #if USE(V8)

   209 

   210 static v8::Local<v8::Value> getEvent(const v8::Handle<v8::Context>& context)

   211 {

   212     return context->Global()->GetHiddenValue(V8HiddenPropertyName::event());

   213 }

   214 

   215 static bool getDragDataImpl(NPObject* npobj, int* eventId, WebDragData* data)

   216 {

   217     if (!npobj)

   218         return false;

   219     if (npobj->_class != npScriptObjectClass)

   220         return false;

   221 

   222     v8::HandleScope handleScope;

   223     v8::Handle<v8::Context> context = v8::Context::GetEntered();

   224     if (context.IsEmpty())

   225         return false;

   226 

   227     // Get the current WebCore event.

   228     v8::Handle<v8::Value> currentEvent(getEvent(context));

   229     Event* event = V8Event::toNative(v8::Handle<v8::Object>::Cast(currentEvent));

   230     if (!event)

   231         return false;

   232 

   233     // Check that the given npobj is that event.

   234     V8NPObject* object = reinterpret_cast<V8NPObject*>(npobj);

   235     Event* given = V8Event::toNative(object->v8Object);

   236     if (given != event)

   237         return false;

   238 

   239     // Check the execution frames are same origin.

   240     V8Proxy* current = V8Proxy::retrieve(V8Proxy::retrieveFrameForCurrentContext());

   241     Frame* frame = V8Proxy::retrieveFrame(context);

   242     if (!current || !V8BindingSecurity::canAccessFrame(V8BindingState::Only(), frame, false))

   243         return false;

   244 

   245     const EventNames& names(eventNames());

   246     const AtomicString& eventType(event->type());

   247 

   248     enum DragTargetMouseEventId {

   249         DragEnterId = 1, DragOverId = 2, DragLeaveId = 3, DropId = 4

   250     };

   251 

   252     // The event type should be a drag event.

   253     if (eventType == names.dragenterEvent)

   254         *eventId = DragEnterId;

   255     else if (eventType == names.dragoverEvent)

   256         *eventId = DragOverId;

   257     else if (eventType == names.dragleaveEvent)

   258         *eventId = DragLeaveId;

   259     else if (eventType == names.dropEvent)

   260         *eventId = DropId;

   261     else

   262         return false;

   263 

   264     // Drag events are mouse events and should have a clipboard.

   265     MouseEvent* me = static_cast<MouseEvent*>(event);

   266     Clipboard* clipboard = me->clipboard();

   267     if (!clipboard)

   268         return false;

   269 

   270     // And that clipboard should be accessible by WebKit policy.

   271     ClipboardChromium* chrome = static_cast<ClipboardChromium*>(clipboard);

   272     HashSet<String> accessible(chrome->types());

   273     if (accessible.isEmpty())

   274         return false;

   275 

   276     RefPtr<ChromiumDataObject> dataObject(chrome->dataObject());

   277     if (dataObject && data)

   278         *data = WebDragData(dataObject);

   279 

   280     return dataObject;

   281 }

   282 

   283 static bool getRangeImpl(NPObject* npobj, WebRange* range)

   284 {

   285     V8NPObject* v8npobject = reinterpret_cast<V8NPObject*>(npobj);

   286     v8::Handle<v8::Object> v8object(v8npobject->v8Object);

   287     if (!V8Range::info.equals(V8DOMWrapper::domWrapperType(v8object)))

   288         return false;

   289 

   290     Range* native = V8Range::toNative(v8object);

   291     if (!native)

   292         return false;

   293 

   294     *range = WebRange(native);

   295     return true;

   296 }

   297 

   298 #endif

   299 

   300 bool WebBindings::getDragData(NPObject* event, int* eventId, WebDragData* data)

   301 {

   302 #if USE(V8)

   303     return getDragDataImpl(event, eventId, data);

   304 #else

   305     // Not supported on other ports (JSC, etc).

   306     return false;

   307 #endif

   308 }

   309 

   310 bool WebBindings::isDragEvent(NPObject* event)

   311 {

   312     int eventId;

   313     return getDragData(event, &eventId, 0);

   314 }

   315 

   316 bool WebBindings::getRange(NPObject* range, WebRange* webrange)

   317 {

   318 #if USE(V8)

   319     return getRangeImpl(range, webrange);

   320 #else

   321     // Not supported on other ports (JSC, etc).

   322     return false;

   323 #endif

   324 }

   325 

   326 void WebBindings::pushExceptionHandler(ExceptionHandler handler, void* data)

   327 {

   328     WebCore::pushExceptionHandler(handler, data);

   329 }

   330 

   331 void WebBindings::popExceptionHandler()

   332 {

   333     WebCore::popExceptionHandler();

   334 }

   335 

   336 } // namespace WebKit