| /* |
| * Copyright (C) 2006, 2007, 2008, 2009 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. |
| */ |
| |
| #include "bindings/core/v8/V8EventListener.h" |
| |
| #include "bindings/core/v8/ScriptController.h" |
| #include "bindings/core/v8/V8Binding.h" |
| #include "core/dom/Document.h" |
| #include "core/events/Event.h" |
| #include "core/frame/LocalFrame.h" |
| |
| namespace blink { |
| |
| V8EventListener::V8EventListener(bool isAttribute, ScriptState* scriptState) |
| : V8AbstractEventListener(isAttribute, |
| scriptState->world(), |
| scriptState->isolate()) {} |
| |
| v8::Local<v8::Function> V8EventListener::getListenerFunction( |
| ScriptState* scriptState) { |
| v8::Local<v8::Object> listener = |
| getListenerObject(scriptState->getExecutionContext()); |
| |
| // Has the listener been disposed? |
| if (listener.IsEmpty()) |
| return v8::Local<v8::Function>(); |
| |
| if (listener->IsFunction()) |
| return v8::Local<v8::Function>::Cast(listener); |
| |
| // The EventHandler callback function type (used for event handler |
| // attributes in HTML) has [TreatNonObjectAsNull], which implies that |
| // non-function objects should be treated as no-op functions that return |
| // undefined. |
| if (isAttribute()) |
| return v8::Local<v8::Function>(); |
| |
| // Getting the handleEvent property can runs script in the getter. |
| if (ScriptForbiddenScope::isScriptForbidden()) { |
| V8ThrowException::throwError(isolate(), "Script execution is forbidden."); |
| return v8::Local<v8::Function>(); |
| } |
| |
| if (listener->IsObject()) { |
| // Check that no exceptions were thrown when getting the |
| // handleEvent property and that the value is a function. |
| v8::Local<v8::Value> property; |
| if (listener |
| ->Get(scriptState->context(), |
| v8AtomicString(isolate(), "handleEvent")) |
| .ToLocal(&property) && |
| property->IsFunction()) |
| return v8::Local<v8::Function>::Cast(property); |
| } |
| |
| return v8::Local<v8::Function>(); |
| } |
| |
| v8::Local<v8::Value> V8EventListener::callListenerFunction( |
| ScriptState* scriptState, |
| v8::Local<v8::Value> jsEvent, |
| Event* event) { |
| ASSERT(!jsEvent.IsEmpty()); |
| v8::Local<v8::Function> handlerFunction = getListenerFunction(scriptState); |
| v8::Local<v8::Object> receiver = getReceiverObject(scriptState, event); |
| if (handlerFunction.IsEmpty() || receiver.IsEmpty()) |
| return v8::Local<v8::Value>(); |
| |
| if (!scriptState->getExecutionContext()->isDocument()) |
| return v8::Local<v8::Value>(); |
| |
| LocalFrame* frame = toDocument(scriptState->getExecutionContext())->frame(); |
| if (!frame) |
| return v8::Local<v8::Value>(); |
| |
| // TODO(jochen): Consider moving this check into canExecuteScripts. |
| // http://crbug.com/608641 |
| if (scriptState->world().isMainWorld() && |
| !frame->script().canExecuteScripts(AboutToExecuteScript)) |
| return v8::Local<v8::Value>(); |
| |
| v8::Local<v8::Value> parameters[1] = {jsEvent}; |
| v8::Local<v8::Value> result; |
| if (!V8ScriptRunner::callFunction(handlerFunction, frame->document(), |
| receiver, WTF_ARRAY_LENGTH(parameters), |
| parameters, scriptState->isolate()) |
| .ToLocal(&result)) |
| return v8::Local<v8::Value>(); |
| return result; |
| } |
| |
| } // namespace blink |