| /* |
| * 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 "config.h" |
| #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/frame/LocalFrame.h" |
| |
| namespace blink { |
| |
| V8EventListener::V8EventListener(v8::Local<v8::Object> listener, bool isAttribute, ScriptState* scriptState) |
| : V8AbstractEventListener(isAttribute, scriptState) |
| { |
| setListenerObject(listener); |
| } |
| |
| v8::Local<v8::Function> V8EventListener::getListenerFunction(ExecutionContext*) |
| { |
| v8::Local<v8::Object> listener = getListenerObject(scriptState()->executionContext()); |
| |
| // Has the listener been disposed? |
| if (listener.IsEmpty()) |
| return v8::Local<v8::Function>(); |
| |
| if (listener->IsFunction()) |
| return v8::Local<v8::Function>::Cast(listener); |
| |
| if (listener->IsObject()) { |
| ASSERT_WITH_MESSAGE(!isAttribute(), "EventHandler attributes should only accept JS Functions as input."); |
| v8::Local<v8::Value> property = listener->Get(v8AtomicString(isolate(), "handleEvent")); |
| // Check that no exceptions were thrown when getting the |
| // handleEvent property and that the value is a function. |
| if (!property.IsEmpty() && property->IsFunction()) |
| return v8::Local<v8::Function>::Cast(property); |
| } |
| |
| return v8::Local<v8::Function>(); |
| } |
| |
| v8::Local<v8::Value> V8EventListener::callListenerFunction(v8::Handle<v8::Value> jsEvent, Event* event) |
| { |
| v8::Local<v8::Function> handlerFunction = getListenerFunction(scriptState()->executionContext()); |
| v8::Local<v8::Object> receiver = getReceiverObject(event); |
| if (handlerFunction.IsEmpty() || receiver.IsEmpty()) |
| return v8::Local<v8::Value>(); |
| |
| if (!scriptState()->executionContext()->isDocument()) |
| return v8::Local<v8::Value>(); |
| |
| LocalFrame* frame = toDocument(scriptState()->executionContext())->frame(); |
| if (!frame) |
| return v8::Local<v8::Value>(); |
| |
| if (!frame->script().canExecuteScripts(AboutToExecuteScript)) |
| return v8::Local<v8::Value>(); |
| |
| v8::Handle<v8::Value> parameters[1] = { jsEvent }; |
| return frame->script().callFunction(handlerFunction, receiver, WTF_ARRAY_LENGTH(parameters), parameters); |
| } |
| |
| } // namespace blink |