| /* |
| * 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 "third_party/blink/renderer/bindings/core/v8/v8_event_listener_or_event_handler.h" |
| |
| #include "third_party/blink/renderer/bindings/core/v8/script_controller.h" |
| #include "third_party/blink/renderer/bindings/core/v8/v8_binding_for_core.h" |
| #include "third_party/blink/renderer/core/dom/document.h" |
| #include "third_party/blink/renderer/core/dom/events/event.h" |
| #include "third_party/blink/renderer/core/execution_context/execution_context.h" |
| #include "third_party/blink/renderer/core/frame/local_frame.h" |
| |
| namespace blink { |
| |
| V8EventListenerOrEventHandler::V8EventListenerOrEventHandler( |
| bool is_attribute, |
| ScriptState* script_state) |
| : V8AbstractEventListener(script_state->GetIsolate(), |
| is_attribute, |
| script_state->World()) {} |
| |
| v8::Local<v8::Function> V8EventListenerOrEventHandler::GetListenerFunction( |
| ScriptState* script_state) { |
| v8::Local<v8::Object> listener = |
| GetListenerObjectInternal(ExecutionContext::From(script_state)); |
| |
| // 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(GetIsolate(), |
| "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(script_state->GetContext(), |
| V8AtomicString(GetIsolate(), "handleEvent")) |
| .ToLocal(&property) && |
| property->IsFunction()) |
| return v8::Local<v8::Function>::Cast(property); |
| } |
| |
| return v8::Local<v8::Function>(); |
| } |
| |
| v8::Local<v8::Value> V8EventListenerOrEventHandler::CallListenerFunction( |
| ScriptState* script_state, |
| v8::Local<v8::Value> js_event, |
| Event* event) { |
| DCHECK(!js_event.IsEmpty()); |
| v8::Local<v8::Function> handler_function = GetListenerFunction(script_state); |
| v8::Local<v8::Object> receiver = GetReceiverObject(script_state, event); |
| if (handler_function.IsEmpty() || receiver.IsEmpty()) |
| return v8::Local<v8::Value>(); |
| |
| ExecutionContext* execution_context = |
| ToExecutionContext(script_state->GetContext()); |
| |
| // TODO(jochen): Consider moving this check into canExecuteScripts. |
| // http://crbug.com/608641 |
| if (script_state->World().IsMainWorld() && |
| !execution_context->CanExecuteScripts(kAboutToExecuteScript)) |
| return v8::Local<v8::Value>(); |
| |
| v8::Local<v8::Value> parameters[1] = {js_event}; |
| v8::Local<v8::Value> result; |
| if (!V8ScriptRunner::CallFunction(handler_function, execution_context, |
| receiver, base::size(parameters), |
| parameters, script_state->GetIsolate()) |
| .ToLocal(&result)) |
| return v8::Local<v8::Value>(); |
| return result; |
| } |
| |
| } // namespace blink |