| /* |
| * 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_lazy_event_listener.h" |
| |
| #include "third_party/blink/renderer/bindings/core/v8/script_controller.h" |
| #include "third_party/blink/renderer/bindings/core/v8/script_source_code.h" |
| #include "third_party/blink/renderer/bindings/core/v8/source_location.h" |
| #include "third_party/blink/renderer/bindings/core/v8/v8_binding_for_core.h" |
| #include "third_party/blink/renderer/bindings/core/v8/v8_document.h" |
| #include "third_party/blink/renderer/bindings/core/v8/v8_html_form_element.h" |
| #include "third_party/blink/renderer/bindings/core/v8/v8_node.h" |
| #include "third_party/blink/renderer/bindings/core/v8/v8_script_runner.h" |
| #include "third_party/blink/renderer/core/dom/document.h" |
| #include "third_party/blink/renderer/core/dom/node.h" |
| #include "third_party/blink/renderer/core/events/error_event.h" |
| #include "third_party/blink/renderer/core/execution_context/execution_context.h" |
| #include "third_party/blink/renderer/core/frame/csp/content_security_policy.h" |
| #include "third_party/blink/renderer/core/frame/local_frame.h" |
| #include "third_party/blink/renderer/core/html/forms/html_form_element.h" |
| #include "third_party/blink/renderer/core/html/html_element.h" |
| #include "third_party/blink/renderer/platform/bindings/v8_dom_wrapper.h" |
| #include "third_party/blink/renderer/platform/bindings/v8_private_property.h" |
| #include "third_party/blink/renderer/platform/wtf/std_lib_extras.h" |
| |
| namespace blink { |
| |
| V8LazyEventListener::V8LazyEventListener( |
| v8::Isolate* isolate, |
| const AtomicString& function_name, |
| const AtomicString& event_parameter_name, |
| const String& code, |
| const String source_url, |
| const TextPosition& position, |
| Node* node) |
| : V8AbstractEventHandler(isolate, true, DOMWrapperWorld::MainWorld()), |
| was_compilation_failed_(false), |
| function_name_(function_name), |
| event_parameter_name_(event_parameter_name), |
| code_(code), |
| source_url_(source_url), |
| node_(node), |
| position_(position) {} |
| |
| template <typename T> |
| v8::Local<v8::Object> ToObjectWrapper(T* dom_object, |
| ScriptState* script_state) { |
| if (!dom_object) |
| return v8::Object::New(script_state->GetIsolate()); |
| v8::Local<v8::Value> value = |
| ToV8(dom_object, script_state->GetContext()->Global(), |
| script_state->GetIsolate()); |
| if (value.IsEmpty()) |
| return v8::Object::New(script_state->GetIsolate()); |
| return v8::Local<v8::Object>::New(script_state->GetIsolate(), |
| value.As<v8::Object>()); |
| } |
| |
| v8::Local<v8::Value> V8LazyEventListener::CallListenerFunction( |
| ScriptState* script_state, |
| v8::Local<v8::Value> js_event, |
| Event* event) { |
| DCHECK(!js_event.IsEmpty()); |
| ExecutionContext* execution_context = |
| ToExecutionContext(script_state->GetContext()); |
| v8::Local<v8::Object> listener_object = |
| GetListenerObjectInternal(execution_context); |
| if (listener_object.IsEmpty()) |
| return v8::Local<v8::Value>(); |
| |
| v8::Local<v8::Function> handler_function = listener_object.As<v8::Function>(); |
| v8::Local<v8::Object> receiver = GetReceiverObject(script_state, event); |
| if (handler_function.IsEmpty() || receiver.IsEmpty()) |
| return v8::Local<v8::Value>(); |
| |
| if (!execution_context->IsDocument()) |
| return v8::Local<v8::Value>(); |
| |
| LocalFrame* frame = ToDocument(execution_context)->GetFrame(); |
| if (!frame) |
| return v8::Local<v8::Value>(); |
| |
| if (!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, frame->GetDocument(), |
| receiver, base::size(parameters), |
| parameters, script_state->GetIsolate()) |
| .ToLocal(&result)) |
| return v8::Local<v8::Value>(); |
| return result; |
| } |
| |
| v8::Local<v8::Object> V8LazyEventListener::GetListenerObjectInternal( |
| ExecutionContext* execution_context) { |
| if (!execution_context) |
| return v8::Local<v8::Object>(); |
| |
| // A ScriptState used by the event listener needs to be calculated based on |
| // the ExecutionContext that fired the the event listener and the world |
| // that installed the event listener. |
| v8::EscapableHandleScope handle_scope(ToIsolate(execution_context)); |
| v8::Local<v8::Context> v8_context = ToV8Context(execution_context, World()); |
| if (v8_context.IsEmpty()) |
| return v8::Local<v8::Object>(); |
| ScriptState* script_state = ScriptState::From(v8_context); |
| if (!script_state->ContextIsValid()) |
| return v8::Local<v8::Object>(); |
| |
| if (!execution_context->IsDocument()) |
| return v8::Local<v8::Object>(); |
| |
| if (!ToDocument(execution_context) |
| ->AllowInlineEventHandler(node_, this, source_url_, position_.line_)) |
| return v8::Local<v8::Object>(); |
| |
| // All checks passed and it's now okay to return the function object. |
| |
| // We may need to compile the same script twice or more because the compiled |
| // function object may be garbage-collected, however, we should behave as if |
| // we compile the code only once, i.e. we must not throw an error twice. |
| if (!HasExistingListenerObject() && !was_compilation_failed_) |
| CompileScript(script_state, execution_context); |
| |
| return handle_scope.Escape(GetExistingListenerObject()); |
| } |
| |
| void V8LazyEventListener::CompileScript(ScriptState* script_state, |
| ExecutionContext* execution_context) { |
| DCHECK(!HasExistingListenerObject()); |
| |
| ScriptState::Scope scope(script_state); |
| |
| // Nodes other than the document object, when executing inline event |
| // handlers push document, form owner, and the target node on the scope chain. |
| // We do this by using 'with' statement. |
| // See fast/forms/form-action.html |
| // fast/forms/selected-index-value.html |
| // fast/overflow/onscroll-layer-self-destruct.html |
| HTMLFormElement* form_element = nullptr; |
| if (node_ && node_->IsHTMLElement()) |
| form_element = ToHTMLElement(node_)->formOwner(); |
| |
| v8::Local<v8::Object> scopes[3]; |
| scopes[2] = ToObjectWrapper<Node>(node_, script_state); |
| scopes[1] = ToObjectWrapper<HTMLFormElement>(form_element, script_state); |
| scopes[0] = ToObjectWrapper<Document>( |
| node_ ? node_->ownerDocument() : nullptr, script_state); |
| |
| v8::Local<v8::String> parameter_name = |
| V8String(GetIsolate(), event_parameter_name_); |
| v8::ScriptOrigin origin( |
| V8String(GetIsolate(), source_url_), |
| v8::Integer::New(GetIsolate(), position_.line_.ZeroBasedInt()), |
| v8::Integer::New(GetIsolate(), position_.column_.ZeroBasedInt()), |
| v8::True(GetIsolate())); |
| v8::ScriptCompiler::Source source(V8String(GetIsolate(), code_), origin); |
| |
| v8::Local<v8::Function> wrapped_function; |
| { |
| // JavaScript compilation error shouldn't be reported as a runtime |
| // exception because we're not running any program code. Instead, |
| // it should be reported as an ErrorEvent. |
| v8::TryCatch block(GetIsolate()); |
| v8::MaybeLocal<v8::Function> maybe_result = |
| v8::ScriptCompiler::CompileFunctionInContext( |
| script_state->GetContext(), &source, 1, ¶meter_name, 3, scopes); |
| if (!maybe_result.ToLocal(&wrapped_function)) { |
| was_compilation_failed_ = true; // Do not compile the same code twice. |
| FireErrorEvent(script_state->GetContext(), execution_context, |
| block.Message()); |
| return; |
| } |
| } |
| |
| wrapped_function->SetName(V8String(GetIsolate(), function_name_)); |
| |
| SetListenerObject(script_state, wrapped_function, |
| V8PrivateProperty::GetV8EventListenerOrEventHandlerListener( |
| GetIsolate())); |
| } |
| |
| void V8LazyEventListener::FireErrorEvent(v8::Local<v8::Context> v8_context, |
| ExecutionContext* execution_context, |
| v8::Local<v8::Message> message) { |
| ErrorEvent* event = ErrorEvent::Create( |
| ToCoreStringWithNullCheck(message->Get()), |
| SourceLocation::FromMessage(GetIsolate(), message, execution_context), |
| &World()); |
| |
| AccessControlStatus access_control_status = kNotSharableCrossOrigin; |
| if (message->IsOpaque()) |
| access_control_status = kOpaqueResource; |
| else if (message->IsSharedCrossOrigin()) |
| access_control_status = kSharableCrossOrigin; |
| |
| execution_context->DispatchErrorEvent(event, access_control_status); |
| } |
| |
| } // namespace blink |