Index: third_party/WebKit/WebCore/bindings/v8/V8LazyEventListener.cpp |
=================================================================== |
--- third_party/WebKit/WebCore/bindings/v8/V8LazyEventListener.cpp (revision 0) |
+++ third_party/WebKit/WebCore/bindings/v8/V8LazyEventListener.cpp (revision 11711) |
@@ -0,0 +1,196 @@ |
+/* |
+ * 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 "V8LazyEventListener.h" |
+ |
+#include "Frame.h" |
+#include "V8Binding.h" |
+#include "V8Proxy.h" |
+ |
+namespace WebCore { |
+ |
+V8LazyEventListener::V8LazyEventListener(Frame *frame, const String& code, const String& functionName) |
+ : V8AbstractEventListener(frame, true) |
+ , m_code(code) |
+ , m_functionName(functionName) |
+ , m_compiled(false) |
+ , m_wrappedFunctionCompiled(false) |
+{ |
+} |
+ |
+V8LazyEventListener::~V8LazyEventListener() |
+{ |
+ disposeListenerObject(); |
+ |
+ // Dispose wrapped function |
+ if (!m_wrappedFunction.IsEmpty()) { |
+#ifndef NDEBUG |
+ V8Proxy::UnregisterGlobalHandle(this, m_wrappedFunction); |
+#endif |
+ m_wrappedFunction.Dispose(); |
+ m_wrappedFunction.Clear(); |
+ } |
+} |
+ |
+v8::Local<v8::Function> V8LazyEventListener::getListenerFunction() |
+{ |
+ if (m_compiled) { |
+ ASSERT(m_listener.IsEmpty() || m_listener->IsFunction()); |
+ return m_listener.IsEmpty() ? v8::Local<v8::Function>() : v8::Local<v8::Function>::New(v8::Persistent<v8::Function>::Cast(m_listener)); |
+ } |
+ |
+ m_compiled = true; |
+ |
+ ASSERT(m_frame); |
+ |
+ { |
+ // Switch to the context of m_frame. |
+ v8::HandleScope handleScope; |
+ |
+ // Use the outer scope to hold context. |
+ v8::Handle<v8::Context> context = V8Proxy::GetContext(m_frame); |
+ // Bail out if we could not get the context. |
+ if (context.IsEmpty()) |
+ return v8::Local<v8::Function>(); |
+ |
+ v8::Context::Scope scope(context); |
+ |
+ // Wrap function around the event code. The parenthesis around the function are needed so that evaluating the code yields |
+ // the function value. Without the parenthesis the function value is thrown away. |
+ |
+ // Make it an anonymous function to avoid name conflict for cases like |
+ // <body onload='onload()'> |
+ // <script> function onload() { alert('hi'); } </script>. |
+ // Set function name to function object instead. |
+ // See issue 944690. |
+ // |
+ // The ECMAScript spec says (very obliquely) that the parameter to an event handler is named "evt". |
+ String code = "(function (evt) {\n"; |
+ code.append(m_code); |
+ code.append("\n})"); |
+ |
+ v8::Handle<v8::String> codeExternalString = v8ExternalString(code); |
+ v8::Handle<v8::Script> script = V8Proxy::CompileScript(codeExternalString, m_frame->document()->url(), m_lineNumber - 1); |
+ if (!script.IsEmpty()) { |
+ V8Proxy* proxy = V8Proxy::retrieve(m_frame); |
+ ASSERT(proxy); |
+ v8::Local<v8::Value> value = proxy->RunScript(script, false); |
+ if (!value.IsEmpty()) { |
+ ASSERT(value->IsFunction()); |
+ v8::Local<v8::Function> listenerFunction = v8::Local<v8::Function>::Cast(value); |
+ listenerFunction->SetName(v8::String::New(FromWebCoreString(m_functionName), m_functionName.length())); |
+ |
+ m_listener = v8::Persistent<v8::Function>::New(listenerFunction); |
+#ifndef NDEBUG |
+ V8Proxy::RegisterGlobalHandle(EVENT_LISTENER, this, m_listener); |
+#endif |
+ } |
+ } |
+ } |
+ |
+ ASSERT(m_listener.IsEmpty() || m_listener->IsFunction()); |
+ return m_listener.IsEmpty() ? v8::Local<v8::Function>() : v8::Local<v8::Function>::New(v8::Persistent<v8::Function>::Cast(m_listener)); |
+} |
+ |
+v8::Local<v8::Value> V8LazyEventListener::callListenerFunction(v8::Handle<v8::Value> jsEvent, Event* event, bool isWindowEvent) |
+{ |
+ v8::Local<v8::Function> handlerFunction = getWrappedListenerFunction(); |
+ v8::Local<v8::Object> receiver = getReceiverObject(event, isWindowEvent); |
+ if (handlerFunction.IsEmpty() || receiver.IsEmpty()) |
+ return v8::Local<v8::Value>(); |
+ |
+ v8::Handle<v8::Value> parameters[1] = { jsEvent }; |
+ |
+ V8Proxy* proxy = V8Proxy::retrieve(m_frame); |
+ return proxy->CallFunction(handlerFunction, receiver, 1, parameters); |
+} |
+ |
+v8::Local<v8::Function> V8LazyEventListener::getWrappedListenerFunction() |
+{ |
+ if (m_wrappedFunctionCompiled) { |
+ ASSERT(m_wrappedFunction.IsEmpty() || m_wrappedFunction->IsFunction()); |
+ return m_wrappedFunction.IsEmpty() ? v8::Local<v8::Function>() : v8::Local<v8::Function>::New(m_wrappedFunction); |
+ } |
+ |
+ m_wrappedFunctionCompiled = true; |
+ |
+ { |
+ // Switch to the context of m_frame. |
+ v8::HandleScope handleScope; |
+ |
+ // Use the outer scope to hold context. |
+ v8::Handle<v8::Context> context = V8Proxy::GetContext(m_frame); |
+ // Bail out if we cannot get the context. |
+ if (context.IsEmpty()) |
+ return v8::Local<v8::Function>(); |
+ |
+ v8::Context::Scope scope(context); |
+ |
+ // FIXME: cache the wrapper function. |
+ String code = "(function (evt) {\n"; |
+ |
+ // Nodes other than the document object, when executing inline event handlers push document, form, and the target node on the scope chain. |
+ // We do this by using 'with' statement. |
+ // See chrome/fast/forms/form-action.html |
+ // chrome/fast/forms/selected-index-value.html |
+ // base/fast/overflow/onscroll-layer-self-destruct.html |
+ code.append(" with (this.ownerDocument ? this.ownerDocument : {}) {\n"); |
+ code.append(" with (this.form ? this.form : {}) {\n"); |
+ code.append(" with (this) {\n"); |
+ code.append(" return (function(evt){"); |
+ code.append(m_code); |
+ code.append("\n}).call(this, evt);\n"); |
+ code.append(" }\n"); |
+ code.append(" }\n"); |
+ code.append(" }\n"); |
+ code.append("})"); |
+ v8::Handle<v8::String> codeExternalString = v8ExternalString(code); |
+ v8::Handle<v8::Script> script = V8Proxy::CompileScript(codeExternalString, m_frame->document()->url(), m_lineNumber - 4); |
+ if (!script.IsEmpty()) { |
+ V8Proxy* proxy = V8Proxy::retrieve(m_frame); |
+ ASSERT(proxy); |
+ v8::Local<v8::Value> value = proxy->RunScript(script, false); |
+ if (!value.IsEmpty()) { |
+ ASSERT(value->IsFunction()); |
+ |
+ m_wrappedFunction = v8::Persistent<v8::Function>::New(v8::Local<v8::Function>::Cast(value)); |
+#ifndef NDEBUG |
+ V8Proxy::RegisterGlobalHandle(EVENT_LISTENER, this, m_wrappedFunction); |
+#endif |
+ m_wrappedFunction->SetName(v8::String::New(fromWebCoreString(m_functionName), m_functionName.length())); |
+ } |
+ } |
+ } |
+ |
+ return v8::Local<v8::Function>::New(m_wrappedFunction); |
+} |
+ |
+} // namespace WebCore |