| OLD | NEW |
|---|
| (Empty) |
| 1 /* | |
| 2 * Copyright (C) 2006, 2007, 2008, 2009 Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions are | |
| 6 * met: | |
| 7 * | |
| 8 * * Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * * Redistributions in binary form must reproduce the above | |
| 11 * copyright notice, this list of conditions and the following disclaimer | |
| 12 * in the documentation and/or other materials provided with the | |
| 13 * distribution. | |
| 14 * * Neither the name of Google Inc. nor the names of its | |
| 15 * contributors may be used to endorse or promote products derived from | |
| 16 * this software without specific prior written permission. | |
| 17 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #include "config.h" | |
| 32 #include "V8AbstractEventListener.h" | |
| 33 | |
| 34 #include "Document.h" | |
| 35 #include "Event.h" | |
| 36 #include "Frame.h" | |
| 37 #include "Tokenizer.h" | |
| 38 #include "V8Binding.h" | |
| 39 | |
| 40 namespace WebCore { | |
| 41 | |
| 42 V8AbstractEventListener::V8AbstractEventListener(Frame* frame, bool isInline) | |
| 43 : m_isInline(isInline) | |
| 44 , m_frame(frame) | |
| 45 , m_lineNumber(0) | |
| 46 , m_columnNumber(0) | |
| 47 { | |
| 48 if (!m_frame) | |
| 49 return; | |
| 50 | |
| 51 // Get the position in the source if any. | |
| 52 if (m_isInline && m_frame->document()->tokenizer()) { | |
| 53 m_lineNumber = m_frame->document()->tokenizer()->lineNumber(); | |
| 54 m_columnNumber = m_frame->document()->tokenizer()->columnNumber(); | |
| 55 } | |
| 56 } | |
| 57 | |
| 58 void V8AbstractEventListener::invokeEventHandler(v8::Handle<v8::Context> context
, Event* event, bool isWindowEvent) | |
| 59 { | |
| 60 // Enter the V8 context in which to perform the event handling. | |
| 61 v8::Context::Scope scope(context); | |
| 62 | |
| 63 // Get the V8 wrapper for the event object. | |
| 64 v8::Handle<v8::Value> jsEvent = V8Proxy::EventToV8Object(event); | |
| 65 | |
| 66 // For compatibility, we store the event object as a property on the window
called "event". Because this is the global namespace, we save away any | |
| 67 // existing "event" property, and then restore it after executing the javasc
ript handler. | |
| 68 v8::Local<v8::String> eventSymbol = v8::String::NewSymbol("event"); | |
| 69 v8::Local<v8::Value> returnValue; | |
| 70 | |
| 71 { | |
| 72 // Catch exceptions thrown in the event handler so they do not propagate
to javascript code that caused the event to fire. | |
| 73 // Setting and getting the 'event' property on the global object can thr
ow exceptions as well (for instance if accessors that | |
| 74 // throw exceptions are defined for 'event' using __defineGetter__ and _
_defineSetter__ on the global object). | |
| 75 v8::TryCatch tryCatch; | |
| 76 tryCatch.SetVerbose(true); | |
| 77 | |
| 78 // Save the old 'event' property so we can restore it later. | |
| 79 v8::Local<v8::Value> savedEvent = context->Global()->Get(eventSymbol); | |
| 80 tryCatch.Reset(); | |
| 81 | |
| 82 // Make the event available in the window object. | |
| 83 // | |
| 84 // FIXME: This does not work as it does with jsc bindings if the window.
event property is already set. We need to make sure that property | |
| 85 // access is intercepted correctly. | |
| 86 context->Global()->Set(eventSymbol, jsEvent); | |
| 87 tryCatch.Reset(); | |
| 88 | |
| 89 // Call the event handler. | |
| 90 returnValue = callListenerFunction(jsEvent, event, isWindowEvent); | |
| 91 tryCatch.Reset(); | |
| 92 | |
| 93 // Restore the old event. This must be done for all exit paths through t
his method. | |
| 94 if (savedEvent.IsEmpty()) | |
| 95 context->Global()->Set(eventSymbol, v8::Undefined()); | |
| 96 else | |
| 97 context->Global()->Set(eventSymbol, savedEvent); | |
| 98 tryCatch.Reset(); | |
| 99 } | |
| 100 | |
| 101 ASSERT(!V8Proxy::HandleOutOfMemory() || returnValue.IsEmpty()); | |
| 102 | |
| 103 if (returnValue.IsEmpty()) | |
| 104 return; | |
| 105 | |
| 106 if (!returnValue->IsNull() && !returnValue->IsUndefined() && event->storesRe
sultAsString()) | |
| 107 event->storeResult(toWebCoreString(returnValue)); | |
| 108 | |
| 109 // Prevent default action if the return value is false; | |
| 110 // FIXME: Add example, and reference to bug entry. | |
| 111 if (m_isInline && returnValue->IsBoolean() && !returnValue->BooleanValue()) | |
| 112 event->preventDefault(); | |
| 113 } | |
| 114 | |
| 115 void V8AbstractEventListener::handleEvent(Event* event, bool isWindowEvent) | |
| 116 { | |
| 117 // EventListener could be disconnected from the frame. | |
| 118 if (disconnected()) | |
| 119 return; | |
| 120 | |
| 121 // The callback function on XMLHttpRequest can clear the event listener and
destroys 'this' object. Keep a local reference to it. | |
| 122 // See issue 889829. | |
| 123 RefPtr<V8AbstractEventListener> protect(this); | |
| 124 | |
| 125 v8::HandleScope handleScope; | |
| 126 | |
| 127 v8::Handle<v8::Context> context = V8Proxy::GetContext(m_frame); | |
| 128 if (context.IsEmpty()) | |
| 129 return; | |
| 130 | |
| 131 // m_frame can removed by the callback function, protect it until the callba
ck function returns. | |
| 132 RefPtr<Frame> protectFrame(m_frame); | |
| 133 | |
| 134 invokeEventHandler(context, event, isWindowEvent); | |
| 135 | |
| 136 Document::updateDocumentsRendering(); | |
| 137 } | |
| 138 | |
| 139 void V8AbstractEventListener::disposeListenerObject() | |
| 140 { | |
| 141 if (!m_listener.IsEmpty()) { | |
| 142 #ifndef NDEBUG | |
| 143 V8Proxy::UnregisterGlobalHandle(this, m_listener); | |
| 144 #endif | |
| 145 m_listener.Dispose(); | |
| 146 m_listener.Clear(); | |
| 147 } | |
| 148 } | |
| 149 | |
| 150 v8::Local<v8::Object> V8AbstractEventListener::getReceiverObject(Event* event, b
ool isWindowEvent) | |
| 151 { | |
| 152 if (!m_listener.IsEmpty() && !m_listener->IsFunction()) | |
| 153 return v8::Local<v8::Object>::New(m_listener); | |
| 154 | |
| 155 if (isWindowEvent) | |
| 156 return v8::Context::GetCurrent()->Global(); | |
| 157 | |
| 158 EventTarget* target = event->currentTarget(); | |
| 159 v8::Handle<v8::Value> value = V8Proxy::EventTargetToV8Object(target); | |
| 160 if (value.IsEmpty()) | |
| 161 return v8::Local<v8::Object>(); | |
| 162 return v8::Local<v8::Object>::New(v8::Handle<v8::Object>::Cast(value)); | |
| 163 } | |
| 164 | |
| 165 } // namespace WebCore | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 46097:
WebKit merge 41660:41709 (WebKit side).... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/