Introducing ClipboardEvent Constructor

Source/core/events/ClipboardEvent.cpp

 /*
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2005, 2006, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "core/events/ClipboardEvent.h"
+#include "core/clipboard/DataObject.h"
 
 namespace blink {
 
 ClipboardEvent::ClipboardEvent()
 {
 }
 
 ClipboardEvent::ClipboardEvent(const AtomicString& eventType, bool canBubble, bool cancelable, DataTransfer* clipboardData)
     : Event(eventType, canBubble, cancelable), m_clipboardData(clipboardData)
 {
 }
 
+ClipboardEvent::ClipboardEvent(const AtomicString& type, const ClipboardEventInit& initializer)
+    : Event(type, initializer)
+{
+    DataTransferAccessPolicy policy = DataTransferNumb;
+
+    if (type == EventTypeNames::copy || type == EventTypeNames::cut || type == EventTypeNames::paste)
+        policy = DataTransferWritable;
+
+    m_clipboardData = DataTransfer::create(DataTransfer::CopyAndPaste, policy, DataObject::create());
+    if (initializer.hasDataType())

[philipj_slow, 2015/06/26 22:37:44]

The hasDataType() isn't needed because this member has a default value in the
IDL.

Also, the spec expresses this differently, and is pretty weird to me. As part of
"fire a clipboard event" it checks if the event is trusted and uses the data and
dataType arguments from the constructor without actually storing somewhere in
the interim. If actually implemented like this, we'd have to add the entry to
the DataTransferItemList when the event is fired, not in the constructor.

Also strange is that there's no way to actually run the "fire a clipboard event"
algorithm from scripts, all of the entry points look like they're for actual
copy/paste/cut actions.

+        m_clipboardData->setData(initializer.dataType(), initializer.data());
+}
+
 ClipboardEvent::~ClipboardEvent()
 {
 }
 
 const AtomicString& ClipboardEvent::interfaceName() const
 {
     return EventNames::ClipboardEvent;
 }
 
 bool ClipboardEvent::isClipboardEvent() const
 {
     return true;
 }
 
 DEFINE_TRACE(ClipboardEvent)
 {
     visitor->trace(m_clipboardData);
     Event::trace(visitor);
 }
 
 } // namespace blink