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/**
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Stefan Schimanski (1Stein@gmx.de)
* Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
*
* 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/html/HTMLPlugInElement.h"
#include "CSSPropertyNames.h"
#include "HTMLNames.h"
#include "bindings/v8/ScriptController.h"
#include "bindings/v8/npruntime_impl.h"
#include "core/dom/Document.h"
#include "core/dom/Event.h"
#include "core/page/EventHandler.h"
#include "core/page/Frame.h"
#include "core/platform/Widget.h"
#include "core/plugins/PluginView.h"
#include "core/rendering/RenderEmbeddedObject.h"
#include "core/rendering/RenderWidget.h"
#include "wtf/UnusedParam.h"
namespace WebCore {
using namespace HTMLNames;
HTMLPlugInElement::HTMLPlugInElement(const QualifiedName& tagName, Document& doc)
: HTMLFrameOwnerElement(tagName, doc)
, m_NPObject(0)
, m_isCapturingMouseEvents(false)
, m_inBeforeLoadEventHandler(false)
, m_displayState(Playing)
{
}
HTMLPlugInElement::~HTMLPlugInElement()
{
ASSERT(!m_instance); // cleared in detach()
if (m_NPObject) {
_NPN_ReleaseObject(m_NPObject);
m_NPObject = 0;
}
}
bool HTMLPlugInElement::canProcessDrag() const
{
const PluginView* plugin = pluginWidget() && pluginWidget()->isPluginView() ? toPluginView(pluginWidget()) : 0;
return plugin ? plugin->canProcessDrag() : false;
}
bool HTMLPlugInElement::willRespondToMouseClickEvents()
{
if (isDisabledFormControl())
return false;
RenderObject* r = renderer();
if (!r)
return false;
if (!r->isEmbeddedObject() && !r->isWidget())
return false;
return true;
}
void HTMLPlugInElement::removeAllEventListeners()
{
HTMLFrameOwnerElement::removeAllEventListeners();
if (RenderWidget* renderer = existingRenderWidget()) {
if (Widget* widget = renderer->widget())
widget->eventListenersRemoved();
}
}
void HTMLPlugInElement::detach(const AttachContext& context)
{
m_instance.clear();
if (m_isCapturingMouseEvents) {
if (Frame* frame = document().frame())
frame->eventHandler()->setCapturingMouseEventsNode(0);
m_isCapturingMouseEvents = false;
}
if (m_NPObject) {
_NPN_ReleaseObject(m_NPObject);
m_NPObject = 0;
}
HTMLFrameOwnerElement::detach(context);
}
void HTMLPlugInElement::resetInstance()
{
m_instance.clear();
}
PassScriptInstance HTMLPlugInElement::getInstance()
{
Frame* frame = document().frame();
if (!frame)
return 0;
// If the host dynamically turns off JavaScript (or Java) we will still return
// the cached allocated Bindings::Instance. Not supporting this edge-case is OK.
if (m_instance)
return m_instance;
if (Widget* widget = pluginWidget())
m_instance = frame->script()->createScriptInstanceForWidget(widget);
return m_instance;
}
bool HTMLPlugInElement::dispatchBeforeLoadEvent(const String& sourceURL)
{
// FIXME: Our current plug-in loading design can't guarantee the following
// assertion is true, since plug-in loading can be initiated during layout,
// and synchronous layout can be initiated in a beforeload event handler!
// See <http://webkit.org/b/71264>.
// ASSERT(!m_inBeforeLoadEventHandler);
m_inBeforeLoadEventHandler = true;
bool beforeLoadAllowedLoad = HTMLFrameOwnerElement::dispatchBeforeLoadEvent(sourceURL);
m_inBeforeLoadEventHandler = false;
return beforeLoadAllowedLoad;
}
Widget* HTMLPlugInElement::pluginWidget() const
{
if (m_inBeforeLoadEventHandler) {
// The plug-in hasn't loaded yet, and it makes no sense to try to load if beforeload handler happened to touch the plug-in element.
// That would recursively call beforeload for the same element.
return 0;
}
RenderWidget* renderWidget = renderWidgetForJSBindings();
if (!renderWidget)
return 0;
return renderWidget->widget();
}
bool HTMLPlugInElement::isPresentationAttribute(const QualifiedName& name) const
{
if (name == widthAttr || name == heightAttr || name == vspaceAttr || name == hspaceAttr || name == alignAttr)
return true;
return HTMLFrameOwnerElement::isPresentationAttribute(name);
}
void HTMLPlugInElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStylePropertySet* style)
{
if (name == widthAttr)
addHTMLLengthToStyle(style, CSSPropertyWidth, value);
else if (name == heightAttr)
addHTMLLengthToStyle(style, CSSPropertyHeight, value);
else if (name == vspaceAttr) {
addHTMLLengthToStyle(style, CSSPropertyMarginTop, value);
addHTMLLengthToStyle(style, CSSPropertyMarginBottom, value);
} else if (name == hspaceAttr) {
addHTMLLengthToStyle(style, CSSPropertyMarginLeft, value);
addHTMLLengthToStyle(style, CSSPropertyMarginRight, value);
} else if (name == alignAttr)
applyAlignmentAttributeToStyle(value, style);
else
HTMLFrameOwnerElement::collectStyleForPresentationAttribute(name, value, style);
}
void HTMLPlugInElement::defaultEventHandler(Event* event)
{
// Firefox seems to use a fake event listener to dispatch events to plug-in (tested with mouse events only).
// This is observable via different order of events - in Firefox, event listeners specified in HTML attributes fires first, then an event
// gets dispatched to plug-in, and only then other event listeners fire. Hopefully, this difference does not matter in practice.
// FIXME: Mouse down and scroll events are passed down to plug-in via custom code in EventHandler; these code paths should be united.
RenderObject* r = renderer();
if (r && r->isEmbeddedObject()) {
if (toRenderEmbeddedObject(r)->showsUnavailablePluginIndicator())
return;
if (displayState() < Playing)
return;
}
if (!r || !r->isWidget())
return;
RefPtr<Widget> widget = toRenderWidget(r)->widget();
if (!widget)
return;
widget->handleEvent(event);
if (event->defaultHandled())
return;
HTMLFrameOwnerElement::defaultEventHandler(event);
}
RenderWidget* HTMLPlugInElement::renderWidgetForJSBindings() const
{
document().updateLayoutIgnorePendingStylesheets();
return existingRenderWidget();
}
bool HTMLPlugInElement::isKeyboardFocusable() const
{
if (!document().page())
return false;
const PluginView* plugin = pluginWidget() && pluginWidget()->isPluginView() ? toPluginView(pluginWidget()) : 0;
if (plugin)
return plugin->supportsKeyboardFocus();
return false;
}
bool HTMLPlugInElement::isPluginElement() const
{
return true;
}
bool HTMLPlugInElement::rendererIsFocusable() const
{
if (HTMLFrameOwnerElement::supportsFocus() && HTMLFrameOwnerElement::rendererIsFocusable())
return true;
if (useFallbackContent() || !renderer() || !renderer()->isEmbeddedObject())
return false;
return !toRenderEmbeddedObject(renderer())->showsUnavailablePluginIndicator();
}
NPObject* HTMLPlugInElement::getNPObject()
{
ASSERT(document().frame());
if (!m_NPObject)
m_NPObject = document().frame()->script()->createScriptObjectForPluginElement(this);
return m_NPObject;
}
}
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