Source/web/WebPluginContainerImpl.cpp

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This source file includes following definitions.
setFrameRect
paint
invalidateRect
setFocus
show
hide
eventHasUserGesture
handleEvent
frameRectsChanged
widgetPositionsUpdated
eventListenersRemoved
setParentVisible
setParent
setPlugin
deviceScaleFactor
pageScaleFactor
pageZoomFactor
setWebLayer
supportsPaginatedPrint
isPrintScalingDisabled
printBegin
printPage
printEnd
copy
executeEditCommand
executeEditCommand
element
invalidate
invalidateRect
scrollRect
reportGeometry
allowScriptObjects
clearScriptObjects
scriptableObjectForElement
executeScriptURL
loadFrameRequest
zoomLevelChanged
isRectTopmost
requestTouchEventType
setWantsWheelEvents
windowToLocalPoint
localToWindowPoint
didReceiveResponse
didReceiveData
didFinishLoading
didFailLoading
platformLayer
scriptableObject
getFormValue
supportsKeyboardFocus
supportsInputMethod
canProcessDrag
wantsWheelEvents
willDestroyPluginLoadObserver
scrollbarGroup
willStartLiveResize
willEndLiveResize
paintCustomOverhangArea
m_wantsWheelEvents
handleMouseEvent
handleDragEvent
handleWheelEvent
handleKeyboardEvent
handleTouchEvent
gestureScrollHelper
handleGestureEvent
synthesizeMouseEventIfPossible
focusPlugin
calculateGeometry
windowClipRect
pluginShouldPersist
/*
 * Copyright (C) 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 "WebPluginContainerImpl.h"

#include "ChromeClientImpl.h"
#include "ScrollbarGroup.h"
#include "WebDataSourceImpl.h"
#include "WebElement.h"
#include "WebInputEvent.h"
#include "WebInputEventConversion.h"
#include "WebPlugin.h"
#include "WebViewClient.h"
#include "WebViewImpl.h"
#include "core/page/Chrome.h"
#include "core/page/EventHandler.h"
#include "platform/exported/WrappedResourceResponse.h"

#include "HTMLNames.h"
#include "WebPrintParams.h"
#include "bindings/v8/ScriptController.h"
#include "core/clipboard/Clipboard.h"
#include "core/clipboard/DataObject.h"
#include "core/events/GestureEvent.h"
#include "core/events/KeyboardEvent.h"
#include "core/events/MouseEvent.h"
#include "core/events/TouchEvent.h"
#include "core/events/WheelEvent.h"
#include "core/html/HTMLFormElement.h"
#include "core/html/HTMLPlugInElement.h"
#include "core/loader/FormState.h"
#include "core/loader/FrameLoadRequest.h"
#include "core/page/FocusController.h"
#include "core/frame/FrameView.h"
#include "core/frame/LocalFrame.h"
#include "core/page/Page.h"
#include "core/page/scrolling/ScrollingCoordinator.h"
#include "core/plugins/PluginOcclusionSupport.h"
#include "core/rendering/HitTestResult.h"
#include "core/rendering/RenderBox.h"
#include "platform/HostWindow.h"
#include "platform/KeyboardCodes.h"
#include "platform/PlatformGestureEvent.h"
#include "platform/UserGestureIndicator.h"
#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/GraphicsLayer.h"
#include "platform/scroll/ScrollAnimator.h"
#include "platform/scroll/ScrollView.h"
#include "platform/scroll/ScrollbarTheme.h"
#include "public/platform/Platform.h"
#include "public/platform/WebClipboard.h"
#include "public/platform/WebCompositorSupport.h"
#include "public/platform/WebCursorInfo.h"
#include "public/platform/WebDragData.h"
#include "public/platform/WebExternalTextureLayer.h"
#include "public/platform/WebRect.h"
#include "public/platform/WebString.h"
#include "public/platform/WebURL.h"
#include "public/platform/WebURLError.h"
#include "public/platform/WebURLRequest.h"
#include "public/platform/WebVector.h"

using namespace WebCore;

namespace blink {

// Public methods --------------------------------------------------------------

void WebPluginContainerImpl::setFrameRect(const IntRect& frameRect)
{
    Widget::setFrameRect(frameRect);
    reportGeometry();
}

void WebPluginContainerImpl::paint(GraphicsContext* gc, const IntRect& damageRect)
{
    if (gc->updatingControlTints() && m_scrollbarGroup) {
        // See comment in FrameView::updateControlTints().
        if (m_scrollbarGroup->horizontalScrollbar())
            m_scrollbarGroup->horizontalScrollbar()->invalidate();
        if (m_scrollbarGroup->verticalScrollbar())
            m_scrollbarGroup->verticalScrollbar()->invalidate();
    }

    if (gc->paintingDisabled())
        return;

    if (!parent())
        return;

    // Don't paint anything if the plugin doesn't intersect the damage rect.
    if (!frameRect().intersects(damageRect))
        return;

    gc->save();

    ASSERT(parent()->isFrameView());
    ScrollView* view =  toScrollView(parent());

    // The plugin is positioned in window coordinates, so it needs to be painted
    // in window coordinates.
    IntPoint origin = view->contentsToWindow(IntPoint(0, 0));
    gc->translate(static_cast<float>(-origin.x()), static_cast<float>(-origin.y()));

    WebCanvas* canvas = gc->canvas();

    IntRect windowRect = view->contentsToWindow(damageRect);
    m_webPlugin->paint(canvas, windowRect);

    gc->restore();
}

void WebPluginContainerImpl::invalidateRect(const IntRect& rect)
{
    if (!parent())
        return;

    RenderBox* renderer = toRenderBox(m_element->renderer());

    IntRect dirtyRect = rect;
    dirtyRect.move(renderer->borderLeft() + renderer->paddingLeft(),
                   renderer->borderTop() + renderer->paddingTop());
    renderer->repaintRectangle(dirtyRect);
}

void WebPluginContainerImpl::setFocus(bool focused)
{
    Widget::setFocus(focused);
    m_webPlugin->updateFocus(focused);
}

void WebPluginContainerImpl::show()
{
    setSelfVisible(true);
    m_webPlugin->updateVisibility(true);

    Widget::show();
}

void WebPluginContainerImpl::hide()
{
    setSelfVisible(false);
    m_webPlugin->updateVisibility(false);

    Widget::hide();
}

static bool eventHasUserGesture(const WebInputEvent* webEvent, const Event* event)
{
    if (!WebInputEvent::isUserGestureEventType(webEvent->type))
        return false;
    if (WebInputEvent::isKeyboardEventType(webEvent->type))
        return event->isKeyboardEvent();
    switch (webEvent->type) {
    case WebInputEvent::MouseDown:
        return event->type() == EventTypeNames::mousedown;
    case WebInputEvent::MouseUp:
        return event->type() == EventTypeNames::mouseup;
    case WebInputEvent::TouchStart:
        return event->type() == EventTypeNames::touchstart;
    case WebInputEvent::TouchEnd:
        return event->type() == EventTypeNames::touchend;
    default:
        return false;
    }
}

void WebPluginContainerImpl::handleEvent(Event* event)
{
    if (!m_webPlugin->acceptsInputEvents())
        return;

    const WebInputEvent* currentInputEvent = WebViewImpl::currentInputEvent();
    UserGestureIndicator gestureIndicator(currentInputEvent && eventHasUserGesture(currentInputEvent, event) ? DefinitelyProcessingUserGesture : PossiblyProcessingUserGesture);

    RefPtr<WebPluginContainerImpl> protector(this);
    // The events we pass are defined at:
    //    http://devedge-temp.mozilla.org/library/manuals/2002/plugin/1.0/structures5.html#1000000
    // Don't take the documentation as truth, however.  There are many cases
    // where mozilla behaves differently than the spec.
    if (event->isMouseEvent())
        handleMouseEvent(toMouseEvent(event));
    else if (event->isWheelEvent())
        handleWheelEvent(toWheelEvent(event));
    else if (event->isKeyboardEvent())
        handleKeyboardEvent(toKeyboardEvent(event));
    else if (event->isTouchEvent())
        handleTouchEvent(toTouchEvent(event));
    else if (event->isGestureEvent())
        handleGestureEvent(toGestureEvent(event));

    // FIXME: it would be cleaner if Widget::handleEvent returned true/false and
    // HTMLPluginElement called setDefaultHandled or defaultEventHandler.
    if (!event->defaultHandled())
        m_element->Node::defaultEventHandler(event);
}

void WebPluginContainerImpl::frameRectsChanged()
{
    Widget::frameRectsChanged();
    reportGeometry();
}

void WebPluginContainerImpl::widgetPositionsUpdated()
{
    Widget::widgetPositionsUpdated();
    reportGeometry();
}

void WebPluginContainerImpl::eventListenersRemoved()
{
    // We're no longer registered to receive touch events, so don't try to remove
    // the touch event handlers in our destructor.
    m_touchEventRequestType = TouchEventRequestTypeNone;
}

void WebPluginContainerImpl::setParentVisible(bool parentVisible)
{
    // We override this function to make sure that geometry updates are sent
    // over to the plugin. For e.g. when a plugin is instantiated it does not
    // have a valid parent. As a result the first geometry update from webkit
    // is ignored. This function is called when the plugin eventually gets a
    // parent.

    if (isParentVisible() == parentVisible)
        return;  // No change.

    Widget::setParentVisible(parentVisible);
    if (!isSelfVisible())
        return;  // This widget has explicitely been marked as not visible.

    m_webPlugin->updateVisibility(isVisible());
}

void WebPluginContainerImpl::setParent(Widget* widget)
{
    // We override this function so that if the plugin is windowed, we can call
    // NPP_SetWindow at the first possible moment.  This ensures that
    // NPP_SetWindow is called before the manual load data is sent to a plugin.
    // If this order is reversed, Flash won't load videos.

    Widget::setParent(widget);
    if (widget)
        reportGeometry();
    else if (m_webPlugin)
        m_webPlugin->containerDidDetachFromParent();
}

void WebPluginContainerImpl::setPlugin(WebPlugin* plugin)
{
    if (plugin != m_webPlugin) {
        m_element->resetInstance();
        m_webPlugin = plugin;
    }
}

float WebPluginContainerImpl::deviceScaleFactor()
{
    Page* page = m_element->document().page();
    if (!page)
        return 1.0;
    return page->deviceScaleFactor();
}

float WebPluginContainerImpl::pageScaleFactor()
{
    Page* page = m_element->document().page();
    if (!page)
        return 1.0;
    return page->pageScaleFactor();
}

float WebPluginContainerImpl::pageZoomFactor()
{
    LocalFrame* frame = m_element->document().frame();
    if (!frame)
        return 1.0;
    return frame->pageZoomFactor();
}

void WebPluginContainerImpl::setWebLayer(WebLayer* layer)
{
    if (m_webLayer == layer)
        return;

    // If anyone of the layers is null we need to switch between hardware
    // and software compositing.
    if (!m_webLayer || !layer)
        m_element->scheduleLayerUpdate();
    if (m_webLayer)
        GraphicsLayer::unregisterContentsLayer(m_webLayer);
    if (layer)
        GraphicsLayer::registerContentsLayer(layer);
    m_webLayer = layer;
}

bool WebPluginContainerImpl::supportsPaginatedPrint() const
{
    return m_webPlugin->supportsPaginatedPrint();
}

bool WebPluginContainerImpl::isPrintScalingDisabled() const
{
    return m_webPlugin->isPrintScalingDisabled();
}

int WebPluginContainerImpl::printBegin(const WebPrintParams& printParams) const
{
    return m_webPlugin->printBegin(printParams);
}

bool WebPluginContainerImpl::printPage(int pageNumber,
                                       WebCore::GraphicsContext* gc)
{
    gc->save();
    WebCanvas* canvas = gc->canvas();
    bool ret = m_webPlugin->printPage(pageNumber, canvas);
    gc->restore();
    return ret;
}

void WebPluginContainerImpl::printEnd()
{
    m_webPlugin->printEnd();
}

void WebPluginContainerImpl::copy()
{
    if (!m_webPlugin->hasSelection())
        return;

    blink::Platform::current()->clipboard()->writeHTML(m_webPlugin->selectionAsMarkup(), WebURL(), m_webPlugin->selectionAsText(), false);
}

bool WebPluginContainerImpl::executeEditCommand(const WebString& name)
{
    if (m_webPlugin->executeEditCommand(name))
        return true;

    if (name != "Copy")
        return false;

    copy();
    return true;
}

bool WebPluginContainerImpl::executeEditCommand(const WebString& name, const WebString& value)
{
    return m_webPlugin->executeEditCommand(name, value);
}

WebElement WebPluginContainerImpl::element()
{
    return WebElement(m_element);
}

void WebPluginContainerImpl::invalidate()
{
    Widget::invalidate();
}

void WebPluginContainerImpl::invalidateRect(const WebRect& rect)
{
    invalidateRect(static_cast<IntRect>(rect));
}

void WebPluginContainerImpl::scrollRect(int dx, int dy, const WebRect& rect)
{
    Widget* parentWidget = parent();
    if (parentWidget->isFrameView()) {
        FrameView* parentFrameView = toFrameView(parentWidget);
        if (!parentFrameView->isOverlapped()) {
            IntRect damageRect = convertToContainingWindow(static_cast<IntRect>(rect));
            IntSize scrollDelta(dx, dy);
            // scroll() only uses the second rectangle, clipRect, and ignores the first
            // rectangle.
            parent()->hostWindow()->scroll(scrollDelta, damageRect, damageRect);
            return;
        }
    }

    // Use slow scrolling instead.
    invalidateRect(rect);
}

void WebPluginContainerImpl::reportGeometry()
{
    if (!parent())
        return;

    IntRect windowRect, clipRect;
    Vector<IntRect> cutOutRects;
    calculateGeometry(frameRect(), windowRect, clipRect, cutOutRects);

    m_webPlugin->updateGeometry(windowRect, clipRect, cutOutRects, isVisible());

    if (m_scrollbarGroup) {
        m_scrollbarGroup->scrollAnimator()->contentsResized();
        m_scrollbarGroup->setFrameRect(frameRect());
    }
}

void WebPluginContainerImpl::allowScriptObjects()
{
}

void WebPluginContainerImpl::clearScriptObjects()
{
    LocalFrame* frame = m_element->document().frame();
    if (!frame)
        return;
    frame->script().cleanupScriptObjectsForPlugin(this);
}

NPObject* WebPluginContainerImpl::scriptableObjectForElement()
{
    return m_element->getNPObject();
}

WebString WebPluginContainerImpl::executeScriptURL(const WebURL& url, bool popupsAllowed)
{
    LocalFrame* frame = m_element->document().frame();
    if (!frame)
        return WebString();

    const KURL& kurl = url;
    ASSERT(kurl.protocolIs("javascript"));

    String script = decodeURLEscapeSequences(
        kurl.string().substring(strlen("javascript:")));

    UserGestureIndicator gestureIndicator(popupsAllowed ? DefinitelyProcessingNewUserGesture : PossiblyProcessingUserGesture);
    ScriptValue result = frame->script().executeScriptInMainWorldAndReturnValue(ScriptSourceCode(script));

    // Failure is reported as a null string.
    String resultStr;
    result.getString(resultStr);
    return resultStr;
}

void WebPluginContainerImpl::loadFrameRequest(const WebURLRequest& request, const WebString& target, bool notifyNeeded, void* notifyData)
{
    LocalFrame* frame = m_element->document().frame();
    if (!frame || !frame->loader().documentLoader())
        return;  // FIXME: send a notification in this case?

    if (notifyNeeded) {
        // FIXME: This is a bit of hack to allow us to observe completion of
        // our frame request.  It would be better to evolve FrameLoader to
        // support a completion callback instead.
        OwnPtr<WebPluginLoadObserver> observer = adoptPtr(new WebPluginLoadObserver(this, request.url(), notifyData));
        // FIXME: Calling get here is dangerous! What if observer is freed?
        m_pluginLoadObservers.append(observer.get());
        WebDataSourceImpl::setNextPluginLoadObserver(observer.release());
    }

    FrameLoadRequest frameRequest(frame->document(), request.toResourceRequest(), target);
    UserGestureIndicator gestureIndicator(request.hasUserGesture() ? DefinitelyProcessingNewUserGesture : PossiblyProcessingUserGesture);
    frame->loader().load(frameRequest);
}

void WebPluginContainerImpl::zoomLevelChanged(double zoomLevel)
{
    WebViewImpl* view = WebViewImpl::fromPage(m_element->document().frame()->page());
    view->fullFramePluginZoomLevelChanged(zoomLevel);
}

bool WebPluginContainerImpl::isRectTopmost(const WebRect& rect)
{
    LocalFrame* frame = m_element->document().frame();
    if (!frame)
        return false;

    // hitTestResultAtPoint() takes a padding rectangle.
    // FIXME: We'll be off by 1 when the width or height is even.
    IntRect documentRect(x() + rect.x, y() + rect.y, rect.width, rect.height);
    LayoutPoint center = documentRect.center();
    // Make the rect we're checking (the point surrounded by padding rects) contained inside the requested rect. (Note that -1/2 is 0.)
    LayoutSize padding((documentRect.width() - 1) / 2, (documentRect.height() - 1) / 2);
    HitTestResult result = frame->eventHandler().hitTestResultAtPoint(center, HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent, padding);
    const HitTestResult::NodeSet& nodes = result.rectBasedTestResult();
    if (nodes.size() != 1)
        return false;
    return nodes.first().get() == m_element;
}

void WebPluginContainerImpl::requestTouchEventType(TouchEventRequestType requestType)
{
    if (m_touchEventRequestType == requestType)
        return;

    if (requestType != TouchEventRequestTypeNone && m_touchEventRequestType == TouchEventRequestTypeNone)
        m_element->document().didAddTouchEventHandler(m_element);
    else if (requestType == TouchEventRequestTypeNone && m_touchEventRequestType != TouchEventRequestTypeNone)
        m_element->document().didRemoveTouchEventHandler(m_element);
    m_touchEventRequestType = requestType;
}

void WebPluginContainerImpl::setWantsWheelEvents(bool wantsWheelEvents)
{
    if (m_wantsWheelEvents == wantsWheelEvents)
        return;
    m_wantsWheelEvents = wantsWheelEvents;
    if (Page* page = m_element->document().page()) {
        if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator()) {
            if (parent() && parent()->isFrameView())
                scrollingCoordinator->notifyLayoutUpdated();
        }
    }
}

WebPoint WebPluginContainerImpl::windowToLocalPoint(const WebPoint& point)
{
    ScrollView* view = toScrollView(parent());
    if (!view)
        return point;
    WebPoint windowPoint = view->windowToContents(point);
    return roundedIntPoint(m_element->renderer()->absoluteToLocal(LayoutPoint(windowPoint), UseTransforms));
}

WebPoint WebPluginContainerImpl::localToWindowPoint(const WebPoint& point)
{
    ScrollView* view = toScrollView(parent());
    if (!view)
        return point;
    IntPoint absolutePoint = roundedIntPoint(m_element->renderer()->localToAbsolute(LayoutPoint(point), UseTransforms));
    return view->contentsToWindow(absolutePoint);
}

void WebPluginContainerImpl::didReceiveResponse(const ResourceResponse& response)
{
    // Make sure that the plugin receives window geometry before data, or else
    // plugins misbehave.
    frameRectsChanged();

    WrappedResourceResponse urlResponse(response);
    m_webPlugin->didReceiveResponse(urlResponse);
}

void WebPluginContainerImpl::didReceiveData(const char *data, int dataLength)
{
    m_webPlugin->didReceiveData(data, dataLength);
}

void WebPluginContainerImpl::didFinishLoading()
{
    m_webPlugin->didFinishLoading();
}

void WebPluginContainerImpl::didFailLoading(const ResourceError& error)
{
    m_webPlugin->didFailLoading(error);
}

WebLayer* WebPluginContainerImpl::platformLayer() const
{
    return m_webLayer;
}

NPObject* WebPluginContainerImpl::scriptableObject()
{
    return m_webPlugin->scriptableObject();
}

bool WebPluginContainerImpl::getFormValue(String& value)
{
    WebString webValue;
    if (m_webPlugin->getFormValue(webValue)) {
        value = webValue;
        return true;
    }
    return false;
}

bool WebPluginContainerImpl::supportsKeyboardFocus() const
{
    return m_webPlugin->supportsKeyboardFocus();
}

bool WebPluginContainerImpl::supportsInputMethod() const
{
    return m_webPlugin->supportsInputMethod();
}

bool WebPluginContainerImpl::canProcessDrag() const
{
    return m_webPlugin->canProcessDrag();
}

bool WebPluginContainerImpl::wantsWheelEvents()
{
    return m_wantsWheelEvents;
}

void WebPluginContainerImpl::willDestroyPluginLoadObserver(WebPluginLoadObserver* observer)
{
    size_t pos = m_pluginLoadObservers.find(observer);
    if (pos == kNotFound)
        return;
    m_pluginLoadObservers.remove(pos);
}

ScrollbarGroup* WebPluginContainerImpl::scrollbarGroup()
{
    if (!m_scrollbarGroup)
        m_scrollbarGroup = adoptPtr(new ScrollbarGroup(m_element->document().frame()->view(), frameRect()));
    return m_scrollbarGroup.get();
}

void WebPluginContainerImpl::willStartLiveResize()
{
    if (m_scrollbarGroup)
        m_scrollbarGroup->willStartLiveResize();
}

void WebPluginContainerImpl::willEndLiveResize()
{
    if (m_scrollbarGroup)
        m_scrollbarGroup->willEndLiveResize();
}

bool WebPluginContainerImpl::paintCustomOverhangArea(GraphicsContext* context, const IntRect& horizontalOverhangArea, const IntRect& verticalOverhangArea, const IntRect& dirtyRect)
{
    context->save();
    context->setFillColor(Color(0xCC, 0xCC, 0xCC));
    context->fillRect(intersection(horizontalOverhangArea, dirtyRect));
    context->fillRect(intersection(verticalOverhangArea, dirtyRect));
    context->restore();
    return true;
}

// Private methods -------------------------------------------------------------

WebPluginContainerImpl::WebPluginContainerImpl(WebCore::HTMLPlugInElement* element, WebPlugin* webPlugin)
    : m_element(element)
    , m_webPlugin(webPlugin)
    , m_webLayer(0)
    , m_touchEventRequestType(TouchEventRequestTypeNone)
    , m_wantsWheelEvents(false)
{
}

WebPluginContainerImpl::~WebPluginContainerImpl()
{
    if (m_touchEventRequestType != TouchEventRequestTypeNone)
        m_element->document().didRemoveTouchEventHandler(m_element);

    for (size_t i = 0; i < m_pluginLoadObservers.size(); ++i)
        m_pluginLoadObservers[i]->clearPluginContainer();
    m_webPlugin->destroy();
    if (m_webLayer)
        GraphicsLayer::unregisterContentsLayer(m_webLayer);
}

void WebPluginContainerImpl::handleMouseEvent(MouseEvent* event)
{
    ASSERT(parent()->isFrameView());

    if (event->isDragEvent()) {
        if (m_webPlugin->canProcessDrag())
            handleDragEvent(event);
        return;
    }

    // We cache the parent FrameView here as the plugin widget could be deleted
    // in the call to HandleEvent. See http://b/issue?id=1362948
    FrameView* parentView = toFrameView(parent());

    WebMouseEventBuilder webEvent(this, m_element->renderer(), *event);
    if (webEvent.type == WebInputEvent::Undefined)
        return;

    if (event->type() == EventTypeNames::mousedown)
        focusPlugin();

    if (m_scrollbarGroup) {
        // This needs to be set before the other callbacks in this scope, since
        // the scroll animator class might query the position in response.
        m_scrollbarGroup->setLastMousePosition(IntPoint(event->x(), event->y()));
        if (event->type() == EventTypeNames::mousemove)
            m_scrollbarGroup->scrollAnimator()->mouseMovedInContentArea();
        else if (event->type() == EventTypeNames::mouseover)
            m_scrollbarGroup->scrollAnimator()->mouseEnteredContentArea();
        else if (event->type() == EventTypeNames::mouseout)
            m_scrollbarGroup->scrollAnimator()->mouseExitedContentArea();
    }

    WebCursorInfo cursorInfo;
    if (m_webPlugin->handleInputEvent(webEvent, cursorInfo))
        event->setDefaultHandled();

    // A windowless plugin can change the cursor in response to a mouse move
    // event.  We need to reflect the changed cursor in the frame view as the
    // mouse is moved in the boundaries of the windowless plugin.
    Page* page = parentView->frame().page();
    if (!page)
        return;
    toChromeClientImpl(page->chrome().client()).setCursorForPlugin(cursorInfo);
}

void WebPluginContainerImpl::handleDragEvent(MouseEvent* event)
{
    ASSERT(event->isDragEvent());

    WebDragStatus dragStatus = WebDragStatusUnknown;
    if (event->type() == EventTypeNames::dragenter)
        dragStatus = WebDragStatusEnter;
    else if (event->type() == EventTypeNames::dragleave)
        dragStatus = WebDragStatusLeave;
    else if (event->type() == EventTypeNames::dragover)
        dragStatus = WebDragStatusOver;
    else if (event->type() == EventTypeNames::drop)
        dragStatus = WebDragStatusDrop;

    if (dragStatus == WebDragStatusUnknown)
        return;

    Clipboard* clipboard = event->dataTransfer();
    WebDragData dragData(clipboard->dataObject());
    WebDragOperationsMask dragOperationMask = static_cast<WebDragOperationsMask>(clipboard->sourceOperation());
    WebPoint dragScreenLocation(event->screenX(), event->screenY());
    WebPoint dragLocation(event->absoluteLocation().x() - location().x(), event->absoluteLocation().y() - location().y());

    m_webPlugin->handleDragStatusUpdate(dragStatus, dragData, dragOperationMask, dragLocation, dragScreenLocation);
}

void WebPluginContainerImpl::handleWheelEvent(WheelEvent* event)
{
    WebMouseWheelEventBuilder webEvent(this, m_element->renderer(), *event);
    if (webEvent.type == WebInputEvent::Undefined)
        return;

    WebCursorInfo cursorInfo;
    if (m_webPlugin->handleInputEvent(webEvent, cursorInfo))
        event->setDefaultHandled();
}

void WebPluginContainerImpl::handleKeyboardEvent(KeyboardEvent* event)
{
    WebKeyboardEventBuilder webEvent(*event);
    if (webEvent.type == WebInputEvent::Undefined)
        return;

    if (webEvent.type == WebInputEvent::KeyDown) {
#if OS(MACOSX)
        if (webEvent.modifiers == WebInputEvent::MetaKey
#else
        if (webEvent.modifiers == WebInputEvent::ControlKey
#endif
            && webEvent.windowsKeyCode == VKEY_C
            // Only copy if there's a selection, so that we only ever do this
            // for Pepper plugins that support copying.  Windowless NPAPI
            // plugins will get the event as before.
            && m_webPlugin->hasSelection()) {
            copy();
            event->setDefaultHandled();
            return;
        }
    }

    const WebInputEvent* currentInputEvent = WebViewImpl::currentInputEvent();

    // Copy stashed info over, and only copy here in order not to interfere
    // the ctrl-c logic above.
    if (currentInputEvent
        && WebInputEvent::isKeyboardEventType(currentInputEvent->type)) {
        webEvent.modifiers |= currentInputEvent->modifiers &
            (WebInputEvent::CapsLockOn | WebInputEvent::NumLockOn);
    }

    // Give the client a chance to issue edit comamnds.
    WebViewImpl* view = WebViewImpl::fromPage(m_element->document().frame()->page());
    if (m_webPlugin->supportsEditCommands() && view->client())
        view->client()->handleCurrentKeyboardEvent();

    WebCursorInfo cursorInfo;
    if (m_webPlugin->handleInputEvent(webEvent, cursorInfo))
        event->setDefaultHandled();
}

void WebPluginContainerImpl::handleTouchEvent(TouchEvent* event)
{
    switch (m_touchEventRequestType) {
    case TouchEventRequestTypeNone:
        return;
    case TouchEventRequestTypeRaw: {
        WebTouchEventBuilder webEvent(this, m_element->renderer(), *event);
        if (webEvent.type == WebInputEvent::Undefined)
            return;

        if (event->type() == EventTypeNames::touchstart)
            focusPlugin();

        WebCursorInfo cursorInfo;
        if (m_webPlugin->handleInputEvent(webEvent, cursorInfo))
            event->setDefaultHandled();
        // FIXME: Can a plugin change the cursor from a touch-event callback?
        return;
    }
    case TouchEventRequestTypeSynthesizedMouse:
        synthesizeMouseEventIfPossible(event);
        return;
    }
}

static inline bool gestureScrollHelper(ScrollbarGroup* scrollbarGroup, ScrollDirection positiveDirection, ScrollDirection negativeDirection, float delta)
{
    if (!delta)
        return false;
    float absDelta = delta > 0 ? delta : -delta;
    return scrollbarGroup->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPrecisePixel, absDelta);
}

void WebPluginContainerImpl::handleGestureEvent(GestureEvent* event)
{
    WebGestureEventBuilder webEvent(this, m_element->renderer(), *event);
    if (webEvent.type == WebInputEvent::Undefined)
        return;
    WebCursorInfo cursorInfo;
    if (m_webPlugin->handleInputEvent(webEvent, cursorInfo)) {
        event->setDefaultHandled();
        return;
    }

    if (webEvent.type == WebInputEvent::GestureScrollUpdate || webEvent.type == WebInputEvent::GestureScrollUpdateWithoutPropagation) {
        if (!m_scrollbarGroup)
            return;
        if (gestureScrollHelper(m_scrollbarGroup.get(), ScrollLeft, ScrollRight, webEvent.data.scrollUpdate.deltaX))
            event->setDefaultHandled();
        if (gestureScrollHelper(m_scrollbarGroup.get(), ScrollUp, ScrollDown, webEvent.data.scrollUpdate.deltaY))
            event->setDefaultHandled();
    }
    // FIXME: Can a plugin change the cursor from a touch-event callback?
}

void WebPluginContainerImpl::synthesizeMouseEventIfPossible(TouchEvent* event)
{
    WebMouseEventBuilder webEvent(this, m_element->renderer(), *event);
    if (webEvent.type == WebInputEvent::Undefined)
        return;

    WebCursorInfo cursorInfo;
    if (m_webPlugin->handleInputEvent(webEvent, cursorInfo))
        event->setDefaultHandled();
}

void WebPluginContainerImpl::focusPlugin()
{
    LocalFrame& containingFrame = toFrameView(parent())->frame();
    if (Page* currentPage = containingFrame.page())
        currentPage->focusController().setFocusedElement(m_element, &containingFrame);
    else
        containingFrame.document()->setFocusedElement(m_element);
}

void WebPluginContainerImpl::calculateGeometry(const IntRect& frameRect,
                                               IntRect& windowRect,
                                               IntRect& clipRect,
                                               Vector<IntRect>& cutOutRects)
{
    windowRect = toScrollView(parent())->contentsToWindow(frameRect);

    // Calculate a clip-rect so that we don't overlap the scrollbars, etc.
    clipRect = windowClipRect();
    clipRect.move(-windowRect.x(), -windowRect.y());

    getPluginOcclusions(m_element, this->parent(), frameRect, cutOutRects);
    // Convert to the plugin position.
    for (size_t i = 0; i < cutOutRects.size(); i++)
        cutOutRects[i].move(-frameRect.x(), -frameRect.y());
}

WebCore::IntRect WebPluginContainerImpl::windowClipRect() const
{
    // Start by clipping to our bounds.
    IntRect clipRect =
        convertToContainingWindow(IntRect(0, 0, width(), height()));

    // document().renderer() can be 0 when we receive messages from the
    // plugins while we are destroying a frame.
    // FIXME: Can we just check m_element->document().isActive() ?
    if (m_element->renderer()->document().renderer()) {
        // Take our element and get the clip rect from the enclosing layer and
        // frame view.
        clipRect.intersect(
            m_element->document().view()->windowClipRectForFrameOwner(m_element));
    }

    return clipRect;
}

bool WebPluginContainerImpl::pluginShouldPersist() const
{
    return m_webPlugin->shouldPersist();
}

} // namespace blink
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root/Source/web/WebPluginContainerImpl.cpp

DEFINITIONS
