1/*
2 * Copyright (C) 2009 Google Inc. All rights reserved.
3 * Copyright (C) 2014 Opera Software ASA. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include "config.h"
33#include "web/WebPluginContainerImpl.h"
34
35#include "bindings/core/v8/ScriptController.h"
36#include "bindings/core/v8/V8Element.h"
37#include "bindings/core/v8/V8NPObject.h"
38#include "core/HTMLNames.h"
39#include "core/clipboard/DataObject.h"
40#include "core/clipboard/DataTransfer.h"
41#include "core/events/GestureEvent.h"
42#include "core/events/KeyboardEvent.h"
43#include "core/events/MouseEvent.h"
44#include "core/events/TouchEvent.h"
45#include "core/events/WheelEvent.h"
46#include "core/frame/EventHandlerRegistry.h"
47#include "core/frame/FrameView.h"
48#include "core/frame/LocalFrame.h"
49#include "core/html/HTMLFormElement.h"
50#include "core/html/HTMLPlugInElement.h"
51#include "core/loader/FormState.h"
52#include "core/loader/FrameLoadRequest.h"
53#include "core/page/Chrome.h"
54#include "core/page/EventHandler.h"
55#include "core/page/FocusController.h"
56#include "core/page/Page.h"
57#include "core/page/scrolling/ScrollingCoordinator.h"
58#include "core/plugins/PluginOcclusionSupport.h"
59#include "core/rendering/HitTestResult.h"
60#include "core/rendering/RenderBox.h"
61#include "core/rendering/RenderLayer.h"
62#include "core/rendering/RenderPart.h"
63#include "platform/HostWindow.h"
64#include "platform/KeyboardCodes.h"
65#include "platform/PlatformGestureEvent.h"
66#include "platform/UserGestureIndicator.h"
67#include "platform/exported/WrappedResourceResponse.h"
68#include "platform/graphics/GraphicsContext.h"
69#include "platform/graphics/GraphicsLayer.h"
70#include "platform/scroll/ScrollAnimator.h"
71#include "platform/scroll/ScrollView.h"
72#include "platform/scroll/ScrollbarTheme.h"
73#include "public/platform/Platform.h"
74#include "public/platform/WebClipboard.h"
75#include "public/platform/WebCompositorSupport.h"
76#include "public/platform/WebCursorInfo.h"
77#include "public/platform/WebDragData.h"
78#include "public/platform/WebExternalTextureLayer.h"
79#include "public/platform/WebRect.h"
80#include "public/platform/WebString.h"
81#include "public/platform/WebURL.h"
82#include "public/platform/WebURLError.h"
83#include "public/platform/WebURLRequest.h"
84#include "public/platform/WebVector.h"
85#include "public/web/WebElement.h"
86#include "public/web/WebInputEvent.h"
87#include "public/web/WebPlugin.h"
88#include "public/web/WebPrintParams.h"
89#include "public/web/WebViewClient.h"
90#include "web/ChromeClientImpl.h"
91#include "web/ScrollbarGroup.h"
92#include "web/WebDataSourceImpl.h"
93#include "web/WebInputEventConversion.h"
94#include "web/WebViewImpl.h"
95#include "wtf/Assertions.h"
96
97namespace blink {
98
99// Public methods --------------------------------------------------------------
100
101void WebPluginContainerImpl::setFrameRect(const IntRect& frameRect)
102{
103    Widget::setFrameRect(frameRect);
104    reportGeometry();
105}
106
107void WebPluginContainerImpl::paint(GraphicsContext* gc, const IntRect& damageRect)
108{
109    if (!parent())
110        return;
111
112    // Don't paint anything if the plugin doesn't intersect the damage rect.
113    if (!frameRect().intersects(damageRect))
114        return;
115
116    gc->save();
117
118    ASSERT(parent()->isFrameView());
119    ScrollView* view =  toScrollView(parent());
120
121    // The plugin is positioned in window coordinates, so it needs to be painted
122    // in window coordinates.
123    IntPoint origin = view->contentsToWindow(IntPoint(0, 0));
124    gc->translate(static_cast<float>(-origin.x()), static_cast<float>(-origin.y()));
125
126    WebCanvas* canvas = gc->canvas();
127
128    IntRect windowRect = view->contentsToWindow(damageRect);
129    m_webPlugin->paint(canvas, windowRect);
130
131    gc->restore();
132}
133
134void WebPluginContainerImpl::invalidateRect(const IntRect& rect)
135{
136    if (!parent())
137        return;
138
139    RenderBox* renderer = toRenderBox(m_element->renderer());
140
141    IntRect dirtyRect = rect;
142    dirtyRect.move(renderer->borderLeft() + renderer->paddingLeft(),
143                   renderer->borderTop() + renderer->paddingTop());
144
145    // For querying RenderLayer::compositingState().
146    // This code should be correct.
147    DisableCompositingQueryAsserts disabler;
148    renderer->invalidatePaintRectangle(dirtyRect);
149}
150
151void WebPluginContainerImpl::setFocus(bool focused)
152{
153    Widget::setFocus(focused);
154    m_webPlugin->updateFocus(focused);
155}
156
157void WebPluginContainerImpl::show()
158{
159    setSelfVisible(true);
160    m_webPlugin->updateVisibility(true);
161
162    Widget::show();
163}
164
165void WebPluginContainerImpl::hide()
166{
167    setSelfVisible(false);
168    m_webPlugin->updateVisibility(false);
169
170    Widget::hide();
171}
172
173void WebPluginContainerImpl::handleEvent(Event* event)
174{
175    if (!m_webPlugin->acceptsInputEvents())
176        return;
177
178    RefPtr<WebPluginContainerImpl> protector(this);
179    // The events we pass are defined at:
180    //    http://devedge-temp.mozilla.org/library/manuals/2002/plugin/1.0/structures5.html#1000000
181    // Don't take the documentation as truth, however.  There are many cases
182    // where mozilla behaves differently than the spec.
183    if (event->isMouseEvent())
184        handleMouseEvent(toMouseEvent(event));
185    else if (event->isWheelEvent())
186        handleWheelEvent(toWheelEvent(event));
187    else if (event->isKeyboardEvent())
188        handleKeyboardEvent(toKeyboardEvent(event));
189    else if (event->isTouchEvent())
190        handleTouchEvent(toTouchEvent(event));
191    else if (event->isGestureEvent())
192        handleGestureEvent(toGestureEvent(event));
193
194    // FIXME: it would be cleaner if Widget::handleEvent returned true/false and
195    // HTMLPluginElement called setDefaultHandled or defaultEventHandler.
196    if (!event->defaultHandled())
197        m_element->Node::defaultEventHandler(event);
198}
199
200void WebPluginContainerImpl::frameRectsChanged()
201{
202    Widget::frameRectsChanged();
203    reportGeometry();
204}
205
206void WebPluginContainerImpl::widgetPositionsUpdated()
207{
208    Widget::widgetPositionsUpdated();
209    reportGeometry();
210}
211
212void WebPluginContainerImpl::eventListenersRemoved()
213{
214    // We're no longer registered to receive touch events, so don't try to remove
215    // the touch event handlers in our destructor.
216    m_touchEventRequestType = TouchEventRequestTypeNone;
217}
218
219void WebPluginContainerImpl::setParentVisible(bool parentVisible)
220{
221    // We override this function to make sure that geometry updates are sent
222    // over to the plugin. For e.g. when a plugin is instantiated it does not
223    // have a valid parent. As a result the first geometry update from webkit
224    // is ignored. This function is called when the plugin eventually gets a
225    // parent.
226
227    if (isParentVisible() == parentVisible)
228        return;  // No change.
229
230    Widget::setParentVisible(parentVisible);
231    if (!isSelfVisible())
232        return;  // This widget has explicitely been marked as not visible.
233
234    m_webPlugin->updateVisibility(isVisible());
235}
236
237void WebPluginContainerImpl::setParent(Widget* widget)
238{
239    // We override this function so that if the plugin is windowed, we can call
240    // NPP_SetWindow at the first possible moment.  This ensures that
241    // NPP_SetWindow is called before the manual load data is sent to a plugin.
242    // If this order is reversed, Flash won't load videos.
243
244    Widget::setParent(widget);
245    if (widget)
246        reportGeometry();
247    else if (m_webPlugin)
248        m_webPlugin->containerDidDetachFromParent();
249}
250
251void WebPluginContainerImpl::setPlugin(WebPlugin* plugin)
252{
253    if (plugin != m_webPlugin) {
254        m_element->resetInstance();
255        m_webPlugin = plugin;
256    }
257}
258
259float WebPluginContainerImpl::deviceScaleFactor()
260{
261    Page* page = m_element->document().page();
262    if (!page)
263        return 1.0;
264    return page->deviceScaleFactor();
265}
266
267float WebPluginContainerImpl::pageScaleFactor()
268{
269    Page* page = m_element->document().page();
270    if (!page)
271        return 1.0;
272    return page->pageScaleFactor();
273}
274
275float WebPluginContainerImpl::pageZoomFactor()
276{
277    LocalFrame* frame = m_element->document().frame();
278    if (!frame)
279        return 1.0;
280    return frame->pageZoomFactor();
281}
282
283void WebPluginContainerImpl::setWebLayer(WebLayer* layer)
284{
285    if (m_webLayer == layer)
286        return;
287
288    if (m_webLayer)
289        GraphicsLayer::unregisterContentsLayer(m_webLayer);
290    if (layer)
291        GraphicsLayer::registerContentsLayer(layer);
292
293    // If either of the layers is null we need to switch between hardware
294    // and software compositing.
295    bool needsCompositingUpdate = !m_webLayer || !layer;
296
297    m_webLayer = layer;
298
299    if (!needsCompositingUpdate)
300        return;
301
302#if ENABLE(OILPAN)
303    if (!m_element)
304        return;
305#endif
306
307    m_element->setNeedsCompositingUpdate();
308    // Being composited or not affects the self painting layer bit
309    // on the RenderLayer.
310    if (RenderPart* renderer = m_element->renderPart()) {
311        ASSERT(renderer->hasLayer());
312        renderer->layer()->updateSelfPaintingLayer();
313    }
314}
315
316bool WebPluginContainerImpl::supportsPaginatedPrint() const
317{
318    return m_webPlugin->supportsPaginatedPrint();
319}
320
321bool WebPluginContainerImpl::isPrintScalingDisabled() const
322{
323    return m_webPlugin->isPrintScalingDisabled();
324}
325
326int WebPluginContainerImpl::getCopiesToPrint() const
327{
328    return m_webPlugin->getCopiesToPrint();
329}
330
331int WebPluginContainerImpl::printBegin(const WebPrintParams& printParams) const
332{
333    return m_webPlugin->printBegin(printParams);
334}
335
336bool WebPluginContainerImpl::printPage(int pageNumber, GraphicsContext* gc)
337{
338    gc->save();
339    WebCanvas* canvas = gc->canvas();
340    bool ret = m_webPlugin->printPage(pageNumber, canvas);
341    gc->restore();
342    return ret;
343}
344
345void WebPluginContainerImpl::printEnd()
346{
347    m_webPlugin->printEnd();
348}
349
350void WebPluginContainerImpl::copy()
351{
352    if (!m_webPlugin->hasSelection())
353        return;
354
355    Platform::current()->clipboard()->writeHTML(m_webPlugin->selectionAsMarkup(), WebURL(), m_webPlugin->selectionAsText(), false);
356}
357
358bool WebPluginContainerImpl::executeEditCommand(const WebString& name)
359{
360    if (m_webPlugin->executeEditCommand(name))
361        return true;
362
363    if (name != "Copy")
364        return false;
365
366    copy();
367    return true;
368}
369
370bool WebPluginContainerImpl::executeEditCommand(const WebString& name, const WebString& value)
371{
372    return m_webPlugin->executeEditCommand(name, value);
373}
374
375WebElement WebPluginContainerImpl::element()
376{
377    return WebElement(m_element);
378}
379
380void WebPluginContainerImpl::invalidate()
381{
382    Widget::invalidate();
383}
384
385void WebPluginContainerImpl::invalidateRect(const WebRect& rect)
386{
387    invalidateRect(static_cast<IntRect>(rect));
388}
389
390void WebPluginContainerImpl::scrollRect(const WebRect& rect)
391{
392    invalidateRect(rect);
393}
394
395void WebPluginContainerImpl::reportGeometry()
396{
397    if (!parent())
398        return;
399
400    IntRect windowRect, clipRect;
401    Vector<IntRect> cutOutRects;
402    calculateGeometry(frameRect(), windowRect, clipRect, cutOutRects);
403
404    m_webPlugin->updateGeometry(windowRect, clipRect, cutOutRects, isVisible());
405
406    if (m_scrollbarGroup) {
407        m_scrollbarGroup->scrollAnimator()->contentsResized();
408        m_scrollbarGroup->setFrameRect(frameRect());
409    }
410}
411
412void WebPluginContainerImpl::allowScriptObjects()
413{
414}
415
416void WebPluginContainerImpl::clearScriptObjects()
417{
418    if (!frame())
419        return;
420
421    frame()->script().cleanupScriptObjectsForPlugin(this);
422}
423
424NPObject* WebPluginContainerImpl::scriptableObjectForElement()
425{
426    return m_element->getNPObject();
427}
428
429v8::Local<v8::Object> WebPluginContainerImpl::v8ObjectForElement()
430{
431    LocalFrame* frame = m_element->document().frame();
432    if (!frame)
433        return v8::Local<v8::Object>();
434
435    if (!frame->script().canExecuteScripts(NotAboutToExecuteScript))
436        return v8::Local<v8::Object>();
437
438    ScriptState* scriptState = ScriptState::forMainWorld(frame);
439    if (scriptState->contextIsValid())
440        return v8::Local<v8::Object>();
441
442    v8::Handle<v8::Value> v8value = toV8(m_element, scriptState->context()->Global(), scriptState->isolate());
443    ASSERT(v8value->IsObject());
444
445    return v8::Handle<v8::Object>::Cast(v8value);
446}
447
448WebString WebPluginContainerImpl::executeScriptURL(const WebURL& url, bool popupsAllowed)
449{
450    LocalFrame* frame = m_element->document().frame();
451    if (!frame)
452        return WebString();
453
454    const KURL& kurl = url;
455    ASSERT(kurl.protocolIs("javascript"));
456
457    String script = decodeURLEscapeSequences(
458        kurl.string().substring(strlen("javascript:")));
459
460    UserGestureIndicator gestureIndicator(popupsAllowed ? DefinitelyProcessingNewUserGesture : PossiblyProcessingUserGesture);
461    v8::HandleScope handleScope(toIsolate(frame));
462    v8::Local<v8::Value> result = frame->script().executeScriptInMainWorldAndReturnValue(ScriptSourceCode(script));
463
464    // Failure is reported as a null string.
465    if (result.IsEmpty() || !result->IsString())
466        return WebString();
467    return toCoreString(v8::Handle<v8::String>::Cast(result));
468}
469
470void WebPluginContainerImpl::loadFrameRequest(const WebURLRequest& request, const WebString& target, bool notifyNeeded, void* notifyData)
471{
472    LocalFrame* frame = m_element->document().frame();
473    if (!frame || !frame->loader().documentLoader())
474        return;  // FIXME: send a notification in this case?
475
476    if (notifyNeeded) {
477        // FIXME: This is a bit of hack to allow us to observe completion of
478        // our frame request.  It would be better to evolve FrameLoader to
479        // support a completion callback instead.
480        OwnPtr<WebPluginLoadObserver> observer = adoptPtr(new WebPluginLoadObserver(this, request.url(), notifyData));
481        // FIXME: Calling get here is dangerous! What if observer is freed?
482        m_pluginLoadObservers.append(observer.get());
483        WebDataSourceImpl::setNextPluginLoadObserver(observer.release());
484    }
485
486    FrameLoadRequest frameRequest(frame->document(), request.toResourceRequest(), target);
487    UserGestureIndicator gestureIndicator(request.hasUserGesture() ? DefinitelyProcessingNewUserGesture : PossiblyProcessingUserGesture);
488    frame->loader().load(frameRequest);
489}
490
491void WebPluginContainerImpl::zoomLevelChanged(double zoomLevel)
492{
493    WebViewImpl* view = WebViewImpl::fromPage(m_element->document().frame()->page());
494    view->fullFramePluginZoomLevelChanged(zoomLevel);
495}
496
497bool WebPluginContainerImpl::isRectTopmost(const WebRect& rect)
498{
499    LocalFrame* frame = m_element->document().frame();
500    if (!frame)
501        return false;
502
503    // hitTestResultAtPoint() takes a padding rectangle.
504    // FIXME: We'll be off by 1 when the width or height is even.
505    IntRect documentRect(x() + rect.x, y() + rect.y, rect.width, rect.height);
506    LayoutPoint center = documentRect.center();
507    // Make the rect we're checking (the point surrounded by padding rects) contained inside the requested rect. (Note that -1/2 is 0.)
508    LayoutSize padding((documentRect.width() - 1) / 2, (documentRect.height() - 1) / 2);
509    HitTestResult result = frame->eventHandler().hitTestResultAtPoint(center, HitTestRequest::ReadOnly | HitTestRequest::Active, padding);
510    const HitTestResult::NodeSet& nodes = result.rectBasedTestResult();
511    if (nodes.size() != 1)
512        return false;
513    return nodes.first().get() == m_element;
514}
515
516void WebPluginContainerImpl::requestTouchEventType(TouchEventRequestType requestType)
517{
518    if (m_touchEventRequestType == requestType)
519        return;
520
521    if (m_element->document().frameHost()) {
522        EventHandlerRegistry& registry = m_element->document().frameHost()->eventHandlerRegistry();
523        if (requestType != TouchEventRequestTypeNone && m_touchEventRequestType == TouchEventRequestTypeNone)
524            registry.didAddEventHandler(*m_element, EventHandlerRegistry::TouchEvent);
525        else if (requestType == TouchEventRequestTypeNone && m_touchEventRequestType != TouchEventRequestTypeNone)
526            registry.didRemoveEventHandler(*m_element, EventHandlerRegistry::TouchEvent);
527    }
528    m_touchEventRequestType = requestType;
529}
530
531void WebPluginContainerImpl::setWantsWheelEvents(bool wantsWheelEvents)
532{
533    if (m_wantsWheelEvents == wantsWheelEvents)
534        return;
535    m_wantsWheelEvents = wantsWheelEvents;
536    if (Page* page = m_element->document().page()) {
537        if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator()) {
538            if (parent() && parent()->isFrameView())
539                scrollingCoordinator->notifyLayoutUpdated();
540        }
541    }
542}
543
544WebPoint WebPluginContainerImpl::windowToLocalPoint(const WebPoint& point)
545{
546    ScrollView* view = toScrollView(parent());
547    if (!view)
548        return point;
549    WebPoint windowPoint = view->windowToContents(point);
550    return roundedIntPoint(m_element->renderer()->absoluteToLocal(LayoutPoint(windowPoint), UseTransforms));
551}
552
553WebPoint WebPluginContainerImpl::localToWindowPoint(const WebPoint& point)
554{
555    ScrollView* view = toScrollView(parent());
556    if (!view)
557        return point;
558    IntPoint absolutePoint = roundedIntPoint(m_element->renderer()->localToAbsolute(LayoutPoint(point), UseTransforms));
559    return view->contentsToWindow(absolutePoint);
560}
561
562void WebPluginContainerImpl::didReceiveResponse(const ResourceResponse& response)
563{
564    // Make sure that the plugin receives window geometry before data, or else
565    // plugins misbehave.
566    frameRectsChanged();
567
568    WrappedResourceResponse urlResponse(response);
569    m_webPlugin->didReceiveResponse(urlResponse);
570}
571
572void WebPluginContainerImpl::didReceiveData(const char *data, int dataLength)
573{
574    m_webPlugin->didReceiveData(data, dataLength);
575}
576
577void WebPluginContainerImpl::didFinishLoading()
578{
579    m_webPlugin->didFinishLoading();
580}
581
582void WebPluginContainerImpl::didFailLoading(const ResourceError& error)
583{
584    m_webPlugin->didFailLoading(error);
585}
586
587WebLayer* WebPluginContainerImpl::platformLayer() const
588{
589    return m_webLayer;
590}
591
592v8::Local<v8::Object> WebPluginContainerImpl::scriptableObject(v8::Isolate* isolate)
593{
594    v8::Local<v8::Object> object = m_webPlugin->v8ScriptableObject(isolate);
595    if (!object.IsEmpty()) {
596        // WebPlugin implementation can't provide the obsolete NPObject at the same time:
597        ASSERT(!m_webPlugin->scriptableObject());
598        return object;
599    }
600
601    NPObject* npObject = m_webPlugin->scriptableObject();
602    if (npObject)
603        return createV8ObjectForNPObject(npObject, 0, isolate);
604    return v8::Local<v8::Object>();
605}
606
607bool WebPluginContainerImpl::getFormValue(String& value)
608{
609    WebString webValue;
610    if (m_webPlugin->getFormValue(webValue)) {
611        value = webValue;
612        return true;
613    }
614    return false;
615}
616
617bool WebPluginContainerImpl::supportsKeyboardFocus() const
618{
619    return m_webPlugin->supportsKeyboardFocus();
620}
621
622bool WebPluginContainerImpl::supportsInputMethod() const
623{
624    return m_webPlugin->supportsInputMethod();
625}
626
627bool WebPluginContainerImpl::canProcessDrag() const
628{
629    return m_webPlugin->canProcessDrag();
630}
631
632bool WebPluginContainerImpl::wantsWheelEvents()
633{
634    return m_wantsWheelEvents;
635}
636
637void WebPluginContainerImpl::willDestroyPluginLoadObserver(WebPluginLoadObserver* observer)
638{
639    size_t pos = m_pluginLoadObservers.find(observer);
640    if (pos == kNotFound)
641        return;
642    m_pluginLoadObservers.remove(pos);
643}
644
645ScrollbarGroup* WebPluginContainerImpl::scrollbarGroup()
646{
647    if (!m_scrollbarGroup)
648        m_scrollbarGroup = adoptPtr(new ScrollbarGroup(m_element->document().frame()->view(), frameRect()));
649    return m_scrollbarGroup.get();
650}
651
652void WebPluginContainerImpl::willStartLiveResize()
653{
654    if (m_scrollbarGroup)
655        m_scrollbarGroup->willStartLiveResize();
656}
657
658void WebPluginContainerImpl::willEndLiveResize()
659{
660    if (m_scrollbarGroup)
661        m_scrollbarGroup->willEndLiveResize();
662}
663
664bool WebPluginContainerImpl::paintCustomOverhangArea(GraphicsContext* context, const IntRect& horizontalOverhangArea, const IntRect& verticalOverhangArea, const IntRect& dirtyRect)
665{
666    context->save();
667    context->setFillColor(Color(0xCC, 0xCC, 0xCC));
668    context->fillRect(intersection(horizontalOverhangArea, dirtyRect));
669    context->fillRect(intersection(verticalOverhangArea, dirtyRect));
670    context->restore();
671    return true;
672}
673
674// Private methods -------------------------------------------------------------
675
676WebPluginContainerImpl::WebPluginContainerImpl(HTMLPlugInElement* element, WebPlugin* webPlugin)
677#if ENABLE(OILPAN)
678    : m_frame(element->document().frame())
679#else
680    : FrameDestructionObserver(element->document().frame())
681#endif
682    , m_element(element)
683    , m_webPlugin(webPlugin)
684    , m_webLayer(0)
685    , m_touchEventRequestType(TouchEventRequestTypeNone)
686    , m_wantsWheelEvents(false)
687{
688}
689
690WebPluginContainerImpl::~WebPluginContainerImpl()
691{
692#if ENABLE(OILPAN)
693    // The element (and its document) are heap allocated and may
694    // have been finalized by now; unsafe to unregister the touch
695    // event handler at this stage.
696    //
697    // This is acceptable, as the widget will unregister itself if it
698    // is cleanly detached. If an explicit detach doesn't happen, this
699    // container is assumed to have died with the plugin element (and
700    // its document), hence no unregistration step is needed.
701    //
702    m_element = 0;
703#else
704    if (m_touchEventRequestType != TouchEventRequestTypeNone && m_element->document().frameHost())
705        m_element->document().frameHost()->eventHandlerRegistry().didRemoveEventHandler(*m_element, EventHandlerRegistry::TouchEvent);
706#endif
707
708    ScriptForbiddenScope::AllowSuperUnsafeScript thisShouldBeRemoved;
709
710    for (size_t i = 0; i < m_pluginLoadObservers.size(); ++i)
711        m_pluginLoadObservers[i]->clearPluginContainer();
712    m_webPlugin->destroy();
713    if (m_webLayer)
714        GraphicsLayer::unregisterContentsLayer(m_webLayer);
715}
716
717#if ENABLE(OILPAN)
718void WebPluginContainerImpl::detach()
719{
720    if (m_touchEventRequestType != TouchEventRequestTypeNone && m_element->document().frameHost())
721        m_element->document().frameHost()->eventHandlerRegistry().didRemoveEventHandler(*m_element, EventHandlerRegistry::TouchEvent);
722
723    setWebLayer(0);
724}
725#endif
726
727void WebPluginContainerImpl::handleMouseEvent(MouseEvent* event)
728{
729    ASSERT(parent()->isFrameView());
730
731    if (event->isDragEvent()) {
732        if (m_webPlugin->canProcessDrag())
733            handleDragEvent(event);
734        return;
735    }
736
737    // We cache the parent FrameView here as the plugin widget could be deleted
738    // in the call to HandleEvent. See http://b/issue?id=1362948
739    FrameView* parentView = toFrameView(parent());
740
741    WebMouseEventBuilder webEvent(this, m_element->renderer(), *event);
742    if (webEvent.type == WebInputEvent::Undefined)
743        return;
744
745    if (event->type() == EventTypeNames::mousedown)
746        focusPlugin();
747
748    if (m_scrollbarGroup) {
749        // This needs to be set before the other callbacks in this scope, since
750        // the scroll animator class might query the position in response.
751        m_scrollbarGroup->setLastMousePosition(IntPoint(event->x(), event->y()));
752        if (event->type() == EventTypeNames::mousemove)
753            m_scrollbarGroup->scrollAnimator()->mouseMovedInContentArea();
754        else if (event->type() == EventTypeNames::mouseover)
755            m_scrollbarGroup->scrollAnimator()->mouseEnteredContentArea();
756        else if (event->type() == EventTypeNames::mouseout)
757            m_scrollbarGroup->scrollAnimator()->mouseExitedContentArea();
758    }
759
760    WebCursorInfo cursorInfo;
761    if (m_webPlugin->handleInputEvent(webEvent, cursorInfo))
762        event->setDefaultHandled();
763
764    // A windowless plugin can change the cursor in response to a mouse move
765    // event.  We need to reflect the changed cursor in the frame view as the
766    // mouse is moved in the boundaries of the windowless plugin.
767    Page* page = parentView->frame().page();
768    if (!page)
769        return;
770    toChromeClientImpl(page->chrome().client()).setCursorForPlugin(cursorInfo);
771}
772
773void WebPluginContainerImpl::handleDragEvent(MouseEvent* event)
774{
775    ASSERT(event->isDragEvent());
776
777    WebDragStatus dragStatus = WebDragStatusUnknown;
778    if (event->type() == EventTypeNames::dragenter)
779        dragStatus = WebDragStatusEnter;
780    else if (event->type() == EventTypeNames::dragleave)
781        dragStatus = WebDragStatusLeave;
782    else if (event->type() == EventTypeNames::dragover)
783        dragStatus = WebDragStatusOver;
784    else if (event->type() == EventTypeNames::drop)
785        dragStatus = WebDragStatusDrop;
786
787    if (dragStatus == WebDragStatusUnknown)
788        return;
789
790    DataTransfer* dataTransfer = event->dataTransfer();
791    WebDragData dragData(dataTransfer->dataObject());
792    WebDragOperationsMask dragOperationMask = static_cast<WebDragOperationsMask>(dataTransfer->sourceOperation());
793    WebPoint dragScreenLocation(event->screenX(), event->screenY());
794    WebPoint dragLocation(event->absoluteLocation().x() - location().x(), event->absoluteLocation().y() - location().y());
795
796    m_webPlugin->handleDragStatusUpdate(dragStatus, dragData, dragOperationMask, dragLocation, dragScreenLocation);
797}
798
799void WebPluginContainerImpl::handleWheelEvent(WheelEvent* event)
800{
801    WebMouseWheelEventBuilder webEvent(this, m_element->renderer(), *event);
802    if (webEvent.type == WebInputEvent::Undefined)
803        return;
804
805    WebCursorInfo cursorInfo;
806    if (m_webPlugin->handleInputEvent(webEvent, cursorInfo))
807        event->setDefaultHandled();
808}
809
810void WebPluginContainerImpl::handleKeyboardEvent(KeyboardEvent* event)
811{
812    WebKeyboardEventBuilder webEvent(*event);
813    if (webEvent.type == WebInputEvent::Undefined)
814        return;
815
816    if (webEvent.type == WebInputEvent::KeyDown) {
817#if OS(MACOSX)
818        if (webEvent.modifiers == WebInputEvent::MetaKey
819#else
820        if (webEvent.modifiers == WebInputEvent::ControlKey
821#endif
822            && webEvent.windowsKeyCode == VKEY_C
823            // Only copy if there's a selection, so that we only ever do this
824            // for Pepper plugins that support copying.  Windowless NPAPI
825            // plugins will get the event as before.
826            && m_webPlugin->hasSelection()) {
827            copy();
828            event->setDefaultHandled();
829            return;
830        }
831    }
832
833    const WebInputEvent* currentInputEvent = WebViewImpl::currentInputEvent();
834
835    // Copy stashed info over, and only copy here in order not to interfere
836    // the ctrl-c logic above.
837    if (currentInputEvent
838        && WebInputEvent::isKeyboardEventType(currentInputEvent->type)) {
839        webEvent.modifiers |= currentInputEvent->modifiers &
840            (WebInputEvent::CapsLockOn | WebInputEvent::NumLockOn);
841    }
842
843    // Give the client a chance to issue edit comamnds.
844    WebViewImpl* view = WebViewImpl::fromPage(m_element->document().frame()->page());
845    if (m_webPlugin->supportsEditCommands() && view->client())
846        view->client()->handleCurrentKeyboardEvent();
847
848    WebCursorInfo cursorInfo;
849    if (m_webPlugin->handleInputEvent(webEvent, cursorInfo))
850        event->setDefaultHandled();
851}
852
853void WebPluginContainerImpl::handleTouchEvent(TouchEvent* event)
854{
855    switch (m_touchEventRequestType) {
856    case TouchEventRequestTypeNone:
857        return;
858    case TouchEventRequestTypeRaw: {
859        WebTouchEventBuilder webEvent(this, m_element->renderer(), *event);
860        if (webEvent.type == WebInputEvent::Undefined)
861            return;
862
863        if (event->type() == EventTypeNames::touchstart)
864            focusPlugin();
865
866        WebCursorInfo cursorInfo;
867        if (m_webPlugin->handleInputEvent(webEvent, cursorInfo))
868            event->setDefaultHandled();
869        // FIXME: Can a plugin change the cursor from a touch-event callback?
870        return;
871    }
872    case TouchEventRequestTypeSynthesizedMouse:
873        synthesizeMouseEventIfPossible(event);
874        return;
875    }
876}
877
878static inline bool gestureScrollHelper(ScrollbarGroup* scrollbarGroup, ScrollDirection positiveDirection, ScrollDirection negativeDirection, float delta)
879{
880    if (!delta)
881        return false;
882    float absDelta = delta > 0 ? delta : -delta;
883    return scrollbarGroup->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPrecisePixel, absDelta);
884}
885
886void WebPluginContainerImpl::handleGestureEvent(GestureEvent* event)
887{
888    WebGestureEventBuilder webEvent(this, m_element->renderer(), *event);
889    if (webEvent.type == WebInputEvent::Undefined)
890        return;
891    if (event->type() == EventTypeNames::gesturetapdown)
892        focusPlugin();
893    WebCursorInfo cursorInfo;
894    if (m_webPlugin->handleInputEvent(webEvent, cursorInfo)) {
895        event->setDefaultHandled();
896        return;
897    }
898
899    if (webEvent.type == WebInputEvent::GestureScrollUpdate || webEvent.type == WebInputEvent::GestureScrollUpdateWithoutPropagation) {
900        if (!m_scrollbarGroup)
901            return;
902        if (gestureScrollHelper(m_scrollbarGroup.get(), ScrollLeft, ScrollRight, webEvent.data.scrollUpdate.deltaX))
903            event->setDefaultHandled();
904        if (gestureScrollHelper(m_scrollbarGroup.get(), ScrollUp, ScrollDown, webEvent.data.scrollUpdate.deltaY))
905            event->setDefaultHandled();
906    }
907    // FIXME: Can a plugin change the cursor from a touch-event callback?
908}
909
910void WebPluginContainerImpl::synthesizeMouseEventIfPossible(TouchEvent* event)
911{
912    WebMouseEventBuilder webEvent(this, m_element->renderer(), *event);
913    if (webEvent.type == WebInputEvent::Undefined)
914        return;
915
916    WebCursorInfo cursorInfo;
917    if (m_webPlugin->handleInputEvent(webEvent, cursorInfo))
918        event->setDefaultHandled();
919}
920
921void WebPluginContainerImpl::focusPlugin()
922{
923    LocalFrame& containingFrame = toFrameView(parent())->frame();
924    if (Page* currentPage = containingFrame.page())
925        currentPage->focusController().setFocusedElement(m_element, &containingFrame);
926    else
927        containingFrame.document()->setFocusedElement(m_element);
928}
929
930void WebPluginContainerImpl::calculateGeometry(const IntRect& frameRect,
931                                               IntRect& windowRect,
932                                               IntRect& clipRect,
933                                               Vector<IntRect>& cutOutRects)
934{
935    windowRect = toScrollView(parent())->contentsToWindow(frameRect);
936
937    // Calculate a clip-rect so that we don't overlap the scrollbars, etc.
938    clipRect = windowClipRect();
939    clipRect.move(-windowRect.x(), -windowRect.y());
940
941    getPluginOcclusions(m_element, this->parent(), frameRect, cutOutRects);
942    // Convert to the plugin position.
943    for (size_t i = 0; i < cutOutRects.size(); i++)
944        cutOutRects[i].move(-frameRect.x(), -frameRect.y());
945}
946
947IntRect WebPluginContainerImpl::windowClipRect() const
948{
949    // Start by clipping to our bounds.
950    IntRect clipRect =
951        convertToContainingWindow(IntRect(0, 0, width(), height()));
952
953    // document().renderView() can be 0 when we receive messages from the
954    // plugins while we are destroying a frame.
955    // FIXME: Can we just check m_element->document().isActive() ?
956    if (m_element->renderer()->document().renderView()) {
957        // Take our element and get the clip rect from the enclosing layer and
958        // frame view.
959        clipRect.intersect(
960            m_element->document().view()->windowClipRectForFrameOwner(m_element));
961    }
962
963    return clipRect;
964}
965
966bool WebPluginContainerImpl::pluginShouldPersist() const
967{
968    return m_webPlugin->shouldPersist();
969}
970
971} // namespace blink
972