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/*
* Copyright (C) 2008-2017 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 "HTMLPlugInImageElement.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "CommonVM.h"
#include "ContentSecurityPolicy.h"
#include "EventNames.h"
#include "Frame.h"
#include "FrameLoaderClient.h"
#include "HTMLImageLoader.h"
#include "JSDOMConvertBoolean.h"
#include "JSDOMConvertInterface.h"
#include "JSDOMConvertStrings.h"
#include "JSShadowRoot.h"
#include "LocalizedStrings.h"
#include "Logging.h"
#include "MouseEvent.h"
#include "Page.h"
#include "PlatformMouseEvent.h"
#include "PlugInClient.h"
#include "PluginViewBase.h"
#include "RenderImage.h"
#include "RenderSnapshottedPlugIn.h"
#include "RenderTreeUpdater.h"
#include "SchemeRegistry.h"
#include "ScriptController.h"
#include "SecurityOrigin.h"
#include "Settings.h"
#include "ShadowRoot.h"
#include "StyleTreeResolver.h"
#include "SubframeLoader.h"
#include "TypedElementDescendantIterator.h"
#include "UserGestureIndicator.h"
#include <JavaScriptCore/CatchScope.h>
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLPlugInImageElement);
static const int sizingTinyDimensionThreshold = 40;
static const float sizingFullPageAreaRatioThreshold = 0.96;
static const Seconds autostartSoonAfterUserGestureThreshold = 5_s;
// This delay should not exceed the snapshot delay in PluginView.cpp
static const Seconds simulatedMouseClickTimerDelay { 750_ms };
#if PLATFORM(COCOA)
static const Seconds removeSnapshotTimerDelay { 1500_ms };
#endif
static const String titleText(Page& page, const String& mimeType)
{
if (mimeType.isEmpty())
return snapshottedPlugInLabelTitle();
// FIXME: It's not consistent to get a string from the page's chrome client, but then cache it globally.
// If it's global, it should come from elsewhere. If it's per-page then it should be cached per page.
static NeverDestroyed<HashMap<String, String>> mimeTypeToLabelTitleMap;
return mimeTypeToLabelTitleMap.get().ensure(mimeType, [&] {
auto title = page.chrome().client().plugInStartLabelTitle(mimeType);
if (!title.isEmpty())
return title;
return snapshottedPlugInLabelTitle();
}).iterator->value;
};
static const String subtitleText(Page& page, const String& mimeType)
{
if (mimeType.isEmpty())
return snapshottedPlugInLabelSubtitle();
// FIXME: It's not consistent to get a string from the page's chrome client, but then cache it globally.
// If it's global, it should come from elsewhere. If it's per-page then it should be cached per page.
static NeverDestroyed<HashMap<String, String>> mimeTypeToLabelSubtitleMap;
return mimeTypeToLabelSubtitleMap.get().ensure(mimeType, [&] {
auto subtitle = page.chrome().client().plugInStartLabelSubtitle(mimeType);
if (!subtitle.isEmpty())
return subtitle;
return snapshottedPlugInLabelSubtitle();
}).iterator->value;
};
HTMLPlugInImageElement::HTMLPlugInImageElement(const QualifiedName& tagName, Document& document)
: HTMLPlugInElement(tagName, document)
, m_simulatedMouseClickTimer(*this, &HTMLPlugInImageElement::simulatedMouseClickTimerFired, simulatedMouseClickTimerDelay)
, m_removeSnapshotTimer(*this, &HTMLPlugInImageElement::removeSnapshotTimerFired)
, m_createdDuringUserGesture(UserGestureIndicator::processingUserGesture())
{
setHasCustomStyleResolveCallbacks();
}
void HTMLPlugInImageElement::finishCreating()
{
scheduleUpdateForAfterStyleResolution();
}
HTMLPlugInImageElement::~HTMLPlugInImageElement()
{
if (m_needsDocumentActivationCallbacks)
document().unregisterForDocumentSuspensionCallbacks(*this);
}
void HTMLPlugInImageElement::setDisplayState(DisplayState state)
{
#if PLATFORM(COCOA)
if (state == RestartingWithPendingMouseClick || state == Restarting) {
m_isRestartedPlugin = true;
m_snapshotDecision = NeverSnapshot;
invalidateStyleAndLayerComposition();
if (displayState() == DisplayingSnapshot)
m_removeSnapshotTimer.startOneShot(removeSnapshotTimerDelay);
}
#endif
HTMLPlugInElement::setDisplayState(state);
}
RenderEmbeddedObject* HTMLPlugInImageElement::renderEmbeddedObject() const
{
// HTMLObjectElement and HTMLEmbedElement may return arbitrary renderers when using fallback content.
return is<RenderEmbeddedObject>(renderer()) ? downcast<RenderEmbeddedObject>(renderer()) : nullptr;
}
bool HTMLPlugInImageElement::isImageType()
{
if (m_serviceType.isEmpty() && protocolIs(m_url, "data"))
m_serviceType = mimeTypeFromDataURL(m_url);
if (auto frame = makeRefPtr(document().frame()))
return frame->loader().client().objectContentType(document().completeURL(m_url), m_serviceType) == ObjectContentType::Image;
return Image::supportsType(m_serviceType);
}
// We don't use m_url, as it may not be the final URL that the object loads, depending on <param> values.
bool HTMLPlugInImageElement::allowedToLoadFrameURL(const String& url)
{
URL completeURL = document().completeURL(url);
if (contentFrame() && WTF::protocolIsJavaScript(completeURL) && !document().securityOrigin().canAccess(contentDocument()->securityOrigin()))
return false;
return document().frame()->isURLAllowed(completeURL);
}
// We don't use m_url, or m_serviceType as they may not be the final values
// that <object> uses depending on <param> values.
bool HTMLPlugInImageElement::wouldLoadAsPlugIn(const String& url, const String& serviceType)
{
ASSERT(document().frame());
URL completedURL;
if (!url.isEmpty())
completedURL = document().completeURL(url);
return document().frame()->loader().client().objectContentType(completedURL, serviceType) == ObjectContentType::PlugIn;
}
RenderPtr<RenderElement> HTMLPlugInImageElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition& insertionPosition)
{
ASSERT(document().pageCacheState() == Document::NotInPageCache);
if (displayState() >= PreparingPluginReplacement)
return HTMLPlugInElement::createElementRenderer(WTFMove(style), insertionPosition);
// Once a plug-in element creates its renderer, it needs to be told when the document goes
// inactive or reactivates so it can clear the renderer before going into the page cache.
if (!m_needsDocumentActivationCallbacks) {
m_needsDocumentActivationCallbacks = true;
document().registerForDocumentSuspensionCallbacks(*this);
}
if (displayState() == DisplayingSnapshot) {
auto renderSnapshottedPlugIn = createRenderer<RenderSnapshottedPlugIn>(*this, WTFMove(style));
renderSnapshottedPlugIn->updateSnapshot(m_snapshotImage.get());
return renderSnapshottedPlugIn;
}
if (useFallbackContent())
return RenderElement::createFor(*this, WTFMove(style));
if (isImageType())
return createRenderer<RenderImage>(*this, WTFMove(style));
return HTMLPlugInElement::createElementRenderer(WTFMove(style), insertionPosition);
}
bool HTMLPlugInImageElement::childShouldCreateRenderer(const Node& child) const
{
if (is<RenderSnapshottedPlugIn>(renderer()) && !hasShadowRootParent(child))
return false;
return HTMLPlugInElement::childShouldCreateRenderer(child);
}
void HTMLPlugInImageElement::willRecalcStyle(Style::Change change)
{
// Make sure style recalcs scheduled by a child shadow tree don't trigger reconstruction and cause flicker.
if (change == Style::NoChange && styleValidity() == Style::Validity::Valid)
return;
// FIXME: There shoudn't be need to force render tree reconstruction here.
// It is only done because loading and load event dispatching is tied to render tree construction.
if (!useFallbackContent() && needsWidgetUpdate() && renderer() && !isImageType() && displayState() != DisplayingSnapshot)
invalidateStyleAndRenderersForSubtree();
}
void HTMLPlugInImageElement::didRecalcStyle(Style::Change styleChange)
{
scheduleUpdateForAfterStyleResolution();
HTMLPlugInElement::didRecalcStyle(styleChange);
}
void HTMLPlugInImageElement::didAttachRenderers()
{
m_needsWidgetUpdate = true;
scheduleUpdateForAfterStyleResolution();
// Update the RenderImageResource of the associated RenderImage.
if (m_imageLoader && is<RenderImage>(renderer())) {
auto& renderImageResource = downcast<RenderImage>(*renderer()).imageResource();
if (!renderImageResource.cachedImage())
renderImageResource.setCachedImage(m_imageLoader->image());
}
HTMLPlugInElement::didAttachRenderers();
}
void HTMLPlugInImageElement::willDetachRenderers()
{
auto widget = makeRefPtr(pluginWidget(PluginLoadingPolicy::DoNotLoad));
if (is<PluginViewBase>(widget))
downcast<PluginViewBase>(*widget).willDetachRenderer();
HTMLPlugInElement::willDetachRenderers();
}
void HTMLPlugInImageElement::scheduleUpdateForAfterStyleResolution()
{
if (m_hasUpdateScheduledForAfterStyleResolution)
return;
document().incrementLoadEventDelayCount();
m_hasUpdateScheduledForAfterStyleResolution = true;
Style::queuePostResolutionCallback([protectedThis = makeRef(*this)] {
protectedThis->updateAfterStyleResolution();
});
}
void HTMLPlugInImageElement::updateAfterStyleResolution()
{
m_hasUpdateScheduledForAfterStyleResolution = false;
// Do this after style resolution, since the image or widget load might complete synchronously
// and cause us to re-enter otherwise. Also, we can't really answer the question "do I have a renderer"
// accurately until after style resolution.
if (renderer() && !useFallbackContent()) {
if (isImageType()) {
if (!m_imageLoader)
m_imageLoader = std::make_unique<HTMLImageLoader>(*this);
if (m_needsImageReload)
m_imageLoader->updateFromElementIgnoringPreviousError();
else
m_imageLoader->updateFromElement();
} else {
if (needsWidgetUpdate() && renderEmbeddedObject() && !renderEmbeddedObject()->isPluginUnavailable())
updateWidget(CreatePlugins::No);
}
}
// Either we reloaded the image just now, or we had some reason not to.
// Either way, clear the flag now, since we don't need to remember to try again.
m_needsImageReload = false;
document().decrementLoadEventDelayCount();
}
void HTMLPlugInImageElement::didMoveToNewDocument(Document& oldDocument, Document& newDocument)
{
ASSERT_WITH_SECURITY_IMPLICATION(&document() == &newDocument);
if (m_needsDocumentActivationCallbacks) {
oldDocument.unregisterForDocumentSuspensionCallbacks(*this);
newDocument.registerForDocumentSuspensionCallbacks(*this);
}
if (m_imageLoader)
m_imageLoader->elementDidMoveToNewDocument();
if (m_hasUpdateScheduledForAfterStyleResolution) {
oldDocument.decrementLoadEventDelayCount();
newDocument.incrementLoadEventDelayCount();
}
HTMLPlugInElement::didMoveToNewDocument(oldDocument, newDocument);
}
void HTMLPlugInImageElement::prepareForDocumentSuspension()
{
if (renderer())
RenderTreeUpdater::tearDownRenderers(*this);
HTMLPlugInElement::prepareForDocumentSuspension();
}
void HTMLPlugInImageElement::resumeFromDocumentSuspension()
{
scheduleUpdateForAfterStyleResolution();
invalidateStyleAndRenderersForSubtree();
HTMLPlugInElement::resumeFromDocumentSuspension();
}
void HTMLPlugInImageElement::updateSnapshot(Image* image)
{
if (displayState() > DisplayingSnapshot)
return;
m_snapshotImage = image;
auto* renderer = this->renderer();
if (!renderer)
return;
if (is<RenderSnapshottedPlugIn>(*renderer)) {
downcast<RenderSnapshottedPlugIn>(*renderer).updateSnapshot(image);
return;
}
if (is<RenderEmbeddedObject>(*renderer))
renderer->repaint();
}
static DOMWrapperWorld& plugInImageElementIsolatedWorld()
{
static auto& isolatedWorld = DOMWrapperWorld::create(commonVM()).leakRef();
return isolatedWorld;
}
void HTMLPlugInImageElement::didAddUserAgentShadowRoot(ShadowRoot& root)
{
HTMLPlugInElement::didAddUserAgentShadowRoot(root);
if (displayState() >= PreparingPluginReplacement)
return;
auto* page = document().page();
if (!page)
return;
// Reset any author styles that may apply as we only want explicit
// styles defined in the injected user agents stylesheets to specify
// the look-and-feel of the snapshotted plug-in overlay.
root.setResetStyleInheritance(true);
String mimeType = serviceType();
auto& isolatedWorld = plugInImageElementIsolatedWorld();
document().ensurePlugInsInjectedScript(isolatedWorld);
auto& scriptController = document().frame()->script();
auto& globalObject = *JSC::jsCast<JSDOMGlobalObject*>(scriptController.globalObject(isolatedWorld));
auto& vm = globalObject.vm();
JSC::JSLockHolder lock(vm);
auto scope = DECLARE_CATCH_SCOPE(vm);
auto& state = *globalObject.globalExec();
JSC::MarkedArgumentBuffer argList;
argList.append(toJS<IDLInterface<ShadowRoot>>(state, globalObject, root));
argList.append(toJS<IDLDOMString>(state, titleText(*page, mimeType)));
argList.append(toJS<IDLDOMString>(state, subtitleText(*page, mimeType)));
// This parameter determines whether or not the snapshot overlay should always be visible over the plugin snapshot.
// If no snapshot was found then we want the overlay to be visible.
argList.append(toJS<IDLBoolean>(!m_snapshotImage));
ASSERT(!argList.hasOverflowed());
// It is expected the JS file provides a createOverlay(shadowRoot, title, subtitle) function.
auto* overlay = globalObject.get(&state, JSC::Identifier::fromString(&state, "createOverlay")).toObject(&state);
ASSERT(!overlay == !!scope.exception());
if (!overlay) {
scope.clearException();
return;
}
JSC::CallData callData;
auto callType = overlay->methodTable(vm)->getCallData(overlay, callData);
if (callType == JSC::CallType::None)
return;
call(&state, overlay, callType, callData, &globalObject, argList);
scope.clearException();
}
bool HTMLPlugInImageElement::partOfSnapshotOverlay(const EventTarget* target) const
{
static NeverDestroyed<AtomString> selector(".snapshot-overlay", AtomString::ConstructFromLiteral);
auto shadow = userAgentShadowRoot();
if (!shadow)
return false;
if (!is<Node>(target))
return false;
auto queryResult = shadow->querySelector(selector.get());
if (queryResult.hasException())
return false;
auto snapshotLabel = makeRefPtr(queryResult.releaseReturnValue());
return snapshotLabel && snapshotLabel->contains(downcast<Node>(target));
}
void HTMLPlugInImageElement::removeSnapshotTimerFired()
{
m_snapshotImage = nullptr;
m_isRestartedPlugin = false;
invalidateStyleAndLayerComposition();
if (renderer())
renderer()->repaint();
}
void HTMLPlugInImageElement::restartSimilarPlugIns()
{
// Restart any other snapshotted plugins in the page with the same origin. Note that they
// may be in different frames, so traverse from the top of the document.
auto plugInOrigin = m_loadedUrl.host();
String mimeType = serviceType();
Vector<Ref<HTMLPlugInImageElement>> similarPlugins;
if (!document().page())
return;
for (RefPtr<Frame> frame = &document().page()->mainFrame(); frame; frame = frame->tree().traverseNext()) {
if (!frame->loader().subframeLoader().containsPlugins())
continue;
if (!frame->document())
continue;
for (auto& element : descendantsOfType<HTMLPlugInImageElement>(*frame->document())) {
if (plugInOrigin == element.loadedUrl().host() && mimeType == element.serviceType())
similarPlugins.append(element);
}
}
for (auto& plugInToRestart : similarPlugins) {
if (plugInToRestart->displayState() <= HTMLPlugInElement::DisplayingSnapshot) {
LOG(Plugins, "%p Plug-in looks similar to a restarted plug-in. Restart.", plugInToRestart.ptr());
plugInToRestart->restartSnapshottedPlugIn();
}
plugInToRestart->m_snapshotDecision = NeverSnapshot;
}
}
void HTMLPlugInImageElement::userDidClickSnapshot(MouseEvent& event, bool forwardEvent)
{
if (forwardEvent)
m_pendingClickEventFromSnapshot = &event;
auto plugInOrigin = m_loadedUrl.host();
if (document().page() && !SchemeRegistry::shouldTreatURLSchemeAsLocal(document().page()->mainFrame().document()->baseURL().protocol().toStringWithoutCopying()) && document().page()->settings().autostartOriginPlugInSnapshottingEnabled())
document().page()->plugInClient()->didStartFromOrigin(document().page()->mainFrame().document()->baseURL().host().toString(), plugInOrigin.toString(), serviceType(), document().page()->sessionID());
LOG(Plugins, "%p User clicked on snapshotted plug-in. Restart.", this);
restartSnapshottedPlugIn();
if (forwardEvent)
setDisplayState(RestartingWithPendingMouseClick);
restartSimilarPlugIns();
}
void HTMLPlugInImageElement::setIsPrimarySnapshottedPlugIn(bool isPrimarySnapshottedPlugIn)
{
if (!document().page() || !document().page()->settings().primaryPlugInSnapshotDetectionEnabled() || document().page()->settings().snapshotAllPlugIns())
return;
if (isPrimarySnapshottedPlugIn) {
if (m_plugInWasCreated) {
LOG(Plugins, "%p Plug-in was detected as the primary element in the page. Restart.", this);
restartSnapshottedPlugIn();
restartSimilarPlugIns();
} else {
LOG(Plugins, "%p Plug-in was detected as the primary element in the page, but is not yet created. Will restart later.", this);
m_deferredPromotionToPrimaryPlugIn = true;
}
}
}
void HTMLPlugInImageElement::restartSnapshottedPlugIn()
{
if (displayState() >= RestartingWithPendingMouseClick)
return;
setDisplayState(Restarting);
invalidateStyleAndRenderersForSubtree();
}
void HTMLPlugInImageElement::dispatchPendingMouseClick()
{
ASSERT(!m_simulatedMouseClickTimer.isActive());
m_simulatedMouseClickTimer.restart();
}
void HTMLPlugInImageElement::simulatedMouseClickTimerFired()
{
ASSERT(displayState() == RestartingWithPendingMouseClick);
ASSERT(m_pendingClickEventFromSnapshot);
setDisplayState(Playing);
dispatchSimulatedClick(m_pendingClickEventFromSnapshot.get(), SendMouseOverUpDownEvents, DoNotShowPressedLook);
m_pendingClickEventFromSnapshot = nullptr;
}
static bool documentHadRecentUserGesture(Document& document)
{
MonotonicTime lastKnownUserGestureTimestamp = document.lastHandledUserGestureTimestamp();
if (document.frame() != &document.page()->mainFrame() && document.page()->mainFrame().document())
lastKnownUserGestureTimestamp = std::max(lastKnownUserGestureTimestamp, document.page()->mainFrame().document()->lastHandledUserGestureTimestamp());
return MonotonicTime::now() - lastKnownUserGestureTimestamp < autostartSoonAfterUserGestureThreshold;
}
void HTMLPlugInImageElement::checkSizeChangeForSnapshotting()
{
if (!m_needsCheckForSizeChange || m_snapshotDecision != MaySnapshotWhenResized || documentHadRecentUserGesture(document()))
return;
m_needsCheckForSizeChange = false;
auto contentBoxRect = downcast<RenderBox>(*renderer()).contentBoxRect();
int contentWidth = contentBoxRect.width();
int contentHeight = contentBoxRect.height();
if (contentWidth <= sizingTinyDimensionThreshold || contentHeight <= sizingTinyDimensionThreshold)
return;
LOG(Plugins, "%p Plug-in originally avoided snapshotting because it was sized %dx%d. Now it is %dx%d. Tell it to snapshot.\n", this, m_sizeWhenSnapshotted.width(), m_sizeWhenSnapshotted.height(), contentWidth, contentHeight);
setDisplayState(WaitingForSnapshot);
m_snapshotDecision = Snapshotted;
auto widget = makeRefPtr(pluginWidget());
if (is<PluginViewBase>(widget))
downcast<PluginViewBase>(*widget).beginSnapshottingRunningPlugin();
}
static inline bool is100Percent(Length length)
{
return length.isPercent() && length.percent() == 100;
}
static inline bool isSmallerThanTinySizingThreshold(const RenderEmbeddedObject& renderer)
{
auto contentRect = renderer.contentBoxRect();
return contentRect.width() <= sizingTinyDimensionThreshold || contentRect.height() <= sizingTinyDimensionThreshold;
}
bool HTMLPlugInImageElement::isTopLevelFullPagePlugin(const RenderEmbeddedObject& renderer) const
{
ASSERT(document().frame());
auto& frame = *document().frame();
if (!frame.isMainFrame())
return false;
auto& style = renderer.style();
auto visibleSize = frame.view()->visibleSize();
auto contentRect = renderer.contentBoxRect();
float contentWidth = contentRect.width();
float contentHeight = contentRect.height();
return is100Percent(style.width()) && is100Percent(style.height()) && contentWidth * contentHeight > visibleSize.area().unsafeGet() * sizingFullPageAreaRatioThreshold;
}
void HTMLPlugInImageElement::checkSnapshotStatus()
{
if (!is<RenderSnapshottedPlugIn>(*renderer())) {
if (displayState() == Playing)
checkSizeChangeForSnapshotting();
return;
}
// If width and height styles were previously not set and we've snapshotted the plugin we may need to restart the plugin so that its state can be updated appropriately.
if (!document().page()->settings().snapshotAllPlugIns() && displayState() <= DisplayingSnapshot && !m_plugInDimensionsSpecified) {
auto& renderer = downcast<RenderSnapshottedPlugIn>(*this->renderer());
if (!renderer.style().logicalWidth().isSpecified() && !renderer.style().logicalHeight().isSpecified())
return;
m_plugInDimensionsSpecified = true;
if (isTopLevelFullPagePlugin(renderer)) {
m_snapshotDecision = NeverSnapshot;
restartSnapshottedPlugIn();
} else if (isSmallerThanTinySizingThreshold(renderer)) {
m_snapshotDecision = MaySnapshotWhenResized;
restartSnapshottedPlugIn();
}
return;
}
// Notify the shadow root that the size changed so that we may update the overlay layout.
ensureUserAgentShadowRoot().dispatchEvent(Event::create(eventNames().resizeEvent, Event::CanBubble::Yes, Event::IsCancelable::No));
}
void HTMLPlugInImageElement::subframeLoaderWillCreatePlugIn(const URL& url)
{
LOG(Plugins, "%p Plug-in URL: %s", this, m_url.utf8().data());
LOG(Plugins, " Actual URL: %s", url.string().utf8().data());
LOG(Plugins, " MIME type: %s", serviceType().utf8().data());
m_loadedUrl = url;
m_plugInWasCreated = false;
m_deferredPromotionToPrimaryPlugIn = false;
if (!document().page() || !document().page()->settings().plugInSnapshottingEnabled()) {
m_snapshotDecision = NeverSnapshot;
return;
}
if (displayState() == Restarting) {
LOG(Plugins, "%p Plug-in is explicitly restarting", this);
m_snapshotDecision = NeverSnapshot;
setDisplayState(Playing);
return;
}
if (displayState() == RestartingWithPendingMouseClick) {
LOG(Plugins, "%p Plug-in is explicitly restarting but also waiting for a click", this);
m_snapshotDecision = NeverSnapshot;
return;
}
if (m_snapshotDecision == NeverSnapshot) {
LOG(Plugins, "%p Plug-in is blessed, allow it to start", this);
return;
}
bool inMainFrame = document().frame()->isMainFrame();
if (document().isPluginDocument() && inMainFrame) {
LOG(Plugins, "%p Plug-in document in main frame", this);
m_snapshotDecision = NeverSnapshot;
return;
}
if (UserGestureIndicator::processingUserGesture()) {
LOG(Plugins, "%p Script is currently processing user gesture, set to play", this);
m_snapshotDecision = NeverSnapshot;
return;
}
if (m_createdDuringUserGesture) {
LOG(Plugins, "%p Plug-in was created when processing user gesture, set to play", this);
m_snapshotDecision = NeverSnapshot;
return;
}
if (documentHadRecentUserGesture(document())) {
LOG(Plugins, "%p Plug-in was created shortly after a user gesture, set to play", this);
m_snapshotDecision = NeverSnapshot;
return;
}
if (document().page()->settings().snapshotAllPlugIns()) {
LOG(Plugins, "%p Plug-in forced to snapshot by user preference", this);
m_snapshotDecision = Snapshotted;
setDisplayState(WaitingForSnapshot);
return;
}
if (document().page()->settings().autostartOriginPlugInSnapshottingEnabled() && document().page()->plugInClient() && document().page()->plugInClient()->shouldAutoStartFromOrigin(document().page()->mainFrame().document()->baseURL().host().toString(), url.host().toString(), serviceType())) {
LOG(Plugins, "%p Plug-in from (%s, %s) is marked to auto-start, set to play", this, document().page()->mainFrame().document()->baseURL().host().utf8().data(), url.host().utf8().data());
m_snapshotDecision = NeverSnapshot;
return;
}
if (m_loadedUrl.isEmpty() && !serviceType().isEmpty()) {
LOG(Plugins, "%p Plug-in has no src URL but does have a valid mime type %s, set to play", this, serviceType().utf8().data());
m_snapshotDecision = MaySnapshotWhenContentIsSet;
return;
}
if (!SchemeRegistry::shouldTreatURLSchemeAsLocal(m_loadedUrl.protocol().toStringWithoutCopying()) && !m_loadedUrl.host().isEmpty() && m_loadedUrl.host() == document().page()->mainFrame().document()->baseURL().host()) {
LOG(Plugins, "%p Plug-in is served from page's domain, set to play", this);
m_snapshotDecision = NeverSnapshot;
return;
}
auto& renderer = downcast<RenderEmbeddedObject>(*this->renderer());
auto contentRect = renderer.contentBoxRect();
int contentWidth = contentRect.width();
int contentHeight = contentRect.height();
m_plugInDimensionsSpecified = renderer.style().logicalWidth().isSpecified() || renderer.style().logicalHeight().isSpecified();
if (isTopLevelFullPagePlugin(renderer)) {
LOG(Plugins, "%p Plug-in is top level full page, set to play", this);
m_snapshotDecision = NeverSnapshot;
return;
}
if (isSmallerThanTinySizingThreshold(renderer)) {
LOG(Plugins, "%p Plug-in is very small %dx%d, set to play", this, contentWidth, contentHeight);
m_sizeWhenSnapshotted = IntSize(contentWidth, contentHeight);
m_snapshotDecision = MaySnapshotWhenResized;
return;
}
if (!document().page()->plugInClient()) {
LOG(Plugins, "%p There is no plug-in client. Set to wait for snapshot", this);
m_snapshotDecision = NeverSnapshot;
setDisplayState(WaitingForSnapshot);
return;
}
LOG(Plugins, "%p Plug-in from (%s, %s) is not auto-start, sized at %dx%d, set to wait for snapshot", this, document().topDocument().baseURL().host().utf8().data(), url.host().utf8().data(), contentWidth, contentHeight);
m_snapshotDecision = Snapshotted;
setDisplayState(WaitingForSnapshot);
}
void HTMLPlugInImageElement::subframeLoaderDidCreatePlugIn(const Widget& widget)
{
m_plugInWasCreated = true;
if (is<PluginViewBase>(widget) && downcast<PluginViewBase>(widget).shouldAlwaysAutoStart()) {
LOG(Plugins, "%p Plug-in should auto-start, set to play", this);
m_snapshotDecision = NeverSnapshot;
setDisplayState(Playing);
return;
}
if (m_deferredPromotionToPrimaryPlugIn) {
LOG(Plugins, "%p Plug-in was created, previously deferred promotion to primary. Will promote", this);
setIsPrimarySnapshottedPlugIn(true);
m_deferredPromotionToPrimaryPlugIn = false;
}
}
void HTMLPlugInImageElement::defaultEventHandler(Event& event)
{
if (is<RenderEmbeddedObject>(renderer()) && displayState() == WaitingForSnapshot && is<MouseEvent>(event) && event.type() == eventNames().clickEvent) {
auto& mouseEvent = downcast<MouseEvent>(event);
if (mouseEvent.button() == LeftButton) {
userDidClickSnapshot(mouseEvent, true);
mouseEvent.setDefaultHandled();
return;
}
}
HTMLPlugInElement::defaultEventHandler(event);
}
bool HTMLPlugInImageElement::allowedToLoadPluginContent(const String& url, const String& mimeType) const
{
// Elements in user agent show tree should load whatever the embedding document policy is.
if (isInUserAgentShadowTree())
return true;
URL completedURL;
if (!url.isEmpty())
completedURL = document().completeURL(url);
ASSERT(document().contentSecurityPolicy());
const ContentSecurityPolicy& contentSecurityPolicy = *document().contentSecurityPolicy();
contentSecurityPolicy.upgradeInsecureRequestIfNeeded(completedURL, ContentSecurityPolicy::InsecureRequestType::Load);
if (!contentSecurityPolicy.allowObjectFromSource(completedURL))
return false;
auto& declaredMimeType = document().isPluginDocument() && document().ownerElement() ?
document().ownerElement()->attributeWithoutSynchronization(HTMLNames::typeAttr) : attributeWithoutSynchronization(HTMLNames::typeAttr);
return contentSecurityPolicy.allowPluginType(mimeType, declaredMimeType, completedURL);
}
bool HTMLPlugInImageElement::requestObject(const String& url, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues)
{
ASSERT(document().frame());
if (url.isEmpty() && mimeType.isEmpty())
return false;
if (!allowedToLoadPluginContent(url, mimeType)) {
renderEmbeddedObject()->setPluginUnavailabilityReason(RenderEmbeddedObject::PluginBlockedByContentSecurityPolicy);
return false;
}
if (HTMLPlugInElement::requestObject(url, mimeType, paramNames, paramValues))
return true;
return document().frame()->loader().subframeLoader().requestObject(*this, url, getNameAttribute(), mimeType, paramNames, paramValues);
}
void HTMLPlugInImageElement::updateImageLoaderWithNewURLSoon()
{
if (m_needsImageReload)
return;
m_needsImageReload = true;
scheduleUpdateForAfterStyleResolution();
invalidateStyle();
}
} // namespace WebCore