BrowserPlugin/WebView - Move plugin lifetime to DOM

Source/core/html/HTMLPlugInElement.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 13 matching lines @@
 #include "core/html/HTMLPlugInElement.h"
 
 #include "CSSPropertyNames.h"
 #include "HTMLNames.h"
 #include "bindings/v8/ScriptController.h"
 #include "bindings/v8/npruntime_impl.h"
 #include "core/dom/Document.h"
 #include "core/dom/Node.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/events/Event.h"
+#include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/html/HTMLContentElement.h"
 #include "core/html/HTMLImageLoader.h"
 #include "core/html/PluginDocument.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/page/EventHandler.h"
 #include "core/page/Page.h"
 #include "core/frame/Settings.h"
 #include "core/plugins/PluginView.h"
@@ skipping 65 matching lines @@
         m_imageLoader->elementDidMoveToNewDocument();
     HTMLFrameOwnerElement::didMoveToNewDocument(oldDocument);
 }
 
 void HTMLPlugInElement::attach(const AttachContext& context)
 {
     HTMLFrameOwnerElement::attach(context);
 
     if (!renderer() || useFallbackContent())
         return;
+
     if (isImageType()) {
         if (!m_imageLoader)
             m_imageLoader = adoptPtr(new HTMLImageLoader(this));
         m_imageLoader->updateFromElement();
     } else if (needsWidgetUpdate()
         && renderEmbeddedObject()
         && !renderEmbeddedObject()->showsUnavailablePluginIndicator()
         && !wouldLoadAsNetscapePlugin(m_url, m_serviceType)
         && !m_isDelayingLoadEvent) {
         m_isDelayingLoadEvent = true;
         document().incrementLoadEventDelayCount();
         document().loadPluginsSoon();
     }
 }
 
 void HTMLPlugInElement::updateWidget()
 {
     RefPtr<HTMLPlugInElement> protector(this);
     updateWidgetInternal();
     if (m_isDelayingLoadEvent) {
         m_isDelayingLoadEvent = false;
         document().decrementLoadEventDelayCount();
     }
 }
 
+void HTMLPlugInElement::requestPluginCreationWithoutRendererIfPossible()
+{
+    if (m_serviceType.isEmpty())
+        return;
+
+    if (!document().frame()->loader().client()->canCreatePluginWithoutRenderer(m_serviceType))
+        return;
+
+    if (renderer() && renderer()->isWidget())
+        return;
+
+    createPluginWithoutRenderer();
+}
+
+void HTMLPlugInElement::createPluginWithoutRenderer()
+{
+    ASSERT(document().frame()->loader().client()->canCreatePluginWithoutRenderer(m_serviceType));
+
+    KURL url;
+    Vector<String> paramNames;
+    Vector<String> paramValues;
+
+    paramNames.append("type");
+    paramValues.append(m_serviceType);
+
+    bool useFallback = false;
+    loadPlugin(url, m_serviceType, paramNames, paramValues, useFallback, false);
+}
+
 void HTMLPlugInElement::detach(const AttachContext& context)
 {
     // Update the widget the next time we attach (detaching destroys the plugin).
     // FIXME: None of this "needsWidgetUpdate" related code looks right.
     if (renderer() && !useFallbackContent())
         setNeedsWidgetUpdate(true);
     if (m_isDelayingLoadEvent) {
         m_isDelayingLoadEvent = false;
         document().decrementLoadEventDelayCount();
     }
 
+    // Only try to persist a plugin widget we actually own.
+    Widget* plugin = ownedWidget();
+    if (plugin && plugin->pluginShouldPersist())
+        m_persistedPluginWidget = plugin;
     resetInstance();
+    // FIXME - is this next line necessary?
+    setWidget(nullptr);
 
     if (m_isCapturingMouseEvents) {
         if (LocalFrame* frame = document().frame())
             frame->eventHandler().setCapturingMouseEventsNode(nullptr);
         m_isCapturingMouseEvents = false;
     }
 
     if (m_NPObject) {
         _NPN_ReleaseObject(m_NPObject);
         m_NPObject = 0;
@@ skipping 45 matching lines @@
 SharedPersistent<v8::Object>* HTMLPlugInElement::pluginWrapper()
 {
     LocalFrame* frame = document().frame();
     if (!frame)
         return 0;
 
     // If the host dynamically turns off JavaScript (or Java) we will still
     // return the cached allocated Bindings::Instance. Not supporting this
     // edge-case is OK.
     if (!m_pluginWrapper) {
-        if (Widget* widget = pluginWidget())
-            m_pluginWrapper = frame->script().createPluginWrapper(widget);
+        Widget* plugin;
+
+        if (m_persistedPluginWidget)
+            plugin = m_persistedPluginWidget.get();
+        else
+            plugin = pluginWidget();
+
+        if (plugin)
+            m_pluginWrapper = frame->script().createPluginWrapper(plugin);
     }
     return m_pluginWrapper.get();
 }
 
 Widget* HTMLPlugInElement::pluginWidget() const
 {
     if (RenderWidget* renderWidget = renderWidgetForJSBindings())
         return renderWidget->widget();
     return 0;
 }
@@ skipping 159 matching lines @@
     RenderEmbeddedObject* renderer = renderEmbeddedObject();
     ASSERT(renderer);
     if (!renderer)
         return false;
 
     KURL completedURL = document().completeURL(url);
     if (!pluginIsLoadable(completedURL, mimeType))
         return false;
 
     bool useFallback;
+    bool requireRenderer = true;
     if (shouldUsePlugin(completedURL, mimeType, renderer->hasFallbackContent(), useFallback))
-        return loadPlugin(completedURL, mimeType, paramNames, paramValues, useFallback);
+        return loadPlugin(completedURL, mimeType, paramNames, paramValues, useFallback, requireRenderer);
 
     // If the plug-in element already contains a subframe,
     // loadOrRedirectSubframe will re-use it. Otherwise, it will create a new
     // frame and set it as the RenderPart's widget, causing what was previously
     // in the widget to be torn down.
     return loadOrRedirectSubframe(completedURL, getNameAttribute(), true);
 }
 
-bool HTMLPlugInElement::loadPlugin(const KURL& url, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback)
+bool HTMLPlugInElement::loadPlugin(const KURL& url, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback, bool requireRenderer)
 {
     LocalFrame* frame = document().frame();
 
     if (!frame->loader().allowPlugins(AboutToInstantiatePlugin))
         return false;
 
     RenderEmbeddedObject* renderer = renderEmbeddedObject();
     // FIXME: This code should not depend on renderer!
-    if (!renderer || useFallback)
+    if ((!renderer && requireRenderer) || useFallback)
         return false;
 
     WTF_LOG(Plugins, "%p Plug-in URL: %s", this, m_url.utf8().data());
     WTF_LOG(Plugins, "   Loaded URL: %s", url.string().utf8().data());
     m_loadedUrl = url;
 
-    bool loadManually = document().isPluginDocument() && !document().containsPlugins() && toPluginDocument(document()).shouldLoadPluginManually();
-    RefPtr<Widget> widget = frame->loader().client()->createPlugin(this, url, paramNames, paramValues, mimeType, loadManually, FrameLoaderClient::FailOnDetachedPlugin);
+    RefPtr<Widget> widget = m_persistedPluginWidget;
+    if (!widget) {
+        bool loadManually = document().isPluginDocument() && !document().containsPlugins() && toPluginDocument(document()).shouldLoadPluginManually();
+        FrameLoaderClient::DetachedPluginPolicy policy = requireRenderer ? FrameLoaderClient::FailOnDetachedPlugin : FrameLoaderClient::AllowDetachedPlugin;
+        widget = frame->loader().client()->createPlugin(this, url, paramNames, paramValues, mimeType, loadManually, policy);
+    }
 
     if (!widget) {
-        if (!renderer->showsUnavailablePluginIndicator())
+        if (renderer && !renderer->showsUnavailablePluginIndicator())
             renderer->setPluginUnavailabilityReason(RenderEmbeddedObject::PluginMissing);
         return false;
     }
 
-    renderer->setWidget(widget);
+    if (renderer) {
+        setWidget(widget);
+        m_persistedPluginWidget = nullptr;
+    } else if (widget != m_persistedPluginWidget) {
+        m_persistedPluginWidget = widget;
+    }
     document().setContainsPlugins();
     scheduleLayerUpdate();
     return true;
 }
 
 bool HTMLPlugInElement::shouldUsePlugin(const KURL& url, const String& mimeType, bool hasFallback, bool& useFallback)
 {
     // Allow other plug-ins to win over QuickTime because if the user has
     // installed a plug-in that can handle TIFF (which QuickTime can also
     // handle) they probably intended to override QT.
@@ skipping 60 matching lines @@
     if (root.isOldestAuthorShadowRoot())
         lazyReattachIfAttached();
 }
 
 bool HTMLPlugInElement::useFallbackContent() const
 {
     return hasAuthorShadowRoot();
 }
 
 }