Implemented Browser Plugin (NOT FOR REVIEW)

content/renderer/guest_to_host_channel.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/renderer/guest_to_host_channel.h"
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/process_util.h"
+#include "base/string_number_conversions.h"
+#include "content/common/child_process.h"
+#include "content/common/view_messages.h"
+#include "content/renderer/gpu/webgraphicscontext3d_guest.h"
+#include "content/renderer/guest_render_view_observer.h"
+#include "content/renderer/render_thread_impl.h"
+#include "gpu/command_buffer/common/buffer.h"
+#include "gpu/command_buffer/common/command_buffer.h"
+#include "ipc/ipc_logging.h"
+#include "ppapi/c/pp_instance.h"
+#include "ppapi/c/pp_bool.h"
+#include "ppapi/c/pp_graphics_3d.h"
+#include "ppapi/cpp/graphics_3d.h"
+#include "ppapi/proxy/ppapi_command_buffer_proxy.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/proxy/serialized_var.h"
+#include "ppapi/shared_impl/api_id.h"
+#include "ppapi/shared_impl/host_resource.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebSize.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebWidget.h"
+#include "webkit/plugins/ppapi/event_conversion.h"
+
+base::MessageLoopProxy*
+    GuestToHostChannel::ProxyChannelDelegateImpl::GetIPCMessageLoop() {
+  DCHECK(ChildProcess::current()) << "Must be in the renderer.";
+  return ChildProcess::current()->io_message_loop_proxy();
+}
+
+base::WaitableEvent*
+    GuestToHostChannel::ProxyChannelDelegateImpl::GetShutdownEvent() {
+  DCHECK(ChildProcess::current()) << "Must be in the renderer.";
+  return ChildProcess::current()->GetShutDownEvent();
+}
+
+GuestToHostChannel::GuestToHostChannel(GuestRenderViewObserver* guest,
+                                       WebKit::WebView* webview):
+  ProxyChannel(base::GetCurrentProcessHandle()),
+  webview_(webview),
+  guest_(guest),
+  instance_(0),
+  width_(0),
+  height_(0) {
+}
+
+bool GuestToHostChannel::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  bool msg_is_ok = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(GuestToHostChannel, message, msg_is_ok)
+    IPC_MESSAGE_HANDLER(PpapiMsg_SupportsInterface, OnMsgSupportsInterface)
+    IPC_MESSAGE_HANDLER(PpapiMsg_SetPreferences, OnMsgSetPreferences)
+    IPC_MESSAGE_HANDLER(PpapiMsg_ReserveInstanceId, OnMsgReserveInstanceId)
+    // Message handlers from ppp_instance_proxy
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPPInstance_DidCreate,
+                        OnPluginMsgDidCreate)
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPPInstance_DidDestroy,
+                        OnPluginMsgDidDestroy)
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPPInstance_DidChangeView,
+                        OnPluginMsgDidChangeView)
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPPInstance_DidChangeFocus,
+                        OnPluginMsgDidChangeFocus)
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPPInstance_HandleDocumentLoad,
+                        OnPluginMsgHandleDocumentLoad)
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPPInstancePrivate_GetInstanceObject,
+                        OnMsgGetInstanceObject)
+    // Message handlers from ppp_messaging_proxy
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPPMessaging_HandleMessage,
+                        OnMsgHandleMessage)
+    // Message handlers from ppp_input_event_proxy
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPPInputEvent_HandleInputEvent,
+                        OnMsgHandleInputEvent)
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPPInputEvent_HandleFilteredInputEvent,
+                        OnMsgHandleFilteredInputEvent)
+    // Message handlers from ppb_graphics_3d_proxy
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPBGraphics3D_SwapBuffersACK,
+                        OnMsgSwapBuffersACK)
+    // Message handlers from ppp_graphics3d_proxy
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPPGraphics3D_ContextLost,
+                        OnMsgContextLost)
+    // Have the super handle all other messages.
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+
+  if (!msg_is_ok) {
+    // The message had a handler, but its deserialization failed.
+    // Kill the renderer to avoid potential spoofing attacks.
+    CHECK(false) << "Unable to deserialize message in ProxyChannel.";
+  }
+  return handled;
+}
+
+bool GuestToHostChannel::Send(IPC::Message* message) {
+  return ProxyChannel::Send(message);
+}
+
+void GuestToHostChannel::OnChannelError() {
+  // Our host has either crashed or is telling us (rudely) to go away, so we'll
+  // go away.
+  // TODO(fsamuel): Verify all of the cleanup happens.
+  // This might not yet be the case.
+  guest_->Send(new ViewHostMsg_Close(guest_->routing_id()));
+}
+
+WebKit::WebGraphicsContext3D* GuestToHostChannel::GetWebGraphicsContext3D() {
+  return context_.get();
+}
+
+void GuestToHostChannel::IssueSwapBuffers() {
+  IPC::Message* msg = new PpapiHostMsg_PPBGraphics3D_SwapBuffers(
+      ppapi::API_ID_PPB_GRAPHICS_3D, resource_);
+      msg->set_unblock(true);
+  Send(msg);
+}
+
+bool GuestToHostChannel::BindGraphics() {
+  PP_Bool result = PP_FALSE;
+  Send(new PpapiHostMsg_PPBInstance_BindGraphics(
+       ppapi::API_ID_PPB_INSTANCE, instance_, resource_,
+       &result));
+  return result == PP_TRUE;
+}
+
+bool GuestToHostChannel::InitChannel(const IPC::ChannelHandle& channel_handle) {
+  return ProxyChannel::InitWithChannel(&delegate_, channel_handle, false);
+}
+
+void GuestToHostChannel::OnMsgSupportsInterface(
+    const std::string& interface_name,
+    bool* result) {
+  // TODO(fsamuel): Does this make sense?
+  // We pretend that we support every interface?
+  *result = true;
+}
+
+void GuestToHostChannel::OnMsgSetPreferences(const ppapi::Preferences& prefs) {
+  // TODO(fsamuel): Do we care about these preferences?
+  // These look like some font stuff from WebPreferences.
+  // Perhaps this should be plumbed into our associated RenderView?
+  NOTIMPLEMENTED();
+}
+
+void GuestToHostChannel::OnMsgReserveInstanceId(PP_Instance instance,
+                                                bool* usable) {
+  // TODO(fsamuel): Only one instance per guest, for now.
+  // Maybe we should DCHECK to verify this is indeed what's happening?
+  *usable = true;
+}
+
+void GuestToHostChannel::RequestInputEvents() {
+  // Request receipt of input events
+  Send(new PpapiHostMsg_PPBInstance_RequestInputEvents(
+      ppapi::API_ID_PPB_INSTANCE, instance_, true,
+      PP_INPUTEVENT_CLASS_MOUSE |
+      PP_INPUTEVENT_CLASS_KEYBOARD |
+      PP_INPUTEVENT_CLASS_WHEEL |
+      PP_INPUTEVENT_CLASS_TOUCH));
+}
+
+void GuestToHostChannel::CreateGraphicsContext() {
+  std::vector<int32_t> attribs;
+  attribs.push_back(PP_GRAPHICS3DATTRIB_WIDTH);
+  attribs.push_back(webview_->size().width);
+  attribs.push_back(PP_GRAPHICS3DATTRIB_HEIGHT);
+  attribs.push_back(webview_->size().height);
+  attribs.push_back(PP_GRAPHICS3DATTRIB_NONE);
+
+  // Reset the HostResource if it's already set.
+  resource_ = ppapi::HostResource();
+  bool success = Send(new PpapiHostMsg_PPBGraphics3D_Create(
+        ppapi::API_ID_PPB_GRAPHICS_3D, instance_, attribs, &resource_));
+  DCHECK(success && !resource_.is_null());
+  context_.reset(new WebGraphicsContext3DGuest(
+                    new ppapi::proxy::PpapiCommandBufferProxy(
+                        resource_, this), this, webview_));
+
+  success = context_->MaybeInitializeGL();
+  DCHECK(success);
+  content::RenderThread::Get()->GetMessageLoop()->PostTask(
+           FROM_HERE,
+           base::Bind(&GuestRenderViewObserver::GraphicsContextCreated,
+                      base::Unretained(guest_)));
+}
+
+// Message handlers from ppp_instance_proxy
+void GuestToHostChannel::OnPluginMsgDidCreate(PP_Instance instance,
+    const std::vector<std::string>& argn,
+    const std::vector<std::string>& argv,
+    PP_Bool* result) {
+  // Creation is always successful if we've gotten this far.
+  *result = PP_TRUE;
+  // Request input events from the host renderer after we reply to this message.
+  instance_ = instance;
+  MessageLoop::current()->PostTask(FROM_HERE,
+           base::Bind(&GuestToHostChannel::RequestInputEvents,
+                      base::Unretained(this)));
+  // Request a graphics context from the host renderer.
+  MessageLoop::current()->PostTask(FROM_HERE,
+           base::Bind(&GuestToHostChannel::CreateGraphicsContext,
+                      base::Unretained(this)));
+  bool success = base::StringToInt(argv[2], &width_);
+  success |= base::StringToInt(argv[3], &height_);
+  DCHECK(success);
+  guest_->Send(new ViewHostMsg_ResizeGuest(guest_->routing_id(),
+                                           width_, height_));
+
+}
+
+void GuestToHostChannel::OnPluginMsgDidDestroy(PP_Instance instance) {
+  NOTIMPLEMENTED();
+}
+
+void GuestToHostChannel::OnPluginMsgDidChangeView(
+    PP_Instance instance,
+    const ppapi::ViewData& new_data,
+    PP_Bool flash_fullscreen) {
+  if (new_data.rect.size.width != width_ ||
+      new_data.rect.size.height != height_) {
+    width_ = new_data.rect.size.width;
+    height_ = new_data.rect.size.height;
+    guest_->Send(new ViewHostMsg_ResizeGuest(guest_->routing_id(),
+                                             width_, height_));
+  }
+}
+
+void GuestToHostChannel::OnPluginMsgDidChangeFocus(PP_Instance instance,
+                                                   PP_Bool has_focus) {
+  NOTIMPLEMENTED();
+}
+
+void GuestToHostChannel::OnPluginMsgHandleDocumentLoad(PP_Instance instance,
+    const ppapi::HostResource& url_loader,
+    PP_Bool* result) {
+  NOTIMPLEMENTED();
+}
+
+void GuestToHostChannel::OnMsgGetInstanceObject(
+    PP_Instance instance,
+    ppapi::proxy::SerializedVarReturnValue result) {
+  NOTIMPLEMENTED();
+  // TODO(fsamuel): We crash here during resize of the plugin
+  // Check failed: serialization_rules_.
+}
+
+void GuestToHostChannel::OnMsgHandleMessage(
+    PP_Instance instance,
+    ppapi::proxy::SerializedVarReceiveInput message_data) {
+  NOTIMPLEMENTED();
+}
+
+void GuestToHostChannel::OnMsgHandleInputEvent(
+    PP_Instance instance,
+    const ppapi::InputEventData& data) {
+  NOTIMPLEMENTED();
+}
+
+void GuestToHostChannel::OnMsgHandleFilteredInputEvent(
+    PP_Instance instance,
+    const ppapi::InputEventData& data,
+    PP_Bool* result) {
+  scoped_ptr<WebKit::WebInputEvent> web_input_event(
+      webkit::ppapi::CreateWebInputEvent(data));
+  if (webview_->handleInputEvent(*web_input_event))
+    *result = PP_TRUE;
+  else
+    *result = PP_FALSE;
+}
+
+
+void GuestToHostChannel::OnMsgSwapBuffersACK(const ppapi::HostResource& context,
+                                             int32_t pp_error) {
+  if (context_.get())
+    context_->OnSwapBuffersComplete();
+}
+
+void GuestToHostChannel::OnMsgContextLost(PP_Instance instance) {
+  // Create a new graphics context
+  WebGraphicsContext3DGuest* old_context = context_.release();
+  DCHECK(old_context);
+  CreateGraphicsContext();
+}