Browser Plugin: New Implementation (Browser Side)

content/browser/browser_plugin/browser_plugin_embedder_helper.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/browser/browser_plugin/browser_plugin_embedder_helper.h"
+
+#include "base/time.h"
+#include "content/browser/browser_plugin/browser_plugin_embedder.h"
+#include "content/browser/renderer_host/render_view_host_impl.h"
+#include "content/browser/renderer_host/render_widget_host_impl.h"
+#include "content/browser/web_contents/web_contents_impl.h"
+#include "content/common/browser_plugin_messages.h"
+#include "content/common/view_messages.h"
+#include "content/public/browser/notification_details.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_source.h"
+#include "content/public/browser/notification_types.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/render_widget_host_view.h"
+#include "ui/gfx/size.h"
+
+namespace content {
+
+BrowserPluginEmbedderHelper::BrowserPluginEmbedderHelper(
+    BrowserPluginEmbedder* embedder,
+    WebContentsImpl* web_contents,

[Fady Samuel, 2012/08/27 15:35:00]

It seems the only reason BrowserPluginEmbedderHelper needs to know about
WebContents is for the visibility notification? How about moving that code to
BrowserPluginEmbedder?

[lazyboy, 2012/08/28 19:07:14]

Moved.
Done.

+    RenderViewHost* render_view_host)
+    : RenderViewHostObserver(render_view_host),
+      embedder_(embedder) {
+  // Listen to visibility changes so that an embedder hides its guests
+  // as well.
+  registrar_.Add(this,
+                 NOTIFICATION_WEB_CONTENTS_VISIBILITY_CHANGED,
+                 Source<WebContents>(web_contents));
+}
+
+BrowserPluginEmbedderHelper::~BrowserPluginEmbedderHelper() {
+}
+
+bool BrowserPluginEmbedderHelper::Send(IPC::Message* message) {
+  return RenderViewHostObserver::Send(message);
+}
+
+bool BrowserPluginEmbedderHelper::OnMessageReceived(
+    const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(BrowserPluginEmbedderHelper, message)
+    IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_NavigateGuest,
+                        OnNavigateGuest);
+    IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_ResizeGuest, OnResizeGuest)
+    IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_UpdateRect_ACK, OnUpdateRectACK);
+    IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_SetFocus, OnSetFocus);
+    IPC_MESSAGE_HANDLER_GENERIC(BrowserPluginHostMsg_HandleInputEvent,
+        OnHandleInputEvent(*static_cast<const IPC::SyncMessage*>(&message),
+                           &handled))
+    IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_PluginDestroyed,
+                        OnPluginDestroyed);
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void BrowserPluginEmbedderHelper::OnResizeGuest(
+    int instance_id,
+    const BrowserPluginHostMsg_ResizeGuest_Params& params) {
+  TransportDIB* damage_buffer = NULL;
+#if defined(OS_WIN)
+  // On Windows we need to duplicate the handle from the remote process.
+  HANDLE section;
+  DuplicateHandle(GetHandle(),
+                  params.damage_buffer_id.handle,
+                  GetCurrentProcess(),
+                  &section,
+                  STANDARD_RIGHTS_REQUIRED | FILE_MAP_READ | FILE_MAP_WRITE,
+                  FALSE, 0);
+  damage_buffer = TransportDIB::Map(section);
+#elif defined(OS_MACOSX)
+  // On OSX, the browser allocates all DIBs and keeps a file descriptor around
+  // for each.
+  damage_buffer = widget_helper_->MapTransportDIB(params.damage_buffer_id);
+#elif defined(OS_ANDROID)
+  damage_buffer = TransportDIB::Map(params.damage_buffer_id);
+#elif defined(OS_POSIX)
+  damage_buffer = TransportDIB::Map(params.damage_buffer_id.shmkey);
+#endif  // defined(OS_POSIX)
+  DCHECK(damage_buffer);
+  // TODO(fsamuel): Schedule this later so that we don't stall the embedder for
+  // too long.
+  embedder_->ResizeGuest(instance_id,
+                         damage_buffer,
+                         params.width,
+                         params.height,
+                         params.resize_pending,
+                         params.scale_factor);
+}
+
+void BrowserPluginEmbedderHelper::OnHandleInputEvent(
+    const IPC::SyncMessage& message,
+    bool* handled) {
+  *handled = true;
+  PickleIterator iter(message);
+
+  // TODO(fsamuel): This appears to be a monotonically increasing value.
+  int instance_id = -1;
+  const char* guest_rect_data = NULL;
+  int guest_rect_data_length = -1;
+  const char* input_event_data = NULL;
+  int input_event_data_length = -1;
+  if (!iter.SkipBytes(4) ||
+      !message.ReadInt(&iter, &instance_id) ||
+      !message.ReadData(&iter, &guest_rect_data, &guest_rect_data_length) ||
+      !message.ReadData(&iter, &input_event_data, &input_event_data_length)) {
+    *handled = false;
+    return;
+  }
+  const gfx::Rect* guest_rect =
+      reinterpret_cast<const gfx::Rect*>(guest_rect_data);
+  const WebKit::WebInputEvent* input_event =
+      reinterpret_cast<const WebKit::WebInputEvent*>(input_event_data);
+  RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>(
+      render_view_host());
+
+  // Convert the window coordinates into screen coordinates.
+  gfx::Rect guest_screen_rect(*guest_rect);
+  if (rvh->GetView())
+    guest_screen_rect.Offset(
+        rvh->GetView()->GetViewBounds().origin());
+
+  IPC::Message* reply_message =
+      IPC::SyncMessage::GenerateReply(&message);
+  embedder_->HandleInputEvent(instance_id,
+                              rvh,
+                              guest_screen_rect,
+                              *input_event,
+                              reply_message);
+}
+
+void BrowserPluginEmbedderHelper::OnNavigateGuest(int instance_id,
+                                                  int64 frame_id,
+                                                  const std::string& src,
+                                                  const gfx::Size& size) {
+  embedder_->NavigateGuest(render_view_host(), instance_id, frame_id, src,
+                           size);
+}
+
+void BrowserPluginEmbedderHelper::OnUpdateRectACK(int instance_id,
+                                                  int message_id,
+                                                  const gfx::Size& size) {
+  embedder_->UpdateRectACK(instance_id, message_id, size);
+}
+
+void BrowserPluginEmbedderHelper::OnSetFocus(int instance_id, bool focused) {
+  embedder_->SetFocus(instance_id, focused);
+}
+
+void BrowserPluginEmbedderHelper::OnPluginDestroyed(int instance_id) {
+  embedder_->PluginDestroyed(instance_id);
+}
+
+void BrowserPluginEmbedderHelper::Observe(int type,
+                                          const NotificationSource& source,
+                                          const NotificationDetails& details) {
+  switch (type) {
+    case NOTIFICATION_WEB_CONTENTS_VISIBILITY_CHANGED: {
+      bool visible = *Details<bool>(details).ptr();
+      embedder_->WebContentsVisiblitlyChanged(visible);
+      break;
+    }
+    default:
+      NOTREACHED() << "Unexpected notification type: " << type;
+  }
+}
+
+}  // namespace content