OOPIF: Send page-level focus messages to all processes rendering a page.

content/browser/frame_host/frame_tree.cc

 // Copyright 2013 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/frame_host/frame_tree.h"
 
 #include <queue>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/frame_host/navigator.h"
 #include "content/browser/frame_host/render_frame_host_factory.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/frame_host/render_frame_proxy_host.h"
 #include "content/browser/renderer_host/render_view_host_factory.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
+#include "content/common/input_messages.h"
 #include "content/common/site_isolation_policy.h"
 #include "third_party/WebKit/public/web/WebSandboxFlags.h"
 
 namespace content {
 
 namespace {
 
 // Used with FrameTree::ForEach() to search for the FrameTreeNode
 // corresponding to |frame_tree_node_id| within a specific FrameTree.
 bool FrameTreeNodeForId(int frame_tree_node_id,
@@ skipping 56 matching lines @@
 // the nodes is loading.
 bool IsNodeLoading(bool* is_loading, FrameTreeNode* node) {
   if (node->IsLoading()) {
     // There is at least one node loading, so abort traversal.
     *is_loading = true;
     return false;
   }
   return true;
 }
 
+// Helper function used with FrameTree::ForEach to collect SiteInstances
+// involved in rendering a single FrameTree (which is a subset of SiteInstances
+// in main frame's proxy_hosts_ because of openers).
+bool CollectSiteInstances(std::set<SiteInstance*>* set, FrameTreeNode* node) {
+  set->insert(node->current_frame_host()->GetSiteInstance());
+  return true;
+}
+
 }  // namespace
 
 FrameTree::FrameTree(Navigator* navigator,
                      RenderFrameHostDelegate* render_frame_delegate,
                      RenderViewHostDelegate* render_view_delegate,
                      RenderWidgetHostDelegate* render_widget_delegate,
                      RenderFrameHostManager::Delegate* manager_delegate)
     : render_frame_delegate_(render_frame_delegate),
       render_view_delegate_(render_view_delegate),
       render_widget_delegate_(render_widget_delegate),
@@ skipping 297 matching lines @@
   ForEach(base::Bind(&ResetNodeLoadProgress));
   load_progress_ = 0.0;
 }
 
 bool FrameTree::IsLoading() {
   bool is_loading = false;
   ForEach(base::Bind(&IsNodeLoading, &is_loading));
   return is_loading;
 }
 
+void FrameTree::ReplicatePageFocus(bool is_focused) {
+  std::set<SiteInstance*> frame_tree_site_instances;
+  ForEach(base::Bind(&CollectSiteInstances, &frame_tree_site_instances));
+
+  // Send the focus update to main frame's proxies in all SiteInstances of
+  // other frames in this FrameTree. Note that the main frame might also know
+  // about proxies in SiteInstances for frames in a different FrameTree (e.g.,
+  // for window.open), so we can't just iterate over its proxy_hosts_ in
+  // RenderFrameHostManager.
+  for (const auto& instance : frame_tree_site_instances) {
+    if (instance == root_->current_frame_host()->GetSiteInstance())
+      continue;
+
+    RenderFrameProxyHost* proxy =
+        root_->render_manager()->GetRenderFrameProxyHost(instance);
+    proxy->Send(new InputMsg_SetFocus(proxy->GetRoutingID(), is_focused));
+  }
+}
+
 }  // namespace content