AndroidOverlay implementation using Dialog.

content/browser/frame_host/render_frame_host_impl.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/render_frame_host_impl.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 143 matching lines @@
 // WebView).
 bool g_allow_injecting_javascript = false;
 
 // The (process id, routing id) pair that identifies one RenderFrame.
 typedef std::pair<int32_t, int32_t> RenderFrameHostID;
 typedef base::hash_map<RenderFrameHostID, RenderFrameHostImpl*>
     RoutingIDFrameMap;
 base::LazyInstance<RoutingIDFrameMap>::DestructorAtExit g_routing_id_frame_map =
     LAZY_INSTANCE_INITIALIZER;
 
+#if defined(OS_ANDROID)
+typedef base::hash_map<base::UnguessableToken,
+                       RenderFrameHostImpl*,
+                       base::UnguessableTokenHash>
+    TokenFrameMap;
+base::LazyInstance<TokenFrameMap>::Leaky g_token_frame_map =
+    LAZY_INSTANCE_INITIALIZER;
+#endif
+
 // Translate a WebKit text direction into a base::i18n one.
 base::i18n::TextDirection WebTextDirectionToChromeTextDirection(
     blink::WebTextDirection dir) {
   switch (dir) {
     case blink::WebTextDirectionLeftToRight:
       return base::i18n::LEFT_TO_RIGHT;
     case blink::WebTextDirectionRightToLeft:
       return base::i18n::RIGHT_TO_LEFT;
     default:
       NOTREACHED();
@@ skipping 175 matching lines @@
 
 // static
 RenderFrameHostImpl* RenderFrameHostImpl::FromAXTreeID(
     ui::AXTreeIDRegistry::AXTreeID ax_tree_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   ui::AXTreeIDRegistry::FrameID frame_id =
       ui::AXTreeIDRegistry::GetInstance()->GetFrameID(ax_tree_id);
   return RenderFrameHostImpl::FromID(frame_id.first, frame_id.second);
 }
 
+#if defined(OS_ANDROID)
+// static
+RenderFrameHostImpl* RenderFrameHostImpl::FromOverlayRoutingToken(
+    const base::UnguessableToken& token) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  auto it = g_token_frame_map.Get().find(token);
+  return it == g_token_frame_map.Get().end() ? nullptr : it->second;
+}
+#endif
+
 RenderFrameHostImpl::RenderFrameHostImpl(SiteInstance* site_instance,
                                          RenderViewHostImpl* render_view_host,
                                          RenderFrameHostDelegate* delegate,
                                          RenderWidgetHostDelegate* rwh_delegate,
                                          FrameTree* frame_tree,
                                          FrameTreeNode* frame_tree_node,
                                          int32_t routing_id,
                                          int32_t widget_routing_id,
                                          bool hidden,
                                          bool renderer_initiated_creation)
@@ skipping 85 matching lines @@
   // so we do it early while |this| object is still in a sane state.
   navigation_handle_.reset();
 
   // Release the WebUI instances before all else as the WebUI may accesses the
   // RenderFrameHost during cleanup.
   ClearAllWebUI();
 
   GetProcess()->RemoveRoute(routing_id_);
   g_routing_id_frame_map.Get().erase(
       RenderFrameHostID(GetProcess()->GetID(), routing_id_));
+#if defined(OS_ANDROID)
+  if (overlay_routing_token_.has_value())
+    g_token_frame_map.Get().erase(overlay_routing_token_.value());
+#endif
   BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
                           base::Bind(&NotifyRenderFrameDetachedOnIO,
                                      GetProcess()->GetID(), routing_id_));
 
   site_instance_->RemoveObserver(this);
 
   if (delegate_ && render_frame_created_)
     delegate_->RenderFrameDeleted(this);
 
   // If this was the last active frame in the SiteInstance, the
@@ skipping 33 matching lines @@
 
 int RenderFrameHostImpl::GetRoutingID() {
   return routing_id_;
 }
 
 ui::AXTreeIDRegistry::AXTreeID RenderFrameHostImpl::GetAXTreeID() {
   return ui::AXTreeIDRegistry::GetInstance()->GetOrCreateAXTreeID(
       GetProcess()->GetID(), routing_id_);
 }
 
+#if defined(OS_ANDROID)
+const base::UnguessableToken& RenderFrameHostImpl::GetOverlayRoutingToken() {
+  if (!overlay_routing_token_.has_value()) {

[dcheng, 2017/04/06 07:14:51]

Slightly shorter to omit has_value()

[liberato (no reviews please), 2017/04/10 21:24:53]

Done.

+    overlay_routing_token_ = base::UnguessableToken::Create();
+    g_token_frame_map.Get().insert(

[dcheng, 2017/04/06 07:14:51]

Out of curiosity, does emplace work now?

[liberato (no reviews please), 2017/04/10 21:24:53]

yes, thanks.  done.

+        std::make_pair(overlay_routing_token_.value(), this));
+  }
+
+  return overlay_routing_token_.value();

[dcheng, 2017/04/06 07:14:51]

Shorter alternative: return *overlay_routing_token_.

(Similar comments for uses of Optional elsewhere)

[liberato (no reviews please), 2017/04/10 21:24:53]

Done, and elsewhere.

+}
+#endif
+
 SiteInstanceImpl* RenderFrameHostImpl::GetSiteInstance() {
   return site_instance_.get();
 }
 
 RenderProcessHost* RenderFrameHostImpl::GetProcess() {
   return process_;
 }
 
 RenderFrameHostImpl* RenderFrameHostImpl::GetParent() {
   return parent_;
@@ skipping 287 matching lines @@
     IPC_MESSAGE_HANDLER(FrameHostMsg_FocusedNodeChanged, OnFocusedNodeChanged)
     IPC_MESSAGE_HANDLER(FrameHostMsg_SetHasReceivedUserGesture,
                         OnSetHasReceivedUserGesture)
 #if BUILDFLAG(USE_EXTERNAL_POPUP_MENU)
     IPC_MESSAGE_HANDLER(FrameHostMsg_ShowPopup, OnShowPopup)
     IPC_MESSAGE_HANDLER(FrameHostMsg_HidePopup, OnHidePopup)
 #endif
 #if defined(OS_ANDROID)
     IPC_MESSAGE_HANDLER(FrameHostMsg_NavigationHandledByEmbedder,
                         OnNavigationHandledByEmbedder)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_RequestOverlayRoutingToken,
+                        OnRequestOverlayRoutingToken)
 #endif
     IPC_MESSAGE_HANDLER(FrameHostMsg_ShowCreatedWindow, OnShowCreatedWindow)
   IPC_END_MESSAGE_MAP()
 
   // No further actions here, since we may have been deleted.
   return handled;
 }
 
 void RenderFrameHostImpl::OnAssociatedInterfaceRequest(
     const std::string& interface_name,
@@ skipping 1593 matching lines @@
 }
 #endif
 
 #if defined(OS_ANDROID)
 void RenderFrameHostImpl::OnNavigationHandledByEmbedder() {
   if (navigation_handle_)
     navigation_handle_->set_net_error_code(net::ERR_ABORTED);
 
   OnDidStopLoading();
 }
+
+void RenderFrameHostImpl::OnRequestOverlayRoutingToken() {
+  // Make sure that we have a token.
+  GetOverlayRoutingToken();
+
+  Send(new FrameMsg_SetOverlayRoutingToken(routing_id_,
+                                           overlay_routing_token_.value()));
+}
 #endif
 
 void RenderFrameHostImpl::OnShowCreatedWindow(int pending_widget_routing_id,
                                               WindowOpenDisposition disposition,
                                               const gfx::Rect& initial_rect,
                                               bool user_gesture) {
   delegate_->ShowCreatedWindow(GetProcess()->GetID(), pending_widget_routing_id,
                                disposition, initial_rect, user_gesture);
 }
 
@@ skipping 1228 matching lines @@
     service_manager::mojom::InterfaceProviderPtr provider;
     BindInterfaceRegistryForRenderFrameHost(mojo::MakeRequest(&provider), this);
     java_interfaces_.reset(new service_manager::InterfaceProvider);
     java_interfaces_->Bind(std::move(provider));
   }
   return java_interfaces_.get();
 }
 #endif
 
 }  // namespace content