[MediaRouter] Add implementation of PresentationServiceDelegate

chrome/browser/media/router/presentation_frame_map.cc

+// Copyright 2015 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 "chrome/browser/media/router/presentation_frame_map.h"
+
+#include "chrome/browser/media/router/media_router.h"
+#include "chrome/browser/media/router/media_router_impl_factory.h"
+#include "chrome/browser/media/router/presentation_frame.h"
+#include "chrome/browser/media/router/presentation_media_sinks_observer.h"
+
+namespace media_router {
+
+PresentationFrameMap::PresentationFrameMap(content::WebContents* web_contents)
+    : web_contents_(web_contents),
+      router_(MediaRouterImplFactory::GetMediaRouterForBrowserContext(
+          web_contents_->GetBrowserContext())) {
+  DCHECK(router_);
+}
+
+PresentationFrameMap::~PresentationFrameMap() {
+}
+
+bool PresentationFrameMap::AddScreenAvailabilityListener(
+    int render_process_id,
+    int render_frame_id,
+    content::PresentationScreenAvailabilityListener* listener) {
+  if (num_sink_observers_ >= kMaxNumSources) {

[mark a. foltz, 2015/05/14 22:20:45]

I would rename this to num_screen_availability_listeners_.

[haibinlu, 2015/05/15 23:32:29]

Done.

+    return false;
+  }
+
+  RenderFrameHostId rfh_id(render_process_id, render_frame_id);
+  auto frame = GetOrAddFrame(rfh_id);

[mark a. foltz, 2015/05/14 22:20:45]

presentation_frame here and below (so as not to confuse with RenderFrameHost,
etc.)

[haibinlu, 2015/05/15 23:32:29]

Done.

+  if (frame->AddScreenAvailabilityListener(listener)) {
+    num_sink_observers_++;
+    return true;
+  }
+  return false;
+}
+
+void PresentationFrameMap::RemoveScreenAvailabilityListener(
+    int render_process_id,
+    int render_frame_id,
+    content::PresentationScreenAvailabilityListener* listener) {
+  DCHECK(listener);
+
+  RenderFrameHostId rfh_id(render_process_id, render_frame_id);
+  auto frame = frames_.get(rfh_id);
+  if (frame && frame->RemoveScreenAvailabilityListener(listener)) {
+    num_sink_observers_--;
+    return true;
+  }
+  return false;
+}
+
+void PresentationFrameMap::SetDefaultPresentationInfo(
+    int render_process_id,
+    int render_frame_id,
+    const std::string& default_presentation_url,
+    const std::string& default_presentation_id) {
+  RenderFrameHostId rfh_id(render_process_id, render_frame_id);
+  auto frame = GetOrAddFrame(rfh_id);
+  frame->SetDefaultPresentationInfo(default_presentation_url,
+                                    default_presentation_id);
+}
+
+std::string PresentationFrameMap::GetDefaultPresentationId(
+    RenderFrameHostId rfh_id) const {
+  auto frame = frames_.get(rfh_id);
+  return frame ? frame->GetDefaultPresentationId() : "";
+}
+
+void PresentationFrameMap::SetDelegateObserver(
+    int render_process_id,
+    int render_frame_id,
+    content::PresentationServiceDelegate::Observer* observer) {
+  RenderFrameHostId rfh_id(render_process_id, render_frame_id);
+  auto frame = GetOrAddFrame(rfh_id);
+  frame->SetDelegateObserver(observer);
+}
+
+DelegateObserver* PresentationFrameMap::GetDelegateObserver(
+    RenderFrameHostId rfh_id) const {
+  auto frame = frames_.get(rfh_id);
+  return frame ? frame->GetDelegateObserver(observer) : NULL;
+}
+
+void PresentationFrameMap::Reset(int render_process_id, int render_frame_id) {
+  RenderFrameHostId rfh_id(render_process_id, render_frame_id);
+  auto frame = frames_.get(rfh_id);
+  if (frame) {

[mark a. foltz, 2015/05/14 22:20:45]

Omit { } on single-line if's

+    frame->Reset();
+  }
+}
+
+scoped_ptr<PresentationFrame>* PresentationFrameMap::GetOrAddFrame(
+    RenderFrameHostId rfh_id) {
+  auto frame = frames_.get(rfh_id);
+  if (!frames_.contains(rfh_id)) {
+    frames_.add(rfh_id,
+      scoped_ptr<PresentationFrame>(new PresentationFrame(web_contents));
+  }
+  return frames_.get(rfh_id);
+}
+
+}  // namespace media_router