Introduce chrome.displaySource API

extensions/browser/api/display_source/display_source_api.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 "extensions/browser/api/display_source/display_source_api.h"
+#include "extensions/browser/api/display_source/display_source_connection_delegate_factory.h"
+#include "extensions/common/api/display_source.h"
+
+namespace extensions {
+
+namespace {
+
+const char kErrorNotSupported[] = "Not supported";
+const char kErrorInvalidArguments[] = "Invalid arguments";
+
+}  // namespace
+
+////////////////////////////////////////////////////////////////////////////////
+// DisplaySourceGetAvailableSinksFunction
+
+DisplaySourceGetAvailableSinksFunction::
+    ~DisplaySourceGetAvailableSinksFunction() {}
+
+ExtensionFunction::ResponseAction
+DisplaySourceGetAvailableSinksFunction::Run() {
+  if (!args_->empty()) {

[asargent_no_longer_on_chrome, 2015/11/17 00:51:55]

I don't know that it's really worth worrying about the arguments being empty in
practice.

Also, if we ever decided to add some extra (possibly optional) parameters to the
getAvailableSinks method, having this code here in older versions of the browser
could make life more difficult for developers because it would mean that those
older ever wouldn't be forward compatible. Then they'd have to either check the
browser version first or try calling the function with the new arguments, trap
the error, and try again without them. 

[Mikhail, 2015/11/17 14:07:42]

Agree, fixed.

+    return RespondNow(Error(kErrorInvalidArguments));
+  }
+
+  DisplaySourceConnectionDelegate* delegate =
+      DisplaySourceConnectionDelegateFactory::GetForBrowserContext(
+          browser_context());
+  if (!delegate) {
+    return RespondNow(Error(kErrorNotSupported));
+  }
+
+  auto success_callback = base::Bind(
+      &DisplaySourceGetAvailableSinksFunction::OnGetSinksCompleted, this);
+  auto failure_callback = base::Bind(
+      &DisplaySourceGetAvailableSinksFunction::OnGetSinksFailed, this);
+  delegate->GetAvailableSinks(success_callback, failure_callback);
+
+  return RespondLater();
+}
+
+void DisplaySourceGetAvailableSinksFunction::OnGetSinksCompleted(
+    const DisplaySourceSinkInfoList& sinks) {
+  scoped_ptr<base::ListValue> result =
+      api::display_source::GetAvailableSinks::Results::Create(sinks);
+  Respond(ArgumentList(result.Pass()));
+}
+
+void DisplaySourceGetAvailableSinksFunction::OnGetSinksFailed(
+    const std::string& reason) {
+  Respond(Error(reason));
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// DisplaySourceRequestAuthenticationFunction
+
+DisplaySourceRequestAuthenticationFunction::
+    ~DisplaySourceRequestAuthenticationFunction() {}
+
+ExtensionFunction::ResponseAction
+DisplaySourceRequestAuthenticationFunction::Run() {
+  scoped_ptr<api::display_source::RequestAuthentication::Params> params(
+      api::display_source::RequestAuthentication::Params::Create(*args_));
+  if (!params) {
+    return RespondNow(Error(kErrorInvalidArguments));
+  }
+
+  DisplaySourceConnectionDelegate* delegate =
+      DisplaySourceConnectionDelegateFactory::GetForBrowserContext(
+          browser_context());
+  if (!delegate) {
+    return RespondNow(Error(kErrorNotSupported));
+  }
+
+  auto success_callback = base::Bind(
+      &DisplaySourceRequestAuthenticationFunction::OnRequestAuthCompleted,
+      this);
+  auto failure_callback = base::Bind(
+      &DisplaySourceRequestAuthenticationFunction::OnRequestAuthFailed, this);
+  delegate->RequestAuthentication(params->sink_id, success_callback,
+                                  failure_callback);
+  return RespondLater();
+}
+
+void DisplaySourceRequestAuthenticationFunction::OnRequestAuthCompleted(
+    const DisplaySourceAuthInfo& auth_info) {
+  scoped_ptr<base::ListValue> result =
+      api::display_source::RequestAuthentication::Results::Create(auth_info);
+  Respond(ArgumentList(result.Pass()));
+}
+
+void DisplaySourceRequestAuthenticationFunction::OnRequestAuthFailed(
+    const std::string& reason) {
+  Respond(Error(reason));
+}
+
+}  // namespace extensions