[ios] Enables chrome://user-actions.

BUG=903381

Change-Id: Ic99dc1e7d52e434a5f2b38b0fa561921aab26065
Reviewed-on: https://chromium-review.googlesource.com/c/1328821Reviewed-by: Peter Lee <pkl@chromium.org>
Commit-Queue: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611095}

ios/chrome/browser/chrome_url_constants.cc

@@ -44,8 +44,9 @@ const char kChromeUISignInInternalsHost[] = "signin-internals";
 const char kChromeUISuggestionsHost[] = "suggestions";
 const char kChromeUISyncInternalsHost[] = "sync-internals";
 const char kChromeUITermsHost[] = "terms";
-const char kChromeUIVersionHost[] = "version";
 const char kChromeUIURLKeyedMetricsHost[] = "ukm";
+const char kChromeUIUserActionsHost[] = "user-actions";
+const char kChromeUIVersionHost[] = "version";
 
 // Add hosts here to be included in chrome://chrome-urls (about:about).
 // These hosts will also be suggested by BuiltinProvider.
@@ -63,6 +64,7 @@ const char* const kChromeHostURLs[] = {
     kChromeUISuggestionsHost,
     kChromeUISyncInternalsHost,
     kChromeUITermsHost,
+    kChromeUIUserActionsHost,
     kChromeUIVersionHost,
 };
 const size_t kNumberOfChromeHostURLs = base::size(kChromeHostURLs);

ios/chrome/browser/chrome_url_constants.h

@@ -56,8 +56,9 @@ extern const char kChromeUISignInInternalsHost[];
 extern const char kChromeUISuggestionsHost[];
 extern const char kChromeUISyncInternalsHost[];
 extern const char kChromeUITermsHost[];
-extern const char kChromeUIVersionHost[];
 extern const char kChromeUIURLKeyedMetricsHost[];
+extern const char kChromeUIUserActionsHost[];
+extern const char kChromeUIVersionHost[];
 
 // Gets the hosts/domains that are shown in chrome://chrome-urls.
 extern const char* const kChromeHostURLs[];

ios/chrome/browser/ui/webui/BUILD.gn

@@ -22,6 +22,10 @@ source_set("webui") {
     "terms_ui.mm",
     "ukm_internals_ui.cc",
     "ukm_internals_ui.h",
+    "user_actions_handler.h",
+    "user_actions_handler.mm",
+    "user_actions_ui.h",
+    "user_actions_ui.mm",
     "version_handler.cc",
     "version_handler.h",
     "version_ui.h",

ios/chrome/browser/ui/webui/chrome_web_ui_ios_controller_factory.mm

@@ -21,6 +21,7 @@
 #include "ios/chrome/browser/ui/webui/sync_internals/sync_internals_ui.h"
 #include "ios/chrome/browser/ui/webui/terms_ui.h"
 #include "ios/chrome/browser/ui/webui/ukm_internals_ui.h"
+#include "ios/chrome/browser/ui/webui/user_actions_ui.h"
 #include "ios/chrome/browser/ui/webui/version_ui.h"
 #include "url/gurl.h"
 
@@ -68,6 +69,8 @@ WebUIIOSFactoryFunction GetWebUIIOSFactoryFunction(WebUIIOS* web_ui,
     return &NewWebUIIOSWithHost<AboutUI>;
   if (url_host == kChromeUICrashesHost)
     return &NewWebUIIOS<CrashesUI>;
+  if (url_host == kChromeUIFlagsHost)
+    return &NewWebUIIOS<FlagsUI>;
   if (url_host == kChromeUIGCMInternalsHost)
     return &NewWebUIIOS<GCMInternalsUI>;
   if (url_host == kChromeUINetExportHost)
@@ -82,16 +85,16 @@ WebUIIOSFactoryFunction GetWebUIIOSFactoryFunction(WebUIIOS* web_ui,
     return &NewWebUIIOS<SignInInternalsUIIOS>;
   if (url.host_piece() == kChromeUISuggestionsHost)
     return &NewWebUIIOS<suggestions::SuggestionsUI>;
+  if (url_host == kChromeUIURLKeyedMetricsHost)
+    return &NewWebUIIOS<UkmInternalsUI>;
+  if (url_host == kChromeUIUserActionsHost)
+    return &NewWebUIIOS<UserActionsUI>;
   if (url_host == kChromeUISyncInternalsHost)
     return &NewWebUIIOS<SyncInternalsUI>;
   if (url_host == kChromeUITermsHost)
     return &NewWebUIIOSWithHost<TermsUI>;
   if (url_host == kChromeUIVersionHost)
     return &NewWebUIIOS<VersionUI>;
-  if (url_host == kChromeUIFlagsHost)
-    return &NewWebUIIOS<FlagsUI>;
-  if (url_host == kChromeUIURLKeyedMetricsHost)
-    return &NewWebUIIOS<UkmInternalsUI>;
 
   return nullptr;
 }

ios/chrome/browser/ui/webui/user_actions_handler.h

+// Copyright 2018 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.
+
+#ifndef IOS_CHROME_BROWSER_UI_WEBUI_USER_ACTIONS_HANDLER_H_
+#define IOS_CHROME_BROWSER_UI_WEBUI_USER_ACTIONS_HANDLER_H_
+
+#include "base/macros.h"
+#include "base/metrics/user_metrics.h"
+#include "ios/web/public/webui/web_ui_ios_message_handler.h"
+
+// UI Handler for chrome://user-actions/
+// It listens to user action notifications and passes those notifications
+// into the Javascript to update the page.
+class UserActionsHandler : public web::WebUIIOSMessageHandler {
+ public:
+  UserActionsHandler();
+  ~UserActionsHandler() override;
+
+  // WebUIIOSMessageHandler.
+  void RegisterMessages() override;
+
+ private:
+  // Called whenever a user action is registered.
+  void OnUserAction(const std::string& action);
+
+  // The callback to invoke whenever a user action is registered.
+  base::ActionCallback action_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(UserActionsHandler);
+};
+
+#endif  // IOS_CHROME_BROWSER_UI_WEBUI_USER_ACTIONS_HANDLER_H_

ios/chrome/browser/ui/webui/user_actions_handler.mm

+// Copyright 2018 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 "ios/chrome/browser/ui/webui/user_actions_handler.h"
+
+#include "base/bind.h"
+#include "base/metrics/user_metrics.h"
+#include "base/values.h"
+#include "ios/web/public/webui/web_ui_ios.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+UserActionsHandler::UserActionsHandler()
+    : action_callback_(base::BindRepeating(&UserActionsHandler::OnUserAction,
+                                           base::Unretained(this))) {
+  base::AddActionCallback(action_callback_);
+}
+
+UserActionsHandler::~UserActionsHandler() {
+  base::RemoveActionCallback(action_callback_);
+}
+
+void UserActionsHandler::RegisterMessages() {}
+
+void UserActionsHandler::OnUserAction(const std::string& action) {
+  base::Value user_action_name(action);
+  web_ui()->CallJavascriptFunction("userActions.observeUserAction",
+                                   user_action_name);
+}

ios/chrome/browser/ui/webui/user_actions_ui.h

+// Copyright 2018 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.
+
+#ifndef IOS_CHROME_BROWSER_UI_WEBUI_USER_ACTIONS_UI_H_
+#define IOS_CHROME_BROWSER_UI_WEBUI_USER_ACTIONS_UI_H_
+
+#include "base/macros.h"
+#include "ios/web/public/webui/web_ui_ios_controller.h"
+
+// The UI for chrome://user-actions/
+class UserActionsUI : public web::WebUIIOSController {
+ public:
+  explicit UserActionsUI(web::WebUIIOS* contents);
+  ~UserActionsUI() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(UserActionsUI);
+};
+
+#endif  // IOS_CHROME_BROWSER_UI_WEBUI_USER_ACTIONS_UI_H_

ios/chrome/browser/ui/webui/user_actions_ui.mm

+// Copyright 2018 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 "ios/chrome/browser/ui/webui/user_actions_ui.h"
+
+#include "components/grit/components_resources.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
+#include "ios/chrome/browser/chrome_url_constants.h"
+#include "ios/chrome/browser/ui/webui/user_actions_handler.h"
+#include "ios/web/public/web_ui_ios_data_source.h"
+#include "ios/web/public/webui/web_ui_ios.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+UserActionsUI::UserActionsUI(web::WebUIIOS* web_ui)
+    : web::WebUIIOSController(web_ui) {
+  web_ui->AddMessageHandler(std::make_unique<UserActionsHandler>());
+
+  // Set up the chrome://user-actions/ source.
+  web::WebUIIOSDataSource* html_source =
+      web::WebUIIOSDataSource::Create(kChromeUIUserActionsHost);
+  html_source->SetDefaultResource(IDR_USER_ACTIONS_HTML);
+  html_source->AddResourcePath("user_actions.css", IDR_USER_ACTIONS_CSS);
+  html_source->AddResourcePath("user_actions.js", IDR_USER_ACTIONS_JS);
+  html_source->UseGzip();
+  web::WebUIIOSDataSource::Add(ios::ChromeBrowserState::FromWebUIIOS(web_ui),
+                               html_source);
+}
+
+UserActionsUI::~UserActionsUI() {}