[ios] Implements support for chrome://prefs-internals.
BUG=1006711
Change-Id: I16e839f2ac419d051a0f2ca1b40f7ad1c8362966
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1819241
Reviewed-by: Justin Cohen <[email protected]>
Commit-Queue: Rohit Rao <[email protected]>
Cr-Commit-Position: refs/heads/master@{#698873}
diff --git a/ios/chrome/browser/ui/webui/BUILD.gn b/ios/chrome/browser/ui/webui/BUILD.gn
index c275493..8b3e6b6 100644
--- a/ios/chrome/browser/ui/webui/BUILD.gn
+++ b/ios/chrome/browser/ui/webui/BUILD.gn
@@ -22,6 +22,8 @@
"mojo_web_ui_ios_controller.h",
"ntp_tiles_internals_ui.cc",
"ntp_tiles_internals_ui.h",
+ "prefs_internals_ui.cc",
+ "prefs_internals_ui.h",
"suggestions_ui.cc",
"suggestions_ui.h",
"terms_ui.h",
diff --git a/ios/chrome/browser/ui/webui/chrome_web_ui_ios_controller_factory.mm b/ios/chrome/browser/ui/webui/chrome_web_ui_ios_controller_factory.mm
index a1eb15b3..102d978 100644
--- a/ios/chrome/browser/ui/webui/chrome_web_ui_ios_controller_factory.mm
+++ b/ios/chrome/browser/ui/webui/chrome_web_ui_ios_controller_factory.mm
@@ -20,6 +20,7 @@
#include "ios/chrome/browser/ui/webui/net_export/net_export_ui.h"
#include "ios/chrome/browser/ui/webui/ntp_tiles_internals_ui.h"
#include "ios/chrome/browser/ui/webui/omaha_ui.h"
+#include "ios/chrome/browser/ui/webui/prefs_internals_ui.h"
#include "ios/chrome/browser/ui/webui/signin_internals_ui_ios.h"
#include "ios/chrome/browser/ui/webui/suggestions_ui.h"
#include "ios/chrome/browser/ui/webui/sync_internals/sync_internals_ui.h"
@@ -89,6 +90,8 @@
return &NewWebUIIOS<OmahaUI>;
if (url_host == kChromeUIPasswordManagerInternalsHost)
return &NewWebUIIOS<PasswordManagerInternalsUIIOS>;
+ if (url_host == kChromeUIPrefsInternalsHost)
+ return &NewWebUIIOS<PrefsInternalsUI>;
if (url_host == kChromeUISignInInternalsHost)
return &NewWebUIIOS<SignInInternalsUIIOS>;
if (url.host_piece() == kChromeUISuggestionsHost)
diff --git a/ios/chrome/browser/ui/webui/prefs_internals_ui.cc b/ios/chrome/browser/ui/webui/prefs_internals_ui.cc
new file mode 100644
index 0000000..052e861
--- /dev/null
+++ b/ios/chrome/browser/ui/webui/prefs_internals_ui.cc
@@ -0,0 +1,73 @@
+// Copyright 2019 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/prefs_internals_ui.h"
+
+#include <string>
+
+#include "base/json/json_writer.h"
+#include "base/memory/ref_counted_memory.h"
+#include "base/values.h"
+#include "components/prefs/pref_service.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
+#include "ios/chrome/browser/chrome_url_constants.h"
+#include "ios/chrome/browser/suggestions/suggestions_service_factory.h"
+#include "ios/web/public/thread/web_thread.h"
+#include "ios/web/public/webui/url_data_source_ios.h"
+
+namespace {
+
+// A simple data source that returns the preferences for the associated browser
+// state.
+class PrefsInternalsSource : public web::URLDataSourceIOS {
+ public:
+ explicit PrefsInternalsSource(ios::ChromeBrowserState* browser_state)
+ : browser_state_(browser_state) {}
+ ~PrefsInternalsSource() override = default;
+
+ // content::URLDataSource:
+ std::string GetSource() const override { return kChromeUIPrefsInternalsHost; }
+
+ std::string GetMimeType(const std::string& path) const override {
+ return "text/plain";
+ }
+
+ void StartDataRequest(
+ const std::string& path,
+ const web::URLDataSourceIOS::GotDataCallback& callback) override {
+ // TODO(crbug.com/1006711): Properly disable this webui provider for
+ // incognito browser states.
+ if (browser_state_->IsOffTheRecord()) {
+ callback.Run(nullptr);
+ return;
+ }
+
+ DCHECK_CURRENTLY_ON(web::WebThread::UI);
+ std::string json;
+ std::unique_ptr<base::DictionaryValue> prefs =
+ browser_state_->GetPrefs()->GetPreferenceValues(
+ PrefService::INCLUDE_DEFAULTS);
+ DCHECK(prefs);
+ CHECK(base::JSONWriter::WriteWithOptions(
+ *prefs, base::JSONWriter::OPTIONS_PRETTY_PRINT, &json));
+ callback.Run(base::RefCountedString::TakeString(&json));
+ }
+
+ private:
+ ios::ChromeBrowserState* browser_state_;
+
+ DISALLOW_COPY_AND_ASSIGN(PrefsInternalsSource);
+};
+
+} // namespace
+
+PrefsInternalsUI::PrefsInternalsUI(web::WebUIIOS* web_ui)
+ : web::WebUIIOSController(web_ui) {
+ ios::ChromeBrowserState* browser_state =
+ ios::ChromeBrowserState::FromWebUIIOS(web_ui);
+ web::URLDataSourceIOS::Add(browser_state,
+ new PrefsInternalsSource(browser_state));
+}
+
+PrefsInternalsUI::~PrefsInternalsUI() = default;
diff --git a/ios/chrome/browser/ui/webui/prefs_internals_ui.h b/ios/chrome/browser/ui/webui/prefs_internals_ui.h
new file mode 100644
index 0000000..ec2a73a
--- /dev/null
+++ b/ios/chrome/browser/ui/webui/prefs_internals_ui.h
@@ -0,0 +1,26 @@
+// Copyright 2019 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_PREFS_INTERNALS_UI_H_
+#define IOS_CHROME_BROWSER_UI_WEBUI_PREFS_INTERNALS_UI_H_
+
+#include "base/macros.h"
+#include "ios/web/public/webui/web_ui_ios_controller.h"
+
+namespace web {
+class WebUIIOS;
+}
+
+// The WebUIController for chrome://prefs-internals. Renders the current user
+// prefs.
+class PrefsInternalsUI : public web::WebUIIOSController {
+ public:
+ explicit PrefsInternalsUI(web::WebUIIOS* web_ui);
+ ~PrefsInternalsUI() override;
+
+ private:
+ DISALLOW_COPY_AND_ASSIGN(PrefsInternalsUI);
+};
+
+#endif // IOS_CHROME_BROWSER_UI_WEBUI_PREFS_INTERNALS_UI_H_
