Show Zoom Levels as content settings

chrome/browser/ui/webui/options/content_settings_handler.cc

 // Copyright (c) 2012 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/ui/webui/options/content_settings_handler.h"
 
+#include <algorithm>
 #include <map>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/content_settings/content_settings_details.h"
 #include "chrome/browser/content_settings/content_settings_utils.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/custom_handlers/protocol_handler_registry.h"
 #include "chrome/browser/custom_handlers/protocol_handler_registry_factory.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_special_storage_policy.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/browser/notifications/desktop_notification_service.h"
 #include "chrome/browser/notifications/desktop_notification_service_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/content_settings_pattern.h"
 #include "chrome/common/extensions/manifest_handlers/app_launch_info.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/common/content_switches.h"
+#include "content/public/common/page_zoom.h"
+#include "content/public/common/url_constants.h"
 #include "extensions/common/extension_set.h"
 #include "extensions/common/permissions/api_permission.h"
 #include "grit/generated_resources.h"
 #include "grit/locale_settings.h"
 #include "ui/base/l10n/l10n_util.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/login/user_manager.h"
 #endif
 
@@ skipping 24 matching lines @@
     "https://support.google.com/chrome/?p=settings_manage_exceptions";
 
 const char* kSetting = "setting";
 const char* kOrigin = "origin";
 const char* kSource = "source";
 const char* kAppName = "appName";
 const char* kAppId = "appId";
 const char* kEmbeddingOrigin = "embeddingOrigin";
 const char* kPreferencesSource = "preference";
 const char* kVideoSetting = "video";
+const char* kZoom = "zoom";
 
 const ContentSettingsTypeNameEntry kContentSettingsTypeGroupNames[] = {
   {CONTENT_SETTINGS_TYPE_COOKIES, "cookies"},
   {CONTENT_SETTINGS_TYPE_IMAGES, "images"},
   {CONTENT_SETTINGS_TYPE_JAVASCRIPT, "javascript"},
   {CONTENT_SETTINGS_TYPE_PLUGINS, "plugins"},
   {CONTENT_SETTINGS_TYPE_POPUPS, "popups"},
   {CONTENT_SETTINGS_TYPE_GEOLOCATION, "location"},
   {CONTENT_SETTINGS_TYPE_NOTIFICATIONS, "notifications"},
   {CONTENT_SETTINGS_TYPE_AUTO_SELECT_CERTIFICATE, "auto-select-certificate"},
   {CONTENT_SETTINGS_TYPE_FULLSCREEN, "fullscreen"},
   {CONTENT_SETTINGS_TYPE_MOUSELOCK, "mouselock"},
   {CONTENT_SETTINGS_TYPE_PROTOCOL_HANDLERS, "register-protocol-handler"},
   {CONTENT_SETTINGS_TYPE_MEDIASTREAM, "media-stream"},
   {CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC, "media-stream-mic"},
   {CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA, "media-stream-camera"},
   {CONTENT_SETTINGS_TYPE_PPAPI_BROKER, "ppapi-broker"},
   {CONTENT_SETTINGS_TYPE_AUTOMATIC_DOWNLOADS, "multiple-automatic-downloads"},
   {CONTENT_SETTINGS_TYPE_MIDI_SYSEX, "midi-sysex"},
 #if defined(OS_CHROMEOS)
   {CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER, "protectedContent"},
 #endif
 };
 
+// A pseudo content type. We use it to display data like a content setting even
+// though it is not a real content setting.
+const char* kZoomContentType = "zoomlevels";
+
 ContentSettingsType ContentSettingsTypeFromGroupName(const std::string& name) {
   for (size_t i = 0; i < arraysize(kContentSettingsTypeGroupNames); ++i) {
     if (name == kContentSettingsTypeGroupNames[i].name)
       return kContentSettingsTypeGroupNames[i].type;
   }
 
   NOTREACHED() << name << " is not a recognized content settings type.";
   return CONTENT_SETTINGS_TYPE_DEFAULT;
 }
 
@@ skipping 123 matching lines @@
     // Retrieve the launch URL.
     GURL launch_url =
         extensions::AppLaunchInfo::GetLaunchWebURL(extension->get());
     // Skip adding the launch URL if it is part of the web extent.
     if (web_extent.MatchesURL(launch_url))
       continue;
     AddExceptionForHostedApp(launch_url.spec(), *extension->get(), exceptions);
   }
 }
 
+// Sort ZoomLevelChanges by host and scheme
+// (a.com < http://a.com < https://a.com < b.com)

[Dan Beam, 2014/03/15 15:28:51]

nit: punctuation

[battre, 2014/03/17 23:00:19]

Done.

+bool ZoomLevelChangeLessThan(const content::HostZoomMap::ZoomLevelChange& a,

[Dan Beam, 2014/03/15 15:28:51]

nit: ZoomHostSort

[battre, 2014/03/17 23:00:19]

Done.

+                             const content::HostZoomMap::ZoomLevelChange& b) {
+  if (a.host < b.host)
+    return true;
+  if (a.host > b.host)
+    return false;
+  return a.scheme < b.scheme;

[Dan Beam, 2014/03/15 15:28:51]

nit:

return a.host == b.host ? a.scheme < b.scheme : a.host < b.host;

[battre, 2014/03/17 23:00:19]

Done.

+}
+
 }  // namespace
 
 namespace options {
 
 ContentSettingsHandler::MediaSettingsInfo::MediaSettingsInfo()
     : flash_default_setting(CONTENT_SETTING_DEFAULT),
       flash_settings_initialized(false),
       last_flash_refresh_request_id(0),
       show_flash_default_link(false),
       show_flash_exceptions_link(false),
@@ skipping 21 matching lines @@
     { "allowException", IDS_EXCEPTIONS_ALLOW_BUTTON },
     { "blockException", IDS_EXCEPTIONS_BLOCK_BUTTON },
     { "sessionException", IDS_EXCEPTIONS_SESSION_ONLY_BUTTON },
     { "askException", IDS_EXCEPTIONS_ASK_BUTTON },
     { "otr_exceptions_explanation", IDS_EXCEPTIONS_OTR_LABEL },
     { "addNewExceptionInstructions", IDS_EXCEPTIONS_ADD_NEW_INSTRUCTIONS },
     { "manageExceptions", IDS_EXCEPTIONS_MANAGE },
     { "manage_handlers", IDS_HANDLERS_MANAGE },
     { "exceptionPatternHeader", IDS_EXCEPTIONS_PATTERN_HEADER },
     { "exceptionBehaviorHeader", IDS_EXCEPTIONS_ACTION_HEADER },
+    { "exceptionZoomHeader", IDS_EXCEPTIONS_ZOOM_HEADER },
     { "embeddedOnHost", IDS_EXCEPTIONS_GEOLOCATION_EMBEDDED_ON_HOST },
     // Cookies filter.
     { "cookies_tab_label", IDS_COOKIES_TAB_LABEL },
     { "cookies_header", IDS_COOKIES_HEADER },
     { "cookies_allow", IDS_COOKIES_ALLOW_RADIO },
     { "cookies_block", IDS_COOKIES_BLOCK_RADIO },
     { "cookies_session_only", IDS_COOKIES_SESSION_ONLY_RADIO },
     { "cookies_block_3rd_party", IDS_COOKIES_BLOCK_3RDPARTY_CHKBOX },
     { "cookies_clear_when_close", IDS_COOKIES_CLEAR_WHEN_CLOSE_CHKBOX },
     { "cookies_lso_clear_when_close", IDS_COOKIES_LSO_CLEAR_WHEN_CLOSE_CHKBOX },
@@ skipping 89 matching lines @@
       IDS_AUTOMATIC_DOWNLOADS_ALLOW_RADIO },
     { "multiple-automatic-downloads_ask",
       IDS_AUTOMATIC_DOWNLOADS_ASK_RADIO },
     { "multiple-automatic-downloads_block",
       IDS_AUTOMATIC_DOWNLOADS_BLOCK_RADIO },
     // MIDI system exclusive messages
     { "midi-sysex_header", IDS_MIDI_SYSEX_TAB_LABEL },
     { "midiSysExAllow", IDS_MIDI_SYSEX_ALLOW_RADIO },
     { "midiSysExAsk", IDS_MIDI_SYSEX_ASK_RADIO },
     { "midiSysExBlock", IDS_MIDI_SYSEX_BLOCK_RADIO },
+    { "zoomlevels_header", IDS_ZOOMLEVELS_HEADER_AND_TAB_LABEL },
+    { "zoomLevelsManage", IDS_ZOOMLEVELS_MANAGE_BUTTON },
   };
 
   RegisterStrings(localized_strings, resources, arraysize(resources));
   RegisterTitle(localized_strings, "contentSettingsPage",
                 IDS_CONTENT_SETTINGS_TITLE);
 
   // Register titles for each of the individual settings whose exception
   // dialogs will be processed by |ContentSettingsHandler|.
   RegisterTitle(localized_strings, "cookies",
                 IDS_COOKIES_TAB_LABEL);
@@ skipping 18 matching lines @@
                 IDS_PROTECTED_CONTENT_TAB_LABEL);
 #endif
   RegisterTitle(localized_strings, "media-stream",
                 IDS_MEDIA_STREAM_TAB_LABEL);
   RegisterTitle(localized_strings, "ppapi-broker",
                 IDS_PPAPI_BROKER_TAB_LABEL);
   RegisterTitle(localized_strings, "multiple-automatic-downloads",
                 IDS_AUTOMATIC_DOWNLOADS_TAB_LABEL);
   RegisterTitle(localized_strings, "midi-sysex",
                 IDS_MIDI_SYSEX_TAB_LABEL);
+  RegisterTitle(localized_strings, "zoomlevels",
+                IDS_ZOOMLEVELS_HEADER_AND_TAB_LABEL);
 
   localized_strings->SetBoolean("newContentSettings",
       CommandLine::ForCurrentProcess()->HasSwitch(switches::kContentSettings2));
   localized_strings->SetString(
       "exceptionsLearnMoreUrl",
       google_util::StringAppendGoogleLocaleParam(
           kExceptionsLearnMoreUrl));
 }
 
 void ContentSettingsHandler::InitializeHandler() {
@@ skipping 28 matching lines @@
   pref_change_registrar_.Add(
       prefs::kVideoCaptureAllowed,
       base::Bind(&ContentSettingsHandler::UpdateMediaSettingsView,
                  base::Unretained(this)));
   pref_change_registrar_.Add(
       prefs::kEnableDRM,
       base::Bind(
           &ContentSettingsHandler::UpdateProtectedContentExceptionsButton,
           base::Unretained(this)));
 
+  content::HostZoomMap* host_zoom_map =
+      content::HostZoomMap::GetForBrowserContext(profile);
+  host_zoom_map_subscription_ =
+      host_zoom_map->AddZoomLevelChangedCallback(
+          base::Bind(&ContentSettingsHandler::OnZoomLevelChanged,
+                     base::Unretained(this)));
+
   flash_settings_manager_.reset(new PepperFlashSettingsManager(this, profile));
 }
 
 void ContentSettingsHandler::InitializePage() {
   media_settings_ = MediaSettingsInfo();
   RefreshFlashMediaSettings();
 
   UpdateHandlersEnabledRadios();
   UpdateAllExceptionsViewsFromModel();
   UpdateProtectedContentExceptionsButton();
@@ skipping 171 matching lines @@
   web_ui()->CallJavascriptFunction(
       "ContentSettings.updateHandlersEnabledRadios",
       handlers_enabled);
 }
 
 void ContentSettingsHandler::UpdateAllExceptionsViewsFromModel() {
   for (int type = CONTENT_SETTINGS_TYPE_DEFAULT + 1;
        type < CONTENT_SETTINGS_NUM_TYPES; ++type) {
     UpdateExceptionsViewFromModel(static_cast<ContentSettingsType>(type));
   }
+  // Zoom levels are no actual content type so we need to handle them
+  // separately.

[Dan Beam, 2014/03/15 15:28:51]

nit: are not actually a content type,

[battre, 2014/03/17 23:00:19]

Done.

+  UpdateZoomLevelsExceptionsView();
 }
 
 void ContentSettingsHandler::UpdateAllOTRExceptionsViewsFromModel() {
   for (int type = CONTENT_SETTINGS_TYPE_DEFAULT + 1;
        type < CONTENT_SETTINGS_NUM_TYPES; ++type) {
     UpdateOTRExceptionsViewFromModel(static_cast<ContentSettingsType>(type));
   }
 }
 
 void ContentSettingsHandler::UpdateExceptionsViewFromModel(
@@ skipping 261 matching lines @@
     web_ui()->CallJavascriptFunction(
         "ContentSettings.showExperimentalWebMIDISettings",
         base::FundamentalValue(true));
   }
 
   UpdateSettingDefaultFromModel(CONTENT_SETTINGS_TYPE_MIDI_SYSEX);
   UpdateExceptionsViewFromHostContentSettingsMap(
       CONTENT_SETTINGS_TYPE_MIDI_SYSEX);
 }
 
+void ContentSettingsHandler::UpdateZoomLevelsExceptionsView() {
+  base::ListValue zoom_levels_exceptions;
+
+  content::HostZoomMap* host_zoom_map =
+      content::HostZoomMap::GetForBrowserContext(Profile::FromWebUI(web_ui()));
+  content::HostZoomMap::ZoomLevelVector zoom_levels(
+      host_zoom_map->GetAllZoomLevels());
+  std::sort(zoom_levels.begin(), zoom_levels.end(), ZoomLevelChangeLessThan);
+
+  for (content::HostZoomMap::ZoomLevelVector::const_iterator i =
+           zoom_levels.begin();
+       i != zoom_levels.end();
+       ++i) {
+    base::DictionaryValue* exception = new base::DictionaryValue();

[Dan Beam, 2014/03/15 15:28:51]

nit: scoped_ptr + release() later

[battre, 2014/03/17 23:00:19]

Done.

+    switch (i->mode) {
+      case content::HostZoomMap::ZOOM_CHANGED_FOR_HOST:
+        exception->SetString(kOrigin, i->host);
+        break;
+      case content::HostZoomMap::ZOOM_CHANGED_FOR_SCHEME_AND_HOST:
+        exception->SetString(
+            kOrigin, i->scheme + content::kStandardSchemeSeparator + i->host);
+        break;
+      case content::HostZoomMap::ZOOM_CHANGED_TEMPORARY_ZOOM:
+        NOTREACHED();
+    }
+    exception->SetString(kSetting,
+                         ContentSettingToString(CONTENT_SETTING_DEFAULT));
+
+    // Calculate the zoom percent from the factor. Round up to the nearest whole
+    // number.
+    int zoom_percent = static_cast<int>(
+        content::ZoomLevelToZoomFactor(i->zoom_level) * 100 + 0.5);

[Dan Beam, 2014/03/15 15:28:51]

This is mildly cryptic but I didn't know std::round() is c++11

[battre, 2014/03/17 23:00:19]

Ok, I'll leave it as it is.

+    exception->SetString(
+        kZoom,
+        l10n_util::GetStringFUTF16(IDS_ZOOM_PERCENT,
+                                   base::IntToString16(zoom_percent)));
+    exception->SetString(kSource, kPreferencesSource);
+    // Append the new entry to the list and map.
+    zoom_levels_exceptions.Append(exception);
+  }
+
+  base::StringValue type_string(kZoomContentType);
+  web_ui()->CallJavascriptFunction("ContentSettings.setExceptions",
+                                   type_string, zoom_levels_exceptions);
+}
+
 void ContentSettingsHandler::UpdateExceptionsViewFromHostContentSettingsMap(
     ContentSettingsType type) {
   base::ListValue exceptions;
   GetExceptionsFromHostContentSettingsMap(
       GetContentSettingsMap(), type, &exceptions);
   base::StringValue type_string(ContentSettingsTypeToGroupName(type));
   web_ui()->CallJavascriptFunction("ContentSettings.setExceptions", type_string,
                                    exceptions);
 
   UpdateExceptionsViewFromOTRHostContentSettingsMap(type);
@@ skipping 177 matching lines @@
         ContentSettingsPattern::FromString(pattern),
         secondary_pattern.empty()
             ? ContentSettingsPattern::Wildcard()
             : ContentSettingsPattern::FromString(secondary_pattern),
         type,
         std::string(),
         NULL);
   }
 }
 
+void ContentSettingsHandler::RemoveZoomLevelException(
+    const base::ListValue* args, size_t arg_index) {
+  std::string mode;
+  bool rv = args->GetString(arg_index++, &mode);

[Dan Beam, 2014/03/15 15:28:51]

Can you just make this arg_index?

[battre, 2014/03/17 23:00:19]

I could, but I think I would rather keep consistency with all the other
Remove...() functions here and actually I find this pretty readable.

[Dan Beam, 2014/03/18 00:10:34]

the existing code is:
1) silly
2) local to this file (afaict), and probably copy pasted from an original
example
3) continuing to result in more copy pasta of silly code

I don't like to ask people to update unrelated code but I don't think you should
copy this.

+  DCHECK(rv);
+
+  std::string pattern;
+  rv = args->GetString(arg_index++, &pattern);

[Dan Beam, 2014/03/15 15:28:51]

and arg_index + 1

[battre, 2014/03/17 23:00:19]

see above.

+  DCHECK(rv);
+
+  content::HostZoomMap* host_zoom_map =
+      content::HostZoomMap::GetForBrowserContext(Profile::FromWebUI(web_ui()));
+  double default_level = host_zoom_map->GetDefaultZoomLevel();
+
+  std::string::size_type scheme_separator_position =
+      pattern.find(content::kStandardSchemeSeparator);
+  if (scheme_separator_position == std::string::npos) {
+    host_zoom_map->SetZoomLevelForHost(pattern, default_level);
+  } else {
+    std::string scheme = pattern.substr(0, scheme_separator_position);
+    std::string host = pattern.substr(
+        scheme_separator_position + strlen(content::kStandardSchemeSeparator));
+    host_zoom_map->SetZoomLevelForHostAndScheme(scheme, host, default_level);
+  }
+}
+
 void ContentSettingsHandler::RegisterMessages() {
   web_ui()->RegisterMessageCallback("setContentFilter",
       base::Bind(&ContentSettingsHandler::SetContentFilter,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("removeException",
       base::Bind(&ContentSettingsHandler::RemoveException,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("setException",
       base::Bind(&ContentSettingsHandler::SetException,
                  base::Unretained(this)));
@@ skipping 107 matching lines @@
     default:
       break;
   }
 }
 
 void ContentSettingsHandler::RemoveException(const base::ListValue* args) {
   size_t arg_i = 0;
   std::string type_string;
   CHECK(args->GetString(arg_i++, &type_string));
 
+  // Zoom levels are no actual content type so we need to handle them
+  // separately. They would not be recognized by
+  // ContentSettingsTypeFromGroupName.
+  if (type_string == kZoomContentType) {
+    RemoveZoomLevelException(args, arg_i);
+    return;
+  }
+
   ContentSettingsType type = ContentSettingsTypeFromGroupName(type_string);
   switch (type) {
     case CONTENT_SETTINGS_TYPE_NOTIFICATIONS:
       RemoveNotificationException(args, arg_i);
       break;
     case CONTENT_SETTINGS_TYPE_MEDIASTREAM:
       RemoveMediaException(args, arg_i);
       break;
     default:
       RemoveExceptionFromHostContentSettingsMap(args, arg_i, type);
@@ skipping 98 matching lines @@
   ShowFlashMediaLink(DEFAULT_SETTING, false);
   ShowFlashMediaLink(EXCEPTIONS, false);
 
   PrefService* prefs = Profile::FromWebUI(web_ui())->GetPrefs();
   if (prefs->GetBoolean(prefs::kPepperFlashSettingsEnabled))
     RefreshFlashMediaSettings();
   else
     media_settings_.flash_settings_initialized = false;
 }
 
+void ContentSettingsHandler::OnZoomLevelChanged(
+    const content::HostZoomMap::ZoomLevelChange& change) {
+  UpdateZoomLevelsExceptionsView();
+}
+
 void ContentSettingsHandler::ShowFlashMediaLink(LinkType link_type, bool show) {
   bool& show_link = link_type == DEFAULT_SETTING ?
       media_settings_.show_flash_default_link :
       media_settings_.show_flash_exceptions_link;
   if (show_link != show) {
     web_ui()->CallJavascriptFunction(
         link_type == DEFAULT_SETTING ?
             "ContentSettings.showMediaPepperFlashDefaultLink" :
             "ContentSettings.showMediaPepperFlashExceptionsLink",
         base::FundamentalValue(show));
@@ skipping 49 matching lines @@
 void ContentSettingsHandler::UpdateProtectedContentExceptionsButton() {
   PrefService* prefs = Profile::FromWebUI(web_ui())->GetPrefs();
   // Exceptions apply only when the feature is enabled.
   bool enable_exceptions = prefs->GetBoolean(prefs::kEnableDRM);
   web_ui()->CallJavascriptFunction(
       "ContentSettings.enableProtectedContentExceptions",
       base::FundamentalValue(enable_exceptions));
 }
 
 }  // namespace options