components/spellcheck/common/spellcheck_features.h

// Copyright 2016 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 COMPONENTS_SPELLCHECK_COMMON_SPELLCHECK_FEATURES_H_
#define COMPONENTS_SPELLCHECK_COMMON_SPELLCHECK_FEATURES_H_

#include "base/feature_list.h"
#include "build/build_config.h"
#include "components/spellcheck/spellcheck_buildflags.h"

namespace spellcheck {

#if BUILDFLAG(ENABLE_SPELLCHECK)

bool UseBrowserSpellChecker();

#if defined(OS_WIN)
extern const base::Feature kWinUseBrowserSpellChecker;

// If the kWinDelaySpellcheckServiceInit feature flag is enabled, don't
// initialize the spellcheck dictionaries when the SpellcheckService is
// instantiated. With this flag set: (1) Completing the initialization of the
// spellcheck service is on-demand, invoked by calling
// SpellcheckService::InitializeDictionaries with a callback to indicate when
// the operation completes. (2) The call to create the spellcheck service in
// ChromeBrowserMainParts::PreMainMessageLoopRunImpl will be skipped. Chromium
// will still by default instantiate the spellcheck service on startup for
// custom dictionary synchronization, but will not load Windows spellcheck
// dictionaries. The command line for launching the browser with Windows hybrid
// spellchecking enabled but no initialization of the spellcheck service is:
//    chrome
//    --enable-features=WinUseBrowserSpellChecker,WinDelaySpellcheckServiceInit
// and if instantiation of the spellcheck service needs to be completely
// disabled:
//     chrome
//    --enable-features=WinUseBrowserSpellChecker,WinDelaySpellcheckServiceInit
//    --disable-sync-types="Dictionary"
extern const base::Feature kWinDelaySpellcheckServiceInit;

// When set, do not perform the expensive operation of retrieving suggestions
// for all misspelled words while performing a text check. Instead retrieve
// suggestions on demand when the context menu is brought up with a misspelled
// word selected.
extern const base::Feature kWinRetrieveSuggestionsOnlyOnDemand;

bool WindowsVersionSupportsSpellchecker();
#endif  // defined(OS_WIN)

#if defined(OS_ANDROID)
extern const base::Feature kAndroidSpellChecker;
extern const base::Feature kAndroidSpellCheckerNonLowEnd;

bool IsAndroidSpellCheckFeatureEnabled();
#endif  // defined(OS_ANDROID)

#endif  // BUILDFLAG(ENABLE_SPELLCHECK)

}  // namespace spellcheck

#endif  // COMPONENTS_SPELLCHECK_COMMON_SPELLCHECK_FEATURES_H_