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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/dom_distiller/core/distilled_page_prefs.h"
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/task/single_thread_task_runner.h"
#include "components/dom_distiller/core/pref_names.h"
#include "components/pref_registry/pref_registry_syncable.h"
#include "components/prefs/pref_service.h"
namespace {
const float kDefaultFontScale = 1.0f;
// These values should agree with those in distiller_native_javascript.cc.
const float kMinFontScale = 0.4f;
const float kMaxFontScale = 3.0f;
} // namespace
namespace dom_distiller {
DistilledPagePrefs::DistilledPagePrefs(PrefService* pref_service)
: pref_service_(pref_service) {}
DistilledPagePrefs::~DistilledPagePrefs() = default;
// static
void DistilledPagePrefs::RegisterProfilePrefs(
user_prefs::PrefRegistrySyncable* registry) {
registry->RegisterIntegerPref(
prefs::kTheme, static_cast<int32_t>(mojom::Theme::kLight),
user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
registry->RegisterIntegerPref(
prefs::kFont, static_cast<int32_t>(mojom::FontFamily::kSansSerif),
user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
registry->RegisterDoublePref(prefs::kFontScale, kDefaultFontScale);
registry->RegisterBooleanPref(
prefs::kReaderForAccessibility, false,
user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
}
void DistilledPagePrefs::SetFontFamily(mojom::FontFamily new_font_family) {
pref_service_->SetInteger(prefs::kFont,
static_cast<int32_t>(new_font_family));
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(&DistilledPagePrefs::NotifyOnChangeFontFamily,
weak_ptr_factory_.GetWeakPtr(), new_font_family));
}
mojom::FontFamily DistilledPagePrefs::GetFontFamily() {
auto font_family =
static_cast<mojom::FontFamily>(pref_service_->GetInteger(prefs::kFont));
if (mojom::IsKnownEnumValue(font_family))
return font_family;
// Persisted data was incorrect, trying to clean it up by storing the
// default.
SetFontFamily(mojom::FontFamily::kSansSerif);
return mojom::FontFamily::kSansSerif;
}
void DistilledPagePrefs::SetTheme(mojom::Theme new_theme) {
pref_service_->SetInteger(prefs::kTheme, static_cast<int32_t>(new_theme));
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(&DistilledPagePrefs::NotifyOnChangeTheme,
weak_ptr_factory_.GetWeakPtr(), new_theme));
}
mojom::Theme DistilledPagePrefs::GetTheme() {
auto theme =
static_cast<mojom::Theme>(pref_service_->GetInteger(prefs::kTheme));
if (mojom::IsKnownEnumValue(theme))
return theme;
// Persisted data was incorrect, trying to clean it up by storing the
// default.
SetTheme(mojom::Theme::kLight);
return mojom::Theme::kLight;
}
void DistilledPagePrefs::SetFontScaling(float scaling) {
pref_service_->SetDouble(prefs::kFontScale, scaling);
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(&DistilledPagePrefs::NotifyOnChangeFontScaling,
weak_ptr_factory_.GetWeakPtr(), scaling));
}
float DistilledPagePrefs::GetFontScaling() {
float scaling = pref_service_->GetDouble(prefs::kFontScale);
if (scaling < kMinFontScale || scaling > kMaxFontScale) {
// Persisted data was incorrect, trying to clean it up by storing the
// default.
SetFontScaling(kDefaultFontScale);
return kDefaultFontScale;
}
return scaling;
}
void DistilledPagePrefs::AddObserver(Observer* obs) {
observers_.AddObserver(obs);
}
void DistilledPagePrefs::RemoveObserver(Observer* obs) {
observers_.RemoveObserver(obs);
}
void DistilledPagePrefs::NotifyOnChangeFontFamily(
mojom::FontFamily new_font_family) {
for (Observer& observer : observers_)
observer.OnChangeFontFamily(new_font_family);
}
void DistilledPagePrefs::NotifyOnChangeTheme(mojom::Theme new_theme) {
for (Observer& observer : observers_)
observer.OnChangeTheme(new_theme);
}
void DistilledPagePrefs::NotifyOnChangeFontScaling(float scaling) {
for (Observer& observer : observers_)
observer.OnChangeFontScaling(scaling);
}
} // namespace dom_distiller
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