components/dom_distiller/core/distilled_page_prefs.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/dom_distiller/core/distilled_page_prefs.h"
   6
   7 #include "base/bind.h"
   8 #include "base/location.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "base/observer_list.h"
  11 #include "base/prefs/pref_service.h"
  12 #include "base/single_thread_task_runner.h"
  13 #include "base/thread_task_runner_handle.h"
  14 #include "components/pref_registry/pref_registry_syncable.h"
  15
  16 namespace {
  17
  18 // Path to the integer corresponding to user's preference theme.
  19 const char kFontPref[] = "dom_distiller.font_family";
  20 // Path to the integer corresponding to user's preference font family.
  21 const char kThemePref[] = "dom_distiller.theme";
  22 }
  23
  24 namespace dom_distiller {
  25
  26 DistilledPagePrefs::DistilledPagePrefs(PrefService* pref_service)
  27     : pref_service_(pref_service), weak_ptr_factory_(this) {
  28 }
  29
  30 DistilledPagePrefs::~DistilledPagePrefs() {
  31 }
  32
  33 // static
  34 void DistilledPagePrefs::RegisterProfilePrefs(
  35     user_prefs::PrefRegistrySyncable* registry) {
  36   registry->RegisterIntegerPref(
  37       kThemePref,
  38       DistilledPagePrefs::LIGHT,
  39       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
  40   registry->RegisterIntegerPref(
  41       kFontPref,
  42       DistilledPagePrefs::SANS_SERIF,
  43       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
  44 }
  45
  46 void DistilledPagePrefs::SetFontFamily(
  47     DistilledPagePrefs::FontFamily new_font_family) {
  48   pref_service_->SetInteger(kFontPref, new_font_family);
  49   base::ThreadTaskRunnerHandle::Get()->PostTask(
  50       FROM_HERE, base::Bind(&DistilledPagePrefs::NotifyOnChangeFontFamily,
  51                             weak_ptr_factory_.GetWeakPtr(), new_font_family));
  52 }
  53
  54 DistilledPagePrefs::FontFamily DistilledPagePrefs::GetFontFamily() {
  55   int font_family = pref_service_->GetInteger(kFontPref);
  56   if (font_family < 0 || font_family >= DistilledPagePrefs::FONT_FAMILY_COUNT) {
  57     // Persisted data was incorrect, trying to clean it up by storing the
  58     // default.
  59     SetFontFamily(DistilledPagePrefs::SANS_SERIF);
  60     return DistilledPagePrefs::SANS_SERIF;
  61   }
  62   return static_cast<FontFamily>(font_family);
  63 }
  64
  65 void DistilledPagePrefs::SetTheme(DistilledPagePrefs::Theme new_theme) {
  66   pref_service_->SetInteger(kThemePref, new_theme);
  67   base::ThreadTaskRunnerHandle::Get()->PostTask(
  68       FROM_HERE, base::Bind(&DistilledPagePrefs::NotifyOnChangeTheme,
  69                             weak_ptr_factory_.GetWeakPtr(), new_theme));
  70 }
  71
  72 DistilledPagePrefs::Theme DistilledPagePrefs::GetTheme() {
  73   int theme = pref_service_->GetInteger(kThemePref);
  74   if (theme < 0 || theme >= DistilledPagePrefs::THEME_COUNT) {
  75     // Persisted data was incorrect, trying to clean it up by storing the
  76     // default.
  77     SetTheme(DistilledPagePrefs::LIGHT);
  78     return DistilledPagePrefs::LIGHT;
  79   }
  80   return static_cast<Theme>(theme);
  81 }
  82
  83 void DistilledPagePrefs::AddObserver(Observer* obs) {
  84   observers_.AddObserver(obs);
  85 }
  86
  87 void DistilledPagePrefs::RemoveObserver(Observer* obs) {
  88   observers_.RemoveObserver(obs);
  89 }
  90
  91 void DistilledPagePrefs::NotifyOnChangeFontFamily(
  92     DistilledPagePrefs::FontFamily new_font_family) {
  93   FOR_EACH_OBSERVER(Observer, observers_, OnChangeFontFamily(new_font_family));
  94 }
  95
  96 void DistilledPagePrefs::NotifyOnChangeTheme(
  97     DistilledPagePrefs::Theme new_theme) {
  98   FOR_EACH_OBSERVER(Observer, observers_, OnChangeTheme(new_theme));
  99 }
 100
 101 }  // namespace dom_distiller