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/memory/weak_ptr.h"
   9 #include "base/message_loop/message_loop.h"
  10 #include "base/observer_list.h"
  11 #include "base/prefs/pref_service.h"
  12 #include "components/pref_registry/pref_registry_syncable.h"
  13
  14 namespace {
  15
  16 // Path to the integer corresponding to user's preference theme.
  17 const char kFontPref[] = "dom_distiller.font_family";
  18 // Path to the integer corresponding to user's preference font family.
  19 const char kThemePref[] = "dom_distiller.theme";
  20 }
  21
  22 namespace dom_distiller {
  23
  24 DistilledPagePrefs::DistilledPagePrefs(PrefService* pref_service)
  25     : pref_service_(pref_service), weak_ptr_factory_(this) {
  26 }
  27
  28 DistilledPagePrefs::~DistilledPagePrefs() {
  29 }
  30
  31 // static
  32 void DistilledPagePrefs::RegisterProfilePrefs(
  33     user_prefs::PrefRegistrySyncable* registry) {
  34   registry->RegisterIntegerPref(
  35       kThemePref,
  36       DistilledPagePrefs::LIGHT,
  37       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
  38   registry->RegisterIntegerPref(
  39       kFontPref,
  40       DistilledPagePrefs::SANS_SERIF,
  41       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
  42 }
  43
  44 void DistilledPagePrefs::SetFontFamily(
  45     DistilledPagePrefs::FontFamily new_font_family) {
  46   pref_service_->SetInteger(kFontPref, new_font_family);
  47   base::MessageLoop::current()->PostTask(
  48       FROM_HERE,
  49       base::Bind(&DistilledPagePrefs::NotifyOnChangeFontFamily,
  50                  weak_ptr_factory_.GetWeakPtr(),
  51                  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::MessageLoop::current()->PostTask(
  68       FROM_HERE,
  69       base::Bind(&DistilledPagePrefs::NotifyOnChangeTheme,
  70                  weak_ptr_factory_.GetWeakPtr(),
  71                  new_theme));
  72 }
  73
  74 DistilledPagePrefs::Theme DistilledPagePrefs::GetTheme() {
  75   int theme = pref_service_->GetInteger(kThemePref);
  76   if (theme < 0 || theme >= DistilledPagePrefs::THEME_COUNT) {
  77     // Persisted data was incorrect, trying to clean it up by storing the
  78     // default.
  79     SetTheme(DistilledPagePrefs::LIGHT);
  80     return DistilledPagePrefs::LIGHT;
  81   }
  82   return static_cast<Theme>(theme);
  83 }
  84
  85 void DistilledPagePrefs::AddObserver(Observer* obs) {
  86   observers_.AddObserver(obs);
  87 }
  88
  89 void DistilledPagePrefs::RemoveObserver(Observer* obs) {
  90   observers_.RemoveObserver(obs);
  91 }
  92
  93 void DistilledPagePrefs::NotifyOnChangeFontFamily(
  94     DistilledPagePrefs::FontFamily new_font_family) {
  95   FOR_EACH_OBSERVER(Observer, observers_, OnChangeFontFamily(new_font_family));
  96 }
  97
  98 void DistilledPagePrefs::NotifyOnChangeTheme(
  99     DistilledPagePrefs::Theme new_theme) {
 100   FOR_EACH_OBSERVER(Observer, observers_, OnChangeTheme(new_theme));
 101 }
 102
 103 }  // namespace dom_distiller