chrome/browser/android/accessibility/font_size_prefs_android.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 "chrome/browser/android/accessibility/font_size_prefs_android.h"
   6
   7 #include "base/observer_list.h"
   8 #include "base/prefs/pref_change_registrar.h"
   9 #include "base/prefs/pref_service.h"
  10 #include "chrome/browser/profiles/profile_android.h"
  11 #include "chrome/browser/profiles/profile_manager.h"
  12 #include "chrome/common/pref_names.h"
  13 #include "jni/FontSizePrefs_jni.h"
  14
  15 FontSizePrefsAndroid::FontSizePrefsAndroid(JNIEnv* env, jobject obj)
  16     : pref_service_(ProfileManager::GetActiveUserProfile()->GetPrefs()) {
  17   java_ref_.Reset(env, obj);
  18   pref_change_registrar_.reset(new PrefChangeRegistrar);
  19   pref_change_registrar_->Init(pref_service_);
  20   pref_change_registrar_->Add(
  21       prefs::kWebKitFontScaleFactor,
  22       base::Bind(&FontSizePrefsAndroid::OnFontScaleFactorPrefsChanged,
  23                  base::Unretained(this)));
  24   pref_change_registrar_->Add(
  25       prefs::kWebKitForceEnableZoom,
  26       base::Bind(&FontSizePrefsAndroid::OnForceEnableZoomPrefsChanged,
  27                  base::Unretained(this)));
  28 }
  29
  30 FontSizePrefsAndroid::~FontSizePrefsAndroid() {
  31 }
  32
  33 void FontSizePrefsAndroid::SetFontScaleFactor(JNIEnv* env,
  34                                               jobject obj,
  35                                               jfloat font_size) {
  36   pref_service_->SetDouble(prefs::kWebKitFontScaleFactor,
  37                            static_cast<double>(font_size));
  38 }
  39
  40 float FontSizePrefsAndroid::GetFontScaleFactor(JNIEnv* env, jobject obj) {
  41   return pref_service_->GetDouble(prefs::kWebKitFontScaleFactor);
  42 }
  43
  44 void FontSizePrefsAndroid::SetForceEnableZoom(JNIEnv* env,
  45                                               jobject obj,
  46                                               jboolean enabled) {
  47   pref_service_->SetBoolean(prefs::kWebKitForceEnableZoom, enabled);
  48 }
  49
  50 bool FontSizePrefsAndroid::GetForceEnableZoom(JNIEnv* env, jobject obj) {
  51   return pref_service_->GetBoolean(prefs::kWebKitForceEnableZoom);
  52 }
  53
  54 void FontSizePrefsAndroid::AddObserver(JNIEnv* env,
  55                                        jobject obj,
  56                                        jlong observer_ptr) {
  57   FontSizePrefsObserverAndroid* font_size_prefs_observer_android =
  58       reinterpret_cast<FontSizePrefsObserverAndroid*>(observer_ptr);
  59   observers_.AddObserver(font_size_prefs_observer_android);
  60 }
  61
  62 void FontSizePrefsAndroid::RemoveObserver(JNIEnv* env,
  63                                           jobject obj,
  64                                           jlong observer_ptr) {
  65   FontSizePrefsObserverAndroid* font_size_prefs_observer_android =
  66       reinterpret_cast<FontSizePrefsObserverAndroid*>(observer_ptr);
  67   observers_.RemoveObserver(font_size_prefs_observer_android);
  68 }
  69
  70 bool FontSizePrefsAndroid::Register(JNIEnv* env) {
  71   return RegisterNativesImpl(env);
  72 }
  73
  74 jlong Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
  75   FontSizePrefsAndroid* font_size_prefs_android =
  76       new FontSizePrefsAndroid(env, obj);
  77   return reinterpret_cast<intptr_t>(font_size_prefs_android);
  78 }
  79
  80 void FontSizePrefsAndroid::OnFontScaleFactorPrefsChanged() {
  81   JNIEnv* env = base::android::AttachCurrentThread();
  82   FOR_EACH_OBSERVER(Observer,
  83                     observers_,
  84                     OnChangeFontSize(GetFontScaleFactor(env, java_ref_.obj())));
  85 }
  86
  87 void FontSizePrefsAndroid::OnForceEnableZoomPrefsChanged() {
  88   JNIEnv* env = base::android::AttachCurrentThread();
  89   FOR_EACH_OBSERVER(
  90       Observer,
  91       observers_,
  92       OnChangeForceEnableZoom(GetForceEnableZoom(env, java_ref_.obj())));
  93 }
  94
  95 FontSizePrefsObserverAndroid::FontSizePrefsObserverAndroid(JNIEnv* env,
  96                                                            jobject obj) {
  97   java_ref_.Reset(env, obj);
  98 }
  99
 100 FontSizePrefsObserverAndroid::~FontSizePrefsObserverAndroid() {
 101 }
 102
 103 bool FontSizePrefsObserverAndroid::Register(JNIEnv* env) {
 104   return RegisterNativesImpl(env);
 105 }
 106
 107 void FontSizePrefsObserverAndroid::DestroyObserverAndroid(JNIEnv* env,
 108                                                           jobject obj) {
 109   delete this;
 110 }
 111
 112 jlong InitObserverAndroid(JNIEnv* env, const JavaParamRef<jobject>& obj) {
 113   FontSizePrefsObserverAndroid* observer_wrapper =
 114       new FontSizePrefsObserverAndroid(env, obj);
 115   return reinterpret_cast<intptr_t>(observer_wrapper);
 116 }
 117
 118 void FontSizePrefsObserverAndroid::OnChangeFontSize(float font_size) {
 119   JNIEnv* env = base::android::AttachCurrentThread();
 120   Java_FontSizePrefsObserverWrapper_onChangeFontSize(
 121       env, java_ref_.obj(), font_size);
 122 }
 123
 124 void FontSizePrefsObserverAndroid::OnChangeForceEnableZoom(bool enabled) {
 125   JNIEnv* env = base::android::AttachCurrentThread();
 126   Java_FontSizePrefsObserverWrapper_onChangeForceEnableZoom(
 127       env, java_ref_.obj(), enabled);
 128 }