Upstream accessibility font size preferences.

chrome/browser/android/accessibility/font_size_prefs_android.cc

+// Copyright (c) 2014 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.
+
+#include "chrome/browser/android/accessibility/font_size_prefs_android.h"
+
+#include "base/observer_list.h"
+#include "base/prefs/pref_change_registrar.h"
+#include "base/prefs/pref_service.h"
+#include "chrome/browser/profiles/profile_android.h"
+#include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/common/pref_names.h"
+#include "jni/FontSizePrefs_jni.h"
+
+FontSizePrefsAndroid::FontSizePrefsAndroid(JNIEnv* env, jobject obj)
+    : pref_service_(ProfileManager::GetActiveUserProfile()->GetPrefs()) {
+  java_ref_.Reset(env, obj);
+  pref_change_registrar_.reset(new PrefChangeRegistrar);
+  pref_change_registrar_->Init(pref_service_);
+  pref_change_registrar_->Add(
+      prefs::kWebKitFontScaleFactor,
+      base::Bind(&FontSizePrefsAndroid::OnFontScaleFactorPrefsChanged,
+                 base::Unretained(this)));
+  pref_change_registrar_->Add(
+      prefs::kWebKitForceEnableZoom,
+      base::Bind(&FontSizePrefsAndroid::OnForceEnableZoomPrefsChanged,
+                 base::Unretained(this)));
+}
+
+FontSizePrefsAndroid::~FontSizePrefsAndroid() {
+}
+
+void FontSizePrefsAndroid::Destroy(JNIEnv* env, jobject obj) {
+  delete this;
+}
+
+void FontSizePrefsAndroid::SetFontScaleFactor(JNIEnv* env,
+                                              jobject obj,
+                                              jfloat font_size) {
+  pref_service_->SetDouble(prefs::kWebKitFontScaleFactor,
+                           static_cast<double>(font_size));
+}
+
+float FontSizePrefsAndroid::GetFontScaleFactor(JNIEnv* env, jobject obj) {
+  return pref_service_->GetDouble(prefs::kWebKitFontScaleFactor);
+}
+
+void FontSizePrefsAndroid::SetForceEnableZoom(JNIEnv* env,
+                                              jobject obj,
+                                              jboolean enabled) {
+  pref_service_->SetBoolean(prefs::kWebKitForceEnableZoom, enabled);
+}
+
+bool FontSizePrefsAndroid::GetForceEnableZoom(JNIEnv* env, jobject obj) {
+  return pref_service_->GetBoolean(prefs::kWebKitForceEnableZoom);
+}
+
+void FontSizePrefsAndroid::AddObserver(JNIEnv* env,
+                                       jobject obj,
+                                       jlong observer_ptr) {
+  FontSizePrefsObserverAndroid* font_size_prefs_observer_android =
+      reinterpret_cast<FontSizePrefsObserverAndroid*>(observer_ptr);
+  observers_.AddObserver(font_size_prefs_observer_android);
+}
+
+void FontSizePrefsAndroid::RemoveObserver(JNIEnv* env,
+                                          jobject obj,
+                                          jlong observer_ptr) {
+  FontSizePrefsObserverAndroid* font_size_prefs_observer_android =
+      reinterpret_cast<FontSizePrefsObserverAndroid*>(observer_ptr);
+  observers_.RemoveObserver(font_size_prefs_observer_android);
+}
+
+bool FontSizePrefsAndroid::Register(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+jlong Init(JNIEnv* env, jobject obj) {
+  FontSizePrefsAndroid* font_size_prefs_android =
+      new FontSizePrefsAndroid(env, obj);
+  return reinterpret_cast<intptr_t>(font_size_prefs_android);
+}
+
+void FontSizePrefsAndroid::OnFontScaleFactorPrefsChanged() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  FOR_EACH_OBSERVER(Observer,
+                    observers_,
+                    OnChangeFontSize(GetFontScaleFactor(env, java_ref_.obj())));
+}
+
+void FontSizePrefsAndroid::OnForceEnableZoomPrefsChanged() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  FOR_EACH_OBSERVER(
+      Observer,
+      observers_,
+      OnChangeForceEnableZoom(GetForceEnableZoom(env, java_ref_.obj())));
+}
+
+FontSizePrefsObserverAndroid::FontSizePrefsObserverAndroid(JNIEnv* env,
+                                                           jobject obj) {
+  java_ref_.Reset(env, obj);
+}
+
+FontSizePrefsObserverAndroid::~FontSizePrefsObserverAndroid() {
+}
+
+bool FontSizePrefsObserverAndroid::Register(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+void FontSizePrefsObserverAndroid::DestroyObserverAndroid(JNIEnv* env,
+                                                          jobject obj) {
+  delete this;
+}
+
+jlong InitObserverAndroid(JNIEnv* env, jobject obj) {
+  FontSizePrefsObserverAndroid* observer_wrapper =
+      new FontSizePrefsObserverAndroid(env, obj);
+  return reinterpret_cast<intptr_t>(observer_wrapper);
+}
+
+void FontSizePrefsObserverAndroid::OnChangeFontSize(float font_size) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  Java_FontSizePrefsObserverWrapper_onChangeFontSize(
+      env, java_ref_.obj(), font_size);
+}
+
+void FontSizePrefsObserverAndroid::OnChangeForceEnableZoom(bool enabled) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  Java_FontSizePrefsObserverWrapper_onChangeForceEnableZoom(
+      env, java_ref_.obj(), enabled);
+}