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// Copyright 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.
#ifndef CHROME_BROWSER_ANDROID_ACCESSIBILITY_FONT_SIZE_PREFS_ANDROID_H_
#define CHROME_BROWSER_ANDROID_ACCESSIBILITY_FONT_SIZE_PREFS_ANDROID_H_
#include <jni.h>
#include "base/android/scoped_java_ref.h"
#include "base/observer_list.h"
class PrefChangeRegistrar;
class PrefService;
/*
* Native implementation of FontSizePrefs. This class is used to get and set
* FontScaleFactor and ForceEnableZoom.
*/
class FontSizePrefsAndroid {
public:
class Observer {
public:
virtual void OnChangeFontSize(float font) = 0;
virtual void OnChangeForceEnableZoom(bool enabled) = 0;
};
FontSizePrefsAndroid(JNIEnv* env, jobject obj);
~FontSizePrefsAndroid();
void SetFontScaleFactor(JNIEnv* env, jobject obj, jfloat font);
float GetFontScaleFactor(JNIEnv* env, jobject obj);
void SetForceEnableZoom(JNIEnv* env, jobject obj, jboolean enabled);
bool GetForceEnableZoom(JNIEnv* env, jobject obj);
void AddObserver(JNIEnv* env, jobject obj, jlong obs);
void RemoveObserver(JNIEnv* env, jobject obj, jlong obs);
static bool Register(JNIEnv* env);
private:
// Callback for FontScaleFactor changes from pref change registrar.
void OnFontScaleFactorPrefsChanged();
// Callback for ForceEnableZoom changes from pref change registrar.
void OnForceEnableZoomPrefsChanged();
scoped_ptr<PrefChangeRegistrar> pref_change_registrar_;
PrefService* const pref_service_;
ObserverList<Observer> observers_;
base::android::ScopedJavaGlobalRef<jobject> java_ref_;
DISALLOW_COPY_AND_ASSIGN(FontSizePrefsAndroid);
};
/*
* Native implementation of FontSizePrefsObserverWrapper. Adds observer support
* for FontSizePrefs.
*/
class FontSizePrefsObserverAndroid : public FontSizePrefsAndroid::Observer {
public:
FontSizePrefsObserverAndroid(JNIEnv* env, jobject obj);
virtual ~FontSizePrefsObserverAndroid();
void DestroyObserverAndroid(JNIEnv* env, jobject obj);
static bool Register(JNIEnv* env);
// FontSizePrefs::Observer implementation.
virtual void OnChangeFontSize(float font) override;
virtual void OnChangeForceEnableZoom(bool enabled) override;
private:
base::android::ScopedJavaGlobalRef<jobject> java_ref_;
};
#endif // CHROME_BROWSER_ANDROID_ACCESSIBILITY_FONT_SIZE_PREFS_ANDROID_H_
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