blob: abfa24e5c7d37a944c3df34b8b9e628ee39eb3ec [file] [log] [blame]
// Copyright 2016 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_WIDGET_THUMBNAIL_GENERATOR_H_
#define CHROME_BROWSER_ANDROID_WIDGET_THUMBNAIL_GENERATOR_H_
#include <string>
#include "base/android/jni_android.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/image_decoder.h"
// Kicks off asynchronous pipelines for creating thumbnails for local files.
// The native-side ThumbnailGenerator is owned by the Java-side and can be
// safely destroyed while a request is being processed.
class ThumbnailGenerator {
public:
explicit ThumbnailGenerator(const base::android::JavaParamRef<jobject>& jobj);
// Destroys the ThumbnailGenerator. Any currently running ImageRequest will
// delete itself when it has completed.
void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& jobj);
// Kicks off an asynchronous process to retrieve the thumbnail for the file
// located at |file_path| with a max size of |icon_size| in each dimension.
// Invokes the Java #onthumbnailRetrieved(String, int, Bitmap, boolean) method
// when finished.
void RetrieveThumbnail(
JNIEnv* env,
const base::android::JavaParamRef<jobject>& jobj,
const base::android::JavaParamRef<jstring>& jcontent_id,
const base::android::JavaParamRef<jstring>& jfile_path,
jint icon_size,
const base::android::JavaParamRef<jobject>& callback);
private:
~ThumbnailGenerator();
// Called when the thumbnail is ready. |thumbnail| will be empty on failure.
void OnThumbnailRetrieved(
const base::android::ScopedJavaGlobalRef<jstring>& content_id,
int icon_size,
const base::android::ScopedJavaGlobalRef<jobject>& callback,
const SkBitmap& thumbnail);
// This is a {@link ThumbnailGenerator} Java object.
base::android::ScopedJavaGlobalRef<jobject> java_delegate_;
base::WeakPtrFactory<ThumbnailGenerator> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(ThumbnailGenerator);
};
#endif // CHROME_BROWSER_ANDROID_WIDGET_THUMBNAIL_GENERATOR_H_