| // 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. |
| |
| #include "chrome/browser/android/widget/thumbnail_generator.h" |
| |
| #include <memory> |
| |
| #include "base/android/jni_string.h" |
| #include "base/threading/thread_restrictions.h" |
| #include "chrome/browser/android/download/download_media_parser.h" |
| #include "chrome/browser/download/thumbnail_util.h" |
| #include "content/public/browser/browser_thread.h" |
| #include "jni/ThumbnailGenerator_jni.h" |
| #include "ui/gfx/android/java_bitmap.h" |
| |
| class SkBitmap; |
| |
| using base::android::JavaParamRef; |
| using base::android::ScopedJavaGlobalRef; |
| |
| namespace { |
| |
| void ForwardJavaCallback(const ScopedJavaGlobalRef<jobject>& java_delegate, |
| const ScopedJavaGlobalRef<jstring>& content_id, |
| int icon_size, |
| const ScopedJavaGlobalRef<jobject>& callback, |
| SkBitmap thumbnail) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| JNIEnv* env = base::android::AttachCurrentThread(); |
| Java_ThumbnailGenerator_onThumbnailRetrieved( |
| env, java_delegate, content_id, icon_size, |
| thumbnail.drawsNothing() ? NULL : gfx::ConvertToJavaBitmap(&thumbnail), |
| callback); |
| } |
| |
| void OnThumbnailScaled(base::OnceCallback<void(SkBitmap)> java_callback, |
| SkBitmap scaled_thumbnail) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| std::move(java_callback).Run(std::move(scaled_thumbnail)); |
| } |
| |
| } // namespace |
| |
| ThumbnailGenerator::ThumbnailGenerator(const JavaParamRef<jobject>& jobj) |
| : java_delegate_(jobj), weak_factory_(this) { |
| DCHECK(!jobj.is_null()); |
| } |
| |
| ThumbnailGenerator::~ThumbnailGenerator() = default; |
| |
| void ThumbnailGenerator::Destroy(JNIEnv* env, |
| const JavaParamRef<jobject>& jobj) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| delete this; |
| } |
| |
| void ThumbnailGenerator::OnImageThumbnailRetrieved( |
| base::OnceCallback<void(SkBitmap)> java_callback, |
| const SkBitmap& thumbnail) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| |
| // Send the bitmap back to Java-land. |
| std::move(java_callback).Run(std::move(thumbnail)); |
| } |
| |
| void ThumbnailGenerator::OnVideoThumbnailRetrieved( |
| base::OnceCallback<void(SkBitmap)> java_callback, |
| int icon_size, |
| std::unique_ptr<DownloadMediaParser> parser, |
| bool success, |
| chrome::mojom::MediaMetadataPtr media_metadata, |
| SkBitmap thumbnail) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| |
| // Scale the bitmap before sending back to Java. |
| ScaleDownBitmap(icon_size, std::move(thumbnail), |
| base::BindOnce(&OnThumbnailScaled, std::move(java_callback))); |
| } |
| |
| void ThumbnailGenerator::RetrieveThumbnail( |
| JNIEnv* env, |
| const JavaParamRef<jobject>& jobj, |
| const JavaParamRef<jstring>& jcontent_id, |
| const JavaParamRef<jstring>& jfile_path, |
| const JavaParamRef<jstring>& jmime_type, |
| jint icon_size, |
| const JavaParamRef<jobject>& callback) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| |
| base::FilePath file_path = base::FilePath::FromUTF8Unsafe( |
| base::android::ConvertJavaStringToUTF8(env, jfile_path)); |
| |
| std::string mime_type = |
| jmime_type.is_null() |
| ? "" |
| : base::android::ConvertJavaStringToUTF8(env, jmime_type); |
| |
| // Bind everything passed back to Java. |
| auto java_callback = |
| base::BindOnce(&ForwardJavaCallback, java_delegate_, |
| ScopedJavaGlobalRef<jstring>(jcontent_id), icon_size, |
| ScopedJavaGlobalRef<jobject>(callback)); |
| |
| // Retrieve video thumbnail. |
| if (base::StartsWith(mime_type, "video/", |
| base::CompareCase::INSENSITIVE_ASCII)) { |
| auto parser = std::make_unique<DownloadMediaParser>(mime_type, file_path); |
| parser->Start(base::BindOnce(&ThumbnailGenerator::OnVideoThumbnailRetrieved, |
| weak_factory_.GetWeakPtr(), |
| std::move(java_callback), icon_size, |
| std::move(parser))); |
| return; |
| } |
| |
| // Retrieve image thumbnail. |
| auto request = std::make_unique<ImageThumbnailRequest>( |
| icon_size, |
| base::BindOnce(&ThumbnailGenerator::OnImageThumbnailRetrieved, |
| weak_factory_.GetWeakPtr(), std::move(java_callback))); |
| request->Start(file_path); |
| |
| // Dropping ownership of |request| here because it will clean itself up once |
| // the started request finishes. |
| request.release(); |
| } |
| |
| // static |
| static jlong JNI_ThumbnailGenerator_Init(JNIEnv* env, |
| const JavaParamRef<jobject>& jobj) { |
| return reinterpret_cast<intptr_t>(new ThumbnailGenerator(jobj)); |
| } |