Index: chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappDataStorage.java |
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappDataStorage.java b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappDataStorage.java |
new file mode 100644 |
index 0000000000000000000000000000000000000000..d72181c9303aeecd9cf8b07cf3865d2da0c7eee1 |
--- /dev/null |
+++ b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappDataStorage.java |
@@ -0,0 +1,156 @@ |
+// Copyright 2015 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. |
+ |
+package org.chromium.chrome.browser.webapps; |
+ |
+import android.content.Context; |
+import android.content.SharedPreferences; |
+import android.graphics.Bitmap; |
+import android.graphics.BitmapFactory; |
+import android.os.AsyncTask; |
+import android.text.TextUtils; |
+import android.util.Base64; |
+ |
+import java.io.ByteArrayOutputStream; |
+ |
+/** |
+ * This is a class used to store data about an installed webapp. It uses SharedPreferences |
+ * to persist the data to disk. |
+ */ |
+public class WebappDataStorage { |
+ |
+ private static final String KEY_SPLASH_ICON = "splash_icon"; |
+ private static final String KEY_LAST_USED = "last_used"; |
+ |
+ private final SharedPreferences mPreferences; |
+ |
+ /** |
+ * Opens an instance of WebappDataStorage for the webapp specified. |
+ * @param context The context to open the SharedPreferences. |
+ * @param webappId The ID of the webapp which is being opened. |
+ */ |
+ public static WebappDataStorage open(Context context, String webappId) { |
+ WebappDataStorage storage = new WebappDataStorage( |
+ context.getApplicationContext(), webappId); |
+ storage.updateLastAccessedTime(); |
+ return storage; |
+ } |
+ |
+ /** |
+ * Retrieve the time which this WebappDataStorage was last opened using |
gone
2015/08/26 21:56:14
nit: Asynchronously retrieves the time which this
Lalit Maganti
2015/08/26 22:33:53
Done.
|
+ * {@link WebappDataStorage#open(Context, String)} asynchrously. |
+ * @param context The context to read the SharedPreferences file. |
+ * @param webappId The ID of the webapp the accessed time is being read for. |
+ * @param callback Called when the last accessed time has been retrieved. |
+ */ |
+ public static WebappDataStorage getLastUsedTime(Context context, String webappId, |
+ final FetchCallback<String> callback) { |
+ return new WebappDataStorage(context.getApplicationContext(), webappId); |
+ } |
+ |
+ private WebappDataStorage(Context context, String webappId) { |
+ mPreferences = context.getSharedPreferences("webapp_" + webappId, |
+ Context.MODE_PRIVATE); |
+ } |
+ |
+ /* |
+ * Retrieve the splash screen image associated with with the current webapp |
gone
2015/08/26 21:56:14
nit: Asynchronously retrieves the splash screen im
Lalit Maganti
2015/08/26 22:33:53
Done.
|
+ * asynchrously. |
+ * @param callback Called when the splash screen image has been retrieved. |
+ * May be null if no image was found. |
+ */ |
+ public void getSplashscreenImage(final FetchCallback<Bitmap> callback) { |
+ new BitmapFetchTask(KEY_SPLASH_ICON, callback).execute(); |
+ } |
+ |
+ /* |
+ * Update the information associated with the webapp with the specified |
+ * data. |
gone
2015/08/26 21:56:14
nit: wrap at 100.
Lalit Maganti
2015/08/26 22:33:54
Done.
|
+ * @param splashscreenImage The image which should be shown on the splash screen of the webapp. |
+ */ |
+ public void updateSplashscreenImage(final Bitmap splashscreenImage) { |
+ new UpdateTask(splashscreenImage).execute(); |
+ } |
+ |
+ private void getLastAccessedTime(final FetchCallback<String> callback) { |
+ new AsyncTask<Void, Void, String>() { |
+ @Override |
+ protected final String doInBackground(Void... nothing) { |
+ return mPreferences.getString(KEY_LAST_USED, null); |
+ } |
+ |
+ @Override |
+ protected final void onPostExecute(String result) { |
+ callback.run(result); |
+ } |
+ }.execute(); |
+ } |
+ |
+ private WebappDataStorage updateLastAccessedTime() { |
+ new AsyncTask<Void, Void, Void>() { |
+ @Override |
+ protected final Void doInBackground(Void... nothing) { |
+ mPreferences.edit() |
+ .putLong(KEY_LAST_USED, System.currentTimeMillis()) |
gone
2015/08/26 21:56:14
nit: indent by 8.
Lalit Maganti
2015/08/26 22:33:53
Done.
|
+ .commit(); |
+ return null; |
+ } |
+ }.execute(); |
+ return this; |
+ } |
+ |
+ /** |
+ * Callback class used when items are requested from the storage. |
gone
2015/08/26 21:56:14
nit: Called after data has been retrieved from sto
Lalit Maganti
2015/08/26 22:33:53
Done.
|
+ */ |
+ public interface FetchCallback<T> { |
+ public void run(T readObject); |
gone
2015/08/26 21:56:14
run() -> onDataRetrieved().
Lalit Maganti
2015/08/26 22:33:54
Done.
|
+ } |
+ |
+ private final class BitmapFetchTask extends AsyncTask<Void, Void, Bitmap> { |
+ |
+ private final String mKey; |
+ |
gone
2015/08/26 21:56:14
nit: remove newline?
Lalit Maganti
2015/08/26 22:33:54
Done.
|
+ private final FetchCallback<Bitmap> mCallback; |
+ |
+ public BitmapFetchTask(String key, FetchCallback<Bitmap> callback) { |
+ mKey = key; |
+ mCallback = callback; |
+ } |
+ |
+ @Override |
+ protected final Bitmap doInBackground(Void... nothing) { |
+ String icon = mPreferences.getString(mKey, null); |
+ if (TextUtils.isEmpty(icon)) return null; |
+ |
+ byte[] decoded = Base64.decode(icon, Base64.DEFAULT); |
+ return BitmapFactory.decodeByteArray(decoded, 0, decoded.length); |
+ } |
+ |
+ @Override |
+ protected final void onPostExecute(Bitmap result) { |
+ mCallback.run(result); |
+ } |
+ } |
+ |
+ private final class UpdateTask extends AsyncTask<Void, Void, Void> { |
+ |
+ private final Bitmap mSplashImage; |
+ |
+ public UpdateTask(Bitmap splashImage) { |
+ mSplashImage = splashImage; |
+ } |
+ |
+ @Override |
+ protected Void doInBackground(Void... nothing) { |
+ ByteArrayOutputStream output = new ByteArrayOutputStream(); |
+ mSplashImage.compress(Bitmap.CompressFormat.PNG, 100, output); |
+ String splashImageString = Base64.encodeToString( |
+ output.toByteArray(), Base64.DEFAULT); |
+ mPreferences.edit() |
+ .putString(KEY_SPLASH_ICON, splashImageString) |
Lalit Maganti
2015/08/26 22:33:53
Also indented at 8 to match above.
|
+ .commit(); |
+ return null; |
+ } |
+ } |
+} |