+++ /dev/null
-/*
- * Copyright0 2019-2022 Soren Stoutner <soren@stoutner.com>.
- *
- * This file is part of Privacy Browser Android <https://www.stoutner.com/privacy-browser-android>.
- *
- * Privacy Browser Android is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Privacy Browser Android is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Privacy Browser Android. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package com.stoutner.privacybrowser.asynctasks;
-
-import android.app.Activity;
-import android.database.Cursor;
-import android.graphics.Bitmap;
-import android.graphics.Canvas;
-import android.net.Uri;
-import android.os.AsyncTask;
-import android.os.Build;
-import android.provider.OpenableColumns;
-
-import com.google.android.material.snackbar.Snackbar;
-
-import com.stoutner.privacybrowser.R;
-import com.stoutner.privacybrowser.views.NestedScrollWebView;
-
-import java.io.ByteArrayOutputStream;
-import java.io.OutputStream;
-import java.lang.ref.WeakReference;
-
-public class SaveWebpageImage extends AsyncTask<Void, Void, String> {
- // Declare the weak references.
- private final WeakReference<Activity> activityWeakReference;
- private final WeakReference<NestedScrollWebView> nestedScrollWebViewWeakReference;
-
- // Declare the class constants.
- private final String SUCCESS = "Success";
-
- // Declare the class variables.
- private Snackbar savingImageSnackbar;
- private Bitmap webpageBitmap;
- private final Uri fileUri;
- private final String fileNameString;
-
- // The public constructor.
- public SaveWebpageImage(Activity activity, Uri fileUri, NestedScrollWebView nestedScrollWebView) {
- // Populate the weak references.
- activityWeakReference = new WeakReference<>(activity);
- nestedScrollWebViewWeakReference = new WeakReference<>(nestedScrollWebView);
-
- // Populate the class variables.
- this.fileUri = fileUri;
-
- // Query the exact file name if the API >= 26.
- if (Build.VERSION.SDK_INT >= 26) {
- // Get a cursor from the content resolver.
- Cursor contentResolverCursor = activity.getContentResolver().query(fileUri, null, null, null);
-
- // Move to the first row.
- contentResolverCursor.moveToFirst();
-
- // Get the file name from the cursor.
- fileNameString = contentResolverCursor.getString(contentResolverCursor.getColumnIndexOrThrow(OpenableColumns.DISPLAY_NAME));
-
- // Close the cursor.
- contentResolverCursor.close();
- } else {
- // Use the file URI last path segment as the file name string.
- fileNameString = fileUri.getLastPathSegment();
- }
- }
-
- // `onPreExecute()` operates on the UI thread.
- @Override
- protected void onPreExecute() {
- // Get handles for the activity and the nested scroll WebView.
- Activity activity = activityWeakReference.get();
- NestedScrollWebView nestedScrollWebView = nestedScrollWebViewWeakReference.get();
-
- // Abort if the activity or the nested scroll WebView is gone.
- if ((activity == null) || activity.isFinishing() || nestedScrollWebView == null) {
- return;
- }
-
- // Create a saving image snackbar.
- savingImageSnackbar = Snackbar.make(nestedScrollWebView, activity.getString(R.string.processing_image) + " " + fileNameString, Snackbar.LENGTH_INDEFINITE);
-
- // Display the saving image snackbar.
- savingImageSnackbar.show();
-
- // Create a webpage bitmap. Once the Minimum API >= 26 Bitmap.Config.RBGA_F16 can be used instead of ARGB_8888. The nested scroll WebView commands must be run on the UI thread.
- webpageBitmap = Bitmap.createBitmap(nestedScrollWebView.getHorizontalScrollRange(), nestedScrollWebView.getVerticalScrollRange(), Bitmap.Config.ARGB_8888);
-
- // Create a canvas.
- Canvas webpageCanvas = new Canvas(webpageBitmap);
-
- // Draw the current webpage onto the bitmap. The nested scroll WebView commands must be run on the UI thread.
- nestedScrollWebView.draw(webpageCanvas);
- }
-
- @Override
- protected String doInBackground(Void... Void) {
- // Get a handle for the activity.
- Activity activity = activityWeakReference.get();
-
- // Abort if the activity is gone.
- if ((activity == null) || activity.isFinishing()) {
- return "";
- }
-
- // Create a webpage PNG byte array output stream.
- ByteArrayOutputStream webpageByteArrayOutputStream = new ByteArrayOutputStream();
-
- // Convert the bitmap to a PNG. `0` is for lossless compression (the only option for a PNG). This compression takes a long time. Once the minimum API >= 30 this could be replaced with WEBP_LOSSLESS.
- webpageBitmap.compress(Bitmap.CompressFormat.PNG, 0, webpageByteArrayOutputStream);
-
- // Create a file creation disposition string.
- String fileCreationDisposition = SUCCESS;
-
- try {
- // Create an image file output stream.
- OutputStream imageFileOutputStream = activity.getContentResolver().openOutputStream(fileUri);
-
- // Write the webpage image to the image file.
- webpageByteArrayOutputStream.writeTo(imageFileOutputStream);
- } catch (Exception exception) {
- // Store the error in the file creation disposition string.
- fileCreationDisposition = exception.toString();
- }
-
- // Return the file creation disposition string.
- return fileCreationDisposition;
- }
-
- // `onPostExecute()` operates on the UI thread.
- @Override
- protected void onPostExecute(String fileCreationDisposition) {
- // Get handles for the weak references.
- Activity activity = activityWeakReference.get();
- NestedScrollWebView nestedScrollWebView = nestedScrollWebViewWeakReference.get();
-
- // Abort if the activity is gone.
- if ((activity == null) || activity.isFinishing()) {
- return;
- }
-
- // Dismiss the saving image snackbar.
- savingImageSnackbar.dismiss();
-
- // Display a file creation disposition snackbar.
- if (fileCreationDisposition.equals(SUCCESS)) {
- // Display the image saved snackbar.
- Snackbar.make(nestedScrollWebView, activity.getString(R.string.saved, fileNameString), Snackbar.LENGTH_SHORT).show();
- } else {
- // Display the file saving error.
- Snackbar.make(nestedScrollWebView, activity.getString(R.string.error_saving_file, fileNameString, fileCreationDisposition), Snackbar.LENGTH_INDEFINITE).show();
- }
- }
-}
projects / PrivacyBrowserAndroid.git / blobdiff