mirror of https://github.com/M66B/FairEmail.git
493 lines
20 KiB
Java
493 lines
20 KiB
Java
package eu.faircode.email;
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/*
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This file is part of FairEmail.
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FairEmail is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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FairEmail is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FairEmail. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2018-2019 by Marcel Bokhorst (M66B)
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*/
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.content.res.Resources;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.ImageDecoder;
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import android.graphics.Paint;
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import android.graphics.Rect;
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import android.graphics.RectF;
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import android.graphics.Typeface;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.graphics.drawable.LevelListDrawable;
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import android.os.Build;
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import android.os.Handler;
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import android.text.TextUtils;
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import android.util.Base64;
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import android.util.DisplayMetrics;
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import android.view.View;
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import android.widget.TextView;
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import androidx.annotation.NonNull;
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import androidx.core.graphics.ColorUtils;
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import androidx.preference.PreferenceManager;
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import java.io.BufferedOutputStream;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.net.URL;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Semaphore;
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import java.util.concurrent.TimeUnit;
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class ImageHelper {
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private static final ExecutorService executor =
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Helper.getBackgroundExecutor(1, "image");
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static Bitmap generateIdenticon(@NonNull String email, int size, int pixels, boolean dark) {
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byte[] hash = getHash(email);
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int color = Color.HSVToColor(127, new float[]{Math.abs(email.hashCode()) % 360, 1, 1});
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Paint paint = new Paint();
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paint.setColor(color);
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Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
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Canvas canvas = new Canvas(bitmap);
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canvas.drawColor(Color.TRANSPARENT);
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float psize = (float) size / pixels;
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for (int x = 0; x < pixels; x++) {
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int i = (x > pixels / 2 ? pixels - x - 1 : x);
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for (int y = 0; y < pixels; y++) {
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if ((hash[i] >> y & 1) == 1) {
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RectF rect = new RectF(x * psize, y * psize, (x + 1) * psize, (y + 1) * psize);
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canvas.drawRect(rect, paint);
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}
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}
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}
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return bitmap;
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}
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static Bitmap generateLetterIcon(@NonNull String email, int size, boolean dark) {
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String text = null;
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for (int i = 0; i < email.length(); i++) {
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char kar = email.charAt(i);
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if (Character.isAlphabetic(kar)) {
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text = email.substring(i, i + 1).toUpperCase();
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break;
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}
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}
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if (text == null)
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return null;
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int color = Color.HSVToColor(127, new float[]{Math.abs(email.hashCode()) % 360, 1, 1});
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Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
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Canvas canvas = new Canvas(bitmap);
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canvas.drawColor(color);
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double lum = ColorUtils.calculateLuminance(color);
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Paint paint = new Paint();
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paint.setColor(lum < 0.5 ? Color.WHITE : Color.BLACK);
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paint.setTextSize(size / 2f);
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paint.setTypeface(Typeface.DEFAULT_BOLD);
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canvas.drawText(
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text,
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size / 2f - paint.measureText(text) / 2,
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size / 2f - (paint.descent() + paint.ascent()) / 2, paint);
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return bitmap;
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}
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private static byte[] getHash(String email) {
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try {
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return MessageDigest.getInstance("MD5").digest(email.getBytes());
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} catch (NoSuchAlgorithmException ignored) {
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return email.getBytes();
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}
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}
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static Drawable decodeImage(final Context context, final long id, String source, boolean show, final TextView view) {
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SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
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boolean compact = prefs.getBoolean("compact", false);
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int zoom = prefs.getInt("zoom", compact ? 0 : 1);
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boolean inline = prefs.getBoolean("inline_images", false);
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final int px = Helper.dp2pixels(context, (zoom + 1) * 24);
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final Resources.Theme theme = context.getTheme();
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final Resources res = context.getResources();
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try {
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final AnnotatedSource a = new AnnotatedSource(source);
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if (TextUtils.isEmpty(a.source)) {
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Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
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d.setBounds(0, 0, px, px);
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return d;
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}
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boolean embedded = a.source.startsWith("cid:");
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boolean data = a.source.startsWith("data:");
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if (BuildConfig.DEBUG)
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Log.i("Image show=" + show + " inline=" + inline +
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" embedded=" + embedded + " data=" + data + " source=" + a.source);
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// Embedded images
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if (embedded && (show || inline)) {
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DB db = DB.getInstance(context);
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String cid = "<" + a.source.substring(4) + ">";
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EntityAttachment attachment = db.attachment().getAttachment(id, cid);
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if (attachment == null) {
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Log.i("Image not found CID=" + cid);
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Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
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d.setBounds(0, 0, px, px);
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return d;
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} else if (!attachment.available) {
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Log.i("Image not available CID=" + cid);
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Drawable d = res.getDrawable(R.drawable.baseline_hourglass_empty_24, theme);
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d.setBounds(0, 0, px, px);
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return d;
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} else {
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int scaleToPixels = res.getDisplayMetrics().widthPixels;
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if ("image/gif".equals(attachment.type) &&
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Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
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ImageDecoder.Source isource = ImageDecoder.createSource(attachment.getFile(context));
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Drawable gif;
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try {
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gif = ImageDecoder.decodeDrawable(isource, new ImageDecoder.OnHeaderDecodedListener() {
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@Override
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public void onHeaderDecoded(
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@NonNull ImageDecoder decoder,
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@NonNull ImageDecoder.ImageInfo info,
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@NonNull ImageDecoder.Source source) {
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int factor = 1;
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while (info.getSize().getWidth() / factor > scaleToPixels)
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factor *= 2;
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decoder.setTargetSampleSize(factor);
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}
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});
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} catch (IOException ex) {
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Log.w(ex);
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gif = null;
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}
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if (gif == null) {
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Log.i("GIF not decodable CID=" + cid);
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Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
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d.setBounds(0, 0, px, px);
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return d;
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} else {
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if (view != null)
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fitDrawable(gif, a, view);
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return gif;
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}
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} else {
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Bitmap bm = Helper.decodeImage(attachment.getFile(context), scaleToPixels);
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if (bm == null) {
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Log.i("Image not decodable CID=" + cid);
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Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
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d.setBounds(0, 0, px, px);
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return d;
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} else {
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Drawable d = new BitmapDrawable(res, bm);
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DisplayMetrics dm = context.getResources().getDisplayMetrics();
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d.setBounds(0, 0, Math.round(bm.getWidth() * dm.density), Math.round(bm.getHeight() * dm.density));
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if (view != null)
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fitDrawable(d, a, view);
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return d;
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}
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}
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}
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}
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// Data URI
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if (data && (show || inline || a.tracking))
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try {
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Drawable d = getDataDrawable(context, a.source);
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if (view != null)
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fitDrawable(d, a, view);
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return d;
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} catch (IllegalArgumentException ex) {
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Log.w(ex);
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Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
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d.setBounds(0, 0, px, px);
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return d;
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}
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if (!show) {
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// Show placeholder icon
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int resid = (embedded || data ? R.drawable.baseline_photo_library_24 : R.drawable.baseline_image_24);
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Drawable d = res.getDrawable(resid, theme);
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d.setBounds(0, 0, px, px);
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return d;
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}
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// Get cache file name
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File dir = new File(context.getCacheDir(), "images");
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if (!dir.exists())
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dir.mkdir();
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final File file = new File(dir, id + "_" + Math.abs(a.source.hashCode()) + ".png");
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Drawable cached = getCachedImage(context, file);
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if (cached != null || view == null) {
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if (view == null)
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if (cached == null) {
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Drawable d = res.getDrawable(R.drawable.baseline_hourglass_empty_24, theme);
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d.setBounds(0, 0, px, px);
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return d;
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} else
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return cached;
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else
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fitDrawable(cached, a, view);
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return cached;
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}
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final LevelListDrawable lld = new LevelListDrawable();
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Drawable wait = res.getDrawable(R.drawable.baseline_hourglass_empty_24, theme);
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lld.addLevel(1, 1, wait);
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lld.setBounds(0, 0, px, px);
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lld.setLevel(1);
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executor.submit(new Runnable() {
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@Override
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public void run() {
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try {
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Drawable cached = getCachedImage(context, file);
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if (cached != null) {
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fitDrawable(cached, a, view);
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post(cached, a.source);
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return;
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}
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BitmapFactory.Options options = new BitmapFactory.Options();
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Log.i("Probe " + a.source);
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try (InputStream probe = new URL(a.source).openStream()) {
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options.inJustDecodeBounds = true;
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BitmapFactory.decodeStream(probe, null, options);
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}
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Log.i("Download " + a.source);
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Bitmap bm;
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try (InputStream is = new URL(a.source).openStream()) {
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int scaleTo = res.getDisplayMetrics().widthPixels;
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int factor = 1;
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while (options.outWidth / factor > scaleTo)
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factor *= 2;
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if (factor > 1) {
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Log.i("Download image factor=" + factor);
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options.inJustDecodeBounds = false;
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options.inSampleSize = factor;
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bm = BitmapFactory.decodeStream(is, null, options);
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} else
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bm = BitmapFactory.decodeStream(is);
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}
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if (bm == null)
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throw new FileNotFoundException("Download image failed source=" + a.source);
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Log.i("Downloaded image source=" + a.source);
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try (OutputStream os = new BufferedOutputStream(new FileOutputStream(file))) {
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bm.compress(Bitmap.CompressFormat.PNG, 90, os);
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}
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// Create drawable from bitmap
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Drawable d = new BitmapDrawable(res, bm);
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DisplayMetrics dm = context.getResources().getDisplayMetrics();
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d.setBounds(0, 0, Math.round(bm.getWidth() * dm.density), Math.round(bm.getHeight() * dm.density));
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fitDrawable(d, a, view);
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post(d, a.source);
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} catch (Throwable ex) {
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// Show broken icon
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Log.w(ex);
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int resid = (ex instanceof IOException && !(ex instanceof FileNotFoundException)
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? R.drawable.baseline_cloud_off_24
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: R.drawable.baseline_broken_image_24);
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Drawable d = res.getDrawable(resid, theme);
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d.setBounds(0, 0, px, px);
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post(d, a.source);
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}
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}
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private void post(final Drawable d, String source) {
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Log.i("Posting image=" + source);
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new Handler(context.getMainLooper()).post(new Runnable() {
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@Override
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public void run() {
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Rect bounds = d.getBounds();
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lld.addLevel(0, 0, d);
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lld.setBounds(0, 0, bounds.width(), bounds.height());
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lld.setLevel(0);
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view.setText(view.getText());
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}
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});
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}
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});
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return lld;
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} catch (Throwable ex) {
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Log.e(ex);
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Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
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d.setBounds(0, 0, px, px);
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return d;
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}
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}
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private static void fitDrawable(final Drawable d, final AnnotatedSource a, final View view) {
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Semaphore semaphore = new Semaphore(0);
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new Handler(view.getContext().getMainLooper()).post(new Runnable() {
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@Override
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public void run() {
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Rect bounds = d.getBounds();
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int w = bounds.width();
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int h = bounds.height();
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if (a.width == 0 && a.height != 0)
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a.width = Math.round(a.height * w / (float) h);
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if (a.height == 0 && a.width != 0)
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a.height = Math.round(a.width * h / (float) w);
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if (a.width != 0 && a.height != 0) {
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w = Helper.dp2pixels(view.getContext(), a.width);
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h = Helper.dp2pixels(view.getContext(), a.height);
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d.setBounds(0, 0, w, h);
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}
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float width = view.getWidth();
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if (w > width) {
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float scale = width / w;
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w = Math.round(w * scale);
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h = Math.round(h * scale);
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d.setBounds(0, 0, w, h);
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}
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semaphore.release();
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}
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});
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try {
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if (!semaphore.tryAcquire(1500, TimeUnit.MILLISECONDS))
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Log.e("fitDrawable failed");
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} catch (InterruptedException ex) {
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Log.w(ex);
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}
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}
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private static Drawable getDataDrawable(Context context, String source) {
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// "<img src=\"data:image/png;base64,iVBORw0KGgoAAA" +
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// "ANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4" +
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// "//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU" +
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// "5ErkJggg==\" alt=\"Red dot\" />";
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String base64 = source.substring(source.indexOf(',') + 1);
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byte[] bytes = Base64.decode(base64.getBytes(), 0);
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Bitmap bm = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
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if (bm == null)
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throw new IllegalArgumentException("decode byte array failed");
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Drawable d = new BitmapDrawable(context.getResources(), bm);
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DisplayMetrics dm = context.getResources().getDisplayMetrics();
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d.setBounds(0, 0, Math.round(bm.getWidth() * dm.density), Math.round(bm.getHeight() * dm.density));
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return d;
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}
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private static Drawable getCachedImage(Context context, File file) {
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if (file.exists()) {
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Log.i("Using cached " + file);
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Bitmap bm = BitmapFactory.decodeFile(file.getAbsolutePath());
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if (bm != null) {
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Drawable d = new BitmapDrawable(context.getResources(), bm);
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DisplayMetrics dm = context.getResources().getDisplayMetrics();
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d.setBounds(0, 0, Math.round(bm.getWidth() * dm.density), Math.round(bm.getHeight() * dm.density));
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return d;
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}
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}
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return null;
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}
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static class AnnotatedSource {
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private String source;
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private int width = 0;
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private int height = 0;
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private boolean tracking = false;
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// Encapsulate some ugliness
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AnnotatedSource(String source) {
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this.source = source;
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if (source != null && source.endsWith("###")) {
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int pos = source.substring(0, source.length() - 3).lastIndexOf("###");
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if (pos > 0) {
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int x = source.indexOf("x", pos + 3);
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int s = source.indexOf(":", pos + 3);
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if (x > 0 && s > x)
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try {
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this.width = Integer.parseInt(source.substring(pos + 3, x));
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this.height = Integer.parseInt(source.substring(x + 1, s));
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this.tracking = Boolean.parseBoolean(source.substring(s + 1, source.length() - 3));
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this.source = source.substring(0, pos);
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} catch (NumberFormatException ex) {
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Log.e(ex);
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}
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}
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}
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}
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AnnotatedSource(String source, int width, int height, boolean tracking) {
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this.source = source;
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this.width = width;
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this.height = height;
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this.tracking = tracking;
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}
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public String getSource() {
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return this.source;
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}
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String getAnnotated() {
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return (width == 0 && height == 0
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? source
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: source + "###" + width + "x" + height + ":" + tracking + "###");
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}
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}
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}
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