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Code Issues Releases Wiki Activity

Refactoring

This commit is contained in:
M66B 2019-10-04 21:25:52 +02:00
parent 8191d28c54
commit f09100f784
6 changed files with 530 additions and 522 deletions
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6
app/src/main/java/eu/faircode/email/AdapterMessage.java
View File

@ -1491,7 +1491,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
Spanned spanned = HtmlHelper.fromHtml(html, new Html.ImageGetter() {
@Override
public Drawable getDrawable(String source) {
Drawable drawable = HtmlHelper.decodeImage(context, message.id, source, show_images, tvBody);
Drawable drawable = ImageHelper.decodeImage(context, message.id, source, show_images, tvBody);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
if (drawable instanceof AnimatedImageDrawable)
@ -3016,7 +3016,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
if (!show_images) {
ImageSpan[] image = buffer.getSpans(off, off, ImageSpan.class);
if (image.length > 0 && image[0].getSource() != null) {
HtmlHelper.AnnotatedSource a = new HtmlHelper.AnnotatedSource(image[0].getSource());
ImageHelper.AnnotatedSource a = new ImageHelper.AnnotatedSource(image[0].getSource());
Uri uri = Uri.parse(a.getSource());
if ("http".equals(uri.getScheme()) || "https".equals(uri.getScheme())) {
onOpenLink(uri, null);
@ -4237,7 +4237,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
protected Drawable onExecute(Context context, Bundle args) throws Throwable {
long id = args.getLong("id");
String source = args.getString("source");
return HtmlHelper.decodeImage(context, id, source, true, null);
return ImageHelper.decodeImage(context, id, source, true, null);
}
@Override

4
app/src/main/java/eu/faircode/email/ContactInfo.java
View File

@ -176,9 +176,9 @@ public class ContactInfo {
boolean identicons = prefs.getBoolean("identicons", false);
if (identicons) {
identicon = true;
info.bitmap = IconHelper.generateIdenticon(key, dp, 5, dark);
info.bitmap = ImageHelper.generateIdenticon(key, dp, 5, dark);
} else
info.bitmap = IconHelper.generateLetterIcon(key, dp, dark);
info.bitmap = ImageHelper.generateLetterIcon(key, dp, dark);
}
}

2
app/src/main/java/eu/faircode/email/FragmentCompose.java
View File

@ -3144,7 +3144,7 @@ public class FragmentCompose extends FragmentBase {
new Html.ImageGetter() {
@Override
public Drawable getDrawable(String source) {
return HtmlHelper.decodeImage(context, id, source, show_images, tvReference);
return ImageHelper.decodeImage(context, id, source, show_images, tvReference);
}
},
null);

452
app/src/main/java/eu/faircode/email/HtmlHelper.java
View File

@ -21,27 +21,15 @@ package eu.faircode.email;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.ImageDecoder;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LevelListDrawable;
import android.net.Uri;
import android.os.Build;
import android.os.Handler;
import android.text.Html;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.style.ForegroundColorSpan;
import android.util.Base64;
import android.util.DisplayMetrics;
import android.view.View;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
@ -59,22 +47,15 @@ import org.jsoup.safety.Whitelist;
import org.jsoup.select.NodeTraversor;
import org.jsoup.select.NodeVisitor;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
@ -93,9 +74,6 @@ public class HtmlHelper {
private static final List<String> tails = Collections.unmodifiableList(Arrays.asList(
"h1", "h2", "h3", "h4", "h5", "h6", "p", "ol", "ul", "li"));
private static final ExecutorService executor =
Executors.newSingleThreadExecutor(Helper.backgroundThreadFactory);
static String sanitize(Context context, String html, boolean show_images) {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
boolean text_color = prefs.getBoolean("text_color", true);
@ -387,7 +365,7 @@ public class HtmlHelper {
if (width != 0 || height != 0) {
String src = img.attr("src");
AnnotatedSource a = new AnnotatedSource(src, width, height);
ImageHelper.AnnotatedSource a = new ImageHelper.AnnotatedSource(src, width, height);
img.attr("src", a.getAnnotated());
}
}
@ -521,299 +499,64 @@ public class HtmlHelper {
}
}
static Drawable decodeImage(final Context context, final long id, String source, boolean show, final TextView view) {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
boolean compact = prefs.getBoolean("compact", false);
int zoom = prefs.getInt("zoom", compact ? 0 : 1);
boolean inline = prefs.getBoolean("inline_images", false);
private static boolean isTrackingPixel(Element img) {
String width = img.attr("width").trim();
String height = img.attr("height").trim();
final int px = Helper.dp2pixels(context, (zoom + 1) * 24);
final Resources.Theme theme = context.getTheme();
final Resources res = context.getResources();
if (TextUtils.isEmpty(width) || TextUtils.isEmpty(height))
return false;
try {
final AnnotatedSource a = new AnnotatedSource(source);
return (Integer.parseInt(width) * Integer.parseInt(height) <= TRACKING_PIXEL_SURFACE);
} catch (NumberFormatException ignored) {
return false;
}
}
if (TextUtils.isEmpty(a.source)) {
Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
d.setBounds(0, 0, px, px);
return d;
}
boolean embedded = a.source.startsWith("cid:");
boolean data = a.source.startsWith("data:");
if (BuildConfig.DEBUG)
Log.i("Image show=" + show + " inline=" + inline +
" embedded=" + embedded + " data=" + data + " source=" + a.source);
// Embedded images
if (embedded && (show || inline)) {
DB db = DB.getInstance(context);
String cid = "<" + a.source.substring(4) + ">";
static void embedImages(Context context, long id, Document document) throws IOException {
DB db = DB.getInstance(context);
for (Element img : document.select("img")) {
String src = img.attr("src");
if (src.startsWith("cid:")) {
String cid = '<' + src.substring(4) + '>';
EntityAttachment attachment = db.attachment().getAttachment(id, cid);
if (attachment == null) {
Log.i("Image not found CID=" + cid);
Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
d.setBounds(0, 0, px, px);
return d;
} else if (!attachment.available) {
Log.i("Image not available CID=" + cid);
Drawable d = res.getDrawable(R.drawable.baseline_hourglass_empty_24, theme);
d.setBounds(0, 0, px, px);
return d;
} else {
int scaleToPixels = res.getDisplayMetrics().widthPixels;
if ("image/gif".equals(attachment.type) &&
Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
ImageDecoder.Source isource = ImageDecoder.createSource(attachment.getFile(context));
Drawable gif;
try {
gif = ImageDecoder.decodeDrawable(isource, new ImageDecoder.OnHeaderDecodedListener() {
@Override
public void onHeaderDecoded(
@NonNull ImageDecoder decoder,
@NonNull ImageDecoder.ImageInfo info,
@NonNull ImageDecoder.Source source) {
int factor = 1;
while (info.getSize().getWidth() / factor > scaleToPixels)
factor *= 2;
if (attachment != null && attachment.available) {
File file = attachment.getFile(context);
try (InputStream is = new FileInputStream(file)) {
byte[] bytes = new byte[(int) file.length()];
if (is.read(bytes) != bytes.length)
throw new IOException("length");
decoder.setTargetSampleSize(factor);
}
});
} catch (IOException ex) {
Log.w(ex);
gif = null;
}
if (gif == null) {
Log.i("GIF not decodable CID=" + cid);
Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
d.setBounds(0, 0, px, px);
return d;
} else {
if (view != null)
fitDrawable(gif, a, view);
return gif;
}
} else {
Bitmap bm = Helper.decodeImage(attachment.getFile(context), scaleToPixels);
if (bm == null) {
Log.i("Image not decodable CID=" + cid);
Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
d.setBounds(0, 0, px, px);
return d;
} else {
Drawable d = new BitmapDrawable(res, bm);
DisplayMetrics dm = context.getResources().getDisplayMetrics();
d.setBounds(0, 0, Math.round(bm.getWidth() * dm.density), Math.round(bm.getHeight() * dm.density));
if (view != null)
fitDrawable(d, a, view);
return d;
}
StringBuilder sb = new StringBuilder();
sb.append("data:");
sb.append(attachment.type);
sb.append(";base64,");
sb.append(Base64.encodeToString(bytes, Base64.DEFAULT));
img.attr("src", sb.toString());
}
}
}
}
}
// Data URI
if (data && (show || inline))
try {
Drawable d = getDataDrawable(context, a.source);
if (view != null)
fitDrawable(d, a, view);
return d;
} catch (IllegalArgumentException ex) {
Log.w(ex);
Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
d.setBounds(0, 0, px, px);
return d;
}
static void removeViewportLimitations(Document document) {
for (Element meta : document.select("meta").select("[name=viewport]")) {
String content = meta.attr("content");
String[] params = content.split(";");
if (params.length > 0) {
List<String> viewport = new ArrayList<>();
for (String param : params)
if (!param.toLowerCase(Locale.ROOT).contains("maximum-scale") &&
!param.toLowerCase(Locale.ROOT).contains("user-scalable"))
viewport.add(param.trim());
if (!show) {
// Show placeholder icon
int resid = (embedded || data ? R.drawable.baseline_photo_library_24 : R.drawable.baseline_image_24);
Drawable d = res.getDrawable(resid, theme);
d.setBounds(0, 0, px, px);
return d;
}
// Get cache file name
File dir = new File(context.getCacheDir(), "images");
if (!dir.exists())
dir.mkdir();
final File file = new File(dir, id + "_" + Math.abs(a.source.hashCode()) + ".png");
Drawable cached = getCachedImage(context, file);
if (cached != null || view == null) {
if (view == null)
if (cached == null) {
Drawable d = res.getDrawable(R.drawable.baseline_hourglass_empty_24, theme);
d.setBounds(0, 0, px, px);
return d;
} else
return cached;
if (viewport.size() == 0)
meta.attr("content", "");
else
fitDrawable(cached, a, view);
return cached;
}
final LevelListDrawable lld = new LevelListDrawable();
Drawable wait = res.getDrawable(R.drawable.baseline_hourglass_empty_24, theme);
lld.addLevel(1, 1, wait);
lld.setBounds(0, 0, px, px);
lld.setLevel(1);
executor.submit(new Runnable() {
@Override
public void run() {
try {
Drawable cached = getCachedImage(context, file);
if (cached != null) {
fitDrawable(cached, a, view);
post(cached, a.source);
return;
}
BitmapFactory.Options options = new BitmapFactory.Options();
Log.i("Probe " + a.source);
try (InputStream probe = new URL(a.source).openStream()) {
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(probe, null, options);
}
Log.i("Download " + a.source);
Bitmap bm;
try (InputStream is = new URL(a.source).openStream()) {
int scaleTo = res.getDisplayMetrics().widthPixels;
int factor = 1;
while (options.outWidth / factor > scaleTo)
factor *= 2;
if (factor > 1) {
Log.i("Download image factor=" + factor);
options.inJustDecodeBounds = false;
options.inSampleSize = factor;
bm = BitmapFactory.decodeStream(is, null, options);
} else
bm = BitmapFactory.decodeStream(is);
}
if (bm == null)
throw new FileNotFoundException("Download image failed source=" + a.source);
Log.i("Downloaded image source=" + a.source);
try (OutputStream os = new BufferedOutputStream(new FileOutputStream(file))) {
bm.compress(Bitmap.CompressFormat.PNG, 90, os);
}
// Create drawable from bitmap
Drawable d = new BitmapDrawable(res, bm);
DisplayMetrics dm = context.getResources().getDisplayMetrics();
d.setBounds(0, 0, Math.round(bm.getWidth() * dm.density), Math.round(bm.getHeight() * dm.density));
fitDrawable(d, a, view);
post(d, a.source);
} catch (Throwable ex) {
// Show broken icon
Log.w(ex);
int resid = (ex instanceof IOException && !(ex instanceof FileNotFoundException)
? R.drawable.baseline_cloud_off_24
: R.drawable.baseline_broken_image_24);
Drawable d = res.getDrawable(resid, theme);
d.setBounds(0, 0, px, px);
post(d, a.source);
}
}
private void post(final Drawable d, String source) {
Log.i("Posting image=" + source);
new Handler(context.getMainLooper()).post(new Runnable() {
@Override
public void run() {
Rect bounds = d.getBounds();
lld.addLevel(0, 0, d);
lld.setBounds(0, 0, bounds.width(), bounds.height());
lld.setLevel(0);
view.setText(view.getText());
}
});
}
});
return lld;
} catch (Throwable ex) {
Log.e(ex);
Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
d.setBounds(0, 0, px, px);
return d;
}
}
private static void fitDrawable(Drawable d, AnnotatedSource a, View view) {
Rect bounds = d.getBounds();
int w = bounds.width();
int h = bounds.height();
if (a.width == 0 && a.height != 0)
a.width = Math.round(a.height * w / (float) h);
if (a.height == 0 && a.width != 0)
a.height = Math.round(a.width * h / (float) w);
if (a.width != 0 && a.height != 0) {
w = Helper.dp2pixels(view.getContext(), a.width);
h = Helper.dp2pixels(view.getContext(), a.height);
d.setBounds(0, 0, w, h);
}
float width = view.getWidth();
if (w > width) {
float scale = width / w;
w = Math.round(w * scale);
h = Math.round(h * scale);
d.setBounds(0, 0, w, h);
}
}
private static Drawable getDataDrawable(Context context, String source) {
// "<img src=\"data:image/png;base64,iVBORw0KGgoAAA" +
// "ANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4" +
// "//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU" +
// "5ErkJggg==\" alt=\"Red dot\" />";
String base64 = source.substring(source.indexOf(',') + 1);
byte[] bytes = Base64.decode(base64.getBytes(), 0);
Bitmap bm = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
if (bm == null)
throw new IllegalArgumentException("decode byte array failed");
Drawable d = new BitmapDrawable(context.getResources(), bm);
DisplayMetrics dm = context.getResources().getDisplayMetrics();
d.setBounds(0, 0, Math.round(bm.getWidth() * dm.density), Math.round(bm.getHeight() * dm.density));
return d;
}
private static Drawable getCachedImage(Context context, File file) {
if (file.exists()) {
Log.i("Using cached " + file);
Bitmap bm = BitmapFactory.decodeFile(file.getAbsolutePath());
if (bm != null) {
Drawable d = new BitmapDrawable(context.getResources(), bm);
DisplayMetrics dm = context.getResources().getDisplayMetrics();
d.setBounds(0, 0, Math.round(bm.getWidth() * dm.density), Math.round(bm.getHeight() * dm.density));
return d;
meta.attr("content", TextUtils.join(" ;", viewport) + ";");
}
}
return null;
}
static String getPreview(String body) {
@ -909,66 +652,6 @@ public class HtmlHelper {
return sb.toString();
}
static void embedImages(Context context, long id, Document document) throws IOException {
DB db = DB.getInstance(context);
for (Element img : document.select("img")) {
String src = img.attr("src");
if (src.startsWith("cid:")) {
String cid = '<' + src.substring(4) + '>';
EntityAttachment attachment = db.attachment().getAttachment(id, cid);
if (attachment != null && attachment.available) {
File file = attachment.getFile(context);
try (InputStream is = new FileInputStream(file)) {
byte[] bytes = new byte[(int) file.length()];
if (is.read(bytes) != bytes.length)
throw new IOException("length");
StringBuilder sb = new StringBuilder();
sb.append("data:");
sb.append(attachment.type);
sb.append(";base64,");
sb.append(Base64.encodeToString(bytes, Base64.DEFAULT));
img.attr("src", sb.toString());
}
}
}
}
}
static void removeViewportLimitations(Document document) {
for (Element meta : document.select("meta").select("[name=viewport]")) {
String content = meta.attr("content");
String[] params = content.split(";");
if (params.length > 0) {
List<String> viewport = new ArrayList<>();
for (String param : params)
if (!param.toLowerCase(Locale.ROOT).contains("maximum-scale") &&
!param.toLowerCase(Locale.ROOT).contains("user-scalable"))
viewport.add(param.trim());
if (viewport.size() == 0)
meta.attr("content", "");
else
meta.attr("content", TextUtils.join(" ;", viewport) + ";");
}
}
}
private static boolean isTrackingPixel(Element img) {
String width = img.attr("width").trim();
String height = img.attr("height").trim();
if (TextUtils.isEmpty(width) || TextUtils.isEmpty(height))
return false;
try {
return (Integer.parseInt(width) * Integer.parseInt(height) <= TRACKING_PIXEL_SURFACE);
} catch (NumberFormatException ignored) {
return false;
}
}
static Spanned highlightHeaders(Context context, String headers) {
int colorAccent = Helper.resolveColor(context, R.attr.colorAccent);
SpannableStringBuilder ssb = new SpannableStringBuilder(headers);
@ -1024,49 +707,4 @@ public class HtmlHelper {
return doc.html();
}
public static class AnnotatedSource {
private String source;
private int width = 0;
private int height = 0;
// Encapsulate some ugliness
AnnotatedSource(String source) {
this.source = source;
if (source != null && source.endsWith("###")) {
int pos = source.substring(0, source.length() - 3).lastIndexOf("###");
if (pos > 0) {
int x = source.indexOf("x", pos + 3);
if (x > 0)
try {
this.width = Integer.parseInt(source.substring(pos + 3, x));
this.height = Integer.parseInt(source.substring(x + 1, source.length() - 3));
this.source = source.substring(0, pos);
} catch (NumberFormatException ex) {
Log.e(ex);
this.width = 0;
this.height = 0;
}
}
}
}
private AnnotatedSource(String source, int width, int height) {
this.source = source;
this.width = width;
this.height = height;
}
public String getSource() {
return this.source;
}
private String getAnnotated() {
return (width == 0 && height == 0
? source
: source + "###" + width + "x" + height + "###");
}
}
}

109
app/src/main/java/eu/faircode/email/IconHelper.java
View File

@ -1,109 +0,0 @@
package eu.faircode.email;
/*
This file is part of FairEmail.
FairEmail 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.
FairEmail 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 FairEmail. If not, see <http://www.gnu.org/licenses/>.
Copyright 2018-2019 by Marcel Bokhorst (M66B)
*/
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Typeface;
import androidx.annotation.NonNull;
import androidx.core.graphics.ColorUtils;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
class IconHelper {
private static final float MIN_LUMINANCE = 0.33f;
static Bitmap generateIdenticon(@NonNull String email, int size, int pixels, boolean dark) {
byte[] hash = getHash(email);
int color = Color.argb(255, hash[0], hash[1], hash[2]);
color = Helper.adjustLuminance(color, dark, MIN_LUMINANCE);
Paint paint = new Paint();
paint.setColor(color);
Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawColor(Color.TRANSPARENT);
float psize = (float) size / pixels;
for (int x = 0; x < pixels; x++) {
int i = (x > pixels / 2 ? pixels - x - 1 : x);
for (int y = 0; y < pixels; y++) {
if ((hash[i] >> y & 1) == 1) {
RectF rect = new RectF(x * psize, y * psize, (x + 1) * psize, (y + 1) * psize);
canvas.drawRect(rect, paint);
}
}
}
return bitmap;
}
static Bitmap generateLetterIcon(@NonNull String email, int size, boolean dark) {
String text = null;
for (int i = 0; i < email.length(); i++) {
char kar = email.charAt(i);
if (Character.isAlphabetic(kar)) {
text = email.substring(i, i + 1).toUpperCase();
break;
}
}
if (text == null)
return null;
byte[] hash = getHash(email);
int color = Color.argb(255, hash[0], hash[1], hash[2]);
color = Helper.adjustLuminance(color, dark, MIN_LUMINANCE);
Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawColor(color);
double lum = ColorUtils.calculateLuminance(color);
Paint paint = new Paint();
paint.setColor(lum < 0.5 ? Color.WHITE : Color.BLACK);
paint.setTextSize(size / 2f);
paint.setTypeface(Typeface.DEFAULT_BOLD);
canvas.drawText(
text,
size / 2f - paint.measureText(text) / 2,
size / 2f - (paint.descent() + paint.ascent()) / 2, paint);
return bitmap;
}
private static byte[] getHash(String email) {
try {
return MessageDigest.getInstance("MD5").digest(email.getBytes());
} catch (NoSuchAlgorithmException ignored) {
return email.getBytes();
}
}
}

479
app/src/main/java/eu/faircode/email/ImageHelper.java Normal file
View File

@ -0,0 +1,479 @@
package eu.faircode.email;
/*
This file is part of FairEmail.
FairEmail 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.
FairEmail 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 FairEmail. If not, see <http://www.gnu.org/licenses/>.
Copyright 2018-2019 by Marcel Bokhorst (M66B)
*/
import android.content.Context;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ImageDecoder;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Typeface;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LevelListDrawable;
import android.os.Build;
import android.os.Handler;
import android.text.TextUtils;
import android.util.Base64;
import android.util.DisplayMetrics;
import android.view.View;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.core.graphics.ColorUtils;
import androidx.preference.PreferenceManager;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
class ImageHelper {
private static final float MIN_LUMINANCE = 0.33f;
private static final ExecutorService executor =
Executors.newSingleThreadExecutor(Helper.backgroundThreadFactory);
static Bitmap generateIdenticon(@NonNull String email, int size, int pixels, boolean dark) {
byte[] hash = getHash(email);
int color = Color.argb(255, hash[0], hash[1], hash[2]);
color = Helper.adjustLuminance(color, dark, MIN_LUMINANCE);
Paint paint = new Paint();
paint.setColor(color);
Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawColor(Color.TRANSPARENT);
float psize = (float) size / pixels;
for (int x = 0; x < pixels; x++) {
int i = (x > pixels / 2 ? pixels - x - 1 : x);
for (int y = 0; y < pixels; y++) {
if ((hash[i] >> y & 1) == 1) {
RectF rect = new RectF(x * psize, y * psize, (x + 1) * psize, (y + 1) * psize);
canvas.drawRect(rect, paint);
}
}
}
return bitmap;
}
static Bitmap generateLetterIcon(@NonNull String email, int size, boolean dark) {
String text = null;
for (int i = 0; i < email.length(); i++) {
char kar = email.charAt(i);
if (Character.isAlphabetic(kar)) {
text = email.substring(i, i + 1).toUpperCase();
break;
}
}
if (text == null)
return null;
byte[] hash = getHash(email);
int color = Color.argb(255, hash[0], hash[1], hash[2]);
color = Helper.adjustLuminance(color, dark, MIN_LUMINANCE);
Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawColor(color);
double lum = ColorUtils.calculateLuminance(color);
Paint paint = new Paint();
paint.setColor(lum < 0.5 ? Color.WHITE : Color.BLACK);
paint.setTextSize(size / 2f);
paint.setTypeface(Typeface.DEFAULT_BOLD);
canvas.drawText(
text,
size / 2f - paint.measureText(text) / 2,
size / 2f - (paint.descent() + paint.ascent()) / 2, paint);
return bitmap;
}
private static byte[] getHash(String email) {
try {
return MessageDigest.getInstance("MD5").digest(email.getBytes());
} catch (NoSuchAlgorithmException ignored) {
return email.getBytes();
}
}
static Drawable decodeImage(final Context context, final long id, String source, boolean show, final TextView view) {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
boolean compact = prefs.getBoolean("compact", false);
int zoom = prefs.getInt("zoom", compact ? 0 : 1);
boolean inline = prefs.getBoolean("inline_images", false);
final int px = Helper.dp2pixels(context, (zoom + 1) * 24);
final Resources.Theme theme = context.getTheme();
final Resources res = context.getResources();
try {
final AnnotatedSource a = new AnnotatedSource(source);
if (TextUtils.isEmpty(a.source)) {
Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
d.setBounds(0, 0, px, px);
return d;
}
boolean embedded = a.source.startsWith("cid:");
boolean data = a.source.startsWith("data:");
if (BuildConfig.DEBUG)
Log.i("Image show=" + show + " inline=" + inline +
" embedded=" + embedded + " data=" + data + " source=" + a.source);
// Embedded images
if (embedded && (show || inline)) {
DB db = DB.getInstance(context);
String cid = "<" + a.source.substring(4) + ">";
EntityAttachment attachment = db.attachment().getAttachment(id, cid);
if (attachment == null) {
Log.i("Image not found CID=" + cid);
Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
d.setBounds(0, 0, px, px);
return d;
} else if (!attachment.available) {
Log.i("Image not available CID=" + cid);
Drawable d = res.getDrawable(R.drawable.baseline_hourglass_empty_24, theme);
d.setBounds(0, 0, px, px);
return d;
} else {
int scaleToPixels = res.getDisplayMetrics().widthPixels;
if ("image/gif".equals(attachment.type) &&
Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
ImageDecoder.Source isource = ImageDecoder.createSource(attachment.getFile(context));
Drawable gif;
try {
gif = ImageDecoder.decodeDrawable(isource, new ImageDecoder.OnHeaderDecodedListener() {
@Override
public void onHeaderDecoded(
@NonNull ImageDecoder decoder,
@NonNull ImageDecoder.ImageInfo info,
@NonNull ImageDecoder.Source source) {
int factor = 1;
while (info.getSize().getWidth() / factor > scaleToPixels)
factor *= 2;
decoder.setTargetSampleSize(factor);
}
});
} catch (IOException ex) {
Log.w(ex);
gif = null;
}
if (gif == null) {
Log.i("GIF not decodable CID=" + cid);
Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
d.setBounds(0, 0, px, px);
return d;
} else {
if (view != null)
fitDrawable(gif, a, view);
return gif;
}
} else {
Bitmap bm = Helper.decodeImage(attachment.getFile(context), scaleToPixels);
if (bm == null) {
Log.i("Image not decodable CID=" + cid);
Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
d.setBounds(0, 0, px, px);
return d;
} else {
Drawable d = new BitmapDrawable(res, bm);
DisplayMetrics dm = context.getResources().getDisplayMetrics();
d.setBounds(0, 0, Math.round(bm.getWidth() * dm.density), Math.round(bm.getHeight() * dm.density));
if (view != null)
fitDrawable(d, a, view);
return d;
}
}
}
}
// Data URI
if (data && (show || inline))
try {
Drawable d = getDataDrawable(context, a.source);
if (view != null)
fitDrawable(d, a, view);
return d;
} catch (IllegalArgumentException ex) {
Log.w(ex);
Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
d.setBounds(0, 0, px, px);
return d;
}
if (!show) {
// Show placeholder icon
int resid = (embedded || data ? R.drawable.baseline_photo_library_24 : R.drawable.baseline_image_24);
Drawable d = res.getDrawable(resid, theme);
d.setBounds(0, 0, px, px);
return d;
}
// Get cache file name
File dir = new File(context.getCacheDir(), "images");
if (!dir.exists())
dir.mkdir();
final File file = new File(dir, id + "_" + Math.abs(a.source.hashCode()) + ".png");
Drawable cached = getCachedImage(context, file);
if (cached != null || view == null) {
if (view == null)
if (cached == null) {
Drawable d = res.getDrawable(R.drawable.baseline_hourglass_empty_24, theme);
d.setBounds(0, 0, px, px);
return d;
} else
return cached;
else
fitDrawable(cached, a, view);
return cached;
}
final LevelListDrawable lld = new LevelListDrawable();
Drawable wait = res.getDrawable(R.drawable.baseline_hourglass_empty_24, theme);
lld.addLevel(1, 1, wait);
lld.setBounds(0, 0, px, px);
lld.setLevel(1);
executor.submit(new Runnable() {
@Override
public void run() {
try {
Drawable cached = getCachedImage(context, file);
if (cached != null) {
fitDrawable(cached, a, view);
post(cached, a.source);
return;
}
BitmapFactory.Options options = new BitmapFactory.Options();
Log.i("Probe " + a.source);
try (InputStream probe = new URL(a.source).openStream()) {
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(probe, null, options);
}
Log.i("Download " + a.source);
Bitmap bm;
try (InputStream is = new URL(a.source).openStream()) {
int scaleTo = res.getDisplayMetrics().widthPixels;
int factor = 1;
while (options.outWidth / factor > scaleTo)
factor *= 2;
if (factor > 1) {
Log.i("Download image factor=" + factor);
options.inJustDecodeBounds = false;
options.inSampleSize = factor;
bm = BitmapFactory.decodeStream(is, null, options);
} else
bm = BitmapFactory.decodeStream(is);
}
if (bm == null)
throw new FileNotFoundException("Download image failed source=" + a.source);
Log.i("Downloaded image source=" + a.source);
try (OutputStream os = new BufferedOutputStream(new FileOutputStream(file))) {
bm.compress(Bitmap.CompressFormat.PNG, 90, os);
}
// Create drawable from bitmap
Drawable d = new BitmapDrawable(res, bm);
DisplayMetrics dm = context.getResources().getDisplayMetrics();
d.setBounds(0, 0, Math.round(bm.getWidth() * dm.density), Math.round(bm.getHeight() * dm.density));
fitDrawable(d, a, view);
post(d, a.source);
} catch (Throwable ex) {
// Show broken icon
Log.w(ex);
int resid = (ex instanceof IOException && !(ex instanceof FileNotFoundException)
? R.drawable.baseline_cloud_off_24
: R.drawable.baseline_broken_image_24);
Drawable d = res.getDrawable(resid, theme);
d.setBounds(0, 0, px, px);
post(d, a.source);
}
}
private void post(final Drawable d, String source) {
Log.i("Posting image=" + source);
new Handler(context.getMainLooper()).post(new Runnable() {
@Override
public void run() {
Rect bounds = d.getBounds();
lld.addLevel(0, 0, d);
lld.setBounds(0, 0, bounds.width(), bounds.height());
lld.setLevel(0);
view.setText(view.getText());
}
});
}
});
return lld;
} catch (Throwable ex) {
Log.e(ex);
Drawable d = res.getDrawable(R.drawable.baseline_broken_image_24, theme);
d.setBounds(0, 0, px, px);
return d;
}
}
private static void fitDrawable(Drawable d, AnnotatedSource a, View view) {
Rect bounds = d.getBounds();
int w = bounds.width();
int h = bounds.height();
if (a.width == 0 && a.height != 0)
a.width = Math.round(a.height * w / (float) h);
if (a.height == 0 && a.width != 0)
a.height = Math.round(a.width * h / (float) w);
if (a.width != 0 && a.height != 0) {
w = Helper.dp2pixels(view.getContext(), a.width);
h = Helper.dp2pixels(view.getContext(), a.height);
d.setBounds(0, 0, w, h);
}
float width = view.getWidth();
if (w > width) {
float scale = width / w;
w = Math.round(w * scale);
h = Math.round(h * scale);
d.setBounds(0, 0, w, h);
}
}
private static Drawable getDataDrawable(Context context, String source) {
// "<img src=\"data:image/png;base64,iVBORw0KGgoAAA" +
// "ANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4" +
// "//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU" +
// "5ErkJggg==\" alt=\"Red dot\" />";
String base64 = source.substring(source.indexOf(',') + 1);
byte[] bytes = Base64.decode(base64.getBytes(), 0);
Bitmap bm = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
if (bm == null)
throw new IllegalArgumentException("decode byte array failed");
Drawable d = new BitmapDrawable(context.getResources(), bm);
DisplayMetrics dm = context.getResources().getDisplayMetrics();
d.setBounds(0, 0, Math.round(bm.getWidth() * dm.density), Math.round(bm.getHeight() * dm.density));
return d;
}
private static Drawable getCachedImage(Context context, File file) {
if (file.exists()) {
Log.i("Using cached " + file);
Bitmap bm = BitmapFactory.decodeFile(file.getAbsolutePath());
if (bm != null) {
Drawable d = new BitmapDrawable(context.getResources(), bm);
DisplayMetrics dm = context.getResources().getDisplayMetrics();
d.setBounds(0, 0, Math.round(bm.getWidth() * dm.density), Math.round(bm.getHeight() * dm.density));
return d;
}
}
return null;
}
static class AnnotatedSource {
private String source;
private int width = 0;
private int height = 0;
// Encapsulate some ugliness
AnnotatedSource(String source) {
this.source = source;
if (source != null && source.endsWith("###")) {
int pos = source.substring(0, source.length() - 3).lastIndexOf("###");
if (pos > 0) {
int x = source.indexOf("x", pos + 3);
if (x > 0)
try {
this.width = Integer.parseInt(source.substring(pos + 3, x));
this.height = Integer.parseInt(source.substring(x + 1, source.length() - 3));
this.source = source.substring(0, pos);
} catch (NumberFormatException ex) {
Log.e(ex);
this.width = 0;
this.height = 0;
}
}
}
}
AnnotatedSource(String source, int width, int height) {
this.source = source;
this.width = width;
this.height = height;
}
public String getSource() {
return this.source;
}
String getAnnotated() {
return (width == 0 && height == 0
? source
: source + "###" + width + "x" + height + "###");
}
}
}