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Code Issues Packages Projects Releases Wiki Activity

Show tracking pixel icon

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This commit is contained in:
M66B
2019-10-04 23:04:03 +02:00
parent c7dee255f4
commit f8c2a00557
8 changed files with 121 additions and 47 deletions
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33
app/src/main/java/eu/faircode/email/HtmlHelper.java
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@@ -21,7 +21,10 @@ package eu.faircode.email;
import android.content.Context;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Build;
import android.text.Html;
@@ -33,6 +36,7 @@ import android.util.Base64;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.content.ContextCompat;
import androidx.core.text.HtmlCompat;
import androidx.core.util.PatternsCompat;
import androidx.preference.PreferenceManager;
@@ -47,6 +51,7 @@ import org.jsoup.safety.Whitelist;
import org.jsoup.select.NodeTraversor;
import org.jsoup.select.NodeVisitor;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
@@ -470,6 +475,24 @@ public class HtmlHelper {
}
static void removeTrackingPixels(Context context, Document document) {
Drawable d = ContextCompat.getDrawable(context, R.drawable.baseline_my_location_24);
d.setTint(Helper.resolveColor(context, R.attr.colorWarning));
Bitmap bm = Bitmap.createBitmap(d.getIntrinsicWidth(), d.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(bm);
d.setBounds(0, 0, c.getWidth(), c.getHeight());
d.draw(c);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100, bos);
StringBuilder sb = new StringBuilder();
sb.append("data:");
sb.append("image/png");
sb.append(";base64,");
sb.append(Base64.encodeToString(bos.toByteArray(), Base64.DEFAULT));
boolean dark = Helper.isDarkTheme(context);
// Build list of allowed hosts
List<String> hosts = new ArrayList<>();
for (Element img : document.select("img")) {
@@ -489,11 +512,11 @@ public class HtmlHelper {
Uri uri = Uri.parse(img.attr("src"));
String host = uri.getHost();
if (host == null || !hosts.contains(host)) {
img.removeAttr("src");
img.tagName("a");
img.attr("href", src);
img.appendText(context.getString(R.string.title_hint_tracking_image,
img.attr("width"), img.attr("height")));
img.attr("src", sb.toString());
img.attr("alt", context.getString(R.string.title_legend_tracking_pixel));
img.attr("height", "24");
img.attr("width", "24");
img.attr("style", "display: block !important;");
}
}
}