Added barcode decoding

ATTRIBUTION.md

@@ -54,3 +54,4 @@ FairEmail uses parts or all of:
 * [Brave Lists](https://github.com/brave/adblock-lists). [Mozilla Public License Version 2.0](https://github.com/brave/adblock-lists/blob/master/LICENSE).
 * [AG Filters Registry](https://github.com/AdguardTeam/FiltersRegistry). [GNU Lesser General Public License Version 3](https://github.com/AdguardTeam/FiltersRegistry/blob/master/LICENSE).
 * [Certificate transparency for Android and JVM](https://github.com/appmattus/certificatetransparency). Copyright 2023 Appmattus Limited. [Apache License 2.0](https://github.com/appmattus/certificatetransparency/blob/main/LICENSE.md).
+* [ZXing](https://github.com/zxing/zxing). Copyright (C) 2014 ZXing authors. [Apache License 2.0](https://github.com/zxing/zxing/blob/master/LICENSE).

app/build.gradle

@@ -572,6 +572,7 @@ dependencies {
     def canary_version = "2.13"
     def ws_version = "2.14"
     def tinylog_version = "2.6.2"
+    def zxing_version = "3.5.3"
 
     // https://mvnrepository.com/artifact/com.android.tools/desugar_jdk_libs?repo=google
     coreLibraryDesugaring "com.android.tools:desugar_jdk_libs:$desugar_version"
@@ -828,4 +829,8 @@ dependencies {
     // https://mvnrepository.com/artifact/org.tinylog
     implementation "org.tinylog:tinylog-api:$tinylog_version"
     implementation "org.tinylog:tinylog-impl:$tinylog_version"
+
+    // https://github.com/zxing/zxing
+    // https://mvnrepository.com/artifact/com.google.zxing/core
+    implementation "com.google.zxing:core:$zxing_version"
 }

app/src/main/assets/ATTRIBUTION.md

@@ -54,3 +54,4 @@ FairEmail uses parts or all of:
 * [Brave Lists](https://github.com/brave/adblock-lists). [Mozilla Public License Version 2.0](https://github.com/brave/adblock-lists/blob/master/LICENSE).
 * [AG Filters Registry](https://github.com/AdguardTeam/FiltersRegistry). [GNU Lesser General Public License Version 3](https://github.com/AdguardTeam/FiltersRegistry/blob/master/LICENSE).
 * [Certificate transparency for Android and JVM](https://github.com/appmattus/certificatetransparency). Copyright 2023 Appmattus Limited. [Apache License 2.0](https://github.com/appmattus/certificatetransparency/blob/main/LICENSE.md).
+* [ZXing](https://github.com/zxing/zxing). Copyright (C) 2014 ZXing authors. [Apache License 2.0](https://github.com/zxing/zxing/blob/master/LICENSE).

app/src/main/java/eu/faircode/email/AdapterMedia.java

@@ -25,6 +25,7 @@ import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.Canvas;
 import android.graphics.Color;
+import android.graphics.Typeface;
 import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
 import android.graphics.pdf.PdfRenderer;
@@ -35,7 +36,10 @@ import android.os.Build;
 import android.os.Bundle;
 import android.os.ParcelFileDescriptor;
 import android.provider.MediaStore;
+import android.text.SpannableStringBuilder;
 import android.text.TextUtils;
+import android.text.style.StyleSpan;
+import android.text.style.URLSpan;
 import android.util.Pair;
 import android.util.Size;
 import android.view.LayoutInflater;
@@ -45,6 +49,7 @@ import android.widget.ImageView;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
+import androidx.core.text.method.LinkMovementMethodCompat;
 import androidx.fragment.app.Fragment;
 import androidx.lifecycle.Lifecycle;
 import androidx.lifecycle.LifecycleObserver;
@@ -55,7 +60,16 @@ import androidx.recyclerview.widget.DiffUtil;
 import androidx.recyclerview.widget.ListUpdateCallback;
 import androidx.recyclerview.widget.RecyclerView;
 
+import com.google.zxing.BinaryBitmap;
+import com.google.zxing.MultiFormatReader;
+import com.google.zxing.NotFoundException;
+import com.google.zxing.RGBLuminanceSource;
+import com.google.zxing.Result;
+import com.google.zxing.common.HybridBinarizer;
+
 import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
@@ -84,6 +98,7 @@ public class AdapterMedia extends RecyclerView.Adapter<AdapterMedia.ViewHolder>
             ivImage = itemView.findViewById(R.id.ivImage);
             tvCaption = itemView.findViewById(R.id.tvCaption);
             tvProperties = itemView.findViewById(R.id.tvProperties);
+            tvProperties.setMovementMethod(LinkMovementMethodCompat.getInstance());
         }
 
         private void wire() {
@@ -180,6 +195,7 @@ public class AdapterMedia extends RecyclerView.Adapter<AdapterMedia.ViewHolder>
                         } else {
                             SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
                             boolean webp = prefs.getBoolean("webp", true);
+                            boolean barcode_preview = prefs.getBoolean("barcode_preview", true);
 
                             if ("image/webp".equalsIgnoreCase(type) && !webp)
                                 return context.getDrawable(R.drawable.twotone_image_not_supported_24);
@@ -200,6 +216,24 @@ public class AdapterMedia extends RecyclerView.Adapter<AdapterMedia.ViewHolder>
                                 Log.w(ex);
                             }
 
+                            if (barcode_preview)
+                                try (InputStream is = new FileInputStream(file)) {
+                                    Bitmap bitmap = BitmapFactory.decodeStream(is);
+                                    int width = bitmap.getWidth(), height = bitmap.getHeight();
+                                    int[] pixels = new int[width * height];
+                                    bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
+
+                                    RGBLuminanceSource source = new RGBLuminanceSource(width, height, pixels);
+                                    BinaryBitmap bBitmap = new BinaryBitmap(new HybridBinarizer(source));
+                                    MultiFormatReader reader = new MultiFormatReader();
+                                    Result result = reader.decode(bBitmap);
+                                    args.putString("barcode", result.getText());
+                                } catch (NotFoundException ex) {
+                                    Log.w(ex);
+                                } catch (Throwable ex) {
+                                    Log.e(ex);
+                                }
+
                             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P &&
                                     !"image/svg+xml".equals(type) &&
                                     !"svg".equals(Helper.getExtension(file.getName())))
@@ -233,47 +267,65 @@ public class AdapterMedia extends RecyclerView.Adapter<AdapterMedia.ViewHolder>
                             ImageHelper.animate(context, image);
                         }
 
-                        StringBuilder sb = new StringBuilder();
+                        SpannableStringBuilder ssb = new SpannableStringBuilderEx();
 
                         int width = args.getInt("width");
                         int height = args.getInt("height");
                         if (width > 0 && height > 0)
-                            sb.append(width)
+                            ssb.append(Integer.toString(width))
                                     .append("\u00d7") // ×
-                                    .append(height);
+                                    .append(Integer.toString(height));
 
                         if (BuildConfig.DEBUG) {
                             String color = args.getString("color");
                             if (color != null) {
-                                if (sb.length() > 0)
+                                if (ssb.length() > 0)
-                                    sb.append(' ');
+                                    ssb.append(' ');
-                                sb.append(color);
+                                ssb.append(color);
                             }
 
                             String config = args.getString("config");
                             if (config != null) {
-                                if (sb.length() > 0)
+                                if (ssb.length() > 0)
-                                    sb.append(' ');
+                                    ssb.append(' ');
-                                sb.append(config);
+                                ssb.append(config);
                             }
                         }
 
                         long size = args.getLong("size");
                         if (size > 0) {
-                            if (sb.length() > 0)
+                            if (ssb.length() > 0)
-                                sb.append(' ');
+                                ssb.append(' ');
-                            sb.append(Helper.humanReadableByteCount(size));
+                            ssb.append(Helper.humanReadableByteCount(size));
                         }
 
                         int duration = args.getInt("duration");
                         if (duration > 0) {
-                            if (sb.length() > 0)
+                            if (ssb.length() > 0)
-                                sb.append(' ');
+                                ssb.append(' ');
-                            sb.append(Helper.formatDuration(duration));
+                            ssb.append(Helper.formatDuration(duration));
+                        }
+
+                        String barcode = args.getString("barcode");
+                        if (!TextUtils.isEmpty(barcode)) {
+                            if (ssb.length() > 0)
+                                ssb.append('\n');
+                            int start = ssb.length();
+                            ssb.append(barcode);
+
+                            try {
+                                Uri uri = UriHelper.guessScheme(Uri.parse(barcode));
+                                if (UriHelper.isHyperLink(uri) || UriHelper.isMail(uri))
+                                    ssb.setSpan(new URLSpan(uri.toString()), start, ssb.length(), 0);
+                                else
+                                    ssb.setSpan(new StyleSpan(Typeface.BOLD), start, ssb.length(), 0);
+                            } catch (Throwable ex) {
+                                Log.e(ex);
+                            }
                         }
 
-                        if (sb.length() > 0) {
+                        if (ssb.length() > 0) {
-                            tvProperties.setText(sb);
+                            tvProperties.setText(ssb);
                             tvProperties.setVisibility(View.VISIBLE);
                         }
                     }

app/src/main/java/eu/faircode/email/FragmentOptions.java

@@ -155,7 +155,7 @@ public class FragmentOptions extends FragmentBase {
             "subject_top", "subject_italic", "highlight_subject", "font_size_subject", "subject_ellipsize",
             "keywords_header", "labels_header", "flags", "flags_background", "preview", "preview_italic", "preview_lines", "align_header",
             "message_zoom", "overview_mode", "addresses", "button_extra", "attachments_alt",
-            "thumbnails", "pdf_preview", "video_preview", "audio_preview",
+            "thumbnails", "pdf_preview", "video_preview", "audio_preview", "barcode_preview",
             "contrast", "hyphenation", "display_font", "monospaced_pre",
             "list_count", "bundled_fonts", "narrow_fonts", "parse_classes",
             "background_color", "text_color", "text_size", "text_font", "text_align", "text_titles", "text_separators",

app/src/main/java/eu/faircode/email/FragmentOptionsDisplay.java

@@ -187,6 +187,7 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
     private SwitchCompat swPdfPreview;
     private SwitchCompat swVideoPreview;
     private SwitchCompat swAudioPreview;
+    private SwitchCompat swBarcodePreview;
 
     private SwitchCompat swListCount;
     private SwitchCompat swBundledFonts;
@@ -226,7 +227,7 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
             "hyphenation", "display_font", "contrast", "monospaced_pre",
             "text_separators",
             "collapse_quotes", "image_placeholders", "inline_images", "button_extra",
-            "unzip", "attachments_alt", "thumbnails", "pdf_preview", "video_preview", "audio_preview",
+            "unzip", "attachments_alt", "thumbnails", "pdf_preview", "video_preview", "audio_preview", "barcode_preview",
             "list_count", "bundled_fonts", "narrow_fonts", "parse_classes",
             "background_color", "text_color", "text_size", "text_font", "text_align", "text_titles",
             "authentication", "authentication_indicator"
@@ -361,6 +362,7 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
         swPdfPreview = view.findViewById(R.id.swPdfPreview);
         swVideoPreview = view.findViewById(R.id.swVideoPreview);
         swAudioPreview = view.findViewById(R.id.swAudioPreview);
+        swBarcodePreview = view.findViewById(R.id.swBarcodePreview);
 
         swListCount = view.findViewById(R.id.swListCount);
         swBundledFonts = view.findViewById(R.id.swBundledFonts);
@@ -1324,6 +1326,7 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
                 swPdfPreview.setEnabled(checked);
                 swVideoPreview.setEnabled(checked);
                 swAudioPreview.setEnabled(checked);
+                swBarcodePreview.setEnabled(checked);
             }
         });
 
@@ -1348,6 +1351,13 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
             }
         });
 
+        swBarcodePreview.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
+                prefs.edit().putBoolean("barcode_preview", checked).apply();
+            }
+        });
+
         swListCount.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
@@ -1695,6 +1705,8 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
             swVideoPreview.setEnabled(swThumbnails.isChecked());
             swAudioPreview.setChecked(prefs.getBoolean("audio_preview", true));
             swAudioPreview.setEnabled(swThumbnails.isChecked());
+            swBarcodePreview.setChecked(prefs.getBoolean("barcode_preview", true));
+            swBarcodePreview.setEnabled(swThumbnails.isChecked());
 
             swListCount.setChecked(prefs.getBoolean("list_count", false));
             swBundledFonts.setChecked(prefs.getBoolean("bundled_fonts", true));

app/src/main/res/layout/fragment_options_display.xml

@@ -2084,6 +2084,18 @@
                     app:layout_constraintTop_toBottomOf="@id/swVideoPreview"
                     app:switchPadding="12dp" />
 
+                <androidx.appcompat.widget.SwitchCompat
+                    android:id="@+id/swBarcodePreview"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="12dp"
+                    android:layout_marginTop="12dp"
+                    android:text="@string/title_advanced_barcode_preview"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/swAudioPreview"
+                    app:switchPadding="12dp" />
+
                 <androidx.constraintlayout.widget.Group
                     android:id="@+id/grpUnzip"
                     android:layout_width="0dp"

app/src/main/res/values/strings.xml

@@ -639,6 +639,7 @@
     <string name="title_advanced_pdf_preview">Show PDF thumbnails</string>
     <string name="title_advanced_video_preview">Show video thumbnails</string>
     <string name="title_advanced_audio_preview">Show mini audio player</string>
+    <string name="title_advanced_barcode_preview">Show barcode content</string>
     <string name="title_advanced_message_text_zoom2">Default message text zoom: %1$s %%</string>
     <string name="title_advanced_editor_text_zoom">Zoom message text also in the message editor</string>
     <string name="title_advanced_overview_mode">Zoom original messages to fit the screen</string>