feat: better layout for the message list

This is to close #8 issue.
The new interface is much more "material" and ergonomic.
The sender is displayed (either compact or with full address) below.
Then, a quick & small email summary is shown.
The thread message count is only displayed if there is more than a single message.
I'm using light font here, and the same color for both unread & read messages. Unread messages are using bold font.

app/src/main/java/org/dystopia/email/AdapterMessage.java

@@ -97,6 +97,9 @@ import java.util.List;
 import java.util.Locale;
 import javax.mail.Address;
 import javax.mail.internet.InternetAddress;
+
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
 import org.xml.sax.XMLReader;
 
 public class AdapterMessage extends PagedListAdapter<TupleMessageEx, AdapterMessage.ViewHolder> {
@@ -134,6 +137,7 @@ public class AdapterMessage extends PagedListAdapter<TupleMessageEx, AdapterMess
     private ImageView ivFlagged;
     private ImageView ivAvatar;
     private TextView tvFrom;
+    private TextView tvSummary;
     private ImageView ivAddContact;
     private TextView tvSize;
     private TextView tvTime;
@@ -183,6 +187,7 @@ public class AdapterMessage extends PagedListAdapter<TupleMessageEx, AdapterMess
       ivFlagged = itemView.findViewById(R.id.ivFlagged);
       ivAvatar = itemView.findViewById(R.id.ivAvatar);
       tvFrom = itemView.findViewById(R.id.tvFrom);
+      tvSummary = itemView.findViewById(R.id.tvSummary);
       ivAddContact = itemView.findViewById(R.id.ivAddContact);
       tvSize = itemView.findViewById(R.id.tvSize);
       tvTime = itemView.findViewById(R.id.tvTime);
@@ -317,18 +322,19 @@ public class AdapterMessage extends PagedListAdapter<TupleMessageEx, AdapterMess
       if (EntityFolder.DRAFTS.equals(message.folderType)
           || EntityFolder.OUTBOX.equals(message.folderType)
           || EntityFolder.SENT.equals(message.folderType)) {
-        tvFrom.setText(MessageHelper.getFormattedAddresses(message.to, !compact));
+        tvFrom.setText(MessageHelper.getFormattedAddresses(message.to, show_expanded));
         tvTime.setText(
             DateUtils.getRelativeTimeSpanString(
                 context, message.sent == null ? message.received : message.sent));
       } else {
-        tvFrom.setText(MessageHelper.getFormattedAddresses(message.from, !compact));
+        tvFrom.setText(MessageHelper.getFormattedAddresses(message.from, show_expanded));
         tvTime.setText(DateUtils.getRelativeTimeSpanString(context, message.received));
       }
 
       tvSize.setText(
           message.size == null ? null : Helper.humanReadableByteCount(message.size, true));
       tvSize.setAlpha(message.content ? 1.0f : 0.5f);
+      tvSize.setVisibility(compact && !show_expanded ? View.GONE : View.VISIBLE);
 
       ivAttachments.setVisibility(message.attachments > 0 ? View.VISIBLE : View.GONE);
       tvSubject.setText(message.subject);
@@ -336,25 +342,41 @@ public class AdapterMessage extends PagedListAdapter<TupleMessageEx, AdapterMess
       tvFolder.setVisibility(View.GONE);
       tvAccount.setVisibility(View.GONE);
 
-      if (viewType == ViewType.UNIFIED || viewType == ViewType.FOLDER) {
-        tvAccount.setText(message.accountName);
-        tvAccount.setVisibility(View.VISIBLE);
-      } else {
-        tvFolder.setText(
-            message.folderDisplay == null
-                ? Helper.localizeFolderName(context, message.folderName)
-                : message.folderDisplay);
-        tvFolder.setVisibility(View.VISIBLE);
+      if (!compact || show_expanded) {
+        if (viewType == ViewType.UNIFIED || viewType == ViewType.FOLDER) {
+          tvAccount.setText(message.accountName);
+          tvAccount.setVisibility(View.VISIBLE);
+        } else {
+          tvFolder.setText(
+                  message.folderDisplay == null
+                          ? Helper.localizeFolderName(context, message.folderName)
+                          : message.folderDisplay);
+          tvFolder.setVisibility(View.VISIBLE);
+        }
       }
 
-      if (viewType == ViewType.THREAD) {
+      if (viewType == ViewType.THREAD || message.count == 1) {
         tvCount.setVisibility(View.GONE);
         ivThread.setVisibility(View.GONE);
       } else {
         tvCount.setText(Integer.toString(message.count));
+        tvCount.setVisibility(View.VISIBLE);
         ivThread.setVisibility(View.VISIBLE);
       }
 
+      tvSummary.setVisibility(View.GONE);
+      if (message.content && !show_expanded)
+      {
+        try {
+          String body = message.read(context);
+          Document doc = Jsoup.parse(body);
+          String plainText = doc.body().text();
+          int limit = compact ? 60 : 120;
+          tvSummary.setText(plainText.substring(0, Math.min(plainText.length(), limit)) + "...");
+          tvSummary.setVisibility(View.VISIBLE);
+        } catch(IOException e) { }
+      }
+
       if (debug) {
         db.operation().getOperationsByMessage(message.id).removeObservers(owner);
         db.operation()
@@ -406,11 +428,11 @@ public class AdapterMessage extends PagedListAdapter<TupleMessageEx, AdapterMess
       tvSubject.setTypeface(null, typeface);
       tvCount.setTypeface(null, typeface);
 
-      int colorUnseen =
-          Helper.resolveColor(
-              context, message.unseen > 0 ? R.attr.colorUnread : android.R.attr.textColorSecondary);
+      int colorUnseen = Helper.resolveColor(context, R.attr.colorUnread);
+      tvSubject.setTextColor(colorUnseen);
       tvFrom.setTextColor(colorUnseen);
       tvTime.setTextColor(colorUnseen);
+      tvSummary.setTextColor(Helper.resolveColor(context, android.R.attr.textColorSecondary));
 
       grpExpanded.setVisibility(
           viewType == ViewType.THREAD && show_expanded ? View.VISIBLE : View.GONE);
@@ -711,6 +733,7 @@ public class AdapterMessage extends PagedListAdapter<TupleMessageEx, AdapterMess
           }
         };
 
+
     private Spanned decodeHtml(final EntityMessage message, String body) {
       return Html.fromHtml(
           HtmlHelper.sanitize(body),

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

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content">
 
@@ -65,10 +66,11 @@
             android:layout_marginStart="6dp"
             android:layout_marginEnd="20dp"
             android:ellipsize="end"
+            android:fontFamily="sans-serif-light"
             android:maxLines="1"
             android:text="From"
             android:textAppearance="@style/TextAppearance.AppCompat.Medium"
-            app:layout_constraintEnd_toStartOf="@+id/tvSize"
+            app:layout_constraintEnd_toStartOf="@id/tvTime"
             app:layout_constraintStart_toEndOf="@id/ivAvatar"
             app:layout_constraintTop_toBottomOf="@id/paddingTop" />
 
@@ -80,7 +82,6 @@
             android:maxLines="1"
             android:text="Time"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
-            app:layout_constraintBottom_toBottomOf="@id/tvFrom"
             app:layout_constraintEnd_toStartOf="@+id/ivFlagged"
             app:layout_constraintTop_toTopOf="@id/tvFrom" />
 
@@ -110,13 +111,14 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_marginStart="6dp"
-            android:layout_marginEnd="6dp"
             android:ellipsize="end"
+            android:fontFamily="sans-serif-light"
             android:maxLines="1"
+            android:minLines="1"
             android:text="Subject"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
-            app:layout_constraintStart_toEndOf="@id/ivAttachments"
             app:layout_constraintEnd_toStartOf="@id/paddingEnd"
+            app:layout_constraintStart_toEndOf="@id/ivAttachments"
             app:layout_constraintTop_toBottomOf="@id/tvFrom" />
 
         <TextView
@@ -125,59 +127,72 @@
             android:layout_height="wrap_content"
             android:layout_marginStart="6dp"
             android:maxLines="1"
-            android:text="acount"
+            android:text="account"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
             app:layout_constraintStart_toEndOf="@id/paddingStart"
-            app:layout_constraintTop_toBottomOf="@id/tvSubject" />
+            app:layout_constraintTop_toBottomOf="@id/tvSummary" />
 
         <TextView
             android:id="@+id/tvFolder"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginStart="6dp"
+            android:background="@color/colorAccent"
             android:maxLines="1"
-            android:text="folder"
             android:paddingLeft="10dp"
             android:paddingRight="10dp"
-            android:textColor="@color/colorActionForeground"
-            android:background="@color/colorAccent"
+            android:text="folder"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
+            android:textColor="@color/colorActionForeground"
             app:layout_constraintStart_toEndOf="@id/tvAccount"
-            app:layout_constraintTop_toBottomOf="@id/tvSubject" />
+            app:layout_constraintTop_toBottomOf="@id/tvSummary" />
 
         <TextView
             android:id="@+id/tvCount"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_marginStart="6dp"
-            android:layout_marginTop="0.5dp"
             android:maxLines="1"
             android:text="3"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
-            app:layout_constraintTop_toBottomOf="@id/tvSubject"
-            app:layout_constraintStart_toEndOf="@id/tvFolder" />
+            app:layout_constraintEnd_toStartOf="@id/ivThread"
+            app:layout_constraintTop_toTopOf="@+id/tvTime" />
 
         <ImageView
             android:id="@+id/ivThread"
             android:layout_width="15dp"
             android:layout_height="15dp"
-            android:layout_marginStart="3dp"
-            android:layout_marginTop="1dp"
+            android:layout_marginTop="3dp"
+            android:layout_marginEnd="6dp"
+            android:paddingStart="2dp"
             android:src="@drawable/baseline_message_24"
-            app:layout_constraintBottom_toBottomOf="@id/tvCount"
-            app:layout_constraintStart_toEndOf="@id/tvCount"
-            app:layout_constraintTop_toTopOf="@id/tvCount" />
+            app:layout_constraintEnd_toStartOf="@id/tvTime"
+            app:layout_constraintTop_toTopOf="@id/tvTime" />
 
         <TextView
             android:id="@+id/tvSize"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_marginEnd="6dp"
+            android:layout_marginEnd="4dp"
             android:maxLines="1"
             android:text="123 KB"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
-            app:layout_constraintTop_toBottomOf="@id/tvSubject"
-            app:layout_constraintEnd_toEndOf="parent" />
+            app:layout_constraintEnd_toEndOf="@id/paddingEnd"
+            app:layout_constraintEnd_toStartOf="@+id/paddingEnd"
+            app:layout_constraintTop_toBottomOf="@id/tvSummary" />
+
+        <TextView
+            android:id="@+id/tvSummary"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="8dp"
+            android:fontFamily="sans-serif-light"
+            android:maxLines="1"
+            android:minLines="1"
+            android:text="Summary"
+            android:textStyle="italic"
+            app:layout_constraintEnd_toEndOf="@id/paddingEnd"
+            app:layout_constraintStart_toEndOf="@id/paddingStart"
+            app:layout_constraintTop_toBottomOf="@id/tvSubject" />
 
         <TextView
             android:id="@+id/tvError"
@@ -461,7 +476,6 @@
             android:layout_marginStart="6dp"
             android:layout_marginTop="3dp"
             android:layout_marginEnd="6dp"
-            android:fontFamily="monospace"
             android:minHeight="60dp"
             android:text="Body"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"

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

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content">
 
@@ -56,6 +57,21 @@
             app:layout_constraintStart_toEndOf="@id/paddingStart"
             app:layout_constraintTop_toTopOf="@+id/tvFrom" />
 
+        <TextView
+            android:id="@+id/tvSubject"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="6dp"
+            android:ellipsize="end"
+            android:fontFamily="sans-serif-light"
+            android:maxLines="1"
+            android:minLines="1"
+            android:text="Subject"
+            android:textAppearance="@style/TextAppearance.AppCompat.Small"
+            app:layout_constraintEnd_toStartOf="@id/paddingEnd"
+            app:layout_constraintStart_toEndOf="@id/ivAttachments"
+            app:layout_constraintTop_toBottomOf="@id/tvFrom" />
+
         <TextView
             android:id="@+id/tvFrom"
             android:layout_width="0dp"
@@ -63,6 +79,8 @@
             android:layout_marginStart="6dp"
             android:layout_marginEnd="6dp"
             android:ellipsize="end"
+            android:fontFamily="sans-serif-light"
+            android:maxLines="1"
             android:text="From"
             android:textAppearance="@style/TextAppearance.AppCompat.Medium"
             app:layout_constraintEnd_toStartOf="@+id/tvTime"
@@ -102,78 +120,76 @@
             app:layout_constraintStart_toEndOf="@id/paddingStart"
             app:layout_constraintTop_toTopOf="@+id/tvSubject" />
 
-        <TextView
-            android:id="@+id/tvSubject"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:layout_marginStart="6dp"
-            android:layout_marginTop="6dp"
-            android:layout_marginEnd="6dp"
-            android:ellipsize="end"
-            android:text="Subject"
-            android:textAppearance="@style/TextAppearance.AppCompat.Small"
-            app:layout_constraintStart_toEndOf="@id/ivAttachments"
-            app:layout_constraintEnd_toStartOf="@id/paddingEnd"
-            app:layout_constraintTop_toBottomOf="@id/tvFrom" />
-
         <TextView
             android:id="@+id/tvAccount"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_marginStart="6dp"
+            android:layout_marginStart="8dp"
             android:maxLines="1"
-            android:text="acount"
+            android:text="account"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
             app:layout_constraintStart_toEndOf="@id/paddingStart"
-            app:layout_constraintTop_toBottomOf="@id/tvSubject" />
+            app:layout_constraintTop_toBottomOf="@id/tvSummary" />
 
         <TextView
             android:id="@+id/tvFolder"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginStart="6dp"
+            android:background="@color/colorAccent"
             android:maxLines="1"
-            android:text="folder"
             android:paddingLeft="10dp"
             android:paddingRight="10dp"
-            android:textColor="@color/colorActionForeground"
-            android:background="@color/colorAccent"
+            android:text="folder"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
+            android:textColor="@color/colorActionForeground"
             app:layout_constraintStart_toEndOf="@id/tvAccount"
-            app:layout_constraintTop_toBottomOf="@id/tvSubject" />
+            app:layout_constraintTop_toBottomOf="@id/tvSummary" />
 
         <TextView
             android:id="@+id/tvCount"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_marginStart="6dp"
-            android:layout_marginTop="0.5dp"
+            android:layout_marginStart="28dp"
             android:maxLines="1"
             android:text="3"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
-            app:layout_constraintTop_toBottomOf="@id/tvSubject"
-            app:layout_constraintStart_toEndOf="@id/tvFolder" />
+            app:layout_constraintStart_toEndOf="@id/tvFolder"
+            app:layout_constraintTop_toTopOf="@id/tvFolder" />
 
         <ImageView
             android:id="@+id/ivThread"
             android:layout_width="15dp"
             android:layout_height="15dp"
-            android:layout_marginStart="3dp"
-            android:layout_marginTop="1dp"
+            android:layout_marginTop="2dp"
+            android:paddingStart="2dp"
             android:src="@drawable/baseline_message_24"
-            app:layout_constraintBottom_toBottomOf="@id/tvCount"
             app:layout_constraintStart_toEndOf="@id/tvCount"
-            app:layout_constraintTop_toTopOf="@id/tvCount" />
+            app:layout_constraintTop_toTopOf="@id/tvFolder" />
 
         <TextView
             android:id="@+id/tvSize"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_marginEnd="6dp"
+            android:layout_marginEnd="4dp"
             android:maxLines="1"
             android:text="123 KB"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
-            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintEnd_toEndOf="@+id/paddingEnd"
+            app:layout_constraintTop_toBottomOf="@id/tvSummary" />
+
+        <TextView
+            android:id="@+id/tvSummary"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="16dp"
+            android:fontFamily="sans-serif-light"
+            android:maxLines="2"
+            android:minLines="1"
+            android:text="Summary"
+            android:textStyle="italic"
+            app:layout_constraintEnd_toStartOf="@id/paddingEnd"
+            app:layout_constraintStart_toStartOf="@id/paddingStart"
             app:layout_constraintTop_toBottomOf="@id/tvSubject" />
 
         <TextView
@@ -457,7 +473,6 @@
             android:layout_marginStart="6dp"
             android:layout_marginTop="3dp"
             android:layout_marginEnd="6dp"
-            android:fontFamily="monospace"
             android:minHeight="60dp"
             android:text="Body"
             android:textAppearance="@style/TextAppearance.AppCompat.Medium"