From 79b458f708db5eb7c7348430d80d55436d19e408 Mon Sep 17 00:00:00 2001
From: M66B <M66B@users.noreply.github.com>
Date: Fri, 17 May 2024 20:20:33 +0200
Subject: [PATCH] Added collapsible toolbar

---
 .../java/eu/faircode/email/ActivityBase.java  |  36 ++++--
 app/src/main/res/layout/toolbar_holder.xml    | 111 ++++++++++--------
 2 files changed, 84 insertions(+), 63 deletions(-)

diff --git a/app/src/main/java/eu/faircode/email/ActivityBase.java b/app/src/main/java/eu/faircode/email/ActivityBase.java
index d40e54a58d..dc918a7618 100644
--- a/app/src/main/java/eu/faircode/email/ActivityBase.java
+++ b/app/src/main/java/eu/faircode/email/ActivityBase.java
@@ -73,6 +73,8 @@ import androidx.lifecycle.LifecycleOwner;
 import androidx.lifecycle.OnLifecycleEvent;
 import androidx.preference.PreferenceManager;
 
+import com.google.android.material.appbar.AppBarLayout;
+
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
@@ -106,19 +108,31 @@ abstract class ActivityBase extends AppCompatActivity implements SharedPreferenc
     public void setContentView(View view) {
         LayoutInflater inflater = LayoutInflater.from(this);
 
-        ViewGroup container = (ViewGroup) inflater.inflate(R.layout.toolbar_holder, null);
-        View placeholder = container.findViewById(R.id.placeholder);
-        container.removeView(placeholder);
-        container.addView(view, placeholder.getLayoutParams());
+        ViewGroup holder = (ViewGroup) inflater.inflate(R.layout.toolbar_holder, null);
+
+        AppBarLayout appbar = holder.findViewById(R.id.appbar);
+        Toolbar toolbar = holder.findViewById(R.id.toolbar);
+        View placeholder = holder.findViewById(R.id.placeholder);
 
-        Toolbar toolbar = container.findViewById(R.id.toolbar);
         toolbar.setPopupTheme(getThemeId());
-
         setSupportActionBar(toolbar);
 
-        FragmentDialogTheme.setBackground(this, container, this instanceof ActivityCompose);
+        holder.removeView(placeholder);
+        holder.addView(view, placeholder.getLayoutParams());
 
-        ViewCompat.setOnApplyWindowInsetsListener(container, (v, windowInsets) -> {
+        int abh = Helper.getActionBarHeight(this);
+        appbar.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
+            @Override
+            public void onOffsetChanged(AppBarLayout appBarLayout, int i) {
+                ViewGroup.MarginLayoutParams mlp = (ViewGroup.MarginLayoutParams) view.getLayoutParams();
+                mlp.topMargin = abh + i;
+                view.setLayoutParams(mlp);
+            }
+        });
+
+        FragmentDialogTheme.setBackground(this, holder, this instanceof ActivityCompose);
+
+        ViewCompat.setOnApplyWindowInsetsListener(holder, (v, windowInsets) -> {
             Insets insets = windowInsets.getInsets(WindowInsetsCompat.Type.systemBars());
 
             ViewGroup.MarginLayoutParams mlp = (ViewGroup.MarginLayoutParams) v.getLayoutParams();
@@ -133,7 +147,7 @@ abstract class ActivityBase extends AppCompatActivity implements SharedPreferenc
 
         if (this instanceof ActivityCompose)
             ViewCompat.setWindowInsetsAnimationCallback(
-                    container,
+                    holder,
                     new WindowInsetsAnimationCompat.Callback(WindowInsetsAnimationCompat.Callback.DISPATCH_MODE_STOP) {
                         @NonNull
                         @Override
@@ -146,7 +160,7 @@ abstract class ActivityBase extends AppCompatActivity implements SharedPreferenc
                                     Insets insets = windowInsets.getInsets(WindowInsetsCompat.Type.systemBars());
                                     int bottom = windowInsets.getInsets(WindowInsetsCompat.Type.ime()).bottom;
                                     int pad = bottom - insets.bottom;
-                                    container.setPaddingRelative(0, 0, 0, pad < 0 ? 0 : pad);
+                                    holder.setPaddingRelative(0, 0, 0, pad < 0 ? 0 : pad);
                                     break;
                                 }
 
@@ -154,7 +168,7 @@ abstract class ActivityBase extends AppCompatActivity implements SharedPreferenc
                         }
                     });
 
-        super.setContentView(container);
+        super.setContentView(holder);
 
         int colorPrimaryDark = Helper.resolveColor(this, androidx.appcompat.R.attr.colorPrimaryDark);
         view.post(new RunnableEx("setBackgroundColor") {
diff --git a/app/src/main/res/layout/toolbar_holder.xml b/app/src/main/res/layout/toolbar_holder.xml
index f0b5b5b4d4..4721ed51fc 100644
--- a/app/src/main/res/layout/toolbar_holder.xml
+++ b/app/src/main/res/layout/toolbar_holder.xml
@@ -1,71 +1,78 @@
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout 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="match_parent"
     tools:context="eu.faircode.email.ActivityView">
 
-    <eu.faircode.email.ToolbarEx
-        android:id="@+id/toolbar"
+    <com.google.android.material.appbar.AppBarLayout
+        android:id="@+id/appbar"
         android:layout_width="match_parent"
-        android:layout_height="?attr/actionBarSize"
-        android:background="?attr/colorPrimary"
-        app:theme="@style/actionBarStyle"
-        android:elevation="8dp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent">
+        android:layout_height="wrap_content">
 
-        <androidx.constraintlayout.widget.ConstraintLayout
+        <eu.faircode.email.ToolbarEx
+            android:id="@+id/toolbar"
             android:layout_width="match_parent"
-            android:layout_height="wrap_content">
+            android:layout_height="?attr/actionBarSize"
+            android:background="?attr/colorPrimary"
+            android:elevation="8dp"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_scrollFlags="scroll|enterAlways"
+            app:theme="@style/actionBarStyle">
 
-            <TextView
-                android:id="@+id/title"
-                android:layout_width="0dp"
-                android:layout_height="wrap_content"
-                android:ellipsize="end"
-                android:singleLine="true"
-                android:text="Title"
-                android:textAppearance="@style/TextAppearance.AppCompat.Widget.ActionBar.Title"
-                app:layout_constraintEnd_toStartOf="@+id/count"
-                app:layout_constraintStart_toStartOf="parent"
-                app:layout_constraintTop_toTopOf="parent" />
+            <androidx.constraintlayout.widget.ConstraintLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
 
-            <TextView
-                android:id="@+id/count"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:ellipsize="end"
-                android:paddingStart="6dp"
-                android:singleLine="true"
-                android:text="123"
-                android:textAppearance="@style/TextAppearance.AppCompat.Widget.ActionBar.Subtitle"
-                android:textSize="12dp"
-                app:layout_constraintBottom_toBottomOf="@id/title"
-                app:layout_constraintEnd_toEndOf="parent"
-                app:layout_constraintTop_toTopOf="@id/title" />
+                <TextView
+                    android:id="@+id/title"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:ellipsize="end"
+                    android:singleLine="true"
+                    android:text="Title"
+                    android:textAppearance="@style/TextAppearance.AppCompat.Widget.ActionBar.Title"
+                    app:layout_constraintEnd_toStartOf="@+id/count"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toTopOf="parent" />
 
-            <TextView
-                android:id="@+id/subtitle"
-                android:layout_width="0dp"
-                android:layout_height="wrap_content"
-                android:ellipsize="start"
-                android:singleLine="true"
-                android:text="Subtitle"
-                android:textAppearance="@style/TextAppearance.AppCompat.Widget.ActionBar.Subtitle"
-                app:layout_constraintEnd_toEndOf="parent"
-                app:layout_constraintStart_toStartOf="parent"
-                app:layout_constraintTop_toBottomOf="@id/title" />
-        </androidx.constraintlayout.widget.ConstraintLayout>
-    </eu.faircode.email.ToolbarEx>
+                <TextView
+                    android:id="@+id/count"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:ellipsize="end"
+                    android:paddingStart="6dp"
+                    android:singleLine="true"
+                    android:text="123"
+                    android:textAppearance="@style/TextAppearance.AppCompat.Widget.ActionBar.Subtitle"
+                    android:textSize="12dp"
+                    app:layout_constraintBottom_toBottomOf="@id/title"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintTop_toTopOf="@id/title" />
+
+                <TextView
+                    android:id="@+id/subtitle"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:ellipsize="start"
+                    android:singleLine="true"
+                    android:text="Subtitle"
+                    android:textAppearance="@style/TextAppearance.AppCompat.Widget.ActionBar.Subtitle"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/title" />
+            </androidx.constraintlayout.widget.ConstraintLayout>
+        </eu.faircode.email.ToolbarEx>
+    </com.google.android.material.appbar.AppBarLayout>
 
     <View
         android:id="@+id/placeholder"
-        android:layout_width="0dp"
-        android:layout_height="0dp"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@id/toolbar" />
-</androidx.constraintlayout.widget.ConstraintLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>