From e74d97824b214d8b791eca206143d8d107a812ee Mon Sep 17 00:00:00 2001
From: cristianomatos <cristianobmatos@gmail.com>
Date: Wed, 21 Dec 2016 14:17:35 +0100
Subject: [PATCH] Add Clear All Button to Recents [1/2]

Change-Id: I4f17161251fdb1de2031f91985bc2192e6b22c8b
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
---

diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 0b11c88..bd33189 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -4198,6 +4198,18 @@
         public static final String SYSTEMUI_RECENTS_MEM_DISPLAY = "systemui_recents_mem_display";
 
         /**
+         * show clear all recents button
+         * @hide
+         */
+        public static final String SHOW_CLEAR_ALL_RECENTS = "show_clear_all_recents";
+
+        /**
+         * location of the clear all rectents button
+         * @hide
+         */
+        public static final String  RECENTS_CLEAR_ALL_LOCATION = "recents_clear_all_location";
+
+        /**
          * Settings to backup. This is here so that it's in the same place as the settings
          * keys and easy to update.
          *
diff --git a/packages/SystemUI/res/drawable/fab.xml b/packages/SystemUI/res/drawable/fab.xml
new file mode 100644
index 0000000..894d953
--- /dev/null
+++ b/packages/SystemUI/res/drawable/fab.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape  xmlns:android="http://schemas.android.com/apk/res/android"
+        android:shape="oval"
+        android:tint="@color/fab_color">
+</shape>
diff --git a/packages/SystemUI/res/drawable/floating_action_button.xml b/packages/SystemUI/res/drawable/floating_action_button.xml
new file mode 100644
index 0000000..57cc972
--- /dev/null
+++ b/packages/SystemUI/res/drawable/floating_action_button.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2014 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<ripple xmlns:android="http://schemas.android.com/apk/res/android"
+    android:color="@android:color/white">
+    <shape
+            android:shape="oval"
+            android:tint="@color/fab_color">
+    </shape>
+</ripple>
diff --git a/packages/SystemUI/res/drawable/ic_dismiss_all.xml b/packages/SystemUI/res/drawable/ic_dismiss_all.xml
new file mode 100644
index 0000000..1452cc5
--- /dev/null
+++ b/packages/SystemUI/res/drawable/ic_dismiss_all.xml
@@ -0,0 +1,8 @@
+<!-- drawable/delete.xml -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:width="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path android:fillColor="#ffffff" android:pathData="M19,4H15.5L14.5,3H9.5L8.5,4H5V6H19M6,19A2,2 0 0,0 8,21H16A2,2 0 0,0 18,19V7H6V19Z" />
+</vector>
diff --git a/packages/SystemUI/res/layout/floating_action_button.xml b/packages/SystemUI/res/layout/floating_action_button.xml
new file mode 100644
index 0000000..bc7ede9
--- /dev/null
+++ b/packages/SystemUI/res/layout/floating_action_button.xml
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2016 crDroid Android Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<!-- This expects to be included inside a RelativeLayout -->
+<FrameLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:id="@+id/floating_action_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginRight="@dimen/floating_action_button_margin_side"
+        android:layout_marginLeft="@dimen/floating_action_button_margin_side"
+        android:layout_marginBottom="@dimen/floating_action_button_margin_bottom"
+        android:background="@drawable/fab"
+        android:elevation="@dimen/floating_action_button_translation_z">
+    <ImageButton
+            android:layout_width="@dimen/floating_action_button_width"
+            android:layout_height="@dimen/floating_action_button_height"
+            android:id="@+id/clear_recents"
+            android:visibility="gone"
+            android:background="@drawable/floating_action_button"
+            android:tint="@color/floating_action_button_icon_color"
+            android:src="@drawable/ic_dismiss_all"/>
+</FrameLayout>
diff --git a/packages/SystemUI/res/layout/recents.xml b/packages/SystemUI/res/layout/recents.xml
index 9d769b7..8f4df72 100644
--- a/packages/SystemUI/res/layout/recents.xml
+++ b/packages/SystemUI/res/layout/recents.xml
@@ -44,4 +44,6 @@
         android:layout_gravity="center_horizontal|bottom"
         android:scaleType="fitXY"
         android:src="@drawable/recents_lower_gradient" />
+
+	<include layout="@layout/floating_action_button"/>
 </FrameLayout>
diff --git a/packages/SystemUI/res/values/aicp_colors.xml b/packages/SystemUI/res/values/aicp_colors.xml
index bcd7a79..0091bc0 100644
--- a/packages/SystemUI/res/values/aicp_colors.xml
+++ b/packages/SystemUI/res/values/aicp_colors.xml
@@ -32,7 +32,6 @@
     <color name="icon_color_home">@android:color/white</color>
     <color name="icon_color_overview">@android:color/white</color>
 
-
     <!-- Navigation button ripple color -->
     <color name="navbutton_ripple_color">#FFFFFFFF</color>
 
@@ -42,7 +41,7 @@
     <!-- Nav bar tuner colors -->
     <color name="navbar_tuner_background_color">@android:color/white</color>
     <color name="navbar_tuner_text_color">@*android:color/material_deep_teal_500</color>
-	
+
     <!-- QS alarm status text color -->
     <color name="qs_alarm_status_text_color">#64ffffff</color>
 
@@ -52,4 +51,8 @@
     <!-- QS edit button text color -->
     <color name="qs_edit_button_text_color">#64FFFFFF</color>
 
+    <!-- Floating action button -->
+    <color name="fab_color">?android:attr/colorAccent</color>
+    <color name="floating_action_button_icon_color">@android:color/white</color>
+
 </resources>
diff --git a/packages/SystemUI/res/values/aicp_dimens.xml b/packages/SystemUI/res/values/aicp_dimens.xml
index 9bbfd29..3a8f4ba 100644
--- a/packages/SystemUI/res/values/aicp_dimens.xml
+++ b/packages/SystemUI/res/values/aicp_dimens.xml
@@ -29,5 +29,9 @@
 
     <!-- Floating action button -->
     <dimen name="floating_action_button_translation_z">12dp</dimen>
+    <dimen name="floating_action_button_height">54dp</dimen>
+    <dimen name="floating_action_button_width">54dp</dimen>
+    <dimen name="floating_action_button_margin_side">32dp</dimen>
+    <dimen name="floating_action_button_margin_bottom">46dp</dimen>
 
 </resources>
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/RecentsView.java b/packages/SystemUI/src/com/android/systemui/recents/views/RecentsView.java
index a1f34b8..1011cbb 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/RecentsView.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/RecentsView.java
@@ -26,16 +26,22 @@
 import android.app.ActivityManager.MemoryInfo;
 import android.content.Context;
 import android.content.ContentResolver;
+import android.content.res.Configuration;
 import android.content.res.Resources;
+import android.database.ContentObserver;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Outline;
 import android.graphics.Rect;
 import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
+import android.net.Uri;
+import android.os.UserHandle;
+import android.os.Handler;
 import android.util.ArraySet;
 import android.util.AttributeSet;
 import android.view.AppTransitionAnimationSpec;
+import android.view.Gravity;
 import android.view.IAppTransitionAnimationSpecsFuture;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
@@ -47,6 +53,7 @@
 import android.widget.FrameLayout;
 import android.widget.ProgressBar;
 import android.widget.TextView;
+import android.widget.ImageButton;
 
 import com.android.internal.logging.MetricsLogger;
 import com.android.internal.logging.MetricsProto.MetricsEvent;
@@ -112,6 +119,11 @@
     private TaskStackView mTaskStackView;
     private TextView mStackActionButton;
     private TextView mEmptyView;
+    private SettingsObserver mSettingsObserver;
+    private boolean showClearAllRecents;
+    View mFloatingButton;
+    View mClearRecents;
+    private int clearRecentsLocation;
 
     private boolean mAwaitingFirstLayout = true;
     private boolean mLastTaskLaunchedWasFreeform;
@@ -173,6 +185,7 @@
         mEmptyView = (TextView) inflater.inflate(R.layout.recents_empty, this, false);
         addView(mEmptyView);
         mAm = (ActivityManager) mContext.getSystemService(Context.ACTIVITY_SERVICE);
+        mSettingsObserver = new SettingsObserver(new Handler());
     }
 
     /**
@@ -224,8 +237,14 @@
         // Update the top level view's visibilities
         if (stack.getTaskCount() > 0) {
             hideEmptyView();
+            if (mFloatingButton != null) {
+                mFloatingButton.setVisibility(View.VISIBLE);
+            }
         } else {
             showEmptyView(R.string.recents_empty_message);
+            if (mFloatingButton != null) {
+                mFloatingButton.setVisibility(View.GONE);
+            }
         }
     }
 
@@ -332,8 +351,16 @@
         EventBus.getDefault().register(this, RecentsActivity.EVENT_BUS_PRIORITY + 1);
         EventBus.getDefault().register(mTouchHandler, RecentsActivity.EVENT_BUS_PRIORITY + 2);
         super.onAttachedToWindow();
-		mMemText = (TextView) ((View)getParent()).findViewById(R.id.recents_memory_text);
+        mMemText = (TextView) ((View)getParent()).findViewById(R.id.recents_memory_text);
         mMemBar = (ProgressBar) ((View)getParent()).findViewById(R.id.recents_memory_bar);
+        mSettingsObserver.observe();
+        mClearRecents.setVisibility(View.VISIBLE);
+        mClearRecents.setOnClickListener(new View.OnClickListener() {
+            public void onClick(View v) {
+                EventBus.getDefault().send(new DismissAllTaskViewsEvent());
+                updateMemoryStatus();
+            }
+        });
     }
 
     @Override
@@ -341,6 +368,7 @@
         super.onDetachedFromWindow();
         EventBus.getDefault().unregister(this);
         EventBus.getDefault().unregister(mTouchHandler);
+        mSettingsObserver.unobserve();
     }
 
     /**
@@ -354,7 +382,7 @@
 
         if (mTaskStackView.getVisibility() != GONE) {
             mTaskStackView.measure(widthMeasureSpec, heightMeasureSpec);
-        showMemDisplay();
+            showMemDisplay();
         }
 
         // Measure the empty view to the full size of the screen
@@ -372,6 +400,51 @@
         }
 
         setMeasuredDimension(width, height);
+
+        if (mFloatingButton != null && showClearAllRecents) {
+            clearRecentsLocation = Settings.System.getIntForUser(
+                mContext.getContentResolver(), Settings.System.RECENTS_CLEAR_ALL_LOCATION,
+                3, UserHandle.USER_CURRENT);
+            FrameLayout.LayoutParams params = (FrameLayout.LayoutParams)
+                    mFloatingButton.getLayoutParams();
+            boolean isLandscape = mContext.getResources().getConfiguration().orientation
+                == Configuration.ORIENTATION_LANDSCAPE;
+            if (isLandscape) {
+                params.topMargin = mContext.getResources().
+                      getDimensionPixelSize(com.android.internal.R.dimen.status_bar_height);
+            } else {
+                params.topMargin = 2*(mContext.getResources().
+                    getDimensionPixelSize(com.android.internal.R.dimen.status_bar_height));
+            }
+
+            switch (clearRecentsLocation) {
+                case 0:
+                    params.gravity = Gravity.TOP | Gravity.RIGHT;
+                    break;
+                case 1:
+                    params.gravity = Gravity.TOP | Gravity.LEFT;
+                    break;
+                case 2:
+                    params.gravity = Gravity.TOP | Gravity.CENTER;
+                    break;
+                case 3:
+                default:
+                    params.gravity = Gravity.BOTTOM | Gravity.RIGHT;
+                    break;
+                case 4:
+                    params.gravity = Gravity.BOTTOM | Gravity.LEFT;
+                    break;
+                case 5:
+                    params.gravity = Gravity.BOTTOM | Gravity.CENTER;
+                    break;
+            }
+            mFloatingButton.setLayoutParams(params);
+        } else {
+            mFloatingButton.setVisibility(View.GONE);
+        }
+        LayoutInflater inflater = LayoutInflater.from(mContext);
+        float cornerRadius = mContext.getResources().getDimensionPixelSize(
+                    R.dimen.recents_task_view_rounded_corners_radius);
     }
 
     private boolean showMemDisplay() {
@@ -396,11 +469,11 @@
 
         MemoryInfo memInfo = new MemoryInfo();
         mAm.getMemoryInfo(memInfo);
-            int available = (int)(memInfo.availMem / 1048576L);
-            int max = (int)(getTotalMemory() / 1048576L);
-            mMemText.setText("Free RAM: " + String.valueOf(available) + "MB");
-            mMemBar.setMax(max);
-            mMemBar.setProgress(available);
+        int available = (int)(memInfo.availMem / 1048576L);
+        int max = (int)(getTotalMemory() / 1048576L);
+        mMemText.setText("Free RAM: " + String.valueOf(available) + "MB");
+        mMemBar.setMax(max);
+        mMemBar.setProgress(available);
     }
 
     public long getTotalMemory() {
@@ -706,7 +779,9 @@
         if (!RecentsDebugFlags.Static.EnableStackActionButton) {
             return;
         }
-
+        if (showClearAllRecents) {
+            return;
+        }
         final ReferenceCountedTrigger postAnimationTrigger = new ReferenceCountedTrigger();
         if (mStackActionButton.getVisibility() == View.INVISIBLE) {
             mStackActionButton.setVisibility(View.VISIBLE);
@@ -867,4 +942,34 @@
             mTaskStackView.dump(innerPrefix, writer);
         }
     }
+
+    class SettingsObserver extends ContentObserver {
+         SettingsObserver(Handler handler) {
+             super(handler);
+         }
+
+         void observe() {
+             ContentResolver resolver = mContext.getContentResolver();
+             resolver.registerContentObserver(Settings.System.getUriFor(
+                     Settings.System.SHOW_CLEAR_ALL_RECENTS), false, this, UserHandle.USER_ALL);
+             update();
+         }
+
+         void unobserve() {
+             ContentResolver resolver = mContext.getContentResolver();
+             resolver.unregisterContentObserver(this);
+         }
+
+         @Override
+         public void onChange(boolean selfChange, Uri uri) {
+             update();
+         }
+
+   public void update() {
+        mFloatingButton = ((View)getParent()).findViewById(R.id.floating_action_button);
+        mClearRecents = (ImageButton) ((View)getParent()).findViewById(R.id.clear_recents);
+        showClearAllRecents = Settings.System.getIntForUser(mContext.getContentResolver(),
+                Settings.System.SHOW_CLEAR_ALL_RECENTS, 1, UserHandle.USER_CURRENT) != 0;
+         }
+     }
 }