Make work footer stick to the bottom if there are only a few apps

Bug: 70571983
Change-Id: I60ef59de0cfcbc8df24b270d0b6d2f6439ccad44

src/com/android/launcher3/views/WorkModeToggleContainer.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+package com.android.launcher3.views;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.RelativeLayout;
+
+/**
+ * Container to show work mode toggle in all-apps
+ */
+public class WorkModeToggleContainer extends RelativeLayout {
+
+    public WorkModeToggleContainer(Context context) {
+        super(context);
+    }
+
+    public WorkModeToggleContainer(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public WorkModeToggleContainer(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    @Override
+    protected void onLayout(boolean changed, int l, int t, int r, int b) {
+        super.onLayout(changed, l, t, r, b);
+        updateTranslation();
+    }
+
+    @Override
+    public void offsetTopAndBottom(int offset) {
+        super.offsetTopAndBottom(offset);
+        updateTranslation();
+    }
+
+    private void updateTranslation() {
+        if (getParent() instanceof View) {
+            View parent = (View) getParent();
+            int availableBot = parent.getHeight() - parent.getPaddingBottom();
+            setTranslationY(Math.max(0, availableBot - getBottom()));
+        }
+    }
+}