1 files changed, 75 insertions, 0 deletions
diff --git a/src/com/android/packageinstaller/CaffeinatedScrollView.java b/src/com/android/packageinstaller/CaffeinatedScrollView.java
new file mode 100644
index 00000000..723ae13c
--- /dev/null
+++ b/src/com/android/packageinstaller/CaffeinatedScrollView.java
@@ -0,0 +1,75 @@
+/*
+**
+** Copyright 2012, 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.packageinstaller;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.util.AttributeSet;
+import android.widget.ScrollView;
+
+/**
+ * It's a ScrollView that knows how to stay awake.
+ */
+class CaffeinatedScrollView extends ScrollView {
+    private Runnable mFullScrollAction;
+    private int mBottomSlop;
+
+    public CaffeinatedScrollView(Context context) {
+        super(context);
+    }
+
+    public CaffeinatedScrollView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    /**
+     * Make this visible so we can call it
+     */
+    @Override
+    public boolean awakenScrollBars() {
+        return super.awakenScrollBars();
+    }
+
+    public void setFullScrollAction(Runnable action) {
+        mFullScrollAction = action;
+        mBottomSlop = (int)(4 * getResources().getDisplayMetrics().density);
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        super.onDraw(canvas);
+        checkFullScrollAction();
+    }
+
+    @Override
+    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
+        super.onScrollChanged(l, t, oldl, oldt);
+        checkFullScrollAction();
+    }
+
+    private void checkFullScrollAction() {
+        if (mFullScrollAction != null) {
+            int daBottom = getChildAt(0).getBottom();
+            int screenBottom = getScrollY() + getHeight() - getPaddingBottom();
+            if ((daBottom - screenBottom) < mBottomSlop) {
+                mFullScrollAction.run();
+                mFullScrollAction = null;
+            }
+        }
+    }
+}