Update AOSP Dialer source from internal google3 repository at

cl/159428781.

Test: make, treehugger

This CL updates the AOSP Dialer source with all the changes that have
gone into the private google3 repository. This includes all the
changes from cl/152373142 (4/06/2017) to cl/159428781 (6/19/2017).

This goal of these drops is to keep the AOSP source in sync with the
internal google3 repository. Currently these sync are done by hand
with very minor modifications to the internal source code.
See the Android.mk file for list of modifications.
Our current goal is to do frequent drops (daily if possible) and
eventually switched to an automated process.

Change-Id: Ie60a84b3936efd0ea3d95d7c86bf96d2b1663030

1 files changed, 130 insertions, 0 deletions

diff --git a/java/com/android/dialer/contactsfragment/FastScroller.java b/java/com/android/dialer/contactsfragment/FastScroller.java
new file mode 100644
index 000000000..0223c5f1f
--- /dev/null
+++ b/java/com/android/dialer/contactsfragment/FastScroller.java
@@ -0,0 +1,130 @@
+/*
+ * 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.dialer.contactsfragment;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.view.View;
+import android.widget.RelativeLayout;
+import android.widget.TextView;
+
+/** Widget to add fast scrolling to {@link ContactsFragment}. */
+public class FastScroller extends RelativeLayout {
+
+  private final int touchTargetWidth;
+
+  private ContactsAdapter adapter;
+  private LinearLayoutManager layoutManager;
+
+  private TextView container;
+  private View scrollBar;
+
+  private boolean dragStarted;
+
+  public FastScroller(Context context, AttributeSet attrs) {
+    super(context, attrs);
+    touchTargetWidth =
+        context.getResources().getDimensionPixelSize(R.dimen.fast_scroller_touch_target_width);
+  }
+
+  @Override
+  protected void onFinishInflate() {
+    super.onFinishInflate();
+    container = findViewById(R.id.fast_scroller_container);
+    scrollBar = findViewById(R.id.fast_scroller_scroll_bar);
+  }
+
+  void setup(ContactsAdapter adapter, LinearLayoutManager layoutManager) {
+    this.adapter = adapter;
+    this.layoutManager = layoutManager;
+    setVisibility(VISIBLE);
+  }
+
+  @Override
+  public boolean onTouchEvent(@NonNull MotionEvent event) {
+    // Don't override if touch event isn't within desired touch target and dragging hasn't started.
+    if (!dragStarted && getWidth() - touchTargetWidth - event.getX() > 0) {
+      return super.onTouchEvent(event);
+    }
+
+    switch (event.getAction()) {
+      case MotionEvent.ACTION_DOWN:
+        dragStarted = true;
+        container.setVisibility(VISIBLE);
+        scrollBar.setSelected(true);
+        // fall through
+      case MotionEvent.ACTION_MOVE:
+        setContainerAndScrollBarPosition(event.getY());
+        setRecyclerViewPosition(event.getY());
+        return true;
+      case MotionEvent.ACTION_UP:
+      case MotionEvent.ACTION_CANCEL:
+        dragStarted = false;
+        container.setVisibility(INVISIBLE);
+        scrollBar.setSelected(false);
+        return true;
+    }
+    return super.onTouchEvent(event);
+  }
+
+  private void setRecyclerViewPosition(float y) {
+    final int itemCount = adapter.getItemCount();
+    float scrolledPosition = getScrolledPercentage(y) * (float) itemCount;
+    int targetPos = getValueInRange(0, itemCount - 1, (int) scrolledPosition);
+    layoutManager.scrollToPositionWithOffset(targetPos, 0);
+    container.setText(adapter.getHeaderString(targetPos));
+  }
+
+  // Returns a float in range [0, 1] which represents the position of the scroller.
+  private float getScrolledPercentage(float y) {
+    if (scrollBar.getY() == 0) {
+      return 0f;
+    } else if (scrollBar.getY() + scrollBar.getHeight() >= getHeight()) {
+      return 1f;
+    } else {
+      return y / (float) getHeight();
+    }
+  }
+
+  private int getValueInRange(int min, int max, int value) {
+    int minimum = Math.max(min, value);
+    return Math.min(minimum, max);
+  }
+
+  void updateContainerAndScrollBarPosition(RecyclerView recyclerView) {
+    if (!scrollBar.isSelected()) {
+      int verticalScrollOffset = recyclerView.computeVerticalScrollOffset();
+      int verticalScrollRange = recyclerView.computeVerticalScrollRange();
+      float proportion = (float) verticalScrollOffset / ((float) verticalScrollRange - getHeight());
+      setContainerAndScrollBarPosition(getHeight() * proportion);
+    }
+  }
+
+  private void setContainerAndScrollBarPosition(float y) {
+    int scrollBarHeight = scrollBar.getHeight();
+    int containerHeight = container.getHeight();
+    scrollBar.setY(
+        getValueInRange(0, getHeight() - scrollBarHeight, (int) (y - scrollBarHeight / 2)));
+    container.setY(
+        getValueInRange(
+            0, getHeight() - containerHeight - scrollBarHeight / 2, (int) (y - containerHeight)));
+  }
+}