Add support for datalist to text input element on Android

ui/android/java/src/org/chromium/ui/autofill/AutofillListAdapter.java

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 package org.chromium.ui.autofill;
 
 import android.content.Context;
+import android.graphics.Color;
+import android.graphics.drawable.GradientDrawable;

[newt (away), 2013/09/09 20:20:42]

unused

[keishi, 2013/09/19 11:53:05]

Done.

+import android.graphics.drawable.LayerDrawable;
 import android.text.TextUtils;
-
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ArrayAdapter;
 import android.widget.TextView;
 
 import org.chromium.ui.R;
 
 import java.util.ArrayList;
+import java.util.Set;
 
 /**
  * Autofill suggestion adapter for AutofillWindow.
  */
 public class AutofillListAdapter extends ArrayAdapter<AutofillSuggestion> {
     private Context mContext;
+    private Set<Integer> mSeparators;
 
-    AutofillListAdapter(Context context, ArrayList<AutofillSuggestion> objects) {
+    AutofillListAdapter(Context context,
+                        ArrayList<AutofillSuggestion> objects,
+                        Set<Integer> separators) {
         super(context, R.layout.autofill_text, objects);
+        mSeparators = separators;
         mContext = context;
     }
 
     @Override
     public View getView(int position, View convertView, ViewGroup parent) {
         View layout = convertView;
         if (convertView == null) {
             LayoutInflater inflater =
                     (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
             layout = inflater.inflate(R.layout.autofill_text, null);
+            layout.setBackground(new AutofillDividerDrawable());
         }
         TextView labelView = (TextView) layout.findViewById(R.id.autofill_label);
         labelView.setText(getItem(position).mLabel);
 
+        int dividerColor;
+        int dividerWidth;
+        if (position == 0) {
+            dividerWidth = 0;
+            dividerColor = Color.TRANSPARENT;
+        } else {
+            dividerWidth = 1;
+            if (mSeparators.contains(position)) {
+                dividerColor = mContext.getResources().getColor(
+                        R.color.autofill_dark_divider_color);
+            } else {
+                dividerColor = mContext.getResources().getColor(R.color.autofill_divider_color);
+            }
+        }
+        layout.setPaddingRelative(layout.getPaddingStart(), dividerWidth,

[newt (away), 2013/09/09 20:20:42]

getPaddingX() returns user-specific padding plus internal padding (for scroll
bars, etc). As a result, you should avoid setting the padding to the current
getPadding value. I'd just write:

    layout.setPadding(0, dividerWidthPx, 0, 0);

Also, dividerWidthPx should be calculated as:

    int dividerWidthDp = 1;  // or whatever
    dividerWidthPx = getContext().getResources().density * dividerWidthDp;

[keishi, 2013/09/10 09:19:56]

The default ListView seems to have a default dividerWidth of 1px.
I've checked divider_horizontal_dark_opaque.9.png in the SDK and it is a 3x3
9-patch for every dpi.

[newt (away), 2013/09/10 17:45:10]

divider_horizontal_dark_opaque.9.png is just a single pixel that gets stretched
to whatever size is needed. You can override the divider color and/or height
using ListView.setDivider() and ListView.setDividerHeight(). I think you should
override the color, so the color of the dividers between adjacent elements
matches the color of the extra divider between the two groups.

[keishi, 2013/09/19 11:53:05]

I'm not sure what you are getting at. We don't use the ListView divider at all.
ListView uses a single drawable to draw all dividers, so we can't change
dividers unless we subclass ListView. We can't use a subclassed ListView because
we the ListView is constructed by the ListPopupWindow.

+                                  layout.getPaddingEnd(), layout.getPaddingBottom());
+        AutofillDividerDrawable divider = (AutofillDividerDrawable) layout.getBackground();
+        divider.setColor(dividerColor);

[newt (away), 2013/09/09 20:20:42]

and add divider.setHeight() here

+
         TextView sublabelView = (TextView) layout.findViewById(R.id.autofill_sublabel);
         CharSequence sublabel = getItem(position).mSublabel;
         if (TextUtils.isEmpty(sublabel)) {
             sublabelView.setVisibility(View.GONE);
         } else {
             sublabelView.setText(sublabel);
             sublabelView.setVisibility(View.VISIBLE);
         }
 
         return layout;
     }
 }