Show Ash like <select> popup on Android tablets

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

Index: ui/android/java/src/org/chromium/ui/autofill/AutofillPopup.java
diff --git a/ui/android/java/src/org/chromium/ui/autofill/AutofillPopup.java b/ui/android/java/src/org/chromium/ui/autofill/AutofillPopup.java
index 749ab75e7efa6301c9b40351077fc63cfe8f1eae..d2f9bc7ea7696ad3d00635134e8661f989a98092 100644
--- a/ui/android/java/src/org/chromium/ui/autofill/AutofillPopup.java
+++ b/ui/android/java/src/org/chromium/ui/autofill/AutofillPopup.java
@@ -5,17 +5,12 @@
 package org.chromium.ui.autofill;
 
 import android.content.Context;
-import android.graphics.Paint;
-import android.graphics.Rect;
-import android.text.TextUtils;
-import android.view.LayoutInflater;
 import android.view.View;
-import android.view.View.OnLayoutChangeListener;
 import android.widget.AdapterView;
-import android.widget.ListPopupWindow;
-import android.widget.TextView;
 
-import org.chromium.ui.R;
+import org.chromium.ui.DropdownAdapter;
+import org.chromium.ui.DropdownItem;
+import org.chromium.ui.DropdownPopupWindow;
 import org.chromium.ui.base.ViewAndroidDelegate;
 
 import java.util.ArrayList;
@@ -26,7 +21,7 @@ import java.util.List;
 /**
  * The Autofill suggestion popup that lists relevant suggestions.
  */
-public class AutofillPopup extends ListPopupWindow implements AdapterView.OnItemClickListener {
+public class AutofillPopup extends DropdownPopupWindow implements AdapterView.OnItemClickListener {
 
     /**
      * Constants defining types of Autofill suggestion entries.
@@ -40,19 +35,8 @@ public class AutofillPopup extends ListPopupWindow implements AdapterView.OnItem
     private static final int ITEM_ID_SEPARATOR_ENTRY = -3;
     private static final int ITEM_ID_DATA_LIST_ENTRY = -6;
 
-    private static final int TEXT_PADDING_DP = 30;
-
-    private final AutofillPopupDelegate mAutofillCallback;
     private final Context mContext;
-    private final ViewAndroidDelegate mViewAndroidDelegate;
-    private View mAnchorView;
-    private float mAnchorWidth;
-    private float mAnchorHeight;
-    private float mAnchorX;
-    private float mAnchorY;
-    private Paint mLabelViewPaint;
-    private Paint mSublabelViewPaint;
-    private OnLayoutChangeListener mLayoutChangeListener;
+    private final AutofillPopupDelegate mAutofillCallback;
     private List<AutofillSuggestion> mSuggestions;
 
 
@@ -80,67 +64,21 @@ public class AutofillPopup extends ListPopupWindow implements AdapterView.OnItem
      */
     public AutofillPopup(Context context, ViewAndroidDelegate viewAndroidDelegate,
             AutofillPopupDelegate autofillCallback) {
-        super(context, null, 0, R.style.AutofillPopupWindow);
+        super(context, viewAndroidDelegate);
         mContext = context;
-        mViewAndroidDelegate = viewAndroidDelegate;
         mAutofillCallback = autofillCallback;
 
         setOnItemClickListener(this);
-
-        mAnchorView = mViewAndroidDelegate.acquireAnchorView();
-        mAnchorView.setId(R.id.autofill_popup_window);
-        mAnchorView.setTag(this);
-
-        mViewAndroidDelegate.setAnchorViewPosition(mAnchorView, mAnchorX, mAnchorY, mAnchorWidth,
-                mAnchorHeight);
-
-        mLayoutChangeListener = new OnLayoutChangeListener() {
-            @Override
-            public void onLayoutChange(View v, int left, int top, int right, int bottom,
-                    int oldLeft, int oldTop, int oldRight, int oldBottom) {
-                if (v == mAnchorView) AutofillPopup.this.show();
-            }
-        };
-
-        mAnchorView.addOnLayoutChangeListener(mLayoutChangeListener);
-        setAnchorView(mAnchorView);
-    }
-
-    @Override
-    public void show() {
-        // An ugly hack to keep the popup from expanding on top of the keyboard.
-        setInputMethodMode(INPUT_METHOD_NEEDED);
-        super.show();
-        getListView().setDividerHeight(0);
     }
 
     /**
-     * Sets the location and the size of the anchor view that the AutofillPopup will use to attach
-     * itself.
-     * @param x X coordinate of the top left corner of the anchor view.
-     * @param y Y coordinate of the top left corner of the anchor view.
-     * @param width The width of the anchor view.
-     * @param height The height of the anchor view.
-     */
-    public void setAnchorRect(float x, float y, float width, float height) {
-        mAnchorWidth = width;
-        mAnchorHeight = height;
-        mAnchorX = x;
-        mAnchorY = y;
-        if (mAnchorView != null) {
-            mViewAndroidDelegate.setAnchorViewPosition(mAnchorView, mAnchorX, mAnchorY,
-                    mAnchorWidth, mAnchorHeight);
-        }
-    }
-
-    /**
-     * Sets the Autofill suggestions to display in the popup and shows the popup.
+     * Filters the Autofill suggestions to the ones that we support and shows the popup.
      * @param suggestions Autofill suggestion data.
      */
-    public void show(AutofillSuggestion[] suggestions) {
+    public void filterAndShow(AutofillSuggestion[] suggestions) {
         mSuggestions = new ArrayList<AutofillSuggestion>(Arrays.asList(suggestions));
         // Remove the AutofillSuggestions with IDs that are not supported by Android
-        ArrayList<AutofillSuggestion> cleanedData = new ArrayList<AutofillSuggestion>();
+        ArrayList<DropdownItem> cleanedData = new ArrayList<DropdownItem>();
         HashSet<Integer> separators = new HashSet<Integer>();
         for (int i = 0; i < suggestions.length; i++) {
             int itemId = suggestions[i].mUniqueId;
@@ -151,11 +89,8 @@ public class AutofillPopup extends ListPopupWindow implements AdapterView.OnItem
                 separators.add(cleanedData.size());
             }
         }
-        setAdapter(new AutofillListAdapter(mContext, cleanedData, separators));
-        // Once the mAnchorRect is resized and placed correctly, it will show the Autofill popup.
-        mAnchorWidth = Math.max(getDesiredWidth(cleanedData), mAnchorWidth);
-        mViewAndroidDelegate.setAnchorViewPosition(mAnchorView, mAnchorX, mAnchorY, mAnchorWidth,
-                mAnchorHeight);
+        setAdapter(new DropdownAdapter(mContext, cleanedData, separators));
+        show();
     }
 
     /**
@@ -167,61 +102,16 @@ public class AutofillPopup extends ListPopupWindow implements AdapterView.OnItem
     }
 
     /**
-     * Hides the popup and removes the anchor view from the ContainerView.
+     * Hides the popup.
      */
     public void hide() {
         super.dismiss();
-        mAnchorView.removeOnLayoutChangeListener(mLayoutChangeListener);
-        mAnchorView.setTag(null);
-        mViewAndroidDelegate.releaseAnchorView(mAnchorView);
-    }
-
-    /**
-     * Get desired popup window width by calculating the maximum text length from Autofill data.
-     * @param data Autofill suggestion data.
-     * @return The popup window width in DIP.
-     */
-    private float getDesiredWidth(ArrayList<AutofillSuggestion> data) {
-        if (mLabelViewPaint == null || mSublabelViewPaint == null) {
-            LayoutInflater inflater =
-                    (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
-            View layout = inflater.inflate(R.layout.autofill_text, null);
-            TextView labelView = (TextView) layout.findViewById(R.id.autofill_label);
-            mLabelViewPaint = labelView.getPaint();
-            TextView sublabelView = (TextView) layout.findViewById(R.id.autofill_sublabel);
-            mSublabelViewPaint = sublabelView.getPaint();
-        }
-
-        float maxTextWidth = 0;
-        Rect bounds = new Rect();
-        for (int i = 0; i < data.size(); ++i) {
-            bounds.setEmpty();
-            String label = data.get(i).mLabel;
-            if (!TextUtils.isEmpty(label)) {
-                mLabelViewPaint.getTextBounds(label, 0, label.length(), bounds);
-            }
-            float labelWidth = bounds.width();
-
-            bounds.setEmpty();
-            String sublabel = data.get(i).mSublabel;
-            if (!TextUtils.isEmpty(sublabel)) {
-                mSublabelViewPaint.getTextBounds(sublabel, 0, sublabel.length(), bounds);
-            }
-
-            float localMax = Math.max(labelWidth, bounds.width());
-            maxTextWidth = Math.max(maxTextWidth, localMax);
-        }
-        // Scale it down to make it unscaled by screen density.
-        maxTextWidth = maxTextWidth / mContext.getResources().getDisplayMetrics().density;
-        // Adding padding.
-        return maxTextWidth + TEXT_PADDING_DP;
     }
 
     @Override
     public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
-        AutofillListAdapter adapter = (AutofillListAdapter) parent.getAdapter();
-        AutofillSuggestion selectedSuggestion = adapter.getItem(position);
-        int listIndex = mSuggestions.indexOf(selectedSuggestion);
+        DropdownAdapter adapter = (DropdownAdapter) parent.getAdapter();
+        int listIndex = mSuggestions.indexOf(adapter.getItem(position));
         assert listIndex > -1;
         mAutofillCallback.suggestionSelected(listIndex);
     }