Bug 855016 - Make the more-text links on about:home sections focusable and gamepad-actionable. r=sriram

mobile/android/base/AboutHomeSection.java

@@ -4,6 +4,8 @@
 
 package org.mozilla.gecko;
 
+import org.mozilla.gecko.util.GamepadUtils;
+
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.text.TextUtils;
@@ -73,6 +75,7 @@ public class AboutHomeSection extends GeckoLinearLayout {
 
     public void setOnMoreTextClickListener(View.OnClickListener listener) {
         mMoreText.setOnClickListener(listener);
+        mMoreText.setOnKeyListener(GamepadUtils.getClickDispatcher());
     }
 
     public void addItem(View item) {

mobile/android/base/LinkTextView.java

@@ -5,14 +5,20 @@
 package org.mozilla.gecko;
 
 import android.content.Context;
+import android.graphics.Rect;
 import android.text.SpannableString;
+import android.text.style.BackgroundColorSpan;
 import android.text.style.UnderlineSpan;
 import android.util.AttributeSet;
 import android.widget.TextView;
 
 public class LinkTextView extends TextView {
+    private final BackgroundColorSpan mFocusBackgroundSpan;
+    private boolean mFocusApplied;
+
     public LinkTextView(Context context, AttributeSet attrs) {
         super(context, attrs);
+        mFocusBackgroundSpan = new BackgroundColorSpan(context.getResources().getColor(R.color.highlight_focused));
     }
 
     @Override
@@ -22,4 +28,24 @@ public class LinkTextView extends TextView {
 
         super.setText(content, BufferType.SPANNABLE);
     }
+
+    @Override
+    public void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
+        super.onFocusChanged(focused, direction, previouslyFocusedRect);
+
+        if (focused == mFocusApplied) {
+            return;
+        }
+        mFocusApplied = focused;
+
+        CharSequence text = getText();
+        if (text instanceof SpannableString) {
+            SpannableString spannable = (SpannableString)text;
+            if (focused) {
+                spannable.setSpan(mFocusBackgroundSpan, 0, text.length(), 0);
+            } else {
+                spannable.removeSpan(mFocusBackgroundSpan);
+            }
+        }
+    }
 }

mobile/android/base/resources/layout/abouthome_section.xml

@@ -40,6 +40,6 @@
                                     android:textColor="@color/abouthome_section_more_text"
                                     android:textSize="12sp"
                                     android:gravity="center"
-                                    android:duplicateParentState="true"/>
+                                    android:focusable="true"/>
 
 </merge>