Compose singleLine & textAllCaps transforms

TextView only supports a single TransformationMethod per TextView, and
singleLine and textAllCaps are both implemented as
TransformationMethods. Composing both operations into a single
TransformationMethod gives us all-caps text (if requested by
kg_use_all_caps) on a single line.

Bug: 11421105
Change-Id: I069721b887ea90b8daf2af2cf82081319e499962

2 files changed, 28 insertions, 3 deletions

diff --git a/packages/Keyguard/res/layout/keyguard_emergency_carrier_area.xml b/packages/Keyguard/res/layout/keyguard_emergency_carrier_area.xml
index 8be15cb..b4847f0 100644
--- a/packages/Keyguard/res/layout/keyguard_emergency_carrier_area.xml
+++ b/packages/Keyguard/res/layout/keyguard_emergency_carrier_area.xml
@@ -32,12 +32,10 @@
         android:id="@+id/carrier_text"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:singleLine="true"
         android:ellipsize="marquee"
         android:textAppearance="?android:attr/textAppearanceMedium"
         android:textSize="@dimen/kg_status_line_font_size"
-        android:textColor="?android:attr/textColorSecondary"
-        android:textAllCaps="@bool/kg_use_all_caps" />
+        android:textColor="?android:attr/textColorSecondary" />
 
     <LinearLayout
         android:layout_width="match_parent"
diff --git a/packages/Keyguard/src/com/android/keyguard/CarrierText.java b/packages/Keyguard/src/com/android/keyguard/CarrierText.java
index c33f174..88558cd 100644
--- a/packages/Keyguard/src/com/android/keyguard/CarrierText.java
+++ b/packages/Keyguard/src/com/android/keyguard/CarrierText.java
@@ -17,14 +17,18 @@
 package com.android.keyguard;
 
 import android.content.Context;
+import android.text.method.SingleLineTransformationMethod;
 import android.text.TextUtils;
 import android.util.AttributeSet;
+import android.view.View;
 import android.widget.TextView;
 
 import com.android.internal.telephony.IccCardConstants;
 import com.android.internal.telephony.IccCardConstants.State;
 import com.android.internal.widget.LockPatternUtils;
 
+import java.util.Locale;
+
 public class CarrierText extends TextView {
     private static CharSequence mSeparator;
 
@@ -77,6 +81,8 @@ public class CarrierText extends TextView {
     public CarrierText(Context context, AttributeSet attrs) {
         super(context, attrs);
         mLockPatternUtils = new LockPatternUtils(mContext);
+        boolean useAllCaps = mContext.getResources().getBoolean(R.bool.kg_use_all_caps);
+        setTransformationMethod(new CarrierTextTransformationMethod(mContext, useAllCaps));
     }
 
     protected void updateCarrierText(State simState, CharSequence plmn, CharSequence spn) {
@@ -258,4 +264,25 @@ public class CarrierText extends TextView {
 
         return mContext.getText(carrierHelpTextId);
     }
+
+    private class CarrierTextTransformationMethod extends SingleLineTransformationMethod {
+        private final Locale mLocale;
+        private final boolean mAllCaps;
+
+        public CarrierTextTransformationMethod(Context context, boolean allCaps) {
+            mLocale = context.getResources().getConfiguration().locale;
+            mAllCaps = allCaps;
+        }
+
+        @Override
+        public CharSequence getTransformation(CharSequence source, View view) {
+            source = super.getTransformation(source, view);
+
+            if (mAllCaps && source != null) {
+                source = source.toString().toUpperCase(mLocale);
+            }
+
+            return source;
+        }
+    }
 }