1 files changed, 77 insertions, 0 deletions
diff --git a/tuner/src/com/android/tv/tuner/cc/CaptionLayout.java b/tuner/src/com/android/tv/tuner/cc/CaptionLayout.java
new file mode 100644
index 00000000..eb9ad463
--- /dev/null
+++ b/tuner/src/com/android/tv/tuner/cc/CaptionLayout.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2015 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.tv.tuner.cc;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import com.android.tv.tuner.data.nano.Track.AtscCaptionTrack;
+import com.android.tv.tuner.layout.ScaledLayout;
+
+/**
+ * Layout containing the safe title area that helps the closed captions look more prominent. This is
+ * required by CEA-708B.
+ */
+public class CaptionLayout extends ScaledLayout {
+    // The safe title area has 10% margins of the screen.
+    private static final float SAFE_TITLE_AREA_SCALE_START_X = 0.1f;
+    private static final float SAFE_TITLE_AREA_SCALE_END_X = 0.9f;
+    private static final float SAFE_TITLE_AREA_SCALE_START_Y = 0.1f;
+    private static final float SAFE_TITLE_AREA_SCALE_END_Y = 0.9f;
+
+    private final ScaledLayout mSafeTitleAreaLayout;
+    private AtscCaptionTrack mCaptionTrack;
+
+    public CaptionLayout(Context context) {
+        this(context, null);
+    }
+
+    public CaptionLayout(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public CaptionLayout(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        mSafeTitleAreaLayout = new ScaledLayout(context);
+        addView(
+                mSafeTitleAreaLayout,
+                new ScaledLayoutParams(
+                        SAFE_TITLE_AREA_SCALE_START_X, SAFE_TITLE_AREA_SCALE_END_X,
+                        SAFE_TITLE_AREA_SCALE_START_Y, SAFE_TITLE_AREA_SCALE_END_Y));
+    }
+
+    public void addOrUpdateViewToSafeTitleArea(
+            CaptionWindowLayout captionWindowLayout, ScaledLayoutParams scaledLayoutParams) {
+        int index = mSafeTitleAreaLayout.indexOfChild(captionWindowLayout);
+        if (index < 0) {
+            mSafeTitleAreaLayout.addView(captionWindowLayout, scaledLayoutParams);
+            return;
+        }
+        mSafeTitleAreaLayout.updateViewLayout(captionWindowLayout, scaledLayoutParams);
+    }
+
+    public void removeViewFromSafeTitleArea(CaptionWindowLayout captionWindowLayout) {
+        mSafeTitleAreaLayout.removeView(captionWindowLayout);
+    }
+
+    public void setCaptionTrack(AtscCaptionTrack captionTrack) {
+        mCaptionTrack = captionTrack;
+    }
+
+    public AtscCaptionTrack getCaptionTrack() {
+        return mCaptionTrack;
+    }
+}