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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.text;
     18 
     19 import android.annotation.NonNull;
     20 import android.text.StaticLayout.LineBreaks;
     21 
     22 import java.util.Collections;
     23 import java.util.List;
     24 
     25 // Based on the native implementation of LineBreaker in
     26 // frameworks/base/core/jni/android_text_StaticLayout.cpp revision b808260
     27 public abstract class LineBreaker {
     28 
     29     protected static final int TAB_MASK   = 0x20000000;  // keep in sync with StaticLayout
     30 
     31     protected final @NonNull List<Primitive> mPrimitives;
     32     protected final @NonNull LineWidth mLineWidth;
     33     protected final @NonNull TabStops mTabStops;
     34 
     35     public LineBreaker(@NonNull List<Primitive> primitives, @NonNull LineWidth lineWidth,
     36             @NonNull TabStops tabStops) {
     37         mPrimitives = Collections.unmodifiableList(primitives);
     38         mLineWidth = lineWidth;
     39         mTabStops = tabStops;
     40     }
     41 
     42     public abstract void computeBreaks(@NonNull LineBreaks breakInfo);
     43 }
     44