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      1 /*
      2  * Copyright (C) 2008 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.graphics.Canvas;
     20 import android.graphics.Paint;
     21 
     22 /**
     23  * Please implement this interface if your CharSequence can do quick
     24  * draw/measure/widths calculations from an internal array.
     25  * {@hide}
     26  */
     27 public interface GraphicsOperations
     28 extends CharSequence
     29 {
     30     /**
     31      * Just like {@link Canvas#drawText}.
     32      */
     33     void drawText(Canvas c, int start, int end,
     34                          float x, float y, Paint p);
     35 
     36     /**
     37      * Just like {@link Canvas#drawTextRun}.
     38      * {@hide}
     39      */
     40     void drawTextRun(Canvas c, int start, int end, int contextStart, int contextEnd,
     41             float x, float y, int flags, Paint p);
     42 
     43    /**
     44      * Just like {@link Paint#measureText}.
     45      */
     46     float measureText(int start, int end, Paint p);
     47 
     48     /**
     49      * Just like {@link Paint#getTextWidths}.
     50      */
     51     public int getTextWidths(int start, int end, float[] widths, Paint p);
     52 
     53     /**
     54      * Just like {@link Paint#getTextRunAdvances}.
     55      * @hide
     56      */
     57     float getTextRunAdvances(int start, int end, int contextStart, int contextEnd,
     58             int flags, float[] advances, int advancesIndex, Paint paint);
     59 
     60     /**
     61      * Just like {@link Paint#getTextRunCursor}.
     62      * @hide
     63      */
     64     int getTextRunCursor(int contextStart, int contextEnd, int flags, int offset,
     65             int cursorOpt, Paint p);
     66 }
     67