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      1 /*
      2  * Copyright (C) 2006 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.style;
     18 
     19 import android.graphics.Paint;
     20 import android.graphics.Bitmap;
     21 import android.graphics.Canvas;
     22 import android.graphics.RectF;
     23 import android.text.Spanned;
     24 import android.text.Layout;
     25 
     26 public class IconMarginSpan
     27 implements LeadingMarginSpan, LineHeightSpan
     28 {
     29     public IconMarginSpan(Bitmap b) {
     30         mBitmap = b;
     31     }
     32 
     33     public IconMarginSpan(Bitmap b, int pad) {
     34         mBitmap = b;
     35         mPad = pad;
     36     }
     37 
     38     public int getLeadingMargin(boolean first) {
     39         return mBitmap.getWidth() + mPad;
     40     }
     41 
     42     public void drawLeadingMargin(Canvas c, Paint p, int x, int dir,
     43                                   int top, int baseline, int bottom,
     44                                   CharSequence text, int start, int end,
     45                                   boolean first, Layout layout) {
     46         int st = ((Spanned) text).getSpanStart(this);
     47         int itop = layout.getLineTop(layout.getLineForOffset(st));
     48 
     49         if (dir < 0)
     50             x -= mBitmap.getWidth();
     51 
     52         c.drawBitmap(mBitmap, x, itop, p);
     53     }
     54 
     55     public void chooseHeight(CharSequence text, int start, int end,
     56                              int istartv, int v,
     57                              Paint.FontMetricsInt fm) {
     58         if (end == ((Spanned) text).getSpanEnd(this)) {
     59             int ht = mBitmap.getHeight();
     60 
     61             int need = ht - (v + fm.descent - fm.ascent - istartv);
     62             if (need > 0)
     63                 fm.descent += need;
     64 
     65             need = ht - (v + fm.bottom - fm.top - istartv);
     66             if (need > 0)
     67                 fm.bottom += need;
     68         }
     69     }
     70 
     71     private Bitmap mBitmap;
     72     private int mPad;
     73 }
     74