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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 com.android.launcher3;
     18 
     19 import android.graphics.Canvas;
     20 import android.graphics.ColorFilter;
     21 import android.graphics.Rect;
     22 import android.graphics.drawable.Drawable;
     23 
     24 public class BorderCropDrawable extends Drawable {
     25 
     26     private final Drawable mChild;
     27     private final Rect mBoundsShift;
     28     private final Rect mPadding;
     29 
     30     BorderCropDrawable(Drawable child, boolean cropLeft,
     31             boolean cropTop, boolean cropRight, boolean cropBottom) {
     32         mChild = child;
     33 
     34         mBoundsShift = new Rect();
     35         mPadding = new Rect();
     36         mChild.getPadding(mPadding);
     37 
     38         if (cropLeft) {
     39             mBoundsShift.left = -mPadding.left;
     40             mPadding.left = 0;
     41         }
     42         if (cropTop) {
     43             mBoundsShift.top = -mPadding.top;
     44             mPadding.top = 0;
     45         }
     46         if (cropRight) {
     47             mBoundsShift.right = mPadding.right;
     48             mPadding.right = 0;
     49         }
     50         if (cropBottom) {
     51             mBoundsShift.bottom = mPadding.bottom;
     52             mPadding.bottom = 0;
     53         }
     54     }
     55 
     56     @Override
     57     protected void onBoundsChange(Rect bounds) {
     58         mChild.setBounds(
     59                 bounds.left + mBoundsShift.left,
     60                 bounds.top + mBoundsShift.top,
     61                 bounds.right + mBoundsShift.right,
     62                 bounds.bottom + mBoundsShift.bottom);
     63     }
     64 
     65     @Override
     66     public boolean getPadding(Rect padding) {
     67         padding.set(mPadding);
     68         return (padding.left | padding.top | padding.right | padding.bottom) != 0;
     69     }
     70 
     71     @Override
     72     public void draw(Canvas canvas) {
     73         mChild.draw(canvas);
     74     }
     75 
     76     @Override
     77     public int getOpacity() {
     78         return mChild.getOpacity();
     79     }
     80 
     81     @Override
     82     public void setAlpha(int alpha) {
     83         mChild.setAlpha(alpha);
     84     }
     85 
     86     @Override
     87     public void setColorFilter(ColorFilter cf) {
     88         mChild.setColorFilter(cf);
     89     }
     90 }
     91