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/*
* 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.messaging.ui;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.widget.ScrollView;
import com.android.messaging.R;
/**
* A ScrollView that limits the maximum height that it can take. This is to work around android
* layout's limitation of not having android:maxHeight.
*/
public class MaxHeightScrollView extends ScrollView {
private static final int NO_MAX_HEIGHT = -1;
private final int mMaxHeight;
public MaxHeightScrollView(final Context context, final AttributeSet attrs) {
super(context, attrs);
final TypedArray attr = context.obtainStyledAttributes(attrs,
R.styleable.MaxHeightScrollView, 0, 0);
mMaxHeight = attr.getDimensionPixelSize(R.styleable.MaxHeightScrollView_android_maxHeight,
NO_MAX_HEIGHT);
attr.recycle();
}
@Override
protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (mMaxHeight != NO_MAX_HEIGHT) {
setMeasuredDimension(getMeasuredWidth(), Math.min(getMeasuredHeight(), mMaxHeight));
}
}
}
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