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/*
* Copyright (C) 2022 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 android.view.animation;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Insets;
import android.util.AttributeSet;
/**
* An animation that controls the outset of an object.
*
* @hide
*/
public class ExtendAnimation extends Animation {
protected Insets mFromInsets = Insets.NONE;
protected Insets mToInsets = Insets.NONE;
private int mFromLeftType = ABSOLUTE;
private int mFromTopType = ABSOLUTE;
private int mFromRightType = ABSOLUTE;
private int mFromBottomType = ABSOLUTE;
private int mToLeftType = ABSOLUTE;
private int mToTopType = ABSOLUTE;
private int mToRightType = ABSOLUTE;
private int mToBottomType = ABSOLUTE;
private float mFromLeftValue;
private float mFromTopValue;
private float mFromRightValue;
private float mFromBottomValue;
private float mToLeftValue;
private float mToTopValue;
private float mToRightValue;
private float mToBottomValue;
/**
* Constructor used when an ExtendAnimation is loaded from a resource.
*
* @param context Application context to use
* @param attrs Attribute set from which to read values
*/
public ExtendAnimation(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray a = context.obtainStyledAttributes(attrs,
com.android.internal.R.styleable.ExtendAnimation);
Description d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ExtendAnimation_fromExtendLeft), context);
mFromLeftType = d.type;
mFromLeftValue = d.value;
d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ExtendAnimation_fromExtendTop), context);
mFromTopType = d.type;
mFromTopValue = d.value;
d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ExtendAnimation_fromExtendRight), context);
mFromRightType = d.type;
mFromRightValue = d.value;
d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ExtendAnimation_fromExtendBottom), context);
mFromBottomType = d.type;
mFromBottomValue = d.value;
d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ExtendAnimation_toExtendLeft), context);
mToLeftType = d.type;
mToLeftValue = d.value;
d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ExtendAnimation_toExtendTop), context);
mToTopType = d.type;
mToTopValue = d.value;
d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ExtendAnimation_toExtendRight), context);
mToRightType = d.type;
mToRightValue = d.value;
d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ExtendAnimation_toExtendBottom), context);
mToBottomType = d.type;
mToBottomValue = d.value;
a.recycle();
}
/**
* Constructor to use when building an ExtendAnimation from code
*
* @param fromInsets the insets to animate from
* @param toInsets the insets to animate to
*/
public ExtendAnimation(Insets fromInsets, Insets toInsets) {
if (fromInsets == null || toInsets == null) {
throw new RuntimeException("Expected non-null animation outsets");
}
mFromLeftValue = -fromInsets.left;
mFromTopValue = -fromInsets.top;
mFromRightValue = -fromInsets.right;
mFromBottomValue = -fromInsets.bottom;
mToLeftValue = -toInsets.left;
mToTopValue = -toInsets.top;
mToRightValue = -toInsets.right;
mToBottomValue = -toInsets.bottom;
}
/**
* Constructor to use when building an ExtendAnimation from code
*/
public ExtendAnimation(int fromL, int fromT, int fromR, int fromB,
int toL, int toT, int toR, int toB) {
this(Insets.of(-fromL, -fromT, -fromR, -fromB), Insets.of(-toL, -toT, -toR, -toB));
}
@Override
protected void applyTransformation(float it, Transformation tr) {
int l = mFromInsets.left + (int) ((mToInsets.left - mFromInsets.left) * it);
int t = mFromInsets.top + (int) ((mToInsets.top - mFromInsets.top) * it);
int r = mFromInsets.right + (int) ((mToInsets.right - mFromInsets.right) * it);
int b = mFromInsets.bottom + (int) ((mToInsets.bottom - mFromInsets.bottom) * it);
tr.setInsets(l, t, r, b);
}
@Override
public boolean willChangeTransformationMatrix() {
return false;
}
/** @hide */
@Override
public boolean hasExtension() {
return mFromInsets.left < 0 || mFromInsets.top < 0 || mFromInsets.right < 0
|| mFromInsets.bottom < 0;
}
@Override
public void initialize(int width, int height, int parentWidth, int parentHeight) {
super.initialize(width, height, parentWidth, parentHeight);
// We remove any negative extension (i.e. positive insets) and set those to 0
mFromInsets = Insets.min(Insets.of(
-(int) resolveSize(mFromLeftType, mFromLeftValue, width, parentWidth),
-(int) resolveSize(mFromTopType, mFromTopValue, height, parentHeight),
-(int) resolveSize(mFromRightType, mFromRightValue, width, parentWidth),
-(int) resolveSize(mFromBottomType, mFromBottomValue, height, parentHeight)
), Insets.NONE);
mToInsets = Insets.min(Insets.of(
-(int) resolveSize(mToLeftType, mToLeftValue, width, parentWidth),
-(int) resolveSize(mToTopType, mToTopValue, height, parentHeight),
-(int) resolveSize(mToRightType, mToRightValue, width, parentWidth),
-(int) resolveSize(mToBottomType, mToBottomValue, height, parentHeight)
), Insets.NONE);
}
}
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