kopia lustrzana https://github.com/ryukoposting/Signal-Android
119 wiersze
3.7 KiB
Java
119 wiersze
3.7 KiB
Java
/*
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* Copyright (C) 2015 Twitter, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package org.thoughtcrime.securesms.giph.ui;
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import android.content.Context;
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import android.util.AttributeSet;
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import androidx.appcompat.widget.AppCompatImageView;
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/**
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* AspectRatioImageView maintains an aspect ratio by adjusting the width or height dimension. The
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* aspect ratio (width to height ratio) and adjustment dimension can be configured.
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*/
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public class AspectRatioImageView extends AppCompatImageView {
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private static final float DEFAULT_ASPECT_RATIO = 1.0f;
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private static final int DEFAULT_ADJUST_DIMENSION = 0;
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// defined by attrs.xml enum
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static final int ADJUST_DIMENSION_HEIGHT = 0;
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static final int ADJUST_DIMENSION_WIDTH = 1;
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private double aspectRatio; // width to height ratio
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private int dimensionToAdjust; // ADJUST_DIMENSION_HEIGHT or ADJUST_DIMENSION_WIDTH
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public AspectRatioImageView(Context context) {
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this(context, null);
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}
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public AspectRatioImageView(Context context, AttributeSet attrs) {
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super(context, attrs);
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// final TypedArray a = context.obtainStyledAttributes(attrs,
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// R.styleable.tw__AspectRatioImageView);
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// try {
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// aspectRatio = a.getFloat(R.styleable.tw__AspectRatioImageView_tw__image_aspect_ratio,
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// DEFAULT_ASPECT_RATIO);
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// dimensionToAdjust
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// = a.getInt(R.styleable.tw__AspectRatioImageView_tw__image_dimension_to_adjust,
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// DEFAULT_ADJUST_DIMENSION);
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// } finally {
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// a.recycle();
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// }
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}
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public double getAspectRatio() {
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return aspectRatio;
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}
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public int getDimensionToAdjust() {
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return dimensionToAdjust;
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}
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/**
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* Sets the aspect ratio that should be respected during measurement.
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*
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* @param aspectRatio desired width to height ratio
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*/
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public void setAspectRatio(final double aspectRatio) {
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this.aspectRatio = aspectRatio;
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}
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/**
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* Resets the size to 0.
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*/
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public void resetSize() {
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if (getMeasuredWidth() == 0 && getMeasuredHeight() == 0) {
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return;
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}
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measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.EXACTLY),
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MeasureSpec.makeMeasureSpec(0, MeasureSpec.EXACTLY));
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layout(0, 0, 0, 0);
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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int width = getMeasuredWidth();
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int height = getMeasuredHeight();
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if (dimensionToAdjust == ADJUST_DIMENSION_HEIGHT) {
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height = calculateHeight(width, aspectRatio);
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} else {
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width = calculateWidth(height, aspectRatio);
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}
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setMeasuredDimension(width, height);
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}
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/**
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* Returns the height that will satisfy the width to height aspect ratio, keeping the given
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* width fixed.
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*/
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int calculateHeight(int width, double ratio) {
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if (ratio == 0) {
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return 0;
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}
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return (int) Math.round(width / ratio);
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}
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/**
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* Returns the width that will satisfy the width to height aspect ratio, keeping the given
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* height fixed.
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*/
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int calculateWidth(int height, double ratio) {
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return (int) Math.round(height * ratio);
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}
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} |