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/*
* Copyright (C) 2016 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.google.android.setupdesign.view;
import static java.lang.Math.min;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Rect;
import android.os.Build;
import android.os.Build.VERSION_CODES;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.ViewGroup;
import android.view.WindowInsets;
import android.widget.FrameLayout;
import androidx.annotation.VisibleForTesting;
import com.google.android.setupcompat.partnerconfig.PartnerConfig;
import com.google.android.setupcompat.partnerconfig.PartnerConfigHelper;
import com.google.android.setupcompat.util.BuildCompatUtils;
import com.google.android.setupdesign.R;
/**
* A FrameLayout subclass that has an "intrinsic size", which is the size it wants to be if that is
* within the constraints given by the parent. The intrinsic size can be set with the {@code
* android:width} and {@code android:height} attributes in XML.
*
* <p>Note that for the intrinsic size to be meaningful, {@code android:layout_width} and/or {@code
* android:layout_height} will need to be {@code wrap_content}.
*/
public class IntrinsicSizeFrameLayout extends FrameLayout {
private int intrinsicHeight = 0;
private int intrinsicWidth = 0;
private Object lastInsets; // Use generic Object type for compatibility
// Define here to avoid allocating resource during layout/draw operation.
private final Rect windowVisibleDisplayRect = new Rect();
public IntrinsicSizeFrameLayout(Context context) {
super(context);
init(context, null, 0);
}
public IntrinsicSizeFrameLayout(Context context, AttributeSet attrs) {
super(context, attrs);
init(context, attrs, 0);
}
@TargetApi(VERSION_CODES.HONEYCOMB)
public IntrinsicSizeFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs, defStyleAttr);
}
private void init(Context context, AttributeSet attrs, int defStyleAttr) {
if (isInEditMode()) {
return;
}
final TypedArray a =
context.obtainStyledAttributes(
attrs, R.styleable.SudIntrinsicSizeFrameLayout, defStyleAttr, 0);
intrinsicHeight =
a.getDimensionPixelSize(R.styleable.SudIntrinsicSizeFrameLayout_android_height, 0);
intrinsicWidth =
a.getDimensionPixelSize(R.styleable.SudIntrinsicSizeFrameLayout_android_width, 0);
a.recycle();
if (BuildCompatUtils.isAtLeastS()) {
if (PartnerConfigHelper.get(context)
.isPartnerConfigAvailable(PartnerConfig.CONFIG_CARD_VIEW_INTRINSIC_HEIGHT)) {
intrinsicHeight =
(int)
PartnerConfigHelper.get(context)
.getDimension(context, PartnerConfig.CONFIG_CARD_VIEW_INTRINSIC_HEIGHT);
}
if (PartnerConfigHelper.get(context)
.isPartnerConfigAvailable(PartnerConfig.CONFIG_CARD_VIEW_INTRINSIC_WIDTH)) {
intrinsicWidth =
(int)
PartnerConfigHelper.get(context)
.getDimension(context, PartnerConfig.CONFIG_CARD_VIEW_INTRINSIC_WIDTH);
}
}
}
@Override
public void setLayoutParams(ViewGroup.LayoutParams params) {
if (BuildCompatUtils.isAtLeastS()) {
// When both intrinsic height and width are 0, the card view style would be removed from
// foldable/tablet layout. It must set the layout width and height to MATCH_PARENT and then it
// can ignore the IntrinsicSizeFrameLayout from the foldable/tablet layout.
if (intrinsicHeight == 0 && intrinsicWidth == 0) {
params.width = ViewGroup.LayoutParams.MATCH_PARENT;
params.height = ViewGroup.LayoutParams.MATCH_PARENT;
}
}
super.setLayoutParams(params);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int measureWidth;
// The the content may be truncated if the layout show in multi-window mode or two pane mode,
// because the given width is fixed size which based on the display to compute. So the width
// the content may be truncated. Make the layout width align window while window width smaller
// than display size.
if (isWindowSizeSmallerThanDisplaySize()) {
getWindowVisibleDisplayFrame(windowVisibleDisplayRect);
measureWidth =
MeasureSpec.makeMeasureSpec(windowVisibleDisplayRect.width(), MeasureSpec.EXACTLY);
} else {
measureWidth = getIntrinsicMeasureSpec(widthMeasureSpec, intrinsicWidth);
}
super.onMeasure(measureWidth, getIntrinsicMeasureSpec(heightMeasureSpec, intrinsicHeight));
}
@VisibleForTesting
boolean isWindowSizeSmallerThanDisplaySize() {
boolean result = false;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
getWindowVisibleDisplayFrame(windowVisibleDisplayRect);
Display display = getDisplay();
if (display != null) {
DisplayMetrics displayMetrics = new DisplayMetrics();
display.getRealMetrics(displayMetrics);
if (windowVisibleDisplayRect.width() > 0
&& windowVisibleDisplayRect.width() < displayMetrics.widthPixels) {
result = true;
}
}
}
return result;
}
private int getIntrinsicMeasureSpec(int measureSpec, int intrinsicSize) {
if (intrinsicSize <= 0) {
// Intrinsic size is not set, just return the original spec
return measureSpec;
}
final int mode = MeasureSpec.getMode(measureSpec);
final int size = MeasureSpec.getSize(measureSpec);
if (mode == MeasureSpec.UNSPECIFIED) {
// Parent did not give any constraint, so we'll be the intrinsic size
return MeasureSpec.makeMeasureSpec(intrinsicHeight, MeasureSpec.EXACTLY);
} else if (mode == MeasureSpec.AT_MOST) {
// If intrinsic size is within parents constraint, take the intrinsic size.
// Otherwise take the parents size because that's closest to the intrinsic size.
return MeasureSpec.makeMeasureSpec(min(size, intrinsicHeight), MeasureSpec.EXACTLY);
}
// Parent specified EXACTLY, or in all other cases, just return the original spec
return measureSpec;
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
if (Build.VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
if (lastInsets == null) {
requestApplyInsets();
}
}
}
@Override
public WindowInsets onApplyWindowInsets(WindowInsets insets) {
lastInsets = insets;
return super.onApplyWindowInsets(insets);
}
}
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