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/*
* Copyright (C) 2012 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.dialer.util;
import android.content.ContentResolver;
import android.content.Context;
import android.graphics.Paint;
import android.graphics.Point;
import android.os.PowerManager;
import android.provider.Settings;
import android.provider.Settings.Global;
import android.support.annotation.NonNull;
import android.text.TextUtils;
import android.util.TypedValue;
import android.view.Display;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.view.ViewTreeObserver.OnPreDrawListener;
import android.view.WindowManager;
import android.widget.TextView;
import java.util.Locale;
/** Provides static functions to work with views */
public class ViewUtil {
private ViewUtil() {}
/** Similar to {@link Runnable} but takes a View parameter to operate on */
public interface ViewRunnable {
void run(@NonNull View view);
}
/**
* Returns the width as specified in the LayoutParams
*
* @throws IllegalStateException Thrown if the view's width is unknown before a layout pass s
*/
public static int getConstantPreLayoutWidth(View view) {
// We haven't been layed out yet, so get the size from the LayoutParams
final ViewGroup.LayoutParams p = view.getLayoutParams();
if (p.width < 0) {
throw new IllegalStateException(
"Expecting view's width to be a constant rather " + "than a result of the layout pass");
}
return p.width;
}
/**
* Returns a boolean indicating whether or not the view's layout direction is RTL
*
* @param view - A valid view
* @return True if the view's layout direction is RTL
*/
public static boolean isViewLayoutRtl(View view) {
return view.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL;
}
public static boolean isRtl() {
return TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()) == View.LAYOUT_DIRECTION_RTL;
}
public static void resizeText(TextView textView, int originalTextSize, int minTextSize) {
final Paint paint = textView.getPaint();
final int width = textView.getWidth();
if (width == 0) {
return;
}
textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, originalTextSize);
float ratio = width / paint.measureText(textView.getText().toString());
if (ratio <= 1.0f) {
textView.setTextSize(
TypedValue.COMPLEX_UNIT_PX, Math.max(minTextSize, originalTextSize * ratio));
}
}
/** Runs a piece of code just before the next draw, after layout and measurement */
public static void doOnPreDraw(
@NonNull final View view, final boolean drawNextFrame, final Runnable runnable) {
view.getViewTreeObserver()
.addOnPreDrawListener(
new OnPreDrawListener() {
@Override
public boolean onPreDraw() {
view.getViewTreeObserver().removeOnPreDrawListener(this);
runnable.run();
return drawNextFrame;
}
});
}
public static void doOnPreDraw(
@NonNull final View view, final boolean drawNextFrame, final ViewRunnable runnable) {
view.getViewTreeObserver()
.addOnPreDrawListener(
new OnPreDrawListener() {
@Override
public boolean onPreDraw() {
view.getViewTreeObserver().removeOnPreDrawListener(this);
runnable.run(view);
return drawNextFrame;
}
});
}
public static void doOnGlobalLayout(@NonNull final View view, final ViewRunnable runnable) {
view.getViewTreeObserver()
.addOnGlobalLayoutListener(
new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
runnable.run(view);
}
});
}
/**
* Returns {@code true} if animations should be disabled.
*
* <p>Animations should be disabled if {@link
* android.provider.Settings.Global#ANIMATOR_DURATION_SCALE} is set to 0 through system settings
* or the device is in power save mode.
*/
public static boolean areAnimationsDisabled(Context context) {
ContentResolver contentResolver = context.getContentResolver();
PowerManager powerManager = context.getSystemService(PowerManager.class);
return Settings.Global.getFloat(contentResolver, Global.ANIMATOR_DURATION_SCALE, 1.0f) == 0
|| powerManager.isPowerSaveMode();
}
/**
* Get navigation bar height by calculating difference between app usable size and real screen
* size. Note that this won't work in multi-window mode so it's caller's responsibility to check
* if the app is in multi-window mode before using this.
*
* @param context Context
* @return Navigation bar height
*/
public static int getNavigationBarHeight(Context context) {
WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display = windowManager.getDefaultDisplay();
Point appUsableSize = getAppUsableScreenSize(display);
Point realScreenSize = getRealScreenSize(display);
// Navigation bar on the right.
if (appUsableSize.x < realScreenSize.x) {
return appUsableSize.y;
}
// Navigation bar at the bottom.
if (appUsableSize.y < realScreenSize.y) {
return realScreenSize.y - appUsableSize.y;
}
// Navigation bar is not present.
return 0;
}
private static Point getAppUsableScreenSize(Display display) {
Point size = new Point();
display.getSize(size);
return size;
}
private static Point getRealScreenSize(Display display) {
Point size = new Point();
display.getRealSize(size);
return size;
}
}
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