91 lines
2.7 KiB
Kotlin
91 lines
2.7 KiB
Kotlin
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.ext
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import android.graphics.Rect
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import android.os.Build
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import android.view.TouchDelegate
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import android.view.View
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import androidx.annotation.Dimension
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import androidx.annotation.VisibleForTesting
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import androidx.core.view.WindowInsetsCompat
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import mozilla.components.support.ktx.android.util.dpToPx
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fun View.increaseTapArea(extraDps: Int) {
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val dips = extraDps.dpToPx(resources.displayMetrics)
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val parent = this.parent as View
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parent.post {
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val touchRect = Rect()
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getHitRect(touchRect)
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touchRect.inset(-dips, -dips)
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parent.touchDelegate = TouchDelegate(touchRect, this)
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}
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}
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fun View.removeTouchDelegate() {
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val parent = this.parent as View
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parent.post {
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parent.touchDelegate = null
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}
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}
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/**
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* A safer version of [ViewCompat.getRootWindowInsets] that does not throw a NullPointerException
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* if the view is not attached.
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*/
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fun View.getWindowInsets(): WindowInsetsCompat? {
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return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
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rootWindowInsets?.let {
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WindowInsetsCompat.toWindowInsetsCompat(it)
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}
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} else {
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null
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}
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}
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/**
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* Checks if the keyboard is visible
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*
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* Inspired by https://stackoverflow.com/questions/2150078/how-to-check-visibility-of-software-keyboard-in-android
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* API 30 adds a native method for this. We should use it (and a compat method if one
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* is added) when it becomes available
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*/
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fun View.isKeyboardVisible(): Boolean {
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// Since we have insets in M and above, we don't need to guess what the keyboard height is.
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// Otherwise, we make a guess at the minimum height of the keyboard to account for the
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// navigation bar.
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val minimumKeyboardHeight = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
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0
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} else {
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MINIMUM_KEYBOARD_HEIGHT.dpToPx(resources.displayMetrics)
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}
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return getKeyboardHeight() > minimumKeyboardHeight
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}
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@VisibleForTesting
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internal fun View.getWindowVisibleDisplayFrame(): Rect = with(Rect()) {
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getWindowVisibleDisplayFrame(this)
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this
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}
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@VisibleForTesting
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internal fun View.getKeyboardHeight(): Int {
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val windowRect = getWindowVisibleDisplayFrame()
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val statusBarHeight = windowRect.top
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var keyboardHeight = rootView.height - (windowRect.height() + statusBarHeight)
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getWindowInsets()?.let {
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keyboardHeight -= it.stableInsetBottom
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}
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return keyboardHeight
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}
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/**
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* The assumed minimum height of the keyboard.
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*/
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@VisibleForTesting
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@Dimension(unit = Dimension.DP)
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internal const val MINIMUM_KEYBOARD_HEIGHT = 100
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