2 * Copyright 2019-2023 Soren Stoutner <soren@stoutner.com>.
4 * This file is part of Privacy Browser Android <https://www.stoutner.com/privacy-browser-android>.
6 * Privacy Browser Android is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * Privacy Browser Android is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Privacy Browser Android. If not, see <http://www.gnu.org/licenses/>.
20 package com.stoutner.privacybrowser.views
22 import android.animation.ObjectAnimator
23 import android.annotation.SuppressLint
24 import android.content.Context
25 import android.graphics.Bitmap
26 import android.graphics.drawable.BitmapDrawable
27 import android.os.Bundle
28 import android.util.AttributeSet
29 import android.view.MotionEvent
30 import android.webkit.HttpAuthHandler
31 import android.webkit.SslErrorHandler
32 import android.webkit.WebView
34 import androidx.appcompat.content.res.AppCompatResources.getDrawable
35 import androidx.core.view.NestedScrollingChild2
36 import androidx.core.view.NestedScrollingChildHelper
37 import androidx.core.view.ViewCompat
39 import com.stoutner.privacybrowser.R
40 import com.stoutner.privacybrowser.activities.MainWebViewActivity
42 import java.util.Collections
45 import kotlin.collections.ArrayList
47 import kotlin.jvm.JvmOverloads
49 // Define the saved state constants.
50 private const val DOMAIN_SETTINGS_APPLIED = "domain_settings_applied"
51 private const val DOMAIN_SETTINGS_DATABASE_ID = "domain_settings_database_id"
52 private const val CURRENT_DOMAIN_NAME = "current_domain_name"
53 private const val CURRENT_URl = "current_url"
54 private const val ACCEPT_COOKIES = "accept_cookies"
55 private const val EASYLIST_ENABLED = "easylist_enabled"
56 private const val EASYPRIVACY_ENABLED = "easyprivacy_enabled"
57 private const val FANBOYS_ANNOYANCE_LIST_ENABLED = "fanboys_annoyance_list_enabled"
58 private const val FANBOYS_SOCIAL_BLOCKING_LIST_ENABLED = "fanboys_social_blocking_list_enabled"
59 private const val ULTRALIST_ENABLED = "ultralist_enabled"
60 private const val ULTRAPRIVACY_ENABLED = "ultraprivacy_enabled"
61 private const val BLOCK_ALL_THIRD_PARTY_REQUESTS = "block_all_third_party_requests"
62 private const val HAS_PINNED_SSL_CERTIFICATE = "has_pinned_ssl_certificate"
63 private const val PINNED_SSL_ISSUED_TO_CNAME = "pinned_ssl_issued_to_cname"
64 private const val PINNED_SSL_ISSUED_TO_ONAME = "pinned_ssl_issued_to_oname"
65 private const val PINNED_SSL_ISSUED_TO_UNAME = "pinned_ssl_issued_to_uname"
66 private const val PINNED_SSL_ISSUED_BY_CNAME = "pinned_ssl_issued_by_cname"
67 private const val PINNED_SSL_ISSUED_BY_ONAME = "pinned_ssl_issued_by_oname"
68 private const val PINNED_SSL_ISSUED_BY_UNAME = "pinned_ssl_issued_by_uname"
69 private const val PINNED_SSL_START_DATE = "pinned_ssl_start_date"
70 private const val PINNED_SSL_END_DATE = "pinned_ssl_end_date"
71 private const val PINNED_IP_ADDRESSES = "pinned_ip_addresses"
72 private const val IGNORE_PINNED_DOMAIN_INFORMATION = "ignore_pinned_domain_information"
73 private const val SWIPE_TO_REFRESH = "swipe_to_refresh"
74 private const val JAVASCRIPT_ENABLED = "javascript_enabled"
75 private const val DOM_STORAGE_ENABLED = "dom_storage_enabled"
76 private const val USER_AGENT = "user_agent"
77 private const val WIDE_VIEWPORT = "wide_viewport"
78 private const val FONT_SIZE = "font_size"
80 // NestedScrollWebView extends WebView to handle nested scrolls (scrolling the app bar off the screen). It also stores extra information about the state of the WebView used by Privacy Browser.
81 class NestedScrollWebView @JvmOverloads constructor(context: Context, attributeSet: AttributeSet? = null, defaultStyle: Int = android.R.attr.webViewStyle) : WebView(context, attributeSet, defaultStyle),
82 NestedScrollingChild2 {
84 // Define the public companion object constants. These can be moved to public class constants once the entire project has migrated to Kotlin.
85 const val BLOCKED_REQUESTS = 0
86 const val EASYLIST = 1
87 const val EASYPRIVACY = 2
88 const val FANBOYS_ANNOYANCE_LIST = 3
89 const val FANBOYS_SOCIAL_BLOCKING_LIST = 4
90 const val ULTRALIST = 5
91 const val ULTRAPRIVACY = 6
92 const val THIRD_PARTY_REQUESTS = 7
95 // Define the public variables.
96 var acceptCookies = false
97 var blockAllThirdPartyRequests = false
98 var currentDomainName = ""
99 var currentIpAddresses = ""
101 var domainSettingsApplied = false
102 var domainSettingsDatabaseId = 0
103 var easyListEnabled = true
104 var easyPrivacyEnabled = true
105 var fanboysAnnoyanceListEnabled = true
106 var fanboysSocialBlockingListEnabled = true
107 var httpAuthHandler: HttpAuthHandler? = null
108 var ignorePinnedDomainInformation = false
109 var pinnedIpAddresses = ""
110 var sslErrorHandler: SslErrorHandler? = null
111 var swipeToRefresh = false
112 var ultraListEnabled = true
113 var ultraPrivacyEnabled = true
114 var waitingForProxyUrlString = ""
115 var webViewFragmentId: Long = 0
118 // Define the private variables.
119 private val nestedScrollingChildHelper: NestedScrollingChildHelper = NestedScrollingChildHelper(this)
120 private lateinit var favoriteIcon: Bitmap
121 private var favoriteIconHeight = 0
122 private var previousYPosition = 0 // The previous Y position needs to be tracked between motion events.
123 private var hasPinnedSslCertificate = false
124 private var pinnedSslIssuedToCName = ""
125 private var pinnedSslIssuedToOName = ""
126 private var pinnedSslIssuedToUName = ""
127 private var pinnedSslIssuedByCName = ""
128 private var pinnedSslIssuedByOName = ""
129 private var pinnedSslIssuedByUName = ""
130 private var pinnedSslStartDate = Date(0)
131 private var pinnedSslEndDate = Date(0)
132 private val resourceRequests = Collections.synchronizedList(ArrayList<Array<String>>()) // Using a synchronized list makes adding resource requests thread safe.
133 private var blockedRequests = 0
134 private var easyListBlockedRequests = 0
135 private var easyPrivacyBlockedRequests = 0
136 private var fanboysAnnoyanceListBlockedRequests = 0
137 private var fanboysSocialBlockingListBlockedRequests = 0
138 private var ultraListBlockedRequests = 0
139 private var ultraPrivacyBlockedRequests = 0
140 private var thirdPartyBlockedRequests = 0
143 // Enable nested scrolling by default.
144 nestedScrollingChildHelper.isNestedScrollingEnabled = true
146 // Initialize the favorite icon.
147 initializeFavoriteIcon()
151 // Favorite or default icon.
152 fun initializeFavoriteIcon() {
153 // Get the default favorite icon drawable.
154 val favoriteIconDrawable = getDrawable(context, R.drawable.world)
156 // Cast the favorite icon drawable to a bitmap drawable.
157 val favoriteIconBitmapDrawable = (favoriteIconDrawable as BitmapDrawable?)!!
159 // Store the default icon bitmap.
160 favoriteIcon = favoriteIconBitmapDrawable.bitmap
162 // Set the favorite icon height to be 0. This way any favorite icons presented by the website will overwrite it.
163 favoriteIconHeight = 0
166 fun setFavoriteIcon(icon: Bitmap) {
167 // Store the current favorite icon height.
168 favoriteIconHeight = icon.height
170 // Scale the favorite icon bitmap down if it is larger than 256 x 256. Filtering uses bilinear interpolation.
171 favoriteIcon = if (icon.height > 256 || icon.width > 256) {
172 Bitmap.createScaledBitmap(icon, 256, 256, true)
174 // Store the icon as presented.
179 fun getFavoriteIcon(): Bitmap {
180 // Return the favorite icon. This is the only way to return a non-nullable variable while retaining the custom initialization and setter functions above.
184 fun getFavoriteIconHeight(): Int {
185 // Return the favorite icon height.
186 return favoriteIconHeight
189 // Reset the handlers.
190 fun resetSslErrorHandler() {
191 // Reset the current SSL error handler.
192 sslErrorHandler = null
195 fun resetHttpAuthHandler() {
196 // Reset the current HTTP authentication handler.
197 httpAuthHandler = null
201 // Pinned SSL certificates.
202 fun hasPinnedSslCertificate(): Boolean {
203 // Return the status of the pinned SSL certificate.
204 return hasPinnedSslCertificate
207 fun setPinnedSslCertificate(issuedToCName: String, issuedToOName: String, issuedToUName: String, issuedByCName: String, issuedByOName: String, issuedByUName: String, startDate: Date, endDate: Date) {
208 // Store the pinned SSL certificate information.
209 pinnedSslIssuedToCName = issuedToCName
210 pinnedSslIssuedToOName = issuedToOName
211 pinnedSslIssuedToUName = issuedToUName
212 pinnedSslIssuedByCName = issuedByCName
213 pinnedSslIssuedByOName = issuedByOName
214 pinnedSslIssuedByUName = issuedByUName
215 pinnedSslStartDate = startDate
216 pinnedSslEndDate = endDate
218 // Set the pinned SSL certificate tracker.
219 hasPinnedSslCertificate = true
222 fun getPinnedSslCertificate(): Pair<Array<String>, Array<Date>> {
223 // Create the SSL certificate string array.
224 val sslCertificateStringArray = arrayOf(pinnedSslIssuedToCName, pinnedSslIssuedToOName, pinnedSslIssuedToUName, pinnedSslIssuedByCName, pinnedSslIssuedByOName, pinnedSslIssuedByUName)
226 // Create the SSL certificate date array.
227 val sslCertificateDateArray = arrayOf(pinnedSslStartDate, pinnedSslEndDate)
229 // Return the pinned SSL certificate pair.
230 return Pair(sslCertificateStringArray, sslCertificateDateArray)
233 fun clearPinnedSslCertificate() {
234 // Clear the pinned SSL certificate.
235 pinnedSslIssuedToCName = ""
236 pinnedSslIssuedToOName = ""
237 pinnedSslIssuedToUName = ""
238 pinnedSslIssuedByCName = ""
239 pinnedSslIssuedByOName = ""
240 pinnedSslIssuedByUName = ""
241 pinnedSslStartDate = Date(0)
242 pinnedSslEndDate = Date(0)
244 // Clear the pinned SSL certificate tracker.
245 hasPinnedSslCertificate = false
249 // Resource requests.
250 fun addResourceRequest(resourceRequest: Array<String>) {
251 // Add the resource request to the list.
252 resourceRequests.add(resourceRequest)
255 fun getResourceRequests(): List<Array<String>> {
256 // Return the list of resource requests as an array list.
257 return resourceRequests
260 fun clearResourceRequests() {
261 // Clear the resource requests.
262 resourceRequests.clear()
266 // Resource request counters.
267 fun incrementRequestsCount(blocklist: Int) {
268 // Increment the count of the indicated blocklist.
270 BLOCKED_REQUESTS -> blockedRequests++
271 EASYLIST -> easyListBlockedRequests++
272 EASYPRIVACY -> easyPrivacyBlockedRequests++
273 FANBOYS_ANNOYANCE_LIST -> fanboysAnnoyanceListBlockedRequests++
274 FANBOYS_SOCIAL_BLOCKING_LIST -> fanboysSocialBlockingListBlockedRequests++
275 ULTRALIST -> ultraListBlockedRequests++
276 ULTRAPRIVACY -> ultraPrivacyBlockedRequests++
277 THIRD_PARTY_REQUESTS -> thirdPartyBlockedRequests++
281 fun getRequestsCount(blocklist: Int): Int {
282 // Return the count of the indicated blocklist.
283 return when (blocklist) {
284 BLOCKED_REQUESTS -> blockedRequests
285 EASYLIST -> easyListBlockedRequests
286 EASYPRIVACY -> easyPrivacyBlockedRequests
287 FANBOYS_ANNOYANCE_LIST -> fanboysAnnoyanceListBlockedRequests
288 FANBOYS_SOCIAL_BLOCKING_LIST -> fanboysSocialBlockingListBlockedRequests
289 ULTRALIST -> ultraListBlockedRequests
290 ULTRAPRIVACY -> ultraPrivacyBlockedRequests
291 THIRD_PARTY_REQUESTS -> thirdPartyBlockedRequests
292 else -> 0 // Return 0. This should never be called, but it is required by the return when statement.
296 fun resetRequestsCounters() {
297 // Reset all the resource request counters.
299 easyListBlockedRequests = 0
300 easyPrivacyBlockedRequests = 0
301 fanboysAnnoyanceListBlockedRequests = 0
302 fanboysSocialBlockingListBlockedRequests = 0
303 ultraListBlockedRequests = 0
304 ultraPrivacyBlockedRequests = 0
305 thirdPartyBlockedRequests = 0
309 // Publicly expose the scroll ranges.
310 fun getHorizontalScrollRange(): Int {
311 // Return the horizontal scroll range.
312 return computeHorizontalScrollRange()
315 fun getVerticalScrollRange(): Int {
316 // Return the vertical scroll range.
317 return computeVerticalScrollRange()
320 override fun onOverScrolled(scrollX: Int, scrollY: Int, clampedX: Boolean, clampedY: Boolean) {
321 // Run the default commands.
322 super.onOverScrolled(scrollX, scrollY, clampedX, clampedY)
324 // Display the bottom app bar if it has been hidden and the WebView was over-scrolled at the top of the screen.
325 if ((MainWebViewActivity.appBarLayout.translationY != 0f) && (scrollY == 0) && clampedY) {
326 // Animate the bottom app bar onto the screen.
327 val objectAnimator = ObjectAnimator.ofFloat(MainWebViewActivity.appBarLayout, "translationY", 0f)
330 objectAnimator.start()
335 @SuppressLint("ClickableViewAccessibility")
336 override fun onTouchEvent(motionEvent: MotionEvent): Boolean {
337 // Run the commands for the given motion event action.
338 when (motionEvent.action) {
339 MotionEvent.ACTION_DOWN -> {
340 // Start nested scrolling along the vertical axis. `ViewCompat` must be used until the minimum API >= 21.
341 startNestedScroll(ViewCompat.SCROLL_AXIS_VERTICAL)
343 // Save the current Y position. Action down will not be called again until a new motion starts.
344 previousYPosition = motionEvent.y.toInt()
346 MotionEvent.ACTION_MOVE -> {
347 // Get the current Y position.
348 val currentYMotionPosition = motionEvent.y.toInt()
350 // Calculate the pre-scroll delta Y.
351 val preScrollDeltaY = previousYPosition - currentYMotionPosition
353 // Initialize a variable to track how much of the scroll is consumed.
354 val consumedScroll = IntArray(2)
356 // Initialize a variable to track the offset in the window.
357 val offsetInWindow = IntArray(2)
359 // Get the WebView Y position.
360 val webViewYPosition = scrollY
362 // Set the scroll delta Y to initially be the same as the pre-scroll delta Y.
363 var scrollDeltaY = preScrollDeltaY
365 // Dispatch the nested pre-school. This scrolls the app bar if it needs it. `offsetInWindow` will be returned with an updated value.
366 if (dispatchNestedPreScroll(0, preScrollDeltaY, consumedScroll, offsetInWindow)) {
367 // Update the scroll delta Y if some of it was consumed.
368 scrollDeltaY = preScrollDeltaY - consumedScroll[1]
371 // Check to see if the WebView is at the top and and the scroll action is downward.
372 if (webViewYPosition == 0 && scrollDeltaY < 0) { // Swipe to refresh is being engaged.
373 // Stop the nested scroll so that swipe to refresh has complete control. This way releasing the scroll to refresh circle doesn't scroll the WebView at the same time.
375 } else { // Swipe to refresh is not being engaged.
376 // Start the nested scroll so that the app bar can scroll off the screen.
377 startNestedScroll(ViewCompat.SCROLL_AXIS_VERTICAL)
379 // Dispatch the nested scroll. This scrolls the WebView. The delta Y unconsumed normally controls the swipe refresh layout, but that is handled with the `if` statement above.
380 dispatchNestedScroll(0, scrollDeltaY, 0, 0, offsetInWindow)
382 // Store the current Y position for use in the next action move.
383 previousYPosition -= scrollDeltaY
386 else -> stopNestedScroll() // Stop nested scrolling.
389 // Perform a click. This is required by the Android accessibility guidelines.
392 // Run the default commands and return the result.
393 return super.onTouchEvent(motionEvent)
398 fun saveNestedScrollWebViewState(): Bundle {
399 // Create a saved state bundle.
400 val savedState = Bundle()
402 // Populate the saved state bundle.
403 savedState.putBoolean(DOMAIN_SETTINGS_APPLIED, domainSettingsApplied)
404 savedState.putInt(DOMAIN_SETTINGS_DATABASE_ID, domainSettingsDatabaseId)
405 savedState.putString(CURRENT_DOMAIN_NAME, currentDomainName)
406 savedState.putString(CURRENT_URl, currentUrl)
407 savedState.putBoolean(ACCEPT_COOKIES, acceptCookies)
408 savedState.putBoolean(EASYLIST_ENABLED, easyListEnabled)
409 savedState.putBoolean(EASYPRIVACY_ENABLED, easyPrivacyEnabled)
410 savedState.putBoolean(FANBOYS_ANNOYANCE_LIST_ENABLED, fanboysAnnoyanceListEnabled)
411 savedState.putBoolean(FANBOYS_SOCIAL_BLOCKING_LIST_ENABLED, fanboysSocialBlockingListEnabled)
412 savedState.putBoolean(ULTRALIST_ENABLED, ultraListEnabled)
413 savedState.putBoolean(ULTRAPRIVACY_ENABLED, ultraPrivacyEnabled)
414 savedState.putBoolean(BLOCK_ALL_THIRD_PARTY_REQUESTS, blockAllThirdPartyRequests)
415 savedState.putBoolean(HAS_PINNED_SSL_CERTIFICATE, hasPinnedSslCertificate)
416 savedState.putString(PINNED_SSL_ISSUED_TO_CNAME, pinnedSslIssuedToCName)
417 savedState.putString(PINNED_SSL_ISSUED_TO_ONAME, pinnedSslIssuedToOName)
418 savedState.putString(PINNED_SSL_ISSUED_TO_UNAME, pinnedSslIssuedToUName)
419 savedState.putString(PINNED_SSL_ISSUED_BY_CNAME, pinnedSslIssuedByCName)
420 savedState.putString(PINNED_SSL_ISSUED_BY_ONAME, pinnedSslIssuedByOName)
421 savedState.putString(PINNED_SSL_ISSUED_BY_UNAME, pinnedSslIssuedByUName)
422 savedState.putLong(PINNED_SSL_START_DATE, pinnedSslStartDate.time)
423 savedState.putLong(PINNED_SSL_END_DATE, pinnedSslEndDate.time)
424 savedState.putString(PINNED_IP_ADDRESSES, pinnedIpAddresses)
425 savedState.putBoolean(IGNORE_PINNED_DOMAIN_INFORMATION, ignorePinnedDomainInformation)
426 savedState.putBoolean(SWIPE_TO_REFRESH, swipeToRefresh)
427 savedState.putBoolean(JAVASCRIPT_ENABLED, this.settings.javaScriptEnabled)
428 savedState.putBoolean(DOM_STORAGE_ENABLED, this.settings.domStorageEnabled)
429 savedState.putString(USER_AGENT, this.settings.userAgentString)
430 savedState.putBoolean(WIDE_VIEWPORT, this.settings.useWideViewPort)
431 savedState.putInt(FONT_SIZE, this.settings.textZoom)
433 // Return the saved state bundle.
437 // Restore the state.
438 fun restoreNestedScrollWebViewState(savedState: Bundle) {
439 // Restore the class variables.
440 domainSettingsApplied = savedState.getBoolean(DOMAIN_SETTINGS_APPLIED)
441 domainSettingsDatabaseId = savedState.getInt(DOMAIN_SETTINGS_DATABASE_ID)
442 currentDomainName = savedState.getString(CURRENT_DOMAIN_NAME)!!
443 currentUrl = savedState.getString(CURRENT_URl)!!
444 acceptCookies = savedState.getBoolean(ACCEPT_COOKIES)
445 easyListEnabled = savedState.getBoolean(EASYLIST_ENABLED)
446 easyPrivacyEnabled = savedState.getBoolean(EASYPRIVACY_ENABLED)
447 fanboysAnnoyanceListEnabled = savedState.getBoolean(FANBOYS_ANNOYANCE_LIST_ENABLED)
448 fanboysSocialBlockingListEnabled = savedState.getBoolean(FANBOYS_SOCIAL_BLOCKING_LIST_ENABLED)
449 ultraListEnabled = savedState.getBoolean(ULTRALIST_ENABLED)
450 ultraPrivacyEnabled = savedState.getBoolean(ULTRAPRIVACY_ENABLED)
451 blockAllThirdPartyRequests = savedState.getBoolean(BLOCK_ALL_THIRD_PARTY_REQUESTS)
452 hasPinnedSslCertificate = savedState.getBoolean(HAS_PINNED_SSL_CERTIFICATE)
453 pinnedSslIssuedToCName = savedState.getString(PINNED_SSL_ISSUED_TO_CNAME)!!
454 pinnedSslIssuedToOName = savedState.getString(PINNED_SSL_ISSUED_TO_ONAME)!!
455 pinnedSslIssuedToUName = savedState.getString(PINNED_SSL_ISSUED_TO_UNAME)!!
456 pinnedSslIssuedByCName = savedState.getString(PINNED_SSL_ISSUED_BY_CNAME)!!
457 pinnedSslIssuedByOName = savedState.getString(PINNED_SSL_ISSUED_BY_ONAME)!!
458 pinnedSslIssuedByUName = savedState.getString(PINNED_SSL_ISSUED_BY_UNAME)!!
459 pinnedSslStartDate = Date(savedState.getLong(PINNED_SSL_START_DATE))
460 pinnedSslEndDate = Date(savedState.getLong(PINNED_SSL_END_DATE))
461 pinnedIpAddresses = savedState.getString(PINNED_IP_ADDRESSES)!!
462 ignorePinnedDomainInformation = savedState.getBoolean(IGNORE_PINNED_DOMAIN_INFORMATION)
463 swipeToRefresh = savedState.getBoolean(SWIPE_TO_REFRESH)
464 this.settings.javaScriptEnabled = savedState.getBoolean(JAVASCRIPT_ENABLED)
465 this.settings.domStorageEnabled = savedState.getBoolean(DOM_STORAGE_ENABLED)
466 this.settings.userAgentString = savedState.getString(USER_AGENT)
467 this.settings.useWideViewPort = savedState.getBoolean(WIDE_VIEWPORT)
468 this.settings.textZoom = savedState.getInt(FONT_SIZE)
472 // Method from NestedScrollingChild.
473 override fun setNestedScrollingEnabled(status: Boolean) {
474 // Set the status of the nested scrolling.
475 nestedScrollingChildHelper.isNestedScrollingEnabled = status
478 // Method from NestedScrollingChild.
479 override fun isNestedScrollingEnabled(): Boolean {
480 // Return the status of nested scrolling.
481 return nestedScrollingChildHelper.isNestedScrollingEnabled
484 // Method from NestedScrollingChild.
485 override fun startNestedScroll(axes: Int): Boolean {
486 // Start a nested scroll along the indicated axes.
487 return nestedScrollingChildHelper.startNestedScroll(axes)
490 // Method from NestedScrollingChild2.
491 override fun startNestedScroll(axes: Int, type: Int): Boolean {
492 // Start a nested scroll along the indicated axes for the given type of input which caused the scroll event.
493 return nestedScrollingChildHelper.startNestedScroll(axes, type)
496 // Method from NestedScrollingChild.
497 override fun stopNestedScroll() {
498 // Stop the nested scroll.
499 nestedScrollingChildHelper.stopNestedScroll()
502 // Method from NestedScrollingChild2.
503 override fun stopNestedScroll(type: Int) {
504 // Stop the nested scroll of the given type of input which caused the scroll event.
505 nestedScrollingChildHelper.stopNestedScroll(type)
508 // Method from NestedScrollingChild.
509 override fun hasNestedScrollingParent(): Boolean {
510 // Return the status of the nested scrolling parent.
511 return nestedScrollingChildHelper.hasNestedScrollingParent()
514 // Method from NestedScrollingChild2.
515 override fun hasNestedScrollingParent(type: Int): Boolean {
516 // return the status of the nested scrolling parent for the given type of input which caused the scroll event.
517 return nestedScrollingChildHelper.hasNestedScrollingParent(type)
520 // Method from NestedScrollingChild.
521 override fun dispatchNestedPreScroll(deltaX: Int, deltaY: Int, consumed: IntArray?, offsetInWindow: IntArray?): Boolean {
522 // Dispatch a nested pre-scroll with the specified deltas, which lets a parent to consume some of the scroll if desired.
523 return nestedScrollingChildHelper.dispatchNestedPreScroll(deltaX, deltaY, consumed, offsetInWindow)
526 // Method from NestedScrollingChild2.
527 override fun dispatchNestedPreScroll(deltaX: Int, deltaY: Int, consumed: IntArray?, offsetInWindow: IntArray?, type: Int): Boolean {
528 // Dispatch a nested pre-scroll with the specified deltas for the given type of input which caused the scroll event, which lets a parent to consume some of the scroll if desired.
529 return nestedScrollingChildHelper.dispatchNestedPreScroll(deltaX, deltaY, consumed, offsetInWindow, type)
532 // Method from NestedScrollingChild.
533 override fun dispatchNestedScroll(deltaXConsumed: Int, deltaYConsumed: Int, deltaXUnconsumed: Int, deltaYUnconsumed: Int, offsetInWindow: IntArray?): Boolean {
534 // Dispatch a nested scroll with the specified deltas.
535 return nestedScrollingChildHelper.dispatchNestedScroll(deltaXConsumed, deltaYConsumed, deltaXUnconsumed, deltaYUnconsumed, offsetInWindow)
538 // Method from NestedScrollingChild2.
539 override fun dispatchNestedScroll(deltaXConsumed: Int, deltaYConsumed: Int, deltaXUnconsumed: Int, deltaYUnconsumed: Int, offsetInWindow: IntArray?, type: Int): Boolean {
540 // Dispatch a nested scroll with the specified deltas for the given type of input which caused the scroll event.
541 return nestedScrollingChildHelper.dispatchNestedScroll(deltaXConsumed, deltaYConsumed, deltaXUnconsumed, deltaYUnconsumed, offsetInWindow, type)
544 // Method from NestedScrollingChild.
545 override fun dispatchNestedPreFling(velocityX: Float, velocityY: Float): Boolean {
546 // Dispatch a nested pre-fling with the specified velocity, which lets a parent consume the fling if desired.
547 return nestedScrollingChildHelper.dispatchNestedPreFling(velocityX, velocityY)
550 // Method from NestedScrollingChild.
551 override fun dispatchNestedFling(velocityX: Float, velocityY: Float, consumed: Boolean): Boolean {
552 // Dispatch a nested fling with the specified velocity.
553 return nestedScrollingChildHelper.dispatchNestedFling(velocityX, velocityY, consumed)