72 lines
2.5 KiB
Kotlin
72 lines
2.5 KiB
Kotlin
/*
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* Copyright (c) 2022 Proton AG
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*
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* This file is part of Proton Mail.
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*
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* Proton Mail is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Proton Mail is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Proton Mail. If not, see https://www.gnu.org/licenses/.
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*/
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package ch.protonmail.android.activities.messageDetails.body
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import android.view.MotionEvent
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import android.view.ScaleGestureDetector
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import android.view.View
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import android.view.ViewParent
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import android.webkit.WebView
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internal class MessageBodyTouchListener(
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private val wvScrollView: ViewParent,
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private val scaleDetector: ScaleGestureDetector,
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private val scaledTouchSlop: Int
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) : View.OnTouchListener {
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private var mDownX = 0f
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private var mDownY = 0f
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override fun onTouch(v: View, motionEvent: MotionEvent): Boolean {
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if (v is WebView) {
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when (motionEvent.actionMasked) {
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MotionEvent.ACTION_DOWN -> {
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mDownX = motionEvent.rawX
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mDownY = motionEvent.rawY
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}
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MotionEvent.ACTION_MOVE -> {
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val deltaX = motionEvent.rawX - mDownX
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val deltaY = motionEvent.rawY - mDownY
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if (Math.abs(deltaX) > scaledTouchSlop && Math.abs(
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deltaY
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) < scaledTouchSlop || motionEvent.pointerCount > 1
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) {
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wvScrollView.requestDisallowInterceptTouchEvent(true)
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}
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}
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MotionEvent.ACTION_UP -> {
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mDownX = 0f
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mDownY = 0f
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wvScrollView.requestDisallowInterceptTouchEvent(false)
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}
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MotionEvent.ACTION_CANCEL -> {
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mDownX = 0f
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mDownY = 0f
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wvScrollView.requestDisallowInterceptTouchEvent(false)
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}
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else -> {
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// NO OP
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}
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}
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}
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scaleDetector.onTouchEvent(motionEvent)
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return false
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}
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}
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