79 lines
2.9 KiB
Kotlin
79 lines
2.9 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.ScaleGestureDetector
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import android.view.animation.AnimationSet
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import android.view.animation.DecelerateInterpolator
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import android.view.animation.ScaleAnimation
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import android.view.animation.TranslateAnimation
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import android.webkit.WebView
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import android.widget.LinearLayout
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import androidx.recyclerview.widget.RecyclerView
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import kotlin.math.max
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import kotlin.math.min
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internal class MessageBodyScaleListener(
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private val wvScrollView: RecyclerView,
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private val messageBodyWebView: WebView,
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private val directParent: LinearLayout
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) : ScaleGestureDetector.SimpleOnScaleGestureListener() {
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private var scaleFactor = 1f
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private var preSF = 1f
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override fun onScale(detector: ScaleGestureDetector): Boolean {
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wvScrollView.requestDisallowInterceptTouchEvent(true)
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scaleFactor *= detector.scaleFactor
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// Don't let the object get too small or too large.
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scaleFactor = max(0.1f, min(scaleFactor, 10.0f))
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val a = messageBodyWebView.scrollY
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messageBodyWebView.scrollTo(0, 0)
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directParent.scrollTo(0, 0)
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val animSet = AnimationSet(true)
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animSet.fillAfter = true
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animSet.duration = 1000
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animSet.interpolator = DecelerateInterpolator()
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val translate = TranslateAnimation(0f, 0f, 0f, (-a).toFloat())
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animSet.addAnimation(translate)
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val scale = ScaleAnimation(
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preSF, scaleFactor, preSF, scaleFactor, ScaleAnimation.RELATIVE_TO_PARENT, 0.5f,
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ScaleAnimation.RELATIVE_TO_PARENT, 0.5f
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)
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animSet.addAnimation(scale)
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val animSet3 = AnimationSet(true)
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animSet3.fillAfter = true
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animSet3.duration = 1000
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animSet3.interpolator = DecelerateInterpolator()
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val translate3 = TranslateAnimation(0f, 0f, 0f, (-a).toFloat())
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animSet3.addAnimation(translate3)
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val scale3 = ScaleAnimation(
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preSF, preSF, preSF, scaleFactor, ScaleAnimation.RELATIVE_TO_PARENT, 0f, ScaleAnimation.RELATIVE_TO_PARENT,
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0f
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)
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animSet3.addAnimation(scale3)
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preSF = scaleFactor
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return true
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}
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}
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