287 lines
11 KiB
Kotlin
287 lines
11 KiB
Kotlin
package sushi.hardcore.droidfs.file_viewers
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import android.content.res.Configuration
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import android.graphics.Bitmap
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import android.graphics.Matrix
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import android.graphics.drawable.Drawable
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import android.os.Handler
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import android.view.MotionEvent
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import android.view.View
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import android.view.WindowManager
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import android.widget.Toast
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import androidx.activity.addCallback
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import androidx.activity.viewModels
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import androidx.lifecycle.ViewModel
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import com.bumptech.glide.Glide
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import com.bumptech.glide.RequestBuilder
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import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool
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import com.bumptech.glide.load.resource.bitmap.BitmapTransformation
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import sushi.hardcore.droidfs.Constants
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import sushi.hardcore.droidfs.R
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import sushi.hardcore.droidfs.databinding.ActivityImageViewerBinding
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import sushi.hardcore.droidfs.widgets.CustomAlertDialogBuilder
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import sushi.hardcore.droidfs.widgets.ZoomableImageView
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import java.io.ByteArrayInputStream
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import java.io.ByteArrayOutputStream
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import java.io.File
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import java.security.MessageDigest
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import kotlin.math.abs
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class ImageViewer: FileViewerActivity() {
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companion object {
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private const val hideDelay: Long = 3000
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private const val MIN_SWIPE_DISTANCE = 150
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}
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class ImageViewModel : ViewModel() {
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var imageBytes: ByteArray? = null
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var rotationAngle: Float = 0f
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}
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private lateinit var fileName: String
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private lateinit var handler: Handler
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private val imageViewModel: ImageViewModel by viewModels()
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private var requestBuilder: RequestBuilder<Drawable>? = null
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private var x1 = 0F
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private var x2 = 0F
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private var slideshowActive = false
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private var orientationTransformation: OrientationTransformation? = null
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private val hideUI = Runnable {
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binding.actionButtons.visibility = View.GONE
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binding.topBar.visibility = View.GONE
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hideSystemUi()
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}
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private val slideshowNext = Runnable {
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if (slideshowActive){
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binding.imageViewer.resetZoomFactor()
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swipeImage(-1F, true)
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}
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}
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private lateinit var binding: ActivityImageViewerBinding
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override fun getFileType(): String {
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return "image"
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}
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override fun viewFile() {
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binding = ActivityImageViewerBinding.inflate(layoutInflater)
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setContentView(binding.root)
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supportActionBar?.hide()
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showPartialSystemUi()
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applyNavigationBarMargin(binding.root)
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handler = Handler(mainLooper)
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binding.imageViewer.setOnInteractionListener(object : ZoomableImageView.OnInteractionListener {
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override fun onSingleTap(event: MotionEvent?) {
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handler.removeCallbacks(hideUI)
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if (binding.actionButtons.visibility == View.GONE) {
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binding.actionButtons.visibility = View.VISIBLE
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binding.topBar.visibility = View.VISIBLE
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showPartialSystemUi()
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handler.postDelayed(hideUI, hideDelay)
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} else {
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hideUI.run()
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}
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}
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override fun onTouch(event: MotionEvent?) {
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if (!binding.imageViewer.isZoomed) {
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when (event?.action) {
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MotionEvent.ACTION_DOWN -> {
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x1 = event.x
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}
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MotionEvent.ACTION_UP -> {
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x2 = event.x
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val deltaX = x2 - x1
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if (abs(deltaX) > MIN_SWIPE_DISTANCE) {
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askSaveRotation { swipeImage(deltaX) }
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}
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}
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}
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}
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}
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})
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binding.imageDelete.setOnClickListener {
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CustomAlertDialogBuilder(this, theme)
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.keepFullScreen()
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.setTitle(R.string.warning)
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.setPositiveButton(R.string.ok) { _, _ ->
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createPlaylist() //be sure the playlist is created before deleting if there is only one image
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if (encryptedVolume.deleteFile(filePath)) {
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playlistNext(true)
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refreshPlaylist()
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if (mappedPlaylist.size == 0) { //deleted all images of the playlist
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goBackToExplorer()
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} else {
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loadImage(true)
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}
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} else {
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CustomAlertDialogBuilder(this, theme)
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.keepFullScreen()
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.setTitle(R.string.error)
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.setMessage(getString(R.string.remove_failed, fileName))
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.setPositiveButton(R.string.ok, null)
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.show()
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}
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}
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.setNegativeButton(R.string.cancel, null)
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.setMessage(getString(R.string.single_delete_confirm, fileName))
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.show()
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}
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binding.imageButtonSlideshow.setOnClickListener {
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if (!slideshowActive){
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slideshowActive = true
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handler.postDelayed(slideshowNext, Constants.SLIDESHOW_DELAY)
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window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
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hideUI.run()
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Toast.makeText(this, R.string.slideshow_started, Toast.LENGTH_SHORT).show()
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} else {
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stopSlideshow()
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}
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}
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binding.imagePrevious.setOnClickListener {
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askSaveRotation {
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binding.imageViewer.resetZoomFactor()
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swipeImage(1F)
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}
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}
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binding.imageNext.setOnClickListener {
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askSaveRotation {
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binding.imageViewer.resetZoomFactor()
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swipeImage(-1F)
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}
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}
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binding.imageRotateRight.setOnClickListener { onClickRotate(90f) }
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binding.imageRotateLeft.setOnClickListener { onClickRotate(-90f) }
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onBackPressedDispatcher.addCallback(this) {
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if (slideshowActive) {
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stopSlideshow()
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} else {
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askSaveRotation {
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isEnabled = false
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onBackPressedDispatcher.onBackPressed()
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}
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}
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}
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loadImage(false)
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handler.postDelayed(hideUI, hideDelay)
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}
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private fun loadImage(newImage: Boolean) {
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fileName = File(filePath).name
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binding.textFilename.text = fileName
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if (newImage || imageViewModel.imageBytes == null) {
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loadWholeFile(filePath) {
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imageViewModel.imageBytes = it
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requestBuilder = Glide.with(this).load(it)
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requestBuilder?.into(binding.imageViewer)
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imageViewModel.rotationAngle = 0f
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}
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} else {
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requestBuilder = Glide.with(this).load(imageViewModel.imageBytes)
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if (imageViewModel.rotationAngle.mod(360f) != 0f) {
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rotateImage()
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} else {
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requestBuilder?.into(binding.imageViewer)
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}
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}
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}
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override fun onUserInteraction() {
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super.onUserInteraction()
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handler.removeCallbacks(hideUI)
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handler.postDelayed(hideUI, hideDelay)
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}
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private fun onClickRotate(angle: Float) {
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imageViewModel.rotationAngle += angle
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binding.imageViewer.restoreZoomNormal()
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rotateImage()
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}
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private fun swipeImage(deltaX: Float, slideshowSwipe: Boolean = false){
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playlistNext(deltaX < 0)
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loadImage(true)
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if (slideshowActive) {
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if (!slideshowSwipe) { //reset slideshow delay if user swipes
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handler.removeCallbacks(slideshowNext)
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}
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handler.postDelayed(slideshowNext, Constants.SLIDESHOW_DELAY)
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}
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}
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private fun stopSlideshow(){
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slideshowActive = false
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window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
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Toast.makeText(this, R.string.slideshow_stopped, Toast.LENGTH_SHORT).show()
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}
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class OrientationTransformation(private val orientation: Float): BitmapTransformation() {
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lateinit var bitmap: Bitmap
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override fun transform(pool: BitmapPool, toTransform: Bitmap, outWidth: Int, outHeight: Int): Bitmap? {
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return Bitmap.createBitmap(toTransform, 0, 0, toTransform.width, toTransform.height, Matrix().apply {
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postRotate(orientation)
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}, true).also {
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bitmap = it
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}
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}
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override fun updateDiskCacheKey(messageDigest: MessageDigest) {
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messageDigest.update("rotate$orientation".toByteArray())
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}
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}
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private fun rotateImage() {
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orientationTransformation = OrientationTransformation(imageViewModel.rotationAngle)
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requestBuilder?.transform(orientationTransformation)?.into(binding.imageViewer)
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}
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private fun askSaveRotation(callback: () -> Unit){
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if (imageViewModel.rotationAngle.mod(360f) != 0f && !slideshowActive) {
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CustomAlertDialogBuilder(this, theme)
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.keepFullScreen()
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.setTitle(R.string.warning)
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.setMessage(R.string.ask_save_img_rotated)
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.setNegativeButton(R.string.no) { _, _ -> callback() }
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.setNeutralButton(R.string.cancel, null)
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.setPositiveButton(R.string.yes) { _, _ ->
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val outputStream = ByteArrayOutputStream()
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if (orientationTransformation?.bitmap?.compress(
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if (fileName.endsWith("png", true)){
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Bitmap.CompressFormat.PNG
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} else {
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Bitmap.CompressFormat.JPEG
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}, 90, outputStream) == true
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){
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if (encryptedVolume.importFile(ByteArrayInputStream(outputStream.toByteArray()), filePath)) {
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Toast.makeText(this, R.string.image_saved_successfully, Toast.LENGTH_SHORT).show()
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callback()
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} else {
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CustomAlertDialogBuilder(this, theme)
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.keepFullScreen()
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.setTitle(R.string.error)
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.setMessage(R.string.file_write_failed)
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.setPositiveButton(R.string.ok, null)
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.show()
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}
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} else {
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CustomAlertDialogBuilder(this, theme)
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.keepFullScreen()
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.setTitle(R.string.error)
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.setMessage(R.string.bitmap_compress_failed)
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.setPositiveButton(R.string.ok, null)
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.show()
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}
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}
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.show()
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} else {
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callback()
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}
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}
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override fun onConfigurationChanged(newConfig: Configuration) {
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super.onConfigurationChanged(newConfig)
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binding.imageViewer.restoreZoomNormal()
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}
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} |