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ViewImageFragment: finalize transition to BigImageViewer. Now it should correctly handle EXIF rotation, do not stuck at transition and pick preview image if it's in cache but full image isn't

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This commit is contained in:
Alibek Omarov 2020-07-26 03:11:33 +03:00
parent 28a78a2566
commit 68cdbc65f8
1 changed files with 128 additions and 59 deletions
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187
app/src/main/java/com/keylesspalace/tusky/fragment/ViewImageFragment.kt
View File

@ -25,11 +25,15 @@ import android.os.Bundle
import android.util.Log
import android.view.*
import android.widget.TextView
import androidx.exifinterface.media.ExifInterface
import com.bumptech.glide.Glide
import com.bumptech.glide.load.DataSource
import com.bumptech.glide.load.engine.GlideException
import com.bumptech.glide.request.RequestListener
import com.bumptech.glide.request.target.CustomTarget
import com.bumptech.glide.request.target.Target
import com.bumptech.glide.request.transition.Transition
import com.github.piasy.biv.BigImageViewer
import com.github.piasy.biv.loader.ImageLoader
import com.github.piasy.biv.view.GlideImageViewFactory
import com.keylesspalace.tusky.R
@ -42,9 +46,10 @@ import kotlinx.android.synthetic.main.fragment_view_image.*
import java.io.File
import java.lang.Exception
import kotlin.math.abs
import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
class ViewImageFragment : ViewMediaFragment(), ImageLoader.Callback, View.OnTouchListener {
class ViewImageFragment : ViewMediaFragment() {
interface PhotoActionsListener {
fun onBringUp()
fun onDismiss()
@ -60,6 +65,10 @@ class ViewImageFragment : ViewMediaFragment(), ImageLoader.Callback, View.OnTouc
@Volatile
private var startedTransition = false
private var uri = Uri.EMPTY
private var previewUri = Uri.EMPTY
private var showingPreview = false
override lateinit var descriptionView: TextView
override fun onAttach(context: Context) {
super.onAttach(context)
@ -70,7 +79,11 @@ class ViewImageFragment : ViewMediaFragment(), ImageLoader.Callback, View.OnTouc
descriptionView = mediaDescription
photoView.transitionName = url
startedTransition = false
loadImageFromNetwork(url, previewUrl)
uri = Uri.parse(url)
if(previewUrl != null && !previewUrl.equals(url)) {
previewUri = Uri.parse(previewUrl)
}
loadImageFromNetwork()
}
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
@ -78,51 +91,52 @@ class ViewImageFragment : ViewMediaFragment(), ImageLoader.Callback, View.OnTouc
return inflater.inflate(R.layout.fragment_view_image, container, false)
}
private var lastY = 0.0f
private var swipeStartedWithOneFinger = false
private lateinit var gestureDetector : GestureDetector
override fun onTouch(v: View, event: MotionEvent): Boolean {
// This part is for scaling/translating on vertical move.
// We use raw coordinates to get the correct ones during scaling
gestureDetector.onTouchEvent(event)
private val imageOnTouchListener = object : View.OnTouchListener {
private var lastY = 0.0f
private var swipeStartedWithOneFinger = false
if(event.pointerCount != 1) {
swipeStartedWithOneFinger = false
return false
}
override fun onTouch(v: View, event: MotionEvent): Boolean {
// This part is for scaling/translating on vertical move.
// We use raw coordinates to get the correct ones during scaling
gestureDetector.onTouchEvent(event)
var result = false
when(event.action) {
MotionEvent.ACTION_DOWN -> {
swipeStartedWithOneFinger = true
lastY = event.rawY
}
MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> {
onGestureEnd()
if(event.pointerCount != 1) {
swipeStartedWithOneFinger = false
return false
}
MotionEvent.ACTION_MOVE -> {
if(swipeStartedWithOneFinger && photoView.ssiv.scale <= photoView.ssiv.minScale) {
val diff = event.rawY - lastY
// This code is to prevent transformations during page scrolling
// If we are already translating or we reached the threshold, then transform.
if (photoView.translationY != 0f || abs(diff) > 40) {
photoView.translationY += (diff)
val scale = (-abs(photoView.translationY) / 720 + 1).coerceAtLeast(0.5f)
photoView.scaleY = scale
photoView.scaleX = scale
lastY = event.rawY
when(event.action) {
MotionEvent.ACTION_DOWN -> {
swipeStartedWithOneFinger = true
lastY = event.rawY
}
MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> {
onGestureEnd()
swipeStartedWithOneFinger = false
}
MotionEvent.ACTION_MOVE -> {
if(swipeStartedWithOneFinger && photoView.ssiv.scale <= photoView.ssiv.minScale) {
val diff = event.rawY - lastY
// This code is to prevent transformations during page scrolling
// If we are already translating or we reached the threshold, then transform.
if (photoView.translationY != 0f || abs(diff) > 40) {
photoView.translationY += (diff)
val scale = (-abs(photoView.translationY) / 720 + 1).coerceAtLeast(0.5f)
photoView.scaleY = scale
photoView.scaleX = scale
lastY = event.rawY
}
}
result = true
}
}
}
return result
return false
}
}
@SuppressLint("ClickableViewAccessibility")
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
@ -135,7 +149,7 @@ class ViewImageFragment : ViewMediaFragment(), ImageLoader.Callback, View.OnTouc
})
// photoView.setOnTouchListener(this)
photoView.setImageLoaderCallback(this)
photoView.setImageLoaderCallback(imageLoaderCallback)
photoView.setImageViewFactory(GlideImageViewFactory())
val arguments = this.requireArguments()
@ -190,33 +204,88 @@ class ViewImageFragment : ViewMediaFragment(), ImageLoader.Callback, View.OnTouc
photoView.ssiv?.recycle()
}
private fun loadImageFromNetwork(url: String, previewUrl: String?) {
photoView.showImage(Uri.parse(previewUrl), Uri.parse(url))
private inner class DummyCacheTarget(val ctx: Context, val requestPreview : Boolean) : CustomTarget<File>() {
override fun onLoadCleared(placeholder: Drawable?) {}
override fun onLoadFailed(errorDrawable: Drawable?) {
if(requestPreview) {
// no preview, no full image in cache, load full image
// forget about fancy transition
showingPreview = false
photoView.showImage(uri)
} else {
// let's start downloading full image that we supposedly don't have
BigImageViewer.prefetch(uri)
// meanwhile poke cache about preview image
Glide.with(ctx).asFile()
.load(previewUri)
.dontAnimate()
.onlyRetrieveFromCache(true)
.into(DummyCacheTarget(ctx, true))
}
}
override fun onResourceReady(resource: File, transition: Transition<in File>?) {
showingPreview = requestPreview
if(requestPreview) {
// have preview cached but not full image
photoView.showImage(previewUri, uri, true)
} else {
photoView.showImage(uri)
}
}
}
override fun onSuccess(image: File?) {
progressBar?.hide() // Always hide the progress bar on success
photoActionsListener.onBringUp()
photoView.ssiv?.setOnTouchListener(this)
}
override fun onFail(error: Exception?) {
progressBar?.hide()
photoActionsListener.onBringUp()
}
override fun onCacheHit(imageType: Int, image: File?) {
}
override fun onCacheMiss(imageType: Int, image: File?) {
}
override fun onFinish() {
}
override fun onProgress(progress: Int) {
private fun loadImageFromNetwork() {
Glide.with(this).asFile()
.load(uri)
.onlyRetrieveFromCache(true)
.dontAnimate()
.into(DummyCacheTarget(context!!, false))
}
override fun onTransitionEnd() {
// if we had preview, load full image, as transition has ended
if (showingPreview) {
showingPreview = false
photoView.loadMainImageNow()
}
}
private val imageLoaderCallback = object : ImageLoader.Callback {
override fun onSuccess(image: File?) {
if(!showingPreview) {
progressBar?.hide()
photoView.ssiv?.let {
it.orientation = SubsamplingScaleImageView.ORIENTATION_USE_EXIF
it.setOnTouchListener(imageOnTouchListener)
}
}
}
override fun onFail(error: Exception?) {
progressBar?.hide()
}
override fun onCacheHit(imageType: Int, image: File?) {
// image is here, bring up the activity!
photoActionsListener.onBringUp()
}
override fun onStart() {
// cache miss but image is downloading, bring up the activity
photoActionsListener.onBringUp()
}
override fun onCacheMiss(imageType: Int, image: File?) {
// this callback is useless because it's called after
// image is downloaded or pulled from cache
// so in case of cache miss, onStart is used
}
override fun onFinish() {}
override fun onProgress(progress: Int) {
// TODO: make use of it :)
}
}
}