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Roll back image viewer but retain swiping fix (#1863)

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This fixes crashes with images which were too wide (aspect ratio wise).
This commit is contained in:
Ivan Kupalov 2020-07-27 10:42:39 +02:00 committed by GitHub
parent b3b4794a2b
commit f37a589dce
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 73 additions and 61 deletions
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2
app/build.gradle
View file

@ -159,7 +159,7 @@ dependencies {
implementation "com.github.connyduck:sparkbutton:4.0.0"
implementation 'com.github.MikeOrtiz:TouchImageView:3.0.1'
implementation "com.github.chrisbanes:PhotoView:2.3.0"
implementation "com.mikepenz:materialdrawer:$materialdrawerVersion"
implementation "com.mikepenz:materialdrawer-iconics:$materialdrawerVersion"

6
app/src/main/java/com/keylesspalace/tusky/components/compose/dialog/CaptionDialog.kt
View file

@ -33,9 +33,9 @@ import at.connyduck.sparkbutton.helpers.Utils
import com.bumptech.glide.Glide
import com.bumptech.glide.request.target.CustomTarget
import com.bumptech.glide.request.transition.Transition
import com.github.chrisbanes.photoview.PhotoView
import com.keylesspalace.tusky.R
import com.keylesspalace.tusky.util.withLifecycleContext
import com.ortiz.touchview.TouchImageView
// https://github.com/tootsuite/mastodon/blob/1656663/app/models/media_attachment.rb#L94
private const val MEDIA_DESCRIPTION_CHARACTER_LIMIT = 420
@ -50,8 +50,8 @@ fun <T> T.makeCaptionDialog(existingDescription: String?,
dialogLayout.setPadding(padding, padding, padding, padding)
dialogLayout.orientation = LinearLayout.VERTICAL
val imageView = TouchImageView(this).apply {
maxZoom = 6f
val imageView = PhotoView(this).apply {
maximumScale = 6f
}
val displayMetrics = DisplayMetrics()

124
app/src/main/java/com/keylesspalace/tusky/fragment/ViewImageFragment.kt
View file

@ -29,6 +29,7 @@ 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.Target
import com.github.chrisbanes.photoview.PhotoViewAttacher
import com.keylesspalace.tusky.R
import com.keylesspalace.tusky.entity.Attachment
import com.keylesspalace.tusky.util.hide
@ -45,6 +46,7 @@ class ViewImageFragment : ViewMediaFragment() {
fun onPhotoTap()
}
private lateinit var attacher: PhotoViewAttacher
private lateinit var photoActionsListener: PhotoActionsListener
private lateinit var toolbar: View
private var transition = BehaviorSubject.create<Unit>()
@ -61,9 +63,68 @@ class ViewImageFragment : ViewMediaFragment() {
photoActionsListener = context as PhotoActionsListener
}
@SuppressLint("ClickableViewAccessibility")
override fun setupMediaView(url: String, previewUrl: String?) {
descriptionView = mediaDescription
photoView.transitionName = url
attacher = PhotoViewAttacher(photoView).apply {
// This prevents conflicts with ViewPager
setAllowParentInterceptOnEdge(true)
// Clicking outside the photo closes the viewer.
setOnOutsidePhotoTapListener { photoActionsListener.onDismiss() }
setOnClickListener { onMediaTap() }
/* A vertical swipe motion also closes the viewer. This is especially useful when the photo
* mostly fills the screen so clicking outside is difficult. */
setOnSingleFlingListener { _, _, velocityX, velocityY ->
var result = false
if (abs(velocityY) > abs(velocityX)) {
photoActionsListener.onDismiss()
result = true
}
result
}
}
val gestureDetector = GestureDetector(requireContext(), object : GestureDetector.SimpleOnGestureListener() {
override fun onSingleTapConfirmed(e: MotionEvent?): Boolean {
onMediaTap()
return true
}
})
var lastY = 0f
photoView.setOnTouchListener { v, event ->
// This part is for scaling/translating on vertical move.
// We use raw coordinates to get the correct ones during scaling
gestureDetector.onTouchEvent(event)
if (event.action == MotionEvent.ACTION_DOWN) {
lastY = event.rawY
} else if (event.pointerCount == 1
&& attacher.scale == 1f
&& event.action == MotionEvent.ACTION_MOVE
) {
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
return@setOnTouchListener true
}
} else if (event.action == MotionEvent.ACTION_UP || event.action == MotionEvent.ACTION_CANCEL) {
onGestureEnd()
}
attacher.onTouch(v, event)
}
startedTransition = false
loadImageFromNetwork(url, previewUrl, photoView)
}
@ -74,64 +135,9 @@ class ViewImageFragment : ViewMediaFragment() {
return inflater.inflate(R.layout.fragment_view_image, container, false)
}
@SuppressLint("ClickableViewAccessibility")
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
val gestureDetector = GestureDetector(requireContext(), object : GestureDetector.SimpleOnGestureListener() {
override fun onSingleTapConfirmed(e: MotionEvent?): Boolean {
onMediaTap()
return true
}
})
var lastY = 0f
photoView.setOnTouchListener { _, event ->
// This part is for scaling/translating on vertical move.
// We use raw coordinates to get the correct ones during scaling
var result = true
gestureDetector.onTouchEvent(event)
if (event.action == MotionEvent.ACTION_DOWN) {
lastY = event.rawY
} else if (!photoView.isZoomed && event.action == MotionEvent.ACTION_MOVE) {
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
}
return@setOnTouchListener true
} else if (event.action == MotionEvent.ACTION_UP || event.action == MotionEvent.ACTION_CANCEL) {
onGestureEnd()
} else if (event.pointerCount >= 2 || photoView.canScrollHorizontally(1) && photoView.canScrollHorizontally(-1)) {
// Starting from here is adapted code from TouchImageView to play nice with pager.
// Can scroll horizontally checks if there's still a part of the image.
// That can be scrolled until you reach the edge multi-touch event.
val parent = view.parent
result = when (event.action) {
MotionEvent.ACTION_DOWN, MotionEvent.ACTION_MOVE -> {
// Disallow RecyclerView to intercept touch events.
parent.requestDisallowInterceptTouchEvent(true)
// Disable touch on view
false
}
MotionEvent.ACTION_UP -> {
// Allow RecyclerView to intercept touch events.
parent.requestDisallowInterceptTouchEvent(false)
true
}
else -> true
}
}
result
}
val arguments = this.requireArguments()
val attachment = arguments.getParcelable<Attachment>(ARG_ATTACHMENT)
@ -267,7 +273,13 @@ class ViewImageFragment : ViewMediaFragment() {
// another branch. take() will unsubscribe after we have it to not leak menmory
transition
.take(1)
.subscribe { target.onResourceReady(resource, null) }
.subscribe {
target.onResourceReady(resource, null)
// It's needed. Don't ask why, I don't know, setImageDrawable() should
// do it by itself but somehow it doesn't work automatically.
// Just do it. If you don't, image will jump around when touched.
attacher.update()
}
}
return true
}

2
app/src/main/res/layout/fragment_view_image.xml
View file

@ -7,7 +7,7 @@
android:clickable="true"
android:focusable="true">
<com.ortiz.touchview.TouchImageView
<com.github.chrisbanes.photoview.PhotoView
android:id="@+id/photoView"
android:layout_width="match_parent"
android:layout_height="match_parent" />